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1 | #undef BLOCKMOVE |
2 | #define Z_WAKE |
3 | #undef Z_EXT_CHARS_IN_BUFFER |
4 | |
5 | /* |
6 | * linux/drivers/char/cyclades.c |
7 | * |
8 | * This file contains the driver for the Cyclades async multiport |
9 | * serial boards. |
10 | * |
11 | * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>. |
12 | * Modified and maintained by Marcio Saito <marcio@cyclades.com>. |
13 | * |
14 | * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com> |
15 | * |
16 | * Much of the design and some of the code came from serial.c |
17 | * which was copyright (C) 1991, 1992 Linus Torvalds. It was |
18 | * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, |
19 | * and then fixed as suggested by Michael K. Johnson 12/12/92. |
20 | * Converted to pci probing and cleaned up by Jiri Slaby. |
21 | * |
22 | */ |
23 | |
24 | #define CY_VERSION "2.6" |
25 | |
26 | /* If you need to install more boards than NR_CARDS, change the constant |
27 | in the definition below. No other change is necessary to support up to |
28 | eight boards. Beyond that you'll have to extend cy_isa_addresses. */ |
29 | |
30 | #define NR_CARDS 4 |
31 | |
32 | /* |
33 | If the total number of ports is larger than NR_PORTS, change this |
34 | constant in the definition below. No other change is necessary to |
35 | support more boards/ports. */ |
36 | |
37 | #define NR_PORTS 256 |
38 | |
39 | #define ZO_V1 0 |
40 | #define ZO_V2 1 |
41 | #define ZE_V1 2 |
42 | |
43 | #define SERIAL_PARANOIA_CHECK |
44 | #undef CY_DEBUG_OPEN |
45 | #undef CY_DEBUG_THROTTLE |
46 | #undef CY_DEBUG_OTHER |
47 | #undef CY_DEBUG_IO |
48 | #undef CY_DEBUG_COUNT |
49 | #undef CY_DEBUG_DTR |
50 | #undef CY_DEBUG_WAIT_UNTIL_SENT |
51 | #undef CY_DEBUG_INTERRUPTS |
52 | #undef CY_16Y_HACK |
53 | #undef CY_ENABLE_MONITORING |
54 | #undef CY_PCI_DEBUG |
55 | |
56 | /* |
57 | * Include section |
58 | */ |
59 | #include <linux/module.h> |
60 | #include <linux/errno.h> |
61 | #include <linux/signal.h> |
62 | #include <linux/sched.h> |
63 | #include <linux/timer.h> |
64 | #include <linux/interrupt.h> |
65 | #include <linux/tty.h> |
66 | #include <linux/tty_flip.h> |
67 | #include <linux/serial.h> |
68 | #include <linux/major.h> |
69 | #include <linux/string.h> |
70 | #include <linux/fcntl.h> |
71 | #include <linux/ptrace.h> |
72 | #include <linux/cyclades.h> |
73 | #include <linux/mm.h> |
74 | #include <linux/ioport.h> |
75 | #include <linux/init.h> |
76 | #include <linux/delay.h> |
77 | #include <linux/spinlock.h> |
78 | #include <linux/bitops.h> |
79 | #include <linux/firmware.h> |
80 | #include <linux/device.h> |
81 | #include <linux/slab.h> |
82 | |
83 | #include <linux/io.h> |
84 | #include <linux/uaccess.h> |
85 | |
86 | #include <linux/kernel.h> |
87 | #include <linux/pci.h> |
88 | |
89 | #include <linux/stat.h> |
90 | #include <linux/proc_fs.h> |
91 | #include <linux/seq_file.h> |
92 | |
93 | static void cy_send_xchar(struct tty_struct *tty, char ch); |
94 | |
95 | #ifndef SERIAL_XMIT_SIZE |
96 | #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) |
97 | #endif |
98 | |
99 | #define STD_COM_FLAGS (0) |
100 | |
101 | /* firmware stuff */ |
102 | #define ZL_MAX_BLOCKS 16 |
103 | #define DRIVER_VERSION 0x02010203 |
104 | #define RAM_SIZE 0x80000 |
105 | |
106 | enum zblock_type { |
107 | ZBLOCK_PRG = 0, |
108 | ZBLOCK_FPGA = 1 |
109 | }; |
110 | |
111 | struct zfile_header { |
112 | char name[64]; |
113 | char date[32]; |
114 | char aux[32]; |
115 | u32 n_config; |
116 | u32 config_offset; |
117 | u32 n_blocks; |
118 | u32 block_offset; |
119 | u32 reserved[9]; |
120 | } __attribute__ ((packed)); |
121 | |
122 | struct zfile_config { |
123 | char name[64]; |
124 | u32 mailbox; |
125 | u32 function; |
126 | u32 n_blocks; |
127 | u32 block_list[ZL_MAX_BLOCKS]; |
128 | } __attribute__ ((packed)); |
129 | |
130 | struct zfile_block { |
131 | u32 type; |
132 | u32 file_offset; |
133 | u32 ram_offset; |
134 | u32 size; |
135 | } __attribute__ ((packed)); |
136 | |
137 | static struct tty_driver *cy_serial_driver; |
138 | |
139 | #ifdef CONFIG_ISA |
140 | /* This is the address lookup table. The driver will probe for |
141 | Cyclom-Y/ISA boards at all addresses in here. If you want the |
142 | driver to probe addresses at a different address, add it to |
143 | this table. If the driver is probing some other board and |
144 | causing problems, remove the offending address from this table. |
145 | */ |
146 | |
147 | static unsigned int cy_isa_addresses[] = { |
148 | 0xD0000, |
149 | 0xD2000, |
150 | 0xD4000, |
151 | 0xD6000, |
152 | 0xD8000, |
153 | 0xDA000, |
154 | 0xDC000, |
155 | 0xDE000, |
156 | 0, 0, 0, 0, 0, 0, 0, 0 |
157 | }; |
158 | |
159 | #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses) |
160 | |
161 | static long maddr[NR_CARDS]; |
162 | static int irq[NR_CARDS]; |
163 | |
164 | module_param_array(maddr, long, NULL, 0); |
165 | module_param_array(irq, int, NULL, 0); |
166 | |
167 | #endif /* CONFIG_ISA */ |
168 | |
169 | /* This is the per-card data structure containing address, irq, number of |
170 | channels, etc. This driver supports a maximum of NR_CARDS cards. |
171 | */ |
172 | static struct cyclades_card cy_card[NR_CARDS]; |
173 | |
174 | static int cy_next_channel; /* next minor available */ |
175 | |
176 | /* |
177 | * This is used to look up the divisor speeds and the timeouts |
178 | * We're normally limited to 15 distinct baud rates. The extra |
179 | * are accessed via settings in info->port.flags. |
180 | * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, |
181 | * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
182 | * HI VHI |
183 | * 20 |
184 | */ |
185 | static const int baud_table[] = { |
186 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
187 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, |
188 | 230400, 0 |
189 | }; |
190 | |
191 | static const char baud_co_25[] = { /* 25 MHz clock option table */ |
192 | /* value => 00 01 02 03 04 */ |
193 | /* divide by 8 32 128 512 2048 */ |
194 | 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, |
195 | 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
196 | }; |
197 | |
198 | static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */ |
199 | 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, |
200 | 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 |
201 | }; |
202 | |
203 | static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ |
204 | /* value => 00 01 02 03 04 */ |
205 | /* divide by 8 32 128 512 2048 */ |
206 | 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, |
207 | 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, |
208 | 0x00 |
209 | }; |
210 | |
211 | static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ |
212 | 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, |
213 | 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, |
214 | 0x21 |
215 | }; |
216 | |
217 | static const char baud_cor3[] = { /* receive threshold */ |
218 | 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
219 | 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07, |
220 | 0x07 |
221 | }; |
222 | |
223 | /* |
224 | * The Cyclades driver implements HW flow control as any serial driver. |
225 | * The cyclades_port structure member rflow and the vector rflow_thr |
226 | * allows us to take advantage of a special feature in the CD1400 to avoid |
227 | * data loss even when the system interrupt latency is too high. These flags |
228 | * are to be used only with very special applications. Setting these flags |
229 | * requires the use of a special cable (DTR and RTS reversed). In the new |
230 | * CD1400-based boards (rev. 6.00 or later), there is no need for special |
231 | * cables. |
232 | */ |
233 | |
234 | static const char rflow_thr[] = { /* rflow threshold */ |
235 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
236 | 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
237 | 0x0a |
238 | }; |
239 | |
240 | /* The Cyclom-Ye has placed the sequential chips in non-sequential |
241 | * address order. This look-up table overcomes that problem. |
242 | */ |
243 | static const unsigned int cy_chip_offset[] = { 0x0000, |
244 | 0x0400, |
245 | 0x0800, |
246 | 0x0C00, |
247 | 0x0200, |
248 | 0x0600, |
249 | 0x0A00, |
250 | 0x0E00 |
251 | }; |
252 | |
253 | /* PCI related definitions */ |
254 | |
255 | #ifdef CONFIG_PCI |
256 | static const struct pci_device_id cy_pci_dev_id[] = { |
257 | /* PCI < 1Mb */ |
258 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, |
259 | /* PCI > 1Mb */ |
260 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, |
261 | /* 4Y PCI < 1Mb */ |
262 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, |
263 | /* 4Y PCI > 1Mb */ |
264 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, |
265 | /* 8Y PCI < 1Mb */ |
266 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, |
267 | /* 8Y PCI > 1Mb */ |
268 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, |
269 | /* Z PCI < 1Mb */ |
270 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, |
271 | /* Z PCI > 1Mb */ |
272 | { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, |
273 | { } /* end of table */ |
274 | }; |
275 | MODULE_DEVICE_TABLE(pci, cy_pci_dev_id); |
276 | #endif |
277 | |
278 | static void cy_start(struct tty_struct *); |
279 | static void cy_set_line_char(struct cyclades_port *, struct tty_struct *); |
280 | static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32); |
281 | #ifdef CONFIG_ISA |
282 | static unsigned detect_isa_irq(void __iomem *); |
283 | #endif /* CONFIG_ISA */ |
284 | |
285 | #ifndef CONFIG_CYZ_INTR |
286 | static void cyz_poll(unsigned long); |
287 | |
288 | /* The Cyclades-Z polling cycle is defined by this variable */ |
289 | static long cyz_polling_cycle = CZ_DEF_POLL; |
290 | |
291 | static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0); |
292 | |
293 | #else /* CONFIG_CYZ_INTR */ |
294 | static void cyz_rx_restart(unsigned long); |
295 | static struct timer_list cyz_rx_full_timer[NR_PORTS]; |
296 | #endif /* CONFIG_CYZ_INTR */ |
297 | |
298 | static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val) |
299 | { |
300 | struct cyclades_card *card = port->card; |
301 | |
302 | cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val); |
303 | } |
304 | |
305 | static inline u8 cyy_readb(struct cyclades_port *port, u32 reg) |
306 | { |
307 | struct cyclades_card *card = port->card; |
308 | |
309 | return readb(port->u.cyy.base_addr + (reg << card->bus_index)); |
310 | } |
311 | |
312 | static inline bool cy_is_Z(struct cyclades_card *card) |
313 | { |
314 | return card->num_chips == (unsigned int)-1; |
315 | } |
316 | |
317 | static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr) |
318 | { |
319 | return readl(&ctl_addr->init_ctrl) & (1 << 17); |
320 | } |
321 | |
322 | static inline bool cyz_fpga_loaded(struct cyclades_card *card) |
323 | { |
324 | return __cyz_fpga_loaded(card->ctl_addr.p9060); |
325 | } |
326 | |
327 | static inline bool cyz_is_loaded(struct cyclades_card *card) |
328 | { |
329 | struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS; |
330 | |
331 | return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) && |
332 | readl(&fw_id->signature) == ZFIRM_ID; |
333 | } |
334 | |
335 | static inline int serial_paranoia_check(struct cyclades_port *info, |
336 | const char *name, const char *routine) |
337 | { |
338 | #ifdef SERIAL_PARANOIA_CHECK |
339 | if (!info) { |
340 | printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) " |
341 | "in %s\n", name, routine); |
342 | return 1; |
343 | } |
344 | |
345 | if (info->magic != CYCLADES_MAGIC) { |
346 | printk(KERN_WARNING "cyc Warning: bad magic number for serial " |
347 | "struct (%s) in %s\n", name, routine); |
348 | return 1; |
349 | } |
350 | #endif |
351 | return 0; |
352 | } |
353 | |
354 | /***********************************************************/ |
355 | /********* Start of block of Cyclom-Y specific code ********/ |
356 | |
357 | /* This routine waits up to 1000 micro-seconds for the previous |
358 | command to the Cirrus chip to complete and then issues the |
359 | new command. An error is returned if the previous command |
360 | didn't finish within the time limit. |
361 | |
362 | This function is only called from inside spinlock-protected code. |
363 | */ |
364 | static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index) |
365 | { |
366 | void __iomem *ccr = base_addr + (CyCCR << index); |
367 | unsigned int i; |
368 | |
369 | /* Check to see that the previous command has completed */ |
370 | for (i = 0; i < 100; i++) { |
371 | if (readb(ccr) == 0) |
372 | break; |
373 | udelay(10L); |
374 | } |
375 | /* if the CCR never cleared, the previous command |
376 | didn't finish within the "reasonable time" */ |
377 | if (i == 100) |
378 | return -1; |
379 | |
380 | /* Issue the new command */ |
381 | cy_writeb(ccr, cmd); |
382 | |
383 | return 0; |
384 | } |
385 | |
386 | static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd) |
387 | { |
388 | return __cyy_issue_cmd(port->u.cyy.base_addr, cmd, |
389 | port->card->bus_index); |
390 | } |
391 | |
392 | #ifdef CONFIG_ISA |
393 | /* ISA interrupt detection code */ |
394 | static unsigned detect_isa_irq(void __iomem *address) |
395 | { |
396 | int irq; |
397 | unsigned long irqs, flags; |
398 | int save_xir, save_car; |
399 | int index = 0; /* IRQ probing is only for ISA */ |
400 | |
401 | /* forget possible initially masked and pending IRQ */ |
402 | irq = probe_irq_off(probe_irq_on()); |
403 | |
404 | /* Clear interrupts on the board first */ |
405 | cy_writeb(address + (Cy_ClrIntr << index), 0); |
406 | /* Cy_ClrIntr is 0x1800 */ |
407 | |
408 | irqs = probe_irq_on(); |
409 | /* Wait ... */ |
410 | msleep(5); |
411 | |
412 | /* Enable the Tx interrupts on the CD1400 */ |
413 | local_irq_save(flags); |
414 | cy_writeb(address + (CyCAR << index), 0); |
415 | __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index); |
416 | |
417 | cy_writeb(address + (CyCAR << index), 0); |
418 | cy_writeb(address + (CySRER << index), |
419 | readb(address + (CySRER << index)) | CyTxRdy); |
420 | local_irq_restore(flags); |
421 | |
422 | /* Wait ... */ |
423 | msleep(5); |
424 | |
425 | /* Check which interrupt is in use */ |
426 | irq = probe_irq_off(irqs); |
427 | |
428 | /* Clean up */ |
429 | save_xir = (u_char) readb(address + (CyTIR << index)); |
430 | save_car = readb(address + (CyCAR << index)); |
431 | cy_writeb(address + (CyCAR << index), (save_xir & 0x3)); |
432 | cy_writeb(address + (CySRER << index), |
433 | readb(address + (CySRER << index)) & ~CyTxRdy); |
434 | cy_writeb(address + (CyTIR << index), (save_xir & 0x3f)); |
435 | cy_writeb(address + (CyCAR << index), (save_car)); |
436 | cy_writeb(address + (Cy_ClrIntr << index), 0); |
437 | /* Cy_ClrIntr is 0x1800 */ |
438 | |
439 | return (irq > 0) ? irq : 0; |
440 | } |
441 | #endif /* CONFIG_ISA */ |
442 | |
443 | static void cyy_chip_rx(struct cyclades_card *cinfo, int chip, |
444 | void __iomem *base_addr) |
445 | { |
446 | struct cyclades_port *info; |
447 | struct tty_struct *tty; |
448 | int len, index = cinfo->bus_index; |
449 | u8 ivr, save_xir, channel, save_car, data, char_count; |
450 | |
451 | #ifdef CY_DEBUG_INTERRUPTS |
452 | printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip); |
453 | #endif |
454 | /* determine the channel & change to that context */ |
455 | save_xir = readb(base_addr + (CyRIR << index)); |
456 | channel = save_xir & CyIRChannel; |
457 | info = &cinfo->ports[channel + chip * 4]; |
458 | save_car = cyy_readb(info, CyCAR); |
459 | cyy_writeb(info, CyCAR, save_xir); |
460 | ivr = cyy_readb(info, CyRIVR) & CyIVRMask; |
461 | |
462 | tty = tty_port_tty_get(&info->port); |
463 | /* if there is nowhere to put the data, discard it */ |
464 | if (tty == NULL) { |
465 | if (ivr == CyIVRRxEx) { /* exception */ |
466 | data = cyy_readb(info, CyRDSR); |
467 | } else { /* normal character reception */ |
468 | char_count = cyy_readb(info, CyRDCR); |
469 | while (char_count--) |
470 | data = cyy_readb(info, CyRDSR); |
471 | } |
472 | goto end; |
473 | } |
474 | /* there is an open port for this data */ |
475 | if (ivr == CyIVRRxEx) { /* exception */ |
476 | data = cyy_readb(info, CyRDSR); |
477 | |
478 | /* For statistics only */ |
479 | if (data & CyBREAK) |
480 | info->icount.brk++; |
481 | else if (data & CyFRAME) |
482 | info->icount.frame++; |
483 | else if (data & CyPARITY) |
484 | info->icount.parity++; |
485 | else if (data & CyOVERRUN) |
486 | info->icount.overrun++; |
487 | |
488 | if (data & info->ignore_status_mask) { |
489 | info->icount.rx++; |
490 | tty_kref_put(tty); |
491 | return; |
492 | } |
493 | if (tty_buffer_request_room(tty, 1)) { |
494 | if (data & info->read_status_mask) { |
495 | if (data & CyBREAK) { |
496 | tty_insert_flip_char(tty, |
497 | cyy_readb(info, CyRDSR), |
498 | TTY_BREAK); |
499 | info->icount.rx++; |
500 | if (info->port.flags & ASYNC_SAK) |
501 | do_SAK(tty); |
502 | } else if (data & CyFRAME) { |
503 | tty_insert_flip_char(tty, |
504 | cyy_readb(info, CyRDSR), |
505 | TTY_FRAME); |
506 | info->icount.rx++; |
507 | info->idle_stats.frame_errs++; |
508 | } else if (data & CyPARITY) { |
509 | /* Pieces of seven... */ |
510 | tty_insert_flip_char(tty, |
511 | cyy_readb(info, CyRDSR), |
512 | TTY_PARITY); |
513 | info->icount.rx++; |
514 | info->idle_stats.parity_errs++; |
515 | } else if (data & CyOVERRUN) { |
516 | tty_insert_flip_char(tty, 0, |
517 | TTY_OVERRUN); |
518 | info->icount.rx++; |
519 | /* If the flip buffer itself is |
520 | overflowing, we still lose |
521 | the next incoming character. |
522 | */ |
523 | tty_insert_flip_char(tty, |
524 | cyy_readb(info, CyRDSR), |
525 | TTY_FRAME); |
526 | info->icount.rx++; |
527 | info->idle_stats.overruns++; |
528 | /* These two conditions may imply */ |
529 | /* a normal read should be done. */ |
530 | /* } else if(data & CyTIMEOUT) { */ |
531 | /* } else if(data & CySPECHAR) { */ |
532 | } else { |
533 | tty_insert_flip_char(tty, 0, |
534 | TTY_NORMAL); |
535 | info->icount.rx++; |
536 | } |
537 | } else { |
538 | tty_insert_flip_char(tty, 0, TTY_NORMAL); |
539 | info->icount.rx++; |
540 | } |
541 | } else { |
542 | /* there was a software buffer overrun and nothing |
543 | * could be done about it!!! */ |
544 | info->icount.buf_overrun++; |
545 | info->idle_stats.overruns++; |
546 | } |
547 | } else { /* normal character reception */ |
548 | /* load # chars available from the chip */ |
549 | char_count = cyy_readb(info, CyRDCR); |
550 | |
551 | #ifdef CY_ENABLE_MONITORING |
552 | ++info->mon.int_count; |
553 | info->mon.char_count += char_count; |
554 | if (char_count > info->mon.char_max) |
555 | info->mon.char_max = char_count; |
556 | info->mon.char_last = char_count; |
557 | #endif |
558 | len = tty_buffer_request_room(tty, char_count); |
559 | while (len--) { |
560 | data = cyy_readb(info, CyRDSR); |
561 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
562 | info->idle_stats.recv_bytes++; |
563 | info->icount.rx++; |
564 | #ifdef CY_16Y_HACK |
565 | udelay(10L); |
566 | #endif |
567 | } |
568 | info->idle_stats.recv_idle = jiffies; |
569 | } |
570 | tty_schedule_flip(tty); |
571 | tty_kref_put(tty); |
572 | end: |
573 | /* end of service */ |
574 | cyy_writeb(info, CyRIR, save_xir & 0x3f); |
575 | cyy_writeb(info, CyCAR, save_car); |
576 | } |
577 | |
578 | static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip, |
579 | void __iomem *base_addr) |
580 | { |
581 | struct cyclades_port *info; |
582 | struct tty_struct *tty; |
583 | int char_count, index = cinfo->bus_index; |
584 | u8 save_xir, channel, save_car, outch; |
585 | |
586 | /* Since we only get here when the transmit buffer |
587 | is empty, we know we can always stuff a dozen |
588 | characters. */ |
589 | #ifdef CY_DEBUG_INTERRUPTS |
590 | printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip); |
591 | #endif |
592 | |
593 | /* determine the channel & change to that context */ |
594 | save_xir = readb(base_addr + (CyTIR << index)); |
595 | channel = save_xir & CyIRChannel; |
596 | save_car = readb(base_addr + (CyCAR << index)); |
597 | cy_writeb(base_addr + (CyCAR << index), save_xir); |
598 | |
599 | info = &cinfo->ports[channel + chip * 4]; |
600 | tty = tty_port_tty_get(&info->port); |
601 | if (tty == NULL) { |
602 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy); |
603 | goto end; |
604 | } |
605 | |
606 | /* load the on-chip space for outbound data */ |
607 | char_count = info->xmit_fifo_size; |
608 | |
609 | if (info->x_char) { /* send special char */ |
610 | outch = info->x_char; |
611 | cyy_writeb(info, CyTDR, outch); |
612 | char_count--; |
613 | info->icount.tx++; |
614 | info->x_char = 0; |
615 | } |
616 | |
617 | if (info->breakon || info->breakoff) { |
618 | if (info->breakon) { |
619 | cyy_writeb(info, CyTDR, 0); |
620 | cyy_writeb(info, CyTDR, 0x81); |
621 | info->breakon = 0; |
622 | char_count -= 2; |
623 | } |
624 | if (info->breakoff) { |
625 | cyy_writeb(info, CyTDR, 0); |
626 | cyy_writeb(info, CyTDR, 0x83); |
627 | info->breakoff = 0; |
628 | char_count -= 2; |
629 | } |
630 | } |
631 | |
632 | while (char_count-- > 0) { |
633 | if (!info->xmit_cnt) { |
634 | if (cyy_readb(info, CySRER) & CyTxMpty) { |
635 | cyy_writeb(info, CySRER, |
636 | cyy_readb(info, CySRER) & ~CyTxMpty); |
637 | } else { |
638 | cyy_writeb(info, CySRER, CyTxMpty | |
639 | (cyy_readb(info, CySRER) & ~CyTxRdy)); |
640 | } |
641 | goto done; |
642 | } |
643 | if (info->port.xmit_buf == NULL) { |
644 | cyy_writeb(info, CySRER, |
645 | cyy_readb(info, CySRER) & ~CyTxRdy); |
646 | goto done; |
647 | } |
648 | if (tty->stopped || tty->hw_stopped) { |
649 | cyy_writeb(info, CySRER, |
650 | cyy_readb(info, CySRER) & ~CyTxRdy); |
651 | goto done; |
652 | } |
653 | /* Because the Embedded Transmit Commands have been enabled, |
654 | * we must check to see if the escape character, NULL, is being |
655 | * sent. If it is, we must ensure that there is room for it to |
656 | * be doubled in the output stream. Therefore we no longer |
657 | * advance the pointer when the character is fetched, but |
658 | * rather wait until after the check for a NULL output |
659 | * character. This is necessary because there may not be room |
660 | * for the two chars needed to send a NULL.) |
661 | */ |
662 | outch = info->port.xmit_buf[info->xmit_tail]; |
663 | if (outch) { |
664 | info->xmit_cnt--; |
665 | info->xmit_tail = (info->xmit_tail + 1) & |
666 | (SERIAL_XMIT_SIZE - 1); |
667 | cyy_writeb(info, CyTDR, outch); |
668 | info->icount.tx++; |
669 | } else { |
670 | if (char_count > 1) { |
671 | info->xmit_cnt--; |
672 | info->xmit_tail = (info->xmit_tail + 1) & |
673 | (SERIAL_XMIT_SIZE - 1); |
674 | cyy_writeb(info, CyTDR, outch); |
675 | cyy_writeb(info, CyTDR, 0); |
676 | info->icount.tx++; |
677 | char_count--; |
678 | } |
679 | } |
680 | } |
681 | |
682 | done: |
683 | tty_wakeup(tty); |
684 | tty_kref_put(tty); |
685 | end: |
686 | /* end of service */ |
687 | cyy_writeb(info, CyTIR, save_xir & 0x3f); |
688 | cyy_writeb(info, CyCAR, save_car); |
689 | } |
690 | |
691 | static void cyy_chip_modem(struct cyclades_card *cinfo, int chip, |
692 | void __iomem *base_addr) |
693 | { |
694 | struct cyclades_port *info; |
695 | struct tty_struct *tty; |
696 | int index = cinfo->bus_index; |
697 | u8 save_xir, channel, save_car, mdm_change, mdm_status; |
698 | |
699 | /* determine the channel & change to that context */ |
700 | save_xir = readb(base_addr + (CyMIR << index)); |
701 | channel = save_xir & CyIRChannel; |
702 | info = &cinfo->ports[channel + chip * 4]; |
703 | save_car = cyy_readb(info, CyCAR); |
704 | cyy_writeb(info, CyCAR, save_xir); |
705 | |
706 | mdm_change = cyy_readb(info, CyMISR); |
707 | mdm_status = cyy_readb(info, CyMSVR1); |
708 | |
709 | tty = tty_port_tty_get(&info->port); |
710 | if (!tty) |
711 | goto end; |
712 | |
713 | if (mdm_change & CyANY_DELTA) { |
714 | /* For statistics only */ |
715 | if (mdm_change & CyDCD) |
716 | info->icount.dcd++; |
717 | if (mdm_change & CyCTS) |
718 | info->icount.cts++; |
719 | if (mdm_change & CyDSR) |
720 | info->icount.dsr++; |
721 | if (mdm_change & CyRI) |
722 | info->icount.rng++; |
723 | |
724 | wake_up_interruptible(&info->port.delta_msr_wait); |
725 | } |
726 | |
727 | if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) { |
728 | if (mdm_status & CyDCD) |
729 | wake_up_interruptible(&info->port.open_wait); |
730 | else |
731 | tty_hangup(tty); |
732 | } |
733 | if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) { |
734 | if (tty->hw_stopped) { |
735 | if (mdm_status & CyCTS) { |
736 | /* cy_start isn't used |
737 | because... !!! */ |
738 | tty->hw_stopped = 0; |
739 | cyy_writeb(info, CySRER, |
740 | cyy_readb(info, CySRER) | CyTxRdy); |
741 | tty_wakeup(tty); |
742 | } |
743 | } else { |
744 | if (!(mdm_status & CyCTS)) { |
745 | /* cy_stop isn't used |
746 | because ... !!! */ |
747 | tty->hw_stopped = 1; |
748 | cyy_writeb(info, CySRER, |
749 | cyy_readb(info, CySRER) & ~CyTxRdy); |
750 | } |
751 | } |
752 | } |
753 | /* if (mdm_change & CyDSR) { |
754 | } |
755 | if (mdm_change & CyRI) { |
756 | }*/ |
757 | tty_kref_put(tty); |
758 | end: |
759 | /* end of service */ |
760 | cyy_writeb(info, CyMIR, save_xir & 0x3f); |
761 | cyy_writeb(info, CyCAR, save_car); |
762 | } |
763 | |
764 | /* The real interrupt service routine is called |
765 | whenever the card wants its hand held--chars |
766 | received, out buffer empty, modem change, etc. |
767 | */ |
768 | static irqreturn_t cyy_interrupt(int irq, void *dev_id) |
769 | { |
770 | int status; |
771 | struct cyclades_card *cinfo = dev_id; |
772 | void __iomem *base_addr, *card_base_addr; |
773 | unsigned int chip, too_many, had_work; |
774 | int index; |
775 | |
776 | if (unlikely(cinfo == NULL)) { |
777 | #ifdef CY_DEBUG_INTERRUPTS |
778 | printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n", |
779 | irq); |
780 | #endif |
781 | return IRQ_NONE; /* spurious interrupt */ |
782 | } |
783 | |
784 | card_base_addr = cinfo->base_addr; |
785 | index = cinfo->bus_index; |
786 | |
787 | /* card was not initialized yet (e.g. DEBUG_SHIRQ) */ |
788 | if (unlikely(card_base_addr == NULL)) |
789 | return IRQ_HANDLED; |
790 | |
791 | /* This loop checks all chips in the card. Make a note whenever |
792 | _any_ chip had some work to do, as this is considered an |
793 | indication that there will be more to do. Only when no chip |
794 | has any work does this outermost loop exit. |
795 | */ |
796 | do { |
797 | had_work = 0; |
798 | for (chip = 0; chip < cinfo->num_chips; chip++) { |
799 | base_addr = cinfo->base_addr + |
800 | (cy_chip_offset[chip] << index); |
801 | too_many = 0; |
802 | while ((status = readb(base_addr + |
803 | (CySVRR << index))) != 0x00) { |
804 | had_work++; |
805 | /* The purpose of the following test is to ensure that |
806 | no chip can monopolize the driver. This forces the |
807 | chips to be checked in a round-robin fashion (after |
808 | draining each of a bunch (1000) of characters). |
809 | */ |
810 | if (1000 < too_many++) |
811 | break; |
812 | spin_lock(&cinfo->card_lock); |
813 | if (status & CySRReceive) /* rx intr */ |
814 | cyy_chip_rx(cinfo, chip, base_addr); |
815 | if (status & CySRTransmit) /* tx intr */ |
816 | cyy_chip_tx(cinfo, chip, base_addr); |
817 | if (status & CySRModem) /* modem intr */ |
818 | cyy_chip_modem(cinfo, chip, base_addr); |
819 | spin_unlock(&cinfo->card_lock); |
820 | } |
821 | } |
822 | } while (had_work); |
823 | |
824 | /* clear interrupts */ |
825 | spin_lock(&cinfo->card_lock); |
826 | cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0); |
827 | /* Cy_ClrIntr is 0x1800 */ |
828 | spin_unlock(&cinfo->card_lock); |
829 | return IRQ_HANDLED; |
830 | } /* cyy_interrupt */ |
831 | |
832 | static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set, |
833 | unsigned int clear) |
834 | { |
835 | struct cyclades_card *card = info->card; |
836 | int channel = info->line - card->first_line; |
837 | u32 rts, dtr, msvrr, msvrd; |
838 | |
839 | channel &= 0x03; |
840 | |
841 | if (info->rtsdtr_inv) { |
842 | msvrr = CyMSVR2; |
843 | msvrd = CyMSVR1; |
844 | rts = CyDTR; |
845 | dtr = CyRTS; |
846 | } else { |
847 | msvrr = CyMSVR1; |
848 | msvrd = CyMSVR2; |
849 | rts = CyRTS; |
850 | dtr = CyDTR; |
851 | } |
852 | if (set & TIOCM_RTS) { |
853 | cyy_writeb(info, CyCAR, channel); |
854 | cyy_writeb(info, msvrr, rts); |
855 | } |
856 | if (clear & TIOCM_RTS) { |
857 | cyy_writeb(info, CyCAR, channel); |
858 | cyy_writeb(info, msvrr, ~rts); |
859 | } |
860 | if (set & TIOCM_DTR) { |
861 | cyy_writeb(info, CyCAR, channel); |
862 | cyy_writeb(info, msvrd, dtr); |
863 | #ifdef CY_DEBUG_DTR |
864 | printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n"); |
865 | printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
866 | cyy_readb(info, CyMSVR1), |
867 | cyy_readb(info, CyMSVR2)); |
868 | #endif |
869 | } |
870 | if (clear & TIOCM_DTR) { |
871 | cyy_writeb(info, CyCAR, channel); |
872 | cyy_writeb(info, msvrd, ~dtr); |
873 | #ifdef CY_DEBUG_DTR |
874 | printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n"); |
875 | printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
876 | cyy_readb(info, CyMSVR1), |
877 | cyy_readb(info, CyMSVR2)); |
878 | #endif |
879 | } |
880 | } |
881 | |
882 | /***********************************************************/ |
883 | /********* End of block of Cyclom-Y specific code **********/ |
884 | /******** Start of block of Cyclades-Z specific code *******/ |
885 | /***********************************************************/ |
886 | |
887 | static int |
888 | cyz_fetch_msg(struct cyclades_card *cinfo, |
889 | __u32 *channel, __u8 *cmd, __u32 *param) |
890 | { |
891 | struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl; |
892 | unsigned long loc_doorbell; |
893 | |
894 | loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell); |
895 | if (loc_doorbell) { |
896 | *cmd = (char)(0xff & loc_doorbell); |
897 | *channel = readl(&board_ctrl->fwcmd_channel); |
898 | *param = (__u32) readl(&board_ctrl->fwcmd_param); |
899 | cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff); |
900 | return 1; |
901 | } |
902 | return 0; |
903 | } /* cyz_fetch_msg */ |
904 | |
905 | static int |
906 | cyz_issue_cmd(struct cyclades_card *cinfo, |
907 | __u32 channel, __u8 cmd, __u32 param) |
908 | { |
909 | struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl; |
910 | __u32 __iomem *pci_doorbell; |
911 | unsigned int index; |
912 | |
913 | if (!cyz_is_loaded(cinfo)) |
914 | return -1; |
915 | |
916 | index = 0; |
917 | pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell; |
918 | while ((readl(pci_doorbell) & 0xff) != 0) { |
919 | if (index++ == 1000) |
920 | return (int)(readl(pci_doorbell) & 0xff); |
921 | udelay(50L); |
922 | } |
923 | cy_writel(&board_ctrl->hcmd_channel, channel); |
924 | cy_writel(&board_ctrl->hcmd_param, param); |
925 | cy_writel(pci_doorbell, (long)cmd); |
926 | |
927 | return 0; |
928 | } /* cyz_issue_cmd */ |
929 | |
930 | static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty) |
931 | { |
932 | struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl; |
933 | struct cyclades_card *cinfo = info->card; |
934 | unsigned int char_count; |
935 | int len; |
936 | #ifdef BLOCKMOVE |
937 | unsigned char *buf; |
938 | #else |
939 | char data; |
940 | #endif |
941 | __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr; |
942 | |
943 | rx_get = new_rx_get = readl(&buf_ctrl->rx_get); |
944 | rx_put = readl(&buf_ctrl->rx_put); |
945 | rx_bufsize = readl(&buf_ctrl->rx_bufsize); |
946 | rx_bufaddr = readl(&buf_ctrl->rx_bufaddr); |
947 | if (rx_put >= rx_get) |
948 | char_count = rx_put - rx_get; |
949 | else |
950 | char_count = rx_put - rx_get + rx_bufsize; |
951 | |
952 | if (char_count) { |
953 | #ifdef CY_ENABLE_MONITORING |
954 | info->mon.int_count++; |
955 | info->mon.char_count += char_count; |
956 | if (char_count > info->mon.char_max) |
957 | info->mon.char_max = char_count; |
958 | info->mon.char_last = char_count; |
959 | #endif |
960 | if (tty == NULL) { |
961 | /* flush received characters */ |
962 | new_rx_get = (new_rx_get + char_count) & |
963 | (rx_bufsize - 1); |
964 | info->rflush_count++; |
965 | } else { |
966 | #ifdef BLOCKMOVE |
967 | /* we'd like to use memcpy(t, f, n) and memset(s, c, count) |
968 | for performance, but because of buffer boundaries, there |
969 | may be several steps to the operation */ |
970 | while (1) { |
971 | len = tty_prepare_flip_string(tty, &buf, |
972 | char_count); |
973 | if (!len) |
974 | break; |
975 | |
976 | len = min_t(unsigned int, min(len, char_count), |
977 | rx_bufsize - new_rx_get); |
978 | |
979 | memcpy_fromio(buf, cinfo->base_addr + |
980 | rx_bufaddr + new_rx_get, len); |
981 | |
982 | new_rx_get = (new_rx_get + len) & |
983 | (rx_bufsize - 1); |
984 | char_count -= len; |
985 | info->icount.rx += len; |
986 | info->idle_stats.recv_bytes += len; |
987 | } |
988 | #else |
989 | len = tty_buffer_request_room(tty, char_count); |
990 | while (len--) { |
991 | data = readb(cinfo->base_addr + rx_bufaddr + |
992 | new_rx_get); |
993 | new_rx_get = (new_rx_get + 1) & |
994 | (rx_bufsize - 1); |
995 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
996 | info->idle_stats.recv_bytes++; |
997 | info->icount.rx++; |
998 | } |
999 | #endif |
1000 | #ifdef CONFIG_CYZ_INTR |
1001 | /* Recalculate the number of chars in the RX buffer and issue |
1002 | a cmd in case it's higher than the RX high water mark */ |
1003 | rx_put = readl(&buf_ctrl->rx_put); |
1004 | if (rx_put >= rx_get) |
1005 | char_count = rx_put - rx_get; |
1006 | else |
1007 | char_count = rx_put - rx_get + rx_bufsize; |
1008 | if (char_count >= readl(&buf_ctrl->rx_threshold) && |
1009 | !timer_pending(&cyz_rx_full_timer[ |
1010 | info->line])) |
1011 | mod_timer(&cyz_rx_full_timer[info->line], |
1012 | jiffies + 1); |
1013 | #endif |
1014 | info->idle_stats.recv_idle = jiffies; |
1015 | tty_schedule_flip(tty); |
1016 | } |
1017 | /* Update rx_get */ |
1018 | cy_writel(&buf_ctrl->rx_get, new_rx_get); |
1019 | } |
1020 | } |
1021 | |
1022 | static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty) |
1023 | { |
1024 | struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl; |
1025 | struct cyclades_card *cinfo = info->card; |
1026 | u8 data; |
1027 | unsigned int char_count; |
1028 | #ifdef BLOCKMOVE |
1029 | int small_count; |
1030 | #endif |
1031 | __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr; |
1032 | |
1033 | if (info->xmit_cnt <= 0) /* Nothing to transmit */ |
1034 | return; |
1035 | |
1036 | tx_get = readl(&buf_ctrl->tx_get); |
1037 | tx_put = readl(&buf_ctrl->tx_put); |
1038 | tx_bufsize = readl(&buf_ctrl->tx_bufsize); |
1039 | tx_bufaddr = readl(&buf_ctrl->tx_bufaddr); |
1040 | if (tx_put >= tx_get) |
1041 | char_count = tx_get - tx_put - 1 + tx_bufsize; |
1042 | else |
1043 | char_count = tx_get - tx_put - 1; |
1044 | |
1045 | if (char_count) { |
1046 | |
1047 | if (tty == NULL) |
1048 | goto ztxdone; |
1049 | |
1050 | if (info->x_char) { /* send special char */ |
1051 | data = info->x_char; |
1052 | |
1053 | cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
1054 | tx_put = (tx_put + 1) & (tx_bufsize - 1); |
1055 | info->x_char = 0; |
1056 | char_count--; |
1057 | info->icount.tx++; |
1058 | } |
1059 | #ifdef BLOCKMOVE |
1060 | while (0 < (small_count = min_t(unsigned int, |
1061 | tx_bufsize - tx_put, min_t(unsigned int, |
1062 | (SERIAL_XMIT_SIZE - info->xmit_tail), |
1063 | min_t(unsigned int, info->xmit_cnt, |
1064 | char_count))))) { |
1065 | |
1066 | memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + |
1067 | tx_put), |
1068 | &info->port.xmit_buf[info->xmit_tail], |
1069 | small_count); |
1070 | |
1071 | tx_put = (tx_put + small_count) & (tx_bufsize - 1); |
1072 | char_count -= small_count; |
1073 | info->icount.tx += small_count; |
1074 | info->xmit_cnt -= small_count; |
1075 | info->xmit_tail = (info->xmit_tail + small_count) & |
1076 | (SERIAL_XMIT_SIZE - 1); |
1077 | } |
1078 | #else |
1079 | while (info->xmit_cnt && char_count) { |
1080 | data = info->port.xmit_buf[info->xmit_tail]; |
1081 | info->xmit_cnt--; |
1082 | info->xmit_tail = (info->xmit_tail + 1) & |
1083 | (SERIAL_XMIT_SIZE - 1); |
1084 | |
1085 | cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
1086 | tx_put = (tx_put + 1) & (tx_bufsize - 1); |
1087 | char_count--; |
1088 | info->icount.tx++; |
1089 | } |
1090 | #endif |
1091 | tty_wakeup(tty); |
1092 | ztxdone: |
1093 | /* Update tx_put */ |
1094 | cy_writel(&buf_ctrl->tx_put, tx_put); |
1095 | } |
1096 | } |
1097 | |
1098 | static void cyz_handle_cmd(struct cyclades_card *cinfo) |
1099 | { |
1100 | struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl; |
1101 | struct tty_struct *tty; |
1102 | struct cyclades_port *info; |
1103 | __u32 channel, param, fw_ver; |
1104 | __u8 cmd; |
1105 | int special_count; |
1106 | int delta_count; |
1107 | |
1108 | fw_ver = readl(&board_ctrl->fw_version); |
1109 | |
1110 | while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) { |
1111 | special_count = 0; |
1112 | delta_count = 0; |
1113 | info = &cinfo->ports[channel]; |
1114 | tty = tty_port_tty_get(&info->port); |
1115 | if (tty == NULL) |
1116 | continue; |
1117 | |
1118 | switch (cmd) { |
1119 | case C_CM_PR_ERROR: |
1120 | tty_insert_flip_char(tty, 0, TTY_PARITY); |
1121 | info->icount.rx++; |
1122 | special_count++; |
1123 | break; |
1124 | case C_CM_FR_ERROR: |
1125 | tty_insert_flip_char(tty, 0, TTY_FRAME); |
1126 | info->icount.rx++; |
1127 | special_count++; |
1128 | break; |
1129 | case C_CM_RXBRK: |
1130 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
1131 | info->icount.rx++; |
1132 | special_count++; |
1133 | break; |
1134 | case C_CM_MDCD: |
1135 | info->icount.dcd++; |
1136 | delta_count++; |
1137 | if (info->port.flags & ASYNC_CHECK_CD) { |
1138 | u32 dcd = fw_ver > 241 ? param : |
1139 | readl(&info->u.cyz.ch_ctrl->rs_status); |
1140 | if (dcd & C_RS_DCD) |
1141 | wake_up_interruptible(&info->port.open_wait); |
1142 | else |
1143 | tty_hangup(tty); |
1144 | } |
1145 | break; |
1146 | case C_CM_MCTS: |
1147 | info->icount.cts++; |
1148 | delta_count++; |
1149 | break; |
1150 | case C_CM_MRI: |
1151 | info->icount.rng++; |
1152 | delta_count++; |
1153 | break; |
1154 | case C_CM_MDSR: |
1155 | info->icount.dsr++; |
1156 | delta_count++; |
1157 | break; |
1158 | #ifdef Z_WAKE |
1159 | case C_CM_IOCTLW: |
1160 | complete(&info->shutdown_wait); |
1161 | break; |
1162 | #endif |
1163 | #ifdef CONFIG_CYZ_INTR |
1164 | case C_CM_RXHIWM: |
1165 | case C_CM_RXNNDT: |
1166 | case C_CM_INTBACK2: |
1167 | /* Reception Interrupt */ |
1168 | #ifdef CY_DEBUG_INTERRUPTS |
1169 | printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, " |
1170 | "port %ld\n", info->card, channel); |
1171 | #endif |
1172 | cyz_handle_rx(info, tty); |
1173 | break; |
1174 | case C_CM_TXBEMPTY: |
1175 | case C_CM_TXLOWWM: |
1176 | case C_CM_INTBACK: |
1177 | /* Transmission Interrupt */ |
1178 | #ifdef CY_DEBUG_INTERRUPTS |
1179 | printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, " |
1180 | "port %ld\n", info->card, channel); |
1181 | #endif |
1182 | cyz_handle_tx(info, tty); |
1183 | break; |
1184 | #endif /* CONFIG_CYZ_INTR */ |
1185 | case C_CM_FATAL: |
1186 | /* should do something with this !!! */ |
1187 | break; |
1188 | default: |
1189 | break; |
1190 | } |
1191 | if (delta_count) |
1192 | wake_up_interruptible(&info->port.delta_msr_wait); |
1193 | if (special_count) |
1194 | tty_schedule_flip(tty); |
1195 | tty_kref_put(tty); |
1196 | } |
1197 | } |
1198 | |
1199 | #ifdef CONFIG_CYZ_INTR |
1200 | static irqreturn_t cyz_interrupt(int irq, void *dev_id) |
1201 | { |
1202 | struct cyclades_card *cinfo = dev_id; |
1203 | |
1204 | if (unlikely(!cyz_is_loaded(cinfo))) { |
1205 | #ifdef CY_DEBUG_INTERRUPTS |
1206 | printk(KERN_DEBUG "cyz_interrupt: board not yet loaded " |
1207 | "(IRQ%d).\n", irq); |
1208 | #endif |
1209 | return IRQ_NONE; |
1210 | } |
1211 | |
1212 | /* Handle the interrupts */ |
1213 | cyz_handle_cmd(cinfo); |
1214 | |
1215 | return IRQ_HANDLED; |
1216 | } /* cyz_interrupt */ |
1217 | |
1218 | static void cyz_rx_restart(unsigned long arg) |
1219 | { |
1220 | struct cyclades_port *info = (struct cyclades_port *)arg; |
1221 | struct cyclades_card *card = info->card; |
1222 | int retval; |
1223 | __u32 channel = info->line - card->first_line; |
1224 | unsigned long flags; |
1225 | |
1226 | spin_lock_irqsave(&card->card_lock, flags); |
1227 | retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L); |
1228 | if (retval != 0) { |
1229 | printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n", |
1230 | info->line, retval); |
1231 | } |
1232 | spin_unlock_irqrestore(&card->card_lock, flags); |
1233 | } |
1234 | |
1235 | #else /* CONFIG_CYZ_INTR */ |
1236 | |
1237 | static void cyz_poll(unsigned long arg) |
1238 | { |
1239 | struct cyclades_card *cinfo; |
1240 | struct cyclades_port *info; |
1241 | unsigned long expires = jiffies + HZ; |
1242 | unsigned int port, card; |
1243 | |
1244 | for (card = 0; card < NR_CARDS; card++) { |
1245 | cinfo = &cy_card[card]; |
1246 | |
1247 | if (!cy_is_Z(cinfo)) |
1248 | continue; |
1249 | if (!cyz_is_loaded(cinfo)) |
1250 | continue; |
1251 | |
1252 | /* Skip first polling cycle to avoid racing conditions with the FW */ |
1253 | if (!cinfo->intr_enabled) { |
1254 | cinfo->intr_enabled = 1; |
1255 | continue; |
1256 | } |
1257 | |
1258 | cyz_handle_cmd(cinfo); |
1259 | |
1260 | for (port = 0; port < cinfo->nports; port++) { |
1261 | struct tty_struct *tty; |
1262 | |
1263 | info = &cinfo->ports[port]; |
1264 | tty = tty_port_tty_get(&info->port); |
1265 | /* OK to pass NULL to the handle functions below. |
1266 | They need to drop the data in that case. */ |
1267 | |
1268 | if (!info->throttle) |
1269 | cyz_handle_rx(info, tty); |
1270 | cyz_handle_tx(info, tty); |
1271 | tty_kref_put(tty); |
1272 | } |
1273 | /* poll every 'cyz_polling_cycle' period */ |
1274 | expires = jiffies + cyz_polling_cycle; |
1275 | } |
1276 | mod_timer(&cyz_timerlist, expires); |
1277 | } /* cyz_poll */ |
1278 | |
1279 | #endif /* CONFIG_CYZ_INTR */ |
1280 | |
1281 | /********** End of block of Cyclades-Z specific code *********/ |
1282 | /***********************************************************/ |
1283 | |
1284 | /* This is called whenever a port becomes active; |
1285 | interrupts are enabled and DTR & RTS are turned on. |
1286 | */ |
1287 | static int cy_startup(struct cyclades_port *info, struct tty_struct *tty) |
1288 | { |
1289 | struct cyclades_card *card; |
1290 | unsigned long flags; |
1291 | int retval = 0; |
1292 | int channel; |
1293 | unsigned long page; |
1294 | |
1295 | card = info->card; |
1296 | channel = info->line - card->first_line; |
1297 | |
1298 | page = get_zeroed_page(GFP_KERNEL); |
1299 | if (!page) |
1300 | return -ENOMEM; |
1301 | |
1302 | spin_lock_irqsave(&card->card_lock, flags); |
1303 | |
1304 | if (info->port.flags & ASYNC_INITIALIZED) |
1305 | goto errout; |
1306 | |
1307 | if (!info->type) { |
1308 | set_bit(TTY_IO_ERROR, &tty->flags); |
1309 | goto errout; |
1310 | } |
1311 | |
1312 | if (info->port.xmit_buf) |
1313 | free_page(page); |
1314 | else |
1315 | info->port.xmit_buf = (unsigned char *)page; |
1316 | |
1317 | spin_unlock_irqrestore(&card->card_lock, flags); |
1318 | |
1319 | cy_set_line_char(info, tty); |
1320 | |
1321 | if (!cy_is_Z(card)) { |
1322 | channel &= 0x03; |
1323 | |
1324 | spin_lock_irqsave(&card->card_lock, flags); |
1325 | |
1326 | cyy_writeb(info, CyCAR, channel); |
1327 | |
1328 | cyy_writeb(info, CyRTPR, |
1329 | (info->default_timeout ? info->default_timeout : 0x02)); |
1330 | /* 10ms rx timeout */ |
1331 | |
1332 | cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR); |
1333 | |
1334 | cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0); |
1335 | |
1336 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData); |
1337 | } else { |
1338 | struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl; |
1339 | |
1340 | if (!cyz_is_loaded(card)) |
1341 | return -ENODEV; |
1342 | |
1343 | #ifdef CY_DEBUG_OPEN |
1344 | printk(KERN_DEBUG "cyc startup Z card %d, channel %d, " |
1345 | "base_addr %p\n", card, channel, card->base_addr); |
1346 | #endif |
1347 | spin_lock_irqsave(&card->card_lock, flags); |
1348 | |
1349 | cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE); |
1350 | #ifdef Z_WAKE |
1351 | #ifdef CONFIG_CYZ_INTR |
1352 | cy_writel(&ch_ctrl->intr_enable, |
1353 | C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | |
1354 | C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD); |
1355 | #else |
1356 | cy_writel(&ch_ctrl->intr_enable, |
1357 | C_IN_IOCTLW | C_IN_MDCD); |
1358 | #endif /* CONFIG_CYZ_INTR */ |
1359 | #else |
1360 | #ifdef CONFIG_CYZ_INTR |
1361 | cy_writel(&ch_ctrl->intr_enable, |
1362 | C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | |
1363 | C_IN_RXNNDT | C_IN_MDCD); |
1364 | #else |
1365 | cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD); |
1366 | #endif /* CONFIG_CYZ_INTR */ |
1367 | #endif /* Z_WAKE */ |
1368 | |
1369 | retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); |
1370 | if (retval != 0) { |
1371 | printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was " |
1372 | "%x\n", info->line, retval); |
1373 | } |
1374 | |
1375 | /* Flush RX buffers before raising DTR and RTS */ |
1376 | retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L); |
1377 | if (retval != 0) { |
1378 | printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was " |
1379 | "%x\n", info->line, retval); |
1380 | } |
1381 | |
1382 | /* set timeout !!! */ |
1383 | /* set RTS and DTR !!! */ |
1384 | tty_port_raise_dtr_rts(&info->port); |
1385 | |
1386 | /* enable send, recv, modem !!! */ |
1387 | } |
1388 | |
1389 | info->port.flags |= ASYNC_INITIALIZED; |
1390 | |
1391 | clear_bit(TTY_IO_ERROR, &tty->flags); |
1392 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
1393 | info->breakon = info->breakoff = 0; |
1394 | memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); |
1395 | info->idle_stats.in_use = |
1396 | info->idle_stats.recv_idle = |
1397 | info->idle_stats.xmit_idle = jiffies; |
1398 | |
1399 | spin_unlock_irqrestore(&card->card_lock, flags); |
1400 | |
1401 | #ifdef CY_DEBUG_OPEN |
1402 | printk(KERN_DEBUG "cyc startup done\n"); |
1403 | #endif |
1404 | return 0; |
1405 | |
1406 | errout: |
1407 | spin_unlock_irqrestore(&card->card_lock, flags); |
1408 | free_page(page); |
1409 | return retval; |
1410 | } /* startup */ |
1411 | |
1412 | static void start_xmit(struct cyclades_port *info) |
1413 | { |
1414 | struct cyclades_card *card = info->card; |
1415 | unsigned long flags; |
1416 | int channel = info->line - card->first_line; |
1417 | |
1418 | if (!cy_is_Z(card)) { |
1419 | spin_lock_irqsave(&card->card_lock, flags); |
1420 | cyy_writeb(info, CyCAR, channel & 0x03); |
1421 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy); |
1422 | spin_unlock_irqrestore(&card->card_lock, flags); |
1423 | } else { |
1424 | #ifdef CONFIG_CYZ_INTR |
1425 | int retval; |
1426 | |
1427 | spin_lock_irqsave(&card->card_lock, flags); |
1428 | retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L); |
1429 | if (retval != 0) { |
1430 | printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was " |
1431 | "%x\n", info->line, retval); |
1432 | } |
1433 | spin_unlock_irqrestore(&card->card_lock, flags); |
1434 | #else /* CONFIG_CYZ_INTR */ |
1435 | /* Don't have to do anything at this time */ |
1436 | #endif /* CONFIG_CYZ_INTR */ |
1437 | } |
1438 | } /* start_xmit */ |
1439 | |
1440 | /* |
1441 | * This routine shuts down a serial port; interrupts are disabled, |
1442 | * and DTR is dropped if the hangup on close termio flag is on. |
1443 | */ |
1444 | static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty) |
1445 | { |
1446 | struct cyclades_card *card; |
1447 | unsigned long flags; |
1448 | int channel; |
1449 | |
1450 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
1451 | return; |
1452 | |
1453 | card = info->card; |
1454 | channel = info->line - card->first_line; |
1455 | if (!cy_is_Z(card)) { |
1456 | spin_lock_irqsave(&card->card_lock, flags); |
1457 | |
1458 | /* Clear delta_msr_wait queue to avoid mem leaks. */ |
1459 | wake_up_interruptible(&info->port.delta_msr_wait); |
1460 | |
1461 | if (info->port.xmit_buf) { |
1462 | unsigned char *temp; |
1463 | temp = info->port.xmit_buf; |
1464 | info->port.xmit_buf = NULL; |
1465 | free_page((unsigned long)temp); |
1466 | } |
1467 | if (tty->termios->c_cflag & HUPCL) |
1468 | cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR); |
1469 | |
1470 | cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR); |
1471 | /* it may be appropriate to clear _XMIT at |
1472 | some later date (after testing)!!! */ |
1473 | |
1474 | set_bit(TTY_IO_ERROR, &tty->flags); |
1475 | info->port.flags &= ~ASYNC_INITIALIZED; |
1476 | spin_unlock_irqrestore(&card->card_lock, flags); |
1477 | } else { |
1478 | #ifdef CY_DEBUG_OPEN |
1479 | printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, " |
1480 | "base_addr %p\n", card, channel, card->base_addr); |
1481 | #endif |
1482 | |
1483 | if (!cyz_is_loaded(card)) |
1484 | return; |
1485 | |
1486 | spin_lock_irqsave(&card->card_lock, flags); |
1487 | |
1488 | if (info->port.xmit_buf) { |
1489 | unsigned char *temp; |
1490 | temp = info->port.xmit_buf; |
1491 | info->port.xmit_buf = NULL; |
1492 | free_page((unsigned long)temp); |
1493 | } |
1494 | |
1495 | if (tty->termios->c_cflag & HUPCL) |
1496 | tty_port_lower_dtr_rts(&info->port); |
1497 | |
1498 | set_bit(TTY_IO_ERROR, &tty->flags); |
1499 | info->port.flags &= ~ASYNC_INITIALIZED; |
1500 | |
1501 | spin_unlock_irqrestore(&card->card_lock, flags); |
1502 | } |
1503 | |
1504 | #ifdef CY_DEBUG_OPEN |
1505 | printk(KERN_DEBUG "cyc shutdown done\n"); |
1506 | #endif |
1507 | } /* shutdown */ |
1508 | |
1509 | /* |
1510 | * ------------------------------------------------------------ |
1511 | * cy_open() and friends |
1512 | * ------------------------------------------------------------ |
1513 | */ |
1514 | |
1515 | /* |
1516 | * This routine is called whenever a serial port is opened. It |
1517 | * performs the serial-specific initialization for the tty structure. |
1518 | */ |
1519 | static int cy_open(struct tty_struct *tty, struct file *filp) |
1520 | { |
1521 | struct cyclades_port *info; |
1522 | unsigned int i, line; |
1523 | int retval; |
1524 | |
1525 | line = tty->index; |
1526 | if (tty->index < 0 || NR_PORTS <= line) |
1527 | return -ENODEV; |
1528 | |
1529 | for (i = 0; i < NR_CARDS; i++) |
1530 | if (line < cy_card[i].first_line + cy_card[i].nports && |
1531 | line >= cy_card[i].first_line) |
1532 | break; |
1533 | if (i >= NR_CARDS) |
1534 | return -ENODEV; |
1535 | info = &cy_card[i].ports[line - cy_card[i].first_line]; |
1536 | if (info->line < 0) |
1537 | return -ENODEV; |
1538 | |
1539 | /* If the card's firmware hasn't been loaded, |
1540 | treat it as absent from the system. This |
1541 | will make the user pay attention. |
1542 | */ |
1543 | if (cy_is_Z(info->card)) { |
1544 | struct cyclades_card *cinfo = info->card; |
1545 | struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS; |
1546 | |
1547 | if (!cyz_is_loaded(cinfo)) { |
1548 | if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) && |
1549 | readl(&firm_id->signature) == |
1550 | ZFIRM_HLT) { |
1551 | printk(KERN_ERR "cyc:Cyclades-Z Error: you " |
1552 | "need an external power supply for " |
1553 | "this number of ports.\nFirmware " |
1554 | "halted.\n"); |
1555 | } else { |
1556 | printk(KERN_ERR "cyc:Cyclades-Z firmware not " |
1557 | "yet loaded\n"); |
1558 | } |
1559 | return -ENODEV; |
1560 | } |
1561 | #ifdef CONFIG_CYZ_INTR |
1562 | else { |
1563 | /* In case this Z board is operating in interrupt mode, its |
1564 | interrupts should be enabled as soon as the first open |
1565 | happens to one of its ports. */ |
1566 | if (!cinfo->intr_enabled) { |
1567 | u16 intr; |
1568 | |
1569 | /* Enable interrupts on the PLX chip */ |
1570 | intr = readw(&cinfo->ctl_addr.p9060-> |
1571 | intr_ctrl_stat) | 0x0900; |
1572 | cy_writew(&cinfo->ctl_addr.p9060-> |
1573 | intr_ctrl_stat, intr); |
1574 | /* Enable interrupts on the FW */ |
1575 | retval = cyz_issue_cmd(cinfo, 0, |
1576 | C_CM_IRQ_ENBL, 0L); |
1577 | if (retval != 0) { |
1578 | printk(KERN_ERR "cyc:IRQ enable retval " |
1579 | "was %x\n", retval); |
1580 | } |
1581 | cinfo->intr_enabled = 1; |
1582 | } |
1583 | } |
1584 | #endif /* CONFIG_CYZ_INTR */ |
1585 | /* Make sure this Z port really exists in hardware */ |
1586 | if (info->line > (cinfo->first_line + cinfo->nports - 1)) |
1587 | return -ENODEV; |
1588 | } |
1589 | #ifdef CY_DEBUG_OTHER |
1590 | printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line); |
1591 | #endif |
1592 | tty->driver_data = info; |
1593 | if (serial_paranoia_check(info, tty->name, "cy_open")) |
1594 | return -ENODEV; |
1595 | |
1596 | #ifdef CY_DEBUG_OPEN |
1597 | printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line, |
1598 | info->port.count); |
1599 | #endif |
1600 | info->port.count++; |
1601 | #ifdef CY_DEBUG_COUNT |
1602 | printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n", |
1603 | current->pid, info->port.count); |
1604 | #endif |
1605 | |
1606 | /* |
1607 | * If the port is the middle of closing, bail out now |
1608 | */ |
1609 | if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { |
1610 | wait_event_interruptible_tty(info->port.close_wait, |
1611 | !(info->port.flags & ASYNC_CLOSING)); |
1612 | return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; |
1613 | } |
1614 | |
1615 | /* |
1616 | * Start up serial port |
1617 | */ |
1618 | retval = cy_startup(info, tty); |
1619 | if (retval) |
1620 | return retval; |
1621 | |
1622 | retval = tty_port_block_til_ready(&info->port, tty, filp); |
1623 | if (retval) { |
1624 | #ifdef CY_DEBUG_OPEN |
1625 | printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready " |
1626 | "with %d\n", retval); |
1627 | #endif |
1628 | return retval; |
1629 | } |
1630 | |
1631 | info->throttle = 0; |
1632 | tty_port_tty_set(&info->port, tty); |
1633 | |
1634 | #ifdef CY_DEBUG_OPEN |
1635 | printk(KERN_DEBUG "cyc:cy_open done\n"); |
1636 | #endif |
1637 | return 0; |
1638 | } /* cy_open */ |
1639 | |
1640 | /* |
1641 | * cy_wait_until_sent() --- wait until the transmitter is empty |
1642 | */ |
1643 | static void cy_wait_until_sent(struct tty_struct *tty, int timeout) |
1644 | { |
1645 | struct cyclades_card *card; |
1646 | struct cyclades_port *info = tty->driver_data; |
1647 | unsigned long orig_jiffies; |
1648 | int char_time; |
1649 | |
1650 | if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent")) |
1651 | return; |
1652 | |
1653 | if (info->xmit_fifo_size == 0) |
1654 | return; /* Just in case.... */ |
1655 | |
1656 | orig_jiffies = jiffies; |
1657 | /* |
1658 | * Set the check interval to be 1/5 of the estimated time to |
1659 | * send a single character, and make it at least 1. The check |
1660 | * interval should also be less than the timeout. |
1661 | * |
1662 | * Note: we have to use pretty tight timings here to satisfy |
1663 | * the NIST-PCTS. |
1664 | */ |
1665 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; |
1666 | char_time = char_time / 5; |
1667 | if (char_time <= 0) |
1668 | char_time = 1; |
1669 | if (timeout < 0) |
1670 | timeout = 0; |
1671 | if (timeout) |
1672 | char_time = min(char_time, timeout); |
1673 | /* |
1674 | * If the transmitter hasn't cleared in twice the approximate |
1675 | * amount of time to send the entire FIFO, it probably won't |
1676 | * ever clear. This assumes the UART isn't doing flow |
1677 | * control, which is currently the case. Hence, if it ever |
1678 | * takes longer than info->timeout, this is probably due to a |
1679 | * UART bug of some kind. So, we clamp the timeout parameter at |
1680 | * 2*info->timeout. |
1681 | */ |
1682 | if (!timeout || timeout > 2 * info->timeout) |
1683 | timeout = 2 * info->timeout; |
1684 | #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
1685 | printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...", |
1686 | timeout, char_time, jiffies); |
1687 | #endif |
1688 | card = info->card; |
1689 | if (!cy_is_Z(card)) { |
1690 | while (cyy_readb(info, CySRER) & CyTxRdy) { |
1691 | #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
1692 | printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies); |
1693 | #endif |
1694 | if (msleep_interruptible(jiffies_to_msecs(char_time))) |
1695 | break; |
1696 | if (timeout && time_after(jiffies, orig_jiffies + |
1697 | timeout)) |
1698 | break; |
1699 | } |
1700 | } |
1701 | /* Run one more char cycle */ |
1702 | msleep_interruptible(jiffies_to_msecs(char_time * 5)); |
1703 | #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
1704 | printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); |
1705 | #endif |
1706 | } |
1707 | |
1708 | static void cy_flush_buffer(struct tty_struct *tty) |
1709 | { |
1710 | struct cyclades_port *info = tty->driver_data; |
1711 | struct cyclades_card *card; |
1712 | int channel, retval; |
1713 | unsigned long flags; |
1714 | |
1715 | #ifdef CY_DEBUG_IO |
1716 | printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line); |
1717 | #endif |
1718 | |
1719 | if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) |
1720 | return; |
1721 | |
1722 | card = info->card; |
1723 | channel = info->line - card->first_line; |
1724 | |
1725 | spin_lock_irqsave(&card->card_lock, flags); |
1726 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
1727 | spin_unlock_irqrestore(&card->card_lock, flags); |
1728 | |
1729 | if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board |
1730 | buffers as well */ |
1731 | spin_lock_irqsave(&card->card_lock, flags); |
1732 | retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L); |
1733 | if (retval != 0) { |
1734 | printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d " |
1735 | "was %x\n", info->line, retval); |
1736 | } |
1737 | spin_unlock_irqrestore(&card->card_lock, flags); |
1738 | } |
1739 | tty_wakeup(tty); |
1740 | } /* cy_flush_buffer */ |
1741 | |
1742 | |
1743 | static void cy_do_close(struct tty_port *port) |
1744 | { |
1745 | struct cyclades_port *info = container_of(port, struct cyclades_port, |
1746 | port); |
1747 | struct cyclades_card *card; |
1748 | unsigned long flags; |
1749 | int channel; |
1750 | |
1751 | card = info->card; |
1752 | channel = info->line - card->first_line; |
1753 | spin_lock_irqsave(&card->card_lock, flags); |
1754 | |
1755 | if (!cy_is_Z(card)) { |
1756 | /* Stop accepting input */ |
1757 | cyy_writeb(info, CyCAR, channel & 0x03); |
1758 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData); |
1759 | if (info->port.flags & ASYNC_INITIALIZED) { |
1760 | /* Waiting for on-board buffers to be empty before |
1761 | closing the port */ |
1762 | spin_unlock_irqrestore(&card->card_lock, flags); |
1763 | cy_wait_until_sent(port->tty, info->timeout); |
1764 | spin_lock_irqsave(&card->card_lock, flags); |
1765 | } |
1766 | } else { |
1767 | #ifdef Z_WAKE |
1768 | /* Waiting for on-board buffers to be empty before closing |
1769 | the port */ |
1770 | struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl; |
1771 | int retval; |
1772 | |
1773 | if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) { |
1774 | retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L); |
1775 | if (retval != 0) { |
1776 | printk(KERN_DEBUG "cyc:cy_close retval on " |
1777 | "ttyC%d was %x\n", info->line, retval); |
1778 | } |
1779 | spin_unlock_irqrestore(&card->card_lock, flags); |
1780 | wait_for_completion_interruptible(&info->shutdown_wait); |
1781 | spin_lock_irqsave(&card->card_lock, flags); |
1782 | } |
1783 | #endif |
1784 | } |
1785 | spin_unlock_irqrestore(&card->card_lock, flags); |
1786 | cy_shutdown(info, port->tty); |
1787 | } |
1788 | |
1789 | /* |
1790 | * This routine is called when a particular tty device is closed. |
1791 | */ |
1792 | static void cy_close(struct tty_struct *tty, struct file *filp) |
1793 | { |
1794 | struct cyclades_port *info = tty->driver_data; |
1795 | if (!info || serial_paranoia_check(info, tty->name, "cy_close")) |
1796 | return; |
1797 | tty_port_close(&info->port, tty, filp); |
1798 | } /* cy_close */ |
1799 | |
1800 | /* This routine gets called when tty_write has put something into |
1801 | * the write_queue. The characters may come from user space or |
1802 | * kernel space. |
1803 | * |
1804 | * This routine will return the number of characters actually |
1805 | * accepted for writing. |
1806 | * |
1807 | * If the port is not already transmitting stuff, start it off by |
1808 | * enabling interrupts. The interrupt service routine will then |
1809 | * ensure that the characters are sent. |
1810 | * If the port is already active, there is no need to kick it. |
1811 | * |
1812 | */ |
1813 | static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) |
1814 | { |
1815 | struct cyclades_port *info = tty->driver_data; |
1816 | unsigned long flags; |
1817 | int c, ret = 0; |
1818 | |
1819 | #ifdef CY_DEBUG_IO |
1820 | printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line); |
1821 | #endif |
1822 | |
1823 | if (serial_paranoia_check(info, tty->name, "cy_write")) |
1824 | return 0; |
1825 | |
1826 | if (!info->port.xmit_buf) |
1827 | return 0; |
1828 | |
1829 | spin_lock_irqsave(&info->card->card_lock, flags); |
1830 | while (1) { |
1831 | c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1)); |
1832 | c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head)); |
1833 | |
1834 | if (c <= 0) |
1835 | break; |
1836 | |
1837 | memcpy(info->port.xmit_buf + info->xmit_head, buf, c); |
1838 | info->xmit_head = (info->xmit_head + c) & |
1839 | (SERIAL_XMIT_SIZE - 1); |
1840 | info->xmit_cnt += c; |
1841 | buf += c; |
1842 | count -= c; |
1843 | ret += c; |
1844 | } |
1845 | spin_unlock_irqrestore(&info->card->card_lock, flags); |
1846 | |
1847 | info->idle_stats.xmit_bytes += ret; |
1848 | info->idle_stats.xmit_idle = jiffies; |
1849 | |
1850 | if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1851 | start_xmit(info); |
1852 | |
1853 | return ret; |
1854 | } /* cy_write */ |
1855 | |
1856 | /* |
1857 | * This routine is called by the kernel to write a single |
1858 | * character to the tty device. If the kernel uses this routine, |
1859 | * it must call the flush_chars() routine (if defined) when it is |
1860 | * done stuffing characters into the driver. If there is no room |
1861 | * in the queue, the character is ignored. |
1862 | */ |
1863 | static int cy_put_char(struct tty_struct *tty, unsigned char ch) |
1864 | { |
1865 | struct cyclades_port *info = tty->driver_data; |
1866 | unsigned long flags; |
1867 | |
1868 | #ifdef CY_DEBUG_IO |
1869 | printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line); |
1870 | #endif |
1871 | |
1872 | if (serial_paranoia_check(info, tty->name, "cy_put_char")) |
1873 | return 0; |
1874 | |
1875 | if (!info->port.xmit_buf) |
1876 | return 0; |
1877 | |
1878 | spin_lock_irqsave(&info->card->card_lock, flags); |
1879 | if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) { |
1880 | spin_unlock_irqrestore(&info->card->card_lock, flags); |
1881 | return 0; |
1882 | } |
1883 | |
1884 | info->port.xmit_buf[info->xmit_head++] = ch; |
1885 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; |
1886 | info->xmit_cnt++; |
1887 | info->idle_stats.xmit_bytes++; |
1888 | info->idle_stats.xmit_idle = jiffies; |
1889 | spin_unlock_irqrestore(&info->card->card_lock, flags); |
1890 | return 1; |
1891 | } /* cy_put_char */ |
1892 | |
1893 | /* |
1894 | * This routine is called by the kernel after it has written a |
1895 | * series of characters to the tty device using put_char(). |
1896 | */ |
1897 | static void cy_flush_chars(struct tty_struct *tty) |
1898 | { |
1899 | struct cyclades_port *info = tty->driver_data; |
1900 | |
1901 | #ifdef CY_DEBUG_IO |
1902 | printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line); |
1903 | #endif |
1904 | |
1905 | if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) |
1906 | return; |
1907 | |
1908 | if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1909 | !info->port.xmit_buf) |
1910 | return; |
1911 | |
1912 | start_xmit(info); |
1913 | } /* cy_flush_chars */ |
1914 | |
1915 | /* |
1916 | * This routine returns the numbers of characters the tty driver |
1917 | * will accept for queuing to be written. This number is subject |
1918 | * to change as output buffers get emptied, or if the output flow |
1919 | * control is activated. |
1920 | */ |
1921 | static int cy_write_room(struct tty_struct *tty) |
1922 | { |
1923 | struct cyclades_port *info = tty->driver_data; |
1924 | int ret; |
1925 | |
1926 | #ifdef CY_DEBUG_IO |
1927 | printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line); |
1928 | #endif |
1929 | |
1930 | if (serial_paranoia_check(info, tty->name, "cy_write_room")) |
1931 | return 0; |
1932 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; |
1933 | if (ret < 0) |
1934 | ret = 0; |
1935 | return ret; |
1936 | } /* cy_write_room */ |
1937 | |
1938 | static int cy_chars_in_buffer(struct tty_struct *tty) |
1939 | { |
1940 | struct cyclades_port *info = tty->driver_data; |
1941 | |
1942 | if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) |
1943 | return 0; |
1944 | |
1945 | #ifdef Z_EXT_CHARS_IN_BUFFER |
1946 | if (!cy_is_Z(info->card)) { |
1947 | #endif /* Z_EXT_CHARS_IN_BUFFER */ |
1948 | #ifdef CY_DEBUG_IO |
1949 | printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", |
1950 | info->line, info->xmit_cnt); |
1951 | #endif |
1952 | return info->xmit_cnt; |
1953 | #ifdef Z_EXT_CHARS_IN_BUFFER |
1954 | } else { |
1955 | struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl; |
1956 | int char_count; |
1957 | __u32 tx_put, tx_get, tx_bufsize; |
1958 | |
1959 | tx_get = readl(&buf_ctrl->tx_get); |
1960 | tx_put = readl(&buf_ctrl->tx_put); |
1961 | tx_bufsize = readl(&buf_ctrl->tx_bufsize); |
1962 | if (tx_put >= tx_get) |
1963 | char_count = tx_put - tx_get; |
1964 | else |
1965 | char_count = tx_put - tx_get + tx_bufsize; |
1966 | #ifdef CY_DEBUG_IO |
1967 | printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", |
1968 | info->line, info->xmit_cnt + char_count); |
1969 | #endif |
1970 | return info->xmit_cnt + char_count; |
1971 | } |
1972 | #endif /* Z_EXT_CHARS_IN_BUFFER */ |
1973 | } /* cy_chars_in_buffer */ |
1974 | |
1975 | /* |
1976 | * ------------------------------------------------------------ |
1977 | * cy_ioctl() and friends |
1978 | * ------------------------------------------------------------ |
1979 | */ |
1980 | |
1981 | static void cyy_baud_calc(struct cyclades_port *info, __u32 baud) |
1982 | { |
1983 | int co, co_val, bpr; |
1984 | __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : |
1985 | 25000000); |
1986 | |
1987 | if (baud == 0) { |
1988 | info->tbpr = info->tco = info->rbpr = info->rco = 0; |
1989 | return; |
1990 | } |
1991 | |
1992 | /* determine which prescaler to use */ |
1993 | for (co = 4, co_val = 2048; co; co--, co_val >>= 2) { |
1994 | if (cy_clock / co_val / baud > 63) |
1995 | break; |
1996 | } |
1997 | |
1998 | bpr = (cy_clock / co_val * 2 / baud + 1) / 2; |
1999 | if (bpr > 255) |
2000 | bpr = 255; |
2001 | |
2002 | info->tbpr = info->rbpr = bpr; |
2003 | info->tco = info->rco = co; |
2004 | } |
2005 | |
2006 | /* |
2007 | * This routine finds or computes the various line characteristics. |
2008 | * It used to be called config_setup |
2009 | */ |
2010 | static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty) |
2011 | { |
2012 | struct cyclades_card *card; |
2013 | unsigned long flags; |
2014 | int channel; |
2015 | unsigned cflag, iflag; |
2016 | int baud, baud_rate = 0; |
2017 | int i; |
2018 | |
2019 | if (!tty->termios) /* XXX can this happen at all? */ |
2020 | return; |
2021 | |
2022 | if (info->line == -1) |
2023 | return; |
2024 | |
2025 | cflag = tty->termios->c_cflag; |
2026 | iflag = tty->termios->c_iflag; |
2027 | |
2028 | /* |
2029 | * Set up the tty->alt_speed kludge |
2030 | */ |
2031 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
2032 | tty->alt_speed = 57600; |
2033 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
2034 | tty->alt_speed = 115200; |
2035 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
2036 | tty->alt_speed = 230400; |
2037 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
2038 | tty->alt_speed = 460800; |
2039 | |
2040 | card = info->card; |
2041 | channel = info->line - card->first_line; |
2042 | |
2043 | if (!cy_is_Z(card)) { |
2044 | u32 cflags; |
2045 | |
2046 | /* baud rate */ |
2047 | baud = tty_get_baud_rate(tty); |
2048 | if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
2049 | ASYNC_SPD_CUST) { |
2050 | if (info->custom_divisor) |
2051 | baud_rate = info->baud / info->custom_divisor; |
2052 | else |
2053 | baud_rate = info->baud; |
2054 | } else if (baud > CD1400_MAX_SPEED) { |
2055 | baud = CD1400_MAX_SPEED; |
2056 | } |
2057 | /* find the baud index */ |
2058 | for (i = 0; i < 20; i++) { |
2059 | if (baud == baud_table[i]) |
2060 | break; |
2061 | } |
2062 | if (i == 20) |
2063 | i = 19; /* CD1400_MAX_SPEED */ |
2064 | |
2065 | if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
2066 | ASYNC_SPD_CUST) { |
2067 | cyy_baud_calc(info, baud_rate); |
2068 | } else { |
2069 | if (info->chip_rev >= CD1400_REV_J) { |
2070 | /* It is a CD1400 rev. J or later */ |
2071 | info->tbpr = baud_bpr_60[i]; /* Tx BPR */ |
2072 | info->tco = baud_co_60[i]; /* Tx CO */ |
2073 | info->rbpr = baud_bpr_60[i]; /* Rx BPR */ |
2074 | info->rco = baud_co_60[i]; /* Rx CO */ |
2075 | } else { |
2076 | info->tbpr = baud_bpr_25[i]; /* Tx BPR */ |
2077 | info->tco = baud_co_25[i]; /* Tx CO */ |
2078 | info->rbpr = baud_bpr_25[i]; /* Rx BPR */ |
2079 | info->rco = baud_co_25[i]; /* Rx CO */ |
2080 | } |
2081 | } |
2082 | if (baud_table[i] == 134) { |
2083 | /* get it right for 134.5 baud */ |
2084 | info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + |
2085 | 2; |
2086 | } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
2087 | ASYNC_SPD_CUST) { |
2088 | info->timeout = (info->xmit_fifo_size * HZ * 15 / |
2089 | baud_rate) + 2; |
2090 | } else if (baud_table[i]) { |
2091 | info->timeout = (info->xmit_fifo_size * HZ * 15 / |
2092 | baud_table[i]) + 2; |
2093 | /* this needs to be propagated into the card info */ |
2094 | } else { |
2095 | info->timeout = 0; |
2096 | } |
2097 | /* By tradition (is it a standard?) a baud rate of zero |
2098 | implies the line should be/has been closed. A bit |
2099 | later in this routine such a test is performed. */ |
2100 | |
2101 | /* byte size and parity */ |
2102 | info->cor5 = 0; |
2103 | info->cor4 = 0; |
2104 | /* receive threshold */ |
2105 | info->cor3 = (info->default_threshold ? |
2106 | info->default_threshold : baud_cor3[i]); |
2107 | info->cor2 = CyETC; |
2108 | switch (cflag & CSIZE) { |
2109 | case CS5: |
2110 | info->cor1 = Cy_5_BITS; |
2111 | break; |
2112 | case CS6: |
2113 | info->cor1 = Cy_6_BITS; |
2114 | break; |
2115 | case CS7: |
2116 | info->cor1 = Cy_7_BITS; |
2117 | break; |
2118 | case CS8: |
2119 | info->cor1 = Cy_8_BITS; |
2120 | break; |
2121 | } |
2122 | if (cflag & CSTOPB) |
2123 | info->cor1 |= Cy_2_STOP; |
2124 | |
2125 | if (cflag & PARENB) { |
2126 | if (cflag & PARODD) |
2127 | info->cor1 |= CyPARITY_O; |
2128 | else |
2129 | info->cor1 |= CyPARITY_E; |
2130 | } else |
2131 | info->cor1 |= CyPARITY_NONE; |
2132 | |
2133 | /* CTS flow control flag */ |
2134 | if (cflag & CRTSCTS) { |
2135 | info->port.flags |= ASYNC_CTS_FLOW; |
2136 | info->cor2 |= CyCtsAE; |
2137 | } else { |
2138 | info->port.flags &= ~ASYNC_CTS_FLOW; |
2139 | info->cor2 &= ~CyCtsAE; |
2140 | } |
2141 | if (cflag & CLOCAL) |
2142 | info->port.flags &= ~ASYNC_CHECK_CD; |
2143 | else |
2144 | info->port.flags |= ASYNC_CHECK_CD; |
2145 | |
2146 | /*********************************************** |
2147 | The hardware option, CyRtsAO, presents RTS when |
2148 | the chip has characters to send. Since most modems |
2149 | use RTS as reverse (inbound) flow control, this |
2150 | option is not used. If inbound flow control is |
2151 | necessary, DTR can be programmed to provide the |
2152 | appropriate signals for use with a non-standard |
2153 | cable. Contact Marcio Saito for details. |
2154 | ***********************************************/ |
2155 | |
2156 | channel &= 0x03; |
2157 | |
2158 | spin_lock_irqsave(&card->card_lock, flags); |
2159 | cyy_writeb(info, CyCAR, channel); |
2160 | |
2161 | /* tx and rx baud rate */ |
2162 | |
2163 | cyy_writeb(info, CyTCOR, info->tco); |
2164 | cyy_writeb(info, CyTBPR, info->tbpr); |
2165 | cyy_writeb(info, CyRCOR, info->rco); |
2166 | cyy_writeb(info, CyRBPR, info->rbpr); |
2167 | |
2168 | /* set line characteristics according configuration */ |
2169 | |
2170 | cyy_writeb(info, CySCHR1, START_CHAR(tty)); |
2171 | cyy_writeb(info, CySCHR2, STOP_CHAR(tty)); |
2172 | cyy_writeb(info, CyCOR1, info->cor1); |
2173 | cyy_writeb(info, CyCOR2, info->cor2); |
2174 | cyy_writeb(info, CyCOR3, info->cor3); |
2175 | cyy_writeb(info, CyCOR4, info->cor4); |
2176 | cyy_writeb(info, CyCOR5, info->cor5); |
2177 | |
2178 | cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch | |
2179 | CyCOR3ch); |
2180 | |
2181 | /* !!! Is this needed? */ |
2182 | cyy_writeb(info, CyCAR, channel); |
2183 | cyy_writeb(info, CyRTPR, |
2184 | (info->default_timeout ? info->default_timeout : 0x02)); |
2185 | /* 10ms rx timeout */ |
2186 | |
2187 | cflags = CyCTS; |
2188 | if (!C_CLOCAL(tty)) |
2189 | cflags |= CyDSR | CyRI | CyDCD; |
2190 | /* without modem intr */ |
2191 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh); |
2192 | /* act on 1->0 modem transitions */ |
2193 | if ((cflag & CRTSCTS) && info->rflow) |
2194 | cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]); |
2195 | else |
2196 | cyy_writeb(info, CyMCOR1, cflags); |
2197 | /* act on 0->1 modem transitions */ |
2198 | cyy_writeb(info, CyMCOR2, cflags); |
2199 | |
2200 | if (i == 0) /* baud rate is zero, turn off line */ |
2201 | cyy_change_rts_dtr(info, 0, TIOCM_DTR); |
2202 | else |
2203 | cyy_change_rts_dtr(info, TIOCM_DTR, 0); |
2204 | |
2205 | clear_bit(TTY_IO_ERROR, &tty->flags); |
2206 | spin_unlock_irqrestore(&card->card_lock, flags); |
2207 | |
2208 | } else { |
2209 | struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl; |
2210 | __u32 sw_flow; |
2211 | int retval; |
2212 | |
2213 | if (!cyz_is_loaded(card)) |
2214 | return; |
2215 | |
2216 | /* baud rate */ |
2217 | baud = tty_get_baud_rate(tty); |
2218 | if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
2219 | ASYNC_SPD_CUST) { |
2220 | if (info->custom_divisor) |
2221 | baud_rate = info->baud / info->custom_divisor; |
2222 | else |
2223 | baud_rate = info->baud; |
2224 | } else if (baud > CYZ_MAX_SPEED) { |
2225 | baud = CYZ_MAX_SPEED; |
2226 | } |
2227 | cy_writel(&ch_ctrl->comm_baud, baud); |
2228 | |
2229 | if (baud == 134) { |
2230 | /* get it right for 134.5 baud */ |
2231 | info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + |
2232 | 2; |
2233 | } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
2234 | ASYNC_SPD_CUST) { |
2235 | info->timeout = (info->xmit_fifo_size * HZ * 15 / |
2236 | baud_rate) + 2; |
2237 | } else if (baud) { |
2238 | info->timeout = (info->xmit_fifo_size * HZ * 15 / |
2239 | baud) + 2; |
2240 | /* this needs to be propagated into the card info */ |
2241 | } else { |
2242 | info->timeout = 0; |
2243 | } |
2244 | |
2245 | /* byte size and parity */ |
2246 | switch (cflag & CSIZE) { |
2247 | case CS5: |
2248 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5); |
2249 | break; |
2250 | case CS6: |
2251 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6); |
2252 | break; |
2253 | case CS7: |
2254 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7); |
2255 | break; |
2256 | case CS8: |
2257 | cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8); |
2258 | break; |
2259 | } |
2260 | if (cflag & CSTOPB) { |
2261 | cy_writel(&ch_ctrl->comm_data_l, |
2262 | readl(&ch_ctrl->comm_data_l) | C_DL_2STOP); |
2263 | } else { |
2264 | cy_writel(&ch_ctrl->comm_data_l, |
2265 | readl(&ch_ctrl->comm_data_l) | C_DL_1STOP); |
2266 | } |
2267 | if (cflag & PARENB) { |
2268 | if (cflag & PARODD) |
2269 | cy_writel(&ch_ctrl->comm_parity, C_PR_ODD); |
2270 | else |
2271 | cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN); |
2272 | } else |
2273 | cy_writel(&ch_ctrl->comm_parity, C_PR_NONE); |
2274 | |
2275 | /* CTS flow control flag */ |
2276 | if (cflag & CRTSCTS) { |
2277 | cy_writel(&ch_ctrl->hw_flow, |
2278 | readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS); |
2279 | } else { |
2280 | cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) & |
2281 | ~(C_RS_CTS | C_RS_RTS)); |
2282 | } |
2283 | /* As the HW flow control is done in firmware, the driver |
2284 | doesn't need to care about it */ |
2285 | info->port.flags &= ~ASYNC_CTS_FLOW; |
2286 | |
2287 | /* XON/XOFF/XANY flow control flags */ |
2288 | sw_flow = 0; |
2289 | if (iflag & IXON) { |
2290 | sw_flow |= C_FL_OXX; |
2291 | if (iflag & IXANY) |
2292 | sw_flow |= C_FL_OIXANY; |
2293 | } |
2294 | cy_writel(&ch_ctrl->sw_flow, sw_flow); |
2295 | |
2296 | retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); |
2297 | if (retval != 0) { |
2298 | printk(KERN_ERR "cyc:set_line_char retval on ttyC%d " |
2299 | "was %x\n", info->line, retval); |
2300 | } |
2301 | |
2302 | /* CD sensitivity */ |
2303 | if (cflag & CLOCAL) |
2304 | info->port.flags &= ~ASYNC_CHECK_CD; |
2305 | else |
2306 | info->port.flags |= ASYNC_CHECK_CD; |
2307 | |
2308 | if (baud == 0) { /* baud rate is zero, turn off line */ |
2309 | cy_writel(&ch_ctrl->rs_control, |
2310 | readl(&ch_ctrl->rs_control) & ~C_RS_DTR); |
2311 | #ifdef CY_DEBUG_DTR |
2312 | printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n"); |
2313 | #endif |
2314 | } else { |
2315 | cy_writel(&ch_ctrl->rs_control, |
2316 | readl(&ch_ctrl->rs_control) | C_RS_DTR); |
2317 | #ifdef CY_DEBUG_DTR |
2318 | printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n"); |
2319 | #endif |
2320 | } |
2321 | |
2322 | retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); |
2323 | if (retval != 0) { |
2324 | printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d " |
2325 | "was %x\n", info->line, retval); |
2326 | } |
2327 | |
2328 | clear_bit(TTY_IO_ERROR, &tty->flags); |
2329 | } |
2330 | } /* set_line_char */ |
2331 | |
2332 | static int cy_get_serial_info(struct cyclades_port *info, |
2333 | struct serial_struct __user *retinfo) |
2334 | { |
2335 | struct cyclades_card *cinfo = info->card; |
2336 | struct serial_struct tmp = { |
2337 | .type = info->type, |
2338 | .line = info->line, |
2339 | .port = (info->card - cy_card) * 0x100 + info->line - |
2340 | cinfo->first_line, |
2341 | .irq = cinfo->irq, |
2342 | .flags = info->port.flags, |
2343 | .close_delay = info->port.close_delay, |
2344 | .closing_wait = info->port.closing_wait, |
2345 | .baud_base = info->baud, |
2346 | .custom_divisor = info->custom_divisor, |
2347 | .hub6 = 0, /*!!! */ |
2348 | }; |
2349 | return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; |
2350 | } |
2351 | |
2352 | static int |
2353 | cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty, |
2354 | struct serial_struct __user *new_info) |
2355 | { |
2356 | struct serial_struct new_serial; |
2357 | int ret; |
2358 | |
2359 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
2360 | return -EFAULT; |
2361 | |
2362 | mutex_lock(&info->port.mutex); |
2363 | if (!capable(CAP_SYS_ADMIN)) { |
2364 | if (new_serial.close_delay != info->port.close_delay || |
2365 | new_serial.baud_base != info->baud || |
2366 | (new_serial.flags & ASYNC_FLAGS & |
2367 | ~ASYNC_USR_MASK) != |
2368 | (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) |
2369 | { |
2370 | mutex_unlock(&info->port.mutex); |
2371 | return -EPERM; |
2372 | } |
2373 | info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) | |
2374 | (new_serial.flags & ASYNC_USR_MASK); |
2375 | info->baud = new_serial.baud_base; |
2376 | info->custom_divisor = new_serial.custom_divisor; |
2377 | goto check_and_exit; |
2378 | } |
2379 | |
2380 | /* |
2381 | * OK, past this point, all the error checking has been done. |
2382 | * At this point, we start making changes..... |
2383 | */ |
2384 | |
2385 | info->baud = new_serial.baud_base; |
2386 | info->custom_divisor = new_serial.custom_divisor; |
2387 | info->port.flags = (info->port.flags & ~ASYNC_FLAGS) | |
2388 | (new_serial.flags & ASYNC_FLAGS); |
2389 | info->port.close_delay = new_serial.close_delay * HZ / 100; |
2390 | info->port.closing_wait = new_serial.closing_wait * HZ / 100; |
2391 | |
2392 | check_and_exit: |
2393 | if (info->port.flags & ASYNC_INITIALIZED) { |
2394 | cy_set_line_char(info, tty); |
2395 | ret = 0; |
2396 | } else { |
2397 | ret = cy_startup(info, tty); |
2398 | } |
2399 | mutex_unlock(&info->port.mutex); |
2400 | return ret; |
2401 | } /* set_serial_info */ |
2402 | |
2403 | /* |
2404 | * get_lsr_info - get line status register info |
2405 | * |
2406 | * Purpose: Let user call ioctl() to get info when the UART physically |
2407 | * is emptied. On bus types like RS485, the transmitter must |
2408 | * release the bus after transmitting. This must be done when |
2409 | * the transmit shift register is empty, not be done when the |
2410 | * transmit holding register is empty. This functionality |
2411 | * allows an RS485 driver to be written in user space. |
2412 | */ |
2413 | static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value) |
2414 | { |
2415 | struct cyclades_card *card = info->card; |
2416 | unsigned int result; |
2417 | unsigned long flags; |
2418 | u8 status; |
2419 | |
2420 | if (!cy_is_Z(card)) { |
2421 | spin_lock_irqsave(&card->card_lock, flags); |
2422 | status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty); |
2423 | spin_unlock_irqrestore(&card->card_lock, flags); |
2424 | result = (status ? 0 : TIOCSER_TEMT); |
2425 | } else { |
2426 | /* Not supported yet */ |
2427 | return -EINVAL; |
2428 | } |
2429 | return put_user(result, (unsigned long __user *)value); |
2430 | } |
2431 | |
2432 | static int cy_tiocmget(struct tty_struct *tty, struct file *file) |
2433 | { |
2434 | struct cyclades_port *info = tty->driver_data; |
2435 | struct cyclades_card *card; |
2436 | int result; |
2437 | |
2438 | if (serial_paranoia_check(info, tty->name, __func__)) |
2439 | return -ENODEV; |
2440 | |
2441 | card = info->card; |
2442 | |
2443 | if (!cy_is_Z(card)) { |
2444 | unsigned long flags; |
2445 | int channel = info->line - card->first_line; |
2446 | u8 status; |
2447 | |
2448 | spin_lock_irqsave(&card->card_lock, flags); |
2449 | cyy_writeb(info, CyCAR, channel & 0x03); |
2450 | status = cyy_readb(info, CyMSVR1); |
2451 | status |= cyy_readb(info, CyMSVR2); |
2452 | spin_unlock_irqrestore(&card->card_lock, flags); |
2453 | |
2454 | if (info->rtsdtr_inv) { |
2455 | result = ((status & CyRTS) ? TIOCM_DTR : 0) | |
2456 | ((status & CyDTR) ? TIOCM_RTS : 0); |
2457 | } else { |
2458 | result = ((status & CyRTS) ? TIOCM_RTS : 0) | |
2459 | ((status & CyDTR) ? TIOCM_DTR : 0); |
2460 | } |
2461 | result |= ((status & CyDCD) ? TIOCM_CAR : 0) | |
2462 | ((status & CyRI) ? TIOCM_RNG : 0) | |
2463 | ((status & CyDSR) ? TIOCM_DSR : 0) | |
2464 | ((status & CyCTS) ? TIOCM_CTS : 0); |
2465 | } else { |
2466 | u32 lstatus; |
2467 | |
2468 | if (!cyz_is_loaded(card)) { |
2469 | result = -ENODEV; |
2470 | goto end; |
2471 | } |
2472 | |
2473 | lstatus = readl(&info->u.cyz.ch_ctrl->rs_status); |
2474 | result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) | |
2475 | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) | |
2476 | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) | |
2477 | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) | |
2478 | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) | |
2479 | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); |
2480 | } |
2481 | end: |
2482 | return result; |
2483 | } /* cy_tiomget */ |
2484 | |
2485 | static int |
2486 | cy_tiocmset(struct tty_struct *tty, struct file *file, |
2487 | unsigned int set, unsigned int clear) |
2488 | { |
2489 | struct cyclades_port *info = tty->driver_data; |
2490 | struct cyclades_card *card; |
2491 | unsigned long flags; |
2492 | |
2493 | if (serial_paranoia_check(info, tty->name, __func__)) |
2494 | return -ENODEV; |
2495 | |
2496 | card = info->card; |
2497 | if (!cy_is_Z(card)) { |
2498 | spin_lock_irqsave(&card->card_lock, flags); |
2499 | cyy_change_rts_dtr(info, set, clear); |
2500 | spin_unlock_irqrestore(&card->card_lock, flags); |
2501 | } else { |
2502 | struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl; |
2503 | int retval, channel = info->line - card->first_line; |
2504 | u32 rs; |
2505 | |
2506 | if (!cyz_is_loaded(card)) |
2507 | return -ENODEV; |
2508 | |
2509 | spin_lock_irqsave(&card->card_lock, flags); |
2510 | rs = readl(&ch_ctrl->rs_control); |
2511 | if (set & TIOCM_RTS) |
2512 | rs |= C_RS_RTS; |
2513 | if (clear & TIOCM_RTS) |
2514 | rs &= ~C_RS_RTS; |
2515 | if (set & TIOCM_DTR) { |
2516 | rs |= C_RS_DTR; |
2517 | #ifdef CY_DEBUG_DTR |
2518 | printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n"); |
2519 | #endif |
2520 | } |
2521 | if (clear & TIOCM_DTR) { |
2522 | rs &= ~C_RS_DTR; |
2523 | #ifdef CY_DEBUG_DTR |
2524 | printk(KERN_DEBUG "cyc:set_modem_info clearing " |
2525 | "Z DTR\n"); |
2526 | #endif |
2527 | } |
2528 | cy_writel(&ch_ctrl->rs_control, rs); |
2529 | retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); |
2530 | spin_unlock_irqrestore(&card->card_lock, flags); |
2531 | if (retval != 0) { |
2532 | printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d " |
2533 | "was %x\n", info->line, retval); |
2534 | } |
2535 | } |
2536 | return 0; |
2537 | } |
2538 | |
2539 | /* |
2540 | * cy_break() --- routine which turns the break handling on or off |
2541 | */ |
2542 | static int cy_break(struct tty_struct *tty, int break_state) |
2543 | { |
2544 | struct cyclades_port *info = tty->driver_data; |
2545 | struct cyclades_card *card; |
2546 | unsigned long flags; |
2547 | int retval = 0; |
2548 | |
2549 | if (serial_paranoia_check(info, tty->name, "cy_break")) |
2550 | return -EINVAL; |
2551 | |
2552 | card = info->card; |
2553 | |
2554 | spin_lock_irqsave(&card->card_lock, flags); |
2555 | if (!cy_is_Z(card)) { |
2556 | /* Let the transmit ISR take care of this (since it |
2557 | requires stuffing characters into the output stream). |
2558 | */ |
2559 | if (break_state == -1) { |
2560 | if (!info->breakon) { |
2561 | info->breakon = 1; |
2562 | if (!info->xmit_cnt) { |
2563 | spin_unlock_irqrestore(&card->card_lock, flags); |
2564 | start_xmit(info); |
2565 | spin_lock_irqsave(&card->card_lock, flags); |
2566 | } |
2567 | } |
2568 | } else { |
2569 | if (!info->breakoff) { |
2570 | info->breakoff = 1; |
2571 | if (!info->xmit_cnt) { |
2572 | spin_unlock_irqrestore(&card->card_lock, flags); |
2573 | start_xmit(info); |
2574 | spin_lock_irqsave(&card->card_lock, flags); |
2575 | } |
2576 | } |
2577 | } |
2578 | } else { |
2579 | if (break_state == -1) { |
2580 | retval = cyz_issue_cmd(card, |
2581 | info->line - card->first_line, |
2582 | C_CM_SET_BREAK, 0L); |
2583 | if (retval != 0) { |
2584 | printk(KERN_ERR "cyc:cy_break (set) retval on " |
2585 | "ttyC%d was %x\n", info->line, retval); |
2586 | } |
2587 | } else { |
2588 | retval = cyz_issue_cmd(card, |
2589 | info->line - card->first_line, |
2590 | C_CM_CLR_BREAK, 0L); |
2591 | if (retval != 0) { |
2592 | printk(KERN_DEBUG "cyc:cy_break (clr) retval " |
2593 | "on ttyC%d was %x\n", info->line, |
2594 | retval); |
2595 | } |
2596 | } |
2597 | } |
2598 | spin_unlock_irqrestore(&card->card_lock, flags); |
2599 | return retval; |
2600 | } /* cy_break */ |
2601 | |
2602 | static int set_threshold(struct cyclades_port *info, unsigned long value) |
2603 | { |
2604 | struct cyclades_card *card = info->card; |
2605 | unsigned long flags; |
2606 | |
2607 | if (!cy_is_Z(card)) { |
2608 | info->cor3 &= ~CyREC_FIFO; |
2609 | info->cor3 |= value & CyREC_FIFO; |
2610 | |
2611 | spin_lock_irqsave(&card->card_lock, flags); |
2612 | cyy_writeb(info, CyCOR3, info->cor3); |
2613 | cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch); |
2614 | spin_unlock_irqrestore(&card->card_lock, flags); |
2615 | } |
2616 | return 0; |
2617 | } /* set_threshold */ |
2618 | |
2619 | static int get_threshold(struct cyclades_port *info, |
2620 | unsigned long __user *value) |
2621 | { |
2622 | struct cyclades_card *card = info->card; |
2623 | |
2624 | if (!cy_is_Z(card)) { |
2625 | u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO; |
2626 | return put_user(tmp, value); |
2627 | } |
2628 | return 0; |
2629 | } /* get_threshold */ |
2630 | |
2631 | static int set_timeout(struct cyclades_port *info, unsigned long value) |
2632 | { |
2633 | struct cyclades_card *card = info->card; |
2634 | unsigned long flags; |
2635 | |
2636 | if (!cy_is_Z(card)) { |
2637 | spin_lock_irqsave(&card->card_lock, flags); |
2638 | cyy_writeb(info, CyRTPR, value & 0xff); |
2639 | spin_unlock_irqrestore(&card->card_lock, flags); |
2640 | } |
2641 | return 0; |
2642 | } /* set_timeout */ |
2643 | |
2644 | static int get_timeout(struct cyclades_port *info, |
2645 | unsigned long __user *value) |
2646 | { |
2647 | struct cyclades_card *card = info->card; |
2648 | |
2649 | if (!cy_is_Z(card)) { |
2650 | u8 tmp = cyy_readb(info, CyRTPR); |
2651 | return put_user(tmp, value); |
2652 | } |
2653 | return 0; |
2654 | } /* get_timeout */ |
2655 | |
2656 | static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg, |
2657 | struct cyclades_icount *cprev) |
2658 | { |
2659 | struct cyclades_icount cnow; |
2660 | unsigned long flags; |
2661 | int ret; |
2662 | |
2663 | spin_lock_irqsave(&info->card->card_lock, flags); |
2664 | cnow = info->icount; /* atomic copy */ |
2665 | spin_unlock_irqrestore(&info->card->card_lock, flags); |
2666 | |
2667 | ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
2668 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || |
2669 | ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || |
2670 | ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); |
2671 | |
2672 | *cprev = cnow; |
2673 | |
2674 | return ret; |
2675 | } |
2676 | |
2677 | /* |
2678 | * This routine allows the tty driver to implement device- |
2679 | * specific ioctl's. If the ioctl number passed in cmd is |
2680 | * not recognized by the driver, it should return ENOIOCTLCMD. |
2681 | */ |
2682 | static int |
2683 | cy_ioctl(struct tty_struct *tty, struct file *file, |
2684 | unsigned int cmd, unsigned long arg) |
2685 | { |
2686 | struct cyclades_port *info = tty->driver_data; |
2687 | struct cyclades_icount cnow; /* kernel counter temps */ |
2688 | int ret_val = 0; |
2689 | unsigned long flags; |
2690 | void __user *argp = (void __user *)arg; |
2691 | |
2692 | if (serial_paranoia_check(info, tty->name, "cy_ioctl")) |
2693 | return -ENODEV; |
2694 | |
2695 | #ifdef CY_DEBUG_OTHER |
2696 | printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", |
2697 | info->line, cmd, arg); |
2698 | #endif |
2699 | |
2700 | switch (cmd) { |
2701 | case CYGETMON: |
2702 | if (copy_to_user(argp, &info->mon, sizeof(info->mon))) { |
2703 | ret_val = -EFAULT; |
2704 | break; |
2705 | } |
2706 | memset(&info->mon, 0, sizeof(info->mon)); |
2707 | break; |
2708 | case CYGETTHRESH: |
2709 | ret_val = get_threshold(info, argp); |
2710 | break; |
2711 | case CYSETTHRESH: |
2712 | ret_val = set_threshold(info, arg); |
2713 | break; |
2714 | case CYGETDEFTHRESH: |
2715 | ret_val = put_user(info->default_threshold, |
2716 | (unsigned long __user *)argp); |
2717 | break; |
2718 | case CYSETDEFTHRESH: |
2719 | info->default_threshold = arg & 0x0f; |
2720 | break; |
2721 | case CYGETTIMEOUT: |
2722 | ret_val = get_timeout(info, argp); |
2723 | break; |
2724 | case CYSETTIMEOUT: |
2725 | ret_val = set_timeout(info, arg); |
2726 | break; |
2727 | case CYGETDEFTIMEOUT: |
2728 | ret_val = put_user(info->default_timeout, |
2729 | (unsigned long __user *)argp); |
2730 | break; |
2731 | case CYSETDEFTIMEOUT: |
2732 | info->default_timeout = arg & 0xff; |
2733 | break; |
2734 | case CYSETRFLOW: |
2735 | info->rflow = (int)arg; |
2736 | break; |
2737 | case CYGETRFLOW: |
2738 | ret_val = info->rflow; |
2739 | break; |
2740 | case CYSETRTSDTR_INV: |
2741 | info->rtsdtr_inv = (int)arg; |
2742 | break; |
2743 | case CYGETRTSDTR_INV: |
2744 | ret_val = info->rtsdtr_inv; |
2745 | break; |
2746 | case CYGETCD1400VER: |
2747 | ret_val = info->chip_rev; |
2748 | break; |
2749 | #ifndef CONFIG_CYZ_INTR |
2750 | case CYZSETPOLLCYCLE: |
2751 | cyz_polling_cycle = (arg * HZ) / 1000; |
2752 | break; |
2753 | case CYZGETPOLLCYCLE: |
2754 | ret_val = (cyz_polling_cycle * 1000) / HZ; |
2755 | break; |
2756 | #endif /* CONFIG_CYZ_INTR */ |
2757 | case CYSETWAIT: |
2758 | info->port.closing_wait = (unsigned short)arg * HZ / 100; |
2759 | break; |
2760 | case CYGETWAIT: |
2761 | ret_val = info->port.closing_wait / (HZ / 100); |
2762 | break; |
2763 | case TIOCGSERIAL: |
2764 | ret_val = cy_get_serial_info(info, argp); |
2765 | break; |
2766 | case TIOCSSERIAL: |
2767 | ret_val = cy_set_serial_info(info, tty, argp); |
2768 | break; |
2769 | case TIOCSERGETLSR: /* Get line status register */ |
2770 | ret_val = get_lsr_info(info, argp); |
2771 | break; |
2772 | /* |
2773 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change |
2774 | * - mask passed in arg for lines of interest |
2775 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) |
2776 | * Caller should use TIOCGICOUNT to see which one it was |
2777 | */ |
2778 | case TIOCMIWAIT: |
2779 | spin_lock_irqsave(&info->card->card_lock, flags); |
2780 | /* note the counters on entry */ |
2781 | cnow = info->icount; |
2782 | spin_unlock_irqrestore(&info->card->card_lock, flags); |
2783 | ret_val = wait_event_interruptible(info->port.delta_msr_wait, |
2784 | cy_cflags_changed(info, arg, &cnow)); |
2785 | break; |
2786 | |
2787 | /* |
2788 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
2789 | * Return: write counters to the user passed counter struct |
2790 | * NB: both 1->0 and 0->1 transitions are counted except for |
2791 | * RI where only 0->1 is counted. |
2792 | */ |
2793 | default: |
2794 | ret_val = -ENOIOCTLCMD; |
2795 | } |
2796 | |
2797 | #ifdef CY_DEBUG_OTHER |
2798 | printk(KERN_DEBUG "cyc:cy_ioctl done\n"); |
2799 | #endif |
2800 | return ret_val; |
2801 | } /* cy_ioctl */ |
2802 | |
2803 | static int cy_get_icount(struct tty_struct *tty, |
2804 | struct serial_icounter_struct *sic) |
2805 | { |
2806 | struct cyclades_port *info = tty->driver_data; |
2807 | struct cyclades_icount cnow; /* Used to snapshot */ |
2808 | unsigned long flags; |
2809 | |
2810 | spin_lock_irqsave(&info->card->card_lock, flags); |
2811 | cnow = info->icount; |
2812 | spin_unlock_irqrestore(&info->card->card_lock, flags); |
2813 | |
2814 | sic->cts = cnow.cts; |
2815 | sic->dsr = cnow.dsr; |
2816 | sic->rng = cnow.rng; |
2817 | sic->dcd = cnow.dcd; |
2818 | sic->rx = cnow.rx; |
2819 | sic->tx = cnow.tx; |
2820 | sic->frame = cnow.frame; |
2821 | sic->overrun = cnow.overrun; |
2822 | sic->parity = cnow.parity; |
2823 | sic->brk = cnow.brk; |
2824 | sic->buf_overrun = cnow.buf_overrun; |
2825 | return 0; |
2826 | } |
2827 | |
2828 | /* |
2829 | * This routine allows the tty driver to be notified when |
2830 | * device's termios settings have changed. Note that a |
2831 | * well-designed tty driver should be prepared to accept the case |
2832 | * where old == NULL, and try to do something rational. |
2833 | */ |
2834 | static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
2835 | { |
2836 | struct cyclades_port *info = tty->driver_data; |
2837 | |
2838 | #ifdef CY_DEBUG_OTHER |
2839 | printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line); |
2840 | #endif |
2841 | |
2842 | cy_set_line_char(info, tty); |
2843 | |
2844 | if ((old_termios->c_cflag & CRTSCTS) && |
2845 | !(tty->termios->c_cflag & CRTSCTS)) { |
2846 | tty->hw_stopped = 0; |
2847 | cy_start(tty); |
2848 | } |
2849 | #if 0 |
2850 | /* |
2851 | * No need to wake up processes in open wait, since they |
2852 | * sample the CLOCAL flag once, and don't recheck it. |
2853 | * XXX It's not clear whether the current behavior is correct |
2854 | * or not. Hence, this may change..... |
2855 | */ |
2856 | if (!(old_termios->c_cflag & CLOCAL) && |
2857 | (tty->termios->c_cflag & CLOCAL)) |
2858 | wake_up_interruptible(&info->port.open_wait); |
2859 | #endif |
2860 | } /* cy_set_termios */ |
2861 | |
2862 | /* This function is used to send a high-priority XON/XOFF character to |
2863 | the device. |
2864 | */ |
2865 | static void cy_send_xchar(struct tty_struct *tty, char ch) |
2866 | { |
2867 | struct cyclades_port *info = tty->driver_data; |
2868 | struct cyclades_card *card; |
2869 | int channel; |
2870 | |
2871 | if (serial_paranoia_check(info, tty->name, "cy_send_xchar")) |
2872 | return; |
2873 | |
2874 | info->x_char = ch; |
2875 | |
2876 | if (ch) |
2877 | cy_start(tty); |
2878 | |
2879 | card = info->card; |
2880 | channel = info->line - card->first_line; |
2881 | |
2882 | if (cy_is_Z(card)) { |
2883 | if (ch == STOP_CHAR(tty)) |
2884 | cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L); |
2885 | else if (ch == START_CHAR(tty)) |
2886 | cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L); |
2887 | } |
2888 | } |
2889 | |
2890 | /* This routine is called by the upper-layer tty layer to signal |
2891 | that incoming characters should be throttled because the input |
2892 | buffers are close to full. |
2893 | */ |
2894 | static void cy_throttle(struct tty_struct *tty) |
2895 | { |
2896 | struct cyclades_port *info = tty->driver_data; |
2897 | struct cyclades_card *card; |
2898 | unsigned long flags; |
2899 | |
2900 | #ifdef CY_DEBUG_THROTTLE |
2901 | char buf[64]; |
2902 | |
2903 | printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf), |
2904 | tty->ldisc.chars_in_buffer(tty), info->line); |
2905 | #endif |
2906 | |
2907 | if (serial_paranoia_check(info, tty->name, "cy_throttle")) |
2908 | return; |
2909 | |
2910 | card = info->card; |
2911 | |
2912 | if (I_IXOFF(tty)) { |
2913 | if (!cy_is_Z(card)) |
2914 | cy_send_xchar(tty, STOP_CHAR(tty)); |
2915 | else |
2916 | info->throttle = 1; |
2917 | } |
2918 | |
2919 | if (tty->termios->c_cflag & CRTSCTS) { |
2920 | if (!cy_is_Z(card)) { |
2921 | spin_lock_irqsave(&card->card_lock, flags); |
2922 | cyy_change_rts_dtr(info, 0, TIOCM_RTS); |
2923 | spin_unlock_irqrestore(&card->card_lock, flags); |
2924 | } else { |
2925 | info->throttle = 1; |
2926 | } |
2927 | } |
2928 | } /* cy_throttle */ |
2929 | |
2930 | /* |
2931 | * This routine notifies the tty driver that it should signal |
2932 | * that characters can now be sent to the tty without fear of |
2933 | * overrunning the input buffers of the line disciplines. |
2934 | */ |
2935 | static void cy_unthrottle(struct tty_struct *tty) |
2936 | { |
2937 | struct cyclades_port *info = tty->driver_data; |
2938 | struct cyclades_card *card; |
2939 | unsigned long flags; |
2940 | |
2941 | #ifdef CY_DEBUG_THROTTLE |
2942 | char buf[64]; |
2943 | |
2944 | printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n", |
2945 | tty_name(tty, buf), tty_chars_in_buffer(tty), info->line); |
2946 | #endif |
2947 | |
2948 | if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) |
2949 | return; |
2950 | |
2951 | if (I_IXOFF(tty)) { |
2952 | if (info->x_char) |
2953 | info->x_char = 0; |
2954 | else |
2955 | cy_send_xchar(tty, START_CHAR(tty)); |
2956 | } |
2957 | |
2958 | if (tty->termios->c_cflag & CRTSCTS) { |
2959 | card = info->card; |
2960 | if (!cy_is_Z(card)) { |
2961 | spin_lock_irqsave(&card->card_lock, flags); |
2962 | cyy_change_rts_dtr(info, TIOCM_RTS, 0); |
2963 | spin_unlock_irqrestore(&card->card_lock, flags); |
2964 | } else { |
2965 | info->throttle = 0; |
2966 | } |
2967 | } |
2968 | } /* cy_unthrottle */ |
2969 | |
2970 | /* cy_start and cy_stop provide software output flow control as a |
2971 | function of XON/XOFF, software CTS, and other such stuff. |
2972 | */ |
2973 | static void cy_stop(struct tty_struct *tty) |
2974 | { |
2975 | struct cyclades_card *cinfo; |
2976 | struct cyclades_port *info = tty->driver_data; |
2977 | int channel; |
2978 | unsigned long flags; |
2979 | |
2980 | #ifdef CY_DEBUG_OTHER |
2981 | printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line); |
2982 | #endif |
2983 | |
2984 | if (serial_paranoia_check(info, tty->name, "cy_stop")) |
2985 | return; |
2986 | |
2987 | cinfo = info->card; |
2988 | channel = info->line - cinfo->first_line; |
2989 | if (!cy_is_Z(cinfo)) { |
2990 | spin_lock_irqsave(&cinfo->card_lock, flags); |
2991 | cyy_writeb(info, CyCAR, channel & 0x03); |
2992 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy); |
2993 | spin_unlock_irqrestore(&cinfo->card_lock, flags); |
2994 | } |
2995 | } /* cy_stop */ |
2996 | |
2997 | static void cy_start(struct tty_struct *tty) |
2998 | { |
2999 | struct cyclades_card *cinfo; |
3000 | struct cyclades_port *info = tty->driver_data; |
3001 | int channel; |
3002 | unsigned long flags; |
3003 | |
3004 | #ifdef CY_DEBUG_OTHER |
3005 | printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line); |
3006 | #endif |
3007 | |
3008 | if (serial_paranoia_check(info, tty->name, "cy_start")) |
3009 | return; |
3010 | |
3011 | cinfo = info->card; |
3012 | channel = info->line - cinfo->first_line; |
3013 | if (!cy_is_Z(cinfo)) { |
3014 | spin_lock_irqsave(&cinfo->card_lock, flags); |
3015 | cyy_writeb(info, CyCAR, channel & 0x03); |
3016 | cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy); |
3017 | spin_unlock_irqrestore(&cinfo->card_lock, flags); |
3018 | } |
3019 | } /* cy_start */ |
3020 | |
3021 | /* |
3022 | * cy_hangup() --- called by tty_hangup() when a hangup is signaled. |
3023 | */ |
3024 | static void cy_hangup(struct tty_struct *tty) |
3025 | { |
3026 | struct cyclades_port *info = tty->driver_data; |
3027 | |
3028 | #ifdef CY_DEBUG_OTHER |
3029 | printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line); |
3030 | #endif |
3031 | |
3032 | if (serial_paranoia_check(info, tty->name, "cy_hangup")) |
3033 | return; |
3034 | |
3035 | cy_flush_buffer(tty); |
3036 | cy_shutdown(info, tty); |
3037 | tty_port_hangup(&info->port); |
3038 | } /* cy_hangup */ |
3039 | |
3040 | static int cyy_carrier_raised(struct tty_port *port) |
3041 | { |
3042 | struct cyclades_port *info = container_of(port, struct cyclades_port, |
3043 | port); |
3044 | struct cyclades_card *cinfo = info->card; |
3045 | unsigned long flags; |
3046 | int channel = info->line - cinfo->first_line; |
3047 | u32 cd; |
3048 | |
3049 | spin_lock_irqsave(&cinfo->card_lock, flags); |
3050 | cyy_writeb(info, CyCAR, channel & 0x03); |
3051 | cd = cyy_readb(info, CyMSVR1) & CyDCD; |
3052 | spin_unlock_irqrestore(&cinfo->card_lock, flags); |
3053 | |
3054 | return cd; |
3055 | } |
3056 | |
3057 | static void cyy_dtr_rts(struct tty_port *port, int raise) |
3058 | { |
3059 | struct cyclades_port *info = container_of(port, struct cyclades_port, |
3060 | port); |
3061 | struct cyclades_card *cinfo = info->card; |
3062 | unsigned long flags; |
3063 | |
3064 | spin_lock_irqsave(&cinfo->card_lock, flags); |
3065 | cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0, |
3066 | raise ? 0 : TIOCM_RTS | TIOCM_DTR); |
3067 | spin_unlock_irqrestore(&cinfo->card_lock, flags); |
3068 | } |
3069 | |
3070 | static int cyz_carrier_raised(struct tty_port *port) |
3071 | { |
3072 | struct cyclades_port *info = container_of(port, struct cyclades_port, |
3073 | port); |
3074 | |
3075 | return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD; |
3076 | } |
3077 | |
3078 | static void cyz_dtr_rts(struct tty_port *port, int raise) |
3079 | { |
3080 | struct cyclades_port *info = container_of(port, struct cyclades_port, |
3081 | port); |
3082 | struct cyclades_card *cinfo = info->card; |
3083 | struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl; |
3084 | int ret, channel = info->line - cinfo->first_line; |
3085 | u32 rs; |
3086 | |
3087 | rs = readl(&ch_ctrl->rs_control); |
3088 | if (raise) |
3089 | rs |= C_RS_RTS | C_RS_DTR; |
3090 | else |
3091 | rs &= ~(C_RS_RTS | C_RS_DTR); |
3092 | cy_writel(&ch_ctrl->rs_control, rs); |
3093 | ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L); |
3094 | if (ret != 0) |
3095 | printk(KERN_ERR "%s: retval on ttyC%d was %x\n", |
3096 | __func__, info->line, ret); |
3097 | #ifdef CY_DEBUG_DTR |
3098 | printk(KERN_DEBUG "%s: raising Z DTR\n", __func__); |
3099 | #endif |
3100 | } |
3101 | |
3102 | static const struct tty_port_operations cyy_port_ops = { |
3103 | .carrier_raised = cyy_carrier_raised, |
3104 | .dtr_rts = cyy_dtr_rts, |
3105 | .shutdown = cy_do_close, |
3106 | }; |
3107 | |
3108 | static const struct tty_port_operations cyz_port_ops = { |
3109 | .carrier_raised = cyz_carrier_raised, |
3110 | .dtr_rts = cyz_dtr_rts, |
3111 | .shutdown = cy_do_close, |
3112 | }; |
3113 | |
3114 | /* |
3115 | * --------------------------------------------------------------------- |
3116 | * cy_init() and friends |
3117 | * |
3118 | * cy_init() is called at boot-time to initialize the serial driver. |
3119 | * --------------------------------------------------------------------- |
3120 | */ |
3121 | |
3122 | static int __devinit cy_init_card(struct cyclades_card *cinfo) |
3123 | { |
3124 | struct cyclades_port *info; |
3125 | unsigned int channel, port; |
3126 | |
3127 | spin_lock_init(&cinfo->card_lock); |
3128 | cinfo->intr_enabled = 0; |
3129 | |
3130 | cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports), |
3131 | GFP_KERNEL); |
3132 | if (cinfo->ports == NULL) { |
3133 | printk(KERN_ERR "Cyclades: cannot allocate ports\n"); |
3134 | return -ENOMEM; |
3135 | } |
3136 | |
3137 | for (channel = 0, port = cinfo->first_line; channel < cinfo->nports; |
3138 | channel++, port++) { |
3139 | info = &cinfo->ports[channel]; |
3140 | tty_port_init(&info->port); |
3141 | info->magic = CYCLADES_MAGIC; |
3142 | info->card = cinfo; |
3143 | info->line = port; |
3144 | |
3145 | info->port.closing_wait = CLOSING_WAIT_DELAY; |
3146 | info->port.close_delay = 5 * HZ / 10; |
3147 | info->port.flags = STD_COM_FLAGS; |
3148 | init_completion(&info->shutdown_wait); |
3149 | |
3150 | if (cy_is_Z(cinfo)) { |
3151 | struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS; |
3152 | struct ZFW_CTRL *zfw_ctrl; |
3153 | |
3154 | info->port.ops = &cyz_port_ops; |
3155 | info->type = PORT_STARTECH; |
3156 | |
3157 | zfw_ctrl = cinfo->base_addr + |
3158 | (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
3159 | info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel]; |
3160 | info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel]; |
3161 | |
3162 | if (cinfo->hw_ver == ZO_V1) |
3163 | info->xmit_fifo_size = CYZ_FIFO_SIZE; |
3164 | else |
3165 | info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE; |
3166 | #ifdef CONFIG_CYZ_INTR |
3167 | setup_timer(&cyz_rx_full_timer[port], |
3168 | cyz_rx_restart, (unsigned long)info); |
3169 | #endif |
3170 | } else { |
3171 | unsigned short chip_number; |
3172 | int index = cinfo->bus_index; |
3173 | |
3174 | info->port.ops = &cyy_port_ops; |
3175 | info->type = PORT_CIRRUS; |
3176 | info->xmit_fifo_size = CyMAX_CHAR_FIFO; |
3177 | info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS; |
3178 | info->cor2 = CyETC; |
3179 | info->cor3 = 0x08; /* _very_ small rcv threshold */ |
3180 | |
3181 | chip_number = channel / CyPORTS_PER_CHIP; |
3182 | info->u.cyy.base_addr = cinfo->base_addr + |
3183 | (cy_chip_offset[chip_number] << index); |
3184 | info->chip_rev = cyy_readb(info, CyGFRCR); |
3185 | |
3186 | if (info->chip_rev >= CD1400_REV_J) { |
3187 | /* It is a CD1400 rev. J or later */ |
3188 | info->tbpr = baud_bpr_60[13]; /* Tx BPR */ |
3189 | info->tco = baud_co_60[13]; /* Tx CO */ |
3190 | info->rbpr = baud_bpr_60[13]; /* Rx BPR */ |
3191 | info->rco = baud_co_60[13]; /* Rx CO */ |
3192 | info->rtsdtr_inv = 1; |
3193 | } else { |
3194 | info->tbpr = baud_bpr_25[13]; /* Tx BPR */ |
3195 | info->tco = baud_co_25[13]; /* Tx CO */ |
3196 | info->rbpr = baud_bpr_25[13]; /* Rx BPR */ |
3197 | info->rco = baud_co_25[13]; /* Rx CO */ |
3198 | info->rtsdtr_inv = 0; |
3199 | } |
3200 | info->read_status_mask = CyTIMEOUT | CySPECHAR | |
3201 | CyBREAK | CyPARITY | CyFRAME | CyOVERRUN; |
3202 | } |
3203 | |
3204 | } |
3205 | |
3206 | #ifndef CONFIG_CYZ_INTR |
3207 | if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) { |
3208 | mod_timer(&cyz_timerlist, jiffies + 1); |
3209 | #ifdef CY_PCI_DEBUG |
3210 | printk(KERN_DEBUG "Cyclades-Z polling initialized\n"); |
3211 | #endif |
3212 | } |
3213 | #endif |
3214 | return 0; |
3215 | } |
3216 | |
3217 | /* initialize chips on Cyclom-Y card -- return number of valid |
3218 | chips (which is number of ports/4) */ |
3219 | static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr, |
3220 | int index) |
3221 | { |
3222 | unsigned int chip_number; |
3223 | void __iomem *base_addr; |
3224 | |
3225 | cy_writeb(true_base_addr + (Cy_HwReset << index), 0); |
3226 | /* Cy_HwReset is 0x1400 */ |
3227 | cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0); |
3228 | /* Cy_ClrIntr is 0x1800 */ |
3229 | udelay(500L); |
3230 | |
3231 | for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; |
3232 | chip_number++) { |
3233 | base_addr = |
3234 | true_base_addr + (cy_chip_offset[chip_number] << index); |
3235 | mdelay(1); |
3236 | if (readb(base_addr + (CyCCR << index)) != 0x00) { |
3237 | /************* |
3238 | printk(" chip #%d at %#6lx is never idle (CCR != 0)\n", |
3239 | chip_number, (unsigned long)base_addr); |
3240 | *************/ |
3241 | return chip_number; |
3242 | } |
3243 | |
3244 | cy_writeb(base_addr + (CyGFRCR << index), 0); |
3245 | udelay(10L); |
3246 | |
3247 | /* The Cyclom-16Y does not decode address bit 9 and therefore |
3248 | cannot distinguish between references to chip 0 and a non- |
3249 | existent chip 4. If the preceding clearing of the supposed |
3250 | chip 4 GFRCR register appears at chip 0, there is no chip 4 |
3251 | and this must be a Cyclom-16Y, not a Cyclom-32Ye. |
3252 | */ |
3253 | if (chip_number == 4 && readb(true_base_addr + |
3254 | (cy_chip_offset[0] << index) + |
3255 | (CyGFRCR << index)) == 0) { |
3256 | return chip_number; |
3257 | } |
3258 | |
3259 | cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET); |
3260 | mdelay(1); |
3261 | |
3262 | if (readb(base_addr + (CyGFRCR << index)) == 0x00) { |
3263 | /* |
3264 | printk(" chip #%d at %#6lx is not responding ", |
3265 | chip_number, (unsigned long)base_addr); |
3266 | printk("(GFRCR stayed 0)\n", |
3267 | */ |
3268 | return chip_number; |
3269 | } |
3270 | if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) != |
3271 | 0x40) { |
3272 | /* |
3273 | printk(" chip #%d at %#6lx is not valid (GFRCR == " |
3274 | "%#2x)\n", |
3275 | chip_number, (unsigned long)base_addr, |
3276 | base_addr[CyGFRCR<<index]); |
3277 | */ |
3278 | return chip_number; |
3279 | } |
3280 | cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL); |
3281 | if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) { |
3282 | /* It is a CD1400 rev. J or later */ |
3283 | /* Impossible to reach 5ms with this chip. |
3284 | Changed to 2ms instead (f = 500 Hz). */ |
3285 | cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS); |
3286 | } else { |
3287 | /* f = 200 Hz */ |
3288 | cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS); |
3289 | } |
3290 | |
3291 | /* |
3292 | printk(" chip #%d at %#6lx is rev 0x%2x\n", |
3293 | chip_number, (unsigned long)base_addr, |
3294 | readb(base_addr+(CyGFRCR<<index))); |
3295 | */ |
3296 | } |
3297 | return chip_number; |
3298 | } /* cyy_init_card */ |
3299 | |
3300 | /* |
3301 | * --------------------------------------------------------------------- |
3302 | * cy_detect_isa() - Probe for Cyclom-Y/ISA boards. |
3303 | * sets global variables and return the number of ISA boards found. |
3304 | * --------------------------------------------------------------------- |
3305 | */ |
3306 | static int __init cy_detect_isa(void) |
3307 | { |
3308 | #ifdef CONFIG_ISA |
3309 | unsigned short cy_isa_irq, nboard; |
3310 | void __iomem *cy_isa_address; |
3311 | unsigned short i, j, cy_isa_nchan; |
3312 | int isparam = 0; |
3313 | |
3314 | nboard = 0; |
3315 | |
3316 | /* Check for module parameters */ |
3317 | for (i = 0; i < NR_CARDS; i++) { |
3318 | if (maddr[i] || i) { |
3319 | isparam = 1; |
3320 | cy_isa_addresses[i] = maddr[i]; |
3321 | } |
3322 | if (!maddr[i]) |
3323 | break; |
3324 | } |
3325 | |
3326 | /* scan the address table probing for Cyclom-Y/ISA boards */ |
3327 | for (i = 0; i < NR_ISA_ADDRS; i++) { |
3328 | unsigned int isa_address = cy_isa_addresses[i]; |
3329 | if (isa_address == 0x0000) |
3330 | return nboard; |
3331 | |
3332 | /* probe for CD1400... */ |
3333 | cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin); |
3334 | if (cy_isa_address == NULL) { |
3335 | printk(KERN_ERR "Cyclom-Y/ISA: can't remap base " |
3336 | "address\n"); |
3337 | continue; |
3338 | } |
3339 | cy_isa_nchan = CyPORTS_PER_CHIP * |
3340 | cyy_init_card(cy_isa_address, 0); |
3341 | if (cy_isa_nchan == 0) { |
3342 | iounmap(cy_isa_address); |
3343 | continue; |
3344 | } |
3345 | |
3346 | if (isparam && i < NR_CARDS && irq[i]) |
3347 | cy_isa_irq = irq[i]; |
3348 | else |
3349 | /* find out the board's irq by probing */ |
3350 | cy_isa_irq = detect_isa_irq(cy_isa_address); |
3351 | if (cy_isa_irq == 0) { |
3352 | printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the " |
3353 | "IRQ could not be detected.\n", |
3354 | (unsigned long)cy_isa_address); |
3355 | iounmap(cy_isa_address); |
3356 | continue; |
3357 | } |
3358 | |
3359 | if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) { |
3360 | printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " |
3361 | "more channels are available. Change NR_PORTS " |
3362 | "in cyclades.c and recompile kernel.\n", |
3363 | (unsigned long)cy_isa_address); |
3364 | iounmap(cy_isa_address); |
3365 | return nboard; |
3366 | } |
3367 | /* fill the next cy_card structure available */ |
3368 | for (j = 0; j < NR_CARDS; j++) { |
3369 | if (cy_card[j].base_addr == NULL) |
3370 | break; |
3371 | } |
3372 | if (j == NR_CARDS) { /* no more cy_cards available */ |
3373 | printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " |
3374 | "more cards can be used. Change NR_CARDS in " |
3375 | "cyclades.c and recompile kernel.\n", |
3376 | (unsigned long)cy_isa_address); |
3377 | iounmap(cy_isa_address); |
3378 | return nboard; |
3379 | } |
3380 | |
3381 | /* allocate IRQ */ |
3382 | if (request_irq(cy_isa_irq, cyy_interrupt, |
3383 | IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) { |
3384 | printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but " |
3385 | "could not allocate IRQ#%d.\n", |
3386 | (unsigned long)cy_isa_address, cy_isa_irq); |
3387 | iounmap(cy_isa_address); |
3388 | return nboard; |
3389 | } |
3390 | |
3391 | /* set cy_card */ |
3392 | cy_card[j].base_addr = cy_isa_address; |
3393 | cy_card[j].ctl_addr.p9050 = NULL; |
3394 | cy_card[j].irq = (int)cy_isa_irq; |
3395 | cy_card[j].bus_index = 0; |
3396 | cy_card[j].first_line = cy_next_channel; |
3397 | cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP; |
3398 | cy_card[j].nports = cy_isa_nchan; |
3399 | if (cy_init_card(&cy_card[j])) { |
3400 | cy_card[j].base_addr = NULL; |
3401 | free_irq(cy_isa_irq, &cy_card[j]); |
3402 | iounmap(cy_isa_address); |
3403 | continue; |
3404 | } |
3405 | nboard++; |
3406 | |
3407 | printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: " |
3408 | "%d channels starting from port %d\n", |
3409 | j + 1, (unsigned long)cy_isa_address, |
3410 | (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)), |
3411 | cy_isa_irq, cy_isa_nchan, cy_next_channel); |
3412 | |
3413 | for (j = cy_next_channel; |
3414 | j < cy_next_channel + cy_isa_nchan; j++) |
3415 | tty_register_device(cy_serial_driver, j, NULL); |
3416 | cy_next_channel += cy_isa_nchan; |
3417 | } |
3418 | return nboard; |
3419 | #else |
3420 | return 0; |
3421 | #endif /* CONFIG_ISA */ |
3422 | } /* cy_detect_isa */ |
3423 | |
3424 | #ifdef CONFIG_PCI |
3425 | static inline int __devinit cyc_isfwstr(const char *str, unsigned int size) |
3426 | { |
3427 | unsigned int a; |
3428 | |
3429 | for (a = 0; a < size && *str; a++, str++) |
3430 | if (*str & 0x80) |
3431 | return -EINVAL; |
3432 | |
3433 | for (; a < size; a++, str++) |
3434 | if (*str) |
3435 | return -EINVAL; |
3436 | |
3437 | return 0; |
3438 | } |
3439 | |
3440 | static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data, |
3441 | unsigned int size) |
3442 | { |
3443 | for (; size > 0; size--) { |
3444 | cy_writel(fpga, *data++); |
3445 | udelay(10); |
3446 | } |
3447 | } |
3448 | |
3449 | static void __devinit plx_init(struct pci_dev *pdev, int irq, |
3450 | struct RUNTIME_9060 __iomem *addr) |
3451 | { |
3452 | /* Reset PLX */ |
3453 | cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000); |
3454 | udelay(100L); |
3455 | cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000); |
3456 | |
3457 | /* Reload Config. Registers from EEPROM */ |
3458 | cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000); |
3459 | udelay(100L); |
3460 | cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000); |
3461 | |
3462 | /* For some yet unknown reason, once the PLX9060 reloads the EEPROM, |
3463 | * the IRQ is lost and, thus, we have to re-write it to the PCI config. |
3464 | * registers. This will remain here until we find a permanent fix. |
3465 | */ |
3466 | pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq); |
3467 | } |
3468 | |
3469 | static int __devinit __cyz_load_fw(const struct firmware *fw, |
3470 | const char *name, const u32 mailbox, void __iomem *base, |
3471 | void __iomem *fpga) |
3472 | { |
3473 | const void *ptr = fw->data; |
3474 | const struct zfile_header *h = ptr; |
3475 | const struct zfile_config *c, *cs; |
3476 | const struct zfile_block *b, *bs; |
3477 | unsigned int a, tmp, len = fw->size; |
3478 | #define BAD_FW KERN_ERR "Bad firmware: " |
3479 | if (len < sizeof(*h)) { |
3480 | printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h)); |
3481 | return -EINVAL; |
3482 | } |
3483 | |
3484 | cs = ptr + h->config_offset; |
3485 | bs = ptr + h->block_offset; |
3486 | |
3487 | if ((void *)(cs + h->n_config) > ptr + len || |
3488 | (void *)(bs + h->n_blocks) > ptr + len) { |
3489 | printk(BAD_FW "too short"); |
3490 | return -EINVAL; |
3491 | } |
3492 | |
3493 | if (cyc_isfwstr(h->name, sizeof(h->name)) || |
3494 | cyc_isfwstr(h->date, sizeof(h->date))) { |
3495 | printk(BAD_FW "bad formatted header string\n"); |
3496 | return -EINVAL; |
3497 | } |
3498 | |
3499 | if (strncmp(name, h->name, sizeof(h->name))) { |
3500 | printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name); |
3501 | return -EINVAL; |
3502 | } |
3503 | |
3504 | tmp = 0; |
3505 | for (c = cs; c < cs + h->n_config; c++) { |
3506 | for (a = 0; a < c->n_blocks; a++) |
3507 | if (c->block_list[a] > h->n_blocks) { |
3508 | printk(BAD_FW "bad block ref number in cfgs\n"); |
3509 | return -EINVAL; |
3510 | } |
3511 | if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */ |
3512 | tmp++; |
3513 | } |
3514 | if (!tmp) { |
3515 | printk(BAD_FW "nothing appropriate\n"); |
3516 | return -EINVAL; |
3517 | } |
3518 | |
3519 | for (b = bs; b < bs + h->n_blocks; b++) |
3520 | if (b->file_offset + b->size > len) { |
3521 | printk(BAD_FW "bad block data offset\n"); |
3522 | return -EINVAL; |
3523 | } |
3524 | |
3525 | /* everything is OK, let's seek'n'load it */ |
3526 | for (c = cs; c < cs + h->n_config; c++) |
3527 | if (c->mailbox == mailbox && c->function == 0) |
3528 | break; |
3529 | |
3530 | for (a = 0; a < c->n_blocks; a++) { |
3531 | b = &bs[c->block_list[a]]; |
3532 | if (b->type == ZBLOCK_FPGA) { |
3533 | if (fpga != NULL) |
3534 | cyz_fpga_copy(fpga, ptr + b->file_offset, |
3535 | b->size); |
3536 | } else { |
3537 | if (base != NULL) |
3538 | memcpy_toio(base + b->ram_offset, |
3539 | ptr + b->file_offset, b->size); |
3540 | } |
3541 | } |
3542 | #undef BAD_FW |
3543 | return 0; |
3544 | } |
3545 | |
3546 | static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr, |
3547 | struct RUNTIME_9060 __iomem *ctl_addr, int irq) |
3548 | { |
3549 | const struct firmware *fw; |
3550 | struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS; |
3551 | struct CUSTOM_REG __iomem *cust = base_addr; |
3552 | struct ZFW_CTRL __iomem *pt_zfwctrl; |
3553 | void __iomem *tmp; |
3554 | u32 mailbox, status, nchan; |
3555 | unsigned int i; |
3556 | int retval; |
3557 | |
3558 | retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev); |
3559 | if (retval) { |
3560 | dev_err(&pdev->dev, "can't get firmware\n"); |
3561 | goto err; |
3562 | } |
3563 | |
3564 | /* Check whether the firmware is already loaded and running. If |
3565 | positive, skip this board */ |
3566 | if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) { |
3567 | u32 cntval = readl(base_addr + 0x190); |
3568 | |
3569 | udelay(100); |
3570 | if (cntval != readl(base_addr + 0x190)) { |
3571 | /* FW counter is working, FW is running */ |
3572 | dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. " |
3573 | "Skipping board.\n"); |
3574 | retval = 0; |
3575 | goto err_rel; |
3576 | } |
3577 | } |
3578 | |
3579 | /* start boot */ |
3580 | cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) & |
3581 | ~0x00030800UL); |
3582 | |
3583 | mailbox = readl(&ctl_addr->mail_box_0); |
3584 | |
3585 | if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) { |
3586 | /* stops CPU and set window to beginning of RAM */ |
3587 | cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
3588 | cy_writel(&cust->cpu_stop, 0); |
3589 | cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
3590 | udelay(100); |
3591 | } |
3592 | |
3593 | plx_init(pdev, irq, ctl_addr); |
3594 | |
3595 | if (mailbox != 0) { |
3596 | /* load FPGA */ |
3597 | retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL, |
3598 | base_addr); |
3599 | if (retval) |
3600 | goto err_rel; |
3601 | if (!__cyz_fpga_loaded(ctl_addr)) { |
3602 | dev_err(&pdev->dev, "fw upload successful, but fw is " |
3603 | "not loaded\n"); |
3604 | goto err_rel; |
3605 | } |
3606 | } |
3607 | |
3608 | /* stops CPU and set window to beginning of RAM */ |
3609 | cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
3610 | cy_writel(&cust->cpu_stop, 0); |
3611 | cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
3612 | udelay(100); |
3613 | |
3614 | /* clear memory */ |
3615 | for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++) |
3616 | cy_writeb(tmp, 255); |
3617 | if (mailbox != 0) { |
3618 | /* set window to last 512K of RAM */ |
3619 | cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE); |
3620 | for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++) |
3621 | cy_writeb(tmp, 255); |
3622 | /* set window to beginning of RAM */ |
3623 | cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
3624 | } |
3625 | |
3626 | retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL); |
3627 | release_firmware(fw); |
3628 | if (retval) |
3629 | goto err; |
3630 | |
3631 | /* finish boot and start boards */ |
3632 | cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
3633 | cy_writel(&cust->cpu_start, 0); |
3634 | cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
3635 | i = 0; |
3636 | while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40) |
3637 | msleep(100); |
3638 | if (status != ZFIRM_ID) { |
3639 | if (status == ZFIRM_HLT) { |
3640 | dev_err(&pdev->dev, "you need an external power supply " |
3641 | "for this number of ports. Firmware halted and " |
3642 | "board reset.\n"); |
3643 | retval = -EIO; |
3644 | goto err; |
3645 | } |
3646 | dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting " |
3647 | "some more time\n", status); |
3648 | while ((status = readl(&fid->signature)) != ZFIRM_ID && |
3649 | i++ < 200) |
3650 | msleep(100); |
3651 | if (status != ZFIRM_ID) { |
3652 | dev_err(&pdev->dev, "Board not started in 20 seconds! " |
3653 | "Giving up. (fid->signature = 0x%x)\n", |
3654 | status); |
3655 | dev_info(&pdev->dev, "*** Warning ***: if you are " |
3656 | "upgrading the FW, please power cycle the " |
3657 | "system before loading the new FW to the " |
3658 | "Cyclades-Z.\n"); |
3659 | |
3660 | if (__cyz_fpga_loaded(ctl_addr)) |
3661 | plx_init(pdev, irq, ctl_addr); |
3662 | |
3663 | retval = -EIO; |
3664 | goto err; |
3665 | } |
3666 | dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n", |
3667 | i / 10); |
3668 | } |
3669 | pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr); |
3670 | |
3671 | dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n", |
3672 | base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr), |
3673 | base_addr + readl(&fid->zfwctrl_addr)); |
3674 | |
3675 | nchan = readl(&pt_zfwctrl->board_ctrl.n_channel); |
3676 | dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n", |
3677 | readl(&pt_zfwctrl->board_ctrl.fw_version), nchan); |
3678 | |
3679 | if (nchan == 0) { |
3680 | dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please " |
3681 | "check the connection between the Z host card and the " |
3682 | "serial expanders.\n"); |
3683 | |
3684 | if (__cyz_fpga_loaded(ctl_addr)) |
3685 | plx_init(pdev, irq, ctl_addr); |
3686 | |
3687 | dev_info(&pdev->dev, "Null number of ports detected. Board " |
3688 | "reset.\n"); |
3689 | retval = 0; |
3690 | goto err; |
3691 | } |
3692 | |
3693 | cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX); |
3694 | cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION); |
3695 | |
3696 | /* |
3697 | Early firmware failed to start looking for commands. |
3698 | This enables firmware interrupts for those commands. |
3699 | */ |
3700 | cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | |
3701 | (1 << 17)); |
3702 | cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | |
3703 | 0x00030800UL); |
3704 | |
3705 | return nchan; |
3706 | err_rel: |
3707 | release_firmware(fw); |
3708 | err: |
3709 | return retval; |
3710 | } |
3711 | |
3712 | static int __devinit cy_pci_probe(struct pci_dev *pdev, |
3713 | const struct pci_device_id *ent) |
3714 | { |
3715 | void __iomem *addr0 = NULL, *addr2 = NULL; |
3716 | char *card_name = NULL; |
3717 | u32 uninitialized_var(mailbox); |
3718 | unsigned int device_id, nchan = 0, card_no, i; |
3719 | unsigned char plx_ver; |
3720 | int retval, irq; |
3721 | |
3722 | retval = pci_enable_device(pdev); |
3723 | if (retval) { |
3724 | dev_err(&pdev->dev, "cannot enable device\n"); |
3725 | goto err; |
3726 | } |
3727 | |
3728 | /* read PCI configuration area */ |
3729 | irq = pdev->irq; |
3730 | device_id = pdev->device & ~PCI_DEVICE_ID_MASK; |
3731 | |
3732 | #if defined(__alpha__) |
3733 | if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */ |
3734 | dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low " |
3735 | "addresses on Alpha systems.\n"); |
3736 | retval = -EIO; |
3737 | goto err_dis; |
3738 | } |
3739 | #endif |
3740 | if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) { |
3741 | dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low " |
3742 | "addresses\n"); |
3743 | retval = -EIO; |
3744 | goto err_dis; |
3745 | } |
3746 | |
3747 | if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) { |
3748 | dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring " |
3749 | "it...\n"); |
3750 | pdev->resource[2].flags &= ~IORESOURCE_IO; |
3751 | } |
3752 | |
3753 | retval = pci_request_regions(pdev, "cyclades"); |
3754 | if (retval) { |
3755 | dev_err(&pdev->dev, "failed to reserve resources\n"); |
3756 | goto err_dis; |
3757 | } |
3758 | |
3759 | retval = -EIO; |
3760 | if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
3761 | device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { |
3762 | card_name = "Cyclom-Y"; |
3763 | |
3764 | addr0 = ioremap_nocache(pci_resource_start(pdev, 0), |
3765 | CyPCI_Yctl); |
3766 | if (addr0 == NULL) { |
3767 | dev_err(&pdev->dev, "can't remap ctl region\n"); |
3768 | goto err_reg; |
3769 | } |
3770 | addr2 = ioremap_nocache(pci_resource_start(pdev, 2), |
3771 | CyPCI_Ywin); |
3772 | if (addr2 == NULL) { |
3773 | dev_err(&pdev->dev, "can't remap base region\n"); |
3774 | goto err_unmap; |
3775 | } |
3776 | |
3777 | nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1); |
3778 | if (nchan == 0) { |
3779 | dev_err(&pdev->dev, "Cyclom-Y PCI host card with no " |
3780 | "Serial-Modules\n"); |
3781 | goto err_unmap; |
3782 | } |
3783 | } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) { |
3784 | struct RUNTIME_9060 __iomem *ctl_addr; |
3785 | |
3786 | ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0), |
3787 | CyPCI_Zctl); |
3788 | if (addr0 == NULL) { |
3789 | dev_err(&pdev->dev, "can't remap ctl region\n"); |
3790 | goto err_reg; |
3791 | } |
3792 | |
3793 | /* Disable interrupts on the PLX before resetting it */ |
3794 | cy_writew(&ctl_addr->intr_ctrl_stat, |
3795 | readw(&ctl_addr->intr_ctrl_stat) & ~0x0900); |
3796 | |
3797 | plx_init(pdev, irq, addr0); |
3798 | |
3799 | mailbox = readl(&ctl_addr->mail_box_0); |
3800 | |
3801 | addr2 = ioremap_nocache(pci_resource_start(pdev, 2), |
3802 | mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin); |
3803 | if (addr2 == NULL) { |
3804 | dev_err(&pdev->dev, "can't remap base region\n"); |
3805 | goto err_unmap; |
3806 | } |
3807 | |
3808 | if (mailbox == ZE_V1) { |
3809 | card_name = "Cyclades-Ze"; |
3810 | } else { |
3811 | card_name = "Cyclades-8Zo"; |
3812 | #ifdef CY_PCI_DEBUG |
3813 | if (mailbox == ZO_V1) { |
3814 | cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
3815 | dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA " |
3816 | "id %lx, ver %lx\n", (ulong)(0xff & |
3817 | readl(&((struct CUSTOM_REG *)addr2)-> |
3818 | fpga_id)), (ulong)(0xff & |
3819 | readl(&((struct CUSTOM_REG *)addr2)-> |
3820 | fpga_version))); |
3821 | cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
3822 | } else { |
3823 | dev_info(&pdev->dev, "Cyclades-Z/PCI: New " |
3824 | "Cyclades-Z board. FPGA not loaded\n"); |
3825 | } |
3826 | #endif |
3827 | /* The following clears the firmware id word. This |
3828 | ensures that the driver will not attempt to talk to |
3829 | the board until it has been properly initialized. |
3830 | */ |
3831 | if ((mailbox == ZO_V1) || (mailbox == ZO_V2)) |
3832 | cy_writel(addr2 + ID_ADDRESS, 0L); |
3833 | } |
3834 | |
3835 | retval = cyz_load_fw(pdev, addr2, addr0, irq); |
3836 | if (retval <= 0) |
3837 | goto err_unmap; |
3838 | nchan = retval; |
3839 | } |
3840 | |
3841 | if ((cy_next_channel + nchan) > NR_PORTS) { |
3842 | dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " |
3843 | "channels are available. Change NR_PORTS in " |
3844 | "cyclades.c and recompile kernel.\n"); |
3845 | goto err_unmap; |
3846 | } |
3847 | /* fill the next cy_card structure available */ |
3848 | for (card_no = 0; card_no < NR_CARDS; card_no++) { |
3849 | if (cy_card[card_no].base_addr == NULL) |
3850 | break; |
3851 | } |
3852 | if (card_no == NR_CARDS) { /* no more cy_cards available */ |
3853 | dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " |
3854 | "more cards can be used. Change NR_CARDS in " |
3855 | "cyclades.c and recompile kernel.\n"); |
3856 | goto err_unmap; |
3857 | } |
3858 | |
3859 | if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
3860 | device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { |
3861 | /* allocate IRQ */ |
3862 | retval = request_irq(irq, cyy_interrupt, |
3863 | IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]); |
3864 | if (retval) { |
3865 | dev_err(&pdev->dev, "could not allocate IRQ\n"); |
3866 | goto err_unmap; |
3867 | } |
3868 | cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP; |
3869 | } else { |
3870 | struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS; |
3871 | struct ZFW_CTRL __iomem *zfw_ctrl; |
3872 | |
3873 | zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
3874 | |
3875 | cy_card[card_no].hw_ver = mailbox; |
3876 | cy_card[card_no].num_chips = (unsigned int)-1; |
3877 | cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl; |
3878 | #ifdef CONFIG_CYZ_INTR |
3879 | /* allocate IRQ only if board has an IRQ */ |
3880 | if (irq != 0 && irq != 255) { |
3881 | retval = request_irq(irq, cyz_interrupt, |
3882 | IRQF_SHARED, "Cyclades-Z", |
3883 | &cy_card[card_no]); |
3884 | if (retval) { |
3885 | dev_err(&pdev->dev, "could not allocate IRQ\n"); |
3886 | goto err_unmap; |
3887 | } |
3888 | } |
3889 | #endif /* CONFIG_CYZ_INTR */ |
3890 | } |
3891 | |
3892 | /* set cy_card */ |
3893 | cy_card[card_no].base_addr = addr2; |
3894 | cy_card[card_no].ctl_addr.p9050 = addr0; |
3895 | cy_card[card_no].irq = irq; |
3896 | cy_card[card_no].bus_index = 1; |
3897 | cy_card[card_no].first_line = cy_next_channel; |
3898 | cy_card[card_no].nports = nchan; |
3899 | retval = cy_init_card(&cy_card[card_no]); |
3900 | if (retval) |
3901 | goto err_null; |
3902 | |
3903 | pci_set_drvdata(pdev, &cy_card[card_no]); |
3904 | |
3905 | if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
3906 | device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { |
3907 | /* enable interrupts in the PCI interface */ |
3908 | plx_ver = readb(addr2 + CyPLX_VER) & 0x0f; |
3909 | switch (plx_ver) { |
3910 | case PLX_9050: |
3911 | cy_writeb(addr0 + 0x4c, 0x43); |
3912 | break; |
3913 | |
3914 | case PLX_9060: |
3915 | case PLX_9080: |
3916 | default: /* Old boards, use PLX_9060 */ |
3917 | { |
3918 | struct RUNTIME_9060 __iomem *ctl_addr = addr0; |
3919 | plx_init(pdev, irq, ctl_addr); |
3920 | cy_writew(&ctl_addr->intr_ctrl_stat, |
3921 | readw(&ctl_addr->intr_ctrl_stat) | 0x0900); |
3922 | break; |
3923 | } |
3924 | } |
3925 | } |
3926 | |
3927 | dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from " |
3928 | "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel); |
3929 | for (i = cy_next_channel; i < cy_next_channel + nchan; i++) |
3930 | tty_register_device(cy_serial_driver, i, &pdev->dev); |
3931 | cy_next_channel += nchan; |
3932 | |
3933 | return 0; |
3934 | err_null: |
3935 | cy_card[card_no].base_addr = NULL; |
3936 | free_irq(irq, &cy_card[card_no]); |
3937 | err_unmap: |
3938 | iounmap(addr0); |
3939 | if (addr2) |
3940 | iounmap(addr2); |
3941 | err_reg: |
3942 | pci_release_regions(pdev); |
3943 | err_dis: |
3944 | pci_disable_device(pdev); |
3945 | err: |
3946 | return retval; |
3947 | } |
3948 | |
3949 | static void __devexit cy_pci_remove(struct pci_dev *pdev) |
3950 | { |
3951 | struct cyclades_card *cinfo = pci_get_drvdata(pdev); |
3952 | unsigned int i; |
3953 | |
3954 | /* non-Z with old PLX */ |
3955 | if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) == |
3956 | PLX_9050) |
3957 | cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0); |
3958 | else |
3959 | #ifndef CONFIG_CYZ_INTR |
3960 | if (!cy_is_Z(cinfo)) |
3961 | #endif |
3962 | cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat, |
3963 | readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) & |
3964 | ~0x0900); |
3965 | |
3966 | iounmap(cinfo->base_addr); |
3967 | if (cinfo->ctl_addr.p9050) |
3968 | iounmap(cinfo->ctl_addr.p9050); |
3969 | if (cinfo->irq |
3970 | #ifndef CONFIG_CYZ_INTR |
3971 | && !cy_is_Z(cinfo) |
3972 | #endif /* CONFIG_CYZ_INTR */ |
3973 | ) |
3974 | free_irq(cinfo->irq, cinfo); |
3975 | pci_release_regions(pdev); |
3976 | |
3977 | cinfo->base_addr = NULL; |
3978 | for (i = cinfo->first_line; i < cinfo->first_line + |
3979 | cinfo->nports; i++) |
3980 | tty_unregister_device(cy_serial_driver, i); |
3981 | cinfo->nports = 0; |
3982 | kfree(cinfo->ports); |
3983 | } |
3984 | |
3985 | static struct pci_driver cy_pci_driver = { |
3986 | .name = "cyclades", |
3987 | .id_table = cy_pci_dev_id, |
3988 | .probe = cy_pci_probe, |
3989 | .remove = __devexit_p(cy_pci_remove) |
3990 | }; |
3991 | #endif |
3992 | |
3993 | static int cyclades_proc_show(struct seq_file *m, void *v) |
3994 | { |
3995 | struct cyclades_port *info; |
3996 | unsigned int i, j; |
3997 | __u32 cur_jifs = jiffies; |
3998 | |
3999 | seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn " |
4000 | "IdleIn Overruns Ldisc\n"); |
4001 | |
4002 | /* Output one line for each known port */ |
4003 | for (i = 0; i < NR_CARDS; i++) |
4004 | for (j = 0; j < cy_card[i].nports; j++) { |
4005 | info = &cy_card[i].ports[j]; |
4006 | |
4007 | if (info->port.count) { |
4008 | /* XXX is the ldisc num worth this? */ |
4009 | struct tty_struct *tty; |
4010 | struct tty_ldisc *ld; |
4011 | int num = 0; |
4012 | tty = tty_port_tty_get(&info->port); |
4013 | if (tty) { |
4014 | ld = tty_ldisc_ref(tty); |
4015 | if (ld) { |
4016 | num = ld->ops->num; |
4017 | tty_ldisc_deref(ld); |
4018 | } |
4019 | tty_kref_put(tty); |
4020 | } |
4021 | seq_printf(m, "%3d %8lu %10lu %8lu " |
4022 | "%10lu %8lu %9lu %6d\n", info->line, |
4023 | (cur_jifs - info->idle_stats.in_use) / |
4024 | HZ, info->idle_stats.xmit_bytes, |
4025 | (cur_jifs - info->idle_stats.xmit_idle)/ |
4026 | HZ, info->idle_stats.recv_bytes, |
4027 | (cur_jifs - info->idle_stats.recv_idle)/ |
4028 | HZ, info->idle_stats.overruns, |
4029 | num); |
4030 | } else |
4031 | seq_printf(m, "%3d %8lu %10lu %8lu " |
4032 | "%10lu %8lu %9lu %6ld\n", |
4033 | info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L); |
4034 | } |
4035 | return 0; |
4036 | } |
4037 | |
4038 | static int cyclades_proc_open(struct inode *inode, struct file *file) |
4039 | { |
4040 | return single_open(file, cyclades_proc_show, NULL); |
4041 | } |
4042 | |
4043 | static const struct file_operations cyclades_proc_fops = { |
4044 | .owner = THIS_MODULE, |
4045 | .open = cyclades_proc_open, |
4046 | .read = seq_read, |
4047 | .llseek = seq_lseek, |
4048 | .release = single_release, |
4049 | }; |
4050 | |
4051 | /* The serial driver boot-time initialization code! |
4052 | Hardware I/O ports are mapped to character special devices on a |
4053 | first found, first allocated manner. That is, this code searches |
4054 | for Cyclom cards in the system. As each is found, it is probed |
4055 | to discover how many chips (and thus how many ports) are present. |
4056 | These ports are mapped to the tty ports 32 and upward in monotonic |
4057 | fashion. If an 8-port card is replaced with a 16-port card, the |
4058 | port mapping on a following card will shift. |
4059 | |
4060 | This approach is different from what is used in the other serial |
4061 | device driver because the Cyclom is more properly a multiplexer, |
4062 | not just an aggregation of serial ports on one card. |
4063 | |
4064 | If there are more cards with more ports than have been |
4065 | statically allocated above, a warning is printed and the |
4066 | extra ports are ignored. |
4067 | */ |
4068 | |
4069 | static const struct tty_operations cy_ops = { |
4070 | .open = cy_open, |
4071 | .close = cy_close, |
4072 | .write = cy_write, |
4073 | .put_char = cy_put_char, |
4074 | .flush_chars = cy_flush_chars, |
4075 | .write_room = cy_write_room, |
4076 | .chars_in_buffer = cy_chars_in_buffer, |
4077 | .flush_buffer = cy_flush_buffer, |
4078 | .ioctl = cy_ioctl, |
4079 | .throttle = cy_throttle, |
4080 | .unthrottle = cy_unthrottle, |
4081 | .set_termios = cy_set_termios, |
4082 | .stop = cy_stop, |
4083 | .start = cy_start, |
4084 | .hangup = cy_hangup, |
4085 | .break_ctl = cy_break, |
4086 | .wait_until_sent = cy_wait_until_sent, |
4087 | .tiocmget = cy_tiocmget, |
4088 | .tiocmset = cy_tiocmset, |
4089 | .get_icount = cy_get_icount, |
4090 | .proc_fops = &cyclades_proc_fops, |
4091 | }; |
4092 | |
4093 | static int __init cy_init(void) |
4094 | { |
4095 | unsigned int nboards; |
4096 | int retval = -ENOMEM; |
4097 | |
4098 | cy_serial_driver = alloc_tty_driver(NR_PORTS); |
4099 | if (!cy_serial_driver) |
4100 | goto err; |
4101 | |
4102 | printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n", |
4103 | __DATE__, __TIME__); |
4104 | |
4105 | /* Initialize the tty_driver structure */ |
4106 | |
4107 | cy_serial_driver->owner = THIS_MODULE; |
4108 | cy_serial_driver->driver_name = "cyclades"; |
4109 | cy_serial_driver->name = "ttyC"; |
4110 | cy_serial_driver->major = CYCLADES_MAJOR; |
4111 | cy_serial_driver->minor_start = 0; |
4112 | cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
4113 | cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; |
4114 | cy_serial_driver->init_termios = tty_std_termios; |
4115 | cy_serial_driver->init_termios.c_cflag = |
4116 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
4117 | cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
4118 | tty_set_operations(cy_serial_driver, &cy_ops); |
4119 | |
4120 | retval = tty_register_driver(cy_serial_driver); |
4121 | if (retval) { |
4122 | printk(KERN_ERR "Couldn't register Cyclades serial driver\n"); |
4123 | goto err_frtty; |
4124 | } |
4125 | |
4126 | /* the code below is responsible to find the boards. Each different |
4127 | type of board has its own detection routine. If a board is found, |
4128 | the next cy_card structure available is set by the detection |
4129 | routine. These functions are responsible for checking the |
4130 | availability of cy_card and cy_port data structures and updating |
4131 | the cy_next_channel. */ |
4132 | |
4133 | /* look for isa boards */ |
4134 | nboards = cy_detect_isa(); |
4135 | |
4136 | #ifdef CONFIG_PCI |
4137 | /* look for pci boards */ |
4138 | retval = pci_register_driver(&cy_pci_driver); |
4139 | if (retval && !nboards) { |
4140 | tty_unregister_driver(cy_serial_driver); |
4141 | goto err_frtty; |
4142 | } |
4143 | #endif |
4144 | |
4145 | return 0; |
4146 | err_frtty: |
4147 | put_tty_driver(cy_serial_driver); |
4148 | err: |
4149 | return retval; |
4150 | } /* cy_init */ |
4151 | |
4152 | static void __exit cy_cleanup_module(void) |
4153 | { |
4154 | struct cyclades_card *card; |
4155 | unsigned int i, e1; |
4156 | |
4157 | #ifndef CONFIG_CYZ_INTR |
4158 | del_timer_sync(&cyz_timerlist); |
4159 | #endif /* CONFIG_CYZ_INTR */ |
4160 | |
4161 | e1 = tty_unregister_driver(cy_serial_driver); |
4162 | if (e1) |
4163 | printk(KERN_ERR "failed to unregister Cyclades serial " |
4164 | "driver(%d)\n", e1); |
4165 | |
4166 | #ifdef CONFIG_PCI |
4167 | pci_unregister_driver(&cy_pci_driver); |
4168 | #endif |
4169 | |
4170 | for (i = 0; i < NR_CARDS; i++) { |
4171 | card = &cy_card[i]; |
4172 | if (card->base_addr) { |
4173 | /* clear interrupt */ |
4174 | cy_writeb(card->base_addr + Cy_ClrIntr, 0); |
4175 | iounmap(card->base_addr); |
4176 | if (card->ctl_addr.p9050) |
4177 | iounmap(card->ctl_addr.p9050); |
4178 | if (card->irq |
4179 | #ifndef CONFIG_CYZ_INTR |
4180 | && !cy_is_Z(card) |
4181 | #endif /* CONFIG_CYZ_INTR */ |
4182 | ) |
4183 | free_irq(card->irq, card); |
4184 | for (e1 = card->first_line; e1 < card->first_line + |
4185 | card->nports; e1++) |
4186 | tty_unregister_device(cy_serial_driver, e1); |
4187 | kfree(card->ports); |
4188 | } |
4189 | } |
4190 | |
4191 | put_tty_driver(cy_serial_driver); |
4192 | } /* cy_cleanup_module */ |
4193 | |
4194 | module_init(cy_init); |
4195 | module_exit(cy_cleanup_module); |
4196 | |
4197 | MODULE_LICENSE("GPL"); |
4198 | MODULE_VERSION(CY_VERSION); |
4199 | MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR); |
4200 | MODULE_FIRMWARE("cyzfirm.bin"); |
4201 |
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