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1 | /* |
2 | * Copyright (C) 1996-2001 Linus Torvalds & author (see below) |
3 | */ |
4 | |
5 | /* |
6 | * Version 0.03 Cleaned auto-tune, added probe |
7 | * Version 0.04 Added second channel tuning |
8 | * Version 0.05 Enhanced tuning ; added qd6500 support |
9 | * Version 0.06 Added dos driver's list |
10 | * Version 0.07 Second channel bug fix |
11 | * |
12 | * QDI QD6500/QD6580 EIDE controller fast support |
13 | * |
14 | * To activate controller support, use "ide0=qd65xx" |
15 | */ |
16 | |
17 | /* |
18 | * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by |
19 | * Samuel Thibault <samuel.thibault@ens-lyon.org> |
20 | */ |
21 | |
22 | #include <linux/module.h> |
23 | #include <linux/types.h> |
24 | #include <linux/kernel.h> |
25 | #include <linux/delay.h> |
26 | #include <linux/timer.h> |
27 | #include <linux/mm.h> |
28 | #include <linux/ioport.h> |
29 | #include <linux/blkdev.h> |
30 | #include <linux/ide.h> |
31 | #include <linux/init.h> |
32 | #include <asm/system.h> |
33 | #include <asm/io.h> |
34 | |
35 | #define DRV_NAME "qd65xx" |
36 | |
37 | #include "qd65xx.h" |
38 | |
39 | /* |
40 | * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580) |
41 | * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580) |
42 | * -- qd6500 is a single IDE interface |
43 | * -- qd6580 is a dual IDE interface |
44 | * |
45 | * More research on qd6580 being done by willmore@cig.mot.com (David) |
46 | * More Information given by Petr Soucek (petr@ryston.cz) |
47 | * http://www.ryston.cz/petr/vlb |
48 | */ |
49 | |
50 | /* |
51 | * base: Timer1 |
52 | * |
53 | * |
54 | * base+0x01: Config (R/O) |
55 | * |
56 | * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500) |
57 | * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30 |
58 | * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz |
59 | * bit 3: qd6500: 1 = disabled, 0 = enabled |
60 | * qd6580: 1 |
61 | * upper nibble: |
62 | * qd6500: 1100 |
63 | * qd6580: either 1010 or 0101 |
64 | * |
65 | * |
66 | * base+0x02: Timer2 (qd6580 only) |
67 | * |
68 | * |
69 | * base+0x03: Control (qd6580 only) |
70 | * |
71 | * bits 0-3 must always be set 1 |
72 | * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock |
73 | * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb |
74 | * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb |
75 | * channel 1 for hdc & hdd |
76 | * bit 1 : 1 = only disks on primary port |
77 | * 0 = disks & ATAPI devices on primary port |
78 | * bit 2-4 : always 0 |
79 | * bit 5 : status, but of what ? |
80 | * bit 6 : always set 1 by dos driver |
81 | * bit 7 : set 1 for non-ATAPI devices on primary port |
82 | * (maybe read-ahead and post-write buffer ?) |
83 | */ |
84 | |
85 | static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */ |
86 | |
87 | /* |
88 | * qd65xx_select: |
89 | * |
90 | * This routine is invoked to prepare for access to a given drive. |
91 | */ |
92 | |
93 | static void qd65xx_dev_select(ide_drive_t *drive) |
94 | { |
95 | u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) | |
96 | (QD_TIMREG(drive) & 0x02); |
97 | |
98 | if (timings[index] != QD_TIMING(drive)) |
99 | outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive)); |
100 | |
101 | outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr); |
102 | } |
103 | |
104 | /* |
105 | * qd6500_compute_timing |
106 | * |
107 | * computes the timing value where |
108 | * lower nibble represents active time, in count of VLB clocks |
109 | * upper nibble represents recovery time, in count of VLB clocks |
110 | */ |
111 | |
112 | static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time) |
113 | { |
114 | int clk = ide_vlb_clk ? ide_vlb_clk : 50; |
115 | u8 act_cyc, rec_cyc; |
116 | |
117 | if (clk <= 33) { |
118 | act_cyc = 9 - IDE_IN(active_time * clk / 1000 + 1, 2, 9); |
119 | rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15); |
120 | } else { |
121 | act_cyc = 8 - IDE_IN(active_time * clk / 1000 + 1, 1, 8); |
122 | rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18); |
123 | } |
124 | |
125 | return (rec_cyc << 4) | 0x08 | act_cyc; |
126 | } |
127 | |
128 | /* |
129 | * qd6580_compute_timing |
130 | * |
131 | * idem for qd6580 |
132 | */ |
133 | |
134 | static u8 qd6580_compute_timing (int active_time, int recovery_time) |
135 | { |
136 | int clk = ide_vlb_clk ? ide_vlb_clk : 50; |
137 | u8 act_cyc, rec_cyc; |
138 | |
139 | act_cyc = 17 - IDE_IN(active_time * clk / 1000 + 1, 2, 17); |
140 | rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15); |
141 | |
142 | return (rec_cyc << 4) | act_cyc; |
143 | } |
144 | |
145 | /* |
146 | * qd_find_disk_type |
147 | * |
148 | * tries to find timing from dos driver's table |
149 | */ |
150 | |
151 | static int qd_find_disk_type (ide_drive_t *drive, |
152 | int *active_time, int *recovery_time) |
153 | { |
154 | struct qd65xx_timing_s *p; |
155 | char *m = (char *)&drive->id[ATA_ID_PROD]; |
156 | char model[ATA_ID_PROD_LEN]; |
157 | |
158 | if (*m == 0) |
159 | return 0; |
160 | |
161 | strncpy(model, m, ATA_ID_PROD_LEN); |
162 | ide_fixstring(model, ATA_ID_PROD_LEN, 1); /* byte-swap */ |
163 | |
164 | for (p = qd65xx_timing ; p->offset != -1 ; p++) { |
165 | if (!strncmp(p->model, model+p->offset, 4)) { |
166 | printk(KERN_DEBUG "%s: listed !\n", drive->name); |
167 | *active_time = p->active; |
168 | *recovery_time = p->recovery; |
169 | return 1; |
170 | } |
171 | } |
172 | return 0; |
173 | } |
174 | |
175 | /* |
176 | * qd_set_timing: |
177 | * |
178 | * records the timing |
179 | */ |
180 | |
181 | static void qd_set_timing (ide_drive_t *drive, u8 timing) |
182 | { |
183 | unsigned long data = (unsigned long)ide_get_drivedata(drive); |
184 | |
185 | data &= 0xff00; |
186 | data |= timing; |
187 | ide_set_drivedata(drive, (void *)data); |
188 | |
189 | printk(KERN_DEBUG "%s: %#x\n", drive->name, timing); |
190 | } |
191 | |
192 | static void qd6500_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
193 | { |
194 | u16 *id = drive->id; |
195 | int active_time = 175; |
196 | int recovery_time = 415; /* worst case values from the dos driver */ |
197 | |
198 | /* FIXME: use drive->pio_mode value */ |
199 | if (!qd_find_disk_type(drive, &active_time, &recovery_time) && |
200 | (id[ATA_ID_OLD_PIO_MODES] & 0xff) && (id[ATA_ID_FIELD_VALID] & 2) && |
201 | id[ATA_ID_EIDE_PIO] >= 240) { |
202 | printk(KERN_INFO "%s: PIO mode%d\n", drive->name, |
203 | id[ATA_ID_OLD_PIO_MODES] & 0xff); |
204 | active_time = 110; |
205 | recovery_time = drive->id[ATA_ID_EIDE_PIO] - 120; |
206 | } |
207 | |
208 | qd_set_timing(drive, qd6500_compute_timing(drive->hwif, |
209 | active_time, recovery_time)); |
210 | } |
211 | |
212 | static void qd6580_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
213 | { |
214 | const u8 pio = drive->pio_mode - XFER_PIO_0; |
215 | struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); |
216 | unsigned int cycle_time; |
217 | int active_time = 175; |
218 | int recovery_time = 415; /* worst case values from the dos driver */ |
219 | u8 base = (hwif->config_data & 0xff00) >> 8; |
220 | |
221 | if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) { |
222 | cycle_time = ide_pio_cycle_time(drive, pio); |
223 | |
224 | switch (pio) { |
225 | case 0: break; |
226 | case 3: |
227 | if (cycle_time >= 110) { |
228 | active_time = 86; |
229 | recovery_time = cycle_time - 102; |
230 | } else |
231 | printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name); |
232 | break; |
233 | case 4: |
234 | if (cycle_time >= 69) { |
235 | active_time = 70; |
236 | recovery_time = cycle_time - 61; |
237 | } else |
238 | printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name); |
239 | break; |
240 | default: |
241 | if (cycle_time >= 180) { |
242 | active_time = 110; |
243 | recovery_time = cycle_time - 120; |
244 | } else { |
245 | active_time = t->active; |
246 | recovery_time = cycle_time - active_time; |
247 | } |
248 | } |
249 | printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio); |
250 | } |
251 | |
252 | if (!hwif->channel && drive->media != ide_disk) { |
253 | outb(0x5f, QD_CONTROL_PORT); |
254 | printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO " |
255 | "and post-write buffer on %s.\n", |
256 | drive->name, hwif->name); |
257 | } |
258 | |
259 | qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time)); |
260 | } |
261 | |
262 | /* |
263 | * qd_testreg |
264 | * |
265 | * tests if the given port is a register |
266 | */ |
267 | |
268 | static int __init qd_testreg(int port) |
269 | { |
270 | unsigned long flags; |
271 | u8 savereg, readreg; |
272 | |
273 | local_irq_save(flags); |
274 | savereg = inb_p(port); |
275 | outb_p(QD_TESTVAL, port); /* safe value */ |
276 | readreg = inb_p(port); |
277 | outb(savereg, port); |
278 | local_irq_restore(flags); |
279 | |
280 | if (savereg == QD_TESTVAL) { |
281 | printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n"); |
282 | printk(KERN_ERR "Please contact maintainers to tell about your hardware\n"); |
283 | printk(KERN_ERR "Assuming qd65xx is not present.\n"); |
284 | return 1; |
285 | } |
286 | |
287 | return (readreg != QD_TESTVAL); |
288 | } |
289 | |
290 | static void __init qd6500_init_dev(ide_drive_t *drive) |
291 | { |
292 | ide_hwif_t *hwif = drive->hwif; |
293 | u8 base = (hwif->config_data & 0xff00) >> 8; |
294 | u8 config = QD_CONFIG(hwif); |
295 | |
296 | ide_set_drivedata(drive, (void *)QD6500_DEF_DATA); |
297 | } |
298 | |
299 | static void __init qd6580_init_dev(ide_drive_t *drive) |
300 | { |
301 | ide_hwif_t *hwif = drive->hwif; |
302 | u16 t1, t2; |
303 | u8 base = (hwif->config_data & 0xff00) >> 8; |
304 | u8 config = QD_CONFIG(hwif); |
305 | |
306 | if (hwif->host_flags & IDE_HFLAG_SINGLE) { |
307 | t1 = QD6580_DEF_DATA; |
308 | t2 = QD6580_DEF_DATA2; |
309 | } else |
310 | t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA; |
311 | |
312 | ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1)); |
313 | } |
314 | |
315 | static const struct ide_tp_ops qd65xx_tp_ops = { |
316 | .exec_command = ide_exec_command, |
317 | .read_status = ide_read_status, |
318 | .read_altstatus = ide_read_altstatus, |
319 | .write_devctl = ide_write_devctl, |
320 | |
321 | .dev_select = qd65xx_dev_select, |
322 | .tf_load = ide_tf_load, |
323 | .tf_read = ide_tf_read, |
324 | |
325 | .input_data = ide_input_data, |
326 | .output_data = ide_output_data, |
327 | }; |
328 | |
329 | static const struct ide_port_ops qd6500_port_ops = { |
330 | .init_dev = qd6500_init_dev, |
331 | .set_pio_mode = qd6500_set_pio_mode, |
332 | }; |
333 | |
334 | static const struct ide_port_ops qd6580_port_ops = { |
335 | .init_dev = qd6580_init_dev, |
336 | .set_pio_mode = qd6580_set_pio_mode, |
337 | }; |
338 | |
339 | static const struct ide_port_info qd65xx_port_info __initdata = { |
340 | .name = DRV_NAME, |
341 | .tp_ops = &qd65xx_tp_ops, |
342 | .chipset = ide_qd65xx, |
343 | .host_flags = IDE_HFLAG_IO_32BIT | |
344 | IDE_HFLAG_NO_DMA, |
345 | .pio_mask = ATA_PIO4, |
346 | }; |
347 | |
348 | /* |
349 | * qd_probe: |
350 | * |
351 | * looks at the specified baseport, and if qd found, registers & initialises it |
352 | * return 1 if another qd may be probed |
353 | */ |
354 | |
355 | static int __init qd_probe(int base) |
356 | { |
357 | int rc; |
358 | u8 config, unit, control; |
359 | struct ide_port_info d = qd65xx_port_info; |
360 | |
361 | config = inb(QD_CONFIG_PORT); |
362 | |
363 | if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) ) |
364 | return -ENODEV; |
365 | |
366 | unit = ! (config & QD_CONFIG_IDE_BASEPORT); |
367 | |
368 | if (unit) |
369 | d.host_flags |= IDE_HFLAG_QD_2ND_PORT; |
370 | |
371 | switch (config & 0xf0) { |
372 | case QD_CONFIG_QD6500: |
373 | if (qd_testreg(base)) |
374 | return -ENODEV; /* bad register */ |
375 | |
376 | if (config & QD_CONFIG_DISABLED) { |
377 | printk(KERN_WARNING "qd6500 is disabled !\n"); |
378 | return -ENODEV; |
379 | } |
380 | |
381 | printk(KERN_NOTICE "qd6500 at %#x\n", base); |
382 | printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n", |
383 | config, QD_ID3); |
384 | |
385 | d.port_ops = &qd6500_port_ops; |
386 | d.host_flags |= IDE_HFLAG_SINGLE; |
387 | break; |
388 | case QD_CONFIG_QD6580_A: |
389 | case QD_CONFIG_QD6580_B: |
390 | if (qd_testreg(base) || qd_testreg(base + 0x02)) |
391 | return -ENODEV; /* bad registers */ |
392 | |
393 | control = inb(QD_CONTROL_PORT); |
394 | |
395 | printk(KERN_NOTICE "qd6580 at %#x\n", base); |
396 | printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n", |
397 | config, control, QD_ID3); |
398 | |
399 | outb(QD_DEF_CONTR, QD_CONTROL_PORT); |
400 | |
401 | d.port_ops = &qd6580_port_ops; |
402 | if (control & QD_CONTR_SEC_DISABLED) |
403 | d.host_flags |= IDE_HFLAG_SINGLE; |
404 | |
405 | printk(KERN_INFO "qd6580: %s IDE board\n", |
406 | (control & QD_CONTR_SEC_DISABLED) ? "single" : "dual"); |
407 | break; |
408 | default: |
409 | return -ENODEV; |
410 | } |
411 | |
412 | rc = ide_legacy_device_add(&d, (base << 8) | config); |
413 | |
414 | if (d.host_flags & IDE_HFLAG_SINGLE) |
415 | return (rc == 0) ? 1 : rc; |
416 | |
417 | return rc; |
418 | } |
419 | |
420 | static int probe_qd65xx; |
421 | |
422 | module_param_named(probe, probe_qd65xx, bool, 0); |
423 | MODULE_PARM_DESC(probe, "probe for QD65xx chipsets"); |
424 | |
425 | static int __init qd65xx_init(void) |
426 | { |
427 | int rc1, rc2 = -ENODEV; |
428 | |
429 | if (probe_qd65xx == 0) |
430 | return -ENODEV; |
431 | |
432 | rc1 = qd_probe(0x30); |
433 | if (rc1) |
434 | rc2 = qd_probe(0xb0); |
435 | |
436 | if (rc1 < 0 && rc2 < 0) |
437 | return -ENODEV; |
438 | |
439 | return 0; |
440 | } |
441 | |
442 | module_init(qd65xx_init); |
443 | |
444 | MODULE_AUTHOR("Samuel Thibault"); |
445 | MODULE_DESCRIPTION("support of qd65xx vlb ide chipset"); |
446 | MODULE_LICENSE("GPL"); |
447 |
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