Root/
1 | /* |
2 | * Driver for DBRI sound chip found on Sparcs. |
3 | * Copyright (C) 2004, 2005 Martin Habets (mhabets@users.sourceforge.net) |
4 | * |
5 | * Converted to ring buffered version by Krzysztof Helt (krzysztof.h1@wp.pl) |
6 | * |
7 | * Based entirely upon drivers/sbus/audio/dbri.c which is: |
8 | * Copyright (C) 1997 Rudolf Koenig (rfkoenig@immd4.informatik.uni-erlangen.de) |
9 | * Copyright (C) 1998, 1999 Brent Baccala (baccala@freesoft.org) |
10 | * |
11 | * This is the low level driver for the DBRI & MMCODEC duo used for ISDN & AUDIO |
12 | * on Sun SPARCStation 10, 20, LX and Voyager models. |
13 | * |
14 | * - DBRI: AT&T T5900FX Dual Basic Rates ISDN Interface. It is a 32 channel |
15 | * data time multiplexer with ISDN support (aka T7259) |
16 | * Interfaces: SBus,ISDN NT & TE, CHI, 4 bits parallel. |
17 | * CHI: (spelled ki) Concentration Highway Interface (AT&T or Intel bus ?). |
18 | * Documentation: |
19 | * - "STP 4000SBus Dual Basic Rate ISDN (DBRI) Transceiver" from |
20 | * Sparc Technology Business (courtesy of Sun Support) |
21 | * - Data sheet of the T7903, a newer but very similar ISA bus equivalent |
22 | * available from the Lucent (formerly AT&T microelectronics) home |
23 | * page. |
24 | * - http://www.freesoft.org/Linux/DBRI/ |
25 | * - MMCODEC: Crystal Semiconductor CS4215 16 bit Multimedia Audio Codec |
26 | * Interfaces: CHI, Audio In & Out, 2 bits parallel |
27 | * Documentation: from the Crystal Semiconductor home page. |
28 | * |
29 | * The DBRI is a 32 pipe machine, each pipe can transfer some bits between |
30 | * memory and a serial device (long pipes, no. 0-15) or between two serial |
31 | * devices (short pipes, no. 16-31), or simply send a fixed data to a serial |
32 | * device (short pipes). |
33 | * A timeslot defines the bit-offset and no. of bits read from a serial device. |
34 | * The timeslots are linked to 6 circular lists, one for each direction for |
35 | * each serial device (NT,TE,CHI). A timeslot is associated to 1 or 2 pipes |
36 | * (the second one is a monitor/tee pipe, valid only for serial input). |
37 | * |
38 | * The mmcodec is connected via the CHI bus and needs the data & some |
39 | * parameters (volume, output selection) time multiplexed in 8 byte |
40 | * chunks. It also has a control mode, which serves for audio format setting. |
41 | * |
42 | * Looking at the CS4215 data sheet it is easy to set up 2 or 4 codecs on |
43 | * the same CHI bus, so I thought perhaps it is possible to use the on-board |
44 | * & the speakerbox codec simultaneously, giving 2 (not very independent :-) |
45 | * audio devices. But the SUN HW group decided against it, at least on my |
46 | * LX the speakerbox connector has at least 1 pin missing and 1 wrongly |
47 | * connected. |
48 | * |
49 | * I've tried to stick to the following function naming conventions: |
50 | * snd_* ALSA stuff |
51 | * cs4215_* CS4215 codec specific stuff |
52 | * dbri_* DBRI high-level stuff |
53 | * other DBRI low-level stuff |
54 | */ |
55 | |
56 | #include <linux/interrupt.h> |
57 | #include <linux/delay.h> |
58 | #include <linux/irq.h> |
59 | #include <linux/io.h> |
60 | #include <linux/dma-mapping.h> |
61 | #include <linux/gfp.h> |
62 | |
63 | #include <sound/core.h> |
64 | #include <sound/pcm.h> |
65 | #include <sound/pcm_params.h> |
66 | #include <sound/info.h> |
67 | #include <sound/control.h> |
68 | #include <sound/initval.h> |
69 | |
70 | #include <linux/of.h> |
71 | #include <linux/of_device.h> |
72 | #include <linux/atomic.h> |
73 | #include <linux/module.h> |
74 | |
75 | MODULE_AUTHOR("Rudolf Koenig, Brent Baccala and Martin Habets"); |
76 | MODULE_DESCRIPTION("Sun DBRI"); |
77 | MODULE_LICENSE("GPL"); |
78 | MODULE_SUPPORTED_DEVICE("{{Sun,DBRI}}"); |
79 | |
80 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
81 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
82 | /* Enable this card */ |
83 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; |
84 | |
85 | module_param_array(index, int, NULL, 0444); |
86 | MODULE_PARM_DESC(index, "Index value for Sun DBRI soundcard."); |
87 | module_param_array(id, charp, NULL, 0444); |
88 | MODULE_PARM_DESC(id, "ID string for Sun DBRI soundcard."); |
89 | module_param_array(enable, bool, NULL, 0444); |
90 | MODULE_PARM_DESC(enable, "Enable Sun DBRI soundcard."); |
91 | |
92 | #undef DBRI_DEBUG |
93 | |
94 | #define D_INT (1<<0) |
95 | #define D_GEN (1<<1) |
96 | #define D_CMD (1<<2) |
97 | #define D_MM (1<<3) |
98 | #define D_USR (1<<4) |
99 | #define D_DESC (1<<5) |
100 | |
101 | static int dbri_debug; |
102 | module_param(dbri_debug, int, 0644); |
103 | MODULE_PARM_DESC(dbri_debug, "Debug value for Sun DBRI soundcard."); |
104 | |
105 | #ifdef DBRI_DEBUG |
106 | static char *cmds[] = { |
107 | "WAIT", "PAUSE", "JUMP", "IIQ", "REX", "SDP", "CDP", "DTS", |
108 | "SSP", "CHI", "NT", "TE", "CDEC", "TEST", "CDM", "RESRV" |
109 | }; |
110 | |
111 | #define dprintk(a, x...) if (dbri_debug & a) printk(KERN_DEBUG x) |
112 | |
113 | #else |
114 | #define dprintk(a, x...) do { } while (0) |
115 | |
116 | #endif /* DBRI_DEBUG */ |
117 | |
118 | #define DBRI_CMD(cmd, intr, value) ((cmd << 28) | \ |
119 | (intr << 27) | \ |
120 | value) |
121 | |
122 | /*************************************************************************** |
123 | CS4215 specific definitions and structures |
124 | ****************************************************************************/ |
125 | |
126 | struct cs4215 { |
127 | __u8 data[4]; /* Data mode: Time slots 5-8 */ |
128 | __u8 ctrl[4]; /* Ctrl mode: Time slots 1-4 */ |
129 | __u8 onboard; |
130 | __u8 offset; /* Bit offset from frame sync to time slot 1 */ |
131 | volatile __u32 status; |
132 | volatile __u32 version; |
133 | __u8 precision; /* In bits, either 8 or 16 */ |
134 | __u8 channels; /* 1 or 2 */ |
135 | }; |
136 | |
137 | /* |
138 | * Control mode first |
139 | */ |
140 | |
141 | /* Time Slot 1, Status register */ |
142 | #define CS4215_CLB (1<<2) /* Control Latch Bit */ |
143 | #define CS4215_OLB (1<<3) /* 1: line: 2.0V, speaker 4V */ |
144 | /* 0: line: 2.8V, speaker 8V */ |
145 | #define CS4215_MLB (1<<4) /* 1: Microphone: 20dB gain disabled */ |
146 | #define CS4215_RSRVD_1 (1<<5) |
147 | |
148 | /* Time Slot 2, Data Format Register */ |
149 | #define CS4215_DFR_LINEAR16 0 |
150 | #define CS4215_DFR_ULAW 1 |
151 | #define CS4215_DFR_ALAW 2 |
152 | #define CS4215_DFR_LINEAR8 3 |
153 | #define CS4215_DFR_STEREO (1<<2) |
154 | static struct { |
155 | unsigned short freq; |
156 | unsigned char xtal; |
157 | unsigned char csval; |
158 | } CS4215_FREQ[] = { |
159 | { 8000, (1 << 4), (0 << 3) }, |
160 | { 16000, (1 << 4), (1 << 3) }, |
161 | { 27429, (1 << 4), (2 << 3) }, /* Actually 24428.57 */ |
162 | { 32000, (1 << 4), (3 << 3) }, |
163 | /* { NA, (1 << 4), (4 << 3) }, */ |
164 | /* { NA, (1 << 4), (5 << 3) }, */ |
165 | { 48000, (1 << 4), (6 << 3) }, |
166 | { 9600, (1 << 4), (7 << 3) }, |
167 | { 5512, (2 << 4), (0 << 3) }, /* Actually 5512.5 */ |
168 | { 11025, (2 << 4), (1 << 3) }, |
169 | { 18900, (2 << 4), (2 << 3) }, |
170 | { 22050, (2 << 4), (3 << 3) }, |
171 | { 37800, (2 << 4), (4 << 3) }, |
172 | { 44100, (2 << 4), (5 << 3) }, |
173 | { 33075, (2 << 4), (6 << 3) }, |
174 | { 6615, (2 << 4), (7 << 3) }, |
175 | { 0, 0, 0} |
176 | }; |
177 | |
178 | #define CS4215_HPF (1<<7) /* High Pass Filter, 1: Enabled */ |
179 | |
180 | #define CS4215_12_MASK 0xfcbf /* Mask off reserved bits in slot 1 & 2 */ |
181 | |
182 | /* Time Slot 3, Serial Port Control register */ |
183 | #define CS4215_XEN (1<<0) /* 0: Enable serial output */ |
184 | #define CS4215_XCLK (1<<1) /* 1: Master mode: Generate SCLK */ |
185 | #define CS4215_BSEL_64 (0<<2) /* Bitrate: 64 bits per frame */ |
186 | #define CS4215_BSEL_128 (1<<2) |
187 | #define CS4215_BSEL_256 (2<<2) |
188 | #define CS4215_MCK_MAST (0<<4) /* Master clock */ |
189 | #define CS4215_MCK_XTL1 (1<<4) /* 24.576 MHz clock source */ |
190 | #define CS4215_MCK_XTL2 (2<<4) /* 16.9344 MHz clock source */ |
191 | #define CS4215_MCK_CLK1 (3<<4) /* Clockin, 256 x Fs */ |
192 | #define CS4215_MCK_CLK2 (4<<4) /* Clockin, see DFR */ |
193 | |
194 | /* Time Slot 4, Test Register */ |
195 | #define CS4215_DAD (1<<0) /* 0:Digital-Dig loop, 1:Dig-Analog-Dig loop */ |
196 | #define CS4215_ENL (1<<1) /* Enable Loopback Testing */ |
197 | |
198 | /* Time Slot 5, Parallel Port Register */ |
199 | /* Read only here and the same as the in data mode */ |
200 | |
201 | /* Time Slot 6, Reserved */ |
202 | |
203 | /* Time Slot 7, Version Register */ |
204 | #define CS4215_VERSION_MASK 0xf /* Known versions 0/C, 1/D, 2/E */ |
205 | |
206 | /* Time Slot 8, Reserved */ |
207 | |
208 | /* |
209 | * Data mode |
210 | */ |
211 | /* Time Slot 1-2: Left Channel Data, 2-3: Right Channel Data */ |
212 | |
213 | /* Time Slot 5, Output Setting */ |
214 | #define CS4215_LO(v) v /* Left Output Attenuation 0x3f: -94.5 dB */ |
215 | #define CS4215_LE (1<<6) /* Line Out Enable */ |
216 | #define CS4215_HE (1<<7) /* Headphone Enable */ |
217 | |
218 | /* Time Slot 6, Output Setting */ |
219 | #define CS4215_RO(v) v /* Right Output Attenuation 0x3f: -94.5 dB */ |
220 | #define CS4215_SE (1<<6) /* Speaker Enable */ |
221 | #define CS4215_ADI (1<<7) /* A/D Data Invalid: Busy in calibration */ |
222 | |
223 | /* Time Slot 7, Input Setting */ |
224 | #define CS4215_LG(v) v /* Left Gain Setting 0xf: 22.5 dB */ |
225 | #define CS4215_IS (1<<4) /* Input Select: 1=Microphone, 0=Line */ |
226 | #define CS4215_OVR (1<<5) /* 1: Over range condition occurred */ |
227 | #define CS4215_PIO0 (1<<6) /* Parallel I/O 0 */ |
228 | #define CS4215_PIO1 (1<<7) |
229 | |
230 | /* Time Slot 8, Input Setting */ |
231 | #define CS4215_RG(v) v /* Right Gain Setting 0xf: 22.5 dB */ |
232 | #define CS4215_MA(v) (v<<4) /* Monitor Path Attenuation 0xf: mute */ |
233 | |
234 | /*************************************************************************** |
235 | DBRI specific definitions and structures |
236 | ****************************************************************************/ |
237 | |
238 | /* DBRI main registers */ |
239 | #define REG0 0x00 /* Status and Control */ |
240 | #define REG1 0x04 /* Mode and Interrupt */ |
241 | #define REG2 0x08 /* Parallel IO */ |
242 | #define REG3 0x0c /* Test */ |
243 | #define REG8 0x20 /* Command Queue Pointer */ |
244 | #define REG9 0x24 /* Interrupt Queue Pointer */ |
245 | |
246 | #define DBRI_NO_CMDS 64 |
247 | #define DBRI_INT_BLK 64 |
248 | #define DBRI_NO_DESCS 64 |
249 | #define DBRI_NO_PIPES 32 |
250 | #define DBRI_MAX_PIPE (DBRI_NO_PIPES - 1) |
251 | |
252 | #define DBRI_REC 0 |
253 | #define DBRI_PLAY 1 |
254 | #define DBRI_NO_STREAMS 2 |
255 | |
256 | /* One transmit/receive descriptor */ |
257 | /* When ba != 0 descriptor is used */ |
258 | struct dbri_mem { |
259 | volatile __u32 word1; |
260 | __u32 ba; /* Transmit/Receive Buffer Address */ |
261 | __u32 nda; /* Next Descriptor Address */ |
262 | volatile __u32 word4; |
263 | }; |
264 | |
265 | /* This structure is in a DMA region where it can accessed by both |
266 | * the CPU and the DBRI |
267 | */ |
268 | struct dbri_dma { |
269 | s32 cmd[DBRI_NO_CMDS]; /* Place for commands */ |
270 | volatile s32 intr[DBRI_INT_BLK]; /* Interrupt field */ |
271 | struct dbri_mem desc[DBRI_NO_DESCS]; /* Xmit/receive descriptors */ |
272 | }; |
273 | |
274 | #define dbri_dma_off(member, elem) \ |
275 | ((u32)(unsigned long) \ |
276 | (&(((struct dbri_dma *)0)->member[elem]))) |
277 | |
278 | enum in_or_out { PIPEinput, PIPEoutput }; |
279 | |
280 | struct dbri_pipe { |
281 | u32 sdp; /* SDP command word */ |
282 | int nextpipe; /* Next pipe in linked list */ |
283 | int length; /* Length of timeslot (bits) */ |
284 | int first_desc; /* Index of first descriptor */ |
285 | int desc; /* Index of active descriptor */ |
286 | volatile __u32 *recv_fixed_ptr; /* Ptr to receive fixed data */ |
287 | }; |
288 | |
289 | /* Per stream (playback or record) information */ |
290 | struct dbri_streaminfo { |
291 | struct snd_pcm_substream *substream; |
292 | u32 dvma_buffer; /* Device view of ALSA DMA buffer */ |
293 | int size; /* Size of DMA buffer */ |
294 | size_t offset; /* offset in user buffer */ |
295 | int pipe; /* Data pipe used */ |
296 | int left_gain; /* mixer elements */ |
297 | int right_gain; |
298 | }; |
299 | |
300 | /* This structure holds the information for both chips (DBRI & CS4215) */ |
301 | struct snd_dbri { |
302 | int regs_size, irq; /* Needed for unload */ |
303 | struct platform_device *op; /* OF device info */ |
304 | spinlock_t lock; |
305 | |
306 | struct dbri_dma *dma; /* Pointer to our DMA block */ |
307 | u32 dma_dvma; /* DBRI visible DMA address */ |
308 | |
309 | void __iomem *regs; /* dbri HW regs */ |
310 | int dbri_irqp; /* intr queue pointer */ |
311 | |
312 | struct dbri_pipe pipes[DBRI_NO_PIPES]; /* DBRI's 32 data pipes */ |
313 | int next_desc[DBRI_NO_DESCS]; /* Index of next desc, or -1 */ |
314 | spinlock_t cmdlock; /* Protects cmd queue accesses */ |
315 | s32 *cmdptr; /* Pointer to the last queued cmd */ |
316 | |
317 | int chi_bpf; |
318 | |
319 | struct cs4215 mm; /* mmcodec special info */ |
320 | /* per stream (playback/record) info */ |
321 | struct dbri_streaminfo stream_info[DBRI_NO_STREAMS]; |
322 | }; |
323 | |
324 | #define DBRI_MAX_VOLUME 63 /* Output volume */ |
325 | #define DBRI_MAX_GAIN 15 /* Input gain */ |
326 | |
327 | /* DBRI Reg0 - Status Control Register - defines. (Page 17) */ |
328 | #define D_P (1<<15) /* Program command & queue pointer valid */ |
329 | #define D_G (1<<14) /* Allow 4-Word SBus Burst */ |
330 | #define D_S (1<<13) /* Allow 16-Word SBus Burst */ |
331 | #define D_E (1<<12) /* Allow 8-Word SBus Burst */ |
332 | #define D_X (1<<7) /* Sanity Timer Disable */ |
333 | #define D_T (1<<6) /* Permit activation of the TE interface */ |
334 | #define D_N (1<<5) /* Permit activation of the NT interface */ |
335 | #define D_C (1<<4) /* Permit activation of the CHI interface */ |
336 | #define D_F (1<<3) /* Force Sanity Timer Time-Out */ |
337 | #define D_D (1<<2) /* Disable Master Mode */ |
338 | #define D_H (1<<1) /* Halt for Analysis */ |
339 | #define D_R (1<<0) /* Soft Reset */ |
340 | |
341 | /* DBRI Reg1 - Mode and Interrupt Register - defines. (Page 18) */ |
342 | #define D_LITTLE_END (1<<8) /* Byte Order */ |
343 | #define D_BIG_END (0<<8) /* Byte Order */ |
344 | #define D_MRR (1<<4) /* Multiple Error Ack on SBus (read only) */ |
345 | #define D_MLE (1<<3) /* Multiple Late Error on SBus (read only) */ |
346 | #define D_LBG (1<<2) /* Lost Bus Grant on SBus (read only) */ |
347 | #define D_MBE (1<<1) /* Burst Error on SBus (read only) */ |
348 | #define D_IR (1<<0) /* Interrupt Indicator (read only) */ |
349 | |
350 | /* DBRI Reg2 - Parallel IO Register - defines. (Page 18) */ |
351 | #define D_ENPIO3 (1<<7) /* Enable Pin 3 */ |
352 | #define D_ENPIO2 (1<<6) /* Enable Pin 2 */ |
353 | #define D_ENPIO1 (1<<5) /* Enable Pin 1 */ |
354 | #define D_ENPIO0 (1<<4) /* Enable Pin 0 */ |
355 | #define D_ENPIO (0xf0) /* Enable all the pins */ |
356 | #define D_PIO3 (1<<3) /* Pin 3: 1: Data mode, 0: Ctrl mode */ |
357 | #define D_PIO2 (1<<2) /* Pin 2: 1: Onboard PDN */ |
358 | #define D_PIO1 (1<<1) /* Pin 1: 0: Reset */ |
359 | #define D_PIO0 (1<<0) /* Pin 0: 1: Speakerbox PDN */ |
360 | |
361 | /* DBRI Commands (Page 20) */ |
362 | #define D_WAIT 0x0 /* Stop execution */ |
363 | #define D_PAUSE 0x1 /* Flush long pipes */ |
364 | #define D_JUMP 0x2 /* New command queue */ |
365 | #define D_IIQ 0x3 /* Initialize Interrupt Queue */ |
366 | #define D_REX 0x4 /* Report command execution via interrupt */ |
367 | #define D_SDP 0x5 /* Setup Data Pipe */ |
368 | #define D_CDP 0x6 /* Continue Data Pipe (reread NULL Pointer) */ |
369 | #define D_DTS 0x7 /* Define Time Slot */ |
370 | #define D_SSP 0x8 /* Set short Data Pipe */ |
371 | #define D_CHI 0x9 /* Set CHI Global Mode */ |
372 | #define D_NT 0xa /* NT Command */ |
373 | #define D_TE 0xb /* TE Command */ |
374 | #define D_CDEC 0xc /* Codec setup */ |
375 | #define D_TEST 0xd /* No comment */ |
376 | #define D_CDM 0xe /* CHI Data mode command */ |
377 | |
378 | /* Special bits for some commands */ |
379 | #define D_PIPE(v) ((v)<<0) /* Pipe No.: 0-15 long, 16-21 short */ |
380 | |
381 | /* Setup Data Pipe */ |
382 | /* IRM */ |
383 | #define D_SDP_2SAME (1<<18) /* Report 2nd time in a row value received */ |
384 | #define D_SDP_CHANGE (2<<18) /* Report any changes */ |
385 | #define D_SDP_EVERY (3<<18) /* Report any changes */ |
386 | #define D_SDP_EOL (1<<17) /* EOL interrupt enable */ |
387 | #define D_SDP_IDLE (1<<16) /* HDLC idle interrupt enable */ |
388 | |
389 | /* Pipe data MODE */ |
390 | #define D_SDP_MEM (0<<13) /* To/from memory */ |
391 | #define D_SDP_HDLC (2<<13) |
392 | #define D_SDP_HDLC_D (3<<13) /* D Channel (prio control) */ |
393 | #define D_SDP_SER (4<<13) /* Serial to serial */ |
394 | #define D_SDP_FIXED (6<<13) /* Short only */ |
395 | #define D_SDP_MODE(v) ((v)&(7<<13)) |
396 | |
397 | #define D_SDP_TO_SER (1<<12) /* Direction */ |
398 | #define D_SDP_FROM_SER (0<<12) /* Direction */ |
399 | #define D_SDP_MSB (1<<11) /* Bit order within Byte */ |
400 | #define D_SDP_LSB (0<<11) /* Bit order within Byte */ |
401 | #define D_SDP_P (1<<10) /* Pointer Valid */ |
402 | #define D_SDP_A (1<<8) /* Abort */ |
403 | #define D_SDP_C (1<<7) /* Clear */ |
404 | |
405 | /* Define Time Slot */ |
406 | #define D_DTS_VI (1<<17) /* Valid Input Time-Slot Descriptor */ |
407 | #define D_DTS_VO (1<<16) /* Valid Output Time-Slot Descriptor */ |
408 | #define D_DTS_INS (1<<15) /* Insert Time Slot */ |
409 | #define D_DTS_DEL (0<<15) /* Delete Time Slot */ |
410 | #define D_DTS_PRVIN(v) ((v)<<10) /* Previous In Pipe */ |
411 | #define D_DTS_PRVOUT(v) ((v)<<5) /* Previous Out Pipe */ |
412 | |
413 | /* Time Slot defines */ |
414 | #define D_TS_LEN(v) ((v)<<24) /* Number of bits in this time slot */ |
415 | #define D_TS_CYCLE(v) ((v)<<14) /* Bit Count at start of TS */ |
416 | #define D_TS_DI (1<<13) /* Data Invert */ |
417 | #define D_TS_1CHANNEL (0<<10) /* Single Channel / Normal mode */ |
418 | #define D_TS_MONITOR (2<<10) /* Monitor pipe */ |
419 | #define D_TS_NONCONTIG (3<<10) /* Non contiguous mode */ |
420 | #define D_TS_ANCHOR (7<<10) /* Starting short pipes */ |
421 | #define D_TS_MON(v) ((v)<<5) /* Monitor Pipe */ |
422 | #define D_TS_NEXT(v) ((v)<<0) /* Pipe no.: 0-15 long, 16-21 short */ |
423 | |
424 | /* Concentration Highway Interface Modes */ |
425 | #define D_CHI_CHICM(v) ((v)<<16) /* Clock mode */ |
426 | #define D_CHI_IR (1<<15) /* Immediate Interrupt Report */ |
427 | #define D_CHI_EN (1<<14) /* CHIL Interrupt enabled */ |
428 | #define D_CHI_OD (1<<13) /* Open Drain Enable */ |
429 | #define D_CHI_FE (1<<12) /* Sample CHIFS on Rising Frame Edge */ |
430 | #define D_CHI_FD (1<<11) /* Frame Drive */ |
431 | #define D_CHI_BPF(v) ((v)<<0) /* Bits per Frame */ |
432 | |
433 | /* NT: These are here for completeness */ |
434 | #define D_NT_FBIT (1<<17) /* Frame Bit */ |
435 | #define D_NT_NBF (1<<16) /* Number of bad frames to loose framing */ |
436 | #define D_NT_IRM_IMM (1<<15) /* Interrupt Report & Mask: Immediate */ |
437 | #define D_NT_IRM_EN (1<<14) /* Interrupt Report & Mask: Enable */ |
438 | #define D_NT_ISNT (1<<13) /* Configure interface as NT */ |
439 | #define D_NT_FT (1<<12) /* Fixed Timing */ |
440 | #define D_NT_EZ (1<<11) /* Echo Channel is Zeros */ |
441 | #define D_NT_IFA (1<<10) /* Inhibit Final Activation */ |
442 | #define D_NT_ACT (1<<9) /* Activate Interface */ |
443 | #define D_NT_MFE (1<<8) /* Multiframe Enable */ |
444 | #define D_NT_RLB(v) ((v)<<5) /* Remote Loopback */ |
445 | #define D_NT_LLB(v) ((v)<<2) /* Local Loopback */ |
446 | #define D_NT_FACT (1<<1) /* Force Activation */ |
447 | #define D_NT_ABV (1<<0) /* Activate Bipolar Violation */ |
448 | |
449 | /* Codec Setup */ |
450 | #define D_CDEC_CK(v) ((v)<<24) /* Clock Select */ |
451 | #define D_CDEC_FED(v) ((v)<<12) /* FSCOD Falling Edge Delay */ |
452 | #define D_CDEC_RED(v) ((v)<<0) /* FSCOD Rising Edge Delay */ |
453 | |
454 | /* Test */ |
455 | #define D_TEST_RAM(v) ((v)<<16) /* RAM Pointer */ |
456 | #define D_TEST_SIZE(v) ((v)<<11) /* */ |
457 | #define D_TEST_ROMONOFF 0x5 /* Toggle ROM opcode monitor on/off */ |
458 | #define D_TEST_PROC 0x6 /* Microprocessor test */ |
459 | #define D_TEST_SER 0x7 /* Serial-Controller test */ |
460 | #define D_TEST_RAMREAD 0x8 /* Copy from Ram to system memory */ |
461 | #define D_TEST_RAMWRITE 0x9 /* Copy into Ram from system memory */ |
462 | #define D_TEST_RAMBIST 0xa /* RAM Built-In Self Test */ |
463 | #define D_TEST_MCBIST 0xb /* Microcontroller Built-In Self Test */ |
464 | #define D_TEST_DUMP 0xe /* ROM Dump */ |
465 | |
466 | /* CHI Data Mode */ |
467 | #define D_CDM_THI (1 << 8) /* Transmit Data on CHIDR Pin */ |
468 | #define D_CDM_RHI (1 << 7) /* Receive Data on CHIDX Pin */ |
469 | #define D_CDM_RCE (1 << 6) /* Receive on Rising Edge of CHICK */ |
470 | #define D_CDM_XCE (1 << 2) /* Transmit Data on Rising Edge of CHICK */ |
471 | #define D_CDM_XEN (1 << 1) /* Transmit Highway Enable */ |
472 | #define D_CDM_REN (1 << 0) /* Receive Highway Enable */ |
473 | |
474 | /* The Interrupts */ |
475 | #define D_INTR_BRDY 1 /* Buffer Ready for processing */ |
476 | #define D_INTR_MINT 2 /* Marked Interrupt in RD/TD */ |
477 | #define D_INTR_IBEG 3 /* Flag to idle transition detected (HDLC) */ |
478 | #define D_INTR_IEND 4 /* Idle to flag transition detected (HDLC) */ |
479 | #define D_INTR_EOL 5 /* End of List */ |
480 | #define D_INTR_CMDI 6 /* Command has bean read */ |
481 | #define D_INTR_XCMP 8 /* Transmission of frame complete */ |
482 | #define D_INTR_SBRI 9 /* BRI status change info */ |
483 | #define D_INTR_FXDT 10 /* Fixed data change */ |
484 | #define D_INTR_CHIL 11 /* CHI lost frame sync (channel 36 only) */ |
485 | #define D_INTR_COLL 11 /* Unrecoverable D-Channel collision */ |
486 | #define D_INTR_DBYT 12 /* Dropped by frame slip */ |
487 | #define D_INTR_RBYT 13 /* Repeated by frame slip */ |
488 | #define D_INTR_LINT 14 /* Lost Interrupt */ |
489 | #define D_INTR_UNDR 15 /* DMA underrun */ |
490 | |
491 | #define D_INTR_TE 32 |
492 | #define D_INTR_NT 34 |
493 | #define D_INTR_CHI 36 |
494 | #define D_INTR_CMD 38 |
495 | |
496 | #define D_INTR_GETCHAN(v) (((v) >> 24) & 0x3f) |
497 | #define D_INTR_GETCODE(v) (((v) >> 20) & 0xf) |
498 | #define D_INTR_GETCMD(v) (((v) >> 16) & 0xf) |
499 | #define D_INTR_GETVAL(v) ((v) & 0xffff) |
500 | #define D_INTR_GETRVAL(v) ((v) & 0xfffff) |
501 | |
502 | #define D_P_0 0 /* TE receive anchor */ |
503 | #define D_P_1 1 /* TE transmit anchor */ |
504 | #define D_P_2 2 /* NT transmit anchor */ |
505 | #define D_P_3 3 /* NT receive anchor */ |
506 | #define D_P_4 4 /* CHI send data */ |
507 | #define D_P_5 5 /* CHI receive data */ |
508 | #define D_P_6 6 /* */ |
509 | #define D_P_7 7 /* */ |
510 | #define D_P_8 8 /* */ |
511 | #define D_P_9 9 /* */ |
512 | #define D_P_10 10 /* */ |
513 | #define D_P_11 11 /* */ |
514 | #define D_P_12 12 /* */ |
515 | #define D_P_13 13 /* */ |
516 | #define D_P_14 14 /* */ |
517 | #define D_P_15 15 /* */ |
518 | #define D_P_16 16 /* CHI anchor pipe */ |
519 | #define D_P_17 17 /* CHI send */ |
520 | #define D_P_18 18 /* CHI receive */ |
521 | #define D_P_19 19 /* CHI receive */ |
522 | #define D_P_20 20 /* CHI receive */ |
523 | #define D_P_21 21 /* */ |
524 | #define D_P_22 22 /* */ |
525 | #define D_P_23 23 /* */ |
526 | #define D_P_24 24 /* */ |
527 | #define D_P_25 25 /* */ |
528 | #define D_P_26 26 /* */ |
529 | #define D_P_27 27 /* */ |
530 | #define D_P_28 28 /* */ |
531 | #define D_P_29 29 /* */ |
532 | #define D_P_30 30 /* */ |
533 | #define D_P_31 31 /* */ |
534 | |
535 | /* Transmit descriptor defines */ |
536 | #define DBRI_TD_F (1 << 31) /* End of Frame */ |
537 | #define DBRI_TD_D (1 << 30) /* Do not append CRC */ |
538 | #define DBRI_TD_CNT(v) ((v) << 16) /* Number of valid bytes in the buffer */ |
539 | #define DBRI_TD_B (1 << 15) /* Final interrupt */ |
540 | #define DBRI_TD_M (1 << 14) /* Marker interrupt */ |
541 | #define DBRI_TD_I (1 << 13) /* Transmit Idle Characters */ |
542 | #define DBRI_TD_FCNT(v) (v) /* Flag Count */ |
543 | #define DBRI_TD_UNR (1 << 3) /* Underrun: transmitter is out of data */ |
544 | #define DBRI_TD_ABT (1 << 2) /* Abort: frame aborted */ |
545 | #define DBRI_TD_TBC (1 << 0) /* Transmit buffer Complete */ |
546 | #define DBRI_TD_STATUS(v) ((v) & 0xff) /* Transmit status */ |
547 | /* Maximum buffer size per TD: almost 8KB */ |
548 | #define DBRI_TD_MAXCNT ((1 << 13) - 4) |
549 | |
550 | /* Receive descriptor defines */ |
551 | #define DBRI_RD_F (1 << 31) /* End of Frame */ |
552 | #define DBRI_RD_C (1 << 30) /* Completed buffer */ |
553 | #define DBRI_RD_B (1 << 15) /* Final interrupt */ |
554 | #define DBRI_RD_M (1 << 14) /* Marker interrupt */ |
555 | #define DBRI_RD_BCNT(v) (v) /* Buffer size */ |
556 | #define DBRI_RD_CRC (1 << 7) /* 0: CRC is correct */ |
557 | #define DBRI_RD_BBC (1 << 6) /* 1: Bad Byte received */ |
558 | #define DBRI_RD_ABT (1 << 5) /* Abort: frame aborted */ |
559 | #define DBRI_RD_OVRN (1 << 3) /* Overrun: data lost */ |
560 | #define DBRI_RD_STATUS(v) ((v) & 0xff) /* Receive status */ |
561 | #define DBRI_RD_CNT(v) (((v) >> 16) & 0x1fff) /* Valid bytes in the buffer */ |
562 | |
563 | /* stream_info[] access */ |
564 | /* Translate the ALSA direction into the array index */ |
565 | #define DBRI_STREAMNO(substream) \ |
566 | (substream->stream == \ |
567 | SNDRV_PCM_STREAM_PLAYBACK ? DBRI_PLAY: DBRI_REC) |
568 | |
569 | /* Return a pointer to dbri_streaminfo */ |
570 | #define DBRI_STREAM(dbri, substream) \ |
571 | &dbri->stream_info[DBRI_STREAMNO(substream)] |
572 | |
573 | /* |
574 | * Short data pipes transmit LSB first. The CS4215 receives MSB first. Grrr. |
575 | * So we have to reverse the bits. Note: not all bit lengths are supported |
576 | */ |
577 | static __u32 reverse_bytes(__u32 b, int len) |
578 | { |
579 | switch (len) { |
580 | case 32: |
581 | b = ((b & 0xffff0000) >> 16) | ((b & 0x0000ffff) << 16); |
582 | case 16: |
583 | b = ((b & 0xff00ff00) >> 8) | ((b & 0x00ff00ff) << 8); |
584 | case 8: |
585 | b = ((b & 0xf0f0f0f0) >> 4) | ((b & 0x0f0f0f0f) << 4); |
586 | case 4: |
587 | b = ((b & 0xcccccccc) >> 2) | ((b & 0x33333333) << 2); |
588 | case 2: |
589 | b = ((b & 0xaaaaaaaa) >> 1) | ((b & 0x55555555) << 1); |
590 | case 1: |
591 | case 0: |
592 | break; |
593 | default: |
594 | printk(KERN_ERR "DBRI reverse_bytes: unsupported length\n"); |
595 | } |
596 | |
597 | return b; |
598 | } |
599 | |
600 | /* |
601 | **************************************************************************** |
602 | ************** DBRI initialization and command synchronization ************* |
603 | **************************************************************************** |
604 | |
605 | Commands are sent to the DBRI by building a list of them in memory, |
606 | then writing the address of the first list item to DBRI register 8. |
607 | The list is terminated with a WAIT command, which generates a |
608 | CPU interrupt to signal completion. |
609 | |
610 | Since the DBRI can run in parallel with the CPU, several means of |
611 | synchronization present themselves. The method implemented here uses |
612 | the dbri_cmdwait() to wait for execution of batch of sent commands. |
613 | |
614 | A circular command buffer is used here. A new command is being added |
615 | while another can be executed. The scheme works by adding two WAIT commands |
616 | after each sent batch of commands. When the next batch is prepared it is |
617 | added after the WAIT commands then the WAITs are replaced with single JUMP |
618 | command to the new batch. The the DBRI is forced to reread the last WAIT |
619 | command (replaced by the JUMP by then). If the DBRI is still executing |
620 | previous commands the request to reread the WAIT command is ignored. |
621 | |
622 | Every time a routine wants to write commands to the DBRI, it must |
623 | first call dbri_cmdlock() and get pointer to a free space in |
624 | dbri->dma->cmd buffer. After this, the commands can be written to |
625 | the buffer, and dbri_cmdsend() is called with the final pointer value |
626 | to send them to the DBRI. |
627 | |
628 | */ |
629 | |
630 | #define MAXLOOPS 20 |
631 | /* |
632 | * Wait for the current command string to execute |
633 | */ |
634 | static void dbri_cmdwait(struct snd_dbri *dbri) |
635 | { |
636 | int maxloops = MAXLOOPS; |
637 | unsigned long flags; |
638 | |
639 | /* Delay if previous commands are still being processed */ |
640 | spin_lock_irqsave(&dbri->lock, flags); |
641 | while ((--maxloops) > 0 && (sbus_readl(dbri->regs + REG0) & D_P)) { |
642 | spin_unlock_irqrestore(&dbri->lock, flags); |
643 | msleep_interruptible(1); |
644 | spin_lock_irqsave(&dbri->lock, flags); |
645 | } |
646 | spin_unlock_irqrestore(&dbri->lock, flags); |
647 | |
648 | if (maxloops == 0) |
649 | printk(KERN_ERR "DBRI: Chip never completed command buffer\n"); |
650 | else |
651 | dprintk(D_CMD, "Chip completed command buffer (%d)\n", |
652 | MAXLOOPS - maxloops - 1); |
653 | } |
654 | /* |
655 | * Lock the command queue and return pointer to space for len cmd words |
656 | * It locks the cmdlock spinlock. |
657 | */ |
658 | static s32 *dbri_cmdlock(struct snd_dbri *dbri, int len) |
659 | { |
660 | /* Space for 2 WAIT cmds (replaced later by 1 JUMP cmd) */ |
661 | len += 2; |
662 | spin_lock(&dbri->cmdlock); |
663 | if (dbri->cmdptr - dbri->dma->cmd + len < DBRI_NO_CMDS - 2) |
664 | return dbri->cmdptr + 2; |
665 | else if (len < sbus_readl(dbri->regs + REG8) - dbri->dma_dvma) |
666 | return dbri->dma->cmd; |
667 | else |
668 | printk(KERN_ERR "DBRI: no space for commands."); |
669 | |
670 | return NULL; |
671 | } |
672 | |
673 | /* |
674 | * Send prepared cmd string. It works by writing a JUMP cmd into |
675 | * the last WAIT cmd and force DBRI to reread the cmd. |
676 | * The JUMP cmd points to the new cmd string. |
677 | * It also releases the cmdlock spinlock. |
678 | * |
679 | * Lock must be held before calling this. |
680 | */ |
681 | static void dbri_cmdsend(struct snd_dbri *dbri, s32 *cmd, int len) |
682 | { |
683 | s32 tmp, addr; |
684 | static int wait_id = 0; |
685 | |
686 | wait_id++; |
687 | wait_id &= 0xffff; /* restrict it to a 16 bit counter. */ |
688 | *(cmd) = DBRI_CMD(D_WAIT, 1, wait_id); |
689 | *(cmd+1) = DBRI_CMD(D_WAIT, 1, wait_id); |
690 | |
691 | /* Replace the last command with JUMP */ |
692 | addr = dbri->dma_dvma + (cmd - len - dbri->dma->cmd) * sizeof(s32); |
693 | *(dbri->cmdptr+1) = addr; |
694 | *(dbri->cmdptr) = DBRI_CMD(D_JUMP, 0, 0); |
695 | |
696 | #ifdef DBRI_DEBUG |
697 | if (cmd > dbri->cmdptr) { |
698 | s32 *ptr; |
699 | |
700 | for (ptr = dbri->cmdptr; ptr < cmd+2; ptr++) |
701 | dprintk(D_CMD, "cmd: %lx:%08x\n", |
702 | (unsigned long)ptr, *ptr); |
703 | } else { |
704 | s32 *ptr = dbri->cmdptr; |
705 | |
706 | dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); |
707 | ptr++; |
708 | dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); |
709 | for (ptr = dbri->dma->cmd; ptr < cmd+2; ptr++) |
710 | dprintk(D_CMD, "cmd: %lx:%08x\n", |
711 | (unsigned long)ptr, *ptr); |
712 | } |
713 | #endif |
714 | |
715 | /* Reread the last command */ |
716 | tmp = sbus_readl(dbri->regs + REG0); |
717 | tmp |= D_P; |
718 | sbus_writel(tmp, dbri->regs + REG0); |
719 | |
720 | dbri->cmdptr = cmd; |
721 | spin_unlock(&dbri->cmdlock); |
722 | } |
723 | |
724 | /* Lock must be held when calling this */ |
725 | static void dbri_reset(struct snd_dbri *dbri) |
726 | { |
727 | int i; |
728 | u32 tmp; |
729 | |
730 | dprintk(D_GEN, "reset 0:%x 2:%x 8:%x 9:%x\n", |
731 | sbus_readl(dbri->regs + REG0), |
732 | sbus_readl(dbri->regs + REG2), |
733 | sbus_readl(dbri->regs + REG8), sbus_readl(dbri->regs + REG9)); |
734 | |
735 | sbus_writel(D_R, dbri->regs + REG0); /* Soft Reset */ |
736 | for (i = 0; (sbus_readl(dbri->regs + REG0) & D_R) && i < 64; i++) |
737 | udelay(10); |
738 | |
739 | /* A brute approach - DBRI falls back to working burst size by itself |
740 | * On SS20 D_S does not work, so do not try so high. */ |
741 | tmp = sbus_readl(dbri->regs + REG0); |
742 | tmp |= D_G | D_E; |
743 | tmp &= ~D_S; |
744 | sbus_writel(tmp, dbri->regs + REG0); |
745 | } |
746 | |
747 | /* Lock must not be held before calling this */ |
748 | static void dbri_initialize(struct snd_dbri *dbri) |
749 | { |
750 | s32 *cmd; |
751 | u32 dma_addr; |
752 | unsigned long flags; |
753 | int n; |
754 | |
755 | spin_lock_irqsave(&dbri->lock, flags); |
756 | |
757 | dbri_reset(dbri); |
758 | |
759 | /* Initialize pipes */ |
760 | for (n = 0; n < DBRI_NO_PIPES; n++) |
761 | dbri->pipes[n].desc = dbri->pipes[n].first_desc = -1; |
762 | |
763 | spin_lock_init(&dbri->cmdlock); |
764 | /* |
765 | * Initialize the interrupt ring buffer. |
766 | */ |
767 | dma_addr = dbri->dma_dvma + dbri_dma_off(intr, 0); |
768 | dbri->dma->intr[0] = dma_addr; |
769 | dbri->dbri_irqp = 1; |
770 | /* |
771 | * Set up the interrupt queue |
772 | */ |
773 | spin_lock(&dbri->cmdlock); |
774 | cmd = dbri->cmdptr = dbri->dma->cmd; |
775 | *(cmd++) = DBRI_CMD(D_IIQ, 0, 0); |
776 | *(cmd++) = dma_addr; |
777 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
778 | dbri->cmdptr = cmd; |
779 | *(cmd++) = DBRI_CMD(D_WAIT, 1, 0); |
780 | *(cmd++) = DBRI_CMD(D_WAIT, 1, 0); |
781 | dma_addr = dbri->dma_dvma + dbri_dma_off(cmd, 0); |
782 | sbus_writel(dma_addr, dbri->regs + REG8); |
783 | spin_unlock(&dbri->cmdlock); |
784 | |
785 | spin_unlock_irqrestore(&dbri->lock, flags); |
786 | dbri_cmdwait(dbri); |
787 | } |
788 | |
789 | /* |
790 | **************************************************************************** |
791 | ************************** DBRI data pipe management *********************** |
792 | **************************************************************************** |
793 | |
794 | While DBRI control functions use the command and interrupt buffers, the |
795 | main data path takes the form of data pipes, which can be short (command |
796 | and interrupt driven), or long (attached to DMA buffers). These functions |
797 | provide a rudimentary means of setting up and managing the DBRI's pipes, |
798 | but the calling functions have to make sure they respect the pipes' linked |
799 | list ordering, among other things. The transmit and receive functions |
800 | here interface closely with the transmit and receive interrupt code. |
801 | |
802 | */ |
803 | static inline int pipe_active(struct snd_dbri *dbri, int pipe) |
804 | { |
805 | return ((pipe >= 0) && (dbri->pipes[pipe].desc != -1)); |
806 | } |
807 | |
808 | /* reset_pipe(dbri, pipe) |
809 | * |
810 | * Called on an in-use pipe to clear anything being transmitted or received |
811 | * Lock must be held before calling this. |
812 | */ |
813 | static void reset_pipe(struct snd_dbri *dbri, int pipe) |
814 | { |
815 | int sdp; |
816 | int desc; |
817 | s32 *cmd; |
818 | |
819 | if (pipe < 0 || pipe > DBRI_MAX_PIPE) { |
820 | printk(KERN_ERR "DBRI: reset_pipe called with " |
821 | "illegal pipe number\n"); |
822 | return; |
823 | } |
824 | |
825 | sdp = dbri->pipes[pipe].sdp; |
826 | if (sdp == 0) { |
827 | printk(KERN_ERR "DBRI: reset_pipe called " |
828 | "on uninitialized pipe\n"); |
829 | return; |
830 | } |
831 | |
832 | cmd = dbri_cmdlock(dbri, 3); |
833 | *(cmd++) = DBRI_CMD(D_SDP, 0, sdp | D_SDP_C | D_SDP_P); |
834 | *(cmd++) = 0; |
835 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
836 | dbri_cmdsend(dbri, cmd, 3); |
837 | |
838 | desc = dbri->pipes[pipe].first_desc; |
839 | if (desc >= 0) |
840 | do { |
841 | dbri->dma->desc[desc].ba = 0; |
842 | dbri->dma->desc[desc].nda = 0; |
843 | desc = dbri->next_desc[desc]; |
844 | } while (desc != -1 && desc != dbri->pipes[pipe].first_desc); |
845 | |
846 | dbri->pipes[pipe].desc = -1; |
847 | dbri->pipes[pipe].first_desc = -1; |
848 | } |
849 | |
850 | /* |
851 | * Lock must be held before calling this. |
852 | */ |
853 | static void setup_pipe(struct snd_dbri *dbri, int pipe, int sdp) |
854 | { |
855 | if (pipe < 0 || pipe > DBRI_MAX_PIPE) { |
856 | printk(KERN_ERR "DBRI: setup_pipe called " |
857 | "with illegal pipe number\n"); |
858 | return; |
859 | } |
860 | |
861 | if ((sdp & 0xf800) != sdp) { |
862 | printk(KERN_ERR "DBRI: setup_pipe called " |
863 | "with strange SDP value\n"); |
864 | /* sdp &= 0xf800; */ |
865 | } |
866 | |
867 | /* If this is a fixed receive pipe, arrange for an interrupt |
868 | * every time its data changes |
869 | */ |
870 | if (D_SDP_MODE(sdp) == D_SDP_FIXED && !(sdp & D_SDP_TO_SER)) |
871 | sdp |= D_SDP_CHANGE; |
872 | |
873 | sdp |= D_PIPE(pipe); |
874 | dbri->pipes[pipe].sdp = sdp; |
875 | dbri->pipes[pipe].desc = -1; |
876 | dbri->pipes[pipe].first_desc = -1; |
877 | |
878 | reset_pipe(dbri, pipe); |
879 | } |
880 | |
881 | /* |
882 | * Lock must be held before calling this. |
883 | */ |
884 | static void link_time_slot(struct snd_dbri *dbri, int pipe, |
885 | int prevpipe, int nextpipe, |
886 | int length, int cycle) |
887 | { |
888 | s32 *cmd; |
889 | int val; |
890 | |
891 | if (pipe < 0 || pipe > DBRI_MAX_PIPE |
892 | || prevpipe < 0 || prevpipe > DBRI_MAX_PIPE |
893 | || nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) { |
894 | printk(KERN_ERR |
895 | "DBRI: link_time_slot called with illegal pipe number\n"); |
896 | return; |
897 | } |
898 | |
899 | if (dbri->pipes[pipe].sdp == 0 |
900 | || dbri->pipes[prevpipe].sdp == 0 |
901 | || dbri->pipes[nextpipe].sdp == 0) { |
902 | printk(KERN_ERR "DBRI: link_time_slot called " |
903 | "on uninitialized pipe\n"); |
904 | return; |
905 | } |
906 | |
907 | dbri->pipes[prevpipe].nextpipe = pipe; |
908 | dbri->pipes[pipe].nextpipe = nextpipe; |
909 | dbri->pipes[pipe].length = length; |
910 | |
911 | cmd = dbri_cmdlock(dbri, 4); |
912 | |
913 | if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) { |
914 | /* Deal with CHI special case: |
915 | * "If transmission on edges 0 or 1 is desired, then cycle n |
916 | * (where n = # of bit times per frame...) must be used." |
917 | * - DBRI data sheet, page 11 |
918 | */ |
919 | if (prevpipe == 16 && cycle == 0) |
920 | cycle = dbri->chi_bpf; |
921 | |
922 | val = D_DTS_VO | D_DTS_INS | D_DTS_PRVOUT(prevpipe) | pipe; |
923 | *(cmd++) = DBRI_CMD(D_DTS, 0, val); |
924 | *(cmd++) = 0; |
925 | *(cmd++) = |
926 | D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe); |
927 | } else { |
928 | val = D_DTS_VI | D_DTS_INS | D_DTS_PRVIN(prevpipe) | pipe; |
929 | *(cmd++) = DBRI_CMD(D_DTS, 0, val); |
930 | *(cmd++) = |
931 | D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe); |
932 | *(cmd++) = 0; |
933 | } |
934 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
935 | |
936 | dbri_cmdsend(dbri, cmd, 4); |
937 | } |
938 | |
939 | #if 0 |
940 | /* |
941 | * Lock must be held before calling this. |
942 | */ |
943 | static void unlink_time_slot(struct snd_dbri *dbri, int pipe, |
944 | enum in_or_out direction, int prevpipe, |
945 | int nextpipe) |
946 | { |
947 | s32 *cmd; |
948 | int val; |
949 | |
950 | if (pipe < 0 || pipe > DBRI_MAX_PIPE |
951 | || prevpipe < 0 || prevpipe > DBRI_MAX_PIPE |
952 | || nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) { |
953 | printk(KERN_ERR |
954 | "DBRI: unlink_time_slot called with illegal pipe number\n"); |
955 | return; |
956 | } |
957 | |
958 | cmd = dbri_cmdlock(dbri, 4); |
959 | |
960 | if (direction == PIPEinput) { |
961 | val = D_DTS_VI | D_DTS_DEL | D_DTS_PRVIN(prevpipe) | pipe; |
962 | *(cmd++) = DBRI_CMD(D_DTS, 0, val); |
963 | *(cmd++) = D_TS_NEXT(nextpipe); |
964 | *(cmd++) = 0; |
965 | } else { |
966 | val = D_DTS_VO | D_DTS_DEL | D_DTS_PRVOUT(prevpipe) | pipe; |
967 | *(cmd++) = DBRI_CMD(D_DTS, 0, val); |
968 | *(cmd++) = 0; |
969 | *(cmd++) = D_TS_NEXT(nextpipe); |
970 | } |
971 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
972 | |
973 | dbri_cmdsend(dbri, cmd, 4); |
974 | } |
975 | #endif |
976 | |
977 | /* xmit_fixed() / recv_fixed() |
978 | * |
979 | * Transmit/receive data on a "fixed" pipe - i.e, one whose contents are not |
980 | * expected to change much, and which we don't need to buffer. |
981 | * The DBRI only interrupts us when the data changes (receive pipes), |
982 | * or only changes the data when this function is called (transmit pipes). |
983 | * Only short pipes (numbers 16-31) can be used in fixed data mode. |
984 | * |
985 | * These function operate on a 32-bit field, no matter how large |
986 | * the actual time slot is. The interrupt handler takes care of bit |
987 | * ordering and alignment. An 8-bit time slot will always end up |
988 | * in the low-order 8 bits, filled either MSB-first or LSB-first, |
989 | * depending on the settings passed to setup_pipe(). |
990 | * |
991 | * Lock must not be held before calling it. |
992 | */ |
993 | static void xmit_fixed(struct snd_dbri *dbri, int pipe, unsigned int data) |
994 | { |
995 | s32 *cmd; |
996 | unsigned long flags; |
997 | |
998 | if (pipe < 16 || pipe > DBRI_MAX_PIPE) { |
999 | printk(KERN_ERR "DBRI: xmit_fixed: Illegal pipe number\n"); |
1000 | return; |
1001 | } |
1002 | |
1003 | if (D_SDP_MODE(dbri->pipes[pipe].sdp) == 0) { |
1004 | printk(KERN_ERR "DBRI: xmit_fixed: " |
1005 | "Uninitialized pipe %d\n", pipe); |
1006 | return; |
1007 | } |
1008 | |
1009 | if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) { |
1010 | printk(KERN_ERR "DBRI: xmit_fixed: Non-fixed pipe %d\n", pipe); |
1011 | return; |
1012 | } |
1013 | |
1014 | if (!(dbri->pipes[pipe].sdp & D_SDP_TO_SER)) { |
1015 | printk(KERN_ERR "DBRI: xmit_fixed: Called on receive pipe %d\n", |
1016 | pipe); |
1017 | return; |
1018 | } |
1019 | |
1020 | /* DBRI short pipes always transmit LSB first */ |
1021 | |
1022 | if (dbri->pipes[pipe].sdp & D_SDP_MSB) |
1023 | data = reverse_bytes(data, dbri->pipes[pipe].length); |
1024 | |
1025 | cmd = dbri_cmdlock(dbri, 3); |
1026 | |
1027 | *(cmd++) = DBRI_CMD(D_SSP, 0, pipe); |
1028 | *(cmd++) = data; |
1029 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
1030 | |
1031 | spin_lock_irqsave(&dbri->lock, flags); |
1032 | dbri_cmdsend(dbri, cmd, 3); |
1033 | spin_unlock_irqrestore(&dbri->lock, flags); |
1034 | dbri_cmdwait(dbri); |
1035 | |
1036 | } |
1037 | |
1038 | static void recv_fixed(struct snd_dbri *dbri, int pipe, volatile __u32 *ptr) |
1039 | { |
1040 | if (pipe < 16 || pipe > DBRI_MAX_PIPE) { |
1041 | printk(KERN_ERR "DBRI: recv_fixed called with " |
1042 | "illegal pipe number\n"); |
1043 | return; |
1044 | } |
1045 | |
1046 | if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) { |
1047 | printk(KERN_ERR "DBRI: recv_fixed called on " |
1048 | "non-fixed pipe %d\n", pipe); |
1049 | return; |
1050 | } |
1051 | |
1052 | if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) { |
1053 | printk(KERN_ERR "DBRI: recv_fixed called on " |
1054 | "transmit pipe %d\n", pipe); |
1055 | return; |
1056 | } |
1057 | |
1058 | dbri->pipes[pipe].recv_fixed_ptr = ptr; |
1059 | } |
1060 | |
1061 | /* setup_descs() |
1062 | * |
1063 | * Setup transmit/receive data on a "long" pipe - i.e, one associated |
1064 | * with a DMA buffer. |
1065 | * |
1066 | * Only pipe numbers 0-15 can be used in this mode. |
1067 | * |
1068 | * This function takes a stream number pointing to a data buffer, |
1069 | * and work by building chains of descriptors which identify the |
1070 | * data buffers. Buffers too large for a single descriptor will |
1071 | * be spread across multiple descriptors. |
1072 | * |
1073 | * All descriptors create a ring buffer. |
1074 | * |
1075 | * Lock must be held before calling this. |
1076 | */ |
1077 | static int setup_descs(struct snd_dbri *dbri, int streamno, unsigned int period) |
1078 | { |
1079 | struct dbri_streaminfo *info = &dbri->stream_info[streamno]; |
1080 | __u32 dvma_buffer; |
1081 | int desc; |
1082 | int len; |
1083 | int first_desc = -1; |
1084 | int last_desc = -1; |
1085 | |
1086 | if (info->pipe < 0 || info->pipe > 15) { |
1087 | printk(KERN_ERR "DBRI: setup_descs: Illegal pipe number\n"); |
1088 | return -2; |
1089 | } |
1090 | |
1091 | if (dbri->pipes[info->pipe].sdp == 0) { |
1092 | printk(KERN_ERR "DBRI: setup_descs: Uninitialized pipe %d\n", |
1093 | info->pipe); |
1094 | return -2; |
1095 | } |
1096 | |
1097 | dvma_buffer = info->dvma_buffer; |
1098 | len = info->size; |
1099 | |
1100 | if (streamno == DBRI_PLAY) { |
1101 | if (!(dbri->pipes[info->pipe].sdp & D_SDP_TO_SER)) { |
1102 | printk(KERN_ERR "DBRI: setup_descs: " |
1103 | "Called on receive pipe %d\n", info->pipe); |
1104 | return -2; |
1105 | } |
1106 | } else { |
1107 | if (dbri->pipes[info->pipe].sdp & D_SDP_TO_SER) { |
1108 | printk(KERN_ERR |
1109 | "DBRI: setup_descs: Called on transmit pipe %d\n", |
1110 | info->pipe); |
1111 | return -2; |
1112 | } |
1113 | /* Should be able to queue multiple buffers |
1114 | * to receive on a pipe |
1115 | */ |
1116 | if (pipe_active(dbri, info->pipe)) { |
1117 | printk(KERN_ERR "DBRI: recv_on_pipe: " |
1118 | "Called on active pipe %d\n", info->pipe); |
1119 | return -2; |
1120 | } |
1121 | |
1122 | /* Make sure buffer size is multiple of four */ |
1123 | len &= ~3; |
1124 | } |
1125 | |
1126 | /* Free descriptors if pipe has any */ |
1127 | desc = dbri->pipes[info->pipe].first_desc; |
1128 | if (desc >= 0) |
1129 | do { |
1130 | dbri->dma->desc[desc].ba = 0; |
1131 | dbri->dma->desc[desc].nda = 0; |
1132 | desc = dbri->next_desc[desc]; |
1133 | } while (desc != -1 && |
1134 | desc != dbri->pipes[info->pipe].first_desc); |
1135 | |
1136 | dbri->pipes[info->pipe].desc = -1; |
1137 | dbri->pipes[info->pipe].first_desc = -1; |
1138 | |
1139 | desc = 0; |
1140 | while (len > 0) { |
1141 | int mylen; |
1142 | |
1143 | for (; desc < DBRI_NO_DESCS; desc++) { |
1144 | if (!dbri->dma->desc[desc].ba) |
1145 | break; |
1146 | } |
1147 | |
1148 | if (desc == DBRI_NO_DESCS) { |
1149 | printk(KERN_ERR "DBRI: setup_descs: No descriptors\n"); |
1150 | return -1; |
1151 | } |
1152 | |
1153 | if (len > DBRI_TD_MAXCNT) |
1154 | mylen = DBRI_TD_MAXCNT; /* 8KB - 4 */ |
1155 | else |
1156 | mylen = len; |
1157 | |
1158 | if (mylen > period) |
1159 | mylen = period; |
1160 | |
1161 | dbri->next_desc[desc] = -1; |
1162 | dbri->dma->desc[desc].ba = dvma_buffer; |
1163 | dbri->dma->desc[desc].nda = 0; |
1164 | |
1165 | if (streamno == DBRI_PLAY) { |
1166 | dbri->dma->desc[desc].word1 = DBRI_TD_CNT(mylen); |
1167 | dbri->dma->desc[desc].word4 = 0; |
1168 | dbri->dma->desc[desc].word1 |= DBRI_TD_F | DBRI_TD_B; |
1169 | } else { |
1170 | dbri->dma->desc[desc].word1 = 0; |
1171 | dbri->dma->desc[desc].word4 = |
1172 | DBRI_RD_B | DBRI_RD_BCNT(mylen); |
1173 | } |
1174 | |
1175 | if (first_desc == -1) |
1176 | first_desc = desc; |
1177 | else { |
1178 | dbri->next_desc[last_desc] = desc; |
1179 | dbri->dma->desc[last_desc].nda = |
1180 | dbri->dma_dvma + dbri_dma_off(desc, desc); |
1181 | } |
1182 | |
1183 | last_desc = desc; |
1184 | dvma_buffer += mylen; |
1185 | len -= mylen; |
1186 | } |
1187 | |
1188 | if (first_desc == -1 || last_desc == -1) { |
1189 | printk(KERN_ERR "DBRI: setup_descs: " |
1190 | " Not enough descriptors available\n"); |
1191 | return -1; |
1192 | } |
1193 | |
1194 | dbri->dma->desc[last_desc].nda = |
1195 | dbri->dma_dvma + dbri_dma_off(desc, first_desc); |
1196 | dbri->next_desc[last_desc] = first_desc; |
1197 | dbri->pipes[info->pipe].first_desc = first_desc; |
1198 | dbri->pipes[info->pipe].desc = first_desc; |
1199 | |
1200 | #ifdef DBRI_DEBUG |
1201 | for (desc = first_desc; desc != -1;) { |
1202 | dprintk(D_DESC, "DESC %d: %08x %08x %08x %08x\n", |
1203 | desc, |
1204 | dbri->dma->desc[desc].word1, |
1205 | dbri->dma->desc[desc].ba, |
1206 | dbri->dma->desc[desc].nda, dbri->dma->desc[desc].word4); |
1207 | desc = dbri->next_desc[desc]; |
1208 | if (desc == first_desc) |
1209 | break; |
1210 | } |
1211 | #endif |
1212 | return 0; |
1213 | } |
1214 | |
1215 | /* |
1216 | **************************************************************************** |
1217 | ************************** DBRI - CHI interface **************************** |
1218 | **************************************************************************** |
1219 | |
1220 | The CHI is a four-wire (clock, frame sync, data in, data out) time-division |
1221 | multiplexed serial interface which the DBRI can operate in either master |
1222 | (give clock/frame sync) or slave (take clock/frame sync) mode. |
1223 | |
1224 | */ |
1225 | |
1226 | enum master_or_slave { CHImaster, CHIslave }; |
1227 | |
1228 | /* |
1229 | * Lock must not be held before calling it. |
1230 | */ |
1231 | static void reset_chi(struct snd_dbri *dbri, |
1232 | enum master_or_slave master_or_slave, |
1233 | int bits_per_frame) |
1234 | { |
1235 | s32 *cmd; |
1236 | int val; |
1237 | |
1238 | /* Set CHI Anchor: Pipe 16 */ |
1239 | |
1240 | cmd = dbri_cmdlock(dbri, 4); |
1241 | val = D_DTS_VO | D_DTS_VI | D_DTS_INS |
1242 | | D_DTS_PRVIN(16) | D_PIPE(16) | D_DTS_PRVOUT(16); |
1243 | *(cmd++) = DBRI_CMD(D_DTS, 0, val); |
1244 | *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16); |
1245 | *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16); |
1246 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
1247 | dbri_cmdsend(dbri, cmd, 4); |
1248 | |
1249 | dbri->pipes[16].sdp = 1; |
1250 | dbri->pipes[16].nextpipe = 16; |
1251 | |
1252 | cmd = dbri_cmdlock(dbri, 4); |
1253 | |
1254 | if (master_or_slave == CHIslave) { |
1255 | /* Setup DBRI for CHI Slave - receive clock, frame sync (FS) |
1256 | * |
1257 | * CHICM = 0 (slave mode, 8 kHz frame rate) |
1258 | * IR = give immediate CHI status interrupt |
1259 | * EN = give CHI status interrupt upon change |
1260 | */ |
1261 | *(cmd++) = DBRI_CMD(D_CHI, 0, D_CHI_CHICM(0)); |
1262 | } else { |
1263 | /* Setup DBRI for CHI Master - generate clock, FS |
1264 | * |
1265 | * BPF = bits per 8 kHz frame |
1266 | * 12.288 MHz / CHICM_divisor = clock rate |
1267 | * FD = 1 - drive CHIFS on rising edge of CHICK |
1268 | */ |
1269 | int clockrate = bits_per_frame * 8; |
1270 | int divisor = 12288 / clockrate; |
1271 | |
1272 | if (divisor > 255 || divisor * clockrate != 12288) |
1273 | printk(KERN_ERR "DBRI: illegal bits_per_frame " |
1274 | "in setup_chi\n"); |
1275 | |
1276 | *(cmd++) = DBRI_CMD(D_CHI, 0, D_CHI_CHICM(divisor) | D_CHI_FD |
1277 | | D_CHI_BPF(bits_per_frame)); |
1278 | } |
1279 | |
1280 | dbri->chi_bpf = bits_per_frame; |
1281 | |
1282 | /* CHI Data Mode |
1283 | * |
1284 | * RCE = 0 - receive on falling edge of CHICK |
1285 | * XCE = 1 - transmit on rising edge of CHICK |
1286 | * XEN = 1 - enable transmitter |
1287 | * REN = 1 - enable receiver |
1288 | */ |
1289 | |
1290 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
1291 | *(cmd++) = DBRI_CMD(D_CDM, 0, D_CDM_XCE | D_CDM_XEN | D_CDM_REN); |
1292 | *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); |
1293 | |
1294 | dbri_cmdsend(dbri, cmd, 4); |
1295 | } |
1296 | |
1297 | /* |
1298 | **************************************************************************** |
1299 | *********************** CS4215 audio codec management ********************** |
1300 | **************************************************************************** |
1301 | |
1302 | In the standard SPARC audio configuration, the CS4215 codec is attached |
1303 | to the DBRI via the CHI interface and few of the DBRI's PIO pins. |
1304 | |
1305 | * Lock must not be held before calling it. |
1306 | |
1307 | */ |
1308 | static void cs4215_setup_pipes(struct snd_dbri *dbri) |
1309 | { |
1310 | unsigned long flags; |
1311 | |
1312 | spin_lock_irqsave(&dbri->lock, flags); |
1313 | /* |
1314 | * Data mode: |
1315 | * Pipe 4: Send timeslots 1-4 (audio data) |
1316 | * Pipe 20: Send timeslots 5-8 (part of ctrl data) |
1317 | * Pipe 6: Receive timeslots 1-4 (audio data) |
1318 | * Pipe 21: Receive timeslots 6-7. We can only receive 20 bits via |
1319 | * interrupt, and the rest of the data (slot 5 and 8) is |
1320 | * not relevant for us (only for doublechecking). |
1321 | * |
1322 | * Control mode: |
1323 | * Pipe 17: Send timeslots 1-4 (slots 5-8 are read only) |
1324 | * Pipe 18: Receive timeslot 1 (clb). |
1325 | * Pipe 19: Receive timeslot 7 (version). |
1326 | */ |
1327 | |
1328 | setup_pipe(dbri, 4, D_SDP_MEM | D_SDP_TO_SER | D_SDP_MSB); |
1329 | setup_pipe(dbri, 20, D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB); |
1330 | setup_pipe(dbri, 6, D_SDP_MEM | D_SDP_FROM_SER | D_SDP_MSB); |
1331 | setup_pipe(dbri, 21, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB); |
1332 | |
1333 | setup_pipe(dbri, 17, D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB); |
1334 | setup_pipe(dbri, 18, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB); |
1335 | setup_pipe(dbri, 19, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB); |
1336 | spin_unlock_irqrestore(&dbri->lock, flags); |
1337 | |
1338 | dbri_cmdwait(dbri); |
1339 | } |
1340 | |
1341 | static int cs4215_init_data(struct cs4215 *mm) |
1342 | { |
1343 | /* |
1344 | * No action, memory resetting only. |
1345 | * |
1346 | * Data Time Slot 5-8 |
1347 | * Speaker,Line and Headphone enable. Gain set to the half. |
1348 | * Input is mike. |
1349 | */ |
1350 | mm->data[0] = CS4215_LO(0x20) | CS4215_HE | CS4215_LE; |
1351 | mm->data[1] = CS4215_RO(0x20) | CS4215_SE; |
1352 | mm->data[2] = CS4215_LG(0x8) | CS4215_IS | CS4215_PIO0 | CS4215_PIO1; |
1353 | mm->data[3] = CS4215_RG(0x8) | CS4215_MA(0xf); |
1354 | |
1355 | /* |
1356 | * Control Time Slot 1-4 |
1357 | * 0: Default I/O voltage scale |
1358 | * 1: 8 bit ulaw, 8kHz, mono, high pass filter disabled |
1359 | * 2: Serial enable, CHI master, 128 bits per frame, clock 1 |
1360 | * 3: Tests disabled |
1361 | */ |
1362 | mm->ctrl[0] = CS4215_RSRVD_1 | CS4215_MLB; |
1363 | mm->ctrl[1] = CS4215_DFR_ULAW | CS4215_FREQ[0].csval; |
1364 | mm->ctrl[2] = CS4215_XCLK | CS4215_BSEL_128 | CS4215_FREQ[0].xtal; |
1365 | mm->ctrl[3] = 0; |
1366 | |
1367 | mm->status = 0; |
1368 | mm->version = 0xff; |
1369 | mm->precision = 8; /* For ULAW */ |
1370 | mm->channels = 1; |
1371 | |
1372 | return 0; |
1373 | } |
1374 | |
1375 | static void cs4215_setdata(struct snd_dbri *dbri, int muted) |
1376 | { |
1377 | if (muted) { |
1378 | dbri->mm.data[0] |= 63; |
1379 | dbri->mm.data[1] |= 63; |
1380 | dbri->mm.data[2] &= ~15; |
1381 | dbri->mm.data[3] &= ~15; |
1382 | } else { |
1383 | /* Start by setting the playback attenuation. */ |
1384 | struct dbri_streaminfo *info = &dbri->stream_info[DBRI_PLAY]; |
1385 | int left_gain = info->left_gain & 0x3f; |
1386 | int right_gain = info->right_gain & 0x3f; |
1387 | |
1388 | dbri->mm.data[0] &= ~0x3f; /* Reset the volume bits */ |
1389 | dbri->mm.data[1] &= ~0x3f; |
1390 | dbri->mm.data[0] |= (DBRI_MAX_VOLUME - left_gain); |
1391 | dbri->mm.data[1] |= (DBRI_MAX_VOLUME - right_gain); |
1392 | |
1393 | /* Now set the recording gain. */ |
1394 | info = &dbri->stream_info[DBRI_REC]; |
1395 | left_gain = info->left_gain & 0xf; |
1396 | right_gain = info->right_gain & 0xf; |
1397 | dbri->mm.data[2] |= CS4215_LG(left_gain); |
1398 | dbri->mm.data[3] |= CS4215_RG(right_gain); |
1399 | } |
1400 | |
1401 | xmit_fixed(dbri, 20, *(int *)dbri->mm.data); |
1402 | } |
1403 | |
1404 | /* |
1405 | * Set the CS4215 to data mode. |
1406 | */ |
1407 | static void cs4215_open(struct snd_dbri *dbri) |
1408 | { |
1409 | int data_width; |
1410 | u32 tmp; |
1411 | unsigned long flags; |
1412 | |
1413 | dprintk(D_MM, "cs4215_open: %d channels, %d bits\n", |
1414 | dbri->mm.channels, dbri->mm.precision); |
1415 | |
1416 | /* Temporarily mute outputs, and wait 1/8000 sec (125 us) |
1417 | * to make sure this takes. This avoids clicking noises. |
1418 | */ |
1419 | |
1420 | cs4215_setdata(dbri, 1); |
1421 | udelay(125); |
1422 | |
1423 | /* |
1424 | * Data mode: |
1425 | * Pipe 4: Send timeslots 1-4 (audio data) |
1426 | * Pipe 20: Send timeslots 5-8 (part of ctrl data) |
1427 | * Pipe 6: Receive timeslots 1-4 (audio data) |
1428 | * Pipe 21: Receive timeslots 6-7. We can only receive 20 bits via |
1429 | * interrupt, and the rest of the data (slot 5 and 8) is |
1430 | * not relevant for us (only for doublechecking). |
1431 | * |
1432 | * Just like in control mode, the time slots are all offset by eight |
1433 | * bits. The CS4215, it seems, observes TSIN (the delayed signal) |
1434 | * even if it's the CHI master. Don't ask me... |
1435 | */ |
1436 | spin_lock_irqsave(&dbri->lock, flags); |
1437 | tmp = sbus_readl(dbri->regs + REG0); |
1438 | tmp &= ~(D_C); /* Disable CHI */ |
1439 | sbus_writel(tmp, dbri->regs + REG0); |
1440 | |
1441 | /* Switch CS4215 to data mode - set PIO3 to 1 */ |
1442 | sbus_writel(D_ENPIO | D_PIO1 | D_PIO3 | |
1443 | (dbri->mm.onboard ? D_PIO0 : D_PIO2), dbri->regs + REG2); |
1444 | |
1445 | reset_chi(dbri, CHIslave, 128); |
1446 | |
1447 | /* Note: this next doesn't work for 8-bit stereo, because the two |
1448 | * channels would be on timeslots 1 and 3, with 2 and 4 idle. |
1449 | * (See CS4215 datasheet Fig 15) |
1450 | * |
1451 | * DBRI non-contiguous mode would be required to make this work. |
1452 | */ |
1453 | data_width = dbri->mm.channels * dbri->mm.precision; |
1454 | |
1455 | link_time_slot(dbri, 4, 16, 16, data_width, dbri->mm.offset); |
1456 | link_time_slot(dbri, 20, 4, 16, 32, dbri->mm.offset + 32); |
1457 | link_time_slot(dbri, 6, 16, 16, data_width, dbri->mm.offset); |
1458 | link_time_slot(dbri, 21, 6, 16, 16, dbri->mm.offset + 40); |
1459 | |
1460 | /* FIXME: enable CHI after _setdata? */ |
1461 | tmp = sbus_readl(dbri->regs + REG0); |
1462 | tmp |= D_C; /* Enable CHI */ |
1463 | sbus_writel(tmp, dbri->regs + REG0); |
1464 | spin_unlock_irqrestore(&dbri->lock, flags); |
1465 | |
1466 | cs4215_setdata(dbri, 0); |
1467 | } |
1468 | |
1469 | /* |
1470 | * Send the control information (i.e. audio format) |
1471 | */ |
1472 | static int cs4215_setctrl(struct snd_dbri *dbri) |
1473 | { |
1474 | int i, val; |
1475 | u32 tmp; |
1476 | unsigned long flags; |
1477 | |
1478 | /* FIXME - let the CPU do something useful during these delays */ |
1479 | |
1480 | /* Temporarily mute outputs, and wait 1/8000 sec (125 us) |
1481 | * to make sure this takes. This avoids clicking noises. |
1482 | */ |
1483 | cs4215_setdata(dbri, 1); |
1484 | udelay(125); |
1485 | |
1486 | /* |
1487 | * Enable Control mode: Set DBRI's PIO3 (4215's D/~C) to 0, then wait |
1488 | * 12 cycles <= 12/(5512.5*64) sec = 34.01 usec |
1489 | */ |
1490 | val = D_ENPIO | D_PIO1 | (dbri->mm.onboard ? D_PIO0 : D_PIO2); |
1491 | sbus_writel(val, dbri->regs + REG2); |
1492 | dprintk(D_MM, "cs4215_setctrl: reg2=0x%x\n", val); |
1493 | udelay(34); |
1494 | |
1495 | /* In Control mode, the CS4215 is a slave device, so the DBRI must |
1496 | * operate as CHI master, supplying clocking and frame synchronization. |
1497 | * |
1498 | * In Data mode, however, the CS4215 must be CHI master to insure |
1499 | * that its data stream is synchronous with its codec. |
1500 | * |
1501 | * The upshot of all this? We start by putting the DBRI into master |
1502 | * mode, program the CS4215 in Control mode, then switch the CS4215 |
1503 | * into Data mode and put the DBRI into slave mode. Various timing |
1504 | * requirements must be observed along the way. |
1505 | * |
1506 | * Oh, and one more thing, on a SPARCStation 20 (and maybe |
1507 | * others?), the addressing of the CS4215's time slots is |
1508 | * offset by eight bits, so we add eight to all the "cycle" |
1509 | * values in the Define Time Slot (DTS) commands. This is |
1510 | * done in hardware by a TI 248 that delays the DBRI->4215 |
1511 | * frame sync signal by eight clock cycles. Anybody know why? |
1512 | */ |
1513 | spin_lock_irqsave(&dbri->lock, flags); |
1514 | tmp = sbus_readl(dbri->regs + REG0); |
1515 | tmp &= ~D_C; /* Disable CHI */ |
1516 | sbus_writel(tmp, dbri->regs + REG0); |
1517 | |
1518 | reset_chi(dbri, CHImaster, 128); |
1519 | |
1520 | /* |
1521 | * Control mode: |
1522 | * Pipe 17: Send timeslots 1-4 (slots 5-8 are read only) |
1523 | * Pipe 18: Receive timeslot 1 (clb). |
1524 | * Pipe 19: Receive timeslot 7 (version). |
1525 | */ |
1526 | |
1527 | link_time_slot(dbri, 17, 16, 16, 32, dbri->mm.offset); |
1528 | link_time_slot(dbri, 18, 16, 16, 8, dbri->mm.offset); |
1529 | link_time_slot(dbri, 19, 18, 16, 8, dbri->mm.offset + 48); |
1530 | spin_unlock_irqrestore(&dbri->lock, flags); |
1531 | |
1532 | /* Wait for the chip to echo back CLB (Control Latch Bit) as zero */ |
1533 | dbri->mm.ctrl[0] &= ~CS4215_CLB; |
1534 | xmit_fixed(dbri, 17, *(int *)dbri->mm.ctrl); |
1535 | |
1536 | spin_lock_irqsave(&dbri->lock, flags); |
1537 | tmp = sbus_readl(dbri->regs + REG0); |
1538 | tmp |= D_C; /* Enable CHI */ |
1539 | sbus_writel(tmp, dbri->regs + REG0); |
1540 | spin_unlock_irqrestore(&dbri->lock, flags); |
1541 | |
1542 | for (i = 10; ((dbri->mm.status & 0xe4) != 0x20); --i) |
1543 | msleep_interruptible(1); |
1544 | |
1545 | if (i == 0) { |
1546 | dprintk(D_MM, "CS4215 didn't respond to CLB (0x%02x)\n", |
1547 | dbri->mm.status); |
1548 | return -1; |
1549 | } |
1550 | |
1551 | /* Disable changes to our copy of the version number, as we are about |
1552 | * to leave control mode. |
1553 | */ |
1554 | recv_fixed(dbri, 19, NULL); |
1555 | |
1556 | /* Terminate CS4215 control mode - data sheet says |
1557 | * "Set CLB=1 and send two more frames of valid control info" |
1558 | */ |
1559 | dbri->mm.ctrl[0] |= CS4215_CLB; |
1560 | xmit_fixed(dbri, 17, *(int *)dbri->mm.ctrl); |
1561 | |
1562 | /* Two frames of control info @ 8kHz frame rate = 250 us delay */ |
1563 | udelay(250); |
1564 | |
1565 | cs4215_setdata(dbri, 0); |
1566 | |
1567 | return 0; |
1568 | } |
1569 | |
1570 | /* |
1571 | * Setup the codec with the sampling rate, audio format and number of |
1572 | * channels. |
1573 | * As part of the process we resend the settings for the data |
1574 | * timeslots as well. |
1575 | */ |
1576 | static int cs4215_prepare(struct snd_dbri *dbri, unsigned int rate, |
1577 | snd_pcm_format_t format, unsigned int channels) |
1578 | { |
1579 | int freq_idx; |
1580 | int ret = 0; |
1581 | |
1582 | /* Lookup index for this rate */ |
1583 | for (freq_idx = 0; CS4215_FREQ[freq_idx].freq != 0; freq_idx++) { |
1584 | if (CS4215_FREQ[freq_idx].freq == rate) |
1585 | break; |
1586 | } |
1587 | if (CS4215_FREQ[freq_idx].freq != rate) { |
1588 | printk(KERN_WARNING "DBRI: Unsupported rate %d Hz\n", rate); |
1589 | return -1; |
1590 | } |
1591 | |
1592 | switch (format) { |
1593 | case SNDRV_PCM_FORMAT_MU_LAW: |
1594 | dbri->mm.ctrl[1] = CS4215_DFR_ULAW; |
1595 | dbri->mm.precision = 8; |
1596 | break; |
1597 | case SNDRV_PCM_FORMAT_A_LAW: |
1598 | dbri->mm.ctrl[1] = CS4215_DFR_ALAW; |
1599 | dbri->mm.precision = 8; |
1600 | break; |
1601 | case SNDRV_PCM_FORMAT_U8: |
1602 | dbri->mm.ctrl[1] = CS4215_DFR_LINEAR8; |
1603 | dbri->mm.precision = 8; |
1604 | break; |
1605 | case SNDRV_PCM_FORMAT_S16_BE: |
1606 | dbri->mm.ctrl[1] = CS4215_DFR_LINEAR16; |
1607 | dbri->mm.precision = 16; |
1608 | break; |
1609 | default: |
1610 | printk(KERN_WARNING "DBRI: Unsupported format %d\n", format); |
1611 | return -1; |
1612 | } |
1613 | |
1614 | /* Add rate parameters */ |
1615 | dbri->mm.ctrl[1] |= CS4215_FREQ[freq_idx].csval; |
1616 | dbri->mm.ctrl[2] = CS4215_XCLK | |
1617 | CS4215_BSEL_128 | CS4215_FREQ[freq_idx].xtal; |
1618 | |
1619 | dbri->mm.channels = channels; |
1620 | if (channels == 2) |
1621 | dbri->mm.ctrl[1] |= CS4215_DFR_STEREO; |
1622 | |
1623 | ret = cs4215_setctrl(dbri); |
1624 | if (ret == 0) |
1625 | cs4215_open(dbri); /* set codec to data mode */ |
1626 | |
1627 | return ret; |
1628 | } |
1629 | |
1630 | /* |
1631 | * |
1632 | */ |
1633 | static int cs4215_init(struct snd_dbri *dbri) |
1634 | { |
1635 | u32 reg2 = sbus_readl(dbri->regs + REG2); |
1636 | dprintk(D_MM, "cs4215_init: reg2=0x%x\n", reg2); |
1637 | |
1638 | /* Look for the cs4215 chips */ |
1639 | if (reg2 & D_PIO2) { |
1640 | dprintk(D_MM, "Onboard CS4215 detected\n"); |
1641 | dbri->mm.onboard = 1; |
1642 | } |
1643 | if (reg2 & D_PIO0) { |
1644 | dprintk(D_MM, "Speakerbox detected\n"); |
1645 | dbri->mm.onboard = 0; |
1646 | |
1647 | if (reg2 & D_PIO2) { |
1648 | printk(KERN_INFO "DBRI: Using speakerbox / " |
1649 | "ignoring onboard mmcodec.\n"); |
1650 | sbus_writel(D_ENPIO2, dbri->regs + REG2); |
1651 | } |
1652 | } |
1653 | |
1654 | if (!(reg2 & (D_PIO0 | D_PIO2))) { |
1655 | printk(KERN_ERR "DBRI: no mmcodec found.\n"); |
1656 | return -EIO; |
1657 | } |
1658 | |
1659 | cs4215_setup_pipes(dbri); |
1660 | cs4215_init_data(&dbri->mm); |
1661 | |
1662 | /* Enable capture of the status & version timeslots. */ |
1663 | recv_fixed(dbri, 18, &dbri->mm.status); |
1664 | recv_fixed(dbri, 19, &dbri->mm.version); |
1665 | |
1666 | dbri->mm.offset = dbri->mm.onboard ? 0 : 8; |
1667 | if (cs4215_setctrl(dbri) == -1 || dbri->mm.version == 0xff) { |
1668 | dprintk(D_MM, "CS4215 failed probe at offset %d\n", |
1669 | dbri->mm.offset); |
1670 | return -EIO; |
1671 | } |
1672 | dprintk(D_MM, "Found CS4215 at offset %d\n", dbri->mm.offset); |
1673 | |
1674 | return 0; |
1675 | } |
1676 | |
1677 | /* |
1678 | **************************************************************************** |
1679 | *************************** DBRI interrupt handler ************************* |
1680 | **************************************************************************** |
1681 | |
1682 | The DBRI communicates with the CPU mainly via a circular interrupt |
1683 | buffer. When an interrupt is signaled, the CPU walks through the |
1684 | buffer and calls dbri_process_one_interrupt() for each interrupt word. |
1685 | Complicated interrupts are handled by dedicated functions (which |
1686 | appear first in this file). Any pending interrupts can be serviced by |
1687 | calling dbri_process_interrupt_buffer(), which works even if the CPU's |
1688 | interrupts are disabled. |
1689 | |
1690 | */ |
1691 | |
1692 | /* xmit_descs() |
1693 | * |
1694 | * Starts transmitting the current TD's for recording/playing. |
1695 | * For playback, ALSA has filled the DMA memory with new data (we hope). |
1696 | */ |
1697 | static void xmit_descs(struct snd_dbri *dbri) |
1698 | { |
1699 | struct dbri_streaminfo *info; |
1700 | s32 *cmd; |
1701 | unsigned long flags; |
1702 | int first_td; |
1703 | |
1704 | if (dbri == NULL) |
1705 | return; /* Disabled */ |
1706 | |
1707 | info = &dbri->stream_info[DBRI_REC]; |
1708 | spin_lock_irqsave(&dbri->lock, flags); |
1709 | |
1710 | if (info->pipe >= 0) { |
1711 | first_td = dbri->pipes[info->pipe].first_desc; |
1712 | |
1713 | dprintk(D_DESC, "xmit_descs rec @ TD %d\n", first_td); |
1714 | |
1715 | /* Stream could be closed by the time we run. */ |
1716 | if (first_td >= 0) { |
1717 | cmd = dbri_cmdlock(dbri, 2); |
1718 | *(cmd++) = DBRI_CMD(D_SDP, 0, |
1719 | dbri->pipes[info->pipe].sdp |
1720 | | D_SDP_P | D_SDP_EVERY | D_SDP_C); |
1721 | *(cmd++) = dbri->dma_dvma + |
1722 | dbri_dma_off(desc, first_td); |
1723 | dbri_cmdsend(dbri, cmd, 2); |
1724 | |
1725 | /* Reset our admin of the pipe. */ |
1726 | dbri->pipes[info->pipe].desc = first_td; |
1727 | } |
1728 | } |
1729 | |
1730 | info = &dbri->stream_info[DBRI_PLAY]; |
1731 | |
1732 | if (info->pipe >= 0) { |
1733 | first_td = dbri->pipes[info->pipe].first_desc; |
1734 | |
1735 | dprintk(D_DESC, "xmit_descs play @ TD %d\n", first_td); |
1736 | |
1737 | /* Stream could be closed by the time we run. */ |
1738 | if (first_td >= 0) { |
1739 | cmd = dbri_cmdlock(dbri, 2); |
1740 | *(cmd++) = DBRI_CMD(D_SDP, 0, |
1741 | dbri->pipes[info->pipe].sdp |
1742 | | D_SDP_P | D_SDP_EVERY | D_SDP_C); |
1743 | *(cmd++) = dbri->dma_dvma + |
1744 | dbri_dma_off(desc, first_td); |
1745 | dbri_cmdsend(dbri, cmd, 2); |
1746 | |
1747 | /* Reset our admin of the pipe. */ |
1748 | dbri->pipes[info->pipe].desc = first_td; |
1749 | } |
1750 | } |
1751 | |
1752 | spin_unlock_irqrestore(&dbri->lock, flags); |
1753 | } |
1754 | |
1755 | /* transmission_complete_intr() |
1756 | * |
1757 | * Called by main interrupt handler when DBRI signals transmission complete |
1758 | * on a pipe (interrupt triggered by the B bit in a transmit descriptor). |
1759 | * |
1760 | * Walks through the pipe's list of transmit buffer descriptors and marks |
1761 | * them as available. Stops when the first descriptor is found without |
1762 | * TBC (Transmit Buffer Complete) set, or we've run through them all. |
1763 | * |
1764 | * The DMA buffers are not released. They form a ring buffer and |
1765 | * they are filled by ALSA while others are transmitted by DMA. |
1766 | * |
1767 | */ |
1768 | |
1769 | static void transmission_complete_intr(struct snd_dbri *dbri, int pipe) |
1770 | { |
1771 | struct dbri_streaminfo *info = &dbri->stream_info[DBRI_PLAY]; |
1772 | int td = dbri->pipes[pipe].desc; |
1773 | int status; |
1774 | |
1775 | while (td >= 0) { |
1776 | if (td >= DBRI_NO_DESCS) { |
1777 | printk(KERN_ERR "DBRI: invalid td on pipe %d\n", pipe); |
1778 | return; |
1779 | } |
1780 | |
1781 | status = DBRI_TD_STATUS(dbri->dma->desc[td].word4); |
1782 | if (!(status & DBRI_TD_TBC)) |
1783 | break; |
1784 | |
1785 | dprintk(D_INT, "TD %d, status 0x%02x\n", td, status); |
1786 | |
1787 | dbri->dma->desc[td].word4 = 0; /* Reset it for next time. */ |
1788 | info->offset += DBRI_RD_CNT(dbri->dma->desc[td].word1); |
1789 | |
1790 | td = dbri->next_desc[td]; |
1791 | dbri->pipes[pipe].desc = td; |
1792 | } |
1793 | |
1794 | /* Notify ALSA */ |
1795 | spin_unlock(&dbri->lock); |
1796 | snd_pcm_period_elapsed(info->substream); |
1797 | spin_lock(&dbri->lock); |
1798 | } |
1799 | |
1800 | static void reception_complete_intr(struct snd_dbri *dbri, int pipe) |
1801 | { |
1802 | struct dbri_streaminfo *info; |
1803 | int rd = dbri->pipes[pipe].desc; |
1804 | s32 status; |
1805 | |
1806 | if (rd < 0 || rd >= DBRI_NO_DESCS) { |
1807 | printk(KERN_ERR "DBRI: invalid rd on pipe %d\n", pipe); |
1808 | return; |
1809 | } |
1810 | |
1811 | dbri->pipes[pipe].desc = dbri->next_desc[rd]; |
1812 | status = dbri->dma->desc[rd].word1; |
1813 | dbri->dma->desc[rd].word1 = 0; /* Reset it for next time. */ |
1814 | |
1815 | info = &dbri->stream_info[DBRI_REC]; |
1816 | info->offset += DBRI_RD_CNT(status); |
1817 | |
1818 | /* FIXME: Check status */ |
1819 | |
1820 | dprintk(D_INT, "Recv RD %d, status 0x%02x, len %d\n", |
1821 | rd, DBRI_RD_STATUS(status), DBRI_RD_CNT(status)); |
1822 | |
1823 | /* Notify ALSA */ |
1824 | spin_unlock(&dbri->lock); |
1825 | snd_pcm_period_elapsed(info->substream); |
1826 | spin_lock(&dbri->lock); |
1827 | } |
1828 | |
1829 | static void dbri_process_one_interrupt(struct snd_dbri *dbri, int x) |
1830 | { |
1831 | int val = D_INTR_GETVAL(x); |
1832 | int channel = D_INTR_GETCHAN(x); |
1833 | int command = D_INTR_GETCMD(x); |
1834 | int code = D_INTR_GETCODE(x); |
1835 | #ifdef DBRI_DEBUG |
1836 | int rval = D_INTR_GETRVAL(x); |
1837 | #endif |
1838 | |
1839 | if (channel == D_INTR_CMD) { |
1840 | dprintk(D_CMD, "INTR: Command: %-5s Value:%d\n", |
1841 | cmds[command], val); |
1842 | } else { |
1843 | dprintk(D_INT, "INTR: Chan:%d Code:%d Val:%#x\n", |
1844 | channel, code, rval); |
1845 | } |
1846 | |
1847 | switch (code) { |
1848 | case D_INTR_CMDI: |
1849 | if (command != D_WAIT) |
1850 | printk(KERN_ERR "DBRI: Command read interrupt\n"); |
1851 | break; |
1852 | case D_INTR_BRDY: |
1853 | reception_complete_intr(dbri, channel); |
1854 | break; |
1855 | case D_INTR_XCMP: |
1856 | case D_INTR_MINT: |
1857 | transmission_complete_intr(dbri, channel); |
1858 | break; |
1859 | case D_INTR_UNDR: |
1860 | /* UNDR - Transmission underrun |
1861 | * resend SDP command with clear pipe bit (C) set |
1862 | */ |
1863 | { |
1864 | /* FIXME: do something useful in case of underrun */ |
1865 | printk(KERN_ERR "DBRI: Underrun error\n"); |
1866 | #if 0 |
1867 | s32 *cmd; |
1868 | int pipe = channel; |
1869 | int td = dbri->pipes[pipe].desc; |
1870 | |
1871 | dbri->dma->desc[td].word4 = 0; |
1872 | cmd = dbri_cmdlock(dbri, NoGetLock); |
1873 | *(cmd++) = DBRI_CMD(D_SDP, 0, |
1874 | dbri->pipes[pipe].sdp |
1875 | | D_SDP_P | D_SDP_C | D_SDP_2SAME); |
1876 | *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, td); |
1877 | dbri_cmdsend(dbri, cmd); |
1878 | #endif |
1879 | } |
1880 | break; |
1881 | case D_INTR_FXDT: |
1882 | /* FXDT - Fixed data change */ |
1883 | if (dbri->pipes[channel].sdp & D_SDP_MSB) |
1884 | val = reverse_bytes(val, dbri->pipes[channel].length); |
1885 | |
1886 | if (dbri->pipes[channel].recv_fixed_ptr) |
1887 | *(dbri->pipes[channel].recv_fixed_ptr) = val; |
1888 | break; |
1889 | default: |
1890 | if (channel != D_INTR_CMD) |
1891 | printk(KERN_WARNING |
1892 | "DBRI: Ignored Interrupt: %d (0x%x)\n", code, x); |
1893 | } |
1894 | } |
1895 | |
1896 | /* dbri_process_interrupt_buffer advances through the DBRI's interrupt |
1897 | * buffer until it finds a zero word (indicating nothing more to do |
1898 | * right now). Non-zero words require processing and are handed off |
1899 | * to dbri_process_one_interrupt AFTER advancing the pointer. |
1900 | */ |
1901 | static void dbri_process_interrupt_buffer(struct snd_dbri *dbri) |
1902 | { |
1903 | s32 x; |
1904 | |
1905 | while ((x = dbri->dma->intr[dbri->dbri_irqp]) != 0) { |
1906 | dbri->dma->intr[dbri->dbri_irqp] = 0; |
1907 | dbri->dbri_irqp++; |
1908 | if (dbri->dbri_irqp == DBRI_INT_BLK) |
1909 | dbri->dbri_irqp = 1; |
1910 | |
1911 | dbri_process_one_interrupt(dbri, x); |
1912 | } |
1913 | } |
1914 | |
1915 | static irqreturn_t snd_dbri_interrupt(int irq, void *dev_id) |
1916 | { |
1917 | struct snd_dbri *dbri = dev_id; |
1918 | static int errcnt = 0; |
1919 | int x; |
1920 | |
1921 | if (dbri == NULL) |
1922 | return IRQ_NONE; |
1923 | spin_lock(&dbri->lock); |
1924 | |
1925 | /* |
1926 | * Read it, so the interrupt goes away. |
1927 | */ |
1928 | x = sbus_readl(dbri->regs + REG1); |
1929 | |
1930 | if (x & (D_MRR | D_MLE | D_LBG | D_MBE)) { |
1931 | u32 tmp; |
1932 | |
1933 | if (x & D_MRR) |
1934 | printk(KERN_ERR |
1935 | "DBRI: Multiple Error Ack on SBus reg1=0x%x\n", |
1936 | x); |
1937 | if (x & D_MLE) |
1938 | printk(KERN_ERR |
1939 | "DBRI: Multiple Late Error on SBus reg1=0x%x\n", |
1940 | x); |
1941 | if (x & D_LBG) |
1942 | printk(KERN_ERR |
1943 | "DBRI: Lost Bus Grant on SBus reg1=0x%x\n", x); |
1944 | if (x & D_MBE) |
1945 | printk(KERN_ERR |
1946 | "DBRI: Burst Error on SBus reg1=0x%x\n", x); |
1947 | |
1948 | /* Some of these SBus errors cause the chip's SBus circuitry |
1949 | * to be disabled, so just re-enable and try to keep going. |
1950 | * |
1951 | * The only one I've seen is MRR, which will be triggered |
1952 | * if you let a transmit pipe underrun, then try to CDP it. |
1953 | * |
1954 | * If these things persist, we reset the chip. |
1955 | */ |
1956 | if ((++errcnt) % 10 == 0) { |
1957 | dprintk(D_INT, "Interrupt errors exceeded.\n"); |
1958 | dbri_reset(dbri); |
1959 | } else { |
1960 | tmp = sbus_readl(dbri->regs + REG0); |
1961 | tmp &= ~(D_D); |
1962 | sbus_writel(tmp, dbri->regs + REG0); |
1963 | } |
1964 | } |
1965 | |
1966 | dbri_process_interrupt_buffer(dbri); |
1967 | |
1968 | spin_unlock(&dbri->lock); |
1969 | |
1970 | return IRQ_HANDLED; |
1971 | } |
1972 | |
1973 | /**************************************************************************** |
1974 | PCM Interface |
1975 | ****************************************************************************/ |
1976 | static struct snd_pcm_hardware snd_dbri_pcm_hw = { |
1977 | .info = SNDRV_PCM_INFO_MMAP | |
1978 | SNDRV_PCM_INFO_INTERLEAVED | |
1979 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
1980 | SNDRV_PCM_INFO_MMAP_VALID | |
1981 | SNDRV_PCM_INFO_BATCH, |
1982 | .formats = SNDRV_PCM_FMTBIT_MU_LAW | |
1983 | SNDRV_PCM_FMTBIT_A_LAW | |
1984 | SNDRV_PCM_FMTBIT_U8 | |
1985 | SNDRV_PCM_FMTBIT_S16_BE, |
1986 | .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_5512, |
1987 | .rate_min = 5512, |
1988 | .rate_max = 48000, |
1989 | .channels_min = 1, |
1990 | .channels_max = 2, |
1991 | .buffer_bytes_max = 64 * 1024, |
1992 | .period_bytes_min = 1, |
1993 | .period_bytes_max = DBRI_TD_MAXCNT, |
1994 | .periods_min = 1, |
1995 | .periods_max = 1024, |
1996 | }; |
1997 | |
1998 | static int snd_hw_rule_format(struct snd_pcm_hw_params *params, |
1999 | struct snd_pcm_hw_rule *rule) |
2000 | { |
2001 | struct snd_interval *c = hw_param_interval(params, |
2002 | SNDRV_PCM_HW_PARAM_CHANNELS); |
2003 | struct snd_mask *f = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
2004 | struct snd_mask fmt; |
2005 | |
2006 | snd_mask_any(&fmt); |
2007 | if (c->min > 1) { |
2008 | fmt.bits[0] &= SNDRV_PCM_FMTBIT_S16_BE; |
2009 | return snd_mask_refine(f, &fmt); |
2010 | } |
2011 | return 0; |
2012 | } |
2013 | |
2014 | static int snd_hw_rule_channels(struct snd_pcm_hw_params *params, |
2015 | struct snd_pcm_hw_rule *rule) |
2016 | { |
2017 | struct snd_interval *c = hw_param_interval(params, |
2018 | SNDRV_PCM_HW_PARAM_CHANNELS); |
2019 | struct snd_mask *f = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
2020 | struct snd_interval ch; |
2021 | |
2022 | snd_interval_any(&ch); |
2023 | if (!(f->bits[0] & SNDRV_PCM_FMTBIT_S16_BE)) { |
2024 | ch.min = 1; |
2025 | ch.max = 1; |
2026 | ch.integer = 1; |
2027 | return snd_interval_refine(c, &ch); |
2028 | } |
2029 | return 0; |
2030 | } |
2031 | |
2032 | static int snd_dbri_open(struct snd_pcm_substream *substream) |
2033 | { |
2034 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2035 | struct snd_pcm_runtime *runtime = substream->runtime; |
2036 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2037 | unsigned long flags; |
2038 | |
2039 | dprintk(D_USR, "open audio output.\n"); |
2040 | runtime->hw = snd_dbri_pcm_hw; |
2041 | |
2042 | spin_lock_irqsave(&dbri->lock, flags); |
2043 | info->substream = substream; |
2044 | info->offset = 0; |
2045 | info->dvma_buffer = 0; |
2046 | info->pipe = -1; |
2047 | spin_unlock_irqrestore(&dbri->lock, flags); |
2048 | |
2049 | snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
2050 | snd_hw_rule_format, NULL, SNDRV_PCM_HW_PARAM_FORMAT, |
2051 | -1); |
2052 | snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, |
2053 | snd_hw_rule_channels, NULL, |
2054 | SNDRV_PCM_HW_PARAM_CHANNELS, |
2055 | -1); |
2056 | |
2057 | cs4215_open(dbri); |
2058 | |
2059 | return 0; |
2060 | } |
2061 | |
2062 | static int snd_dbri_close(struct snd_pcm_substream *substream) |
2063 | { |
2064 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2065 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2066 | |
2067 | dprintk(D_USR, "close audio output.\n"); |
2068 | info->substream = NULL; |
2069 | info->offset = 0; |
2070 | |
2071 | return 0; |
2072 | } |
2073 | |
2074 | static int snd_dbri_hw_params(struct snd_pcm_substream *substream, |
2075 | struct snd_pcm_hw_params *hw_params) |
2076 | { |
2077 | struct snd_pcm_runtime *runtime = substream->runtime; |
2078 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2079 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2080 | int direction; |
2081 | int ret; |
2082 | |
2083 | /* set sampling rate, audio format and number of channels */ |
2084 | ret = cs4215_prepare(dbri, params_rate(hw_params), |
2085 | params_format(hw_params), |
2086 | params_channels(hw_params)); |
2087 | if (ret != 0) |
2088 | return ret; |
2089 | |
2090 | if ((ret = snd_pcm_lib_malloc_pages(substream, |
2091 | params_buffer_bytes(hw_params))) < 0) { |
2092 | printk(KERN_ERR "malloc_pages failed with %d\n", ret); |
2093 | return ret; |
2094 | } |
2095 | |
2096 | /* hw_params can get called multiple times. Only map the DMA once. |
2097 | */ |
2098 | if (info->dvma_buffer == 0) { |
2099 | if (DBRI_STREAMNO(substream) == DBRI_PLAY) |
2100 | direction = DMA_TO_DEVICE; |
2101 | else |
2102 | direction = DMA_FROM_DEVICE; |
2103 | |
2104 | info->dvma_buffer = |
2105 | dma_map_single(&dbri->op->dev, |
2106 | runtime->dma_area, |
2107 | params_buffer_bytes(hw_params), |
2108 | direction); |
2109 | } |
2110 | |
2111 | direction = params_buffer_bytes(hw_params); |
2112 | dprintk(D_USR, "hw_params: %d bytes, dvma=%x\n", |
2113 | direction, info->dvma_buffer); |
2114 | return 0; |
2115 | } |
2116 | |
2117 | static int snd_dbri_hw_free(struct snd_pcm_substream *substream) |
2118 | { |
2119 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2120 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2121 | int direction; |
2122 | |
2123 | dprintk(D_USR, "hw_free.\n"); |
2124 | |
2125 | /* hw_free can get called multiple times. Only unmap the DMA once. |
2126 | */ |
2127 | if (info->dvma_buffer) { |
2128 | if (DBRI_STREAMNO(substream) == DBRI_PLAY) |
2129 | direction = DMA_TO_DEVICE; |
2130 | else |
2131 | direction = DMA_FROM_DEVICE; |
2132 | |
2133 | dma_unmap_single(&dbri->op->dev, info->dvma_buffer, |
2134 | substream->runtime->buffer_size, direction); |
2135 | info->dvma_buffer = 0; |
2136 | } |
2137 | if (info->pipe != -1) { |
2138 | reset_pipe(dbri, info->pipe); |
2139 | info->pipe = -1; |
2140 | } |
2141 | |
2142 | return snd_pcm_lib_free_pages(substream); |
2143 | } |
2144 | |
2145 | static int snd_dbri_prepare(struct snd_pcm_substream *substream) |
2146 | { |
2147 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2148 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2149 | int ret; |
2150 | |
2151 | info->size = snd_pcm_lib_buffer_bytes(substream); |
2152 | if (DBRI_STREAMNO(substream) == DBRI_PLAY) |
2153 | info->pipe = 4; /* Send pipe */ |
2154 | else |
2155 | info->pipe = 6; /* Receive pipe */ |
2156 | |
2157 | spin_lock_irq(&dbri->lock); |
2158 | info->offset = 0; |
2159 | |
2160 | /* Setup the all the transmit/receive descriptors to cover the |
2161 | * whole DMA buffer. |
2162 | */ |
2163 | ret = setup_descs(dbri, DBRI_STREAMNO(substream), |
2164 | snd_pcm_lib_period_bytes(substream)); |
2165 | |
2166 | spin_unlock_irq(&dbri->lock); |
2167 | |
2168 | dprintk(D_USR, "prepare audio output. %d bytes\n", info->size); |
2169 | return ret; |
2170 | } |
2171 | |
2172 | static int snd_dbri_trigger(struct snd_pcm_substream *substream, int cmd) |
2173 | { |
2174 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2175 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2176 | int ret = 0; |
2177 | |
2178 | switch (cmd) { |
2179 | case SNDRV_PCM_TRIGGER_START: |
2180 | dprintk(D_USR, "start audio, period is %d bytes\n", |
2181 | (int)snd_pcm_lib_period_bytes(substream)); |
2182 | /* Re-submit the TDs. */ |
2183 | xmit_descs(dbri); |
2184 | break; |
2185 | case SNDRV_PCM_TRIGGER_STOP: |
2186 | dprintk(D_USR, "stop audio.\n"); |
2187 | reset_pipe(dbri, info->pipe); |
2188 | break; |
2189 | default: |
2190 | ret = -EINVAL; |
2191 | } |
2192 | |
2193 | return ret; |
2194 | } |
2195 | |
2196 | static snd_pcm_uframes_t snd_dbri_pointer(struct snd_pcm_substream *substream) |
2197 | { |
2198 | struct snd_dbri *dbri = snd_pcm_substream_chip(substream); |
2199 | struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); |
2200 | snd_pcm_uframes_t ret; |
2201 | |
2202 | ret = bytes_to_frames(substream->runtime, info->offset) |
2203 | % substream->runtime->buffer_size; |
2204 | dprintk(D_USR, "I/O pointer: %ld frames of %ld.\n", |
2205 | ret, substream->runtime->buffer_size); |
2206 | return ret; |
2207 | } |
2208 | |
2209 | static struct snd_pcm_ops snd_dbri_ops = { |
2210 | .open = snd_dbri_open, |
2211 | .close = snd_dbri_close, |
2212 | .ioctl = snd_pcm_lib_ioctl, |
2213 | .hw_params = snd_dbri_hw_params, |
2214 | .hw_free = snd_dbri_hw_free, |
2215 | .prepare = snd_dbri_prepare, |
2216 | .trigger = snd_dbri_trigger, |
2217 | .pointer = snd_dbri_pointer, |
2218 | }; |
2219 | |
2220 | static int snd_dbri_pcm(struct snd_card *card) |
2221 | { |
2222 | struct snd_pcm *pcm; |
2223 | int err; |
2224 | |
2225 | if ((err = snd_pcm_new(card, |
2226 | /* ID */ "sun_dbri", |
2227 | /* device */ 0, |
2228 | /* playback count */ 1, |
2229 | /* capture count */ 1, &pcm)) < 0) |
2230 | return err; |
2231 | |
2232 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dbri_ops); |
2233 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_dbri_ops); |
2234 | |
2235 | pcm->private_data = card->private_data; |
2236 | pcm->info_flags = 0; |
2237 | strcpy(pcm->name, card->shortname); |
2238 | |
2239 | if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, |
2240 | SNDRV_DMA_TYPE_CONTINUOUS, |
2241 | snd_dma_continuous_data(GFP_KERNEL), |
2242 | 64 * 1024, 64 * 1024)) < 0) |
2243 | return err; |
2244 | |
2245 | return 0; |
2246 | } |
2247 | |
2248 | /***************************************************************************** |
2249 | Mixer interface |
2250 | *****************************************************************************/ |
2251 | |
2252 | static int snd_cs4215_info_volume(struct snd_kcontrol *kcontrol, |
2253 | struct snd_ctl_elem_info *uinfo) |
2254 | { |
2255 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
2256 | uinfo->count = 2; |
2257 | uinfo->value.integer.min = 0; |
2258 | if (kcontrol->private_value == DBRI_PLAY) |
2259 | uinfo->value.integer.max = DBRI_MAX_VOLUME; |
2260 | else |
2261 | uinfo->value.integer.max = DBRI_MAX_GAIN; |
2262 | return 0; |
2263 | } |
2264 | |
2265 | static int snd_cs4215_get_volume(struct snd_kcontrol *kcontrol, |
2266 | struct snd_ctl_elem_value *ucontrol) |
2267 | { |
2268 | struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol); |
2269 | struct dbri_streaminfo *info; |
2270 | |
2271 | if (snd_BUG_ON(!dbri)) |
2272 | return -EINVAL; |
2273 | info = &dbri->stream_info[kcontrol->private_value]; |
2274 | |
2275 | ucontrol->value.integer.value[0] = info->left_gain; |
2276 | ucontrol->value.integer.value[1] = info->right_gain; |
2277 | return 0; |
2278 | } |
2279 | |
2280 | static int snd_cs4215_put_volume(struct snd_kcontrol *kcontrol, |
2281 | struct snd_ctl_elem_value *ucontrol) |
2282 | { |
2283 | struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol); |
2284 | struct dbri_streaminfo *info = |
2285 | &dbri->stream_info[kcontrol->private_value]; |
2286 | unsigned int vol[2]; |
2287 | int changed = 0; |
2288 | |
2289 | vol[0] = ucontrol->value.integer.value[0]; |
2290 | vol[1] = ucontrol->value.integer.value[1]; |
2291 | if (kcontrol->private_value == DBRI_PLAY) { |
2292 | if (vol[0] > DBRI_MAX_VOLUME || vol[1] > DBRI_MAX_VOLUME) |
2293 | return -EINVAL; |
2294 | } else { |
2295 | if (vol[0] > DBRI_MAX_GAIN || vol[1] > DBRI_MAX_GAIN) |
2296 | return -EINVAL; |
2297 | } |
2298 | |
2299 | if (info->left_gain != vol[0]) { |
2300 | info->left_gain = vol[0]; |
2301 | changed = 1; |
2302 | } |
2303 | if (info->right_gain != vol[1]) { |
2304 | info->right_gain = vol[1]; |
2305 | changed = 1; |
2306 | } |
2307 | if (changed) { |
2308 | /* First mute outputs, and wait 1/8000 sec (125 us) |
2309 | * to make sure this takes. This avoids clicking noises. |
2310 | */ |
2311 | cs4215_setdata(dbri, 1); |
2312 | udelay(125); |
2313 | cs4215_setdata(dbri, 0); |
2314 | } |
2315 | return changed; |
2316 | } |
2317 | |
2318 | static int snd_cs4215_info_single(struct snd_kcontrol *kcontrol, |
2319 | struct snd_ctl_elem_info *uinfo) |
2320 | { |
2321 | int mask = (kcontrol->private_value >> 16) & 0xff; |
2322 | |
2323 | uinfo->type = (mask == 1) ? |
2324 | SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER; |
2325 | uinfo->count = 1; |
2326 | uinfo->value.integer.min = 0; |
2327 | uinfo->value.integer.max = mask; |
2328 | return 0; |
2329 | } |
2330 | |
2331 | static int snd_cs4215_get_single(struct snd_kcontrol *kcontrol, |
2332 | struct snd_ctl_elem_value *ucontrol) |
2333 | { |
2334 | struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol); |
2335 | int elem = kcontrol->private_value & 0xff; |
2336 | int shift = (kcontrol->private_value >> 8) & 0xff; |
2337 | int mask = (kcontrol->private_value >> 16) & 0xff; |
2338 | int invert = (kcontrol->private_value >> 24) & 1; |
2339 | |
2340 | if (snd_BUG_ON(!dbri)) |
2341 | return -EINVAL; |
2342 | |
2343 | if (elem < 4) |
2344 | ucontrol->value.integer.value[0] = |
2345 | (dbri->mm.data[elem] >> shift) & mask; |
2346 | else |
2347 | ucontrol->value.integer.value[0] = |
2348 | (dbri->mm.ctrl[elem - 4] >> shift) & mask; |
2349 | |
2350 | if (invert == 1) |
2351 | ucontrol->value.integer.value[0] = |
2352 | mask - ucontrol->value.integer.value[0]; |
2353 | return 0; |
2354 | } |
2355 | |
2356 | static int snd_cs4215_put_single(struct snd_kcontrol *kcontrol, |
2357 | struct snd_ctl_elem_value *ucontrol) |
2358 | { |
2359 | struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol); |
2360 | int elem = kcontrol->private_value & 0xff; |
2361 | int shift = (kcontrol->private_value >> 8) & 0xff; |
2362 | int mask = (kcontrol->private_value >> 16) & 0xff; |
2363 | int invert = (kcontrol->private_value >> 24) & 1; |
2364 | int changed = 0; |
2365 | unsigned short val; |
2366 | |
2367 | if (snd_BUG_ON(!dbri)) |
2368 | return -EINVAL; |
2369 | |
2370 | val = (ucontrol->value.integer.value[0] & mask); |
2371 | if (invert == 1) |
2372 | val = mask - val; |
2373 | val <<= shift; |
2374 | |
2375 | if (elem < 4) { |
2376 | dbri->mm.data[elem] = (dbri->mm.data[elem] & |
2377 | ~(mask << shift)) | val; |
2378 | changed = (val != dbri->mm.data[elem]); |
2379 | } else { |
2380 | dbri->mm.ctrl[elem - 4] = (dbri->mm.ctrl[elem - 4] & |
2381 | ~(mask << shift)) | val; |
2382 | changed = (val != dbri->mm.ctrl[elem - 4]); |
2383 | } |
2384 | |
2385 | dprintk(D_GEN, "put_single: mask=0x%x, changed=%d, " |
2386 | "mixer-value=%ld, mm-value=0x%x\n", |
2387 | mask, changed, ucontrol->value.integer.value[0], |
2388 | dbri->mm.data[elem & 3]); |
2389 | |
2390 | if (changed) { |
2391 | /* First mute outputs, and wait 1/8000 sec (125 us) |
2392 | * to make sure this takes. This avoids clicking noises. |
2393 | */ |
2394 | cs4215_setdata(dbri, 1); |
2395 | udelay(125); |
2396 | cs4215_setdata(dbri, 0); |
2397 | } |
2398 | return changed; |
2399 | } |
2400 | |
2401 | /* Entries 0-3 map to the 4 data timeslots, entries 4-7 map to the 4 control |
2402 | timeslots. Shift is the bit offset in the timeslot, mask defines the |
2403 | number of bits. invert is a boolean for use with attenuation. |
2404 | */ |
2405 | #define CS4215_SINGLE(xname, entry, shift, mask, invert) \ |
2406 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \ |
2407 | .info = snd_cs4215_info_single, \ |
2408 | .get = snd_cs4215_get_single, .put = snd_cs4215_put_single, \ |
2409 | .private_value = (entry) | ((shift) << 8) | ((mask) << 16) | \ |
2410 | ((invert) << 24) }, |
2411 | |
2412 | static struct snd_kcontrol_new dbri_controls[] = { |
2413 | { |
2414 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
2415 | .name = "Playback Volume", |
2416 | .info = snd_cs4215_info_volume, |
2417 | .get = snd_cs4215_get_volume, |
2418 | .put = snd_cs4215_put_volume, |
2419 | .private_value = DBRI_PLAY, |
2420 | }, |
2421 | CS4215_SINGLE("Headphone switch", 0, 7, 1, 0) |
2422 | CS4215_SINGLE("Line out switch", 0, 6, 1, 0) |
2423 | CS4215_SINGLE("Speaker switch", 1, 6, 1, 0) |
2424 | { |
2425 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
2426 | .name = "Capture Volume", |
2427 | .info = snd_cs4215_info_volume, |
2428 | .get = snd_cs4215_get_volume, |
2429 | .put = snd_cs4215_put_volume, |
2430 | .private_value = DBRI_REC, |
2431 | }, |
2432 | /* FIXME: mic/line switch */ |
2433 | CS4215_SINGLE("Line in switch", 2, 4, 1, 0) |
2434 | CS4215_SINGLE("High Pass Filter switch", 5, 7, 1, 0) |
2435 | CS4215_SINGLE("Monitor Volume", 3, 4, 0xf, 1) |
2436 | CS4215_SINGLE("Mic boost", 4, 4, 1, 1) |
2437 | }; |
2438 | |
2439 | static int snd_dbri_mixer(struct snd_card *card) |
2440 | { |
2441 | int idx, err; |
2442 | struct snd_dbri *dbri; |
2443 | |
2444 | if (snd_BUG_ON(!card || !card->private_data)) |
2445 | return -EINVAL; |
2446 | dbri = card->private_data; |
2447 | |
2448 | strcpy(card->mixername, card->shortname); |
2449 | |
2450 | for (idx = 0; idx < ARRAY_SIZE(dbri_controls); idx++) { |
2451 | err = snd_ctl_add(card, |
2452 | snd_ctl_new1(&dbri_controls[idx], dbri)); |
2453 | if (err < 0) |
2454 | return err; |
2455 | } |
2456 | |
2457 | for (idx = DBRI_REC; idx < DBRI_NO_STREAMS; idx++) { |
2458 | dbri->stream_info[idx].left_gain = 0; |
2459 | dbri->stream_info[idx].right_gain = 0; |
2460 | } |
2461 | |
2462 | return 0; |
2463 | } |
2464 | |
2465 | /**************************************************************************** |
2466 | /proc interface |
2467 | ****************************************************************************/ |
2468 | static void dbri_regs_read(struct snd_info_entry *entry, |
2469 | struct snd_info_buffer *buffer) |
2470 | { |
2471 | struct snd_dbri *dbri = entry->private_data; |
2472 | |
2473 | snd_iprintf(buffer, "REG0: 0x%x\n", sbus_readl(dbri->regs + REG0)); |
2474 | snd_iprintf(buffer, "REG2: 0x%x\n", sbus_readl(dbri->regs + REG2)); |
2475 | snd_iprintf(buffer, "REG8: 0x%x\n", sbus_readl(dbri->regs + REG8)); |
2476 | snd_iprintf(buffer, "REG9: 0x%x\n", sbus_readl(dbri->regs + REG9)); |
2477 | } |
2478 | |
2479 | #ifdef DBRI_DEBUG |
2480 | static void dbri_debug_read(struct snd_info_entry *entry, |
2481 | struct snd_info_buffer *buffer) |
2482 | { |
2483 | struct snd_dbri *dbri = entry->private_data; |
2484 | int pipe; |
2485 | snd_iprintf(buffer, "debug=%d\n", dbri_debug); |
2486 | |
2487 | for (pipe = 0; pipe < 32; pipe++) { |
2488 | if (pipe_active(dbri, pipe)) { |
2489 | struct dbri_pipe *pptr = &dbri->pipes[pipe]; |
2490 | snd_iprintf(buffer, |
2491 | "Pipe %d: %s SDP=0x%x desc=%d, " |
2492 | "len=%d next %d\n", |
2493 | pipe, |
2494 | (pptr->sdp & D_SDP_TO_SER) ? "output" : |
2495 | "input", |
2496 | pptr->sdp, pptr->desc, |
2497 | pptr->length, pptr->nextpipe); |
2498 | } |
2499 | } |
2500 | } |
2501 | #endif |
2502 | |
2503 | static void snd_dbri_proc(struct snd_card *card) |
2504 | { |
2505 | struct snd_dbri *dbri = card->private_data; |
2506 | struct snd_info_entry *entry; |
2507 | |
2508 | if (!snd_card_proc_new(card, "regs", &entry)) |
2509 | snd_info_set_text_ops(entry, dbri, dbri_regs_read); |
2510 | |
2511 | #ifdef DBRI_DEBUG |
2512 | if (!snd_card_proc_new(card, "debug", &entry)) { |
2513 | snd_info_set_text_ops(entry, dbri, dbri_debug_read); |
2514 | entry->mode = S_IFREG | S_IRUGO; /* Readable only. */ |
2515 | } |
2516 | #endif |
2517 | } |
2518 | |
2519 | /* |
2520 | **************************************************************************** |
2521 | **************************** Initialization ******************************** |
2522 | **************************************************************************** |
2523 | */ |
2524 | static void snd_dbri_free(struct snd_dbri *dbri); |
2525 | |
2526 | static int snd_dbri_create(struct snd_card *card, |
2527 | struct platform_device *op, |
2528 | int irq, int dev) |
2529 | { |
2530 | struct snd_dbri *dbri = card->private_data; |
2531 | int err; |
2532 | |
2533 | spin_lock_init(&dbri->lock); |
2534 | dbri->op = op; |
2535 | dbri->irq = irq; |
2536 | |
2537 | dbri->dma = dma_alloc_coherent(&op->dev, |
2538 | sizeof(struct dbri_dma), |
2539 | &dbri->dma_dvma, GFP_ATOMIC); |
2540 | if (!dbri->dma) |
2541 | return -ENOMEM; |
2542 | memset((void *)dbri->dma, 0, sizeof(struct dbri_dma)); |
2543 | |
2544 | dprintk(D_GEN, "DMA Cmd Block 0x%p (0x%08x)\n", |
2545 | dbri->dma, dbri->dma_dvma); |
2546 | |
2547 | /* Map the registers into memory. */ |
2548 | dbri->regs_size = resource_size(&op->resource[0]); |
2549 | dbri->regs = of_ioremap(&op->resource[0], 0, |
2550 | dbri->regs_size, "DBRI Registers"); |
2551 | if (!dbri->regs) { |
2552 | printk(KERN_ERR "DBRI: could not allocate registers\n"); |
2553 | dma_free_coherent(&op->dev, sizeof(struct dbri_dma), |
2554 | (void *)dbri->dma, dbri->dma_dvma); |
2555 | return -EIO; |
2556 | } |
2557 | |
2558 | err = request_irq(dbri->irq, snd_dbri_interrupt, IRQF_SHARED, |
2559 | "DBRI audio", dbri); |
2560 | if (err) { |
2561 | printk(KERN_ERR "DBRI: Can't get irq %d\n", dbri->irq); |
2562 | of_iounmap(&op->resource[0], dbri->regs, dbri->regs_size); |
2563 | dma_free_coherent(&op->dev, sizeof(struct dbri_dma), |
2564 | (void *)dbri->dma, dbri->dma_dvma); |
2565 | return err; |
2566 | } |
2567 | |
2568 | /* Do low level initialization of the DBRI and CS4215 chips */ |
2569 | dbri_initialize(dbri); |
2570 | err = cs4215_init(dbri); |
2571 | if (err) { |
2572 | snd_dbri_free(dbri); |
2573 | return err; |
2574 | } |
2575 | |
2576 | return 0; |
2577 | } |
2578 | |
2579 | static void snd_dbri_free(struct snd_dbri *dbri) |
2580 | { |
2581 | dprintk(D_GEN, "snd_dbri_free\n"); |
2582 | dbri_reset(dbri); |
2583 | |
2584 | if (dbri->irq) |
2585 | free_irq(dbri->irq, dbri); |
2586 | |
2587 | if (dbri->regs) |
2588 | of_iounmap(&dbri->op->resource[0], dbri->regs, dbri->regs_size); |
2589 | |
2590 | if (dbri->dma) |
2591 | dma_free_coherent(&dbri->op->dev, |
2592 | sizeof(struct dbri_dma), |
2593 | (void *)dbri->dma, dbri->dma_dvma); |
2594 | } |
2595 | |
2596 | static int dbri_probe(struct platform_device *op) |
2597 | { |
2598 | struct snd_dbri *dbri; |
2599 | struct resource *rp; |
2600 | struct snd_card *card; |
2601 | static int dev = 0; |
2602 | int irq; |
2603 | int err; |
2604 | |
2605 | if (dev >= SNDRV_CARDS) |
2606 | return -ENODEV; |
2607 | if (!enable[dev]) { |
2608 | dev++; |
2609 | return -ENOENT; |
2610 | } |
2611 | |
2612 | irq = op->archdata.irqs[0]; |
2613 | if (irq <= 0) { |
2614 | printk(KERN_ERR "DBRI-%d: No IRQ.\n", dev); |
2615 | return -ENODEV; |
2616 | } |
2617 | |
2618 | err = snd_card_create(index[dev], id[dev], THIS_MODULE, |
2619 | sizeof(struct snd_dbri), &card); |
2620 | if (err < 0) |
2621 | return err; |
2622 | |
2623 | strcpy(card->driver, "DBRI"); |
2624 | strcpy(card->shortname, "Sun DBRI"); |
2625 | rp = &op->resource[0]; |
2626 | sprintf(card->longname, "%s at 0x%02lx:0x%016Lx, irq %d", |
2627 | card->shortname, |
2628 | rp->flags & 0xffL, (unsigned long long)rp->start, irq); |
2629 | |
2630 | err = snd_dbri_create(card, op, irq, dev); |
2631 | if (err < 0) { |
2632 | snd_card_free(card); |
2633 | return err; |
2634 | } |
2635 | |
2636 | dbri = card->private_data; |
2637 | err = snd_dbri_pcm(card); |
2638 | if (err < 0) |
2639 | goto _err; |
2640 | |
2641 | err = snd_dbri_mixer(card); |
2642 | if (err < 0) |
2643 | goto _err; |
2644 | |
2645 | /* /proc file handling */ |
2646 | snd_dbri_proc(card); |
2647 | dev_set_drvdata(&op->dev, card); |
2648 | |
2649 | err = snd_card_register(card); |
2650 | if (err < 0) |
2651 | goto _err; |
2652 | |
2653 | printk(KERN_INFO "audio%d at %p (irq %d) is DBRI(%c)+CS4215(%d)\n", |
2654 | dev, dbri->regs, |
2655 | dbri->irq, op->dev.of_node->name[9], dbri->mm.version); |
2656 | dev++; |
2657 | |
2658 | return 0; |
2659 | |
2660 | _err: |
2661 | snd_dbri_free(dbri); |
2662 | snd_card_free(card); |
2663 | return err; |
2664 | } |
2665 | |
2666 | static int dbri_remove(struct platform_device *op) |
2667 | { |
2668 | struct snd_card *card = dev_get_drvdata(&op->dev); |
2669 | |
2670 | snd_dbri_free(card->private_data); |
2671 | snd_card_free(card); |
2672 | |
2673 | return 0; |
2674 | } |
2675 | |
2676 | static const struct of_device_id dbri_match[] = { |
2677 | { |
2678 | .name = "SUNW,DBRIe", |
2679 | }, |
2680 | { |
2681 | .name = "SUNW,DBRIf", |
2682 | }, |
2683 | {}, |
2684 | }; |
2685 | |
2686 | MODULE_DEVICE_TABLE(of, dbri_match); |
2687 | |
2688 | static struct platform_driver dbri_sbus_driver = { |
2689 | .driver = { |
2690 | .name = "dbri", |
2691 | .owner = THIS_MODULE, |
2692 | .of_match_table = dbri_match, |
2693 | }, |
2694 | .probe = dbri_probe, |
2695 | .remove = dbri_remove, |
2696 | }; |
2697 | |
2698 | module_platform_driver(dbri_sbus_driver); |
2699 |
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v2.6.34-rc5
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