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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / oss / ite8172.c
blob00ac1c95a4290b0e20ac19cb779f4166ce0930b9
1 /*
2 * ite8172.c -- ITE IT8172G Sound Driver.
3 *
4 * Copyright 2001 MontaVista Software Inc.
5 * Author: MontaVista Software, Inc.
6 * stevel@mvista.com or source@mvista.com
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 *
29 * Module command line parameters:
30 *
31 * Supported devices:
32 * /dev/dsp standard OSS /dev/dsp device
33 * /dev/mixer standard OSS /dev/mixer device
34 *
35 * Notes:
36 *
37 * 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are
38 * taken, slightly modified or not at all, from the ES1371 driver,
39 * so refer to the credits in es1371.c for those. The rest of the
40 * code (probe, open, read, write, the ISR, etc.) is new.
41 * 2. The following support is untested:
42 * * Memory mapping the audio buffers, and the ioctl controls that go
43 * with it.
44 * * S/PDIF output.
45 * * I2S support.
46 * 3. The following is not supported:
47 * * legacy audio mode.
48 * 4. Support for volume button interrupts is implemented but doesn't
49 * work yet.
50 *
51 * Revision history
52 * 02.08.2001 Initial release
53 * 06.22.2001 Added I2S support
54 * 07.30.2003 Removed initialisation to zero for static variables
55 * (spdif[NR_DEVICE], i2s_fmt[NR_DEVICE], and devindex)
56 */
57 #include <linux/module.h>
58 #include <linux/string.h>
59 #include <linux/ioport.h>
60 #include <linux/sched.h>
61 #include <linux/delay.h>
62 #include <linux/sound.h>
63 #include <linux/slab.h>
64 #include <linux/soundcard.h>
65 #include <linux/pci.h>
66 #include <linux/init.h>
67 #include <linux/poll.h>
68 #include <linux/bitops.h>
69 #include <linux/proc_fs.h>
70 #include <linux/spinlock.h>
71 #include <linux/smp_lock.h>
72 #include <linux/ac97_codec.h>
73 #include <linux/interrupt.h>
74 #include <linux/mutex.h>
75
76 #include <asm/io.h>
77 #include <asm/dma.h>
78 #include <asm/uaccess.h>
79 #include <asm/it8172/it8172.h>
80
81 /* --------------------------------------------------------------------- */
82
83 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
84 #define IT8172_DEBUG
85 #undef IT8172_VERBOSE_DEBUG
86 #define DBG(x) {}
87
88 #define IT8172_MODULE_NAME "IT8172 audio"
89 #define PFX IT8172_MODULE_NAME
90
91 #ifdef IT8172_DEBUG
92 #define dbg(format, arg...) printk(KERN_DEBUG PFX ": " format "\n" , ## arg)
93 #else
94 #define dbg(format, arg...) do {} while (0)
95 #endif
96 #define err(format, arg...) printk(KERN_ERR PFX ": " format "\n" , ## arg)
97 #define info(format, arg...) printk(KERN_INFO PFX ": " format "\n" , ## arg)
98 #define warn(format, arg...) printk(KERN_WARNING PFX ": " format "\n" , ## arg)
99
100
101 #define IT8172_MODULE_NAME "IT8172 audio"
102 #define PFX IT8172_MODULE_NAME
103
104 #ifdef IT8172_DEBUG
105 #define dbg(format, arg...) printk(KERN_DEBUG PFX ": " format "\n" , ## arg)
106 #else
107 #define dbg(format, arg...) do {} while (0)
108 #endif
109 #define err(format, arg...) printk(KERN_ERR PFX ": " format "\n" , ## arg)
110 #define info(format, arg...) printk(KERN_INFO PFX ": " format "\n" , ## arg)
111 #define warn(format, arg...) printk(KERN_WARNING PFX ": " format "\n" , ## arg)
112
113
114 static const unsigned sample_shift[] = { 0, 1, 1, 2 };
115
116
117 /*
118 * Audio Controller register bit definitions follow. See
119 * include/asm/it8172/it8172.h for register offsets.
120 */
121
122 /* PCM Out Volume Reg */
123 #define PCMOV_PCMOM (1<<15) /* PCM Out Mute default 1: mute */
124 #define PCMOV_PCMRCG_BIT 8 /* PCM Right channel Gain */
125 #define PCMOV_PCMRCG_MASK (0x1f<<PCMOV_PCMRCG_BIT)
126 #define PCMOV_PCMLCG_BIT 0 /* PCM Left channel gain */
127 #define PCMOV_PCMLCG_MASK 0x1f
128
129 /* FM Out Volume Reg */
130 #define FMOV_FMOM (1<<15) /* FM Out Mute default 1: mute */
131 #define FMOV_FMRCG_BIT 8 /* FM Right channel Gain */
132 #define FMOV_FMRCG_MASK (0x1f<<FMOV_FMRCG_BIT)
133 #define FMOV_FMLCG_BIT 0 /* FM Left channel gain */
134 #define FMOV_FMLCG_MASK 0x1f
135
136 /* I2S Out Volume Reg */
137 #define I2SV_I2SOM (1<<15) /* I2S Out Mute default 1: mute */
138 #define I2SV_I2SRCG_BIT 8 /* I2S Right channel Gain */
139 #define I2SV_I2SRCG_MASK (0x1f<<I2SV_I2SRCG_BIT)
140 #define I2SV_I2SLCG_BIT 0 /* I2S Left channel gain */
141 #define I2SV_I2SLCG_MASK 0x1f
142
143 /* Digital Recording Source Select Reg */
144 #define DRSS_BIT 0
145 #define DRSS_MASK 0x07
146 #define DRSS_AC97_PRIM 0
147 #define DRSS_FM 1
148 #define DRSS_I2S 2
149 #define DRSS_PCM 3
150 #define DRSS_AC97_SEC 4
151
152 /* Playback/Capture Channel Control Registers */
153 #define CC_SM (1<<15) /* Stereo, Mone 0: mono 1: stereo */
154 #define CC_DF (1<<14) /* Data Format 0: 8 bit 1: 16 bit */
155 #define CC_FMT_BIT 14
156 #define CC_FMT_MASK (0x03<<CC_FMT_BIT)
157 #define CC_CF_BIT 12 /* Channel format (Playback only) */
158 #define CC_CF_MASK (0x03<<CC_CF_BIT)
159 #define CC_CF_2 0
160 #define CC_CF_4 (1<<CC_CF_BIT)
161 #define CC_CF_6 (2<<CC_CF_BIT)
162 #define CC_SR_BIT 8 /* sample Rate */
163 #define CC_SR_MASK (0x0f<<CC_SR_BIT)
164 #define CC_SR_5500 0
165 #define CC_SR_8000 (1<<CC_SR_BIT)
166 #define CC_SR_9600 (2<<CC_SR_BIT)
167 #define CC_SR_11025 (3<<CC_SR_BIT)
168 #define CC_SR_16000 (4<<CC_SR_BIT)
169 #define CC_SR_19200 (5<<CC_SR_BIT)
170 #define CC_SR_22050 (6<<CC_SR_BIT)
171 #define CC_SR_32000 (7<<CC_SR_BIT)
172 #define CC_SR_38400 (8<<CC_SR_BIT)
173 #define CC_SR_44100 (9<<CC_SR_BIT)
174 #define CC_SR_48000 (10<<CC_SR_BIT)
175 #define CC_CSP (1<<7) /* Channel stop
176 * 0: End of Current buffer
177 * 1: Immediately stop when rec stop */
178 #define CC_CP (1<<6) /* Channel pause 0: normal, 1: pause */
179 #define CC_CA (1<<5) /* Channel Action 0: Stop , 1: start */
180 #define CC_CB2L (1<<2) /* Cur. buf. 2 xfr is last 0: No, 1: Yes */
181 #define CC_CB1L (1<<1) /* Cur. buf. 1 xfr is last 0: No, 1: Yes */
182 #define CC_DE 1 /* DFC/DFIFO Data Empty 1: empty, 0: not empty
183 * (Playback only)
184 */
185
186 /* Codec Control Reg */
187 #define CODECC_GME (1<<9) /* AC97 GPIO Mode enable */
188 #define CODECC_ATM (1<<8) /* AC97 ATE test mode 0: test 1: normal */
189 #define CODECC_WR (1<<6) /* AC97 Warn reset 1: warm reset , 0: Normal */
190 #define CODECC_CR (1<<5) /* AC97 Cold reset 1: Cold reset , 0: Normal */
191
192
193 /* I2S Control Reg */
194 #define I2SMC_SR_BIT 6 /* I2S Sampling rate
195 * 00: 48KHz, 01: 44.1 KHz, 10: 32 32 KHz */
196 #define I2SMC_SR_MASK (0x03<<I2SMC_SR_BIT)
197 #define I2SMC_SR_48000 0
198 #define I2SMC_SR_44100 (1<<I2SMC_SR_BIT)
199 #define I2SMC_SR_32000 (2<<I2SMC_SR_BIT)
200 #define I2SMC_SRSS (1<<5) /* Sample Rate Source Select 1:S/W, 0: H/W */
201 #define I2SMC_I2SF_BIT 0 /* I2S Format */
202 #define I2SMC_I2SF_MASK 0x03
203 #define I2SMC_I2SF_DAC 0
204 #define I2SMC_I2SF_ADC 2
205 #define I2SMC_I2SF_I2S 3
206
207
208 /* Volume up, Down, Mute */
209 #define VS_VMP (1<<2) /* Volume mute 1: pushed, 0: not */
210 #define VS_VDP (1<<1) /* Volume Down 1: pushed, 0: not */
211 #define VS_VUP 1 /* Volime Up 1: pushed, 0: not */
212
213 /* SRC, Mixer test control/DFC status reg */
214 #define SRCS_DPUSC (1<<5) /* DFC Playback underrun Status/clear */
215 #define SRCS_DCOSC (1<<4) /* DFC Capture Overrun Status/clear */
216 #define SRCS_SIS (1<<3) /* SRC input select 1: Mixer, 0: Codec I/F */
217 #define SRCS_CDIS_BIT 0 /* Codec Data Input Select */
218 #define SRCS_CDIS_MASK 0x07
219 #define SRCS_CDIS_MIXER 0
220 #define SRCS_CDIS_PCM 1
221 #define SRCS_CDIS_I2S 2
222 #define SRCS_CDIS_FM 3
223 #define SRCS_CDIS_DFC 4
224
225
226 /* Codec Index Reg command Port */
227 #define CIRCP_CID_BIT 10
228 #define CIRCP_CID_MASK (0x03<<CIRCP_CID_BIT)
229 #define CIRCP_CPS (1<<9) /* Command Port Status 0: ready, 1: busy */
230 #define CIRCP_DPVF (1<<8) /* Data Port Valid Flag 0: invalis, 1: valid */
231 #define CIRCP_RWC (1<<7) /* Read/write command */
232 #define CIRCP_CIA_BIT 0
233 #define CIRCP_CIA_MASK 0x007F /* Codec Index Address */
234
235 /* Test Mode Control/Test group Select Control */
236
237 /* General Control Reg */
238 #define GC_VDC_BIT 6 /* Volume Division Control */
239 #define GC_VDC_MASK (0x03<<GC_VDC_BIT)
240 #define GC_VDC_NONE 0
241 #define GC_VDC_DIV2 (1<<GC_VDC_BIT)
242 #define GC_VDC_DIV4 (2<<GC_VDC_BIT)
243 #define GC_SOE (1<<2) /* S/PDIF Output enable */
244 #define GC_SWR 1 /* Software warn reset */
245
246 /* Interrupt mask Control Reg */
247 #define IMC_VCIM (1<<6) /* Volume CNTL interrupt mask */
248 #define IMC_CCIM (1<<1) /* Capture Chan. iterrupt mask */
249 #define IMC_PCIM 1 /* Playback Chan. interrupt mask */
250
251 /* Interrupt status/clear reg */
252 #define ISC_VCI (1<<6) /* Volume CNTL interrupt 1: clears */
253 #define ISC_CCI (1<<1) /* Capture Chan. interrupt 1: clears */
254 #define ISC_PCI 1 /* Playback Chan. interrupt 1: clears */
255
256 /* misc stuff */
257 #define POLL_COUNT 0x5000
258
259
260 /* --------------------------------------------------------------------- */
261
262 /*
263 * Define DIGITAL1 as the I2S channel, since it is not listed in
264 * soundcard.h.
265 */
266 #define SOUND_MIXER_I2S SOUND_MIXER_DIGITAL1
267 #define SOUND_MASK_I2S SOUND_MASK_DIGITAL1
268 #define SOUND_MIXER_READ_I2S MIXER_READ(SOUND_MIXER_I2S)
269 #define SOUND_MIXER_WRITE_I2S MIXER_WRITE(SOUND_MIXER_I2S)
270
271 /* --------------------------------------------------------------------- */
272
273 struct it8172_state {
274 /* list of it8172 devices */
275 struct list_head devs;
276
277 /* the corresponding pci_dev structure */
278 struct pci_dev *dev;
279
280 /* soundcore stuff */
281 int dev_audio;
282
283 /* hardware resources */
284 unsigned long io;
285 unsigned int irq;
286
287 /* PCI ID's */
288 u16 vendor;
289 u16 device;
290 u8 rev; /* the chip revision */
291
292 /* options */
293 int spdif_volume; /* S/PDIF output is enabled if != -1 */
294 int i2s_volume; /* current I2S out volume, in OSS format */
295 int i2s_recording;/* 1 = recording from I2S, 0 = not */
296
297 #ifdef IT8172_DEBUG
298 /* debug /proc entry */
299 struct proc_dir_entry *ps;
300 struct proc_dir_entry *ac97_ps;
301 #endif /* IT8172_DEBUG */
302
303 struct ac97_codec codec;
304
305 unsigned short pcc, capcc;
306 unsigned dacrate, adcrate;
307
308 spinlock_t lock;
309 struct mutex open_mutex;
310 mode_t open_mode;
311 wait_queue_head_t open_wait;
312
313 struct dmabuf {
314 void *rawbuf;
315 dma_addr_t dmaaddr;
316 unsigned buforder;
317 unsigned numfrag;
318 unsigned fragshift;
319 void* nextIn;
320 void* nextOut;
321 int count;
322 int curBufPtr;
323 unsigned total_bytes;
324 unsigned error; /* over/underrun */
325 wait_queue_head_t wait;
326 /* redundant, but makes calculations easier */
327 unsigned fragsize;
328 unsigned dmasize;
329 unsigned fragsamples;
330 /* OSS stuff */
331 unsigned mapped:1;
332 unsigned ready:1;
333 unsigned stopped:1;
334 unsigned ossfragshift;
335 int ossmaxfrags;
336 unsigned subdivision;
337 } dma_dac, dma_adc;
338 };
339
340 /* --------------------------------------------------------------------- */
341
342 static LIST_HEAD(devs);
343
344 /* --------------------------------------------------------------------- */
345
346 static inline unsigned ld2(unsigned int x)
347 {
348 unsigned r = 0;
349
350 if (x >= 0x10000) {
351 x >>= 16;
352 r += 16;
353 }
354 if (x >= 0x100) {
355 x >>= 8;
356 r += 8;
357 }
358 if (x >= 0x10) {
359 x >>= 4;
360 r += 4;
361 }
362 if (x >= 4) {
363 x >>= 2;
364 r += 2;
365 }
366 if (x >= 2)
367 r++;
368 return r;
369 }
370
371 /* --------------------------------------------------------------------- */
372
373 static void it8172_delay(int msec)
374 {
375 unsigned long tmo;
376 signed long tmo2;
377
378 if (in_interrupt())
379 return;
380
381 tmo = jiffies + (msec*HZ)/1000;
382 for (;;) {
383 tmo2 = tmo - jiffies;
384 if (tmo2 <= 0)
385 break;
386 schedule_timeout(tmo2);
387 }
388 }
389
390
391 static unsigned short
392 get_compat_rate(unsigned* rate)
393 {
394 unsigned rate_out = *rate;
395 unsigned short sr;
396
397 if (rate_out >= 46050) {
398 sr = CC_SR_48000; rate_out = 48000;
399 } else if (rate_out >= 41250) {
400 sr = CC_SR_44100; rate_out = 44100;
401 } else if (rate_out >= 35200) {
402 sr = CC_SR_38400; rate_out = 38400;
403 } else if (rate_out >= 27025) {
404 sr = CC_SR_32000; rate_out = 32000;
405 } else if (rate_out >= 20625) {
406 sr = CC_SR_22050; rate_out = 22050;
407 } else if (rate_out >= 17600) {
408 sr = CC_SR_19200; rate_out = 19200;
409 } else if (rate_out >= 13513) {
410 sr = CC_SR_16000; rate_out = 16000;
411 } else if (rate_out >= 10313) {
412 sr = CC_SR_11025; rate_out = 11025;
413 } else if (rate_out >= 8800) {
414 sr = CC_SR_9600; rate_out = 9600;
415 } else if (rate_out >= 6750) {
416 sr = CC_SR_8000; rate_out = 8000;
417 } else {
418 sr = CC_SR_5500; rate_out = 5500;
419 }
420
421 *rate = rate_out;
422 return sr;
423 }
424
425 static void set_adc_rate(struct it8172_state *s, unsigned rate)
426 {
427 unsigned long flags;
428 unsigned short sr;
429
430 sr = get_compat_rate(&rate);
431
432 spin_lock_irqsave(&s->lock, flags);
433 s->capcc &= ~CC_SR_MASK;
434 s->capcc |= sr;
435 outw(s->capcc, s->io+IT_AC_CAPCC);
436 spin_unlock_irqrestore(&s->lock, flags);
437
438 s->adcrate = rate;
439 }
440
441
442 static void set_dac_rate(struct it8172_state *s, unsigned rate)
443 {
444 unsigned long flags;
445 unsigned short sr;
446
447 sr = get_compat_rate(&rate);
448
449 spin_lock_irqsave(&s->lock, flags);
450 s->pcc &= ~CC_SR_MASK;
451 s->pcc |= sr;
452 outw(s->pcc, s->io+IT_AC_PCC);
453 spin_unlock_irqrestore(&s->lock, flags);
454
455 s->dacrate = rate;
456 }
457
458
459 /* --------------------------------------------------------------------- */
460
461 static u16 rdcodec(struct ac97_codec *codec, u8 addr)
462 {
463 struct it8172_state *s = (struct it8172_state *)codec->private_data;
464 unsigned long flags;
465 unsigned short circp, data;
466 int i;
467
468 spin_lock_irqsave(&s->lock, flags);
469
470 for (i = 0; i < POLL_COUNT; i++)
471 if (!(inw(s->io+IT_AC_CIRCP) & CIRCP_CPS))
472 break;
473 if (i == POLL_COUNT)
474 err("rdcodec: codec ready poll expired!");
475
476 circp = addr & CIRCP_CIA_MASK;
477 circp |= (codec->id << CIRCP_CID_BIT);
478 circp |= CIRCP_RWC; // read command
479 outw(circp, s->io+IT_AC_CIRCP);
480
481 /* now wait for the data */
482 for (i = 0; i < POLL_COUNT; i++)
483 if (inw(s->io+IT_AC_CIRCP) & CIRCP_DPVF)
484 break;
485 if (i == POLL_COUNT)
486 err("rdcodec: read poll expired!");
487
488 data = inw(s->io+IT_AC_CIRDP);
489 spin_unlock_irqrestore(&s->lock, flags);
490
491 return data;
492 }
493
494
495 static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
496 {
497 struct it8172_state *s = (struct it8172_state *)codec->private_data;
498 unsigned long flags;
499 unsigned short circp;
500 int i;
501
502 spin_lock_irqsave(&s->lock, flags);
503
504 for (i = 0; i < POLL_COUNT; i++)
505 if (!(inw(s->io+IT_AC_CIRCP) & CIRCP_CPS))
506 break;
507 if (i == POLL_COUNT)
508 err("wrcodec: codec ready poll expired!");
509
510 circp = addr & CIRCP_CIA_MASK;
511 circp |= (codec->id << CIRCP_CID_BIT);
512 circp &= ~CIRCP_RWC; // write command
513
514 outw(data, s->io+IT_AC_CIRDP); // send data first
515 outw(circp, s->io+IT_AC_CIRCP);
516
517 spin_unlock_irqrestore(&s->lock, flags);
518 }
519
520
521 static void waitcodec(struct ac97_codec *codec)
522 {
523 unsigned short temp;
524
525 /* codec_wait is used to wait for a ready state after
526 an AC97_RESET. */
527 it8172_delay(10);
528
529 temp = rdcodec(codec, 0x26);
530
531 // If power down, power up
532 if (temp & 0x3f00) {
533 // Power on
534 wrcodec(codec, 0x26, 0);
535 it8172_delay(100);
536 // Reread
537 temp = rdcodec(codec, 0x26);
538 }
539
540 // Check if Codec REF,ANL,DAC,ADC ready***/
541 if ((temp & 0x3f0f) != 0x000f) {
542 err("codec reg 26 status (0x%x) not ready!!", temp);
543 return;
544 }
545 }
546
547
548 /* --------------------------------------------------------------------- */
549
550 static inline void stop_adc(struct it8172_state *s)
551 {
552 struct dmabuf* db = &s->dma_adc;
553 unsigned long flags;
554 unsigned char imc;
555
556 if (db->stopped)
557 return;
558
559 spin_lock_irqsave(&s->lock, flags);
560
561 s->capcc &= ~(CC_CA | CC_CP | CC_CB2L | CC_CB1L);
562 s->capcc |= CC_CSP;
563 outw(s->capcc, s->io+IT_AC_CAPCC);
564
565 // disable capture interrupt
566 imc = inb(s->io+IT_AC_IMC);
567 outb(imc | IMC_CCIM, s->io+IT_AC_IMC);
568
569 db->stopped = 1;
570
571 spin_unlock_irqrestore(&s->lock, flags);
572 }
573
574 static inline void stop_dac(struct it8172_state *s)
575 {
576 struct dmabuf* db = &s->dma_dac;
577 unsigned long flags;
578 unsigned char imc;
579
580 if (db->stopped)
581 return;
582
583 spin_lock_irqsave(&s->lock, flags);
584
585 s->pcc &= ~(CC_CA | CC_CP | CC_CB2L | CC_CB1L);
586 s->pcc |= CC_CSP;
587 outw(s->pcc, s->io+IT_AC_PCC);
588
589 // disable playback interrupt
590 imc = inb(s->io+IT_AC_IMC);
591 outb(imc | IMC_PCIM, s->io+IT_AC_IMC);
592
593 db->stopped = 1;
594
595 spin_unlock_irqrestore(&s->lock, flags);
596 }
597
598 static void start_dac(struct it8172_state *s)
599 {
600 struct dmabuf* db = &s->dma_dac;
601 unsigned long flags;
602 unsigned char imc;
603 unsigned long buf1, buf2;
604
605 if (!db->stopped)
606 return;
607
608 spin_lock_irqsave(&s->lock, flags);
609
610 // reset Buffer 1 and 2 pointers to nextOut and nextOut+fragsize
611 buf1 = virt_to_bus(db->nextOut);
612 buf2 = buf1 + db->fragsize;
613 if (buf2 >= db->dmaaddr + db->dmasize)
614 buf2 -= db->dmasize;
615
616 outl(buf1, s->io+IT_AC_PCB1STA);
617 outl(buf2, s->io+IT_AC_PCB2STA);
618 db->curBufPtr = IT_AC_PCB1STA;
619
620 // enable playback interrupt
621 imc = inb(s->io+IT_AC_IMC);
622 outb(imc & ~IMC_PCIM, s->io+IT_AC_IMC);
623
624 s->pcc &= ~(CC_CSP | CC_CP | CC_CB2L | CC_CB1L);
625 s->pcc |= CC_CA;
626 outw(s->pcc, s->io+IT_AC_PCC);
627
628 db->stopped = 0;
629
630 spin_unlock_irqrestore(&s->lock, flags);
631 }
632
633 static void start_adc(struct it8172_state *s)
634 {
635 struct dmabuf* db = &s->dma_adc;
636 unsigned long flags;
637 unsigned char imc;
638 unsigned long buf1, buf2;
639
640 if (!db->stopped)
641 return;
642
643 spin_lock_irqsave(&s->lock, flags);
644
645 // reset Buffer 1 and 2 pointers to nextIn and nextIn+fragsize
646 buf1 = virt_to_bus(db->nextIn);
647 buf2 = buf1 + db->fragsize;
648 if (buf2 >= db->dmaaddr + db->dmasize)
649 buf2 -= db->dmasize;
650
651 outl(buf1, s->io+IT_AC_CAPB1STA);
652 outl(buf2, s->io+IT_AC_CAPB2STA);
653 db->curBufPtr = IT_AC_CAPB1STA;
654
655 // enable capture interrupt
656 imc = inb(s->io+IT_AC_IMC);
657 outb(imc & ~IMC_CCIM, s->io+IT_AC_IMC);
658
659 s->capcc &= ~(CC_CSP | CC_CP | CC_CB2L | CC_CB1L);
660 s->capcc |= CC_CA;
661 outw(s->capcc, s->io+IT_AC_CAPCC);
662
663 db->stopped = 0;
664
665 spin_unlock_irqrestore(&s->lock, flags);
666 }
667
668 /* --------------------------------------------------------------------- */
669
670 #define DMABUF_DEFAULTORDER (17-PAGE_SHIFT)
671 #define DMABUF_MINORDER 1
672
673 static inline void dealloc_dmabuf(struct it8172_state *s, struct dmabuf *db)
674 {
675 struct page *page, *pend;
676
677 if (db->rawbuf) {
678 /* undo marking the pages as reserved */
679 pend = virt_to_page(db->rawbuf +
680 (PAGE_SIZE << db->buforder) - 1);
681 for (page = virt_to_page(db->rawbuf); page <= pend; page++)
682 ClearPageReserved(page);
683 pci_free_consistent(s->dev, PAGE_SIZE << db->buforder,
684 db->rawbuf, db->dmaaddr);
685 }
686 db->rawbuf = db->nextIn = db->nextOut = NULL;
687 db->mapped = db->ready = 0;
688 }
689
690 static int prog_dmabuf(struct it8172_state *s, struct dmabuf *db,
691 unsigned rate, unsigned fmt, unsigned reg)
692 {
693 int order;
694 unsigned bytepersec;
695 unsigned bufs;
696 struct page *page, *pend;
697
698 if (!db->rawbuf) {
699 db->ready = db->mapped = 0;
700 for (order = DMABUF_DEFAULTORDER;
701 order >= DMABUF_MINORDER; order--)
702 if ((db->rawbuf =
703 pci_alloc_consistent(s->dev,
704 PAGE_SIZE << order,
705 &db->dmaaddr)))
706 break;
707 if (!db->rawbuf)
708 return -ENOMEM;
709 db->buforder = order;
710 /* now mark the pages as reserved;
711 otherwise remap_pfn_range doesn't do what we want */
712 pend = virt_to_page(db->rawbuf +
713 (PAGE_SIZE << db->buforder) - 1);
714 for (page = virt_to_page(db->rawbuf); page <= pend; page++)
715 SetPageReserved(page);
716 }
717
718 db->count = 0;
719 db->nextIn = db->nextOut = db->rawbuf;
720
721 bytepersec = rate << sample_shift[fmt];
722 bufs = PAGE_SIZE << db->buforder;
723 if (db->ossfragshift) {
724 if ((1000 << db->ossfragshift) < bytepersec)
725 db->fragshift = ld2(bytepersec/1000);
726 else
727 db->fragshift = db->ossfragshift;
728 } else {
729 db->fragshift = ld2(bytepersec/100/(db->subdivision ?
730 db->subdivision : 1));
731 if (db->fragshift < 3)
732 db->fragshift = 3;
733 }
734 db->numfrag = bufs >> db->fragshift;
735 while (db->numfrag < 4 && db->fragshift > 3) {
736 db->fragshift--;
737 db->numfrag = bufs >> db->fragshift;
738 }
739 db->fragsize = 1 << db->fragshift;
740 if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
741 db->numfrag = db->ossmaxfrags;
742 db->fragsamples = db->fragsize >> sample_shift[fmt];
743 db->dmasize = db->numfrag << db->fragshift;
744 memset(db->rawbuf, (fmt & (CC_DF>>CC_FMT_BIT)) ? 0 : 0x80, bufs);
745
746 #ifdef IT8172_VERBOSE_DEBUG
747 dbg("rate=%d, fragsize=%d, numfrag=%d, dmasize=%d",
748 rate, db->fragsize, db->numfrag, db->dmasize);
749 #endif
750
751 // set data length register
752 outw(db->fragsize, s->io+reg+2);
753 db->ready = 1;
754
755 return 0;
756 }
757
758 static inline int prog_dmabuf_adc(struct it8172_state *s)
759 {
760 stop_adc(s);
761 return prog_dmabuf(s, &s->dma_adc, s->adcrate,
762 (s->capcc & CC_FMT_MASK) >> CC_FMT_BIT,
763 IT_AC_CAPCC);
764 }
765
766 static inline int prog_dmabuf_dac(struct it8172_state *s)
767 {
768 stop_dac(s);
769 return prog_dmabuf(s, &s->dma_dac, s->dacrate,
770 (s->pcc & CC_FMT_MASK) >> CC_FMT_BIT,
771 IT_AC_PCC);
772 }
773
774
775 /* hold spinlock for the following! */
776
777 static irqreturn_t it8172_interrupt(int irq, void *dev_id, struct pt_regs *regs)
778 {
779 struct it8172_state *s = (struct it8172_state *)dev_id;
780 struct dmabuf* dac = &s->dma_dac;
781 struct dmabuf* adc = &s->dma_adc;
782 unsigned char isc, vs;
783 unsigned short vol, mute;
784 unsigned long newptr;
785
786 spin_lock(&s->lock);
787
788 isc = inb(s->io+IT_AC_ISC);
789
790 /* fastpath out, to ease interrupt sharing */
791 if (!(isc & (ISC_VCI | ISC_CCI | ISC_PCI))) {
792 spin_unlock(&s->lock);
793 return IRQ_NONE;
794 }
795
796 /* clear audio interrupts first */
797 outb(isc | ISC_VCI | ISC_CCI | ISC_PCI, s->io+IT_AC_ISC);
798
799 /* handle volume button events (ignore if S/PDIF enabled) */
800 if ((isc & ISC_VCI) && s->spdif_volume == -1) {
801 vs = inb(s->io+IT_AC_VS);
802 outb(0, s->io+IT_AC_VS);
803 vol = inw(s->io+IT_AC_PCMOV);
804 mute = vol & PCMOV_PCMOM;
805 vol &= PCMOV_PCMLCG_MASK;
806 if ((vs & VS_VUP) && vol > 0)
807 vol--;
808 if ((vs & VS_VDP) && vol < 0x1f)
809 vol++;
810 vol |= (vol << PCMOV_PCMRCG_BIT);
811 if (vs & VS_VMP)
812 vol |= (mute ^ PCMOV_PCMOM);
813 outw(vol, s->io+IT_AC_PCMOV);
814 }
815
816 /* update capture pointers */
817 if (isc & ISC_CCI) {
818 if (adc->count > adc->dmasize - adc->fragsize) {
819 // Overrun. Stop ADC and log the error
820 stop_adc(s);
821 adc->error++;
822 dbg("adc overrun");
823 } else {
824 newptr = virt_to_bus(adc->nextIn) + 2*adc->fragsize;
825 if (newptr >= adc->dmaaddr + adc->dmasize)
826 newptr -= adc->dmasize;
827
828 outl(newptr, s->io+adc->curBufPtr);
829 adc->curBufPtr = (adc->curBufPtr == IT_AC_CAPB1STA) ?
830 IT_AC_CAPB2STA : IT_AC_CAPB1STA;
831
832 adc->nextIn += adc->fragsize;
833 if (adc->nextIn >= adc->rawbuf + adc->dmasize)
834 adc->nextIn -= adc->dmasize;
835
836 adc->count += adc->fragsize;
837 adc->total_bytes += adc->fragsize;
838
839 /* wake up anybody listening */
840 if (waitqueue_active(&adc->wait))
841 wake_up_interruptible(&adc->wait);
842 }
843 }
844
845 /* update playback pointers */
846 if (isc & ISC_PCI) {
847 newptr = virt_to_bus(dac->nextOut) + 2*dac->fragsize;
848 if (newptr >= dac->dmaaddr + dac->dmasize)
849 newptr -= dac->dmasize;
850
851 outl(newptr, s->io+dac->curBufPtr);
852 dac->curBufPtr = (dac->curBufPtr == IT_AC_PCB1STA) ?
853 IT_AC_PCB2STA : IT_AC_PCB1STA;
854
855 dac->nextOut += dac->fragsize;
856 if (dac->nextOut >= dac->rawbuf + dac->dmasize)
857 dac->nextOut -= dac->dmasize;
858
859 dac->count -= dac->fragsize;
860 dac->total_bytes += dac->fragsize;
861
862 /* wake up anybody listening */
863 if (waitqueue_active(&dac->wait))
864 wake_up_interruptible(&dac->wait);
865
866 if (dac->count <= 0)
867 stop_dac(s);
868 }
869
870 spin_unlock(&s->lock);
871 return IRQ_HANDLED;
872 }
873
874 /* --------------------------------------------------------------------- */
875
876 static int it8172_open_mixdev(struct inode *inode, struct file *file)
877 {
878 int minor = iminor(inode);
879 struct list_head *list;
880 struct it8172_state *s;
881
882 for (list = devs.next; ; list = list->next) {
883 if (list == &devs)
884 return -ENODEV;
885 s = list_entry(list, struct it8172_state, devs);
886 if (s->codec.dev_mixer == minor)
887 break;
888 }
889 file->private_data = s;
890 return nonseekable_open(inode, file);
891 }
892
893 static int it8172_release_mixdev(struct inode *inode, struct file *file)
894 {
895 return 0;
896 }
897
898
899 static u16
900 cvt_ossvol(unsigned int gain)
901 {
902 u16 ret;
903
904 if (gain == 0)
905 return 0;
906
907 if (gain > 100)
908 gain = 100;
909
910 ret = (100 - gain + 32) / 4;
911 ret = ret > 31 ? 31 : ret;
912 return ret;
913 }
914
915
916 static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
917 unsigned long arg)
918 {
919 struct it8172_state *s = (struct it8172_state *)codec->private_data;
920 unsigned int left, right;
921 unsigned long flags;
922 int val;
923 u16 vol;
924
925 /*
926 * When we are in S/PDIF mode, we want to disable any analog output so
927 * we filter the master/PCM channel volume ioctls.
928 *
929 * Also filter I2S channel, which AC'97 knows nothing about.
930 */
931
932 switch (cmd) {
933 case SOUND_MIXER_WRITE_VOLUME:
934 // if not in S/PDIF mode, pass to AC'97
935 if (s->spdif_volume == -1)
936 break;
937 return 0;
938 case SOUND_MIXER_WRITE_PCM:
939 // if not in S/PDIF mode, pass to AC'97
940 if (s->spdif_volume == -1)
941 break;
942 if (get_user(val, (int *)arg))
943 return -EFAULT;
944 right = ((val >> 8) & 0xff);
945 left = (val & 0xff);
946 if (right > 100)
947 right = 100;
948 if (left > 100)
949 left = 100;
950 s->spdif_volume = (right << 8) | left;
951 vol = cvt_ossvol(left);
952 vol |= (cvt_ossvol(right) << PCMOV_PCMRCG_BIT);
953 if (vol == 0)
954 vol = PCMOV_PCMOM; // mute
955 spin_lock_irqsave(&s->lock, flags);
956 outw(vol, s->io+IT_AC_PCMOV);
957 spin_unlock_irqrestore(&s->lock, flags);
958 return put_user(s->spdif_volume, (int *)arg);
959 case SOUND_MIXER_READ_PCM:
960 // if not in S/PDIF mode, pass to AC'97
961 if (s->spdif_volume == -1)
962 break;
963 return put_user(s->spdif_volume, (int *)arg);
964 case SOUND_MIXER_WRITE_I2S:
965 if (get_user(val, (int *)arg))
966 return -EFAULT;
967 right = ((val >> 8) & 0xff);
968 left = (val & 0xff);
969 if (right > 100)
970 right = 100;
971 if (left > 100)
972 left = 100;
973 s->i2s_volume = (right << 8) | left;
974 vol = cvt_ossvol(left);
975 vol |= (cvt_ossvol(right) << I2SV_I2SRCG_BIT);
976 if (vol == 0)
977 vol = I2SV_I2SOM; // mute
978 outw(vol, s->io+IT_AC_I2SV);
979 return put_user(s->i2s_volume, (int *)arg);
980 case SOUND_MIXER_READ_I2S:
981 return put_user(s->i2s_volume, (int *)arg);
982 case SOUND_MIXER_WRITE_RECSRC:
983 if (get_user(val, (int *)arg))
984 return -EFAULT;
985 if (val & SOUND_MASK_I2S) {
986 s->i2s_recording = 1;
987 outb(DRSS_I2S, s->io+IT_AC_DRSS);
988 return 0;
989 } else {
990 s->i2s_recording = 0;
991 outb(DRSS_AC97_PRIM, s->io+IT_AC_DRSS);
992 // now let AC'97 select record source
993 break;
994 }
995 case SOUND_MIXER_READ_RECSRC:
996 if (s->i2s_recording)
997 return put_user(SOUND_MASK_I2S, (int *)arg);
998 else
999 // let AC'97 report recording source
1000 break;
1001 }
1002
1003 return codec->mixer_ioctl(codec, cmd, arg);
1004 }
1005
1006 static int it8172_ioctl_mixdev(struct inode *inode, struct file *file,
1007 unsigned int cmd, unsigned long arg)
1008 {
1009 struct it8172_state *s = (struct it8172_state *)file->private_data;
1010 struct ac97_codec *codec = &s->codec;
1011
1012 return mixdev_ioctl(codec, cmd, arg);
1013 }
1014
1015 static /*const*/ struct file_operations it8172_mixer_fops = {
1016 .owner = THIS_MODULE,
1017 .llseek = no_llseek,
1018 .ioctl = it8172_ioctl_mixdev,
1019 .open = it8172_open_mixdev,
1020 .release = it8172_release_mixdev,
1021 };
1022
1023 /* --------------------------------------------------------------------- */
1024
1025 static int drain_dac(struct it8172_state *s, int nonblock)
1026 {
1027 unsigned long flags;
1028 int count, tmo;
1029
1030 if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
1031 return 0;
1032
1033 for (;;) {
1034 spin_lock_irqsave(&s->lock, flags);
1035 count = s->dma_dac.count;
1036 spin_unlock_irqrestore(&s->lock, flags);
1037 if (count <= 0)
1038 break;
1039 if (signal_pending(current))
1040 break;
1041 //if (nonblock)
1042 //return -EBUSY;
1043 tmo = 1000 * count / s->dacrate;
1044 tmo >>= sample_shift[(s->pcc & CC_FMT_MASK) >> CC_FMT_BIT];
1045 it8172_delay(tmo);
1046 }
1047 if (signal_pending(current))
1048 return -ERESTARTSYS;
1049 return 0;
1050 }
1051
1052 /* --------------------------------------------------------------------- */
1053
1054
1055 /*
1056 * Copy audio data to/from user buffer from/to dma buffer, taking care
1057 * that we wrap when reading/writing the dma buffer. Returns actual byte
1058 * count written to or read from the dma buffer.
1059 */
1060 static int copy_dmabuf_user(struct dmabuf *db, char* userbuf,
1061 int count, int to_user)
1062 {
1063 char* bufptr = to_user ? db->nextOut : db->nextIn;
1064 char* bufend = db->rawbuf + db->dmasize;
1065
1066 if (bufptr + count > bufend) {
1067 int partial = (int)(bufend - bufptr);
1068 if (to_user) {
1069 if (copy_to_user(userbuf, bufptr, partial))
1070 return -EFAULT;
1071 if (copy_to_user(userbuf + partial, db->rawbuf,
1072 count - partial))
1073 return -EFAULT;
1074 } else {
1075 if (copy_from_user(bufptr, userbuf, partial))
1076 return -EFAULT;
1077 if (copy_from_user(db->rawbuf,
1078 userbuf + partial,
1079 count - partial))
1080 return -EFAULT;
1081 }
1082 } else {
1083 if (to_user) {
1084 if (copy_to_user(userbuf, bufptr, count))
1085 return -EFAULT;
1086 } else {
1087 if (copy_from_user(bufptr, userbuf, count))
1088 return -EFAULT;
1089 }
1090 }
1091
1092 return count;
1093 }
1094
1095
1096 static ssize_t it8172_read(struct file *file, char *buffer,
1097 size_t count, loff_t *ppos)
1098 {
1099 struct it8172_state *s = (struct it8172_state *)file->private_data;
1100 struct dmabuf *db = &s->dma_adc;
1101 ssize_t ret;
1102 unsigned long flags;
1103 int cnt, remainder, avail;
1104
1105 if (db->mapped)
1106 return -ENXIO;
1107 if (!access_ok(VERIFY_WRITE, buffer, count))
1108 return -EFAULT;
1109 ret = 0;
1110
1111 while (count > 0) {
1112 // wait for samples in capture buffer
1113 do {
1114 spin_lock_irqsave(&s->lock, flags);
1115 if (db->stopped)
1116 start_adc(s);
1117 avail = db->count;
1118 spin_unlock_irqrestore(&s->lock, flags);
1119 if (avail <= 0) {
1120 if (file->f_flags & O_NONBLOCK) {
1121 if (!ret)
1122 ret = -EAGAIN;
1123 return ret;
1124 }
1125 interruptible_sleep_on(&db->wait);
1126 if (signal_pending(current)) {
1127 if (!ret)
1128 ret = -ERESTARTSYS;
1129 return ret;
1130 }
1131 }
1132 } while (avail <= 0);
1133
1134 // copy from nextOut to user
1135 if ((cnt = copy_dmabuf_user(db, buffer, count > avail ?
1136 avail : count, 1)) < 0) {
1137 if (!ret)
1138 ret = -EFAULT;
1139 return ret;
1140 }
1141
1142 spin_lock_irqsave(&s->lock, flags);
1143 db->count -= cnt;
1144 spin_unlock_irqrestore(&s->lock, flags);
1145
1146 db->nextOut += cnt;
1147 if (db->nextOut >= db->rawbuf + db->dmasize)
1148 db->nextOut -= db->dmasize;
1149
1150 count -= cnt;
1151 buffer += cnt;
1152 ret += cnt;
1153 } // while (count > 0)
1154
1155 /*
1156 * See if the dma buffer count after this read call is
1157 * aligned on a fragsize boundary. If not, read from
1158 * buffer until we reach a boundary, and let's hope this
1159 * is just the last remainder of an audio record. If not
1160 * it means the user is not reading in fragsize chunks, in
1161 * which case it's his/her fault that there are audio gaps
1162 * in their record.
1163 */
1164 spin_lock_irqsave(&s->lock, flags);
1165 remainder = db->count % db->fragsize;
1166 if (remainder) {
1167 db->nextOut += remainder;
1168 if (db->nextOut >= db->rawbuf + db->dmasize)
1169 db->nextOut -= db->dmasize;
1170 db->count -= remainder;
1171 }
1172 spin_unlock_irqrestore(&s->lock, flags);
1173
1174 return ret;
1175 }
1176
1177 static ssize_t it8172_write(struct file *file, const char *buffer,
1178 size_t count, loff_t *ppos)
1179 {
1180 struct it8172_state *s = (struct it8172_state *)file->private_data;
1181 struct dmabuf *db = &s->dma_dac;
1182 ssize_t ret;
1183 unsigned long flags;
1184 int cnt, remainder, avail;
1185
1186 if (db->mapped)
1187 return -ENXIO;
1188 if (!access_ok(VERIFY_READ, buffer, count))
1189 return -EFAULT;
1190 ret = 0;
1191
1192 while (count > 0) {
1193 // wait for space in playback buffer
1194 do {
1195 spin_lock_irqsave(&s->lock, flags);
1196 avail = db->dmasize - db->count;
1197 spin_unlock_irqrestore(&s->lock, flags);
1198 if (avail <= 0) {
1199 if (file->f_flags & O_NONBLOCK) {
1200 if (!ret)
1201 ret = -EAGAIN;
1202 return ret;
1203 }
1204 interruptible_sleep_on(&db->wait);
1205 if (signal_pending(current)) {
1206 if (!ret)
1207 ret = -ERESTARTSYS;
1208 return ret;
1209 }
1210 }
1211 } while (avail <= 0);
1212
1213 // copy to nextIn
1214 if ((cnt = copy_dmabuf_user(db, (char*)buffer,
1215 count > avail ?
1216 avail : count, 0)) < 0) {
1217 if (!ret)
1218 ret = -EFAULT;
1219 return ret;
1220 }
1221
1222 spin_lock_irqsave(&s->lock, flags);
1223 db->count += cnt;
1224 if (db->stopped)
1225 start_dac(s);
1226 spin_unlock_irqrestore(&s->lock, flags);
1227
1228 db->nextIn += cnt;
1229 if (db->nextIn >= db->rawbuf + db->dmasize)
1230 db->nextIn -= db->dmasize;
1231
1232 count -= cnt;
1233 buffer += cnt;
1234 ret += cnt;
1235 } // while (count > 0)
1236
1237 /*
1238 * See if the dma buffer count after this write call is
1239 * aligned on a fragsize boundary. If not, fill buffer
1240 * with silence to the next boundary, and let's hope this
1241 * is just the last remainder of an audio playback. If not
1242 * it means the user is not sending us fragsize chunks, in
1243 * which case it's his/her fault that there are audio gaps
1244 * in their playback.
1245 */
1246 spin_lock_irqsave(&s->lock, flags);
1247 remainder = db->count % db->fragsize;
1248 if (remainder) {
1249 int fill_cnt = db->fragsize - remainder;
1250 memset(db->nextIn, 0, fill_cnt);
1251 db->nextIn += fill_cnt;
1252 if (db->nextIn >= db->rawbuf + db->dmasize)
1253 db->nextIn -= db->dmasize;
1254 db->count += fill_cnt;
1255 }
1256 spin_unlock_irqrestore(&s->lock, flags);
1257
1258 return ret;
1259 }
1260
1261 /* No kernel lock - we have our own spinlock */
1262 static unsigned int it8172_poll(struct file *file,
1263 struct poll_table_struct *wait)
1264 {
1265 struct it8172_state *s = (struct it8172_state *)file->private_data;
1266 unsigned long flags;
1267 unsigned int mask = 0;
1268
1269 if (file->f_mode & FMODE_WRITE) {
1270 if (!s->dma_dac.ready)
1271 return 0;
1272 poll_wait(file, &s->dma_dac.wait, wait);
1273 }
1274 if (file->f_mode & FMODE_READ) {
1275 if (!s->dma_adc.ready)
1276 return 0;
1277 poll_wait(file, &s->dma_adc.wait, wait);
1278 }
1279
1280 spin_lock_irqsave(&s->lock, flags);
1281 if (file->f_mode & FMODE_READ) {
1282 if (s->dma_adc.count >= (signed)s->dma_adc.fragsize)
1283 mask |= POLLIN | POLLRDNORM;
1284 }
1285 if (file->f_mode & FMODE_WRITE) {
1286 if (s->dma_dac.mapped) {
1287 if (s->dma_dac.count >= (signed)s->dma_dac.fragsize)
1288 mask |= POLLOUT | POLLWRNORM;
1289 } else {
1290 if ((signed)s->dma_dac.dmasize >=
1291 s->dma_dac.count + (signed)s->dma_dac.fragsize)
1292 mask |= POLLOUT | POLLWRNORM;
1293 }
1294 }
1295 spin_unlock_irqrestore(&s->lock, flags);
1296 return mask;
1297 }
1298
1299 static int it8172_mmap(struct file *file, struct vm_area_struct *vma)
1300 {
1301 struct it8172_state *s = (struct it8172_state *)file->private_data;
1302 struct dmabuf *db;
1303 unsigned long size;
1304
1305 lock_kernel();
1306 if (vma->vm_flags & VM_WRITE)
1307 db = &s->dma_dac;
1308 else if (vma->vm_flags & VM_READ)
1309 db = &s->dma_adc;
1310 else {
1311 unlock_kernel();
1312 return -EINVAL;
1313 }
1314 if (vma->vm_pgoff != 0) {
1315 unlock_kernel();
1316 return -EINVAL;
1317 }
1318 size = vma->vm_end - vma->vm_start;
1319 if (size > (PAGE_SIZE << db->buforder)) {
1320 unlock_kernel();
1321 return -EINVAL;
1322 }
1323 if (remap_pfn_range(vma, vma->vm_start,
1324 virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
1325 size, vma->vm_page_prot)) {
1326 unlock_kernel();
1327 return -EAGAIN;
1328 }
1329 db->mapped = 1;
1330 unlock_kernel();
1331 return 0;
1332 }
1333
1334
1335 #ifdef IT8172_VERBOSE_DEBUG
1336 static struct ioctl_str_t {
1337 unsigned int cmd;
1338 const char* str;
1339 } ioctl_str[] = {
1340 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1341 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1342 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1343 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1344 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1345 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1346 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1347 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1348 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1349 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1350 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1351 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1352 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1353 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1354 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1355 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1356 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1357 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1358 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1359 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1360 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1361 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1362 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1363 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1364 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1365 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1366 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1367 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1368 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1369 {OSS_GETVERSION, "OSS_GETVERSION"},
1370 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1371 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1372 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1373 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1374 };
1375 #endif
1376
1377 static int it8172_ioctl(struct inode *inode, struct file *file,
1378 unsigned int cmd, unsigned long arg)
1379 {
1380 struct it8172_state *s = (struct it8172_state *)file->private_data;
1381 unsigned long flags;
1382 audio_buf_info abinfo;
1383 count_info cinfo;
1384 int count;
1385 int val, mapped, ret, diff;
1386
1387 mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1388 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1389
1390 #ifdef IT8172_VERBOSE_DEBUG
1391 for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
1392 if (ioctl_str[count].cmd == cmd)
1393 break;
1394 }
1395 if (count < sizeof(ioctl_str)/sizeof(ioctl_str[0]))
1396 dbg("ioctl %s, arg=0x%08x",
1397 ioctl_str[count].str, (unsigned int)arg);
1398 else
1399 dbg("ioctl unknown, 0x%x", cmd);
1400 #endif
1401
1402 switch (cmd) {
1403 case OSS_GETVERSION:
1404 return put_user(SOUND_VERSION, (int *)arg);
1405
1406 case SNDCTL_DSP_SYNC:
1407 if (file->f_mode & FMODE_WRITE)
1408 return drain_dac(s, file->f_flags & O_NONBLOCK);
1409 return 0;
1410
1411 case SNDCTL_DSP_SETDUPLEX:
1412 return 0;
1413
1414 case SNDCTL_DSP_GETCAPS:
1415 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1416 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1417
1418 case SNDCTL_DSP_RESET:
1419 if (file->f_mode & FMODE_WRITE) {
1420 stop_dac(s);
1421 synchronize_irq(s->irq);
1422 s->dma_dac.count = s->dma_dac.total_bytes = 0;
1423 s->dma_dac.nextIn = s->dma_dac.nextOut =
1424 s->dma_dac.rawbuf;
1425 }
1426 if (file->f_mode & FMODE_READ) {
1427 stop_adc(s);
1428 synchronize_irq(s->irq);
1429 s->dma_adc.count = s->dma_adc.total_bytes = 0;
1430 s->dma_adc.nextIn = s->dma_adc.nextOut =
1431 s->dma_adc.rawbuf;
1432 }
1433 return 0;
1434
1435 case SNDCTL_DSP_SPEED:
1436 if (get_user(val, (int *)arg))
1437 return -EFAULT;
1438 if (val >= 0) {
1439 if (file->f_mode & FMODE_READ) {
1440 stop_adc(s);
1441 set_adc_rate(s, val);
1442 if ((ret = prog_dmabuf_adc(s)))
1443 return ret;
1444 }
1445 if (file->f_mode & FMODE_WRITE) {
1446 stop_dac(s);
1447 set_dac_rate(s, val);
1448 if ((ret = prog_dmabuf_dac(s)))
1449 return ret;
1450 }
1451 }
1452 return put_user((file->f_mode & FMODE_READ) ?
1453 s->adcrate : s->dacrate, (int *)arg);
1454
1455 case SNDCTL_DSP_STEREO:
1456 if (get_user(val, (int *)arg))
1457 return -EFAULT;
1458 if (file->f_mode & FMODE_READ) {
1459 stop_adc(s);
1460 if (val)
1461 s->capcc |= CC_SM;
1462 else
1463 s->capcc &= ~CC_SM;
1464 outw(s->capcc, s->io+IT_AC_CAPCC);
1465 if ((ret = prog_dmabuf_adc(s)))
1466 return ret;
1467 }
1468 if (file->f_mode & FMODE_WRITE) {
1469 stop_dac(s);
1470 if (val)
1471 s->pcc |= CC_SM;
1472 else
1473 s->pcc &= ~CC_SM;
1474 outw(s->pcc, s->io+IT_AC_PCC);
1475 if ((ret = prog_dmabuf_dac(s)))
1476 return ret;
1477 }
1478 return 0;
1479
1480 case SNDCTL_DSP_CHANNELS:
1481 if (get_user(val, (int *)arg))
1482 return -EFAULT;
1483 if (val != 0) {
1484 if (file->f_mode & FMODE_READ) {
1485 stop_adc(s);
1486 if (val >= 2) {
1487 val = 2;
1488 s->capcc |= CC_SM;
1489 }
1490 else
1491 s->capcc &= ~CC_SM;
1492 outw(s->capcc, s->io+IT_AC_CAPCC);
1493 if ((ret = prog_dmabuf_adc(s)))
1494 return ret;
1495 }
1496 if (file->f_mode & FMODE_WRITE) {
1497 stop_dac(s);
1498 switch (val) {
1499 case 1:
1500 s->pcc &= ~CC_SM;
1501 break;
1502 case 2:
1503 s->pcc |= CC_SM;
1504 break;
1505 default:
1506 // FIX! support multichannel???
1507 val = 2;
1508 s->pcc |= CC_SM;
1509 break;
1510 }
1511 outw(s->pcc, s->io+IT_AC_PCC);
1512 if ((ret = prog_dmabuf_dac(s)))
1513 return ret;
1514 }
1515 }
1516 return put_user(val, (int *)arg);
1517
1518 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1519 return put_user(AFMT_S16_LE|AFMT_U8, (int *)arg);
1520
1521 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
1522 if (get_user(val, (int *)arg))
1523 return -EFAULT;
1524 if (val != AFMT_QUERY) {
1525 if (file->f_mode & FMODE_READ) {
1526 stop_adc(s);
1527 if (val == AFMT_S16_LE)
1528 s->capcc |= CC_DF;
1529 else {
1530 val = AFMT_U8;
1531 s->capcc &= ~CC_DF;
1532 }
1533 outw(s->capcc, s->io+IT_AC_CAPCC);
1534 if ((ret = prog_dmabuf_adc(s)))
1535 return ret;
1536 }
1537 if (file->f_mode & FMODE_WRITE) {
1538 stop_dac(s);
1539 if (val == AFMT_S16_LE)
1540 s->pcc |= CC_DF;
1541 else {
1542 val = AFMT_U8;
1543 s->pcc &= ~CC_DF;
1544 }
1545 outw(s->pcc, s->io+IT_AC_PCC);
1546 if ((ret = prog_dmabuf_dac(s)))
1547 return ret;
1548 }
1549 } else {
1550 if (file->f_mode & FMODE_READ)
1551 val = (s->capcc & CC_DF) ?
1552 AFMT_S16_LE : AFMT_U8;
1553 else
1554 val = (s->pcc & CC_DF) ?
1555 AFMT_S16_LE : AFMT_U8;
1556 }
1557 return put_user(val, (int *)arg);
1558
1559 case SNDCTL_DSP_POST:
1560 return 0;
1561
1562 case SNDCTL_DSP_GETTRIGGER:
1563 val = 0;
1564 spin_lock_irqsave(&s->lock, flags);
1565 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1566 val |= PCM_ENABLE_INPUT;
1567 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1568 val |= PCM_ENABLE_OUTPUT;
1569 spin_unlock_irqrestore(&s->lock, flags);
1570 return put_user(val, (int *)arg);
1571
1572 case SNDCTL_DSP_SETTRIGGER:
1573 if (get_user(val, (int *)arg))
1574 return -EFAULT;
1575 if (file->f_mode & FMODE_READ) {
1576 if (val & PCM_ENABLE_INPUT)
1577 start_adc(s);
1578 else
1579 stop_adc(s);
1580 }
1581 if (file->f_mode & FMODE_WRITE) {
1582 if (val & PCM_ENABLE_OUTPUT)
1583 start_dac(s);
1584 else
1585 stop_dac(s);
1586 }
1587 return 0;
1588
1589 case SNDCTL_DSP_GETOSPACE:
1590 if (!(file->f_mode & FMODE_WRITE))
1591 return -EINVAL;
1592 abinfo.fragsize = s->dma_dac.fragsize;
1593 spin_lock_irqsave(&s->lock, flags);
1594 count = s->dma_dac.count;
1595 if (!s->dma_dac.stopped)
1596 count -= (s->dma_dac.fragsize -
1597 inw(s->io+IT_AC_PCDL));
1598 spin_unlock_irqrestore(&s->lock, flags);
1599 if (count < 0)
1600 count = 0;
1601 abinfo.bytes = s->dma_dac.dmasize - count;
1602 abinfo.fragstotal = s->dma_dac.numfrag;
1603 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1604 return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ?
1605 -EFAULT : 0;
1606
1607 case SNDCTL_DSP_GETISPACE:
1608 if (!(file->f_mode & FMODE_READ))
1609 return -EINVAL;
1610 abinfo.fragsize = s->dma_adc.fragsize;
1611 spin_lock_irqsave(&s->lock, flags);
1612 count = s->dma_adc.count;
1613 if (!s->dma_adc.stopped)
1614 count += (s->dma_adc.fragsize -
1615 inw(s->io+IT_AC_CAPCDL));
1616 spin_unlock_irqrestore(&s->lock, flags);
1617 if (count < 0)
1618 count = 0;
1619 abinfo.bytes = count;
1620 abinfo.fragstotal = s->dma_adc.numfrag;
1621 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1622 return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ?
1623 -EFAULT : 0;
1624
1625 case SNDCTL_DSP_NONBLOCK:
1626 file->f_flags |= O_NONBLOCK;
1627 return 0;
1628
1629 case SNDCTL_DSP_GETODELAY:
1630 if (!(file->f_mode & FMODE_WRITE))
1631 return -EINVAL;
1632 spin_lock_irqsave(&s->lock, flags);
1633 count = s->dma_dac.count;
1634 if (!s->dma_dac.stopped)
1635 count -= (s->dma_dac.fragsize -
1636 inw(s->io+IT_AC_PCDL));
1637 spin_unlock_irqrestore(&s->lock, flags);
1638 if (count < 0)
1639 count = 0;
1640 return put_user(count, (int *)arg);
1641
1642 case SNDCTL_DSP_GETIPTR:
1643 if (!(file->f_mode & FMODE_READ))
1644 return -EINVAL;
1645 spin_lock_irqsave(&s->lock, flags);
1646 cinfo.bytes = s->dma_adc.total_bytes;
1647 count = s->dma_adc.count;
1648 if (!s->dma_adc.stopped) {
1649 diff = s->dma_adc.fragsize - inw(s->io+IT_AC_CAPCDL);
1650 count += diff;
1651 cinfo.bytes += diff;
1652 cinfo.ptr = inl(s->io+s->dma_adc.curBufPtr) -
1653 s->dma_adc.dmaaddr;
1654 } else
1655 cinfo.ptr = virt_to_bus(s->dma_adc.nextIn) -
1656 s->dma_adc.dmaaddr;
1657 if (s->dma_adc.mapped)
1658 s->dma_adc.count &= s->dma_adc.fragsize-1;
1659 spin_unlock_irqrestore(&s->lock, flags);
1660 if (count < 0)
1661 count = 0;
1662 cinfo.blocks = count >> s->dma_adc.fragshift;
1663 if (copy_to_user((void *)arg, &cinfo, sizeof(cinfo)))
1664 return -EFAULT;
1665 return 0;
1666
1667 case SNDCTL_DSP_GETOPTR:
1668 if (!(file->f_mode & FMODE_READ))
1669 return -EINVAL;
1670 spin_lock_irqsave(&s->lock, flags);
1671 cinfo.bytes = s->dma_dac.total_bytes;
1672 count = s->dma_dac.count;
1673 if (!s->dma_dac.stopped) {
1674 diff = s->dma_dac.fragsize - inw(s->io+IT_AC_CAPCDL);
1675 count -= diff;
1676 cinfo.bytes += diff;
1677 cinfo.ptr = inl(s->io+s->dma_dac.curBufPtr) -
1678 s->dma_dac.dmaaddr;
1679 } else
1680 cinfo.ptr = virt_to_bus(s->dma_dac.nextOut) -
1681 s->dma_dac.dmaaddr;
1682 if (s->dma_dac.mapped)
1683 s->dma_dac.count &= s->dma_dac.fragsize-1;
1684 spin_unlock_irqrestore(&s->lock, flags);
1685 if (count < 0)
1686 count = 0;
1687 cinfo.blocks = count >> s->dma_dac.fragshift;
1688 if (copy_to_user((void *)arg, &cinfo, sizeof(cinfo)))
1689 return -EFAULT;
1690 return 0;
1691
1692 case SNDCTL_DSP_GETBLKSIZE:
1693 if (file->f_mode & FMODE_WRITE)
1694 return put_user(s->dma_dac.fragsize, (int *)arg);
1695 else
1696 return put_user(s->dma_adc.fragsize, (int *)arg);
1697
1698 case SNDCTL_DSP_SETFRAGMENT:
1699 if (get_user(val, (int *)arg))
1700 return -EFAULT;
1701 if (file->f_mode & FMODE_READ) {
1702 stop_adc(s);
1703 s->dma_adc.ossfragshift = val & 0xffff;
1704 s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1705 if (s->dma_adc.ossfragshift < 4)
1706 s->dma_adc.ossfragshift = 4;
1707 if (s->dma_adc.ossfragshift > 15)
1708 s->dma_adc.ossfragshift = 15;
1709 if (s->dma_adc.ossmaxfrags < 4)
1710 s->dma_adc.ossmaxfrags = 4;
1711 if ((ret = prog_dmabuf_adc(s)))
1712 return ret;
1713 }
1714 if (file->f_mode & FMODE_WRITE) {
1715 stop_dac(s);
1716 s->dma_dac.ossfragshift = val & 0xffff;
1717 s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1718 if (s->dma_dac.ossfragshift < 4)
1719 s->dma_dac.ossfragshift = 4;
1720 if (s->dma_dac.ossfragshift > 15)
1721 s->dma_dac.ossfragshift = 15;
1722 if (s->dma_dac.ossmaxfrags < 4)
1723 s->dma_dac.ossmaxfrags = 4;
1724 if ((ret = prog_dmabuf_dac(s)))
1725 return ret;
1726 }
1727 return 0;
1728
1729 case SNDCTL_DSP_SUBDIVIDE:
1730 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1731 (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1732 return -EINVAL;
1733 if (get_user(val, (int *)arg))
1734 return -EFAULT;
1735 if (val != 1 && val != 2 && val != 4)
1736 return -EINVAL;
1737 if (file->f_mode & FMODE_READ) {
1738 stop_adc(s);
1739 s->dma_adc.subdivision = val;
1740 if ((ret = prog_dmabuf_adc(s)))
1741 return ret;
1742 }
1743 if (file->f_mode & FMODE_WRITE) {
1744 stop_dac(s);
1745 s->dma_dac.subdivision = val;
1746 if ((ret = prog_dmabuf_dac(s)))
1747 return ret;
1748 }
1749 return 0;
1750
1751 case SOUND_PCM_READ_RATE:
1752 return put_user((file->f_mode & FMODE_READ) ?
1753 s->adcrate : s->dacrate, (int *)arg);
1754
1755 case SOUND_PCM_READ_CHANNELS:
1756 if (file->f_mode & FMODE_READ)
1757 return put_user((s->capcc & CC_SM) ? 2 : 1,
1758 (int *)arg);
1759 else
1760 return put_user((s->pcc & CC_SM) ? 2 : 1,
1761 (int *)arg);
1762
1763 case SOUND_PCM_READ_BITS:
1764 if (file->f_mode & FMODE_READ)
1765 return put_user((s->capcc & CC_DF) ? 16 : 8,
1766 (int *)arg);
1767 else
1768 return put_user((s->pcc & CC_DF) ? 16 : 8,
1769 (int *)arg);
1770
1771 case SOUND_PCM_WRITE_FILTER:
1772 case SNDCTL_DSP_SETSYNCRO:
1773 case SOUND_PCM_READ_FILTER:
1774 return -EINVAL;
1775 }
1776
1777 return mixdev_ioctl(&s->codec, cmd, arg);
1778 }
1779
1780
1781 static int it8172_open(struct inode *inode, struct file *file)
1782 {
1783 int minor = iminor(inode);
1784 DECLARE_WAITQUEUE(wait, current);
1785 unsigned long flags;
1786 struct list_head *list;
1787 struct it8172_state *s;
1788 int ret;
1789
1790 #ifdef IT8172_VERBOSE_DEBUG
1791 if (file->f_flags & O_NONBLOCK)
1792 dbg("%s: non-blocking", __FUNCTION__);
1793 else
1794 dbg("%s: blocking", __FUNCTION__);
1795 #endif
1796
1797 for (list = devs.next; ; list = list->next) {
1798 if (list == &devs)
1799 return -ENODEV;
1800 s = list_entry(list, struct it8172_state, devs);
1801 if (!((s->dev_audio ^ minor) & ~0xf))
1802 break;
1803 }
1804 file->private_data = s;
1805 /* wait for device to become free */
1806 mutex_lock(&s->open_mutex);
1807 while (s->open_mode & file->f_mode) {
1808 if (file->f_flags & O_NONBLOCK) {
1809 mutex_unlock(&s->open_mutex);
1810 return -EBUSY;
1811 }
1812 add_wait_queue(&s->open_wait, &wait);
1813 __set_current_state(TASK_INTERRUPTIBLE);
1814 mutex_unlock(&s->open_mutex);
1815 schedule();
1816 remove_wait_queue(&s->open_wait, &wait);
1817 set_current_state(TASK_RUNNING);
1818 if (signal_pending(current))
1819 return -ERESTARTSYS;
1820 mutex_lock(&s->open_mutex);
1821 }
1822
1823 spin_lock_irqsave(&s->lock, flags);
1824
1825 if (file->f_mode & FMODE_READ) {
1826 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1827 s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1828 s->capcc &= ~(CC_SM | CC_DF);
1829 set_adc_rate(s, 8000);
1830 if ((minor & 0xf) == SND_DEV_DSP16)
1831 s->capcc |= CC_DF;
1832 outw(s->capcc, s->io+IT_AC_CAPCC);
1833 if ((ret = prog_dmabuf_adc(s))) {
1834 spin_unlock_irqrestore(&s->lock, flags);
1835 return ret;
1836 }
1837 }
1838 if (file->f_mode & FMODE_WRITE) {
1839 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1840 s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1841 s->pcc &= ~(CC_SM | CC_DF);
1842 set_dac_rate(s, 8000);
1843 if ((minor & 0xf) == SND_DEV_DSP16)
1844 s->pcc |= CC_DF;
1845 outw(s->pcc, s->io+IT_AC_PCC);
1846 if ((ret = prog_dmabuf_dac(s))) {
1847 spin_unlock_irqrestore(&s->lock, flags);
1848 return ret;
1849 }
1850 }
1851
1852 spin_unlock_irqrestore(&s->lock, flags);
1853
1854 s->open_mode |= (file->f_mode & (FMODE_READ | FMODE_WRITE));
1855 mutex_unlock(&s->open_mutex);
1856 return nonseekable_open(inode, file);
1857 }
1858
1859 static int it8172_release(struct inode *inode, struct file *file)
1860 {
1861 struct it8172_state *s = (struct it8172_state *)file->private_data;
1862
1863 #ifdef IT8172_VERBOSE_DEBUG
1864 dbg("%s", __FUNCTION__);
1865 #endif
1866 lock_kernel();
1867 if (file->f_mode & FMODE_WRITE)
1868 drain_dac(s, file->f_flags & O_NONBLOCK);
1869 mutex_lock(&s->open_mutex);
1870 if (file->f_mode & FMODE_WRITE) {
1871 stop_dac(s);
1872 dealloc_dmabuf(s, &s->dma_dac);
1873 }
1874 if (file->f_mode & FMODE_READ) {
1875 stop_adc(s);
1876 dealloc_dmabuf(s, &s->dma_adc);
1877 }
1878 s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1879 mutex_unlock(&s->open_mutex);
1880 wake_up(&s->open_wait);
1881 unlock_kernel();
1882 return 0;
1883 }
1884
1885 static /*const*/ struct file_operations it8172_audio_fops = {
1886 .owner = THIS_MODULE,
1887 .llseek = no_llseek,
1888 .read = it8172_read,
1889 .write = it8172_write,
1890 .poll = it8172_poll,
1891 .ioctl = it8172_ioctl,
1892 .mmap = it8172_mmap,
1893 .open = it8172_open,
1894 .release = it8172_release,
1895 };
1896
1897
1898 /* --------------------------------------------------------------------- */
1899
1900
1901 /* --------------------------------------------------------------------- */
1902
1903 /*
1904 * for debugging purposes, we'll create a proc device that dumps the
1905 * CODEC chipstate
1906 */
1907
1908 #ifdef IT8172_DEBUG
1909 static int proc_it8172_dump (char *buf, char **start, off_t fpos,
1910 int length, int *eof, void *data)
1911 {
1912 struct it8172_state *s;
1913 int cnt, len = 0;
1914
1915 if (list_empty(&devs))
1916 return 0;
1917 s = list_entry(devs.next, struct it8172_state, devs);
1918
1919 /* print out header */
1920 len += sprintf(buf + len, "\n\t\tIT8172 Audio Debug\n\n");
1921
1922 // print out digital controller state
1923 len += sprintf (buf + len, "IT8172 Audio Controller registers\n");
1924 len += sprintf (buf + len, "---------------------------------\n");
1925 cnt=0;
1926 while (cnt < 0x72) {
1927 if (cnt == IT_AC_PCB1STA || cnt == IT_AC_PCB2STA ||
1928 cnt == IT_AC_CAPB1STA || cnt == IT_AC_CAPB2STA ||
1929 cnt == IT_AC_PFDP) {
1930 len+= sprintf (buf + len, "reg %02x = %08x\n",
1931 cnt, inl(s->io+cnt));
1932 cnt += 4;
1933 } else {
1934 len+= sprintf (buf + len, "reg %02x = %04x\n",
1935 cnt, inw(s->io+cnt));
1936 cnt += 2;
1937 }
1938 }
1939
1940 /* print out CODEC state */
1941 len += sprintf (buf + len, "\nAC97 CODEC registers\n");
1942 len += sprintf (buf + len, "----------------------\n");
1943 for (cnt=0; cnt <= 0x7e; cnt = cnt +2)
1944 len+= sprintf (buf + len, "reg %02x = %04x\n",
1945 cnt, rdcodec(&s->codec, cnt));
1946
1947 if (fpos >=len){
1948 *start = buf;
1949 *eof =1;
1950 return 0;
1951 }
1952 *start = buf + fpos;
1953 if ((len -= fpos) > length)
1954 return length;
1955 *eof =1;
1956 return len;
1957
1958 }
1959 #endif /* IT8172_DEBUG */
1960
1961 /* --------------------------------------------------------------------- */
1962
1963 /* maximum number of devices; only used for command line params */
1964 #define NR_DEVICE 5
1965
1966 static int spdif[NR_DEVICE];
1967 static int i2s_fmt[NR_DEVICE];
1968
1969 static unsigned int devindex;
1970
1971 module_param_array(spdif, int, NULL, 0);
1972 MODULE_PARM_DESC(spdif, "if 1 the S/PDIF digital output is enabled");
1973 module_param_array(i2s_fmt, int, NULL, 0);
1974 MODULE_PARM_DESC(i2s_fmt, "the format of I2S");
1975
1976 MODULE_AUTHOR("Monta Vista Software, stevel@mvista.com");
1977 MODULE_DESCRIPTION("IT8172 Audio Driver");
1978
1979 /* --------------------------------------------------------------------- */
1980
1981 static int __devinit it8172_probe(struct pci_dev *pcidev,
1982 const struct pci_device_id *pciid)
1983 {
1984 struct it8172_state *s;
1985 int i, val;
1986 unsigned short pcisr, vol;
1987 unsigned char legacy, imc;
1988 char proc_str[80];
1989
1990 if (pcidev->irq == 0)
1991 return -1;
1992
1993 if (!(s = kmalloc(sizeof(struct it8172_state), GFP_KERNEL))) {
1994 err("alloc of device struct failed");
1995 return -1;
1996 }
1997
1998 memset(s, 0, sizeof(struct it8172_state));
1999 init_waitqueue_head(&s->dma_adc.wait);
2000 init_waitqueue_head(&s->dma_dac.wait);
2001 init_waitqueue_head(&s->open_wait);
2002 mutex_init(&s->open_mutex);
2003 spin_lock_init(&s->lock);
2004 s->dev = pcidev;
2005 s->io = pci_resource_start(pcidev, 0);
2006 s->irq = pcidev->irq;
2007 s->vendor = pcidev->vendor;
2008 s->device = pcidev->device;
2009 pci_read_config_byte(pcidev, PCI_REVISION_ID, &s->rev);
2010 s->codec.private_data = s;
2011 s->codec.id = 0;
2012 s->codec.codec_read = rdcodec;
2013 s->codec.codec_write = wrcodec;
2014 s->codec.codec_wait = waitcodec;
2015
2016 if (!request_region(s->io, pci_resource_len(pcidev,0),
2017 IT8172_MODULE_NAME)) {
2018 err("io ports %#lx->%#lx in use",
2019 s->io, s->io + pci_resource_len(pcidev,0)-1);
2020 goto err_region;
2021 }
2022 if (request_irq(s->irq, it8172_interrupt, SA_INTERRUPT,
2023 IT8172_MODULE_NAME, s)) {
2024 err("irq %u in use", s->irq);
2025 goto err_irq;
2026 }
2027
2028 info("IO at %#lx, IRQ %d", s->io, s->irq);
2029
2030 /* register devices */
2031 if ((s->dev_audio = register_sound_dsp(&it8172_audio_fops, -1)) < 0)
2032 goto err_dev1;
2033 if ((s->codec.dev_mixer =
2034 register_sound_mixer(&it8172_mixer_fops, -1)) < 0)
2035 goto err_dev2;
2036
2037 #ifdef IT8172_DEBUG
2038 /* initialize the debug proc device */
2039 s->ps = create_proc_read_entry(IT8172_MODULE_NAME, 0, NULL,
2040 proc_it8172_dump, NULL);
2041 #endif /* IT8172_DEBUG */
2042
2043 /*
2044 * Reset the Audio device using the IT8172 PCI Reset register. This
2045 * creates an audible double click on a speaker connected to Line-out.
2046 */
2047 IT_IO_READ16(IT_PM_PCISR, pcisr);
2048 pcisr |= IT_PM_PCISR_ACSR;
2049 IT_IO_WRITE16(IT_PM_PCISR, pcisr);
2050 /* wait up to 100msec for reset to complete */
2051 for (i=0; pcisr & IT_PM_PCISR_ACSR; i++) {
2052 it8172_delay(10);
2053 if (i == 10)
2054 break;
2055 IT_IO_READ16(IT_PM_PCISR, pcisr);
2056 }
2057 if (i == 10) {
2058 err("chip reset timeout!");
2059 goto err_dev3;
2060 }
2061
2062 /* enable pci io and bus mastering */
2063 if (pci_enable_device(pcidev))
2064 goto err_dev3;
2065 pci_set_master(pcidev);
2066
2067 /* get out of legacy mode */
2068 pci_read_config_byte (pcidev, 0x40, &legacy);
2069 pci_write_config_byte (pcidev, 0x40, legacy & ~1);
2070
2071 s->spdif_volume = -1;
2072 /* check to see if s/pdif mode is being requested */
2073 if (spdif[devindex]) {
2074 info("enabling S/PDIF output");
2075 s->spdif_volume = 0;
2076 outb(GC_SOE, s->io+IT_AC_GC);
2077 } else {
2078 info("disabling S/PDIF output");
2079 outb(0, s->io+IT_AC_GC);
2080 }
2081
2082 /* check to see if I2S format requested */
2083 if (i2s_fmt[devindex]) {
2084 info("setting I2S format to 0x%02x", i2s_fmt[devindex]);
2085 outb(i2s_fmt[devindex], s->io+IT_AC_I2SMC);
2086 } else {
2087 outb(I2SMC_I2SF_I2S, s->io+IT_AC_I2SMC);
2088 }
2089
2090 /* cold reset the AC97 */
2091 outw(CODECC_CR, s->io+IT_AC_CODECC);
2092 udelay(1000);
2093 outw(0, s->io+IT_AC_CODECC);
2094 /* need to delay around 500msec(bleech) to give
2095 some CODECs enough time to wakeup */
2096 it8172_delay(500);
2097
2098 /* AC97 warm reset to start the bitclk */
2099 outw(CODECC_WR, s->io+IT_AC_CODECC);
2100 udelay(1000);
2101 outw(0, s->io+IT_AC_CODECC);
2102
2103 /* codec init */
2104 if (!ac97_probe_codec(&s->codec))
2105 goto err_dev3;
2106
2107 /* add I2S as allowable recording source */
2108 s->codec.record_sources |= SOUND_MASK_I2S;
2109
2110 /* Enable Volume button interrupts */
2111 imc = inb(s->io+IT_AC_IMC);
2112 outb(imc & ~IMC_VCIM, s->io+IT_AC_IMC);
2113
2114 /* Un-mute PCM and FM out on the controller */
2115 vol = inw(s->io+IT_AC_PCMOV);
2116 outw(vol & ~PCMOV_PCMOM, s->io+IT_AC_PCMOV);
2117 vol = inw(s->io+IT_AC_FMOV);
2118 outw(vol & ~FMOV_FMOM, s->io+IT_AC_FMOV);
2119
2120 /* set channel defaults to 8-bit, mono, 8 Khz */
2121 s->pcc = 0;
2122 s->capcc = 0;
2123 set_dac_rate(s, 8000);
2124 set_adc_rate(s, 8000);
2125
2126 /* set mic to be the recording source */
2127 val = SOUND_MASK_MIC;
2128 mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_RECSRC,
2129 (unsigned long)&val);
2130
2131 /* mute AC'97 master and PCM when in S/PDIF mode */
2132 if (s->spdif_volume != -1) {
2133 val = 0x0000;
2134 s->codec.mixer_ioctl(&s->codec, SOUND_MIXER_WRITE_VOLUME,
2135 (unsigned long)&val);
2136 s->codec.mixer_ioctl(&s->codec, SOUND_MIXER_WRITE_PCM,
2137 (unsigned long)&val);
2138 }
2139
2140 #ifdef IT8172_DEBUG
2141 sprintf(proc_str, "driver/%s/%d/ac97", IT8172_MODULE_NAME,
2142 s->codec.id);
2143 s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
2144 ac97_read_proc, &s->codec);
2145 #endif
2146
2147 /* store it in the driver field */
2148 pci_set_drvdata(pcidev, s);
2149 pcidev->dma_mask = 0xffffffff;
2150 /* put it into driver list */
2151 list_add_tail(&s->devs, &devs);
2152 /* increment devindex */
2153 if (devindex < NR_DEVICE-1)
2154 devindex++;
2155 return 0;
2156
2157 err_dev3:
2158 unregister_sound_mixer(s->codec.dev_mixer);
2159 err_dev2:
2160 unregister_sound_dsp(s->dev_audio);
2161 err_dev1:
2162 err("cannot register misc device");
2163 free_irq(s->irq, s);
2164 err_irq:
2165 release_region(s->io, pci_resource_len(pcidev,0));
2166 err_region:
2167 kfree(s);
2168 return -1;
2169 }
2170
2171 static void __devexit it8172_remove(struct pci_dev *dev)
2172 {
2173 struct it8172_state *s = pci_get_drvdata(dev);
2174
2175 if (!s)
2176 return;
2177 list_del(&s->devs);
2178 #ifdef IT8172_DEBUG
2179 if (s->ps)
2180 remove_proc_entry(IT8172_MODULE_NAME, NULL);
2181 #endif /* IT8172_DEBUG */
2182 synchronize_irq(s->irq);
2183 free_irq(s->irq, s);
2184 release_region(s->io, pci_resource_len(dev,0));
2185 unregister_sound_dsp(s->dev_audio);
2186 unregister_sound_mixer(s->codec.dev_mixer);
2187 kfree(s);
2188 pci_set_drvdata(dev, NULL);
2189 }
2190
2191
2192
2193 static struct pci_device_id id_table[] = {
2194 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_IT8172G_AUDIO, PCI_ANY_ID,
2195 PCI_ANY_ID, 0, 0 },
2196 { 0, }
2197 };
2198
2199 MODULE_DEVICE_TABLE(pci, id_table);
2200
2201 static struct pci_driver it8172_driver = {
2202 .name = IT8172_MODULE_NAME,
2203 .id_table = id_table,
2204 .probe = it8172_probe,
2205 .remove = __devexit_p(it8172_remove)
2206 };
2207
2208 static int __init init_it8172(void)
2209 {
2210 info("version v0.5 time " __TIME__ " " __DATE__);
2211 return pci_register_driver(&it8172_driver);
2212 }
2213
2214 static void __exit cleanup_it8172(void)
2215 {
2216 info("unloading");
2217 pci_unregister_driver(&it8172_driver);
2218 }
2219
2220 module_init(init_it8172);
2221 module_exit(cleanup_it8172);
2222
2223 /* --------------------------------------------------------------------- */
2224
2225 #ifndef MODULE
2226
2227 /* format is: it8172=[spdif],[i2s:<I2S format>] */
2228
2229 static int __init it8172_setup(char *options)
2230 {
2231 char* this_opt;
2232 static unsigned __initdata nr_dev = 0;
2233
2234 if (nr_dev >= NR_DEVICE)
2235 return 0;
2236
2237 if (!options || !*options)
2238 return 0;
2239
2240 while (this_opt = strsep(&options, ",")) {
2241 if (!*this_opt)
2242 continue;
2243 if (!strncmp(this_opt, "spdif", 5)) {
2244 spdif[nr_dev] = 1;
2245 } else if (!strncmp(this_opt, "i2s:", 4)) {
2246 if (!strncmp(this_opt+4, "dac", 3))
2247 i2s_fmt[nr_dev] = I2SMC_I2SF_DAC;
2248 else if (!strncmp(this_opt+4, "adc", 3))
2249 i2s_fmt[nr_dev] = I2SMC_I2SF_ADC;
2250 else if (!strncmp(this_opt+4, "i2s", 3))
2251 i2s_fmt[nr_dev] = I2SMC_I2SF_I2S;
2252 }
2253 }
2254
2255 nr_dev++;
2256 return 1;
2257 }
2258
2259 __setup("it8172=", it8172_setup);
2260
2261 #endif /* MODULE */
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