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Merge branch 'work.init' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-kernels.git] / sound / pci / via82xx_modem.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * ALSA modem driver for VIA VT82xx (South Bridge)
4 *
5 * VT82C686A/B/C, VT8233A/C, VT8235
6 *
7 * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
8 * Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
9 * 2002 Takashi Iwai <tiwai@suse.de>
10 */
11
12 /*
13 * Changes:
14 *
15 * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org>
16 * Modified from original audio driver 'via82xx.c' to support AC97
17 * modems.
18 */
19
20 #include <linux/io.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/slab.h>
26 #include <linux/module.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/pcm_params.h>
30 #include <sound/info.h>
31 #include <sound/ac97_codec.h>
32 #include <sound/initval.h>
33
34 #if 0
35 #define POINTER_DEBUG
36 #endif
37
38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
39 MODULE_DESCRIPTION("VIA VT82xx modem");
40 MODULE_LICENSE("GPL");
41
42 static int index = -2; /* Exclude the first card */
43 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
44 static int ac97_clock = 48000;
45
46 module_param(index, int, 0444);
47 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
48 module_param(id, charp, 0444);
49 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
50 module_param(ac97_clock, int, 0444);
51 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
52
53 /* just for backward compatibility */
54 static bool enable;
55 module_param(enable, bool, 0444);
56
57
58 /*
59 * Direct registers
60 */
61
62 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
63 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
64
65 /* common offsets */
66 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */
67 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */
68 #define VIA_REG_STAT_PAUSED 0x40 /* RO */
69 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */
70 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */
71 #define VIA_REG_STAT_EOL 0x02 /* RWC */
72 #define VIA_REG_STAT_FLAG 0x01 /* RWC */
73 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */
74 #define VIA_REG_CTRL_START 0x80 /* WO */
75 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */
76 #define VIA_REG_CTRL_AUTOSTART 0x20
77 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */
78 #define VIA_REG_CTRL_INT_STOP 0x04
79 #define VIA_REG_CTRL_INT_EOL 0x02
80 #define VIA_REG_CTRL_INT_FLAG 0x01
81 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */
82 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
83 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */
84 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */
85 #define VIA_REG_TYPE_16BIT 0x20 /* RW */
86 #define VIA_REG_TYPE_STEREO 0x10 /* RW */
87 #define VIA_REG_TYPE_INT_LLINE 0x00
88 #define VIA_REG_TYPE_INT_LSAMPLE 0x04
89 #define VIA_REG_TYPE_INT_LESSONE 0x08
90 #define VIA_REG_TYPE_INT_MASK 0x0c
91 #define VIA_REG_TYPE_INT_EOL 0x02
92 #define VIA_REG_TYPE_INT_FLAG 0x01
93 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */
94 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */
95 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */
96 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */
97 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */
98
99 #define DEFINE_VIA_REGSET(name,val) \
100 enum {\
101 VIA_REG_##name##_STATUS = (val),\
102 VIA_REG_##name##_CONTROL = (val) + 0x01,\
103 VIA_REG_##name##_TYPE = (val) + 0x02,\
104 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\
105 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\
106 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\
107 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\
108 }
109
110 /* modem block */
111 DEFINE_VIA_REGSET(MO, 0x40);
112 DEFINE_VIA_REGSET(MI, 0x50);
113
114 /* AC'97 */
115 #define VIA_REG_AC97 0x80 /* dword */
116 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30)
117 #define VIA_REG_AC97_CODEC_ID_SHIFT 30
118 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
119 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
120 #define VIA_REG_AC97_SECONDARY_VALID (1<<27)
121 #define VIA_REG_AC97_PRIMARY_VALID (1<<25)
122 #define VIA_REG_AC97_BUSY (1<<24)
123 #define VIA_REG_AC97_READ (1<<23)
124 #define VIA_REG_AC97_CMD_SHIFT 16
125 #define VIA_REG_AC97_CMD_MASK 0x7e
126 #define VIA_REG_AC97_DATA_SHIFT 0
127 #define VIA_REG_AC97_DATA_MASK 0xffff
128
129 #define VIA_REG_SGD_SHADOW 0x84 /* dword */
130 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0)
131 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1)
132 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2)
133 #define VIA_REG_SGD_STAT_PB_EOL (1<<4)
134 #define VIA_REG_SGD_STAT_CP_EOL (1<<5)
135 #define VIA_REG_SGD_STAT_FM_EOL (1<<6)
136 #define VIA_REG_SGD_STAT_PB_STOP (1<<8)
137 #define VIA_REG_SGD_STAT_CP_STOP (1<<9)
138 #define VIA_REG_SGD_STAT_FM_STOP (1<<10)
139 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12)
140 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13)
141 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14)
142 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16)
143 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17)
144 #define VIA_REG_SGD_STAT_MR_EOL (1<<20)
145 #define VIA_REG_SGD_STAT_MW_EOL (1<<21)
146 #define VIA_REG_SGD_STAT_MR_STOP (1<<24)
147 #define VIA_REG_SGD_STAT_MW_STOP (1<<25)
148 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28)
149 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29)
150
151 #define VIA_REG_GPI_STATUS 0x88
152 #define VIA_REG_GPI_INTR 0x8c
153
154 #define VIA_TBL_BIT_FLAG 0x40000000
155 #define VIA_TBL_BIT_EOL 0x80000000
156
157 /* pci space */
158 #define VIA_ACLINK_STAT 0x40
159 #define VIA_ACLINK_C11_READY 0x20
160 #define VIA_ACLINK_C10_READY 0x10
161 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */
162 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */
163 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */
164 #define VIA_ACLINK_CTRL 0x41
165 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
166 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */
167 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */
168 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */
169 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */
170 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */
171 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */
172 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */
173 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\
174 VIA_ACLINK_CTRL_RESET|\
175 VIA_ACLINK_CTRL_PCM)
176 #define VIA_FUNC_ENABLE 0x42
177 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */
178 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */
179 #define VIA_FUNC_RX2C_WRITE 0x20
180 #define VIA_FUNC_SB_FIFO_EMPTY 0x10
181 #define VIA_FUNC_ENABLE_GAME 0x08
182 #define VIA_FUNC_ENABLE_FM 0x04
183 #define VIA_FUNC_ENABLE_MIDI 0x02
184 #define VIA_FUNC_ENABLE_SB 0x01
185 #define VIA_PNP_CONTROL 0x43
186 #define VIA_MC97_CTRL 0x44
187 #define VIA_MC97_CTRL_ENABLE 0x80
188 #define VIA_MC97_CTRL_SECONDARY 0x40
189 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\
190 VIA_MC97_CTRL_SECONDARY)
191
192
193 /*
194 * pcm stream
195 */
196
197 struct snd_via_sg_table {
198 unsigned int offset;
199 unsigned int size;
200 } ;
201
202 #define VIA_TABLE_SIZE 255
203
204 struct viadev {
205 unsigned int reg_offset;
206 unsigned long port;
207 int direction; /* playback = 0, capture = 1 */
208 struct snd_pcm_substream *substream;
209 int running;
210 unsigned int tbl_entries; /* # descriptors */
211 struct snd_dma_buffer table;
212 struct snd_via_sg_table *idx_table;
213 /* for recovery from the unexpected pointer */
214 unsigned int lastpos;
215 unsigned int bufsize;
216 unsigned int bufsize2;
217 };
218
219 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
220
221 #define VIA_MAX_MODEM_DEVS 2
222
223 struct via82xx_modem {
224 int irq;
225
226 unsigned long port;
227
228 unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
229
230 struct pci_dev *pci;
231 struct snd_card *card;
232
233 unsigned int num_devs;
234 unsigned int playback_devno, capture_devno;
235 struct viadev devs[VIA_MAX_MODEM_DEVS];
236
237 struct snd_pcm *pcms[2];
238
239 struct snd_ac97_bus *ac97_bus;
240 struct snd_ac97 *ac97;
241 unsigned int ac97_clock;
242 unsigned int ac97_secondary; /* secondary AC'97 codec is present */
243
244 spinlock_t reg_lock;
245 struct snd_info_entry *proc_entry;
246 };
247
248 static const struct pci_device_id snd_via82xx_modem_ids[] = {
249 { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
250 { 0, }
251 };
252
253 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
254
255 /*
256 */
257
258 /*
259 * allocate and initialize the descriptor buffers
260 * periods = number of periods
261 * fragsize = period size in bytes
262 */
263 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
264 struct pci_dev *pci,
265 unsigned int periods, unsigned int fragsize)
266 {
267 unsigned int i, idx, ofs, rest;
268 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
269 __le32 *pgtbl;
270
271 if (dev->table.area == NULL) {
272 /* the start of each lists must be aligned to 8 bytes,
273 * but the kernel pages are much bigger, so we don't care
274 */
275 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
276 PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
277 &dev->table) < 0)
278 return -ENOMEM;
279 }
280 if (! dev->idx_table) {
281 dev->idx_table = kmalloc_array(VIA_TABLE_SIZE,
282 sizeof(*dev->idx_table),
283 GFP_KERNEL);
284 if (! dev->idx_table)
285 return -ENOMEM;
286 }
287
288 /* fill the entries */
289 idx = 0;
290 ofs = 0;
291 pgtbl = (__le32 *)dev->table.area;
292 for (i = 0; i < periods; i++) {
293 rest = fragsize;
294 /* fill descriptors for a period.
295 * a period can be split to several descriptors if it's
296 * over page boundary.
297 */
298 do {
299 unsigned int r;
300 unsigned int flag;
301 unsigned int addr;
302
303 if (idx >= VIA_TABLE_SIZE) {
304 dev_err(&pci->dev, "too much table size!\n");
305 return -EINVAL;
306 }
307 addr = snd_pcm_sgbuf_get_addr(substream, ofs);
308 pgtbl[idx << 1] = cpu_to_le32(addr);
309 r = PAGE_SIZE - (ofs % PAGE_SIZE);
310 if (rest < r)
311 r = rest;
312 rest -= r;
313 if (! rest) {
314 if (i == periods - 1)
315 flag = VIA_TBL_BIT_EOL; /* buffer boundary */
316 else
317 flag = VIA_TBL_BIT_FLAG; /* period boundary */
318 } else
319 flag = 0; /* period continues to the next */
320 /*
321 dev_dbg(&pci->dev,
322 "tbl %d: at %d size %d (rest %d)\n",
323 idx, ofs, r, rest);
324 */
325 pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag);
326 dev->idx_table[idx].offset = ofs;
327 dev->idx_table[idx].size = r;
328 ofs += r;
329 idx++;
330 } while (rest > 0);
331 }
332 dev->tbl_entries = idx;
333 dev->bufsize = periods * fragsize;
334 dev->bufsize2 = dev->bufsize / 2;
335 return 0;
336 }
337
338
339 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
340 struct pci_dev *pci)
341 {
342 if (dev->table.area) {
343 snd_dma_free_pages(&dev->table);
344 dev->table.area = NULL;
345 }
346 kfree(dev->idx_table);
347 dev->idx_table = NULL;
348 return 0;
349 }
350
351 /*
352 * Basic I/O
353 */
354
355 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
356 {
357 return inl(VIAREG(chip, AC97));
358 }
359
360 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
361 {
362 outl(val, VIAREG(chip, AC97));
363 }
364
365 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
366 {
367 unsigned int timeout = 1000; /* 1ms */
368 unsigned int val;
369
370 while (timeout-- > 0) {
371 udelay(1);
372 val = snd_via82xx_codec_xread(chip);
373 if (!(val & VIA_REG_AC97_BUSY))
374 return val & 0xffff;
375 }
376 dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
377 secondary, snd_via82xx_codec_xread(chip));
378 return -EIO;
379 }
380
381 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
382 {
383 unsigned int timeout = 1000; /* 1ms */
384 unsigned int val, val1;
385 unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
386 VIA_REG_AC97_SECONDARY_VALID;
387
388 while (timeout-- > 0) {
389 val = snd_via82xx_codec_xread(chip);
390 val1 = val & (VIA_REG_AC97_BUSY | stat);
391 if (val1 == stat)
392 return val & 0xffff;
393 udelay(1);
394 }
395 return -EIO;
396 }
397
398 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
399 {
400 struct via82xx_modem *chip = ac97->private_data;
401 __always_unused int err;
402 err = snd_via82xx_codec_ready(chip, ac97->num);
403 /* here we need to wait fairly for long time.. */
404 msleep(500);
405 }
406
407 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
408 unsigned short reg,
409 unsigned short val)
410 {
411 struct via82xx_modem *chip = ac97->private_data;
412 unsigned int xval;
413 if(reg == AC97_GPIO_STATUS) {
414 outl(val, VIAREG(chip, GPI_STATUS));
415 return;
416 }
417 xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
418 xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
419 xval |= reg << VIA_REG_AC97_CMD_SHIFT;
420 xval |= val << VIA_REG_AC97_DATA_SHIFT;
421 snd_via82xx_codec_xwrite(chip, xval);
422 snd_via82xx_codec_ready(chip, ac97->num);
423 }
424
425 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
426 {
427 struct via82xx_modem *chip = ac97->private_data;
428 unsigned int xval, val = 0xffff;
429 int again = 0;
430
431 xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
432 xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
433 xval |= VIA_REG_AC97_READ;
434 xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
435 while (1) {
436 if (again++ > 3) {
437 dev_err(chip->card->dev,
438 "codec_read: codec %i is not valid [0x%x]\n",
439 ac97->num, snd_via82xx_codec_xread(chip));
440 return 0xffff;
441 }
442 snd_via82xx_codec_xwrite(chip, xval);
443 udelay (20);
444 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
445 udelay(25);
446 val = snd_via82xx_codec_xread(chip);
447 break;
448 }
449 }
450 return val & 0xffff;
451 }
452
453 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
454 {
455 outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
456 VIADEV_REG(viadev, OFFSET_CONTROL));
457 inb(VIADEV_REG(viadev, OFFSET_CONTROL));
458 udelay(50);
459 /* disable interrupts */
460 outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
461 /* clear interrupts */
462 outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
463 outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
464 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
465 viadev->lastpos = 0;
466 }
467
468
469 /*
470 * Interrupt handler
471 */
472
473 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
474 {
475 struct via82xx_modem *chip = dev_id;
476 unsigned int status;
477 unsigned int i;
478
479 status = inl(VIAREG(chip, SGD_SHADOW));
480 if (! (status & chip->intr_mask)) {
481 return IRQ_NONE;
482 }
483 // _skip_sgd:
484
485 /* check status for each stream */
486 spin_lock(&chip->reg_lock);
487 for (i = 0; i < chip->num_devs; i++) {
488 struct viadev *viadev = &chip->devs[i];
489 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
490 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
491 if (! c_status)
492 continue;
493 if (viadev->substream && viadev->running) {
494 spin_unlock(&chip->reg_lock);
495 snd_pcm_period_elapsed(viadev->substream);
496 spin_lock(&chip->reg_lock);
497 }
498 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
499 }
500 spin_unlock(&chip->reg_lock);
501 return IRQ_HANDLED;
502 }
503
504 /*
505 * PCM callbacks
506 */
507
508 /*
509 * trigger callback
510 */
511 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
512 {
513 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
514 struct viadev *viadev = substream->runtime->private_data;
515 unsigned char val = 0;
516
517 switch (cmd) {
518 case SNDRV_PCM_TRIGGER_START:
519 case SNDRV_PCM_TRIGGER_SUSPEND:
520 val |= VIA_REG_CTRL_START;
521 viadev->running = 1;
522 break;
523 case SNDRV_PCM_TRIGGER_STOP:
524 val = VIA_REG_CTRL_TERMINATE;
525 viadev->running = 0;
526 break;
527 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
528 val |= VIA_REG_CTRL_PAUSE;
529 viadev->running = 0;
530 break;
531 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
532 viadev->running = 1;
533 break;
534 default:
535 return -EINVAL;
536 }
537 outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
538 if (cmd == SNDRV_PCM_TRIGGER_STOP)
539 snd_via82xx_channel_reset(chip, viadev);
540 return 0;
541 }
542
543 /*
544 * pointer callbacks
545 */
546
547 /*
548 * calculate the linear position at the given sg-buffer index and the rest count
549 */
550
551 #define check_invalid_pos(viadev,pos) \
552 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
553 viadev->lastpos < viadev->bufsize2))
554
555 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
556 struct viadev *viadev,
557 unsigned int idx,
558 unsigned int count)
559 {
560 unsigned int size, res;
561
562 size = viadev->idx_table[idx].size;
563 res = viadev->idx_table[idx].offset + size - count;
564
565 /* check the validity of the calculated position */
566 if (size < count) {
567 dev_err(chip->card->dev,
568 "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
569 (int)size, (int)count);
570 res = viadev->lastpos;
571 } else if (check_invalid_pos(viadev, res)) {
572 #ifdef POINTER_DEBUG
573 dev_dbg(chip->card->dev,
574 "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
575 idx, viadev->tbl_entries, viadev->lastpos,
576 viadev->bufsize2, viadev->idx_table[idx].offset,
577 viadev->idx_table[idx].size, count);
578 #endif
579 if (count && size < count) {
580 dev_dbg(chip->card->dev,
581 "invalid via82xx_cur_ptr, using last valid pointer\n");
582 res = viadev->lastpos;
583 } else {
584 if (! count)
585 /* bogus count 0 on the DMA boundary? */
586 res = viadev->idx_table[idx].offset;
587 else
588 /* count register returns full size
589 * when end of buffer is reached
590 */
591 res = viadev->idx_table[idx].offset + size;
592 if (check_invalid_pos(viadev, res)) {
593 dev_dbg(chip->card->dev,
594 "invalid via82xx_cur_ptr (2), using last valid pointer\n");
595 res = viadev->lastpos;
596 }
597 }
598 }
599 viadev->lastpos = res; /* remember the last position */
600 if (res >= viadev->bufsize)
601 res -= viadev->bufsize;
602 return res;
603 }
604
605 /*
606 * get the current pointer on via686
607 */
608 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
609 {
610 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
611 struct viadev *viadev = substream->runtime->private_data;
612 unsigned int idx, ptr, count, res;
613
614 if (snd_BUG_ON(!viadev->tbl_entries))
615 return 0;
616 if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
617 return 0;
618
619 spin_lock(&chip->reg_lock);
620 count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
621 /* The via686a does not have the current index register,
622 * so we need to calculate the index from CURR_PTR.
623 */
624 ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
625 if (ptr <= (unsigned int)viadev->table.addr)
626 idx = 0;
627 else /* CURR_PTR holds the address + 8 */
628 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
629 viadev->tbl_entries;
630 res = calc_linear_pos(chip, viadev, idx, count);
631 spin_unlock(&chip->reg_lock);
632
633 return bytes_to_frames(substream->runtime, res);
634 }
635
636 /*
637 * hw_params callback:
638 * allocate the buffer and build up the buffer description table
639 */
640 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
641 struct snd_pcm_hw_params *hw_params)
642 {
643 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
644 struct viadev *viadev = substream->runtime->private_data;
645 int err;
646
647 err = build_via_table(viadev, substream, chip->pci,
648 params_periods(hw_params),
649 params_period_bytes(hw_params));
650 if (err < 0)
651 return err;
652
653 snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
654 snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
655
656 return 0;
657 }
658
659 /*
660 * hw_free callback:
661 * clean up the buffer description table and release the buffer
662 */
663 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
664 {
665 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
666 struct viadev *viadev = substream->runtime->private_data;
667
668 clean_via_table(viadev, substream, chip->pci);
669 return 0;
670 }
671
672
673 /*
674 * set up the table pointer
675 */
676 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
677 {
678 snd_via82xx_codec_ready(chip, chip->ac97_secondary);
679 outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
680 udelay(20);
681 snd_via82xx_codec_ready(chip, chip->ac97_secondary);
682 }
683
684 /*
685 * prepare callback for playback and capture
686 */
687 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
688 {
689 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
690 struct viadev *viadev = substream->runtime->private_data;
691
692 snd_via82xx_channel_reset(chip, viadev);
693 /* this must be set after channel_reset */
694 snd_via82xx_set_table_ptr(chip, viadev);
695 outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
696 VIADEV_REG(viadev, OFFSET_TYPE));
697 return 0;
698 }
699
700 /*
701 * pcm hardware definition, identical for both playback and capture
702 */
703 static const struct snd_pcm_hardware snd_via82xx_hw =
704 {
705 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
706 SNDRV_PCM_INFO_BLOCK_TRANSFER |
707 SNDRV_PCM_INFO_MMAP_VALID |
708 /* SNDRV_PCM_INFO_RESUME | */
709 SNDRV_PCM_INFO_PAUSE),
710 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
711 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
712 .rate_min = 8000,
713 .rate_max = 16000,
714 .channels_min = 1,
715 .channels_max = 1,
716 .buffer_bytes_max = 128 * 1024,
717 .period_bytes_min = 32,
718 .period_bytes_max = 128 * 1024,
719 .periods_min = 2,
720 .periods_max = VIA_TABLE_SIZE / 2,
721 .fifo_size = 0,
722 };
723
724
725 /*
726 * open callback skeleton
727 */
728 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
729 struct snd_pcm_substream *substream)
730 {
731 struct snd_pcm_runtime *runtime = substream->runtime;
732 int err;
733 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
734 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
735 .count = ARRAY_SIZE(rates),
736 .list = rates,
737 .mask = 0,
738 };
739
740 runtime->hw = snd_via82xx_hw;
741
742 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
743 &hw_constraints_rates);
744 if (err < 0)
745 return err;
746
747 /* we may remove following constaint when we modify table entries
748 in interrupt */
749 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
750 if (err < 0)
751 return err;
752
753 runtime->private_data = viadev;
754 viadev->substream = substream;
755
756 return 0;
757 }
758
759
760 /*
761 * open callback for playback
762 */
763 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
764 {
765 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
766 struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
767
768 return snd_via82xx_modem_pcm_open(chip, viadev, substream);
769 }
770
771 /*
772 * open callback for capture
773 */
774 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
775 {
776 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
777 struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
778
779 return snd_via82xx_modem_pcm_open(chip, viadev, substream);
780 }
781
782 /*
783 * close callback
784 */
785 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
786 {
787 struct viadev *viadev = substream->runtime->private_data;
788
789 viadev->substream = NULL;
790 return 0;
791 }
792
793
794 /* via686 playback callbacks */
795 static const struct snd_pcm_ops snd_via686_playback_ops = {
796 .open = snd_via82xx_playback_open,
797 .close = snd_via82xx_pcm_close,
798 .hw_params = snd_via82xx_hw_params,
799 .hw_free = snd_via82xx_hw_free,
800 .prepare = snd_via82xx_pcm_prepare,
801 .trigger = snd_via82xx_pcm_trigger,
802 .pointer = snd_via686_pcm_pointer,
803 };
804
805 /* via686 capture callbacks */
806 static const struct snd_pcm_ops snd_via686_capture_ops = {
807 .open = snd_via82xx_capture_open,
808 .close = snd_via82xx_pcm_close,
809 .hw_params = snd_via82xx_hw_params,
810 .hw_free = snd_via82xx_hw_free,
811 .prepare = snd_via82xx_pcm_prepare,
812 .trigger = snd_via82xx_pcm_trigger,
813 .pointer = snd_via686_pcm_pointer,
814 };
815
816
817 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
818 int direction)
819 {
820 chip->devs[idx].reg_offset = reg_offset;
821 chip->devs[idx].direction = direction;
822 chip->devs[idx].port = chip->port + reg_offset;
823 }
824
825 /*
826 * create a pcm instance for via686a/b
827 */
828 static int snd_via686_pcm_new(struct via82xx_modem *chip)
829 {
830 struct snd_pcm *pcm;
831 int err;
832
833 chip->playback_devno = 0;
834 chip->capture_devno = 1;
835 chip->num_devs = 2;
836 chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
837
838 err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
839 if (err < 0)
840 return err;
841 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
842 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
843 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
844 pcm->private_data = chip;
845 strcpy(pcm->name, chip->card->shortname);
846 chip->pcms[0] = pcm;
847 init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
848 init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
849
850 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
851 &chip->pci->dev, 64*1024, 128*1024);
852 return 0;
853 }
854
855
856 /*
857 * Mixer part
858 */
859
860
861 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
862 {
863 struct via82xx_modem *chip = bus->private_data;
864 chip->ac97_bus = NULL;
865 }
866
867 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
868 {
869 struct via82xx_modem *chip = ac97->private_data;
870 chip->ac97 = NULL;
871 }
872
873
874 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
875 {
876 struct snd_ac97_template ac97;
877 int err;
878 static const struct snd_ac97_bus_ops ops = {
879 .write = snd_via82xx_codec_write,
880 .read = snd_via82xx_codec_read,
881 .wait = snd_via82xx_codec_wait,
882 };
883
884 err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
885 if (err < 0)
886 return err;
887 chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
888 chip->ac97_bus->clock = chip->ac97_clock;
889
890 memset(&ac97, 0, sizeof(ac97));
891 ac97.private_data = chip;
892 ac97.private_free = snd_via82xx_mixer_free_ac97;
893 ac97.pci = chip->pci;
894 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
895 ac97.num = chip->ac97_secondary;
896
897 err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
898 if (err < 0)
899 return err;
900
901 return 0;
902 }
903
904
905 /*
906 * proc interface
907 */
908 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
909 {
910 struct via82xx_modem *chip = entry->private_data;
911 int i;
912
913 snd_iprintf(buffer, "%s\n\n", chip->card->longname);
914 for (i = 0; i < 0xa0; i += 4) {
915 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
916 }
917 }
918
919 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
920 {
921 snd_card_ro_proc_new(chip->card, "via82xx", chip,
922 snd_via82xx_proc_read);
923 }
924
925 /*
926 *
927 */
928
929 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
930 {
931 unsigned int val;
932 unsigned long end_time;
933 unsigned char pval;
934
935 pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
936 if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
937 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
938 udelay(100);
939 }
940
941 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
942 if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
943 /* deassert ACLink reset, force SYNC */
944 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
945 VIA_ACLINK_CTRL_ENABLE |
946 VIA_ACLINK_CTRL_RESET |
947 VIA_ACLINK_CTRL_SYNC);
948 udelay(100);
949 #if 1 /* FIXME: should we do full reset here for all chip models? */
950 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
951 udelay(100);
952 #else
953 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
954 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
955 VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
956 udelay(2);
957 #endif
958 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
959 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
960 udelay(100);
961 }
962
963 pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
964 if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
965 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
966 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
967 udelay(100);
968 }
969
970 /* wait until codec ready */
971 end_time = jiffies + msecs_to_jiffies(750);
972 do {
973 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
974 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
975 break;
976 schedule_timeout_uninterruptible(1);
977 } while (time_before(jiffies, end_time));
978
979 val = snd_via82xx_codec_xread(chip);
980 if (val & VIA_REG_AC97_BUSY)
981 dev_err(chip->card->dev,
982 "AC'97 codec is not ready [0x%x]\n", val);
983
984 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
985 VIA_REG_AC97_SECONDARY_VALID |
986 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
987 end_time = jiffies + msecs_to_jiffies(750);
988 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
989 VIA_REG_AC97_SECONDARY_VALID |
990 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
991 do {
992 val = snd_via82xx_codec_xread(chip);
993 if (val & VIA_REG_AC97_SECONDARY_VALID) {
994 chip->ac97_secondary = 1;
995 goto __ac97_ok2;
996 }
997 schedule_timeout_uninterruptible(1);
998 } while (time_before(jiffies, end_time));
999 /* This is ok, the most of motherboards have only one codec */
1000
1001 __ac97_ok2:
1002
1003 /* route FM trap to IRQ, disable FM trap */
1004 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1005 /* disable all GPI interrupts */
1006 outl(0, VIAREG(chip, GPI_INTR));
1007
1008 return 0;
1009 }
1010
1011 #ifdef CONFIG_PM_SLEEP
1012 /*
1013 * power management
1014 */
1015 static int snd_via82xx_suspend(struct device *dev)
1016 {
1017 struct snd_card *card = dev_get_drvdata(dev);
1018 struct via82xx_modem *chip = card->private_data;
1019 int i;
1020
1021 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1022 for (i = 0; i < chip->num_devs; i++)
1023 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1024 snd_ac97_suspend(chip->ac97);
1025 return 0;
1026 }
1027
1028 static int snd_via82xx_resume(struct device *dev)
1029 {
1030 struct snd_card *card = dev_get_drvdata(dev);
1031 struct via82xx_modem *chip = card->private_data;
1032 int i;
1033
1034 snd_via82xx_chip_init(chip);
1035
1036 snd_ac97_resume(chip->ac97);
1037
1038 for (i = 0; i < chip->num_devs; i++)
1039 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1040
1041 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1042 return 0;
1043 }
1044
1045 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1046 #define SND_VIA82XX_PM_OPS &snd_via82xx_pm
1047 #else
1048 #define SND_VIA82XX_PM_OPS NULL
1049 #endif /* CONFIG_PM_SLEEP */
1050
1051 static void snd_via82xx_free(struct snd_card *card)
1052 {
1053 struct via82xx_modem *chip = card->private_data;
1054 unsigned int i;
1055
1056 /* disable interrupts */
1057 for (i = 0; i < chip->num_devs; i++)
1058 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1059 }
1060
1061 static int snd_via82xx_create(struct snd_card *card,
1062 struct pci_dev *pci,
1063 int chip_type,
1064 int revision,
1065 unsigned int ac97_clock)
1066 {
1067 struct via82xx_modem *chip = card->private_data;
1068 int err;
1069
1070 err = pcim_enable_device(pci);
1071 if (err < 0)
1072 return err;
1073
1074 spin_lock_init(&chip->reg_lock);
1075 chip->card = card;
1076 chip->pci = pci;
1077 chip->irq = -1;
1078
1079 err = pci_request_regions(pci, card->driver);
1080 if (err < 0)
1081 return err;
1082 chip->port = pci_resource_start(pci, 0);
1083 if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt,
1084 IRQF_SHARED, KBUILD_MODNAME, chip)) {
1085 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1086 return -EBUSY;
1087 }
1088 chip->irq = pci->irq;
1089 card->sync_irq = chip->irq;
1090 card->private_free = snd_via82xx_free;
1091 if (ac97_clock >= 8000 && ac97_clock <= 48000)
1092 chip->ac97_clock = ac97_clock;
1093
1094 err = snd_via82xx_chip_init(chip);
1095 if (err < 0)
1096 return err;
1097
1098 /* The 8233 ac97 controller does not implement the master bit
1099 * in the pci command register. IMHO this is a violation of the PCI spec.
1100 * We call pci_set_master here because it does not hurt. */
1101 pci_set_master(pci);
1102 return 0;
1103 }
1104
1105
1106 static int snd_via82xx_probe(struct pci_dev *pci,
1107 const struct pci_device_id *pci_id)
1108 {
1109 struct snd_card *card;
1110 struct via82xx_modem *chip;
1111 int chip_type = 0, card_type;
1112 unsigned int i;
1113 int err;
1114
1115 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
1116 sizeof(*chip), &card);
1117 if (err < 0)
1118 return err;
1119 chip = card->private_data;
1120
1121 card_type = pci_id->driver_data;
1122 switch (card_type) {
1123 case TYPE_CARD_VIA82XX_MODEM:
1124 strcpy(card->driver, "VIA82XX-MODEM");
1125 sprintf(card->shortname, "VIA 82XX modem");
1126 break;
1127 default:
1128 dev_err(card->dev, "invalid card type %d\n", card_type);
1129 return -EINVAL;
1130 }
1131
1132 err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1133 ac97_clock);
1134 if (err < 0)
1135 return err;
1136 err = snd_via82xx_mixer_new(chip);
1137 if (err < 0)
1138 return err;
1139
1140 err = snd_via686_pcm_new(chip);
1141 if (err < 0)
1142 return err;
1143
1144 /* disable interrupts */
1145 for (i = 0; i < chip->num_devs; i++)
1146 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1147
1148 sprintf(card->longname, "%s at 0x%lx, irq %d",
1149 card->shortname, chip->port, chip->irq);
1150
1151 snd_via82xx_proc_init(chip);
1152
1153 err = snd_card_register(card);
1154 if (err < 0)
1155 return err;
1156 pci_set_drvdata(pci, card);
1157 return 0;
1158 }
1159
1160 static struct pci_driver via82xx_modem_driver = {
1161 .name = KBUILD_MODNAME,
1162 .id_table = snd_via82xx_modem_ids,
1163 .probe = snd_via82xx_probe,
1164 .driver = {
1165 .pm = SND_VIA82XX_PM_OPS,
1166 },
1167 };
1168
1169 module_pci_driver(via82xx_modem_driver);
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