1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
4 *
5 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
6 */
7
8#include <linux/io.h>
9#include <linux/delay.h>
10#include <linux/interrupt.h>
11#include <linux/init.h>
12#include <linux/pci.h>
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/mutex.h>
16#include <sound/core.h>
17#include <sound/pcm.h>
18#include <sound/pcm_params.h>
19#include <sound/info.h>
20#include <sound/ac97_codec.h>
21#include <sound/initval.h>
22
23MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
24MODULE_DESCRIPTION("ATI IXP MC97 controller");
25MODULE_LICENSE("GPL");
26
27static int index = -2; /* Exclude the first card */
28static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
29static int ac97_clock = 48000;
30
31module_param(index, int, 0444);
32MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
33module_param(id, charp, 0444);
34MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
35module_param(ac97_clock, int, 0444);
36MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
37
38/* just for backward compatibility */
39static bool enable;
40module_param(enable, bool, 0444);
41
42
43/*
44 */
45
46#define ATI_REG_ISR 0x00 /* interrupt source */
47#define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)
48#define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)
49#define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)
50#define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)
51#define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)
52#define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)
53#define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)
54#define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)
55#define ATI_REG_ISR_PHYS_INTR (1U<<8)
56#define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)
57#define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)
58#define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)
59#define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)
60#define ATI_REG_ISR_NEW_FRAME (1U<<13)
61#define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14)
62
63#define ATI_REG_IER 0x04 /* interrupt enable */
64#define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)
65#define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)
66#define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
67#define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
68#define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
69#define ATI_REG_IER_PHYS_INTR_EN (1U<<8)
70#define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)
71#define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)
72#define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)
73#define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)
74#define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */
75#define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */
76#define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
77
78#define ATI_REG_CMD 0x08 /* command */
79#define ATI_REG_CMD_POWERDOWN (1U<<0)
80#define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */
81#define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */
82#define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */
83#define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */
84#define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */
85#define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */
86#define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */
87#define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */
88#define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */
89#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
90#define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */
91#define ATI_REG_CMD_LOOPBACK_EN (1U<<23)
92#define ATI_REG_CMD_PACKED_DIS (1U<<24)
93#define ATI_REG_CMD_BURST_EN (1U<<25)
94#define ATI_REG_CMD_PANIC_EN (1U<<26)
95#define ATI_REG_CMD_MODEM_PRESENT (1U<<27)
96#define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)
97#define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)
98#define ATI_REG_CMD_AC_SYNC (1U<<30)
99#define ATI_REG_CMD_AC_RESET (1U<<31)
100
101#define ATI_REG_PHYS_OUT_ADDR 0x0c
102#define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)
103#define ATI_REG_PHYS_OUT_RW (1U<<2)
104#define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)
105#define ATI_REG_PHYS_OUT_ADDR_SHIFT 9
106#define ATI_REG_PHYS_OUT_DATA_SHIFT 16
107
108#define ATI_REG_PHYS_IN_ADDR 0x10
109#define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)
110#define ATI_REG_PHYS_IN_ADDR_SHIFT 9
111#define ATI_REG_PHYS_IN_DATA_SHIFT 16
112
113#define ATI_REG_SLOTREQ 0x14
114
115#define ATI_REG_COUNTER 0x18
116#define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */
117#define ATI_REG_COUNTER_BITCLOCK (31U<<8)
118
119#define ATI_REG_IN_FIFO_THRESHOLD 0x1c
120
121#define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20
122#define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */
123#define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */
124#define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */
125#define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30
126#define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */
127#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)
128#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
129#define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38
130#define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c
131#define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40
132#define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
133#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48
134#define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c
135#define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
136#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54
137#define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58
138#define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
139#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60
140#define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64
141#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
142#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c
143#define ATI_REG_MODEM_OUT_FIFO_USED 0x70
144#define ATI_REG_MODEM_OUT_GPIO 0x74
145#define ATI_REG_MODEM_OUT_GPIO_EN 1
146#define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
147#define ATI_REG_MODEM_IN_GPIO 0x78
148
149#define ATI_REG_MODEM_MIRROR 0x7c
150#define ATI_REG_AUDIO_MIRROR 0x80
151
152#define ATI_REG_MODEM_FIFO_FLUSH 0x88
153#define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)
154#define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)
155#define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)
156#define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)
157
158/* LINKPTR */
159#define ATI_REG_LINKPTR_EN (1U<<0)
160
161#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
162
163
164struct atiixp_modem;
165
166/*
167 * DMA packate descriptor
168 */
169
170struct atiixp_dma_desc {
171 __le32 addr; /* DMA buffer address */
172 u16 status; /* status bits */
173 u16 size; /* size of the packet in dwords */
174 __le32 next; /* address of the next packet descriptor */
175};
176
177/*
178 * stream enum
179 */
180enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
181enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
182enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
183
184#define NUM_ATI_CODECS 3
185
186
187/*
188 * constants and callbacks for each DMA type
189 */
190struct atiixp_dma_ops {
191 int type; /* ATI_DMA_XXX */
192 unsigned int llp_offset; /* LINKPTR offset */
193 unsigned int dt_cur; /* DT_CUR offset */
194 /* called from open callback */
195 void (*enable_dma)(struct atiixp_modem *chip, int on);
196 /* called from trigger (START/STOP) */
197 void (*enable_transfer)(struct atiixp_modem *chip, int on);
198 /* called from trigger (STOP only) */
199 void (*flush_dma)(struct atiixp_modem *chip);
200};
201
202/*
203 * DMA stream
204 */
205struct atiixp_dma {
206 const struct atiixp_dma_ops *ops;
207 struct snd_dma_buffer desc_buf;
208 struct snd_pcm_substream *substream; /* assigned PCM substream */
209 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */
210 unsigned int period_bytes, periods;
211 int opened;
212 int running;
213 int pcm_open_flag;
214 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
215};
216
217/*
218 * ATI IXP chip
219 */
220struct atiixp_modem {
221 struct snd_card *card;
222 struct pci_dev *pci;
223
224 struct resource *res; /* memory i/o */
225 unsigned long addr;
226 void __iomem *remap_addr;
227 int irq;
228
229 struct snd_ac97_bus *ac97_bus;
230 struct snd_ac97 *ac97[NUM_ATI_CODECS];
231
232 spinlock_t reg_lock;
233
234 struct atiixp_dma dmas[NUM_ATI_DMAS];
235 struct ac97_pcm *pcms[NUM_ATI_PCMS];
236 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
237
238 int max_channels; /* max. channels for PCM out */
239
240 unsigned int codec_not_ready_bits; /* for codec detection */
241
242 int spdif_over_aclink; /* passed from the module option */
243 struct mutex open_mutex; /* playback open mutex */
244};
245
246
247/*
248 */
249static const struct pci_device_id snd_atiixp_ids[] = {
250 { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
251 { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
252 { 0, }
253};
254
255MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
256
257
258/*
259 * lowlevel functions
260 */
261
262/*
263 * update the bits of the given register.
264 * return 1 if the bits changed.
265 */
266static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
267 unsigned int mask, unsigned int value)
268{
269 void __iomem *addr = chip->remap_addr + reg;
270 unsigned int data, old_data;
271 old_data = data = readl(addr);
272 data &= ~mask;
273 data |= value;
274 if (old_data == data)
275 return 0;
276 writel(val: data, addr);
277 return 1;
278}
279
280/*
281 * macros for easy use
282 */
283#define atiixp_write(chip,reg,value) \
284 writel(value, chip->remap_addr + ATI_REG_##reg)
285#define atiixp_read(chip,reg) \
286 readl(chip->remap_addr + ATI_REG_##reg)
287#define atiixp_update(chip,reg,mask,val) \
288 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
289
290/*
291 * handling DMA packets
292 *
293 * we allocate a linear buffer for the DMA, and split it to each packet.
294 * in a future version, a scatter-gather buffer should be implemented.
295 */
296
297#define ATI_DESC_LIST_SIZE \
298 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
299
300/*
301 * build packets ring for the given buffer size.
302 *
303 * IXP handles the buffer descriptors, which are connected as a linked
304 * list. although we can change the list dynamically, in this version,
305 * a static RING of buffer descriptors is used.
306 *
307 * the ring is built in this function, and is set up to the hardware.
308 */
309static int atiixp_build_dma_packets(struct atiixp_modem *chip,
310 struct atiixp_dma *dma,
311 struct snd_pcm_substream *substream,
312 unsigned int periods,
313 unsigned int period_bytes)
314{
315 unsigned int i;
316 u32 addr, desc_addr;
317
318 if (periods > ATI_MAX_DESCRIPTORS)
319 return -ENOMEM;
320
321 if (dma->desc_buf.area == NULL) {
322 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev: &chip->pci->dev,
323 ATI_DESC_LIST_SIZE, dmab: &dma->desc_buf) < 0)
324 return -ENOMEM;
325 dma->period_bytes = dma->periods = 0; /* clear */
326 }
327
328 if (dma->periods == periods && dma->period_bytes == period_bytes)
329 return 0;
330
331 /* reset DMA before changing the descriptor table */
332 scoped_guard(spinlock_irqsave, &chip->reg_lock) {
333 writel(val: 0, addr: chip->remap_addr + dma->ops->llp_offset);
334 dma->ops->enable_dma(chip, 0);
335 dma->ops->enable_dma(chip, 1);
336 }
337
338 /* fill the entries */
339 addr = (u32)substream->runtime->dma_addr;
340 desc_addr = (u32)dma->desc_buf.addr;
341 for (i = 0; i < periods; i++) {
342 struct atiixp_dma_desc *desc;
343 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
344 desc->addr = cpu_to_le32(addr);
345 desc->status = 0;
346 desc->size = period_bytes >> 2; /* in dwords */
347 desc_addr += sizeof(struct atiixp_dma_desc);
348 if (i == periods - 1)
349 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
350 else
351 desc->next = cpu_to_le32(desc_addr);
352 addr += period_bytes;
353 }
354
355 writel(val: (u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
356 addr: chip->remap_addr + dma->ops->llp_offset);
357
358 dma->period_bytes = period_bytes;
359 dma->periods = periods;
360
361 return 0;
362}
363
364/*
365 * remove the ring buffer and release it if assigned
366 */
367static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
368 struct atiixp_dma *dma,
369 struct snd_pcm_substream *substream)
370{
371 if (dma->desc_buf.area) {
372 writel(val: 0, addr: chip->remap_addr + dma->ops->llp_offset);
373 snd_dma_free_pages(dmab: &dma->desc_buf);
374 dma->desc_buf.area = NULL;
375 }
376}
377
378/*
379 * AC97 interface
380 */
381static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
382{
383 int timeout = 1000;
384
385 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
386 if (! timeout--) {
387 dev_warn(chip->card->dev, "codec acquire timeout\n");
388 return -EBUSY;
389 }
390 udelay(usec: 1);
391 }
392 return 0;
393}
394
395static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
396 unsigned short codec,
397 unsigned short reg)
398{
399 unsigned int data;
400 int timeout;
401
402 if (snd_atiixp_acquire_codec(chip) < 0)
403 return 0xffff;
404 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
405 ATI_REG_PHYS_OUT_ADDR_EN |
406 ATI_REG_PHYS_OUT_RW |
407 codec;
408 atiixp_write(chip, PHYS_OUT_ADDR, data);
409 if (snd_atiixp_acquire_codec(chip) < 0)
410 return 0xffff;
411 timeout = 1000;
412 do {
413 data = atiixp_read(chip, PHYS_IN_ADDR);
414 if (data & ATI_REG_PHYS_IN_READ_FLAG)
415 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
416 udelay(usec: 1);
417 } while (--timeout);
418 /* time out may happen during reset */
419 if (reg < 0x7c)
420 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
421 return 0xffff;
422}
423
424
425static void snd_atiixp_codec_write(struct atiixp_modem *chip,
426 unsigned short codec,
427 unsigned short reg, unsigned short val)
428{
429 unsigned int data;
430
431 if (snd_atiixp_acquire_codec(chip) < 0)
432 return;
433 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
434 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
435 ATI_REG_PHYS_OUT_ADDR_EN | codec;
436 atiixp_write(chip, PHYS_OUT_ADDR, data);
437}
438
439
440static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
441 unsigned short reg)
442{
443 struct atiixp_modem *chip = ac97->private_data;
444 return snd_atiixp_codec_read(chip, codec: ac97->num, reg);
445
446}
447
448static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
449 unsigned short val)
450{
451 struct atiixp_modem *chip = ac97->private_data;
452 if (reg == AC97_GPIO_STATUS) {
453 atiixp_write(chip, MODEM_OUT_GPIO,
454 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
455 return;
456 }
457 snd_atiixp_codec_write(chip, codec: ac97->num, reg, val);
458}
459
460/*
461 * reset AC link
462 */
463static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
464{
465 int timeout;
466
467 /* reset powerdoewn */
468 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
469 udelay(usec: 10);
470
471 /* perform a software reset */
472 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
473 atiixp_read(chip, CMD);
474 udelay(usec: 10);
475 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
476
477 timeout = 10;
478 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
479 /* do a hard reset */
480 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
481 ATI_REG_CMD_AC_SYNC);
482 atiixp_read(chip, CMD);
483 msleep(msecs: 1);
484 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
485 if (!--timeout) {
486 dev_err(chip->card->dev, "codec reset timeout\n");
487 break;
488 }
489 }
490
491 /* deassert RESET and assert SYNC to make sure */
492 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
493 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
494
495 return 0;
496}
497
498static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
499{
500 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
501 // return -EBUSY;
502 atiixp_update(chip, CMD,
503 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
504 ATI_REG_CMD_POWERDOWN);
505 return 0;
506}
507
508/*
509 * auto-detection of codecs
510 *
511 * the IXP chip can generate interrupts for the non-existing codecs.
512 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
513 * even if all three codecs are connected.
514 */
515
516#define ALL_CODEC_NOT_READY \
517 (ATI_REG_ISR_CODEC0_NOT_READY |\
518 ATI_REG_ISR_CODEC1_NOT_READY |\
519 ATI_REG_ISR_CODEC2_NOT_READY)
520#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
521
522static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
523{
524 int timeout;
525
526 chip->codec_not_ready_bits = 0;
527 atiixp_write(chip, IER, CODEC_CHECK_BITS);
528 /* wait for the interrupts */
529 timeout = 50;
530 while (timeout-- > 0) {
531 msleep(msecs: 1);
532 if (chip->codec_not_ready_bits)
533 break;
534 }
535 atiixp_write(chip, IER, 0); /* disable irqs */
536
537 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
538 dev_err(chip->card->dev, "no codec detected!\n");
539 return -ENXIO;
540 }
541 return 0;
542}
543
544
545/*
546 * enable DMA and irqs
547 */
548static int snd_atiixp_chip_start(struct atiixp_modem *chip)
549{
550 unsigned int reg;
551
552 /* set up spdif, enable burst mode */
553 reg = atiixp_read(chip, CMD);
554 reg |= ATI_REG_CMD_BURST_EN;
555 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
556 reg |= ATI_REG_CMD_MODEM_PRESENT;
557 atiixp_write(chip, CMD, reg);
558
559 /* clear all interrupt source */
560 atiixp_write(chip, ISR, 0xffffffff);
561 /* enable irqs */
562 atiixp_write(chip, IER,
563 ATI_REG_IER_MODEM_STATUS_EN |
564 ATI_REG_IER_MODEM_IN_XRUN_EN |
565 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
566 return 0;
567}
568
569
570/*
571 * disable DMA and IRQs
572 */
573static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
574{
575 /* clear interrupt source */
576 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
577 /* disable irqs */
578 atiixp_write(chip, IER, 0);
579 return 0;
580}
581
582
583/*
584 * PCM section
585 */
586
587/*
588 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
589 * position. when SG-buffer is implemented, the offset must be calculated
590 * correctly...
591 */
592static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
593{
594 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
595 struct snd_pcm_runtime *runtime = substream->runtime;
596 struct atiixp_dma *dma = runtime->private_data;
597 unsigned int curptr;
598 int timeout = 1000;
599
600 while (timeout--) {
601 curptr = readl(addr: chip->remap_addr + dma->ops->dt_cur);
602 if (curptr < dma->buf_addr)
603 continue;
604 curptr -= dma->buf_addr;
605 if (curptr >= dma->buf_bytes)
606 continue;
607 return bytes_to_frames(runtime, size: curptr);
608 }
609 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
610 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
611 return 0;
612}
613
614/*
615 * XRUN detected, and stop the PCM substream
616 */
617static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
618 struct atiixp_dma *dma)
619{
620 if (! dma->substream || ! dma->running)
621 return;
622 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
623 snd_pcm_stop_xrun(substream: dma->substream);
624}
625
626/*
627 * the period ack. update the substream.
628 */
629static void snd_atiixp_update_dma(struct atiixp_modem *chip,
630 struct atiixp_dma *dma)
631{
632 if (! dma->substream || ! dma->running)
633 return;
634 snd_pcm_period_elapsed(substream: dma->substream);
635}
636
637/* set BUS_BUSY interrupt bit if any DMA is running */
638/* call with spinlock held */
639static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
640{
641 unsigned int bus_busy;
642 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
643 ATI_REG_CMD_MODEM_RECEIVE_EN))
644 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
645 else
646 bus_busy = 0;
647 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
648}
649
650/* common trigger callback
651 * calling the lowlevel callbacks in it
652 */
653static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
654{
655 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
656 struct atiixp_dma *dma = substream->runtime->private_data;
657 int err = 0;
658
659 if (snd_BUG_ON(!dma->ops->enable_transfer ||
660 !dma->ops->flush_dma))
661 return -EINVAL;
662
663 guard(spinlock)(l: &chip->reg_lock);
664 switch(cmd) {
665 case SNDRV_PCM_TRIGGER_START:
666 dma->ops->enable_transfer(chip, 1);
667 dma->running = 1;
668 break;
669 case SNDRV_PCM_TRIGGER_STOP:
670 dma->ops->enable_transfer(chip, 0);
671 dma->running = 0;
672 break;
673 default:
674 err = -EINVAL;
675 break;
676 }
677 if (! err) {
678 snd_atiixp_check_bus_busy(chip);
679 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
680 dma->ops->flush_dma(chip);
681 snd_atiixp_check_bus_busy(chip);
682 }
683 }
684 return err;
685}
686
687
688/*
689 * lowlevel callbacks for each DMA type
690 *
691 * every callback is supposed to be called in chip->reg_lock spinlock
692 */
693
694/* flush FIFO of analog OUT DMA */
695static void atiixp_out_flush_dma(struct atiixp_modem *chip)
696{
697 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
698}
699
700/* enable/disable analog OUT DMA */
701static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
702{
703 unsigned int data;
704 data = atiixp_read(chip, CMD);
705 if (on) {
706 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
707 return;
708 atiixp_out_flush_dma(chip);
709 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
710 } else
711 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
712 atiixp_write(chip, CMD, data);
713}
714
715/* start/stop transfer over OUT DMA */
716static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
717{
718 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
719 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
720}
721
722/* enable/disable analog IN DMA */
723static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
724{
725 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
726 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
727}
728
729/* start/stop analog IN DMA */
730static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
731{
732 if (on) {
733 unsigned int data = atiixp_read(chip, CMD);
734 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
735 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
736 atiixp_write(chip, CMD, data);
737 }
738 } else
739 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
740}
741
742/* flush FIFO of analog IN DMA */
743static void atiixp_in_flush_dma(struct atiixp_modem *chip)
744{
745 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
746}
747
748/* set up slots and formats for analog OUT */
749static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
750{
751 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
752 unsigned int data;
753
754 guard(spinlock_irq)(l: &chip->reg_lock);
755 /* set output threshold */
756 data = atiixp_read(chip, MODEM_OUT_FIFO);
757 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
758 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
759 atiixp_write(chip, MODEM_OUT_FIFO, data);
760 return 0;
761}
762
763/* set up slots and formats for analog IN */
764static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
765{
766 return 0;
767}
768
769/*
770 * hw_params - allocate the buffer and set up buffer descriptors
771 */
772static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
773 struct snd_pcm_hw_params *hw_params)
774{
775 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
776 struct atiixp_dma *dma = substream->runtime->private_data;
777 int err;
778 int i;
779
780 dma->buf_addr = substream->runtime->dma_addr;
781 dma->buf_bytes = params_buffer_bytes(p: hw_params);
782
783 err = atiixp_build_dma_packets(chip, dma, substream,
784 periods: params_periods(p: hw_params),
785 period_bytes: params_period_bytes(p: hw_params));
786 if (err < 0)
787 return err;
788
789 /* set up modem rate */
790 for (i = 0; i < NUM_ATI_CODECS; i++) {
791 if (! chip->ac97[i])
792 continue;
793 snd_ac97_write(ac97: chip->ac97[i], AC97_LINE1_RATE, value: params_rate(p: hw_params));
794 snd_ac97_write(ac97: chip->ac97[i], AC97_LINE1_LEVEL, value: 0);
795 }
796
797 return err;
798}
799
800static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
801{
802 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
803 struct atiixp_dma *dma = substream->runtime->private_data;
804
805 atiixp_clear_dma_packets(chip, dma, substream);
806 return 0;
807}
808
809
810/*
811 * pcm hardware definition, identical for all DMA types
812 */
813static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
814{
815 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
816 SNDRV_PCM_INFO_BLOCK_TRANSFER |
817 SNDRV_PCM_INFO_MMAP_VALID),
818 .formats = SNDRV_PCM_FMTBIT_S16_LE,
819 .rates = (SNDRV_PCM_RATE_8000 |
820 SNDRV_PCM_RATE_16000 |
821 SNDRV_PCM_RATE_KNOT),
822 .rate_min = 8000,
823 .rate_max = 16000,
824 .channels_min = 2,
825 .channels_max = 2,
826 .buffer_bytes_max = 256 * 1024,
827 .period_bytes_min = 32,
828 .period_bytes_max = 128 * 1024,
829 .periods_min = 2,
830 .periods_max = ATI_MAX_DESCRIPTORS,
831};
832
833static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
834 struct atiixp_dma *dma, int pcm_type)
835{
836 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
837 struct snd_pcm_runtime *runtime = substream->runtime;
838 int err;
839 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
840 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
841 .count = ARRAY_SIZE(rates),
842 .list = rates,
843 .mask = 0,
844 };
845
846 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
847 return -EINVAL;
848
849 if (dma->opened)
850 return -EBUSY;
851 dma->substream = substream;
852 runtime->hw = snd_atiixp_pcm_hw;
853 dma->ac97_pcm_type = pcm_type;
854 err = snd_pcm_hw_constraint_list(runtime, cond: 0, SNDRV_PCM_HW_PARAM_RATE,
855 l: &hw_constraints_rates);
856 if (err < 0)
857 return err;
858 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
859 if (err < 0)
860 return err;
861 runtime->private_data = dma;
862
863 /* enable DMA bits */
864 scoped_guard(spinlock_irq, &chip->reg_lock) {
865 dma->ops->enable_dma(chip, 1);
866 }
867 dma->opened = 1;
868
869 return 0;
870}
871
872static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
873 struct atiixp_dma *dma)
874{
875 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
876 /* disable DMA bits */
877 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
878 return -EINVAL;
879 scoped_guard(spinlock_irq, &chip->reg_lock) {
880 dma->ops->enable_dma(chip, 0);
881 }
882 dma->substream = NULL;
883 dma->opened = 0;
884 return 0;
885}
886
887/*
888 */
889static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
890{
891 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
892
893 guard(mutex)(T: &chip->open_mutex);
894 return snd_atiixp_pcm_open(substream, dma: &chip->dmas[ATI_DMA_PLAYBACK], pcm_type: 0);
895}
896
897static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
898{
899 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
900
901 guard(mutex)(T: &chip->open_mutex);
902 return snd_atiixp_pcm_close(substream, dma: &chip->dmas[ATI_DMA_PLAYBACK]);
903}
904
905static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
906{
907 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
908 return snd_atiixp_pcm_open(substream, dma: &chip->dmas[ATI_DMA_CAPTURE], pcm_type: 1);
909}
910
911static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
912{
913 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
914 return snd_atiixp_pcm_close(substream, dma: &chip->dmas[ATI_DMA_CAPTURE]);
915}
916
917
918/* AC97 playback */
919static const struct snd_pcm_ops snd_atiixp_playback_ops = {
920 .open = snd_atiixp_playback_open,
921 .close = snd_atiixp_playback_close,
922 .hw_params = snd_atiixp_pcm_hw_params,
923 .hw_free = snd_atiixp_pcm_hw_free,
924 .prepare = snd_atiixp_playback_prepare,
925 .trigger = snd_atiixp_pcm_trigger,
926 .pointer = snd_atiixp_pcm_pointer,
927};
928
929/* AC97 capture */
930static const struct snd_pcm_ops snd_atiixp_capture_ops = {
931 .open = snd_atiixp_capture_open,
932 .close = snd_atiixp_capture_close,
933 .hw_params = snd_atiixp_pcm_hw_params,
934 .hw_free = snd_atiixp_pcm_hw_free,
935 .prepare = snd_atiixp_capture_prepare,
936 .trigger = snd_atiixp_pcm_trigger,
937 .pointer = snd_atiixp_pcm_pointer,
938};
939
940static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
941 .type = ATI_DMA_PLAYBACK,
942 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
943 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
944 .enable_dma = atiixp_out_enable_dma,
945 .enable_transfer = atiixp_out_enable_transfer,
946 .flush_dma = atiixp_out_flush_dma,
947};
948
949static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
950 .type = ATI_DMA_CAPTURE,
951 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
952 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
953 .enable_dma = atiixp_in_enable_dma,
954 .enable_transfer = atiixp_in_enable_transfer,
955 .flush_dma = atiixp_in_flush_dma,
956};
957
958static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
959{
960 struct snd_pcm *pcm;
961 int err;
962
963 /* initialize constants */
964 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
965 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
966
967 /* PCM #0: analog I/O */
968 err = snd_pcm_new(card: chip->card, id: "ATI IXP MC97", device: ATI_PCMDEV_ANALOG, playback_count: 1, capture_count: 1, rpcm: &pcm);
969 if (err < 0)
970 return err;
971 snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &snd_atiixp_playback_ops);
972 snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_CAPTURE, ops: &snd_atiixp_capture_ops);
973 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
974 pcm->private_data = chip;
975 strscpy(pcm->name, "ATI IXP MC97");
976 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
977
978 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
979 data: &chip->pci->dev, size: 64*1024, max: 128*1024);
980
981 return 0;
982}
983
984
985
986/*
987 * interrupt handler
988 */
989static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
990{
991 struct atiixp_modem *chip = dev_id;
992 unsigned int status;
993
994 status = atiixp_read(chip, ISR);
995
996 if (! status)
997 return IRQ_NONE;
998
999 /* process audio DMA */
1000 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1001 snd_atiixp_xrun_dma(chip, dma: &chip->dmas[ATI_DMA_PLAYBACK]);
1002 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1003 snd_atiixp_update_dma(chip, dma: &chip->dmas[ATI_DMA_PLAYBACK]);
1004 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1005 snd_atiixp_xrun_dma(chip, dma: &chip->dmas[ATI_DMA_CAPTURE]);
1006 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1007 snd_atiixp_update_dma(chip, dma: &chip->dmas[ATI_DMA_CAPTURE]);
1008
1009 /* for codec detection */
1010 if (status & CODEC_CHECK_BITS) {
1011 unsigned int detected;
1012 detected = status & CODEC_CHECK_BITS;
1013 guard(spinlock)(l: &chip->reg_lock);
1014 chip->codec_not_ready_bits |= detected;
1015 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1016 }
1017
1018 /* ack */
1019 atiixp_write(chip, ISR, status);
1020
1021 return IRQ_HANDLED;
1022}
1023
1024
1025/*
1026 * ac97 mixer section
1027 */
1028
1029static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1030{
1031 struct snd_ac97_bus *pbus;
1032 struct snd_ac97_template ac97;
1033 int i, err;
1034 int codec_count;
1035 static const struct snd_ac97_bus_ops ops = {
1036 .write = snd_atiixp_ac97_write,
1037 .read = snd_atiixp_ac97_read,
1038 };
1039 static const unsigned int codec_skip[NUM_ATI_CODECS] = {
1040 ATI_REG_ISR_CODEC0_NOT_READY,
1041 ATI_REG_ISR_CODEC1_NOT_READY,
1042 ATI_REG_ISR_CODEC2_NOT_READY,
1043 };
1044
1045 if (snd_atiixp_codec_detect(chip) < 0)
1046 return -ENXIO;
1047
1048 err = snd_ac97_bus(card: chip->card, num: 0, ops: &ops, private_data: chip, rbus: &pbus);
1049 if (err < 0)
1050 return err;
1051 pbus->clock = clock;
1052 chip->ac97_bus = pbus;
1053
1054 codec_count = 0;
1055 for (i = 0; i < NUM_ATI_CODECS; i++) {
1056 if (chip->codec_not_ready_bits & codec_skip[i])
1057 continue;
1058 memset(&ac97, 0, sizeof(ac97));
1059 ac97.private_data = chip;
1060 ac97.pci = chip->pci;
1061 ac97.num = i;
1062 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1063 err = snd_ac97_mixer(bus: pbus, template: &ac97, rac97: &chip->ac97[i]);
1064 if (err < 0) {
1065 chip->ac97[i] = NULL; /* to be sure */
1066 dev_dbg(chip->card->dev,
1067 "codec %d not available for modem\n", i);
1068 continue;
1069 }
1070 codec_count++;
1071 }
1072
1073 if (! codec_count) {
1074 dev_err(chip->card->dev, "no codec available\n");
1075 return -ENODEV;
1076 }
1077
1078 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1079
1080 return 0;
1081}
1082
1083
1084/*
1085 * power management
1086 */
1087static int snd_atiixp_suspend(struct device *dev)
1088{
1089 struct snd_card *card = dev_get_drvdata(dev);
1090 struct atiixp_modem *chip = card->private_data;
1091 int i;
1092
1093 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1094 for (i = 0; i < NUM_ATI_CODECS; i++)
1095 snd_ac97_suspend(ac97: chip->ac97[i]);
1096 snd_atiixp_aclink_down(chip);
1097 snd_atiixp_chip_stop(chip);
1098 return 0;
1099}
1100
1101static int snd_atiixp_resume(struct device *dev)
1102{
1103 struct snd_card *card = dev_get_drvdata(dev);
1104 struct atiixp_modem *chip = card->private_data;
1105 int i;
1106
1107 snd_atiixp_aclink_reset(chip);
1108 snd_atiixp_chip_start(chip);
1109
1110 for (i = 0; i < NUM_ATI_CODECS; i++)
1111 snd_ac97_resume(ac97: chip->ac97[i]);
1112
1113 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1114 return 0;
1115}
1116
1117static DEFINE_SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1118
1119/*
1120 * proc interface for register dump
1121 */
1122
1123static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1124 struct snd_info_buffer *buffer)
1125{
1126 struct atiixp_modem *chip = entry->private_data;
1127 int i;
1128
1129 for (i = 0; i < 256; i += 4)
1130 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1131}
1132
1133static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1134{
1135 snd_card_ro_proc_new(card: chip->card, name: "atiixp-modem", private_data: chip,
1136 read: snd_atiixp_proc_read);
1137}
1138
1139
1140/*
1141 * destructor
1142 */
1143
1144static void snd_atiixp_free(struct snd_card *card)
1145{
1146 snd_atiixp_chip_stop(chip: card->private_data);
1147}
1148
1149/*
1150 * constructor for chip instance
1151 */
1152static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci)
1153{
1154 struct atiixp_modem *chip = card->private_data;
1155 int err;
1156
1157 err = pcim_enable_device(pdev: pci);
1158 if (err < 0)
1159 return err;
1160
1161 spin_lock_init(&chip->reg_lock);
1162 mutex_init(&chip->open_mutex);
1163 chip->card = card;
1164 chip->pci = pci;
1165 chip->irq = -1;
1166 chip->remap_addr = pcim_iomap_region(pdev: pci, bar: 0, name: "ATI IXP MC97");
1167 if (IS_ERR(ptr: chip->remap_addr))
1168 return PTR_ERR(ptr: chip->remap_addr);
1169 chip->addr = pci_resource_start(pci, 0);
1170
1171 if (devm_request_irq(dev: &pci->dev, irq: pci->irq, handler: snd_atiixp_interrupt,
1172 IRQF_SHARED, KBUILD_MODNAME, dev_id: chip)) {
1173 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1174 return -EBUSY;
1175 }
1176 chip->irq = pci->irq;
1177 card->sync_irq = chip->irq;
1178 card->private_free = snd_atiixp_free;
1179 pci_set_master(dev: pci);
1180
1181 return 0;
1182}
1183
1184
1185static int __snd_atiixp_probe(struct pci_dev *pci,
1186 const struct pci_device_id *pci_id)
1187{
1188 struct snd_card *card;
1189 struct atiixp_modem *chip;
1190 int err;
1191
1192 err = snd_devm_card_new(parent: &pci->dev, idx: index, xid: id, THIS_MODULE,
1193 extra_size: sizeof(*chip), card_ret: &card);
1194 if (err < 0)
1195 return err;
1196 chip = card->private_data;
1197
1198 strscpy(card->driver, "ATIIXP-MODEM");
1199 strscpy(card->shortname, "ATI IXP Modem");
1200 err = snd_atiixp_init(card, pci);
1201 if (err < 0)
1202 return err;
1203
1204 err = snd_atiixp_aclink_reset(chip);
1205 if (err < 0)
1206 return err;
1207
1208 err = snd_atiixp_mixer_new(chip, clock: ac97_clock);
1209 if (err < 0)
1210 return err;
1211
1212 err = snd_atiixp_pcm_new(chip);
1213 if (err < 0)
1214 return err;
1215
1216 snd_atiixp_proc_init(chip);
1217
1218 snd_atiixp_chip_start(chip);
1219
1220 sprintf(buf: card->longname, fmt: "%s rev %x at 0x%lx, irq %i",
1221 card->shortname, pci->revision, chip->addr, chip->irq);
1222
1223 err = snd_card_register(card);
1224 if (err < 0)
1225 return err;
1226
1227 pci_set_drvdata(pdev: pci, data: card);
1228 return 0;
1229}
1230
1231static int snd_atiixp_probe(struct pci_dev *pci,
1232 const struct pci_device_id *pci_id)
1233{
1234 return snd_card_free_on_error(dev: &pci->dev, ret: __snd_atiixp_probe(pci, pci_id));
1235}
1236
1237static struct pci_driver atiixp_modem_driver = {
1238 .name = KBUILD_MODNAME,
1239 .id_table = snd_atiixp_ids,
1240 .probe = snd_atiixp_probe,
1241 .driver = {
1242 .pm = &snd_atiixp_pm,
1243 },
1244};
1245
1246module_pci_driver(atiixp_modem_driver);
1247

source code of linux/sound/pci/atiixp_modem.c