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 unsigned long flags;
318
319 if (periods > ATI_MAX_DESCRIPTORS)
320 return -ENOMEM;
321
322 if (dma->desc_buf.area == NULL) {
323 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev: &chip->pci->dev,
324 ATI_DESC_LIST_SIZE, dmab: &dma->desc_buf) < 0)
325 return -ENOMEM;
326 dma->period_bytes = dma->periods = 0; /* clear */
327 }
328
329 if (dma->periods == periods && dma->period_bytes == period_bytes)
330 return 0;
331
332 /* reset DMA before changing the descriptor table */
333 spin_lock_irqsave(&chip->reg_lock, flags);
334 writel(val: 0, addr: chip->remap_addr + dma->ops->llp_offset);
335 dma->ops->enable_dma(chip, 0);
336 dma->ops->enable_dma(chip, 1);
337 spin_unlock_irqrestore(lock: &chip->reg_lock, flags);
338
339 /* fill the entries */
340 addr = (u32)substream->runtime->dma_addr;
341 desc_addr = (u32)dma->desc_buf.addr;
342 for (i = 0; i < periods; i++) {
343 struct atiixp_dma_desc *desc;
344 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
345 desc->addr = cpu_to_le32(addr);
346 desc->status = 0;
347 desc->size = period_bytes >> 2; /* in dwords */
348 desc_addr += sizeof(struct atiixp_dma_desc);
349 if (i == periods - 1)
350 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
351 else
352 desc->next = cpu_to_le32(desc_addr);
353 addr += period_bytes;
354 }
355
356 writel(val: (u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
357 addr: chip->remap_addr + dma->ops->llp_offset);
358
359 dma->period_bytes = period_bytes;
360 dma->periods = periods;
361
362 return 0;
363}
364
365/*
366 * remove the ring buffer and release it if assigned
367 */
368static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
369 struct atiixp_dma *dma,
370 struct snd_pcm_substream *substream)
371{
372 if (dma->desc_buf.area) {
373 writel(val: 0, addr: chip->remap_addr + dma->ops->llp_offset);
374 snd_dma_free_pages(dmab: &dma->desc_buf);
375 dma->desc_buf.area = NULL;
376 }
377}
378
379/*
380 * AC97 interface
381 */
382static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
383{
384 int timeout = 1000;
385
386 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
387 if (! timeout--) {
388 dev_warn(chip->card->dev, "codec acquire timeout\n");
389 return -EBUSY;
390 }
391 udelay(1);
392 }
393 return 0;
394}
395
396static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
397 unsigned short codec,
398 unsigned short reg)
399{
400 unsigned int data;
401 int timeout;
402
403 if (snd_atiixp_acquire_codec(chip) < 0)
404 return 0xffff;
405 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
406 ATI_REG_PHYS_OUT_ADDR_EN |
407 ATI_REG_PHYS_OUT_RW |
408 codec;
409 atiixp_write(chip, PHYS_OUT_ADDR, data);
410 if (snd_atiixp_acquire_codec(chip) < 0)
411 return 0xffff;
412 timeout = 1000;
413 do {
414 data = atiixp_read(chip, PHYS_IN_ADDR);
415 if (data & ATI_REG_PHYS_IN_READ_FLAG)
416 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
417 udelay(1);
418 } while (--timeout);
419 /* time out may happen during reset */
420 if (reg < 0x7c)
421 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
422 return 0xffff;
423}
424
425
426static void snd_atiixp_codec_write(struct atiixp_modem *chip,
427 unsigned short codec,
428 unsigned short reg, unsigned short val)
429{
430 unsigned int data;
431
432 if (snd_atiixp_acquire_codec(chip) < 0)
433 return;
434 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
435 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
436 ATI_REG_PHYS_OUT_ADDR_EN | codec;
437 atiixp_write(chip, PHYS_OUT_ADDR, data);
438}
439
440
441static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
442 unsigned short reg)
443{
444 struct atiixp_modem *chip = ac97->private_data;
445 return snd_atiixp_codec_read(chip, codec: ac97->num, reg);
446
447}
448
449static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
450 unsigned short val)
451{
452 struct atiixp_modem *chip = ac97->private_data;
453 if (reg == AC97_GPIO_STATUS) {
454 atiixp_write(chip, MODEM_OUT_GPIO,
455 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
456 return;
457 }
458 snd_atiixp_codec_write(chip, codec: ac97->num, reg, val);
459}
460
461/*
462 * reset AC link
463 */
464static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
465{
466 int timeout;
467
468 /* reset powerdoewn */
469 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
470 udelay(10);
471
472 /* perform a software reset */
473 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
474 atiixp_read(chip, CMD);
475 udelay(10);
476 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
477
478 timeout = 10;
479 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
480 /* do a hard reset */
481 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
482 ATI_REG_CMD_AC_SYNC);
483 atiixp_read(chip, CMD);
484 msleep(msecs: 1);
485 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
486 if (!--timeout) {
487 dev_err(chip->card->dev, "codec reset timeout\n");
488 break;
489 }
490 }
491
492 /* deassert RESET and assert SYNC to make sure */
493 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
494 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
495
496 return 0;
497}
498
499#ifdef CONFIG_PM_SLEEP
500static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
501{
502 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
503 // return -EBUSY;
504 atiixp_update(chip, CMD,
505 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
506 ATI_REG_CMD_POWERDOWN);
507 return 0;
508}
509#endif
510
511/*
512 * auto-detection of codecs
513 *
514 * the IXP chip can generate interrupts for the non-existing codecs.
515 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
516 * even if all three codecs are connected.
517 */
518
519#define ALL_CODEC_NOT_READY \
520 (ATI_REG_ISR_CODEC0_NOT_READY |\
521 ATI_REG_ISR_CODEC1_NOT_READY |\
522 ATI_REG_ISR_CODEC2_NOT_READY)
523#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
524
525static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
526{
527 int timeout;
528
529 chip->codec_not_ready_bits = 0;
530 atiixp_write(chip, IER, CODEC_CHECK_BITS);
531 /* wait for the interrupts */
532 timeout = 50;
533 while (timeout-- > 0) {
534 msleep(msecs: 1);
535 if (chip->codec_not_ready_bits)
536 break;
537 }
538 atiixp_write(chip, IER, 0); /* disable irqs */
539
540 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
541 dev_err(chip->card->dev, "no codec detected!\n");
542 return -ENXIO;
543 }
544 return 0;
545}
546
547
548/*
549 * enable DMA and irqs
550 */
551static int snd_atiixp_chip_start(struct atiixp_modem *chip)
552{
553 unsigned int reg;
554
555 /* set up spdif, enable burst mode */
556 reg = atiixp_read(chip, CMD);
557 reg |= ATI_REG_CMD_BURST_EN;
558 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
559 reg |= ATI_REG_CMD_MODEM_PRESENT;
560 atiixp_write(chip, CMD, reg);
561
562 /* clear all interrupt source */
563 atiixp_write(chip, ISR, 0xffffffff);
564 /* enable irqs */
565 atiixp_write(chip, IER,
566 ATI_REG_IER_MODEM_STATUS_EN |
567 ATI_REG_IER_MODEM_IN_XRUN_EN |
568 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
569 return 0;
570}
571
572
573/*
574 * disable DMA and IRQs
575 */
576static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
577{
578 /* clear interrupt source */
579 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
580 /* disable irqs */
581 atiixp_write(chip, IER, 0);
582 return 0;
583}
584
585
586/*
587 * PCM section
588 */
589
590/*
591 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
592 * position. when SG-buffer is implemented, the offset must be calculated
593 * correctly...
594 */
595static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
596{
597 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
598 struct snd_pcm_runtime *runtime = substream->runtime;
599 struct atiixp_dma *dma = runtime->private_data;
600 unsigned int curptr;
601 int timeout = 1000;
602
603 while (timeout--) {
604 curptr = readl(addr: chip->remap_addr + dma->ops->dt_cur);
605 if (curptr < dma->buf_addr)
606 continue;
607 curptr -= dma->buf_addr;
608 if (curptr >= dma->buf_bytes)
609 continue;
610 return bytes_to_frames(runtime, size: curptr);
611 }
612 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
613 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
614 return 0;
615}
616
617/*
618 * XRUN detected, and stop the PCM substream
619 */
620static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
621 struct atiixp_dma *dma)
622{
623 if (! dma->substream || ! dma->running)
624 return;
625 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
626 snd_pcm_stop_xrun(substream: dma->substream);
627}
628
629/*
630 * the period ack. update the substream.
631 */
632static void snd_atiixp_update_dma(struct atiixp_modem *chip,
633 struct atiixp_dma *dma)
634{
635 if (! dma->substream || ! dma->running)
636 return;
637 snd_pcm_period_elapsed(substream: dma->substream);
638}
639
640/* set BUS_BUSY interrupt bit if any DMA is running */
641/* call with spinlock held */
642static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
643{
644 unsigned int bus_busy;
645 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
646 ATI_REG_CMD_MODEM_RECEIVE_EN))
647 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
648 else
649 bus_busy = 0;
650 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
651}
652
653/* common trigger callback
654 * calling the lowlevel callbacks in it
655 */
656static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
657{
658 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
659 struct atiixp_dma *dma = substream->runtime->private_data;
660 int err = 0;
661
662 if (snd_BUG_ON(!dma->ops->enable_transfer ||
663 !dma->ops->flush_dma))
664 return -EINVAL;
665
666 spin_lock(lock: &chip->reg_lock);
667 switch(cmd) {
668 case SNDRV_PCM_TRIGGER_START:
669 dma->ops->enable_transfer(chip, 1);
670 dma->running = 1;
671 break;
672 case SNDRV_PCM_TRIGGER_STOP:
673 dma->ops->enable_transfer(chip, 0);
674 dma->running = 0;
675 break;
676 default:
677 err = -EINVAL;
678 break;
679 }
680 if (! err) {
681 snd_atiixp_check_bus_busy(chip);
682 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
683 dma->ops->flush_dma(chip);
684 snd_atiixp_check_bus_busy(chip);
685 }
686 }
687 spin_unlock(lock: &chip->reg_lock);
688 return err;
689}
690
691
692/*
693 * lowlevel callbacks for each DMA type
694 *
695 * every callback is supposed to be called in chip->reg_lock spinlock
696 */
697
698/* flush FIFO of analog OUT DMA */
699static void atiixp_out_flush_dma(struct atiixp_modem *chip)
700{
701 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
702}
703
704/* enable/disable analog OUT DMA */
705static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
706{
707 unsigned int data;
708 data = atiixp_read(chip, CMD);
709 if (on) {
710 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
711 return;
712 atiixp_out_flush_dma(chip);
713 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
714 } else
715 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
716 atiixp_write(chip, CMD, data);
717}
718
719/* start/stop transfer over OUT DMA */
720static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
721{
722 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
723 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
724}
725
726/* enable/disable analog IN DMA */
727static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
728{
729 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
730 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
731}
732
733/* start/stop analog IN DMA */
734static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
735{
736 if (on) {
737 unsigned int data = atiixp_read(chip, CMD);
738 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
739 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
740 atiixp_write(chip, CMD, data);
741 }
742 } else
743 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
744}
745
746/* flush FIFO of analog IN DMA */
747static void atiixp_in_flush_dma(struct atiixp_modem *chip)
748{
749 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
750}
751
752/* set up slots and formats for analog OUT */
753static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
754{
755 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
756 unsigned int data;
757
758 spin_lock_irq(lock: &chip->reg_lock);
759 /* set output threshold */
760 data = atiixp_read(chip, MODEM_OUT_FIFO);
761 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
762 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
763 atiixp_write(chip, MODEM_OUT_FIFO, data);
764 spin_unlock_irq(lock: &chip->reg_lock);
765 return 0;
766}
767
768/* set up slots and formats for analog IN */
769static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
770{
771 return 0;
772}
773
774/*
775 * hw_params - allocate the buffer and set up buffer descriptors
776 */
777static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
778 struct snd_pcm_hw_params *hw_params)
779{
780 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
781 struct atiixp_dma *dma = substream->runtime->private_data;
782 int err;
783 int i;
784
785 dma->buf_addr = substream->runtime->dma_addr;
786 dma->buf_bytes = params_buffer_bytes(p: hw_params);
787
788 err = atiixp_build_dma_packets(chip, dma, substream,
789 periods: params_periods(p: hw_params),
790 period_bytes: params_period_bytes(p: hw_params));
791 if (err < 0)
792 return err;
793
794 /* set up modem rate */
795 for (i = 0; i < NUM_ATI_CODECS; i++) {
796 if (! chip->ac97[i])
797 continue;
798 snd_ac97_write(ac97: chip->ac97[i], AC97_LINE1_RATE, value: params_rate(p: hw_params));
799 snd_ac97_write(ac97: chip->ac97[i], AC97_LINE1_LEVEL, value: 0);
800 }
801
802 return err;
803}
804
805static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
806{
807 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
808 struct atiixp_dma *dma = substream->runtime->private_data;
809
810 atiixp_clear_dma_packets(chip, dma, substream);
811 return 0;
812}
813
814
815/*
816 * pcm hardware definition, identical for all DMA types
817 */
818static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
819{
820 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
821 SNDRV_PCM_INFO_BLOCK_TRANSFER |
822 SNDRV_PCM_INFO_MMAP_VALID),
823 .formats = SNDRV_PCM_FMTBIT_S16_LE,
824 .rates = (SNDRV_PCM_RATE_8000 |
825 SNDRV_PCM_RATE_16000 |
826 SNDRV_PCM_RATE_KNOT),
827 .rate_min = 8000,
828 .rate_max = 16000,
829 .channels_min = 2,
830 .channels_max = 2,
831 .buffer_bytes_max = 256 * 1024,
832 .period_bytes_min = 32,
833 .period_bytes_max = 128 * 1024,
834 .periods_min = 2,
835 .periods_max = ATI_MAX_DESCRIPTORS,
836};
837
838static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
839 struct atiixp_dma *dma, int pcm_type)
840{
841 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
842 struct snd_pcm_runtime *runtime = substream->runtime;
843 int err;
844 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
845 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
846 .count = ARRAY_SIZE(rates),
847 .list = rates,
848 .mask = 0,
849 };
850
851 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
852 return -EINVAL;
853
854 if (dma->opened)
855 return -EBUSY;
856 dma->substream = substream;
857 runtime->hw = snd_atiixp_pcm_hw;
858 dma->ac97_pcm_type = pcm_type;
859 err = snd_pcm_hw_constraint_list(runtime, cond: 0, SNDRV_PCM_HW_PARAM_RATE,
860 l: &hw_constraints_rates);
861 if (err < 0)
862 return err;
863 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
864 if (err < 0)
865 return err;
866 runtime->private_data = dma;
867
868 /* enable DMA bits */
869 spin_lock_irq(lock: &chip->reg_lock);
870 dma->ops->enable_dma(chip, 1);
871 spin_unlock_irq(lock: &chip->reg_lock);
872 dma->opened = 1;
873
874 return 0;
875}
876
877static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
878 struct atiixp_dma *dma)
879{
880 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
881 /* disable DMA bits */
882 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
883 return -EINVAL;
884 spin_lock_irq(lock: &chip->reg_lock);
885 dma->ops->enable_dma(chip, 0);
886 spin_unlock_irq(lock: &chip->reg_lock);
887 dma->substream = NULL;
888 dma->opened = 0;
889 return 0;
890}
891
892/*
893 */
894static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
895{
896 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
897 int err;
898
899 mutex_lock(&chip->open_mutex);
900 err = snd_atiixp_pcm_open(substream, dma: &chip->dmas[ATI_DMA_PLAYBACK], pcm_type: 0);
901 mutex_unlock(lock: &chip->open_mutex);
902 if (err < 0)
903 return err;
904 return 0;
905}
906
907static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
908{
909 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
910 int err;
911 mutex_lock(&chip->open_mutex);
912 err = snd_atiixp_pcm_close(substream, dma: &chip->dmas[ATI_DMA_PLAYBACK]);
913 mutex_unlock(lock: &chip->open_mutex);
914 return err;
915}
916
917static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
918{
919 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
920 return snd_atiixp_pcm_open(substream, dma: &chip->dmas[ATI_DMA_CAPTURE], pcm_type: 1);
921}
922
923static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
924{
925 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
926 return snd_atiixp_pcm_close(substream, dma: &chip->dmas[ATI_DMA_CAPTURE]);
927}
928
929
930/* AC97 playback */
931static const struct snd_pcm_ops snd_atiixp_playback_ops = {
932 .open = snd_atiixp_playback_open,
933 .close = snd_atiixp_playback_close,
934 .hw_params = snd_atiixp_pcm_hw_params,
935 .hw_free = snd_atiixp_pcm_hw_free,
936 .prepare = snd_atiixp_playback_prepare,
937 .trigger = snd_atiixp_pcm_trigger,
938 .pointer = snd_atiixp_pcm_pointer,
939};
940
941/* AC97 capture */
942static const struct snd_pcm_ops snd_atiixp_capture_ops = {
943 .open = snd_atiixp_capture_open,
944 .close = snd_atiixp_capture_close,
945 .hw_params = snd_atiixp_pcm_hw_params,
946 .hw_free = snd_atiixp_pcm_hw_free,
947 .prepare = snd_atiixp_capture_prepare,
948 .trigger = snd_atiixp_pcm_trigger,
949 .pointer = snd_atiixp_pcm_pointer,
950};
951
952static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
953 .type = ATI_DMA_PLAYBACK,
954 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
955 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
956 .enable_dma = atiixp_out_enable_dma,
957 .enable_transfer = atiixp_out_enable_transfer,
958 .flush_dma = atiixp_out_flush_dma,
959};
960
961static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
962 .type = ATI_DMA_CAPTURE,
963 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
964 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
965 .enable_dma = atiixp_in_enable_dma,
966 .enable_transfer = atiixp_in_enable_transfer,
967 .flush_dma = atiixp_in_flush_dma,
968};
969
970static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
971{
972 struct snd_pcm *pcm;
973 int err;
974
975 /* initialize constants */
976 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
977 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
978
979 /* PCM #0: analog I/O */
980 err = snd_pcm_new(card: chip->card, id: "ATI IXP MC97", device: ATI_PCMDEV_ANALOG, playback_count: 1, capture_count: 1, rpcm: &pcm);
981 if (err < 0)
982 return err;
983 snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &snd_atiixp_playback_ops);
984 snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_CAPTURE, ops: &snd_atiixp_capture_ops);
985 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
986 pcm->private_data = chip;
987 strcpy(p: pcm->name, q: "ATI IXP MC97");
988 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
989
990 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
991 data: &chip->pci->dev, size: 64*1024, max: 128*1024);
992
993 return 0;
994}
995
996
997
998/*
999 * interrupt handler
1000 */
1001static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1002{
1003 struct atiixp_modem *chip = dev_id;
1004 unsigned int status;
1005
1006 status = atiixp_read(chip, ISR);
1007
1008 if (! status)
1009 return IRQ_NONE;
1010
1011 /* process audio DMA */
1012 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1013 snd_atiixp_xrun_dma(chip, dma: &chip->dmas[ATI_DMA_PLAYBACK]);
1014 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1015 snd_atiixp_update_dma(chip, dma: &chip->dmas[ATI_DMA_PLAYBACK]);
1016 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1017 snd_atiixp_xrun_dma(chip, dma: &chip->dmas[ATI_DMA_CAPTURE]);
1018 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1019 snd_atiixp_update_dma(chip, dma: &chip->dmas[ATI_DMA_CAPTURE]);
1020
1021 /* for codec detection */
1022 if (status & CODEC_CHECK_BITS) {
1023 unsigned int detected;
1024 detected = status & CODEC_CHECK_BITS;
1025 spin_lock(lock: &chip->reg_lock);
1026 chip->codec_not_ready_bits |= detected;
1027 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1028 spin_unlock(lock: &chip->reg_lock);
1029 }
1030
1031 /* ack */
1032 atiixp_write(chip, ISR, status);
1033
1034 return IRQ_HANDLED;
1035}
1036
1037
1038/*
1039 * ac97 mixer section
1040 */
1041
1042static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1043{
1044 struct snd_ac97_bus *pbus;
1045 struct snd_ac97_template ac97;
1046 int i, err;
1047 int codec_count;
1048 static const struct snd_ac97_bus_ops ops = {
1049 .write = snd_atiixp_ac97_write,
1050 .read = snd_atiixp_ac97_read,
1051 };
1052 static const unsigned int codec_skip[NUM_ATI_CODECS] = {
1053 ATI_REG_ISR_CODEC0_NOT_READY,
1054 ATI_REG_ISR_CODEC1_NOT_READY,
1055 ATI_REG_ISR_CODEC2_NOT_READY,
1056 };
1057
1058 if (snd_atiixp_codec_detect(chip) < 0)
1059 return -ENXIO;
1060
1061 err = snd_ac97_bus(card: chip->card, num: 0, ops: &ops, private_data: chip, rbus: &pbus);
1062 if (err < 0)
1063 return err;
1064 pbus->clock = clock;
1065 chip->ac97_bus = pbus;
1066
1067 codec_count = 0;
1068 for (i = 0; i < NUM_ATI_CODECS; i++) {
1069 if (chip->codec_not_ready_bits & codec_skip[i])
1070 continue;
1071 memset(&ac97, 0, sizeof(ac97));
1072 ac97.private_data = chip;
1073 ac97.pci = chip->pci;
1074 ac97.num = i;
1075 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1076 err = snd_ac97_mixer(bus: pbus, template: &ac97, rac97: &chip->ac97[i]);
1077 if (err < 0) {
1078 chip->ac97[i] = NULL; /* to be sure */
1079 dev_dbg(chip->card->dev,
1080 "codec %d not available for modem\n", i);
1081 continue;
1082 }
1083 codec_count++;
1084 }
1085
1086 if (! codec_count) {
1087 dev_err(chip->card->dev, "no codec available\n");
1088 return -ENODEV;
1089 }
1090
1091 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1092
1093 return 0;
1094}
1095
1096
1097#ifdef CONFIG_PM_SLEEP
1098/*
1099 * power management
1100 */
1101static int snd_atiixp_suspend(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_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1108 for (i = 0; i < NUM_ATI_CODECS; i++)
1109 snd_ac97_suspend(ac97: chip->ac97[i]);
1110 snd_atiixp_aclink_down(chip);
1111 snd_atiixp_chip_stop(chip);
1112 return 0;
1113}
1114
1115static int snd_atiixp_resume(struct device *dev)
1116{
1117 struct snd_card *card = dev_get_drvdata(dev);
1118 struct atiixp_modem *chip = card->private_data;
1119 int i;
1120
1121 snd_atiixp_aclink_reset(chip);
1122 snd_atiixp_chip_start(chip);
1123
1124 for (i = 0; i < NUM_ATI_CODECS; i++)
1125 snd_ac97_resume(ac97: chip->ac97[i]);
1126
1127 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1128 return 0;
1129}
1130
1131static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1132#define SND_ATIIXP_PM_OPS &snd_atiixp_pm
1133#else
1134#define SND_ATIIXP_PM_OPS NULL
1135#endif /* CONFIG_PM_SLEEP */
1136
1137/*
1138 * proc interface for register dump
1139 */
1140
1141static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1142 struct snd_info_buffer *buffer)
1143{
1144 struct atiixp_modem *chip = entry->private_data;
1145 int i;
1146
1147 for (i = 0; i < 256; i += 4)
1148 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1149}
1150
1151static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1152{
1153 snd_card_ro_proc_new(card: chip->card, name: "atiixp-modem", private_data: chip,
1154 read: snd_atiixp_proc_read);
1155}
1156
1157
1158/*
1159 * destructor
1160 */
1161
1162static void snd_atiixp_free(struct snd_card *card)
1163{
1164 snd_atiixp_chip_stop(chip: card->private_data);
1165}
1166
1167/*
1168 * constructor for chip instance
1169 */
1170static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci)
1171{
1172 struct atiixp_modem *chip = card->private_data;
1173 int err;
1174
1175 err = pcim_enable_device(pdev: pci);
1176 if (err < 0)
1177 return err;
1178
1179 spin_lock_init(&chip->reg_lock);
1180 mutex_init(&chip->open_mutex);
1181 chip->card = card;
1182 chip->pci = pci;
1183 chip->irq = -1;
1184 err = pcim_iomap_regions(pdev: pci, mask: 1 << 0, name: "ATI IXP MC97");
1185 if (err < 0)
1186 return err;
1187 chip->addr = pci_resource_start(pci, 0);
1188 chip->remap_addr = pcim_iomap_table(pdev: pci)[0];
1189
1190 if (devm_request_irq(dev: &pci->dev, irq: pci->irq, handler: snd_atiixp_interrupt,
1191 IRQF_SHARED, KBUILD_MODNAME, dev_id: chip)) {
1192 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1193 return -EBUSY;
1194 }
1195 chip->irq = pci->irq;
1196 card->sync_irq = chip->irq;
1197 card->private_free = snd_atiixp_free;
1198 pci_set_master(dev: pci);
1199
1200 return 0;
1201}
1202
1203
1204static int __snd_atiixp_probe(struct pci_dev *pci,
1205 const struct pci_device_id *pci_id)
1206{
1207 struct snd_card *card;
1208 struct atiixp_modem *chip;
1209 int err;
1210
1211 err = snd_devm_card_new(parent: &pci->dev, idx: index, xid: id, THIS_MODULE,
1212 extra_size: sizeof(*chip), card_ret: &card);
1213 if (err < 0)
1214 return err;
1215 chip = card->private_data;
1216
1217 strcpy(p: card->driver, q: "ATIIXP-MODEM");
1218 strcpy(p: card->shortname, q: "ATI IXP Modem");
1219 err = snd_atiixp_init(card, pci);
1220 if (err < 0)
1221 return err;
1222
1223 err = snd_atiixp_aclink_reset(chip);
1224 if (err < 0)
1225 return err;
1226
1227 err = snd_atiixp_mixer_new(chip, clock: ac97_clock);
1228 if (err < 0)
1229 return err;
1230
1231 err = snd_atiixp_pcm_new(chip);
1232 if (err < 0)
1233 return err;
1234
1235 snd_atiixp_proc_init(chip);
1236
1237 snd_atiixp_chip_start(chip);
1238
1239 sprintf(buf: card->longname, fmt: "%s rev %x at 0x%lx, irq %i",
1240 card->shortname, pci->revision, chip->addr, chip->irq);
1241
1242 err = snd_card_register(card);
1243 if (err < 0)
1244 return err;
1245
1246 pci_set_drvdata(pdev: pci, data: card);
1247 return 0;
1248}
1249
1250static int snd_atiixp_probe(struct pci_dev *pci,
1251 const struct pci_device_id *pci_id)
1252{
1253 return snd_card_free_on_error(dev: &pci->dev, ret: __snd_atiixp_probe(pci, pci_id));
1254}
1255
1256static struct pci_driver atiixp_modem_driver = {
1257 .name = KBUILD_MODNAME,
1258 .id_table = snd_atiixp_ids,
1259 .probe = snd_atiixp_probe,
1260 .driver = {
1261 .pm = SND_ATIIXP_PM_OPS,
1262 },
1263};
1264
1265module_pci_driver(atiixp_modem_driver);
1266

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