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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");
26MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
27
28static int index = -2; /* Exclude the first card */
29static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
30static int ac97_clock = 48000;
31
32module_param(index, int, 0444);
33MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
34module_param(id, charp, 0444);
35MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
36module_param(ac97_clock, int, 0444);
37MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
38
39/* just for backward compatibility */
40static bool enable;
41module_param(enable, bool, 0444);
42
43
44/*
45 */
46
47#define ATI_REG_ISR 0x00 /* interrupt source */
48#define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)
49#define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)
50#define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)
51#define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)
52#define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)
53#define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)
54#define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)
55#define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)
56#define ATI_REG_ISR_PHYS_INTR (1U<<8)
57#define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)
58#define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)
59#define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)
60#define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)
61#define ATI_REG_ISR_NEW_FRAME (1U<<13)
62#define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14)
63
64#define ATI_REG_IER 0x04 /* interrupt enable */
65#define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)
66#define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)
67#define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
68#define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
69#define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
70#define ATI_REG_IER_PHYS_INTR_EN (1U<<8)
71#define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)
72#define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)
73#define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)
74#define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)
75#define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */
76#define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */
77#define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
78
79#define ATI_REG_CMD 0x08 /* command */
80#define ATI_REG_CMD_POWERDOWN (1U<<0)
81#define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */
82#define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */
83#define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */
84#define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */
85#define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */
86#define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */
87#define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */
88#define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */
89#define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */
90#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
91#define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */
92#define ATI_REG_CMD_LOOPBACK_EN (1U<<23)
93#define ATI_REG_CMD_PACKED_DIS (1U<<24)
94#define ATI_REG_CMD_BURST_EN (1U<<25)
95#define ATI_REG_CMD_PANIC_EN (1U<<26)
96#define ATI_REG_CMD_MODEM_PRESENT (1U<<27)
97#define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)
98#define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)
99#define ATI_REG_CMD_AC_SYNC (1U<<30)
100#define ATI_REG_CMD_AC_RESET (1U<<31)
101
102#define ATI_REG_PHYS_OUT_ADDR 0x0c
103#define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)
104#define ATI_REG_PHYS_OUT_RW (1U<<2)
105#define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)
106#define ATI_REG_PHYS_OUT_ADDR_SHIFT 9
107#define ATI_REG_PHYS_OUT_DATA_SHIFT 16
108
109#define ATI_REG_PHYS_IN_ADDR 0x10
110#define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)
111#define ATI_REG_PHYS_IN_ADDR_SHIFT 9
112#define ATI_REG_PHYS_IN_DATA_SHIFT 16
113
114#define ATI_REG_SLOTREQ 0x14
115
116#define ATI_REG_COUNTER 0x18
117#define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */
118#define ATI_REG_COUNTER_BITCLOCK (31U<<8)
119
120#define ATI_REG_IN_FIFO_THRESHOLD 0x1c
121
122#define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20
123#define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */
124#define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */
125#define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */
126#define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30
127#define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */
128#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)
129#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
130#define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38
131#define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c
132#define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40
133#define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
134#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48
135#define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c
136#define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
137#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54
138#define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58
139#define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
140#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60
141#define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64
142#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
143#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c
144#define ATI_REG_MODEM_OUT_FIFO_USED 0x70
145#define ATI_REG_MODEM_OUT_GPIO 0x74
146#define ATI_REG_MODEM_OUT_GPIO_EN 1
147#define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
148#define ATI_REG_MODEM_IN_GPIO 0x78
149
150#define ATI_REG_MODEM_MIRROR 0x7c
151#define ATI_REG_AUDIO_MIRROR 0x80
152
153#define ATI_REG_MODEM_FIFO_FLUSH 0x88
154#define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)
155#define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)
156#define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)
157#define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)
158
159/* LINKPTR */
160#define ATI_REG_LINKPTR_EN (1U<<0)
161
162#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
163
164
165struct atiixp_modem;
166
167/*
168 * DMA packate descriptor
169 */
170
171struct atiixp_dma_desc {
172 __le32 addr; /* DMA buffer address */
173 u16 status; /* status bits */
174 u16 size; /* size of the packet in dwords */
175 __le32 next; /* address of the next packet descriptor */
176};
177
178/*
179 * stream enum
180 */
181enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
182enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
183enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
184
185#define NUM_ATI_CODECS 3
186
187
188/*
189 * constants and callbacks for each DMA type
190 */
191struct atiixp_dma_ops {
192 int type; /* ATI_DMA_XXX */
193 unsigned int llp_offset; /* LINKPTR offset */
194 unsigned int dt_cur; /* DT_CUR offset */
195 /* called from open callback */
196 void (*enable_dma)(struct atiixp_modem *chip, int on);
197 /* called from trigger (START/STOP) */
198 void (*enable_transfer)(struct atiixp_modem *chip, int on);
199 /* called from trigger (STOP only) */
200 void (*flush_dma)(struct atiixp_modem *chip);
201};
202
203/*
204 * DMA stream
205 */
206struct atiixp_dma {
207 const struct atiixp_dma_ops *ops;
208 struct snd_dma_buffer desc_buf;
209 struct snd_pcm_substream *substream; /* assigned PCM substream */
210 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */
211 unsigned int period_bytes, periods;
212 int opened;
213 int running;
214 int pcm_open_flag;
215 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
216};
217
218/*
219 * ATI IXP chip
220 */
221struct atiixp_modem {
222 struct snd_card *card;
223 struct pci_dev *pci;
224
225 struct resource *res; /* memory i/o */
226 unsigned long addr;
227 void __iomem *remap_addr;
228 int irq;
229
230 struct snd_ac97_bus *ac97_bus;
231 struct snd_ac97 *ac97[NUM_ATI_CODECS];
232
233 spinlock_t reg_lock;
234
235 struct atiixp_dma dmas[NUM_ATI_DMAS];
236 struct ac97_pcm *pcms[NUM_ATI_PCMS];
237 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
238
239 int max_channels; /* max. channels for PCM out */
240
241 unsigned int codec_not_ready_bits; /* for codec detection */
242
243 int spdif_over_aclink; /* passed from the module option */
244 struct mutex open_mutex; /* playback open mutex */
245};
246
247
248/*
249 */
250static const struct pci_device_id snd_atiixp_ids[] = {
251 { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
252 { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
253 { 0, }
254};
255
256MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
257
258
259/*
260 * lowlevel functions
261 */
262
263/*
264 * update the bits of the given register.
265 * return 1 if the bits changed.
266 */
267static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
268 unsigned int mask, unsigned int value)
269{
270 void __iomem *addr = chip->remap_addr + reg;
271 unsigned int data, old_data;
272 old_data = data = readl(addr);
273 data &= ~mask;
274 data |= value;
275 if (old_data == data)
276 return 0;
277 writel(data, addr);
278 return 1;
279}
280
281/*
282 * macros for easy use
283 */
284#define atiixp_write(chip,reg,value) \
285 writel(value, chip->remap_addr + ATI_REG_##reg)
286#define atiixp_read(chip,reg) \
287 readl(chip->remap_addr + ATI_REG_##reg)
288#define atiixp_update(chip,reg,mask,val) \
289 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
290
291/*
292 * handling DMA packets
293 *
294 * we allocate a linear buffer for the DMA, and split it to each packet.
295 * in a future version, a scatter-gather buffer should be implemented.
296 */
297
298#define ATI_DESC_LIST_SIZE \
299 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
300
301/*
302 * build packets ring for the given buffer size.
303 *
304 * IXP handles the buffer descriptors, which are connected as a linked
305 * list. although we can change the list dynamically, in this version,
306 * a static RING of buffer descriptors is used.
307 *
308 * the ring is built in this function, and is set up to the hardware.
309 */
310static int atiixp_build_dma_packets(struct atiixp_modem *chip,
311 struct atiixp_dma *dma,
312 struct snd_pcm_substream *substream,
313 unsigned int periods,
314 unsigned int period_bytes)
315{
316 unsigned int i;
317 u32 addr, desc_addr;
318 unsigned long flags;
319
320 if (periods > ATI_MAX_DESCRIPTORS)
321 return -ENOMEM;
322
323 if (dma->desc_buf.area == NULL) {
324 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
325 ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
326 return -ENOMEM;
327 dma->period_bytes = dma->periods = 0; /* clear */
328 }
329
330 if (dma->periods == periods && dma->period_bytes == period_bytes)
331 return 0;
332
333 /* reset DMA before changing the descriptor table */
334 spin_lock_irqsave(&chip->reg_lock, flags);
335 writel(0, chip->remap_addr + dma->ops->llp_offset);
336 dma->ops->enable_dma(chip, 0);
337 dma->ops->enable_dma(chip, 1);
338 spin_unlock_irqrestore(&chip->reg_lock, flags);
339
340 /* fill the entries */
341 addr = (u32)substream->runtime->dma_addr;
342 desc_addr = (u32)dma->desc_buf.addr;
343 for (i = 0; i < periods; i++) {
344 struct atiixp_dma_desc *desc;
345 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
346 desc->addr = cpu_to_le32(addr);
347 desc->status = 0;
348 desc->size = period_bytes >> 2; /* in dwords */
349 desc_addr += sizeof(struct atiixp_dma_desc);
350 if (i == periods - 1)
351 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
352 else
353 desc->next = cpu_to_le32(desc_addr);
354 addr += period_bytes;
355 }
356
357 writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
358 chip->remap_addr + dma->ops->llp_offset);
359
360 dma->period_bytes = period_bytes;
361 dma->periods = periods;
362
363 return 0;
364}
365
366/*
367 * remove the ring buffer and release it if assigned
368 */
369static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
370 struct atiixp_dma *dma,
371 struct snd_pcm_substream *substream)
372{
373 if (dma->desc_buf.area) {
374 writel(0, chip->remap_addr + dma->ops->llp_offset);
375 snd_dma_free_pages(&dma->desc_buf);
376 dma->desc_buf.area = NULL;
377 }
378}
379
380/*
381 * AC97 interface
382 */
383static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
384{
385 int timeout = 1000;
386
387 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
388 if (! timeout--) {
389 dev_warn(chip->card->dev, "codec acquire timeout\n");
390 return -EBUSY;
391 }
392 udelay(1);
393 }
394 return 0;
395}
396
397static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
398 unsigned short codec,
399 unsigned short reg)
400{
401 unsigned int data;
402 int timeout;
403
404 if (snd_atiixp_acquire_codec(chip) < 0)
405 return 0xffff;
406 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
407 ATI_REG_PHYS_OUT_ADDR_EN |
408 ATI_REG_PHYS_OUT_RW |
409 codec;
410 atiixp_write(chip, PHYS_OUT_ADDR, data);
411 if (snd_atiixp_acquire_codec(chip) < 0)
412 return 0xffff;
413 timeout = 1000;
414 do {
415 data = atiixp_read(chip, PHYS_IN_ADDR);
416 if (data & ATI_REG_PHYS_IN_READ_FLAG)
417 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
418 udelay(1);
419 } while (--timeout);
420 /* time out may happen during reset */
421 if (reg < 0x7c)
422 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
423 return 0xffff;
424}
425
426
427static void snd_atiixp_codec_write(struct atiixp_modem *chip,
428 unsigned short codec,
429 unsigned short reg, unsigned short val)
430{
431 unsigned int data;
432
433 if (snd_atiixp_acquire_codec(chip) < 0)
434 return;
435 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
436 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
437 ATI_REG_PHYS_OUT_ADDR_EN | codec;
438 atiixp_write(chip, PHYS_OUT_ADDR, data);
439}
440
441
442static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
443 unsigned short reg)
444{
445 struct atiixp_modem *chip = ac97->private_data;
446 return snd_atiixp_codec_read(chip, ac97->num, reg);
447
448}
449
450static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
451 unsigned short val)
452{
453 struct atiixp_modem *chip = ac97->private_data;
454 if (reg == AC97_GPIO_STATUS) {
455 atiixp_write(chip, MODEM_OUT_GPIO,
456 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
457 return;
458 }
459 snd_atiixp_codec_write(chip, ac97->num, reg, val);
460}
461
462/*
463 * reset AC link
464 */
465static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
466{
467 int timeout;
468
469 /* reset powerdoewn */
470 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
471 udelay(10);
472
473 /* perform a software reset */
474 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
475 atiixp_read(chip, CMD);
476 udelay(10);
477 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
478
479 timeout = 10;
480 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
481 /* do a hard reset */
482 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
483 ATI_REG_CMD_AC_SYNC);
484 atiixp_read(chip, CMD);
485 msleep(1);
486 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
487 if (!--timeout) {
488 dev_err(chip->card->dev, "codec reset timeout\n");
489 break;
490 }
491 }
492
493 /* deassert RESET and assert SYNC to make sure */
494 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
495 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
496
497 return 0;
498}
499
500#ifdef CONFIG_PM_SLEEP
501static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
502{
503 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
504 // return -EBUSY;
505 atiixp_update(chip, CMD,
506 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
507 ATI_REG_CMD_POWERDOWN);
508 return 0;
509}
510#endif
511
512/*
513 * auto-detection of codecs
514 *
515 * the IXP chip can generate interrupts for the non-existing codecs.
516 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
517 * even if all three codecs are connected.
518 */
519
520#define ALL_CODEC_NOT_READY \
521 (ATI_REG_ISR_CODEC0_NOT_READY |\
522 ATI_REG_ISR_CODEC1_NOT_READY |\
523 ATI_REG_ISR_CODEC2_NOT_READY)
524#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
525
526static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
527{
528 int timeout;
529
530 chip->codec_not_ready_bits = 0;
531 atiixp_write(chip, IER, CODEC_CHECK_BITS);
532 /* wait for the interrupts */
533 timeout = 50;
534 while (timeout-- > 0) {
535 msleep(1);
536 if (chip->codec_not_ready_bits)
537 break;
538 }
539 atiixp_write(chip, IER, 0); /* disable irqs */
540
541 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
542 dev_err(chip->card->dev, "no codec detected!\n");
543 return -ENXIO;
544 }
545 return 0;
546}
547
548
549/*
550 * enable DMA and irqs
551 */
552static int snd_atiixp_chip_start(struct atiixp_modem *chip)
553{
554 unsigned int reg;
555
556 /* set up spdif, enable burst mode */
557 reg = atiixp_read(chip, CMD);
558 reg |= ATI_REG_CMD_BURST_EN;
559 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
560 reg |= ATI_REG_CMD_MODEM_PRESENT;
561 atiixp_write(chip, CMD, reg);
562
563 /* clear all interrupt source */
564 atiixp_write(chip, ISR, 0xffffffff);
565 /* enable irqs */
566 atiixp_write(chip, IER,
567 ATI_REG_IER_MODEM_STATUS_EN |
568 ATI_REG_IER_MODEM_IN_XRUN_EN |
569 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
570 return 0;
571}
572
573
574/*
575 * disable DMA and IRQs
576 */
577static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
578{
579 /* clear interrupt source */
580 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
581 /* disable irqs */
582 atiixp_write(chip, IER, 0);
583 return 0;
584}
585
586
587/*
588 * PCM section
589 */
590
591/*
592 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
593 * position. when SG-buffer is implemented, the offset must be calculated
594 * correctly...
595 */
596static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
597{
598 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
599 struct snd_pcm_runtime *runtime = substream->runtime;
600 struct atiixp_dma *dma = runtime->private_data;
601 unsigned int curptr;
602 int timeout = 1000;
603
604 while (timeout--) {
605 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
606 if (curptr < dma->buf_addr)
607 continue;
608 curptr -= dma->buf_addr;
609 if (curptr >= dma->buf_bytes)
610 continue;
611 return bytes_to_frames(runtime, curptr);
612 }
613 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
614 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
615 return 0;
616}
617
618/*
619 * XRUN detected, and stop the PCM substream
620 */
621static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
622 struct atiixp_dma *dma)
623{
624 if (! dma->substream || ! dma->running)
625 return;
626 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
627 snd_pcm_stop_xrun(dma->substream);
628}
629
630/*
631 * the period ack. update the substream.
632 */
633static void snd_atiixp_update_dma(struct atiixp_modem *chip,
634 struct atiixp_dma *dma)
635{
636 if (! dma->substream || ! dma->running)
637 return;
638 snd_pcm_period_elapsed(dma->substream);
639}
640
641/* set BUS_BUSY interrupt bit if any DMA is running */
642/* call with spinlock held */
643static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
644{
645 unsigned int bus_busy;
646 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
647 ATI_REG_CMD_MODEM_RECEIVE_EN))
648 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
649 else
650 bus_busy = 0;
651 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
652}
653
654/* common trigger callback
655 * calling the lowlevel callbacks in it
656 */
657static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
658{
659 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
660 struct atiixp_dma *dma = substream->runtime->private_data;
661 int err = 0;
662
663 if (snd_BUG_ON(!dma->ops->enable_transfer ||
664 !dma->ops->flush_dma))
665 return -EINVAL;
666
667 spin_lock(&chip->reg_lock);
668 switch(cmd) {
669 case SNDRV_PCM_TRIGGER_START:
670 dma->ops->enable_transfer(chip, 1);
671 dma->running = 1;
672 break;
673 case SNDRV_PCM_TRIGGER_STOP:
674 dma->ops->enable_transfer(chip, 0);
675 dma->running = 0;
676 break;
677 default:
678 err = -EINVAL;
679 break;
680 }
681 if (! err) {
682 snd_atiixp_check_bus_busy(chip);
683 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
684 dma->ops->flush_dma(chip);
685 snd_atiixp_check_bus_busy(chip);
686 }
687 }
688 spin_unlock(&chip->reg_lock);
689 return err;
690}
691
692
693/*
694 * lowlevel callbacks for each DMA type
695 *
696 * every callback is supposed to be called in chip->reg_lock spinlock
697 */
698
699/* flush FIFO of analog OUT DMA */
700static void atiixp_out_flush_dma(struct atiixp_modem *chip)
701{
702 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
703}
704
705/* enable/disable analog OUT DMA */
706static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
707{
708 unsigned int data;
709 data = atiixp_read(chip, CMD);
710 if (on) {
711 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
712 return;
713 atiixp_out_flush_dma(chip);
714 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
715 } else
716 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
717 atiixp_write(chip, CMD, data);
718}
719
720/* start/stop transfer over OUT DMA */
721static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
722{
723 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
724 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
725}
726
727/* enable/disable analog IN DMA */
728static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
729{
730 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
731 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
732}
733
734/* start/stop analog IN DMA */
735static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
736{
737 if (on) {
738 unsigned int data = atiixp_read(chip, CMD);
739 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
740 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
741 atiixp_write(chip, CMD, data);
742 }
743 } else
744 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
745}
746
747/* flush FIFO of analog IN DMA */
748static void atiixp_in_flush_dma(struct atiixp_modem *chip)
749{
750 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
751}
752
753/* set up slots and formats for analog OUT */
754static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
755{
756 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
757 unsigned int data;
758
759 spin_lock_irq(&chip->reg_lock);
760 /* set output threshold */
761 data = atiixp_read(chip, MODEM_OUT_FIFO);
762 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
763 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
764 atiixp_write(chip, MODEM_OUT_FIFO, data);
765 spin_unlock_irq(&chip->reg_lock);
766 return 0;
767}
768
769/* set up slots and formats for analog IN */
770static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
771{
772 return 0;
773}
774
775/*
776 * hw_params - allocate the buffer and set up buffer descriptors
777 */
778static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
779 struct snd_pcm_hw_params *hw_params)
780{
781 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
782 struct atiixp_dma *dma = substream->runtime->private_data;
783 int err;
784 int i;
785
786 dma->buf_addr = substream->runtime->dma_addr;
787 dma->buf_bytes = params_buffer_bytes(hw_params);
788
789 err = atiixp_build_dma_packets(chip, dma, substream,
790 params_periods(hw_params),
791 params_period_bytes(hw_params));
792 if (err < 0)
793 return err;
794
795 /* set up modem rate */
796 for (i = 0; i < NUM_ATI_CODECS; i++) {
797 if (! chip->ac97[i])
798 continue;
799 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
800 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
801 }
802
803 return err;
804}
805
806static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
807{
808 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
809 struct atiixp_dma *dma = substream->runtime->private_data;
810
811 atiixp_clear_dma_packets(chip, dma, substream);
812 return 0;
813}
814
815
816/*
817 * pcm hardware definition, identical for all DMA types
818 */
819static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
820{
821 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
822 SNDRV_PCM_INFO_BLOCK_TRANSFER |
823 SNDRV_PCM_INFO_MMAP_VALID),
824 .formats = SNDRV_PCM_FMTBIT_S16_LE,
825 .rates = (SNDRV_PCM_RATE_8000 |
826 SNDRV_PCM_RATE_16000 |
827 SNDRV_PCM_RATE_KNOT),
828 .rate_min = 8000,
829 .rate_max = 16000,
830 .channels_min = 2,
831 .channels_max = 2,
832 .buffer_bytes_max = 256 * 1024,
833 .period_bytes_min = 32,
834 .period_bytes_max = 128 * 1024,
835 .periods_min = 2,
836 .periods_max = ATI_MAX_DESCRIPTORS,
837};
838
839static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
840 struct atiixp_dma *dma, int pcm_type)
841{
842 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
843 struct snd_pcm_runtime *runtime = substream->runtime;
844 int err;
845 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
846 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
847 .count = ARRAY_SIZE(rates),
848 .list = rates,
849 .mask = 0,
850 };
851
852 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
853 return -EINVAL;
854
855 if (dma->opened)
856 return -EBUSY;
857 dma->substream = substream;
858 runtime->hw = snd_atiixp_pcm_hw;
859 dma->ac97_pcm_type = pcm_type;
860 if ((err = snd_pcm_hw_constraint_list(runtime, 0,
861 SNDRV_PCM_HW_PARAM_RATE,
862 &hw_constraints_rates)) < 0)
863 return err;
864 if ((err = snd_pcm_hw_constraint_integer(runtime,
865 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
866 return err;
867 runtime->private_data = dma;
868
869 /* enable DMA bits */
870 spin_lock_irq(&chip->reg_lock);
871 dma->ops->enable_dma(chip, 1);
872 spin_unlock_irq(&chip->reg_lock);
873 dma->opened = 1;
874
875 return 0;
876}
877
878static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
879 struct atiixp_dma *dma)
880{
881 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
882 /* disable DMA bits */
883 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
884 return -EINVAL;
885 spin_lock_irq(&chip->reg_lock);
886 dma->ops->enable_dma(chip, 0);
887 spin_unlock_irq(&chip->reg_lock);
888 dma->substream = NULL;
889 dma->opened = 0;
890 return 0;
891}
892
893/*
894 */
895static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
896{
897 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
898 int err;
899
900 mutex_lock(&chip->open_mutex);
901 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
902 mutex_unlock(&chip->open_mutex);
903 if (err < 0)
904 return err;
905 return 0;
906}
907
908static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
909{
910 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
911 int err;
912 mutex_lock(&chip->open_mutex);
913 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
914 mutex_unlock(&chip->open_mutex);
915 return err;
916}
917
918static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
919{
920 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
921 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
922}
923
924static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
925{
926 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
927 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
928}
929
930
931/* AC97 playback */
932static const struct snd_pcm_ops snd_atiixp_playback_ops = {
933 .open = snd_atiixp_playback_open,
934 .close = snd_atiixp_playback_close,
935 .hw_params = snd_atiixp_pcm_hw_params,
936 .hw_free = snd_atiixp_pcm_hw_free,
937 .prepare = snd_atiixp_playback_prepare,
938 .trigger = snd_atiixp_pcm_trigger,
939 .pointer = snd_atiixp_pcm_pointer,
940};
941
942/* AC97 capture */
943static const struct snd_pcm_ops snd_atiixp_capture_ops = {
944 .open = snd_atiixp_capture_open,
945 .close = snd_atiixp_capture_close,
946 .hw_params = snd_atiixp_pcm_hw_params,
947 .hw_free = snd_atiixp_pcm_hw_free,
948 .prepare = snd_atiixp_capture_prepare,
949 .trigger = snd_atiixp_pcm_trigger,
950 .pointer = snd_atiixp_pcm_pointer,
951};
952
953static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
954 .type = ATI_DMA_PLAYBACK,
955 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
956 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
957 .enable_dma = atiixp_out_enable_dma,
958 .enable_transfer = atiixp_out_enable_transfer,
959 .flush_dma = atiixp_out_flush_dma,
960};
961
962static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
963 .type = ATI_DMA_CAPTURE,
964 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
965 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
966 .enable_dma = atiixp_in_enable_dma,
967 .enable_transfer = atiixp_in_enable_transfer,
968 .flush_dma = atiixp_in_flush_dma,
969};
970
971static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
972{
973 struct snd_pcm *pcm;
974 int err;
975
976 /* initialize constants */
977 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
978 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
979
980 /* PCM #0: analog I/O */
981 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
982 if (err < 0)
983 return err;
984 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
985 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
986 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
987 pcm->private_data = chip;
988 strcpy(pcm->name, "ATI IXP MC97");
989 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
990
991 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
992 &chip->pci->dev, 64*1024, 128*1024);
993
994 return 0;
995}
996
997
998
999/*
1000 * interrupt handler
1001 */
1002static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1003{
1004 struct atiixp_modem *chip = dev_id;
1005 unsigned int status;
1006
1007 status = atiixp_read(chip, ISR);
1008
1009 if (! status)
1010 return IRQ_NONE;
1011
1012 /* process audio DMA */
1013 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1014 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1015 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1016 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1017 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1018 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1019 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1020 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1021
1022 /* for codec detection */
1023 if (status & CODEC_CHECK_BITS) {
1024 unsigned int detected;
1025 detected = status & CODEC_CHECK_BITS;
1026 spin_lock(&chip->reg_lock);
1027 chip->codec_not_ready_bits |= detected;
1028 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1029 spin_unlock(&chip->reg_lock);
1030 }
1031
1032 /* ack */
1033 atiixp_write(chip, ISR, status);
1034
1035 return IRQ_HANDLED;
1036}
1037
1038
1039/*
1040 * ac97 mixer section
1041 */
1042
1043static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1044{
1045 struct snd_ac97_bus *pbus;
1046 struct snd_ac97_template ac97;
1047 int i, err;
1048 int codec_count;
1049 static const struct snd_ac97_bus_ops ops = {
1050 .write = snd_atiixp_ac97_write,
1051 .read = snd_atiixp_ac97_read,
1052 };
1053 static const unsigned int codec_skip[NUM_ATI_CODECS] = {
1054 ATI_REG_ISR_CODEC0_NOT_READY,
1055 ATI_REG_ISR_CODEC1_NOT_READY,
1056 ATI_REG_ISR_CODEC2_NOT_READY,
1057 };
1058
1059 if (snd_atiixp_codec_detect(chip) < 0)
1060 return -ENXIO;
1061
1062 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 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 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1077 chip->ac97[i] = NULL; /* to be sure */
1078 dev_dbg(chip->card->dev,
1079 "codec %d not available for modem\n", i);
1080 continue;
1081 }
1082 codec_count++;
1083 }
1084
1085 if (! codec_count) {
1086 dev_err(chip->card->dev, "no codec available\n");
1087 return -ENODEV;
1088 }
1089
1090 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1091
1092 return 0;
1093}
1094
1095
1096#ifdef CONFIG_PM_SLEEP
1097/*
1098 * power management
1099 */
1100static int snd_atiixp_suspend(struct device *dev)
1101{
1102 struct snd_card *card = dev_get_drvdata(dev);
1103 struct atiixp_modem *chip = card->private_data;
1104 int i;
1105
1106 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1107 for (i = 0; i < NUM_ATI_CODECS; i++)
1108 snd_ac97_suspend(chip->ac97[i]);
1109 snd_atiixp_aclink_down(chip);
1110 snd_atiixp_chip_stop(chip);
1111 return 0;
1112}
1113
1114static int snd_atiixp_resume(struct device *dev)
1115{
1116 struct snd_card *card = dev_get_drvdata(dev);
1117 struct atiixp_modem *chip = card->private_data;
1118 int i;
1119
1120 snd_atiixp_aclink_reset(chip);
1121 snd_atiixp_chip_start(chip);
1122
1123 for (i = 0; i < NUM_ATI_CODECS; i++)
1124 snd_ac97_resume(chip->ac97[i]);
1125
1126 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1127 return 0;
1128}
1129
1130static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1131#define SND_ATIIXP_PM_OPS &snd_atiixp_pm
1132#else
1133#define SND_ATIIXP_PM_OPS NULL
1134#endif /* CONFIG_PM_SLEEP */
1135
1136/*
1137 * proc interface for register dump
1138 */
1139
1140static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1141 struct snd_info_buffer *buffer)
1142{
1143 struct atiixp_modem *chip = entry->private_data;
1144 int i;
1145
1146 for (i = 0; i < 256; i += 4)
1147 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1148}
1149
1150static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1151{
1152 snd_card_ro_proc_new(chip->card, "atiixp-modem", chip,
1153 snd_atiixp_proc_read);
1154}
1155
1156
1157/*
1158 * destructor
1159 */
1160
1161static int snd_atiixp_free(struct atiixp_modem *chip)
1162{
1163 if (chip->irq < 0)
1164 goto __hw_end;
1165 snd_atiixp_chip_stop(chip);
1166
1167 __hw_end:
1168 if (chip->irq >= 0)
1169 free_irq(chip->irq, chip);
1170 iounmap(chip->remap_addr);
1171 pci_release_regions(chip->pci);
1172 pci_disable_device(chip->pci);
1173 kfree(chip);
1174 return 0;
1175}
1176
1177static int snd_atiixp_dev_free(struct snd_device *device)
1178{
1179 struct atiixp_modem *chip = device->device_data;
1180 return snd_atiixp_free(chip);
1181}
1182
1183/*
1184 * constructor for chip instance
1185 */
1186static int snd_atiixp_create(struct snd_card *card,
1187 struct pci_dev *pci,
1188 struct atiixp_modem **r_chip)
1189{
1190 static const struct snd_device_ops ops = {
1191 .dev_free = snd_atiixp_dev_free,
1192 };
1193 struct atiixp_modem *chip;
1194 int err;
1195
1196 if ((err = pci_enable_device(pci)) < 0)
1197 return err;
1198
1199 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1200 if (chip == NULL) {
1201 pci_disable_device(pci);
1202 return -ENOMEM;
1203 }
1204
1205 spin_lock_init(&chip->reg_lock);
1206 mutex_init(&chip->open_mutex);
1207 chip->card = card;
1208 chip->pci = pci;
1209 chip->irq = -1;
1210 if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1211 kfree(chip);
1212 pci_disable_device(pci);
1213 return err;
1214 }
1215 chip->addr = pci_resource_start(pci, 0);
1216 chip->remap_addr = pci_ioremap_bar(pci, 0);
1217 if (chip->remap_addr == NULL) {
1218 dev_err(card->dev, "AC'97 space ioremap problem\n");
1219 snd_atiixp_free(chip);
1220 return -EIO;
1221 }
1222
1223 if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1224 KBUILD_MODNAME, chip)) {
1225 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1226 snd_atiixp_free(chip);
1227 return -EBUSY;
1228 }
1229 chip->irq = pci->irq;
1230 card->sync_irq = chip->irq;
1231 pci_set_master(pci);
1232
1233 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1234 snd_atiixp_free(chip);
1235 return err;
1236 }
1237
1238 *r_chip = chip;
1239 return 0;
1240}
1241
1242
1243static int snd_atiixp_probe(struct pci_dev *pci,
1244 const struct pci_device_id *pci_id)
1245{
1246 struct snd_card *card;
1247 struct atiixp_modem *chip;
1248 int err;
1249
1250 err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1251 if (err < 0)
1252 return err;
1253
1254 strcpy(card->driver, "ATIIXP-MODEM");
1255 strcpy(card->shortname, "ATI IXP Modem");
1256 if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1257 goto __error;
1258 card->private_data = chip;
1259
1260 if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1261 goto __error;
1262
1263 if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1264 goto __error;
1265
1266 if ((err = snd_atiixp_pcm_new(chip)) < 0)
1267 goto __error;
1268
1269 snd_atiixp_proc_init(chip);
1270
1271 snd_atiixp_chip_start(chip);
1272
1273 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1274 card->shortname, pci->revision, chip->addr, chip->irq);
1275
1276 if ((err = snd_card_register(card)) < 0)
1277 goto __error;
1278
1279 pci_set_drvdata(pci, card);
1280 return 0;
1281
1282 __error:
1283 snd_card_free(card);
1284 return err;
1285}
1286
1287static void snd_atiixp_remove(struct pci_dev *pci)
1288{
1289 snd_card_free(pci_get_drvdata(pci));
1290}
1291
1292static struct pci_driver atiixp_modem_driver = {
1293 .name = KBUILD_MODNAME,
1294 .id_table = snd_atiixp_ids,
1295 .probe = snd_atiixp_probe,
1296 .remove = snd_atiixp_remove,
1297 .driver = {
1298 .pm = SND_ATIIXP_PM_OPS,
1299 },
1300};
1301
1302module_pci_driver(atiixp_modem_driver);
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(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, &chip->pci->dev,
324 ATI_DESC_LIST_SIZE, &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(0, 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(&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((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
357 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(0, chip->remap_addr + dma->ops->llp_offset);
374 snd_dma_free_pages(&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, 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, 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(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(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(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, 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(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(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(&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(&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(&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(&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(hw_params);
787
788 err = atiixp_build_dma_packets(chip, dma, substream,
789 params_periods(hw_params),
790 params_period_bytes(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(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
799 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 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, 0, SNDRV_PCM_HW_PARAM_RATE,
860 &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(&chip->reg_lock);
870 dma->ops->enable_dma(chip, 1);
871 spin_unlock_irq(&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(&chip->reg_lock);
885 dma->ops->enable_dma(chip, 0);
886 spin_unlock_irq(&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, &chip->dmas[ATI_DMA_PLAYBACK], 0);
901 mutex_unlock(&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, &chip->dmas[ATI_DMA_PLAYBACK]);
913 mutex_unlock(&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, &chip->dmas[ATI_DMA_CAPTURE], 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, &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(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
981 if (err < 0)
982 return err;
983 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
984 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
985 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
986 pcm->private_data = chip;
987 strcpy(pcm->name, "ATI IXP MC97");
988 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
989
990 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
991 &chip->pci->dev, 64*1024, 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, &chip->dmas[ATI_DMA_PLAYBACK]);
1014 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1015 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1016 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1017 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1018 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1019 snd_atiixp_update_dma(chip, &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(&chip->reg_lock);
1026 chip->codec_not_ready_bits |= detected;
1027 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1028 spin_unlock(&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(chip->card, 0, &ops, chip, &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(pbus, &ac97, &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(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(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(chip->card, "atiixp-modem", chip,
1154 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(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(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(pci, 1 << 0, "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(pci)[0];
1189
1190 if (devm_request_irq(&pci->dev, pci->irq, snd_atiixp_interrupt,
1191 IRQF_SHARED, KBUILD_MODNAME, 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(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(&pci->dev, index, id, THIS_MODULE,
1212 sizeof(*chip), &card);
1213 if (err < 0)
1214 return err;
1215 chip = card->private_data;
1216
1217 strcpy(card->driver, "ATIIXP-MODEM");
1218 strcpy(card->shortname, "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, 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(card->longname, "%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(pci, 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(&pci->dev, __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);