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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/*
2 * ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
3 *
4 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <linux/io.h>
23#include <linux/delay.h>
24#include <linux/interrupt.h>
25#include <linux/init.h>
26#include <linux/pci.h>
27#include <linux/slab.h>
28#include <linux/module.h>
29#include <linux/mutex.h>
30#include <sound/core.h>
31#include <sound/pcm.h>
32#include <sound/pcm_params.h>
33#include <sound/info.h>
34#include <sound/ac97_codec.h>
35#include <sound/initval.h>
36
37MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
38MODULE_DESCRIPTION("ATI IXP MC97 controller");
39MODULE_LICENSE("GPL");
40MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
41
42static int index = -2; /* Exclude the first card */
43static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
44static int ac97_clock = 48000;
45
46module_param(index, int, 0444);
47MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
48module_param(id, charp, 0444);
49MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
50module_param(ac97_clock, int, 0444);
51MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
52
53/* just for backward compatibility */
54static bool enable;
55module_param(enable, bool, 0444);
56
57
58/*
59 */
60
61#define ATI_REG_ISR 0x00 /* interrupt source */
62#define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)
63#define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)
64#define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)
65#define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)
66#define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)
67#define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)
68#define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)
69#define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)
70#define ATI_REG_ISR_PHYS_INTR (1U<<8)
71#define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)
72#define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)
73#define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)
74#define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)
75#define ATI_REG_ISR_NEW_FRAME (1U<<13)
76#define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14)
77
78#define ATI_REG_IER 0x04 /* interrupt enable */
79#define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)
80#define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)
81#define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
82#define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
83#define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
84#define ATI_REG_IER_PHYS_INTR_EN (1U<<8)
85#define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)
86#define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)
87#define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)
88#define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)
89#define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */
90#define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */
91#define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
92
93#define ATI_REG_CMD 0x08 /* command */
94#define ATI_REG_CMD_POWERDOWN (1U<<0)
95#define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */
96#define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */
97#define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */
98#define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */
99#define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */
100#define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */
101#define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */
102#define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */
103#define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */
104#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
105#define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */
106#define ATI_REG_CMD_LOOPBACK_EN (1U<<23)
107#define ATI_REG_CMD_PACKED_DIS (1U<<24)
108#define ATI_REG_CMD_BURST_EN (1U<<25)
109#define ATI_REG_CMD_PANIC_EN (1U<<26)
110#define ATI_REG_CMD_MODEM_PRESENT (1U<<27)
111#define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)
112#define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)
113#define ATI_REG_CMD_AC_SYNC (1U<<30)
114#define ATI_REG_CMD_AC_RESET (1U<<31)
115
116#define ATI_REG_PHYS_OUT_ADDR 0x0c
117#define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)
118#define ATI_REG_PHYS_OUT_RW (1U<<2)
119#define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)
120#define ATI_REG_PHYS_OUT_ADDR_SHIFT 9
121#define ATI_REG_PHYS_OUT_DATA_SHIFT 16
122
123#define ATI_REG_PHYS_IN_ADDR 0x10
124#define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)
125#define ATI_REG_PHYS_IN_ADDR_SHIFT 9
126#define ATI_REG_PHYS_IN_DATA_SHIFT 16
127
128#define ATI_REG_SLOTREQ 0x14
129
130#define ATI_REG_COUNTER 0x18
131#define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */
132#define ATI_REG_COUNTER_BITCLOCK (31U<<8)
133
134#define ATI_REG_IN_FIFO_THRESHOLD 0x1c
135
136#define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20
137#define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */
138#define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */
139#define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */
140#define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30
141#define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */
142#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)
143#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
144#define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38
145#define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c
146#define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40
147#define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
148#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48
149#define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c
150#define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
151#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54
152#define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58
153#define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
154#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60
155#define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64
156#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
157#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c
158#define ATI_REG_MODEM_OUT_FIFO_USED 0x70
159#define ATI_REG_MODEM_OUT_GPIO 0x74
160#define ATI_REG_MODEM_OUT_GPIO_EN 1
161#define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
162#define ATI_REG_MODEM_IN_GPIO 0x78
163
164#define ATI_REG_MODEM_MIRROR 0x7c
165#define ATI_REG_AUDIO_MIRROR 0x80
166
167#define ATI_REG_MODEM_FIFO_FLUSH 0x88
168#define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)
169#define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)
170#define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)
171#define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)
172
173/* LINKPTR */
174#define ATI_REG_LINKPTR_EN (1U<<0)
175
176#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
177
178
179struct atiixp_modem;
180
181/*
182 * DMA packate descriptor
183 */
184
185struct atiixp_dma_desc {
186 u32 addr; /* DMA buffer address */
187 u16 status; /* status bits */
188 u16 size; /* size of the packet in dwords */
189 u32 next; /* address of the next packet descriptor */
190};
191
192/*
193 * stream enum
194 */
195enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
196enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
197enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
198
199#define NUM_ATI_CODECS 3
200
201
202/*
203 * constants and callbacks for each DMA type
204 */
205struct atiixp_dma_ops {
206 int type; /* ATI_DMA_XXX */
207 unsigned int llp_offset; /* LINKPTR offset */
208 unsigned int dt_cur; /* DT_CUR offset */
209 /* called from open callback */
210 void (*enable_dma)(struct atiixp_modem *chip, int on);
211 /* called from trigger (START/STOP) */
212 void (*enable_transfer)(struct atiixp_modem *chip, int on);
213 /* called from trigger (STOP only) */
214 void (*flush_dma)(struct atiixp_modem *chip);
215};
216
217/*
218 * DMA stream
219 */
220struct atiixp_dma {
221 const struct atiixp_dma_ops *ops;
222 struct snd_dma_buffer desc_buf;
223 struct snd_pcm_substream *substream; /* assigned PCM substream */
224 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */
225 unsigned int period_bytes, periods;
226 int opened;
227 int running;
228 int pcm_open_flag;
229 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
230};
231
232/*
233 * ATI IXP chip
234 */
235struct atiixp_modem {
236 struct snd_card *card;
237 struct pci_dev *pci;
238
239 struct resource *res; /* memory i/o */
240 unsigned long addr;
241 void __iomem *remap_addr;
242 int irq;
243
244 struct snd_ac97_bus *ac97_bus;
245 struct snd_ac97 *ac97[NUM_ATI_CODECS];
246
247 spinlock_t reg_lock;
248
249 struct atiixp_dma dmas[NUM_ATI_DMAS];
250 struct ac97_pcm *pcms[NUM_ATI_PCMS];
251 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
252
253 int max_channels; /* max. channels for PCM out */
254
255 unsigned int codec_not_ready_bits; /* for codec detection */
256
257 int spdif_over_aclink; /* passed from the module option */
258 struct mutex open_mutex; /* playback open mutex */
259};
260
261
262/*
263 */
264static const struct pci_device_id snd_atiixp_ids[] = {
265 { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
266 { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
267 { 0, }
268};
269
270MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
271
272
273/*
274 * lowlevel functions
275 */
276
277/*
278 * update the bits of the given register.
279 * return 1 if the bits changed.
280 */
281static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
282 unsigned int mask, unsigned int value)
283{
284 void __iomem *addr = chip->remap_addr + reg;
285 unsigned int data, old_data;
286 old_data = data = readl(addr);
287 data &= ~mask;
288 data |= value;
289 if (old_data == data)
290 return 0;
291 writel(data, addr);
292 return 1;
293}
294
295/*
296 * macros for easy use
297 */
298#define atiixp_write(chip,reg,value) \
299 writel(value, chip->remap_addr + ATI_REG_##reg)
300#define atiixp_read(chip,reg) \
301 readl(chip->remap_addr + ATI_REG_##reg)
302#define atiixp_update(chip,reg,mask,val) \
303 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
304
305/*
306 * handling DMA packets
307 *
308 * we allocate a linear buffer for the DMA, and split it to each packet.
309 * in a future version, a scatter-gather buffer should be implemented.
310 */
311
312#define ATI_DESC_LIST_SIZE \
313 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
314
315/*
316 * build packets ring for the given buffer size.
317 *
318 * IXP handles the buffer descriptors, which are connected as a linked
319 * list. although we can change the list dynamically, in this version,
320 * a static RING of buffer descriptors is used.
321 *
322 * the ring is built in this function, and is set up to the hardware.
323 */
324static int atiixp_build_dma_packets(struct atiixp_modem *chip,
325 struct atiixp_dma *dma,
326 struct snd_pcm_substream *substream,
327 unsigned int periods,
328 unsigned int period_bytes)
329{
330 unsigned int i;
331 u32 addr, desc_addr;
332 unsigned long flags;
333
334 if (periods > ATI_MAX_DESCRIPTORS)
335 return -ENOMEM;
336
337 if (dma->desc_buf.area == NULL) {
338 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
339 ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
340 return -ENOMEM;
341 dma->period_bytes = dma->periods = 0; /* clear */
342 }
343
344 if (dma->periods == periods && dma->period_bytes == period_bytes)
345 return 0;
346
347 /* reset DMA before changing the descriptor table */
348 spin_lock_irqsave(&chip->reg_lock, flags);
349 writel(0, chip->remap_addr + dma->ops->llp_offset);
350 dma->ops->enable_dma(chip, 0);
351 dma->ops->enable_dma(chip, 1);
352 spin_unlock_irqrestore(&chip->reg_lock, flags);
353
354 /* fill the entries */
355 addr = (u32)substream->runtime->dma_addr;
356 desc_addr = (u32)dma->desc_buf.addr;
357 for (i = 0; i < periods; i++) {
358 struct atiixp_dma_desc *desc;
359 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
360 desc->addr = cpu_to_le32(addr);
361 desc->status = 0;
362 desc->size = period_bytes >> 2; /* in dwords */
363 desc_addr += sizeof(struct atiixp_dma_desc);
364 if (i == periods - 1)
365 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
366 else
367 desc->next = cpu_to_le32(desc_addr);
368 addr += period_bytes;
369 }
370
371 writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
372 chip->remap_addr + dma->ops->llp_offset);
373
374 dma->period_bytes = period_bytes;
375 dma->periods = periods;
376
377 return 0;
378}
379
380/*
381 * remove the ring buffer and release it if assigned
382 */
383static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
384 struct atiixp_dma *dma,
385 struct snd_pcm_substream *substream)
386{
387 if (dma->desc_buf.area) {
388 writel(0, chip->remap_addr + dma->ops->llp_offset);
389 snd_dma_free_pages(&dma->desc_buf);
390 dma->desc_buf.area = NULL;
391 }
392}
393
394/*
395 * AC97 interface
396 */
397static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
398{
399 int timeout = 1000;
400
401 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
402 if (! timeout--) {
403 dev_warn(chip->card->dev, "codec acquire timeout\n");
404 return -EBUSY;
405 }
406 udelay(1);
407 }
408 return 0;
409}
410
411static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
412 unsigned short codec,
413 unsigned short reg)
414{
415 unsigned int data;
416 int timeout;
417
418 if (snd_atiixp_acquire_codec(chip) < 0)
419 return 0xffff;
420 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
421 ATI_REG_PHYS_OUT_ADDR_EN |
422 ATI_REG_PHYS_OUT_RW |
423 codec;
424 atiixp_write(chip, PHYS_OUT_ADDR, data);
425 if (snd_atiixp_acquire_codec(chip) < 0)
426 return 0xffff;
427 timeout = 1000;
428 do {
429 data = atiixp_read(chip, PHYS_IN_ADDR);
430 if (data & ATI_REG_PHYS_IN_READ_FLAG)
431 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
432 udelay(1);
433 } while (--timeout);
434 /* time out may happen during reset */
435 if (reg < 0x7c)
436 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
437 return 0xffff;
438}
439
440
441static void snd_atiixp_codec_write(struct atiixp_modem *chip,
442 unsigned short codec,
443 unsigned short reg, unsigned short val)
444{
445 unsigned int data;
446
447 if (snd_atiixp_acquire_codec(chip) < 0)
448 return;
449 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
450 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
451 ATI_REG_PHYS_OUT_ADDR_EN | codec;
452 atiixp_write(chip, PHYS_OUT_ADDR, data);
453}
454
455
456static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
457 unsigned short reg)
458{
459 struct atiixp_modem *chip = ac97->private_data;
460 return snd_atiixp_codec_read(chip, ac97->num, reg);
461
462}
463
464static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
465 unsigned short val)
466{
467 struct atiixp_modem *chip = ac97->private_data;
468 if (reg == AC97_GPIO_STATUS) {
469 atiixp_write(chip, MODEM_OUT_GPIO,
470 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
471 return;
472 }
473 snd_atiixp_codec_write(chip, ac97->num, reg, val);
474}
475
476/*
477 * reset AC link
478 */
479static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
480{
481 int timeout;
482
483 /* reset powerdoewn */
484 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
485 udelay(10);
486
487 /* perform a software reset */
488 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
489 atiixp_read(chip, CMD);
490 udelay(10);
491 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
492
493 timeout = 10;
494 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
495 /* do a hard reset */
496 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
497 ATI_REG_CMD_AC_SYNC);
498 atiixp_read(chip, CMD);
499 msleep(1);
500 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
501 if (!--timeout) {
502 dev_err(chip->card->dev, "codec reset timeout\n");
503 break;
504 }
505 }
506
507 /* deassert RESET and assert SYNC to make sure */
508 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
509 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
510
511 return 0;
512}
513
514#ifdef CONFIG_PM_SLEEP
515static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
516{
517 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
518 // return -EBUSY;
519 atiixp_update(chip, CMD,
520 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
521 ATI_REG_CMD_POWERDOWN);
522 return 0;
523}
524#endif
525
526/*
527 * auto-detection of codecs
528 *
529 * the IXP chip can generate interrupts for the non-existing codecs.
530 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
531 * even if all three codecs are connected.
532 */
533
534#define ALL_CODEC_NOT_READY \
535 (ATI_REG_ISR_CODEC0_NOT_READY |\
536 ATI_REG_ISR_CODEC1_NOT_READY |\
537 ATI_REG_ISR_CODEC2_NOT_READY)
538#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
539
540static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
541{
542 int timeout;
543
544 chip->codec_not_ready_bits = 0;
545 atiixp_write(chip, IER, CODEC_CHECK_BITS);
546 /* wait for the interrupts */
547 timeout = 50;
548 while (timeout-- > 0) {
549 msleep(1);
550 if (chip->codec_not_ready_bits)
551 break;
552 }
553 atiixp_write(chip, IER, 0); /* disable irqs */
554
555 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
556 dev_err(chip->card->dev, "no codec detected!\n");
557 return -ENXIO;
558 }
559 return 0;
560}
561
562
563/*
564 * enable DMA and irqs
565 */
566static int snd_atiixp_chip_start(struct atiixp_modem *chip)
567{
568 unsigned int reg;
569
570 /* set up spdif, enable burst mode */
571 reg = atiixp_read(chip, CMD);
572 reg |= ATI_REG_CMD_BURST_EN;
573 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
574 reg |= ATI_REG_CMD_MODEM_PRESENT;
575 atiixp_write(chip, CMD, reg);
576
577 /* clear all interrupt source */
578 atiixp_write(chip, ISR, 0xffffffff);
579 /* enable irqs */
580 atiixp_write(chip, IER,
581 ATI_REG_IER_MODEM_STATUS_EN |
582 ATI_REG_IER_MODEM_IN_XRUN_EN |
583 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
584 return 0;
585}
586
587
588/*
589 * disable DMA and IRQs
590 */
591static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
592{
593 /* clear interrupt source */
594 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
595 /* disable irqs */
596 atiixp_write(chip, IER, 0);
597 return 0;
598}
599
600
601/*
602 * PCM section
603 */
604
605/*
606 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
607 * position. when SG-buffer is implemented, the offset must be calculated
608 * correctly...
609 */
610static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
611{
612 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
613 struct snd_pcm_runtime *runtime = substream->runtime;
614 struct atiixp_dma *dma = runtime->private_data;
615 unsigned int curptr;
616 int timeout = 1000;
617
618 while (timeout--) {
619 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
620 if (curptr < dma->buf_addr)
621 continue;
622 curptr -= dma->buf_addr;
623 if (curptr >= dma->buf_bytes)
624 continue;
625 return bytes_to_frames(runtime, curptr);
626 }
627 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
628 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
629 return 0;
630}
631
632/*
633 * XRUN detected, and stop the PCM substream
634 */
635static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
636 struct atiixp_dma *dma)
637{
638 if (! dma->substream || ! dma->running)
639 return;
640 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
641 snd_pcm_stop_xrun(dma->substream);
642}
643
644/*
645 * the period ack. update the substream.
646 */
647static void snd_atiixp_update_dma(struct atiixp_modem *chip,
648 struct atiixp_dma *dma)
649{
650 if (! dma->substream || ! dma->running)
651 return;
652 snd_pcm_period_elapsed(dma->substream);
653}
654
655/* set BUS_BUSY interrupt bit if any DMA is running */
656/* call with spinlock held */
657static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
658{
659 unsigned int bus_busy;
660 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
661 ATI_REG_CMD_MODEM_RECEIVE_EN))
662 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
663 else
664 bus_busy = 0;
665 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
666}
667
668/* common trigger callback
669 * calling the lowlevel callbacks in it
670 */
671static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
672{
673 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
674 struct atiixp_dma *dma = substream->runtime->private_data;
675 int err = 0;
676
677 if (snd_BUG_ON(!dma->ops->enable_transfer ||
678 !dma->ops->flush_dma))
679 return -EINVAL;
680
681 spin_lock(&chip->reg_lock);
682 switch(cmd) {
683 case SNDRV_PCM_TRIGGER_START:
684 dma->ops->enable_transfer(chip, 1);
685 dma->running = 1;
686 break;
687 case SNDRV_PCM_TRIGGER_STOP:
688 dma->ops->enable_transfer(chip, 0);
689 dma->running = 0;
690 break;
691 default:
692 err = -EINVAL;
693 break;
694 }
695 if (! err) {
696 snd_atiixp_check_bus_busy(chip);
697 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
698 dma->ops->flush_dma(chip);
699 snd_atiixp_check_bus_busy(chip);
700 }
701 }
702 spin_unlock(&chip->reg_lock);
703 return err;
704}
705
706
707/*
708 * lowlevel callbacks for each DMA type
709 *
710 * every callback is supposed to be called in chip->reg_lock spinlock
711 */
712
713/* flush FIFO of analog OUT DMA */
714static void atiixp_out_flush_dma(struct atiixp_modem *chip)
715{
716 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
717}
718
719/* enable/disable analog OUT DMA */
720static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
721{
722 unsigned int data;
723 data = atiixp_read(chip, CMD);
724 if (on) {
725 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
726 return;
727 atiixp_out_flush_dma(chip);
728 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
729 } else
730 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
731 atiixp_write(chip, CMD, data);
732}
733
734/* start/stop transfer over OUT DMA */
735static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
736{
737 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
738 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
739}
740
741/* enable/disable analog IN DMA */
742static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
743{
744 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
745 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
746}
747
748/* start/stop analog IN DMA */
749static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
750{
751 if (on) {
752 unsigned int data = atiixp_read(chip, CMD);
753 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
754 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
755 atiixp_write(chip, CMD, data);
756 }
757 } else
758 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
759}
760
761/* flush FIFO of analog IN DMA */
762static void atiixp_in_flush_dma(struct atiixp_modem *chip)
763{
764 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
765}
766
767/* set up slots and formats for analog OUT */
768static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
769{
770 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
771 unsigned int data;
772
773 spin_lock_irq(&chip->reg_lock);
774 /* set output threshold */
775 data = atiixp_read(chip, MODEM_OUT_FIFO);
776 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
777 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
778 atiixp_write(chip, MODEM_OUT_FIFO, data);
779 spin_unlock_irq(&chip->reg_lock);
780 return 0;
781}
782
783/* set up slots and formats for analog IN */
784static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
785{
786 return 0;
787}
788
789/*
790 * hw_params - allocate the buffer and set up buffer descriptors
791 */
792static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
793 struct snd_pcm_hw_params *hw_params)
794{
795 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
796 struct atiixp_dma *dma = substream->runtime->private_data;
797 int err;
798 int i;
799
800 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
801 if (err < 0)
802 return err;
803 dma->buf_addr = substream->runtime->dma_addr;
804 dma->buf_bytes = params_buffer_bytes(hw_params);
805
806 err = atiixp_build_dma_packets(chip, dma, substream,
807 params_periods(hw_params),
808 params_period_bytes(hw_params));
809 if (err < 0)
810 return err;
811
812 /* set up modem rate */
813 for (i = 0; i < NUM_ATI_CODECS; i++) {
814 if (! chip->ac97[i])
815 continue;
816 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
817 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
818 }
819
820 return err;
821}
822
823static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
824{
825 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
826 struct atiixp_dma *dma = substream->runtime->private_data;
827
828 atiixp_clear_dma_packets(chip, dma, substream);
829 snd_pcm_lib_free_pages(substream);
830 return 0;
831}
832
833
834/*
835 * pcm hardware definition, identical for all DMA types
836 */
837static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
838{
839 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
840 SNDRV_PCM_INFO_BLOCK_TRANSFER |
841 SNDRV_PCM_INFO_MMAP_VALID),
842 .formats = SNDRV_PCM_FMTBIT_S16_LE,
843 .rates = (SNDRV_PCM_RATE_8000 |
844 SNDRV_PCM_RATE_16000 |
845 SNDRV_PCM_RATE_KNOT),
846 .rate_min = 8000,
847 .rate_max = 16000,
848 .channels_min = 2,
849 .channels_max = 2,
850 .buffer_bytes_max = 256 * 1024,
851 .period_bytes_min = 32,
852 .period_bytes_max = 128 * 1024,
853 .periods_min = 2,
854 .periods_max = ATI_MAX_DESCRIPTORS,
855};
856
857static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
858 struct atiixp_dma *dma, int pcm_type)
859{
860 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
861 struct snd_pcm_runtime *runtime = substream->runtime;
862 int err;
863 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
864 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
865 .count = ARRAY_SIZE(rates),
866 .list = rates,
867 .mask = 0,
868 };
869
870 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
871 return -EINVAL;
872
873 if (dma->opened)
874 return -EBUSY;
875 dma->substream = substream;
876 runtime->hw = snd_atiixp_pcm_hw;
877 dma->ac97_pcm_type = pcm_type;
878 if ((err = snd_pcm_hw_constraint_list(runtime, 0,
879 SNDRV_PCM_HW_PARAM_RATE,
880 &hw_constraints_rates)) < 0)
881 return err;
882 if ((err = snd_pcm_hw_constraint_integer(runtime,
883 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
884 return err;
885 runtime->private_data = dma;
886
887 /* enable DMA bits */
888 spin_lock_irq(&chip->reg_lock);
889 dma->ops->enable_dma(chip, 1);
890 spin_unlock_irq(&chip->reg_lock);
891 dma->opened = 1;
892
893 return 0;
894}
895
896static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
897 struct atiixp_dma *dma)
898{
899 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
900 /* disable DMA bits */
901 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
902 return -EINVAL;
903 spin_lock_irq(&chip->reg_lock);
904 dma->ops->enable_dma(chip, 0);
905 spin_unlock_irq(&chip->reg_lock);
906 dma->substream = NULL;
907 dma->opened = 0;
908 return 0;
909}
910
911/*
912 */
913static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
914{
915 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
916 int err;
917
918 mutex_lock(&chip->open_mutex);
919 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
920 mutex_unlock(&chip->open_mutex);
921 if (err < 0)
922 return err;
923 return 0;
924}
925
926static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
927{
928 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
929 int err;
930 mutex_lock(&chip->open_mutex);
931 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
932 mutex_unlock(&chip->open_mutex);
933 return err;
934}
935
936static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
937{
938 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
939 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
940}
941
942static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
943{
944 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
945 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
946}
947
948
949/* AC97 playback */
950static const struct snd_pcm_ops snd_atiixp_playback_ops = {
951 .open = snd_atiixp_playback_open,
952 .close = snd_atiixp_playback_close,
953 .ioctl = snd_pcm_lib_ioctl,
954 .hw_params = snd_atiixp_pcm_hw_params,
955 .hw_free = snd_atiixp_pcm_hw_free,
956 .prepare = snd_atiixp_playback_prepare,
957 .trigger = snd_atiixp_pcm_trigger,
958 .pointer = snd_atiixp_pcm_pointer,
959};
960
961/* AC97 capture */
962static const struct snd_pcm_ops snd_atiixp_capture_ops = {
963 .open = snd_atiixp_capture_open,
964 .close = snd_atiixp_capture_close,
965 .ioctl = snd_pcm_lib_ioctl,
966 .hw_params = snd_atiixp_pcm_hw_params,
967 .hw_free = snd_atiixp_pcm_hw_free,
968 .prepare = snd_atiixp_capture_prepare,
969 .trigger = snd_atiixp_pcm_trigger,
970 .pointer = snd_atiixp_pcm_pointer,
971};
972
973static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
974 .type = ATI_DMA_PLAYBACK,
975 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
976 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
977 .enable_dma = atiixp_out_enable_dma,
978 .enable_transfer = atiixp_out_enable_transfer,
979 .flush_dma = atiixp_out_flush_dma,
980};
981
982static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
983 .type = ATI_DMA_CAPTURE,
984 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
985 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
986 .enable_dma = atiixp_in_enable_dma,
987 .enable_transfer = atiixp_in_enable_transfer,
988 .flush_dma = atiixp_in_flush_dma,
989};
990
991static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
992{
993 struct snd_pcm *pcm;
994 int err;
995
996 /* initialize constants */
997 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
998 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
999
1000 /* PCM #0: analog I/O */
1001 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
1002 if (err < 0)
1003 return err;
1004 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
1005 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
1006 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1007 pcm->private_data = chip;
1008 strcpy(pcm->name, "ATI IXP MC97");
1009 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
1010
1011 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1012 snd_dma_pci_data(chip->pci),
1013 64*1024, 128*1024);
1014
1015 return 0;
1016}
1017
1018
1019
1020/*
1021 * interrupt handler
1022 */
1023static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1024{
1025 struct atiixp_modem *chip = dev_id;
1026 unsigned int status;
1027
1028 status = atiixp_read(chip, ISR);
1029
1030 if (! status)
1031 return IRQ_NONE;
1032
1033 /* process audio DMA */
1034 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1035 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1036 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1037 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1038 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1039 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1040 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1041 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1042
1043 /* for codec detection */
1044 if (status & CODEC_CHECK_BITS) {
1045 unsigned int detected;
1046 detected = status & CODEC_CHECK_BITS;
1047 spin_lock(&chip->reg_lock);
1048 chip->codec_not_ready_bits |= detected;
1049 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1050 spin_unlock(&chip->reg_lock);
1051 }
1052
1053 /* ack */
1054 atiixp_write(chip, ISR, status);
1055
1056 return IRQ_HANDLED;
1057}
1058
1059
1060/*
1061 * ac97 mixer section
1062 */
1063
1064static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1065{
1066 struct snd_ac97_bus *pbus;
1067 struct snd_ac97_template ac97;
1068 int i, err;
1069 int codec_count;
1070 static struct snd_ac97_bus_ops ops = {
1071 .write = snd_atiixp_ac97_write,
1072 .read = snd_atiixp_ac97_read,
1073 };
1074 static unsigned int codec_skip[NUM_ATI_CODECS] = {
1075 ATI_REG_ISR_CODEC0_NOT_READY,
1076 ATI_REG_ISR_CODEC1_NOT_READY,
1077 ATI_REG_ISR_CODEC2_NOT_READY,
1078 };
1079
1080 if (snd_atiixp_codec_detect(chip) < 0)
1081 return -ENXIO;
1082
1083 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1084 return err;
1085 pbus->clock = clock;
1086 chip->ac97_bus = pbus;
1087
1088 codec_count = 0;
1089 for (i = 0; i < NUM_ATI_CODECS; i++) {
1090 if (chip->codec_not_ready_bits & codec_skip[i])
1091 continue;
1092 memset(&ac97, 0, sizeof(ac97));
1093 ac97.private_data = chip;
1094 ac97.pci = chip->pci;
1095 ac97.num = i;
1096 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1097 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1098 chip->ac97[i] = NULL; /* to be sure */
1099 dev_dbg(chip->card->dev,
1100 "codec %d not available for modem\n", i);
1101 continue;
1102 }
1103 codec_count++;
1104 }
1105
1106 if (! codec_count) {
1107 dev_err(chip->card->dev, "no codec available\n");
1108 return -ENODEV;
1109 }
1110
1111 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1112
1113 return 0;
1114}
1115
1116
1117#ifdef CONFIG_PM_SLEEP
1118/*
1119 * power management
1120 */
1121static int snd_atiixp_suspend(struct device *dev)
1122{
1123 struct snd_card *card = dev_get_drvdata(dev);
1124 struct atiixp_modem *chip = card->private_data;
1125 int i;
1126
1127 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1128 for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1129 snd_pcm_suspend_all(chip->pcmdevs[i]);
1130 for (i = 0; i < NUM_ATI_CODECS; i++)
1131 snd_ac97_suspend(chip->ac97[i]);
1132 snd_atiixp_aclink_down(chip);
1133 snd_atiixp_chip_stop(chip);
1134 return 0;
1135}
1136
1137static int snd_atiixp_resume(struct device *dev)
1138{
1139 struct snd_card *card = dev_get_drvdata(dev);
1140 struct atiixp_modem *chip = card->private_data;
1141 int i;
1142
1143 snd_atiixp_aclink_reset(chip);
1144 snd_atiixp_chip_start(chip);
1145
1146 for (i = 0; i < NUM_ATI_CODECS; i++)
1147 snd_ac97_resume(chip->ac97[i]);
1148
1149 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1150 return 0;
1151}
1152
1153static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1154#define SND_ATIIXP_PM_OPS &snd_atiixp_pm
1155#else
1156#define SND_ATIIXP_PM_OPS NULL
1157#endif /* CONFIG_PM_SLEEP */
1158
1159/*
1160 * proc interface for register dump
1161 */
1162
1163static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1164 struct snd_info_buffer *buffer)
1165{
1166 struct atiixp_modem *chip = entry->private_data;
1167 int i;
1168
1169 for (i = 0; i < 256; i += 4)
1170 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1171}
1172
1173static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1174{
1175 struct snd_info_entry *entry;
1176
1177 if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1178 snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1179}
1180
1181
1182/*
1183 * destructor
1184 */
1185
1186static int snd_atiixp_free(struct atiixp_modem *chip)
1187{
1188 if (chip->irq < 0)
1189 goto __hw_end;
1190 snd_atiixp_chip_stop(chip);
1191
1192 __hw_end:
1193 if (chip->irq >= 0)
1194 free_irq(chip->irq, chip);
1195 iounmap(chip->remap_addr);
1196 pci_release_regions(chip->pci);
1197 pci_disable_device(chip->pci);
1198 kfree(chip);
1199 return 0;
1200}
1201
1202static int snd_atiixp_dev_free(struct snd_device *device)
1203{
1204 struct atiixp_modem *chip = device->device_data;
1205 return snd_atiixp_free(chip);
1206}
1207
1208/*
1209 * constructor for chip instance
1210 */
1211static int snd_atiixp_create(struct snd_card *card,
1212 struct pci_dev *pci,
1213 struct atiixp_modem **r_chip)
1214{
1215 static struct snd_device_ops ops = {
1216 .dev_free = snd_atiixp_dev_free,
1217 };
1218 struct atiixp_modem *chip;
1219 int err;
1220
1221 if ((err = pci_enable_device(pci)) < 0)
1222 return err;
1223
1224 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1225 if (chip == NULL) {
1226 pci_disable_device(pci);
1227 return -ENOMEM;
1228 }
1229
1230 spin_lock_init(&chip->reg_lock);
1231 mutex_init(&chip->open_mutex);
1232 chip->card = card;
1233 chip->pci = pci;
1234 chip->irq = -1;
1235 if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1236 kfree(chip);
1237 pci_disable_device(pci);
1238 return err;
1239 }
1240 chip->addr = pci_resource_start(pci, 0);
1241 chip->remap_addr = pci_ioremap_bar(pci, 0);
1242 if (chip->remap_addr == NULL) {
1243 dev_err(card->dev, "AC'97 space ioremap problem\n");
1244 snd_atiixp_free(chip);
1245 return -EIO;
1246 }
1247
1248 if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1249 KBUILD_MODNAME, chip)) {
1250 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1251 snd_atiixp_free(chip);
1252 return -EBUSY;
1253 }
1254 chip->irq = pci->irq;
1255 pci_set_master(pci);
1256 synchronize_irq(chip->irq);
1257
1258 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1259 snd_atiixp_free(chip);
1260 return err;
1261 }
1262
1263 *r_chip = chip;
1264 return 0;
1265}
1266
1267
1268static int snd_atiixp_probe(struct pci_dev *pci,
1269 const struct pci_device_id *pci_id)
1270{
1271 struct snd_card *card;
1272 struct atiixp_modem *chip;
1273 int err;
1274
1275 err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1276 if (err < 0)
1277 return err;
1278
1279 strcpy(card->driver, "ATIIXP-MODEM");
1280 strcpy(card->shortname, "ATI IXP Modem");
1281 if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1282 goto __error;
1283 card->private_data = chip;
1284
1285 if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1286 goto __error;
1287
1288 if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1289 goto __error;
1290
1291 if ((err = snd_atiixp_pcm_new(chip)) < 0)
1292 goto __error;
1293
1294 snd_atiixp_proc_init(chip);
1295
1296 snd_atiixp_chip_start(chip);
1297
1298 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1299 card->shortname, pci->revision, chip->addr, chip->irq);
1300
1301 if ((err = snd_card_register(card)) < 0)
1302 goto __error;
1303
1304 pci_set_drvdata(pci, card);
1305 return 0;
1306
1307 __error:
1308 snd_card_free(card);
1309 return err;
1310}
1311
1312static void snd_atiixp_remove(struct pci_dev *pci)
1313{
1314 snd_card_free(pci_get_drvdata(pci));
1315}
1316
1317static struct pci_driver atiixp_modem_driver = {
1318 .name = KBUILD_MODNAME,
1319 .id_table = snd_atiixp_ids,
1320 .probe = snd_atiixp_probe,
1321 .remove = snd_atiixp_remove,
1322 .driver = {
1323 .pm = SND_ATIIXP_PM_OPS,
1324 },
1325};
1326
1327module_pci_driver(atiixp_modem_driver);