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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");
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);
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 <asm/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 DEFINE_PCI_DEVICE_TABLE(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 snd_printk(KERN_WARNING "atiixp-modem: 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 snd_printk(KERN_WARNING "atiixp-modem: 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 snd_printk(KERN_ERR "atiixp-modem: 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
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 snd_printk(KERN_ERR "atiixp-modem: 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 snd_printd("atiixp-modem: 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 snd_printdd("atiixp-modem: XRUN detected (DMA %d)\n", dma->ops->type);
641 snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
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 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 unsigned int rates[] = { 8000, 9600, 12000, 16000 };
864 static 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 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 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 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 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 __devinit 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 __devinit 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 snd_printdd("atiixp-modem: codec %d not available for modem\n", i);
1100 continue;
1101 }
1102 codec_count++;
1103 }
1104
1105 if (! codec_count) {
1106 snd_printk(KERN_ERR "atiixp-modem: no codec available\n");
1107 return -ENODEV;
1108 }
1109
1110 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1111
1112 return 0;
1113}
1114
1115
1116#ifdef CONFIG_PM
1117/*
1118 * power management
1119 */
1120static int snd_atiixp_suspend(struct pci_dev *pci, pm_message_t state)
1121{
1122 struct snd_card *card = pci_get_drvdata(pci);
1123 struct atiixp_modem *chip = card->private_data;
1124 int i;
1125
1126 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1127 for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1128 snd_pcm_suspend_all(chip->pcmdevs[i]);
1129 for (i = 0; i < NUM_ATI_CODECS; i++)
1130 snd_ac97_suspend(chip->ac97[i]);
1131 snd_atiixp_aclink_down(chip);
1132 snd_atiixp_chip_stop(chip);
1133
1134 pci_disable_device(pci);
1135 pci_save_state(pci);
1136 pci_set_power_state(pci, pci_choose_state(pci, state));
1137 return 0;
1138}
1139
1140static int snd_atiixp_resume(struct pci_dev *pci)
1141{
1142 struct snd_card *card = pci_get_drvdata(pci);
1143 struct atiixp_modem *chip = card->private_data;
1144 int i;
1145
1146 pci_set_power_state(pci, PCI_D0);
1147 pci_restore_state(pci);
1148 if (pci_enable_device(pci) < 0) {
1149 printk(KERN_ERR "atiixp-modem: pci_enable_device failed, "
1150 "disabling device\n");
1151 snd_card_disconnect(card);
1152 return -EIO;
1153 }
1154 pci_set_master(pci);
1155
1156 snd_atiixp_aclink_reset(chip);
1157 snd_atiixp_chip_start(chip);
1158
1159 for (i = 0; i < NUM_ATI_CODECS; i++)
1160 snd_ac97_resume(chip->ac97[i]);
1161
1162 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1163 return 0;
1164}
1165#endif /* CONFIG_PM */
1166
1167
1168#ifdef CONFIG_PROC_FS
1169/*
1170 * proc interface for register dump
1171 */
1172
1173static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1174 struct snd_info_buffer *buffer)
1175{
1176 struct atiixp_modem *chip = entry->private_data;
1177 int i;
1178
1179 for (i = 0; i < 256; i += 4)
1180 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1181}
1182
1183static void __devinit snd_atiixp_proc_init(struct atiixp_modem *chip)
1184{
1185 struct snd_info_entry *entry;
1186
1187 if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1188 snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1189}
1190#else
1191#define snd_atiixp_proc_init(chip)
1192#endif
1193
1194
1195/*
1196 * destructor
1197 */
1198
1199static int snd_atiixp_free(struct atiixp_modem *chip)
1200{
1201 if (chip->irq < 0)
1202 goto __hw_end;
1203 snd_atiixp_chip_stop(chip);
1204
1205 __hw_end:
1206 if (chip->irq >= 0)
1207 free_irq(chip->irq, chip);
1208 if (chip->remap_addr)
1209 iounmap(chip->remap_addr);
1210 pci_release_regions(chip->pci);
1211 pci_disable_device(chip->pci);
1212 kfree(chip);
1213 return 0;
1214}
1215
1216static int snd_atiixp_dev_free(struct snd_device *device)
1217{
1218 struct atiixp_modem *chip = device->device_data;
1219 return snd_atiixp_free(chip);
1220}
1221
1222/*
1223 * constructor for chip instance
1224 */
1225static int __devinit snd_atiixp_create(struct snd_card *card,
1226 struct pci_dev *pci,
1227 struct atiixp_modem **r_chip)
1228{
1229 static struct snd_device_ops ops = {
1230 .dev_free = snd_atiixp_dev_free,
1231 };
1232 struct atiixp_modem *chip;
1233 int err;
1234
1235 if ((err = pci_enable_device(pci)) < 0)
1236 return err;
1237
1238 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1239 if (chip == NULL) {
1240 pci_disable_device(pci);
1241 return -ENOMEM;
1242 }
1243
1244 spin_lock_init(&chip->reg_lock);
1245 mutex_init(&chip->open_mutex);
1246 chip->card = card;
1247 chip->pci = pci;
1248 chip->irq = -1;
1249 if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1250 kfree(chip);
1251 pci_disable_device(pci);
1252 return err;
1253 }
1254 chip->addr = pci_resource_start(pci, 0);
1255 chip->remap_addr = pci_ioremap_bar(pci, 0);
1256 if (chip->remap_addr == NULL) {
1257 snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
1258 snd_atiixp_free(chip);
1259 return -EIO;
1260 }
1261
1262 if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1263 KBUILD_MODNAME, chip)) {
1264 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1265 snd_atiixp_free(chip);
1266 return -EBUSY;
1267 }
1268 chip->irq = pci->irq;
1269 pci_set_master(pci);
1270 synchronize_irq(chip->irq);
1271
1272 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1273 snd_atiixp_free(chip);
1274 return err;
1275 }
1276
1277 snd_card_set_dev(card, &pci->dev);
1278
1279 *r_chip = chip;
1280 return 0;
1281}
1282
1283
1284static int __devinit snd_atiixp_probe(struct pci_dev *pci,
1285 const struct pci_device_id *pci_id)
1286{
1287 struct snd_card *card;
1288 struct atiixp_modem *chip;
1289 int err;
1290
1291 err = snd_card_create(index, id, THIS_MODULE, 0, &card);
1292 if (err < 0)
1293 return err;
1294
1295 strcpy(card->driver, "ATIIXP-MODEM");
1296 strcpy(card->shortname, "ATI IXP Modem");
1297 if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1298 goto __error;
1299 card->private_data = chip;
1300
1301 if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1302 goto __error;
1303
1304 if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1305 goto __error;
1306
1307 if ((err = snd_atiixp_pcm_new(chip)) < 0)
1308 goto __error;
1309
1310 snd_atiixp_proc_init(chip);
1311
1312 snd_atiixp_chip_start(chip);
1313
1314 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1315 card->shortname, pci->revision, chip->addr, chip->irq);
1316
1317 if ((err = snd_card_register(card)) < 0)
1318 goto __error;
1319
1320 pci_set_drvdata(pci, card);
1321 return 0;
1322
1323 __error:
1324 snd_card_free(card);
1325 return err;
1326}
1327
1328static void __devexit snd_atiixp_remove(struct pci_dev *pci)
1329{
1330 snd_card_free(pci_get_drvdata(pci));
1331 pci_set_drvdata(pci, NULL);
1332}
1333
1334static struct pci_driver atiixp_modem_driver = {
1335 .name = KBUILD_MODNAME,
1336 .id_table = snd_atiixp_ids,
1337 .probe = snd_atiixp_probe,
1338 .remove = __devexit_p(snd_atiixp_remove),
1339#ifdef CONFIG_PM
1340 .suspend = snd_atiixp_suspend,
1341 .resume = snd_atiixp_resume,
1342#endif
1343};
1344
1345module_pci_driver(atiixp_modem_driver);