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
23 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
24 MODULE_DESCRIPTION("ATI IXP MC97 controller");
25 MODULE_LICENSE("GPL");
26
27 static int index = -2; /* Exclude the first card */
28 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
29 static int ac97_clock = 48000;
30
31 module_param(index, int, 0444);
32 MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
33 module_param(id, charp, 0444);
34 MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
35 module_param(ac97_clock, int, 0444);
36 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
37
38 /* just for backward compatibility */
39 static bool enable;
40 module_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
164 struct atiixp_modem;
165
166 /*
167 * DMA packate descriptor
168 */
169
170 struct 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 */
180 enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
181 enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
182 enum { 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 */
190 struct 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 */
205 struct 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 */
220 struct 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 */
249 static 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
255 MODULE_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 */
snd_atiixp_update_bits(struct atiixp_modem * chip,unsigned int reg,unsigned int mask,unsigned int value)266 static 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 */
atiixp_build_dma_packets(struct atiixp_modem * chip,struct atiixp_dma * dma,struct snd_pcm_substream * substream,unsigned int periods,unsigned int period_bytes)309 static 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 */
atiixp_clear_dma_packets(struct atiixp_modem * chip,struct atiixp_dma * dma,struct snd_pcm_substream * substream)368 static 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 */
snd_atiixp_acquire_codec(struct atiixp_modem * chip)382 static 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
snd_atiixp_codec_read(struct atiixp_modem * chip,unsigned short codec,unsigned short reg)396 static 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
snd_atiixp_codec_write(struct atiixp_modem * chip,unsigned short codec,unsigned short reg,unsigned short val)426 static 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
snd_atiixp_ac97_read(struct snd_ac97 * ac97,unsigned short reg)441 static 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
snd_atiixp_ac97_write(struct snd_ac97 * ac97,unsigned short reg,unsigned short val)449 static 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 */
snd_atiixp_aclink_reset(struct atiixp_modem * chip)464 static 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
snd_atiixp_aclink_down(struct atiixp_modem * chip)500 static 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
snd_atiixp_codec_detect(struct atiixp_modem * chip)525 static 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 */
snd_atiixp_chip_start(struct atiixp_modem * chip)551 static 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 */
snd_atiixp_chip_stop(struct atiixp_modem * chip)576 static 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 */
snd_atiixp_pcm_pointer(struct snd_pcm_substream * substream)595 static 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 */
snd_atiixp_xrun_dma(struct atiixp_modem * chip,struct atiixp_dma * dma)620 static 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 */
snd_atiixp_update_dma(struct atiixp_modem * chip,struct atiixp_dma * dma)632 static 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 */
snd_atiixp_check_bus_busy(struct atiixp_modem * chip)642 static 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 */
snd_atiixp_pcm_trigger(struct snd_pcm_substream * substream,int cmd)656 static 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 */
atiixp_out_flush_dma(struct atiixp_modem * chip)699 static 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 */
atiixp_out_enable_dma(struct atiixp_modem * chip,int on)705 static 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 */
atiixp_out_enable_transfer(struct atiixp_modem * chip,int on)720 static 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 */
atiixp_in_enable_dma(struct atiixp_modem * chip,int on)727 static 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 */
atiixp_in_enable_transfer(struct atiixp_modem * chip,int on)734 static 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 */
atiixp_in_flush_dma(struct atiixp_modem * chip)747 static 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 */
snd_atiixp_playback_prepare(struct snd_pcm_substream * substream)753 static 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 */
snd_atiixp_capture_prepare(struct snd_pcm_substream * substream)769 static 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 */
snd_atiixp_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)777 static 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
snd_atiixp_pcm_hw_free(struct snd_pcm_substream * substream)805 static 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 */
818 static 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
snd_atiixp_pcm_open(struct snd_pcm_substream * substream,struct atiixp_dma * dma,int pcm_type)838 static 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
snd_atiixp_pcm_close(struct snd_pcm_substream * substream,struct atiixp_dma * dma)877 static 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 */
snd_atiixp_playback_open(struct snd_pcm_substream * substream)894 static 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
snd_atiixp_playback_close(struct snd_pcm_substream * substream)907 static 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
snd_atiixp_capture_open(struct snd_pcm_substream * substream)917 static 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
snd_atiixp_capture_close(struct snd_pcm_substream * substream)923 static 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 */
931 static 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 */
942 static 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
952 static 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
961 static 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
snd_atiixp_pcm_new(struct atiixp_modem * chip)970 static 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 */
snd_atiixp_interrupt(int irq,void * dev_id)1001 static 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
snd_atiixp_mixer_new(struct atiixp_modem * chip,int clock)1042 static 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 */
snd_atiixp_suspend(struct device * dev)1101 static 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
snd_atiixp_resume(struct device * dev)1115 static 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
1131 static 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
snd_atiixp_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)1141 static 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
snd_atiixp_proc_init(struct atiixp_modem * chip)1151 static 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
snd_atiixp_free(struct snd_card * card)1162 static 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 */
snd_atiixp_init(struct snd_card * card,struct pci_dev * pci)1170 static 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
__snd_atiixp_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)1204 static 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
snd_atiixp_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)1250 static 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
1256 static 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
1265 module_pci_driver(atiixp_modem_driver);
1266