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microblaze: Remove redundant variable
[linux-2.6/mini2440.git] / sound / pci / atiixp_modem.c
blobc3136cccc559e86f90f978d9bb922ae305c5d140
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/moduleparam.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
37 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
38 MODULE_DESCRIPTION("ATI IXP MC97 controller");
39 MODULE_LICENSE("GPL");
40 MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
41
42 static int index = -2; /* Exclude the first card */
43 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
44 static int ac97_clock = 48000;
45
46 module_param(index, int, 0444);
47 MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
48 module_param(id, charp, 0444);
49 MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
50 module_param(ac97_clock, int, 0444);
51 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
52
53 /* just for backward compatibility */
54 static int enable;
55 module_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
179 struct atiixp_modem;
180
181 /*
182 * DMA packate descriptor
183 */
184
185 struct 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 */
195 enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
196 enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
197 enum { 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 */
205 struct 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 */
220 struct 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 */
235 struct 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 */
264 static struct pci_device_id snd_atiixp_ids[] = {
265 { 0x1002, 0x434d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB200 */
266 { 0x1002, 0x4378, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB400 */
267 { 0, }
268 };
269
270 MODULE_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 */
281 static 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 */
324 static 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 */
383 static 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 */
397 static 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
411 static 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
441 static 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
456 static 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
464 static 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 */
479 static 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
515 static 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
540 static 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 */
566 static 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 */
591 static 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 */
610 static 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 */
635 static 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 */
647 static 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 */
657 static 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 */
671 static 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 */
714 static 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 */
720 static 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 */
735 static 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 */
742 static 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 */
749 static 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 */
762 static 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 */
768 static 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 */
784 static 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 */
792 static 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
823 static 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 */
837 static 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
857 static 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
896 static 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 */
913 static 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
926 static 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
936 static 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
942 static 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 */
950 static 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 */
962 static 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
973 static 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
982 static 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
991 static 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 */
1023 static 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
1064 static 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 */
1120 static 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
1140 static 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
1173 static 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
1183 static 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
1199 static 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
1216 static 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 */
1225 static 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 card->shortname, 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
1284 static 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
1328 static 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
1334 static struct pci_driver driver = {
1335 .name = "ATI IXP MC97 controller",
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
1345
1346 static int __init alsa_card_atiixp_init(void)
1347 {
1348 return pci_register_driver(&driver);
1349 }
1350
1351 static void __exit alsa_card_atiixp_exit(void)
1352 {
1353 pci_unregister_driver(&driver);
1354 }
1355
1356 module_init(alsa_card_atiixp_init)
1357 module_exit(alsa_card_atiixp_exit)
Support for the Chinese Samsung S3C2440 based development boards