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Merge tag 'probes-fixes-v6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / sound / pci / atiixp_modem.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
4 *
5 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
1da177e4
LT		 6 */
7
6cbbfe1c 8#include <linux/io.h>
1da177e4
LT		 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>
65a77217 14#include <linux/module.h>
62932df8 15#include <linux/mutex.h>
1da177e4
LT		 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");
1da177e4 26
b7fe4622
CL		 27static int index = -2; /* Exclude the first card */
28static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
29static int ac97_clock = 48000;
1da177e4 30
b7fe4622 31module_param(index, int, 0444);
1da177e4 32MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
b7fe4622 33module_param(id, charp, 0444);
1da177e4 34MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
b7fe4622 35module_param(ac97_clock, int, 0444);
1da177e4
LT		 36MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
37
2b3e584b 38/* just for backward compatibility */
a67ff6a5 39static bool enable;
698444f3 40module_param(enable, bool, 0444);
2b3e584b 41
1da177e4
LT		 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
74ee4ff1 164struct atiixp_modem;
1da177e4
LT		 165
166/*
167 * DMA packate descriptor
168 */
169
74ee4ff1 170struct atiixp_dma_desc {
7e49aadf 171 __le32 addr; /* DMA buffer address */
1da177e4
LT		 172 u16 status; /* status bits */
173 u16 size; /* size of the packet in dwords */
7e49aadf 174 __le32 next; /* address of the next packet descriptor */
74ee4ff1 175};
1da177e4
LT		 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 */
74ee4ff1 190struct atiixp_dma_ops {
1da177e4
LT		 191 int type; /* ATI_DMA_XXX */
192 unsigned int llp_offset; /* LINKPTR offset */
193 unsigned int dt_cur; /* DT_CUR offset */
74ee4ff1
TI		 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);
1da177e4
LT		 200};
201
202/*
203 * DMA stream
204 */
74ee4ff1
TI		 205struct atiixp_dma {
206 const struct atiixp_dma_ops *ops;
1da177e4 207 struct snd_dma_buffer desc_buf;
74ee4ff1 208 struct snd_pcm_substream *substream; /* assigned PCM substream */
1da177e4
LT		 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 */
74ee4ff1
TI		 220struct atiixp_modem {
221 struct snd_card *card;
1da177e4
LT		 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
74ee4ff1
TI		 229 struct snd_ac97_bus *ac97_bus;
230 struct snd_ac97 *ac97[NUM_ATI_CODECS];
1da177e4
LT		 231
232 spinlock_t reg_lock;
233
74ee4ff1 234 struct atiixp_dma dmas[NUM_ATI_DMAS];
1da177e4 235 struct ac97_pcm *pcms[NUM_ATI_PCMS];
74ee4ff1 236 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
1da177e4
LT		 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 */
62932df8 243 struct mutex open_mutex; /* playback open mutex */
1da177e4
LT		 244};
245
246
247/*
248 */
9baa3c34 249static const struct pci_device_id snd_atiixp_ids[] = {
28d27aae
JP		 250 { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
251 { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
1da177e4
LT		 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 */
74ee4ff1
TI		 266static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
267 unsigned int mask, unsigned int value)
1da177e4
LT		 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
1da177e4
LT		 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 \
74ee4ff1 298 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
1da177e4
LT		 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 */
74ee4ff1
TI		 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)
1da177e4
LT		 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) {
6974f8ad 323 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
1da177e4
LT		 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++) {
74ee4ff1
TI		 343 struct atiixp_dma_desc *desc;
344 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
1da177e4
LT		 345 desc->addr = cpu_to_le32(addr);
346 desc->status = 0;
347 desc->size = period_bytes >> 2; /* in dwords */
74ee4ff1 348 desc_addr += sizeof(struct atiixp_dma_desc);
1da177e4
LT		 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 */
74ee4ff1
TI		 368static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
369 struct atiixp_dma *dma,
370 struct snd_pcm_substream *substream)
1da177e4
LT		 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 */
74ee4ff1 382static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
1da177e4
LT		 383{
384 int timeout = 1000;
385
386 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
387 if (! timeout--) {
ca6aafd8 388 dev_warn(chip->card->dev, "codec acquire timeout\n");
1da177e4
LT		 389 return -EBUSY;
390 }
391 udelay(1);
392 }
393 return 0;
394}
395
74ee4ff1
TI		 396static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
397 unsigned short codec,
398 unsigned short reg)
1da177e4
LT		 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)
ca6aafd8 421 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
1da177e4
LT		 422 return 0xffff;
423}
424
425
74ee4ff1
TI		 426static void snd_atiixp_codec_write(struct atiixp_modem *chip,
427 unsigned short codec,
428 unsigned short reg, unsigned short val)
1da177e4
LT		 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
74ee4ff1
TI		 441static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
442 unsigned short reg)
1da177e4 443{
74ee4ff1 444 struct atiixp_modem *chip = ac97->private_data;
1da177e4
LT		 445 return snd_atiixp_codec_read(chip, ac97->num, reg);
446
447}
448
74ee4ff1
TI		 449static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
450 unsigned short val)
1da177e4 451{
74ee4ff1 452 struct atiixp_modem *chip = ac97->private_data;
83a5b72a
SK		 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 }
1da177e4
LT		 458 snd_atiixp_codec_write(chip, ac97->num, reg, val);
459}
460
461/*
462 * reset AC link
463 */
74ee4ff1 464static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
1da177e4
LT		 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);
bfdcbace 484 msleep(1);
1da177e4 485 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
7e79443c 486 if (!--timeout) {
ca6aafd8 487 dev_err(chip->card->dev, "codec reset timeout\n");
1da177e4
LT		 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
74ee4ff1 499static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
1da177e4
LT		 500{
501 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
502 // return -EBUSY;
503 atiixp_update(chip, CMD,
504 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
505 ATI_REG_CMD_POWERDOWN);
506 return 0;
507}
1da177e4
LT		 508
509/*
510 * auto-detection of codecs
511 *
512 * the IXP chip can generate interrupts for the non-existing codecs.
513 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
514 * even if all three codecs are connected.
515 */
516
517#define ALL_CODEC_NOT_READY \
518 (ATI_REG_ISR_CODEC0_NOT_READY |\
519 ATI_REG_ISR_CODEC1_NOT_READY |\
520 ATI_REG_ISR_CODEC2_NOT_READY)
521#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
522
74ee4ff1 523static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
1da177e4
LT		 524{
525 int timeout;
526
527 chip->codec_not_ready_bits = 0;
528 atiixp_write(chip, IER, CODEC_CHECK_BITS);
529 /* wait for the interrupts */
bfdcbace 530 timeout = 50;
1da177e4 531 while (timeout-- > 0) {
bfdcbace 532 msleep(1);
1da177e4
LT		 533 if (chip->codec_not_ready_bits)
534 break;
535 }
536 atiixp_write(chip, IER, 0); /* disable irqs */
537
538 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
ca6aafd8 539 dev_err(chip->card->dev, "no codec detected!\n");
1da177e4
LT		 540 return -ENXIO;
541 }
542 return 0;
543}
544
545
546/*
547 * enable DMA and irqs
548 */
74ee4ff1 549static int snd_atiixp_chip_start(struct atiixp_modem *chip)
1da177e4
LT		 550{
551 unsigned int reg;
552
553 /* set up spdif, enable burst mode */
554 reg = atiixp_read(chip, CMD);
555 reg |= ATI_REG_CMD_BURST_EN;
556 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
557 reg |= ATI_REG_CMD_MODEM_PRESENT;
558 atiixp_write(chip, CMD, reg);
559
560 /* clear all interrupt source */
561 atiixp_write(chip, ISR, 0xffffffff);
562 /* enable irqs */
563 atiixp_write(chip, IER,
564 ATI_REG_IER_MODEM_STATUS_EN |
565 ATI_REG_IER_MODEM_IN_XRUN_EN |
566 ATI_REG_IER_MODEM_OUT1_XRUN_EN);
567 return 0;
568}
569
570
571/*
572 * disable DMA and IRQs
573 */
74ee4ff1 574static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
1da177e4
LT		 575{
576 /* clear interrupt source */
577 atiixp_write(chip, ISR, atiixp_read(chip, ISR));
578 /* disable irqs */
579 atiixp_write(chip, IER, 0);
580 return 0;
581}
582
583
584/*
585 * PCM section
586 */
587
588/*
589 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
590 * position. when SG-buffer is implemented, the offset must be calculated
591 * correctly...
592 */
74ee4ff1 593static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 594{
74ee4ff1
TI		 595 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
596 struct snd_pcm_runtime *runtime = substream->runtime;
597 struct atiixp_dma *dma = runtime->private_data;
1da177e4
LT		 598 unsigned int curptr;
599 int timeout = 1000;
600
601 while (timeout--) {
602 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
603 if (curptr < dma->buf_addr)
604 continue;
605 curptr -= dma->buf_addr;
606 if (curptr >= dma->buf_bytes)
607 continue;
608 return bytes_to_frames(runtime, curptr);
609 }
ca6aafd8 610 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
1da177e4
LT		 611 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
612 return 0;
613}
614
615/*
616 * XRUN detected, and stop the PCM substream
617 */
74ee4ff1
TI		 618static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
619 struct atiixp_dma *dma)
1da177e4
LT		 620{
621 if (! dma->substream || ! dma->running)
622 return;
ca6aafd8 623 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
1fb8510c 624 snd_pcm_stop_xrun(dma->substream);
1da177e4
LT		 625}
626
627/*
628 * the period ack. update the substream.
629 */
74ee4ff1
TI		 630static void snd_atiixp_update_dma(struct atiixp_modem *chip,
631 struct atiixp_dma *dma)
1da177e4
LT		 632{
633 if (! dma->substream || ! dma->running)
634 return;
635 snd_pcm_period_elapsed(dma->substream);
636}
637
638/* set BUS_BUSY interrupt bit if any DMA is running */
639/* call with spinlock held */
74ee4ff1 640static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
1da177e4
LT		 641{
642 unsigned int bus_busy;
643 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
644 ATI_REG_CMD_MODEM_RECEIVE_EN))
645 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
646 else
647 bus_busy = 0;
648 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
649}
650
651/* common trigger callback
652 * calling the lowlevel callbacks in it
653 */
74ee4ff1 654static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1da177e4 655{
74ee4ff1
TI		 656 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
657 struct atiixp_dma *dma = substream->runtime->private_data;
83a5b72a 658 int err = 0;
1da177e4 659
da3cec35
TI		 660 if (snd_BUG_ON(!dma->ops->enable_transfer ||
661 !dma->ops->flush_dma))
662 return -EINVAL;
1da177e4 663
1da177e4 664 spin_lock(&chip->reg_lock);
83a5b72a
SK		 665 switch(cmd) {
666 case SNDRV_PCM_TRIGGER_START:
1da177e4
LT		 667 dma->ops->enable_transfer(chip, 1);
668 dma->running = 1;
83a5b72a
SK		 669 break;
670 case SNDRV_PCM_TRIGGER_STOP:
1da177e4
LT		 671 dma->ops->enable_transfer(chip, 0);
672 dma->running = 0;
83a5b72a
SK		 673 break;
674 default:
675 err = -EINVAL;
676 break;
1da177e4 677 }
83a5b72a 678 if (! err) {
1da177e4
LT		 679 snd_atiixp_check_bus_busy(chip);
680 if (cmd == SNDRV_PCM_TRIGGER_STOP) {
681 dma->ops->flush_dma(chip);
682 snd_atiixp_check_bus_busy(chip);
683 }
83a5b72a 684 }
1da177e4 685 spin_unlock(&chip->reg_lock);
83a5b72a 686 return err;
1da177e4
LT		 687}
688
689
690/*
691 * lowlevel callbacks for each DMA type
692 *
693 * every callback is supposed to be called in chip->reg_lock spinlock
694 */
695
696/* flush FIFO of analog OUT DMA */
74ee4ff1 697static void atiixp_out_flush_dma(struct atiixp_modem *chip)
1da177e4
LT		 698{
699 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
700}
701
702/* enable/disable analog OUT DMA */
74ee4ff1 703static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
1da177e4
LT		 704{
705 unsigned int data;
706 data = atiixp_read(chip, CMD);
707 if (on) {
708 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
709 return;
710 atiixp_out_flush_dma(chip);
711 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
712 } else
713 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
714 atiixp_write(chip, CMD, data);
715}
716
717/* start/stop transfer over OUT DMA */
74ee4ff1 718static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
1da177e4
LT		 719{
720 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
721 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
722}
723
724/* enable/disable analog IN DMA */
74ee4ff1 725static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
1da177e4
LT		 726{
727 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
728 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
729}
730
731/* start/stop analog IN DMA */
74ee4ff1 732static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
1da177e4
LT		 733{
734 if (on) {
735 unsigned int data = atiixp_read(chip, CMD);
736 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
737 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
738 atiixp_write(chip, CMD, data);
739 }
740 } else
741 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
742}
743
744/* flush FIFO of analog IN DMA */
74ee4ff1 745static void atiixp_in_flush_dma(struct atiixp_modem *chip)
1da177e4
LT		 746{
747 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
748}
749
750/* set up slots and formats for analog OUT */
74ee4ff1 751static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
1da177e4 752{
74ee4ff1 753 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
1da177e4
LT		 754 unsigned int data;
755
756 spin_lock_irq(&chip->reg_lock);
757 /* set output threshold */
758 data = atiixp_read(chip, MODEM_OUT_FIFO);
759 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
760 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
761 atiixp_write(chip, MODEM_OUT_FIFO, data);
762 spin_unlock_irq(&chip->reg_lock);
763 return 0;
764}
765
766/* set up slots and formats for analog IN */
74ee4ff1 767static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
1da177e4
LT		 768{
769 return 0;
770}
771
772/*
773 * hw_params - allocate the buffer and set up buffer descriptors
774 */
74ee4ff1
TI		 775static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
776 struct snd_pcm_hw_params *hw_params)
1da177e4 777{
74ee4ff1
TI		 778 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
779 struct atiixp_dma *dma = substream->runtime->private_data;
1da177e4
LT		 780 int err;
781 int i;
782
1da177e4
LT		 783 dma->buf_addr = substream->runtime->dma_addr;
784 dma->buf_bytes = params_buffer_bytes(hw_params);
785
786 err = atiixp_build_dma_packets(chip, dma, substream,
787 params_periods(hw_params),
788 params_period_bytes(hw_params));
789 if (err < 0)
790 return err;
791
792 /* set up modem rate */
793 for (i = 0; i < NUM_ATI_CODECS; i++) {
794 if (! chip->ac97[i])
795 continue;
796 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
797 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
798 }
799
800 return err;
801}
802
74ee4ff1 803static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 804{
74ee4ff1
TI		 805 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
806 struct atiixp_dma *dma = substream->runtime->private_data;
1da177e4
LT		 807
808 atiixp_clear_dma_packets(chip, dma, substream);
1da177e4
LT		 809 return 0;
810}
811
812
813/*
814 * pcm hardware definition, identical for all DMA types
815 */
dee49895 816static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
1da177e4
LT		 817{
818 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
819 SNDRV_PCM_INFO_BLOCK_TRANSFER |
820 SNDRV_PCM_INFO_MMAP_VALID),
821 .formats = SNDRV_PCM_FMTBIT_S16_LE,
74ee4ff1
TI		 822 .rates = (SNDRV_PCM_RATE_8000 |
823 SNDRV_PCM_RATE_16000 |
824 SNDRV_PCM_RATE_KNOT),
1da177e4
LT		 825 .rate_min = 8000,
826 .rate_max = 16000,
827 .channels_min = 2,
828 .channels_max = 2,
829 .buffer_bytes_max = 256 * 1024,
830 .period_bytes_min = 32,
831 .period_bytes_max = 128 * 1024,
832 .periods_min = 2,
833 .periods_max = ATI_MAX_DESCRIPTORS,
834};
835
74ee4ff1
TI		 836static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
837 struct atiixp_dma *dma, int pcm_type)
1da177e4 838{
74ee4ff1
TI		 839 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
840 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 841 int err;
c15ec07b
TI		 842 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };
843 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
1da177e4
LT		 844 .count = ARRAY_SIZE(rates),
845 .list = rates,
846 .mask = 0,
847 };
848
da3cec35
TI		 849 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
850 return -EINVAL;
1da177e4
LT		 851
852 if (dma->opened)
853 return -EBUSY;
854 dma->substream = substream;
855 runtime->hw = snd_atiixp_pcm_hw;
856 dma->ac97_pcm_type = pcm_type;
b83bea38
TI		 857 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
858 &hw_constraints_rates);
859 if (err < 0)
1da177e4 860 return err;
b83bea38
TI		 861 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
862 if (err < 0)
1da177e4
LT		 863 return err;
864 runtime->private_data = dma;
865
866 /* enable DMA bits */
867 spin_lock_irq(&chip->reg_lock);
868 dma->ops->enable_dma(chip, 1);
869 spin_unlock_irq(&chip->reg_lock);
870 dma->opened = 1;
871
872 return 0;
873}
874
74ee4ff1
TI		 875static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
876 struct atiixp_dma *dma)
1da177e4 877{
74ee4ff1 878 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
1da177e4 879 /* disable DMA bits */
da3cec35
TI		 880 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
881 return -EINVAL;
1da177e4
LT		 882 spin_lock_irq(&chip->reg_lock);
883 dma->ops->enable_dma(chip, 0);
884 spin_unlock_irq(&chip->reg_lock);
885 dma->substream = NULL;
886 dma->opened = 0;
887 return 0;
888}
889
890/*
891 */
74ee4ff1 892static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
1da177e4 893{
74ee4ff1 894 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
1da177e4
LT		 895 int err;
896
62932df8 897 mutex_lock(&chip->open_mutex);
1da177e4 898 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
62932df8 899 mutex_unlock(&chip->open_mutex);
1da177e4
LT		 900 if (err < 0)
901 return err;
902 return 0;
903}
904
74ee4ff1 905static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
1da177e4 906{
74ee4ff1 907 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
1da177e4 908 int err;
62932df8 909 mutex_lock(&chip->open_mutex);
1da177e4 910 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
62932df8 911 mutex_unlock(&chip->open_mutex);
1da177e4
LT		 912 return err;
913}
914
74ee4ff1 915static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
1da177e4 916{
74ee4ff1 917 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
1da177e4
LT		 918 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
919}
920
74ee4ff1 921static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
1da177e4 922{
74ee4ff1 923 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
1da177e4
LT		 924 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
925}
926
927
928/* AC97 playback */
6769e988 929static const struct snd_pcm_ops snd_atiixp_playback_ops = {
1da177e4
LT		 930 .open = snd_atiixp_playback_open,
931 .close = snd_atiixp_playback_close,
1da177e4
LT		 932 .hw_params = snd_atiixp_pcm_hw_params,
933 .hw_free = snd_atiixp_pcm_hw_free,
934 .prepare = snd_atiixp_playback_prepare,
935 .trigger = snd_atiixp_pcm_trigger,
936 .pointer = snd_atiixp_pcm_pointer,
937};
938
939/* AC97 capture */
6769e988 940static const struct snd_pcm_ops snd_atiixp_capture_ops = {
1da177e4
LT		 941 .open = snd_atiixp_capture_open,
942 .close = snd_atiixp_capture_close,
1da177e4
LT		 943 .hw_params = snd_atiixp_pcm_hw_params,
944 .hw_free = snd_atiixp_pcm_hw_free,
945 .prepare = snd_atiixp_capture_prepare,
946 .trigger = snd_atiixp_pcm_trigger,
947 .pointer = snd_atiixp_pcm_pointer,
948};
949
064e186f 950static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
1da177e4
LT		 951 .type = ATI_DMA_PLAYBACK,
952 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
953 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
954 .enable_dma = atiixp_out_enable_dma,
955 .enable_transfer = atiixp_out_enable_transfer,
956 .flush_dma = atiixp_out_flush_dma,
957};
958
064e186f 959static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
1da177e4
LT		 960 .type = ATI_DMA_CAPTURE,
961 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
962 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
963 .enable_dma = atiixp_in_enable_dma,
964 .enable_transfer = atiixp_in_enable_transfer,
965 .flush_dma = atiixp_in_flush_dma,
966};
967
e23e7a14 968static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
1da177e4 969{
74ee4ff1 970 struct snd_pcm *pcm;
1da177e4
LT		 971 int err;
972
973 /* initialize constants */
974 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
975 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
976
977 /* PCM #0: analog I/O */
978 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
979 if (err < 0)
980 return err;
981 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
982 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
6632d198 983 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1da177e4
LT		 984 pcm->private_data = chip;
985 strcpy(pcm->name, "ATI IXP MC97");
986 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
987
801bf057
TI		 988 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
989 &chip->pci->dev, 64*1024, 128*1024);
1da177e4
LT		 990
991 return 0;
992}
993
994
995
996/*
997 * interrupt handler
998 */
7d12e780 999static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1da177e4 1000{
74ee4ff1 1001 struct atiixp_modem *chip = dev_id;
1da177e4
LT		 1002 unsigned int status;
1003
1004 status = atiixp_read(chip, ISR);
1005
1006 if (! status)
1007 return IRQ_NONE;
1008
1009 /* process audio DMA */
1010 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1011 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1012 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1013 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1014 if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1015 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1016 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1017 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1018
1019 /* for codec detection */
1020 if (status & CODEC_CHECK_BITS) {
1021 unsigned int detected;
1022 detected = status & CODEC_CHECK_BITS;
1023 spin_lock(&chip->reg_lock);
1024 chip->codec_not_ready_bits |= detected;
1025 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1026 spin_unlock(&chip->reg_lock);
1027 }
1028
1029 /* ack */
1030 atiixp_write(chip, ISR, status);
1031
1032 return IRQ_HANDLED;
1033}
1034
1035
1036/*
1037 * ac97 mixer section
1038 */
1039
e23e7a14 1040static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1da177e4 1041{
74ee4ff1
TI		 1042 struct snd_ac97_bus *pbus;
1043 struct snd_ac97_template ac97;
1da177e4
LT		 1044 int i, err;
1045 int codec_count;
51055da5 1046 static const struct snd_ac97_bus_ops ops = {
1da177e4
LT		 1047 .write = snd_atiixp_ac97_write,
1048 .read = snd_atiixp_ac97_read,
1049 };
066c044b 1050 static const unsigned int codec_skip[NUM_ATI_CODECS] = {
1da177e4
LT		 1051 ATI_REG_ISR_CODEC0_NOT_READY,
1052 ATI_REG_ISR_CODEC1_NOT_READY,
1053 ATI_REG_ISR_CODEC2_NOT_READY,
1054 };
1055
1056 if (snd_atiixp_codec_detect(chip) < 0)
1057 return -ENXIO;
1058
b83bea38
TI		 1059 err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus);
1060 if (err < 0)
1da177e4
LT		 1061 return err;
1062 pbus->clock = clock;
1da177e4
LT		 1063 chip->ac97_bus = pbus;
1064
1065 codec_count = 0;
1066 for (i = 0; i < NUM_ATI_CODECS; i++) {
1067 if (chip->codec_not_ready_bits & codec_skip[i])
1068 continue;
1069 memset(&ac97, 0, sizeof(ac97));
1070 ac97.private_data = chip;
1071 ac97.pci = chip->pci;
1072 ac97.num = i;
f1a63a38 1073 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
b83bea38
TI		 1074 err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i]);
1075 if (err < 0) {
1da177e4 1076 chip->ac97[i] = NULL; /* to be sure */
ca6aafd8
TI		 1077 dev_dbg(chip->card->dev,
1078 "codec %d not available for modem\n", i);
1da177e4
LT		 1079 continue;
1080 }
1081 codec_count++;
1082 }
1083
1084 if (! codec_count) {
ca6aafd8 1085 dev_err(chip->card->dev, "no codec available\n");
1da177e4
LT		 1086 return -ENODEV;
1087 }
1088
1089 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1090
1091 return 0;
1092}
1093
1094
1da177e4
LT		 1095/*
1096 * power management
1097 */
68cb2b55 1098static int snd_atiixp_suspend(struct device *dev)
1da177e4 1099{
68cb2b55 1100 struct snd_card *card = dev_get_drvdata(dev);
92304cc7 1101 struct atiixp_modem *chip = card->private_data;
1da177e4
LT		 1102 int i;
1103
92304cc7 1104 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1da177e4 1105 for (i = 0; i < NUM_ATI_CODECS; i++)
92304cc7 1106 snd_ac97_suspend(chip->ac97[i]);
1da177e4
LT		 1107 snd_atiixp_aclink_down(chip);
1108 snd_atiixp_chip_stop(chip);
1da177e4
LT		 1109 return 0;
1110}
1111
68cb2b55 1112static int snd_atiixp_resume(struct device *dev)
1da177e4 1113{
68cb2b55 1114 struct snd_card *card = dev_get_drvdata(dev);
92304cc7 1115 struct atiixp_modem *chip = card->private_data;
1da177e4
LT		 1116 int i;
1117
1da177e4
LT		 1118 snd_atiixp_aclink_reset(chip);
1119 snd_atiixp_chip_start(chip);
1120
1121 for (i = 0; i < NUM_ATI_CODECS; i++)
92304cc7 1122 snd_ac97_resume(chip->ac97[i]);
1da177e4 1123
92304cc7 1124 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1125 return 0;
1126}
1da177e4 1127
b462d0b9 1128static DEFINE_SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1da177e4
LT		 1129
1130/*
1131 * proc interface for register dump
1132 */
1133
74ee4ff1
TI		 1134static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1135 struct snd_info_buffer *buffer)
1da177e4 1136{
74ee4ff1 1137 struct atiixp_modem *chip = entry->private_data;
1da177e4
LT		 1138 int i;
1139
1140 for (i = 0; i < 256; i += 4)
1141 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1142}
1143
e23e7a14 1144static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1da177e4 1145{
47f2769b
TI		 1146 snd_card_ro_proc_new(chip->card, "atiixp-modem", chip,
1147 snd_atiixp_proc_read);
1da177e4 1148}
1da177e4
LT		 1149
1150
1151/*
1152 * destructor
1153 */
1154
86bde74d 1155static void snd_atiixp_free(struct snd_card *card)
1da177e4 1156{
86bde74d 1157 snd_atiixp_chip_stop(card->private_data);
1da177e4
LT		 1158}
1159
1160/*
1161 * constructor for chip instance
1162 */
86bde74d 1163static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci)
1da177e4 1164{
86bde74d 1165 struct atiixp_modem *chip = card->private_data;
1da177e4
LT		 1166 int err;
1167
86bde74d 1168 err = pcim_enable_device(pci);
b83bea38 1169 if (err < 0)
1da177e4
LT		 1170 return err;
1171
1da177e4 1172 spin_lock_init(&chip->reg_lock);
62932df8 1173 mutex_init(&chip->open_mutex);
1da177e4
LT		 1174 chip->card = card;
1175 chip->pci = pci;
1176 chip->irq = -1;
86bde74d
TI		 1177 err = pcim_iomap_regions(pci, 1 << 0, "ATI IXP MC97");
1178 if (err < 0)
1da177e4 1179 return err;
1da177e4 1180 chip->addr = pci_resource_start(pci, 0);
86bde74d 1181 chip->remap_addr = pcim_iomap_table(pci)[0];
1da177e4 1182
86bde74d
TI		 1183 if (devm_request_irq(&pci->dev, pci->irq, snd_atiixp_interrupt,
1184 IRQF_SHARED, KBUILD_MODNAME, chip)) {
ca6aafd8 1185 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1da177e4
LT		 1186 return -EBUSY;
1187 }
1188 chip->irq = pci->irq;
4504487d 1189 card->sync_irq = chip->irq;
86bde74d 1190 card->private_free = snd_atiixp_free;
1da177e4 1191 pci_set_master(pci);
1da177e4 1192
1da177e4
LT		 1193 return 0;
1194}
1195
1196
48e8adde
TI		 1197static int __snd_atiixp_probe(struct pci_dev *pci,
1198 const struct pci_device_id *pci_id)
1da177e4 1199{
74ee4ff1
TI		 1200 struct snd_card *card;
1201 struct atiixp_modem *chip;
1da177e4
LT		 1202 int err;
1203
86bde74d
TI		 1204 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
1205 sizeof(*chip), &card);
e58de7ba
TI		 1206 if (err < 0)
1207 return err;
86bde74d 1208 chip = card->private_data;
1da177e4 1209
1da177e4
LT		 1210 strcpy(card->driver, "ATIIXP-MODEM");
1211 strcpy(card->shortname, "ATI IXP Modem");
86bde74d 1212 err = snd_atiixp_init(card, pci);
b83bea38 1213 if (err < 0)
86bde74d 1214 return err;
1da177e4 1215
b83bea38
TI		 1216 err = snd_atiixp_aclink_reset(chip);
1217 if (err < 0)
86bde74d 1218 return err;
1da177e4 1219
b83bea38
TI		 1220 err = snd_atiixp_mixer_new(chip, ac97_clock);
1221 if (err < 0)
86bde74d 1222 return err;
1da177e4 1223
b83bea38
TI		 1224 err = snd_atiixp_pcm_new(chip);
1225 if (err < 0)
86bde74d 1226 return err;
1da177e4
LT		 1227
1228 snd_atiixp_proc_init(chip);
1229
1230 snd_atiixp_chip_start(chip);
1231
1232 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
44c10138 1233 card->shortname, pci->revision, chip->addr, chip->irq);
1da177e4 1234
b83bea38
TI		 1235 err = snd_card_register(card);
1236 if (err < 0)
86bde74d 1237 return err;
1da177e4
LT		 1238
1239 pci_set_drvdata(pci, card);
1da177e4 1240 return 0;
1da177e4
LT		 1241}
1242
48e8adde
TI		 1243static int snd_atiixp_probe(struct pci_dev *pci,
1244 const struct pci_device_id *pci_id)
1245{
1246 return snd_card_free_on_error(&pci->dev, __snd_atiixp_probe(pci, pci_id));
1247}
1248
e9f66d9b 1249static struct pci_driver atiixp_modem_driver = {
3733e424 1250 .name = KBUILD_MODNAME,
1da177e4
LT		 1251 .id_table = snd_atiixp_ids,
1252 .probe = snd_atiixp_probe,
68cb2b55 1253 .driver = {
b462d0b9 1254 .pm = &snd_atiixp_pm,
68cb2b55 1255 },
1da177e4
LT		 1256};
1257
e9f66d9b 1258module_pci_driver(atiixp_modem_driver);
Linux 6.x block layer and io_uring tree(s)