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 snd_atiixp_aclink_down(struct atiixp_modem * chip)499 static int snd_atiixp_aclink_down(struct atiixp_modem *chip) 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 } 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 snd_atiixp_codec_detect(struct atiixp_modem * chip)523 static int snd_atiixp_codec_detect(struct atiixp_modem *chip) 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 */ 530 timeout = 50; 531 while (timeout-- > 0) { 532 msleep(1); 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) { 539 dev_err(chip->card->dev, "no codec detected!\n"); 540 return -ENXIO; 541 } 542 return 0; 543 } 544 545 546 /* 547 * enable DMA and irqs 548 */ snd_atiixp_chip_start(struct atiixp_modem * chip)549 static int snd_atiixp_chip_start(struct atiixp_modem *chip) 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 */ snd_atiixp_chip_stop(struct atiixp_modem * chip)574 static int snd_atiixp_chip_stop(struct atiixp_modem *chip) 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 */ snd_atiixp_pcm_pointer(struct snd_pcm_substream * substream)593 static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream) 594 { 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; 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 } 610 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n", 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 */ snd_atiixp_xrun_dma(struct atiixp_modem * chip,struct atiixp_dma * dma)618 static void snd_atiixp_xrun_dma(struct atiixp_modem *chip, 619 struct atiixp_dma *dma) 620 { 621 if (! dma->substream || ! dma->running) 622 return; 623 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type); 624 snd_pcm_stop_xrun(dma->substream); 625 } 626 627 /* 628 * the period ack. update the substream. 629 */ snd_atiixp_update_dma(struct atiixp_modem * chip,struct atiixp_dma * dma)630 static void snd_atiixp_update_dma(struct atiixp_modem *chip, 631 struct atiixp_dma *dma) 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 */ snd_atiixp_check_bus_busy(struct atiixp_modem * chip)640 static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip) 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 */ snd_atiixp_pcm_trigger(struct snd_pcm_substream * substream,int cmd)654 static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 655 { 656 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 657 struct atiixp_dma *dma = substream->runtime->private_data; 658 int err = 0; 659 660 if (snd_BUG_ON(!dma->ops->enable_transfer || 661 !dma->ops->flush_dma)) 662 return -EINVAL; 663 664 spin_lock(&chip->reg_lock); 665 switch(cmd) { 666 case SNDRV_PCM_TRIGGER_START: 667 dma->ops->enable_transfer(chip, 1); 668 dma->running = 1; 669 break; 670 case SNDRV_PCM_TRIGGER_STOP: 671 dma->ops->enable_transfer(chip, 0); 672 dma->running = 0; 673 break; 674 default: 675 err = -EINVAL; 676 break; 677 } 678 if (! err) { 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 } 684 } 685 spin_unlock(&chip->reg_lock); 686 return err; 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 */ atiixp_out_flush_dma(struct atiixp_modem * chip)697 static void atiixp_out_flush_dma(struct atiixp_modem *chip) 698 { 699 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH); 700 } 701 702 /* enable/disable analog OUT DMA */ atiixp_out_enable_dma(struct atiixp_modem * chip,int on)703 static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on) 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 */ atiixp_out_enable_transfer(struct atiixp_modem * chip,int on)718 static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on) 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 */ atiixp_in_enable_dma(struct atiixp_modem * chip,int on)725 static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on) 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 */ atiixp_in_enable_transfer(struct atiixp_modem * chip,int on)732 static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on) 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 */ atiixp_in_flush_dma(struct atiixp_modem * chip)745 static void atiixp_in_flush_dma(struct atiixp_modem *chip) 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 */ snd_atiixp_playback_prepare(struct snd_pcm_substream * substream)751 static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream) 752 { 753 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 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 */ snd_atiixp_capture_prepare(struct snd_pcm_substream * substream)767 static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream) 768 { 769 return 0; 770 } 771 772 /* 773 * hw_params - allocate the buffer and set up buffer descriptors 774 */ snd_atiixp_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)775 static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream, 776 struct snd_pcm_hw_params *hw_params) 777 { 778 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 779 struct atiixp_dma *dma = substream->runtime->private_data; 780 int err; 781 int i; 782 783 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 snd_atiixp_pcm_hw_free(struct snd_pcm_substream * substream)803 static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream) 804 { 805 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 806 struct atiixp_dma *dma = substream->runtime->private_data; 807 808 atiixp_clear_dma_packets(chip, dma, substream); 809 return 0; 810 } 811 812 813 /* 814 * pcm hardware definition, identical for all DMA types 815 */ 816 static const struct snd_pcm_hardware snd_atiixp_pcm_hw = 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, 822 .rates = (SNDRV_PCM_RATE_8000 | 823 SNDRV_PCM_RATE_16000 | 824 SNDRV_PCM_RATE_KNOT), 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 snd_atiixp_pcm_open(struct snd_pcm_substream * substream,struct atiixp_dma * dma,int pcm_type)836 static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream, 837 struct atiixp_dma *dma, int pcm_type) 838 { 839 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 840 struct snd_pcm_runtime *runtime = substream->runtime; 841 int err; 842 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 }; 843 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = { 844 .count = ARRAY_SIZE(rates), 845 .list = rates, 846 .mask = 0, 847 }; 848 849 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma)) 850 return -EINVAL; 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; 857 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 858 &hw_constraints_rates); 859 if (err < 0) 860 return err; 861 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); 862 if (err < 0) 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 snd_atiixp_pcm_close(struct snd_pcm_substream * substream,struct atiixp_dma * dma)875 static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream, 876 struct atiixp_dma *dma) 877 { 878 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 879 /* disable DMA bits */ 880 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma)) 881 return -EINVAL; 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 */ snd_atiixp_playback_open(struct snd_pcm_substream * substream)892 static int snd_atiixp_playback_open(struct snd_pcm_substream *substream) 893 { 894 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 895 int err; 896 897 mutex_lock(&chip->open_mutex); 898 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0); 899 mutex_unlock(&chip->open_mutex); 900 if (err < 0) 901 return err; 902 return 0; 903 } 904 snd_atiixp_playback_close(struct snd_pcm_substream * substream)905 static int snd_atiixp_playback_close(struct snd_pcm_substream *substream) 906 { 907 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 908 int err; 909 mutex_lock(&chip->open_mutex); 910 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]); 911 mutex_unlock(&chip->open_mutex); 912 return err; 913 } 914 snd_atiixp_capture_open(struct snd_pcm_substream * substream)915 static int snd_atiixp_capture_open(struct snd_pcm_substream *substream) 916 { 917 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 918 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1); 919 } 920 snd_atiixp_capture_close(struct snd_pcm_substream * substream)921 static int snd_atiixp_capture_close(struct snd_pcm_substream *substream) 922 { 923 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 924 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]); 925 } 926 927 928 /* AC97 playback */ 929 static const struct snd_pcm_ops snd_atiixp_playback_ops = { 930 .open = snd_atiixp_playback_open, 931 .close = snd_atiixp_playback_close, 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 */ 940 static const struct snd_pcm_ops snd_atiixp_capture_ops = { 941 .open = snd_atiixp_capture_open, 942 .close = snd_atiixp_capture_close, 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 }; 949 950 static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = { 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 }; 958 959 static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = { 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 snd_atiixp_pcm_new(struct atiixp_modem * chip)968 static int snd_atiixp_pcm_new(struct atiixp_modem *chip) 969 { 970 struct snd_pcm *pcm; 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); 983 pcm->dev_class = SNDRV_PCM_CLASS_MODEM; 984 pcm->private_data = chip; 985 strscpy(pcm->name, "ATI IXP MC97"); 986 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm; 987 988 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, 989 &chip->pci->dev, 64*1024, 128*1024); 990 991 return 0; 992 } 993 994 995 996 /* 997 * interrupt handler 998 */ snd_atiixp_interrupt(int irq,void * dev_id)999 static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id) 1000 { 1001 struct atiixp_modem *chip = dev_id; 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 snd_atiixp_mixer_new(struct atiixp_modem * chip,int clock)1040 static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock) 1041 { 1042 struct snd_ac97_bus *pbus; 1043 struct snd_ac97_template ac97; 1044 int i, err; 1045 int codec_count; 1046 static const struct snd_ac97_bus_ops ops = { 1047 .write = snd_atiixp_ac97_write, 1048 .read = snd_atiixp_ac97_read, 1049 }; 1050 static const unsigned int codec_skip[NUM_ATI_CODECS] = { 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 1059 err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus); 1060 if (err < 0) 1061 return err; 1062 pbus->clock = clock; 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; 1073 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; 1074 err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i]); 1075 if (err < 0) { 1076 chip->ac97[i] = NULL; /* to be sure */ 1077 dev_dbg(chip->card->dev, 1078 "codec %d not available for modem\n", i); 1079 continue; 1080 } 1081 codec_count++; 1082 } 1083 1084 if (! codec_count) { 1085 dev_err(chip->card->dev, "no codec available\n"); 1086 return -ENODEV; 1087 } 1088 1089 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */ 1090 1091 return 0; 1092 } 1093 1094 1095 /* 1096 * power management 1097 */ snd_atiixp_suspend(struct device * dev)1098 static int snd_atiixp_suspend(struct device *dev) 1099 { 1100 struct snd_card *card = dev_get_drvdata(dev); 1101 struct atiixp_modem *chip = card->private_data; 1102 int i; 1103 1104 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); 1105 for (i = 0; i < NUM_ATI_CODECS; i++) 1106 snd_ac97_suspend(chip->ac97[i]); 1107 snd_atiixp_aclink_down(chip); 1108 snd_atiixp_chip_stop(chip); 1109 return 0; 1110 } 1111 snd_atiixp_resume(struct device * dev)1112 static int snd_atiixp_resume(struct device *dev) 1113 { 1114 struct snd_card *card = dev_get_drvdata(dev); 1115 struct atiixp_modem *chip = card->private_data; 1116 int i; 1117 1118 snd_atiixp_aclink_reset(chip); 1119 snd_atiixp_chip_start(chip); 1120 1121 for (i = 0; i < NUM_ATI_CODECS; i++) 1122 snd_ac97_resume(chip->ac97[i]); 1123 1124 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 1125 return 0; 1126 } 1127 1128 static DEFINE_SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume); 1129 1130 /* 1131 * proc interface for register dump 1132 */ 1133 snd_atiixp_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)1134 static void snd_atiixp_proc_read(struct snd_info_entry *entry, 1135 struct snd_info_buffer *buffer) 1136 { 1137 struct atiixp_modem *chip = entry->private_data; 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 snd_atiixp_proc_init(struct atiixp_modem * chip)1144 static void snd_atiixp_proc_init(struct atiixp_modem *chip) 1145 { 1146 snd_card_ro_proc_new(chip->card, "atiixp-modem", chip, 1147 snd_atiixp_proc_read); 1148 } 1149 1150 1151 /* 1152 * destructor 1153 */ 1154 snd_atiixp_free(struct snd_card * card)1155 static void snd_atiixp_free(struct snd_card *card) 1156 { 1157 snd_atiixp_chip_stop(card->private_data); 1158 } 1159 1160 /* 1161 * constructor for chip instance 1162 */ snd_atiixp_init(struct snd_card * card,struct pci_dev * pci)1163 static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci) 1164 { 1165 struct atiixp_modem *chip = card->private_data; 1166 int err; 1167 1168 err = pcim_enable_device(pci); 1169 if (err < 0) 1170 return err; 1171 1172 spin_lock_init(&chip->reg_lock); 1173 mutex_init(&chip->open_mutex); 1174 chip->card = card; 1175 chip->pci = pci; 1176 chip->irq = -1; 1177 chip->remap_addr = pcim_iomap_region(pci, 0, "ATI IXP MC97"); 1178 if (IS_ERR(chip->remap_addr)) 1179 return PTR_ERR(chip->remap_addr); 1180 chip->addr = pci_resource_start(pci, 0); 1181 1182 if (devm_request_irq(&pci->dev, pci->irq, snd_atiixp_interrupt, 1183 IRQF_SHARED, KBUILD_MODNAME, chip)) { 1184 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); 1185 return -EBUSY; 1186 } 1187 chip->irq = pci->irq; 1188 card->sync_irq = chip->irq; 1189 card->private_free = snd_atiixp_free; 1190 pci_set_master(pci); 1191 1192 return 0; 1193 } 1194 1195 __snd_atiixp_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)1196 static int __snd_atiixp_probe(struct pci_dev *pci, 1197 const struct pci_device_id *pci_id) 1198 { 1199 struct snd_card *card; 1200 struct atiixp_modem *chip; 1201 int err; 1202 1203 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE, 1204 sizeof(*chip), &card); 1205 if (err < 0) 1206 return err; 1207 chip = card->private_data; 1208 1209 strscpy(card->driver, "ATIIXP-MODEM"); 1210 strscpy(card->shortname, "ATI IXP Modem"); 1211 err = snd_atiixp_init(card, pci); 1212 if (err < 0) 1213 return err; 1214 1215 err = snd_atiixp_aclink_reset(chip); 1216 if (err < 0) 1217 return err; 1218 1219 err = snd_atiixp_mixer_new(chip, ac97_clock); 1220 if (err < 0) 1221 return err; 1222 1223 err = snd_atiixp_pcm_new(chip); 1224 if (err < 0) 1225 return err; 1226 1227 snd_atiixp_proc_init(chip); 1228 1229 snd_atiixp_chip_start(chip); 1230 1231 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i", 1232 card->shortname, pci->revision, chip->addr, chip->irq); 1233 1234 err = snd_card_register(card); 1235 if (err < 0) 1236 return err; 1237 1238 pci_set_drvdata(pci, card); 1239 return 0; 1240 } 1241 snd_atiixp_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)1242 static int snd_atiixp_probe(struct pci_dev *pci, 1243 const struct pci_device_id *pci_id) 1244 { 1245 return snd_card_free_on_error(&pci->dev, __snd_atiixp_probe(pci, pci_id)); 1246 } 1247 1248 static struct pci_driver atiixp_modem_driver = { 1249 .name = KBUILD_MODNAME, 1250 .id_table = snd_atiixp_ids, 1251 .probe = snd_atiixp_probe, 1252 .driver = { 1253 .pm = &snd_atiixp_pm, 1254 }, 1255 }; 1256 1257 module_pci_driver(atiixp_modem_driver); 1258