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 MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}"); 27 28 static int index = -2; /* Exclude the first card */ 29 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ 30 static int ac97_clock = 48000; 31 32 module_param(index, int, 0444); 33 MODULE_PARM_DESC(index, "Index value for ATI IXP controller."); 34 module_param(id, charp, 0444); 35 MODULE_PARM_DESC(id, "ID string for ATI IXP controller."); 36 module_param(ac97_clock, int, 0444); 37 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz)."); 38 39 /* just for backward compatibility */ 40 static bool enable; 41 module_param(enable, bool, 0444); 42 43 44 /* 45 */ 46 47 #define ATI_REG_ISR 0x00 /* interrupt source */ 48 #define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0) 49 #define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1) 50 #define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2) 51 #define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3) 52 #define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4) 53 #define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5) 54 #define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6) 55 #define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7) 56 #define ATI_REG_ISR_PHYS_INTR (1U<<8) 57 #define ATI_REG_ISR_PHYS_MISMATCH (1U<<9) 58 #define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10) 59 #define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11) 60 #define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12) 61 #define ATI_REG_ISR_NEW_FRAME (1U<<13) 62 #define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14) 63 64 #define ATI_REG_IER 0x04 /* interrupt enable */ 65 #define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0) 66 #define ATI_REG_IER_MODEM_STATUS_EN (1U<<1) 67 #define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2) 68 #define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4) 69 #define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6) 70 #define ATI_REG_IER_PHYS_INTR_EN (1U<<8) 71 #define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9) 72 #define ATI_REG_IER_CODEC0_INTR_EN (1U<<10) 73 #define ATI_REG_IER_CODEC1_INTR_EN (1U<<11) 74 #define ATI_REG_IER_CODEC2_INTR_EN (1U<<12) 75 #define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */ 76 #define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */ 77 #define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15) 78 79 #define ATI_REG_CMD 0x08 /* command */ 80 #define ATI_REG_CMD_POWERDOWN (1U<<0) 81 #define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */ 82 #define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */ 83 #define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */ 84 #define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */ 85 #define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */ 86 #define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */ 87 #define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */ 88 #define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */ 89 #define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */ 90 #define ATI_REG_CMD_AUDIO_PRESENT (1U<<20) 91 #define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */ 92 #define ATI_REG_CMD_LOOPBACK_EN (1U<<23) 93 #define ATI_REG_CMD_PACKED_DIS (1U<<24) 94 #define ATI_REG_CMD_BURST_EN (1U<<25) 95 #define ATI_REG_CMD_PANIC_EN (1U<<26) 96 #define ATI_REG_CMD_MODEM_PRESENT (1U<<27) 97 #define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28) 98 #define ATI_REG_CMD_AC_SOFT_RESET (1U<<29) 99 #define ATI_REG_CMD_AC_SYNC (1U<<30) 100 #define ATI_REG_CMD_AC_RESET (1U<<31) 101 102 #define ATI_REG_PHYS_OUT_ADDR 0x0c 103 #define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0) 104 #define ATI_REG_PHYS_OUT_RW (1U<<2) 105 #define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8) 106 #define ATI_REG_PHYS_OUT_ADDR_SHIFT 9 107 #define ATI_REG_PHYS_OUT_DATA_SHIFT 16 108 109 #define ATI_REG_PHYS_IN_ADDR 0x10 110 #define ATI_REG_PHYS_IN_READ_FLAG (1U<<8) 111 #define ATI_REG_PHYS_IN_ADDR_SHIFT 9 112 #define ATI_REG_PHYS_IN_DATA_SHIFT 16 113 114 #define ATI_REG_SLOTREQ 0x14 115 116 #define ATI_REG_COUNTER 0x18 117 #define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */ 118 #define ATI_REG_COUNTER_BITCLOCK (31U<<8) 119 120 #define ATI_REG_IN_FIFO_THRESHOLD 0x1c 121 122 #define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20 123 #define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */ 124 #define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */ 125 #define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */ 126 #define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30 127 #define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */ 128 #define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16) 129 #define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16 130 #define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38 131 #define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c 132 #define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40 133 #define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44 134 #define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48 135 #define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c 136 #define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50 137 #define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54 138 #define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58 139 #define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c 140 #define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60 141 #define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64 142 #define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68 143 #define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c 144 #define ATI_REG_MODEM_OUT_FIFO_USED 0x70 145 #define ATI_REG_MODEM_OUT_GPIO 0x74 146 #define ATI_REG_MODEM_OUT_GPIO_EN 1 147 #define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5 148 #define ATI_REG_MODEM_IN_GPIO 0x78 149 150 #define ATI_REG_MODEM_MIRROR 0x7c 151 #define ATI_REG_AUDIO_MIRROR 0x80 152 153 #define ATI_REG_MODEM_FIFO_FLUSH 0x88 154 #define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0) 155 #define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1) 156 #define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2) 157 #define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3) 158 159 /* LINKPTR */ 160 #define ATI_REG_LINKPTR_EN (1U<<0) 161 162 #define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */ 163 164 165 struct atiixp_modem; 166 167 /* 168 * DMA packate descriptor 169 */ 170 171 struct atiixp_dma_desc { 172 __le32 addr; /* DMA buffer address */ 173 u16 status; /* status bits */ 174 u16 size; /* size of the packet in dwords */ 175 __le32 next; /* address of the next packet descriptor */ 176 }; 177 178 /* 179 * stream enum 180 */ 181 enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */ 182 enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */ 183 enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */ 184 185 #define NUM_ATI_CODECS 3 186 187 188 /* 189 * constants and callbacks for each DMA type 190 */ 191 struct atiixp_dma_ops { 192 int type; /* ATI_DMA_XXX */ 193 unsigned int llp_offset; /* LINKPTR offset */ 194 unsigned int dt_cur; /* DT_CUR offset */ 195 /* called from open callback */ 196 void (*enable_dma)(struct atiixp_modem *chip, int on); 197 /* called from trigger (START/STOP) */ 198 void (*enable_transfer)(struct atiixp_modem *chip, int on); 199 /* called from trigger (STOP only) */ 200 void (*flush_dma)(struct atiixp_modem *chip); 201 }; 202 203 /* 204 * DMA stream 205 */ 206 struct atiixp_dma { 207 const struct atiixp_dma_ops *ops; 208 struct snd_dma_buffer desc_buf; 209 struct snd_pcm_substream *substream; /* assigned PCM substream */ 210 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */ 211 unsigned int period_bytes, periods; 212 int opened; 213 int running; 214 int pcm_open_flag; 215 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */ 216 }; 217 218 /* 219 * ATI IXP chip 220 */ 221 struct atiixp_modem { 222 struct snd_card *card; 223 struct pci_dev *pci; 224 225 struct resource *res; /* memory i/o */ 226 unsigned long addr; 227 void __iomem *remap_addr; 228 int irq; 229 230 struct snd_ac97_bus *ac97_bus; 231 struct snd_ac97 *ac97[NUM_ATI_CODECS]; 232 233 spinlock_t reg_lock; 234 235 struct atiixp_dma dmas[NUM_ATI_DMAS]; 236 struct ac97_pcm *pcms[NUM_ATI_PCMS]; 237 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS]; 238 239 int max_channels; /* max. channels for PCM out */ 240 241 unsigned int codec_not_ready_bits; /* for codec detection */ 242 243 int spdif_over_aclink; /* passed from the module option */ 244 struct mutex open_mutex; /* playback open mutex */ 245 }; 246 247 248 /* 249 */ 250 static const struct pci_device_id snd_atiixp_ids[] = { 251 { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */ 252 { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */ 253 { 0, } 254 }; 255 256 MODULE_DEVICE_TABLE(pci, snd_atiixp_ids); 257 258 259 /* 260 * lowlevel functions 261 */ 262 263 /* 264 * update the bits of the given register. 265 * return 1 if the bits changed. 266 */ 267 static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg, 268 unsigned int mask, unsigned int value) 269 { 270 void __iomem *addr = chip->remap_addr + reg; 271 unsigned int data, old_data; 272 old_data = data = readl(addr); 273 data &= ~mask; 274 data |= value; 275 if (old_data == data) 276 return 0; 277 writel(data, addr); 278 return 1; 279 } 280 281 /* 282 * macros for easy use 283 */ 284 #define atiixp_write(chip,reg,value) \ 285 writel(value, chip->remap_addr + ATI_REG_##reg) 286 #define atiixp_read(chip,reg) \ 287 readl(chip->remap_addr + ATI_REG_##reg) 288 #define atiixp_update(chip,reg,mask,val) \ 289 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val) 290 291 /* 292 * handling DMA packets 293 * 294 * we allocate a linear buffer for the DMA, and split it to each packet. 295 * in a future version, a scatter-gather buffer should be implemented. 296 */ 297 298 #define ATI_DESC_LIST_SIZE \ 299 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc)) 300 301 /* 302 * build packets ring for the given buffer size. 303 * 304 * IXP handles the buffer descriptors, which are connected as a linked 305 * list. although we can change the list dynamically, in this version, 306 * a static RING of buffer descriptors is used. 307 * 308 * the ring is built in this function, and is set up to the hardware. 309 */ 310 static int atiixp_build_dma_packets(struct atiixp_modem *chip, 311 struct atiixp_dma *dma, 312 struct snd_pcm_substream *substream, 313 unsigned int periods, 314 unsigned int period_bytes) 315 { 316 unsigned int i; 317 u32 addr, desc_addr; 318 unsigned long flags; 319 320 if (periods > ATI_MAX_DESCRIPTORS) 321 return -ENOMEM; 322 323 if (dma->desc_buf.area == NULL) { 324 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci), 325 ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0) 326 return -ENOMEM; 327 dma->period_bytes = dma->periods = 0; /* clear */ 328 } 329 330 if (dma->periods == periods && dma->period_bytes == period_bytes) 331 return 0; 332 333 /* reset DMA before changing the descriptor table */ 334 spin_lock_irqsave(&chip->reg_lock, flags); 335 writel(0, chip->remap_addr + dma->ops->llp_offset); 336 dma->ops->enable_dma(chip, 0); 337 dma->ops->enable_dma(chip, 1); 338 spin_unlock_irqrestore(&chip->reg_lock, flags); 339 340 /* fill the entries */ 341 addr = (u32)substream->runtime->dma_addr; 342 desc_addr = (u32)dma->desc_buf.addr; 343 for (i = 0; i < periods; i++) { 344 struct atiixp_dma_desc *desc; 345 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i]; 346 desc->addr = cpu_to_le32(addr); 347 desc->status = 0; 348 desc->size = period_bytes >> 2; /* in dwords */ 349 desc_addr += sizeof(struct atiixp_dma_desc); 350 if (i == periods - 1) 351 desc->next = cpu_to_le32((u32)dma->desc_buf.addr); 352 else 353 desc->next = cpu_to_le32(desc_addr); 354 addr += period_bytes; 355 } 356 357 writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN, 358 chip->remap_addr + dma->ops->llp_offset); 359 360 dma->period_bytes = period_bytes; 361 dma->periods = periods; 362 363 return 0; 364 } 365 366 /* 367 * remove the ring buffer and release it if assigned 368 */ 369 static void atiixp_clear_dma_packets(struct atiixp_modem *chip, 370 struct atiixp_dma *dma, 371 struct snd_pcm_substream *substream) 372 { 373 if (dma->desc_buf.area) { 374 writel(0, chip->remap_addr + dma->ops->llp_offset); 375 snd_dma_free_pages(&dma->desc_buf); 376 dma->desc_buf.area = NULL; 377 } 378 } 379 380 /* 381 * AC97 interface 382 */ 383 static int snd_atiixp_acquire_codec(struct atiixp_modem *chip) 384 { 385 int timeout = 1000; 386 387 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) { 388 if (! timeout--) { 389 dev_warn(chip->card->dev, "codec acquire timeout\n"); 390 return -EBUSY; 391 } 392 udelay(1); 393 } 394 return 0; 395 } 396 397 static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip, 398 unsigned short codec, 399 unsigned short reg) 400 { 401 unsigned int data; 402 int timeout; 403 404 if (snd_atiixp_acquire_codec(chip) < 0) 405 return 0xffff; 406 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) | 407 ATI_REG_PHYS_OUT_ADDR_EN | 408 ATI_REG_PHYS_OUT_RW | 409 codec; 410 atiixp_write(chip, PHYS_OUT_ADDR, data); 411 if (snd_atiixp_acquire_codec(chip) < 0) 412 return 0xffff; 413 timeout = 1000; 414 do { 415 data = atiixp_read(chip, PHYS_IN_ADDR); 416 if (data & ATI_REG_PHYS_IN_READ_FLAG) 417 return data >> ATI_REG_PHYS_IN_DATA_SHIFT; 418 udelay(1); 419 } while (--timeout); 420 /* time out may happen during reset */ 421 if (reg < 0x7c) 422 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg); 423 return 0xffff; 424 } 425 426 427 static void snd_atiixp_codec_write(struct atiixp_modem *chip, 428 unsigned short codec, 429 unsigned short reg, unsigned short val) 430 { 431 unsigned int data; 432 433 if (snd_atiixp_acquire_codec(chip) < 0) 434 return; 435 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) | 436 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) | 437 ATI_REG_PHYS_OUT_ADDR_EN | codec; 438 atiixp_write(chip, PHYS_OUT_ADDR, data); 439 } 440 441 442 static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97, 443 unsigned short reg) 444 { 445 struct atiixp_modem *chip = ac97->private_data; 446 return snd_atiixp_codec_read(chip, ac97->num, reg); 447 448 } 449 450 static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg, 451 unsigned short val) 452 { 453 struct atiixp_modem *chip = ac97->private_data; 454 if (reg == AC97_GPIO_STATUS) { 455 atiixp_write(chip, MODEM_OUT_GPIO, 456 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN); 457 return; 458 } 459 snd_atiixp_codec_write(chip, ac97->num, reg, val); 460 } 461 462 /* 463 * reset AC link 464 */ 465 static int snd_atiixp_aclink_reset(struct atiixp_modem *chip) 466 { 467 int timeout; 468 469 /* reset powerdoewn */ 470 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0)) 471 udelay(10); 472 473 /* perform a software reset */ 474 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET); 475 atiixp_read(chip, CMD); 476 udelay(10); 477 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0); 478 479 timeout = 10; 480 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) { 481 /* do a hard reset */ 482 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET, 483 ATI_REG_CMD_AC_SYNC); 484 atiixp_read(chip, CMD); 485 msleep(1); 486 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET); 487 if (!--timeout) { 488 dev_err(chip->card->dev, "codec reset timeout\n"); 489 break; 490 } 491 } 492 493 /* deassert RESET and assert SYNC to make sure */ 494 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET, 495 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET); 496 497 return 0; 498 } 499 500 #ifdef CONFIG_PM_SLEEP 501 static int snd_atiixp_aclink_down(struct atiixp_modem *chip) 502 { 503 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */ 504 // return -EBUSY; 505 atiixp_update(chip, CMD, 506 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET, 507 ATI_REG_CMD_POWERDOWN); 508 return 0; 509 } 510 #endif 511 512 /* 513 * auto-detection of codecs 514 * 515 * the IXP chip can generate interrupts for the non-existing codecs. 516 * NEW_FRAME interrupt is used to make sure that the interrupt is generated 517 * even if all three codecs are connected. 518 */ 519 520 #define ALL_CODEC_NOT_READY \ 521 (ATI_REG_ISR_CODEC0_NOT_READY |\ 522 ATI_REG_ISR_CODEC1_NOT_READY |\ 523 ATI_REG_ISR_CODEC2_NOT_READY) 524 #define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME) 525 526 static int snd_atiixp_codec_detect(struct atiixp_modem *chip) 527 { 528 int timeout; 529 530 chip->codec_not_ready_bits = 0; 531 atiixp_write(chip, IER, CODEC_CHECK_BITS); 532 /* wait for the interrupts */ 533 timeout = 50; 534 while (timeout-- > 0) { 535 msleep(1); 536 if (chip->codec_not_ready_bits) 537 break; 538 } 539 atiixp_write(chip, IER, 0); /* disable irqs */ 540 541 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) { 542 dev_err(chip->card->dev, "no codec detected!\n"); 543 return -ENXIO; 544 } 545 return 0; 546 } 547 548 549 /* 550 * enable DMA and irqs 551 */ 552 static int snd_atiixp_chip_start(struct atiixp_modem *chip) 553 { 554 unsigned int reg; 555 556 /* set up spdif, enable burst mode */ 557 reg = atiixp_read(chip, CMD); 558 reg |= ATI_REG_CMD_BURST_EN; 559 if(!(reg & ATI_REG_CMD_MODEM_PRESENT)) 560 reg |= ATI_REG_CMD_MODEM_PRESENT; 561 atiixp_write(chip, CMD, reg); 562 563 /* clear all interrupt source */ 564 atiixp_write(chip, ISR, 0xffffffff); 565 /* enable irqs */ 566 atiixp_write(chip, IER, 567 ATI_REG_IER_MODEM_STATUS_EN | 568 ATI_REG_IER_MODEM_IN_XRUN_EN | 569 ATI_REG_IER_MODEM_OUT1_XRUN_EN); 570 return 0; 571 } 572 573 574 /* 575 * disable DMA and IRQs 576 */ 577 static int snd_atiixp_chip_stop(struct atiixp_modem *chip) 578 { 579 /* clear interrupt source */ 580 atiixp_write(chip, ISR, atiixp_read(chip, ISR)); 581 /* disable irqs */ 582 atiixp_write(chip, IER, 0); 583 return 0; 584 } 585 586 587 /* 588 * PCM section 589 */ 590 591 /* 592 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current 593 * position. when SG-buffer is implemented, the offset must be calculated 594 * correctly... 595 */ 596 static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream) 597 { 598 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 599 struct snd_pcm_runtime *runtime = substream->runtime; 600 struct atiixp_dma *dma = runtime->private_data; 601 unsigned int curptr; 602 int timeout = 1000; 603 604 while (timeout--) { 605 curptr = readl(chip->remap_addr + dma->ops->dt_cur); 606 if (curptr < dma->buf_addr) 607 continue; 608 curptr -= dma->buf_addr; 609 if (curptr >= dma->buf_bytes) 610 continue; 611 return bytes_to_frames(runtime, curptr); 612 } 613 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n", 614 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr); 615 return 0; 616 } 617 618 /* 619 * XRUN detected, and stop the PCM substream 620 */ 621 static void snd_atiixp_xrun_dma(struct atiixp_modem *chip, 622 struct atiixp_dma *dma) 623 { 624 if (! dma->substream || ! dma->running) 625 return; 626 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type); 627 snd_pcm_stop_xrun(dma->substream); 628 } 629 630 /* 631 * the period ack. update the substream. 632 */ 633 static void snd_atiixp_update_dma(struct atiixp_modem *chip, 634 struct atiixp_dma *dma) 635 { 636 if (! dma->substream || ! dma->running) 637 return; 638 snd_pcm_period_elapsed(dma->substream); 639 } 640 641 /* set BUS_BUSY interrupt bit if any DMA is running */ 642 /* call with spinlock held */ 643 static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip) 644 { 645 unsigned int bus_busy; 646 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN | 647 ATI_REG_CMD_MODEM_RECEIVE_EN)) 648 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY; 649 else 650 bus_busy = 0; 651 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy); 652 } 653 654 /* common trigger callback 655 * calling the lowlevel callbacks in it 656 */ 657 static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 658 { 659 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 660 struct atiixp_dma *dma = substream->runtime->private_data; 661 int err = 0; 662 663 if (snd_BUG_ON(!dma->ops->enable_transfer || 664 !dma->ops->flush_dma)) 665 return -EINVAL; 666 667 spin_lock(&chip->reg_lock); 668 switch(cmd) { 669 case SNDRV_PCM_TRIGGER_START: 670 dma->ops->enable_transfer(chip, 1); 671 dma->running = 1; 672 break; 673 case SNDRV_PCM_TRIGGER_STOP: 674 dma->ops->enable_transfer(chip, 0); 675 dma->running = 0; 676 break; 677 default: 678 err = -EINVAL; 679 break; 680 } 681 if (! err) { 682 snd_atiixp_check_bus_busy(chip); 683 if (cmd == SNDRV_PCM_TRIGGER_STOP) { 684 dma->ops->flush_dma(chip); 685 snd_atiixp_check_bus_busy(chip); 686 } 687 } 688 spin_unlock(&chip->reg_lock); 689 return err; 690 } 691 692 693 /* 694 * lowlevel callbacks for each DMA type 695 * 696 * every callback is supposed to be called in chip->reg_lock spinlock 697 */ 698 699 /* flush FIFO of analog OUT DMA */ 700 static void atiixp_out_flush_dma(struct atiixp_modem *chip) 701 { 702 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH); 703 } 704 705 /* enable/disable analog OUT DMA */ 706 static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on) 707 { 708 unsigned int data; 709 data = atiixp_read(chip, CMD); 710 if (on) { 711 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN) 712 return; 713 atiixp_out_flush_dma(chip); 714 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN; 715 } else 716 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN; 717 atiixp_write(chip, CMD, data); 718 } 719 720 /* start/stop transfer over OUT DMA */ 721 static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on) 722 { 723 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN, 724 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0); 725 } 726 727 /* enable/disable analog IN DMA */ 728 static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on) 729 { 730 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN, 731 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0); 732 } 733 734 /* start/stop analog IN DMA */ 735 static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on) 736 { 737 if (on) { 738 unsigned int data = atiixp_read(chip, CMD); 739 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) { 740 data |= ATI_REG_CMD_MODEM_RECEIVE_EN; 741 atiixp_write(chip, CMD, data); 742 } 743 } else 744 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0); 745 } 746 747 /* flush FIFO of analog IN DMA */ 748 static void atiixp_in_flush_dma(struct atiixp_modem *chip) 749 { 750 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH); 751 } 752 753 /* set up slots and formats for analog OUT */ 754 static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream) 755 { 756 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 757 unsigned int data; 758 759 spin_lock_irq(&chip->reg_lock); 760 /* set output threshold */ 761 data = atiixp_read(chip, MODEM_OUT_FIFO); 762 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK; 763 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT; 764 atiixp_write(chip, MODEM_OUT_FIFO, data); 765 spin_unlock_irq(&chip->reg_lock); 766 return 0; 767 } 768 769 /* set up slots and formats for analog IN */ 770 static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream) 771 { 772 return 0; 773 } 774 775 /* 776 * hw_params - allocate the buffer and set up buffer descriptors 777 */ 778 static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream, 779 struct snd_pcm_hw_params *hw_params) 780 { 781 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 782 struct atiixp_dma *dma = substream->runtime->private_data; 783 int err; 784 int i; 785 786 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); 787 if (err < 0) 788 return err; 789 dma->buf_addr = substream->runtime->dma_addr; 790 dma->buf_bytes = params_buffer_bytes(hw_params); 791 792 err = atiixp_build_dma_packets(chip, dma, substream, 793 params_periods(hw_params), 794 params_period_bytes(hw_params)); 795 if (err < 0) 796 return err; 797 798 /* set up modem rate */ 799 for (i = 0; i < NUM_ATI_CODECS; i++) { 800 if (! chip->ac97[i]) 801 continue; 802 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params)); 803 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0); 804 } 805 806 return err; 807 } 808 809 static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream) 810 { 811 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 812 struct atiixp_dma *dma = substream->runtime->private_data; 813 814 atiixp_clear_dma_packets(chip, dma, substream); 815 snd_pcm_lib_free_pages(substream); 816 return 0; 817 } 818 819 820 /* 821 * pcm hardware definition, identical for all DMA types 822 */ 823 static const struct snd_pcm_hardware snd_atiixp_pcm_hw = 824 { 825 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 826 SNDRV_PCM_INFO_BLOCK_TRANSFER | 827 SNDRV_PCM_INFO_MMAP_VALID), 828 .formats = SNDRV_PCM_FMTBIT_S16_LE, 829 .rates = (SNDRV_PCM_RATE_8000 | 830 SNDRV_PCM_RATE_16000 | 831 SNDRV_PCM_RATE_KNOT), 832 .rate_min = 8000, 833 .rate_max = 16000, 834 .channels_min = 2, 835 .channels_max = 2, 836 .buffer_bytes_max = 256 * 1024, 837 .period_bytes_min = 32, 838 .period_bytes_max = 128 * 1024, 839 .periods_min = 2, 840 .periods_max = ATI_MAX_DESCRIPTORS, 841 }; 842 843 static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream, 844 struct atiixp_dma *dma, int pcm_type) 845 { 846 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 847 struct snd_pcm_runtime *runtime = substream->runtime; 848 int err; 849 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 }; 850 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = { 851 .count = ARRAY_SIZE(rates), 852 .list = rates, 853 .mask = 0, 854 }; 855 856 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma)) 857 return -EINVAL; 858 859 if (dma->opened) 860 return -EBUSY; 861 dma->substream = substream; 862 runtime->hw = snd_atiixp_pcm_hw; 863 dma->ac97_pcm_type = pcm_type; 864 if ((err = snd_pcm_hw_constraint_list(runtime, 0, 865 SNDRV_PCM_HW_PARAM_RATE, 866 &hw_constraints_rates)) < 0) 867 return err; 868 if ((err = snd_pcm_hw_constraint_integer(runtime, 869 SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 870 return err; 871 runtime->private_data = dma; 872 873 /* enable DMA bits */ 874 spin_lock_irq(&chip->reg_lock); 875 dma->ops->enable_dma(chip, 1); 876 spin_unlock_irq(&chip->reg_lock); 877 dma->opened = 1; 878 879 return 0; 880 } 881 882 static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream, 883 struct atiixp_dma *dma) 884 { 885 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 886 /* disable DMA bits */ 887 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma)) 888 return -EINVAL; 889 spin_lock_irq(&chip->reg_lock); 890 dma->ops->enable_dma(chip, 0); 891 spin_unlock_irq(&chip->reg_lock); 892 dma->substream = NULL; 893 dma->opened = 0; 894 return 0; 895 } 896 897 /* 898 */ 899 static int snd_atiixp_playback_open(struct snd_pcm_substream *substream) 900 { 901 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 902 int err; 903 904 mutex_lock(&chip->open_mutex); 905 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0); 906 mutex_unlock(&chip->open_mutex); 907 if (err < 0) 908 return err; 909 return 0; 910 } 911 912 static int snd_atiixp_playback_close(struct snd_pcm_substream *substream) 913 { 914 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 915 int err; 916 mutex_lock(&chip->open_mutex); 917 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]); 918 mutex_unlock(&chip->open_mutex); 919 return err; 920 } 921 922 static int snd_atiixp_capture_open(struct snd_pcm_substream *substream) 923 { 924 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 925 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1); 926 } 927 928 static int snd_atiixp_capture_close(struct snd_pcm_substream *substream) 929 { 930 struct atiixp_modem *chip = snd_pcm_substream_chip(substream); 931 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]); 932 } 933 934 935 /* AC97 playback */ 936 static const struct snd_pcm_ops snd_atiixp_playback_ops = { 937 .open = snd_atiixp_playback_open, 938 .close = snd_atiixp_playback_close, 939 .ioctl = snd_pcm_lib_ioctl, 940 .hw_params = snd_atiixp_pcm_hw_params, 941 .hw_free = snd_atiixp_pcm_hw_free, 942 .prepare = snd_atiixp_playback_prepare, 943 .trigger = snd_atiixp_pcm_trigger, 944 .pointer = snd_atiixp_pcm_pointer, 945 }; 946 947 /* AC97 capture */ 948 static const struct snd_pcm_ops snd_atiixp_capture_ops = { 949 .open = snd_atiixp_capture_open, 950 .close = snd_atiixp_capture_close, 951 .ioctl = snd_pcm_lib_ioctl, 952 .hw_params = snd_atiixp_pcm_hw_params, 953 .hw_free = snd_atiixp_pcm_hw_free, 954 .prepare = snd_atiixp_capture_prepare, 955 .trigger = snd_atiixp_pcm_trigger, 956 .pointer = snd_atiixp_pcm_pointer, 957 }; 958 959 static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = { 960 .type = ATI_DMA_PLAYBACK, 961 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR, 962 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR, 963 .enable_dma = atiixp_out_enable_dma, 964 .enable_transfer = atiixp_out_enable_transfer, 965 .flush_dma = atiixp_out_flush_dma, 966 }; 967 968 static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = { 969 .type = ATI_DMA_CAPTURE, 970 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR, 971 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR, 972 .enable_dma = atiixp_in_enable_dma, 973 .enable_transfer = atiixp_in_enable_transfer, 974 .flush_dma = atiixp_in_flush_dma, 975 }; 976 977 static int snd_atiixp_pcm_new(struct atiixp_modem *chip) 978 { 979 struct snd_pcm *pcm; 980 int err; 981 982 /* initialize constants */ 983 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops; 984 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops; 985 986 /* PCM #0: analog I/O */ 987 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm); 988 if (err < 0) 989 return err; 990 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops); 991 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops); 992 pcm->dev_class = SNDRV_PCM_CLASS_MODEM; 993 pcm->private_data = chip; 994 strcpy(pcm->name, "ATI IXP MC97"); 995 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm; 996 997 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, 998 snd_dma_pci_data(chip->pci), 999 64*1024, 128*1024); 1000 1001 return 0; 1002 } 1003 1004 1005 1006 /* 1007 * interrupt handler 1008 */ 1009 static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id) 1010 { 1011 struct atiixp_modem *chip = dev_id; 1012 unsigned int status; 1013 1014 status = atiixp_read(chip, ISR); 1015 1016 if (! status) 1017 return IRQ_NONE; 1018 1019 /* process audio DMA */ 1020 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN) 1021 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]); 1022 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS) 1023 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]); 1024 if (status & ATI_REG_ISR_MODEM_IN_XRUN) 1025 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]); 1026 else if (status & ATI_REG_ISR_MODEM_IN_STATUS) 1027 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]); 1028 1029 /* for codec detection */ 1030 if (status & CODEC_CHECK_BITS) { 1031 unsigned int detected; 1032 detected = status & CODEC_CHECK_BITS; 1033 spin_lock(&chip->reg_lock); 1034 chip->codec_not_ready_bits |= detected; 1035 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */ 1036 spin_unlock(&chip->reg_lock); 1037 } 1038 1039 /* ack */ 1040 atiixp_write(chip, ISR, status); 1041 1042 return IRQ_HANDLED; 1043 } 1044 1045 1046 /* 1047 * ac97 mixer section 1048 */ 1049 1050 static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock) 1051 { 1052 struct snd_ac97_bus *pbus; 1053 struct snd_ac97_template ac97; 1054 int i, err; 1055 int codec_count; 1056 static struct snd_ac97_bus_ops ops = { 1057 .write = snd_atiixp_ac97_write, 1058 .read = snd_atiixp_ac97_read, 1059 }; 1060 static unsigned int codec_skip[NUM_ATI_CODECS] = { 1061 ATI_REG_ISR_CODEC0_NOT_READY, 1062 ATI_REG_ISR_CODEC1_NOT_READY, 1063 ATI_REG_ISR_CODEC2_NOT_READY, 1064 }; 1065 1066 if (snd_atiixp_codec_detect(chip) < 0) 1067 return -ENXIO; 1068 1069 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0) 1070 return err; 1071 pbus->clock = clock; 1072 chip->ac97_bus = pbus; 1073 1074 codec_count = 0; 1075 for (i = 0; i < NUM_ATI_CODECS; i++) { 1076 if (chip->codec_not_ready_bits & codec_skip[i]) 1077 continue; 1078 memset(&ac97, 0, sizeof(ac97)); 1079 ac97.private_data = chip; 1080 ac97.pci = chip->pci; 1081 ac97.num = i; 1082 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; 1083 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) { 1084 chip->ac97[i] = NULL; /* to be sure */ 1085 dev_dbg(chip->card->dev, 1086 "codec %d not available for modem\n", i); 1087 continue; 1088 } 1089 codec_count++; 1090 } 1091 1092 if (! codec_count) { 1093 dev_err(chip->card->dev, "no codec available\n"); 1094 return -ENODEV; 1095 } 1096 1097 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */ 1098 1099 return 0; 1100 } 1101 1102 1103 #ifdef CONFIG_PM_SLEEP 1104 /* 1105 * power management 1106 */ 1107 static int snd_atiixp_suspend(struct device *dev) 1108 { 1109 struct snd_card *card = dev_get_drvdata(dev); 1110 struct atiixp_modem *chip = card->private_data; 1111 int i; 1112 1113 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); 1114 for (i = 0; i < NUM_ATI_CODECS; i++) 1115 snd_ac97_suspend(chip->ac97[i]); 1116 snd_atiixp_aclink_down(chip); 1117 snd_atiixp_chip_stop(chip); 1118 return 0; 1119 } 1120 1121 static int snd_atiixp_resume(struct device *dev) 1122 { 1123 struct snd_card *card = dev_get_drvdata(dev); 1124 struct atiixp_modem *chip = card->private_data; 1125 int i; 1126 1127 snd_atiixp_aclink_reset(chip); 1128 snd_atiixp_chip_start(chip); 1129 1130 for (i = 0; i < NUM_ATI_CODECS; i++) 1131 snd_ac97_resume(chip->ac97[i]); 1132 1133 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 1134 return 0; 1135 } 1136 1137 static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume); 1138 #define SND_ATIIXP_PM_OPS &snd_atiixp_pm 1139 #else 1140 #define SND_ATIIXP_PM_OPS NULL 1141 #endif /* CONFIG_PM_SLEEP */ 1142 1143 /* 1144 * proc interface for register dump 1145 */ 1146 1147 static void snd_atiixp_proc_read(struct snd_info_entry *entry, 1148 struct snd_info_buffer *buffer) 1149 { 1150 struct atiixp_modem *chip = entry->private_data; 1151 int i; 1152 1153 for (i = 0; i < 256; i += 4) 1154 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i)); 1155 } 1156 1157 static void snd_atiixp_proc_init(struct atiixp_modem *chip) 1158 { 1159 snd_card_ro_proc_new(chip->card, "atiixp-modem", chip, 1160 snd_atiixp_proc_read); 1161 } 1162 1163 1164 /* 1165 * destructor 1166 */ 1167 1168 static int snd_atiixp_free(struct atiixp_modem *chip) 1169 { 1170 if (chip->irq < 0) 1171 goto __hw_end; 1172 snd_atiixp_chip_stop(chip); 1173 1174 __hw_end: 1175 if (chip->irq >= 0) 1176 free_irq(chip->irq, chip); 1177 iounmap(chip->remap_addr); 1178 pci_release_regions(chip->pci); 1179 pci_disable_device(chip->pci); 1180 kfree(chip); 1181 return 0; 1182 } 1183 1184 static int snd_atiixp_dev_free(struct snd_device *device) 1185 { 1186 struct atiixp_modem *chip = device->device_data; 1187 return snd_atiixp_free(chip); 1188 } 1189 1190 /* 1191 * constructor for chip instance 1192 */ 1193 static int snd_atiixp_create(struct snd_card *card, 1194 struct pci_dev *pci, 1195 struct atiixp_modem **r_chip) 1196 { 1197 static struct snd_device_ops ops = { 1198 .dev_free = snd_atiixp_dev_free, 1199 }; 1200 struct atiixp_modem *chip; 1201 int err; 1202 1203 if ((err = pci_enable_device(pci)) < 0) 1204 return err; 1205 1206 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 1207 if (chip == NULL) { 1208 pci_disable_device(pci); 1209 return -ENOMEM; 1210 } 1211 1212 spin_lock_init(&chip->reg_lock); 1213 mutex_init(&chip->open_mutex); 1214 chip->card = card; 1215 chip->pci = pci; 1216 chip->irq = -1; 1217 if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) { 1218 kfree(chip); 1219 pci_disable_device(pci); 1220 return err; 1221 } 1222 chip->addr = pci_resource_start(pci, 0); 1223 chip->remap_addr = pci_ioremap_bar(pci, 0); 1224 if (chip->remap_addr == NULL) { 1225 dev_err(card->dev, "AC'97 space ioremap problem\n"); 1226 snd_atiixp_free(chip); 1227 return -EIO; 1228 } 1229 1230 if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED, 1231 KBUILD_MODNAME, chip)) { 1232 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); 1233 snd_atiixp_free(chip); 1234 return -EBUSY; 1235 } 1236 chip->irq = pci->irq; 1237 pci_set_master(pci); 1238 synchronize_irq(chip->irq); 1239 1240 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { 1241 snd_atiixp_free(chip); 1242 return err; 1243 } 1244 1245 *r_chip = chip; 1246 return 0; 1247 } 1248 1249 1250 static int snd_atiixp_probe(struct pci_dev *pci, 1251 const struct pci_device_id *pci_id) 1252 { 1253 struct snd_card *card; 1254 struct atiixp_modem *chip; 1255 int err; 1256 1257 err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card); 1258 if (err < 0) 1259 return err; 1260 1261 strcpy(card->driver, "ATIIXP-MODEM"); 1262 strcpy(card->shortname, "ATI IXP Modem"); 1263 if ((err = snd_atiixp_create(card, pci, &chip)) < 0) 1264 goto __error; 1265 card->private_data = chip; 1266 1267 if ((err = snd_atiixp_aclink_reset(chip)) < 0) 1268 goto __error; 1269 1270 if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0) 1271 goto __error; 1272 1273 if ((err = snd_atiixp_pcm_new(chip)) < 0) 1274 goto __error; 1275 1276 snd_atiixp_proc_init(chip); 1277 1278 snd_atiixp_chip_start(chip); 1279 1280 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i", 1281 card->shortname, pci->revision, chip->addr, chip->irq); 1282 1283 if ((err = snd_card_register(card)) < 0) 1284 goto __error; 1285 1286 pci_set_drvdata(pci, card); 1287 return 0; 1288 1289 __error: 1290 snd_card_free(card); 1291 return err; 1292 } 1293 1294 static void snd_atiixp_remove(struct pci_dev *pci) 1295 { 1296 snd_card_free(pci_get_drvdata(pci)); 1297 } 1298 1299 static struct pci_driver atiixp_modem_driver = { 1300 .name = KBUILD_MODNAME, 1301 .id_table = snd_atiixp_ids, 1302 .probe = snd_atiixp_probe, 1303 .remove = snd_atiixp_remove, 1304 .driver = { 1305 .pm = SND_ATIIXP_PM_OPS, 1306 }, 1307 }; 1308 1309 module_pci_driver(atiixp_modem_driver); 1310