| 1 | /* |
| 2 | * Driver for the Conexant CX25821 PCIe bridge |
| 3 | * |
| 4 | * Copyright (C) 2009 Conexant Systems Inc. |
| 5 | * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> |
| 6 | * Based on SAA713x ALSA driver and CX88 driver |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation, version 2 |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 24 | |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/vmalloc.h> |
| 30 | #include <linux/dma-mapping.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/slab.h> |
| 33 | |
| 34 | #include <linux/delay.h> |
| 35 | #include <sound/core.h> |
| 36 | #include <sound/pcm.h> |
| 37 | #include <sound/pcm_params.h> |
| 38 | #include <sound/control.h> |
| 39 | #include <sound/initval.h> |
| 40 | #include <sound/tlv.h> |
| 41 | |
| 42 | #include "cx25821.h" |
| 43 | #include "cx25821-reg.h" |
| 44 | |
| 45 | #define AUDIO_SRAM_CHANNEL SRAM_CH08 |
| 46 | |
| 47 | #define dprintk(level, fmt, arg...) \ |
| 48 | do { \ |
| 49 | if (debug >= level) \ |
| 50 | pr_info("%s/1: " fmt, chip->dev->name, ##arg); \ |
| 51 | } while (0) |
| 52 | #define dprintk_core(level, fmt, arg...) \ |
| 53 | do { \ |
| 54 | if (debug >= level) \ |
| 55 | printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \ |
| 56 | } while (0) |
| 57 | |
| 58 | /**************************************************************************** |
| 59 | Data type declarations - Can be moded to a header file later |
| 60 | ****************************************************************************/ |
| 61 | |
| 62 | static struct snd_card *snd_cx25821_cards[SNDRV_CARDS]; |
| 63 | static int devno; |
| 64 | |
| 65 | struct cx25821_audio_buffer { |
| 66 | unsigned int bpl; |
| 67 | struct btcx_riscmem risc; |
| 68 | struct videobuf_dmabuf dma; |
| 69 | }; |
| 70 | |
| 71 | struct cx25821_audio_dev { |
| 72 | struct cx25821_dev *dev; |
| 73 | struct cx25821_dmaqueue q; |
| 74 | |
| 75 | /* pci i/o */ |
| 76 | struct pci_dev *pci; |
| 77 | |
| 78 | /* audio controls */ |
| 79 | int irq; |
| 80 | |
| 81 | struct snd_card *card; |
| 82 | |
| 83 | unsigned long iobase; |
| 84 | spinlock_t reg_lock; |
| 85 | atomic_t count; |
| 86 | |
| 87 | unsigned int dma_size; |
| 88 | unsigned int period_size; |
| 89 | unsigned int num_periods; |
| 90 | |
| 91 | struct videobuf_dmabuf *dma_risc; |
| 92 | |
| 93 | struct cx25821_audio_buffer *buf; |
| 94 | |
| 95 | struct snd_pcm_substream *substream; |
| 96 | }; |
| 97 | |
| 98 | |
| 99 | /**************************************************************************** |
| 100 | Module global static vars |
| 101 | ****************************************************************************/ |
| 102 | |
| 103 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
| 104 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
| 105 | static int enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 }; |
| 106 | |
| 107 | module_param_array(enable, bool, NULL, 0444); |
| 108 | MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled."); |
| 109 | |
| 110 | module_param_array(index, int, NULL, 0444); |
| 111 | MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s)."); |
| 112 | |
| 113 | /**************************************************************************** |
| 114 | Module macros |
| 115 | ****************************************************************************/ |
| 116 | |
| 117 | MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards"); |
| 118 | MODULE_AUTHOR("Hiep Huynh"); |
| 119 | MODULE_LICENSE("GPL"); |
| 120 | MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */ |
| 121 | |
| 122 | static unsigned int debug; |
| 123 | module_param(debug, int, 0644); |
| 124 | MODULE_PARM_DESC(debug, "enable debug messages"); |
| 125 | |
| 126 | /**************************************************************************** |
| 127 | Module specific funtions |
| 128 | ****************************************************************************/ |
| 129 | /* Constants taken from cx88-reg.h */ |
| 130 | #define AUD_INT_DN_RISCI1 (1 << 0) |
| 131 | #define AUD_INT_UP_RISCI1 (1 << 1) |
| 132 | #define AUD_INT_RDS_DN_RISCI1 (1 << 2) |
| 133 | #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ |
| 134 | #define AUD_INT_UP_RISCI2 (1 << 5) |
| 135 | #define AUD_INT_RDS_DN_RISCI2 (1 << 6) |
| 136 | #define AUD_INT_DN_SYNC (1 << 12) |
| 137 | #define AUD_INT_UP_SYNC (1 << 13) |
| 138 | #define AUD_INT_RDS_DN_SYNC (1 << 14) |
| 139 | #define AUD_INT_OPC_ERR (1 << 16) |
| 140 | #define AUD_INT_BER_IRQ (1 << 20) |
| 141 | #define AUD_INT_MCHG_IRQ (1 << 21) |
| 142 | #define GP_COUNT_CONTROL_RESET 0x3 |
| 143 | |
| 144 | #define PCI_MSK_AUD_EXT (1 << 4) |
| 145 | #define PCI_MSK_AUD_INT (1 << 3) |
| 146 | /* |
| 147 | * BOARD Specific: Sets audio DMA |
| 148 | */ |
| 149 | |
| 150 | static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip) |
| 151 | { |
| 152 | struct cx25821_audio_buffer *buf = chip->buf; |
| 153 | struct cx25821_dev *dev = chip->dev; |
| 154 | struct sram_channel *audio_ch = |
| 155 | &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; |
| 156 | u32 tmp = 0; |
| 157 | |
| 158 | /* enable output on the GPIO 0 for the MCLK ADC (Audio) */ |
| 159 | cx25821_set_gpiopin_direction(chip->dev, 0, 0); |
| 160 | |
| 161 | /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ |
| 162 | cx_clear(AUD_INT_DMA_CTL, |
| 163 | FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); |
| 164 | |
| 165 | /* setup fifo + format - out channel */ |
| 166 | cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, |
| 167 | buf->risc.dma); |
| 168 | |
| 169 | /* sets bpl size */ |
| 170 | cx_write(AUD_A_LNGTH, buf->bpl); |
| 171 | |
| 172 | /* reset counter */ |
| 173 | /* GP_COUNT_CONTROL_RESET = 0x3 */ |
| 174 | cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); |
| 175 | atomic_set(&chip->count, 0); |
| 176 | |
| 177 | /* Set the input mode to 16-bit */ |
| 178 | tmp = cx_read(AUD_A_CFG); |
| 179 | cx_write(AUD_A_CFG, |
| 180 | tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | |
| 181 | FLD_AUD_CLK_ENABLE); |
| 182 | |
| 183 | /* |
| 184 | pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", |
| 185 | buf->bpl, audio_ch->cmds_start, |
| 186 | cx_read(audio_ch->cmds_start + 12)>>1, |
| 187 | chip->num_periods, buf->bpl * chip->num_periods); |
| 188 | */ |
| 189 | |
| 190 | /* Enables corresponding bits at AUD_INT_STAT */ |
| 191 | cx_write(AUD_A_INT_MSK, |
| 192 | FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC | |
| 193 | FLD_AUD_DST_OPC_ERR); |
| 194 | |
| 195 | /* Clean any pending interrupt bits already set */ |
| 196 | cx_write(AUD_A_INT_STAT, ~0); |
| 197 | |
| 198 | /* enable audio irqs */ |
| 199 | cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); |
| 200 | |
| 201 | /* Turn on audio downstream fifo and risc enable 0x101 */ |
| 202 | tmp = cx_read(AUD_INT_DMA_CTL); |
| 203 | cx_set(AUD_INT_DMA_CTL, |
| 204 | tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); |
| 205 | |
| 206 | mdelay(100); |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | /* |
| 211 | * BOARD Specific: Resets audio DMA |
| 212 | */ |
| 213 | static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) |
| 214 | { |
| 215 | struct cx25821_dev *dev = chip->dev; |
| 216 | |
| 217 | /* stop dma */ |
| 218 | cx_clear(AUD_INT_DMA_CTL, |
| 219 | FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); |
| 220 | |
| 221 | /* disable irqs */ |
| 222 | cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); |
| 223 | cx_clear(AUD_A_INT_MSK, |
| 224 | AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 | |
| 225 | AUD_INT_DN_RISCI1); |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | #define MAX_IRQ_LOOP 50 |
| 231 | |
| 232 | /* |
| 233 | * BOARD Specific: IRQ dma bits |
| 234 | */ |
| 235 | static char *cx25821_aud_irqs[32] = { |
| 236 | "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ |
| 237 | NULL, /* reserved */ |
| 238 | "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ |
| 239 | NULL, /* reserved */ |
| 240 | "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ |
| 241 | NULL, /* reserved */ |
| 242 | "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ |
| 243 | NULL, /* reserved */ |
| 244 | "opc_err", "par_err", "rip_err", /* 16-18 */ |
| 245 | "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ |
| 246 | }; |
| 247 | |
| 248 | /* |
| 249 | * BOARD Specific: Threats IRQ audio specific calls |
| 250 | */ |
| 251 | static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, |
| 252 | u32 mask) |
| 253 | { |
| 254 | struct cx25821_dev *dev = chip->dev; |
| 255 | |
| 256 | if (0 == (status & mask)) |
| 257 | return; |
| 258 | |
| 259 | cx_write(AUD_A_INT_STAT, status); |
| 260 | if (debug > 1 || (status & mask & ~0xff)) |
| 261 | cx25821_print_irqbits(dev->name, "irq aud", |
| 262 | cx25821_aud_irqs, |
| 263 | ARRAY_SIZE(cx25821_aud_irqs), status, |
| 264 | mask); |
| 265 | |
| 266 | /* risc op code error */ |
| 267 | if (status & AUD_INT_OPC_ERR) { |
| 268 | pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); |
| 269 | |
| 270 | cx_clear(AUD_INT_DMA_CTL, |
| 271 | FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); |
| 272 | cx25821_sram_channel_dump_audio(dev, |
| 273 | &cx25821_sram_channels |
| 274 | [AUDIO_SRAM_CHANNEL]); |
| 275 | } |
| 276 | if (status & AUD_INT_DN_SYNC) { |
| 277 | pr_warn("WARNING %s: Downstream sync error!\n", dev->name); |
| 278 | cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); |
| 279 | return; |
| 280 | } |
| 281 | |
| 282 | /* risc1 downstream */ |
| 283 | if (status & AUD_INT_DN_RISCI1) { |
| 284 | atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); |
| 285 | snd_pcm_period_elapsed(chip->substream); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * BOARD Specific: Handles IRQ calls |
| 291 | */ |
| 292 | static irqreturn_t cx25821_irq(int irq, void *dev_id) |
| 293 | { |
| 294 | struct cx25821_audio_dev *chip = dev_id; |
| 295 | struct cx25821_dev *dev = chip->dev; |
| 296 | u32 status, pci_status; |
| 297 | u32 audint_status, audint_mask; |
| 298 | int loop, handled = 0; |
| 299 | int audint_count = 0; |
| 300 | |
| 301 | audint_status = cx_read(AUD_A_INT_STAT); |
| 302 | audint_mask = cx_read(AUD_A_INT_MSK); |
| 303 | audint_count = cx_read(AUD_A_GPCNT); |
| 304 | status = cx_read(PCI_INT_STAT); |
| 305 | |
| 306 | for (loop = 0; loop < 1; loop++) { |
| 307 | status = cx_read(PCI_INT_STAT); |
| 308 | if (0 == status) { |
| 309 | status = cx_read(PCI_INT_STAT); |
| 310 | audint_status = cx_read(AUD_A_INT_STAT); |
| 311 | audint_mask = cx_read(AUD_A_INT_MSK); |
| 312 | |
| 313 | if (status) { |
| 314 | handled = 1; |
| 315 | cx_write(PCI_INT_STAT, status); |
| 316 | |
| 317 | cx25821_aud_irq(chip, audint_status, |
| 318 | audint_mask); |
| 319 | break; |
| 320 | } else |
| 321 | goto out; |
| 322 | } |
| 323 | |
| 324 | handled = 1; |
| 325 | cx_write(PCI_INT_STAT, status); |
| 326 | |
| 327 | cx25821_aud_irq(chip, audint_status, audint_mask); |
| 328 | } |
| 329 | |
| 330 | pci_status = cx_read(PCI_INT_STAT); |
| 331 | |
| 332 | if (handled) |
| 333 | cx_write(PCI_INT_STAT, pci_status); |
| 334 | |
| 335 | out: |
| 336 | return IRQ_RETVAL(handled); |
| 337 | } |
| 338 | |
| 339 | static int dsp_buffer_free(struct cx25821_audio_dev *chip) |
| 340 | { |
| 341 | BUG_ON(!chip->dma_size); |
| 342 | |
| 343 | dprintk(2, "Freeing buffer\n"); |
| 344 | videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc); |
| 345 | videobuf_dma_free(chip->dma_risc); |
| 346 | btcx_riscmem_free(chip->pci, &chip->buf->risc); |
| 347 | kfree(chip->buf); |
| 348 | |
| 349 | chip->dma_risc = NULL; |
| 350 | chip->dma_size = 0; |
| 351 | |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | /**************************************************************************** |
| 356 | ALSA PCM Interface |
| 357 | ****************************************************************************/ |
| 358 | |
| 359 | /* |
| 360 | * Digital hardware definition |
| 361 | */ |
| 362 | #define DEFAULT_FIFO_SIZE 384 |
| 363 | static struct snd_pcm_hardware snd_cx25821_digital_hw = { |
| 364 | .info = SNDRV_PCM_INFO_MMAP | |
| 365 | SNDRV_PCM_INFO_INTERLEAVED | |
| 366 | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID, |
| 367 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 368 | |
| 369 | .rates = SNDRV_PCM_RATE_48000, |
| 370 | .rate_min = 48000, |
| 371 | .rate_max = 48000, |
| 372 | .channels_min = 2, |
| 373 | .channels_max = 2, |
| 374 | /* Analog audio output will be full of clicks and pops if there |
| 375 | are not exactly four lines in the SRAM FIFO buffer. */ |
| 376 | .period_bytes_min = DEFAULT_FIFO_SIZE / 3, |
| 377 | .period_bytes_max = DEFAULT_FIFO_SIZE / 3, |
| 378 | .periods_min = 1, |
| 379 | .periods_max = AUDIO_LINE_SIZE, |
| 380 | /* 128 * 128 = 16384 = 1024 * 16 */ |
| 381 | .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), |
| 382 | }; |
| 383 | |
| 384 | /* |
| 385 | * audio pcm capture open callback |
| 386 | */ |
| 387 | static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) |
| 388 | { |
| 389 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); |
| 390 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 391 | int err; |
| 392 | unsigned int bpl = 0; |
| 393 | |
| 394 | if (!chip) { |
| 395 | pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n"); |
| 396 | return -ENODEV; |
| 397 | } |
| 398 | |
| 399 | err = |
| 400 | snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS); |
| 401 | if (err < 0) |
| 402 | goto _error; |
| 403 | |
| 404 | chip->substream = substream; |
| 405 | |
| 406 | runtime->hw = snd_cx25821_digital_hw; |
| 407 | |
| 408 | if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != |
| 409 | DEFAULT_FIFO_SIZE) { |
| 410 | /* since there are 3 audio Clusters */ |
| 411 | bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; |
| 412 | bpl &= ~7; /* must be multiple of 8 */ |
| 413 | |
| 414 | if (bpl > AUDIO_LINE_SIZE) |
| 415 | bpl = AUDIO_LINE_SIZE; |
| 416 | |
| 417 | runtime->hw.period_bytes_min = bpl; |
| 418 | runtime->hw.period_bytes_max = bpl; |
| 419 | } |
| 420 | |
| 421 | return 0; |
| 422 | _error: |
| 423 | dprintk(1, "Error opening PCM!\n"); |
| 424 | return err; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * audio close callback |
| 429 | */ |
| 430 | static int snd_cx25821_close(struct snd_pcm_substream *substream) |
| 431 | { |
| 432 | return 0; |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * hw_params callback |
| 437 | */ |
| 438 | static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, |
| 439 | struct snd_pcm_hw_params *hw_params) |
| 440 | { |
| 441 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); |
| 442 | struct videobuf_dmabuf *dma; |
| 443 | |
| 444 | struct cx25821_audio_buffer *buf; |
| 445 | int ret; |
| 446 | |
| 447 | if (substream->runtime->dma_area) { |
| 448 | dsp_buffer_free(chip); |
| 449 | substream->runtime->dma_area = NULL; |
| 450 | } |
| 451 | |
| 452 | chip->period_size = params_period_bytes(hw_params); |
| 453 | chip->num_periods = params_periods(hw_params); |
| 454 | chip->dma_size = chip->period_size * params_periods(hw_params); |
| 455 | |
| 456 | BUG_ON(!chip->dma_size); |
| 457 | BUG_ON(chip->num_periods & (chip->num_periods - 1)); |
| 458 | |
| 459 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); |
| 460 | if (NULL == buf) |
| 461 | return -ENOMEM; |
| 462 | |
| 463 | if (chip->period_size > AUDIO_LINE_SIZE) |
| 464 | chip->period_size = AUDIO_LINE_SIZE; |
| 465 | |
| 466 | buf->bpl = chip->period_size; |
| 467 | |
| 468 | dma = &buf->dma; |
| 469 | videobuf_dma_init(dma); |
| 470 | ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE, |
| 471 | (PAGE_ALIGN(chip->dma_size) >> |
| 472 | PAGE_SHIFT)); |
| 473 | if (ret < 0) |
| 474 | goto error; |
| 475 | |
| 476 | ret = videobuf_dma_map(&chip->pci->dev, dma); |
| 477 | if (ret < 0) |
| 478 | goto error; |
| 479 | |
| 480 | ret = |
| 481 | cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist, |
| 482 | chip->period_size, chip->num_periods, |
| 483 | 1); |
| 484 | if (ret < 0) { |
| 485 | pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); |
| 486 | goto error; |
| 487 | } |
| 488 | |
| 489 | /* Loop back to start of program */ |
| 490 | buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); |
| 491 | buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); |
| 492 | buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ |
| 493 | |
| 494 | chip->buf = buf; |
| 495 | chip->dma_risc = dma; |
| 496 | |
| 497 | substream->runtime->dma_area = chip->dma_risc->vaddr; |
| 498 | substream->runtime->dma_bytes = chip->dma_size; |
| 499 | substream->runtime->dma_addr = 0; |
| 500 | |
| 501 | return 0; |
| 502 | |
| 503 | error: |
| 504 | kfree(buf); |
| 505 | return ret; |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * hw free callback |
| 510 | */ |
| 511 | static int snd_cx25821_hw_free(struct snd_pcm_substream *substream) |
| 512 | { |
| 513 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); |
| 514 | |
| 515 | if (substream->runtime->dma_area) { |
| 516 | dsp_buffer_free(chip); |
| 517 | substream->runtime->dma_area = NULL; |
| 518 | } |
| 519 | |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * prepare callback |
| 525 | */ |
| 526 | static int snd_cx25821_prepare(struct snd_pcm_substream *substream) |
| 527 | { |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * trigger callback |
| 533 | */ |
| 534 | static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, |
| 535 | int cmd) |
| 536 | { |
| 537 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); |
| 538 | int err = 0; |
| 539 | |
| 540 | /* Local interrupts are already disabled by ALSA */ |
| 541 | spin_lock(&chip->reg_lock); |
| 542 | |
| 543 | switch (cmd) { |
| 544 | case SNDRV_PCM_TRIGGER_START: |
| 545 | err = _cx25821_start_audio_dma(chip); |
| 546 | break; |
| 547 | case SNDRV_PCM_TRIGGER_STOP: |
| 548 | err = _cx25821_stop_audio_dma(chip); |
| 549 | break; |
| 550 | default: |
| 551 | err = -EINVAL; |
| 552 | break; |
| 553 | } |
| 554 | |
| 555 | spin_unlock(&chip->reg_lock); |
| 556 | |
| 557 | return err; |
| 558 | } |
| 559 | |
| 560 | /* |
| 561 | * pointer callback |
| 562 | */ |
| 563 | static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream |
| 564 | *substream) |
| 565 | { |
| 566 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); |
| 567 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 568 | u16 count; |
| 569 | |
| 570 | count = atomic_read(&chip->count); |
| 571 | |
| 572 | return runtime->period_size * (count & (runtime->periods - 1)); |
| 573 | } |
| 574 | |
| 575 | /* |
| 576 | * page callback (needed for mmap) |
| 577 | */ |
| 578 | static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, |
| 579 | unsigned long offset) |
| 580 | { |
| 581 | void *pageptr = substream->runtime->dma_area + offset; |
| 582 | |
| 583 | return vmalloc_to_page(pageptr); |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * operators |
| 588 | */ |
| 589 | static struct snd_pcm_ops snd_cx25821_pcm_ops = { |
| 590 | .open = snd_cx25821_pcm_open, |
| 591 | .close = snd_cx25821_close, |
| 592 | .ioctl = snd_pcm_lib_ioctl, |
| 593 | .hw_params = snd_cx25821_hw_params, |
| 594 | .hw_free = snd_cx25821_hw_free, |
| 595 | .prepare = snd_cx25821_prepare, |
| 596 | .trigger = snd_cx25821_card_trigger, |
| 597 | .pointer = snd_cx25821_pointer, |
| 598 | .page = snd_cx25821_page, |
| 599 | }; |
| 600 | |
| 601 | /* |
| 602 | * ALSA create a PCM device: Called when initializing the board. |
| 603 | * Sets up the name and hooks up the callbacks |
| 604 | */ |
| 605 | static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, |
| 606 | char *name) |
| 607 | { |
| 608 | struct snd_pcm *pcm; |
| 609 | int err; |
| 610 | |
| 611 | err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); |
| 612 | if (err < 0) { |
| 613 | pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); |
| 614 | return err; |
| 615 | } |
| 616 | pcm->private_data = chip; |
| 617 | pcm->info_flags = 0; |
| 618 | strcpy(pcm->name, name); |
| 619 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); |
| 620 | |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | /**************************************************************************** |
| 625 | Basic Flow for Sound Devices |
| 626 | ****************************************************************************/ |
| 627 | |
| 628 | /* |
| 629 | * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio |
| 630 | * Only boards with eeprom and byte 1 at eeprom=1 have it |
| 631 | */ |
| 632 | |
| 633 | static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = { |
| 634 | {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 635 | {0,} |
| 636 | }; |
| 637 | |
| 638 | MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); |
| 639 | |
| 640 | /* |
| 641 | * Not used in the function snd_cx25821_dev_free so removing |
| 642 | * from the file. |
| 643 | */ |
| 644 | /* |
| 645 | static int snd_cx25821_free(struct cx25821_audio_dev *chip) |
| 646 | { |
| 647 | if (chip->irq >= 0) |
| 648 | free_irq(chip->irq, chip); |
| 649 | |
| 650 | cx25821_dev_unregister(chip->dev); |
| 651 | pci_disable_device(chip->pci); |
| 652 | |
| 653 | return 0; |
| 654 | } |
| 655 | */ |
| 656 | |
| 657 | /* |
| 658 | * Component Destructor |
| 659 | */ |
| 660 | static void snd_cx25821_dev_free(struct snd_card *card) |
| 661 | { |
| 662 | struct cx25821_audio_dev *chip = card->private_data; |
| 663 | |
| 664 | /* snd_cx25821_free(chip); */ |
| 665 | snd_card_free(chip->card); |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Alsa Constructor - Component probe |
| 670 | */ |
| 671 | static int cx25821_audio_initdev(struct cx25821_dev *dev) |
| 672 | { |
| 673 | struct snd_card *card; |
| 674 | struct cx25821_audio_dev *chip; |
| 675 | int err; |
| 676 | |
| 677 | if (devno >= SNDRV_CARDS) { |
| 678 | pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); |
| 679 | return -ENODEV; |
| 680 | } |
| 681 | |
| 682 | if (!enable[devno]) { |
| 683 | ++devno; |
| 684 | pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); |
| 685 | return -ENOENT; |
| 686 | } |
| 687 | |
| 688 | err = snd_card_create(index[devno], id[devno], THIS_MODULE, |
| 689 | sizeof(struct cx25821_audio_dev), &card); |
| 690 | if (err < 0) { |
| 691 | pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", |
| 692 | __func__); |
| 693 | return err; |
| 694 | } |
| 695 | |
| 696 | strcpy(card->driver, "cx25821"); |
| 697 | |
| 698 | /* Card "creation" */ |
| 699 | card->private_free = snd_cx25821_dev_free; |
| 700 | chip = card->private_data; |
| 701 | spin_lock_init(&chip->reg_lock); |
| 702 | |
| 703 | chip->dev = dev; |
| 704 | chip->card = card; |
| 705 | chip->pci = dev->pci; |
| 706 | chip->iobase = pci_resource_start(dev->pci, 0); |
| 707 | |
| 708 | chip->irq = dev->pci->irq; |
| 709 | |
| 710 | err = request_irq(dev->pci->irq, cx25821_irq, |
| 711 | IRQF_SHARED, chip->dev->name, chip); |
| 712 | |
| 713 | if (err < 0) { |
| 714 | pr_err("ERROR %s: can't get IRQ %d for ALSA\n", |
| 715 | chip->dev->name, dev->pci->irq); |
| 716 | goto error; |
| 717 | } |
| 718 | |
| 719 | err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); |
| 720 | if (err < 0) { |
| 721 | pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", |
| 722 | __func__); |
| 723 | goto error; |
| 724 | } |
| 725 | |
| 726 | snd_card_set_dev(card, &chip->pci->dev); |
| 727 | |
| 728 | strcpy(card->shortname, "cx25821"); |
| 729 | sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, |
| 730 | chip->iobase, chip->irq); |
| 731 | strcpy(card->mixername, "CX25821"); |
| 732 | |
| 733 | pr_info("%s/%i: ALSA support for cx25821 boards\n", |
| 734 | card->driver, devno); |
| 735 | |
| 736 | err = snd_card_register(card); |
| 737 | if (err < 0) { |
| 738 | pr_info("DEBUG ERROR: cannot register sound card %s\n", |
| 739 | __func__); |
| 740 | goto error; |
| 741 | } |
| 742 | |
| 743 | snd_cx25821_cards[devno] = card; |
| 744 | |
| 745 | devno++; |
| 746 | return 0; |
| 747 | |
| 748 | error: |
| 749 | snd_card_free(card); |
| 750 | return err; |
| 751 | } |
| 752 | |
| 753 | /**************************************************************************** |
| 754 | LINUX MODULE INIT |
| 755 | ****************************************************************************/ |
| 756 | static void cx25821_audio_fini(void) |
| 757 | { |
| 758 | snd_card_free(snd_cx25821_cards[0]); |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * Module initializer |
| 763 | * |
| 764 | * Loops through present saa7134 cards, and assigns an ALSA device |
| 765 | * to each one |
| 766 | * |
| 767 | */ |
| 768 | static int cx25821_alsa_init(void) |
| 769 | { |
| 770 | struct cx25821_dev *dev = NULL; |
| 771 | struct list_head *list; |
| 772 | |
| 773 | mutex_lock(&cx25821_devlist_mutex); |
| 774 | list_for_each(list, &cx25821_devlist) { |
| 775 | dev = list_entry(list, struct cx25821_dev, devlist); |
| 776 | cx25821_audio_initdev(dev); |
| 777 | } |
| 778 | mutex_unlock(&cx25821_devlist_mutex); |
| 779 | |
| 780 | if (dev == NULL) |
| 781 | pr_info("ERROR ALSA: no cx25821 cards found\n"); |
| 782 | |
| 783 | return 0; |
| 784 | |
| 785 | } |
| 786 | |
| 787 | late_initcall(cx25821_alsa_init); |
| 788 | module_exit(cx25821_audio_fini); |
| 789 | |
| 790 | /* ----------------------------------------------------------- */ |
| 791 | /* |
| 792 | * Local variables: |
| 793 | * c-basic-offset: 8 |
| 794 | * End: |
| 795 | */ |