Cedric Bregardis | 98f2a97 | 2008-02-20 12:05:13 +0100 | [diff] [blame] | 1 | /***************************************************************************** |
| 2 | * |
| 3 | * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and |
| 4 | * Jean-Christian Hassler <jhassler@free.fr> |
| 5 | * |
| 6 | * This file is part of the Audiowerk2 ALSA driver |
| 7 | * |
| 8 | * The Audiowerk2 ALSA driver is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; version 2. |
| 11 | * |
| 12 | * The Audiowerk2 ALSA driver 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 the Audiowerk2 ALSA driver; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 20 | * USA. |
| 21 | * |
| 22 | *****************************************************************************/ |
| 23 | |
| 24 | #define AW2_SAA7146_M |
| 25 | |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/pci.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/delay.h> |
| 31 | #include <asm/system.h> |
| 32 | #include <asm/io.h> |
| 33 | #include <sound/core.h> |
| 34 | #include <sound/initval.h> |
| 35 | #include <sound/pcm.h> |
| 36 | #include <sound/pcm_params.h> |
| 37 | |
Cedric Bregardis | 98f2a97 | 2008-02-20 12:05:13 +0100 | [diff] [blame] | 38 | #include "saa7146.h" |
| 39 | #include "aw2-saa7146.h" |
| 40 | |
Takashi Iwai | 9166257 | 2008-03-10 12:19:12 +0100 | [diff] [blame] | 41 | #include "aw2-tsl.c" |
| 42 | |
Cedric Bregardis | 98f2a97 | 2008-02-20 12:05:13 +0100 | [diff] [blame] | 43 | #define WRITEREG(value, addr) writel((value), chip->base_addr + (addr)) |
| 44 | #define READREG(addr) readl(chip->base_addr + (addr)) |
| 45 | |
| 46 | static struct snd_aw2_saa7146_cb_param |
| 47 | arr_substream_it_playback_cb[NB_STREAM_PLAYBACK]; |
| 48 | static struct snd_aw2_saa7146_cb_param |
| 49 | arr_substream_it_capture_cb[NB_STREAM_CAPTURE]; |
| 50 | |
| 51 | static int snd_aw2_saa7146_get_limit(int size); |
| 52 | |
| 53 | /* chip-specific destructor */ |
| 54 | int snd_aw2_saa7146_free(struct snd_aw2_saa7146 *chip) |
| 55 | { |
| 56 | /* disable all irqs */ |
| 57 | WRITEREG(0, IER); |
| 58 | |
| 59 | /* reset saa7146 */ |
| 60 | WRITEREG((MRST_N << 16), MC1); |
| 61 | |
| 62 | /* Unset base addr */ |
| 63 | chip->base_addr = NULL; |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | void snd_aw2_saa7146_setup(struct snd_aw2_saa7146 *chip, |
| 69 | void __iomem *pci_base_addr) |
| 70 | { |
| 71 | /* set PCI burst/threshold |
| 72 | |
| 73 | Burst length definition |
| 74 | VALUE BURST LENGTH |
| 75 | 000 1 Dword |
| 76 | 001 2 Dwords |
| 77 | 010 4 Dwords |
| 78 | 011 8 Dwords |
| 79 | 100 16 Dwords |
| 80 | 101 32 Dwords |
| 81 | 110 64 Dwords |
| 82 | 111 128 Dwords |
| 83 | |
| 84 | Threshold definition |
| 85 | VALUE WRITE MODE READ MODE |
| 86 | 00 1 Dword of valid data 1 empty Dword |
| 87 | 01 4 Dwords of valid data 4 empty Dwords |
| 88 | 10 8 Dwords of valid data 8 empty Dwords |
| 89 | 11 16 Dwords of valid data 16 empty Dwords */ |
| 90 | |
| 91 | unsigned int acon2; |
| 92 | unsigned int acon1 = 0; |
| 93 | int i; |
| 94 | |
| 95 | /* Set base addr */ |
| 96 | chip->base_addr = pci_base_addr; |
| 97 | |
| 98 | /* disable all irqs */ |
| 99 | WRITEREG(0, IER); |
| 100 | |
| 101 | /* reset saa7146 */ |
| 102 | WRITEREG((MRST_N << 16), MC1); |
| 103 | |
| 104 | /* enable audio interface */ |
| 105 | #ifdef __BIG_ENDIAN |
| 106 | acon1 |= A1_SWAP; |
| 107 | acon1 |= A2_SWAP; |
| 108 | #endif |
| 109 | /* WS0_CTRL, WS0_SYNC: input TSL1, I2S */ |
| 110 | |
| 111 | /* At initialization WS1 and WS2 are disbaled (configured as input */ |
| 112 | acon1 |= 0 * WS1_CTRL; |
| 113 | acon1 |= 0 * WS2_CTRL; |
| 114 | |
| 115 | /* WS4 is not used. So it must not restart A2. |
| 116 | This is why it is configured as output (force to low) */ |
| 117 | acon1 |= 3 * WS4_CTRL; |
| 118 | |
| 119 | /* WS3_CTRL, WS3_SYNC: output TSL2, I2S */ |
| 120 | acon1 |= 2 * WS3_CTRL; |
| 121 | |
| 122 | /* A1 and A2 are active and asynchronous */ |
| 123 | acon1 |= 3 * AUDIO_MODE; |
| 124 | WRITEREG(acon1, ACON1); |
| 125 | |
| 126 | /* The following comes from original windows driver. |
| 127 | It is needed to have a correct behavior of input and output |
| 128 | simultenously, but I don't know why ! */ |
| 129 | WRITEREG(3 * (BurstA1_in) + 3 * (ThreshA1_in) + |
| 130 | 3 * (BurstA1_out) + 3 * (ThreshA1_out) + |
| 131 | 3 * (BurstA2_out) + 3 * (ThreshA2_out), PCI_BT_A); |
| 132 | |
| 133 | /* enable audio port pins */ |
| 134 | WRITEREG((EAP << 16) | EAP, MC1); |
| 135 | |
| 136 | /* enable I2C */ |
| 137 | WRITEREG((EI2C << 16) | EI2C, MC1); |
| 138 | /* enable interrupts */ |
| 139 | WRITEREG(A1_out | A2_out | A1_in | IIC_S | IIC_E, IER); |
| 140 | |
| 141 | /* audio configuration */ |
| 142 | acon2 = A2_CLKSRC | BCLK1_OEN; |
| 143 | WRITEREG(acon2, ACON2); |
| 144 | |
| 145 | /* By default use analog input */ |
| 146 | snd_aw2_saa7146_use_digital_input(chip, 0); |
| 147 | |
| 148 | /* TSL setup */ |
| 149 | for (i = 0; i < 8; ++i) { |
| 150 | WRITEREG(tsl1[i], TSL1 + (i * 4)); |
| 151 | WRITEREG(tsl2[i], TSL2 + (i * 4)); |
| 152 | } |
| 153 | |
| 154 | } |
| 155 | |
| 156 | void snd_aw2_saa7146_pcm_init_playback(struct snd_aw2_saa7146 *chip, |
| 157 | int stream_number, |
| 158 | unsigned long dma_addr, |
| 159 | unsigned long period_size, |
| 160 | unsigned long buffer_size) |
| 161 | { |
| 162 | unsigned long dw_page, dw_limit; |
| 163 | |
| 164 | /* Configure DMA for substream |
| 165 | Configuration informations: ALSA has allocated continuous memory |
| 166 | pages. So we don't need to use MMU of saa7146. |
| 167 | */ |
| 168 | |
| 169 | /* No MMU -> nothing to do with PageA1, we only configure the limit of |
| 170 | PageAx_out register */ |
| 171 | /* Disable MMU */ |
| 172 | dw_page = (0L << 11); |
| 173 | |
| 174 | /* Configure Limit for DMA access. |
| 175 | The limit register defines an address limit, which generates |
| 176 | an interrupt if passed by the actual PCI address pointer. |
| 177 | '0001' means an interrupt will be generated if the lower |
| 178 | 6 bits (64 bytes) of the PCI address are zero. '0010' |
| 179 | defines a limit of 128 bytes, '0011' one of 256 bytes, and |
| 180 | so on up to 1 Mbyte defined by '1111'. This interrupt range |
| 181 | can be calculated as follows: |
| 182 | Range = 2^(5 + Limit) bytes. |
| 183 | */ |
| 184 | dw_limit = snd_aw2_saa7146_get_limit(period_size); |
| 185 | dw_page |= (dw_limit << 4); |
| 186 | |
| 187 | if (stream_number == 0) { |
| 188 | WRITEREG(dw_page, PageA2_out); |
| 189 | |
| 190 | /* Base address for DMA transfert. */ |
| 191 | /* This address has been reserved by ALSA. */ |
| 192 | /* This is a physical address */ |
| 193 | WRITEREG(dma_addr, BaseA2_out); |
| 194 | |
| 195 | /* Define upper limit for DMA access */ |
| 196 | WRITEREG(dma_addr + buffer_size, ProtA2_out); |
| 197 | |
| 198 | } else if (stream_number == 1) { |
| 199 | WRITEREG(dw_page, PageA1_out); |
| 200 | |
| 201 | /* Base address for DMA transfert. */ |
| 202 | /* This address has been reserved by ALSA. */ |
| 203 | /* This is a physical address */ |
| 204 | WRITEREG(dma_addr, BaseA1_out); |
| 205 | |
| 206 | /* Define upper limit for DMA access */ |
| 207 | WRITEREG(dma_addr + buffer_size, ProtA1_out); |
| 208 | } else { |
| 209 | printk(KERN_ERR |
| 210 | "aw2: snd_aw2_saa7146_pcm_init_playback: " |
| 211 | "Substream number is not 0 or 1 -> not managed\n"); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | void snd_aw2_saa7146_pcm_init_capture(struct snd_aw2_saa7146 *chip, |
| 216 | int stream_number, unsigned long dma_addr, |
| 217 | unsigned long period_size, |
| 218 | unsigned long buffer_size) |
| 219 | { |
| 220 | unsigned long dw_page, dw_limit; |
| 221 | |
| 222 | /* Configure DMA for substream |
| 223 | Configuration informations: ALSA has allocated continuous memory |
| 224 | pages. So we don't need to use MMU of saa7146. |
| 225 | */ |
| 226 | |
| 227 | /* No MMU -> nothing to do with PageA1, we only configure the limit of |
| 228 | PageAx_out register */ |
| 229 | /* Disable MMU */ |
| 230 | dw_page = (0L << 11); |
| 231 | |
| 232 | /* Configure Limit for DMA access. |
| 233 | The limit register defines an address limit, which generates |
| 234 | an interrupt if passed by the actual PCI address pointer. |
| 235 | '0001' means an interrupt will be generated if the lower |
| 236 | 6 bits (64 bytes) of the PCI address are zero. '0010' |
| 237 | defines a limit of 128 bytes, '0011' one of 256 bytes, and |
| 238 | so on up to 1 Mbyte defined by '1111'. This interrupt range |
| 239 | can be calculated as follows: |
| 240 | Range = 2^(5 + Limit) bytes. |
| 241 | */ |
| 242 | dw_limit = snd_aw2_saa7146_get_limit(period_size); |
| 243 | dw_page |= (dw_limit << 4); |
| 244 | |
| 245 | if (stream_number == 0) { |
| 246 | WRITEREG(dw_page, PageA1_in); |
| 247 | |
| 248 | /* Base address for DMA transfert. */ |
| 249 | /* This address has been reserved by ALSA. */ |
| 250 | /* This is a physical address */ |
| 251 | WRITEREG(dma_addr, BaseA1_in); |
| 252 | |
| 253 | /* Define upper limit for DMA access */ |
| 254 | WRITEREG(dma_addr + buffer_size, ProtA1_in); |
| 255 | } else { |
| 256 | printk(KERN_ERR |
| 257 | "aw2: snd_aw2_saa7146_pcm_init_capture: " |
| 258 | "Substream number is not 0 -> not managed\n"); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | void snd_aw2_saa7146_define_it_playback_callback(unsigned int stream_number, |
| 263 | snd_aw2_saa7146_it_cb |
| 264 | p_it_callback, |
| 265 | void *p_callback_param) |
| 266 | { |
| 267 | if (stream_number < NB_STREAM_PLAYBACK) { |
| 268 | arr_substream_it_playback_cb[stream_number].p_it_callback = |
| 269 | (snd_aw2_saa7146_it_cb) p_it_callback; |
| 270 | arr_substream_it_playback_cb[stream_number].p_callback_param = |
| 271 | (void *)p_callback_param; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | void snd_aw2_saa7146_define_it_capture_callback(unsigned int stream_number, |
| 276 | snd_aw2_saa7146_it_cb |
| 277 | p_it_callback, |
| 278 | void *p_callback_param) |
| 279 | { |
| 280 | if (stream_number < NB_STREAM_CAPTURE) { |
| 281 | arr_substream_it_capture_cb[stream_number].p_it_callback = |
| 282 | (snd_aw2_saa7146_it_cb) p_it_callback; |
| 283 | arr_substream_it_capture_cb[stream_number].p_callback_param = |
| 284 | (void *)p_callback_param; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | void snd_aw2_saa7146_pcm_trigger_start_playback(struct snd_aw2_saa7146 *chip, |
| 289 | int stream_number) |
| 290 | { |
| 291 | unsigned int acon1 = 0; |
| 292 | /* In aw8 driver, dma transfert is always active. It is |
| 293 | started and stopped in a larger "space" */ |
| 294 | acon1 = READREG(ACON1); |
| 295 | if (stream_number == 0) { |
| 296 | WRITEREG((TR_E_A2_OUT << 16) | TR_E_A2_OUT, MC1); |
| 297 | |
| 298 | /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */ |
| 299 | acon1 |= 2 * WS2_CTRL; |
| 300 | WRITEREG(acon1, ACON1); |
| 301 | |
| 302 | } else if (stream_number == 1) { |
| 303 | WRITEREG((TR_E_A1_OUT << 16) | TR_E_A1_OUT, MC1); |
| 304 | |
| 305 | /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */ |
| 306 | acon1 |= 1 * WS1_CTRL; |
| 307 | WRITEREG(acon1, ACON1); |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | void snd_aw2_saa7146_pcm_trigger_stop_playback(struct snd_aw2_saa7146 *chip, |
| 312 | int stream_number) |
| 313 | { |
| 314 | unsigned int acon1 = 0; |
| 315 | acon1 = READREG(ACON1); |
| 316 | if (stream_number == 0) { |
| 317 | /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */ |
| 318 | acon1 &= ~(3 * WS2_CTRL); |
| 319 | WRITEREG(acon1, ACON1); |
| 320 | |
| 321 | WRITEREG((TR_E_A2_OUT << 16), MC1); |
| 322 | } else if (stream_number == 1) { |
| 323 | /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */ |
| 324 | acon1 &= ~(3 * WS1_CTRL); |
| 325 | WRITEREG(acon1, ACON1); |
| 326 | |
| 327 | WRITEREG((TR_E_A1_OUT << 16), MC1); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | void snd_aw2_saa7146_pcm_trigger_start_capture(struct snd_aw2_saa7146 *chip, |
| 332 | int stream_number) |
| 333 | { |
| 334 | /* In aw8 driver, dma transfert is always active. It is |
| 335 | started and stopped in a larger "space" */ |
| 336 | if (stream_number == 0) |
| 337 | WRITEREG((TR_E_A1_IN << 16) | TR_E_A1_IN, MC1); |
| 338 | } |
| 339 | |
| 340 | void snd_aw2_saa7146_pcm_trigger_stop_capture(struct snd_aw2_saa7146 *chip, |
| 341 | int stream_number) |
| 342 | { |
| 343 | if (stream_number == 0) |
| 344 | WRITEREG((TR_E_A1_IN << 16), MC1); |
| 345 | } |
| 346 | |
| 347 | irqreturn_t snd_aw2_saa7146_interrupt(int irq, void *dev_id) |
| 348 | { |
| 349 | unsigned int isr; |
| 350 | unsigned int iicsta; |
| 351 | struct snd_aw2_saa7146 *chip = dev_id; |
| 352 | |
| 353 | isr = READREG(ISR); |
| 354 | if (!isr) |
| 355 | return IRQ_NONE; |
| 356 | |
| 357 | WRITEREG(isr, ISR); |
| 358 | |
| 359 | if (isr & (IIC_S | IIC_E)) { |
| 360 | iicsta = READREG(IICSTA); |
| 361 | WRITEREG(0x100, IICSTA); |
| 362 | } |
| 363 | |
| 364 | if (isr & A1_out) { |
| 365 | if (arr_substream_it_playback_cb[1].p_it_callback != NULL) { |
| 366 | arr_substream_it_playback_cb[1]. |
| 367 | p_it_callback(arr_substream_it_playback_cb[1]. |
| 368 | p_callback_param); |
| 369 | } |
| 370 | } |
| 371 | if (isr & A2_out) { |
| 372 | if (arr_substream_it_playback_cb[0].p_it_callback != NULL) { |
| 373 | arr_substream_it_playback_cb[0]. |
| 374 | p_it_callback(arr_substream_it_playback_cb[0]. |
| 375 | p_callback_param); |
| 376 | } |
| 377 | |
| 378 | } |
| 379 | if (isr & A1_in) { |
| 380 | if (arr_substream_it_capture_cb[0].p_it_callback != NULL) { |
| 381 | arr_substream_it_capture_cb[0]. |
| 382 | p_it_callback(arr_substream_it_capture_cb[0]. |
| 383 | p_callback_param); |
| 384 | } |
| 385 | } |
| 386 | return IRQ_HANDLED; |
| 387 | } |
| 388 | |
| 389 | unsigned int snd_aw2_saa7146_get_hw_ptr_playback(struct snd_aw2_saa7146 *chip, |
| 390 | int stream_number, |
| 391 | unsigned char *start_addr, |
| 392 | unsigned int buffer_size) |
| 393 | { |
| 394 | long pci_adp = 0; |
| 395 | size_t ptr = 0; |
| 396 | |
| 397 | if (stream_number == 0) { |
| 398 | pci_adp = READREG(PCI_ADP3); |
| 399 | ptr = pci_adp - (long)start_addr; |
| 400 | |
| 401 | if (ptr == buffer_size) |
| 402 | ptr = 0; |
| 403 | } |
| 404 | if (stream_number == 1) { |
| 405 | pci_adp = READREG(PCI_ADP1); |
| 406 | ptr = pci_adp - (size_t) start_addr; |
| 407 | |
| 408 | if (ptr == buffer_size) |
| 409 | ptr = 0; |
| 410 | } |
| 411 | return ptr; |
| 412 | } |
| 413 | |
| 414 | unsigned int snd_aw2_saa7146_get_hw_ptr_capture(struct snd_aw2_saa7146 *chip, |
| 415 | int stream_number, |
| 416 | unsigned char *start_addr, |
| 417 | unsigned int buffer_size) |
| 418 | { |
| 419 | size_t pci_adp = 0; |
| 420 | size_t ptr = 0; |
| 421 | if (stream_number == 0) { |
| 422 | pci_adp = READREG(PCI_ADP2); |
| 423 | ptr = pci_adp - (size_t) start_addr; |
| 424 | |
| 425 | if (ptr == buffer_size) |
| 426 | ptr = 0; |
| 427 | } |
| 428 | return ptr; |
| 429 | } |
| 430 | |
| 431 | void snd_aw2_saa7146_use_digital_input(struct snd_aw2_saa7146 *chip, |
| 432 | int use_digital) |
| 433 | { |
| 434 | /* FIXME: switch between analog and digital input does not always work. |
| 435 | It can produce a kind of white noise. It seams that received data |
| 436 | are inverted sometime (endian inversion). Why ? I don't know, maybe |
| 437 | a problem of synchronization... However for the time being I have |
| 438 | not found the problem. Workaround: switch again (and again) between |
| 439 | digital and analog input until it works. */ |
| 440 | if (use_digital) |
| 441 | WRITEREG(0x40, GPIO_CTRL); |
| 442 | else |
| 443 | WRITEREG(0x50, GPIO_CTRL); |
| 444 | } |
| 445 | |
| 446 | int snd_aw2_saa7146_is_using_digital_input(struct snd_aw2_saa7146 *chip) |
| 447 | { |
| 448 | unsigned int reg_val = READREG(GPIO_CTRL); |
| 449 | if ((reg_val & 0xFF) == 0x40) |
| 450 | return 1; |
| 451 | else |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | |
| 456 | static int snd_aw2_saa7146_get_limit(int size) |
| 457 | { |
| 458 | int limitsize = 32; |
| 459 | int limit = 0; |
| 460 | while (limitsize < size) { |
| 461 | limitsize *= 2; |
| 462 | limit++; |
| 463 | } |
| 464 | return limit; |
| 465 | } |