Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1 | /* |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 2 | * Driver for Atmel AC97C |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005-2009 Atmel Corporation |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published by |
| 8 | * the Free Software Foundation. |
| 9 | */ |
| 10 | #include <linux/clk.h> |
| 11 | #include <linux/delay.h> |
| 12 | #include <linux/bitmap.h> |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 13 | #include <linux/device.h> |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 14 | #include <linux/dmaengine.h> |
| 15 | #include <linux/dma-mapping.h> |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 16 | #include <linux/atmel_pdc.h> |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 17 | #include <linux/init.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/mutex.h> |
| 22 | #include <linux/gpio.h> |
| 23 | #include <linux/io.h> |
| 24 | |
| 25 | #include <sound/core.h> |
| 26 | #include <sound/initval.h> |
| 27 | #include <sound/pcm.h> |
| 28 | #include <sound/pcm_params.h> |
| 29 | #include <sound/ac97_codec.h> |
| 30 | #include <sound/atmel-ac97c.h> |
| 31 | #include <sound/memalloc.h> |
| 32 | |
| 33 | #include <linux/dw_dmac.h> |
| 34 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 35 | #include <mach/cpu.h> |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 36 | #include <mach/gpio.h> |
| 37 | |
Hans-Christian Egtvedt | fd76804 | 2011-01-24 16:09:56 +0100 | [diff] [blame] | 38 | #ifdef CONFIG_ARCH_AT91 |
| 39 | #include <mach/hardware.h> |
| 40 | #endif |
| 41 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 42 | #include "ac97c.h" |
| 43 | |
| 44 | enum { |
| 45 | DMA_TX_READY = 0, |
| 46 | DMA_RX_READY, |
| 47 | DMA_TX_CHAN_PRESENT, |
| 48 | DMA_RX_CHAN_PRESENT, |
| 49 | }; |
| 50 | |
| 51 | /* Serialize access to opened variable */ |
| 52 | static DEFINE_MUTEX(opened_mutex); |
| 53 | |
| 54 | struct atmel_ac97c_dma { |
| 55 | struct dma_chan *rx_chan; |
| 56 | struct dma_chan *tx_chan; |
| 57 | }; |
| 58 | |
| 59 | struct atmel_ac97c { |
| 60 | struct clk *pclk; |
| 61 | struct platform_device *pdev; |
| 62 | struct atmel_ac97c_dma dma; |
| 63 | |
| 64 | struct snd_pcm_substream *playback_substream; |
| 65 | struct snd_pcm_substream *capture_substream; |
| 66 | struct snd_card *card; |
| 67 | struct snd_pcm *pcm; |
| 68 | struct snd_ac97 *ac97; |
| 69 | struct snd_ac97_bus *ac97_bus; |
| 70 | |
| 71 | u64 cur_format; |
| 72 | unsigned int cur_rate; |
| 73 | unsigned long flags; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 74 | int playback_period, capture_period; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 75 | /* Serialize access to opened variable */ |
| 76 | spinlock_t lock; |
| 77 | void __iomem *regs; |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 78 | int irq; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 79 | int opened; |
| 80 | int reset_pin; |
| 81 | }; |
| 82 | |
| 83 | #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data) |
| 84 | |
| 85 | #define ac97c_writel(chip, reg, val) \ |
| 86 | __raw_writel((val), (chip)->regs + AC97C_##reg) |
| 87 | #define ac97c_readl(chip, reg) \ |
| 88 | __raw_readl((chip)->regs + AC97C_##reg) |
| 89 | |
| 90 | /* This function is called by the DMA driver. */ |
| 91 | static void atmel_ac97c_dma_playback_period_done(void *arg) |
| 92 | { |
| 93 | struct atmel_ac97c *chip = arg; |
| 94 | snd_pcm_period_elapsed(chip->playback_substream); |
| 95 | } |
| 96 | |
| 97 | static void atmel_ac97c_dma_capture_period_done(void *arg) |
| 98 | { |
| 99 | struct atmel_ac97c *chip = arg; |
| 100 | snd_pcm_period_elapsed(chip->capture_substream); |
| 101 | } |
| 102 | |
| 103 | static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip, |
| 104 | struct snd_pcm_substream *substream, |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 105 | enum dma_transfer_direction direction) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 106 | { |
| 107 | struct dma_chan *chan; |
| 108 | struct dw_cyclic_desc *cdesc; |
| 109 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 110 | unsigned long buffer_len, period_len; |
| 111 | |
| 112 | /* |
| 113 | * We don't do DMA on "complex" transfers, i.e. with |
| 114 | * non-halfword-aligned buffers or lengths. |
| 115 | */ |
| 116 | if (runtime->dma_addr & 1 || runtime->buffer_size & 1) { |
| 117 | dev_dbg(&chip->pdev->dev, "too complex transfer\n"); |
| 118 | return -EINVAL; |
| 119 | } |
| 120 | |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 121 | if (direction == DMA_MEM_TO_DEV) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 122 | chan = chip->dma.tx_chan; |
| 123 | else |
| 124 | chan = chip->dma.rx_chan; |
| 125 | |
| 126 | buffer_len = frames_to_bytes(runtime, runtime->buffer_size); |
| 127 | period_len = frames_to_bytes(runtime, runtime->period_size); |
| 128 | |
| 129 | cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len, |
| 130 | period_len, direction); |
| 131 | if (IS_ERR(cdesc)) { |
| 132 | dev_dbg(&chip->pdev->dev, "could not prepare cyclic DMA\n"); |
| 133 | return PTR_ERR(cdesc); |
| 134 | } |
| 135 | |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 136 | if (direction == DMA_MEM_TO_DEV) { |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 137 | cdesc->period_callback = atmel_ac97c_dma_playback_period_done; |
| 138 | set_bit(DMA_TX_READY, &chip->flags); |
| 139 | } else { |
| 140 | cdesc->period_callback = atmel_ac97c_dma_capture_period_done; |
| 141 | set_bit(DMA_RX_READY, &chip->flags); |
| 142 | } |
| 143 | |
| 144 | cdesc->period_callback_param = chip; |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static struct snd_pcm_hardware atmel_ac97c_hw = { |
| 150 | .info = (SNDRV_PCM_INFO_MMAP |
| 151 | | SNDRV_PCM_INFO_MMAP_VALID |
| 152 | | SNDRV_PCM_INFO_INTERLEAVED |
| 153 | | SNDRV_PCM_INFO_BLOCK_TRANSFER |
| 154 | | SNDRV_PCM_INFO_JOINT_DUPLEX |
| 155 | | SNDRV_PCM_INFO_RESUME |
| 156 | | SNDRV_PCM_INFO_PAUSE), |
| 157 | .formats = (SNDRV_PCM_FMTBIT_S16_BE |
| 158 | | SNDRV_PCM_FMTBIT_S16_LE), |
| 159 | .rates = (SNDRV_PCM_RATE_CONTINUOUS), |
| 160 | .rate_min = 4000, |
| 161 | .rate_max = 48000, |
| 162 | .channels_min = 1, |
| 163 | .channels_max = 2, |
Hans-Christian Egtvedt | c42eec0 | 2009-04-02 08:21:13 +0200 | [diff] [blame] | 164 | .buffer_bytes_max = 2 * 2 * 64 * 2048, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 165 | .period_bytes_min = 4096, |
| 166 | .period_bytes_max = 4096, |
Hans-Christian Egtvedt | c42eec0 | 2009-04-02 08:21:13 +0200 | [diff] [blame] | 167 | .periods_min = 6, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 168 | .periods_max = 64, |
| 169 | }; |
| 170 | |
| 171 | static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream) |
| 172 | { |
| 173 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 174 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 175 | |
| 176 | mutex_lock(&opened_mutex); |
| 177 | chip->opened++; |
| 178 | runtime->hw = atmel_ac97c_hw; |
| 179 | if (chip->cur_rate) { |
| 180 | runtime->hw.rate_min = chip->cur_rate; |
| 181 | runtime->hw.rate_max = chip->cur_rate; |
| 182 | } |
| 183 | if (chip->cur_format) |
| 184 | runtime->hw.formats = (1ULL << chip->cur_format); |
| 185 | mutex_unlock(&opened_mutex); |
| 186 | chip->playback_substream = substream; |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream) |
| 191 | { |
| 192 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 193 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 194 | |
| 195 | mutex_lock(&opened_mutex); |
| 196 | chip->opened++; |
| 197 | runtime->hw = atmel_ac97c_hw; |
| 198 | if (chip->cur_rate) { |
| 199 | runtime->hw.rate_min = chip->cur_rate; |
| 200 | runtime->hw.rate_max = chip->cur_rate; |
| 201 | } |
| 202 | if (chip->cur_format) |
| 203 | runtime->hw.formats = (1ULL << chip->cur_format); |
| 204 | mutex_unlock(&opened_mutex); |
| 205 | chip->capture_substream = substream; |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream) |
| 210 | { |
| 211 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 212 | |
| 213 | mutex_lock(&opened_mutex); |
| 214 | chip->opened--; |
| 215 | if (!chip->opened) { |
| 216 | chip->cur_rate = 0; |
| 217 | chip->cur_format = 0; |
| 218 | } |
| 219 | mutex_unlock(&opened_mutex); |
| 220 | |
| 221 | chip->playback_substream = NULL; |
| 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream) |
| 227 | { |
| 228 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 229 | |
| 230 | mutex_lock(&opened_mutex); |
| 231 | chip->opened--; |
| 232 | if (!chip->opened) { |
| 233 | chip->cur_rate = 0; |
| 234 | chip->cur_format = 0; |
| 235 | } |
| 236 | mutex_unlock(&opened_mutex); |
| 237 | |
| 238 | chip->capture_substream = NULL; |
| 239 | |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream, |
| 244 | struct snd_pcm_hw_params *hw_params) |
| 245 | { |
| 246 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 247 | int retval; |
| 248 | |
| 249 | retval = snd_pcm_lib_malloc_pages(substream, |
| 250 | params_buffer_bytes(hw_params)); |
| 251 | if (retval < 0) |
| 252 | return retval; |
| 253 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 254 | if (cpu_is_at32ap7000()) { |
| 255 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
| 256 | if (retval == 1) |
| 257 | if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) |
| 258 | dw_dma_cyclic_free(chip->dma.tx_chan); |
| 259 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 260 | /* Set restrictions to params. */ |
| 261 | mutex_lock(&opened_mutex); |
| 262 | chip->cur_rate = params_rate(hw_params); |
| 263 | chip->cur_format = params_format(hw_params); |
| 264 | mutex_unlock(&opened_mutex); |
| 265 | |
| 266 | return retval; |
| 267 | } |
| 268 | |
| 269 | static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream, |
| 270 | struct snd_pcm_hw_params *hw_params) |
| 271 | { |
| 272 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 273 | int retval; |
| 274 | |
| 275 | retval = snd_pcm_lib_malloc_pages(substream, |
| 276 | params_buffer_bytes(hw_params)); |
| 277 | if (retval < 0) |
| 278 | return retval; |
| 279 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 280 | if (cpu_is_at32ap7000()) { |
| 281 | if (retval < 0) |
| 282 | return retval; |
| 283 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
| 284 | if (retval == 1) |
| 285 | if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) |
| 286 | dw_dma_cyclic_free(chip->dma.rx_chan); |
| 287 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 288 | |
| 289 | /* Set restrictions to params. */ |
| 290 | mutex_lock(&opened_mutex); |
| 291 | chip->cur_rate = params_rate(hw_params); |
| 292 | chip->cur_format = params_format(hw_params); |
| 293 | mutex_unlock(&opened_mutex); |
| 294 | |
| 295 | return retval; |
| 296 | } |
| 297 | |
| 298 | static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream) |
| 299 | { |
| 300 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 301 | if (cpu_is_at32ap7000()) { |
| 302 | if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) |
| 303 | dw_dma_cyclic_free(chip->dma.tx_chan); |
| 304 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 305 | return snd_pcm_lib_free_pages(substream); |
| 306 | } |
| 307 | |
| 308 | static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream) |
| 309 | { |
| 310 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 311 | if (cpu_is_at32ap7000()) { |
| 312 | if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) |
| 313 | dw_dma_cyclic_free(chip->dma.rx_chan); |
| 314 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 315 | return snd_pcm_lib_free_pages(substream); |
| 316 | } |
| 317 | |
| 318 | static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream) |
| 319 | { |
| 320 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 321 | struct snd_pcm_runtime *runtime = substream->runtime; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 322 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 323 | unsigned long word = ac97c_readl(chip, OCA); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 324 | int retval; |
| 325 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 326 | chip->playback_period = 0; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 327 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 328 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 329 | /* assign channels to AC97C channel A */ |
| 330 | switch (runtime->channels) { |
| 331 | case 1: |
| 332 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); |
| 333 | break; |
| 334 | case 2: |
| 335 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) |
| 336 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); |
| 337 | break; |
| 338 | default: |
| 339 | /* TODO: support more than two channels */ |
| 340 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 341 | } |
| 342 | ac97c_writel(chip, OCA, word); |
| 343 | |
| 344 | /* configure sample format and size */ |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 345 | word = ac97c_readl(chip, CAMR); |
| 346 | if (chip->opened <= 1) |
| 347 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
| 348 | else |
| 349 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 350 | |
| 351 | switch (runtime->format) { |
| 352 | case SNDRV_PCM_FORMAT_S16_LE: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 353 | if (cpu_is_at32ap7000()) |
| 354 | word |= AC97C_CMR_CEM_LITTLE; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 355 | break; |
| 356 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 357 | word &= ~(AC97C_CMR_CEM_LITTLE); |
| 358 | break; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 359 | default: |
| 360 | word = ac97c_readl(chip, OCA); |
| 361 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 362 | ac97c_writel(chip, OCA, word); |
| 363 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 364 | } |
| 365 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 366 | /* Enable underrun interrupt on channel A */ |
| 367 | word |= AC97C_CSR_UNRUN; |
| 368 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 369 | ac97c_writel(chip, CAMR, word); |
| 370 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 371 | /* Enable channel A event interrupt */ |
| 372 | word = ac97c_readl(chip, IMR); |
| 373 | word |= AC97C_SR_CAEVT; |
| 374 | ac97c_writel(chip, IER, word); |
| 375 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 376 | /* set variable rate if needed */ |
| 377 | if (runtime->rate != 48000) { |
| 378 | word = ac97c_readl(chip, MR); |
| 379 | word |= AC97C_MR_VRA; |
| 380 | ac97c_writel(chip, MR, word); |
| 381 | } else { |
| 382 | word = ac97c_readl(chip, MR); |
| 383 | word &= ~(AC97C_MR_VRA); |
| 384 | ac97c_writel(chip, MR, word); |
| 385 | } |
| 386 | |
| 387 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, |
| 388 | runtime->rate); |
| 389 | if (retval) |
| 390 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", |
| 391 | runtime->rate); |
| 392 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 393 | if (cpu_is_at32ap7000()) { |
| 394 | if (!test_bit(DMA_TX_READY, &chip->flags)) |
| 395 | retval = atmel_ac97c_prepare_dma(chip, substream, |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 396 | DMA_MEM_TO_DEV); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 397 | } else { |
| 398 | /* Initialize and start the PDC */ |
| 399 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR); |
| 400 | writel(block_size / 2, chip->regs + ATMEL_PDC_TCR); |
| 401 | writel(runtime->dma_addr + block_size, |
| 402 | chip->regs + ATMEL_PDC_TNPR); |
| 403 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); |
| 404 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 405 | |
| 406 | return retval; |
| 407 | } |
| 408 | |
| 409 | static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) |
| 410 | { |
| 411 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 412 | struct snd_pcm_runtime *runtime = substream->runtime; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 413 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 414 | unsigned long word = ac97c_readl(chip, ICA); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 415 | int retval; |
| 416 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 417 | chip->capture_period = 0; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 418 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 419 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 420 | /* assign channels to AC97C channel A */ |
| 421 | switch (runtime->channels) { |
| 422 | case 1: |
| 423 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); |
| 424 | break; |
| 425 | case 2: |
| 426 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) |
| 427 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); |
| 428 | break; |
| 429 | default: |
| 430 | /* TODO: support more than two channels */ |
| 431 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 432 | } |
| 433 | ac97c_writel(chip, ICA, word); |
| 434 | |
| 435 | /* configure sample format and size */ |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 436 | word = ac97c_readl(chip, CAMR); |
| 437 | if (chip->opened <= 1) |
| 438 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
| 439 | else |
| 440 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 441 | |
| 442 | switch (runtime->format) { |
| 443 | case SNDRV_PCM_FORMAT_S16_LE: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 444 | if (cpu_is_at32ap7000()) |
| 445 | word |= AC97C_CMR_CEM_LITTLE; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 446 | break; |
| 447 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 448 | word &= ~(AC97C_CMR_CEM_LITTLE); |
| 449 | break; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 450 | default: |
| 451 | word = ac97c_readl(chip, ICA); |
| 452 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 453 | ac97c_writel(chip, ICA, word); |
| 454 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 455 | } |
| 456 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 457 | /* Enable overrun interrupt on channel A */ |
| 458 | word |= AC97C_CSR_OVRUN; |
| 459 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 460 | ac97c_writel(chip, CAMR, word); |
| 461 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 462 | /* Enable channel A event interrupt */ |
| 463 | word = ac97c_readl(chip, IMR); |
| 464 | word |= AC97C_SR_CAEVT; |
| 465 | ac97c_writel(chip, IER, word); |
| 466 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 467 | /* set variable rate if needed */ |
| 468 | if (runtime->rate != 48000) { |
| 469 | word = ac97c_readl(chip, MR); |
| 470 | word |= AC97C_MR_VRA; |
| 471 | ac97c_writel(chip, MR, word); |
| 472 | } else { |
| 473 | word = ac97c_readl(chip, MR); |
| 474 | word &= ~(AC97C_MR_VRA); |
| 475 | ac97c_writel(chip, MR, word); |
| 476 | } |
| 477 | |
| 478 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, |
| 479 | runtime->rate); |
| 480 | if (retval) |
| 481 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", |
| 482 | runtime->rate); |
| 483 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 484 | if (cpu_is_at32ap7000()) { |
| 485 | if (!test_bit(DMA_RX_READY, &chip->flags)) |
| 486 | retval = atmel_ac97c_prepare_dma(chip, substream, |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 487 | DMA_DEV_TO_MEM); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 488 | } else { |
| 489 | /* Initialize and start the PDC */ |
| 490 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR); |
| 491 | writel(block_size / 2, chip->regs + ATMEL_PDC_RCR); |
| 492 | writel(runtime->dma_addr + block_size, |
| 493 | chip->regs + ATMEL_PDC_RNPR); |
| 494 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); |
| 495 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 496 | |
| 497 | return retval; |
| 498 | } |
| 499 | |
| 500 | static int |
| 501 | atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
| 502 | { |
| 503 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 504 | unsigned long camr, ptcr = 0; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 505 | int retval = 0; |
| 506 | |
| 507 | camr = ac97c_readl(chip, CAMR); |
| 508 | |
| 509 | switch (cmd) { |
| 510 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ |
| 511 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ |
| 512 | case SNDRV_PCM_TRIGGER_START: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 513 | if (cpu_is_at32ap7000()) { |
| 514 | retval = dw_dma_cyclic_start(chip->dma.tx_chan); |
| 515 | if (retval) |
| 516 | goto out; |
| 517 | } else { |
| 518 | ptcr = ATMEL_PDC_TXTEN; |
| 519 | } |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 520 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 521 | break; |
| 522 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ |
| 523 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ |
| 524 | case SNDRV_PCM_TRIGGER_STOP: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 525 | if (cpu_is_at32ap7000()) |
| 526 | dw_dma_cyclic_stop(chip->dma.tx_chan); |
| 527 | else |
| 528 | ptcr |= ATMEL_PDC_TXTDIS; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 529 | if (chip->opened <= 1) |
| 530 | camr &= ~AC97C_CMR_CENA; |
| 531 | break; |
| 532 | default: |
| 533 | retval = -EINVAL; |
| 534 | goto out; |
| 535 | } |
| 536 | |
| 537 | ac97c_writel(chip, CAMR, camr); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 538 | if (!cpu_is_at32ap7000()) |
| 539 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 540 | out: |
| 541 | return retval; |
| 542 | } |
| 543 | |
| 544 | static int |
| 545 | atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
| 546 | { |
| 547 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 548 | unsigned long camr, ptcr = 0; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 549 | int retval = 0; |
| 550 | |
| 551 | camr = ac97c_readl(chip, CAMR); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 552 | ptcr = readl(chip->regs + ATMEL_PDC_PTSR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 553 | |
| 554 | switch (cmd) { |
| 555 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ |
| 556 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ |
| 557 | case SNDRV_PCM_TRIGGER_START: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 558 | if (cpu_is_at32ap7000()) { |
| 559 | retval = dw_dma_cyclic_start(chip->dma.rx_chan); |
| 560 | if (retval) |
| 561 | goto out; |
| 562 | } else { |
| 563 | ptcr = ATMEL_PDC_RXTEN; |
| 564 | } |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 565 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 566 | break; |
| 567 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ |
| 568 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ |
| 569 | case SNDRV_PCM_TRIGGER_STOP: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 570 | if (cpu_is_at32ap7000()) |
| 571 | dw_dma_cyclic_stop(chip->dma.rx_chan); |
| 572 | else |
| 573 | ptcr |= (ATMEL_PDC_RXTDIS); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 574 | if (chip->opened <= 1) |
| 575 | camr &= ~AC97C_CMR_CENA; |
| 576 | break; |
| 577 | default: |
| 578 | retval = -EINVAL; |
| 579 | break; |
| 580 | } |
| 581 | |
| 582 | ac97c_writel(chip, CAMR, camr); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 583 | if (!cpu_is_at32ap7000()) |
| 584 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 585 | out: |
| 586 | return retval; |
| 587 | } |
| 588 | |
| 589 | static snd_pcm_uframes_t |
| 590 | atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream) |
| 591 | { |
| 592 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 593 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 594 | snd_pcm_uframes_t frames; |
| 595 | unsigned long bytes; |
| 596 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 597 | if (cpu_is_at32ap7000()) |
| 598 | bytes = dw_dma_get_src_addr(chip->dma.tx_chan); |
| 599 | else |
| 600 | bytes = readl(chip->regs + ATMEL_PDC_TPR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 601 | bytes -= runtime->dma_addr; |
| 602 | |
| 603 | frames = bytes_to_frames(runtime, bytes); |
| 604 | if (frames >= runtime->buffer_size) |
| 605 | frames -= runtime->buffer_size; |
| 606 | return frames; |
| 607 | } |
| 608 | |
| 609 | static snd_pcm_uframes_t |
| 610 | atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream) |
| 611 | { |
| 612 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 613 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 614 | snd_pcm_uframes_t frames; |
| 615 | unsigned long bytes; |
| 616 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 617 | if (cpu_is_at32ap7000()) |
| 618 | bytes = dw_dma_get_dst_addr(chip->dma.rx_chan); |
| 619 | else |
| 620 | bytes = readl(chip->regs + ATMEL_PDC_RPR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 621 | bytes -= runtime->dma_addr; |
| 622 | |
| 623 | frames = bytes_to_frames(runtime, bytes); |
| 624 | if (frames >= runtime->buffer_size) |
| 625 | frames -= runtime->buffer_size; |
| 626 | return frames; |
| 627 | } |
| 628 | |
| 629 | static struct snd_pcm_ops atmel_ac97_playback_ops = { |
| 630 | .open = atmel_ac97c_playback_open, |
| 631 | .close = atmel_ac97c_playback_close, |
| 632 | .ioctl = snd_pcm_lib_ioctl, |
| 633 | .hw_params = atmel_ac97c_playback_hw_params, |
| 634 | .hw_free = atmel_ac97c_playback_hw_free, |
| 635 | .prepare = atmel_ac97c_playback_prepare, |
| 636 | .trigger = atmel_ac97c_playback_trigger, |
| 637 | .pointer = atmel_ac97c_playback_pointer, |
| 638 | }; |
| 639 | |
| 640 | static struct snd_pcm_ops atmel_ac97_capture_ops = { |
| 641 | .open = atmel_ac97c_capture_open, |
| 642 | .close = atmel_ac97c_capture_close, |
| 643 | .ioctl = snd_pcm_lib_ioctl, |
| 644 | .hw_params = atmel_ac97c_capture_hw_params, |
| 645 | .hw_free = atmel_ac97c_capture_hw_free, |
| 646 | .prepare = atmel_ac97c_capture_prepare, |
| 647 | .trigger = atmel_ac97c_capture_trigger, |
| 648 | .pointer = atmel_ac97c_capture_pointer, |
| 649 | }; |
| 650 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 651 | static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) |
| 652 | { |
| 653 | struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; |
| 654 | irqreturn_t retval = IRQ_NONE; |
| 655 | u32 sr = ac97c_readl(chip, SR); |
| 656 | u32 casr = ac97c_readl(chip, CASR); |
| 657 | u32 cosr = ac97c_readl(chip, COSR); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 658 | u32 camr = ac97c_readl(chip, CAMR); |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 659 | |
| 660 | if (sr & AC97C_SR_CAEVT) { |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 661 | struct snd_pcm_runtime *runtime; |
| 662 | int offset, next_period, block_size; |
Yegor Yefremov | f534116 | 2010-06-08 08:57:13 +0200 | [diff] [blame] | 663 | dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n", |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 664 | casr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
| 665 | casr & AC97C_CSR_RXRDY ? " RXRDY" : "", |
| 666 | casr & AC97C_CSR_UNRUN ? " UNRUN" : "", |
| 667 | casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", |
| 668 | casr & AC97C_CSR_TXRDY ? " TXRDY" : "", |
| 669 | !casr ? " NONE" : ""); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 670 | if (!cpu_is_at32ap7000()) { |
| 671 | if ((casr & camr) & AC97C_CSR_ENDTX) { |
| 672 | runtime = chip->playback_substream->runtime; |
| 673 | block_size = frames_to_bytes(runtime, |
| 674 | runtime->period_size); |
| 675 | chip->playback_period++; |
| 676 | |
| 677 | if (chip->playback_period == runtime->periods) |
| 678 | chip->playback_period = 0; |
| 679 | next_period = chip->playback_period + 1; |
| 680 | if (next_period == runtime->periods) |
| 681 | next_period = 0; |
| 682 | |
| 683 | offset = block_size * next_period; |
| 684 | |
| 685 | writel(runtime->dma_addr + offset, |
| 686 | chip->regs + ATMEL_PDC_TNPR); |
| 687 | writel(block_size / 2, |
| 688 | chip->regs + ATMEL_PDC_TNCR); |
| 689 | |
| 690 | snd_pcm_period_elapsed( |
| 691 | chip->playback_substream); |
| 692 | } |
| 693 | if ((casr & camr) & AC97C_CSR_ENDRX) { |
| 694 | runtime = chip->capture_substream->runtime; |
| 695 | block_size = frames_to_bytes(runtime, |
| 696 | runtime->period_size); |
| 697 | chip->capture_period++; |
| 698 | |
| 699 | if (chip->capture_period == runtime->periods) |
| 700 | chip->capture_period = 0; |
| 701 | next_period = chip->capture_period + 1; |
| 702 | if (next_period == runtime->periods) |
| 703 | next_period = 0; |
| 704 | |
| 705 | offset = block_size * next_period; |
| 706 | |
| 707 | writel(runtime->dma_addr + offset, |
| 708 | chip->regs + ATMEL_PDC_RNPR); |
| 709 | writel(block_size / 2, |
| 710 | chip->regs + ATMEL_PDC_RNCR); |
| 711 | snd_pcm_period_elapsed(chip->capture_substream); |
| 712 | } |
| 713 | } |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 714 | retval = IRQ_HANDLED; |
| 715 | } |
| 716 | |
| 717 | if (sr & AC97C_SR_COEVT) { |
| 718 | dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", |
| 719 | cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
| 720 | cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", |
| 721 | cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", |
| 722 | cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", |
| 723 | !cosr ? " NONE" : ""); |
| 724 | retval = IRQ_HANDLED; |
| 725 | } |
| 726 | |
| 727 | if (retval == IRQ_NONE) { |
| 728 | dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " |
| 729 | "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); |
| 730 | } |
| 731 | |
| 732 | return retval; |
| 733 | } |
| 734 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 735 | static struct ac97_pcm at91_ac97_pcm_defs[] __devinitdata = { |
| 736 | /* Playback */ |
| 737 | { |
| 738 | .exclusive = 1, |
| 739 | .r = { { |
| 740 | .slots = ((1 << AC97_SLOT_PCM_LEFT) |
| 741 | | (1 << AC97_SLOT_PCM_RIGHT)), |
| 742 | } }, |
| 743 | }, |
| 744 | /* PCM in */ |
| 745 | { |
| 746 | .stream = 1, |
| 747 | .exclusive = 1, |
| 748 | .r = { { |
| 749 | .slots = ((1 << AC97_SLOT_PCM_LEFT) |
| 750 | | (1 << AC97_SLOT_PCM_RIGHT)), |
| 751 | } } |
| 752 | }, |
| 753 | /* Mic in */ |
| 754 | { |
| 755 | .stream = 1, |
| 756 | .exclusive = 1, |
| 757 | .r = { { |
| 758 | .slots = (1<<AC97_SLOT_MIC), |
| 759 | } } |
| 760 | }, |
| 761 | }; |
| 762 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 763 | static int __devinit atmel_ac97c_pcm_new(struct atmel_ac97c *chip) |
| 764 | { |
| 765 | struct snd_pcm *pcm; |
| 766 | struct snd_pcm_hardware hw = atmel_ac97c_hw; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 767 | int capture, playback, retval, err; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 768 | |
| 769 | capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 770 | playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 771 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 772 | if (!cpu_is_at32ap7000()) { |
| 773 | err = snd_ac97_pcm_assign(chip->ac97_bus, |
| 774 | ARRAY_SIZE(at91_ac97_pcm_defs), |
| 775 | at91_ac97_pcm_defs); |
| 776 | if (err) |
| 777 | return err; |
| 778 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 779 | retval = snd_pcm_new(chip->card, chip->card->shortname, |
| 780 | chip->pdev->id, playback, capture, &pcm); |
| 781 | if (retval) |
| 782 | return retval; |
| 783 | |
| 784 | if (capture) |
| 785 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
| 786 | &atmel_ac97_capture_ops); |
| 787 | if (playback) |
| 788 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
| 789 | &atmel_ac97_playback_ops); |
| 790 | |
| 791 | retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, |
| 792 | &chip->pdev->dev, hw.periods_min * hw.period_bytes_min, |
| 793 | hw.buffer_bytes_max); |
| 794 | if (retval) |
| 795 | return retval; |
| 796 | |
| 797 | pcm->private_data = chip; |
| 798 | pcm->info_flags = 0; |
| 799 | strcpy(pcm->name, chip->card->shortname); |
| 800 | chip->pcm = pcm; |
| 801 | |
| 802 | return 0; |
| 803 | } |
| 804 | |
| 805 | static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip) |
| 806 | { |
| 807 | struct snd_ac97_template template; |
| 808 | memset(&template, 0, sizeof(template)); |
| 809 | template.private_data = chip; |
| 810 | return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97); |
| 811 | } |
| 812 | |
| 813 | static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg, |
| 814 | unsigned short val) |
| 815 | { |
| 816 | struct atmel_ac97c *chip = get_chip(ac97); |
| 817 | unsigned long word; |
| 818 | int timeout = 40; |
| 819 | |
| 820 | word = (reg & 0x7f) << 16 | val; |
| 821 | |
| 822 | do { |
| 823 | if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) { |
| 824 | ac97c_writel(chip, COTHR, word); |
| 825 | return; |
| 826 | } |
| 827 | udelay(1); |
| 828 | } while (--timeout); |
| 829 | |
| 830 | dev_dbg(&chip->pdev->dev, "codec write timeout\n"); |
| 831 | } |
| 832 | |
| 833 | static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97, |
| 834 | unsigned short reg) |
| 835 | { |
| 836 | struct atmel_ac97c *chip = get_chip(ac97); |
| 837 | unsigned long word; |
| 838 | int timeout = 40; |
| 839 | int write = 10; |
| 840 | |
| 841 | word = (0x80 | (reg & 0x7f)) << 16; |
| 842 | |
| 843 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) |
| 844 | ac97c_readl(chip, CORHR); |
| 845 | |
| 846 | retry_write: |
| 847 | timeout = 40; |
| 848 | |
| 849 | do { |
| 850 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) { |
| 851 | ac97c_writel(chip, COTHR, word); |
| 852 | goto read_reg; |
| 853 | } |
| 854 | udelay(10); |
| 855 | } while (--timeout); |
| 856 | |
| 857 | if (!--write) |
| 858 | goto timed_out; |
| 859 | goto retry_write; |
| 860 | |
| 861 | read_reg: |
| 862 | do { |
| 863 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) { |
| 864 | unsigned short val = ac97c_readl(chip, CORHR); |
| 865 | return val; |
| 866 | } |
| 867 | udelay(10); |
| 868 | } while (--timeout); |
| 869 | |
| 870 | if (!--write) |
| 871 | goto timed_out; |
| 872 | goto retry_write; |
| 873 | |
| 874 | timed_out: |
| 875 | dev_dbg(&chip->pdev->dev, "codec read timeout\n"); |
| 876 | return 0xffff; |
| 877 | } |
| 878 | |
| 879 | static bool filter(struct dma_chan *chan, void *slave) |
| 880 | { |
| 881 | struct dw_dma_slave *dws = slave; |
| 882 | |
| 883 | if (dws->dma_dev == chan->device->dev) { |
| 884 | chan->private = dws; |
| 885 | return true; |
| 886 | } else |
| 887 | return false; |
| 888 | } |
| 889 | |
| 890 | static void atmel_ac97c_reset(struct atmel_ac97c *chip) |
| 891 | { |
Hans-Christian Egtvedt | 81baf3a | 2009-04-02 08:21:15 +0200 | [diff] [blame] | 892 | ac97c_writel(chip, MR, 0); |
| 893 | ac97c_writel(chip, MR, AC97C_MR_ENA); |
| 894 | ac97c_writel(chip, CAMR, 0); |
| 895 | ac97c_writel(chip, COMR, 0); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 896 | |
| 897 | if (gpio_is_valid(chip->reset_pin)) { |
| 898 | gpio_set_value(chip->reset_pin, 0); |
| 899 | /* AC97 v2.2 specifications says minimum 1 us. */ |
Hans-Christian Egtvedt | 81baf3a | 2009-04-02 08:21:15 +0200 | [diff] [blame] | 900 | udelay(2); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 901 | gpio_set_value(chip->reset_pin, 1); |
Bo Shen | 8015e3d | 2011-12-19 17:57:52 +0800 | [diff] [blame] | 902 | } else { |
| 903 | ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); |
| 904 | udelay(2); |
| 905 | ac97c_writel(chip, MR, AC97C_MR_ENA); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 906 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | static int __devinit atmel_ac97c_probe(struct platform_device *pdev) |
| 910 | { |
| 911 | struct snd_card *card; |
| 912 | struct atmel_ac97c *chip; |
| 913 | struct resource *regs; |
| 914 | struct ac97c_platform_data *pdata; |
| 915 | struct clk *pclk; |
| 916 | static struct snd_ac97_bus_ops ops = { |
| 917 | .write = atmel_ac97c_write, |
| 918 | .read = atmel_ac97c_read, |
| 919 | }; |
| 920 | int retval; |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 921 | int irq; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 922 | |
| 923 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 924 | if (!regs) { |
| 925 | dev_dbg(&pdev->dev, "no memory resource\n"); |
| 926 | return -ENXIO; |
| 927 | } |
| 928 | |
| 929 | pdata = pdev->dev.platform_data; |
| 930 | if (!pdata) { |
| 931 | dev_dbg(&pdev->dev, "no platform data\n"); |
| 932 | return -ENXIO; |
| 933 | } |
| 934 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 935 | irq = platform_get_irq(pdev, 0); |
| 936 | if (irq < 0) { |
| 937 | dev_dbg(&pdev->dev, "could not get irq\n"); |
| 938 | return -ENXIO; |
| 939 | } |
| 940 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 941 | if (cpu_is_at32ap7000()) { |
| 942 | pclk = clk_get(&pdev->dev, "pclk"); |
| 943 | } else { |
| 944 | pclk = clk_get(&pdev->dev, "ac97_clk"); |
| 945 | } |
| 946 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 947 | if (IS_ERR(pclk)) { |
| 948 | dev_dbg(&pdev->dev, "no peripheral clock\n"); |
| 949 | return PTR_ERR(pclk); |
| 950 | } |
| 951 | clk_enable(pclk); |
| 952 | |
| 953 | retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, |
| 954 | THIS_MODULE, sizeof(struct atmel_ac97c), &card); |
| 955 | if (retval) { |
| 956 | dev_dbg(&pdev->dev, "could not create sound card device\n"); |
| 957 | goto err_snd_card_new; |
| 958 | } |
| 959 | |
| 960 | chip = get_chip(card); |
| 961 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 962 | retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); |
| 963 | if (retval) { |
| 964 | dev_dbg(&pdev->dev, "unable to request irq %d\n", irq); |
| 965 | goto err_request_irq; |
| 966 | } |
| 967 | chip->irq = irq; |
| 968 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 969 | spin_lock_init(&chip->lock); |
| 970 | |
| 971 | strcpy(card->driver, "Atmel AC97C"); |
| 972 | strcpy(card->shortname, "Atmel AC97C"); |
| 973 | sprintf(card->longname, "Atmel AC97 controller"); |
| 974 | |
| 975 | chip->card = card; |
| 976 | chip->pclk = pclk; |
| 977 | chip->pdev = pdev; |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 978 | chip->regs = ioremap(regs->start, resource_size(regs)); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 979 | |
| 980 | if (!chip->regs) { |
| 981 | dev_dbg(&pdev->dev, "could not remap register memory\n"); |
| 982 | goto err_ioremap; |
| 983 | } |
| 984 | |
| 985 | if (gpio_is_valid(pdata->reset_pin)) { |
| 986 | if (gpio_request(pdata->reset_pin, "reset_pin")) { |
| 987 | dev_dbg(&pdev->dev, "reset pin not available\n"); |
| 988 | chip->reset_pin = -ENODEV; |
| 989 | } else { |
| 990 | gpio_direction_output(pdata->reset_pin, 1); |
| 991 | chip->reset_pin = pdata->reset_pin; |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | snd_card_set_dev(card, &pdev->dev); |
| 996 | |
Hans-Christian Egtvedt | 81baf3a | 2009-04-02 08:21:15 +0200 | [diff] [blame] | 997 | atmel_ac97c_reset(chip); |
| 998 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 999 | /* Enable overrun interrupt from codec channel */ |
| 1000 | ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); |
| 1001 | ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); |
| 1002 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1003 | retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); |
| 1004 | if (retval) { |
| 1005 | dev_dbg(&pdev->dev, "could not register on ac97 bus\n"); |
| 1006 | goto err_ac97_bus; |
| 1007 | } |
| 1008 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1009 | retval = atmel_ac97c_mixer_new(chip); |
| 1010 | if (retval) { |
| 1011 | dev_dbg(&pdev->dev, "could not register ac97 mixer\n"); |
| 1012 | goto err_ac97_bus; |
| 1013 | } |
| 1014 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1015 | if (cpu_is_at32ap7000()) { |
| 1016 | if (pdata->rx_dws.dma_dev) { |
| 1017 | struct dw_dma_slave *dws = &pdata->rx_dws; |
| 1018 | dma_cap_mask_t mask; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1019 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1020 | dws->rx_reg = regs->start + AC97C_CARHR + 2; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1021 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1022 | dma_cap_zero(mask); |
| 1023 | dma_cap_set(DMA_SLAVE, mask); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1024 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1025 | chip->dma.rx_chan = dma_request_channel(mask, filter, |
| 1026 | dws); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1027 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1028 | dev_info(&chip->pdev->dev, "using %s for DMA RX\n", |
Hans-Christian Egtvedt | 2357285 | 2009-04-02 08:21:17 +0200 | [diff] [blame] | 1029 | dev_name(&chip->dma.rx_chan->dev->device)); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1030 | set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1031 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1032 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1033 | if (pdata->tx_dws.dma_dev) { |
| 1034 | struct dw_dma_slave *dws = &pdata->tx_dws; |
| 1035 | dma_cap_mask_t mask; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1036 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1037 | dws->tx_reg = regs->start + AC97C_CATHR + 2; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1038 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1039 | dma_cap_zero(mask); |
| 1040 | dma_cap_set(DMA_SLAVE, mask); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1041 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1042 | chip->dma.tx_chan = dma_request_channel(mask, filter, |
| 1043 | dws); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1044 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1045 | dev_info(&chip->pdev->dev, "using %s for DMA TX\n", |
Hans-Christian Egtvedt | 2357285 | 2009-04-02 08:21:17 +0200 | [diff] [blame] | 1046 | dev_name(&chip->dma.tx_chan->dev->device)); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1047 | set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 1048 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1049 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1050 | if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) && |
| 1051 | !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) { |
| 1052 | dev_dbg(&pdev->dev, "DMA not available\n"); |
| 1053 | retval = -ENODEV; |
| 1054 | goto err_dma; |
| 1055 | } |
| 1056 | } else { |
| 1057 | /* Just pretend that we have DMA channel(for at91 i is actually |
| 1058 | * the PDC) */ |
| 1059 | set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1060 | set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1061 | } |
| 1062 | |
| 1063 | retval = atmel_ac97c_pcm_new(chip); |
| 1064 | if (retval) { |
| 1065 | dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); |
| 1066 | goto err_dma; |
| 1067 | } |
| 1068 | |
| 1069 | retval = snd_card_register(card); |
| 1070 | if (retval) { |
| 1071 | dev_dbg(&pdev->dev, "could not register sound card\n"); |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 1072 | goto err_dma; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1073 | } |
| 1074 | |
| 1075 | platform_set_drvdata(pdev, card); |
| 1076 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1077 | dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", |
| 1078 | chip->regs, irq); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1079 | |
| 1080 | return 0; |
| 1081 | |
| 1082 | err_dma: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1083 | if (cpu_is_at32ap7000()) { |
| 1084 | if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) |
| 1085 | dma_release_channel(chip->dma.rx_chan); |
| 1086 | if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) |
| 1087 | dma_release_channel(chip->dma.tx_chan); |
| 1088 | clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1089 | clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 1090 | chip->dma.rx_chan = NULL; |
| 1091 | chip->dma.tx_chan = NULL; |
| 1092 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1093 | err_ac97_bus: |
| 1094 | snd_card_set_dev(card, NULL); |
| 1095 | |
| 1096 | if (gpio_is_valid(chip->reset_pin)) |
| 1097 | gpio_free(chip->reset_pin); |
| 1098 | |
| 1099 | iounmap(chip->regs); |
| 1100 | err_ioremap: |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 1101 | free_irq(irq, chip); |
| 1102 | err_request_irq: |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1103 | snd_card_free(card); |
| 1104 | err_snd_card_new: |
| 1105 | clk_disable(pclk); |
| 1106 | clk_put(pclk); |
| 1107 | return retval; |
| 1108 | } |
| 1109 | |
| 1110 | #ifdef CONFIG_PM |
| 1111 | static int atmel_ac97c_suspend(struct platform_device *pdev, pm_message_t msg) |
| 1112 | { |
| 1113 | struct snd_card *card = platform_get_drvdata(pdev); |
| 1114 | struct atmel_ac97c *chip = card->private_data; |
| 1115 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1116 | if (cpu_is_at32ap7000()) { |
| 1117 | if (test_bit(DMA_RX_READY, &chip->flags)) |
| 1118 | dw_dma_cyclic_stop(chip->dma.rx_chan); |
| 1119 | if (test_bit(DMA_TX_READY, &chip->flags)) |
| 1120 | dw_dma_cyclic_stop(chip->dma.tx_chan); |
| 1121 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1122 | clk_disable(chip->pclk); |
| 1123 | |
| 1124 | return 0; |
| 1125 | } |
| 1126 | |
| 1127 | static int atmel_ac97c_resume(struct platform_device *pdev) |
| 1128 | { |
| 1129 | struct snd_card *card = platform_get_drvdata(pdev); |
| 1130 | struct atmel_ac97c *chip = card->private_data; |
| 1131 | |
| 1132 | clk_enable(chip->pclk); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1133 | if (cpu_is_at32ap7000()) { |
| 1134 | if (test_bit(DMA_RX_READY, &chip->flags)) |
| 1135 | dw_dma_cyclic_start(chip->dma.rx_chan); |
| 1136 | if (test_bit(DMA_TX_READY, &chip->flags)) |
| 1137 | dw_dma_cyclic_start(chip->dma.tx_chan); |
| 1138 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1139 | return 0; |
| 1140 | } |
| 1141 | #else |
| 1142 | #define atmel_ac97c_suspend NULL |
| 1143 | #define atmel_ac97c_resume NULL |
| 1144 | #endif |
| 1145 | |
| 1146 | static int __devexit atmel_ac97c_remove(struct platform_device *pdev) |
| 1147 | { |
| 1148 | struct snd_card *card = platform_get_drvdata(pdev); |
| 1149 | struct atmel_ac97c *chip = get_chip(card); |
| 1150 | |
| 1151 | if (gpio_is_valid(chip->reset_pin)) |
| 1152 | gpio_free(chip->reset_pin); |
| 1153 | |
Hans-Christian Egtvedt | bd74a18 | 2009-04-02 08:21:16 +0200 | [diff] [blame] | 1154 | ac97c_writel(chip, CAMR, 0); |
| 1155 | ac97c_writel(chip, COMR, 0); |
| 1156 | ac97c_writel(chip, MR, 0); |
| 1157 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1158 | clk_disable(chip->pclk); |
| 1159 | clk_put(chip->pclk); |
| 1160 | iounmap(chip->regs); |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 1161 | free_irq(chip->irq, chip); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1162 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1163 | if (cpu_is_at32ap7000()) { |
| 1164 | if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) |
| 1165 | dma_release_channel(chip->dma.rx_chan); |
| 1166 | if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) |
| 1167 | dma_release_channel(chip->dma.tx_chan); |
| 1168 | clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1169 | clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 1170 | chip->dma.rx_chan = NULL; |
| 1171 | chip->dma.tx_chan = NULL; |
| 1172 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1173 | |
| 1174 | snd_card_set_dev(card, NULL); |
| 1175 | snd_card_free(card); |
| 1176 | |
| 1177 | platform_set_drvdata(pdev, NULL); |
| 1178 | |
| 1179 | return 0; |
| 1180 | } |
| 1181 | |
| 1182 | static struct platform_driver atmel_ac97c_driver = { |
| 1183 | .remove = __devexit_p(atmel_ac97c_remove), |
| 1184 | .driver = { |
| 1185 | .name = "atmel_ac97c", |
| 1186 | }, |
| 1187 | .suspend = atmel_ac97c_suspend, |
| 1188 | .resume = atmel_ac97c_resume, |
| 1189 | }; |
| 1190 | |
| 1191 | static int __init atmel_ac97c_init(void) |
| 1192 | { |
| 1193 | return platform_driver_probe(&atmel_ac97c_driver, |
| 1194 | atmel_ac97c_probe); |
| 1195 | } |
| 1196 | module_init(atmel_ac97c_init); |
| 1197 | |
| 1198 | static void __exit atmel_ac97c_exit(void) |
| 1199 | { |
| 1200 | platform_driver_unregister(&atmel_ac97c_driver); |
| 1201 | } |
| 1202 | module_exit(atmel_ac97c_exit); |
| 1203 | |
| 1204 | MODULE_LICENSE("GPL"); |
| 1205 | MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); |
Hans-Christian Egtvedt | 0cfae7c | 2011-06-28 16:59:14 +0200 | [diff] [blame] | 1206 | MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |