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> |
Viresh Kumar | e2b35f3 | 2012-02-01 16:12:27 +0530 | [diff] [blame] | 23 | #include <linux/types.h> |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 24 | #include <linux/io.h> |
| 25 | |
| 26 | #include <sound/core.h> |
| 27 | #include <sound/initval.h> |
| 28 | #include <sound/pcm.h> |
| 29 | #include <sound/pcm_params.h> |
| 30 | #include <sound/ac97_codec.h> |
| 31 | #include <sound/atmel-ac97c.h> |
| 32 | #include <sound/memalloc.h> |
| 33 | |
| 34 | #include <linux/dw_dmac.h> |
| 35 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 36 | #include <mach/cpu.h> |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 37 | #include <mach/gpio.h> |
| 38 | |
Hans-Christian Egtvedt | fd76804 | 2011-01-24 16:09:56 +0100 | [diff] [blame] | 39 | #ifdef CONFIG_ARCH_AT91 |
| 40 | #include <mach/hardware.h> |
| 41 | #endif |
| 42 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 43 | #include "ac97c.h" |
| 44 | |
| 45 | enum { |
| 46 | DMA_TX_READY = 0, |
| 47 | DMA_RX_READY, |
| 48 | DMA_TX_CHAN_PRESENT, |
| 49 | DMA_RX_CHAN_PRESENT, |
| 50 | }; |
| 51 | |
| 52 | /* Serialize access to opened variable */ |
| 53 | static DEFINE_MUTEX(opened_mutex); |
| 54 | |
| 55 | struct atmel_ac97c_dma { |
| 56 | struct dma_chan *rx_chan; |
| 57 | struct dma_chan *tx_chan; |
| 58 | }; |
| 59 | |
| 60 | struct atmel_ac97c { |
| 61 | struct clk *pclk; |
| 62 | struct platform_device *pdev; |
| 63 | struct atmel_ac97c_dma dma; |
| 64 | |
| 65 | struct snd_pcm_substream *playback_substream; |
| 66 | struct snd_pcm_substream *capture_substream; |
| 67 | struct snd_card *card; |
| 68 | struct snd_pcm *pcm; |
| 69 | struct snd_ac97 *ac97; |
| 70 | struct snd_ac97_bus *ac97_bus; |
| 71 | |
| 72 | u64 cur_format; |
| 73 | unsigned int cur_rate; |
| 74 | unsigned long flags; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 75 | int playback_period, capture_period; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 76 | /* Serialize access to opened variable */ |
| 77 | spinlock_t lock; |
| 78 | void __iomem *regs; |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 79 | int irq; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 80 | int opened; |
| 81 | int reset_pin; |
| 82 | }; |
| 83 | |
| 84 | #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data) |
| 85 | |
| 86 | #define ac97c_writel(chip, reg, val) \ |
| 87 | __raw_writel((val), (chip)->regs + AC97C_##reg) |
| 88 | #define ac97c_readl(chip, reg) \ |
| 89 | __raw_readl((chip)->regs + AC97C_##reg) |
| 90 | |
| 91 | /* This function is called by the DMA driver. */ |
| 92 | static void atmel_ac97c_dma_playback_period_done(void *arg) |
| 93 | { |
| 94 | struct atmel_ac97c *chip = arg; |
| 95 | snd_pcm_period_elapsed(chip->playback_substream); |
| 96 | } |
| 97 | |
| 98 | static void atmel_ac97c_dma_capture_period_done(void *arg) |
| 99 | { |
| 100 | struct atmel_ac97c *chip = arg; |
| 101 | snd_pcm_period_elapsed(chip->capture_substream); |
| 102 | } |
| 103 | |
| 104 | static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip, |
| 105 | struct snd_pcm_substream *substream, |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 106 | enum dma_transfer_direction direction) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 107 | { |
| 108 | struct dma_chan *chan; |
| 109 | struct dw_cyclic_desc *cdesc; |
| 110 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 111 | unsigned long buffer_len, period_len; |
| 112 | |
| 113 | /* |
| 114 | * We don't do DMA on "complex" transfers, i.e. with |
| 115 | * non-halfword-aligned buffers or lengths. |
| 116 | */ |
| 117 | if (runtime->dma_addr & 1 || runtime->buffer_size & 1) { |
| 118 | dev_dbg(&chip->pdev->dev, "too complex transfer\n"); |
| 119 | return -EINVAL; |
| 120 | } |
| 121 | |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 122 | if (direction == DMA_MEM_TO_DEV) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 123 | chan = chip->dma.tx_chan; |
| 124 | else |
| 125 | chan = chip->dma.rx_chan; |
| 126 | |
| 127 | buffer_len = frames_to_bytes(runtime, runtime->buffer_size); |
| 128 | period_len = frames_to_bytes(runtime, runtime->period_size); |
| 129 | |
| 130 | cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len, |
| 131 | period_len, direction); |
| 132 | if (IS_ERR(cdesc)) { |
| 133 | dev_dbg(&chip->pdev->dev, "could not prepare cyclic DMA\n"); |
| 134 | return PTR_ERR(cdesc); |
| 135 | } |
| 136 | |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 137 | if (direction == DMA_MEM_TO_DEV) { |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 138 | cdesc->period_callback = atmel_ac97c_dma_playback_period_done; |
| 139 | set_bit(DMA_TX_READY, &chip->flags); |
| 140 | } else { |
| 141 | cdesc->period_callback = atmel_ac97c_dma_capture_period_done; |
| 142 | set_bit(DMA_RX_READY, &chip->flags); |
| 143 | } |
| 144 | |
| 145 | cdesc->period_callback_param = chip; |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | static struct snd_pcm_hardware atmel_ac97c_hw = { |
| 151 | .info = (SNDRV_PCM_INFO_MMAP |
| 152 | | SNDRV_PCM_INFO_MMAP_VALID |
| 153 | | SNDRV_PCM_INFO_INTERLEAVED |
| 154 | | SNDRV_PCM_INFO_BLOCK_TRANSFER |
| 155 | | SNDRV_PCM_INFO_JOINT_DUPLEX |
| 156 | | SNDRV_PCM_INFO_RESUME |
| 157 | | SNDRV_PCM_INFO_PAUSE), |
| 158 | .formats = (SNDRV_PCM_FMTBIT_S16_BE |
| 159 | | SNDRV_PCM_FMTBIT_S16_LE), |
| 160 | .rates = (SNDRV_PCM_RATE_CONTINUOUS), |
| 161 | .rate_min = 4000, |
| 162 | .rate_max = 48000, |
| 163 | .channels_min = 1, |
| 164 | .channels_max = 2, |
Hans-Christian Egtvedt | c42eec0 | 2009-04-02 08:21:13 +0200 | [diff] [blame] | 165 | .buffer_bytes_max = 2 * 2 * 64 * 2048, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 166 | .period_bytes_min = 4096, |
| 167 | .period_bytes_max = 4096, |
Hans-Christian Egtvedt | c42eec0 | 2009-04-02 08:21:13 +0200 | [diff] [blame] | 168 | .periods_min = 6, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 169 | .periods_max = 64, |
| 170 | }; |
| 171 | |
| 172 | static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream) |
| 173 | { |
| 174 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 175 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 176 | |
| 177 | mutex_lock(&opened_mutex); |
| 178 | chip->opened++; |
| 179 | runtime->hw = atmel_ac97c_hw; |
| 180 | if (chip->cur_rate) { |
| 181 | runtime->hw.rate_min = chip->cur_rate; |
| 182 | runtime->hw.rate_max = chip->cur_rate; |
| 183 | } |
| 184 | if (chip->cur_format) |
| 185 | runtime->hw.formats = (1ULL << chip->cur_format); |
| 186 | mutex_unlock(&opened_mutex); |
| 187 | chip->playback_substream = substream; |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream) |
| 192 | { |
| 193 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 194 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 195 | |
| 196 | mutex_lock(&opened_mutex); |
| 197 | chip->opened++; |
| 198 | runtime->hw = atmel_ac97c_hw; |
| 199 | if (chip->cur_rate) { |
| 200 | runtime->hw.rate_min = chip->cur_rate; |
| 201 | runtime->hw.rate_max = chip->cur_rate; |
| 202 | } |
| 203 | if (chip->cur_format) |
| 204 | runtime->hw.formats = (1ULL << chip->cur_format); |
| 205 | mutex_unlock(&opened_mutex); |
| 206 | chip->capture_substream = substream; |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream) |
| 211 | { |
| 212 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 213 | |
| 214 | mutex_lock(&opened_mutex); |
| 215 | chip->opened--; |
| 216 | if (!chip->opened) { |
| 217 | chip->cur_rate = 0; |
| 218 | chip->cur_format = 0; |
| 219 | } |
| 220 | mutex_unlock(&opened_mutex); |
| 221 | |
| 222 | chip->playback_substream = NULL; |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream) |
| 228 | { |
| 229 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 230 | |
| 231 | mutex_lock(&opened_mutex); |
| 232 | chip->opened--; |
| 233 | if (!chip->opened) { |
| 234 | chip->cur_rate = 0; |
| 235 | chip->cur_format = 0; |
| 236 | } |
| 237 | mutex_unlock(&opened_mutex); |
| 238 | |
| 239 | chip->capture_substream = NULL; |
| 240 | |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream, |
| 245 | struct snd_pcm_hw_params *hw_params) |
| 246 | { |
| 247 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 248 | int retval; |
| 249 | |
| 250 | retval = snd_pcm_lib_malloc_pages(substream, |
| 251 | params_buffer_bytes(hw_params)); |
| 252 | if (retval < 0) |
| 253 | return retval; |
| 254 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 255 | if (cpu_is_at32ap7000()) { |
| 256 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
| 257 | if (retval == 1) |
| 258 | if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) |
| 259 | dw_dma_cyclic_free(chip->dma.tx_chan); |
| 260 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 261 | /* Set restrictions to params. */ |
| 262 | mutex_lock(&opened_mutex); |
| 263 | chip->cur_rate = params_rate(hw_params); |
| 264 | chip->cur_format = params_format(hw_params); |
| 265 | mutex_unlock(&opened_mutex); |
| 266 | |
| 267 | return retval; |
| 268 | } |
| 269 | |
| 270 | static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream, |
| 271 | struct snd_pcm_hw_params *hw_params) |
| 272 | { |
| 273 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 274 | int retval; |
| 275 | |
| 276 | retval = snd_pcm_lib_malloc_pages(substream, |
| 277 | params_buffer_bytes(hw_params)); |
| 278 | if (retval < 0) |
| 279 | return retval; |
| 280 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ |
Julia Lawall | 0c23e46 | 2012-08-19 09:02:57 +0200 | [diff] [blame] | 281 | if (cpu_is_at32ap7000() && retval == 1) |
| 282 | if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) |
| 283 | dw_dma_cyclic_free(chip->dma.rx_chan); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 284 | |
| 285 | /* Set restrictions to params. */ |
| 286 | mutex_lock(&opened_mutex); |
| 287 | chip->cur_rate = params_rate(hw_params); |
| 288 | chip->cur_format = params_format(hw_params); |
| 289 | mutex_unlock(&opened_mutex); |
| 290 | |
| 291 | return retval; |
| 292 | } |
| 293 | |
| 294 | static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream) |
| 295 | { |
| 296 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 297 | if (cpu_is_at32ap7000()) { |
| 298 | if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) |
| 299 | dw_dma_cyclic_free(chip->dma.tx_chan); |
| 300 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 301 | return snd_pcm_lib_free_pages(substream); |
| 302 | } |
| 303 | |
| 304 | static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream) |
| 305 | { |
| 306 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 307 | if (cpu_is_at32ap7000()) { |
| 308 | if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) |
| 309 | dw_dma_cyclic_free(chip->dma.rx_chan); |
| 310 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 311 | return snd_pcm_lib_free_pages(substream); |
| 312 | } |
| 313 | |
| 314 | static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream) |
| 315 | { |
| 316 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 317 | struct snd_pcm_runtime *runtime = substream->runtime; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 318 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 319 | unsigned long word = ac97c_readl(chip, OCA); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 320 | int retval; |
| 321 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 322 | chip->playback_period = 0; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 323 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 324 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 325 | /* assign channels to AC97C channel A */ |
| 326 | switch (runtime->channels) { |
| 327 | case 1: |
| 328 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); |
| 329 | break; |
| 330 | case 2: |
| 331 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) |
| 332 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); |
| 333 | break; |
| 334 | default: |
| 335 | /* TODO: support more than two channels */ |
| 336 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 337 | } |
| 338 | ac97c_writel(chip, OCA, word); |
| 339 | |
| 340 | /* configure sample format and size */ |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 341 | word = ac97c_readl(chip, CAMR); |
| 342 | if (chip->opened <= 1) |
| 343 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
| 344 | else |
| 345 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 346 | |
| 347 | switch (runtime->format) { |
| 348 | case SNDRV_PCM_FORMAT_S16_LE: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 349 | if (cpu_is_at32ap7000()) |
| 350 | word |= AC97C_CMR_CEM_LITTLE; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 351 | break; |
| 352 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 353 | word &= ~(AC97C_CMR_CEM_LITTLE); |
| 354 | break; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 355 | default: |
| 356 | word = ac97c_readl(chip, OCA); |
| 357 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 358 | ac97c_writel(chip, OCA, word); |
| 359 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 360 | } |
| 361 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 362 | /* Enable underrun interrupt on channel A */ |
| 363 | word |= AC97C_CSR_UNRUN; |
| 364 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 365 | ac97c_writel(chip, CAMR, word); |
| 366 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 367 | /* Enable channel A event interrupt */ |
| 368 | word = ac97c_readl(chip, IMR); |
| 369 | word |= AC97C_SR_CAEVT; |
| 370 | ac97c_writel(chip, IER, word); |
| 371 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 372 | /* set variable rate if needed */ |
| 373 | if (runtime->rate != 48000) { |
| 374 | word = ac97c_readl(chip, MR); |
| 375 | word |= AC97C_MR_VRA; |
| 376 | ac97c_writel(chip, MR, word); |
| 377 | } else { |
| 378 | word = ac97c_readl(chip, MR); |
| 379 | word &= ~(AC97C_MR_VRA); |
| 380 | ac97c_writel(chip, MR, word); |
| 381 | } |
| 382 | |
| 383 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, |
| 384 | runtime->rate); |
| 385 | if (retval) |
| 386 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", |
| 387 | runtime->rate); |
| 388 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 389 | if (cpu_is_at32ap7000()) { |
| 390 | if (!test_bit(DMA_TX_READY, &chip->flags)) |
| 391 | retval = atmel_ac97c_prepare_dma(chip, substream, |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 392 | DMA_MEM_TO_DEV); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 393 | } else { |
| 394 | /* Initialize and start the PDC */ |
| 395 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR); |
| 396 | writel(block_size / 2, chip->regs + ATMEL_PDC_TCR); |
| 397 | writel(runtime->dma_addr + block_size, |
| 398 | chip->regs + ATMEL_PDC_TNPR); |
| 399 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); |
| 400 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 401 | |
| 402 | return retval; |
| 403 | } |
| 404 | |
| 405 | static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) |
| 406 | { |
| 407 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 408 | struct snd_pcm_runtime *runtime = substream->runtime; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 409 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 410 | unsigned long word = ac97c_readl(chip, ICA); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 411 | int retval; |
| 412 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 413 | chip->capture_period = 0; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 414 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 415 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 416 | /* assign channels to AC97C channel A */ |
| 417 | switch (runtime->channels) { |
| 418 | case 1: |
| 419 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); |
| 420 | break; |
| 421 | case 2: |
| 422 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) |
| 423 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); |
| 424 | break; |
| 425 | default: |
| 426 | /* TODO: support more than two channels */ |
| 427 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 428 | } |
| 429 | ac97c_writel(chip, ICA, word); |
| 430 | |
| 431 | /* configure sample format and size */ |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 432 | word = ac97c_readl(chip, CAMR); |
| 433 | if (chip->opened <= 1) |
| 434 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
| 435 | else |
| 436 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 437 | |
| 438 | switch (runtime->format) { |
| 439 | case SNDRV_PCM_FORMAT_S16_LE: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 440 | if (cpu_is_at32ap7000()) |
| 441 | word |= AC97C_CMR_CEM_LITTLE; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 442 | break; |
| 443 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 444 | word &= ~(AC97C_CMR_CEM_LITTLE); |
| 445 | break; |
Hans-Christian Egtvedt | 128ed6a | 2009-04-02 08:21:12 +0200 | [diff] [blame] | 446 | default: |
| 447 | word = ac97c_readl(chip, ICA); |
| 448 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
| 449 | ac97c_writel(chip, ICA, word); |
| 450 | return -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 451 | } |
| 452 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 453 | /* Enable overrun interrupt on channel A */ |
| 454 | word |= AC97C_CSR_OVRUN; |
| 455 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 456 | ac97c_writel(chip, CAMR, word); |
| 457 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 458 | /* Enable channel A event interrupt */ |
| 459 | word = ac97c_readl(chip, IMR); |
| 460 | word |= AC97C_SR_CAEVT; |
| 461 | ac97c_writel(chip, IER, word); |
| 462 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 463 | /* set variable rate if needed */ |
| 464 | if (runtime->rate != 48000) { |
| 465 | word = ac97c_readl(chip, MR); |
| 466 | word |= AC97C_MR_VRA; |
| 467 | ac97c_writel(chip, MR, word); |
| 468 | } else { |
| 469 | word = ac97c_readl(chip, MR); |
| 470 | word &= ~(AC97C_MR_VRA); |
| 471 | ac97c_writel(chip, MR, word); |
| 472 | } |
| 473 | |
| 474 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, |
| 475 | runtime->rate); |
| 476 | if (retval) |
| 477 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", |
| 478 | runtime->rate); |
| 479 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 480 | if (cpu_is_at32ap7000()) { |
| 481 | if (!test_bit(DMA_RX_READY, &chip->flags)) |
| 482 | retval = atmel_ac97c_prepare_dma(chip, substream, |
Vinod Koul | 35e1658 | 2011-10-14 10:49:30 +0530 | [diff] [blame] | 483 | DMA_DEV_TO_MEM); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 484 | } else { |
| 485 | /* Initialize and start the PDC */ |
| 486 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR); |
| 487 | writel(block_size / 2, chip->regs + ATMEL_PDC_RCR); |
| 488 | writel(runtime->dma_addr + block_size, |
| 489 | chip->regs + ATMEL_PDC_RNPR); |
| 490 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); |
| 491 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 492 | |
| 493 | return retval; |
| 494 | } |
| 495 | |
| 496 | static int |
| 497 | atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
| 498 | { |
| 499 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 500 | unsigned long camr, ptcr = 0; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 501 | int retval = 0; |
| 502 | |
| 503 | camr = ac97c_readl(chip, CAMR); |
| 504 | |
| 505 | switch (cmd) { |
| 506 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ |
| 507 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ |
| 508 | case SNDRV_PCM_TRIGGER_START: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 509 | if (cpu_is_at32ap7000()) { |
| 510 | retval = dw_dma_cyclic_start(chip->dma.tx_chan); |
| 511 | if (retval) |
| 512 | goto out; |
| 513 | } else { |
| 514 | ptcr = ATMEL_PDC_TXTEN; |
| 515 | } |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 516 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 517 | break; |
| 518 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ |
| 519 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ |
| 520 | case SNDRV_PCM_TRIGGER_STOP: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 521 | if (cpu_is_at32ap7000()) |
| 522 | dw_dma_cyclic_stop(chip->dma.tx_chan); |
| 523 | else |
| 524 | ptcr |= ATMEL_PDC_TXTDIS; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 525 | if (chip->opened <= 1) |
| 526 | camr &= ~AC97C_CMR_CENA; |
| 527 | break; |
| 528 | default: |
| 529 | retval = -EINVAL; |
| 530 | goto out; |
| 531 | } |
| 532 | |
| 533 | ac97c_writel(chip, CAMR, camr); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 534 | if (!cpu_is_at32ap7000()) |
| 535 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 536 | out: |
| 537 | return retval; |
| 538 | } |
| 539 | |
| 540 | static int |
| 541 | atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
| 542 | { |
| 543 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 544 | unsigned long camr, ptcr = 0; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 545 | int retval = 0; |
| 546 | |
| 547 | camr = ac97c_readl(chip, CAMR); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 548 | ptcr = readl(chip->regs + ATMEL_PDC_PTSR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 549 | |
| 550 | switch (cmd) { |
| 551 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ |
| 552 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ |
| 553 | case SNDRV_PCM_TRIGGER_START: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 554 | if (cpu_is_at32ap7000()) { |
| 555 | retval = dw_dma_cyclic_start(chip->dma.rx_chan); |
| 556 | if (retval) |
| 557 | goto out; |
| 558 | } else { |
| 559 | ptcr = ATMEL_PDC_RXTEN; |
| 560 | } |
Sedji Gaouaou | ec2755a | 2010-02-25 18:59:40 +0100 | [diff] [blame] | 561 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 562 | break; |
| 563 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ |
| 564 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ |
| 565 | case SNDRV_PCM_TRIGGER_STOP: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 566 | if (cpu_is_at32ap7000()) |
| 567 | dw_dma_cyclic_stop(chip->dma.rx_chan); |
| 568 | else |
| 569 | ptcr |= (ATMEL_PDC_RXTDIS); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 570 | if (chip->opened <= 1) |
| 571 | camr &= ~AC97C_CMR_CENA; |
| 572 | break; |
| 573 | default: |
| 574 | retval = -EINVAL; |
| 575 | break; |
| 576 | } |
| 577 | |
| 578 | ac97c_writel(chip, CAMR, camr); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 579 | if (!cpu_is_at32ap7000()) |
| 580 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 581 | out: |
| 582 | return retval; |
| 583 | } |
| 584 | |
| 585 | static snd_pcm_uframes_t |
| 586 | atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream) |
| 587 | { |
| 588 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 589 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 590 | snd_pcm_uframes_t frames; |
| 591 | unsigned long bytes; |
| 592 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 593 | if (cpu_is_at32ap7000()) |
| 594 | bytes = dw_dma_get_src_addr(chip->dma.tx_chan); |
| 595 | else |
| 596 | bytes = readl(chip->regs + ATMEL_PDC_TPR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 597 | bytes -= runtime->dma_addr; |
| 598 | |
| 599 | frames = bytes_to_frames(runtime, bytes); |
| 600 | if (frames >= runtime->buffer_size) |
| 601 | frames -= runtime->buffer_size; |
| 602 | return frames; |
| 603 | } |
| 604 | |
| 605 | static snd_pcm_uframes_t |
| 606 | atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream) |
| 607 | { |
| 608 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
| 609 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 610 | snd_pcm_uframes_t frames; |
| 611 | unsigned long bytes; |
| 612 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 613 | if (cpu_is_at32ap7000()) |
| 614 | bytes = dw_dma_get_dst_addr(chip->dma.rx_chan); |
| 615 | else |
| 616 | bytes = readl(chip->regs + ATMEL_PDC_RPR); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 617 | bytes -= runtime->dma_addr; |
| 618 | |
| 619 | frames = bytes_to_frames(runtime, bytes); |
| 620 | if (frames >= runtime->buffer_size) |
| 621 | frames -= runtime->buffer_size; |
| 622 | return frames; |
| 623 | } |
| 624 | |
| 625 | static struct snd_pcm_ops atmel_ac97_playback_ops = { |
| 626 | .open = atmel_ac97c_playback_open, |
| 627 | .close = atmel_ac97c_playback_close, |
| 628 | .ioctl = snd_pcm_lib_ioctl, |
| 629 | .hw_params = atmel_ac97c_playback_hw_params, |
| 630 | .hw_free = atmel_ac97c_playback_hw_free, |
| 631 | .prepare = atmel_ac97c_playback_prepare, |
| 632 | .trigger = atmel_ac97c_playback_trigger, |
| 633 | .pointer = atmel_ac97c_playback_pointer, |
| 634 | }; |
| 635 | |
| 636 | static struct snd_pcm_ops atmel_ac97_capture_ops = { |
| 637 | .open = atmel_ac97c_capture_open, |
| 638 | .close = atmel_ac97c_capture_close, |
| 639 | .ioctl = snd_pcm_lib_ioctl, |
| 640 | .hw_params = atmel_ac97c_capture_hw_params, |
| 641 | .hw_free = atmel_ac97c_capture_hw_free, |
| 642 | .prepare = atmel_ac97c_capture_prepare, |
| 643 | .trigger = atmel_ac97c_capture_trigger, |
| 644 | .pointer = atmel_ac97c_capture_pointer, |
| 645 | }; |
| 646 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 647 | static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) |
| 648 | { |
| 649 | struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; |
| 650 | irqreturn_t retval = IRQ_NONE; |
| 651 | u32 sr = ac97c_readl(chip, SR); |
| 652 | u32 casr = ac97c_readl(chip, CASR); |
| 653 | u32 cosr = ac97c_readl(chip, COSR); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 654 | u32 camr = ac97c_readl(chip, CAMR); |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 655 | |
| 656 | if (sr & AC97C_SR_CAEVT) { |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 657 | struct snd_pcm_runtime *runtime; |
| 658 | int offset, next_period, block_size; |
Yegor Yefremov | f534116 | 2010-06-08 08:57:13 +0200 | [diff] [blame] | 659 | 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] | 660 | casr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
| 661 | casr & AC97C_CSR_RXRDY ? " RXRDY" : "", |
| 662 | casr & AC97C_CSR_UNRUN ? " UNRUN" : "", |
| 663 | casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", |
| 664 | casr & AC97C_CSR_TXRDY ? " TXRDY" : "", |
| 665 | !casr ? " NONE" : ""); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 666 | if (!cpu_is_at32ap7000()) { |
| 667 | if ((casr & camr) & AC97C_CSR_ENDTX) { |
| 668 | runtime = chip->playback_substream->runtime; |
| 669 | block_size = frames_to_bytes(runtime, |
| 670 | runtime->period_size); |
| 671 | chip->playback_period++; |
| 672 | |
| 673 | if (chip->playback_period == runtime->periods) |
| 674 | chip->playback_period = 0; |
| 675 | next_period = chip->playback_period + 1; |
| 676 | if (next_period == runtime->periods) |
| 677 | next_period = 0; |
| 678 | |
| 679 | offset = block_size * next_period; |
| 680 | |
| 681 | writel(runtime->dma_addr + offset, |
| 682 | chip->regs + ATMEL_PDC_TNPR); |
| 683 | writel(block_size / 2, |
| 684 | chip->regs + ATMEL_PDC_TNCR); |
| 685 | |
| 686 | snd_pcm_period_elapsed( |
| 687 | chip->playback_substream); |
| 688 | } |
| 689 | if ((casr & camr) & AC97C_CSR_ENDRX) { |
| 690 | runtime = chip->capture_substream->runtime; |
| 691 | block_size = frames_to_bytes(runtime, |
| 692 | runtime->period_size); |
| 693 | chip->capture_period++; |
| 694 | |
| 695 | if (chip->capture_period == runtime->periods) |
| 696 | chip->capture_period = 0; |
| 697 | next_period = chip->capture_period + 1; |
| 698 | if (next_period == runtime->periods) |
| 699 | next_period = 0; |
| 700 | |
| 701 | offset = block_size * next_period; |
| 702 | |
| 703 | writel(runtime->dma_addr + offset, |
| 704 | chip->regs + ATMEL_PDC_RNPR); |
| 705 | writel(block_size / 2, |
| 706 | chip->regs + ATMEL_PDC_RNCR); |
| 707 | snd_pcm_period_elapsed(chip->capture_substream); |
| 708 | } |
| 709 | } |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 710 | retval = IRQ_HANDLED; |
| 711 | } |
| 712 | |
| 713 | if (sr & AC97C_SR_COEVT) { |
| 714 | dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", |
| 715 | cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
| 716 | cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", |
| 717 | cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", |
| 718 | cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", |
| 719 | !cosr ? " NONE" : ""); |
| 720 | retval = IRQ_HANDLED; |
| 721 | } |
| 722 | |
| 723 | if (retval == IRQ_NONE) { |
| 724 | dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " |
| 725 | "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); |
| 726 | } |
| 727 | |
| 728 | return retval; |
| 729 | } |
| 730 | |
Bill Pemberton | 61dc674 | 2012-12-06 12:35:13 -0500 | [diff] [blame] | 731 | static struct ac97_pcm at91_ac97_pcm_defs[] = { |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 732 | /* Playback */ |
| 733 | { |
| 734 | .exclusive = 1, |
| 735 | .r = { { |
| 736 | .slots = ((1 << AC97_SLOT_PCM_LEFT) |
| 737 | | (1 << AC97_SLOT_PCM_RIGHT)), |
| 738 | } }, |
| 739 | }, |
| 740 | /* PCM in */ |
| 741 | { |
| 742 | .stream = 1, |
| 743 | .exclusive = 1, |
| 744 | .r = { { |
| 745 | .slots = ((1 << AC97_SLOT_PCM_LEFT) |
| 746 | | (1 << AC97_SLOT_PCM_RIGHT)), |
| 747 | } } |
| 748 | }, |
| 749 | /* Mic in */ |
| 750 | { |
| 751 | .stream = 1, |
| 752 | .exclusive = 1, |
| 753 | .r = { { |
| 754 | .slots = (1<<AC97_SLOT_MIC), |
| 755 | } } |
| 756 | }, |
| 757 | }; |
| 758 | |
Bill Pemberton | 61dc674 | 2012-12-06 12:35:13 -0500 | [diff] [blame] | 759 | static int atmel_ac97c_pcm_new(struct atmel_ac97c *chip) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 760 | { |
| 761 | struct snd_pcm *pcm; |
| 762 | struct snd_pcm_hardware hw = atmel_ac97c_hw; |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 763 | int capture, playback, retval, err; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 764 | |
| 765 | capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 766 | playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 767 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 768 | if (!cpu_is_at32ap7000()) { |
| 769 | err = snd_ac97_pcm_assign(chip->ac97_bus, |
| 770 | ARRAY_SIZE(at91_ac97_pcm_defs), |
| 771 | at91_ac97_pcm_defs); |
| 772 | if (err) |
| 773 | return err; |
| 774 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 775 | retval = snd_pcm_new(chip->card, chip->card->shortname, |
| 776 | chip->pdev->id, playback, capture, &pcm); |
| 777 | if (retval) |
| 778 | return retval; |
| 779 | |
| 780 | if (capture) |
| 781 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
| 782 | &atmel_ac97_capture_ops); |
| 783 | if (playback) |
| 784 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
| 785 | &atmel_ac97_playback_ops); |
| 786 | |
| 787 | retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, |
| 788 | &chip->pdev->dev, hw.periods_min * hw.period_bytes_min, |
| 789 | hw.buffer_bytes_max); |
| 790 | if (retval) |
| 791 | return retval; |
| 792 | |
| 793 | pcm->private_data = chip; |
| 794 | pcm->info_flags = 0; |
| 795 | strcpy(pcm->name, chip->card->shortname); |
| 796 | chip->pcm = pcm; |
| 797 | |
| 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip) |
| 802 | { |
| 803 | struct snd_ac97_template template; |
| 804 | memset(&template, 0, sizeof(template)); |
| 805 | template.private_data = chip; |
| 806 | return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97); |
| 807 | } |
| 808 | |
| 809 | static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg, |
| 810 | unsigned short val) |
| 811 | { |
| 812 | struct atmel_ac97c *chip = get_chip(ac97); |
| 813 | unsigned long word; |
| 814 | int timeout = 40; |
| 815 | |
| 816 | word = (reg & 0x7f) << 16 | val; |
| 817 | |
| 818 | do { |
| 819 | if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) { |
| 820 | ac97c_writel(chip, COTHR, word); |
| 821 | return; |
| 822 | } |
| 823 | udelay(1); |
| 824 | } while (--timeout); |
| 825 | |
| 826 | dev_dbg(&chip->pdev->dev, "codec write timeout\n"); |
| 827 | } |
| 828 | |
| 829 | static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97, |
| 830 | unsigned short reg) |
| 831 | { |
| 832 | struct atmel_ac97c *chip = get_chip(ac97); |
| 833 | unsigned long word; |
| 834 | int timeout = 40; |
| 835 | int write = 10; |
| 836 | |
| 837 | word = (0x80 | (reg & 0x7f)) << 16; |
| 838 | |
| 839 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) |
| 840 | ac97c_readl(chip, CORHR); |
| 841 | |
| 842 | retry_write: |
| 843 | timeout = 40; |
| 844 | |
| 845 | do { |
| 846 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) { |
| 847 | ac97c_writel(chip, COTHR, word); |
| 848 | goto read_reg; |
| 849 | } |
| 850 | udelay(10); |
| 851 | } while (--timeout); |
| 852 | |
| 853 | if (!--write) |
| 854 | goto timed_out; |
| 855 | goto retry_write; |
| 856 | |
| 857 | read_reg: |
| 858 | do { |
| 859 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) { |
| 860 | unsigned short val = ac97c_readl(chip, CORHR); |
| 861 | return val; |
| 862 | } |
| 863 | udelay(10); |
| 864 | } while (--timeout); |
| 865 | |
| 866 | if (!--write) |
| 867 | goto timed_out; |
| 868 | goto retry_write; |
| 869 | |
| 870 | timed_out: |
| 871 | dev_dbg(&chip->pdev->dev, "codec read timeout\n"); |
| 872 | return 0xffff; |
| 873 | } |
| 874 | |
| 875 | static bool filter(struct dma_chan *chan, void *slave) |
| 876 | { |
| 877 | struct dw_dma_slave *dws = slave; |
| 878 | |
| 879 | if (dws->dma_dev == chan->device->dev) { |
| 880 | chan->private = dws; |
| 881 | return true; |
| 882 | } else |
| 883 | return false; |
| 884 | } |
| 885 | |
| 886 | static void atmel_ac97c_reset(struct atmel_ac97c *chip) |
| 887 | { |
Hans-Christian Egtvedt | 81baf3a | 2009-04-02 08:21:15 +0200 | [diff] [blame] | 888 | ac97c_writel(chip, MR, 0); |
| 889 | ac97c_writel(chip, MR, AC97C_MR_ENA); |
| 890 | ac97c_writel(chip, CAMR, 0); |
| 891 | ac97c_writel(chip, COMR, 0); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 892 | |
| 893 | if (gpio_is_valid(chip->reset_pin)) { |
| 894 | gpio_set_value(chip->reset_pin, 0); |
| 895 | /* AC97 v2.2 specifications says minimum 1 us. */ |
Hans-Christian Egtvedt | 81baf3a | 2009-04-02 08:21:15 +0200 | [diff] [blame] | 896 | udelay(2); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 897 | gpio_set_value(chip->reset_pin, 1); |
Bo Shen | 8015e3d | 2011-12-19 17:57:52 +0800 | [diff] [blame] | 898 | } else { |
| 899 | ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); |
| 900 | udelay(2); |
| 901 | ac97c_writel(chip, MR, AC97C_MR_ENA); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 902 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 903 | } |
| 904 | |
Bill Pemberton | 61dc674 | 2012-12-06 12:35:13 -0500 | [diff] [blame] | 905 | static int atmel_ac97c_probe(struct platform_device *pdev) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 906 | { |
| 907 | struct snd_card *card; |
| 908 | struct atmel_ac97c *chip; |
| 909 | struct resource *regs; |
| 910 | struct ac97c_platform_data *pdata; |
| 911 | struct clk *pclk; |
| 912 | static struct snd_ac97_bus_ops ops = { |
| 913 | .write = atmel_ac97c_write, |
| 914 | .read = atmel_ac97c_read, |
| 915 | }; |
| 916 | int retval; |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 917 | int irq; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 918 | |
| 919 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 920 | if (!regs) { |
| 921 | dev_dbg(&pdev->dev, "no memory resource\n"); |
| 922 | return -ENXIO; |
| 923 | } |
| 924 | |
| 925 | pdata = pdev->dev.platform_data; |
| 926 | if (!pdata) { |
| 927 | dev_dbg(&pdev->dev, "no platform data\n"); |
| 928 | return -ENXIO; |
| 929 | } |
| 930 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 931 | irq = platform_get_irq(pdev, 0); |
| 932 | if (irq < 0) { |
| 933 | dev_dbg(&pdev->dev, "could not get irq\n"); |
| 934 | return -ENXIO; |
| 935 | } |
| 936 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 937 | if (cpu_is_at32ap7000()) { |
| 938 | pclk = clk_get(&pdev->dev, "pclk"); |
| 939 | } else { |
| 940 | pclk = clk_get(&pdev->dev, "ac97_clk"); |
| 941 | } |
| 942 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 943 | if (IS_ERR(pclk)) { |
| 944 | dev_dbg(&pdev->dev, "no peripheral clock\n"); |
| 945 | return PTR_ERR(pclk); |
| 946 | } |
| 947 | clk_enable(pclk); |
| 948 | |
| 949 | retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, |
| 950 | THIS_MODULE, sizeof(struct atmel_ac97c), &card); |
| 951 | if (retval) { |
| 952 | dev_dbg(&pdev->dev, "could not create sound card device\n"); |
| 953 | goto err_snd_card_new; |
| 954 | } |
| 955 | |
| 956 | chip = get_chip(card); |
| 957 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 958 | retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); |
| 959 | if (retval) { |
| 960 | dev_dbg(&pdev->dev, "unable to request irq %d\n", irq); |
| 961 | goto err_request_irq; |
| 962 | } |
| 963 | chip->irq = irq; |
| 964 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 965 | spin_lock_init(&chip->lock); |
| 966 | |
| 967 | strcpy(card->driver, "Atmel AC97C"); |
| 968 | strcpy(card->shortname, "Atmel AC97C"); |
| 969 | sprintf(card->longname, "Atmel AC97 controller"); |
| 970 | |
| 971 | chip->card = card; |
| 972 | chip->pclk = pclk; |
| 973 | chip->pdev = pdev; |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 974 | chip->regs = ioremap(regs->start, resource_size(regs)); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 975 | |
| 976 | if (!chip->regs) { |
| 977 | dev_dbg(&pdev->dev, "could not remap register memory\n"); |
Julia Lawall | 0c23e46 | 2012-08-19 09:02:57 +0200 | [diff] [blame] | 978 | retval = -ENOMEM; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 979 | goto err_ioremap; |
| 980 | } |
| 981 | |
| 982 | if (gpio_is_valid(pdata->reset_pin)) { |
| 983 | if (gpio_request(pdata->reset_pin, "reset_pin")) { |
| 984 | dev_dbg(&pdev->dev, "reset pin not available\n"); |
| 985 | chip->reset_pin = -ENODEV; |
| 986 | } else { |
| 987 | gpio_direction_output(pdata->reset_pin, 1); |
| 988 | chip->reset_pin = pdata->reset_pin; |
| 989 | } |
Bo Shen | b2522f9 | 2012-05-11 17:39:28 +0800 | [diff] [blame] | 990 | } else { |
| 991 | chip->reset_pin = -EINVAL; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | snd_card_set_dev(card, &pdev->dev); |
| 995 | |
Hans-Christian Egtvedt | 81baf3a | 2009-04-02 08:21:15 +0200 | [diff] [blame] | 996 | atmel_ac97c_reset(chip); |
| 997 | |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 998 | /* Enable overrun interrupt from codec channel */ |
| 999 | ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); |
| 1000 | ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); |
| 1001 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1002 | retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); |
| 1003 | if (retval) { |
| 1004 | dev_dbg(&pdev->dev, "could not register on ac97 bus\n"); |
| 1005 | goto err_ac97_bus; |
| 1006 | } |
| 1007 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1008 | retval = atmel_ac97c_mixer_new(chip); |
| 1009 | if (retval) { |
| 1010 | dev_dbg(&pdev->dev, "could not register ac97 mixer\n"); |
| 1011 | goto err_ac97_bus; |
| 1012 | } |
| 1013 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1014 | if (cpu_is_at32ap7000()) { |
| 1015 | if (pdata->rx_dws.dma_dev) { |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1016 | dma_cap_mask_t mask; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1017 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1018 | dma_cap_zero(mask); |
| 1019 | dma_cap_set(DMA_SLAVE, mask); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1020 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1021 | chip->dma.rx_chan = dma_request_channel(mask, filter, |
Viresh Kumar | e2b35f3 | 2012-02-01 16:12:27 +0530 | [diff] [blame] | 1022 | &pdata->rx_dws); |
| 1023 | if (chip->dma.rx_chan) { |
| 1024 | struct dma_slave_config dma_conf = { |
| 1025 | .src_addr = regs->start + AC97C_CARHR + |
| 1026 | 2, |
| 1027 | .src_addr_width = |
| 1028 | DMA_SLAVE_BUSWIDTH_2_BYTES, |
| 1029 | .src_maxburst = 1, |
| 1030 | .dst_maxburst = 1, |
| 1031 | .direction = DMA_DEV_TO_MEM, |
| 1032 | .device_fc = false, |
| 1033 | }; |
| 1034 | |
| 1035 | dmaengine_slave_config(chip->dma.rx_chan, |
| 1036 | &dma_conf); |
| 1037 | } |
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 | dev_info(&chip->pdev->dev, "using %s for DMA RX\n", |
Hans-Christian Egtvedt | 2357285 | 2009-04-02 08:21:17 +0200 | [diff] [blame] | 1040 | dev_name(&chip->dma.rx_chan->dev->device)); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1041 | set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1042 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1043 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1044 | if (pdata->tx_dws.dma_dev) { |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1045 | dma_cap_mask_t mask; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1046 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1047 | dma_cap_zero(mask); |
| 1048 | dma_cap_set(DMA_SLAVE, mask); |
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 | chip->dma.tx_chan = dma_request_channel(mask, filter, |
Viresh Kumar | e2b35f3 | 2012-02-01 16:12:27 +0530 | [diff] [blame] | 1051 | &pdata->tx_dws); |
| 1052 | if (chip->dma.tx_chan) { |
| 1053 | struct dma_slave_config dma_conf = { |
| 1054 | .dst_addr = regs->start + AC97C_CATHR + |
| 1055 | 2, |
| 1056 | .dst_addr_width = |
| 1057 | DMA_SLAVE_BUSWIDTH_2_BYTES, |
| 1058 | .src_maxburst = 1, |
| 1059 | .dst_maxburst = 1, |
| 1060 | .direction = DMA_MEM_TO_DEV, |
| 1061 | .device_fc = false, |
| 1062 | }; |
| 1063 | |
| 1064 | dmaengine_slave_config(chip->dma.tx_chan, |
| 1065 | &dma_conf); |
| 1066 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1067 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1068 | dev_info(&chip->pdev->dev, "using %s for DMA TX\n", |
Hans-Christian Egtvedt | 2357285 | 2009-04-02 08:21:17 +0200 | [diff] [blame] | 1069 | dev_name(&chip->dma.tx_chan->dev->device)); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1070 | set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 1071 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1072 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1073 | if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) && |
| 1074 | !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) { |
| 1075 | dev_dbg(&pdev->dev, "DMA not available\n"); |
| 1076 | retval = -ENODEV; |
| 1077 | goto err_dma; |
| 1078 | } |
| 1079 | } else { |
| 1080 | /* Just pretend that we have DMA channel(for at91 i is actually |
| 1081 | * the PDC) */ |
| 1082 | set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1083 | set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | retval = atmel_ac97c_pcm_new(chip); |
| 1087 | if (retval) { |
| 1088 | dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); |
| 1089 | goto err_dma; |
| 1090 | } |
| 1091 | |
| 1092 | retval = snd_card_register(card); |
| 1093 | if (retval) { |
| 1094 | dev_dbg(&pdev->dev, "could not register sound card\n"); |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 1095 | goto err_dma; |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | platform_set_drvdata(pdev, card); |
| 1099 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1100 | dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", |
| 1101 | chip->regs, irq); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1102 | |
| 1103 | return 0; |
| 1104 | |
| 1105 | err_dma: |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1106 | if (cpu_is_at32ap7000()) { |
| 1107 | if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) |
| 1108 | dma_release_channel(chip->dma.rx_chan); |
| 1109 | if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) |
| 1110 | dma_release_channel(chip->dma.tx_chan); |
| 1111 | clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1112 | clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 1113 | chip->dma.rx_chan = NULL; |
| 1114 | chip->dma.tx_chan = NULL; |
| 1115 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1116 | err_ac97_bus: |
| 1117 | snd_card_set_dev(card, NULL); |
| 1118 | |
| 1119 | if (gpio_is_valid(chip->reset_pin)) |
| 1120 | gpio_free(chip->reset_pin); |
| 1121 | |
| 1122 | iounmap(chip->regs); |
| 1123 | err_ioremap: |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 1124 | free_irq(irq, chip); |
| 1125 | err_request_irq: |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1126 | snd_card_free(card); |
| 1127 | err_snd_card_new: |
| 1128 | clk_disable(pclk); |
| 1129 | clk_put(pclk); |
| 1130 | return retval; |
| 1131 | } |
| 1132 | |
Takashi Iwai | d34e4e0 | 2012-08-09 15:47:15 +0200 | [diff] [blame] | 1133 | #ifdef CONFIG_PM_SLEEP |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1134 | static int atmel_ac97c_suspend(struct device *pdev) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1135 | { |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1136 | struct snd_card *card = dev_get_drvdata(pdev); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1137 | struct atmel_ac97c *chip = card->private_data; |
| 1138 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1139 | if (cpu_is_at32ap7000()) { |
| 1140 | if (test_bit(DMA_RX_READY, &chip->flags)) |
| 1141 | dw_dma_cyclic_stop(chip->dma.rx_chan); |
| 1142 | if (test_bit(DMA_TX_READY, &chip->flags)) |
| 1143 | dw_dma_cyclic_stop(chip->dma.tx_chan); |
| 1144 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1145 | clk_disable(chip->pclk); |
| 1146 | |
| 1147 | return 0; |
| 1148 | } |
| 1149 | |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1150 | static int atmel_ac97c_resume(struct device *pdev) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1151 | { |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1152 | struct snd_card *card = dev_get_drvdata(pdev); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1153 | struct atmel_ac97c *chip = card->private_data; |
| 1154 | |
| 1155 | clk_enable(chip->pclk); |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1156 | if (cpu_is_at32ap7000()) { |
| 1157 | if (test_bit(DMA_RX_READY, &chip->flags)) |
| 1158 | dw_dma_cyclic_start(chip->dma.rx_chan); |
| 1159 | if (test_bit(DMA_TX_READY, &chip->flags)) |
| 1160 | dw_dma_cyclic_start(chip->dma.tx_chan); |
| 1161 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1162 | return 0; |
| 1163 | } |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1164 | |
| 1165 | static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume); |
| 1166 | #define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1167 | #else |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1168 | #define ATMEL_AC97C_PM_OPS NULL |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1169 | #endif |
| 1170 | |
Bill Pemberton | 61dc674 | 2012-12-06 12:35:13 -0500 | [diff] [blame] | 1171 | static int atmel_ac97c_remove(struct platform_device *pdev) |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1172 | { |
| 1173 | struct snd_card *card = platform_get_drvdata(pdev); |
| 1174 | struct atmel_ac97c *chip = get_chip(card); |
| 1175 | |
| 1176 | if (gpio_is_valid(chip->reset_pin)) |
| 1177 | gpio_free(chip->reset_pin); |
| 1178 | |
Hans-Christian Egtvedt | bd74a18 | 2009-04-02 08:21:16 +0200 | [diff] [blame] | 1179 | ac97c_writel(chip, CAMR, 0); |
| 1180 | ac97c_writel(chip, COMR, 0); |
| 1181 | ac97c_writel(chip, MR, 0); |
| 1182 | |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1183 | clk_disable(chip->pclk); |
| 1184 | clk_put(chip->pclk); |
| 1185 | iounmap(chip->regs); |
Hans-Christian Egtvedt | df16358 | 2009-04-02 08:21:14 +0200 | [diff] [blame] | 1186 | free_irq(chip->irq, chip); |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1187 | |
Sedji Gaouaou | 7177395 | 2010-03-01 12:19:18 +0100 | [diff] [blame] | 1188 | if (cpu_is_at32ap7000()) { |
| 1189 | if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) |
| 1190 | dma_release_channel(chip->dma.rx_chan); |
| 1191 | if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) |
| 1192 | dma_release_channel(chip->dma.tx_chan); |
| 1193 | clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
| 1194 | clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
| 1195 | chip->dma.rx_chan = NULL; |
| 1196 | chip->dma.tx_chan = NULL; |
| 1197 | } |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1198 | |
| 1199 | snd_card_set_dev(card, NULL); |
| 1200 | snd_card_free(card); |
| 1201 | |
| 1202 | platform_set_drvdata(pdev, NULL); |
| 1203 | |
| 1204 | return 0; |
| 1205 | } |
| 1206 | |
| 1207 | static struct platform_driver atmel_ac97c_driver = { |
Bill Pemberton | 61dc674 | 2012-12-06 12:35:13 -0500 | [diff] [blame] | 1208 | .remove = atmel_ac97c_remove, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1209 | .driver = { |
| 1210 | .name = "atmel_ac97c", |
Takashi Iwai | 8bf01d8 | 2012-07-02 10:50:24 +0200 | [diff] [blame] | 1211 | .owner = THIS_MODULE, |
Takashi Iwai | 284e7ca | 2012-07-02 11:22:40 +0200 | [diff] [blame] | 1212 | .pm = ATMEL_AC97C_PM_OPS, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1213 | }, |
Hans-Christian Egtvedt | 4ede028 | 2009-02-05 13:11:00 +0100 | [diff] [blame] | 1214 | }; |
| 1215 | |
| 1216 | static int __init atmel_ac97c_init(void) |
| 1217 | { |
| 1218 | return platform_driver_probe(&atmel_ac97c_driver, |
| 1219 | atmel_ac97c_probe); |
| 1220 | } |
| 1221 | module_init(atmel_ac97c_init); |
| 1222 | |
| 1223 | static void __exit atmel_ac97c_exit(void) |
| 1224 | { |
| 1225 | platform_driver_unregister(&atmel_ac97c_driver); |
| 1226 | } |
| 1227 | module_exit(atmel_ac97c_exit); |
| 1228 | |
| 1229 | MODULE_LICENSE("GPL"); |
| 1230 | MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); |
Hans-Christian Egtvedt | 0cfae7c | 2011-06-28 16:59:14 +0200 | [diff] [blame] | 1231 | MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |