Jassi Brar | 5033f43 | 2010-11-22 15:37:25 +0900 | [diff] [blame] | 1 | /* sound/soc/samsung/pcm.c |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 2 | * |
| 3 | * ALSA SoC Audio Layer - S3C PCM-Controller driver |
| 4 | * |
| 5 | * Copyright (c) 2009 Samsung Electronics Co. Ltd |
| 6 | * Author: Jaswinder Singh <jassi.brar@samsung.com> |
| 7 | * based upon I2S drivers by Ben Dooks. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 14 | #include <linux/clk.h> |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 15 | #include <linux/io.h> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame] | 16 | #include <linux/module.h> |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 17 | |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 18 | #include <sound/soc.h> |
Seungwhan Youn | 0378b6a | 2011-01-11 07:26:06 +0900 | [diff] [blame] | 19 | #include <sound/pcm_params.h> |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 20 | |
| 21 | #include <plat/audio.h> |
| 22 | #include <plat/dma.h> |
| 23 | |
Jassi Brar | 4b640cf | 2010-11-22 15:35:57 +0900 | [diff] [blame] | 24 | #include "dma.h" |
Jassi Brar | 158a7828 | 2010-11-22 15:36:44 +0900 | [diff] [blame] | 25 | #include "pcm.h" |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 26 | |
Seungwhan Youn | 9c6df19 | 2011-01-07 13:57:23 +0900 | [diff] [blame] | 27 | /*Register Offsets */ |
| 28 | #define S3C_PCM_CTL 0x00 |
| 29 | #define S3C_PCM_CLKCTL 0x04 |
| 30 | #define S3C_PCM_TXFIFO 0x08 |
| 31 | #define S3C_PCM_RXFIFO 0x0C |
| 32 | #define S3C_PCM_IRQCTL 0x10 |
| 33 | #define S3C_PCM_IRQSTAT 0x14 |
| 34 | #define S3C_PCM_FIFOSTAT 0x18 |
| 35 | #define S3C_PCM_CLRINT 0x20 |
| 36 | |
| 37 | /* PCM_CTL Bit-Fields */ |
| 38 | #define S3C_PCM_CTL_TXDIPSTICK_MASK 0x3f |
| 39 | #define S3C_PCM_CTL_TXDIPSTICK_SHIFT 13 |
| 40 | #define S3C_PCM_CTL_RXDIPSTICK_MASK 0x3f |
| 41 | #define S3C_PCM_CTL_RXDIPSTICK_SHIFT 7 |
| 42 | #define S3C_PCM_CTL_TXDMA_EN (0x1 << 6) |
| 43 | #define S3C_PCM_CTL_RXDMA_EN (0x1 << 5) |
| 44 | #define S3C_PCM_CTL_TXMSB_AFTER_FSYNC (0x1 << 4) |
| 45 | #define S3C_PCM_CTL_RXMSB_AFTER_FSYNC (0x1 << 3) |
| 46 | #define S3C_PCM_CTL_TXFIFO_EN (0x1 << 2) |
| 47 | #define S3C_PCM_CTL_RXFIFO_EN (0x1 << 1) |
| 48 | #define S3C_PCM_CTL_ENABLE (0x1 << 0) |
| 49 | |
| 50 | /* PCM_CLKCTL Bit-Fields */ |
| 51 | #define S3C_PCM_CLKCTL_SERCLK_EN (0x1 << 19) |
| 52 | #define S3C_PCM_CLKCTL_SERCLKSEL_PCLK (0x1 << 18) |
| 53 | #define S3C_PCM_CLKCTL_SCLKDIV_MASK 0x1ff |
| 54 | #define S3C_PCM_CLKCTL_SYNCDIV_MASK 0x1ff |
| 55 | #define S3C_PCM_CLKCTL_SCLKDIV_SHIFT 9 |
| 56 | #define S3C_PCM_CLKCTL_SYNCDIV_SHIFT 0 |
| 57 | |
| 58 | /* PCM_TXFIFO Bit-Fields */ |
| 59 | #define S3C_PCM_TXFIFO_DVALID (0x1 << 16) |
| 60 | #define S3C_PCM_TXFIFO_DATA_MSK (0xffff << 0) |
| 61 | |
| 62 | /* PCM_RXFIFO Bit-Fields */ |
| 63 | #define S3C_PCM_RXFIFO_DVALID (0x1 << 16) |
| 64 | #define S3C_PCM_RXFIFO_DATA_MSK (0xffff << 0) |
| 65 | |
| 66 | /* PCM_IRQCTL Bit-Fields */ |
| 67 | #define S3C_PCM_IRQCTL_IRQEN (0x1 << 14) |
| 68 | #define S3C_PCM_IRQCTL_WRDEN (0x1 << 12) |
| 69 | #define S3C_PCM_IRQCTL_TXEMPTYEN (0x1 << 11) |
| 70 | #define S3C_PCM_IRQCTL_TXALMSTEMPTYEN (0x1 << 10) |
| 71 | #define S3C_PCM_IRQCTL_TXFULLEN (0x1 << 9) |
| 72 | #define S3C_PCM_IRQCTL_TXALMSTFULLEN (0x1 << 8) |
| 73 | #define S3C_PCM_IRQCTL_TXSTARVEN (0x1 << 7) |
| 74 | #define S3C_PCM_IRQCTL_TXERROVRFLEN (0x1 << 6) |
| 75 | #define S3C_PCM_IRQCTL_RXEMPTEN (0x1 << 5) |
| 76 | #define S3C_PCM_IRQCTL_RXALMSTEMPTEN (0x1 << 4) |
| 77 | #define S3C_PCM_IRQCTL_RXFULLEN (0x1 << 3) |
| 78 | #define S3C_PCM_IRQCTL_RXALMSTFULLEN (0x1 << 2) |
| 79 | #define S3C_PCM_IRQCTL_RXSTARVEN (0x1 << 1) |
| 80 | #define S3C_PCM_IRQCTL_RXERROVRFLEN (0x1 << 0) |
| 81 | |
| 82 | /* PCM_IRQSTAT Bit-Fields */ |
| 83 | #define S3C_PCM_IRQSTAT_IRQPND (0x1 << 13) |
| 84 | #define S3C_PCM_IRQSTAT_WRD_XFER (0x1 << 12) |
| 85 | #define S3C_PCM_IRQSTAT_TXEMPTY (0x1 << 11) |
| 86 | #define S3C_PCM_IRQSTAT_TXALMSTEMPTY (0x1 << 10) |
| 87 | #define S3C_PCM_IRQSTAT_TXFULL (0x1 << 9) |
| 88 | #define S3C_PCM_IRQSTAT_TXALMSTFULL (0x1 << 8) |
| 89 | #define S3C_PCM_IRQSTAT_TXSTARV (0x1 << 7) |
| 90 | #define S3C_PCM_IRQSTAT_TXERROVRFL (0x1 << 6) |
| 91 | #define S3C_PCM_IRQSTAT_RXEMPT (0x1 << 5) |
| 92 | #define S3C_PCM_IRQSTAT_RXALMSTEMPT (0x1 << 4) |
| 93 | #define S3C_PCM_IRQSTAT_RXFULL (0x1 << 3) |
| 94 | #define S3C_PCM_IRQSTAT_RXALMSTFULL (0x1 << 2) |
| 95 | #define S3C_PCM_IRQSTAT_RXSTARV (0x1 << 1) |
| 96 | #define S3C_PCM_IRQSTAT_RXERROVRFL (0x1 << 0) |
| 97 | |
| 98 | /* PCM_FIFOSTAT Bit-Fields */ |
| 99 | #define S3C_PCM_FIFOSTAT_TXCNT_MSK (0x3f << 14) |
| 100 | #define S3C_PCM_FIFOSTAT_TXFIFOEMPTY (0x1 << 13) |
| 101 | #define S3C_PCM_FIFOSTAT_TXFIFOALMSTEMPTY (0x1 << 12) |
| 102 | #define S3C_PCM_FIFOSTAT_TXFIFOFULL (0x1 << 11) |
| 103 | #define S3C_PCM_FIFOSTAT_TXFIFOALMSTFULL (0x1 << 10) |
| 104 | #define S3C_PCM_FIFOSTAT_RXCNT_MSK (0x3f << 4) |
| 105 | #define S3C_PCM_FIFOSTAT_RXFIFOEMPTY (0x1 << 3) |
| 106 | #define S3C_PCM_FIFOSTAT_RXFIFOALMSTEMPTY (0x1 << 2) |
| 107 | #define S3C_PCM_FIFOSTAT_RXFIFOFULL (0x1 << 1) |
| 108 | #define S3C_PCM_FIFOSTAT_RXFIFOALMSTFULL (0x1 << 0) |
| 109 | |
| 110 | /** |
| 111 | * struct s3c_pcm_info - S3C PCM Controller information |
| 112 | * @dev: The parent device passed to use from the probe. |
| 113 | * @regs: The pointer to the device register block. |
| 114 | * @dma_playback: DMA information for playback channel. |
| 115 | * @dma_capture: DMA information for capture channel. |
| 116 | */ |
| 117 | struct s3c_pcm_info { |
| 118 | spinlock_t lock; |
| 119 | struct device *dev; |
| 120 | void __iomem *regs; |
| 121 | |
| 122 | unsigned int sclk_per_fs; |
| 123 | |
| 124 | /* Whether to keep PCMSCLK enabled even when idle(no active xfer) */ |
| 125 | unsigned int idleclk; |
| 126 | |
| 127 | struct clk *pclk; |
| 128 | struct clk *cclk; |
| 129 | |
| 130 | struct s3c_dma_params *dma_playback; |
| 131 | struct s3c_dma_params *dma_capture; |
| 132 | }; |
| 133 | |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 134 | static struct s3c2410_dma_client s3c_pcm_dma_client_out = { |
| 135 | .name = "PCM Stereo out" |
| 136 | }; |
| 137 | |
| 138 | static struct s3c2410_dma_client s3c_pcm_dma_client_in = { |
| 139 | .name = "PCM Stereo in" |
| 140 | }; |
| 141 | |
| 142 | static struct s3c_dma_params s3c_pcm_stereo_out[] = { |
| 143 | [0] = { |
| 144 | .client = &s3c_pcm_dma_client_out, |
| 145 | .dma_size = 4, |
| 146 | }, |
| 147 | [1] = { |
| 148 | .client = &s3c_pcm_dma_client_out, |
| 149 | .dma_size = 4, |
| 150 | }, |
| 151 | }; |
| 152 | |
| 153 | static struct s3c_dma_params s3c_pcm_stereo_in[] = { |
| 154 | [0] = { |
| 155 | .client = &s3c_pcm_dma_client_in, |
| 156 | .dma_size = 4, |
| 157 | }, |
| 158 | [1] = { |
| 159 | .client = &s3c_pcm_dma_client_in, |
| 160 | .dma_size = 4, |
| 161 | }, |
| 162 | }; |
| 163 | |
| 164 | static struct s3c_pcm_info s3c_pcm[2]; |
| 165 | |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 166 | static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on) |
| 167 | { |
| 168 | void __iomem *regs = pcm->regs; |
| 169 | u32 ctl, clkctl; |
| 170 | |
| 171 | clkctl = readl(regs + S3C_PCM_CLKCTL); |
| 172 | ctl = readl(regs + S3C_PCM_CTL); |
| 173 | ctl &= ~(S3C_PCM_CTL_TXDIPSTICK_MASK |
| 174 | << S3C_PCM_CTL_TXDIPSTICK_SHIFT); |
| 175 | |
| 176 | if (on) { |
| 177 | ctl |= S3C_PCM_CTL_TXDMA_EN; |
| 178 | ctl |= S3C_PCM_CTL_TXFIFO_EN; |
| 179 | ctl |= S3C_PCM_CTL_ENABLE; |
Seungwhan Youn | 29f9e39 | 2010-09-10 17:20:45 +0900 | [diff] [blame] | 180 | ctl |= (0x4<<S3C_PCM_CTL_TXDIPSTICK_SHIFT); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 181 | clkctl |= S3C_PCM_CLKCTL_SERCLK_EN; |
| 182 | } else { |
| 183 | ctl &= ~S3C_PCM_CTL_TXDMA_EN; |
| 184 | ctl &= ~S3C_PCM_CTL_TXFIFO_EN; |
| 185 | |
| 186 | if (!(ctl & S3C_PCM_CTL_RXFIFO_EN)) { |
| 187 | ctl &= ~S3C_PCM_CTL_ENABLE; |
| 188 | if (!pcm->idleclk) |
| 189 | clkctl |= S3C_PCM_CLKCTL_SERCLK_EN; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | writel(clkctl, regs + S3C_PCM_CLKCTL); |
| 194 | writel(ctl, regs + S3C_PCM_CTL); |
| 195 | } |
| 196 | |
| 197 | static void s3c_pcm_snd_rxctrl(struct s3c_pcm_info *pcm, int on) |
| 198 | { |
| 199 | void __iomem *regs = pcm->regs; |
| 200 | u32 ctl, clkctl; |
| 201 | |
| 202 | ctl = readl(regs + S3C_PCM_CTL); |
| 203 | clkctl = readl(regs + S3C_PCM_CLKCTL); |
Seungwhan Youn | 0cca901 | 2010-09-10 17:20:00 +0900 | [diff] [blame] | 204 | ctl &= ~(S3C_PCM_CTL_RXDIPSTICK_MASK |
| 205 | << S3C_PCM_CTL_RXDIPSTICK_SHIFT); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 206 | |
| 207 | if (on) { |
| 208 | ctl |= S3C_PCM_CTL_RXDMA_EN; |
| 209 | ctl |= S3C_PCM_CTL_RXFIFO_EN; |
| 210 | ctl |= S3C_PCM_CTL_ENABLE; |
Seungwhan Youn | 0cca901 | 2010-09-10 17:20:00 +0900 | [diff] [blame] | 211 | ctl |= (0x20<<S3C_PCM_CTL_RXDIPSTICK_SHIFT); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 212 | clkctl |= S3C_PCM_CLKCTL_SERCLK_EN; |
| 213 | } else { |
| 214 | ctl &= ~S3C_PCM_CTL_RXDMA_EN; |
| 215 | ctl &= ~S3C_PCM_CTL_RXFIFO_EN; |
| 216 | |
| 217 | if (!(ctl & S3C_PCM_CTL_TXFIFO_EN)) { |
| 218 | ctl &= ~S3C_PCM_CTL_ENABLE; |
| 219 | if (!pcm->idleclk) |
| 220 | clkctl |= S3C_PCM_CLKCTL_SERCLK_EN; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | writel(clkctl, regs + S3C_PCM_CLKCTL); |
| 225 | writel(ctl, regs + S3C_PCM_CTL); |
| 226 | } |
| 227 | |
| 228 | static int s3c_pcm_trigger(struct snd_pcm_substream *substream, int cmd, |
| 229 | struct snd_soc_dai *dai) |
| 230 | { |
| 231 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 232 | struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 233 | unsigned long flags; |
| 234 | |
| 235 | dev_dbg(pcm->dev, "Entered %s\n", __func__); |
| 236 | |
| 237 | switch (cmd) { |
| 238 | case SNDRV_PCM_TRIGGER_START: |
| 239 | case SNDRV_PCM_TRIGGER_RESUME: |
| 240 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 241 | spin_lock_irqsave(&pcm->lock, flags); |
| 242 | |
| 243 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 244 | s3c_pcm_snd_rxctrl(pcm, 1); |
| 245 | else |
| 246 | s3c_pcm_snd_txctrl(pcm, 1); |
| 247 | |
| 248 | spin_unlock_irqrestore(&pcm->lock, flags); |
| 249 | break; |
| 250 | |
| 251 | case SNDRV_PCM_TRIGGER_STOP: |
| 252 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 253 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 254 | spin_lock_irqsave(&pcm->lock, flags); |
| 255 | |
| 256 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 257 | s3c_pcm_snd_rxctrl(pcm, 0); |
| 258 | else |
| 259 | s3c_pcm_snd_txctrl(pcm, 0); |
| 260 | |
| 261 | spin_unlock_irqrestore(&pcm->lock, flags); |
| 262 | break; |
| 263 | |
| 264 | default: |
| 265 | return -EINVAL; |
| 266 | } |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int s3c_pcm_hw_params(struct snd_pcm_substream *substream, |
| 272 | struct snd_pcm_hw_params *params, |
| 273 | struct snd_soc_dai *socdai) |
| 274 | { |
| 275 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 276 | struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 277 | struct s3c_dma_params *dma_data; |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 278 | void __iomem *regs = pcm->regs; |
| 279 | struct clk *clk; |
| 280 | int sclk_div, sync_div; |
| 281 | unsigned long flags; |
| 282 | u32 clkctl; |
| 283 | |
| 284 | dev_dbg(pcm->dev, "Entered %s\n", __func__); |
| 285 | |
| 286 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 287 | dma_data = pcm->dma_playback; |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 288 | else |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 289 | dma_data = pcm->dma_capture; |
| 290 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 291 | snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 292 | |
| 293 | /* Strictly check for sample size */ |
| 294 | switch (params_format(params)) { |
| 295 | case SNDRV_PCM_FORMAT_S16_LE: |
| 296 | break; |
| 297 | default: |
| 298 | return -EINVAL; |
| 299 | } |
| 300 | |
| 301 | spin_lock_irqsave(&pcm->lock, flags); |
| 302 | |
| 303 | /* Get hold of the PCMSOURCE_CLK */ |
| 304 | clkctl = readl(regs + S3C_PCM_CLKCTL); |
| 305 | if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK) |
| 306 | clk = pcm->pclk; |
| 307 | else |
| 308 | clk = pcm->cclk; |
| 309 | |
| 310 | /* Set the SCLK divider */ |
| 311 | sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs / |
| 312 | params_rate(params) / 2 - 1; |
| 313 | |
| 314 | clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK |
| 315 | << S3C_PCM_CLKCTL_SCLKDIV_SHIFT); |
| 316 | clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK) |
| 317 | << S3C_PCM_CLKCTL_SCLKDIV_SHIFT); |
| 318 | |
| 319 | /* Set the SYNC divider */ |
| 320 | sync_div = pcm->sclk_per_fs - 1; |
| 321 | |
| 322 | clkctl &= ~(S3C_PCM_CLKCTL_SYNCDIV_MASK |
| 323 | << S3C_PCM_CLKCTL_SYNCDIV_SHIFT); |
| 324 | clkctl |= ((sync_div & S3C_PCM_CLKCTL_SYNCDIV_MASK) |
| 325 | << S3C_PCM_CLKCTL_SYNCDIV_SHIFT); |
| 326 | |
| 327 | writel(clkctl, regs + S3C_PCM_CLKCTL); |
| 328 | |
| 329 | spin_unlock_irqrestore(&pcm->lock, flags); |
| 330 | |
Joe Perches | 59cdd9b | 2010-02-01 23:22:16 -0800 | [diff] [blame] | 331 | dev_dbg(pcm->dev, "PCMSOURCE_CLK-%lu SCLK=%ufs SCLK_DIV=%d SYNC_DIV=%d\n", |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 332 | clk_get_rate(clk), pcm->sclk_per_fs, |
| 333 | sclk_div, sync_div); |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int s3c_pcm_set_fmt(struct snd_soc_dai *cpu_dai, |
| 339 | unsigned int fmt) |
| 340 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 341 | struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 342 | void __iomem *regs = pcm->regs; |
| 343 | unsigned long flags; |
| 344 | int ret = 0; |
| 345 | u32 ctl; |
| 346 | |
| 347 | dev_dbg(pcm->dev, "Entered %s\n", __func__); |
| 348 | |
| 349 | spin_lock_irqsave(&pcm->lock, flags); |
| 350 | |
| 351 | ctl = readl(regs + S3C_PCM_CTL); |
| 352 | |
| 353 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
Sangbeom Kim | 68e0c66 | 2011-04-09 10:53:58 +0900 | [diff] [blame] | 354 | case SND_SOC_DAIFMT_IB_NF: |
| 355 | /* Nothing to do, IB_NF by default */ |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 356 | break; |
| 357 | default: |
| 358 | dev_err(pcm->dev, "Unsupported clock inversion!\n"); |
| 359 | ret = -EINVAL; |
| 360 | goto exit; |
| 361 | } |
| 362 | |
| 363 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 364 | case SND_SOC_DAIFMT_CBS_CFS: |
| 365 | /* Nothing to do, Master by default */ |
| 366 | break; |
| 367 | default: |
| 368 | dev_err(pcm->dev, "Unsupported master/slave format!\n"); |
| 369 | ret = -EINVAL; |
| 370 | goto exit; |
| 371 | } |
| 372 | |
| 373 | switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) { |
| 374 | case SND_SOC_DAIFMT_CONT: |
| 375 | pcm->idleclk = 1; |
| 376 | break; |
| 377 | case SND_SOC_DAIFMT_GATED: |
| 378 | pcm->idleclk = 0; |
| 379 | break; |
| 380 | default: |
| 381 | dev_err(pcm->dev, "Invalid Clock gating request!\n"); |
| 382 | ret = -EINVAL; |
| 383 | goto exit; |
| 384 | } |
| 385 | |
| 386 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 387 | case SND_SOC_DAIFMT_DSP_A: |
| 388 | ctl |= S3C_PCM_CTL_TXMSB_AFTER_FSYNC; |
| 389 | ctl |= S3C_PCM_CTL_RXMSB_AFTER_FSYNC; |
| 390 | break; |
| 391 | case SND_SOC_DAIFMT_DSP_B: |
| 392 | ctl &= ~S3C_PCM_CTL_TXMSB_AFTER_FSYNC; |
| 393 | ctl &= ~S3C_PCM_CTL_RXMSB_AFTER_FSYNC; |
| 394 | break; |
| 395 | default: |
| 396 | dev_err(pcm->dev, "Unsupported data format!\n"); |
| 397 | ret = -EINVAL; |
| 398 | goto exit; |
| 399 | } |
| 400 | |
| 401 | writel(ctl, regs + S3C_PCM_CTL); |
| 402 | |
| 403 | exit: |
| 404 | spin_unlock_irqrestore(&pcm->lock, flags); |
| 405 | |
| 406 | return ret; |
| 407 | } |
| 408 | |
| 409 | static int s3c_pcm_set_clkdiv(struct snd_soc_dai *cpu_dai, |
| 410 | int div_id, int div) |
| 411 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 412 | struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 413 | |
| 414 | switch (div_id) { |
| 415 | case S3C_PCM_SCLK_PER_FS: |
| 416 | pcm->sclk_per_fs = div; |
| 417 | break; |
| 418 | |
| 419 | default: |
| 420 | return -EINVAL; |
| 421 | } |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int s3c_pcm_set_sysclk(struct snd_soc_dai *cpu_dai, |
| 427 | int clk_id, unsigned int freq, int dir) |
| 428 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 429 | struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 430 | void __iomem *regs = pcm->regs; |
| 431 | u32 clkctl = readl(regs + S3C_PCM_CLKCTL); |
| 432 | |
| 433 | switch (clk_id) { |
| 434 | case S3C_PCM_CLKSRC_PCLK: |
| 435 | clkctl |= S3C_PCM_CLKCTL_SERCLKSEL_PCLK; |
| 436 | break; |
| 437 | |
| 438 | case S3C_PCM_CLKSRC_MUX: |
| 439 | clkctl &= ~S3C_PCM_CLKCTL_SERCLKSEL_PCLK; |
| 440 | |
| 441 | if (clk_get_rate(pcm->cclk) != freq) |
| 442 | clk_set_rate(pcm->cclk, freq); |
| 443 | |
| 444 | break; |
| 445 | |
| 446 | default: |
| 447 | return -EINVAL; |
| 448 | } |
| 449 | |
| 450 | writel(clkctl, regs + S3C_PCM_CLKCTL); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | static struct snd_soc_dai_ops s3c_pcm_dai_ops = { |
| 456 | .set_sysclk = s3c_pcm_set_sysclk, |
| 457 | .set_clkdiv = s3c_pcm_set_clkdiv, |
| 458 | .trigger = s3c_pcm_trigger, |
| 459 | .hw_params = s3c_pcm_hw_params, |
| 460 | .set_fmt = s3c_pcm_set_fmt, |
| 461 | }; |
| 462 | |
| 463 | #define S3C_PCM_RATES SNDRV_PCM_RATE_8000_96000 |
| 464 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 465 | #define S3C_PCM_DAI_DECLARE \ |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 466 | .symmetric_rates = 1, \ |
| 467 | .ops = &s3c_pcm_dai_ops, \ |
| 468 | .playback = { \ |
| 469 | .channels_min = 2, \ |
| 470 | .channels_max = 2, \ |
| 471 | .rates = S3C_PCM_RATES, \ |
| 472 | .formats = SNDRV_PCM_FMTBIT_S16_LE, \ |
| 473 | }, \ |
| 474 | .capture = { \ |
| 475 | .channels_min = 2, \ |
| 476 | .channels_max = 2, \ |
| 477 | .rates = S3C_PCM_RATES, \ |
| 478 | .formats = SNDRV_PCM_FMTBIT_S16_LE, \ |
Jassi Brar | 12280fa | 2010-09-10 16:41:05 +0900 | [diff] [blame] | 479 | } |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 480 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 481 | struct snd_soc_dai_driver s3c_pcm_dai[] = { |
Jassi Brar | 12280fa | 2010-09-10 16:41:05 +0900 | [diff] [blame] | 482 | [0] = { |
| 483 | .name = "samsung-pcm.0", |
| 484 | S3C_PCM_DAI_DECLARE, |
| 485 | }, |
| 486 | [1] = { |
| 487 | .name = "samsung-pcm.1", |
| 488 | S3C_PCM_DAI_DECLARE, |
| 489 | }, |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 490 | }; |
| 491 | EXPORT_SYMBOL_GPL(s3c_pcm_dai); |
| 492 | |
| 493 | static __devinit int s3c_pcm_dev_probe(struct platform_device *pdev) |
| 494 | { |
| 495 | struct s3c_pcm_info *pcm; |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 496 | struct resource *mem_res, *dmatx_res, *dmarx_res; |
| 497 | struct s3c_audio_pdata *pcm_pdata; |
| 498 | int ret; |
| 499 | |
| 500 | /* Check for valid device index */ |
| 501 | if ((pdev->id < 0) || pdev->id >= ARRAY_SIZE(s3c_pcm)) { |
| 502 | dev_err(&pdev->dev, "id %d out of range\n", pdev->id); |
| 503 | return -EINVAL; |
| 504 | } |
| 505 | |
| 506 | pcm_pdata = pdev->dev.platform_data; |
| 507 | |
| 508 | /* Check for availability of necessary resource */ |
| 509 | dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 510 | if (!dmatx_res) { |
| 511 | dev_err(&pdev->dev, "Unable to get PCM-TX dma resource\n"); |
| 512 | return -ENXIO; |
| 513 | } |
| 514 | |
| 515 | dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| 516 | if (!dmarx_res) { |
| 517 | dev_err(&pdev->dev, "Unable to get PCM-RX dma resource\n"); |
| 518 | return -ENXIO; |
| 519 | } |
| 520 | |
| 521 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 522 | if (!mem_res) { |
| 523 | dev_err(&pdev->dev, "Unable to get register resource\n"); |
| 524 | return -ENXIO; |
| 525 | } |
| 526 | |
| 527 | if (pcm_pdata && pcm_pdata->cfg_gpio && pcm_pdata->cfg_gpio(pdev)) { |
| 528 | dev_err(&pdev->dev, "Unable to configure gpio\n"); |
| 529 | return -EINVAL; |
| 530 | } |
| 531 | |
| 532 | pcm = &s3c_pcm[pdev->id]; |
| 533 | pcm->dev = &pdev->dev; |
| 534 | |
| 535 | spin_lock_init(&pcm->lock); |
| 536 | |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 537 | /* Default is 128fs */ |
| 538 | pcm->sclk_per_fs = 128; |
| 539 | |
| 540 | pcm->cclk = clk_get(&pdev->dev, "audio-bus"); |
| 541 | if (IS_ERR(pcm->cclk)) { |
| 542 | dev_err(&pdev->dev, "failed to get audio-bus\n"); |
| 543 | ret = PTR_ERR(pcm->cclk); |
| 544 | goto err1; |
| 545 | } |
| 546 | clk_enable(pcm->cclk); |
| 547 | |
| 548 | /* record our pcm structure for later use in the callbacks */ |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 549 | dev_set_drvdata(&pdev->dev, pcm); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 550 | |
| 551 | if (!request_mem_region(mem_res->start, |
| 552 | resource_size(mem_res), "samsung-pcm")) { |
| 553 | dev_err(&pdev->dev, "Unable to request register region\n"); |
| 554 | ret = -EBUSY; |
| 555 | goto err2; |
| 556 | } |
| 557 | |
| 558 | pcm->regs = ioremap(mem_res->start, 0x100); |
| 559 | if (pcm->regs == NULL) { |
| 560 | dev_err(&pdev->dev, "cannot ioremap registers\n"); |
| 561 | ret = -ENXIO; |
| 562 | goto err3; |
| 563 | } |
| 564 | |
| 565 | pcm->pclk = clk_get(&pdev->dev, "pcm"); |
| 566 | if (IS_ERR(pcm->pclk)) { |
| 567 | dev_err(&pdev->dev, "failed to get pcm_clock\n"); |
| 568 | ret = -ENOENT; |
| 569 | goto err4; |
| 570 | } |
| 571 | clk_enable(pcm->pclk); |
| 572 | |
Jassi Brar | 12280fa | 2010-09-10 16:41:05 +0900 | [diff] [blame] | 573 | ret = snd_soc_register_dai(&pdev->dev, &s3c_pcm_dai[pdev->id]); |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 574 | if (ret != 0) { |
| 575 | dev_err(&pdev->dev, "failed to get pcm_clock\n"); |
| 576 | goto err5; |
| 577 | } |
| 578 | |
| 579 | s3c_pcm_stereo_in[pdev->id].dma_addr = mem_res->start |
| 580 | + S3C_PCM_RXFIFO; |
| 581 | s3c_pcm_stereo_out[pdev->id].dma_addr = mem_res->start |
| 582 | + S3C_PCM_TXFIFO; |
| 583 | |
| 584 | s3c_pcm_stereo_in[pdev->id].channel = dmarx_res->start; |
| 585 | s3c_pcm_stereo_out[pdev->id].channel = dmatx_res->start; |
| 586 | |
| 587 | pcm->dma_capture = &s3c_pcm_stereo_in[pdev->id]; |
| 588 | pcm->dma_playback = &s3c_pcm_stereo_out[pdev->id]; |
| 589 | |
| 590 | return 0; |
| 591 | |
| 592 | err5: |
| 593 | clk_disable(pcm->pclk); |
| 594 | clk_put(pcm->pclk); |
| 595 | err4: |
| 596 | iounmap(pcm->regs); |
| 597 | err3: |
| 598 | release_mem_region(mem_res->start, resource_size(mem_res)); |
| 599 | err2: |
| 600 | clk_disable(pcm->cclk); |
| 601 | clk_put(pcm->cclk); |
| 602 | err1: |
| 603 | return ret; |
| 604 | } |
| 605 | |
| 606 | static __devexit int s3c_pcm_dev_remove(struct platform_device *pdev) |
| 607 | { |
| 608 | struct s3c_pcm_info *pcm = &s3c_pcm[pdev->id]; |
| 609 | struct resource *mem_res; |
| 610 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 611 | snd_soc_unregister_dai(&pdev->dev); |
| 612 | |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 613 | iounmap(pcm->regs); |
| 614 | |
| 615 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 616 | release_mem_region(mem_res->start, resource_size(mem_res)); |
| 617 | |
| 618 | clk_disable(pcm->cclk); |
| 619 | clk_disable(pcm->pclk); |
| 620 | clk_put(pcm->pclk); |
| 621 | clk_put(pcm->cclk); |
| 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | static struct platform_driver s3c_pcm_driver = { |
| 627 | .probe = s3c_pcm_dev_probe, |
Axel Lin | c4c5839 | 2011-10-02 11:20:13 +0800 | [diff] [blame] | 628 | .remove = __devexit_p(s3c_pcm_dev_remove), |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 629 | .driver = { |
Jassi Brar | 5fbdedf | 2010-09-10 16:41:17 +0900 | [diff] [blame] | 630 | .name = "samsung-pcm", |
Jassi Brar | 357a1db | 2009-11-17 16:54:03 +0900 | [diff] [blame] | 631 | .owner = THIS_MODULE, |
| 632 | }, |
| 633 | }; |
| 634 | |
| 635 | static int __init s3c_pcm_init(void) |
| 636 | { |
| 637 | return platform_driver_register(&s3c_pcm_driver); |
| 638 | } |
| 639 | module_init(s3c_pcm_init); |
| 640 | |
| 641 | static void __exit s3c_pcm_exit(void) |
| 642 | { |
| 643 | platform_driver_unregister(&s3c_pcm_driver); |
| 644 | } |
| 645 | module_exit(s3c_pcm_exit); |
| 646 | |
| 647 | /* Module information */ |
| 648 | MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>"); |
| 649 | MODULE_DESCRIPTION("S3C PCM Controller Driver"); |
| 650 | MODULE_LICENSE("GPL"); |
Jassi Brar | 5fbdedf | 2010-09-10 16:41:17 +0900 | [diff] [blame] | 651 | MODULE_ALIAS("platform:samsung-pcm"); |