Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Freescale ALSA SoC Digital Audio Interface (SAI) driver. |
| 3 | * |
| 4 | * Copyright 2012-2013 Freescale Semiconductor, Inc. |
| 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 as published by the |
| 8 | * Free Software Foundation, either version 2 of the License, or(at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/clk.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/dmaengine.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/of_address.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <sound/core.h> |
| 20 | #include <sound/dmaengine_pcm.h> |
| 21 | #include <sound/pcm_params.h> |
| 22 | |
| 23 | #include "fsl_sai.h" |
| 24 | |
| 25 | static inline u32 sai_readl(struct fsl_sai *sai, |
| 26 | const void __iomem *addr) |
| 27 | { |
| 28 | u32 val; |
| 29 | |
| 30 | val = __raw_readl(addr); |
| 31 | |
| 32 | if (likely(sai->big_endian_regs)) |
| 33 | val = be32_to_cpu(val); |
| 34 | else |
| 35 | val = le32_to_cpu(val); |
| 36 | rmb(); |
| 37 | |
| 38 | return val; |
| 39 | } |
| 40 | |
| 41 | static inline void sai_writel(struct fsl_sai *sai, |
| 42 | u32 val, void __iomem *addr) |
| 43 | { |
| 44 | wmb(); |
| 45 | if (likely(sai->big_endian_regs)) |
| 46 | val = cpu_to_be32(val); |
| 47 | else |
| 48 | val = cpu_to_le32(val); |
| 49 | |
| 50 | __raw_writel(val, addr); |
| 51 | } |
| 52 | |
| 53 | static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai, |
| 54 | int clk_id, unsigned int freq, int fsl_dir) |
| 55 | { |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 56 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Nicolin Chen | 4e3a99f | 2013-12-20 16:41:05 +0800 | [diff] [blame] | 57 | u32 val_cr2, reg_cr2; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 58 | |
| 59 | if (fsl_dir == FSL_FMT_TRANSMITTER) |
| 60 | reg_cr2 = FSL_SAI_TCR2; |
| 61 | else |
| 62 | reg_cr2 = FSL_SAI_RCR2; |
| 63 | |
| 64 | val_cr2 = sai_readl(sai, sai->base + reg_cr2); |
| 65 | switch (clk_id) { |
| 66 | case FSL_SAI_CLK_BUS: |
| 67 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 68 | val_cr2 |= FSL_SAI_CR2_MSEL_BUS; |
| 69 | break; |
| 70 | case FSL_SAI_CLK_MAST1: |
| 71 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 72 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1; |
| 73 | break; |
| 74 | case FSL_SAI_CLK_MAST2: |
| 75 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 76 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2; |
| 77 | break; |
| 78 | case FSL_SAI_CLK_MAST3: |
| 79 | val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK; |
| 80 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3; |
| 81 | break; |
| 82 | default: |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | sai_writel(sai, val_cr2, sai->base + reg_cr2); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, |
| 91 | int clk_id, unsigned int freq, int dir) |
| 92 | { |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 93 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Nicolin Chen | 4e3a99f | 2013-12-20 16:41:05 +0800 | [diff] [blame] | 94 | int ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 95 | |
| 96 | if (dir == SND_SOC_CLOCK_IN) |
| 97 | return 0; |
| 98 | |
| 99 | ret = clk_prepare_enable(sai->clk); |
| 100 | if (ret) |
| 101 | return ret; |
| 102 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 103 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
| 104 | FSL_FMT_TRANSMITTER); |
| 105 | if (ret) { |
Nicolin Chen | 190af12 | 2013-12-20 16:41:04 +0800 | [diff] [blame] | 106 | dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n", ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 107 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
| 111 | FSL_FMT_RECEIVER); |
| 112 | if (ret) { |
Nicolin Chen | 190af12 | 2013-12-20 16:41:04 +0800 | [diff] [blame] | 113 | dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n", ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 114 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 115 | } |
| 116 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 117 | err_clk: |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 118 | clk_disable_unprepare(sai->clk); |
| 119 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 120 | return ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai, |
| 124 | unsigned int fmt, int fsl_dir) |
| 125 | { |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 126 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 127 | u32 val_cr2, val_cr4, reg_cr2, reg_cr4; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 128 | |
| 129 | if (fsl_dir == FSL_FMT_TRANSMITTER) { |
| 130 | reg_cr2 = FSL_SAI_TCR2; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 131 | reg_cr4 = FSL_SAI_TCR4; |
| 132 | } else { |
| 133 | reg_cr2 = FSL_SAI_RCR2; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 134 | reg_cr4 = FSL_SAI_RCR4; |
| 135 | } |
| 136 | |
| 137 | val_cr2 = sai_readl(sai, sai->base + reg_cr2); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 138 | val_cr4 = sai_readl(sai, sai->base + reg_cr4); |
| 139 | |
| 140 | if (sai->big_endian_data) |
| 141 | val_cr4 |= FSL_SAI_CR4_MF; |
| 142 | else |
| 143 | val_cr4 &= ~FSL_SAI_CR4_MF; |
| 144 | |
| 145 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 146 | case SND_SOC_DAIFMT_I2S: |
| 147 | val_cr4 |= FSL_SAI_CR4_FSE; |
| 148 | val_cr4 |= FSL_SAI_CR4_FSP; |
| 149 | break; |
| 150 | default: |
| 151 | return -EINVAL; |
| 152 | } |
| 153 | |
| 154 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 155 | case SND_SOC_DAIFMT_IB_IF: |
| 156 | val_cr4 |= FSL_SAI_CR4_FSP; |
| 157 | val_cr2 &= ~FSL_SAI_CR2_BCP; |
| 158 | break; |
| 159 | case SND_SOC_DAIFMT_IB_NF: |
| 160 | val_cr4 &= ~FSL_SAI_CR4_FSP; |
| 161 | val_cr2 &= ~FSL_SAI_CR2_BCP; |
| 162 | break; |
| 163 | case SND_SOC_DAIFMT_NB_IF: |
| 164 | val_cr4 |= FSL_SAI_CR4_FSP; |
| 165 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 166 | break; |
| 167 | case SND_SOC_DAIFMT_NB_NF: |
| 168 | val_cr4 &= ~FSL_SAI_CR4_FSP; |
| 169 | val_cr2 |= FSL_SAI_CR2_BCP; |
| 170 | break; |
| 171 | default: |
| 172 | return -EINVAL; |
| 173 | } |
| 174 | |
| 175 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 176 | case SND_SOC_DAIFMT_CBS_CFS: |
| 177 | val_cr2 |= FSL_SAI_CR2_BCD_MSTR; |
| 178 | val_cr4 |= FSL_SAI_CR4_FSD_MSTR; |
| 179 | break; |
| 180 | case SND_SOC_DAIFMT_CBM_CFM: |
| 181 | val_cr2 &= ~FSL_SAI_CR2_BCD_MSTR; |
| 182 | val_cr4 &= ~FSL_SAI_CR4_FSD_MSTR; |
| 183 | break; |
| 184 | default: |
| 185 | return -EINVAL; |
| 186 | } |
| 187 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 188 | if (fsl_dir == FSL_FMT_RECEIVER) |
| 189 | val_cr2 |= FSL_SAI_CR2_SYNC; |
| 190 | |
| 191 | sai_writel(sai, val_cr2, sai->base + reg_cr2); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 192 | sai_writel(sai, val_cr4, sai->base + reg_cr4); |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) |
| 198 | { |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 199 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Nicolin Chen | 4e3a99f | 2013-12-20 16:41:05 +0800 | [diff] [blame] | 200 | int ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 201 | |
| 202 | ret = clk_prepare_enable(sai->clk); |
| 203 | if (ret) |
| 204 | return ret; |
| 205 | |
| 206 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_TRANSMITTER); |
| 207 | if (ret) { |
Nicolin Chen | 190af12 | 2013-12-20 16:41:04 +0800 | [diff] [blame] | 208 | dev_err(cpu_dai->dev, "Cannot set tx format: %d\n", ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 209 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_RECEIVER); |
| 213 | if (ret) { |
Nicolin Chen | 190af12 | 2013-12-20 16:41:04 +0800 | [diff] [blame] | 214 | dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret); |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 215 | goto err_clk; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 216 | } |
| 217 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 218 | err_clk: |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 219 | clk_disable_unprepare(sai->clk); |
| 220 | |
Nicolin Chen | 1fb2d9d | 2013-12-20 16:41:00 +0800 | [diff] [blame] | 221 | return ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | static int fsl_sai_hw_params(struct snd_pcm_substream *substream, |
| 225 | struct snd_pcm_hw_params *params, |
| 226 | struct snd_soc_dai *cpu_dai) |
| 227 | { |
Nicolin Chen | 4e3a99f | 2013-12-20 16:41:05 +0800 | [diff] [blame] | 228 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Nicolin Chen | 1d70030 | 2013-12-20 16:41:01 +0800 | [diff] [blame] | 229 | u32 val_cr4, val_cr5, val_mr, reg_cr4, reg_cr5, reg_mr; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 230 | unsigned int channels = params_channels(params); |
Nicolin Chen | 1d70030 | 2013-12-20 16:41:01 +0800 | [diff] [blame] | 231 | u32 word_width = snd_pcm_format_width(params_format(params)); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 232 | |
| 233 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 234 | reg_cr4 = FSL_SAI_TCR4; |
| 235 | reg_cr5 = FSL_SAI_TCR5; |
| 236 | reg_mr = FSL_SAI_TMR; |
| 237 | } else { |
| 238 | reg_cr4 = FSL_SAI_RCR4; |
| 239 | reg_cr5 = FSL_SAI_RCR5; |
| 240 | reg_mr = FSL_SAI_RMR; |
| 241 | } |
| 242 | |
| 243 | val_cr4 = sai_readl(sai, sai->base + reg_cr4); |
| 244 | val_cr4 &= ~FSL_SAI_CR4_SYWD_MASK; |
| 245 | val_cr4 &= ~FSL_SAI_CR4_FRSZ_MASK; |
| 246 | |
| 247 | val_cr5 = sai_readl(sai, sai->base + reg_cr5); |
| 248 | val_cr5 &= ~FSL_SAI_CR5_WNW_MASK; |
| 249 | val_cr5 &= ~FSL_SAI_CR5_W0W_MASK; |
| 250 | val_cr5 &= ~FSL_SAI_CR5_FBT_MASK; |
| 251 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 252 | val_cr4 |= FSL_SAI_CR4_SYWD(word_width); |
| 253 | val_cr5 |= FSL_SAI_CR5_WNW(word_width); |
| 254 | val_cr5 |= FSL_SAI_CR5_W0W(word_width); |
| 255 | |
| 256 | if (sai->big_endian_data) |
| 257 | val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1); |
| 258 | else |
| 259 | val_cr5 |= FSL_SAI_CR5_FBT(0); |
| 260 | |
| 261 | val_cr4 |= FSL_SAI_CR4_FRSZ(channels); |
Nicolin Chen | d22e28c | 2013-12-20 16:41:02 +0800 | [diff] [blame] | 262 | val_mr = ~0UL - ((1 << channels) - 1); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 263 | |
| 264 | sai_writel(sai, val_cr4, sai->base + reg_cr4); |
| 265 | sai_writel(sai, val_cr5, sai->base + reg_cr5); |
| 266 | sai_writel(sai, val_mr, sai->base + reg_mr); |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd, |
| 272 | struct snd_soc_dai *cpu_dai) |
| 273 | { |
| 274 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 275 | u32 tcsr, rcsr, val_cr3, reg_cr3; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 276 | |
| 277 | tcsr = sai_readl(sai, sai->base + FSL_SAI_TCSR); |
| 278 | rcsr = sai_readl(sai, sai->base + FSL_SAI_RCSR); |
| 279 | |
| 280 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 281 | tcsr |= FSL_SAI_CSR_FRDE; |
| 282 | rcsr &= ~FSL_SAI_CSR_FRDE; |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 283 | reg_cr3 = FSL_SAI_TCR3; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 284 | } else { |
| 285 | rcsr |= FSL_SAI_CSR_FRDE; |
| 286 | tcsr &= ~FSL_SAI_CSR_FRDE; |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 287 | reg_cr3 = FSL_SAI_RCR3; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 288 | } |
| 289 | |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 290 | val_cr3 = sai_readl(sai, sai->base + reg_cr3); |
| 291 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 292 | switch (cmd) { |
| 293 | case SNDRV_PCM_TRIGGER_START: |
| 294 | case SNDRV_PCM_TRIGGER_RESUME: |
| 295 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 296 | tcsr |= FSL_SAI_CSR_TERE; |
| 297 | rcsr |= FSL_SAI_CSR_TERE; |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 298 | val_cr3 |= FSL_SAI_CR3_TRCE; |
| 299 | |
| 300 | sai_writel(sai, val_cr3, sai->base + reg_cr3); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 301 | sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR); |
| 302 | sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR); |
| 303 | break; |
| 304 | |
| 305 | case SNDRV_PCM_TRIGGER_STOP: |
| 306 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 307 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 308 | if (!(cpu_dai->playback_active || cpu_dai->capture_active)) { |
| 309 | tcsr &= ~FSL_SAI_CSR_TERE; |
| 310 | rcsr &= ~FSL_SAI_CSR_TERE; |
| 311 | } |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 312 | |
| 313 | val_cr3 &= ~FSL_SAI_CR3_TRCE; |
| 314 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 315 | sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR); |
| 316 | sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR); |
Xiubo Li | e5d0fa9 | 2013-12-25 12:40:04 +0800 | [diff] [blame^] | 317 | sai_writel(sai, val_cr3, sai->base + reg_cr3); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 318 | break; |
| 319 | default: |
| 320 | return -EINVAL; |
| 321 | } |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | static int fsl_sai_startup(struct snd_pcm_substream *substream, |
| 327 | struct snd_soc_dai *cpu_dai) |
| 328 | { |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 329 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 330 | |
Nicolin Chen | 15b29da | 2013-12-20 16:41:03 +0800 | [diff] [blame] | 331 | return clk_prepare_enable(sai->clk); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | static void fsl_sai_shutdown(struct snd_pcm_substream *substream, |
| 335 | struct snd_soc_dai *cpu_dai) |
| 336 | { |
| 337 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| 338 | |
| 339 | clk_disable_unprepare(sai->clk); |
| 340 | } |
| 341 | |
| 342 | static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { |
| 343 | .set_sysclk = fsl_sai_set_dai_sysclk, |
| 344 | .set_fmt = fsl_sai_set_dai_fmt, |
| 345 | .hw_params = fsl_sai_hw_params, |
| 346 | .trigger = fsl_sai_trigger, |
| 347 | .startup = fsl_sai_startup, |
| 348 | .shutdown = fsl_sai_shutdown, |
| 349 | }; |
| 350 | |
| 351 | static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) |
| 352 | { |
| 353 | struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); |
Xiubo Li | e6dc12d | 2013-12-25 11:20:14 +0800 | [diff] [blame] | 354 | int ret; |
| 355 | |
| 356 | ret = clk_prepare_enable(sai->clk); |
| 357 | if (ret) |
| 358 | return ret; |
| 359 | |
| 360 | sai_writel(sai, 0x0, sai->base + FSL_SAI_RCSR); |
| 361 | sai_writel(sai, 0x0, sai->base + FSL_SAI_TCSR); |
| 362 | sai_writel(sai, FSL_SAI_MAXBURST_TX * 2, sai->base + FSL_SAI_TCR1); |
| 363 | sai_writel(sai, FSL_SAI_MAXBURST_RX - 1, sai->base + FSL_SAI_RCR1); |
| 364 | |
| 365 | clk_disable_unprepare(sai->clk); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 366 | |
Xiubo Li | dd9f406 | 2013-12-20 12:35:33 +0800 | [diff] [blame] | 367 | snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx, |
| 368 | &sai->dma_params_rx); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 369 | |
| 370 | snd_soc_dai_set_drvdata(cpu_dai, sai); |
| 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 375 | static struct snd_soc_dai_driver fsl_sai_dai = { |
| 376 | .probe = fsl_sai_dai_probe, |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 377 | .playback = { |
| 378 | .channels_min = 1, |
| 379 | .channels_max = 2, |
| 380 | .rates = SNDRV_PCM_RATE_8000_96000, |
| 381 | .formats = FSL_SAI_FORMATS, |
| 382 | }, |
| 383 | .capture = { |
| 384 | .channels_min = 1, |
| 385 | .channels_max = 2, |
| 386 | .rates = SNDRV_PCM_RATE_8000_96000, |
| 387 | .formats = FSL_SAI_FORMATS, |
| 388 | }, |
| 389 | .ops = &fsl_sai_pcm_dai_ops, |
| 390 | }; |
| 391 | |
| 392 | static const struct snd_soc_component_driver fsl_component = { |
| 393 | .name = "fsl-sai", |
| 394 | }; |
| 395 | |
| 396 | static int fsl_sai_probe(struct platform_device *pdev) |
| 397 | { |
Nicolin Chen | 4e3a99f | 2013-12-20 16:41:05 +0800 | [diff] [blame] | 398 | struct device_node *np = pdev->dev.of_node; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 399 | struct fsl_sai *sai; |
| 400 | struct resource *res; |
Nicolin Chen | 4e3a99f | 2013-12-20 16:41:05 +0800 | [diff] [blame] | 401 | int ret; |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 402 | |
| 403 | sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); |
| 404 | if (!sai) |
| 405 | return -ENOMEM; |
| 406 | |
| 407 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 408 | sai->base = devm_ioremap_resource(&pdev->dev, res); |
| 409 | if (IS_ERR(sai->base)) |
| 410 | return PTR_ERR(sai->base); |
| 411 | |
| 412 | sai->clk = devm_clk_get(&pdev->dev, "sai"); |
| 413 | if (IS_ERR(sai->clk)) { |
| 414 | dev_err(&pdev->dev, "Cannot get SAI's clock\n"); |
| 415 | return PTR_ERR(sai->clk); |
| 416 | } |
| 417 | |
| 418 | sai->dma_params_rx.addr = res->start + FSL_SAI_RDR; |
| 419 | sai->dma_params_tx.addr = res->start + FSL_SAI_TDR; |
| 420 | sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX; |
| 421 | sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX; |
| 422 | |
| 423 | sai->big_endian_regs = of_property_read_bool(np, "big-endian-regs"); |
| 424 | sai->big_endian_data = of_property_read_bool(np, "big-endian-data"); |
| 425 | |
| 426 | platform_set_drvdata(pdev, sai); |
| 427 | |
| 428 | ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, |
| 429 | &fsl_sai_dai, 1); |
| 430 | if (ret) |
| 431 | return ret; |
| 432 | |
Xiubo Li | e5180df3 | 2013-12-20 12:30:26 +0800 | [diff] [blame] | 433 | return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 434 | SND_DMAENGINE_PCM_FLAG_NO_RESIDUE); |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | static const struct of_device_id fsl_sai_ids[] = { |
| 438 | { .compatible = "fsl,vf610-sai", }, |
| 439 | { /* sentinel */ } |
| 440 | }; |
| 441 | |
| 442 | static struct platform_driver fsl_sai_driver = { |
| 443 | .probe = fsl_sai_probe, |
Xiubo Li | 4355082 | 2013-12-17 11:24:38 +0800 | [diff] [blame] | 444 | .driver = { |
| 445 | .name = "fsl-sai", |
| 446 | .owner = THIS_MODULE, |
| 447 | .of_match_table = fsl_sai_ids, |
| 448 | }, |
| 449 | }; |
| 450 | module_platform_driver(fsl_sai_driver); |
| 451 | |
| 452 | MODULE_DESCRIPTION("Freescale Soc SAI Interface"); |
| 453 | MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>"); |
| 454 | MODULE_ALIAS("platform:fsl-sai"); |
| 455 | MODULE_LICENSE("GPL"); |