Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 1 | /* |
Stephen Warren | ef280d3 | 2012-04-05 15:54:53 -0600 | [diff] [blame] | 2 | * tegra20_spdif.c - Tegra20 SPDIF driver |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 3 | * |
| 4 | * Author: Stephen Warren <swarren@nvidia.com> |
Stephen Warren | 518de86 | 2012-03-20 14:55:49 -0600 | [diff] [blame] | 5 | * Copyright (C) 2011-2012 - NVIDIA, Inc. |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * version 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 19 | * 02110-1301 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <linux/clk.h> |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 24 | #include <linux/device.h> |
Stephen Warren | 7613c50 | 2012-04-06 11:12:25 -0600 | [diff] [blame] | 25 | #include <linux/io.h> |
| 26 | #include <linux/module.h> |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 27 | #include <linux/platform_device.h> |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 28 | #include <linux/pm_runtime.h> |
Stephen Warren | 5939ae7 | 2012-04-13 12:14:07 -0600 | [diff] [blame] | 29 | #include <linux/regmap.h> |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 30 | #include <linux/slab.h> |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 31 | #include <sound/core.h> |
| 32 | #include <sound/pcm.h> |
| 33 | #include <sound/pcm_params.h> |
| 34 | #include <sound/soc.h> |
| 35 | |
Stephen Warren | ef280d3 | 2012-04-05 15:54:53 -0600 | [diff] [blame] | 36 | #include "tegra20_spdif.h" |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 37 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 38 | #define DRV_NAME "tegra20-spdif" |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 39 | |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 40 | static int tegra20_spdif_runtime_suspend(struct device *dev) |
| 41 | { |
| 42 | struct tegra20_spdif *spdif = dev_get_drvdata(dev); |
| 43 | |
Prashant Gaikwad | 65d2bdd | 2012-06-05 09:59:42 +0530 | [diff] [blame] | 44 | clk_disable_unprepare(spdif->clk_spdif_out); |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | static int tegra20_spdif_runtime_resume(struct device *dev) |
| 50 | { |
| 51 | struct tegra20_spdif *spdif = dev_get_drvdata(dev); |
| 52 | int ret; |
| 53 | |
Prashant Gaikwad | 65d2bdd | 2012-06-05 09:59:42 +0530 | [diff] [blame] | 54 | ret = clk_prepare_enable(spdif->clk_spdif_out); |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 55 | if (ret) { |
| 56 | dev_err(dev, "clk_enable failed: %d\n", ret); |
| 57 | return ret; |
| 58 | } |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 63 | static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream, |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 64 | struct snd_pcm_hw_params *params, |
| 65 | struct snd_soc_dai *dai) |
| 66 | { |
Stephen Warren | c92a40e | 2012-06-06 17:15:05 -0600 | [diff] [blame] | 67 | struct device *dev = dai->dev; |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 68 | struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai); |
Stephen Warren | 0f16354 | 2012-06-06 17:15:06 -0600 | [diff] [blame] | 69 | unsigned int mask, val; |
Axel Lin | 4b8713f | 2011-10-02 21:07:02 +0800 | [diff] [blame] | 70 | int ret, spdifclock; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 71 | |
Stephen Warren | 0f16354 | 2012-06-06 17:15:06 -0600 | [diff] [blame] | 72 | mask = TEGRA20_SPDIF_CTRL_PACK | |
| 73 | TEGRA20_SPDIF_CTRL_BIT_MODE_MASK; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 74 | switch (params_format(params)) { |
| 75 | case SNDRV_PCM_FORMAT_S16_LE: |
Stephen Warren | 0f16354 | 2012-06-06 17:15:06 -0600 | [diff] [blame] | 76 | val = TEGRA20_SPDIF_CTRL_PACK | |
| 77 | TEGRA20_SPDIF_CTRL_BIT_MODE_16BIT; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 78 | break; |
| 79 | default: |
| 80 | return -EINVAL; |
| 81 | } |
| 82 | |
Stephen Warren | 0f16354 | 2012-06-06 17:15:06 -0600 | [diff] [blame] | 83 | regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, mask, val); |
| 84 | |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 85 | switch (params_rate(params)) { |
| 86 | case 32000: |
| 87 | spdifclock = 4096000; |
| 88 | break; |
| 89 | case 44100: |
| 90 | spdifclock = 5644800; |
| 91 | break; |
| 92 | case 48000: |
| 93 | spdifclock = 6144000; |
| 94 | break; |
| 95 | case 88200: |
| 96 | spdifclock = 11289600; |
| 97 | break; |
| 98 | case 96000: |
| 99 | spdifclock = 12288000; |
| 100 | break; |
| 101 | case 176400: |
| 102 | spdifclock = 22579200; |
| 103 | break; |
| 104 | case 192000: |
| 105 | spdifclock = 24576000; |
| 106 | break; |
| 107 | default: |
| 108 | return -EINVAL; |
| 109 | } |
| 110 | |
| 111 | ret = clk_set_rate(spdif->clk_spdif_out, spdifclock); |
| 112 | if (ret) { |
| 113 | dev_err(dev, "Can't set SPDIF clock rate: %d\n", ret); |
| 114 | return ret; |
| 115 | } |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 120 | static void tegra20_spdif_start_playback(struct tegra20_spdif *spdif) |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 121 | { |
Stephen Warren | 0f16354 | 2012-06-06 17:15:06 -0600 | [diff] [blame] | 122 | regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, |
| 123 | TEGRA20_SPDIF_CTRL_TX_EN, |
| 124 | TEGRA20_SPDIF_CTRL_TX_EN); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 125 | } |
| 126 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 127 | static void tegra20_spdif_stop_playback(struct tegra20_spdif *spdif) |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 128 | { |
Stephen Warren | 0f16354 | 2012-06-06 17:15:06 -0600 | [diff] [blame] | 129 | regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, |
| 130 | TEGRA20_SPDIF_CTRL_TX_EN, 0); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 131 | } |
| 132 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 133 | static int tegra20_spdif_trigger(struct snd_pcm_substream *substream, int cmd, |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 134 | struct snd_soc_dai *dai) |
| 135 | { |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 136 | struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 137 | |
| 138 | switch (cmd) { |
| 139 | case SNDRV_PCM_TRIGGER_START: |
| 140 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 141 | case SNDRV_PCM_TRIGGER_RESUME: |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 142 | tegra20_spdif_start_playback(spdif); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 143 | break; |
| 144 | case SNDRV_PCM_TRIGGER_STOP: |
| 145 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 146 | case SNDRV_PCM_TRIGGER_SUSPEND: |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 147 | tegra20_spdif_stop_playback(spdif); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 148 | break; |
| 149 | default: |
| 150 | return -EINVAL; |
| 151 | } |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 156 | static int tegra20_spdif_probe(struct snd_soc_dai *dai) |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 157 | { |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 158 | struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 159 | |
| 160 | dai->capture_dma_data = NULL; |
| 161 | dai->playback_dma_data = &spdif->playback_dma_data; |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 166 | static const struct snd_soc_dai_ops tegra20_spdif_dai_ops = { |
| 167 | .hw_params = tegra20_spdif_hw_params, |
| 168 | .trigger = tegra20_spdif_trigger, |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 169 | }; |
| 170 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 171 | static struct snd_soc_dai_driver tegra20_spdif_dai = { |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 172 | .name = DRV_NAME, |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 173 | .probe = tegra20_spdif_probe, |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 174 | .playback = { |
Stephen Warren | 9515c10 | 2012-06-06 17:15:07 -0600 | [diff] [blame] | 175 | .stream_name = "Playback", |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 176 | .channels_min = 2, |
| 177 | .channels_max = 2, |
| 178 | .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | |
| 179 | SNDRV_PCM_RATE_48000, |
| 180 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 181 | }, |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 182 | .ops = &tegra20_spdif_dai_ops, |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 183 | }; |
| 184 | |
Stephen Warren | 5939ae7 | 2012-04-13 12:14:07 -0600 | [diff] [blame] | 185 | static bool tegra20_spdif_wr_rd_reg(struct device *dev, unsigned int reg) |
| 186 | { |
| 187 | switch (reg) { |
| 188 | case TEGRA20_SPDIF_CTRL: |
| 189 | case TEGRA20_SPDIF_STATUS: |
| 190 | case TEGRA20_SPDIF_STROBE_CTRL: |
| 191 | case TEGRA20_SPDIF_DATA_FIFO_CSR: |
| 192 | case TEGRA20_SPDIF_DATA_OUT: |
| 193 | case TEGRA20_SPDIF_DATA_IN: |
| 194 | case TEGRA20_SPDIF_CH_STA_RX_A: |
| 195 | case TEGRA20_SPDIF_CH_STA_RX_B: |
| 196 | case TEGRA20_SPDIF_CH_STA_RX_C: |
| 197 | case TEGRA20_SPDIF_CH_STA_RX_D: |
| 198 | case TEGRA20_SPDIF_CH_STA_RX_E: |
| 199 | case TEGRA20_SPDIF_CH_STA_RX_F: |
| 200 | case TEGRA20_SPDIF_CH_STA_TX_A: |
| 201 | case TEGRA20_SPDIF_CH_STA_TX_B: |
| 202 | case TEGRA20_SPDIF_CH_STA_TX_C: |
| 203 | case TEGRA20_SPDIF_CH_STA_TX_D: |
| 204 | case TEGRA20_SPDIF_CH_STA_TX_E: |
| 205 | case TEGRA20_SPDIF_CH_STA_TX_F: |
| 206 | case TEGRA20_SPDIF_USR_STA_RX_A: |
| 207 | case TEGRA20_SPDIF_USR_DAT_TX_A: |
| 208 | return true; |
| 209 | default: |
| 210 | return false; |
| 211 | }; |
| 212 | } |
| 213 | |
| 214 | static bool tegra20_spdif_volatile_reg(struct device *dev, unsigned int reg) |
| 215 | { |
| 216 | switch (reg) { |
| 217 | case TEGRA20_SPDIF_STATUS: |
| 218 | case TEGRA20_SPDIF_DATA_FIFO_CSR: |
| 219 | case TEGRA20_SPDIF_DATA_OUT: |
| 220 | case TEGRA20_SPDIF_DATA_IN: |
| 221 | case TEGRA20_SPDIF_CH_STA_RX_A: |
| 222 | case TEGRA20_SPDIF_CH_STA_RX_B: |
| 223 | case TEGRA20_SPDIF_CH_STA_RX_C: |
| 224 | case TEGRA20_SPDIF_CH_STA_RX_D: |
| 225 | case TEGRA20_SPDIF_CH_STA_RX_E: |
| 226 | case TEGRA20_SPDIF_CH_STA_RX_F: |
| 227 | case TEGRA20_SPDIF_USR_STA_RX_A: |
| 228 | case TEGRA20_SPDIF_USR_DAT_TX_A: |
| 229 | return true; |
| 230 | default: |
| 231 | return false; |
| 232 | }; |
| 233 | } |
| 234 | |
| 235 | static bool tegra20_spdif_precious_reg(struct device *dev, unsigned int reg) |
| 236 | { |
| 237 | switch (reg) { |
| 238 | case TEGRA20_SPDIF_DATA_OUT: |
| 239 | case TEGRA20_SPDIF_DATA_IN: |
| 240 | case TEGRA20_SPDIF_USR_STA_RX_A: |
| 241 | case TEGRA20_SPDIF_USR_DAT_TX_A: |
| 242 | return true; |
| 243 | default: |
| 244 | return false; |
| 245 | }; |
| 246 | } |
| 247 | |
| 248 | static const struct regmap_config tegra20_spdif_regmap_config = { |
| 249 | .reg_bits = 32, |
| 250 | .reg_stride = 4, |
| 251 | .val_bits = 32, |
| 252 | .max_register = TEGRA20_SPDIF_USR_DAT_TX_A, |
| 253 | .writeable_reg = tegra20_spdif_wr_rd_reg, |
| 254 | .readable_reg = tegra20_spdif_wr_rd_reg, |
| 255 | .volatile_reg = tegra20_spdif_volatile_reg, |
| 256 | .precious_reg = tegra20_spdif_precious_reg, |
| 257 | .cache_type = REGCACHE_RBTREE, |
| 258 | }; |
| 259 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 260 | static __devinit int tegra20_spdif_platform_probe(struct platform_device *pdev) |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 261 | { |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 262 | struct tegra20_spdif *spdif; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 263 | struct resource *mem, *memregion, *dmareq; |
Stephen Warren | 5939ae7 | 2012-04-13 12:14:07 -0600 | [diff] [blame] | 264 | void __iomem *regs; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 265 | int ret; |
| 266 | |
Stephen Warren | 17933db | 2012-04-06 11:14:04 -0600 | [diff] [blame] | 267 | spdif = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_spdif), |
| 268 | GFP_KERNEL); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 269 | if (!spdif) { |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 270 | dev_err(&pdev->dev, "Can't allocate tegra20_spdif\n"); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 271 | ret = -ENOMEM; |
Stephen Warren | 17933db | 2012-04-06 11:14:04 -0600 | [diff] [blame] | 272 | goto err; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 273 | } |
| 274 | dev_set_drvdata(&pdev->dev, spdif); |
| 275 | |
| 276 | spdif->clk_spdif_out = clk_get(&pdev->dev, "spdif_out"); |
| 277 | if (IS_ERR(spdif->clk_spdif_out)) { |
| 278 | pr_err("Can't retrieve spdif clock\n"); |
| 279 | ret = PTR_ERR(spdif->clk_spdif_out); |
Stephen Warren | 17933db | 2012-04-06 11:14:04 -0600 | [diff] [blame] | 280 | goto err; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 284 | if (!mem) { |
| 285 | dev_err(&pdev->dev, "No memory resource\n"); |
| 286 | ret = -ENODEV; |
| 287 | goto err_clk_put; |
| 288 | } |
| 289 | |
| 290 | dmareq = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 291 | if (!dmareq) { |
| 292 | dev_err(&pdev->dev, "No DMA resource\n"); |
| 293 | ret = -ENODEV; |
| 294 | goto err_clk_put; |
| 295 | } |
| 296 | |
Stephen Warren | 17933db | 2012-04-06 11:14:04 -0600 | [diff] [blame] | 297 | memregion = devm_request_mem_region(&pdev->dev, mem->start, |
| 298 | resource_size(mem), DRV_NAME); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 299 | if (!memregion) { |
| 300 | dev_err(&pdev->dev, "Memory region already claimed\n"); |
| 301 | ret = -EBUSY; |
| 302 | goto err_clk_put; |
| 303 | } |
| 304 | |
Stephen Warren | 5939ae7 | 2012-04-13 12:14:07 -0600 | [diff] [blame] | 305 | regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); |
| 306 | if (!regs) { |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 307 | dev_err(&pdev->dev, "ioremap failed\n"); |
| 308 | ret = -ENOMEM; |
Stephen Warren | 17933db | 2012-04-06 11:14:04 -0600 | [diff] [blame] | 309 | goto err_clk_put; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 310 | } |
| 311 | |
Stephen Warren | 5939ae7 | 2012-04-13 12:14:07 -0600 | [diff] [blame] | 312 | spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs, |
| 313 | &tegra20_spdif_regmap_config); |
| 314 | if (IS_ERR(spdif->regmap)) { |
| 315 | dev_err(&pdev->dev, "regmap init failed\n"); |
| 316 | ret = PTR_ERR(spdif->regmap); |
| 317 | goto err_clk_put; |
| 318 | } |
| 319 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 320 | spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 321 | spdif->playback_dma_data.wrap = 4; |
| 322 | spdif->playback_dma_data.width = 32; |
| 323 | spdif->playback_dma_data.req_sel = dmareq->start; |
| 324 | |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 325 | pm_runtime_enable(&pdev->dev); |
| 326 | if (!pm_runtime_enabled(&pdev->dev)) { |
| 327 | ret = tegra20_spdif_runtime_resume(&pdev->dev); |
| 328 | if (ret) |
| 329 | goto err_pm_disable; |
| 330 | } |
| 331 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 332 | ret = snd_soc_register_dai(&pdev->dev, &tegra20_spdif_dai); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 333 | if (ret) { |
| 334 | dev_err(&pdev->dev, "Could not register DAI: %d\n", ret); |
| 335 | ret = -ENOMEM; |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 336 | goto err_suspend; |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 337 | } |
| 338 | |
Stephen Warren | 518de86 | 2012-03-20 14:55:49 -0600 | [diff] [blame] | 339 | ret = tegra_pcm_platform_register(&pdev->dev); |
| 340 | if (ret) { |
| 341 | dev_err(&pdev->dev, "Could not register PCM: %d\n", ret); |
| 342 | goto err_unregister_dai; |
| 343 | } |
| 344 | |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 345 | return 0; |
| 346 | |
Stephen Warren | 518de86 | 2012-03-20 14:55:49 -0600 | [diff] [blame] | 347 | err_unregister_dai: |
| 348 | snd_soc_unregister_dai(&pdev->dev); |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 349 | err_suspend: |
| 350 | if (!pm_runtime_status_suspended(&pdev->dev)) |
| 351 | tegra20_spdif_runtime_suspend(&pdev->dev); |
| 352 | err_pm_disable: |
| 353 | pm_runtime_disable(&pdev->dev); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 354 | err_clk_put: |
| 355 | clk_put(spdif->clk_spdif_out); |
Stephen Warren | 17933db | 2012-04-06 11:14:04 -0600 | [diff] [blame] | 356 | err: |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 357 | return ret; |
| 358 | } |
| 359 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 360 | static int __devexit tegra20_spdif_platform_remove(struct platform_device *pdev) |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 361 | { |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 362 | struct tegra20_spdif *spdif = dev_get_drvdata(&pdev->dev); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 363 | |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 364 | pm_runtime_disable(&pdev->dev); |
| 365 | if (!pm_runtime_status_suspended(&pdev->dev)) |
| 366 | tegra20_spdif_runtime_suspend(&pdev->dev); |
| 367 | |
Stephen Warren | 518de86 | 2012-03-20 14:55:49 -0600 | [diff] [blame] | 368 | tegra_pcm_platform_unregister(&pdev->dev); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 369 | snd_soc_unregister_dai(&pdev->dev); |
| 370 | |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 371 | clk_put(spdif->clk_spdif_out); |
| 372 | |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 373 | return 0; |
| 374 | } |
| 375 | |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 376 | static const struct dev_pm_ops tegra20_spdif_pm_ops __devinitconst = { |
| 377 | SET_RUNTIME_PM_OPS(tegra20_spdif_runtime_suspend, |
| 378 | tegra20_spdif_runtime_resume, NULL) |
| 379 | }; |
| 380 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 381 | static struct platform_driver tegra20_spdif_driver = { |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 382 | .driver = { |
| 383 | .name = DRV_NAME, |
| 384 | .owner = THIS_MODULE, |
Stephen Warren | 82ef0ae | 2012-04-09 09:52:22 -0600 | [diff] [blame] | 385 | .pm = &tegra20_spdif_pm_ops, |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 386 | }, |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 387 | .probe = tegra20_spdif_platform_probe, |
| 388 | .remove = __devexit_p(tegra20_spdif_platform_remove), |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 389 | }; |
| 390 | |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 391 | module_platform_driver(tegra20_spdif_driver); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 392 | |
| 393 | MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); |
Stephen Warren | 896637a | 2012-04-06 10:30:52 -0600 | [diff] [blame] | 394 | MODULE_DESCRIPTION("Tegra20 SPDIF ASoC driver"); |
Stephen Warren | 774fec3 | 2011-07-05 10:55:27 -0600 | [diff] [blame] | 395 | MODULE_LICENSE("GPL"); |
| 396 | MODULE_ALIAS("platform:" DRV_NAME); |