1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. 4 * 5 * Author: Nicolas Pitre 6 * Created: Dec 02, 2004 7 * Copyright: MontaVista Software Inc. 8 */ 9 10 #include <linux/init.h> 11 #include <linux/io.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include <linux/dmaengine.h> 15 #include <linux/dma-mapping.h> 16 17 #include <sound/core.h> 18 #include <sound/pcm.h> 19 #include <sound/ac97_codec.h> 20 #include <sound/initval.h> 21 #include <sound/pxa2xx-lib.h> 22 #include <sound/dmaengine_pcm.h> 23 24 #include <linux/platform_data/asoc-pxa.h> 25 26 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97) 27 { 28 if (!pxa2xx_ac97_try_cold_reset()) 29 pxa2xx_ac97_try_warm_reset(); 30 31 pxa2xx_ac97_finish_reset(); 32 } 33 34 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, 35 unsigned short reg) 36 { 37 int ret; 38 39 ret = pxa2xx_ac97_read(ac97->num, reg); 40 if (ret < 0) 41 return 0; 42 else 43 return (unsigned short)(ret & 0xffff); 44 } 45 46 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, 47 unsigned short reg, unsigned short val) 48 { 49 pxa2xx_ac97_write(ac97->num, reg, val); 50 } 51 52 static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 53 .read = pxa2xx_ac97_legacy_read, 54 .write = pxa2xx_ac97_legacy_write, 55 .reset = pxa2xx_ac97_legacy_reset, 56 }; 57 58 static struct snd_pcm *pxa2xx_ac97_pcm; 59 static struct snd_ac97 *pxa2xx_ac97_ac97; 60 61 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream) 62 { 63 struct snd_pcm_runtime *runtime = substream->runtime; 64 pxa2xx_audio_ops_t *platform_ops; 65 int ret, i; 66 67 ret = pxa2xx_pcm_open(substream); 68 if (ret) 69 return ret; 70 71 runtime->hw.channels_min = 2; 72 runtime->hw.channels_max = 2; 73 74 i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 75 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 76 runtime->hw.rates = pxa2xx_ac97_ac97->rates[i]; 77 snd_pcm_limit_hw_rates(runtime); 78 79 platform_ops = substream->pcm->card->dev->platform_data; 80 if (platform_ops && platform_ops->startup) { 81 ret = platform_ops->startup(substream, platform_ops->priv); 82 if (ret < 0) 83 pxa2xx_pcm_close(substream); 84 } 85 86 return ret; 87 } 88 89 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream) 90 { 91 pxa2xx_audio_ops_t *platform_ops; 92 93 platform_ops = substream->pcm->card->dev->platform_data; 94 if (platform_ops && platform_ops->shutdown) 95 platform_ops->shutdown(substream, platform_ops->priv); 96 97 return 0; 98 } 99 100 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 101 { 102 struct snd_pcm_runtime *runtime = substream->runtime; 103 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 104 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 105 int ret; 106 107 ret = pxa2xx_pcm_prepare(substream); 108 if (ret < 0) 109 return ret; 110 111 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 112 } 113 114 static int pxa2xx_ac97_do_suspend(struct snd_card *card) 115 { 116 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 117 118 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 119 snd_ac97_suspend(pxa2xx_ac97_ac97); 120 if (platform_ops && platform_ops->suspend) 121 platform_ops->suspend(platform_ops->priv); 122 123 return pxa2xx_ac97_hw_suspend(); 124 } 125 126 static int pxa2xx_ac97_do_resume(struct snd_card *card) 127 { 128 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 129 int rc; 130 131 rc = pxa2xx_ac97_hw_resume(); 132 if (rc) 133 return rc; 134 135 if (platform_ops && platform_ops->resume) 136 platform_ops->resume(platform_ops->priv); 137 snd_ac97_resume(pxa2xx_ac97_ac97); 138 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 139 140 return 0; 141 } 142 143 static int pxa2xx_ac97_suspend(struct device *dev) 144 { 145 struct snd_card *card = dev_get_drvdata(dev); 146 int ret = 0; 147 148 if (card) 149 ret = pxa2xx_ac97_do_suspend(card); 150 151 return ret; 152 } 153 154 static int pxa2xx_ac97_resume(struct device *dev) 155 { 156 struct snd_card *card = dev_get_drvdata(dev); 157 int ret = 0; 158 159 if (card) 160 ret = pxa2xx_ac97_do_resume(card); 161 162 return ret; 163 } 164 165 static DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 166 167 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = { 168 .open = pxa2xx_ac97_pcm_open, 169 .close = pxa2xx_ac97_pcm_close, 170 .hw_params = pxa2xx_pcm_hw_params, 171 .prepare = pxa2xx_ac97_pcm_prepare, 172 .trigger = pxa2xx_pcm_trigger, 173 .pointer = pxa2xx_pcm_pointer, 174 }; 175 176 177 static int pxa2xx_ac97_pcm_new(struct snd_card *card) 178 { 179 struct snd_pcm *pcm; 180 int ret; 181 182 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); 183 if (ret) 184 goto out; 185 186 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 187 if (ret) 188 goto out; 189 190 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops); 191 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops); 192 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm); 193 if (ret) 194 goto out; 195 196 pxa2xx_ac97_pcm = pcm; 197 ret = 0; 198 199 out: 200 return ret; 201 } 202 203 static int pxa2xx_ac97_probe(struct platform_device *dev) 204 { 205 struct snd_card *card; 206 struct snd_ac97_bus *ac97_bus; 207 struct snd_ac97_template ac97_template; 208 int ret; 209 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 210 211 if (dev->id >= 0) { 212 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 213 ret = -ENXIO; 214 goto err_dev; 215 } 216 217 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 218 THIS_MODULE, 0, &card); 219 if (ret < 0) 220 goto err; 221 222 strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 223 224 ret = pxa2xx_ac97_pcm_new(card); 225 if (ret) 226 goto err; 227 228 ret = pxa2xx_ac97_hw_probe(dev); 229 if (ret) 230 goto err; 231 232 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 233 if (ret) 234 goto err_remove; 235 memset(&ac97_template, 0, sizeof(ac97_template)); 236 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 237 if (ret) 238 goto err_remove; 239 240 snprintf(card->shortname, sizeof(card->shortname), 241 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 242 snprintf(card->longname, sizeof(card->longname), 243 "%s (%s)", dev->dev.driver->name, card->mixername); 244 245 if (pdata && pdata->codec_pdata[0]) 246 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 247 ret = snd_card_register(card); 248 if (ret == 0) { 249 platform_set_drvdata(dev, card); 250 return 0; 251 } 252 253 err_remove: 254 pxa2xx_ac97_hw_remove(dev); 255 err: 256 if (card) 257 snd_card_free(card); 258 err_dev: 259 return ret; 260 } 261 262 static void pxa2xx_ac97_remove(struct platform_device *dev) 263 { 264 struct snd_card *card = platform_get_drvdata(dev); 265 266 if (card) { 267 snd_card_free(card); 268 pxa2xx_ac97_hw_remove(dev); 269 } 270 } 271 272 static struct platform_driver pxa2xx_ac97_driver = { 273 .probe = pxa2xx_ac97_probe, 274 .remove_new = pxa2xx_ac97_remove, 275 .driver = { 276 .name = "pxa2xx-ac97", 277 .pm = &pxa2xx_ac97_pm_ops, 278 }, 279 }; 280 281 module_platform_driver(pxa2xx_ac97_driver); 282 283 MODULE_AUTHOR("Nicolas Pitre"); 284 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 285 MODULE_LICENSE("GPL"); 286 MODULE_ALIAS("platform:pxa2xx-ac97"); 287