1 /* 2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. 3 * 4 * Author: Nicolas Pitre 5 * Created: Dec 02, 2004 6 * Copyright: MontaVista Software Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/init.h> 14 #include <linux/io.h> 15 #include <linux/module.h> 16 #include <linux/platform_device.h> 17 #include <linux/dmaengine.h> 18 #include <linux/dma/pxa-dma.h> 19 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/ac97_codec.h> 23 #include <sound/initval.h> 24 #include <sound/pxa2xx-lib.h> 25 #include <sound/dmaengine_pcm.h> 26 27 #include <mach/regs-ac97.h> 28 #include <mach/audio.h> 29 30 #include "pxa2xx-pcm.h" 31 32 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97) 33 { 34 if (!pxa2xx_ac97_try_cold_reset()) 35 pxa2xx_ac97_try_warm_reset(); 36 37 pxa2xx_ac97_finish_reset(); 38 } 39 40 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, 41 unsigned short reg) 42 { 43 int ret; 44 45 ret = pxa2xx_ac97_read(ac97->num, reg); 46 if (ret < 0) 47 return 0; 48 else 49 return (unsigned short)(ret & 0xffff); 50 } 51 52 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, 53 unsigned short reg, unsigned short val) 54 { 55 int __always_unused ret; 56 57 ret = pxa2xx_ac97_write(ac97->num, reg, val); 58 } 59 60 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 61 .read = pxa2xx_ac97_legacy_read, 62 .write = pxa2xx_ac97_legacy_write, 63 .reset = pxa2xx_ac97_legacy_reset, 64 }; 65 66 static struct pxad_param pxa2xx_ac97_pcm_out_req = { 67 .prio = PXAD_PRIO_LOWEST, 68 .drcmr = 12, 69 }; 70 71 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = { 72 .addr = __PREG(PCDR), 73 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 74 .maxburst = 32, 75 .filter_data = &pxa2xx_ac97_pcm_out_req, 76 }; 77 78 static struct pxad_param pxa2xx_ac97_pcm_in_req = { 79 .prio = PXAD_PRIO_LOWEST, 80 .drcmr = 11, 81 }; 82 83 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = { 84 .addr = __PREG(PCDR), 85 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 86 .maxburst = 32, 87 .filter_data = &pxa2xx_ac97_pcm_in_req, 88 }; 89 90 static struct snd_pcm *pxa2xx_ac97_pcm; 91 static struct snd_ac97 *pxa2xx_ac97_ac97; 92 93 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream) 94 { 95 struct snd_pcm_runtime *runtime = substream->runtime; 96 pxa2xx_audio_ops_t *platform_ops; 97 int r; 98 99 runtime->hw.channels_min = 2; 100 runtime->hw.channels_max = 2; 101 102 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 103 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 104 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r]; 105 snd_pcm_limit_hw_rates(runtime); 106 107 platform_ops = substream->pcm->card->dev->platform_data; 108 if (platform_ops && platform_ops->startup) 109 return platform_ops->startup(substream, platform_ops->priv); 110 else 111 return 0; 112 } 113 114 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream) 115 { 116 pxa2xx_audio_ops_t *platform_ops; 117 118 platform_ops = substream->pcm->card->dev->platform_data; 119 if (platform_ops && platform_ops->shutdown) 120 platform_ops->shutdown(substream, platform_ops->priv); 121 } 122 123 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 124 { 125 struct snd_pcm_runtime *runtime = substream->runtime; 126 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 127 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 128 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 129 } 130 131 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = { 132 .playback_params = &pxa2xx_ac97_pcm_out, 133 .capture_params = &pxa2xx_ac97_pcm_in, 134 .startup = pxa2xx_ac97_pcm_startup, 135 .shutdown = pxa2xx_ac97_pcm_shutdown, 136 .prepare = pxa2xx_ac97_pcm_prepare, 137 }; 138 139 #ifdef CONFIG_PM_SLEEP 140 141 static int pxa2xx_ac97_do_suspend(struct snd_card *card) 142 { 143 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 144 145 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 146 snd_pcm_suspend_all(pxa2xx_ac97_pcm); 147 snd_ac97_suspend(pxa2xx_ac97_ac97); 148 if (platform_ops && platform_ops->suspend) 149 platform_ops->suspend(platform_ops->priv); 150 151 return pxa2xx_ac97_hw_suspend(); 152 } 153 154 static int pxa2xx_ac97_do_resume(struct snd_card *card) 155 { 156 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 157 int rc; 158 159 rc = pxa2xx_ac97_hw_resume(); 160 if (rc) 161 return rc; 162 163 if (platform_ops && platform_ops->resume) 164 platform_ops->resume(platform_ops->priv); 165 snd_ac97_resume(pxa2xx_ac97_ac97); 166 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 167 168 return 0; 169 } 170 171 static int pxa2xx_ac97_suspend(struct device *dev) 172 { 173 struct snd_card *card = dev_get_drvdata(dev); 174 int ret = 0; 175 176 if (card) 177 ret = pxa2xx_ac97_do_suspend(card); 178 179 return ret; 180 } 181 182 static int pxa2xx_ac97_resume(struct device *dev) 183 { 184 struct snd_card *card = dev_get_drvdata(dev); 185 int ret = 0; 186 187 if (card) 188 ret = pxa2xx_ac97_do_resume(card); 189 190 return ret; 191 } 192 193 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 194 #endif 195 196 static int pxa2xx_ac97_probe(struct platform_device *dev) 197 { 198 struct snd_card *card; 199 struct snd_ac97_bus *ac97_bus; 200 struct snd_ac97_template ac97_template; 201 int ret; 202 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 203 204 if (dev->id >= 0) { 205 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 206 ret = -ENXIO; 207 goto err_dev; 208 } 209 210 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 211 THIS_MODULE, 0, &card); 212 if (ret < 0) 213 goto err; 214 215 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 216 217 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm); 218 if (ret) 219 goto err; 220 221 ret = pxa2xx_ac97_hw_probe(dev); 222 if (ret) 223 goto err; 224 225 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 226 if (ret) 227 goto err_remove; 228 memset(&ac97_template, 0, sizeof(ac97_template)); 229 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 230 if (ret) 231 goto err_remove; 232 233 snprintf(card->shortname, sizeof(card->shortname), 234 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 235 snprintf(card->longname, sizeof(card->longname), 236 "%s (%s)", dev->dev.driver->name, card->mixername); 237 238 if (pdata && pdata->codec_pdata[0]) 239 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 240 ret = snd_card_register(card); 241 if (ret == 0) { 242 platform_set_drvdata(dev, card); 243 return 0; 244 } 245 246 err_remove: 247 pxa2xx_ac97_hw_remove(dev); 248 err: 249 if (card) 250 snd_card_free(card); 251 err_dev: 252 return ret; 253 } 254 255 static int pxa2xx_ac97_remove(struct platform_device *dev) 256 { 257 struct snd_card *card = platform_get_drvdata(dev); 258 259 if (card) { 260 snd_card_free(card); 261 pxa2xx_ac97_hw_remove(dev); 262 } 263 264 return 0; 265 } 266 267 static struct platform_driver pxa2xx_ac97_driver = { 268 .probe = pxa2xx_ac97_probe, 269 .remove = pxa2xx_ac97_remove, 270 .driver = { 271 .name = "pxa2xx-ac97", 272 #ifdef CONFIG_PM_SLEEP 273 .pm = &pxa2xx_ac97_pm_ops, 274 #endif 275 }, 276 }; 277 278 module_platform_driver(pxa2xx_ac97_driver); 279 280 MODULE_AUTHOR("Nicolas Pitre"); 281 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 282 MODULE_LICENSE("GPL"); 283 MODULE_ALIAS("platform:pxa2xx-ac97"); 284