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/module.h> 15 #include <linux/platform_device.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 23 #include <mach/regs-ac97.h> 24 #include <mach/audio.h> 25 26 #include "pxa2xx-pcm.h" 27 28 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97) 29 { 30 if (!pxa2xx_ac97_try_cold_reset(ac97)) { 31 pxa2xx_ac97_try_warm_reset(ac97); 32 } 33 34 pxa2xx_ac97_finish_reset(ac97); 35 } 36 37 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 38 .read = pxa2xx_ac97_read, 39 .write = pxa2xx_ac97_write, 40 .reset = pxa2xx_ac97_reset, 41 }; 42 43 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = { 44 .name = "AC97 PCM out", 45 .dev_addr = __PREG(PCDR), 46 .drcmr = &DRCMR(12), 47 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | 48 DCMD_BURST32 | DCMD_WIDTH4, 49 }; 50 51 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = { 52 .name = "AC97 PCM in", 53 .dev_addr = __PREG(PCDR), 54 .drcmr = &DRCMR(11), 55 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | 56 DCMD_BURST32 | DCMD_WIDTH4, 57 }; 58 59 static struct snd_pcm *pxa2xx_ac97_pcm; 60 static struct snd_ac97 *pxa2xx_ac97_ac97; 61 62 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream) 63 { 64 struct snd_pcm_runtime *runtime = substream->runtime; 65 pxa2xx_audio_ops_t *platform_ops; 66 int r; 67 68 runtime->hw.channels_min = 2; 69 runtime->hw.channels_max = 2; 70 71 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 72 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 73 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r]; 74 snd_pcm_limit_hw_rates(runtime); 75 76 platform_ops = substream->pcm->card->dev->platform_data; 77 if (platform_ops && platform_ops->startup) 78 return platform_ops->startup(substream, platform_ops->priv); 79 else 80 return 0; 81 } 82 83 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream) 84 { 85 pxa2xx_audio_ops_t *platform_ops; 86 87 platform_ops = substream->pcm->card->dev->platform_data; 88 if (platform_ops && platform_ops->shutdown) 89 platform_ops->shutdown(substream, platform_ops->priv); 90 } 91 92 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 93 { 94 struct snd_pcm_runtime *runtime = substream->runtime; 95 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 96 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 97 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 98 } 99 100 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = { 101 .playback_params = &pxa2xx_ac97_pcm_out, 102 .capture_params = &pxa2xx_ac97_pcm_in, 103 .startup = pxa2xx_ac97_pcm_startup, 104 .shutdown = pxa2xx_ac97_pcm_shutdown, 105 .prepare = pxa2xx_ac97_pcm_prepare, 106 }; 107 108 #ifdef CONFIG_PM 109 110 static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state) 111 { 112 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 113 114 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 115 snd_pcm_suspend_all(pxa2xx_ac97_pcm); 116 snd_ac97_suspend(pxa2xx_ac97_ac97); 117 if (platform_ops && platform_ops->suspend) 118 platform_ops->suspend(platform_ops->priv); 119 120 return pxa2xx_ac97_hw_suspend(); 121 } 122 123 static int pxa2xx_ac97_do_resume(struct snd_card *card) 124 { 125 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 126 int rc; 127 128 rc = pxa2xx_ac97_hw_resume(); 129 if (rc) 130 return rc; 131 132 if (platform_ops && platform_ops->resume) 133 platform_ops->resume(platform_ops->priv); 134 snd_ac97_resume(pxa2xx_ac97_ac97); 135 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 136 137 return 0; 138 } 139 140 static int pxa2xx_ac97_suspend(struct device *dev) 141 { 142 struct snd_card *card = dev_get_drvdata(dev); 143 int ret = 0; 144 145 if (card) 146 ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND); 147 148 return ret; 149 } 150 151 static int pxa2xx_ac97_resume(struct device *dev) 152 { 153 struct snd_card *card = dev_get_drvdata(dev); 154 int ret = 0; 155 156 if (card) 157 ret = pxa2xx_ac97_do_resume(card); 158 159 return ret; 160 } 161 162 static const struct dev_pm_ops pxa2xx_ac97_pm_ops = { 163 .suspend = pxa2xx_ac97_suspend, 164 .resume = pxa2xx_ac97_resume, 165 }; 166 #endif 167 168 static int __devinit pxa2xx_ac97_probe(struct platform_device *dev) 169 { 170 struct snd_card *card; 171 struct snd_ac97_bus *ac97_bus; 172 struct snd_ac97_template ac97_template; 173 int ret; 174 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 175 176 if (dev->id >= 0) { 177 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 178 ret = -ENXIO; 179 goto err_dev; 180 } 181 182 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 183 THIS_MODULE, 0, &card); 184 if (ret < 0) 185 goto err; 186 187 card->dev = &dev->dev; 188 strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 189 190 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm); 191 if (ret) 192 goto err; 193 194 ret = pxa2xx_ac97_hw_probe(dev); 195 if (ret) 196 goto err; 197 198 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 199 if (ret) 200 goto err_remove; 201 memset(&ac97_template, 0, sizeof(ac97_template)); 202 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 203 if (ret) 204 goto err_remove; 205 206 snprintf(card->shortname, sizeof(card->shortname), 207 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 208 snprintf(card->longname, sizeof(card->longname), 209 "%s (%s)", dev->dev.driver->name, card->mixername); 210 211 if (pdata && pdata->codec_pdata[0]) 212 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 213 snd_card_set_dev(card, &dev->dev); 214 ret = snd_card_register(card); 215 if (ret == 0) { 216 platform_set_drvdata(dev, card); 217 return 0; 218 } 219 220 err_remove: 221 pxa2xx_ac97_hw_remove(dev); 222 err: 223 if (card) 224 snd_card_free(card); 225 err_dev: 226 return ret; 227 } 228 229 static int __devexit pxa2xx_ac97_remove(struct platform_device *dev) 230 { 231 struct snd_card *card = platform_get_drvdata(dev); 232 233 if (card) { 234 snd_card_free(card); 235 platform_set_drvdata(dev, NULL); 236 pxa2xx_ac97_hw_remove(dev); 237 } 238 239 return 0; 240 } 241 242 static struct platform_driver pxa2xx_ac97_driver = { 243 .probe = pxa2xx_ac97_probe, 244 .remove = __devexit_p(pxa2xx_ac97_remove), 245 .driver = { 246 .name = "pxa2xx-ac97", 247 .owner = THIS_MODULE, 248 #ifdef CONFIG_PM 249 .pm = &pxa2xx_ac97_pm_ops, 250 #endif 251 }, 252 }; 253 254 static int __init pxa2xx_ac97_init(void) 255 { 256 return platform_driver_register(&pxa2xx_ac97_driver); 257 } 258 259 static void __exit pxa2xx_ac97_exit(void) 260 { 261 platform_driver_unregister(&pxa2xx_ac97_driver); 262 } 263 264 module_init(pxa2xx_ac97_init); 265 module_exit(pxa2xx_ac97_exit); 266 267 MODULE_AUTHOR("Nicolas Pitre"); 268 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 269 MODULE_LICENSE("GPL"); 270 MODULE_ALIAS("platform:pxa2xx-ac97"); 271