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