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 19 #include <sound/core.h> 20 #include <sound/pcm.h> 21 #include <sound/ac97_codec.h> 22 #include <sound/initval.h> 23 #include <sound/pxa2xx-lib.h> 24 #include <sound/dmaengine_pcm.h> 25 26 #include <mach/regs-ac97.h> 27 #include <mach/audio.h> 28 29 #include "pxa2xx-pcm.h" 30 31 static void pxa2xx_ac97_reset(struct snd_ac97 *ac97) 32 { 33 if (!pxa2xx_ac97_try_cold_reset(ac97)) { 34 pxa2xx_ac97_try_warm_reset(ac97); 35 } 36 37 pxa2xx_ac97_finish_reset(ac97); 38 } 39 40 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 41 .read = pxa2xx_ac97_read, 42 .write = pxa2xx_ac97_write, 43 .reset = pxa2xx_ac97_reset, 44 }; 45 46 static unsigned long pxa2xx_ac97_pcm_out_req = 12; 47 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = { 48 .addr = __PREG(PCDR), 49 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 50 .maxburst = 32, 51 .filter_data = &pxa2xx_ac97_pcm_out_req, 52 }; 53 54 static unsigned long pxa2xx_ac97_pcm_in_req = 11; 55 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = { 56 .addr = __PREG(PCDR), 57 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 58 .maxburst = 32, 59 .filter_data = &pxa2xx_ac97_pcm_in_req, 60 }; 61 62 static struct snd_pcm *pxa2xx_ac97_pcm; 63 static struct snd_ac97 *pxa2xx_ac97_ac97; 64 65 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream) 66 { 67 struct snd_pcm_runtime *runtime = substream->runtime; 68 pxa2xx_audio_ops_t *platform_ops; 69 int r; 70 71 runtime->hw.channels_min = 2; 72 runtime->hw.channels_max = 2; 73 74 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 75 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 76 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r]; 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 return platform_ops->startup(substream, platform_ops->priv); 82 else 83 return 0; 84 } 85 86 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream) 87 { 88 pxa2xx_audio_ops_t *platform_ops; 89 90 platform_ops = substream->pcm->card->dev->platform_data; 91 if (platform_ops && platform_ops->shutdown) 92 platform_ops->shutdown(substream, platform_ops->priv); 93 } 94 95 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 96 { 97 struct snd_pcm_runtime *runtime = substream->runtime; 98 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 99 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 100 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 101 } 102 103 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = { 104 .playback_params = &pxa2xx_ac97_pcm_out, 105 .capture_params = &pxa2xx_ac97_pcm_in, 106 .startup = pxa2xx_ac97_pcm_startup, 107 .shutdown = pxa2xx_ac97_pcm_shutdown, 108 .prepare = pxa2xx_ac97_pcm_prepare, 109 }; 110 111 #ifdef CONFIG_PM_SLEEP 112 113 static int pxa2xx_ac97_do_suspend(struct snd_card *card) 114 { 115 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 116 117 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 118 snd_pcm_suspend_all(pxa2xx_ac97_pcm); 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 SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 166 #endif 167 168 static int 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 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 pxa2xx_ac97_hw_remove(dev); 236 } 237 238 return 0; 239 } 240 241 static struct platform_driver pxa2xx_ac97_driver = { 242 .probe = pxa2xx_ac97_probe, 243 .remove = pxa2xx_ac97_remove, 244 .driver = { 245 .name = "pxa2xx-ac97", 246 .owner = THIS_MODULE, 247 #ifdef CONFIG_PM_SLEEP 248 .pm = &pxa2xx_ac97_pm_ops, 249 #endif 250 }, 251 }; 252 253 module_platform_driver(pxa2xx_ac97_driver); 254 255 MODULE_AUTHOR("Nicolas Pitre"); 256 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 257 MODULE_LICENSE("GPL"); 258 MODULE_ALIAS("platform:pxa2xx-ac97"); 259