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_reset(struct snd_ac97 *ac97) 33 { 34 if (!pxa2xx_ac97_try_cold_reset(ac97)) { 35 pxa2xx_ac97_try_warm_reset(ac97); 36 } 37 38 pxa2xx_ac97_finish_reset(ac97); 39 } 40 41 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 42 .read = pxa2xx_ac97_read, 43 .write = pxa2xx_ac97_write, 44 .reset = pxa2xx_ac97_reset, 45 }; 46 47 static struct pxad_param pxa2xx_ac97_pcm_out_req = { 48 .prio = PXAD_PRIO_LOWEST, 49 .drcmr = 12, 50 }; 51 52 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = { 53 .addr = __PREG(PCDR), 54 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 55 .maxburst = 32, 56 .filter_data = &pxa2xx_ac97_pcm_out_req, 57 }; 58 59 static struct pxad_param pxa2xx_ac97_pcm_in_req = { 60 .prio = PXAD_PRIO_LOWEST, 61 .drcmr = 11, 62 }; 63 64 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = { 65 .addr = __PREG(PCDR), 66 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 67 .maxburst = 32, 68 .filter_data = &pxa2xx_ac97_pcm_in_req, 69 }; 70 71 static struct snd_pcm *pxa2xx_ac97_pcm; 72 static struct snd_ac97 *pxa2xx_ac97_ac97; 73 74 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream) 75 { 76 struct snd_pcm_runtime *runtime = substream->runtime; 77 pxa2xx_audio_ops_t *platform_ops; 78 int r; 79 80 runtime->hw.channels_min = 2; 81 runtime->hw.channels_max = 2; 82 83 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 84 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 85 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r]; 86 snd_pcm_limit_hw_rates(runtime); 87 88 platform_ops = substream->pcm->card->dev->platform_data; 89 if (platform_ops && platform_ops->startup) 90 return platform_ops->startup(substream, platform_ops->priv); 91 else 92 return 0; 93 } 94 95 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream) 96 { 97 pxa2xx_audio_ops_t *platform_ops; 98 99 platform_ops = substream->pcm->card->dev->platform_data; 100 if (platform_ops && platform_ops->shutdown) 101 platform_ops->shutdown(substream, platform_ops->priv); 102 } 103 104 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 105 { 106 struct snd_pcm_runtime *runtime = substream->runtime; 107 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 108 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 109 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 110 } 111 112 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = { 113 .playback_params = &pxa2xx_ac97_pcm_out, 114 .capture_params = &pxa2xx_ac97_pcm_in, 115 .startup = pxa2xx_ac97_pcm_startup, 116 .shutdown = pxa2xx_ac97_pcm_shutdown, 117 .prepare = pxa2xx_ac97_pcm_prepare, 118 }; 119 120 #ifdef CONFIG_PM_SLEEP 121 122 static int pxa2xx_ac97_do_suspend(struct snd_card *card) 123 { 124 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 125 126 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 127 snd_pcm_suspend_all(pxa2xx_ac97_pcm); 128 snd_ac97_suspend(pxa2xx_ac97_ac97); 129 if (platform_ops && platform_ops->suspend) 130 platform_ops->suspend(platform_ops->priv); 131 132 return pxa2xx_ac97_hw_suspend(); 133 } 134 135 static int pxa2xx_ac97_do_resume(struct snd_card *card) 136 { 137 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 138 int rc; 139 140 rc = pxa2xx_ac97_hw_resume(); 141 if (rc) 142 return rc; 143 144 if (platform_ops && platform_ops->resume) 145 platform_ops->resume(platform_ops->priv); 146 snd_ac97_resume(pxa2xx_ac97_ac97); 147 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 148 149 return 0; 150 } 151 152 static int pxa2xx_ac97_suspend(struct device *dev) 153 { 154 struct snd_card *card = dev_get_drvdata(dev); 155 int ret = 0; 156 157 if (card) 158 ret = pxa2xx_ac97_do_suspend(card); 159 160 return ret; 161 } 162 163 static int pxa2xx_ac97_resume(struct device *dev) 164 { 165 struct snd_card *card = dev_get_drvdata(dev); 166 int ret = 0; 167 168 if (card) 169 ret = pxa2xx_ac97_do_resume(card); 170 171 return ret; 172 } 173 174 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 175 #endif 176 177 static int pxa2xx_ac97_probe(struct platform_device *dev) 178 { 179 struct snd_card *card; 180 struct snd_ac97_bus *ac97_bus; 181 struct snd_ac97_template ac97_template; 182 int ret; 183 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 184 185 if (dev->id >= 0) { 186 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 187 ret = -ENXIO; 188 goto err_dev; 189 } 190 191 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 192 THIS_MODULE, 0, &card); 193 if (ret < 0) 194 goto err; 195 196 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 197 198 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm); 199 if (ret) 200 goto err; 201 202 ret = pxa2xx_ac97_hw_probe(dev); 203 if (ret) 204 goto err; 205 206 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 207 if (ret) 208 goto err_remove; 209 memset(&ac97_template, 0, sizeof(ac97_template)); 210 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 211 if (ret) 212 goto err_remove; 213 214 snprintf(card->shortname, sizeof(card->shortname), 215 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 216 snprintf(card->longname, sizeof(card->longname), 217 "%s (%s)", dev->dev.driver->name, card->mixername); 218 219 if (pdata && pdata->codec_pdata[0]) 220 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 221 ret = snd_card_register(card); 222 if (ret == 0) { 223 platform_set_drvdata(dev, card); 224 return 0; 225 } 226 227 err_remove: 228 pxa2xx_ac97_hw_remove(dev); 229 err: 230 if (card) 231 snd_card_free(card); 232 err_dev: 233 return ret; 234 } 235 236 static int pxa2xx_ac97_remove(struct platform_device *dev) 237 { 238 struct snd_card *card = platform_get_drvdata(dev); 239 240 if (card) { 241 snd_card_free(card); 242 pxa2xx_ac97_hw_remove(dev); 243 } 244 245 return 0; 246 } 247 248 static struct platform_driver pxa2xx_ac97_driver = { 249 .probe = pxa2xx_ac97_probe, 250 .remove = pxa2xx_ac97_remove, 251 .driver = { 252 .name = "pxa2xx-ac97", 253 #ifdef CONFIG_PM_SLEEP 254 .pm = &pxa2xx_ac97_pm_ops, 255 #endif 256 }, 257 }; 258 259 module_platform_driver(pxa2xx_ac97_driver); 260 261 MODULE_AUTHOR("Nicolas Pitre"); 262 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 263 MODULE_LICENSE("GPL"); 264 MODULE_ALIAS("platform:pxa2xx-ac97"); 265