1 /* sound/soc/samsung/ac97.c
3 * ALSA SoC Audio Layer - S3C AC97 Controller driver
4 * Evolved from s3c2443-ac97.c
6 * Copyright (c) 2010 Samsung Electronics Co. Ltd
7 * Author: Jaswinder Singh <jassi.brar@samsung.com>
8 * Credits: Graeme Gregory, Sean Choi
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/clk.h>
18 #include <linux/module.h>
20 #include <sound/soc.h>
23 #include <plat/regs-ac97.h>
24 #include <plat/audio.h>
28 #define AC_CMD_ADDR(x) (x << 16)
29 #define AC_CMD_DATA(x) (x & 0xffff)
31 #define S3C_AC97_DAI_PCM 0
32 #define S3C_AC97_DAI_MIC 1
34 struct s3c_ac97_info {
38 struct completion done;
40 static struct s3c_ac97_info s3c_ac97;
42 static struct s3c2410_dma_client s3c_dma_client_out = {
46 static struct s3c2410_dma_client s3c_dma_client_in = {
50 static struct s3c2410_dma_client s3c_dma_client_micin = {
54 static struct s3c_dma_params s3c_ac97_pcm_out = {
55 .client = &s3c_dma_client_out,
59 static struct s3c_dma_params s3c_ac97_pcm_in = {
60 .client = &s3c_dma_client_in,
64 static struct s3c_dma_params s3c_ac97_mic_in = {
65 .client = &s3c_dma_client_micin,
69 static void s3c_ac97_activate(struct snd_ac97 *ac97)
73 stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
74 if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)
75 return; /* Return if already active */
77 INIT_COMPLETION(s3c_ac97.done);
79 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
80 ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
81 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
84 ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
85 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
88 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
89 ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
90 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
92 if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
93 pr_err("AC97: Unable to activate!");
96 static unsigned short s3c_ac97_read(struct snd_ac97 *ac97,
99 u32 ac_glbctrl, ac_codec_cmd;
100 u32 stat, addr, data;
102 mutex_lock(&s3c_ac97.lock);
104 s3c_ac97_activate(ac97);
106 INIT_COMPLETION(s3c_ac97.done);
108 ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
109 ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);
110 writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
114 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
115 ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
116 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
118 if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
119 pr_err("AC97: Unable to read!");
121 stat = readl(s3c_ac97.regs + S3C_AC97_STAT);
122 addr = (stat >> 16) & 0x7f;
123 data = (stat & 0xffff);
126 pr_err("ac97: req addr = %02x, rep addr = %02x\n",
129 mutex_unlock(&s3c_ac97.lock);
131 return (unsigned short)data;
134 static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
137 u32 ac_glbctrl, ac_codec_cmd;
139 mutex_lock(&s3c_ac97.lock);
141 s3c_ac97_activate(ac97);
143 INIT_COMPLETION(s3c_ac97.done);
145 ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
146 ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);
147 writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
151 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
152 ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
153 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
155 if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
156 pr_err("AC97: Unable to write!");
158 ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
159 ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;
160 writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
162 mutex_unlock(&s3c_ac97.lock);
165 static void s3c_ac97_cold_reset(struct snd_ac97 *ac97)
167 pr_debug("AC97: Cold reset\n");
168 writel(S3C_AC97_GLBCTRL_COLDRESET,
169 s3c_ac97.regs + S3C_AC97_GLBCTRL);
172 writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
176 static void s3c_ac97_warm_reset(struct snd_ac97 *ac97)
180 stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
181 if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)
182 return; /* Return if already active */
184 pr_debug("AC97: Warm reset\n");
186 writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL);
189 writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
192 s3c_ac97_activate(ac97);
195 static irqreturn_t s3c_ac97_irq(int irq, void *dev_id)
197 u32 ac_glbctrl, ac_glbstat;
199 ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT);
201 if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) {
203 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
204 ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
205 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
207 complete(&s3c_ac97.done);
210 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
211 ac_glbctrl |= (1<<30); /* Clear interrupt */
212 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
217 struct snd_ac97_bus_ops soc_ac97_ops = {
218 .read = s3c_ac97_read,
219 .write = s3c_ac97_write,
220 .warm_reset = s3c_ac97_warm_reset,
221 .reset = s3c_ac97_cold_reset,
223 EXPORT_SYMBOL_GPL(soc_ac97_ops);
225 static int s3c_ac97_hw_params(struct snd_pcm_substream *substream,
226 struct snd_pcm_hw_params *params,
227 struct snd_soc_dai *dai)
229 struct snd_soc_pcm_runtime *rtd = substream->private_data;
230 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
231 struct s3c_dma_params *dma_data;
233 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
234 dma_data = &s3c_ac97_pcm_out;
236 dma_data = &s3c_ac97_pcm_in;
238 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
243 static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
244 struct snd_soc_dai *dai)
247 struct snd_soc_pcm_runtime *rtd = substream->private_data;
248 struct s3c_dma_params *dma_data =
249 snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
251 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
252 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
253 ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
255 ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
258 case SNDRV_PCM_TRIGGER_START:
259 case SNDRV_PCM_TRIGGER_RESUME:
260 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
261 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
262 ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
264 ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;
267 case SNDRV_PCM_TRIGGER_STOP:
268 case SNDRV_PCM_TRIGGER_SUSPEND:
269 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
273 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
275 s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
280 static int s3c_ac97_hw_mic_params(struct snd_pcm_substream *substream,
281 struct snd_pcm_hw_params *params,
282 struct snd_soc_dai *dai)
284 struct snd_soc_pcm_runtime *rtd = substream->private_data;
285 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
287 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
290 snd_soc_dai_set_dma_data(cpu_dai, substream, &s3c_ac97_mic_in);
295 static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
296 int cmd, struct snd_soc_dai *dai)
299 struct snd_soc_pcm_runtime *rtd = substream->private_data;
300 struct s3c_dma_params *dma_data =
301 snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
303 ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
304 ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK;
307 case SNDRV_PCM_TRIGGER_START:
308 case SNDRV_PCM_TRIGGER_RESUME:
309 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
310 ac_glbctrl |= S3C_AC97_GLBCTRL_MICINTM_DMA;
313 case SNDRV_PCM_TRIGGER_STOP:
314 case SNDRV_PCM_TRIGGER_SUSPEND:
315 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
319 writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
321 s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
326 static struct snd_soc_dai_ops s3c_ac97_dai_ops = {
327 .hw_params = s3c_ac97_hw_params,
328 .trigger = s3c_ac97_trigger,
331 static struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {
332 .hw_params = s3c_ac97_hw_mic_params,
333 .trigger = s3c_ac97_mic_trigger,
336 static struct snd_soc_dai_driver s3c_ac97_dai[] = {
337 [S3C_AC97_DAI_PCM] = {
338 .name = "samsung-ac97",
341 .stream_name = "AC97 Playback",
344 .rates = SNDRV_PCM_RATE_8000_48000,
345 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
347 .stream_name = "AC97 Capture",
350 .rates = SNDRV_PCM_RATE_8000_48000,
351 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
352 .ops = &s3c_ac97_dai_ops,
354 [S3C_AC97_DAI_MIC] = {
355 .name = "samsung-ac97-mic",
358 .stream_name = "AC97 Mic Capture",
361 .rates = SNDRV_PCM_RATE_8000_48000,
362 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
363 .ops = &s3c_ac97_mic_dai_ops,
367 static __devinit int s3c_ac97_probe(struct platform_device *pdev)
369 struct resource *mem_res, *dmatx_res, *dmarx_res, *dmamic_res, *irq_res;
370 struct s3c_audio_pdata *ac97_pdata;
373 ac97_pdata = pdev->dev.platform_data;
374 if (!ac97_pdata || !ac97_pdata->cfg_gpio) {
375 dev_err(&pdev->dev, "cfg_gpio callback not provided!\n");
379 /* Check for availability of necessary resource */
380 dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
382 dev_err(&pdev->dev, "Unable to get AC97-TX dma resource\n");
386 dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
388 dev_err(&pdev->dev, "Unable to get AC97-RX dma resource\n");
392 dmamic_res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
394 dev_err(&pdev->dev, "Unable to get AC97-MIC dma resource\n");
398 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
400 dev_err(&pdev->dev, "Unable to get register resource\n");
404 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
406 dev_err(&pdev->dev, "AC97 IRQ not provided!\n");
410 if (!request_mem_region(mem_res->start,
411 resource_size(mem_res), "ac97")) {
412 dev_err(&pdev->dev, "Unable to request register region\n");
416 s3c_ac97_pcm_out.channel = dmatx_res->start;
417 s3c_ac97_pcm_out.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
418 s3c_ac97_pcm_in.channel = dmarx_res->start;
419 s3c_ac97_pcm_in.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
420 s3c_ac97_mic_in.channel = dmamic_res->start;
421 s3c_ac97_mic_in.dma_addr = mem_res->start + S3C_AC97_MIC_DATA;
423 init_completion(&s3c_ac97.done);
424 mutex_init(&s3c_ac97.lock);
426 s3c_ac97.regs = ioremap(mem_res->start, resource_size(mem_res));
427 if (s3c_ac97.regs == NULL) {
428 dev_err(&pdev->dev, "Unable to ioremap register region\n");
433 s3c_ac97.ac97_clk = clk_get(&pdev->dev, "ac97");
434 if (IS_ERR(s3c_ac97.ac97_clk)) {
435 dev_err(&pdev->dev, "ac97 failed to get ac97_clock\n");
439 clk_enable(s3c_ac97.ac97_clk);
441 if (ac97_pdata->cfg_gpio(pdev)) {
442 dev_err(&pdev->dev, "Unable to configure gpio\n");
447 ret = request_irq(irq_res->start, s3c_ac97_irq,
450 dev_err(&pdev->dev, "ac97: interrupt request failed.\n");
454 ret = snd_soc_register_dais(&pdev->dev, s3c_ac97_dai,
455 ARRAY_SIZE(s3c_ac97_dai));
462 free_irq(irq_res->start, NULL);
465 clk_disable(s3c_ac97.ac97_clk);
466 clk_put(s3c_ac97.ac97_clk);
468 iounmap(s3c_ac97.regs);
470 release_mem_region(mem_res->start, resource_size(mem_res));
475 static __devexit int s3c_ac97_remove(struct platform_device *pdev)
477 struct resource *mem_res, *irq_res;
479 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(s3c_ac97_dai));
481 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
483 free_irq(irq_res->start, NULL);
485 clk_disable(s3c_ac97.ac97_clk);
486 clk_put(s3c_ac97.ac97_clk);
488 iounmap(s3c_ac97.regs);
490 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
492 release_mem_region(mem_res->start, resource_size(mem_res));
497 static struct platform_driver s3c_ac97_driver = {
498 .probe = s3c_ac97_probe,
499 .remove = __devexit_p(s3c_ac97_remove),
501 .name = "samsung-ac97",
502 .owner = THIS_MODULE,
506 static int __init s3c_ac97_init(void)
508 return platform_driver_register(&s3c_ac97_driver);
510 module_init(s3c_ac97_init);
512 static void __exit s3c_ac97_exit(void)
514 platform_driver_unregister(&s3c_ac97_driver);
516 module_exit(s3c_ac97_exit);
518 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
519 MODULE_DESCRIPTION("AC97 driver for the Samsung SoC");
520 MODULE_LICENSE("GPL");
521 MODULE_ALIAS("platform:samsung-ac97");