2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
4 * Author: Nicolas Pitre
5 * Created: Dec 02, 2004
6 * Copyright: MontaVista Software Inc.
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.
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/interrupt.h>
17 #include <linux/wait.h>
18 #include <linux/delay.h>
20 #include <sound/driver.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/ac97_codec.h>
24 #include <sound/initval.h>
25 #include <sound/soc.h>
28 #include <linux/mutex.h>
29 #include <asm/hardware.h>
30 #include <asm/arch/pxa-regs.h>
31 #include <asm/arch/audio.h>
33 #include "pxa2xx-pcm.h"
34 #include "pxa2xx-ac97.h"
36 static DEFINE_MUTEX(car_mutex);
37 static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
38 static volatile long gsr_bits;
43 * o Slot 12 read from modem space will hang controller.
44 * o CDONE, SDONE interrupt fails after any slot 12 IO.
46 * We therefore have an hybrid approach for waiting on SDONE (interrupt or
47 * 1 jiffy timeout if interrupt never comes).
50 static unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97,
53 unsigned short val = -1;
54 volatile u32 *reg_addr;
56 mutex_lock(&car_mutex);
58 /* set up primary or secondary codec/modem space */
60 reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
62 if (reg == AC97_GPIO_STATUS)
63 reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
65 reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
67 reg_addr += (reg >> 1);
70 if (reg == AC97_GPIO_STATUS) {
71 /* read from controller cache */
77 /* start read access across the ac97 link */
78 GSR = GSR_CDONE | GSR_SDONE;
82 wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
83 if (!((GSR | gsr_bits) & GSR_SDONE)) {
84 printk(KERN_ERR "%s: read error (ac97_reg=%x GSR=%#lx)\n",
85 __FUNCTION__, reg, GSR | gsr_bits);
91 GSR = GSR_CDONE | GSR_SDONE;
94 /* but we've just started another cycle... */
95 wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
97 out: mutex_unlock(&car_mutex);
101 static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
104 volatile u32 *reg_addr;
106 mutex_lock(&car_mutex);
108 /* set up primary or secondary codec/modem space */
110 reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
112 if (reg == AC97_GPIO_STATUS)
113 reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
115 reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
117 reg_addr += (reg >> 1);
119 GSR = GSR_CDONE | GSR_SDONE;
122 wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1);
123 if (!((GSR | gsr_bits) & GSR_CDONE))
124 printk(KERN_ERR "%s: write error (ac97_reg=%x GSR=%#lx)\n",
125 __FUNCTION__, reg, GSR | gsr_bits);
127 mutex_unlock(&car_mutex);
130 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
135 /* warm reset broken on Bulverde,
136 so manually keep AC97 reset high */
137 pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH);
140 pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
143 GCR |= GCR_WARM_RST | GCR_PRIRDY_IEN | GCR_SECRDY_IEN;
144 wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
147 if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
148 printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
149 __FUNCTION__, gsr_bits);
151 GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
152 GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
155 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
157 GCR &= GCR_COLD_RST; /* clear everything but nCRST */
158 GCR &= ~GCR_COLD_RST; /* then assert nCRST */
162 /* PXA27x Developers Manual section 13.5.2.2.1 */
163 pxa_set_cken(1 << 31, 1);
165 pxa_set_cken(1 << 31, 0);
170 GCR |= GCR_CDONE_IE|GCR_SDONE_IE;
171 wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
174 if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
175 printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
176 __FUNCTION__, gsr_bits);
178 GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
179 GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
182 static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
193 /* Although we don't use those we still need to clear them
194 since they tend to spuriously trigger when MMC is used
195 (hardware bug? go figure)... */
207 struct snd_ac97_bus_ops soc_ac97_ops = {
208 .read = pxa2xx_ac97_read,
209 .write = pxa2xx_ac97_write,
210 .warm_reset = pxa2xx_ac97_warm_reset,
211 .reset = pxa2xx_ac97_cold_reset,
214 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_out = {
215 .name = "AC97 PCM Stereo out",
216 .dev_addr = __PREG(PCDR),
217 .drcmr = &DRCMRTXPCDR,
218 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
219 DCMD_BURST32 | DCMD_WIDTH4,
222 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_in = {
223 .name = "AC97 PCM Stereo in",
224 .dev_addr = __PREG(PCDR),
225 .drcmr = &DRCMRRXPCDR,
226 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
227 DCMD_BURST32 | DCMD_WIDTH4,
230 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_out = {
231 .name = "AC97 Aux PCM (Slot 5) Mono out",
232 .dev_addr = __PREG(MODR),
233 .drcmr = &DRCMRTXMODR,
234 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
235 DCMD_BURST16 | DCMD_WIDTH2,
238 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_in = {
239 .name = "AC97 Aux PCM (Slot 5) Mono in",
240 .dev_addr = __PREG(MODR),
241 .drcmr = &DRCMRRXMODR,
242 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
243 DCMD_BURST16 | DCMD_WIDTH2,
246 static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_mic_mono_in = {
247 .name = "AC97 Mic PCM (Slot 6) Mono in",
248 .dev_addr = __PREG(MCDR),
249 .drcmr = &DRCMRRXMCDR,
250 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
251 DCMD_BURST16 | DCMD_WIDTH2,
255 static int pxa2xx_ac97_suspend(struct platform_device *pdev,
256 struct snd_soc_cpu_dai *dai)
258 GCR |= GCR_ACLINK_OFF;
259 pxa_set_cken(CKEN_AC97, 0);
263 static int pxa2xx_ac97_resume(struct platform_device *pdev,
264 struct snd_soc_cpu_dai *dai)
266 pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
267 pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
268 pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
269 pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
271 /* Use GPIO 113 as AC97 Reset on Bulverde */
272 pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
274 pxa_set_cken(CKEN_AC97, 1);
279 #define pxa2xx_ac97_suspend NULL
280 #define pxa2xx_ac97_resume NULL
283 static int pxa2xx_ac97_probe(struct platform_device *pdev)
287 ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, IRQF_DISABLED, "AC97", NULL);
291 pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
292 pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
293 pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
294 pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
296 /* Use GPIO 113 as AC97 Reset on Bulverde */
297 pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
299 pxa_set_cken(CKEN_AC97, 1);
303 if (CKEN & (1 << CKEN_AC97)) {
304 GCR |= GCR_ACLINK_OFF;
305 free_irq(IRQ_AC97, NULL);
306 pxa_set_cken(CKEN_AC97, 0);
311 static void pxa2xx_ac97_remove(struct platform_device *pdev)
313 GCR |= GCR_ACLINK_OFF;
314 free_irq(IRQ_AC97, NULL);
315 pxa_set_cken(CKEN_AC97, 0);
318 static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
319 struct snd_pcm_hw_params *params)
321 struct snd_soc_pcm_runtime *rtd = substream->private_data;
322 struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
324 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
325 cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_out;
327 cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_in;
332 static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
333 struct snd_pcm_hw_params *params)
335 struct snd_soc_pcm_runtime *rtd = substream->private_data;
336 struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
338 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
339 cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
341 cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
346 static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
347 struct snd_pcm_hw_params *params)
349 struct snd_soc_pcm_runtime *rtd = substream->private_data;
350 struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
352 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
355 cpu_dai->dma_data = &pxa2xx_ac97_pcm_mic_mono_in;
360 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
361 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
362 SNDRV_PCM_RATE_48000)
365 * There is only 1 physical AC97 interface for pxa2xx, but it
366 * has extra fifo's that can be used for aux DACs and ADCs.
368 struct snd_soc_cpu_dai pxa_ac97_dai[] = {
370 .name = "pxa2xx-ac97",
372 .type = SND_SOC_DAI_AC97,
373 .probe = pxa2xx_ac97_probe,
374 .remove = pxa2xx_ac97_remove,
375 .suspend = pxa2xx_ac97_suspend,
376 .resume = pxa2xx_ac97_resume,
378 .stream_name = "AC97 Playback",
381 .rates = PXA2XX_AC97_RATES,
382 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
384 .stream_name = "AC97 Capture",
387 .rates = PXA2XX_AC97_RATES,
388 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
390 .hw_params = pxa2xx_ac97_hw_params,},
393 .name = "pxa2xx-ac97-aux",
395 .type = SND_SOC_DAI_AC97,
397 .stream_name = "AC97 Aux Playback",
400 .rates = PXA2XX_AC97_RATES,
401 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
403 .stream_name = "AC97 Aux Capture",
406 .rates = PXA2XX_AC97_RATES,
407 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
409 .hw_params = pxa2xx_ac97_hw_aux_params,},
412 .name = "pxa2xx-ac97-mic",
414 .type = SND_SOC_DAI_AC97,
416 .stream_name = "AC97 Mic Capture",
419 .rates = PXA2XX_AC97_RATES,
420 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
422 .hw_params = pxa2xx_ac97_hw_mic_params,},
426 EXPORT_SYMBOL_GPL(pxa_ac97_dai);
427 EXPORT_SYMBOL_GPL(soc_ac97_ops);
429 MODULE_AUTHOR("Nicolas Pitre");
430 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
431 MODULE_LICENSE("GPL");