[ALSA] ASoC pxa2xx AC97 support
This patch adds pxa2xx AC97 ASoC audio support. It's based on sound/arm/pxa-ac97 by Nicolas Pitre with the following differences. o Modified driver structure to use ASoC core PCM callbacks. o Removed AC97 configuration function (all handled in ASoC core) o Added and exported ASoC DAI configuration table. o Added DMA support for AUX DAC and Mic ADC o Separated out AC97 reset into cold and warm reset functions. From: Liam Girdwood <liam.girdwood@wolfsonmicro.com> Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Liam Girdwood
Jaroslav Kysela
parent
3e7cc3d3d1
commit
75b4102766
|
|
@ -0,0 +1,437 @@
|
|||
/*
|
||||
* linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
|
||||
*
|
||||
* Author: Nicolas Pitre
|
||||
* Created: Dec 02, 2004
|
||||
* Copyright: MontaVista Software Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
#include <sound/driver.h>
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/ac97_codec.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/soc.h>
|
||||
|
||||
#include <asm/irq.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <asm/hardware.h>
|
||||
#include <asm/arch/pxa-regs.h>
|
||||
#include <asm/arch/audio.h>
|
||||
|
||||
#include "pxa2xx-pcm.h"
|
||||
|
||||
static DEFINE_MUTEX(car_mutex);
|
||||
static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
|
||||
static volatile long gsr_bits;
|
||||
|
||||
#define AC97_DIR \
|
||||
(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
|
||||
|
||||
#define AC97_RATES \
|
||||
(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
|
||||
SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
|
||||
|
||||
/* may need to expand this */
|
||||
static struct snd_soc_dai_mode pxa2xx_ac97_modes[] = {
|
||||
{
|
||||
.pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
|
||||
.pcmrate = AC97_RATES,
|
||||
.pcmdir = AC97_DIR,
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* Beware PXA27x bugs:
|
||||
*
|
||||
* o Slot 12 read from modem space will hang controller.
|
||||
* o CDONE, SDONE interrupt fails after any slot 12 IO.
|
||||
*
|
||||
* We therefore have an hybrid approach for waiting on SDONE (interrupt or
|
||||
* 1 jiffy timeout if interrupt never comes).
|
||||
*/
|
||||
|
||||
static unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97,
|
||||
unsigned short reg)
|
||||
{
|
||||
unsigned short val = -1;
|
||||
volatile u32 *reg_addr;
|
||||
|
||||
mutex_lock(&car_mutex);
|
||||
|
||||
/* set up primary or secondary codec/modem space */
|
||||
#ifdef CONFIG_PXA27x
|
||||
reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
|
||||
#else
|
||||
if (reg == AC97_GPIO_STATUS)
|
||||
reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
|
||||
else
|
||||
reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
|
||||
#endif
|
||||
reg_addr += (reg >> 1);
|
||||
|
||||
#ifndef CONFIG_PXA27x
|
||||
if (reg == AC97_GPIO_STATUS) {
|
||||
/* read from controller cache */
|
||||
val = *reg_addr;
|
||||
goto out;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* start read access across the ac97 link */
|
||||
GSR = GSR_CDONE | GSR_SDONE;
|
||||
gsr_bits = 0;
|
||||
val = *reg_addr;
|
||||
|
||||
wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
|
||||
if (!((GSR | gsr_bits) & GSR_SDONE)) {
|
||||
printk(KERN_ERR "%s: read error (ac97_reg=%x GSR=%#lx)\n",
|
||||
__FUNCTION__, reg, GSR | gsr_bits);
|
||||
val = -1;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* valid data now */
|
||||
GSR = GSR_CDONE | GSR_SDONE;
|
||||
gsr_bits = 0;
|
||||
val = *reg_addr;
|
||||
/* but we've just started another cycle... */
|
||||
wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1);
|
||||
|
||||
out: mutex_unlock(&car_mutex);
|
||||
return val;
|
||||
}
|
||||
|
||||
static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
|
||||
unsigned short val)
|
||||
{
|
||||
volatile u32 *reg_addr;
|
||||
|
||||
mutex_lock(&car_mutex);
|
||||
|
||||
/* set up primary or secondary codec/modem space */
|
||||
#ifdef CONFIG_PXA27x
|
||||
reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
|
||||
#else
|
||||
if (reg == AC97_GPIO_STATUS)
|
||||
reg_addr = ac97->num ? &SMC_REG_BASE : &PMC_REG_BASE;
|
||||
else
|
||||
reg_addr = ac97->num ? &SAC_REG_BASE : &PAC_REG_BASE;
|
||||
#endif
|
||||
reg_addr += (reg >> 1);
|
||||
|
||||
GSR = GSR_CDONE | GSR_SDONE;
|
||||
gsr_bits = 0;
|
||||
*reg_addr = val;
|
||||
wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1);
|
||||
if (!((GSR | gsr_bits) & GSR_CDONE))
|
||||
printk(KERN_ERR "%s: write error (ac97_reg=%x GSR=%#lx)\n",
|
||||
__FUNCTION__, reg, GSR | gsr_bits);
|
||||
|
||||
mutex_unlock(&car_mutex);
|
||||
}
|
||||
|
||||
static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
|
||||
{
|
||||
gsr_bits = 0;
|
||||
|
||||
#ifdef CONFIG_PXA27x
|
||||
/* warm reset broken on Bulverde,
|
||||
so manually keep AC97 reset high */
|
||||
pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH);
|
||||
udelay(10);
|
||||
GCR |= GCR_WARM_RST;
|
||||
pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
|
||||
udelay(500);
|
||||
#else
|
||||
GCR |= GCR_WARM_RST | GCR_PRIRDY_IEN | GCR_SECRDY_IEN;
|
||||
wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
|
||||
#endif
|
||||
|
||||
if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
|
||||
printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
|
||||
__FUNCTION__, gsr_bits);
|
||||
|
||||
GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
|
||||
GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
|
||||
}
|
||||
|
||||
static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
|
||||
{
|
||||
GCR &= GCR_COLD_RST; /* clear everything but nCRST */
|
||||
GCR &= ~GCR_COLD_RST; /* then assert nCRST */
|
||||
|
||||
gsr_bits = 0;
|
||||
#ifdef CONFIG_PXA27x
|
||||
/* PXA27x Developers Manual section 13.5.2.2.1 */
|
||||
pxa_set_cken(1 << 31, 1);
|
||||
udelay(5);
|
||||
pxa_set_cken(1 << 31, 0);
|
||||
GCR = GCR_COLD_RST;
|
||||
udelay(50);
|
||||
#else
|
||||
GCR = GCR_COLD_RST;
|
||||
GCR |= GCR_CDONE_IE|GCR_SDONE_IE;
|
||||
wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
|
||||
#endif
|
||||
|
||||
if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
|
||||
printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
|
||||
__FUNCTION__, gsr_bits);
|
||||
|
||||
GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
|
||||
GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
|
||||
}
|
||||
|
||||
static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id)
|
||||
{
|
||||
long status;
|
||||
|
||||
status = GSR;
|
||||
if (status) {
|
||||
GSR = status;
|
||||
gsr_bits |= status;
|
||||
wake_up(&gsr_wq);
|
||||
|
||||
#ifdef CONFIG_PXA27x
|
||||
/* Although we don't use those we still need to clear them
|
||||
since they tend to spuriously trigger when MMC is used
|
||||
(hardware bug? go figure)... */
|
||||
MISR = MISR_EOC;
|
||||
PISR = PISR_EOC;
|
||||
MCSR = MCSR_EOC;
|
||||
#endif
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
return IRQ_NONE;
|
||||
}
|
||||
|
||||
struct snd_ac97_bus_ops soc_ac97_ops = {
|
||||
.read = pxa2xx_ac97_read,
|
||||
.write = pxa2xx_ac97_write,
|
||||
.warm_reset = pxa2xx_ac97_warm_reset,
|
||||
.reset = pxa2xx_ac97_cold_reset,
|
||||
};
|
||||
|
||||
static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_out = {
|
||||
.name = "AC97 PCM Stereo out",
|
||||
.dev_addr = __PREG(PCDR),
|
||||
.drcmr = &DRCMRTXPCDR,
|
||||
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
|
||||
DCMD_BURST32 | DCMD_WIDTH4,
|
||||
};
|
||||
|
||||
static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_stereo_in = {
|
||||
.name = "AC97 PCM Stereo in",
|
||||
.dev_addr = __PREG(PCDR),
|
||||
.drcmr = &DRCMRRXPCDR,
|
||||
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
|
||||
DCMD_BURST32 | DCMD_WIDTH4,
|
||||
};
|
||||
|
||||
static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_out = {
|
||||
.name = "AC97 Aux PCM (Slot 5) Mono out",
|
||||
.dev_addr = __PREG(MODR),
|
||||
.drcmr = &DRCMRTXMODR,
|
||||
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
|
||||
DCMD_BURST16 | DCMD_WIDTH2,
|
||||
};
|
||||
|
||||
static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_aux_mono_in = {
|
||||
.name = "AC97 Aux PCM (Slot 5) Mono in",
|
||||
.dev_addr = __PREG(MODR),
|
||||
.drcmr = &DRCMRRXMODR,
|
||||
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
|
||||
DCMD_BURST16 | DCMD_WIDTH2,
|
||||
};
|
||||
|
||||
static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_mic_mono_in = {
|
||||
.name = "AC97 Mic PCM (Slot 6) Mono in",
|
||||
.dev_addr = __PREG(MCDR),
|
||||
.drcmr = &DRCMRRXMCDR,
|
||||
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
|
||||
DCMD_BURST16 | DCMD_WIDTH2,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int pxa2xx_ac97_suspend(struct platform_device *pdev,
|
||||
struct snd_soc_cpu_dai *dai)
|
||||
{
|
||||
GCR |= GCR_ACLINK_OFF;
|
||||
pxa_set_cken(CKEN2_AC97, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa2xx_ac97_resume(struct platform_device *pdev,
|
||||
struct snd_soc_cpu_dai *dai)
|
||||
{
|
||||
pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
|
||||
pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
|
||||
pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
|
||||
pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
|
||||
#ifdef CONFIG_PXA27x
|
||||
/* Use GPIO 113 as AC97 Reset on Bulverde */
|
||||
pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
|
||||
#endif
|
||||
pxa_set_cken(CKEN2_AC97, 1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
#define pxa2xx_ac97_suspend NULL
|
||||
#define pxa2xx_ac97_resume NULL
|
||||
#endif
|
||||
|
||||
static int pxa2xx_ac97_probe(struct platform_device *pdev)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, IRQF_DISABLED, "AC97", NULL);
|
||||
if (ret < 0)
|
||||
goto err;
|
||||
|
||||
pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
|
||||
pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
|
||||
pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
|
||||
pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
|
||||
#ifdef CONFIG_PXA27x
|
||||
/* Use GPIO 113 as AC97 Reset on Bulverde */
|
||||
pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
|
||||
#endif
|
||||
pxa_set_cken(CKEN2_AC97, 1);
|
||||
return 0;
|
||||
|
||||
err:
|
||||
if (CKEN & CKEN2_AC97) {
|
||||
GCR |= GCR_ACLINK_OFF;
|
||||
free_irq(IRQ_AC97, NULL);
|
||||
pxa_set_cken(CKEN2_AC97, 0);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void pxa2xx_ac97_remove(struct platform_device *pdev)
|
||||
{
|
||||
GCR |= GCR_ACLINK_OFF;
|
||||
free_irq(IRQ_AC97, NULL);
|
||||
pxa_set_cken(CKEN2_AC97, 0);
|
||||
}
|
||||
|
||||
static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||||
rtd->cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_out;
|
||||
else
|
||||
rtd->cpu_dai->dma_data = &pxa2xx_ac97_pcm_stereo_in;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||||
rtd->cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
|
||||
else
|
||||
rtd->cpu_dai->dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||||
return -ENODEV;
|
||||
else
|
||||
rtd->cpu_dai->dma_data = &pxa2xx_ac97_pcm_mic_mono_in;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* There is only 1 physical AC97 interface for pxa2xx, but it
|
||||
* has extra fifo's that can be used for aux DACs and ADCs.
|
||||
*/
|
||||
struct snd_soc_cpu_dai pxa_ac97_dai[] = {
|
||||
{
|
||||
.name = "pxa2xx-ac97",
|
||||
.id = 0,
|
||||
.type = SND_SOC_DAI_AC97,
|
||||
.probe = pxa2xx_ac97_probe,
|
||||
.remove = pxa2xx_ac97_remove,
|
||||
.suspend = pxa2xx_ac97_suspend,
|
||||
.resume = pxa2xx_ac97_resume,
|
||||
.playback = {
|
||||
.stream_name = "AC97 Playback",
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,},
|
||||
.capture = {
|
||||
.stream_name = "AC97 Capture",
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,},
|
||||
.ops = {
|
||||
.hw_params = pxa2xx_ac97_hw_params,},
|
||||
.caps = {
|
||||
.num_modes = ARRAY_SIZE(pxa2xx_ac97_modes),
|
||||
.mode = pxa2xx_ac97_modes,},
|
||||
},
|
||||
{
|
||||
.name = "pxa2xx-ac97-aux",
|
||||
.id = 1,
|
||||
.type = SND_SOC_DAI_AC97,
|
||||
.playback = {
|
||||
.stream_name = "AC97 Aux Playback",
|
||||
.channels_min = 1,
|
||||
.channels_max = 1,},
|
||||
.capture = {
|
||||
.stream_name = "AC97 Aux Capture",
|
||||
.channels_min = 1,
|
||||
.channels_max = 1,},
|
||||
.ops = {
|
||||
.hw_params = pxa2xx_ac97_hw_aux_params,},
|
||||
.caps = {
|
||||
.num_modes = ARRAY_SIZE(pxa2xx_ac97_modes),
|
||||
.mode = pxa2xx_ac97_modes,},
|
||||
},
|
||||
{
|
||||
.name = "pxa2xx-ac97-mic",
|
||||
.id = 2,
|
||||
.type = SND_SOC_DAI_AC97,
|
||||
.capture = {
|
||||
.stream_name = "AC97 Mic Capture",
|
||||
.channels_min = 1,
|
||||
.channels_max = 1,},
|
||||
.ops = {
|
||||
.hw_params = pxa2xx_ac97_hw_mic_params,},
|
||||
.caps = {
|
||||
.num_modes = ARRAY_SIZE(pxa2xx_ac97_modes),
|
||||
.mode = pxa2xx_ac97_modes,},},
|
||||
};
|
||||
|
||||
EXPORT_SYMBOL_GPL(pxa_ac97_dai);
|
||||
EXPORT_SYMBOL_GPL(soc_ac97_ops);
|
||||
|
||||
MODULE_AUTHOR("Nicolas Pitre");
|
||||
MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue