243 lines
6.4 KiB
C
243 lines
6.4 KiB
C
/*
|
|
* TXx9 ACLC AC97 driver
|
|
*
|
|
* Copyright (C) 2009 Atsushi Nemoto
|
|
*
|
|
* Based on RBTX49xx patch from CELF patch archive.
|
|
* (C) Copyright TOSHIBA CORPORATION 2004-2006
|
|
*
|
|
* 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/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/gfp.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/soc.h>
|
|
#include "txx9aclc.h"
|
|
|
|
#define AC97_DIR \
|
|
(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
|
|
|
|
#define AC97_RATES \
|
|
SNDRV_PCM_RATE_8000_48000
|
|
|
|
#ifdef __BIG_ENDIAN
|
|
#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_BE
|
|
#else
|
|
#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_LE
|
|
#endif
|
|
|
|
static DECLARE_WAIT_QUEUE_HEAD(ac97_waitq);
|
|
|
|
/* REVISIT: How to find txx9aclc_drvdata from snd_ac97? */
|
|
static struct txx9aclc_plat_drvdata *txx9aclc_drvdata;
|
|
|
|
static int txx9aclc_regready(struct txx9aclc_plat_drvdata *drvdata)
|
|
{
|
|
return __raw_readl(drvdata->base + ACINTSTS) & ACINT_REGACCRDY;
|
|
}
|
|
|
|
/* AC97 controller reads codec register */
|
|
static unsigned short txx9aclc_ac97_read(struct snd_ac97 *ac97,
|
|
unsigned short reg)
|
|
{
|
|
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
|
|
void __iomem *base = drvdata->base;
|
|
u32 dat;
|
|
|
|
if (!(__raw_readl(base + ACINTSTS) & ACINT_CODECRDY(ac97->num)))
|
|
return 0xffff;
|
|
reg |= ac97->num << 7;
|
|
dat = (reg << ACREGACC_REG_SHIFT) | ACREGACC_READ;
|
|
__raw_writel(dat, base + ACREGACC);
|
|
__raw_writel(ACINT_REGACCRDY, base + ACINTEN);
|
|
if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
|
|
__raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
|
|
printk(KERN_ERR "ac97 read timeout (reg %#x)\n", reg);
|
|
dat = 0xffff;
|
|
goto done;
|
|
}
|
|
dat = __raw_readl(base + ACREGACC);
|
|
if (((dat >> ACREGACC_REG_SHIFT) & 0xff) != reg) {
|
|
printk(KERN_ERR "reg mismatch %x with %x\n",
|
|
dat, reg);
|
|
dat = 0xffff;
|
|
goto done;
|
|
}
|
|
dat = (dat >> ACREGACC_DAT_SHIFT) & 0xffff;
|
|
done:
|
|
__raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
|
|
return dat;
|
|
}
|
|
|
|
/* AC97 controller writes to codec register */
|
|
static void txx9aclc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
|
|
unsigned short val)
|
|
{
|
|
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
|
|
void __iomem *base = drvdata->base;
|
|
|
|
__raw_writel(((reg | (ac97->num << 7)) << ACREGACC_REG_SHIFT) |
|
|
(val << ACREGACC_DAT_SHIFT),
|
|
base + ACREGACC);
|
|
__raw_writel(ACINT_REGACCRDY, base + ACINTEN);
|
|
if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
|
|
printk(KERN_ERR
|
|
"ac97 write timeout (reg %#x)\n", reg);
|
|
}
|
|
__raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
|
|
}
|
|
|
|
static void txx9aclc_ac97_cold_reset(struct snd_ac97 *ac97)
|
|
{
|
|
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
|
|
void __iomem *base = drvdata->base;
|
|
u32 ready = ACINT_CODECRDY(ac97->num) | ACINT_REGACCRDY;
|
|
|
|
__raw_writel(ACCTL_ENLINK, base + ACCTLDIS);
|
|
mmiowb();
|
|
udelay(1);
|
|
__raw_writel(ACCTL_ENLINK, base + ACCTLEN);
|
|
/* wait for primary codec ready status */
|
|
__raw_writel(ready, base + ACINTEN);
|
|
if (!wait_event_timeout(ac97_waitq,
|
|
(__raw_readl(base + ACINTSTS) & ready) == ready,
|
|
HZ)) {
|
|
dev_err(&ac97->dev, "primary codec is not ready "
|
|
"(status %#x)\n",
|
|
__raw_readl(base + ACINTSTS));
|
|
}
|
|
__raw_writel(ACINT_REGACCRDY, base + ACINTSTS);
|
|
__raw_writel(ready, base + ACINTDIS);
|
|
}
|
|
|
|
/* AC97 controller operations */
|
|
struct snd_ac97_bus_ops soc_ac97_ops = {
|
|
.read = txx9aclc_ac97_read,
|
|
.write = txx9aclc_ac97_write,
|
|
.reset = txx9aclc_ac97_cold_reset,
|
|
};
|
|
EXPORT_SYMBOL_GPL(soc_ac97_ops);
|
|
|
|
static irqreturn_t txx9aclc_ac97_irq(int irq, void *dev_id)
|
|
{
|
|
struct txx9aclc_plat_drvdata *drvdata = dev_id;
|
|
void __iomem *base = drvdata->base;
|
|
|
|
__raw_writel(__raw_readl(base + ACINTMSTS), base + ACINTDIS);
|
|
wake_up(&ac97_waitq);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int txx9aclc_ac97_probe(struct snd_soc_dai *dai)
|
|
{
|
|
txx9aclc_drvdata = snd_soc_dai_get_drvdata(dai);
|
|
return 0;
|
|
}
|
|
|
|
static int txx9aclc_ac97_remove(struct snd_soc_dai *dai)
|
|
{
|
|
struct txx9aclc_plat_drvdata *drvdata = snd_soc_dai_get_drvdata(dai);
|
|
|
|
/* disable AC-link */
|
|
__raw_writel(ACCTL_ENLINK, drvdata->base + ACCTLDIS);
|
|
txx9aclc_drvdata = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_dai_driver txx9aclc_ac97_dai = {
|
|
.ac97_control = 1,
|
|
.probe = txx9aclc_ac97_probe,
|
|
.remove = txx9aclc_ac97_remove,
|
|
.playback = {
|
|
.rates = AC97_RATES,
|
|
.formats = AC97_FMTS,
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
},
|
|
.capture = {
|
|
.rates = AC97_RATES,
|
|
.formats = AC97_FMTS,
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
},
|
|
};
|
|
|
|
static int __devinit txx9aclc_ac97_dev_probe(struct platform_device *pdev)
|
|
{
|
|
struct txx9aclc_plat_drvdata *drvdata;
|
|
struct resource *r;
|
|
int err;
|
|
int irq;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!r)
|
|
return -EBUSY;
|
|
|
|
if (!devm_request_mem_region(&pdev->dev, r->start, resource_size(r),
|
|
dev_name(&pdev->dev)))
|
|
return -EBUSY;
|
|
|
|
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
|
|
if (!drvdata)
|
|
return -ENOMEM;
|
|
platform_set_drvdata(pdev, drvdata);
|
|
drvdata->physbase = r->start;
|
|
if (sizeof(drvdata->physbase) > sizeof(r->start) &&
|
|
r->start >= TXX9_DIRECTMAP_BASE &&
|
|
r->start < TXX9_DIRECTMAP_BASE + 0x400000)
|
|
drvdata->physbase |= 0xf00000000ull;
|
|
drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
|
|
if (!drvdata->base)
|
|
return -EBUSY;
|
|
err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
|
|
IRQF_DISABLED, dev_name(&pdev->dev), drvdata);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return snd_soc_register_dai(&pdev->dev, &txx9aclc_ac97_dai);
|
|
}
|
|
|
|
static int __devexit txx9aclc_ac97_dev_remove(struct platform_device *pdev)
|
|
{
|
|
snd_soc_unregister_dai(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver txx9aclc_ac97_driver = {
|
|
.probe = txx9aclc_ac97_dev_probe,
|
|
.remove = __devexit_p(txx9aclc_ac97_dev_remove),
|
|
.driver = {
|
|
.name = "txx9aclc-ac97",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init txx9aclc_ac97_init(void)
|
|
{
|
|
return platform_driver_register(&txx9aclc_ac97_driver);
|
|
}
|
|
|
|
static void __exit txx9aclc_ac97_exit(void)
|
|
{
|
|
platform_driver_unregister(&txx9aclc_ac97_driver);
|
|
}
|
|
|
|
module_init(txx9aclc_ac97_init);
|
|
module_exit(txx9aclc_ac97_exit);
|
|
|
|
MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
|
|
MODULE_DESCRIPTION("TXx9 ACLC AC97 driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:txx9aclc-ac97");
|