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[ALSA] SH7760 ASoC support

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ALSA ASoC support for SH7760
This patch adds ALSA ASoC drivers for the Audio interfaces
of the SH7760 SoC:
Add driver for the SH7760 DMA engine (dmabrg)
Add AC97 driver for HAC unit(s) found on SH7760/SH7780
Add I2S driver for SSI unit(s) found on SH7760/SH7780
Add a generic SH7760-AC97 machine driver.
Hook it all up with the build system.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Manuel Lauss 2007-05-14 18:40:07 +02:00 committed by Jaroslav Kysela
parent 80ab1c0e9e
commit aef3b06ac6
8 changed files with 1223 additions and 1 deletions
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1
sound/soc/Kconfig
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@ -27,6 +27,7 @@ config SND_SOC
source "sound/soc/at91/Kconfig"
source "sound/soc/pxa/Kconfig"
source "sound/soc/s3c24xx/Kconfig"
source "sound/soc/sh/Kconfig"
# Supported codecs
source "sound/soc/codecs/Kconfig"

2
sound/soc/Makefile
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@ -1,4 +1,4 @@
snd-soc-core-objs := soc-core.o soc-dapm.o
obj-$(CONFIG_SND_SOC) += snd-soc-core.o
obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/
obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/

39
sound/soc/sh/Kconfig Normal file
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@ -0,0 +1,39 @@
menu "SoC Audio support for SuperH"
config SND_SOC_PCM_SH7760
tristate "SoC Audio support for Renesas SH7760"
depends on CPU_SUBTYPE_SH7760 && SND_SOC
select SH_DMABRG
help
Enable this option for SH7760 AC97/I2S audio support.
##
## Audio unit modules
##
config SND_SOC_SH4_HAC
select AC97_BUS
select SND_SOC_AC97_BUS
select SND_AC97_CODEC
tristate
config SND_SOC_SH4_SSI
tristate
##
## Boards
##
config SND_SH7760_AC97
tristate "SH7760 AC97 sound support"
depends on CPU_SUBTYPE_SH7760 && SND_SOC_PCM_SH7760
select SND_SOC_SH4_HAC
select SND_SOC_AC97_CODEC
help
This option enables generic sound support for the first
AC97 unit of the SH7760.
endmenu

14
sound/soc/sh/Makefile Normal file
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@ -0,0 +1,14 @@
## DMA engines
snd-soc-dma-sh7760-objs := dma-sh7760.o
obj-$(CONFIG_SND_SOC_PCM_SH7760) += snd-soc-dma-sh7760.o
## audio units found on some SH-4
snd-soc-hac-objs := hac.o
snd-soc-ssi-objs := ssi.o
obj-$(CONFIG_SND_SOC_SH4_HAC) += snd-soc-hac.o
obj-$(CONFIG_SND_SOC_SH4_SSI) += snd-soc-ssi.o
## boards
snd-soc-sh7760-ac97-objs := sh7760-ac97.o
obj-$(CONFIG_SND_SH7760_AC97) += snd-soc-sh7760-ac97.o

354
sound/soc/sh/dma-sh7760.c Normal file
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@ -0,0 +1,354 @@
/*
* SH7760 ("camelot") DMABRG audio DMA unit support
*
* Copyright (C) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
* licensed under the terms outlined in the file COPYING at the root
* of the linux kernel sources.
*
* The SH7760 DMABRG provides 4 dma channels (2x rec, 2x play), which
* trigger an interrupt when one half of the programmed transfer size
* has been xmitted.
*
* FIXME: little-endian only for now
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <asm/dmabrg.h>
/* registers and bits */
#define BRGATXSAR 0x00
#define BRGARXDAR 0x04
#define BRGATXTCR 0x08
#define BRGARXTCR 0x0C
#define BRGACR 0x10
#define BRGATXTCNT 0x14
#define BRGARXTCNT 0x18
#define ACR_RAR (1 << 18)
#define ACR_RDS (1 << 17)
#define ACR_RDE (1 << 16)
#define ACR_TAR (1 << 2)
#define ACR_TDS (1 << 1)
#define ACR_TDE (1 << 0)
/* receiver/transmitter data alignment */
#define ACR_RAM_NONE (0 << 24)
#define ACR_RAM_4BYTE (1 << 24)
#define ACR_RAM_2WORD (2 << 24)
#define ACR_TAM_NONE (0 << 8)
#define ACR_TAM_4BYTE (1 << 8)
#define ACR_TAM_2WORD (2 << 8)
struct camelot_pcm {
unsigned long mmio; /* DMABRG audio channel control reg MMIO */
unsigned int txid; /* ID of first DMABRG IRQ for this unit */
struct snd_pcm_substream *tx_ss;
unsigned long tx_period_size;
unsigned int tx_period;
struct snd_pcm_substream *rx_ss;
unsigned long rx_period_size;
unsigned int rx_period;
} cam_pcm_data[2] = {
{
.mmio = 0xFE3C0040,
.txid = DMABRGIRQ_A0TXF,
},
{
.mmio = 0xFE3C0060,
.txid = DMABRGIRQ_A1TXF,
},
};
#define BRGREG(x) (*(unsigned long *)(cam->mmio + (x)))
/*
* set a minimum of 16kb per period, to avoid interrupt-"storm" and
* resulting skipping. In general, the bigger the minimum size, the
* better for overall system performance. (The SH7760 is a puny CPU
* with a slow SDRAM interface and poor internal bus bandwidth,
* *especially* when the LCDC is active). The minimum for the DMAC
* is 8 bytes; 16kbytes are enough to get skip-free playback of a
* 44kHz/16bit/stereo MP3 on a lightly loaded system, and maintain
* reasonable responsiveness in MPlayer.
*/
#define DMABRG_PERIOD_MIN 16 * 1024
#define DMABRG_PERIOD_MAX 0x03fffffc
#define DMABRG_PREALLOC_BUFFER 32 * 1024
#define DMABRG_PREALLOC_BUFFER_MAX 32 * 1024
/* support everything the SSI supports */
#define DMABRG_RATES \
SNDRV_PCM_RATE_8000_192000
#define DMABRG_FMTS \
(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE | \
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3LE | \
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE)
static struct snd_pcm_hardware camelot_pcm_hardware = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = DMABRG_FMTS,
.rates = DMABRG_RATES,
.rate_min = 8000,
.rate_max = 192000,
.channels_min = 2,
.channels_max = 8, /* max of the SSI */
.buffer_bytes_max = DMABRG_PERIOD_MAX,
.period_bytes_min = DMABRG_PERIOD_MIN,
.period_bytes_max = DMABRG_PERIOD_MAX / 2,
.periods_min = 2,
.periods_max = 2,
.fifo_size = 128,
};
static void camelot_txdma(void *data)
{
struct camelot_pcm *cam = data;
cam->tx_period ^= 1;
snd_pcm_period_elapsed(cam->tx_ss);
}
static void camelot_rxdma(void *data)
{
struct camelot_pcm *cam = data;
cam->rx_period ^= 1;
snd_pcm_period_elapsed(cam->rx_ss);
}
static int camelot_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id];
int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
int ret, dmairq;
snd_soc_set_runtime_hwparams(substream, &camelot_pcm_hardware);
/* DMABRG buffer half/full events */
dmairq = (recv) ? cam->txid + 2 : cam->txid;
if (recv) {
cam->rx_ss = substream;
ret = dmabrg_request_irq(dmairq, camelot_rxdma, cam);
if (unlikely(ret)) {
pr_debug("audio unit %d irqs already taken!\n",
rtd->dai->cpu_dai->id);
return -EBUSY;
}
(void)dmabrg_request_irq(dmairq + 1,camelot_rxdma, cam);
} else {
cam->tx_ss = substream;
ret = dmabrg_request_irq(dmairq, camelot_txdma, cam);
if (unlikely(ret)) {
pr_debug("audio unit %d irqs already taken!\n",
rtd->dai->cpu_dai->id);
return -EBUSY;
}
(void)dmabrg_request_irq(dmairq + 1, camelot_txdma, cam);
}
return 0;
}
static int camelot_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id];
int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
int dmairq;
dmairq = (recv) ? cam->txid + 2 : cam->txid;
if (recv)
cam->rx_ss = NULL;
else
cam->tx_ss = NULL;
dmabrg_free_irq(dmairq + 1);
dmabrg_free_irq(dmairq);
return 0;
}
static int camelot_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id];
int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
int ret;
ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
if (ret < 0)
return ret;
if (recv) {
cam->rx_period_size = params_period_bytes(hw_params);
cam->rx_period = 0;
} else {
cam->tx_period_size = params_period_bytes(hw_params);
cam->tx_period = 0;
}
return 0;
}
static int camelot_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static int camelot_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id];
pr_debug("PCM data: addr 0x%08ulx len %d\n",
(u32)runtime->dma_addr, runtime->dma_bytes);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
BRGREG(BRGATXSAR) = (unsigned long)runtime->dma_area;
BRGREG(BRGATXTCR) = runtime->dma_bytes;
} else {
BRGREG(BRGARXDAR) = (unsigned long)runtime->dma_area;
BRGREG(BRGARXTCR) = runtime->dma_bytes;
}
return 0;
}
static inline void dmabrg_play_dma_start(struct camelot_pcm *cam)
{
unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
/* start DMABRG engine: XFER start, auto-addr-reload */
BRGREG(BRGACR) = acr | ACR_TDE | ACR_TAR | ACR_TAM_2WORD;
}
static inline void dmabrg_play_dma_stop(struct camelot_pcm *cam)
{
unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
/* forcibly terminate data transmission */
BRGREG(BRGACR) = acr | ACR_TDS;
}
static inline void dmabrg_rec_dma_start(struct camelot_pcm *cam)
{
unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
/* start DMABRG engine: recv start, auto-reload */
BRGREG(BRGACR) = acr | ACR_RDE | ACR_RAR | ACR_RAM_2WORD;
}
static inline void dmabrg_rec_dma_stop(struct camelot_pcm *cam)
{
unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
/* forcibly terminate data receiver */
BRGREG(BRGACR) = acr | ACR_RDS;
}
static int camelot_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id];
int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
if (recv)
dmabrg_rec_dma_start(cam);
else
dmabrg_play_dma_start(cam);
break;
case SNDRV_PCM_TRIGGER_STOP:
if (recv)
dmabrg_rec_dma_stop(cam);
else
dmabrg_play_dma_stop(cam);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t camelot_pos(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct camelot_pcm *cam = &cam_pcm_data[rtd->dai->cpu_dai->id];
int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
unsigned long pos;
/* cannot use the DMABRG pointer register: under load, by the
* time ALSA comes around to read the register, it is already
* far ahead (or worse, already done with the fragment) of the
* position at the time the IRQ was triggered, which results in
* fast-playback sound in my test application (ScummVM)
*/
if (recv)
pos = cam->rx_period ? cam->rx_period_size : 0;
else
pos = cam->tx_period ? cam->tx_period_size : 0;
return bytes_to_frames(runtime, pos);
}
static struct snd_pcm_ops camelot_pcm_ops = {
.open = camelot_pcm_open,
.close = camelot_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = camelot_hw_params,
.hw_free = camelot_hw_free,
.prepare = camelot_prepare,
.trigger = camelot_trigger,
.pointer = camelot_pos,
};
static void camelot_pcm_free(struct snd_pcm *pcm)
{
snd_pcm_lib_preallocate_free_for_all(pcm);
}
static int camelot_pcm_new(struct snd_card *card,
struct snd_soc_codec_dai *dai,
struct snd_pcm *pcm)
{
/* dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
* in MMAP mode (i.e. aplay -M)
*/
snd_pcm_lib_preallocate_pages_for_all(pcm,
SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
DMABRG_PREALLOC_BUFFER, DMABRG_PREALLOC_BUFFER_MAX);
return 0;
}
struct snd_soc_platform sh7760_soc_platform = {
.name = "sh7760-pcm",
.pcm_ops = &camelot_pcm_ops,
.pcm_new = camelot_pcm_new,
.pcm_free = camelot_pcm_free,
};
EXPORT_SYMBOL_GPL(sh7760_soc_platform);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SH7760 Audio DMA (DMABRG) driver");
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");

322
sound/soc/sh/hac.c Normal file
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@ -0,0 +1,322 @@
/*
* Hitachi Audio Controller (AC97) support for SH7760/SH7780
*
* Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
* licensed under the terms outlined in the file COPYING at the root
* of the linux kernel sources.
*
* dont forget to set IPSEL/OMSEL register bits (in your board code) to
* enable HAC output pins!
*/
/* BIG FAT FIXME: although the SH7760 has 2 independent AC97 units, only
* the FIRST can be used since ASoC does not pass any information to the
* ac97_read/write() functions regarding WHICH unit to use. You'll have
* to edit the code a bit to use the other AC97 unit. --mlau
*/
#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>
/* regs and bits */
#define HACCR 0x08
#define HACCSAR 0x20
#define HACCSDR 0x24
#define HACPCML 0x28
#define HACPCMR 0x2C
#define HACTIER 0x50
#define HACTSR 0x54
#define HACRIER 0x58
#define HACRSR 0x5C
#define HACACR 0x60
#define CR_CR (1 << 15) /* "codec-ready" indicator */
#define CR_CDRT (1 << 11) /* cold reset */
#define CR_WMRT (1 << 10) /* warm reset */
#define CR_B9 (1 << 9) /* the mysterious "bit 9" */
#define CR_ST (1 << 5) /* AC97 link start bit */
#define CSAR_RD (1 << 19) /* AC97 data read bit */
#define CSAR_WR (0)
#define TSR_CMDAMT (1 << 31)
#define TSR_CMDDMT (1 << 30)
#define RSR_STARY (1 << 22)
#define RSR_STDRY (1 << 21)
#define ACR_DMARX16 (1 << 30)
#define ACR_DMATX16 (1 << 29)
#define ACR_TX12ATOM (1 << 26)
#define ACR_DMARX20 ((1 << 24) | (1 << 22))
#define ACR_DMATX20 ((1 << 23) | (1 << 21))
#define CSDR_SHIFT 4
#define CSDR_MASK (0xffff << CSDR_SHIFT)
#define CSAR_SHIFT 12
#define CSAR_MASK (0x7f << CSAR_SHIFT)
#define AC97_WRITE_RETRY 1
#define AC97_READ_RETRY 5
/* manual-suggested AC97 codec access timeouts (us) */
#define TMO_E1 500 /* 21 < E1 < 1000 */
#define TMO_E2 13 /* 13 < E2 */
#define TMO_E3 21 /* 21 < E3 */
#define TMO_E4 500 /* 21 < E4 < 1000 */
struct hac_priv {
unsigned long mmio; /* HAC base address */
} hac_cpu_data[] = {
#if defined(CONFIG_CPU_SUBTYPE_SH7760)
{
.mmio = 0xFE240000,
},
{
.mmio = 0xFE250000,
},
#elif defined(CONFIG_CPU_SUBTYPE_SH7780)
{
.mmio = 0xFFE40000,
},
#else
#error "Unsupported SuperH SoC"
#endif
};
#define HACREG(reg) (*(unsigned long *)(hac->mmio + (reg)))
/*
* AC97 read/write flow as outlined in the SH7760 manual (pages 903-906)
*/
static int hac_get_codec_data(struct hac_priv *hac, unsigned short r,
unsigned short *v)
{
unsigned int to1, to2, i;
unsigned short adr;
for (i = 0; i < AC97_READ_RETRY; ++i) {
*v = 0;
/* wait for HAC to receive something from the codec */
for (to1 = TMO_E4;
to1 && !(HACREG(HACRSR) & RSR_STARY);
--to1)
udelay(1);
for (to2 = TMO_E4;
to2 && !(HACREG(HACRSR) & RSR_STDRY);
--to2)
udelay(1);
if (!to1 && !to2)
return 0; /* codec comm is down */
adr = ((HACREG(HACCSAR) & CSAR_MASK) >> CSAR_SHIFT);
*v = ((HACREG(HACCSDR) & CSDR_MASK) >> CSDR_SHIFT);
HACREG(HACRSR) &= ~(RSR_STDRY | RSR_STARY);
if (r == adr)
break;
/* manual says: wait at least 21 usec before retrying */
udelay(21);
}
HACREG(HACRSR) &= ~(RSR_STDRY | RSR_STARY);
return (i < AC97_READ_RETRY);
}
static unsigned short hac_read_codec_aux(struct hac_priv *hac,
unsigned short reg)
{
unsigned short val;
unsigned int i, to;
for (i = 0; i < AC97_READ_RETRY; i++) {
/* send_read_request */
local_irq_disable();
HACREG(HACTSR) &= ~(TSR_CMDAMT);
HACREG(HACCSAR) = (reg << CSAR_SHIFT) | CSAR_RD;
local_irq_enable();
for (to = TMO_E3;
to && !(HACREG(HACTSR) & TSR_CMDAMT);
--to)
udelay(1);
HACREG(HACTSR) &= ~TSR_CMDAMT;
val = 0;
if (hac_get_codec_data(hac, reg, &val) != 0)
break;
}
if (i == AC97_READ_RETRY)
return ~0;
return val;
}
static void hac_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
unsigned short val)
{
int unit_id = 0 /* ac97->private_data */;
struct hac_priv *hac = &hac_cpu_data[unit_id];
unsigned int i, to;
/* write_codec_aux */
for (i = 0; i < AC97_WRITE_RETRY; i++) {
/* send_write_request */
local_irq_disable();
HACREG(HACTSR) &= ~(TSR_CMDDMT | TSR_CMDAMT);
HACREG(HACCSDR) = (val << CSDR_SHIFT);
HACREG(HACCSAR) = (reg << CSAR_SHIFT) & (~CSAR_RD);
local_irq_enable();
/* poll-wait for CMDAMT and CMDDMT */
for (to = TMO_E1;
to && !(HACREG(HACTSR) & (TSR_CMDAMT|TSR_CMDDMT));
--to)
udelay(1);
HACREG(HACTSR) &= ~(TSR_CMDAMT | TSR_CMDDMT);
if (to)
break;
/* timeout, try again */
}
}
static unsigned short hac_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
int unit_id = 0 /* ac97->private_data */;
struct hac_priv *hac = &hac_cpu_data[unit_id];
return hac_read_codec_aux(hac, reg);
}
static void hac_ac97_warmrst(struct snd_ac97 *ac97)
{
int unit_id = 0 /* ac97->private_data */;
struct hac_priv *hac = &hac_cpu_data[unit_id];
unsigned int tmo;
HACREG(HACCR) = CR_WMRT | CR_ST | CR_B9;
msleep(10);
HACREG(HACCR) = CR_ST | CR_B9;
for (tmo = 1000; (tmo > 0) && !(HACREG(HACCR) & CR_CR); tmo--)
udelay(1);
if (!tmo)
printk(KERN_INFO "hac: reset: AC97 link down!\n");
/* settings this bit lets us have a conversation with codec */
HACREG(HACACR) |= ACR_TX12ATOM;
}
static void hac_ac97_coldrst(struct snd_ac97 *ac97)
{
int unit_id = 0 /* ac97->private_data */;
struct hac_priv *hac;
hac = &hac_cpu_data[unit_id];
HACREG(HACCR) = 0;
HACREG(HACCR) = CR_CDRT | CR_ST | CR_B9;
msleep(10);
hac_ac97_warmrst(ac97);
}
struct snd_ac97_bus_ops soc_ac97_ops = {
.read = hac_ac97_read,
.write = hac_ac97_write,
.reset = hac_ac97_coldrst,
.warm_reset = hac_ac97_warmrst,
};
EXPORT_SYMBOL_GPL(soc_ac97_ops);
static int hac_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct hac_priv *hac = &hac_cpu_data[rtd->dai->cpu_dai->id];
int d = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
switch (params->msbits) {
case 16:
HACREG(HACACR) |= d ? ACR_DMARX16 : ACR_DMATX16;
HACREG(HACACR) &= d ? ~ACR_DMARX20 : ~ACR_DMATX20;
break;
case 20:
HACREG(HACACR) &= d ? ~ACR_DMARX16 : ~ACR_DMATX16;
HACREG(HACACR) |= d ? ACR_DMARX20 : ACR_DMATX20;
break;
default:
pr_debug("hac: invalid depth %d bit\n", params->msbits);
return -EINVAL;
break;
}
return 0;
}
#define AC97_RATES \
SNDRV_PCM_RATE_8000_192000
#define AC97_FMTS \
SNDRV_PCM_FMTBIT_S16_LE
struct snd_soc_cpu_dai sh4_hac_dai[] = {
{
.name = "HAC0",
.id = 0,
.type = SND_SOC_DAI_AC97,
.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,
},
.ops = {
.hw_params = hac_hw_params,
},
},
#ifdef CONFIG_CPU_SUBTYPE_SH7760
{
.name = "HAC1",
.id = 1,
.type = SND_SOC_DAI_AC97,
.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,
},
.ops = {
.hw_params = hac_hw_params,
},
},
#endif
};
EXPORT_SYMBOL_GPL(sh4_hac_dai);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SuperH onchip HAC (AC97) audio driver");
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");

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sound/soc/sh/sh7760-ac97.c Normal file
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/*
* Generic AC97 sound support for SH7760
*
* (c) 2007 Manuel Lauss
*
* Licensed under the GPLv2.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/io.h>
#include "../codecs/ac97.h"
#define IPSEL 0xFE400034
/* platform specific structs can be declared here */
extern struct snd_soc_cpu_dai sh4_hac_dai[2];
extern struct snd_soc_platform sh7760_soc_platform;
static int machine_init(struct snd_soc_codec *codec)
{
snd_soc_dapm_sync_endpoints(codec);
return 0;
}
static struct snd_soc_dai_link sh7760_ac97_dai = {
.name = "AC97",
.stream_name = "AC97 HiFi",
.cpu_dai = &sh4_hac_dai[0], /* HAC0 */
.codec_dai = &ac97_dai,
.init = machine_init,
.ops = NULL,
};
static struct snd_soc_machine sh7760_ac97_soc_machine = {
.name = "SH7760 AC97",
.dai_link = &sh7760_ac97_dai,
.num_links = 1,
};
static struct snd_soc_device sh7760_ac97_snd_devdata = {
.machine = &sh7760_ac97_soc_machine,
.platform = &sh7760_soc_platform,
.codec_dev = &soc_codec_dev_ac97,
};
static struct platform_device *sh7760_ac97_snd_device;
static int __init sh7760_ac97_init(void)
{
int ret;
unsigned short ipsel;
/* enable both AC97 controllers in pinmux reg */
ipsel = ctrl_inw(IPSEL);
ctrl_outw(ipsel | (3 << 10), IPSEL);
ret = -ENOMEM;
sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1);
if (!sh7760_ac97_snd_device)
goto out;
platform_set_drvdata(sh7760_ac97_snd_device,
&sh7760_ac97_snd_devdata);
sh7760_ac97_snd_devdata.dev = &sh7760_ac97_snd_device->dev;
ret = platform_device_add(sh7760_ac97_snd_device);
if (ret)
platform_device_put(sh7760_ac97_snd_device);
out:
return ret;
}
static void __exit sh7760_ac97_exit(void)
{
platform_device_unregister(sh7760_ac97_snd_device);
}
module_init(sh7760_ac97_init);
module_exit(sh7760_ac97_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");

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/*
* Serial Sound Interface (I2S) support for SH7760/SH7780
*
* Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
*
* licensed under the terms outlined in the file COPYING at the root
* of the linux kernel sources.
*
* dont forget to set IPSEL/OMSEL register bits (in your board code) to
* enable SSI output pins!
*/
/*
* LIMITATIONS:
* The SSI unit has only one physical data line, so full duplex is
* impossible. This can be remedied on the SH7760 by using the
* other SSI unit for recording; however the SH7780 has only 1 SSI
* unit, and its pins are shared with the AC97 unit, among others.
*
* FEATURES:
* The SSI features "compressed mode": in this mode it continuously
* streams PCM data over the I2S lines and uses LRCK as a handshake
* signal. Can be used to send compressed data (AC3/DTS) to a DSP.
* The number of bits sent over the wire in a frame can be adjusted
* and can be independent from the actual sample bit depth. This is
* useful to support TDM mode codecs like the AD1939 which have a
* fixed TDM slot size, regardless of sample resolution.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/io.h>
#define SSICR 0x00
#define SSISR 0x04
#define CR_DMAEN (1 << 28)
#define CR_CHNL_SHIFT 22
#define CR_CHNL_MASK (3 << CR_CHNL_SHIFT)
#define CR_DWL_SHIFT 19
#define CR_DWL_MASK (7 << CR_DWL_SHIFT)
#define CR_SWL_SHIFT 16
#define CR_SWL_MASK (7 << CR_SWL_SHIFT)
#define CR_SCK_MASTER (1 << 15) /* bitclock master bit */
#define CR_SWS_MASTER (1 << 14) /* wordselect master bit */
#define CR_SCKP (1 << 13) /* I2Sclock polarity */
#define CR_SWSP (1 << 12) /* LRCK polarity */
#define CR_SPDP (1 << 11)
#define CR_SDTA (1 << 10) /* i2s alignment (msb/lsb) */
#define CR_PDTA (1 << 9) /* fifo data alignment */
#define CR_DEL (1 << 8) /* delay data by 1 i2sclk */
#define CR_BREN (1 << 7) /* clock gating in burst mode */
#define CR_CKDIV_SHIFT 4
#define CR_CKDIV_MASK (7 << CR_CKDIV_SHIFT) /* bitclock divider */
#define CR_MUTE (1 << 3) /* SSI mute */
#define CR_CPEN (1 << 2) /* compressed mode */
#define CR_TRMD (1 << 1) /* transmit/receive select */
#define CR_EN (1 << 0) /* enable SSI */
#define SSIREG(reg) (*(unsigned long *)(ssi->mmio + (reg)))
struct ssi_priv {
unsigned long mmio;
unsigned long sysclk;
int inuse;
} ssi_cpu_data[] = {
#if defined(CONFIG_CPU_SUBTYPE_SH7760)
{
.mmio = 0xFE680000,
},
{
.mmio = 0xFE690000,
},
#elif defined(CONFIG_CPU_SUBTYPE_SH7780)
{
.mmio = 0xFFE70000,
},
#else
#error "Unsupported SuperH SoC"
#endif
};
/*
* track usage of the SSI; it is simplex-only so prevent attempts of
* concurrent playback + capture. FIXME: any locking required?
*/
static int ssi_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id];
if (ssi->inuse) {
pr_debug("ssi: already in use!\n");
return -EBUSY;
} else
ssi->inuse = 1;
return 0;
}
static void ssi_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id];
ssi->inuse = 0;
}
static int ssi_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id];
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
SSIREG(SSICR) |= CR_DMAEN | CR_EN;
break;
case SNDRV_PCM_TRIGGER_STOP:
SSIREG(SSICR) &= ~(CR_DMAEN | CR_EN);
break;
default:
return -EINVAL;
}
return 0;
}
static int ssi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct ssi_priv *ssi = &ssi_cpu_data[rtd->dai->cpu_dai->id];
unsigned long ssicr = SSIREG(SSICR);
unsigned int bits, channels, swl, recv, i;
channels = params_channels(params);
bits = params->msbits;
recv = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 0 : 1;
pr_debug("ssi_hw_params() enter\nssicr was %08lx\n", ssicr);
pr_debug("bits: %d channels: %d\n", bits, channels);
ssicr &= ~(CR_TRMD | CR_CHNL_MASK | CR_DWL_MASK | CR_PDTA |
CR_SWL_MASK);
/* direction (send/receive) */
if (!recv)
ssicr |= CR_TRMD; /* transmit */
/* channels */
if ((channels < 2) || (channels > 8) || (channels & 1)) {
pr_debug("ssi: invalid number of channels\n");
return -EINVAL;
}
ssicr |= ((channels >> 1) - 1) << CR_CHNL_SHIFT;
/* DATA WORD LENGTH (DWL): databits in audio sample */
i = 0;
switch (bits) {
case 32: ++i;
case 24: ++i;
case 22: ++i;
case 20: ++i;
case 18: ++i;
case 16: ++i;
ssicr |= i << CR_DWL_SHIFT;
case 8: break;
default:
pr_debug("ssi: invalid sample width\n");
return -EINVAL;
}
/*
* SYSTEM WORD LENGTH: size in bits of half a frame over the I2S
* wires. This is usually bits_per_sample x channels/2; i.e. in
* Stereo mode the SWL equals DWL. SWL can be bigger than the
* product of (channels_per_slot x samplebits), e.g. for codecs
* like the AD1939 which only accept 32bit wide TDM slots. For
* "standard" I2S operation we set SWL = chans / 2 * DWL here.
* Waiting for ASoC to get TDM support ;-)
*/
if ((bits > 16) && (bits <= 24)) {
bits = 24; /* these are padded by the SSI */
/*ssicr |= CR_PDTA;*/ /* cpu/data endianness ? */
}
i = 0;
swl = (bits * channels) / 2;
switch (swl) {
case 256: ++i;
case 128: ++i;
case 64: ++i;
case 48: ++i;
case 32: ++i;
case 16: ++i;
ssicr |= i << CR_SWL_SHIFT;
case 8: break;
default:
pr_debug("ssi: invalid system word length computed\n");
return -EINVAL;
}
SSIREG(SSICR) = ssicr;
pr_debug("ssi_hw_params() leave\nssicr is now %08lx\n", ssicr);
return 0;
}
static int ssi_set_sysclk(struct snd_soc_cpu_dai *cpu_dai, int clk_id,
unsigned int freq, int dir)
{
struct ssi_priv *ssi = &ssi_cpu_data[cpu_dai->id];
ssi->sysclk = freq;
return 0;
}
/*
* This divider is used to generate the SSI_SCK (I2S bitclock) from the
* clock at the HAC_BIT_CLK ("oversampling clock") pin.
*/
static int ssi_set_clkdiv(struct snd_soc_cpu_dai *dai, int did, int div)
{
struct ssi_priv *ssi = &ssi_cpu_data[dai->id];
unsigned long ssicr;
int i;
i = 0;
ssicr = SSIREG(SSICR) & ~CR_CKDIV_MASK;
switch (div) {
case 16: ++i;
case 8: ++i;
case 4: ++i;
case 2: ++i;
SSIREG(SSICR) = ssicr | (i << CR_CKDIV_SHIFT);
case 1: break;
default:
pr_debug("ssi: invalid sck divider %d\n", div);
return -EINVAL;
}
return 0;
}
static int ssi_set_fmt(struct snd_soc_cpu_dai *dai, unsigned int fmt)
{
struct ssi_priv *ssi = &ssi_cpu_data[dai->id];
unsigned long ssicr = SSIREG(SSICR);
pr_debug("ssi_set_fmt()\nssicr was 0x%08lx\n", ssicr);
ssicr &= ~(CR_DEL | CR_PDTA | CR_BREN | CR_SWSP | CR_SCKP |
CR_SWS_MASTER | CR_SCK_MASTER);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
break;
case SND_SOC_DAIFMT_RIGHT_J:
ssicr |= CR_DEL | CR_PDTA;
break;
case SND_SOC_DAIFMT_LEFT_J:
ssicr |= CR_DEL;
break;
default:
pr_debug("ssi: unsupported format\n");
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
case SND_SOC_DAIFMT_CONT:
break;
case SND_SOC_DAIFMT_GATED:
ssicr |= CR_BREN;
break;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
ssicr |= CR_SCKP; /* sample data at low clkedge */
break;
case SND_SOC_DAIFMT_NB_IF:
ssicr |= CR_SCKP | CR_SWSP;
break;
case SND_SOC_DAIFMT_IB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
ssicr |= CR_SWSP; /* word select starts low */
break;
default:
pr_debug("ssi: invalid inversion\n");
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
break;
case SND_SOC_DAIFMT_CBS_CFM:
ssicr |= CR_SCK_MASTER;
break;
case SND_SOC_DAIFMT_CBM_CFS:
ssicr |= CR_SWS_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS:
ssicr |= CR_SWS_MASTER | CR_SCK_MASTER;
break;
default:
pr_debug("ssi: invalid master/slave configuration\n");
return -EINVAL;
}
SSIREG(SSICR) = ssicr;
pr_debug("ssi_set_fmt() leave\nssicr is now 0x%08lx\n", ssicr);
return 0;
}
/* the SSI depends on an external clocksource (at HAC_BIT_CLK) even in
* Master mode, so really this is board specific; the SSI can do any
* rate with the right bitclk and divider settings.
*/
#define SSI_RATES \
SNDRV_PCM_RATE_8000_192000
/* the SSI can do 8-32 bit samples, with 8 possible channels */
#define SSI_FMTS \
(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE | \
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3LE | \
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE)
struct snd_soc_cpu_dai sh4_ssi_dai[] = {
{
.name = "SSI0",
.id = 0,
.type = SND_SOC_DAI_I2S,
.playback = {
.rates = SSI_RATES,
.formats = SSI_FMTS,
.channels_min = 2,
.channels_max = 8,
},
.capture = {
.rates = SSI_RATES,
.formats = SSI_FMTS,
.channels_min = 2,
.channels_max = 8,
},
.ops = {
.startup = ssi_startup,
.shutdown = ssi_shutdown,
.trigger = ssi_trigger,
.hw_params = ssi_hw_params,
},
.dai_ops = {
.set_sysclk = ssi_set_sysclk,
.set_clkdiv = ssi_set_clkdiv,
.set_fmt = ssi_set_fmt,
},
},
#ifdef CONFIG_CPU_SUBTYPE_SH7760
{
.name = "SSI1",
.id = 1,
.type = SND_SOC_DAI_I2S,
.playback = {
.rates = SSI_RATES,
.formats = SSI_FMTS,
.channels_min = 2,
.channels_max = 8,
},
.capture = {
.rates = SSI_RATES,
.formats = SSI_FMTS,
.channels_min = 2,
.channels_max = 8,
},
.ops = {
.startup = ssi_startup,
.shutdown = ssi_shutdown,
.trigger = ssi_trigger,
.hw_params = ssi_hw_params,
},
.dai_ops = {
.set_sysclk = ssi_set_sysclk,
.set_clkdiv = ssi_set_clkdiv,
.set_fmt = ssi_set_fmt,
},
},
#endif
};
EXPORT_SYMBOL_GPL(sh4_ssi_dai);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SuperH onchip SSI (I2S) audio driver");
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");