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| author | Rafael Ignacio Zurita <rizurita@yahoo.com> | 2009-11-03 21:16:27 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-04 09:17:40 +0100 |
| commit | 9dcaa7b25f2c8f6a0485854cd3641f585a154072 (patch) | |
| tree | 1f3453a235682f5ba4b4357633f3546a4dbf4e2b /arch/sh/boards/mach-hp6xx | |
| parent | ALSA: snd-pcsp: add nopcm mode (diff) | |
| download | linux-9dcaa7b25f2c8f6a0485854cd3641f585a154072.tar.xz linux-9dcaa7b25f2c8f6a0485854cd3641f585a154072.zip | |
ALSA: sh: add SuperH DAC audio driver for ALSA V4
This is a port of the sound/oss/sh_dac_audio.c driver.
The driver uses an on-chip 8-bit D/A converter, which has a speaker connected
to one of its channels, found in several ancient HP machines.
For interrupts it uses a high-resolution timer (hrtimer).
Tested on SH7709 based hp6xx (HP Jornada 680/690 and HP Palmtop 620lx/660lx).
Also, since OSS Emulation works, the old OSS sound/oss/sh_dac_audio.c driver
would be obsolete soon, and it could be removed.
Signed-off-by: Rafael Ignacio Zurita <rizurita@yahoo.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'arch/sh/boards/mach-hp6xx')
| -rw-r--r-- | arch/sh/boards/mach-hp6xx/setup.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-hp6xx/setup.c b/arch/sh/boards/mach-hp6xx/setup.c index 8f305b36358b..e6dd5e96321e 100644 --- a/arch/sh/boards/mach-hp6xx/setup.c +++ b/arch/sh/boards/mach-hp6xx/setup.c @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/irq.h> +#include <sound/sh_dac_audio.h> #include <asm/hd64461.h> #include <asm/io.h> #include <mach/hp6xx.h> @@ -51,9 +52,63 @@ static struct platform_device jornadakbd_device = { .id = -1, }; +static void dac_audio_start(struct dac_audio_pdata *pdata) +{ + u16 v; + u8 v8; + + /* HP Jornada 680/690 speaker on */ + v = inw(HD64461_GPADR); + v &= ~HD64461_GPADR_SPEAKER; + outw(v, HD64461_GPADR); + + /* HP Palmtop 620lx/660lx speaker on */ + v8 = inb(PKDR); + v8 &= ~PKDR_SPEAKER; + outb(v8, PKDR); + + sh_dac_enable(pdata->channel); +} + +static void dac_audio_stop(struct dac_audio_pdata *pdata) +{ + u16 v; + u8 v8; + + /* HP Jornada 680/690 speaker off */ + v = inw(HD64461_GPADR); + v |= HD64461_GPADR_SPEAKER; + outw(v, HD64461_GPADR); + + /* HP Palmtop 620lx/660lx speaker off */ + v8 = inb(PKDR); + v8 |= PKDR_SPEAKER; + outb(v8, PKDR); + + sh_dac_output(0, pdata->channel); + sh_dac_disable(pdata->channel); +} + +static struct dac_audio_pdata dac_audio_platform_data = { + .buffer_size = 64000, + .channel = 1, + .start = dac_audio_start, + .stop = dac_audio_stop, +}; + +static struct platform_device dac_audio_device = { + .name = "dac_audio", + .id = -1, + .dev = { + .platform_data = &dac_audio_platform_data, + } + +}; + static struct platform_device *hp6xx_devices[] __initdata = { &cf_ide_device, &jornadakbd_device, + &dac_audio_device, }; static void __init hp6xx_init_irq(void) |