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ARM: OMAP: McBSP: Merge two functions into omap_mcbsp_start/_stop 

Functionality of functions omap_mcbsp_xmit_enable and omap_mcbsp_recv_enable
can be merged into omap_mcbsp_start and omap_mcbsp_stop since API of
those omap_mcbsp_start and omap_mcbsp_stop was changed recently allowing
to start and stop individually the transmitter and receiver.

This cleans up the code in arch/arm/plat-omap/mcbsp.c and in
sound/soc/omap/omap-mcbsp.c which was the only user for those removed
functions.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Jarkko Nikula 2009-08-23 12:24:27 +03:00 committed by Mark Brown
parent 32080af7a6
commit d09a2afc93
3 changed files with 28 additions and 63 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/plat-omap/include/mach/mcbsp.h
View File

@ -436,8 +436,6 @@ int omap_mcbsp_request(unsigned int id);
void omap_mcbsp_free(unsigned int id);
void omap_mcbsp_start(unsigned int id, int tx, int rx);
void omap_mcbsp_stop(unsigned int id, int tx, int rx);
void omap_mcbsp_xmit_enable(unsigned int id, u8 enable);
void omap_mcbsp_recv_enable(unsigned int id, u8 enable);
void omap_mcbsp_xmit_word(unsigned int id, u32 word);
u32 omap_mcbsp_recv_word(unsigned int id);

84
arch/arm/plat-omap/mcbsp.c
View File

@ -529,11 +529,13 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
}
/* Enable transmitter and receiver */
tx &= 1;
w = OMAP_MCBSP_READ(io_base, SPCR2);
OMAP_MCBSP_WRITE(io_base, SPCR2, w | (tx & 1));
OMAP_MCBSP_WRITE(io_base, SPCR2, w | tx);
rx &= 1;
w = OMAP_MCBSP_READ(io_base, SPCR1);
OMAP_MCBSP_WRITE(io_base, SPCR1, w | (rx & 1));
OMAP_MCBSP_WRITE(io_base, SPCR1, w | rx);
/*
* Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec
@ -549,6 +551,16 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7));
}
if (cpu_is_omap2430() || cpu_is_omap34xx()) {
/* Release the transmitter and receiver */
w = OMAP_MCBSP_READ(io_base, XCCR);
w &= ~(tx ? XDISABLE : 0);
OMAP_MCBSP_WRITE(io_base, XCCR, w);
w = OMAP_MCBSP_READ(io_base, RCCR);
w &= ~(rx ? RDISABLE : 0);
OMAP_MCBSP_WRITE(io_base, RCCR, w);
}
/* Dump McBSP Regs */
omap_mcbsp_dump_reg(id);
}
@ -570,12 +582,24 @@ void omap_mcbsp_stop(unsigned int id, int tx, int rx)
io_base = mcbsp->io_base;
/* Reset transmitter */
tx &= 1;
if (cpu_is_omap2430() || cpu_is_omap34xx()) {
w = OMAP_MCBSP_READ(io_base, XCCR);
w |= (tx ? XDISABLE : 0);
OMAP_MCBSP_WRITE(io_base, XCCR, w);
}
w = OMAP_MCBSP_READ(io_base, SPCR2);
OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(tx & 1));
OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~tx);
/* Reset receiver */
rx &= 1;
if (cpu_is_omap2430() || cpu_is_omap34xx()) {
w = OMAP_MCBSP_READ(io_base, RCCR);
w |= (tx ? RDISABLE : 0);
OMAP_MCBSP_WRITE(io_base, RCCR, w);
}
w = OMAP_MCBSP_READ(io_base, SPCR1);
OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(rx & 1));
OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~rx);
idle = !((OMAP_MCBSP_READ(io_base, SPCR2) |
OMAP_MCBSP_READ(io_base, SPCR1)) & 1);
@ -588,58 +612,6 @@ void omap_mcbsp_stop(unsigned int id, int tx, int rx)
}
EXPORT_SYMBOL(omap_mcbsp_stop);
void omap_mcbsp_xmit_enable(unsigned int id, u8 enable)
{
struct omap_mcbsp *mcbsp;
void __iomem *io_base;
u16 w;
if (!(cpu_is_omap2430() || cpu_is_omap34xx()))
return;
if (!omap_mcbsp_check_valid_id(id)) {
printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
return;
}
mcbsp = id_to_mcbsp_ptr(id);
io_base = mcbsp->io_base;
w = OMAP_MCBSP_READ(io_base, XCCR);
if (enable)
OMAP_MCBSP_WRITE(io_base, XCCR, w & ~(XDISABLE));
else
OMAP_MCBSP_WRITE(io_base, XCCR, w | XDISABLE);
}
EXPORT_SYMBOL(omap_mcbsp_xmit_enable);
void omap_mcbsp_recv_enable(unsigned int id, u8 enable)
{
struct omap_mcbsp *mcbsp;
void __iomem *io_base;
u16 w;
if (!(cpu_is_omap2430() || cpu_is_omap34xx()))
return;
if (!omap_mcbsp_check_valid_id(id)) {
printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
return;
}
mcbsp = id_to_mcbsp_ptr(id);
io_base = mcbsp->io_base;
w = OMAP_MCBSP_READ(io_base, RCCR);
if (enable)
OMAP_MCBSP_WRITE(io_base, RCCR, w & ~(RDISABLE));
else
OMAP_MCBSP_WRITE(io_base, RCCR, w | RDISABLE);
}
EXPORT_SYMBOL(omap_mcbsp_recv_enable);
/* polled mcbsp i/o operations */
int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
{

5
sound/soc/omap/omap-mcbsp.c
View File

@ -231,11 +231,6 @@ static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
mcbsp_data->active++;
omap_mcbsp_start(mcbsp_data->bus_id, play, !play);
/* Make sure data transfer is frame synchronized */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
omap_mcbsp_xmit_enable(mcbsp_data->bus_id, 1);
else
omap_mcbsp_recv_enable(mcbsp_data->bus_id, 1);
break;
case SNDRV_PCM_TRIGGER_STOP: