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ARM: OMAP: Fix ASoC by enabling writes to XCCR and RCCR McBSP registers, v3 

This patch enables writing to McBSP Transmit Configuration Control
Register (XCCR) and Receive Configuration Control Register (RCCR)
for 2430/34xx platforms. It also adds XCCR, RCCR entries in McBSP
register configuration structure and bit definitions for both
registers.

If we enable the writing to CCR registers for 2430/34xx and don't
set the default values (setting 0 as a consequence) in ASoC driver,
the Transmit/Receive DMA mode gets disabled and the the
transmission/reception doesn't happen, ending with a
"write error: Input/Output error" when playing with 'aplay'.

Also define dummy CCR registers for omap1.

Cc: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Misael Lopez Cruz <x0052729@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2009-01-15 13:09:54 +02:00 committed by Tony Lindgren
parent 9b4a357787
commit 3127f8f859
2 changed files with 15 additions and 0 deletions
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11
arch/arm/plat-omap/include/mach/mcbsp.h
View File

@ -87,6 +87,10 @@
#define OMAP_MCBSP_REG_XCERG 0x3A
#define OMAP_MCBSP_REG_XCERH 0x3C
/* Dummy defines, these are not available on omap1 */
#define OMAP_MCBSP_REG_XCCR 0x00
#define OMAP_MCBSP_REG_RCCR 0x00
#define AUDIO_MCBSP_DATAWRITE (OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1)
#define AUDIO_MCBSP_DATAREAD (OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1)
@ -231,11 +235,16 @@
#define XPBBLK(value) ((value)<<7) /* Bits 7:8 */
/*********************** McBSP XCCR bit definitions *************************/
#define EXTCLKGATE 0x8000
#define PPCONNECT 0x4000
#define DXENDLY(value) ((value)<<12) /* Bits 12:13 */
#define XFULL_CYCLE 0x0800
#define DILB 0x0020
#define XDMAEN 0x0008
#define XDISABLE 0x0001
/********************** McBSP RCCR bit definitions *************************/
#define RFULL_CYCLE 0x0800
#define RDMAEN 0x0008
#define RDISABLE 0x0001
@ -267,6 +276,8 @@ struct omap_mcbsp_reg_cfg {
u16 rcerh;
u16 xcerg;
u16 xcerh;
u16 xccr;
u16 rccr;
};
typedef enum {

4
arch/arm/plat-omap/mcbsp.c
View File

@ -173,6 +173,10 @@ void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config)
OMAP_MCBSP_WRITE(io_base, MCR2, config->mcr2);
OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1);
OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0);
if (cpu_is_omap2430() || cpu_is_omap34xx()) {
OMAP_MCBSP_WRITE(io_base, XCCR, config->xccr);
OMAP_MCBSP_WRITE(io_base, RCCR, config->rccr);
}
}
EXPORT_SYMBOL(omap_mcbsp_config);