OMAP3: McBSP: Change the way how the FIFO is handled

Use the actual FIFO size in words as buffer_size on OMAP3.
Change the threshold configuration to use 1 based numbering, when
specifying the allowed threshold maximum or the McBSP threshold value.
Set the default maximum threshold to (buffer_size - 0x10) intialy.
>From users of McBSP, now it is expected to use this method.
Asking for threshold 1 means that the value written to threshold registers
are going to be 0, which means 1 word threshold.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolsfonmicro.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 5 insertions, 5 deletions

diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c
index c29337074ad3..8fb5e5345557 100644
--- a/arch/arm/mach-omap2/mcbsp.c
+++ b/arch/arm/mach-omap2/mcbsp.c
@@ -133,7 +133,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
                 .ops            = &omap2_mcbsp_ops,
-                .buffer_size    = 0x6F,
+                .buffer_size    = 0x80, /* The FIFO has 128 locations */
         },
         {
                 .phys_base      = OMAP34XX_MCBSP2_BASE,
@@ -143,7 +143,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
                 .ops            = &omap2_mcbsp_ops,
-                .buffer_size    = 0x3FF,
+                .buffer_size    = 0x500, /* The FIFO has 1024 + 256 locations */
         },
         {
                 .phys_base      = OMAP34XX_MCBSP3_BASE,
@@ -153,7 +153,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
                 .rx_irq         = INT_24XX_MCBSP3_IRQ_RX,
                 .tx_irq         = INT_24XX_MCBSP3_IRQ_TX,
                 .ops            = &omap2_mcbsp_ops,
-                .buffer_size    = 0x6F,
+                .buffer_size    = 0x80, /* The FIFO has 128 locations */
         },
         {
                 .phys_base      = OMAP34XX_MCBSP4_BASE,
@@ -162,7 +162,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
                 .rx_irq         = INT_24XX_MCBSP4_IRQ_RX,
                 .tx_irq         = INT_24XX_MCBSP4_IRQ_TX,
                 .ops            = &omap2_mcbsp_ops,
-                .buffer_size    = 0x6F,
+                .buffer_size    = 0x80, /* The FIFO has 128 locations */
         },
         {
                 .phys_base      = OMAP34XX_MCBSP5_BASE,
@@ -171,7 +171,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
                 .rx_irq         = INT_24XX_MCBSP5_IRQ_RX,
                 .tx_irq         = INT_24XX_MCBSP5_IRQ_TX,
                 .ops            = &omap2_mcbsp_ops,
-                .buffer_size    = 0x6F,
+                .buffer_size    = 0x80, /* The FIFO has 128 locations */
         },
 };
 #define OMAP34XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap34xx_mcbsp_pdata)