ASoC: mcbsp: Add McBSP support for OMAP4

This patch adds McBSP support for the OMAP4 CPU

Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
Signed-off-by: Margarita Olaya Cabrera <magi.olaya@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

2 files changed, 36 insertions, 3 deletions

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index 7e84f24b9a88..d203f4da18a0 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -102,6 +102,17 @@ static const int omap24xx_dma_reqs[][2] = {
 static const int omap24xx_dma_reqs[][2] = {};
 #endif
 
+#if defined(CONFIG_ARCH_OMAP4)
+static const int omap44xx_dma_reqs[][2] = {
+        { OMAP44XX_DMA_MCBSP1_TX, OMAP44XX_DMA_MCBSP1_RX },
+        { OMAP44XX_DMA_MCBSP2_TX, OMAP44XX_DMA_MCBSP2_RX },
+        { OMAP44XX_DMA_MCBSP3_TX, OMAP44XX_DMA_MCBSP3_RX },
+        { OMAP44XX_DMA_MCBSP4_TX, OMAP44XX_DMA_MCBSP4_RX },
+};
+#else
+static const int omap44xx_dma_reqs[][2] = {};
+#endif
+
 #if defined(CONFIG_ARCH_OMAP2420)
 static const unsigned long omap2420_mcbsp_port[][2] = {
         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
@@ -147,6 +158,21 @@ static const unsigned long omap34xx_mcbsp_port[][2] = {
 static const unsigned long omap34xx_mcbsp_port[][2] = {};
 #endif
 
+#if defined(CONFIG_ARCH_OMAP4)
+static const unsigned long omap44xx_mcbsp_port[][2] = {
+        { OMAP44XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
+          OMAP44XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
+        { OMAP44XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
+          OMAP44XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
+        { OMAP44XX_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
+          OMAP44XX_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
+        { OMAP44XX_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
+          OMAP44XX_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
+};
+#else
+static const unsigned long omap44xx_mcbsp_port[][2] = {};
+#endif
+
 static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
 {
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
@@ -224,7 +250,7 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
          * 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
          * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
          */
-        if (cpu_is_omap343x()) {
+        if (cpu_is_omap343x() || cpu_is_omap44xx()) {
                 /*
                 * Rule for the buffer size. We should not allow
                 * smaller buffer than the FIFO size to avoid underruns
@@ -332,6 +358,9 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
         } else if (cpu_is_omap343x()) {
                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
                 port = omap34xx_mcbsp_port[bus_id][substream->stream];
+         } else if (cpu_is_omap44xx()) {
+                dma = omap44xx_dma_reqs[bus_id][substream->stream];
+                port = omap44xx_mcbsp_port[bus_id][substream->stream];
         } else {
                 return -ENODEV;
         }
@@ -498,11 +527,11 @@ static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
         regs->spcr2     |= XINTM(3) | FREE;
         regs->spcr1     |= RINTM(3);
         /* RFIG and XFIG are not defined in 34xx */
-        if (!cpu_is_omap34xx()) {
+        if (!cpu_is_omap34xx() && !cpu_is_omap44xx()) {
                 regs->rcr2      |= RFIG;
                 regs->xcr2      |= XFIG;
         }
-        if (cpu_is_omap2430() || cpu_is_omap34xx()) {
+        if (cpu_is_omap2430() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
                 regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE;
                 regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE;
         }
diff --git a/sound/soc/omap/omap-mcbsp.h b/sound/soc/omap/omap-mcbsp.h
index ffdcc5abb7b9..110c106611d3 100644
--- a/sound/soc/omap/omap-mcbsp.h
+++ b/sound/soc/omap/omap-mcbsp.h
@@ -50,6 +50,10 @@ enum omap_mcbsp_div {
 #undef  NUM_LINKS
 #define NUM_LINKS       3
 #endif
+#if defined(CONFIG_ARCH_OMAP4)
+#undef  NUM_LINKS
+#define NUM_LINKS       4
+#endif
 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3)
 #undef  NUM_LINKS
 #define NUM_LINKS       5