[alsa-devel] [PATCH v4 2/9] davinci: EDMA support for Omapl138-Hawkboard

[vm.rod25 at gmail.com]

From: Victor Rodriguez <victor.rodriguez at sasken.com>

This patch adds EDMA support for the Hawkboard-L138 system

Signed-off-by: Victor Rodriguez <victor.rodriguez at sasken.com>
---
 arch/arm/mach-davinci/board-omapl138-hawk.c |   54 +++++++++++++++++++++++++++
 1 files changed, 54 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index 2220105..5a645ad 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -67,6 +67,55 @@ static __init void omapl138_hawk_config_emac(void)
 		return;
 }
 
+/*
+ * The following EDMA channels/slots are not being used by drivers (for
+ * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
+ * hence they are being reserved for codecs on the DSP side.
+ */
+static const s16 da850_dma0_rsv_chans[][2] = {
+	/* (offset, number) */
+	{ 8,  6},
+	{24,  4},
+	{30,  2},
+	{-1, -1}
+};
+
+static const s16 da850_dma0_rsv_slots[][2] = {
+	/* (offset, number) */
+	{ 8,  6},
+	{24,  4},
+	{30, 50},
+	{-1, -1}
+};
+
+static const s16 da850_dma1_rsv_chans[][2] = {
+	/* (offset, number) */
+	{ 0, 28},
+	{30,  2},
+	{-1, -1}
+};
+
+static const s16 da850_dma1_rsv_slots[][2] = {
+	/* (offset, number) */
+	{ 0, 28},
+	{30, 90},
+	{-1, -1}
+};
+
+static struct edma_rsv_info da850_edma_cc0_rsv = {
+	.rsv_chans	= da850_dma0_rsv_chans,
+	.rsv_slots	= da850_dma0_rsv_slots,
+};
+
+static struct edma_rsv_info da850_edma_cc1_rsv = {
+	.rsv_chans	= da850_dma1_rsv_chans,
+	.rsv_slots	= da850_dma1_rsv_slots,
+};
+
+static struct edma_rsv_info *da850_edma_rsv[2] = {
+	&da850_edma_cc0_rsv,
+	&da850_edma_cc1_rsv,
+};
 
 static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
 	.enabled_uarts = 0x7,
@@ -80,6 +129,11 @@ static __init void omapl138_hawk_init(void)
 
 	omapl138_hawk_config_emac();
 
+	ret = da850_register_edma(da850_edma_rsv);
+	if (ret)
+		pr_warning("%s: EDMA registration failed: %d\n",
+			__func__, ret);
+
 	ret = da8xx_register_watchdog();
 	if (ret)
 		pr_warning("omapl138_hawk_init: "
-- 
1.6.0.5