linux-kernel - [PATCH v4 1/4] dma: imx-sdma: Add sdma firmware version 2 support

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Message-ID: <4fd9bd97312d255a80d686e911f5e9493db31d54.1383226444.git.b42378@freescale.com>
Date:	Thu, 31 Oct 2013 21:44:13 +0800
From:	Nicolin Chen <b42378@...escale.com>
To:	<timur@...i.org>, <shawn.guo@...aro.org>, <broonie@...nel.org>,
	<s.hauer@...gutronix.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <dmaengine@...r.kernel.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <alsa-devel@...a-project.org>,
	<rob.herring@...xeda.com>, <mark.rutland@....com>,
	<swarren@...dotorg.org>, <pawel.moll@....com>,
	<ijc+devicetree@...lion.org.uk>
Subject: [PATCH v4 1/4] dma: imx-sdma: Add sdma firmware version 2 support

On i.MX5/6 series, SDMA is using new version firmware to support SSI
dual FIFO feature and HDMI Audio (i.MX6Q/DL only). Thus add it.

Signed-off-by: Nicolin Chen <b42378@...escale.com>
---
 drivers/dma/imx-sdma.c                     | 15 ++++++++++++++-
 include/linux/platform_data/dma-imx-sdma.h |  5 +++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index fc43603..c7ece8d 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -323,6 +323,7 @@ struct sdma_engine {
 	struct clk			*clk_ipg;
 	struct clk			*clk_ahb;
 	spinlock_t			channel_0_lock;
+	u32				script_number;
 	struct sdma_script_start_addrs	*script_addrs;
 	const struct sdma_driver_data	*drvdata;
 };
@@ -1238,6 +1239,7 @@ static void sdma_issue_pending(struct dma_chan *chan)
 }
 
 #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1	34
+#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2	38
 
 static void sdma_add_scripts(struct sdma_engine *sdma,
 		const struct sdma_script_start_addrs *addr)
@@ -1246,7 +1248,7 @@ static void sdma_add_scripts(struct sdma_engine *sdma,
 	s32 *saddr_arr = (u32 *)sdma->script_addrs;
 	int i;
 
-	for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++)
+	for (i = 0; i < sdma->script_number; i++)
 		if (addr_arr[i] > 0)
 			saddr_arr[i] = addr_arr[i];
 }
@@ -1272,6 +1274,17 @@ static void sdma_load_firmware(const struct firmware *fw, void *context)
 		goto err_firmware;
 	if (header->ram_code_start + header->ram_code_size > fw->size)
 		goto err_firmware;
+	switch (header->version_major) {
+		case 1:
+			sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1;
+			break;
+		case 2:
+			sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2;
+			break;
+		default:
+			dev_err(sdma->dev, "unknown firmware version\n");
+			return;
+	}
 
 	addr = (void *)header + header->script_addrs_start;
 	ram_code = (void *)header + header->ram_code_start;
diff --git a/include/linux/platform_data/dma-imx-sdma.h b/include/linux/platform_data/dma-imx-sdma.h
index 3a39428..eabac4e 100644
--- a/include/linux/platform_data/dma-imx-sdma.h
+++ b/include/linux/platform_data/dma-imx-sdma.h
@@ -43,6 +43,11 @@ struct sdma_script_start_addrs {
 	s32 dptc_dvfs_addr;
 	s32 utra_addr;
 	s32 ram_code_start_addr;
+	/* End of v1 array */
+	s32 mcu_2_ssish_addr;
+	s32 ssish_2_mcu_addr;
+	s32 hdmi_dma_addr;
+	/* End of v2 array */
 };
 
 /**
-- 
1.8.4


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