ARM: EXYNOS: Add MFC device tree support

This patch adds device tree entry for MFC v6 in the Exynos5
SoC. Makes the required changes in the clock files and adds
MFC to the DT device list.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
[kgene.kim@samsung.com: fixed section mismatches Seung-Woo Kim reported]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

9 files changed, 98 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/media/s5p-mfc.txt b/Documentation/devicetree/bindings/media/s5p-mfc.txt
new file mode 100644
index 0000000..67ec3d4
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/s5p-mfc.txt
@@ -0,0 +1,23 @@
+* Samsung Multi Format Codec (MFC)
+
+Multi Format Codec (MFC) is the IP present in Samsung SoCs which
+supports high resolution decoding and encoding functionalities.
+The MFC device driver is a v4l2 driver which can encode/decode
+video raw/elementary streams and has support for all popular
+video codecs.
+
+Required properties:
+  - compatible : value should be either one among the following
+	(a) "samsung,mfc-v5" for MFC v5 present in Exynos4 SoCs
+	(b) "samsung,mfc-v6" for MFC v6 present in Exynos5 SoCs
+
+  - reg : Physical base address of the IP registers and length of memory
+	  mapped region.
+
+  - interrupts : MFC interrupt number to the CPU.
+
+  - samsung,mfc-r : Base address of the first memory bank used by MFC
+		    for DMA contiguous memory allocation and its size.
+
+  - samsung,mfc-l : Base address of the second memory bank used by MFC
+		    for DMA contiguous memory allocation and its size.
diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index a352df4..21d4ccd 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -166,4 +166,9 @@
 	spi_2: spi@12d40000 {
 		status = "disabled";
 	};
+
+	codec@11000000 {
+		samsung,mfc-r = <0x43000000 0x800000>;
+		samsung,mfc-l = <0x51000000 0x800000>;
+	};
 };
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index dddfd6e..49546bc 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -62,6 +62,12 @@
 		interrupts = <0 42 0>;
 	};
 
+	codec@11000000 {
+		compatible = "samsung,mfc-v6";
+		reg = <0x11000000 0x10000>;
+		interrupts = <0 96 0>;
+	};
+
 	rtc {
 		compatible = "samsung,s3c6410-rtc";
 		reg = <0x101E0000 0x100>;
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index da55107..bb3b09a 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -63,6 +63,7 @@ config SOC_EXYNOS5250
 	depends on ARCH_EXYNOS5
 	select S5P_PM if PM
 	select S5P_SLEEP if PM
+	select S5P_DEV_MFC
 	select SAMSUNG_DMADEV
 	help
 	  Enable EXYNOS5250 SoC support
diff --git a/arch/arm/mach-exynos/clock-exynos5.c b/arch/arm/mach-exynos/clock-exynos5.c
index c44ca1e..8c4e325 100644
--- a/arch/arm/mach-exynos/clock-exynos5.c
+++ b/arch/arm/mach-exynos/clock-exynos5.c
@@ -664,7 +664,7 @@ static struct clk exynos5_init_clocks_off[] = {
 		.ctrlbit	= (1 << 25),
 	}, {
 		.name		= "mfc",
-		.devname	= "s5p-mfc",
+		.devname	= "s5p-mfc-v6",
 		.enable		= exynos5_clk_ip_mfc_ctrl,
 		.ctrlbit	= (1 << 0),
 	}, {
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index db1cd8e..b7f1154 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -11,6 +11,8 @@
 
 #include <linux/of_platform.h>
 #include <linux/serial_core.h>
+#include <linux/memblock.h>
+#include <linux/of_fdt.h>
 
 #include <asm/mach/arch.h>
 #include <asm/hardware/gic.h>
@@ -18,6 +20,7 @@
 
 #include <plat/cpu.h>
 #include <plat/regs-serial.h>
+#include <plat/mfc.h>
 
 #include "common.h"
 
@@ -72,6 +75,7 @@ static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
 				"exynos-gsc.2", NULL),
 	OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
 				"exynos-gsc.3", NULL),
+	OF_DEV_AUXDATA("samsung,mfc-v6", 0x11000000, "s5p-mfc-v6", NULL),
 	{},
 };
 
@@ -92,6 +96,17 @@ static char const *exynos5250_dt_compat[] __initdata = {
 	NULL
 };
 
+static void __init exynos5_reserve(void)
+{
+	struct s5p_mfc_dt_meminfo mfc_mem;
+
+	/* Reserve memory for MFC only if it's available */
+	mfc_mem.compatible = "samsung,mfc-v6";
+	if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
+		s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
+				mfc_mem.lsize);
+}
+
 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 	/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
 	.init_irq	= exynos5_init_irq,
@@ -103,4 +118,5 @@ DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 	.timer		= &exynos4_timer,
 	.dt_compat	= exynos5250_dt_compat,
 	.restart        = exynos5_restart,
+	.reserve	= exynos5_reserve,
 MACHINE_END
diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
index 03f654d..52dfa8f 100644
--- a/arch/arm/plat-samsung/devs.c
+++ b/arch/arm/plat-samsung/devs.c
@@ -933,6 +933,7 @@ struct platform_device s5p_device_mfc_r = {
 		.coherent_dma_mask	= DMA_BIT_MASK(32),
 	},
 };
+
 #endif /* CONFIG_S5P_DEV_MFC */
 
 /* MIPI CSIS */
diff --git a/arch/arm/plat-samsung/include/plat/mfc.h b/arch/arm/plat-samsung/include/plat/mfc.h
index ac13227..e6d7c42 100644
--- a/arch/arm/plat-samsung/include/plat/mfc.h
+++ b/arch/arm/plat-samsung/include/plat/mfc.h
@@ -10,6 +10,14 @@
 #ifndef __PLAT_SAMSUNG_MFC_H
 #define __PLAT_SAMSUNG_MFC_H __FILE__
 
+struct s5p_mfc_dt_meminfo {
+	unsigned long	loff;
+	unsigned long	lsize;
+	unsigned long	roff;
+	unsigned long	rsize;
+	char		*compatible;
+};
+
 /**
  * s5p_mfc_reserve_mem - function to early reserve memory for MFC driver
  * @rbase:	base address for MFC 'right' memory interface
@@ -24,4 +32,7 @@
 void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
 				phys_addr_t lbase, unsigned int lsize);
 
+int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
+				int depth, void *data);
+
 #endif /* __PLAT_SAMSUNG_MFC_H */
diff --git a/arch/arm/plat-samsung/s5p-dev-mfc.c b/arch/arm/plat-samsung/s5p-dev-mfc.c
index ad60894..5ec104b 100644
--- a/arch/arm/plat-samsung/s5p-dev-mfc.c
+++ b/arch/arm/plat-samsung/s5p-dev-mfc.c
@@ -14,6 +14,8 @@
 #include <linux/dma-mapping.h>
 #include <linux/memblock.h>
 #include <linux/ioport.h>
+#include <linux/of_fdt.h>
+#include <linux/of.h>
 
 #include <mach/map.h>
 #include <plat/devs.h>
@@ -69,3 +71,35 @@ static int __init s5p_mfc_memory_init(void)
 	return 0;
 }
 device_initcall(s5p_mfc_memory_init);
+
+#ifdef CONFIG_OF
+int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
+				int depth, void *data)
+{
+	__be32 *prop;
+	unsigned long len;
+	struct s5p_mfc_dt_meminfo *mfc_mem = data;
+
+	if (!data)
+		return 0;
+
+	if (!of_flat_dt_is_compatible(node, mfc_mem->compatible))
+		return 0;
+
+	prop = of_get_flat_dt_prop(node, "samsung,mfc-l", &len);
+	if (!prop || (len != 2 * sizeof(unsigned long)))
+		return 0;
+
+	mfc_mem->loff = be32_to_cpu(prop[0]);
+	mfc_mem->lsize = be32_to_cpu(prop[1]);
+
+	prop = of_get_flat_dt_prop(node, "samsung,mfc-r", &len);
+	if (!prop || (len != 2 * sizeof(unsigned long)))
+		return 0;
+
+	mfc_mem->roff = be32_to_cpu(prop[0]);
+	mfc_mem->rsize = be32_to_cpu(prop[1]);
+
+	return 1;
+}
+#endif