[ARM] 3800/2: S3C2412: DMA channel mappings

DMA channel mappings for the S3C2312

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 161 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile
index 23f0909915db..0d87a9de0034 100644
--- a/arch/arm/mach-s3c2410/Makefile
+++ b/arch/arm/mach-s3c2410/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_PM_SIMTEC)		+= pm-simtec.o
 obj-$(CONFIG_CPU_S3C2412)	+= s3c2412.o
 obj-$(CONFIG_CPU_S3C2412)	+= s3c2412-irq.o
 obj-$(CONFIG_CPU_S3C2412)	+= s3c2412-clock.o
+obj-dma-$(CONFIG_CPU_S3C2412)	+= s3c2412-dma.o
 
 #
 # S3C244X support
diff --git a/arch/arm/mach-s3c2410/s3c2412-dma.c b/arch/arm/mach-s3c2410/s3c2412-dma.c
new file mode 100644
index 000000000000..171f3706d36d
--- /dev/null
+++ b/arch/arm/mach-s3c2410/s3c2412-dma.c
@@ -0,0 +1,160 @@
+/* linux/arch/arm/mach-s3c2410/s3c2412-dma.c
+ *
+ * (c) 2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2412 DMA selection
+ *
+ * http://armlinux.simtec.co.uk/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sysdev.h>
+
+#include <asm/dma.h>
+#include <asm/arch/dma.h>
+#include <asm/io.h>
+
+#include "dma.h"
+#include "cpu.h"
+
+#include <asm/arch/regs-serial.h>
+#include <asm/arch/regs-gpio.h>
+#include <asm/arch/regs-ac97.h>
+#include <asm/arch/regs-mem.h>
+#include <asm/arch/regs-lcd.h>
+#include <asm/arch/regs-sdi.h>
+#include <asm/arch/regs-iis.h>
+#include <asm/arch/regs-spi.h>
+
+#define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
+
+static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
+	[DMACH_XD0] = {
+		.name		= "xdreq0",
+		.channels	= MAP(S3C2412_DMAREQSEL_XDREQ0),
+	},
+	[DMACH_XD1] = {
+		.name		= "xdreq1",
+		.channels	= MAP(S3C2412_DMAREQSEL_XDREQ1),
+	},
+	[DMACH_SDI] = {
+		.name		= "sdi",
+		.channels	= MAP(S3C2412_DMAREQSEL_SDI),
+		.hw_addr.to	= S3C2410_PA_IIS + S3C2410_IISFIFO,
+		.hw_addr.from	= S3C2410_PA_IIS + S3C2410_IISFIFO,
+	},
+	[DMACH_SPI0] = {
+		.name		= "spi0",
+		.channels	= MAP(S3C2412_DMAREQSEL_SPI0TX),
+		.hw_addr.to	= S3C2410_PA_SPI + S3C2410_SPTDAT,
+		.hw_addr.from	= S3C2410_PA_SPI + S3C2410_SPRDAT,
+	},
+	[DMACH_SPI1] = {
+		.name		= "spi1",
+		.channels	= MAP(S3C2412_DMAREQSEL_SPI1TX),
+		.hw_addr.to	= S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
+		.hw_addr.from	= S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
+	},
+	[DMACH_UART0] = {
+		.name		= "uart0",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART0_0),
+		.hw_addr.to	= S3C2410_PA_UART0 + S3C2410_UTXH,
+		.hw_addr.from	= S3C2410_PA_UART0 + S3C2410_URXH,
+	},
+	[DMACH_UART1] = {
+		.name		= "uart1",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART1_0),
+		.hw_addr.to	= S3C2410_PA_UART1 + S3C2410_UTXH,
+		.hw_addr.from	= S3C2410_PA_UART1 + S3C2410_URXH,
+	},
+      	[DMACH_UART2] = {
+		.name		= "uart2",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART2_0),
+		.hw_addr.to	= S3C2410_PA_UART2 + S3C2410_UTXH,
+		.hw_addr.from	= S3C2410_PA_UART2 + S3C2410_URXH,
+	},
+	[DMACH_UART0_SRC2] = {
+		.name		= "uart0",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART0_1),
+		.hw_addr.to	= S3C2410_PA_UART0 + S3C2410_UTXH,
+		.hw_addr.from	= S3C2410_PA_UART0 + S3C2410_URXH,
+	},
+	[DMACH_UART1_SRC2] = {
+		.name		= "uart1",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART1_1),
+		.hw_addr.to	= S3C2410_PA_UART1 + S3C2410_UTXH,
+		.hw_addr.from	= S3C2410_PA_UART1 + S3C2410_URXH,
+	},
+      	[DMACH_UART2_SRC2] = {
+		.name		= "uart2",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART2_1),
+		.hw_addr.to	= S3C2410_PA_UART2 + S3C2410_UTXH,
+		.hw_addr.from	= S3C2410_PA_UART2 + S3C2410_URXH,
+	},
+	[DMACH_TIMER] = {
+		.name		= "timer",
+		.channels	= MAP(S3C2412_DMAREQSEL_TIMER),
+	},
+	[DMACH_I2S_IN] = {
+		.name		= "i2s-sdi",
+		.channels	= MAP(S3C2412_DMAREQSEL_I2SRX),
+		.hw_addr.from	= S3C2410_PA_IIS + S3C2410_IISFIFO,
+	},
+	[DMACH_I2S_OUT] = {
+		.name		= "i2s-sdo",
+		.channels	= MAP(S3C2412_DMAREQSEL_I2STX),
+		.hw_addr.to	= S3C2410_PA_IIS + S3C2410_IISFIFO,
+	},
+	[DMACH_USB_EP1] = {
+		.name		= "usb-ep1",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP1),
+	},
+	[DMACH_USB_EP2] = {
+		.name		= "usb-ep2",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP2),
+	},
+	[DMACH_USB_EP3] = {
+		.name		= "usb-ep3",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP3),
+	},
+	[DMACH_USB_EP4] = {
+		.name		= "usb-ep4",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP4),
+	},
+};
+
+static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
+			       struct s3c24xx_dma_map *map)
+{
+	writel(chan->regs + S3C2412_DMA_DMAREQSEL,
+	       map->channels[0] | S3C2412_DMAREQSEL_HW);
+}
+
+static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
+	.select		= s3c2412_dma_select,
+	.dcon_mask	= 0,
+	.map		= s3c2412_dma_mappings,
+	.map_size	= ARRAY_SIZE(s3c2412_dma_mappings),
+};
+
+static int s3c2412_dma_add(struct sys_device *sysdev)
+{
+	return s3c24xx_dma_init_map(&s3c2412_dma_sel);
+}
+
+static struct sysdev_driver s3c2412_dma_driver = {
+	.add	= s3c2412_dma_add,
+};
+
+static int __init s3c2412_dma_init(void)
+{
+	return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
+}
+
+arch_initcall(s3c2412_dma_init);