[ARM] 3797/1: S3C2410: DMA channel mappings

DMA channel mappings for the S3C2410

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

2 files changed, 144 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile
index e4c32f6ffb71..efedeb82c8c4 100644
--- a/arch/arm/mach-s3c2410/Makefile
+++ b/arch/arm/mach-s3c2410/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_CPU_S3C2400)	+= s3c2400-gpio.o
 
 obj-$(CONFIG_CPU_S3C2410)       += s3c2410.o
 obj-$(CONFIG_CPU_S3C2410)       += s3c2410-gpio.o
+obj-dma-$(CONFIG_CPU_S3C2410)   += s3c2410-dma.o
 
 # Power Management support
 
diff --git a/arch/arm/mach-s3c2410/s3c2410-dma.c b/arch/arm/mach-s3c2410/s3c2410-dma.c
new file mode 100644
index 000000000000..91bc169fc25e
--- /dev/null
+++ b/arch/arm/mach-s3c2410/s3c2410-dma.c
@@ -0,0 +1,143 @@
+/* linux/arch/arm/mach-s3c2410/s3c2410-dma.c
+ *
+ * (c) 2006 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 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 "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>
+
+static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
+        [DMACH_XD0] = {
+                .name           = "xdreq0",
+                .channels[0]    = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
+        },
+        [DMACH_XD1] = {
+                .name           = "xdreq1",
+                .channels[1]    = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
+        },
+        [DMACH_SDI] = {
+                .name           = "sdi",
+                .channels[0]    = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
+                .channels[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
+                .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
+                .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
+        },
+        [DMACH_SPI0] = {
+                .name           = "spi0",
+                .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
+                .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
+        },
+        [DMACH_SPI1] = {
+                .name           = "spi1",
+                .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
+                .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
+        },
+        [DMACH_UART0] = {
+                .name           = "uart0",
+                .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
+        },
+        [DMACH_UART1] = {
+                .name           = "uart1",
+                .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
+        },
+        [DMACH_UART2] = {
+                .name           = "uart2",
+                .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
+        },
+        [DMACH_TIMER] = {
+                .name           = "timer",
+                .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
+                .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
+                .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
+        },
+        [DMACH_I2S_IN] = {
+                .name           = "i2s-sdi",
+                .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
+                .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
+                .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
+        },
+        [DMACH_I2S_OUT] = {
+                .name           = "i2s-sdo",
+                .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
+                .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
+        },
+        [DMACH_USB_EP1] = {
+                .name           = "usb-ep1",
+                .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
+        },
+        [DMACH_USB_EP2] = {
+                .name           = "usb-ep2",
+                .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
+        },
+        [DMACH_USB_EP3] = {
+                .name           = "usb-ep3",
+                .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
+        },
+        [DMACH_USB_EP4] = {
+                .name           = "usb-ep4",
+                .channels[3]    =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
+        },
+};
+
+static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
+                               struct s3c24xx_dma_map *map)
+{
+        chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
+}
+
+static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
+        .select         = s3c2410_dma_select,
+        .dcon_mask      = 7 << 24,
+        .map            = s3c2410_dma_mappings,
+        .map_size       = ARRAY_SIZE(s3c2410_dma_mappings),
+};
+
+static int s3c2410_dma_add(struct sys_device *sysdev)
+{
+        return s3c24xx_dma_init_map(&s3c2410_dma_sel);
+}
+
+static struct sysdev_driver s3c2410_dma_driver = {
+        .add    = s3c2410_dma_add,
+};
+
+static int __init s3c2410_dma_init(void)
+{
+        return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_dma_driver);
+}
+
+arch_initcall(s3c2410_dma_init);