[ARM] 4221/1: S3C2443: DMA support

Add initialisation and mappings for S3C2443 DMA
system

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

3 files changed, 188 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2443/Kconfig b/arch/arm/mach-s3c2443/Kconfig
index 722bdea3c193..079c1effd3d2 100644
--- a/arch/arm/mach-s3c2443/Kconfig
+++ b/arch/arm/mach-s3c2443/Kconfig
@@ -12,6 +12,12 @@ config CPU_S3C2443
         help
           Support for the S3C2443 SoC from the S3C24XX line
 
+config S3C2443_DMA
+        bool
+        depends on CPU_S3C2443
+        help
+          Internal config node for S3C2443 DMA support
+
 menu "S3C2443 Machines"
 
 config MACH_SMDK2443
diff --git a/arch/arm/mach-s3c2443/Makefile b/arch/arm/mach-s3c2443/Makefile
index a878076beecd..d1843c9eb8bd 100644
--- a/arch/arm/mach-s3c2443/Makefile
+++ b/arch/arm/mach-s3c2443/Makefile
@@ -13,6 +13,8 @@ obj-$(CONFIG_CPU_S3C2443)	+= s3c2443.o
 obj-$(CONFIG_CPU_S3C2443)       += irq.o
 obj-$(CONFIG_CPU_S3C2443)       += clock.o
 
+obj-$(CONFIG_S3C2443_DMA)       += dma.o
+
 # Machine support
 
 obj-$(CONFIG_MACH_SMDK2443)     += mach-smdk2443.o
diff --git a/arch/arm/mach-s3c2443/dma.c b/arch/arm/mach-s3c2443/dma.c
new file mode 100644
index 000000000000..f70e8ccffc3d
--- /dev/null
+++ b/arch/arm/mach-s3c2443/dma.c
@@ -0,0 +1,180 @@
+/* linux/arch/arm/mach-s3c2443/dma.c
+ *
+ * Copyright (c) 2007 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2443 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 <linux/serial_core.h>
+
+#include <asm/dma.h>
+#include <asm/arch/dma.h>
+#include <asm/io.h>
+
+#include <asm/plat-s3c24xx/dma.h>
+#include <asm/plat-s3c24xx/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) { \
+                [0]     = (x) | DMA_CH_VALID,   \
+                [1]     = (x) | DMA_CH_VALID,   \
+                [2]     = (x) | DMA_CH_VALID,   \
+                [3]     = (x) | DMA_CH_VALID,   \
+                [4]     = (x) | DMA_CH_VALID,   \
+                [5]     = (x) | DMA_CH_VALID,   \
+        }
+
+static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
+        [DMACH_XD0] = {
+                .name           = "xdreq0",
+                .channels       = MAP(S3C2443_DMAREQSEL_XDREQ0),
+        },
+        [DMACH_XD1] = {
+                .name           = "xdreq1",
+                .channels       = MAP(S3C2443_DMAREQSEL_XDREQ1),
+        },
+        [DMACH_SDI] = {
+                .name           = "sdi",
+                .channels       = MAP(S3C2443_DMAREQSEL_SDI),
+                .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
+                .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
+        },
+        [DMACH_SPI0] = {
+                .name           = "spi0",
+                .channels       = MAP(S3C2443_DMAREQSEL_SPI0TX),
+                .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
+                .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
+        },
+        [DMACH_SPI1] = {
+                .name           = "spi1",
+                .channels       = MAP(S3C2443_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(S3C2443_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(S3C2443_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(S3C2443_DMAREQSEL_UART2_0),
+                .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
+        },
+        [DMACH_UART3] = {
+                .name           = "uart3",
+                .channels       = MAP(S3C2443_DMAREQSEL_UART3_0),
+                .hw_addr.to     = S3C2443_PA_UART3 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2443_PA_UART3 + S3C2410_URXH,
+        },
+        [DMACH_UART0_SRC2] = {
+                .name           = "uart0",
+                .channels       = MAP(S3C2443_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(S3C2443_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(S3C2443_DMAREQSEL_UART2_1),
+                .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
+        },
+        [DMACH_UART3_SRC2] = {
+                .name           = "uart3",
+                .channels       = MAP(S3C2443_DMAREQSEL_UART3_1),
+                .hw_addr.to     = S3C2443_PA_UART3 + S3C2410_UTXH,
+                .hw_addr.from   = S3C2443_PA_UART3 + S3C2410_URXH,
+        },
+        [DMACH_TIMER] = {
+                .name           = "timer",
+                .channels       = MAP(S3C2443_DMAREQSEL_TIMER),
+        },
+        [DMACH_I2S_IN] = {
+                .name           = "i2s-sdi",
+                .channels       = MAP(S3C2443_DMAREQSEL_I2SRX),
+                .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
+        },
+        [DMACH_I2S_OUT] = {
+                .name           = "i2s-sdo",
+                .channels       = MAP(S3C2443_DMAREQSEL_I2STX),
+                .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
+        },
+        [DMACH_PCM_IN] = {
+                .name           = "pcm-in",
+                .channels       = MAP(S3C2443_DMAREQSEL_PCMIN),
+                .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
+        },
+        [DMACH_PCM_OUT] = {
+                .name           = "pcm-out",
+                .channels       = MAP(S3C2443_DMAREQSEL_PCMOUT),
+                .hw_addr.to     = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
+        },
+        [DMACH_MIC_IN] = {
+                .name           = "mic-in",
+                .channels       = MAP(S3C2443_DMAREQSEL_MICIN),
+                .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
+        },
+};
+
+static void s3c2443_dma_select(struct s3c2410_dma_chan *chan,
+                               struct s3c24xx_dma_map *map)
+{
+        writel(map->channels[0] | S3C2443_DMAREQSEL_HW,
+               chan->regs + S3C2443_DMA_DMAREQSEL);
+}
+
+static struct s3c24xx_dma_selection __initdata s3c2443_dma_sel = {
+        .select         = s3c2443_dma_select,
+        .dcon_mask      = 0,
+        .map            = s3c2443_dma_mappings,
+        .map_size       = ARRAY_SIZE(s3c2443_dma_mappings),
+};
+
+static int s3c2443_dma_add(struct sys_device *sysdev)
+{
+        s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100);
+        return s3c24xx_dma_init_map(&s3c2443_dma_sel);
+}
+
+static struct sysdev_driver s3c2443_dma_driver = {
+        .add    = s3c2443_dma_add,
+};
+
+static int __init s3c2443_dma_init(void)
+{
+        return sysdev_driver_register(&s3c2443_sysclass, &s3c2443_dma_driver);
+}
+
+arch_initcall(s3c2443_dma_init);