1 files changed, 179 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/dma-s3c2412.c b/arch/arm/mach-s3c24xx/dma-s3c2412.c
new file mode 100644
index 000000000000..142acd3b5e15
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/dma-s3c2412.c
@@ -0,0 +1,179 @@
+/* linux/arch/arm/mach-s3c2412/dma.c
+ *
+ * Copyright (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/device.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <mach/dma.h>
+
+#include <plat/dma-s3c24xx.h>
+#include <plat/cpu.h>
+
+#include <plat/regs-serial.h>
+#include <mach/regs-gpio.h>
+#include <plat/regs-ac97.h>
+#include <plat/regs-dma.h>
+#include <mach/regs-mem.h>
+#include <mach/regs-lcd.h>
+#include <mach/regs-sdi.h>
+#include <plat/regs-iis.h>
+#include <plat/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),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_XDREQ0),
+	},
+	[DMACH_XD1] = {
+		.name		= "xdreq1",
+		.channels	= MAP(S3C2412_DMAREQSEL_XDREQ1),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_XDREQ1),
+	},
+	[DMACH_SDI] = {
+		.name		= "sdi",
+		.channels	= MAP(S3C2412_DMAREQSEL_SDI),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_SDI),
+	},
+	[DMACH_SPI0] = {
+		.name		= "spi0",
+		.channels	= MAP(S3C2412_DMAREQSEL_SPI0TX),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_SPI0RX),
+	},
+	[DMACH_SPI1] = {
+		.name		= "spi1",
+		.channels	= MAP(S3C2412_DMAREQSEL_SPI1TX),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_SPI1RX),
+	},
+	[DMACH_UART0] = {
+		.name		= "uart0",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART0_0),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_UART0_0),
+	},
+	[DMACH_UART1] = {
+		.name		= "uart1",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART1_0),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_UART1_0),
+	},
+      	[DMACH_UART2] = {
+		.name		= "uart2",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART2_0),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_UART2_0),
+	},
+	[DMACH_UART0_SRC2] = {
+		.name		= "uart0",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART0_1),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_UART0_1),
+	},
+	[DMACH_UART1_SRC2] = {
+		.name		= "uart1",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART1_1),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_UART1_1),
+	},
+      	[DMACH_UART2_SRC2] = {
+		.name		= "uart2",
+		.channels	= MAP(S3C2412_DMAREQSEL_UART2_1),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_UART2_1),
+	},
+	[DMACH_TIMER] = {
+		.name		= "timer",
+		.channels	= MAP(S3C2412_DMAREQSEL_TIMER),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_TIMER),
+	},
+	[DMACH_I2S_IN] = {
+		.name		= "i2s-sdi",
+		.channels	= MAP(S3C2412_DMAREQSEL_I2SRX),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_I2SRX),
+	},
+	[DMACH_I2S_OUT] = {
+		.name		= "i2s-sdo",
+		.channels	= MAP(S3C2412_DMAREQSEL_I2STX),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_I2STX),
+	},
+	[DMACH_USB_EP1] = {
+		.name		= "usb-ep1",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP1),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_USBEP1),
+	},
+	[DMACH_USB_EP2] = {
+		.name		= "usb-ep2",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP2),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_USBEP2),
+	},
+	[DMACH_USB_EP3] = {
+		.name		= "usb-ep3",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP3),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_USBEP3),
+	},
+	[DMACH_USB_EP4] = {
+		.name		= "usb-ep4",
+		.channels	= MAP(S3C2412_DMAREQSEL_USBEP4),
+		.channels_rx	= MAP(S3C2412_DMAREQSEL_USBEP4),
+	},
+};
+
+static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan,
+				  struct s3c24xx_dma_map *map,
+				  enum dma_data_direction dir)
+{
+	unsigned long chsel;
+
+	if (dir == DMA_FROM_DEVICE)
+		chsel = map->channels_rx[0];
+	else
+		chsel = map->channels[0];
+
+	chsel &= ~DMA_CH_VALID;
+	chsel |= S3C2412_DMAREQSEL_HW;
+
+	writel(chsel, chan->regs + S3C2412_DMA_DMAREQSEL);
+}
+
+static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
+			       struct s3c24xx_dma_map *map)
+{
+	s3c2412_dma_direction(chan, map, chan->source);
+}
+
+static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
+	.select		= s3c2412_dma_select,
+	.direction	= s3c2412_dma_direction,
+	.dcon_mask	= 0,
+	.map		= s3c2412_dma_mappings,
+	.map_size	= ARRAY_SIZE(s3c2412_dma_mappings),
+};
+
+static int __init s3c2412_dma_add(struct device *dev)
+{
+	s3c2410_dma_init();
+	return s3c24xx_dma_init_map(&s3c2412_dma_sel);
+}
+
+static struct subsys_interface s3c2412_dma_interface = {
+	.name		= "s3c2412_dma",
+	.subsys		= &s3c2412_subsys,
+	.add_dev	= s3c2412_dma_add,
+};
+
+static int __init s3c2412_dma_init(void)
+{
+	return subsys_interface_register(&s3c2412_dma_interface);
+}
+
+arch_initcall(s3c2412_dma_init);