1 /* linux/arch/arm/mach-s3c2412/dma.c
3 * Copyright (c) 2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * S3C2412 DMA selection
8 * http://armlinux.simtec.co.uk/
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/device.h>
18 #include <linux/serial_core.h>
19 #include <linux/serial_s3c.h>
24 #include <plat/dma-s3c24xx.h>
27 #include <mach/regs-gpio.h>
28 #include <plat/regs-dma.h>
29 #include <mach/regs-lcd.h>
30 #include <plat/regs-spi.h>
32 #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
34 static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
37 .channels = MAP(S3C2412_DMAREQSEL_XDREQ0),
41 .channels = MAP(S3C2412_DMAREQSEL_XDREQ1),
45 .channels = MAP(S3C2412_DMAREQSEL_SDI),
49 .channels = MAP(S3C2412_DMAREQSEL_SPI0RX),
53 .channels = MAP(S3C2412_DMAREQSEL_SPI0TX),
57 .channels = MAP(S3C2412_DMAREQSEL_SPI1RX),
61 .channels = MAP(S3C2412_DMAREQSEL_SPI1TX),
65 .channels = MAP(S3C2412_DMAREQSEL_UART0_0),
69 .channels = MAP(S3C2412_DMAREQSEL_UART1_0),
73 .channels = MAP(S3C2412_DMAREQSEL_UART2_0),
75 [DMACH_UART0_SRC2] = {
77 .channels = MAP(S3C2412_DMAREQSEL_UART0_1),
79 [DMACH_UART1_SRC2] = {
81 .channels = MAP(S3C2412_DMAREQSEL_UART1_1),
83 [DMACH_UART2_SRC2] = {
85 .channels = MAP(S3C2412_DMAREQSEL_UART2_1),
89 .channels = MAP(S3C2412_DMAREQSEL_TIMER),
93 .channels = MAP(S3C2412_DMAREQSEL_I2SRX),
97 .channels = MAP(S3C2412_DMAREQSEL_I2STX),
101 .channels = MAP(S3C2412_DMAREQSEL_USBEP1),
105 .channels = MAP(S3C2412_DMAREQSEL_USBEP2),
109 .channels = MAP(S3C2412_DMAREQSEL_USBEP3),
113 .channels = MAP(S3C2412_DMAREQSEL_USBEP4),
117 static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
118 struct s3c24xx_dma_map *map)
120 unsigned long chsel = map->channels[0] & (~DMA_CH_VALID);
121 writel(chsel | S3C2412_DMAREQSEL_HW,
122 chan->regs + S3C2412_DMA_DMAREQSEL);
125 static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
126 .select = s3c2412_dma_select,
128 .map = s3c2412_dma_mappings,
129 .map_size = ARRAY_SIZE(s3c2412_dma_mappings),
132 static int __init s3c2412_dma_add(struct device *dev,
133 struct subsys_interface *sif)
136 return s3c24xx_dma_init_map(&s3c2412_dma_sel);
139 static struct subsys_interface s3c2412_dma_interface = {
140 .name = "s3c2412_dma",
141 .subsys = &s3c2412_subsys,
142 .add_dev = s3c2412_dma_add,
145 static int __init s3c2412_dma_init(void)
147 return subsys_interface_register(&s3c2412_dma_interface);
150 arch_initcall(s3c2412_dma_init);