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/* 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/device.h>
#include <linux/serial_core.h>
#include <linux/serial_s3c.h>
#include <linux/io.h>
#include <mach/dma.h>
#include <plat/dma-s3c24xx.h>
#include <plat/cpu.h>
#include <mach/regs-gpio.h>
#include <plat/regs-dma.h>
#include <mach/regs-lcd.h>
#include <plat/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] = { /* only on S3C2443 */
.name = "sdi",
.channels = MAP(S3C2443_DMAREQSEL_SDI),
},
[DMACH_SPI0_RX] = {
.name = "spi0-rx",
.channels = MAP(S3C2443_DMAREQSEL_SPI0RX),
},
[DMACH_SPI0_TX] = {
.name = "spi0-tx",
.channels = MAP(S3C2443_DMAREQSEL_SPI0TX),
},
[DMACH_SPI1_RX] = { /* only on S3C2443/S3C2450 */
.name = "spi1-rx",
.channels = MAP(S3C2443_DMAREQSEL_SPI1RX),
},
[DMACH_SPI1_TX] = { /* only on S3C2443/S3C2450 */
.name = "spi1-tx",
.channels = MAP(S3C2443_DMAREQSEL_SPI1TX),
},
[DMACH_UART0] = {
.name = "uart0",
.channels = MAP(S3C2443_DMAREQSEL_UART0_0),
},
[DMACH_UART1] = {
.name = "uart1",
.channels = MAP(S3C2443_DMAREQSEL_UART1_0),
},
[DMACH_UART2] = {
.name = "uart2",
.channels = MAP(S3C2443_DMAREQSEL_UART2_0),
},
[DMACH_UART3] = {
.name = "uart3",
.channels = MAP(S3C2443_DMAREQSEL_UART3_0),
},
[DMACH_UART0_SRC2] = {
.name = "uart0",
.channels = MAP(S3C2443_DMAREQSEL_UART0_1),
},
[DMACH_UART1_SRC2] = {
.name = "uart1",
.channels = MAP(S3C2443_DMAREQSEL_UART1_1),
},
[DMACH_UART2_SRC2] = {
.name = "uart2",
.channels = MAP(S3C2443_DMAREQSEL_UART2_1),
},
[DMACH_UART3_SRC2] = {
.name = "uart3",
.channels = MAP(S3C2443_DMAREQSEL_UART3_1),
},
[DMACH_TIMER] = {
.name = "timer",
.channels = MAP(S3C2443_DMAREQSEL_TIMER),
},
[DMACH_I2S_IN] = {
.name = "i2s-sdi",
.channels = MAP(S3C2443_DMAREQSEL_I2SRX),
},
[DMACH_I2S_OUT] = {
.name = "i2s-sdo",
.channels = MAP(S3C2443_DMAREQSEL_I2STX),
},
[DMACH_PCM_IN] = {
.name = "pcm-in",
.channels = MAP(S3C2443_DMAREQSEL_PCMIN),
},
[DMACH_PCM_OUT] = {
.name = "pcm-out",
.channels = MAP(S3C2443_DMAREQSEL_PCMOUT),
},
[DMACH_MIC_IN] = {
.name = "mic-in",
.channels = MAP(S3C2443_DMAREQSEL_MICIN),
},
};
static void s3c2443_dma_select(struct s3c2410_dma_chan *chan,
struct s3c24xx_dma_map *map)
{
unsigned long chsel = map->channels[0] & (~DMA_CH_VALID);
writel(chsel | 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 __init s3c2443_dma_add(struct device *dev,
struct subsys_interface *sif)
{
s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100);
return s3c24xx_dma_init_map(&s3c2443_dma_sel);
}
#ifdef CONFIG_CPU_S3C2416
/* S3C2416 DMA contains the same selection table as the S3C2443 */
static struct subsys_interface s3c2416_dma_interface = {
.name = "s3c2416_dma",
.subsys = &s3c2416_subsys,
.add_dev = s3c2443_dma_add,
};
static int __init s3c2416_dma_init(void)
{
return subsys_interface_register(&s3c2416_dma_interface);
}
arch_initcall(s3c2416_dma_init);
#endif
#ifdef CONFIG_CPU_S3C2443
static struct subsys_interface s3c2443_dma_interface = {
.name = "s3c2443_dma",
.subsys = &s3c2443_subsys,
.add_dev = s3c2443_dma_add,
};
static int __init s3c2443_dma_init(void)
{
return subsys_interface_register(&s3c2443_dma_interface);
}
arch_initcall(s3c2443_dma_init);
#endif
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