mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 18:41:23 +00:00
198 lines
5.5 KiB
C
198 lines
5.5 KiB
C
/* 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/sysdev.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/dma.h>
|
|
|
|
#include <plat/dma.h>
|
|
#include <plat/cpu.h>
|
|
|
|
#include <plat/regs-serial.h>
|
|
#include <mach/regs-gpio.h>
|
|
#include <plat/regs-ac97.h>
|
|
#include <mach/regs-mem.h>
|
|
#include <mach/regs-lcd.h>
|
|
#include <mach/regs-sdi.h>
|
|
#include <asm/plat-s3c24xx/regs-s3c2412-iis.h>
|
|
#include <asm/plat-s3c24xx/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),
|
|
.hw_addr.to = S3C2410_PA_SDI + S3C2410_SDIDATA,
|
|
.hw_addr.from = S3C2410_PA_SDI + S3C2410_SDIDATA,
|
|
},
|
|
[DMACH_SPI0] = {
|
|
.name = "spi0",
|
|
.channels = MAP(S3C2412_DMAREQSEL_SPI0TX),
|
|
.channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX),
|
|
.hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
|
|
.hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT,
|
|
},
|
|
[DMACH_SPI1] = {
|
|
.name = "spi1",
|
|
.channels = MAP(S3C2412_DMAREQSEL_SPI1TX),
|
|
.channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX),
|
|
.hw_addr.to = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT,
|
|
.hw_addr.from = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPRDAT,
|
|
},
|
|
[DMACH_UART0] = {
|
|
.name = "uart0",
|
|
.channels = MAP(S3C2412_DMAREQSEL_UART0_0),
|
|
.channels_rx = MAP(S3C2412_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(S3C2412_DMAREQSEL_UART1_0),
|
|
.channels_rx = MAP(S3C2412_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(S3C2412_DMAREQSEL_UART2_0),
|
|
.channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0),
|
|
.hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
|
|
.hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
|
|
},
|
|
[DMACH_UART0_SRC2] = {
|
|
.name = "uart0",
|
|
.channels = MAP(S3C2412_DMAREQSEL_UART0_1),
|
|
.channels_rx = MAP(S3C2412_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(S3C2412_DMAREQSEL_UART1_1),
|
|
.channels_rx = MAP(S3C2412_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(S3C2412_DMAREQSEL_UART2_1),
|
|
.channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1),
|
|
.hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
|
|
.hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
|
|
},
|
|
[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),
|
|
.hw_addr.from = S3C2410_PA_IIS + S3C2412_IISRXD,
|
|
},
|
|
[DMACH_I2S_OUT] = {
|
|
.name = "i2s-sdo",
|
|
.channels = MAP(S3C2412_DMAREQSEL_I2STX),
|
|
.channels_rx = MAP(S3C2412_DMAREQSEL_I2STX),
|
|
.hw_addr.to = S3C2410_PA_IIS + S3C2412_IISTXD,
|
|
},
|
|
[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 s3c2410_dmasrc dir)
|
|
{
|
|
unsigned long chsel;
|
|
|
|
if (dir == S3C2410_DMASRC_HW)
|
|
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 sys_device *sysdev)
|
|
{
|
|
s3c2410_dma_init();
|
|
return s3c24xx_dma_init_map(&s3c2412_dma_sel);
|
|
}
|
|
|
|
static struct sysdev_driver s3c2412_dma_driver = {
|
|
.add = s3c2412_dma_add,
|
|
};
|
|
|
|
static int __init s3c2412_dma_init(void)
|
|
{
|
|
return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
|
|
}
|
|
|
|
arch_initcall(s3c2412_dma_init);
|