linux/arch/arm/mach-s3c24xx/dma-s3c2412.c
Olof Johansson d60d506e6b Merge branch 'next/cleanup-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup
* 'next/cleanup-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (24 commits)
  ARM: S3C24XX: remove call to s3c24xx_setup_clocks
  ARM: S3C24XX: add get_rate for clk_p on S3C2416/2443
  ARM: S3C24XX: add get_rate for clk_h on S3C2416/2443
  ARM: S3C24XX: remove XXX_setup_clocks method from S3C2443
  ARM: S3C24XX: remove obsolete S3C2416_DMA option
  ARM: S3C24XX: Reuse S3C2443 dma for S3C2416
  ARM: S3C24XX: Fix indentation of dma-s3c2443
  ARM: S3C24XX: Move device setup files to mach directory
  ARM: S3C24XX: Consolidate Simtec extensions
  ARM: S3C24XX: move simtec-specific code to mach directory
  ARM: S3C24XX: Move common-smdk code to mach directory
  ARM: S3C24XX: Move s3c2443-clock.c to mach-s3c24xx
  ARM: s3c2410_defconfig: update s3c2410_defconfig
  ARM: S3C2443: move mach-s3c2443/* into mach-s3c24xx/
  ARM: S3C2440: move mach-s3c2440/* into mach-s3c24xx/
  ARM: S3C2416: move mach-s3c2416/* into mach-s3c24xx/
  ARM: S3C2412: move mach-s3c2412/* into mach-s3c24xx/
  ARM: S3C2410: move mach-s3c2410/* into mach-s3c24xx/
  ARM: S3C24XX: change the ARCH_S3C2410 to ARCH_S3C24XX
  ARM: S3C2410: move s3c2410_baseclk_add to clock.h
  ...
2012-03-08 08:53:14 -08:00

181 lines
4.6 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/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,
struct subsys_interface *sif)
{
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);