text: /* 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 <asm/dma.h>
  #include <asm/arch/dma.h>
  #include <asm/io.h>
  
  #include <asm/plat-s3c24xx/dma.h>
  #include <asm/plat-s3c24xx/cpu.h>
  
  #include <asm/arch/regs-serial.h>
  #include <asm/arch/regs-gpio.h>
  #include <asm/arch/regs-ac97.h>
  #include <asm/arch/regs-mem.h>
  #include <asm/arch/regs-lcd.h>
  #include <asm/arch/regs-sdi.h>
  #include <asm/arch/regs-iis.h>
  #include <asm/arch/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),
  	},
  	[DMACH_XD1] = {
  		.name		= "xdreq1",
  		.channels	= MAP(S3C2412_DMAREQSEL_XDREQ1),
  	},
  	[DMACH_SDI] = {
  		.name		= "sdi",
  		.channels	= MAP(S3C2412_DMAREQSEL_SDI),
  		.hw_addr.to	= S3C2410_PA_IIS + S3C2410_IISFIFO,
  		.hw_addr.from	= S3C2410_PA_IIS + S3C2410_IISFIFO,
  	},
  	[DMACH_SPI0] = {
  		.name		= "spi0",
  		.channels	= MAP(S3C2412_DMAREQSEL_SPI0TX),
  		.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),
  		.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),
  		.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),
  		.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),
  		.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),
  		.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),
  		.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),
  		.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),
  	},
  	[DMACH_I2S_IN] = {
  		.name		= "i2s-sdi",
  		.channels	= MAP(S3C2412_DMAREQSEL_I2SRX),
  		.hw_addr.from	= S3C2410_PA_IIS + S3C2410_IISFIFO,
  	},
  	[DMACH_I2S_OUT] = {
  		.name		= "i2s-sdo",
  		.channels	= MAP(S3C2412_DMAREQSEL_I2STX),
  		.hw_addr.to	= S3C2410_PA_IIS + S3C2410_IISFIFO,
  	},
  	[DMACH_USB_EP1] = {
  		.name		= "usb-ep1",
  		.channels	= MAP(S3C2412_DMAREQSEL_USBEP1),
  	},
  	[DMACH_USB_EP2] = {
  		.name		= "usb-ep2",
  		.channels	= MAP(S3C2412_DMAREQSEL_USBEP2),
  	},
  	[DMACH_USB_EP3] = {
  		.name		= "usb-ep3",
  		.channels	= MAP(S3C2412_DMAREQSEL_USBEP3),
  	},
  	[DMACH_USB_EP4] = {
  		.name		= "usb-ep4",
  		.channels	= MAP(S3C2412_DMAREQSEL_USBEP4),
  	},
  };
  
  static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
  			       struct s3c24xx_dma_map *map)
  {
  	writel(map->channels[0] | S3C2412_DMAREQSEL_HW,
  	       chan->regs + S3C2412_DMA_DMAREQSEL);
  }
  
  static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
  	.select		= s3c2412_dma_select,
  	.dcon_mask	= 0,
  	.map		= s3c2412_dma_mappings,
  	.map_size	= ARRAY_SIZE(s3c2412_dma_mappings),
  };
  
  static int 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);
  