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dma.c

/* 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/sysdev.h>
#include <linux/serial_core.h>
#include <linux/io.h>

#include <asm/dma.h>
#include <mach/dma.h>

#include <plat/dma.h>
#include <plat/cpu.h>

#include <plat/regs-serial.h>
#include <mach/regs-gpio.h>
#include <asm/plat-s3c/regs-ac97.h>
#include <mach/regs-mem.h>
#include <mach/regs-lcd.h>
#include <mach/regs-sdi.h>
#include <asm/plat-s3c24xx/regs-iis.h>
#include <asm/plat-s3c24xx/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] = {
            .name       = "sdi",
            .channels   = MAP(S3C2443_DMAREQSEL_SDI),
            .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
            .hw_addr.from     = S3C2410_PA_IIS + S3C2410_IISFIFO,
      },
      [DMACH_SPI0] = {
            .name       = "spi0",
            .channels   = MAP(S3C2443_DMAREQSEL_SPI0TX),
            .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
            .hw_addr.from     = S3C2410_PA_SPI + S3C2410_SPRDAT,
      },
      [DMACH_SPI1] = {
            .name       = "spi1",
            .channels   = MAP(S3C2443_DMAREQSEL_SPI1TX),
            .hw_addr.to = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
            .hw_addr.from     = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
      },
      [DMACH_UART0] = {
            .name       = "uart0",
            .channels   = MAP(S3C2443_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(S3C2443_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(S3C2443_DMAREQSEL_UART2_0),
            .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
            .hw_addr.from     = S3C2410_PA_UART2 + S3C2410_URXH,
      },
            [DMACH_UART3] = {
            .name       = "uart3",
            .channels   = MAP(S3C2443_DMAREQSEL_UART3_0),
            .hw_addr.to = S3C2443_PA_UART3 + S3C2410_UTXH,
            .hw_addr.from     = S3C2443_PA_UART3 + S3C2410_URXH,
      },
      [DMACH_UART0_SRC2] = {
            .name       = "uart0",
            .channels   = MAP(S3C2443_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(S3C2443_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(S3C2443_DMAREQSEL_UART2_1),
            .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
            .hw_addr.from     = S3C2410_PA_UART2 + S3C2410_URXH,
      },
            [DMACH_UART3_SRC2] = {
            .name       = "uart3",
            .channels   = MAP(S3C2443_DMAREQSEL_UART3_1),
            .hw_addr.to = S3C2443_PA_UART3 + S3C2410_UTXH,
            .hw_addr.from     = S3C2443_PA_UART3 + S3C2410_URXH,
      },
      [DMACH_TIMER] = {
            .name       = "timer",
            .channels   = MAP(S3C2443_DMAREQSEL_TIMER),
      },
      [DMACH_I2S_IN] = {
            .name       = "i2s-sdi",
            .channels   = MAP(S3C2443_DMAREQSEL_I2SRX),
            .hw_addr.from     = S3C2410_PA_IIS + S3C2410_IISFIFO,
      },
      [DMACH_I2S_OUT] = {
            .name       = "i2s-sdo",
            .channels   = MAP(S3C2443_DMAREQSEL_I2STX),
            .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
      },
      [DMACH_PCM_IN] = {
            .name       = "pcm-in",
            .channels   = MAP(S3C2443_DMAREQSEL_PCMIN),
            .hw_addr.from     = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
      },
      [DMACH_PCM_OUT] = {
            .name       = "pcm-out",
            .channels   = MAP(S3C2443_DMAREQSEL_PCMOUT),
            .hw_addr.to = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
      },
      [DMACH_MIC_IN] = {
            .name       = "mic-in",
            .channels   = MAP(S3C2443_DMAREQSEL_MICIN),
            .hw_addr.from     = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
      },
};

static void s3c2443_dma_select(struct s3c2410_dma_chan *chan,
                         struct s3c24xx_dma_map *map)
{
      writel(map->channels[0] | 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 sys_device *sysdev)
{
      s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100);
      return s3c24xx_dma_init_map(&s3c2443_dma_sel);
}

static struct sysdev_driver s3c2443_dma_driver = {
      .add  = s3c2443_dma_add,
};

static int __init s3c2443_dma_init(void)
{
      return sysdev_driver_register(&s3c2443_sysclass, &s3c2443_dma_driver);
}

arch_initcall(s3c2443_dma_init);

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