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dma.c

/* linux/arch/arm/mach-s3c2410/dma.c
 *
 * Copyright (c) 2006 Simtec Electronics
 *    Ben Dooks <ben@simtec.co.uk>
 *
 * S3C2410 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 <mach/dma.h>

#include <asm/plat-s3c24xx/cpu.h>
#include <asm/plat-s3c24xx/dma.h>

#include <asm/plat-s3c/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>

static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
      [DMACH_XD0] = {
            .name       = "xdreq0",
            .channels[0]      = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
      },
      [DMACH_XD1] = {
            .name       = "xdreq1",
            .channels[1]      = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
      },
      [DMACH_SDI] = {
            .name       = "sdi",
            .channels[0]      = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
            .channels[2]      = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
            .channels[3]      = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
            .hw_addr.from     = S3C2410_PA_IIS + S3C2410_IISFIFO,
      },
      [DMACH_SPI0] = {
            .name       = "spi0",
            .channels[1]      = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
            .hw_addr.from     = S3C2410_PA_SPI + S3C2410_SPRDAT,
      },
      [DMACH_SPI1] = {
            .name       = "spi1",
            .channels[3]      = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
            .hw_addr.from     = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
      },
      [DMACH_UART0] = {
            .name       = "uart0",
            .channels[0]      = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
            .hw_addr.from     = S3C2410_PA_UART0 + S3C2410_URXH,
      },
      [DMACH_UART1] = {
            .name       = "uart1",
            .channels[1]      = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
            .hw_addr.from     = S3C2410_PA_UART1 + S3C2410_URXH,
      },
            [DMACH_UART2] = {
            .name       = "uart2",
            .channels[3]      = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
            .hw_addr.from     = S3C2410_PA_UART2 + S3C2410_URXH,
      },
      [DMACH_TIMER] = {
            .name       = "timer",
            .channels[0]      = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
            .channels[2]      = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
            .channels[3]      = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
      },
      [DMACH_I2S_IN] = {
            .name       = "i2s-sdi",
            .channels[1]      = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
            .channels[2]      = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
            .hw_addr.from     = S3C2410_PA_IIS + S3C2410_IISFIFO,
      },
      [DMACH_I2S_OUT] = {
            .name       = "i2s-sdo",
            .channels[2]      = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
            .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
      },
      [DMACH_USB_EP1] = {
            .name       = "usb-ep1",
            .channels[0]      = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
      },
      [DMACH_USB_EP2] = {
            .name       = "usb-ep2",
            .channels[1]      = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
      },
      [DMACH_USB_EP3] = {
            .name       = "usb-ep3",
            .channels[2]      = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
      },
      [DMACH_USB_EP4] = {
            .name       = "usb-ep4",
            .channels[3]      =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
      },
};

static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
                         struct s3c24xx_dma_map *map)
{
      chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
}

static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
      .select           = s3c2410_dma_select,
      .dcon_mask  = 7 << 24,
      .map        = s3c2410_dma_mappings,
      .map_size   = ARRAY_SIZE(s3c2410_dma_mappings),
};

static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
      .channels   = {
            [DMACH_SDI] = {
                  .list = {
                        [0]   = 3 | DMA_CH_VALID,
                        [1]   = 2 | DMA_CH_VALID,
                        [2]   = 0 | DMA_CH_VALID,
                  },
            },
            [DMACH_I2S_IN]    = {
                  .list = {
                        [0]   = 1 | DMA_CH_VALID,
                        [1]   = 2 | DMA_CH_VALID,
                  },
            },
      },
};

static int __init s3c2410_dma_add(struct sys_device *sysdev)
{
      s3c2410_dma_init();
      s3c24xx_dma_order_set(&s3c2410_dma_order);
      return s3c24xx_dma_init_map(&s3c2410_dma_sel);
}

#if defined(CONFIG_CPU_S3C2410)
static struct sysdev_driver s3c2410_dma_driver = {
      .add  = s3c2410_dma_add,
};

static int __init s3c2410_dma_drvinit(void)
{
      return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_dma_driver);
}

arch_initcall(s3c2410_dma_drvinit);
#endif

#if defined(CONFIG_CPU_S3C2442)
/* S3C2442 DMA contains the same selection table as the S3C2410 */
static struct sysdev_driver s3c2442_dma_driver = {
      .add  = s3c2410_dma_add,
};

static int __init s3c2442_dma_drvinit(void)
{
      return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_dma_driver);
}

arch_initcall(s3c2442_dma_drvinit);
#endif


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