dma-s3c2410.c

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/* linux/arch/arm/mach-s3c2410/dma.c
 *
 * Copyright (c) 2006 Simtec Electronics
 *  Ben Dooks <[email protected]>
 *
 * 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/device.h>
#include <linux/serial_core.h>

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

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

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,
    },
    [DMACH_SPI0] = {
        .name       = "spi0",
        .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
    },
    [DMACH_SPI1] = {
        .name       = "spi1",
        .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
    },
    [DMACH_UART0] = {
        .name       = "uart0",
        .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
    },
    [DMACH_UART1] = {
        .name       = "uart1",
        .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
    },
        [DMACH_UART2] = {
        .name       = "uart2",
        .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
    },
    [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,
    },
    [DMACH_I2S_OUT] = {
        .name       = "i2s-sdo",
        .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
    },
    [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 device *dev,
                  struct subsys_interface *sif)
{
    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 subsys_interface s3c2410_dma_interface = {
    .name       = "s3c2410_dma",
    .subsys     = &s3c2410_subsys,
    .add_dev    = s3c2410_dma_add,
};

static int __init s3c2410_dma_drvinit(void)
{
    return subsys_interface_register(&s3c2410_dma_interface);
}

arch_initcall(s3c2410_dma_drvinit);

static struct subsys_interface s3c2410a_dma_interface = {
    .name       = "s3c2410a_dma",
    .subsys     = &s3c2410a_subsys,
    .add_dev    = s3c2410_dma_add,
};

static int __init s3c2410a_dma_drvinit(void)
{
    return subsys_interface_register(&s3c2410a_dma_interface);
}

arch_initcall(s3c2410a_dma_drvinit);
#endif

#if defined(CONFIG_CPU_S3C2442)
/* S3C2442 DMA contains the same selection table as the S3C2410 */
static struct subsys_interface s3c2442_dma_interface = {
    .name       = "s3c2442_dma",
    .subsys     = &s3c2442_subsys,
    .add_dev    = s3c2410_dma_add,
};

static int __init s3c2442_dma_drvinit(void)
{
    return subsys_interface_register(&s3c2442_dma_interface);
}

arch_initcall(s3c2442_dma_drvinit);
#endif