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dma-db5500.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
 * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
 * Author: Rabin Vincent <rabinv.vincent@stericsson.com> for ST-Ericsson
 *
 * License terms: GNU General Public License (GPL), version 2
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>

#include <plat/ste_dma40.h>
#include <mach/setup.h>
#include <mach/hardware.h>

#include "ste-dma40-db5500.h"

static struct resource dma40_resources[] = {
      [0] = {
            .start = U5500_DMA_BASE,
            .end   = U5500_DMA_BASE + SZ_4K - 1,
            .flags = IORESOURCE_MEM,
            .name  = "base",
      },
      [1] = {
            .start = U5500_DMA_LCPA_BASE,
            .end   = U5500_DMA_LCPA_BASE + 2 * SZ_1K - 1,
            .flags = IORESOURCE_MEM,
            .name  = "lcpa",
      },
      [2] = {
            .start = IRQ_DB5500_DMA,
            .end   = IRQ_DB5500_DMA,
            .flags = IORESOURCE_IRQ
      }
};

/* Default configuration for physical memcpy */
static struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
      .mode = STEDMA40_MODE_PHYSICAL,
      .dir = STEDMA40_MEM_TO_MEM,

      .src_info.data_width = STEDMA40_BYTE_WIDTH,
      .src_info.psize = STEDMA40_PSIZE_PHY_1,
      .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,

      .dst_info.data_width = STEDMA40_BYTE_WIDTH,
      .dst_info.psize = STEDMA40_PSIZE_PHY_1,
      .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
};

/* Default configuration for logical memcpy */
static struct stedma40_chan_cfg dma40_memcpy_conf_log = {
      .dir = STEDMA40_MEM_TO_MEM,

      .src_info.data_width = STEDMA40_BYTE_WIDTH,
      .src_info.psize = STEDMA40_PSIZE_LOG_1,
      .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,

      .dst_info.data_width = STEDMA40_BYTE_WIDTH,
      .dst_info.psize = STEDMA40_PSIZE_LOG_1,
      .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
};

/*
 * Mapping between soruce event lines and physical device address This was
 * created assuming that the event line is tied to a device and therefore the
 * address is constant, however this is not true for at least USB, and the
 * values are just placeholders for USB.  This table is preserved and used for
 * now.
 */
static const dma_addr_t dma40_rx_map[DB5500_DMA_NR_DEV] = {
      [DB5500_DMA_DEV24_SDMMC0_RX] = -1,
};

/* Mapping between destination event lines and physical device address */
static const dma_addr_t dma40_tx_map[DB5500_DMA_NR_DEV] = {
      [DB5500_DMA_DEV24_SDMMC0_TX] = -1,
};

static int dma40_memcpy_event[] = {
      DB5500_DMA_MEMCPY_TX_1,
      DB5500_DMA_MEMCPY_TX_2,
      DB5500_DMA_MEMCPY_TX_3,
      DB5500_DMA_MEMCPY_TX_4,
      DB5500_DMA_MEMCPY_TX_5,
};

static struct stedma40_platform_data dma40_plat_data = {
      .dev_len          = ARRAY_SIZE(dma40_rx_map),
      .dev_rx                 = dma40_rx_map,
      .dev_tx                 = dma40_tx_map,
      .memcpy                 = dma40_memcpy_event,
      .memcpy_len       = ARRAY_SIZE(dma40_memcpy_event),
      .memcpy_conf_phy  = &dma40_memcpy_conf_phy,
      .memcpy_conf_log  = &dma40_memcpy_conf_log,
      .disabled_channels      = {-1},
};

static struct platform_device dma40_device = {
      .dev = {
            .platform_data = &dma40_plat_data,
      },
      .name       = "dma40",
      .id         = 0,
      .num_resources    = ARRAY_SIZE(dma40_resources),
      .resource   = dma40_resources
};

void __init db5500_dma_init(void)
{
      int ret;

      ret = platform_device_register(&dma40_device);
      if (ret)
            dev_err(&dma40_device.dev, "unable to register device: %d\n", ret);

}

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