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devices.c

/*
 * mach-davinci/devices.c
 *
 * DaVinci platform device setup/initialization
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>

#include <asm/mach/map.h>

#include <mach/hardware.h>
#include <mach/i2c.h>
#include <mach/irqs.h>
#include <mach/cputype.h>
#include <mach/mux.h>
#include <mach/edma.h>
#include <mach/mmc.h>
#include <mach/time.h>

#define DAVINCI_I2C_BASE           0x01C21000
#define DAVINCI_MMCSD0_BASE        0x01E10000
#define DM355_MMCSD0_BASE          0x01E11000
#define DM355_MMCSD1_BASE          0x01E00000
#define DM365_MMCSD0_BASE          0x01D11000
#define DM365_MMCSD1_BASE          0x01D00000

static struct resource i2c_resources[] = {
      {
            .start            = DAVINCI_I2C_BASE,
            .end        = DAVINCI_I2C_BASE + 0x40,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = IRQ_I2C,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device davinci_i2c_device = {
      .name           = "i2c_davinci",
      .id             = 1,
      .num_resources    = ARRAY_SIZE(i2c_resources),
      .resource   = i2c_resources,
};

void __init davinci_init_i2c(struct davinci_i2c_platform_data *pdata)
{
      if (cpu_is_davinci_dm644x())
            davinci_cfg_reg(DM644X_I2C);

      davinci_i2c_device.dev.platform_data = pdata;
      (void) platform_device_register(&davinci_i2c_device);
}

#if   defined(CONFIG_MMC_DAVINCI) || defined(CONFIG_MMC_DAVINCI_MODULE)

static u64 mmcsd0_dma_mask = DMA_BIT_MASK(32);

static struct resource mmcsd0_resources[] = {
      {
            /* different on dm355 */
            .start = DAVINCI_MMCSD0_BASE,
            .end   = DAVINCI_MMCSD0_BASE + SZ_4K - 1,
            .flags = IORESOURCE_MEM,
      },
      /* IRQs:  MMC/SD, then SDIO */
      {
            .start = IRQ_MMCINT,
            .flags = IORESOURCE_IRQ,
      }, {
            /* different on dm355 */
            .start = IRQ_SDIOINT,
            .flags = IORESOURCE_IRQ,
      },
      /* DMA channels: RX, then TX */
      {
            .start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCRXEVT),
            .flags = IORESOURCE_DMA,
      }, {
            .start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCTXEVT),
            .flags = IORESOURCE_DMA,
      },
};

static struct platform_device davinci_mmcsd0_device = {
      .name = "davinci_mmc",
      .id = 0,
      .dev = {
            .dma_mask = &mmcsd0_dma_mask,
            .coherent_dma_mask = DMA_BIT_MASK(32),
      },
      .num_resources = ARRAY_SIZE(mmcsd0_resources),
      .resource = mmcsd0_resources,
};

static u64 mmcsd1_dma_mask = DMA_BIT_MASK(32);

static struct resource mmcsd1_resources[] = {
      {
            .start = DM355_MMCSD1_BASE,
            .end   = DM355_MMCSD1_BASE + SZ_4K - 1,
            .flags = IORESOURCE_MEM,
      },
      /* IRQs:  MMC/SD, then SDIO */
      {
            .start = IRQ_DM355_MMCINT1,
            .flags = IORESOURCE_IRQ,
      }, {
            .start = IRQ_DM355_SDIOINT1,
            .flags = IORESOURCE_IRQ,
      },
      /* DMA channels: RX, then TX */
      {
            .start = EDMA_CTLR_CHAN(0, 30),     /* rx */
            .flags = IORESOURCE_DMA,
      }, {
            .start = EDMA_CTLR_CHAN(0, 31),     /* tx */
            .flags = IORESOURCE_DMA,
      },
};

static struct platform_device davinci_mmcsd1_device = {
      .name = "davinci_mmc",
      .id = 1,
      .dev = {
            .dma_mask = &mmcsd1_dma_mask,
            .coherent_dma_mask = DMA_BIT_MASK(32),
      },
      .num_resources = ARRAY_SIZE(mmcsd1_resources),
      .resource = mmcsd1_resources,
};


void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
{
      struct platform_device  *pdev = NULL;

      if (WARN_ON(cpu_is_davinci_dm646x()))
            return;

      /* REVISIT: update PINMUX, ARM_IRQMUX, and EDMA_EVTMUX here too;
       * for example if MMCSD1 is used for SDIO, maybe DAT2 is unused.
       *
       * FIXME dm6441 (no MMC/SD), dm357 (one), and dm335 (two) are
       * not handled right here ...
       */
      switch (module) {
      case 1:
            if (cpu_is_davinci_dm355()) {
                  /* REVISIT we may not need all these pins if e.g. this
                   * is a hard-wired SDIO device...
                   */
                  davinci_cfg_reg(DM355_SD1_CMD);
                  davinci_cfg_reg(DM355_SD1_CLK);
                  davinci_cfg_reg(DM355_SD1_DATA0);
                  davinci_cfg_reg(DM355_SD1_DATA1);
                  davinci_cfg_reg(DM355_SD1_DATA2);
                  davinci_cfg_reg(DM355_SD1_DATA3);
            } else if (cpu_is_davinci_dm365()) {
                  void __iomem *pupdctl1 =
                        IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE + 0x7c);

                  /* Configure pull down control */
                  __raw_writel((__raw_readl(pupdctl1) & ~0x400),
                              pupdctl1);

                  mmcsd1_resources[0].start = DM365_MMCSD1_BASE;
                  mmcsd1_resources[0].end = DM365_MMCSD1_BASE +
                                          SZ_4K - 1;
                  mmcsd0_resources[2].start = IRQ_DM365_SDIOINT1;
            } else
                  break;

            pdev = &davinci_mmcsd1_device;
            break;
      case 0:
            if (cpu_is_davinci_dm355()) {
                  mmcsd0_resources[0].start = DM355_MMCSD0_BASE;
                  mmcsd0_resources[0].end = DM355_MMCSD0_BASE + SZ_4K - 1;
                  mmcsd0_resources[2].start = IRQ_DM355_SDIOINT0;

                  /* expose all 6 MMC0 signals:  CLK, CMD, DATA[0..3] */
                  davinci_cfg_reg(DM355_MMCSD0);

                  /* enable RX EDMA */
                  davinci_cfg_reg(DM355_EVT26_MMC0_RX);
            } else if (cpu_is_davinci_dm365()) {
                  mmcsd0_resources[0].start = DM365_MMCSD0_BASE;
                  mmcsd0_resources[0].end = DM365_MMCSD0_BASE +
                                          SZ_4K - 1;
                  mmcsd0_resources[2].start = IRQ_DM365_SDIOINT0;
            } else if (cpu_is_davinci_dm644x()) {
                  /* REVISIT: should this be in board-init code? */
                  void __iomem *base =
                        IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE);

                  /* Power-on 3.3V IO cells */
                  __raw_writel(0, base + DM64XX_VDD3P3V_PWDN);
                  /*Set up the pull regiter for MMC */
                  davinci_cfg_reg(DM644X_MSTK);
            }

            pdev = &davinci_mmcsd0_device;
            break;
      }

      if (WARN_ON(!pdev))
            return;

      pdev->dev.platform_data = config;
      platform_device_register(pdev);
}

#else

void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
{
}

#endif

/*-------------------------------------------------------------------------*/

static struct resource wdt_resources[] = {
      {
            .start      = DAVINCI_WDOG_BASE,
            .end  = DAVINCI_WDOG_BASE + SZ_1K - 1,
            .flags      = IORESOURCE_MEM,
      },
};

struct platform_device davinci_wdt_device = {
      .name       = "watchdog",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(wdt_resources),
      .resource   = wdt_resources,
};

static void davinci_init_wdt(void)
{
      platform_device_register(&davinci_wdt_device);
}

/*-------------------------------------------------------------------------*/

struct davinci_timer_instance davinci_timer_instance[2] = {
      {
            .base       = IO_ADDRESS(DAVINCI_TIMER0_BASE),
            .bottom_irq = IRQ_TINT0_TINT12,
            .top_irq    = IRQ_TINT0_TINT34,
      },
      {
            .base       = IO_ADDRESS(DAVINCI_TIMER1_BASE),
            .bottom_irq = IRQ_TINT1_TINT12,
            .top_irq    = IRQ_TINT1_TINT34,
      },
};

/*-------------------------------------------------------------------------*/

static int __init davinci_init_devices(void)
{
      /* please keep these calls, and their implementations above,
       * in alphabetical order so they're easier to sort through.
       */
      davinci_init_wdt();

      return 0;
}
arch_initcall(davinci_init_devices);


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