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devices.c

/*
 * linux/arch/arm/mach-omap1/devices.c
 *
 * OMAP1 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/io.h>

#include <mach/hardware.h>
#include <asm/mach/map.h>

#include <mach/tc.h>
#include <mach/board.h>
#include <mach/mux.h>
#include <mach/gpio.h>
#include <mach/mmc.h>

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

#if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)

#define     OMAP_RTC_BASE           0xfffb4800

static struct resource rtc_resources[] = {
      {
            .start            = OMAP_RTC_BASE,
            .end        = OMAP_RTC_BASE + 0x5f,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = INT_RTC_TIMER,
            .flags            = IORESOURCE_IRQ,
      },
      {
            .start            = INT_RTC_ALARM,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device omap_rtc_device = {
      .name           = "omap_rtc",
      .id             = -1,
      .num_resources    = ARRAY_SIZE(rtc_resources),
      .resource   = rtc_resources,
};

static void omap_init_rtc(void)
{
      (void) platform_device_register(&omap_rtc_device);
}
#else
static inline void omap_init_rtc(void) {}
#endif

#if defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)

#if defined(CONFIG_ARCH_OMAP15XX)
#  define OMAP1_MBOX_SIZE     0x23
#  define INT_DSP_MAILBOX1    INT_1510_DSP_MAILBOX1
#elif defined(CONFIG_ARCH_OMAP16XX)
#  define OMAP1_MBOX_SIZE     0x2f
#  define INT_DSP_MAILBOX1    INT_1610_DSP_MAILBOX1
#endif

#define OMAP1_MBOX_BASE       OMAP1_IO_ADDRESS(OMAP16XX_MAILBOX_BASE)

static struct resource mbox_resources[] = {
      {
            .start            = OMAP1_MBOX_BASE,
            .end        = OMAP1_MBOX_BASE + OMAP1_MBOX_SIZE,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = INT_DSP_MAILBOX1,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device mbox_device = {
      .name       = "omap1-mailbox",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(mbox_resources),
      .resource   = mbox_resources,
};

static inline void omap_init_mbox(void)
{
      platform_device_register(&mbox_device);
}
#else
static inline void omap_init_mbox(void) { }
#endif

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

#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)

static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
                  int controller_nr)
{
      if (controller_nr == 0) {
            omap_cfg_reg(MMC_CMD);
            omap_cfg_reg(MMC_CLK);
            omap_cfg_reg(MMC_DAT0);
            if (cpu_is_omap1710()) {
                  omap_cfg_reg(M15_1710_MMC_CLKI);
                  omap_cfg_reg(P19_1710_MMC_CMDDIR);
                  omap_cfg_reg(P20_1710_MMC_DATDIR0);
            }
            if (mmc_controller->slots[0].wires == 4) {
                  omap_cfg_reg(MMC_DAT1);
                  /* NOTE: DAT2 can be on W10 (here) or M15 */
                  if (!mmc_controller->slots[0].nomux)
                        omap_cfg_reg(MMC_DAT2);
                  omap_cfg_reg(MMC_DAT3);
            }
      }

      /* Block 2 is on newer chips, and has many pinout options */
      if (cpu_is_omap16xx() && controller_nr == 1) {
            if (!mmc_controller->slots[1].nomux) {
                  omap_cfg_reg(Y8_1610_MMC2_CMD);
                  omap_cfg_reg(Y10_1610_MMC2_CLK);
                  omap_cfg_reg(R18_1610_MMC2_CLKIN);
                  omap_cfg_reg(W8_1610_MMC2_DAT0);
                  if (mmc_controller->slots[1].wires == 4) {
                        omap_cfg_reg(V8_1610_MMC2_DAT1);
                        omap_cfg_reg(W15_1610_MMC2_DAT2);
                        omap_cfg_reg(R10_1610_MMC2_DAT3);
                  }

                  /* These are needed for the level shifter */
                  omap_cfg_reg(V9_1610_MMC2_CMDDIR);
                  omap_cfg_reg(V5_1610_MMC2_DATDIR0);
                  omap_cfg_reg(W19_1610_MMC2_DATDIR1);
            }

            /* Feedback clock must be set on OMAP-1710 MMC2 */
            if (cpu_is_omap1710())
                  omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
                              MOD_CONF_CTRL_1);
      }
}

void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
                  int nr_controllers)
{
      int i;

      for (i = 0; i < nr_controllers; i++) {
            unsigned long base, size;
            unsigned int irq = 0;

            if (!mmc_data[i])
                  continue;

            omap1_mmc_mux(mmc_data[i], i);

            switch (i) {
            case 0:
                  base = OMAP1_MMC1_BASE;
                  irq = INT_MMC;
                  break;
            case 1:
                  if (!cpu_is_omap16xx())
                        return;
                  base = OMAP1_MMC2_BASE;
                  irq = INT_1610_MMC2;
                  break;
            default:
                  continue;
            }
            size = OMAP1_MMC_SIZE;

            omap_mmc_add("mmci-omap", i, base, size, irq, mmc_data[i]);
      };
}

#endif

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

#if defined(CONFIG_OMAP_STI)

#define OMAP1_STI_BASE        0xfffea000
#define OMAP1_STI_CHANNEL_BASE      (OMAP1_STI_BASE + 0x400)

static struct resource sti_resources[] = {
      {
            .start            = OMAP1_STI_BASE,
            .end        = OMAP1_STI_BASE + SZ_1K - 1,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = OMAP1_STI_CHANNEL_BASE,
            .end        = OMAP1_STI_CHANNEL_BASE + SZ_1K - 1,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = INT_1610_STI,
            .flags            = IORESOURCE_IRQ,
      }
};

static struct platform_device sti_device = {
      .name       = "sti",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(sti_resources),
      .resource   = sti_resources,
};

static inline void omap_init_sti(void)
{
      platform_device_register(&sti_device);
}
#else
static inline void omap_init_sti(void) {}
#endif

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

/*
 * This gets called after board-specific INIT_MACHINE, and initializes most
 * on-chip peripherals accessible on this board (except for few like USB):
 *
 *  (a) Does any "standard config" pin muxing needed.  Board-specific
 *    code will have muxed GPIO pins and done "nonstandard" setup;
 *    that code could live in the boot loader.
 *  (b) Populating board-specific platform_data with the data drivers
 *    rely on to handle wiring variations.
 *  (c) Creating platform devices as meaningful on this board and
 *    with this kernel configuration.
 *
 * Claiming GPIOs, and setting their direction and initial values, is the
 * responsibility of the device drivers.  So is responding to probe().
 *
 * Board-specific knowlege like creating devices or pin setup is to be
 * kept out of drivers as much as possible.  In particular, pin setup
 * may be handled by the boot loader, and drivers should expect it will
 * normally have been done by the time they're probed.
 */
static int __init omap1_init_devices(void)
{
      /* please keep these calls, and their implementations above,
       * in alphabetical order so they're easier to sort through.
       */

      omap_init_mbox();
      omap_init_rtc();
      omap_init_sti();

      return 0;
}
arch_initcall(omap1_init_devices);


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