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devices.c

/*
 * linux/arch/arm/plat-omap/devices.c
 *
 * Common platform device setup/initialization for OMAP1 and OMAP2
 *
 * 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 <linux/slab.h>
#include <linux/memblock.h>

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

#include <plat/tc.h>
#include <plat/board.h>
#include <plat/mmc.h>
#include <mach/gpio.h>
#include <plat/menelaus.h>
#include <plat/mcbsp.h>
#include <plat/omap44xx.h>

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

#if defined(CONFIG_OMAP_MCBSP) || defined(CONFIG_OMAP_MCBSP_MODULE)

static struct platform_device **omap_mcbsp_devices;

void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
                              int size)
{
      int i;

      omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *),
                             GFP_KERNEL);
      if (!omap_mcbsp_devices) {
            printk(KERN_ERR "Could not register McBSP devices\n");
            return;
      }

      for (i = 0; i < size; i++) {
            struct platform_device *new_mcbsp;
            int ret;

            new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1);
            if (!new_mcbsp)
                  continue;
            new_mcbsp->dev.platform_data = &config[i];
            ret = platform_device_add(new_mcbsp);
            if (ret) {
                  platform_device_put(new_mcbsp);
                  continue;
            }
            omap_mcbsp_devices[i] = new_mcbsp;
      }
}

#else
void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
                              int size)
{  }
#endif

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

#if defined(CONFIG_SND_OMAP_SOC_MCPDM) || \
            defined(CONFIG_SND_OMAP_SOC_MCPDM_MODULE)

static struct resource mcpdm_resources[] = {
      {
            .name       = "mcpdm_mem",
            .start            = OMAP44XX_MCPDM_BASE,
            .end        = OMAP44XX_MCPDM_BASE + SZ_4K,
            .flags            = IORESOURCE_MEM,
      },
      {
            .name       = "mcpdm_irq",
            .start            = OMAP44XX_IRQ_MCPDM,
            .end        = OMAP44XX_IRQ_MCPDM,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device omap_mcpdm_device = {
      .name       = "omap-mcpdm",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(mcpdm_resources),
      .resource   = mcpdm_resources,
};

static void omap_init_mcpdm(void)
{
      (void) platform_device_register(&omap_mcpdm_device);
}
#else
static inline void omap_init_mcpdm(void) {}
#endif

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

#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
      defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)

#define OMAP_MMC_NR_RES       2

/*
 * Register MMC devices. Called from mach-omap1 and mach-omap2 device init.
 */
int __init omap_mmc_add(const char *name, int id, unsigned long base,
                        unsigned long size, unsigned int irq,
                        struct omap_mmc_platform_data *data)
{
      struct platform_device *pdev;
      struct resource res[OMAP_MMC_NR_RES];
      int ret;

      pdev = platform_device_alloc(name, id);
      if (!pdev)
            return -ENOMEM;

      memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
      res[0].start = base;
      res[0].end = base + size - 1;
      res[0].flags = IORESOURCE_MEM;
      res[1].start = res[1].end = irq;
      res[1].flags = IORESOURCE_IRQ;

      ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
      if (ret == 0)
            ret = platform_device_add_data(pdev, data, sizeof(*data));
      if (ret)
            goto fail;

      ret = platform_device_add(pdev);
      if (ret)
            goto fail;

      /* return device handle to board setup code */
      data->dev = &pdev->dev;
      return 0;

fail:
      platform_device_put(pdev);
      return ret;
}

#endif

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

#if defined(CONFIG_HW_RANDOM_OMAP) || defined(CONFIG_HW_RANDOM_OMAP_MODULE)

#ifdef CONFIG_ARCH_OMAP2
#define     OMAP_RNG_BASE           0x480A0000
#else
#define     OMAP_RNG_BASE           0xfffe5000
#endif

static struct resource rng_resources[] = {
      {
            .start            = OMAP_RNG_BASE,
            .end        = OMAP_RNG_BASE + 0x4f,
            .flags            = IORESOURCE_MEM,
      },
};

static struct platform_device omap_rng_device = {
      .name       = "omap_rng",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(rng_resources),
      .resource   = rng_resources,
};

static void omap_init_rng(void)
{
      (void) platform_device_register(&omap_rng_device);
}
#else
static inline void omap_init_rng(void) {}
#endif

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

/* Numbering for the SPI-capable controllers when used for SPI:
 * spi            = 1
 * uwire    = 2
 * mmc1..2  = 3..4
 * mcbsp1..3      = 5..7
 */

#if defined(CONFIG_SPI_OMAP_UWIRE) || defined(CONFIG_SPI_OMAP_UWIRE_MODULE)

#define     OMAP_UWIRE_BASE         0xfffb3000

static struct resource uwire_resources[] = {
      {
            .start            = OMAP_UWIRE_BASE,
            .end        = OMAP_UWIRE_BASE + 0x20,
            .flags            = IORESOURCE_MEM,
      },
};

static struct platform_device omap_uwire_device = {
      .name    = "omap_uwire",
      .id        = -1,
      .num_resources    = ARRAY_SIZE(uwire_resources),
      .resource   = uwire_resources,
};

static void omap_init_uwire(void)
{
      /* FIXME define and use a boot tag; not all boards will be hooking
       * up devices to the microwire controller, and multi-board configs
       * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
       */

      /* board-specific code must configure chipselects (only a few
       * are normally used) and SCLK/SDI/SDO (each has two choices).
       */
      (void) platform_device_register(&omap_uwire_device);
}
#else
static inline void omap_init_uwire(void) {}
#endif

#if defined(CONFIG_TIDSPBRIDGE) || defined(CONFIG_TIDSPBRIDGE_MODULE)

static phys_addr_t omap_dsp_phys_mempool_base;

void __init omap_dsp_reserve_sdram_memblock(void)
{
      phys_addr_t size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
      phys_addr_t paddr;

      if (!size)
            return;

      paddr = memblock_alloc(size, SZ_1M);
      if (!paddr) {
            pr_err("%s: failed to reserve %x bytes\n",
                        __func__, size);
            return;
      }
      memblock_free(paddr, size);
      memblock_remove(paddr, size);

      omap_dsp_phys_mempool_base = paddr;
}

phys_addr_t omap_dsp_get_mempool_base(void)
{
      return omap_dsp_phys_mempool_base;
}
EXPORT_SYMBOL(omap_dsp_get_mempool_base);
#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 omap_init_devices(void)
{
      /* please keep these calls, and their implementations above,
       * in alphabetical order so they're easier to sort through.
       */
      omap_init_rng();
      omap_init_mcpdm();
      omap_init_uwire();
      return 0;
}
arch_initcall(omap_init_devices);

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