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 <linux/spi/spi.h>

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

#include <plat/tc.h>
#include <plat/board.h>
#include <plat/mux.h>
#include <mach/gpio.h>
#include <plat/mmc.h>
#include <plat/omap7xx.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

static inline void omap_init_mbox(void) { }

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

#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) {
		if (cpu_is_omap7xx()) {
			omap_cfg_reg(MMC_7XX_CMD);
			omap_cfg_reg(MMC_7XX_CLK);
			omap_cfg_reg(MMC_7XX_DAT0);
		} else {
			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 && !cpu_is_omap7xx()) {
			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

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

/* OMAP7xx SPI support */
#if defined(CONFIG_SPI_OMAP_100K) || defined(CONFIG_SPI_OMAP_100K_MODULE)

struct platform_device omap_spi1 = {
	.name           = "omap1_spi100k",
	.id             = 1,
};

struct platform_device omap_spi2 = {
	.name           = "omap1_spi100k",
	.id             = 2,
};

static void omap_init_spi100k(void)
{
	omap_spi1.dev.platform_data = ioremap(OMAP7XX_SPI1_BASE, 0x7ff);
	if (omap_spi1.dev.platform_data)
		platform_device_register(&omap_spi1);

	omap_spi2.dev.platform_data = ioremap(OMAP7XX_SPI2_BASE, 0x7ff);
	if (omap_spi2.dev.platform_data)
		platform_device_register(&omap_spi2);
}

#else
static inline void omap_init_spi100k(void)
{
}
#endif

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

static inline void omap_init_sti(void) {}

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

/*
 * 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_spi100k();
	omap_init_sti();

	return 0;
}
arch_initcall(omap1_init_devices);