io.c

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/*
 * linux/arch/arm/mach-omap2/io.c
 *
 * OMAP2 I/O mapping code
 *
 * Copyright (C) 2005 Nokia Corporation
 * Copyright (C) 2007-2009 Texas Instruments
 *
 * Author:
 *  Juha Yrjola <[email protected]>
 *  Syed Khasim <[email protected]>
 *
 * Added OMAP4 support - Santosh Shilimkar <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/clk.h>

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

#include <plat/sram.h>
#include <plat/sdrc.h>
#include <plat/serial.h>
#include <plat/omap-pm.h>
#include <plat/omap_hwmod.h>
#include <plat/multi.h>
#include <plat/dma.h>

#include "soc.h"
#include "iomap.h"
#include "voltage.h"
#include "powerdomain.h"
#include "clockdomain.h"
#include "common.h"
#include "clock.h"
#include "clock2xxx.h"
#include "clock3xxx.h"
#include "clock44xx.h"

/*
 * The machine specific code may provide the extra mapping besides the
 * default mapping provided here.
 */

#if defined(CONFIG_SOC_OMAP2420) || defined(CONFIG_SOC_OMAP2430)
static struct map_desc omap24xx_io_desc[] __initdata = {
    {
        .virtual    = L3_24XX_VIRT,
        .pfn        = __phys_to_pfn(L3_24XX_PHYS),
        .length     = L3_24XX_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = L4_24XX_VIRT,
        .pfn        = __phys_to_pfn(L4_24XX_PHYS),
        .length     = L4_24XX_SIZE,
        .type       = MT_DEVICE
    },
};

#ifdef CONFIG_SOC_OMAP2420
static struct map_desc omap242x_io_desc[] __initdata = {
    {
        .virtual    = DSP_MEM_2420_VIRT,
        .pfn        = __phys_to_pfn(DSP_MEM_2420_PHYS),
        .length     = DSP_MEM_2420_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = DSP_IPI_2420_VIRT,
        .pfn        = __phys_to_pfn(DSP_IPI_2420_PHYS),
        .length     = DSP_IPI_2420_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = DSP_MMU_2420_VIRT,
        .pfn        = __phys_to_pfn(DSP_MMU_2420_PHYS),
        .length     = DSP_MMU_2420_SIZE,
        .type       = MT_DEVICE
    },
};

#endif

#ifdef CONFIG_SOC_OMAP2430
static struct map_desc omap243x_io_desc[] __initdata = {
    {
        .virtual    = L4_WK_243X_VIRT,
        .pfn        = __phys_to_pfn(L4_WK_243X_PHYS),
        .length     = L4_WK_243X_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = OMAP243X_GPMC_VIRT,
        .pfn        = __phys_to_pfn(OMAP243X_GPMC_PHYS),
        .length     = OMAP243X_GPMC_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = OMAP243X_SDRC_VIRT,
        .pfn        = __phys_to_pfn(OMAP243X_SDRC_PHYS),
        .length     = OMAP243X_SDRC_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = OMAP243X_SMS_VIRT,
        .pfn        = __phys_to_pfn(OMAP243X_SMS_PHYS),
        .length     = OMAP243X_SMS_SIZE,
        .type       = MT_DEVICE
    },
};
#endif
#endif

#ifdef  CONFIG_ARCH_OMAP3
static struct map_desc omap34xx_io_desc[] __initdata = {
    {
        .virtual    = L3_34XX_VIRT,
        .pfn        = __phys_to_pfn(L3_34XX_PHYS),
        .length     = L3_34XX_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = L4_34XX_VIRT,
        .pfn        = __phys_to_pfn(L4_34XX_PHYS),
        .length     = L4_34XX_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = OMAP34XX_GPMC_VIRT,
        .pfn        = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
        .length     = OMAP34XX_GPMC_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = OMAP343X_SMS_VIRT,
        .pfn        = __phys_to_pfn(OMAP343X_SMS_PHYS),
        .length     = OMAP343X_SMS_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = OMAP343X_SDRC_VIRT,
        .pfn        = __phys_to_pfn(OMAP343X_SDRC_PHYS),
        .length     = OMAP343X_SDRC_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = L4_PER_34XX_VIRT,
        .pfn        = __phys_to_pfn(L4_PER_34XX_PHYS),
        .length     = L4_PER_34XX_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = L4_EMU_34XX_VIRT,
        .pfn        = __phys_to_pfn(L4_EMU_34XX_PHYS),
        .length     = L4_EMU_34XX_SIZE,
        .type       = MT_DEVICE
    },
#if defined(CONFIG_DEBUG_LL) &&                         \
    (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
    {
        .virtual    = ZOOM_UART_VIRT,
        .pfn        = __phys_to_pfn(ZOOM_UART_BASE),
        .length     = SZ_1M,
        .type       = MT_DEVICE
    },
#endif
};
#endif

#ifdef CONFIG_SOC_TI81XX
static struct map_desc omapti81xx_io_desc[] __initdata = {
    {
        .virtual    = L4_34XX_VIRT,
        .pfn        = __phys_to_pfn(L4_34XX_PHYS),
        .length     = L4_34XX_SIZE,
        .type       = MT_DEVICE
    }
};
#endif

#ifdef CONFIG_SOC_AM33XX
static struct map_desc omapam33xx_io_desc[] __initdata = {
    {
        .virtual    = L4_34XX_VIRT,
        .pfn        = __phys_to_pfn(L4_34XX_PHYS),
        .length     = L4_34XX_SIZE,
        .type       = MT_DEVICE
    },
    {
        .virtual    = L4_WK_AM33XX_VIRT,
        .pfn        = __phys_to_pfn(L4_WK_AM33XX_PHYS),
        .length     = L4_WK_AM33XX_SIZE,
        .type       = MT_DEVICE
    }
};
#endif

#ifdef  CONFIG_ARCH_OMAP4
static struct map_desc omap44xx_io_desc[] __initdata = {
    {
        .virtual    = L3_44XX_VIRT,
        .pfn        = __phys_to_pfn(L3_44XX_PHYS),
        .length     = L3_44XX_SIZE,
        .type       = MT_DEVICE,
    },
    {
        .virtual    = L4_44XX_VIRT,
        .pfn        = __phys_to_pfn(L4_44XX_PHYS),
        .length     = L4_44XX_SIZE,
        .type       = MT_DEVICE,
    },
    {
        .virtual    = L4_PER_44XX_VIRT,
        .pfn        = __phys_to_pfn(L4_PER_44XX_PHYS),
        .length     = L4_PER_44XX_SIZE,
        .type       = MT_DEVICE,
    },
#ifdef CONFIG_OMAP4_ERRATA_I688
    {
        .virtual    = OMAP4_SRAM_VA,
        .pfn        = __phys_to_pfn(OMAP4_SRAM_PA),
        .length     = PAGE_SIZE,
        .type       = MT_MEMORY_SO,
    },
#endif

};
#endif

#ifdef  CONFIG_SOC_OMAP5
static struct map_desc omap54xx_io_desc[] __initdata = {
    {
        .virtual    = L3_54XX_VIRT,
        .pfn        = __phys_to_pfn(L3_54XX_PHYS),
        .length     = L3_54XX_SIZE,
        .type       = MT_DEVICE,
    },
    {
        .virtual    = L4_54XX_VIRT,
        .pfn        = __phys_to_pfn(L4_54XX_PHYS),
        .length     = L4_54XX_SIZE,
        .type       = MT_DEVICE,
    },
    {
        .virtual    = L4_WK_54XX_VIRT,
        .pfn        = __phys_to_pfn(L4_WK_54XX_PHYS),
        .length     = L4_WK_54XX_SIZE,
        .type       = MT_DEVICE,
    },
    {
        .virtual    = L4_PER_54XX_VIRT,
        .pfn        = __phys_to_pfn(L4_PER_54XX_PHYS),
        .length     = L4_PER_54XX_SIZE,
        .type       = MT_DEVICE,
    },
};
#endif

#ifdef CONFIG_SOC_OMAP2420
void __init omap242x_map_common_io(void)
{
    iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
    iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
}
#endif

#ifdef CONFIG_SOC_OMAP2430
void __init omap243x_map_common_io(void)
{
    iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
    iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
}
#endif

#ifdef CONFIG_ARCH_OMAP3
void __init omap34xx_map_common_io(void)
{
    iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
}
#endif

#ifdef CONFIG_SOC_TI81XX
void __init omapti81xx_map_common_io(void)
{
    iotable_init(omapti81xx_io_desc, ARRAY_SIZE(omapti81xx_io_desc));
}
#endif

#ifdef CONFIG_SOC_AM33XX
void __init omapam33xx_map_common_io(void)
{
    iotable_init(omapam33xx_io_desc, ARRAY_SIZE(omapam33xx_io_desc));
}
#endif

#ifdef CONFIG_ARCH_OMAP4
void __init omap44xx_map_common_io(void)
{
    iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
    omap_barriers_init();
}
#endif

#ifdef CONFIG_SOC_OMAP5
void __init omap5_map_common_io(void)
{
    iotable_init(omap54xx_io_desc, ARRAY_SIZE(omap54xx_io_desc));
}
#endif
/*
 * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 *
 * Sets the CORE DPLL3 M2 divider to the same value that it's at
 * currently.  This has the effect of setting the SDRC SDRAM AC timing
 * registers to the values currently defined by the kernel.  Currently
 * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 * or passes along the return value of clk_set_rate().
 */
static int __init _omap2_init_reprogram_sdrc(void)
{
    struct clk *dpll3_m2_ck;
    int v = -EINVAL;
    long rate;

    if (!cpu_is_omap34xx())
        return 0;

    dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
    if (IS_ERR(dpll3_m2_ck))
        return -EINVAL;

    rate = clk_get_rate(dpll3_m2_ck);
    pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
    v = clk_set_rate(dpll3_m2_ck, rate);
    if (v)
        pr_err("dpll3_m2_clk rate change failed: %d\n", v);

    clk_put(dpll3_m2_ck);

    return v;
}

static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
{
    return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
}

static void __init omap_common_init_early(void)
{
    omap_init_consistent_dma_size();
}

static void __init omap_hwmod_init_postsetup(void)
{
    u8 postsetup_state;

    /* Set the default postsetup state for all hwmods */
#ifdef CONFIG_PM_RUNTIME
    postsetup_state = _HWMOD_STATE_IDLE;
#else
    postsetup_state = _HWMOD_STATE_ENABLED;
#endif
    omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);

    omap_pm_if_early_init();
}

#ifdef CONFIG_SOC_OMAP2420
void __init omap2420_init_early(void)
{
    omap2_set_globals_242x();
    omap2xxx_check_revision();
    omap_common_init_early();
    omap2xxx_voltagedomains_init();
    omap242x_powerdomains_init();
    omap242x_clockdomains_init();
    omap2420_hwmod_init();
    omap_hwmod_init_postsetup();
    omap2420_clk_init();
}

void __init omap2420_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap2_pm_init();
}
#endif

#ifdef CONFIG_SOC_OMAP2430
void __init omap2430_init_early(void)
{
    omap2_set_globals_243x();
    omap2xxx_check_revision();
    omap_common_init_early();
    omap2xxx_voltagedomains_init();
    omap243x_powerdomains_init();
    omap243x_clockdomains_init();
    omap2430_hwmod_init();
    omap_hwmod_init_postsetup();
    omap2430_clk_init();
}

void __init omap2430_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap2_pm_init();
}
#endif

/*
 * Currently only board-omap3beagle.c should call this because of the
 * same machine_id for 34xx and 36xx beagle.. Will get fixed with DT.
 */
#ifdef CONFIG_ARCH_OMAP3
void __init omap3_init_early(void)
{
    omap2_set_globals_3xxx();
    omap3xxx_check_revision();
    omap3xxx_check_features();
    omap_common_init_early();
    omap3xxx_voltagedomains_init();
    omap3xxx_powerdomains_init();
    omap3xxx_clockdomains_init();
    omap3xxx_hwmod_init();
    omap_hwmod_init_postsetup();
    omap3xxx_clk_init();
}

void __init omap3430_init_early(void)
{
    omap3_init_early();
}

void __init omap35xx_init_early(void)
{
    omap3_init_early();
}

void __init omap3630_init_early(void)
{
    omap3_init_early();
}

void __init am35xx_init_early(void)
{
    omap3_init_early();
}

void __init ti81xx_init_early(void)
{
    omap2_set_globals_ti81xx();
    omap3xxx_check_revision();
    ti81xx_check_features();
    omap_common_init_early();
    omap3xxx_voltagedomains_init();
    omap3xxx_powerdomains_init();
    omap3xxx_clockdomains_init();
    omap3xxx_hwmod_init();
    omap_hwmod_init_postsetup();
    omap3xxx_clk_init();
}

void __init omap3_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap3_pm_init();
}

void __init omap3430_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap3_pm_init();
}

void __init omap35xx_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap3_pm_init();
}

void __init omap3630_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap3_pm_init();
}

void __init am35xx_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap3_pm_init();
}

void __init ti81xx_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap3_pm_init();
}
#endif

#ifdef CONFIG_SOC_AM33XX
void __init am33xx_init_early(void)
{
    omap2_set_globals_am33xx();
    omap3xxx_check_revision();
    ti81xx_check_features();
    omap_common_init_early();
    am33xx_voltagedomains_init();
    am33xx_powerdomains_init();
    am33xx_clockdomains_init();
    am33xx_hwmod_init();
    omap_hwmod_init_postsetup();
    am33xx_clk_init();
}
#endif

#ifdef CONFIG_ARCH_OMAP4
void __init omap4430_init_early(void)
{
    omap2_set_globals_443x();
    omap4xxx_check_revision();
    omap4xxx_check_features();
    omap_common_init_early();
    omap44xx_voltagedomains_init();
    omap44xx_powerdomains_init();
    omap44xx_clockdomains_init();
    omap44xx_hwmod_init();
    omap_hwmod_init_postsetup();
    omap4xxx_clk_init();
}

void __init omap4430_init_late(void)
{
    omap_mux_late_init();
    omap2_common_pm_late_init();
    omap4_pm_init();
}
#endif

#ifdef CONFIG_SOC_OMAP5
void __init omap5_init_early(void)
{
    omap2_set_globals_5xxx();
    omap5xxx_check_revision();
    omap_common_init_early();
}
#endif

void __init omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
                      struct omap_sdrc_params *sdrc_cs1)
{
    omap_sram_init();

    if (cpu_is_omap24xx() || omap3_has_sdrc()) {
        omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
        _omap2_init_reprogram_sdrc();
    }
}