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alistair23-linux/arch/arm/mach-omap2/io.c
Paul Walmsley 55ed96945b OMAP2/3 clkdm/pwrdm: move wkdep/sleepdep handling from pwrdm to clkdm 
Move clockdomain wakeup dependency and sleep dependency data
structures from the powerdomain layer to the clockdomain layer, where
they belong.  These dependencies were originally placed in the
powerdomain layer due to unclear documentation; however, it is clear
now that these dependencies are between clockdomains.  For OMAP2/3,
this is not such a big problem, but for OMAP4 this needs to be fixed.

Thanks to Benoît Cousson <b-cousson@ti.com> for his advice on this
patch.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
2010-01-26 20:12:59 -07:00

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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 <juha.yrjola@nokia.com>
* Syed Khasim <x0khasim@ti.com>
*
* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
*
* 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 <linux/omapfb.h>
#include <asm/tlb.h>
#include <asm/mach/map.h>
#include <plat/mux.h>
#include <plat/sram.h>
#include <plat/sdrc.h>
#include <plat/gpmc.h>
#include <plat/serial.h>
#include <plat/vram.h>
#include "clock.h"
#include <plat/omap-pm.h>
#include <plat/powerdomain.h>
#include "powerdomains.h"
#include <plat/clockdomain.h>
#include "clockdomains.h"
#include <plat/omap_hwmod.h>
#include "omap_hwmod_2420.h"
#include "omap_hwmod_2430.h"
#include "omap_hwmod_34xx.h"
/*
* The machine specific code may provide the extra mapping besides the
* default mapping provided here.
*/
#ifdef CONFIG_ARCH_OMAP24XX
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_ARCH_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_ARCH_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_OMAP34XX
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 = L4_WK_34XX_VIRT,
.pfn = __phys_to_pfn(L4_WK_34XX_PHYS),
.length = L4_WK_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
},
};
#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_WK_44XX_VIRT,
.pfn = __phys_to_pfn(L4_WK_44XX_PHYS),
.length = L4_WK_44XX_SIZE,
.type = MT_DEVICE,
},
{
.virtual = OMAP44XX_GPMC_VIRT,
.pfn = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
.length = OMAP44XX_GPMC_SIZE,
.type = MT_DEVICE,
},
{
.virtual = OMAP44XX_EMIF1_VIRT,
.pfn = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
.length = OMAP44XX_EMIF1_SIZE,
.type = MT_DEVICE,
},
{
.virtual = OMAP44XX_EMIF2_VIRT,
.pfn = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
.length = OMAP44XX_EMIF2_SIZE,
.type = MT_DEVICE,
},
{
.virtual = OMAP44XX_DMM_VIRT,
.pfn = __phys_to_pfn(OMAP44XX_DMM_PHYS),
.length = OMAP44XX_DMM_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,
},
{
.virtual = L4_EMU_44XX_VIRT,
.pfn = __phys_to_pfn(L4_EMU_44XX_PHYS),
.length = L4_EMU_44XX_SIZE,
.type = MT_DEVICE,
},
};
#endif
void __init omap2_map_common_io(void)
{
#if defined(CONFIG_ARCH_OMAP2420)
iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
#endif
#if defined(CONFIG_ARCH_OMAP2430)
iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
#endif
#if defined(CONFIG_ARCH_OMAP34XX)
iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
#endif
#if defined(CONFIG_ARCH_OMAP4)
iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
#endif
/* Normally devicemaps_init() would flush caches and tlb after
* mdesc->map_io(), but we must also do it here because of the CPU
* revision check below.
*/
local_flush_tlb_all();
flush_cache_all();
omap2_check_revision();
omap_sram_init();
omapfb_reserve_sdram();
omap_vram_reserve_sdram();
}
/*
* 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 (!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;
}
void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
struct omap_sdrc_params *sdrc_cs1)
{
struct omap_hwmod **hwmods = NULL;
if (cpu_is_omap2420())
hwmods = omap2420_hwmods;
else if (cpu_is_omap2430())
hwmods = omap2430_hwmods;
else if (cpu_is_omap34xx())
hwmods = omap34xx_hwmods;
pwrdm_init(powerdomains_omap);
clkdm_init(clockdomains_omap, clkdm_autodeps);
#ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
/* The OPP tables have to be registered before a clk init */
omap_hwmod_init(hwmods);
omap2_mux_init();
omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
#endif
omap2_clk_init();
omap_serial_early_init();
#ifndef CONFIG_ARCH_OMAP4
omap_hwmod_late_init();
omap_pm_if_init();
omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
_omap2_init_reprogram_sdrc();
#endif
gpmc_init();
}
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