Linux Kernel iMX6
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10 KiB

/*
* Copyright (c) 2005-2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* 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/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/device.h>
#include <linux/syscore_ops.h>
#include <linux/serial_core.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/i2c/tps65010.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/irq.h>
#include <linux/platform_data/mtd-nand-s3c2410.h>
#include <linux/platform_data/i2c-s3c2410.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/cpu-freq.h>
#include <plat/devs.h>
#include <plat/gpio-cfg.h>
#include <plat/regs-serial.h>
#include <plat/samsung-time.h>
#include <mach/hardware.h>
#include <mach/regs-gpio.h>
#include <mach/regs-lcd.h>
#include <mach/gpio-samsung.h>
#include "common.h"
#include "osiris.h"
#include "regs-mem.h"
/* onboard perihperal map */
static struct map_desc osiris_iodesc[] __initdata = {
/* ISA IO areas (may be over-written later) */
{
.virtual = (u32)S3C24XX_VA_ISA_BYTE,
.pfn = __phys_to_pfn(S3C2410_CS5),
.length = SZ_16M,
.type = MT_DEVICE,
}, {
.virtual = (u32)S3C24XX_VA_ISA_WORD,
.pfn = __phys_to_pfn(S3C2410_CS5),
.length = SZ_16M,
.type = MT_DEVICE,
},
/* CPLD control registers */
{
.virtual = (u32)OSIRIS_VA_CTRL0,
.pfn = __phys_to_pfn(OSIRIS_PA_CTRL0),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (u32)OSIRIS_VA_CTRL1,
.pfn = __phys_to_pfn(OSIRIS_PA_CTRL1),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (u32)OSIRIS_VA_CTRL2,
.pfn = __phys_to_pfn(OSIRIS_PA_CTRL2),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (u32)OSIRIS_VA_IDREG,
.pfn = __phys_to_pfn(OSIRIS_PA_IDREG),
.length = SZ_16K,
.type = MT_DEVICE,
},
};
#define UCON S3C2410_UCON_DEFAULT | S3C2410_UCON_UCLK
#define ULCON S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB
#define UFCON S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE
static struct s3c2410_uartcfg osiris_uartcfgs[] __initdata = {
[0] = {
.hwport = 0,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
.clk_sel = S3C2410_UCON_CLKSEL1 | S3C2410_UCON_CLKSEL2,
},
[1] = {
.hwport = 1,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
.clk_sel = S3C2410_UCON_CLKSEL1 | S3C2410_UCON_CLKSEL2,
},
[2] = {
.hwport = 2,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
.clk_sel = S3C2410_UCON_CLKSEL1 | S3C2410_UCON_CLKSEL2,
}
};
/* NAND Flash on Osiris board */
static int external_map[] = { 2 };
static int chip0_map[] = { 0 };
static int chip1_map[] = { 1 };
static struct mtd_partition __initdata osiris_default_nand_part[] = {
[0] = {
.name = "Boot Agent",
.size = SZ_16K,
.offset = 0,
},
[1] = {
.name = "/boot",
.size = SZ_4M - SZ_16K,
.offset = SZ_16K,
},
[2] = {
.name = "user1",
.offset = SZ_4M,
.size = SZ_32M - SZ_4M,
},
[3] = {
.name = "user2",
.offset = SZ_32M,
.size = MTDPART_SIZ_FULL,
}
};
static struct mtd_partition __initdata osiris_default_nand_part_large[] = {
[0] = {
.name = "Boot Agent",
.size = SZ_128K,
.offset = 0,
},
[1] = {
.name = "/boot",
.size = SZ_4M - SZ_128K,
.offset = SZ_128K,
},
[2] = {
.name = "user1",
.offset = SZ_4M,
.size = SZ_32M - SZ_4M,
},
[3] = {
.name = "user2",
.offset = SZ_32M,
.size = MTDPART_SIZ_FULL,
}
};
/* the Osiris has 3 selectable slots for nand-flash, the two
* on-board chip areas, as well as the external slot.
*
* Note, there is no current hot-plug support for the External
* socket.
*/
static struct s3c2410_nand_set __initdata osiris_nand_sets[] = {
[1] = {
.name = "External",
.nr_chips = 1,
.nr_map = external_map,
.options = NAND_SCAN_SILENT_NODEV,
.nr_partitions = ARRAY_SIZE(osiris_default_nand_part),
.partitions = osiris_default_nand_part,
},
[0] = {
.name = "chip0",
.nr_chips = 1,
.nr_map = chip0_map,
.nr_partitions = ARRAY_SIZE(osiris_default_nand_part),
.partitions = osiris_default_nand_part,
},
[2] = {
.name = "chip1",
.nr_chips = 1,
.nr_map = chip1_map,
.options = NAND_SCAN_SILENT_NODEV,
.nr_partitions = ARRAY_SIZE(osiris_default_nand_part),
.partitions = osiris_default_nand_part,
},
};
static void osiris_nand_select(struct s3c2410_nand_set *set, int slot)
{
unsigned int tmp;
slot = set->nr_map[slot] & 3;
pr_debug("osiris_nand: selecting slot %d (set %p,%p)\n",
slot, set, set->nr_map);
tmp = __raw_readb(OSIRIS_VA_CTRL0);
tmp &= ~OSIRIS_CTRL0_NANDSEL;
tmp |= slot;
pr_debug("osiris_nand: ctrl0 now %02x\n", tmp);
__raw_writeb(tmp, OSIRIS_VA_CTRL0);
}
static struct s3c2410_platform_nand __initdata osiris_nand_info = {
.tacls = 25,
.twrph0 = 60,
.twrph1 = 60,
.nr_sets = ARRAY_SIZE(osiris_nand_sets),
.sets = osiris_nand_sets,
.select_chip = osiris_nand_select,
};
/* PCMCIA control and configuration */
static struct resource osiris_pcmcia_resource[] = {
[0] = DEFINE_RES_MEM(0x0f000000, SZ_1M),
[1] = DEFINE_RES_MEM(0x0c000000, SZ_1M),
};
static struct platform_device osiris_pcmcia = {
.name = "osiris-pcmcia",
.id = -1,
.num_resources = ARRAY_SIZE(osiris_pcmcia_resource),
.resource = osiris_pcmcia_resource,
};
/* Osiris power management device */
#ifdef CONFIG_PM
static unsigned char pm_osiris_ctrl0;
static int osiris_pm_suspend(void)
{
unsigned int tmp;
pm_osiris_ctrl0 = __raw_readb(OSIRIS_VA_CTRL0);
tmp = pm_osiris_ctrl0 & ~OSIRIS_CTRL0_NANDSEL;
/* ensure correct NAND slot is selected on resume */
if ((pm_osiris_ctrl0 & OSIRIS_CTRL0_BOOT_INT) == 0)
tmp |= 2;
__raw_writeb(tmp, OSIRIS_VA_CTRL0);
/* ensure that an nRESET is not generated on resume. */
gpio_request_one(S3C2410_GPA(21), GPIOF_OUT_INIT_HIGH, NULL);
gpio_free(S3C2410_GPA(21));
return 0;
}
static void osiris_pm_resume(void)
{
if (pm_osiris_ctrl0 & OSIRIS_CTRL0_FIX8)
__raw_writeb(OSIRIS_CTRL1_FIX8, OSIRIS_VA_CTRL1);
__raw_writeb(pm_osiris_ctrl0, OSIRIS_VA_CTRL0);
s3c_gpio_cfgpin(S3C2410_GPA(21), S3C2410_GPA21_nRSTOUT);
}
#else
#define osiris_pm_suspend NULL
#define osiris_pm_resume NULL
#endif
static struct syscore_ops osiris_pm_syscore_ops = {
.suspend = osiris_pm_suspend,
.resume = osiris_pm_resume,
};
/* Link for DVS driver to TPS65011 */
static void osiris_tps_release(struct device *dev)
{
/* static device, do not need to release anything */
}
static struct platform_device osiris_tps_device = {
.name = "osiris-dvs",
.id = -1,
.dev.release = osiris_tps_release,
};
static int osiris_tps_setup(struct i2c_client *client, void *context)
{
osiris_tps_device.dev.parent = &client->dev;
return platform_device_register(&osiris_tps_device);
}
static int osiris_tps_remove(struct i2c_client *client, void *context)
{
platform_device_unregister(&osiris_tps_device);
return 0;
}
static struct tps65010_board osiris_tps_board = {
.base = -1, /* GPIO can go anywhere at the moment */
.setup = osiris_tps_setup,
.teardown = osiris_tps_remove,
};
/* I2C devices fitted. */
static struct i2c_board_info osiris_i2c_devs[] __initdata = {
{
I2C_BOARD_INFO("tps65011", 0x48),
.irq = IRQ_EINT20,
.platform_data = &osiris_tps_board,
},
};
/* Standard Osiris devices */
static struct platform_device *osiris_devices[] __initdata = {
&s3c_device_i2c0,
&s3c_device_wdt,
&s3c_device_nand,
&osiris_pcmcia,
};
static struct clk *osiris_clocks[] __initdata = {
&s3c24xx_dclk0,
&s3c24xx_dclk1,
&s3c24xx_clkout0,
&s3c24xx_clkout1,
&s3c24xx_uclk,
};
static struct s3c_cpufreq_board __initdata osiris_cpufreq = {
.refresh = 7800, /* refresh period is 7.8usec */
.auto_io = 1,
.need_io = 1,
};
static void __init osiris_map_io(void)
{
unsigned long flags;
/* initialise the clocks */
s3c24xx_dclk0.parent = &clk_upll;
s3c24xx_dclk0.rate = 12*1000*1000;
s3c24xx_dclk1.parent = &clk_upll;
s3c24xx_dclk1.rate = 24*1000*1000;
s3c24xx_clkout0.parent = &s3c24xx_dclk0;
s3c24xx_clkout1.parent = &s3c24xx_dclk1;
s3c24xx_uclk.parent = &s3c24xx_clkout1;
s3c24xx_register_clocks(osiris_clocks, ARRAY_SIZE(osiris_clocks));
s3c24xx_init_io(osiris_iodesc, ARRAY_SIZE(osiris_iodesc));
s3c24xx_init_clocks(0);
s3c24xx_init_uarts(osiris_uartcfgs, ARRAY_SIZE(osiris_uartcfgs));
samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
/* check for the newer revision boards with large page nand */
if ((__raw_readb(OSIRIS_VA_IDREG) & OSIRIS_ID_REVMASK) >= 4) {
printk(KERN_INFO "OSIRIS-B detected (revision %d)\n",
__raw_readb(OSIRIS_VA_IDREG) & OSIRIS_ID_REVMASK);
osiris_nand_sets[0].partitions = osiris_default_nand_part_large;
osiris_nand_sets[0].nr_partitions = ARRAY_SIZE(osiris_default_nand_part_large);
} else {
/* write-protect line to the NAND */
gpio_request_one(S3C2410_GPA(0), GPIOF_OUT_INIT_HIGH, NULL);
gpio_free(S3C2410_GPA(0));
}
/* fix bus configuration (nBE settings wrong on ABLE pre v2.20) */
local_irq_save(flags);
__raw_writel(__raw_readl(S3C2410_BWSCON) | S3C2410_BWSCON_ST1 | S3C2410_BWSCON_ST2 | S3C2410_BWSCON_ST3 | S3C2410_BWSCON_ST4 | S3C2410_BWSCON_ST5, S3C2410_BWSCON);
local_irq_restore(flags);
}
static void __init osiris_init(void)
{
register_syscore_ops(&osiris_pm_syscore_ops);
s3c_i2c0_set_platdata(NULL);
s3c_nand_set_platdata(&osiris_nand_info);
s3c_cpufreq_setboard(&osiris_cpufreq);
i2c_register_board_info(0, osiris_i2c_devs,
ARRAY_SIZE(osiris_i2c_devs));
platform_add_devices(osiris_devices, ARRAY_SIZE(osiris_devices));
};
MACHINE_START(OSIRIS, "Simtec-OSIRIS")
/* Maintainer: Ben Dooks <ben@simtec.co.uk> */
.atag_offset = 0x100,
.map_io = osiris_map_io,
.init_irq = s3c2440_init_irq,
.init_machine = osiris_init,
.init_time = samsung_timer_init,
.restart = s3c244x_restart,
MACHINE_END