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linux/arch/arm/mach-s5p64x0/common.c
Robin Holt 7b6d864b48 reboot: arm: change reboot_mode to use enum reboot_mode 
Preparing to move the parsing of reboot= to generic kernel code forces
the change in reboot_mode handling to use the enum.

[akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00

450 lines
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/*
* Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Common Codes for S5P64X0 machines
*
* 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/clk.h>
#include <linux/io.h>
#include <linux/device.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/dma-mapping.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/reboot.h>
#include <asm/irq.h>
#include <asm/proc-fns.h>
#include <asm/system_misc.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <mach/map.h>
#include <mach/hardware.h>
#include <mach/regs-clock.h>
#include <mach/regs-gpio.h>
#include <plat/cpu.h>
#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/pm.h>
#include <plat/sdhci.h>
#include <plat/adc-core.h>
#include <plat/fb-core.h>
#include <plat/spi-core.h>
#include <plat/gpio-cfg.h>
#include <plat/regs-irqtype.h>
#include <plat/regs-serial.h>
#include <plat/watchdog-reset.h>
#include "common.h"
static const char name_s5p6440[] = "S5P6440";
static const char name_s5p6450[] = "S5P6450";
static struct cpu_table cpu_ids[] __initdata = {
{
.idcode = S5P6440_CPU_ID,
.idmask = S5P64XX_CPU_MASK,
.map_io = s5p6440_map_io,
.init_clocks = s5p6440_init_clocks,
.init_uarts = s5p6440_init_uarts,
.init = s5p64x0_init,
.name = name_s5p6440,
}, {
.idcode = S5P6450_CPU_ID,
.idmask = S5P64XX_CPU_MASK,
.map_io = s5p6450_map_io,
.init_clocks = s5p6450_init_clocks,
.init_uarts = s5p6450_init_uarts,
.init = s5p64x0_init,
.name = name_s5p6450,
},
};
/* Initial IO mappings */
static struct map_desc s5p64x0_iodesc[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_CHIPID,
.pfn = __phys_to_pfn(S5P64X0_PA_CHIPID),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_SYS,
.pfn = __phys_to_pfn(S5P64X0_PA_SYSCON),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_TIMER,
.pfn = __phys_to_pfn(S5P64X0_PA_TIMER),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_WATCHDOG,
.pfn = __phys_to_pfn(S5P64X0_PA_WDT),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SROMC,
.pfn = __phys_to_pfn(S5P64X0_PA_SROMC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GPIO,
.pfn = __phys_to_pfn(S5P64X0_PA_GPIO),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)VA_VIC0,
.pfn = __phys_to_pfn(S5P64X0_PA_VIC0),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)VA_VIC1,
.pfn = __phys_to_pfn(S5P64X0_PA_VIC1),
.length = SZ_16K,
.type = MT_DEVICE,
},
};
static struct map_desc s5p6440_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_UART,
.pfn = __phys_to_pfn(S5P6440_PA_UART(0)),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc s5p6450_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_UART,
.pfn = __phys_to_pfn(S5P6450_PA_UART(0)),
.length = SZ_512K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_UART + SZ_512K,
.pfn = __phys_to_pfn(S5P6450_PA_UART(5)),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static void s5p64x0_idle(void)
{
unsigned long val;
val = __raw_readl(S5P64X0_PWR_CFG);
val &= ~(0x3 << 5);
val |= (0x1 << 5);
__raw_writel(val, S5P64X0_PWR_CFG);
cpu_do_idle();
}
/*
* s5p64x0_map_io
*
* register the standard CPU IO areas
*/
void __init s5p64x0_init_io(struct map_desc *mach_desc, int size)
{
/* initialize the io descriptors we need for initialization */
iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
if (mach_desc)
iotable_init(mach_desc, size);
/* detect cpu id and rev. */
s5p_init_cpu(S5P64X0_SYS_ID);
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
samsung_wdt_reset_init(S3C_VA_WATCHDOG);
}
void __init s5p6440_map_io(void)
{
/* initialize any device information early */
s3c_adc_setname("s3c64xx-adc");
s3c_fb_setname("s5p64x0-fb");
s3c64xx_spi_setname("s5p64x0-spi");
s5p64x0_default_sdhci0();
s5p64x0_default_sdhci1();
s5p6440_default_sdhci2();
iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
}
void __init s5p6450_map_io(void)
{
/* initialize any device information early */
s3c_adc_setname("s3c64xx-adc");
s3c_fb_setname("s5p64x0-fb");
s3c64xx_spi_setname("s5p64x0-spi");
s5p64x0_default_sdhci0();
s5p64x0_default_sdhci1();
s5p6450_default_sdhci2();
iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6450_iodesc));
}
/*
* s5p64x0_init_clocks
*
* register and setup the CPU clocks
*/
void __init s5p6440_init_clocks(int xtal)
{
printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
s3c24xx_register_baseclocks(xtal);
s5p_register_clocks(xtal);
s5p6440_register_clocks();
s5p6440_setup_clocks();
}
void __init s5p6450_init_clocks(int xtal)
{
printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
s3c24xx_register_baseclocks(xtal);
s5p_register_clocks(xtal);
s5p6450_register_clocks();
s5p6450_setup_clocks();
}
/*
* s5p64x0_init_irq
*
* register the CPU interrupts
*/
void __init s5p6440_init_irq(void)
{
/* S5P6440 supports 2 VIC */
u32 vic[2];
/*
* VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
* VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
*/
vic[0] = 0xff800ae7;
vic[1] = 0xffbf23e5;
s5p_init_irq(vic, ARRAY_SIZE(vic));
}
void __init s5p6450_init_irq(void)
{
/* S5P6450 supports only 2 VIC */
u32 vic[2];
/*
* VIC0 is missing IRQ_VIC0[(13-15), (21-22)]
* VIC1 is missing IRQ VIC1[12, 14, 23]
*/
vic[0] = 0xff9f1fff;
vic[1] = 0xff7fafff;
s5p_init_irq(vic, ARRAY_SIZE(vic));
}
struct bus_type s5p64x0_subsys = {
.name = "s5p64x0-core",
.dev_name = "s5p64x0-core",
};
static struct device s5p64x0_dev = {
.bus = &s5p64x0_subsys,
};
static int __init s5p64x0_core_init(void)
{
return subsys_system_register(&s5p64x0_subsys, NULL);
}
core_initcall(s5p64x0_core_init);
int __init s5p64x0_init(void)
{
printk(KERN_INFO "S5P64X0(S5P6440/S5P6450): Initializing architecture\n");
/* set idle function */
arm_pm_idle = s5p64x0_idle;
return device_register(&s5p64x0_dev);
}
/* uart registration process */
void __init s5p6440_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
int uart;
for (uart = 0; uart < no; uart++) {
s5p_uart_resources[uart].resources->start = S5P6440_PA_UART(uart);
s5p_uart_resources[uart].resources->end = S5P6440_PA_UART(uart) + S5P_SZ_UART;
}
s3c24xx_init_uartdevs("s3c6400-uart", s5p_uart_resources, cfg, no);
}
void __init s5p6450_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
s3c24xx_init_uartdevs("s3c6400-uart", s5p_uart_resources, cfg, no);
}
#define eint_offset(irq) ((irq) - IRQ_EINT(0))
static int s5p64x0_irq_eint_set_type(struct irq_data *data, unsigned int type)
{
int offs = eint_offset(data->irq);
int shift;
u32 ctrl, mask;
u32 newvalue = 0;
if (offs > 15)
return -EINVAL;
switch (type) {
case IRQ_TYPE_NONE:
printk(KERN_WARNING "No edge setting!\n");
break;
case IRQ_TYPE_EDGE_RISING:
newvalue = S3C2410_EXTINT_RISEEDGE;
break;
case IRQ_TYPE_EDGE_FALLING:
newvalue = S3C2410_EXTINT_FALLEDGE;
break;
case IRQ_TYPE_EDGE_BOTH:
newvalue = S3C2410_EXTINT_BOTHEDGE;
break;
case IRQ_TYPE_LEVEL_LOW:
newvalue = S3C2410_EXTINT_LOWLEV;
break;
case IRQ_TYPE_LEVEL_HIGH:
newvalue = S3C2410_EXTINT_HILEV;
break;
default:
printk(KERN_ERR "No such irq type %d", type);
return -EINVAL;
}
shift = (offs / 2) * 4;
mask = 0x7 << shift;
ctrl = __raw_readl(S5P64X0_EINT0CON0) & ~mask;
ctrl |= newvalue << shift;
__raw_writel(ctrl, S5P64X0_EINT0CON0);
/* Configure the GPIO pin for 6450 or 6440 based on CPU ID */
if (soc_is_s5p6450())
s3c_gpio_cfgpin(S5P6450_GPN(offs), S3C_GPIO_SFN(2));
else
s3c_gpio_cfgpin(S5P6440_GPN(offs), S3C_GPIO_SFN(2));
return 0;
}
/*
* s5p64x0_irq_demux_eint
*
* This function demuxes the IRQ from the group0 external interrupts,
* from IRQ_EINT(0) to IRQ_EINT(15). It is designed to be inlined into
* the specific handlers s5p64x0_irq_demux_eintX_Y.
*/
static inline void s5p64x0_irq_demux_eint(unsigned int start, unsigned int end)
{
u32 status = __raw_readl(S5P64X0_EINT0PEND);
u32 mask = __raw_readl(S5P64X0_EINT0MASK);
unsigned int irq;
status &= ~mask;
status >>= start;
status &= (1 << (end - start + 1)) - 1;
for (irq = IRQ_EINT(start); irq <= IRQ_EINT(end); irq++) {
if (status & 1)
generic_handle_irq(irq);
status >>= 1;
}
}
static void s5p64x0_irq_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
{
s5p64x0_irq_demux_eint(0, 3);
}
static void s5p64x0_irq_demux_eint4_11(unsigned int irq, struct irq_desc *desc)
{
s5p64x0_irq_demux_eint(4, 11);
}
static void s5p64x0_irq_demux_eint12_15(unsigned int irq,
struct irq_desc *desc)
{
s5p64x0_irq_demux_eint(12, 15);
}
static int s5p64x0_alloc_gc(void)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
gc = irq_alloc_generic_chip("s5p64x0-eint", 1, S5P_IRQ_EINT_BASE,
S5P_VA_GPIO, handle_level_irq);
if (!gc) {
printk(KERN_ERR "%s: irq_alloc_generic_chip for group 0"
"external interrupts failed\n", __func__);
return -EINVAL;
}
ct = gc->chip_types;
ct->chip.irq_ack = irq_gc_ack_set_bit;
ct->chip.irq_mask = irq_gc_mask_set_bit;
ct->chip.irq_unmask = irq_gc_mask_clr_bit;
ct->chip.irq_set_type = s5p64x0_irq_eint_set_type;
ct->chip.irq_set_wake = s3c_irqext_wake;
ct->regs.ack = EINT0PEND_OFFSET;
ct->regs.mask = EINT0MASK_OFFSET;
irq_setup_generic_chip(gc, IRQ_MSK(16), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST | IRQ_NOPROBE, 0);
return 0;
}
static int __init s5p64x0_init_irq_eint(void)
{
int ret = s5p64x0_alloc_gc();
irq_set_chained_handler(IRQ_EINT0_3, s5p64x0_irq_demux_eint0_3);
irq_set_chained_handler(IRQ_EINT4_11, s5p64x0_irq_demux_eint4_11);
irq_set_chained_handler(IRQ_EINT12_15, s5p64x0_irq_demux_eint12_15);
return ret;
}
arch_initcall(s5p64x0_init_irq_eint);
void s5p64x0_restart(enum reboot_mode mode, const char *cmd)
{
if (mode != REBOOT_SOFT)
samsung_wdt_reset();
soft_restart(0);
}
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