korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-02 16:44:10 +08:00
Code Issues Packages Projects Releases Wiki Activity
34ae0dadb4
linux/arch/arm/mach-exynos/common.c
Linus Torvalds f465d145d7 arm-soc: sweeping late_initcall cleanup 
This is a patch series from Shawn Guo that moves from individual
 late_initcalls() to using a member in the machine structure to invoke
 a platform's late initcalls.
 
 This cleanup is a step in the move towards multiplatform kernels since
 it would reduce the need to check for compatible platforms in each and
 every initcall.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJPwHYJAAoJEIwa5zzehBx3PugP/2Wd6HN030iO5EhFBcBcrh5T
 WaJ4KfzK3tWev5QA3idvenVNhk5My1HQ+PLij7BLpjNqKCKlNK0k/K9wMI5X827T
 wkFFprdUcoMVrB1ZCjzwCk4/uTGWB5BMxoZ6mlBh1sZIR/yXo91t+wO971Uqr0ho
 Ky1oW9uaPZ6Eja00iDLkfJfygquA5+zNb0a29q19zWnHlRkH76jtqZgfDKy9I2nq
 virYZ4uhoPnY2g1JxhnaMNNC861CgfTDEtmtNjgeEbA6t9bbjqsZoQRhcYHZP4OM
 a4Iu8FOyIvAAzQzUglfAZ4Ar4uYTmVRnG39XFh4wK/8tJYt0hEQwFS26B0pYKx/5
 F76bwc4SqO7H9AWBF0WhyUbny5XmJcNwJjobm/oCeAvemTi3xA6BbubyfKMHPoIr
 dDSEqcAcMt9G6sS48h3Pm0caEYDVzxf202vdylz1JABiJZi1W/7v+NMdhujfotJh
 7IGehNRu0foPEsRIS9wsvD2TzSdQtDdjyFkGHd83XMc3JpvwmyePO6ynbbxrVnJJ
 HzlPnbLIk3VyqyVCqVXj21NKEY1dbsYPItketAwwzc1BUGcld0qvQY/t/UI4JQT6
 9vq77AwNjUhfomDdEWTp7aNx0whkY0R5KEY9jHjuu9WoE+xdPZbQKm589AJ6LA4U
 j6HPMzWKUHOKT6g10rCl
 =21h6
 -----END PGP SIGNATURE-----

Merge tag 'cleanup-initcall' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull sweeping late_initcall cleanup for arm-soc from Olof Johansson:
 "This is a patch series from Shawn Guo that moves from individual
  late_initcalls() to using a member in the machine structure to invoke
  a platform's late initcalls.

  This cleanup is a step in the move towards multiplatform kernels since
  it would reduce the need to check for compatible platforms in each and
  every initcall."

Fix up trivial conflicts in arch/arm/mach-{exynos/mach-universal_c210.c,
imx/mach-cpuimx51.c, omap2/board-generic.c} due to changes nearby (and,
in the case of cpuimx51.c the board support being deleted)

* tag 'cleanup-initcall' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: ux500: use machine specific hook for late init
  ARM: tegra: use machine specific hook for late init
  ARM: shmobile: use machine specific hook for late init
  ARM: sa1100: use machine specific hook for late init
  ARM: s3c64xx: use machine specific hook for late init
  ARM: prima2: use machine specific hook for late init
  ARM: pnx4008: use machine specific hook for late init
  ARM: omap2: use machine specific hook for late init
  ARM: omap1: use machine specific hook for late init
  ARM: msm: use machine specific hook for late init
  ARM: imx: use machine specific hook for late init
  ARM: exynos: use machine specific hook for late init
  ARM: ep93xx: use machine specific hook for late init
  ARM: davinci: use machine specific hook for late init
  ARM: provide a late_initcall hook for platform initialization
2012-05-26 13:14:01 -07:00

1044 lines
25 KiB
C
Raw Blame History

/*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Common Codes for EXYNOS
*
* 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/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/sched.h>
#include <linux/serial_core.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/export.h>
#include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <asm/proc-fns.h>
#include <asm/exception.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/cacheflush.h>
#include <mach/regs-irq.h>
#include <mach/regs-pmu.h>
#include <mach/regs-gpio.h>
#include <mach/pmu.h>
#include <plat/cpu.h>
#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/pm.h>
#include <plat/sdhci.h>
#include <plat/gpio-cfg.h>
#include <plat/adc-core.h>
#include <plat/fb-core.h>
#include <plat/fimc-core.h>
#include <plat/iic-core.h>
#include <plat/tv-core.h>
#include <plat/regs-serial.h>
#include "common.h"
#define L2_AUX_VAL 0x7C470001
#define L2_AUX_MASK 0xC200ffff
static const char name_exynos4210[] = "EXYNOS4210";
static const char name_exynos4212[] = "EXYNOS4212";
static const char name_exynos4412[] = "EXYNOS4412";
static const char name_exynos5250[] = "EXYNOS5250";
static void exynos4_map_io(void);
static void exynos5_map_io(void);
static void exynos4_init_clocks(int xtal);
static void exynos5_init_clocks(int xtal);
static void exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no);
static int exynos_init(void);
static struct cpu_table cpu_ids[] __initdata = {
{
.idcode = EXYNOS4210_CPU_ID,
.idmask = EXYNOS4_CPU_MASK,
.map_io = exynos4_map_io,
.init_clocks = exynos4_init_clocks,
.init_uarts = exynos_init_uarts,
.init = exynos_init,
.name = name_exynos4210,
}, {
.idcode = EXYNOS4212_CPU_ID,
.idmask = EXYNOS4_CPU_MASK,
.map_io = exynos4_map_io,
.init_clocks = exynos4_init_clocks,
.init_uarts = exynos_init_uarts,
.init = exynos_init,
.name = name_exynos4212,
}, {
.idcode = EXYNOS4412_CPU_ID,
.idmask = EXYNOS4_CPU_MASK,
.map_io = exynos4_map_io,
.init_clocks = exynos4_init_clocks,
.init_uarts = exynos_init_uarts,
.init = exynos_init,
.name = name_exynos4412,
}, {
.idcode = EXYNOS5250_SOC_ID,
.idmask = EXYNOS5_SOC_MASK,
.map_io = exynos5_map_io,
.init_clocks = exynos5_init_clocks,
.init_uarts = exynos_init_uarts,
.init = exynos_init,
.name = name_exynos5250,
},
};
/* Initial IO mappings */
static struct map_desc exynos_iodesc[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_CHIPID,
.pfn = __phys_to_pfn(EXYNOS_PA_CHIPID),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_SYS,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_TIMER,
.pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_WATCHDOG,
.pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SROMC,
.pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SYSTIMER,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_PMU,
.pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_COMBINER_BASE,
.pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GIC_CPU,
.pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GIC_DIST,
.pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_UART,
.pfn = __phys_to_pfn(EXYNOS4_PA_UART),
.length = SZ_512K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_CMU,
.pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
.length = SZ_128K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_COREPERI_BASE,
.pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
.length = SZ_8K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_L2CC,
.pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_DMC0,
.pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_DMC1,
.pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_USB_HSPHY,
.pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4_iodesc0[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4_iodesc1[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos5_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_SYS,
.pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_TIMER,
.pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_WATCHDOG,
.pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SROMC,
.pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SYSTIMER,
.pfn = __phys_to_pfn(EXYNOS5_PA_SYSTIMER),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SYSRAM,
.pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_CMU,
.pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
.length = 144 * SZ_1K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_PMU,
.pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_COMBINER_BASE,
.pfn = __phys_to_pfn(EXYNOS5_PA_COMBINER),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_UART,
.pfn = __phys_to_pfn(EXYNOS5_PA_UART),
.length = SZ_512K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GIC_CPU,
.pfn = __phys_to_pfn(EXYNOS5_PA_GIC_CPU),
.length = SZ_8K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GIC_DIST,
.pfn = __phys_to_pfn(EXYNOS5_PA_GIC_DIST),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
void exynos4_restart(char mode, const char *cmd)
{
__raw_writel(0x1, S5P_SWRESET);
}
void exynos5_restart(char mode, const char *cmd)
{
__raw_writel(0x1, EXYNOS_SWRESET);
}
void __init exynos_init_late(void)
{
exynos_pm_late_initcall();
}
/*
* exynos_map_io
*
* register the standard cpu IO areas
*/
void __init exynos_init_io(struct map_desc *mach_desc, int size)
{
/* initialize the io descriptors we need for initialization */
iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));
if (mach_desc)
iotable_init(mach_desc, size);
/* detect cpu id and rev. */
s5p_init_cpu(S5P_VA_CHIPID);
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
}
static void __init exynos4_map_io(void)
{
iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
else
iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
/* initialize device information early */
exynos4_default_sdhci0();
exynos4_default_sdhci1();
exynos4_default_sdhci2();
exynos4_default_sdhci3();
s3c_adc_setname("samsung-adc-v3");
s3c_fimc_setname(0, "exynos4-fimc");
s3c_fimc_setname(1, "exynos4-fimc");
s3c_fimc_setname(2, "exynos4-fimc");
s3c_fimc_setname(3, "exynos4-fimc");
s3c_sdhci_setname(0, "exynos4-sdhci");
s3c_sdhci_setname(1, "exynos4-sdhci");
s3c_sdhci_setname(2, "exynos4-sdhci");
s3c_sdhci_setname(3, "exynos4-sdhci");
/* The I2C bus controllers are directly compatible with s3c2440 */
s3c_i2c0_setname("s3c2440-i2c");
s3c_i2c1_setname("s3c2440-i2c");
s3c_i2c2_setname("s3c2440-i2c");
s5p_fb_setname(0, "exynos4-fb");
s5p_hdmi_setname("exynos4-hdmi");
}
static void __init exynos5_map_io(void)
{
iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
s3c_device_i2c0.resource[0].start = EXYNOS5_PA_IIC(0);
s3c_device_i2c0.resource[0].end = EXYNOS5_PA_IIC(0) + SZ_4K - 1;
s3c_device_i2c0.resource[1].start = EXYNOS5_IRQ_IIC;
s3c_device_i2c0.resource[1].end = EXYNOS5_IRQ_IIC;
s3c_sdhci_setname(0, "exynos4-sdhci");
s3c_sdhci_setname(1, "exynos4-sdhci");
s3c_sdhci_setname(2, "exynos4-sdhci");
s3c_sdhci_setname(3, "exynos4-sdhci");
/* The I2C bus controllers are directly compatible with s3c2440 */
s3c_i2c0_setname("s3c2440-i2c");
s3c_i2c1_setname("s3c2440-i2c");
s3c_i2c2_setname("s3c2440-i2c");
}
static void __init exynos4_init_clocks(int xtal)
{
printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
s3c24xx_register_baseclocks(xtal);
s5p_register_clocks(xtal);
if (soc_is_exynos4210())
exynos4210_register_clocks();
else if (soc_is_exynos4212() || soc_is_exynos4412())
exynos4212_register_clocks();
exynos4_register_clocks();
exynos4_setup_clocks();
}
static void __init exynos5_init_clocks(int xtal)
{
printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
s3c24xx_register_baseclocks(xtal);
s5p_register_clocks(xtal);
exynos5_register_clocks();
exynos5_setup_clocks();
}
#define COMBINER_ENABLE_SET 0x0
#define COMBINER_ENABLE_CLEAR 0x4
#define COMBINER_INT_STATUS 0xC
static DEFINE_SPINLOCK(irq_controller_lock);
struct combiner_chip_data {
unsigned int irq_offset;
unsigned int irq_mask;
void __iomem *base;
};
static struct irq_domain *combiner_irq_domain;
static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
static inline void __iomem *combiner_base(struct irq_data *data)
{
struct combiner_chip_data *combiner_data =
irq_data_get_irq_chip_data(data);
return combiner_data->base;
}
static void combiner_mask_irq(struct irq_data *data)
{
u32 mask = 1 << (data->hwirq % 32);
__raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
}
static void combiner_unmask_irq(struct irq_data *data)
{
u32 mask = 1 << (data->hwirq % 32);
__raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
}
static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
{
struct combiner_chip_data *chip_data = irq_get_handler_data(irq);
struct irq_chip *chip = irq_get_chip(irq);
unsigned int cascade_irq, combiner_irq;
unsigned long status;
chained_irq_enter(chip, desc);
spin_lock(&irq_controller_lock);
status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
spin_unlock(&irq_controller_lock);
status &= chip_data->irq_mask;
if (status == 0)
goto out;
combiner_irq = __ffs(status);
cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
if (unlikely(cascade_irq >= NR_IRQS))
do_bad_IRQ(cascade_irq, desc);
else
generic_handle_irq(cascade_irq);
out:
chained_irq_exit(chip, desc);
}
static struct irq_chip combiner_chip = {
.name = "COMBINER",
.irq_mask = combiner_mask_irq,
.irq_unmask = combiner_unmask_irq,
};
static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
{
unsigned int max_nr;
if (soc_is_exynos5250())
max_nr = EXYNOS5_MAX_COMBINER_NR;
else
max_nr = EXYNOS4_MAX_COMBINER_NR;
if (combiner_nr >= max_nr)
BUG();
if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
BUG();
irq_set_chained_handler(irq, combiner_handle_cascade_irq);
}
static void __init combiner_init_one(unsigned int combiner_nr,
void __iomem *base)
{
combiner_data[combiner_nr].base = base;
combiner_data[combiner_nr].irq_offset = irq_find_mapping(
combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER);
combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
/* Disable all interrupts */
__raw_writel(combiner_data[combiner_nr].irq_mask,
base + COMBINER_ENABLE_CLEAR);
}
#ifdef CONFIG_OF
static int combiner_irq_domain_xlate(struct irq_domain *d,
struct device_node *controller,
const u32 *intspec, unsigned int intsize,
unsigned long *out_hwirq,
unsigned int *out_type)
{
if (d->of_node != controller)
return -EINVAL;
if (intsize < 2)
return -EINVAL;
*out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1];
*out_type = 0;
return 0;
}
#else
static int combiner_irq_domain_xlate(struct irq_domain *d,
struct device_node *controller,
const u32 *intspec, unsigned int intsize,
unsigned long *out_hwirq,
unsigned int *out_type)
{
return -EINVAL;
}
#endif
static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
irq_set_chip_and_handler(irq, &combiner_chip, handle_level_irq);
irq_set_chip_data(irq, &combiner_data[hw >> 3]);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
return 0;
}
static struct irq_domain_ops combiner_irq_domain_ops = {
.xlate = combiner_irq_domain_xlate,
.map = combiner_irq_domain_map,
};
void __init combiner_init(void __iomem *combiner_base, struct device_node *np)
{
int i, irq, irq_base;
unsigned int max_nr, nr_irq;
if (np) {
if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
pr_warning("%s: number of combiners not specified, "
"setting default as %d.\n",
__func__, EXYNOS4_MAX_COMBINER_NR);
max_nr = EXYNOS4_MAX_COMBINER_NR;
}
} else {
max_nr = soc_is_exynos5250() ? EXYNOS5_MAX_COMBINER_NR :
EXYNOS4_MAX_COMBINER_NR;
}
nr_irq = max_nr * MAX_IRQ_IN_COMBINER;
irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0);
if (IS_ERR_VALUE(irq_base)) {
irq_base = COMBINER_IRQ(0, 0);
pr_warning("%s: irq desc alloc failed. Continuing with %d as linux irq base\n", __func__, irq_base);
}
combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0,
&combiner_irq_domain_ops, &combiner_data);
if (WARN_ON(!combiner_irq_domain)) {
pr_warning("%s: irq domain init failed\n", __func__);
return;
}
for (i = 0; i < max_nr; i++) {
combiner_init_one(i, combiner_base + (i >> 2) * 0x10);
irq = IRQ_SPI(i);
#ifdef CONFIG_OF
if (np)
irq = irq_of_parse_and_map(np, i);
#endif
combiner_cascade_irq(i, irq);
}
}
#ifdef CONFIG_OF
int __init combiner_of_init(struct device_node *np, struct device_node *parent)
{
void __iomem *combiner_base;
combiner_base = of_iomap(np, 0);
if (!combiner_base) {
pr_err("%s: failed to map combiner registers\n", __func__);
return -ENXIO;
}
combiner_init(combiner_base, np);
return 0;
}
static const struct of_device_id exynos4_dt_irq_match[] = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
{ .compatible = "samsung,exynos4210-combiner",
.data = combiner_of_init, },
{},
};
#endif
void __init exynos4_init_irq(void)
{
unsigned int gic_bank_offset;
gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
if (!of_have_populated_dt())
gic_init_bases(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU, gic_bank_offset, NULL);
#ifdef CONFIG_OF
else
of_irq_init(exynos4_dt_irq_match);
#endif
if (!of_have_populated_dt())
combiner_init(S5P_VA_COMBINER_BASE, NULL);
/*
* The parameters of s5p_init_irq() are for VIC init.
* Theses parameters should be NULL and 0 because EXYNOS4
* uses GIC instead of VIC.
*/
s5p_init_irq(NULL, 0);
}
void __init exynos5_init_irq(void)
{
#ifdef CONFIG_OF
of_irq_init(exynos4_dt_irq_match);
#endif
/*
* The parameters of s5p_init_irq() are for VIC init.
* Theses parameters should be NULL and 0 because EXYNOS4
* uses GIC instead of VIC.
*/
s5p_init_irq(NULL, 0);
}
struct bus_type exynos_subsys = {
.name = "exynos-core",
.dev_name = "exynos-core",
};
static struct device exynos4_dev = {
.bus = &exynos_subsys,
};
static int __init exynos_core_init(void)
{
return subsys_system_register(&exynos_subsys, NULL);
}
core_initcall(exynos_core_init);
#ifdef CONFIG_CACHE_L2X0
static int __init exynos4_l2x0_cache_init(void)
{
int ret;
if (soc_is_exynos5250())
return 0;
ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
if (!ret) {
l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
return 0;
}
if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) {
l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC;
/* TAG, Data Latency Control: 2 cycles */
l2x0_saved_regs.tag_latency = 0x110;
if (soc_is_exynos4212() || soc_is_exynos4412())
l2x0_saved_regs.data_latency = 0x120;
else
l2x0_saved_regs.data_latency = 0x110;
l2x0_saved_regs.prefetch_ctrl = 0x30000007;
l2x0_saved_regs.pwr_ctrl =
(L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN);
l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
__raw_writel(l2x0_saved_regs.tag_latency,
S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
__raw_writel(l2x0_saved_regs.data_latency,
S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
/* L2X0 Prefetch Control */
__raw_writel(l2x0_saved_regs.prefetch_ctrl,
S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
/* L2X0 Power Control */
__raw_writel(l2x0_saved_regs.pwr_ctrl,
S5P_VA_L2CC + L2X0_POWER_CTRL);
clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs));
}
l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK);
return 0;
}
early_initcall(exynos4_l2x0_cache_init);
#endif
static int __init exynos5_l2_cache_init(void)
{
unsigned int val;
if (!soc_is_exynos5250())
return 0;
asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
"bic %0, %0, #(1 << 2)\n" /* cache disable */
"mcr p15, 0, %0, c1, c0, 0\n"
"mrc p15, 1, %0, c9, c0, 2\n"
: "=r"(val));
val |= (1 << 9) | (1 << 5) | (2 << 6) | (2 << 0);
asm volatile("mcr p15, 1, %0, c9, c0, 2\n" : : "r"(val));
asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
"orr %0, %0, #(1 << 2)\n" /* cache enable */
"mcr p15, 0, %0, c1, c0, 0\n"
: : "r"(val));
return 0;
}
early_initcall(exynos5_l2_cache_init);
static int __init exynos_init(void)
{
printk(KERN_INFO "EXYNOS: Initializing architecture\n");
return device_register(&exynos4_dev);
}
/* uart registration process */
static void __init exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
struct s3c2410_uartcfg *tcfg = cfg;
u32 ucnt;
for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
tcfg->has_fracval = 1;
if (soc_is_exynos5250())
s3c24xx_init_uartdevs("exynos4210-uart", exynos5_uart_resources, cfg, no);
else
s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no);
}
static void __iomem *exynos_eint_base;
static DEFINE_SPINLOCK(eint_lock);
static unsigned int eint0_15_data[16];
static inline int exynos4_irq_to_gpio(unsigned int irq)
{
if (irq < IRQ_EINT(0))
return -EINVAL;
irq -= IRQ_EINT(0);
if (irq < 8)
return EXYNOS4_GPX0(irq);
irq -= 8;
if (irq < 8)
return EXYNOS4_GPX1(irq);
irq -= 8;
if (irq < 8)
return EXYNOS4_GPX2(irq);
irq -= 8;
if (irq < 8)
return EXYNOS4_GPX3(irq);
return -EINVAL;
}
static inline int exynos5_irq_to_gpio(unsigned int irq)
{
if (irq < IRQ_EINT(0))
return -EINVAL;
irq -= IRQ_EINT(0);
if (irq < 8)
return EXYNOS5_GPX0(irq);
irq -= 8;
if (irq < 8)
return EXYNOS5_GPX1(irq);
irq -= 8;
if (irq < 8)
return EXYNOS5_GPX2(irq);
irq -= 8;
if (irq < 8)
return EXYNOS5_GPX3(irq);
return -EINVAL;
}
static unsigned int exynos4_eint0_15_src_int[16] = {
EXYNOS4_IRQ_EINT0,
EXYNOS4_IRQ_EINT1,
EXYNOS4_IRQ_EINT2,
EXYNOS4_IRQ_EINT3,
EXYNOS4_IRQ_EINT4,
EXYNOS4_IRQ_EINT5,
EXYNOS4_IRQ_EINT6,
EXYNOS4_IRQ_EINT7,
EXYNOS4_IRQ_EINT8,
EXYNOS4_IRQ_EINT9,
EXYNOS4_IRQ_EINT10,
EXYNOS4_IRQ_EINT11,
EXYNOS4_IRQ_EINT12,
EXYNOS4_IRQ_EINT13,
EXYNOS4_IRQ_EINT14,
EXYNOS4_IRQ_EINT15,
};
static unsigned int exynos5_eint0_15_src_int[16] = {
EXYNOS5_IRQ_EINT0,
EXYNOS5_IRQ_EINT1,
EXYNOS5_IRQ_EINT2,
EXYNOS5_IRQ_EINT3,
EXYNOS5_IRQ_EINT4,
EXYNOS5_IRQ_EINT5,
EXYNOS5_IRQ_EINT6,
EXYNOS5_IRQ_EINT7,
EXYNOS5_IRQ_EINT8,
EXYNOS5_IRQ_EINT9,
EXYNOS5_IRQ_EINT10,
EXYNOS5_IRQ_EINT11,
EXYNOS5_IRQ_EINT12,
EXYNOS5_IRQ_EINT13,
EXYNOS5_IRQ_EINT14,
EXYNOS5_IRQ_EINT15,
};
static inline void exynos_irq_eint_mask(struct irq_data *data)
{
u32 mask;
spin_lock(&eint_lock);
mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
mask |= EINT_OFFSET_BIT(data->irq);
__raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
spin_unlock(&eint_lock);
}
static void exynos_irq_eint_unmask(struct irq_data *data)
{
u32 mask;
spin_lock(&eint_lock);
mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
mask &= ~(EINT_OFFSET_BIT(data->irq));
__raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
spin_unlock(&eint_lock);
}
static inline void exynos_irq_eint_ack(struct irq_data *data)
{
__raw_writel(EINT_OFFSET_BIT(data->irq),
EINT_PEND(exynos_eint_base, data->irq));
}
static void exynos_irq_eint_maskack(struct irq_data *data)
{
exynos_irq_eint_mask(data);
exynos_irq_eint_ack(data);
}
static int exynos_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;
switch (type) {
case IRQ_TYPE_EDGE_RISING:
newvalue = S5P_IRQ_TYPE_EDGE_RISING;
break;
case IRQ_TYPE_EDGE_FALLING:
newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
break;
case IRQ_TYPE_EDGE_BOTH:
newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
break;
case IRQ_TYPE_LEVEL_LOW:
newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
break;
case IRQ_TYPE_LEVEL_HIGH:
newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
break;
default:
printk(KERN_ERR "No such irq type %d", type);
return -EINVAL;
}
shift = (offs & 0x7) * 4;
mask = 0x7 << shift;
spin_lock(&eint_lock);
ctrl = __raw_readl(EINT_CON(exynos_eint_base, data->irq));
ctrl &= ~mask;
ctrl |= newvalue << shift;
__raw_writel(ctrl, EINT_CON(exynos_eint_base, data->irq));
spin_unlock(&eint_lock);
if (soc_is_exynos5250())
s3c_gpio_cfgpin(exynos5_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
else
s3c_gpio_cfgpin(exynos4_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
return 0;
}
static struct irq_chip exynos_irq_eint = {
.name = "exynos-eint",
.irq_mask = exynos_irq_eint_mask,
.irq_unmask = exynos_irq_eint_unmask,
.irq_mask_ack = exynos_irq_eint_maskack,
.irq_ack = exynos_irq_eint_ack,
.irq_set_type = exynos_irq_eint_set_type,
#ifdef CONFIG_PM
.irq_set_wake = s3c_irqext_wake,
#endif
};
/*
* exynos4_irq_demux_eint
*
* This function demuxes the IRQ from from EINTs 16 to 31.
* It is designed to be inlined into the specific handler
* s5p_irq_demux_eintX_Y.
*
* Each EINT pend/mask registers handle eight of them.
*/
static inline void exynos_irq_demux_eint(unsigned int start)
{
unsigned int irq;
u32 status = __raw_readl(EINT_PEND(exynos_eint_base, start));
u32 mask = __raw_readl(EINT_MASK(exynos_eint_base, start));
status &= ~mask;
status &= 0xff;
while (status) {
irq = fls(status) - 1;
generic_handle_irq(irq + start);
status &= ~(1 << irq);
}
}
static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
{
struct irq_chip *chip = irq_get_chip(irq);
chained_irq_enter(chip, desc);
exynos_irq_demux_eint(IRQ_EINT(16));
exynos_irq_demux_eint(IRQ_EINT(24));
chained_irq_exit(chip, desc);
}
static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
{
u32 *irq_data = irq_get_handler_data(irq);
struct irq_chip *chip = irq_get_chip(irq);
chained_irq_enter(chip, desc);
chip->irq_mask(&desc->irq_data);
if (chip->irq_ack)
chip->irq_ack(&desc->irq_data);
generic_handle_irq(*irq_data);
chip->irq_unmask(&desc->irq_data);
chained_irq_exit(chip, desc);
}
static int __init exynos_init_irq_eint(void)
{
int irq;
if (soc_is_exynos5250())
exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
else
exynos_eint_base = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
if (exynos_eint_base == NULL) {
pr_err("unable to ioremap for EINT base address\n");
return -ENOMEM;
}
for (irq = 0 ; irq <= 31 ; irq++) {
irq_set_chip_and_handler(IRQ_EINT(irq), &exynos_irq_eint,
handle_level_irq);
set_irq_flags(IRQ_EINT(irq), IRQF_VALID);
}
irq_set_chained_handler(EXYNOS_IRQ_EINT16_31, exynos_irq_demux_eint16_31);
for (irq = 0 ; irq <= 15 ; irq++) {
eint0_15_data[irq] = IRQ_EINT(irq);
if (soc_is_exynos5250()) {
irq_set_handler_data(exynos5_eint0_15_src_int[irq],
&eint0_15_data[irq]);
irq_set_chained_handler(exynos5_eint0_15_src_int[irq],
exynos_irq_eint0_15);
} else {
irq_set_handler_data(exynos4_eint0_15_src_int[irq],
&eint0_15_data[irq]);
irq_set_chained_handler(exynos4_eint0_15_src_int[irq],
exynos_irq_eint0_15);
}
}
return 0;
}
arch_initcall(exynos_init_irq_eint);
Reference in New Issue View Git Blame Copy Permalink