ARM: 7245/1: S3C64XX: introduce arch/arm/mach-s3c64xx/common.[ch]
This patch introduces common.[ch] which are used only in the
arch/arm/mach-s3c64xx/ directory. The common.c file merges
the cpu.c, irq.c and irq-eint.c which are used commonly on
S3C64XX SoCs and the common.h file replaces with plat/s3c6400.h
and plat/s3c6410.h files.
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-s3c64xx/common.c b/arch/arm/mach-s3c64xx/common.c
new file mode 100644
index 0000000..8ae5b16
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/common.c
@@ -0,0 +1,375 @@
+/*
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * Common Codes for S3C64XX 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/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/sysdev.h>
+#include <linux/serial_core.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/hardware/vic.h>
+
+#include <mach/map.h>
+#include <mach/hardware.h>
+#include <mach/regs-gpio.h>
+
+#include <plat/cpu.h>
+#include <plat/clock.h>
+#include <plat/devs.h>
+#include <plat/pm.h>
+#include <plat/gpio-cfg.h>
+#include <plat/irq-uart.h>
+#include <plat/irq-vic-timer.h>
+#include <plat/regs-irqtype.h>
+#include <plat/regs-serial.h>
+
+#include "common.h"
+
+/* uart registration process */
+
+void __init s3c64xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+ s3c24xx_init_uartdevs("s3c6400-uart", s3c64xx_uart_resources, cfg, no);
+}
+
+/* table of supported CPUs */
+
+static const char name_s3c6400[] = "S3C6400";
+static const char name_s3c6410[] = "S3C6410";
+
+static struct cpu_table cpu_ids[] __initdata = {
+ {
+ .idcode = S3C6400_CPU_ID,
+ .idmask = S3C64XX_CPU_MASK,
+ .map_io = s3c6400_map_io,
+ .init_clocks = s3c6400_init_clocks,
+ .init_uarts = s3c64xx_init_uarts,
+ .init = s3c6400_init,
+ .name = name_s3c6400,
+ }, {
+ .idcode = S3C6410_CPU_ID,
+ .idmask = S3C64XX_CPU_MASK,
+ .map_io = s3c6410_map_io,
+ .init_clocks = s3c6410_init_clocks,
+ .init_uarts = s3c64xx_init_uarts,
+ .init = s3c6410_init,
+ .name = name_s3c6410,
+ },
+};
+
+/* minimal IO mapping */
+
+/* see notes on uart map in arch/arm/mach-s3c64xx/include/mach/debug-macro.S */
+#define UART_OFFS (S3C_PA_UART & 0xfffff)
+
+static struct map_desc s3c_iodesc[] __initdata = {
+ {
+ .virtual = (unsigned long)S3C_VA_SYS,
+ .pfn = __phys_to_pfn(S3C64XX_PA_SYSCON),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S3C_VA_MEM,
+ .pfn = __phys_to_pfn(S3C64XX_PA_SROM),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)(S3C_VA_UART + UART_OFFS),
+ .pfn = __phys_to_pfn(S3C_PA_UART),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)VA_VIC0,
+ .pfn = __phys_to_pfn(S3C64XX_PA_VIC0),
+ .length = SZ_16K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)VA_VIC1,
+ .pfn = __phys_to_pfn(S3C64XX_PA_VIC1),
+ .length = SZ_16K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S3C_VA_TIMER,
+ .pfn = __phys_to_pfn(S3C_PA_TIMER),
+ .length = SZ_16K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S3C64XX_VA_GPIO,
+ .pfn = __phys_to_pfn(S3C64XX_PA_GPIO),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S3C64XX_VA_MODEM,
+ .pfn = __phys_to_pfn(S3C64XX_PA_MODEM),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S3C_VA_WATCHDOG,
+ .pfn = __phys_to_pfn(S3C64XX_PA_WATCHDOG),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S3C_VA_USB_HSPHY,
+ .pfn = __phys_to_pfn(S3C64XX_PA_USB_HSPHY),
+ .length = SZ_1K,
+ .type = MT_DEVICE,
+ },
+};
+
+struct sysdev_class s3c64xx_sysclass = {
+ .name = "s3c64xx-core",
+};
+
+static struct sys_device s3c64xx_sysdev = {
+ .cls = &s3c64xx_sysclass,
+};
+
+/* read cpu identification code */
+
+void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
+{
+ /* initialise the io descriptors we need for initialisation */
+ iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
+ iotable_init(mach_desc, size);
+ init_consistent_dma_size(SZ_8M);
+
+ /* detect cpu id */
+ s3c64xx_init_cpu();
+
+ s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+}
+
+static __init int s3c64xx_sysdev_init(void)
+{
+ sysdev_class_register(&s3c64xx_sysclass);
+ return sysdev_register(&s3c64xx_sysdev);
+}
+core_initcall(s3c64xx_sysdev_init);
+
+/*
+ * setup the sources the vic should advertise resume
+ * for, even though it is not doing the wake
+ * (set_irq_wake needs to be valid)
+ */
+#define IRQ_VIC0_RESUME (1 << (IRQ_RTC_TIC - IRQ_VIC0_BASE))
+#define IRQ_VIC1_RESUME (1 << (IRQ_RTC_ALARM - IRQ_VIC1_BASE) | \
+ 1 << (IRQ_PENDN - IRQ_VIC1_BASE) | \
+ 1 << (IRQ_HSMMC0 - IRQ_VIC1_BASE) | \
+ 1 << (IRQ_HSMMC1 - IRQ_VIC1_BASE) | \
+ 1 << (IRQ_HSMMC2 - IRQ_VIC1_BASE))
+
+void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid)
+{
+ printk(KERN_DEBUG "%s: initialising interrupts\n", __func__);
+
+ /* initialise the pair of VICs */
+ vic_init(VA_VIC0, IRQ_VIC0_BASE, vic0_valid, IRQ_VIC0_RESUME);
+ vic_init(VA_VIC1, IRQ_VIC1_BASE, vic1_valid, IRQ_VIC1_RESUME);
+
+ /* add the timer sub-irqs */
+ s3c_init_vic_timer_irq(5, IRQ_TIMER0);
+}
+
+#define eint_offset(irq) ((irq) - IRQ_EINT(0))
+#define eint_irq_to_bit(irq) ((u32)(1 << eint_offset(irq)))
+
+static inline void s3c_irq_eint_mask(struct irq_data *data)
+{
+ u32 mask;
+
+ mask = __raw_readl(S3C64XX_EINT0MASK);
+ mask |= (u32)data->chip_data;
+ __raw_writel(mask, S3C64XX_EINT0MASK);
+}
+
+static void s3c_irq_eint_unmask(struct irq_data *data)
+{
+ u32 mask;
+
+ mask = __raw_readl(S3C64XX_EINT0MASK);
+ mask &= ~((u32)data->chip_data);
+ __raw_writel(mask, S3C64XX_EINT0MASK);
+}
+
+static inline void s3c_irq_eint_ack(struct irq_data *data)
+{
+ __raw_writel((u32)data->chip_data, S3C64XX_EINT0PEND);
+}
+
+static void s3c_irq_eint_maskack(struct irq_data *data)
+{
+ /* compiler should in-line these */
+ s3c_irq_eint_mask(data);
+ s3c_irq_eint_ack(data);
+}
+
+static int s3c_irq_eint_set_type(struct irq_data *data, unsigned int type)
+{
+ int offs = eint_offset(data->irq);
+ int pin, pin_val;
+ int shift;
+ u32 ctrl, mask;
+ u32 newvalue = 0;
+ void __iomem *reg;
+
+ if (offs > 27)
+ return -EINVAL;
+
+ if (offs <= 15)
+ reg = S3C64XX_EINT0CON0;
+ else
+ reg = S3C64XX_EINT0CON1;
+
+ 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 -1;
+ }
+
+ if (offs <= 15)
+ shift = (offs / 2) * 4;
+ else
+ shift = ((offs - 16) / 2) * 4;
+ mask = 0x7 << shift;
+
+ ctrl = __raw_readl(reg);
+ ctrl &= ~mask;
+ ctrl |= newvalue << shift;
+ __raw_writel(ctrl, reg);
+
+ /* set the GPIO pin appropriately */
+
+ if (offs < 16) {
+ pin = S3C64XX_GPN(offs);
+ pin_val = S3C_GPIO_SFN(2);
+ } else if (offs < 23) {
+ pin = S3C64XX_GPL(offs + 8 - 16);
+ pin_val = S3C_GPIO_SFN(3);
+ } else {
+ pin = S3C64XX_GPM(offs - 23);
+ pin_val = S3C_GPIO_SFN(3);
+ }
+
+ s3c_gpio_cfgpin(pin, pin_val);
+
+ return 0;
+}
+
+static struct irq_chip s3c_irq_eint = {
+ .name = "s3c-eint",
+ .irq_mask = s3c_irq_eint_mask,
+ .irq_unmask = s3c_irq_eint_unmask,
+ .irq_mask_ack = s3c_irq_eint_maskack,
+ .irq_ack = s3c_irq_eint_ack,
+ .irq_set_type = s3c_irq_eint_set_type,
+ .irq_set_wake = s3c_irqext_wake,
+};
+
+/* s3c_irq_demux_eint
+ *
+ * This function demuxes the IRQ from the group0 external interrupts,
+ * from IRQ_EINT(0) to IRQ_EINT(27). It is designed to be inlined into
+ * the specific handlers s3c_irq_demux_eintX_Y.
+ */
+static inline void s3c_irq_demux_eint(unsigned int start, unsigned int end)
+{
+ u32 status = __raw_readl(S3C64XX_EINT0PEND);
+ u32 mask = __raw_readl(S3C64XX_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 s3c_irq_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
+{
+ s3c_irq_demux_eint(0, 3);
+}
+
+static void s3c_irq_demux_eint4_11(unsigned int irq, struct irq_desc *desc)
+{
+ s3c_irq_demux_eint(4, 11);
+}
+
+static void s3c_irq_demux_eint12_19(unsigned int irq, struct irq_desc *desc)
+{
+ s3c_irq_demux_eint(12, 19);
+}
+
+static void s3c_irq_demux_eint20_27(unsigned int irq, struct irq_desc *desc)
+{
+ s3c_irq_demux_eint(20, 27);
+}
+
+static int __init s3c64xx_init_irq_eint(void)
+{
+ int irq;
+
+ for (irq = IRQ_EINT(0); irq <= IRQ_EINT(27); irq++) {
+ irq_set_chip_and_handler(irq, &s3c_irq_eint, handle_level_irq);
+ irq_set_chip_data(irq, (void *)eint_irq_to_bit(irq));
+ set_irq_flags(irq, IRQF_VALID);
+ }
+
+ irq_set_chained_handler(IRQ_EINT0_3, s3c_irq_demux_eint0_3);
+ irq_set_chained_handler(IRQ_EINT4_11, s3c_irq_demux_eint4_11);
+ irq_set_chained_handler(IRQ_EINT12_19, s3c_irq_demux_eint12_19);
+ irq_set_chained_handler(IRQ_EINT20_27, s3c_irq_demux_eint20_27);
+
+ return 0;
+}
+arch_initcall(s3c64xx_init_irq_eint);