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ARM: EXYNOS: add support uart for EXYNOS4 and EXYNOS5 

Actually, the base address of uart is different between EXYNOS4
and EXYNOS5 and this patch enables to support uart for EXYNOS4
and EXYNOS5 SoCs at runtime.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Kukjin Kim 2012-02-10 11:57:53 +09:00
parent b67545fd9b
commit 171c067c1a
11 changed files with 136 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-exynos/Makefile
View File

@ -44,6 +44,7 @@ obj-$(CONFIG_MACH_EXYNOS4_DT) += mach-exynos4-dt.o
# device support
obj-y += dev-uart.o
obj-$(CONFIG_ARCH_EXYNOS4) += dev-audio.o
obj-$(CONFIG_EXYNOS4_DEV_AHCI) += dev-ahci.o
obj-$(CONFIG_EXYNOS4_DEV_PD) += dev-pd.o

5
arch/arm/mach-exynos/common.c
View File

@ -477,7 +477,10 @@ static void __init exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no)
for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
tcfg->has_fracval = 1;
s3c24xx_init_uartdevs("exynos4210-uart", s5p_uart_resources, cfg, no);
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 DEFINE_SPINLOCK(eint_lock);

78
arch/arm/mach-exynos/dev-uart.c Normal file
View File

@ -0,0 +1,78 @@
/*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Base EXYNOS UART resource and device definitions
*
* 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/ioport.h>
#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <mach/hardware.h>
#include <mach/map.h>
#include <plat/devs.h>
#define EXYNOS_UART_RESOURCE(_series, _nr) \
static struct resource exynos##_series##_uart##_nr##_resource[] = { \
[0] = DEFINE_RES_MEM(EXYNOS##_series##_PA_UART##_nr, EXYNOS##_series##_SZ_UART), \
[1] = DEFINE_RES_IRQ(EXYNOS##_series##_IRQ_UART##_nr), \
};
EXYNOS_UART_RESOURCE(4, 0)
EXYNOS_UART_RESOURCE(4, 1)
EXYNOS_UART_RESOURCE(4, 2)
EXYNOS_UART_RESOURCE(4, 3)
struct s3c24xx_uart_resources exynos4_uart_resources[] __initdata = {
[0] = {
.resources = exynos4_uart0_resource,
.nr_resources = ARRAY_SIZE(exynos4_uart0_resource),
},
[1] = {
.resources = exynos4_uart1_resource,
.nr_resources = ARRAY_SIZE(exynos4_uart1_resource),
},
[2] = {
.resources = exynos4_uart2_resource,
.nr_resources = ARRAY_SIZE(exynos4_uart2_resource),
},
[3] = {
.resources = exynos4_uart3_resource,
.nr_resources = ARRAY_SIZE(exynos4_uart3_resource),
},
};
EXYNOS_UART_RESOURCE(5, 0)
EXYNOS_UART_RESOURCE(5, 1)
EXYNOS_UART_RESOURCE(5, 2)
EXYNOS_UART_RESOURCE(5, 3)
struct s3c24xx_uart_resources exynos5_uart_resources[] __initdata = {
[0] = {
.resources = exynos5_uart0_resource,
.nr_resources = ARRAY_SIZE(exynos5_uart0_resource),
},
[1] = {
.resources = exynos5_uart1_resource,
.nr_resources = ARRAY_SIZE(exynos5_uart0_resource),
},
[2] = {
.resources = exynos5_uart2_resource,
.nr_resources = ARRAY_SIZE(exynos5_uart2_resource),
},
[3] = {
.resources = exynos5_uart3_resource,
.nr_resources = ARRAY_SIZE(exynos5_uart3_resource),
},
};

9
arch/arm/mach-exynos/include/mach/debug-macro.S
View File

@ -21,8 +21,13 @@
*/
.macro addruart, rp, rv, tmp
ldr \rp, = S3C_PA_UART
ldr \rv, = S3C_VA_UART
mov \rp, #0x10000000
ldr \rp, [\rp, #0x0]
and \rp, \rp, #0xf00000
teq \rp, #0x500000 @@ EXYNOS5
ldreq \rp, =EXYNOS5_PA_UART
movne \rp, #EXYNOS4_PA_UART @@ EXYNOS4
ldr \rv, =S3C_VA_UART
#if CONFIG_DEBUG_S3C_UART != 0
add \rp, \rp, #(0x10000 * CONFIG_DEBUG_S3C_UART)
add \rv, \rv, #(0x10000 * CONFIG_DEBUG_S3C_UART)

12
arch/arm/mach-exynos/include/mach/irqs.h
View File

@ -173,4 +173,16 @@
/* Set the default NR_IRQS */
#define NR_IRQS (IRQ_TIMER_BASE + IRQ_TIMER_COUNT)
#define EXYNOS4_IRQ_UART0 IRQ_SPI(52)
#define EXYNOS4_IRQ_UART1 IRQ_SPI(53)
#define EXYNOS4_IRQ_UART2 IRQ_SPI(54)
#define EXYNOS4_IRQ_UART3 IRQ_SPI(55)
#define EXYNOS4_IRQ_UART4 IRQ_SPI(56)
#define EXYNOS5_IRQ_UART0 IRQ_SPI(51)
#define EXYNOS5_IRQ_UART1 IRQ_SPI(52)
#define EXYNOS5_IRQ_UART2 IRQ_SPI(53)
#define EXYNOS5_IRQ_UART3 IRQ_SPI(54)
#define EXYNOS5_IRQ_UART4 IRQ_SPI(55)
#endif /* __ASM_ARCH_IRQS_H */

22
arch/arm/mach-exynos/include/mach/map.h
View File

@ -153,7 +153,6 @@
#define S3C_PA_IIC7 EXYNOS4_PA_IIC(7)
#define S3C_PA_RTC EXYNOS4_PA_RTC
#define S3C_PA_WDT EXYNOS4_PA_WATCHDOG
#define S3C_PA_UART EXYNOS4_PA_UART
#define S3C_PA_SPI0 EXYNOS4_PA_SPI0
#define S3C_PA_SPI1 EXYNOS4_PA_SPI1
#define S3C_PA_SPI2 EXYNOS4_PA_SPI2
@ -182,15 +181,18 @@
/* Compatibility UART */
#define EXYNOS4_PA_UART0 0x13800000
#define EXYNOS4_PA_UART1 0x13810000
#define EXYNOS4_PA_UART2 0x13820000
#define EXYNOS4_PA_UART3 0x13830000
#define EXYNOS4_SZ_UART SZ_256
#define EXYNOS5_PA_UART0 0x12C00000
#define EXYNOS5_PA_UART1 0x12C10000
#define EXYNOS5_PA_UART2 0x12C20000
#define EXYNOS5_PA_UART3 0x12C30000
#define EXYNOS5_SZ_UART SZ_256
#define S3C_VA_UARTx(x) (S3C_VA_UART + ((x) * S3C_UART_OFFSET))
#define S5P_PA_UART(x) (EXYNOS4_PA_UART + ((x) * S3C_UART_OFFSET))
#define S5P_PA_UART0 S5P_PA_UART(0)
#define S5P_PA_UART1 S5P_PA_UART(1)
#define S5P_PA_UART2 S5P_PA_UART(2)
#define S5P_PA_UART3 S5P_PA_UART(3)
#define S5P_PA_UART4 S5P_PA_UART(4)
#define S5P_SZ_UART SZ_256
#endif /* __ASM_ARCH_MAP_H */

17
arch/arm/mach-exynos/include/mach/uncompress.h
View File

@ -1,9 +1,8 @@
/* linux/arch/arm/mach-exynos4/include/mach/uncompress.h
*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
/*
* Copyright (c) 2010-2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* EXYNOS4 - uncompress code
* EXYNOS - uncompress code
*
* 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
@ -13,12 +12,20 @@
#ifndef __ASM_ARCH_UNCOMPRESS_H
#define __ASM_ARCH_UNCOMPRESS_H __FILE__
#include <asm/mach-types.h>
#include <mach/map.h>
volatile u8 *uart_base;
#include <plat/uncompress.h>
static void arch_detect_cpu(void)
{
/* we do not need to do any cpu detection here at the moment. */
if (machine_is_smdk5250())
uart_base = (volatile u8 *)EXYNOS5_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
else
uart_base = (volatile u8 *)EXYNOS4_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
/*
* For preventing FIFO overrun or infinite loop of UART console,

4
arch/arm/plat-s5p/Kconfig
View File

@ -40,6 +40,10 @@ config S5P_HRT
help
Use the High Resolution timer support
config S5P_DEV_UART
def_bool y
depends on (ARCH_S5P64X0 || ARCH_S5PC100 || ARCH_S5PV210)
config S5P_PM
bool
help

3
arch/arm/plat-s5p/Makefile
View File

@ -12,7 +12,6 @@ obj- :=
# Core files
obj-y += dev-uart.o
obj-y += clock.o
obj-y += irq.o
obj-$(CONFIG_S5P_EXT_INT) += irq-eint.o
@ -23,5 +22,7 @@ obj-$(CONFIG_S5P_SLEEP) += sleep.o
obj-$(CONFIG_S5P_HRT) += s5p-time.o
# devices
obj-$(CONFIG_S5P_DEV_UART) += dev-uart.o
obj-$(CONFIG_S5P_DEV_MFC) += dev-mfc.o
obj-$(CONFIG_S5P_SETUP_MIPIPHY) += setup-mipiphy.o

2
arch/arm/plat-samsung/include/plat/devs.h
View File

@ -26,6 +26,8 @@ struct s3c24xx_uart_resources {
extern struct s3c24xx_uart_resources s3c2410_uart_resources[];
extern struct s3c24xx_uart_resources s3c64xx_uart_resources[];
extern struct s3c24xx_uart_resources s5p_uart_resources[];
extern struct s3c24xx_uart_resources exynos4_uart_resources[];
extern struct s3c24xx_uart_resources exynos5_uart_resources[];
extern struct platform_device *s3c24xx_uart_devs[];
extern struct platform_device *s3c24xx_uart_src[];

2
arch/arm/plat-samsung/include/plat/uncompress.h
View File

@ -37,7 +37,9 @@ static void arch_detect_cpu(void);
/* how many bytes we allow into the FIFO at a time in FIFO mode */
#define FIFO_MAX (14)
#ifdef S3C_PA_UART
#define uart_base S3C_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT)
#endif
static __inline__ void
uart_wr(unsigned int reg, unsigned int val)