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ARM: EXYNOS: add support uart for EXYNOS4 and EXYNOS5

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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
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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
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@ -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)