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[ARM] 5374/1: The w90p910 uart0 driver patch

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Add W90P910 UART0 support,the W90P910 UART0 is 8250 series.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
wanzongshun 2009-02-04 05:01:38 +01:00 committed by Russell King
parent b74788d8c1
commit 17198f2d68
3 changed files with 23 additions and 69 deletions
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17
arch/arm/mach-w90x900/cpu.h
View file

@ -43,6 +43,7 @@ extern void w90p910_init_io(struct map_desc *mach_desc, int size);
extern void w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no);
extern void w90p910_init_clocks(int xtal);
extern void w90p910_map_io(struct map_desc *mach_desc, int size);
extern struct platform_device w90p910_serial_device;
extern struct sys_timer w90x900_timer;
#define W90X900_RES(name) \
@ -67,11 +68,13 @@ struct platform_device w90x900_##devname = { \
.resource = w90x900_##regname##_resource, \
}
#define W90X900_UARTCFG(port, flag, uc, ulc, ufc) \
{ \
.hwport = port, \
.flags = flag, \
.ucon = uc, \
.ulcon = ulc, \
.ufcon = ufc, \
#define W90X900_8250PORT(name) \
{ \
.membase = name##_BA, \
.mapbase = name##_PA, \
.irq = IRQ_##name, \
.uartclk = 11313600, \
.regshift = 2, \
.iotype = UPIO_MEM, \
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
}

10
arch/arm/mach-w90x900/mach-w90p910evb.c
View file

@ -36,24 +36,16 @@
static struct map_desc w90p910_iodesc[] __initdata = {
};
static struct w90x900_uartcfg w90p910_uartcfgs[] = {
W90X900_UARTCFG(0, 0, 0, 0, 0),
W90X900_UARTCFG(1, 0, 0, 0, 0),
W90X900_UARTCFG(2, 0, 0, 0, 0),
W90X900_UARTCFG(3, 0, 0, 0, 0),
W90X900_UARTCFG(4, 0, 0, 0, 0),
};
/*Here should be your evb resourse,such as LCD*/
static struct platform_device *w90p910evb_dev[] __initdata = {
&w90p910_serial_device,
};
static void __init w90p910evb_map_io(void)
{
w90p910_map_io(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
w90p910_init_clocks(0);
w90p910_init_uarts(w90p910_uartcfgs, ARRAY_SIZE(w90p910_uartcfgs));
}
static void __init w90p910evb_init(void)

65
arch/arm/mach-w90x900/w90p910.c
View file

@ -25,6 +25,7 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/serial_8250.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@ -36,12 +37,6 @@
#include "cpu.h"
/*W90P910 has five uarts*/
#define MAX_UART_COUNT 5
static int uart_count;
static struct platform_device *uart_devs[MAX_UART_COUNT-1];
/* Initial IO mappings */
static struct map_desc w90p910_iodesc[] __initdata = {
@ -53,48 +48,19 @@ static struct map_desc w90p910_iodesc[] __initdata = {
/*IODESC_ENT(LCD),*/
};
/*Init the dev resource*/
/* Initial serial platform data */
static W90X900_RES(UART0);
static W90X900_RES(UART1);
static W90X900_RES(UART2);
static W90X900_RES(UART3);
static W90X900_RES(UART4);
static W90X900_DEVICE(uart0, UART0, 0, "w90x900-uart");
static W90X900_DEVICE(uart1, UART1, 1, "w90x900-uart");
static W90X900_DEVICE(uart2, UART2, 2, "w90x900-uart");
static W90X900_DEVICE(uart3, UART3, 3, "w90x900-uart");
static W90X900_DEVICE(uart4, UART4, 4, "w90x900-uart");
static struct platform_device *uart_devices[] __initdata = {
&w90x900_uart0,
&w90x900_uart1,
&w90x900_uart2,
&w90x900_uart3,
&w90x900_uart4
struct plat_serial8250_port w90p910_uart_data[] = {
W90X900_8250PORT(UART0),
};
/*Init W90P910 uart device*/
void __init w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no)
{
struct platform_device *platdev;
int uart, uartdev;
/*By min() to judge count of uart be used indeed*/
uartdev = ARRAY_SIZE(uart_devices);
no = min(uartdev, no);
for (uart = 0; uart < no; uart++, cfg++) {
if (cfg->hwport != uart)
printk(KERN_ERR "w90x900_uartcfg[%d] error\n", uart);
platdev = uart_devices[cfg->hwport];
uart_devs[uart] = platdev;
platdev->dev.platform_data = cfg;
}
uart_count = uart;
}
struct platform_device w90p910_serial_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = w90p910_uart_data,
},
};
/*Init W90P910 evb io*/
@ -122,13 +88,6 @@ static int __init w90p910_init_cpu(void)
static int __init w90x900_arch_init(void)
{
int ret;
ret = w90p910_init_cpu();
if (ret != 0)
return ret;
return platform_add_devices(uart_devs, uart_count);
return w90p910_init_cpu();
}
arch_initcall(w90x900_arch_init);