a09e64fbc0
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
181 lines
4.2 KiB
C
181 lines
4.2 KiB
C
/*
|
|
* arch/arm/mach-omap2/serial.c
|
|
*
|
|
* OMAP2 serial support.
|
|
*
|
|
* Copyright (C) 2005 Nokia Corporation
|
|
* Author: Paul Mundt <paul.mundt@nokia.com>
|
|
*
|
|
* Based off of arch/arm/mach-omap/omap1/serial.c
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <linux/serial_reg.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#include <mach/common.h>
|
|
#include <mach/board.h>
|
|
|
|
static struct clk * uart1_ick = NULL;
|
|
static struct clk * uart1_fck = NULL;
|
|
static struct clk * uart2_ick = NULL;
|
|
static struct clk * uart2_fck = NULL;
|
|
static struct clk * uart3_ick = NULL;
|
|
static struct clk * uart3_fck = NULL;
|
|
|
|
static struct plat_serial8250_port serial_platform_data[] = {
|
|
{
|
|
.membase = (char *)IO_ADDRESS(OMAP_UART1_BASE),
|
|
.mapbase = (unsigned long)OMAP_UART1_BASE,
|
|
.irq = 72,
|
|
.flags = UPF_BOOT_AUTOCONF,
|
|
.iotype = UPIO_MEM,
|
|
.regshift = 2,
|
|
.uartclk = OMAP16XX_BASE_BAUD * 16,
|
|
}, {
|
|
.membase = (char *)IO_ADDRESS(OMAP_UART2_BASE),
|
|
.mapbase = (unsigned long)OMAP_UART2_BASE,
|
|
.irq = 73,
|
|
.flags = UPF_BOOT_AUTOCONF,
|
|
.iotype = UPIO_MEM,
|
|
.regshift = 2,
|
|
.uartclk = OMAP16XX_BASE_BAUD * 16,
|
|
}, {
|
|
.membase = (char *)IO_ADDRESS(OMAP_UART3_BASE),
|
|
.mapbase = (unsigned long)OMAP_UART3_BASE,
|
|
.irq = 74,
|
|
.flags = UPF_BOOT_AUTOCONF,
|
|
.iotype = UPIO_MEM,
|
|
.regshift = 2,
|
|
.uartclk = OMAP16XX_BASE_BAUD * 16,
|
|
}, {
|
|
.flags = 0
|
|
}
|
|
};
|
|
|
|
static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
|
|
int offset)
|
|
{
|
|
offset <<= up->regshift;
|
|
return (unsigned int)__raw_readb(up->membase + offset);
|
|
}
|
|
|
|
static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
|
|
int value)
|
|
{
|
|
offset <<= p->regshift;
|
|
__raw_writeb(value, (unsigned long)(p->membase + offset));
|
|
}
|
|
|
|
/*
|
|
* Internal UARTs need to be initialized for the 8250 autoconfig to work
|
|
* properly. Note that the TX watermark initialization may not be needed
|
|
* once the 8250.c watermark handling code is merged.
|
|
*/
|
|
static inline void __init omap_serial_reset(struct plat_serial8250_port *p)
|
|
{
|
|
serial_write_reg(p, UART_OMAP_MDR1, 0x07);
|
|
serial_write_reg(p, UART_OMAP_SCR, 0x08);
|
|
serial_write_reg(p, UART_OMAP_MDR1, 0x00);
|
|
serial_write_reg(p, UART_OMAP_SYSC, (0x02 << 3) | (1 << 2) | (1 << 0));
|
|
}
|
|
|
|
void __init omap_serial_init()
|
|
{
|
|
int i;
|
|
const struct omap_uart_config *info;
|
|
|
|
/*
|
|
* Make sure the serial ports are muxed on at this point.
|
|
* You have to mux them off in device drivers later on
|
|
* if not needed.
|
|
*/
|
|
|
|
info = omap_get_config(OMAP_TAG_UART,
|
|
struct omap_uart_config);
|
|
|
|
if (info == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
|
|
struct plat_serial8250_port *p = serial_platform_data + i;
|
|
|
|
if (!(info->enabled_uarts & (1 << i))) {
|
|
p->membase = 0;
|
|
p->mapbase = 0;
|
|
continue;
|
|
}
|
|
|
|
switch (i) {
|
|
case 0:
|
|
uart1_ick = clk_get(NULL, "uart1_ick");
|
|
if (IS_ERR(uart1_ick))
|
|
printk("Could not get uart1_ick\n");
|
|
else {
|
|
clk_enable(uart1_ick);
|
|
}
|
|
|
|
uart1_fck = clk_get(NULL, "uart1_fck");
|
|
if (IS_ERR(uart1_fck))
|
|
printk("Could not get uart1_fck\n");
|
|
else {
|
|
clk_enable(uart1_fck);
|
|
}
|
|
break;
|
|
case 1:
|
|
uart2_ick = clk_get(NULL, "uart2_ick");
|
|
if (IS_ERR(uart2_ick))
|
|
printk("Could not get uart2_ick\n");
|
|
else {
|
|
clk_enable(uart2_ick);
|
|
}
|
|
|
|
uart2_fck = clk_get(NULL, "uart2_fck");
|
|
if (IS_ERR(uart2_fck))
|
|
printk("Could not get uart2_fck\n");
|
|
else {
|
|
clk_enable(uart2_fck);
|
|
}
|
|
break;
|
|
case 2:
|
|
uart3_ick = clk_get(NULL, "uart3_ick");
|
|
if (IS_ERR(uart3_ick))
|
|
printk("Could not get uart3_ick\n");
|
|
else {
|
|
clk_enable(uart3_ick);
|
|
}
|
|
|
|
uart3_fck = clk_get(NULL, "uart3_fck");
|
|
if (IS_ERR(uart3_fck))
|
|
printk("Could not get uart3_fck\n");
|
|
else {
|
|
clk_enable(uart3_fck);
|
|
}
|
|
break;
|
|
}
|
|
|
|
omap_serial_reset(p);
|
|
}
|
|
}
|
|
|
|
static struct platform_device serial_device = {
|
|
.name = "serial8250",
|
|
.id = PLAT8250_DEV_PLATFORM,
|
|
.dev = {
|
|
.platform_data = serial_platform_data,
|
|
},
|
|
};
|
|
|
|
static int __init omap_init(void)
|
|
{
|
|
return platform_device_register(&serial_device);
|
|
}
|
|
arch_initcall(omap_init);
|