You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
200 lines
4.6 KiB
200 lines
4.6 KiB
/* linux/arch/arm/mach-s3c2410/s3c2410.c
|
|
*
|
|
* Copyright (c) 2003-2005 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* http://www.simtec.co.uk/products/EB2410ITX/
|
|
*
|
|
* 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.
|
|
*
|
|
* Modifications:
|
|
* 16-May-2003 BJD Created initial version
|
|
* 16-Aug-2003 BJD Fixed header files and copyright, added URL
|
|
* 05-Sep-2003 BJD Moved to kernel v2.6
|
|
* 18-Jan-2004 BJD Added serial port configuration
|
|
* 21-Aug-2004 BJD Added new struct s3c2410_board handler
|
|
* 28-Sep-2004 BJD Updates for new serial port bits
|
|
* 04-Nov-2004 BJD Updated UART configuration process
|
|
* 10-Jan-2005 BJD Removed s3c2410_clock_tick_rate
|
|
* 13-Aug-2005 DA Removed UART from initial I/O mappings
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include <asm/arch/regs-clock.h>
|
|
#include <asm/arch/regs-serial.h>
|
|
|
|
#include "s3c2410.h"
|
|
#include "cpu.h"
|
|
#include "clock.h"
|
|
|
|
/* Initial IO mappings */
|
|
|
|
static struct map_desc s3c2410_iodesc[] __initdata = {
|
|
IODESC_ENT(USBHOST),
|
|
IODESC_ENT(CLKPWR),
|
|
IODESC_ENT(LCD),
|
|
IODESC_ENT(TIMER),
|
|
IODESC_ENT(ADC),
|
|
IODESC_ENT(WATCHDOG),
|
|
};
|
|
|
|
static struct resource s3c_uart0_resource[] = {
|
|
[0] = {
|
|
.start = S3C2410_PA_UART0,
|
|
.end = S3C2410_PA_UART0 + 0x3fff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = IRQ_S3CUART_RX0,
|
|
.end = IRQ_S3CUART_ERR0,
|
|
.flags = IORESOURCE_IRQ,
|
|
}
|
|
|
|
};
|
|
|
|
static struct resource s3c_uart1_resource[] = {
|
|
[0] = {
|
|
.start = S3C2410_PA_UART1,
|
|
.end = S3C2410_PA_UART1 + 0x3fff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = IRQ_S3CUART_RX1,
|
|
.end = IRQ_S3CUART_ERR1,
|
|
.flags = IORESOURCE_IRQ,
|
|
}
|
|
};
|
|
|
|
static struct resource s3c_uart2_resource[] = {
|
|
[0] = {
|
|
.start = S3C2410_PA_UART2,
|
|
.end = S3C2410_PA_UART2 + 0x3fff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = IRQ_S3CUART_RX2,
|
|
.end = IRQ_S3CUART_ERR2,
|
|
.flags = IORESOURCE_IRQ,
|
|
}
|
|
};
|
|
|
|
/* our uart devices */
|
|
|
|
static struct platform_device s3c_uart0 = {
|
|
.name = "s3c2410-uart",
|
|
.id = 0,
|
|
.num_resources = ARRAY_SIZE(s3c_uart0_resource),
|
|
.resource = s3c_uart0_resource,
|
|
};
|
|
|
|
|
|
static struct platform_device s3c_uart1 = {
|
|
.name = "s3c2410-uart",
|
|
.id = 1,
|
|
.num_resources = ARRAY_SIZE(s3c_uart1_resource),
|
|
.resource = s3c_uart1_resource,
|
|
};
|
|
|
|
static struct platform_device s3c_uart2 = {
|
|
.name = "s3c2410-uart",
|
|
.id = 2,
|
|
.num_resources = ARRAY_SIZE(s3c_uart2_resource),
|
|
.resource = s3c_uart2_resource,
|
|
};
|
|
|
|
static struct platform_device *uart_devices[] __initdata = {
|
|
&s3c_uart0,
|
|
&s3c_uart1,
|
|
&s3c_uart2
|
|
};
|
|
|
|
/* store our uart devices for the serial driver console */
|
|
struct platform_device *s3c2410_uart_devices[3];
|
|
|
|
static int s3c2410_uart_count = 0;
|
|
|
|
/* uart registration process */
|
|
|
|
void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
|
|
{
|
|
struct platform_device *platdev;
|
|
int uart;
|
|
|
|
for (uart = 0; uart < no; uart++, cfg++) {
|
|
platdev = uart_devices[cfg->hwport];
|
|
|
|
s3c24xx_uart_devs[uart] = platdev;
|
|
platdev->dev.platform_data = cfg;
|
|
}
|
|
|
|
s3c2410_uart_count = uart;
|
|
}
|
|
|
|
/* s3c2410_map_io
|
|
*
|
|
* register the standard cpu IO areas, and any passed in from the
|
|
* machine specific initialisation.
|
|
*/
|
|
|
|
void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size)
|
|
{
|
|
/* register our io-tables */
|
|
|
|
iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
|
|
iotable_init(mach_desc, mach_size);
|
|
}
|
|
|
|
void __init s3c2410_init_clocks(int xtal)
|
|
{
|
|
unsigned long tmp;
|
|
unsigned long fclk;
|
|
unsigned long hclk;
|
|
unsigned long pclk;
|
|
|
|
/* now we've got our machine bits initialised, work out what
|
|
* clocks we've got */
|
|
|
|
fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
|
|
|
|
tmp = __raw_readl(S3C2410_CLKDIVN);
|
|
|
|
/* work out clock scalings */
|
|
|
|
hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
|
|
pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
|
|
|
|
/* print brieft summary of clocks, etc */
|
|
|
|
printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
|
|
print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
|
|
|
|
/* initialise the clocks here, to allow other things like the
|
|
* console to use them
|
|
*/
|
|
|
|
s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
|
|
}
|
|
|
|
int __init s3c2410_init(void)
|
|
{
|
|
printk("S3C2410: Initialising architecture\n");
|
|
|
|
return platform_add_devices(s3c24xx_uart_devs, s3c2410_uart_count);
|
|
}
|
|
|