/* 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);
}
