mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 20:42:39 +00:00
6a148eaa20
As per Russell King's last review comment, find and remove all unnecessary includes of <linux/delay.h> in the files that do not need them. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/* linux/arch/arm/plat-s3c/init.c
|
|
*
|
|
* Copyright (c) 2008 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
* http://armlinux.simtec.co.uk/
|
|
*
|
|
* S3C series CPU initialisation
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <mach/hardware.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/devs.h>
|
|
#include <plat/clock.h>
|
|
|
|
#include <plat/regs-serial.h>
|
|
|
|
static struct cpu_table *cpu;
|
|
|
|
static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode,
|
|
struct cpu_table *tab,
|
|
unsigned int count)
|
|
{
|
|
for (; count != 0; count--, tab++) {
|
|
if ((idcode & tab->idmask) == tab->idcode)
|
|
return tab;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void __init s3c_init_cpu(unsigned long idcode,
|
|
struct cpu_table *cputab, unsigned int cputab_size)
|
|
{
|
|
cpu = s3c_lookup_cpu(idcode, cputab, cputab_size);
|
|
|
|
if (cpu == NULL) {
|
|
printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode);
|
|
panic("Unknown S3C24XX CPU");
|
|
}
|
|
|
|
printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode);
|
|
|
|
if (cpu->map_io == NULL || cpu->init == NULL) {
|
|
printk(KERN_ERR "CPU %s support not enabled\n", cpu->name);
|
|
panic("Unsupported Samsung CPU");
|
|
}
|
|
|
|
cpu->map_io();
|
|
}
|
|
|
|
/* s3c24xx_init_clocks
|
|
*
|
|
* Initialise the clock subsystem and associated information from the
|
|
* given master crystal value.
|
|
*
|
|
* xtal = 0 -> use default PLL crystal value (normally 12MHz)
|
|
* != 0 -> PLL crystal value in Hz
|
|
*/
|
|
|
|
void __init s3c24xx_init_clocks(int xtal)
|
|
{
|
|
if (xtal == 0)
|
|
xtal = 12*1000*1000;
|
|
|
|
if (cpu == NULL)
|
|
panic("s3c24xx_init_clocks: no cpu setup?\n");
|
|
|
|
if (cpu->init_clocks == NULL)
|
|
panic("s3c24xx_init_clocks: cpu has no clock init\n");
|
|
else
|
|
(cpu->init_clocks)(xtal);
|
|
}
|
|
|
|
/* uart management */
|
|
|
|
static int nr_uarts __initdata = 0;
|
|
|
|
static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS];
|
|
|
|
/* s3c24xx_init_uartdevs
|
|
*
|
|
* copy the specified platform data and configuration into our central
|
|
* set of devices, before the data is thrown away after the init process.
|
|
*
|
|
* This also fills in the array passed to the serial driver for the
|
|
* early initialisation of the console.
|
|
*/
|
|
|
|
void __init s3c24xx_init_uartdevs(char *name,
|
|
struct s3c24xx_uart_resources *res,
|
|
struct s3c2410_uartcfg *cfg, int no)
|
|
{
|
|
struct platform_device *platdev;
|
|
struct s3c2410_uartcfg *cfgptr = uart_cfgs;
|
|
struct s3c24xx_uart_resources *resp;
|
|
int uart;
|
|
|
|
memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no);
|
|
|
|
for (uart = 0; uart < no; uart++, cfg++, cfgptr++) {
|
|
platdev = s3c24xx_uart_src[cfgptr->hwport];
|
|
|
|
resp = res + cfgptr->hwport;
|
|
|
|
s3c24xx_uart_devs[uart] = platdev;
|
|
|
|
platdev->name = name;
|
|
platdev->resource = resp->resources;
|
|
platdev->num_resources = resp->nr_resources;
|
|
|
|
platdev->dev.platform_data = cfgptr;
|
|
}
|
|
|
|
nr_uarts = no;
|
|
}
|
|
|
|
void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
|
|
{
|
|
if (cpu == NULL)
|
|
return;
|
|
|
|
if (cpu->init_uarts == NULL) {
|
|
printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
|
|
} else
|
|
(cpu->init_uarts)(cfg, no);
|
|
}
|
|
|
|
static int __init s3c_arch_init(void)
|
|
{
|
|
int ret;
|
|
|
|
// do the correct init for cpu
|
|
|
|
if (cpu == NULL)
|
|
panic("s3c_arch_init: NULL cpu\n");
|
|
|
|
ret = (cpu->init)();
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts);
|
|
return ret;
|
|
}
|
|
|
|
arch_initcall(s3c_arch_init);
|