66a9b49a37
Patch from Ben Dooks All the S3C24XX based devices currently have similar uart blocks, in the same location. Make the process of adding new uart blocks easier by commonising the device definitions and adding a new init function for the cpu code. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
193 lines
4.7 KiB
C
193 lines
4.7 KiB
C
/* linux/arch/arm/mach-s3c2410/s3c2440.c
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*
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* Copyright (c) 2004-2005 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* Samsung S3C2440 Mobile CPU support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Modifications:
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* 24-Aug-2004 BJD Start of s3c2440 support
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* 12-Oct-2004 BJD Moved clock info out to clock.c
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* 01-Nov-2004 BJD Fixed clock build code
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* 09-Nov-2004 BJD Added sysdev for power management
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* 04-Nov-2004 BJD New serial registration
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* 15-Nov-2004 BJD Rename the i2c device for the s3c2440
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* 14-Jan-2005 BJD Moved clock init code into seperate function
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* 14-Jan-2005 BJD Removed un-used clock bits
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/sysdev.h>
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#include <linux/clk.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/arch/regs-clock.h>
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#include <asm/arch/regs-serial.h>
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#include <asm/arch/regs-gpio.h>
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#include <asm/arch/regs-gpioj.h>
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#include <asm/arch/regs-dsc.h>
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#include "s3c2440.h"
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#include "clock.h"
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#include "devs.h"
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#include "cpu.h"
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#include "pm.h"
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static struct map_desc s3c2440_iodesc[] __initdata = {
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IODESC_ENT(USBHOST),
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IODESC_ENT(CLKPWR),
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IODESC_ENT(LCD),
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IODESC_ENT(TIMER),
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IODESC_ENT(ADC),
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IODESC_ENT(WATCHDOG),
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};
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/* uart initialisation */
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void __init s3c2440_init_uarts(struct s3c2410_uartcfg *cfg, int no)
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{
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s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
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}
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#ifdef CONFIG_PM
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static struct sleep_save s3c2440_sleep[] = {
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SAVE_ITEM(S3C2440_DSC0),
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SAVE_ITEM(S3C2440_DSC1),
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SAVE_ITEM(S3C2440_GPJDAT),
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SAVE_ITEM(S3C2440_GPJCON),
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SAVE_ITEM(S3C2440_GPJUP)
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};
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static int s3c2440_suspend(struct sys_device *dev, pm_message_t state)
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{
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s3c2410_pm_do_save(s3c2440_sleep, ARRAY_SIZE(s3c2440_sleep));
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return 0;
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}
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static int s3c2440_resume(struct sys_device *dev)
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{
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s3c2410_pm_do_restore(s3c2440_sleep, ARRAY_SIZE(s3c2440_sleep));
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return 0;
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}
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#else
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#define s3c2440_suspend NULL
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#define s3c2440_resume NULL
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#endif
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struct sysdev_class s3c2440_sysclass = {
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set_kset_name("s3c2440-core"),
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.suspend = s3c2440_suspend,
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.resume = s3c2440_resume
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};
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static struct sys_device s3c2440_sysdev = {
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.cls = &s3c2440_sysclass,
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};
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void __init s3c2440_map_io(struct map_desc *mach_desc, int size)
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{
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/* register our io-tables */
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iotable_init(s3c2440_iodesc, ARRAY_SIZE(s3c2440_iodesc));
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iotable_init(mach_desc, size);
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/* rename any peripherals used differing from the s3c2410 */
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s3c_device_i2c.name = "s3c2440-i2c";
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s3c_device_nand.name = "s3c2440-nand";
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/* change irq for watchdog */
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s3c_device_wdt.resource[1].start = IRQ_S3C2440_WDT;
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s3c_device_wdt.resource[1].end = IRQ_S3C2440_WDT;
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}
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void __init s3c2440_init_clocks(int xtal)
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{
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unsigned long clkdiv;
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unsigned long camdiv;
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unsigned long hclk, fclk, pclk;
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int hdiv = 1;
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/* now we've got our machine bits initialised, work out what
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* clocks we've got */
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fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
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clkdiv = __raw_readl(S3C2410_CLKDIVN);
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camdiv = __raw_readl(S3C2440_CAMDIVN);
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/* work out clock scalings */
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switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
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case S3C2440_CLKDIVN_HDIVN_1:
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hdiv = 1;
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break;
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case S3C2440_CLKDIVN_HDIVN_2:
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hdiv = 2;
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break;
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case S3C2440_CLKDIVN_HDIVN_4_8:
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hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
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break;
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case S3C2440_CLKDIVN_HDIVN_3_6:
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hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
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break;
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}
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hclk = fclk / hdiv;
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pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1);
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/* print brief summary of clocks, etc */
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printk("S3C2440: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
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print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
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/* initialise the clocks here, to allow other things like the
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* console to use them, and to add new ones after the initialisation
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*/
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s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
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}
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/* need to register class before we actually register the device, and
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* we also need to ensure that it has been initialised before any of the
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* drivers even try to use it (even if not on an s3c2440 based system)
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* as a driver which may support both 2410 and 2440 may try and use it.
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*/
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static int __init s3c2440_core_init(void)
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{
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return sysdev_class_register(&s3c2440_sysclass);
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}
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core_initcall(s3c2440_core_init);
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int __init s3c2440_init(void)
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{
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printk("S3C2440: Initialising architecture\n");
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return sysdev_register(&s3c2440_sysdev);
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}
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