| /* linux/arch/arm/plat-s3c24xx/s3c244x.c |
| * |
| * Copyright (c) 2004-2006 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443) |
| * |
| * 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/kernel.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/list.h> |
| #include <linux/timer.h> |
| #include <linux/init.h> |
| #include <linux/serial_core.h> |
| #include <linux/platform_device.h> |
| #include <linux/sysdev.h> |
| #include <linux/clk.h> |
| #include <linux/io.h> |
| |
| #include <asm/mach/arch.h> |
| #include <asm/mach/map.h> |
| #include <asm/mach/irq.h> |
| |
| #include <mach/hardware.h> |
| #include <asm/irq.h> |
| |
| #include <plat/cpu-freq.h> |
| |
| #include <mach/regs-clock.h> |
| #include <plat/regs-serial.h> |
| #include <mach/regs-gpio.h> |
| #include <mach/regs-gpioj.h> |
| #include <mach/regs-dsc.h> |
| |
| #include <plat/s3c2410.h> |
| #include <plat/s3c2440.h> |
| #include "s3c244x.h" |
| #include <plat/clock.h> |
| #include <plat/devs.h> |
| #include <plat/cpu.h> |
| #include <plat/pm.h> |
| #include <plat/pll.h> |
| |
| static struct map_desc s3c244x_iodesc[] __initdata = { |
| IODESC_ENT(CLKPWR), |
| IODESC_ENT(TIMER), |
| IODESC_ENT(WATCHDOG), |
| }; |
| |
| /* uart initialisation */ |
| |
| void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no) |
| { |
| s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no); |
| } |
| |
| void __init s3c244x_map_io(void) |
| { |
| /* register our io-tables */ |
| |
| iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc)); |
| |
| /* rename any peripherals used differing from the s3c2410 */ |
| |
| s3c_device_sdi.name = "s3c2440-sdi"; |
| s3c_device_i2c0.name = "s3c2440-i2c"; |
| s3c_device_nand.name = "s3c2440-nand"; |
| s3c_device_ts.name = "s3c2440-ts"; |
| s3c_device_usbgadget.name = "s3c2440-usbgadget"; |
| } |
| |
| void __init_or_cpufreq s3c244x_setup_clocks(void) |
| { |
| struct clk *xtal_clk; |
| unsigned long clkdiv; |
| unsigned long camdiv; |
| unsigned long xtal; |
| unsigned long hclk, fclk, pclk; |
| int hdiv = 1; |
| |
| xtal_clk = clk_get(NULL, "xtal"); |
| xtal = clk_get_rate(xtal_clk); |
| clk_put(xtal_clk); |
| |
| fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2; |
| |
| clkdiv = __raw_readl(S3C2410_CLKDIVN); |
| camdiv = __raw_readl(S3C2440_CAMDIVN); |
| |
| /* work out clock scalings */ |
| |
| switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) { |
| case S3C2440_CLKDIVN_HDIVN_1: |
| hdiv = 1; |
| break; |
| |
| case S3C2440_CLKDIVN_HDIVN_2: |
| hdiv = 2; |
| break; |
| |
| case S3C2440_CLKDIVN_HDIVN_4_8: |
| hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4; |
| break; |
| |
| case S3C2440_CLKDIVN_HDIVN_3_6: |
| hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3; |
| break; |
| } |
| |
| hclk = fclk / hdiv; |
| pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1); |
| |
| /* print brief summary of clocks, etc */ |
| |
| printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", |
| print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); |
| |
| s3c24xx_setup_clocks(fclk, hclk, pclk); |
| } |
| |
| void __init s3c244x_init_clocks(int xtal) |
| { |
| /* initialise the clocks here, to allow other things like the |
| * console to use them, and to add new ones after the initialisation |
| */ |
| |
| s3c24xx_register_baseclocks(xtal); |
| s3c244x_setup_clocks(); |
| s3c2410_baseclk_add(); |
| } |
| |
| #ifdef CONFIG_PM |
| |
| static struct sleep_save s3c244x_sleep[] = { |
| SAVE_ITEM(S3C2440_DSC0), |
| SAVE_ITEM(S3C2440_DSC1), |
| SAVE_ITEM(S3C2440_GPJDAT), |
| SAVE_ITEM(S3C2440_GPJCON), |
| SAVE_ITEM(S3C2440_GPJUP) |
| }; |
| |
| static int s3c244x_suspend(struct sys_device *dev, pm_message_t state) |
| { |
| s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep)); |
| return 0; |
| } |
| |
| static int s3c244x_resume(struct sys_device *dev) |
| { |
| s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep)); |
| return 0; |
| } |
| |
| #else |
| #define s3c244x_suspend NULL |
| #define s3c244x_resume NULL |
| #endif |
| |
| /* Since the S3C2442 and S3C2440 share items, put both sysclasses here */ |
| |
| struct sysdev_class s3c2440_sysclass = { |
| .name = "s3c2440-core", |
| .suspend = s3c244x_suspend, |
| .resume = s3c244x_resume |
| }; |
| |
| struct sysdev_class s3c2442_sysclass = { |
| .name = "s3c2442-core", |
| .suspend = s3c244x_suspend, |
| .resume = s3c244x_resume |
| }; |
| |
| /* need to register class before we actually register the device, and |
| * we also need to ensure that it has been initialised before any of the |
| * drivers even try to use it (even if not on an s3c2440 based system) |
| * as a driver which may support both 2410 and 2440 may try and use it. |
| */ |
| |
| static int __init s3c2440_core_init(void) |
| { |
| return sysdev_class_register(&s3c2440_sysclass); |
| } |
| |
| core_initcall(s3c2440_core_init); |
| |
| static int __init s3c2442_core_init(void) |
| { |
| return sysdev_class_register(&s3c2442_sysclass); |
| } |
| |
| core_initcall(s3c2442_core_init); |