1 /* linux/arch/arm/mach-s3c2410/s3c244x.c
3 * Copyright (c) 2004-2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * Samsung S3C2440 and S3C2442 Mobile CPU support
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/list.h>
17 #include <linux/timer.h>
18 #include <linux/init.h>
19 #include <linux/platform_device.h>
20 #include <linux/sysdev.h>
21 #include <linux/clk.h>
23 #include <asm/mach/arch.h>
24 #include <asm/mach/map.h>
25 #include <asm/mach/irq.h>
27 #include <asm/hardware.h>
31 #include <asm/arch/regs-clock.h>
32 #include <asm/arch/regs-serial.h>
33 #include <asm/arch/regs-gpio.h>
34 #include <asm/arch/regs-gpioj.h>
35 #include <asm/arch/regs-dsc.h>
44 static struct map_desc s3c244x_iodesc[] __initdata = {
53 /* uart initialisation */
55 void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
57 s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
60 void __init s3c244x_map_io(struct map_desc *mach_desc, int size)
62 /* register our io-tables */
64 iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
65 iotable_init(mach_desc, size);
67 /* rename any peripherals used differing from the s3c2410 */
69 s3c_device_i2c.name = "s3c2440-i2c";
70 s3c_device_nand.name = "s3c2440-nand";
73 void __init s3c244x_init_clocks(int xtal)
77 unsigned long hclk, fclk, pclk;
80 /* now we've got our machine bits initialised, work out what
83 fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
85 clkdiv = __raw_readl(S3C2410_CLKDIVN);
86 camdiv = __raw_readl(S3C2440_CAMDIVN);
88 /* work out clock scalings */
90 switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
91 case S3C2440_CLKDIVN_HDIVN_1:
95 case S3C2440_CLKDIVN_HDIVN_2:
99 case S3C2440_CLKDIVN_HDIVN_4_8:
100 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
103 case S3C2440_CLKDIVN_HDIVN_3_6:
104 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
109 pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1);
111 /* print brief summary of clocks, etc */
113 printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
114 print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
116 /* initialise the clocks here, to allow other things like the
117 * console to use them, and to add new ones after the initialisation
120 s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
125 static struct sleep_save s3c244x_sleep[] = {
126 SAVE_ITEM(S3C2440_DSC0),
127 SAVE_ITEM(S3C2440_DSC1),
128 SAVE_ITEM(S3C2440_GPJDAT),
129 SAVE_ITEM(S3C2440_GPJCON),
130 SAVE_ITEM(S3C2440_GPJUP)
133 static int s3c244x_suspend(struct sys_device *dev, pm_message_t state)
135 s3c2410_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
139 static int s3c244x_resume(struct sys_device *dev)
141 s3c2410_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
146 #define s3c244x_suspend NULL
147 #define s3c244x_resume NULL
150 /* Since the S3C2442 and S3C2440 share items, put both sysclasses here */
152 struct sysdev_class s3c2440_sysclass = {
153 set_kset_name("s3c2440-core"),
154 .suspend = s3c244x_suspend,
155 .resume = s3c244x_resume
158 struct sysdev_class s3c2442_sysclass = {
159 set_kset_name("s3c2442-core"),
160 .suspend = s3c244x_suspend,
161 .resume = s3c244x_resume
164 /* need to register class before we actually register the device, and
165 * we also need to ensure that it has been initialised before any of the
166 * drivers even try to use it (even if not on an s3c2440 based system)
167 * as a driver which may support both 2410 and 2440 may try and use it.
170 static int __init s3c2440_core_init(void)
172 return sysdev_class_register(&s3c2440_sysclass);
175 core_initcall(s3c2440_core_init);
177 static int __init s3c2442_core_init(void)
179 return sysdev_class_register(&s3c2442_sysclass);
182 core_initcall(s3c2442_core_init);