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>
45 static struct map_desc s3c244x_iodesc[] __initdata = {
54 /* uart initialisation */
56 void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
58 s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
61 void __init s3c244x_map_io(struct map_desc *mach_desc, int size)
63 /* register our io-tables */
65 iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
66 iotable_init(mach_desc, size);
68 /* rename any peripherals used differing from the s3c2410 */
70 s3c_device_i2c.name = "s3c2440-i2c";
71 s3c_device_nand.name = "s3c2440-nand";
72 s3c_device_usbgadget.name = "s3c2440-usbgadget";
75 void __init s3c244x_init_clocks(int xtal)
79 unsigned long hclk, fclk, pclk;
82 /* now we've got our machine bits initialised, work out what
85 fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
87 clkdiv = __raw_readl(S3C2410_CLKDIVN);
88 camdiv = __raw_readl(S3C2440_CAMDIVN);
90 /* work out clock scalings */
92 switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
93 case S3C2440_CLKDIVN_HDIVN_1:
97 case S3C2440_CLKDIVN_HDIVN_2:
101 case S3C2440_CLKDIVN_HDIVN_4_8:
102 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
105 case S3C2440_CLKDIVN_HDIVN_3_6:
106 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
111 pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1);
113 /* print brief summary of clocks, etc */
115 printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
116 print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
118 /* initialise the clocks here, to allow other things like the
119 * console to use them, and to add new ones after the initialisation
122 s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
123 s3c2410_baseclk_add();
128 static struct sleep_save s3c244x_sleep[] = {
129 SAVE_ITEM(S3C2440_DSC0),
130 SAVE_ITEM(S3C2440_DSC1),
131 SAVE_ITEM(S3C2440_GPJDAT),
132 SAVE_ITEM(S3C2440_GPJCON),
133 SAVE_ITEM(S3C2440_GPJUP)
136 static int s3c244x_suspend(struct sys_device *dev, pm_message_t state)
138 s3c2410_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
142 static int s3c244x_resume(struct sys_device *dev)
144 s3c2410_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
149 #define s3c244x_suspend NULL
150 #define s3c244x_resume NULL
153 /* Since the S3C2442 and S3C2440 share items, put both sysclasses here */
155 struct sysdev_class s3c2440_sysclass = {
156 set_kset_name("s3c2440-core"),
157 .suspend = s3c244x_suspend,
158 .resume = s3c244x_resume
161 struct sysdev_class s3c2442_sysclass = {
162 set_kset_name("s3c2442-core"),
163 .suspend = s3c244x_suspend,
164 .resume = s3c244x_resume
167 /* need to register class before we actually register the device, and
168 * we also need to ensure that it has been initialised before any of the
169 * drivers even try to use it (even if not on an s3c2440 based system)
170 * as a driver which may support both 2410 and 2440 may try and use it.
173 static int __init s3c2440_core_init(void)
175 return sysdev_class_register(&s3c2440_sysclass);
178 core_initcall(s3c2440_core_init);
180 static int __init s3c2442_core_init(void)
182 return sysdev_class_register(&s3c2442_sysclass);
185 core_initcall(s3c2442_core_init);