1 /* linux/arch/arm/plat-s3c24xx/s3c244x.c
3 * Copyright (c) 2004-2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443)
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/serial_core.h>
20 #include <linux/platform_device.h>
21 #include <linux/sysdev.h>
22 #include <linux/clk.h>
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
27 #include <asm/mach/irq.h>
29 #include <mach/hardware.h>
32 #include <plat/cpu-freq.h>
34 #include <mach/regs-clock.h>
35 #include <plat/regs-serial.h>
36 #include <mach/regs-gpio.h>
37 #include <mach/regs-gpioj.h>
38 #include <mach/regs-dsc.h>
40 #include <plat/s3c2410.h>
41 #include <plat/s3c2440.h>
43 #include <plat/clock.h>
44 #include <plat/devs.h>
49 static struct map_desc s3c244x_iodesc[] __initdata = {
55 /* uart initialisation */
57 void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
59 s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
62 void __init s3c244x_map_io(void)
64 /* register our io-tables */
66 iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
68 /* rename any peripherals used differing from the s3c2410 */
70 s3c_device_sdi.name = "s3c2440-sdi";
71 s3c_device_i2c0.name = "s3c2440-i2c";
72 s3c_device_nand.name = "s3c2440-nand";
73 s3c_device_usbgadget.name = "s3c2440-usbgadget";
76 void __init_or_cpufreq s3c244x_setup_clocks(void)
82 unsigned long hclk, fclk, pclk;
85 xtal_clk = clk_get(NULL, "xtal");
86 xtal = clk_get_rate(xtal_clk);
89 fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
91 clkdiv = __raw_readl(S3C2410_CLKDIVN);
92 camdiv = __raw_readl(S3C2440_CAMDIVN);
94 /* work out clock scalings */
96 switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
97 case S3C2440_CLKDIVN_HDIVN_1:
101 case S3C2440_CLKDIVN_HDIVN_2:
105 case S3C2440_CLKDIVN_HDIVN_4_8:
106 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
109 case S3C2440_CLKDIVN_HDIVN_3_6:
110 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
115 pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1);
117 /* print brief summary of clocks, etc */
119 printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
120 print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
122 s3c24xx_setup_clocks(fclk, hclk, pclk);
125 void __init s3c244x_init_clocks(int xtal)
127 /* initialise the clocks here, to allow other things like the
128 * console to use them, and to add new ones after the initialisation
131 s3c24xx_register_baseclocks(xtal);
132 s3c244x_setup_clocks();
133 s3c2410_baseclk_add();
138 static struct sleep_save s3c244x_sleep[] = {
139 SAVE_ITEM(S3C2440_DSC0),
140 SAVE_ITEM(S3C2440_DSC1),
141 SAVE_ITEM(S3C2440_GPJDAT),
142 SAVE_ITEM(S3C2440_GPJCON),
143 SAVE_ITEM(S3C2440_GPJUP)
146 static int s3c244x_suspend(struct sys_device *dev, pm_message_t state)
148 s3c2410_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
152 static int s3c244x_resume(struct sys_device *dev)
154 s3c2410_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
159 #define s3c244x_suspend NULL
160 #define s3c244x_resume NULL
163 /* Since the S3C2442 and S3C2440 share items, put both sysclasses here */
165 struct sysdev_class s3c2440_sysclass = {
166 .name = "s3c2440-core",
167 .suspend = s3c244x_suspend,
168 .resume = s3c244x_resume
171 struct sysdev_class s3c2442_sysclass = {
172 .name = "s3c2442-core",
173 .suspend = s3c244x_suspend,
174 .resume = s3c244x_resume
177 /* need to register class before we actually register the device, and
178 * we also need to ensure that it has been initialised before any of the
179 * drivers even try to use it (even if not on an s3c2440 based system)
180 * as a driver which may support both 2410 and 2440 may try and use it.
183 static int __init s3c2440_core_init(void)
185 return sysdev_class_register(&s3c2440_sysclass);
188 core_initcall(s3c2440_core_init);
190 static int __init s3c2442_core_init(void)
192 return sysdev_class_register(&s3c2442_sysclass);
195 core_initcall(s3c2442_core_init);