2 * Copyright (c) 2006 Simtec Electronics
3 * Ben Dooks <ben@simtec.co.uk>
5 * http://armlinux.simtec.co.uk/.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/interrupt.h>
15 #include <linux/list.h>
16 #include <linux/timer.h>
17 #include <linux/init.h>
18 #include <linux/clk.h>
19 #include <linux/delay.h>
20 #include <linux/device.h>
21 #include <linux/syscore_ops.h>
22 #include <linux/serial_core.h>
23 #include <linux/serial_s3c.h>
24 #include <linux/platform_device.h>
26 #include <linux/reboot.h>
28 #include <asm/mach/arch.h>
29 #include <asm/mach/map.h>
30 #include <asm/mach/irq.h>
32 #include <asm/proc-fns.h>
34 #include <asm/system_misc.h>
36 #include <mach/hardware.h>
37 #include <mach/regs-clock.h>
38 #include <mach/regs-gpio.h>
41 #include <plat/cpu-freq.h>
42 #include <plat/devs.h>
43 #include <plat/nand-core.h>
45 #include <plat/regs-spi.h>
49 #include "s3c2412-power.h"
51 #ifndef CONFIG_CPU_S3C2412_ONLY
52 void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
54 static inline void s3c2412_init_gpio2(void)
56 s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
59 #define s3c2412_init_gpio2() do { } while(0)
62 /* Initial IO mappings */
64 static struct map_desc s3c2412_iodesc[] __initdata = {
69 .virtual = (unsigned long)S3C2412_VA_SSMC,
70 .pfn = __phys_to_pfn(S3C2412_PA_SSMC),
75 .virtual = (unsigned long)S3C2412_VA_EBI,
76 .pfn = __phys_to_pfn(S3C2412_PA_EBI),
82 /* uart registration process */
84 void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
86 s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
88 /* rename devices that are s3c2412/s3c2413 specific */
89 s3c_device_sdi.name = "s3c2412-sdi";
90 s3c_device_lcd.name = "s3c2412-lcd";
91 s3c_nand_setname("s3c2412-nand");
93 /* alter IRQ of SDI controller */
95 s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
96 s3c_device_sdi.resource[1].end = IRQ_S3C2412_SDI;
98 /* spi channel related changes, s3c2412/13 specific */
99 s3c_device_spi0.name = "s3c2412-spi";
100 s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
101 s3c_device_spi1.name = "s3c2412-spi";
102 s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
103 s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
109 * use the standard idle call by ensuring the idle mode
110 * in power config, then issuing the idle co-processor
114 static void s3c2412_idle(void)
118 /* ensure our idle mode is to go to idle */
120 tmp = __raw_readl(S3C2412_PWRCFG);
121 tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
122 tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
123 __raw_writel(tmp, S3C2412_PWRCFG);
130 * register the standard cpu IO areas, and any passed in from the
131 * machine specific initialisation.
134 void __init s3c2412_map_io(void)
136 /* move base of IO */
138 s3c2412_init_gpio2();
140 /* set our idle function */
142 arm_pm_idle = s3c2412_idle;
144 /* register our io-tables */
146 iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
149 /* need to register the subsystem before we actually register the device, and
150 * we also need to ensure that it has been initialised before any of the
151 * drivers even try to use it (even if not on an s3c2412 based system)
152 * as a driver which may support both 2410 and 2440 may try and use it.
155 struct bus_type s3c2412_subsys = {
156 .name = "s3c2412-core",
157 .dev_name = "s3c2412-core",
160 static int __init s3c2412_core_init(void)
162 return subsys_system_register(&s3c2412_subsys, NULL);
165 core_initcall(s3c2412_core_init);
167 static struct device s3c2412_dev = {
168 .bus = &s3c2412_subsys,
171 int __init s3c2412_init(void)
173 printk("S3C2412: Initialising architecture\n");
175 #ifdef CONFIG_PM_SLEEP
176 register_syscore_ops(&s3c2412_pm_syscore_ops);
177 register_syscore_ops(&s3c24xx_irq_syscore_ops);
180 return device_register(&s3c2412_dev);