1/*
2 * Copyright (c) 2006 Simtec Electronics
3 *	Ben Dooks <ben@simtec.co.uk>
4 *
5 * http://armlinux.simtec.co.uk/.
6 *
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.
10*/
11
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>
25#include <linux/io.h>
26#include <linux/reboot.h>
27
28#include <asm/mach/arch.h>
29#include <asm/mach/map.h>
30#include <asm/mach/irq.h>
31
32#include <asm/proc-fns.h>
33#include <asm/irq.h>
34#include <asm/system_misc.h>
35
36#include <mach/hardware.h>
37#include <mach/regs-clock.h>
38#include <mach/regs-gpio.h>
39
40#include <plat/cpu.h>
41#include <plat/cpu-freq.h>
42#include <plat/devs.h>
43#include <plat/pm.h>
44#include <plat/regs-spi.h>
45
46#include "common.h"
47#include "nand-core.h"
48#include "regs-dsc.h"
49#include "s3c2412-power.h"
50
51#ifndef CONFIG_CPU_S3C2412_ONLY
52void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
53
54static inline void s3c2412_init_gpio2(void)
55{
56	s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
57}
58#else
59#define s3c2412_init_gpio2() do { } while(0)
60#endif
61
62/* Initial IO mappings */
63
64static struct map_desc s3c2412_iodesc[] __initdata = {
65	IODESC_ENT(CLKPWR),
66	IODESC_ENT(TIMER),
67	IODESC_ENT(WATCHDOG),
68	{
69		.virtual = (unsigned long)S3C2412_VA_SSMC,
70		.pfn	 = __phys_to_pfn(S3C2412_PA_SSMC),
71		.length	 = SZ_1M,
72		.type	 = MT_DEVICE,
73	},
74	{
75		.virtual = (unsigned long)S3C2412_VA_EBI,
76		.pfn	 = __phys_to_pfn(S3C2412_PA_EBI),
77		.length	 = SZ_1M,
78		.type	 = MT_DEVICE,
79	},
80};
81
82/* uart registration process */
83
84void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
85{
86	s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
87
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");
92
93	/* alter IRQ of SDI controller */
94
95	s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
96	s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
97
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;
104
105}
106
107/* s3c2412_idle
108 *
109 * use the standard idle call by ensuring the idle mode
110 * in power config, then issuing the idle co-processor
111 * instruction
112*/
113
114static void s3c2412_idle(void)
115{
116	unsigned long tmp;
117
118	/* ensure our idle mode is to go to idle */
119
120	tmp = __raw_readl(S3C2412_PWRCFG);
121	tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
122	tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
123	__raw_writel(tmp, S3C2412_PWRCFG);
124
125	cpu_do_idle();
126}
127
128/* s3c2412_map_io
129 *
130 * register the standard cpu IO areas, and any passed in from the
131 * machine specific initialisation.
132*/
133
134void __init s3c2412_map_io(void)
135{
136	/* move base of IO */
137
138	s3c2412_init_gpio2();
139
140	/* set our idle function */
141
142	arm_pm_idle = s3c2412_idle;
143
144	/* register our io-tables */
145
146	iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
147}
148
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.
153*/
154
155struct bus_type s3c2412_subsys = {
156	.name = "s3c2412-core",
157	.dev_name = "s3c2412-core",
158};
159
160static int __init s3c2412_core_init(void)
161{
162	return subsys_system_register(&s3c2412_subsys, NULL);
163}
164
165core_initcall(s3c2412_core_init);
166
167static struct device s3c2412_dev = {
168	.bus		= &s3c2412_subsys,
169};
170
171int __init s3c2412_init(void)
172{
173	printk("S3C2412: Initialising architecture\n");
174
175#ifdef CONFIG_PM_SLEEP
176	register_syscore_ops(&s3c2412_pm_syscore_ops);
177	register_syscore_ops(&s3c24xx_irq_syscore_ops);
178#endif
179
180	return device_register(&s3c2412_dev);
181}
182