1// SPDX-License-Identifier: GPL-2.0
2//
3// Copyright (c) 2006 Simtec Electronics
4//	Ben Dooks <ben@simtec.co.uk>
5//
6// http://armlinux.simtec.co.uk/.
7
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/interrupt.h>
11#include <linux/list.h>
12#include <linux/timer.h>
13#include <linux/init.h>
14#include <linux/clk.h>
15#include <linux/delay.h>
16#include <linux/device.h>
17#include <linux/syscore_ops.h>
18#include <linux/serial_core.h>
19#include <linux/serial_s3c.h>
20#include <linux/platform_device.h>
21#include <linux/io.h>
22#include <linux/reboot.h>
23
24#include <asm/mach/arch.h>
25#include <asm/mach/map.h>
26#include <asm/mach/irq.h>
27
28#include <asm/proc-fns.h>
29#include <asm/irq.h>
30#include <asm/system_misc.h>
31
32#include "map.h"
33#include "regs-clock.h"
34#include "regs-gpio.h"
35
36#include "cpu.h"
37#include "devs.h"
38#include "pm.h"
39
40#include "s3c24xx.h"
41#include "nand-core-s3c24xx.h"
42#include "regs-dsc-s3c24xx.h"
43#include "s3c2412-power.h"
44
45#ifndef CONFIG_CPU_S3C2412_ONLY
46void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
47
48static inline void s3c2412_init_gpio2(void)
49{
50	s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
51}
52#else
53#define s3c2412_init_gpio2() do { } while(0)
54#endif
55
56/* Initial IO mappings */
57
58static struct map_desc s3c2412_iodesc[] __initdata __maybe_unused = {
59	IODESC_ENT(CLKPWR),
60	IODESC_ENT(TIMER),
61	IODESC_ENT(WATCHDOG),
62	{
63		.virtual = (unsigned long)S3C2412_VA_SSMC,
64		.pfn	 = __phys_to_pfn(S3C2412_PA_SSMC),
65		.length	 = SZ_1M,
66		.type	 = MT_DEVICE,
67	},
68	{
69		.virtual = (unsigned long)S3C2412_VA_EBI,
70		.pfn	 = __phys_to_pfn(S3C2412_PA_EBI),
71		.length	 = SZ_1M,
72		.type	 = MT_DEVICE,
73	},
74};
75
76/* uart registration process */
77
78void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
79{
80	s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
81
82	/* rename devices that are s3c2412/s3c2413 specific */
83	s3c_device_sdi.name  = "s3c2412-sdi";
84	s3c_device_lcd.name  = "s3c2412-lcd";
85	s3c_nand_setname("s3c2412-nand");
86
87	/* alter IRQ of SDI controller */
88
89	s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
90	s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
91
92	/* spi channel related changes, s3c2412/13 specific */
93	s3c_device_spi0.name = "s3c2412-spi";
94	s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
95	s3c_device_spi1.name = "s3c2412-spi";
96	s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
97	s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
98
99}
100
101/* s3c2412_idle
102 *
103 * use the standard idle call by ensuring the idle mode
104 * in power config, then issuing the idle co-processor
105 * instruction
106*/
107
108static void s3c2412_idle(void)
109{
110	unsigned long tmp;
111
112	/* ensure our idle mode is to go to idle */
113
114	tmp = __raw_readl(S3C2412_PWRCFG);
115	tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
116	tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
117	__raw_writel(tmp, S3C2412_PWRCFG);
118
119	cpu_do_idle();
120}
121
122/* s3c2412_map_io
123 *
124 * register the standard cpu IO areas, and any passed in from the
125 * machine specific initialisation.
126*/
127
128void __init s3c2412_map_io(void)
129{
130	/* move base of IO */
131
132	s3c2412_init_gpio2();
133
134	/* set our idle function */
135
136	arm_pm_idle = s3c2412_idle;
137
138	/* register our io-tables */
139
140	iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
141}
142
143/* need to register the subsystem before we actually register the device, and
144 * we also need to ensure that it has been initialised before any of the
145 * drivers even try to use it (even if not on an s3c2412 based system)
146 * as a driver which may support both 2410 and 2440 may try and use it.
147*/
148
149struct bus_type s3c2412_subsys = {
150	.name = "s3c2412-core",
151	.dev_name = "s3c2412-core",
152};
153
154static int __init s3c2412_core_init(void)
155{
156	return subsys_system_register(&s3c2412_subsys, NULL);
157}
158
159core_initcall(s3c2412_core_init);
160
161static struct device s3c2412_dev = {
162	.bus		= &s3c2412_subsys,
163};
164
165int __init s3c2412_init(void)
166{
167	printk("S3C2412: Initialising architecture\n");
168
169#ifdef CONFIG_PM_SLEEP
170	register_syscore_ops(&s3c2412_pm_syscore_ops);
171	register_syscore_ops(&s3c24xx_irq_syscore_ops);
172#endif
173
174	return device_register(&s3c2412_dev);
175}
176