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 <mach/hardware.h>
33 #include <mach/regs-clock.h>
34 #include <mach/regs-gpio.h>
35
36 #include <plat/cpu.h>
37 #include <plat/cpu-freq.h>
38 #include <plat/devs.h>
39 #include <plat/pm.h>
40 #include <plat/regs-spi.h>
41
42 #include "common.h"
43 #include "nand-core.h"
44 #include "regs-dsc.h"
45 #include "s3c2412-power.h"
46
47 #ifndef CONFIG_CPU_S3C2412_ONLY
48 void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
49
s3c2412_init_gpio2(void)50 static inline void s3c2412_init_gpio2(void)
51 {
52 s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
53 }
54 #else
55 #define s3c2412_init_gpio2() do { } while(0)
56 #endif
57
58 /* Initial IO mappings */
59
60 static struct map_desc s3c2412_iodesc[] __initdata = {
61 IODESC_ENT(CLKPWR),
62 IODESC_ENT(TIMER),
63 IODESC_ENT(WATCHDOG),
64 {
65 .virtual = (unsigned long)S3C2412_VA_SSMC,
66 .pfn = __phys_to_pfn(S3C2412_PA_SSMC),
67 .length = SZ_1M,
68 .type = MT_DEVICE,
69 },
70 {
71 .virtual = (unsigned long)S3C2412_VA_EBI,
72 .pfn = __phys_to_pfn(S3C2412_PA_EBI),
73 .length = SZ_1M,
74 .type = MT_DEVICE,
75 },
76 };
77
78 /* uart registration process */
79
s3c2412_init_uarts(struct s3c2410_uartcfg * cfg,int no)80 void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
81 {
82 s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
83
84 /* rename devices that are s3c2412/s3c2413 specific */
85 s3c_device_sdi.name = "s3c2412-sdi";
86 s3c_device_lcd.name = "s3c2412-lcd";
87 s3c_nand_setname("s3c2412-nand");
88
89 /* alter IRQ of SDI controller */
90
91 s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
92 s3c_device_sdi.resource[1].end = IRQ_S3C2412_SDI;
93
94 /* spi channel related changes, s3c2412/13 specific */
95 s3c_device_spi0.name = "s3c2412-spi";
96 s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
97 s3c_device_spi1.name = "s3c2412-spi";
98 s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
99 s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
100
101 }
102
103 /* s3c2412_idle
104 *
105 * use the standard idle call by ensuring the idle mode
106 * in power config, then issuing the idle co-processor
107 * instruction
108 */
109
s3c2412_idle(void)110 static void s3c2412_idle(void)
111 {
112 unsigned long tmp;
113
114 /* ensure our idle mode is to go to idle */
115
116 tmp = __raw_readl(S3C2412_PWRCFG);
117 tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
118 tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
119 __raw_writel(tmp, S3C2412_PWRCFG);
120
121 cpu_do_idle();
122 }
123
124 /* s3c2412_map_io
125 *
126 * register the standard cpu IO areas, and any passed in from the
127 * machine specific initialisation.
128 */
129
s3c2412_map_io(void)130 void __init s3c2412_map_io(void)
131 {
132 /* move base of IO */
133
134 s3c2412_init_gpio2();
135
136 /* set our idle function */
137
138 arm_pm_idle = s3c2412_idle;
139
140 /* register our io-tables */
141
142 iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
143 }
144
145 /* need to register the subsystem before we actually register the device, and
146 * we also need to ensure that it has been initialised before any of the
147 * drivers even try to use it (even if not on an s3c2412 based system)
148 * as a driver which may support both 2410 and 2440 may try and use it.
149 */
150
151 struct bus_type s3c2412_subsys = {
152 .name = "s3c2412-core",
153 .dev_name = "s3c2412-core",
154 };
155
s3c2412_core_init(void)156 static int __init s3c2412_core_init(void)
157 {
158 return subsys_system_register(&s3c2412_subsys, NULL);
159 }
160
161 core_initcall(s3c2412_core_init);
162
163 static struct device s3c2412_dev = {
164 .bus = &s3c2412_subsys,
165 };
166
s3c2412_init(void)167 int __init s3c2412_init(void)
168 {
169 printk("S3C2412: Initialising architecture\n");
170
171 #ifdef CONFIG_PM_SLEEP
172 register_syscore_ops(&s3c2412_pm_syscore_ops);
173 register_syscore_ops(&s3c24xx_irq_syscore_ops);
174 #endif
175
176 return device_register(&s3c2412_dev);
177 }
178
