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1/* linux/arch/arm/plat-s3c24xx/s3c244x.c
2 *
3 * Copyright (c) 2004-2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443)
7 *
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.
11*/
12
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/serial_s3c.h>
21#include <linux/platform_device.h>
22#include <linux/reboot.h>
23#include <linux/device.h>
24#include <linux/syscore_ops.h>
25#include <linux/clk.h>
26#include <linux/io.h>
27
28#include <asm/system_misc.h>
29#include <asm/mach/arch.h>
30#include <asm/mach/map.h>
31#include <asm/mach/irq.h>
32
33#include <mach/hardware.h>
34#include <asm/irq.h>
35
36#include <plat/cpu-freq.h>
37
38#include <mach/regs-clock.h>
39#include <mach/regs-gpio.h>
40
41#include <plat/clock.h>
42#include <plat/devs.h>
43#include <plat/cpu.h>
44#include <plat/pm.h>
45#include <plat/pll.h>
46#include <plat/nand-core.h>
47#include <plat/watchdog-reset.h>
48
49#include "regs-dsc.h"
50
51static struct map_desc s3c244x_iodesc[] __initdata = {
52 IODESC_ENT(CLKPWR),
53 IODESC_ENT(TIMER),
54 IODESC_ENT(WATCHDOG),
55};
56
57/* uart initialisation */
58
59void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
60{
61 s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
62}
63
64void __init s3c244x_map_io(void)
65{
66 /* register our io-tables */
67
68 iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
69
70 /* rename any peripherals used differing from the s3c2410 */
71
72 s3c_device_sdi.name = "s3c2440-sdi";
73 s3c_device_i2c0.name = "s3c2440-i2c";
74 s3c_nand_setname("s3c2440-nand");
75 s3c_device_ts.name = "s3c2440-ts";
76 s3c_device_usbgadget.name = "s3c2440-usbgadget";
77}
78
79void __init_or_cpufreq s3c244x_setup_clocks(void)
80{
81 struct clk *xtal_clk;
82 unsigned long clkdiv;
83 unsigned long camdiv;
84 unsigned long xtal;
85 unsigned long hclk, fclk, pclk;
86 int hdiv = 1;
87
88 xtal_clk = clk_get(NULL, "xtal");
89 xtal = clk_get_rate(xtal_clk);
90 clk_put(xtal_clk);
91
92 fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
93
94 clkdiv = __raw_readl(S3C2410_CLKDIVN);
95 camdiv = __raw_readl(S3C2440_CAMDIVN);
96
97 /* work out clock scalings */
98
99 switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
100 case S3C2440_CLKDIVN_HDIVN_1:
101 hdiv = 1;
102 break;
103
104 case S3C2440_CLKDIVN_HDIVN_2:
105 hdiv = 2;
106 break;
107
108 case S3C2440_CLKDIVN_HDIVN_4_8:
109 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
110 break;
111
112 case S3C2440_CLKDIVN_HDIVN_3_6:
113 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
114 break;
115 }
116
117 hclk = fclk / hdiv;
118 pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1);
119
120 /* print brief summary of clocks, etc */
121
122 printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
123 print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
124
125 s3c24xx_setup_clocks(fclk, hclk, pclk);
126}
127
128void __init s3c244x_init_clocks(int xtal)
129{
130 /* initialise the clocks here, to allow other things like the
131 * console to use them, and to add new ones after the initialisation
132 */
133
134 s3c24xx_register_baseclocks(xtal);
135 s3c244x_setup_clocks();
136 s3c2410_baseclk_add();
137 samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
138}
139
140/* Since the S3C2442 and S3C2440 share items, put both subsystems here */
141
142struct bus_type s3c2440_subsys = {
143 .name = "s3c2440-core",
144 .dev_name = "s3c2440-core",
145};
146
147struct bus_type s3c2442_subsys = {
148 .name = "s3c2442-core",
149 .dev_name = "s3c2442-core",
150};
151
152/* need to register the subsystem before we actually register the device, and
153 * we also need to ensure that it has been initialised before any of the
154 * drivers even try to use it (even if not on an s3c2440 based system)
155 * as a driver which may support both 2410 and 2440 may try and use it.
156*/
157
158static int __init s3c2440_core_init(void)
159{
160 return subsys_system_register(&s3c2440_subsys, NULL);
161}
162
163core_initcall(s3c2440_core_init);
164
165static int __init s3c2442_core_init(void)
166{
167 return subsys_system_register(&s3c2442_subsys, NULL);
168}
169
170core_initcall(s3c2442_core_init);
171
172
173#ifdef CONFIG_PM
174static struct sleep_save s3c244x_sleep[] = {
175 SAVE_ITEM(S3C2440_DSC0),
176 SAVE_ITEM(S3C2440_DSC1),
177 SAVE_ITEM(S3C2440_GPJDAT),
178 SAVE_ITEM(S3C2440_GPJCON),
179 SAVE_ITEM(S3C2440_GPJUP)
180};
181
182static int s3c244x_suspend(void)
183{
184 s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
185 return 0;
186}
187
188static void s3c244x_resume(void)
189{
190 s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
191}
192#else
193#define s3c244x_suspend NULL
194#define s3c244x_resume NULL
195#endif
196
197struct syscore_ops s3c244x_pm_syscore_ops = {
198 .suspend = s3c244x_suspend,
199 .resume = s3c244x_resume,
200};
201
202void s3c244x_restart(enum reboot_mode mode, const char *cmd)
203{
204 if (mode == REBOOT_SOFT)
205 soft_restart(0);
206
207 samsung_wdt_reset();
208
209 /* we'll take a jump through zero as a poor second */
210 soft_restart(0);
211}
1// SPDX-License-Identifier: GPL-2.0
2//
3// Copyright (c) 2004-2006 Simtec Electronics
4// Ben Dooks <ben@simtec.co.uk>
5//
6// Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443)
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/serial_core.h>
15#include <linux/serial_s3c.h>
16#include <linux/platform_device.h>
17#include <linux/reboot.h>
18#include <linux/device.h>
19#include <linux/syscore_ops.h>
20#include <linux/clk.h>
21#include <linux/io.h>
22
23#include <asm/system_misc.h>
24#include <asm/mach/arch.h>
25#include <asm/mach/map.h>
26#include <asm/mach/irq.h>
27
28#include <mach/hardware.h>
29#include <asm/irq.h>
30
31#include <plat/cpu-freq.h>
32
33#include <mach/regs-clock.h>
34#include <mach/regs-gpio.h>
35
36#include <plat/devs.h>
37#include <plat/cpu.h>
38#include <plat/pm.h>
39
40#include "common.h"
41#include "nand-core.h"
42#include "regs-dsc.h"
43
44static struct map_desc s3c244x_iodesc[] __initdata = {
45 IODESC_ENT(CLKPWR),
46 IODESC_ENT(TIMER),
47 IODESC_ENT(WATCHDOG),
48};
49
50/* uart initialisation */
51
52void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no)
53{
54 s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no);
55}
56
57void __init s3c244x_map_io(void)
58{
59 /* register our io-tables */
60
61 iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc));
62
63 /* rename any peripherals used differing from the s3c2410 */
64
65 s3c_device_sdi.name = "s3c2440-sdi";
66 s3c_device_i2c0.name = "s3c2440-i2c";
67 s3c_nand_setname("s3c2440-nand");
68 s3c_device_ts.name = "s3c2440-ts";
69 s3c_device_usbgadget.name = "s3c2440-usbgadget";
70 s3c2410_device_dclk.name = "s3c2440-dclk";
71}
72
73/* Since the S3C2442 and S3C2440 share items, put both subsystems here */
74
75struct bus_type s3c2440_subsys = {
76 .name = "s3c2440-core",
77 .dev_name = "s3c2440-core",
78};
79
80struct bus_type s3c2442_subsys = {
81 .name = "s3c2442-core",
82 .dev_name = "s3c2442-core",
83};
84
85/* need to register the subsystem before we actually register the device, and
86 * we also need to ensure that it has been initialised before any of the
87 * drivers even try to use it (even if not on an s3c2440 based system)
88 * as a driver which may support both 2410 and 2440 may try and use it.
89*/
90
91static int __init s3c2440_core_init(void)
92{
93 return subsys_system_register(&s3c2440_subsys, NULL);
94}
95
96core_initcall(s3c2440_core_init);
97
98static int __init s3c2442_core_init(void)
99{
100 return subsys_system_register(&s3c2442_subsys, NULL);
101}
102
103core_initcall(s3c2442_core_init);
104
105
106#ifdef CONFIG_PM_SLEEP
107static struct sleep_save s3c244x_sleep[] = {
108 SAVE_ITEM(S3C2440_DSC0),
109 SAVE_ITEM(S3C2440_DSC1),
110 SAVE_ITEM(S3C2440_GPJDAT),
111 SAVE_ITEM(S3C2440_GPJCON),
112 SAVE_ITEM(S3C2440_GPJUP)
113};
114
115static int s3c244x_suspend(void)
116{
117 s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
118 return 0;
119}
120
121static void s3c244x_resume(void)
122{
123 s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
124}
125
126struct syscore_ops s3c244x_pm_syscore_ops = {
127 .suspend = s3c244x_suspend,
128 .resume = s3c244x_resume,
129};
130#endif