Commit | Line | Data |
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a21765a7 | 1 | /* linux/arch/arm/plat-s3c24xx/cpu.c |
1da177e4 LT |
2 | * |
3 | * Copyright (c) 2004-2005 Simtec Electronics | |
4 | * http://www.simtec.co.uk/products/SWLINUX/ | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * | |
7 | * S3C24XX CPU Support | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | ||
25 | #include <linux/init.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/ioport.h> | |
b6d1f542 | 29 | #include <linux/serial_core.h> |
d052d1be | 30 | #include <linux/platform_device.h> |
3c7d9c81 | 31 | #include <linux/delay.h> |
fced80c7 | 32 | #include <linux/io.h> |
1da177e4 | 33 | |
a09e64fb | 34 | #include <mach/hardware.h> |
92311272 | 35 | #include <mach/regs-clock.h> |
1da177e4 | 36 | #include <asm/irq.h> |
3c7d9c81 | 37 | #include <asm/cacheflush.h> |
9f97da78 | 38 | #include <asm/system_info.h> |
1da177e4 LT |
39 | |
40 | #include <asm/mach/arch.h> | |
41 | #include <asm/mach/map.h> | |
42 | ||
a09e64fb | 43 | #include <mach/regs-gpio.h> |
a2b7ba9c | 44 | #include <plat/regs-serial.h> |
1da177e4 | 45 | |
a2b7ba9c BD |
46 | #include <plat/cpu.h> |
47 | #include <plat/devs.h> | |
d5120ae7 | 48 | #include <plat/clock.h> |
a2b7ba9c | 49 | #include <plat/s3c2410.h> |
d5120ae7 | 50 | #include <plat/s3c2412.h> |
f1290a49 | 51 | #include <plat/s3c2416.h> |
58bac7b8 | 52 | #include <plat/s3c244x.h> |
a2b7ba9c | 53 | #include <plat/s3c2443.h> |
1da177e4 | 54 | |
1da177e4 LT |
55 | /* table of supported CPUs */ |
56 | ||
57 | static const char name_s3c2410[] = "S3C2410"; | |
68d9ab39 | 58 | static const char name_s3c2412[] = "S3C2412"; |
63b1f51b | 59 | static const char name_s3c2416[] = "S3C2416/S3C2450"; |
1da177e4 | 60 | static const char name_s3c2440[] = "S3C2440"; |
96ce2385 | 61 | static const char name_s3c2442[] = "S3C2442"; |
f5fb9b1a | 62 | static const char name_s3c2442b[] = "S3C2442B"; |
e4d06e39 | 63 | static const char name_s3c2443[] = "S3C2443"; |
1da177e4 LT |
64 | static const char name_s3c2410a[] = "S3C2410A"; |
65 | static const char name_s3c2440a[] = "S3C2440A"; | |
66 | ||
67 | static struct cpu_table cpu_ids[] __initdata = { | |
68 | { | |
69 | .idcode = 0x32410000, | |
70 | .idmask = 0xffffffff, | |
71 | .map_io = s3c2410_map_io, | |
72 | .init_clocks = s3c2410_init_clocks, | |
73 | .init_uarts = s3c2410_init_uarts, | |
74 | .init = s3c2410_init, | |
75 | .name = name_s3c2410 | |
76 | }, | |
77 | { | |
78 | .idcode = 0x32410002, | |
79 | .idmask = 0xffffffff, | |
80 | .map_io = s3c2410_map_io, | |
81 | .init_clocks = s3c2410_init_clocks, | |
82 | .init_uarts = s3c2410_init_uarts, | |
f0176794 | 83 | .init = s3c2410a_init, |
1da177e4 LT |
84 | .name = name_s3c2410a |
85 | }, | |
86 | { | |
87 | .idcode = 0x32440000, | |
88 | .idmask = 0xffffffff, | |
812c4e40 | 89 | .map_io = s3c2440_map_io, |
96ce2385 BD |
90 | .init_clocks = s3c244x_init_clocks, |
91 | .init_uarts = s3c244x_init_uarts, | |
1da177e4 LT |
92 | .init = s3c2440_init, |
93 | .name = name_s3c2440 | |
94 | }, | |
95 | { | |
96 | .idcode = 0x32440001, | |
97 | .idmask = 0xffffffff, | |
812c4e40 | 98 | .map_io = s3c2440_map_io, |
96ce2385 BD |
99 | .init_clocks = s3c244x_init_clocks, |
100 | .init_uarts = s3c244x_init_uarts, | |
1da177e4 LT |
101 | .init = s3c2440_init, |
102 | .name = name_s3c2440a | |
83f755f5 | 103 | }, |
96ce2385 BD |
104 | { |
105 | .idcode = 0x32440aaa, | |
106 | .idmask = 0xffffffff, | |
812c4e40 | 107 | .map_io = s3c2442_map_io, |
96ce2385 BD |
108 | .init_clocks = s3c244x_init_clocks, |
109 | .init_uarts = s3c244x_init_uarts, | |
110 | .init = s3c2442_init, | |
111 | .name = name_s3c2442 | |
112 | }, | |
f5fb9b1a HW |
113 | { |
114 | .idcode = 0x32440aab, | |
115 | .idmask = 0xffffffff, | |
812c4e40 | 116 | .map_io = s3c2442_map_io, |
f5fb9b1a HW |
117 | .init_clocks = s3c244x_init_clocks, |
118 | .init_uarts = s3c244x_init_uarts, | |
119 | .init = s3c2442_init, | |
120 | .name = name_s3c2442b | |
121 | }, | |
68d9ab39 BD |
122 | { |
123 | .idcode = 0x32412001, | |
124 | .idmask = 0xffffffff, | |
125 | .map_io = s3c2412_map_io, | |
126 | .init_clocks = s3c2412_init_clocks, | |
127 | .init_uarts = s3c2412_init_uarts, | |
128 | .init = s3c2412_init, | |
129 | .name = name_s3c2412, | |
130 | }, | |
d9bc55fa BD |
131 | { /* a newer version of the s3c2412 */ |
132 | .idcode = 0x32412003, | |
133 | .idmask = 0xffffffff, | |
134 | .map_io = s3c2412_map_io, | |
135 | .init_clocks = s3c2412_init_clocks, | |
136 | .init_uarts = s3c2412_init_uarts, | |
137 | .init = s3c2412_init, | |
138 | .name = name_s3c2412, | |
139 | }, | |
f1290a49 YK |
140 | { /* a strange version of the s3c2416 */ |
141 | .idcode = 0x32450003, | |
142 | .idmask = 0xffffffff, | |
143 | .map_io = s3c2416_map_io, | |
144 | .init_clocks = s3c2416_init_clocks, | |
145 | .init_uarts = s3c2416_init_uarts, | |
146 | .init = s3c2416_init, | |
147 | .name = name_s3c2416, | |
148 | }, | |
e4d06e39 BD |
149 | { |
150 | .idcode = 0x32443001, | |
151 | .idmask = 0xffffffff, | |
152 | .map_io = s3c2443_map_io, | |
153 | .init_clocks = s3c2443_init_clocks, | |
154 | .init_uarts = s3c2443_init_uarts, | |
155 | .init = s3c2443_init, | |
156 | .name = name_s3c2443, | |
157 | }, | |
1da177e4 LT |
158 | }; |
159 | ||
160 | /* minimal IO mapping */ | |
161 | ||
162 | static struct map_desc s3c_iodesc[] __initdata = { | |
163 | IODESC_ENT(GPIO), | |
164 | IODESC_ENT(IRQ), | |
165 | IODESC_ENT(MEMCTRL), | |
166 | IODESC_ENT(UART) | |
167 | }; | |
168 | ||
74b265d4 | 169 | /* read cpu identificaiton code */ |
1da177e4 | 170 | |
68d9ab39 BD |
171 | static unsigned long s3c24xx_read_idcode_v5(void) |
172 | { | |
d11a7d71 BD |
173 | #if defined(CONFIG_CPU_S3C2416) |
174 | /* s3c2416 is v5, with S3C24XX_GSTATUS1 instead of S3C2412_GSTATUS1 */ | |
175 | ||
176 | u32 gs = __raw_readl(S3C24XX_GSTATUS1); | |
177 | ||
178 | /* test for s3c2416 or similar device */ | |
179 | if ((gs >> 16) == 0x3245) | |
180 | return gs; | |
181 | #endif | |
182 | ||
68d9ab39 BD |
183 | #if defined(CONFIG_CPU_S3C2412) || defined(CONFIG_CPU_S3C2413) |
184 | return __raw_readl(S3C2412_GSTATUS1); | |
185 | #else | |
186 | return 1UL; /* don't look like an 2400 */ | |
187 | #endif | |
188 | } | |
189 | ||
190 | static unsigned long s3c24xx_read_idcode_v4(void) | |
191 | { | |
68d9ab39 | 192 | return __raw_readl(S3C2410_GSTATUS1); |
68d9ab39 BD |
193 | } |
194 | ||
92311272 NP |
195 | static void s3c24xx_default_idle(void) |
196 | { | |
197 | unsigned long tmp; | |
198 | int i; | |
199 | ||
200 | /* idle the system by using the idle mode which will wait for an | |
201 | * interrupt to happen before restarting the system. | |
202 | */ | |
203 | ||
204 | /* Warning: going into idle state upsets jtag scanning */ | |
205 | ||
206 | __raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE, | |
207 | S3C2410_CLKCON); | |
208 | ||
209 | /* the samsung port seems to do a loop and then unset idle.. */ | |
210 | for (i = 0; i < 50; i++) | |
211 | tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */ | |
212 | ||
213 | /* this bit is not cleared on re-start... */ | |
214 | ||
215 | __raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE, | |
216 | S3C2410_CLKCON); | |
217 | } | |
218 | ||
1da177e4 LT |
219 | void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) |
220 | { | |
92311272 NP |
221 | arm_pm_idle = s3c24xx_default_idle; |
222 | ||
1da177e4 | 223 | /* initialise the io descriptors we need for initialisation */ |
74b265d4 | 224 | iotable_init(mach_desc, size); |
1da177e4 LT |
225 | iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); |
226 | ||
68d9ab39 | 227 | if (cpu_architecture() >= CPU_ARCH_ARMv5) { |
c06af3cc | 228 | samsung_cpu_id = s3c24xx_read_idcode_v5(); |
68d9ab39 | 229 | } else { |
c06af3cc | 230 | samsung_cpu_id = s3c24xx_read_idcode_v4(); |
68d9ab39 | 231 | } |
e6d1cb9f | 232 | s3c24xx_init_cpu(); |
83f755f5 | 233 | |
c06af3cc | 234 | s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids)); |
66a9b49a | 235 | } |