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 | * | |
4a9f52fd | 7 | * Common code for S3C24XX machines |
1da177e4 LT |
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> |
86dfe446 | 39 | #include <asm/system_misc.h> |
1da177e4 LT |
40 | |
41 | #include <asm/mach/arch.h> | |
42 | #include <asm/mach/map.h> | |
43 | ||
a09e64fb | 44 | #include <mach/regs-gpio.h> |
a2b7ba9c | 45 | #include <plat/regs-serial.h> |
1da177e4 | 46 | |
a2b7ba9c BD |
47 | #include <plat/cpu.h> |
48 | #include <plat/devs.h> | |
d5120ae7 | 49 | #include <plat/clock.h> |
a2b7ba9c | 50 | #include <plat/s3c2410.h> |
d5120ae7 | 51 | #include <plat/s3c2412.h> |
f1290a49 | 52 | #include <plat/s3c2416.h> |
58bac7b8 | 53 | #include <plat/s3c244x.h> |
a2b7ba9c | 54 | #include <plat/s3c2443.h> |
2473f713 HS |
55 | #include <plat/cpu-freq.h> |
56 | #include <plat/pll.h> | |
1da177e4 | 57 | |
1da177e4 LT |
58 | /* table of supported CPUs */ |
59 | ||
60 | static const char name_s3c2410[] = "S3C2410"; | |
68d9ab39 | 61 | static const char name_s3c2412[] = "S3C2412"; |
63b1f51b | 62 | static const char name_s3c2416[] = "S3C2416/S3C2450"; |
1da177e4 | 63 | static const char name_s3c2440[] = "S3C2440"; |
96ce2385 | 64 | static const char name_s3c2442[] = "S3C2442"; |
f5fb9b1a | 65 | static const char name_s3c2442b[] = "S3C2442B"; |
e4d06e39 | 66 | static const char name_s3c2443[] = "S3C2443"; |
1da177e4 LT |
67 | static const char name_s3c2410a[] = "S3C2410A"; |
68 | static const char name_s3c2440a[] = "S3C2440A"; | |
69 | ||
70 | static struct cpu_table cpu_ids[] __initdata = { | |
71 | { | |
72 | .idcode = 0x32410000, | |
73 | .idmask = 0xffffffff, | |
74 | .map_io = s3c2410_map_io, | |
75 | .init_clocks = s3c2410_init_clocks, | |
76 | .init_uarts = s3c2410_init_uarts, | |
77 | .init = s3c2410_init, | |
78 | .name = name_s3c2410 | |
79 | }, | |
80 | { | |
81 | .idcode = 0x32410002, | |
82 | .idmask = 0xffffffff, | |
83 | .map_io = s3c2410_map_io, | |
84 | .init_clocks = s3c2410_init_clocks, | |
85 | .init_uarts = s3c2410_init_uarts, | |
f0176794 | 86 | .init = s3c2410a_init, |
1da177e4 LT |
87 | .name = name_s3c2410a |
88 | }, | |
89 | { | |
90 | .idcode = 0x32440000, | |
91 | .idmask = 0xffffffff, | |
812c4e40 | 92 | .map_io = s3c2440_map_io, |
96ce2385 BD |
93 | .init_clocks = s3c244x_init_clocks, |
94 | .init_uarts = s3c244x_init_uarts, | |
1da177e4 LT |
95 | .init = s3c2440_init, |
96 | .name = name_s3c2440 | |
97 | }, | |
98 | { | |
99 | .idcode = 0x32440001, | |
100 | .idmask = 0xffffffff, | |
812c4e40 | 101 | .map_io = s3c2440_map_io, |
96ce2385 BD |
102 | .init_clocks = s3c244x_init_clocks, |
103 | .init_uarts = s3c244x_init_uarts, | |
1da177e4 LT |
104 | .init = s3c2440_init, |
105 | .name = name_s3c2440a | |
83f755f5 | 106 | }, |
96ce2385 BD |
107 | { |
108 | .idcode = 0x32440aaa, | |
109 | .idmask = 0xffffffff, | |
812c4e40 | 110 | .map_io = s3c2442_map_io, |
96ce2385 BD |
111 | .init_clocks = s3c244x_init_clocks, |
112 | .init_uarts = s3c244x_init_uarts, | |
113 | .init = s3c2442_init, | |
114 | .name = name_s3c2442 | |
115 | }, | |
f5fb9b1a HW |
116 | { |
117 | .idcode = 0x32440aab, | |
118 | .idmask = 0xffffffff, | |
812c4e40 | 119 | .map_io = s3c2442_map_io, |
f5fb9b1a HW |
120 | .init_clocks = s3c244x_init_clocks, |
121 | .init_uarts = s3c244x_init_uarts, | |
122 | .init = s3c2442_init, | |
123 | .name = name_s3c2442b | |
124 | }, | |
68d9ab39 BD |
125 | { |
126 | .idcode = 0x32412001, | |
127 | .idmask = 0xffffffff, | |
128 | .map_io = s3c2412_map_io, | |
129 | .init_clocks = s3c2412_init_clocks, | |
130 | .init_uarts = s3c2412_init_uarts, | |
131 | .init = s3c2412_init, | |
132 | .name = name_s3c2412, | |
133 | }, | |
d9bc55fa BD |
134 | { /* a newer version of the s3c2412 */ |
135 | .idcode = 0x32412003, | |
136 | .idmask = 0xffffffff, | |
137 | .map_io = s3c2412_map_io, | |
138 | .init_clocks = s3c2412_init_clocks, | |
139 | .init_uarts = s3c2412_init_uarts, | |
140 | .init = s3c2412_init, | |
141 | .name = name_s3c2412, | |
142 | }, | |
f1290a49 YK |
143 | { /* a strange version of the s3c2416 */ |
144 | .idcode = 0x32450003, | |
145 | .idmask = 0xffffffff, | |
146 | .map_io = s3c2416_map_io, | |
147 | .init_clocks = s3c2416_init_clocks, | |
148 | .init_uarts = s3c2416_init_uarts, | |
149 | .init = s3c2416_init, | |
150 | .name = name_s3c2416, | |
151 | }, | |
e4d06e39 BD |
152 | { |
153 | .idcode = 0x32443001, | |
154 | .idmask = 0xffffffff, | |
155 | .map_io = s3c2443_map_io, | |
156 | .init_clocks = s3c2443_init_clocks, | |
157 | .init_uarts = s3c2443_init_uarts, | |
158 | .init = s3c2443_init, | |
159 | .name = name_s3c2443, | |
160 | }, | |
1da177e4 LT |
161 | }; |
162 | ||
163 | /* minimal IO mapping */ | |
164 | ||
165 | static struct map_desc s3c_iodesc[] __initdata = { | |
166 | IODESC_ENT(GPIO), | |
167 | IODESC_ENT(IRQ), | |
168 | IODESC_ENT(MEMCTRL), | |
169 | IODESC_ENT(UART) | |
170 | }; | |
171 | ||
74b265d4 | 172 | /* read cpu identificaiton code */ |
1da177e4 | 173 | |
68d9ab39 BD |
174 | static unsigned long s3c24xx_read_idcode_v5(void) |
175 | { | |
d11a7d71 BD |
176 | #if defined(CONFIG_CPU_S3C2416) |
177 | /* s3c2416 is v5, with S3C24XX_GSTATUS1 instead of S3C2412_GSTATUS1 */ | |
178 | ||
179 | u32 gs = __raw_readl(S3C24XX_GSTATUS1); | |
180 | ||
181 | /* test for s3c2416 or similar device */ | |
182 | if ((gs >> 16) == 0x3245) | |
183 | return gs; | |
184 | #endif | |
185 | ||
68d9ab39 BD |
186 | #if defined(CONFIG_CPU_S3C2412) || defined(CONFIG_CPU_S3C2413) |
187 | return __raw_readl(S3C2412_GSTATUS1); | |
188 | #else | |
189 | return 1UL; /* don't look like an 2400 */ | |
190 | #endif | |
191 | } | |
192 | ||
193 | static unsigned long s3c24xx_read_idcode_v4(void) | |
194 | { | |
68d9ab39 | 195 | return __raw_readl(S3C2410_GSTATUS1); |
68d9ab39 BD |
196 | } |
197 | ||
92311272 NP |
198 | static void s3c24xx_default_idle(void) |
199 | { | |
200 | unsigned long tmp; | |
201 | int i; | |
202 | ||
203 | /* idle the system by using the idle mode which will wait for an | |
204 | * interrupt to happen before restarting the system. | |
205 | */ | |
206 | ||
207 | /* Warning: going into idle state upsets jtag scanning */ | |
208 | ||
209 | __raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE, | |
210 | S3C2410_CLKCON); | |
211 | ||
212 | /* the samsung port seems to do a loop and then unset idle.. */ | |
213 | for (i = 0; i < 50; i++) | |
214 | tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */ | |
215 | ||
216 | /* this bit is not cleared on re-start... */ | |
217 | ||
218 | __raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE, | |
219 | S3C2410_CLKCON); | |
220 | } | |
221 | ||
1da177e4 LT |
222 | void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) |
223 | { | |
92311272 NP |
224 | arm_pm_idle = s3c24xx_default_idle; |
225 | ||
1da177e4 | 226 | /* initialise the io descriptors we need for initialisation */ |
74b265d4 | 227 | iotable_init(mach_desc, size); |
1da177e4 LT |
228 | iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); |
229 | ||
68d9ab39 | 230 | if (cpu_architecture() >= CPU_ARCH_ARMv5) { |
c06af3cc | 231 | samsung_cpu_id = s3c24xx_read_idcode_v5(); |
68d9ab39 | 232 | } else { |
c06af3cc | 233 | samsung_cpu_id = s3c24xx_read_idcode_v4(); |
68d9ab39 | 234 | } |
e6d1cb9f | 235 | s3c24xx_init_cpu(); |
83f755f5 | 236 | |
c06af3cc | 237 | s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids)); |
66a9b49a | 238 | } |
618ae08a HS |
239 | |
240 | /* Serial port registrations */ | |
241 | ||
242 | static struct resource s3c2410_uart0_resource[] = { | |
99dbdd98 TB |
243 | [0] = DEFINE_RES_MEM(S3C2410_PA_UART0, SZ_16K), |
244 | [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX0, \ | |
245 | IRQ_S3CUART_ERR0 - IRQ_S3CUART_RX0 + 1, \ | |
246 | NULL, IORESOURCE_IRQ) | |
618ae08a HS |
247 | }; |
248 | ||
249 | static struct resource s3c2410_uart1_resource[] = { | |
99dbdd98 TB |
250 | [0] = DEFINE_RES_MEM(S3C2410_PA_UART1, SZ_16K), |
251 | [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX1, \ | |
252 | IRQ_S3CUART_ERR1 - IRQ_S3CUART_RX1 + 1, \ | |
253 | NULL, IORESOURCE_IRQ) | |
618ae08a HS |
254 | }; |
255 | ||
256 | static struct resource s3c2410_uart2_resource[] = { | |
99dbdd98 TB |
257 | [0] = DEFINE_RES_MEM(S3C2410_PA_UART2, SZ_16K), |
258 | [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX2, \ | |
259 | IRQ_S3CUART_ERR2 - IRQ_S3CUART_RX2 + 1, \ | |
260 | NULL, IORESOURCE_IRQ) | |
618ae08a HS |
261 | }; |
262 | ||
263 | static struct resource s3c2410_uart3_resource[] = { | |
99dbdd98 TB |
264 | [0] = DEFINE_RES_MEM(S3C2443_PA_UART3, SZ_16K), |
265 | [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX3, \ | |
266 | IRQ_S3CUART_ERR3 - IRQ_S3CUART_RX3 + 1, \ | |
267 | NULL, IORESOURCE_IRQ) | |
618ae08a HS |
268 | }; |
269 | ||
270 | struct s3c24xx_uart_resources s3c2410_uart_resources[] __initdata = { | |
271 | [0] = { | |
272 | .resources = s3c2410_uart0_resource, | |
273 | .nr_resources = ARRAY_SIZE(s3c2410_uart0_resource), | |
274 | }, | |
275 | [1] = { | |
276 | .resources = s3c2410_uart1_resource, | |
277 | .nr_resources = ARRAY_SIZE(s3c2410_uart1_resource), | |
278 | }, | |
279 | [2] = { | |
280 | .resources = s3c2410_uart2_resource, | |
281 | .nr_resources = ARRAY_SIZE(s3c2410_uart2_resource), | |
282 | }, | |
283 | [3] = { | |
284 | .resources = s3c2410_uart3_resource, | |
285 | .nr_resources = ARRAY_SIZE(s3c2410_uart3_resource), | |
286 | }, | |
287 | }; | |
2473f713 HS |
288 | |
289 | /* initialise all the clocks */ | |
290 | ||
291 | void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk, | |
292 | unsigned long hclk, | |
293 | unsigned long pclk) | |
294 | { | |
295 | clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON), | |
296 | clk_xtal.rate); | |
297 | ||
298 | clk_mpll.rate = fclk; | |
299 | clk_h.rate = hclk; | |
300 | clk_p.rate = pclk; | |
301 | clk_f.rate = fclk; | |
302 | } |