Merge branch 'late/fixes' into fixes
[linux-2.6-block.git] / arch / arm / mach-s3c24xx / common.c
CommitLineData
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>
2473f713
HS
50#include <plat/cpu-freq.h>
51#include <plat/pll.h>
1da177e4 52
e1a621da
HS
53#include "common.h"
54
1da177e4
LT
55/* table of supported CPUs */
56
57static const char name_s3c2410[] = "S3C2410";
68d9ab39 58static const char name_s3c2412[] = "S3C2412";
63b1f51b 59static const char name_s3c2416[] = "S3C2416/S3C2450";
1da177e4 60static const char name_s3c2440[] = "S3C2440";
96ce2385 61static const char name_s3c2442[] = "S3C2442";
f5fb9b1a 62static const char name_s3c2442b[] = "S3C2442B";
e4d06e39 63static const char name_s3c2443[] = "S3C2443";
1da177e4
LT
64static const char name_s3c2410a[] = "S3C2410A";
65static const char name_s3c2440a[] = "S3C2440A";
66
67static 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
162static 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
171static 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
190static unsigned long s3c24xx_read_idcode_v4(void)
191{
68d9ab39 192 return __raw_readl(S3C2410_GSTATUS1);
68d9ab39
BD
193}
194
92311272
NP
195static void s3c24xx_default_idle(void)
196{
813f13e7 197 unsigned long tmp = 0;
92311272
NP
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
219void __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}
618ae08a
HS
236
237/* Serial port registrations */
238
9ee51f01
AB
239#define S3C2410_PA_UART0 (S3C24XX_PA_UART)
240#define S3C2410_PA_UART1 (S3C24XX_PA_UART + 0x4000 )
241#define S3C2410_PA_UART2 (S3C24XX_PA_UART + 0x8000 )
242#define S3C2443_PA_UART3 (S3C24XX_PA_UART + 0xC000 )
243
618ae08a 244static struct resource s3c2410_uart0_resource[] = {
99dbdd98
TB
245 [0] = DEFINE_RES_MEM(S3C2410_PA_UART0, SZ_16K),
246 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX0, \
247 IRQ_S3CUART_ERR0 - IRQ_S3CUART_RX0 + 1, \
248 NULL, IORESOURCE_IRQ)
618ae08a
HS
249};
250
251static struct resource s3c2410_uart1_resource[] = {
99dbdd98
TB
252 [0] = DEFINE_RES_MEM(S3C2410_PA_UART1, SZ_16K),
253 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX1, \
254 IRQ_S3CUART_ERR1 - IRQ_S3CUART_RX1 + 1, \
255 NULL, IORESOURCE_IRQ)
618ae08a
HS
256};
257
258static struct resource s3c2410_uart2_resource[] = {
99dbdd98
TB
259 [0] = DEFINE_RES_MEM(S3C2410_PA_UART2, SZ_16K),
260 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX2, \
261 IRQ_S3CUART_ERR2 - IRQ_S3CUART_RX2 + 1, \
262 NULL, IORESOURCE_IRQ)
618ae08a
HS
263};
264
265static struct resource s3c2410_uart3_resource[] = {
99dbdd98
TB
266 [0] = DEFINE_RES_MEM(S3C2443_PA_UART3, SZ_16K),
267 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX3, \
268 IRQ_S3CUART_ERR3 - IRQ_S3CUART_RX3 + 1, \
269 NULL, IORESOURCE_IRQ)
618ae08a
HS
270};
271
272struct s3c24xx_uart_resources s3c2410_uart_resources[] __initdata = {
273 [0] = {
274 .resources = s3c2410_uart0_resource,
275 .nr_resources = ARRAY_SIZE(s3c2410_uart0_resource),
276 },
277 [1] = {
278 .resources = s3c2410_uart1_resource,
279 .nr_resources = ARRAY_SIZE(s3c2410_uart1_resource),
280 },
281 [2] = {
282 .resources = s3c2410_uart2_resource,
283 .nr_resources = ARRAY_SIZE(s3c2410_uart2_resource),
284 },
285 [3] = {
286 .resources = s3c2410_uart3_resource,
287 .nr_resources = ARRAY_SIZE(s3c2410_uart3_resource),
288 },
289};
2473f713
HS
290
291/* initialise all the clocks */
292
293void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk,
294 unsigned long hclk,
295 unsigned long pclk)
296{
297 clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON),
298 clk_xtal.rate);
299
300 clk_mpll.rate = fclk;
301 clk_h.rate = hclk;
302 clk_p.rate = pclk;
303 clk_f.rate = fclk;
304}