tty: serial/samsung: make register definitions global
[deliverable/linux.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>
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
60static const char name_s3c2410[] = "S3C2410";
68d9ab39 61static const char name_s3c2412[] = "S3C2412";
63b1f51b 62static const char name_s3c2416[] = "S3C2416/S3C2450";
1da177e4 63static const char name_s3c2440[] = "S3C2440";
96ce2385 64static const char name_s3c2442[] = "S3C2442";
f5fb9b1a 65static const char name_s3c2442b[] = "S3C2442B";
e4d06e39 66static const char name_s3c2443[] = "S3C2443";
1da177e4
LT
67static const char name_s3c2410a[] = "S3C2410A";
68static const char name_s3c2440a[] = "S3C2440A";
69
70static 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
165static 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
174static 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
193static unsigned long s3c24xx_read_idcode_v4(void)
194{
68d9ab39 195 return __raw_readl(S3C2410_GSTATUS1);
68d9ab39
BD
196}
197
92311272
NP
198static void s3c24xx_default_idle(void)
199{
813f13e7 200 unsigned long tmp = 0;
92311272
NP
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
222void __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
9ee51f01
AB
242#define S3C2410_PA_UART0 (S3C24XX_PA_UART)
243#define S3C2410_PA_UART1 (S3C24XX_PA_UART + 0x4000 )
244#define S3C2410_PA_UART2 (S3C24XX_PA_UART + 0x8000 )
245#define S3C2443_PA_UART3 (S3C24XX_PA_UART + 0xC000 )
246
618ae08a 247static struct resource s3c2410_uart0_resource[] = {
99dbdd98
TB
248 [0] = DEFINE_RES_MEM(S3C2410_PA_UART0, SZ_16K),
249 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX0, \
250 IRQ_S3CUART_ERR0 - IRQ_S3CUART_RX0 + 1, \
251 NULL, IORESOURCE_IRQ)
618ae08a
HS
252};
253
254static struct resource s3c2410_uart1_resource[] = {
99dbdd98
TB
255 [0] = DEFINE_RES_MEM(S3C2410_PA_UART1, SZ_16K),
256 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX1, \
257 IRQ_S3CUART_ERR1 - IRQ_S3CUART_RX1 + 1, \
258 NULL, IORESOURCE_IRQ)
618ae08a
HS
259};
260
261static struct resource s3c2410_uart2_resource[] = {
99dbdd98
TB
262 [0] = DEFINE_RES_MEM(S3C2410_PA_UART2, SZ_16K),
263 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX2, \
264 IRQ_S3CUART_ERR2 - IRQ_S3CUART_RX2 + 1, \
265 NULL, IORESOURCE_IRQ)
618ae08a
HS
266};
267
268static struct resource s3c2410_uart3_resource[] = {
99dbdd98
TB
269 [0] = DEFINE_RES_MEM(S3C2443_PA_UART3, SZ_16K),
270 [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX3, \
271 IRQ_S3CUART_ERR3 - IRQ_S3CUART_RX3 + 1, \
272 NULL, IORESOURCE_IRQ)
618ae08a
HS
273};
274
275struct s3c24xx_uart_resources s3c2410_uart_resources[] __initdata = {
276 [0] = {
277 .resources = s3c2410_uart0_resource,
278 .nr_resources = ARRAY_SIZE(s3c2410_uart0_resource),
279 },
280 [1] = {
281 .resources = s3c2410_uart1_resource,
282 .nr_resources = ARRAY_SIZE(s3c2410_uart1_resource),
283 },
284 [2] = {
285 .resources = s3c2410_uart2_resource,
286 .nr_resources = ARRAY_SIZE(s3c2410_uart2_resource),
287 },
288 [3] = {
289 .resources = s3c2410_uart3_resource,
290 .nr_resources = ARRAY_SIZE(s3c2410_uart3_resource),
291 },
292};
2473f713
HS
293
294/* initialise all the clocks */
295
296void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk,
297 unsigned long hclk,
298 unsigned long pclk)
299{
300 clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON),
301 clk_xtal.rate);
302
303 clk_mpll.rate = fclk;
304 clk_h.rate = hclk;
305 clk_p.rate = pclk;
306 clk_f.rate = fclk;
307}
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