Linux 3.11-rc3
[cris-mirror.git] / arch / arm / mach-exynos / common.c
blobba95e5db25011a0801c2ef1f7c27270b713280ee
1 /*
2 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
5 * Common Codes for EXYNOS
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/bitops.h>
14 #include <linux/interrupt.h>
15 #include <linux/irq.h>
16 #include <linux/irqchip.h>
17 #include <linux/io.h>
18 #include <linux/device.h>
19 #include <linux/gpio.h>
20 #include <clocksource/samsung_pwm.h>
21 #include <linux/sched.h>
22 #include <linux/serial_core.h>
23 #include <linux/of.h>
24 #include <linux/of_fdt.h>
25 #include <linux/of_irq.h>
26 #include <linux/export.h>
27 #include <linux/irqdomain.h>
28 #include <linux/of_address.h>
29 #include <linux/clocksource.h>
30 #include <linux/clk-provider.h>
31 #include <linux/irqchip/arm-gic.h>
32 #include <linux/irqchip/chained_irq.h>
34 #include <asm/proc-fns.h>
35 #include <asm/exception.h>
36 #include <asm/hardware/cache-l2x0.h>
37 #include <asm/mach/map.h>
38 #include <asm/mach/irq.h>
39 #include <asm/cacheflush.h>
41 #include <mach/regs-irq.h>
42 #include <mach/regs-pmu.h>
44 #include <plat/cpu.h>
45 #include <plat/pm.h>
46 #include <plat/regs-serial.h>
48 #include "common.h"
49 #define L2_AUX_VAL 0x7C470001
50 #define L2_AUX_MASK 0xC200ffff
52 static const char name_exynos4210[] = "EXYNOS4210";
53 static const char name_exynos4212[] = "EXYNOS4212";
54 static const char name_exynos4412[] = "EXYNOS4412";
55 static const char name_exynos5250[] = "EXYNOS5250";
56 static const char name_exynos5420[] = "EXYNOS5420";
57 static const char name_exynos5440[] = "EXYNOS5440";
59 static void exynos4_map_io(void);
60 static void exynos5_map_io(void);
61 static int exynos_init(void);
63 static struct cpu_table cpu_ids[] __initdata = {
65 .idcode = EXYNOS4210_CPU_ID,
66 .idmask = EXYNOS4_CPU_MASK,
67 .map_io = exynos4_map_io,
68 .init = exynos_init,
69 .name = name_exynos4210,
70 }, {
71 .idcode = EXYNOS4212_CPU_ID,
72 .idmask = EXYNOS4_CPU_MASK,
73 .map_io = exynos4_map_io,
74 .init = exynos_init,
75 .name = name_exynos4212,
76 }, {
77 .idcode = EXYNOS4412_CPU_ID,
78 .idmask = EXYNOS4_CPU_MASK,
79 .map_io = exynos4_map_io,
80 .init = exynos_init,
81 .name = name_exynos4412,
82 }, {
83 .idcode = EXYNOS5250_SOC_ID,
84 .idmask = EXYNOS5_SOC_MASK,
85 .map_io = exynos5_map_io,
86 .init = exynos_init,
87 .name = name_exynos5250,
88 }, {
89 .idcode = EXYNOS5420_SOC_ID,
90 .idmask = EXYNOS5_SOC_MASK,
91 .map_io = exynos5_map_io,
92 .init = exynos_init,
93 .name = name_exynos5420,
94 }, {
95 .idcode = EXYNOS5440_SOC_ID,
96 .idmask = EXYNOS5_SOC_MASK,
97 .init = exynos_init,
98 .name = name_exynos5440,
102 /* Initial IO mappings */
104 static struct map_desc exynos4_iodesc[] __initdata = {
106 .virtual = (unsigned long)S3C_VA_SYS,
107 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
108 .length = SZ_64K,
109 .type = MT_DEVICE,
110 }, {
111 .virtual = (unsigned long)S3C_VA_TIMER,
112 .pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
113 .length = SZ_16K,
114 .type = MT_DEVICE,
115 }, {
116 .virtual = (unsigned long)S3C_VA_WATCHDOG,
117 .pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
118 .length = SZ_4K,
119 .type = MT_DEVICE,
120 }, {
121 .virtual = (unsigned long)S5P_VA_SROMC,
122 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
123 .length = SZ_4K,
124 .type = MT_DEVICE,
125 }, {
126 .virtual = (unsigned long)S5P_VA_SYSTIMER,
127 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
128 .length = SZ_4K,
129 .type = MT_DEVICE,
130 }, {
131 .virtual = (unsigned long)S5P_VA_PMU,
132 .pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
133 .length = SZ_64K,
134 .type = MT_DEVICE,
135 }, {
136 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
137 .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
138 .length = SZ_4K,
139 .type = MT_DEVICE,
140 }, {
141 .virtual = (unsigned long)S5P_VA_GIC_CPU,
142 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
143 .length = SZ_64K,
144 .type = MT_DEVICE,
145 }, {
146 .virtual = (unsigned long)S5P_VA_GIC_DIST,
147 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
148 .length = SZ_64K,
149 .type = MT_DEVICE,
150 }, {
151 .virtual = (unsigned long)S5P_VA_CMU,
152 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
153 .length = SZ_128K,
154 .type = MT_DEVICE,
155 }, {
156 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
157 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
158 .length = SZ_8K,
159 .type = MT_DEVICE,
160 }, {
161 .virtual = (unsigned long)S5P_VA_L2CC,
162 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
163 .length = SZ_4K,
164 .type = MT_DEVICE,
165 }, {
166 .virtual = (unsigned long)S5P_VA_DMC0,
167 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
168 .length = SZ_64K,
169 .type = MT_DEVICE,
170 }, {
171 .virtual = (unsigned long)S5P_VA_DMC1,
172 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
173 .length = SZ_64K,
174 .type = MT_DEVICE,
175 }, {
176 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
177 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
178 .length = SZ_4K,
179 .type = MT_DEVICE,
183 static struct map_desc exynos4_iodesc0[] __initdata = {
185 .virtual = (unsigned long)S5P_VA_SYSRAM,
186 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
187 .length = SZ_4K,
188 .type = MT_DEVICE,
192 static struct map_desc exynos4_iodesc1[] __initdata = {
194 .virtual = (unsigned long)S5P_VA_SYSRAM,
195 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
196 .length = SZ_4K,
197 .type = MT_DEVICE,
201 static struct map_desc exynos4210_iodesc[] __initdata = {
203 .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
204 .pfn = __phys_to_pfn(EXYNOS4210_PA_SYSRAM_NS),
205 .length = SZ_4K,
206 .type = MT_DEVICE,
210 static struct map_desc exynos4x12_iodesc[] __initdata = {
212 .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
213 .pfn = __phys_to_pfn(EXYNOS4x12_PA_SYSRAM_NS),
214 .length = SZ_4K,
215 .type = MT_DEVICE,
219 static struct map_desc exynos5250_iodesc[] __initdata = {
221 .virtual = (unsigned long)S5P_VA_SYSRAM_NS,
222 .pfn = __phys_to_pfn(EXYNOS5250_PA_SYSRAM_NS),
223 .length = SZ_4K,
224 .type = MT_DEVICE,
228 static struct map_desc exynos5_iodesc[] __initdata = {
230 .virtual = (unsigned long)S3C_VA_SYS,
231 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
232 .length = SZ_64K,
233 .type = MT_DEVICE,
234 }, {
235 .virtual = (unsigned long)S3C_VA_TIMER,
236 .pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
237 .length = SZ_16K,
238 .type = MT_DEVICE,
239 }, {
240 .virtual = (unsigned long)S3C_VA_WATCHDOG,
241 .pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
242 .length = SZ_4K,
243 .type = MT_DEVICE,
244 }, {
245 .virtual = (unsigned long)S5P_VA_SROMC,
246 .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
247 .length = SZ_4K,
248 .type = MT_DEVICE,
249 }, {
250 .virtual = (unsigned long)S5P_VA_SYSRAM,
251 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
252 .length = SZ_4K,
253 .type = MT_DEVICE,
254 }, {
255 .virtual = (unsigned long)S5P_VA_CMU,
256 .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
257 .length = 144 * SZ_1K,
258 .type = MT_DEVICE,
259 }, {
260 .virtual = (unsigned long)S5P_VA_PMU,
261 .pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
262 .length = SZ_64K,
263 .type = MT_DEVICE,
267 void exynos4_restart(enum reboot_mode mode, const char *cmd)
269 __raw_writel(0x1, S5P_SWRESET);
272 void exynos5_restart(enum reboot_mode mode, const char *cmd)
274 struct device_node *np;
275 u32 val;
276 void __iomem *addr;
278 val = 0x1;
279 addr = EXYNOS_SWRESET;
281 if (of_machine_is_compatible("samsung,exynos5440")) {
282 u32 status;
283 np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
285 addr = of_iomap(np, 0) + 0xbc;
286 status = __raw_readl(addr);
288 addr = of_iomap(np, 0) + 0xcc;
289 val = __raw_readl(addr);
291 val = (val & 0xffff0000) | (status & 0xffff);
294 __raw_writel(val, addr);
297 void __init exynos_init_late(void)
299 if (of_machine_is_compatible("samsung,exynos5440"))
300 /* to be supported later */
301 return;
303 exynos_pm_late_initcall();
306 static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
307 int depth, void *data)
309 struct map_desc iodesc;
310 __be32 *reg;
311 unsigned long len;
313 if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
314 !of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
315 return 0;
317 reg = of_get_flat_dt_prop(node, "reg", &len);
318 if (reg == NULL || len != (sizeof(unsigned long) * 2))
319 return 0;
321 iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
322 iodesc.length = be32_to_cpu(reg[1]) - 1;
323 iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
324 iodesc.type = MT_DEVICE;
325 iotable_init(&iodesc, 1);
326 return 1;
330 * exynos_map_io
332 * register the standard cpu IO areas
335 void __init exynos_init_io(void)
337 debug_ll_io_init();
339 of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
341 /* detect cpu id and rev. */
342 s5p_init_cpu(S5P_VA_CHIPID);
344 s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
347 static void __init exynos4_map_io(void)
349 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
351 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
352 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
353 else
354 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
356 if (soc_is_exynos4210())
357 iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
358 if (soc_is_exynos4212() || soc_is_exynos4412())
359 iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
362 static void __init exynos5_map_io(void)
364 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
366 if (soc_is_exynos5250())
367 iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
370 void __init exynos_init_time(void)
372 of_clk_init(NULL);
373 clocksource_of_init();
376 struct bus_type exynos_subsys = {
377 .name = "exynos-core",
378 .dev_name = "exynos-core",
381 static struct device exynos4_dev = {
382 .bus = &exynos_subsys,
385 static int __init exynos_core_init(void)
387 return subsys_system_register(&exynos_subsys, NULL);
389 core_initcall(exynos_core_init);
391 static int __init exynos4_l2x0_cache_init(void)
393 int ret;
395 ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
396 if (ret)
397 return ret;
399 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
400 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
401 return 0;
403 early_initcall(exynos4_l2x0_cache_init);
405 static int __init exynos_init(void)
407 printk(KERN_INFO "EXYNOS: Initializing architecture\n");
409 return device_register(&exynos4_dev);