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>
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>
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>
46 #include <plat/regs-serial.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
,
69 .name
= name_exynos4210
,
71 .idcode
= EXYNOS4212_CPU_ID
,
72 .idmask
= EXYNOS4_CPU_MASK
,
73 .map_io
= exynos4_map_io
,
75 .name
= name_exynos4212
,
77 .idcode
= EXYNOS4412_CPU_ID
,
78 .idmask
= EXYNOS4_CPU_MASK
,
79 .map_io
= exynos4_map_io
,
81 .name
= name_exynos4412
,
83 .idcode
= EXYNOS5250_SOC_ID
,
84 .idmask
= EXYNOS5_SOC_MASK
,
85 .map_io
= exynos5_map_io
,
87 .name
= name_exynos5250
,
89 .idcode
= EXYNOS5420_SOC_ID
,
90 .idmask
= EXYNOS5_SOC_MASK
,
91 .map_io
= exynos5_map_io
,
93 .name
= name_exynos5420
,
95 .idcode
= EXYNOS5440_SOC_ID
,
96 .idmask
= EXYNOS5_SOC_MASK
,
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
),
111 .virtual = (unsigned long)S3C_VA_TIMER
,
112 .pfn
= __phys_to_pfn(EXYNOS4_PA_TIMER
),
116 .virtual = (unsigned long)S3C_VA_WATCHDOG
,
117 .pfn
= __phys_to_pfn(EXYNOS4_PA_WATCHDOG
),
121 .virtual = (unsigned long)S5P_VA_SROMC
,
122 .pfn
= __phys_to_pfn(EXYNOS4_PA_SROMC
),
126 .virtual = (unsigned long)S5P_VA_SYSTIMER
,
127 .pfn
= __phys_to_pfn(EXYNOS4_PA_SYSTIMER
),
131 .virtual = (unsigned long)S5P_VA_PMU
,
132 .pfn
= __phys_to_pfn(EXYNOS4_PA_PMU
),
136 .virtual = (unsigned long)S5P_VA_COMBINER_BASE
,
137 .pfn
= __phys_to_pfn(EXYNOS4_PA_COMBINER
),
141 .virtual = (unsigned long)S5P_VA_GIC_CPU
,
142 .pfn
= __phys_to_pfn(EXYNOS4_PA_GIC_CPU
),
146 .virtual = (unsigned long)S5P_VA_GIC_DIST
,
147 .pfn
= __phys_to_pfn(EXYNOS4_PA_GIC_DIST
),
151 .virtual = (unsigned long)S5P_VA_CMU
,
152 .pfn
= __phys_to_pfn(EXYNOS4_PA_CMU
),
156 .virtual = (unsigned long)S5P_VA_COREPERI_BASE
,
157 .pfn
= __phys_to_pfn(EXYNOS4_PA_COREPERI
),
161 .virtual = (unsigned long)S5P_VA_L2CC
,
162 .pfn
= __phys_to_pfn(EXYNOS4_PA_L2CC
),
166 .virtual = (unsigned long)S5P_VA_DMC0
,
167 .pfn
= __phys_to_pfn(EXYNOS4_PA_DMC0
),
171 .virtual = (unsigned long)S5P_VA_DMC1
,
172 .pfn
= __phys_to_pfn(EXYNOS4_PA_DMC1
),
176 .virtual = (unsigned long)S3C_VA_USB_HSPHY
,
177 .pfn
= __phys_to_pfn(EXYNOS4_PA_HSPHY
),
183 static struct map_desc exynos4_iodesc0
[] __initdata
= {
185 .virtual = (unsigned long)S5P_VA_SYSRAM
,
186 .pfn
= __phys_to_pfn(EXYNOS4_PA_SYSRAM0
),
192 static struct map_desc exynos4_iodesc1
[] __initdata
= {
194 .virtual = (unsigned long)S5P_VA_SYSRAM
,
195 .pfn
= __phys_to_pfn(EXYNOS4_PA_SYSRAM1
),
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
),
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
),
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
),
228 static struct map_desc exynos5_iodesc
[] __initdata
= {
230 .virtual = (unsigned long)S3C_VA_SYS
,
231 .pfn
= __phys_to_pfn(EXYNOS5_PA_SYSCON
),
235 .virtual = (unsigned long)S3C_VA_TIMER
,
236 .pfn
= __phys_to_pfn(EXYNOS5_PA_TIMER
),
240 .virtual = (unsigned long)S3C_VA_WATCHDOG
,
241 .pfn
= __phys_to_pfn(EXYNOS5_PA_WATCHDOG
),
245 .virtual = (unsigned long)S5P_VA_SROMC
,
246 .pfn
= __phys_to_pfn(EXYNOS5_PA_SROMC
),
250 .virtual = (unsigned long)S5P_VA_SYSRAM
,
251 .pfn
= __phys_to_pfn(EXYNOS5_PA_SYSRAM
),
255 .virtual = (unsigned long)S5P_VA_CMU
,
256 .pfn
= __phys_to_pfn(EXYNOS5_PA_CMU
),
257 .length
= 144 * SZ_1K
,
260 .virtual = (unsigned long)S5P_VA_PMU
,
261 .pfn
= __phys_to_pfn(EXYNOS5_PA_PMU
),
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
;
279 addr
= EXYNOS_SWRESET
;
281 if (of_machine_is_compatible("samsung,exynos5440")) {
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 */
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
;
313 if (!of_flat_dt_is_compatible(node
, "samsung,exynos4210-chipid") &&
314 !of_flat_dt_is_compatible(node
, "samsung,exynos5440-clock"))
317 reg
= of_get_flat_dt_prop(node
, "reg", &len
);
318 if (reg
== NULL
|| len
!= (sizeof(unsigned long) * 2))
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);
332 * register the standard cpu IO areas
335 void __init
exynos_init_io(void)
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
));
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)
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)
395 ret
= l2x0_of_init(L2_AUX_VAL
, L2_AUX_MASK
);
399 l2x0_regs_phys
= virt_to_phys(&l2x0_saved_regs
);
400 clean_dcache_area(&l2x0_regs_phys
, sizeof(unsigned long));
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
);