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-rw-r--r--arch/arm/mach-exynos/cpu.c298
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diff --git a/arch/arm/mach-exynos/cpu.c b/arch/arm/mach-exynos/cpu.c
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1/* linux/arch/arm/mach-exynos/cpu.c
2 *
3 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9*/
10
11#include <linux/sched.h>
12#include <linux/sysdev.h>
13
14#include <asm/mach/map.h>
15#include <asm/mach/irq.h>
16
17#include <asm/proc-fns.h>
18#include <asm/hardware/cache-l2x0.h>
19#include <asm/hardware/gic.h>
20
21#include <plat/cpu.h>
22#include <plat/clock.h>
23#include <plat/devs.h>
24#include <plat/exynos4.h>
25#include <plat/adc-core.h>
26#include <plat/sdhci.h>
27#include <plat/fb-core.h>
28#include <plat/fimc-core.h>
29#include <plat/iic-core.h>
30#include <plat/reset.h>
31#include <plat/tv-core.h>
32
33#include <mach/regs-irq.h>
34#include <mach/regs-pmu.h>
35
36unsigned int gic_bank_offset __read_mostly;
37
38extern int combiner_init(unsigned int combiner_nr, void __iomem *base,
39 unsigned int irq_start);
40extern void combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq);
41
42/* Initial IO mappings */
43static struct map_desc exynos_iodesc[] __initdata = {
44 {
45 .virtual = (unsigned long)S5P_VA_SYSTIMER,
46 .pfn = __phys_to_pfn(EXYNOS_PA_SYSTIMER),
47 .length = SZ_4K,
48 .type = MT_DEVICE,
49 }, {
50 .virtual = (unsigned long)S5P_VA_PMU,
51 .pfn = __phys_to_pfn(EXYNOS_PA_PMU),
52 .length = SZ_64K,
53 .type = MT_DEVICE,
54 }, {
55 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
56 .pfn = __phys_to_pfn(EXYNOS_PA_COMBINER),
57 .length = SZ_4K,
58 .type = MT_DEVICE,
59 }, {
60 .virtual = (unsigned long)S5P_VA_GIC_CPU,
61 .pfn = __phys_to_pfn(EXYNOS_PA_GIC_CPU),
62 .length = SZ_64K,
63 .type = MT_DEVICE,
64 }, {
65 .virtual = (unsigned long)S5P_VA_GIC_DIST,
66 .pfn = __phys_to_pfn(EXYNOS_PA_GIC_DIST),
67 .length = SZ_64K,
68 .type = MT_DEVICE,
69 }, {
70 .virtual = (unsigned long)S3C_VA_UART,
71 .pfn = __phys_to_pfn(S3C_PA_UART),
72 .length = SZ_512K,
73 .type = MT_DEVICE,
74 },
75};
76
77static struct map_desc exynos4_iodesc[] __initdata = {
78 {
79 .virtual = (unsigned long)S5P_VA_CMU,
80 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
81 .length = SZ_128K,
82 .type = MT_DEVICE,
83 }, {
84 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
85 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
86 .length = SZ_8K,
87 .type = MT_DEVICE,
88 }, {
89 .virtual = (unsigned long)S5P_VA_L2CC,
90 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
91 .length = SZ_4K,
92 .type = MT_DEVICE,
93 }, {
94 .virtual = (unsigned long)S5P_VA_GPIO1,
95 .pfn = __phys_to_pfn(EXYNOS4_PA_GPIO1),
96 .length = SZ_4K,
97 .type = MT_DEVICE,
98 }, {
99 .virtual = (unsigned long)S5P_VA_GPIO2,
100 .pfn = __phys_to_pfn(EXYNOS4_PA_GPIO2),
101 .length = SZ_4K,
102 .type = MT_DEVICE,
103 }, {
104 .virtual = (unsigned long)S5P_VA_GPIO3,
105 .pfn = __phys_to_pfn(EXYNOS4_PA_GPIO3),
106 .length = SZ_256,
107 .type = MT_DEVICE,
108 }, {
109 .virtual = (unsigned long)S5P_VA_DMC0,
110 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
111 .length = SZ_4K,
112 .type = MT_DEVICE,
113 }, {
114 .virtual = (unsigned long)S5P_VA_SROMC,
115 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
116 .length = SZ_4K,
117 .type = MT_DEVICE,
118 }, {
119 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
120 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
121 .length = SZ_4K,
122 .type = MT_DEVICE,
123 },
124};
125
126static struct map_desc exynos4_iodesc0[] __initdata = {
127 {
128 .virtual = (unsigned long)S5P_VA_SYSRAM,
129 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
130 .length = SZ_4K,
131 .type = MT_DEVICE,
132 },
133};
134
135static struct map_desc exynos4_iodesc1[] __initdata = {
136 {
137 .virtual = (unsigned long)S5P_VA_SYSRAM,
138 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
139 .length = SZ_4K,
140 .type = MT_DEVICE,
141 },
142};
143
144static void exynos_idle(void)
145{
146 if (!need_resched())
147 cpu_do_idle();
148
149 local_irq_enable();
150}
151
152static void exynos4_sw_reset(void)
153{
154 __raw_writel(0x1, S5P_SWRESET);
155}
156
157/*
158 * exynos_map_io
159 *
160 * register the standard cpu IO areas
161 */
162void __init exynos4_map_io(void)
163{
164 iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));
165 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
166
167 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
168 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
169 else
170 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
171
172 /* initialize device information early */
173 exynos4_default_sdhci0();
174 exynos4_default_sdhci1();
175 exynos4_default_sdhci2();
176 exynos4_default_sdhci3();
177
178 s3c_adc_setname("samsung-adc-v3");
179
180 s3c_fimc_setname(0, "exynos4-fimc");
181 s3c_fimc_setname(1, "exynos4-fimc");
182 s3c_fimc_setname(2, "exynos4-fimc");
183 s3c_fimc_setname(3, "exynos4-fimc");
184
185 /* The I2C bus controllers are directly compatible with s3c2440 */
186 s3c_i2c0_setname("s3c2440-i2c");
187 s3c_i2c1_setname("s3c2440-i2c");
188 s3c_i2c2_setname("s3c2440-i2c");
189
190 s5p_fb_setname(0, "exynos4-fb");
191 s5p_hdmi_setname("exynos4-hdmi");
192}
193
194void __init exynos4_init_clocks(int xtal)
195{
196 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
197
198 s3c24xx_register_baseclocks(xtal);
199 s5p_register_clocks(xtal);
200
201 if (soc_is_exynos4210())
202 exynos4210_register_clocks();
203 else if (soc_is_exynos4212() || soc_is_exynos4412())
204 exynos4212_register_clocks();
205
206 exynos4_register_clocks();
207 exynos4_setup_clocks();
208}
209
210static void exynos4_gic_irq_fix_base(struct irq_data *d)
211{
212 struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
213
214 gic_data->cpu_base = S5P_VA_GIC_CPU +
215 (gic_bank_offset * smp_processor_id());
216
217 gic_data->dist_base = S5P_VA_GIC_DIST +
218 (gic_bank_offset * smp_processor_id());
219}
220
221void __init exynos4_init_irq(void)
222{
223 int irq;
224
225 gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
226
227 gic_init(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
228 gic_arch_extn.irq_eoi = exynos4_gic_irq_fix_base;
229 gic_arch_extn.irq_unmask = exynos4_gic_irq_fix_base;
230 gic_arch_extn.irq_mask = exynos4_gic_irq_fix_base;
231
232 for (irq = 0; irq < MAX_COMBINER_NR; irq++) {
233
234 combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
235 COMBINER_IRQ(irq, 0));
236 combiner_cascade_irq(irq, IRQ_SPI(irq));
237 }
238
239 /* The parameters of s5p_init_irq() are for VIC init.
240 * Theses parameters should be NULL and 0 because EXYNOS4
241 * uses GIC instead of VIC.
242 */
243 s5p_init_irq(NULL, 0);
244}
245
246struct sysdev_class exynos4_sysclass = {
247 .name = "exynos4-core",
248};
249
250static struct sys_device exynos4_sysdev = {
251 .cls = &exynos4_sysclass,
252};
253
254static int __init exynos4_core_init(void)
255{
256 return sysdev_class_register(&exynos4_sysclass);
257}
258core_initcall(exynos4_core_init);
259
260#ifdef CONFIG_CACHE_L2X0
261static int __init exynos4_l2x0_cache_init(void)
262{
263 /* TAG, Data Latency Control: 2cycle */
264 __raw_writel(0x110, S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
265
266 if (soc_is_exynos4210())
267 __raw_writel(0x110, S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
268 else if (soc_is_exynos4212() || soc_is_exynos4412())
269 __raw_writel(0x120, S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
270
271 /* L2X0 Prefetch Control */
272 __raw_writel(0x30000007, S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
273
274 /* L2X0 Power Control */
275 __raw_writel(L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN,
276 S5P_VA_L2CC + L2X0_POWER_CTRL);
277
278 l2x0_init(S5P_VA_L2CC, 0x7C470001, 0xC200ffff);
279
280 return 0;
281}
282
283early_initcall(exynos4_l2x0_cache_init);
284#endif
285
286int __init exynos_init(void)
287{
288 printk(KERN_INFO "EXYNOS: Initializing architecture\n");
289
290 /* set idle function */
291 pm_idle = exynos_idle;
292
293 /* set sw_reset function */
294 if (soc_is_exynos4210() || soc_is_exynos4212() || soc_is_exynos4412())
295 s5p_reset_hook = exynos4_sw_reset;
296
297 return sysdev_register(&exynos4_sysdev);
298}
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