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1663895c JL |
1 | /* linux/arch/arm/mach-exynos4/pm.c |
2 | * | |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
4 | * http://www.samsung.com | |
5 | * | |
6 | * EXYNOS4210 - Power Management support | |
7 | * | |
8 | * Based on arch/arm/mach-s3c2410/pm.c | |
9 | * Copyright (c) 2006 Simtec Electronics | |
10 | * Ben Dooks <ben@simtec.co.uk> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/suspend.h> | |
bb072c3c | 19 | #include <linux/syscore_ops.h> |
1663895c JL |
20 | #include <linux/io.h> |
21 | ||
22 | #include <asm/cacheflush.h> | |
23 | #include <asm/hardware/cache-l2x0.h> | |
24 | ||
25 | #include <plat/cpu.h> | |
26 | #include <plat/pm.h> | |
27 | ||
28 | #include <mach/regs-irq.h> | |
29 | #include <mach/regs-gpio.h> | |
30 | #include <mach/regs-clock.h> | |
31 | #include <mach/regs-pmu.h> | |
32 | #include <mach/pm-core.h> | |
e4cf2d14 | 33 | #include <mach/pmu.h> |
1663895c JL |
34 | |
35 | static struct sleep_save exynos4_set_clksrc[] = { | |
36 | { .reg = S5P_CLKSRC_MASK_TOP , .val = 0x00000001, }, | |
37 | { .reg = S5P_CLKSRC_MASK_CAM , .val = 0x11111111, }, | |
38 | { .reg = S5P_CLKSRC_MASK_TV , .val = 0x00000111, }, | |
39 | { .reg = S5P_CLKSRC_MASK_LCD0 , .val = 0x00001111, }, | |
40 | { .reg = S5P_CLKSRC_MASK_LCD1 , .val = 0x00001111, }, | |
41 | { .reg = S5P_CLKSRC_MASK_MAUDIO , .val = 0x00000001, }, | |
42 | { .reg = S5P_CLKSRC_MASK_FSYS , .val = 0x01011111, }, | |
43 | { .reg = S5P_CLKSRC_MASK_PERIL0 , .val = 0x01111111, }, | |
44 | { .reg = S5P_CLKSRC_MASK_PERIL1 , .val = 0x01110111, }, | |
45 | { .reg = S5P_CLKSRC_MASK_DMC , .val = 0x00010000, }, | |
46 | }; | |
47 | ||
48 | static struct sleep_save exynos4_core_save[] = { | |
49 | /* CMU side */ | |
50 | SAVE_ITEM(S5P_CLKDIV_LEFTBUS), | |
51 | SAVE_ITEM(S5P_CLKGATE_IP_LEFTBUS), | |
52 | SAVE_ITEM(S5P_CLKDIV_RIGHTBUS), | |
53 | SAVE_ITEM(S5P_CLKGATE_IP_RIGHTBUS), | |
54 | SAVE_ITEM(S5P_EPLL_CON0), | |
55 | SAVE_ITEM(S5P_EPLL_CON1), | |
56 | SAVE_ITEM(S5P_VPLL_CON0), | |
57 | SAVE_ITEM(S5P_VPLL_CON1), | |
58 | SAVE_ITEM(S5P_CLKSRC_TOP0), | |
59 | SAVE_ITEM(S5P_CLKSRC_TOP1), | |
60 | SAVE_ITEM(S5P_CLKSRC_CAM), | |
61 | SAVE_ITEM(S5P_CLKSRC_MFC), | |
62 | SAVE_ITEM(S5P_CLKSRC_IMAGE), | |
63 | SAVE_ITEM(S5P_CLKSRC_LCD0), | |
64 | SAVE_ITEM(S5P_CLKSRC_LCD1), | |
65 | SAVE_ITEM(S5P_CLKSRC_MAUDIO), | |
66 | SAVE_ITEM(S5P_CLKSRC_FSYS), | |
67 | SAVE_ITEM(S5P_CLKSRC_PERIL0), | |
68 | SAVE_ITEM(S5P_CLKSRC_PERIL1), | |
69 | SAVE_ITEM(S5P_CLKDIV_CAM), | |
70 | SAVE_ITEM(S5P_CLKDIV_TV), | |
71 | SAVE_ITEM(S5P_CLKDIV_MFC), | |
72 | SAVE_ITEM(S5P_CLKDIV_G3D), | |
73 | SAVE_ITEM(S5P_CLKDIV_IMAGE), | |
74 | SAVE_ITEM(S5P_CLKDIV_LCD0), | |
75 | SAVE_ITEM(S5P_CLKDIV_LCD1), | |
76 | SAVE_ITEM(S5P_CLKDIV_MAUDIO), | |
77 | SAVE_ITEM(S5P_CLKDIV_FSYS0), | |
78 | SAVE_ITEM(S5P_CLKDIV_FSYS1), | |
79 | SAVE_ITEM(S5P_CLKDIV_FSYS2), | |
80 | SAVE_ITEM(S5P_CLKDIV_FSYS3), | |
81 | SAVE_ITEM(S5P_CLKDIV_PERIL0), | |
82 | SAVE_ITEM(S5P_CLKDIV_PERIL1), | |
83 | SAVE_ITEM(S5P_CLKDIV_PERIL2), | |
84 | SAVE_ITEM(S5P_CLKDIV_PERIL3), | |
85 | SAVE_ITEM(S5P_CLKDIV_PERIL4), | |
86 | SAVE_ITEM(S5P_CLKDIV_PERIL5), | |
87 | SAVE_ITEM(S5P_CLKDIV_TOP), | |
88 | SAVE_ITEM(S5P_CLKSRC_MASK_CAM), | |
89 | SAVE_ITEM(S5P_CLKSRC_MASK_TV), | |
90 | SAVE_ITEM(S5P_CLKSRC_MASK_LCD0), | |
91 | SAVE_ITEM(S5P_CLKSRC_MASK_LCD1), | |
92 | SAVE_ITEM(S5P_CLKSRC_MASK_MAUDIO), | |
93 | SAVE_ITEM(S5P_CLKSRC_MASK_FSYS), | |
94 | SAVE_ITEM(S5P_CLKSRC_MASK_PERIL0), | |
95 | SAVE_ITEM(S5P_CLKSRC_MASK_PERIL1), | |
96 | SAVE_ITEM(S5P_CLKGATE_SCLKCAM), | |
97 | SAVE_ITEM(S5P_CLKGATE_IP_CAM), | |
98 | SAVE_ITEM(S5P_CLKGATE_IP_TV), | |
99 | SAVE_ITEM(S5P_CLKGATE_IP_MFC), | |
100 | SAVE_ITEM(S5P_CLKGATE_IP_G3D), | |
101 | SAVE_ITEM(S5P_CLKGATE_IP_IMAGE), | |
102 | SAVE_ITEM(S5P_CLKGATE_IP_LCD0), | |
103 | SAVE_ITEM(S5P_CLKGATE_IP_LCD1), | |
104 | SAVE_ITEM(S5P_CLKGATE_IP_FSYS), | |
105 | SAVE_ITEM(S5P_CLKGATE_IP_GPS), | |
106 | SAVE_ITEM(S5P_CLKGATE_IP_PERIL), | |
107 | SAVE_ITEM(S5P_CLKGATE_IP_PERIR), | |
108 | SAVE_ITEM(S5P_CLKGATE_BLOCK), | |
109 | SAVE_ITEM(S5P_CLKSRC_MASK_DMC), | |
110 | SAVE_ITEM(S5P_CLKSRC_DMC), | |
111 | SAVE_ITEM(S5P_CLKDIV_DMC0), | |
112 | SAVE_ITEM(S5P_CLKDIV_DMC1), | |
113 | SAVE_ITEM(S5P_CLKGATE_IP_DMC), | |
114 | SAVE_ITEM(S5P_CLKSRC_CPU), | |
115 | SAVE_ITEM(S5P_CLKDIV_CPU), | |
116 | SAVE_ITEM(S5P_CLKGATE_SCLKCPU), | |
117 | SAVE_ITEM(S5P_CLKGATE_IP_CPU), | |
118 | /* GIC side */ | |
119 | SAVE_ITEM(S5P_VA_GIC_CPU + 0x000), | |
120 | SAVE_ITEM(S5P_VA_GIC_CPU + 0x004), | |
121 | SAVE_ITEM(S5P_VA_GIC_CPU + 0x008), | |
122 | SAVE_ITEM(S5P_VA_GIC_CPU + 0x00C), | |
123 | SAVE_ITEM(S5P_VA_GIC_CPU + 0x014), | |
124 | SAVE_ITEM(S5P_VA_GIC_CPU + 0x018), | |
125 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x000), | |
126 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x004), | |
127 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x100), | |
128 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x104), | |
129 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x108), | |
130 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x300), | |
131 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x304), | |
132 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x308), | |
133 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x400), | |
134 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x404), | |
135 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x408), | |
136 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x40C), | |
137 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x410), | |
138 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x414), | |
139 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x418), | |
140 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x41C), | |
141 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x420), | |
142 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x424), | |
143 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x428), | |
144 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x42C), | |
145 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x430), | |
146 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x434), | |
147 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x438), | |
148 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x43C), | |
149 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x440), | |
150 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x444), | |
151 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x448), | |
152 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x44C), | |
153 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x450), | |
154 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x454), | |
155 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x458), | |
156 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x45C), | |
157 | ||
158 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x800), | |
159 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x804), | |
160 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x808), | |
161 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x80C), | |
162 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x810), | |
163 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x814), | |
164 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x818), | |
165 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x81C), | |
166 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x820), | |
167 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x824), | |
168 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x828), | |
169 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x82C), | |
170 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x830), | |
171 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x834), | |
172 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x838), | |
173 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x83C), | |
174 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x840), | |
175 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x844), | |
176 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x848), | |
177 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x84C), | |
178 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x850), | |
179 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x854), | |
180 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x858), | |
181 | SAVE_ITEM(S5P_VA_GIC_DIST + 0x85C), | |
182 | ||
183 | SAVE_ITEM(S5P_VA_GIC_DIST + 0xC00), | |
184 | SAVE_ITEM(S5P_VA_GIC_DIST + 0xC04), | |
185 | SAVE_ITEM(S5P_VA_GIC_DIST + 0xC08), | |
186 | SAVE_ITEM(S5P_VA_GIC_DIST + 0xC0C), | |
187 | SAVE_ITEM(S5P_VA_GIC_DIST + 0xC10), | |
188 | SAVE_ITEM(S5P_VA_GIC_DIST + 0xC14), | |
189 | ||
190 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x000), | |
191 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x010), | |
192 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x020), | |
193 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x030), | |
194 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x040), | |
195 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x050), | |
196 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x060), | |
197 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x070), | |
198 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x080), | |
199 | SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x090), | |
200 | }; | |
201 | ||
202 | static struct sleep_save exynos4_l2cc_save[] = { | |
203 | SAVE_ITEM(S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL), | |
204 | SAVE_ITEM(S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL), | |
205 | SAVE_ITEM(S5P_VA_L2CC + L2X0_PREFETCH_CTRL), | |
206 | SAVE_ITEM(S5P_VA_L2CC + L2X0_POWER_CTRL), | |
207 | SAVE_ITEM(S5P_VA_L2CC + L2X0_AUX_CTRL), | |
208 | }; | |
209 | ||
210 | void exynos4_cpu_suspend(void) | |
211 | { | |
212 | unsigned long tmp; | |
213 | unsigned long mask = 0xFFFFFFFF; | |
214 | ||
215 | /* Setting Central Sequence Register for power down mode */ | |
216 | ||
217 | tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); | |
218 | tmp &= ~(S5P_CENTRAL_LOWPWR_CFG); | |
219 | __raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION); | |
220 | ||
221 | /* Setting Central Sequence option Register */ | |
222 | ||
223 | tmp = __raw_readl(S5P_CENTRAL_SEQ_OPTION); | |
224 | tmp &= ~(S5P_USE_MASK); | |
225 | tmp |= S5P_USE_STANDBY_WFI0; | |
226 | __raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION); | |
227 | ||
228 | /* Clear all interrupt pending to avoid early wakeup */ | |
229 | ||
230 | __raw_writel(mask, (S5P_VA_GIC_DIST + 0x280)); | |
231 | __raw_writel(mask, (S5P_VA_GIC_DIST + 0x284)); | |
232 | __raw_writel(mask, (S5P_VA_GIC_DIST + 0x288)); | |
233 | ||
234 | /* Disable all interrupt */ | |
235 | ||
236 | __raw_writel(0x0, (S5P_VA_GIC_CPU + 0x000)); | |
237 | __raw_writel(0x0, (S5P_VA_GIC_DIST + 0x000)); | |
238 | __raw_writel(mask, (S5P_VA_GIC_DIST + 0x184)); | |
239 | __raw_writel(mask, (S5P_VA_GIC_DIST + 0x188)); | |
240 | ||
241 | outer_flush_all(); | |
242 | ||
243 | /* issue the standby signal into the pm unit. */ | |
244 | cpu_do_idle(); | |
245 | ||
246 | /* we should never get past here */ | |
247 | panic("sleep resumed to originator?"); | |
248 | } | |
249 | ||
250 | static void exynos4_pm_prepare(void) | |
251 | { | |
252 | u32 tmp; | |
253 | ||
254 | s3c_pm_do_save(exynos4_core_save, ARRAY_SIZE(exynos4_core_save)); | |
255 | s3c_pm_do_save(exynos4_l2cc_save, ARRAY_SIZE(exynos4_l2cc_save)); | |
256 | ||
257 | tmp = __raw_readl(S5P_INFORM1); | |
258 | ||
259 | /* Set value of power down register for sleep mode */ | |
260 | ||
e4cf2d14 | 261 | exynos4_sys_powerdown_conf(SYS_SLEEP); |
1663895c JL |
262 | __raw_writel(S5P_CHECK_SLEEP, S5P_INFORM1); |
263 | ||
264 | /* ensure at least INFORM0 has the resume address */ | |
265 | ||
266 | __raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0); | |
267 | ||
268 | /* Before enter central sequence mode, clock src register have to set */ | |
269 | ||
270 | s3c_pm_do_restore_core(exynos4_set_clksrc, ARRAY_SIZE(exynos4_set_clksrc)); | |
271 | ||
272 | } | |
273 | ||
274 | static int exynos4_pm_add(struct sys_device *sysdev) | |
275 | { | |
276 | pm_cpu_prep = exynos4_pm_prepare; | |
277 | pm_cpu_sleep = exynos4_cpu_suspend; | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | /* This function copy from linux/arch/arm/kernel/smp_scu.c */ | |
283 | ||
284 | void exynos4_scu_enable(void __iomem *scu_base) | |
285 | { | |
286 | u32 scu_ctrl; | |
287 | ||
288 | scu_ctrl = __raw_readl(scu_base); | |
289 | /* already enabled? */ | |
290 | if (scu_ctrl & 1) | |
291 | return; | |
292 | ||
293 | scu_ctrl |= 1; | |
294 | __raw_writel(scu_ctrl, scu_base); | |
295 | ||
296 | /* | |
297 | * Ensure that the data accessed by CPU0 before the SCU was | |
298 | * initialised is visible to the other CPUs. | |
299 | */ | |
300 | flush_cache_all(); | |
301 | } | |
302 | ||
bb072c3c RW |
303 | static struct sysdev_driver exynos4_pm_driver = { |
304 | .add = exynos4_pm_add, | |
305 | }; | |
306 | ||
307 | static __init int exynos4_pm_drvinit(void) | |
308 | { | |
309 | unsigned int tmp; | |
310 | ||
311 | s3c_pm_init(); | |
312 | ||
313 | /* All wakeup disable */ | |
314 | ||
315 | tmp = __raw_readl(S5P_WAKEUP_MASK); | |
316 | tmp |= ((0xFF << 8) | (0x1F << 1)); | |
317 | __raw_writel(tmp, S5P_WAKEUP_MASK); | |
318 | ||
319 | return sysdev_driver_register(&exynos4_sysclass, &exynos4_pm_driver); | |
320 | } | |
321 | arch_initcall(exynos4_pm_drvinit); | |
322 | ||
323 | static void exynos4_pm_resume(void) | |
1663895c JL |
324 | { |
325 | /* For release retention */ | |
326 | ||
327 | __raw_writel((1 << 28), S5P_PAD_RET_MAUDIO_OPTION); | |
328 | __raw_writel((1 << 28), S5P_PAD_RET_GPIO_OPTION); | |
329 | __raw_writel((1 << 28), S5P_PAD_RET_UART_OPTION); | |
330 | __raw_writel((1 << 28), S5P_PAD_RET_MMCA_OPTION); | |
331 | __raw_writel((1 << 28), S5P_PAD_RET_MMCB_OPTION); | |
332 | __raw_writel((1 << 28), S5P_PAD_RET_EBIA_OPTION); | |
333 | __raw_writel((1 << 28), S5P_PAD_RET_EBIB_OPTION); | |
334 | ||
335 | s3c_pm_do_restore_core(exynos4_core_save, ARRAY_SIZE(exynos4_core_save)); | |
336 | ||
337 | exynos4_scu_enable(S5P_VA_SCU); | |
338 | ||
339 | #ifdef CONFIG_CACHE_L2X0 | |
340 | s3c_pm_do_restore_core(exynos4_l2cc_save, ARRAY_SIZE(exynos4_l2cc_save)); | |
341 | outer_inv_all(); | |
342 | /* enable L2X0*/ | |
343 | writel_relaxed(1, S5P_VA_L2CC + L2X0_CTRL); | |
344 | #endif | |
1663895c JL |
345 | } |
346 | ||
bb072c3c | 347 | static struct syscore_ops exynos4_pm_syscore_ops = { |
1663895c JL |
348 | .resume = exynos4_pm_resume, |
349 | }; | |
350 | ||
bb072c3c | 351 | static __init int exynos4_pm_syscore_init(void) |
1663895c | 352 | { |
bb072c3c RW |
353 | register_syscore_ops(&exynos4_pm_syscore_ops); |
354 | return 0; | |
1663895c | 355 | } |
bb072c3c | 356 | arch_initcall(exynos4_pm_syscore_init); |