projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ARM: EXYNOS4: Move S5P_CENTRAL_SEQ_CONFIGURATION setting for PM
[deliverable/linux.git] / arch / arm / mach-exynos4 / pm.c
CommitLineData
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
35static 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
48static 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
202static 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
210void exynos4_cpu_suspend(void)
211{
1663895c
JL		 212 outer_flush_all();
213
214 /* issue the standby signal into the pm unit. */
215 cpu_do_idle();
216
217 /* we should never get past here */
218 panic("sleep resumed to originator?");
219}
220
221static void exynos4_pm_prepare(void)
222{
223 u32 tmp;
224
225 s3c_pm_do_save(exynos4_core_save, ARRAY_SIZE(exynos4_core_save));
226 s3c_pm_do_save(exynos4_l2cc_save, ARRAY_SIZE(exynos4_l2cc_save));
227
228 tmp = __raw_readl(S5P_INFORM1);
229
230 /* Set value of power down register for sleep mode */
231
e4cf2d14 232 exynos4_sys_powerdown_conf(SYS_SLEEP);
1663895c
JL		 233 __raw_writel(S5P_CHECK_SLEEP, S5P_INFORM1);
234
235 /* ensure at least INFORM0 has the resume address */
236
237 __raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
238
239 /* Before enter central sequence mode, clock src register have to set */
240
241 s3c_pm_do_restore_core(exynos4_set_clksrc, ARRAY_SIZE(exynos4_set_clksrc));
242
243}
244
245static int exynos4_pm_add(struct sys_device *sysdev)
246{
247 pm_cpu_prep = exynos4_pm_prepare;
248 pm_cpu_sleep = exynos4_cpu_suspend;
249
250 return 0;
251}
252
253/* This function copy from linux/arch/arm/kernel/smp_scu.c */
254
255void exynos4_scu_enable(void __iomem *scu_base)
256{
257 u32 scu_ctrl;
258
259 scu_ctrl = __raw_readl(scu_base);
260 /* already enabled? */
261 if (scu_ctrl & 1)
262 return;
263
264 scu_ctrl |= 1;
265 __raw_writel(scu_ctrl, scu_base);
266
267 /*
268 * Ensure that the data accessed by CPU0 before the SCU was
269 * initialised is visible to the other CPUs.
270 */
271 flush_cache_all();
272}
273
bb072c3c
RW		 274static struct sysdev_driver exynos4_pm_driver = {
275 .add = exynos4_pm_add,
276};
277
278static __init int exynos4_pm_drvinit(void)
279{
280 unsigned int tmp;
281
282 s3c_pm_init();
283
284 /* All wakeup disable */
285
286 tmp = __raw_readl(S5P_WAKEUP_MASK);
287 tmp |= ((0xFF << 8) | (0x1F << 1));
288 __raw_writel(tmp, S5P_WAKEUP_MASK);
289
290 return sysdev_driver_register(&exynos4_sysclass, &exynos4_pm_driver);
291}
292arch_initcall(exynos4_pm_drvinit);
293
12974e9f
JL		 294static int exynos4_pm_suspend(void)
295{
296 unsigned long tmp;
297
298 /* Setting Central Sequence Register for power down mode */
299
300 tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION);
301 tmp &= ~S5P_CENTRAL_LOWPWR_CFG;
302 __raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
303
304 return 0;
305}
306
bb072c3c 307static void exynos4_pm_resume(void)
1663895c 308{
e240ab1c
JL		 309 unsigned long tmp;
310
311 /*
312 * If PMU failed while entering sleep mode, WFI will be
313 * ignored by PMU and then exiting cpu_do_idle().
314 * S5P_CENTRAL_LOWPWR_CFG bit will not be set automatically
315 * in this situation.
316 */
317 tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION);
318 if (!(tmp & S5P_CENTRAL_LOWPWR_CFG)) {
319 tmp |= S5P_CENTRAL_LOWPWR_CFG;
320 __raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
321 /* No need to perform below restore code */
322 goto early_wakeup;
323 }
324
1663895c
JL		 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
e240ab1c
JL		 345
346early_wakeup:
347 return;
1663895c
JL		 348}
349
bb072c3c 350static struct syscore_ops exynos4_pm_syscore_ops = {
12974e9f 351 .suspend = exynos4_pm_suspend,
1663895c
JL		 352 .resume = exynos4_pm_resume,
353};
354
bb072c3c 355static __init int exynos4_pm_syscore_init(void)
1663895c 356{
bb072c3c
RW		 357 register_syscore_ops(&exynos4_pm_syscore_ops);
358 return 0;
1663895c 359}
bb072c3c 360arch_initcall(exynos4_pm_syscore_init);
Linux kernel - Deliverables
This page took 0.08433 seconds and 5 git commands to generate.