1 /* linux/arch/arm/plat-s3c64xx/pm.c
3 * Copyright 2008 Openmoko, Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/
8 * S3C64XX CPU PM support.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/init.h>
16 #include <linux/suspend.h>
17 #include <linux/serial_core.h>
19 #include <linux/gpio.h>
20 #include <linux/pm_domain.h>
23 #include <mach/irqs.h>
25 #include <plat/devs.h>
27 #include <plat/wakeup-mask.h>
29 #include <mach/regs-gpio.h>
30 #include <mach/regs-clock.h>
32 #include "regs-gpio-memport.h"
33 #include "regs-modem.h"
35 #include "regs-syscon-power.h"
37 struct s3c64xx_pm_domain {
41 struct generic_pm_domain pd;
44 static int s3c64xx_pd_off(struct generic_pm_domain *domain)
46 struct s3c64xx_pm_domain *pd;
49 pd = container_of(domain, struct s3c64xx_pm_domain, pd);
51 val = __raw_readl(S3C64XX_NORMAL_CFG);
53 __raw_writel(val, S3C64XX_NORMAL_CFG);
58 static int s3c64xx_pd_on(struct generic_pm_domain *domain)
60 struct s3c64xx_pm_domain *pd;
62 long retry = 1000000L;
64 pd = container_of(domain, struct s3c64xx_pm_domain, pd);
66 val = __raw_readl(S3C64XX_NORMAL_CFG);
68 __raw_writel(val, S3C64XX_NORMAL_CFG);
70 /* Not all domains provide power status readback */
74 if (__raw_readl(S3C64XX_BLK_PWR_STAT) & pd->pwr_stat)
79 pr_err("Failed to start domain %s\n", pd->name);
87 static struct s3c64xx_pm_domain s3c64xx_pm_irom = {
89 .ena = S3C64XX_NORMALCFG_IROM_ON,
91 .power_off = s3c64xx_pd_off,
92 .power_on = s3c64xx_pd_on,
96 static struct s3c64xx_pm_domain s3c64xx_pm_etm = {
98 .ena = S3C64XX_NORMALCFG_DOMAIN_ETM_ON,
99 .pwr_stat = S3C64XX_BLKPWRSTAT_ETM,
101 .power_off = s3c64xx_pd_off,
102 .power_on = s3c64xx_pd_on,
106 static struct s3c64xx_pm_domain s3c64xx_pm_s = {
108 .ena = S3C64XX_NORMALCFG_DOMAIN_S_ON,
109 .pwr_stat = S3C64XX_BLKPWRSTAT_S,
111 .power_off = s3c64xx_pd_off,
112 .power_on = s3c64xx_pd_on,
116 static struct s3c64xx_pm_domain s3c64xx_pm_f = {
118 .ena = S3C64XX_NORMALCFG_DOMAIN_F_ON,
119 .pwr_stat = S3C64XX_BLKPWRSTAT_F,
121 .power_off = s3c64xx_pd_off,
122 .power_on = s3c64xx_pd_on,
126 static struct s3c64xx_pm_domain s3c64xx_pm_p = {
128 .ena = S3C64XX_NORMALCFG_DOMAIN_P_ON,
129 .pwr_stat = S3C64XX_BLKPWRSTAT_P,
131 .power_off = s3c64xx_pd_off,
132 .power_on = s3c64xx_pd_on,
136 static struct s3c64xx_pm_domain s3c64xx_pm_i = {
138 .ena = S3C64XX_NORMALCFG_DOMAIN_I_ON,
139 .pwr_stat = S3C64XX_BLKPWRSTAT_I,
141 .power_off = s3c64xx_pd_off,
142 .power_on = s3c64xx_pd_on,
146 static struct s3c64xx_pm_domain s3c64xx_pm_g = {
148 .ena = S3C64XX_NORMALCFG_DOMAIN_G_ON,
150 .power_off = s3c64xx_pd_off,
151 .power_on = s3c64xx_pd_on,
155 static struct s3c64xx_pm_domain s3c64xx_pm_v = {
157 .ena = S3C64XX_NORMALCFG_DOMAIN_V_ON,
158 .pwr_stat = S3C64XX_BLKPWRSTAT_V,
160 .power_off = s3c64xx_pd_off,
161 .power_on = s3c64xx_pd_on,
165 static struct s3c64xx_pm_domain *s3c64xx_always_on_pm_domains[] = {
169 static struct s3c64xx_pm_domain *s3c64xx_pm_domains[] = {
179 #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
180 void s3c_pm_debug_smdkled(u32 set, u32 clear)
185 local_irq_save(flags);
186 for (i = 0; i < 4; i++) {
187 if (clear & (1 << i))
188 gpio_set_value(S3C64XX_GPN(12 + i), 0);
190 gpio_set_value(S3C64XX_GPN(12 + i), 1);
192 local_irq_restore(flags);
196 static struct sleep_save core_save[] = {
197 SAVE_ITEM(S3C_APLL_LOCK),
198 SAVE_ITEM(S3C_MPLL_LOCK),
199 SAVE_ITEM(S3C_EPLL_LOCK),
200 SAVE_ITEM(S3C_CLK_SRC),
201 SAVE_ITEM(S3C_CLK_DIV0),
202 SAVE_ITEM(S3C_CLK_DIV1),
203 SAVE_ITEM(S3C_CLK_DIV2),
204 SAVE_ITEM(S3C_CLK_OUT),
205 SAVE_ITEM(S3C_HCLK_GATE),
206 SAVE_ITEM(S3C_PCLK_GATE),
207 SAVE_ITEM(S3C_SCLK_GATE),
208 SAVE_ITEM(S3C_MEM0_GATE),
210 SAVE_ITEM(S3C_EPLL_CON1),
211 SAVE_ITEM(S3C_EPLL_CON0),
213 SAVE_ITEM(S3C64XX_MEM0DRVCON),
214 SAVE_ITEM(S3C64XX_MEM1DRVCON),
216 #ifndef CONFIG_CPU_FREQ
217 SAVE_ITEM(S3C_APLL_CON),
218 SAVE_ITEM(S3C_MPLL_CON),
222 static struct sleep_save misc_save[] = {
223 SAVE_ITEM(S3C64XX_AHB_CON0),
224 SAVE_ITEM(S3C64XX_AHB_CON1),
225 SAVE_ITEM(S3C64XX_AHB_CON2),
227 SAVE_ITEM(S3C64XX_SPCON),
229 SAVE_ITEM(S3C64XX_MEM0CONSTOP),
230 SAVE_ITEM(S3C64XX_MEM1CONSTOP),
231 SAVE_ITEM(S3C64XX_MEM0CONSLP0),
232 SAVE_ITEM(S3C64XX_MEM0CONSLP1),
233 SAVE_ITEM(S3C64XX_MEM1CONSLP),
235 SAVE_ITEM(S3C64XX_SDMA_SEL),
236 SAVE_ITEM(S3C64XX_MODEM_MIFPCON),
238 SAVE_ITEM(S3C64XX_NORMAL_CFG),
241 void s3c_pm_configure_extint(void)
243 __raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
246 void s3c_pm_restore_core(void)
248 __raw_writel(0, S3C64XX_EINT_MASK);
250 s3c_pm_debug_smdkled(1 << 2, 0);
252 s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
253 s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
256 void s3c_pm_save_core(void)
258 s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
259 s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
262 /* since both s3c6400 and s3c6410 share the same sleep pm calls, we
263 * put the per-cpu code in here until any new cpu comes along and changes
267 static int s3c64xx_cpu_suspend(unsigned long arg)
271 /* set our standby method to sleep */
273 tmp = __raw_readl(S3C64XX_PWR_CFG);
274 tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
275 tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP;
276 __raw_writel(tmp, S3C64XX_PWR_CFG);
278 /* clear any old wakeup */
280 __raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT),
281 S3C64XX_WAKEUP_STAT);
283 /* set the LED state to 0110 over sleep */
284 s3c_pm_debug_smdkled(3 << 1, 0xf);
286 /* issue the standby signal into the pm unit. Note, we
287 * issue a write-buffer drain just in case */
294 "mcr p15, 0, %0, c7, c10, 5\n\t"
295 "mcr p15, 0, %0, c7, c10, 4\n\t"
296 "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
298 /* we should never get past here */
300 pr_info("Failed to suspend the system\n");
301 return 1; /* Aborting suspend */
304 /* mapping of interrupts to parts of the wakeup mask */
305 static struct samsung_wakeup_mask wake_irqs[] = {
306 { .irq = IRQ_RTC_ALARM, .bit = S3C64XX_PWRCFG_RTC_ALARM_DISABLE, },
307 { .irq = IRQ_RTC_TIC, .bit = S3C64XX_PWRCFG_RTC_TICK_DISABLE, },
308 { .irq = IRQ_PENDN, .bit = S3C64XX_PWRCFG_TS_DISABLE, },
309 { .irq = IRQ_HSMMC0, .bit = S3C64XX_PWRCFG_MMC0_DISABLE, },
310 { .irq = IRQ_HSMMC1, .bit = S3C64XX_PWRCFG_MMC1_DISABLE, },
311 { .irq = IRQ_HSMMC2, .bit = S3C64XX_PWRCFG_MMC2_DISABLE, },
312 { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_BATF_DISABLE},
313 { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_MSM_DISABLE },
314 { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_HSI_DISABLE },
315 { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_MSM_DISABLE },
318 static void s3c64xx_pm_prepare(void)
320 samsung_sync_wakemask(S3C64XX_PWR_CFG,
321 wake_irqs, ARRAY_SIZE(wake_irqs));
323 /* store address of resume. */
324 __raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
326 /* ensure previous wakeup state is cleared before sleeping */
327 __raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);
330 int __init s3c64xx_pm_init(void)
336 for (i = 0; i < ARRAY_SIZE(s3c64xx_always_on_pm_domains); i++)
337 pm_genpd_init(&s3c64xx_always_on_pm_domains[i]->pd,
338 &pm_domain_always_on_gov, false);
340 for (i = 0; i < ARRAY_SIZE(s3c64xx_pm_domains); i++)
341 pm_genpd_init(&s3c64xx_pm_domains[i]->pd, NULL, false);
343 #ifdef CONFIG_S3C_DEV_FB
344 if (dev_get_platdata(&s3c_device_fb.dev))
345 pm_genpd_add_device(&s3c64xx_pm_f.pd, &s3c_device_fb.dev);
351 static __init int s3c64xx_pm_initcall(void)
353 pm_cpu_prep = s3c64xx_pm_prepare;
354 pm_cpu_sleep = s3c64xx_cpu_suspend;
355 pm_uart_udivslot = 1;
357 #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
358 gpio_request(S3C64XX_GPN(12), "DEBUG_LED0");
359 gpio_request(S3C64XX_GPN(13), "DEBUG_LED1");
360 gpio_request(S3C64XX_GPN(14), "DEBUG_LED2");
361 gpio_request(S3C64XX_GPN(15), "DEBUG_LED3");
362 gpio_direction_output(S3C64XX_GPN(12), 0);
363 gpio_direction_output(S3C64XX_GPN(13), 0);
364 gpio_direction_output(S3C64XX_GPN(14), 0);
365 gpio_direction_output(S3C64XX_GPN(15), 0);
370 arch_initcall(s3c64xx_pm_initcall);
372 int __init s3c64xx_pm_late_initcall(void)
374 pm_genpd_poweroff_unused();