Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 1 | /* linux/arch/arm/plat-s3c64xx/pm.c |
| 2 | * |
| 3 | * Copyright 2008 Openmoko, Inc. |
| 4 | * Copyright 2008 Simtec Electronics |
| 5 | * Ben Dooks <ben@simtec.co.uk> |
| 6 | * http://armlinux.simtec.co.uk/ |
| 7 | * |
| 8 | * S3C64XX CPU PM support. |
| 9 | * |
| 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. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/suspend.h> |
| 17 | #include <linux/serial_core.h> |
| 18 | #include <linux/io.h> |
Abhilash Kesavan | f98d429d | 2011-08-13 10:40:52 +0900 | [diff] [blame] | 19 | #include <linux/gpio.h> |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 20 | #include <linux/pm_domain.h> |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 21 | |
| 22 | #include <mach/map.h> |
Ben Dooks | fda2257 | 2010-05-20 12:56:45 +0900 | [diff] [blame] | 23 | #include <mach/irqs.h> |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 24 | |
Arnd Bergmann | a0e157a | 2015-02-27 20:31:51 +0100 | [diff] [blame] | 25 | #include <plat/cpu.h> |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 26 | #include <plat/devs.h> |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 27 | #include <plat/pm.h> |
Ben Dooks | fda2257 | 2010-05-20 12:56:45 +0900 | [diff] [blame] | 28 | #include <plat/wakeup-mask.h> |
| 29 | |
Ben Dooks | 3501c9a | 2010-01-26 10:45:40 +0900 | [diff] [blame] | 30 | #include <mach/regs-gpio.h> |
| 31 | #include <mach/regs-clock.h> |
Linus Walleij | b0161ca | 2014-01-14 14:24:24 +0100 | [diff] [blame] | 32 | #include <mach/gpio-samsung.h> |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 33 | |
Kukjin Kim | 8bb86ea | 2013-01-02 13:20:38 -0800 | [diff] [blame] | 34 | #include "regs-gpio-memport.h" |
Kukjin Kim | a81c197 | 2013-01-02 13:24:12 -0800 | [diff] [blame] | 35 | #include "regs-modem.h" |
Kukjin Kim | f2bfd17 | 2013-01-02 13:31:15 -0800 | [diff] [blame] | 36 | #include "regs-sys.h" |
Kukjin Kim | e8f5588 | 2013-01-02 13:33:20 -0800 | [diff] [blame] | 37 | #include "regs-syscon-power.h" |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 38 | |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 39 | struct s3c64xx_pm_domain { |
| 40 | char *const name; |
| 41 | u32 ena; |
| 42 | u32 pwr_stat; |
| 43 | struct generic_pm_domain pd; |
| 44 | }; |
| 45 | |
| 46 | static int s3c64xx_pd_off(struct generic_pm_domain *domain) |
| 47 | { |
| 48 | struct s3c64xx_pm_domain *pd; |
| 49 | u32 val; |
| 50 | |
| 51 | pd = container_of(domain, struct s3c64xx_pm_domain, pd); |
| 52 | |
| 53 | val = __raw_readl(S3C64XX_NORMAL_CFG); |
| 54 | val &= ~(pd->ena); |
| 55 | __raw_writel(val, S3C64XX_NORMAL_CFG); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | static int s3c64xx_pd_on(struct generic_pm_domain *domain) |
| 61 | { |
| 62 | struct s3c64xx_pm_domain *pd; |
| 63 | u32 val; |
| 64 | long retry = 1000000L; |
| 65 | |
| 66 | pd = container_of(domain, struct s3c64xx_pm_domain, pd); |
| 67 | |
| 68 | val = __raw_readl(S3C64XX_NORMAL_CFG); |
| 69 | val |= pd->ena; |
| 70 | __raw_writel(val, S3C64XX_NORMAL_CFG); |
| 71 | |
| 72 | /* Not all domains provide power status readback */ |
| 73 | if (pd->pwr_stat) { |
| 74 | do { |
| 75 | cpu_relax(); |
| 76 | if (__raw_readl(S3C64XX_BLK_PWR_STAT) & pd->pwr_stat) |
| 77 | break; |
| 78 | } while (retry--); |
| 79 | |
| 80 | if (!retry) { |
| 81 | pr_err("Failed to start domain %s\n", pd->name); |
| 82 | return -EBUSY; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static struct s3c64xx_pm_domain s3c64xx_pm_irom = { |
| 90 | .name = "IROM", |
| 91 | .ena = S3C64XX_NORMALCFG_IROM_ON, |
| 92 | .pd = { |
| 93 | .power_off = s3c64xx_pd_off, |
| 94 | .power_on = s3c64xx_pd_on, |
| 95 | }, |
| 96 | }; |
| 97 | |
| 98 | static struct s3c64xx_pm_domain s3c64xx_pm_etm = { |
| 99 | .name = "ETM", |
| 100 | .ena = S3C64XX_NORMALCFG_DOMAIN_ETM_ON, |
| 101 | .pwr_stat = S3C64XX_BLKPWRSTAT_ETM, |
| 102 | .pd = { |
| 103 | .power_off = s3c64xx_pd_off, |
| 104 | .power_on = s3c64xx_pd_on, |
| 105 | }, |
| 106 | }; |
| 107 | |
| 108 | static struct s3c64xx_pm_domain s3c64xx_pm_s = { |
| 109 | .name = "S", |
| 110 | .ena = S3C64XX_NORMALCFG_DOMAIN_S_ON, |
| 111 | .pwr_stat = S3C64XX_BLKPWRSTAT_S, |
| 112 | .pd = { |
| 113 | .power_off = s3c64xx_pd_off, |
| 114 | .power_on = s3c64xx_pd_on, |
| 115 | }, |
| 116 | }; |
| 117 | |
| 118 | static struct s3c64xx_pm_domain s3c64xx_pm_f = { |
| 119 | .name = "F", |
| 120 | .ena = S3C64XX_NORMALCFG_DOMAIN_F_ON, |
| 121 | .pwr_stat = S3C64XX_BLKPWRSTAT_F, |
| 122 | .pd = { |
| 123 | .power_off = s3c64xx_pd_off, |
| 124 | .power_on = s3c64xx_pd_on, |
| 125 | }, |
| 126 | }; |
| 127 | |
| 128 | static struct s3c64xx_pm_domain s3c64xx_pm_p = { |
| 129 | .name = "P", |
| 130 | .ena = S3C64XX_NORMALCFG_DOMAIN_P_ON, |
| 131 | .pwr_stat = S3C64XX_BLKPWRSTAT_P, |
| 132 | .pd = { |
| 133 | .power_off = s3c64xx_pd_off, |
| 134 | .power_on = s3c64xx_pd_on, |
| 135 | }, |
| 136 | }; |
| 137 | |
| 138 | static struct s3c64xx_pm_domain s3c64xx_pm_i = { |
| 139 | .name = "I", |
| 140 | .ena = S3C64XX_NORMALCFG_DOMAIN_I_ON, |
| 141 | .pwr_stat = S3C64XX_BLKPWRSTAT_I, |
| 142 | .pd = { |
| 143 | .power_off = s3c64xx_pd_off, |
| 144 | .power_on = s3c64xx_pd_on, |
| 145 | }, |
| 146 | }; |
| 147 | |
| 148 | static struct s3c64xx_pm_domain s3c64xx_pm_g = { |
| 149 | .name = "G", |
| 150 | .ena = S3C64XX_NORMALCFG_DOMAIN_G_ON, |
| 151 | .pd = { |
| 152 | .power_off = s3c64xx_pd_off, |
| 153 | .power_on = s3c64xx_pd_on, |
| 154 | }, |
| 155 | }; |
| 156 | |
| 157 | static struct s3c64xx_pm_domain s3c64xx_pm_v = { |
| 158 | .name = "V", |
| 159 | .ena = S3C64XX_NORMALCFG_DOMAIN_V_ON, |
| 160 | .pwr_stat = S3C64XX_BLKPWRSTAT_V, |
| 161 | .pd = { |
| 162 | .power_off = s3c64xx_pd_off, |
| 163 | .power_on = s3c64xx_pd_on, |
| 164 | }, |
| 165 | }; |
| 166 | |
| 167 | static struct s3c64xx_pm_domain *s3c64xx_always_on_pm_domains[] = { |
| 168 | &s3c64xx_pm_irom, |
| 169 | }; |
| 170 | |
| 171 | static struct s3c64xx_pm_domain *s3c64xx_pm_domains[] = { |
| 172 | &s3c64xx_pm_etm, |
| 173 | &s3c64xx_pm_g, |
| 174 | &s3c64xx_pm_v, |
| 175 | &s3c64xx_pm_i, |
| 176 | &s3c64xx_pm_p, |
| 177 | &s3c64xx_pm_s, |
| 178 | &s3c64xx_pm_f, |
| 179 | }; |
| 180 | |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 181 | #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 182 | void s3c_pm_debug_smdkled(u32 set, u32 clear) |
| 183 | { |
| 184 | unsigned long flags; |
Joonyoung Shim | 3185847 | 2011-05-06 09:37:17 +0900 | [diff] [blame] | 185 | int i; |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 186 | |
| 187 | local_irq_save(flags); |
Joonyoung Shim | 3185847 | 2011-05-06 09:37:17 +0900 | [diff] [blame] | 188 | for (i = 0; i < 4; i++) { |
| 189 | if (clear & (1 << i)) |
| 190 | gpio_set_value(S3C64XX_GPN(12 + i), 0); |
| 191 | if (set & (1 << i)) |
| 192 | gpio_set_value(S3C64XX_GPN(12 + i), 1); |
| 193 | } |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 194 | local_irq_restore(flags); |
| 195 | } |
| 196 | #endif |
| 197 | |
Arnd Bergmann | 484c213 | 2015-02-27 05:50:22 +0900 | [diff] [blame] | 198 | #ifdef CONFIG_PM_SLEEP |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 199 | static struct sleep_save core_save[] = { |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 200 | SAVE_ITEM(S3C64XX_MEM0DRVCON), |
| 201 | SAVE_ITEM(S3C64XX_MEM1DRVCON), |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 202 | }; |
| 203 | |
| 204 | static struct sleep_save misc_save[] = { |
| 205 | SAVE_ITEM(S3C64XX_AHB_CON0), |
| 206 | SAVE_ITEM(S3C64XX_AHB_CON1), |
| 207 | SAVE_ITEM(S3C64XX_AHB_CON2), |
| 208 | |
| 209 | SAVE_ITEM(S3C64XX_SPCON), |
| 210 | |
| 211 | SAVE_ITEM(S3C64XX_MEM0CONSTOP), |
| 212 | SAVE_ITEM(S3C64XX_MEM1CONSTOP), |
| 213 | SAVE_ITEM(S3C64XX_MEM0CONSLP0), |
| 214 | SAVE_ITEM(S3C64XX_MEM0CONSLP1), |
| 215 | SAVE_ITEM(S3C64XX_MEM1CONSLP), |
Tomasz Figa | 348276f | 2011-08-23 11:33:08 +0900 | [diff] [blame] | 216 | |
| 217 | SAVE_ITEM(S3C64XX_SDMA_SEL), |
Tomasz Figa | d9018df | 2011-08-23 11:33:08 +0900 | [diff] [blame] | 218 | SAVE_ITEM(S3C64XX_MODEM_MIFPCON), |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 219 | |
| 220 | SAVE_ITEM(S3C64XX_NORMAL_CFG), |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 221 | }; |
| 222 | |
| 223 | void s3c_pm_configure_extint(void) |
| 224 | { |
| 225 | __raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK); |
| 226 | } |
| 227 | |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 228 | void s3c_pm_restore_core(void) |
| 229 | { |
| 230 | __raw_writel(0, S3C64XX_EINT_MASK); |
| 231 | |
| 232 | s3c_pm_debug_smdkled(1 << 2, 0); |
| 233 | |
| 234 | s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save)); |
| 235 | s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save)); |
| 236 | } |
| 237 | |
| 238 | void s3c_pm_save_core(void) |
| 239 | { |
| 240 | s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save)); |
| 241 | s3c_pm_do_save(core_save, ARRAY_SIZE(core_save)); |
| 242 | } |
Arnd Bergmann | 484c213 | 2015-02-27 05:50:22 +0900 | [diff] [blame] | 243 | #endif |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 244 | |
| 245 | /* since both s3c6400 and s3c6410 share the same sleep pm calls, we |
| 246 | * put the per-cpu code in here until any new cpu comes along and changes |
| 247 | * this. |
| 248 | */ |
| 249 | |
Russell King | 29cb3cd | 2011-07-02 09:54:01 +0100 | [diff] [blame] | 250 | static int s3c64xx_cpu_suspend(unsigned long arg) |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 251 | { |
| 252 | unsigned long tmp; |
| 253 | |
| 254 | /* set our standby method to sleep */ |
| 255 | |
| 256 | tmp = __raw_readl(S3C64XX_PWR_CFG); |
| 257 | tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK; |
| 258 | tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP; |
| 259 | __raw_writel(tmp, S3C64XX_PWR_CFG); |
| 260 | |
| 261 | /* clear any old wakeup */ |
| 262 | |
| 263 | __raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), |
| 264 | S3C64XX_WAKEUP_STAT); |
| 265 | |
| 266 | /* set the LED state to 0110 over sleep */ |
| 267 | s3c_pm_debug_smdkled(3 << 1, 0xf); |
| 268 | |
| 269 | /* issue the standby signal into the pm unit. Note, we |
| 270 | * issue a write-buffer drain just in case */ |
| 271 | |
| 272 | tmp = 0; |
| 273 | |
| 274 | asm("b 1f\n\t" |
| 275 | ".align 5\n\t" |
| 276 | "1:\n\t" |
| 277 | "mcr p15, 0, %0, c7, c10, 5\n\t" |
| 278 | "mcr p15, 0, %0, c7, c10, 4\n\t" |
| 279 | "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp)); |
| 280 | |
| 281 | /* we should never get past here */ |
| 282 | |
Abhilash Kesavan | d3fcacf | 2013-01-25 10:40:19 -0800 | [diff] [blame] | 283 | pr_info("Failed to suspend the system\n"); |
| 284 | return 1; /* Aborting suspend */ |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 285 | } |
| 286 | |
Ben Dooks | fda2257 | 2010-05-20 12:56:45 +0900 | [diff] [blame] | 287 | /* mapping of interrupts to parts of the wakeup mask */ |
| 288 | static struct samsung_wakeup_mask wake_irqs[] = { |
| 289 | { .irq = IRQ_RTC_ALARM, .bit = S3C64XX_PWRCFG_RTC_ALARM_DISABLE, }, |
| 290 | { .irq = IRQ_RTC_TIC, .bit = S3C64XX_PWRCFG_RTC_TICK_DISABLE, }, |
| 291 | { .irq = IRQ_PENDN, .bit = S3C64XX_PWRCFG_TS_DISABLE, }, |
| 292 | { .irq = IRQ_HSMMC0, .bit = S3C64XX_PWRCFG_MMC0_DISABLE, }, |
| 293 | { .irq = IRQ_HSMMC1, .bit = S3C64XX_PWRCFG_MMC1_DISABLE, }, |
| 294 | { .irq = IRQ_HSMMC2, .bit = S3C64XX_PWRCFG_MMC2_DISABLE, }, |
| 295 | { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_BATF_DISABLE}, |
| 296 | { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_MSM_DISABLE }, |
| 297 | { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_HSI_DISABLE }, |
| 298 | { .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_MSM_DISABLE }, |
| 299 | }; |
| 300 | |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 301 | static void s3c64xx_pm_prepare(void) |
| 302 | { |
Ben Dooks | fda2257 | 2010-05-20 12:56:45 +0900 | [diff] [blame] | 303 | samsung_sync_wakemask(S3C64XX_PWR_CFG, |
| 304 | wake_irqs, ARRAY_SIZE(wake_irqs)); |
| 305 | |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 306 | /* store address of resume. */ |
| 307 | __raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0); |
| 308 | |
| 309 | /* ensure previous wakeup state is cleared before sleeping */ |
| 310 | __raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT); |
| 311 | } |
| 312 | |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 313 | int __init s3c64xx_pm_init(void) |
| 314 | { |
| 315 | int i; |
| 316 | |
| 317 | s3c_pm_init(); |
| 318 | |
| 319 | for (i = 0; i < ARRAY_SIZE(s3c64xx_always_on_pm_domains); i++) |
| 320 | pm_genpd_init(&s3c64xx_always_on_pm_domains[i]->pd, |
| 321 | &pm_domain_always_on_gov, false); |
| 322 | |
| 323 | for (i = 0; i < ARRAY_SIZE(s3c64xx_pm_domains); i++) |
| 324 | pm_genpd_init(&s3c64xx_pm_domains[i]->pd, NULL, false); |
| 325 | |
Tomasz Figa | c0d6cfd | 2013-01-09 17:13:23 -0800 | [diff] [blame] | 326 | #ifdef CONFIG_S3C_DEV_FB |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 327 | if (dev_get_platdata(&s3c_device_fb.dev)) |
| 328 | pm_genpd_add_device(&s3c64xx_pm_f.pd, &s3c_device_fb.dev); |
Tomasz Figa | c0d6cfd | 2013-01-09 17:13:23 -0800 | [diff] [blame] | 329 | #endif |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | static __init int s3c64xx_pm_initcall(void) |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 335 | { |
Arnd Bergmann | a0e157a | 2015-02-27 20:31:51 +0100 | [diff] [blame] | 336 | if (!soc_is_s3c64xx()) |
| 337 | return 0; |
| 338 | |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 339 | pm_cpu_prep = s3c64xx_pm_prepare; |
| 340 | pm_cpu_sleep = s3c64xx_cpu_suspend; |
Joonyoung Shim | 3185847 | 2011-05-06 09:37:17 +0900 | [diff] [blame] | 341 | |
| 342 | #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK |
| 343 | gpio_request(S3C64XX_GPN(12), "DEBUG_LED0"); |
| 344 | gpio_request(S3C64XX_GPN(13), "DEBUG_LED1"); |
| 345 | gpio_request(S3C64XX_GPN(14), "DEBUG_LED2"); |
| 346 | gpio_request(S3C64XX_GPN(15), "DEBUG_LED3"); |
| 347 | gpio_direction_output(S3C64XX_GPN(12), 0); |
| 348 | gpio_direction_output(S3C64XX_GPN(13), 0); |
| 349 | gpio_direction_output(S3C64XX_GPN(14), 0); |
| 350 | gpio_direction_output(S3C64XX_GPN(15), 0); |
| 351 | #endif |
| 352 | |
Ben Dooks | bd117bd | 2009-03-10 18:19:35 +0000 | [diff] [blame] | 353 | return 0; |
| 354 | } |
Mark Brown | c656c30 | 2011-12-08 23:27:48 +0100 | [diff] [blame] | 355 | arch_initcall(s3c64xx_pm_initcall); |