Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011-2014 Samsung Electronics Co., Ltd. |
| 3 | * http://www.samsung.com |
| 4 | * |
| 5 | * EXYNOS - Suspend support |
| 6 | * |
| 7 | * Based on arch/arm/mach-s3c2410/pm.c |
| 8 | * Copyright (c) 2006 Simtec Electronics |
| 9 | * Ben Dooks <ben@simtec.co.uk> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/suspend.h> |
| 18 | #include <linux/syscore_ops.h> |
| 19 | #include <linux/cpu_pm.h> |
| 20 | #include <linux/io.h> |
| 21 | #include <linux/irqchip/arm-gic.h> |
| 22 | #include <linux/err.h> |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 23 | #include <linux/regulator/machine.h> |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 24 | |
| 25 | #include <asm/cacheflush.h> |
| 26 | #include <asm/hardware/cache-l2x0.h> |
| 27 | #include <asm/firmware.h> |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 28 | #include <asm/mcpm.h> |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 29 | #include <asm/smp_scu.h> |
| 30 | #include <asm/suspend.h> |
| 31 | |
| 32 | #include <plat/pm-common.h> |
| 33 | #include <plat/regs-srom.h> |
| 34 | |
| 35 | #include "common.h" |
| 36 | #include "regs-pmu.h" |
| 37 | #include "regs-sys.h" |
Pankaj Dubey | 6b7bfd8 | 2014-11-07 09:26:47 +0900 | [diff] [blame] | 38 | #include "exynos-pmu.h" |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 39 | |
| 40 | #define S5P_CHECK_SLEEP 0x00000BAD |
| 41 | |
| 42 | #define REG_TABLE_END (-1U) |
| 43 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 44 | #define EXYNOS5420_CPU_STATE 0x28 |
| 45 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 46 | /** |
| 47 | * struct exynos_wkup_irq - Exynos GIC to PMU IRQ mapping |
| 48 | * @hwirq: Hardware IRQ signal of the GIC |
| 49 | * @mask: Mask in PMU wake-up mask register |
| 50 | */ |
| 51 | struct exynos_wkup_irq { |
| 52 | unsigned int hwirq; |
| 53 | u32 mask; |
| 54 | }; |
| 55 | |
| 56 | static struct sleep_save exynos5_sys_save[] = { |
| 57 | SAVE_ITEM(EXYNOS5_SYS_I2C_CFG), |
| 58 | }; |
| 59 | |
| 60 | static struct sleep_save exynos_core_save[] = { |
| 61 | /* SROM side */ |
| 62 | SAVE_ITEM(S5P_SROM_BW), |
| 63 | SAVE_ITEM(S5P_SROM_BC0), |
| 64 | SAVE_ITEM(S5P_SROM_BC1), |
| 65 | SAVE_ITEM(S5P_SROM_BC2), |
| 66 | SAVE_ITEM(S5P_SROM_BC3), |
| 67 | }; |
| 68 | |
| 69 | struct exynos_pm_data { |
| 70 | const struct exynos_wkup_irq *wkup_irq; |
| 71 | struct sleep_save *extra_save; |
| 72 | int num_extra_save; |
| 73 | unsigned int wake_disable_mask; |
| 74 | unsigned int *release_ret_regs; |
| 75 | |
| 76 | void (*pm_prepare)(void); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 77 | void (*pm_resume_prepare)(void); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 78 | void (*pm_resume)(void); |
| 79 | int (*pm_suspend)(void); |
| 80 | int (*cpu_suspend)(unsigned long); |
| 81 | }; |
| 82 | |
| 83 | struct exynos_pm_data *pm_data; |
| 84 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 85 | static int exynos5420_cpu_state; |
| 86 | static unsigned int exynos_pmu_spare3; |
| 87 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 88 | /* |
| 89 | * GIC wake-up support |
| 90 | */ |
| 91 | |
| 92 | static u32 exynos_irqwake_intmask = 0xffffffff; |
| 93 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 94 | static const struct exynos_wkup_irq exynos3250_wkup_irq[] = { |
| 95 | { 73, BIT(1) }, /* RTC alarm */ |
| 96 | { 74, BIT(2) }, /* RTC tick */ |
| 97 | { /* sentinel */ }, |
| 98 | }; |
| 99 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 100 | static const struct exynos_wkup_irq exynos4_wkup_irq[] = { |
| 101 | { 76, BIT(1) }, /* RTC alarm */ |
| 102 | { 77, BIT(2) }, /* RTC tick */ |
| 103 | { /* sentinel */ }, |
| 104 | }; |
| 105 | |
| 106 | static const struct exynos_wkup_irq exynos5250_wkup_irq[] = { |
| 107 | { 75, BIT(1) }, /* RTC alarm */ |
| 108 | { 76, BIT(2) }, /* RTC tick */ |
| 109 | { /* sentinel */ }, |
| 110 | }; |
| 111 | |
| 112 | unsigned int exynos_release_ret_regs[] = { |
| 113 | S5P_PAD_RET_MAUDIO_OPTION, |
| 114 | S5P_PAD_RET_GPIO_OPTION, |
| 115 | S5P_PAD_RET_UART_OPTION, |
| 116 | S5P_PAD_RET_MMCA_OPTION, |
| 117 | S5P_PAD_RET_MMCB_OPTION, |
| 118 | S5P_PAD_RET_EBIA_OPTION, |
| 119 | S5P_PAD_RET_EBIB_OPTION, |
| 120 | REG_TABLE_END, |
| 121 | }; |
| 122 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 123 | unsigned int exynos3250_release_ret_regs[] = { |
| 124 | S5P_PAD_RET_MAUDIO_OPTION, |
| 125 | S5P_PAD_RET_GPIO_OPTION, |
| 126 | S5P_PAD_RET_UART_OPTION, |
| 127 | S5P_PAD_RET_MMCA_OPTION, |
| 128 | S5P_PAD_RET_MMCB_OPTION, |
| 129 | S5P_PAD_RET_EBIA_OPTION, |
| 130 | S5P_PAD_RET_EBIB_OPTION, |
| 131 | S5P_PAD_RET_MMC2_OPTION, |
| 132 | S5P_PAD_RET_SPI_OPTION, |
| 133 | REG_TABLE_END, |
| 134 | }; |
| 135 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 136 | unsigned int exynos5420_release_ret_regs[] = { |
| 137 | EXYNOS_PAD_RET_DRAM_OPTION, |
| 138 | EXYNOS_PAD_RET_MAUDIO_OPTION, |
| 139 | EXYNOS_PAD_RET_JTAG_OPTION, |
| 140 | EXYNOS5420_PAD_RET_GPIO_OPTION, |
| 141 | EXYNOS5420_PAD_RET_UART_OPTION, |
| 142 | EXYNOS5420_PAD_RET_MMCA_OPTION, |
| 143 | EXYNOS5420_PAD_RET_MMCB_OPTION, |
| 144 | EXYNOS5420_PAD_RET_MMCC_OPTION, |
| 145 | EXYNOS5420_PAD_RET_HSI_OPTION, |
| 146 | EXYNOS_PAD_RET_EBIA_OPTION, |
| 147 | EXYNOS_PAD_RET_EBIB_OPTION, |
| 148 | EXYNOS5420_PAD_RET_SPI_OPTION, |
| 149 | EXYNOS5420_PAD_RET_DRAM_COREBLK_OPTION, |
| 150 | REG_TABLE_END, |
| 151 | }; |
| 152 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 153 | static int exynos_irq_set_wake(struct irq_data *data, unsigned int state) |
| 154 | { |
| 155 | const struct exynos_wkup_irq *wkup_irq; |
| 156 | |
| 157 | if (!pm_data->wkup_irq) |
| 158 | return -ENOENT; |
| 159 | wkup_irq = pm_data->wkup_irq; |
| 160 | |
| 161 | while (wkup_irq->mask) { |
| 162 | if (wkup_irq->hwirq == data->hwirq) { |
| 163 | if (!state) |
| 164 | exynos_irqwake_intmask |= wkup_irq->mask; |
| 165 | else |
| 166 | exynos_irqwake_intmask &= ~wkup_irq->mask; |
| 167 | return 0; |
| 168 | } |
| 169 | ++wkup_irq; |
| 170 | } |
| 171 | |
| 172 | return -ENOENT; |
| 173 | } |
| 174 | |
| 175 | static int exynos_cpu_do_idle(void) |
| 176 | { |
| 177 | /* issue the standby signal into the pm unit. */ |
| 178 | cpu_do_idle(); |
| 179 | |
| 180 | pr_info("Failed to suspend the system\n"); |
| 181 | return 1; /* Aborting suspend */ |
| 182 | } |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 183 | static void exynos_flush_cache_all(void) |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 184 | { |
| 185 | flush_cache_all(); |
| 186 | outer_flush_all(); |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | static int exynos_cpu_suspend(unsigned long arg) |
| 190 | { |
| 191 | exynos_flush_cache_all(); |
| 192 | return exynos_cpu_do_idle(); |
| 193 | } |
| 194 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 195 | static int exynos3250_cpu_suspend(unsigned long arg) |
| 196 | { |
| 197 | flush_cache_all(); |
| 198 | return exynos_cpu_do_idle(); |
| 199 | } |
| 200 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 201 | static int exynos5420_cpu_suspend(unsigned long arg) |
| 202 | { |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 203 | /* MCPM works with HW CPU identifiers */ |
| 204 | unsigned int mpidr = read_cpuid_mpidr(); |
| 205 | unsigned int cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); |
| 206 | unsigned int cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); |
| 207 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 208 | __raw_writel(0x0, sysram_base_addr + EXYNOS5420_CPU_STATE); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 209 | |
| 210 | if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM)) { |
| 211 | mcpm_set_entry_vector(cpu, cluster, exynos_cpu_resume); |
| 212 | |
| 213 | /* |
| 214 | * Residency value passed to mcpm_cpu_suspend back-end |
| 215 | * has to be given clear semantics. Set to 0 as a |
| 216 | * temporary value. |
| 217 | */ |
| 218 | mcpm_cpu_suspend(0); |
| 219 | } |
| 220 | |
| 221 | pr_info("Failed to suspend the system\n"); |
| 222 | |
| 223 | /* return value != 0 means failure */ |
| 224 | return 1; |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | static void exynos_pm_set_wakeup_mask(void) |
| 228 | { |
| 229 | /* Set wake-up mask registers */ |
| 230 | pmu_raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK); |
| 231 | pmu_raw_writel(exynos_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK); |
| 232 | } |
| 233 | |
| 234 | static void exynos_pm_enter_sleep_mode(void) |
| 235 | { |
| 236 | /* Set value of power down register for sleep mode */ |
| 237 | exynos_sys_powerdown_conf(SYS_SLEEP); |
| 238 | pmu_raw_writel(S5P_CHECK_SLEEP, S5P_INFORM1); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static void exynos_pm_prepare(void) |
| 242 | { |
| 243 | /* Set wake-up mask registers */ |
| 244 | exynos_pm_set_wakeup_mask(); |
| 245 | |
| 246 | s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 247 | |
| 248 | if (pm_data->extra_save) |
| 249 | s3c_pm_do_save(pm_data->extra_save, |
| 250 | pm_data->num_extra_save); |
| 251 | |
| 252 | exynos_pm_enter_sleep_mode(); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 253 | |
| 254 | /* ensure at least INFORM0 has the resume address */ |
| 255 | pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 256 | } |
| 257 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 258 | static void exynos3250_pm_prepare(void) |
| 259 | { |
| 260 | unsigned int tmp; |
| 261 | |
| 262 | /* Set wake-up mask registers */ |
| 263 | exynos_pm_set_wakeup_mask(); |
| 264 | |
| 265 | tmp = pmu_raw_readl(EXYNOS3_ARM_L2_OPTION); |
| 266 | tmp &= ~EXYNOS5_OPTION_USE_RETENTION; |
| 267 | pmu_raw_writel(tmp, EXYNOS3_ARM_L2_OPTION); |
| 268 | |
| 269 | exynos_pm_enter_sleep_mode(); |
| 270 | |
| 271 | /* ensure at least INFORM0 has the resume address */ |
| 272 | pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0); |
| 273 | } |
| 274 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 275 | static void exynos5420_pm_prepare(void) |
| 276 | { |
| 277 | unsigned int tmp; |
| 278 | |
| 279 | /* Set wake-up mask registers */ |
| 280 | exynos_pm_set_wakeup_mask(); |
| 281 | |
| 282 | s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 283 | |
| 284 | exynos_pmu_spare3 = pmu_raw_readl(S5P_PMU_SPARE3); |
| 285 | /* |
| 286 | * The cpu state needs to be saved and restored so that the |
| 287 | * secondary CPUs will enter low power start. Though the U-Boot |
| 288 | * is setting the cpu state with low power flag, the kernel |
| 289 | * needs to restore it back in case, the primary cpu fails to |
| 290 | * suspend for any reason. |
| 291 | */ |
| 292 | exynos5420_cpu_state = __raw_readl(sysram_base_addr + |
| 293 | EXYNOS5420_CPU_STATE); |
| 294 | |
| 295 | exynos_pm_enter_sleep_mode(); |
| 296 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 297 | /* ensure at least INFORM0 has the resume address */ |
| 298 | if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM)) |
| 299 | pmu_raw_writel(virt_to_phys(mcpm_entry_point), S5P_INFORM0); |
| 300 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 301 | tmp = pmu_raw_readl(EXYNOS5_ARM_L2_OPTION); |
| 302 | tmp &= ~EXYNOS5_USE_RETENTION; |
| 303 | pmu_raw_writel(tmp, EXYNOS5_ARM_L2_OPTION); |
| 304 | |
| 305 | tmp = pmu_raw_readl(EXYNOS5420_SFR_AXI_CGDIS1); |
| 306 | tmp |= EXYNOS5420_UFS; |
| 307 | pmu_raw_writel(tmp, EXYNOS5420_SFR_AXI_CGDIS1); |
| 308 | |
| 309 | tmp = pmu_raw_readl(EXYNOS5420_ARM_COMMON_OPTION); |
| 310 | tmp &= ~EXYNOS5420_L2RSTDISABLE_VALUE; |
| 311 | pmu_raw_writel(tmp, EXYNOS5420_ARM_COMMON_OPTION); |
| 312 | |
| 313 | tmp = pmu_raw_readl(EXYNOS5420_FSYS2_OPTION); |
| 314 | tmp |= EXYNOS5420_EMULATION; |
| 315 | pmu_raw_writel(tmp, EXYNOS5420_FSYS2_OPTION); |
| 316 | |
| 317 | tmp = pmu_raw_readl(EXYNOS5420_PSGEN_OPTION); |
| 318 | tmp |= EXYNOS5420_EMULATION; |
| 319 | pmu_raw_writel(tmp, EXYNOS5420_PSGEN_OPTION); |
| 320 | } |
| 321 | |
| 322 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 323 | static int exynos_pm_suspend(void) |
| 324 | { |
| 325 | exynos_pm_central_suspend(); |
| 326 | |
| 327 | if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) |
| 328 | exynos_cpu_save_register(); |
| 329 | |
| 330 | return 0; |
| 331 | } |
| 332 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 333 | static int exynos5420_pm_suspend(void) |
| 334 | { |
| 335 | u32 this_cluster; |
| 336 | |
| 337 | exynos_pm_central_suspend(); |
| 338 | |
| 339 | /* Setting SEQ_OPTION register */ |
| 340 | |
| 341 | this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 1); |
| 342 | if (!this_cluster) |
| 343 | pmu_raw_writel(EXYNOS5420_ARM_USE_STANDBY_WFI0, |
| 344 | S5P_CENTRAL_SEQ_OPTION); |
| 345 | else |
| 346 | pmu_raw_writel(EXYNOS5420_KFC_USE_STANDBY_WFI0, |
| 347 | S5P_CENTRAL_SEQ_OPTION); |
| 348 | return 0; |
| 349 | } |
| 350 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 351 | static void exynos_pm_release_retention(void) |
| 352 | { |
| 353 | unsigned int i; |
| 354 | |
| 355 | for (i = 0; (pm_data->release_ret_regs[i] != REG_TABLE_END); i++) |
| 356 | pmu_raw_writel(EXYNOS_WAKEUP_FROM_LOWPWR, |
| 357 | pm_data->release_ret_regs[i]); |
| 358 | } |
| 359 | |
| 360 | static void exynos_pm_resume(void) |
| 361 | { |
| 362 | u32 cpuid = read_cpuid_part(); |
| 363 | |
| 364 | if (exynos_pm_central_resume()) |
| 365 | goto early_wakeup; |
| 366 | |
| 367 | /* For release retention */ |
| 368 | exynos_pm_release_retention(); |
| 369 | |
| 370 | if (pm_data->extra_save) |
| 371 | s3c_pm_do_restore_core(pm_data->extra_save, |
| 372 | pm_data->num_extra_save); |
| 373 | |
| 374 | s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 375 | |
| 376 | if (cpuid == ARM_CPU_PART_CORTEX_A9) |
| 377 | scu_enable(S5P_VA_SCU); |
| 378 | |
| 379 | if (call_firmware_op(resume) == -ENOSYS |
| 380 | && cpuid == ARM_CPU_PART_CORTEX_A9) |
| 381 | exynos_cpu_restore_register(); |
| 382 | |
| 383 | early_wakeup: |
| 384 | |
| 385 | /* Clear SLEEP mode set in INFORM1 */ |
| 386 | pmu_raw_writel(0x0, S5P_INFORM1); |
| 387 | } |
| 388 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 389 | static void exynos3250_pm_resume(void) |
| 390 | { |
| 391 | u32 cpuid = read_cpuid_part(); |
| 392 | |
| 393 | if (exynos_pm_central_resume()) |
| 394 | goto early_wakeup; |
| 395 | |
| 396 | /* For release retention */ |
| 397 | exynos_pm_release_retention(); |
| 398 | |
| 399 | pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); |
| 400 | |
| 401 | if (call_firmware_op(resume) == -ENOSYS |
| 402 | && cpuid == ARM_CPU_PART_CORTEX_A9) |
| 403 | exynos_cpu_restore_register(); |
| 404 | |
| 405 | early_wakeup: |
| 406 | |
| 407 | /* Clear SLEEP mode set in INFORM1 */ |
| 408 | pmu_raw_writel(0x0, S5P_INFORM1); |
| 409 | } |
| 410 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 411 | static void exynos5420_prepare_pm_resume(void) |
| 412 | { |
| 413 | if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM)) |
| 414 | WARN_ON(mcpm_cpu_powered_up()); |
| 415 | } |
| 416 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 417 | static void exynos5420_pm_resume(void) |
| 418 | { |
| 419 | unsigned long tmp; |
| 420 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 421 | /* Restore the CPU0 low power state register */ |
| 422 | tmp = pmu_raw_readl(EXYNOS5_ARM_CORE0_SYS_PWR_REG); |
| 423 | pmu_raw_writel(tmp | S5P_CORE_LOCAL_PWR_EN, |
| 424 | EXYNOS5_ARM_CORE0_SYS_PWR_REG); |
| 425 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 426 | /* Restore the sysram cpu state register */ |
| 427 | __raw_writel(exynos5420_cpu_state, |
| 428 | sysram_base_addr + EXYNOS5420_CPU_STATE); |
| 429 | |
| 430 | pmu_raw_writel(EXYNOS5420_USE_STANDBY_WFI_ALL, |
| 431 | S5P_CENTRAL_SEQ_OPTION); |
| 432 | |
| 433 | if (exynos_pm_central_resume()) |
| 434 | goto early_wakeup; |
| 435 | |
| 436 | /* For release retention */ |
| 437 | exynos_pm_release_retention(); |
| 438 | |
| 439 | pmu_raw_writel(exynos_pmu_spare3, S5P_PMU_SPARE3); |
| 440 | |
| 441 | s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 442 | |
| 443 | early_wakeup: |
| 444 | |
| 445 | tmp = pmu_raw_readl(EXYNOS5420_SFR_AXI_CGDIS1); |
| 446 | tmp &= ~EXYNOS5420_UFS; |
| 447 | pmu_raw_writel(tmp, EXYNOS5420_SFR_AXI_CGDIS1); |
| 448 | |
| 449 | tmp = pmu_raw_readl(EXYNOS5420_FSYS2_OPTION); |
| 450 | tmp &= ~EXYNOS5420_EMULATION; |
| 451 | pmu_raw_writel(tmp, EXYNOS5420_FSYS2_OPTION); |
| 452 | |
| 453 | tmp = pmu_raw_readl(EXYNOS5420_PSGEN_OPTION); |
| 454 | tmp &= ~EXYNOS5420_EMULATION; |
| 455 | pmu_raw_writel(tmp, EXYNOS5420_PSGEN_OPTION); |
| 456 | |
| 457 | /* Clear SLEEP mode set in INFORM1 */ |
| 458 | pmu_raw_writel(0x0, S5P_INFORM1); |
| 459 | } |
| 460 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 461 | /* |
| 462 | * Suspend Ops |
| 463 | */ |
| 464 | |
| 465 | static int exynos_suspend_enter(suspend_state_t state) |
| 466 | { |
| 467 | int ret; |
| 468 | |
| 469 | s3c_pm_debug_init(); |
| 470 | |
| 471 | S3C_PMDBG("%s: suspending the system...\n", __func__); |
| 472 | |
| 473 | S3C_PMDBG("%s: wakeup masks: %08x,%08x\n", __func__, |
| 474 | exynos_irqwake_intmask, exynos_get_eint_wake_mask()); |
| 475 | |
| 476 | if (exynos_irqwake_intmask == -1U |
| 477 | && exynos_get_eint_wake_mask() == -1U) { |
| 478 | pr_err("%s: No wake-up sources!\n", __func__); |
| 479 | pr_err("%s: Aborting sleep\n", __func__); |
| 480 | return -EINVAL; |
| 481 | } |
| 482 | |
| 483 | s3c_pm_save_uarts(); |
| 484 | if (pm_data->pm_prepare) |
| 485 | pm_data->pm_prepare(); |
| 486 | flush_cache_all(); |
| 487 | s3c_pm_check_store(); |
| 488 | |
| 489 | ret = call_firmware_op(suspend); |
| 490 | if (ret == -ENOSYS) |
| 491 | ret = cpu_suspend(0, pm_data->cpu_suspend); |
| 492 | if (ret) |
| 493 | return ret; |
| 494 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 495 | if (pm_data->pm_resume_prepare) |
| 496 | pm_data->pm_resume_prepare(); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 497 | s3c_pm_restore_uarts(); |
| 498 | |
| 499 | S3C_PMDBG("%s: wakeup stat: %08x\n", __func__, |
| 500 | pmu_raw_readl(S5P_WAKEUP_STAT)); |
| 501 | |
| 502 | s3c_pm_check_restore(); |
| 503 | |
| 504 | S3C_PMDBG("%s: resuming the system...\n", __func__); |
| 505 | |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static int exynos_suspend_prepare(void) |
| 510 | { |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 511 | int ret; |
| 512 | |
| 513 | /* |
| 514 | * REVISIT: It would be better if struct platform_suspend_ops |
| 515 | * .prepare handler get the suspend_state_t as a parameter to |
| 516 | * avoid hard-coding the suspend to mem state. It's safe to do |
| 517 | * it now only because the suspend_valid_only_mem function is |
| 518 | * used as the .valid callback used to check if a given state |
| 519 | * is supported by the platform anyways. |
| 520 | */ |
| 521 | ret = regulator_suspend_prepare(PM_SUSPEND_MEM); |
| 522 | if (ret) { |
| 523 | pr_err("Failed to prepare regulators for suspend (%d)\n", ret); |
| 524 | return ret; |
| 525 | } |
| 526 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 527 | s3c_pm_check_prepare(); |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | static void exynos_suspend_finish(void) |
| 533 | { |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 534 | int ret; |
| 535 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 536 | s3c_pm_check_cleanup(); |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 537 | |
| 538 | ret = regulator_suspend_finish(); |
| 539 | if (ret) |
| 540 | pr_warn("Failed to resume regulators from suspend (%d)\n", ret); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | static const struct platform_suspend_ops exynos_suspend_ops = { |
| 544 | .enter = exynos_suspend_enter, |
| 545 | .prepare = exynos_suspend_prepare, |
| 546 | .finish = exynos_suspend_finish, |
| 547 | .valid = suspend_valid_only_mem, |
| 548 | }; |
| 549 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 550 | static const struct exynos_pm_data exynos3250_pm_data = { |
| 551 | .wkup_irq = exynos3250_wkup_irq, |
| 552 | .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), |
| 553 | .release_ret_regs = exynos3250_release_ret_regs, |
| 554 | .pm_suspend = exynos_pm_suspend, |
| 555 | .pm_resume = exynos3250_pm_resume, |
| 556 | .pm_prepare = exynos3250_pm_prepare, |
| 557 | .cpu_suspend = exynos3250_cpu_suspend, |
| 558 | }; |
| 559 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 560 | static const struct exynos_pm_data exynos4_pm_data = { |
| 561 | .wkup_irq = exynos4_wkup_irq, |
| 562 | .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), |
| 563 | .release_ret_regs = exynos_release_ret_regs, |
| 564 | .pm_suspend = exynos_pm_suspend, |
| 565 | .pm_resume = exynos_pm_resume, |
| 566 | .pm_prepare = exynos_pm_prepare, |
| 567 | .cpu_suspend = exynos_cpu_suspend, |
| 568 | }; |
| 569 | |
| 570 | static const struct exynos_pm_data exynos5250_pm_data = { |
| 571 | .wkup_irq = exynos5250_wkup_irq, |
| 572 | .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), |
| 573 | .release_ret_regs = exynos_release_ret_regs, |
| 574 | .extra_save = exynos5_sys_save, |
| 575 | .num_extra_save = ARRAY_SIZE(exynos5_sys_save), |
| 576 | .pm_suspend = exynos_pm_suspend, |
| 577 | .pm_resume = exynos_pm_resume, |
| 578 | .pm_prepare = exynos_pm_prepare, |
| 579 | .cpu_suspend = exynos_cpu_suspend, |
| 580 | }; |
| 581 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 582 | static struct exynos_pm_data exynos5420_pm_data = { |
| 583 | .wkup_irq = exynos5250_wkup_irq, |
| 584 | .wake_disable_mask = (0x7F << 7) | (0x1F << 1), |
| 585 | .release_ret_regs = exynos5420_release_ret_regs, |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 586 | .pm_resume_prepare = exynos5420_prepare_pm_resume, |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 587 | .pm_resume = exynos5420_pm_resume, |
| 588 | .pm_suspend = exynos5420_pm_suspend, |
| 589 | .pm_prepare = exynos5420_pm_prepare, |
| 590 | .cpu_suspend = exynos5420_cpu_suspend, |
| 591 | }; |
| 592 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 593 | static struct of_device_id exynos_pmu_of_device_ids[] = { |
| 594 | { |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame^] | 595 | .compatible = "samsung,exynos3250-pmu", |
| 596 | .data = &exynos3250_pm_data, |
| 597 | }, { |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 598 | .compatible = "samsung,exynos4210-pmu", |
| 599 | .data = &exynos4_pm_data, |
| 600 | }, { |
| 601 | .compatible = "samsung,exynos4212-pmu", |
| 602 | .data = &exynos4_pm_data, |
| 603 | }, { |
| 604 | .compatible = "samsung,exynos4412-pmu", |
| 605 | .data = &exynos4_pm_data, |
| 606 | }, { |
| 607 | .compatible = "samsung,exynos5250-pmu", |
| 608 | .data = &exynos5250_pm_data, |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 609 | }, { |
| 610 | .compatible = "samsung,exynos5420-pmu", |
| 611 | .data = &exynos5420_pm_data, |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 612 | }, |
| 613 | { /*sentinel*/ }, |
| 614 | }; |
| 615 | |
| 616 | static struct syscore_ops exynos_pm_syscore_ops; |
| 617 | |
| 618 | void __init exynos_pm_init(void) |
| 619 | { |
| 620 | const struct of_device_id *match; |
| 621 | u32 tmp; |
| 622 | |
| 623 | of_find_matching_node_and_match(NULL, exynos_pmu_of_device_ids, &match); |
| 624 | if (!match) { |
| 625 | pr_err("Failed to find PMU node\n"); |
| 626 | return; |
| 627 | } |
| 628 | pm_data = (struct exynos_pm_data *) match->data; |
| 629 | |
| 630 | /* Platform-specific GIC callback */ |
| 631 | gic_arch_extn.irq_set_wake = exynos_irq_set_wake; |
| 632 | |
| 633 | /* All wakeup disable */ |
| 634 | tmp = pmu_raw_readl(S5P_WAKEUP_MASK); |
| 635 | tmp |= pm_data->wake_disable_mask; |
| 636 | pmu_raw_writel(tmp, S5P_WAKEUP_MASK); |
| 637 | |
| 638 | exynos_pm_syscore_ops.suspend = pm_data->pm_suspend; |
| 639 | exynos_pm_syscore_ops.resume = pm_data->pm_resume; |
| 640 | |
| 641 | register_syscore_ops(&exynos_pm_syscore_ops); |
| 642 | suspend_set_ops(&exynos_suspend_ops); |
| 643 | } |