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> |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 21 | #include <linux/irq.h> |
| 22 | #include <linux/irqdomain.h> |
| 23 | #include <linux/of_address.h> |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 24 | #include <linux/err.h> |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 25 | #include <linux/regulator/machine.h> |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 26 | |
| 27 | #include <asm/cacheflush.h> |
| 28 | #include <asm/hardware/cache-l2x0.h> |
| 29 | #include <asm/firmware.h> |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 30 | #include <asm/mcpm.h> |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 31 | #include <asm/smp_scu.h> |
| 32 | #include <asm/suspend.h> |
| 33 | |
| 34 | #include <plat/pm-common.h> |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 35 | |
| 36 | #include "common.h" |
Pankaj Dubey | 6b7bfd8 | 2014-11-07 09:26:47 +0900 | [diff] [blame] | 37 | #include "exynos-pmu.h" |
Kukjin Kim | 8ace438 | 2015-07-30 02:00:35 +0900 | [diff] [blame] | 38 | #include "regs-pmu.h" |
| 39 | #include "regs-srom.h" |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 40 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 41 | #define REG_TABLE_END (-1U) |
| 42 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 43 | #define EXYNOS5420_CPU_STATE 0x28 |
| 44 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 45 | /** |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 46 | * struct exynos_wkup_irq - PMU IRQ to mask mapping |
| 47 | * @hwirq: Hardware IRQ signal of the PMU |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 48 | * @mask: Mask in PMU wake-up mask register |
| 49 | */ |
| 50 | struct exynos_wkup_irq { |
| 51 | unsigned int hwirq; |
| 52 | u32 mask; |
| 53 | }; |
| 54 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 55 | static struct sleep_save exynos_core_save[] = { |
| 56 | /* SROM side */ |
| 57 | SAVE_ITEM(S5P_SROM_BW), |
| 58 | SAVE_ITEM(S5P_SROM_BC0), |
| 59 | SAVE_ITEM(S5P_SROM_BC1), |
| 60 | SAVE_ITEM(S5P_SROM_BC2), |
| 61 | SAVE_ITEM(S5P_SROM_BC3), |
| 62 | }; |
| 63 | |
| 64 | struct exynos_pm_data { |
| 65 | const struct exynos_wkup_irq *wkup_irq; |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 66 | unsigned int wake_disable_mask; |
| 67 | unsigned int *release_ret_regs; |
| 68 | |
| 69 | void (*pm_prepare)(void); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 70 | void (*pm_resume_prepare)(void); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 71 | void (*pm_resume)(void); |
| 72 | int (*pm_suspend)(void); |
| 73 | int (*cpu_suspend)(unsigned long); |
| 74 | }; |
| 75 | |
Krzysztof Kozlowski | 1cd3de0 | 2015-03-18 02:34:38 +0900 | [diff] [blame] | 76 | static const struct exynos_pm_data *pm_data; |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 77 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 78 | static int exynos5420_cpu_state; |
| 79 | static unsigned int exynos_pmu_spare3; |
| 80 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 81 | /* |
| 82 | * GIC wake-up support |
| 83 | */ |
| 84 | |
| 85 | static u32 exynos_irqwake_intmask = 0xffffffff; |
| 86 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 87 | static const struct exynos_wkup_irq exynos3250_wkup_irq[] = { |
Marc Zyngier | fe93122 | 2015-04-22 18:40:52 +0100 | [diff] [blame] | 88 | { 73, BIT(1) }, /* RTC alarm */ |
| 89 | { 74, BIT(2) }, /* RTC tick */ |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 90 | { /* sentinel */ }, |
| 91 | }; |
| 92 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 93 | static const struct exynos_wkup_irq exynos4_wkup_irq[] = { |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 94 | { 44, BIT(1) }, /* RTC alarm */ |
| 95 | { 45, BIT(2) }, /* RTC tick */ |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 96 | { /* sentinel */ }, |
| 97 | }; |
| 98 | |
| 99 | static const struct exynos_wkup_irq exynos5250_wkup_irq[] = { |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 100 | { 43, BIT(1) }, /* RTC alarm */ |
| 101 | { 44, BIT(2) }, /* RTC tick */ |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 102 | { /* sentinel */ }, |
| 103 | }; |
| 104 | |
Krzysztof Kozlowski | 8c8a251 | 2015-03-18 02:32:40 +0900 | [diff] [blame] | 105 | static unsigned int exynos_release_ret_regs[] = { |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 106 | S5P_PAD_RET_MAUDIO_OPTION, |
| 107 | S5P_PAD_RET_GPIO_OPTION, |
| 108 | S5P_PAD_RET_UART_OPTION, |
| 109 | S5P_PAD_RET_MMCA_OPTION, |
| 110 | S5P_PAD_RET_MMCB_OPTION, |
| 111 | S5P_PAD_RET_EBIA_OPTION, |
| 112 | S5P_PAD_RET_EBIB_OPTION, |
| 113 | REG_TABLE_END, |
| 114 | }; |
| 115 | |
Krzysztof Kozlowski | 8c8a251 | 2015-03-18 02:32:40 +0900 | [diff] [blame] | 116 | static unsigned int exynos3250_release_ret_regs[] = { |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 117 | S5P_PAD_RET_MAUDIO_OPTION, |
| 118 | S5P_PAD_RET_GPIO_OPTION, |
| 119 | S5P_PAD_RET_UART_OPTION, |
| 120 | S5P_PAD_RET_MMCA_OPTION, |
| 121 | S5P_PAD_RET_MMCB_OPTION, |
| 122 | S5P_PAD_RET_EBIA_OPTION, |
| 123 | S5P_PAD_RET_EBIB_OPTION, |
| 124 | S5P_PAD_RET_MMC2_OPTION, |
| 125 | S5P_PAD_RET_SPI_OPTION, |
| 126 | REG_TABLE_END, |
| 127 | }; |
| 128 | |
Krzysztof Kozlowski | 8c8a251 | 2015-03-18 02:32:40 +0900 | [diff] [blame] | 129 | static unsigned int exynos5420_release_ret_regs[] = { |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 130 | EXYNOS_PAD_RET_DRAM_OPTION, |
| 131 | EXYNOS_PAD_RET_MAUDIO_OPTION, |
| 132 | EXYNOS_PAD_RET_JTAG_OPTION, |
| 133 | EXYNOS5420_PAD_RET_GPIO_OPTION, |
| 134 | EXYNOS5420_PAD_RET_UART_OPTION, |
| 135 | EXYNOS5420_PAD_RET_MMCA_OPTION, |
| 136 | EXYNOS5420_PAD_RET_MMCB_OPTION, |
| 137 | EXYNOS5420_PAD_RET_MMCC_OPTION, |
| 138 | EXYNOS5420_PAD_RET_HSI_OPTION, |
| 139 | EXYNOS_PAD_RET_EBIA_OPTION, |
| 140 | EXYNOS_PAD_RET_EBIB_OPTION, |
| 141 | EXYNOS5420_PAD_RET_SPI_OPTION, |
| 142 | EXYNOS5420_PAD_RET_DRAM_COREBLK_OPTION, |
| 143 | REG_TABLE_END, |
| 144 | }; |
| 145 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 146 | static int exynos_irq_set_wake(struct irq_data *data, unsigned int state) |
| 147 | { |
| 148 | const struct exynos_wkup_irq *wkup_irq; |
| 149 | |
| 150 | if (!pm_data->wkup_irq) |
| 151 | return -ENOENT; |
| 152 | wkup_irq = pm_data->wkup_irq; |
| 153 | |
| 154 | while (wkup_irq->mask) { |
| 155 | if (wkup_irq->hwirq == data->hwirq) { |
| 156 | if (!state) |
| 157 | exynos_irqwake_intmask |= wkup_irq->mask; |
| 158 | else |
| 159 | exynos_irqwake_intmask &= ~wkup_irq->mask; |
| 160 | return 0; |
| 161 | } |
| 162 | ++wkup_irq; |
| 163 | } |
| 164 | |
| 165 | return -ENOENT; |
| 166 | } |
| 167 | |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 168 | static struct irq_chip exynos_pmu_chip = { |
| 169 | .name = "PMU", |
| 170 | .irq_eoi = irq_chip_eoi_parent, |
| 171 | .irq_mask = irq_chip_mask_parent, |
| 172 | .irq_unmask = irq_chip_unmask_parent, |
| 173 | .irq_retrigger = irq_chip_retrigger_hierarchy, |
| 174 | .irq_set_wake = exynos_irq_set_wake, |
| 175 | #ifdef CONFIG_SMP |
| 176 | .irq_set_affinity = irq_chip_set_affinity_parent, |
| 177 | #endif |
| 178 | }; |
| 179 | |
| 180 | static int exynos_pmu_domain_xlate(struct irq_domain *domain, |
| 181 | struct device_node *controller, |
| 182 | const u32 *intspec, |
| 183 | unsigned int intsize, |
| 184 | unsigned long *out_hwirq, |
| 185 | unsigned int *out_type) |
| 186 | { |
| 187 | if (domain->of_node != controller) |
| 188 | return -EINVAL; /* Shouldn't happen, really... */ |
| 189 | if (intsize != 3) |
| 190 | return -EINVAL; /* Not GIC compliant */ |
| 191 | if (intspec[0] != 0) |
| 192 | return -EINVAL; /* No PPI should point to this domain */ |
| 193 | |
| 194 | *out_hwirq = intspec[1]; |
| 195 | *out_type = intspec[2]; |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | static int exynos_pmu_domain_alloc(struct irq_domain *domain, |
| 200 | unsigned int virq, |
| 201 | unsigned int nr_irqs, void *data) |
| 202 | { |
| 203 | struct of_phandle_args *args = data; |
| 204 | struct of_phandle_args parent_args; |
| 205 | irq_hw_number_t hwirq; |
| 206 | int i; |
| 207 | |
| 208 | if (args->args_count != 3) |
| 209 | return -EINVAL; /* Not GIC compliant */ |
| 210 | if (args->args[0] != 0) |
| 211 | return -EINVAL; /* No PPI should point to this domain */ |
| 212 | |
| 213 | hwirq = args->args[1]; |
| 214 | |
| 215 | for (i = 0; i < nr_irqs; i++) |
| 216 | irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i, |
| 217 | &exynos_pmu_chip, NULL); |
| 218 | |
| 219 | parent_args = *args; |
| 220 | parent_args.np = domain->parent->of_node; |
| 221 | return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args); |
| 222 | } |
| 223 | |
Krzysztof Kozlowski | fc4a2cc | 2015-04-27 19:48:59 +0900 | [diff] [blame] | 224 | static const struct irq_domain_ops exynos_pmu_domain_ops = { |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 225 | .xlate = exynos_pmu_domain_xlate, |
| 226 | .alloc = exynos_pmu_domain_alloc, |
| 227 | .free = irq_domain_free_irqs_common, |
| 228 | }; |
| 229 | |
| 230 | static int __init exynos_pmu_irq_init(struct device_node *node, |
| 231 | struct device_node *parent) |
| 232 | { |
| 233 | struct irq_domain *parent_domain, *domain; |
| 234 | |
| 235 | if (!parent) { |
| 236 | pr_err("%s: no parent, giving up\n", node->full_name); |
| 237 | return -ENODEV; |
| 238 | } |
| 239 | |
| 240 | parent_domain = irq_find_host(parent); |
| 241 | if (!parent_domain) { |
| 242 | pr_err("%s: unable to obtain parent domain\n", node->full_name); |
| 243 | return -ENXIO; |
| 244 | } |
| 245 | |
| 246 | pmu_base_addr = of_iomap(node, 0); |
| 247 | |
| 248 | if (!pmu_base_addr) { |
| 249 | pr_err("%s: failed to find exynos pmu register\n", |
| 250 | node->full_name); |
| 251 | return -ENOMEM; |
| 252 | } |
| 253 | |
| 254 | domain = irq_domain_add_hierarchy(parent_domain, 0, 0, |
| 255 | node, &exynos_pmu_domain_ops, |
| 256 | NULL); |
| 257 | if (!domain) { |
| 258 | iounmap(pmu_base_addr); |
| 259 | return -ENOMEM; |
| 260 | } |
| 261 | |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | #define EXYNOS_PMU_IRQ(symbol, name) OF_DECLARE_2(irqchip, symbol, name, exynos_pmu_irq_init) |
| 266 | |
| 267 | EXYNOS_PMU_IRQ(exynos3250_pmu_irq, "samsung,exynos3250-pmu"); |
| 268 | EXYNOS_PMU_IRQ(exynos4210_pmu_irq, "samsung,exynos4210-pmu"); |
| 269 | EXYNOS_PMU_IRQ(exynos4212_pmu_irq, "samsung,exynos4212-pmu"); |
| 270 | EXYNOS_PMU_IRQ(exynos4412_pmu_irq, "samsung,exynos4412-pmu"); |
| 271 | EXYNOS_PMU_IRQ(exynos4415_pmu_irq, "samsung,exynos4415-pmu"); |
| 272 | EXYNOS_PMU_IRQ(exynos5250_pmu_irq, "samsung,exynos5250-pmu"); |
| 273 | EXYNOS_PMU_IRQ(exynos5420_pmu_irq, "samsung,exynos5420-pmu"); |
| 274 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 275 | static int exynos_cpu_do_idle(void) |
| 276 | { |
| 277 | /* issue the standby signal into the pm unit. */ |
| 278 | cpu_do_idle(); |
| 279 | |
| 280 | pr_info("Failed to suspend the system\n"); |
| 281 | return 1; /* Aborting suspend */ |
| 282 | } |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 283 | static void exynos_flush_cache_all(void) |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 284 | { |
| 285 | flush_cache_all(); |
| 286 | outer_flush_all(); |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static int exynos_cpu_suspend(unsigned long arg) |
| 290 | { |
| 291 | exynos_flush_cache_all(); |
| 292 | return exynos_cpu_do_idle(); |
| 293 | } |
| 294 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 295 | static int exynos3250_cpu_suspend(unsigned long arg) |
| 296 | { |
| 297 | flush_cache_all(); |
| 298 | return exynos_cpu_do_idle(); |
| 299 | } |
| 300 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 301 | static int exynos5420_cpu_suspend(unsigned long arg) |
| 302 | { |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 303 | /* MCPM works with HW CPU identifiers */ |
| 304 | unsigned int mpidr = read_cpuid_mpidr(); |
| 305 | unsigned int cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); |
| 306 | unsigned int cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); |
| 307 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 308 | __raw_writel(0x0, sysram_base_addr + EXYNOS5420_CPU_STATE); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 309 | |
| 310 | if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM)) { |
| 311 | mcpm_set_entry_vector(cpu, cluster, exynos_cpu_resume); |
Nicolas Pitre | 7895f73 | 2015-04-28 15:51:19 -0400 | [diff] [blame] | 312 | mcpm_cpu_suspend(); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | pr_info("Failed to suspend the system\n"); |
| 316 | |
| 317 | /* return value != 0 means failure */ |
| 318 | return 1; |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | static void exynos_pm_set_wakeup_mask(void) |
| 322 | { |
| 323 | /* Set wake-up mask registers */ |
| 324 | pmu_raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK); |
| 325 | pmu_raw_writel(exynos_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK); |
| 326 | } |
| 327 | |
| 328 | static void exynos_pm_enter_sleep_mode(void) |
| 329 | { |
| 330 | /* Set value of power down register for sleep mode */ |
| 331 | exynos_sys_powerdown_conf(SYS_SLEEP); |
Krzysztof Kozlowski | 054e6aa | 2015-06-14 13:38:23 +0900 | [diff] [blame] | 332 | pmu_raw_writel(EXYNOS_SLEEP_MAGIC, S5P_INFORM1); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | static void exynos_pm_prepare(void) |
| 336 | { |
Krzysztof Kozlowski | 6f02497 | 2015-03-11 11:13:57 +0100 | [diff] [blame] | 337 | exynos_set_delayed_reset_assertion(false); |
| 338 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 339 | /* Set wake-up mask registers */ |
| 340 | exynos_pm_set_wakeup_mask(); |
| 341 | |
| 342 | s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 343 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 344 | exynos_pm_enter_sleep_mode(); |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 345 | |
| 346 | /* ensure at least INFORM0 has the resume address */ |
| 347 | pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 348 | } |
| 349 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 350 | static void exynos3250_pm_prepare(void) |
| 351 | { |
| 352 | unsigned int tmp; |
| 353 | |
| 354 | /* Set wake-up mask registers */ |
| 355 | exynos_pm_set_wakeup_mask(); |
| 356 | |
| 357 | tmp = pmu_raw_readl(EXYNOS3_ARM_L2_OPTION); |
| 358 | tmp &= ~EXYNOS5_OPTION_USE_RETENTION; |
| 359 | pmu_raw_writel(tmp, EXYNOS3_ARM_L2_OPTION); |
| 360 | |
| 361 | exynos_pm_enter_sleep_mode(); |
| 362 | |
| 363 | /* ensure at least INFORM0 has the resume address */ |
| 364 | pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0); |
| 365 | } |
| 366 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 367 | static void exynos5420_pm_prepare(void) |
| 368 | { |
| 369 | unsigned int tmp; |
| 370 | |
| 371 | /* Set wake-up mask registers */ |
| 372 | exynos_pm_set_wakeup_mask(); |
| 373 | |
| 374 | s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 375 | |
| 376 | exynos_pmu_spare3 = pmu_raw_readl(S5P_PMU_SPARE3); |
| 377 | /* |
| 378 | * The cpu state needs to be saved and restored so that the |
| 379 | * secondary CPUs will enter low power start. Though the U-Boot |
| 380 | * is setting the cpu state with low power flag, the kernel |
| 381 | * needs to restore it back in case, the primary cpu fails to |
| 382 | * suspend for any reason. |
| 383 | */ |
| 384 | exynos5420_cpu_state = __raw_readl(sysram_base_addr + |
| 385 | EXYNOS5420_CPU_STATE); |
| 386 | |
| 387 | exynos_pm_enter_sleep_mode(); |
| 388 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 389 | /* ensure at least INFORM0 has the resume address */ |
| 390 | if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM)) |
| 391 | pmu_raw_writel(virt_to_phys(mcpm_entry_point), S5P_INFORM0); |
| 392 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 393 | tmp = pmu_raw_readl(EXYNOS5_ARM_L2_OPTION); |
| 394 | tmp &= ~EXYNOS5_USE_RETENTION; |
| 395 | pmu_raw_writel(tmp, EXYNOS5_ARM_L2_OPTION); |
| 396 | |
| 397 | tmp = pmu_raw_readl(EXYNOS5420_SFR_AXI_CGDIS1); |
| 398 | tmp |= EXYNOS5420_UFS; |
| 399 | pmu_raw_writel(tmp, EXYNOS5420_SFR_AXI_CGDIS1); |
| 400 | |
| 401 | tmp = pmu_raw_readl(EXYNOS5420_ARM_COMMON_OPTION); |
| 402 | tmp &= ~EXYNOS5420_L2RSTDISABLE_VALUE; |
| 403 | pmu_raw_writel(tmp, EXYNOS5420_ARM_COMMON_OPTION); |
| 404 | |
| 405 | tmp = pmu_raw_readl(EXYNOS5420_FSYS2_OPTION); |
| 406 | tmp |= EXYNOS5420_EMULATION; |
| 407 | pmu_raw_writel(tmp, EXYNOS5420_FSYS2_OPTION); |
| 408 | |
| 409 | tmp = pmu_raw_readl(EXYNOS5420_PSGEN_OPTION); |
| 410 | tmp |= EXYNOS5420_EMULATION; |
| 411 | pmu_raw_writel(tmp, EXYNOS5420_PSGEN_OPTION); |
| 412 | } |
| 413 | |
| 414 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 415 | static int exynos_pm_suspend(void) |
| 416 | { |
| 417 | exynos_pm_central_suspend(); |
| 418 | |
Bartlomiej Zolnierkiewicz | 865e8b7 | 2015-01-24 14:05:50 +0900 | [diff] [blame] | 419 | /* Setting SEQ_OPTION register */ |
| 420 | pmu_raw_writel(S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0, |
| 421 | S5P_CENTRAL_SEQ_OPTION); |
| 422 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 423 | if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) |
| 424 | exynos_cpu_save_register(); |
| 425 | |
| 426 | return 0; |
| 427 | } |
| 428 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 429 | static int exynos5420_pm_suspend(void) |
| 430 | { |
| 431 | u32 this_cluster; |
| 432 | |
| 433 | exynos_pm_central_suspend(); |
| 434 | |
| 435 | /* Setting SEQ_OPTION register */ |
| 436 | |
| 437 | this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 1); |
| 438 | if (!this_cluster) |
| 439 | pmu_raw_writel(EXYNOS5420_ARM_USE_STANDBY_WFI0, |
| 440 | S5P_CENTRAL_SEQ_OPTION); |
| 441 | else |
| 442 | pmu_raw_writel(EXYNOS5420_KFC_USE_STANDBY_WFI0, |
| 443 | S5P_CENTRAL_SEQ_OPTION); |
| 444 | return 0; |
| 445 | } |
| 446 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 447 | static void exynos_pm_release_retention(void) |
| 448 | { |
| 449 | unsigned int i; |
| 450 | |
| 451 | for (i = 0; (pm_data->release_ret_regs[i] != REG_TABLE_END); i++) |
| 452 | pmu_raw_writel(EXYNOS_WAKEUP_FROM_LOWPWR, |
| 453 | pm_data->release_ret_regs[i]); |
| 454 | } |
| 455 | |
| 456 | static void exynos_pm_resume(void) |
| 457 | { |
| 458 | u32 cpuid = read_cpuid_part(); |
| 459 | |
| 460 | if (exynos_pm_central_resume()) |
| 461 | goto early_wakeup; |
| 462 | |
| 463 | /* For release retention */ |
| 464 | exynos_pm_release_retention(); |
| 465 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 466 | s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 467 | |
| 468 | if (cpuid == ARM_CPU_PART_CORTEX_A9) |
| 469 | scu_enable(S5P_VA_SCU); |
| 470 | |
| 471 | if (call_firmware_op(resume) == -ENOSYS |
| 472 | && cpuid == ARM_CPU_PART_CORTEX_A9) |
| 473 | exynos_cpu_restore_register(); |
| 474 | |
| 475 | early_wakeup: |
| 476 | |
| 477 | /* Clear SLEEP mode set in INFORM1 */ |
| 478 | pmu_raw_writel(0x0, S5P_INFORM1); |
Krzysztof Kozlowski | 6f02497 | 2015-03-11 11:13:57 +0100 | [diff] [blame] | 479 | exynos_set_delayed_reset_assertion(true); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 480 | } |
| 481 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 482 | static void exynos3250_pm_resume(void) |
| 483 | { |
| 484 | u32 cpuid = read_cpuid_part(); |
| 485 | |
| 486 | if (exynos_pm_central_resume()) |
| 487 | goto early_wakeup; |
| 488 | |
| 489 | /* For release retention */ |
| 490 | exynos_pm_release_retention(); |
| 491 | |
| 492 | pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); |
| 493 | |
| 494 | if (call_firmware_op(resume) == -ENOSYS |
| 495 | && cpuid == ARM_CPU_PART_CORTEX_A9) |
| 496 | exynos_cpu_restore_register(); |
| 497 | |
| 498 | early_wakeup: |
| 499 | |
| 500 | /* Clear SLEEP mode set in INFORM1 */ |
| 501 | pmu_raw_writel(0x0, S5P_INFORM1); |
| 502 | } |
| 503 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 504 | static void exynos5420_prepare_pm_resume(void) |
| 505 | { |
| 506 | if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM)) |
| 507 | WARN_ON(mcpm_cpu_powered_up()); |
| 508 | } |
| 509 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 510 | static void exynos5420_pm_resume(void) |
| 511 | { |
| 512 | unsigned long tmp; |
| 513 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 514 | /* Restore the CPU0 low power state register */ |
| 515 | tmp = pmu_raw_readl(EXYNOS5_ARM_CORE0_SYS_PWR_REG); |
| 516 | pmu_raw_writel(tmp | S5P_CORE_LOCAL_PWR_EN, |
| 517 | EXYNOS5_ARM_CORE0_SYS_PWR_REG); |
| 518 | |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 519 | /* Restore the sysram cpu state register */ |
| 520 | __raw_writel(exynos5420_cpu_state, |
| 521 | sysram_base_addr + EXYNOS5420_CPU_STATE); |
| 522 | |
| 523 | pmu_raw_writel(EXYNOS5420_USE_STANDBY_WFI_ALL, |
| 524 | S5P_CENTRAL_SEQ_OPTION); |
| 525 | |
| 526 | if (exynos_pm_central_resume()) |
| 527 | goto early_wakeup; |
| 528 | |
| 529 | /* For release retention */ |
| 530 | exynos_pm_release_retention(); |
| 531 | |
| 532 | pmu_raw_writel(exynos_pmu_spare3, S5P_PMU_SPARE3); |
| 533 | |
| 534 | s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save)); |
| 535 | |
| 536 | early_wakeup: |
| 537 | |
| 538 | tmp = pmu_raw_readl(EXYNOS5420_SFR_AXI_CGDIS1); |
| 539 | tmp &= ~EXYNOS5420_UFS; |
| 540 | pmu_raw_writel(tmp, EXYNOS5420_SFR_AXI_CGDIS1); |
| 541 | |
| 542 | tmp = pmu_raw_readl(EXYNOS5420_FSYS2_OPTION); |
| 543 | tmp &= ~EXYNOS5420_EMULATION; |
| 544 | pmu_raw_writel(tmp, EXYNOS5420_FSYS2_OPTION); |
| 545 | |
| 546 | tmp = pmu_raw_readl(EXYNOS5420_PSGEN_OPTION); |
| 547 | tmp &= ~EXYNOS5420_EMULATION; |
| 548 | pmu_raw_writel(tmp, EXYNOS5420_PSGEN_OPTION); |
| 549 | |
| 550 | /* Clear SLEEP mode set in INFORM1 */ |
| 551 | pmu_raw_writel(0x0, S5P_INFORM1); |
| 552 | } |
| 553 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 554 | /* |
| 555 | * Suspend Ops |
| 556 | */ |
| 557 | |
| 558 | static int exynos_suspend_enter(suspend_state_t state) |
| 559 | { |
| 560 | int ret; |
| 561 | |
| 562 | s3c_pm_debug_init(); |
| 563 | |
| 564 | S3C_PMDBG("%s: suspending the system...\n", __func__); |
| 565 | |
| 566 | S3C_PMDBG("%s: wakeup masks: %08x,%08x\n", __func__, |
| 567 | exynos_irqwake_intmask, exynos_get_eint_wake_mask()); |
| 568 | |
| 569 | if (exynos_irqwake_intmask == -1U |
| 570 | && exynos_get_eint_wake_mask() == -1U) { |
| 571 | pr_err("%s: No wake-up sources!\n", __func__); |
| 572 | pr_err("%s: Aborting sleep\n", __func__); |
| 573 | return -EINVAL; |
| 574 | } |
| 575 | |
| 576 | s3c_pm_save_uarts(); |
| 577 | if (pm_data->pm_prepare) |
| 578 | pm_data->pm_prepare(); |
| 579 | flush_cache_all(); |
| 580 | s3c_pm_check_store(); |
| 581 | |
| 582 | ret = call_firmware_op(suspend); |
| 583 | if (ret == -ENOSYS) |
| 584 | ret = cpu_suspend(0, pm_data->cpu_suspend); |
| 585 | if (ret) |
| 586 | return ret; |
| 587 | |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 588 | if (pm_data->pm_resume_prepare) |
| 589 | pm_data->pm_resume_prepare(); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 590 | s3c_pm_restore_uarts(); |
| 591 | |
| 592 | S3C_PMDBG("%s: wakeup stat: %08x\n", __func__, |
| 593 | pmu_raw_readl(S5P_WAKEUP_STAT)); |
| 594 | |
| 595 | s3c_pm_check_restore(); |
| 596 | |
| 597 | S3C_PMDBG("%s: resuming the system...\n", __func__); |
| 598 | |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | static int exynos_suspend_prepare(void) |
| 603 | { |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 604 | int ret; |
| 605 | |
| 606 | /* |
| 607 | * REVISIT: It would be better if struct platform_suspend_ops |
| 608 | * .prepare handler get the suspend_state_t as a parameter to |
| 609 | * avoid hard-coding the suspend to mem state. It's safe to do |
| 610 | * it now only because the suspend_valid_only_mem function is |
| 611 | * used as the .valid callback used to check if a given state |
| 612 | * is supported by the platform anyways. |
| 613 | */ |
| 614 | ret = regulator_suspend_prepare(PM_SUSPEND_MEM); |
| 615 | if (ret) { |
| 616 | pr_err("Failed to prepare regulators for suspend (%d)\n", ret); |
| 617 | return ret; |
| 618 | } |
| 619 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 620 | s3c_pm_check_prepare(); |
| 621 | |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | static void exynos_suspend_finish(void) |
| 626 | { |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 627 | int ret; |
| 628 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 629 | s3c_pm_check_cleanup(); |
Javier Martinez Canillas | c645a59 | 2014-11-13 11:14:40 +0900 | [diff] [blame] | 630 | |
| 631 | ret = regulator_suspend_finish(); |
| 632 | if (ret) |
| 633 | pr_warn("Failed to resume regulators from suspend (%d)\n", ret); |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | static const struct platform_suspend_ops exynos_suspend_ops = { |
| 637 | .enter = exynos_suspend_enter, |
| 638 | .prepare = exynos_suspend_prepare, |
| 639 | .finish = exynos_suspend_finish, |
| 640 | .valid = suspend_valid_only_mem, |
| 641 | }; |
| 642 | |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 643 | static const struct exynos_pm_data exynos3250_pm_data = { |
| 644 | .wkup_irq = exynos3250_wkup_irq, |
| 645 | .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), |
| 646 | .release_ret_regs = exynos3250_release_ret_regs, |
| 647 | .pm_suspend = exynos_pm_suspend, |
| 648 | .pm_resume = exynos3250_pm_resume, |
| 649 | .pm_prepare = exynos3250_pm_prepare, |
| 650 | .cpu_suspend = exynos3250_cpu_suspend, |
| 651 | }; |
| 652 | |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 653 | static const struct exynos_pm_data exynos4_pm_data = { |
| 654 | .wkup_irq = exynos4_wkup_irq, |
| 655 | .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), |
| 656 | .release_ret_regs = exynos_release_ret_regs, |
| 657 | .pm_suspend = exynos_pm_suspend, |
| 658 | .pm_resume = exynos_pm_resume, |
| 659 | .pm_prepare = exynos_pm_prepare, |
| 660 | .cpu_suspend = exynos_cpu_suspend, |
| 661 | }; |
| 662 | |
| 663 | static const struct exynos_pm_data exynos5250_pm_data = { |
| 664 | .wkup_irq = exynos5250_wkup_irq, |
| 665 | .wake_disable_mask = ((0xFF << 8) | (0x1F << 1)), |
| 666 | .release_ret_regs = exynos_release_ret_regs, |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 667 | .pm_suspend = exynos_pm_suspend, |
| 668 | .pm_resume = exynos_pm_resume, |
| 669 | .pm_prepare = exynos_pm_prepare, |
| 670 | .cpu_suspend = exynos_cpu_suspend, |
| 671 | }; |
| 672 | |
Krzysztof Kozlowski | 7383833 | 2015-03-18 02:34:37 +0900 | [diff] [blame] | 673 | static const struct exynos_pm_data exynos5420_pm_data = { |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 674 | .wkup_irq = exynos5250_wkup_irq, |
| 675 | .wake_disable_mask = (0x7F << 7) | (0x1F << 1), |
| 676 | .release_ret_regs = exynos5420_release_ret_regs, |
Abhilash Kesavan | adc548d | 2014-11-07 09:20:16 +0900 | [diff] [blame] | 677 | .pm_resume_prepare = exynos5420_prepare_pm_resume, |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 678 | .pm_resume = exynos5420_pm_resume, |
| 679 | .pm_suspend = exynos5420_pm_suspend, |
| 680 | .pm_prepare = exynos5420_pm_prepare, |
| 681 | .cpu_suspend = exynos5420_cpu_suspend, |
| 682 | }; |
| 683 | |
Uwe Kleine-König | 444d2d3 | 2015-02-18 21:19:56 +0100 | [diff] [blame] | 684 | static const struct of_device_id exynos_pmu_of_device_ids[] __initconst = { |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 685 | { |
Chanwoo Choi | a4f582f | 2015-01-12 17:41:34 +0900 | [diff] [blame] | 686 | .compatible = "samsung,exynos3250-pmu", |
| 687 | .data = &exynos3250_pm_data, |
| 688 | }, { |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 689 | .compatible = "samsung,exynos4210-pmu", |
| 690 | .data = &exynos4_pm_data, |
| 691 | }, { |
| 692 | .compatible = "samsung,exynos4212-pmu", |
| 693 | .data = &exynos4_pm_data, |
| 694 | }, { |
| 695 | .compatible = "samsung,exynos4412-pmu", |
| 696 | .data = &exynos4_pm_data, |
| 697 | }, { |
| 698 | .compatible = "samsung,exynos5250-pmu", |
| 699 | .data = &exynos5250_pm_data, |
Vikas Sajjan | 0fdf088 | 2014-11-07 09:17:36 +0900 | [diff] [blame] | 700 | }, { |
| 701 | .compatible = "samsung,exynos5420-pmu", |
| 702 | .data = &exynos5420_pm_data, |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 703 | }, |
| 704 | { /*sentinel*/ }, |
| 705 | }; |
| 706 | |
| 707 | static struct syscore_ops exynos_pm_syscore_ops; |
| 708 | |
| 709 | void __init exynos_pm_init(void) |
| 710 | { |
| 711 | const struct of_device_id *match; |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 712 | struct device_node *np; |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 713 | u32 tmp; |
| 714 | |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 715 | np = of_find_matching_node_and_match(NULL, exynos_pmu_of_device_ids, &match); |
| 716 | if (!np) { |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 717 | pr_err("Failed to find PMU node\n"); |
| 718 | return; |
| 719 | } |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 720 | |
Julien Grall | e5cbec6 | 2015-05-13 03:49:04 +0900 | [diff] [blame] | 721 | if (WARN_ON(!of_find_property(np, "interrupt-controller", NULL))) { |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 722 | pr_warn("Outdated DT detected, suspend/resume will NOT work\n"); |
Julien Grall | e5cbec6 | 2015-05-13 03:49:04 +0900 | [diff] [blame] | 723 | return; |
| 724 | } |
Marc Zyngier | 8b283c0 | 2015-03-11 15:44:52 +0000 | [diff] [blame] | 725 | |
Linus Torvalds | e6c81cc | 2015-04-22 09:08:39 -0700 | [diff] [blame] | 726 | pm_data = (const struct exynos_pm_data *) match->data; |
Bartlomiej Zolnierkiewicz | 0d713cf | 2014-09-25 18:02:45 +0900 | [diff] [blame] | 727 | |
| 728 | /* All wakeup disable */ |
| 729 | tmp = pmu_raw_readl(S5P_WAKEUP_MASK); |
| 730 | tmp |= pm_data->wake_disable_mask; |
| 731 | pmu_raw_writel(tmp, S5P_WAKEUP_MASK); |
| 732 | |
| 733 | exynos_pm_syscore_ops.suspend = pm_data->pm_suspend; |
| 734 | exynos_pm_syscore_ops.resume = pm_data->pm_resume; |
| 735 | |
| 736 | register_syscore_ops(&exynos_pm_syscore_ops); |
| 737 | suspend_set_ops(&exynos_suspend_ops); |
| 738 | } |