1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2011-2014 Freescale Semiconductor, Inc. 4 * Copyright 2011 Linaro Ltd. 5 */ 6 7 #include <linux/clk/imx.h> 8 #include <linux/delay.h> 9 #include <linux/init.h> 10 #include <linux/io.h> 11 #include <linux/irq.h> 12 #include <linux/genalloc.h> 13 #include <linux/irqchip/arm-gic.h> 14 #include <linux/mfd/syscon.h> 15 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> 16 #include <linux/of.h> 17 #include <linux/of_address.h> 18 #include <linux/of_platform.h> 19 #include <linux/platform_device.h> 20 #include <linux/regmap.h> 21 #include <linux/suspend.h> 22 #include <asm/cacheflush.h> 23 #include <asm/fncpy.h> 24 #include <asm/proc-fns.h> 25 #include <asm/suspend.h> 26 #include <asm/tlb.h> 27 28 #include "common.h" 29 #include "hardware.h" 30 31 #define CCR 0x0 32 #define BM_CCR_WB_COUNT (0x7 << 16) 33 #define BM_CCR_RBC_BYPASS_COUNT (0x3f << 21) 34 #define BM_CCR_RBC_EN (0x1 << 27) 35 36 #define CLPCR 0x54 37 #define BP_CLPCR_LPM 0 38 #define BM_CLPCR_LPM (0x3 << 0) 39 #define BM_CLPCR_BYPASS_PMIC_READY (0x1 << 2) 40 #define BM_CLPCR_ARM_CLK_DIS_ON_LPM (0x1 << 5) 41 #define BM_CLPCR_SBYOS (0x1 << 6) 42 #define BM_CLPCR_DIS_REF_OSC (0x1 << 7) 43 #define BM_CLPCR_VSTBY (0x1 << 8) 44 #define BP_CLPCR_STBY_COUNT 9 45 #define BM_CLPCR_STBY_COUNT (0x3 << 9) 46 #define BM_CLPCR_COSC_PWRDOWN (0x1 << 11) 47 #define BM_CLPCR_WB_PER_AT_LPM (0x1 << 16) 48 #define BM_CLPCR_WB_CORE_AT_LPM (0x1 << 17) 49 #define BM_CLPCR_BYP_MMDC_CH0_LPM_HS (0x1 << 19) 50 #define BM_CLPCR_BYP_MMDC_CH1_LPM_HS (0x1 << 21) 51 #define BM_CLPCR_MASK_CORE0_WFI (0x1 << 22) 52 #define BM_CLPCR_MASK_CORE1_WFI (0x1 << 23) 53 #define BM_CLPCR_MASK_CORE2_WFI (0x1 << 24) 54 #define BM_CLPCR_MASK_CORE3_WFI (0x1 << 25) 55 #define BM_CLPCR_MASK_SCU_IDLE (0x1 << 26) 56 #define BM_CLPCR_MASK_L2CC_IDLE (0x1 << 27) 57 58 #define CGPR 0x64 59 #define BM_CGPR_INT_MEM_CLK_LPM (0x1 << 17) 60 61 #define MX6Q_SUSPEND_OCRAM_SIZE 0x1000 62 #define MX6_MAX_MMDC_IO_NUM 33 63 64 static void __iomem *ccm_base; 65 static void __iomem *suspend_ocram_base; 66 static void (*imx6_suspend_in_ocram_fn)(void __iomem *ocram_vbase); 67 68 /* 69 * suspend ocram space layout: 70 * ======================== high address ====================== 71 * . 72 * . 73 * . 74 * ^ 75 * ^ 76 * ^ 77 * imx6_suspend code 78 * PM_INFO structure(imx6_cpu_pm_info) 79 * ======================== low address ======================= 80 */ 81 82 struct imx6_pm_base { 83 phys_addr_t pbase; 84 void __iomem *vbase; 85 }; 86 87 struct imx6_pm_socdata { 88 u32 ddr_type; 89 const char *mmdc_compat; 90 const char *src_compat; 91 const char *iomuxc_compat; 92 const char *gpc_compat; 93 const char *pl310_compat; 94 const u32 mmdc_io_num; 95 const u32 *mmdc_io_offset; 96 }; 97 98 static const u32 imx6q_mmdc_io_offset[] __initconst = { 99 0x5ac, 0x5b4, 0x528, 0x520, /* DQM0 ~ DQM3 */ 100 0x514, 0x510, 0x5bc, 0x5c4, /* DQM4 ~ DQM7 */ 101 0x56c, 0x578, 0x588, 0x594, /* CAS, RAS, SDCLK_0, SDCLK_1 */ 102 0x5a8, 0x5b0, 0x524, 0x51c, /* SDQS0 ~ SDQS3 */ 103 0x518, 0x50c, 0x5b8, 0x5c0, /* SDQS4 ~ SDQS7 */ 104 0x784, 0x788, 0x794, 0x79c, /* GPR_B0DS ~ GPR_B3DS */ 105 0x7a0, 0x7a4, 0x7a8, 0x748, /* GPR_B4DS ~ GPR_B7DS */ 106 0x59c, 0x5a0, 0x750, 0x774, /* SODT0, SODT1, MODE_CTL, MODE */ 107 0x74c, /* GPR_ADDS */ 108 }; 109 110 static const u32 imx6dl_mmdc_io_offset[] __initconst = { 111 0x470, 0x474, 0x478, 0x47c, /* DQM0 ~ DQM3 */ 112 0x480, 0x484, 0x488, 0x48c, /* DQM4 ~ DQM7 */ 113 0x464, 0x490, 0x4ac, 0x4b0, /* CAS, RAS, SDCLK_0, SDCLK_1 */ 114 0x4bc, 0x4c0, 0x4c4, 0x4c8, /* DRAM_SDQS0 ~ DRAM_SDQS3 */ 115 0x4cc, 0x4d0, 0x4d4, 0x4d8, /* DRAM_SDQS4 ~ DRAM_SDQS7 */ 116 0x764, 0x770, 0x778, 0x77c, /* GPR_B0DS ~ GPR_B3DS */ 117 0x780, 0x784, 0x78c, 0x748, /* GPR_B4DS ~ GPR_B7DS */ 118 0x4b4, 0x4b8, 0x750, 0x760, /* SODT0, SODT1, MODE_CTL, MODE */ 119 0x74c, /* GPR_ADDS */ 120 }; 121 122 static const u32 imx6sl_mmdc_io_offset[] __initconst = { 123 0x30c, 0x310, 0x314, 0x318, /* DQM0 ~ DQM3 */ 124 0x5c4, 0x5cc, 0x5d4, 0x5d8, /* GPR_B0DS ~ GPR_B3DS */ 125 0x300, 0x31c, 0x338, 0x5ac, /* CAS, RAS, SDCLK_0, GPR_ADDS */ 126 0x33c, 0x340, 0x5b0, 0x5c0, /* SODT0, SODT1, MODE_CTL, MODE */ 127 0x330, 0x334, 0x320, /* SDCKE0, SDCKE1, RESET */ 128 }; 129 130 static const u32 imx6sll_mmdc_io_offset[] __initconst = { 131 0x294, 0x298, 0x29c, 0x2a0, /* DQM0 ~ DQM3 */ 132 0x544, 0x54c, 0x554, 0x558, /* GPR_B0DS ~ GPR_B3DS */ 133 0x530, 0x540, 0x2ac, 0x52c, /* MODE_CTL, MODE, SDCLK_0, GPR_ADDDS */ 134 0x2a4, 0x2a8, /* SDCKE0, SDCKE1*/ 135 }; 136 137 static const u32 imx6sx_mmdc_io_offset[] __initconst = { 138 0x2ec, 0x2f0, 0x2f4, 0x2f8, /* DQM0 ~ DQM3 */ 139 0x60c, 0x610, 0x61c, 0x620, /* GPR_B0DS ~ GPR_B3DS */ 140 0x300, 0x2fc, 0x32c, 0x5f4, /* CAS, RAS, SDCLK_0, GPR_ADDS */ 141 0x310, 0x314, 0x5f8, 0x608, /* SODT0, SODT1, MODE_CTL, MODE */ 142 0x330, 0x334, 0x338, 0x33c, /* SDQS0 ~ SDQS3 */ 143 }; 144 145 static const u32 imx6ul_mmdc_io_offset[] __initconst = { 146 0x244, 0x248, 0x24c, 0x250, /* DQM0, DQM1, RAS, CAS */ 147 0x27c, 0x498, 0x4a4, 0x490, /* SDCLK0, GPR_B0DS-B1DS, GPR_ADDS */ 148 0x280, 0x284, 0x260, 0x264, /* SDQS0~1, SODT0, SODT1 */ 149 0x494, 0x4b0, /* MODE_CTL, MODE, */ 150 }; 151 152 static const struct imx6_pm_socdata imx6q_pm_data __initconst = { 153 .mmdc_compat = "fsl,imx6q-mmdc", 154 .src_compat = "fsl,imx6q-src", 155 .iomuxc_compat = "fsl,imx6q-iomuxc", 156 .gpc_compat = "fsl,imx6q-gpc", 157 .pl310_compat = "arm,pl310-cache", 158 .mmdc_io_num = ARRAY_SIZE(imx6q_mmdc_io_offset), 159 .mmdc_io_offset = imx6q_mmdc_io_offset, 160 }; 161 162 static const struct imx6_pm_socdata imx6dl_pm_data __initconst = { 163 .mmdc_compat = "fsl,imx6q-mmdc", 164 .src_compat = "fsl,imx6q-src", 165 .iomuxc_compat = "fsl,imx6dl-iomuxc", 166 .gpc_compat = "fsl,imx6q-gpc", 167 .pl310_compat = "arm,pl310-cache", 168 .mmdc_io_num = ARRAY_SIZE(imx6dl_mmdc_io_offset), 169 .mmdc_io_offset = imx6dl_mmdc_io_offset, 170 }; 171 172 static const struct imx6_pm_socdata imx6sl_pm_data __initconst = { 173 .mmdc_compat = "fsl,imx6sl-mmdc", 174 .src_compat = "fsl,imx6sl-src", 175 .iomuxc_compat = "fsl,imx6sl-iomuxc", 176 .gpc_compat = "fsl,imx6sl-gpc", 177 .pl310_compat = "arm,pl310-cache", 178 .mmdc_io_num = ARRAY_SIZE(imx6sl_mmdc_io_offset), 179 .mmdc_io_offset = imx6sl_mmdc_io_offset, 180 }; 181 182 static const struct imx6_pm_socdata imx6sll_pm_data __initconst = { 183 .mmdc_compat = "fsl,imx6sll-mmdc", 184 .src_compat = "fsl,imx6sll-src", 185 .iomuxc_compat = "fsl,imx6sll-iomuxc", 186 .gpc_compat = "fsl,imx6sll-gpc", 187 .pl310_compat = "arm,pl310-cache", 188 .mmdc_io_num = ARRAY_SIZE(imx6sll_mmdc_io_offset), 189 .mmdc_io_offset = imx6sll_mmdc_io_offset, 190 }; 191 192 static const struct imx6_pm_socdata imx6sx_pm_data __initconst = { 193 .mmdc_compat = "fsl,imx6sx-mmdc", 194 .src_compat = "fsl,imx6sx-src", 195 .iomuxc_compat = "fsl,imx6sx-iomuxc", 196 .gpc_compat = "fsl,imx6sx-gpc", 197 .pl310_compat = "arm,pl310-cache", 198 .mmdc_io_num = ARRAY_SIZE(imx6sx_mmdc_io_offset), 199 .mmdc_io_offset = imx6sx_mmdc_io_offset, 200 }; 201 202 static const struct imx6_pm_socdata imx6ul_pm_data __initconst = { 203 .mmdc_compat = "fsl,imx6ul-mmdc", 204 .src_compat = "fsl,imx6ul-src", 205 .iomuxc_compat = "fsl,imx6ul-iomuxc", 206 .gpc_compat = "fsl,imx6ul-gpc", 207 .pl310_compat = NULL, 208 .mmdc_io_num = ARRAY_SIZE(imx6ul_mmdc_io_offset), 209 .mmdc_io_offset = imx6ul_mmdc_io_offset, 210 }; 211 212 /* 213 * This structure is for passing necessary data for low level ocram 214 * suspend code(arch/arm/mach-imx/suspend-imx6.S), if this struct 215 * definition is changed, the offset definition in 216 * arch/arm/mach-imx/suspend-imx6.S must be also changed accordingly, 217 * otherwise, the suspend to ocram function will be broken! 218 */ 219 struct imx6_cpu_pm_info { 220 phys_addr_t pbase; /* The physical address of pm_info. */ 221 phys_addr_t resume_addr; /* The physical resume address for asm code */ 222 u32 ddr_type; 223 u32 pm_info_size; /* Size of pm_info. */ 224 struct imx6_pm_base mmdc_base; 225 struct imx6_pm_base src_base; 226 struct imx6_pm_base iomuxc_base; 227 struct imx6_pm_base ccm_base; 228 struct imx6_pm_base gpc_base; 229 struct imx6_pm_base l2_base; 230 u32 mmdc_io_num; /* Number of MMDC IOs which need saved/restored. */ 231 u32 mmdc_io_val[MX6_MAX_MMDC_IO_NUM][2]; /* To save offset and value */ 232 } __aligned(8); 233 234 void imx6_set_int_mem_clk_lpm(bool enable) 235 { 236 u32 val = readl_relaxed(ccm_base + CGPR); 237 238 val &= ~BM_CGPR_INT_MEM_CLK_LPM; 239 if (enable) 240 val |= BM_CGPR_INT_MEM_CLK_LPM; 241 writel_relaxed(val, ccm_base + CGPR); 242 } 243 244 void imx6_enable_rbc(bool enable) 245 { 246 u32 val; 247 248 /* 249 * need to mask all interrupts in GPC before 250 * operating RBC configurations 251 */ 252 imx_gpc_mask_all(); 253 254 /* configure RBC enable bit */ 255 val = readl_relaxed(ccm_base + CCR); 256 val &= ~BM_CCR_RBC_EN; 257 val |= enable ? BM_CCR_RBC_EN : 0; 258 writel_relaxed(val, ccm_base + CCR); 259 260 /* configure RBC count */ 261 val = readl_relaxed(ccm_base + CCR); 262 val &= ~BM_CCR_RBC_BYPASS_COUNT; 263 val |= enable ? BM_CCR_RBC_BYPASS_COUNT : 0; 264 writel(val, ccm_base + CCR); 265 266 /* 267 * need to delay at least 2 cycles of CKIL(32K) 268 * due to hardware design requirement, which is 269 * ~61us, here we use 65us for safe 270 */ 271 udelay(65); 272 273 /* restore GPC interrupt mask settings */ 274 imx_gpc_restore_all(); 275 } 276 277 static void imx6q_enable_wb(bool enable) 278 { 279 u32 val; 280 281 /* configure well bias enable bit */ 282 val = readl_relaxed(ccm_base + CLPCR); 283 val &= ~BM_CLPCR_WB_PER_AT_LPM; 284 val |= enable ? BM_CLPCR_WB_PER_AT_LPM : 0; 285 writel_relaxed(val, ccm_base + CLPCR); 286 287 /* configure well bias count */ 288 val = readl_relaxed(ccm_base + CCR); 289 val &= ~BM_CCR_WB_COUNT; 290 val |= enable ? BM_CCR_WB_COUNT : 0; 291 writel_relaxed(val, ccm_base + CCR); 292 } 293 294 int imx6_set_lpm(enum mxc_cpu_pwr_mode mode) 295 { 296 u32 val = readl_relaxed(ccm_base + CLPCR); 297 298 val &= ~BM_CLPCR_LPM; 299 switch (mode) { 300 case WAIT_CLOCKED: 301 break; 302 case WAIT_UNCLOCKED: 303 val |= 0x1 << BP_CLPCR_LPM; 304 val |= BM_CLPCR_ARM_CLK_DIS_ON_LPM; 305 break; 306 case STOP_POWER_ON: 307 val |= 0x2 << BP_CLPCR_LPM; 308 val &= ~BM_CLPCR_VSTBY; 309 val &= ~BM_CLPCR_SBYOS; 310 if (cpu_is_imx6sl()) 311 val |= BM_CLPCR_BYPASS_PMIC_READY; 312 if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul() || 313 cpu_is_imx6ull() || cpu_is_imx6sll() || cpu_is_imx6ulz()) 314 val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS; 315 else 316 val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS; 317 break; 318 case WAIT_UNCLOCKED_POWER_OFF: 319 val |= 0x1 << BP_CLPCR_LPM; 320 val &= ~BM_CLPCR_VSTBY; 321 val &= ~BM_CLPCR_SBYOS; 322 break; 323 case STOP_POWER_OFF: 324 val |= 0x2 << BP_CLPCR_LPM; 325 val |= 0x3 << BP_CLPCR_STBY_COUNT; 326 val |= BM_CLPCR_VSTBY; 327 val |= BM_CLPCR_SBYOS; 328 if (cpu_is_imx6sl() || cpu_is_imx6sx()) 329 val |= BM_CLPCR_BYPASS_PMIC_READY; 330 if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul() || 331 cpu_is_imx6ull() || cpu_is_imx6sll() || cpu_is_imx6ulz()) 332 val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS; 333 else 334 val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS; 335 break; 336 default: 337 return -EINVAL; 338 } 339 340 /* 341 * ERR007265: CCM: When improper low-power sequence is used, 342 * the SoC enters low power mode before the ARM core executes WFI. 343 * 344 * Software workaround: 345 * 1) Software should trigger IRQ #32 (IOMUX) to be always pending 346 * by setting IOMUX_GPR1_GINT. 347 * 2) Software should then unmask IRQ #32 in GPC before setting CCM 348 * Low-Power mode. 349 * 3) Software should mask IRQ #32 right after CCM Low-Power mode 350 * is set (set bits 0-1 of CCM_CLPCR). 351 * 352 * Note that IRQ #32 is GIC SPI #0. 353 */ 354 if (mode != WAIT_CLOCKED) 355 imx_gpc_hwirq_unmask(0); 356 writel_relaxed(val, ccm_base + CLPCR); 357 if (mode != WAIT_CLOCKED) 358 imx_gpc_hwirq_mask(0); 359 360 return 0; 361 } 362 363 static int imx6q_suspend_finish(unsigned long val) 364 { 365 if (!imx6_suspend_in_ocram_fn) { 366 cpu_do_idle(); 367 } else { 368 /* 369 * call low level suspend function in ocram, 370 * as we need to float DDR IO. 371 */ 372 local_flush_tlb_all(); 373 /* check if need to flush internal L2 cache */ 374 if (!((struct imx6_cpu_pm_info *) 375 suspend_ocram_base)->l2_base.vbase) 376 flush_cache_all(); 377 imx6_suspend_in_ocram_fn(suspend_ocram_base); 378 } 379 380 return 0; 381 } 382 383 static int imx6q_pm_enter(suspend_state_t state) 384 { 385 switch (state) { 386 case PM_SUSPEND_STANDBY: 387 imx6_set_lpm(STOP_POWER_ON); 388 imx6_set_int_mem_clk_lpm(true); 389 imx_gpc_pre_suspend(false); 390 if (cpu_is_imx6sl()) 391 imx6sl_set_wait_clk(true); 392 /* Zzz ... */ 393 cpu_do_idle(); 394 if (cpu_is_imx6sl()) 395 imx6sl_set_wait_clk(false); 396 imx_gpc_post_resume(); 397 imx6_set_lpm(WAIT_CLOCKED); 398 break; 399 case PM_SUSPEND_MEM: 400 imx6_set_lpm(STOP_POWER_OFF); 401 imx6_set_int_mem_clk_lpm(false); 402 imx6q_enable_wb(true); 403 /* 404 * For suspend into ocram, asm code already take care of 405 * RBC setting, so we do NOT need to do that here. 406 */ 407 if (!imx6_suspend_in_ocram_fn) 408 imx6_enable_rbc(true); 409 imx_gpc_pre_suspend(true); 410 imx_anatop_pre_suspend(); 411 /* Zzz ... */ 412 cpu_suspend(0, imx6q_suspend_finish); 413 if (cpu_is_imx6q() || cpu_is_imx6dl()) 414 imx_smp_prepare(); 415 imx_anatop_post_resume(); 416 imx_gpc_post_resume(); 417 imx6_enable_rbc(false); 418 imx6q_enable_wb(false); 419 imx6_set_int_mem_clk_lpm(true); 420 imx6_set_lpm(WAIT_CLOCKED); 421 break; 422 default: 423 return -EINVAL; 424 } 425 426 return 0; 427 } 428 429 static int imx6q_pm_valid(suspend_state_t state) 430 { 431 return (state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM); 432 } 433 434 static const struct platform_suspend_ops imx6q_pm_ops = { 435 .enter = imx6q_pm_enter, 436 .valid = imx6q_pm_valid, 437 }; 438 439 static int __init imx6_pm_get_base(struct imx6_pm_base *base, 440 const char *compat) 441 { 442 struct device_node *node; 443 struct resource res; 444 int ret = 0; 445 446 node = of_find_compatible_node(NULL, NULL, compat); 447 if (!node) 448 return -ENODEV; 449 450 ret = of_address_to_resource(node, 0, &res); 451 if (ret) 452 goto put_node; 453 454 base->pbase = res.start; 455 base->vbase = ioremap(res.start, resource_size(&res)); 456 if (!base->vbase) 457 ret = -ENOMEM; 458 459 put_node: 460 of_node_put(node); 461 return ret; 462 } 463 464 static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata) 465 { 466 phys_addr_t ocram_pbase; 467 struct device_node *node; 468 struct platform_device *pdev; 469 struct imx6_cpu_pm_info *pm_info; 470 struct gen_pool *ocram_pool; 471 unsigned long ocram_base; 472 int i, ret = 0; 473 const u32 *mmdc_offset_array; 474 475 suspend_set_ops(&imx6q_pm_ops); 476 477 if (!socdata) { 478 pr_warn("%s: invalid argument!\n", __func__); 479 return -EINVAL; 480 } 481 482 node = of_find_compatible_node(NULL, NULL, "mmio-sram"); 483 if (!node) { 484 pr_warn("%s: failed to find ocram node!\n", __func__); 485 return -ENODEV; 486 } 487 488 pdev = of_find_device_by_node(node); 489 if (!pdev) { 490 pr_warn("%s: failed to find ocram device!\n", __func__); 491 ret = -ENODEV; 492 goto put_node; 493 } 494 495 ocram_pool = gen_pool_get(&pdev->dev, NULL); 496 if (!ocram_pool) { 497 pr_warn("%s: ocram pool unavailable!\n", __func__); 498 ret = -ENODEV; 499 goto put_device; 500 } 501 502 ocram_base = gen_pool_alloc(ocram_pool, MX6Q_SUSPEND_OCRAM_SIZE); 503 if (!ocram_base) { 504 pr_warn("%s: unable to alloc ocram!\n", __func__); 505 ret = -ENOMEM; 506 goto put_device; 507 } 508 509 ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base); 510 511 suspend_ocram_base = __arm_ioremap_exec(ocram_pbase, 512 MX6Q_SUSPEND_OCRAM_SIZE, false); 513 514 memset(suspend_ocram_base, 0, sizeof(*pm_info)); 515 pm_info = suspend_ocram_base; 516 pm_info->pbase = ocram_pbase; 517 pm_info->resume_addr = __pa_symbol(v7_cpu_resume); 518 pm_info->pm_info_size = sizeof(*pm_info); 519 520 /* 521 * ccm physical address is not used by asm code currently, 522 * so get ccm virtual address directly. 523 */ 524 pm_info->ccm_base.vbase = ccm_base; 525 526 ret = imx6_pm_get_base(&pm_info->mmdc_base, socdata->mmdc_compat); 527 if (ret) { 528 pr_warn("%s: failed to get mmdc base %d!\n", __func__, ret); 529 goto put_device; 530 } 531 532 ret = imx6_pm_get_base(&pm_info->src_base, socdata->src_compat); 533 if (ret) { 534 pr_warn("%s: failed to get src base %d!\n", __func__, ret); 535 goto src_map_failed; 536 } 537 538 ret = imx6_pm_get_base(&pm_info->iomuxc_base, socdata->iomuxc_compat); 539 if (ret) { 540 pr_warn("%s: failed to get iomuxc base %d!\n", __func__, ret); 541 goto iomuxc_map_failed; 542 } 543 544 ret = imx6_pm_get_base(&pm_info->gpc_base, socdata->gpc_compat); 545 if (ret) { 546 pr_warn("%s: failed to get gpc base %d!\n", __func__, ret); 547 goto gpc_map_failed; 548 } 549 550 if (socdata->pl310_compat) { 551 ret = imx6_pm_get_base(&pm_info->l2_base, socdata->pl310_compat); 552 if (ret) { 553 pr_warn("%s: failed to get pl310-cache base %d!\n", 554 __func__, ret); 555 goto pl310_cache_map_failed; 556 } 557 } 558 559 pm_info->ddr_type = imx_mmdc_get_ddr_type(); 560 pm_info->mmdc_io_num = socdata->mmdc_io_num; 561 mmdc_offset_array = socdata->mmdc_io_offset; 562 563 for (i = 0; i < pm_info->mmdc_io_num; i++) { 564 pm_info->mmdc_io_val[i][0] = 565 mmdc_offset_array[i]; 566 pm_info->mmdc_io_val[i][1] = 567 readl_relaxed(pm_info->iomuxc_base.vbase + 568 mmdc_offset_array[i]); 569 } 570 571 imx6_suspend_in_ocram_fn = fncpy( 572 suspend_ocram_base + sizeof(*pm_info), 573 &imx6_suspend, 574 MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info)); 575 576 __arm_iomem_set_ro(suspend_ocram_base, MX6Q_SUSPEND_OCRAM_SIZE); 577 578 goto put_device; 579 580 pl310_cache_map_failed: 581 iounmap(pm_info->gpc_base.vbase); 582 gpc_map_failed: 583 iounmap(pm_info->iomuxc_base.vbase); 584 iomuxc_map_failed: 585 iounmap(pm_info->src_base.vbase); 586 src_map_failed: 587 iounmap(pm_info->mmdc_base.vbase); 588 put_device: 589 put_device(&pdev->dev); 590 put_node: 591 of_node_put(node); 592 593 return ret; 594 } 595 596 static void __init imx6_pm_common_init(const struct imx6_pm_socdata 597 *socdata) 598 { 599 struct regmap *gpr; 600 int ret; 601 602 WARN_ON(!ccm_base); 603 604 if (IS_ENABLED(CONFIG_SUSPEND)) { 605 ret = imx6q_suspend_init(socdata); 606 if (ret) 607 pr_warn("%s: No DDR LPM support with suspend %d!\n", 608 __func__, ret); 609 } 610 611 /* 612 * This is for SW workaround step #1 of ERR007265, see comments 613 * in imx6_set_lpm for details of this errata. 614 * Force IOMUXC irq pending, so that the interrupt to GPC can be 615 * used to deassert dsm_request signal when the signal gets 616 * asserted unexpectedly. 617 */ 618 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); 619 if (!IS_ERR(gpr)) 620 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT, 621 IMX6Q_GPR1_GINT); 622 } 623 624 static void imx6_pm_stby_poweroff(void) 625 { 626 gic_cpu_if_down(0); 627 imx6_set_lpm(STOP_POWER_OFF); 628 imx6q_suspend_finish(0); 629 630 mdelay(1000); 631 632 pr_emerg("Unable to poweroff system\n"); 633 } 634 635 static int imx6_pm_stby_poweroff_probe(void) 636 { 637 if (pm_power_off) { 638 pr_warn("%s: pm_power_off already claimed %p %ps!\n", 639 __func__, pm_power_off, pm_power_off); 640 return -EBUSY; 641 } 642 643 pm_power_off = imx6_pm_stby_poweroff; 644 return 0; 645 } 646 647 void __init imx6_pm_ccm_init(const char *ccm_compat) 648 { 649 struct device_node *np; 650 u32 val; 651 652 np = of_find_compatible_node(NULL, NULL, ccm_compat); 653 ccm_base = of_iomap(np, 0); 654 BUG_ON(!ccm_base); 655 656 /* 657 * Initialize CCM_CLPCR_LPM into RUN mode to avoid ARM core 658 * clock being shut down unexpectedly by WAIT mode. 659 */ 660 val = readl_relaxed(ccm_base + CLPCR); 661 val &= ~BM_CLPCR_LPM; 662 writel_relaxed(val, ccm_base + CLPCR); 663 664 if (of_property_read_bool(np, "fsl,pmic-stby-poweroff")) 665 imx6_pm_stby_poweroff_probe(); 666 667 of_node_put(np); 668 } 669 670 void __init imx6q_pm_init(void) 671 { 672 imx6_pm_common_init(&imx6q_pm_data); 673 } 674 675 void __init imx6dl_pm_init(void) 676 { 677 imx6_pm_common_init(&imx6dl_pm_data); 678 } 679 680 void __init imx6sl_pm_init(void) 681 { 682 struct regmap *gpr; 683 684 if (cpu_is_imx6sl()) { 685 imx6_pm_common_init(&imx6sl_pm_data); 686 } else { 687 imx6_pm_common_init(&imx6sll_pm_data); 688 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); 689 if (!IS_ERR(gpr)) 690 regmap_update_bits(gpr, IOMUXC_GPR5, 691 IMX6SLL_GPR5_AFCG_X_BYPASS_MASK, 0); 692 } 693 } 694 695 void __init imx6sx_pm_init(void) 696 { 697 imx6_pm_common_init(&imx6sx_pm_data); 698 } 699 700 void __init imx6ul_pm_init(void) 701 { 702 imx6_pm_common_init(&imx6ul_pm_data); 703 } 704