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