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