arch/arm/mach-imx/pm-imx6.c

   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         imx_gpc_hwirq_unmask(0);
 358         writel_relaxed(val, ccm_base + CLPCR);
 359         imx_gpc_hwirq_mask(0);
 360
 361         return 0;
 362 }
 363
 364 static int imx6q_suspend_finish(unsigned long val)
 365 {
 366         if (!imx6_suspend_in_ocram_fn) {
 367                 cpu_do_idle();
 368         } else {
 369                 /*
 370                  * call low level suspend function in ocram,
 371                  * as we need to float DDR IO.
 372                  */
 373                 local_flush_tlb_all();
 374                 /* check if need to flush internal L2 cache */
 375                 if (!((struct imx6_cpu_pm_info *)
 376                         suspend_ocram_base)->l2_base.vbase)
 377                         flush_cache_all();
 378                 imx6_suspend_in_ocram_fn(suspend_ocram_base);
 379         }
 380
 381         return 0;
 382 }
 383
 384 static int imx6q_pm_enter(suspend_state_t state)
 385 {
 386         switch (state) {
 387         case PM_SUSPEND_STANDBY:
 388                 imx6_set_lpm(STOP_POWER_ON);
 389                 imx6_set_int_mem_clk_lpm(true);
 390                 imx_gpc_pre_suspend(false);
 391                 if (cpu_is_imx6sl())
 392                         imx6sl_set_wait_clk(true);
 393                 /* Zzz ... */
 394                 cpu_do_idle();
 395                 if (cpu_is_imx6sl())
 396                         imx6sl_set_wait_clk(false);
 397                 imx_gpc_post_resume();
 398                 imx6_set_lpm(WAIT_CLOCKED);
 399                 break;
 400         case PM_SUSPEND_MEM:
 401                 imx6_set_lpm(STOP_POWER_OFF);
 402                 imx6_set_int_mem_clk_lpm(false);
 403                 imx6q_enable_wb(true);
 404                 /*
 405                  * For suspend into ocram, asm code already take care of
 406                  * RBC setting, so we do NOT need to do that here.
 407                  */
 408                 if (!imx6_suspend_in_ocram_fn)
 409                         imx6_enable_rbc(true);
 410                 imx_gpc_pre_suspend(true);
 411                 imx_anatop_pre_suspend();
 412                 /* Zzz ... */
 413                 cpu_suspend(0, imx6q_suspend_finish);
 414                 if (cpu_is_imx6q() || cpu_is_imx6dl())
 415                         imx_smp_prepare();
 416                 imx_anatop_post_resume();
 417                 imx_gpc_post_resume();
 418                 imx6_enable_rbc(false);
 419                 imx6q_enable_wb(false);
 420                 imx6_set_int_mem_clk_lpm(true);
 421                 imx6_set_lpm(WAIT_CLOCKED);
 422                 break;
 423         default:
 424                 return -EINVAL;
 425         }
 426
 427         return 0;
 428 }
 429
 430 static int imx6q_pm_valid(suspend_state_t state)
 431 {
 432         return (state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM);
 433 }
 434
 435 static const struct platform_suspend_ops imx6q_pm_ops = {
 436         .enter = imx6q_pm_enter,
 437         .valid = imx6q_pm_valid,
 438 };
 439
 440 static int __init imx6_pm_get_base(struct imx6_pm_base *base,
 441                                 const char *compat)
 442 {
 443         struct device_node *node;
 444         struct resource res;
 445         int ret = 0;
 446
 447         node = of_find_compatible_node(NULL, NULL, compat);
 448         if (!node)
 449                 return -ENODEV;
 450
 451         ret = of_address_to_resource(node, 0, &res);
 452         if (ret)
 453                 goto put_node;
 454
 455         base->pbase = res.start;
 456         base->vbase = ioremap(res.start, resource_size(&res));
 457         if (!base->vbase)
 458                 ret = -ENOMEM;
 459
 460 put_node:
 461         of_node_put(node);
 462         return ret;
 463 }
 464
 465 static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata)
 466 {
 467         phys_addr_t ocram_pbase;
 468         struct device_node *node;
 469         struct platform_device *pdev;
 470         struct imx6_cpu_pm_info *pm_info;
 471         struct gen_pool *ocram_pool;
 472         unsigned long ocram_base;
 473         int i, ret = 0;
 474         const u32 *mmdc_offset_array;
 475
 476         suspend_set_ops(&imx6q_pm_ops);
 477
 478         if (!socdata) {
 479                 pr_warn("%s: invalid argument!\n", __func__);
 480                 return -EINVAL;
 481         }
 482
 483         node = of_find_compatible_node(NULL, NULL, "mmio-sram");
 484         if (!node) {
 485                 pr_warn("%s: failed to find ocram node!\n", __func__);
 486                 return -ENODEV;
 487         }
 488
 489         pdev = of_find_device_by_node(node);
 490         if (!pdev) {
 491                 pr_warn("%s: failed to find ocram device!\n", __func__);
 492                 ret = -ENODEV;
 493                 goto put_node;
 494         }
 495
 496         ocram_pool = gen_pool_get(&pdev->dev, NULL);
 497         if (!ocram_pool) {
 498                 pr_warn("%s: ocram pool unavailable!\n", __func__);
 499                 ret = -ENODEV;
 500                 goto put_node;
 501         }
 502
 503         ocram_base = gen_pool_alloc(ocram_pool, MX6Q_SUSPEND_OCRAM_SIZE);
 504         if (!ocram_base) {
 505                 pr_warn("%s: unable to alloc ocram!\n", __func__);
 506                 ret = -ENOMEM;
 507                 goto put_node;
 508         }
 509
 510         ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
 511
 512         suspend_ocram_base = __arm_ioremap_exec(ocram_pbase,
 513                 MX6Q_SUSPEND_OCRAM_SIZE, false);
 514
 515         memset(suspend_ocram_base, 0, sizeof(*pm_info));
 516         pm_info = suspend_ocram_base;
 517         pm_info->pbase = ocram_pbase;
 518         pm_info->resume_addr = __pa_symbol(v7_cpu_resume);
 519         pm_info->pm_info_size = sizeof(*pm_info);
 520
 521         /*
 522          * ccm physical address is not used by asm code currently,
 523          * so get ccm virtual address directly.
 524          */
 525         pm_info->ccm_base.vbase = ccm_base;
 526
 527         ret = imx6_pm_get_base(&pm_info->mmdc_base, socdata->mmdc_compat);
 528         if (ret) {
 529                 pr_warn("%s: failed to get mmdc base %d!\n", __func__, ret);
 530                 goto put_node;
 531         }
 532
 533         ret = imx6_pm_get_base(&pm_info->src_base, socdata->src_compat);
 534         if (ret) {
 535                 pr_warn("%s: failed to get src base %d!\n", __func__, ret);
 536                 goto src_map_failed;
 537         }
 538
 539         ret = imx6_pm_get_base(&pm_info->iomuxc_base, socdata->iomuxc_compat);
 540         if (ret) {
 541                 pr_warn("%s: failed to get iomuxc base %d!\n", __func__, ret);
 542                 goto iomuxc_map_failed;
 543         }
 544
 545         ret = imx6_pm_get_base(&pm_info->gpc_base, socdata->gpc_compat);
 546         if (ret) {
 547                 pr_warn("%s: failed to get gpc base %d!\n", __func__, ret);
 548                 goto gpc_map_failed;
 549         }
 550
 551         if (socdata->pl310_compat) {
 552                 ret = imx6_pm_get_base(&pm_info->l2_base, socdata->pl310_compat);
 553                 if (ret) {
 554                         pr_warn("%s: failed to get pl310-cache base %d!\n",
 555                                 __func__, ret);
 556                         goto pl310_cache_map_failed;
 557                 }
 558         }
 559
 560         pm_info->ddr_type = imx_mmdc_get_ddr_type();
 561         pm_info->mmdc_io_num = socdata->mmdc_io_num;
 562         mmdc_offset_array = socdata->mmdc_io_offset;
 563
 564         for (i = 0; i < pm_info->mmdc_io_num; i++) {
 565                 pm_info->mmdc_io_val[i][0] =
 566                         mmdc_offset_array[i];
 567                 pm_info->mmdc_io_val[i][1] =
 568                         readl_relaxed(pm_info->iomuxc_base.vbase +
 569                         mmdc_offset_array[i]);
 570         }
 571
 572         imx6_suspend_in_ocram_fn = fncpy(
 573                 suspend_ocram_base + sizeof(*pm_info),
 574                 &imx6_suspend,
 575                 MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info));
 576
 577         goto put_node;
 578
 579 pl310_cache_map_failed:
 580         iounmap(pm_info->gpc_base.vbase);
 581 gpc_map_failed:
 582         iounmap(pm_info->iomuxc_base.vbase);
 583 iomuxc_map_failed:
 584         iounmap(pm_info->src_base.vbase);
 585 src_map_failed:
 586         iounmap(pm_info->mmdc_base.vbase);
 587 put_node:
 588         of_node_put(node);
 589
 590         return ret;
 591 }
 592
 593 static void __init imx6_pm_common_init(const struct imx6_pm_socdata
 594                                         *socdata)
 595 {
 596         struct regmap *gpr;
 597         int ret;
 598
 599         WARN_ON(!ccm_base);
 600
 601         if (IS_ENABLED(CONFIG_SUSPEND)) {
 602                 ret = imx6q_suspend_init(socdata);
 603                 if (ret)
 604                         pr_warn("%s: No DDR LPM support with suspend %d!\n",
 605                                 __func__, ret);
 606         }
 607
 608         /*
 609          * This is for SW workaround step #1 of ERR007265, see comments
 610          * in imx6_set_lpm for details of this errata.
 611          * Force IOMUXC irq pending, so that the interrupt to GPC can be
 612          * used to deassert dsm_request signal when the signal gets
 613          * asserted unexpectedly.
 614          */
 615         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 616         if (!IS_ERR(gpr))
 617                 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT,
 618                                    IMX6Q_GPR1_GINT);
 619 }
 620
 621 static void imx6_pm_stby_poweroff(void)
 622 {
 623         imx6_set_lpm(STOP_POWER_OFF);
 624         imx6q_suspend_finish(0);
 625
 626         mdelay(1000);
 627
 628         pr_emerg("Unable to poweroff system\n");
 629 }
 630
 631 static int imx6_pm_stby_poweroff_probe(void)
 632 {
 633         if (pm_power_off) {
 634                 pr_warn("%s: pm_power_off already claimed  %p %ps!\n",
 635                         __func__, pm_power_off, pm_power_off);
 636                 return -EBUSY;
 637         }
 638
 639         pm_power_off = imx6_pm_stby_poweroff;
 640         return 0;
 641 }
 642
 643 void __init imx6_pm_ccm_init(const char *ccm_compat)
 644 {
 645         struct device_node *np;
 646         u32 val;
 647
 648         np = of_find_compatible_node(NULL, NULL, ccm_compat);
 649         ccm_base = of_iomap(np, 0);
 650         BUG_ON(!ccm_base);
 651
 652         /*
 653          * Initialize CCM_CLPCR_LPM into RUN mode to avoid ARM core
 654          * clock being shut down unexpectedly by WAIT mode.
 655          */
 656         val = readl_relaxed(ccm_base + CLPCR);
 657         val &= ~BM_CLPCR_LPM;
 658         writel_relaxed(val, ccm_base + CLPCR);
 659
 660         if (of_property_read_bool(np, "fsl,pmic-stby-poweroff"))
 661                 imx6_pm_stby_poweroff_probe();
 662 }
 663
 664 void __init imx6q_pm_init(void)
 665 {
 666         imx6_pm_common_init(&imx6q_pm_data);
 667 }
 668
 669 void __init imx6dl_pm_init(void)
 670 {
 671         imx6_pm_common_init(&imx6dl_pm_data);
 672 }
 673
 674 void __init imx6sl_pm_init(void)
 675 {
 676         struct regmap *gpr;
 677
 678         if (cpu_is_imx6sl()) {
 679                 imx6_pm_common_init(&imx6sl_pm_data);
 680         } else {
 681                 imx6_pm_common_init(&imx6sll_pm_data);
 682                 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 683                 if (!IS_ERR(gpr))
 684                         regmap_update_bits(gpr, IOMUXC_GPR5,
 685                                 IMX6SLL_GPR5_AFCG_X_BYPASS_MASK, 0);
 686         }
 687 }
 688
 689 void __init imx6sx_pm_init(void)
 690 {
 691         imx6_pm_common_init(&imx6sx_pm_data);
 692 }
 693
 694 void __init imx6ul_pm_init(void)
 695 {
 696         imx6_pm_common_init(&imx6ul_pm_data);
 697 }