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

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

DEFINITIONS
