arch/arm/mach-omap2/control.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * OMAP2/3 System Control Module register access
   4  *
   5  * Copyright (C) 2007, 2012 Texas Instruments, Inc.
   6  * Copyright (C) 2007 Nokia Corporation
   7  *
   8  * Written by Paul Walmsley
   9  */
  10 #undef DEBUG
  11
  12 #include <linux/kernel.h>
  13 #include <linux/io.h>
  14 #include <linux/of_address.h>
  15 #include <linux/regmap.h>
  16 #include <linux/mfd/syscon.h>
  17 #include <linux/cpu_pm.h>
  18
  19 #include "soc.h"
  20 #include "iomap.h"
  21 #include "common.h"
  22 #include "cm-regbits-34xx.h"
  23 #include "prm-regbits-34xx.h"
  24 #include "prm3xxx.h"
  25 #include "cm3xxx.h"
  26 #include "sdrc.h"
  27 #include "pm.h"
  28 #include "control.h"
  29 #include "clock.h"
  30
  31 /* Used by omap3_ctrl_save_padconf() */
  32 #define START_PADCONF_SAVE              0x2
  33 #define PADCONF_SAVE_DONE               0x1
  34
  35 static void __iomem *omap2_ctrl_base;
  36 static s16 omap2_ctrl_offset;
  37
  38 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
  39 struct omap3_scratchpad {
  40         u32 boot_config_ptr;
  41         u32 public_restore_ptr;
  42         u32 secure_ram_restore_ptr;
  43         u32 sdrc_module_semaphore;
  44         u32 prcm_block_offset;
  45         u32 sdrc_block_offset;
  46 };
  47
  48 struct omap3_scratchpad_prcm_block {
  49         u32 prm_contents[2];
  50         u32 cm_contents[11];
  51         u32 prcm_block_size;
  52 };
  53
  54 struct omap3_scratchpad_sdrc_block {
  55         u16 sysconfig;
  56         u16 cs_cfg;
  57         u16 sharing;
  58         u16 err_type;
  59         u32 dll_a_ctrl;
  60         u32 dll_b_ctrl;
  61         u32 power;
  62         u32 cs_0;
  63         u32 mcfg_0;
  64         u16 mr_0;
  65         u16 emr_1_0;
  66         u16 emr_2_0;
  67         u16 emr_3_0;
  68         u32 actim_ctrla_0;
  69         u32 actim_ctrlb_0;
  70         u32 rfr_ctrl_0;
  71         u32 cs_1;
  72         u32 mcfg_1;
  73         u16 mr_1;
  74         u16 emr_1_1;
  75         u16 emr_2_1;
  76         u16 emr_3_1;
  77         u32 actim_ctrla_1;
  78         u32 actim_ctrlb_1;
  79         u32 rfr_ctrl_1;
  80         u16 dcdl_1_ctrl;
  81         u16 dcdl_2_ctrl;
  82         u32 flags;
  83         u32 block_size;
  84 };
  85
  86 void *omap3_secure_ram_storage;
  87
  88 /*
  89  * This is used to store ARM registers in SDRAM before attempting
  90  * an MPU OFF. The save and restore happens from the SRAM sleep code.
  91  * The address is stored in scratchpad, so that it can be used
  92  * during the restore path.
  93  */
  94 u32 omap3_arm_context[128];
  95
  96 struct omap3_control_regs {
  97         u32 sysconfig;
  98         u32 devconf0;
  99         u32 mem_dftrw0;
 100         u32 mem_dftrw1;
 101         u32 msuspendmux_0;
 102         u32 msuspendmux_1;
 103         u32 msuspendmux_2;
 104         u32 msuspendmux_3;
 105         u32 msuspendmux_4;
 106         u32 msuspendmux_5;
 107         u32 sec_ctrl;
 108         u32 devconf1;
 109         u32 csirxfe;
 110         u32 iva2_bootaddr;
 111         u32 iva2_bootmod;
 112         u32 wkup_ctrl;
 113         u32 debobs_0;
 114         u32 debobs_1;
 115         u32 debobs_2;
 116         u32 debobs_3;
 117         u32 debobs_4;
 118         u32 debobs_5;
 119         u32 debobs_6;
 120         u32 debobs_7;
 121         u32 debobs_8;
 122         u32 prog_io0;
 123         u32 prog_io1;
 124         u32 dss_dpll_spreading;
 125         u32 core_dpll_spreading;
 126         u32 per_dpll_spreading;
 127         u32 usbhost_dpll_spreading;
 128         u32 pbias_lite;
 129         u32 temp_sensor;
 130         u32 sramldo4;
 131         u32 sramldo5;
 132         u32 csi;
 133         u32 padconf_sys_nirq;
 134 };
 135
 136 static struct omap3_control_regs control_context;
 137 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
 138
 139 void __init omap2_set_globals_control(void __iomem *ctrl)
 140 {
 141         omap2_ctrl_base = ctrl;
 142 }
 143
 144 u8 omap_ctrl_readb(u16 offset)
 145 {
 146         u32 val;
 147         u8 byte_offset = offset & 0x3;
 148
 149         val = omap_ctrl_readl(offset);
 150
 151         return (val >> (byte_offset * 8)) & 0xff;
 152 }
 153
 154 u16 omap_ctrl_readw(u16 offset)
 155 {
 156         u32 val;
 157         u16 byte_offset = offset & 0x2;
 158
 159         val = omap_ctrl_readl(offset);
 160
 161         return (val >> (byte_offset * 8)) & 0xffff;
 162 }
 163
 164 u32 omap_ctrl_readl(u16 offset)
 165 {
 166         offset &= 0xfffc;
 167
 168         return readl_relaxed(omap2_ctrl_base + offset);
 169 }
 170
 171 void omap_ctrl_writeb(u8 val, u16 offset)
 172 {
 173         u32 tmp;
 174         u8 byte_offset = offset & 0x3;
 175
 176         tmp = omap_ctrl_readl(offset);
 177
 178         tmp &= 0xffffffff ^ (0xff << (byte_offset * 8));
 179         tmp |= val << (byte_offset * 8);
 180
 181         omap_ctrl_writel(tmp, offset);
 182 }
 183
 184 void omap_ctrl_writew(u16 val, u16 offset)
 185 {
 186         u32 tmp;
 187         u8 byte_offset = offset & 0x2;
 188
 189         tmp = omap_ctrl_readl(offset);
 190
 191         tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8));
 192         tmp |= val << (byte_offset * 8);
 193
 194         omap_ctrl_writel(tmp, offset);
 195 }
 196
 197 void omap_ctrl_writel(u32 val, u16 offset)
 198 {
 199         offset &= 0xfffc;
 200         writel_relaxed(val, omap2_ctrl_base + offset);
 201 }
 202
 203 #ifdef CONFIG_ARCH_OMAP3
 204
 205 /**
 206  * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
 207  * @bootmode: 8-bit value to pass to some boot code
 208  *
 209  * Set the bootmode in the scratchpad RAM.  This is used after the
 210  * system restarts.  Not sure what actually uses this - it may be the
 211  * bootloader, rather than the boot ROM - contrary to the preserved
 212  * comment below.  No return value.
 213  */
 214 void omap3_ctrl_write_boot_mode(u8 bootmode)
 215 {
 216         u32 l;
 217
 218         l = ('B' << 24) | ('M' << 16) | bootmode;
 219
 220         /*
 221          * Reserve the first word in scratchpad for communicating
 222          * with the boot ROM. A pointer to a data structure
 223          * describing the boot process can be stored there,
 224          * cf. OMAP34xx TRM, Initialization / Software Booting
 225          * Configuration.
 226          *
 227          * XXX This should use some omap_ctrl_writel()-type function
 228          */
 229         writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
 230 }
 231
 232 #endif
 233
 234 /**
 235  * omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor
 236  * @bootaddr: physical address of the boot loader
 237  *
 238  * Set boot address for the boot loader of a supported processor
 239  * when a power ON sequence occurs.
 240  */
 241 void omap_ctrl_write_dsp_boot_addr(u32 bootaddr)
 242 {
 243         u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR :
 244                      cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR :
 245                      cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
 246                      soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
 247                      0;
 248
 249         if (!offset) {
 250                 pr_err("%s: unsupported omap type\n", __func__);
 251                 return;
 252         }
 253
 254         omap_ctrl_writel(bootaddr, offset);
 255 }
 256
 257 /**
 258  * omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor
 259  * @bootmode: 8-bit value to pass to some boot code
 260  *
 261  * Sets boot mode for the boot loader of a supported processor
 262  * when a power ON sequence occurs.
 263  */
 264 void omap_ctrl_write_dsp_boot_mode(u8 bootmode)
 265 {
 266         u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD :
 267                      cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD :
 268                      0;
 269
 270         if (!offset) {
 271                 pr_err("%s: unsupported omap type\n", __func__);
 272                 return;
 273         }
 274
 275         omap_ctrl_writel(bootmode, offset);
 276 }
 277
 278 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
 279 /*
 280  * Clears the scratchpad contents in case of cold boot-
 281  * called during bootup
 282  */
 283 void omap3_clear_scratchpad_contents(void)
 284 {
 285         u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
 286         void __iomem *v_addr;
 287         u32 offset = 0;
 288
 289         v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
 290         if (omap3xxx_prm_clear_global_cold_reset()) {
 291                 for ( ; offset <= max_offset; offset += 0x4)
 292                         writel_relaxed(0x0, (v_addr + offset));
 293         }
 294 }
 295
 296 /* Populate the scratchpad structure with restore structure */
 297 void omap3_save_scratchpad_contents(void)
 298 {
 299         void  __iomem *scratchpad_address;
 300         u32 arm_context_addr;
 301         struct omap3_scratchpad scratchpad_contents;
 302         struct omap3_scratchpad_prcm_block prcm_block_contents;
 303         struct omap3_scratchpad_sdrc_block sdrc_block_contents;
 304
 305         /*
 306          * Populate the Scratchpad contents
 307          *
 308          * The "get_*restore_pointer" functions are used to provide a
 309          * physical restore address where the ROM code jumps while waking
 310          * up from MPU OFF/OSWR state.
 311          * The restore pointer is stored into the scratchpad.
 312          */
 313         scratchpad_contents.boot_config_ptr = 0x0;
 314         if (cpu_is_omap3630())
 315                 scratchpad_contents.public_restore_ptr =
 316                         __pa_symbol(omap3_restore_3630);
 317         else if (omap_rev() != OMAP3430_REV_ES3_0 &&
 318                                         omap_rev() != OMAP3430_REV_ES3_1 &&
 319                                         omap_rev() != OMAP3430_REV_ES3_1_2)
 320                 scratchpad_contents.public_restore_ptr =
 321                         __pa_symbol(omap3_restore);
 322         else
 323                 scratchpad_contents.public_restore_ptr =
 324                         __pa_symbol(omap3_restore_es3);
 325
 326         if (omap_type() == OMAP2_DEVICE_TYPE_GP)
 327                 scratchpad_contents.secure_ram_restore_ptr = 0x0;
 328         else
 329                 scratchpad_contents.secure_ram_restore_ptr =
 330                         (u32) __pa(omap3_secure_ram_storage);
 331         scratchpad_contents.sdrc_module_semaphore = 0x0;
 332         scratchpad_contents.prcm_block_offset = 0x2C;
 333         scratchpad_contents.sdrc_block_offset = 0x64;
 334
 335         /* Populate the PRCM block contents */
 336         omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents);
 337         omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
 338
 339         prcm_block_contents.prcm_block_size = 0x0;
 340
 341         /* Populate the SDRC block contents */
 342         sdrc_block_contents.sysconfig =
 343                         (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
 344         sdrc_block_contents.cs_cfg =
 345                         (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
 346         sdrc_block_contents.sharing =
 347                         (sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
 348         sdrc_block_contents.err_type =
 349                         (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
 350         sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
 351         sdrc_block_contents.dll_b_ctrl = 0x0;
 352         /*
 353          * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
 354          * be programed to issue automatic self refresh on timeout
 355          * of AUTO_CNT = 1 prior to any transition to OFF mode.
 356          */
 357         if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
 358                         && (omap_rev() >= OMAP3430_REV_ES3_0))
 359                 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
 360                                 ~(SDRC_POWER_AUTOCOUNT_MASK|
 361                                 SDRC_POWER_CLKCTRL_MASK)) |
 362                                 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
 363                                 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
 364         else
 365                 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
 366
 367         sdrc_block_contents.cs_0 = 0x0;
 368         sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
 369         sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
 370         sdrc_block_contents.emr_1_0 = 0x0;
 371         sdrc_block_contents.emr_2_0 = 0x0;
 372         sdrc_block_contents.emr_3_0 = 0x0;
 373         sdrc_block_contents.actim_ctrla_0 =
 374                         sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
 375         sdrc_block_contents.actim_ctrlb_0 =
 376                         sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
 377         sdrc_block_contents.rfr_ctrl_0 =
 378                         sdrc_read_reg(SDRC_RFR_CTRL_0);
 379         sdrc_block_contents.cs_1 = 0x0;
 380         sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
 381         sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
 382         sdrc_block_contents.emr_1_1 = 0x0;
 383         sdrc_block_contents.emr_2_1 = 0x0;
 384         sdrc_block_contents.emr_3_1 = 0x0;
 385         sdrc_block_contents.actim_ctrla_1 =
 386                         sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
 387         sdrc_block_contents.actim_ctrlb_1 =
 388                         sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
 389         sdrc_block_contents.rfr_ctrl_1 =
 390                         sdrc_read_reg(SDRC_RFR_CTRL_1);
 391         sdrc_block_contents.dcdl_1_ctrl = 0x0;
 392         sdrc_block_contents.dcdl_2_ctrl = 0x0;
 393         sdrc_block_contents.flags = 0x0;
 394         sdrc_block_contents.block_size = 0x0;
 395
 396         arm_context_addr = __pa_symbol(omap3_arm_context);
 397
 398         /* Copy all the contents to the scratchpad location */
 399         scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
 400         memcpy_toio(scratchpad_address, &scratchpad_contents,
 401                  sizeof(scratchpad_contents));
 402         /* Scratchpad contents being 32 bits, a divide by 4 done here */
 403         memcpy_toio(scratchpad_address +
 404                 scratchpad_contents.prcm_block_offset,
 405                 &prcm_block_contents, sizeof(prcm_block_contents));
 406         memcpy_toio(scratchpad_address +
 407                 scratchpad_contents.sdrc_block_offset,
 408                 &sdrc_block_contents, sizeof(sdrc_block_contents));
 409         /*
 410          * Copies the address of the location in SDRAM where ARM
 411          * registers get saved during a MPU OFF transition.
 412          */
 413         memcpy_toio(scratchpad_address +
 414                 scratchpad_contents.sdrc_block_offset +
 415                 sizeof(sdrc_block_contents), &arm_context_addr, 4);
 416 }
 417
 418 void omap3_control_save_context(void)
 419 {
 420         control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
 421         control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 422         control_context.mem_dftrw0 =
 423                         omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
 424         control_context.mem_dftrw1 =
 425                         omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
 426         control_context.msuspendmux_0 =
 427                         omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
 428         control_context.msuspendmux_1 =
 429                         omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
 430         control_context.msuspendmux_2 =
 431                         omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
 432         control_context.msuspendmux_3 =
 433                         omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
 434         control_context.msuspendmux_4 =
 435                         omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
 436         control_context.msuspendmux_5 =
 437                         omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
 438         control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
 439         control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
 440         control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
 441         control_context.iva2_bootaddr =
 442                         omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
 443         control_context.iva2_bootmod =
 444                         omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
 445         control_context.wkup_ctrl = omap_ctrl_readl(OMAP34XX_CONTROL_WKUP_CTRL);
 446         control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
 447         control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
 448         control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
 449         control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
 450         control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
 451         control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
 452         control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
 453         control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
 454         control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
 455         control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
 456         control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
 457         control_context.dss_dpll_spreading =
 458                         omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
 459         control_context.core_dpll_spreading =
 460                         omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
 461         control_context.per_dpll_spreading =
 462                         omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
 463         control_context.usbhost_dpll_spreading =
 464                 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
 465         control_context.pbias_lite =
 466                         omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
 467         control_context.temp_sensor =
 468                         omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
 469         control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
 470         control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
 471         control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
 472         control_context.padconf_sys_nirq =
 473                 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
 474 }
 475
 476 void omap3_control_restore_context(void)
 477 {
 478         omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
 479         omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
 480         omap_ctrl_writel(control_context.mem_dftrw0,
 481                                         OMAP343X_CONTROL_MEM_DFTRW0);
 482         omap_ctrl_writel(control_context.mem_dftrw1,
 483                                         OMAP343X_CONTROL_MEM_DFTRW1);
 484         omap_ctrl_writel(control_context.msuspendmux_0,
 485                                         OMAP2_CONTROL_MSUSPENDMUX_0);
 486         omap_ctrl_writel(control_context.msuspendmux_1,
 487                                         OMAP2_CONTROL_MSUSPENDMUX_1);
 488         omap_ctrl_writel(control_context.msuspendmux_2,
 489                                         OMAP2_CONTROL_MSUSPENDMUX_2);
 490         omap_ctrl_writel(control_context.msuspendmux_3,
 491                                         OMAP2_CONTROL_MSUSPENDMUX_3);
 492         omap_ctrl_writel(control_context.msuspendmux_4,
 493                                         OMAP2_CONTROL_MSUSPENDMUX_4);
 494         omap_ctrl_writel(control_context.msuspendmux_5,
 495                                         OMAP2_CONTROL_MSUSPENDMUX_5);
 496         omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
 497         omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
 498         omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
 499         omap_ctrl_writel(control_context.iva2_bootaddr,
 500                                         OMAP343X_CONTROL_IVA2_BOOTADDR);
 501         omap_ctrl_writel(control_context.iva2_bootmod,
 502                                         OMAP343X_CONTROL_IVA2_BOOTMOD);
 503         omap_ctrl_writel(control_context.wkup_ctrl, OMAP34XX_CONTROL_WKUP_CTRL);
 504         omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
 505         omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
 506         omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
 507         omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
 508         omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
 509         omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
 510         omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
 511         omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
 512         omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
 513         omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
 514         omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
 515         omap_ctrl_writel(control_context.dss_dpll_spreading,
 516                                         OMAP343X_CONTROL_DSS_DPLL_SPREADING);
 517         omap_ctrl_writel(control_context.core_dpll_spreading,
 518                                         OMAP343X_CONTROL_CORE_DPLL_SPREADING);
 519         omap_ctrl_writel(control_context.per_dpll_spreading,
 520                                         OMAP343X_CONTROL_PER_DPLL_SPREADING);
 521         omap_ctrl_writel(control_context.usbhost_dpll_spreading,
 522                                 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
 523         omap_ctrl_writel(control_context.pbias_lite,
 524                                         OMAP343X_CONTROL_PBIAS_LITE);
 525         omap_ctrl_writel(control_context.temp_sensor,
 526                                         OMAP343X_CONTROL_TEMP_SENSOR);
 527         omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
 528         omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
 529         omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
 530         omap_ctrl_writel(control_context.padconf_sys_nirq,
 531                          OMAP343X_CONTROL_PADCONF_SYSNIRQ);
 532 }
 533
 534 void omap3630_ctrl_disable_rta(void)
 535 {
 536         if (!cpu_is_omap3630())
 537                 return;
 538         omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
 539 }
 540
 541 /**
 542  * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
 543  *
 544  * Tell the SCM to start saving the padconf registers, then wait for
 545  * the process to complete.  Returns 0 unconditionally, although it
 546  * should also eventually be able to return -ETIMEDOUT, if the save
 547  * does not complete.
 548  *
 549  * XXX This function is missing a timeout.  What should it be?
 550  */
 551 int omap3_ctrl_save_padconf(void)
 552 {
 553         u32 cpo;
 554
 555         /* Save the padconf registers */
 556         cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
 557         cpo |= START_PADCONF_SAVE;
 558         omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
 559
 560         /* wait for the save to complete */
 561         while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
 562                  & PADCONF_SAVE_DONE))
 563                 udelay(1);
 564
 565         return 0;
 566 }
 567
 568 /**
 569  * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
 570  *
 571  * Sets the bootmode for IVA2 to idle. This is needed by the PM code to
 572  * force disable IVA2 so that it does not prevent any low-power states.
 573  */
 574 static void __init omap3_ctrl_set_iva_bootmode_idle(void)
 575 {
 576         omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
 577                          OMAP343X_CONTROL_IVA2_BOOTMOD);
 578 }
 579
 580 /**
 581  * omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle
 582  *
 583  * Sets up the pads controlling the stacked modem in such way that the
 584  * device can enter idle.
 585  */
 586 static void __init omap3_ctrl_setup_d2d_padconf(void)
 587 {
 588         u16 mask, padconf;
 589
 590         /*
 591          * In a stand alone OMAP3430 where there is not a stacked
 592          * modem for the D2D Idle Ack and D2D MStandby must be pulled
 593          * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
 594          * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up.
 595          */
 596         mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
 597         padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
 598         padconf |= mask;
 599         omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
 600
 601         padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
 602         padconf |= mask;
 603         omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
 604 }
 605
 606 /**
 607  * omap3_ctrl_init - does static initializations for control module
 608  *
 609  * Initializes system control module. This sets up the sysconfig autoidle,
 610  * and sets up modem and iva2 so that they can be idled properly.
 611  */
 612 void __init omap3_ctrl_init(void)
 613 {
 614         omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
 615
 616         omap3_ctrl_set_iva_bootmode_idle();
 617
 618         omap3_ctrl_setup_d2d_padconf();
 619 }
 620 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
 621
 622 static unsigned long am43xx_control_reg_offsets[] = {
 623         AM33XX_CONTROL_SYSCONFIG_OFFSET,
 624         AM33XX_CONTROL_STATUS_OFFSET,
 625         AM43XX_CONTROL_MPU_L2_CTRL_OFFSET,
 626         AM33XX_CONTROL_CORE_SLDO_CTRL_OFFSET,
 627         AM33XX_CONTROL_MPU_SLDO_CTRL_OFFSET,
 628         AM33XX_CONTROL_CLK32KDIVRATIO_CTRL_OFFSET,
 629         AM33XX_CONTROL_BANDGAP_CTRL_OFFSET,
 630         AM33XX_CONTROL_BANDGAP_TRIM_OFFSET,
 631         AM33XX_CONTROL_PLL_CLKINPULOW_CTRL_OFFSET,
 632         AM33XX_CONTROL_MOSC_CTRL_OFFSET,
 633         AM33XX_CONTROL_DEEPSLEEP_CTRL_OFFSET,
 634         AM43XX_CONTROL_DISPLAY_PLL_SEL_OFFSET,
 635         AM33XX_CONTROL_INIT_PRIORITY_0_OFFSET,
 636         AM33XX_CONTROL_INIT_PRIORITY_1_OFFSET,
 637         AM33XX_CONTROL_TPTC_CFG_OFFSET,
 638         AM33XX_CONTROL_USB_CTRL0_OFFSET,
 639         AM33XX_CONTROL_USB_CTRL1_OFFSET,
 640         AM43XX_CONTROL_USB_CTRL2_OFFSET,
 641         AM43XX_CONTROL_GMII_SEL_OFFSET,
 642         AM43XX_CONTROL_MPUSS_CTRL_OFFSET,
 643         AM43XX_CONTROL_TIMER_CASCADE_CTRL_OFFSET,
 644         AM43XX_CONTROL_PWMSS_CTRL_OFFSET,
 645         AM33XX_CONTROL_MREQPRIO_0_OFFSET,
 646         AM33XX_CONTROL_MREQPRIO_1_OFFSET,
 647         AM33XX_CONTROL_HW_EVENT_SEL_GRP1_OFFSET,
 648         AM33XX_CONTROL_HW_EVENT_SEL_GRP2_OFFSET,
 649         AM33XX_CONTROL_HW_EVENT_SEL_GRP3_OFFSET,
 650         AM33XX_CONTROL_HW_EVENT_SEL_GRP4_OFFSET,
 651         AM33XX_CONTROL_SMRT_CTRL_OFFSET,
 652         AM33XX_CONTROL_MPUSS_HW_DEBUG_SEL_OFFSET,
 653         AM43XX_CONTROL_CQDETECT_STS_OFFSET,
 654         AM43XX_CONTROL_CQDETECT_STS2_OFFSET,
 655         AM43XX_CONTROL_VTP_CTRL_OFFSET,
 656         AM33XX_CONTROL_VREF_CTRL_OFFSET,
 657         AM33XX_CONTROL_TPCC_EVT_MUX_0_3_OFFSET,
 658         AM33XX_CONTROL_TPCC_EVT_MUX_4_7_OFFSET,
 659         AM33XX_CONTROL_TPCC_EVT_MUX_8_11_OFFSET,
 660         AM33XX_CONTROL_TPCC_EVT_MUX_12_15_OFFSET,
 661         AM33XX_CONTROL_TPCC_EVT_MUX_16_19_OFFSET,
 662         AM33XX_CONTROL_TPCC_EVT_MUX_20_23_OFFSET,
 663         AM33XX_CONTROL_TPCC_EVT_MUX_24_27_OFFSET,
 664         AM33XX_CONTROL_TPCC_EVT_MUX_28_31_OFFSET,
 665         AM33XX_CONTROL_TPCC_EVT_MUX_32_35_OFFSET,
 666         AM33XX_CONTROL_TPCC_EVT_MUX_36_39_OFFSET,
 667         AM33XX_CONTROL_TPCC_EVT_MUX_40_43_OFFSET,
 668         AM33XX_CONTROL_TPCC_EVT_MUX_44_47_OFFSET,
 669         AM33XX_CONTROL_TPCC_EVT_MUX_48_51_OFFSET,
 670         AM33XX_CONTROL_TPCC_EVT_MUX_52_55_OFFSET,
 671         AM33XX_CONTROL_TPCC_EVT_MUX_56_59_OFFSET,
 672         AM33XX_CONTROL_TPCC_EVT_MUX_60_63_OFFSET,
 673         AM33XX_CONTROL_TIMER_EVT_CAPT_OFFSET,
 674         AM33XX_CONTROL_ECAP_EVT_CAPT_OFFSET,
 675         AM33XX_CONTROL_ADC_EVT_CAPT_OFFSET,
 676         AM43XX_CONTROL_ADC1_EVT_CAPT_OFFSET,
 677         AM33XX_CONTROL_RESET_ISO_OFFSET,
 678 };
 679
 680 static u32 am33xx_control_vals[ARRAY_SIZE(am43xx_control_reg_offsets)];
 681
 682 /**
 683  * am43xx_control_save_context - Save the wakeup domain registers
 684  *
 685  * Save the wkup domain registers
 686  */
 687 static void am43xx_control_save_context(void)
 688 {
 689         int i;
 690
 691         for (i = 0; i < ARRAY_SIZE(am43xx_control_reg_offsets); i++)
 692                 am33xx_control_vals[i] =
 693                                 omap_ctrl_readl(am43xx_control_reg_offsets[i]);
 694 }
 695
 696 /**
 697  * am43xx_control_restore_context - Restore the wakeup domain registers
 698  *
 699  * Restore the wkup domain registers
 700  */
 701 static void am43xx_control_restore_context(void)
 702 {
 703         int i;
 704
 705         for (i = 0; i < ARRAY_SIZE(am43xx_control_reg_offsets); i++)
 706                 omap_ctrl_writel(am33xx_control_vals[i],
 707                                  am43xx_control_reg_offsets[i]);
 708 }
 709
 710 static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v)
 711 {
 712         switch (cmd) {
 713         case CPU_CLUSTER_PM_ENTER:
 714                 if (enable_off_mode)
 715                         am43xx_control_save_context();
 716                 break;
 717         case CPU_CLUSTER_PM_EXIT:
 718                 if (enable_off_mode)
 719                         am43xx_control_restore_context();
 720                 break;
 721         }
 722
 723         return NOTIFY_OK;
 724 }
 725
 726 struct control_init_data {
 727         int index;
 728         void __iomem *mem;
 729         s16 offset;
 730 };
 731
 732 static struct control_init_data ctrl_data = {
 733         .index = TI_CLKM_CTRL,
 734 };
 735
 736 static const struct control_init_data omap2_ctrl_data = {
 737         .index = TI_CLKM_CTRL,
 738         .offset = -OMAP2_CONTROL_GENERAL,
 739 };
 740
 741 static const struct control_init_data ctrl_aux_data = {
 742         .index = TI_CLKM_CTRL_AUX,
 743 };
 744
 745 static const struct of_device_id omap_scrm_dt_match_table[] = {
 746         { .compatible = "ti,am3-scm", .data = &ctrl_data },
 747         { .compatible = "ti,am4-scm", .data = &ctrl_data },
 748         { .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data },
 749         { .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data },
 750         { .compatible = "ti,dm814-scm", .data = &ctrl_data },
 751         { .compatible = "ti,dm816-scrm", .data = &ctrl_data },
 752         { .compatible = "ti,omap4-scm-core", .data = &ctrl_data },
 753         { .compatible = "ti,omap5-scm-core", .data = &ctrl_data },
 754         { .compatible = "ti,omap5-scm-wkup-pad-conf", .data = &ctrl_aux_data },
 755         { .compatible = "ti,dra7-scm-core", .data = &ctrl_data },
 756         { }
 757 };
 758
 759 /**
 760  * omap2_control_base_init - initialize iomappings for the control driver
 761  *
 762  * Detects and initializes the iomappings for the control driver, based
 763  * on the DT data. Returns 0 in success, negative error value
 764  * otherwise.
 765  */
 766 int __init omap2_control_base_init(void)
 767 {
 768         struct device_node *np;
 769         const struct of_device_id *match;
 770         struct control_init_data *data;
 771         void __iomem *mem;
 772
 773         for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
 774                 data = (struct control_init_data *)match->data;
 775
 776                 mem = of_iomap(np, 0);
 777                 if (!mem)
 778                         return -ENOMEM;
 779
 780                 if (data->index == TI_CLKM_CTRL) {
 781                         omap2_ctrl_base = mem;
 782                         omap2_ctrl_offset = data->offset;
 783                 }
 784
 785                 data->mem = mem;
 786         }
 787
 788         return 0;
 789 }
 790
 791 /**
 792  * omap_control_init - low level init for the control driver
 793  *
 794  * Initializes the low level clock infrastructure for control driver.
 795  * Returns 0 in success, negative error value in failure.
 796  */
 797 int __init omap_control_init(void)
 798 {
 799         struct device_node *np, *scm_conf;
 800         const struct of_device_id *match;
 801         const struct omap_prcm_init_data *data;
 802         int ret;
 803         struct regmap *syscon;
 804         static struct notifier_block nb;
 805
 806         for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
 807                 data = match->data;
 808
 809                 /*
 810                  * Check if we have scm_conf node, if yes, use this to
 811                  * access clock registers.
 812                  */
 813                 scm_conf = of_get_child_by_name(np, "scm_conf");
 814
 815                 if (scm_conf) {
 816                         syscon = syscon_node_to_regmap(scm_conf);
 817
 818                         if (IS_ERR(syscon))
 819                                 return PTR_ERR(syscon);
 820
 821                         if (of_get_child_by_name(scm_conf, "clocks")) {
 822                                 ret = omap2_clk_provider_init(scm_conf,
 823                                                               data->index,
 824                                                               syscon, NULL);
 825                                 if (ret)
 826                                         return ret;
 827                         }
 828                 } else {
 829                         /* No scm_conf found, direct access */
 830                         ret = omap2_clk_provider_init(np, data->index, NULL,
 831                                                       data->mem);
 832                         if (ret)
 833                                 return ret;
 834                 }
 835         }
 836
 837         /* Only AM43XX can lose ctrl registers context during rtc-ddr suspend */
 838         if (soc_is_am43xx()) {
 839                 nb.notifier_call = cpu_notifier;
 840                 cpu_pm_register_notifier(&nb);
 841         }
 842
 843         return 0;
 844 }
 845
 846 /**
 847  * omap3_control_legacy_iomap_init - legacy iomap init for clock providers
 848  *
 849  * Legacy iomap init for clock provider. Needed only by legacy boot mode,
 850  * where the base addresses are not parsed from DT, but still required
 851  * by the clock driver to be setup properly.
 852  */
 853 void __init omap3_control_legacy_iomap_init(void)
 854 {
 855         omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base);
 856 }