arch/arm/mach-omap2/cm3xxx.c

   1 /*
   2  * OMAP3xxx CM module functions
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  * Copyright (C) 2008-2010, 2012 Texas Instruments, Inc.
   6  * Paul Walmsley
   7  * Rajendra Nayak <rnayak@ti.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/types.h>
  16 #include <linux/delay.h>
  17 #include <linux/errno.h>
  18 #include <linux/err.h>
  19 #include <linux/io.h>
  20
  21 #include "prm2xxx_3xxx.h"
  22 #include "cm.h"
  23 #include "cm3xxx.h"
  24 #include "cm-regbits-34xx.h"
  25 #include "clockdomain.h"
  26
  27 static const u8 omap3xxx_cm_idlest_offs[] = {
  28         CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3
  29 };
  30
  31 /*
  32  *
  33  */
  34
  35 static void _write_clktrctrl(u8 c, s16 module, u32 mask)
  36 {
  37         u32 v;
  38
  39         v = omap2_cm_read_mod_reg(module, OMAP2_CM_CLKSTCTRL);
  40         v &= ~mask;
  41         v |= c << __ffs(mask);
  42         omap2_cm_write_mod_reg(v, module, OMAP2_CM_CLKSTCTRL);
  43 }
  44
  45 static bool omap3xxx_cm_is_clkdm_in_hwsup(s16 module, u32 mask)
  46 {
  47         u32 v;
  48
  49         v = omap2_cm_read_mod_reg(module, OMAP2_CM_CLKSTCTRL);
  50         v &= mask;
  51         v >>= __ffs(mask);
  52
  53         return (v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ? 1 : 0;
  54 }
  55
  56 static void omap3xxx_cm_clkdm_enable_hwsup(s16 module, u32 mask)
  57 {
  58         _write_clktrctrl(OMAP34XX_CLKSTCTRL_ENABLE_AUTO, module, mask);
  59 }
  60
  61 static void omap3xxx_cm_clkdm_disable_hwsup(s16 module, u32 mask)
  62 {
  63         _write_clktrctrl(OMAP34XX_CLKSTCTRL_DISABLE_AUTO, module, mask);
  64 }
  65
  66 static void omap3xxx_cm_clkdm_force_sleep(s16 module, u32 mask)
  67 {
  68         _write_clktrctrl(OMAP34XX_CLKSTCTRL_FORCE_SLEEP, module, mask);
  69 }
  70
  71 static void omap3xxx_cm_clkdm_force_wakeup(s16 module, u32 mask)
  72 {
  73         _write_clktrctrl(OMAP34XX_CLKSTCTRL_FORCE_WAKEUP, module, mask);
  74 }
  75
  76 /*
  77  *
  78  */
  79
  80 /**
  81  * omap3xxx_cm_wait_module_ready - wait for a module to leave idle or standby
  82  * @part: PRCM partition, ignored for OMAP3
  83  * @prcm_mod: PRCM module offset
  84  * @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3)
  85  * @idlest_shift: shift of the bit in the CM_IDLEST* register to check
  86  *
  87  * Wait for the PRCM to indicate that the module identified by
  88  * (@prcm_mod, @idlest_id, @idlest_shift) is clocked.  Return 0 upon
  89  * success or -EBUSY if the module doesn't enable in time.
  90  */
  91 static int omap3xxx_cm_wait_module_ready(u8 part, s16 prcm_mod, u16 idlest_id,
  92                                          u8 idlest_shift)
  93 {
  94         int ena = 0, i = 0;
  95         u8 cm_idlest_reg;
  96         u32 mask;
  97
  98         if (!idlest_id || (idlest_id > ARRAY_SIZE(omap3xxx_cm_idlest_offs)))
  99                 return -EINVAL;
 100
 101         cm_idlest_reg = omap3xxx_cm_idlest_offs[idlest_id - 1];
 102
 103         mask = 1 << idlest_shift;
 104         ena = 0;
 105
 106         omap_test_timeout(((omap2_cm_read_mod_reg(prcm_mod, cm_idlest_reg) &
 107                             mask) == ena), MAX_MODULE_READY_TIME, i);
 108
 109         return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
 110 }
 111
 112 /**
 113  * omap3xxx_cm_split_idlest_reg - split CM_IDLEST reg addr into its components
 114  * @idlest_reg: CM_IDLEST* virtual address
 115  * @prcm_inst: pointer to an s16 to return the PRCM instance offset
 116  * @idlest_reg_id: pointer to a u8 to return the CM_IDLESTx register ID
 117  *
 118  * XXX This function is only needed until absolute register addresses are
 119  * removed from the OMAP struct clk records.
 120  */
 121 static int omap3xxx_cm_split_idlest_reg(struct clk_omap_reg *idlest_reg,
 122                                         s16 *prcm_inst,
 123                                         u8 *idlest_reg_id)
 124 {
 125         unsigned long offs;
 126         u8 idlest_offs;
 127         int i;
 128
 129         idlest_offs = idlest_reg->offset & 0xff;
 130         for (i = 0; i < ARRAY_SIZE(omap3xxx_cm_idlest_offs); i++) {
 131                 if (idlest_offs == omap3xxx_cm_idlest_offs[i]) {
 132                         *idlest_reg_id = i + 1;
 133                         break;
 134                 }
 135         }
 136
 137         if (i == ARRAY_SIZE(omap3xxx_cm_idlest_offs))
 138                 return -EINVAL;
 139
 140         offs = idlest_reg->offset;
 141         offs &= 0xff00;
 142         *prcm_inst = offs;
 143
 144         return 0;
 145 }
 146
 147 /* Clockdomain low-level operations */
 148
 149 static int omap3xxx_clkdm_add_sleepdep(struct clockdomain *clkdm1,
 150                                        struct clockdomain *clkdm2)
 151 {
 152         omap2_cm_set_mod_reg_bits((1 << clkdm2->dep_bit),
 153                                   clkdm1->pwrdm.ptr->prcm_offs,
 154                                   OMAP3430_CM_SLEEPDEP);
 155         return 0;
 156 }
 157
 158 static int omap3xxx_clkdm_del_sleepdep(struct clockdomain *clkdm1,
 159                                        struct clockdomain *clkdm2)
 160 {
 161         omap2_cm_clear_mod_reg_bits((1 << clkdm2->dep_bit),
 162                                     clkdm1->pwrdm.ptr->prcm_offs,
 163                                     OMAP3430_CM_SLEEPDEP);
 164         return 0;
 165 }
 166
 167 static int omap3xxx_clkdm_read_sleepdep(struct clockdomain *clkdm1,
 168                                         struct clockdomain *clkdm2)
 169 {
 170         return omap2_cm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs,
 171                                             OMAP3430_CM_SLEEPDEP,
 172                                             (1 << clkdm2->dep_bit));
 173 }
 174
 175 static int omap3xxx_clkdm_clear_all_sleepdeps(struct clockdomain *clkdm)
 176 {
 177         struct clkdm_dep *cd;
 178         u32 mask = 0;
 179
 180         for (cd = clkdm->sleepdep_srcs; cd && cd->clkdm_name; cd++) {
 181                 if (!cd->clkdm)
 182                         continue; /* only happens if data is erroneous */
 183
 184                 mask |= 1 << cd->clkdm->dep_bit;
 185                 cd->sleepdep_usecount = 0;
 186         }
 187         omap2_cm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs,
 188                                     OMAP3430_CM_SLEEPDEP);
 189         return 0;
 190 }
 191
 192 static int omap3xxx_clkdm_sleep(struct clockdomain *clkdm)
 193 {
 194         omap3xxx_cm_clkdm_force_sleep(clkdm->pwrdm.ptr->prcm_offs,
 195                                       clkdm->clktrctrl_mask);
 196         return 0;
 197 }
 198
 199 static int omap3xxx_clkdm_wakeup(struct clockdomain *clkdm)
 200 {
 201         omap3xxx_cm_clkdm_force_wakeup(clkdm->pwrdm.ptr->prcm_offs,
 202                                        clkdm->clktrctrl_mask);
 203         return 0;
 204 }
 205
 206 static void omap3xxx_clkdm_allow_idle(struct clockdomain *clkdm)
 207 {
 208         if (clkdm->usecount > 0)
 209                 clkdm_add_autodeps(clkdm);
 210
 211         omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 212                                        clkdm->clktrctrl_mask);
 213 }
 214
 215 static void omap3xxx_clkdm_deny_idle(struct clockdomain *clkdm)
 216 {
 217         omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 218                                         clkdm->clktrctrl_mask);
 219
 220         if (clkdm->usecount > 0)
 221                 clkdm_del_autodeps(clkdm);
 222 }
 223
 224 static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
 225 {
 226         bool hwsup = false;
 227
 228         if (!clkdm->clktrctrl_mask)
 229                 return 0;
 230
 231         /*
 232          * The CLKDM_MISSING_IDLE_REPORTING flag documentation has
 233          * more details on the unpleasant problem this is working
 234          * around
 235          */
 236         if ((clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) &&
 237             (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)) {
 238                 omap3xxx_clkdm_wakeup(clkdm);
 239                 return 0;
 240         }
 241
 242         hwsup = omap3xxx_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 243                                               clkdm->clktrctrl_mask);
 244
 245         if (hwsup) {
 246                 /* Disable HW transitions when we are changing deps */
 247                 omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 248                                                 clkdm->clktrctrl_mask);
 249                 clkdm_add_autodeps(clkdm);
 250                 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 251                                                clkdm->clktrctrl_mask);
 252         } else {
 253                 if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
 254                         omap3xxx_clkdm_wakeup(clkdm);
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
 261 {
 262         bool hwsup = false;
 263
 264         if (!clkdm->clktrctrl_mask)
 265                 return 0;
 266
 267         /*
 268          * The CLKDM_MISSING_IDLE_REPORTING flag documentation has
 269          * more details on the unpleasant problem this is working
 270          * around
 271          */
 272         if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING &&
 273             !(clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) {
 274                 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 275                                                clkdm->clktrctrl_mask);
 276                 return 0;
 277         }
 278
 279         hwsup = omap3xxx_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 280                                               clkdm->clktrctrl_mask);
 281
 282         if (hwsup) {
 283                 /* Disable HW transitions when we are changing deps */
 284                 omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 285                                                 clkdm->clktrctrl_mask);
 286                 clkdm_del_autodeps(clkdm);
 287                 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
 288                                                clkdm->clktrctrl_mask);
 289         } else {
 290                 if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
 291                         omap3xxx_clkdm_sleep(clkdm);
 292         }
 293
 294         return 0;
 295 }
 296
 297 struct clkdm_ops omap3_clkdm_operations = {
 298         .clkdm_add_wkdep        = omap2_clkdm_add_wkdep,
 299         .clkdm_del_wkdep        = omap2_clkdm_del_wkdep,
 300         .clkdm_read_wkdep       = omap2_clkdm_read_wkdep,
 301         .clkdm_clear_all_wkdeps = omap2_clkdm_clear_all_wkdeps,
 302         .clkdm_add_sleepdep     = omap3xxx_clkdm_add_sleepdep,
 303         .clkdm_del_sleepdep     = omap3xxx_clkdm_del_sleepdep,
 304         .clkdm_read_sleepdep    = omap3xxx_clkdm_read_sleepdep,
 305         .clkdm_clear_all_sleepdeps      = omap3xxx_clkdm_clear_all_sleepdeps,
 306         .clkdm_sleep            = omap3xxx_clkdm_sleep,
 307         .clkdm_wakeup           = omap3xxx_clkdm_wakeup,
 308         .clkdm_allow_idle       = omap3xxx_clkdm_allow_idle,
 309         .clkdm_deny_idle        = omap3xxx_clkdm_deny_idle,
 310         .clkdm_clk_enable       = omap3xxx_clkdm_clk_enable,
 311         .clkdm_clk_disable      = omap3xxx_clkdm_clk_disable,
 312 };
 313
 314 /*
 315  * Context save/restore code - OMAP3 only
 316  */
 317 struct omap3_cm_regs {
 318         u32 iva2_cm_clksel1;
 319         u32 iva2_cm_clksel2;
 320         u32 cm_sysconfig;
 321         u32 sgx_cm_clksel;
 322         u32 dss_cm_clksel;
 323         u32 cam_cm_clksel;
 324         u32 per_cm_clksel;
 325         u32 emu_cm_clksel;
 326         u32 emu_cm_clkstctrl;
 327         u32 pll_cm_autoidle;
 328         u32 pll_cm_autoidle2;
 329         u32 pll_cm_clksel4;
 330         u32 pll_cm_clksel5;
 331         u32 pll_cm_clken2;
 332         u32 cm_polctrl;
 333         u32 iva2_cm_fclken;
 334         u32 iva2_cm_clken_pll;
 335         u32 core_cm_fclken1;
 336         u32 core_cm_fclken3;
 337         u32 sgx_cm_fclken;
 338         u32 wkup_cm_fclken;
 339         u32 dss_cm_fclken;
 340         u32 cam_cm_fclken;
 341         u32 per_cm_fclken;
 342         u32 usbhost_cm_fclken;
 343         u32 core_cm_iclken1;
 344         u32 core_cm_iclken2;
 345         u32 core_cm_iclken3;
 346         u32 sgx_cm_iclken;
 347         u32 wkup_cm_iclken;
 348         u32 dss_cm_iclken;
 349         u32 cam_cm_iclken;
 350         u32 per_cm_iclken;
 351         u32 usbhost_cm_iclken;
 352         u32 iva2_cm_autoidle2;
 353         u32 mpu_cm_autoidle2;
 354         u32 iva2_cm_clkstctrl;
 355         u32 mpu_cm_clkstctrl;
 356         u32 core_cm_clkstctrl;
 357         u32 sgx_cm_clkstctrl;
 358         u32 dss_cm_clkstctrl;
 359         u32 cam_cm_clkstctrl;
 360         u32 per_cm_clkstctrl;
 361         u32 neon_cm_clkstctrl;
 362         u32 usbhost_cm_clkstctrl;
 363         u32 core_cm_autoidle1;
 364         u32 core_cm_autoidle2;
 365         u32 core_cm_autoidle3;
 366         u32 wkup_cm_autoidle;
 367         u32 dss_cm_autoidle;
 368         u32 cam_cm_autoidle;
 369         u32 per_cm_autoidle;
 370         u32 usbhost_cm_autoidle;
 371         u32 sgx_cm_sleepdep;
 372         u32 dss_cm_sleepdep;
 373         u32 cam_cm_sleepdep;
 374         u32 per_cm_sleepdep;
 375         u32 usbhost_cm_sleepdep;
 376         u32 cm_clkout_ctrl;
 377 };
 378
 379 static struct omap3_cm_regs cm_context;
 380
 381 void omap3_cm_save_context(void)
 382 {
 383         cm_context.iva2_cm_clksel1 =
 384                 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_CLKSEL1);
 385         cm_context.iva2_cm_clksel2 =
 386                 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_CLKSEL2);
 387         cm_context.cm_sysconfig =
 388                 omap2_cm_read_mod_reg(OCP_MOD, OMAP3430_CM_SYSCONFIG);
 389         cm_context.sgx_cm_clksel =
 390                 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_CLKSEL);
 391         cm_context.dss_cm_clksel =
 392                 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_CLKSEL);
 393         cm_context.cam_cm_clksel =
 394                 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_CLKSEL);
 395         cm_context.per_cm_clksel =
 396                 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_CLKSEL);
 397         cm_context.emu_cm_clksel =
 398                 omap2_cm_read_mod_reg(OMAP3430_EMU_MOD, CM_CLKSEL1);
 399         cm_context.emu_cm_clkstctrl =
 400                 omap2_cm_read_mod_reg(OMAP3430_EMU_MOD, OMAP2_CM_CLKSTCTRL);
 401         /*
 402          * As per erratum i671, ROM code does not respect the PER DPLL
 403          * programming scheme if CM_AUTOIDLE_PLL.AUTO_PERIPH_DPLL == 1.
 404          * In this case, even though this register has been saved in
 405          * scratchpad contents, we need to restore AUTO_PERIPH_DPLL
 406          * by ourselves. So, we need to save it anyway.
 407          */
 408         cm_context.pll_cm_autoidle =
 409                 omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE);
 410         cm_context.pll_cm_autoidle2 =
 411                 omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE2);
 412         cm_context.pll_cm_clksel4 =
 413                 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKSEL4);
 414         cm_context.pll_cm_clksel5 =
 415                 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKSEL5);
 416         cm_context.pll_cm_clken2 =
 417                 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKEN2);
 418         cm_context.cm_polctrl =
 419                 omap2_cm_read_mod_reg(OCP_MOD, OMAP3430_CM_POLCTRL);
 420         cm_context.iva2_cm_fclken =
 421                 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_FCLKEN);
 422         cm_context.iva2_cm_clken_pll =
 423                 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKEN_PLL);
 424         cm_context.core_cm_fclken1 =
 425                 omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
 426         cm_context.core_cm_fclken3 =
 427                 omap2_cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
 428         cm_context.sgx_cm_fclken =
 429                 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_FCLKEN);
 430         cm_context.wkup_cm_fclken =
 431                 omap2_cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
 432         cm_context.dss_cm_fclken =
 433                 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_FCLKEN);
 434         cm_context.cam_cm_fclken =
 435                 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_FCLKEN);
 436         cm_context.per_cm_fclken =
 437                 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
 438         cm_context.usbhost_cm_fclken =
 439                 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_FCLKEN);
 440         cm_context.core_cm_iclken1 =
 441                 omap2_cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
 442         cm_context.core_cm_iclken2 =
 443                 omap2_cm_read_mod_reg(CORE_MOD, CM_ICLKEN2);
 444         cm_context.core_cm_iclken3 =
 445                 omap2_cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
 446         cm_context.sgx_cm_iclken =
 447                 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_ICLKEN);
 448         cm_context.wkup_cm_iclken =
 449                 omap2_cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
 450         cm_context.dss_cm_iclken =
 451                 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_ICLKEN);
 452         cm_context.cam_cm_iclken =
 453                 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_ICLKEN);
 454         cm_context.per_cm_iclken =
 455                 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
 456         cm_context.usbhost_cm_iclken =
 457                 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_ICLKEN);
 458         cm_context.iva2_cm_autoidle2 =
 459                 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
 460         cm_context.mpu_cm_autoidle2 =
 461                 omap2_cm_read_mod_reg(MPU_MOD, CM_AUTOIDLE2);
 462         cm_context.iva2_cm_clkstctrl =
 463                 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP2_CM_CLKSTCTRL);
 464         cm_context.mpu_cm_clkstctrl =
 465                 omap2_cm_read_mod_reg(MPU_MOD, OMAP2_CM_CLKSTCTRL);
 466         cm_context.core_cm_clkstctrl =
 467                 omap2_cm_read_mod_reg(CORE_MOD, OMAP2_CM_CLKSTCTRL);
 468         cm_context.sgx_cm_clkstctrl =
 469                 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, OMAP2_CM_CLKSTCTRL);
 470         cm_context.dss_cm_clkstctrl =
 471                 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, OMAP2_CM_CLKSTCTRL);
 472         cm_context.cam_cm_clkstctrl =
 473                 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, OMAP2_CM_CLKSTCTRL);
 474         cm_context.per_cm_clkstctrl =
 475                 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, OMAP2_CM_CLKSTCTRL);
 476         cm_context.neon_cm_clkstctrl =
 477                 omap2_cm_read_mod_reg(OMAP3430_NEON_MOD, OMAP2_CM_CLKSTCTRL);
 478         cm_context.usbhost_cm_clkstctrl =
 479                 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 480                                       OMAP2_CM_CLKSTCTRL);
 481         cm_context.core_cm_autoidle1 =
 482                 omap2_cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE1);
 483         cm_context.core_cm_autoidle2 =
 484                 omap2_cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE2);
 485         cm_context.core_cm_autoidle3 =
 486                 omap2_cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE3);
 487         cm_context.wkup_cm_autoidle =
 488                 omap2_cm_read_mod_reg(WKUP_MOD, CM_AUTOIDLE);
 489         cm_context.dss_cm_autoidle =
 490                 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_AUTOIDLE);
 491         cm_context.cam_cm_autoidle =
 492                 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_AUTOIDLE);
 493         cm_context.per_cm_autoidle =
 494                 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
 495         cm_context.usbhost_cm_autoidle =
 496                 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
 497         cm_context.sgx_cm_sleepdep =
 498                 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD,
 499                                       OMAP3430_CM_SLEEPDEP);
 500         cm_context.dss_cm_sleepdep =
 501                 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, OMAP3430_CM_SLEEPDEP);
 502         cm_context.cam_cm_sleepdep =
 503                 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, OMAP3430_CM_SLEEPDEP);
 504         cm_context.per_cm_sleepdep =
 505                 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, OMAP3430_CM_SLEEPDEP);
 506         cm_context.usbhost_cm_sleepdep =
 507                 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 508                                       OMAP3430_CM_SLEEPDEP);
 509         cm_context.cm_clkout_ctrl =
 510                 omap2_cm_read_mod_reg(OMAP3430_CCR_MOD,
 511                                       OMAP3_CM_CLKOUT_CTRL_OFFSET);
 512 }
 513
 514 void omap3_cm_restore_context(void)
 515 {
 516         omap2_cm_write_mod_reg(cm_context.iva2_cm_clksel1, OMAP3430_IVA2_MOD,
 517                                CM_CLKSEL1);
 518         omap2_cm_write_mod_reg(cm_context.iva2_cm_clksel2, OMAP3430_IVA2_MOD,
 519                                CM_CLKSEL2);
 520         omap2_cm_write_mod_reg(cm_context.cm_sysconfig, OCP_MOD,
 521                                OMAP3430_CM_SYSCONFIG);
 522         omap2_cm_write_mod_reg(cm_context.sgx_cm_clksel, OMAP3430ES2_SGX_MOD,
 523                                CM_CLKSEL);
 524         omap2_cm_write_mod_reg(cm_context.dss_cm_clksel, OMAP3430_DSS_MOD,
 525                                CM_CLKSEL);
 526         omap2_cm_write_mod_reg(cm_context.cam_cm_clksel, OMAP3430_CAM_MOD,
 527                                CM_CLKSEL);
 528         omap2_cm_write_mod_reg(cm_context.per_cm_clksel, OMAP3430_PER_MOD,
 529                                CM_CLKSEL);
 530         omap2_cm_write_mod_reg(cm_context.emu_cm_clksel, OMAP3430_EMU_MOD,
 531                                CM_CLKSEL1);
 532         omap2_cm_write_mod_reg(cm_context.emu_cm_clkstctrl, OMAP3430_EMU_MOD,
 533                                OMAP2_CM_CLKSTCTRL);
 534         /*
 535          * As per erratum i671, ROM code does not respect the PER DPLL
 536          * programming scheme if CM_AUTOIDLE_PLL.AUTO_PERIPH_DPLL == 1.
 537          * In this case, we need to restore AUTO_PERIPH_DPLL by ourselves.
 538          */
 539         omap2_cm_write_mod_reg(cm_context.pll_cm_autoidle, PLL_MOD,
 540                                CM_AUTOIDLE);
 541         omap2_cm_write_mod_reg(cm_context.pll_cm_autoidle2, PLL_MOD,
 542                                CM_AUTOIDLE2);
 543         omap2_cm_write_mod_reg(cm_context.pll_cm_clksel4, PLL_MOD,
 544                                OMAP3430ES2_CM_CLKSEL4);
 545         omap2_cm_write_mod_reg(cm_context.pll_cm_clksel5, PLL_MOD,
 546                                OMAP3430ES2_CM_CLKSEL5);
 547         omap2_cm_write_mod_reg(cm_context.pll_cm_clken2, PLL_MOD,
 548                                OMAP3430ES2_CM_CLKEN2);
 549         omap2_cm_write_mod_reg(cm_context.cm_polctrl, OCP_MOD,
 550                                OMAP3430_CM_POLCTRL);
 551         omap2_cm_write_mod_reg(cm_context.iva2_cm_fclken, OMAP3430_IVA2_MOD,
 552                                CM_FCLKEN);
 553         omap2_cm_write_mod_reg(cm_context.iva2_cm_clken_pll, OMAP3430_IVA2_MOD,
 554                                OMAP3430_CM_CLKEN_PLL);
 555         omap2_cm_write_mod_reg(cm_context.core_cm_fclken1, CORE_MOD,
 556                                CM_FCLKEN1);
 557         omap2_cm_write_mod_reg(cm_context.core_cm_fclken3, CORE_MOD,
 558                                OMAP3430ES2_CM_FCLKEN3);
 559         omap2_cm_write_mod_reg(cm_context.sgx_cm_fclken, OMAP3430ES2_SGX_MOD,
 560                                CM_FCLKEN);
 561         omap2_cm_write_mod_reg(cm_context.wkup_cm_fclken, WKUP_MOD, CM_FCLKEN);
 562         omap2_cm_write_mod_reg(cm_context.dss_cm_fclken, OMAP3430_DSS_MOD,
 563                                CM_FCLKEN);
 564         omap2_cm_write_mod_reg(cm_context.cam_cm_fclken, OMAP3430_CAM_MOD,
 565                                CM_FCLKEN);
 566         omap2_cm_write_mod_reg(cm_context.per_cm_fclken, OMAP3430_PER_MOD,
 567                                CM_FCLKEN);
 568         omap2_cm_write_mod_reg(cm_context.usbhost_cm_fclken,
 569                                OMAP3430ES2_USBHOST_MOD, CM_FCLKEN);
 570         omap2_cm_write_mod_reg(cm_context.core_cm_iclken1, CORE_MOD,
 571                                CM_ICLKEN1);
 572         omap2_cm_write_mod_reg(cm_context.core_cm_iclken2, CORE_MOD,
 573                                CM_ICLKEN2);
 574         omap2_cm_write_mod_reg(cm_context.core_cm_iclken3, CORE_MOD,
 575                                CM_ICLKEN3);
 576         omap2_cm_write_mod_reg(cm_context.sgx_cm_iclken, OMAP3430ES2_SGX_MOD,
 577                                CM_ICLKEN);
 578         omap2_cm_write_mod_reg(cm_context.wkup_cm_iclken, WKUP_MOD, CM_ICLKEN);
 579         omap2_cm_write_mod_reg(cm_context.dss_cm_iclken, OMAP3430_DSS_MOD,
 580                                CM_ICLKEN);
 581         omap2_cm_write_mod_reg(cm_context.cam_cm_iclken, OMAP3430_CAM_MOD,
 582                                CM_ICLKEN);
 583         omap2_cm_write_mod_reg(cm_context.per_cm_iclken, OMAP3430_PER_MOD,
 584                                CM_ICLKEN);
 585         omap2_cm_write_mod_reg(cm_context.usbhost_cm_iclken,
 586                                OMAP3430ES2_USBHOST_MOD, CM_ICLKEN);
 587         omap2_cm_write_mod_reg(cm_context.iva2_cm_autoidle2, OMAP3430_IVA2_MOD,
 588                                CM_AUTOIDLE2);
 589         omap2_cm_write_mod_reg(cm_context.mpu_cm_autoidle2, MPU_MOD,
 590                                CM_AUTOIDLE2);
 591         omap2_cm_write_mod_reg(cm_context.iva2_cm_clkstctrl, OMAP3430_IVA2_MOD,
 592                                OMAP2_CM_CLKSTCTRL);
 593         omap2_cm_write_mod_reg(cm_context.mpu_cm_clkstctrl, MPU_MOD,
 594                                OMAP2_CM_CLKSTCTRL);
 595         omap2_cm_write_mod_reg(cm_context.core_cm_clkstctrl, CORE_MOD,
 596                                OMAP2_CM_CLKSTCTRL);
 597         omap2_cm_write_mod_reg(cm_context.sgx_cm_clkstctrl, OMAP3430ES2_SGX_MOD,
 598                                OMAP2_CM_CLKSTCTRL);
 599         omap2_cm_write_mod_reg(cm_context.dss_cm_clkstctrl, OMAP3430_DSS_MOD,
 600                                OMAP2_CM_CLKSTCTRL);
 601         omap2_cm_write_mod_reg(cm_context.cam_cm_clkstctrl, OMAP3430_CAM_MOD,
 602                                OMAP2_CM_CLKSTCTRL);
 603         omap2_cm_write_mod_reg(cm_context.per_cm_clkstctrl, OMAP3430_PER_MOD,
 604                                OMAP2_CM_CLKSTCTRL);
 605         omap2_cm_write_mod_reg(cm_context.neon_cm_clkstctrl, OMAP3430_NEON_MOD,
 606                                OMAP2_CM_CLKSTCTRL);
 607         omap2_cm_write_mod_reg(cm_context.usbhost_cm_clkstctrl,
 608                                OMAP3430ES2_USBHOST_MOD, OMAP2_CM_CLKSTCTRL);
 609         omap2_cm_write_mod_reg(cm_context.core_cm_autoidle1, CORE_MOD,
 610                                CM_AUTOIDLE1);
 611         omap2_cm_write_mod_reg(cm_context.core_cm_autoidle2, CORE_MOD,
 612                                CM_AUTOIDLE2);
 613         omap2_cm_write_mod_reg(cm_context.core_cm_autoidle3, CORE_MOD,
 614                                CM_AUTOIDLE3);
 615         omap2_cm_write_mod_reg(cm_context.wkup_cm_autoidle, WKUP_MOD,
 616                                CM_AUTOIDLE);
 617         omap2_cm_write_mod_reg(cm_context.dss_cm_autoidle, OMAP3430_DSS_MOD,
 618                                CM_AUTOIDLE);
 619         omap2_cm_write_mod_reg(cm_context.cam_cm_autoidle, OMAP3430_CAM_MOD,
 620                                CM_AUTOIDLE);
 621         omap2_cm_write_mod_reg(cm_context.per_cm_autoidle, OMAP3430_PER_MOD,
 622                                CM_AUTOIDLE);
 623         omap2_cm_write_mod_reg(cm_context.usbhost_cm_autoidle,
 624                                OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
 625         omap2_cm_write_mod_reg(cm_context.sgx_cm_sleepdep, OMAP3430ES2_SGX_MOD,
 626                                OMAP3430_CM_SLEEPDEP);
 627         omap2_cm_write_mod_reg(cm_context.dss_cm_sleepdep, OMAP3430_DSS_MOD,
 628                                OMAP3430_CM_SLEEPDEP);
 629         omap2_cm_write_mod_reg(cm_context.cam_cm_sleepdep, OMAP3430_CAM_MOD,
 630                                OMAP3430_CM_SLEEPDEP);
 631         omap2_cm_write_mod_reg(cm_context.per_cm_sleepdep, OMAP3430_PER_MOD,
 632                                OMAP3430_CM_SLEEPDEP);
 633         omap2_cm_write_mod_reg(cm_context.usbhost_cm_sleepdep,
 634                                OMAP3430ES2_USBHOST_MOD, OMAP3430_CM_SLEEPDEP);
 635         omap2_cm_write_mod_reg(cm_context.cm_clkout_ctrl, OMAP3430_CCR_MOD,
 636                                OMAP3_CM_CLKOUT_CTRL_OFFSET);
 637 }
 638
 639 void omap3_cm_save_scratchpad_contents(u32 *ptr)
 640 {
 641         *ptr++ = omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
 642         *ptr++ = omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
 643         *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
 644
 645         /*
 646          * As per erratum i671, ROM code does not respect the PER DPLL
 647          * programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1.
 648          * Then,  in any case, clear these bits to avoid extra latencies.
 649          */
 650         *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE) &
 651                 ~OMAP3430_AUTO_PERIPH_DPLL_MASK;
 652         *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL);
 653         *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL);
 654         *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3);
 655         *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL);
 656         *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL);
 657         *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL);
 658         *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL);
 659 }
 660
 661 /*
 662  *
 663  */
 664
 665 static const struct cm_ll_data omap3xxx_cm_ll_data = {
 666         .split_idlest_reg       = &omap3xxx_cm_split_idlest_reg,
 667         .wait_module_ready      = &omap3xxx_cm_wait_module_ready,
 668 };
 669
 670 int __init omap3xxx_cm_init(const struct omap_prcm_init_data *data)
 671 {
 672         omap2_clk_legacy_provider_init(TI_CLKM_CM, cm_base.va +
 673                                        OMAP3430_IVA2_MOD);
 674         return cm_register(&omap3xxx_cm_ll_data);
 675 }
 676
 677 static void __exit omap3xxx_cm_exit(void)
 678 {
 679         cm_unregister(&omap3xxx_cm_ll_data);
 680 }
 681 __exitcall(omap3xxx_cm_exit);