1 /* 2 * OMAP2/3 System Control Module register access 3 * 4 * Copyright (C) 2007, 2012 Texas Instruments, Inc. 5 * Copyright (C) 2007 Nokia Corporation 6 * 7 * Written by Paul Walmsley 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 #undef DEBUG 14 15 #include <linux/kernel.h> 16 #include <linux/io.h> 17 #include <linux/of_address.h> 18 #include <linux/regmap.h> 19 #include <linux/mfd/syscon.h> 20 21 #include "soc.h" 22 #include "iomap.h" 23 #include "common.h" 24 #include "cm-regbits-34xx.h" 25 #include "prm-regbits-34xx.h" 26 #include "prm3xxx.h" 27 #include "cm3xxx.h" 28 #include "sdrc.h" 29 #include "pm.h" 30 #include "control.h" 31 #include "clock.h" 32 33 /* Used by omap3_ctrl_save_padconf() */ 34 #define START_PADCONF_SAVE 0x2 35 #define PADCONF_SAVE_DONE 0x1 36 37 static void __iomem *omap2_ctrl_base; 38 static s16 omap2_ctrl_offset; 39 static struct regmap *omap2_ctrl_syscon; 40 41 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) 42 struct omap3_scratchpad { 43 u32 boot_config_ptr; 44 u32 public_restore_ptr; 45 u32 secure_ram_restore_ptr; 46 u32 sdrc_module_semaphore; 47 u32 prcm_block_offset; 48 u32 sdrc_block_offset; 49 }; 50 51 struct omap3_scratchpad_prcm_block { 52 u32 prm_contents[2]; 53 u32 cm_contents[11]; 54 u32 prcm_block_size; 55 }; 56 57 struct omap3_scratchpad_sdrc_block { 58 u16 sysconfig; 59 u16 cs_cfg; 60 u16 sharing; 61 u16 err_type; 62 u32 dll_a_ctrl; 63 u32 dll_b_ctrl; 64 u32 power; 65 u32 cs_0; 66 u32 mcfg_0; 67 u16 mr_0; 68 u16 emr_1_0; 69 u16 emr_2_0; 70 u16 emr_3_0; 71 u32 actim_ctrla_0; 72 u32 actim_ctrlb_0; 73 u32 rfr_ctrl_0; 74 u32 cs_1; 75 u32 mcfg_1; 76 u16 mr_1; 77 u16 emr_1_1; 78 u16 emr_2_1; 79 u16 emr_3_1; 80 u32 actim_ctrla_1; 81 u32 actim_ctrlb_1; 82 u32 rfr_ctrl_1; 83 u16 dcdl_1_ctrl; 84 u16 dcdl_2_ctrl; 85 u32 flags; 86 u32 block_size; 87 }; 88 89 void *omap3_secure_ram_storage; 90 91 /* 92 * This is used to store ARM registers in SDRAM before attempting 93 * an MPU OFF. The save and restore happens from the SRAM sleep code. 94 * The address is stored in scratchpad, so that it can be used 95 * during the restore path. 96 */ 97 u32 omap3_arm_context[128]; 98 99 struct omap3_control_regs { 100 u32 sysconfig; 101 u32 devconf0; 102 u32 mem_dftrw0; 103 u32 mem_dftrw1; 104 u32 msuspendmux_0; 105 u32 msuspendmux_1; 106 u32 msuspendmux_2; 107 u32 msuspendmux_3; 108 u32 msuspendmux_4; 109 u32 msuspendmux_5; 110 u32 sec_ctrl; 111 u32 devconf1; 112 u32 csirxfe; 113 u32 iva2_bootaddr; 114 u32 iva2_bootmod; 115 u32 wkup_ctrl; 116 u32 debobs_0; 117 u32 debobs_1; 118 u32 debobs_2; 119 u32 debobs_3; 120 u32 debobs_4; 121 u32 debobs_5; 122 u32 debobs_6; 123 u32 debobs_7; 124 u32 debobs_8; 125 u32 prog_io0; 126 u32 prog_io1; 127 u32 dss_dpll_spreading; 128 u32 core_dpll_spreading; 129 u32 per_dpll_spreading; 130 u32 usbhost_dpll_spreading; 131 u32 pbias_lite; 132 u32 temp_sensor; 133 u32 sramldo4; 134 u32 sramldo5; 135 u32 csi; 136 u32 padconf_sys_nirq; 137 }; 138 139 static struct omap3_control_regs control_context; 140 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ 141 142 void __init omap2_set_globals_control(void __iomem *ctrl) 143 { 144 omap2_ctrl_base = ctrl; 145 } 146 147 u8 omap_ctrl_readb(u16 offset) 148 { 149 u32 val; 150 u8 byte_offset = offset & 0x3; 151 152 val = omap_ctrl_readl(offset); 153 154 return (val >> (byte_offset * 8)) & 0xff; 155 } 156 157 u16 omap_ctrl_readw(u16 offset) 158 { 159 u32 val; 160 u16 byte_offset = offset & 0x2; 161 162 val = omap_ctrl_readl(offset); 163 164 return (val >> (byte_offset * 8)) & 0xffff; 165 } 166 167 u32 omap_ctrl_readl(u16 offset) 168 { 169 u32 val; 170 171 offset &= 0xfffc; 172 if (!omap2_ctrl_syscon) 173 val = readl_relaxed(omap2_ctrl_base + offset); 174 else 175 regmap_read(omap2_ctrl_syscon, omap2_ctrl_offset + offset, 176 &val); 177 178 return val; 179 } 180 181 void omap_ctrl_writeb(u8 val, u16 offset) 182 { 183 u32 tmp; 184 u8 byte_offset = offset & 0x3; 185 186 tmp = omap_ctrl_readl(offset); 187 188 tmp &= 0xffffffff ^ (0xff << (byte_offset * 8)); 189 tmp |= val << (byte_offset * 8); 190 191 omap_ctrl_writel(tmp, offset); 192 } 193 194 void omap_ctrl_writew(u16 val, u16 offset) 195 { 196 u32 tmp; 197 u8 byte_offset = offset & 0x2; 198 199 tmp = omap_ctrl_readl(offset); 200 201 tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8)); 202 tmp |= val << (byte_offset * 8); 203 204 omap_ctrl_writel(tmp, offset); 205 } 206 207 void omap_ctrl_writel(u32 val, u16 offset) 208 { 209 offset &= 0xfffc; 210 if (!omap2_ctrl_syscon) 211 writel_relaxed(val, omap2_ctrl_base + offset); 212 else 213 regmap_write(omap2_ctrl_syscon, omap2_ctrl_offset + offset, 214 val); 215 } 216 217 #ifdef CONFIG_ARCH_OMAP3 218 219 /** 220 * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot 221 * @bootmode: 8-bit value to pass to some boot code 222 * 223 * Set the bootmode in the scratchpad RAM. This is used after the 224 * system restarts. Not sure what actually uses this - it may be the 225 * bootloader, rather than the boot ROM - contrary to the preserved 226 * comment below. No return value. 227 */ 228 void omap3_ctrl_write_boot_mode(u8 bootmode) 229 { 230 u32 l; 231 232 l = ('B' << 24) | ('M' << 16) | bootmode; 233 234 /* 235 * Reserve the first word in scratchpad for communicating 236 * with the boot ROM. A pointer to a data structure 237 * describing the boot process can be stored there, 238 * cf. OMAP34xx TRM, Initialization / Software Booting 239 * Configuration. 240 * 241 * XXX This should use some omap_ctrl_writel()-type function 242 */ 243 writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4)); 244 } 245 246 #endif 247 248 /** 249 * omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor 250 * @bootaddr: physical address of the boot loader 251 * 252 * Set boot address for the boot loader of a supported processor 253 * when a power ON sequence occurs. 254 */ 255 void omap_ctrl_write_dsp_boot_addr(u32 bootaddr) 256 { 257 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR : 258 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR : 259 cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR : 260 soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR : 261 0; 262 263 if (!offset) { 264 pr_err("%s: unsupported omap type\n", __func__); 265 return; 266 } 267 268 omap_ctrl_writel(bootaddr, offset); 269 } 270 271 /** 272 * omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor 273 * @bootmode: 8-bit value to pass to some boot code 274 * 275 * Sets boot mode for the boot loader of a supported processor 276 * when a power ON sequence occurs. 277 */ 278 void omap_ctrl_write_dsp_boot_mode(u8 bootmode) 279 { 280 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD : 281 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD : 282 0; 283 284 if (!offset) { 285 pr_err("%s: unsupported omap type\n", __func__); 286 return; 287 } 288 289 omap_ctrl_writel(bootmode, offset); 290 } 291 292 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) 293 /* 294 * Clears the scratchpad contents in case of cold boot- 295 * called during bootup 296 */ 297 void omap3_clear_scratchpad_contents(void) 298 { 299 u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET; 300 void __iomem *v_addr; 301 u32 offset = 0; 302 303 v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM); 304 if (omap3xxx_prm_clear_global_cold_reset()) { 305 for ( ; offset <= max_offset; offset += 0x4) 306 writel_relaxed(0x0, (v_addr + offset)); 307 } 308 } 309 310 /* Populate the scratchpad structure with restore structure */ 311 void omap3_save_scratchpad_contents(void) 312 { 313 void __iomem *scratchpad_address; 314 u32 arm_context_addr; 315 struct omap3_scratchpad scratchpad_contents; 316 struct omap3_scratchpad_prcm_block prcm_block_contents; 317 struct omap3_scratchpad_sdrc_block sdrc_block_contents; 318 319 /* 320 * Populate the Scratchpad contents 321 * 322 * The "get_*restore_pointer" functions are used to provide a 323 * physical restore address where the ROM code jumps while waking 324 * up from MPU OFF/OSWR state. 325 * The restore pointer is stored into the scratchpad. 326 */ 327 scratchpad_contents.boot_config_ptr = 0x0; 328 if (cpu_is_omap3630()) 329 scratchpad_contents.public_restore_ptr = 330 virt_to_phys(omap3_restore_3630); 331 else if (omap_rev() != OMAP3430_REV_ES3_0 && 332 omap_rev() != OMAP3430_REV_ES3_1 && 333 omap_rev() != OMAP3430_REV_ES3_1_2) 334 scratchpad_contents.public_restore_ptr = 335 virt_to_phys(omap3_restore); 336 else 337 scratchpad_contents.public_restore_ptr = 338 virt_to_phys(omap3_restore_es3); 339 340 if (omap_type() == OMAP2_DEVICE_TYPE_GP) 341 scratchpad_contents.secure_ram_restore_ptr = 0x0; 342 else 343 scratchpad_contents.secure_ram_restore_ptr = 344 (u32) __pa(omap3_secure_ram_storage); 345 scratchpad_contents.sdrc_module_semaphore = 0x0; 346 scratchpad_contents.prcm_block_offset = 0x2C; 347 scratchpad_contents.sdrc_block_offset = 0x64; 348 349 /* Populate the PRCM block contents */ 350 omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents); 351 omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents); 352 353 prcm_block_contents.prcm_block_size = 0x0; 354 355 /* Populate the SDRC block contents */ 356 sdrc_block_contents.sysconfig = 357 (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF); 358 sdrc_block_contents.cs_cfg = 359 (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF); 360 sdrc_block_contents.sharing = 361 (sdrc_read_reg(SDRC_SHARING) & 0xFFFF); 362 sdrc_block_contents.err_type = 363 (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF); 364 sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL); 365 sdrc_block_contents.dll_b_ctrl = 0x0; 366 /* 367 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should 368 * be programed to issue automatic self refresh on timeout 369 * of AUTO_CNT = 1 prior to any transition to OFF mode. 370 */ 371 if ((omap_type() != OMAP2_DEVICE_TYPE_GP) 372 && (omap_rev() >= OMAP3430_REV_ES3_0)) 373 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) & 374 ~(SDRC_POWER_AUTOCOUNT_MASK| 375 SDRC_POWER_CLKCTRL_MASK)) | 376 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) | 377 SDRC_SELF_REFRESH_ON_AUTOCOUNT; 378 else 379 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER); 380 381 sdrc_block_contents.cs_0 = 0x0; 382 sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0); 383 sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF); 384 sdrc_block_contents.emr_1_0 = 0x0; 385 sdrc_block_contents.emr_2_0 = 0x0; 386 sdrc_block_contents.emr_3_0 = 0x0; 387 sdrc_block_contents.actim_ctrla_0 = 388 sdrc_read_reg(SDRC_ACTIM_CTRL_A_0); 389 sdrc_block_contents.actim_ctrlb_0 = 390 sdrc_read_reg(SDRC_ACTIM_CTRL_B_0); 391 sdrc_block_contents.rfr_ctrl_0 = 392 sdrc_read_reg(SDRC_RFR_CTRL_0); 393 sdrc_block_contents.cs_1 = 0x0; 394 sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1); 395 sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF; 396 sdrc_block_contents.emr_1_1 = 0x0; 397 sdrc_block_contents.emr_2_1 = 0x0; 398 sdrc_block_contents.emr_3_1 = 0x0; 399 sdrc_block_contents.actim_ctrla_1 = 400 sdrc_read_reg(SDRC_ACTIM_CTRL_A_1); 401 sdrc_block_contents.actim_ctrlb_1 = 402 sdrc_read_reg(SDRC_ACTIM_CTRL_B_1); 403 sdrc_block_contents.rfr_ctrl_1 = 404 sdrc_read_reg(SDRC_RFR_CTRL_1); 405 sdrc_block_contents.dcdl_1_ctrl = 0x0; 406 sdrc_block_contents.dcdl_2_ctrl = 0x0; 407 sdrc_block_contents.flags = 0x0; 408 sdrc_block_contents.block_size = 0x0; 409 410 arm_context_addr = virt_to_phys(omap3_arm_context); 411 412 /* Copy all the contents to the scratchpad location */ 413 scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD); 414 memcpy_toio(scratchpad_address, &scratchpad_contents, 415 sizeof(scratchpad_contents)); 416 /* Scratchpad contents being 32 bits, a divide by 4 done here */ 417 memcpy_toio(scratchpad_address + 418 scratchpad_contents.prcm_block_offset, 419 &prcm_block_contents, sizeof(prcm_block_contents)); 420 memcpy_toio(scratchpad_address + 421 scratchpad_contents.sdrc_block_offset, 422 &sdrc_block_contents, sizeof(sdrc_block_contents)); 423 /* 424 * Copies the address of the location in SDRAM where ARM 425 * registers get saved during a MPU OFF transition. 426 */ 427 memcpy_toio(scratchpad_address + 428 scratchpad_contents.sdrc_block_offset + 429 sizeof(sdrc_block_contents), &arm_context_addr, 4); 430 } 431 432 void omap3_control_save_context(void) 433 { 434 control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG); 435 control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); 436 control_context.mem_dftrw0 = 437 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0); 438 control_context.mem_dftrw1 = 439 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1); 440 control_context.msuspendmux_0 = 441 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0); 442 control_context.msuspendmux_1 = 443 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1); 444 control_context.msuspendmux_2 = 445 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2); 446 control_context.msuspendmux_3 = 447 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3); 448 control_context.msuspendmux_4 = 449 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4); 450 control_context.msuspendmux_5 = 451 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5); 452 control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL); 453 control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1); 454 control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE); 455 control_context.iva2_bootaddr = 456 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR); 457 control_context.iva2_bootmod = 458 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD); 459 control_context.wkup_ctrl = omap_ctrl_readl(OMAP34XX_CONTROL_WKUP_CTRL); 460 control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0)); 461 control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1)); 462 control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2)); 463 control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3)); 464 control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4)); 465 control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5)); 466 control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6)); 467 control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7)); 468 control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8)); 469 control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0); 470 control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1); 471 control_context.dss_dpll_spreading = 472 omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING); 473 control_context.core_dpll_spreading = 474 omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING); 475 control_context.per_dpll_spreading = 476 omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING); 477 control_context.usbhost_dpll_spreading = 478 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING); 479 control_context.pbias_lite = 480 omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE); 481 control_context.temp_sensor = 482 omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR); 483 control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4); 484 control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5); 485 control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI); 486 control_context.padconf_sys_nirq = 487 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ); 488 } 489 490 void omap3_control_restore_context(void) 491 { 492 omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG); 493 omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0); 494 omap_ctrl_writel(control_context.mem_dftrw0, 495 OMAP343X_CONTROL_MEM_DFTRW0); 496 omap_ctrl_writel(control_context.mem_dftrw1, 497 OMAP343X_CONTROL_MEM_DFTRW1); 498 omap_ctrl_writel(control_context.msuspendmux_0, 499 OMAP2_CONTROL_MSUSPENDMUX_0); 500 omap_ctrl_writel(control_context.msuspendmux_1, 501 OMAP2_CONTROL_MSUSPENDMUX_1); 502 omap_ctrl_writel(control_context.msuspendmux_2, 503 OMAP2_CONTROL_MSUSPENDMUX_2); 504 omap_ctrl_writel(control_context.msuspendmux_3, 505 OMAP2_CONTROL_MSUSPENDMUX_3); 506 omap_ctrl_writel(control_context.msuspendmux_4, 507 OMAP2_CONTROL_MSUSPENDMUX_4); 508 omap_ctrl_writel(control_context.msuspendmux_5, 509 OMAP2_CONTROL_MSUSPENDMUX_5); 510 omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL); 511 omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1); 512 omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE); 513 omap_ctrl_writel(control_context.iva2_bootaddr, 514 OMAP343X_CONTROL_IVA2_BOOTADDR); 515 omap_ctrl_writel(control_context.iva2_bootmod, 516 OMAP343X_CONTROL_IVA2_BOOTMOD); 517 omap_ctrl_writel(control_context.wkup_ctrl, OMAP34XX_CONTROL_WKUP_CTRL); 518 omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0)); 519 omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1)); 520 omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2)); 521 omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3)); 522 omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4)); 523 omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5)); 524 omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6)); 525 omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7)); 526 omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8)); 527 omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0); 528 omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1); 529 omap_ctrl_writel(control_context.dss_dpll_spreading, 530 OMAP343X_CONTROL_DSS_DPLL_SPREADING); 531 omap_ctrl_writel(control_context.core_dpll_spreading, 532 OMAP343X_CONTROL_CORE_DPLL_SPREADING); 533 omap_ctrl_writel(control_context.per_dpll_spreading, 534 OMAP343X_CONTROL_PER_DPLL_SPREADING); 535 omap_ctrl_writel(control_context.usbhost_dpll_spreading, 536 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING); 537 omap_ctrl_writel(control_context.pbias_lite, 538 OMAP343X_CONTROL_PBIAS_LITE); 539 omap_ctrl_writel(control_context.temp_sensor, 540 OMAP343X_CONTROL_TEMP_SENSOR); 541 omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4); 542 omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5); 543 omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI); 544 omap_ctrl_writel(control_context.padconf_sys_nirq, 545 OMAP343X_CONTROL_PADCONF_SYSNIRQ); 546 } 547 548 void omap3630_ctrl_disable_rta(void) 549 { 550 if (!cpu_is_omap3630()) 551 return; 552 omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL); 553 } 554 555 /** 556 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM 557 * 558 * Tell the SCM to start saving the padconf registers, then wait for 559 * the process to complete. Returns 0 unconditionally, although it 560 * should also eventually be able to return -ETIMEDOUT, if the save 561 * does not complete. 562 * 563 * XXX This function is missing a timeout. What should it be? 564 */ 565 int omap3_ctrl_save_padconf(void) 566 { 567 u32 cpo; 568 569 /* Save the padconf registers */ 570 cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF); 571 cpo |= START_PADCONF_SAVE; 572 omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF); 573 574 /* wait for the save to complete */ 575 while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS) 576 & PADCONF_SAVE_DONE)) 577 udelay(1); 578 579 return 0; 580 } 581 582 /** 583 * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle 584 * 585 * Sets the bootmode for IVA2 to idle. This is needed by the PM code to 586 * force disable IVA2 so that it does not prevent any low-power states. 587 */ 588 static void __init omap3_ctrl_set_iva_bootmode_idle(void) 589 { 590 omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE, 591 OMAP343X_CONTROL_IVA2_BOOTMOD); 592 } 593 594 /** 595 * omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle 596 * 597 * Sets up the pads controlling the stacked modem in such way that the 598 * device can enter idle. 599 */ 600 static void __init omap3_ctrl_setup_d2d_padconf(void) 601 { 602 u16 mask, padconf; 603 604 /* 605 * In a stand alone OMAP3430 where there is not a stacked 606 * modem for the D2D Idle Ack and D2D MStandby must be pulled 607 * high. S CONTROL_PADCONF_SAD2D_IDLEACK and 608 * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up. 609 */ 610 mask = (1 << 4) | (1 << 3); /* pull-up, enabled */ 611 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY); 612 padconf |= mask; 613 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY); 614 615 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK); 616 padconf |= mask; 617 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK); 618 } 619 620 /** 621 * omap3_ctrl_init - does static initializations for control module 622 * 623 * Initializes system control module. This sets up the sysconfig autoidle, 624 * and sets up modem and iva2 so that they can be idled properly. 625 */ 626 void __init omap3_ctrl_init(void) 627 { 628 omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG); 629 630 omap3_ctrl_set_iva_bootmode_idle(); 631 632 omap3_ctrl_setup_d2d_padconf(); 633 } 634 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ 635 636 struct control_init_data { 637 int index; 638 s16 offset; 639 }; 640 641 static struct control_init_data ctrl_data = { 642 .index = TI_CLKM_CTRL, 643 }; 644 645 static const struct control_init_data omap2_ctrl_data = { 646 .index = TI_CLKM_CTRL, 647 .offset = -OMAP2_CONTROL_GENERAL, 648 }; 649 650 static const struct of_device_id omap_scrm_dt_match_table[] = { 651 { .compatible = "ti,am3-scm", .data = &ctrl_data }, 652 { .compatible = "ti,am4-scm", .data = &ctrl_data }, 653 { .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data }, 654 { .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data }, 655 { .compatible = "ti,dm814-scm", .data = &ctrl_data }, 656 { .compatible = "ti,dm816-scrm", .data = &ctrl_data }, 657 { .compatible = "ti,omap4-scm-core", .data = &ctrl_data }, 658 { .compatible = "ti,omap5-scm-core", .data = &ctrl_data }, 659 { .compatible = "ti,dra7-scm-core", .data = &ctrl_data }, 660 { } 661 }; 662 663 /** 664 * omap2_control_base_init - initialize iomappings for the control driver 665 * 666 * Detects and initializes the iomappings for the control driver, based 667 * on the DT data. Returns 0 in success, negative error value 668 * otherwise. 669 */ 670 int __init omap2_control_base_init(void) 671 { 672 struct device_node *np; 673 const struct of_device_id *match; 674 struct control_init_data *data; 675 676 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) { 677 data = (struct control_init_data *)match->data; 678 679 omap2_ctrl_base = of_iomap(np, 0); 680 if (!omap2_ctrl_base) 681 return -ENOMEM; 682 683 omap2_ctrl_offset = data->offset; 684 } 685 686 return 0; 687 } 688 689 /** 690 * omap_control_init - low level init for the control driver 691 * 692 * Initializes the low level clock infrastructure for control driver. 693 * Returns 0 in success, negative error value in failure. 694 */ 695 int __init omap_control_init(void) 696 { 697 struct device_node *np, *scm_conf; 698 const struct of_device_id *match; 699 const struct omap_prcm_init_data *data; 700 int ret; 701 struct regmap *syscon; 702 703 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) { 704 data = match->data; 705 706 /* 707 * Check if we have scm_conf node, if yes, use this to 708 * access clock registers. 709 */ 710 scm_conf = of_get_child_by_name(np, "scm_conf"); 711 712 if (scm_conf) { 713 syscon = syscon_node_to_regmap(scm_conf); 714 715 if (IS_ERR(syscon)) 716 return PTR_ERR(syscon); 717 718 omap2_ctrl_syscon = syscon; 719 720 if (of_get_child_by_name(scm_conf, "clocks")) { 721 ret = omap2_clk_provider_init(scm_conf, 722 data->index, 723 syscon, NULL); 724 if (ret) 725 return ret; 726 } 727 728 iounmap(omap2_ctrl_base); 729 omap2_ctrl_base = NULL; 730 } else { 731 /* No scm_conf found, direct access */ 732 ret = omap2_clk_provider_init(np, data->index, NULL, 733 omap2_ctrl_base); 734 if (ret) 735 return ret; 736 } 737 } 738 739 return 0; 740 } 741 742 /** 743 * omap3_control_legacy_iomap_init - legacy iomap init for clock providers 744 * 745 * Legacy iomap init for clock provider. Needed only by legacy boot mode, 746 * where the base addresses are not parsed from DT, but still required 747 * by the clock driver to be setup properly. 748 */ 749 void __init omap3_control_legacy_iomap_init(void) 750 { 751 omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base); 752 } 753