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