1 /* 2 * linux/arch/arm/mach-omap1/pm.c 3 * 4 * OMAP Power Management Routines 5 * 6 * Original code for the SA11x0: 7 * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com> 8 * 9 * Modified for the PXA250 by Nicolas Pitre: 10 * Copyright (c) 2002 Monta Vista Software, Inc. 11 * 12 * Modified for the OMAP1510 by David Singleton: 13 * Copyright (c) 2002 Monta Vista Software, Inc. 14 * 15 * Cleanup 2004 for OMAP1510/1610 by Dirk Behme <dirk.behme@de.bosch.com> 16 * 17 * This program is free software; you can redistribute it and/or modify it 18 * under the terms of the GNU General Public License as published by the 19 * Free Software Foundation; either version 2 of the License, or (at your 20 * option) any later version. 21 * 22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 25 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * You should have received a copy of the GNU General Public License along 34 * with this program; if not, write to the Free Software Foundation, Inc., 35 * 675 Mass Ave, Cambridge, MA 02139, USA. 36 */ 37 38 #include <linux/suspend.h> 39 #include <linux/sched.h> 40 #include <linux/debugfs.h> 41 #include <linux/seq_file.h> 42 #include <linux/interrupt.h> 43 #include <linux/sysfs.h> 44 #include <linux/module.h> 45 #include <linux/io.h> 46 #include <linux/atomic.h> 47 #include <linux/cpu.h> 48 49 #include <asm/fncpy.h> 50 #include <asm/system_misc.h> 51 #include <asm/irq.h> 52 #include <asm/mach/time.h> 53 #include <asm/mach/irq.h> 54 55 #include <mach/tc.h> 56 #include <mach/mux.h> 57 #include <linux/omap-dma.h> 58 #include <clocksource/timer-ti-dm.h> 59 60 #include <mach/irqs.h> 61 62 #include "iomap.h" 63 #include "clock.h" 64 #include "pm.h" 65 #include "soc.h" 66 #include "sram.h" 67 68 static unsigned int arm_sleep_save[ARM_SLEEP_SAVE_SIZE]; 69 static unsigned short dsp_sleep_save[DSP_SLEEP_SAVE_SIZE]; 70 static unsigned short ulpd_sleep_save[ULPD_SLEEP_SAVE_SIZE]; 71 static unsigned int mpui7xx_sleep_save[MPUI7XX_SLEEP_SAVE_SIZE]; 72 static unsigned int mpui1510_sleep_save[MPUI1510_SLEEP_SAVE_SIZE]; 73 static unsigned int mpui1610_sleep_save[MPUI1610_SLEEP_SAVE_SIZE]; 74 75 static unsigned short enable_dyn_sleep; 76 77 static ssize_t idle_show(struct kobject *kobj, struct kobj_attribute *attr, 78 char *buf) 79 { 80 return sprintf(buf, "%hu\n", enable_dyn_sleep); 81 } 82 83 static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr, 84 const char * buf, size_t n) 85 { 86 unsigned short value; 87 if (sscanf(buf, "%hu", &value) != 1 || 88 (value != 0 && value != 1) || 89 (value != 0 && !IS_ENABLED(CONFIG_OMAP_32K_TIMER))) { 90 pr_err("idle_sleep_store: Invalid value\n"); 91 return -EINVAL; 92 } 93 enable_dyn_sleep = value; 94 return n; 95 } 96 97 static struct kobj_attribute sleep_while_idle_attr = 98 __ATTR(sleep_while_idle, 0644, idle_show, idle_store); 99 100 101 static void (*omap_sram_suspend)(unsigned long r0, unsigned long r1) = NULL; 102 103 /* 104 * Let's power down on idle, but only if we are really 105 * idle, because once we start down the path of 106 * going idle we continue to do idle even if we get 107 * a clock tick interrupt . . 108 */ 109 void omap1_pm_idle(void) 110 { 111 extern __u32 arm_idlect1_mask; 112 __u32 use_idlect1 = arm_idlect1_mask; 113 114 local_fiq_disable(); 115 116 #if defined(CONFIG_OMAP_MPU_TIMER) && !defined(CONFIG_OMAP_DM_TIMER) 117 use_idlect1 = use_idlect1 & ~(1 << 9); 118 #endif 119 120 #ifdef CONFIG_OMAP_DM_TIMER 121 use_idlect1 = omap_dm_timer_modify_idlect_mask(use_idlect1); 122 #endif 123 124 if (omap_dma_running()) 125 use_idlect1 &= ~(1 << 6); 126 127 /* 128 * We should be able to remove the do_sleep variable and multiple 129 * tests above as soon as drivers, timer and DMA code have been fixed. 130 * Even the sleep block count should become obsolete. 131 */ 132 if ((use_idlect1 != ~0) || !enable_dyn_sleep) { 133 134 __u32 saved_idlect1 = omap_readl(ARM_IDLECT1); 135 if (cpu_is_omap15xx()) 136 use_idlect1 &= OMAP1510_BIG_SLEEP_REQUEST; 137 else 138 use_idlect1 &= OMAP1610_IDLECT1_SLEEP_VAL; 139 omap_writel(use_idlect1, ARM_IDLECT1); 140 __asm__ volatile ("mcr p15, 0, r0, c7, c0, 4"); 141 omap_writel(saved_idlect1, ARM_IDLECT1); 142 143 local_fiq_enable(); 144 return; 145 } 146 omap_sram_suspend(omap_readl(ARM_IDLECT1), 147 omap_readl(ARM_IDLECT2)); 148 149 local_fiq_enable(); 150 } 151 152 /* 153 * Configuration of the wakeup event is board specific. For the 154 * moment we put it into this helper function. Later it may move 155 * to board specific files. 156 */ 157 static void omap_pm_wakeup_setup(void) 158 { 159 u32 level1_wake = 0; 160 u32 level2_wake = OMAP_IRQ_BIT(INT_UART2); 161 162 /* 163 * Turn off all interrupts except GPIO bank 1, L1-2nd level cascade, 164 * and the L2 wakeup interrupts: keypad and UART2. Note that the 165 * drivers must still separately call omap_set_gpio_wakeup() to 166 * wake up to a GPIO interrupt. 167 */ 168 if (cpu_is_omap7xx()) 169 level1_wake = OMAP_IRQ_BIT(INT_7XX_GPIO_BANK1) | 170 OMAP_IRQ_BIT(INT_7XX_IH2_IRQ); 171 else if (cpu_is_omap15xx()) 172 level1_wake = OMAP_IRQ_BIT(INT_GPIO_BANK1) | 173 OMAP_IRQ_BIT(INT_1510_IH2_IRQ); 174 else if (cpu_is_omap16xx()) 175 level1_wake = OMAP_IRQ_BIT(INT_GPIO_BANK1) | 176 OMAP_IRQ_BIT(INT_1610_IH2_IRQ); 177 178 omap_writel(~level1_wake, OMAP_IH1_MIR); 179 180 if (cpu_is_omap7xx()) { 181 omap_writel(~level2_wake, OMAP_IH2_0_MIR); 182 omap_writel(~(OMAP_IRQ_BIT(INT_7XX_WAKE_UP_REQ) | 183 OMAP_IRQ_BIT(INT_7XX_MPUIO_KEYPAD)), 184 OMAP_IH2_1_MIR); 185 } else if (cpu_is_omap15xx()) { 186 level2_wake |= OMAP_IRQ_BIT(INT_KEYBOARD); 187 omap_writel(~level2_wake, OMAP_IH2_MIR); 188 } else if (cpu_is_omap16xx()) { 189 level2_wake |= OMAP_IRQ_BIT(INT_KEYBOARD); 190 omap_writel(~level2_wake, OMAP_IH2_0_MIR); 191 192 /* INT_1610_WAKE_UP_REQ is needed for GPIO wakeup... */ 193 omap_writel(~OMAP_IRQ_BIT(INT_1610_WAKE_UP_REQ), 194 OMAP_IH2_1_MIR); 195 omap_writel(~0x0, OMAP_IH2_2_MIR); 196 omap_writel(~0x0, OMAP_IH2_3_MIR); 197 } 198 199 /* New IRQ agreement, recalculate in cascade order */ 200 omap_writel(1, OMAP_IH2_CONTROL); 201 omap_writel(1, OMAP_IH1_CONTROL); 202 } 203 204 #define EN_DSPCK 13 /* ARM_CKCTL */ 205 #define EN_APICK 6 /* ARM_IDLECT2 */ 206 #define DSP_EN 1 /* ARM_RSTCT1 */ 207 208 void omap1_pm_suspend(void) 209 { 210 unsigned long arg0 = 0, arg1 = 0; 211 212 printk(KERN_INFO "PM: OMAP%x is trying to enter deep sleep...\n", 213 omap_rev()); 214 215 omap_serial_wake_trigger(1); 216 217 if (!cpu_is_omap15xx()) 218 omap_writew(0xffff, ULPD_SOFT_DISABLE_REQ_REG); 219 220 /* 221 * Step 1: turn off interrupts (FIXME: NOTE: already disabled) 222 */ 223 224 local_irq_disable(); 225 local_fiq_disable(); 226 227 /* 228 * Step 2: save registers 229 * 230 * The omap is a strange/beautiful device. The caches, memory 231 * and register state are preserved across power saves. 232 * We have to save and restore very little register state to 233 * idle the omap. 234 * 235 * Save interrupt, MPUI, ARM and UPLD control registers. 236 */ 237 238 if (cpu_is_omap7xx()) { 239 MPUI7XX_SAVE(OMAP_IH1_MIR); 240 MPUI7XX_SAVE(OMAP_IH2_0_MIR); 241 MPUI7XX_SAVE(OMAP_IH2_1_MIR); 242 MPUI7XX_SAVE(MPUI_CTRL); 243 MPUI7XX_SAVE(MPUI_DSP_BOOT_CONFIG); 244 MPUI7XX_SAVE(MPUI_DSP_API_CONFIG); 245 MPUI7XX_SAVE(EMIFS_CONFIG); 246 MPUI7XX_SAVE(EMIFF_SDRAM_CONFIG); 247 248 } else if (cpu_is_omap15xx()) { 249 MPUI1510_SAVE(OMAP_IH1_MIR); 250 MPUI1510_SAVE(OMAP_IH2_MIR); 251 MPUI1510_SAVE(MPUI_CTRL); 252 MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG); 253 MPUI1510_SAVE(MPUI_DSP_API_CONFIG); 254 MPUI1510_SAVE(EMIFS_CONFIG); 255 MPUI1510_SAVE(EMIFF_SDRAM_CONFIG); 256 } else if (cpu_is_omap16xx()) { 257 MPUI1610_SAVE(OMAP_IH1_MIR); 258 MPUI1610_SAVE(OMAP_IH2_0_MIR); 259 MPUI1610_SAVE(OMAP_IH2_1_MIR); 260 MPUI1610_SAVE(OMAP_IH2_2_MIR); 261 MPUI1610_SAVE(OMAP_IH2_3_MIR); 262 MPUI1610_SAVE(MPUI_CTRL); 263 MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG); 264 MPUI1610_SAVE(MPUI_DSP_API_CONFIG); 265 MPUI1610_SAVE(EMIFS_CONFIG); 266 MPUI1610_SAVE(EMIFF_SDRAM_CONFIG); 267 } 268 269 ARM_SAVE(ARM_CKCTL); 270 ARM_SAVE(ARM_IDLECT1); 271 ARM_SAVE(ARM_IDLECT2); 272 if (!(cpu_is_omap15xx())) 273 ARM_SAVE(ARM_IDLECT3); 274 ARM_SAVE(ARM_EWUPCT); 275 ARM_SAVE(ARM_RSTCT1); 276 ARM_SAVE(ARM_RSTCT2); 277 ARM_SAVE(ARM_SYSST); 278 ULPD_SAVE(ULPD_CLOCK_CTRL); 279 ULPD_SAVE(ULPD_STATUS_REQ); 280 281 /* (Step 3 removed - we now allow deep sleep by default) */ 282 283 /* 284 * Step 4: OMAP DSP Shutdown 285 */ 286 287 /* stop DSP */ 288 omap_writew(omap_readw(ARM_RSTCT1) & ~(1 << DSP_EN), ARM_RSTCT1); 289 290 /* shut down dsp_ck */ 291 if (!cpu_is_omap7xx()) 292 omap_writew(omap_readw(ARM_CKCTL) & ~(1 << EN_DSPCK), ARM_CKCTL); 293 294 /* temporarily enabling api_ck to access DSP registers */ 295 omap_writew(omap_readw(ARM_IDLECT2) | 1 << EN_APICK, ARM_IDLECT2); 296 297 /* save DSP registers */ 298 DSP_SAVE(DSP_IDLECT2); 299 300 /* Stop all DSP domain clocks */ 301 __raw_writew(0, DSP_IDLECT2); 302 303 /* 304 * Step 5: Wakeup Event Setup 305 */ 306 307 omap_pm_wakeup_setup(); 308 309 /* 310 * Step 6: ARM and Traffic controller shutdown 311 */ 312 313 /* disable ARM watchdog */ 314 omap_writel(0x00F5, OMAP_WDT_TIMER_MODE); 315 omap_writel(0x00A0, OMAP_WDT_TIMER_MODE); 316 317 /* 318 * Step 6b: ARM and Traffic controller shutdown 319 * 320 * Step 6 continues here. Prepare jump to power management 321 * assembly code in internal SRAM. 322 * 323 * Since the omap_cpu_suspend routine has been copied to 324 * SRAM, we'll do an indirect procedure call to it and pass the 325 * contents of arm_idlect1 and arm_idlect2 so it can restore 326 * them when it wakes up and it will return. 327 */ 328 329 arg0 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT1]; 330 arg1 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT2]; 331 332 /* 333 * Step 6c: ARM and Traffic controller shutdown 334 * 335 * Jump to assembly code. The processor will stay there 336 * until wake up. 337 */ 338 omap_sram_suspend(arg0, arg1); 339 340 /* 341 * If we are here, processor is woken up! 342 */ 343 344 /* 345 * Restore DSP clocks 346 */ 347 348 /* again temporarily enabling api_ck to access DSP registers */ 349 omap_writew(omap_readw(ARM_IDLECT2) | 1 << EN_APICK, ARM_IDLECT2); 350 351 /* Restore DSP domain clocks */ 352 DSP_RESTORE(DSP_IDLECT2); 353 354 /* 355 * Restore ARM state, except ARM_IDLECT1/2 which omap_cpu_suspend did 356 */ 357 358 if (!(cpu_is_omap15xx())) 359 ARM_RESTORE(ARM_IDLECT3); 360 ARM_RESTORE(ARM_CKCTL); 361 ARM_RESTORE(ARM_EWUPCT); 362 ARM_RESTORE(ARM_RSTCT1); 363 ARM_RESTORE(ARM_RSTCT2); 364 ARM_RESTORE(ARM_SYSST); 365 ULPD_RESTORE(ULPD_CLOCK_CTRL); 366 ULPD_RESTORE(ULPD_STATUS_REQ); 367 368 if (cpu_is_omap7xx()) { 369 MPUI7XX_RESTORE(EMIFS_CONFIG); 370 MPUI7XX_RESTORE(EMIFF_SDRAM_CONFIG); 371 MPUI7XX_RESTORE(OMAP_IH1_MIR); 372 MPUI7XX_RESTORE(OMAP_IH2_0_MIR); 373 MPUI7XX_RESTORE(OMAP_IH2_1_MIR); 374 } else if (cpu_is_omap15xx()) { 375 MPUI1510_RESTORE(MPUI_CTRL); 376 MPUI1510_RESTORE(MPUI_DSP_BOOT_CONFIG); 377 MPUI1510_RESTORE(MPUI_DSP_API_CONFIG); 378 MPUI1510_RESTORE(EMIFS_CONFIG); 379 MPUI1510_RESTORE(EMIFF_SDRAM_CONFIG); 380 MPUI1510_RESTORE(OMAP_IH1_MIR); 381 MPUI1510_RESTORE(OMAP_IH2_MIR); 382 } else if (cpu_is_omap16xx()) { 383 MPUI1610_RESTORE(MPUI_CTRL); 384 MPUI1610_RESTORE(MPUI_DSP_BOOT_CONFIG); 385 MPUI1610_RESTORE(MPUI_DSP_API_CONFIG); 386 MPUI1610_RESTORE(EMIFS_CONFIG); 387 MPUI1610_RESTORE(EMIFF_SDRAM_CONFIG); 388 389 MPUI1610_RESTORE(OMAP_IH1_MIR); 390 MPUI1610_RESTORE(OMAP_IH2_0_MIR); 391 MPUI1610_RESTORE(OMAP_IH2_1_MIR); 392 MPUI1610_RESTORE(OMAP_IH2_2_MIR); 393 MPUI1610_RESTORE(OMAP_IH2_3_MIR); 394 } 395 396 if (!cpu_is_omap15xx()) 397 omap_writew(0, ULPD_SOFT_DISABLE_REQ_REG); 398 399 /* 400 * Re-enable interrupts 401 */ 402 403 local_irq_enable(); 404 local_fiq_enable(); 405 406 omap_serial_wake_trigger(0); 407 408 printk(KERN_INFO "PM: OMAP%x is re-starting from deep sleep...\n", 409 omap_rev()); 410 } 411 412 #ifdef CONFIG_DEBUG_FS 413 /* 414 * Read system PM registers for debugging 415 */ 416 static int omap_pm_debug_show(struct seq_file *m, void *v) 417 { 418 ARM_SAVE(ARM_CKCTL); 419 ARM_SAVE(ARM_IDLECT1); 420 ARM_SAVE(ARM_IDLECT2); 421 if (!(cpu_is_omap15xx())) 422 ARM_SAVE(ARM_IDLECT3); 423 ARM_SAVE(ARM_EWUPCT); 424 ARM_SAVE(ARM_RSTCT1); 425 ARM_SAVE(ARM_RSTCT2); 426 ARM_SAVE(ARM_SYSST); 427 428 ULPD_SAVE(ULPD_IT_STATUS); 429 ULPD_SAVE(ULPD_CLOCK_CTRL); 430 ULPD_SAVE(ULPD_SOFT_REQ); 431 ULPD_SAVE(ULPD_STATUS_REQ); 432 ULPD_SAVE(ULPD_DPLL_CTRL); 433 ULPD_SAVE(ULPD_POWER_CTRL); 434 435 if (cpu_is_omap7xx()) { 436 MPUI7XX_SAVE(MPUI_CTRL); 437 MPUI7XX_SAVE(MPUI_DSP_STATUS); 438 MPUI7XX_SAVE(MPUI_DSP_BOOT_CONFIG); 439 MPUI7XX_SAVE(MPUI_DSP_API_CONFIG); 440 MPUI7XX_SAVE(EMIFF_SDRAM_CONFIG); 441 MPUI7XX_SAVE(EMIFS_CONFIG); 442 } else if (cpu_is_omap15xx()) { 443 MPUI1510_SAVE(MPUI_CTRL); 444 MPUI1510_SAVE(MPUI_DSP_STATUS); 445 MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG); 446 MPUI1510_SAVE(MPUI_DSP_API_CONFIG); 447 MPUI1510_SAVE(EMIFF_SDRAM_CONFIG); 448 MPUI1510_SAVE(EMIFS_CONFIG); 449 } else if (cpu_is_omap16xx()) { 450 MPUI1610_SAVE(MPUI_CTRL); 451 MPUI1610_SAVE(MPUI_DSP_STATUS); 452 MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG); 453 MPUI1610_SAVE(MPUI_DSP_API_CONFIG); 454 MPUI1610_SAVE(EMIFF_SDRAM_CONFIG); 455 MPUI1610_SAVE(EMIFS_CONFIG); 456 } 457 458 seq_printf(m, 459 "ARM_CKCTL_REG: 0x%-8x \n" 460 "ARM_IDLECT1_REG: 0x%-8x \n" 461 "ARM_IDLECT2_REG: 0x%-8x \n" 462 "ARM_IDLECT3_REG: 0x%-8x \n" 463 "ARM_EWUPCT_REG: 0x%-8x \n" 464 "ARM_RSTCT1_REG: 0x%-8x \n" 465 "ARM_RSTCT2_REG: 0x%-8x \n" 466 "ARM_SYSST_REG: 0x%-8x \n" 467 "ULPD_IT_STATUS_REG: 0x%-4x \n" 468 "ULPD_CLOCK_CTRL_REG: 0x%-4x \n" 469 "ULPD_SOFT_REQ_REG: 0x%-4x \n" 470 "ULPD_DPLL_CTRL_REG: 0x%-4x \n" 471 "ULPD_STATUS_REQ_REG: 0x%-4x \n" 472 "ULPD_POWER_CTRL_REG: 0x%-4x \n", 473 ARM_SHOW(ARM_CKCTL), 474 ARM_SHOW(ARM_IDLECT1), 475 ARM_SHOW(ARM_IDLECT2), 476 ARM_SHOW(ARM_IDLECT3), 477 ARM_SHOW(ARM_EWUPCT), 478 ARM_SHOW(ARM_RSTCT1), 479 ARM_SHOW(ARM_RSTCT2), 480 ARM_SHOW(ARM_SYSST), 481 ULPD_SHOW(ULPD_IT_STATUS), 482 ULPD_SHOW(ULPD_CLOCK_CTRL), 483 ULPD_SHOW(ULPD_SOFT_REQ), 484 ULPD_SHOW(ULPD_DPLL_CTRL), 485 ULPD_SHOW(ULPD_STATUS_REQ), 486 ULPD_SHOW(ULPD_POWER_CTRL)); 487 488 if (cpu_is_omap7xx()) { 489 seq_printf(m, 490 "MPUI7XX_CTRL_REG 0x%-8x \n" 491 "MPUI7XX_DSP_STATUS_REG: 0x%-8x \n" 492 "MPUI7XX_DSP_BOOT_CONFIG_REG: 0x%-8x \n" 493 "MPUI7XX_DSP_API_CONFIG_REG: 0x%-8x \n" 494 "MPUI7XX_SDRAM_CONFIG_REG: 0x%-8x \n" 495 "MPUI7XX_EMIFS_CONFIG_REG: 0x%-8x \n", 496 MPUI7XX_SHOW(MPUI_CTRL), 497 MPUI7XX_SHOW(MPUI_DSP_STATUS), 498 MPUI7XX_SHOW(MPUI_DSP_BOOT_CONFIG), 499 MPUI7XX_SHOW(MPUI_DSP_API_CONFIG), 500 MPUI7XX_SHOW(EMIFF_SDRAM_CONFIG), 501 MPUI7XX_SHOW(EMIFS_CONFIG)); 502 } else if (cpu_is_omap15xx()) { 503 seq_printf(m, 504 "MPUI1510_CTRL_REG 0x%-8x \n" 505 "MPUI1510_DSP_STATUS_REG: 0x%-8x \n" 506 "MPUI1510_DSP_BOOT_CONFIG_REG: 0x%-8x \n" 507 "MPUI1510_DSP_API_CONFIG_REG: 0x%-8x \n" 508 "MPUI1510_SDRAM_CONFIG_REG: 0x%-8x \n" 509 "MPUI1510_EMIFS_CONFIG_REG: 0x%-8x \n", 510 MPUI1510_SHOW(MPUI_CTRL), 511 MPUI1510_SHOW(MPUI_DSP_STATUS), 512 MPUI1510_SHOW(MPUI_DSP_BOOT_CONFIG), 513 MPUI1510_SHOW(MPUI_DSP_API_CONFIG), 514 MPUI1510_SHOW(EMIFF_SDRAM_CONFIG), 515 MPUI1510_SHOW(EMIFS_CONFIG)); 516 } else if (cpu_is_omap16xx()) { 517 seq_printf(m, 518 "MPUI1610_CTRL_REG 0x%-8x \n" 519 "MPUI1610_DSP_STATUS_REG: 0x%-8x \n" 520 "MPUI1610_DSP_BOOT_CONFIG_REG: 0x%-8x \n" 521 "MPUI1610_DSP_API_CONFIG_REG: 0x%-8x \n" 522 "MPUI1610_SDRAM_CONFIG_REG: 0x%-8x \n" 523 "MPUI1610_EMIFS_CONFIG_REG: 0x%-8x \n", 524 MPUI1610_SHOW(MPUI_CTRL), 525 MPUI1610_SHOW(MPUI_DSP_STATUS), 526 MPUI1610_SHOW(MPUI_DSP_BOOT_CONFIG), 527 MPUI1610_SHOW(MPUI_DSP_API_CONFIG), 528 MPUI1610_SHOW(EMIFF_SDRAM_CONFIG), 529 MPUI1610_SHOW(EMIFS_CONFIG)); 530 } 531 532 return 0; 533 } 534 535 DEFINE_SHOW_ATTRIBUTE(omap_pm_debug); 536 537 static void omap_pm_init_debugfs(void) 538 { 539 struct dentry *d; 540 541 d = debugfs_create_dir("pm_debug", NULL); 542 debugfs_create_file("omap_pm", S_IWUSR | S_IRUGO, d, NULL, 543 &omap_pm_debug_fops); 544 } 545 546 #endif /* CONFIG_DEBUG_FS */ 547 548 /* 549 * omap_pm_prepare - Do preliminary suspend work. 550 * 551 */ 552 static int omap_pm_prepare(void) 553 { 554 /* We cannot sleep in idle until we have resumed */ 555 cpu_idle_poll_ctrl(true); 556 return 0; 557 } 558 559 560 /* 561 * omap_pm_enter - Actually enter a sleep state. 562 * @state: State we're entering. 563 * 564 */ 565 566 static int omap_pm_enter(suspend_state_t state) 567 { 568 switch (state) 569 { 570 case PM_SUSPEND_MEM: 571 omap1_pm_suspend(); 572 break; 573 default: 574 return -EINVAL; 575 } 576 577 return 0; 578 } 579 580 581 /** 582 * omap_pm_finish - Finish up suspend sequence. 583 * 584 * This is called after we wake back up (or if entering the sleep state 585 * failed). 586 */ 587 588 static void omap_pm_finish(void) 589 { 590 cpu_idle_poll_ctrl(false); 591 } 592 593 594 static irqreturn_t omap_wakeup_interrupt(int irq, void *dev) 595 { 596 return IRQ_HANDLED; 597 } 598 599 600 601 static const struct platform_suspend_ops omap_pm_ops = { 602 .prepare = omap_pm_prepare, 603 .enter = omap_pm_enter, 604 .finish = omap_pm_finish, 605 .valid = suspend_valid_only_mem, 606 }; 607 608 static int __init omap_pm_init(void) 609 { 610 int error = 0; 611 int irq; 612 613 if (!cpu_class_is_omap1()) 614 return -ENODEV; 615 616 pr_info("Power Management for TI OMAP.\n"); 617 618 if (!IS_ENABLED(CONFIG_OMAP_32K_TIMER)) 619 pr_info("OMAP1 PM: sleep states in idle disabled due to no 32KiHz timer\n"); 620 621 if (!IS_ENABLED(CONFIG_OMAP_DM_TIMER)) 622 pr_info("OMAP1 PM: sleep states in idle disabled due to no DMTIMER support\n"); 623 624 if (IS_ENABLED(CONFIG_OMAP_32K_TIMER) && 625 IS_ENABLED(CONFIG_OMAP_DM_TIMER)) { 626 /* OMAP16xx only */ 627 pr_info("OMAP1 PM: sleep states in idle enabled\n"); 628 enable_dyn_sleep = 1; 629 } 630 631 /* 632 * We copy the assembler sleep/wakeup routines to SRAM. 633 * These routines need to be in SRAM as that's the only 634 * memory the MPU can see when it wakes up. 635 */ 636 if (cpu_is_omap7xx()) { 637 omap_sram_suspend = omap_sram_push(omap7xx_cpu_suspend, 638 omap7xx_cpu_suspend_sz); 639 } else if (cpu_is_omap15xx()) { 640 omap_sram_suspend = omap_sram_push(omap1510_cpu_suspend, 641 omap1510_cpu_suspend_sz); 642 } else if (cpu_is_omap16xx()) { 643 omap_sram_suspend = omap_sram_push(omap1610_cpu_suspend, 644 omap1610_cpu_suspend_sz); 645 } 646 647 if (omap_sram_suspend == NULL) { 648 printk(KERN_ERR "PM not initialized: Missing SRAM support\n"); 649 return -ENODEV; 650 } 651 652 arm_pm_idle = omap1_pm_idle; 653 654 if (cpu_is_omap7xx()) 655 irq = INT_7XX_WAKE_UP_REQ; 656 else if (cpu_is_omap16xx()) 657 irq = INT_1610_WAKE_UP_REQ; 658 if (request_irq(irq, omap_wakeup_interrupt, 0, "peripheral wakeup", 659 NULL)) 660 pr_err("Failed to request irq %d (peripheral wakeup)\n", irq); 661 662 /* Program new power ramp-up time 663 * (0 for most boards since we don't lower voltage when in deep sleep) 664 */ 665 omap_writew(ULPD_SETUP_ANALOG_CELL_3_VAL, ULPD_SETUP_ANALOG_CELL_3); 666 667 /* Setup ULPD POWER_CTRL_REG - enter deep sleep whenever possible */ 668 omap_writew(ULPD_POWER_CTRL_REG_VAL, ULPD_POWER_CTRL); 669 670 /* Configure IDLECT3 */ 671 if (cpu_is_omap7xx()) 672 omap_writel(OMAP7XX_IDLECT3_VAL, OMAP7XX_IDLECT3); 673 else if (cpu_is_omap16xx()) 674 omap_writel(OMAP1610_IDLECT3_VAL, OMAP1610_IDLECT3); 675 676 suspend_set_ops(&omap_pm_ops); 677 678 #ifdef CONFIG_DEBUG_FS 679 omap_pm_init_debugfs(); 680 #endif 681 682 error = sysfs_create_file(power_kobj, &sleep_while_idle_attr.attr); 683 if (error) 684 printk(KERN_ERR "sysfs_create_file failed: %d\n", error); 685 686 if (cpu_is_omap16xx()) { 687 /* configure LOW_PWR pin */ 688 omap_cfg_reg(T20_1610_LOW_PWR); 689 } 690 691 return error; 692 } 693 __initcall(omap_pm_init); 694