src/soc/samsung/exynos5250/power.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 /* Power setup code for EXYNOS5 */
  17
  18 #include <arch/io.h>
  19 #include <console/console.h>
  20 #include <halt.h>
  21 #include <soc/dmc.h>
  22 #include <soc/power.h>
  23 #include <soc/setup.h>
  24
  25 /* Set the PS-Hold drive value */
  26 static void ps_hold_setup(void)
  27 {
  28         /* Set PS-Hold high */
  29         setbits_le32(&exynos_power->ps_hold_ctrl,
  30                      POWER_PS_HOLD_CONTROL_DATA_HIGH);
  31 }
  32
  33 void power_reset(void)
  34 {
  35         /* Clear inform1 so there's no change we think we've got a wake reset */
  36         exynos_power->inform1 = 0;
  37
  38         setbits_le32(&exynos_power->sw_reset, 1);
  39 }
  40
  41 /* This function never returns */
  42 void power_shutdown(void)
  43 {
  44         clrbits_le32(&exynos_power->ps_hold_ctrl,
  45                      POWER_PS_HOLD_CONTROL_DATA_HIGH);
  46
  47         halt();
  48 }
  49
  50 void power_enable_dp_phy(void)
  51 {
  52         setbits_le32(&exynos_power->dptx_phy_control, EXYNOS_DP_PHY_ENABLE);
  53 }
  54
  55 void power_enable_hw_thermal_trip(void)
  56 {
  57         /* Enable HW thermal trip */
  58         setbits_le32(&exynos_power->ps_hold_ctrl, POWER_ENABLE_HW_TRIP);
  59 }
  60
  61 uint32_t power_read_reset_status(void)
  62 {
  63         return exynos_power->inform1;
  64 }
  65
  66 void power_exit_wakeup(void)
  67 {
  68         typedef void (*resume_func)(void);
  69
  70         ((resume_func)exynos_power->inform0)();
  71 }
  72
  73 int power_init(void)
  74 {
  75         ps_hold_setup();
  76         return 0;
  77 }
  78
  79 void power_enable_xclkout(void)
  80 {
  81         /* use xxti for xclk out */
  82         clrsetbits_le32(&exynos_power->pmu_debug, PMU_DEBUG_CLKOUT_SEL_MASK,
  83                         PMU_DEBUG_XXTI);
  84 }
  85
  86 void power_release_uart_retention(void)
  87 {
  88         write32(&exynos_power->padret_uart_opt, 1 << 28);
  89 }