arch/arm/cpu/armv7/exynos/power.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics
   3  * Donghwa Lee <dh09.lee@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/power.h>
  11
  12 static void exynos4_mipi_phy_control(unsigned int dev_index,
  13                                         unsigned int enable)
  14 {
  15         struct exynos4_power *pmu =
  16             (struct exynos4_power *)samsung_get_base_power();
  17         unsigned int addr, cfg = 0;
  18
  19         if (dev_index == 0)
  20                 addr = (unsigned int)&pmu->mipi_phy0_control;
  21         else
  22                 addr = (unsigned int)&pmu->mipi_phy1_control;
  23
  24
  25         cfg = readl(addr);
  26         if (enable)
  27                 cfg |= (EXYNOS_MIPI_PHY_MRESETN | EXYNOS_MIPI_PHY_ENABLE);
  28         else
  29                 cfg &= ~(EXYNOS_MIPI_PHY_MRESETN | EXYNOS_MIPI_PHY_ENABLE);
  30
  31         writel(cfg, addr);
  32 }
  33
  34 void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable)
  35 {
  36         if (cpu_is_exynos4())
  37                 exynos4_mipi_phy_control(dev_index, enable);
  38 }
  39
  40 void exynos5_set_usbhost_phy_ctrl(unsigned int enable)
  41 {
  42         struct exynos5_power *power =
  43                 (struct exynos5_power *)samsung_get_base_power();
  44
  45         if (enable) {
  46                 /* Enabling USBHOST_PHY */
  47                 setbits_le32(&power->usbhost_phy_control,
  48                                 POWER_USB_HOST_PHY_CTRL_EN);
  49         } else {
  50                 /* Disabling USBHOST_PHY */
  51                 clrbits_le32(&power->usbhost_phy_control,
  52                                 POWER_USB_HOST_PHY_CTRL_EN);
  53         }
  54 }
  55
  56 void set_usbhost_phy_ctrl(unsigned int enable)
  57 {
  58         if (cpu_is_exynos5())
  59                 exynos5_set_usbhost_phy_ctrl(enable);
  60 }
  61
  62 static void exynos5_set_usbdrd_phy_ctrl(unsigned int enable)
  63 {
  64         struct exynos5_power *power =
  65                 (struct exynos5_power *)samsung_get_base_power();
  66
  67         if (enable) {
  68                 /* Enabling USBDRD_PHY */
  69                 setbits_le32(&power->usbdrd_phy_control,
  70                                 POWER_USB_DRD_PHY_CTRL_EN);
  71         } else {
  72                 /* Disabling USBDRD_PHY */
  73                 clrbits_le32(&power->usbdrd_phy_control,
  74                                 POWER_USB_DRD_PHY_CTRL_EN);
  75         }
  76 }
  77
  78 void set_usbdrd_phy_ctrl(unsigned int enable)
  79 {
  80         if (cpu_is_exynos5())
  81                 exynos5_set_usbdrd_phy_ctrl(enable);
  82 }
  83
  84 static void exynos5_dp_phy_control(unsigned int enable)
  85 {
  86         unsigned int cfg;
  87         struct exynos5_power *power =
  88             (struct exynos5_power *)samsung_get_base_power();
  89
  90         cfg = readl(&power->dptx_phy_control);
  91         if (enable)
  92                 cfg |= EXYNOS_DP_PHY_ENABLE;
  93         else
  94                 cfg &= ~EXYNOS_DP_PHY_ENABLE;
  95
  96         writel(cfg, &power->dptx_phy_control);
  97 }
  98
  99 void set_dp_phy_ctrl(unsigned int enable)
 100 {
 101         if (cpu_is_exynos5())
 102                 exynos5_dp_phy_control(enable);
 103 }
 104
 105 static void exynos5_set_ps_hold_ctrl(void)
 106 {
 107         struct exynos5_power *power =
 108                 (struct exynos5_power *)samsung_get_base_power();
 109
 110         /* Set PS-Hold high */
 111         setbits_le32(&power->ps_hold_control,
 112                         EXYNOS_PS_HOLD_CONTROL_DATA_HIGH);
 113 }
 114
 115 /*
 116  * Set ps_hold data driving value high
 117  * This enables the machine to stay powered on
 118  * after the initial power-on condition goes away
 119  * (e.g. power button).
 120  */
 121 void set_ps_hold_ctrl(void)
 122 {
 123         if (cpu_is_exynos5())
 124                 exynos5_set_ps_hold_ctrl();
 125 }
 126
 127
 128 static void exynos5_set_xclkout(void)
 129 {
 130         struct exynos5_power *power =
 131                 (struct exynos5_power *)samsung_get_base_power();
 132
 133         /* use xxti for xclk out */
 134         clrsetbits_le32(&power->pmu_debug, PMU_DEBUG_CLKOUT_SEL_MASK,
 135                                 PMU_DEBUG_XXTI);
 136 }
 137
 138 void set_xclkout(void)
 139 {
 140         if (cpu_is_exynos5())
 141                 exynos5_set_xclkout();
 142 }
 143
 144 /* Enables hardware tripping to power off the system when TMU fails */
 145 void set_hw_thermal_trip(void)
 146 {
 147         if (cpu_is_exynos5()) {
 148                 struct exynos5_power *power =
 149                         (struct exynos5_power *)samsung_get_base_power();
 150
 151                 /* PS_HOLD_CONTROL register ENABLE_HW_TRIP bit*/
 152                 setbits_le32(&power->ps_hold_control, POWER_ENABLE_HW_TRIP);
 153         }
 154 }
 155
 156 static uint32_t exynos5_get_reset_status(void)
 157 {
 158         struct exynos5_power *power =
 159                 (struct exynos5_power *)samsung_get_base_power();
 160
 161         return power->inform1;
 162 }
 163
 164 static uint32_t exynos4_get_reset_status(void)
 165 {
 166         struct exynos4_power *power =
 167                 (struct exynos4_power *)samsung_get_base_power();
 168
 169         return power->inform1;
 170 }
 171
 172 uint32_t get_reset_status(void)
 173 {
 174         if (cpu_is_exynos5())
 175                 return exynos5_get_reset_status();
 176         else
 177                 return  exynos4_get_reset_status();
 178 }
 179
 180 static void exynos5_power_exit_wakeup(void)
 181 {
 182         struct exynos5_power *power =
 183                 (struct exynos5_power *)samsung_get_base_power();
 184         typedef void (*resume_func)(void);
 185
 186         ((resume_func)power->inform0)();
 187 }
 188
 189 static void exynos4_power_exit_wakeup(void)
 190 {
 191         struct exynos4_power *power =
 192                 (struct exynos4_power *)samsung_get_base_power();
 193         typedef void (*resume_func)(void);
 194
 195         ((resume_func)power->inform0)();
 196 }
 197
 198 void power_exit_wakeup(void)
 199 {
 200         if (cpu_is_exynos5())
 201                 exynos5_power_exit_wakeup();
 202         else
 203                 exynos4_power_exit_wakeup();
 204 }