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

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics
   3  * Donghwa Lee <dh09.lee@samsung.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <asm/io.h>
  26 #include <asm/arch/power.h>
  27
  28 static void exynos4_mipi_phy_control(unsigned int dev_index,
  29                                         unsigned int enable)
  30 {
  31         struct exynos4_power *pmu =
  32             (struct exynos4_power *)samsung_get_base_power();
  33         unsigned int addr, cfg = 0;
  34
  35         if (dev_index == 0)
  36                 addr = (unsigned int)&pmu->mipi_phy0_control;
  37         else
  38                 addr = (unsigned int)&pmu->mipi_phy1_control;
  39
  40
  41         cfg = readl(addr);
  42         if (enable)
  43                 cfg |= (EXYNOS_MIPI_PHY_MRESETN | EXYNOS_MIPI_PHY_ENABLE);
  44         else
  45                 cfg &= ~(EXYNOS_MIPI_PHY_MRESETN | EXYNOS_MIPI_PHY_ENABLE);
  46
  47         writel(cfg, addr);
  48 }
  49
  50 void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable)
  51 {
  52         if (cpu_is_exynos4())
  53                 exynos4_mipi_phy_control(dev_index, enable);
  54 }
  55
  56 void exynos5_set_usbhost_phy_ctrl(unsigned int enable)
  57 {
  58         struct exynos5_power *power =
  59                 (struct exynos5_power *)samsung_get_base_power();
  60
  61         if (enable) {
  62                 /* Enabling USBHOST_PHY */
  63                 setbits_le32(&power->usbhost_phy_control,
  64                                 POWER_USB_HOST_PHY_CTRL_EN);
  65         } else {
  66                 /* Disabling USBHOST_PHY */
  67                 clrbits_le32(&power->usbhost_phy_control,
  68                                 POWER_USB_HOST_PHY_CTRL_EN);
  69         }
  70 }
  71
  72 void set_usbhost_phy_ctrl(unsigned int enable)
  73 {
  74         if (cpu_is_exynos5())
  75                 exynos5_set_usbhost_phy_ctrl(enable);
  76 }
  77
  78 static void exynos5_dp_phy_control(unsigned int enable)
  79 {
  80         unsigned int cfg;
  81         struct exynos5_power *power =
  82             (struct exynos5_power *)samsung_get_base_power();
  83
  84         cfg = readl(&power->dptx_phy_control);
  85         if (enable)
  86                 cfg |= EXYNOS_DP_PHY_ENABLE;
  87         else
  88                 cfg &= ~EXYNOS_DP_PHY_ENABLE;
  89
  90         writel(cfg, &power->dptx_phy_control);
  91 }
  92
  93 void set_dp_phy_ctrl(unsigned int enable)
  94 {
  95         if (cpu_is_exynos5())
  96                 exynos5_dp_phy_control(enable);
  97 }
  98
  99 static void exynos5_set_ps_hold_ctrl(void)
 100 {
 101         struct exynos5_power *power =
 102                 (struct exynos5_power *)samsung_get_base_power();
 103
 104         /* Set PS-Hold high */
 105         setbits_le32(&power->ps_hold_control,
 106                         EXYNOS_PS_HOLD_CONTROL_DATA_HIGH);
 107 }
 108
 109 void set_ps_hold_ctrl(void)
 110 {
 111         if (cpu_is_exynos5())
 112                 exynos5_set_ps_hold_ctrl();
 113 }
 114
 115
 116 static void exynos5_set_xclkout(void)
 117 {
 118         struct exynos5_power *power =
 119                 (struct exynos5_power *)samsung_get_base_power();
 120
 121         /* use xxti for xclk out */
 122         clrsetbits_le32(&power->pmu_debug, PMU_DEBUG_CLKOUT_SEL_MASK,
 123                                 PMU_DEBUG_XXTI);
 124 }
 125
 126 void set_xclkout(void)
 127 {
 128         if (cpu_is_exynos5())
 129                 exynos5_set_xclkout();
 130 }
 131
 132 /* Enables hardware tripping to power off the system when TMU fails */
 133 void set_hw_thermal_trip(void)
 134 {
 135         if (cpu_is_exynos5()) {
 136                 struct exynos5_power *power =
 137                         (struct exynos5_power *)samsung_get_base_power();
 138
 139                 /* PS_HOLD_CONTROL register ENABLE_HW_TRIP bit*/
 140                 setbits_le32(&power->ps_hold_control, POWER_ENABLE_HW_TRIP);
 141         }
 142 }