Umang Agrawal | c1fc077 | 2017-12-19 12:06:49 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2018, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions are |
| 5 | * met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer in the documentation and/or other materials provided |
| 11 | * with the distribution. |
| 12 | * * Neither the name of The Linux Foundation nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <kernel/timer.h> |
| 30 | #include <qtimer.h> |
| 31 | #include <bits.h> |
| 32 | #include <debug.h> |
| 33 | #include <smem.h> |
| 34 | #include <spmi.h> |
| 35 | #include <platform/iomap.h> |
| 36 | #include <board.h> |
| 37 | #include <target.h> |
| 38 | #include <pm_vib.h> |
| 39 | |
| 40 | #define VIB_LDO_BASE (PMI_SECOND_SLAVE_ADDR_BASE + 0x5700) |
| 41 | #define QPNP_VIB_LDO_STATUS1_REG (VIB_LDO_BASE + 0x08) |
| 42 | #define QPNP_VIB_LDO_VSET_LB_REG (VIB_LDO_BASE + 0x40) |
| 43 | #define QPNP_VIB_LDO_VSET_UB_REG (VIB_LDO_BASE + 0x41) |
| 44 | #define QPNP_VIB_LDO_EN_CTL_REG (VIB_LDO_BASE + 0x46) |
| 45 | |
| 46 | #define QPNP_VIB_LDO_VSET_LB_MASK 0xFF |
| 47 | #define QPNP_VIB_LDO_VSET_UB_MASK 0xFF |
| 48 | #define QPNP_VIB_LDO_EN_CTL_MASK 0x80 |
| 49 | #define QPNP_VIB_LDO_EN 0x80 |
| 50 | #define QPNP_VIB_LDO_DIS 0x00 |
| 51 | |
| 52 | #define VREG_READY BIT(7) |
| 53 | |
| 54 | #define MAX_WAIT_FOR_VREG_READY_US 1000 |
| 55 | #define VREG_READY_STEP_DELAY_US 100 |
Umang Agrawal | b2e743e | 2018-04-24 17:18:50 +0530 | [diff] [blame] | 56 | #define VIB_LDO_OVERDRIVE_VOLTAGE_MV 3500 |
| 57 | #define VIB_LDO_NOMINAL_VOLTAGE_MV 3000 |
Umang Agrawal | c1fc077 | 2017-12-19 12:06:49 +0530 | [diff] [blame] | 58 | #define OVERDRIVE_TIME_US 30000 |
| 59 | |
| 60 | /* Turn on vibrator */ |
| 61 | void pm_vib_ldo_turn_on(void) |
| 62 | { |
| 63 | uint8_t status; |
| 64 | uint8_t vreg_timer_count = 0; |
| 65 | |
| 66 | if (!target_is_pmi_enabled()) |
| 67 | return; |
| 68 | |
| 69 | /* Set overdrive voltage*/ |
| 70 | pmic_spmi_reg_mask_write(QPNP_VIB_LDO_VSET_LB_REG, |
| 71 | QPNP_VIB_LDO_VSET_LB_MASK, |
| 72 | (VIB_LDO_OVERDRIVE_VOLTAGE_MV & 0xff)); |
| 73 | pmic_spmi_reg_mask_write(QPNP_VIB_LDO_VSET_UB_REG, |
| 74 | QPNP_VIB_LDO_VSET_UB_MASK, |
| 75 | ((VIB_LDO_OVERDRIVE_VOLTAGE_MV >> 8) & 0xff)); |
| 76 | |
| 77 | /* Set Register VIB_LDO_EN_CTL to enable vibrator */ |
| 78 | pmic_spmi_reg_mask_write(QPNP_VIB_LDO_EN_CTL_REG, |
| 79 | QPNP_VIB_LDO_EN_CTL_MASK, |
| 80 | QPNP_VIB_LDO_EN); |
| 81 | |
| 82 | /* Wait for VREG_READY*/ |
| 83 | while (1) { |
| 84 | status = pmic_spmi_reg_read(QPNP_VIB_LDO_STATUS1_REG); |
| 85 | if ( status & VREG_READY ) { |
| 86 | break; |
| 87 | } |
| 88 | else if ( vreg_timer_count < (MAX_WAIT_FOR_VREG_READY_US / |
| 89 | VREG_READY_STEP_DELAY_US) ) { |
| 90 | vreg_timer_count++; |
| 91 | udelay(VREG_READY_STEP_DELAY_US); |
| 92 | } |
| 93 | else { |
| 94 | dprintf(CRITICAL, "LDO failed to start in 1 msec, " |
| 95 | "turning off vibrator\n"); |
| 96 | pm_vib_ldo_turn_off(); |
| 97 | return; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | udelay(OVERDRIVE_TIME_US); |
| 102 | |
| 103 | /* Set normal voltage */ |
| 104 | pmic_spmi_reg_mask_write(QPNP_VIB_LDO_VSET_LB_REG, |
| 105 | QPNP_VIB_LDO_VSET_LB_MASK, |
| 106 | (VIB_LDO_NOMINAL_VOLTAGE_MV & 0xff)); |
| 107 | pmic_spmi_reg_mask_write(QPNP_VIB_LDO_VSET_UB_REG, |
| 108 | QPNP_VIB_LDO_VSET_UB_MASK, |
| 109 | ((VIB_LDO_NOMINAL_VOLTAGE_MV >> 8) & 0xff)); |
| 110 | |
| 111 | vreg_timer_count = 0; |
| 112 | /* Wait for VREG_READY*/ |
| 113 | while (1) { |
| 114 | status = pmic_spmi_reg_read(QPNP_VIB_LDO_STATUS1_REG); |
| 115 | if ( status & VREG_READY ) { |
| 116 | break; |
| 117 | } |
| 118 | else if ( vreg_timer_count < (MAX_WAIT_FOR_VREG_READY_US / |
| 119 | VREG_READY_STEP_DELAY_US) ) { |
| 120 | vreg_timer_count++; |
| 121 | udelay(VREG_READY_STEP_DELAY_US); |
| 122 | } |
| 123 | else { |
| 124 | dprintf(CRITICAL, "LDO failed to start in 1 msec, " |
| 125 | "turning off vibrator\n"); |
| 126 | pm_vib_ldo_turn_off(); |
| 127 | return; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | } |
| 132 | |
| 133 | /* Turn off vibrator */ |
| 134 | void pm_vib_ldo_turn_off(void) |
| 135 | { |
| 136 | if (!target_is_pmi_enabled()) |
| 137 | return; |
| 138 | |
| 139 | /* Clear Register VIB_LDO_EN_CTL to disable vibrator */ |
| 140 | pmic_spmi_reg_mask_write(QPNP_VIB_LDO_EN_CTL_REG, |
| 141 | QPNP_VIB_LDO_EN_CTL_MASK, |
| 142 | QPNP_VIB_LDO_DIS); |
| 143 | } |