Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +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, Inc. 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 <stdio.h> |
| 30 | #include <string.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <err.h> |
| 33 | #include <debug.h> |
| 34 | #include <spmi.h> |
| 35 | #include <qpnp_wled.h> |
| 36 | #include <qpnp_lcdb.h> |
| 37 | #include <qtimer.h> |
| 38 | #include <target.h> |
| 39 | |
| 40 | struct qpnp_lcdb *lcdb; |
| 41 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 42 | static int qpnp_lcdb_set_voltage(struct qpnp_lcdb *lcdb, uint32_t ldo_v, |
| 43 | uint32_t ncp_v) |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 44 | { |
| 45 | int rc = -1; |
| 46 | uint32_t new_uV, boost_ref_volt; |
| 47 | uint8_t val; |
| 48 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 49 | /* Set LDO voltage */ |
| 50 | if (ldo_v < lcdb->ldo_init_volt) { |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 51 | dprintf(CRITICAL, "qpnp_ldo_set_voltage failed, min_uV %d is " |
| 52 | "less than the minimum supported voltage %d\n", |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 53 | ldo_v, lcdb->ldo_init_volt); |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 54 | return rc; |
| 55 | } |
| 56 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 57 | val = ((ldo_v - lcdb->ldo_init_volt) + |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 58 | LDO_VREG_STEP_SIZE_UV - 1) / LDO_VREG_STEP_SIZE_UV; |
| 59 | new_uV = val * LDO_VREG_STEP_SIZE_UV + lcdb->ldo_init_volt; |
| 60 | if (new_uV > lcdb->ldo_max_volt) { |
| 61 | dprintf(CRITICAL, "qpnp_ldo_set_voltage unable to set voltage " |
| 62 | "(%d %d)\n", lcdb->ldo_min_volt, lcdb->ldo_max_volt); |
| 63 | return rc; |
| 64 | } |
| 65 | |
| 66 | /* Value adjustment as initial 1V has 100mV step and rest 50mV step */ |
| 67 | if ( val > 18 ) |
| 68 | val = val - 9; |
| 69 | else |
| 70 | val = val / 2; |
| 71 | |
| 72 | pmic_spmi_reg_mask_write(lcdb->lcdb_base + |
| 73 | QPNP_LCDB_LDO_OUTPUT_VOLTAGE_REG, |
| 74 | QPNP_LCDB_LDO_OUTPUT_VOLTAGE_MASK, val); |
| 75 | |
| 76 | udelay(2); |
| 77 | |
| 78 | /* Set NCP voltage */ |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 79 | if (ncp_v < lcdb->ncp_init_volt) { |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 80 | dprintf(CRITICAL, "qpnp_ncp_set_voltage failed, min_uV %d is " |
| 81 | "less than the minimum supported voltage %d\n", |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 82 | ncp_v, lcdb->ncp_init_volt); |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 83 | return rc; |
| 84 | } |
| 85 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 86 | val = ((ncp_v - lcdb->ncp_init_volt) + |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 87 | NCP_VREG_STEP_SIZE_UV - 1) / NCP_VREG_STEP_SIZE_UV; |
| 88 | new_uV = val * NCP_VREG_STEP_SIZE_UV + lcdb->ncp_init_volt; |
| 89 | if (new_uV > lcdb->ncp_max_volt) { |
| 90 | dprintf(CRITICAL, "qpnp_ncp_set_voltage unable to set voltage " |
| 91 | "(%d %d)\n", lcdb->ncp_min_volt, lcdb->ncp_max_volt); |
| 92 | return rc; |
| 93 | } |
| 94 | |
| 95 | /* Value adjustment as initial 1V has 100mV step and rest 50mV step */ |
| 96 | if ( val > 18 ) |
| 97 | val = val - 9; |
| 98 | else |
| 99 | val = val / 2; |
| 100 | |
| 101 | pmic_spmi_reg_mask_write(lcdb->lcdb_base + |
| 102 | QPNP_LCDB_NCP_OUTPUT_VOLTAGE_REG, |
| 103 | QPNP_LCDB_NCP_OUTPUT_VOLTAGE_MASK, val); |
| 104 | |
| 105 | udelay(2); |
| 106 | |
| 107 | /* Set Boost voltage */ |
| 108 | boost_ref_volt = ((lcdb->ldo_max_volt > lcdb->ncp_max_volt) ? |
| 109 | lcdb->ldo_max_volt : lcdb->ncp_max_volt) + |
| 110 | LCDB_BOOST_HEADROOM_VOLT_UV; |
| 111 | if (boost_ref_volt < lcdb->bst_init_volt) |
| 112 | boost_ref_volt = lcdb->bst_init_volt; |
| 113 | |
| 114 | val = ((boost_ref_volt - lcdb->bst_init_volt) + |
| 115 | BST_VREG_STEP_SIZE_UV - 1) / BST_VREG_STEP_SIZE_UV; |
| 116 | new_uV = val * BST_VREG_STEP_SIZE_UV + lcdb->bst_init_volt; |
| 117 | |
| 118 | pmic_spmi_reg_mask_write(lcdb->lcdb_base + |
| 119 | QPNP_LCDB_BST_OUTPUT_VOLTAGE_REG, |
| 120 | QPNP_LCDB_BST_OUTPUT_VOLTAGE_MASK, val); |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 125 | static int qpnp_lcdb_step_voltage(struct qpnp_lcdb *lcdb, |
| 126 | uint32_t step_start_uv) |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 127 | { |
| 128 | int rc = 0; |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 129 | uint32_t target_ldo_v, target_ncp_v, i; |
| 130 | |
| 131 | for (i = step_start_uv; i <= LCDB_LDO_MAX_VOLTAGE_UV; |
| 132 | i += LCDB_STEP_UV) { |
| 133 | target_ldo_v = min(lcdb->ldo_min_volt, i); |
| 134 | target_ncp_v = min(lcdb->ncp_min_volt, i); |
| 135 | rc = qpnp_lcdb_set_voltage(lcdb, target_ldo_v, target_ncp_v); |
| 136 | |
| 137 | if (lcdb->ldo_min_volt <= i && lcdb->ncp_min_volt <= i) |
| 138 | break; |
| 139 | |
| 140 | /* 1ms wait */ |
| 141 | mdelay(1); |
| 142 | } |
| 143 | |
| 144 | return rc; |
| 145 | } |
| 146 | |
| 147 | static int qpnp_lcdb_config(struct qpnp_lcdb *lcdb) |
| 148 | { |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 149 | uint8_t reg = 0; |
| 150 | |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 151 | if (lcdb->lcdb_pwrup_dly_ms > QPNP_LCDB_PWRUP_DLY_MAX_MS) |
| 152 | lcdb->lcdb_pwrup_dly_ms = QPNP_LCDB_PWRUP_DLY_MAX_MS; |
| 153 | |
| 154 | if (lcdb->lcdb_pwrdn_dly_ms > QPNP_LCDB_PWRDN_DLY_MAX_MS) |
| 155 | lcdb->lcdb_pwrdn_dly_ms = QPNP_LCDB_PWRDN_DLY_MAX_MS; |
| 156 | |
| 157 | reg = pmic_spmi_reg_read(lcdb->lcdb_base + |
| 158 | QPNP_LCDB_PWRUP_PWRDN_CTL_REG); |
| 159 | |
| 160 | /* Set power up delay */ |
| 161 | reg &= QPNP_LCDB_PWRUP_DLY_MASK; |
| 162 | reg |= (lcdb->lcdb_pwrup_dly_ms << LCDB_PWRUP_DLY_SHIFT); |
| 163 | |
| 164 | /* Set power down delay */ |
Ashay Jaiswal | 496c2e4 | 2018-05-23 11:50:32 +0530 | [diff] [blame] | 165 | reg &= ~(QPNP_LCDB_PWRDN_DLY_MASK); |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 166 | reg |= (lcdb->lcdb_pwrdn_dly_ms); |
| 167 | |
| 168 | pmic_spmi_reg_write(lcdb->lcdb_base + QPNP_LCDB_PWRUP_PWRDN_CTL_REG, |
| 169 | reg); |
| 170 | |
| 171 | /* Make LCDB module ready */ |
| 172 | pmic_spmi_reg_mask_write(lcdb->lcdb_base + QPNP_LCDB_MODULE_RDY_REG, |
| 173 | QPNP_LCDB_MODULE_RDY_MASK, LCDB_MODULE_RDY); |
| 174 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 175 | return 0; |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | static int qpnp_lcdb_setup(struct qpnp_lcdb *lcdb, |
| 179 | struct qpnp_wled_config_data *config) |
| 180 | { |
| 181 | lcdb->lcdb_base = QPNP_LCDB_BASE; |
| 182 | lcdb->lcdb_pwrup_dly_ms = config->pwr_up_delay; |
| 183 | lcdb->lcdb_pwrdn_dly_ms = config->pwr_down_delay; |
| 184 | lcdb->ldo_min_volt = config->lab_min_volt; |
| 185 | lcdb->ldo_max_volt = config->lab_max_volt; |
| 186 | lcdb->ldo_init_volt = LCDB_LDO_INIT_VOLTAGE_UV; |
| 187 | lcdb->ncp_min_volt = config->ibb_min_volt; |
| 188 | lcdb->ncp_max_volt = config->ibb_max_volt; |
| 189 | lcdb->ncp_init_volt = LCDB_NCP_INIT_VOLTAGE_UV; |
| 190 | lcdb->bst_init_volt = LCDB_BOOST_INIT_VOLTAGE_UV; |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
Umang Agrawal | 2e447c8 | 2018-09-11 15:00:47 +0530 | [diff] [blame] | 195 | int qpnp_lcdb_enable(bool state) |
| 196 | { |
| 197 | int rc = 0; |
| 198 | uint32_t target_ldo_v, target_ncp_v; |
| 199 | |
| 200 | if (!lcdb) { |
| 201 | dprintf(CRITICAL, "%s: lcdb is not initialized yet\n", __func__); |
| 202 | return ERROR; |
| 203 | } |
| 204 | |
| 205 | if (state) { |
| 206 | /* |
| 207 | * Set LDO/NCP voltage step wise (in steps of 500mV) as a part |
| 208 | * of SW WA to prevent loss in accuracy in ADC measurement of |
| 209 | * VBATT voltage. |
| 210 | * Set minimum of spec voltage or 4.5V. |
| 211 | */ |
| 212 | target_ldo_v = min(lcdb->ldo_min_volt, (lcdb->ldo_init_volt + |
| 213 | LCDB_STEP_UV)); |
| 214 | target_ncp_v = min(lcdb->ncp_min_volt, (lcdb->ncp_init_volt + |
| 215 | LCDB_STEP_UV)); |
| 216 | rc = qpnp_lcdb_set_voltage(lcdb, target_ldo_v, target_ncp_v); |
| 217 | |
| 218 | /* Enable LCDB */ |
| 219 | pmic_spmi_reg_mask_write(lcdb->lcdb_base + QPNP_LCDB_ENABLE_CTL_REG, |
| 220 | QPNP_LCDB_ENABLE_CTL_MASK, (state << LCDB_ENABLE_SHIFT)); |
| 221 | |
| 222 | /* Initial delay of 10ms */ |
| 223 | mdelay(10); |
| 224 | |
| 225 | /* Start voltage stepping from 5V onwards */ |
| 226 | if (lcdb->ldo_min_volt > (lcdb->ldo_init_volt + LCDB_STEP_UV) || |
| 227 | lcdb->ncp_min_volt > (lcdb->ncp_init_volt + LCDB_STEP_UV)) |
| 228 | rc = qpnp_lcdb_step_voltage(lcdb, target_ldo_v + |
| 229 | LCDB_STEP_UV); |
| 230 | } else { |
| 231 | pmic_spmi_reg_mask_write(lcdb->lcdb_base + QPNP_LCDB_ENABLE_CTL_REG, |
| 232 | QPNP_LCDB_ENABLE_CTL_MASK, (state << LCDB_ENABLE_SHIFT)); |
| 233 | } |
| 234 | |
| 235 | return rc; |
| 236 | } |
| 237 | |
Umang Agrawal | d13b5fe | 2017-12-19 12:09:31 +0530 | [diff] [blame] | 238 | int qpnp_lcdb_init(struct qpnp_wled_config_data *config) |
| 239 | { |
| 240 | int rc; |
| 241 | |
| 242 | if (!target_is_pmi_enabled()) |
| 243 | return ERR_NOT_FOUND; |
| 244 | |
| 245 | lcdb = malloc(sizeof(struct qpnp_lcdb)); |
| 246 | if (!lcdb) |
| 247 | return ERR_NO_MEMORY; |
| 248 | |
| 249 | memset(lcdb, 0, sizeof(struct qpnp_lcdb)); |
| 250 | |
| 251 | rc = qpnp_lcdb_setup(lcdb, config); |
| 252 | if(rc) { |
| 253 | dprintf(CRITICAL, "Setting LCDB parameters failed\n"); |
| 254 | return rc; |
| 255 | } |
| 256 | |
| 257 | rc = qpnp_lcdb_config(lcdb); |
| 258 | if (rc) { |
| 259 | dprintf(CRITICAL, "lcdb config failed\n"); |
| 260 | return rc; |
| 261 | } |
| 262 | |
| 263 | return rc; |
| 264 | } |