Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/moduleparam.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/errno.h> |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 19 | #include <linux/power_supply.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 20 | #include <linux/mfd/pm8xxx/pm8921-bms.h> |
| 21 | #include <linux/mfd/pm8xxx/core.h> |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 22 | #include <linux/mfd/pm8xxx/pm8xxx-adc.h> |
Abhijeet Dharmapurikar | b268013 | 2012-05-15 16:32:51 -0700 | [diff] [blame] | 23 | #include <linux/mfd/pm8xxx/pm8921-charger.h> |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 24 | #include <linux/mfd/pm8xxx/ccadc.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/bitops.h> |
| 27 | #include <linux/debugfs.h> |
| 28 | #include <linux/slab.h> |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 29 | #include <linux/delay.h> |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 30 | #include <linux/mutex.h> |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 31 | #include <linux/rtc.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 32 | |
| 33 | #define BMS_CONTROL 0x224 |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 34 | #define BMS_S1_DELAY 0x225 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 35 | #define BMS_OUTPUT0 0x230 |
| 36 | #define BMS_OUTPUT1 0x231 |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 37 | #define BMS_TOLERANCES 0x232 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 38 | #define BMS_TEST1 0x237 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 39 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 40 | #define ADC_ARB_SECP_CNTRL 0x190 |
| 41 | #define ADC_ARB_SECP_AMUX_CNTRL 0x191 |
| 42 | #define ADC_ARB_SECP_ANA_PARAM 0x192 |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 43 | #define ADC_ARB_SECP_DIG_PARAM 0x193 |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 44 | #define ADC_ARB_SECP_RSV 0x194 |
| 45 | #define ADC_ARB_SECP_DATA1 0x195 |
| 46 | #define ADC_ARB_SECP_DATA0 0x196 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 47 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 48 | #define ADC_ARB_BMS_CNTRL 0x18D |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 49 | #define AMUX_TRIM_2 0x322 |
| 50 | #define TEST_PROGRAM_REV 0x339 |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 51 | |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 52 | #define TEMP_SOC_STORAGE 0x107 |
| 53 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 54 | #define TEMP_IAVG_STORAGE 0x105 |
| 55 | #define TEMP_IAVG_STORAGE_USE_MASK 0x0F |
| 56 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 57 | enum pmic_bms_interrupts { |
| 58 | PM8921_BMS_SBI_WRITE_OK, |
| 59 | PM8921_BMS_CC_THR, |
| 60 | PM8921_BMS_VSENSE_THR, |
| 61 | PM8921_BMS_VSENSE_FOR_R, |
| 62 | PM8921_BMS_OCV_FOR_R, |
| 63 | PM8921_BMS_GOOD_OCV, |
| 64 | PM8921_BMS_VSENSE_AVG, |
| 65 | PM_BMS_MAX_INTS, |
| 66 | }; |
| 67 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 68 | struct pm8921_soc_params { |
Abhijeet Dharmapurikar | 1a7561a | 2012-02-26 22:06:36 -0800 | [diff] [blame] | 69 | uint16_t last_good_ocv_raw; |
| 70 | int cc; |
| 71 | |
| 72 | int last_good_ocv_uv; |
| 73 | }; |
| 74 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 75 | /** |
| 76 | * struct pm8921_bms_chip - |
| 77 | * @bms_output_lock: lock to prevent concurrent bms reads |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 78 | * |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 79 | * @last_ocv_uv_mutex: mutex to protect simultaneous invocations of calculate |
| 80 | * state of charge, note that last_ocv_uv could be |
| 81 | * changed as soc is adjusted. This mutex protects |
| 82 | * simultaneous updates of last_ocv_uv as well. This mutex |
| 83 | * also protects changes to *_at_100 variables used in |
| 84 | * faking 100% SOC. |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 85 | */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 86 | struct pm8921_bms_chip { |
| 87 | struct device *dev; |
| 88 | struct dentry *dent; |
| 89 | unsigned int r_sense; |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 90 | unsigned int v_cutoff; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 91 | unsigned int fcc; |
| 92 | struct single_row_lut *fcc_temp_lut; |
| 93 | struct single_row_lut *fcc_sf_lut; |
| 94 | struct pc_temp_ocv_lut *pc_temp_ocv_lut; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 95 | struct sf_lut *pc_sf_lut; |
| 96 | struct sf_lut *rbatt_sf_lut; |
Abhijeet Dharmapurikar | ded189b | 2012-03-30 10:12:28 -0700 | [diff] [blame] | 97 | int delta_rbatt_mohm; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 98 | struct work_struct calib_hkadc_work; |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 99 | struct delayed_work calib_hkadc_delayed_work; |
| 100 | struct mutex calib_mutex; |
Abhijeet Dharmapurikar | fa77f1a | 2011-06-27 21:11:51 -0700 | [diff] [blame] | 101 | unsigned int revision; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 102 | unsigned int xoadc_v0625_usb_present; |
| 103 | unsigned int xoadc_v0625_usb_absent; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 104 | unsigned int xoadc_v0625; |
| 105 | unsigned int xoadc_v125; |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 106 | unsigned int batt_temp_channel; |
| 107 | unsigned int vbat_channel; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 108 | unsigned int ref625mv_channel; |
| 109 | unsigned int ref1p25v_channel; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 110 | unsigned int batt_id_channel; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 111 | unsigned int pmic_bms_irq[PM_BMS_MAX_INTS]; |
| 112 | DECLARE_BITMAP(enabled_irqs, PM_BMS_MAX_INTS); |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 113 | struct mutex bms_output_lock; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 114 | struct single_row_lut *adjusted_fcc_temp_lut; |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 115 | unsigned int charging_began; |
| 116 | unsigned int start_percent; |
| 117 | unsigned int end_percent; |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 118 | int charge_time_us; |
| 119 | int catch_up_time_us; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 120 | enum battery_type batt_type; |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 121 | uint16_t ocv_reading_at_100; |
| 122 | int cc_reading_at_100; |
Abhijeet Dharmapurikar | a93ede8 | 2011-11-17 12:20:03 -0800 | [diff] [blame] | 123 | int max_voltage_uv; |
Abhijeet Dharmapurikar | 1a7561a | 2012-02-26 22:06:36 -0800 | [diff] [blame] | 124 | |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 125 | int chg_term_ua; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 126 | int default_rbatt_mohm; |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 127 | int amux_2_trim_delta; |
Abhijeet Dharmapurikar | b7092f1 | 2012-03-14 21:19:50 -0700 | [diff] [blame] | 128 | uint16_t prev_last_good_ocv_raw; |
Abhijeet Dharmapurikar | baffba4 | 2012-03-22 14:41:10 -0700 | [diff] [blame] | 129 | unsigned int rconn_mohm; |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 130 | struct mutex last_ocv_uv_mutex; |
| 131 | int last_ocv_uv; |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 132 | int pon_ocv_uv; |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 133 | int last_cc_uah; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 134 | unsigned long tm_sec; |
Abhijeet Dharmapurikar | e88f246 | 2012-04-25 18:22:38 -0700 | [diff] [blame] | 135 | int enable_fcc_learning; |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 136 | int shutdown_soc; |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 137 | int shutdown_iavg_ua; |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 138 | struct delayed_work calculate_soc_delayed_work; |
| 139 | struct timespec t_soc_queried; |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 140 | int shutdown_soc_valid_limit; |
Abhijeet Dharmapurikar | 1f4cc51 | 2012-07-21 00:10:39 -0700 | [diff] [blame] | 141 | int ignore_shutdown_soc; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 142 | int prev_iavg_ua; |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 143 | int prev_uuc_iavg_ma; |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 144 | int prev_pc_unusable; |
Abhijeet Dharmapurikar | 720b00e | 2012-08-01 21:33:09 -0700 | [diff] [blame] | 145 | int adjust_soc_low_threshold; |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 146 | |
| 147 | int ibat_at_cv_ua; |
| 148 | int soc_at_cv; |
| 149 | int prev_chg_soc; |
Abhijeet Dharmapurikar | 0622a43 | 2012-08-28 16:34:18 -0700 | [diff] [blame] | 150 | struct power_supply *batt_psy; |
Abhijeet Dharmapurikar | d1c761d | 2012-08-14 19:15:53 -0700 | [diff] [blame^] | 151 | bool low_voltage_wake_lock_held; |
| 152 | struct wake_lock low_voltage_wake_lock; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 153 | }; |
| 154 | |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 155 | /* |
| 156 | * protects against simultaneous adjustment of ocv based on shutdown soc and |
| 157 | * invalidating the shutdown soc |
| 158 | */ |
| 159 | static DEFINE_MUTEX(soc_invalidation_mutex); |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 160 | static int shutdown_soc_invalid; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 161 | static struct pm8921_bms_chip *the_chip; |
| 162 | |
| 163 | #define DEFAULT_RBATT_MOHMS 128 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 164 | #define DEFAULT_OCV_MICROVOLTS 3900000 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 165 | #define DEFAULT_CHARGE_CYCLES 0 |
| 166 | |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 167 | static int last_usb_cal_delta_uv = 1800; |
| 168 | module_param(last_usb_cal_delta_uv, int, 0644); |
| 169 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 170 | static int last_chargecycles = DEFAULT_CHARGE_CYCLES; |
| 171 | static int last_charge_increase; |
| 172 | module_param(last_chargecycles, int, 0644); |
| 173 | module_param(last_charge_increase, int, 0644); |
| 174 | |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 175 | static int calculated_soc = -EINVAL; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 176 | static int last_soc = -EINVAL; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 177 | static int last_real_fcc_mah = -EINVAL; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 178 | static int last_real_fcc_batt_temp = -EINVAL; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 179 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 180 | static int bms_ops_set(const char *val, const struct kernel_param *kp) |
| 181 | { |
| 182 | if (*(int *)kp->arg == -EINVAL) |
| 183 | return param_set_int(val, kp); |
| 184 | else |
| 185 | return 0; |
| 186 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 187 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 188 | static struct kernel_param_ops bms_param_ops = { |
| 189 | .set = bms_ops_set, |
| 190 | .get = param_get_int, |
| 191 | }; |
| 192 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 193 | module_param_cb(last_soc, &bms_param_ops, &last_soc, 0644); |
| 194 | |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 195 | /* |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 196 | * bms_fake_battery is set in setups where a battery emulator is used instead |
| 197 | * of a real battery. This makes the bms driver report a different/fake value |
| 198 | * regardless of the calculated state of charge. |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 199 | */ |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 200 | static int bms_fake_battery = -EINVAL; |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 201 | module_param(bms_fake_battery, int, 0644); |
| 202 | |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 203 | /* bms_start_XXX and bms_end_XXX are read only */ |
| 204 | static int bms_start_percent; |
| 205 | static int bms_start_ocv_uv; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 206 | static int bms_start_cc_uah; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 207 | static int bms_end_percent; |
| 208 | static int bms_end_ocv_uv; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 209 | static int bms_end_cc_uah; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 210 | |
| 211 | static int bms_ro_ops_set(const char *val, const struct kernel_param *kp) |
| 212 | { |
| 213 | return -EINVAL; |
| 214 | } |
| 215 | |
| 216 | static struct kernel_param_ops bms_ro_param_ops = { |
| 217 | .set = bms_ro_ops_set, |
| 218 | .get = param_get_int, |
| 219 | }; |
| 220 | module_param_cb(bms_start_percent, &bms_ro_param_ops, &bms_start_percent, 0644); |
| 221 | module_param_cb(bms_start_ocv_uv, &bms_ro_param_ops, &bms_start_ocv_uv, 0644); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 222 | module_param_cb(bms_start_cc_uah, &bms_ro_param_ops, &bms_start_cc_uah, 0644); |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 223 | |
| 224 | module_param_cb(bms_end_percent, &bms_ro_param_ops, &bms_end_percent, 0644); |
| 225 | module_param_cb(bms_end_ocv_uv, &bms_ro_param_ops, &bms_end_ocv_uv, 0644); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 226 | module_param_cb(bms_end_cc_uah, &bms_ro_param_ops, &bms_end_cc_uah, 0644); |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 227 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 228 | static int interpolate_fcc(struct pm8921_bms_chip *chip, int batt_temp); |
| 229 | static void readjust_fcc_table(void) |
| 230 | { |
| 231 | struct single_row_lut *temp, *old; |
| 232 | int i, fcc, ratio; |
| 233 | |
| 234 | if (!the_chip->fcc_temp_lut) { |
| 235 | pr_err("The static fcc lut table is NULL\n"); |
| 236 | return; |
| 237 | } |
| 238 | |
| 239 | temp = kzalloc(sizeof(struct single_row_lut), GFP_KERNEL); |
| 240 | if (!temp) { |
| 241 | pr_err("Cannot allocate memory for adjusted fcc table\n"); |
| 242 | return; |
| 243 | } |
| 244 | |
| 245 | fcc = interpolate_fcc(the_chip, last_real_fcc_batt_temp); |
| 246 | |
| 247 | temp->cols = the_chip->fcc_temp_lut->cols; |
| 248 | for (i = 0; i < the_chip->fcc_temp_lut->cols; i++) { |
| 249 | temp->x[i] = the_chip->fcc_temp_lut->x[i]; |
| 250 | ratio = div_u64(the_chip->fcc_temp_lut->y[i] * 1000, fcc); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 251 | temp->y[i] = (ratio * last_real_fcc_mah); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 252 | temp->y[i] /= 1000; |
| 253 | pr_debug("temp=%d, staticfcc=%d, adjfcc=%d, ratio=%d\n", |
| 254 | temp->x[i], the_chip->fcc_temp_lut->y[i], |
| 255 | temp->y[i], ratio); |
| 256 | } |
| 257 | |
| 258 | old = the_chip->adjusted_fcc_temp_lut; |
| 259 | the_chip->adjusted_fcc_temp_lut = temp; |
| 260 | kfree(old); |
| 261 | } |
| 262 | |
| 263 | static int bms_last_real_fcc_set(const char *val, |
| 264 | const struct kernel_param *kp) |
| 265 | { |
| 266 | int rc = 0; |
| 267 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 268 | if (last_real_fcc_mah == -EINVAL) |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 269 | rc = param_set_int(val, kp); |
| 270 | if (rc) { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 271 | pr_err("Failed to set last_real_fcc_mah rc=%d\n", rc); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 272 | return rc; |
| 273 | } |
| 274 | if (last_real_fcc_batt_temp != -EINVAL) |
| 275 | readjust_fcc_table(); |
| 276 | return rc; |
| 277 | } |
| 278 | static struct kernel_param_ops bms_last_real_fcc_param_ops = { |
| 279 | .set = bms_last_real_fcc_set, |
| 280 | .get = param_get_int, |
| 281 | }; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 282 | module_param_cb(last_real_fcc_mah, &bms_last_real_fcc_param_ops, |
| 283 | &last_real_fcc_mah, 0644); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 284 | |
| 285 | static int bms_last_real_fcc_batt_temp_set(const char *val, |
| 286 | const struct kernel_param *kp) |
| 287 | { |
| 288 | int rc = 0; |
| 289 | |
| 290 | if (last_real_fcc_batt_temp == -EINVAL) |
| 291 | rc = param_set_int(val, kp); |
| 292 | if (rc) { |
| 293 | pr_err("Failed to set last_real_fcc_batt_temp rc=%d\n", rc); |
| 294 | return rc; |
| 295 | } |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 296 | if (last_real_fcc_mah != -EINVAL) |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 297 | readjust_fcc_table(); |
| 298 | return rc; |
| 299 | } |
| 300 | |
| 301 | static struct kernel_param_ops bms_last_real_fcc_batt_temp_param_ops = { |
| 302 | .set = bms_last_real_fcc_batt_temp_set, |
| 303 | .get = param_get_int, |
| 304 | }; |
| 305 | module_param_cb(last_real_fcc_batt_temp, &bms_last_real_fcc_batt_temp_param_ops, |
| 306 | &last_real_fcc_batt_temp, 0644); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 307 | |
| 308 | static int pm_bms_get_rt_status(struct pm8921_bms_chip *chip, int irq_id) |
| 309 | { |
| 310 | return pm8xxx_read_irq_stat(chip->dev->parent, |
| 311 | chip->pmic_bms_irq[irq_id]); |
| 312 | } |
| 313 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 314 | static void pm8921_bms_enable_irq(struct pm8921_bms_chip *chip, int interrupt) |
| 315 | { |
| 316 | if (!__test_and_set_bit(interrupt, chip->enabled_irqs)) { |
| 317 | dev_dbg(chip->dev, "%s %d\n", __func__, |
| 318 | chip->pmic_bms_irq[interrupt]); |
| 319 | enable_irq(chip->pmic_bms_irq[interrupt]); |
| 320 | } |
| 321 | } |
| 322 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 323 | static void pm8921_bms_disable_irq(struct pm8921_bms_chip *chip, int interrupt) |
| 324 | { |
| 325 | if (__test_and_clear_bit(interrupt, chip->enabled_irqs)) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 326 | pr_debug("%d\n", chip->pmic_bms_irq[interrupt]); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 327 | disable_irq_nosync(chip->pmic_bms_irq[interrupt]); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | static int pm_bms_masked_write(struct pm8921_bms_chip *chip, u16 addr, |
| 332 | u8 mask, u8 val) |
| 333 | { |
| 334 | int rc; |
| 335 | u8 reg; |
| 336 | |
| 337 | rc = pm8xxx_readb(chip->dev->parent, addr, ®); |
| 338 | if (rc) { |
| 339 | pr_err("read failed addr = %03X, rc = %d\n", addr, rc); |
| 340 | return rc; |
| 341 | } |
| 342 | reg &= ~mask; |
| 343 | reg |= val & mask; |
| 344 | rc = pm8xxx_writeb(chip->dev->parent, addr, reg); |
| 345 | if (rc) { |
| 346 | pr_err("write failed addr = %03X, rc = %d\n", addr, rc); |
| 347 | return rc; |
| 348 | } |
| 349 | return 0; |
| 350 | } |
| 351 | |
Abhijeet Dharmapurikar | 9e94898 | 2012-08-28 15:21:23 -0700 | [diff] [blame] | 352 | static int usb_chg_plugged_in(struct pm8921_bms_chip *chip) |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 353 | { |
Abhijeet Dharmapurikar | 3da6176 | 2012-07-12 15:56:58 -0700 | [diff] [blame] | 354 | int val = pm8921_is_usb_chg_plugged_in(); |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 355 | |
Abhijeet Dharmapurikar | 9e94898 | 2012-08-28 15:21:23 -0700 | [diff] [blame] | 356 | /* if the charger driver was not initialized, use the restart reason */ |
| 357 | if (val == -EINVAL) { |
| 358 | if (pm8xxx_restart_reason(chip->dev->parent) |
| 359 | == PM8XXX_RESTART_CHG) |
| 360 | val = 1; |
| 361 | else |
| 362 | val = 0; |
| 363 | } |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 364 | |
Abhijeet Dharmapurikar | 3da6176 | 2012-07-12 15:56:58 -0700 | [diff] [blame] | 365 | return val; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 366 | } |
| 367 | |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 368 | #define HOLD_OREG_DATA BIT(1) |
| 369 | static int pm_bms_lock_output_data(struct pm8921_bms_chip *chip) |
| 370 | { |
| 371 | int rc; |
| 372 | |
| 373 | rc = pm_bms_masked_write(chip, BMS_CONTROL, HOLD_OREG_DATA, |
| 374 | HOLD_OREG_DATA); |
| 375 | if (rc) { |
| 376 | pr_err("couldnt lock bms output rc = %d\n", rc); |
| 377 | return rc; |
| 378 | } |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static int pm_bms_unlock_output_data(struct pm8921_bms_chip *chip) |
| 383 | { |
| 384 | int rc; |
| 385 | |
| 386 | rc = pm_bms_masked_write(chip, BMS_CONTROL, HOLD_OREG_DATA, 0); |
| 387 | if (rc) { |
| 388 | pr_err("fail to unlock BMS_CONTROL rc = %d\n", rc); |
| 389 | return rc; |
| 390 | } |
| 391 | return 0; |
| 392 | } |
| 393 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 394 | #define SELECT_OUTPUT_DATA 0x1C |
| 395 | #define SELECT_OUTPUT_TYPE_SHIFT 2 |
| 396 | #define OCV_FOR_RBATT 0x0 |
| 397 | #define VSENSE_FOR_RBATT 0x1 |
| 398 | #define VBATT_FOR_RBATT 0x2 |
| 399 | #define CC_MSB 0x3 |
| 400 | #define CC_LSB 0x4 |
| 401 | #define LAST_GOOD_OCV_VALUE 0x5 |
| 402 | #define VSENSE_AVG 0x6 |
| 403 | #define VBATT_AVG 0x7 |
| 404 | |
| 405 | static int pm_bms_read_output_data(struct pm8921_bms_chip *chip, int type, |
| 406 | int16_t *result) |
| 407 | { |
| 408 | int rc; |
| 409 | u8 reg; |
| 410 | |
| 411 | if (!result) { |
| 412 | pr_err("result pointer null\n"); |
| 413 | return -EINVAL; |
| 414 | } |
| 415 | *result = 0; |
| 416 | if (type < OCV_FOR_RBATT || type > VBATT_AVG) { |
| 417 | pr_err("invalid type %d asked to read\n", type); |
| 418 | return -EINVAL; |
| 419 | } |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 420 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 421 | rc = pm_bms_masked_write(chip, BMS_CONTROL, SELECT_OUTPUT_DATA, |
| 422 | type << SELECT_OUTPUT_TYPE_SHIFT); |
| 423 | if (rc) { |
| 424 | pr_err("fail to select %d type in BMS_CONTROL rc = %d\n", |
| 425 | type, rc); |
| 426 | return rc; |
| 427 | } |
| 428 | |
| 429 | rc = pm8xxx_readb(chip->dev->parent, BMS_OUTPUT0, ®); |
| 430 | if (rc) { |
| 431 | pr_err("fail to read BMS_OUTPUT0 for type %d rc = %d\n", |
| 432 | type, rc); |
| 433 | return rc; |
| 434 | } |
| 435 | *result = reg; |
| 436 | rc = pm8xxx_readb(chip->dev->parent, BMS_OUTPUT1, ®); |
| 437 | if (rc) { |
| 438 | pr_err("fail to read BMS_OUTPUT1 for type %d rc = %d\n", |
| 439 | type, rc); |
| 440 | return rc; |
| 441 | } |
| 442 | *result |= reg << 8; |
| 443 | pr_debug("type %d result %x", type, *result); |
| 444 | return 0; |
| 445 | } |
| 446 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 447 | #define V_PER_BIT_MUL_FACTOR 97656 |
| 448 | #define V_PER_BIT_DIV_FACTOR 1000 |
| 449 | #define XOADC_INTRINSIC_OFFSET 0x6000 |
| 450 | static int xoadc_reading_to_microvolt(unsigned int a) |
Abhijeet Dharmapurikar | d76311f | 2011-07-19 13:35:01 -0700 | [diff] [blame] | 451 | { |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 452 | if (a <= XOADC_INTRINSIC_OFFSET) |
Abhijeet Dharmapurikar | d76311f | 2011-07-19 13:35:01 -0700 | [diff] [blame] | 453 | return 0; |
| 454 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 455 | return (a - XOADC_INTRINSIC_OFFSET) |
| 456 | * V_PER_BIT_MUL_FACTOR / V_PER_BIT_DIV_FACTOR; |
Abhijeet Dharmapurikar | d76311f | 2011-07-19 13:35:01 -0700 | [diff] [blame] | 457 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 458 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 459 | #define XOADC_CALIB_UV 625000 |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 460 | #define VBATT_MUL_FACTOR 3 |
| 461 | static int adjust_xo_vbatt_reading(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 462 | int usb_chg, unsigned int uv) |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 463 | { |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 464 | s64 numerator, denominator; |
| 465 | int local_delta; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 466 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 467 | if (uv == 0) |
| 468 | return 0; |
| 469 | |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 470 | /* dont adjust if not calibrated */ |
| 471 | if (chip->xoadc_v0625 == 0 || chip->xoadc_v125 == 0) { |
| 472 | pr_debug("No cal yet return %d\n", VBATT_MUL_FACTOR * uv); |
| 473 | return VBATT_MUL_FACTOR * uv; |
| 474 | } |
| 475 | |
| 476 | if (usb_chg) |
| 477 | local_delta = last_usb_cal_delta_uv; |
| 478 | else |
| 479 | local_delta = 0; |
| 480 | |
| 481 | pr_debug("using delta = %d\n", local_delta); |
| 482 | numerator = ((s64)uv - chip->xoadc_v0625 - local_delta) |
| 483 | * XOADC_CALIB_UV; |
| 484 | denominator = (s64)chip->xoadc_v125 - chip->xoadc_v0625 - local_delta; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 485 | if (denominator == 0) |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 486 | return uv * VBATT_MUL_FACTOR; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 487 | return (XOADC_CALIB_UV + local_delta + div_s64(numerator, denominator)) |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 488 | * VBATT_MUL_FACTOR; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 489 | } |
| 490 | |
Abhijeet Dharmapurikar | 5adb253 | 2012-06-21 16:15:43 -0700 | [diff] [blame] | 491 | #define CC_RESOLUTION_N 868056 |
| 492 | #define CC_RESOLUTION_D 10000 |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 493 | |
| 494 | static s64 cc_to_microvolt(struct pm8921_bms_chip *chip, s64 cc) |
| 495 | { |
Abhijeet Dharmapurikar | 5adb253 | 2012-06-21 16:15:43 -0700 | [diff] [blame] | 496 | return div_s64(cc * CC_RESOLUTION_N, CC_RESOLUTION_D); |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Abhijeet Dharmapurikar | 2feabe3 | 2012-07-23 21:42:17 -0700 | [diff] [blame] | 499 | #define CC_READING_TICKS 56 |
| 500 | #define SLEEP_CLK_HZ 32764 |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 501 | #define SECONDS_PER_HOUR 3600 |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 502 | /** |
| 503 | * ccmicrovolt_to_nvh - |
| 504 | * @cc_uv: coulumb counter converted to uV |
| 505 | * |
| 506 | * RETURNS: coulumb counter based charge in nVh |
| 507 | * (nano Volt Hour) |
| 508 | */ |
| 509 | static s64 ccmicrovolt_to_nvh(s64 cc_uv) |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 510 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 511 | return div_s64(cc_uv * CC_READING_TICKS * 1000, |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 512 | SLEEP_CLK_HZ * SECONDS_PER_HOUR); |
| 513 | } |
| 514 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 515 | /* returns the signed value read from the hardware */ |
| 516 | static int read_cc(struct pm8921_bms_chip *chip, int *result) |
| 517 | { |
| 518 | int rc; |
| 519 | uint16_t msw, lsw; |
| 520 | |
| 521 | rc = pm_bms_read_output_data(chip, CC_LSB, &lsw); |
| 522 | if (rc) { |
| 523 | pr_err("fail to read CC_LSB rc = %d\n", rc); |
| 524 | return rc; |
| 525 | } |
| 526 | rc = pm_bms_read_output_data(chip, CC_MSB, &msw); |
| 527 | if (rc) { |
| 528 | pr_err("fail to read CC_MSB rc = %d\n", rc); |
| 529 | return rc; |
| 530 | } |
| 531 | *result = msw << 16 | lsw; |
| 532 | pr_debug("msw = %04x lsw = %04x cc = %d\n", msw, lsw, *result); |
| 533 | return 0; |
| 534 | } |
| 535 | |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 536 | static int adjust_xo_vbatt_reading_for_mbg(struct pm8921_bms_chip *chip, |
| 537 | int result) |
| 538 | { |
| 539 | int64_t numerator; |
| 540 | int64_t denominator; |
| 541 | |
| 542 | if (chip->amux_2_trim_delta == 0) |
| 543 | return result; |
| 544 | |
| 545 | numerator = (s64)result * 1000000; |
| 546 | denominator = (1000000 + (410 * (s64)chip->amux_2_trim_delta)); |
| 547 | return div_s64(numerator, denominator); |
| 548 | } |
| 549 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 550 | static int convert_vbatt_raw_to_uv(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 551 | int usb_chg, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 552 | uint16_t reading, int *result) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 553 | { |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 554 | *result = xoadc_reading_to_microvolt(reading); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 555 | pr_debug("raw = %04x vbatt = %u\n", reading, *result); |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 556 | *result = adjust_xo_vbatt_reading(chip, usb_chg, *result); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 557 | pr_debug("after adj vbatt = %u\n", *result); |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 558 | *result = adjust_xo_vbatt_reading_for_mbg(chip, *result); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 559 | return 0; |
| 560 | } |
| 561 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 562 | static int convert_vsense_to_uv(struct pm8921_bms_chip *chip, |
| 563 | int16_t reading, int *result) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 564 | { |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 565 | *result = pm8xxx_ccadc_reading_to_microvolt(chip->revision, reading); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 566 | pr_debug("raw = %04x vsense = %d\n", reading, *result); |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 567 | *result = pm8xxx_cc_adjust_for_gain(*result); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 568 | pr_debug("after adj vsense = %d\n", *result); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 569 | return 0; |
| 570 | } |
| 571 | |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 572 | static int read_vsense_avg(struct pm8921_bms_chip *chip, int *result) |
| 573 | { |
| 574 | int rc; |
| 575 | int16_t reading; |
| 576 | |
| 577 | rc = pm_bms_read_output_data(chip, VSENSE_AVG, &reading); |
| 578 | if (rc) { |
| 579 | pr_err("fail to read VSENSE_AVG rc = %d\n", rc); |
| 580 | return rc; |
| 581 | } |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 582 | |
| 583 | convert_vsense_to_uv(chip, reading, result); |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 584 | return 0; |
| 585 | } |
| 586 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 587 | static int linear_interpolate(int y0, int x0, int y1, int x1, int x) |
| 588 | { |
| 589 | if (y0 == y1 || x == x0) |
| 590 | return y0; |
| 591 | if (x1 == x0 || x == x1) |
| 592 | return y1; |
| 593 | |
| 594 | return y0 + ((y1 - y0) * (x - x0) / (x1 - x0)); |
| 595 | } |
| 596 | |
| 597 | static int interpolate_single_lut(struct single_row_lut *lut, int x) |
| 598 | { |
| 599 | int i, result; |
| 600 | |
| 601 | if (x < lut->x[0]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 602 | pr_debug("x %d less than known range return y = %d lut = %pS\n", |
| 603 | x, lut->y[0], lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 604 | return lut->y[0]; |
| 605 | } |
| 606 | if (x > lut->x[lut->cols - 1]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 607 | pr_debug("x %d more than known range return y = %d lut = %pS\n", |
| 608 | x, lut->y[lut->cols - 1], lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 609 | return lut->y[lut->cols - 1]; |
| 610 | } |
| 611 | |
| 612 | for (i = 0; i < lut->cols; i++) |
| 613 | if (x <= lut->x[i]) |
| 614 | break; |
| 615 | if (x == lut->x[i]) { |
| 616 | result = lut->y[i]; |
| 617 | } else { |
| 618 | result = linear_interpolate( |
| 619 | lut->y[i - 1], |
| 620 | lut->x[i - 1], |
| 621 | lut->y[i], |
| 622 | lut->x[i], |
| 623 | x); |
| 624 | } |
| 625 | return result; |
| 626 | } |
| 627 | |
| 628 | static int interpolate_fcc(struct pm8921_bms_chip *chip, int batt_temp) |
| 629 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 630 | /* batt_temp is in tenths of degC - convert it to degC for lookups */ |
| 631 | batt_temp = batt_temp/10; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 632 | return interpolate_single_lut(chip->fcc_temp_lut, batt_temp); |
| 633 | } |
| 634 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 635 | static int interpolate_fcc_adjusted(struct pm8921_bms_chip *chip, int batt_temp) |
| 636 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 637 | /* batt_temp is in tenths of degC - convert it to degC for lookups */ |
| 638 | batt_temp = batt_temp/10; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 639 | return interpolate_single_lut(chip->adjusted_fcc_temp_lut, batt_temp); |
| 640 | } |
| 641 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 642 | static int interpolate_scalingfactor_fcc(struct pm8921_bms_chip *chip, |
| 643 | int cycles) |
| 644 | { |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 645 | /* |
| 646 | * sf table could be null when no battery aging data is available, in |
| 647 | * that case return 100% |
| 648 | */ |
| 649 | if (chip->fcc_sf_lut) |
| 650 | return interpolate_single_lut(chip->fcc_sf_lut, cycles); |
| 651 | else |
| 652 | return 100; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 653 | } |
| 654 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 655 | static int interpolate_scalingfactor(struct pm8921_bms_chip *chip, |
| 656 | struct sf_lut *sf_lut, |
| 657 | int row_entry, int pc) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 658 | { |
Abhijeet Dharmapurikar | 4a4456e | 2011-09-27 15:10:38 -0700 | [diff] [blame] | 659 | int i, scalefactorrow1, scalefactorrow2, scalefactor; |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 660 | int rows, cols; |
Abhijeet Dharmapurikar | 4a4456e | 2011-09-27 15:10:38 -0700 | [diff] [blame] | 661 | int row1 = 0; |
| 662 | int row2 = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 663 | |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 664 | /* |
| 665 | * sf table could be null when no battery aging data is available, in |
| 666 | * that case return 100% |
| 667 | */ |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 668 | if (!sf_lut) |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 669 | return 100; |
| 670 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 671 | rows = sf_lut->rows; |
| 672 | cols = sf_lut->cols; |
| 673 | if (pc > sf_lut->percent[0]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 674 | pr_debug("pc %d greater than known pc ranges for sfd\n", pc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 675 | row1 = 0; |
| 676 | row2 = 0; |
| 677 | } |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 678 | if (pc < sf_lut->percent[rows - 1]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 679 | pr_debug("pc %d less than known pc ranges for sf", pc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 680 | row1 = rows - 1; |
| 681 | row2 = rows - 1; |
| 682 | } |
| 683 | for (i = 0; i < rows; i++) { |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 684 | if (pc == sf_lut->percent[i]) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 685 | row1 = i; |
| 686 | row2 = i; |
| 687 | break; |
| 688 | } |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 689 | if (pc > sf_lut->percent[i]) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 690 | row1 = i - 1; |
| 691 | row2 = i; |
| 692 | break; |
| 693 | } |
| 694 | } |
| 695 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 696 | if (row_entry < sf_lut->row_entries[0]) |
| 697 | row_entry = sf_lut->row_entries[0]; |
| 698 | if (row_entry > sf_lut->row_entries[cols - 1]) |
| 699 | row_entry = sf_lut->row_entries[cols - 1]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 700 | |
| 701 | for (i = 0; i < cols; i++) |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 702 | if (row_entry <= sf_lut->row_entries[i]) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 703 | break; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 704 | if (row_entry == sf_lut->row_entries[i]) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 705 | scalefactor = linear_interpolate( |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 706 | sf_lut->sf[row1][i], |
| 707 | sf_lut->percent[row1], |
| 708 | sf_lut->sf[row2][i], |
| 709 | sf_lut->percent[row2], |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 710 | pc); |
| 711 | return scalefactor; |
| 712 | } |
| 713 | |
| 714 | scalefactorrow1 = linear_interpolate( |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 715 | sf_lut->sf[row1][i - 1], |
| 716 | sf_lut->row_entries[i - 1], |
| 717 | sf_lut->sf[row1][i], |
| 718 | sf_lut->row_entries[i], |
| 719 | row_entry); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 720 | |
| 721 | scalefactorrow2 = linear_interpolate( |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 722 | sf_lut->sf[row2][i - 1], |
| 723 | sf_lut->row_entries[i - 1], |
| 724 | sf_lut->sf[row2][i], |
| 725 | sf_lut->row_entries[i], |
| 726 | row_entry); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 727 | |
| 728 | scalefactor = linear_interpolate( |
| 729 | scalefactorrow1, |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 730 | sf_lut->percent[row1], |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 731 | scalefactorrow2, |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 732 | sf_lut->percent[row2], |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 733 | pc); |
| 734 | |
| 735 | return scalefactor; |
| 736 | } |
| 737 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 738 | static int is_between(int left, int right, int value) |
| 739 | { |
| 740 | if (left >= right && left >= value && value >= right) |
| 741 | return 1; |
| 742 | if (left <= right && left <= value && value <= right) |
| 743 | return 1; |
| 744 | |
| 745 | return 0; |
| 746 | } |
| 747 | |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 748 | /* get ocv given a soc -- reverse lookup */ |
| 749 | static int interpolate_ocv(struct pm8921_bms_chip *chip, |
| 750 | int batt_temp_degc, int pc) |
| 751 | { |
| 752 | int i, ocvrow1, ocvrow2, ocv; |
| 753 | int rows, cols; |
| 754 | int row1 = 0; |
| 755 | int row2 = 0; |
| 756 | |
| 757 | rows = chip->pc_temp_ocv_lut->rows; |
| 758 | cols = chip->pc_temp_ocv_lut->cols; |
| 759 | if (pc > chip->pc_temp_ocv_lut->percent[0]) { |
| 760 | pr_debug("pc %d greater than known pc ranges for sfd\n", pc); |
| 761 | row1 = 0; |
| 762 | row2 = 0; |
| 763 | } |
| 764 | if (pc < chip->pc_temp_ocv_lut->percent[rows - 1]) { |
| 765 | pr_debug("pc %d less than known pc ranges for sf\n", pc); |
| 766 | row1 = rows - 1; |
| 767 | row2 = rows - 1; |
| 768 | } |
| 769 | for (i = 0; i < rows; i++) { |
| 770 | if (pc == chip->pc_temp_ocv_lut->percent[i]) { |
| 771 | row1 = i; |
| 772 | row2 = i; |
| 773 | break; |
| 774 | } |
| 775 | if (pc > chip->pc_temp_ocv_lut->percent[i]) { |
| 776 | row1 = i - 1; |
| 777 | row2 = i; |
| 778 | break; |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | if (batt_temp_degc < chip->pc_temp_ocv_lut->temp[0]) |
| 783 | batt_temp_degc = chip->pc_temp_ocv_lut->temp[0]; |
| 784 | if (batt_temp_degc > chip->pc_temp_ocv_lut->temp[cols - 1]) |
| 785 | batt_temp_degc = chip->pc_temp_ocv_lut->temp[cols - 1]; |
| 786 | |
| 787 | for (i = 0; i < cols; i++) |
| 788 | if (batt_temp_degc <= chip->pc_temp_ocv_lut->temp[i]) |
| 789 | break; |
| 790 | if (batt_temp_degc == chip->pc_temp_ocv_lut->temp[i]) { |
| 791 | ocv = linear_interpolate( |
| 792 | chip->pc_temp_ocv_lut->ocv[row1][i], |
| 793 | chip->pc_temp_ocv_lut->percent[row1], |
| 794 | chip->pc_temp_ocv_lut->ocv[row2][i], |
| 795 | chip->pc_temp_ocv_lut->percent[row2], |
| 796 | pc); |
| 797 | return ocv; |
| 798 | } |
| 799 | |
| 800 | ocvrow1 = linear_interpolate( |
| 801 | chip->pc_temp_ocv_lut->ocv[row1][i - 1], |
| 802 | chip->pc_temp_ocv_lut->temp[i - 1], |
| 803 | chip->pc_temp_ocv_lut->ocv[row1][i], |
| 804 | chip->pc_temp_ocv_lut->temp[i], |
| 805 | batt_temp_degc); |
| 806 | |
| 807 | ocvrow2 = linear_interpolate( |
| 808 | chip->pc_temp_ocv_lut->ocv[row2][i - 1], |
| 809 | chip->pc_temp_ocv_lut->temp[i - 1], |
| 810 | chip->pc_temp_ocv_lut->ocv[row2][i], |
| 811 | chip->pc_temp_ocv_lut->temp[i], |
| 812 | batt_temp_degc); |
| 813 | |
| 814 | ocv = linear_interpolate( |
| 815 | ocvrow1, |
| 816 | chip->pc_temp_ocv_lut->percent[row1], |
| 817 | ocvrow2, |
| 818 | chip->pc_temp_ocv_lut->percent[row2], |
| 819 | pc); |
| 820 | |
| 821 | return ocv; |
| 822 | } |
| 823 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 824 | static int interpolate_pc(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 825 | int batt_temp_degc, int ocv) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 826 | { |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 827 | int i, j, pcj, pcj_minus_one, pc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 828 | int rows = chip->pc_temp_ocv_lut->rows; |
| 829 | int cols = chip->pc_temp_ocv_lut->cols; |
| 830 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 831 | |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 832 | if (batt_temp_degc < chip->pc_temp_ocv_lut->temp[0]) { |
| 833 | pr_debug("batt_temp %d < known temp range\n", batt_temp_degc); |
| 834 | batt_temp_degc = chip->pc_temp_ocv_lut->temp[0]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 835 | } |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 836 | if (batt_temp_degc > chip->pc_temp_ocv_lut->temp[cols - 1]) { |
| 837 | pr_debug("batt_temp %d > known temp range\n", batt_temp_degc); |
| 838 | batt_temp_degc = chip->pc_temp_ocv_lut->temp[cols - 1]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 839 | } |
| 840 | |
| 841 | for (j = 0; j < cols; j++) |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 842 | if (batt_temp_degc <= chip->pc_temp_ocv_lut->temp[j]) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 843 | break; |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 844 | if (batt_temp_degc == chip->pc_temp_ocv_lut->temp[j]) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 845 | /* found an exact match for temp in the table */ |
| 846 | if (ocv >= chip->pc_temp_ocv_lut->ocv[0][j]) |
| 847 | return chip->pc_temp_ocv_lut->percent[0]; |
| 848 | if (ocv <= chip->pc_temp_ocv_lut->ocv[rows - 1][j]) |
| 849 | return chip->pc_temp_ocv_lut->percent[rows - 1]; |
| 850 | for (i = 0; i < rows; i++) { |
| 851 | if (ocv >= chip->pc_temp_ocv_lut->ocv[i][j]) { |
| 852 | if (ocv == chip->pc_temp_ocv_lut->ocv[i][j]) |
| 853 | return |
| 854 | chip->pc_temp_ocv_lut->percent[i]; |
| 855 | pc = linear_interpolate( |
| 856 | chip->pc_temp_ocv_lut->percent[i], |
| 857 | chip->pc_temp_ocv_lut->ocv[i][j], |
| 858 | chip->pc_temp_ocv_lut->percent[i - 1], |
| 859 | chip->pc_temp_ocv_lut->ocv[i - 1][j], |
| 860 | ocv); |
| 861 | return pc; |
| 862 | } |
| 863 | } |
| 864 | } |
| 865 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 866 | /* |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 867 | * batt_temp_degc is within temperature for |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 868 | * column j-1 and j |
| 869 | */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 870 | if (ocv >= chip->pc_temp_ocv_lut->ocv[0][j]) |
| 871 | return chip->pc_temp_ocv_lut->percent[0]; |
| 872 | if (ocv <= chip->pc_temp_ocv_lut->ocv[rows - 1][j - 1]) |
| 873 | return chip->pc_temp_ocv_lut->percent[rows - 1]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 874 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 875 | pcj_minus_one = 0; |
| 876 | pcj = 0; |
| 877 | for (i = 0; i < rows-1; i++) { |
| 878 | if (pcj == 0 |
| 879 | && is_between(chip->pc_temp_ocv_lut->ocv[i][j], |
| 880 | chip->pc_temp_ocv_lut->ocv[i+1][j], ocv)) { |
| 881 | pcj = linear_interpolate( |
| 882 | chip->pc_temp_ocv_lut->percent[i], |
| 883 | chip->pc_temp_ocv_lut->ocv[i][j], |
| 884 | chip->pc_temp_ocv_lut->percent[i + 1], |
| 885 | chip->pc_temp_ocv_lut->ocv[i+1][j], |
| 886 | ocv); |
| 887 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 888 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 889 | if (pcj_minus_one == 0 |
| 890 | && is_between(chip->pc_temp_ocv_lut->ocv[i][j-1], |
| 891 | chip->pc_temp_ocv_lut->ocv[i+1][j-1], ocv)) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 892 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 893 | pcj_minus_one = linear_interpolate( |
| 894 | chip->pc_temp_ocv_lut->percent[i], |
| 895 | chip->pc_temp_ocv_lut->ocv[i][j-1], |
| 896 | chip->pc_temp_ocv_lut->percent[i + 1], |
| 897 | chip->pc_temp_ocv_lut->ocv[i+1][j-1], |
| 898 | ocv); |
| 899 | } |
| 900 | |
| 901 | if (pcj && pcj_minus_one) { |
| 902 | pc = linear_interpolate( |
| 903 | pcj_minus_one, |
| 904 | chip->pc_temp_ocv_lut->temp[j-1], |
| 905 | pcj, |
| 906 | chip->pc_temp_ocv_lut->temp[j], |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 907 | batt_temp_degc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 908 | return pc; |
| 909 | } |
| 910 | } |
| 911 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 912 | if (pcj) |
| 913 | return pcj; |
| 914 | |
| 915 | if (pcj_minus_one) |
| 916 | return pcj_minus_one; |
| 917 | |
| 918 | pr_debug("%d ocv wasn't found for temp %d in the LUT returning 100%%", |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 919 | ocv, batt_temp_degc); |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 920 | return 100; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 921 | } |
| 922 | |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 923 | #define BMS_MODE_BIT BIT(6) |
| 924 | #define EN_VBAT_BIT BIT(5) |
| 925 | #define OVERRIDE_MODE_DELAY_MS 20 |
Abhijeet Dharmapurikar | b268013 | 2012-05-15 16:32:51 -0700 | [diff] [blame] | 926 | int override_mode_simultaneous_battery_voltage_and_current(int *ibat_ua, |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 927 | int *vbat_uv) |
| 928 | { |
| 929 | int16_t vsense_raw; |
| 930 | int16_t vbat_raw; |
| 931 | int vsense_uv; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 932 | int usb_chg; |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 933 | |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 934 | mutex_lock(&the_chip->bms_output_lock); |
| 935 | |
| 936 | pm8xxx_writeb(the_chip->dev->parent, BMS_S1_DELAY, 0x00); |
| 937 | pm_bms_masked_write(the_chip, BMS_CONTROL, |
| 938 | BMS_MODE_BIT | EN_VBAT_BIT, BMS_MODE_BIT | EN_VBAT_BIT); |
| 939 | |
| 940 | msleep(OVERRIDE_MODE_DELAY_MS); |
| 941 | |
| 942 | pm_bms_lock_output_data(the_chip); |
| 943 | pm_bms_read_output_data(the_chip, VSENSE_AVG, &vsense_raw); |
| 944 | pm_bms_read_output_data(the_chip, VBATT_AVG, &vbat_raw); |
| 945 | pm_bms_unlock_output_data(the_chip); |
| 946 | pm_bms_masked_write(the_chip, BMS_CONTROL, |
| 947 | BMS_MODE_BIT | EN_VBAT_BIT, 0); |
| 948 | |
| 949 | pm8xxx_writeb(the_chip->dev->parent, BMS_S1_DELAY, 0x0B); |
| 950 | |
| 951 | mutex_unlock(&the_chip->bms_output_lock); |
| 952 | |
Abhijeet Dharmapurikar | 9e94898 | 2012-08-28 15:21:23 -0700 | [diff] [blame] | 953 | usb_chg = usb_chg_plugged_in(the_chip); |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 954 | |
| 955 | convert_vbatt_raw_to_uv(the_chip, usb_chg, vbat_raw, vbat_uv); |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 956 | convert_vsense_to_uv(the_chip, vsense_raw, &vsense_uv); |
| 957 | *ibat_ua = vsense_uv * 1000 / (int)the_chip->r_sense; |
| 958 | |
| 959 | pr_debug("vsense_raw = 0x%x vbat_raw = 0x%x" |
| 960 | " ibat_ua = %d vbat_uv = %d\n", |
| 961 | (uint16_t)vsense_raw, (uint16_t)vbat_raw, |
| 962 | *ibat_ua, *vbat_uv); |
| 963 | return 0; |
| 964 | } |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 965 | |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 966 | #define MBG_TRANSIENT_ERROR_RAW 51 |
| 967 | static void adjust_pon_ocv_raw(struct pm8921_bms_chip *chip, |
| 968 | struct pm8921_soc_params *raw) |
| 969 | { |
| 970 | /* in 8921 parts the PON ocv is taken when the MBG is not settled. |
| 971 | * decrease the pon ocv by 15mV raw value to account for it |
| 972 | * Since a 1/3rd of vbatt is supplied to the adc the raw value |
| 973 | * needs to be adjusted by 5mV worth bits |
| 974 | */ |
| 975 | if (raw->last_good_ocv_raw >= MBG_TRANSIENT_ERROR_RAW) |
| 976 | raw->last_good_ocv_raw -= MBG_TRANSIENT_ERROR_RAW; |
| 977 | } |
| 978 | |
Abhijeet Dharmapurikar | 1a7561a | 2012-02-26 22:06:36 -0800 | [diff] [blame] | 979 | static int read_soc_params_raw(struct pm8921_bms_chip *chip, |
| 980 | struct pm8921_soc_params *raw) |
| 981 | { |
| 982 | int usb_chg; |
| 983 | |
| 984 | mutex_lock(&chip->bms_output_lock); |
| 985 | pm_bms_lock_output_data(chip); |
| 986 | |
| 987 | pm_bms_read_output_data(chip, |
| 988 | LAST_GOOD_OCV_VALUE, &raw->last_good_ocv_raw); |
| 989 | read_cc(chip, &raw->cc); |
| 990 | |
| 991 | pm_bms_unlock_output_data(chip); |
| 992 | mutex_unlock(&chip->bms_output_lock); |
| 993 | |
Abhijeet Dharmapurikar | 9e94898 | 2012-08-28 15:21:23 -0700 | [diff] [blame] | 994 | usb_chg = usb_chg_plugged_in(chip); |
Abhijeet Dharmapurikar | b7092f1 | 2012-03-14 21:19:50 -0700 | [diff] [blame] | 995 | |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 996 | if (chip->prev_last_good_ocv_raw == 0) { |
| 997 | chip->prev_last_good_ocv_raw = raw->last_good_ocv_raw; |
| 998 | adjust_pon_ocv_raw(chip, raw); |
| 999 | convert_vbatt_raw_to_uv(chip, usb_chg, |
| 1000 | raw->last_good_ocv_raw, &raw->last_good_ocv_uv); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1001 | chip->last_ocv_uv = raw->last_good_ocv_uv; |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 1002 | pr_debug("PON_OCV_UV = %d\n", chip->last_ocv_uv); |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 1003 | } else if (chip->prev_last_good_ocv_raw != raw->last_good_ocv_raw) { |
Abhijeet Dharmapurikar | b7092f1 | 2012-03-14 21:19:50 -0700 | [diff] [blame] | 1004 | chip->prev_last_good_ocv_raw = raw->last_good_ocv_raw; |
| 1005 | convert_vbatt_raw_to_uv(chip, usb_chg, |
Abhijeet Dharmapurikar | 1a7561a | 2012-02-26 22:06:36 -0800 | [diff] [blame] | 1006 | raw->last_good_ocv_raw, &raw->last_good_ocv_uv); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1007 | chip->last_ocv_uv = raw->last_good_ocv_uv; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1008 | /* forget the old cc value upon ocv */ |
| 1009 | chip->last_cc_uah = 0; |
Abhijeet Dharmapurikar | b7092f1 | 2012-03-14 21:19:50 -0700 | [diff] [blame] | 1010 | } else { |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1011 | raw->last_good_ocv_uv = chip->last_ocv_uv; |
Abhijeet Dharmapurikar | b7092f1 | 2012-03-14 21:19:50 -0700 | [diff] [blame] | 1012 | } |
Abhijeet Dharmapurikar | 1a7561a | 2012-02-26 22:06:36 -0800 | [diff] [blame] | 1013 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1014 | /* fake a high OCV if we are just done charging */ |
| 1015 | if (chip->ocv_reading_at_100 != raw->last_good_ocv_raw) { |
| 1016 | chip->ocv_reading_at_100 = 0; |
| 1017 | chip->cc_reading_at_100 = 0; |
| 1018 | } else { |
| 1019 | /* |
| 1020 | * force 100% ocv by selecting the highest voltage the |
| 1021 | * battery could ever reach |
| 1022 | */ |
| 1023 | raw->last_good_ocv_uv = chip->max_voltage_uv; |
| 1024 | chip->last_ocv_uv = chip->max_voltage_uv; |
| 1025 | } |
Abhijeet Dharmapurikar | 1a7561a | 2012-02-26 22:06:36 -0800 | [diff] [blame] | 1026 | pr_debug("0p625 = %duV\n", chip->xoadc_v0625); |
| 1027 | pr_debug("1p25 = %duV\n", chip->xoadc_v125); |
Abhijeet Dharmapurikar | 1b8e829 | 2012-01-17 11:01:44 -0800 | [diff] [blame] | 1028 | pr_debug("last_good_ocv_raw= 0x%x, last_good_ocv_uv= %duV\n", |
| 1029 | raw->last_good_ocv_raw, raw->last_good_ocv_uv); |
| 1030 | pr_debug("cc_raw= 0x%x\n", raw->cc); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1031 | return 0; |
| 1032 | } |
| 1033 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1034 | static int get_rbatt(struct pm8921_bms_chip *chip, int soc_rbatt, int batt_temp) |
| 1035 | { |
| 1036 | int rbatt, scalefactor; |
| 1037 | |
Abhijeet Dharmapurikar | 0711c52 | 2012-05-22 18:45:25 -0700 | [diff] [blame] | 1038 | rbatt = chip->default_rbatt_mohm; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1039 | pr_debug("rbatt before scaling = %d\n", rbatt); |
| 1040 | if (chip->rbatt_sf_lut == NULL) { |
| 1041 | pr_debug("RBATT = %d\n", rbatt); |
| 1042 | return rbatt; |
| 1043 | } |
Abhijeet Dharmapurikar | 12a891c | 2012-04-12 23:52:06 -0700 | [diff] [blame] | 1044 | /* Convert the batt_temp to DegC from deciDegC */ |
| 1045 | batt_temp = batt_temp / 10; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1046 | scalefactor = interpolate_scalingfactor(chip, chip->rbatt_sf_lut, |
| 1047 | batt_temp, soc_rbatt); |
| 1048 | pr_debug("rbatt sf = %d for batt_temp = %d, soc_rbatt = %d\n", |
| 1049 | scalefactor, batt_temp, soc_rbatt); |
| 1050 | rbatt = (rbatt * scalefactor) / 100; |
| 1051 | |
Abhijeet Dharmapurikar | baffba4 | 2012-03-22 14:41:10 -0700 | [diff] [blame] | 1052 | rbatt += the_chip->rconn_mohm; |
| 1053 | pr_debug("adding rconn_mohm = %d rbatt = %d\n", |
| 1054 | the_chip->rconn_mohm, rbatt); |
| 1055 | |
Abhijeet Dharmapurikar | ded189b | 2012-03-30 10:12:28 -0700 | [diff] [blame] | 1056 | if (is_between(20, 10, soc_rbatt)) |
| 1057 | rbatt = rbatt |
| 1058 | + ((20 - soc_rbatt) * chip->delta_rbatt_mohm) / 10; |
| 1059 | else |
| 1060 | if (is_between(10, 0, soc_rbatt)) |
| 1061 | rbatt = rbatt + chip->delta_rbatt_mohm; |
| 1062 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1063 | pr_debug("RBATT = %d\n", rbatt); |
| 1064 | return rbatt; |
| 1065 | } |
| 1066 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1067 | static int calculate_fcc_uah(struct pm8921_bms_chip *chip, int batt_temp, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1068 | int chargecycles) |
| 1069 | { |
| 1070 | int initfcc, result, scalefactor = 0; |
| 1071 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1072 | if (chip->adjusted_fcc_temp_lut == NULL) { |
| 1073 | initfcc = interpolate_fcc(chip, batt_temp); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1074 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1075 | scalefactor = interpolate_scalingfactor_fcc(chip, chargecycles); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1076 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1077 | /* Multiply the initial FCC value by the scale factor. */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1078 | result = (initfcc * scalefactor * 1000) / 100; |
| 1079 | pr_debug("fcc = %d uAh\n", result); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1080 | return result; |
| 1081 | } else { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1082 | return 1000 * interpolate_fcc_adjusted(chip, batt_temp); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1083 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1084 | } |
| 1085 | |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1086 | static int get_battery_uvolts(struct pm8921_bms_chip *chip, int *uvolts) |
| 1087 | { |
| 1088 | int rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1089 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1090 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1091 | rc = pm8xxx_adc_read(chip->vbat_channel, &result); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1092 | if (rc) { |
| 1093 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 1094 | chip->vbat_channel, rc); |
| 1095 | return rc; |
| 1096 | } |
| 1097 | pr_debug("mvolts phy = %lld meas = 0x%llx", result.physical, |
| 1098 | result.measurement); |
| 1099 | *uvolts = (int)result.physical; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | static int adc_based_ocv(struct pm8921_bms_chip *chip, int *ocv) |
| 1104 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 1105 | int vbatt, rbatt, ibatt_ua, rc; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1106 | |
| 1107 | rc = get_battery_uvolts(chip, &vbatt); |
| 1108 | if (rc) { |
| 1109 | pr_err("failed to read vbatt from adc rc = %d\n", rc); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1110 | return rc; |
| 1111 | } |
| 1112 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 1113 | rc = pm8921_bms_get_battery_current(&ibatt_ua); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1114 | if (rc) { |
| 1115 | pr_err("failed to read batt current rc = %d\n", rc); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1116 | return rc; |
| 1117 | } |
| 1118 | |
Abhijeet Dharmapurikar | 0711c52 | 2012-05-22 18:45:25 -0700 | [diff] [blame] | 1119 | rbatt = chip->default_rbatt_mohm; |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 1120 | *ocv = vbatt + (ibatt_ua * rbatt)/1000; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1121 | return 0; |
| 1122 | } |
| 1123 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1124 | static int calculate_pc(struct pm8921_bms_chip *chip, int ocv_uv, int batt_temp, |
| 1125 | int chargecycles) |
| 1126 | { |
| 1127 | int pc, scalefactor; |
| 1128 | |
Abhijeet Dharmapurikar | c5df371 | 2012-08-27 19:27:57 -0700 | [diff] [blame] | 1129 | pc = interpolate_pc(chip, batt_temp / 10, ocv_uv / 1000); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1130 | pr_debug("pc = %u for ocv = %dmicroVolts batt_temp = %d\n", |
| 1131 | pc, ocv_uv, batt_temp); |
| 1132 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1133 | scalefactor = interpolate_scalingfactor(chip, |
| 1134 | chip->pc_sf_lut, chargecycles, pc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1135 | pr_debug("scalefactor = %u batt_temp = %d\n", scalefactor, batt_temp); |
| 1136 | |
| 1137 | /* Multiply the initial FCC value by the scale factor. */ |
| 1138 | pc = (pc * scalefactor) / 100; |
| 1139 | return pc; |
| 1140 | } |
| 1141 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1142 | /** |
| 1143 | * calculate_cc_uah - |
| 1144 | * @chip: the bms chip pointer |
| 1145 | * @cc: the cc reading from bms h/w |
| 1146 | * @val: return value |
| 1147 | * @coulumb_counter: adjusted coulumb counter for 100% |
| 1148 | * |
| 1149 | * RETURNS: in val pointer coulumb counter based charger in uAh |
| 1150 | * (micro Amp hour) |
| 1151 | */ |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1152 | static void calculate_cc_uah(struct pm8921_bms_chip *chip, int cc, int *val) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1153 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1154 | int64_t cc_voltage_uv, cc_nvh, cc_uah; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1155 | |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1156 | cc_voltage_uv = cc; |
| 1157 | cc_voltage_uv -= chip->cc_reading_at_100; |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1158 | pr_debug("cc = %d. after subtracting 0x%x cc = %lld\n", |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1159 | cc, chip->cc_reading_at_100, |
| 1160 | cc_voltage_uv); |
Abhijeet Dharmapurikar | fa77f1a | 2011-06-27 21:11:51 -0700 | [diff] [blame] | 1161 | cc_voltage_uv = cc_to_microvolt(chip, cc_voltage_uv); |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 1162 | cc_voltage_uv = pm8xxx_cc_adjust_for_gain(cc_voltage_uv); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1163 | pr_debug("cc_voltage_uv = %lld microvolts\n", cc_voltage_uv); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1164 | cc_nvh = ccmicrovolt_to_nvh(cc_voltage_uv); |
| 1165 | pr_debug("cc_nvh = %lld nano_volt_hour\n", cc_nvh); |
| 1166 | cc_uah = div_s64(cc_nvh, chip->r_sense); |
| 1167 | *val = cc_uah; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1168 | } |
| 1169 | |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1170 | static int calculate_termination_uuc(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1171 | int batt_temp, int chargecycles, |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1172 | int fcc_uah, int i_ma, |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 1173 | int *ret_pc_unusable) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1174 | { |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1175 | int unusable_uv, pc_unusable, uuc; |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1176 | int i = 0; |
| 1177 | int ocv_mv; |
| 1178 | int batt_temp_degc = batt_temp / 10; |
| 1179 | int rbatt_mohm; |
| 1180 | int delta_uv; |
| 1181 | int prev_delta_uv = 0; |
| 1182 | int prev_rbatt_mohm = 0; |
| 1183 | int prev_ocv_mv = 0; |
| 1184 | int uuc_rbatt_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1185 | |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1186 | for (i = 0; i <= 100; i++) { |
| 1187 | ocv_mv = interpolate_ocv(chip, batt_temp_degc, i); |
| 1188 | rbatt_mohm = get_rbatt(chip, i, batt_temp); |
| 1189 | unusable_uv = (rbatt_mohm * i_ma) + (chip->v_cutoff * 1000); |
| 1190 | delta_uv = ocv_mv * 1000 - unusable_uv; |
| 1191 | |
| 1192 | pr_debug("soc = %d ocv = %d rbat = %d u_uv = %d delta_v = %d\n", |
| 1193 | i, ocv_mv, rbatt_mohm, unusable_uv, delta_uv); |
| 1194 | |
| 1195 | if (delta_uv > 0) |
| 1196 | break; |
| 1197 | |
| 1198 | prev_delta_uv = delta_uv; |
| 1199 | prev_rbatt_mohm = rbatt_mohm; |
| 1200 | prev_ocv_mv = ocv_mv; |
| 1201 | } |
| 1202 | |
| 1203 | uuc_rbatt_uv = linear_interpolate(rbatt_mohm, delta_uv, |
| 1204 | prev_rbatt_mohm, prev_delta_uv, |
| 1205 | 0); |
| 1206 | |
| 1207 | unusable_uv = (uuc_rbatt_uv * i_ma) + (chip->v_cutoff * 1000); |
| 1208 | |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1209 | pc_unusable = calculate_pc(chip, unusable_uv, batt_temp, chargecycles); |
| 1210 | uuc = (fcc_uah * pc_unusable) / 100; |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1211 | pr_debug("For i_ma = %d, unusable_rbatt = %d unusable_uv = %d unusable_pc = %d uuc = %d\n", |
| 1212 | i_ma, uuc_rbatt_uv, unusable_uv, |
| 1213 | pc_unusable, uuc); |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 1214 | *ret_pc_unusable = pc_unusable; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1215 | return uuc; |
| 1216 | } |
| 1217 | |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 1218 | static int adjust_uuc(struct pm8921_bms_chip *chip, int fcc_uah, |
| 1219 | int new_pc_unusable, |
| 1220 | int new_uuc, |
| 1221 | int batt_temp, |
| 1222 | int rbatt, |
| 1223 | int *iavg_ma) |
| 1224 | { |
| 1225 | int new_unusable_mv; |
| 1226 | int batt_temp_degc = batt_temp / 10; |
| 1227 | |
| 1228 | if (chip->prev_pc_unusable == -EINVAL |
| 1229 | || abs(chip->prev_pc_unusable - new_pc_unusable) <= 1) { |
| 1230 | chip->prev_pc_unusable = new_pc_unusable; |
| 1231 | return new_uuc; |
| 1232 | } |
| 1233 | |
| 1234 | /* the uuc is trying to change more than 1% restrict it */ |
| 1235 | if (new_pc_unusable > chip->prev_pc_unusable) |
| 1236 | chip->prev_pc_unusable++; |
| 1237 | else |
| 1238 | chip->prev_pc_unusable--; |
| 1239 | |
| 1240 | new_uuc = (fcc_uah * chip->prev_pc_unusable) / 100; |
| 1241 | |
| 1242 | /* also find update the iavg_ma accordingly */ |
| 1243 | new_unusable_mv = interpolate_ocv(chip, batt_temp_degc, |
| 1244 | chip->prev_pc_unusable); |
| 1245 | if (new_unusable_mv < chip->v_cutoff) |
| 1246 | new_unusable_mv = chip->v_cutoff; |
| 1247 | |
| 1248 | *iavg_ma = (new_unusable_mv - chip->v_cutoff) * 1000 / rbatt; |
| 1249 | if (*iavg_ma == 0) |
| 1250 | *iavg_ma = 1; |
| 1251 | pr_debug("Restricting UUC to %d (%d%%) unusable_mv = %d iavg_ma = %d\n", |
| 1252 | new_uuc, chip->prev_pc_unusable, |
| 1253 | new_unusable_mv, *iavg_ma); |
| 1254 | |
| 1255 | return new_uuc; |
| 1256 | } |
| 1257 | |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1258 | static void calculate_iavg_ua(struct pm8921_bms_chip *chip, int cc_uah, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1259 | int *iavg_ua, int *delta_time_s) |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1260 | { |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1261 | int delta_cc_uah; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1262 | struct rtc_time tm; |
| 1263 | struct rtc_device *rtc; |
| 1264 | unsigned long now_tm_sec = 0; |
| 1265 | int rc = 0; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1266 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1267 | /* if anything fails report the previous iavg_ua */ |
| 1268 | *iavg_ua = chip->prev_iavg_ua; |
| 1269 | |
| 1270 | rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE); |
| 1271 | if (rtc == NULL) { |
| 1272 | pr_err("%s: unable to open rtc device (%s)\n", |
| 1273 | __FILE__, CONFIG_RTC_HCTOSYS_DEVICE); |
| 1274 | goto out; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1275 | } |
| 1276 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1277 | rc = rtc_read_time(rtc, &tm); |
| 1278 | if (rc) { |
| 1279 | pr_err("Error reading rtc device (%s) : %d\n", |
| 1280 | CONFIG_RTC_HCTOSYS_DEVICE, rc); |
| 1281 | goto out; |
| 1282 | } |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1283 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1284 | rc = rtc_valid_tm(&tm); |
| 1285 | if (rc) { |
| 1286 | pr_err("Invalid RTC time (%s): %d\n", |
| 1287 | CONFIG_RTC_HCTOSYS_DEVICE, rc); |
| 1288 | goto out; |
| 1289 | } |
| 1290 | rtc_tm_to_time(&tm, &now_tm_sec); |
| 1291 | |
| 1292 | if (chip->tm_sec == 0) { |
| 1293 | *delta_time_s = 0; |
| 1294 | pm8921_bms_get_battery_current(iavg_ua); |
| 1295 | goto out; |
| 1296 | } |
| 1297 | |
| 1298 | *delta_time_s = (now_tm_sec - chip->tm_sec); |
| 1299 | |
| 1300 | /* use the previous iavg if called within 15 seconds */ |
| 1301 | if (*delta_time_s < 15) { |
| 1302 | *iavg_ua = chip->prev_iavg_ua; |
| 1303 | goto out; |
| 1304 | } |
| 1305 | |
| 1306 | delta_cc_uah = cc_uah - chip->last_cc_uah; |
| 1307 | |
| 1308 | *iavg_ua = div_s64((s64)delta_cc_uah * 3600, *delta_time_s); |
| 1309 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1310 | pr_debug("tm_sec = %ld, now_tm_sec = %ld delta_s = %d delta_cc = %d iavg_ua = %d\n", |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1311 | chip->tm_sec, now_tm_sec, |
| 1312 | *delta_time_s, delta_cc_uah, (int)*iavg_ua); |
| 1313 | |
| 1314 | out: |
| 1315 | /* remember the iavg */ |
| 1316 | chip->prev_iavg_ua = *iavg_ua; |
| 1317 | |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1318 | /* remember cc_uah */ |
| 1319 | chip->last_cc_uah = cc_uah; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1320 | |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1321 | /* remember this time */ |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1322 | chip->tm_sec = now_tm_sec; |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1323 | } |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1324 | |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1325 | #define IAVG_SAMPLES 16 |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1326 | #define CHARGING_IAVG_MA 250 |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1327 | #define MIN_SECONDS_FOR_VALID_SAMPLE 20 |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1328 | static int calculate_unusable_charge_uah(struct pm8921_bms_chip *chip, |
| 1329 | int rbatt, int fcc_uah, int cc_uah, |
| 1330 | int soc_rbatt, int batt_temp, int chargecycles, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1331 | int iavg_ua, int delta_time_s) |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1332 | { |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1333 | int uuc_uah_iavg; |
| 1334 | int i; |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1335 | int iavg_ma = iavg_ua / 1000; |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1336 | static int iavg_samples[IAVG_SAMPLES]; |
| 1337 | static int iavg_index; |
| 1338 | static int iavg_num_samples; |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1339 | static int firsttime = 1; |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 1340 | int pc_unusable; |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1341 | |
| 1342 | /* |
| 1343 | * if we are called first time fill all the |
| 1344 | * samples with the the shutdown_iavg_ua |
| 1345 | */ |
| 1346 | if (firsttime && chip->shutdown_iavg_ua != 0) { |
| 1347 | pr_emerg("Using shutdown_iavg_ua = %d in all samples\n", |
| 1348 | chip->shutdown_iavg_ua); |
| 1349 | for (i = 0; i < IAVG_SAMPLES; i++) |
| 1350 | iavg_samples[i] = chip->shutdown_iavg_ua; |
| 1351 | |
| 1352 | iavg_index = 0; |
| 1353 | iavg_num_samples = IAVG_SAMPLES; |
| 1354 | } |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1355 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1356 | /* |
| 1357 | * if we are charging use a nominal avg current so that we keep |
| 1358 | * a reasonable UUC while charging |
| 1359 | */ |
| 1360 | if (iavg_ma < 0) |
| 1361 | iavg_ma = CHARGING_IAVG_MA; |
| 1362 | iavg_samples[iavg_index] = iavg_ma; |
| 1363 | iavg_index = (iavg_index + 1) % IAVG_SAMPLES; |
| 1364 | iavg_num_samples++; |
| 1365 | if (iavg_num_samples >= IAVG_SAMPLES) |
| 1366 | iavg_num_samples = IAVG_SAMPLES; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1367 | |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1368 | /* now that this sample is added calcualte the average */ |
| 1369 | iavg_ma = 0; |
| 1370 | if (iavg_num_samples != 0) { |
| 1371 | for (i = 0; i < iavg_num_samples; i++) { |
| 1372 | pr_debug("iavg_samples[%d] = %d\n", i, iavg_samples[i]); |
| 1373 | iavg_ma += iavg_samples[i]; |
| 1374 | } |
| 1375 | |
| 1376 | iavg_ma = DIV_ROUND_CLOSEST(iavg_ma, iavg_num_samples); |
| 1377 | } |
| 1378 | |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1379 | uuc_uah_iavg = calculate_termination_uuc(chip, |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1380 | batt_temp, chargecycles, |
Abhijeet Dharmapurikar | 5dc6d34 | 2012-08-04 13:58:53 -0700 | [diff] [blame] | 1381 | fcc_uah, iavg_ma, |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 1382 | &pc_unusable); |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1383 | pr_debug("iavg = %d uuc_iavg = %d\n", iavg_ma, uuc_uah_iavg); |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 1384 | |
| 1385 | /* restrict the uuc such that it can increase only by one percent */ |
| 1386 | uuc_uah_iavg = adjust_uuc(chip, fcc_uah, pc_unusable, uuc_uah_iavg, |
| 1387 | batt_temp, rbatt, &iavg_ma); |
| 1388 | |
| 1389 | /* find out what the avg current should be for this uuc */ |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1390 | chip->prev_uuc_iavg_ma = iavg_ma; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1391 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1392 | firsttime = 0; |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1393 | return uuc_uah_iavg; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1394 | } |
Abhijeet Dharmapurikar | 52aa968 | 2011-07-20 14:05:47 -0700 | [diff] [blame] | 1395 | |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1396 | /* calculate remainging charge at the time of ocv */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1397 | static int calculate_remaining_charge_uah(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1398 | struct pm8921_soc_params *raw, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1399 | int fcc_uah, int batt_temp, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1400 | int chargecycles) |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1401 | { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1402 | int ocv, pc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1403 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1404 | ocv = raw->last_good_ocv_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1405 | pc = calculate_pc(chip, ocv, batt_temp, chargecycles); |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1406 | pr_debug("ocv = %d pc = %d\n", ocv, pc); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1407 | return (fcc_uah * pc) / 100; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1408 | } |
| 1409 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1410 | static void calculate_soc_params(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1411 | struct pm8921_soc_params *raw, |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1412 | int batt_temp, int chargecycles, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1413 | int *fcc_uah, |
| 1414 | int *unusable_charge_uah, |
| 1415 | int *remaining_charge_uah, |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1416 | int *cc_uah, |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1417 | int *rbatt, |
| 1418 | int *iavg_ua, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1419 | int *delta_time_s) |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1420 | { |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1421 | int soc_rbatt; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1422 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1423 | *fcc_uah = calculate_fcc_uah(chip, batt_temp, chargecycles); |
| 1424 | pr_debug("FCC = %uuAh batt_temp = %d, cycles = %d\n", |
| 1425 | *fcc_uah, batt_temp, chargecycles); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1426 | |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1427 | |
| 1428 | /* calculate remainging charge */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1429 | *remaining_charge_uah = calculate_remaining_charge_uah(chip, raw, |
| 1430 | *fcc_uah, batt_temp, chargecycles); |
| 1431 | pr_debug("RC = %uuAh\n", *remaining_charge_uah); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1432 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1433 | /* calculate cc micro_volt_hour */ |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1434 | calculate_cc_uah(chip, raw->cc, cc_uah); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1435 | pr_debug("cc_uah = %duAh raw->cc = %x cc = %lld after subtracting %x\n", |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1436 | *cc_uah, raw->cc, |
| 1437 | (int64_t)raw->cc - chip->cc_reading_at_100, |
| 1438 | chip->cc_reading_at_100); |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1439 | |
| 1440 | soc_rbatt = ((*remaining_charge_uah - *cc_uah) * 100) / *fcc_uah; |
| 1441 | if (soc_rbatt < 0) |
| 1442 | soc_rbatt = 0; |
| 1443 | *rbatt = get_rbatt(chip, soc_rbatt, batt_temp); |
| 1444 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1445 | calculate_iavg_ua(chip, *cc_uah, iavg_ua, delta_time_s); |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1446 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1447 | *unusable_charge_uah = calculate_unusable_charge_uah(chip, *rbatt, |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 1448 | *fcc_uah, *cc_uah, soc_rbatt, |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1449 | batt_temp, chargecycles, *iavg_ua, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1450 | *delta_time_s); |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1451 | pr_debug("UUC = %uuAh\n", *unusable_charge_uah); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1452 | } |
| 1453 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1454 | static int calculate_real_fcc_uah(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1455 | struct pm8921_soc_params *raw, |
| 1456 | int batt_temp, int chargecycles, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1457 | int *ret_fcc_uah) |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1458 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1459 | int fcc_uah, unusable_charge_uah; |
| 1460 | int remaining_charge_uah; |
| 1461 | int cc_uah; |
| 1462 | int real_fcc_uah; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1463 | int rbatt; |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1464 | int iavg_ua; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1465 | int delta_time_s; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1466 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1467 | calculate_soc_params(chip, raw, batt_temp, chargecycles, |
| 1468 | &fcc_uah, |
| 1469 | &unusable_charge_uah, |
| 1470 | &remaining_charge_uah, |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1471 | &cc_uah, |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1472 | &rbatt, |
| 1473 | &iavg_ua, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1474 | &delta_time_s); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1475 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1476 | real_fcc_uah = remaining_charge_uah - cc_uah; |
| 1477 | *ret_fcc_uah = fcc_uah; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1478 | pr_debug("real_fcc = %d, RC = %d CC = %d fcc = %d\n", |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1479 | real_fcc_uah, remaining_charge_uah, cc_uah, fcc_uah); |
| 1480 | return real_fcc_uah; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1481 | } |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1482 | |
Abhijeet Dharmapurikar | b268013 | 2012-05-15 16:32:51 -0700 | [diff] [blame] | 1483 | int pm8921_bms_get_simultaneous_battery_voltage_and_current(int *ibat_ua, |
| 1484 | int *vbat_uv) |
| 1485 | { |
| 1486 | int rc; |
| 1487 | |
| 1488 | if (the_chip == NULL) { |
| 1489 | pr_err("Called too early\n"); |
| 1490 | return -EINVAL; |
| 1491 | } |
| 1492 | |
| 1493 | if (pm8921_is_batfet_closed()) { |
| 1494 | return override_mode_simultaneous_battery_voltage_and_current( |
| 1495 | ibat_ua, |
| 1496 | vbat_uv); |
| 1497 | } else { |
| 1498 | pr_debug("batfet is open using separate vbat and ibat meas\n"); |
| 1499 | rc = get_battery_uvolts(the_chip, vbat_uv); |
| 1500 | if (rc < 0) { |
| 1501 | pr_err("adc vbat failed err = %d\n", rc); |
| 1502 | return rc; |
| 1503 | } |
| 1504 | rc = pm8921_bms_get_battery_current(ibat_ua); |
| 1505 | if (rc < 0) { |
| 1506 | pr_err("bms ibat failed err = %d\n", rc); |
| 1507 | return rc; |
| 1508 | } |
| 1509 | } |
| 1510 | |
| 1511 | return 0; |
| 1512 | } |
| 1513 | EXPORT_SYMBOL(pm8921_bms_get_simultaneous_battery_voltage_and_current); |
| 1514 | |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 1515 | static void find_ocv_for_soc(struct pm8921_bms_chip *chip, |
| 1516 | int batt_temp, |
| 1517 | int chargecycles, |
| 1518 | int fcc_uah, |
| 1519 | int uuc_uah, |
| 1520 | int cc_uah, |
| 1521 | int shutdown_soc, |
| 1522 | int *rc_uah, |
| 1523 | int *ocv_uv) |
| 1524 | { |
| 1525 | s64 rc; |
| 1526 | int pc, new_pc; |
| 1527 | int batt_temp_degc = batt_temp / 10; |
| 1528 | int ocv; |
| 1529 | |
| 1530 | rc = (s64)shutdown_soc * (fcc_uah - uuc_uah); |
| 1531 | rc = div_s64(rc, 100) + cc_uah + uuc_uah; |
| 1532 | pc = DIV_ROUND_CLOSEST((int)rc * 100, fcc_uah); |
| 1533 | pc = clamp(pc, 0, 100); |
| 1534 | |
| 1535 | ocv = interpolate_ocv(chip, batt_temp_degc, pc); |
| 1536 | |
| 1537 | pr_debug("s_soc = %d, fcc = %d uuc = %d rc = %d, pc = %d, ocv mv = %d\n", |
| 1538 | shutdown_soc, fcc_uah, uuc_uah, (int)rc, pc, ocv); |
| 1539 | new_pc = interpolate_pc(chip, batt_temp_degc, ocv); |
| 1540 | pr_debug("test revlookup pc = %d for ocv = %d\n", new_pc, ocv); |
| 1541 | |
| 1542 | while (abs(new_pc - pc) > 1) { |
| 1543 | int delta_mv = 5; |
| 1544 | |
| 1545 | if (new_pc > pc) |
| 1546 | delta_mv = -1 * delta_mv; |
| 1547 | |
| 1548 | ocv = ocv + delta_mv; |
| 1549 | new_pc = interpolate_pc(chip, batt_temp_degc, ocv); |
| 1550 | pr_debug("test revlookup pc = %d for ocv = %d\n", new_pc, ocv); |
| 1551 | } |
| 1552 | |
| 1553 | *ocv_uv = ocv * 1000; |
| 1554 | *rc_uah = (int)rc; |
| 1555 | } |
| 1556 | |
| 1557 | static void adjust_rc_and_uuc_for_specific_soc( |
| 1558 | struct pm8921_bms_chip *chip, |
| 1559 | int batt_temp, |
| 1560 | int chargecycles, |
| 1561 | int soc, |
| 1562 | int fcc_uah, |
| 1563 | int uuc_uah, |
| 1564 | int cc_uah, |
| 1565 | int rc_uah, |
| 1566 | int rbatt, |
| 1567 | int *ret_ocv, |
| 1568 | int *ret_rc, |
| 1569 | int *ret_uuc, |
| 1570 | int *ret_rbatt) |
| 1571 | { |
| 1572 | int ocv_uv; |
| 1573 | |
| 1574 | find_ocv_for_soc(chip, batt_temp, chargecycles, |
| 1575 | fcc_uah, uuc_uah, cc_uah, |
| 1576 | soc, |
| 1577 | &rc_uah, &ocv_uv); |
| 1578 | |
| 1579 | *ret_ocv = ocv_uv; |
| 1580 | *ret_rbatt = rbatt; |
| 1581 | *ret_rc = rc_uah; |
| 1582 | *ret_uuc = uuc_uah; |
| 1583 | } |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1584 | static int bound_soc(int soc) |
| 1585 | { |
| 1586 | soc = max(0, soc); |
| 1587 | soc = min(100, soc); |
| 1588 | return soc; |
| 1589 | } |
| 1590 | |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1591 | static int charging_adjustments(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 1592 | int soc, int vbat_uv, int ibat_ua, |
| 1593 | int batt_temp, int chargecycles, |
| 1594 | int fcc_uah, int cc_uah, int uuc_uah) |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1595 | { |
| 1596 | int chg_soc; |
| 1597 | |
| 1598 | if (chip->soc_at_cv == -EINVAL) { |
| 1599 | /* In constant current charging return the calc soc */ |
| 1600 | if (vbat_uv <= chip->max_voltage_uv) |
| 1601 | pr_debug("CC CHG SOC %d\n", soc); |
| 1602 | |
| 1603 | /* Note the CC to CV point */ |
| 1604 | if (vbat_uv >= chip->max_voltage_uv) { |
| 1605 | chip->soc_at_cv = soc; |
| 1606 | chip->prev_chg_soc = soc; |
| 1607 | chip->ibat_at_cv_ua = ibat_ua; |
| 1608 | pr_debug("CC_TO_CV ibat_ua = %d CHG SOC %d\n", |
| 1609 | ibat_ua, soc); |
| 1610 | } |
| 1611 | return soc; |
| 1612 | } |
| 1613 | |
| 1614 | /* |
| 1615 | * battery is in CV phase - begin liner inerpolation of soc based on |
| 1616 | * battery charge current |
| 1617 | */ |
| 1618 | |
| 1619 | /* |
| 1620 | * if voltage lessened (possibly because of a system load) |
| 1621 | * keep reporting the prev chg soc |
| 1622 | */ |
| 1623 | if (vbat_uv <= chip->max_voltage_uv) { |
Abhijeet Dharmapurikar | d3c435e | 2012-08-16 19:23:18 -0700 | [diff] [blame] | 1624 | pr_debug("vbat %d < max = %d CC CHG SOC %d\n", |
| 1625 | vbat_uv, chip->max_voltage_uv, chip->prev_chg_soc); |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1626 | return chip->prev_chg_soc; |
| 1627 | } |
| 1628 | |
| 1629 | chg_soc = linear_interpolate(chip->soc_at_cv, chip->ibat_at_cv_ua, |
| 1630 | 100, -100000, |
| 1631 | ibat_ua); |
| 1632 | |
| 1633 | /* always report a higher soc */ |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 1634 | if (chg_soc > chip->prev_chg_soc) { |
| 1635 | int new_ocv_uv; |
| 1636 | int new_rc; |
| 1637 | |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1638 | chip->prev_chg_soc = chg_soc; |
| 1639 | |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 1640 | find_ocv_for_soc(chip, batt_temp, chargecycles, |
| 1641 | fcc_uah, uuc_uah, cc_uah, |
| 1642 | chg_soc, |
| 1643 | &new_rc, &new_ocv_uv); |
| 1644 | the_chip->last_ocv_uv = new_ocv_uv; |
| 1645 | pr_debug("CC CHG ADJ OCV = %d CHG SOC %d\n", |
| 1646 | new_ocv_uv, |
| 1647 | chip->prev_chg_soc); |
| 1648 | } |
| 1649 | |
Abhijeet Dharmapurikar | d3c435e | 2012-08-16 19:23:18 -0700 | [diff] [blame] | 1650 | pr_debug("Reporting CHG SOC %d\n", chip->prev_chg_soc); |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1651 | return chip->prev_chg_soc; |
| 1652 | } |
| 1653 | |
Abhijeet Dharmapurikar | d1c761d | 2012-08-14 19:15:53 -0700 | [diff] [blame^] | 1654 | static void very_low_voltage_check(struct pm8921_bms_chip *chip, |
| 1655 | int ibat_ua, int vbat_uv) |
| 1656 | { |
| 1657 | /* |
| 1658 | * if battery is very low (v_cutoff voltage + 20mv) hold |
| 1659 | * a wakelock untill soc = 0% |
| 1660 | */ |
| 1661 | if (vbat_uv <= (chip->v_cutoff + 20) * 1000 |
| 1662 | && !chip->low_voltage_wake_lock_held) { |
| 1663 | pr_debug("voltage = %d low holding wakelock\n", vbat_uv); |
| 1664 | wake_lock(&chip->low_voltage_wake_lock); |
| 1665 | chip->low_voltage_wake_lock_held = 1; |
| 1666 | } |
| 1667 | |
| 1668 | if (vbat_uv > (chip->v_cutoff + 20) * 1000 |
| 1669 | && chip->low_voltage_wake_lock_held) { |
| 1670 | pr_debug("voltage = %d releasing wakelock\n", vbat_uv); |
| 1671 | chip->low_voltage_wake_lock_held = 0; |
| 1672 | wake_unlock(&chip->low_voltage_wake_lock); |
| 1673 | } |
| 1674 | } |
| 1675 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1676 | static int last_soc_est = -EINVAL; |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 1677 | static int adjust_soc(struct pm8921_bms_chip *chip, int soc, |
| 1678 | int batt_temp, int chargecycles, |
| 1679 | int rbatt, int fcc_uah, int uuc_uah, int cc_uah) |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1680 | { |
| 1681 | int ibat_ua = 0, vbat_uv = 0; |
| 1682 | int ocv_est_uv = 0, soc_est = 0, pc_est = 0, pc = 0; |
| 1683 | int delta_ocv_uv = 0; |
| 1684 | int n = 0; |
| 1685 | int rc_new_uah = 0; |
| 1686 | int pc_new = 0; |
| 1687 | int soc_new = 0; |
| 1688 | int m = 0; |
Abhijeet Dharmapurikar | b268013 | 2012-05-15 16:32:51 -0700 | [diff] [blame] | 1689 | int rc = 0; |
Abhijeet Dharmapurikar | 720b00e | 2012-08-01 21:33:09 -0700 | [diff] [blame] | 1690 | int delta_ocv_uv_limit = 0; |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1691 | |
Abhijeet Dharmapurikar | b268013 | 2012-05-15 16:32:51 -0700 | [diff] [blame] | 1692 | rc = pm8921_bms_get_simultaneous_battery_voltage_and_current( |
| 1693 | &ibat_ua, |
| 1694 | &vbat_uv); |
| 1695 | if (rc < 0) { |
| 1696 | pr_err("simultaneous vbat ibat failed err = %d\n", rc); |
| 1697 | goto out; |
| 1698 | } |
| 1699 | |
Abhijeet Dharmapurikar | d1c761d | 2012-08-14 19:15:53 -0700 | [diff] [blame^] | 1700 | very_low_voltage_check(chip, ibat_ua, vbat_uv); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1701 | |
Abhijeet Dharmapurikar | 720b00e | 2012-08-01 21:33:09 -0700 | [diff] [blame] | 1702 | delta_ocv_uv_limit = DIV_ROUND_CLOSEST(ibat_ua, 1000); |
| 1703 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1704 | ocv_est_uv = vbat_uv + (ibat_ua * rbatt)/1000; |
| 1705 | pc_est = calculate_pc(chip, ocv_est_uv, batt_temp, last_chargecycles); |
| 1706 | soc_est = div_s64((s64)fcc_uah * pc_est - uuc_uah*100, |
| 1707 | (s64)fcc_uah - uuc_uah); |
| 1708 | soc_est = bound_soc(soc_est); |
| 1709 | |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1710 | if (ibat_ua < 0) { |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 1711 | soc = charging_adjustments(chip, soc, vbat_uv, ibat_ua, |
| 1712 | batt_temp, chargecycles, |
| 1713 | fcc_uah, cc_uah, uuc_uah); |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1714 | goto out; |
| 1715 | } |
| 1716 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1717 | /* |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1718 | * do not adjust |
| 1719 | * if soc is same as what bms calculated |
| 1720 | * if soc_est is between 45 and 25, this is the flat portion of the |
| 1721 | * curve where soc_est is not so accurate. We generally don't want to |
| 1722 | * adjust when soc_est is inaccurate except for the cases when soc is |
| 1723 | * way far off (higher than 50 or lesser than 20). |
Abhijeet Dharmapurikar | 52daf65 | 2012-07-19 11:50:47 -0700 | [diff] [blame] | 1724 | * Also don't adjust soc if it is above 90 becuase we might pull it low |
| 1725 | * and cause a bad user experience |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1726 | */ |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 1727 | if (soc_est == soc |
Abhijeet Dharmapurikar | 720b00e | 2012-08-01 21:33:09 -0700 | [diff] [blame] | 1728 | || (is_between(45, chip->adjust_soc_low_threshold, soc_est) |
| 1729 | && is_between(50, chip->adjust_soc_low_threshold - 5, soc)) |
Abhijeet Dharmapurikar | 52daf65 | 2012-07-19 11:50:47 -0700 | [diff] [blame] | 1730 | || soc >= 90) |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1731 | goto out; |
| 1732 | |
| 1733 | if (last_soc_est == -EINVAL) |
| 1734 | last_soc_est = soc; |
| 1735 | |
| 1736 | n = min(200, max(1 , soc + soc_est + last_soc_est)); |
| 1737 | /* remember the last soc_est in last_soc_est */ |
| 1738 | last_soc_est = soc_est; |
| 1739 | |
| 1740 | pc = calculate_pc(chip, chip->last_ocv_uv, |
| 1741 | batt_temp, last_chargecycles); |
| 1742 | if (pc > 0) { |
| 1743 | pc_new = calculate_pc(chip, chip->last_ocv_uv - (++m * 1000), |
| 1744 | batt_temp, last_chargecycles); |
| 1745 | while (pc_new == pc) { |
| 1746 | /* start taking 10mV steps */ |
| 1747 | m = m + 10; |
| 1748 | pc_new = calculate_pc(chip, |
| 1749 | chip->last_ocv_uv - (m * 1000), |
| 1750 | batt_temp, last_chargecycles); |
| 1751 | } |
| 1752 | } else { |
| 1753 | /* |
| 1754 | * pc is already at the lowest point, |
| 1755 | * assume 1 millivolt translates to 1% pc |
| 1756 | */ |
| 1757 | pc = 1; |
| 1758 | pc_new = 0; |
| 1759 | m = 1; |
| 1760 | } |
| 1761 | |
| 1762 | delta_ocv_uv = div_s64((soc - soc_est) * (s64)m * 1000, |
| 1763 | n * (pc - pc_new)); |
Abhijeet Dharmapurikar | 720b00e | 2012-08-01 21:33:09 -0700 | [diff] [blame] | 1764 | |
| 1765 | if (abs(delta_ocv_uv) > delta_ocv_uv_limit) { |
| 1766 | pr_debug("limiting delta ocv %d limit = %d\n", delta_ocv_uv, |
| 1767 | delta_ocv_uv_limit); |
| 1768 | |
| 1769 | if (delta_ocv_uv > 0) |
| 1770 | delta_ocv_uv = delta_ocv_uv_limit; |
| 1771 | else |
| 1772 | delta_ocv_uv = -1 * delta_ocv_uv_limit; |
| 1773 | pr_debug("new delta ocv = %d\n", delta_ocv_uv); |
| 1774 | } |
| 1775 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1776 | chip->last_ocv_uv -= delta_ocv_uv; |
| 1777 | |
| 1778 | if (chip->last_ocv_uv >= chip->max_voltage_uv) |
| 1779 | chip->last_ocv_uv = chip->max_voltage_uv; |
| 1780 | |
| 1781 | /* calculate the soc based on this new ocv */ |
| 1782 | pc_new = calculate_pc(chip, chip->last_ocv_uv, |
| 1783 | batt_temp, last_chargecycles); |
| 1784 | rc_new_uah = (fcc_uah * pc_new) / 100; |
| 1785 | soc_new = (rc_new_uah - cc_uah - uuc_uah)*100 / (fcc_uah - uuc_uah); |
| 1786 | soc_new = bound_soc(soc_new); |
| 1787 | |
| 1788 | /* |
| 1789 | * if soc_new is ZERO force it higher so that phone doesnt report soc=0 |
| 1790 | * soc = 0 should happen only when soc_est == 0 |
| 1791 | */ |
| 1792 | if (soc_new == 0 && soc_est != 0) |
| 1793 | soc_new = 1; |
| 1794 | |
| 1795 | soc = soc_new; |
| 1796 | |
| 1797 | out: |
| 1798 | pr_debug("ibat_ua = %d, vbat_uv = %d, ocv_est_uv = %d, pc_est = %d, " |
| 1799 | "soc_est = %d, n = %d, delta_ocv_uv = %d, last_ocv_uv = %d, " |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1800 | "pc_new = %d, soc_new = %d, rbatt = %d, m = %d\n", |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1801 | ibat_ua, vbat_uv, ocv_est_uv, pc_est, |
| 1802 | soc_est, n, delta_ocv_uv, chip->last_ocv_uv, |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 1803 | pc_new, soc_new, rbatt, m); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 1804 | |
| 1805 | return soc; |
| 1806 | } |
| 1807 | |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 1808 | #define IGNORE_SOC_TEMP_DECIDEG 50 |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1809 | #define IAVG_STEP_SIZE_MA 50 |
| 1810 | #define IAVG_START 600 |
| 1811 | #define SOC_ZERO 0xFF |
| 1812 | static void backup_soc_and_iavg(struct pm8921_bms_chip *chip, int batt_temp, |
| 1813 | int soc) |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1814 | { |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1815 | u8 temp; |
| 1816 | int iavg_ma = chip->prev_uuc_iavg_ma; |
| 1817 | |
| 1818 | if (iavg_ma > IAVG_START) |
| 1819 | temp = (iavg_ma - IAVG_START) / IAVG_STEP_SIZE_MA; |
| 1820 | else |
| 1821 | temp = 0; |
| 1822 | |
| 1823 | pm_bms_masked_write(chip, TEMP_IAVG_STORAGE, |
| 1824 | TEMP_IAVG_STORAGE_USE_MASK, temp); |
| 1825 | |
| 1826 | /* since only 6 bits are available for SOC, we store half the soc */ |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 1827 | if (soc == 0) |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1828 | temp = SOC_ZERO; |
| 1829 | else |
| 1830 | temp = soc; |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1831 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1832 | /* don't store soc if temperature is below 5degC */ |
| 1833 | if (batt_temp > IGNORE_SOC_TEMP_DECIDEG) |
| 1834 | pm8xxx_writeb(the_chip->dev->parent, TEMP_SOC_STORAGE, temp); |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1835 | } |
| 1836 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1837 | static void read_shutdown_soc_and_iavg(struct pm8921_bms_chip *chip) |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1838 | { |
| 1839 | int rc; |
| 1840 | u8 temp; |
| 1841 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1842 | rc = pm8xxx_readb(chip->dev->parent, TEMP_IAVG_STORAGE, &temp); |
| 1843 | if (rc) { |
| 1844 | pr_err("failed to read addr = %d %d assuming %d\n", |
| 1845 | TEMP_IAVG_STORAGE, rc, IAVG_START); |
| 1846 | chip->shutdown_iavg_ua = IAVG_START; |
| 1847 | } else { |
| 1848 | temp &= TEMP_IAVG_STORAGE_USE_MASK; |
| 1849 | |
| 1850 | if (temp == 0) { |
| 1851 | chip->shutdown_iavg_ua = IAVG_START; |
| 1852 | } else { |
| 1853 | chip->shutdown_iavg_ua = IAVG_START |
| 1854 | + IAVG_STEP_SIZE_MA * (temp + 1); |
| 1855 | } |
| 1856 | } |
| 1857 | |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1858 | rc = pm8xxx_readb(chip->dev->parent, TEMP_SOC_STORAGE, &temp); |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1859 | if (rc) { |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1860 | pr_err("failed to read addr = %d %d\n", TEMP_SOC_STORAGE, rc); |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1861 | } else { |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1862 | chip->shutdown_soc = temp; |
| 1863 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1864 | if (chip->shutdown_soc == 0) { |
| 1865 | pr_debug("No shutdown soc available\n"); |
| 1866 | shutdown_soc_invalid = 1; |
| 1867 | chip->shutdown_iavg_ua = 0; |
| 1868 | } else if (chip->shutdown_soc == SOC_ZERO) { |
| 1869 | chip->shutdown_soc = 0; |
| 1870 | } |
| 1871 | } |
Abhijeet Dharmapurikar | 1f4cc51 | 2012-07-21 00:10:39 -0700 | [diff] [blame] | 1872 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1873 | if (chip->ignore_shutdown_soc) { |
| 1874 | shutdown_soc_invalid = 1; |
| 1875 | chip->shutdown_soc = 0; |
| 1876 | chip->shutdown_iavg_ua = 0; |
| 1877 | } |
| 1878 | |
| 1879 | pr_debug("shutdown_soc = %d shutdown_iavg = %d shutdown_soc_invalid = %d\n", |
| 1880 | chip->shutdown_soc, |
| 1881 | chip->shutdown_iavg_ua, |
| 1882 | shutdown_soc_invalid); |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 1883 | } |
| 1884 | |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 1885 | #define SOC_CATCHUP_SEC_MAX 600 |
| 1886 | #define SOC_CATCHUP_SEC_PER_PERCENT 60 |
| 1887 | #define MAX_CATCHUP_SOC (SOC_CATCHUP_SEC_MAX/SOC_CATCHUP_SEC_PER_PERCENT) |
| 1888 | static int scale_soc_while_chg(struct pm8921_bms_chip *chip, |
| 1889 | int delta_time_us, int new_soc, int prev_soc) |
| 1890 | { |
| 1891 | int chg_time_sec; |
| 1892 | int catch_up_sec; |
| 1893 | int scaled_soc; |
| 1894 | int numerator; |
| 1895 | |
| 1896 | /* |
| 1897 | * The device must be charging for reporting a higher soc, if |
| 1898 | * not ignore this soc and continue reporting the prev_soc. |
| 1899 | * Also don't report a high value immediately slowly scale the |
| 1900 | * value from prev_soc to the new soc based on a charge time |
| 1901 | * weighted average |
| 1902 | */ |
| 1903 | |
| 1904 | /* if we are not charging return last soc */ |
| 1905 | if (the_chip->start_percent == -EINVAL) |
| 1906 | return prev_soc; |
| 1907 | |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 1908 | chg_time_sec = DIV_ROUND_UP(the_chip->charge_time_us, USEC_PER_SEC); |
| 1909 | catch_up_sec = DIV_ROUND_UP(the_chip->catch_up_time_us, USEC_PER_SEC); |
| 1910 | pr_debug("cts= %d catch_up_sec = %d\n", chg_time_sec, catch_up_sec); |
| 1911 | |
| 1912 | /* |
| 1913 | * if we have been charging for more than catch_up time simply return |
| 1914 | * new soc |
| 1915 | */ |
| 1916 | if (chg_time_sec > catch_up_sec) |
| 1917 | return new_soc; |
| 1918 | |
| 1919 | numerator = (catch_up_sec - chg_time_sec) * prev_soc |
| 1920 | + chg_time_sec * new_soc; |
| 1921 | scaled_soc = numerator / catch_up_sec; |
| 1922 | |
| 1923 | pr_debug("cts = %d new_soc = %d prev_soc = %d scaled_soc = %d\n", |
| 1924 | chg_time_sec, new_soc, prev_soc, scaled_soc); |
| 1925 | |
| 1926 | return scaled_soc; |
| 1927 | } |
| 1928 | |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 1929 | static bool is_shutdown_soc_within_limits(struct pm8921_bms_chip *chip, int soc) |
| 1930 | { |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1931 | if (shutdown_soc_invalid) { |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 1932 | pr_debug("NOT forcing shutdown soc = %d\n", chip->shutdown_soc); |
| 1933 | return 0; |
| 1934 | } |
| 1935 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 1936 | if (abs(chip->shutdown_soc - soc) > chip->shutdown_soc_valid_limit) { |
| 1937 | pr_debug("rejecting shutdown soc = %d, soc = %d limit = %d\n", |
| 1938 | chip->shutdown_soc, soc, |
| 1939 | chip->shutdown_soc_valid_limit); |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 1940 | shutdown_soc_invalid = 1; |
| 1941 | return 0; |
| 1942 | } |
| 1943 | |
| 1944 | return 1; |
| 1945 | } |
Abhijeet Dharmapurikar | 0622a43 | 2012-08-28 16:34:18 -0700 | [diff] [blame] | 1946 | |
| 1947 | static void update_power_supply(struct pm8921_bms_chip *chip) |
| 1948 | { |
| 1949 | if (chip->batt_psy == NULL || chip->batt_psy < 0) |
| 1950 | chip->batt_psy = power_supply_get_by_name("battery"); |
| 1951 | |
| 1952 | if (chip->batt_psy > 0) |
| 1953 | power_supply_changed(chip->batt_psy); |
| 1954 | } |
| 1955 | |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1956 | /* |
| 1957 | * Remaining Usable Charge = remaining_charge (charge at ocv instance) |
| 1958 | * - coloumb counter charge |
| 1959 | * - unusable charge (due to battery resistance) |
| 1960 | * SOC% = (remaining usable charge/ fcc - usable_charge); |
| 1961 | */ |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1962 | static int calculate_state_of_charge(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1963 | struct pm8921_soc_params *raw, |
| 1964 | int batt_temp, int chargecycles) |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1965 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1966 | int remaining_usable_charge_uah, fcc_uah, unusable_charge_uah; |
| 1967 | int remaining_charge_uah, soc; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1968 | int cc_uah; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1969 | int rbatt; |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1970 | int iavg_ua; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1971 | int delta_time_s; |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 1972 | int new_ocv; |
Abhijeet Dharmapurikar | 6f42a23 | 2012-07-17 22:11:13 -0700 | [diff] [blame] | 1973 | int new_rc_uah; |
| 1974 | int new_ucc_uah; |
| 1975 | int new_rbatt; |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 1976 | int shutdown_soc; |
Abhijeet Dharmapurikar | 0622a43 | 2012-08-28 16:34:18 -0700 | [diff] [blame] | 1977 | int new_calculated_soc; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1978 | static int firsttime = 1; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1979 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1980 | calculate_soc_params(chip, raw, batt_temp, chargecycles, |
| 1981 | &fcc_uah, |
| 1982 | &unusable_charge_uah, |
| 1983 | &remaining_charge_uah, |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 1984 | &cc_uah, |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 1985 | &rbatt, |
| 1986 | &iavg_ua, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 1987 | &delta_time_s); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1988 | |
| 1989 | /* calculate remaining usable charge */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1990 | remaining_usable_charge_uah = remaining_charge_uah |
| 1991 | - cc_uah |
| 1992 | - unusable_charge_uah; |
| 1993 | |
| 1994 | pr_debug("RUC = %duAh\n", remaining_usable_charge_uah); |
Abhijeet Dharmapurikar | bbae8831 | 2012-02-14 18:56:42 -0800 | [diff] [blame] | 1995 | if (fcc_uah - unusable_charge_uah <= 0) { |
| 1996 | pr_warn("FCC = %duAh, UUC = %duAh forcing soc = 0\n", |
| 1997 | fcc_uah, unusable_charge_uah); |
| 1998 | soc = 0; |
| 1999 | } else { |
Abhijeet Dharmapurikar | 4ff213c | 2012-07-11 21:28:29 -0700 | [diff] [blame] | 2000 | soc = DIV_ROUND_CLOSEST((remaining_usable_charge_uah * 100), |
| 2001 | (fcc_uah - unusable_charge_uah)); |
Abhijeet Dharmapurikar | bbae8831 | 2012-02-14 18:56:42 -0800 | [diff] [blame] | 2002 | } |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2003 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 2004 | if (firsttime && soc < 0) { |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2005 | /* |
| 2006 | * first time calcualtion and the pon ocv is too low resulting |
| 2007 | * in a bad soc. Adjust ocv such that we get 0 soc |
| 2008 | */ |
| 2009 | pr_debug("soc is %d, adjusting pon ocv to make it 0\n", soc); |
| 2010 | adjust_rc_and_uuc_for_specific_soc( |
| 2011 | chip, |
| 2012 | batt_temp, chargecycles, |
| 2013 | 0, |
| 2014 | fcc_uah, unusable_charge_uah, |
| 2015 | cc_uah, remaining_charge_uah, |
| 2016 | rbatt, |
| 2017 | &new_ocv, |
| 2018 | &new_rc_uah, &new_ucc_uah, |
| 2019 | &new_rbatt); |
| 2020 | chip->last_ocv_uv = new_ocv; |
| 2021 | remaining_charge_uah = new_rc_uah; |
| 2022 | unusable_charge_uah = new_ucc_uah; |
| 2023 | rbatt = new_rbatt; |
| 2024 | |
| 2025 | remaining_usable_charge_uah = remaining_charge_uah |
| 2026 | - cc_uah |
| 2027 | - unusable_charge_uah; |
| 2028 | |
| 2029 | soc = DIV_ROUND_CLOSEST((remaining_usable_charge_uah * 100), |
| 2030 | (fcc_uah - unusable_charge_uah)); |
| 2031 | pr_debug("DONE for O soc is %d, pon ocv adjusted to %duV\n", |
| 2032 | soc, chip->last_ocv_uv); |
| 2033 | } |
| 2034 | |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 2035 | if (soc > 100) |
| 2036 | soc = 100; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 2037 | |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 2038 | if (soc < 0) { |
Abhijeet Dharmapurikar | 21ebadd | 2011-09-28 21:14:16 -0700 | [diff] [blame] | 2039 | pr_err("bad rem_usb_chg = %d rem_chg %d," |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2040 | "cc_uah %d, unusb_chg %d\n", |
| 2041 | remaining_usable_charge_uah, |
| 2042 | remaining_charge_uah, |
| 2043 | cc_uah, unusable_charge_uah); |
| 2044 | |
Abhijeet Dharmapurikar | 21ebadd | 2011-09-28 21:14:16 -0700 | [diff] [blame] | 2045 | pr_err("for bad rem_usb_chg last_ocv_uv = %d" |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 2046 | "chargecycles = %d, batt_temp = %d" |
| 2047 | "fcc = %d soc =%d\n", |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2048 | chip->last_ocv_uv, chargecycles, batt_temp, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2049 | fcc_uah, soc); |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 2050 | soc = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2051 | } |
| 2052 | |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2053 | mutex_lock(&soc_invalidation_mutex); |
| 2054 | shutdown_soc = chip->shutdown_soc; |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2055 | |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 2056 | if (firsttime && soc != shutdown_soc |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2057 | && is_shutdown_soc_within_limits(chip, soc)) { |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2058 | /* |
| 2059 | * soc for the first time - use shutdown soc |
| 2060 | * to adjust pon ocv since it is a small percent away from |
| 2061 | * the real soc |
| 2062 | */ |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2063 | pr_debug("soc = %d before forcing shutdown_soc = %d\n", |
| 2064 | soc, shutdown_soc); |
| 2065 | adjust_rc_and_uuc_for_specific_soc( |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2066 | chip, |
| 2067 | batt_temp, chargecycles, |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2068 | shutdown_soc, |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2069 | fcc_uah, unusable_charge_uah, |
| 2070 | cc_uah, remaining_charge_uah, |
| 2071 | rbatt, |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2072 | &new_ocv, |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2073 | &new_rc_uah, &new_ucc_uah, |
| 2074 | &new_rbatt); |
| 2075 | |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2076 | chip->pon_ocv_uv = chip->last_ocv_uv; |
| 2077 | chip->last_ocv_uv = new_ocv; |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2078 | remaining_charge_uah = new_rc_uah; |
| 2079 | unusable_charge_uah = new_ucc_uah; |
| 2080 | rbatt = new_rbatt; |
| 2081 | |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2082 | remaining_usable_charge_uah = remaining_charge_uah |
| 2083 | - cc_uah |
| 2084 | - unusable_charge_uah; |
| 2085 | |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2086 | soc = DIV_ROUND_CLOSEST((remaining_usable_charge_uah * 100), |
| 2087 | (fcc_uah - unusable_charge_uah)); |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2088 | |
| 2089 | pr_debug("DONE for shutdown_soc = %d soc is %d, adjusted ocv to %duV\n", |
| 2090 | shutdown_soc, soc, chip->last_ocv_uv); |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2091 | } |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2092 | mutex_unlock(&soc_invalidation_mutex); |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2093 | |
Abhijeet Dharmapurikar | 0eb50ee | 2012-08-14 13:26:48 -0700 | [diff] [blame] | 2094 | pr_debug("SOC before adjustment = %d\n", soc); |
Abhijeet Dharmapurikar | 0622a43 | 2012-08-28 16:34:18 -0700 | [diff] [blame] | 2095 | new_calculated_soc = adjust_soc(chip, soc, batt_temp, chargecycles, |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 2096 | rbatt, fcc_uah, unusable_charge_uah, cc_uah); |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 2097 | |
Abhijeet Dharmapurikar | 0622a43 | 2012-08-28 16:34:18 -0700 | [diff] [blame] | 2098 | pr_debug("calculated SOC = %d\n", new_calculated_soc); |
| 2099 | if (new_calculated_soc != calculated_soc) |
| 2100 | update_power_supply(chip); |
| 2101 | |
| 2102 | calculated_soc = new_calculated_soc; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 2103 | firsttime = 0; |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 2104 | return calculated_soc; |
| 2105 | } |
| 2106 | |
| 2107 | #define CALCULATE_SOC_MS 20000 |
| 2108 | static void calculate_soc_work(struct work_struct *work) |
| 2109 | { |
| 2110 | struct pm8921_bms_chip *chip = container_of(work, |
| 2111 | struct pm8921_bms_chip, |
| 2112 | calculate_soc_delayed_work.work); |
| 2113 | int batt_temp, rc; |
| 2114 | struct pm8xxx_adc_chan_result result; |
| 2115 | struct pm8921_soc_params raw; |
| 2116 | int soc; |
| 2117 | |
| 2118 | rc = pm8xxx_adc_read(chip->batt_temp_channel, &result); |
| 2119 | if (rc) { |
| 2120 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 2121 | chip->batt_temp_channel, rc); |
| 2122 | return; |
| 2123 | } |
| 2124 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 2125 | result.measurement); |
| 2126 | batt_temp = (int)result.physical; |
| 2127 | |
| 2128 | mutex_lock(&chip->last_ocv_uv_mutex); |
| 2129 | read_soc_params_raw(chip, &raw); |
| 2130 | |
| 2131 | soc = calculate_state_of_charge(chip, &raw, |
| 2132 | batt_temp, last_chargecycles); |
| 2133 | mutex_unlock(&chip->last_ocv_uv_mutex); |
| 2134 | |
| 2135 | schedule_delayed_work(&chip->calculate_soc_delayed_work, |
| 2136 | round_jiffies_relative(msecs_to_jiffies |
| 2137 | (CALCULATE_SOC_MS))); |
| 2138 | } |
| 2139 | |
| 2140 | static int report_state_of_charge(struct pm8921_bms_chip *chip) |
| 2141 | { |
| 2142 | int soc = calculated_soc; |
| 2143 | int delta_time_us; |
| 2144 | struct timespec now; |
| 2145 | struct pm8xxx_adc_chan_result result; |
| 2146 | int batt_temp; |
| 2147 | int rc; |
| 2148 | |
Abhijeet Dharmapurikar | d02bd88 | 2012-08-22 17:48:16 -0700 | [diff] [blame] | 2149 | if (bms_fake_battery != -EINVAL) { |
| 2150 | pr_debug("Returning Fake SOC = %d%%\n", bms_fake_battery); |
| 2151 | return bms_fake_battery; |
| 2152 | } |
| 2153 | |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 2154 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
| 2155 | if (rc) { |
| 2156 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 2157 | the_chip->batt_temp_channel, rc); |
| 2158 | return rc; |
| 2159 | } |
| 2160 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 2161 | result.measurement); |
| 2162 | batt_temp = (int)result.physical; |
| 2163 | |
| 2164 | do_posix_clock_monotonic_gettime(&now); |
| 2165 | if (chip->t_soc_queried.tv_sec != 0) { |
| 2166 | delta_time_us |
| 2167 | = (now.tv_sec - chip->t_soc_queried.tv_sec) * USEC_PER_SEC |
| 2168 | + (now.tv_nsec - chip->t_soc_queried.tv_nsec) / 1000; |
| 2169 | } else { |
| 2170 | /* calculation for the first time */ |
| 2171 | delta_time_us = 0; |
| 2172 | } |
| 2173 | |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 2174 | /* |
| 2175 | * account for charge time - limit it to SOC_CATCHUP_SEC to |
| 2176 | * avoid overflows when charging continues for extended periods |
| 2177 | */ |
| 2178 | if (the_chip->start_percent != -EINVAL) { |
| 2179 | if (the_chip->charge_time_us == 0) { |
| 2180 | /* |
| 2181 | * calculating soc for the first time |
| 2182 | * after start of chg. Initialize catchup time |
| 2183 | */ |
| 2184 | if (abs(soc - last_soc) < MAX_CATCHUP_SOC) |
| 2185 | the_chip->catch_up_time_us = |
| 2186 | (soc - last_soc) * SOC_CATCHUP_SEC_PER_PERCENT |
| 2187 | * USEC_PER_SEC; |
| 2188 | else |
| 2189 | the_chip->catch_up_time_us = |
| 2190 | SOC_CATCHUP_SEC_MAX * USEC_PER_SEC; |
| 2191 | |
| 2192 | if (the_chip->catch_up_time_us < 0) |
| 2193 | the_chip->catch_up_time_us = 0; |
| 2194 | } |
| 2195 | |
| 2196 | /* add charge time */ |
| 2197 | if (the_chip->charge_time_us |
| 2198 | < SOC_CATCHUP_SEC_MAX * USEC_PER_SEC) |
| 2199 | chip->charge_time_us += delta_time_us; |
| 2200 | |
| 2201 | /* end catchup if calculated soc and last soc are same */ |
| 2202 | if (last_soc == soc) |
| 2203 | the_chip->catch_up_time_us = 0; |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 2204 | } |
| 2205 | |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 2206 | /* last_soc < soc ... scale and catch up */ |
| 2207 | if (last_soc != -EINVAL && last_soc < soc && soc != 100) |
| 2208 | soc = scale_soc_while_chg(chip, delta_time_us, soc, last_soc); |
| 2209 | |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 2210 | last_soc = soc; |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 2211 | backup_soc_and_iavg(chip, batt_temp, last_soc); |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 2212 | pr_debug("Reported SOC = %d\n", last_soc); |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 2213 | chip->t_soc_queried = now; |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 2214 | |
| 2215 | return last_soc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2216 | } |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 2217 | |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2218 | void pm8921_bms_invalidate_shutdown_soc(void) |
| 2219 | { |
| 2220 | int calculate_soc = 0; |
| 2221 | struct pm8921_bms_chip *chip = the_chip; |
| 2222 | int batt_temp, rc; |
| 2223 | struct pm8xxx_adc_chan_result result; |
| 2224 | struct pm8921_soc_params raw; |
| 2225 | int soc; |
| 2226 | |
| 2227 | pr_debug("Invalidating shutdown soc - the battery was removed\n"); |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 2228 | if (shutdown_soc_invalid) |
| 2229 | return; |
| 2230 | |
Abhijeet Dharmapurikar | d74be6b | 2012-07-21 00:02:42 -0700 | [diff] [blame] | 2231 | mutex_lock(&soc_invalidation_mutex); |
| 2232 | shutdown_soc_invalid = 1; |
| 2233 | last_soc = -EINVAL; |
| 2234 | if (the_chip) { |
| 2235 | /* reset to pon ocv undoing what the adjusting did */ |
| 2236 | if (the_chip->pon_ocv_uv) { |
| 2237 | the_chip->last_ocv_uv = the_chip->pon_ocv_uv; |
| 2238 | calculate_soc = 1; |
| 2239 | pr_debug("resetting ocv to pon_ocv = %d\n", |
| 2240 | the_chip->pon_ocv_uv); |
| 2241 | } |
| 2242 | } |
| 2243 | mutex_unlock(&soc_invalidation_mutex); |
| 2244 | if (!calculate_soc) |
| 2245 | return; |
| 2246 | |
| 2247 | rc = pm8xxx_adc_read(chip->batt_temp_channel, &result); |
| 2248 | if (rc) { |
| 2249 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 2250 | chip->batt_temp_channel, rc); |
| 2251 | return; |
| 2252 | } |
| 2253 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 2254 | result.measurement); |
| 2255 | batt_temp = (int)result.physical; |
| 2256 | |
| 2257 | mutex_lock(&chip->last_ocv_uv_mutex); |
| 2258 | read_soc_params_raw(chip, &raw); |
| 2259 | |
| 2260 | soc = calculate_state_of_charge(chip, &raw, |
| 2261 | batt_temp, last_chargecycles); |
| 2262 | mutex_unlock(&chip->last_ocv_uv_mutex); |
| 2263 | } |
| 2264 | EXPORT_SYMBOL(pm8921_bms_invalidate_shutdown_soc); |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 2265 | |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2266 | #define MIN_DELTA_625_UV 1000 |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2267 | static void calib_hkadc(struct pm8921_bms_chip *chip) |
| 2268 | { |
| 2269 | int voltage, rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2270 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2271 | int usb_chg; |
| 2272 | int this_delta; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2273 | |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 2274 | mutex_lock(&chip->calib_mutex); |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2275 | rc = pm8xxx_adc_read(the_chip->ref1p25v_channel, &result); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2276 | if (rc) { |
| 2277 | pr_err("ADC failed for 1.25volts rc = %d\n", rc); |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 2278 | goto out; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2279 | } |
Abhijeet Dharmapurikar | 619cb0c | 2011-12-15 15:28:14 -0800 | [diff] [blame] | 2280 | voltage = xoadc_reading_to_microvolt(result.adc_code); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2281 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 2282 | pr_debug("result 1.25v = 0x%x, voltage = %duV adc_meas = %lld\n", |
| 2283 | result.adc_code, voltage, result.measurement); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2284 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2285 | chip->xoadc_v125 = voltage; |
| 2286 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2287 | rc = pm8xxx_adc_read(the_chip->ref625mv_channel, &result); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2288 | if (rc) { |
| 2289 | pr_err("ADC failed for 1.25volts rc = %d\n", rc); |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 2290 | goto out; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2291 | } |
Abhijeet Dharmapurikar | 619cb0c | 2011-12-15 15:28:14 -0800 | [diff] [blame] | 2292 | voltage = xoadc_reading_to_microvolt(result.adc_code); |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2293 | |
Abhijeet Dharmapurikar | 9e94898 | 2012-08-28 15:21:23 -0700 | [diff] [blame] | 2294 | usb_chg = usb_chg_plugged_in(chip); |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2295 | pr_debug("result 0.625V = 0x%x, voltage = %duV adc_meas = %lld " |
| 2296 | "usb_chg = %d\n", |
| 2297 | result.adc_code, voltage, result.measurement, |
| 2298 | usb_chg); |
| 2299 | |
| 2300 | if (usb_chg) |
| 2301 | chip->xoadc_v0625_usb_present = voltage; |
| 2302 | else |
| 2303 | chip->xoadc_v0625_usb_absent = voltage; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2304 | |
| 2305 | chip->xoadc_v0625 = voltage; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2306 | if (chip->xoadc_v0625_usb_present && chip->xoadc_v0625_usb_absent) { |
| 2307 | this_delta = chip->xoadc_v0625_usb_present |
| 2308 | - chip->xoadc_v0625_usb_absent; |
| 2309 | pr_debug("this_delta= %duV\n", this_delta); |
| 2310 | if (this_delta > MIN_DELTA_625_UV) |
| 2311 | last_usb_cal_delta_uv = this_delta; |
| 2312 | pr_debug("625V_present= %d, 625V_absent= %d, delta = %duV\n", |
| 2313 | chip->xoadc_v0625_usb_present, |
| 2314 | chip->xoadc_v0625_usb_absent, |
| 2315 | last_usb_cal_delta_uv); |
| 2316 | } |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 2317 | out: |
| 2318 | mutex_unlock(&chip->calib_mutex); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2319 | } |
| 2320 | |
| 2321 | static void calibrate_hkadc_work(struct work_struct *work) |
| 2322 | { |
| 2323 | struct pm8921_bms_chip *chip = container_of(work, |
| 2324 | struct pm8921_bms_chip, calib_hkadc_work); |
| 2325 | |
| 2326 | calib_hkadc(chip); |
| 2327 | } |
| 2328 | |
Abhijeet Dharmapurikar | 1b8e829 | 2012-01-17 11:01:44 -0800 | [diff] [blame] | 2329 | void pm8921_bms_calibrate_hkadc(void) |
| 2330 | { |
| 2331 | schedule_work(&the_chip->calib_hkadc_work); |
| 2332 | } |
| 2333 | |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 2334 | #define HKADC_CALIB_DELAY_MS 600000 |
| 2335 | static void calibrate_hkadc_delayed_work(struct work_struct *work) |
| 2336 | { |
| 2337 | struct pm8921_bms_chip *chip = container_of(work, |
| 2338 | struct pm8921_bms_chip, |
| 2339 | calib_hkadc_delayed_work.work); |
| 2340 | |
| 2341 | calib_hkadc(chip); |
| 2342 | schedule_delayed_work(&chip->calib_hkadc_delayed_work, |
| 2343 | round_jiffies_relative(msecs_to_jiffies |
| 2344 | (HKADC_CALIB_DELAY_MS))); |
| 2345 | } |
| 2346 | |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 2347 | int pm8921_bms_get_vsense_avg(int *result) |
| 2348 | { |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2349 | int rc = -EINVAL; |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2350 | |
| 2351 | if (the_chip) { |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2352 | mutex_lock(&the_chip->bms_output_lock); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2353 | pm_bms_lock_output_data(the_chip); |
| 2354 | rc = read_vsense_avg(the_chip, result); |
| 2355 | pm_bms_unlock_output_data(the_chip); |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2356 | mutex_unlock(&the_chip->bms_output_lock); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2357 | } |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 2358 | |
| 2359 | pr_err("called before initialization\n"); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2360 | return rc; |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 2361 | } |
| 2362 | EXPORT_SYMBOL(pm8921_bms_get_vsense_avg); |
| 2363 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 2364 | int pm8921_bms_get_battery_current(int *result_ua) |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 2365 | { |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 2366 | int vsense; |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2367 | |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 2368 | if (!the_chip) { |
| 2369 | pr_err("called before initialization\n"); |
| 2370 | return -EINVAL; |
| 2371 | } |
| 2372 | if (the_chip->r_sense == 0) { |
| 2373 | pr_err("r_sense is zero\n"); |
| 2374 | return -EINVAL; |
| 2375 | } |
| 2376 | |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2377 | mutex_lock(&the_chip->bms_output_lock); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2378 | pm_bms_lock_output_data(the_chip); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 2379 | read_vsense_avg(the_chip, &vsense); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 2380 | pm_bms_unlock_output_data(the_chip); |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2381 | mutex_unlock(&the_chip->bms_output_lock); |
| 2382 | pr_debug("vsense=%duV\n", vsense); |
Abhijeet Dharmapurikar | a7a1c6b | 2011-08-17 10:04:58 -0700 | [diff] [blame] | 2383 | /* cast for signed division */ |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 2384 | *result_ua = vsense * 1000 / (int)the_chip->r_sense; |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2385 | pr_debug("ibat=%duA\n", *result_ua); |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 2386 | return 0; |
| 2387 | } |
| 2388 | EXPORT_SYMBOL(pm8921_bms_get_battery_current); |
| 2389 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2390 | int pm8921_bms_get_percent_charge(void) |
| 2391 | { |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 2392 | if (!the_chip) { |
| 2393 | pr_err("called before initialization\n"); |
| 2394 | return -EINVAL; |
| 2395 | } |
| 2396 | |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 2397 | return report_state_of_charge(the_chip); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2398 | } |
| 2399 | EXPORT_SYMBOL_GPL(pm8921_bms_get_percent_charge); |
| 2400 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2401 | int pm8921_bms_get_rbatt(void) |
| 2402 | { |
| 2403 | int batt_temp, rc; |
| 2404 | struct pm8xxx_adc_chan_result result; |
| 2405 | struct pm8921_soc_params raw; |
| 2406 | int fcc_uah; |
| 2407 | int unusable_charge_uah; |
| 2408 | int remaining_charge_uah; |
| 2409 | int cc_uah; |
| 2410 | int rbatt; |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 2411 | int iavg_ua; |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 2412 | int delta_time_s; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2413 | |
| 2414 | if (!the_chip) { |
| 2415 | pr_err("called before initialization\n"); |
| 2416 | return -EINVAL; |
| 2417 | } |
| 2418 | |
| 2419 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
| 2420 | if (rc) { |
| 2421 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 2422 | the_chip->batt_temp_channel, rc); |
| 2423 | return rc; |
| 2424 | } |
| 2425 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 2426 | result.measurement); |
| 2427 | batt_temp = (int)result.physical; |
| 2428 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2429 | mutex_lock(&the_chip->last_ocv_uv_mutex); |
| 2430 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2431 | read_soc_params_raw(the_chip, &raw); |
| 2432 | |
| 2433 | calculate_soc_params(the_chip, &raw, batt_temp, last_chargecycles, |
| 2434 | &fcc_uah, |
| 2435 | &unusable_charge_uah, |
| 2436 | &remaining_charge_uah, |
| 2437 | &cc_uah, |
Abhijeet Dharmapurikar | 30f30f7 | 2012-04-26 17:34:18 -0700 | [diff] [blame] | 2438 | &rbatt, |
| 2439 | &iavg_ua, |
Abhijeet Dharmapurikar | 1658215 | 2012-07-14 19:55:17 -0700 | [diff] [blame] | 2440 | &delta_time_s); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2441 | mutex_unlock(&the_chip->last_ocv_uv_mutex); |
| 2442 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2443 | return rbatt; |
| 2444 | } |
| 2445 | EXPORT_SYMBOL_GPL(pm8921_bms_get_rbatt); |
| 2446 | |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 2447 | int pm8921_bms_get_fcc(void) |
| 2448 | { |
| 2449 | int batt_temp, rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2450 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 2451 | |
| 2452 | if (!the_chip) { |
| 2453 | pr_err("called before initialization\n"); |
| 2454 | return -EINVAL; |
| 2455 | } |
| 2456 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2457 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 2458 | if (rc) { |
| 2459 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 2460 | the_chip->batt_temp_channel, rc); |
| 2461 | return rc; |
| 2462 | } |
| 2463 | pr_debug("batt_temp phy = %lld meas = 0x%llx", result.physical, |
| 2464 | result.measurement); |
| 2465 | batt_temp = (int)result.physical; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2466 | return calculate_fcc_uah(the_chip, batt_temp, last_chargecycles); |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 2467 | } |
| 2468 | EXPORT_SYMBOL_GPL(pm8921_bms_get_fcc); |
| 2469 | |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 2470 | #define IBAT_TOL_MASK 0x0F |
| 2471 | #define OCV_TOL_MASK 0xF0 |
| 2472 | #define IBAT_TOL_DEFAULT 0x03 |
| 2473 | #define IBAT_TOL_NOCHG 0x0F |
Abhijeet Dharmapurikar | c99f586 | 2012-03-14 19:33:16 -0700 | [diff] [blame] | 2474 | #define OCV_TOL_DEFAULT 0x20 |
| 2475 | #define OCV_TOL_NO_OCV 0x00 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2476 | void pm8921_bms_charging_began(void) |
| 2477 | { |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 2478 | struct pm8921_soc_params raw; |
| 2479 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2480 | mutex_lock(&the_chip->last_ocv_uv_mutex); |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 2481 | read_soc_params_raw(the_chip, &raw); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2482 | mutex_unlock(&the_chip->last_ocv_uv_mutex); |
| 2483 | |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 2484 | the_chip->start_percent = report_state_of_charge(the_chip); |
| 2485 | |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 2486 | bms_start_percent = the_chip->start_percent; |
| 2487 | bms_start_ocv_uv = raw.last_good_ocv_uv; |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 2488 | calculate_cc_uah(the_chip, raw.cc, &bms_start_cc_uah); |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 2489 | pm_bms_masked_write(the_chip, BMS_TOLERANCES, |
| 2490 | IBAT_TOL_MASK, IBAT_TOL_DEFAULT); |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 2491 | the_chip->charge_time_us = 0; |
| 2492 | the_chip->catch_up_time_us = 0; |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 2493 | |
| 2494 | the_chip->soc_at_cv = -EINVAL; |
| 2495 | the_chip->prev_chg_soc = -EINVAL; |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 2496 | pr_debug("start_percent = %u%%\n", the_chip->start_percent); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2497 | } |
| 2498 | EXPORT_SYMBOL_GPL(pm8921_bms_charging_began); |
| 2499 | |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 2500 | #define DELTA_FCC_PERCENT 3 |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2501 | #define MIN_START_PERCENT_FOR_LEARNING 30 |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 2502 | void pm8921_bms_charging_end(int is_battery_full) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2503 | { |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 2504 | int batt_temp, rc; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2505 | struct pm8xxx_adc_chan_result result; |
| 2506 | struct pm8921_soc_params raw; |
| 2507 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2508 | if (the_chip == NULL) |
| 2509 | return; |
| 2510 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2511 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
| 2512 | if (rc) { |
| 2513 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 2514 | the_chip->batt_temp_channel, rc); |
| 2515 | return; |
| 2516 | } |
| 2517 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 2518 | result.measurement); |
| 2519 | batt_temp = (int)result.physical; |
| 2520 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2521 | mutex_lock(&the_chip->last_ocv_uv_mutex); |
| 2522 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2523 | read_soc_params_raw(the_chip, &raw); |
| 2524 | |
Abhijeet Dharmapurikar | 57aeb92 | 2012-01-25 13:22:26 -0800 | [diff] [blame] | 2525 | calculate_cc_uah(the_chip, raw.cc, &bms_end_cc_uah); |
| 2526 | |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2527 | bms_end_ocv_uv = raw.last_good_ocv_uv; |
| 2528 | |
Abhijeet Dharmapurikar | e88f246 | 2012-04-25 18:22:38 -0700 | [diff] [blame] | 2529 | if (is_battery_full && the_chip->enable_fcc_learning |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2530 | && the_chip->start_percent <= MIN_START_PERCENT_FOR_LEARNING) { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2531 | int fcc_uah, new_fcc_uah, delta_fcc_uah; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 2532 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2533 | new_fcc_uah = calculate_real_fcc_uah(the_chip, &raw, |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 2534 | batt_temp, last_chargecycles, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2535 | &fcc_uah); |
| 2536 | delta_fcc_uah = new_fcc_uah - fcc_uah; |
| 2537 | if (delta_fcc_uah < 0) |
| 2538 | delta_fcc_uah = -delta_fcc_uah; |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 2539 | |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2540 | if (delta_fcc_uah * 100 > (DELTA_FCC_PERCENT * fcc_uah)) { |
| 2541 | /* new_fcc_uah is outside the scope limit it */ |
| 2542 | if (new_fcc_uah > fcc_uah) |
| 2543 | new_fcc_uah |
Abhijeet Dharmapurikar | 873ffd1 | 2012-04-17 00:06:15 -0700 | [diff] [blame] | 2544 | = (fcc_uah + |
| 2545 | (DELTA_FCC_PERCENT * fcc_uah) / 100); |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2546 | else |
| 2547 | new_fcc_uah |
Abhijeet Dharmapurikar | 873ffd1 | 2012-04-17 00:06:15 -0700 | [diff] [blame] | 2548 | = (fcc_uah - |
| 2549 | (DELTA_FCC_PERCENT * fcc_uah) / 100); |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2550 | |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 2551 | pr_debug("delta_fcc=%d > %d percent of fcc=%d" |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2552 | "restring it to %d\n", |
| 2553 | delta_fcc_uah, DELTA_FCC_PERCENT, |
| 2554 | fcc_uah, new_fcc_uah); |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 2555 | } |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 2556 | |
Abhijeet Dharmapurikar | fe36d23 | 2012-03-06 20:17:54 -0800 | [diff] [blame] | 2557 | last_real_fcc_mah = new_fcc_uah/1000; |
| 2558 | last_real_fcc_batt_temp = batt_temp; |
| 2559 | readjust_fcc_table(); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2560 | } |
| 2561 | |
| 2562 | if (is_battery_full) { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2563 | the_chip->ocv_reading_at_100 = raw.last_good_ocv_raw; |
| 2564 | the_chip->cc_reading_at_100 = raw.cc; |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2565 | |
| 2566 | the_chip->last_ocv_uv = the_chip->max_voltage_uv; |
| 2567 | raw.last_good_ocv_uv = the_chip->max_voltage_uv; |
Abhijeet Dharmapurikar | b40b96f | 2012-04-24 13:19:25 -0700 | [diff] [blame] | 2568 | /* |
| 2569 | * since we are treating this as an ocv event |
| 2570 | * forget the old cc value |
| 2571 | */ |
| 2572 | the_chip->last_cc_uah = 0; |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 2573 | pr_debug("EOC BATT_FULL ocv_reading = 0x%x cc = 0x%x\n", |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 2574 | the_chip->ocv_reading_at_100, |
| 2575 | the_chip->cc_reading_at_100); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 2576 | } |
| 2577 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2578 | the_chip->end_percent = calculate_state_of_charge(the_chip, &raw, |
| 2579 | batt_temp, last_chargecycles); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2580 | mutex_unlock(&the_chip->last_ocv_uv_mutex); |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 2581 | |
| 2582 | bms_end_percent = the_chip->end_percent; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 2583 | |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 2584 | if (the_chip->end_percent > the_chip->start_percent) { |
Abhijeet Dharmapurikar | 8a113f8 | 2012-01-19 10:58:45 -0800 | [diff] [blame] | 2585 | last_charge_increase += |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 2586 | the_chip->end_percent - the_chip->start_percent; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2587 | if (last_charge_increase > 100) { |
| 2588 | last_chargecycles++; |
| 2589 | last_charge_increase = last_charge_increase % 100; |
| 2590 | } |
| 2591 | } |
| 2592 | pr_debug("end_percent = %u%% last_charge_increase = %d" |
| 2593 | "last_chargecycles = %d\n", |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 2594 | the_chip->end_percent, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2595 | last_charge_increase, |
| 2596 | last_chargecycles); |
Abhijeet Dharmapurikar | dba91f4 | 2011-12-21 16:56:13 -0800 | [diff] [blame] | 2597 | the_chip->start_percent = -EINVAL; |
| 2598 | the_chip->end_percent = -EINVAL; |
Abhijeet Dharmapurikar | 647d0f8 | 2012-08-13 18:39:15 -0700 | [diff] [blame] | 2599 | the_chip->charge_time_us = 0; |
| 2600 | the_chip->catch_up_time_us = 0; |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 2601 | the_chip->soc_at_cv = -EINVAL; |
| 2602 | the_chip->prev_chg_soc = -EINVAL; |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 2603 | pm_bms_masked_write(the_chip, BMS_TOLERANCES, |
| 2604 | IBAT_TOL_MASK, IBAT_TOL_NOCHG); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2605 | } |
| 2606 | EXPORT_SYMBOL_GPL(pm8921_bms_charging_end); |
| 2607 | |
Abhijeet Dharmapurikar | c99f586 | 2012-03-14 19:33:16 -0700 | [diff] [blame] | 2608 | int pm8921_bms_stop_ocv_updates(struct pm8921_bms_chip *chip) |
| 2609 | { |
| 2610 | pr_debug("stopping ocv updates\n"); |
| 2611 | return pm_bms_masked_write(chip, BMS_TOLERANCES, |
| 2612 | OCV_TOL_MASK, OCV_TOL_NO_OCV); |
| 2613 | } |
| 2614 | EXPORT_SYMBOL_GPL(pm8921_bms_stop_ocv_updates); |
| 2615 | |
| 2616 | int pm8921_bms_start_ocv_updates(struct pm8921_bms_chip *chip) |
| 2617 | { |
| 2618 | pr_debug("stopping ocv updates\n"); |
| 2619 | return pm_bms_masked_write(chip, BMS_TOLERANCES, |
| 2620 | OCV_TOL_MASK, OCV_TOL_DEFAULT); |
| 2621 | } |
| 2622 | EXPORT_SYMBOL_GPL(pm8921_bms_start_ocv_updates); |
| 2623 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2624 | static irqreturn_t pm8921_bms_sbi_write_ok_handler(int irq, void *data) |
| 2625 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2626 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2627 | return IRQ_HANDLED; |
| 2628 | } |
| 2629 | |
| 2630 | static irqreturn_t pm8921_bms_cc_thr_handler(int irq, void *data) |
| 2631 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2632 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2633 | return IRQ_HANDLED; |
| 2634 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2635 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2636 | static irqreturn_t pm8921_bms_vsense_thr_handler(int irq, void *data) |
| 2637 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2638 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2639 | return IRQ_HANDLED; |
| 2640 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2641 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2642 | static irqreturn_t pm8921_bms_vsense_for_r_handler(int irq, void *data) |
| 2643 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2644 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2645 | return IRQ_HANDLED; |
| 2646 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2647 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2648 | static irqreturn_t pm8921_bms_ocv_for_r_handler(int irq, void *data) |
| 2649 | { |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2650 | struct pm8921_bms_chip *chip = data; |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2651 | |
| 2652 | pr_debug("irq = %d triggered", irq); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2653 | schedule_work(&chip->calib_hkadc_work); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2654 | return IRQ_HANDLED; |
| 2655 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2656 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2657 | static irqreturn_t pm8921_bms_good_ocv_handler(int irq, void *data) |
| 2658 | { |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2659 | struct pm8921_bms_chip *chip = data; |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2660 | |
| 2661 | pr_debug("irq = %d triggered", irq); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2662 | schedule_work(&chip->calib_hkadc_work); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2663 | return IRQ_HANDLED; |
| 2664 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2665 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2666 | static irqreturn_t pm8921_bms_vsense_avg_handler(int irq, void *data) |
| 2667 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 2668 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2669 | return IRQ_HANDLED; |
| 2670 | } |
| 2671 | |
| 2672 | struct pm_bms_irq_init_data { |
| 2673 | unsigned int irq_id; |
| 2674 | char *name; |
| 2675 | unsigned long flags; |
| 2676 | irqreturn_t (*handler)(int, void *); |
| 2677 | }; |
| 2678 | |
| 2679 | #define BMS_IRQ(_id, _flags, _handler) \ |
| 2680 | { \ |
| 2681 | .irq_id = _id, \ |
| 2682 | .name = #_id, \ |
| 2683 | .flags = _flags, \ |
| 2684 | .handler = _handler, \ |
| 2685 | } |
| 2686 | |
| 2687 | struct pm_bms_irq_init_data bms_irq_data[] = { |
| 2688 | BMS_IRQ(PM8921_BMS_SBI_WRITE_OK, IRQF_TRIGGER_RISING, |
| 2689 | pm8921_bms_sbi_write_ok_handler), |
| 2690 | BMS_IRQ(PM8921_BMS_CC_THR, IRQF_TRIGGER_RISING, |
| 2691 | pm8921_bms_cc_thr_handler), |
| 2692 | BMS_IRQ(PM8921_BMS_VSENSE_THR, IRQF_TRIGGER_RISING, |
| 2693 | pm8921_bms_vsense_thr_handler), |
| 2694 | BMS_IRQ(PM8921_BMS_VSENSE_FOR_R, IRQF_TRIGGER_RISING, |
| 2695 | pm8921_bms_vsense_for_r_handler), |
| 2696 | BMS_IRQ(PM8921_BMS_OCV_FOR_R, IRQF_TRIGGER_RISING, |
| 2697 | pm8921_bms_ocv_for_r_handler), |
| 2698 | BMS_IRQ(PM8921_BMS_GOOD_OCV, IRQF_TRIGGER_RISING, |
| 2699 | pm8921_bms_good_ocv_handler), |
| 2700 | BMS_IRQ(PM8921_BMS_VSENSE_AVG, IRQF_TRIGGER_RISING, |
| 2701 | pm8921_bms_vsense_avg_handler), |
| 2702 | }; |
| 2703 | |
| 2704 | static void free_irqs(struct pm8921_bms_chip *chip) |
| 2705 | { |
| 2706 | int i; |
| 2707 | |
| 2708 | for (i = 0; i < PM_BMS_MAX_INTS; i++) |
| 2709 | if (chip->pmic_bms_irq[i]) { |
| 2710 | free_irq(chip->pmic_bms_irq[i], NULL); |
| 2711 | chip->pmic_bms_irq[i] = 0; |
| 2712 | } |
| 2713 | } |
| 2714 | |
| 2715 | static int __devinit request_irqs(struct pm8921_bms_chip *chip, |
| 2716 | struct platform_device *pdev) |
| 2717 | { |
| 2718 | struct resource *res; |
| 2719 | int ret, i; |
| 2720 | |
| 2721 | ret = 0; |
| 2722 | bitmap_fill(chip->enabled_irqs, PM_BMS_MAX_INTS); |
| 2723 | |
| 2724 | for (i = 0; i < ARRAY_SIZE(bms_irq_data); i++) { |
| 2725 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, |
| 2726 | bms_irq_data[i].name); |
| 2727 | if (res == NULL) { |
| 2728 | pr_err("couldn't find %s\n", bms_irq_data[i].name); |
| 2729 | goto err_out; |
| 2730 | } |
| 2731 | ret = request_irq(res->start, bms_irq_data[i].handler, |
| 2732 | bms_irq_data[i].flags, |
| 2733 | bms_irq_data[i].name, chip); |
| 2734 | if (ret < 0) { |
| 2735 | pr_err("couldn't request %d (%s) %d\n", res->start, |
| 2736 | bms_irq_data[i].name, ret); |
| 2737 | goto err_out; |
| 2738 | } |
| 2739 | chip->pmic_bms_irq[bms_irq_data[i].irq_id] = res->start; |
| 2740 | pm8921_bms_disable_irq(chip, bms_irq_data[i].irq_id); |
| 2741 | } |
| 2742 | return 0; |
| 2743 | |
| 2744 | err_out: |
| 2745 | free_irqs(chip); |
| 2746 | return -EINVAL; |
| 2747 | } |
| 2748 | |
| 2749 | #define EN_BMS_BIT BIT(7) |
| 2750 | #define EN_PON_HS_BIT BIT(0) |
| 2751 | static int __devinit pm8921_bms_hw_init(struct pm8921_bms_chip *chip) |
| 2752 | { |
| 2753 | int rc; |
| 2754 | |
| 2755 | rc = pm_bms_masked_write(chip, BMS_CONTROL, |
| 2756 | EN_BMS_BIT | EN_PON_HS_BIT, EN_BMS_BIT | EN_PON_HS_BIT); |
| 2757 | if (rc) { |
| 2758 | pr_err("failed to enable pon and bms addr = %d %d", |
| 2759 | BMS_CONTROL, rc); |
| 2760 | } |
| 2761 | |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 2762 | /* The charger will call start charge later if usb is present */ |
| 2763 | pm_bms_masked_write(chip, BMS_TOLERANCES, |
| 2764 | IBAT_TOL_MASK, IBAT_TOL_NOCHG); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2765 | return 0; |
| 2766 | } |
| 2767 | |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 2768 | static void check_initial_ocv(struct pm8921_bms_chip *chip) |
| 2769 | { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2770 | int ocv_uv, rc; |
| 2771 | int16_t ocv_raw; |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2772 | int usb_chg; |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 2773 | |
| 2774 | /* |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 2775 | * Check if a ocv is available in bms hw, |
| 2776 | * if not compute it here at boot time and save it |
| 2777 | * in the last_ocv_uv. |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 2778 | */ |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2779 | ocv_uv = 0; |
| 2780 | pm_bms_read_output_data(chip, LAST_GOOD_OCV_VALUE, &ocv_raw); |
Abhijeet Dharmapurikar | 9e94898 | 2012-08-28 15:21:23 -0700 | [diff] [blame] | 2781 | usb_chg = usb_chg_plugged_in(chip); |
Abhijeet Dharmapurikar | acca418 | 2012-02-07 12:52:19 -0800 | [diff] [blame] | 2782 | rc = convert_vbatt_raw_to_uv(chip, usb_chg, ocv_raw, &ocv_uv); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2783 | if (rc || ocv_uv == 0) { |
| 2784 | rc = adc_based_ocv(chip, &ocv_uv); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 2785 | if (rc) { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2786 | pr_err("failed to read adc based ocv_uv rc = %d\n", rc); |
| 2787 | ocv_uv = DEFAULT_OCV_MICROVOLTS; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 2788 | } |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 2789 | } |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 2790 | chip->last_ocv_uv = ocv_uv; |
| 2791 | pr_debug("ocv_uv = %d last_ocv_uv = %d\n", ocv_uv, chip->last_ocv_uv); |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 2792 | } |
| 2793 | |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2794 | static int64_t read_battery_id(struct pm8921_bms_chip *chip) |
| 2795 | { |
| 2796 | int rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2797 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2798 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 2799 | rc = pm8xxx_adc_read(chip->batt_id_channel, &result); |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2800 | if (rc) { |
| 2801 | pr_err("error reading batt id channel = %d, rc = %d\n", |
| 2802 | chip->vbat_channel, rc); |
| 2803 | return rc; |
| 2804 | } |
| 2805 | pr_debug("batt_id phy = %lld meas = 0x%llx\n", result.physical, |
| 2806 | result.measurement); |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 2807 | return result.adc_code; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2808 | } |
| 2809 | |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 2810 | #define PALLADIUM_ID_MIN 0x7F40 |
| 2811 | #define PALLADIUM_ID_MAX 0x7F5A |
| 2812 | #define DESAY_5200_ID_MIN 0x7F7F |
| 2813 | #define DESAY_5200_ID_MAX 0x802F |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2814 | static int set_battery_data(struct pm8921_bms_chip *chip) |
| 2815 | { |
| 2816 | int64_t battery_id; |
| 2817 | |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 2818 | if (chip->batt_type == BATT_DESAY) |
| 2819 | goto desay; |
| 2820 | else if (chip->batt_type == BATT_PALLADIUM) |
| 2821 | goto palladium; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2822 | |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 2823 | battery_id = read_battery_id(chip); |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2824 | if (battery_id < 0) { |
| 2825 | pr_err("cannot read battery id err = %lld\n", battery_id); |
| 2826 | return battery_id; |
| 2827 | } |
| 2828 | |
| 2829 | if (is_between(PALLADIUM_ID_MIN, PALLADIUM_ID_MAX, battery_id)) { |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 2830 | goto palladium; |
| 2831 | } else if (is_between(DESAY_5200_ID_MIN, DESAY_5200_ID_MAX, |
| 2832 | battery_id)) { |
| 2833 | goto desay; |
| 2834 | } else { |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2835 | pr_warn("invalid battid, palladium 1500 assumed batt_id %llx\n", |
| 2836 | battery_id); |
| 2837 | goto palladium; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 2838 | } |
| 2839 | |
| 2840 | palladium: |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2841 | chip->fcc = palladium_1500_data.fcc; |
| 2842 | chip->fcc_temp_lut = palladium_1500_data.fcc_temp_lut; |
| 2843 | chip->fcc_sf_lut = palladium_1500_data.fcc_sf_lut; |
| 2844 | chip->pc_temp_ocv_lut = palladium_1500_data.pc_temp_ocv_lut; |
| 2845 | chip->pc_sf_lut = palladium_1500_data.pc_sf_lut; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2846 | chip->rbatt_sf_lut = palladium_1500_data.rbatt_sf_lut; |
| 2847 | chip->default_rbatt_mohm |
| 2848 | = palladium_1500_data.default_rbatt_mohm; |
Abhijeet Dharmapurikar | ded189b | 2012-03-30 10:12:28 -0700 | [diff] [blame] | 2849 | chip->delta_rbatt_mohm = palladium_1500_data.delta_rbatt_mohm; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2850 | return 0; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 2851 | desay: |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 2852 | chip->fcc = desay_5200_data.fcc; |
| 2853 | chip->fcc_temp_lut = desay_5200_data.fcc_temp_lut; |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 2854 | chip->pc_temp_ocv_lut = desay_5200_data.pc_temp_ocv_lut; |
| 2855 | chip->pc_sf_lut = desay_5200_data.pc_sf_lut; |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 2856 | chip->rbatt_sf_lut = desay_5200_data.rbatt_sf_lut; |
| 2857 | chip->default_rbatt_mohm = desay_5200_data.default_rbatt_mohm; |
Abhijeet Dharmapurikar | ded189b | 2012-03-30 10:12:28 -0700 | [diff] [blame] | 2858 | chip->delta_rbatt_mohm = desay_5200_data.delta_rbatt_mohm; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2859 | return 0; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 2860 | } |
| 2861 | |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2862 | enum bms_request_operation { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2863 | CALC_FCC, |
| 2864 | CALC_PC, |
| 2865 | CALC_SOC, |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2866 | CALIB_HKADC, |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 2867 | CALIB_CCADC, |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2868 | GET_VBAT_VSENSE_SIMULTANEOUS, |
Abhijeet Dharmapurikar | c99f586 | 2012-03-14 19:33:16 -0700 | [diff] [blame] | 2869 | STOP_OCV, |
| 2870 | START_OCV, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2871 | }; |
| 2872 | |
| 2873 | static int test_batt_temp = 5; |
| 2874 | static int test_chargecycle = 150; |
| 2875 | static int test_ocv = 3900000; |
| 2876 | enum { |
| 2877 | TEST_BATT_TEMP, |
| 2878 | TEST_CHARGE_CYCLE, |
| 2879 | TEST_OCV, |
| 2880 | }; |
| 2881 | static int get_test_param(void *data, u64 * val) |
| 2882 | { |
| 2883 | switch ((int)data) { |
| 2884 | case TEST_BATT_TEMP: |
| 2885 | *val = test_batt_temp; |
| 2886 | break; |
| 2887 | case TEST_CHARGE_CYCLE: |
| 2888 | *val = test_chargecycle; |
| 2889 | break; |
| 2890 | case TEST_OCV: |
| 2891 | *val = test_ocv; |
| 2892 | break; |
| 2893 | default: |
| 2894 | return -EINVAL; |
| 2895 | } |
| 2896 | return 0; |
| 2897 | } |
| 2898 | static int set_test_param(void *data, u64 val) |
| 2899 | { |
| 2900 | switch ((int)data) { |
| 2901 | case TEST_BATT_TEMP: |
| 2902 | test_batt_temp = (int)val; |
| 2903 | break; |
| 2904 | case TEST_CHARGE_CYCLE: |
| 2905 | test_chargecycle = (int)val; |
| 2906 | break; |
| 2907 | case TEST_OCV: |
| 2908 | test_ocv = (int)val; |
| 2909 | break; |
| 2910 | default: |
| 2911 | return -EINVAL; |
| 2912 | } |
| 2913 | return 0; |
| 2914 | } |
| 2915 | DEFINE_SIMPLE_ATTRIBUTE(temp_fops, get_test_param, set_test_param, "%llu\n"); |
| 2916 | |
| 2917 | static int get_calc(void *data, u64 * val) |
| 2918 | { |
| 2919 | int param = (int)data; |
| 2920 | int ret = 0; |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2921 | int ibat_ua, vbat_uv; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2922 | struct pm8921_soc_params raw; |
| 2923 | |
| 2924 | read_soc_params_raw(the_chip, &raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2925 | |
| 2926 | *val = 0; |
| 2927 | |
| 2928 | /* global irq number passed in via data */ |
| 2929 | switch (param) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2930 | case CALC_FCC: |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 2931 | *val = calculate_fcc_uah(the_chip, test_batt_temp, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2932 | test_chargecycle); |
| 2933 | break; |
| 2934 | case CALC_PC: |
| 2935 | *val = calculate_pc(the_chip, test_ocv, test_batt_temp, |
| 2936 | test_chargecycle); |
| 2937 | break; |
| 2938 | case CALC_SOC: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2939 | *val = calculate_state_of_charge(the_chip, &raw, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2940 | test_batt_temp, test_chargecycle); |
| 2941 | break; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 2942 | case CALIB_HKADC: |
| 2943 | /* reading this will trigger calibration */ |
| 2944 | *val = 0; |
| 2945 | calib_hkadc(the_chip); |
| 2946 | break; |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 2947 | case CALIB_CCADC: |
| 2948 | /* reading this will trigger calibration */ |
| 2949 | *val = 0; |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 2950 | pm8xxx_calib_ccadc(); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 2951 | break; |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2952 | case GET_VBAT_VSENSE_SIMULTANEOUS: |
| 2953 | /* reading this will call simultaneous vbat and vsense */ |
| 2954 | *val = |
| 2955 | pm8921_bms_get_simultaneous_battery_voltage_and_current( |
| 2956 | &ibat_ua, |
| 2957 | &vbat_uv); |
Abhijeet Dharmapurikar | c99f586 | 2012-03-14 19:33:16 -0700 | [diff] [blame] | 2958 | default: |
| 2959 | ret = -EINVAL; |
| 2960 | } |
| 2961 | return ret; |
| 2962 | } |
| 2963 | |
| 2964 | static int set_calc(void *data, u64 val) |
| 2965 | { |
| 2966 | int param = (int)data; |
| 2967 | int ret = 0; |
| 2968 | |
| 2969 | switch (param) { |
| 2970 | case STOP_OCV: |
| 2971 | pm8921_bms_stop_ocv_updates(the_chip); |
| 2972 | break; |
| 2973 | case START_OCV: |
| 2974 | pm8921_bms_start_ocv_updates(the_chip); |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 2975 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2976 | default: |
| 2977 | ret = -EINVAL; |
| 2978 | } |
| 2979 | return ret; |
| 2980 | } |
Abhijeet Dharmapurikar | c99f586 | 2012-03-14 19:33:16 -0700 | [diff] [blame] | 2981 | DEFINE_SIMPLE_ATTRIBUTE(calc_fops, get_calc, set_calc, "%llu\n"); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2982 | |
| 2983 | static int get_reading(void *data, u64 * val) |
| 2984 | { |
| 2985 | int param = (int)data; |
| 2986 | int ret = 0; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2987 | struct pm8921_soc_params raw; |
| 2988 | |
| 2989 | read_soc_params_raw(the_chip, &raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2990 | |
| 2991 | *val = 0; |
| 2992 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2993 | switch (param) { |
| 2994 | case CC_MSB: |
| 2995 | case CC_LSB: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2996 | *val = raw.cc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2997 | break; |
| 2998 | case LAST_GOOD_OCV_VALUE: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 2999 | *val = raw.last_good_ocv_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3000 | break; |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 3001 | case VSENSE_AVG: |
| 3002 | read_vsense_avg(the_chip, (uint *)val); |
| 3003 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3004 | default: |
| 3005 | ret = -EINVAL; |
| 3006 | } |
| 3007 | return ret; |
| 3008 | } |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 3009 | DEFINE_SIMPLE_ATTRIBUTE(reading_fops, get_reading, NULL, "%lld\n"); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3010 | |
| 3011 | static int get_rt_status(void *data, u64 * val) |
| 3012 | { |
| 3013 | int i = (int)data; |
| 3014 | int ret; |
| 3015 | |
| 3016 | /* global irq number passed in via data */ |
| 3017 | ret = pm_bms_get_rt_status(the_chip, i); |
| 3018 | *val = ret; |
| 3019 | return 0; |
| 3020 | } |
| 3021 | DEFINE_SIMPLE_ATTRIBUTE(rt_fops, get_rt_status, NULL, "%llu\n"); |
| 3022 | |
| 3023 | static int get_reg(void *data, u64 * val) |
| 3024 | { |
| 3025 | int addr = (int)data; |
| 3026 | int ret; |
| 3027 | u8 temp; |
| 3028 | |
| 3029 | ret = pm8xxx_readb(the_chip->dev->parent, addr, &temp); |
| 3030 | if (ret) { |
| 3031 | pr_err("pm8xxx_readb to %x value = %d errored = %d\n", |
| 3032 | addr, temp, ret); |
| 3033 | return -EAGAIN; |
| 3034 | } |
| 3035 | *val = temp; |
| 3036 | return 0; |
| 3037 | } |
| 3038 | |
| 3039 | static int set_reg(void *data, u64 val) |
| 3040 | { |
| 3041 | int addr = (int)data; |
| 3042 | int ret; |
| 3043 | u8 temp; |
| 3044 | |
| 3045 | temp = (u8) val; |
| 3046 | ret = pm8xxx_writeb(the_chip->dev->parent, addr, temp); |
| 3047 | if (ret) { |
| 3048 | pr_err("pm8xxx_writeb to %x value = %d errored = %d\n", |
| 3049 | addr, temp, ret); |
| 3050 | return -EAGAIN; |
| 3051 | } |
| 3052 | return 0; |
| 3053 | } |
| 3054 | DEFINE_SIMPLE_ATTRIBUTE(reg_fops, get_reg, set_reg, "0x%02llx\n"); |
| 3055 | |
| 3056 | static void create_debugfs_entries(struct pm8921_bms_chip *chip) |
| 3057 | { |
| 3058 | int i; |
| 3059 | |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 3060 | chip->dent = debugfs_create_dir("pm8921-bms", NULL); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3061 | |
| 3062 | if (IS_ERR(chip->dent)) { |
| 3063 | pr_err("pmic bms couldnt create debugfs dir\n"); |
| 3064 | return; |
| 3065 | } |
| 3066 | |
| 3067 | debugfs_create_file("BMS_CONTROL", 0644, chip->dent, |
| 3068 | (void *)BMS_CONTROL, ®_fops); |
| 3069 | debugfs_create_file("BMS_OUTPUT0", 0644, chip->dent, |
| 3070 | (void *)BMS_OUTPUT0, ®_fops); |
| 3071 | debugfs_create_file("BMS_OUTPUT1", 0644, chip->dent, |
| 3072 | (void *)BMS_OUTPUT1, ®_fops); |
| 3073 | debugfs_create_file("BMS_TEST1", 0644, chip->dent, |
| 3074 | (void *)BMS_TEST1, ®_fops); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3075 | |
| 3076 | debugfs_create_file("test_batt_temp", 0644, chip->dent, |
| 3077 | (void *)TEST_BATT_TEMP, &temp_fops); |
| 3078 | debugfs_create_file("test_chargecycle", 0644, chip->dent, |
| 3079 | (void *)TEST_CHARGE_CYCLE, &temp_fops); |
| 3080 | debugfs_create_file("test_ocv", 0644, chip->dent, |
| 3081 | (void *)TEST_OCV, &temp_fops); |
| 3082 | |
| 3083 | debugfs_create_file("read_cc", 0644, chip->dent, |
| 3084 | (void *)CC_MSB, &reading_fops); |
| 3085 | debugfs_create_file("read_last_good_ocv", 0644, chip->dent, |
| 3086 | (void *)LAST_GOOD_OCV_VALUE, &reading_fops); |
| 3087 | debugfs_create_file("read_vbatt_for_rbatt", 0644, chip->dent, |
| 3088 | (void *)VBATT_FOR_RBATT, &reading_fops); |
| 3089 | debugfs_create_file("read_vsense_for_rbatt", 0644, chip->dent, |
| 3090 | (void *)VSENSE_FOR_RBATT, &reading_fops); |
| 3091 | debugfs_create_file("read_ocv_for_rbatt", 0644, chip->dent, |
| 3092 | (void *)OCV_FOR_RBATT, &reading_fops); |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 3093 | debugfs_create_file("read_vsense_avg", 0644, chip->dent, |
| 3094 | (void *)VSENSE_AVG, &reading_fops); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3095 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3096 | debugfs_create_file("show_fcc", 0644, chip->dent, |
| 3097 | (void *)CALC_FCC, &calc_fops); |
| 3098 | debugfs_create_file("show_pc", 0644, chip->dent, |
| 3099 | (void *)CALC_PC, &calc_fops); |
| 3100 | debugfs_create_file("show_soc", 0644, chip->dent, |
| 3101 | (void *)CALC_SOC, &calc_fops); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 3102 | debugfs_create_file("calib_hkadc", 0644, chip->dent, |
| 3103 | (void *)CALIB_HKADC, &calc_fops); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 3104 | debugfs_create_file("calib_ccadc", 0644, chip->dent, |
| 3105 | (void *)CALIB_CCADC, &calc_fops); |
Abhijeet Dharmapurikar | c99f586 | 2012-03-14 19:33:16 -0700 | [diff] [blame] | 3106 | debugfs_create_file("stop_ocv", 0644, chip->dent, |
| 3107 | (void *)STOP_OCV, &calc_fops); |
| 3108 | debugfs_create_file("start_ocv", 0644, chip->dent, |
| 3109 | (void *)START_OCV, &calc_fops); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3110 | |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 3111 | debugfs_create_file("simultaneous", 0644, chip->dent, |
| 3112 | (void *)GET_VBAT_VSENSE_SIMULTANEOUS, &calc_fops); |
| 3113 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3114 | for (i = 0; i < ARRAY_SIZE(bms_irq_data); i++) { |
| 3115 | if (chip->pmic_bms_irq[bms_irq_data[i].irq_id]) |
| 3116 | debugfs_create_file(bms_irq_data[i].name, 0444, |
| 3117 | chip->dent, |
| 3118 | (void *)bms_irq_data[i].irq_id, |
| 3119 | &rt_fops); |
| 3120 | } |
| 3121 | } |
| 3122 | |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 3123 | #define REG_SBI_CONFIG 0x04F |
| 3124 | #define PAGE3_ENABLE_MASK 0x6 |
| 3125 | #define PROGRAM_REV_MASK 0x0F |
| 3126 | #define PROGRAM_REV 0x9 |
| 3127 | static int read_ocv_trim(struct pm8921_bms_chip *chip) |
| 3128 | { |
| 3129 | int rc; |
| 3130 | u8 reg, sbi_config; |
| 3131 | |
| 3132 | rc = pm8xxx_readb(chip->dev->parent, REG_SBI_CONFIG, &sbi_config); |
| 3133 | if (rc) { |
| 3134 | pr_err("error = %d reading sbi config reg\n", rc); |
| 3135 | return rc; |
| 3136 | } |
| 3137 | |
| 3138 | reg = sbi_config | PAGE3_ENABLE_MASK; |
| 3139 | rc = pm8xxx_writeb(chip->dev->parent, REG_SBI_CONFIG, reg); |
| 3140 | if (rc) { |
| 3141 | pr_err("error = %d writing sbi config reg\n", rc); |
| 3142 | return rc; |
| 3143 | } |
| 3144 | |
| 3145 | rc = pm8xxx_readb(chip->dev->parent, TEST_PROGRAM_REV, ®); |
| 3146 | if (rc) |
| 3147 | pr_err("Error %d reading %d addr %d\n", |
| 3148 | rc, reg, TEST_PROGRAM_REV); |
| 3149 | pr_err("program rev reg is 0x%x\n", reg); |
| 3150 | reg &= PROGRAM_REV_MASK; |
| 3151 | |
| 3152 | /* If the revision is equal or higher do not adjust trim delta */ |
| 3153 | if (reg >= PROGRAM_REV) { |
| 3154 | chip->amux_2_trim_delta = 0; |
| 3155 | goto restore_sbi_config; |
| 3156 | } |
| 3157 | |
| 3158 | rc = pm8xxx_readb(chip->dev->parent, AMUX_TRIM_2, ®); |
| 3159 | if (rc) { |
| 3160 | pr_err("error = %d reading trim reg\n", rc); |
| 3161 | return rc; |
| 3162 | } |
| 3163 | |
| 3164 | pr_err("trim reg is 0x%x\n", reg); |
| 3165 | chip->amux_2_trim_delta = abs(0x49 - reg); |
| 3166 | pr_err("trim delta is %d\n", chip->amux_2_trim_delta); |
| 3167 | |
| 3168 | restore_sbi_config: |
| 3169 | rc = pm8xxx_writeb(chip->dev->parent, REG_SBI_CONFIG, sbi_config); |
| 3170 | if (rc) { |
| 3171 | pr_err("error = %d writing sbi config reg\n", rc); |
| 3172 | return rc; |
| 3173 | } |
| 3174 | |
| 3175 | return 0; |
| 3176 | } |
| 3177 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3178 | static int __devinit pm8921_bms_probe(struct platform_device *pdev) |
| 3179 | { |
| 3180 | int rc = 0; |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 3181 | int vbatt; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3182 | struct pm8921_bms_chip *chip; |
| 3183 | const struct pm8921_bms_platform_data *pdata |
| 3184 | = pdev->dev.platform_data; |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 3185 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3186 | if (!pdata) { |
| 3187 | pr_err("missing platform data\n"); |
| 3188 | return -EINVAL; |
| 3189 | } |
| 3190 | |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 3191 | chip = kzalloc(sizeof(struct pm8921_bms_chip), GFP_KERNEL); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3192 | if (!chip) { |
| 3193 | pr_err("Cannot allocate pm_bms_chip\n"); |
| 3194 | return -ENOMEM; |
| 3195 | } |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 3196 | |
Abhijeet Dharmapurikar | c9857ca | 2012-02-07 15:56:06 -0800 | [diff] [blame] | 3197 | mutex_init(&chip->bms_output_lock); |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 3198 | mutex_init(&chip->last_ocv_uv_mutex); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3199 | chip->dev = &pdev->dev; |
| 3200 | chip->r_sense = pdata->r_sense; |
Abhijeet Dharmapurikar | a51c87b | 2012-07-13 20:13:14 -0700 | [diff] [blame] | 3201 | chip->v_cutoff = pdata->v_cutoff; |
Abhijeet Dharmapurikar | a93ede8 | 2011-11-17 12:20:03 -0800 | [diff] [blame] | 3202 | chip->max_voltage_uv = pdata->max_voltage_uv; |
Abhijeet Dharmapurikar | d6d66c7 | 2012-08-06 14:02:51 -0700 | [diff] [blame] | 3203 | chip->chg_term_ua = pdata->chg_term_ua; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 3204 | chip->batt_type = pdata->battery_type; |
Abhijeet Dharmapurikar | baffba4 | 2012-03-22 14:41:10 -0700 | [diff] [blame] | 3205 | chip->rconn_mohm = pdata->rconn_mohm; |
Abhijeet Dharmapurikar | dba91f4 | 2011-12-21 16:56:13 -0800 | [diff] [blame] | 3206 | chip->start_percent = -EINVAL; |
| 3207 | chip->end_percent = -EINVAL; |
Abhijeet Dharmapurikar | 602dc27 | 2012-07-19 21:34:56 -0700 | [diff] [blame] | 3208 | chip->shutdown_soc_valid_limit = pdata->shutdown_soc_valid_limit; |
Abhijeet Dharmapurikar | 720b00e | 2012-08-01 21:33:09 -0700 | [diff] [blame] | 3209 | chip->adjust_soc_low_threshold = pdata->adjust_soc_low_threshold; |
| 3210 | if (chip->adjust_soc_low_threshold >= 45) |
| 3211 | chip->adjust_soc_low_threshold = 45; |
| 3212 | |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 3213 | chip->prev_pc_unusable = -EINVAL; |
Abhijeet Dharmapurikar | d3c435e | 2012-08-16 19:23:18 -0700 | [diff] [blame] | 3214 | chip->soc_at_cv = -EINVAL; |
Abhijeet Dharmapurikar | 2f7f6fc | 2012-08-03 15:31:34 -0700 | [diff] [blame] | 3215 | |
Abhijeet Dharmapurikar | 1f4cc51 | 2012-07-21 00:10:39 -0700 | [diff] [blame] | 3216 | chip->ignore_shutdown_soc = pdata->ignore_shutdown_soc; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 3217 | rc = set_battery_data(chip); |
| 3218 | if (rc) { |
| 3219 | pr_err("%s bad battery data %d\n", __func__, rc); |
Abhijeet Dharmapurikar | 4a4456e | 2011-09-27 15:10:38 -0700 | [diff] [blame] | 3220 | goto free_chip; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 3221 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3222 | |
Abhijeet Dharmapurikar | f6fdcaa0 | 2012-02-27 00:10:10 -0800 | [diff] [blame] | 3223 | if (chip->pc_temp_ocv_lut == NULL) { |
| 3224 | pr_err("temp ocv lut table is NULL\n"); |
| 3225 | rc = -EINVAL; |
| 3226 | goto free_chip; |
| 3227 | } |
| 3228 | |
| 3229 | /* set defaults in the battery data */ |
| 3230 | if (chip->default_rbatt_mohm <= 0) |
| 3231 | chip->default_rbatt_mohm = DEFAULT_RBATT_MOHMS; |
| 3232 | |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 3233 | chip->batt_temp_channel = pdata->bms_cdata.batt_temp_channel; |
| 3234 | chip->vbat_channel = pdata->bms_cdata.vbat_channel; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 3235 | chip->ref625mv_channel = pdata->bms_cdata.ref625mv_channel; |
| 3236 | chip->ref1p25v_channel = pdata->bms_cdata.ref1p25v_channel; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 3237 | chip->batt_id_channel = pdata->bms_cdata.batt_id_channel; |
Abhijeet Dharmapurikar | fa77f1a | 2011-06-27 21:11:51 -0700 | [diff] [blame] | 3238 | chip->revision = pm8xxx_get_revision(chip->dev->parent); |
Abhijeet Dharmapurikar | e88f246 | 2012-04-25 18:22:38 -0700 | [diff] [blame] | 3239 | chip->enable_fcc_learning = pdata->enable_fcc_learning; |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 3240 | |
| 3241 | mutex_init(&chip->calib_mutex); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 3242 | INIT_WORK(&chip->calib_hkadc_work, calibrate_hkadc_work); |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 3243 | INIT_DELAYED_WORK(&chip->calib_hkadc_delayed_work, |
| 3244 | calibrate_hkadc_delayed_work); |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 3245 | |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 3246 | INIT_DELAYED_WORK(&chip->calculate_soc_delayed_work, |
| 3247 | calculate_soc_work); |
| 3248 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3249 | rc = request_irqs(chip, pdev); |
| 3250 | if (rc) { |
| 3251 | pr_err("couldn't register interrupts rc = %d\n", rc); |
| 3252 | goto free_chip; |
| 3253 | } |
| 3254 | |
Abhijeet Dharmapurikar | d1c761d | 2012-08-14 19:15:53 -0700 | [diff] [blame^] | 3255 | wake_lock_init(&chip->low_voltage_wake_lock, |
| 3256 | WAKE_LOCK_SUSPEND, "pm8921_bms_low"); |
| 3257 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 3258 | rc = pm8921_bms_hw_init(chip); |
| 3259 | if (rc) { |
| 3260 | pr_err("couldn't init hardware rc = %d\n", rc); |
| 3261 | goto free_irqs; |
| 3262 | } |
| 3263 | |
Abhijeet Dharmapurikar | a7daba5 | 2012-07-27 20:40:51 -0700 | [diff] [blame] | 3264 | read_shutdown_soc_and_iavg(chip); |
Abhijeet Dharmapurikar | ed2d87e | 2012-06-26 20:15:36 -0700 | [diff] [blame] | 3265 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3266 | platform_set_drvdata(pdev, chip); |
| 3267 | the_chip = chip; |
| 3268 | create_debugfs_entries(chip); |
| 3269 | |
Abhijeet Dharmapurikar | fd8655c | 2012-03-18 16:41:58 -0700 | [diff] [blame] | 3270 | rc = read_ocv_trim(chip); |
| 3271 | if (rc) { |
| 3272 | pr_err("couldn't adjust ocv_trim rc= %d\n", rc); |
| 3273 | goto free_irqs; |
| 3274 | } |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 3275 | check_initial_ocv(chip); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 3276 | |
Abhijeet Dharmapurikar | 9c0e604 | 2012-07-12 14:55:13 -0700 | [diff] [blame] | 3277 | /* start periodic hkadc calibration */ |
| 3278 | schedule_delayed_work(&chip->calib_hkadc_delayed_work, 0); |
| 3279 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 3280 | /* enable the vbatt reading interrupts for scheduling hkadc calib */ |
| 3281 | pm8921_bms_enable_irq(chip, PM8921_BMS_GOOD_OCV); |
| 3282 | pm8921_bms_enable_irq(chip, PM8921_BMS_OCV_FOR_R); |
Abhijeet Dharmapurikar | 21ebadd | 2011-09-28 21:14:16 -0700 | [diff] [blame] | 3283 | |
Abhijeet Dharmapurikar | 41b46cd | 2012-07-18 19:38:43 -0700 | [diff] [blame] | 3284 | calculate_soc_work(&(chip->calculate_soc_delayed_work.work)); |
| 3285 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 3286 | get_battery_uvolts(chip, &vbatt); |
| 3287 | pr_info("OK battery_capacity_at_boot=%d volt = %d ocv = %d\n", |
| 3288 | pm8921_bms_get_percent_charge(), |
Abhijeet Dharmapurikar | 10bc0fd | 2012-04-18 21:03:50 -0700 | [diff] [blame] | 3289 | vbatt, chip->last_ocv_uv); |
Abhijeet Dharmapurikar | 807249a | 2012-07-12 20:26:27 -0700 | [diff] [blame] | 3290 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3291 | return 0; |
| 3292 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 3293 | free_irqs: |
| 3294 | free_irqs(chip); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3295 | free_chip: |
| 3296 | kfree(chip); |
| 3297 | return rc; |
| 3298 | } |
| 3299 | |
| 3300 | static int __devexit pm8921_bms_remove(struct platform_device *pdev) |
| 3301 | { |
| 3302 | struct pm8921_bms_chip *chip = platform_get_drvdata(pdev); |
| 3303 | |
| 3304 | free_irqs(chip); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 3305 | kfree(chip->adjusted_fcc_temp_lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3306 | platform_set_drvdata(pdev, NULL); |
| 3307 | the_chip = NULL; |
| 3308 | kfree(chip); |
| 3309 | return 0; |
| 3310 | } |
| 3311 | |
Abhijeet Dharmapurikar | d1c761d | 2012-08-14 19:15:53 -0700 | [diff] [blame^] | 3312 | static int pm8921_bms_resume(struct device *dev) |
| 3313 | { |
| 3314 | int rc, ibat_ua, vbat_uv; |
| 3315 | |
| 3316 | rc = pm8921_bms_get_simultaneous_battery_voltage_and_current( |
| 3317 | &ibat_ua, |
| 3318 | &vbat_uv); |
| 3319 | if (rc < 0) { |
| 3320 | pr_err("simultaneous vbat ibat failed err = %d\n", rc); |
| 3321 | return 0; |
| 3322 | } |
| 3323 | |
| 3324 | very_low_voltage_check(the_chip, ibat_ua, vbat_uv); |
| 3325 | return 0; |
| 3326 | } |
| 3327 | |
| 3328 | static const struct dev_pm_ops pm8921_bms_pm_ops = { |
| 3329 | .resume = pm8921_bms_resume, |
| 3330 | }; |
| 3331 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3332 | static struct platform_driver pm8921_bms_driver = { |
| 3333 | .probe = pm8921_bms_probe, |
| 3334 | .remove = __devexit_p(pm8921_bms_remove), |
| 3335 | .driver = { |
| 3336 | .name = PM8921_BMS_DEV_NAME, |
| 3337 | .owner = THIS_MODULE, |
Abhijeet Dharmapurikar | d1c761d | 2012-08-14 19:15:53 -0700 | [diff] [blame^] | 3338 | .pm = &pm8921_bms_pm_ops, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 3339 | }, |
| 3340 | }; |
| 3341 | |
| 3342 | static int __init pm8921_bms_init(void) |
| 3343 | { |
| 3344 | return platform_driver_register(&pm8921_bms_driver); |
| 3345 | } |
| 3346 | |
| 3347 | static void __exit pm8921_bms_exit(void) |
| 3348 | { |
| 3349 | platform_driver_unregister(&pm8921_bms_driver); |
| 3350 | } |
| 3351 | |
| 3352 | late_initcall(pm8921_bms_init); |
| 3353 | module_exit(pm8921_bms_exit); |
| 3354 | |
| 3355 | MODULE_LICENSE("GPL v2"); |
| 3356 | MODULE_DESCRIPTION("PMIC8921 bms driver"); |
| 3357 | MODULE_VERSION("1.0"); |
| 3358 | MODULE_ALIAS("platform:" PM8921_BMS_DEV_NAME); |