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> |
| 19 | #include <linux/mfd/pm8xxx/pm8921-bms.h> |
| 20 | #include <linux/mfd/pm8xxx/core.h> |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 21 | #include <linux/mfd/pm8xxx/pm8xxx-adc.h> |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 22 | #include <linux/mfd/pm8xxx/ccadc.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/bitops.h> |
| 25 | #include <linux/debugfs.h> |
| 26 | #include <linux/slab.h> |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 27 | #include <linux/delay.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 28 | |
| 29 | #define BMS_CONTROL 0x224 |
| 30 | #define BMS_OUTPUT0 0x230 |
| 31 | #define BMS_OUTPUT1 0x231 |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 32 | #define BMS_TOLERANCES 0x232 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 33 | #define BMS_TEST1 0x237 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 34 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 35 | #define ADC_ARB_SECP_CNTRL 0x190 |
| 36 | #define ADC_ARB_SECP_AMUX_CNTRL 0x191 |
| 37 | #define ADC_ARB_SECP_ANA_PARAM 0x192 |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 38 | #define ADC_ARB_SECP_DIG_PARAM 0x193 |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 39 | #define ADC_ARB_SECP_RSV 0x194 |
| 40 | #define ADC_ARB_SECP_DATA1 0x195 |
| 41 | #define ADC_ARB_SECP_DATA0 0x196 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 42 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 43 | #define ADC_ARB_BMS_CNTRL 0x18D |
| 44 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 45 | enum pmic_bms_interrupts { |
| 46 | PM8921_BMS_SBI_WRITE_OK, |
| 47 | PM8921_BMS_CC_THR, |
| 48 | PM8921_BMS_VSENSE_THR, |
| 49 | PM8921_BMS_VSENSE_FOR_R, |
| 50 | PM8921_BMS_OCV_FOR_R, |
| 51 | PM8921_BMS_GOOD_OCV, |
| 52 | PM8921_BMS_VSENSE_AVG, |
| 53 | PM_BMS_MAX_INTS, |
| 54 | }; |
| 55 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 56 | struct pm8921_soc_params { |
| 57 | uint16_t ocv_for_rbatt_raw; |
| 58 | uint16_t vsense_for_rbatt_raw; |
| 59 | uint16_t vbatt_for_rbatt_raw; |
| 60 | uint16_t last_good_ocv_raw; |
| 61 | int cc; |
| 62 | |
| 63 | int ocv_for_rbatt_uv; |
| 64 | int vsense_for_rbatt_uv; |
| 65 | int vbatt_for_rbatt_uv; |
| 66 | int last_good_ocv_uv; |
| 67 | }; |
| 68 | |
| 69 | /** |
| 70 | * struct pm8921_bms_chip - |
| 71 | * @bms_output_lock: lock to prevent concurrent bms reads |
| 72 | * @bms_100_lock: lock to prevent concurrent updates to values that force |
| 73 | * 100% charge |
| 74 | * |
| 75 | */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 76 | struct pm8921_bms_chip { |
| 77 | struct device *dev; |
| 78 | struct dentry *dent; |
| 79 | unsigned int r_sense; |
| 80 | unsigned int i_test; |
| 81 | unsigned int v_failure; |
| 82 | unsigned int fcc; |
| 83 | struct single_row_lut *fcc_temp_lut; |
| 84 | struct single_row_lut *fcc_sf_lut; |
| 85 | struct pc_temp_ocv_lut *pc_temp_ocv_lut; |
| 86 | struct pc_sf_lut *pc_sf_lut; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 87 | struct work_struct calib_hkadc_work; |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 88 | struct delayed_work calib_ccadc_work; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 89 | unsigned int calib_delay_ms; |
Abhijeet Dharmapurikar | fa77f1a | 2011-06-27 21:11:51 -0700 | [diff] [blame] | 90 | unsigned int revision; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 91 | unsigned int xoadc_v0625; |
| 92 | unsigned int xoadc_v125; |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 93 | unsigned int batt_temp_channel; |
| 94 | unsigned int vbat_channel; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 95 | unsigned int ref625mv_channel; |
| 96 | unsigned int ref1p25v_channel; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 97 | unsigned int batt_id_channel; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 98 | unsigned int pmic_bms_irq[PM_BMS_MAX_INTS]; |
| 99 | DECLARE_BITMAP(enabled_irqs, PM_BMS_MAX_INTS); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 100 | spinlock_t bms_output_lock; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 101 | spinlock_t bms_100_lock; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 102 | struct single_row_lut *adjusted_fcc_temp_lut; |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 103 | unsigned int charging_began; |
| 104 | unsigned int start_percent; |
| 105 | unsigned int end_percent; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 106 | enum battery_type batt_type; |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 107 | uint16_t ocv_reading_at_100; |
| 108 | int cc_reading_at_100; |
Abhijeet Dharmapurikar | a93ede8 | 2011-11-17 12:20:03 -0800 | [diff] [blame] | 109 | int max_voltage_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 110 | }; |
| 111 | |
| 112 | static struct pm8921_bms_chip *the_chip; |
| 113 | |
| 114 | #define DEFAULT_RBATT_MOHMS 128 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 115 | #define DEFAULT_OCV_MICROVOLTS 3900000 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 116 | #define DEFAULT_CHARGE_CYCLES 0 |
| 117 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 118 | static int last_chargecycles = DEFAULT_CHARGE_CYCLES; |
| 119 | static int last_charge_increase; |
| 120 | module_param(last_chargecycles, int, 0644); |
| 121 | module_param(last_charge_increase, int, 0644); |
| 122 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 123 | static int last_rbatt = -EINVAL; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 124 | static int last_ocv_uv = -EINVAL; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 125 | static int last_soc = -EINVAL; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 126 | static int last_real_fcc_mah = -EINVAL; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 127 | static int last_real_fcc_batt_temp = -EINVAL; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 128 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 129 | static int bms_ops_set(const char *val, const struct kernel_param *kp) |
| 130 | { |
| 131 | if (*(int *)kp->arg == -EINVAL) |
| 132 | return param_set_int(val, kp); |
| 133 | else |
| 134 | return 0; |
| 135 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 136 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 137 | static struct kernel_param_ops bms_param_ops = { |
| 138 | .set = bms_ops_set, |
| 139 | .get = param_get_int, |
| 140 | }; |
| 141 | |
| 142 | module_param_cb(last_rbatt, &bms_param_ops, &last_rbatt, 0644); |
| 143 | module_param_cb(last_ocv_uv, &bms_param_ops, &last_ocv_uv, 0644); |
| 144 | module_param_cb(last_soc, &bms_param_ops, &last_soc, 0644); |
| 145 | |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 146 | /* |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 147 | * bms_fake_battery is set in setups where a battery emulator is used instead |
| 148 | * of a real battery. This makes the bms driver report a different/fake value |
| 149 | * regardless of the calculated state of charge. |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 150 | */ |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 151 | static int bms_fake_battery = -EINVAL; |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 152 | module_param(bms_fake_battery, int, 0644); |
| 153 | |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 154 | /* bms_start_XXX and bms_end_XXX are read only */ |
| 155 | static int bms_start_percent; |
| 156 | static int bms_start_ocv_uv; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 157 | static int bms_start_cc_uah; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 158 | static int bms_end_percent; |
| 159 | static int bms_end_ocv_uv; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 160 | static int bms_end_cc_uah; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 161 | |
| 162 | static int bms_ro_ops_set(const char *val, const struct kernel_param *kp) |
| 163 | { |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | |
| 167 | static struct kernel_param_ops bms_ro_param_ops = { |
| 168 | .set = bms_ro_ops_set, |
| 169 | .get = param_get_int, |
| 170 | }; |
| 171 | module_param_cb(bms_start_percent, &bms_ro_param_ops, &bms_start_percent, 0644); |
| 172 | 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] | 173 | 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] | 174 | |
| 175 | module_param_cb(bms_end_percent, &bms_ro_param_ops, &bms_end_percent, 0644); |
| 176 | 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] | 177 | 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] | 178 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 179 | static int interpolate_fcc(struct pm8921_bms_chip *chip, int batt_temp); |
| 180 | static void readjust_fcc_table(void) |
| 181 | { |
| 182 | struct single_row_lut *temp, *old; |
| 183 | int i, fcc, ratio; |
| 184 | |
| 185 | if (!the_chip->fcc_temp_lut) { |
| 186 | pr_err("The static fcc lut table is NULL\n"); |
| 187 | return; |
| 188 | } |
| 189 | |
| 190 | temp = kzalloc(sizeof(struct single_row_lut), GFP_KERNEL); |
| 191 | if (!temp) { |
| 192 | pr_err("Cannot allocate memory for adjusted fcc table\n"); |
| 193 | return; |
| 194 | } |
| 195 | |
| 196 | fcc = interpolate_fcc(the_chip, last_real_fcc_batt_temp); |
| 197 | |
| 198 | temp->cols = the_chip->fcc_temp_lut->cols; |
| 199 | for (i = 0; i < the_chip->fcc_temp_lut->cols; i++) { |
| 200 | temp->x[i] = the_chip->fcc_temp_lut->x[i]; |
| 201 | ratio = div_u64(the_chip->fcc_temp_lut->y[i] * 1000, fcc); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 202 | temp->y[i] = (ratio * last_real_fcc_mah); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 203 | temp->y[i] /= 1000; |
| 204 | pr_debug("temp=%d, staticfcc=%d, adjfcc=%d, ratio=%d\n", |
| 205 | temp->x[i], the_chip->fcc_temp_lut->y[i], |
| 206 | temp->y[i], ratio); |
| 207 | } |
| 208 | |
| 209 | old = the_chip->adjusted_fcc_temp_lut; |
| 210 | the_chip->adjusted_fcc_temp_lut = temp; |
| 211 | kfree(old); |
| 212 | } |
| 213 | |
| 214 | static int bms_last_real_fcc_set(const char *val, |
| 215 | const struct kernel_param *kp) |
| 216 | { |
| 217 | int rc = 0; |
| 218 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 219 | if (last_real_fcc_mah == -EINVAL) |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 220 | rc = param_set_int(val, kp); |
| 221 | if (rc) { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 222 | 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] | 223 | return rc; |
| 224 | } |
| 225 | if (last_real_fcc_batt_temp != -EINVAL) |
| 226 | readjust_fcc_table(); |
| 227 | return rc; |
| 228 | } |
| 229 | static struct kernel_param_ops bms_last_real_fcc_param_ops = { |
| 230 | .set = bms_last_real_fcc_set, |
| 231 | .get = param_get_int, |
| 232 | }; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 233 | module_param_cb(last_real_fcc_mah, &bms_last_real_fcc_param_ops, |
| 234 | &last_real_fcc_mah, 0644); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 235 | |
| 236 | static int bms_last_real_fcc_batt_temp_set(const char *val, |
| 237 | const struct kernel_param *kp) |
| 238 | { |
| 239 | int rc = 0; |
| 240 | |
| 241 | if (last_real_fcc_batt_temp == -EINVAL) |
| 242 | rc = param_set_int(val, kp); |
| 243 | if (rc) { |
| 244 | pr_err("Failed to set last_real_fcc_batt_temp rc=%d\n", rc); |
| 245 | return rc; |
| 246 | } |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 247 | if (last_real_fcc_mah != -EINVAL) |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 248 | readjust_fcc_table(); |
| 249 | return rc; |
| 250 | } |
| 251 | |
| 252 | static struct kernel_param_ops bms_last_real_fcc_batt_temp_param_ops = { |
| 253 | .set = bms_last_real_fcc_batt_temp_set, |
| 254 | .get = param_get_int, |
| 255 | }; |
| 256 | module_param_cb(last_real_fcc_batt_temp, &bms_last_real_fcc_batt_temp_param_ops, |
| 257 | &last_real_fcc_batt_temp, 0644); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 258 | |
| 259 | static int pm_bms_get_rt_status(struct pm8921_bms_chip *chip, int irq_id) |
| 260 | { |
| 261 | return pm8xxx_read_irq_stat(chip->dev->parent, |
| 262 | chip->pmic_bms_irq[irq_id]); |
| 263 | } |
| 264 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 265 | static void pm8921_bms_enable_irq(struct pm8921_bms_chip *chip, int interrupt) |
| 266 | { |
| 267 | if (!__test_and_set_bit(interrupt, chip->enabled_irqs)) { |
| 268 | dev_dbg(chip->dev, "%s %d\n", __func__, |
| 269 | chip->pmic_bms_irq[interrupt]); |
| 270 | enable_irq(chip->pmic_bms_irq[interrupt]); |
| 271 | } |
| 272 | } |
| 273 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 274 | static void pm8921_bms_disable_irq(struct pm8921_bms_chip *chip, int interrupt) |
| 275 | { |
| 276 | if (__test_and_clear_bit(interrupt, chip->enabled_irqs)) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 277 | pr_debug("%d\n", chip->pmic_bms_irq[interrupt]); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 278 | disable_irq_nosync(chip->pmic_bms_irq[interrupt]); |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | static int pm_bms_masked_write(struct pm8921_bms_chip *chip, u16 addr, |
| 283 | u8 mask, u8 val) |
| 284 | { |
| 285 | int rc; |
| 286 | u8 reg; |
| 287 | |
| 288 | rc = pm8xxx_readb(chip->dev->parent, addr, ®); |
| 289 | if (rc) { |
| 290 | pr_err("read failed addr = %03X, rc = %d\n", addr, rc); |
| 291 | return rc; |
| 292 | } |
| 293 | reg &= ~mask; |
| 294 | reg |= val & mask; |
| 295 | rc = pm8xxx_writeb(chip->dev->parent, addr, reg); |
| 296 | if (rc) { |
| 297 | pr_err("write failed addr = %03X, rc = %d\n", addr, rc); |
| 298 | return rc; |
| 299 | } |
| 300 | return 0; |
| 301 | } |
| 302 | |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 303 | #define HOLD_OREG_DATA BIT(1) |
| 304 | static int pm_bms_lock_output_data(struct pm8921_bms_chip *chip) |
| 305 | { |
| 306 | int rc; |
| 307 | |
| 308 | rc = pm_bms_masked_write(chip, BMS_CONTROL, HOLD_OREG_DATA, |
| 309 | HOLD_OREG_DATA); |
| 310 | if (rc) { |
| 311 | pr_err("couldnt lock bms output rc = %d\n", rc); |
| 312 | return rc; |
| 313 | } |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static int pm_bms_unlock_output_data(struct pm8921_bms_chip *chip) |
| 318 | { |
| 319 | int rc; |
| 320 | |
| 321 | rc = pm_bms_masked_write(chip, BMS_CONTROL, HOLD_OREG_DATA, 0); |
| 322 | if (rc) { |
| 323 | pr_err("fail to unlock BMS_CONTROL rc = %d\n", rc); |
| 324 | return rc; |
| 325 | } |
| 326 | return 0; |
| 327 | } |
| 328 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 329 | #define SELECT_OUTPUT_DATA 0x1C |
| 330 | #define SELECT_OUTPUT_TYPE_SHIFT 2 |
| 331 | #define OCV_FOR_RBATT 0x0 |
| 332 | #define VSENSE_FOR_RBATT 0x1 |
| 333 | #define VBATT_FOR_RBATT 0x2 |
| 334 | #define CC_MSB 0x3 |
| 335 | #define CC_LSB 0x4 |
| 336 | #define LAST_GOOD_OCV_VALUE 0x5 |
| 337 | #define VSENSE_AVG 0x6 |
| 338 | #define VBATT_AVG 0x7 |
| 339 | |
| 340 | static int pm_bms_read_output_data(struct pm8921_bms_chip *chip, int type, |
| 341 | int16_t *result) |
| 342 | { |
| 343 | int rc; |
| 344 | u8 reg; |
| 345 | |
| 346 | if (!result) { |
| 347 | pr_err("result pointer null\n"); |
| 348 | return -EINVAL; |
| 349 | } |
| 350 | *result = 0; |
| 351 | if (type < OCV_FOR_RBATT || type > VBATT_AVG) { |
| 352 | pr_err("invalid type %d asked to read\n", type); |
| 353 | return -EINVAL; |
| 354 | } |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 355 | |
| 356 | /* make sure the bms registers are locked */ |
| 357 | rc = pm8xxx_readb(chip->dev->parent, BMS_CONTROL, ®); |
| 358 | if (rc) { |
| 359 | pr_err("fail to read BMS_OUTPUT0 for type %d rc = %d\n", |
| 360 | type, rc); |
| 361 | return rc; |
| 362 | } |
| 363 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 364 | rc = pm_bms_masked_write(chip, BMS_CONTROL, SELECT_OUTPUT_DATA, |
| 365 | type << SELECT_OUTPUT_TYPE_SHIFT); |
| 366 | if (rc) { |
| 367 | pr_err("fail to select %d type in BMS_CONTROL rc = %d\n", |
| 368 | type, rc); |
| 369 | return rc; |
| 370 | } |
| 371 | |
| 372 | rc = pm8xxx_readb(chip->dev->parent, BMS_OUTPUT0, ®); |
| 373 | if (rc) { |
| 374 | pr_err("fail to read BMS_OUTPUT0 for type %d rc = %d\n", |
| 375 | type, rc); |
| 376 | return rc; |
| 377 | } |
| 378 | *result = reg; |
| 379 | rc = pm8xxx_readb(chip->dev->parent, BMS_OUTPUT1, ®); |
| 380 | if (rc) { |
| 381 | pr_err("fail to read BMS_OUTPUT1 for type %d rc = %d\n", |
| 382 | type, rc); |
| 383 | return rc; |
| 384 | } |
| 385 | *result |= reg << 8; |
| 386 | pr_debug("type %d result %x", type, *result); |
| 387 | return 0; |
| 388 | } |
| 389 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 390 | #define V_PER_BIT_MUL_FACTOR 97656 |
| 391 | #define V_PER_BIT_DIV_FACTOR 1000 |
| 392 | #define XOADC_INTRINSIC_OFFSET 0x6000 |
| 393 | static int xoadc_reading_to_microvolt(unsigned int a) |
Abhijeet Dharmapurikar | d76311f | 2011-07-19 13:35:01 -0700 | [diff] [blame] | 394 | { |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 395 | if (a <= XOADC_INTRINSIC_OFFSET) |
Abhijeet Dharmapurikar | d76311f | 2011-07-19 13:35:01 -0700 | [diff] [blame] | 396 | return 0; |
| 397 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 398 | return (a - XOADC_INTRINSIC_OFFSET) |
| 399 | * V_PER_BIT_MUL_FACTOR / V_PER_BIT_DIV_FACTOR; |
Abhijeet Dharmapurikar | d76311f | 2011-07-19 13:35:01 -0700 | [diff] [blame] | 400 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 401 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 402 | #define XOADC_CALIB_UV 625000 |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 403 | #define VBATT_MUL_FACTOR 3 |
| 404 | static int adjust_xo_vbatt_reading(struct pm8921_bms_chip *chip, |
| 405 | unsigned int uv) |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 406 | { |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 407 | u64 numerator, denominator; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 408 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 409 | if (uv == 0) |
| 410 | return 0; |
| 411 | |
| 412 | numerator = ((u64)uv - chip->xoadc_v0625) * XOADC_CALIB_UV; |
| 413 | denominator = chip->xoadc_v125 - chip->xoadc_v0625; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 414 | if (denominator == 0) |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 415 | return uv * VBATT_MUL_FACTOR; |
| 416 | return (XOADC_CALIB_UV + div_u64(numerator, denominator)) |
| 417 | * VBATT_MUL_FACTOR; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 420 | #define CC_RESOLUTION_N_V1 1085069 |
| 421 | #define CC_RESOLUTION_D_V1 100000 |
| 422 | #define CC_RESOLUTION_N_V2 868056 |
| 423 | #define CC_RESOLUTION_D_V2 10000 |
| 424 | static s64 cc_to_microvolt_v1(s64 cc) |
| 425 | { |
| 426 | return div_s64(cc * CC_RESOLUTION_N_V1, CC_RESOLUTION_D_V1); |
| 427 | } |
| 428 | |
| 429 | static s64 cc_to_microvolt_v2(s64 cc) |
| 430 | { |
| 431 | return div_s64(cc * CC_RESOLUTION_N_V2, CC_RESOLUTION_D_V2); |
| 432 | } |
| 433 | |
| 434 | static s64 cc_to_microvolt(struct pm8921_bms_chip *chip, s64 cc) |
| 435 | { |
| 436 | /* |
| 437 | * resolution (the value of a single bit) was changed after revision 2.0 |
| 438 | * for more accurate readings |
| 439 | */ |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 440 | return (chip->revision < PM8XXX_REVISION_8921_2p0) ? |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 441 | cc_to_microvolt_v1((s64)cc) : |
| 442 | cc_to_microvolt_v2((s64)cc); |
| 443 | } |
| 444 | |
| 445 | #define CC_READING_TICKS 55 |
| 446 | #define SLEEP_CLK_HZ 32768 |
| 447 | #define SECONDS_PER_HOUR 3600 |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 448 | /** |
| 449 | * ccmicrovolt_to_nvh - |
| 450 | * @cc_uv: coulumb counter converted to uV |
| 451 | * |
| 452 | * RETURNS: coulumb counter based charge in nVh |
| 453 | * (nano Volt Hour) |
| 454 | */ |
| 455 | static s64 ccmicrovolt_to_nvh(s64 cc_uv) |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 456 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 457 | return div_s64(cc_uv * CC_READING_TICKS * 1000, |
Abhijeet Dharmapurikar | eed550b | 2011-07-18 22:35:24 -0700 | [diff] [blame] | 458 | SLEEP_CLK_HZ * SECONDS_PER_HOUR); |
| 459 | } |
| 460 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 461 | /* returns the signed value read from the hardware */ |
| 462 | static int read_cc(struct pm8921_bms_chip *chip, int *result) |
| 463 | { |
| 464 | int rc; |
| 465 | uint16_t msw, lsw; |
| 466 | |
| 467 | rc = pm_bms_read_output_data(chip, CC_LSB, &lsw); |
| 468 | if (rc) { |
| 469 | pr_err("fail to read CC_LSB rc = %d\n", rc); |
| 470 | return rc; |
| 471 | } |
| 472 | rc = pm_bms_read_output_data(chip, CC_MSB, &msw); |
| 473 | if (rc) { |
| 474 | pr_err("fail to read CC_MSB rc = %d\n", rc); |
| 475 | return rc; |
| 476 | } |
| 477 | *result = msw << 16 | lsw; |
| 478 | pr_debug("msw = %04x lsw = %04x cc = %d\n", msw, lsw, *result); |
| 479 | return 0; |
| 480 | } |
| 481 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 482 | static int convert_vbatt_raw_to_uv(struct pm8921_bms_chip *chip, |
| 483 | uint16_t reading, int *result) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 484 | { |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 485 | *result = xoadc_reading_to_microvolt(reading); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 486 | pr_debug("raw = %04x vbatt = %u\n", reading, *result); |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 487 | *result = adjust_xo_vbatt_reading(chip, *result); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 488 | pr_debug("after adj vbatt = %u\n", *result); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 489 | return 0; |
| 490 | } |
| 491 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 492 | static int convert_vsense_to_uv(struct pm8921_bms_chip *chip, |
| 493 | int16_t reading, int *result) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 494 | { |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 495 | *result = pm8xxx_ccadc_reading_to_microvolt(chip->revision, reading); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 496 | pr_debug("raw = %04x vsense = %d\n", reading, *result); |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 497 | *result = pm8xxx_cc_adjust_for_gain(*result); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 498 | pr_debug("after adj vsense = %d\n", *result); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 499 | return 0; |
| 500 | } |
| 501 | |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 502 | static int read_vsense_avg(struct pm8921_bms_chip *chip, int *result) |
| 503 | { |
| 504 | int rc; |
| 505 | int16_t reading; |
| 506 | |
| 507 | rc = pm_bms_read_output_data(chip, VSENSE_AVG, &reading); |
| 508 | if (rc) { |
| 509 | pr_err("fail to read VSENSE_AVG rc = %d\n", rc); |
| 510 | return rc; |
| 511 | } |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 512 | |
| 513 | convert_vsense_to_uv(chip, reading, result); |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 514 | return 0; |
| 515 | } |
| 516 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 517 | static int linear_interpolate(int y0, int x0, int y1, int x1, int x) |
| 518 | { |
| 519 | if (y0 == y1 || x == x0) |
| 520 | return y0; |
| 521 | if (x1 == x0 || x == x1) |
| 522 | return y1; |
| 523 | |
| 524 | return y0 + ((y1 - y0) * (x - x0) / (x1 - x0)); |
| 525 | } |
| 526 | |
| 527 | static int interpolate_single_lut(struct single_row_lut *lut, int x) |
| 528 | { |
| 529 | int i, result; |
| 530 | |
| 531 | if (x < lut->x[0]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 532 | pr_debug("x %d less than known range return y = %d lut = %pS\n", |
| 533 | x, lut->y[0], lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 534 | return lut->y[0]; |
| 535 | } |
| 536 | if (x > lut->x[lut->cols - 1]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 537 | pr_debug("x %d more than known range return y = %d lut = %pS\n", |
| 538 | x, lut->y[lut->cols - 1], lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 539 | return lut->y[lut->cols - 1]; |
| 540 | } |
| 541 | |
| 542 | for (i = 0; i < lut->cols; i++) |
| 543 | if (x <= lut->x[i]) |
| 544 | break; |
| 545 | if (x == lut->x[i]) { |
| 546 | result = lut->y[i]; |
| 547 | } else { |
| 548 | result = linear_interpolate( |
| 549 | lut->y[i - 1], |
| 550 | lut->x[i - 1], |
| 551 | lut->y[i], |
| 552 | lut->x[i], |
| 553 | x); |
| 554 | } |
| 555 | return result; |
| 556 | } |
| 557 | |
| 558 | static int interpolate_fcc(struct pm8921_bms_chip *chip, int batt_temp) |
| 559 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 560 | /* batt_temp is in tenths of degC - convert it to degC for lookups */ |
| 561 | batt_temp = batt_temp/10; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 562 | return interpolate_single_lut(chip->fcc_temp_lut, batt_temp); |
| 563 | } |
| 564 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 565 | static int interpolate_fcc_adjusted(struct pm8921_bms_chip *chip, int batt_temp) |
| 566 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 567 | /* batt_temp is in tenths of degC - convert it to degC for lookups */ |
| 568 | batt_temp = batt_temp/10; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 569 | return interpolate_single_lut(chip->adjusted_fcc_temp_lut, batt_temp); |
| 570 | } |
| 571 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 572 | static int interpolate_scalingfactor_fcc(struct pm8921_bms_chip *chip, |
| 573 | int cycles) |
| 574 | { |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 575 | /* |
| 576 | * sf table could be null when no battery aging data is available, in |
| 577 | * that case return 100% |
| 578 | */ |
| 579 | if (chip->fcc_sf_lut) |
| 580 | return interpolate_single_lut(chip->fcc_sf_lut, cycles); |
| 581 | else |
| 582 | return 100; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static int interpolate_scalingfactor_pc(struct pm8921_bms_chip *chip, |
| 586 | int cycles, int pc) |
| 587 | { |
Abhijeet Dharmapurikar | 4a4456e | 2011-09-27 15:10:38 -0700 | [diff] [blame] | 588 | int i, scalefactorrow1, scalefactorrow2, scalefactor; |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 589 | int rows, cols; |
Abhijeet Dharmapurikar | 4a4456e | 2011-09-27 15:10:38 -0700 | [diff] [blame] | 590 | int row1 = 0; |
| 591 | int row2 = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 592 | |
Abhijeet Dharmapurikar | 205bbc0 | 2011-11-04 14:47:36 -0700 | [diff] [blame] | 593 | /* |
| 594 | * sf table could be null when no battery aging data is available, in |
| 595 | * that case return 100% |
| 596 | */ |
| 597 | if (!chip->pc_sf_lut) |
| 598 | return 100; |
| 599 | |
| 600 | rows = chip->pc_sf_lut->rows; |
| 601 | cols = chip->pc_sf_lut->cols; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 602 | if (pc > chip->pc_sf_lut->percent[0]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 603 | 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] | 604 | row1 = 0; |
| 605 | row2 = 0; |
| 606 | } |
| 607 | if (pc < chip->pc_sf_lut->percent[rows - 1]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 608 | pr_debug("pc %d less than known pc ranges for sf", pc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 609 | row1 = rows - 1; |
| 610 | row2 = rows - 1; |
| 611 | } |
| 612 | for (i = 0; i < rows; i++) { |
| 613 | if (pc == chip->pc_sf_lut->percent[i]) { |
| 614 | row1 = i; |
| 615 | row2 = i; |
| 616 | break; |
| 617 | } |
| 618 | if (pc > chip->pc_sf_lut->percent[i]) { |
| 619 | row1 = i - 1; |
| 620 | row2 = i; |
| 621 | break; |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | if (cycles < chip->pc_sf_lut->cycles[0]) |
| 626 | cycles = chip->pc_sf_lut->cycles[0]; |
| 627 | if (cycles > chip->pc_sf_lut->cycles[cols - 1]) |
| 628 | cycles = chip->pc_sf_lut->cycles[cols - 1]; |
| 629 | |
| 630 | for (i = 0; i < cols; i++) |
| 631 | if (cycles <= chip->pc_sf_lut->cycles[i]) |
| 632 | break; |
| 633 | if (cycles == chip->pc_sf_lut->cycles[i]) { |
| 634 | scalefactor = linear_interpolate( |
| 635 | chip->pc_sf_lut->sf[row1][i], |
| 636 | chip->pc_sf_lut->percent[row1], |
| 637 | chip->pc_sf_lut->sf[row2][i], |
| 638 | chip->pc_sf_lut->percent[row2], |
| 639 | pc); |
| 640 | return scalefactor; |
| 641 | } |
| 642 | |
| 643 | scalefactorrow1 = linear_interpolate( |
| 644 | chip->pc_sf_lut->sf[row1][i - 1], |
| 645 | chip->pc_sf_lut->cycles[i - 1], |
| 646 | chip->pc_sf_lut->sf[row1][i], |
| 647 | chip->pc_sf_lut->cycles[i], |
| 648 | cycles); |
| 649 | |
| 650 | scalefactorrow2 = linear_interpolate( |
| 651 | chip->pc_sf_lut->sf[row2][i - 1], |
| 652 | chip->pc_sf_lut->cycles[i - 1], |
| 653 | chip->pc_sf_lut->sf[row2][i], |
| 654 | chip->pc_sf_lut->cycles[i], |
| 655 | cycles); |
| 656 | |
| 657 | scalefactor = linear_interpolate( |
| 658 | scalefactorrow1, |
| 659 | chip->pc_sf_lut->percent[row1], |
| 660 | scalefactorrow2, |
| 661 | chip->pc_sf_lut->percent[row2], |
| 662 | pc); |
| 663 | |
| 664 | return scalefactor; |
| 665 | } |
| 666 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 667 | static int is_between(int left, int right, int value) |
| 668 | { |
| 669 | if (left >= right && left >= value && value >= right) |
| 670 | return 1; |
| 671 | if (left <= right && left <= value && value <= right) |
| 672 | return 1; |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 677 | static int interpolate_pc(struct pm8921_bms_chip *chip, |
| 678 | int batt_temp, int ocv) |
| 679 | { |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 680 | int i, j, pcj, pcj_minus_one, pc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 681 | int rows = chip->pc_temp_ocv_lut->rows; |
| 682 | int cols = chip->pc_temp_ocv_lut->cols; |
| 683 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 684 | /* batt_temp is in tenths of degC - convert it to degC for lookups */ |
| 685 | batt_temp = batt_temp/10; |
| 686 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 687 | if (batt_temp < chip->pc_temp_ocv_lut->temp[0]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 688 | pr_debug("batt_temp %d < known temp range for pc\n", batt_temp); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 689 | batt_temp = chip->pc_temp_ocv_lut->temp[0]; |
| 690 | } |
| 691 | if (batt_temp > chip->pc_temp_ocv_lut->temp[cols - 1]) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 692 | pr_debug("batt_temp %d > known temp range for pc\n", batt_temp); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 693 | batt_temp = chip->pc_temp_ocv_lut->temp[cols - 1]; |
| 694 | } |
| 695 | |
| 696 | for (j = 0; j < cols; j++) |
| 697 | if (batt_temp <= chip->pc_temp_ocv_lut->temp[j]) |
| 698 | break; |
| 699 | if (batt_temp == chip->pc_temp_ocv_lut->temp[j]) { |
| 700 | /* found an exact match for temp in the table */ |
| 701 | if (ocv >= chip->pc_temp_ocv_lut->ocv[0][j]) |
| 702 | return chip->pc_temp_ocv_lut->percent[0]; |
| 703 | if (ocv <= chip->pc_temp_ocv_lut->ocv[rows - 1][j]) |
| 704 | return chip->pc_temp_ocv_lut->percent[rows - 1]; |
| 705 | for (i = 0; i < rows; i++) { |
| 706 | if (ocv >= chip->pc_temp_ocv_lut->ocv[i][j]) { |
| 707 | if (ocv == chip->pc_temp_ocv_lut->ocv[i][j]) |
| 708 | return |
| 709 | chip->pc_temp_ocv_lut->percent[i]; |
| 710 | pc = linear_interpolate( |
| 711 | chip->pc_temp_ocv_lut->percent[i], |
| 712 | chip->pc_temp_ocv_lut->ocv[i][j], |
| 713 | chip->pc_temp_ocv_lut->percent[i - 1], |
| 714 | chip->pc_temp_ocv_lut->ocv[i - 1][j], |
| 715 | ocv); |
| 716 | return pc; |
| 717 | } |
| 718 | } |
| 719 | } |
| 720 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 721 | /* |
| 722 | * batt_temp is within temperature for |
| 723 | * column j-1 and j |
| 724 | */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 725 | if (ocv >= chip->pc_temp_ocv_lut->ocv[0][j]) |
| 726 | return chip->pc_temp_ocv_lut->percent[0]; |
| 727 | if (ocv <= chip->pc_temp_ocv_lut->ocv[rows - 1][j - 1]) |
| 728 | return chip->pc_temp_ocv_lut->percent[rows - 1]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 729 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 730 | pcj_minus_one = 0; |
| 731 | pcj = 0; |
| 732 | for (i = 0; i < rows-1; i++) { |
| 733 | if (pcj == 0 |
| 734 | && is_between(chip->pc_temp_ocv_lut->ocv[i][j], |
| 735 | chip->pc_temp_ocv_lut->ocv[i+1][j], ocv)) { |
| 736 | pcj = linear_interpolate( |
| 737 | chip->pc_temp_ocv_lut->percent[i], |
| 738 | chip->pc_temp_ocv_lut->ocv[i][j], |
| 739 | chip->pc_temp_ocv_lut->percent[i + 1], |
| 740 | chip->pc_temp_ocv_lut->ocv[i+1][j], |
| 741 | ocv); |
| 742 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 743 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 744 | if (pcj_minus_one == 0 |
| 745 | && is_between(chip->pc_temp_ocv_lut->ocv[i][j-1], |
| 746 | chip->pc_temp_ocv_lut->ocv[i+1][j-1], ocv)) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 747 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 748 | pcj_minus_one = linear_interpolate( |
| 749 | chip->pc_temp_ocv_lut->percent[i], |
| 750 | chip->pc_temp_ocv_lut->ocv[i][j-1], |
| 751 | chip->pc_temp_ocv_lut->percent[i + 1], |
| 752 | chip->pc_temp_ocv_lut->ocv[i+1][j-1], |
| 753 | ocv); |
| 754 | } |
| 755 | |
| 756 | if (pcj && pcj_minus_one) { |
| 757 | pc = linear_interpolate( |
| 758 | pcj_minus_one, |
| 759 | chip->pc_temp_ocv_lut->temp[j-1], |
| 760 | pcj, |
| 761 | chip->pc_temp_ocv_lut->temp[j], |
| 762 | batt_temp); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 763 | return pc; |
| 764 | } |
| 765 | } |
| 766 | |
Abhijeet Dharmapurikar | 78d812f | 2011-07-21 19:57:21 -0700 | [diff] [blame] | 767 | if (pcj) |
| 768 | return pcj; |
| 769 | |
| 770 | if (pcj_minus_one) |
| 771 | return pcj_minus_one; |
| 772 | |
| 773 | pr_debug("%d ocv wasn't found for temp %d in the LUT returning 100%%", |
| 774 | ocv, batt_temp); |
| 775 | return 100; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 776 | } |
| 777 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 778 | static int read_soc_params_raw(struct pm8921_bms_chip *chip, |
| 779 | struct pm8921_soc_params *raw) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 780 | { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 781 | unsigned long flags; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 782 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 783 | spin_lock_irqsave(&chip->bms_output_lock, flags); |
| 784 | pm_bms_lock_output_data(chip); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 785 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 786 | pm_bms_read_output_data(chip, |
| 787 | OCV_FOR_RBATT, &raw->ocv_for_rbatt_raw); |
| 788 | pm_bms_read_output_data(chip, |
| 789 | VBATT_FOR_RBATT, &raw->vbatt_for_rbatt_raw); |
| 790 | pm_bms_read_output_data(chip, |
| 791 | VSENSE_FOR_RBATT, &raw->vsense_for_rbatt_raw); |
| 792 | pm_bms_read_output_data(chip, |
| 793 | LAST_GOOD_OCV_VALUE, &raw->last_good_ocv_raw); |
| 794 | read_cc(chip, &raw->cc); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 795 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 796 | pm_bms_unlock_output_data(chip); |
| 797 | spin_unlock_irqrestore(&chip->bms_output_lock, flags); |
| 798 | |
| 799 | convert_vbatt_raw_to_uv(chip, |
| 800 | raw->vbatt_for_rbatt_raw, &raw->vbatt_for_rbatt_uv); |
| 801 | convert_vbatt_raw_to_uv(chip, |
| 802 | raw->ocv_for_rbatt_raw, &raw->ocv_for_rbatt_uv); |
| 803 | convert_vbatt_raw_to_uv(chip, |
| 804 | raw->last_good_ocv_raw, &raw->last_good_ocv_uv); |
| 805 | convert_vsense_to_uv(chip, |
| 806 | raw->vsense_for_rbatt_raw, &raw->vsense_for_rbatt_uv); |
| 807 | |
| 808 | if (raw->last_good_ocv_uv) |
| 809 | last_ocv_uv = raw->last_good_ocv_uv; |
| 810 | |
Abhijeet Dharmapurikar | 1b8e829 | 2012-01-17 11:01:44 -0800 | [diff] [blame^] | 811 | pr_debug("0p625 = %duV\n", chip->xoadc_v0625); |
| 812 | pr_debug("1p25 = %duV\n", chip->xoadc_v125); |
| 813 | |
| 814 | pr_debug("vbatt_for_rbatt_raw = 0x%x, vbatt_for_rbatt= %duV\n", |
| 815 | raw->vbatt_for_rbatt_raw, raw->vbatt_for_rbatt_uv); |
| 816 | pr_debug("ocv_for_rbatt_raw = 0x%x, ocv_for_rbatt= %duV\n", |
| 817 | raw->ocv_for_rbatt_raw, raw->ocv_for_rbatt_uv); |
| 818 | pr_debug("vsense_for_rbatt_raw = 0x%x, vsense_for_rbatt= %duV\n", |
| 819 | raw->vsense_for_rbatt_raw, raw->vsense_for_rbatt_uv); |
| 820 | pr_debug("last_good_ocv_raw= 0x%x, last_good_ocv_uv= %duV\n", |
| 821 | raw->last_good_ocv_raw, raw->last_good_ocv_uv); |
| 822 | pr_debug("cc_raw= 0x%x\n", raw->cc); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 823 | return 0; |
| 824 | } |
| 825 | |
| 826 | static int calculate_rbatt(struct pm8921_bms_chip *chip, |
| 827 | struct pm8921_soc_params *raw) |
| 828 | { |
| 829 | unsigned int r_batt; |
| 830 | |
| 831 | if (raw->ocv_for_rbatt_uv == 0 |
| 832 | || raw->ocv_for_rbatt_uv == raw->vbatt_for_rbatt_uv |
| 833 | || raw->vsense_for_rbatt_raw == 0) { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 834 | pr_debug("rbatt readings unavailable ocv = %d, vbatt = %d," |
| 835 | "vsen = %d\n", |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 836 | raw->ocv_for_rbatt_uv, |
| 837 | raw->vbatt_for_rbatt_uv, |
| 838 | raw->vsense_for_rbatt_raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 839 | return -EINVAL; |
| 840 | } |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 841 | r_batt = ((raw->ocv_for_rbatt_uv - raw->vbatt_for_rbatt_uv) |
| 842 | * chip->r_sense) / raw->vsense_for_rbatt_uv; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 843 | last_rbatt = r_batt; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 844 | pr_debug("r_batt = %umilliOhms", r_batt); |
| 845 | return r_batt; |
| 846 | } |
| 847 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 848 | 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] | 849 | int chargecycles) |
| 850 | { |
| 851 | int initfcc, result, scalefactor = 0; |
| 852 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 853 | if (chip->adjusted_fcc_temp_lut == NULL) { |
| 854 | initfcc = interpolate_fcc(chip, batt_temp); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 855 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 856 | scalefactor = interpolate_scalingfactor_fcc(chip, chargecycles); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 857 | |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 858 | /* Multiply the initial FCC value by the scale factor. */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 859 | result = (initfcc * scalefactor * 1000) / 100; |
| 860 | pr_debug("fcc = %d uAh\n", result); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 861 | return result; |
| 862 | } else { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 863 | return 1000 * interpolate_fcc_adjusted(chip, batt_temp); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 864 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 865 | } |
| 866 | |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 867 | static int get_battery_uvolts(struct pm8921_bms_chip *chip, int *uvolts) |
| 868 | { |
| 869 | int rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 870 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 871 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 872 | rc = pm8xxx_adc_read(chip->vbat_channel, &result); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 873 | if (rc) { |
| 874 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 875 | chip->vbat_channel, rc); |
| 876 | return rc; |
| 877 | } |
| 878 | pr_debug("mvolts phy = %lld meas = 0x%llx", result.physical, |
| 879 | result.measurement); |
| 880 | *uvolts = (int)result.physical; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 881 | return 0; |
| 882 | } |
| 883 | |
| 884 | static int adc_based_ocv(struct pm8921_bms_chip *chip, int *ocv) |
| 885 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 886 | int vbatt, rbatt, ibatt_ua, rc; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 887 | struct pm8921_soc_params raw; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 888 | |
| 889 | rc = get_battery_uvolts(chip, &vbatt); |
| 890 | if (rc) { |
| 891 | pr_err("failed to read vbatt from adc rc = %d\n", rc); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 892 | return rc; |
| 893 | } |
| 894 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 895 | rc = pm8921_bms_get_battery_current(&ibatt_ua); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 896 | if (rc) { |
| 897 | pr_err("failed to read batt current rc = %d\n", rc); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 898 | return rc; |
| 899 | } |
| 900 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 901 | read_soc_params_raw(chip, &raw); |
| 902 | |
| 903 | rbatt = calculate_rbatt(the_chip, &raw); |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 904 | if (rbatt < 0) |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 905 | rbatt = (last_rbatt < 0) ? DEFAULT_RBATT_MOHMS : last_rbatt; |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 906 | *ocv = vbatt + (ibatt_ua * rbatt)/1000; |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 907 | return 0; |
| 908 | } |
| 909 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 910 | static int calculate_pc(struct pm8921_bms_chip *chip, int ocv_uv, int batt_temp, |
| 911 | int chargecycles) |
| 912 | { |
| 913 | int pc, scalefactor; |
| 914 | |
| 915 | pc = interpolate_pc(chip, batt_temp, ocv_uv / 1000); |
| 916 | pr_debug("pc = %u for ocv = %dmicroVolts batt_temp = %d\n", |
| 917 | pc, ocv_uv, batt_temp); |
| 918 | |
| 919 | scalefactor = interpolate_scalingfactor_pc(chip, chargecycles, pc); |
| 920 | pr_debug("scalefactor = %u batt_temp = %d\n", scalefactor, batt_temp); |
| 921 | |
| 922 | /* Multiply the initial FCC value by the scale factor. */ |
| 923 | pc = (pc * scalefactor) / 100; |
| 924 | return pc; |
| 925 | } |
| 926 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 927 | /** |
| 928 | * calculate_cc_uah - |
| 929 | * @chip: the bms chip pointer |
| 930 | * @cc: the cc reading from bms h/w |
| 931 | * @val: return value |
| 932 | * @coulumb_counter: adjusted coulumb counter for 100% |
| 933 | * |
| 934 | * RETURNS: in val pointer coulumb counter based charger in uAh |
| 935 | * (micro Amp hour) |
| 936 | */ |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 937 | 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] | 938 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 939 | int64_t cc_voltage_uv, cc_nvh, cc_uah; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 940 | |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 941 | cc_voltage_uv = cc; |
| 942 | cc_voltage_uv -= chip->cc_reading_at_100; |
| 943 | pr_debug("cc = %d. after subtracting %d cc = %lld\n", |
| 944 | cc, chip->cc_reading_at_100, |
| 945 | cc_voltage_uv); |
Abhijeet Dharmapurikar | fa77f1a | 2011-06-27 21:11:51 -0700 | [diff] [blame] | 946 | cc_voltage_uv = cc_to_microvolt(chip, cc_voltage_uv); |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 947 | cc_voltage_uv = pm8xxx_cc_adjust_for_gain(cc_voltage_uv); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 948 | pr_debug("cc_voltage_uv = %lld microvolts\n", cc_voltage_uv); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 949 | cc_nvh = ccmicrovolt_to_nvh(cc_voltage_uv); |
| 950 | pr_debug("cc_nvh = %lld nano_volt_hour\n", cc_nvh); |
| 951 | cc_uah = div_s64(cc_nvh, chip->r_sense); |
| 952 | *val = cc_uah; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 953 | } |
| 954 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 955 | static int calculate_unusable_charge_uah(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 956 | struct pm8921_soc_params *raw, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 957 | int fcc_uah, int batt_temp, int chargecycles) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 958 | { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 959 | int rbatt, voltage_unusable_uv, pc_unusable; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 960 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 961 | rbatt = calculate_rbatt(chip, raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 962 | if (rbatt < 0) { |
| 963 | rbatt = (last_rbatt < 0) ? DEFAULT_RBATT_MOHMS : last_rbatt; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 964 | pr_debug("rbatt unavailable assuming %d\n", rbatt); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 965 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 966 | |
| 967 | /* calculate unusable charge */ |
| 968 | voltage_unusable_uv = (rbatt * chip->i_test) |
| 969 | + (chip->v_failure * 1000); |
| 970 | pc_unusable = calculate_pc(chip, voltage_unusable_uv, |
| 971 | batt_temp, chargecycles); |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 972 | pr_debug("rbatt = %umilliOhms unusable_v =%d unusable_pc = %d\n", |
| 973 | rbatt, voltage_unusable_uv, pc_unusable); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 974 | return (fcc_uah * pc_unusable) / 100; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 975 | } |
Abhijeet Dharmapurikar | 52aa968 | 2011-07-20 14:05:47 -0700 | [diff] [blame] | 976 | |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 977 | /* calculate remainging charge at the time of ocv */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 978 | static int calculate_remaining_charge_uah(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 979 | struct pm8921_soc_params *raw, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 980 | int fcc_uah, int batt_temp, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 981 | int chargecycles) |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 982 | { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 983 | int ocv, pc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 984 | |
| 985 | /* calculate remainging charge */ |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 986 | ocv = 0; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 987 | if (chip->ocv_reading_at_100 != raw->last_good_ocv_raw) { |
| 988 | chip->ocv_reading_at_100 = 0; |
| 989 | chip->cc_reading_at_100 = 0; |
| 990 | ocv = raw->last_good_ocv_uv; |
| 991 | } else { |
| 992 | /* |
| 993 | * force 100% ocv by selecting the highest voltage the |
| 994 | * battery could every reach |
| 995 | */ |
| 996 | ocv = chip->max_voltage_uv; |
| 997 | } |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 998 | |
| 999 | if (ocv == 0) { |
| 1000 | ocv = last_ocv_uv; |
| 1001 | pr_debug("ocv not available using last_ocv_uv=%d\n", ocv); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1002 | } |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1003 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1004 | pc = calculate_pc(chip, ocv, batt_temp, chargecycles); |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1005 | pr_debug("ocv = %d pc = %d\n", ocv, pc); |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1006 | return (fcc_uah * pc) / 100; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1009 | static void calculate_soc_params(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1010 | struct pm8921_soc_params *raw, |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1011 | int batt_temp, int chargecycles, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1012 | int *fcc_uah, |
| 1013 | int *unusable_charge_uah, |
| 1014 | int *remaining_charge_uah, |
| 1015 | int *cc_uah) |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1016 | { |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1017 | unsigned long flags; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1018 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1019 | *fcc_uah = calculate_fcc_uah(chip, batt_temp, chargecycles); |
| 1020 | pr_debug("FCC = %uuAh batt_temp = %d, cycles = %d\n", |
| 1021 | *fcc_uah, batt_temp, chargecycles); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1022 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1023 | *unusable_charge_uah = calculate_unusable_charge_uah(chip, raw, |
| 1024 | *fcc_uah, batt_temp, chargecycles); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1025 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1026 | pr_debug("UUC = %uuAh\n", *unusable_charge_uah); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1027 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1028 | spin_lock_irqsave(&chip->bms_100_lock, flags); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1029 | /* calculate remainging charge */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1030 | *remaining_charge_uah = calculate_remaining_charge_uah(chip, raw, |
| 1031 | *fcc_uah, batt_temp, chargecycles); |
| 1032 | pr_debug("RC = %uuAh\n", *remaining_charge_uah); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1033 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1034 | /* calculate cc micro_volt_hour */ |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1035 | calculate_cc_uah(chip, raw->cc, cc_uah); |
| 1036 | pr_debug("cc_uah = %duAh raw->cc = %x cc = %lld after subtracting %d\n", |
| 1037 | *cc_uah, raw->cc, |
| 1038 | (int64_t)raw->cc - chip->cc_reading_at_100, |
| 1039 | chip->cc_reading_at_100); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1040 | spin_unlock_irqrestore(&chip->bms_100_lock, flags); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1041 | } |
| 1042 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1043 | static int calculate_real_fcc_uah(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1044 | struct pm8921_soc_params *raw, |
| 1045 | int batt_temp, int chargecycles, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1046 | int *ret_fcc_uah) |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1047 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1048 | int fcc_uah, unusable_charge_uah; |
| 1049 | int remaining_charge_uah; |
| 1050 | int cc_uah; |
| 1051 | int real_fcc_uah; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1052 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1053 | calculate_soc_params(chip, raw, batt_temp, chargecycles, |
| 1054 | &fcc_uah, |
| 1055 | &unusable_charge_uah, |
| 1056 | &remaining_charge_uah, |
| 1057 | &cc_uah); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1058 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1059 | real_fcc_uah = remaining_charge_uah - cc_uah; |
| 1060 | *ret_fcc_uah = fcc_uah; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1061 | pr_debug("real_fcc = %d, RC = %d CC = %d fcc = %d\n", |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1062 | real_fcc_uah, remaining_charge_uah, cc_uah, fcc_uah); |
| 1063 | return real_fcc_uah; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1064 | } |
| 1065 | /* |
| 1066 | * Remaining Usable Charge = remaining_charge (charge at ocv instance) |
| 1067 | * - coloumb counter charge |
| 1068 | * - unusable charge (due to battery resistance) |
| 1069 | * SOC% = (remaining usable charge/ fcc - usable_charge); |
| 1070 | */ |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1071 | static int calculate_state_of_charge(struct pm8921_bms_chip *chip, |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1072 | struct pm8921_soc_params *raw, |
| 1073 | int batt_temp, int chargecycles) |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1074 | { |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1075 | int remaining_usable_charge_uah, fcc_uah, unusable_charge_uah; |
| 1076 | int remaining_charge_uah, soc; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1077 | int update_userspace = 1; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1078 | int cc_uah; |
Abhijeet Dharmapurikar | 020b37c | 2011-07-20 14:14:51 -0700 | [diff] [blame] | 1079 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1080 | calculate_soc_params(chip, raw, batt_temp, chargecycles, |
| 1081 | &fcc_uah, |
| 1082 | &unusable_charge_uah, |
| 1083 | &remaining_charge_uah, |
| 1084 | &cc_uah); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1085 | |
| 1086 | /* calculate remaining usable charge */ |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1087 | remaining_usable_charge_uah = remaining_charge_uah |
| 1088 | - cc_uah |
| 1089 | - unusable_charge_uah; |
| 1090 | |
| 1091 | pr_debug("RUC = %duAh\n", remaining_usable_charge_uah); |
Abhijeet Dharmapurikar | bbae8831 | 2012-02-14 18:56:42 -0800 | [diff] [blame] | 1092 | if (fcc_uah - unusable_charge_uah <= 0) { |
| 1093 | pr_warn("FCC = %duAh, UUC = %duAh forcing soc = 0\n", |
| 1094 | fcc_uah, unusable_charge_uah); |
| 1095 | soc = 0; |
| 1096 | } else { |
| 1097 | soc = (remaining_usable_charge_uah * 100) |
| 1098 | / (fcc_uah - unusable_charge_uah); |
| 1099 | } |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1100 | |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1101 | if (soc > 100) |
| 1102 | soc = 100; |
| 1103 | pr_debug("SOC = %u%%\n", soc); |
| 1104 | |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 1105 | if (bms_fake_battery != -EINVAL) { |
| 1106 | pr_debug("Returning Fake SOC = %d%%\n", bms_fake_battery); |
| 1107 | return bms_fake_battery; |
| 1108 | } |
| 1109 | |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1110 | if (soc < 0) { |
Abhijeet Dharmapurikar | 21ebadd | 2011-09-28 21:14:16 -0700 | [diff] [blame] | 1111 | pr_err("bad rem_usb_chg = %d rem_chg %d," |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1112 | "cc_uah %d, unusb_chg %d\n", |
| 1113 | remaining_usable_charge_uah, |
| 1114 | remaining_charge_uah, |
| 1115 | cc_uah, unusable_charge_uah); |
| 1116 | |
Abhijeet Dharmapurikar | 21ebadd | 2011-09-28 21:14:16 -0700 | [diff] [blame] | 1117 | pr_err("for bad rem_usb_chg last_ocv_uv = %d" |
Abhijeet Dharmapurikar | af6f9e2 | 2011-10-03 19:19:02 -0700 | [diff] [blame] | 1118 | "chargecycles = %d, batt_temp = %d" |
| 1119 | "fcc = %d soc =%d\n", |
| 1120 | last_ocv_uv, chargecycles, batt_temp, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1121 | fcc_uah, soc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1122 | update_userspace = 0; |
Abhijeet Dharmapurikar | 95971a8 | 2011-12-06 18:23:57 -0800 | [diff] [blame] | 1123 | soc = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1124 | } |
| 1125 | |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1126 | if (last_soc == -EINVAL || soc <= last_soc) { |
| 1127 | last_soc = update_userspace ? soc : last_soc; |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 1128 | return soc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1129 | } |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1130 | |
| 1131 | /* |
| 1132 | * soc > last_soc |
| 1133 | * the device must be charging for reporting a higher soc, if not ignore |
| 1134 | * this soc and continue reporting the last_soc |
| 1135 | */ |
Abhijeet Dharmapurikar | dba91f4 | 2011-12-21 16:56:13 -0800 | [diff] [blame] | 1136 | if (the_chip->start_percent != -EINVAL) { |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1137 | last_soc = soc; |
| 1138 | } else { |
| 1139 | pr_debug("soc = %d reporting last_soc = %d\n", soc, last_soc); |
| 1140 | soc = last_soc; |
| 1141 | } |
| 1142 | |
Abhijeet Dharmapurikar | 986bd8a | 2012-01-05 15:15:15 -0800 | [diff] [blame] | 1143 | return soc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1144 | } |
| 1145 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1146 | static void calib_hkadc(struct pm8921_bms_chip *chip) |
| 1147 | { |
| 1148 | int voltage, rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1149 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1150 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1151 | rc = pm8xxx_adc_read(the_chip->ref1p25v_channel, &result); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1152 | if (rc) { |
| 1153 | pr_err("ADC failed for 1.25volts rc = %d\n", rc); |
| 1154 | return; |
| 1155 | } |
Abhijeet Dharmapurikar | 619cb0c | 2011-12-15 15:28:14 -0800 | [diff] [blame] | 1156 | voltage = xoadc_reading_to_microvolt(result.adc_code); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1157 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 1158 | pr_debug("result 1.25v = 0x%x, voltage = %duV adc_meas = %lld\n", |
| 1159 | result.adc_code, voltage, result.measurement); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1160 | |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1161 | chip->xoadc_v125 = voltage; |
| 1162 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1163 | rc = pm8xxx_adc_read(the_chip->ref625mv_channel, &result); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1164 | if (rc) { |
| 1165 | pr_err("ADC failed for 1.25volts rc = %d\n", rc); |
| 1166 | return; |
| 1167 | } |
Abhijeet Dharmapurikar | 619cb0c | 2011-12-15 15:28:14 -0800 | [diff] [blame] | 1168 | voltage = xoadc_reading_to_microvolt(result.adc_code); |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 1169 | pr_debug("result 0.625V = 0x%x, voltage = %duV adc_meas = %lld\n", |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 1170 | result.adc_code, voltage, result.measurement); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1171 | |
| 1172 | chip->xoadc_v0625 = voltage; |
| 1173 | } |
| 1174 | |
| 1175 | static void calibrate_hkadc_work(struct work_struct *work) |
| 1176 | { |
| 1177 | struct pm8921_bms_chip *chip = container_of(work, |
| 1178 | struct pm8921_bms_chip, calib_hkadc_work); |
| 1179 | |
| 1180 | calib_hkadc(chip); |
| 1181 | } |
| 1182 | |
Abhijeet Dharmapurikar | 1b8e829 | 2012-01-17 11:01:44 -0800 | [diff] [blame^] | 1183 | void pm8921_bms_calibrate_hkadc(void) |
| 1184 | { |
| 1185 | schedule_work(&the_chip->calib_hkadc_work); |
| 1186 | } |
| 1187 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1188 | static void calibrate_ccadc_work(struct work_struct *work) |
| 1189 | { |
| 1190 | struct pm8921_bms_chip *chip = container_of(work, |
| 1191 | struct pm8921_bms_chip, calib_ccadc_work.work); |
| 1192 | |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 1193 | pm8xxx_calib_ccadc(); |
Abhijeet Dharmapurikar | 1b8e829 | 2012-01-17 11:01:44 -0800 | [diff] [blame^] | 1194 | calib_hkadc(chip); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1195 | schedule_delayed_work(&chip->calib_ccadc_work, |
| 1196 | round_jiffies_relative(msecs_to_jiffies |
| 1197 | (chip->calib_delay_ms))); |
| 1198 | } |
| 1199 | |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 1200 | int pm8921_bms_get_vsense_avg(int *result) |
| 1201 | { |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1202 | int rc = -EINVAL; |
| 1203 | unsigned long flags; |
| 1204 | |
| 1205 | if (the_chip) { |
| 1206 | spin_lock_irqsave(&the_chip->bms_output_lock, flags); |
| 1207 | pm_bms_lock_output_data(the_chip); |
| 1208 | rc = read_vsense_avg(the_chip, result); |
| 1209 | pm_bms_unlock_output_data(the_chip); |
| 1210 | spin_unlock_irqrestore(&the_chip->bms_output_lock, flags); |
| 1211 | } |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 1212 | |
| 1213 | pr_err("called before initialization\n"); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1214 | return rc; |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 1215 | } |
| 1216 | EXPORT_SYMBOL(pm8921_bms_get_vsense_avg); |
| 1217 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 1218 | int pm8921_bms_get_battery_current(int *result_ua) |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 1219 | { |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1220 | unsigned long flags; |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1221 | int vsense; |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1222 | |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 1223 | if (!the_chip) { |
| 1224 | pr_err("called before initialization\n"); |
| 1225 | return -EINVAL; |
| 1226 | } |
| 1227 | if (the_chip->r_sense == 0) { |
| 1228 | pr_err("r_sense is zero\n"); |
| 1229 | return -EINVAL; |
| 1230 | } |
| 1231 | |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1232 | spin_lock_irqsave(&the_chip->bms_output_lock, flags); |
| 1233 | pm_bms_lock_output_data(the_chip); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1234 | read_vsense_avg(the_chip, &vsense); |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1235 | pm_bms_unlock_output_data(the_chip); |
| 1236 | spin_unlock_irqrestore(&the_chip->bms_output_lock, flags); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1237 | pr_debug("vsense=%d\n", vsense); |
Abhijeet Dharmapurikar | a7a1c6b | 2011-08-17 10:04:58 -0700 | [diff] [blame] | 1238 | /* cast for signed division */ |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 1239 | *result_ua = vsense * 1000 / (int)the_chip->r_sense; |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1240 | |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 1241 | return 0; |
| 1242 | } |
| 1243 | EXPORT_SYMBOL(pm8921_bms_get_battery_current); |
| 1244 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1245 | int pm8921_bms_get_percent_charge(void) |
| 1246 | { |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 1247 | int batt_temp, rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1248 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1249 | struct pm8921_soc_params raw; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1250 | |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 1251 | if (!the_chip) { |
| 1252 | pr_err("called before initialization\n"); |
| 1253 | return -EINVAL; |
| 1254 | } |
| 1255 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1256 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 1257 | if (rc) { |
| 1258 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 1259 | the_chip->batt_temp_channel, rc); |
| 1260 | return rc; |
| 1261 | } |
| 1262 | pr_debug("batt_temp phy = %lld meas = 0x%llx", result.physical, |
| 1263 | result.measurement); |
| 1264 | batt_temp = (int)result.physical; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1265 | |
| 1266 | read_soc_params_raw(the_chip, &raw); |
| 1267 | |
| 1268 | return calculate_state_of_charge(the_chip, &raw, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1269 | batt_temp, last_chargecycles); |
| 1270 | } |
| 1271 | EXPORT_SYMBOL_GPL(pm8921_bms_get_percent_charge); |
| 1272 | |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 1273 | int pm8921_bms_get_fcc(void) |
| 1274 | { |
| 1275 | int batt_temp, rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1276 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 1277 | |
| 1278 | if (!the_chip) { |
| 1279 | pr_err("called before initialization\n"); |
| 1280 | return -EINVAL; |
| 1281 | } |
| 1282 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1283 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 1284 | if (rc) { |
| 1285 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 1286 | the_chip->batt_temp_channel, rc); |
| 1287 | return rc; |
| 1288 | } |
| 1289 | pr_debug("batt_temp phy = %lld meas = 0x%llx", result.physical, |
| 1290 | result.measurement); |
| 1291 | batt_temp = (int)result.physical; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1292 | return calculate_fcc_uah(the_chip, batt_temp, last_chargecycles); |
Abhijeet Dharmapurikar | 325bdc9 | 2011-09-07 20:45:49 -0700 | [diff] [blame] | 1293 | } |
| 1294 | EXPORT_SYMBOL_GPL(pm8921_bms_get_fcc); |
| 1295 | |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 1296 | #define IBAT_TOL_MASK 0x0F |
| 1297 | #define OCV_TOL_MASK 0xF0 |
| 1298 | #define IBAT_TOL_DEFAULT 0x03 |
| 1299 | #define IBAT_TOL_NOCHG 0x0F |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1300 | void pm8921_bms_charging_began(void) |
| 1301 | { |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1302 | int batt_temp, rc; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 1303 | struct pm8xxx_adc_chan_result result; |
| 1304 | struct pm8921_soc_params raw; |
| 1305 | |
| 1306 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
| 1307 | if (rc) { |
| 1308 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 1309 | the_chip->batt_temp_channel, rc); |
| 1310 | return; |
| 1311 | } |
| 1312 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 1313 | result.measurement); |
| 1314 | batt_temp = (int)result.physical; |
| 1315 | |
| 1316 | read_soc_params_raw(the_chip, &raw); |
| 1317 | |
| 1318 | the_chip->start_percent = calculate_state_of_charge(the_chip, &raw, |
| 1319 | batt_temp, last_chargecycles); |
| 1320 | bms_start_percent = the_chip->start_percent; |
| 1321 | bms_start_ocv_uv = raw.last_good_ocv_uv; |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1322 | calculate_cc_uah(the_chip, raw.cc, &bms_start_cc_uah); |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 1323 | pm_bms_masked_write(the_chip, BMS_TOLERANCES, |
| 1324 | IBAT_TOL_MASK, IBAT_TOL_DEFAULT); |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1325 | pr_debug("start_percent = %u%%\n", the_chip->start_percent); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1326 | } |
| 1327 | EXPORT_SYMBOL_GPL(pm8921_bms_charging_began); |
| 1328 | |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 1329 | #define DELTA_FCC_PERCENT 3 |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1330 | void pm8921_bms_charging_end(int is_battery_full) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1331 | { |
Abhijeet Dharmapurikar | da8c3d5 | 2012-01-06 14:23:13 -0800 | [diff] [blame] | 1332 | int batt_temp, rc; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1333 | struct pm8xxx_adc_chan_result result; |
| 1334 | struct pm8921_soc_params raw; |
| 1335 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1336 | if (the_chip == NULL) |
| 1337 | return; |
| 1338 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1339 | rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result); |
| 1340 | if (rc) { |
| 1341 | pr_err("error reading adc channel = %d, rc = %d\n", |
| 1342 | the_chip->batt_temp_channel, rc); |
| 1343 | return; |
| 1344 | } |
| 1345 | pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical, |
| 1346 | result.measurement); |
| 1347 | batt_temp = (int)result.physical; |
| 1348 | |
| 1349 | read_soc_params_raw(the_chip, &raw); |
| 1350 | |
Abhijeet Dharmapurikar | 57aeb92 | 2012-01-25 13:22:26 -0800 | [diff] [blame] | 1351 | calculate_cc_uah(the_chip, raw.cc, &bms_end_cc_uah); |
| 1352 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1353 | if (is_battery_full) { |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 1354 | unsigned long flags; |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1355 | int fcc_uah, new_fcc_uah, delta_fcc_uah; |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1356 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1357 | new_fcc_uah = calculate_real_fcc_uah(the_chip, &raw, |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 1358 | batt_temp, last_chargecycles, |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1359 | &fcc_uah); |
| 1360 | delta_fcc_uah = new_fcc_uah - fcc_uah; |
| 1361 | if (delta_fcc_uah < 0) |
| 1362 | delta_fcc_uah = -delta_fcc_uah; |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 1363 | |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1364 | if (delta_fcc_uah * 100 <= (DELTA_FCC_PERCENT * fcc_uah)) { |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 1365 | pr_debug("delta_fcc=%d < %d percent of fcc=%d\n", |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1366 | delta_fcc_uah, DELTA_FCC_PERCENT, fcc_uah); |
| 1367 | last_real_fcc_mah = new_fcc_uah/1000; |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 1368 | last_real_fcc_batt_temp = batt_temp; |
| 1369 | readjust_fcc_table(); |
| 1370 | } else { |
| 1371 | pr_debug("delta_fcc=%d > %d percent of fcc=%d" |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1372 | "will not update real fcc\n", |
| 1373 | delta_fcc_uah, DELTA_FCC_PERCENT, fcc_uah); |
Abhijeet Dharmapurikar | 8309df4 | 2011-11-16 21:04:09 -0800 | [diff] [blame] | 1374 | } |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 1375 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1376 | spin_lock_irqsave(&the_chip->bms_100_lock, flags); |
| 1377 | the_chip->ocv_reading_at_100 = raw.last_good_ocv_raw; |
| 1378 | the_chip->cc_reading_at_100 = raw.cc; |
| 1379 | spin_unlock_irqrestore(&the_chip->bms_100_lock, flags); |
| 1380 | pr_debug("EOC ocv_reading = 0x%x cc = %d\n", |
Abhijeet Dharmapurikar | 57b06b5 | 2011-11-07 19:14:08 -0800 | [diff] [blame] | 1381 | the_chip->ocv_reading_at_100, |
| 1382 | the_chip->cc_reading_at_100); |
Abhijeet Dharmapurikar | fad7235 | 2011-09-25 23:06:05 -0700 | [diff] [blame] | 1383 | } |
| 1384 | |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1385 | the_chip->end_percent = calculate_state_of_charge(the_chip, &raw, |
| 1386 | batt_temp, last_chargecycles); |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 1387 | |
| 1388 | bms_end_percent = the_chip->end_percent; |
| 1389 | bms_end_ocv_uv = raw.last_good_ocv_uv; |
Abhijeet Dharmapurikar | ab83331 | 2011-11-22 18:26:09 -0800 | [diff] [blame] | 1390 | |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1391 | if (the_chip->end_percent > the_chip->start_percent) { |
Abhijeet Dharmapurikar | 8a113f8 | 2012-01-19 10:58:45 -0800 | [diff] [blame] | 1392 | last_charge_increase += |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1393 | the_chip->end_percent - the_chip->start_percent; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1394 | if (last_charge_increase > 100) { |
| 1395 | last_chargecycles++; |
| 1396 | last_charge_increase = last_charge_increase % 100; |
| 1397 | } |
| 1398 | } |
| 1399 | pr_debug("end_percent = %u%% last_charge_increase = %d" |
| 1400 | "last_chargecycles = %d\n", |
Abhijeet Dharmapurikar | 2ce2cc1 | 2011-11-02 15:40:29 -0700 | [diff] [blame] | 1401 | the_chip->end_percent, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1402 | last_charge_increase, |
| 1403 | last_chargecycles); |
Abhijeet Dharmapurikar | dba91f4 | 2011-12-21 16:56:13 -0800 | [diff] [blame] | 1404 | the_chip->start_percent = -EINVAL; |
| 1405 | the_chip->end_percent = -EINVAL; |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 1406 | pm_bms_masked_write(the_chip, BMS_TOLERANCES, |
| 1407 | IBAT_TOL_MASK, IBAT_TOL_NOCHG); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1408 | } |
| 1409 | EXPORT_SYMBOL_GPL(pm8921_bms_charging_end); |
| 1410 | |
| 1411 | static irqreturn_t pm8921_bms_sbi_write_ok_handler(int irq, void *data) |
| 1412 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1413 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1414 | return IRQ_HANDLED; |
| 1415 | } |
| 1416 | |
| 1417 | static irqreturn_t pm8921_bms_cc_thr_handler(int irq, void *data) |
| 1418 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1419 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1420 | return IRQ_HANDLED; |
| 1421 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1422 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1423 | static irqreturn_t pm8921_bms_vsense_thr_handler(int irq, void *data) |
| 1424 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1425 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1426 | return IRQ_HANDLED; |
| 1427 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1428 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1429 | static irqreturn_t pm8921_bms_vsense_for_r_handler(int irq, void *data) |
| 1430 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1431 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1432 | return IRQ_HANDLED; |
| 1433 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1434 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1435 | static irqreturn_t pm8921_bms_ocv_for_r_handler(int irq, void *data) |
| 1436 | { |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1437 | struct pm8921_bms_chip *chip = data; |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1438 | |
| 1439 | pr_debug("irq = %d triggered", irq); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1440 | schedule_work(&chip->calib_hkadc_work); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1441 | return IRQ_HANDLED; |
| 1442 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1443 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1444 | static irqreturn_t pm8921_bms_good_ocv_handler(int irq, void *data) |
| 1445 | { |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1446 | struct pm8921_bms_chip *chip = data; |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1447 | |
| 1448 | pr_debug("irq = %d triggered", irq); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1449 | schedule_work(&chip->calib_hkadc_work); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1450 | return IRQ_HANDLED; |
| 1451 | } |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1452 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1453 | static irqreturn_t pm8921_bms_vsense_avg_handler(int irq, void *data) |
| 1454 | { |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1455 | pr_debug("irq = %d triggered", irq); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1456 | return IRQ_HANDLED; |
| 1457 | } |
| 1458 | |
| 1459 | struct pm_bms_irq_init_data { |
| 1460 | unsigned int irq_id; |
| 1461 | char *name; |
| 1462 | unsigned long flags; |
| 1463 | irqreturn_t (*handler)(int, void *); |
| 1464 | }; |
| 1465 | |
| 1466 | #define BMS_IRQ(_id, _flags, _handler) \ |
| 1467 | { \ |
| 1468 | .irq_id = _id, \ |
| 1469 | .name = #_id, \ |
| 1470 | .flags = _flags, \ |
| 1471 | .handler = _handler, \ |
| 1472 | } |
| 1473 | |
| 1474 | struct pm_bms_irq_init_data bms_irq_data[] = { |
| 1475 | BMS_IRQ(PM8921_BMS_SBI_WRITE_OK, IRQF_TRIGGER_RISING, |
| 1476 | pm8921_bms_sbi_write_ok_handler), |
| 1477 | BMS_IRQ(PM8921_BMS_CC_THR, IRQF_TRIGGER_RISING, |
| 1478 | pm8921_bms_cc_thr_handler), |
| 1479 | BMS_IRQ(PM8921_BMS_VSENSE_THR, IRQF_TRIGGER_RISING, |
| 1480 | pm8921_bms_vsense_thr_handler), |
| 1481 | BMS_IRQ(PM8921_BMS_VSENSE_FOR_R, IRQF_TRIGGER_RISING, |
| 1482 | pm8921_bms_vsense_for_r_handler), |
| 1483 | BMS_IRQ(PM8921_BMS_OCV_FOR_R, IRQF_TRIGGER_RISING, |
| 1484 | pm8921_bms_ocv_for_r_handler), |
| 1485 | BMS_IRQ(PM8921_BMS_GOOD_OCV, IRQF_TRIGGER_RISING, |
| 1486 | pm8921_bms_good_ocv_handler), |
| 1487 | BMS_IRQ(PM8921_BMS_VSENSE_AVG, IRQF_TRIGGER_RISING, |
| 1488 | pm8921_bms_vsense_avg_handler), |
| 1489 | }; |
| 1490 | |
| 1491 | static void free_irqs(struct pm8921_bms_chip *chip) |
| 1492 | { |
| 1493 | int i; |
| 1494 | |
| 1495 | for (i = 0; i < PM_BMS_MAX_INTS; i++) |
| 1496 | if (chip->pmic_bms_irq[i]) { |
| 1497 | free_irq(chip->pmic_bms_irq[i], NULL); |
| 1498 | chip->pmic_bms_irq[i] = 0; |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | static int __devinit request_irqs(struct pm8921_bms_chip *chip, |
| 1503 | struct platform_device *pdev) |
| 1504 | { |
| 1505 | struct resource *res; |
| 1506 | int ret, i; |
| 1507 | |
| 1508 | ret = 0; |
| 1509 | bitmap_fill(chip->enabled_irqs, PM_BMS_MAX_INTS); |
| 1510 | |
| 1511 | for (i = 0; i < ARRAY_SIZE(bms_irq_data); i++) { |
| 1512 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, |
| 1513 | bms_irq_data[i].name); |
| 1514 | if (res == NULL) { |
| 1515 | pr_err("couldn't find %s\n", bms_irq_data[i].name); |
| 1516 | goto err_out; |
| 1517 | } |
| 1518 | ret = request_irq(res->start, bms_irq_data[i].handler, |
| 1519 | bms_irq_data[i].flags, |
| 1520 | bms_irq_data[i].name, chip); |
| 1521 | if (ret < 0) { |
| 1522 | pr_err("couldn't request %d (%s) %d\n", res->start, |
| 1523 | bms_irq_data[i].name, ret); |
| 1524 | goto err_out; |
| 1525 | } |
| 1526 | chip->pmic_bms_irq[bms_irq_data[i].irq_id] = res->start; |
| 1527 | pm8921_bms_disable_irq(chip, bms_irq_data[i].irq_id); |
| 1528 | } |
| 1529 | return 0; |
| 1530 | |
| 1531 | err_out: |
| 1532 | free_irqs(chip); |
| 1533 | return -EINVAL; |
| 1534 | } |
| 1535 | |
| 1536 | #define EN_BMS_BIT BIT(7) |
| 1537 | #define EN_PON_HS_BIT BIT(0) |
| 1538 | static int __devinit pm8921_bms_hw_init(struct pm8921_bms_chip *chip) |
| 1539 | { |
| 1540 | int rc; |
| 1541 | |
| 1542 | rc = pm_bms_masked_write(chip, BMS_CONTROL, |
| 1543 | EN_BMS_BIT | EN_PON_HS_BIT, EN_BMS_BIT | EN_PON_HS_BIT); |
| 1544 | if (rc) { |
| 1545 | pr_err("failed to enable pon and bms addr = %d %d", |
| 1546 | BMS_CONTROL, rc); |
| 1547 | } |
| 1548 | |
Abhijeet Dharmapurikar | cad865a | 2012-02-09 17:14:02 -0800 | [diff] [blame] | 1549 | /* The charger will call start charge later if usb is present */ |
| 1550 | pm_bms_masked_write(chip, BMS_TOLERANCES, |
| 1551 | IBAT_TOL_MASK, IBAT_TOL_NOCHG); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1552 | return 0; |
| 1553 | } |
| 1554 | |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1555 | static void check_initial_ocv(struct pm8921_bms_chip *chip) |
| 1556 | { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1557 | int ocv_uv, rc; |
| 1558 | int16_t ocv_raw; |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1559 | |
| 1560 | /* |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1561 | * Check if a ocv is available in bms hw, |
| 1562 | * if not compute it here at boot time and save it |
| 1563 | * in the last_ocv_uv. |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1564 | */ |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1565 | ocv_uv = 0; |
| 1566 | pm_bms_read_output_data(chip, LAST_GOOD_OCV_VALUE, &ocv_raw); |
| 1567 | rc = convert_vbatt_raw_to_uv(chip, ocv_raw, &ocv_uv); |
| 1568 | if (rc || ocv_uv == 0) { |
| 1569 | rc = adc_based_ocv(chip, &ocv_uv); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1570 | if (rc) { |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1571 | pr_err("failed to read adc based ocv_uv rc = %d\n", rc); |
| 1572 | ocv_uv = DEFAULT_OCV_MICROVOLTS; |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1573 | } |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1574 | last_ocv_uv = ocv_uv; |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1575 | } |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1576 | pr_debug("ocv_uv = %d last_ocv_uv = %d\n", ocv_uv, last_ocv_uv); |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1579 | static int64_t read_battery_id(struct pm8921_bms_chip *chip) |
| 1580 | { |
| 1581 | int rc; |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1582 | struct pm8xxx_adc_chan_result result; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1583 | |
Siddartha Mohanadoss | af91d90 | 2011-10-20 10:23:34 -0700 | [diff] [blame] | 1584 | rc = pm8xxx_adc_read(chip->batt_id_channel, &result); |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1585 | if (rc) { |
| 1586 | pr_err("error reading batt id channel = %d, rc = %d\n", |
| 1587 | chip->vbat_channel, rc); |
| 1588 | return rc; |
| 1589 | } |
| 1590 | pr_debug("batt_id phy = %lld meas = 0x%llx\n", result.physical, |
| 1591 | result.measurement); |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 1592 | return result.adc_code; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1593 | } |
| 1594 | |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 1595 | #define PALLADIUM_ID_MIN 0x7F40 |
| 1596 | #define PALLADIUM_ID_MAX 0x7F5A |
| 1597 | #define DESAY_5200_ID_MIN 0x7F7F |
| 1598 | #define DESAY_5200_ID_MAX 0x802F |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1599 | static int set_battery_data(struct pm8921_bms_chip *chip) |
| 1600 | { |
| 1601 | int64_t battery_id; |
| 1602 | |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 1603 | if (chip->batt_type == BATT_DESAY) |
| 1604 | goto desay; |
| 1605 | else if (chip->batt_type == BATT_PALLADIUM) |
| 1606 | goto palladium; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1607 | |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 1608 | battery_id = read_battery_id(chip); |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1609 | if (battery_id < 0) { |
| 1610 | pr_err("cannot read battery id err = %lld\n", battery_id); |
| 1611 | return battery_id; |
| 1612 | } |
| 1613 | |
| 1614 | if (is_between(PALLADIUM_ID_MIN, PALLADIUM_ID_MAX, battery_id)) { |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 1615 | goto palladium; |
| 1616 | } else if (is_between(DESAY_5200_ID_MIN, DESAY_5200_ID_MAX, |
| 1617 | battery_id)) { |
| 1618 | goto desay; |
| 1619 | } else { |
| 1620 | goto unknown; |
| 1621 | } |
| 1622 | |
| 1623 | palladium: |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1624 | chip->fcc = palladium_1500_data.fcc; |
| 1625 | chip->fcc_temp_lut = palladium_1500_data.fcc_temp_lut; |
| 1626 | chip->fcc_sf_lut = palladium_1500_data.fcc_sf_lut; |
| 1627 | chip->pc_temp_ocv_lut = palladium_1500_data.pc_temp_ocv_lut; |
| 1628 | chip->pc_sf_lut = palladium_1500_data.pc_sf_lut; |
| 1629 | return 0; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 1630 | desay: |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 1631 | chip->fcc = desay_5200_data.fcc; |
| 1632 | chip->fcc_temp_lut = desay_5200_data.fcc_temp_lut; |
| 1633 | chip->fcc_sf_lut = desay_5200_data.fcc_sf_lut; |
| 1634 | chip->pc_temp_ocv_lut = desay_5200_data.pc_temp_ocv_lut; |
| 1635 | chip->pc_sf_lut = desay_5200_data.pc_sf_lut; |
| 1636 | return 0; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 1637 | unknown: |
David Keitel | 8f2601b | 2012-02-14 22:31:07 -0800 | [diff] [blame] | 1638 | pr_warn("invalid battery id, palladium 1500 assumed batt_id %llx\n", |
| 1639 | battery_id); |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1640 | chip->fcc = palladium_1500_data.fcc; |
| 1641 | chip->fcc_temp_lut = palladium_1500_data.fcc_temp_lut; |
| 1642 | chip->fcc_sf_lut = palladium_1500_data.fcc_sf_lut; |
| 1643 | chip->pc_temp_ocv_lut = palladium_1500_data.pc_temp_ocv_lut; |
| 1644 | chip->pc_sf_lut = palladium_1500_data.pc_sf_lut; |
| 1645 | return 0; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1646 | } |
| 1647 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1648 | enum { |
| 1649 | CALC_RBATT, |
| 1650 | CALC_FCC, |
| 1651 | CALC_PC, |
| 1652 | CALC_SOC, |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1653 | CALIB_HKADC, |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1654 | CALIB_CCADC, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1655 | }; |
| 1656 | |
| 1657 | static int test_batt_temp = 5; |
| 1658 | static int test_chargecycle = 150; |
| 1659 | static int test_ocv = 3900000; |
| 1660 | enum { |
| 1661 | TEST_BATT_TEMP, |
| 1662 | TEST_CHARGE_CYCLE, |
| 1663 | TEST_OCV, |
| 1664 | }; |
| 1665 | static int get_test_param(void *data, u64 * val) |
| 1666 | { |
| 1667 | switch ((int)data) { |
| 1668 | case TEST_BATT_TEMP: |
| 1669 | *val = test_batt_temp; |
| 1670 | break; |
| 1671 | case TEST_CHARGE_CYCLE: |
| 1672 | *val = test_chargecycle; |
| 1673 | break; |
| 1674 | case TEST_OCV: |
| 1675 | *val = test_ocv; |
| 1676 | break; |
| 1677 | default: |
| 1678 | return -EINVAL; |
| 1679 | } |
| 1680 | return 0; |
| 1681 | } |
| 1682 | static int set_test_param(void *data, u64 val) |
| 1683 | { |
| 1684 | switch ((int)data) { |
| 1685 | case TEST_BATT_TEMP: |
| 1686 | test_batt_temp = (int)val; |
| 1687 | break; |
| 1688 | case TEST_CHARGE_CYCLE: |
| 1689 | test_chargecycle = (int)val; |
| 1690 | break; |
| 1691 | case TEST_OCV: |
| 1692 | test_ocv = (int)val; |
| 1693 | break; |
| 1694 | default: |
| 1695 | return -EINVAL; |
| 1696 | } |
| 1697 | return 0; |
| 1698 | } |
| 1699 | DEFINE_SIMPLE_ATTRIBUTE(temp_fops, get_test_param, set_test_param, "%llu\n"); |
| 1700 | |
| 1701 | static int get_calc(void *data, u64 * val) |
| 1702 | { |
| 1703 | int param = (int)data; |
| 1704 | int ret = 0; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1705 | struct pm8921_soc_params raw; |
| 1706 | |
| 1707 | read_soc_params_raw(the_chip, &raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1708 | |
| 1709 | *val = 0; |
| 1710 | |
| 1711 | /* global irq number passed in via data */ |
| 1712 | switch (param) { |
| 1713 | case CALC_RBATT: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1714 | *val = calculate_rbatt(the_chip, &raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1715 | break; |
| 1716 | case CALC_FCC: |
Abhijeet Dharmapurikar | 9c1e399 | 2011-12-18 15:03:20 -0800 | [diff] [blame] | 1717 | *val = calculate_fcc_uah(the_chip, test_batt_temp, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1718 | test_chargecycle); |
| 1719 | break; |
| 1720 | case CALC_PC: |
| 1721 | *val = calculate_pc(the_chip, test_ocv, test_batt_temp, |
| 1722 | test_chargecycle); |
| 1723 | break; |
| 1724 | case CALC_SOC: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1725 | *val = calculate_state_of_charge(the_chip, &raw, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1726 | test_batt_temp, test_chargecycle); |
| 1727 | break; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1728 | case CALIB_HKADC: |
| 1729 | /* reading this will trigger calibration */ |
| 1730 | *val = 0; |
| 1731 | calib_hkadc(the_chip); |
| 1732 | break; |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1733 | case CALIB_CCADC: |
| 1734 | /* reading this will trigger calibration */ |
| 1735 | *val = 0; |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 1736 | pm8xxx_calib_ccadc(); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1737 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1738 | default: |
| 1739 | ret = -EINVAL; |
| 1740 | } |
| 1741 | return ret; |
| 1742 | } |
| 1743 | DEFINE_SIMPLE_ATTRIBUTE(calc_fops, get_calc, NULL, "%llu\n"); |
| 1744 | |
| 1745 | static int get_reading(void *data, u64 * val) |
| 1746 | { |
| 1747 | int param = (int)data; |
| 1748 | int ret = 0; |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1749 | struct pm8921_soc_params raw; |
| 1750 | |
| 1751 | read_soc_params_raw(the_chip, &raw); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1752 | |
| 1753 | *val = 0; |
| 1754 | |
| 1755 | /* global irq number passed in via data */ |
| 1756 | switch (param) { |
| 1757 | case CC_MSB: |
| 1758 | case CC_LSB: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1759 | *val = raw.cc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1760 | break; |
| 1761 | case LAST_GOOD_OCV_VALUE: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1762 | *val = raw.last_good_ocv_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1763 | break; |
| 1764 | case VBATT_FOR_RBATT: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1765 | *val = raw.vbatt_for_rbatt_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1766 | break; |
| 1767 | case VSENSE_FOR_RBATT: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1768 | *val = raw.vsense_for_rbatt_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1769 | break; |
| 1770 | case OCV_FOR_RBATT: |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1771 | *val = raw.ocv_for_rbatt_uv; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1772 | break; |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 1773 | case VSENSE_AVG: |
| 1774 | read_vsense_avg(the_chip, (uint *)val); |
| 1775 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1776 | default: |
| 1777 | ret = -EINVAL; |
| 1778 | } |
| 1779 | return ret; |
| 1780 | } |
Abhijeet Dharmapurikar | e0c3e5f | 2011-07-11 21:17:23 -0700 | [diff] [blame] | 1781 | DEFINE_SIMPLE_ATTRIBUTE(reading_fops, get_reading, NULL, "%lld\n"); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1782 | |
| 1783 | static int get_rt_status(void *data, u64 * val) |
| 1784 | { |
| 1785 | int i = (int)data; |
| 1786 | int ret; |
| 1787 | |
| 1788 | /* global irq number passed in via data */ |
| 1789 | ret = pm_bms_get_rt_status(the_chip, i); |
| 1790 | *val = ret; |
| 1791 | return 0; |
| 1792 | } |
| 1793 | DEFINE_SIMPLE_ATTRIBUTE(rt_fops, get_rt_status, NULL, "%llu\n"); |
| 1794 | |
| 1795 | static int get_reg(void *data, u64 * val) |
| 1796 | { |
| 1797 | int addr = (int)data; |
| 1798 | int ret; |
| 1799 | u8 temp; |
| 1800 | |
| 1801 | ret = pm8xxx_readb(the_chip->dev->parent, addr, &temp); |
| 1802 | if (ret) { |
| 1803 | pr_err("pm8xxx_readb to %x value = %d errored = %d\n", |
| 1804 | addr, temp, ret); |
| 1805 | return -EAGAIN; |
| 1806 | } |
| 1807 | *val = temp; |
| 1808 | return 0; |
| 1809 | } |
| 1810 | |
| 1811 | static int set_reg(void *data, u64 val) |
| 1812 | { |
| 1813 | int addr = (int)data; |
| 1814 | int ret; |
| 1815 | u8 temp; |
| 1816 | |
| 1817 | temp = (u8) val; |
| 1818 | ret = pm8xxx_writeb(the_chip->dev->parent, addr, temp); |
| 1819 | if (ret) { |
| 1820 | pr_err("pm8xxx_writeb to %x value = %d errored = %d\n", |
| 1821 | addr, temp, ret); |
| 1822 | return -EAGAIN; |
| 1823 | } |
| 1824 | return 0; |
| 1825 | } |
| 1826 | DEFINE_SIMPLE_ATTRIBUTE(reg_fops, get_reg, set_reg, "0x%02llx\n"); |
| 1827 | |
| 1828 | static void create_debugfs_entries(struct pm8921_bms_chip *chip) |
| 1829 | { |
| 1830 | int i; |
| 1831 | |
Abhijeet Dharmapurikar | 82d9398 | 2011-11-09 15:52:25 -0800 | [diff] [blame] | 1832 | chip->dent = debugfs_create_dir("pm8921-bms", NULL); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1833 | |
| 1834 | if (IS_ERR(chip->dent)) { |
| 1835 | pr_err("pmic bms couldnt create debugfs dir\n"); |
| 1836 | return; |
| 1837 | } |
| 1838 | |
| 1839 | debugfs_create_file("BMS_CONTROL", 0644, chip->dent, |
| 1840 | (void *)BMS_CONTROL, ®_fops); |
| 1841 | debugfs_create_file("BMS_OUTPUT0", 0644, chip->dent, |
| 1842 | (void *)BMS_OUTPUT0, ®_fops); |
| 1843 | debugfs_create_file("BMS_OUTPUT1", 0644, chip->dent, |
| 1844 | (void *)BMS_OUTPUT1, ®_fops); |
| 1845 | debugfs_create_file("BMS_TEST1", 0644, chip->dent, |
| 1846 | (void *)BMS_TEST1, ®_fops); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1847 | |
| 1848 | debugfs_create_file("test_batt_temp", 0644, chip->dent, |
| 1849 | (void *)TEST_BATT_TEMP, &temp_fops); |
| 1850 | debugfs_create_file("test_chargecycle", 0644, chip->dent, |
| 1851 | (void *)TEST_CHARGE_CYCLE, &temp_fops); |
| 1852 | debugfs_create_file("test_ocv", 0644, chip->dent, |
| 1853 | (void *)TEST_OCV, &temp_fops); |
| 1854 | |
| 1855 | debugfs_create_file("read_cc", 0644, chip->dent, |
| 1856 | (void *)CC_MSB, &reading_fops); |
| 1857 | debugfs_create_file("read_last_good_ocv", 0644, chip->dent, |
| 1858 | (void *)LAST_GOOD_OCV_VALUE, &reading_fops); |
| 1859 | debugfs_create_file("read_vbatt_for_rbatt", 0644, chip->dent, |
| 1860 | (void *)VBATT_FOR_RBATT, &reading_fops); |
| 1861 | debugfs_create_file("read_vsense_for_rbatt", 0644, chip->dent, |
| 1862 | (void *)VSENSE_FOR_RBATT, &reading_fops); |
| 1863 | debugfs_create_file("read_ocv_for_rbatt", 0644, chip->dent, |
| 1864 | (void *)OCV_FOR_RBATT, &reading_fops); |
Abhijeet Dharmapurikar | 2fb6f08 | 2011-06-28 17:10:27 -0700 | [diff] [blame] | 1865 | debugfs_create_file("read_vsense_avg", 0644, chip->dent, |
| 1866 | (void *)VSENSE_AVG, &reading_fops); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1867 | |
| 1868 | debugfs_create_file("show_rbatt", 0644, chip->dent, |
| 1869 | (void *)CALC_RBATT, &calc_fops); |
| 1870 | debugfs_create_file("show_fcc", 0644, chip->dent, |
| 1871 | (void *)CALC_FCC, &calc_fops); |
| 1872 | debugfs_create_file("show_pc", 0644, chip->dent, |
| 1873 | (void *)CALC_PC, &calc_fops); |
| 1874 | debugfs_create_file("show_soc", 0644, chip->dent, |
| 1875 | (void *)CALC_SOC, &calc_fops); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1876 | debugfs_create_file("calib_hkadc", 0644, chip->dent, |
| 1877 | (void *)CALIB_HKADC, &calc_fops); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1878 | debugfs_create_file("calib_ccadc", 0644, chip->dent, |
| 1879 | (void *)CALIB_CCADC, &calc_fops); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1880 | |
| 1881 | for (i = 0; i < ARRAY_SIZE(bms_irq_data); i++) { |
| 1882 | if (chip->pmic_bms_irq[bms_irq_data[i].irq_id]) |
| 1883 | debugfs_create_file(bms_irq_data[i].name, 0444, |
| 1884 | chip->dent, |
| 1885 | (void *)bms_irq_data[i].irq_id, |
| 1886 | &rt_fops); |
| 1887 | } |
| 1888 | } |
| 1889 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1890 | static int __devinit pm8921_bms_probe(struct platform_device *pdev) |
| 1891 | { |
| 1892 | int rc = 0; |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 1893 | int vbatt; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1894 | struct pm8921_bms_chip *chip; |
| 1895 | const struct pm8921_bms_platform_data *pdata |
| 1896 | = pdev->dev.platform_data; |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 1897 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1898 | if (!pdata) { |
| 1899 | pr_err("missing platform data\n"); |
| 1900 | return -EINVAL; |
| 1901 | } |
| 1902 | |
Abhijeet Dharmapurikar | 15e853d | 2011-06-27 20:55:47 -0700 | [diff] [blame] | 1903 | chip = kzalloc(sizeof(struct pm8921_bms_chip), GFP_KERNEL); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1904 | if (!chip) { |
| 1905 | pr_err("Cannot allocate pm_bms_chip\n"); |
| 1906 | return -ENOMEM; |
| 1907 | } |
Abhijeet Dharmapurikar | 3f95fa8 | 2011-10-05 19:14:32 -0700 | [diff] [blame] | 1908 | spin_lock_init(&chip->bms_output_lock); |
Abhijeet Dharmapurikar | 228acb9 | 2011-11-21 19:21:48 -0800 | [diff] [blame] | 1909 | spin_lock_init(&chip->bms_100_lock); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1910 | chip->dev = &pdev->dev; |
| 1911 | chip->r_sense = pdata->r_sense; |
| 1912 | chip->i_test = pdata->i_test; |
| 1913 | chip->v_failure = pdata->v_failure; |
| 1914 | chip->calib_delay_ms = pdata->calib_delay_ms; |
Abhijeet Dharmapurikar | a93ede8 | 2011-11-17 12:20:03 -0800 | [diff] [blame] | 1915 | chip->max_voltage_uv = pdata->max_voltage_uv; |
David Keitel | 35e1187 | 2012-02-17 17:40:42 -0800 | [diff] [blame] | 1916 | chip->batt_type = pdata->battery_type; |
Abhijeet Dharmapurikar | dba91f4 | 2011-12-21 16:56:13 -0800 | [diff] [blame] | 1917 | chip->start_percent = -EINVAL; |
| 1918 | chip->end_percent = -EINVAL; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1919 | rc = set_battery_data(chip); |
| 1920 | if (rc) { |
| 1921 | pr_err("%s bad battery data %d\n", __func__, rc); |
Abhijeet Dharmapurikar | 4a4456e | 2011-09-27 15:10:38 -0700 | [diff] [blame] | 1922 | goto free_chip; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1923 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1924 | |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 1925 | chip->batt_temp_channel = pdata->bms_cdata.batt_temp_channel; |
| 1926 | chip->vbat_channel = pdata->bms_cdata.vbat_channel; |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1927 | chip->ref625mv_channel = pdata->bms_cdata.ref625mv_channel; |
| 1928 | chip->ref1p25v_channel = pdata->bms_cdata.ref1p25v_channel; |
Abhijeet Dharmapurikar | e922bbb | 2011-09-01 13:05:06 -0700 | [diff] [blame] | 1929 | chip->batt_id_channel = pdata->bms_cdata.batt_id_channel; |
Abhijeet Dharmapurikar | fa77f1a | 2011-06-27 21:11:51 -0700 | [diff] [blame] | 1930 | chip->revision = pm8xxx_get_revision(chip->dev->parent); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1931 | INIT_WORK(&chip->calib_hkadc_work, calibrate_hkadc_work); |
Abhijeet Dharmapurikar | c448d98 | 2011-06-28 20:48:36 -0700 | [diff] [blame] | 1932 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1933 | rc = request_irqs(chip, pdev); |
| 1934 | if (rc) { |
| 1935 | pr_err("couldn't register interrupts rc = %d\n", rc); |
| 1936 | goto free_chip; |
| 1937 | } |
| 1938 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1939 | rc = pm8921_bms_hw_init(chip); |
| 1940 | if (rc) { |
| 1941 | pr_err("couldn't init hardware rc = %d\n", rc); |
| 1942 | goto free_irqs; |
| 1943 | } |
| 1944 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1945 | platform_set_drvdata(pdev, chip); |
| 1946 | the_chip = chip; |
| 1947 | create_debugfs_entries(chip); |
| 1948 | |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1949 | check_initial_ocv(chip); |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1950 | |
| 1951 | INIT_DELAYED_WORK(&chip->calib_ccadc_work, calibrate_ccadc_work); |
| 1952 | /* begin calibration only on chips > 2.0 */ |
| 1953 | if (chip->revision >= PM8XXX_REVISION_8921_2p0) |
Abhijeet Dharmapurikar | ccfc4f3 | 2012-01-16 17:35:18 -0800 | [diff] [blame] | 1954 | schedule_delayed_work(&chip->calib_ccadc_work, 0); |
Abhijeet Dharmapurikar | c353222 | 2011-07-20 14:48:02 -0700 | [diff] [blame] | 1955 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 1956 | /* initial hkadc calibration */ |
| 1957 | schedule_work(&chip->calib_hkadc_work); |
Abhijeet Dharmapurikar | 76d4db9 | 2011-07-19 11:54:52 -0700 | [diff] [blame] | 1958 | /* enable the vbatt reading interrupts for scheduling hkadc calib */ |
| 1959 | pm8921_bms_enable_irq(chip, PM8921_BMS_GOOD_OCV); |
| 1960 | pm8921_bms_enable_irq(chip, PM8921_BMS_OCV_FOR_R); |
Abhijeet Dharmapurikar | 21ebadd | 2011-09-28 21:14:16 -0700 | [diff] [blame] | 1961 | |
Abhijeet Dharmapurikar | c23264c | 2011-10-28 19:34:56 -0700 | [diff] [blame] | 1962 | get_battery_uvolts(chip, &vbatt); |
| 1963 | pr_info("OK battery_capacity_at_boot=%d volt = %d ocv = %d\n", |
| 1964 | pm8921_bms_get_percent_charge(), |
| 1965 | vbatt, last_ocv_uv); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1966 | return 0; |
| 1967 | |
Abhijeet Dharmapurikar | 1834c6d | 2011-10-28 20:00:02 -0700 | [diff] [blame] | 1968 | free_irqs: |
| 1969 | free_irqs(chip); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1970 | free_chip: |
| 1971 | kfree(chip); |
| 1972 | return rc; |
| 1973 | } |
| 1974 | |
| 1975 | static int __devexit pm8921_bms_remove(struct platform_device *pdev) |
| 1976 | { |
| 1977 | struct pm8921_bms_chip *chip = platform_get_drvdata(pdev); |
| 1978 | |
| 1979 | free_irqs(chip); |
Abhijeet Dharmapurikar | 05d4274 | 2011-10-18 19:26:03 -0700 | [diff] [blame] | 1980 | kfree(chip->adjusted_fcc_temp_lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1981 | platform_set_drvdata(pdev, NULL); |
| 1982 | the_chip = NULL; |
| 1983 | kfree(chip); |
| 1984 | return 0; |
| 1985 | } |
| 1986 | |
| 1987 | static struct platform_driver pm8921_bms_driver = { |
| 1988 | .probe = pm8921_bms_probe, |
| 1989 | .remove = __devexit_p(pm8921_bms_remove), |
| 1990 | .driver = { |
| 1991 | .name = PM8921_BMS_DEV_NAME, |
| 1992 | .owner = THIS_MODULE, |
| 1993 | }, |
| 1994 | }; |
| 1995 | |
| 1996 | static int __init pm8921_bms_init(void) |
| 1997 | { |
| 1998 | return platform_driver_register(&pm8921_bms_driver); |
| 1999 | } |
| 2000 | |
| 2001 | static void __exit pm8921_bms_exit(void) |
| 2002 | { |
| 2003 | platform_driver_unregister(&pm8921_bms_driver); |
| 2004 | } |
| 2005 | |
| 2006 | late_initcall(pm8921_bms_init); |
| 2007 | module_exit(pm8921_bms_exit); |
| 2008 | |
| 2009 | MODULE_LICENSE("GPL v2"); |
| 2010 | MODULE_DESCRIPTION("PMIC8921 bms driver"); |
| 2011 | MODULE_VERSION("1.0"); |
| 2012 | MODULE_ALIAS("platform:" PM8921_BMS_DEV_NAME); |