power: pm8921-charger: Add HTC variants of pm8921-charger, pm8921-bms
HTC kernel version: villeu-jb-crc-3.4.10-ae8b65e
Change-Id: I2a0f9fc8b80bbf4fee5bd2d840fcb86a59b0ab68
diff --git a/drivers/power/pm8921-bms-htc.c b/drivers/power/pm8921-bms-htc.c
new file mode 100644
index 0000000..65b6400
--- /dev/null
+++ b/drivers/power/pm8921-bms-htc.c
@@ -0,0 +1,2896 @@
+/* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#define pr_fmt(fmt) "[BATT][BMS] " fmt
+#define pr_fmt_debug(fmt) "[BATT][BMS]%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/mfd/pm8xxx/pm8921-bms-htc.h>
+#include <linux/mfd/pm8xxx/pm8921-charger-htc.h>
+#include <linux/mfd/pm8xxx/core.h>
+#include <linux/mfd/pm8xxx/pm8xxx-adc.h>
+#include <linux/mfd/pm8xxx/ccadc.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <mach/board_htc.h>
+
+#ifdef CONFIG_HTC_BATT_8960
+#include "mach/htc_battery_cell.h"
+#endif
+
+#if defined(pr_debug)
+#undef pr_debug
+#endif
+#define pr_debug(fmt, ...) do { \
+ if (flag_enable_bms_chg_log) \
+ printk(KERN_INFO pr_fmt_debug(fmt), ##__VA_ARGS__); \
+ } while (0)
+static bool flag_enable_bms_chg_log;
+
+#define BMS_CONTROL 0x224
+#define BMS_S1_DELAY 0x225
+#define BMS_OUTPUT0 0x230
+#define BMS_OUTPUT1 0x231
+#define BMS_TOLERANCES 0x232
+#define BMS_TEST1 0x237
+
+#define ADC_ARB_SECP_CNTRL 0x190
+#define ADC_ARB_SECP_AMUX_CNTRL 0x191
+#define ADC_ARB_SECP_ANA_PARAM 0x192
+#define ADC_ARB_SECP_DIG_PARAM 0x193
+#define ADC_ARB_SECP_RSV 0x194
+#define ADC_ARB_SECP_DATA1 0x195
+#define ADC_ARB_SECP_DATA0 0x196
+
+#define ADC_ARB_BMS_CNTRL 0x18D
+#define AMUX_TRIM_2 0x322
+#define TEST_PROGRAM_REV 0x339
+
+#define OCV_UPDATE_STORAGE 0x105
+#define OCV_UPDATE_STORAGE_USE_MASK 0x0F
+
+enum pmic_bms_interrupts {
+ PM8921_BMS_SBI_WRITE_OK,
+ PM8921_BMS_CC_THR,
+ PM8921_BMS_VSENSE_THR,
+ PM8921_BMS_VSENSE_FOR_R,
+ PM8921_BMS_OCV_FOR_R,
+ PM8921_BMS_GOOD_OCV,
+ PM8921_BMS_VSENSE_AVG,
+ PM_BMS_MAX_INTS,
+};
+
+struct pm8921_soc_params {
+ uint16_t last_good_ocv_raw;
+ int cc;
+
+ int last_good_ocv_uv;
+};
+
+struct pm8921_rbatt_params {
+ uint16_t ocv_for_rbatt_raw;
+ uint16_t vsense_for_rbatt_raw;
+ uint16_t vbatt_for_rbatt_raw;
+
+ int ocv_for_rbatt_uv;
+ int vsense_for_rbatt_uv;
+ int vbatt_for_rbatt_uv;
+};
+
+struct pm8921_bms_chip {
+ struct device *dev;
+ struct dentry *dent;
+ unsigned int r_sense;
+ unsigned int i_test;
+ unsigned int v_failure;
+ unsigned int fcc;
+ struct single_row_lut *fcc_temp_lut;
+ struct single_row_lut *fcc_sf_lut;
+ struct pc_temp_ocv_lut *pc_temp_ocv_lut;
+ struct sf_lut *pc_sf_lut;
+ struct sf_lut *rbatt_sf_lut;
+ int delta_rbatt_mohm;
+ struct work_struct calib_hkadc_work;
+ unsigned int revision;
+ unsigned int xoadc_v0625_usb_present;
+ unsigned int xoadc_v0625_usb_absent;
+ unsigned int xoadc_v0625;
+ unsigned int xoadc_v125;
+ unsigned int batt_temp_channel;
+ unsigned int vbat_channel;
+ unsigned int ref625mv_channel;
+ unsigned int ref1p25v_channel;
+ unsigned int batt_id_channel;
+ unsigned int pmic_bms_irq[PM_BMS_MAX_INTS];
+ DECLARE_BITMAP(enabled_irqs, PM_BMS_MAX_INTS);
+ struct mutex bms_output_lock;
+ spinlock_t bms_100_lock;
+ struct single_row_lut *adjusted_fcc_temp_lut;
+ unsigned int charging_began;
+ int start_percent;
+ int end_percent;
+
+ uint16_t ocv_reading_at_100;
+ int cc_reading_at_100;
+ int max_voltage_uv;
+ int batt_temp_suspend;
+ int soc_rbatt_suspend;
+ int default_rbatt_mohm;
+ unsigned int rconn_mohm;
+ int amux_2_trim_delta;
+ uint16_t prev_last_good_ocv_raw;
+ int usb_chg_plugged_ready;
+};
+
+static struct pm8921_bms_chip *the_chip;
+
+struct pm8921_bms_debug {
+ int rbatt;
+ int rbatt_sf;
+ int voltage_unusable_uv;
+ int pc_unusable;
+ int rc_pc;
+ int scalefactor;
+ int batt_temp;
+ int soc_rbatt;
+};
+static struct pm8921_bms_debug bms_dbg;
+
+#define DEFAULT_RBATT_MOHMS 128
+#define DEFAULT_OCV_MICROVOLTS 3900000
+#define DEFAULT_CHARGE_CYCLES 0
+
+static int last_usb_cal_delta_uv = 1800;
+module_param(last_usb_cal_delta_uv, int, 0644);
+
+static int last_chargecycles = DEFAULT_CHARGE_CYCLES;
+static int last_charge_increase;
+module_param(last_chargecycles, int, 0644);
+module_param(last_charge_increase, int, 0644);
+
+static int last_rbatt = -EINVAL;
+static int last_ocv_uv = -EINVAL;
+static int last_soc = -EINVAL;
+static int last_real_fcc_mah = -EINVAL;
+static int last_real_fcc_batt_temp = -EINVAL;
+
+static int bms_ops_set(const char *val, const struct kernel_param *kp)
+{
+ if (*(int *)kp->arg == -EINVAL)
+ return param_set_int(val, kp);
+ else
+ return 0;
+}
+
+static struct kernel_param_ops bms_param_ops = {
+ .set = bms_ops_set,
+ .get = param_get_int,
+};
+
+module_param_cb(last_rbatt, &bms_param_ops, &last_rbatt, 0644);
+module_param_cb(last_ocv_uv, &bms_param_ops, &last_ocv_uv, 0644);
+module_param_cb(last_soc, &bms_param_ops, &last_soc, 0644);
+
+static int bms_fake_battery = -EINVAL;
+module_param(bms_fake_battery, int, 0644);
+
+static int bms_start_percent;
+static int bms_start_ocv_uv;
+static int bms_start_cc_uah;
+static int bms_end_percent;
+static int bms_end_ocv_uv;
+static int bms_end_cc_uah;
+static int bms_discharge_percent;
+static int is_ocv_update_start;
+
+static int bms_ro_ops_set(const char *val, const struct kernel_param *kp)
+{
+ return -EINVAL;
+}
+
+static struct kernel_param_ops bms_ro_param_ops = {
+ .set = bms_ro_ops_set,
+ .get = param_get_int,
+};
+module_param_cb(bms_start_percent, &bms_ro_param_ops, &bms_start_percent, 0644);
+module_param_cb(bms_start_ocv_uv, &bms_ro_param_ops, &bms_start_ocv_uv, 0644);
+module_param_cb(bms_start_cc_uah, &bms_ro_param_ops, &bms_start_cc_uah, 0644);
+
+module_param_cb(bms_end_percent, &bms_ro_param_ops, &bms_end_percent, 0644);
+module_param_cb(bms_end_ocv_uv, &bms_ro_param_ops, &bms_end_ocv_uv, 0644);
+module_param_cb(bms_end_cc_uah, &bms_ro_param_ops, &bms_end_cc_uah, 0644);
+
+static int dump_cc_uah(void);
+
+static int interpolate_fcc(struct pm8921_bms_chip *chip, int batt_temp);
+static void readjust_fcc_table(void)
+{
+ struct single_row_lut *temp, *old;
+ int i, fcc, ratio;
+
+ if (!the_chip->fcc_temp_lut) {
+ pr_err("The static fcc lut table is NULL\n");
+ return;
+ }
+
+ temp = kzalloc(sizeof(struct single_row_lut), GFP_KERNEL);
+ if (!temp) {
+ pr_err("Cannot allocate memory for adjusted fcc table\n");
+ return;
+ }
+
+ fcc = interpolate_fcc(the_chip, last_real_fcc_batt_temp);
+
+ temp->cols = the_chip->fcc_temp_lut->cols;
+ for (i = 0; i < the_chip->fcc_temp_lut->cols; i++) {
+ temp->x[i] = the_chip->fcc_temp_lut->x[i];
+ ratio = div_u64(the_chip->fcc_temp_lut->y[i] * 1000, fcc);
+ temp->y[i] = (ratio * last_real_fcc_mah);
+ temp->y[i] /= 1000;
+ pr_debug("temp=%d, staticfcc=%d, adjfcc=%d, ratio=%d\n",
+ temp->x[i], the_chip->fcc_temp_lut->y[i],
+ temp->y[i], ratio);
+ }
+
+ old = the_chip->adjusted_fcc_temp_lut;
+ the_chip->adjusted_fcc_temp_lut = temp;
+ kfree(old);
+}
+
+static int bms_last_real_fcc_set(const char *val,
+ const struct kernel_param *kp)
+{
+ int rc = 0;
+
+ if (last_real_fcc_mah == -EINVAL)
+ rc = param_set_int(val, kp);
+ if (rc) {
+ pr_err("Failed to set last_real_fcc_mah rc=%d\n", rc);
+ return rc;
+ }
+ if (last_real_fcc_batt_temp != -EINVAL)
+ readjust_fcc_table();
+ return rc;
+}
+static struct kernel_param_ops bms_last_real_fcc_param_ops = {
+ .set = bms_last_real_fcc_set,
+ .get = param_get_int,
+};
+module_param_cb(last_real_fcc_mah, &bms_last_real_fcc_param_ops,
+ &last_real_fcc_mah, 0644);
+
+static int bms_last_real_fcc_batt_temp_set(const char *val,
+ const struct kernel_param *kp)
+{
+ int rc = 0;
+
+ if (last_real_fcc_batt_temp == -EINVAL)
+ rc = param_set_int(val, kp);
+ if (rc) {
+ pr_err("Failed to set last_real_fcc_batt_temp rc=%d\n", rc);
+ return rc;
+ }
+ if (last_real_fcc_mah != -EINVAL)
+ readjust_fcc_table();
+ return rc;
+}
+
+static struct kernel_param_ops bms_last_real_fcc_batt_temp_param_ops = {
+ .set = bms_last_real_fcc_batt_temp_set,
+ .get = param_get_int,
+};
+module_param_cb(last_real_fcc_batt_temp, &bms_last_real_fcc_batt_temp_param_ops,
+ &last_real_fcc_batt_temp, 0644);
+
+static int pm_bms_get_rt_status(struct pm8921_bms_chip *chip, int irq_id)
+{
+ return pm8xxx_read_irq_stat(chip->dev->parent,
+ chip->pmic_bms_irq[irq_id]);
+}
+
+static void pm8921_bms_enable_irq(struct pm8921_bms_chip *chip, int interrupt)
+{
+ if (!__test_and_set_bit(interrupt, chip->enabled_irqs)) {
+ dev_dbg(chip->dev, "%s %d\n", __func__,
+ chip->pmic_bms_irq[interrupt]);
+ enable_irq(chip->pmic_bms_irq[interrupt]);
+ }
+}
+
+static void pm8921_bms_disable_irq(struct pm8921_bms_chip *chip, int interrupt)
+{
+ if (__test_and_clear_bit(interrupt, chip->enabled_irqs)) {
+ pr_debug("%d\n", chip->pmic_bms_irq[interrupt]);
+ disable_irq_nosync(chip->pmic_bms_irq[interrupt]);
+ }
+}
+
+static int pm_bms_masked_write(struct pm8921_bms_chip *chip, u16 addr,
+ u8 mask, u8 val)
+{
+ int rc;
+ u8 reg;
+
+ rc = pm8xxx_readb(chip->dev->parent, addr, ®);
+ if (rc) {
+ pr_err("read failed addr = %03X, rc = %d\n", addr, rc);
+ return rc;
+ }
+ reg &= ~mask;
+ reg |= val & mask;
+ rc = pm8xxx_writeb(chip->dev->parent, addr, reg);
+ if (rc) {
+ pr_err("write failed addr = %03X, rc = %d\n", addr, rc);
+ return rc;
+ }
+ return 0;
+}
+
+static int usb_chg_plugged_in(void)
+{
+#if 0
+ union power_supply_propval ret = {0,};
+ static struct power_supply *psy;
+ if (psy == NULL) {
+ psy = power_supply_get_by_name("usb");
+ if (psy == NULL)
+ return 0;
+ }
+
+ if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
+ return 0;
+ return ret.intval;
+#endif
+ int rc = pm8921_is_usb_chg_plugged_in();
+ if (rc < 0) {
+ return 0;
+ }
+ the_chip->usb_chg_plugged_ready = 1;
+ return rc;
+}
+
+#define HOLD_OREG_DATA BIT(1)
+static int pm_bms_lock_output_data(struct pm8921_bms_chip *chip)
+{
+ int rc;
+
+ rc = pm_bms_masked_write(chip, BMS_CONTROL, HOLD_OREG_DATA,
+ HOLD_OREG_DATA);
+ if (rc) {
+ pr_err("couldnt lock bms output rc = %d\n", rc);
+ return rc;
+ }
+ return 0;
+}
+
+static int pm_bms_unlock_output_data(struct pm8921_bms_chip *chip)
+{
+ int rc;
+
+ rc = pm_bms_masked_write(chip, BMS_CONTROL, HOLD_OREG_DATA, 0);
+ if (rc) {
+ pr_err("fail to unlock BMS_CONTROL rc = %d\n", rc);
+ return rc;
+ }
+ return 0;
+}
+
+#define SELECT_OUTPUT_DATA 0x1C
+#define SELECT_OUTPUT_TYPE_SHIFT 2
+#define OCV_FOR_RBATT 0x0
+#define VSENSE_FOR_RBATT 0x1
+#define VBATT_FOR_RBATT 0x2
+#define CC_MSB 0x3
+#define CC_LSB 0x4
+#define LAST_GOOD_OCV_VALUE 0x5
+#define VSENSE_AVG 0x6
+#define VBATT_AVG 0x7
+
+static int pm_bms_read_output_data(struct pm8921_bms_chip *chip, int type,
+ int16_t *result)
+{
+ int rc;
+ u8 reg;
+
+ if (!result) {
+ pr_err("result pointer null\n");
+ return -EINVAL;
+ }
+ *result = 0;
+ if (type < OCV_FOR_RBATT || type > VBATT_AVG) {
+ pr_err("invalid type %d asked to read\n", type);
+ return -EINVAL;
+ }
+
+ rc = pm_bms_masked_write(chip, BMS_CONTROL, SELECT_OUTPUT_DATA,
+ type << SELECT_OUTPUT_TYPE_SHIFT);
+ if (rc) {
+ pr_err("fail to select %d type in BMS_CONTROL rc = %d\n",
+ type, rc);
+ return rc;
+ }
+
+ rc = pm8xxx_readb(chip->dev->parent, BMS_OUTPUT0, ®);
+ if (rc) {
+ pr_err("fail to read BMS_OUTPUT0 for type %d rc = %d\n",
+ type, rc);
+ return rc;
+ }
+ *result = reg;
+ rc = pm8xxx_readb(chip->dev->parent, BMS_OUTPUT1, ®);
+ if (rc) {
+ pr_err("fail to read BMS_OUTPUT1 for type %d rc = %d\n",
+ type, rc);
+ return rc;
+ }
+ *result |= reg << 8;
+ pr_debug("type %d result %x", type, *result);
+ return 0;
+}
+
+#define V_PER_BIT_MUL_FACTOR 97656
+#define V_PER_BIT_DIV_FACTOR 1000
+#define XOADC_INTRINSIC_OFFSET 0x6000
+static int xoadc_reading_to_microvolt(unsigned int a)
+{
+ if (a <= XOADC_INTRINSIC_OFFSET)
+ return 0;
+
+ return (a - XOADC_INTRINSIC_OFFSET)
+ * V_PER_BIT_MUL_FACTOR / V_PER_BIT_DIV_FACTOR;
+}
+
+#define XOADC_CALIB_UV 625000
+#define VBATT_MUL_FACTOR 3
+static int adjust_xo_vbatt_reading(struct pm8921_bms_chip *chip,
+ int usb_chg, unsigned int uv)
+{
+ s64 numerator, denominator;
+ int local_delta;
+
+ if (uv == 0)
+ return 0;
+
+
+ if (chip->xoadc_v0625 == 0 || chip->xoadc_v125 == 0) {
+ pr_debug("No cal yet return %d\n", VBATT_MUL_FACTOR * uv);
+ return VBATT_MUL_FACTOR * uv;
+ }
+
+ if (usb_chg)
+ local_delta = last_usb_cal_delta_uv;
+ else
+ local_delta = 0;
+
+ pr_debug("using delta = %d\n", local_delta);
+ numerator = ((s64)uv - chip->xoadc_v0625 - local_delta)
+ * XOADC_CALIB_UV;
+ denominator = (s64)chip->xoadc_v125 - chip->xoadc_v0625 - local_delta;
+ if (denominator == 0)
+ return uv * VBATT_MUL_FACTOR;
+ return (XOADC_CALIB_UV + local_delta + div_s64(numerator, denominator))
+ * VBATT_MUL_FACTOR;
+}
+
+#define CC_RESOLUTION_N_V1 1085069
+#define CC_RESOLUTION_D_V1 100000
+#define CC_RESOLUTION_N_V2 868056
+#define CC_RESOLUTION_D_V2 10000
+
+static s64 cc_to_microvolt_v1(s64 cc)
+{
+ return div_s64(cc * CC_RESOLUTION_N_V1, CC_RESOLUTION_D_V1);
+}
+
+static s64 cc_to_microvolt_v2(s64 cc)
+{
+ return div_s64(cc * CC_RESOLUTION_N_V2, CC_RESOLUTION_D_V2);
+}
+
+static s64 cc_to_microvolt(struct pm8921_bms_chip *chip, s64 cc)
+{
+ return (chip->revision < PM8XXX_REVISION_8921_2p0) ?
+ cc_to_microvolt_v1((s64)cc) :
+ cc_to_microvolt_v2((s64)cc);
+}
+
+#define CC_READING_TICKS 56
+#define SLEEP_CLK_HZ 32764
+#define SECONDS_PER_HOUR 3600
+static s64 ccmicrovolt_to_nvh(s64 cc_uv)
+{
+ return div_s64(cc_uv * CC_READING_TICKS * 1000,
+ SLEEP_CLK_HZ * SECONDS_PER_HOUR);
+}
+
+static int read_cc(struct pm8921_bms_chip *chip, int *result)
+{
+ int rc;
+ uint16_t msw, lsw;
+
+ rc = pm_bms_read_output_data(chip, CC_LSB, &lsw);
+ if (rc) {
+ pr_err("fail to read CC_LSB rc = %d\n", rc);
+ return rc;
+ }
+ rc = pm_bms_read_output_data(chip, CC_MSB, &msw);
+ if (rc) {
+ pr_err("fail to read CC_MSB rc = %d\n", rc);
+ return rc;
+ }
+ *result = msw << 16 | lsw;
+ pr_debug("msw = %04x lsw = %04x cc = %d\n", msw, lsw, *result);
+ return 0;
+}
+
+static int adjust_xo_vbatt_reading_for_mbg(struct pm8921_bms_chip *chip,
+ int result)
+{
+ int64_t numerator;
+ int64_t denominator;
+
+ if (chip->amux_2_trim_delta == 0)
+ return result;
+
+ numerator = (s64)result * 1000000;
+ denominator = (1000000 + (410 * (s64)chip->amux_2_trim_delta));
+ return div_s64(numerator, denominator);
+}
+
+static int convert_vbatt_raw_to_uv(struct pm8921_bms_chip *chip,
+ int usb_chg,
+ uint16_t reading, int *result)
+{
+ *result = xoadc_reading_to_microvolt(reading);
+ pr_debug("raw = %04x vbatt = %u\n", reading, *result);
+ *result = adjust_xo_vbatt_reading(chip, usb_chg, *result);
+ pr_debug("after adj vbatt = %u\n", *result);
+ *result = adjust_xo_vbatt_reading_for_mbg(chip, *result);
+ pr_debug("after mbg adj vbatt = %u\n", *result);
+ return 0;
+}
+
+static int convert_vsense_to_uv(struct pm8921_bms_chip *chip,
+ int16_t reading, int *result)
+{
+ *result = pm8xxx_ccadc_reading_to_microvolt(chip->revision, reading);
+ pr_debug("raw = %04x vsense = %d\n", reading, *result);
+ *result = pm8xxx_cc_adjust_for_gain(*result);
+ pr_debug("after adj vsense = %d\n", *result);
+ return 0;
+}
+
+static int read_vsense_avg(struct pm8921_bms_chip *chip, int *result)
+{
+ int rc;
+ int16_t reading;
+
+ rc = pm_bms_read_output_data(chip, VSENSE_AVG, &reading);
+ if (rc) {
+ pr_err("fail to read VSENSE_AVG rc = %d\n", rc);
+ return rc;
+ }
+
+ convert_vsense_to_uv(chip, reading, result);
+ return 0;
+}
+
+static int linear_interpolate(int y0, int x0, int y1, int x1, int x)
+{
+ if (y0 == y1 || x == x0)
+ return y0;
+ if (x1 == x0 || x == x1)
+ return y1;
+
+ return y0 + ((y1 - y0) * (x - x0) / (x1 - x0));
+}
+
+static int interpolate_single_lut(struct single_row_lut *lut, int x)
+{
+ int i, result;
+
+ if (x < lut->x[0]) {
+ pr_debug("x %d less than known range return y = %d lut = %pS\n",
+ x, lut->y[0], lut);
+ return lut->y[0];
+ }
+ if (x > lut->x[lut->cols - 1]) {
+ pr_debug("x %d more than known range return y = %d lut = %pS\n",
+ x, lut->y[lut->cols - 1], lut);
+ return lut->y[lut->cols - 1];
+ }
+
+ for (i = 0; i < lut->cols; i++)
+ if (x <= lut->x[i])
+ break;
+ if (x == lut->x[i]) {
+ result = lut->y[i];
+ } else {
+ result = linear_interpolate(
+ lut->y[i - 1],
+ lut->x[i - 1],
+ lut->y[i],
+ lut->x[i],
+ x);
+ }
+ return result;
+}
+
+static int interpolate_fcc(struct pm8921_bms_chip *chip, int batt_temp)
+{
+
+ batt_temp = batt_temp/10;
+ return interpolate_single_lut(chip->fcc_temp_lut, batt_temp);
+}
+
+static int interpolate_fcc_adjusted(struct pm8921_bms_chip *chip, int batt_temp)
+{
+
+ batt_temp = batt_temp/10;
+ return interpolate_single_lut(chip->adjusted_fcc_temp_lut, batt_temp);
+}
+
+static int interpolate_scalingfactor_fcc(struct pm8921_bms_chip *chip,
+ int cycles)
+{
+ if (chip->fcc_sf_lut)
+ return interpolate_single_lut(chip->fcc_sf_lut, cycles);
+ else
+ return 100;
+}
+
+static int interpolate_scalingfactor(struct pm8921_bms_chip *chip,
+ struct sf_lut *sf_lut,
+ int row_entry, int pc)
+{
+ int i, scalefactorrow1, scalefactorrow2, scalefactor;
+ int rows, cols;
+ int row1 = 0;
+ int row2 = 0;
+
+ if (!sf_lut)
+ return 100;
+
+ rows = sf_lut->rows;
+ cols = sf_lut->cols;
+ if (pc > sf_lut->percent[0]) {
+ pr_debug("pc %d greater than known pc ranges for sfd\n", pc);
+ row1 = 0;
+ row2 = 0;
+ }
+ if (pc < sf_lut->percent[rows - 1]) {
+ pr_debug("pc %d less than known pc ranges for sf", pc);
+ row1 = rows - 1;
+ row2 = rows - 1;
+ }
+ for (i = 0; i < rows; i++) {
+ if (pc == sf_lut->percent[i]) {
+ row1 = i;
+ row2 = i;
+ break;
+ }
+ if (pc > sf_lut->percent[i]) {
+ row1 = i - 1;
+ row2 = i;
+ break;
+ }
+ }
+
+ if (row_entry < sf_lut->row_entries[0])
+ row_entry = sf_lut->row_entries[0];
+ if (row_entry > sf_lut->row_entries[cols - 1])
+ row_entry = sf_lut->row_entries[cols - 1];
+
+ for (i = 0; i < cols; i++)
+ if (row_entry <= sf_lut->row_entries[i])
+ break;
+ if (row_entry == sf_lut->row_entries[i]) {
+ scalefactor = linear_interpolate(
+ sf_lut->sf[row1][i],
+ sf_lut->percent[row1],
+ sf_lut->sf[row2][i],
+ sf_lut->percent[row2],
+ pc);
+ return scalefactor;
+ }
+
+ scalefactorrow1 = linear_interpolate(
+ sf_lut->sf[row1][i - 1],
+ sf_lut->row_entries[i - 1],
+ sf_lut->sf[row1][i],
+ sf_lut->row_entries[i],
+ row_entry);
+
+ scalefactorrow2 = linear_interpolate(
+ sf_lut->sf[row2][i - 1],
+ sf_lut->row_entries[i - 1],
+ sf_lut->sf[row2][i],
+ sf_lut->row_entries[i],
+ row_entry);
+
+ scalefactor = linear_interpolate(
+ scalefactorrow1,
+ sf_lut->percent[row1],
+ scalefactorrow2,
+ sf_lut->percent[row2],
+ pc);
+
+ return scalefactor;
+}
+
+static int is_between(int left, int right, int value)
+{
+ if (left >= right && left >= value && value >= right)
+ return 1;
+ if (left <= right && left <= value && value <= right)
+ return 1;
+
+ return 0;
+}
+
+static int interpolate_pc(struct pm8921_bms_chip *chip,
+ int batt_temp, int ocv)
+{
+ int i, j, pcj, pcj_minus_one, pc;
+ int rows = chip->pc_temp_ocv_lut->rows;
+ int cols = chip->pc_temp_ocv_lut->cols;
+
+
+ batt_temp = batt_temp/10;
+
+ if (batt_temp < chip->pc_temp_ocv_lut->temp[0]) {
+ pr_debug("batt_temp %d < known temp range for pc\n", batt_temp);
+ batt_temp = chip->pc_temp_ocv_lut->temp[0];
+ }
+ if (batt_temp > chip->pc_temp_ocv_lut->temp[cols - 1]) {
+ pr_debug("batt_temp %d > known temp range for pc\n", batt_temp);
+ batt_temp = chip->pc_temp_ocv_lut->temp[cols - 1];
+ }
+
+ for (j = 0; j < cols; j++)
+ if (batt_temp <= chip->pc_temp_ocv_lut->temp[j])
+ break;
+ if (batt_temp == chip->pc_temp_ocv_lut->temp[j]) {
+
+ if (ocv >= chip->pc_temp_ocv_lut->ocv[0][j])
+ return chip->pc_temp_ocv_lut->percent[0];
+ if (ocv <= chip->pc_temp_ocv_lut->ocv[rows - 1][j])
+ return chip->pc_temp_ocv_lut->percent[rows - 1];
+ for (i = 0; i < rows; i++) {
+ if (ocv >= chip->pc_temp_ocv_lut->ocv[i][j]) {
+ if (ocv == chip->pc_temp_ocv_lut->ocv[i][j])
+ return
+ chip->pc_temp_ocv_lut->percent[i];
+ pc = linear_interpolate(
+ chip->pc_temp_ocv_lut->percent[i],
+ chip->pc_temp_ocv_lut->ocv[i][j],
+ chip->pc_temp_ocv_lut->percent[i - 1],
+ chip->pc_temp_ocv_lut->ocv[i - 1][j],
+ ocv);
+ return pc;
+ }
+ }
+ }
+
+ if (ocv >= chip->pc_temp_ocv_lut->ocv[0][j])
+ return chip->pc_temp_ocv_lut->percent[0];
+ if (ocv <= chip->pc_temp_ocv_lut->ocv[rows - 1][j - 1])
+ return chip->pc_temp_ocv_lut->percent[rows - 1];
+
+ pcj_minus_one = 0;
+ pcj = 0;
+ for (i = 0; i < rows-1; i++) {
+ if (pcj == 0
+ && is_between(chip->pc_temp_ocv_lut->ocv[i][j],
+ chip->pc_temp_ocv_lut->ocv[i+1][j], ocv)) {
+ pcj = linear_interpolate(
+ chip->pc_temp_ocv_lut->percent[i],
+ chip->pc_temp_ocv_lut->ocv[i][j],
+ chip->pc_temp_ocv_lut->percent[i + 1],
+ chip->pc_temp_ocv_lut->ocv[i+1][j],
+ ocv);
+ }
+
+ if (pcj_minus_one == 0
+ && is_between(chip->pc_temp_ocv_lut->ocv[i][j-1],
+ chip->pc_temp_ocv_lut->ocv[i+1][j-1], ocv)) {
+
+ pcj_minus_one = linear_interpolate(
+ chip->pc_temp_ocv_lut->percent[i],
+ chip->pc_temp_ocv_lut->ocv[i][j-1],
+ chip->pc_temp_ocv_lut->percent[i + 1],
+ chip->pc_temp_ocv_lut->ocv[i+1][j-1],
+ ocv);
+ }
+
+ if (pcj && pcj_minus_one) {
+ pc = linear_interpolate(
+ pcj_minus_one,
+ chip->pc_temp_ocv_lut->temp[j-1],
+ pcj,
+ chip->pc_temp_ocv_lut->temp[j],
+ batt_temp);
+ return pc;
+ }
+ }
+
+ if (pcj)
+ return pcj;
+
+ if (pcj_minus_one)
+ return pcj_minus_one;
+
+ pr_debug("%d ocv wasn't found for temp %d in the LUT returning 100%%",
+ ocv, batt_temp);
+ return 100;
+}
+
+#define BMS_MODE_BIT BIT(6)
+#define EN_VBAT_BIT BIT(5)
+#define OVERRIDE_MODE_DELAY_MS 20
+int pm8921_bms_get_simultaneous_battery_voltage_and_current(int *ibat_ua,
+ int *vbat_uv)
+{
+ int16_t vsense_raw;
+ int16_t vbat_raw;
+ int vsense_uv, usb_chg;
+
+ if (the_chip == NULL) {
+ pr_err("Called to early\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&the_chip->bms_output_lock);
+
+ pm8xxx_writeb(the_chip->dev->parent, BMS_S1_DELAY, 0x00);
+ pm_bms_masked_write(the_chip, BMS_CONTROL,
+ BMS_MODE_BIT | EN_VBAT_BIT, BMS_MODE_BIT | EN_VBAT_BIT);
+
+ msleep(OVERRIDE_MODE_DELAY_MS);
+
+ pm_bms_lock_output_data(the_chip);
+ pm_bms_read_output_data(the_chip, VSENSE_AVG, &vsense_raw);
+ pm_bms_read_output_data(the_chip, VBATT_AVG, &vbat_raw);
+ pm_bms_unlock_output_data(the_chip);
+ pm_bms_masked_write(the_chip, BMS_CONTROL,
+ BMS_MODE_BIT | EN_VBAT_BIT, 0);
+
+ pm8xxx_writeb(the_chip->dev->parent, BMS_S1_DELAY, 0x0B);
+
+ mutex_unlock(&the_chip->bms_output_lock);
+
+ usb_chg = usb_chg_plugged_in();
+ convert_vbatt_raw_to_uv(the_chip, usb_chg, vbat_raw, vbat_uv);
+ convert_vsense_to_uv(the_chip, vsense_raw, &vsense_uv);
+ *ibat_ua = vsense_uv * 1000 / (int)the_chip->r_sense;
+
+ pr_debug("vsense_raw = 0x%x vbat_raw = 0x%x"
+ " ibat_ua = %d vbat_uv = %d\n",
+ (uint16_t)vsense_raw, (uint16_t)vbat_raw,
+ *ibat_ua, *vbat_uv);
+ return 0;
+}
+EXPORT_SYMBOL(pm8921_bms_get_simultaneous_battery_voltage_and_current);
+
+static int read_rbatt_params_raw(struct pm8921_bms_chip *chip,
+ struct pm8921_rbatt_params *raw)
+{
+ int usb_chg;
+
+ mutex_lock(&chip->bms_output_lock);
+ pm_bms_lock_output_data(chip);
+
+ pm_bms_read_output_data(chip,
+ OCV_FOR_RBATT, &raw->ocv_for_rbatt_raw);
+ pm_bms_read_output_data(chip,
+ VBATT_FOR_RBATT, &raw->vbatt_for_rbatt_raw);
+ pm_bms_read_output_data(chip,
+ VSENSE_FOR_RBATT, &raw->vsense_for_rbatt_raw);
+
+ pm_bms_unlock_output_data(chip);
+ mutex_unlock(&chip->bms_output_lock);
+
+ usb_chg = usb_chg_plugged_in();
+ convert_vbatt_raw_to_uv(chip, usb_chg,
+ raw->vbatt_for_rbatt_raw, &raw->vbatt_for_rbatt_uv);
+ convert_vbatt_raw_to_uv(chip, usb_chg,
+ raw->ocv_for_rbatt_raw, &raw->ocv_for_rbatt_uv);
+ convert_vsense_to_uv(chip,
+ raw->vsense_for_rbatt_raw, &raw->vsense_for_rbatt_uv);
+
+ pr_debug("vbatt_for_rbatt_raw = 0x%x, vbatt_for_rbatt= %duV\n",
+ raw->vbatt_for_rbatt_raw, raw->vbatt_for_rbatt_uv);
+ pr_debug("ocv_for_rbatt_raw = 0x%x, ocv_for_rbatt= %duV\n",
+ raw->ocv_for_rbatt_raw, raw->ocv_for_rbatt_uv);
+ pr_debug("vsense_for_rbatt_raw = 0x%x, vsense_for_rbatt= %duV\n",
+ raw->vsense_for_rbatt_raw, raw->vsense_for_rbatt_uv);
+ return 0;
+}
+
+#define MBG_TRANSIENT_ERROR_RAW 51
+static void adjust_pon_ocv_raw(struct pm8921_bms_chip *chip,
+ struct pm8921_soc_params *raw)
+{
+ if (raw->last_good_ocv_raw >= MBG_TRANSIENT_ERROR_RAW)
+ raw->last_good_ocv_raw -= MBG_TRANSIENT_ERROR_RAW;
+}
+
+static int read_soc_params_raw(struct pm8921_bms_chip *chip,
+ struct pm8921_soc_params *raw)
+{
+ int usb_chg, rc;
+ uint16_t last_good_ocv_raw_ori = 0;
+ int last_good_ocv_uv_ori_uv = 0;
+ u8 ocv_updated_flag = 0;
+
+ rc = pm8xxx_readb(chip->dev->parent, OCV_UPDATE_STORAGE, &ocv_updated_flag);
+ if (rc) {
+ pr_err("%s: failed to read addr = %d, rc=%d\n",
+ __func__, OCV_UPDATE_STORAGE, rc);
+ } else {
+ ocv_updated_flag &= OCV_UPDATE_STORAGE_USE_MASK;
+ pr_debug("%s: OCV_UPDATE_STORAGE = 0x%x\n", __func__, ocv_updated_flag);
+ }
+
+ mutex_lock(&chip->bms_output_lock);
+ pm_bms_lock_output_data(chip);
+
+ pm_bms_read_output_data(chip,
+ LAST_GOOD_OCV_VALUE, &raw->last_good_ocv_raw);
+ read_cc(chip, &raw->cc);
+
+ pm_bms_unlock_output_data(chip);
+ mutex_unlock(&chip->bms_output_lock);
+
+ usb_chg = usb_chg_plugged_in();
+ pr_debug("%s: usb_chg=%d, usb_chg_plugged_ready=%d,"
+ "prev_last_good_ocv_raw=0x%x, last_good_ocv_raw=0x%x\n",
+ __func__, usb_chg, chip->usb_chg_plugged_ready,
+ chip->prev_last_good_ocv_raw, raw->last_good_ocv_raw);
+ if (chip->prev_last_good_ocv_raw == 0) {
+ if (chip->usb_chg_plugged_ready == 1)
+ chip->prev_last_good_ocv_raw = raw->last_good_ocv_raw;
+ last_good_ocv_raw_ori = raw->last_good_ocv_raw;
+ if (!ocv_updated_flag)
+ adjust_pon_ocv_raw(chip, raw);
+ else
+ pr_info("%s: Skip adjust_pon_ocv_raw due to ocv_updated_flag=0x%x\n",
+ __func__, ocv_updated_flag);
+ convert_vbatt_raw_to_uv(chip, usb_chg,
+ raw->last_good_ocv_raw, &raw->last_good_ocv_uv);
+ convert_vbatt_raw_to_uv(chip, usb_chg,
+ last_good_ocv_raw_ori, &last_good_ocv_uv_ori_uv);
+ last_ocv_uv = raw->last_good_ocv_uv;
+ pr_info("%s: last_good_ocv_raw/ori=0x%x/0x%x, last_good_ocv_uv/ori=%duV/%duV\n",
+ __func__, raw->last_good_ocv_raw, last_good_ocv_raw_ori,
+ raw->last_good_ocv_uv, last_good_ocv_uv_ori_uv);
+ } else if (chip->prev_last_good_ocv_raw != raw->last_good_ocv_raw) {
+ chip->prev_last_good_ocv_raw = raw->last_good_ocv_raw;
+ convert_vbatt_raw_to_uv(chip, usb_chg,
+ raw->last_good_ocv_raw, &raw->last_good_ocv_uv);
+ last_ocv_uv = raw->last_good_ocv_uv;
+ pm_bms_masked_write(chip, OCV_UPDATE_STORAGE,
+ OCV_UPDATE_STORAGE_USE_MASK, 0x1);
+ rc = pm8xxx_readb(chip->dev->parent, OCV_UPDATE_STORAGE, &ocv_updated_flag);
+ if (rc) {
+ pr_err("%s: failed to read addr = %d, rc=%d\n",
+ __func__, OCV_UPDATE_STORAGE, rc);
+ } else {
+ ocv_updated_flag &= OCV_UPDATE_STORAGE_USE_MASK;
+ }
+ pr_info("%s: last_good_ocv_raw/uv=0x%x/%duV, ocv_updated_flag=0x%x\n",
+ __func__, raw->last_good_ocv_raw, raw->last_good_ocv_uv,
+ ocv_updated_flag);
+ } else {
+ raw->last_good_ocv_uv = last_ocv_uv;
+ }
+
+ pr_debug("0p625 = %duV\n", chip->xoadc_v0625);
+ pr_debug("1p25 = %duV\n", chip->xoadc_v125);
+ pr_debug("last_good_ocv_raw= 0x%x, last_good_ocv_uv= %duV\n",
+ raw->last_good_ocv_raw, raw->last_good_ocv_uv);
+ pr_debug("cc_raw= 0x%x\n", raw->cc);
+ return 0;
+}
+
+static int get_rbatt(struct pm8921_bms_chip *chip, int soc_rbatt, int batt_temp)
+{
+ int rbatt, scalefactor;
+
+ rbatt = (last_rbatt < 0) ? chip->default_rbatt_mohm : last_rbatt;
+ pr_debug("rbatt before scaling = %d\n", rbatt);
+ if (chip->rbatt_sf_lut == NULL) {
+ pr_debug("RBATT = %d\n", rbatt);
+ return rbatt;
+ }
+
+
+ batt_temp = batt_temp / 10;
+ scalefactor = interpolate_scalingfactor(chip, chip->rbatt_sf_lut,
+ batt_temp, soc_rbatt);
+ bms_dbg.rbatt_sf = scalefactor;
+ bms_dbg.soc_rbatt = soc_rbatt;
+ pr_debug("rbatt sf = %d for batt_temp = %d, soc_rbatt = %d\n",
+ scalefactor, batt_temp, soc_rbatt);
+ rbatt = (rbatt * scalefactor) / 100;
+
+ rbatt += the_chip->rconn_mohm;
+ pr_debug("adding rconn_mohm = %d rbatt = %d\n",
+ the_chip->rconn_mohm, rbatt);
+
+ if (is_between(20, 10, soc_rbatt))
+ rbatt = rbatt
+ + ((20 - soc_rbatt) * chip->delta_rbatt_mohm) / 10;
+ else
+ if (is_between(10, 0, soc_rbatt))
+ rbatt = rbatt + chip->delta_rbatt_mohm;
+
+ pr_debug("RBATT = %d\n", rbatt);
+ return rbatt;
+}
+
+static int calculate_rbatt_resume(struct pm8921_bms_chip *chip,
+ struct pm8921_rbatt_params *raw)
+{
+ unsigned int r_batt;
+
+ if (raw->ocv_for_rbatt_uv <= 0
+ || raw->ocv_for_rbatt_uv <= raw->vbatt_for_rbatt_uv
+ || raw->vsense_for_rbatt_raw <= 0) {
+ pr_debug("rbatt readings unavailable ocv = %d, vbatt = %d,"
+ "vsen = %d\n",
+ raw->ocv_for_rbatt_uv,
+ raw->vbatt_for_rbatt_uv,
+ raw->vsense_for_rbatt_raw);
+ return -EINVAL;
+ }
+ r_batt = ((raw->ocv_for_rbatt_uv - raw->vbatt_for_rbatt_uv)
+ * chip->r_sense) / raw->vsense_for_rbatt_uv;
+ pr_debug("r_batt = %umilliOhms", r_batt);
+ return r_batt;
+}
+
+static int calculate_fcc_uah(struct pm8921_bms_chip *chip, int batt_temp,
+ int chargecycles)
+{
+ int initfcc, result, scalefactor = 0;
+
+ if (chip->adjusted_fcc_temp_lut == NULL) {
+ initfcc = interpolate_fcc(chip, batt_temp);
+
+ scalefactor = interpolate_scalingfactor_fcc(chip, chargecycles);
+
+
+ result = (initfcc * scalefactor * 1000) / 100;
+ pr_debug("fcc = %d uAh\n", result);
+ return result;
+ } else {
+ return 1000 * interpolate_fcc_adjusted(chip, batt_temp);
+ }
+}
+
+static int get_battery_uvolts(struct pm8921_bms_chip *chip, int *uvolts)
+{
+ int rc;
+ struct pm8xxx_adc_chan_result result;
+
+ rc = pm8xxx_adc_read(chip->vbat_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ chip->vbat_channel, rc);
+ return rc;
+ }
+ pr_debug("mvolts phy = %lld meas = 0x%llx", result.physical,
+ result.measurement);
+ *uvolts = (int)result.physical;
+ return 0;
+}
+
+static int adc_based_ocv(struct pm8921_bms_chip *chip, int *ocv)
+{
+ int vbatt, rbatt, ibatt_ua, rc;
+
+ rc = get_battery_uvolts(chip, &vbatt);
+ if (rc) {
+ pr_err("failed to read vbatt from adc rc = %d\n", rc);
+ return rc;
+ }
+
+ rc = pm8921_bms_get_battery_current(&ibatt_ua);
+ if (rc) {
+ pr_err("failed to read batt current rc = %d\n", rc);
+ return rc;
+ }
+
+ rbatt = (last_rbatt < 0) ? chip->default_rbatt_mohm : last_rbatt;
+ *ocv = vbatt + (ibatt_ua * rbatt)/1000;
+ return 0;
+}
+
+static int calculate_pc(struct pm8921_bms_chip *chip, int ocv_uv, int batt_temp,
+ int chargecycles)
+{
+ int pc, scalefactor;
+
+ pc = interpolate_pc(chip, batt_temp, ocv_uv / 1000);
+ pr_debug("pc = %u for ocv = %dmicroVolts batt_temp = %d\n",
+ pc, ocv_uv, batt_temp);
+
+ scalefactor = interpolate_scalingfactor(chip,
+ chip->pc_sf_lut, chargecycles, pc);
+ pr_debug("scalefactor = %u batt_temp = %d\n", scalefactor, batt_temp);
+
+ bms_dbg.scalefactor = scalefactor;
+
+ pc = (pc * scalefactor) / 100;
+ return pc;
+}
+
+static void calculate_cc_uah(struct pm8921_bms_chip *chip, int cc, int *val)
+{
+ int64_t cc_voltage_uv, cc_nvh, cc_uah;
+
+ cc_voltage_uv = cc;
+ cc_voltage_uv -= chip->cc_reading_at_100;
+ pr_debug("cc = %d. after subtracting %d cc = %lld\n",
+ cc, chip->cc_reading_at_100,
+ cc_voltage_uv);
+ cc_voltage_uv = cc_to_microvolt(chip, cc_voltage_uv);
+ cc_voltage_uv = pm8xxx_cc_adjust_for_gain(cc_voltage_uv);
+ pr_debug("cc_voltage_uv = %lld microvolts\n", cc_voltage_uv);
+ cc_nvh = ccmicrovolt_to_nvh(cc_voltage_uv);
+ pr_debug("cc_nvh = %lld nano_volt_hour\n", cc_nvh);
+ cc_uah = div_s64(cc_nvh, chip->r_sense);
+ *val = cc_uah;
+}
+
+static int calculate_unusable_charge_uah(struct pm8921_bms_chip *chip,
+ int rbatt, int fcc_uah,
+ int batt_temp, int chargecycles)
+{
+ int voltage_unusable_uv, pc_unusable;
+
+
+ voltage_unusable_uv = (rbatt * chip->i_test)
+ + (chip->v_failure * 1000);
+ pc_unusable = calculate_pc(chip, voltage_unusable_uv,
+ batt_temp, chargecycles);
+ pr_debug("rbatt = %umilliOhms unusable_v =%d unusable_pc = %d\n",
+ rbatt, voltage_unusable_uv, pc_unusable);
+ bms_dbg.rbatt = rbatt;
+ bms_dbg.voltage_unusable_uv = voltage_unusable_uv;
+ bms_dbg.pc_unusable = pc_unusable;
+ return (fcc_uah * pc_unusable) / 100;
+}
+
+static int calculate_remaining_charge_uah(struct pm8921_bms_chip *chip,
+ struct pm8921_soc_params *raw,
+ int fcc_uah, int batt_temp,
+ int chargecycles)
+{
+ int ocv, pc;
+
+
+ ocv = 0;
+ if (chip->ocv_reading_at_100 != raw->last_good_ocv_raw) {
+ chip->ocv_reading_at_100 = 0;
+ chip->cc_reading_at_100 = 0;
+ ocv = raw->last_good_ocv_uv;
+ } else {
+ ocv = chip->max_voltage_uv;
+ }
+
+ if (ocv == 0) {
+ ocv = last_ocv_uv;
+ pr_debug("ocv not available using last_ocv_uv=%d\n", ocv);
+ }
+
+ pc = calculate_pc(chip, ocv, batt_temp, chargecycles);
+ bms_dbg.rc_pc = pc;
+ pr_debug("ocv = %d pc = %d\n", ocv, pc);
+ return (fcc_uah * pc) / 100;
+}
+
+static void calculate_soc_params(struct pm8921_bms_chip *chip,
+ struct pm8921_soc_params *raw,
+ int batt_temp, int chargecycles,
+ int *fcc_uah,
+ int *unusable_charge_uah,
+ int *remaining_charge_uah,
+ int *cc_uah,
+ int *rbatt)
+{
+ unsigned long flags;
+ int soc_rbatt;
+
+ *fcc_uah = calculate_fcc_uah(chip, batt_temp, chargecycles);
+ pr_debug("FCC = %uuAh batt_temp = %d, cycles = %d\n",
+ *fcc_uah, batt_temp, chargecycles);
+
+ spin_lock_irqsave(&chip->bms_100_lock, flags);
+
+ *remaining_charge_uah = calculate_remaining_charge_uah(chip, raw,
+ *fcc_uah, batt_temp, chargecycles);
+ pr_debug("RC = %uuAh\n", *remaining_charge_uah);
+
+
+ calculate_cc_uah(chip, raw->cc, cc_uah);
+ pr_debug("cc_uah = %duAh raw->cc = %x cc = %lld after subtracting %d\n",
+ *cc_uah, raw->cc,
+ (int64_t)raw->cc - chip->cc_reading_at_100,
+ chip->cc_reading_at_100);
+ spin_unlock_irqrestore(&chip->bms_100_lock, flags);
+
+ soc_rbatt = ((*remaining_charge_uah - *cc_uah) * 100) / *fcc_uah;
+ if (soc_rbatt < 0)
+ soc_rbatt = 0;
+ *rbatt = get_rbatt(chip, soc_rbatt, batt_temp);
+
+ *unusable_charge_uah = calculate_unusable_charge_uah(chip, *rbatt,
+ *fcc_uah, batt_temp, chargecycles);
+ pr_debug("UUC = %uuAh\n", *unusable_charge_uah);
+}
+
+static int calculate_real_fcc_uah(struct pm8921_bms_chip *chip,
+ struct pm8921_soc_params *raw,
+ int batt_temp, int chargecycles,
+ int *ret_fcc_uah)
+{
+ int fcc_uah, unusable_charge_uah;
+ int remaining_charge_uah;
+ int cc_uah;
+ int real_fcc_uah;
+ int rbatt;
+
+ calculate_soc_params(chip, raw, batt_temp, chargecycles,
+ &fcc_uah,
+ &unusable_charge_uah,
+ &remaining_charge_uah,
+ &cc_uah,
+ &rbatt);
+
+ real_fcc_uah = remaining_charge_uah - cc_uah;
+ *ret_fcc_uah = fcc_uah;
+ pr_debug("real_fcc = %d, RC = %d CC = %d fcc = %d\n",
+ real_fcc_uah, remaining_charge_uah, cc_uah, fcc_uah);
+ return real_fcc_uah;
+}
+static int calculate_state_of_charge(struct pm8921_bms_chip *chip,
+ struct pm8921_soc_params *raw,
+ int batt_temp, int chargecycles, int verbol)
+{
+ int remaining_usable_charge_uah, fcc_uah, unusable_charge_uah;
+ int remaining_charge_uah, soc, soc_remainder = 0;
+ int update_userspace = 1;
+ int cc_uah;
+ int rbatt;
+
+ calculate_soc_params(chip, raw, batt_temp, chargecycles,
+ &fcc_uah,
+ &unusable_charge_uah,
+ &remaining_charge_uah,
+ &cc_uah,
+ &rbatt);
+ bms_dbg.batt_temp = batt_temp;
+
+
+ remaining_usable_charge_uah = remaining_charge_uah
+ - cc_uah
+ - unusable_charge_uah;
+
+ pr_debug("RUC = %duAh\n", remaining_usable_charge_uah);
+ if (fcc_uah - unusable_charge_uah <= 0) {
+ pr_warn("FCC = %duAh, UUC = %duAh forcing soc = 0\n",
+ fcc_uah, unusable_charge_uah);
+ soc = 0;
+ } else {
+ soc = (remaining_usable_charge_uah * 100)
+ / (fcc_uah - unusable_charge_uah);
+ soc_remainder = (remaining_usable_charge_uah * 100)
+ % (fcc_uah - unusable_charge_uah);
+
+ if (soc >= 0 && soc_remainder > 0)
+ soc += 1;
+ }
+
+ if (verbol) {
+ pr_info("FCC=%d,UC=%d,RC=%d,CC=%d,RUC=%d,SOC=%d,SOC_R=%d,"
+ "start_percent=%d,end_percent=%d,"
+ "rbatt=%d,rbatt_sf=%d,batt_temp=%d,soc_rbatt=%d,last_rbatt=%d,"
+ "V_unusable_uv=%d,pc_unusable=%d,rc_pc=%d,scalefactor=%d\n",
+ fcc_uah, unusable_charge_uah, remaining_charge_uah,
+ cc_uah, remaining_usable_charge_uah, soc, soc_remainder,
+ the_chip->start_percent, the_chip->end_percent,
+ bms_dbg.rbatt, bms_dbg.rbatt_sf, bms_dbg.batt_temp,
+ bms_dbg.soc_rbatt, last_rbatt, bms_dbg.voltage_unusable_uv,
+ bms_dbg.pc_unusable, bms_dbg.rc_pc, bms_dbg.scalefactor);
+ }
+
+ if (soc > 100)
+ soc = 100;
+ pr_debug("SOC = %u%%\n", soc);
+
+ if (bms_fake_battery != -EINVAL) {
+ pr_debug("Returning Fake SOC = %d%%\n", bms_fake_battery);
+ return bms_fake_battery;
+ }
+
+ if (soc < 0) {
+ pr_err("bad rem_usb_chg = %d rem_chg %d,"
+ "cc_uah %d, unusb_chg %d\n",
+ remaining_usable_charge_uah,
+ remaining_charge_uah,
+ cc_uah, unusable_charge_uah);
+
+ pr_err("for bad rem_usb_chg last_ocv_uv = %d"
+ "chargecycles = %d, batt_temp = %d"
+ "fcc = %d soc =%d\n",
+ last_ocv_uv, chargecycles, batt_temp,
+ fcc_uah, soc);
+ update_userspace = 0;
+ soc = 0;
+ }
+
+ if (last_soc == -EINVAL || soc <= last_soc) {
+ last_soc = update_userspace ? soc : last_soc;
+ return soc;
+ }
+
+ if (the_chip->start_percent != -EINVAL) {
+ last_soc = soc;
+ } else {
+ pr_info("soc = %d reporting last_soc = %d\n", soc, last_soc);
+ soc = last_soc;
+ }
+
+
+ return soc;
+}
+
+#define MIN_DELTA_625_UV 1000
+static void calib_hkadc(struct pm8921_bms_chip *chip)
+{
+ int voltage, rc;
+ struct pm8xxx_adc_chan_result result;
+ int usb_chg;
+ int this_delta;
+
+ rc = pm8xxx_adc_read(the_chip->ref1p25v_channel, &result);
+ if (rc) {
+ pr_err("ADC failed for 1.25volts rc = %d\n", rc);
+ return;
+ }
+ voltage = xoadc_reading_to_microvolt(result.adc_code);
+
+ pr_debug("result 1.25v = 0x%x, voltage = %duV adc_meas = %lld\n",
+ result.adc_code, voltage, result.measurement);
+
+ chip->xoadc_v125 = voltage;
+
+ rc = pm8xxx_adc_read(the_chip->ref625mv_channel, &result);
+ if (rc) {
+ pr_err("ADC failed for 1.25volts rc = %d\n", rc);
+ return;
+ }
+ voltage = xoadc_reading_to_microvolt(result.adc_code);
+
+ usb_chg = usb_chg_plugged_in();
+ pr_debug("result 0.625V = 0x%x, voltage = %duV adc_meas = %lld "
+ "usb_chg = %d\n",
+ result.adc_code, voltage, result.measurement,
+ usb_chg);
+
+ if (usb_chg)
+ chip->xoadc_v0625_usb_present = voltage;
+ else
+ chip->xoadc_v0625_usb_absent = voltage;
+
+ chip->xoadc_v0625 = voltage;
+ if (chip->xoadc_v0625_usb_present && chip->xoadc_v0625_usb_absent) {
+ this_delta = chip->xoadc_v0625_usb_present
+ - chip->xoadc_v0625_usb_absent;
+ pr_debug("this_delta= %duV\n", this_delta);
+ if (this_delta > MIN_DELTA_625_UV)
+ last_usb_cal_delta_uv = this_delta;
+ pr_debug("625V_present= %d, 625V_absent= %d, delta = %duV\n",
+ chip->xoadc_v0625_usb_present,
+ chip->xoadc_v0625_usb_absent,
+ last_usb_cal_delta_uv);
+ }
+}
+
+static void calibrate_hkadc_work(struct work_struct *work)
+{
+ struct pm8921_bms_chip *chip = container_of(work,
+ struct pm8921_bms_chip, calib_hkadc_work);
+
+ calib_hkadc(chip);
+}
+
+void pm8921_bms_calibrate_hkadc(void)
+{
+ schedule_work(&the_chip->calib_hkadc_work);
+}
+
+int pm8921_bms_get_vsense_avg(int *result)
+{
+ int rc = -EINVAL;
+
+ if (the_chip) {
+ mutex_lock(&the_chip->bms_output_lock);
+ pm_bms_lock_output_data(the_chip);
+ rc = read_vsense_avg(the_chip, result);
+ pm_bms_unlock_output_data(the_chip);
+ mutex_unlock(&the_chip->bms_output_lock);
+ } else
+ pr_err("called before initialization\n");
+ return rc;
+}
+EXPORT_SYMBOL(pm8921_bms_get_vsense_avg);
+
+int pm8921_bms_get_battery_current(int *result_ua)
+{
+ int vsense;
+
+ if (!the_chip) {
+ pr_err("called before initialization\n");
+ return -EINVAL;
+ }
+ if (the_chip->r_sense == 0) {
+ pr_err("r_sense is zero\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&the_chip->bms_output_lock);
+ pm_bms_lock_output_data(the_chip);
+ read_vsense_avg(the_chip, &vsense);
+ pm_bms_unlock_output_data(the_chip);
+ mutex_unlock(&the_chip->bms_output_lock);
+ pr_debug("vsense=%duV\n", vsense);
+
+ *result_ua = vsense * 1000 / (int)the_chip->r_sense;
+ pr_debug("ibat=%duA\n", *result_ua);
+ return 0;
+}
+EXPORT_SYMBOL(pm8921_bms_get_battery_current);
+
+int pm8921_bms_get_percent_charge(void)
+{
+ int batt_temp, rc;
+ struct pm8xxx_adc_chan_result result;
+ struct pm8921_soc_params raw;
+
+ if (!the_chip) {
+ pr_err("called before initialization\n");
+ return -EINVAL;
+ }
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return rc;
+ }
+ pr_debug("batt_temp phy = %lld meas = 0x%llx", result.physical,
+ result.measurement);
+ batt_temp = (int)result.physical;
+
+ read_soc_params_raw(the_chip, &raw);
+
+ return calculate_state_of_charge(the_chip, &raw,
+ batt_temp, last_chargecycles, 0);
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_get_percent_charge);
+
+int pm8921_bms_get_rbatt(void)
+{
+ int batt_temp, rc;
+ struct pm8xxx_adc_chan_result result;
+ struct pm8921_soc_params raw;
+ int fcc_uah;
+ int unusable_charge_uah;
+ int remaining_charge_uah;
+ int cc_uah;
+ int rbatt;
+
+ if (!the_chip) {
+ pr_err("called before initialization\n");
+ return -EINVAL;
+ }
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return rc;
+ }
+ pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical,
+ result.measurement);
+ batt_temp = (int)result.physical;
+
+ read_soc_params_raw(the_chip, &raw);
+
+ calculate_soc_params(the_chip, &raw, batt_temp, last_chargecycles,
+ &fcc_uah,
+ &unusable_charge_uah,
+ &remaining_charge_uah,
+ &cc_uah,
+ &rbatt);
+ return rbatt;
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_get_rbatt);
+
+int pm8921_bms_get_fcc(void)
+{
+ int batt_temp, rc;
+ struct pm8xxx_adc_chan_result result;
+
+ if (!the_chip) {
+ pr_err("called before initialization\n");
+ return -EINVAL;
+ }
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return rc;
+ }
+ pr_debug("batt_temp phy = %lld meas = 0x%llx", result.physical,
+ result.measurement);
+ batt_temp = (int)result.physical;
+ return calculate_fcc_uah(the_chip, batt_temp, last_chargecycles);
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_get_fcc);
+
+#ifdef CONFIG_HTC_BATT_8960
+int pm8921_bms_get_batt_current(int *result)
+{
+ return pm8921_bms_get_battery_current(result);
+}
+
+int pm8921_bms_get_batt_soc(int *result)
+{
+ int batt_temp, rc;
+ struct pm8xxx_adc_chan_result temp_result;
+ struct pm8921_soc_params raw;
+
+ if (!the_chip) {
+ pr_err("called before initialization\n");
+ return -EINVAL;
+ }
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &temp_result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return rc;
+ }
+ pr_debug("batt_temp phy = %lld meas = 0x%llx", temp_result.physical,
+ temp_result.measurement);
+ batt_temp = (int)temp_result.physical;
+
+ read_soc_params_raw(the_chip, &raw);
+
+ *result = calculate_state_of_charge(the_chip, &raw,
+ batt_temp, last_chargecycles, 1);
+ if (bms_discharge_percent &&
+ ((bms_discharge_percent - *result) >= 5)) {
+ pr_info("OCV can be update due to %d - %d >= 5\n",
+ bms_discharge_percent, *result);
+ bms_discharge_percent = 0;
+ pm8921_bms_start_ocv_updates();
+ }
+
+ return 0;
+}
+
+int pm8921_bms_get_batt_cc(int *result)
+{
+ *result = dump_cc_uah();
+
+ return 0;
+}
+#endif
+
+#define IBAT_TOL_MASK 0x0F
+#define OCV_TOL 0xF0
+#define OCV_TOL_MASK 0xF0
+#define IBAT_TOL_DEFAULT 0x03
+#define IBAT_TOL_NOCHG 0x0F
+#define OCV_TOL_DEFAULT 0x20
+#define OCV_TOL_NO_OCV 0x00
+int pm8921_bms_charging_began(void)
+{
+ int batt_temp, rc = 0;
+ struct pm8xxx_adc_chan_result result;
+ struct pm8921_soc_params raw;
+
+ if (!the_chip) {
+ pr_err("called before initialization\n");
+ return -EINVAL;
+ }
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return rc;
+ }
+ pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical,
+ result.measurement);
+ batt_temp = (int)result.physical;
+
+ read_soc_params_raw(the_chip, &raw);
+
+ the_chip->start_percent = calculate_state_of_charge(the_chip, &raw,
+ batt_temp, last_chargecycles, 0);
+ bms_start_percent = the_chip->start_percent;
+ bms_start_ocv_uv = raw.last_good_ocv_uv;
+ calculate_cc_uah(the_chip, raw.cc, &bms_start_cc_uah);
+ pm_bms_masked_write(the_chip, BMS_TOLERANCES,
+ IBAT_TOL_MASK, IBAT_TOL_DEFAULT);
+ pr_info("start_percent = %d%%\n", the_chip->start_percent);
+ bms_discharge_percent = 0;
+ pm8921_bms_stop_ocv_updates();
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_charging_began);
+
+#define DELTA_FCC_PERCENT 3
+#define MIN_START_PERCENT_FOR_LEARNING (-30)
+void pm8921_bms_charging_end(int is_battery_full)
+{
+ int batt_temp, rc;
+ struct pm8xxx_adc_chan_result result;
+ struct pm8921_soc_params raw;
+
+ if (the_chip == NULL)
+ return;
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return;
+ }
+ pr_debug("batt_temp phy = %lld meas = 0x%llx\n", result.physical,
+ result.measurement);
+ batt_temp = (int)result.physical;
+
+ read_soc_params_raw(the_chip, &raw);
+
+ calculate_cc_uah(the_chip, raw.cc, &bms_end_cc_uah);
+
+ if (is_battery_full
+ && the_chip->start_percent <= MIN_START_PERCENT_FOR_LEARNING) {
+ int fcc_uah, new_fcc_uah, delta_fcc_uah;
+
+ new_fcc_uah = calculate_real_fcc_uah(the_chip, &raw,
+ batt_temp, last_chargecycles,
+ &fcc_uah);
+ delta_fcc_uah = new_fcc_uah - fcc_uah;
+ if (delta_fcc_uah < 0)
+ delta_fcc_uah = -delta_fcc_uah;
+
+ if (delta_fcc_uah * 100 > (DELTA_FCC_PERCENT * fcc_uah)) {
+
+ if (new_fcc_uah > fcc_uah)
+ new_fcc_uah
+ = (fcc_uah +
+ (DELTA_FCC_PERCENT * fcc_uah) / 100);
+ else
+ new_fcc_uah
+ = (fcc_uah -
+ (DELTA_FCC_PERCENT * fcc_uah) / 100);
+ pr_info("delta_fcc=%d > %d percent of fcc=%d"
+ "restring it to %d\n",
+ delta_fcc_uah, DELTA_FCC_PERCENT,
+ fcc_uah, new_fcc_uah);
+ }
+ last_real_fcc_mah = new_fcc_uah/1000;
+ last_real_fcc_batt_temp = batt_temp;
+ readjust_fcc_table();
+ pr_info("learnt fcc = %d batt_temp = %d\n",
+ last_real_fcc_mah, last_real_fcc_batt_temp);
+ }
+
+
+ if (is_battery_full) {
+ unsigned long flags;
+ spin_lock_irqsave(&the_chip->bms_100_lock, flags);
+ the_chip->ocv_reading_at_100 = raw.last_good_ocv_raw;
+ the_chip->cc_reading_at_100 = raw.cc;
+ spin_unlock_irqrestore(&the_chip->bms_100_lock, flags);
+ pr_debug("EOC ocv_reading = 0x%x cc = %d\n",
+ the_chip->ocv_reading_at_100,
+ the_chip->cc_reading_at_100);
+ pm8921_bms_start_ocv_updates();
+ }
+
+ the_chip->end_percent = calculate_state_of_charge(the_chip, &raw,
+ batt_temp, last_chargecycles, 0);
+
+ bms_end_percent = the_chip->end_percent;
+ if (!is_battery_full)
+ bms_discharge_percent = the_chip->end_percent;
+ else
+ bms_discharge_percent = 0;
+ bms_end_ocv_uv = raw.last_good_ocv_uv;
+
+ if (the_chip->end_percent > the_chip->start_percent) {
+ last_charge_increase +=
+ the_chip->end_percent - the_chip->start_percent;
+ if (last_charge_increase > 100) {
+ last_chargecycles++;
+ last_charge_increase = last_charge_increase % 100;
+ }
+ }
+ pr_info("end_percent = %d%% last_charge_increase = %d"
+ "last_chargecycles = %d\n",
+ the_chip->end_percent,
+ last_charge_increase,
+ last_chargecycles);
+ the_chip->start_percent = -EINVAL;
+ the_chip->end_percent = -EINVAL;
+ pm_bms_masked_write(the_chip, BMS_TOLERANCES,
+ IBAT_TOL_MASK, IBAT_TOL_NOCHG);
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_charging_end);
+
+int pm8921_bms_stop_ocv_updates(void)
+{
+ if (!the_chip) {
+ pr_err("called before init\n");
+ return -EINVAL;
+ }
+ if (!is_ocv_update_start) {
+ pr_info("ocv updates is already stopped");
+ return -EINVAL;
+ }
+ is_ocv_update_start = 0;
+ pr_info("stopping ocv updates, is_ocv_update_start=%d", is_ocv_update_start);
+ return pm_bms_masked_write(the_chip, BMS_TOLERANCES,
+ OCV_TOL_MASK, OCV_TOL_NO_OCV);
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_stop_ocv_updates);
+
+int pm8921_bms_start_ocv_updates(void)
+{
+ if (!the_chip) {
+ pr_err("called before init\n");
+ return -EINVAL;
+ }
+ if (is_ocv_update_start) {
+ pr_info("ocv updates is already started");
+ return -EINVAL;
+ }
+ is_ocv_update_start = 1;
+ pr_info("starting ocv updates, is_ocv_update_start=%d", is_ocv_update_start);
+ return pm_bms_masked_write(the_chip, BMS_TOLERANCES,
+ OCV_TOL_MASK, OCV_TOL_DEFAULT);
+}
+EXPORT_SYMBOL_GPL(pm8921_bms_start_ocv_updates);
+
+static irqreturn_t pm8921_bms_sbi_write_ok_handler(int irq, void *data)
+{
+ pr_debug("irq = %d triggered", irq);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8921_bms_cc_thr_handler(int irq, void *data)
+{
+ pr_debug("irq = %d triggered", irq);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8921_bms_vsense_thr_handler(int irq, void *data)
+{
+ pr_debug("irq = %d triggered", irq);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8921_bms_vsense_for_r_handler(int irq, void *data)
+{
+ pr_debug("irq = %d triggered", irq);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8921_bms_ocv_for_r_handler(int irq, void *data)
+{
+ struct pm8921_bms_chip *chip = data;
+
+ pr_debug("irq = %d triggered", irq);
+ schedule_work(&chip->calib_hkadc_work);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8921_bms_good_ocv_handler(int irq, void *data)
+{
+ struct pm8921_bms_chip *chip = data;
+
+ pr_debug("irq = %d triggered", irq);
+ schedule_work(&chip->calib_hkadc_work);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8921_bms_vsense_avg_handler(int irq, void *data)
+{
+ pr_debug("irq = %d triggered", irq);
+ return IRQ_HANDLED;
+}
+
+struct pm_bms_irq_init_data {
+ unsigned int irq_id;
+ char *name;
+ unsigned long flags;
+ irqreturn_t (*handler)(int, void *);
+};
+
+#define BMS_IRQ(_id, _flags, _handler) \
+{ \
+ .irq_id = _id, \
+ .name = #_id, \
+ .flags = _flags, \
+ .handler = _handler, \
+}
+
+struct pm_bms_irq_init_data bms_irq_data[] = {
+ BMS_IRQ(PM8921_BMS_SBI_WRITE_OK, IRQF_TRIGGER_RISING,
+ pm8921_bms_sbi_write_ok_handler),
+ BMS_IRQ(PM8921_BMS_CC_THR, IRQF_TRIGGER_RISING,
+ pm8921_bms_cc_thr_handler),
+ BMS_IRQ(PM8921_BMS_VSENSE_THR, IRQF_TRIGGER_RISING,
+ pm8921_bms_vsense_thr_handler),
+ BMS_IRQ(PM8921_BMS_VSENSE_FOR_R, IRQF_TRIGGER_RISING,
+ pm8921_bms_vsense_for_r_handler),
+ BMS_IRQ(PM8921_BMS_OCV_FOR_R, IRQF_TRIGGER_RISING,
+ pm8921_bms_ocv_for_r_handler),
+ BMS_IRQ(PM8921_BMS_GOOD_OCV, IRQF_TRIGGER_RISING,
+ pm8921_bms_good_ocv_handler),
+ BMS_IRQ(PM8921_BMS_VSENSE_AVG, IRQF_TRIGGER_RISING,
+ pm8921_bms_vsense_avg_handler),
+};
+
+static void free_irqs(struct pm8921_bms_chip *chip)
+{
+ int i;
+
+ for (i = 0; i < PM_BMS_MAX_INTS; i++)
+ if (chip->pmic_bms_irq[i]) {
+ free_irq(chip->pmic_bms_irq[i], NULL);
+ chip->pmic_bms_irq[i] = 0;
+ }
+}
+
+static int __devinit request_irqs(struct pm8921_bms_chip *chip,
+ struct platform_device *pdev)
+{
+ struct resource *res;
+ int ret, i;
+
+ ret = 0;
+ bitmap_fill(chip->enabled_irqs, PM_BMS_MAX_INTS);
+
+ for (i = 0; i < ARRAY_SIZE(bms_irq_data); i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+ bms_irq_data[i].name);
+ if (res == NULL) {
+ pr_err("couldn't find %s\n", bms_irq_data[i].name);
+ goto err_out;
+ }
+ ret = request_irq(res->start, bms_irq_data[i].handler,
+ bms_irq_data[i].flags,
+ bms_irq_data[i].name, chip);
+ if (ret < 0) {
+ pr_err("couldn't request %d (%s) %d\n", res->start,
+ bms_irq_data[i].name, ret);
+ goto err_out;
+ }
+ chip->pmic_bms_irq[bms_irq_data[i].irq_id] = res->start;
+ pm8921_bms_disable_irq(chip, bms_irq_data[i].irq_id);
+ }
+ return 0;
+
+err_out:
+ free_irqs(chip);
+ return -EINVAL;
+}
+
+#define EN_BMS_BIT BIT(7)
+#define EN_PON_HS_BIT BIT(0)
+static int __devinit pm8921_bms_hw_init(struct pm8921_bms_chip *chip)
+{
+ int rc;
+
+ rc = pm_bms_masked_write(chip, BMS_CONTROL,
+ EN_BMS_BIT | EN_PON_HS_BIT, EN_BMS_BIT | EN_PON_HS_BIT);
+ if (rc) {
+ pr_err("failed to enable pon and bms addr = %d %d",
+ BMS_CONTROL, rc);
+ }
+
+
+ pm_bms_masked_write(chip, BMS_TOLERANCES,
+ IBAT_TOL_MASK, IBAT_TOL_NOCHG);
+
+ is_ocv_update_start = 1;
+ pm_bms_masked_write(chip, BMS_TOLERANCES,
+ OCV_TOL_MASK, OCV_TOL_DEFAULT);
+ return 0;
+}
+
+static int bms_disabled;
+static int set_disable_bms_param(const char *val, struct kernel_param *kp)
+{
+ u8 data;
+ int rc;
+ struct pm8921_bms_chip *chip = the_chip;
+
+ rc = param_set_int(val, kp);
+
+ if (rc) {
+ pr_err("error setting value %d\n", rc);
+ return rc;
+ }
+
+ if (bms_disabled)
+ data = 0;
+ else
+ data = EN_BMS_BIT | EN_PON_HS_BIT;
+
+ pr_info("set bms_disabled =%d\n", bms_disabled);
+ rc = pm_bms_masked_write(chip, BMS_CONTROL,
+ EN_BMS_BIT | EN_PON_HS_BIT, data);
+ if (rc) {
+ pr_err("failed to enable pon and bms addr = %d %d",
+ BMS_CONTROL, rc);
+ }
+
+ return 0;
+}
+module_param_call(disabled, set_disable_bms_param, param_get_uint,
+ &bms_disabled, 0644);
+
+static void check_initial_ocv(struct pm8921_bms_chip *chip)
+{
+ int ocv_uv, rc;
+ int16_t ocv_raw;
+ int usb_chg;
+
+ ocv_uv = 0;
+ pm_bms_read_output_data(chip, LAST_GOOD_OCV_VALUE, &ocv_raw);
+ usb_chg = usb_chg_plugged_in();
+ rc = convert_vbatt_raw_to_uv(chip, usb_chg, ocv_raw, &ocv_uv);
+ if (rc || ocv_uv == 0) {
+ rc = adc_based_ocv(chip, &ocv_uv);
+ if (rc) {
+ pr_err("failed to read adc based ocv_uv rc = %d\n", rc);
+ ocv_uv = DEFAULT_OCV_MICROVOLTS;
+ }
+ last_ocv_uv = ocv_uv;
+ }
+ pr_debug("ocv_uv = %d last_ocv_uv = %d\n", ocv_uv, last_ocv_uv);
+}
+
+static int64_t read_battery_id(struct pm8921_bms_chip *chip)
+{
+ int rc;
+ struct pm8xxx_adc_chan_result result;
+
+ rc = pm8xxx_adc_read(chip->batt_id_channel, &result);
+ if (rc) {
+ pr_err("error reading batt id channel = %d, rc = %d\n",
+ chip->vbat_channel, rc);
+ return rc;
+ }
+ pr_debug("batt_id phy = %lld meas = 0x%llx\n", result.physical,
+ result.measurement);
+ return result.physical;
+}
+
+#ifdef CONFIG_HTC_BATT_8960
+#define PM8921_BMS_HTC_FAKE_BATT_ID (1)
+static int set_battery_data(struct pm8921_bms_chip *chip)
+{
+ int battery_id_mv, batt_id;
+ struct pm8921_bms_battery_data* bms_battery_data;
+
+
+
+ if (pm8xxx_get_revision(chip->dev->parent) < PM8XXX_REVISION_8921_2p0) {
+ batt_id = PM8921_BMS_HTC_FAKE_BATT_ID;
+ htc_battery_cell_set_cur_cell_by_id(batt_id);
+ } else {
+ battery_id_mv = (int)read_battery_id(chip) / 1000;
+
+ batt_id = htc_battery_cell_find_and_set_id_auto(battery_id_mv);
+ }
+
+
+ bms_battery_data = htc_battery_cell_get_cur_cell_gauge_cdata();
+
+ if (bms_battery_data) {
+ pr_info("set bms_battery_data (cell_id=%d).\n",
+ batt_id);
+ chip->fcc = bms_battery_data->fcc;
+ chip->fcc_temp_lut = bms_battery_data->fcc_temp_lut;
+ chip->fcc_sf_lut = bms_battery_data->fcc_sf_lut;
+ chip->pc_temp_ocv_lut = bms_battery_data->pc_temp_ocv_lut;
+ chip->pc_sf_lut = bms_battery_data->pc_sf_lut;
+ chip->rbatt_sf_lut = bms_battery_data->rbatt_sf_lut;
+ chip->default_rbatt_mohm
+ = bms_battery_data->default_rbatt_mohm;
+ chip->delta_rbatt_mohm
+ = bms_battery_data->delta_rbatt_mohm;
+ } else {
+ pr_err("bms_battery_data doesn't exist (id=%d)\n",
+ batt_id);
+ chip->fcc = palladium_1500_data.fcc;
+ chip->fcc_temp_lut = palladium_1500_data.fcc_temp_lut;
+ chip->fcc_sf_lut = palladium_1500_data.fcc_sf_lut;
+ chip->pc_temp_ocv_lut = palladium_1500_data.pc_temp_ocv_lut;
+ chip->pc_sf_lut = palladium_1500_data.pc_sf_lut;
+ chip->rbatt_sf_lut = palladium_1500_data.rbatt_sf_lut;
+ chip->default_rbatt_mohm
+ = palladium_1500_data.default_rbatt_mohm;
+ chip->delta_rbatt_mohm
+ = palladium_1500_data.delta_rbatt_mohm;
+ }
+ return 0;
+}
+#else
+#define PALLADIUM_ID_MIN 0x7F40
+#define PALLADIUM_ID_MAX 0x7F5A
+#define DESAY_5200_ID_MIN 0x7F7F
+#define DESAY_5200_ID_MAX 0x802F
+static int set_battery_data(struct pm8921_bms_chip *chip)
+{
+ int64_t battery_id;
+
+ battery_id = read_battery_id(chip);
+
+ if (battery_id < 0) {
+ pr_err("cannot read battery id err = %lld\n", battery_id);
+ return battery_id;
+ }
+
+ if (is_between(PALLADIUM_ID_MIN, PALLADIUM_ID_MAX, battery_id)) {
+ chip->fcc = palladium_1500_data.fcc;
+ chip->fcc_temp_lut = palladium_1500_data.fcc_temp_lut;
+ chip->fcc_sf_lut = palladium_1500_data.fcc_sf_lut;
+ chip->pc_temp_ocv_lut = palladium_1500_data.pc_temp_ocv_lut;
+ chip->pc_sf_lut = palladium_1500_data.pc_sf_lut;
+ chip->rbatt_sf_lut = palladium_1500_data.rbatt_sf_lut;
+ chip->default_rbatt_mohm
+ = palladium_1500_data.default_rbatt_mohm;
+ chip->delta_rbatt_mohm
+ = palladium_1500_data.delta_rbatt_mohm;
+ return 0;
+ } else if (is_between(DESAY_5200_ID_MIN, DESAY_5200_ID_MAX,
+ battery_id)) {
+ chip->fcc = desay_5200_data.fcc;
+ chip->fcc_temp_lut = desay_5200_data.fcc_temp_lut;
+ chip->fcc_sf_lut = desay_5200_data.fcc_sf_lut;
+ chip->pc_temp_ocv_lut = desay_5200_data.pc_temp_ocv_lut;
+ chip->pc_sf_lut = desay_5200_data.pc_sf_lut;
+ chip->rbatt_sf_lut = desay_5200_data.rbatt_sf_lut;
+ chip->default_rbatt_mohm = desay_5200_data.default_rbatt_mohm;
+ chip->delta_rbatt_mohm = desay_5200_data.delta_rbatt_mohm;
+ return 0;
+ } else {
+ pr_warn("invalid battery id, palladium 1500 assumed batt_id %llx\n",
+ battery_id);
+ chip->fcc = palladium_1500_data.fcc;
+ chip->fcc_temp_lut = palladium_1500_data.fcc_temp_lut;
+ chip->fcc_sf_lut = palladium_1500_data.fcc_sf_lut;
+ chip->pc_temp_ocv_lut = palladium_1500_data.pc_temp_ocv_lut;
+ chip->pc_sf_lut = palladium_1500_data.pc_sf_lut;
+ chip->rbatt_sf_lut = palladium_1500_data.rbatt_sf_lut;
+ chip->default_rbatt_mohm
+ = palladium_1500_data.default_rbatt_mohm;
+ chip->delta_rbatt_mohm
+ = palladium_1500_data.delta_rbatt_mohm;
+ return 0;
+ }
+}
+#endif
+
+enum bms_request_operation {
+ CALC_RBATT,
+ CALC_FCC,
+ CALC_PC,
+ CALC_SOC,
+ CALIB_HKADC,
+ CALIB_CCADC,
+ STOP_OCV,
+ START_OCV,
+ GET_VBAT_VSENSE_SIMULTANEOUS,
+};
+
+static int test_batt_temp = 5;
+static int test_chargecycle = 150;
+static int test_ocv = 3900000;
+enum {
+ TEST_BATT_TEMP,
+ TEST_CHARGE_CYCLE,
+ TEST_OCV,
+};
+static int get_test_param(void *data, u64 * val)
+{
+ switch ((int)data) {
+ case TEST_BATT_TEMP:
+ *val = test_batt_temp;
+ break;
+ case TEST_CHARGE_CYCLE:
+ *val = test_chargecycle;
+ break;
+ case TEST_OCV:
+ *val = test_ocv;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+static int set_test_param(void *data, u64 val)
+{
+ switch ((int)data) {
+ case TEST_BATT_TEMP:
+ test_batt_temp = (int)val;
+ break;
+ case TEST_CHARGE_CYCLE:
+ test_chargecycle = (int)val;
+ break;
+ case TEST_OCV:
+ test_ocv = (int)val;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(temp_fops, get_test_param, set_test_param, "%llu\n");
+
+static int get_calc(void *data, u64 * val)
+{
+ int param = (int)data;
+ int ret = 0;
+ int ibat_ua, vbat_uv;
+ struct pm8921_soc_params raw;
+ struct pm8921_rbatt_params rraw;
+
+ read_soc_params_raw(the_chip, &raw);
+ read_rbatt_params_raw(the_chip, &rraw);
+
+ *val = 0;
+
+
+ switch (param) {
+ case CALC_RBATT:
+ *val = calculate_rbatt_resume(the_chip, &rraw);
+ break;
+ case CALC_FCC:
+ *val = calculate_fcc_uah(the_chip, test_batt_temp,
+ test_chargecycle);
+ break;
+ case CALC_PC:
+ *val = calculate_pc(the_chip, test_ocv, test_batt_temp,
+ test_chargecycle);
+ break;
+ case CALC_SOC:
+ *val = calculate_state_of_charge(the_chip, &raw,
+ test_batt_temp, test_chargecycle, 0);
+ break;
+ case CALIB_HKADC:
+
+ *val = 0;
+ calib_hkadc(the_chip);
+ break;
+ case CALIB_CCADC:
+
+ *val = 0;
+ pm8xxx_calib_ccadc();
+ break;
+ case GET_VBAT_VSENSE_SIMULTANEOUS:
+
+ *val =
+ pm8921_bms_get_simultaneous_battery_voltage_and_current(
+ &ibat_ua,
+ &vbat_uv);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static int set_calc(void *data, u64 val)
+{
+ int param = (int)data;
+ int ret = 0;
+
+ switch (param) {
+ case STOP_OCV:
+ pm8921_bms_stop_ocv_updates();
+ break;
+ case START_OCV:
+ pm8921_bms_start_ocv_updates();
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(calc_fops, get_calc, set_calc, "%llu\n");
+
+static int get_reading(void *data, u64 * val)
+{
+ int param = (int)data;
+ int ret = 0;
+ struct pm8921_soc_params raw;
+ struct pm8921_rbatt_params rraw;
+
+ read_soc_params_raw(the_chip, &raw);
+ read_rbatt_params_raw(the_chip, &rraw);
+
+ *val = 0;
+
+ switch (param) {
+ case CC_MSB:
+ case CC_LSB:
+ *val = raw.cc;
+ break;
+ case LAST_GOOD_OCV_VALUE:
+ *val = raw.last_good_ocv_uv;
+ break;
+ case VBATT_FOR_RBATT:
+ *val = rraw.vbatt_for_rbatt_uv;
+ break;
+ case VSENSE_FOR_RBATT:
+ *val = rraw.vsense_for_rbatt_uv;
+ break;
+ case OCV_FOR_RBATT:
+ *val = rraw.ocv_for_rbatt_uv;
+ break;
+ case VSENSE_AVG:
+ read_vsense_avg(the_chip, (uint *)val);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(reading_fops, get_reading, NULL, "%lld\n");
+
+static int get_rt_status(void *data, u64 * val)
+{
+ int i = (int)data;
+ int ret;
+
+
+ ret = pm_bms_get_rt_status(the_chip, i);
+ *val = ret;
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(rt_fops, get_rt_status, NULL, "%llu\n");
+
+static int get_reg(void *data, u64 * val)
+{
+ int addr = (int)data;
+ int ret;
+ u8 temp;
+
+ ret = pm8xxx_readb(the_chip->dev->parent, addr, &temp);
+ if (ret) {
+ pr_err("pm8xxx_readb to %x value = %d errored = %d\n",
+ addr, temp, ret);
+ return -EAGAIN;
+ }
+ *val = temp;
+ return 0;
+}
+
+static int set_reg(void *data, u64 val)
+{
+ int addr = (int)data;
+ int ret;
+ u8 temp;
+
+ temp = (u8) val;
+ ret = pm8xxx_writeb(the_chip->dev->parent, addr, temp);
+ if (ret) {
+ pr_err("pm8xxx_writeb to %x value = %d errored = %d\n",
+ addr, temp, ret);
+ return -EAGAIN;
+ }
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(reg_fops, get_reg, set_reg, "0x%02llx\n");
+
+static void dump_all(void)
+{
+ u64 val;
+
+ get_reg((void *)BMS_CONTROL, &val);
+ pr_info("BMS_CONTROL = 0x%02llx\n", val);
+ get_reg((void *)BMS_OUTPUT0, &val);
+ pr_info("BMS_OUTPUT0 = 0x%02llx\n", val);
+ get_reg((void *)BMS_OUTPUT1, &val);
+ pr_info("BMS_OUTPUT1 = 0x%02llx\n", val);
+ get_reg((void *)BMS_TOLERANCES, &val);
+ pr_info("BMS_TOLERANCES = 0x%02llx\n", val);
+ get_reg((void *)BMS_TEST1, &val);
+ pr_info("BMS_TEST1 = 0x%02llx\n", val);
+ get_reg((void *)OCV_UPDATE_STORAGE, &val);
+ pr_info("OCV_UPDATE_STORAGE = 0x%02llx\n", val);
+
+
+ get_reading((void *)CC_MSB, &val);
+ pr_info("read_cc = 0x%lld\n", val);
+ get_reading((void *)LAST_GOOD_OCV_VALUE, &val);
+ pr_info("last_good_ocv = 0x%lld\n", val);
+ get_reading((void *)VBATT_FOR_RBATT, &val);
+ pr_info("vbatt_for_rbatt = 0x%lld\n", val);
+ get_reading((void *)VSENSE_FOR_RBATT, &val);
+ pr_info("vsense_for_rbatt = 0x%lld\n", val);
+ get_reading((void *)OCV_FOR_RBATT, &val);
+ pr_info("ocv_for_rbatt = 0x%lld\n", val);
+ get_reading((void *)VSENSE_AVG, &val);
+ pr_info("vsense_avg = 0x%lld\n", val);
+
+
+ pr_info("BMS irq: %d%d%d%d%d%d%d\n",
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_SBI_WRITE_OK),
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_CC_THR),
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_VSENSE_THR),
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_VSENSE_FOR_R),
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_OCV_FOR_R),
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_GOOD_OCV),
+ pm_bms_get_rt_status(the_chip, PM8921_BMS_VSENSE_AVG));
+
+ pm8xxx_ccadc_dump_all();
+}
+
+inline int pm8921_bms_dump_all(void)
+{
+ if (!the_chip) {
+ pr_err("called before init\n");
+ return -EINVAL;
+ }
+ dump_all();
+ return 0;
+}
+EXPORT_SYMBOL(pm8921_bms_dump_all);
+
+int pm8921_bms_get_attr_text(char *buf, int size)
+{
+ struct pm8921_soc_params raw;
+ struct pm8921_rbatt_params rraw;
+ unsigned long flags;
+ int len = 0;
+ u64 val = 0;
+ int cc_uah, fcc_uah, unusable_charge_uah, remaining_charge_uah;
+ int chargecycles;
+ int soc_rbatt, rbatt;
+ int batt_temp, rc;
+ struct pm8xxx_adc_chan_result result;
+
+ if (!the_chip) {
+ pr_err("driver not initialized\n");
+ return 0;
+ }
+
+ get_reg((void *)BMS_CONTROL, &val);
+ len += scnprintf(buf + len, size - len,
+ "BMS_CONTROL: 0x%02llx;\n", val);
+ get_reg((void *)BMS_OUTPUT0, &val);
+ len += scnprintf(buf + len, size - len,
+ "BMS_OUTPUT0: 0x%02llx;\n", val);
+ get_reg((void *)BMS_OUTPUT1, &val);
+ len += scnprintf(buf + len, size - len,
+ "BMS_OUTPUT1: 0x%02llx;\n", val);
+ get_reg((void *)BMS_TOLERANCES, &val);
+ len += scnprintf(buf + len, size - len,
+ "BMS_TOLERANCES: 0x%02llx;\n", val);
+ get_reg((void *)BMS_TEST1, &val);
+ len += scnprintf(buf + len, size - len,
+ "BMS_TEST1: 0x%02llx;\n", val);
+ get_reg((void *)OCV_UPDATE_STORAGE, &val);
+ len += scnprintf(buf + len, size - len,
+ "OCV_UPDATE_STORAGE: 0x%02llx;\n", val);
+
+ len += scnprintf(buf + len, size - len,
+ "bms_discharge_soc: %d;\n", bms_discharge_percent);
+ len += scnprintf(buf + len, size - len,
+ "is_ocv_update_start: %d;\n", is_ocv_update_start);
+
+ read_soc_params_raw(the_chip, &raw);
+ read_rbatt_params_raw(the_chip, &rraw);
+
+ len += scnprintf(buf + len, size - len,
+ "OCV_FOR_RBATT_RAW: 0x%x;\n", rraw.ocv_for_rbatt_raw);
+ len += scnprintf(buf + len, size - len,
+ "VBATT_FOR_RBATT_RAW: 0x%x;\n", rraw.vbatt_for_rbatt_raw);
+ len += scnprintf(buf + len, size - len,
+ "VSENSE_FOR_RBATT_RAW: 0x%x;\n", rraw.vsense_for_rbatt_raw);
+ len += scnprintf(buf + len, size - len,
+ "LAST_GOOD_OCV_RAW: 0x%x;\n", raw.last_good_ocv_raw);
+ len += scnprintf(buf + len, size - len,
+ "CC_RAW: 0x%x;\n", raw.cc);
+
+ len += scnprintf(buf + len, size - len,
+ "ocv_for_rbatt_uv: %d;\n", rraw.ocv_for_rbatt_uv);
+ len += scnprintf(buf + len, size - len,
+ "vbatt_for_rbatt_uv: %d;\n", rraw.vbatt_for_rbatt_uv);
+ len += scnprintf(buf + len, size - len,
+ "vsense_for_rbatt_uv: %d;\n", rraw.vsense_for_rbatt_uv);
+ len += scnprintf(buf + len, size - len,
+ "last_good_ocv_uv: %d;\n", raw.last_good_ocv_uv);
+
+ rc = pm8xxx_adc_read(the_chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ the_chip->batt_temp_channel, rc);
+ return len;
+ }
+ batt_temp = (int)result.physical;
+ chargecycles = last_chargecycles;
+ fcc_uah = calculate_fcc_uah(the_chip, batt_temp, chargecycles);
+ remaining_charge_uah = calculate_remaining_charge_uah(the_chip, &raw,
+ fcc_uah, batt_temp, chargecycles);
+ spin_lock_irqsave(&the_chip->bms_100_lock, flags);
+ calculate_cc_uah(the_chip, raw.cc, &cc_uah);
+ spin_unlock_irqrestore(&the_chip->bms_100_lock, flags);
+ soc_rbatt = ((remaining_charge_uah - cc_uah) * 100) / fcc_uah;
+ if (soc_rbatt < 0)
+ soc_rbatt = 0;
+ rbatt = get_rbatt(the_chip, soc_rbatt, batt_temp);
+ unusable_charge_uah = calculate_unusable_charge_uah(the_chip, rbatt,
+ fcc_uah, batt_temp, chargecycles);
+ len += scnprintf(buf + len, size - len,
+ "rbatt(milliOhms): %d;\n", bms_dbg.rbatt);
+ len += scnprintf(buf + len, size - len,
+ "rbatt_scalefactor: %d;\n", bms_dbg.rbatt_sf);
+ len += scnprintf(buf + len, size - len,
+ "soc_rbatt(%%): %d;\n", bms_dbg.soc_rbatt);
+ len += scnprintf(buf + len, size - len,
+ "last_rbatt(%%): %d;\n", last_rbatt);
+ len += scnprintf(buf + len, size - len,
+ "voltage_unusable_uv(uV): %d;\n", bms_dbg.voltage_unusable_uv);
+ len += scnprintf(buf + len, size - len,
+ "pc_unusable(%%): %d;\n", bms_dbg.pc_unusable);
+ len += scnprintf(buf + len, size - len,
+ "rc_pc(%%): %d;\n", bms_dbg.rc_pc);
+ len += scnprintf(buf + len, size - len,
+ "scalefactor(): %d;\n", bms_dbg.scalefactor);
+ len += scnprintf(buf + len, size - len,
+ "fcc(uAh): %d;\n", fcc_uah);
+ len += scnprintf(buf + len, size - len,
+ "unusable_charge(uAh): %d;\n", unusable_charge_uah);
+ len += scnprintf(buf + len, size - len,
+ "remaining_charge(uAh): %d;\n", remaining_charge_uah);
+ len += scnprintf(buf + len, size - len,
+ "cc(uAh): %d;\n", cc_uah);
+ len += scnprintf(buf + len, size - len,
+ "chargecycles: %d;\n", chargecycles);
+ len += scnprintf(buf + len, size - len,
+ "start_percent: %d;\n", the_chip->start_percent);
+ len += scnprintf(buf + len, size - len,
+ "end_percent: %d;\n", the_chip->end_percent);
+
+
+ len += pm8xxx_ccadc_get_attr_text(buf + len, size - len);
+
+ return len;
+}
+EXPORT_SYMBOL(pm8921_bms_get_attr_text);
+
+static void create_debugfs_entries(struct pm8921_bms_chip *chip)
+{
+ int i;
+
+ chip->dent = debugfs_create_dir("pm8921-bms", NULL);
+
+ if (IS_ERR(chip->dent)) {
+ pr_err("pmic bms couldnt create debugfs dir\n");
+ return;
+ }
+
+ debugfs_create_file("BMS_CONTROL", 0644, chip->dent,
+ (void *)BMS_CONTROL, ®_fops);
+ debugfs_create_file("BMS_OUTPUT0", 0644, chip->dent,
+ (void *)BMS_OUTPUT0, ®_fops);
+ debugfs_create_file("BMS_OUTPUT1", 0644, chip->dent,
+ (void *)BMS_OUTPUT1, ®_fops);
+ debugfs_create_file("BMS_TEST1", 0644, chip->dent,
+ (void *)BMS_TEST1, ®_fops);
+
+ debugfs_create_file("test_batt_temp", 0644, chip->dent,
+ (void *)TEST_BATT_TEMP, &temp_fops);
+ debugfs_create_file("test_chargecycle", 0644, chip->dent,
+ (void *)TEST_CHARGE_CYCLE, &temp_fops);
+ debugfs_create_file("test_ocv", 0644, chip->dent,
+ (void *)TEST_OCV, &temp_fops);
+
+ debugfs_create_file("read_cc", 0644, chip->dent,
+ (void *)CC_MSB, &reading_fops);
+ debugfs_create_file("read_last_good_ocv", 0644, chip->dent,
+ (void *)LAST_GOOD_OCV_VALUE, &reading_fops);
+ debugfs_create_file("read_vbatt_for_rbatt", 0644, chip->dent,
+ (void *)VBATT_FOR_RBATT, &reading_fops);
+ debugfs_create_file("read_vsense_for_rbatt", 0644, chip->dent,
+ (void *)VSENSE_FOR_RBATT, &reading_fops);
+ debugfs_create_file("read_ocv_for_rbatt", 0644, chip->dent,
+ (void *)OCV_FOR_RBATT, &reading_fops);
+ debugfs_create_file("read_vsense_avg", 0644, chip->dent,
+ (void *)VSENSE_AVG, &reading_fops);
+
+ debugfs_create_file("show_rbatt", 0644, chip->dent,
+ (void *)CALC_RBATT, &calc_fops);
+ debugfs_create_file("show_fcc", 0644, chip->dent,
+ (void *)CALC_FCC, &calc_fops);
+ debugfs_create_file("show_pc", 0644, chip->dent,
+ (void *)CALC_PC, &calc_fops);
+ debugfs_create_file("show_soc", 0644, chip->dent,
+ (void *)CALC_SOC, &calc_fops);
+ debugfs_create_file("calib_hkadc", 0644, chip->dent,
+ (void *)CALIB_HKADC, &calc_fops);
+ debugfs_create_file("calib_ccadc", 0644, chip->dent,
+ (void *)CALIB_CCADC, &calc_fops);
+ debugfs_create_file("stop_ocv", 0644, chip->dent,
+ (void *)STOP_OCV, &calc_fops);
+ debugfs_create_file("start_ocv", 0644, chip->dent,
+ (void *)START_OCV, &calc_fops);
+
+ debugfs_create_file("simultaneous", 0644, chip->dent,
+ (void *)GET_VBAT_VSENSE_SIMULTANEOUS, &calc_fops);
+
+ for (i = 0; i < ARRAY_SIZE(bms_irq_data); i++) {
+ if (chip->pmic_bms_irq[bms_irq_data[i].irq_id])
+ debugfs_create_file(bms_irq_data[i].name, 0444,
+ chip->dent,
+ (void *)bms_irq_data[i].irq_id,
+ &rt_fops);
+ }
+}
+
+static int dump_cc_uah(void)
+{
+ unsigned long flags;
+ struct pm8921_soc_params raw;
+ int cc_uah;
+
+ if (!the_chip) {
+ pr_err("driver not initialized\n");
+ return 0;
+ }
+ read_soc_params_raw(the_chip, &raw);
+
+ spin_lock_irqsave(&the_chip->bms_100_lock, flags);
+
+ calculate_cc_uah(the_chip, raw.cc, &cc_uah);
+ pr_info("cc_uah = %duAh, raw->cc = %x,"
+ " cc = %lld after subtracting %d\n",
+ cc_uah, raw.cc,
+ (int64_t)raw.cc - the_chip->cc_reading_at_100,
+ the_chip->cc_reading_at_100);
+ spin_unlock_irqrestore(&the_chip->bms_100_lock, flags);
+ return cc_uah;
+}
+
+int prev_cc_uah = 0;
+static int pm8921_bms_suspend(struct device *dev)
+{
+ u64 val;
+ int rc;
+ struct pm8xxx_adc_chan_result result;
+ struct pm8921_bms_chip *chip = dev_get_drvdata(dev);
+ struct pm8921_soc_params raw;
+ int fcc_uah;
+ int remaining_charge_uah;
+ int cc_uah;
+
+ chip->batt_temp_suspend = 0;
+ rc = pm8xxx_adc_read(chip->batt_temp_channel, &result);
+ if (rc) {
+ pr_err("error reading adc channel = %d, rc = %d\n",
+ chip->batt_temp_channel, rc);
+ }
+ chip->batt_temp_suspend = (int)result.physical;
+ read_soc_params_raw(chip, &raw);
+
+ fcc_uah = calculate_fcc_uah(chip,
+ chip->batt_temp_suspend, last_chargecycles);
+ pr_debug("FCC = %uuAh batt_temp = %d, cycles = %d\n",
+ fcc_uah, chip->batt_temp_suspend, last_chargecycles);
+
+ remaining_charge_uah = calculate_remaining_charge_uah(chip, &raw,
+ fcc_uah, chip->batt_temp_suspend,
+ last_chargecycles);
+ pr_debug("RC = %uuAh\n", remaining_charge_uah);
+
+
+ calculate_cc_uah(chip, raw.cc, &cc_uah);
+ pr_debug("cc_uah = %duAh raw->cc = %x cc = %lld after subtracting %d\n",
+ cc_uah, raw.cc,
+ (int64_t)raw.cc - chip->cc_reading_at_100,
+ chip->cc_reading_at_100);
+ chip->soc_rbatt_suspend = ((remaining_charge_uah - cc_uah) * 100)
+ / fcc_uah;
+
+ dump_cc_uah();
+ get_reg((void *)BMS_TOLERANCES, &val);
+ pr_info("BMS_TOLERANCES = 0x%02llx\n", val);
+ return 0;
+}
+
+#define DELTA_RBATT_PERCENT 10
+static int pm8921_bms_resume(struct device *dev)
+{
+ u64 val;
+ struct pm8921_rbatt_params raw;
+ struct pm8921_bms_chip *chip = dev_get_drvdata(dev);
+ int rbatt;
+ int expected_rbatt;
+ int scalefactor;
+ int delta_rbatt;
+
+ read_rbatt_params_raw(chip, &raw);
+ rbatt = calculate_rbatt_resume(chip, &raw);
+
+ if (rbatt < 0)
+ return 0;
+
+ expected_rbatt
+ = (last_rbatt < 0) ? chip->default_rbatt_mohm : last_rbatt;
+
+ if (chip->rbatt_sf_lut) {
+ scalefactor = interpolate_scalingfactor(chip,
+ chip->rbatt_sf_lut,
+ chip->batt_temp_suspend / 10,
+ chip->soc_rbatt_suspend);
+ rbatt = rbatt * 100 / scalefactor;
+ }
+
+ delta_rbatt = expected_rbatt - rbatt;
+ if (delta_rbatt)
+ delta_rbatt = -delta_rbatt;
+ if (delta_rbatt * 100 <= DELTA_RBATT_PERCENT * expected_rbatt)
+ last_rbatt = rbatt;
+
+ dump_cc_uah();
+ get_reg((void *)BMS_TOLERANCES, &val);
+ pr_info("last_rbatt:%d , BMS_TOLERANCES = 0x%02llx\n", last_rbatt, val);
+ return 0;
+}
+
+static const struct dev_pm_ops pm8921_bms_pm_ops = {
+ .suspend = pm8921_bms_suspend,
+ .resume = pm8921_bms_resume,
+};
+
+#define REG_SBI_CONFIG 0x04F
+#define PAGE3_ENABLE_MASK 0x6
+#define PROGRAM_REV_MASK 0x0F
+#define PROGRAM_REV 0x9
+static int read_ocv_trim(struct pm8921_bms_chip *chip)
+{
+ int rc;
+ u8 reg, sbi_config;
+
+ rc = pm8xxx_readb(chip->dev->parent, REG_SBI_CONFIG, &sbi_config);
+ if (rc) {
+ pr_err("error = %d reading sbi config reg\n", rc);
+ return rc;
+ }
+
+ reg = sbi_config | PAGE3_ENABLE_MASK;
+ rc = pm8xxx_writeb(chip->dev->parent, REG_SBI_CONFIG, reg);
+ if (rc) {
+ pr_err("error = %d writing sbi config reg\n", rc);
+ return rc;
+ }
+
+ rc = pm8xxx_readb(chip->dev->parent, TEST_PROGRAM_REV, ®);
+ if (rc)
+ pr_err("Error %d reading %d addr %d\n",
+ rc, reg, TEST_PROGRAM_REV);
+ pr_info("program rev reg is 0x%x\n", reg);
+ reg &= PROGRAM_REV_MASK;
+
+
+ if (reg >= PROGRAM_REV) {
+ chip->amux_2_trim_delta = 0;
+ goto restore_sbi_config;
+ }
+
+ rc = pm8xxx_readb(chip->dev->parent, AMUX_TRIM_2, ®);
+ if (rc) {
+ pr_err("error = %d reading trim reg\n", rc);
+ return rc;
+ }
+
+ chip->amux_2_trim_delta = abs(0x49 - reg);
+ pr_info("trim reg=0x%x, trim delta=%d\n", reg, chip->amux_2_trim_delta);
+
+restore_sbi_config:
+ rc = pm8xxx_writeb(chip->dev->parent, REG_SBI_CONFIG, sbi_config);
+ if (rc) {
+ pr_err("error = %d writing sbi config reg\n", rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int __devinit pm8921_bms_probe(struct platform_device *pdev)
+{
+ int rc = 0;
+ int vbatt;
+ struct pm8921_bms_chip *chip;
+ const struct pm8921_bms_platform_data *pdata
+ = pdev->dev.platform_data;
+#ifdef CONFIG_HTC_BATT_8960
+ const struct pm8921_charger_batt_param *chg_batt_param;
+#endif
+
+ pr_info("%s\n", __func__);
+
+ if (!pdata) {
+ pr_err("missing platform data\n");
+ return -EINVAL;
+ }
+
+ chip = kzalloc(sizeof(struct pm8921_bms_chip), GFP_KERNEL);
+ if (!chip) {
+ pr_err("Cannot allocate pm_bms_chip\n");
+ return -ENOMEM;
+ }
+ mutex_init(&chip->bms_output_lock);
+ spin_lock_init(&chip->bms_100_lock);
+ chip->dev = &pdev->dev;
+ chip->r_sense = pdata->r_sense;
+ chip->i_test = pdata->i_test;
+ chip->v_failure = pdata->v_failure;
+ chip->rconn_mohm = pdata->rconn_mohm;
+ chip->start_percent = -EINVAL;
+ chip->end_percent = -EINVAL;
+
+ chip->batt_temp_channel = pdata->bms_cdata.batt_temp_channel;
+ chip->vbat_channel = pdata->bms_cdata.vbat_channel;
+ chip->ref625mv_channel = pdata->bms_cdata.ref625mv_channel;
+ chip->ref1p25v_channel = pdata->bms_cdata.ref1p25v_channel;
+ chip->batt_id_channel = pdata->bms_cdata.batt_id_channel;
+ chip->revision = pm8xxx_get_revision(chip->dev->parent);
+ INIT_WORK(&chip->calib_hkadc_work, calibrate_hkadc_work);
+
+ rc = set_battery_data(chip);
+ if (rc) {
+ pr_err("%s bad battery data %d\n", __func__, rc);
+ goto free_chip;
+ }
+#ifdef CONFIG_HTC_BATT_8960
+
+ chg_batt_param = htc_battery_cell_get_cur_cell_charger_cdata();
+ if (!chg_batt_param) {
+ chip->max_voltage_uv = pdata->max_voltage_uv;
+ } else {
+ chip->max_voltage_uv = chg_batt_param->max_voltage * 1000;
+ }
+#else
+ chip->max_voltage_uv = pdata->max_voltage_uv;
+#endif
+
+ if (chip->pc_temp_ocv_lut == NULL) {
+ pr_err("temp ocv lut table is NULL\n");
+ rc = -EINVAL;
+ goto free_chip;
+ }
+
+
+ if (chip->default_rbatt_mohm <= 0)
+ chip->default_rbatt_mohm = DEFAULT_RBATT_MOHMS;
+
+
+ rc = request_irqs(chip, pdev);
+ if (rc) {
+ pr_err("couldn't register interrupts rc = %d\n", rc);
+ goto free_chip;
+ }
+
+ rc = pm8921_bms_hw_init(chip);
+ if (rc) {
+ pr_err("couldn't init hardware rc = %d\n", rc);
+ goto free_irqs;
+ }
+
+ platform_set_drvdata(pdev, chip);
+ the_chip = chip;
+ create_debugfs_entries(chip);
+
+ rc = read_ocv_trim(chip);
+ if (rc) {
+ pr_err("couldn't adjust ocv_trim rc= %d\n", rc);
+ goto free_irqs;
+ }
+ check_initial_ocv(chip);
+
+
+ schedule_work(&chip->calib_hkadc_work);
+
+ pm8921_bms_enable_irq(chip, PM8921_BMS_GOOD_OCV);
+ pm8921_bms_enable_irq(chip, PM8921_BMS_OCV_FOR_R);
+
+ get_battery_uvolts(chip, &vbatt);
+ pr_info("OK battery_capacity_at_boot=%d volt = %d ocv = %d\n",
+ pm8921_bms_get_percent_charge(),
+ vbatt, last_ocv_uv);
+ pr_info("r_sense=%u,i_test=%u,v_failure=%u\n", chip->r_sense, chip->i_test, chip->v_failure);
+ return 0;
+
+free_irqs:
+ free_irqs(chip);
+free_chip:
+ kfree(chip);
+ return rc;
+}
+
+static int __devexit pm8921_bms_remove(struct platform_device *pdev)
+{
+ struct pm8921_bms_chip *chip = platform_get_drvdata(pdev);
+
+ free_irqs(chip);
+ kfree(chip->adjusted_fcc_temp_lut);
+ platform_set_drvdata(pdev, NULL);
+ the_chip = NULL;
+ kfree(chip);
+ return 0;
+}
+
+static struct platform_driver pm8921_bms_driver = {
+ .probe = pm8921_bms_probe,
+ .remove = __devexit_p(pm8921_bms_remove),
+ .driver = {
+ .name = PM8921_BMS_DEV_NAME,
+ .owner = THIS_MODULE,
+ .pm = &pm8921_bms_pm_ops,
+ },
+};
+
+static int __init pm8921_bms_init(void)
+{
+ flag_enable_bms_chg_log =
+ (get_kernel_flag() & KERNEL_FLAG_ENABLE_BMS_CHARGER_LOG) ? 1 : 0;
+ return platform_driver_register(&pm8921_bms_driver);
+}
+
+static void __exit pm8921_bms_exit(void)
+{
+ platform_driver_unregister(&pm8921_bms_driver);
+}
+
+late_initcall(pm8921_bms_init);
+module_exit(pm8921_bms_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PMIC8921 bms driver");
+MODULE_VERSION("1.0");
+MODULE_ALIAS("platform:" PM8921_BMS_DEV_NAME);