| /* Copyright (c) 2012-2013, The Linux Foundation. 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) "%s: " fmt, __func__ |
| |
| #include <linux/kernel.h> |
| #include <linux/of.h> |
| #include <linux/err.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/mutex.h> |
| #include <linux/types.h> |
| #include <linux/hwmon.h> |
| #include <linux/module.h> |
| #include <linux/debugfs.h> |
| #include <linux/spmi.h> |
| #include <linux/of_irq.h> |
| #include <linux/wakelock.h> |
| #include <linux/interrupt.h> |
| #include <linux/completion.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/qpnp/qpnp-adc.h> |
| #include <linux/platform_device.h> |
| |
| /* QPNP IADC register definition */ |
| #define QPNP_IADC_REVISION1 0x0 |
| #define QPNP_IADC_REVISION2 0x1 |
| #define QPNP_IADC_REVISION3 0x2 |
| #define QPNP_IADC_REVISION4 0x3 |
| #define QPNP_IADC_PERPH_TYPE 0x4 |
| #define QPNP_IADC_PERH_SUBTYPE 0x5 |
| |
| #define QPNP_IADC_SUPPORTED_REVISION2 1 |
| |
| #define QPNP_STATUS1 0x8 |
| #define QPNP_STATUS1_OP_MODE 4 |
| #define QPNP_STATUS1_MULTI_MEAS_EN BIT(3) |
| #define QPNP_STATUS1_MEAS_INTERVAL_EN_STS BIT(2) |
| #define QPNP_STATUS1_REQ_STS BIT(1) |
| #define QPNP_STATUS1_EOC BIT(0) |
| #define QPNP_STATUS2 0x9 |
| #define QPNP_STATUS2_CONV_SEQ_STATE_SHIFT 4 |
| #define QPNP_STATUS2_FIFO_NOT_EMPTY_FLAG BIT(1) |
| #define QPNP_STATUS2_CONV_SEQ_TIMEOUT_STS BIT(0) |
| #define QPNP_CONV_TIMEOUT_ERR 2 |
| |
| #define QPNP_IADC_MODE_CTL 0x40 |
| #define QPNP_OP_MODE_SHIFT 4 |
| #define QPNP_USE_BMS_DATA BIT(4) |
| #define QPNP_VADC_SYNCH_EN BIT(2) |
| #define QPNP_OFFSET_RMV_EN BIT(1) |
| #define QPNP_ADC_TRIM_EN BIT(0) |
| #define QPNP_IADC_EN_CTL1 0x46 |
| #define QPNP_IADC_ADC_EN BIT(7) |
| #define QPNP_ADC_CH_SEL_CTL 0x48 |
| #define QPNP_ADC_DIG_PARAM 0x50 |
| #define QPNP_ADC_CLK_SEL_MASK 0x3 |
| #define QPNP_ADC_DEC_RATIO_SEL_MASK 0xc |
| #define QPNP_ADC_DIG_DEC_RATIO_SEL_SHIFT 2 |
| |
| #define QPNP_HW_SETTLE_DELAY 0x51 |
| #define QPNP_CONV_REQ 0x52 |
| #define QPNP_CONV_REQ_SET BIT(7) |
| #define QPNP_CONV_SEQ_CTL 0x54 |
| #define QPNP_CONV_SEQ_HOLDOFF_SHIFT 4 |
| #define QPNP_CONV_SEQ_TRIG_CTL 0x55 |
| #define QPNP_FAST_AVG_CTL 0x5a |
| |
| #define QPNP_M0_LOW_THR_LSB 0x5c |
| #define QPNP_M0_LOW_THR_MSB 0x5d |
| #define QPNP_M0_HIGH_THR_LSB 0x5e |
| #define QPNP_M0_HIGH_THR_MSB 0x5f |
| #define QPNP_M1_LOW_THR_LSB 0x69 |
| #define QPNP_M1_LOW_THR_MSB 0x6a |
| #define QPNP_M1_HIGH_THR_LSB 0x6b |
| #define QPNP_M1_HIGH_THR_MSB 0x6c |
| |
| #define QPNP_DATA0 0x60 |
| #define QPNP_DATA1 0x61 |
| #define QPNP_CONV_TIMEOUT_ERR 2 |
| |
| #define QPNP_IADC_SEC_ACCESS 0xD0 |
| #define QPNP_IADC_SEC_ACCESS_DATA 0xA5 |
| #define QPNP_IADC_MSB_OFFSET 0xF2 |
| #define QPNP_IADC_LSB_OFFSET 0xF3 |
| #define QPNP_IADC_NOMINAL_RSENSE 0xF4 |
| #define QPNP_IADC_ATE_GAIN_CALIB_OFFSET 0xF5 |
| #define QPNP_INT_TEST_VAL 0xE1 |
| |
| #define QPNP_IADC_ADC_CH_SEL_CTL 0x48 |
| #define QPNP_IADC_ADC_CHX_SEL_SHIFT 3 |
| |
| #define QPNP_IADC_ADC_DIG_PARAM 0x50 |
| #define QPNP_IADC_CLK_SEL_SHIFT 1 |
| #define QPNP_IADC_DEC_RATIO_SEL 3 |
| |
| #define QPNP_IADC_CONV_REQUEST 0x52 |
| #define QPNP_IADC_CONV_REQ BIT(7) |
| |
| #define QPNP_IADC_DATA0 0x60 |
| #define QPNP_IADC_DATA1 0x61 |
| |
| #define QPNP_ADC_CONV_TIME_MIN 8000 |
| #define QPNP_ADC_CONV_TIME_MAX 8200 |
| |
| #define QPNP_ADC_GAIN_NV 17857 |
| #define QPNP_OFFSET_CALIBRATION_SHORT_CADC_LEADS_IDEAL 0 |
| #define QPNP_IADC_INTERNAL_RSENSE_N_OHMS_FACTOR 10000000 |
| #define QPNP_IADC_NANO_VOLTS_FACTOR 1000000 |
| #define QPNP_IADC_CALIB_SECONDS 300000 |
| #define QPNP_IADC_RSENSE_LSB_N_OHMS_PER_BIT 15625 |
| #define QPNP_IADC_DIE_TEMP_CALIB_OFFSET 5000 |
| |
| #define QPNP_RAW_CODE_16_BIT_MSB_MASK 0xff00 |
| #define QPNP_RAW_CODE_16_BIT_LSB_MASK 0xff |
| #define QPNP_BIT_SHIFT_8 8 |
| #define QPNP_RSENSE_MSB_SIGN_CHECK 0x80 |
| #define QPNP_ADC_COMPLETION_TIMEOUT HZ |
| |
| struct qpnp_iadc_comp { |
| bool ext_rsense; |
| u8 id; |
| u8 sys_gain; |
| u8 revision; |
| }; |
| |
| struct qpnp_iadc_drv { |
| struct qpnp_adc_drv *adc; |
| int32_t rsense; |
| bool external_rsense; |
| struct device *iadc_hwmon; |
| bool iadc_initialized; |
| int64_t die_temp; |
| struct delayed_work iadc_work; |
| struct mutex iadc_vadc_lock; |
| bool iadc_mode_sel; |
| struct qpnp_iadc_comp iadc_comp; |
| struct qpnp_vadc_chip *vadc_dev; |
| struct sensor_device_attribute sens_attr[0]; |
| bool skip_auto_calibrations; |
| }; |
| |
| static struct qpnp_iadc_drv *qpnp_iadc; |
| |
| static int32_t qpnp_iadc_read_reg(uint32_t reg, u8 *data) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int rc; |
| |
| rc = spmi_ext_register_readl(iadc->adc->spmi->ctrl, iadc->adc->slave, |
| (iadc->adc->offset + reg), data, 1); |
| if (rc < 0) { |
| pr_err("qpnp iadc read reg %d failed with %d\n", reg, rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static int32_t qpnp_iadc_write_reg(uint32_t reg, u8 data) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int rc; |
| u8 *buf; |
| |
| buf = &data; |
| rc = spmi_ext_register_writel(iadc->adc->spmi->ctrl, iadc->adc->slave, |
| (iadc->adc->offset + reg), buf, 1); |
| if (rc < 0) { |
| pr_err("qpnp iadc write reg %d failed with %d\n", reg, rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static void trigger_iadc_completion(struct work_struct *work) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return; |
| |
| complete(&iadc->adc->adc_rslt_completion); |
| |
| return; |
| } |
| DECLARE_WORK(trigger_iadc_completion_work, trigger_iadc_completion); |
| |
| static irqreturn_t qpnp_iadc_isr(int irq, void *dev_id) |
| { |
| schedule_work(&trigger_iadc_completion_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int32_t qpnp_iadc_enable(bool state) |
| { |
| int rc = 0; |
| u8 data = 0; |
| |
| data = QPNP_IADC_ADC_EN; |
| if (state) { |
| rc = qpnp_iadc_write_reg(QPNP_IADC_EN_CTL1, |
| data); |
| if (rc < 0) { |
| pr_err("IADC enable failed\n"); |
| return rc; |
| } |
| } else { |
| rc = qpnp_iadc_write_reg(QPNP_IADC_EN_CTL1, |
| (~data & QPNP_IADC_ADC_EN)); |
| if (rc < 0) { |
| pr_err("IADC disable failed\n"); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int32_t qpnp_iadc_status_debug(void) |
| { |
| int rc = 0; |
| u8 mode = 0, status1 = 0, chan = 0, dig = 0, en = 0; |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_MODE_CTL, &mode); |
| if (rc < 0) { |
| pr_err("mode ctl register read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_ADC_DIG_PARAM, &dig); |
| if (rc < 0) { |
| pr_err("digital param read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_ADC_CH_SEL_CTL, &chan); |
| if (rc < 0) { |
| pr_err("channel read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_STATUS1, &status1); |
| if (rc < 0) { |
| pr_err("status1 read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_EN_CTL1, &en); |
| if (rc < 0) { |
| pr_err("en read failed with %d\n", rc); |
| return rc; |
| } |
| |
| pr_debug("EOC not set with status:%x, dig:%x, ch:%x, mode:%x, en:%x\n", |
| status1, dig, chan, mode, en); |
| |
| rc = qpnp_iadc_enable(false); |
| if (rc < 0) { |
| pr_err("IADC disable failed with %d\n", rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static int32_t qpnp_iadc_read_conversion_result(uint16_t *data) |
| { |
| uint8_t rslt_lsb, rslt_msb; |
| uint16_t rslt; |
| int32_t rc; |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_DATA0, &rslt_lsb); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_DATA1, &rslt_msb); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rslt = (rslt_msb << 8) | rslt_lsb; |
| *data = rslt; |
| |
| rc = qpnp_iadc_enable(false); |
| if (rc) |
| return rc; |
| |
| return 0; |
| } |
| |
| static int32_t qpnp_iadc_comp(int64_t *result, struct qpnp_iadc_comp comp, |
| int64_t die_temp) |
| { |
| int64_t temp_var = 0, sign_coeff = 0, sys_gain_coeff = 0, old; |
| |
| old = *result; |
| *result = *result * 1000000; |
| |
| if (comp.revision == QPNP_IADC_VER_3_1) { |
| /* revision 3.1 */ |
| if (comp.sys_gain > 127) |
| sys_gain_coeff = -QPNP_COEFF_6 * (comp.sys_gain - 128); |
| else |
| sys_gain_coeff = QPNP_COEFF_6 * comp.sys_gain; |
| } else if (comp.revision != QPNP_IADC_VER_3_0) { |
| /* unsupported revision, do not compensate */ |
| *result = old; |
| return 0; |
| } |
| |
| if (!comp.ext_rsense) { |
| /* internal rsense */ |
| switch (comp.id) { |
| case COMP_ID_TSMC: |
| temp_var = ((QPNP_COEFF_2 * die_temp) - |
| QPNP_COEFF_3_TYPEB); |
| break; |
| case COMP_ID_GF: |
| default: |
| temp_var = ((QPNP_COEFF_2 * die_temp) - |
| QPNP_COEFF_3_TYPEA); |
| break; |
| } |
| temp_var = div64_s64(temp_var, QPNP_COEFF_4); |
| if (comp.revision == QPNP_IADC_VER_3_0) |
| temp_var = QPNP_COEFF_1 * (1000000 - temp_var); |
| else if (comp.revision == QPNP_IADC_VER_3_1) |
| temp_var = 1000000 * (1000000 - temp_var); |
| *result = div64_s64(*result * 1000000, temp_var); |
| } |
| |
| sign_coeff = *result < 0 ? QPNP_COEFF_7 : QPNP_COEFF_5; |
| if (comp.ext_rsense) { |
| /* external rsense and current charging */ |
| temp_var = div64_s64((-sign_coeff * die_temp) + QPNP_COEFF_8, |
| QPNP_COEFF_4); |
| temp_var = 1000000000 - temp_var; |
| if (comp.revision == QPNP_IADC_VER_3_1) { |
| sys_gain_coeff = (1000000 + |
| div64_s64(sys_gain_coeff, QPNP_COEFF_4)); |
| temp_var = div64_s64(temp_var * sys_gain_coeff, |
| 1000000000); |
| } |
| *result = div64_s64(*result, temp_var); |
| } |
| pr_debug("%lld compensated into %lld\n", old, *result); |
| |
| return 0; |
| } |
| |
| int32_t qpnp_iadc_comp_result(int64_t *result) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| |
| return qpnp_iadc_comp(result, iadc->iadc_comp, iadc->die_temp); |
| } |
| EXPORT_SYMBOL(qpnp_iadc_comp_result); |
| |
| static int32_t qpnp_iadc_comp_info(void) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int rc = 0; |
| |
| rc = qpnp_iadc_read_reg(QPNP_INT_TEST_VAL, &iadc->iadc_comp.id); |
| if (rc < 0) { |
| pr_err("qpnp adc comp id failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_REVISION2, &iadc->iadc_comp.revision); |
| if (rc < 0) { |
| pr_err("qpnp adc revision read failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_ATE_GAIN_CALIB_OFFSET, |
| &iadc->iadc_comp.sys_gain); |
| if (rc < 0) { |
| pr_err("full scale read failed with %d\n", rc); |
| return rc; |
| } |
| |
| if (iadc->external_rsense) |
| iadc->iadc_comp.ext_rsense = true; |
| |
| pr_debug("fab id = %u, revision = %u, sys gain = %u, external_rsense = %d\n", |
| iadc->iadc_comp.id, |
| iadc->iadc_comp.revision, |
| iadc->iadc_comp.sys_gain, |
| iadc->iadc_comp.ext_rsense); |
| return rc; |
| } |
| |
| static int32_t qpnp_iadc_configure(enum qpnp_iadc_channels channel, |
| uint16_t *raw_code, uint32_t mode_sel) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| u8 qpnp_iadc_mode_reg = 0, qpnp_iadc_ch_sel_reg = 0; |
| u8 qpnp_iadc_conv_req = 0, qpnp_iadc_dig_param_reg = 0; |
| int32_t rc = 0; |
| |
| qpnp_iadc_ch_sel_reg = channel; |
| |
| qpnp_iadc_dig_param_reg |= iadc->adc->amux_prop->decimation << |
| QPNP_IADC_DEC_RATIO_SEL; |
| if (iadc->iadc_mode_sel) |
| qpnp_iadc_mode_reg |= (QPNP_ADC_TRIM_EN | QPNP_VADC_SYNCH_EN); |
| else |
| qpnp_iadc_mode_reg |= QPNP_ADC_TRIM_EN; |
| |
| qpnp_iadc_conv_req = QPNP_IADC_CONV_REQ; |
| |
| rc = qpnp_iadc_write_reg(QPNP_IADC_MODE_CTL, qpnp_iadc_mode_reg); |
| if (rc) { |
| pr_err("qpnp adc read adc failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_IADC_ADC_CH_SEL_CTL, |
| qpnp_iadc_ch_sel_reg); |
| if (rc) { |
| pr_err("qpnp adc read adc failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_ADC_DIG_PARAM, |
| qpnp_iadc_dig_param_reg); |
| if (rc) { |
| pr_err("qpnp adc read adc failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_HW_SETTLE_DELAY, |
| iadc->adc->amux_prop->hw_settle_time); |
| if (rc < 0) { |
| pr_err("qpnp adc configure error for hw settling time setup\n"); |
| return rc; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_FAST_AVG_CTL, |
| iadc->adc->amux_prop->fast_avg_setup); |
| if (rc < 0) { |
| pr_err("qpnp adc fast averaging configure error\n"); |
| return rc; |
| } |
| |
| INIT_COMPLETION(iadc->adc->adc_rslt_completion); |
| |
| rc = qpnp_iadc_enable(true); |
| if (rc) |
| return rc; |
| |
| rc = qpnp_iadc_write_reg(QPNP_CONV_REQ, qpnp_iadc_conv_req); |
| if (rc) { |
| pr_err("qpnp adc read adc failed with %d\n", rc); |
| return rc; |
| } |
| |
| rc = wait_for_completion_timeout(&iadc->adc->adc_rslt_completion, |
| QPNP_ADC_COMPLETION_TIMEOUT); |
| if (!rc) { |
| u8 status1 = 0; |
| rc = qpnp_iadc_read_reg(QPNP_STATUS1, &status1); |
| if (rc < 0) |
| return rc; |
| status1 &= (QPNP_STATUS1_REQ_STS | QPNP_STATUS1_EOC); |
| if (status1 == QPNP_STATUS1_EOC) |
| pr_debug("End of conversion status set\n"); |
| else { |
| rc = qpnp_iadc_status_debug(); |
| if (rc < 0) { |
| pr_err("status1 read failed with %d\n", rc); |
| return rc; |
| } |
| return -EINVAL; |
| } |
| } |
| |
| rc = qpnp_iadc_read_conversion_result(raw_code); |
| if (rc) { |
| pr_err("qpnp adc read adc failed with %d\n", rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| #define IADC_CENTER 0xC000 |
| #define IADC_READING_RESOLUTION_N 542535 |
| #define IADC_READING_RESOLUTION_D 100000 |
| static int32_t qpnp_convert_raw_offset_voltage(void) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| s64 numerator; |
| |
| if ((iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw) == 0) { |
| pr_err("raw offset errors! raw_gain:0x%x and raw_offset:0x%x\n", |
| iadc->adc->calib.gain_raw, iadc->adc->calib.offset_raw); |
| return -EINVAL; |
| } |
| |
| numerator = iadc->adc->calib.offset_raw - IADC_CENTER; |
| numerator *= IADC_READING_RESOLUTION_N; |
| iadc->adc->calib.offset_uv = div_s64(numerator, |
| IADC_READING_RESOLUTION_D); |
| |
| numerator = iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw; |
| numerator *= IADC_READING_RESOLUTION_N; |
| |
| iadc->adc->calib.gain_uv = div_s64(numerator, |
| IADC_READING_RESOLUTION_D); |
| |
| pr_debug("gain_uv:%d offset_uv:%d\n", |
| iadc->adc->calib.gain_uv, iadc->adc->calib.offset_uv); |
| return 0; |
| } |
| |
| int32_t qpnp_iadc_calibrate_for_trim(bool batfet_closed) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| uint8_t rslt_lsb, rslt_msb; |
| int32_t rc = 0; |
| uint16_t raw_data; |
| uint32_t mode_sel = 0; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| mutex_lock(&iadc->adc->adc_lock); |
| |
| rc = qpnp_iadc_configure(GAIN_CALIBRATION_17P857MV, |
| &raw_data, mode_sel); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| goto fail; |
| } |
| |
| iadc->adc->calib.gain_raw = raw_data; |
| |
| /* |
| * there is a features in the BMS where if the batfet is opened |
| * the BMS reads from INTERNAL_RSENSE (channel 0) actually go to |
| * OFFSET_CALIBRATION_CSP_CSN (channel 5). Hence if batfet is opened |
| * we have to calibrate based on OFFSET_CALIBRATION_CSP_CSN even for |
| * internal rsense. |
| */ |
| if (!batfet_closed || iadc->external_rsense) { |
| /* external offset calculation */ |
| rc = qpnp_iadc_configure(OFFSET_CALIBRATION_CSP_CSN, |
| &raw_data, mode_sel); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| goto fail; |
| } |
| } else { |
| /* internal offset calculation */ |
| rc = qpnp_iadc_configure(OFFSET_CALIBRATION_CSP2_CSN2, |
| &raw_data, mode_sel); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| goto fail; |
| } |
| } |
| |
| iadc->adc->calib.offset_raw = raw_data; |
| if (rc < 0) { |
| pr_err("qpnp adc offset/gain calculation failed\n"); |
| goto fail; |
| } |
| |
| pr_debug("raw gain:0x%x, raw offset:0x%x\n", |
| iadc->adc->calib.gain_raw, iadc->adc->calib.offset_raw); |
| |
| rc = qpnp_convert_raw_offset_voltage(); |
| if (rc < 0) { |
| pr_err("qpnp raw_voltage conversion failed\n"); |
| goto fail; |
| } |
| |
| rslt_msb = (raw_data & QPNP_RAW_CODE_16_BIT_MSB_MASK) >> |
| QPNP_BIT_SHIFT_8; |
| rslt_lsb = raw_data & QPNP_RAW_CODE_16_BIT_LSB_MASK; |
| |
| pr_debug("trim values:lsb:0x%x and msb:0x%x\n", rslt_lsb, rslt_msb); |
| |
| rc = qpnp_iadc_write_reg(QPNP_IADC_SEC_ACCESS, |
| QPNP_IADC_SEC_ACCESS_DATA); |
| if (rc < 0) { |
| pr_err("qpnp iadc configure error for sec access\n"); |
| goto fail; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_IADC_MSB_OFFSET, |
| rslt_msb); |
| if (rc < 0) { |
| pr_err("qpnp iadc configure error for MSB write\n"); |
| goto fail; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_IADC_SEC_ACCESS, |
| QPNP_IADC_SEC_ACCESS_DATA); |
| if (rc < 0) { |
| pr_err("qpnp iadc configure error for sec access\n"); |
| goto fail; |
| } |
| |
| rc = qpnp_iadc_write_reg(QPNP_IADC_LSB_OFFSET, |
| rslt_lsb); |
| if (rc < 0) { |
| pr_err("qpnp iadc configure error for LSB write\n"); |
| goto fail; |
| } |
| fail: |
| mutex_unlock(&iadc->adc->adc_lock); |
| return rc; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_calibrate_for_trim); |
| |
| static void qpnp_iadc_work(struct work_struct *work) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int rc = 0; |
| |
| if (!iadc->skip_auto_calibrations) { |
| rc = qpnp_iadc_calibrate_for_trim(true); |
| if (rc) |
| pr_debug("periodic IADC calibration failed\n"); |
| } |
| |
| schedule_delayed_work(&iadc->iadc_work, |
| round_jiffies_relative(msecs_to_jiffies |
| (QPNP_IADC_CALIB_SECONDS))); |
| return; |
| } |
| |
| static int32_t qpnp_iadc_version_check(void) |
| { |
| uint8_t revision; |
| int rc; |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_REVISION2, &revision); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| return rc; |
| } |
| |
| if (revision < QPNP_IADC_SUPPORTED_REVISION2) { |
| pr_err("IADC Version not supported\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| int32_t qpnp_iadc_is_ready(void) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| else |
| return 0; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_is_ready); |
| |
| int32_t qpnp_iadc_get_rsense(int32_t *rsense) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| uint8_t rslt_rsense; |
| int32_t rc = 0, sign_bit = 0; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| if (iadc->external_rsense) { |
| *rsense = iadc->rsense; |
| return rc; |
| } |
| |
| rc = qpnp_iadc_read_reg(QPNP_IADC_NOMINAL_RSENSE, &rslt_rsense); |
| if (rc < 0) { |
| pr_err("qpnp adc rsense read failed with %d\n", rc); |
| return rc; |
| } |
| |
| pr_debug("rsense:0%x\n", rslt_rsense); |
| |
| if (rslt_rsense & QPNP_RSENSE_MSB_SIGN_CHECK) |
| sign_bit = 1; |
| |
| rslt_rsense &= ~QPNP_RSENSE_MSB_SIGN_CHECK; |
| |
| if (sign_bit) |
| *rsense = QPNP_IADC_INTERNAL_RSENSE_N_OHMS_FACTOR - |
| (rslt_rsense * QPNP_IADC_RSENSE_LSB_N_OHMS_PER_BIT); |
| else |
| *rsense = QPNP_IADC_INTERNAL_RSENSE_N_OHMS_FACTOR + |
| (rslt_rsense * QPNP_IADC_RSENSE_LSB_N_OHMS_PER_BIT); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_get_rsense); |
| |
| static int32_t qpnp_check_pmic_temp(void) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| struct qpnp_vadc_result result_pmic_therm; |
| int64_t die_temp_offset; |
| int rc = 0; |
| |
| rc = qpnp_vadc_read(iadc->vadc_dev, DIE_TEMP, &result_pmic_therm); |
| if (rc < 0) |
| return rc; |
| |
| die_temp_offset = result_pmic_therm.physical - |
| iadc->die_temp; |
| if (die_temp_offset < 0) |
| die_temp_offset = -die_temp_offset; |
| |
| if (die_temp_offset > QPNP_IADC_DIE_TEMP_CALIB_OFFSET) { |
| iadc->die_temp = result_pmic_therm.physical; |
| if (!iadc->skip_auto_calibrations) { |
| rc = qpnp_iadc_calibrate_for_trim(true); |
| if (rc) |
| pr_err("IADC calibration failed rc = %d\n", rc); |
| } |
| } |
| |
| return rc; |
| } |
| |
| int32_t qpnp_iadc_read(enum qpnp_iadc_channels channel, |
| struct qpnp_iadc_result *result) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int32_t rc, rsense_n_ohms, sign = 0, num, mode_sel = 0; |
| int32_t rsense_u_ohms = 0; |
| int64_t result_current; |
| uint16_t raw_data; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| if (!iadc->iadc_mode_sel) { |
| rc = qpnp_check_pmic_temp(); |
| if (rc) { |
| pr_err("Error checking pmic therm temp\n"); |
| return rc; |
| } |
| } |
| |
| mutex_lock(&iadc->adc->adc_lock); |
| |
| rc = qpnp_iadc_configure(channel, &raw_data, mode_sel); |
| if (rc < 0) { |
| pr_err("qpnp adc result read failed with %d\n", rc); |
| goto fail; |
| } |
| |
| rc = qpnp_iadc_get_rsense(&rsense_n_ohms); |
| pr_debug("current raw:0%x and rsense:%d\n", |
| raw_data, rsense_n_ohms); |
| rsense_u_ohms = rsense_n_ohms/1000; |
| num = raw_data - iadc->adc->calib.offset_raw; |
| if (num < 0) { |
| sign = 1; |
| num = -num; |
| } |
| |
| result->result_uv = (num * QPNP_ADC_GAIN_NV)/ |
| (iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw); |
| result_current = result->result_uv; |
| result_current *= QPNP_IADC_NANO_VOLTS_FACTOR; |
| /* Intentional fall through. Process the result w/o comp */ |
| do_div(result_current, rsense_u_ohms); |
| |
| if (sign) { |
| result->result_uv = -result->result_uv; |
| result_current = -result_current; |
| } |
| rc = qpnp_iadc_comp_result(&result_current); |
| if (rc < 0) |
| pr_err("Error during compensating the IADC\n"); |
| rc = 0; |
| |
| result->result_ua = (int32_t) result_current; |
| fail: |
| mutex_unlock(&iadc->adc->adc_lock); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_read); |
| |
| int32_t qpnp_iadc_get_gain_and_offset(struct qpnp_iadc_calib *result) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int rc; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| rc = qpnp_check_pmic_temp(); |
| if (rc) { |
| pr_err("Error checking pmic therm temp\n"); |
| return rc; |
| } |
| |
| mutex_lock(&iadc->adc->adc_lock); |
| result->gain_raw = iadc->adc->calib.gain_raw; |
| result->ideal_gain_nv = QPNP_ADC_GAIN_NV; |
| result->gain_uv = iadc->adc->calib.gain_uv; |
| result->offset_raw = iadc->adc->calib.offset_raw; |
| result->ideal_offset_uv = |
| QPNP_OFFSET_CALIBRATION_SHORT_CADC_LEADS_IDEAL; |
| result->offset_uv = iadc->adc->calib.offset_uv; |
| pr_debug("raw gain:0%x, raw offset:0%x\n", |
| result->gain_raw, result->offset_raw); |
| pr_debug("gain_uv:%d offset_uv:%d\n", |
| result->gain_uv, result->offset_uv); |
| mutex_unlock(&iadc->adc->adc_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_get_gain_and_offset); |
| |
| int qpnp_iadc_skip_calibration(void) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| iadc->skip_auto_calibrations = true; |
| return 0; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_skip_calibration); |
| |
| int qpnp_iadc_resume_calibration(void) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| iadc->skip_auto_calibrations = false; |
| return 0; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_resume_calibration); |
| |
| int32_t qpnp_iadc_vadc_sync_read( |
| enum qpnp_iadc_channels i_channel, struct qpnp_iadc_result *i_result, |
| enum qpnp_vadc_channels v_channel, struct qpnp_vadc_result *v_result) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| int rc = 0; |
| |
| if (!iadc || !iadc->iadc_initialized) |
| return -EPROBE_DEFER; |
| |
| mutex_lock(&iadc->iadc_vadc_lock); |
| |
| rc = qpnp_check_pmic_temp(); |
| if (rc) { |
| pr_err("PMIC die temp check failed\n"); |
| goto fail; |
| } |
| |
| iadc->iadc_mode_sel = true; |
| |
| rc = qpnp_vadc_iadc_sync_request(iadc->vadc_dev, v_channel); |
| if (rc) { |
| pr_err("Configuring VADC failed\n"); |
| goto fail; |
| } |
| |
| rc = qpnp_iadc_read(i_channel, i_result); |
| if (rc) |
| pr_err("Configuring IADC failed\n"); |
| /* Intentional fall through to release VADC */ |
| |
| rc = qpnp_vadc_iadc_sync_complete_request(iadc->vadc_dev, v_channel, |
| v_result); |
| if (rc) |
| pr_err("Releasing VADC failed\n"); |
| fail: |
| iadc->iadc_mode_sel = false; |
| |
| mutex_unlock(&iadc->iadc_vadc_lock); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(qpnp_iadc_vadc_sync_read); |
| |
| static ssize_t qpnp_iadc_show(struct device *dev, |
| struct device_attribute *devattr, char *buf) |
| { |
| struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| struct qpnp_iadc_result result; |
| int rc = -1; |
| |
| rc = qpnp_iadc_read(attr->index, &result); |
| |
| if (rc) |
| return 0; |
| |
| return snprintf(buf, QPNP_ADC_HWMON_NAME_LENGTH, |
| "Result:%d\n", result.result_ua); |
| } |
| |
| static struct sensor_device_attribute qpnp_adc_attr = |
| SENSOR_ATTR(NULL, S_IRUGO, qpnp_iadc_show, NULL, 0); |
| |
| static int32_t qpnp_iadc_init_hwmon(struct spmi_device *spmi) |
| { |
| struct qpnp_iadc_drv *iadc = qpnp_iadc; |
| struct device_node *child; |
| struct device_node *node = spmi->dev.of_node; |
| int rc = 0, i = 0, channel; |
| |
| for_each_child_of_node(node, child) { |
| channel = iadc->adc->adc_channels[i].channel_num; |
| qpnp_adc_attr.index = iadc->adc->adc_channels[i].channel_num; |
| qpnp_adc_attr.dev_attr.attr.name = |
| iadc->adc->adc_channels[i].name; |
| memcpy(&iadc->sens_attr[i], &qpnp_adc_attr, |
| sizeof(qpnp_adc_attr)); |
| sysfs_attr_init(&iadc->sens_attr[i].dev_attr.attr); |
| rc = device_create_file(&spmi->dev, |
| &iadc->sens_attr[i].dev_attr); |
| if (rc) { |
| dev_err(&spmi->dev, |
| "device_create_file failed for dev %s\n", |
| iadc->adc->adc_channels[i].name); |
| goto hwmon_err_sens; |
| } |
| i++; |
| } |
| |
| return 0; |
| hwmon_err_sens: |
| pr_err("Init HWMON failed for qpnp_iadc with %d\n", rc); |
| return rc; |
| } |
| |
| static int __devinit qpnp_iadc_probe(struct spmi_device *spmi) |
| { |
| struct qpnp_iadc_drv *iadc; |
| struct qpnp_adc_drv *adc_qpnp; |
| struct device_node *node = spmi->dev.of_node; |
| struct device_node *child; |
| int rc, count_adc_channel_list = 0; |
| |
| if (!node) |
| return -EINVAL; |
| |
| if (qpnp_iadc) { |
| pr_err("IADC already in use\n"); |
| return -EBUSY; |
| } |
| |
| for_each_child_of_node(node, child) |
| count_adc_channel_list++; |
| |
| if (!count_adc_channel_list) { |
| pr_err("No channel listing\n"); |
| return -EINVAL; |
| } |
| |
| iadc = devm_kzalloc(&spmi->dev, sizeof(struct qpnp_iadc_drv) + |
| (sizeof(struct sensor_device_attribute) * |
| count_adc_channel_list), GFP_KERNEL); |
| if (!iadc) { |
| dev_err(&spmi->dev, "Unable to allocate memory\n"); |
| return -ENOMEM; |
| } |
| |
| adc_qpnp = devm_kzalloc(&spmi->dev, sizeof(struct qpnp_adc_drv), |
| GFP_KERNEL); |
| if (!adc_qpnp) { |
| dev_err(&spmi->dev, "Unable to allocate memory\n"); |
| rc = -ENOMEM; |
| goto fail; |
| } |
| |
| iadc->adc = adc_qpnp; |
| |
| rc = qpnp_adc_get_devicetree_data(spmi, iadc->adc); |
| if (rc) { |
| dev_err(&spmi->dev, "failed to read device tree\n"); |
| goto fail; |
| } |
| |
| iadc->vadc_dev = qpnp_get_vadc(&spmi->dev, "iadc"); |
| if (IS_ERR(iadc->vadc_dev)) { |
| rc = PTR_ERR(iadc->vadc_dev); |
| if (rc != -EPROBE_DEFER) |
| pr_err("vadc property missing, rc=%d\n", rc); |
| goto fail; |
| } |
| |
| mutex_init(&iadc->adc->adc_lock); |
| |
| rc = of_property_read_u32(node, "qcom,rsense", |
| &iadc->rsense); |
| if (rc) |
| pr_debug("Defaulting to internal rsense\n"); |
| else { |
| pr_debug("Use external rsense\n"); |
| iadc->external_rsense = true; |
| } |
| |
| rc = devm_request_irq(&spmi->dev, iadc->adc->adc_irq_eoc, |
| qpnp_iadc_isr, |
| IRQF_TRIGGER_RISING, "qpnp_iadc_interrupt", iadc); |
| if (rc) { |
| dev_err(&spmi->dev, "failed to request adc irq\n"); |
| goto fail; |
| } else |
| enable_irq_wake(iadc->adc->adc_irq_eoc); |
| |
| dev_set_drvdata(&spmi->dev, iadc); |
| qpnp_iadc = iadc; |
| |
| rc = qpnp_iadc_init_hwmon(spmi); |
| if (rc) { |
| dev_err(&spmi->dev, "failed to initialize qpnp hwmon adc\n"); |
| goto fail; |
| } |
| iadc->iadc_hwmon = hwmon_device_register(&iadc->adc->spmi->dev); |
| |
| rc = qpnp_iadc_version_check(); |
| if (rc) { |
| dev_err(&spmi->dev, "IADC version not supported\n"); |
| goto fail; |
| } |
| |
| mutex_init(&iadc->iadc_vadc_lock); |
| INIT_DELAYED_WORK(&iadc->iadc_work, qpnp_iadc_work); |
| rc = qpnp_iadc_comp_info(); |
| if (rc) { |
| dev_err(&spmi->dev, "abstracting IADC comp info failed!\n"); |
| goto fail; |
| } |
| iadc->iadc_initialized = true; |
| |
| rc = qpnp_iadc_calibrate_for_trim(true); |
| if (rc) |
| dev_err(&spmi->dev, "failed to calibrate for USR trim\n"); |
| schedule_delayed_work(&iadc->iadc_work, |
| round_jiffies_relative(msecs_to_jiffies |
| (QPNP_IADC_CALIB_SECONDS))); |
| return 0; |
| fail: |
| qpnp_iadc = NULL; |
| return rc; |
| } |
| |
| static int __devexit qpnp_iadc_remove(struct spmi_device *spmi) |
| { |
| struct qpnp_iadc_drv *iadc = dev_get_drvdata(&spmi->dev); |
| struct device_node *node = spmi->dev.of_node; |
| struct device_node *child; |
| int i = 0; |
| |
| cancel_delayed_work(&iadc->iadc_work); |
| mutex_destroy(&iadc->iadc_vadc_lock); |
| for_each_child_of_node(node, child) { |
| device_remove_file(&spmi->dev, |
| &iadc->sens_attr[i].dev_attr); |
| i++; |
| } |
| dev_set_drvdata(&spmi->dev, NULL); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id qpnp_iadc_match_table[] = { |
| { .compatible = "qcom,qpnp-iadc", |
| }, |
| {} |
| }; |
| |
| static struct spmi_driver qpnp_iadc_driver = { |
| .driver = { |
| .name = "qcom,qpnp-iadc", |
| .of_match_table = qpnp_iadc_match_table, |
| }, |
| .probe = qpnp_iadc_probe, |
| .remove = qpnp_iadc_remove, |
| }; |
| |
| static int __init qpnp_iadc_init(void) |
| { |
| return spmi_driver_register(&qpnp_iadc_driver); |
| } |
| module_init(qpnp_iadc_init); |
| |
| static void __exit qpnp_iadc_exit(void) |
| { |
| spmi_driver_unregister(&qpnp_iadc_driver); |
| } |
| module_exit(qpnp_iadc_exit); |
| |
| MODULE_DESCRIPTION("QPNP PMIC current ADC driver"); |
| MODULE_LICENSE("GPL v2"); |