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-rw-r--r--common/recipes-core/fan-ctrl/fan-ctrl/w83795.cpp396
1 files changed, 396 insertions, 0 deletions
diff --git a/common/recipes-core/fan-ctrl/fan-ctrl/w83795.cpp b/common/recipes-core/fan-ctrl/fan-ctrl/w83795.cpp
new file mode 100644
index 0000000..c327957
--- /dev/null
+++ b/common/recipes-core/fan-ctrl/fan-ctrl/w83795.cpp
@@ -0,0 +1,396 @@
+/*
+ * Copyright (C) 2012 Advanced Micro Devices, Inc.
+ * Copyright (C) 2015-2017 Raptor Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/ioctl.h>
+#include <linux/i2c-dev.h>
+#include "w83795.h"
+
+#define BIOS_DEBUG 0
+#define BIOS_INFO 1
+#define BIOS_WARNING 2
+#define BIOS_ERR 3
+
+extern int smbus_fd;
+
+// =========================================================================================================================
+// Taken from lm-sensors
+// =========================================================================================================================
+#define I2C_SMBUS_READ 1
+#define I2C_SMBUS_WRITE 0
+#define I2C_SMBUS_BLOCK_MAX 32
+#define I2C_SMBUS_BYTE_DATA 2
+#define I2C_SMBUS 0x0720
+
+union i2c_smbus_data {
+ __u8 byte;
+ __u16 word;
+ __u8 block[I2C_SMBUS_BLOCK_MAX + 2];
+};
+
+static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command, int size, union i2c_smbus_data *data) {
+ struct i2c_smbus_ioctl_data args;
+
+ args.read_write = read_write;
+ args.command = command;
+ args.size = size;
+ args.data = data;
+ return ioctl(file,I2C_SMBUS,&args);
+}
+
+static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command, I2C_SMBUS_BYTE_DATA,&data))
+ return -1;
+ else
+ return 0x0ff & data.byte;
+}
+
+static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command, __u8 value) {
+ union i2c_smbus_data data;
+ data.byte = value;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command, I2C_SMBUS_BYTE_DATA, &data);
+}
+// =========================================================================================================================
+
+int smbus_write_byte(uint8_t addr, uint8_t value) {
+ return i2c_smbus_write_byte_data(smbus_fd, addr, value);
+}
+
+uint8_t smbus_read_byte(uint8_t addr) {
+ return i2c_smbus_read_byte_data(smbus_fd, addr);
+}
+
+void printk(int severity, const char* format, ...) {
+ va_list args;
+ va_start(args, format);
+ vprintf(format, args);
+ va_end(args);
+}
+
+static int w83795_set_bank(uint8_t bank)
+{
+ return smbus_write_byte(W83795_REG_BANKSEL, bank);
+}
+
+static uint8_t w83795_read(uint16_t reg)
+{
+ int ret;
+
+ ret = w83795_set_bank(reg >> 8);
+ if (ret < 0) {
+ printk(BIOS_DEBUG, "read failed to set bank %x\n", reg >> 8);
+ return -1;
+ }
+
+ ret = smbus_read_byte(reg & 0xff);
+ return ret;
+}
+
+static uint8_t w83795_write(uint16_t reg, uint8_t value)
+{
+ int err;
+
+ err = w83795_set_bank(reg >> 8);
+ if (err < 0) {
+ printk(BIOS_DEBUG, "write failed to set bank %x\n", reg >> 8);
+ return -1;
+ }
+
+ err = smbus_write_byte(reg & 0xff, value);
+ return err;
+}
+
+/*
+ * Configure Digital Temperature Sensor
+ */
+static void w83795_dts_configure(uint8_t dts_src)
+{
+ uint8_t val;
+
+ /* DIS */
+ val = w83795_read(W83795_REG_DTSC) & ~0x1;
+ val |= dts_src & 0x1;
+ w83795_write(W83795_REG_DTSC, val);
+
+ /* TODO
+ * Determine if DTS interface needs to be reset
+ * (W83795_REG_DTSC bit 7) before operation.
+ */
+}
+
+static uint32_t w83795_set_fan_mode(w83795_fan_mode_t mode)
+{
+ if (mode == SPEED_CRUISE_MODE) {
+ w83795_write(W83795_REG_FCMS1, 0xFF);
+ printk(BIOS_INFO, "W83795G/ADG work in Speed Cruise Mode\n");
+ } else {
+ w83795_write(W83795_REG_FCMS1, 0x00);
+ if (mode == THERMAL_CRUISE_MODE) {
+ w83795_write(W83795_REG_FCMS2, 0x00);
+ printk(BIOS_INFO, "W83795G/ADG work in Thermal Cruise Mode\n");
+ } else if (mode == SMART_FAN_MODE) {
+ w83795_write(W83795_REG_FCMS2, 0x3F);
+ printk(BIOS_INFO, "W83795G/ADG work in Smart Fan Mode\n");
+ } else {
+ printk(BIOS_INFO, "W83795G/ADG work in Manual Mode\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void w83795_set_fan(w83795_fan_mode_t mode)
+{
+ /* set fan output controlled mode (FCMS)*/
+ w83795_set_fan_mode(mode);
+
+ if (mode == SMART_FAN_MODE) {
+ /* Set the Relative Register-at SMART FAN IV Control Mode Table */
+ //SFIV TODO
+ }
+
+ /* Set Hysteresis of Temperature (HT) */
+ //TODO
+}
+
+static uint8_t fan_pct_to_cfg_val(uint8_t percent)
+{
+ uint16_t cfg = (((unsigned int)percent * 10000) / 3922);
+ if (cfg > 0xff)
+ cfg = 0xff;
+ return cfg;
+}
+
+static uint8_t millivolts_to_limit_value_type1(int millivolts)
+{
+ /* Datasheet v1.41 pages 44 and 70 (VSEN1 - VSEN11, VTT) */
+ return ((millivolts / 2) >> 2);
+}
+
+static uint8_t millivolts_to_limit_value_type2(int millivolts)
+{
+ /* Datasheet v1.41 page pages 44 and 70 (3VSB, 3VDD, VBAT) */
+ return ((millivolts / 6) >> 2);
+}
+
+static uint16_t millivolts_to_limit_value_type3(int millivolts)
+{
+ /* Datasheet v1.41 page 45 (VSEN12, VSEN13, VDSEN14 - VDSEN17) */
+ return (millivolts / 2);
+}
+
+void w83795_init(w83795_fan_mode_t mode, uint8_t dts_src, struct drivers_i2c_w83795_config *config)
+{
+ uint8_t i;
+ uint8_t val;
+ uint16_t limit_value;
+
+ if (smbus_read_byte(0x00) < 0) {
+ printk(BIOS_ERR, "W83795G/ADG Nuvoton H/W Monitor not found\n");
+ return;
+ }
+ val = w83795_read(W83795_REG_CONFIG);
+ if ((val & W83795_REG_CONFIG_CONFIG48) == 0)
+ printk(BIOS_INFO, "Found 64 pin W83795G Nuvoton H/W Monitor\n");
+ else
+ printk(BIOS_INFO, "Found 48 pin W83795ADG Nuvoton H/W Monitor\n");
+
+ /* Reset */
+ val |= W83795_REG_CONFIG_INIT;
+ w83795_write(W83795_REG_CONFIG, val);
+
+ /* Fan monitor settings */
+ w83795_write(W83795_REG_FANIN_CTRL1, config->fanin_ctl1);
+ w83795_write(W83795_REG_FANIN_CTRL2, config->fanin_ctl2);
+
+ /* Temperature thresholds */
+ w83795_write(W83795_REG_TEMP_CRIT(0), config->tr1_critical_temperature);
+ w83795_write(W83795_REG_TEMP_CRIT_HYSTER(0), config->tr1_critical_hysteresis);
+ w83795_write(W83795_REG_TEMP_WARN(0), config->tr1_warning_temperature);
+ w83795_write(W83795_REG_TEMP_WARN_HYSTER(0), config->tr1_warning_hysteresis);
+ w83795_write(W83795_REG_TEMP_CRIT(1), config->tr2_critical_temperature);
+ w83795_write(W83795_REG_TEMP_CRIT_HYSTER(1), config->tr2_critical_hysteresis);
+ w83795_write(W83795_REG_TEMP_WARN(1), config->tr2_warning_temperature);
+ w83795_write(W83795_REG_TEMP_WARN_HYSTER(1), config->tr2_warning_hysteresis);
+ w83795_write(W83795_REG_TEMP_CRIT(2), config->tr3_critical_temperature);
+ w83795_write(W83795_REG_TEMP_CRIT_HYSTER(2), config->tr3_critical_hysteresis);
+ w83795_write(W83795_REG_TEMP_WARN(2), config->tr3_warning_temperature);
+ w83795_write(W83795_REG_TEMP_WARN_HYSTER(2), config->tr3_warning_hysteresis);
+ w83795_write(W83795_REG_TEMP_CRIT(3), config->tr4_critical_temperature);
+ w83795_write(W83795_REG_TEMP_CRIT_HYSTER(3), config->tr4_critical_hysteresis);
+ w83795_write(W83795_REG_TEMP_WARN(3), config->tr4_warning_temperature);
+ w83795_write(W83795_REG_TEMP_WARN_HYSTER(3), config->tr4_warning_hysteresis);
+ w83795_write(W83795_REG_TEMP_CRIT(4), config->tr5_critical_temperature);
+ w83795_write(W83795_REG_TEMP_CRIT_HYSTER(4), config->tr5_critical_hysteresis);
+ w83795_write(W83795_REG_TEMP_WARN(4), config->tr5_warning_temperature);
+ w83795_write(W83795_REG_TEMP_WARN_HYSTER(4), config->tr5_warning_hysteresis);
+ w83795_write(W83795_REG_TEMP_CRIT(5), config->tr6_critical_temperature);
+ w83795_write(W83795_REG_TEMP_CRIT_HYSTER(5), config->tr6_critical_hysteresis);
+ w83795_write(W83795_REG_TEMP_WARN(5), config->tr6_warning_temperature);
+ w83795_write(W83795_REG_TEMP_WARN_HYSTER(5), config->tr6_warning_hysteresis);
+
+ /* DTS temperature thresholds */
+ w83795_write(W83795_REG_DTS_CRIT, config->dts_critical_temperature);
+ w83795_write(W83795_REG_DTS_CRIT_HYSTER, config->dts_critical_hysteresis);
+ w83795_write(W83795_REG_DTS_WARN, config->dts_warning_temperature);
+ w83795_write(W83795_REG_DTS_WARN_HYSTER, config->dts_warning_hysteresis);
+
+ /* Configure DTS registers in bank3 before enabling DTS */
+ w83795_dts_configure(dts_src);
+
+ /* DTS enable */
+ w83795_write(W83795_REG_DTSE, config->temp_dtse);
+
+ /* Temperature monitor settings */
+ w83795_write(W83795_REG_TEMP_CTRL1, config->temp_ctl1);
+ w83795_write(W83795_REG_TEMP_CTRL2, config->temp_ctl2);
+
+ /* Temperature to fan mappings */
+ w83795_write(W83795_REG_TFMR(0), config->temp1_fan_select);
+ w83795_write(W83795_REG_TFMR(1), config->temp2_fan_select);
+ w83795_write(W83795_REG_TFMR(2), config->temp3_fan_select);
+ w83795_write(W83795_REG_TFMR(3), config->temp4_fan_select);
+ w83795_write(W83795_REG_TFMR(4), config->temp5_fan_select);
+ w83795_write(W83795_REG_TFMR(5), config->temp6_fan_select);
+
+ /* Temperature data source to temperature mappings */
+ w83795_write(W83795_REG_T12TSS, ((config->temp2_source_select & 0x0f) << 4) | (config->temp1_source_select & 0x0f));
+ w83795_write(W83795_REG_T34TSS, ((config->temp4_source_select & 0x0f) << 4) | (config->temp3_source_select & 0x0f));
+ w83795_write(W83795_REG_T56TSS, ((config->temp6_source_select & 0x0f) << 4) | (config->temp5_source_select & 0x0f));
+
+ /* Set critical temperatures
+ * If any sensor exceeds the associated critical temperature,
+ * all fans will be forced to full speed.
+ */
+ w83795_write(W83795_REG_CTFS(0), config->temp1_critical_temperature);
+ w83795_write(W83795_REG_CTFS(1), config->temp2_critical_temperature);
+ w83795_write(W83795_REG_CTFS(2), config->temp3_critical_temperature);
+ w83795_write(W83795_REG_CTFS(3), config->temp4_critical_temperature);
+ w83795_write(W83795_REG_CTFS(4), config->temp5_critical_temperature);
+ w83795_write(W83795_REG_CTFS(5), config->temp6_critical_temperature);
+
+ /* Set fan control target temperatures */
+ w83795_write(W83795_REG_TTTI(0), config->temp1_target_temperature);
+ w83795_write(W83795_REG_TTTI(1), config->temp2_target_temperature);
+ w83795_write(W83795_REG_TTTI(2), config->temp3_target_temperature);
+ w83795_write(W83795_REG_TTTI(3), config->temp4_target_temperature);
+ w83795_write(W83795_REG_TTTI(4), config->temp5_target_temperature);
+ w83795_write(W83795_REG_TTTI(5), config->temp6_target_temperature);
+
+ /* Set fan stall prevention parameters */
+ w83795_write(W83795_REG_FAN_NONSTOP(0), config->fan1_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(1), config->fan2_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(2), config->fan3_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(3), config->fan4_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(4), config->fan5_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(5), config->fan6_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(6), config->fan7_nonstop);
+ w83795_write(W83795_REG_FAN_NONSTOP(7), config->fan8_nonstop);
+
+ /* Set fan default speed */
+ w83795_write(W83795_REG_DFSP, fan_pct_to_cfg_val(config->default_speed));
+
+ /* Set initial fan speeds */
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(0), fan_pct_to_cfg_val(config->fan1_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(1), fan_pct_to_cfg_val(config->fan2_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(2), fan_pct_to_cfg_val(config->fan3_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(3), fan_pct_to_cfg_val(config->fan4_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(4), fan_pct_to_cfg_val(config->fan5_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(5), fan_pct_to_cfg_val(config->fan6_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(6), fan_pct_to_cfg_val(config->fan7_duty));
+ w83795_write(W83795_REG_FAN_MANUAL_SPEED(7), fan_pct_to_cfg_val(config->fan8_duty));
+
+ /* Voltage monitor settings */
+ w83795_write(W83795_REG_VOLT_CTRL1, config->volt_ctl1);
+ w83795_write(W83795_REG_VOLT_CTRL2, config->volt_ctl2);
+
+ /* Voltage high/low limits */
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(0), millivolts_to_limit_value_type1(config->vcore1_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(0), millivolts_to_limit_value_type1(config->vcore1_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(1), millivolts_to_limit_value_type1(config->vcore2_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(1), millivolts_to_limit_value_type1(config->vcore2_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(2), millivolts_to_limit_value_type1(config->vsen3_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(2), millivolts_to_limit_value_type1(config->vsen3_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(3), millivolts_to_limit_value_type1(config->vsen4_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(3), millivolts_to_limit_value_type1(config->vsen4_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(4), millivolts_to_limit_value_type1(config->vsen5_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(4), millivolts_to_limit_value_type1(config->vsen5_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(5), millivolts_to_limit_value_type1(config->vsen6_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(5), millivolts_to_limit_value_type1(config->vsen6_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(6), millivolts_to_limit_value_type1(config->vsen7_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(6), millivolts_to_limit_value_type1(config->vsen7_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(7), millivolts_to_limit_value_type1(config->vsen8_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(7), millivolts_to_limit_value_type1(config->vsen8_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(8), millivolts_to_limit_value_type1(config->vsen9_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(8), millivolts_to_limit_value_type1(config->vsen9_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(9), millivolts_to_limit_value_type1(config->vsen10_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(9), millivolts_to_limit_value_type1(config->vsen10_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(10), millivolts_to_limit_value_type1(config->vsen11_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(10), millivolts_to_limit_value_type1(config->vsen11_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(11), millivolts_to_limit_value_type1(config->vtt_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(11), millivolts_to_limit_value_type1(config->vtt_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(12), millivolts_to_limit_value_type2(config->vdd_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(12), millivolts_to_limit_value_type2(config->vdd_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(13), millivolts_to_limit_value_type2(config->vsb_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(13), millivolts_to_limit_value_type2(config->vsb_low_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_HIGH(14), millivolts_to_limit_value_type2(config->vbat_high_limit_mv));
+ w83795_write(W83795_REG_VOLT_LIM_LOW(14), millivolts_to_limit_value_type2(config->vbat_low_limit_mv));
+
+ /* VSEN12 limits */
+ if (config->temp_ctl1 & 0x2) {
+ limit_value = millivolts_to_limit_value_type3(config->vsen12_high_limit_mv);
+ w83795_write(W83795_REG_VOLT_LIM_HIGH_2_M(4), limit_value >> 2);
+ w83795_write(W83795_REG_VOLT_LIM_HIGH_2_L(4), limit_value & 0x3);
+ limit_value = millivolts_to_limit_value_type3(config->vsen12_low_limit_mv);
+ w83795_write(W83795_REG_VOLT_LIM_LOW_2_M(4), limit_value >> 2);
+ w83795_write(W83795_REG_VOLT_LIM_LOW_2_L(4), limit_value & 0x3);
+ }
+
+ /* VSEN13 limits */
+ if (config->temp_ctl1 & 0x8) {
+ limit_value = millivolts_to_limit_value_type3(config->vsen13_high_limit_mv);
+ w83795_write(W83795_REG_VOLT_LIM_HIGH_2_M(5), limit_value >> 2);
+ w83795_write(W83795_REG_VOLT_LIM_HIGH_2_L(5), limit_value & 0x3);
+ limit_value = millivolts_to_limit_value_type3(config->vsen13_low_limit_mv);
+ w83795_write(W83795_REG_VOLT_LIM_LOW_2_M(5), limit_value >> 2);
+ w83795_write(W83795_REG_VOLT_LIM_LOW_2_L(5), limit_value & 0x3);
+ }
+
+ w83795_set_fan(mode);
+
+ /* Show current fan control settings */
+ printk(BIOS_INFO, "Fan\tCTFS(celsius)\tTTTI(celsius)\n");
+ for (i = 0; i < 6; i++) {
+ val = w83795_read(W83795_REG_CTFS(i));
+ printk(BIOS_INFO, " %x\t%d", i + 1, val);
+ val = w83795_read(W83795_REG_TTTI(i));
+ printk(BIOS_INFO, "\t%d\n", val);
+ }
+
+ /* Show current temperatures */
+ for (i = 0; i < 8; i++) {
+ val = w83795_read(W83795_REG_DTS(i));
+ printk(BIOS_DEBUG, "DTS%x current value: %x\n", i + 1, val);
+ }
+
+ /* Start monitoring / fan control */
+ val = w83795_read(W83795_REG_CONFIG);
+ val |= W83795_REG_CONFIG_START;
+ w83795_write(W83795_REG_CONFIG, val);
+}
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