| // SPDX-License-Identifier: GPL-2.0 |
| |
| #include <linux/device.h> |
| #include <linux/hwmon.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/jiffies.h> |
| #include <linux/kernel.h> |
| #include <linux/math64.h> |
| #include <linux/mutex.h> |
| #include <linux/sysfs.h> |
| #include <asm/unaligned.h> |
| |
| #include "common.h" |
| |
| #define EXTN_FLAG_SENSOR_ID BIT(7) |
| |
| #define OCC_UPDATE_FREQUENCY msecs_to_jiffies(1000) |
| |
| #define OCC_TEMP_SENSOR_FAULT 0xFF |
| |
| #define OCC_FRU_TYPE_VRM 3 |
| |
| /* OCC sensor type and version definitions */ |
| |
| struct temp_sensor_1 { |
| u16 sensor_id; |
| u16 value; |
| } __packed; |
| |
| struct temp_sensor_2 { |
| u32 sensor_id; |
| u8 fru_type; |
| u8 value; |
| } __packed; |
| |
| struct freq_sensor_1 { |
| u16 sensor_id; |
| u16 value; |
| } __packed; |
| |
| struct freq_sensor_2 { |
| u32 sensor_id; |
| u16 value; |
| } __packed; |
| |
| struct power_sensor_1 { |
| u16 sensor_id; |
| u32 update_tag; |
| u32 accumulator; |
| u16 value; |
| } __packed; |
| |
| struct power_sensor_2 { |
| u32 sensor_id; |
| u8 function_id; |
| u8 apss_channel; |
| u16 reserved; |
| u32 update_tag; |
| u64 accumulator; |
| u16 value; |
| } __packed; |
| |
| struct power_sensor_data { |
| u16 value; |
| u32 update_tag; |
| u64 accumulator; |
| } __packed; |
| |
| struct power_sensor_data_and_time { |
| u16 update_time; |
| u16 value; |
| u32 update_tag; |
| u64 accumulator; |
| } __packed; |
| |
| struct power_sensor_a0 { |
| u32 sensor_id; |
| struct power_sensor_data_and_time system; |
| u32 reserved; |
| struct power_sensor_data_and_time proc; |
| struct power_sensor_data vdd; |
| struct power_sensor_data vdn; |
| } __packed; |
| |
| struct caps_sensor_2 { |
| u16 cap; |
| u16 system_power; |
| u16 n_cap; |
| u16 max; |
| u16 min; |
| u16 user; |
| u8 user_source; |
| } __packed; |
| |
| struct caps_sensor_3 { |
| u16 cap; |
| u16 system_power; |
| u16 n_cap; |
| u16 max; |
| u16 hard_min; |
| u16 soft_min; |
| u16 user; |
| u8 user_source; |
| } __packed; |
| |
| struct extended_sensor { |
| union { |
| u8 name[4]; |
| u32 sensor_id; |
| }; |
| u8 flags; |
| u8 reserved; |
| u8 data[6]; |
| } __packed; |
| |
| static int occ_poll(struct occ *occ) |
| { |
| u16 checksum = occ->poll_cmd_data + 1; |
| u8 cmd[8]; |
| |
| /* big endian */ |
| cmd[0] = 0; /* sequence number */ |
| cmd[1] = 0; /* cmd type */ |
| cmd[2] = 0; /* data length msb */ |
| cmd[3] = 1; /* data length lsb */ |
| cmd[4] = occ->poll_cmd_data; /* data */ |
| cmd[5] = checksum >> 8; /* checksum msb */ |
| cmd[6] = checksum & 0xFF; /* checksum lsb */ |
| cmd[7] = 0; |
| |
| /* mutex should already be locked if necessary */ |
| return occ->send_cmd(occ, cmd); |
| } |
| |
| static int occ_set_user_power_cap(struct occ *occ, u16 user_power_cap) |
| { |
| int rc; |
| u8 cmd[8]; |
| u16 checksum = 0x24; |
| __be16 user_power_cap_be = cpu_to_be16(user_power_cap); |
| |
| cmd[0] = 0; |
| cmd[1] = 0x22; |
| cmd[2] = 0; |
| cmd[3] = 2; |
| |
| memcpy(&cmd[4], &user_power_cap_be, 2); |
| |
| checksum += cmd[4] + cmd[5]; |
| cmd[6] = checksum >> 8; |
| cmd[7] = checksum & 0xFF; |
| |
| rc = mutex_lock_interruptible(&occ->lock); |
| if (rc) |
| return rc; |
| |
| rc = occ->send_cmd(occ, cmd); |
| |
| mutex_unlock(&occ->lock); |
| |
| return rc; |
| } |
| |
| static int occ_update_response(struct occ *occ) |
| { |
| int rc = mutex_lock_interruptible(&occ->lock); |
| |
| if (rc) |
| return rc; |
| |
| /* limit the maximum rate of polling the OCC */ |
| if (time_after(jiffies, occ->last_update + OCC_UPDATE_FREQUENCY)) { |
| rc = occ_poll(occ); |
| occ->last_update = jiffies; |
| } |
| |
| mutex_unlock(&occ->lock); |
| return rc; |
| } |
| |
| static ssize_t occ_show_temp_1(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u32 val = 0; |
| struct temp_sensor_1 *temp; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| temp = ((struct temp_sensor_1 *)sensors->temp.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| val = get_unaligned_be16(&temp->sensor_id); |
| break; |
| case 1: |
| val = get_unaligned_be16(&temp->value) * 1000; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%u\n", val); |
| } |
| |
| static ssize_t occ_show_temp_2(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u32 val = 0; |
| struct temp_sensor_2 *temp; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| temp = ((struct temp_sensor_2 *)sensors->temp.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| val = get_unaligned_be32(&temp->sensor_id); |
| break; |
| case 1: |
| val = temp->value; |
| if (val == OCC_TEMP_SENSOR_FAULT) |
| return -EREMOTEIO; |
| |
| /* |
| * VRM doesn't return temperature, only alarm bit. This |
| * attribute maps to tempX_alarm instead of tempX_input for |
| * VRM |
| */ |
| if (temp->fru_type != OCC_FRU_TYPE_VRM) { |
| /* sensor not ready */ |
| if (val == 0) |
| return -EAGAIN; |
| |
| val *= 1000; |
| } |
| break; |
| case 2: |
| val = temp->fru_type; |
| break; |
| case 3: |
| val = temp->value == OCC_TEMP_SENSOR_FAULT; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%u\n", val); |
| } |
| |
| static ssize_t occ_show_freq_1(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u16 val = 0; |
| struct freq_sensor_1 *freq; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| freq = ((struct freq_sensor_1 *)sensors->freq.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| val = get_unaligned_be16(&freq->sensor_id); |
| break; |
| case 1: |
| val = get_unaligned_be16(&freq->value); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%u\n", val); |
| } |
| |
| static ssize_t occ_show_freq_2(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u32 val = 0; |
| struct freq_sensor_2 *freq; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| freq = ((struct freq_sensor_2 *)sensors->freq.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| val = get_unaligned_be32(&freq->sensor_id); |
| break; |
| case 1: |
| val = get_unaligned_be16(&freq->value); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%u\n", val); |
| } |
| |
| static ssize_t occ_show_power_1(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u64 val = 0; |
| struct power_sensor_1 *power; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| power = ((struct power_sensor_1 *)sensors->power.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| val = get_unaligned_be16(&power->sensor_id); |
| break; |
| case 1: |
| val = get_unaligned_be32(&power->accumulator) / |
| get_unaligned_be32(&power->update_tag); |
| val *= 1000000ULL; |
| break; |
| case 2: |
| val = get_unaligned_be32(&power->update_tag) * |
| occ->powr_sample_time_us; |
| break; |
| case 3: |
| val = get_unaligned_be16(&power->value) * 1000000ULL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%llu\n", val); |
| } |
| |
| static u64 occ_get_powr_avg(u64 *accum, u32 *samples) |
| { |
| return div64_u64(get_unaligned_be64(accum) * 1000000ULL, |
| get_unaligned_be32(samples)); |
| } |
| |
| static ssize_t occ_show_power_2(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u64 val = 0; |
| struct power_sensor_2 *power; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| power = ((struct power_sensor_2 *)sensors->power.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| return snprintf(buf, PAGE_SIZE - 1, "%u_%u_%u\n", |
| get_unaligned_be32(&power->sensor_id), |
| power->function_id, power->apss_channel); |
| case 1: |
| val = occ_get_powr_avg(&power->accumulator, |
| &power->update_tag); |
| break; |
| case 2: |
| val = get_unaligned_be32(&power->update_tag) * |
| occ->powr_sample_time_us; |
| break; |
| case 3: |
| val = get_unaligned_be16(&power->value) * 1000000ULL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%llu\n", val); |
| } |
| |
| static ssize_t occ_show_power_a0(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u64 val = 0; |
| struct power_sensor_a0 *power; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| power = ((struct power_sensor_a0 *)sensors->power.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| return snprintf(buf, PAGE_SIZE - 1, "%u_system\n", |
| get_unaligned_be32(&power->sensor_id)); |
| case 1: |
| val = occ_get_powr_avg(&power->system.accumulator, |
| &power->system.update_tag); |
| break; |
| case 2: |
| val = get_unaligned_be32(&power->system.update_tag) * |
| occ->powr_sample_time_us; |
| break; |
| case 3: |
| val = get_unaligned_be16(&power->system.value) * 1000000ULL; |
| break; |
| case 4: |
| return snprintf(buf, PAGE_SIZE - 1, "%u_proc\n", |
| get_unaligned_be32(&power->sensor_id)); |
| case 5: |
| val = occ_get_powr_avg(&power->proc.accumulator, |
| &power->proc.update_tag); |
| break; |
| case 6: |
| val = get_unaligned_be32(&power->proc.update_tag) * |
| occ->powr_sample_time_us; |
| break; |
| case 7: |
| val = get_unaligned_be16(&power->proc.value) * 1000000ULL; |
| break; |
| case 8: |
| return snprintf(buf, PAGE_SIZE - 1, "%u_vdd\n", |
| get_unaligned_be32(&power->sensor_id)); |
| case 9: |
| val = occ_get_powr_avg(&power->vdd.accumulator, |
| &power->vdd.update_tag); |
| break; |
| case 10: |
| val = get_unaligned_be32(&power->vdd.update_tag) * |
| occ->powr_sample_time_us; |
| break; |
| case 11: |
| val = get_unaligned_be16(&power->vdd.value) * 1000000ULL; |
| break; |
| case 12: |
| return snprintf(buf, PAGE_SIZE - 1, "%u_vdn\n", |
| get_unaligned_be32(&power->sensor_id)); |
| case 13: |
| val = occ_get_powr_avg(&power->vdn.accumulator, |
| &power->vdn.update_tag); |
| break; |
| case 14: |
| val = get_unaligned_be32(&power->vdn.update_tag) * |
| occ->powr_sample_time_us; |
| break; |
| case 15: |
| val = get_unaligned_be16(&power->vdn.value) * 1000000ULL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%llu\n", val); |
| } |
| |
| static ssize_t occ_show_caps_1_2(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u64 val = 0; |
| struct caps_sensor_2 *caps; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| caps = ((struct caps_sensor_2 *)sensors->caps.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| return snprintf(buf, PAGE_SIZE - 1, "system\n"); |
| case 1: |
| val = get_unaligned_be16(&caps->cap) * 1000000ULL; |
| break; |
| case 2: |
| val = get_unaligned_be16(&caps->system_power) * 1000000ULL; |
| break; |
| case 3: |
| val = get_unaligned_be16(&caps->n_cap) * 1000000ULL; |
| break; |
| case 4: |
| val = get_unaligned_be16(&caps->max) * 1000000ULL; |
| break; |
| case 5: |
| val = get_unaligned_be16(&caps->min) * 1000000ULL; |
| break; |
| case 6: |
| val = get_unaligned_be16(&caps->user) * 1000000ULL; |
| break; |
| case 7: |
| if (occ->sensors.caps.version == 1) |
| return -EINVAL; |
| |
| val = caps->user_source; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%llu\n", val); |
| } |
| |
| static ssize_t occ_show_caps_3(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| u64 val = 0; |
| struct caps_sensor_3 *caps; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| caps = ((struct caps_sensor_3 *)sensors->caps.data) + sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| return snprintf(buf, PAGE_SIZE - 1, "system\n"); |
| case 1: |
| val = get_unaligned_be16(&caps->cap) * 1000000ULL; |
| break; |
| case 2: |
| val = get_unaligned_be16(&caps->system_power) * 1000000ULL; |
| break; |
| case 3: |
| val = get_unaligned_be16(&caps->n_cap) * 1000000ULL; |
| break; |
| case 4: |
| val = get_unaligned_be16(&caps->max) * 1000000ULL; |
| break; |
| case 5: |
| val = get_unaligned_be16(&caps->hard_min) * 1000000ULL; |
| break; |
| case 6: |
| val = get_unaligned_be16(&caps->user) * 1000000ULL; |
| break; |
| case 7: |
| val = caps->user_source; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return snprintf(buf, PAGE_SIZE - 1, "%llu\n", val); |
| } |
| |
| static ssize_t occ_store_caps_user(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| u16 user_power_cap; |
| unsigned long long value; |
| struct occ *occ = dev_get_drvdata(dev); |
| |
| rc = kstrtoull(buf, 0, &value); |
| if (rc) |
| return rc; |
| |
| user_power_cap = div64_u64(value, 1000000ULL); /* microwatt to watt */ |
| |
| rc = occ_set_user_power_cap(occ, user_power_cap); |
| if (rc) |
| return rc; |
| |
| return count; |
| } |
| |
| static ssize_t occ_show_extended(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| struct extended_sensor *extn; |
| struct occ *occ = dev_get_drvdata(dev); |
| struct occ_sensors *sensors = &occ->sensors; |
| struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); |
| |
| rc = occ_update_response(occ); |
| if (rc) |
| return rc; |
| |
| extn = ((struct extended_sensor *)sensors->extended.data) + |
| sattr->index; |
| |
| switch (sattr->nr) { |
| case 0: |
| if (extn->flags & EXTN_FLAG_SENSOR_ID) |
| rc = snprintf(buf, PAGE_SIZE - 1, "%u", |
| get_unaligned_be32(&extn->sensor_id)); |
| else |
| rc = snprintf(buf, PAGE_SIZE - 1, "%02x%02x%02x%02x\n", |
| extn->name[0], extn->name[1], |
| extn->name[2], extn->name[3]); |
| break; |
| case 1: |
| rc = snprintf(buf, PAGE_SIZE - 1, "%02x\n", extn->flags); |
| break; |
| case 2: |
| rc = snprintf(buf, PAGE_SIZE - 1, "%02x%02x%02x%02x%02x%02x\n", |
| extn->data[0], extn->data[1], extn->data[2], |
| extn->data[3], extn->data[4], extn->data[5]); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return rc; |
| } |
| |
| /* |
| * Some helper macros to make it easier to define an occ_attribute. Since these |
| * are dynamically allocated, we shouldn't use the existing kernel macros which |
| * stringify the name argument. |
| */ |
| #define ATTR_OCC(_name, _mode, _show, _store) { \ |
| .attr = { \ |
| .name = _name, \ |
| .mode = VERIFY_OCTAL_PERMISSIONS(_mode), \ |
| }, \ |
| .show = _show, \ |
| .store = _store, \ |
| } |
| |
| #define SENSOR_ATTR_OCC(_name, _mode, _show, _store, _nr, _index) { \ |
| .dev_attr = ATTR_OCC(_name, _mode, _show, _store), \ |
| .index = _index, \ |
| .nr = _nr, \ |
| } |
| |
| #define OCC_INIT_ATTR(_name, _mode, _show, _store, _nr, _index) \ |
| ((struct sensor_device_attribute_2) \ |
| SENSOR_ATTR_OCC(_name, _mode, _show, _store, _nr, _index)) |
| |
| /* |
| * Allocate and instatiate sensor_device_attribute_2s. It's most efficient to |
| * use our own instead of the built-in hwmon attribute types. |
| */ |
| static int occ_setup_sensor_attrs(struct occ *occ) |
| { |
| unsigned int i, s, num_attrs = 0; |
| struct device *dev = occ->bus_dev; |
| struct occ_sensors *sensors = &occ->sensors; |
| struct occ_attribute *attr; |
| struct temp_sensor_2 *temp; |
| ssize_t (*show_temp)(struct device *, struct device_attribute *, |
| char *) = occ_show_temp_1; |
| ssize_t (*show_freq)(struct device *, struct device_attribute *, |
| char *) = occ_show_freq_1; |
| ssize_t (*show_power)(struct device *, struct device_attribute *, |
| char *) = occ_show_power_1; |
| ssize_t (*show_caps)(struct device *, struct device_attribute *, |
| char *) = occ_show_caps_1_2; |
| |
| switch (sensors->temp.version) { |
| case 1: |
| num_attrs += (sensors->temp.num_sensors * 2); |
| break; |
| case 2: |
| num_attrs += (sensors->temp.num_sensors * 4); |
| show_temp = occ_show_temp_2; |
| break; |
| default: |
| sensors->temp.num_sensors = 0; |
| } |
| |
| switch (sensors->freq.version) { |
| case 2: |
| show_freq = occ_show_freq_2; |
| /* fall through */ |
| case 1: |
| num_attrs += (sensors->freq.num_sensors * 2); |
| break; |
| default: |
| sensors->freq.num_sensors = 0; |
| } |
| |
| switch (sensors->power.version) { |
| case 2: |
| show_power = occ_show_power_2; |
| /* fall through */ |
| case 1: |
| num_attrs += (sensors->power.num_sensors * 4); |
| break; |
| case 0xA0: |
| num_attrs += (sensors->power.num_sensors * 16); |
| show_power = occ_show_power_a0; |
| break; |
| default: |
| sensors->power.num_sensors = 0; |
| } |
| |
| switch (sensors->caps.version) { |
| case 1: |
| num_attrs += (sensors->caps.num_sensors * 7); |
| break; |
| case 3: |
| show_caps = occ_show_caps_3; |
| /* fall through */ |
| case 2: |
| num_attrs += (sensors->caps.num_sensors * 8); |
| break; |
| default: |
| sensors->caps.num_sensors = 0; |
| } |
| |
| switch (sensors->extended.version) { |
| case 1: |
| num_attrs += (sensors->extended.num_sensors * 3); |
| break; |
| default: |
| sensors->extended.num_sensors = 0; |
| } |
| |
| occ->attrs = devm_kzalloc(dev, sizeof(*occ->attrs) * num_attrs, |
| GFP_KERNEL); |
| if (!occ->attrs) |
| return -ENOMEM; |
| |
| /* null-terminated list */ |
| occ->group.attrs = devm_kzalloc(dev, sizeof(*occ->group.attrs) * |
| num_attrs + 1, GFP_KERNEL); |
| if (!occ->group.attrs) |
| return -ENOMEM; |
| |
| attr = occ->attrs; |
| |
| for (i = 0; i < sensors->temp.num_sensors; ++i) { |
| s = i + 1; |
| temp = ((struct temp_sensor_2 *)sensors->temp.data) + i; |
| |
| snprintf(attr->name, sizeof(attr->name), "temp%d_label", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_temp, NULL, |
| 0, i); |
| attr++; |
| |
| if (sensors->temp.version > 1 && |
| temp->fru_type == OCC_FRU_TYPE_VRM) { |
| snprintf(attr->name, sizeof(attr->name), |
| "temp%d_alarm", s); |
| } else { |
| snprintf(attr->name, sizeof(attr->name), |
| "temp%d_input", s); |
| } |
| |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_temp, NULL, |
| 1, i); |
| attr++; |
| |
| if (sensors->temp.version > 1) { |
| snprintf(attr->name, sizeof(attr->name), |
| "temp%d_fru_type", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_temp, NULL, 2, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "temp%d_fault", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_temp, NULL, 3, i); |
| attr++; |
| } |
| } |
| |
| for (i = 0; i < sensors->freq.num_sensors; ++i) { |
| s = i + 1; |
| |
| snprintf(attr->name, sizeof(attr->name), "freq%d_label", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_freq, NULL, |
| 0, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "freq%d_input", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_freq, NULL, |
| 1, i); |
| attr++; |
| } |
| |
| if (sensors->power.version == 0xA0) { |
| /* |
| * Special case for many-attribute power sensor. Split it into |
| * a sensor number per power type, emulating several sensors. |
| */ |
| for (i = 0; i < sensors->power.num_sensors; ++i) { |
| unsigned int j; |
| unsigned int nr = 0; |
| |
| s = (i * 4) + 1; |
| |
| for (j = 0; j < 4; ++j) { |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_label", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, |
| nr++, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_average", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, |
| nr++, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_average_interval", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, |
| nr++, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_input", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, |
| nr++, i); |
| attr++; |
| |
| s++; |
| } |
| } |
| } else { |
| for (i = 0; i < sensors->power.num_sensors; ++i) { |
| s = i + 1; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_label", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, 0, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_average", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, 1, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_average_interval", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, 2, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_input", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_power, NULL, 3, i); |
| attr++; |
| } |
| } |
| |
| if (sensors->caps.num_sensors >= 1) { |
| s = sensors->power.num_sensors + 1; |
| |
| snprintf(attr->name, sizeof(attr->name), "power%d_label", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, |
| 0, 0); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "power%d_cap", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, |
| 1, 0); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "power%d_input", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, |
| 2, 0); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_cap_not_redundant", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, |
| 3, 0); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "power%d_cap_max", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, |
| 4, 0); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "power%d_cap_min", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, |
| 5, 0); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "power%d_cap_user", |
| s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0644, show_caps, |
| occ_store_caps_user, 6, 0); |
| attr++; |
| |
| if (sensors->caps.version > 1) { |
| snprintf(attr->name, sizeof(attr->name), |
| "power%d_cap_user_source", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| show_caps, NULL, 7, 0); |
| attr++; |
| } |
| } |
| |
| for (i = 0; i < sensors->extended.num_sensors; ++i) { |
| s = i + 1; |
| |
| snprintf(attr->name, sizeof(attr->name), "extn%d_label", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| occ_show_extended, NULL, 0, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "extn%d_flags", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| occ_show_extended, NULL, 1, i); |
| attr++; |
| |
| snprintf(attr->name, sizeof(attr->name), "extn%d_input", s); |
| attr->sensor = OCC_INIT_ATTR(attr->name, 0444, |
| occ_show_extended, NULL, 2, i); |
| attr++; |
| } |
| |
| /* put the sensors in the group */ |
| for (i = 0; i < num_attrs; ++i) { |
| sysfs_attr_init(&occ->attrs[i].sensor.dev_attr.attr); |
| occ->group.attrs[i] = &occ->attrs[i].sensor.dev_attr.attr; |
| } |
| |
| return 0; |
| } |
| |
| /* only need to do this once at startup, as OCC won't change sensors on us */ |
| static void occ_parse_poll_response(struct occ *occ) |
| { |
| unsigned int i, old_offset, offset = 0, size = 0; |
| struct occ_sensor *sensor; |
| struct occ_sensors *sensors = &occ->sensors; |
| struct occ_response *resp = &occ->resp; |
| struct occ_poll_response *poll = |
| (struct occ_poll_response *)&resp->data[0]; |
| struct occ_poll_response_header *header = &poll->header; |
| struct occ_sensor_data_block *block = &poll->block; |
| |
| dev_info(occ->bus_dev, "OCC found, code level: %.16s\n", |
| header->occ_code_level); |
| |
| for (i = 0; i < header->num_sensor_data_blocks; ++i) { |
| block = (struct occ_sensor_data_block *)((u8 *)block + offset); |
| old_offset = offset; |
| offset = (block->header.num_sensors * |
| block->header.sensor_length) + sizeof(block->header); |
| size += offset; |
| |
| /* validate all the length/size fields */ |
| if ((size + sizeof(*header)) >= OCC_RESP_DATA_BYTES) { |
| dev_warn(occ->bus_dev, "exceeded response buffer\n"); |
| return; |
| } |
| |
| dev_dbg(occ->bus_dev, " %04x..%04x: %.4s (%d sensors)\n", |
| old_offset, offset - 1, block->header.eye_catcher, |
| block->header.num_sensors); |
| |
| /* match sensor block type */ |
| if (strncmp(block->header.eye_catcher, "TEMP", 4) == 0) |
| sensor = &sensors->temp; |
| else if (strncmp(block->header.eye_catcher, "FREQ", 4) == 0) |
| sensor = &sensors->freq; |
| else if (strncmp(block->header.eye_catcher, "POWR", 4) == 0) |
| sensor = &sensors->power; |
| else if (strncmp(block->header.eye_catcher, "CAPS", 4) == 0) |
| sensor = &sensors->caps; |
| else if (strncmp(block->header.eye_catcher, "EXTN", 4) == 0) |
| sensor = &sensors->extended; |
| else { |
| dev_warn(occ->bus_dev, "sensor not supported %.4s\n", |
| block->header.eye_catcher); |
| continue; |
| } |
| |
| sensor->num_sensors = block->header.num_sensors; |
| sensor->version = block->header.sensor_format; |
| sensor->data = &block->data; |
| } |
| |
| dev_dbg(occ->bus_dev, "Max resp size: %u+%zd=%zd\n", size, |
| sizeof(*header), size + sizeof(*header)); |
| } |
| |
| int occ_setup(struct occ *occ, const char *name) |
| { |
| int rc; |
| |
| mutex_init(&occ->lock); |
| occ->groups[0] = &occ->group; |
| |
| /* no need to lock */ |
| rc = occ_poll(occ); |
| if (rc == -ESHUTDOWN) { |
| dev_info(occ->bus_dev, "host is not ready\n"); |
| return rc; |
| } else if (rc < 0) { |
| dev_err(occ->bus_dev, "failed to get OCC poll response: %d\n", |
| rc); |
| return rc; |
| } |
| |
| occ_parse_poll_response(occ); |
| |
| rc = occ_setup_sensor_attrs(occ); |
| if (rc) { |
| dev_err(occ->bus_dev, "failed to setup sensor attrs: %d\n", |
| rc); |
| return rc; |
| } |
| |
| occ->hwmon = devm_hwmon_device_register_with_groups(occ->bus_dev, name, |
| occ, occ->groups); |
| if (IS_ERR(occ->hwmon)) { |
| rc = PTR_ERR(occ->hwmon); |
| dev_err(occ->bus_dev, "failed to register hwmon device: %d\n", |
| rc); |
| return rc; |
| } |
| |
| return 0; |
| } |