diff options
Diffstat (limited to 'drivers/hwmon/pmbus/adm1275.c')
| -rw-r--r-- | drivers/hwmon/pmbus/adm1275.c | 314 |
1 files changed, 260 insertions, 54 deletions
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c index c936e278230..60aad9570f0 100644 --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -23,6 +23,8 @@ #include <linux/i2c.h> #include "pmbus.h" +enum chips { adm1075, adm1275, adm1276 }; + #define ADM1275_PEAK_IOUT 0xd0 #define ADM1275_PEAK_VIN 0xd1 #define ADM1275_PEAK_VOUT 0xd2 @@ -30,15 +32,82 @@ #define ADM1275_VIN_VOUT_SELECT (1 << 6) #define ADM1275_VRANGE (1 << 5) +#define ADM1075_IRANGE_50 (1 << 4) +#define ADM1075_IRANGE_25 (1 << 3) +#define ADM1075_IRANGE_MASK ((1 << 3) | (1 << 4)) + +#define ADM1275_IOUT_WARN2_LIMIT 0xd7 +#define ADM1275_DEVICE_CONFIG 0xd8 + +#define ADM1275_IOUT_WARN2_SELECT (1 << 4) + +#define ADM1276_PEAK_PIN 0xda + +#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0) + +#define ADM1075_READ_VAUX 0xdd +#define ADM1075_VAUX_OV_WARN_LIMIT 0xde +#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf +#define ADM1075_VAUX_STATUS 0xf6 + +#define ADM1075_VAUX_OV_WARN (1<<7) +#define ADM1075_VAUX_UV_WARN (1<<6) + +struct adm1275_data { + int id; + bool have_oc_fault; + struct pmbus_driver_info info; +}; + +#define to_adm1275_data(x) container_of(x, struct adm1275_data, info) static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) { - int ret; + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + const struct adm1275_data *data = to_adm1275_data(info); + int ret = 0; if (page) - return -EINVAL; + return -ENXIO; switch (reg) { + case PMBUS_IOUT_UC_FAULT_LIMIT: + if (data->have_oc_fault) { + ret = -ENXIO; + break; + } + ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); + break; + case PMBUS_IOUT_OC_FAULT_LIMIT: + if (!data->have_oc_fault) { + ret = -ENXIO; + break; + } + ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); + break; + case PMBUS_VOUT_OV_WARN_LIMIT: + if (data->id != adm1075) { + ret = -ENODATA; + break; + } + ret = pmbus_read_word_data(client, 0, + ADM1075_VAUX_OV_WARN_LIMIT); + break; + case PMBUS_VOUT_UV_WARN_LIMIT: + if (data->id != adm1075) { + ret = -ENODATA; + break; + } + ret = pmbus_read_word_data(client, 0, + ADM1075_VAUX_UV_WARN_LIMIT); + break; + case PMBUS_READ_VOUT: + if (data->id != adm1075) { + ret = -ENODATA; + break; + } + ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX); + break; case PMBUS_VIRT_READ_IOUT_MAX: ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT); break; @@ -48,10 +117,20 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) case PMBUS_VIRT_READ_VIN_MAX: ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN); break; + case PMBUS_VIRT_READ_PIN_MAX: + if (data->id == adm1275) { + ret = -ENXIO; + break; + } + ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN); + break; case PMBUS_VIRT_RESET_IOUT_HISTORY: case PMBUS_VIRT_RESET_VOUT_HISTORY: case PMBUS_VIRT_RESET_VIN_HISTORY: - ret = 0; + break; + case PMBUS_VIRT_RESET_PIN_HISTORY: + if (data->id == adm1275) + ret = -ENXIO; break; default: ret = -ENODATA; @@ -66,9 +145,14 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, int ret; if (page) - return -EINVAL; + return -ENXIO; switch (reg) { + case PMBUS_IOUT_UC_FAULT_LIMIT: + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, + word); + break; case PMBUS_VIRT_RESET_IOUT_HISTORY: ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); break; @@ -78,6 +162,9 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, case PMBUS_VIRT_RESET_VIN_HISTORY: ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); break; + case PMBUS_VIRT_RESET_PIN_HISTORY: + ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); + break; default: ret = -ENODATA; break; @@ -85,26 +172,119 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, return ret; } +static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + const struct adm1275_data *data = to_adm1275_data(info); + int mfr_status, ret; + + if (page > 0) + return -ENXIO; + + switch (reg) { + case PMBUS_STATUS_IOUT: + ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); + if (ret < 0) + break; + mfr_status = pmbus_read_byte_data(client, page, + PMBUS_STATUS_MFR_SPECIFIC); + if (mfr_status < 0) { + ret = mfr_status; + break; + } + if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { + ret |= data->have_oc_fault ? + PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; + } + break; + case PMBUS_STATUS_VOUT: + if (data->id != adm1075) { + ret = -ENODATA; + break; + } + ret = 0; + mfr_status = pmbus_read_byte_data(client, 0, + ADM1075_VAUX_STATUS); + if (mfr_status & ADM1075_VAUX_OV_WARN) + ret |= PB_VOLTAGE_OV_WARNING; + if (mfr_status & ADM1075_VAUX_UV_WARN) + ret |= PB_VOLTAGE_UV_WARNING; + break; + default: + ret = -ENODATA; + break; + } + return ret; +} + +static const struct i2c_device_id adm1275_id[] = { + { "adm1075", adm1075 }, + { "adm1275", adm1275 }, + { "adm1276", adm1276 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adm1275_id); + static int adm1275_probe(struct i2c_client *client, const struct i2c_device_id *id) { - int config; + u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; + int config, device_config; int ret; struct pmbus_driver_info *info; + struct adm1275_data *data; + const struct i2c_device_id *mid; if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_BYTE_DATA)) + I2C_FUNC_SMBUS_READ_BYTE_DATA + | I2C_FUNC_SMBUS_BLOCK_DATA)) return -ENODEV; - info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL); - if (!info) - return -ENOMEM; + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); + if (ret < 0) { + dev_err(&client->dev, "Failed to read Manufacturer ID\n"); + return ret; + } + if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { + dev_err(&client->dev, "Unsupported Manufacturer ID\n"); + return -ENODEV; + } - config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); - if (config < 0) { - ret = config; - goto err_mem; + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); + if (ret < 0) { + dev_err(&client->dev, "Failed to read Manufacturer Model\n"); + return ret; + } + for (mid = adm1275_id; mid->name[0]; mid++) { + if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) + break; } + if (!mid->name[0]) { + dev_err(&client->dev, "Unsupported device\n"); + return -ENODEV; + } + + if (id->driver_data != mid->driver_data) + dev_notice(&client->dev, + "Device mismatch: Configured %s, detected %s\n", + id->name, mid->name); + + config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); + if (config < 0) + return config; + + device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG); + if (device_config < 0) + return device_config; + + data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->id = mid->driver_data; + + info = &data->info; info->pages = 1; info->format[PSC_VOLTAGE_IN] = direct; @@ -116,9 +296,17 @@ static int adm1275_probe(struct i2c_client *client, info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; info->read_word_data = adm1275_read_word_data; + info->read_byte_data = adm1275_read_byte_data; info->write_word_data = adm1275_write_word_data; - if (config & ADM1275_VRANGE) { + if (data->id == adm1075) { + info->m[PSC_VOLTAGE_IN] = 27169; + info->b[PSC_VOLTAGE_IN] = 0; + info->R[PSC_VOLTAGE_IN] = -1; + info->m[PSC_VOLTAGE_OUT] = 27169; + info->b[PSC_VOLTAGE_OUT] = 0; + info->R[PSC_VOLTAGE_OUT] = -1; + } else if (config & ADM1275_VRANGE) { info->m[PSC_VOLTAGE_IN] = 19199; info->b[PSC_VOLTAGE_IN] = 0; info->R[PSC_VOLTAGE_IN] = -2; @@ -134,58 +322,76 @@ static int adm1275_probe(struct i2c_client *client, info->R[PSC_VOLTAGE_OUT] = -1; } - if (config & ADM1275_VIN_VOUT_SELECT) - info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; - else - info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; - - ret = pmbus_do_probe(client, id, info); - if (ret) - goto err_mem; - return 0; + if (device_config & ADM1275_IOUT_WARN2_SELECT) + data->have_oc_fault = true; -err_mem: - kfree(info); - return ret; -} - -static int adm1275_remove(struct i2c_client *client) -{ - const struct pmbus_driver_info *info = pmbus_get_driver_info(client); - int ret; + switch (data->id) { + case adm1075: + info->format[PSC_POWER] = direct; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -1; + switch (config & ADM1075_IRANGE_MASK) { + case ADM1075_IRANGE_25: + info->m[PSC_POWER] = 8549; + info->m[PSC_CURRENT_OUT] = 806; + break; + case ADM1075_IRANGE_50: + info->m[PSC_POWER] = 4279; + info->m[PSC_CURRENT_OUT] = 404; + break; + default: + dev_err(&client->dev, "Invalid input current range"); + info->m[PSC_POWER] = 0; + info->m[PSC_CURRENT_OUT] = 0; + break; + } + info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN + | PMBUS_HAVE_STATUS_INPUT; + if (config & ADM1275_VIN_VOUT_SELECT) + info->func[0] |= + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; + break; + case adm1275: + if (config & ADM1275_VIN_VOUT_SELECT) + info->func[0] |= + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; + else + info->func[0] |= + PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; + break; + case adm1276: + info->format[PSC_POWER] = direct; + info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN + | PMBUS_HAVE_STATUS_INPUT; + if (config & ADM1275_VIN_VOUT_SELECT) + info->func[0] |= + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; + if (config & ADM1275_VRANGE) { + info->m[PSC_POWER] = 6043; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -2; + } else { + info->m[PSC_POWER] = 2115; + info->b[PSC_POWER] = 0; + info->R[PSC_POWER] = -1; + } + break; + } - ret = pmbus_do_remove(client); - kfree(info); - return ret; + return pmbus_do_probe(client, id, info); } -static const struct i2c_device_id adm1275_id[] = { - {"adm1275", 0}, - { } -}; -MODULE_DEVICE_TABLE(i2c, adm1275_id); - static struct i2c_driver adm1275_driver = { .driver = { .name = "adm1275", }, .probe = adm1275_probe, - .remove = adm1275_remove, + .remove = pmbus_do_remove, .id_table = adm1275_id, }; -static int __init adm1275_init(void) -{ - return i2c_add_driver(&adm1275_driver); -} - -static void __exit adm1275_exit(void) -{ - i2c_del_driver(&adm1275_driver); -} +module_i2c_driver(adm1275_driver); MODULE_AUTHOR("Guenter Roeck"); -MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275"); +MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); MODULE_LICENSE("GPL"); -module_init(adm1275_init); -module_exit(adm1275_exit); |