diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/ibm-cffps.c | 272 |
1 files changed, 118 insertions, 154 deletions
diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c index e3294a1a54bb..76e72e9acda7 100644 --- a/drivers/hwmon/pmbus/ibm-cffps.c +++ b/drivers/hwmon/pmbus/ibm-cffps.c @@ -18,12 +18,6 @@ #include "pmbus.h" -#define CFFPS_MFG_ID_CMD 0x99 -#define CFFPS_FRU_CMD 0x9A -#define CFFPS_PN_CMD 0x9B -#define CFFPS_HEADER_CMD 0x9C -#define CFFPS_SN_CMD 0x9E -#define CFFPS_MAX_POWER_OUT_CMD 0xA7 #define CFFPS_CCIN_CMD 0xBD #define CFFPS_FW_CMD 0xFA #define CFFPS1_FW_NUM_BYTES 4 @@ -32,7 +26,7 @@ #define CFFPS_12VCS_VOUT_CMD 0xDE #define CFFPS_INPUT_HISTORY_CMD 0xD6 -#define CFFPS_INPUT_HISTORY_SIZE 100 +#define CFFPS_INPUT_HISTORY_SIZE 101 #define CFFPS_CCIN_REVISION GENMASK(7, 0) #define CFFPS_CCIN_REVISION_LEGACY 0xde @@ -57,13 +51,7 @@ #define CFFPS_BLINK_RATE_MS 250 enum { - CFFPS_DEBUGFS_INPUT_HISTORY = 0, - CFFPS_DEBUGFS_MFG_ID, - CFFPS_DEBUGFS_FRU, - CFFPS_DEBUGFS_PN, - CFFPS_DEBUGFS_HEADER, - CFFPS_DEBUGFS_SN, - CFFPS_DEBUGFS_MAX_POWER_OUT, + CFFPS_DEBUGFS_MAX_POWER_OUT = 0, CFFPS_DEBUGFS_CCIN, CFFPS_DEBUGFS_FW, CFFPS_DEBUGFS_ON_OFF_CONFIG, @@ -72,19 +60,11 @@ enum { enum versions { cffps1, cffps2, cffps_unknown }; -struct ibm_cffps_input_history { - struct mutex update_lock; - unsigned long last_update; - - u8 byte_count; - u8 data[CFFPS_INPUT_HISTORY_SIZE]; -}; - struct ibm_cffps { enum versions version; struct i2c_client *client; - struct ibm_cffps_input_history input_history; + u8 input_history[CFFPS_INPUT_HISTORY_SIZE]; int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES]; @@ -93,118 +73,98 @@ struct ibm_cffps { struct led_classdev led; }; -static const struct i2c_device_id ibm_cffps_id[]; - #define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)]) -static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu, - char __user *buf, size_t count, - loff_t *ppos) +static ssize_t ibm_cffps_debugfs_read_input_history(struct file *file, char __user *buf, + size_t count, loff_t *ppos) { int rc; - u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD }; - u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 }; + u8 cmd = CFFPS_INPUT_HISTORY_CMD; + struct ibm_cffps *psu = file->private_data; struct i2c_msg msg[2] = { { .addr = psu->client->addr, .flags = psu->client->flags, .len = 1, - .buf = msgbuf0, + .buf = &cmd, }, { .addr = psu->client->addr, .flags = psu->client->flags | I2C_M_RD, - .len = CFFPS_INPUT_HISTORY_SIZE + 1, - .buf = msgbuf1, + .len = CFFPS_INPUT_HISTORY_SIZE, + .buf = psu->input_history, }, }; if (!*ppos) { - mutex_lock(&psu->input_history.update_lock); - if (time_after(jiffies, psu->input_history.last_update + HZ)) { - /* - * Use a raw i2c transfer, since we need more bytes - * than Linux I2C supports through smbus xfr (only 32). - */ - rc = i2c_transfer(psu->client->adapter, msg, 2); - if (rc < 0) { - mutex_unlock(&psu->input_history.update_lock); - return rc; - } + rc = pmbus_lock_interruptible(psu->client); + if (rc) + return rc; - psu->input_history.byte_count = msgbuf1[0]; - memcpy(psu->input_history.data, &msgbuf1[1], - CFFPS_INPUT_HISTORY_SIZE); - psu->input_history.last_update = jiffies; + rc = pmbus_set_page(psu->client, 0, 0xff); + if (rc) { + pmbus_unlock(psu->client); + return rc; } - mutex_unlock(&psu->input_history.update_lock); + /* + * Use a raw i2c transfer, since we need more bytes + * than Linux I2C supports through smbus xfr (only 32). + */ + rc = i2c_transfer(psu->client->adapter, msg, 2); + pmbus_unlock(psu->client); + if (rc < 0) + return rc; } return simple_read_from_buffer(buf, count, ppos, - psu->input_history.data, - psu->input_history.byte_count); + psu->input_history + 1, + psu->input_history[0]); } +static const struct file_operations ibm_cffps_input_history_fops = { + .llseek = noop_llseek, + .read = ibm_cffps_debugfs_read_input_history, + .open = simple_open, +}; + static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { - u8 cmd; int i, rc; int *idxp = file->private_data; int idx = *idxp; struct ibm_cffps *psu = to_psu(idxp, idx); char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; - pmbus_set_page(psu->client, 0, 0xff); + rc = pmbus_lock_interruptible(psu->client); + if (rc) + return rc; + + rc = pmbus_set_page(psu->client, 0, 0xff); + if (rc) + goto unlock; switch (idx) { - case CFFPS_DEBUGFS_INPUT_HISTORY: - return ibm_cffps_read_input_history(psu, buf, count, ppos); - case CFFPS_DEBUGFS_MFG_ID: - cmd = CFFPS_MFG_ID_CMD; - break; - case CFFPS_DEBUGFS_FRU: - cmd = CFFPS_FRU_CMD; - break; - case CFFPS_DEBUGFS_PN: - cmd = CFFPS_PN_CMD; - break; - case CFFPS_DEBUGFS_HEADER: - cmd = CFFPS_HEADER_CMD; - break; - case CFFPS_DEBUGFS_SN: - cmd = CFFPS_SN_CMD; - break; case CFFPS_DEBUGFS_MAX_POWER_OUT: - if (psu->version == cffps1) { - rc = i2c_smbus_read_word_swapped(psu->client, - CFFPS_MAX_POWER_OUT_CMD); - } else { - rc = i2c_smbus_read_word_data(psu->client, - CFFPS_MAX_POWER_OUT_CMD); - } - - if (rc < 0) - return rc; - - rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc); - goto done; + if (psu->version == cffps1) + rc = i2c_smbus_read_word_swapped(psu->client, PMBUS_MFR_POUT_MAX); + else + rc = i2c_smbus_read_word_data(psu->client, PMBUS_MFR_POUT_MAX); + if (rc >= 0) + rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc); + break; case CFFPS_DEBUGFS_CCIN: rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD); - if (rc < 0) - return rc; - - rc = snprintf(data, 5, "%04X", rc); - goto done; + if (rc >= 0) + rc = snprintf(data, 5, "%04X", rc); + break; case CFFPS_DEBUGFS_FW: switch (psu->version) { case cffps1: for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) { - rc = i2c_smbus_read_byte_data(psu->client, - CFFPS_FW_CMD + - i); + rc = i2c_smbus_read_byte_data(psu->client, CFFPS_FW_CMD + i); if (rc < 0) - return rc; + goto unlock; snprintf(&data[i * 2], 3, "%02X", rc); } @@ -213,11 +173,9 @@ static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf, break; case cffps2: for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) { - rc = i2c_smbus_read_word_data(psu->client, - CFFPS_FW_CMD + - i); + rc = i2c_smbus_read_word_data(psu->client, CFFPS_FW_CMD + i); if (rc < 0) - return rc; + goto unlock; snprintf(&data[i * 4], 5, "%04X", rc); } @@ -225,26 +183,25 @@ static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf, rc = i * 4; break; default: - return -EOPNOTSUPP; + rc = -EOPNOTSUPP; + break; } - goto done; + break; case CFFPS_DEBUGFS_ON_OFF_CONFIG: - rc = i2c_smbus_read_byte_data(psu->client, - PMBUS_ON_OFF_CONFIG); - if (rc < 0) - return rc; - - rc = snprintf(data, 3, "%02x", rc); - goto done; + rc = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG); + if (rc >= 0) + rc = snprintf(data, 3, "%02x", rc); + break; default: - return -EINVAL; + rc = -EINVAL; + break; } - rc = i2c_smbus_read_block_data(psu->client, cmd, data); +unlock: + pmbus_unlock(psu->client); if (rc < 0) return rc; -done: data[rc] = '\n'; rc += 2; @@ -263,14 +220,22 @@ static ssize_t ibm_cffps_debugfs_write(struct file *file, switch (idx) { case CFFPS_DEBUGFS_ON_OFF_CONFIG: - pmbus_set_page(psu->client, 0, 0xff); - rc = simple_write_to_buffer(&data, 1, ppos, buf, count); if (rc <= 0) return rc; - rc = i2c_smbus_write_byte_data(psu->client, - PMBUS_ON_OFF_CONFIG, data); + rc = pmbus_lock_interruptible(psu->client); + if (rc) + return rc; + + rc = pmbus_set_page(psu->client, 0, 0xff); + if (rc) { + pmbus_unlock(psu->client); + return rc; + } + + rc = i2c_smbus_write_byte_data(psu->client, PMBUS_ON_OFF_CONFIG, data); + pmbus_unlock(psu->client); if (rc) return rc; @@ -396,10 +361,19 @@ static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev, dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n", brightness, next_led_state); - pmbus_set_page(psu->client, 0, 0xff); + rc = pmbus_lock_interruptible(psu->client); + if (rc) + return rc; + + rc = pmbus_set_page(psu->client, 0, 0xff); + if (rc) { + pmbus_unlock(psu->client); + return rc; + } rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD, next_led_state); + pmbus_unlock(psu->client); if (rc < 0) return rc; @@ -418,10 +392,19 @@ static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev, dev_dbg(&psu->client->dev, "LED blink set.\n"); - pmbus_set_page(psu->client, 0, 0xff); + rc = pmbus_lock_interruptible(psu->client); + if (rc) + return rc; + + rc = pmbus_set_page(psu->client, 0, 0xff); + if (rc) { + pmbus_unlock(psu->client); + return rc; + } rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD, CFFPS_LED_BLINK); + pmbus_unlock(psu->client); if (rc < 0) return rc; @@ -474,9 +457,11 @@ static struct pmbus_driver_info ibm_cffps_info[] = { PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON, - .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | - PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | - PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT, + .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | + PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT | + PMBUS_HAVE_STATUS_TEMP, .read_byte_data = ibm_cffps_read_byte_data, .read_word_data = ibm_cffps_read_word_data, }, @@ -486,12 +471,19 @@ static struct pmbus_platform_data ibm_cffps_pdata = { .flags = PMBUS_SKIP_STATUS_CHECK | PMBUS_NO_CAPABILITY, }; +static const struct i2c_device_id ibm_cffps_id[] = { + { "ibm_cffps1", cffps1 }, + { "ibm_cffps2", cffps2 }, + { "ibm_cffps", cffps_unknown }, + {} +}; +MODULE_DEVICE_TABLE(i2c, ibm_cffps_id); + static int ibm_cffps_probe(struct i2c_client *client) { int i, rc; enum versions vs = cffps_unknown; struct dentry *debugfs; - struct dentry *ibm_cffps_dir; struct ibm_cffps *psu; const void *md = of_device_get_match_data(&client->dev); const struct i2c_device_id *id; @@ -560,8 +552,6 @@ static int ibm_cffps_probe(struct i2c_client *client) psu->version = vs; psu->client = client; - mutex_init(&psu->input_history.update_lock); - psu->input_history.last_update = jiffies - HZ; ibm_cffps_create_led_class(psu); @@ -570,55 +560,29 @@ static int ibm_cffps_probe(struct i2c_client *client) if (!debugfs) return 0; - ibm_cffps_dir = debugfs_create_dir(client->name, debugfs); - if (!ibm_cffps_dir) - return 0; - for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i) psu->debugfs_entries[i] = i; - debugfs_create_file("input_history", 0444, ibm_cffps_dir, - &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY], - &ibm_cffps_fops); - debugfs_create_file("mfg_id", 0444, ibm_cffps_dir, - &psu->debugfs_entries[CFFPS_DEBUGFS_MFG_ID], - &ibm_cffps_fops); - debugfs_create_file("fru", 0444, ibm_cffps_dir, - &psu->debugfs_entries[CFFPS_DEBUGFS_FRU], - &ibm_cffps_fops); - debugfs_create_file("part_number", 0444, ibm_cffps_dir, - &psu->debugfs_entries[CFFPS_DEBUGFS_PN], - &ibm_cffps_fops); - debugfs_create_file("header", 0444, ibm_cffps_dir, - &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER], - &ibm_cffps_fops); - debugfs_create_file("serial_number", 0444, ibm_cffps_dir, - &psu->debugfs_entries[CFFPS_DEBUGFS_SN], - &ibm_cffps_fops); - debugfs_create_file("max_power_out", 0444, ibm_cffps_dir, + debugfs_create_file("input_history", 0444, debugfs, psu, &ibm_cffps_input_history_fops); + debugfs_create_file("max_power_out", 0444, debugfs, &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT], &ibm_cffps_fops); - debugfs_create_file("ccin", 0444, ibm_cffps_dir, + debugfs_create_file("ccin", 0444, debugfs, &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN], &ibm_cffps_fops); - debugfs_create_file("fw_version", 0444, ibm_cffps_dir, + debugfs_create_file("fw_version", 0444, debugfs, &psu->debugfs_entries[CFFPS_DEBUGFS_FW], &ibm_cffps_fops); - debugfs_create_file("on_off_config", 0644, ibm_cffps_dir, + debugfs_create_file("on_off_config", 0644, debugfs, &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG], &ibm_cffps_fops); + /* For compatibility with users of the old naming scheme. */ + debugfs_create_symlink(client->name, debugfs, "."); + return 0; } -static const struct i2c_device_id ibm_cffps_id[] = { - { "ibm_cffps1", cffps1 }, - { "ibm_cffps2", cffps2 }, - { "ibm_cffps", cffps_unknown }, - {} -}; -MODULE_DEVICE_TABLE(i2c, ibm_cffps_id); - static const struct of_device_id ibm_cffps_of_match[] = { { .compatible = "ibm,cffps1", |