| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Edward A. James | 2548 | 95.54% | 15 | 60.00% |
| Brandon Wyman | 78 | 2.92% | 3 | 12.00% |
| Guenter Roeck | 20 | 0.75% | 2 | 8.00% |
| Stephen Kitt | 16 | 0.60% | 1 | 4.00% |
| Thomas Gleixner | 2 | 0.07% | 1 | 4.00% |
| Uwe Kleine-König | 1 | 0.04% | 1 | 4.00% |
| Krzysztof Kozlowski | 1 | 0.04% | 1 | 4.00% |
| Rob Herring | 1 | 0.04% | 1 | 4.00% |
| Total | 2667 | 25 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2017 IBM Corp. */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/debugfs.h> #include <linux/device.h> #include <linux/fs.h> #include <linux/i2c.h> #include <linux/jiffies.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/pmbus.h> #include "pmbus.h" #define CFFPS_CCIN_CMD 0xBD #define CFFPS_FW_CMD 0xFA #define CFFPS1_FW_NUM_BYTES 4 #define CFFPS2_FW_NUM_WORDS 3 #define CFFPS_SYS_CONFIG_CMD 0xDA #define CFFPS_12VCS_VOUT_CMD 0xDE #define CFFPS_INPUT_HISTORY_CMD 0xD6 #define CFFPS_INPUT_HISTORY_SIZE 101 #define CFFPS_CCIN_REVISION GENMASK(7, 0) #define CFFPS_CCIN_REVISION_LEGACY 0xde #define CFFPS_CCIN_VERSION GENMASK(15, 8) #define CFFPS_CCIN_VERSION_1 0x2b #define CFFPS_CCIN_VERSION_2 0x2e #define CFFPS_CCIN_VERSION_3 0x51 /* STATUS_MFR_SPECIFIC bits */ #define CFFPS_MFR_FAN_FAULT BIT(0) #define CFFPS_MFR_THERMAL_FAULT BIT(1) #define CFFPS_MFR_OV_FAULT BIT(2) #define CFFPS_MFR_UV_FAULT BIT(3) #define CFFPS_MFR_PS_KILL BIT(4) #define CFFPS_MFR_OC_FAULT BIT(5) #define CFFPS_MFR_VAUX_FAULT BIT(6) #define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7) #define CFFPS_LED_BLINK (BIT(0) | BIT(6)) #define CFFPS_LED_ON (BIT(1) | BIT(6)) #define CFFPS_LED_OFF (BIT(2) | BIT(6)) #define CFFPS_BLINK_RATE_MS 250 enum { CFFPS_DEBUGFS_MAX_POWER_OUT = 0, CFFPS_DEBUGFS_CCIN, CFFPS_DEBUGFS_FW, CFFPS_DEBUGFS_ON_OFF_CONFIG, CFFPS_DEBUGFS_NUM_ENTRIES }; enum versions { cffps1, cffps2, cffps_unknown }; struct ibm_cffps { enum versions version; struct i2c_client *client; u8 input_history[CFFPS_INPUT_HISTORY_SIZE]; int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES]; char led_name[32]; u8 led_state; struct led_classdev led; }; #define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)]) static ssize_t ibm_cffps_debugfs_read_input_history(struct file *file, char __user *buf, size_t count, loff_t *ppos) { int rc; 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 = &cmd, }, { .addr = psu->client->addr, .flags = psu->client->flags | I2C_M_RD, .len = CFFPS_INPUT_HISTORY_SIZE, .buf = psu->input_history, }, }; if (!*ppos) { 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; } /* * 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 + 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) { 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 }; 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_MAX_POWER_OUT: 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) 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); if (rc < 0) goto unlock; snprintf(&data[i * 2], 3, "%02X", rc); } rc = i * 2; break; case cffps2: for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) { rc = i2c_smbus_read_word_data(psu->client, CFFPS_FW_CMD + i); if (rc < 0) goto unlock; snprintf(&data[i * 4], 5, "%04X", rc); } rc = i * 4; break; default: rc = -EOPNOTSUPP; break; } break; case CFFPS_DEBUGFS_ON_OFF_CONFIG: rc = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG); if (rc >= 0) rc = snprintf(data, 3, "%02x", rc); break; default: rc = -EINVAL; break; } unlock: pmbus_unlock(psu->client); if (rc < 0) return rc; data[rc] = '\n'; rc += 2; return simple_read_from_buffer(buf, count, ppos, data, rc); } static ssize_t ibm_cffps_debugfs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { u8 data; ssize_t rc; int *idxp = file->private_data; int idx = *idxp; struct ibm_cffps *psu = to_psu(idxp, idx); switch (idx) { case CFFPS_DEBUGFS_ON_OFF_CONFIG: rc = simple_write_to_buffer(&data, 1, ppos, buf, count); if (rc <= 0) return rc; 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; rc = 1; break; default: return -EINVAL; } return rc; } static const struct file_operations ibm_cffps_fops = { .llseek = noop_llseek, .read = ibm_cffps_debugfs_read, .write = ibm_cffps_debugfs_write, .open = simple_open, }; static int ibm_cffps_read_byte_data(struct i2c_client *client, int page, int reg) { int rc, mfr; switch (reg) { case PMBUS_STATUS_VOUT: case PMBUS_STATUS_IOUT: case PMBUS_STATUS_TEMPERATURE: case PMBUS_STATUS_FAN_12: rc = pmbus_read_byte_data(client, page, reg); if (rc < 0) return rc; mfr = pmbus_read_byte_data(client, page, PMBUS_STATUS_MFR_SPECIFIC); if (mfr < 0) /* * Return the status register instead of an error, * since we successfully read status. */ return rc; /* Add MFR_SPECIFIC bits to the standard pmbus status regs. */ if (reg == PMBUS_STATUS_FAN_12) { if (mfr & CFFPS_MFR_FAN_FAULT) rc |= PB_FAN_FAN1_FAULT; } else if (reg == PMBUS_STATUS_TEMPERATURE) { if (mfr & CFFPS_MFR_THERMAL_FAULT) rc |= PB_TEMP_OT_FAULT; } else if (reg == PMBUS_STATUS_VOUT) { if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT)) rc |= PB_VOLTAGE_OV_FAULT; if (mfr & CFFPS_MFR_UV_FAULT) rc |= PB_VOLTAGE_UV_FAULT; } else if (reg == PMBUS_STATUS_IOUT) { if (mfr & CFFPS_MFR_OC_FAULT) rc |= PB_IOUT_OC_FAULT; if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING) rc |= PB_CURRENT_SHARE_FAULT; } break; default: rc = -ENODATA; break; } return rc; } static int ibm_cffps_read_word_data(struct i2c_client *client, int page, int phase, int reg) { int rc, mfr; switch (reg) { case PMBUS_STATUS_WORD: rc = pmbus_read_word_data(client, page, phase, reg); if (rc < 0) return rc; mfr = pmbus_read_byte_data(client, page, PMBUS_STATUS_MFR_SPECIFIC); if (mfr < 0) /* * Return the status register instead of an error, * since we successfully read status. */ return rc; if (mfr & CFFPS_MFR_PS_KILL) rc |= PB_STATUS_OFF; break; case PMBUS_VIRT_READ_VMON: rc = pmbus_read_word_data(client, page, phase, CFFPS_12VCS_VOUT_CMD); break; default: rc = -ENODATA; break; } return rc; } static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev, enum led_brightness brightness) { int rc; u8 next_led_state; struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led); if (brightness == LED_OFF) { next_led_state = CFFPS_LED_OFF; } else { brightness = LED_FULL; if (psu->led_state != CFFPS_LED_BLINK) next_led_state = CFFPS_LED_ON; else next_led_state = CFFPS_LED_BLINK; } dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n", brightness, next_led_state); 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; psu->led_state = next_led_state; led_cdev->brightness = brightness; return 0; } static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off) { int rc; struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led); dev_dbg(&psu->client->dev, "LED blink set.\n"); 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; psu->led_state = CFFPS_LED_BLINK; led_cdev->brightness = LED_FULL; *delay_on = CFFPS_BLINK_RATE_MS; *delay_off = CFFPS_BLINK_RATE_MS; return 0; } static void ibm_cffps_create_led_class(struct ibm_cffps *psu) { int rc; struct i2c_client *client = psu->client; struct device *dev = &client->dev; snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name, client->addr); psu->led.name = psu->led_name; psu->led.max_brightness = LED_FULL; psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set; psu->led.blink_set = ibm_cffps_led_blink_set; rc = devm_led_classdev_register(dev, &psu->led); if (rc) dev_warn(dev, "failed to register led class: %d\n", rc); else i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD, CFFPS_LED_OFF); } static struct pmbus_driver_info ibm_cffps_info[] = { [cffps1] = { .pages = 1, .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | 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 | PMBUS_HAVE_STATUS_FAN12, .read_byte_data = ibm_cffps_read_byte_data, .read_word_data = ibm_cffps_read_word_data, }, [cffps2] = { .pages = 2, .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | 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 | PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON, .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, }, }; 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 ibm_cffps *psu; const void *md = of_device_get_match_data(&client->dev); const struct i2c_device_id *id; if (md) { vs = (uintptr_t)md; } else { id = i2c_match_id(ibm_cffps_id, client); if (id) vs = (enum versions)id->driver_data; } if (vs == cffps_unknown) { u16 ccin_revision = 0; u16 ccin_version = CFFPS_CCIN_VERSION_1; int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD); char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; if (ccin > 0) { ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin); ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin); } rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id); if (rc < 0) { dev_err(&client->dev, "Failed to read Manufacturer ID\n"); return rc; } switch (ccin_version) { default: case CFFPS_CCIN_VERSION_1: if ((strncmp(mfg_id, "ACBE", 4) == 0) || (strncmp(mfg_id, "ARTE", 4) == 0)) vs = cffps1; else vs = cffps2; break; case CFFPS_CCIN_VERSION_2: vs = cffps2; break; case CFFPS_CCIN_VERSION_3: if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY) vs = cffps1; else vs = cffps2; break; } /* Set the client name to include the version number. */ snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1); } client->dev.platform_data = &ibm_cffps_pdata; rc = pmbus_do_probe(client, &ibm_cffps_info[vs]); if (rc) return rc; /* * Don't fail the probe if there isn't enough memory for leds and * debugfs. */ psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL); if (!psu) return 0; psu->version = vs; psu->client = client; ibm_cffps_create_led_class(psu); /* Don't fail the probe if we can't create debugfs */ debugfs = pmbus_get_debugfs_dir(client); if (!debugfs) return 0; for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i) psu->debugfs_entries[i] = i; 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, debugfs, &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN], &ibm_cffps_fops); debugfs_create_file("fw_version", 0444, debugfs, &psu->debugfs_entries[CFFPS_DEBUGFS_FW], &ibm_cffps_fops); 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 of_device_id ibm_cffps_of_match[] = { { .compatible = "ibm,cffps1", .data = (void *)cffps1 }, { .compatible = "ibm,cffps2", .data = (void *)cffps2 }, { .compatible = "ibm,cffps", .data = (void *)cffps_unknown }, {} }; MODULE_DEVICE_TABLE(of, ibm_cffps_of_match); static struct i2c_driver ibm_cffps_driver = { .driver = { .name = "ibm-cffps", .of_match_table = ibm_cffps_of_match, }, .probe = ibm_cffps_probe, .id_table = ibm_cffps_id, }; module_i2c_driver(ibm_cffps_driver); MODULE_AUTHOR("Eddie James"); MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS(PMBUS);
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