/*************************************************************************** * Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> * * * * 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; either version 2 of the License, or * * (at your option) any later version. * * * * 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. * * * * You should have received a copy of the GNU General Public License * * along with this program; if not, write to the * * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/platform_device.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/io.h> #include <linux/acpi.h> #include <linux/delay.h> #define DRVNAME "sch5627" #define DEVNAME DRVNAME /* We only support one model */ #define SIO_SCH5627_EM_LD 0x0C /* Embedded Microcontroller LD */ #define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */ #define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */ #define SIO_REG_LDSEL 0x07 /* Logical device select */ #define SIO_REG_DEVID 0x20 /* Device ID */ #define SIO_REG_ENABLE 0x30 /* Logical device enable */ #define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */ #define SIO_SCH5627_ID 0xC6 /* Chipset ID */ #define REGION_LENGTH 9 #define SCH5627_HWMON_ID 0xa5 #define SCH5627_COMPANY_ID 0x5c #define SCH5627_PRIMARY_ID 0xa0 #define SCH5627_REG_BUILD_CODE 0x39 #define SCH5627_REG_BUILD_ID 0x3a #define SCH5627_REG_HWMON_ID 0x3c #define SCH5627_REG_HWMON_REV 0x3d #define SCH5627_REG_COMPANY_ID 0x3e #define SCH5627_REG_PRIMARY_ID 0x3f #define SCH5627_REG_CTRL 0x40 #define SCH5627_NO_TEMPS 8 #define SCH5627_NO_FANS 4 #define SCH5627_NO_IN 5 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = { 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 }; static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = { 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 }; static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = { 0, 0, 1, 1, 0, 0, 0, 1 }; static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = { 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 }; static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = { 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 }; static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = { 0x2C, 0x2E, 0x30, 0x32 }; static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = { 0x62, 0x64, 0x66, 0x68 }; static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = { 0x22, 0x23, 0x24, 0x25, 0x189 }; static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = { 0xE4, 0xE4, 0xE3, 0xE3, 0x18A }; static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = { 1, 0, 1, 0, 1 }; static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = { 10745, 3660, 9765, 10745, 3660 }; static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = { "VCC", "VTT", "VBAT", "VTR", "V_IN" }; struct sch5627_data { unsigned short addr; struct device *hwmon_dev; u8 temp_max[SCH5627_NO_TEMPS]; u8 temp_crit[SCH5627_NO_TEMPS]; u16 fan_min[SCH5627_NO_FANS]; struct mutex update_lock; char valid; /* !=0 if following fields are valid */ unsigned long last_updated; /* In jiffies */ u16 temp[SCH5627_NO_TEMPS]; u16 fan[SCH5627_NO_FANS]; u16 in[SCH5627_NO_IN]; }; static struct platform_device *sch5627_pdev; /* Super I/O functions */ static inline int superio_inb(int base, int reg) { outb(reg, base); return inb(base + 1); } static inline int superio_enter(int base) { /* Don't step on other drivers' I/O space by accident */ if (!request_muxed_region(base, 2, DRVNAME)) { pr_err("I/O address 0x%04x already in use\n", base); return -EBUSY; } outb(SIO_UNLOCK_KEY, base); return 0; } static inline void superio_select(int base, int ld) { outb(SIO_REG_LDSEL, base); outb(ld, base + 1); } static inline void superio_exit(int base) { outb(SIO_LOCK_KEY, base); release_region(base, 2); } static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg) { u8 val; int i; /* * According to SMSC for the commands we use the maximum time for * the EM to respond is 15 ms, but testing shows in practice it * responds within 15-32 reads, so we first busy poll, and if * that fails sleep a bit and try again until we are way past * the 15 ms maximum response time. */ const int max_busy_polls = 64; const int max_lazy_polls = 32; /* (Optional) Write-Clear the EC to Host Mailbox Register */ val = inb(data->addr + 1); outb(val, data->addr + 1); /* Set Mailbox Address Pointer to first location in Region 1 */ outb(0x00, data->addr + 2); outb(0x80, data->addr + 3); /* Write Request Packet Header */ outb(0x02, data->addr + 4); /* Access Type: VREG read */ outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */ outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */ /* Write Address field */ outb(reg & 0xff, data->addr + 6); outb(reg >> 8, data->addr + 7); /* Execute the Random Access Command */ outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */ /* EM Interface Polling "Algorithm" */ for (i = 0; i < max_busy_polls + max_lazy_polls; i++) { if (i >= max_busy_polls) msleep(1); /* Read Interrupt source Register */ val = inb(data->addr + 8); /* Write Clear the interrupt source bits */ if (val) outb(val, data->addr + 8); /* Command Completed ? */ if (val & 0x01) break; } if (i == max_busy_polls + max_lazy_polls) { pr_err("Max retries exceeded reading virtual " "register 0x%04hx (%d)\n", reg, 1); return -EIO; } /* * According to SMSC we may need to retry this, but sofar I've always * seen this succeed in 1 try. */ for (i = 0; i < max_busy_polls; i++) { /* Read EC-to-Host Register */ val = inb(data->addr + 1); /* Command Completed ? */ if (val == 0x01) break; if (i == 0) pr_warn("EC reports: 0x%02x reading virtual register " "0x%04hx\n", (unsigned int)val, reg); } if (i == max_busy_polls) { pr_err("Max retries exceeded reading virtual " "register 0x%04hx (%d)\n", reg, 2); return -EIO; } /* * According to the SMSC app note we should now do: * * Set Mailbox Address Pointer to first location in Region 1 * * outb(0x00, data->addr + 2); * outb(0x80, data->addr + 3); * * But if we do that things don't work, so let's not. */ /* Read Data from Mailbox */ return inb(data->addr + 4); } static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg) { int lsb, msb; /* Read LSB first, this will cause the matching MSB to be latched */ lsb = sch5627_read_virtual_reg(data, reg); if (lsb < 0) return lsb; msb = sch5627_read_virtual_reg(data, reg + 1); if (msb < 0) return msb; return lsb | (msb << 8); } static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg, u16 lsn_reg, int high_nibble) { int msb, lsn; /* Read MSB first, this will cause the matching LSN to be latched */ msb = sch5627_read_virtual_reg(data, msb_reg); if (msb < 0) return msb; lsn = sch5627_read_virtual_reg(data, lsn_reg); if (lsn < 0) return lsn; if (high_nibble) return (msb << 4) | (lsn >> 4); else return (msb << 4) | (lsn & 0x0f); } static struct sch5627_data *sch5627_update_device(struct device *dev) { struct sch5627_data *data = dev_get_drvdata(dev); struct sch5627_data *ret = data; int i, val; mutex_lock(&data->update_lock); /* Cache the values for 1 second */ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { for (i = 0; i < SCH5627_NO_TEMPS; i++) { val = sch5627_read_virtual_reg12(data, SCH5627_REG_TEMP_MSB[i], SCH5627_REG_TEMP_LSN[i], SCH5627_REG_TEMP_HIGH_NIBBLE[i]); if (unlikely(val < 0)) { ret = ERR_PTR(val); goto abort; } data->temp[i] = val; } for (i = 0; i < SCH5627_NO_FANS; i++) { val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN[i]); if (unlikely(val < 0)) { ret = ERR_PTR(val); goto abort; } data->fan[i] = val; } for (i = 0; i < SCH5627_NO_IN; i++) { val = sch5627_read_virtual_reg12(data, SCH5627_REG_IN_MSB[i], SCH5627_REG_IN_LSN[i], SCH5627_REG_IN_HIGH_NIBBLE[i]); if (unlikely(val < 0)) { ret = ERR_PTR(val); goto abort; } data->in[i] = val; } data->last_updated = jiffies; data->valid = 1; } abort: mutex_unlock(&data->update_lock); return ret; } static int __devinit sch5627_read_limits(struct sch5627_data *data) { int i, val; for (i = 0; i < SCH5627_NO_TEMPS; i++) { /* * Note what SMSC calls ABS, is what lm_sensors calls max * (aka high), and HIGH is what lm_sensors calls crit. */ val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]); if (val < 0) return val; data->temp_max[i] = val; val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]); if (val < 0) return val; data->temp_crit[i] = val; } for (i = 0; i < SCH5627_NO_FANS; i++) { val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]); if (val < 0) return val; data->fan_min[i] = val; } return 0; } static int reg_to_temp(u16 reg) { return (reg * 625) / 10 - 64000; } static int reg_to_temp_limit(u8 reg) { return (reg - 64) * 1000; } static int reg_to_rpm(u16 reg) { if (reg == 0) return -EIO; if (reg == 0xffff) return 0; return 5400540 / reg; } static ssize_t show_name(struct device *dev, struct device_attribute *devattr, char *buf) { return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME); } static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = sch5627_update_device(dev); int val; if (IS_ERR(data)) return PTR_ERR(data); val = reg_to_temp(data->temp[attr->index]); return snprintf(buf, PAGE_SIZE, "%d\n", val); } static ssize_t show_temp_fault(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = sch5627_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0); } static ssize_t show_temp_max(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = dev_get_drvdata(dev); int val; val = reg_to_temp_limit(data->temp_max[attr->index]); return snprintf(buf, PAGE_SIZE, "%d\n", val); } static ssize_t show_temp_crit(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = dev_get_drvdata(dev); int val; val = reg_to_temp_limit(data->temp_crit[attr->index]); return snprintf(buf, PAGE_SIZE, "%d\n", val); } static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = sch5627_update_device(dev); int val; if (IS_ERR(data)) return PTR_ERR(data); val = reg_to_rpm(data->fan[attr->index]); if (val < 0) return val; return snprintf(buf, PAGE_SIZE, "%d\n", val); } static ssize_t show_fan_fault(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = sch5627_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return snprintf(buf, PAGE_SIZE, "%d\n", data->fan[attr->index] == 0xffff); } static ssize_t show_fan_min(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = dev_get_drvdata(dev); int val = reg_to_rpm(data->fan_min[attr->index]); if (val < 0) return val; return snprintf(buf, PAGE_SIZE, "%d\n", val); } static ssize_t show_in(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct sch5627_data *data = sch5627_update_device(dev); int val; if (IS_ERR(data)) return PTR_ERR(data); val = DIV_ROUND_CLOSEST( data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index], 10000); return snprintf(buf, PAGE_SIZE, "%d\n", val); } static ssize_t show_in_label(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); return snprintf(buf, PAGE_SIZE, "%s\n", SCH5627_IN_LABELS[attr->index]); } static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6); static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7); static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1); static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2); static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3); static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4); static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5); static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6); static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7); static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1); static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2); static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3); static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4); static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5); static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6); static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7); static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0); static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1); static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2); static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3); static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0); static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1); static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2); static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3); static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0); static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1); static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2); static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3); static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4); static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0); static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1); static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2); static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3); static struct attribute *sch5627_attributes[] = { &dev_attr_name.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp4_input.dev_attr.attr, &sensor_dev_attr_temp5_input.dev_attr.attr, &sensor_dev_attr_temp6_input.dev_attr.attr, &sensor_dev_attr_temp7_input.dev_attr.attr, &sensor_dev_attr_temp8_input.dev_attr.attr, &sensor_dev_attr_temp1_fault.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, &sensor_dev_attr_temp4_fault.dev_attr.attr, &sensor_dev_attr_temp5_fault.dev_attr.attr, &sensor_dev_attr_temp6_fault.dev_attr.attr, &sensor_dev_attr_temp7_fault.dev_attr.attr, &sensor_dev_attr_temp8_fault.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp4_max.dev_attr.attr, &sensor_dev_attr_temp5_max.dev_attr.attr, &sensor_dev_attr_temp6_max.dev_attr.attr, &sensor_dev_attr_temp7_max.dev_attr.attr, &sensor_dev_attr_temp8_max.dev_attr.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, &sensor_dev_attr_temp3_crit.dev_attr.attr, &sensor_dev_attr_temp4_crit.dev_attr.attr, &sensor_dev_attr_temp5_crit.dev_attr.attr, &sensor_dev_attr_temp6_crit.dev_attr.attr, &sensor_dev_attr_temp7_crit.dev_attr.attr, &sensor_dev_attr_temp8_crit.dev_attr.attr, &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan2_input.dev_attr.attr, &sensor_dev_attr_fan3_input.dev_attr.attr, &sensor_dev_attr_fan4_input.dev_attr.attr, &sensor_dev_attr_fan1_fault.dev_attr.attr, &sensor_dev_attr_fan2_fault.dev_attr.attr, &sensor_dev_attr_fan3_fault.dev_attr.attr, &sensor_dev_attr_fan4_fault.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan2_min.dev_attr.attr, &sensor_dev_attr_fan3_min.dev_attr.attr, &sensor_dev_attr_fan4_min.dev_attr.attr, &sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in0_label.dev_attr.attr, &sensor_dev_attr_in1_label.dev_attr.attr, &sensor_dev_attr_in2_label.dev_attr.attr, &sensor_dev_attr_in3_label.dev_attr.attr, /* No in4_label as in4 is a generic input pin */ NULL }; static const struct attribute_group sch5627_group = { .attrs = sch5627_attributes, }; static int sch5627_remove(struct platform_device *pdev) { struct sch5627_data *data = platform_get_drvdata(pdev); if (data->hwmon_dev) hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&pdev->dev.kobj, &sch5627_group); platform_set_drvdata(pdev, NULL); kfree(data); return 0; } static int __devinit sch5627_probe(struct platform_device *pdev) { struct sch5627_data *data; int err, build_code, build_id, hwmon_rev, val; data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL); if (!data) return -ENOMEM; data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; mutex_init(&data->update_lock); platform_set_drvdata(pdev, data); val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID); if (val < 0) { err = val; goto error; } if (val != SCH5627_HWMON_ID) { pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon", val, SCH5627_HWMON_ID); err = -ENODEV; goto error; } val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID); if (val < 0) { err = val; goto error; } if (val != SCH5627_COMPANY_ID) { pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company", val, SCH5627_COMPANY_ID); err = -ENODEV; goto error; } val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID); if (val < 0) { err = val; goto error; } if (val != SCH5627_PRIMARY_ID) { pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary", val, SCH5627_PRIMARY_ID); err = -ENODEV; goto error; } build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE); if (build_code < 0) { err = build_code; goto error; } build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID); if (build_id < 0) { err = build_id; goto error; } hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV); if (hwmon_rev < 0) { err = hwmon_rev; goto error; } val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL); if (val < 0) { err = val; goto error; } if (!(val & 0x01)) { pr_err("hardware monitoring not enabled\n"); err = -ENODEV; goto error; } /* * Read limits, we do this only once as reading a register on * the sch5627 is quite expensive (and they don't change). */ err = sch5627_read_limits(data); if (err) goto error; pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", build_code, build_id, hwmon_rev); /* Register sysfs interface files */ err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group); if (err) goto error; data->hwmon_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); data->hwmon_dev = NULL; goto error; } return 0; error: sch5627_remove(pdev); return err; } static int __init sch5627_find(int sioaddr, unsigned short *address) { u8 devid; int err = superio_enter(sioaddr); if (err) return err; devid = superio_inb(sioaddr, SIO_REG_DEVID); if (devid != SIO_SCH5627_ID) { pr_debug("Unsupported device id: 0x%02x\n", (unsigned int)devid); err = -ENODEV; goto exit; } superio_select(sioaddr, SIO_SCH5627_EM_LD); if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) { pr_warn("Device not activated\n"); err = -ENODEV; goto exit; } /* * Warning the order of the low / high byte is the other way around * as on most other superio devices!! */ *address = superio_inb(sioaddr, SIO_REG_ADDR) | superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8; if (*address == 0) { pr_warn("Base address not set\n"); err = -ENODEV; goto exit; } pr_info("Found %s chip at %#hx\n", DEVNAME, *address); exit: superio_exit(sioaddr); return err; } static int __init sch5627_device_add(unsigned short address) { struct resource res = { .start = address, .end = address + REGION_LENGTH - 1, .flags = IORESOURCE_IO, }; int err; sch5627_pdev = platform_device_alloc(DRVNAME, address); if (!sch5627_pdev) return -ENOMEM; res.name = sch5627_pdev->name; err = acpi_check_resource_conflict(&res); if (err) goto exit_device_put; err = platform_device_add_resources(sch5627_pdev, &res, 1); if (err) { pr_err("Device resource addition failed\n"); goto exit_device_put; } err = platform_device_add(sch5627_pdev); if (err) { pr_err("Device addition failed\n"); goto exit_device_put; } return 0; exit_device_put: platform_device_put(sch5627_pdev); return err; } static struct platform_driver sch5627_driver = { .driver = { .owner = THIS_MODULE, .name = DRVNAME, }, .probe = sch5627_probe, .remove = sch5627_remove, }; static int __init sch5627_init(void) { int err = -ENODEV; unsigned short address; if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address)) goto exit; err = platform_driver_register(&sch5627_driver); if (err) goto exit; err = sch5627_device_add(address); if (err) goto exit_driver; return 0; exit_driver: platform_driver_unregister(&sch5627_driver); exit: return err; } static void __exit sch5627_exit(void) { platform_device_unregister(sch5627_pdev); platform_driver_unregister(&sch5627_driver); } MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver"); MODULE_AUTHOR("Hans de Goede (hdegoede@redhat.com)"); MODULE_LICENSE("GPL"); module_init(sch5627_init); module_exit(sch5627_exit);