diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/hwmon/vt1211.c | 1367 |
1 files changed, 1367 insertions, 0 deletions
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c new file mode 100644 index 000000000..4a5e911d2 --- /dev/null +++ b/drivers/hwmon/vt1211.c @@ -0,0 +1,1367 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware + * monitoring features + * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com> + * + * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker + * and its port to kernel 2.6 by Lars Ekman. + */ + +#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/hwmon-vid.h> +#include <linux/err.h> +#include <linux/mutex.h> +#include <linux/ioport.h> +#include <linux/acpi.h> +#include <linux/io.h> + +static int uch_config = -1; +module_param(uch_config, int, 0); +MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration"); + +static int int_mode = -1; +module_param(int_mode, int, 0); +MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode"); + +static unsigned short force_id; +module_param(force_id, ushort, 0); +MODULE_PARM_DESC(force_id, "Override the detected device ID"); + +static struct platform_device *pdev; + +#define DRVNAME "vt1211" + +/* --------------------------------------------------------------------- + * Registers + * + * The sensors are defined as follows. + * + * Sensor Voltage Mode Temp Mode Notes (from the datasheet) + * -------- ------------ --------- -------------------------- + * Reading 1 temp1 Intel thermal diode + * Reading 3 temp2 Internal thermal diode + * UCH1/Reading2 in0 temp3 NTC type thermistor + * UCH2 in1 temp4 +2.5V + * UCH3 in2 temp5 VccP + * UCH4 in3 temp6 +5V + * UCH5 in4 temp7 +12V + * 3.3V in5 Internal VDD (+3.3V) + * + * --------------------------------------------------------------------- */ + +/* Voltages (in) numbered 0-5 (ix) */ +#define VT1211_REG_IN(ix) (0x21 + (ix)) +#define VT1211_REG_IN_MIN(ix) ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix)) +#define VT1211_REG_IN_MAX(ix) ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix)) + +/* Temperatures (temp) numbered 0-6 (ix) */ +static u8 regtemp[] = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25}; +static u8 regtempmax[] = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31}; +static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32}; + +/* Fans numbered 0-1 (ix) */ +#define VT1211_REG_FAN(ix) (0x29 + (ix)) +#define VT1211_REG_FAN_MIN(ix) (0x3b + (ix)) +#define VT1211_REG_FAN_DIV 0x47 + +/* PWMs numbered 0-1 (ix) */ +/* Auto points numbered 0-3 (ap) */ +#define VT1211_REG_PWM(ix) (0x60 + (ix)) +#define VT1211_REG_PWM_CLK 0x50 +#define VT1211_REG_PWM_CTL 0x51 +#define VT1211_REG_PWM_AUTO_TEMP(ap) (0x55 - (ap)) +#define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap)) + +/* Miscellaneous registers */ +#define VT1211_REG_CONFIG 0x40 +#define VT1211_REG_ALARM1 0x41 +#define VT1211_REG_ALARM2 0x42 +#define VT1211_REG_VID 0x45 +#define VT1211_REG_UCH_CONFIG 0x4a +#define VT1211_REG_TEMP1_CONFIG 0x4b +#define VT1211_REG_TEMP2_CONFIG 0x4c + +/* In, temp & fan alarm bits */ +static const u8 bitalarmin[] = {11, 0, 1, 3, 8, 2, 9}; +static const u8 bitalarmtemp[] = {4, 15, 11, 0, 1, 3, 8}; +static const u8 bitalarmfan[] = {6, 7}; + +/* --------------------------------------------------------------------- + * Data structures and manipulation thereof + * --------------------------------------------------------------------- */ + +struct vt1211_data { + unsigned short addr; + const char *name; + struct device *hwmon_dev; + + struct mutex update_lock; + bool valid; /* true if following fields are valid */ + unsigned long last_updated; /* In jiffies */ + + /* Register values */ + u8 in[6]; + u8 in_max[6]; + u8 in_min[6]; + u8 temp[7]; + u8 temp_max[7]; + u8 temp_hyst[7]; + u8 fan[2]; + u8 fan_min[2]; + u8 fan_div[2]; + u8 fan_ctl; + u8 pwm[2]; + u8 pwm_ctl[2]; + u8 pwm_clk; + u8 pwm_auto_temp[4]; + u8 pwm_auto_pwm[2][4]; + u8 vid; /* Read once at init time */ + u8 vrm; + u8 uch_config; /* Read once at init time */ + u16 alarms; +}; + +/* ix = [0-5] */ +#define ISVOLT(ix, uch_config) ((ix) > 4 ? 1 : \ + !(((uch_config) >> ((ix) + 2)) & 1)) + +/* ix = [0-6] */ +#define ISTEMP(ix, uch_config) ((ix) < 2 ? 1 : \ + ((uch_config) >> (ix)) & 1) + +/* + * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the + * driver according to the VT1211 BIOS porting guide + */ +#define IN_FROM_REG(ix, reg) ((reg) < 3 ? 0 : (ix) == 5 ? \ + (((reg) - 3) * 15882 + 479) / 958 : \ + (((reg) - 3) * 10000 + 479) / 958) +#define IN_TO_REG(ix, val) (clamp_val((ix) == 5 ? \ + ((val) * 958 + 7941) / 15882 + 3 : \ + ((val) * 958 + 5000) / 10000 + 3, 0, 255)) + +/* + * temp1 (ix = 0) is an intel thermal diode which is scaled in user space. + * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver + * according to some measurements that I took on an EPIA M10000. + * temp3-7 are thermistor based so the driver returns the voltage measured at + * the pin (range 0V - 2.2V). + */ +#define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \ + (ix) == 1 ? (reg) < 51 ? 0 : \ + ((reg) - 51) * 1000 : \ + ((253 - (reg)) * 2200 + 105) / 210) +#define TEMP_TO_REG(ix, val) clamp_val( \ + ((ix) == 0 ? ((val) + 500) / 1000 : \ + (ix) == 1 ? ((val) + 500) / 1000 + 51 : \ + 253 - ((val) * 210 + 1100) / 2200), 0, 255) + +#define DIV_FROM_REG(reg) (1 << (reg)) + +#define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \ + 1310720 / (reg) / DIV_FROM_REG(div)) +#define RPM_TO_REG(val, div) ((val) == 0 ? 255 : \ + clamp_val((1310720 / (val) / \ + DIV_FROM_REG(div)), 1, 254)) + +/* --------------------------------------------------------------------- + * Super-I/O constants and functions + * --------------------------------------------------------------------- */ + +/* + * Configuration index port registers + * The vt1211 can live at 2 different addresses so we need to probe both + */ +#define SIO_REG_CIP1 0x2e +#define SIO_REG_CIP2 0x4e + +/* Configuration registers */ +#define SIO_VT1211_LDN 0x07 /* logical device number */ +#define SIO_VT1211_DEVID 0x20 /* device ID */ +#define SIO_VT1211_DEVREV 0x21 /* device revision */ +#define SIO_VT1211_ACTIVE 0x30 /* HW monitor active */ +#define SIO_VT1211_BADDR 0x60 /* base I/O address */ +#define SIO_VT1211_ID 0x3c /* VT1211 device ID */ + +/* VT1211 logical device numbers */ +#define SIO_VT1211_LDN_HWMON 0x0b /* HW monitor */ + +static inline void superio_outb(int sio_cip, int reg, int val) +{ + outb(reg, sio_cip); + outb(val, sio_cip + 1); +} + +static inline int superio_inb(int sio_cip, int reg) +{ + outb(reg, sio_cip); + return inb(sio_cip + 1); +} + +static inline void superio_select(int sio_cip, int ldn) +{ + outb(SIO_VT1211_LDN, sio_cip); + outb(ldn, sio_cip + 1); +} + +static inline int superio_enter(int sio_cip) +{ + if (!request_muxed_region(sio_cip, 2, DRVNAME)) + return -EBUSY; + + outb(0x87, sio_cip); + outb(0x87, sio_cip); + + return 0; +} + +static inline void superio_exit(int sio_cip) +{ + outb(0xaa, sio_cip); + release_region(sio_cip, 2); +} + +/* --------------------------------------------------------------------- + * Device I/O access + * --------------------------------------------------------------------- */ + +static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg) +{ + return inb(data->addr + reg); +} + +static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val) +{ + outb(val, data->addr + reg); +} + +static struct vt1211_data *vt1211_update_device(struct device *dev) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + int ix, val; + + mutex_lock(&data->update_lock); + + /* registers cache is refreshed after 1 second */ + if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { + /* read VID */ + data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f; + + /* voltage (in) registers */ + for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) { + if (ISVOLT(ix, data->uch_config)) { + data->in[ix] = vt1211_read8(data, + VT1211_REG_IN(ix)); + data->in_min[ix] = vt1211_read8(data, + VT1211_REG_IN_MIN(ix)); + data->in_max[ix] = vt1211_read8(data, + VT1211_REG_IN_MAX(ix)); + } + } + + /* temp registers */ + for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) { + if (ISTEMP(ix, data->uch_config)) { + data->temp[ix] = vt1211_read8(data, + regtemp[ix]); + data->temp_max[ix] = vt1211_read8(data, + regtempmax[ix]); + data->temp_hyst[ix] = vt1211_read8(data, + regtemphyst[ix]); + } + } + + /* fan & pwm registers */ + for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) { + data->fan[ix] = vt1211_read8(data, + VT1211_REG_FAN(ix)); + data->fan_min[ix] = vt1211_read8(data, + VT1211_REG_FAN_MIN(ix)); + data->pwm[ix] = vt1211_read8(data, + VT1211_REG_PWM(ix)); + } + val = vt1211_read8(data, VT1211_REG_FAN_DIV); + data->fan_div[0] = (val >> 4) & 3; + data->fan_div[1] = (val >> 6) & 3; + data->fan_ctl = val & 0xf; + + val = vt1211_read8(data, VT1211_REG_PWM_CTL); + data->pwm_ctl[0] = val & 0xf; + data->pwm_ctl[1] = (val >> 4) & 0xf; + + data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK); + + /* pwm & temp auto point registers */ + data->pwm_auto_pwm[0][1] = vt1211_read8(data, + VT1211_REG_PWM_AUTO_PWM(0, 1)); + data->pwm_auto_pwm[0][2] = vt1211_read8(data, + VT1211_REG_PWM_AUTO_PWM(0, 2)); + data->pwm_auto_pwm[1][1] = vt1211_read8(data, + VT1211_REG_PWM_AUTO_PWM(1, 1)); + data->pwm_auto_pwm[1][2] = vt1211_read8(data, + VT1211_REG_PWM_AUTO_PWM(1, 2)); + for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) { + data->pwm_auto_temp[ix] = vt1211_read8(data, + VT1211_REG_PWM_AUTO_TEMP(ix)); + } + + /* alarm registers */ + data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) | + vt1211_read8(data, VT1211_REG_ALARM1); + + data->last_updated = jiffies; + data->valid = true; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +/* --------------------------------------------------------------------- + * Voltage sysfs interfaces + * ix = [0-5] + * --------------------------------------------------------------------- */ + +#define SHOW_IN_INPUT 0 +#define SHOW_SET_IN_MIN 1 +#define SHOW_SET_IN_MAX 2 +#define SHOW_IN_ALARM 3 + +static ssize_t show_in(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + int res; + + switch (fn) { + case SHOW_IN_INPUT: + res = IN_FROM_REG(ix, data->in[ix]); + break; + case SHOW_SET_IN_MIN: + res = IN_FROM_REG(ix, data->in_min[ix]); + break; + case SHOW_SET_IN_MAX: + res = IN_FROM_REG(ix, data->in_max[ix]); + break; + case SHOW_IN_ALARM: + res = (data->alarms >> bitalarmin[ix]) & 1; + break; + default: + res = 0; + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + + return sprintf(buf, "%d\n", res); +} + +static ssize_t set_in(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + switch (fn) { + case SHOW_SET_IN_MIN: + data->in_min[ix] = IN_TO_REG(ix, val); + vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]); + break; + case SHOW_SET_IN_MAX: + data->in_max[ix] = IN_TO_REG(ix, val); + vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]); + break; + default: + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + mutex_unlock(&data->update_lock); + + return count; +} + +/* --------------------------------------------------------------------- + * Temperature sysfs interfaces + * ix = [0-6] + * --------------------------------------------------------------------- */ + +#define SHOW_TEMP_INPUT 0 +#define SHOW_SET_TEMP_MAX 1 +#define SHOW_SET_TEMP_MAX_HYST 2 +#define SHOW_TEMP_ALARM 3 + +static ssize_t show_temp(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + int res; + + switch (fn) { + case SHOW_TEMP_INPUT: + res = TEMP_FROM_REG(ix, data->temp[ix]); + break; + case SHOW_SET_TEMP_MAX: + res = TEMP_FROM_REG(ix, data->temp_max[ix]); + break; + case SHOW_SET_TEMP_MAX_HYST: + res = TEMP_FROM_REG(ix, data->temp_hyst[ix]); + break; + case SHOW_TEMP_ALARM: + res = (data->alarms >> bitalarmtemp[ix]) & 1; + break; + default: + res = 0; + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + + return sprintf(buf, "%d\n", res); +} + +static ssize_t set_temp(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + switch (fn) { + case SHOW_SET_TEMP_MAX: + data->temp_max[ix] = TEMP_TO_REG(ix, val); + vt1211_write8(data, regtempmax[ix], + data->temp_max[ix]); + break; + case SHOW_SET_TEMP_MAX_HYST: + data->temp_hyst[ix] = TEMP_TO_REG(ix, val); + vt1211_write8(data, regtemphyst[ix], + data->temp_hyst[ix]); + break; + default: + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + mutex_unlock(&data->update_lock); + + return count; +} + +/* --------------------------------------------------------------------- + * Fan sysfs interfaces + * ix = [0-1] + * --------------------------------------------------------------------- */ + +#define SHOW_FAN_INPUT 0 +#define SHOW_SET_FAN_MIN 1 +#define SHOW_SET_FAN_DIV 2 +#define SHOW_FAN_ALARM 3 + +static ssize_t show_fan(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + int res; + + switch (fn) { + case SHOW_FAN_INPUT: + res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]); + break; + case SHOW_SET_FAN_MIN: + res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]); + break; + case SHOW_SET_FAN_DIV: + res = DIV_FROM_REG(data->fan_div[ix]); + break; + case SHOW_FAN_ALARM: + res = (data->alarms >> bitalarmfan[ix]) & 1; + break; + default: + res = 0; + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + + return sprintf(buf, "%d\n", res); +} + +static ssize_t set_fan(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + int reg; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + + /* sync the data cache */ + reg = vt1211_read8(data, VT1211_REG_FAN_DIV); + data->fan_div[0] = (reg >> 4) & 3; + data->fan_div[1] = (reg >> 6) & 3; + data->fan_ctl = reg & 0xf; + + switch (fn) { + case SHOW_SET_FAN_MIN: + data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]); + vt1211_write8(data, VT1211_REG_FAN_MIN(ix), + data->fan_min[ix]); + break; + case SHOW_SET_FAN_DIV: + switch (val) { + case 1: + data->fan_div[ix] = 0; + break; + case 2: + data->fan_div[ix] = 1; + break; + case 4: + data->fan_div[ix] = 2; + break; + case 8: + data->fan_div[ix] = 3; + break; + default: + count = -EINVAL; + dev_warn(dev, + "fan div value %ld not supported. Choose one of 1, 2, 4, or 8.\n", + val); + goto EXIT; + } + vt1211_write8(data, VT1211_REG_FAN_DIV, + ((data->fan_div[1] << 6) | + (data->fan_div[0] << 4) | + data->fan_ctl)); + break; + default: + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + +EXIT: + mutex_unlock(&data->update_lock); + return count; +} + +/* --------------------------------------------------------------------- + * PWM sysfs interfaces + * ix = [0-1] + * --------------------------------------------------------------------- */ + +#define SHOW_PWM 0 +#define SHOW_SET_PWM_ENABLE 1 +#define SHOW_SET_PWM_FREQ 2 +#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3 + +static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + int res; + + switch (fn) { + case SHOW_PWM: + res = data->pwm[ix]; + break; + case SHOW_SET_PWM_ENABLE: + res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0; + break; + case SHOW_SET_PWM_FREQ: + res = 90000 >> (data->pwm_clk & 7); + break; + case SHOW_SET_PWM_AUTO_CHANNELS_TEMP: + res = (data->pwm_ctl[ix] & 7) + 1; + break; + default: + res = 0; + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + + return sprintf(buf, "%d\n", res); +} + +static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int fn = sensor_attr_2->nr; + int tmp, reg; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + + switch (fn) { + case SHOW_SET_PWM_ENABLE: + /* sync the data cache */ + reg = vt1211_read8(data, VT1211_REG_FAN_DIV); + data->fan_div[0] = (reg >> 4) & 3; + data->fan_div[1] = (reg >> 6) & 3; + data->fan_ctl = reg & 0xf; + reg = vt1211_read8(data, VT1211_REG_PWM_CTL); + data->pwm_ctl[0] = reg & 0xf; + data->pwm_ctl[1] = (reg >> 4) & 0xf; + switch (val) { + case 0: + data->pwm_ctl[ix] &= 7; + /* + * disable SmartGuardian if both PWM outputs are + * disabled + */ + if ((data->pwm_ctl[ix ^ 1] & 1) == 0) + data->fan_ctl &= 0xe; + break; + case 2: + data->pwm_ctl[ix] |= 8; + data->fan_ctl |= 1; + break; + default: + count = -EINVAL; + dev_warn(dev, + "pwm mode %ld not supported. Choose one of 0 or 2.\n", + val); + goto EXIT; + } + vt1211_write8(data, VT1211_REG_PWM_CTL, + ((data->pwm_ctl[1] << 4) | + data->pwm_ctl[0])); + vt1211_write8(data, VT1211_REG_FAN_DIV, + ((data->fan_div[1] << 6) | + (data->fan_div[0] << 4) | + data->fan_ctl)); + break; + case SHOW_SET_PWM_FREQ: + val = 135000 / clamp_val(val, 135000 >> 7, 135000); + /* calculate tmp = log2(val) */ + tmp = 0; + for (val >>= 1; val > 0; val >>= 1) + tmp++; + /* sync the data cache */ + reg = vt1211_read8(data, VT1211_REG_PWM_CLK); + data->pwm_clk = (reg & 0xf8) | tmp; + vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk); + break; + case SHOW_SET_PWM_AUTO_CHANNELS_TEMP: + if (val < 1 || val > 7) { + count = -EINVAL; + dev_warn(dev, + "temp channel %ld not supported. Choose a value between 1 and 7.\n", + val); + goto EXIT; + } + if (!ISTEMP(val - 1, data->uch_config)) { + count = -EINVAL; + dev_warn(dev, "temp channel %ld is not available.\n", + val); + goto EXIT; + } + /* sync the data cache */ + reg = vt1211_read8(data, VT1211_REG_PWM_CTL); + data->pwm_ctl[0] = reg & 0xf; + data->pwm_ctl[1] = (reg >> 4) & 0xf; + data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1); + vt1211_write8(data, VT1211_REG_PWM_CTL, + ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0])); + break; + default: + dev_dbg(dev, "Unknown attr fetch (%d)\n", fn); + } + +EXIT: + mutex_unlock(&data->update_lock); + return count; +} + +/* --------------------------------------------------------------------- + * PWM auto point definitions + * ix = [0-1] + * ap = [0-3] + * --------------------------------------------------------------------- */ + +/* + * pwm[ix+1]_auto_point[ap+1]_temp mapping table: + * Note that there is only a single set of temp auto points that controls both + * PWM controllers. We still create 2 sets of sysfs files to make it look + * more consistent even though they map to the same registers. + * + * ix ap : description + * ------------------- + * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0]) + * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) + * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) + * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) + * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0]) + * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1]) + * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2]) + * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3]) + */ + +static ssize_t show_pwm_auto_point_temp(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int ap = sensor_attr_2->nr; + + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7, + data->pwm_auto_temp[ap])); +} + +static ssize_t set_pwm_auto_point_temp(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int ap = sensor_attr_2->nr; + int reg; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + + mutex_lock(&data->update_lock); + + /* sync the data cache */ + reg = vt1211_read8(data, VT1211_REG_PWM_CTL); + data->pwm_ctl[0] = reg & 0xf; + data->pwm_ctl[1] = (reg >> 4) & 0xf; + + data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val); + vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap), + data->pwm_auto_temp[ap]); + mutex_unlock(&data->update_lock); + + return count; +} + +/* + * pwm[ix+1]_auto_point[ap+1]_pwm mapping table: + * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't + * be changed. + * + * ix ap : description + * ------------------- + * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0) + * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1]) + * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2]) + * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255) + * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0) + * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1]) + * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2]) + * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255) + */ + +static ssize_t show_pwm_auto_point_pwm(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int ap = sensor_attr_2->nr; + + return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]); +} + +static ssize_t set_pwm_auto_point_pwm(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sensor_attr_2 = + to_sensor_dev_attr_2(attr); + int ix = sensor_attr_2->index; + int ap = sensor_attr_2->nr; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255); + vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap), + data->pwm_auto_pwm[ix][ap]); + mutex_unlock(&data->update_lock); + + return count; +} + +/* --------------------------------------------------------------------- + * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms) + * --------------------------------------------------------------------- */ + +static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", data->vrm); +} + +static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + if (val > 255) + return -EINVAL; + + data->vrm = val; + + return count; +} + +static ssize_t show_vid(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); +} + +static ssize_t show_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct vt1211_data *data = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", data->name); +} + +static ssize_t show_alarms(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct vt1211_data *data = vt1211_update_device(dev); + + return sprintf(buf, "%d\n", data->alarms); +} + +/* --------------------------------------------------------------------- + * Device attribute structs + * --------------------------------------------------------------------- */ + +#define SENSOR_ATTR_IN(ix) \ +{ SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \ + show_in, NULL, SHOW_IN_INPUT, ix), \ + SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \ + show_in, set_in, SHOW_SET_IN_MIN, ix), \ + SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \ + show_in, set_in, SHOW_SET_IN_MAX, ix), \ + SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \ + show_in, NULL, SHOW_IN_ALARM, ix) \ +} + +static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = { + SENSOR_ATTR_IN(0), + SENSOR_ATTR_IN(1), + SENSOR_ATTR_IN(2), + SENSOR_ATTR_IN(3), + SENSOR_ATTR_IN(4), + SENSOR_ATTR_IN(5) +}; + +#define IN_UNIT_ATTRS(X) \ +{ &vt1211_sysfs_in[X][0].dev_attr.attr, \ + &vt1211_sysfs_in[X][1].dev_attr.attr, \ + &vt1211_sysfs_in[X][2].dev_attr.attr, \ + &vt1211_sysfs_in[X][3].dev_attr.attr, \ + NULL \ +} + +static struct attribute *vt1211_in_attr[][5] = { + IN_UNIT_ATTRS(0), + IN_UNIT_ATTRS(1), + IN_UNIT_ATTRS(2), + IN_UNIT_ATTRS(3), + IN_UNIT_ATTRS(4), + IN_UNIT_ATTRS(5) +}; + +static const struct attribute_group vt1211_in_attr_group[] = { + { .attrs = vt1211_in_attr[0] }, + { .attrs = vt1211_in_attr[1] }, + { .attrs = vt1211_in_attr[2] }, + { .attrs = vt1211_in_attr[3] }, + { .attrs = vt1211_in_attr[4] }, + { .attrs = vt1211_in_attr[5] } +}; + +#define SENSOR_ATTR_TEMP(ix) \ +{ SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \ + show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \ + SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \ + show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \ + SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \ + show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \ + SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \ + show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \ +} + +static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = { + SENSOR_ATTR_TEMP(1), + SENSOR_ATTR_TEMP(2), + SENSOR_ATTR_TEMP(3), + SENSOR_ATTR_TEMP(4), + SENSOR_ATTR_TEMP(5), + SENSOR_ATTR_TEMP(6), + SENSOR_ATTR_TEMP(7), +}; + +#define TEMP_UNIT_ATTRS(X) \ +{ &vt1211_sysfs_temp[X][0].dev_attr.attr, \ + &vt1211_sysfs_temp[X][1].dev_attr.attr, \ + &vt1211_sysfs_temp[X][2].dev_attr.attr, \ + &vt1211_sysfs_temp[X][3].dev_attr.attr, \ + NULL \ +} + +static struct attribute *vt1211_temp_attr[][5] = { + TEMP_UNIT_ATTRS(0), + TEMP_UNIT_ATTRS(1), + TEMP_UNIT_ATTRS(2), + TEMP_UNIT_ATTRS(3), + TEMP_UNIT_ATTRS(4), + TEMP_UNIT_ATTRS(5), + TEMP_UNIT_ATTRS(6) +}; + +static const struct attribute_group vt1211_temp_attr_group[] = { + { .attrs = vt1211_temp_attr[0] }, + { .attrs = vt1211_temp_attr[1] }, + { .attrs = vt1211_temp_attr[2] }, + { .attrs = vt1211_temp_attr[3] }, + { .attrs = vt1211_temp_attr[4] }, + { .attrs = vt1211_temp_attr[5] }, + { .attrs = vt1211_temp_attr[6] } +}; + +#define SENSOR_ATTR_FAN(ix) \ + SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \ + show_fan, NULL, SHOW_FAN_INPUT, ix-1), \ + SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \ + show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \ + SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \ + show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \ + SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \ + show_fan, NULL, SHOW_FAN_ALARM, ix-1) + +#define SENSOR_ATTR_PWM(ix) \ + SENSOR_ATTR_2(pwm##ix, S_IRUGO, \ + show_pwm, NULL, SHOW_PWM, ix-1), \ + SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \ + show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \ + SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \ + show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1) + +#define SENSOR_ATTR_PWM_FREQ(ix) \ + SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \ + show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1) + +#define SENSOR_ATTR_PWM_FREQ_RO(ix) \ + SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \ + show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1) + +#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \ + SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \ + show_pwm_auto_point_temp, set_pwm_auto_point_temp, \ + ap-1, ix-1) + +#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \ + SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \ + show_pwm_auto_point_temp, NULL, \ + ap-1, ix-1) + +#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \ + SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \ + show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \ + ap-1, ix-1) + +#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \ + SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \ + show_pwm_auto_point_pwm, NULL, \ + ap-1, ix-1) + +static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = { + SENSOR_ATTR_FAN(1), + SENSOR_ATTR_FAN(2), + SENSOR_ATTR_PWM(1), + SENSOR_ATTR_PWM(2), + SENSOR_ATTR_PWM_FREQ(1), + SENSOR_ATTR_PWM_FREQ_RO(2), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3), + SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4), + SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1), + SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2), + SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3), + SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4), + SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1), + SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2), + SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3), + SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4), +}; + +static struct device_attribute vt1211_sysfs_misc[] = { + __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm), + __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL), + __ATTR(name, S_IRUGO, show_name, NULL), + __ATTR(alarms, S_IRUGO, show_alarms, NULL), +}; + +/* --------------------------------------------------------------------- + * Device registration and initialization + * --------------------------------------------------------------------- */ + +static void vt1211_init_device(struct vt1211_data *data) +{ + /* set VRM */ + data->vrm = vid_which_vrm(); + + /* Read (and initialize) UCH config */ + data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG); + if (uch_config > -1) { + data->uch_config = (data->uch_config & 0x83) | + (uch_config << 2); + vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config); + } + + /* + * Initialize the interrupt mode (if request at module load time). + * The VT1211 implements 3 different modes for clearing interrupts: + * 0: Clear INT when status register is read. Regenerate INT as long + * as temp stays above hysteresis limit. + * 1: Clear INT when status register is read. DON'T regenerate INT + * until temp falls below hysteresis limit and exceeds hot limit + * again. + * 2: Clear INT when temp falls below max limit. + * + * The driver only allows to force mode 0 since that's the only one + * that makes sense for 'sensors' + */ + if (int_mode == 0) { + vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0); + vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0); + } + + /* Fill in some hard wired values into our data struct */ + data->pwm_auto_pwm[0][3] = 255; + data->pwm_auto_pwm[1][3] = 255; +} + +static void vt1211_remove_sysfs(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + int i; + + for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) + sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]); + + for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) + sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]); + + for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) { + device_remove_file(dev, + &vt1211_sysfs_fan_pwm[i].dev_attr); + } + for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) + device_remove_file(dev, &vt1211_sysfs_misc[i]); +} + +static int vt1211_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct vt1211_data *data; + struct resource *res; + int i, err; + + data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!devm_request_region(dev, res->start, resource_size(res), + DRVNAME)) { + dev_err(dev, "Failed to request region 0x%lx-0x%lx\n", + (unsigned long)res->start, (unsigned long)res->end); + return -EBUSY; + } + data->addr = res->start; + data->name = DRVNAME; + mutex_init(&data->update_lock); + + platform_set_drvdata(pdev, data); + + /* Initialize the VT1211 chip */ + vt1211_init_device(data); + + /* Create sysfs interface files */ + for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) { + if (ISVOLT(i, data->uch_config)) { + err = sysfs_create_group(&dev->kobj, + &vt1211_in_attr_group[i]); + if (err) + goto EXIT_DEV_REMOVE; + } + } + for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) { + if (ISTEMP(i, data->uch_config)) { + err = sysfs_create_group(&dev->kobj, + &vt1211_temp_attr_group[i]); + if (err) + goto EXIT_DEV_REMOVE; + } + } + for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) { + err = device_create_file(dev, + &vt1211_sysfs_fan_pwm[i].dev_attr); + if (err) + goto EXIT_DEV_REMOVE; + } + for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) { + err = device_create_file(dev, + &vt1211_sysfs_misc[i]); + if (err) + goto EXIT_DEV_REMOVE; + } + + /* Register device */ + data->hwmon_dev = hwmon_device_register(dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + dev_err(dev, "Class registration failed (%d)\n", err); + goto EXIT_DEV_REMOVE_SILENT; + } + + return 0; + +EXIT_DEV_REMOVE: + dev_err(dev, "Sysfs interface creation failed (%d)\n", err); +EXIT_DEV_REMOVE_SILENT: + vt1211_remove_sysfs(pdev); + return err; +} + +static int vt1211_remove(struct platform_device *pdev) +{ + struct vt1211_data *data = platform_get_drvdata(pdev); + + hwmon_device_unregister(data->hwmon_dev); + vt1211_remove_sysfs(pdev); + + return 0; +} + +static struct platform_driver vt1211_driver = { + .driver = { + .name = DRVNAME, + }, + .probe = vt1211_probe, + .remove = vt1211_remove, +}; + +static int __init vt1211_device_add(unsigned short address) +{ + struct resource res = { + .start = address, + .end = address + 0x7f, + .flags = IORESOURCE_IO, + }; + int err; + + pdev = platform_device_alloc(DRVNAME, address); + if (!pdev) { + err = -ENOMEM; + pr_err("Device allocation failed (%d)\n", err); + goto EXIT; + } + + res.name = pdev->name; + err = acpi_check_resource_conflict(&res); + if (err) + goto EXIT_DEV_PUT; + + err = platform_device_add_resources(pdev, &res, 1); + if (err) { + pr_err("Device resource addition failed (%d)\n", err); + goto EXIT_DEV_PUT; + } + + err = platform_device_add(pdev); + if (err) { + pr_err("Device addition failed (%d)\n", err); + goto EXIT_DEV_PUT; + } + + return 0; + +EXIT_DEV_PUT: + platform_device_put(pdev); +EXIT: + return err; +} + +static int __init vt1211_find(int sio_cip, unsigned short *address) +{ + int err; + int devid; + + err = superio_enter(sio_cip); + if (err) + return err; + + err = -ENODEV; + devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID); + if (devid != SIO_VT1211_ID) + goto EXIT; + + superio_select(sio_cip, SIO_VT1211_LDN_HWMON); + + if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) { + pr_warn("HW monitor is disabled, skipping\n"); + goto EXIT; + } + + *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) | + (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00; + if (*address == 0) { + pr_warn("Base address is not set, skipping\n"); + goto EXIT; + } + + err = 0; + pr_info("Found VT1211 chip at 0x%04x, revision %u\n", + *address, superio_inb(sio_cip, SIO_VT1211_DEVREV)); + +EXIT: + superio_exit(sio_cip); + return err; +} + +static int __init vt1211_init(void) +{ + int err; + unsigned short address = 0; + + err = vt1211_find(SIO_REG_CIP1, &address); + if (err) { + err = vt1211_find(SIO_REG_CIP2, &address); + if (err) + goto EXIT; + } + + if ((uch_config < -1) || (uch_config > 31)) { + err = -EINVAL; + pr_warn("Invalid UCH configuration %d. Choose a value between 0 and 31.\n", + uch_config); + goto EXIT; + } + + if ((int_mode < -1) || (int_mode > 0)) { + err = -EINVAL; + pr_warn("Invalid interrupt mode %d. Only mode 0 is supported.\n", + int_mode); + goto EXIT; + } + + err = platform_driver_register(&vt1211_driver); + if (err) + goto EXIT; + + /* Sets global pdev as a side effect */ + err = vt1211_device_add(address); + if (err) + goto EXIT_DRV_UNREGISTER; + + return 0; + +EXIT_DRV_UNREGISTER: + platform_driver_unregister(&vt1211_driver); +EXIT: + return err; +} + +static void __exit vt1211_exit(void) +{ + platform_device_unregister(pdev); + platform_driver_unregister(&vt1211_driver); +} + +MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>"); +MODULE_DESCRIPTION("VT1211 sensors"); +MODULE_LICENSE("GPL"); + +module_init(vt1211_init); +module_exit(vt1211_exit); |