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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
0004  *            monitoring features
0005  * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
0006  *
0007  * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
0008  * and its port to kernel 2.6 by Lars Ekman.
0009  */
0010 
0011 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0012 
0013 #include <linux/module.h>
0014 #include <linux/init.h>
0015 #include <linux/slab.h>
0016 #include <linux/jiffies.h>
0017 #include <linux/platform_device.h>
0018 #include <linux/hwmon.h>
0019 #include <linux/hwmon-sysfs.h>
0020 #include <linux/hwmon-vid.h>
0021 #include <linux/err.h>
0022 #include <linux/mutex.h>
0023 #include <linux/ioport.h>
0024 #include <linux/acpi.h>
0025 #include <linux/io.h>
0026 
0027 static int uch_config = -1;
0028 module_param(uch_config, int, 0);
0029 MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
0030 
0031 static int int_mode = -1;
0032 module_param(int_mode, int, 0);
0033 MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
0034 
0035 static unsigned short force_id;
0036 module_param(force_id, ushort, 0);
0037 MODULE_PARM_DESC(force_id, "Override the detected device ID");
0038 
0039 static struct platform_device *pdev;
0040 
0041 #define DRVNAME "vt1211"
0042 
0043 /* ---------------------------------------------------------------------
0044  * Registers
0045  *
0046  * The sensors are defined as follows.
0047  *
0048  * Sensor          Voltage Mode   Temp Mode   Notes (from the datasheet)
0049  * --------        ------------   ---------   --------------------------
0050  * Reading 1                      temp1       Intel thermal diode
0051  * Reading 3                      temp2       Internal thermal diode
0052  * UCH1/Reading2   in0            temp3       NTC type thermistor
0053  * UCH2            in1            temp4       +2.5V
0054  * UCH3            in2            temp5       VccP
0055  * UCH4            in3            temp6       +5V
0056  * UCH5            in4            temp7       +12V
0057  * 3.3V            in5                        Internal VDD (+3.3V)
0058  *
0059  * --------------------------------------------------------------------- */
0060 
0061 /* Voltages (in) numbered 0-5 (ix) */
0062 #define VT1211_REG_IN(ix)       (0x21 + (ix))
0063 #define VT1211_REG_IN_MIN(ix)       ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
0064 #define VT1211_REG_IN_MAX(ix)       ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
0065 
0066 /* Temperatures (temp) numbered 0-6 (ix) */
0067 static u8 regtemp[] = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
0068 static u8 regtempmax[]  = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
0069 static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
0070 
0071 /* Fans numbered 0-1 (ix) */
0072 #define VT1211_REG_FAN(ix)      (0x29 + (ix))
0073 #define VT1211_REG_FAN_MIN(ix)      (0x3b + (ix))
0074 #define VT1211_REG_FAN_DIV       0x47
0075 
0076 /* PWMs numbered 0-1 (ix) */
0077 /* Auto points numbered 0-3 (ap) */
0078 #define VT1211_REG_PWM(ix)      (0x60 + (ix))
0079 #define VT1211_REG_PWM_CLK       0x50
0080 #define VT1211_REG_PWM_CTL       0x51
0081 #define VT1211_REG_PWM_AUTO_TEMP(ap)    (0x55 - (ap))
0082 #define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap))
0083 
0084 /* Miscellaneous registers */
0085 #define VT1211_REG_CONFIG       0x40
0086 #define VT1211_REG_ALARM1       0x41
0087 #define VT1211_REG_ALARM2       0x42
0088 #define VT1211_REG_VID          0x45
0089 #define VT1211_REG_UCH_CONFIG       0x4a
0090 #define VT1211_REG_TEMP1_CONFIG     0x4b
0091 #define VT1211_REG_TEMP2_CONFIG     0x4c
0092 
0093 /* In, temp & fan alarm bits */
0094 static const u8 bitalarmin[]    = {11, 0, 1, 3, 8, 2, 9};
0095 static const u8 bitalarmtemp[]  = {4, 15, 11, 0, 1, 3, 8};
0096 static const u8 bitalarmfan[]   = {6, 7};
0097 
0098 /* ---------------------------------------------------------------------
0099  * Data structures and manipulation thereof
0100  * --------------------------------------------------------------------- */
0101 
0102 struct vt1211_data {
0103     unsigned short addr;
0104     const char *name;
0105     struct device *hwmon_dev;
0106 
0107     struct mutex update_lock;
0108     bool valid;         /* true if following fields are valid */
0109     unsigned long last_updated; /* In jiffies */
0110 
0111     /* Register values */
0112     u8  in[6];
0113     u8  in_max[6];
0114     u8  in_min[6];
0115     u8  temp[7];
0116     u8  temp_max[7];
0117     u8  temp_hyst[7];
0118     u8  fan[2];
0119     u8  fan_min[2];
0120     u8  fan_div[2];
0121     u8  fan_ctl;
0122     u8  pwm[2];
0123     u8  pwm_ctl[2];
0124     u8  pwm_clk;
0125     u8  pwm_auto_temp[4];
0126     u8  pwm_auto_pwm[2][4];
0127     u8  vid;        /* Read once at init time */
0128     u8  vrm;
0129     u8  uch_config;     /* Read once at init time */
0130     u16 alarms;
0131 };
0132 
0133 /* ix = [0-5] */
0134 #define ISVOLT(ix, uch_config)  ((ix) > 4 ? 1 : \
0135                  !(((uch_config) >> ((ix) + 2)) & 1))
0136 
0137 /* ix = [0-6] */
0138 #define ISTEMP(ix, uch_config)  ((ix) < 2 ? 1 : \
0139                  ((uch_config) >> (ix)) & 1)
0140 
0141 /*
0142  * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
0143  * driver according to the VT1211 BIOS porting guide
0144  */
0145 #define IN_FROM_REG(ix, reg)    ((reg) < 3 ? 0 : (ix) == 5 ? \
0146                  (((reg) - 3) * 15882 + 479) / 958 : \
0147                  (((reg) - 3) * 10000 + 479) / 958)
0148 #define IN_TO_REG(ix, val)  (clamp_val((ix) == 5 ? \
0149                  ((val) * 958 + 7941) / 15882 + 3 : \
0150                  ((val) * 958 + 5000) / 10000 + 3, 0, 255))
0151 
0152 /*
0153  * temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
0154  * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
0155  * according to some measurements that I took on an EPIA M10000.
0156  * temp3-7 are thermistor based so the driver returns the voltage measured at
0157  * the pin (range 0V - 2.2V).
0158  */
0159 #define TEMP_FROM_REG(ix, reg)  ((ix) == 0 ? (reg) * 1000 : \
0160                  (ix) == 1 ? (reg) < 51 ? 0 : \
0161                  ((reg) - 51) * 1000 : \
0162                  ((253 - (reg)) * 2200 + 105) / 210)
0163 #define TEMP_TO_REG(ix, val)    clamp_val( \
0164                  ((ix) == 0 ? ((val) + 500) / 1000 : \
0165                   (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
0166                   253 - ((val) * 210 + 1100) / 2200), 0, 255)
0167 
0168 #define DIV_FROM_REG(reg)   (1 << (reg))
0169 
0170 #define RPM_FROM_REG(reg, div)  (((reg) == 0) || ((reg) == 255) ? 0 : \
0171                  1310720 / (reg) / DIV_FROM_REG(div))
0172 #define RPM_TO_REG(val, div)    ((val) == 0 ? 255 : \
0173                  clamp_val((1310720 / (val) / \
0174                  DIV_FROM_REG(div)), 1, 254))
0175 
0176 /* ---------------------------------------------------------------------
0177  * Super-I/O constants and functions
0178  * --------------------------------------------------------------------- */
0179 
0180 /*
0181  * Configuration index port registers
0182  * The vt1211 can live at 2 different addresses so we need to probe both
0183  */
0184 #define SIO_REG_CIP1        0x2e
0185 #define SIO_REG_CIP2        0x4e
0186 
0187 /* Configuration registers */
0188 #define SIO_VT1211_LDN      0x07    /* logical device number */
0189 #define SIO_VT1211_DEVID    0x20    /* device ID */
0190 #define SIO_VT1211_DEVREV   0x21    /* device revision */
0191 #define SIO_VT1211_ACTIVE   0x30    /* HW monitor active */
0192 #define SIO_VT1211_BADDR    0x60    /* base I/O address */
0193 #define SIO_VT1211_ID       0x3c    /* VT1211 device ID */
0194 
0195 /* VT1211 logical device numbers */
0196 #define SIO_VT1211_LDN_HWMON    0x0b    /* HW monitor */
0197 
0198 static inline void superio_outb(int sio_cip, int reg, int val)
0199 {
0200     outb(reg, sio_cip);
0201     outb(val, sio_cip + 1);
0202 }
0203 
0204 static inline int superio_inb(int sio_cip, int reg)
0205 {
0206     outb(reg, sio_cip);
0207     return inb(sio_cip + 1);
0208 }
0209 
0210 static inline void superio_select(int sio_cip, int ldn)
0211 {
0212     outb(SIO_VT1211_LDN, sio_cip);
0213     outb(ldn, sio_cip + 1);
0214 }
0215 
0216 static inline int superio_enter(int sio_cip)
0217 {
0218     if (!request_muxed_region(sio_cip, 2, DRVNAME))
0219         return -EBUSY;
0220 
0221     outb(0x87, sio_cip);
0222     outb(0x87, sio_cip);
0223 
0224     return 0;
0225 }
0226 
0227 static inline void superio_exit(int sio_cip)
0228 {
0229     outb(0xaa, sio_cip);
0230     release_region(sio_cip, 2);
0231 }
0232 
0233 /* ---------------------------------------------------------------------
0234  * Device I/O access
0235  * --------------------------------------------------------------------- */
0236 
0237 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
0238 {
0239     return inb(data->addr + reg);
0240 }
0241 
0242 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
0243 {
0244     outb(val, data->addr + reg);
0245 }
0246 
0247 static struct vt1211_data *vt1211_update_device(struct device *dev)
0248 {
0249     struct vt1211_data *data = dev_get_drvdata(dev);
0250     int ix, val;
0251 
0252     mutex_lock(&data->update_lock);
0253 
0254     /* registers cache is refreshed after 1 second */
0255     if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
0256         /* read VID */
0257         data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
0258 
0259         /* voltage (in) registers */
0260         for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
0261             if (ISVOLT(ix, data->uch_config)) {
0262                 data->in[ix] = vt1211_read8(data,
0263                         VT1211_REG_IN(ix));
0264                 data->in_min[ix] = vt1211_read8(data,
0265                         VT1211_REG_IN_MIN(ix));
0266                 data->in_max[ix] = vt1211_read8(data,
0267                         VT1211_REG_IN_MAX(ix));
0268             }
0269         }
0270 
0271         /* temp registers */
0272         for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
0273             if (ISTEMP(ix, data->uch_config)) {
0274                 data->temp[ix] = vt1211_read8(data,
0275                         regtemp[ix]);
0276                 data->temp_max[ix] = vt1211_read8(data,
0277                         regtempmax[ix]);
0278                 data->temp_hyst[ix] = vt1211_read8(data,
0279                         regtemphyst[ix]);
0280             }
0281         }
0282 
0283         /* fan & pwm registers */
0284         for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
0285             data->fan[ix] = vt1211_read8(data,
0286                         VT1211_REG_FAN(ix));
0287             data->fan_min[ix] = vt1211_read8(data,
0288                         VT1211_REG_FAN_MIN(ix));
0289             data->pwm[ix] = vt1211_read8(data,
0290                         VT1211_REG_PWM(ix));
0291         }
0292         val = vt1211_read8(data, VT1211_REG_FAN_DIV);
0293         data->fan_div[0] = (val >> 4) & 3;
0294         data->fan_div[1] = (val >> 6) & 3;
0295         data->fan_ctl = val & 0xf;
0296 
0297         val = vt1211_read8(data, VT1211_REG_PWM_CTL);
0298         data->pwm_ctl[0] = val & 0xf;
0299         data->pwm_ctl[1] = (val >> 4) & 0xf;
0300 
0301         data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
0302 
0303         /* pwm & temp auto point registers */
0304         data->pwm_auto_pwm[0][1] = vt1211_read8(data,
0305                         VT1211_REG_PWM_AUTO_PWM(0, 1));
0306         data->pwm_auto_pwm[0][2] = vt1211_read8(data,
0307                         VT1211_REG_PWM_AUTO_PWM(0, 2));
0308         data->pwm_auto_pwm[1][1] = vt1211_read8(data,
0309                         VT1211_REG_PWM_AUTO_PWM(1, 1));
0310         data->pwm_auto_pwm[1][2] = vt1211_read8(data,
0311                         VT1211_REG_PWM_AUTO_PWM(1, 2));
0312         for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
0313             data->pwm_auto_temp[ix] = vt1211_read8(data,
0314                         VT1211_REG_PWM_AUTO_TEMP(ix));
0315         }
0316 
0317         /* alarm registers */
0318         data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
0319                 vt1211_read8(data, VT1211_REG_ALARM1);
0320 
0321         data->last_updated = jiffies;
0322         data->valid = true;
0323     }
0324 
0325     mutex_unlock(&data->update_lock);
0326 
0327     return data;
0328 }
0329 
0330 /* ---------------------------------------------------------------------
0331  * Voltage sysfs interfaces
0332  * ix = [0-5]
0333  * --------------------------------------------------------------------- */
0334 
0335 #define SHOW_IN_INPUT   0
0336 #define SHOW_SET_IN_MIN 1
0337 #define SHOW_SET_IN_MAX 2
0338 #define SHOW_IN_ALARM   3
0339 
0340 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
0341                char *buf)
0342 {
0343     struct vt1211_data *data = vt1211_update_device(dev);
0344     struct sensor_device_attribute_2 *sensor_attr_2 =
0345                         to_sensor_dev_attr_2(attr);
0346     int ix = sensor_attr_2->index;
0347     int fn = sensor_attr_2->nr;
0348     int res;
0349 
0350     switch (fn) {
0351     case SHOW_IN_INPUT:
0352         res = IN_FROM_REG(ix, data->in[ix]);
0353         break;
0354     case SHOW_SET_IN_MIN:
0355         res = IN_FROM_REG(ix, data->in_min[ix]);
0356         break;
0357     case SHOW_SET_IN_MAX:
0358         res = IN_FROM_REG(ix, data->in_max[ix]);
0359         break;
0360     case SHOW_IN_ALARM:
0361         res = (data->alarms >> bitalarmin[ix]) & 1;
0362         break;
0363     default:
0364         res = 0;
0365         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0366     }
0367 
0368     return sprintf(buf, "%d\n", res);
0369 }
0370 
0371 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
0372               const char *buf, size_t count)
0373 {
0374     struct vt1211_data *data = dev_get_drvdata(dev);
0375     struct sensor_device_attribute_2 *sensor_attr_2 =
0376                         to_sensor_dev_attr_2(attr);
0377     int ix = sensor_attr_2->index;
0378     int fn = sensor_attr_2->nr;
0379     long val;
0380     int err;
0381 
0382     err = kstrtol(buf, 10, &val);
0383     if (err)
0384         return err;
0385 
0386     mutex_lock(&data->update_lock);
0387     switch (fn) {
0388     case SHOW_SET_IN_MIN:
0389         data->in_min[ix] = IN_TO_REG(ix, val);
0390         vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
0391         break;
0392     case SHOW_SET_IN_MAX:
0393         data->in_max[ix] = IN_TO_REG(ix, val);
0394         vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
0395         break;
0396     default:
0397         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0398     }
0399     mutex_unlock(&data->update_lock);
0400 
0401     return count;
0402 }
0403 
0404 /* ---------------------------------------------------------------------
0405  * Temperature sysfs interfaces
0406  * ix = [0-6]
0407  * --------------------------------------------------------------------- */
0408 
0409 #define SHOW_TEMP_INPUT     0
0410 #define SHOW_SET_TEMP_MAX   1
0411 #define SHOW_SET_TEMP_MAX_HYST  2
0412 #define SHOW_TEMP_ALARM     3
0413 
0414 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
0415              char *buf)
0416 {
0417     struct vt1211_data *data = vt1211_update_device(dev);
0418     struct sensor_device_attribute_2 *sensor_attr_2 =
0419                         to_sensor_dev_attr_2(attr);
0420     int ix = sensor_attr_2->index;
0421     int fn = sensor_attr_2->nr;
0422     int res;
0423 
0424     switch (fn) {
0425     case SHOW_TEMP_INPUT:
0426         res = TEMP_FROM_REG(ix, data->temp[ix]);
0427         break;
0428     case SHOW_SET_TEMP_MAX:
0429         res = TEMP_FROM_REG(ix, data->temp_max[ix]);
0430         break;
0431     case SHOW_SET_TEMP_MAX_HYST:
0432         res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
0433         break;
0434     case SHOW_TEMP_ALARM:
0435         res = (data->alarms >> bitalarmtemp[ix]) & 1;
0436         break;
0437     default:
0438         res = 0;
0439         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0440     }
0441 
0442     return sprintf(buf, "%d\n", res);
0443 }
0444 
0445 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
0446             const char *buf, size_t count)
0447 {
0448     struct vt1211_data *data = dev_get_drvdata(dev);
0449     struct sensor_device_attribute_2 *sensor_attr_2 =
0450                         to_sensor_dev_attr_2(attr);
0451     int ix = sensor_attr_2->index;
0452     int fn = sensor_attr_2->nr;
0453     long val;
0454     int err;
0455 
0456     err = kstrtol(buf, 10, &val);
0457     if (err)
0458         return err;
0459 
0460     mutex_lock(&data->update_lock);
0461     switch (fn) {
0462     case SHOW_SET_TEMP_MAX:
0463         data->temp_max[ix] = TEMP_TO_REG(ix, val);
0464         vt1211_write8(data, regtempmax[ix],
0465                   data->temp_max[ix]);
0466         break;
0467     case SHOW_SET_TEMP_MAX_HYST:
0468         data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
0469         vt1211_write8(data, regtemphyst[ix],
0470                   data->temp_hyst[ix]);
0471         break;
0472     default:
0473         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0474     }
0475     mutex_unlock(&data->update_lock);
0476 
0477     return count;
0478 }
0479 
0480 /* ---------------------------------------------------------------------
0481  * Fan sysfs interfaces
0482  * ix = [0-1]
0483  * --------------------------------------------------------------------- */
0484 
0485 #define SHOW_FAN_INPUT      0
0486 #define SHOW_SET_FAN_MIN    1
0487 #define SHOW_SET_FAN_DIV    2
0488 #define SHOW_FAN_ALARM      3
0489 
0490 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
0491             char *buf)
0492 {
0493     struct vt1211_data *data = vt1211_update_device(dev);
0494     struct sensor_device_attribute_2 *sensor_attr_2 =
0495                         to_sensor_dev_attr_2(attr);
0496     int ix = sensor_attr_2->index;
0497     int fn = sensor_attr_2->nr;
0498     int res;
0499 
0500     switch (fn) {
0501     case SHOW_FAN_INPUT:
0502         res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
0503         break;
0504     case SHOW_SET_FAN_MIN:
0505         res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
0506         break;
0507     case SHOW_SET_FAN_DIV:
0508         res = DIV_FROM_REG(data->fan_div[ix]);
0509         break;
0510     case SHOW_FAN_ALARM:
0511         res = (data->alarms >> bitalarmfan[ix]) & 1;
0512         break;
0513     default:
0514         res = 0;
0515         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0516     }
0517 
0518     return sprintf(buf, "%d\n", res);
0519 }
0520 
0521 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
0522                const char *buf, size_t count)
0523 {
0524     struct vt1211_data *data = dev_get_drvdata(dev);
0525     struct sensor_device_attribute_2 *sensor_attr_2 =
0526                         to_sensor_dev_attr_2(attr);
0527     int ix = sensor_attr_2->index;
0528     int fn = sensor_attr_2->nr;
0529     int reg;
0530     unsigned long val;
0531     int err;
0532 
0533     err = kstrtoul(buf, 10, &val);
0534     if (err)
0535         return err;
0536 
0537     mutex_lock(&data->update_lock);
0538 
0539     /* sync the data cache */
0540     reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
0541     data->fan_div[0] = (reg >> 4) & 3;
0542     data->fan_div[1] = (reg >> 6) & 3;
0543     data->fan_ctl = reg & 0xf;
0544 
0545     switch (fn) {
0546     case SHOW_SET_FAN_MIN:
0547         data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
0548         vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
0549                   data->fan_min[ix]);
0550         break;
0551     case SHOW_SET_FAN_DIV:
0552         switch (val) {
0553         case 1:
0554             data->fan_div[ix] = 0;
0555             break;
0556         case 2:
0557             data->fan_div[ix] = 1;
0558             break;
0559         case 4:
0560             data->fan_div[ix] = 2;
0561             break;
0562         case 8:
0563             data->fan_div[ix] = 3;
0564             break;
0565         default:
0566             count = -EINVAL;
0567             dev_warn(dev,
0568                  "fan div value %ld not supported. Choose one of 1, 2, 4, or 8.\n",
0569                  val);
0570             goto EXIT;
0571         }
0572         vt1211_write8(data, VT1211_REG_FAN_DIV,
0573                   ((data->fan_div[1] << 6) |
0574                    (data->fan_div[0] << 4) |
0575                 data->fan_ctl));
0576         break;
0577     default:
0578         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0579     }
0580 
0581 EXIT:
0582     mutex_unlock(&data->update_lock);
0583     return count;
0584 }
0585 
0586 /* ---------------------------------------------------------------------
0587  * PWM sysfs interfaces
0588  * ix = [0-1]
0589  * --------------------------------------------------------------------- */
0590 
0591 #define SHOW_PWM            0
0592 #define SHOW_SET_PWM_ENABLE     1
0593 #define SHOW_SET_PWM_FREQ       2
0594 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
0595 
0596 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
0597             char *buf)
0598 {
0599     struct vt1211_data *data = vt1211_update_device(dev);
0600     struct sensor_device_attribute_2 *sensor_attr_2 =
0601                         to_sensor_dev_attr_2(attr);
0602     int ix = sensor_attr_2->index;
0603     int fn = sensor_attr_2->nr;
0604     int res;
0605 
0606     switch (fn) {
0607     case SHOW_PWM:
0608         res = data->pwm[ix];
0609         break;
0610     case SHOW_SET_PWM_ENABLE:
0611         res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
0612         break;
0613     case SHOW_SET_PWM_FREQ:
0614         res = 90000 >> (data->pwm_clk & 7);
0615         break;
0616     case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
0617         res = (data->pwm_ctl[ix] & 7) + 1;
0618         break;
0619     default:
0620         res = 0;
0621         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0622     }
0623 
0624     return sprintf(buf, "%d\n", res);
0625 }
0626 
0627 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
0628                const char *buf, size_t count)
0629 {
0630     struct vt1211_data *data = dev_get_drvdata(dev);
0631     struct sensor_device_attribute_2 *sensor_attr_2 =
0632                         to_sensor_dev_attr_2(attr);
0633     int ix = sensor_attr_2->index;
0634     int fn = sensor_attr_2->nr;
0635     int tmp, reg;
0636     unsigned long val;
0637     int err;
0638 
0639     err = kstrtoul(buf, 10, &val);
0640     if (err)
0641         return err;
0642 
0643     mutex_lock(&data->update_lock);
0644 
0645     switch (fn) {
0646     case SHOW_SET_PWM_ENABLE:
0647         /* sync the data cache */
0648         reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
0649         data->fan_div[0] = (reg >> 4) & 3;
0650         data->fan_div[1] = (reg >> 6) & 3;
0651         data->fan_ctl = reg & 0xf;
0652         reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
0653         data->pwm_ctl[0] = reg & 0xf;
0654         data->pwm_ctl[1] = (reg >> 4) & 0xf;
0655         switch (val) {
0656         case 0:
0657             data->pwm_ctl[ix] &= 7;
0658             /*
0659              * disable SmartGuardian if both PWM outputs are
0660              * disabled
0661              */
0662             if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
0663                 data->fan_ctl &= 0xe;
0664             break;
0665         case 2:
0666             data->pwm_ctl[ix] |= 8;
0667             data->fan_ctl |= 1;
0668             break;
0669         default:
0670             count = -EINVAL;
0671             dev_warn(dev,
0672                  "pwm mode %ld not supported. Choose one of 0 or 2.\n",
0673                  val);
0674             goto EXIT;
0675         }
0676         vt1211_write8(data, VT1211_REG_PWM_CTL,
0677                   ((data->pwm_ctl[1] << 4) |
0678                 data->pwm_ctl[0]));
0679         vt1211_write8(data, VT1211_REG_FAN_DIV,
0680                   ((data->fan_div[1] << 6) |
0681                    (data->fan_div[0] << 4) |
0682                 data->fan_ctl));
0683         break;
0684     case SHOW_SET_PWM_FREQ:
0685         val = 135000 / clamp_val(val, 135000 >> 7, 135000);
0686         /* calculate tmp = log2(val) */
0687         tmp = 0;
0688         for (val >>= 1; val > 0; val >>= 1)
0689             tmp++;
0690         /* sync the data cache */
0691         reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
0692         data->pwm_clk = (reg & 0xf8) | tmp;
0693         vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
0694         break;
0695     case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
0696         if (val < 1 || val > 7) {
0697             count = -EINVAL;
0698             dev_warn(dev,
0699                  "temp channel %ld not supported. Choose a value between 1 and 7.\n",
0700                  val);
0701             goto EXIT;
0702         }
0703         if (!ISTEMP(val - 1, data->uch_config)) {
0704             count = -EINVAL;
0705             dev_warn(dev, "temp channel %ld is not available.\n",
0706                  val);
0707             goto EXIT;
0708         }
0709         /* sync the data cache */
0710         reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
0711         data->pwm_ctl[0] = reg & 0xf;
0712         data->pwm_ctl[1] = (reg >> 4) & 0xf;
0713         data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
0714         vt1211_write8(data, VT1211_REG_PWM_CTL,
0715                   ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
0716         break;
0717     default:
0718         dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
0719     }
0720 
0721 EXIT:
0722     mutex_unlock(&data->update_lock);
0723     return count;
0724 }
0725 
0726 /* ---------------------------------------------------------------------
0727  * PWM auto point definitions
0728  * ix = [0-1]
0729  * ap = [0-3]
0730  * --------------------------------------------------------------------- */
0731 
0732 /*
0733  * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
0734  * Note that there is only a single set of temp auto points that controls both
0735  * PWM controllers. We still create 2 sets of sysfs files to make it look
0736  * more consistent even though they map to the same registers.
0737  *
0738  * ix ap : description
0739  * -------------------
0740  * 0  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
0741  * 0  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
0742  * 0  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
0743  * 0  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
0744  * 1  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
0745  * 1  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
0746  * 1  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
0747  * 1  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
0748  */
0749 
0750 static ssize_t show_pwm_auto_point_temp(struct device *dev,
0751                     struct device_attribute *attr,
0752                     char *buf)
0753 {
0754     struct vt1211_data *data = vt1211_update_device(dev);
0755     struct sensor_device_attribute_2 *sensor_attr_2 =
0756                         to_sensor_dev_attr_2(attr);
0757     int ix = sensor_attr_2->index;
0758     int ap = sensor_attr_2->nr;
0759 
0760     return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
0761                data->pwm_auto_temp[ap]));
0762 }
0763 
0764 static ssize_t set_pwm_auto_point_temp(struct device *dev,
0765                        struct device_attribute *attr,
0766                        const char *buf, size_t count)
0767 {
0768     struct vt1211_data *data = dev_get_drvdata(dev);
0769     struct sensor_device_attribute_2 *sensor_attr_2 =
0770                         to_sensor_dev_attr_2(attr);
0771     int ix = sensor_attr_2->index;
0772     int ap = sensor_attr_2->nr;
0773     int reg;
0774     long val;
0775     int err;
0776 
0777     err = kstrtol(buf, 10, &val);
0778     if (err)
0779         return err;
0780 
0781 
0782     mutex_lock(&data->update_lock);
0783 
0784     /* sync the data cache */
0785     reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
0786     data->pwm_ctl[0] = reg & 0xf;
0787     data->pwm_ctl[1] = (reg >> 4) & 0xf;
0788 
0789     data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
0790     vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
0791               data->pwm_auto_temp[ap]);
0792     mutex_unlock(&data->update_lock);
0793 
0794     return count;
0795 }
0796 
0797 /*
0798  * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
0799  * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
0800  * be changed.
0801  *
0802  * ix ap : description
0803  * -------------------
0804  * 0  0  : pwm1 off                   (pwm_auto_pwm[0][0], hard-wired to 0)
0805  * 0  1  : pwm1 low speed duty cycle  (pwm_auto_pwm[0][1])
0806  * 0  2  : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
0807  * 0  3  : pwm1 full speed            (pwm_auto_pwm[0][3], hard-wired to 255)
0808  * 1  0  : pwm2 off                   (pwm_auto_pwm[1][0], hard-wired to 0)
0809  * 1  1  : pwm2 low speed duty cycle  (pwm_auto_pwm[1][1])
0810  * 1  2  : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
0811  * 1  3  : pwm2 full speed            (pwm_auto_pwm[1][3], hard-wired to 255)
0812  */
0813 
0814 static ssize_t show_pwm_auto_point_pwm(struct device *dev,
0815                        struct device_attribute *attr,
0816                        char *buf)
0817 {
0818     struct vt1211_data *data = vt1211_update_device(dev);
0819     struct sensor_device_attribute_2 *sensor_attr_2 =
0820                         to_sensor_dev_attr_2(attr);
0821     int ix = sensor_attr_2->index;
0822     int ap = sensor_attr_2->nr;
0823 
0824     return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
0825 }
0826 
0827 static ssize_t set_pwm_auto_point_pwm(struct device *dev,
0828                       struct device_attribute *attr,
0829                       const char *buf, size_t count)
0830 {
0831     struct vt1211_data *data = dev_get_drvdata(dev);
0832     struct sensor_device_attribute_2 *sensor_attr_2 =
0833                         to_sensor_dev_attr_2(attr);
0834     int ix = sensor_attr_2->index;
0835     int ap = sensor_attr_2->nr;
0836     unsigned long val;
0837     int err;
0838 
0839     err = kstrtoul(buf, 10, &val);
0840     if (err)
0841         return err;
0842 
0843     mutex_lock(&data->update_lock);
0844     data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255);
0845     vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
0846               data->pwm_auto_pwm[ix][ap]);
0847     mutex_unlock(&data->update_lock);
0848 
0849     return count;
0850 }
0851 
0852 /* ---------------------------------------------------------------------
0853  * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
0854  * --------------------------------------------------------------------- */
0855 
0856 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
0857             char *buf)
0858 {
0859     struct vt1211_data *data = dev_get_drvdata(dev);
0860 
0861     return sprintf(buf, "%d\n", data->vrm);
0862 }
0863 
0864 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
0865                const char *buf, size_t count)
0866 {
0867     struct vt1211_data *data = dev_get_drvdata(dev);
0868     unsigned long val;
0869     int err;
0870 
0871     err = kstrtoul(buf, 10, &val);
0872     if (err)
0873         return err;
0874 
0875     if (val > 255)
0876         return -EINVAL;
0877 
0878     data->vrm = val;
0879 
0880     return count;
0881 }
0882 
0883 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
0884             char *buf)
0885 {
0886     struct vt1211_data *data = dev_get_drvdata(dev);
0887 
0888     return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
0889 }
0890 
0891 static ssize_t show_name(struct device *dev,
0892              struct device_attribute *attr, char *buf)
0893 {
0894     struct vt1211_data *data = dev_get_drvdata(dev);
0895 
0896     return sprintf(buf, "%s\n", data->name);
0897 }
0898 
0899 static ssize_t show_alarms(struct device *dev,
0900                struct device_attribute *attr, char *buf)
0901 {
0902     struct vt1211_data *data = vt1211_update_device(dev);
0903 
0904     return sprintf(buf, "%d\n", data->alarms);
0905 }
0906 
0907 /* ---------------------------------------------------------------------
0908  * Device attribute structs
0909  * --------------------------------------------------------------------- */
0910 
0911 #define SENSOR_ATTR_IN(ix) \
0912 {   SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
0913         show_in, NULL, SHOW_IN_INPUT, ix), \
0914     SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
0915         show_in, set_in, SHOW_SET_IN_MIN, ix), \
0916     SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
0917         show_in, set_in, SHOW_SET_IN_MAX, ix), \
0918     SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
0919         show_in, NULL, SHOW_IN_ALARM, ix) \
0920 }
0921 
0922 static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
0923     SENSOR_ATTR_IN(0),
0924     SENSOR_ATTR_IN(1),
0925     SENSOR_ATTR_IN(2),
0926     SENSOR_ATTR_IN(3),
0927     SENSOR_ATTR_IN(4),
0928     SENSOR_ATTR_IN(5)
0929 };
0930 
0931 #define IN_UNIT_ATTRS(X)            \
0932 {   &vt1211_sysfs_in[X][0].dev_attr.attr,   \
0933     &vt1211_sysfs_in[X][1].dev_attr.attr,   \
0934     &vt1211_sysfs_in[X][2].dev_attr.attr,   \
0935     &vt1211_sysfs_in[X][3].dev_attr.attr,   \
0936     NULL                    \
0937 }
0938 
0939 static struct attribute *vt1211_in_attr[][5] = {
0940     IN_UNIT_ATTRS(0),
0941     IN_UNIT_ATTRS(1),
0942     IN_UNIT_ATTRS(2),
0943     IN_UNIT_ATTRS(3),
0944     IN_UNIT_ATTRS(4),
0945     IN_UNIT_ATTRS(5)
0946 };
0947 
0948 static const struct attribute_group vt1211_in_attr_group[] = {
0949     { .attrs = vt1211_in_attr[0] },
0950     { .attrs = vt1211_in_attr[1] },
0951     { .attrs = vt1211_in_attr[2] },
0952     { .attrs = vt1211_in_attr[3] },
0953     { .attrs = vt1211_in_attr[4] },
0954     { .attrs = vt1211_in_attr[5] }
0955 };
0956 
0957 #define SENSOR_ATTR_TEMP(ix) \
0958 {   SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
0959         show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
0960     SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
0961         show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
0962     SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
0963         show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
0964     SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
0965         show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
0966 }
0967 
0968 static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
0969     SENSOR_ATTR_TEMP(1),
0970     SENSOR_ATTR_TEMP(2),
0971     SENSOR_ATTR_TEMP(3),
0972     SENSOR_ATTR_TEMP(4),
0973     SENSOR_ATTR_TEMP(5),
0974     SENSOR_ATTR_TEMP(6),
0975     SENSOR_ATTR_TEMP(7),
0976 };
0977 
0978 #define TEMP_UNIT_ATTRS(X)          \
0979 {   &vt1211_sysfs_temp[X][0].dev_attr.attr, \
0980     &vt1211_sysfs_temp[X][1].dev_attr.attr, \
0981     &vt1211_sysfs_temp[X][2].dev_attr.attr, \
0982     &vt1211_sysfs_temp[X][3].dev_attr.attr, \
0983     NULL                    \
0984 }
0985 
0986 static struct attribute *vt1211_temp_attr[][5] = {
0987     TEMP_UNIT_ATTRS(0),
0988     TEMP_UNIT_ATTRS(1),
0989     TEMP_UNIT_ATTRS(2),
0990     TEMP_UNIT_ATTRS(3),
0991     TEMP_UNIT_ATTRS(4),
0992     TEMP_UNIT_ATTRS(5),
0993     TEMP_UNIT_ATTRS(6)
0994 };
0995 
0996 static const struct attribute_group vt1211_temp_attr_group[] = {
0997     { .attrs = vt1211_temp_attr[0] },
0998     { .attrs = vt1211_temp_attr[1] },
0999     { .attrs = vt1211_temp_attr[2] },
1000     { .attrs = vt1211_temp_attr[3] },
1001     { .attrs = vt1211_temp_attr[4] },
1002     { .attrs = vt1211_temp_attr[5] },
1003     { .attrs = vt1211_temp_attr[6] }
1004 };
1005 
1006 #define SENSOR_ATTR_FAN(ix) \
1007     SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1008         show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1009     SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1010         show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1011     SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1012         show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1013     SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1014         show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1015 
1016 #define SENSOR_ATTR_PWM(ix) \
1017     SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1018         show_pwm, NULL, SHOW_PWM, ix-1), \
1019     SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1020         show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1021     SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1022         show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1023 
1024 #define SENSOR_ATTR_PWM_FREQ(ix) \
1025     SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1026         show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1027 
1028 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1029     SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1030         show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1031 
1032 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1033     SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1034         show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1035         ap-1, ix-1)
1036 
1037 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1038     SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1039         show_pwm_auto_point_temp, NULL, \
1040         ap-1, ix-1)
1041 
1042 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1043     SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1044         show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1045         ap-1, ix-1)
1046 
1047 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1048     SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1049         show_pwm_auto_point_pwm, NULL, \
1050         ap-1, ix-1)
1051 
1052 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1053     SENSOR_ATTR_FAN(1),
1054     SENSOR_ATTR_FAN(2),
1055     SENSOR_ATTR_PWM(1),
1056     SENSOR_ATTR_PWM(2),
1057     SENSOR_ATTR_PWM_FREQ(1),
1058     SENSOR_ATTR_PWM_FREQ_RO(2),
1059     SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1060     SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1061     SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1062     SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1063     SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1064     SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1065     SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1066     SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1067     SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1068     SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1069     SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1070     SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1071     SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1072     SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1073     SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1074     SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1075 };
1076 
1077 static struct device_attribute vt1211_sysfs_misc[] = {
1078     __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1079     __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1080     __ATTR(name, S_IRUGO, show_name, NULL),
1081     __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1082 };
1083 
1084 /* ---------------------------------------------------------------------
1085  * Device registration and initialization
1086  * --------------------------------------------------------------------- */
1087 
1088 static void vt1211_init_device(struct vt1211_data *data)
1089 {
1090     /* set VRM */
1091     data->vrm = vid_which_vrm();
1092 
1093     /* Read (and initialize) UCH config */
1094     data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1095     if (uch_config > -1) {
1096         data->uch_config = (data->uch_config & 0x83) |
1097                    (uch_config << 2);
1098         vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1099     }
1100 
1101     /*
1102      * Initialize the interrupt mode (if request at module load time).
1103      * The VT1211 implements 3 different modes for clearing interrupts:
1104      * 0: Clear INT when status register is read. Regenerate INT as long
1105      *    as temp stays above hysteresis limit.
1106      * 1: Clear INT when status register is read. DON'T regenerate INT
1107      *    until temp falls below hysteresis limit and exceeds hot limit
1108      *    again.
1109      * 2: Clear INT when temp falls below max limit.
1110      *
1111      * The driver only allows to force mode 0 since that's the only one
1112      * that makes sense for 'sensors'
1113      */
1114     if (int_mode == 0) {
1115         vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1116         vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1117     }
1118 
1119     /* Fill in some hard wired values into our data struct */
1120     data->pwm_auto_pwm[0][3] = 255;
1121     data->pwm_auto_pwm[1][3] = 255;
1122 }
1123 
1124 static void vt1211_remove_sysfs(struct platform_device *pdev)
1125 {
1126     struct device *dev = &pdev->dev;
1127     int i;
1128 
1129     for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1130         sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1131 
1132     for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1133         sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1134 
1135     for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1136         device_remove_file(dev,
1137             &vt1211_sysfs_fan_pwm[i].dev_attr);
1138     }
1139     for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1140         device_remove_file(dev, &vt1211_sysfs_misc[i]);
1141 }
1142 
1143 static int vt1211_probe(struct platform_device *pdev)
1144 {
1145     struct device *dev = &pdev->dev;
1146     struct vt1211_data *data;
1147     struct resource *res;
1148     int i, err;
1149 
1150     data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1151     if (!data)
1152         return -ENOMEM;
1153 
1154     res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1155     if (!devm_request_region(dev, res->start, resource_size(res),
1156                  DRVNAME)) {
1157         dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1158             (unsigned long)res->start, (unsigned long)res->end);
1159         return -EBUSY;
1160     }
1161     data->addr = res->start;
1162     data->name = DRVNAME;
1163     mutex_init(&data->update_lock);
1164 
1165     platform_set_drvdata(pdev, data);
1166 
1167     /* Initialize the VT1211 chip */
1168     vt1211_init_device(data);
1169 
1170     /* Create sysfs interface files */
1171     for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1172         if (ISVOLT(i, data->uch_config)) {
1173             err = sysfs_create_group(&dev->kobj,
1174                          &vt1211_in_attr_group[i]);
1175             if (err)
1176                 goto EXIT_DEV_REMOVE;
1177         }
1178     }
1179     for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1180         if (ISTEMP(i, data->uch_config)) {
1181             err = sysfs_create_group(&dev->kobj,
1182                          &vt1211_temp_attr_group[i]);
1183             if (err)
1184                 goto EXIT_DEV_REMOVE;
1185         }
1186     }
1187     for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1188         err = device_create_file(dev,
1189             &vt1211_sysfs_fan_pwm[i].dev_attr);
1190         if (err)
1191             goto EXIT_DEV_REMOVE;
1192     }
1193     for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1194         err = device_create_file(dev,
1195                &vt1211_sysfs_misc[i]);
1196         if (err)
1197             goto EXIT_DEV_REMOVE;
1198     }
1199 
1200     /* Register device */
1201     data->hwmon_dev = hwmon_device_register(dev);
1202     if (IS_ERR(data->hwmon_dev)) {
1203         err = PTR_ERR(data->hwmon_dev);
1204         dev_err(dev, "Class registration failed (%d)\n", err);
1205         goto EXIT_DEV_REMOVE_SILENT;
1206     }
1207 
1208     return 0;
1209 
1210 EXIT_DEV_REMOVE:
1211     dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1212 EXIT_DEV_REMOVE_SILENT:
1213     vt1211_remove_sysfs(pdev);
1214     return err;
1215 }
1216 
1217 static int vt1211_remove(struct platform_device *pdev)
1218 {
1219     struct vt1211_data *data = platform_get_drvdata(pdev);
1220 
1221     hwmon_device_unregister(data->hwmon_dev);
1222     vt1211_remove_sysfs(pdev);
1223 
1224     return 0;
1225 }
1226 
1227 static struct platform_driver vt1211_driver = {
1228     .driver = {
1229         .name  = DRVNAME,
1230     },
1231     .probe  = vt1211_probe,
1232     .remove = vt1211_remove,
1233 };
1234 
1235 static int __init vt1211_device_add(unsigned short address)
1236 {
1237     struct resource res = {
1238         .start  = address,
1239         .end    = address + 0x7f,
1240         .flags  = IORESOURCE_IO,
1241     };
1242     int err;
1243 
1244     pdev = platform_device_alloc(DRVNAME, address);
1245     if (!pdev) {
1246         err = -ENOMEM;
1247         pr_err("Device allocation failed (%d)\n", err);
1248         goto EXIT;
1249     }
1250 
1251     res.name = pdev->name;
1252     err = acpi_check_resource_conflict(&res);
1253     if (err)
1254         goto EXIT_DEV_PUT;
1255 
1256     err = platform_device_add_resources(pdev, &res, 1);
1257     if (err) {
1258         pr_err("Device resource addition failed (%d)\n", err);
1259         goto EXIT_DEV_PUT;
1260     }
1261 
1262     err = platform_device_add(pdev);
1263     if (err) {
1264         pr_err("Device addition failed (%d)\n", err);
1265         goto EXIT_DEV_PUT;
1266     }
1267 
1268     return 0;
1269 
1270 EXIT_DEV_PUT:
1271     platform_device_put(pdev);
1272 EXIT:
1273     return err;
1274 }
1275 
1276 static int __init vt1211_find(int sio_cip, unsigned short *address)
1277 {
1278     int err;
1279     int devid;
1280 
1281     err = superio_enter(sio_cip);
1282     if (err)
1283         return err;
1284 
1285     err = -ENODEV;
1286     devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1287     if (devid != SIO_VT1211_ID)
1288         goto EXIT;
1289 
1290     superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1291 
1292     if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1293         pr_warn("HW monitor is disabled, skipping\n");
1294         goto EXIT;
1295     }
1296 
1297     *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1298             (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1299     if (*address == 0) {
1300         pr_warn("Base address is not set, skipping\n");
1301         goto EXIT;
1302     }
1303 
1304     err = 0;
1305     pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1306         *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1307 
1308 EXIT:
1309     superio_exit(sio_cip);
1310     return err;
1311 }
1312 
1313 static int __init vt1211_init(void)
1314 {
1315     int err;
1316     unsigned short address = 0;
1317 
1318     err = vt1211_find(SIO_REG_CIP1, &address);
1319     if (err) {
1320         err = vt1211_find(SIO_REG_CIP2, &address);
1321         if (err)
1322             goto EXIT;
1323     }
1324 
1325     if ((uch_config < -1) || (uch_config > 31)) {
1326         err = -EINVAL;
1327         pr_warn("Invalid UCH configuration %d. Choose a value between 0 and 31.\n",
1328             uch_config);
1329         goto EXIT;
1330     }
1331 
1332     if ((int_mode < -1) || (int_mode > 0)) {
1333         err = -EINVAL;
1334         pr_warn("Invalid interrupt mode %d. Only mode 0 is supported.\n",
1335             int_mode);
1336         goto EXIT;
1337     }
1338 
1339     err = platform_driver_register(&vt1211_driver);
1340     if (err)
1341         goto EXIT;
1342 
1343     /* Sets global pdev as a side effect */
1344     err = vt1211_device_add(address);
1345     if (err)
1346         goto EXIT_DRV_UNREGISTER;
1347 
1348     return 0;
1349 
1350 EXIT_DRV_UNREGISTER:
1351     platform_driver_unregister(&vt1211_driver);
1352 EXIT:
1353     return err;
1354 }
1355 
1356 static void __exit vt1211_exit(void)
1357 {
1358     platform_device_unregister(pdev);
1359     platform_driver_unregister(&vt1211_driver);
1360 }
1361 
1362 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1363 MODULE_DESCRIPTION("VT1211 sensors");
1364 MODULE_LICENSE("GPL");
1365 
1366 module_init(vt1211_init);
1367 module_exit(vt1211_exit);
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