hwmon: (f71882fg) Add support for the f71889fg (version 2)

This adds support for the Fintek f71889fg to the f71882fg driver,
many thanks to Gerd v. Egidy for providing (remote) access to a
machine which such an ic.

Note that this bit of the patch:
-	val = SENSORS_LIMIT(val, 0, 255);
+
+	if (data->type == f71889fg)
+		val = SENSORS_LIMIT(val, -128, 127);
+	else
+		val = SENSORS_LIMIT(val, 0, 127);

Changes behaviour for already supported models, the new behaviour is correct
as the already supported models have bit 7 of the involved registers fixed at
0, so the previous behaviour which allowed setting temp zone limits > 127
was not correct.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

2 files changed, 71 insertions, 21 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index dd6939370f75..edf8febb5bc4 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -305,12 +305,12 @@ config SENSORS_F71805F
           will be called f71805f.
 
 config SENSORS_F71882FG
-        tristate "Fintek F71858FG, F71862FG, F71882FG and F8000"
+        tristate "Fintek F71858FG, F71862FG, F71882FG, F71889FG and F8000"
         depends on EXPERIMENTAL
         help
           If you say yes here you get support for hardware monitoring
-          features of the Fintek F71858FG, F71862FG/71863FG, F71882FG/F71883FG
-          and F8000 Super-I/O chips.
+          features of the Fintek F71858FG, F71862FG/71863FG, F71882FG/F71883FG,
+          F71889FG and F8000 Super-I/O chips.
 
           This driver can also be built as a module.  If so, the module
           will be called f71882fg.
diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
index 3a695f06905e..a95fa4256caa 100644
--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -48,6 +48,7 @@
 #define SIO_F71858_ID           0x0507  /* Chipset ID */
 #define SIO_F71862_ID           0x0601  /* Chipset ID */
 #define SIO_F71882_ID           0x0541  /* Chipset ID */
+#define SIO_F71889_ID           0x0723  /* Chipset ID */
 #define SIO_F8000_ID            0x0581  /* Chipset ID */
 
 #define REGION_LENGTH           8
@@ -95,12 +96,13 @@ static unsigned short force_id;
 module_param(force_id, ushort, 0);
 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 
-enum chips { f71858fg, f71862fg, f71882fg, f8000 };
+enum chips { f71858fg, f71862fg, f71882fg, f71889fg, f8000 };
 
 static const char *f71882fg_names[] = {
         "f71858fg",
         "f71862fg",
         "f71882fg",
+        "f71889fg",
         "f8000",
 };
 
@@ -155,7 +157,7 @@ struct f71882fg_data {
         u8      pwm_auto_point_hyst[2];
         u8      pwm_auto_point_mapping[4];
         u8      pwm_auto_point_pwm[4][5];
-        u8      pwm_auto_point_temp[4][4];
+        s8      pwm_auto_point_temp[4][4];
 };
 
 /* Sysfs in */
@@ -945,7 +947,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
         /* Update once every 60 seconds */
         if ( time_after(jiffies, data->last_limits + 60 * HZ ) ||
                         !data->valid) {
-                if (data->type == f71882fg) {
+                if (data->type == f71882fg || data->type == f71889fg) {
                         data->in1_max =
                                 f71882fg_read8(data, F71882FG_REG_IN1_HIGH);
                         data->in_beep =
@@ -967,7 +969,8 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
                                                 F71882FG_REG_TEMP_HYST(1));
                 }
 
-                if (data->type == f71862fg || data->type == f71882fg) {
+                if (data->type == f71862fg || data->type == f71882fg ||
+                    data->type == f71889fg) {
                         data->fan_beep = f71882fg_read8(data,
                                                 F71882FG_REG_FAN_BEEP);
                         data->temp_beep = f71882fg_read8(data,
@@ -977,15 +980,33 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
                         data->temp_type[2] = (reg & 0x04) ? 2 : 4;
                         data->temp_type[3] = (reg & 0x08) ? 2 : 4;
                 }
-                reg2 = f71882fg_read8(data, F71882FG_REG_PECI);
-                if ((reg2 & 0x03) == 0x01)
-                        data->temp_type[1] = 6 /* PECI */;
-                else if ((reg2 & 0x03) == 0x02)
-                        data->temp_type[1] = 5 /* AMDSI */;
-                else if (data->type == f71862fg || data->type == f71882fg)
-                        data->temp_type[1] = (reg & 0x02) ? 2 : 4;
-                else
-                        data->temp_type[1] = 2; /* Only supports BJT */
+                /* Determine temp index 1 sensor type */
+                if (data->type == f71889fg) {
+                        reg2 = f71882fg_read8(data, F71882FG_REG_START);
+                        switch ((reg2 & 0x60) >> 5) {
+                        case 0x00: /* BJT / Thermistor */
+                                data->temp_type[1] = (reg & 0x02) ? 2 : 4;
+                                break;
+                        case 0x01: /* AMDSI */
+                                data->temp_type[1] = 5;
+                                break;
+                        case 0x02: /* PECI */
+                        case 0x03: /* Ibex Peak ?? Report as PECI for now */
+                                data->temp_type[1] = 6;
+                                break;
+                        }
+                } else {
+                        reg2 = f71882fg_read8(data, F71882FG_REG_PECI);
+                        if ((reg2 & 0x03) == 0x01)
+                                data->temp_type[1] = 6; /* PECI */
+                        else if ((reg2 & 0x03) == 0x02)
+                                data->temp_type[1] = 5; /* AMDSI */
+                        else if (data->type == f71862fg ||
+                                 data->type == f71882fg)
+                                data->temp_type[1] = (reg & 0x02) ? 2 : 4;
+                        else /* f71858fg and f8000 only support BJT */
+                                data->temp_type[1] = 2;
+                }
 
                 data->pwm_enable = f71882fg_read8(data,
                                                   F71882FG_REG_PWM_ENABLE);
@@ -1062,7 +1083,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
                 if (data->type == f8000)
                         data->fan[3] = f71882fg_read16(data,
                                                 F71882FG_REG_FAN(3));
-                if (data->type == f71882fg)
+                if (data->type == f71882fg || data->type == f71889fg)
                         data->in_status = f71882fg_read8(data,
                                                 F71882FG_REG_IN_STATUS);
                 for (nr = 0; nr < nr_ins; nr++)
@@ -1780,7 +1801,11 @@ static ssize_t store_pwm_auto_point_temp(struct device *dev,
         int pwm = to_sensor_dev_attr_2(devattr)->index;
         int point = to_sensor_dev_attr_2(devattr)->nr;
         long val = simple_strtol(buf, NULL, 10) / 1000;
-        val = SENSORS_LIMIT(val, 0, 255);
+
+        if (data->type == f71889fg)
+                val = SENSORS_LIMIT(val, -128, 127);
+        else
+                val = SENSORS_LIMIT(val, 0, 127);
 
         mutex_lock(&data->update_lock);
         f71882fg_write8(data, F71882FG_REG_POINT_TEMP(pwm, point), val);
@@ -1871,6 +1896,7 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
                                         ARRAY_SIZE(f71858fg_in_temp_attr));
                         break;
                 case f71882fg:
+                case f71889fg:
                         err = f71882fg_create_sysfs_files(pdev,
                                         fxxxx_in1_alarm_attr,
                                         ARRAY_SIZE(fxxxx_in1_alarm_attr));
@@ -1908,6 +1934,7 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
                         err = (data->pwm_enable & 0x15) != 0x15;
                         break;
                 case f71882fg:
+                case f71889fg:
                         err = 0;
                         break;
                 case f8000:
@@ -1927,7 +1954,8 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
                 if (err)
                         goto exit_unregister_sysfs;
 
-                if (data->type == f71862fg || data->type == f71882fg) {
+                if (data->type == f71862fg || data->type == f71882fg ||
+                    data->type == f71889fg) {
                         err = f71882fg_create_sysfs_files(pdev,
                                         fxxxx_fan_beep_attr, nr_fans);
                         if (err)
@@ -1950,6 +1978,22 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
                                         f8000_auto_pwm_attr,
                                         ARRAY_SIZE(f8000_auto_pwm_attr));
                         break;
+                case f71889fg:
+                        for (i = 0; i < nr_fans; i++) {
+                                data->pwm_auto_point_mapping[i] =
+                                        f71882fg_read8(data,
+                                                F71882FG_REG_POINT_MAPPING(i));
+                                if (data->pwm_auto_point_mapping[i] & 0x80)
+                                        break;
+                        }
+                        if (i != nr_fans) {
+                                dev_warn(&pdev->dev,
+                                         "Auto pwm controlled by raw digital "
+                                         "data, disabling pwm auto_point "
+                                         "sysfs attributes\n");
+                                break;
+                        }
+                        /* fall through */
                 default: /* f71858fg / f71882fg */
                         err = f71882fg_create_sysfs_files(pdev,
                                 &fxxxx_auto_pwm_attr[0][0],
@@ -2006,6 +2050,7 @@ static int f71882fg_remove(struct platform_device *pdev)
                                         ARRAY_SIZE(f71858fg_in_temp_attr));
                         break;
                 case f71882fg:
+                case f71889fg:
                         f71882fg_remove_sysfs_files(pdev,
                                         fxxxx_in1_alarm_attr,
                                         ARRAY_SIZE(fxxxx_in1_alarm_attr));
@@ -2027,7 +2072,8 @@ static int f71882fg_remove(struct platform_device *pdev)
                 f71882fg_remove_sysfs_files(pdev, &fxxxx_fan_attr[0][0],
                                 ARRAY_SIZE(fxxxx_fan_attr[0]) * nr_fans);
 
-                if (data->type == f71862fg || data->type == f71882fg)
+                if (data->type == f71862fg || data->type == f71882fg ||
+                    data->type == f71889fg)
                         f71882fg_remove_sysfs_files(pdev,
                                         fxxxx_fan_beep_attr, nr_fans);
 
@@ -2082,11 +2128,15 @@ static int __init f71882fg_find(int sioaddr, unsigned short *address,
         case SIO_F71882_ID:
                 sio_data->type = f71882fg;
                 break;
+        case SIO_F71889_ID:
+                sio_data->type = f71889fg;
+                break;
         case SIO_F8000_ID:
                 sio_data->type = f8000;
                 break;
         default:
-                printk(KERN_INFO DRVNAME ": Unsupported Fintek device\n");
+                printk(KERN_INFO DRVNAME ": Unsupported Fintek device: %04x\n",
+                       (unsigned int)devid);
                 goto exit;
         }