hwmon: (it87) Add support for the ITE IT8603E

Add support for IT8603E.

This closes bug #57861:
https://bugzilla.kernel.org/show_bug.cgi?id=57861

[JD: Fixes and clean-ups.]

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

3 files changed, 106 insertions, 28 deletions

diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index c263740f0cba..0f5bba9aa02d 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -2,6 +2,10 @@ Kernel driver it87
 ==================
 
 Supported chips:
+  * IT8603E
+    Prefix: 'it8603'
+    Addresses scanned: from Super I/O config space (8 I/O ports)
+    Datasheet: Not publicly available
   * IT8705F
     Prefix: 'it87'
     Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -90,7 +94,7 @@ motherboard models.
 Description
 -----------
 
-This driver implements support for the IT8705F, IT8712F, IT8716F,
+This driver implements support for the IT8603E, IT8705F, IT8712F, IT8716F,
 IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E, IT8771E, IT8772E,
 IT8782F, IT8783E/F, and SiS950 chips.
 
@@ -129,6 +133,10 @@ to userspace applications.
 The IT8728F, IT8771E, and IT8772E are considered compatible with the IT8721F,
 until a datasheet becomes available (hopefully.)
 
+The IT8603E is a custom design, hardware monitoring part is similar to
+IT8728F. It only supports 16-bit fan mode, the full speed mode of the
+fan is not supported (value 0 of pwmX_enable).
+
 Temperatures are measured in degrees Celsius. An alarm is triggered once
 when the Overtemperature Shutdown limit is crossed.
 
@@ -145,13 +153,16 @@ alarm is triggered if the voltage has crossed a programmable minimum or
 maximum limit. Note that minimum in this case always means 'closest to
 zero'; this is important for negative voltage measurements. All voltage
 inputs can measure voltages between 0 and 4.08 volts, with a resolution of
-0.016 volt (except IT8721F/IT8758E and IT8728F: 0.012 volt.) The battery
-voltage in8 does not have limit registers.
-
-On the IT8721F/IT8758E, IT8782F, and IT8783E/F, some voltage inputs are
-internal and scaled inside the chip (in7 (optional for IT8782F and IT8783E/F),
-in8 and optionally in3). The driver handles this transparently so user-space
-doesn't have to care.
+0.016 volt (except IT8603E, IT8721F/IT8758E and IT8728F: 0.012 volt.) The
+battery voltage in8 does not have limit registers.
+
+On the IT8603E, IT8721F/IT8758E, IT8782F, and IT8783E/F, some voltage inputs
+are internal and scaled inside the chip:
+* in3 (optional)
+* in7 (optional for IT8782F and IT8783E/F)
+* in8 (always)
+* in9 (relevant for IT8603E only)
+The driver handles this transparently so user-space doesn't have to care.
 
 The VID lines (IT8712F/IT8716F/IT8718F/IT8720F) encode the core voltage value:
 the voltage level your processor should work with. This is hardcoded by
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 52d548f1dc1d..f6ca3b21aebd 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -573,8 +573,8 @@ config SENSORS_IT87
         help
           If you say yes here you get support for ITE IT8705F, IT8712F,
           IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E,
-          IT8771E, IT8772E, IT8782F, and IT8783E/F sensor chips, and the
-          SiS950 clone.
+          IT8771E, IT8772E, IT8782F, IT8783E/F and IT8603E sensor chips,
+          and the SiS950 clone.
 
           This driver can also be built as a module.  If so, the module
           will be called it87.
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 29ffa27c60b8..b78f71110983 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -10,7 +10,8 @@
  *  This driver supports only the Environment Controller in the IT8705F and
  *  similar parts.  The other devices are supported by different drivers.
  *
- *  Supports: IT8705F  Super I/O chip w/LPC interface
+ *  Supports: IT8603E  Super I/O chip w/LPC interface
+ *            IT8705F  Super I/O chip w/LPC interface
  *            IT8712F  Super I/O chip w/LPC interface
  *            IT8716F  Super I/O chip w/LPC interface
  *            IT8718F  Super I/O chip w/LPC interface
@@ -64,7 +65,7 @@
 #define DRVNAME "it87"
 
 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
-             it8772, it8782, it8783 };
+             it8772, it8782, it8783, it8603 };
 
 static unsigned short force_id;
 module_param(force_id, ushort, 0);
@@ -146,6 +147,7 @@ static inline void superio_exit(void)
 #define IT8772E_DEVID 0x8772
 #define IT8782F_DEVID 0x8782
 #define IT8783E_DEVID 0x8783
+#define IT8306E_DEVID 0x8603
 #define IT87_ACT_REG  0x30
 #define IT87_BASE_REG 0x60
 
@@ -315,6 +317,12 @@ static const struct it87_devices it87_devices[] = {
                   | FEAT_TEMP_OLD_PECI,
                 .old_peci_mask = 0x4,
         },
+        [it8603] = {
+                .name = "it8603",
+                .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
+                  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
+                .peci_mask = 0x07,
+        },
 };
 
 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
@@ -361,7 +369,7 @@ struct it87_data {
         unsigned long last_updated;     /* In jiffies */
 
         u16 in_scaled;          /* Internal voltage sensors are scaled */
-        u8 in[9][3];            /* [nr][0]=in, [1]=min, [2]=max */
+        u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
         u8 has_fan;             /* Bitfield, fans enabled */
         u16 fan[5][2];          /* Register values, [nr][0]=fan, [1]=min */
         u8 has_temp;            /* Bitfield, temp sensors enabled */
@@ -578,6 +586,7 @@ static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
                             7, 2);
 
 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
+static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
 
 /* 3 temperatures */
 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
@@ -734,7 +743,7 @@ static int pwm_mode(const struct it87_data *data, int nr)
 {
         int ctrl = data->fan_main_ctrl & (1 << nr);
 
-        if (ctrl == 0)                                  /* Full speed */
+        if (ctrl == 0 && data->type != it8603)          /* Full speed */
                 return 0;
         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
                 return 2;
@@ -929,6 +938,10 @@ static ssize_t set_pwm_enable(struct device *dev,
                         return -EINVAL;
         }
 
+        /* IT8603E does not have on/off mode */
+        if (val == 0 && data->type == it8603)
+                return -EINVAL;
+
         mutex_lock(&data->update_lock);
 
         if (val == 0) {
@@ -948,10 +961,13 @@ static ssize_t set_pwm_enable(struct device *dev,
                 else                                    /* Automatic mode */
                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
-                /* set SmartGuardian mode */
-                data->fan_main_ctrl |= (1 << nr);
-                it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
-                                 data->fan_main_ctrl);
+
+                if (data->type != it8603) {
+                        /* set SmartGuardian mode */
+                        data->fan_main_ctrl |= (1 << nr);
+                        it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
+                                         data->fan_main_ctrl);
+                }
         }
 
         mutex_unlock(&data->update_lock);
@@ -1415,6 +1431,8 @@ static ssize_t show_label(struct device *dev, struct device_attribute *attr,
 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
+/* special AVCC3 IT8306E in9 */
+static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
 
 static ssize_t show_name(struct device *dev, struct device_attribute
                          *devattr, char *buf)
@@ -1424,7 +1442,7 @@ static ssize_t show_name(struct device *dev, struct device_attribute
 }
 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 
-static struct attribute *it87_attributes_in[9][5] = {
+static struct attribute *it87_attributes_in[10][5] = {
 {
         &sensor_dev_attr_in0_input.dev_attr.attr,
         &sensor_dev_attr_in0_min.dev_attr.attr,
@@ -1476,9 +1494,12 @@ static struct attribute *it87_attributes_in[9][5] = {
 }, {
         &sensor_dev_attr_in8_input.dev_attr.attr,
         NULL
+}, {
+        &sensor_dev_attr_in9_input.dev_attr.attr,
+        NULL
 } };
 
-static const struct attribute_group it87_group_in[9] = {
+static const struct attribute_group it87_group_in[10] = {
         { .attrs = it87_attributes_in[0] },
         { .attrs = it87_attributes_in[1] },
         { .attrs = it87_attributes_in[2] },
@@ -1488,6 +1509,7 @@ static const struct attribute_group it87_group_in[9] = {
         { .attrs = it87_attributes_in[6] },
         { .attrs = it87_attributes_in[7] },
         { .attrs = it87_attributes_in[8] },
+        { .attrs = it87_attributes_in[9] },
 };
 
 static struct attribute *it87_attributes_temp[3][6] = {
@@ -1546,7 +1568,8 @@ static struct attribute *it87_attributes_in_beep[] = {
         &sensor_dev_attr_in5_beep.dev_attr.attr,
         &sensor_dev_attr_in6_beep.dev_attr.attr,
         &sensor_dev_attr_in7_beep.dev_attr.attr,
-        NULL
+        NULL,
+        NULL,
 };
 
 static struct attribute *it87_attributes_temp_beep[] = {
@@ -1685,6 +1708,7 @@ static struct attribute *it87_attributes_label[] = {
         &sensor_dev_attr_in3_label.dev_attr.attr,
         &sensor_dev_attr_in7_label.dev_attr.attr,
         &sensor_dev_attr_in8_label.dev_attr.attr,
+        &sensor_dev_attr_in9_label.dev_attr.attr,
         NULL
 };
 
@@ -1742,6 +1766,9 @@ static int __init it87_find(unsigned short *address,
         case IT8783E_DEVID:
                 sio_data->type = it8783;
                 break;
+        case IT8306E_DEVID:
+                sio_data->type = it8603;
+                break;
         case 0xffff:    /* No device at all */
                 goto exit;
         default:
@@ -1763,11 +1790,15 @@ static int __init it87_find(unsigned short *address,
 
         err = 0;
         sio_data->revision = superio_inb(DEVREV) & 0x0f;
-        pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
-                chip_type, *address, sio_data->revision);
+        pr_info("Found IT%04x%c chip at 0x%x, revision %d\n", chip_type,
+                chip_type == 0x8603 ? 'E' : 'F', *address,
+                sio_data->revision);
 
         /* in8 (Vbat) is always internal */
         sio_data->internal = (1 << 2);
+        /* Only the IT8603E has in9 */
+        if (sio_data->type != it8603)
+                sio_data->skip_in |= (1 << 9);
 
         /* Read GPIO config and VID value from LDN 7 (GPIO) */
         if (sio_data->type == it87) {
@@ -1844,7 +1875,38 @@ static int __init it87_find(unsigned short *address,
                         sio_data->internal |= (1 << 1);
 
                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
+        } else if (sio_data->type == it8603) {
+                int reg27, reg29;
+
+                sio_data->skip_vid = 1; /* No VID */
+                superio_select(GPIO);
 
+                reg27 = superio_inb(IT87_SIO_GPIO3_REG);
+
+                /* Check if fan3 is there or not */
+                if (reg27 & (1 << 6))
+                        sio_data->skip_pwm |= (1 << 2);
+                if (reg27 & (1 << 7))
+                        sio_data->skip_fan |= (1 << 2);
+
+                /* Check if fan2 is there or not */
+                reg29 = superio_inb(IT87_SIO_GPIO5_REG);
+                if (reg29 & (1 << 1))
+                        sio_data->skip_pwm |= (1 << 1);
+                if (reg29 & (1 << 2))
+                        sio_data->skip_fan |= (1 << 1);
+
+                sio_data->skip_in |= (1 << 5); /* No VIN5 */
+                sio_data->skip_in |= (1 << 6); /* No VIN6 */
+
+                /* no fan4 */
+                sio_data->skip_pwm |= (1 << 3);
+                sio_data->skip_fan |= (1 << 3);
+
+                sio_data->internal |= (1 << 1); /* in7 is VSB */
+                sio_data->internal |= (1 << 3); /* in9 is AVCC */
+
+                sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
         } else {
                 int reg;
                 bool uart6;
@@ -1966,7 +2028,7 @@ static void it87_remove_files(struct device *dev)
         int i;
 
         sysfs_remove_group(&dev->kobj, &it87_group);
-        for (i = 0; i < 9; i++) {
+        for (i = 0; i < 10; i++) {
                 if (sio_data->skip_in & (1 << i))
                         continue;
                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
@@ -2080,6 +2142,8 @@ static int it87_probe(struct platform_device *pdev)
                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
                 if (sio_data->internal & (1 << 2))
                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
+                if (sio_data->internal & (1 << 3))
+                        data->in_scaled |= (1 << 9);    /* in9 is AVCC */
         } else if (sio_data->type == it8782 || sio_data->type == it8783) {
                 if (sio_data->internal & (1 << 0))
                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
@@ -2102,7 +2166,7 @@ static int it87_probe(struct platform_device *pdev)
         if (err)
                 return err;
 
-        for (i = 0; i < 9; i++) {
+        for (i = 0; i < 10; i++) {
                 if (sio_data->skip_in & (1 << i))
                         continue;
                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
@@ -2202,7 +2266,7 @@ static int it87_probe(struct platform_device *pdev)
         }
 
         /* Export labels for internal sensors */
-        for (i = 0; i < 3; i++) {
+        for (i = 0; i < 4; i++) {
                 if (!(sio_data->internal & (1 << i)))
                         continue;
                 err = sysfs_create_file(&dev->kobj,
@@ -2383,8 +2447,9 @@ static void it87_init_device(struct platform_device *pdev)
         }
         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
 
-        /* Set tachometers to 16-bit mode if needed */
-        if (has_16bit_fans(data)) {
+        /* Set tachometers to 16-bit mode if needed, IT8603E (and IT8728F?)
+         * has it by default */
+        if (has_16bit_fans(data) && data->type != it8603) {
                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
                 if (~tmp & 0x07 & data->has_fan) {
                         dev_dbg(&pdev->dev,
@@ -2464,6 +2529,8 @@ static struct it87_data *it87_update_device(struct device *dev)
                 }
                 /* in8 (battery) has no limit registers */
                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
+                if (data->type == it8603)
+                        data->in[9][0] = it87_read_value(data, 0x2f);
 
                 for (i = 0; i < 5; i++) {
                         /* Skip disabled fans */