hwmon: (it87) Add support for IT8782F and IT8783E/F

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>

2 files changed, 118 insertions, 35 deletions

diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 23b7def21ba8..899128dfb130 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -30,6 +30,14 @@ Supported chips:
     Prefix: 'it8728'
     Addresses scanned: from Super I/O config space (8 I/O ports)
     Datasheet: Not publicly available
+  * IT8782F
+    Prefix: 'it8782'
+    Addresses scanned: from Super I/O config space (8 I/O ports)
+    Datasheet: Not publicly available
+  * IT8783E/F
+    Prefix: 'it8783'
+    Addresses scanned: from Super I/O config space (8 I/O ports)
+    Datasheet: Not publicly available
   * SiS950   [clone of IT8705F]
     Prefix: 'it87'
     Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -75,7 +83,8 @@ Description
 -----------
 
 This driver implements support for the IT8705F, IT8712F, IT8716F,
-IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E and SiS950 chips.
+IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E, IT8781F, IT8782F,
+IT8783E/F, and SiS950 chips.
 
 These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
 joysticks and other miscellaneous stuff. For hardware monitoring, they
@@ -99,11 +108,11 @@ The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E and later IT8712F revisions
 have support for 2 additional fans. The additional fans are supported by the
 driver.
 
-The IT8716F, IT8718F, IT8720F and IT8721F/IT8758E, and late IT8712F and
-IT8705F also have optional 16-bit tachometer counters for fans 1 to 3. This
-is better (no more fan clock divider mess) but not compatible with the older
-chips and revisions. The 16-bit tachometer mode is enabled by the driver when
-one of the above chips is detected.
+The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E, IT8782F, IT8783E/F, and late
+IT8712F and IT8705F also have optional 16-bit tachometer counters for fans 1 to
+3. This is better (no more fan clock divider mess) but not compatible with the
+older chips and revisions. The 16-bit tachometer mode is enabled by the driver
+when one of the above chips is detected.
 
 The IT8726F is just bit enhanced IT8716F with additional hardware
 for AMD power sequencing. Therefore the chip will appear as IT8716F
@@ -131,9 +140,10 @@ 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, some voltage inputs are internal and scaled inside
-the chip (in7, in8 and optionally in3). The driver handles this transparently
-so user-space doesn't have to care.
+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.
 
 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/it87.c b/drivers/hwmon/it87.c
index 0b204e4cf51c..aebac1334ff6 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -19,6 +19,8 @@
  *            IT8726F  Super I/O chip w/LPC interface
  *            IT8728F  Super I/O chip w/LPC interface
  *            IT8758E  Super I/O chip w/LPC interface
+ *            IT8782F  Super I/O chip w/LPC interface
+ *            IT8783E/F Super I/O chip w/LPC interface
  *            Sis950   A clone of the IT8705F
  *
  *  Copyright (C) 2001 Chris Gauthron
@@ -59,7 +61,8 @@
 
 #define DRVNAME "it87"
 
-enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728 };
+enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
+             it8783 };
 
 static unsigned short force_id;
 module_param(force_id, ushort, 0);
@@ -137,13 +140,18 @@ static inline void superio_exit(void)
 #define IT8721F_DEVID 0x8721
 #define IT8726F_DEVID 0x8726
 #define IT8728F_DEVID 0x8728
+#define IT8782F_DEVID 0x8782
+#define IT8783E_DEVID 0x8783
 #define IT87_ACT_REG  0x30
 #define IT87_BASE_REG 0x60
 
 /* Logical device 7 registers (IT8712F and later) */
+#define IT87_SIO_GPIO1_REG      0x25
 #define IT87_SIO_GPIO3_REG      0x27
 #define IT87_SIO_GPIO5_REG      0x29
+#define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
+#define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
 #define IT87_SIO_VID_REG        0xfc    /* VID value */
 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 
@@ -304,31 +312,23 @@ static inline int has_newer_autopwm(const struct it87_data *data)
             || data->type == it8728;
 }
 
-static u8 in_to_reg(const struct it87_data *data, int nr, long val)
+static int adc_lsb(const struct it87_data *data, int nr)
 {
-        long lsb;
-
-        if (has_12mv_adc(data)) {
-                if (data->in_scaled & (1 << nr))
-                        lsb = 24;
-                else
-                        lsb = 12;
-        } else
-                lsb = 16;
+        int lsb = has_12mv_adc(data) ? 12 : 16;
+        if (data->in_scaled & (1 << nr))
+                lsb <<= 1;
+        return lsb;
+}
 
-        val = DIV_ROUND_CLOSEST(val, lsb);
+static u8 in_to_reg(const struct it87_data *data, int nr, long val)
+{
+        val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
         return SENSORS_LIMIT(val, 0, 255);
 }
 
 static int in_from_reg(const struct it87_data *data, int nr, int val)
 {
-        if (has_12mv_adc(data)) {
-                if (data->in_scaled & (1 << nr))
-                        return val * 24;
-                else
-                        return val * 12;
-        } else
-                return val * 16;
+        return val * adc_lsb(data, nr);
 }
 
 static inline u8 FAN_TO_REG(long rpm, int div)
@@ -407,7 +407,9 @@ static inline int has_16bit_fans(const struct it87_data *data)
             || data->type == it8718
             || data->type == it8720
             || data->type == it8721
-            || data->type == it8728;
+            || data->type == it8728
+            || data->type == it8782
+            || data->type == it8783;
 }
 
 static inline int has_old_autopwm(const struct it87_data *data)
@@ -1651,6 +1653,12 @@ static int __init it87_find(unsigned short *address,
         case IT8728F_DEVID:
                 sio_data->type = it8728;
                 break;
+        case IT8782F_DEVID:
+                sio_data->type = it8782;
+                break;
+        case IT8783E_DEVID:
+                sio_data->type = it8783;
+                break;
         case 0xffff:    /* No device at all */
                 goto exit;
         default:
@@ -1686,16 +1694,68 @@ static int __init it87_find(unsigned short *address,
                 /* The IT8705F has a different LD number for GPIO */
                 superio_select(5);
                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
+        } else if (sio_data->type == it8783) {
+                int reg25, reg27, reg2A, reg2C, regEF;
+                bool uart6;
+
+                sio_data->skip_vid = 1; /* No VID */
+
+                superio_select(GPIO);
+
+                reg25 = superio_inb(IT87_SIO_GPIO1_REG);
+                reg27 = superio_inb(IT87_SIO_GPIO3_REG);
+                reg2A = superio_inb(IT87_SIO_PINX1_REG);
+                reg2C = superio_inb(IT87_SIO_PINX2_REG);
+                regEF = superio_inb(IT87_SIO_SPI_REG);
+
+                uart6 = reg2C & (1 << 2);
+
+                /* Check if fan3 is there or not */
+                if ((reg27 & (1 << 0)) || !uart6)
+                        sio_data->skip_fan |= (1 << 2);
+                if ((reg25 & (1 << 4))
+                    || (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
+                        sio_data->skip_pwm |= (1 << 2);
+
+                /* Check if fan2 is there or not */
+                if (reg27 & (1 << 7))
+                        sio_data->skip_fan |= (1 << 1);
+                if (reg27 & (1 << 3))
+                        sio_data->skip_pwm |= (1 << 1);
+
+                /* VIN5 */
+                if ((reg27 & (1 << 0)) || uart6)
+                        ; /* No VIN5 */
+
+                /* VIN6 */
+                if ((reg27 & (1 << 1)) || uart6)
+                        ; /* No VIN6 */
+
+                /*
+                 * VIN7
+                 * Does not depend on bit 2 of Reg2C, contrary to datasheet.
+                 */
+                if (reg27 & (1 << 2))
+                        ; /* No VIN7 (unless internal) */
+
+                if (reg2C & (1 << 0))
+                        sio_data->internal |= (1 << 0);
+                if (reg2C & (1 << 1))
+                        sio_data->internal |= (1 << 1);
+
+                sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
+
         } else {
                 int reg;
 
                 superio_select(GPIO);
 
                 reg = superio_inb(IT87_SIO_GPIO3_REG);
-                if (sio_data->type == it8721 || sio_data->type == it8728) {
+                if (sio_data->type == it8721 || sio_data->type == it8728 ||
+                    sio_data->type == it8782) {
                         /*
-                         * The IT8721F/IT8758E doesn't have VID pins at all,
-                         * not sure about the IT8728F.
+                         * IT8721F/IT8758E, and IT8782F don't have VID pins
+                         * at all, not sure about the IT8728F.
                          */
                         sio_data->skip_vid = 1;
                 } else {
@@ -1733,8 +1793,13 @@ static int __init it87_find(unsigned short *address,
                  * configured, even though the IT8720F datasheet claims
                  * that the internal routing of VCCH to VIN7 is the default
                  * setting. So we force the internal routing in this case.
+                 *
+                 * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
+                 * If UART6 is enabled, re-route VIN7 to the internal divider.
                  */
-                if (sio_data->type == it8720 && !(reg & (1 << 1))) {
+                if ((sio_data->type == it8720 ||
+                    (sio_data->type == it8782 && (reg & (1 << 2))))
+                    && !(reg & (1 << 1))) {
                         reg |= (1 << 1);
                         superio_outb(IT87_SIO_PINX2_REG, reg);
                         pr_notice("Routing internal VCCH to in7\n");
@@ -1823,6 +1888,8 @@ static int __devinit it87_probe(struct platform_device *pdev)
                 "it8720",
                 "it8721",
                 "it8728",
+                "it8782",
+                "it8783",
         };
 
         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
@@ -1867,6 +1934,11 @@ static int __devinit 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 */
+        } else if (sio_data->type == it8782 || sio_data->type == it8783) {
+                if (sio_data->internal & (1 << 0))
+                        data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
+                if (sio_data->internal & (1 << 1))
+                        data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
         }
 
         /* Initialize the IT87 chip */
@@ -2143,8 +2215,9 @@ static void __devinit it87_init_device(struct platform_device *pdev)
                         it87_write_value(data, IT87_REG_FAN_16BIT,
                                          tmp | 0x07);
                 }
-                /* IT8705F only supports three fans. */
-                if (data->type != it87) {
+                /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
+                if (data->type != it87 && data->type != it8782 &&
+                    data->type != it8783) {
                         if (tmp & (1 << 4))
                                 data->has_fan |= (1 << 3); /* fan4 enabled */
                         if (tmp & (1 << 5))