hwmon: (w83627ehf) Add support for the W83627UHG

This is essentially a stripped down version of the W83627DHG. Noticeable
difference is that it is still powered with +5V, as older models, even
though the ADC resolution is 8 mV as newer models have.

Thanks to Ulf Bruman (Saab Group) for doing all the testing.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>

diff --git a/Documentation/hwmon/w83627ehf b/Documentation/hwmon/w83627ehf
index 76ffef9..3f44dbd 100644 (file)
--- a/Documentation/hwmon/w83627ehf
+++ b/Documentation/hwmon/w83627ehf
@@ -14,6 +14,10 @@ Supported chips:
     Prefix: 'w83627dhg'
     Addresses scanned: ISA address retrieved from Super I/O registers
     Datasheet: not available
+  * Winbond W83627UHG
+    Prefix: 'w83627uhg'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: available from www.nuvoton.com
   * Winbond W83667HG
     Prefix: 'w83667hg'
     Addresses scanned: ISA address retrieved from Super I/O registers
@@ -42,14 +46,13 @@ Description
 -----------
 
 This driver implements support for the Winbond W83627EHF, W83627EHG,
-W83627DHG, W83627DHG-P, W83667HG, W83667HG-B, W83667HG-I (NCT6775F),
-and NCT6776F super I/O chips. We will refer to them collectively as
-Winbond chips.
-
-The chips implement three temperature sensors (up to four for 667HG-B, and nine
-for NCT6775F and NCT6776F), five fan rotation speed sensors, ten analog voltage
-sensors (only nine for the 627DHG), one VID (6 pins for the 627EHF/EHG, 8 pins
-for the 627DHG and 667HG), alarms with beep warnings (control unimplemented),
+W83627DHG, W83627DHG-P, W83627UHG, W83667HG, W83667HG-B, W83667HG-I
+(NCT6775F), and NCT6776F super I/O chips. We will refer to them collectively
+as Winbond chips.
+
+The chips implement 2 to 4 temperature sensors (9 for NCT6775F and NCT6776F),
+2 to 5 fan rotation speed sensors, 8 to 10 analog voltage sensors, one VID
+(except for 627UHG), alarms with beep warnings (control unimplemented),
 and some automatic fan regulation strategies (plus manual fan control mode).
 
 The temperature sensor sources on W82677HG-B, NCT6775F, and NCT6776F are
@@ -86,17 +89,16 @@ follows:
 
 temp1 -> pwm1
 temp2 -> pwm2
-temp3 -> pwm3
+temp3 -> pwm3 (not on 627UHG)
 prog  -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not
               supported by the driver)
 
 /sys files
 ----------
 
-name - this is a standard hwmon device entry. For the W83627EHF and W83627EHG,
-       it is set to "w83627ehf", for the W83627DHG it is set to "w83627dhg",
-       for the W83667HG and W83667HG-B it is set to "w83667hg", for NCT6775F it
-       is set to "nct6775", and for NCT6776F it is set to "nct6776".
+name - this is a standard hwmon device entry, it contains the name of
+       the device (see the prefix in the list of supported devices at
+       the top of this file)
 
 pwm[1-4] - this file stores PWM duty cycle or DC value (fan speed) in range:
           0 (stop) to 255 (full)

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 279a509..9ec854a 100644 (file)
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1282,7 +1282,7 @@ config SENSORS_W83627HF
          will be called w83627hf.
 
 config SENSORS_W83627EHF
-       tristate "Winbond W83627EHF/EHG/DHG, W83667HG, NCT6775F, NCT6776F"
+       tristate "Winbond W83627EHF/EHG/DHG/UHG, W83667HG, NCT6775F, NCT6776F"
        depends on !PPC
        select HWMON_VID
        help
@@ -1292,7 +1292,8 @@ config SENSORS_W83627EHF
          This driver also supports the W83627EHG, which is the lead-free
          version of the W83627EHF, and the W83627DHG, which is a similar
          chip suited for specific Intel processors that use PECI such as
-         the Core 2 Duo.
+         the Core 2 Duo. And also the W83627UHG, which is a stripped down
+         version of the W83627DHG (as far as hardware monitoring goes.)
 
          This driver also supports Nuvoton W83667HG, W83667HG-B, NCT6775F
          (also known as W83667HG-I), and NCT6776F.

diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 81534cb..483cb26 100644 (file)
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -1,7 +1,7 @@
 /*
     w83627ehf - Driver for the hardware monitoring functionality of
                the Winbond W83627EHF Super-I/O chip
-    Copyright (C) 2005  Jean Delvare <khali@linux-fr.org>
+    Copyright (C) 2005-2011  Jean Delvare <khali@linux-fr.org>
     Copyright (C) 2006  Yuan Mu (Winbond),
                        Rudolf Marek <r.marek@assembler.cz>
                        David Hubbard <david.c.hubbard@gmail.com>
@@ -39,6 +39,7 @@
                                               0x8860 0xa1
     w83627dhg    9      5       4       3      0xa020 0xc1    0x5ca3
     w83627dhg-p  9      5       4       3      0xb070 0xc1    0x5ca3
+    w83627uhg    8      2       2       2      0xa230 0xc1    0x5ca3
     w83667hg     9      5       3       3      0xa510 0xc1    0x5ca3
     w83667hg-b   9      5       3       4      0xb350 0xc1    0x5ca3
     nct6775f     9      4       3       9      0xb470 0xc1    0x5ca3
@@ -61,14 +62,17 @@
 #include <linux/io.h>
 #include "lm75.h"
 
-enum kinds { w83627ehf, w83627dhg, w83627dhg_p, w83667hg, w83667hg_b, nct6775,
-       nct6776 };
+enum kinds {
+       w83627ehf, w83627dhg, w83627dhg_p, w83627uhg,
+       w83667hg, w83667hg_b, nct6775, nct6776,
+};
 
 /* used to set data->name = w83627ehf_device_names[data->sio_kind] */
 static const char * const w83627ehf_device_names[] = {
        "w83627ehf",
        "w83627dhg",
        "w83627dhg",
+       "w83627uhg",
        "w83667hg",
        "w83667hg",
        "nct6775",
@@ -104,6 +108,7 @@ MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal");
 #define SIO_W83627EHG_ID       0x8860
 #define SIO_W83627DHG_ID       0xa020
 #define SIO_W83627DHG_P_ID     0xb070
+#define SIO_W83627UHG_ID       0xa230
 #define SIO_W83667HG_ID                0xa510
 #define SIO_W83667HG_B_ID      0xb350
 #define SIO_NCT6775_ID         0xb470
@@ -388,18 +393,23 @@ div_from_reg(u8 reg)
        return 1 << reg;
 }
 
-/* Some of analog inputs have internal scaling (2x), 8mV is ADC LSB */
-
-static u8 scale_in[10] = { 8, 8, 16, 16, 8, 8, 8, 16, 16, 8 };
+/* Some of the voltage inputs have internal scaling, the tables below
+ * contain 8 (the ADC LSB in mV) * scaling factor * 100 */
+static const u16 scale_in_common[10] = {
+       800, 800, 1600, 1600, 800, 800, 800, 1600, 1600, 800
+};
+static const u16 scale_in_w83627uhg[9] = {
+       800, 800, 3328, 3424, 800, 800, 0, 3328, 3400
+};
 
-static inline long in_from_reg(u8 reg, u8 nr)
+static inline long in_from_reg(u8 reg, u8 nr, const u16 *scale_in)
 {
-       return reg * scale_in[nr];
+       return DIV_ROUND_CLOSEST(reg * scale_in[nr], 100);
 }
 
-static inline u8 in_to_reg(u32 val, u8 nr)
+static inline u8 in_to_reg(u32 val, u8 nr, const u16 *scale_in)
 {
-       return SENSORS_LIMIT(((val + (scale_in[nr] / 2)) / scale_in[nr]), 0,
+       return SENSORS_LIMIT(DIV_ROUND_CLOSEST(val * 100, scale_in[nr]), 0,
                             255);
 }
 
@@ -430,6 +440,7 @@ struct w83627ehf_data {
        const u16 *REG_FAN_STOP_TIME;
        const u16 *REG_FAN_MAX_OUTPUT;
        const u16 *REG_FAN_STEP_OUTPUT;
+       const u16 *scale_in;
 
        unsigned int (*fan_from_reg)(u16 reg, unsigned int divreg);
        unsigned int (*fan_from_reg_min)(u16 reg, unsigned int divreg);
@@ -481,7 +492,8 @@ struct w83627ehf_data {
        u8 vrm;
 
        u16 have_temp;
-       u8 in6_skip;
+       u8 in6_skip:1;
+       u8 temp3_val_only:1;
 };
 
 struct w83627ehf_sio_data {
@@ -907,7 +919,8 @@ show_##reg(struct device *dev, struct device_attribute *attr, \
        struct sensor_device_attribute *sensor_attr = \
                to_sensor_dev_attr(attr); \
        int nr = sensor_attr->index; \
-       return sprintf(buf, "%ld\n", in_from_reg(data->reg[nr], nr)); \
+       return sprintf(buf, "%ld\n", in_from_reg(data->reg[nr], nr, \
+                      data->scale_in)); \
 }
 show_in_reg(in)
 show_in_reg(in_min)
@@ -928,7 +941,7 @@ store_in_##reg(struct device *dev, struct device_attribute *attr, \
        if (err < 0) \
                return err; \
        mutex_lock(&data->update_lock); \
-       data->in_##reg[nr] = in_to_reg(val, nr); \
+       data->in_##reg[nr] = in_to_reg(val, nr, data->scale_in); \
        w83627ehf_write_value(data, W83627EHF_REG_IN_##REG(nr), \
                              data->in_##reg[nr]); \
        mutex_unlock(&data->update_lock); \
@@ -1617,25 +1630,28 @@ static struct sensor_device_attribute sda_sf3_arrays_fan4[] = {
                    store_fan_step_output, 3),
 };
 
+static struct sensor_device_attribute sda_sf3_arrays_fan3[] = {
+       SENSOR_ATTR(pwm3_stop_time, S_IWUSR | S_IRUGO, show_fan_stop_time,
+                   store_fan_stop_time, 2),
+       SENSOR_ATTR(pwm3_start_output, S_IWUSR | S_IRUGO, show_fan_start_output,
+                   store_fan_start_output, 2),
+       SENSOR_ATTR(pwm3_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
+                   store_fan_stop_output, 2),
+};
+
 static struct sensor_device_attribute sda_sf3_arrays[] = {
        SENSOR_ATTR(pwm1_stop_time, S_IWUSR | S_IRUGO, show_fan_stop_time,
                    store_fan_stop_time, 0),
        SENSOR_ATTR(pwm2_stop_time, S_IWUSR | S_IRUGO, show_fan_stop_time,
                    store_fan_stop_time, 1),
-       SENSOR_ATTR(pwm3_stop_time, S_IWUSR | S_IRUGO, show_fan_stop_time,
-                   store_fan_stop_time, 2),
        SENSOR_ATTR(pwm1_start_output, S_IWUSR | S_IRUGO, show_fan_start_output,
                    store_fan_start_output, 0),
        SENSOR_ATTR(pwm2_start_output, S_IWUSR | S_IRUGO, show_fan_start_output,
                    store_fan_start_output, 1),
-       SENSOR_ATTR(pwm3_start_output, S_IWUSR | S_IRUGO, show_fan_start_output,
-                   store_fan_start_output, 2),
        SENSOR_ATTR(pwm1_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
                    store_fan_stop_output, 0),
        SENSOR_ATTR(pwm2_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
                    store_fan_stop_output, 1),
-       SENSOR_ATTR(pwm3_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
-                   store_fan_stop_output, 2),
 };
 
 
@@ -1728,6 +1744,8 @@ static void w83627ehf_device_remove_files(struct device *dev)
                    data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff)
                        device_remove_file(dev, &attr->dev_attr);
        }
+       for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan3); i++)
+               device_remove_file(dev, &sda_sf3_arrays_fan3[i].dev_attr);
        for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
                device_remove_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
        for (i = 0; i < data->in_num; i++) {
@@ -1756,6 +1774,8 @@ static void w83627ehf_device_remove_files(struct device *dev)
                        continue;
                device_remove_file(dev, &sda_temp_input[i].dev_attr);
                device_remove_file(dev, &sda_temp_label[i].dev_attr);
+               if (i == 2 && data->temp3_val_only)
+                       continue;
                device_remove_file(dev, &sda_temp_max[i].dev_attr);
                device_remove_file(dev, &sda_temp_max_hyst[i].dev_attr);
                if (i > 2)
@@ -1808,6 +1828,9 @@ static inline void __devinit w83627ehf_init_device(struct w83627ehf_data *data,
        case w83627ehf:
                diode = w83627ehf_read_value(data, W83627EHF_REG_DIODE);
                break;
+       case w83627uhg:
+               diode = 0x00;
+               break;
        default:
                diode = 0x70;
        }
@@ -1871,6 +1894,13 @@ w83627ehf_check_fan_inputs(const struct w83627ehf_sio_data *sio_data,
 {
        int fan3pin, fan4pin, fan4min, fan5pin, regval;
 
+       /* The W83627UHG is simple, only two fan inputs, no config */
+       if (sio_data->kind == w83627uhg) {
+               data->has_fan = 0x03; /* fan1 and fan2 */
+               data->has_fan_min = 0x03;
+               return;
+       }
+
        superio_enter(sio_data->sioreg);
 
        /* fan4 and fan5 share some pins with the GPIO and serial flash */
@@ -1962,11 +1992,21 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 
        /* 627EHG and 627EHF have 10 voltage inputs; 627DHG and 667HG have 9 */
        data->in_num = (sio_data->kind == w83627ehf) ? 10 : 9;
-       /* 667HG, NCT6775F, and NCT6776F have 3 pwms */
-       data->pwm_num = (sio_data->kind == w83667hg
-                        || sio_data->kind == w83667hg_b
-                        || sio_data->kind == nct6775
-                        || sio_data->kind == nct6776) ? 3 : 4;
+       /* 667HG, NCT6775F, and NCT6776F have 3 pwms, and 627UHG has only 2 */
+       switch (sio_data->kind) {
+       default:
+               data->pwm_num = 4;
+               break;
+       case w83667hg:
+       case w83667hg_b:
+       case nct6775:
+       case nct6776:
+               data->pwm_num = 3;
+               break;
+       case w83627uhg:
+               data->pwm_num = 2;
+               break;
+       }
 
        /* Default to 3 temperature inputs, code below will adjust as needed */
        data->have_temp = 0x07;
@@ -2085,6 +2125,42 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
                        data->in6_skip = 1;
 
                data->temp_label = w83667hg_b_temp_label;
+       } else if (sio_data->kind == w83627uhg) {
+               u8 reg;
+
+               w83627ehf_set_temp_reg_ehf(data, 3);
+
+               /*
+                * Temperature sources for temp1 and temp2 are selected with
+                * bank 0, registers 0x49 and 0x4a.
+                */
+               data->temp_src[0] = 0;  /* SYSTIN */
+               reg = w83627ehf_read_value(data, 0x49) & 0x07;
+               /* Adjust to have the same mapping as other source registers */
+               if (reg == 0)
+                       data->temp_src[1]++;
+               else if (reg >= 2 && reg <= 5)
+                       data->temp_src[1] += 2;
+               else    /* should never happen */
+                       data->have_temp &= ~(1 << 1);
+               reg = w83627ehf_read_value(data, 0x4a);
+               data->temp_src[2] = reg >> 5;
+
+               /*
+                * Skip temp3 if source is invalid or the same as temp1
+                * or temp2.
+                */
+               if (data->temp_src[2] == 2 || data->temp_src[2] == 3 ||
+                   data->temp_src[2] == data->temp_src[0] ||
+                   ((data->have_temp & (1 << 1)) &&
+                    data->temp_src[2] == data->temp_src[1]))
+                       data->have_temp &= ~(1 << 2);
+               else
+                       data->temp3_val_only = 1;       /* No limit regs */
+
+               data->in6_skip = 1;                     /* No VIN3 */
+
+               data->temp_label = w83667hg_b_temp_label;
        } else {
                w83627ehf_set_temp_reg_ehf(data, 3);
 
@@ -2162,6 +2238,12 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
                  W83627EHF_REG_FAN_STEP_OUTPUT_COMMON;
        }
 
+       /* Setup input voltage scaling factors */
+       if (sio_data->kind == w83627uhg)
+               data->scale_in = scale_in_w83627uhg;
+       else
+               data->scale_in = scale_in_common;
+
        /* Initialize the chip */
        w83627ehf_init_device(data, sio_data->kind);
 
@@ -2178,7 +2260,7 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
                err = device_create_file(dev, &dev_attr_cpu0_vid);
                if (err)
                        goto exit_release;
-       } else {
+       } else if (sio_data->kind != w83627uhg) {
                superio_select(sio_data->sioreg, W83627EHF_LD_HWM);
                if (superio_inb(sio_data->sioreg, SIO_REG_VID_CTRL) & 0x80) {
                        /* Set VID input sensibility if needed. In theory the
@@ -2268,7 +2350,14 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
                                goto exit_remove;
                }
        }
-       /* if fan4 is enabled create the sf3 files for it */
+       /* if fan3 and fan4 are enabled create the sf3 files for them */
+       if ((data->has_fan & (1 << 2)) && data->pwm_num >= 3)
+               for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan3); i++) {
+                       err = device_create_file(dev,
+                                       &sda_sf3_arrays_fan3[i].dev_attr);
+                       if (err)
+                               goto exit_remove;
+               }
        if ((data->has_fan & (1 << 3)) && data->pwm_num >= 4)
                for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++) {
                        err = device_create_file(dev,
@@ -2336,6 +2425,8 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
                        if (err)
                                goto exit_remove;
                }
+               if (i == 2 && data->temp3_val_only)
+                       continue;
                if (data->reg_temp_over[i]) {
                        err = device_create_file(dev,
                                &sda_temp_max[i].dev_attr);
@@ -2419,6 +2510,7 @@ static int __init w83627ehf_find(int sioaddr, unsigned short *addr,
        static const char __initdata sio_name_W83627EHG[] = "W83627EHG";
        static const char __initdata sio_name_W83627DHG[] = "W83627DHG";
        static const char __initdata sio_name_W83627DHG_P[] = "W83627DHG-P";
+       static const char __initdata sio_name_W83627UHG[] = "W83627UHG";
        static const char __initdata sio_name_W83667HG[] = "W83667HG";
        static const char __initdata sio_name_W83667HG_B[] = "W83667HG-B";
        static const char __initdata sio_name_NCT6775[] = "NCT6775F";
@@ -2451,6 +2543,10 @@ static int __init w83627ehf_find(int sioaddr, unsigned short *addr,
                sio_data->kind = w83627dhg_p;
                sio_name = sio_name_W83627DHG_P;
                break;
+       case SIO_W83627UHG_ID:
+               sio_data->kind = w83627uhg;
+               sio_name = sio_name_W83627UHG;
+               break;
        case SIO_W83667HG_ID:
                sio_data->kind = w83667hg;
                sio_name = sio_name_W83667HG;