diff options
| -rw-r--r-- | drivers/hwmon/w83781d.c | 197 |
1 files changed, 117 insertions, 80 deletions
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c index e8a1900..cbed525 100644 --- a/drivers/hwmon/w83781d.c +++ b/drivers/hwmon/w83781d.c @@ -1,37 +1,37 @@ /* - w83781d.c - Part of lm_sensors, Linux kernel modules for hardware - monitoring - Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, - Philip Edelbrock <phil@netroedge.com>, - and Mark Studebaker <mdsxyz123@yahoo.com> - Copyright (c) 2007 - 2008 Jean Delvare <khali@linux-fr.org> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ + * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware + * monitoring + * Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, + * Philip Edelbrock <phil@netroedge.com>, + * and Mark Studebaker <mdsxyz123@yahoo.com> + * Copyright (c) 2007 - 2008 Jean Delvare <khali@linux-fr.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ /* - Supports following chips: - - Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA - as99127f 7 3 0 3 0x31 0x12c3 yes no - as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no - w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes - w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes - w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no - -*/ + * Supports following chips: + * + * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA + * as99127f 7 3 0 3 0x31 0x12c3 yes no + * as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no + * w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes + * w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes + * w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no + * + */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -145,8 +145,10 @@ static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F }; #define W83781D_REG_I2C_ADDR 0x48 #define W83781D_REG_I2C_SUBADDR 0x4A -/* The following are undocumented in the data sheets however we - received the information in an email from Winbond tech support */ +/* + * The following are undocumented in the data sheets however we + * received the information in an email from Winbond tech support + */ /* Sensor selection - not on 781d */ #define W83781D_REG_SCFG1 0x5D static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 }; @@ -238,9 +240,11 @@ struct w83781d_data { u32 beep_mask; /* Register encoding, combined */ u8 pwm[4]; /* Register value */ u8 pwm2_enable; /* Boolean */ - u16 sens[3]; /* 782D/783S only. - 1 = pentium diode; 2 = 3904 diode; - 4 = thermistor */ + u16 sens[3]; /* + * 782D/783S only. + * 1 = pentium diode; 2 = 3904 diode; + * 4 = thermistor + */ u8 vrm; }; @@ -636,10 +640,12 @@ show_fan_div(struct device *dev, struct device_attribute *da, char *buf) (long) DIV_FROM_REG(data->fan_div[attr->index])); } -/* Note: we save and restore the fan minimum here, because its value is - determined in part by the fan divisor. This follows the principle of - least surprise; the user doesn't expect the fan minimum to change just - because the divisor changed. */ +/* + * Note: we save and restore the fan minimum here, because its value is + * determined in part by the fan divisor. This follows the principle of + * least surprise; the user doesn't expect the fan minimum to change just + * because the divisor changed. + */ static ssize_t store_fan_div(struct device *dev, struct device_attribute *da, const char *buf, size_t count) @@ -847,7 +853,8 @@ static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_sensor, store_sensor, 2); -/* Assumes that adapter is of I2C, not ISA variety. +/* + * Assumes that adapter is of I2C, not ISA variety. * OTHERWISE DON'T CALL THIS */ static int @@ -1102,9 +1109,11 @@ w83781d_detect(struct i2c_client *client, struct i2c_board_info *info) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; - /* We block updates of the ISA device to minimize the risk of - concurrent access to the same W83781D chip through different - interfaces. */ + /* + * We block updates of the ISA device to minimize the risk of + * concurrent access to the same W83781D chip through different + * interfaces. + */ if (isa) mutex_lock(&isa->update_lock); @@ -1124,8 +1133,10 @@ w83781d_detect(struct i2c_client *client, struct i2c_board_info *info) "Detection of w83781d chip failed at step 4\n"); goto err_nodev; } - /* If Winbond SMBus, check address at 0x48. - Asus doesn't support, except for as99127f rev.2 */ + /* + * If Winbond SMBus, check address at 0x48. + * Asus doesn't support, except for as99127f rev.2 + */ if ((!(val1 & 0x80) && val2 == 0xa3) || ((val1 & 0x80) && val2 == 0x5c)) { if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR) @@ -1346,25 +1357,33 @@ w83781d_init_device(struct device *dev) int type = data->type; u8 tmp; - if (reset && type != as99127f) { /* this resets registers we don't have - documentation for on the as99127f */ - /* Resetting the chip has been the default for a long time, - but it causes the BIOS initializations (fan clock dividers, - thermal sensor types...) to be lost, so it is now optional. - It might even go away if nobody reports it as being useful, - as I see very little reason why this would be needed at - all. */ + if (reset && type != as99127f) { /* + * this resets registers we don't have + * documentation for on the as99127f + */ + /* + * Resetting the chip has been the default for a long time, + * but it causes the BIOS initializations (fan clock dividers, + * thermal sensor types...) to be lost, so it is now optional. + * It might even go away if nobody reports it as being useful, + * as I see very little reason why this would be needed at + * all. + */ dev_info(dev, "If reset=1 solved a problem you were " "having, please report!\n"); /* save these registers */ i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); p = w83781d_read_value(data, W83781D_REG_PWMCLK12); - /* Reset all except Watchdog values and last conversion values - This sets fan-divs to 2, among others */ + /* + * Reset all except Watchdog values and last conversion values + * This sets fan-divs to 2, among others + */ w83781d_write_value(data, W83781D_REG_CONFIG, 0x80); - /* Restore the registers and disable power-on abnormal beep. - This saves FAN 1/2/3 input/output values set by BIOS. */ + /* + * Restore the registers and disable power-on abnormal beep. + * This saves FAN 1/2/3 input/output values set by BIOS. + */ w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); w83781d_write_value(data, W83781D_REG_PWMCLK12, p); /* @@ -1375,8 +1394,10 @@ w83781d_init_device(struct device *dev) w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0); } - /* Disable power-on abnormal beep, as advised by the datasheet. - Already done if reset=1. */ + /* + * Disable power-on abnormal beep, as advised by the datasheet. + * Already done if reset=1. + */ if (init && !reset && type != as99127f) { i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG); w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80); @@ -1533,8 +1554,10 @@ static struct w83781d_data *w83781d_update_device(struct device *dev) | (w83781d_read_value(data, W83782D_REG_ALARM2) << 8); } else { - /* No real-time status registers, fall back to - interrupt status registers */ + /* + * No real-time status registers, fall back to + * interrupt status registers + */ data->alarms = w83781d_read_value(data, W83781D_REG_ALARM1) | (w83781d_read_value(data, @@ -1588,8 +1611,10 @@ static struct platform_device *pdev; static unsigned short isa_address = 0x290; -/* I2C devices get this name attribute automatically, but for ISA devices - we must create it by ourselves. */ +/* + * I2C devices get this name attribute automatically, but for ISA devices + * we must create it by ourselves. + */ static ssize_t show_name(struct device *dev, struct device_attribute *devattr, char *buf) { @@ -1619,8 +1644,10 @@ static int w83781d_alias_detect(struct i2c_client *client, u8 chipid) if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid) return 0; /* Chip type doesn't match */ - /* We compare all the limit registers, the config register and the - * interrupt mask registers */ + /* + * We compare all the limit registers, the config register and the + * interrupt mask registers + */ for (i = 0x2b; i <= 0x3d; i++) { if (w83781d_read_value(isa, i) != i2c_smbus_read_byte_data(client, i)) @@ -1701,12 +1728,14 @@ w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value) } } -/* The SMBus locks itself, usually, but nothing may access the Winbond between - bank switches. ISA access must always be locked explicitly! - We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, - would slow down the W83781D access and should not be necessary. - There are some ugly typecasts here, but the good news is - they should - nowhere else be necessary! */ +/* + * The SMBus locks itself, usually, but nothing may access the Winbond between + * bank switches. ISA access must always be locked explicitly! + * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, + * would slow down the W83781D access and should not be necessary. + * There are some ugly typecasts here, but the good news is - they should + * nowhere else be necessary! + */ static int w83781d_read_value(struct w83781d_data *data, u16 reg) { @@ -1833,9 +1862,11 @@ w83781d_isa_found(unsigned short address) int val, save, found = 0; int port; - /* Some boards declare base+0 to base+7 as a PNP device, some base+4 + /* + * Some boards declare base+0 to base+7 as a PNP device, some base+4 * to base+7 and some base+5 to base+6. So we better request each port - * individually for the probing phase. */ + * individually for the probing phase. + */ for (port = address; port < address + W83781D_EXTENT; port++) { if (!request_region(port, 1, "w83781d")) { pr_debug("Failed to request port 0x%x\n", port); @@ -1844,8 +1875,10 @@ w83781d_isa_found(unsigned short address) } #define REALLY_SLOW_IO - /* We need the timeouts for at least some W83781D-like - chips. But only if we read 'undefined' registers. */ + /* + * We need the timeouts for at least some W83781D-like + * chips. But only if we read 'undefined' registers. + */ val = inb_p(address + 1); if (inb_p(address + 2) != val || inb_p(address + 3) != val @@ -1855,8 +1888,10 @@ w83781d_isa_found(unsigned short address) } #undef REALLY_SLOW_IO - /* We should be able to change the 7 LSB of the address port. The - MSB (busy flag) should be clear initially, set after the write. */ + /* + * We should be able to change the 7 LSB of the address port. The + * MSB (busy flag) should be clear initially, set after the write. + */ save = inb_p(address + W83781D_ADDR_REG_OFFSET); if (save & 0x80) { pr_debug("Detection failed at step %d\n", 2); @@ -2042,8 +2077,10 @@ sensors_w83781d_init(void) { int res; - /* We register the ISA device first, so that we can skip the - * registration of an I2C interface to the same device. */ + /* + * We register the ISA device first, so that we can skip the + * registration of an I2C interface to the same device. + */ res = w83781d_isa_register(); if (res) goto exit; |
