![Jean Delvare](/assets/img/avatar_default.png)
This patch kills another macro abuse in the via686a hardware monitoring driver. Using a macro just to alias an array is quite useless, isn't it? Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
876 lines
31 KiB
C
876 lines
31 KiB
C
/*
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via686a.c - Part of lm_sensors, Linux kernel modules
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for hardware monitoring
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Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
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Kyösti Mälkki <kmalkki@cc.hut.fi>,
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Mark Studebaker <mdsxyz123@yahoo.com>,
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and Bob Dougherty <bobd@stanford.edu>
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(Some conversion-factor data were contributed by Jonathan Teh Soon Yew
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<j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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Supports the Via VT82C686A, VT82C686B south bridges.
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Reports all as a 686A.
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Warning - only supports a single device.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/i2c-sensor.h>
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#include <linux/init.h>
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#include <asm/io.h>
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/* If force_addr is set to anything different from 0, we forcibly enable
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the device at the given address. */
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static unsigned short force_addr = 0;
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module_param(force_addr, ushort, 0);
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MODULE_PARM_DESC(force_addr,
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"Initialize the base address of the sensors");
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/* Addresses to scan.
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Note that we can't determine the ISA address until we have initialized
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our module */
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static unsigned short normal_i2c[] = { I2C_CLIENT_END };
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static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END };
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/* Insmod parameters */
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SENSORS_INSMOD_1(via686a);
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/*
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The Via 686a southbridge has a LM78-like chip integrated on the same IC.
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This driver is a customized copy of lm78.c
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*/
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/* Many VIA686A constants specified below */
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/* Length of ISA address segment */
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#define VIA686A_EXTENT 0x80
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#define VIA686A_BASE_REG 0x70
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#define VIA686A_ENABLE_REG 0x74
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/* The VIA686A registers */
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/* ins numbered 0-4 */
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#define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
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#define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
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#define VIA686A_REG_IN(nr) (0x22 + (nr))
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/* fans numbered 1-2 */
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#define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
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#define VIA686A_REG_FAN(nr) (0x28 + (nr))
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/* temps numbered 1-3 */
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static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f };
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static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d };
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static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e };
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/* bits 7-6 */
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#define VIA686A_REG_TEMP_LOW1 0x4b
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/* 2 = bits 5-4, 3 = bits 7-6 */
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#define VIA686A_REG_TEMP_LOW23 0x49
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#define VIA686A_REG_ALARM1 0x41
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#define VIA686A_REG_ALARM2 0x42
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#define VIA686A_REG_FANDIV 0x47
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#define VIA686A_REG_CONFIG 0x40
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/* The following register sets temp interrupt mode (bits 1-0 for temp1,
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3-2 for temp2, 5-4 for temp3). Modes are:
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00 interrupt stays as long as value is out-of-range
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01 interrupt is cleared once register is read (default)
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10 comparator mode- like 00, but ignores hysteresis
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11 same as 00 */
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#define VIA686A_REG_TEMP_MODE 0x4b
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/* We'll just assume that you want to set all 3 simultaneously: */
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#define VIA686A_TEMP_MODE_MASK 0x3F
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#define VIA686A_TEMP_MODE_CONTINUOUS 0x00
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/* Conversions. Limit checking is only done on the TO_REG
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variants.
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********* VOLTAGE CONVERSIONS (Bob Dougherty) ********
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From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
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voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
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voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
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voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
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voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
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voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
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in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
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That is:
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volts = (25*regVal+133)*factor
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regVal = (volts/factor-133)/25
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(These conversions were contributed by Jonathan Teh Soon Yew
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<j.teh@iname.com>) */
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static inline u8 IN_TO_REG(long val, int inNum)
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{
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/* To avoid floating point, we multiply constants by 10 (100 for +12V).
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Rounding is done (120500 is actually 133000 - 12500).
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Remember that val is expressed in 0.001V/bit, which is why we divide
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by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
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for the constants. */
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if (inNum <= 1)
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return (u8)
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SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
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else if (inNum == 2)
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return (u8)
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SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
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else if (inNum == 3)
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return (u8)
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SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
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else
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return (u8)
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SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
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}
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static inline long IN_FROM_REG(u8 val, int inNum)
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{
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/* To avoid floating point, we multiply constants by 10 (100 for +12V).
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We also multiply them by 1000 because we want 0.001V/bit for the
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output value. Rounding is done. */
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if (inNum <= 1)
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return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
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else if (inNum == 2)
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return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
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else if (inNum == 3)
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return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
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else
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return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
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}
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/********* FAN RPM CONVERSIONS ********/
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/* Higher register values = slower fans (the fan's strobe gates a counter).
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But this chip saturates back at 0, not at 255 like all the other chips.
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So, 0 means 0 RPM */
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static inline u8 FAN_TO_REG(long rpm, int div)
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{
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if (rpm == 0)
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return 0;
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rpm = SENSORS_LIMIT(rpm, 1, 1000000);
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return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
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}
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#define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div)))
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/******** TEMP CONVERSIONS (Bob Dougherty) *********/
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/* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
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if(temp<169)
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return double(temp)*0.427-32.08;
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else if(temp>=169 && temp<=202)
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return double(temp)*0.582-58.16;
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else
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return double(temp)*0.924-127.33;
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A fifth-order polynomial fits the unofficial data (provided by Alex van
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Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
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numbers on my machine (ie. they agree with what my BIOS tells me).
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Here's the fifth-order fit to the 8-bit data:
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temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
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2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
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(2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
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finding my typos in this formula!)
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Alas, none of the elegant function-fit solutions will work because we
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aren't allowed to use floating point in the kernel and doing it with
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integers doesn't provide enough precision. So we'll do boring old
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look-up table stuff. The unofficial data (see below) have effectively
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7-bit resolution (they are rounded to the nearest degree). I'm assuming
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that the transfer function of the device is monotonic and smooth, so a
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smooth function fit to the data will allow us to get better precision.
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I used the 5th-order poly fit described above and solved for
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VIA register values 0-255. I *10 before rounding, so we get tenth-degree
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precision. (I could have done all 1024 values for our 10-bit readings,
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but the function is very linear in the useful range (0-80 deg C), so
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we'll just use linear interpolation for 10-bit readings.) So, tempLUT
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is the temp at via register values 0-255: */
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static const long tempLUT[] =
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{ -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
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-503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
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-362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
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-255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
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-173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
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-108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
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-44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
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20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
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88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
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142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
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193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
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245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
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299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
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353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
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409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
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469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
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538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
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621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
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728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
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870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
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1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
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1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
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};
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/* the original LUT values from Alex van Kaam <darkside@chello.nl>
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(for via register values 12-240):
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{-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
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-30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
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-15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
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-3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12,
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12,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22,
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22,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33,
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33,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45,
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45,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60,
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61,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84,
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85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
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Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
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an extra term for a good fit to these inverse data!) and then
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solving for each temp value from -50 to 110 (the useable range for
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this chip). Here's the fit:
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viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
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- 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
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Note that n=161: */
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static const u8 viaLUT[] =
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{ 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
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23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
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41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
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69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
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103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
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131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
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158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
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182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
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200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
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214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
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225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
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233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
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239, 240
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};
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/* Converting temps to (8-bit) hyst and over registers
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No interpolation here.
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The +50 is because the temps start at -50 */
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static inline u8 TEMP_TO_REG(long val)
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{
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return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
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(val < 0 ? val - 500 : val + 500) / 1000 + 50];
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}
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/* for 8-bit temperature hyst and over registers */
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#define TEMP_FROM_REG(val) (tempLUT[(val)] * 100)
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/* for 10-bit temperature readings */
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static inline long TEMP_FROM_REG10(u16 val)
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{
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u16 eightBits = val >> 2;
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u16 twoBits = val & 3;
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/* no interpolation for these */
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if (twoBits == 0 || eightBits == 255)
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return TEMP_FROM_REG(eightBits);
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/* do some linear interpolation */
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return (tempLUT[eightBits] * (4 - twoBits) +
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tempLUT[eightBits + 1] * twoBits) * 25;
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}
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#define DIV_FROM_REG(val) (1 << (val))
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#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
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/* For the VIA686A, we need to keep some data in memory.
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The structure is dynamically allocated, at the same time when a new
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via686a client is allocated. */
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struct via686a_data {
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struct i2c_client client;
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struct semaphore update_lock;
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char valid; /* !=0 if following fields are valid */
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unsigned long last_updated; /* In jiffies */
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u8 in[5]; /* Register value */
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u8 in_max[5]; /* Register value */
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u8 in_min[5]; /* Register value */
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u8 fan[2]; /* Register value */
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u8 fan_min[2]; /* Register value */
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u16 temp[3]; /* Register value 10 bit */
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u8 temp_over[3]; /* Register value */
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u8 temp_hyst[3]; /* Register value */
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u8 fan_div[2]; /* Register encoding, shifted right */
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u16 alarms; /* Register encoding, combined */
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};
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static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
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static int via686a_attach_adapter(struct i2c_adapter *adapter);
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static int via686a_detect(struct i2c_adapter *adapter, int address, int kind);
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static int via686a_detach_client(struct i2c_client *client);
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static inline int via686a_read_value(struct i2c_client *client, u8 reg)
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{
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return (inb_p(client->addr + reg));
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}
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static inline void via686a_write_value(struct i2c_client *client, u8 reg,
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u8 value)
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{
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outb_p(value, client->addr + reg);
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}
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static struct via686a_data *via686a_update_device(struct device *dev);
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static void via686a_init_client(struct i2c_client *client);
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/* following are the sysfs callback functions */
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/* 7 voltage sensors */
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static ssize_t show_in(struct device *dev, char *buf, int nr) {
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struct via686a_data *data = via686a_update_device(dev);
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return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
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}
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static ssize_t show_in_min(struct device *dev, char *buf, int nr) {
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struct via686a_data *data = via686a_update_device(dev);
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return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
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}
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static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
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struct via686a_data *data = via686a_update_device(dev);
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return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
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}
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static ssize_t set_in_min(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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down(&data->update_lock);
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data->in_min[nr] = IN_TO_REG(val, nr);
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via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
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data->in_min[nr]);
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up(&data->update_lock);
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return count;
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}
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static ssize_t set_in_max(struct device *dev, const char *buf,
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size_t count, int nr) {
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struct i2c_client *client = to_i2c_client(dev);
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struct via686a_data *data = i2c_get_clientdata(client);
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unsigned long val = simple_strtoul(buf, NULL, 10);
|
|
|
|
down(&data->update_lock);
|
|
data->in_max[nr] = IN_TO_REG(val, nr);
|
|
via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
|
|
data->in_max[nr]);
|
|
up(&data->update_lock);
|
|
return count;
|
|
}
|
|
#define show_in_offset(offset) \
|
|
static ssize_t \
|
|
show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_in(dev, buf, offset); \
|
|
} \
|
|
static ssize_t \
|
|
show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_in_min(dev, buf, offset); \
|
|
} \
|
|
static ssize_t \
|
|
show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_in_max(dev, buf, offset); \
|
|
} \
|
|
static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
return set_in_min(dev, buf, count, offset); \
|
|
} \
|
|
static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
return set_in_max(dev, buf, count, offset); \
|
|
} \
|
|
static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);\
|
|
static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_in##offset##_min, set_in##offset##_min); \
|
|
static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
|
|
show_in##offset##_max, set_in##offset##_max);
|
|
|
|
show_in_offset(0);
|
|
show_in_offset(1);
|
|
show_in_offset(2);
|
|
show_in_offset(3);
|
|
show_in_offset(4);
|
|
|
|
/* 3 temperatures */
|
|
static ssize_t show_temp(struct device *dev, char *buf, int nr) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
|
|
}
|
|
static ssize_t show_temp_over(struct device *dev, char *buf, int nr) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
|
|
}
|
|
static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
|
|
}
|
|
static ssize_t set_temp_over(struct device *dev, const char *buf,
|
|
size_t count, int nr) {
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct via686a_data *data = i2c_get_clientdata(client);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
down(&data->update_lock);
|
|
data->temp_over[nr] = TEMP_TO_REG(val);
|
|
via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr],
|
|
data->temp_over[nr]);
|
|
up(&data->update_lock);
|
|
return count;
|
|
}
|
|
static ssize_t set_temp_hyst(struct device *dev, const char *buf,
|
|
size_t count, int nr) {
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct via686a_data *data = i2c_get_clientdata(client);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
down(&data->update_lock);
|
|
data->temp_hyst[nr] = TEMP_TO_REG(val);
|
|
via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr],
|
|
data->temp_hyst[nr]);
|
|
up(&data->update_lock);
|
|
return count;
|
|
}
|
|
#define show_temp_offset(offset) \
|
|
static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_temp(dev, buf, offset - 1); \
|
|
} \
|
|
static ssize_t \
|
|
show_temp_##offset##_over (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_temp_over(dev, buf, offset - 1); \
|
|
} \
|
|
static ssize_t \
|
|
show_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_temp_hyst(dev, buf, offset - 1); \
|
|
} \
|
|
static ssize_t set_temp_##offset##_over (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
return set_temp_over(dev, buf, count, offset - 1); \
|
|
} \
|
|
static ssize_t set_temp_##offset##_hyst (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
return set_temp_hyst(dev, buf, count, offset - 1); \
|
|
} \
|
|
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL);\
|
|
static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
|
|
show_temp_##offset##_over, set_temp_##offset##_over); \
|
|
static DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
|
|
show_temp_##offset##_hyst, set_temp_##offset##_hyst);
|
|
|
|
show_temp_offset(1);
|
|
show_temp_offset(2);
|
|
show_temp_offset(3);
|
|
|
|
/* 2 Fans */
|
|
static ssize_t show_fan(struct device *dev, char *buf, int nr) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
|
|
DIV_FROM_REG(data->fan_div[nr])) );
|
|
}
|
|
static ssize_t show_fan_min(struct device *dev, char *buf, int nr) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%d\n",
|
|
FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) );
|
|
}
|
|
static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
|
|
}
|
|
static ssize_t set_fan_min(struct device *dev, const char *buf,
|
|
size_t count, int nr) {
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct via686a_data *data = i2c_get_clientdata(client);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
down(&data->update_lock);
|
|
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
|
|
via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
|
|
up(&data->update_lock);
|
|
return count;
|
|
}
|
|
static ssize_t set_fan_div(struct device *dev, const char *buf,
|
|
size_t count, int nr) {
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct via686a_data *data = i2c_get_clientdata(client);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
int old;
|
|
|
|
down(&data->update_lock);
|
|
old = via686a_read_value(client, VIA686A_REG_FANDIV);
|
|
data->fan_div[nr] = DIV_TO_REG(val);
|
|
old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
|
|
via686a_write_value(client, VIA686A_REG_FANDIV, old);
|
|
up(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
#define show_fan_offset(offset) \
|
|
static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_fan(dev, buf, offset - 1); \
|
|
} \
|
|
static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_fan_min(dev, buf, offset - 1); \
|
|
} \
|
|
static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
return show_fan_div(dev, buf, offset - 1); \
|
|
} \
|
|
static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
return set_fan_min(dev, buf, count, offset - 1); \
|
|
} \
|
|
static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
return set_fan_div(dev, buf, count, offset - 1); \
|
|
} \
|
|
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
|
|
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_fan_##offset##_min, set_fan_##offset##_min); \
|
|
static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
|
|
show_fan_##offset##_div, set_fan_##offset##_div);
|
|
|
|
show_fan_offset(1);
|
|
show_fan_offset(2);
|
|
|
|
/* Alarms */
|
|
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) {
|
|
struct via686a_data *data = via686a_update_device(dev);
|
|
return sprintf(buf, "%u\n", data->alarms);
|
|
}
|
|
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
|
|
|
|
/* The driver. I choose to use type i2c_driver, as at is identical to both
|
|
smbus_driver and isa_driver, and clients could be of either kind */
|
|
static struct i2c_driver via686a_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "via686a",
|
|
.id = I2C_DRIVERID_VIA686A,
|
|
.flags = I2C_DF_NOTIFY,
|
|
.attach_adapter = via686a_attach_adapter,
|
|
.detach_client = via686a_detach_client,
|
|
};
|
|
|
|
|
|
/* This is called when the module is loaded */
|
|
static int via686a_attach_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
if (!(adapter->class & I2C_CLASS_HWMON))
|
|
return 0;
|
|
return i2c_detect(adapter, &addr_data, via686a_detect);
|
|
}
|
|
|
|
static int via686a_detect(struct i2c_adapter *adapter, int address, int kind)
|
|
{
|
|
struct i2c_client *new_client;
|
|
struct via686a_data *data;
|
|
int err = 0;
|
|
const char client_name[] = "via686a";
|
|
u16 val;
|
|
|
|
/* Make sure we are probing the ISA bus!! */
|
|
if (!i2c_is_isa_adapter(adapter)) {
|
|
dev_err(&adapter->dev,
|
|
"via686a_detect called for an I2C bus adapter?!?\n");
|
|
return 0;
|
|
}
|
|
|
|
/* 8231 requires multiple of 256, we enforce that on 686 as well */
|
|
if (force_addr)
|
|
address = force_addr & 0xFF00;
|
|
|
|
if (force_addr) {
|
|
dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n",
|
|
address);
|
|
if (PCIBIOS_SUCCESSFUL !=
|
|
pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
|
|
return -ENODEV;
|
|
}
|
|
if (PCIBIOS_SUCCESSFUL !=
|
|
pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
|
|
return -ENODEV;
|
|
if (!(val & 0x0001)) {
|
|
dev_warn(&adapter->dev, "enabling sensors\n");
|
|
if (PCIBIOS_SUCCESSFUL !=
|
|
pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
|
|
val | 0x0001))
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Reserve the ISA region */
|
|
if (!request_region(address, VIA686A_EXTENT, via686a_driver.name)) {
|
|
dev_err(&adapter->dev, "region 0x%x already in use!\n",
|
|
address);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!(data = kmalloc(sizeof(struct via686a_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto ERROR0;
|
|
}
|
|
memset(data, 0, sizeof(struct via686a_data));
|
|
|
|
new_client = &data->client;
|
|
i2c_set_clientdata(new_client, data);
|
|
new_client->addr = address;
|
|
new_client->adapter = adapter;
|
|
new_client->driver = &via686a_driver;
|
|
new_client->flags = 0;
|
|
|
|
/* Fill in the remaining client fields and put into the global list */
|
|
strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
|
|
|
|
data->valid = 0;
|
|
init_MUTEX(&data->update_lock);
|
|
/* Tell the I2C layer a new client has arrived */
|
|
if ((err = i2c_attach_client(new_client)))
|
|
goto ERROR3;
|
|
|
|
/* Initialize the VIA686A chip */
|
|
via686a_init_client(new_client);
|
|
|
|
/* Register sysfs hooks */
|
|
device_create_file(&new_client->dev, &dev_attr_in0_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in1_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in2_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in3_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in4_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in0_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in1_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in2_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in3_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in4_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in0_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in1_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in2_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in3_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in4_max);
|
|
device_create_file(&new_client->dev, &dev_attr_temp1_input);
|
|
device_create_file(&new_client->dev, &dev_attr_temp2_input);
|
|
device_create_file(&new_client->dev, &dev_attr_temp3_input);
|
|
device_create_file(&new_client->dev, &dev_attr_temp1_max);
|
|
device_create_file(&new_client->dev, &dev_attr_temp2_max);
|
|
device_create_file(&new_client->dev, &dev_attr_temp3_max);
|
|
device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
|
|
device_create_file(&new_client->dev, &dev_attr_temp2_max_hyst);
|
|
device_create_file(&new_client->dev, &dev_attr_temp3_max_hyst);
|
|
device_create_file(&new_client->dev, &dev_attr_fan1_input);
|
|
device_create_file(&new_client->dev, &dev_attr_fan2_input);
|
|
device_create_file(&new_client->dev, &dev_attr_fan1_min);
|
|
device_create_file(&new_client->dev, &dev_attr_fan2_min);
|
|
device_create_file(&new_client->dev, &dev_attr_fan1_div);
|
|
device_create_file(&new_client->dev, &dev_attr_fan2_div);
|
|
device_create_file(&new_client->dev, &dev_attr_alarms);
|
|
|
|
return 0;
|
|
|
|
ERROR3:
|
|
kfree(data);
|
|
ERROR0:
|
|
release_region(address, VIA686A_EXTENT);
|
|
return err;
|
|
}
|
|
|
|
static int via686a_detach_client(struct i2c_client *client)
|
|
{
|
|
int err;
|
|
|
|
if ((err = i2c_detach_client(client))) {
|
|
dev_err(&client->dev,
|
|
"Client deregistration failed, client not detached.\n");
|
|
return err;
|
|
}
|
|
|
|
release_region(client->addr, VIA686A_EXTENT);
|
|
kfree(i2c_get_clientdata(client));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called when we have found a new VIA686A. Set limits, etc. */
|
|
static void via686a_init_client(struct i2c_client *client)
|
|
{
|
|
u8 reg;
|
|
|
|
/* Start monitoring */
|
|
reg = via686a_read_value(client, VIA686A_REG_CONFIG);
|
|
via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
|
|
|
|
/* Configure temp interrupt mode for continuous-interrupt operation */
|
|
via686a_write_value(client, VIA686A_REG_TEMP_MODE,
|
|
via686a_read_value(client, VIA686A_REG_TEMP_MODE) &
|
|
!(VIA686A_TEMP_MODE_MASK | VIA686A_TEMP_MODE_CONTINUOUS));
|
|
}
|
|
|
|
static struct via686a_data *via686a_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct via686a_data *data = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
down(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|
|
|| !data->valid) {
|
|
for (i = 0; i <= 4; i++) {
|
|
data->in[i] =
|
|
via686a_read_value(client, VIA686A_REG_IN(i));
|
|
data->in_min[i] = via686a_read_value(client,
|
|
VIA686A_REG_IN_MIN
|
|
(i));
|
|
data->in_max[i] =
|
|
via686a_read_value(client, VIA686A_REG_IN_MAX(i));
|
|
}
|
|
for (i = 1; i <= 2; i++) {
|
|
data->fan[i - 1] =
|
|
via686a_read_value(client, VIA686A_REG_FAN(i));
|
|
data->fan_min[i - 1] = via686a_read_value(client,
|
|
VIA686A_REG_FAN_MIN(i));
|
|
}
|
|
for (i = 0; i <= 2; i++) {
|
|
data->temp[i] = via686a_read_value(client,
|
|
VIA686A_REG_TEMP[i]) << 2;
|
|
data->temp_over[i] =
|
|
via686a_read_value(client,
|
|
VIA686A_REG_TEMP_OVER[i]);
|
|
data->temp_hyst[i] =
|
|
via686a_read_value(client,
|
|
VIA686A_REG_TEMP_HYST[i]);
|
|
}
|
|
/* add in lower 2 bits
|
|
temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
|
|
temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
|
|
temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
|
|
*/
|
|
data->temp[0] |= (via686a_read_value(client,
|
|
VIA686A_REG_TEMP_LOW1)
|
|
& 0xc0) >> 6;
|
|
data->temp[1] |=
|
|
(via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
|
|
0x30) >> 4;
|
|
data->temp[2] |=
|
|
(via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
|
|
0xc0) >> 6;
|
|
|
|
i = via686a_read_value(client, VIA686A_REG_FANDIV);
|
|
data->fan_div[0] = (i >> 4) & 0x03;
|
|
data->fan_div[1] = i >> 6;
|
|
data->alarms =
|
|
via686a_read_value(client,
|
|
VIA686A_REG_ALARM1) |
|
|
(via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
|
|
up(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
static struct pci_device_id via686a_pci_ids[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
|
|
|
|
static int __devinit via686a_pci_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
u16 val;
|
|
int addr = 0;
|
|
|
|
if (PCIBIOS_SUCCESSFUL !=
|
|
pci_read_config_word(dev, VIA686A_BASE_REG, &val))
|
|
return -ENODEV;
|
|
|
|
addr = val & ~(VIA686A_EXTENT - 1);
|
|
if (addr == 0 && force_addr == 0) {
|
|
dev_err(&dev->dev, "base address not set - upgrade BIOS "
|
|
"or use force_addr=0xaddr\n");
|
|
return -ENODEV;
|
|
}
|
|
if (force_addr)
|
|
addr = force_addr; /* so detect will get called */
|
|
|
|
if (!addr) {
|
|
dev_err(&dev->dev, "No Via 686A sensors found.\n");
|
|
return -ENODEV;
|
|
}
|
|
normal_isa[0] = addr;
|
|
|
|
s_bridge = pci_dev_get(dev);
|
|
if (i2c_add_driver(&via686a_driver)) {
|
|
pci_dev_put(s_bridge);
|
|
s_bridge = NULL;
|
|
}
|
|
|
|
/* Always return failure here. This is to allow other drivers to bind
|
|
* to this pci device. We don't really want to have control over the
|
|
* pci device, we only wanted to read as few register values from it.
|
|
*/
|
|
return -ENODEV;
|
|
}
|
|
|
|
static struct pci_driver via686a_pci_driver = {
|
|
.name = "via686a",
|
|
.id_table = via686a_pci_ids,
|
|
.probe = via686a_pci_probe,
|
|
};
|
|
|
|
static int __init sm_via686a_init(void)
|
|
{
|
|
return pci_register_driver(&via686a_pci_driver);
|
|
}
|
|
|
|
static void __exit sm_via686a_exit(void)
|
|
{
|
|
pci_unregister_driver(&via686a_pci_driver);
|
|
if (s_bridge != NULL) {
|
|
i2c_del_driver(&via686a_driver);
|
|
pci_dev_put(s_bridge);
|
|
s_bridge = NULL;
|
|
}
|
|
}
|
|
|
|
MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
|
|
"Mark Studebaker <mdsxyz123@yahoo.com> "
|
|
"and Bob Dougherty <bobd@stanford.edu>");
|
|
MODULE_DESCRIPTION("VIA 686A Sensor device");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sm_via686a_init);
|
|
module_exit(sm_via686a_exit);
|