1506 lines
44 KiB
C
1506 lines
44 KiB
C
/*
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it87.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring.
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The IT8705F is an LPC-based Super I/O part that contains UARTs, a
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parallel port, an IR port, a MIDI port, a floppy controller, etc., in
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addition to an Environment Controller (Enhanced Hardware Monitor and
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Fan Controller)
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This driver supports only the Environment Controller in the IT8705F and
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similar parts. The other devices are supported by different drivers.
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Supports: IT8705F Super I/O chip w/LPC interface
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IT8712F Super I/O chip w/LPC interface
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IT8716F Super I/O chip w/LPC interface
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IT8718F Super I/O chip w/LPC interface
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IT8726F Super I/O chip w/LPC interface
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Sis950 A clone of the IT8705F
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Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com>
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Copyright (C) 2005-2006 Jean Delvare <khali@linux-fr.org>
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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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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/hwmon-vid.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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#include <asm/io.h>
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#define DRVNAME "it87"
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enum chips { it87, it8712, it8716, it8718 };
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static unsigned short force_id;
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module_param(force_id, ushort, 0);
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MODULE_PARM_DESC(force_id, "Override the detected device ID");
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static struct platform_device *pdev;
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#define REG 0x2e /* The register to read/write */
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#define DEV 0x07 /* Register: Logical device select */
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#define VAL 0x2f /* The value to read/write */
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#define PME 0x04 /* The device with the fan registers in it */
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#define GPIO 0x07 /* The device with the IT8718F VID value in it */
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#define DEVID 0x20 /* Register: Device ID */
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#define DEVREV 0x22 /* Register: Device Revision */
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static inline int
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superio_inb(int reg)
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{
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outb(reg, REG);
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return inb(VAL);
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}
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static int superio_inw(int reg)
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{
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int val;
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outb(reg++, REG);
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val = inb(VAL) << 8;
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outb(reg, REG);
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val |= inb(VAL);
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return val;
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}
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static inline void
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superio_select(int ldn)
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{
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outb(DEV, REG);
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outb(ldn, VAL);
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}
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static inline void
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superio_enter(void)
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{
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outb(0x87, REG);
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outb(0x01, REG);
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outb(0x55, REG);
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outb(0x55, REG);
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}
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static inline void
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superio_exit(void)
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{
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outb(0x02, REG);
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outb(0x02, VAL);
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}
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/* Logical device 4 registers */
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#define IT8712F_DEVID 0x8712
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#define IT8705F_DEVID 0x8705
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#define IT8716F_DEVID 0x8716
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#define IT8718F_DEVID 0x8718
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#define IT8726F_DEVID 0x8726
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#define IT87_ACT_REG 0x30
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#define IT87_BASE_REG 0x60
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/* Logical device 7 registers (IT8712F and later) */
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#define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
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#define IT87_SIO_VID_REG 0xfc /* VID value */
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/* Update battery voltage after every reading if true */
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static int update_vbat;
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/* Not all BIOSes properly configure the PWM registers */
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static int fix_pwm_polarity;
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/* Many IT87 constants specified below */
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/* Length of ISA address segment */
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#define IT87_EXTENT 8
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/* Length of ISA address segment for Environmental Controller */
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#define IT87_EC_EXTENT 2
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/* Offset of EC registers from ISA base address */
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#define IT87_EC_OFFSET 5
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/* Where are the ISA address/data registers relative to the EC base address */
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#define IT87_ADDR_REG_OFFSET 0
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#define IT87_DATA_REG_OFFSET 1
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/*----- The IT87 registers -----*/
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#define IT87_REG_CONFIG 0x00
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#define IT87_REG_ALARM1 0x01
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#define IT87_REG_ALARM2 0x02
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#define IT87_REG_ALARM3 0x03
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/* The IT8718F has the VID value in a different register, in Super-I/O
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configuration space. */
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#define IT87_REG_VID 0x0a
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/* Warning: register 0x0b is used for something completely different in
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new chips/revisions. I suspect only 16-bit tachometer mode will work
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for these. */
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#define IT87_REG_FAN_DIV 0x0b
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#define IT87_REG_FAN_16BIT 0x0c
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/* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
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static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
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static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
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static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
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static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
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#define IT87_REG_FAN_MAIN_CTRL 0x13
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#define IT87_REG_FAN_CTL 0x14
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#define IT87_REG_PWM(nr) (0x15 + (nr))
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#define IT87_REG_VIN(nr) (0x20 + (nr))
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#define IT87_REG_TEMP(nr) (0x29 + (nr))
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#define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
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#define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
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#define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
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#define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
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#define IT87_REG_VIN_ENABLE 0x50
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#define IT87_REG_TEMP_ENABLE 0x51
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#define IT87_REG_CHIPID 0x58
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#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
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#define IN_FROM_REG(val) ((val) * 16)
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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 255;
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rpm = SENSORS_LIMIT(rpm, 1, 1000000);
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return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
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254);
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}
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static inline u16 FAN16_TO_REG(long rpm)
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{
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if (rpm == 0)
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return 0xffff;
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return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
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}
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#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
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/* The divider is fixed to 2 in 16-bit mode */
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#define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
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#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
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((val)+500)/1000),-128,127))
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#define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
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#define PWM_TO_REG(val) ((val) >> 1)
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#define PWM_FROM_REG(val) (((val)&0x7f) << 1)
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static int DIV_TO_REG(int val)
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{
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int answer = 0;
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while (answer < 7 && (val >>= 1))
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answer++;
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return answer;
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}
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#define DIV_FROM_REG(val) (1 << (val))
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static const unsigned int pwm_freq[8] = {
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48000000 / 128,
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24000000 / 128,
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12000000 / 128,
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8000000 / 128,
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6000000 / 128,
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3000000 / 128,
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1500000 / 128,
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750000 / 128,
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};
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struct it87_sio_data {
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enum chips type;
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/* Values read from Super-I/O config space */
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u8 vid_value;
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};
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/* For each registered chip, we need to keep some data in memory.
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The structure is dynamically allocated. */
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struct it87_data {
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struct device *hwmon_dev;
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enum chips type;
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unsigned short addr;
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const char *name;
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struct mutex 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[9]; /* Register value */
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u8 in_max[8]; /* Register value */
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u8 in_min[8]; /* Register value */
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u8 has_fan; /* Bitfield, fans enabled */
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u16 fan[5]; /* Register values, possibly combined */
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u16 fan_min[5]; /* Register values, possibly combined */
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u8 temp[3]; /* Register value */
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u8 temp_high[3]; /* Register value */
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u8 temp_low[3]; /* Register value */
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u8 sensor; /* Register value */
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u8 fan_div[3]; /* Register encoding, shifted right */
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u8 vid; /* Register encoding, combined */
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u8 vrm;
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u32 alarms; /* Register encoding, combined */
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u8 fan_main_ctrl; /* Register value */
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u8 fan_ctl; /* Register value */
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u8 manual_pwm_ctl[3]; /* manual PWM value set by user */
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};
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static int it87_probe(struct platform_device *pdev);
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static int __devexit it87_remove(struct platform_device *pdev);
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static int it87_read_value(struct it87_data *data, u8 reg);
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static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
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static struct it87_data *it87_update_device(struct device *dev);
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static int it87_check_pwm(struct device *dev);
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static void it87_init_device(struct platform_device *pdev);
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static struct platform_driver it87_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = DRVNAME,
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},
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.probe = it87_probe,
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.remove = __devexit_p(it87_remove),
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};
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static ssize_t show_in(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
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}
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static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
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}
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static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
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}
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static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = dev_get_drvdata(dev);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_min[nr] = IN_TO_REG(val);
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it87_write_value(data, IT87_REG_VIN_MIN(nr),
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data->in_min[nr]);
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mutex_unlock(&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, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = dev_get_drvdata(dev);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_max[nr] = IN_TO_REG(val);
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it87_write_value(data, IT87_REG_VIN_MAX(nr),
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data->in_max[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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#define show_in_offset(offset) \
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static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
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show_in, NULL, offset);
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#define limit_in_offset(offset) \
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static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
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show_in_min, set_in_min, offset); \
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static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
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show_in_max, set_in_max, offset);
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show_in_offset(0);
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limit_in_offset(0);
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show_in_offset(1);
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limit_in_offset(1);
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show_in_offset(2);
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limit_in_offset(2);
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show_in_offset(3);
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limit_in_offset(3);
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show_in_offset(4);
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limit_in_offset(4);
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show_in_offset(5);
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limit_in_offset(5);
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show_in_offset(6);
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limit_in_offset(6);
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show_in_offset(7);
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limit_in_offset(7);
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show_in_offset(8);
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/* 3 temperatures */
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static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
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}
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static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
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}
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static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
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}
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static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = dev_get_drvdata(dev);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_high[nr] = TEMP_TO_REG(val);
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it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = dev_get_drvdata(dev);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_low[nr] = TEMP_TO_REG(val);
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it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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#define show_temp_offset(offset) \
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static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
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show_temp, NULL, offset - 1); \
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static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
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show_temp_max, set_temp_max, offset - 1); \
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static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
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show_temp_min, set_temp_min, offset - 1);
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show_temp_offset(1);
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show_temp_offset(2);
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show_temp_offset(3);
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static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
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int nr = sensor_attr->index;
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struct it87_data *data = it87_update_device(dev);
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u8 reg = data->sensor; /* In case the value is updated while we use it */
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if (reg & (1 << nr))
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return sprintf(buf, "3\n"); /* thermal diode */
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if (reg & (8 << nr))
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return sprintf(buf, "2\n"); /* thermistor */
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return sprintf(buf, "0\n"); /* disabled */
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}
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static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
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|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
data->sensor &= ~(1 << nr);
|
|
data->sensor &= ~(8 << nr);
|
|
/* 3 = thermal diode; 2 = thermistor; 0 = disabled */
|
|
if (val == 3)
|
|
data->sensor |= 1 << nr;
|
|
else if (val == 2)
|
|
data->sensor |= 8 << nr;
|
|
else if (val != 0) {
|
|
mutex_unlock(&data->update_lock);
|
|
return -EINVAL;
|
|
}
|
|
it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
#define show_sensor_offset(offset) \
|
|
static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
|
|
show_sensor, set_sensor, offset - 1);
|
|
|
|
show_sensor_offset(1);
|
|
show_sensor_offset(2);
|
|
show_sensor_offset(3);
|
|
|
|
/* 3 Fans */
|
|
static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = it87_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, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = it87_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, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
|
|
}
|
|
static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
|
|
}
|
|
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
|
|
}
|
|
static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct it87_data *data = it87_update_device(dev);
|
|
int index = (data->fan_ctl >> 4) & 0x07;
|
|
|
|
return sprintf(buf, "%u\n", pwm_freq[index]);
|
|
}
|
|
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
u8 reg;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
reg = it87_read_value(data, IT87_REG_FAN_DIV);
|
|
switch (nr) {
|
|
case 0: data->fan_div[nr] = reg & 0x07; break;
|
|
case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
|
|
case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
|
|
}
|
|
|
|
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
|
|
it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
unsigned long val = simple_strtoul(buf, NULL, 10);
|
|
int min;
|
|
u8 old;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
old = it87_read_value(data, IT87_REG_FAN_DIV);
|
|
|
|
/* Save fan min limit */
|
|
min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
|
|
|
|
switch (nr) {
|
|
case 0:
|
|
case 1:
|
|
data->fan_div[nr] = DIV_TO_REG(val);
|
|
break;
|
|
case 2:
|
|
if (val < 8)
|
|
data->fan_div[nr] = 1;
|
|
else
|
|
data->fan_div[nr] = 3;
|
|
}
|
|
val = old & 0x80;
|
|
val |= (data->fan_div[0] & 0x07);
|
|
val |= (data->fan_div[1] & 0x07) << 3;
|
|
if (data->fan_div[2] == 3)
|
|
val |= 0x1 << 6;
|
|
it87_write_value(data, IT87_REG_FAN_DIV, val);
|
|
|
|
/* Restore fan min limit */
|
|
data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
|
|
it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
static ssize_t set_pwm_enable(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (val == 0) {
|
|
int tmp;
|
|
/* make sure the fan is on when in on/off mode */
|
|
tmp = it87_read_value(data, IT87_REG_FAN_CTL);
|
|
it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
|
|
/* set on/off mode */
|
|
data->fan_main_ctrl &= ~(1 << nr);
|
|
it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
|
|
} else if (val == 1) {
|
|
/* set SmartGuardian mode */
|
|
data->fan_main_ctrl |= (1 << nr);
|
|
it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
|
|
/* set saved pwm value, clear FAN_CTLX PWM mode bit */
|
|
it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
|
|
} else {
|
|
mutex_unlock(&data->update_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
if (val < 0 || val > 255)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->manual_pwm_ctl[nr] = val;
|
|
if (data->fan_main_ctrl & (1 << nr))
|
|
it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
static ssize_t set_pwm_freq(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
unsigned long val = simple_strtoul(buf, NULL, 10);
|
|
int i;
|
|
|
|
/* Search for the nearest available frequency */
|
|
for (i = 0; i < 7; i++) {
|
|
if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
|
|
break;
|
|
}
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
|
|
data->fan_ctl |= i << 4;
|
|
it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
#define show_fan_offset(offset) \
|
|
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
|
|
show_fan, NULL, offset - 1); \
|
|
static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_fan_min, set_fan_min, offset - 1); \
|
|
static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
|
|
show_fan_div, set_fan_div, offset - 1);
|
|
|
|
show_fan_offset(1);
|
|
show_fan_offset(2);
|
|
show_fan_offset(3);
|
|
|
|
#define show_pwm_offset(offset) \
|
|
static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
|
|
show_pwm_enable, set_pwm_enable, offset - 1); \
|
|
static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
|
|
show_pwm, set_pwm, offset - 1); \
|
|
static DEVICE_ATTR(pwm##offset##_freq, \
|
|
(offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
|
|
show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
|
|
|
|
show_pwm_offset(1);
|
|
show_pwm_offset(2);
|
|
show_pwm_offset(3);
|
|
|
|
/* A different set of callbacks for 16-bit fans */
|
|
static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
|
|
}
|
|
|
|
static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
|
|
}
|
|
|
|
static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
int val = simple_strtol(buf, NULL, 10);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->fan_min[nr] = FAN16_TO_REG(val);
|
|
it87_write_value(data, IT87_REG_FAN_MIN[nr],
|
|
data->fan_min[nr] & 0xff);
|
|
it87_write_value(data, IT87_REG_FANX_MIN[nr],
|
|
data->fan_min[nr] >> 8);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
/* We want to use the same sysfs file names as 8-bit fans, but we need
|
|
different variable names, so we have to use SENSOR_ATTR instead of
|
|
SENSOR_DEVICE_ATTR. */
|
|
#define show_fan16_offset(offset) \
|
|
static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
|
|
= SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
|
|
show_fan16, NULL, offset - 1); \
|
|
static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
|
|
= SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_fan16_min, set_fan16_min, offset - 1)
|
|
|
|
show_fan16_offset(1);
|
|
show_fan16_offset(2);
|
|
show_fan16_offset(3);
|
|
show_fan16_offset(4);
|
|
show_fan16_offset(5);
|
|
|
|
/* Alarms */
|
|
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf, "%u\n", data->alarms);
|
|
}
|
|
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
|
|
|
|
static ssize_t
|
|
show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
return sprintf(buf, "%u\n", data->vrm);
|
|
}
|
|
static ssize_t
|
|
store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
u32 val;
|
|
|
|
val = simple_strtoul(buf, NULL, 10);
|
|
data->vrm = val;
|
|
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
|
|
|
|
static ssize_t
|
|
show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct it87_data *data = it87_update_device(dev);
|
|
return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
|
|
}
|
|
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
|
|
|
|
static ssize_t show_name(struct device *dev, struct device_attribute
|
|
*devattr, char *buf)
|
|
{
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
return sprintf(buf, "%s\n", data->name);
|
|
}
|
|
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
|
|
|
|
static struct attribute *it87_attributes[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in1_input.dev_attr.attr,
|
|
&sensor_dev_attr_in2_input.dev_attr.attr,
|
|
&sensor_dev_attr_in3_input.dev_attr.attr,
|
|
&sensor_dev_attr_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in6_input.dev_attr.attr,
|
|
&sensor_dev_attr_in7_input.dev_attr.attr,
|
|
&sensor_dev_attr_in8_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_min.dev_attr.attr,
|
|
&sensor_dev_attr_in1_min.dev_attr.attr,
|
|
&sensor_dev_attr_in2_min.dev_attr.attr,
|
|
&sensor_dev_attr_in3_min.dev_attr.attr,
|
|
&sensor_dev_attr_in4_min.dev_attr.attr,
|
|
&sensor_dev_attr_in5_min.dev_attr.attr,
|
|
&sensor_dev_attr_in6_min.dev_attr.attr,
|
|
&sensor_dev_attr_in7_min.dev_attr.attr,
|
|
&sensor_dev_attr_in0_max.dev_attr.attr,
|
|
&sensor_dev_attr_in1_max.dev_attr.attr,
|
|
&sensor_dev_attr_in2_max.dev_attr.attr,
|
|
&sensor_dev_attr_in3_max.dev_attr.attr,
|
|
&sensor_dev_attr_in4_max.dev_attr.attr,
|
|
&sensor_dev_attr_in5_max.dev_attr.attr,
|
|
&sensor_dev_attr_in6_max.dev_attr.attr,
|
|
&sensor_dev_attr_in7_max.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_type.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_type.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_type.dev_attr.attr,
|
|
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_name.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group it87_group = {
|
|
.attrs = it87_attributes,
|
|
};
|
|
|
|
static struct attribute *it87_attributes_opt[] = {
|
|
&sensor_dev_attr_fan1_input16.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min16.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input16.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min16.dev_attr.attr,
|
|
&sensor_dev_attr_fan3_input16.dev_attr.attr,
|
|
&sensor_dev_attr_fan3_min16.dev_attr.attr,
|
|
&sensor_dev_attr_fan4_input16.dev_attr.attr,
|
|
&sensor_dev_attr_fan4_min16.dev_attr.attr,
|
|
&sensor_dev_attr_fan5_input16.dev_attr.attr,
|
|
&sensor_dev_attr_fan5_min16.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan3_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan3_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan3_div.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
|
|
&sensor_dev_attr_pwm2_enable.dev_attr.attr,
|
|
&sensor_dev_attr_pwm3_enable.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1.dev_attr.attr,
|
|
&sensor_dev_attr_pwm2.dev_attr.attr,
|
|
&sensor_dev_attr_pwm3.dev_attr.attr,
|
|
|
|
&dev_attr_vrm.attr,
|
|
&dev_attr_cpu0_vid.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group it87_group_opt = {
|
|
.attrs = it87_attributes_opt,
|
|
};
|
|
|
|
/* SuperIO detection - will change isa_address if a chip is found */
|
|
static int __init it87_find(unsigned short *address,
|
|
struct it87_sio_data *sio_data)
|
|
{
|
|
int err = -ENODEV;
|
|
u16 chip_type;
|
|
|
|
superio_enter();
|
|
chip_type = force_id ? force_id : superio_inw(DEVID);
|
|
|
|
switch (chip_type) {
|
|
case IT8705F_DEVID:
|
|
sio_data->type = it87;
|
|
break;
|
|
case IT8712F_DEVID:
|
|
sio_data->type = it8712;
|
|
break;
|
|
case IT8716F_DEVID:
|
|
case IT8726F_DEVID:
|
|
sio_data->type = it8716;
|
|
break;
|
|
case IT8718F_DEVID:
|
|
sio_data->type = it8718;
|
|
break;
|
|
case 0xffff: /* No device at all */
|
|
goto exit;
|
|
default:
|
|
pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
|
|
chip_type);
|
|
goto exit;
|
|
}
|
|
|
|
superio_select(PME);
|
|
if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
|
|
pr_info("it87: Device not activated, skipping\n");
|
|
goto exit;
|
|
}
|
|
|
|
*address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
|
|
if (*address == 0) {
|
|
pr_info("it87: Base address not set, skipping\n");
|
|
goto exit;
|
|
}
|
|
|
|
err = 0;
|
|
pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
|
|
chip_type, *address, superio_inb(DEVREV) & 0x0f);
|
|
|
|
/* Read GPIO config and VID value from LDN 7 (GPIO) */
|
|
if (chip_type != IT8705F_DEVID) {
|
|
int reg;
|
|
|
|
superio_select(GPIO);
|
|
if (chip_type == it8718)
|
|
sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
|
|
|
|
reg = superio_inb(IT87_SIO_PINX2_REG);
|
|
if (reg & (1 << 0))
|
|
pr_info("it87: in3 is VCC (+5V)\n");
|
|
if (reg & (1 << 1))
|
|
pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
|
|
}
|
|
|
|
exit:
|
|
superio_exit();
|
|
return err;
|
|
}
|
|
|
|
static int __devinit it87_probe(struct platform_device *pdev)
|
|
{
|
|
struct it87_data *data;
|
|
struct resource *res;
|
|
struct device *dev = &pdev->dev;
|
|
struct it87_sio_data *sio_data = dev->platform_data;
|
|
int err = 0;
|
|
int enable_pwm_interface;
|
|
static const char *names[] = {
|
|
"it87",
|
|
"it8712",
|
|
"it8716",
|
|
"it8718",
|
|
};
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
|
|
dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
|
|
(unsigned long)res->start,
|
|
(unsigned long)(res->start + IT87_EC_EXTENT - 1));
|
|
err = -EBUSY;
|
|
goto ERROR0;
|
|
}
|
|
|
|
if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto ERROR1;
|
|
}
|
|
|
|
data->addr = res->start;
|
|
data->type = sio_data->type;
|
|
data->name = names[sio_data->type];
|
|
|
|
/* Now, we do the remaining detection. */
|
|
if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
|
|
|| it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
|
|
err = -ENODEV;
|
|
goto ERROR2;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Check PWM configuration */
|
|
enable_pwm_interface = it87_check_pwm(dev);
|
|
|
|
/* Initialize the IT87 chip */
|
|
it87_init_device(pdev);
|
|
|
|
/* Register sysfs hooks */
|
|
if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
|
|
goto ERROR2;
|
|
|
|
/* Do not create fan files for disabled fans */
|
|
if (data->type == it8716 || data->type == it8718) {
|
|
/* 16-bit tachometers */
|
|
if (data->has_fan & (1 << 0)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_input16.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_min16.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
if (data->has_fan & (1 << 1)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_input16.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_min16.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
if (data->has_fan & (1 << 2)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_input16.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_min16.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
if (data->has_fan & (1 << 3)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan4_input16.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan4_min16.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
if (data->has_fan & (1 << 4)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan5_input16.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan5_min16.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
} else {
|
|
/* 8-bit tachometers with clock divider */
|
|
if (data->has_fan & (1 << 0)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_input.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_min.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_div.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
if (data->has_fan & (1 << 1)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_input.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_min.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_div.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
if (data->has_fan & (1 << 2)) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_input.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_min.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_div.dev_attr)))
|
|
goto ERROR4;
|
|
}
|
|
}
|
|
|
|
if (enable_pwm_interface) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm1_enable.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm2_enable.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm3_enable.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm1.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm2.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm3.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&dev_attr_pwm1_freq))
|
|
|| (err = device_create_file(dev,
|
|
&dev_attr_pwm2_freq))
|
|
|| (err = device_create_file(dev,
|
|
&dev_attr_pwm3_freq)))
|
|
goto ERROR4;
|
|
}
|
|
|
|
if (data->type == it8712 || data->type == it8716
|
|
|| data->type == it8718) {
|
|
data->vrm = vid_which_vrm();
|
|
/* VID reading from Super-I/O config space if available */
|
|
data->vid = sio_data->vid_value;
|
|
if ((err = device_create_file(dev,
|
|
&dev_attr_vrm))
|
|
|| (err = device_create_file(dev,
|
|
&dev_attr_cpu0_vid)))
|
|
goto ERROR4;
|
|
}
|
|
|
|
data->hwmon_dev = hwmon_device_register(dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto ERROR4;
|
|
}
|
|
|
|
return 0;
|
|
|
|
ERROR4:
|
|
sysfs_remove_group(&dev->kobj, &it87_group);
|
|
sysfs_remove_group(&dev->kobj, &it87_group_opt);
|
|
ERROR2:
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(data);
|
|
ERROR1:
|
|
release_region(res->start, IT87_EC_EXTENT);
|
|
ERROR0:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit it87_remove(struct platform_device *pdev)
|
|
{
|
|
struct it87_data *data = platform_get_drvdata(pdev);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&pdev->dev.kobj, &it87_group);
|
|
sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt);
|
|
|
|
release_region(data->addr, IT87_EC_EXTENT);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Must be called with data->update_lock held, except during initialization.
|
|
We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
|
|
would slow down the IT87 access and should not be necessary. */
|
|
static int it87_read_value(struct it87_data *data, u8 reg)
|
|
{
|
|
outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
|
|
return inb_p(data->addr + IT87_DATA_REG_OFFSET);
|
|
}
|
|
|
|
/* Must be called with data->update_lock held, except during initialization.
|
|
We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
|
|
would slow down the IT87 access and should not be necessary. */
|
|
static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
|
|
{
|
|
outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
|
|
outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
|
|
}
|
|
|
|
/* Return 1 if and only if the PWM interface is safe to use */
|
|
static int __devinit it87_check_pwm(struct device *dev)
|
|
{
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
/* Some BIOSes fail to correctly configure the IT87 fans. All fans off
|
|
* and polarity set to active low is sign that this is the case so we
|
|
* disable pwm control to protect the user. */
|
|
int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
|
|
if ((tmp & 0x87) == 0) {
|
|
if (fix_pwm_polarity) {
|
|
/* The user asks us to attempt a chip reconfiguration.
|
|
* This means switching to active high polarity and
|
|
* inverting all fan speed values. */
|
|
int i;
|
|
u8 pwm[3];
|
|
|
|
for (i = 0; i < 3; i++)
|
|
pwm[i] = it87_read_value(data,
|
|
IT87_REG_PWM(i));
|
|
|
|
/* If any fan is in automatic pwm mode, the polarity
|
|
* might be correct, as suspicious as it seems, so we
|
|
* better don't change anything (but still disable the
|
|
* PWM interface). */
|
|
if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
|
|
dev_info(dev, "Reconfiguring PWM to "
|
|
"active high polarity\n");
|
|
it87_write_value(data, IT87_REG_FAN_CTL,
|
|
tmp | 0x87);
|
|
for (i = 0; i < 3; i++)
|
|
it87_write_value(data,
|
|
IT87_REG_PWM(i),
|
|
0x7f & ~pwm[i]);
|
|
return 1;
|
|
}
|
|
|
|
dev_info(dev, "PWM configuration is "
|
|
"too broken to be fixed\n");
|
|
}
|
|
|
|
dev_info(dev, "Detected broken BIOS "
|
|
"defaults, disabling PWM interface\n");
|
|
return 0;
|
|
} else if (fix_pwm_polarity) {
|
|
dev_info(dev, "PWM configuration looks "
|
|
"sane, won't touch\n");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Called when we have found a new IT87. */
|
|
static void __devinit it87_init_device(struct platform_device *pdev)
|
|
{
|
|
struct it87_data *data = platform_get_drvdata(pdev);
|
|
int tmp, i;
|
|
|
|
/* initialize to sane defaults:
|
|
* - if the chip is in manual pwm mode, this will be overwritten with
|
|
* the actual settings on the chip (so in this case, initialization
|
|
* is not needed)
|
|
* - if in automatic or on/off mode, we could switch to manual mode,
|
|
* read the registers and set manual_pwm_ctl accordingly, but currently
|
|
* this is not implemented, so we initialize to something sane */
|
|
for (i = 0; i < 3; i++) {
|
|
data->manual_pwm_ctl[i] = 0xff;
|
|
}
|
|
|
|
/* Some chips seem to have default value 0xff for all limit
|
|
* registers. For low voltage limits it makes no sense and triggers
|
|
* alarms, so change to 0 instead. For high temperature limits, it
|
|
* means -1 degree C, which surprisingly doesn't trigger an alarm,
|
|
* but is still confusing, so change to 127 degrees C. */
|
|
for (i = 0; i < 8; i++) {
|
|
tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
|
|
if (tmp == 0xff)
|
|
it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
|
|
if (tmp == 0xff)
|
|
it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
|
|
}
|
|
|
|
/* Check if temperature channnels are reset manually or by some reason */
|
|
tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
|
|
if ((tmp & 0x3f) == 0) {
|
|
/* Temp1,Temp3=thermistor; Temp2=thermal diode */
|
|
tmp = (tmp & 0xc0) | 0x2a;
|
|
it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
|
|
}
|
|
data->sensor = tmp;
|
|
|
|
/* Check if voltage monitors are reset manually or by some reason */
|
|
tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
|
|
if ((tmp & 0xff) == 0) {
|
|
/* Enable all voltage monitors */
|
|
it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
|
|
}
|
|
|
|
/* Check if tachometers are reset manually or by some reason */
|
|
data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
|
|
if ((data->fan_main_ctrl & 0x70) == 0) {
|
|
/* Enable all fan tachometers */
|
|
data->fan_main_ctrl |= 0x70;
|
|
it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
|
|
}
|
|
data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
|
|
|
|
/* Set tachometers to 16-bit mode if needed */
|
|
if (data->type == it8716 || data->type == it8718) {
|
|
tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
|
|
if (~tmp & 0x07 & data->has_fan) {
|
|
dev_dbg(&pdev->dev,
|
|
"Setting fan1-3 to 16-bit mode\n");
|
|
it87_write_value(data, IT87_REG_FAN_16BIT,
|
|
tmp | 0x07);
|
|
}
|
|
if (tmp & (1 << 4))
|
|
data->has_fan |= (1 << 3); /* fan4 enabled */
|
|
if (tmp & (1 << 5))
|
|
data->has_fan |= (1 << 4); /* fan5 enabled */
|
|
}
|
|
|
|
/* Set current fan mode registers and the default settings for the
|
|
* other mode registers */
|
|
for (i = 0; i < 3; i++) {
|
|
if (data->fan_main_ctrl & (1 << i)) {
|
|
/* pwm mode */
|
|
tmp = it87_read_value(data, IT87_REG_PWM(i));
|
|
if (tmp & 0x80) {
|
|
/* automatic pwm - not yet implemented, but
|
|
* leave the settings made by the BIOS alone
|
|
* until a change is requested via the sysfs
|
|
* interface */
|
|
} else {
|
|
/* manual pwm */
|
|
data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Start monitoring */
|
|
it87_write_value(data, IT87_REG_CONFIG,
|
|
(it87_read_value(data, IT87_REG_CONFIG) & 0x36)
|
|
| (update_vbat ? 0x41 : 0x01));
|
|
}
|
|
|
|
static struct it87_data *it87_update_device(struct device *dev)
|
|
{
|
|
struct it87_data *data = dev_get_drvdata(dev);
|
|
int i;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|
|
|| !data->valid) {
|
|
|
|
if (update_vbat) {
|
|
/* Cleared after each update, so reenable. Value
|
|
returned by this read will be previous value */
|
|
it87_write_value(data, IT87_REG_CONFIG,
|
|
it87_read_value(data, IT87_REG_CONFIG) | 0x40);
|
|
}
|
|
for (i = 0; i <= 7; i++) {
|
|
data->in[i] =
|
|
it87_read_value(data, IT87_REG_VIN(i));
|
|
data->in_min[i] =
|
|
it87_read_value(data, IT87_REG_VIN_MIN(i));
|
|
data->in_max[i] =
|
|
it87_read_value(data, IT87_REG_VIN_MAX(i));
|
|
}
|
|
/* in8 (battery) has no limit registers */
|
|
data->in[8] =
|
|
it87_read_value(data, IT87_REG_VIN(8));
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
/* Skip disabled fans */
|
|
if (!(data->has_fan & (1 << i)))
|
|
continue;
|
|
|
|
data->fan_min[i] =
|
|
it87_read_value(data, IT87_REG_FAN_MIN[i]);
|
|
data->fan[i] = it87_read_value(data,
|
|
IT87_REG_FAN[i]);
|
|
/* Add high byte if in 16-bit mode */
|
|
if (data->type == it8716 || data->type == it8718) {
|
|
data->fan[i] |= it87_read_value(data,
|
|
IT87_REG_FANX[i]) << 8;
|
|
data->fan_min[i] |= it87_read_value(data,
|
|
IT87_REG_FANX_MIN[i]) << 8;
|
|
}
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
data->temp[i] =
|
|
it87_read_value(data, IT87_REG_TEMP(i));
|
|
data->temp_high[i] =
|
|
it87_read_value(data, IT87_REG_TEMP_HIGH(i));
|
|
data->temp_low[i] =
|
|
it87_read_value(data, IT87_REG_TEMP_LOW(i));
|
|
}
|
|
|
|
/* Newer chips don't have clock dividers */
|
|
if ((data->has_fan & 0x07) && data->type != it8716
|
|
&& data->type != it8718) {
|
|
i = it87_read_value(data, IT87_REG_FAN_DIV);
|
|
data->fan_div[0] = i & 0x07;
|
|
data->fan_div[1] = (i >> 3) & 0x07;
|
|
data->fan_div[2] = (i & 0x40) ? 3 : 1;
|
|
}
|
|
|
|
data->alarms =
|
|
it87_read_value(data, IT87_REG_ALARM1) |
|
|
(it87_read_value(data, IT87_REG_ALARM2) << 8) |
|
|
(it87_read_value(data, IT87_REG_ALARM3) << 16);
|
|
data->fan_main_ctrl = it87_read_value(data,
|
|
IT87_REG_FAN_MAIN_CTRL);
|
|
data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
|
|
|
|
data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
|
|
/* The 8705 does not have VID capability */
|
|
if (data->type == it8712 || data->type == it8716) {
|
|
data->vid = it87_read_value(data, IT87_REG_VID);
|
|
/* The older IT8712F revisions had only 5 VID pins,
|
|
but we assume it is always safe to read 6 bits. */
|
|
data->vid &= 0x3f;
|
|
}
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
static int __init it87_device_add(unsigned short address,
|
|
const struct it87_sio_data *sio_data)
|
|
{
|
|
struct resource res = {
|
|
.start = address + IT87_EC_OFFSET,
|
|
.end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
|
|
.name = DRVNAME,
|
|
.flags = IORESOURCE_IO,
|
|
};
|
|
int err;
|
|
|
|
pdev = platform_device_alloc(DRVNAME, address);
|
|
if (!pdev) {
|
|
err = -ENOMEM;
|
|
printk(KERN_ERR DRVNAME ": Device allocation failed\n");
|
|
goto exit;
|
|
}
|
|
|
|
err = platform_device_add_resources(pdev, &res, 1);
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Device resource addition failed "
|
|
"(%d)\n", err);
|
|
goto exit_device_put;
|
|
}
|
|
|
|
err = platform_device_add_data(pdev, sio_data,
|
|
sizeof(struct it87_sio_data));
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
|
|
goto exit_device_put;
|
|
}
|
|
|
|
err = platform_device_add(pdev);
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
|
|
err);
|
|
goto exit_device_put;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_device_put:
|
|
platform_device_put(pdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __init sm_it87_init(void)
|
|
{
|
|
int err;
|
|
unsigned short isa_address=0;
|
|
struct it87_sio_data sio_data;
|
|
|
|
err = it87_find(&isa_address, &sio_data);
|
|
if (err)
|
|
return err;
|
|
err = platform_driver_register(&it87_driver);
|
|
if (err)
|
|
return err;
|
|
|
|
err = it87_device_add(isa_address, &sio_data);
|
|
if (err){
|
|
platform_driver_unregister(&it87_driver);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit sm_it87_exit(void)
|
|
{
|
|
platform_device_unregister(pdev);
|
|
platform_driver_unregister(&it87_driver);
|
|
}
|
|
|
|
|
|
MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>, "
|
|
"Jean Delvare <khali@linux-fr.org>");
|
|
MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver");
|
|
module_param(update_vbat, bool, 0);
|
|
MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
|
|
module_param(fix_pwm_polarity, bool, 0);
|
|
MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sm_it87_init);
|
|
module_exit(sm_it87_exit);
|