mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 15:36:56 +07:00
7c0f6ba682
This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)
to do the replacement at the end of the merge window.
Requested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
547 lines
13 KiB
C
547 lines
13 KiB
C
/* toshiba.c -- Linux driver for accessing the SMM on Toshiba laptops
|
|
*
|
|
* Copyright (c) 1996-2001 Jonathan A. Buzzard (jonathan@buzzard.org.uk)
|
|
*
|
|
* Valuable assistance and patches from:
|
|
* Tom May <tom@you-bastards.com>
|
|
* Rob Napier <rnapier@employees.org>
|
|
*
|
|
* Fn status port numbers for machine ID's courtesy of
|
|
* 0xfc02: Scott Eisert <scott.e@sky-eye.com>
|
|
* 0xfc04: Steve VanDevender <stevev@efn.org>
|
|
* 0xfc08: Garth Berry <garth@itsbruce.net>
|
|
* 0xfc0a: Egbert Eich <eich@xfree86.org>
|
|
* 0xfc10: Andrew Lofthouse <Andrew.Lofthouse@robins.af.mil>
|
|
* 0xfc11: Spencer Olson <solson@novell.com>
|
|
* 0xfc13: Claudius Frankewitz <kryp@gmx.de>
|
|
* 0xfc15: Tom May <tom@you-bastards.com>
|
|
* 0xfc17: Dave Konrad <konrad@xenia.it>
|
|
* 0xfc1a: George Betzos <betzos@engr.colostate.edu>
|
|
* 0xfc1b: Munemasa Wada <munemasa@jnovel.co.jp>
|
|
* 0xfc1d: Arthur Liu <armie@slap.mine.nu>
|
|
* 0xfc5a: Jacques L'helgoualc'h <lhh@free.fr>
|
|
* 0xfcd1: Mr. Dave Konrad <konrad@xenia.it>
|
|
*
|
|
* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
|
|
*
|
|
* This code is covered by the GNU GPL and you are free to make any
|
|
* changes you wish to it under the terms of the license. However the
|
|
* code has the potential to render your computer and/or someone else's
|
|
* unusable. Please proceed with care when modifying the code.
|
|
*
|
|
* Note: Unfortunately the laptop hardware can close the System Configuration
|
|
* Interface on it's own accord. It is therefore necessary for *all*
|
|
* programs using this driver to be aware that *any* SCI call can fail at
|
|
* *any* time. It is up to any program to be aware of this eventuality
|
|
* and take appropriate steps.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2, or (at your option) any
|
|
* later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* The information used to write this driver has been obtained by reverse
|
|
* engineering the software supplied by Toshiba for their portable computers in
|
|
* strict accordance with the European Council Directive 92/250/EEC on the legal
|
|
* protection of computer programs, and it's implementation into English Law by
|
|
* the Copyright (Computer Programs) Regulations 1992 (S.I. 1992 No.3233).
|
|
*
|
|
*/
|
|
|
|
#define TOSH_VERSION "1.11 26/9/2001"
|
|
#define TOSH_DEBUG 0
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/ioport.h>
|
|
#include <asm/io.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/init.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/toshiba.h>
|
|
|
|
#define TOSH_MINOR_DEV 181
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Jonathan Buzzard <jonathan@buzzard.org.uk>");
|
|
MODULE_DESCRIPTION("Toshiba laptop SMM driver");
|
|
MODULE_SUPPORTED_DEVICE("toshiba");
|
|
|
|
static DEFINE_MUTEX(tosh_mutex);
|
|
static int tosh_fn;
|
|
module_param_named(fn, tosh_fn, int, 0);
|
|
MODULE_PARM_DESC(fn, "User specified Fn key detection port");
|
|
|
|
static int tosh_id;
|
|
static int tosh_bios;
|
|
static int tosh_date;
|
|
static int tosh_sci;
|
|
static int tosh_fan;
|
|
|
|
static long tosh_ioctl(struct file *, unsigned int,
|
|
unsigned long);
|
|
|
|
|
|
static const struct file_operations tosh_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = tosh_ioctl,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static struct miscdevice tosh_device = {
|
|
TOSH_MINOR_DEV,
|
|
"toshiba",
|
|
&tosh_fops
|
|
};
|
|
|
|
/*
|
|
* Read the Fn key status
|
|
*/
|
|
#ifdef CONFIG_PROC_FS
|
|
static int tosh_fn_status(void)
|
|
{
|
|
unsigned char scan;
|
|
unsigned long flags;
|
|
|
|
if (tosh_fn!=0) {
|
|
scan = inb(tosh_fn);
|
|
} else {
|
|
local_irq_save(flags);
|
|
outb(0x8e, 0xe4);
|
|
scan = inb(0xe5);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
return (int) scan;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* For the Portage 610CT and the Tecra 700CS/700CDT emulate the HCI fan function
|
|
*/
|
|
static int tosh_emulate_fan(SMMRegisters *regs)
|
|
{
|
|
unsigned long eax,ecx,flags;
|
|
unsigned char al;
|
|
|
|
eax = regs->eax & 0xff00;
|
|
ecx = regs->ecx & 0xffff;
|
|
|
|
/* Portage 610CT */
|
|
|
|
if (tosh_id==0xfccb) {
|
|
if (eax==0xfe00) {
|
|
/* fan status */
|
|
local_irq_save(flags);
|
|
outb(0xbe, 0xe4);
|
|
al = inb(0xe5);
|
|
local_irq_restore(flags);
|
|
regs->eax = 0x00;
|
|
regs->ecx = (unsigned int) (al & 0x01);
|
|
}
|
|
if ((eax==0xff00) && (ecx==0x0000)) {
|
|
/* fan off */
|
|
local_irq_save(flags);
|
|
outb(0xbe, 0xe4);
|
|
al = inb(0xe5);
|
|
outb(0xbe, 0xe4);
|
|
outb (al | 0x01, 0xe5);
|
|
local_irq_restore(flags);
|
|
regs->eax = 0x00;
|
|
regs->ecx = 0x00;
|
|
}
|
|
if ((eax==0xff00) && (ecx==0x0001)) {
|
|
/* fan on */
|
|
local_irq_save(flags);
|
|
outb(0xbe, 0xe4);
|
|
al = inb(0xe5);
|
|
outb(0xbe, 0xe4);
|
|
outb(al & 0xfe, 0xe5);
|
|
local_irq_restore(flags);
|
|
regs->eax = 0x00;
|
|
regs->ecx = 0x01;
|
|
}
|
|
}
|
|
|
|
/* Tecra 700CS/CDT */
|
|
|
|
if (tosh_id==0xfccc) {
|
|
if (eax==0xfe00) {
|
|
/* fan status */
|
|
local_irq_save(flags);
|
|
outb(0xe0, 0xe4);
|
|
al = inb(0xe5);
|
|
local_irq_restore(flags);
|
|
regs->eax = 0x00;
|
|
regs->ecx = al & 0x01;
|
|
}
|
|
if ((eax==0xff00) && (ecx==0x0000)) {
|
|
/* fan off */
|
|
local_irq_save(flags);
|
|
outb(0xe0, 0xe4);
|
|
al = inb(0xe5);
|
|
outw(0xe0 | ((al & 0xfe) << 8), 0xe4);
|
|
local_irq_restore(flags);
|
|
regs->eax = 0x00;
|
|
regs->ecx = 0x00;
|
|
}
|
|
if ((eax==0xff00) && (ecx==0x0001)) {
|
|
/* fan on */
|
|
local_irq_save(flags);
|
|
outb(0xe0, 0xe4);
|
|
al = inb(0xe5);
|
|
outw(0xe0 | ((al | 0x01) << 8), 0xe4);
|
|
local_irq_restore(flags);
|
|
regs->eax = 0x00;
|
|
regs->ecx = 0x01;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Put the laptop into System Management Mode
|
|
*/
|
|
int tosh_smm(SMMRegisters *regs)
|
|
{
|
|
int eax;
|
|
|
|
asm ("# load the values into the registers\n\t" \
|
|
"pushl %%eax\n\t" \
|
|
"movl 0(%%eax),%%edx\n\t" \
|
|
"push %%edx\n\t" \
|
|
"movl 4(%%eax),%%ebx\n\t" \
|
|
"movl 8(%%eax),%%ecx\n\t" \
|
|
"movl 12(%%eax),%%edx\n\t" \
|
|
"movl 16(%%eax),%%esi\n\t" \
|
|
"movl 20(%%eax),%%edi\n\t" \
|
|
"popl %%eax\n\t" \
|
|
"# call the System Management mode\n\t" \
|
|
"inb $0xb2,%%al\n\t"
|
|
"# fill out the memory with the values in the registers\n\t" \
|
|
"xchgl %%eax,(%%esp)\n\t"
|
|
"movl %%ebx,4(%%eax)\n\t" \
|
|
"movl %%ecx,8(%%eax)\n\t" \
|
|
"movl %%edx,12(%%eax)\n\t" \
|
|
"movl %%esi,16(%%eax)\n\t" \
|
|
"movl %%edi,20(%%eax)\n\t" \
|
|
"popl %%edx\n\t" \
|
|
"movl %%edx,0(%%eax)\n\t" \
|
|
"# setup the return value to the carry flag\n\t" \
|
|
"lahf\n\t" \
|
|
"shrl $8,%%eax\n\t" \
|
|
"andl $1,%%eax\n" \
|
|
: "=a" (eax)
|
|
: "a" (regs)
|
|
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
|
|
|
|
return eax;
|
|
}
|
|
EXPORT_SYMBOL(tosh_smm);
|
|
|
|
|
|
static long tosh_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
SMMRegisters regs;
|
|
SMMRegisters __user *argp = (SMMRegisters __user *)arg;
|
|
unsigned short ax,bx;
|
|
int err;
|
|
|
|
if (!argp)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(®s, argp, sizeof(SMMRegisters)))
|
|
return -EFAULT;
|
|
|
|
switch (cmd) {
|
|
case TOSH_SMM:
|
|
ax = regs.eax & 0xff00;
|
|
bx = regs.ebx & 0xffff;
|
|
/* block HCI calls to read/write memory & PCI devices */
|
|
if (((ax==0xff00) || (ax==0xfe00)) && (bx>0x0069))
|
|
return -EINVAL;
|
|
|
|
/* do we need to emulate the fan ? */
|
|
mutex_lock(&tosh_mutex);
|
|
if (tosh_fan==1) {
|
|
if (((ax==0xf300) || (ax==0xf400)) && (bx==0x0004)) {
|
|
err = tosh_emulate_fan(®s);
|
|
mutex_unlock(&tosh_mutex);
|
|
break;
|
|
}
|
|
}
|
|
err = tosh_smm(®s);
|
|
mutex_unlock(&tosh_mutex);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (copy_to_user(argp, ®s, sizeof(SMMRegisters)))
|
|
return -EFAULT;
|
|
|
|
return (err==0) ? 0:-EINVAL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Print the information for /proc/toshiba
|
|
*/
|
|
#ifdef CONFIG_PROC_FS
|
|
static int proc_toshiba_show(struct seq_file *m, void *v)
|
|
{
|
|
int key;
|
|
|
|
key = tosh_fn_status();
|
|
|
|
/* Arguments
|
|
0) Linux driver version (this will change if format changes)
|
|
1) Machine ID
|
|
2) SCI version
|
|
3) BIOS version (major, minor)
|
|
4) BIOS date (in SCI date format)
|
|
5) Fn Key status
|
|
*/
|
|
seq_printf(m, "1.1 0x%04x %d.%d %d.%d 0x%04x 0x%02x\n",
|
|
tosh_id,
|
|
(tosh_sci & 0xff00)>>8,
|
|
tosh_sci & 0xff,
|
|
(tosh_bios & 0xff00)>>8,
|
|
tosh_bios & 0xff,
|
|
tosh_date,
|
|
key);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_toshiba_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, proc_toshiba_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations proc_toshiba_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = proc_toshiba_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Determine which port to use for the Fn key status
|
|
*/
|
|
static void tosh_set_fn_port(void)
|
|
{
|
|
switch (tosh_id) {
|
|
case 0xfc02: case 0xfc04: case 0xfc09: case 0xfc0a: case 0xfc10:
|
|
case 0xfc11: case 0xfc13: case 0xfc15: case 0xfc1a: case 0xfc1b:
|
|
case 0xfc5a:
|
|
tosh_fn = 0x62;
|
|
break;
|
|
case 0xfc08: case 0xfc17: case 0xfc1d: case 0xfcd1: case 0xfce0:
|
|
case 0xfce2:
|
|
tosh_fn = 0x68;
|
|
break;
|
|
default:
|
|
tosh_fn = 0x00;
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Get the machine identification number of the current model
|
|
*/
|
|
static int tosh_get_machine_id(void __iomem *bios)
|
|
{
|
|
int id;
|
|
SMMRegisters regs;
|
|
unsigned short bx,cx;
|
|
unsigned long address;
|
|
|
|
id = (0x100*(int) readb(bios+0xfffe))+((int) readb(bios+0xfffa));
|
|
|
|
/* do we have a SCTTable machine identication number on our hands */
|
|
|
|
if (id==0xfc2f) {
|
|
|
|
/* start by getting a pointer into the BIOS */
|
|
|
|
regs.eax = 0xc000;
|
|
regs.ebx = 0x0000;
|
|
regs.ecx = 0x0000;
|
|
tosh_smm(®s);
|
|
bx = (unsigned short) (regs.ebx & 0xffff);
|
|
|
|
/* At this point in the Toshiba routines under MS Windows
|
|
the bx register holds 0xe6f5. However my code is producing
|
|
a different value! For the time being I will just fudge the
|
|
value. This has been verified on a Satellite Pro 430CDT,
|
|
Tecra 750CDT, Tecra 780DVD and Satellite 310CDT. */
|
|
#if TOSH_DEBUG
|
|
printk("toshiba: debugging ID ebx=0x%04x\n", regs.ebx);
|
|
#endif
|
|
bx = 0xe6f5;
|
|
|
|
/* now twiddle with our pointer a bit */
|
|
|
|
address = bx;
|
|
cx = readw(bios + address);
|
|
address = 9+bx+cx;
|
|
cx = readw(bios + address);
|
|
address = 0xa+cx;
|
|
cx = readw(bios + address);
|
|
|
|
/* now construct our machine identification number */
|
|
|
|
id = ((cx & 0xff)<<8)+((cx & 0xff00)>>8);
|
|
}
|
|
|
|
return id;
|
|
}
|
|
|
|
|
|
/*
|
|
* Probe for the presence of a Toshiba laptop
|
|
*
|
|
* returns and non-zero if unable to detect the presence of a Toshiba
|
|
* laptop, otherwise zero and determines the Machine ID, BIOS version and
|
|
* date, and SCI version.
|
|
*/
|
|
static int tosh_probe(void)
|
|
{
|
|
int i,major,minor,day,year,month,flag;
|
|
unsigned char signature[7] = { 0x54,0x4f,0x53,0x48,0x49,0x42,0x41 };
|
|
SMMRegisters regs;
|
|
void __iomem *bios = ioremap(0xf0000, 0x10000);
|
|
|
|
if (!bios)
|
|
return -ENOMEM;
|
|
|
|
/* extra sanity check for the string "TOSHIBA" in the BIOS because
|
|
some machines that are not Toshiba's pass the next test */
|
|
|
|
for (i=0;i<7;i++) {
|
|
if (readb(bios+0xe010+i)!=signature[i]) {
|
|
printk("toshiba: not a supported Toshiba laptop\n");
|
|
iounmap(bios);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
/* call the Toshiba SCI support check routine */
|
|
|
|
regs.eax = 0xf0f0;
|
|
regs.ebx = 0x0000;
|
|
regs.ecx = 0x0000;
|
|
flag = tosh_smm(®s);
|
|
|
|
/* if this is not a Toshiba laptop carry flag is set and ah=0x86 */
|
|
|
|
if ((flag==1) || ((regs.eax & 0xff00)==0x8600)) {
|
|
printk("toshiba: not a supported Toshiba laptop\n");
|
|
iounmap(bios);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* if we get this far then we are running on a Toshiba (probably)! */
|
|
|
|
tosh_sci = regs.edx & 0xffff;
|
|
|
|
/* next get the machine ID of the current laptop */
|
|
|
|
tosh_id = tosh_get_machine_id(bios);
|
|
|
|
/* get the BIOS version */
|
|
|
|
major = readb(bios+0xe009)-'0';
|
|
minor = ((readb(bios+0xe00b)-'0')*10)+(readb(bios+0xe00c)-'0');
|
|
tosh_bios = (major*0x100)+minor;
|
|
|
|
/* get the BIOS date */
|
|
|
|
day = ((readb(bios+0xfff5)-'0')*10)+(readb(bios+0xfff6)-'0');
|
|
month = ((readb(bios+0xfff8)-'0')*10)+(readb(bios+0xfff9)-'0');
|
|
year = ((readb(bios+0xfffb)-'0')*10)+(readb(bios+0xfffc)-'0');
|
|
tosh_date = (((year-90) & 0x1f)<<10) | ((month & 0xf)<<6)
|
|
| ((day & 0x1f)<<1);
|
|
|
|
|
|
/* in theory we should check the ports we are going to use for the
|
|
fn key detection (and the fan on the Portage 610/Tecra700), and
|
|
then request them to stop other drivers using them. However as
|
|
the keyboard driver grabs 0x60-0x6f and the pic driver grabs
|
|
0xa0-0xbf we can't. We just have to live dangerously and use the
|
|
ports anyway, oh boy! */
|
|
|
|
/* do we need to emulate the fan? */
|
|
|
|
if ((tosh_id==0xfccb) || (tosh_id==0xfccc))
|
|
tosh_fan = 1;
|
|
|
|
iounmap(bios);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init toshiba_init(void)
|
|
{
|
|
int retval;
|
|
/* are we running on a Toshiba laptop */
|
|
|
|
if (tosh_probe())
|
|
return -ENODEV;
|
|
|
|
printk(KERN_INFO "Toshiba System Management Mode driver v" TOSH_VERSION "\n");
|
|
|
|
/* set the port to use for Fn status if not specified as a parameter */
|
|
if (tosh_fn==0x00)
|
|
tosh_set_fn_port();
|
|
|
|
/* register the device file */
|
|
retval = misc_register(&tosh_device);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
{
|
|
struct proc_dir_entry *pde;
|
|
|
|
pde = proc_create("toshiba", 0, NULL, &proc_toshiba_fops);
|
|
if (!pde) {
|
|
misc_deregister(&tosh_device);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit toshiba_exit(void)
|
|
{
|
|
remove_proc_entry("toshiba", NULL);
|
|
misc_deregister(&tosh_device);
|
|
}
|
|
|
|
module_init(toshiba_init);
|
|
module_exit(toshiba_exit);
|
|
|