mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 01:36:48 +07:00
930e19248e
On suspend/resume cycle, selftest is executed to reset i8042 controller. But when this is done in Asus devices, subsequent calls to detect/init functions to elantech driver fails. Skipping selftest fixes this problem. An easier step to reproduce this problem is adding i8042.reset=1 as a kernel parameter. On Asus laptops, it'll make the system to start with the touchpad already stuck, since psmouse_probe forcibly calls the selftest function. This patch was inspired by John Hiesey's change[1], but, since this problem affects a lot of models of Asus, let's avoid running selftests on them. All models affected by this problem: A455LD K401LB K501LB K501LX R409L V502LX X302LA X450LCP X450LD X455LAB X455LDB X455LF Z450LA [1]: https://marc.info/?l=linux-input&m=144312209020616&w=2 Fixes: "ETPS/2 Elantech Touchpad dies after resume from suspend" (https://bugzilla.kernel.org/show_bug.cgi?id=107971) Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
#ifndef _I8042_IO_H
|
|
#define _I8042_IO_H
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
|
|
/*
|
|
* Names.
|
|
*/
|
|
|
|
#define I8042_KBD_PHYS_DESC "isa0060/serio0"
|
|
#define I8042_AUX_PHYS_DESC "isa0060/serio1"
|
|
#define I8042_MUX_PHYS_DESC "isa0060/serio%d"
|
|
|
|
/*
|
|
* IRQs.
|
|
*/
|
|
|
|
#ifdef __alpha__
|
|
# define I8042_KBD_IRQ 1
|
|
# define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */
|
|
#elif defined(__arm__)
|
|
/* defined in include/asm-arm/arch-xxx/irqs.h */
|
|
#include <asm/irq.h>
|
|
#elif defined(CONFIG_SH_CAYMAN)
|
|
#include <asm/irq.h>
|
|
#elif defined(CONFIG_PPC)
|
|
extern int of_i8042_kbd_irq;
|
|
extern int of_i8042_aux_irq;
|
|
# define I8042_KBD_IRQ of_i8042_kbd_irq
|
|
# define I8042_AUX_IRQ of_i8042_aux_irq
|
|
#else
|
|
# define I8042_KBD_IRQ 1
|
|
# define I8042_AUX_IRQ 12
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Register numbers.
|
|
*/
|
|
|
|
#define I8042_COMMAND_REG 0x64
|
|
#define I8042_STATUS_REG 0x64
|
|
#define I8042_DATA_REG 0x60
|
|
|
|
static inline int i8042_read_data(void)
|
|
{
|
|
return inb(I8042_DATA_REG);
|
|
}
|
|
|
|
static inline int i8042_read_status(void)
|
|
{
|
|
return inb(I8042_STATUS_REG);
|
|
}
|
|
|
|
static inline void i8042_write_data(int val)
|
|
{
|
|
outb(val, I8042_DATA_REG);
|
|
}
|
|
|
|
static inline void i8042_write_command(int val)
|
|
{
|
|
outb(val, I8042_COMMAND_REG);
|
|
}
|
|
|
|
static inline int i8042_platform_init(void)
|
|
{
|
|
/*
|
|
* On some platforms touching the i8042 data register region can do really
|
|
* bad things. Because of this the region is always reserved on such boxes.
|
|
*/
|
|
#if defined(CONFIG_PPC)
|
|
if (check_legacy_ioport(I8042_DATA_REG))
|
|
return -ENODEV;
|
|
#endif
|
|
#if !defined(__sh__) && !defined(__alpha__)
|
|
if (!request_region(I8042_DATA_REG, 16, "i8042"))
|
|
return -EBUSY;
|
|
#endif
|
|
|
|
i8042_reset = I8042_RESET_ALWAYS;
|
|
return 0;
|
|
}
|
|
|
|
static inline void i8042_platform_exit(void)
|
|
{
|
|
#if !defined(__sh__) && !defined(__alpha__)
|
|
release_region(I8042_DATA_REG, 16);
|
|
#endif
|
|
}
|
|
|
|
#endif /* _I8042_IO_H */
|