mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 14:14:01 +08:00
30cbc22217
ppc can boot one single binary on prep, chrp and pmac boards. ppc64 can boot one single binary on pseries and G5 boards. pmac has no legacy io, probing for PC style legacy hardware (or accessing the legacy io area regulary) may lead to a hard crash: * add check for parport_pc, exit on pmac. 32bit chrp has no ->check_legacy_ioport, the probe is always called. 64bit chrp has check_legacy_ioport, check for a "parallel" node * add check for isapnp, only PReP boards may have real ISA slots. 32bit PReP will have no ->check_legacy_ioport, the probe is always called. * update code in i8042_platform_init. Run ->check_legacy_ioport first, always call request_region. No functional change. Remove whitespace before i8042_reset init. Signed-off-by: Olaf Hering <olaf@aepfle.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
91 lines
1.8 KiB
C
91 lines
1.8 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_SUPERH64)
|
|
#include <asm/irq.h>
|
|
#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_MERGE)
|
|
if (check_legacy_ioport(I8042_DATA_REG))
|
|
return -ENODEV;
|
|
#endif
|
|
#if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__)
|
|
if (!request_region(I8042_DATA_REG, 16, "i8042"))
|
|
return -EBUSY;
|
|
#endif
|
|
|
|
i8042_reset = 1;
|
|
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 */
|