90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef _I8042_IO_H
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#define _I8042_IO_H
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/*
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* Names.
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*/
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#define I8042_KBD_PHYS_DESC "isa0060/serio0"
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#define I8042_AUX_PHYS_DESC "isa0060/serio1"
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#define I8042_MUX_PHYS_DESC "isa0060/serio%d"
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/*
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* IRQs.
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*/
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#ifdef __alpha__
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# define I8042_KBD_IRQ 1
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# define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */
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#elif defined(__arm__)
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/* defined in include/asm-arm/arch-xxx/irqs.h */
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#include <asm/irq.h>
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#elif defined(CONFIG_PPC)
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extern int of_i8042_kbd_irq;
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extern int of_i8042_aux_irq;
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# define I8042_KBD_IRQ of_i8042_kbd_irq
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# define I8042_AUX_IRQ of_i8042_aux_irq
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#else
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# define I8042_KBD_IRQ 1
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# define I8042_AUX_IRQ 12
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#endif
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/*
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* Register numbers.
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*/
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#define I8042_COMMAND_REG 0x64
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#define I8042_STATUS_REG 0x64
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#define I8042_DATA_REG 0x60
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static inline int i8042_read_data(void)
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{
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return inb(I8042_DATA_REG);
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}
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static inline int i8042_read_status(void)
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{
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return inb(I8042_STATUS_REG);
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}
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static inline void i8042_write_data(int val)
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{
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outb(val, I8042_DATA_REG);
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}
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static inline void i8042_write_command(int val)
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{
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outb(val, I8042_COMMAND_REG);
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}
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static inline int i8042_platform_init(void)
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{
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/*
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* On some platforms touching the i8042 data register region can do really
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* bad things. Because of this the region is always reserved on such boxes.
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*/
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#if defined(CONFIG_PPC)
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if (check_legacy_ioport(I8042_DATA_REG))
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return -ENODEV;
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#endif
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#if !defined(__sh__) && !defined(__alpha__)
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if (!request_region(I8042_DATA_REG, 16, "i8042"))
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return -EBUSY;
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#endif
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i8042_reset = I8042_RESET_ALWAYS;
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return 0;
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}
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static inline void i8042_platform_exit(void)
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{
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#if !defined(__sh__) && !defined(__alpha__)
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release_region(I8042_DATA_REG, 16);
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#endif
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}
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#endif /* _I8042_IO_H */
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