| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> |
| * |
| * Adapted from coreboot src/include/device/pnp_def.h |
| * and arch/x86/include/arch/io.h |
| */ |
| |
| #ifndef _ASM_PNP_DEF_H_ |
| #define _ASM_PNP_DEF_H_ |
| |
| #include <asm/io.h> |
| |
| #define PNP_IDX_EN 0x30 |
| #define PNP_IDX_IO0 0x60 |
| #define PNP_IDX_IO1 0x62 |
| #define PNP_IDX_IO2 0x64 |
| #define PNP_IDX_IO3 0x66 |
| #define PNP_IDX_IRQ0 0x70 |
| #define PNP_IDX_IRQ1 0x72 |
| #define PNP_IDX_DRQ0 0x74 |
| #define PNP_IDX_DRQ1 0x75 |
| #define PNP_IDX_MSC0 0xf0 |
| #define PNP_IDX_MSC1 0xf1 |
| |
| /* Generic functions for pnp devices */ |
| |
| /* |
| * pnp device is a 16-bit integer composed of its i/o port address at high byte |
| * and logic function number at low byte. |
| */ |
| #define PNP_DEV(PORT, FUNC) (((PORT) << 8) | (FUNC)) |
| |
| static inline void pnp_write_config(uint16_t dev, uint8_t reg, uint8_t value) |
| { |
| uint8_t port = dev >> 8; |
| |
| outb(reg, port); |
| outb(value, port + 1); |
| } |
| |
| static inline uint8_t pnp_read_config(uint16_t dev, uint8_t reg) |
| { |
| uint8_t port = dev >> 8; |
| |
| outb(reg, port); |
| return inb(port + 1); |
| } |
| |
| static inline void pnp_set_logical_device(uint16_t dev) |
| { |
| uint8_t device = dev & 0xff; |
| |
| pnp_write_config(dev, 0x07, device); |
| } |
| |
| static inline void pnp_set_enable(uint16_t dev, int enable) |
| { |
| pnp_write_config(dev, PNP_IDX_EN, enable ? 1 : 0); |
| } |
| |
| static inline int pnp_read_enable(uint16_t dev) |
| { |
| return !!pnp_read_config(dev, PNP_IDX_EN); |
| } |
| |
| static inline void pnp_set_iobase(uint16_t dev, uint8_t index, uint16_t iobase) |
| { |
| pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff); |
| pnp_write_config(dev, index + 1, iobase & 0xff); |
| } |
| |
| static inline uint16_t pnp_read_iobase(uint16_t dev, uint8_t index) |
| { |
| return ((uint16_t)(pnp_read_config(dev, index)) << 8) | |
| pnp_read_config(dev, index + 1); |
| } |
| |
| static inline void pnp_set_irq(uint16_t dev, uint8_t index, unsigned irq) |
| { |
| pnp_write_config(dev, index, irq); |
| } |
| |
| static inline void pnp_set_drq(uint16_t dev, uint8_t index, unsigned drq) |
| { |
| pnp_write_config(dev, index, drq & 0xff); |
| } |
| |
| #endif /* _ASM_PNP_DEF_H_ */ |