1 /* 2 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> 3 * 4 * Adapted from coreboot src/include/device/pnp_def.h 5 * and arch/x86/include/arch/io.h 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #ifndef _ASM_PNP_DEF_H_ 11 #define _ASM_PNP_DEF_H_ 12 13 #include <asm/io.h> 14 15 #define PNP_IDX_EN 0x30 16 #define PNP_IDX_IO0 0x60 17 #define PNP_IDX_IO1 0x62 18 #define PNP_IDX_IO2 0x64 19 #define PNP_IDX_IO3 0x66 20 #define PNP_IDX_IRQ0 0x70 21 #define PNP_IDX_IRQ1 0x72 22 #define PNP_IDX_DRQ0 0x74 23 #define PNP_IDX_DRQ1 0x75 24 #define PNP_IDX_MSC0 0xf0 25 #define PNP_IDX_MSC1 0xf1 26 27 /* Generic functions for pnp devices */ 28 29 /* 30 * pnp device is a 16-bit integer composed of its i/o port address at high byte 31 * and logic function number at low byte. 32 */ 33 #define PNP_DEV(PORT, FUNC) (((PORT) << 8) | (FUNC)) 34 35 static inline void pnp_write_config(uint16_t dev, uint8_t reg, uint8_t value) 36 { 37 uint8_t port = dev >> 8; 38 39 outb(reg, port); 40 outb(value, port + 1); 41 } 42 43 static inline uint8_t pnp_read_config(uint16_t dev, uint8_t reg) 44 { 45 uint8_t port = dev >> 8; 46 47 outb(reg, port); 48 return inb(port + 1); 49 } 50 51 static inline void pnp_set_logical_device(uint16_t dev) 52 { 53 uint8_t device = dev & 0xff; 54 55 pnp_write_config(dev, 0x07, device); 56 } 57 58 static inline void pnp_set_enable(uint16_t dev, int enable) 59 { 60 pnp_write_config(dev, PNP_IDX_EN, enable ? 1 : 0); 61 } 62 63 static inline int pnp_read_enable(uint16_t dev) 64 { 65 return !!pnp_read_config(dev, PNP_IDX_EN); 66 } 67 68 static inline void pnp_set_iobase(uint16_t dev, uint8_t index, uint16_t iobase) 69 { 70 pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff); 71 pnp_write_config(dev, index + 1, iobase & 0xff); 72 } 73 74 static inline uint16_t pnp_read_iobase(uint16_t dev, uint8_t index) 75 { 76 return ((uint16_t)(pnp_read_config(dev, index)) << 8) | 77 pnp_read_config(dev, index + 1); 78 } 79 80 static inline void pnp_set_irq(uint16_t dev, uint8_t index, unsigned irq) 81 { 82 pnp_write_config(dev, index, irq); 83 } 84 85 static inline void pnp_set_drq(uint16_t dev, uint8_t index, unsigned drq) 86 { 87 pnp_write_config(dev, index, drq & 0xff); 88 } 89 90 #endif /* _ASM_PNP_DEF_H_ */ 91