LXR uboot/arch/x86/include/asm/pnp

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