1/*
2 *  linux/include/asm-alpha/ide.h
3 *
4 *  Copyright (C) 1994-1996  Linus Torvalds & authors
5 */
6
7/*
8 *  This file contains the alpha architecture specific IDE code.
9 */
10
11#ifndef __ASMalpha_IDE_H
12#define __ASMalpha_IDE_H
13
14#ifdef __KERNEL__
15
16#include <linux/config.h>
17
18#ifndef MAX_HWIFS
19#define MAX_HWIFS	4
20#endif
21
22#define ide__sti()	__sti()
23
24static __inline__ int ide_default_irq(ide_ioreg_t base)
25{
26	switch (base) {
27		case 0x1f0: return 14;
28		case 0x170: return 15;
29		case 0x1e8: return 11;
30		case 0x168: return 10;
31		default:
32			return 0;
33	}
34}
35
36static __inline__ ide_ioreg_t ide_default_io_base(int index)
37{
38	switch (index) {
39		case 0:	return 0x1f0;
40		case 1:	return 0x170;
41		case 2: return 0x1e8;
42		case 3: return 0x168;
43		default:
44			return 0;
45	}
46}
47
48static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
49{
50	ide_ioreg_t reg = data_port;
51	int i;
52
53	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
54		hw->io_ports[i] = reg;
55		reg += 1;
56	}
57	if (ctrl_port) {
58		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
59	} else {
60		hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
61	}
62	if (irq != NULL)
63		*irq = 0;
64	hw->io_ports[IDE_IRQ_OFFSET] = 0;
65}
66
67/*
68 * This registers the standard ports for this architecture with the IDE
69 * driver.
70 */
71static __inline__ void ide_init_default_hwifs(void)
72{
73#ifndef CONFIG_BLK_DEV_IDEPCI
74	hw_regs_t hw;
75	int index;
76
77	for (index = 0; index < MAX_HWIFS; index++) {
78		ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
79		hw.irq = ide_default_irq(ide_default_io_base(index));
80		ide_register_hw(&hw, NULL);
81	}
82#endif /* CONFIG_BLK_DEV_IDEPCI */
83}
84
85typedef union {
86	unsigned all			: 8;	/* all of the bits together */
87	struct {
88		unsigned head		: 4;	/* always zeros here */
89		unsigned unit		: 1;	/* drive select number, 0 or 1 */
90		unsigned bit5		: 1;	/* always 1 */
91		unsigned lba		: 1;	/* using LBA instead of CHS */
92		unsigned bit7		: 1;	/* always 1 */
93	} b;
94} select_t;
95
96typedef union {
97	unsigned all			: 8;	/* all of the bits together */
98	struct {
99		unsigned bit0		: 1;
100		unsigned nIEN		: 1;	/* device INTRQ to host */
101		unsigned SRST		: 1;	/* host soft reset bit */
102		unsigned bit3		: 1;	/* ATA-2 thingy */
103		unsigned reserved456	: 3;
104		unsigned HOB		: 1;	/* 48-bit address ordering */
105	} b;
106} control_t;
107
108#define ide_request_irq(irq,hand,flg,dev,id)	request_irq((irq),(hand),(flg),(dev),(id))
109#define ide_free_irq(irq,dev_id)		free_irq((irq), (dev_id))
110#define ide_check_region(from,extent)		check_region((from), (extent))
111#define ide_request_region(from,extent,name)	request_region((from), (extent), (name))
112#define ide_release_region(from,extent)		release_region((from), (extent))
113
114/*
115 * The following are not needed for the non-m68k ports
116 */
117#define ide_ack_intr(hwif)		(1)
118#define ide_fix_driveid(id)		do {} while (0)
119#define ide_release_lock(lock)		do {} while (0)
120#define ide_get_lock(lock, hdlr, data)	do {} while (0)
121
122#endif /* __KERNEL__ */
123
124#endif /* __ASMalpha_IDE_H */
125