File: /usr/src/linux/include/asm-i386/ide.h

1     /*
2      *  linux/include/asm-i386/ide.h
3      *
4      *  Copyright (C) 1994-1996  Linus Torvalds & authors
5      */
6     
7     /*
8      *  This file contains the i386 architecture specific IDE code.
9      */
10     
11     #ifndef __ASMi386_IDE_H
12     #define __ASMi386_IDE_H
13     
14     #ifdef __KERNEL__
15     
16     #include <linux/config.h>
17     
18     #ifndef MAX_HWIFS
19     # ifdef CONFIG_BLK_DEV_IDEPCI
20     #define MAX_HWIFS	10
21     # else
22     #define MAX_HWIFS	6
23     # endif
24     #endif
25     
26     #define ide__sti()	__sti()
27     
28     static __inline__ int ide_default_irq(ide_ioreg_t base)
29     {
30     	switch (base) {
31     		case 0x1f0: return 14;
32     		case 0x170: return 15;
33     		case 0x1e8: return 11;
34     		case 0x168: return 10;
35     		case 0x1e0: return 8;
36     		case 0x160: return 12;
37     		default:
38     			return 0;
39     	}
40     }
41     
42     static __inline__ ide_ioreg_t ide_default_io_base(int index)
43     {
44     	switch (index) {
45     		case 0:	return 0x1f0;
46     		case 1:	return 0x170;
47     		case 2: return 0x1e8;
48     		case 3: return 0x168;
49     		case 4: return 0x1e0;
50     		case 5: return 0x160;
51     		default:
52     			return 0;
53     	}
54     }
55     
56     static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
57     {
58     	ide_ioreg_t reg = data_port;
59     	int i;
60     
61     	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
62     		hw->io_ports[i] = reg;
63     		reg += 1;
64     	}
65     	if (ctrl_port) {
66     		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
67     	} else {
68     		hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
69     	}
70     	if (irq != NULL)
71     		*irq = 0;
72     	hw->io_ports[IDE_IRQ_OFFSET] = 0;
73     }
74     
75     static __inline__ void ide_init_default_hwifs(void)
76     {
77     #ifndef CONFIG_BLK_DEV_IDEPCI
78     	hw_regs_t hw;
79     	int index;
80     
81     	for(index = 0; index < MAX_HWIFS; index++) {
82     		ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
83     		hw.irq = ide_default_irq(ide_default_io_base(index));
84     		ide_register_hw(&hw, NULL);
85     	}
86     #endif /* CONFIG_BLK_DEV_IDEPCI */
87     }
88     
89     typedef union {
90     	unsigned all			: 8;	/* all of the bits together */
91     	struct {
92     		unsigned head		: 4;	/* always zeros here */
93     		unsigned unit		: 1;	/* drive select number, 0 or 1 */
94     		unsigned bit5		: 1;	/* always 1 */
95     		unsigned lba		: 1;	/* using LBA instead of CHS */
96     		unsigned bit7		: 1;	/* always 1 */
97     	} b;
98     	} select_t;
99     
100     #define ide_request_irq(irq,hand,flg,dev,id)	request_irq((irq),(hand),(flg),(dev),(id))
101     #define ide_free_irq(irq,dev_id)		free_irq((irq), (dev_id))
102     #define ide_check_region(from,extent)		check_region((from), (extent))
103     #define ide_request_region(from,extent,name)	request_region((from), (extent), (name))
104     #define ide_release_region(from,extent)		release_region((from), (extent))
105     
106     /*
107      * The following are not needed for the non-m68k ports
108      */
109     #define ide_ack_intr(hwif)		(1)
110     #define ide_fix_driveid(id)		do {} while (0)
111     #define ide_release_lock(lock)		do {} while (0)
112     #define ide_get_lock(lock, hdlr, data)	do {} while (0)
113     
114     #endif /* __KERNEL__ */
115     
116     #endif /* __ASMi386_IDE_H */
117