summaryrefslogtreecommitdiffstats
path: root/include/asm-mips/ide.h
blob: 10da7219812065ca758f053eb003fa8d8d50ab11 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * This file contains the MIPS architecture specific IDE code.
 *
 * Copyright (C) 1994-1996  Linus Torvalds & authors
 */

#ifndef __ASM_IDE_H
#define __ASM_IDE_H

#ifdef __KERNEL__

#include <linux/config.h>
#include <asm/io.h>

#ifndef MAX_HWIFS
# ifdef CONFIG_BLK_DEV_IDEPCI
#define MAX_HWIFS	10
# else
#define MAX_HWIFS	6
# endif
#endif

#define ide__sti()	__sti()

struct ide_ops {
	int (*ide_default_irq)(ide_ioreg_t base);
	ide_ioreg_t (*ide_default_io_base)(int index);
	void (*ide_init_hwif_ports)(hw_regs_t *hw, ide_ioreg_t data_port,
	                            ide_ioreg_t ctrl_port, int *irq);
	int (*ide_request_irq)(unsigned int irq, void (*handler)(int, void *,
	                       struct pt_regs *), unsigned long flags,
	                       const char *device, void *dev_id);
	void (*ide_free_irq)(unsigned int irq, void *dev_id);
	int (*ide_check_region) (ide_ioreg_t from, unsigned int extent);
	void (*ide_request_region)(ide_ioreg_t from, unsigned int extent,
	                        const char *name);
	void (*ide_release_region)(ide_ioreg_t from, unsigned int extent);
};

extern struct ide_ops *ide_ops;

static __inline__ int ide_default_irq(ide_ioreg_t base)
{
	return ide_ops->ide_default_irq(base);
}

static __inline__ ide_ioreg_t ide_default_io_base(int index)
{
	return ide_ops->ide_default_io_base(index);
}

static inline void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port,
                                       ide_ioreg_t ctrl_port, int *irq)
{
	ide_ioreg_t reg = data_port;
	int i;

	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
		hw->io_ports[i] = reg;
		reg += 1;
	}
	if (ctrl_port) {
		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
	} else {
		hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
	}
	if (irq != NULL)
		*irq = 0;
	hw->io_ports[IDE_IRQ_OFFSET] = 0;
}

static __inline__ void ide_init_default_hwifs(void)
{
#ifndef CONFIG_BLK_DEV_IDEPCI
	hw_regs_t hw;
	int index;

	for(index = 0; index < MAX_HWIFS; index++) {
		ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
		hw.irq = ide_default_irq(ide_default_io_base(index));
		ide_register_hw(&hw, NULL);
	}
#endif /* CONFIG_BLK_DEV_IDEPCI */
}

typedef union {
	unsigned all			: 8;	/* all of the bits together */
	struct {
#ifdef __MIPSEB__
		unsigned bit7		: 1;	/* always 1 */
		unsigned lba		: 1;	/* using LBA instead of CHS */
		unsigned bit5		: 1;	/* always 1 */
		unsigned unit		: 1;	/* drive select number, 0 or 1 */
		unsigned head		: 4;	/* always zeros here */
#else
		unsigned head		: 4;	/* always zeros here */
		unsigned unit		: 1;	/* drive select number, 0 or 1 */
		unsigned bit5		: 1;	/* always 1 */
		unsigned lba		: 1;	/* using LBA instead of CHS */
		unsigned bit7		: 1;	/* always 1 */
#endif
	} b;
} select_t;

static __inline__ int ide_request_irq(unsigned int irq, void (*handler)(int,void *, struct pt_regs *),
			unsigned long flags, const char *device, void *dev_id)
{
	return ide_ops->ide_request_irq(irq, handler, flags, device, dev_id);
}

static __inline__ void ide_free_irq(unsigned int irq, void *dev_id)
{
	ide_ops->ide_free_irq(irq, dev_id);
}

static __inline__ int ide_check_region (ide_ioreg_t from, unsigned int extent)
{
	return ide_ops->ide_check_region(from, extent);
}

static __inline__ void ide_request_region(ide_ioreg_t from,
                                          unsigned int extent, const char *name)
{
	ide_ops->ide_request_region(from, extent, name);
}

static __inline__ void ide_release_region(ide_ioreg_t from,
                                          unsigned int extent)
{
	ide_ops->ide_release_region(from, extent);
}

#undef  SUPPORT_VLB_SYNC
#define SUPPORT_VLB_SYNC 0

#if defined(__MIPSEB__)

#define T_CHAR          (0x0000)        /* char:  don't touch  */
#define T_SHORT         (0x4000)        /* short: 12 -> 21     */
#define T_INT           (0x8000)        /* int:   1234 -> 4321 */
#define T_TEXT          (0xc000)        /* text:  12 -> 21     */

#define T_MASK_TYPE     (0xc000)
#define T_MASK_COUNT    (0x3fff)

#define D_CHAR(cnt)     (T_CHAR  | (cnt))
#define D_SHORT(cnt)    (T_SHORT | (cnt))
#define D_INT(cnt)      (T_INT   | (cnt))
#define D_TEXT(cnt)     (T_TEXT  | (cnt))

static u_short driveid_types[] = {
	D_SHORT(10),	/* config - vendor2 */
	D_TEXT(20),	/* serial_no */
	D_SHORT(3),	/* buf_type - ecc_bytes */
	D_TEXT(48),	/* fw_rev - model */
	D_CHAR(2),	/* max_multsect - vendor3 */
	D_SHORT(1),	/* dword_io */
	D_CHAR(2),	/* vendor4 - capability */
	D_SHORT(1),	/* reserved50 */
	D_CHAR(4),	/* vendor5 - tDMA */
	D_SHORT(4),	/* field_valid - cur_sectors */
	D_INT(1),	/* cur_capacity */
	D_CHAR(2),	/* multsect - multsect_valid */
	D_INT(1),	/* lba_capacity */
	D_SHORT(194)	/* dma_1word - reservedyy */
};

#define num_driveid_types       (sizeof(driveid_types)/sizeof(*driveid_types))

static __inline__ void ide_fix_driveid(struct hd_driveid *id)
{
	u_char *p = (u_char *)id;
	int i, j, cnt;
	u_char t;

	for (i = 0; i < num_driveid_types; i++) {
		cnt = driveid_types[i] & T_MASK_COUNT;
		switch (driveid_types[i] & T_MASK_TYPE) {
		case T_CHAR:
			p += cnt;
			break;
		case T_SHORT:
			for (j = 0; j < cnt; j++) {
				t = p[0];
				p[0] = p[1];
				p[1] = t;
				p += 2;
			}
			break;
		case T_INT:
			for (j = 0; j < cnt; j++) {
				t = p[0];
				p[0] = p[3];
				p[3] = t;
				t = p[1];
				p[1] = p[2];
				p[2] = t;
				p += 4;
			}
			break;
		case T_TEXT:
			for (j = 0; j < cnt; j += 2) {
				t = p[0];
				p[0] = p[1];
				p[1] = t;
				p += 2;
			}
			break;
		};
	}
}

#else /* defined(CONFIG_SWAP_IO_SPACE) && defined(__MIPSEB__)  */

#define ide_fix_driveid(id)		do {} while (0)

#endif

/*
 * The following are not needed for the non-m68k ports
 */
#define ide_ack_intr(hwif)		(1)
#define ide_release_lock(lock)		do {} while (0)
#define ide_get_lock(lock, hdlr, data)	do {} while (0)

#endif /* __KERNEL__ */

#endif /* __ASM_IDE_H */