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
233
234
235
236
237
238
239
|
/*
* Amiga Buddha, Catweasel and X-Surf IDE Driver
*
* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
*
* This driver was written based on the specifications in README.buddha and
* the X-Surf info from Inside_XSurf.txt available at
* http://www.jschoenfeld.com
*
* 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.
*
* TODO:
* - test it :-)
* - tune the timings using the speed-register
*/
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/zorro.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
/*
* The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
*/
#define BUDDHA_NUM_HWIFS 2
#define CATWEASEL_NUM_HWIFS 3
#define XSURF_NUM_HWIFS 2
#define MAX_NUM_HWIFS 3
/*
* Bases of the IDE interfaces (relative to the board address)
*/
#define BUDDHA_BASE1 0x800
#define BUDDHA_BASE2 0xa00
#define BUDDHA_BASE3 0xc00
#define XSURF_BASE1 0xb000 /* 2.5" Interface */
#define XSURF_BASE2 0xd000 /* 3.5" Interface */
static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
};
static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
XSURF_BASE1, XSURF_BASE2
};
/*
* Offsets from one of the above bases
*/
#define BUDDHA_CONTROL 0x11a
/*
* Other registers
*/
#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
#define BUDDHA_IRQ2 0xf40 /* interrupt */
#define BUDDHA_IRQ3 0xf80
#define XSURF_IRQ1 0x7e
#define XSURF_IRQ2 0x7e
static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
};
static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
XSURF_IRQ1, XSURF_IRQ2
};
#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
/*
* Board information
*/
typedef enum BuddhaType_Enum {
BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
} BuddhaType;
static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
/*
* Check and acknowledge the interrupt status
*/
static int buddha_ack_intr(ide_hwif_t *hwif)
{
unsigned char ch;
ch = z_readb(hwif->io_ports.irq_addr);
if (!(ch & 0x80))
return 0;
return 1;
}
static int xsurf_ack_intr(ide_hwif_t *hwif)
{
unsigned char ch;
ch = z_readb(hwif->io_ports.irq_addr);
/* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
z_writeb(0, hwif->io_ports.irq_addr);
if (!(ch & 0x80))
return 0;
return 1;
}
static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
unsigned long ctl, unsigned long irq_port,
ide_ack_intr_t *ack_intr)
{
int i;
memset(hw, 0, sizeof(*hw));
hw->io_ports.data_addr = base;
for (i = 1; i < 8; i++)
hw->io_ports_array[i] = base + 2 + i * 4;
hw->io_ports.ctl_addr = ctl;
hw->io_ports.irq_addr = irq_port;
hw->irq = IRQ_AMIGA_PORTS;
hw->ack_intr = ack_intr;
hw->chipset = ide_generic;
}
/*
* Probe for a Buddha or Catweasel IDE interface
*/
static int __init buddha_init(void)
{
struct zorro_dev *z = NULL;
struct ide_host *host;
u_long buddha_board = 0;
BuddhaType type;
int buddha_num_hwifs, i;
while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
unsigned long board;
hw_regs_t hw[MAX_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
buddha_num_hwifs = BUDDHA_NUM_HWIFS;
type=BOARD_BUDDHA;
} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
type=BOARD_CATWEASEL;
} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
buddha_num_hwifs = XSURF_NUM_HWIFS;
type=BOARD_XSURF;
} else
continue;
board = z->resource.start;
/*
* FIXME: we now have selectable mmio v/s iomio transports.
*/
if(type != BOARD_XSURF) {
if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
continue;
} else {
if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
continue;
if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
goto fail_base2;
if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
release_mem_region(board+XSURF_BASE2, 0x1000);
fail_base2:
release_mem_region(board+XSURF_BASE1, 0x1000);
continue;
}
}
buddha_board = ZTWO_VADDR(board);
/* write to BUDDHA_IRQ_MR to enable the board IRQ */
/* X-Surf doesn't have this. IRQs are always on */
if (type != BOARD_XSURF)
z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
printk(KERN_INFO "ide: %s IDE controller\n",
buddha_board_name[type]);
for (i = 0; i < buddha_num_hwifs; i++) {
unsigned long base, ctl, irq_port;
ide_ack_intr_t *ack_intr;
if (type != BOARD_XSURF) {
base = buddha_board + buddha_bases[i];
ctl = base + BUDDHA_CONTROL;
irq_port = buddha_board + buddha_irqports[i];
ack_intr = buddha_ack_intr;
} else {
base = buddha_board + xsurf_bases[i];
/* X-Surf has no CS1* (Control/AltStat) */
ctl = 0;
irq_port = buddha_board + xsurf_irqports[i];
ack_intr = xsurf_ack_intr;
}
buddha_setup_ports(&hw[i], base, ctl, irq_port,
ack_intr);
hws[i] = &hw[i];
}
host = ide_host_alloc(NULL, hws);
if (host)
ide_host_register(host, NULL, hws);
}
return 0;
}
module_init(buddha_init);
MODULE_LICENSE("GPL");
|
