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
|
/*
* Atari Falcon IDE Driver
*
* Created 12 Jul 1997 by Geert Uytterhoeven
*
* 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.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/setup.h>
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/atari_stdma.h>
#define DRV_NAME "falconide"
/*
* Base of the IDE interface
*/
#define ATA_HD_BASE 0xfff00000
/*
* Offsets from the above base
*/
#define ATA_HD_CONTROL 0x39
/*
* falconide_intr_lock is used to obtain access to the IDE interrupt,
* which is shared between several drivers.
*/
int falconide_intr_lock;
EXPORT_SYMBOL(falconide_intr_lock);
static void falconide_input_data(ide_drive_t *drive, struct request *rq,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;
if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
return insw(data_addr, buf, (len + 1) / 2);
insw_swapw(data_addr, buf, (len + 1) / 2);
}
static void falconide_output_data(ide_drive_t *drive, struct request *rq,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;
if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
return outsw(data_addr, buf, (len + 1) / 2);
outsw_swapw(data_addr, buf, (len + 1) / 2);
}
/* Atari has a byte-swapped IDE interface */
static const struct ide_tp_ops falconide_tp_ops = {
.exec_command = ide_exec_command,
.read_status = ide_read_status,
.read_altstatus = ide_read_altstatus,
.read_sff_dma_status = ide_read_sff_dma_status,
.set_irq = ide_set_irq,
.tf_load = ide_tf_load,
.tf_read = ide_tf_read,
.input_data = falconide_input_data,
.output_data = falconide_output_data,
};
static const struct ide_port_info falconide_port_info = {
.tp_ops = &falconide_tp_ops,
.host_flags = IDE_HFLAG_NO_DMA,
};
static void __init falconide_setup_ports(hw_regs_t *hw)
{
int i;
memset(hw, 0, sizeof(*hw));
hw->io_ports.data_addr = ATA_HD_BASE;
for (i = 1; i < 8; i++)
hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
hw->irq = IRQ_MFP_IDE;
hw->ack_intr = NULL;
hw->chipset = ide_generic;
}
/*
* Probe for a Falcon IDE interface
*/
static int __init falconide_init(void)
{
ide_hwif_t *hwif;
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
return 0;
printk(KERN_INFO "ide: Falcon IDE controller\n");
if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
return -EBUSY;
}
falconide_setup_ports(&hw);
hwif = ide_find_port();
if (hwif) {
u8 index = hwif->index;
u8 idx[4] = { index, 0xff, 0xff, 0xff };
ide_get_lock(NULL, NULL);
ide_device_add(idx, &falconide_port_info, hws);
ide_release_lock();
}
return 0;
}
module_init(falconide_init);
MODULE_LICENSE("GPL");
|
