1 /*
2 * Atari Falcon IDE Driver
3 *
4 * Created 12 Jul 1997 by Geert Uytterhoeven
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 */
10
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/mm.h>
14 #include <linux/interrupt.h>
15 #include <linux/blkdev.h>
16 #include <linux/ide.h>
17 #include <linux/init.h>
18
19 #include <asm/setup.h>
20 #include <asm/atarihw.h>
21 #include <asm/atariints.h>
22 #include <asm/atari_stdma.h>
23
24 #define DRV_NAME "falconide"
25
26 /*
27 * Base of the IDE interface
28 */
29
30 #define ATA_HD_BASE 0xfff00000
31
32 /*
33 * Offsets from the above base
34 */
35
36 #define ATA_HD_CONTROL 0x39
37
38 /*
39 * falconide_intr_lock is used to obtain access to the IDE interrupt,
40 * which is shared between several drivers.
41 */
42
43 int falconide_intr_lock;
44 EXPORT_SYMBOL(falconide_intr_lock);
45
falconide_input_data(ide_drive_t * drive,struct request * rq,void * buf,unsigned int len)46 static void falconide_input_data(ide_drive_t *drive, struct request *rq,
47 void *buf, unsigned int len)
48 {
49 unsigned long data_addr = drive->hwif->io_ports.data_addr;
50
51 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
52 return insw(data_addr, buf, (len + 1) / 2);
53
54 insw_swapw(data_addr, buf, (len + 1) / 2);
55 }
56
falconide_output_data(ide_drive_t * drive,struct request * rq,void * buf,unsigned int len)57 static void falconide_output_data(ide_drive_t *drive, struct request *rq,
58 void *buf, unsigned int len)
59 {
60 unsigned long data_addr = drive->hwif->io_ports.data_addr;
61
62 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
63 return outsw(data_addr, buf, (len + 1) / 2);
64
65 outsw_swapw(data_addr, buf, (len + 1) / 2);
66 }
67
68 /* Atari has a byte-swapped IDE interface */
69 static const struct ide_tp_ops falconide_tp_ops = {
70 .exec_command = ide_exec_command,
71 .read_status = ide_read_status,
72 .read_altstatus = ide_read_altstatus,
73
74 .set_irq = ide_set_irq,
75
76 .tf_load = ide_tf_load,
77 .tf_read = ide_tf_read,
78
79 .input_data = falconide_input_data,
80 .output_data = falconide_output_data,
81 };
82
83 static const struct ide_port_info falconide_port_info = {
84 .tp_ops = &falconide_tp_ops,
85 .host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_SERIALIZE,
86 };
87
falconide_setup_ports(hw_regs_t * hw)88 static void __init falconide_setup_ports(hw_regs_t *hw)
89 {
90 int i;
91
92 memset(hw, 0, sizeof(*hw));
93
94 hw->io_ports.data_addr = ATA_HD_BASE;
95
96 for (i = 1; i < 8; i++)
97 hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
98
99 hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
100
101 hw->irq = IRQ_MFP_IDE;
102 hw->ack_intr = NULL;
103
104 hw->chipset = ide_generic;
105 }
106
107 /*
108 * Probe for a Falcon IDE interface
109 */
110
falconide_init(void)111 static int __init falconide_init(void)
112 {
113 struct ide_host *host;
114 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
115 int rc;
116
117 if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
118 return -ENODEV;
119
120 printk(KERN_INFO "ide: Falcon IDE controller\n");
121
122 if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
123 printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
124 return -EBUSY;
125 }
126
127 falconide_setup_ports(&hw);
128
129 host = ide_host_alloc(&falconide_port_info, hws);
130 if (host == NULL) {
131 rc = -ENOMEM;
132 goto err;
133 }
134
135 ide_get_lock(NULL, NULL);
136 rc = ide_host_register(host, &falconide_port_info, hws);
137 ide_release_lock();
138
139 if (rc)
140 goto err_free;
141
142 return 0;
143 err_free:
144 ide_host_free(host);
145 err:
146 release_mem_region(ATA_HD_BASE, 0x40);
147 return rc;
148 }
149
150 module_init(falconide_init);
151
152 MODULE_LICENSE("GPL");
153