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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
58f189fc | 2 | * Atari Falcon IDE Driver |
1da177e4 LT |
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 | ||
88f8bb78 | 11 | #include <linux/module.h> |
1da177e4 LT |
12 | #include <linux/types.h> |
13 | #include <linux/mm.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/blkdev.h> | |
1da177e4 LT |
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 | ||
cb5528ab | 24 | #define DRV_NAME "falconide" |
1da177e4 LT |
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 | ||
1da177e4 LT |
36 | #define ATA_HD_CONTROL 0x39 |
37 | ||
1da177e4 LT |
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; | |
88f8bb78 | 44 | EXPORT_SYMBOL(falconide_intr_lock); |
1da177e4 | 45 | |
9567b349 BZ |
46 | static void falconide_input_data(ide_drive_t *drive, struct request *rq, |
47 | void *buf, unsigned int len) | |
92d3ab27 | 48 | { |
9567b349 | 49 | unsigned long data_addr = drive->hwif->io_ports.data_addr; |
92d3ab27 | 50 | |
92d3ab27 | 51 | if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS) |
9567b349 | 52 | return insw(data_addr, buf, (len + 1) / 2); |
92d3ab27 | 53 | |
9567b349 | 54 | insw_swapw(data_addr, buf, (len + 1) / 2); |
92d3ab27 BZ |
55 | } |
56 | ||
9567b349 BZ |
57 | static void falconide_output_data(ide_drive_t *drive, struct request *rq, |
58 | void *buf, unsigned int len) | |
92d3ab27 | 59 | { |
9567b349 BZ |
60 | unsigned long data_addr = drive->hwif->io_ports.data_addr; |
61 | ||
92d3ab27 | 62 | if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS) |
ab1a8521 | 63 | return outsw(data_addr, buf, (len + 1) / 2); |
92d3ab27 | 64 | |
9567b349 | 65 | outsw_swapw(data_addr, buf, (len + 1) / 2); |
92d3ab27 BZ |
66 | } |
67 | ||
374e042c BZ |
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, | |
374e042c BZ |
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, | |
86 | }; | |
87 | ||
29dd5975 BZ |
88 | static void __init falconide_setup_ports(hw_regs_t *hw) |
89 | { | |
90 | int i; | |
91 | ||
92 | memset(hw, 0, sizeof(*hw)); | |
93 | ||
4c3032d8 | 94 | hw->io_ports.data_addr = ATA_HD_BASE; |
29dd5975 BZ |
95 | |
96 | for (i = 1; i < 8; i++) | |
4c3032d8 | 97 | hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4; |
29dd5975 | 98 | |
4c3032d8 | 99 | hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL; |
29dd5975 BZ |
100 | |
101 | hw->irq = IRQ_MFP_IDE; | |
102 | hw->ack_intr = NULL; | |
d427e836 BZ |
103 | |
104 | hw->chipset = ide_generic; | |
29dd5975 | 105 | } |
1da177e4 LT |
106 | |
107 | /* | |
108 | * Probe for a Falcon IDE interface | |
109 | */ | |
110 | ||
ade2daf9 | 111 | static int __init falconide_init(void) |
1da177e4 | 112 | { |
48c3c107 | 113 | struct ide_host *host; |
c97c6aca | 114 | hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; |
8a69580e | 115 | int rc; |
1da177e4 | 116 | |
29dd5975 | 117 | if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE)) |
8a69580e | 118 | return -ENODEV; |
29dd5975 | 119 | |
c99c92c5 BZ |
120 | printk(KERN_INFO "ide: Falcon IDE controller\n"); |
121 | ||
cb5528ab BZ |
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 | ||
29dd5975 | 127 | falconide_setup_ports(&hw); |
1da177e4 | 128 | |
48c3c107 | 129 | host = ide_host_alloc(&falconide_port_info, hws); |
8a69580e BZ |
130 | if (host == NULL) { |
131 | rc = -ENOMEM; | |
132 | goto err; | |
cbb010c1 | 133 | } |
ade2daf9 | 134 | |
8a69580e BZ |
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 | ||
29dd5975 | 142 | return 0; |
8a69580e BZ |
143 | err_free: |
144 | ide_host_free(host); | |
145 | err: | |
146 | release_mem_region(ATA_HD_BASE, 0x40); | |
147 | return rc; | |
1da177e4 | 148 | } |
ade2daf9 BZ |
149 | |
150 | module_init(falconide_init); | |
0c5ec97b AB |
151 | |
152 | MODULE_LICENSE("GPL"); |