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> | |
16 | #include <linux/hdreg.h> | |
17 | #include <linux/ide.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <asm/setup.h> | |
21 | #include <asm/atarihw.h> | |
22 | #include <asm/atariints.h> | |
23 | #include <asm/atari_stdma.h> | |
24 | ||
cb5528ab | 25 | #define DRV_NAME "falconide" |
1da177e4 LT |
26 | |
27 | /* | |
28 | * Base of the IDE interface | |
29 | */ | |
30 | ||
31 | #define ATA_HD_BASE 0xfff00000 | |
32 | ||
33 | /* | |
34 | * Offsets from the above base | |
35 | */ | |
36 | ||
1da177e4 LT |
37 | #define ATA_HD_CONTROL 0x39 |
38 | ||
1da177e4 LT |
39 | /* |
40 | * falconide_intr_lock is used to obtain access to the IDE interrupt, | |
41 | * which is shared between several drivers. | |
42 | */ | |
43 | ||
44 | int falconide_intr_lock; | |
88f8bb78 | 45 | EXPORT_SYMBOL(falconide_intr_lock); |
1da177e4 | 46 | |
9567b349 BZ |
47 | static void falconide_input_data(ide_drive_t *drive, struct request *rq, |
48 | void *buf, unsigned int len) | |
92d3ab27 | 49 | { |
9567b349 | 50 | unsigned long data_addr = drive->hwif->io_ports.data_addr; |
92d3ab27 | 51 | |
92d3ab27 | 52 | if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS) |
9567b349 | 53 | return insw(data_addr, buf, (len + 1) / 2); |
92d3ab27 | 54 | |
9567b349 | 55 | insw_swapw(data_addr, buf, (len + 1) / 2); |
92d3ab27 BZ |
56 | } |
57 | ||
9567b349 BZ |
58 | static void falconide_output_data(ide_drive_t *drive, struct request *rq, |
59 | void *buf, unsigned int len) | |
92d3ab27 | 60 | { |
9567b349 BZ |
61 | unsigned long data_addr = drive->hwif->io_ports.data_addr; |
62 | ||
92d3ab27 | 63 | if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS) |
ab1a8521 | 64 | return outsw(data_addr, buf, (len + 1) / 2); |
92d3ab27 | 65 | |
9567b349 | 66 | outsw_swapw(data_addr, buf, (len + 1) / 2); |
92d3ab27 BZ |
67 | } |
68 | ||
374e042c BZ |
69 | /* Atari has a byte-swapped IDE interface */ |
70 | static const struct ide_tp_ops falconide_tp_ops = { | |
71 | .exec_command = ide_exec_command, | |
72 | .read_status = ide_read_status, | |
73 | .read_altstatus = ide_read_altstatus, | |
74 | .read_sff_dma_status = ide_read_sff_dma_status, | |
75 | ||
76 | .set_irq = ide_set_irq, | |
77 | ||
78 | .tf_load = ide_tf_load, | |
79 | .tf_read = ide_tf_read, | |
80 | ||
81 | .input_data = falconide_input_data, | |
82 | .output_data = falconide_output_data, | |
83 | }; | |
84 | ||
85 | static const struct ide_port_info falconide_port_info = { | |
86 | .tp_ops = &falconide_tp_ops, | |
87 | .host_flags = IDE_HFLAG_NO_DMA, | |
88 | }; | |
89 | ||
29dd5975 BZ |
90 | static void __init falconide_setup_ports(hw_regs_t *hw) |
91 | { | |
92 | int i; | |
93 | ||
94 | memset(hw, 0, sizeof(*hw)); | |
95 | ||
4c3032d8 | 96 | hw->io_ports.data_addr = ATA_HD_BASE; |
29dd5975 BZ |
97 | |
98 | for (i = 1; i < 8; i++) | |
4c3032d8 | 99 | hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4; |
29dd5975 | 100 | |
4c3032d8 | 101 | hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL; |
29dd5975 BZ |
102 | |
103 | hw->irq = IRQ_MFP_IDE; | |
104 | hw->ack_intr = NULL; | |
d427e836 BZ |
105 | |
106 | hw->chipset = ide_generic; | |
29dd5975 | 107 | } |
1da177e4 LT |
108 | |
109 | /* | |
110 | * Probe for a Falcon IDE interface | |
111 | */ | |
112 | ||
ade2daf9 | 113 | static int __init falconide_init(void) |
1da177e4 | 114 | { |
e79f8126 | 115 | ide_hwif_t *hwif; |
c97c6aca | 116 | hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; |
1da177e4 | 117 | |
29dd5975 BZ |
118 | if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE)) |
119 | return 0; | |
120 | ||
c99c92c5 BZ |
121 | printk(KERN_INFO "ide: Falcon IDE controller\n"); |
122 | ||
cb5528ab BZ |
123 | if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) { |
124 | printk(KERN_ERR "%s: resources busy\n", DRV_NAME); | |
125 | return -EBUSY; | |
126 | } | |
127 | ||
29dd5975 | 128 | falconide_setup_ports(&hw); |
1da177e4 | 129 | |
59bff5ba | 130 | hwif = ide_find_port(); |
cbb010c1 BZ |
131 | if (hwif) { |
132 | u8 index = hwif->index; | |
8ac4ce74 | 133 | u8 idx[4] = { index, 0xff, 0xff, 0xff }; |
cbb010c1 | 134 | |
d684b21f | 135 | ide_get_lock(NULL, NULL); |
374e042c | 136 | ide_device_add(idx, &falconide_port_info, hws); |
d684b21f | 137 | ide_release_lock(); |
cbb010c1 | 138 | } |
ade2daf9 | 139 | |
29dd5975 | 140 | return 0; |
1da177e4 | 141 | } |
ade2daf9 BZ |
142 | |
143 | module_init(falconide_init); | |
0c5ec97b AB |
144 | |
145 | MODULE_LICENSE("GPL"); |