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 | ||
e354c1d8 BZ |
43 | static int falconide_intr_lock; |
44 | ||
45 | static void falconide_release_lock(void) | |
46 | { | |
47 | if (falconide_intr_lock == 0) { | |
48 | printk(KERN_ERR "%s: bug\n", __func__); | |
49 | return; | |
50 | } | |
51 | falconide_intr_lock = 0; | |
52 | stdma_release(); | |
53 | } | |
54 | ||
55 | static void falconide_get_lock(irq_handler_t handler, void *data) | |
56 | { | |
57 | if (falconide_intr_lock == 0) { | |
58 | if (in_interrupt() > 0) | |
59 | panic("Falcon IDE hasn't ST-DMA lock in interrupt"); | |
60 | stdma_lock(handler, data); | |
61 | falconide_intr_lock = 1; | |
62 | } | |
63 | } | |
1da177e4 | 64 | |
adb1af98 | 65 | static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, |
9567b349 | 66 | void *buf, unsigned int len) |
92d3ab27 | 67 | { |
9567b349 | 68 | unsigned long data_addr = drive->hwif->io_ports.data_addr; |
92d3ab27 | 69 | |
adb1af98 | 70 | if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) |
9567b349 | 71 | return insw(data_addr, buf, (len + 1) / 2); |
92d3ab27 | 72 | |
f94116ae | 73 | raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2); |
92d3ab27 BZ |
74 | } |
75 | ||
adb1af98 | 76 | static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, |
9567b349 | 77 | void *buf, unsigned int len) |
92d3ab27 | 78 | { |
9567b349 BZ |
79 | unsigned long data_addr = drive->hwif->io_ports.data_addr; |
80 | ||
adb1af98 | 81 | if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) |
ab1a8521 | 82 | return outsw(data_addr, buf, (len + 1) / 2); |
92d3ab27 | 83 | |
f94116ae | 84 | raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2); |
92d3ab27 BZ |
85 | } |
86 | ||
374e042c BZ |
87 | /* Atari has a byte-swapped IDE interface */ |
88 | static const struct ide_tp_ops falconide_tp_ops = { | |
89 | .exec_command = ide_exec_command, | |
90 | .read_status = ide_read_status, | |
91 | .read_altstatus = ide_read_altstatus, | |
374e042c BZ |
92 | |
93 | .set_irq = ide_set_irq, | |
94 | ||
95 | .tf_load = ide_tf_load, | |
96 | .tf_read = ide_tf_read, | |
97 | ||
98 | .input_data = falconide_input_data, | |
99 | .output_data = falconide_output_data, | |
100 | }; | |
101 | ||
102 | static const struct ide_port_info falconide_port_info = { | |
e354c1d8 BZ |
103 | .get_lock = falconide_get_lock, |
104 | .release_lock = falconide_release_lock, | |
374e042c | 105 | .tp_ops = &falconide_tp_ops, |
09a3e791 BZ |
106 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE | |
107 | IDE_HFLAG_NO_DMA, | |
255115fb | 108 | .irq_flags = IRQF_SHARED, |
374e042c BZ |
109 | }; |
110 | ||
29dd5975 BZ |
111 | static void __init falconide_setup_ports(hw_regs_t *hw) |
112 | { | |
113 | int i; | |
114 | ||
115 | memset(hw, 0, sizeof(*hw)); | |
116 | ||
4c3032d8 | 117 | hw->io_ports.data_addr = ATA_HD_BASE; |
29dd5975 BZ |
118 | |
119 | for (i = 1; i < 8; i++) | |
4c3032d8 | 120 | hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4; |
29dd5975 | 121 | |
4c3032d8 | 122 | hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL; |
29dd5975 BZ |
123 | |
124 | hw->irq = IRQ_MFP_IDE; | |
125 | hw->ack_intr = NULL; | |
d427e836 BZ |
126 | |
127 | hw->chipset = ide_generic; | |
29dd5975 | 128 | } |
1da177e4 LT |
129 | |
130 | /* | |
131 | * Probe for a Falcon IDE interface | |
132 | */ | |
133 | ||
ade2daf9 | 134 | static int __init falconide_init(void) |
1da177e4 | 135 | { |
48c3c107 | 136 | struct ide_host *host; |
c97c6aca | 137 | hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; |
8a69580e | 138 | int rc; |
1da177e4 | 139 | |
29dd5975 | 140 | if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE)) |
8a69580e | 141 | return -ENODEV; |
29dd5975 | 142 | |
c99c92c5 BZ |
143 | printk(KERN_INFO "ide: Falcon IDE controller\n"); |
144 | ||
cb5528ab BZ |
145 | if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) { |
146 | printk(KERN_ERR "%s: resources busy\n", DRV_NAME); | |
147 | return -EBUSY; | |
148 | } | |
149 | ||
29dd5975 | 150 | falconide_setup_ports(&hw); |
1da177e4 | 151 | |
48c3c107 | 152 | host = ide_host_alloc(&falconide_port_info, hws); |
8a69580e BZ |
153 | if (host == NULL) { |
154 | rc = -ENOMEM; | |
155 | goto err; | |
cbb010c1 | 156 | } |
ade2daf9 | 157 | |
e354c1d8 | 158 | falconide_get_lock(NULL, NULL); |
8a69580e | 159 | rc = ide_host_register(host, &falconide_port_info, hws); |
e354c1d8 | 160 | falconide_release_lock(); |
8a69580e BZ |
161 | |
162 | if (rc) | |
163 | goto err_free; | |
164 | ||
29dd5975 | 165 | return 0; |
8a69580e BZ |
166 | err_free: |
167 | ide_host_free(host); | |
168 | err: | |
169 | release_mem_region(ATA_HD_BASE, 0x40); | |
170 | return rc; | |
1da177e4 | 171 | } |
ade2daf9 BZ |
172 | |
173 | module_init(falconide_init); | |
0c5ec97b AB |
174 | |
175 | MODULE_LICENSE("GPL"); |