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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1996 Linus Torvalds & author (see below) |
3 | */ | |
4 | ||
1da177e4 | 5 | #include <linux/module.h> |
1da177e4 LT |
6 | #include <linux/types.h> |
7 | #include <linux/kernel.h> | |
8 | #include <linux/delay.h> | |
9 | #include <linux/timer.h> | |
10 | #include <linux/mm.h> | |
11 | #include <linux/ioport.h> | |
12 | #include <linux/blkdev.h> | |
1da177e4 LT |
13 | #include <linux/ide.h> |
14 | #include <linux/init.h> | |
15 | ||
16 | #include <asm/io.h> | |
17 | ||
d92f1a28 BZ |
18 | #define DRV_NAME "dtc2278" |
19 | ||
1da177e4 LT |
20 | /* |
21 | * Changing this #undef to #define may solve start up problems in some systems. | |
22 | */ | |
23 | #undef ALWAYS_SET_DTC2278_PIO_MODE | |
24 | ||
25 | /* | |
26 | * From: andy@cercle.cts.com (Dyan Wile) | |
27 | * | |
28 | * Below is a patch for DTC-2278 - alike software-programmable controllers | |
29 | * The code enables the secondary IDE controller and the PIO4 (3?) timings on | |
30 | * the primary (EIDE). You may probably have to enable the 32-bit support to | |
31 | * get the full speed. You better get the disk interrupts disabled ( hdparm -u0 | |
32 | * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my | |
33 | * filesystem corrupted with -u1, but under heavy disk load only :-) | |
34 | * | |
35 | * This card is now forced to use the "serialize" feature, | |
36 | * and irq-unmasking is disallowed. If io_32bit is enabled, | |
37 | * it must be done for BOTH drives on each interface. | |
38 | * | |
39 | * This code was written for the DTC2278E, but might work with any of these: | |
40 | * | |
41 | * DTC2278S has only a single IDE interface. | |
42 | * DTC2278D has two IDE interfaces and is otherwise identical to the S version. | |
43 | * DTC2278E also has serial ports and a printer port | |
44 | * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu> | |
45 | * | |
46 | * There may be a fourth controller type. The S and D versions use the | |
47 | * Winbond chip, and I think the E version does also. | |
48 | * | |
49 | */ | |
50 | ||
51 | static void sub22 (char b, char c) | |
52 | { | |
53 | int i; | |
54 | ||
55 | for(i = 0; i < 3; ++i) { | |
56 | inb(0x3f6); | |
57 | outb_p(b,0xb0); | |
58 | inb(0x3f6); | |
59 | outb_p(c,0xb4); | |
60 | inb(0x3f6); | |
61 | if(inb(0xb4) == c) { | |
62 | outb_p(7,0xb0); | |
63 | inb(0x3f6); | |
64 | return; /* success */ | |
65 | } | |
66 | } | |
67 | } | |
68 | ||
a34a8751 BZ |
69 | static DEFINE_SPINLOCK(dtc2278_lock); |
70 | ||
26bcb879 | 71 | static void dtc2278_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
72 | { |
73 | unsigned long flags; | |
74 | ||
1da177e4 | 75 | if (pio >= 3) { |
a34a8751 | 76 | spin_lock_irqsave(&dtc2278_lock, flags); |
1da177e4 LT |
77 | /* |
78 | * This enables PIO mode4 (3?) on the first interface | |
79 | */ | |
80 | sub22(1,0xc3); | |
81 | sub22(0,0xa0); | |
a34a8751 | 82 | spin_unlock_irqrestore(&dtc2278_lock, flags); |
1da177e4 LT |
83 | } else { |
84 | /* we don't know how to set it back again.. */ | |
d3bad45f AC |
85 | /* Actually we do - there is a data sheet available for the |
86 | Winbond but does anyone actually care */ | |
1da177e4 | 87 | } |
1da177e4 LT |
88 | } |
89 | ||
ac95beed BZ |
90 | static const struct ide_port_ops dtc2278_port_ops = { |
91 | .set_pio_mode = dtc2278_set_pio_mode, | |
92 | }; | |
93 | ||
c413b9b9 | 94 | static const struct ide_port_info dtc2278_port_info __initdata = { |
d92f1a28 | 95 | .name = DRV_NAME, |
c413b9b9 | 96 | .chipset = ide_dtc2278, |
ac95beed | 97 | .port_ops = &dtc2278_port_ops, |
c413b9b9 | 98 | .host_flags = IDE_HFLAG_SERIALIZE | |
807b90d0 | 99 | IDE_HFLAG_NO_UNMASK_IRQS | |
c413b9b9 | 100 | IDE_HFLAG_IO_32BIT | |
807b90d0 BZ |
101 | /* disallow ->io_32bit changes */ |
102 | IDE_HFLAG_NO_IO_32BIT | | |
0d28ec7f | 103 | IDE_HFLAG_NO_DMA, |
c413b9b9 BZ |
104 | .pio_mask = ATA_PIO4, |
105 | }; | |
106 | ||
84913882 | 107 | static int __init dtc2278_probe(void) |
1da177e4 LT |
108 | { |
109 | unsigned long flags; | |
1da177e4 | 110 | |
1da177e4 LT |
111 | local_irq_save(flags); |
112 | /* | |
113 | * This enables the second interface | |
114 | */ | |
115 | outb_p(4,0xb0); | |
116 | inb(0x3f6); | |
117 | outb_p(0x20,0xb4); | |
118 | inb(0x3f6); | |
119 | #ifdef ALWAYS_SET_DTC2278_PIO_MODE | |
120 | /* | |
121 | * This enables PIO mode4 (3?) on the first interface | |
122 | * and may solve start-up problems for some people. | |
123 | */ | |
124 | sub22(1,0xc3); | |
125 | sub22(0,0xa0); | |
126 | #endif | |
127 | local_irq_restore(flags); | |
128 | ||
0bfeee7d | 129 | return ide_legacy_device_add(&dtc2278_port_info, 0); |
1da177e4 LT |
130 | } |
131 | ||
ef87f8d0 | 132 | static int probe_dtc2278; |
84913882 BZ |
133 | |
134 | module_param_named(probe, probe_dtc2278, bool, 0); | |
135 | MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets"); | |
136 | ||
ade2daf9 | 137 | static int __init dtc2278_init(void) |
1da177e4 | 138 | { |
84913882 BZ |
139 | if (probe_dtc2278 == 0) |
140 | return -ENODEV; | |
141 | ||
142 | if (dtc2278_probe()) { | |
1da177e4 LT |
143 | printk(KERN_ERR "dtc2278: ide interfaces already in use!\n"); |
144 | return -EBUSY; | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
1da177e4 | 149 | module_init(dtc2278_init); |
1da177e4 LT |
150 | |
151 | MODULE_AUTHOR("See Local File"); | |
152 | MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets"); | |
153 | MODULE_LICENSE("GPL"); |