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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> | |
13 | #include <linux/hdreg.h> | |
14 | #include <linux/ide.h> | |
15 | #include <linux/init.h> | |
16 | ||
17 | #include <asm/io.h> | |
18 | ||
19 | /* | |
20 | * Changing this #undef to #define may solve start up problems in some systems. | |
21 | */ | |
22 | #undef ALWAYS_SET_DTC2278_PIO_MODE | |
23 | ||
24 | /* | |
25 | * From: andy@cercle.cts.com (Dyan Wile) | |
26 | * | |
27 | * Below is a patch for DTC-2278 - alike software-programmable controllers | |
28 | * The code enables the secondary IDE controller and the PIO4 (3?) timings on | |
29 | * the primary (EIDE). You may probably have to enable the 32-bit support to | |
30 | * get the full speed. You better get the disk interrupts disabled ( hdparm -u0 | |
31 | * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my | |
32 | * filesystem corrupted with -u1, but under heavy disk load only :-) | |
33 | * | |
34 | * This card is now forced to use the "serialize" feature, | |
35 | * and irq-unmasking is disallowed. If io_32bit is enabled, | |
36 | * it must be done for BOTH drives on each interface. | |
37 | * | |
38 | * This code was written for the DTC2278E, but might work with any of these: | |
39 | * | |
40 | * DTC2278S has only a single IDE interface. | |
41 | * DTC2278D has two IDE interfaces and is otherwise identical to the S version. | |
42 | * DTC2278E also has serial ports and a printer port | |
43 | * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu> | |
44 | * | |
45 | * There may be a fourth controller type. The S and D versions use the | |
46 | * Winbond chip, and I think the E version does also. | |
47 | * | |
48 | */ | |
49 | ||
50 | static void sub22 (char b, char c) | |
51 | { | |
52 | int i; | |
53 | ||
54 | for(i = 0; i < 3; ++i) { | |
55 | inb(0x3f6); | |
56 | outb_p(b,0xb0); | |
57 | inb(0x3f6); | |
58 | outb_p(c,0xb4); | |
59 | inb(0x3f6); | |
60 | if(inb(0xb4) == c) { | |
61 | outb_p(7,0xb0); | |
62 | inb(0x3f6); | |
63 | return; /* success */ | |
64 | } | |
65 | } | |
66 | } | |
67 | ||
a34a8751 BZ |
68 | static DEFINE_SPINLOCK(dtc2278_lock); |
69 | ||
26bcb879 | 70 | static void dtc2278_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
71 | { |
72 | unsigned long flags; | |
73 | ||
1da177e4 | 74 | if (pio >= 3) { |
a34a8751 | 75 | spin_lock_irqsave(&dtc2278_lock, flags); |
1da177e4 LT |
76 | /* |
77 | * This enables PIO mode4 (3?) on the first interface | |
78 | */ | |
79 | sub22(1,0xc3); | |
80 | sub22(0,0xa0); | |
a34a8751 | 81 | spin_unlock_irqrestore(&dtc2278_lock, flags); |
1da177e4 LT |
82 | } else { |
83 | /* we don't know how to set it back again.. */ | |
d3bad45f AC |
84 | /* Actually we do - there is a data sheet available for the |
85 | Winbond but does anyone actually care */ | |
1da177e4 | 86 | } |
1da177e4 LT |
87 | } |
88 | ||
84913882 | 89 | static int __init dtc2278_probe(void) |
1da177e4 LT |
90 | { |
91 | unsigned long flags; | |
92 | ide_hwif_t *hwif, *mate; | |
8447d9d5 | 93 | static u8 idx[4] = { 0, 1, 0xff, 0xff }; |
1da177e4 LT |
94 | |
95 | hwif = &ide_hwifs[0]; | |
96 | mate = &ide_hwifs[1]; | |
97 | ||
98 | if (hwif->chipset != ide_unknown || mate->chipset != ide_unknown) | |
99 | return 1; | |
100 | ||
101 | local_irq_save(flags); | |
102 | /* | |
103 | * This enables the second interface | |
104 | */ | |
105 | outb_p(4,0xb0); | |
106 | inb(0x3f6); | |
107 | outb_p(0x20,0xb4); | |
108 | inb(0x3f6); | |
109 | #ifdef ALWAYS_SET_DTC2278_PIO_MODE | |
110 | /* | |
111 | * This enables PIO mode4 (3?) on the first interface | |
112 | * and may solve start-up problems for some people. | |
113 | */ | |
114 | sub22(1,0xc3); | |
115 | sub22(0,0xa0); | |
116 | #endif | |
117 | local_irq_restore(flags); | |
118 | ||
119 | hwif->serialized = 1; | |
36e9dc46 | 120 | hwif->no_io_32bit = 1; /* disallow ->io_32bit changes */ |
1da177e4 | 121 | hwif->chipset = ide_dtc2278; |
4099d143 | 122 | hwif->pio_mask = ATA_PIO4; |
26bcb879 | 123 | hwif->set_pio_mode = &dtc2278_set_pio_mode; |
1da177e4 LT |
124 | hwif->drives[0].no_unmask = 1; |
125 | hwif->drives[1].no_unmask = 1; | |
36e9dc46 BZ |
126 | hwif->drives[0].io_32bit = 1; |
127 | hwif->drives[1].io_32bit = 1; | |
1da177e4 LT |
128 | hwif->mate = mate; |
129 | ||
130 | mate->serialized = 1; | |
36e9dc46 | 131 | mate->no_io_32bit = 1; |
1da177e4 | 132 | mate->chipset = ide_dtc2278; |
691da768 | 133 | mate->pio_mask = ATA_PIO4; |
1da177e4 LT |
134 | mate->drives[0].no_unmask = 1; |
135 | mate->drives[1].no_unmask = 1; | |
36e9dc46 BZ |
136 | mate->drives[0].io_32bit = 1; |
137 | mate->drives[1].io_32bit = 1; | |
1da177e4 LT |
138 | mate->mate = hwif; |
139 | mate->channel = 1; | |
140 | ||
8447d9d5 | 141 | ide_device_add(idx); |
1da177e4 LT |
142 | |
143 | return 0; | |
144 | } | |
145 | ||
84913882 BZ |
146 | int probe_dtc2278 = 0; |
147 | ||
148 | module_param_named(probe, probe_dtc2278, bool, 0); | |
149 | MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets"); | |
150 | ||
ade2daf9 | 151 | static int __init dtc2278_init(void) |
1da177e4 | 152 | { |
84913882 BZ |
153 | if (probe_dtc2278 == 0) |
154 | return -ENODEV; | |
155 | ||
156 | if (dtc2278_probe()) { | |
1da177e4 LT |
157 | printk(KERN_ERR "dtc2278: ide interfaces already in use!\n"); |
158 | return -EBUSY; | |
159 | } | |
160 | return 0; | |
161 | } | |
162 | ||
1da177e4 | 163 | module_init(dtc2278_init); |
1da177e4 LT |
164 | |
165 | MODULE_AUTHOR("See Local File"); | |
166 | MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets"); | |
167 | MODULE_LICENSE("GPL"); |