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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (C) 1995-1996 Linus Torvalds & author (see below) |
4 | */ | |
5 | ||
6 | /* | |
7 | * Principal Author/Maintainer: PODIEN@hml2.atlas.de (Wolfram Podien) | |
8 | * | |
9 | * This file provides support for the advanced features | |
10 | * of the UMC 8672 IDE interface. | |
11 | * | |
12 | * Version 0.01 Initial version, hacked out of ide.c, | |
13 | * and #include'd rather than compiled separately. | |
14 | * This will get cleaned up in a subsequent release. | |
15 | * | |
16 | * Version 0.02 now configs/compiles separate from ide.c -ml | |
17 | * Version 0.03 enhanced auto-tune, fix display bug | |
18 | * Version 0.05 replace sti() with restore_flags() -ml | |
19 | * add detection of possible race condition -ml | |
20 | */ | |
21 | ||
22 | /* | |
0905bc94 | 23 | * VLB Controller Support from |
1da177e4 LT |
24 | * Wolfram Podien |
25 | * Rohoefe 3 | |
26 | * D28832 Achim | |
27 | * Germany | |
28 | * | |
29 | * To enable UMC8672 support there must a lilo line like | |
30 | * append="ide0=umc8672"... | |
31 | * To set the speed according to the abilities of the hardware there must be a | |
32 | * line like | |
33 | * #define UMC_DRIVE0 11 | |
34 | * in the beginning of the driver, which sets the speed of drive 0 to 11 (there | |
35 | * are some lines present). 0 - 11 are allowed speed values. These values are | |
0905bc94 | 36 | * the results from the DOS speed test program supplied from UMC. 11 is the |
1da177e4 LT |
37 | * highest speed (about PIO mode 3) |
38 | */ | |
39 | #define REALLY_SLOW_IO /* some systems can safely undef this */ | |
40 | ||
41 | #include <linux/module.h> | |
1da177e4 LT |
42 | #include <linux/types.h> |
43 | #include <linux/kernel.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/timer.h> | |
46 | #include <linux/mm.h> | |
47 | #include <linux/ioport.h> | |
48 | #include <linux/blkdev.h> | |
1da177e4 LT |
49 | #include <linux/ide.h> |
50 | #include <linux/init.h> | |
51 | ||
52 | #include <asm/io.h> | |
53 | ||
d92f1a28 BZ |
54 | #define DRV_NAME "umc8672" |
55 | ||
1da177e4 LT |
56 | /* |
57 | * Default speeds. These can be changed with "auto-tune" and/or hdparm. | |
58 | */ | |
59 | #define UMC_DRIVE0 1 /* DOS measured drive speeds */ | |
60 | #define UMC_DRIVE1 1 /* 0 to 11 allowed */ | |
61 | #define UMC_DRIVE2 1 /* 11 = Fastest Speed */ | |
62 | #define UMC_DRIVE3 1 /* In case of crash reduce speed */ | |
63 | ||
64 | static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3}; | |
0905bc94 | 65 | static const u8 pio_to_umc [5] = {0, 3, 7, 10, 11}; /* rough guesses */ |
1da177e4 LT |
66 | |
67 | /* 0 1 2 3 4 5 6 7 8 9 10 11 */ | |
68 | static const u8 speedtab [3][12] = { | |
0905bc94 PC |
69 | {0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1}, |
70 | {0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1}, | |
71 | {0xff, 0xcb, 0xc0, 0x58, 0x36, 0x33, 0x23, 0x22, 0x21, 0x11, 0x10, 0x0} | |
72 | }; | |
1da177e4 | 73 | |
0905bc94 | 74 | static void out_umc(char port, char wert) |
1da177e4 | 75 | { |
0905bc94 PC |
76 | outb_p(port, 0x108); |
77 | outb_p(wert, 0x109); | |
1da177e4 LT |
78 | } |
79 | ||
0905bc94 | 80 | static inline u8 in_umc(char port) |
1da177e4 | 81 | { |
0905bc94 | 82 | outb_p(port, 0x108); |
1da177e4 LT |
83 | return inb_p(0x109); |
84 | } | |
85 | ||
0905bc94 | 86 | static void umc_set_speeds(u8 speeds[]) |
1da177e4 LT |
87 | { |
88 | int i, tmp; | |
89 | ||
0905bc94 | 90 | outb_p(0x5A, 0x108); /* enable umc */ |
1da177e4 | 91 | |
0905bc94 PC |
92 | out_umc(0xd7, (speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4))); |
93 | out_umc(0xd6, (speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4))); | |
1da177e4 | 94 | tmp = 0; |
0905bc94 | 95 | for (i = 3; i >= 0; i--) |
1da177e4 | 96 | tmp = (tmp << 2) | speedtab[1][speeds[i]]; |
0905bc94 PC |
97 | out_umc(0xdc, tmp); |
98 | for (i = 0; i < 4; i++) { | |
99 | out_umc(0xd0 + i, speedtab[2][speeds[i]]); | |
100 | out_umc(0xd8 + i, speedtab[2][speeds[i]]); | |
1da177e4 | 101 | } |
0905bc94 | 102 | outb_p(0xa5, 0x108); /* disable umc */ |
1da177e4 | 103 | |
0905bc94 | 104 | printk("umc8672: drive speeds [0 to 11]: %d %d %d %d\n", |
1da177e4 LT |
105 | speeds[0], speeds[1], speeds[2], speeds[3]); |
106 | } | |
107 | ||
e085b3ca | 108 | static void umc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
1da177e4 | 109 | { |
e085b3ca | 110 | ide_hwif_t *mate = hwif->mate; |
2a2ca6a9 | 111 | unsigned long uninitialized_var(flags); |
e085b3ca | 112 | const u8 pio = drive->pio_mode - XFER_PIO_0; |
1da177e4 | 113 | |
1da177e4 LT |
114 | printk("%s: setting umc8672 to PIO mode%d (speed %d)\n", |
115 | drive->name, pio, pio_to_umc[pio]); | |
b65fac32 BZ |
116 | if (mate) |
117 | spin_lock_irqsave(&mate->lock, flags); | |
118 | if (mate && mate->handler) { | |
1da177e4 LT |
119 | printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n"); |
120 | } else { | |
121 | current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio]; | |
0905bc94 | 122 | umc_set_speeds(current_speeds); |
1da177e4 | 123 | } |
b65fac32 BZ |
124 | if (mate) |
125 | spin_unlock_irqrestore(&mate->lock, flags); | |
1da177e4 LT |
126 | } |
127 | ||
ac95beed BZ |
128 | static const struct ide_port_ops umc8672_port_ops = { |
129 | .set_pio_mode = umc_set_pio_mode, | |
130 | }; | |
131 | ||
e6b53703 | 132 | static const struct ide_port_info umc8672_port_info __initconst = { |
d92f1a28 | 133 | .name = DRV_NAME, |
c413b9b9 | 134 | .chipset = ide_umc8672, |
ac95beed | 135 | .port_ops = &umc8672_port_ops, |
0d28ec7f | 136 | .host_flags = IDE_HFLAG_NO_DMA, |
c413b9b9 BZ |
137 | .pio_mask = ATA_PIO4, |
138 | }; | |
139 | ||
1da177e4 LT |
140 | static int __init umc8672_probe(void) |
141 | { | |
8447d9d5 | 142 | unsigned long flags; |
1da177e4 LT |
143 | |
144 | if (!request_region(0x108, 2, "umc8672")) { | |
145 | printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n"); | |
146 | return 1; | |
147 | } | |
148 | local_irq_save(flags); | |
0905bc94 | 149 | outb_p(0x5A, 0x108); /* enable umc */ |
1da177e4 LT |
150 | if (in_umc (0xd5) != 0xa0) { |
151 | local_irq_restore(flags); | |
152 | printk(KERN_ERR "umc8672: not found\n"); | |
153 | release_region(0x108, 2); | |
0905bc94 | 154 | return 1; |
1da177e4 | 155 | } |
0905bc94 | 156 | outb_p(0xa5, 0x108); /* disable umc */ |
1da177e4 | 157 | |
0905bc94 | 158 | umc_set_speeds(current_speeds); |
1da177e4 LT |
159 | local_irq_restore(flags); |
160 | ||
0bfeee7d | 161 | return ide_legacy_device_add(&umc8672_port_info, 0); |
1da177e4 LT |
162 | } |
163 | ||
90ab5ee9 | 164 | static bool probe_umc8672; |
84913882 BZ |
165 | |
166 | module_param_named(probe, probe_umc8672, bool, 0); | |
167 | MODULE_PARM_DESC(probe, "probe for UMC8672 chipset"); | |
168 | ||
ade2daf9 | 169 | static int __init umc8672_init(void) |
1da177e4 | 170 | { |
84913882 BZ |
171 | if (probe_umc8672 == 0) |
172 | goto out; | |
173 | ||
174 | if (umc8672_probe() == 0) | |
a419aef8 | 175 | return 0; |
84913882 | 176 | out: |
a419aef8 | 177 | return -ENODEV; |
1da177e4 LT |
178 | } |
179 | ||
1da177e4 | 180 | module_init(umc8672_init); |
1da177e4 LT |
181 | |
182 | MODULE_AUTHOR("Wolfram Podien"); | |
183 | MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset"); | |
184 | MODULE_LICENSE("GPL"); |