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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/legacy/umc8672.c Version 0.05 Jul 31, 1996 | |
3 | * | |
4 | * Copyright (C) 1995-1996 Linus Torvalds & author (see below) | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Principal Author/Maintainer: PODIEN@hml2.atlas.de (Wolfram Podien) | |
9 | * | |
10 | * This file provides support for the advanced features | |
11 | * of the UMC 8672 IDE interface. | |
12 | * | |
13 | * Version 0.01 Initial version, hacked out of ide.c, | |
14 | * and #include'd rather than compiled separately. | |
15 | * This will get cleaned up in a subsequent release. | |
16 | * | |
17 | * Version 0.02 now configs/compiles separate from ide.c -ml | |
18 | * Version 0.03 enhanced auto-tune, fix display bug | |
19 | * Version 0.05 replace sti() with restore_flags() -ml | |
20 | * add detection of possible race condition -ml | |
21 | */ | |
22 | ||
23 | /* | |
24 | * VLB Controller Support from | |
25 | * Wolfram Podien | |
26 | * Rohoefe 3 | |
27 | * D28832 Achim | |
28 | * Germany | |
29 | * | |
30 | * To enable UMC8672 support there must a lilo line like | |
31 | * append="ide0=umc8672"... | |
32 | * To set the speed according to the abilities of the hardware there must be a | |
33 | * line like | |
34 | * #define UMC_DRIVE0 11 | |
35 | * in the beginning of the driver, which sets the speed of drive 0 to 11 (there | |
36 | * are some lines present). 0 - 11 are allowed speed values. These values are | |
37 | * the results from the DOS speed test program supplied from UMC. 11 is the | |
38 | * highest speed (about PIO mode 3) | |
39 | */ | |
40 | #define REALLY_SLOW_IO /* some systems can safely undef this */ | |
41 | ||
42 | #include <linux/module.h> | |
1da177e4 LT |
43 | #include <linux/types.h> |
44 | #include <linux/kernel.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/mm.h> | |
48 | #include <linux/ioport.h> | |
49 | #include <linux/blkdev.h> | |
50 | #include <linux/hdreg.h> | |
51 | #include <linux/ide.h> | |
52 | #include <linux/init.h> | |
53 | ||
54 | #include <asm/io.h> | |
55 | ||
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}; | |
65 | static const u8 pio_to_umc [5] = {0,3,7,10,11}; /* rough guesses */ | |
66 | ||
67 | /* 0 1 2 3 4 5 6 7 8 9 10 11 */ | |
68 | static const u8 speedtab [3][12] = { | |
69 | {0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 }, | |
70 | {0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 }, | |
71 | {0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}}; | |
72 | ||
73 | static void out_umc (char port,char wert) | |
74 | { | |
75 | outb_p(port,0x108); | |
76 | outb_p(wert,0x109); | |
77 | } | |
78 | ||
79 | static inline u8 in_umc (char port) | |
80 | { | |
81 | outb_p(port,0x108); | |
82 | return inb_p(0x109); | |
83 | } | |
84 | ||
85 | static void umc_set_speeds (u8 speeds[]) | |
86 | { | |
87 | int i, tmp; | |
88 | ||
89 | outb_p(0x5A,0x108); /* enable umc */ | |
90 | ||
91 | out_umc (0xd7,(speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4))); | |
92 | out_umc (0xd6,(speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4))); | |
93 | tmp = 0; | |
94 | for (i = 3; i >= 0; i--) { | |
95 | tmp = (tmp << 2) | speedtab[1][speeds[i]]; | |
96 | } | |
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]]); | |
101 | } | |
102 | outb_p(0xa5,0x108); /* disable umc */ | |
103 | ||
104 | printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n", | |
105 | speeds[0], speeds[1], speeds[2], speeds[3]); | |
106 | } | |
107 | ||
108 | static void tune_umc (ide_drive_t *drive, u8 pio) | |
109 | { | |
110 | unsigned long flags; | |
111 | ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup; | |
112 | ||
113 | pio = ide_get_best_pio_mode(drive, pio, 4, NULL); | |
114 | printk("%s: setting umc8672 to PIO mode%d (speed %d)\n", | |
115 | drive->name, pio, pio_to_umc[pio]); | |
116 | spin_lock_irqsave(&ide_lock, flags); | |
117 | if (hwgroup && hwgroup->handler != NULL) { | |
118 | printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n"); | |
119 | } else { | |
120 | current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio]; | |
121 | umc_set_speeds (current_speeds); | |
122 | } | |
123 | spin_unlock_irqrestore(&ide_lock, flags); | |
124 | } | |
125 | ||
126 | static int __init umc8672_probe(void) | |
127 | { | |
128 | unsigned long flags; | |
129 | ide_hwif_t *hwif, *mate; | |
130 | ||
131 | if (!request_region(0x108, 2, "umc8672")) { | |
132 | printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n"); | |
133 | return 1; | |
134 | } | |
135 | local_irq_save(flags); | |
136 | outb_p(0x5A,0x108); /* enable umc */ | |
137 | if (in_umc (0xd5) != 0xa0) { | |
138 | local_irq_restore(flags); | |
139 | printk(KERN_ERR "umc8672: not found\n"); | |
140 | release_region(0x108, 2); | |
141 | return 1; | |
142 | } | |
143 | outb_p(0xa5,0x108); /* disable umc */ | |
144 | ||
145 | umc_set_speeds (current_speeds); | |
146 | local_irq_restore(flags); | |
147 | ||
148 | hwif = &ide_hwifs[0]; | |
149 | mate = &ide_hwifs[1]; | |
150 | ||
151 | hwif->chipset = ide_umc8672; | |
152 | hwif->tuneproc = &tune_umc; | |
153 | hwif->mate = mate; | |
154 | ||
155 | mate->chipset = ide_umc8672; | |
156 | mate->tuneproc = &tune_umc; | |
157 | mate->mate = hwif; | |
158 | mate->channel = 1; | |
159 | ||
160 | probe_hwif_init(hwif); | |
161 | probe_hwif_init(mate); | |
162 | ||
5cbf79cd BZ |
163 | ide_proc_register_port(hwif); |
164 | ide_proc_register_port(mate); | |
1da177e4 LT |
165 | |
166 | return 0; | |
167 | } | |
168 | ||
84913882 BZ |
169 | int probe_umc8672 = 0; |
170 | ||
171 | module_param_named(probe, probe_umc8672, bool, 0); | |
172 | MODULE_PARM_DESC(probe, "probe for UMC8672 chipset"); | |
173 | ||
1da177e4 LT |
174 | /* Can be called directly from ide.c. */ |
175 | int __init umc8672_init(void) | |
176 | { | |
84913882 BZ |
177 | if (probe_umc8672 == 0) |
178 | goto out; | |
179 | ||
180 | if (umc8672_probe() == 0) | |
181 | return 0;; | |
182 | out: | |
183 | return -ENODEV;; | |
1da177e4 LT |
184 | } |
185 | ||
186 | #ifdef MODULE | |
187 | module_init(umc8672_init); | |
188 | #endif | |
189 | ||
190 | MODULE_AUTHOR("Wolfram Podien"); | |
191 | MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset"); | |
192 | MODULE_LICENSE("GPL"); |