pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / ide / legacy / umc8672.c
blob1151c92dd5318dfc8681771143322f7d1e4e3480
1 /*
2 * linux/drivers/ide/legacy/umc8672.c Version 0.05 Jul 31, 1996
4 * Copyright (C) 1995-1996 Linus Torvalds & author (see below)
5 */
7 /*
8 * Principal Author/Maintainer: PODIEN@hml2.atlas.de (Wolfram Podien)
10 * This file provides support for the advanced features
11 * of the UMC 8672 IDE interface.
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.
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
24 * VLB Controller Support from
25 * Wolfram Podien
26 * Rohoefe 3
27 * D28832 Achim
28 * Germany
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)
40 #define REALLY_SLOW_IO /* some systems can safely undef this */
42 #include <linux/module.h>
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>
54 #include <asm/io.h>
57 * Default speeds. These can be changed with "auto-tune" and/or hdparm.
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 */
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 */
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}};
73 static void out_umc (char port,char wert)
75 outb_p(port,0x108);
76 outb_p(wert,0x109);
79 static inline u8 in_umc (char port)
81 outb_p(port,0x108);
82 return inb_p(0x109);
85 static void umc_set_speeds (u8 speeds[])
87 int i, tmp;
89 outb_p(0x5A,0x108); /* enable umc */
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]];
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]]);
102 outb_p(0xa5,0x108); /* disable umc */
104 printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
105 speeds[0], speeds[1], speeds[2], speeds[3]);
108 static void umc_set_pio_mode(ide_drive_t *drive, const u8 pio)
110 unsigned long flags;
111 ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup;
113 printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
114 drive->name, pio, pio_to_umc[pio]);
115 spin_lock_irqsave(&ide_lock, flags);
116 if (hwgroup && hwgroup->handler != NULL) {
117 printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
118 } else {
119 current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
120 umc_set_speeds (current_speeds);
122 spin_unlock_irqrestore(&ide_lock, flags);
125 static int __init umc8672_probe(void)
127 unsigned long flags;
128 ide_hwif_t *hwif, *mate;
130 if (!request_region(0x108, 2, "umc8672")) {
131 printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
132 return 1;
134 local_irq_save(flags);
135 outb_p(0x5A,0x108); /* enable umc */
136 if (in_umc (0xd5) != 0xa0) {
137 local_irq_restore(flags);
138 printk(KERN_ERR "umc8672: not found\n");
139 release_region(0x108, 2);
140 return 1;
142 outb_p(0xa5,0x108); /* disable umc */
144 umc_set_speeds (current_speeds);
145 local_irq_restore(flags);
147 hwif = &ide_hwifs[0];
148 mate = &ide_hwifs[1];
150 hwif->chipset = ide_umc8672;
151 hwif->pio_mask = ATA_PIO4;
152 hwif->set_pio_mode = &umc_set_pio_mode;
153 hwif->mate = mate;
155 mate->chipset = ide_umc8672;
156 mate->pio_mask = ATA_PIO4;
157 mate->set_pio_mode = &umc_set_pio_mode;
158 mate->mate = hwif;
159 mate->channel = 1;
161 probe_hwif_init(hwif);
162 probe_hwif_init(mate);
164 ide_proc_register_port(hwif);
165 ide_proc_register_port(mate);
167 return 0;
170 int probe_umc8672 = 0;
172 module_param_named(probe, probe_umc8672, bool, 0);
173 MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
175 /* Can be called directly from ide.c. */
176 int __init umc8672_init(void)
178 if (probe_umc8672 == 0)
179 goto out;
181 if (umc8672_probe() == 0)
182 return 0;;
183 out:
184 return -ENODEV;;
187 #ifdef MODULE
188 module_init(umc8672_init);
189 #endif
191 MODULE_AUTHOR("Wolfram Podien");
192 MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
193 MODULE_LICENSE("GPL");