2 * linux/drivers/ide/legacy/umc8672.c Version 0.05 Jul 31, 1996
4 * Copyright (C) 1995-1996 Linus Torvalds & author (see below)
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
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
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/config.h>
44 #include <linux/types.h>
45 #include <linux/kernel.h>
46 #include <linux/delay.h>
47 #include <linux/timer.h>
49 #include <linux/ioport.h>
50 #include <linux/blkdev.h>
51 #include <linux/hdreg.h>
52 #include <linux/ide.h>
53 #include <linux/init.h>
58 * Default speeds. These can be changed with "auto-tune" and/or hdparm.
60 #define UMC_DRIVE0 1 /* DOS measured drive speeds */
61 #define UMC_DRIVE1 1 /* 0 to 11 allowed */
62 #define UMC_DRIVE2 1 /* 11 = Fastest Speed */
63 #define UMC_DRIVE3 1 /* In case of crash reduce speed */
65 static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
66 static const u8 pio_to_umc [5] = {0,3,7,10,11}; /* rough guesses */
68 /* 0 1 2 3 4 5 6 7 8 9 10 11 */
69 static const u8 speedtab [3][12] = {
70 {0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
71 {0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
72 {0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}};
74 static void out_umc (char port,char wert)
80 static inline u8 in_umc (char port)
86 static void umc_set_speeds (u8 speeds[])
90 outb_p(0x5A,0x108); /* enable umc */
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)));
95 for (i = 3; i >= 0; i--) {
96 tmp = (tmp << 2) | speedtab[1][speeds[i]];
99 for (i = 0;i < 4; i++) {
100 out_umc (0xd0+i,speedtab[2][speeds[i]]);
101 out_umc (0xd8+i,speedtab[2][speeds[i]]);
103 outb_p(0xa5,0x108); /* disable umc */
105 printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
106 speeds[0], speeds[1], speeds[2], speeds[3]);
109 static void tune_umc (ide_drive_t *drive, u8 pio)
112 ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup;
114 pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
115 printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
116 drive->name, pio, pio_to_umc[pio]);
117 spin_lock_irqsave(&ide_lock, flags);
118 if (hwgroup && hwgroup->handler != NULL) {
119 printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
121 current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
122 umc_set_speeds (current_speeds);
124 spin_unlock_irqrestore(&ide_lock, flags);
127 static int __init umc8672_probe(void)
130 ide_hwif_t *hwif, *mate;
132 if (!request_region(0x108, 2, "umc8672")) {
133 printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
136 local_irq_save(flags);
137 outb_p(0x5A,0x108); /* enable umc */
138 if (in_umc (0xd5) != 0xa0) {
139 local_irq_restore(flags);
140 printk(KERN_ERR "umc8672: not found\n");
141 release_region(0x108, 2);
144 outb_p(0xa5,0x108); /* disable umc */
146 umc_set_speeds (current_speeds);
147 local_irq_restore(flags);
149 hwif = &ide_hwifs[0];
150 mate = &ide_hwifs[1];
152 hwif->chipset = ide_umc8672;
153 hwif->tuneproc = &tune_umc;
156 mate->chipset = ide_umc8672;
157 mate->tuneproc = &tune_umc;
161 probe_hwif_init(hwif);
162 probe_hwif_init(mate);
164 create_proc_ide_interfaces();
169 /* Can be called directly from ide.c. */
170 int __init umc8672_init(void)
178 module_init(umc8672_init);
181 MODULE_AUTHOR("Wolfram Podien");
182 MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
183 MODULE_LICENSE("GPL");