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>
57 #ifdef CONFIG_BLK_DEV_UMC8672_MODULE
59 # include "ide_modes.h"
62 # include "ide_modes.h"
63 #endif /* CONFIG_BLK_DEV_UMC8672_MODULE */
66 * Default speeds. These can be changed with "auto-tune" and/or hdparm.
68 #define UMC_DRIVE0 1 /* DOS measured drive speeds */
69 #define UMC_DRIVE1 1 /* 0 to 11 allowed */
70 #define UMC_DRIVE2 1 /* 11 = Fastest Speed */
71 #define UMC_DRIVE3 1 /* In case of crash reduce speed */
73 static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
74 static const u8 pio_to_umc [5] = {0,3,7,10,11}; /* rough guesses */
76 /* 0 1 2 3 4 5 6 7 8 9 10 11 */
77 static const u8 speedtab [3][12] = {
78 {0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
79 {0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
80 {0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}};
82 static void out_umc (char port,char wert)
88 static inline u8 in_umc (char port)
94 static void umc_set_speeds (u8 speeds[])
98 outb_p(0x5A,0x108); /* enable umc */
100 out_umc (0xd7,(speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4)));
101 out_umc (0xd6,(speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4)));
103 for (i = 3; i >= 0; i--) {
104 tmp = (tmp << 2) | speedtab[1][speeds[i]];
107 for (i = 0;i < 4; i++) {
108 out_umc (0xd0+i,speedtab[2][speeds[i]]);
109 out_umc (0xd8+i,speedtab[2][speeds[i]]);
111 outb_p(0xa5,0x108); /* disable umc */
113 printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
114 speeds[0], speeds[1], speeds[2], speeds[3]);
117 static void tune_umc (ide_drive_t *drive, u8 pio)
120 ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup;
122 pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
123 printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
124 drive->name, pio, pio_to_umc[pio]);
125 spin_lock_irqsave(&io_request_lock, flags);
126 if (hwgroup && hwgroup->handler != NULL) {
127 printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
129 current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
130 umc_set_speeds (current_speeds);
132 spin_unlock_irqrestore(&io_request_lock, flags);
135 int __init probe_umc8672 (void)
139 local_irq_save(flags);
140 if (!request_region(0x108, 2, "umc8672")) {
141 local_irq_restore(flags);
142 printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
145 outb_p(0x5A,0x108); /* enable umc */
146 if (in_umc (0xd5) != 0xa0) {
147 local_irq_restore(flags);
148 printk(KERN_ERR "umc8672: not found\n");
149 release_region(0x108, 2);
152 outb_p(0xa5,0x108); /* disable umc */
154 umc_set_speeds (current_speeds);
155 local_irq_restore(flags);
157 ide_hwifs[0].chipset = ide_umc8672;
158 ide_hwifs[1].chipset = ide_umc8672;
159 ide_hwifs[0].tuneproc = &tune_umc;
160 ide_hwifs[1].tuneproc = &tune_umc;
161 ide_hwifs[0].mate = &ide_hwifs[1];
162 ide_hwifs[1].mate = &ide_hwifs[0];
163 ide_hwifs[1].channel = 1;
165 #ifndef HWIF_PROBE_CLASSIC_METHOD
166 probe_hwif_init(&ide_hwifs[0]);
167 probe_hwif_init(&ide_hwifs[1]);
168 #endif /* HWIF_PROBE_CLASSIC_METHOD */
173 void __init umc8672_release (void)
177 local_irq_save(flags);
178 if (ide_hwifs[0].chipset != ide_umc8672 &&
179 ide_hwifs[1].chipset != ide_umc8672) {
180 local_irq_restore(flags);
184 ide_hwifs[0].chipset = ide_unknown;
185 ide_hwifs[1].chipset = ide_unknown;
186 ide_hwifs[0].tuneproc = NULL;
187 ide_hwifs[1].tuneproc = NULL;
188 ide_hwifs[0].mate = NULL;
189 ide_hwifs[1].mate = NULL;
190 ide_hwifs[0].channel = 0;
191 ide_hwifs[1].channel = 0;
193 outb_p(0xa5,0x108); /* disable umc */
195 release_region(0x108, 2);
196 local_irq_restore(flags);
203 * called by ide.c when parsing command line
206 void __init init_umc8672 (void)
209 printk(KERN_ERR "init_umc8672: umc8672 controller not found.\n");
214 MODULE_AUTHOR("Wolfram Podien");
215 MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
216 MODULE_LICENSE("GPL");
218 int __init umc8672_mod_init(void)
222 if (ide_hwifs[0].chipset != ide_umc8672 &&
223 ide_hwifs[1].chipset != ide_umc8672) {
229 module_init(umc8672_mod_init);
231 void __init umc8672_mod_exit(void)
235 module_exit(umc8672_mod_exit);