2 * linux/drivers/ide/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/types.h>
43 #include <linux/kernel.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
47 #include <linux/ioport.h>
48 #include <linux/blkdev.h>
49 #include <linux/hdreg.h>
50 #include <linux/ide.h>
51 #include <linux/init.h>
55 #include "ide_modes.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 byte current_speeds
[4] = {UMC_DRIVE0
, UMC_DRIVE1
, UMC_DRIVE2
, UMC_DRIVE3
};
66 static const byte 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 byte 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 byte
in_umc (char port
)
86 static void umc_set_speeds (byte 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
--)
97 tmp
= (tmp
<< 2) | speedtab
[1][speeds
[i
]];
100 for (i
= 0;i
< 4; i
++)
102 out_umc (0xd0+i
,speedtab
[2][speeds
[i
]]);
103 out_umc (0xd8+i
,speedtab
[2][speeds
[i
]]);
105 outb_p (0xa5,0x108); /* disable umc */
107 printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
108 speeds
[0], speeds
[1], speeds
[2], speeds
[3]);
111 static void tune_umc (ide_drive_t
*drive
, byte pio
)
114 ide_hwgroup_t
*hwgroup
= ide_hwifs
[HWIF(drive
)->index
^1].hwgroup
;
116 pio
= ide_get_best_pio_mode(drive
, pio
, 4, NULL
);
117 printk("%s: setting umc8672 to PIO mode%d (speed %d)\n", drive
->name
, pio
, pio_to_umc
[pio
]);
118 save_flags(flags
); /* all CPUs */
119 cli(); /* all CPUs */
120 if (hwgroup
&& hwgroup
->handler
!= NULL
) {
121 printk("umc8672: other interface is busy: exiting tune_umc()\n");
123 current_speeds
[drive
->name
[2] - 'a'] = pio_to_umc
[pio
];
124 umc_set_speeds (current_speeds
);
126 restore_flags(flags
); /* all CPUs */
129 void __init
init_umc8672 (void) /* called from ide.c */
133 __save_flags(flags
); /* local CPU only */
134 __cli(); /* local CPU only */
135 if (check_region(0x108, 2)) {
136 __restore_flags(flags
);
137 printk("\numc8672: PORTS 0x108-0x109 ALREADY IN USE\n");
140 outb_p (0x5A,0x108); /* enable umc */
141 if (in_umc (0xd5) != 0xa0)
143 __restore_flags(flags
); /* local CPU only */
144 printk ("umc8672: not found\n");
147 outb_p (0xa5,0x108); /* disable umc */
149 umc_set_speeds (current_speeds
);
150 __restore_flags(flags
); /* local CPU only */
152 request_region(0x108, 2, "umc8672");
153 ide_hwifs
[0].chipset
= ide_umc8672
;
154 ide_hwifs
[1].chipset
= ide_umc8672
;
155 ide_hwifs
[0].tuneproc
= &tune_umc
;
156 ide_hwifs
[1].tuneproc
= &tune_umc
;
157 ide_hwifs
[0].mate
= &ide_hwifs
[1];
158 ide_hwifs
[1].mate
= &ide_hwifs
[0];
159 ide_hwifs
[1].channel
= 1;