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/types.h>
44 #include <linux/kernel.h>
45 #include <linux/delay.h>
46 #include <linux/timer.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>
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
)
79 static inline u8
in_umc (char port
)
85 static void umc_set_speeds (u8 speeds
[])
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)));
94 for (i
= 3; i
>= 0; i
--) {
95 tmp
= (tmp
<< 2) | speedtab
[1][speeds
[i
]];
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
)
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");
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)
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");
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);
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
;
155 mate
->chipset
= ide_umc8672
;
156 mate
->pio_mask
= ATA_PIO4
;
157 mate
->set_pio_mode
= &umc_set_pio_mode
;
161 probe_hwif_init(hwif
);
162 probe_hwif_init(mate
);
164 ide_proc_register_port(hwif
);
165 ide_proc_register_port(mate
);
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)
181 if (umc8672_probe() == 0)
188 module_init(umc8672_init
);
191 MODULE_AUTHOR("Wolfram Podien");
192 MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
193 MODULE_LICENSE("GPL");