[mirror_ubuntu-artful-kernel.git] / drivers / ide / legacy / umc8672.c

/*
 *  Copyright (C) 1995-1996  Linus Torvalds & author (see below)
 */

/*
 *  Principal Author/Maintainer:  PODIEN@hml2.atlas.de (Wolfram Podien)
 *
 *  This file provides support for the advanced features
 *  of the UMC 8672 IDE interface.
 *
 *  Version 0.01	Initial version, hacked out of ide.c,
 *			and #include'd rather than compiled separately.
 *			This will get cleaned up in a subsequent release.
 *
 *  Version 0.02	now configs/compiles separate from ide.c  -ml
 *  Version 0.03	enhanced auto-tune, fix display bug
 *  Version 0.05	replace sti() with restore_flags()  -ml
 *			add detection of possible race condition  -ml
 */

/*
 * VLB Controller Support from 
 * Wolfram Podien
 * Rohoefe 3
 * D28832 Achim
 * Germany
 *
 * To enable UMC8672 support there must a lilo line like
 * append="ide0=umc8672"...
 * To set the speed according to the abilities of the hardware there must be a
 * line like
 * #define UMC_DRIVE0 11
 * in the beginning of the driver, which sets the speed of drive 0 to 11 (there
 * are some lines present). 0 - 11 are allowed speed values. These values are
 * the results from the DOS speed test program supplied from UMC. 11 is the 
 * highest speed (about PIO mode 3)
 */
#define REALLY_SLOW_IO		/* some systems can safely undef this */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>

#include <asm/io.h>

/*
 * Default speeds.  These can be changed with "auto-tune" and/or hdparm.
 */
#define UMC_DRIVE0      1              /* DOS measured drive speeds */
#define UMC_DRIVE1      1              /* 0 to 11 allowed */
#define UMC_DRIVE2      1              /* 11 = Fastest Speed */
#define UMC_DRIVE3      1              /* In case of crash reduce speed */

static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
static const u8 pio_to_umc [5] = {0,3,7,10,11};	/* rough guesses */

/*       0    1    2    3    4    5    6    7    8    9    10   11      */
static const u8 speedtab [3][12] = {
	{0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
	{0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
	{0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}};

static void out_umc (char port,char wert)
{
	outb_p(port,0x108);
	outb_p(wert,0x109);
}

static inline u8 in_umc (char port)
{
	outb_p(port,0x108);
	return inb_p(0x109);
}

static void umc_set_speeds (u8 speeds[])
{
	int i, tmp;

	outb_p(0x5A,0x108); /* enable umc */

	out_umc (0xd7,(speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4)));
	out_umc (0xd6,(speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4)));
	tmp = 0;
	for (i = 3; i >= 0; i--) {
		tmp = (tmp << 2) | speedtab[1][speeds[i]];
	}
	out_umc (0xdc,tmp);
	for (i = 0;i < 4; i++) {
		out_umc (0xd0+i,speedtab[2][speeds[i]]);
		out_umc (0xd8+i,speedtab[2][speeds[i]]);
	}
	outb_p(0xa5,0x108); /* disable umc */

	printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
		speeds[0], speeds[1], speeds[2], speeds[3]);
}

static void umc_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	unsigned long flags;
	ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup;

	printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
		drive->name, pio, pio_to_umc[pio]);
	spin_lock_irqsave(&ide_lock, flags);
	if (hwgroup && hwgroup->handler != NULL) {
		printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
	} else {
		current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
		umc_set_speeds (current_speeds);
	}
	spin_unlock_irqrestore(&ide_lock, flags);
}

static int __init umc8672_probe(void)
{
	ide_hwif_t *hwif, *mate;
	unsigned long flags;
	static u8 idx[4] = { 0, 1, 0xff, 0xff };

	if (!request_region(0x108, 2, "umc8672")) {
		printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
		return 1;
	}
	local_irq_save(flags);
	outb_p(0x5A,0x108); /* enable umc */
	if (in_umc (0xd5) != 0xa0) {
		local_irq_restore(flags);
		printk(KERN_ERR "umc8672: not found\n");
		release_region(0x108, 2);
		return 1;  
	}
	outb_p(0xa5,0x108); /* disable umc */

	umc_set_speeds (current_speeds);
	local_irq_restore(flags);

	hwif = &ide_hwifs[0];
	mate = &ide_hwifs[1];

	hwif->chipset = ide_umc8672;
	hwif->pio_mask = ATA_PIO4;
	hwif->set_pio_mode = &umc_set_pio_mode;
	hwif->mate = mate;

	mate->chipset = ide_umc8672;
	mate->pio_mask = ATA_PIO4;
	mate->set_pio_mode = &umc_set_pio_mode;
	mate->mate = hwif;
	mate->channel = 1;

	ide_device_add(idx);

	return 0;
}

int probe_umc8672 = 0;

module_param_named(probe, probe_umc8672, bool, 0);
MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");

static int __init umc8672_init(void)
{
	if (probe_umc8672 == 0)
		goto out;

	if (umc8672_probe() == 0)
		return 0;;
out:
	return -ENODEV;;
}

module_init(umc8672_init);

MODULE_AUTHOR("Wolfram Podien");
MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (C) 1995-1996 Linus Torvalds & author (see below)
	3	*/
	4
	5	/*
	6	* Principal Author/Maintainer: PODIEN@hml2.atlas.de (Wolfram Podien)
	7	*
	8	* This file provides support for the advanced features
	9	* of the UMC 8672 IDE interface.
	10	*
	11	* Version 0.01 Initial version, hacked out of ide.c,
	12	* and #include'd rather than compiled separately.
	13	* This will get cleaned up in a subsequent release.
	14	*
	15	* Version 0.02 now configs/compiles separate from ide.c -ml
	16	* Version 0.03 enhanced auto-tune, fix display bug
	17	* Version 0.05 replace sti() with restore_flags() -ml
	18	* add detection of possible race condition -ml
	19	*/
	20
	21	/*
	22	* VLB Controller Support from
	23	* Wolfram Podien
	24	* Rohoefe 3
	25	* D28832 Achim
	26	* Germany
	27	*
	28	* To enable UMC8672 support there must a lilo line like
	29	* append="ide0=umc8672"...
	30	* To set the speed according to the abilities of the hardware there must be a
	31	* line like
	32	* #define UMC_DRIVE0 11
	33	* in the beginning of the driver, which sets the speed of drive 0 to 11 (there
	34	* are some lines present). 0 - 11 are allowed speed values. These values are
	35	* the results from the DOS speed test program supplied from UMC. 11 is the
	36	* highest speed (about PIO mode 3)
	37	*/
	38	#define REALLY_SLOW_IO /* some systems can safely undef this */
	39
	40	#include <linux/module.h>
1da177e4 LT	41	#include <linux/types.h>
	42	#include <linux/kernel.h>
	43	#include <linux/delay.h>
	44	#include <linux/timer.h>
	45	#include <linux/mm.h>
	46	#include <linux/ioport.h>
	47	#include <linux/blkdev.h>
	48	#include <linux/hdreg.h>
	49	#include <linux/ide.h>
	50	#include <linux/init.h>
	51
	52	#include <asm/io.h>
	53
	54	/*
	55	* Default speeds. These can be changed with "auto-tune" and/or hdparm.
	56	*/
	57	#define UMC_DRIVE0 1 /* DOS measured drive speeds */
	58	#define UMC_DRIVE1 1 /* 0 to 11 allowed */
	59	#define UMC_DRIVE2 1 /* 11 = Fastest Speed */
	60	#define UMC_DRIVE3 1 /* In case of crash reduce speed */
	61
	62	static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
	63	static const u8 pio_to_umc [5] = {0,3,7,10,11}; /* rough guesses */
	64
	65	/* 0 1 2 3 4 5 6 7 8 9 10 11 */
	66	static const u8 speedtab [3][12] = {
	67	{0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
	68	{0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
	69	{0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}};
	70
	71	static void out_umc (char port,char wert)
	72	{
	73	outb_p(port,0x108);
	74	outb_p(wert,0x109);
	75	}
	76
	77	static inline u8 in_umc (char port)
	78	{
	79	outb_p(port,0x108);
	80	return inb_p(0x109);
	81	}
	82
	83	static void umc_set_speeds (u8 speeds[])
	84	{
	85	int i, tmp;
	86
	87	outb_p(0x5A,0x108); /* enable umc */
	88
	89	out_umc (0xd7,(speedtab[0][speeds[2]] \| (speedtab[0][speeds[3]]<<4)));
	90	out_umc (0xd6,(speedtab[0][speeds[0]] \| (speedtab[0][speeds[1]]<<4)));
	91	tmp = 0;
	92	for (i = 3; i >= 0; i--) {
	93	tmp = (tmp << 2) \| speedtab[1][speeds[i]];
	94	}
	95	out_umc (0xdc,tmp);
	96	for (i = 0;i < 4; i++) {
	97	out_umc (0xd0+i,speedtab[2][speeds[i]]);
	98	out_umc (0xd8+i,speedtab[2][speeds[i]]);
	99	}
	100	outb_p(0xa5,0x108); /* disable umc */
	101
	102	printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
	103	speeds[0], speeds[1], speeds[2], speeds[3]);
	104	}
105
26bcb879	106	static void umc_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4 LT	107	{
	108	unsigned long flags;
	109	ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup;
	110
1da177e4 LT	111	printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
	112	drive->name, pio, pio_to_umc[pio]);
	113	spin_lock_irqsave(&ide_lock, flags);
	114	if (hwgroup && hwgroup->handler != NULL) {
	115	printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
	116	} else {
	117	current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
	118	umc_set_speeds (current_speeds);
	119	}
	120	spin_unlock_irqrestore(&ide_lock, flags);
	121	}
	122
	123	static int __init umc8672_probe(void)
	124	{
1da177e4	125	ide_hwif_t hwif, mate;
8447d9d5 BZ	126	unsigned long flags;
8447d9d5 BZ	127	static u8 idx[4] = { 0, 1, 0xff, 0xff };
1da177e4 LT	128
	129	if (!request_region(0x108, 2, "umc8672")) {
	130	printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
	131	return 1;
	132	}
	133	local_irq_save(flags);
	134	outb_p(0x5A,0x108); /* enable umc */
	135	if (in_umc (0xd5) != 0xa0) {
	136	local_irq_restore(flags);
	137	printk(KERN_ERR "umc8672: not found\n");
	138	release_region(0x108, 2);
	139	return 1;
	140	}
	141	outb_p(0xa5,0x108); /* disable umc */
	142
	143	umc_set_speeds (current_speeds);
	144	local_irq_restore(flags);
	145
	146	hwif = &ide_hwifs[0];
	147	mate = &ide_hwifs[1];
	148
	149	hwif->chipset = ide_umc8672;
4099d143	150	hwif->pio_mask = ATA_PIO4;
26bcb879	151	hwif->set_pio_mode = &umc_set_pio_mode;
1da177e4 LT	152	hwif->mate = mate;
	153
	154	mate->chipset = ide_umc8672;
4099d143	155	mate->pio_mask = ATA_PIO4;
26bcb879	156	mate->set_pio_mode = &umc_set_pio_mode;
1da177e4 LT	157	mate->mate = hwif;
	158	mate->channel = 1;
	159
8447d9d5	160	ide_device_add(idx);
1da177e4 LT	161
	162	return 0;
	163	}
	164
84913882 BZ	165	int probe_umc8672 = 0;
	166
	167	module_param_named(probe, probe_umc8672, bool, 0);
	168	MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
	169
ade2daf9	170	static int __init umc8672_init(void)
1da177e4	171	{
84913882 BZ	172	if (probe_umc8672 == 0)
	173	goto out;
	174
	175	if (umc8672_probe() == 0)
	176	return 0;;
	177	out:
	178	return -ENODEV;;
1da177e4 LT	179	}
1da177e4 LT	180
1da177e4	181	module_init(umc8672_init);
1da177e4 LT	182
	183	MODULE_AUTHOR("Wolfram Podien");
	184	MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
	185	MODULE_LICENSE("GPL");