[mirror_ubuntu-jammy-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] = {
	{0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
	{0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 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)
{
	ide_hwif_t *hwif = drive->hwif;
	unsigned long flags;

	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 (hwif->mate && hwif->mate->hwgroup->handler) {
		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 const struct ide_port_info umc8672_port_info __initdata = {
	.chipset		= ide_umc8672,
	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
	.pio_mask		= ATA_PIO4,
};

static int __init umc8672_probe(void)
{
	ide_hwif_t *hwif, *mate;
	unsigned long flags;
	static u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
	hw_regs_t hw[2];

	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);

	memset(&hw, 0, sizeof(hw));

	ide_std_init_ports(&hw[0], 0x1f0, 0x3f6);
	hw[0].irq = 14;

	ide_std_init_ports(&hw[1], 0x170, 0x376);
	hw[1].irq = 15;

	hwif = ide_find_port();
	if (hwif) {
		ide_init_port_hw(hwif, &hw[0]);
		hwif->set_pio_mode = umc_set_pio_mode;
		idx[0] = hwif->index;
	}

	mate = ide_find_port();
	if (mate) {
		ide_init_port_hw(mate, &hw[1]);
		mate->set_pio_mode = umc_set_pio_mode;
		idx[1] = mate->index;
	}

	ide_device_add(idx, &umc8672_port_info);

	return 0;
}

int probe_umc8672;

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	/*
0905bc94	22	* VLB Controller Support from
1da177e4 LT	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
0905bc94	35	* the results from the DOS speed test program supplied from UMC. 11 is the
1da177e4 LT	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};
0905bc94	63	static const u8 pio_to_umc [5] = {0, 3, 7, 10, 11}; /* rough guesses */
1da177e4 LT	64
	65	/* 0 1 2 3 4 5 6 7 8 9 10 11 */
	66	static const u8 speedtab [3][12] = {
0905bc94 PC	67	{0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
	68	{0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
	69	{0xff, 0xcb, 0xc0, 0x58, 0x36, 0x33, 0x23, 0x22, 0x21, 0x11, 0x10, 0x0}
	70	};
1da177e4	71
0905bc94	72	static void out_umc(char port, char wert)
1da177e4	73	{
0905bc94 PC	74	outb_p(port, 0x108);
0905bc94 PC	75	outb_p(wert, 0x109);
1da177e4 LT	76	}
1da177e4 LT	77
0905bc94	78	static inline u8 in_umc(char port)
1da177e4	79	{
0905bc94	80	outb_p(port, 0x108);
1da177e4 LT	81	return inb_p(0x109);
	82	}
	83
0905bc94	84	static void umc_set_speeds(u8 speeds[])
1da177e4 LT	85	{
	86	int i, tmp;
	87
0905bc94	88	outb_p(0x5A, 0x108); /* enable umc */
1da177e4	89
0905bc94 PC	90	out_umc(0xd7, (speedtab[0][speeds[2]] \| (speedtab[0][speeds[3]]<<4)));
0905bc94 PC	91	out_umc(0xd6, (speedtab[0][speeds[0]] \| (speedtab[0][speeds[1]]<<4)));
1da177e4	92	tmp = 0;
0905bc94	93	for (i = 3; i >= 0; i--)
1da177e4	94	tmp = (tmp << 2) \| speedtab[1][speeds[i]];
0905bc94 PC	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]]);
1da177e4	99	}
0905bc94	100	outb_p(0xa5, 0x108); /* disable umc */
1da177e4	101
0905bc94	102	printk("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
1da177e4 LT	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	107	{
d147e7d8	108	ide_hwif_t *hwif = drive->hwif;
1da177e4	109	unsigned long flags;
1da177e4	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);
d147e7d8	114	if (hwif->mate && hwif->mate->hwgroup->handler) {
1da177e4 LT	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];
0905bc94	118	umc_set_speeds(current_speeds);
1da177e4 LT	119	}
	120	spin_unlock_irqrestore(&ide_lock, flags);
	121	}
	122
c413b9b9 BZ	123	static const struct ide_port_info umc8672_port_info __initdata = {
	124	.chipset = ide_umc8672,
	125	.host_flags = IDE_HFLAG_NO_DMA \| IDE_HFLAG_NO_AUTOTUNE,
	126	.pio_mask = ATA_PIO4,
	127	};
	128
1da177e4 LT	129	static int __init umc8672_probe(void)
1da177e4 LT	130	{
e277f91f	131	ide_hwif_t hwif, mate;
8447d9d5	132	unsigned long flags;
e277f91f	133	static u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
dfd87842	134	hw_regs_t hw[2];
1da177e4 LT	135
	136	if (!request_region(0x108, 2, "umc8672")) {
	137	printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
	138	return 1;
	139	}
	140	local_irq_save(flags);
0905bc94	141	outb_p(0x5A, 0x108); /* enable umc */
1da177e4 LT	142	if (in_umc (0xd5) != 0xa0) {
	143	local_irq_restore(flags);
	144	printk(KERN_ERR "umc8672: not found\n");
	145	release_region(0x108, 2);
0905bc94	146	return 1;
1da177e4	147	}
0905bc94	148	outb_p(0xa5, 0x108); /* disable umc */
1da177e4	149
0905bc94	150	umc_set_speeds(current_speeds);
1da177e4 LT	151	local_irq_restore(flags);
1da177e4 LT	152
dfd87842 BZ	153	memset(&hw, 0, sizeof(hw));
	154
	155	ide_std_init_ports(&hw[0], 0x1f0, 0x3f6);
	156	hw[0].irq = 14;
	157
	158	ide_std_init_ports(&hw[1], 0x170, 0x376);
	159	hw[1].irq = 15;
	160
e277f91f BZ	161	hwif = ide_find_port();
	162	if (hwif) {
	163	ide_init_port_hw(hwif, &hw[0]);
	164	hwif->set_pio_mode = umc_set_pio_mode;
	165	idx[0] = hwif->index;
	166	}
dfd87842	167
e277f91f BZ	168	mate = ide_find_port();
	169	if (mate) {
	170	ide_init_port_hw(mate, &hw[1]);
	171	mate->set_pio_mode = umc_set_pio_mode;
	172	idx[1] = mate->index;
	173	}
1da177e4	174
c413b9b9	175	ide_device_add(idx, &umc8672_port_info);
1da177e4 LT	176
	177	return 0;
	178	}
	179
0905bc94	180	int probe_umc8672;
84913882 BZ	181
	182	module_param_named(probe, probe_umc8672, bool, 0);
	183	MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
	184
ade2daf9	185	static int __init umc8672_init(void)
1da177e4	186	{
84913882 BZ	187	if (probe_umc8672 == 0)
	188	goto out;
	189
	190	if (umc8672_probe() == 0)
	191	return 0;;
	192	out:
	193	return -ENODEV;;
1da177e4 LT	194	}
1da177e4 LT	195
1da177e4	196	module_init(umc8672_init);
1da177e4 LT	197
	198	MODULE_AUTHOR("Wolfram Podien");
	199	MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
	200	MODULE_LICENSE("GPL");