[linux-2.6-block.git] / drivers / ide / legacy / ht6560b.c

/*
 *  linux/drivers/ide/legacy/ht6560b.c		Version 0.07	Feb  1, 2000
 *
 *  Copyright (C) 1995-2000  Linus Torvalds & author (see below)
 */

/*
 *
 *  Version 0.01        Initial version hacked out of ide.c
 *
 *  Version 0.02        Added support for PIO modes, auto-tune
 *
 *  Version 0.03        Some cleanups
 *
 *  Version 0.05        PIO mode cycle timings auto-tune using bus-speed
 *
 *  Version 0.06        Prefetch mode now defaults no OFF. To set
 *                      prefetch mode OFF/ON use "hdparm -p8/-p9".
 *                      Unmask irq is disabled when prefetch mode
 *                      is enabled.
 *
 *  Version 0.07        Trying to fix CD-ROM detection problem.
 *                      "Prefetch" mode bit OFF for ide disks and
 *                      ON for anything else.
 *
 *
 *  HT-6560B EIDE-controller support
 *  To activate controller support use kernel parameter "ide0=ht6560b".
 *  Use hdparm utility to enable PIO mode support.
 *
 *  Author:    Mikko Ala-Fossi            <maf@iki.fi>
 *             Jan Evert van Grootheest   <janevert@iae.nl>
 *
 *  Try:  http://www.maf.iki.fi/~maf/ht6560b/
 */

#define HT6560B_VERSION "v0.07"

#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>

/* #define DEBUG */  /* remove comments for DEBUG messages */

/*
 * The special i/o-port that HT-6560B uses to configuration:
 *    bit0 (0x01): "1" selects secondary interface
 *    bit2 (0x04): "1" enables FIFO function
 *    bit5 (0x20): "1" enables prefetched data read function  (???)
 *
 * The special i/o-port that HT-6560A uses to configuration:
 *    bit0 (0x01): "1" selects secondary interface
 *    bit1 (0x02): "1" enables prefetched data read function
 *    bit2 (0x04): "0" enables multi-master system	      (?)
 *    bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time	      (?)
 */
#define HT_CONFIG_PORT	  0x3e6
#define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8)
/*
 * FIFO + PREFETCH (both a/b-model)
 */
#define HT_CONFIG_DEFAULT 0x1c /* no prefetch */
/* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */
#define HT_SECONDARY_IF	  0x01
#define HT_PREFETCH_MODE  0x20

/*
 * ht6560b Timing values:
 *
 * I reviewed some assembler source listings of htide drivers and found
 * out how they setup those cycle time interfacing values, as they at Holtek
 * call them. IDESETUP.COM that is supplied with the drivers figures out
 * optimal values and fetches those values to drivers. I found out that
 * they use IDE_SELECT_REG to fetch timings to the ide board right after
 * interface switching. After that it was quite easy to add code to
 * ht6560b.c.
 *
 * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine
 * for hda and hdc. But hdb needed higher values to work, so I guess
 * that sometimes it is necessary to give higher value than IDESETUP
 * gives.   [see cmd640.c for an extreme example of this. -ml]
 *
 * Perhaps I should explain something about these timing values:
 * The higher nibble of value is the Recovery Time  (rt) and the lower nibble
 * of the value is the Active Time  (at). Minimum value 2 is the fastest and
 * the maximum value 15 is the slowest. Default values should be 15 for both.
 * So 0x24 means 2 for rt and 4 for at. Each of the drives should have
 * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or
 * similar. If value is too small there will be all sorts of failures.
 *
 * Timing byte consists of
 *	High nibble:  Recovery Cycle Time  (rt)
 *	     The valid values range from 2 to 15. The default is 15.
 *
 *	Low nibble:   Active Cycle Time	   (at)
 *	     The valid values range from 2 to 15. The default is 15.
 *
 * You can obtain optimized timing values by running Holtek IDESETUP.COM
 * for DOS. DOS drivers get their timing values from command line, where
 * the first value is the Recovery Time and the second value is the
 * Active Time for each drive. Smaller value gives higher speed.
 * In case of failures you should probably fall back to a higher value.
 */
#define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff)
#define HT_TIMING_DEFAULT 0xff

/*
 * This routine handles interface switching for the peculiar hardware design
 * on the F.G.I./Holtek HT-6560B VLB IDE interface.
 * The HT-6560B can only enable one IDE port at a time, and requires a
 * silly sequence (below) whenever we switch between primary and secondary.
 */

/*
 * This routine is invoked from ide.c to prepare for access to a given drive.
 */
static void ht6560b_selectproc (ide_drive_t *drive)
{
	unsigned long flags;
	static u8 current_select = 0;
	static u8 current_timing = 0;
	u8 select, timing;
	
	local_irq_save(flags);
	
	select = HT_CONFIG(drive);
	timing = HT_TIMING(drive);
	
	if (select != current_select || timing != current_timing) {
		current_select = select;
		current_timing = timing;
		if (drive->media != ide_disk || !drive->present)
			select |= HT_PREFETCH_MODE;
		(void)inb(HT_CONFIG_PORT);
		(void)inb(HT_CONFIG_PORT);
		(void)inb(HT_CONFIG_PORT);
		(void)inb(HT_CONFIG_PORT);
		outb(select, HT_CONFIG_PORT);
		/*
		 * Set timing for this drive:
		 */
		outb(timing, IDE_SELECT_REG);
		(void)inb(IDE_STATUS_REG);
#ifdef DEBUG
		printk("ht6560b: %s: select=%#x timing=%#x\n",
			drive->name, select, timing);
#endif
	}
	local_irq_restore(flags);
}

/*
 * Autodetection and initialization of ht6560b
 */
static int __init try_to_init_ht6560b(void)
{
	u8 orig_value;
	int i;
	
	/* Autodetect ht6560b */
	if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff)
		return 0;
	
	for (i=3;i>0;i--) {
		outb(0x00, HT_CONFIG_PORT);
		if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) {
			outb(orig_value, HT_CONFIG_PORT);
			return 0;
		}
	}
	outb(0x00, HT_CONFIG_PORT);
	if ((~inb(HT_CONFIG_PORT))& 0x3f) {
		outb(orig_value, HT_CONFIG_PORT);
		return 0;
	}
	/*
	 * Ht6560b autodetected
	 */
	outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT);
	outb(HT_TIMING_DEFAULT, 0x1f6);  /* IDE_SELECT_REG */
	(void) inb(0x1f7);               /* IDE_STATUS_REG */
	
	printk("\nht6560b " HT6560B_VERSION
	       ": chipset detected and initialized"
#ifdef DEBUG
	       " with debug enabled"
#endif
		);
	return 1;
}

static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio)
{
	int active_time, recovery_time;
	int active_cycles, recovery_cycles;
	int bus_speed = system_bus_clock();
	
        if (pio) {
		unsigned int cycle_time;

		cycle_time = ide_pio_cycle_time(drive, pio);

		/*
		 *  Just like opti621.c we try to calculate the
		 *  actual cycle time for recovery and activity
		 *  according system bus speed.
		 */
		active_time = ide_pio_timings[pio].active_time;
		recovery_time = cycle_time
			- active_time
			- ide_pio_timings[pio].setup_time;
		/*
		 *  Cycle times should be Vesa bus cycles
		 */
		active_cycles   = (active_time   * bus_speed + 999) / 1000;
		recovery_cycles = (recovery_time * bus_speed + 999) / 1000;
		/*
		 *  Upper and lower limits
		 */
		if (active_cycles   < 2)  active_cycles   = 2;
		if (recovery_cycles < 2)  recovery_cycles = 2;
		if (active_cycles   > 15) active_cycles   = 15;
		if (recovery_cycles > 15) recovery_cycles = 0;  /* 0==16 */
		
#ifdef DEBUG
		printk("ht6560b: drive %s setting pio=%d recovery=%d (%dns) active=%d (%dns)\n", drive->name, pio, recovery_cycles, recovery_time, active_cycles, active_time);
#endif
		
		return (u8)((recovery_cycles << 4) | active_cycles);
	} else {
		
#ifdef DEBUG
		printk("ht6560b: drive %s setting pio=0\n", drive->name);
#endif
		
		return HT_TIMING_DEFAULT;    /* default setting */
	}
}

/*
 *  Enable/Disable so called prefetch mode
 */
static void ht_set_prefetch(ide_drive_t *drive, u8 state)
{
	unsigned long flags;
	int t = HT_PREFETCH_MODE << 8;
	
	spin_lock_irqsave(&ide_lock, flags);
	
	/*
	 *  Prefetch mode and unmask irq seems to conflict
	 */
	if (state) {
		drive->drive_data |= t;   /* enable prefetch mode */
		drive->no_unmask = 1;
		drive->unmask = 0;
	} else {
		drive->drive_data &= ~t;  /* disable prefetch mode */
		drive->no_unmask = 0;
	}
	
	spin_unlock_irqrestore(&ide_lock, flags);
	
#ifdef DEBUG
	printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));
#endif
}

static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	unsigned long flags;
	u8 timing;
	
	switch (pio) {
	case 8:         /* set prefetch off */
	case 9:         /* set prefetch on */
		ht_set_prefetch(drive, pio & 1);
		return;
	}
	
	timing = ht_pio2timings(drive, pio);
	
	spin_lock_irqsave(&ide_lock, flags);
	
	drive->drive_data &= 0xff00;
	drive->drive_data |= timing;
	
	spin_unlock_irqrestore(&ide_lock, flags);
	
#ifdef DEBUG
	printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);
#endif
}

int probe_ht6560b = 0;

module_param_named(probe, probe_ht6560b, bool, 0);
MODULE_PARM_DESC(probe, "probe for HT6560B chipset");

/* Can be called directly from ide.c. */
int __init ht6560b_init(void)
{
	ide_hwif_t *hwif, *mate;
	static u8 idx[4] = { 0, 1, 0xff, 0xff };
	int t;

	if (probe_ht6560b == 0)
		return -ENODEV;

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

	if (!request_region(HT_CONFIG_PORT, 1, hwif->name)) {
		printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n",
			__FUNCTION__);
		return -ENODEV;
	}

	if (!try_to_init_ht6560b()) {
		printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__);
		goto release_region;
	}

	hwif->chipset = ide_ht6560b;
	hwif->selectproc = &ht6560b_selectproc;
	hwif->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
	hwif->pio_mask = ATA_PIO5;
	hwif->set_pio_mode = &ht6560b_set_pio_mode;
	hwif->serialized = 1;	/* is this needed? */
	hwif->mate = mate;

	mate->chipset = ide_ht6560b;
	mate->selectproc = &ht6560b_selectproc;
	mate->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
	mate->pio_mask = ATA_PIO5;
	mate->set_pio_mode = &ht6560b_set_pio_mode;
	mate->serialized = 1;	/* is this needed? */
	mate->mate = hwif;
	mate->channel = 1;

	/*
	 * Setting default configurations for drives
	 */
	t = (HT_CONFIG_DEFAULT << 8);
	t |= HT_TIMING_DEFAULT;
	hwif->drives[0].drive_data = t;
	hwif->drives[1].drive_data = t;

	t |= (HT_SECONDARY_IF << 8);
	mate->drives[0].drive_data = t;
	mate->drives[1].drive_data = t;

	ide_device_add(idx);

	return 0;

release_region:
	release_region(HT_CONFIG_PORT, 1);
	return -ENODEV;
}

#ifdef MODULE
module_init(ht6560b_init);
#endif

MODULE_AUTHOR("See Local File");
MODULE_DESCRIPTION("HT-6560B EIDE-controller support");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/ide/legacy/ht6560b.c Version 0.07 Feb 1, 2000
	3	*
	4	* Copyright (C) 1995-2000 Linus Torvalds & author (see below)
	5	*/
	6
	7	/*
	8	*
	9	* Version 0.01 Initial version hacked out of ide.c
	10	*
	11	* Version 0.02 Added support for PIO modes, auto-tune
	12	*
	13	* Version 0.03 Some cleanups
	14	*
	15	* Version 0.05 PIO mode cycle timings auto-tune using bus-speed
	16	*
	17	* Version 0.06 Prefetch mode now defaults no OFF. To set
	18	* prefetch mode OFF/ON use "hdparm -p8/-p9".
	19	* Unmask irq is disabled when prefetch mode
	20	* is enabled.
	21	*
	22	* Version 0.07 Trying to fix CD-ROM detection problem.
	23	* "Prefetch" mode bit OFF for ide disks and
	24	* ON for anything else.
	25	*
	26	*
	27	* HT-6560B EIDE-controller support
	28	* To activate controller support use kernel parameter "ide0=ht6560b".
	29	* Use hdparm utility to enable PIO mode support.
	30	*
	31	* Author: Mikko Ala-Fossi <maf@iki.fi>
	32	* Jan Evert van Grootheest <janevert@iae.nl>
	33	*
	34	* Try: http://www.maf.iki.fi/~maf/ht6560b/
	35	*/
	36
	37	#define HT6560B_VERSION "v0.07"
	38
1da177e4	39	#include <linux/module.h>
1da177e4 LT	40	#include <linux/types.h>
	41	#include <linux/kernel.h>
	42	#include <linux/delay.h>
	43	#include <linux/timer.h>
	44	#include <linux/mm.h>
	45	#include <linux/ioport.h>
	46	#include <linux/blkdev.h>
	47	#include <linux/hdreg.h>
	48	#include <linux/ide.h>
	49	#include <linux/init.h>
	50
	51	#include <asm/io.h>
	52
	53	/* #define DEBUG / / remove comments for DEBUG messages */
	54
	55	/*
	56	* The special i/o-port that HT-6560B uses to configuration:
	57	* bit0 (0x01): "1" selects secondary interface
	58	* bit2 (0x04): "1" enables FIFO function
	59	* bit5 (0x20): "1" enables prefetched data read function (???)
	60	*
	61	* The special i/o-port that HT-6560A uses to configuration:
	62	* bit0 (0x01): "1" selects secondary interface
	63	* bit1 (0x02): "1" enables prefetched data read function
	64	* bit2 (0x04): "0" enables multi-master system (?)
	65	* bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time (?)
	66	*/
	67	#define HT_CONFIG_PORT 0x3e6
	68	#define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8)
	69	/*
	70	* FIFO + PREFETCH (both a/b-model)
	71	*/
	72	#define HT_CONFIG_DEFAULT 0x1c /* no prefetch */
	73	/* #define HT_CONFIG_DEFAULT 0x3c / / with prefetch */
	74	#define HT_SECONDARY_IF 0x01
	75	#define HT_PREFETCH_MODE 0x20
	76
	77	/*
	78	* ht6560b Timing values:
	79	*
	80	* I reviewed some assembler source listings of htide drivers and found
	81	* out how they setup those cycle time interfacing values, as they at Holtek
	82	* call them. IDESETUP.COM that is supplied with the drivers figures out
	83	* optimal values and fetches those values to drivers. I found out that
	84	* they use IDE_SELECT_REG to fetch timings to the ide board right after
	85	* interface switching. After that it was quite easy to add code to
	86	* ht6560b.c.
	87	*
	88	* IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine
	89	* for hda and hdc. But hdb needed higher values to work, so I guess
	90	* that sometimes it is necessary to give higher value than IDESETUP
	91	* gives. [see cmd640.c for an extreme example of this. -ml]
	92	*
	93	* Perhaps I should explain something about these timing values:
	94	* The higher nibble of value is the Recovery Time (rt) and the lower nibble
	95	* of the value is the Active Time (at). Minimum value 2 is the fastest and
	96	* the maximum value 15 is the slowest. Default values should be 15 for both.
	97	* So 0x24 means 2 for rt and 4 for at. Each of the drives should have
	98	* both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or
	99	* similar. If value is too small there will be all sorts of failures.
	100	*
	101	* Timing byte consists of
	102	* High nibble: Recovery Cycle Time (rt)
	103	* The valid values range from 2 to 15. The default is 15.
104	*
105	* Low nibble: Active Cycle Time (at)
106	* The valid values range from 2 to 15. The default is 15.
107	*
108	* You can obtain optimized timing values by running Holtek IDESETUP.COM
109	* for DOS. DOS drivers get their timing values from command line, where
110	* the first value is the Recovery Time and the second value is the
111	* Active Time for each drive. Smaller value gives higher speed.
112	* In case of failures you should probably fall back to a higher value.
113	*/
114	#define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff)
115	#define HT_TIMING_DEFAULT 0xff
116
117	/*
118	* This routine handles interface switching for the peculiar hardware design
119	* on the F.G.I./Holtek HT-6560B VLB IDE interface.
120	* The HT-6560B can only enable one IDE port at a time, and requires a
121	* silly sequence (below) whenever we switch between primary and secondary.
122	*/
123
124	/*
125	* This routine is invoked from ide.c to prepare for access to a given drive.
126	*/
127	static void ht6560b_selectproc (ide_drive_t *drive)
128	{
129	unsigned long flags;
130	static u8 current_select = 0;
131	static u8 current_timing = 0;
132	u8 select, timing;
133
134	local_irq_save(flags);
135
136	select = HT_CONFIG(drive);
137	timing = HT_TIMING(drive);
138
139	if (select != current_select \|\| timing != current_timing) {
140	current_select = select;
141	current_timing = timing;
142	if (drive->media != ide_disk \|\| !drive->present)
143	select \|= HT_PREFETCH_MODE;
0ecdca26 BZ	144	(void)inb(HT_CONFIG_PORT);
	145	(void)inb(HT_CONFIG_PORT);
	146	(void)inb(HT_CONFIG_PORT);
	147	(void)inb(HT_CONFIG_PORT);
	148	outb(select, HT_CONFIG_PORT);
1da177e4 LT	149	/*
	150	* Set timing for this drive:
	151	*/
0ecdca26 BZ	152	outb(timing, IDE_SELECT_REG);
0ecdca26 BZ	153	(void)inb(IDE_STATUS_REG);
1da177e4 LT	154	#ifdef DEBUG
	155	printk("ht6560b: %s: select=%#x timing=%#x\n",
	156	drive->name, select, timing);
	157	#endif
	158	}
	159	local_irq_restore(flags);
	160	}
	161
	162	/*
	163	* Autodetection and initialization of ht6560b
	164	*/
	165	static int __init try_to_init_ht6560b(void)
	166	{
	167	u8 orig_value;
	168	int i;
	169
	170	/* Autodetect ht6560b */
	171	if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff)
	172	return 0;
	173
	174	for (i=3;i>0;i--) {
	175	outb(0x00, HT_CONFIG_PORT);
	176	if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) {
	177	outb(orig_value, HT_CONFIG_PORT);
	178	return 0;
	179	}
	180	}
	181	outb(0x00, HT_CONFIG_PORT);
	182	if ((~inb(HT_CONFIG_PORT))& 0x3f) {
	183	outb(orig_value, HT_CONFIG_PORT);
	184	return 0;
	185	}
	186	/*
	187	* Ht6560b autodetected
	188	*/
	189	outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT);
	190	outb(HT_TIMING_DEFAULT, 0x1f6); /* IDE_SELECT_REG */
	191	(void) inb(0x1f7); /* IDE_STATUS_REG */
	192
	193	printk("\nht6560b " HT6560B_VERSION
	194	": chipset detected and initialized"
	195	#ifdef DEBUG
	196	" with debug enabled"
	197	#endif
	198	);
	199	return 1;
	200	}
	201
26bcb879	202	static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio)
1da177e4 LT	203	{
	204	int active_time, recovery_time;
	205	int active_cycles, recovery_cycles;
1da177e4 LT	206	int bus_speed = system_bus_clock();
	207
	208	if (pio) {
7dd00083 BZ	209	unsigned int cycle_time;
7dd00083 BZ	210
7dd00083 BZ	211	cycle_time = ide_pio_cycle_time(drive, pio);
7dd00083 BZ	212
1da177e4 LT	213	/*
	214	* Just like opti621.c we try to calculate the
	215	* actual cycle time for recovery and activity
	216	* according system bus speed.
	217	*/
	218	active_time = ide_pio_timings[pio].active_time;
7dd00083	219	recovery_time = cycle_time
1da177e4 LT	220	- active_time
	221	- ide_pio_timings[pio].setup_time;
	222	/*
	223	* Cycle times should be Vesa bus cycles
	224	*/
	225	active_cycles = (active_time * bus_speed + 999) / 1000;
	226	recovery_cycles = (recovery_time * bus_speed + 999) / 1000;
	227	/*
	228	* Upper and lower limits
	229	*/
	230	if (active_cycles < 2) active_cycles = 2;
	231	if (recovery_cycles < 2) recovery_cycles = 2;
	232	if (active_cycles > 15) active_cycles = 15;
	233	if (recovery_cycles > 15) recovery_cycles = 0; /* 0==16 */
	234
	235	#ifdef DEBUG
	236	printk("ht6560b: drive %s setting pio=%d recovery=%d (%dns) active=%d (%dns)\n", drive->name, pio, recovery_cycles, recovery_time, active_cycles, active_time);
	237	#endif
	238
	239	return (u8)((recovery_cycles << 4) \| active_cycles);
	240	} else {
	241
	242	#ifdef DEBUG
	243	printk("ht6560b: drive %s setting pio=0\n", drive->name);
	244	#endif
	245
	246	return HT_TIMING_DEFAULT; /* default setting */
	247	}
	248	}
	249
	250	/*
	251	* Enable/Disable so called prefetch mode
	252	*/
	253	static void ht_set_prefetch(ide_drive_t *drive, u8 state)
	254	{
	255	unsigned long flags;
	256	int t = HT_PREFETCH_MODE << 8;
	257
	258	spin_lock_irqsave(&ide_lock, flags);
	259
	260	/*
	261	* Prefetch mode and unmask irq seems to conflict
	262	*/
	263	if (state) {
	264	drive->drive_data \|= t; /* enable prefetch mode */
	265	drive->no_unmask = 1;
	266	drive->unmask = 0;
	267	} else {
	268	drive->drive_data &= ~t; /* disable prefetch mode */
	269	drive->no_unmask = 0;
	270	}
	271
	272	spin_unlock_irqrestore(&ide_lock, flags);
	273
	274	#ifdef DEBUG
	275	printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));
	276	#endif
	277	}
	278
26bcb879	279	static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4 LT	280	{
	281	unsigned long flags;
	282	u8 timing;
	283
	284	switch (pio) {
	285	case 8: /* set prefetch off */
	286	case 9: /* set prefetch on */
	287	ht_set_prefetch(drive, pio & 1);
	288	return;
	289	}
	290
	291	timing = ht_pio2timings(drive, pio);
	292
	293	spin_lock_irqsave(&ide_lock, flags);
	294
	295	drive->drive_data &= 0xff00;
	296	drive->drive_data \|= timing;
	297
	298	spin_unlock_irqrestore(&ide_lock, flags);
	299
	300	#ifdef DEBUG
	301	printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);
	302	#endif
	303	}
	304
84913882 BZ	305	int probe_ht6560b = 0;
	306
	307	module_param_named(probe, probe_ht6560b, bool, 0);
	308	MODULE_PARM_DESC(probe, "probe for HT6560B chipset");
	309
1da177e4 LT	310	/* Can be called directly from ide.c. */
	311	int __init ht6560b_init(void)
	312	{
	313	ide_hwif_t hwif, mate;
8447d9d5	314	static u8 idx[4] = { 0, 1, 0xff, 0xff };
1da177e4 LT	315	int t;
1da177e4 LT	316
84913882 BZ	317	if (probe_ht6560b == 0)
	318	return -ENODEV;
	319
1da177e4 LT	320	hwif = &ide_hwifs[0];
	321	mate = &ide_hwifs[1];
	322
	323	if (!request_region(HT_CONFIG_PORT, 1, hwif->name)) {
	324	printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n",
	325	__FUNCTION__);
	326	return -ENODEV;
	327	}
	328
	329	if (!try_to_init_ht6560b()) {
	330	printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__);
	331	goto release_region;
	332	}
	333
	334	hwif->chipset = ide_ht6560b;
	335	hwif->selectproc = &ht6560b_selectproc;
26bcb879	336	hwif->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
4099d143	337	hwif->pio_mask = ATA_PIO5;
26bcb879	338	hwif->set_pio_mode = &ht6560b_set_pio_mode;
1da177e4 LT	339	hwif->serialized = 1; /* is this needed? */
	340	hwif->mate = mate;
	341
	342	mate->chipset = ide_ht6560b;
	343	mate->selectproc = &ht6560b_selectproc;
26bcb879	344	mate->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
4099d143	345	mate->pio_mask = ATA_PIO5;
26bcb879	346	mate->set_pio_mode = &ht6560b_set_pio_mode;
1da177e4 LT	347	mate->serialized = 1; /* is this needed? */
	348	mate->mate = hwif;
	349	mate->channel = 1;
	350
	351	/*
	352	* Setting default configurations for drives
	353	*/
	354	t = (HT_CONFIG_DEFAULT << 8);
	355	t \|= HT_TIMING_DEFAULT;
	356	hwif->drives[0].drive_data = t;
	357	hwif->drives[1].drive_data = t;
	358
	359	t \|= (HT_SECONDARY_IF << 8);
	360	mate->drives[0].drive_data = t;
	361	mate->drives[1].drive_data = t;
	362
8447d9d5	363	ide_device_add(idx);
1da177e4 LT	364
	365	return 0;
	366
	367	release_region:
	368	release_region(HT_CONFIG_PORT, 1);
	369	return -ENODEV;
	370	}
	371
	372	#ifdef MODULE
	373	module_init(ht6560b_init);
	374	#endif
	375
	376	MODULE_AUTHOR("See Local File");
	377	MODULE_DESCRIPTION("HT-6560B EIDE-controller support");
	378	MODULE_LICENSE("GPL");