[linux-block.git] / drivers / ide / qd65xx.c

/*
 *  Copyright (C) 1996-2001  Linus Torvalds & author (see below)
 */

/*
 *  Version 0.03	Cleaned auto-tune, added probe
 *  Version 0.04	Added second channel tuning
 *  Version 0.05	Enhanced tuning ; added qd6500 support
 *  Version 0.06	Added dos driver's list
 *  Version 0.07	Second channel bug fix 
 *
 * QDI QD6500/QD6580 EIDE controller fast support
 *
 * To activate controller support, use "ide0=qd65xx"
 */

/*
 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
 * Samuel Thibault <samuel.thibault@ens-lyon.org>
 */

#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/ide.h>
#include <linux/init.h>
#include <asm/system.h>
#include <asm/io.h>

#define DRV_NAME "qd65xx"

#include "qd65xx.h"

/*
 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
 *            or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
 *	-- qd6500 is a single IDE interface
 *	-- qd6580 is a dual IDE interface
 *
 * More research on qd6580 being done by willmore@cig.mot.com (David)
 * More Information given by Petr Soucek (petr@ryston.cz)
 * http://www.ryston.cz/petr/vlb
 */

/*
 * base: Timer1
 *
 *
 * base+0x01: Config (R/O)
 *
 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
 * bit 3: qd6500: 1 = disabled, 0 = enabled
 *        qd6580: 1
 * upper nibble:
 *        qd6500: 1100
 *        qd6580: either 1010 or 0101
 *
 *
 * base+0x02: Timer2 (qd6580 only)
 *
 *
 * base+0x03: Control (qd6580 only)
 *
 * bits 0-3 must always be set 1
 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
 *         0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
 *                                                   channel 1 for hdc & hdd
 * bit 1 : 1 = only disks on primary port
 *         0 = disks & ATAPI devices on primary port
 * bit 2-4 : always 0
 * bit 5 : status, but of what ?
 * bit 6 : always set 1 by dos driver
 * bit 7 : set 1 for non-ATAPI devices on primary port
 *	(maybe read-ahead and post-write buffer ?)
 */

static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */

/*
 * qd65xx_select:
 *
 * This routine is invoked to prepare for access to a given drive.
 */

static void qd65xx_dev_select(ide_drive_t *drive)
{
	u8 index = ((	(QD_TIMREG(drive)) & 0x80 ) >> 7) |
			(QD_TIMREG(drive) & 0x02);

	if (timings[index] != QD_TIMING(drive))
		outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));

	outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
}

/*
 * qd6500_compute_timing
 *
 * computes the timing value where
 *	lower nibble represents active time,   in count of VLB clocks
 *	upper nibble represents recovery time, in count of VLB clocks
 */

static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
{
	int clk = ide_vlb_clk ? ide_vlb_clk : 50;
	u8 act_cyc, rec_cyc;

	if (clk <= 33) {
		act_cyc =  9 - IDE_IN(active_time   * clk / 1000 + 1, 2,  9);
		rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
	} else {
		act_cyc =  8 - IDE_IN(active_time   * clk / 1000 + 1, 1,  8);
		rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
	}

	return (rec_cyc << 4) | 0x08 | act_cyc;
}

/*
 * qd6580_compute_timing
 *
 * idem for qd6580
 */

static u8 qd6580_compute_timing (int active_time, int recovery_time)
{
	int clk = ide_vlb_clk ? ide_vlb_clk : 50;
	u8 act_cyc, rec_cyc;

	act_cyc = 17 - IDE_IN(active_time   * clk / 1000 + 1, 2, 17);
	rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);

	return (rec_cyc << 4) | act_cyc;
}

/*
 * qd_find_disk_type
 *
 * tries to find timing from dos driver's table
 */

static int qd_find_disk_type (ide_drive_t *drive,
		int *active_time, int *recovery_time)
{
	struct qd65xx_timing_s *p;
	char *m = (char *)&drive->id[ATA_ID_PROD];
	char model[ATA_ID_PROD_LEN];

	if (*m == 0)
		return 0;

	strncpy(model, m, ATA_ID_PROD_LEN);
	ide_fixstring(model, ATA_ID_PROD_LEN, 1); /* byte-swap */

	for (p = qd65xx_timing ; p->offset != -1 ; p++) {
		if (!strncmp(p->model, model+p->offset, 4)) {
			printk(KERN_DEBUG "%s: listed !\n", drive->name);
			*active_time = p->active;
			*recovery_time = p->recovery;
			return 1;
		}
	}
	return 0;
}

/*
 * qd_set_timing:
 *
 * records the timing
 */

static void qd_set_timing (ide_drive_t *drive, u8 timing)
{
	unsigned long data = (unsigned long)ide_get_drivedata(drive);

	data &= 0xff00;
	data |= timing;
	ide_set_drivedata(drive, (void *)data);

	printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
}

static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	u16 *id = drive->id;
	int active_time   = 175;
	int recovery_time = 415; /* worst case values from the dos driver */

	/*
	 * FIXME: use "pio" value
	 */
	if (!qd_find_disk_type(drive, &active_time, &recovery_time) &&
	    (id[ATA_ID_OLD_PIO_MODES] & 0xff) && (id[ATA_ID_FIELD_VALID] & 2) &&
	    id[ATA_ID_EIDE_PIO] >= 240) {
		printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
			id[ATA_ID_OLD_PIO_MODES] & 0xff);
		active_time = 110;
		recovery_time = drive->id[ATA_ID_EIDE_PIO] - 120;
	}

	qd_set_timing(drive, qd6500_compute_timing(drive->hwif,
				active_time, recovery_time));
}

static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
	unsigned int cycle_time;
	int active_time   = 175;
	int recovery_time = 415; /* worst case values from the dos driver */
	u8 base = (hwif->config_data & 0xff00) >> 8;

	if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
		cycle_time = ide_pio_cycle_time(drive, pio);

		switch (pio) {
			case 0: break;
			case 3:
				if (cycle_time >= 110) {
					active_time = 86;
					recovery_time = cycle_time - 102;
				} else
					printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
				break;
			case 4:
				if (cycle_time >= 69) {
					active_time = 70;
					recovery_time = cycle_time - 61;
				} else
					printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
				break;
			default:
				if (cycle_time >= 180) {
					active_time = 110;
					recovery_time = cycle_time - 120;
				} else {
					active_time = t->active;
					recovery_time = cycle_time - active_time;
				}
		}
		printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
	}

	if (!hwif->channel && drive->media != ide_disk) {
		outb(0x5f, QD_CONTROL_PORT);
		printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
			"and post-write buffer on %s.\n",
			drive->name, hwif->name);
	}

	qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
}

/*
 * qd_testreg
 *
 * tests if the given port is a register
 */

static int __init qd_testreg(int port)
{
	unsigned long flags;
	u8 savereg, readreg;

	local_irq_save(flags);
	savereg = inb_p(port);
	outb_p(QD_TESTVAL, port);	/* safe value */
	readreg = inb_p(port);
	outb(savereg, port);
	local_irq_restore(flags);

	if (savereg == QD_TESTVAL) {
		printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
		printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
		printk(KERN_ERR "Assuming qd65xx is not present.\n");
		return 1;
	}

	return (readreg != QD_TESTVAL);
}

static void __init qd6500_init_dev(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	u8 base = (hwif->config_data & 0xff00) >> 8;
	u8 config = QD_CONFIG(hwif);

	ide_set_drivedata(drive, (void *)QD6500_DEF_DATA);
}

static void __init qd6580_init_dev(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	u16 t1, t2;
	u8 base = (hwif->config_data & 0xff00) >> 8;
	u8 config = QD_CONFIG(hwif);

	if (hwif->host_flags & IDE_HFLAG_SINGLE) {
		t1 = QD6580_DEF_DATA;
		t2 = QD6580_DEF_DATA2;
	} else
		t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;

	ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1));
}

static const struct ide_tp_ops qd65xx_tp_ops = {
	.exec_command		= ide_exec_command,
	.read_status		= ide_read_status,
	.read_altstatus		= ide_read_altstatus,
	.write_devctl		= ide_write_devctl,

	.dev_select		= qd65xx_dev_select,
	.tf_load		= ide_tf_load,
	.tf_read		= ide_tf_read,

	.input_data		= ide_input_data,
	.output_data		= ide_output_data,
};

static const struct ide_port_ops qd6500_port_ops = {
	.init_dev		= qd6500_init_dev,
	.set_pio_mode		= qd6500_set_pio_mode,
};

static const struct ide_port_ops qd6580_port_ops = {
	.init_dev		= qd6580_init_dev,
	.set_pio_mode		= qd6580_set_pio_mode,
};

static const struct ide_port_info qd65xx_port_info __initdata = {
	.name			= DRV_NAME,
	.tp_ops 		= &qd65xx_tp_ops,
	.chipset		= ide_qd65xx,
	.host_flags		= IDE_HFLAG_IO_32BIT |
				  IDE_HFLAG_NO_DMA,
	.pio_mask		= ATA_PIO4,
};

/*
 * qd_probe:
 *
 * looks at the specified baseport, and if qd found, registers & initialises it
 * return 1 if another qd may be probed
 */

static int __init qd_probe(int base)
{
	int rc;
	u8 config, unit, control;
	struct ide_port_info d = qd65xx_port_info;

	config = inb(QD_CONFIG_PORT);

	if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
		return -ENODEV;

	unit = ! (config & QD_CONFIG_IDE_BASEPORT);

	if (unit)
		d.host_flags |= IDE_HFLAG_QD_2ND_PORT;

	switch (config & 0xf0) {
	case QD_CONFIG_QD6500:
		if (qd_testreg(base))
			 return -ENODEV;	/* bad register */

		if (config & QD_CONFIG_DISABLED) {
			printk(KERN_WARNING "qd6500 is disabled !\n");
			return -ENODEV;
		}

		printk(KERN_NOTICE "qd6500 at %#x\n", base);
		printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
			config, QD_ID3);

		d.port_ops = &qd6500_port_ops;
		d.host_flags |= IDE_HFLAG_SINGLE;
		break;
	case QD_CONFIG_QD6580_A:
	case QD_CONFIG_QD6580_B:
		if (qd_testreg(base) || qd_testreg(base + 0x02))
			return -ENODEV;	/* bad registers */

		control = inb(QD_CONTROL_PORT);

		printk(KERN_NOTICE "qd6580 at %#x\n", base);
		printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
			config, control, QD_ID3);

		outb(QD_DEF_CONTR, QD_CONTROL_PORT);

		d.port_ops = &qd6580_port_ops;
		if (control & QD_CONTR_SEC_DISABLED)
			d.host_flags |= IDE_HFLAG_SINGLE;

		printk(KERN_INFO "qd6580: %s IDE board\n",
			(control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
		break;
	default:
		return -ENODEV;
	}

	rc = ide_legacy_device_add(&d, (base << 8) | config);

	if (d.host_flags & IDE_HFLAG_SINGLE)
		return (rc == 0) ? 1 : rc;

	return rc;
}

static int probe_qd65xx;

module_param_named(probe, probe_qd65xx, bool, 0);
MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");

static int __init qd65xx_init(void)
{
	int rc1, rc2 = -ENODEV;

	if (probe_qd65xx == 0)
		return -ENODEV;

	rc1 = qd_probe(0x30);
	if (rc1)
		rc2 = qd_probe(0xb0);

	if (rc1 < 0 && rc2 < 0)
		return -ENODEV;

	return 0;
}

module_init(qd65xx_init);

MODULE_AUTHOR("Samuel Thibault");
MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (C) 1996-2001 Linus Torvalds & author (see below)
	3	*/
	4
	5	/*
	6	* Version 0.03 Cleaned auto-tune, added probe
	7	* Version 0.04 Added second channel tuning
	8	* Version 0.05 Enhanced tuning ; added qd6500 support
	9	* Version 0.06 Added dos driver's list
	10	* Version 0.07 Second channel bug fix
	11	*
	12	* QDI QD6500/QD6580 EIDE controller fast support
	13	*
1da177e4	14	* To activate controller support, use "ide0=qd65xx"
1da177e4 LT	15	*/
	16
	17	/*
	18	* Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
51935355	19	* Samuel Thibault <samuel.thibault@ens-lyon.org>
1da177e4 LT	20	*/
1da177e4 LT	21
1da177e4	22	#include <linux/module.h>
1da177e4 LT	23	#include <linux/types.h>
	24	#include <linux/kernel.h>
	25	#include <linux/delay.h>
	26	#include <linux/timer.h>
	27	#include <linux/mm.h>
	28	#include <linux/ioport.h>
	29	#include <linux/blkdev.h>
1da177e4 LT	30	#include <linux/ide.h>
	31	#include <linux/init.h>
	32	#include <asm/system.h>
	33	#include <asm/io.h>
	34
d92f1a28 BZ	35	#define DRV_NAME "qd65xx"
d92f1a28 BZ	36
1da177e4 LT	37	#include "qd65xx.h"
	38
	39	/*
	40	* I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
	41	* or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
	42	* -- qd6500 is a single IDE interface
	43	* -- qd6580 is a dual IDE interface
	44	*
	45	* More research on qd6580 being done by willmore@cig.mot.com (David)
	46	* More Information given by Petr Soucek (petr@ryston.cz)
	47	* http://www.ryston.cz/petr/vlb
	48	*/
	49
	50	/*
	51	* base: Timer1
	52	*
	53	*
	54	* base+0x01: Config (R/O)
	55	*
	56	* bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
	57	* bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
	58	* bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
	59	* bit 3: qd6500: 1 = disabled, 0 = enabled
	60	* qd6580: 1
	61	* upper nibble:
	62	* qd6500: 1100
	63	* qd6580: either 1010 or 0101
	64	*
	65	*
	66	* base+0x02: Timer2 (qd6580 only)
	67	*
	68	*
	69	* base+0x03: Control (qd6580 only)
	70	*
	71	* bits 0-3 must always be set 1
	72	* bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
	73	* bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
	74	* 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
	75	* channel 1 for hdc & hdd
	76	* bit 1 : 1 = only disks on primary port
	77	* 0 = disks & ATAPI devices on primary port
	78	* bit 2-4 : always 0
	79	* bit 5 : status, but of what ?
	80	* bit 6 : always set 1 by dos driver
	81	* bit 7 : set 1 for non-ATAPI devices on primary port
	82	* (maybe read-ahead and post-write buffer ?)
	83	*/
	84
	85	static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
	86
1da177e4	87	/*
d07616f1	88	* qd65xx_select:
1da177e4	89	*
d07616f1	90	* This routine is invoked to prepare for access to a given drive.
1da177e4 LT	91	*/
1da177e4 LT	92
abb596b2	93	static void qd65xx_dev_select(ide_drive_t *drive)
1da177e4 LT	94	{
	95	u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) \|
	96	(QD_TIMREG(drive) & 0x02);
	97
	98	if (timings[index] != QD_TIMING(drive))
c196567a	99	outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
abb596b2 SS	100
abb596b2 SS	101	outb(drive->select \| ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
1da177e4 LT	102	}
	103
	104	/*
	105	* qd6500_compute_timing
	106	*
	107	* computes the timing value where
	108	* lower nibble represents active time, in count of VLB clocks
	109	* upper nibble represents recovery time, in count of VLB clocks
	110	*/
	111
	112	static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
	113	{
30e5ee4d	114	int clk = ide_vlb_clk ? ide_vlb_clk : 50;
ebae41a5	115	u8 act_cyc, rec_cyc;
1da177e4	116
ebae41a5 BZ	117	if (clk <= 33) {
	118	act_cyc = 9 - IDE_IN(active_time * clk / 1000 + 1, 2, 9);
	119	rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
1da177e4	120	} else {
ebae41a5 BZ	121	act_cyc = 8 - IDE_IN(active_time * clk / 1000 + 1, 1, 8);
ebae41a5 BZ	122	rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
1da177e4 LT	123	}
1da177e4 LT	124
ebae41a5	125	return (rec_cyc << 4) \| 0x08 \| act_cyc;
1da177e4 LT	126	}
	127
	128	/*
	129	* qd6580_compute_timing
	130	*
	131	* idem for qd6580
	132	*/
	133
	134	static u8 qd6580_compute_timing (int active_time, int recovery_time)
	135	{
30e5ee4d	136	int clk = ide_vlb_clk ? ide_vlb_clk : 50;
ebae41a5	137	u8 act_cyc, rec_cyc;
1da177e4	138
ebae41a5 BZ	139	act_cyc = 17 - IDE_IN(active_time * clk / 1000 + 1, 2, 17);
	140	rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
	141
	142	return (rec_cyc << 4) \| act_cyc;
1da177e4 LT	143	}
	144
	145	/*
	146	* qd_find_disk_type
	147	*
	148	* tries to find timing from dos driver's table
	149	*/
	150
	151	static int qd_find_disk_type (ide_drive_t *drive,
	152	int active_time, int recovery_time)
	153	{
	154	struct qd65xx_timing_s *p;
4dde4492 BZ	155	char m = (char )&drive->id[ATA_ID_PROD];
4dde4492 BZ	156	char model[ATA_ID_PROD_LEN];
1da177e4	157
4dde4492 BZ	158	if (*m == 0)
4dde4492 BZ	159	return 0;
1da177e4	160
4dde4492 BZ	161	strncpy(model, m, ATA_ID_PROD_LEN);
4dde4492 BZ	162	ide_fixstring(model, ATA_ID_PROD_LEN, 1); /* byte-swap */
1da177e4 LT	163
	164	for (p = qd65xx_timing ; p->offset != -1 ; p++) {
	165	if (!strncmp(p->model, model+p->offset, 4)) {
	166	printk(KERN_DEBUG "%s: listed !\n", drive->name);
	167	*active_time = p->active;
	168	*recovery_time = p->recovery;
	169	return 1;
	170	}
	171	}
	172	return 0;
	173	}
	174
1da177e4 LT	175	/*
	176	* qd_set_timing:
	177	*
d07616f1	178	* records the timing
1da177e4 LT	179	*/
	180
	181	static void qd_set_timing (ide_drive_t *drive, u8 timing)
	182	{
5bfb151f JR	183	unsigned long data = (unsigned long)ide_get_drivedata(drive);
	184
	185	data &= 0xff00;
	186	data \|= timing;
	187	ide_set_drivedata(drive, (void *)data);
1da177e4 LT	188
	189	printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
	190	}
	191
26bcb879	192	static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4	193	{
4dde4492	194	u16 *id = drive->id;
1da177e4 LT	195	int active_time = 175;
	196	int recovery_time = 415; /* worst case values from the dos driver */
	197
26bcb879 BZ	198	/*
	199	* FIXME: use "pio" value
	200	*/
4dde4492	201	if (!qd_find_disk_type(drive, &active_time, &recovery_time) &&
48fb2688	202	(id[ATA_ID_OLD_PIO_MODES] & 0xff) && (id[ATA_ID_FIELD_VALID] & 2) &&
4dde4492	203	id[ATA_ID_EIDE_PIO] >= 240) {
1da177e4	204	printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
48fb2688	205	id[ATA_ID_OLD_PIO_MODES] & 0xff);
1da177e4	206	active_time = 110;
4dde4492	207	recovery_time = drive->id[ATA_ID_EIDE_PIO] - 120;
1da177e4 LT	208	}
1da177e4 LT	209
898ec223 BZ	210	qd_set_timing(drive, qd6500_compute_timing(drive->hwif,
898ec223 BZ	211	active_time, recovery_time));
1da177e4 LT	212	}
1da177e4 LT	213
26bcb879	214	static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4	215	{
79472b6e	216	ide_hwif_t *hwif = drive->hwif;
2feecfac	217	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
7dd00083	218	unsigned int cycle_time;
1da177e4 LT	219	int active_time = 175;
1da177e4 LT	220	int recovery_time = 415; /* worst case values from the dos driver */
79472b6e	221	u8 base = (hwif->config_data & 0xff00) >> 8;
1da177e4 LT	222
1da177e4 LT	223	if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
7dd00083	224	cycle_time = ide_pio_cycle_time(drive, pio);
1da177e4 LT	225
	226	switch (pio) {
	227	case 0: break;
	228	case 3:
7dd00083	229	if (cycle_time >= 110) {
1da177e4	230	active_time = 86;
7dd00083	231	recovery_time = cycle_time - 102;
1da177e4 LT	232	} else
	233	printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
	234	break;
	235	case 4:
7dd00083	236	if (cycle_time >= 69) {
1da177e4	237	active_time = 70;
7dd00083	238	recovery_time = cycle_time - 61;
1da177e4 LT	239	} else
	240	printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
	241	break;
	242	default:
7dd00083	243	if (cycle_time >= 180) {
1da177e4	244	active_time = 110;
7dd00083	245	recovery_time = cycle_time - 120;
1da177e4	246	} else {
2feecfac	247	active_time = t->active;
7dd00083	248	recovery_time = cycle_time - active_time;
1da177e4 LT	249	}
	250	}
	251	printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
	252	}
	253
898ec223	254	if (!hwif->channel && drive->media != ide_disk) {
c196567a	255	outb(0x5f, QD_CONTROL_PORT);
1da177e4 LT	256	printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
1da177e4 LT	257	"and post-write buffer on %s.\n",
898ec223	258	drive->name, hwif->name);
1da177e4 LT	259	}
	260
	261	qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
	262	}
	263
	264	/*
	265	* qd_testreg
	266	*
	267	* tests if the given port is a register
	268	*/
	269
	270	static int __init qd_testreg(int port)
	271	{
1da177e4	272	unsigned long flags;
f949820d	273	u8 savereg, readreg;
1da177e4	274
c196567a	275	local_irq_save(flags);
1da177e4 LT	276	savereg = inb_p(port);
	277	outb_p(QD_TESTVAL, port); /* safe value */
	278	readreg = inb_p(port);
	279	outb(savereg, port);
c196567a	280	local_irq_restore(flags);
1da177e4 LT	281
	282	if (savereg == QD_TESTVAL) {
	283	printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
	284	printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
	285	printk(KERN_ERR "Assuming qd65xx is not present.\n");
	286	return 1;
	287	}
	288
	289	return (readreg != QD_TESTVAL);
	290	}
	291
e6d95bd1	292	static void __init qd6500_init_dev(ide_drive_t *drive)
1f2cf8b0	293	{
e6d95bd1	294	ide_hwif_t *hwif = drive->hwif;
79472b6e BZ	295	u8 base = (hwif->config_data & 0xff00) >> 8;
79472b6e BZ	296	u8 config = QD_CONFIG(hwif);
1f2cf8b0	297
5bfb151f	298	ide_set_drivedata(drive, (void *)QD6500_DEF_DATA);
1f2cf8b0 BZ	299	}
1f2cf8b0 BZ	300
e6d95bd1	301	static void __init qd6580_init_dev(ide_drive_t *drive)
1f2cf8b0	302	{
e6d95bd1	303	ide_hwif_t *hwif = drive->hwif;
1f2cf8b0	304	u16 t1, t2;
79472b6e BZ	305	u8 base = (hwif->config_data & 0xff00) >> 8;
79472b6e BZ	306	u8 config = QD_CONFIG(hwif);
1f2cf8b0	307
79472b6e	308	if (hwif->host_flags & IDE_HFLAG_SINGLE) {
1f2cf8b0 BZ	309	t1 = QD6580_DEF_DATA;
	310	t2 = QD6580_DEF_DATA2;
	311	} else
	312	t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
	313
5bfb151f	314	ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1));
1da177e4 LT	315	}
1da177e4 LT	316
abb596b2 SS	317	static const struct ide_tp_ops qd65xx_tp_ops = {
	318	.exec_command = ide_exec_command,
	319	.read_status = ide_read_status,
	320	.read_altstatus = ide_read_altstatus,
	321	.write_devctl = ide_write_devctl,
	322
	323	.dev_select = qd65xx_dev_select,
	324	.tf_load = ide_tf_load,
	325	.tf_read = ide_tf_read,
	326
	327	.input_data = ide_input_data,
	328	.output_data = ide_output_data,
	329	};
	330
ac95beed	331	static const struct ide_port_ops qd6500_port_ops = {
e6d95bd1	332	.init_dev = qd6500_init_dev,
ac95beed	333	.set_pio_mode = qd6500_set_pio_mode,
ac95beed BZ	334	};
	335
	336	static const struct ide_port_ops qd6580_port_ops = {
e6d95bd1	337	.init_dev = qd6580_init_dev,
ac95beed	338	.set_pio_mode = qd6580_set_pio_mode,
ac95beed BZ	339	};
ac95beed BZ	340
c413b9b9	341	static const struct ide_port_info qd65xx_port_info __initdata = {
d92f1a28	342	.name = DRV_NAME,
abb596b2	343	.tp_ops = &qd65xx_tp_ops,
c413b9b9 BZ	344	.chipset = ide_qd65xx,
c413b9b9 BZ	345	.host_flags = IDE_HFLAG_IO_32BIT \|
0d28ec7f	346	IDE_HFLAG_NO_DMA,
c413b9b9 BZ	347	.pio_mask = ATA_PIO4,
	348	};
	349
1da177e4 LT	350	/*
	351	* qd_probe:
	352	*
	353	* looks at the specified baseport, and if qd found, registers & initialises it
	354	* return 1 if another qd may be probed
	355	*/
	356
	357	static int __init qd_probe(int base)
	358	{
0bfeee7d	359	int rc;
7a2199f3	360	u8 config, unit, control;
e277f91f	361	struct ide_port_info d = qd65xx_port_info;
1da177e4	362
c196567a	363	config = inb(QD_CONFIG_PORT);
1da177e4 LT	364
1da177e4 LT	365	if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
7daf66dd	366	return -ENODEV;
1da177e4 LT	367
	368	unit = ! (config & QD_CONFIG_IDE_BASEPORT);
	369
e277f91f BZ	370	if (unit)
	371	d.host_flags \|= IDE_HFLAG_QD_2ND_PORT;
	372
7a2199f3 BZ	373	switch (config & 0xf0) {
7a2199f3 BZ	374	case QD_CONFIG_QD6500:
7daf66dd BZ	375	if (qd_testreg(base))
7daf66dd BZ	376	return -ENODEV; /* bad register */
1da177e4	377
1da177e4 LT	378	if (config & QD_CONFIG_DISABLED) {
1da177e4 LT	379	printk(KERN_WARNING "qd6500 is disabled !\n");
7daf66dd	380	return -ENODEV;
1da177e4 LT	381	}
1da177e4 LT	382
e277f91f BZ	383	printk(KERN_NOTICE "qd6500 at %#x\n", base);
	384	printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
	385	config, QD_ID3);
	386
ac95beed	387	d.port_ops = &qd6500_port_ops;
79472b6e	388	d.host_flags \|= IDE_HFLAG_SINGLE;
7a2199f3 BZ	389	break;
	390	case QD_CONFIG_QD6580_A:
	391	case QD_CONFIG_QD6580_B:
7daf66dd BZ	392	if (qd_testreg(base) \|\| qd_testreg(base + 0x02))
7daf66dd BZ	393	return -ENODEV; /* bad registers */
1da177e4	394
c196567a	395	control = inb(QD_CONTROL_PORT);
1da177e4 LT	396
	397	printk(KERN_NOTICE "qd6580 at %#x\n", base);
	398	printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
	399	config, control, QD_ID3);
	400
788d6697 BZ	401	outb(QD_DEF_CONTR, QD_CONTROL_PORT);
788d6697 BZ	402
ac95beed	403	d.port_ops = &qd6580_port_ops;
7a2199f3	404	if (control & QD_CONTR_SEC_DISABLED)
79472b6e BZ	405	d.host_flags \|= IDE_HFLAG_SINGLE;
79472b6e BZ	406
7a2199f3 BZ	407	printk(KERN_INFO "qd6580: %s IDE board\n",
	408	(control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
	409	break;
	410	default:
	411	return -ENODEV;
	412	}
26bcb879	413
7a2199f3	414	rc = ide_legacy_device_add(&d, (base << 8) \| config);
e277f91f	415
7a2199f3 BZ	416	if (d.host_flags & IDE_HFLAG_SINGLE)
7a2199f3 BZ	417	return (rc == 0) ? 1 : rc;
1da177e4	418
7a2199f3	419	return rc;
1da177e4 LT	420	}
1da177e4 LT	421
ef87f8d0	422	static int probe_qd65xx;
84913882 BZ	423
	424	module_param_named(probe, probe_qd65xx, bool, 0);
	425	MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
	426
ade2daf9	427	static int __init qd65xx_init(void)
1da177e4	428	{
7daf66dd BZ	429	int rc1, rc2 = -ENODEV;
7daf66dd BZ	430
84913882 BZ	431	if (probe_qd65xx == 0)
	432	return -ENODEV;
	433
7daf66dd BZ	434	rc1 = qd_probe(0x30);
	435	if (rc1)
	436	rc2 = qd_probe(0xb0);
	437
	438	if (rc1 < 0 && rc2 < 0)
1da177e4	439	return -ENODEV;
7daf66dd	440
1da177e4 LT	441	return 0;
	442	}
	443
1da177e4	444	module_init(qd65xx_init);
1da177e4 LT	445
	446	MODULE_AUTHOR("Samuel Thibault");
	447	MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
	448	MODULE_LICENSE("GPL");