path: root/drivers/ata/pata_legacy.c

/*
 *   pata-legacy.c - Legacy port PATA/SATA controller driver.
 *   Copyright 2005/2006 Red Hat <alan@redhat.com>, all rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *   An ATA driver for the legacy ATA ports.
 *
 *   Data Sources:
 *	Opti 82C465/82C611 support: Data sheets at opti-inc.com
 *	HT6560 series:
 *	Promise 20230/20620:
 *		http://www.ryston.cz/petr/vlb/pdc20230b.html
 *		http://www.ryston.cz/petr/vlb/pdc20230c.html
 *		http://www.ryston.cz/petr/vlb/pdc20630.html
 *
 *  Unsupported but docs exist:
 *	Appian/Adaptec AIC25VL01/Cirrus Logic PD7220
 *	Winbond W83759A
 *
 *  This driver handles legacy (that is "ISA/VLB side") IDE ports found
 *  on PC class systems. There are three hybrid devices that are exceptions
 *  The Cyrix 5510/5520 where a pre SFF ATA device is on the bridge and
 *  the MPIIX where the tuning is PCI side but the IDE is "ISA side".
 *
 *  Specific support is included for the ht6560a/ht6560b/opti82c611a/
 *  opti82c465mv/promise 20230c/20630
 *
 *  Use the autospeed and pio_mask options with:
 *	Appian ADI/2 aka CLPD7220 or AIC25VL01.
 *  Use the jumpers, autospeed and set pio_mask to the mode on the jumpers with
 *	Goldstar GM82C711, PIC-1288A-125, UMC 82C871F, Winbond W83759,
 *	Winbond W83759A, Promise PDC20230-B
 *
 *  For now use autospeed and pio_mask as above with the W83759A. This may
 *  change.
 *
 *  TODO
 *	Merge existing pata_qdi driver
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/ata.h>
#include <linux/libata.h>
#include <linux/platform_device.h>

#define DRV_NAME "pata_legacy"
#define DRV_VERSION "0.5.3"

#define NR_HOST 6

static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
static int legacy_irq[NR_HOST] = { 15, 14, 11, 10, 8, 12 };

struct legacy_data {
	unsigned long timing;
	u8 clock[2];
	u8 last;
	int fast;
	struct platform_device *platform_dev;

};

static struct legacy_data legacy_data[NR_HOST];
static struct ata_host *legacy_host[NR_HOST];
static int nr_legacy_host;


static int probe_all;			/* Set to check all ISA port ranges */
static int ht6560a;			/* HT 6560A on primary 1, secondary 2, both 3 */
static int ht6560b;			/* HT 6560A on primary 1, secondary 2, both 3 */
static int opti82c611a;			/* Opti82c611A on primary 1, secondary 2, both 3 */
static int opti82c46x;			/* Opti 82c465MV present (pri/sec autodetect) */
static int autospeed;			/* Chip present which snoops speed changes */
static int pio_mask = 0x1F;		/* PIO range for autospeed devices */
static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */

/**
 *	legacy_set_mode		-	mode setting
 *	@ap: IDE interface
 *	@unused: Device that failed when error is returned
 *
 *	Use a non standard set_mode function. We don't want to be tuned.
 *
 *	The BIOS configured everything. Our job is not to fiddle. Just use
 *	whatever PIO the hardware is using and leave it at that. When we
 *	get some kind of nice user driven API for control then we can
 *	expand on this as per hdparm in the base kernel.
 */

static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
{
	int i;

	for (i = 0; i < ATA_MAX_DEVICES; i++) {
		struct ata_device *dev = &ap->device[i];
		if (ata_dev_enabled(dev)) {
			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
			dev->pio_mode = XFER_PIO_0;
			dev->xfer_mode = XFER_PIO_0;
			dev->xfer_shift = ATA_SHIFT_PIO;
			dev->flags |= ATA_DFLAG_PIO;
		}
	}
	return 0;
}

static struct scsi_host_template legacy_sht = {
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.ioctl			= ata_scsi_ioctl,
	.queuecommand		= ata_scsi_queuecmd,
	.can_queue		= ATA_DEF_QUEUE,
	.this_id		= ATA_SHT_THIS_ID,
	.sg_tablesize		= LIBATA_MAX_PRD,
	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
	.emulated		= ATA_SHT_EMULATED,
	.use_clustering		= ATA_SHT_USE_CLUSTERING,
	.proc_name		= DRV_NAME,
	.dma_boundary		= ATA_DMA_BOUNDARY,
	.slave_configure	= ata_scsi_slave_config,
	.slave_destroy		= ata_scsi_slave_destroy,
	.bios_param		= ata_std_bios_param,
};

/*
 *	These ops are used if the user indicates the hardware
 *	snoops the commands to decide on the mode and handles the
 *	mode selection "magically" itself. Several legacy controllers
 *	do this. The mode range can be set if it is not 0x1F by setting
 *	pio_mask as well.
 */

static struct ata_port_operations simple_port_ops = {
	.port_disable	= ata_port_disable,
	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	= ata_std_dev_select,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= ata_bmdma_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_data_xfer_noirq,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,
	.irq_ack	= ata_irq_ack,

	.port_start	= ata_port_start,
};

static struct ata_port_operations legacy_port_ops = {
	.set_mode	= legacy_set_mode,

	.port_disable	= ata_port_disable,
	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	<