[libata] Add a bunch of PATA drivers.

The vast majority of drivers and changes are from Alan Cox.  Albert Lee
contributed and maintains pata_pdc2027x.  Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
new file mode 100644
index 000000000000..3c6d84fd4312
--- /dev/null
+++ b/drivers/ata/pata_rz1000.c
@@ -0,0 +1,205 @@
+/*
+ *  RZ1000/1001 driver based upon
+ *
+ *  linux/drivers/ide/pci/rz1000.c	Version 0.06	January 12, 2003
+ *  Copyright (C) 1995-1998  Linus Torvalds & author (see below)
+ *  Principal Author:  mlord@pobox.com (Mark Lord)
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ *  This file provides support for disabling the buggy read-ahead
+ *  mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
+ */
+
+#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/libata.h>
+
+#define DRV_NAME	"pata_rz1000"
+#define DRV_VERSION	"0.2.2"
+
+
+/**
+ *	rz1000_prereset		-	probe begin
+ *	@ap: ATA port
+ *
+ *	Set up cable type and use generics
+ */
+
+static int rz1000_prereset(struct ata_port *ap)
+{
+	ap->cbl = ATA_CBL_PATA40;
+	return ata_std_prereset(ap);
+}
+
+/**
+ *	rz1000_error_handler		-	probe reset
+ *	@ap: ATA port
+ *
+ *	Perform the ATA standard reset sequence
+ */
+
+static void rz1000_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, rz1000_prereset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *	rz1000_set_mode		-	mode setting function
+ *	@ap: ATA interface
+ *
+ *	Use a non standard set_mode function. We don't want to be tuned. We
+ *	would prefer to be BIOS generic but for the fact our hardware is
+ *	whacked out.
+ */
+
+static void rz1000_set_mode(struct ata_port *ap)
+{
+	int i;
+
+	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+		struct ata_device *dev = &ap->device[i];
+		if (ata_dev_enabled(dev)) {
+			/* We don't really care */
+			dev->pio_mode = XFER_PIO_0;
+			dev->xfer_mode = XFER_PIO_0;
+			dev->xfer_shift = ATA_SHIFT_PIO;
+			dev->flags |= ATA_DFLAG_PIO;
+		}
+	}
+}
+
+
+static struct scsi_host_template rz1000_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,
+	.max_sectors		= ATA_MAX_SECTORS,
+	.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,
+	.bios_param		= ata_std_bios_param,
+};
+
+static struct ata_port_operations rz1000_port_ops = {
+	.set_mode	= rz1000_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 	= ata_std_dev_select,
+
+	.error_handler	= rz1000_error_handler,
+
+	.bmdma_setup 	= ata_bmdma_setup,
+	.bmdma_start 	= ata_bmdma_start,
+	.bmdma_stop	= ata_bmdma_stop,
+	.bmdma_status 	= ata_bmdma_status,
+
+	.qc_prep 	= ata_qc_prep,
+	.qc_issue	= ata_qc_issue_prot,
+	.eng_timeout	= ata_eng_timeout,
+	.data_xfer	= ata_pio_data_xfer,
+
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
+	.error_handler	= rz1000_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+	.irq_handler	= ata_interrupt,
+	.irq_clear	= ata_bmdma_irq_clear,
+
+	.port_start	= ata_port_start,
+	.port_stop	= ata_port_stop,
+	.host_stop	= ata_host_stop
+};
+
+/**
+ *	rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
+ *	@pdev: PCI device to register
+ *	@ent: Entry in rz1000_pci_tbl matching with @pdev
+ *
+ *	Configure an RZ1000 interface. This doesn't require much special
+ *	handling except that we *MUST* kill the chipset readahead or the
+ *	user may experience data corruption.
+ */
+
+static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	static int printed_version;
+	struct ata_port_info *port_info[2];
+	u16 reg;
+	static struct ata_port_info info = {
+		.sht = &rz1000_sht,
+		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+		.pio_mask = 0x1f,
+		.port_ops = &rz1000_port_ops
+	};
+
+	if (!printed_version++)
+		printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
+
+	/* Be exceptionally paranoid as we must be sure to apply the fix */
+	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
+		goto fail;
+	reg &= 0xDFFF;
+	if (pci_write_config_word(pdev, 0x40, reg) != 0)
+		goto fail;
+	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
+
+	port_info[0] = &info;
+	port_info[1] = &info;
+	return ata_pci_init_one(pdev, port_info, 2);
+fail:
+	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
+	/* Not safe to use so skip */
+	return -ENODEV;
+}
+
+static struct pci_device_id pata_rz1000[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
+	{ 0, },
+};
+
+static struct pci_driver rz1000_pci_driver = {
+        .name 		= DRV_NAME,
+	.id_table	= pata_rz1000,
+	.probe 		= rz1000_init_one,
+	.remove		= ata_pci_remove_one
+};
+
+
+static int __init rz1000_init(void)
+{
+	return pci_register_driver(&rz1000_pci_driver);
+}
+
+static void __exit rz1000_exit(void)
+{
+	pci_unregister_driver(&rz1000_pci_driver);
+}
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pata_rz1000);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(rz1000_init);
+module_exit(rz1000_exit);
+