[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, 226 insertions, 0 deletions

diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
new file mode 100644
index 000000000000..c93406ebf6ed
--- /dev/null
+++ b/drivers/ata/pata_hpt3x3.c
@@ -0,0 +1,226 @@
+/*
+ *	pata_hpt3x3		-	HPT3x3 driver
+ *	(c) Copyright 2005-2006 Red Hat
+ *
+ *	Was pata_hpt34x but the naming was confusing as it supported the
+ *	343 and 363 so it has been renamed.
+ *
+ *	Based on:
+ *	linux/drivers/ide/pci/hpt34x.c		Version 0.40	Sept 10, 2002
+ *	Copyright (C) 1998-2000	Andre Hedrick <andre@linux-ide.org>
+ *
+ *	May be copied or modified under the terms of the GNU General Public
+ *	License
+ */
+ 
+#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_hpt3x3"
+#define DRV_VERSION	"0.4.1"
+
+static int hpt3x3_probe_init(struct ata_port *ap)
+{
+	ap->cbl = ATA_CBL_PATA40;
+	return ata_std_prereset(ap);
+}
+
+/**
+ *	hpt3x3_probe_reset	-	reset the hpt3x3 bus
+ *	@ap: ATA port to reset
+ *
+ *	Perform the housekeeping when doing an ATA bus reeset. We just
+ *	need to force the cable type.
+ */
+
+static void hpt3x3_error_handler(struct ata_port *ap)
+{
+	return ata_bmdma_drive_eh(ap, hpt3x3_probe_init, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *	hpt3x3_set_piomode		-	PIO setup
+ *	@ap: ATA interface
+ *	@adev: device on the interface
+ *
+ *	Set our PIO requirements. This is fairly simple on the HPT3x3 as
+ *	all we have to do is clear the MWDMA and UDMA bits then load the
+ *	mode number.
+ */
+
+static void hpt3x3_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 r1, r2;
+	int dn = 2 * ap->port_no + adev->devno;
+
+	pci_read_config_dword(pdev, 0x44, &r1);
+	pci_read_config_dword(pdev, 0x48, &r2);
+	/* Load the PIO timing number */
+	r1 &= ~(7 << (3 * dn));
+	r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
+	r2 &= ~(0x11 << dn);	/* Clear MWDMA and UDMA bits */
+
+	pci_write_config_dword(pdev, 0x44, r1);
+	pci_write_config_dword(pdev, 0x48, r2);
+}
+
+/**
+ *	hpt3x3_set_dmamode		-	DMA timing setup
+ *	@ap: ATA interface
+ *	@adev: Device being configured
+ *
+ *	Set up the channel for MWDMA or UDMA modes. Much the same as with
+ *	PIO, load the mode number and then set MWDMA or UDMA flag.
+ */
+
+static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 r1, r2;
+	int dn = 2 * ap->port_no + adev->devno;
+	int mode_num = adev->dma_mode & 0x0F;
+
+	pci_read_config_dword(pdev, 0x44, &r1);
+	pci_read_config_dword(pdev, 0x48, &r2);
+	/* Load the timing number */
+	r1 &= ~(7 << (3 * dn));
+	r1 |= (mode_num << (3 * dn));
+	r2 &= ~(0x11 << dn);	/* Clear MWDMA and UDMA bits */
+
+	if (adev->dma_mode >= XFER_UDMA_0)
+		r2 |= 0x01 << dn;	/* Ultra mode */
+	else
+		r2 |= 0x10 << dn;	/* MWDMA */
+
+	pci_write_config_dword(pdev, 0x44, r1);
+	pci_write_config_dword(pdev, 0x48, r2);
+}
+
+static struct scsi_host_template hpt3x3_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 hpt3x3_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= hpt3x3_set_piomode,
+	.set_dmamode	= hpt3x3_set_dmamode,
+	.mode_filter	= ata_pci_default_filter,
+
+	.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	= hpt3x3_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+	.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,
+
+	.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
+};
+
+/**
+ *	hpt3x3_init_one		-	Initialise an HPT343/363
+ *	@dev: PCI device
+ *	@id: Entry in match table
+ *
+ *	Perform basic initialisation. The chip has a quirk that it won't
+ *	function unless it is at XX00. The old ATA driver touched this up
+ *	but we leave it for pci quirks to do properly.
+ */
+
+static int hpt3x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	static struct ata_port_info info = {
+		.sht = &hpt3x3_sht,
+		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
+		.pio_mask = 0x1f,
+		.mwdma_mask = 0x07,
+		.udma_mask = 0x07,
+		.port_ops = &hpt3x3_port_ops
+	};
+	static struct ata_port_info *port_info[2] = { &info, &info };
+	u16 cmd;
+
+	/* Initialize the board */
+	pci_write_config_word(dev, 0x80, 0x00);
+	/* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	if (cmd & PCI_COMMAND_MEMORY)
+		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
+	else
+		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
+
+	/* Now kick off ATA set up */
+	return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id hpt3x3[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT343), },
+	{ 0, },
+};
+
+static struct pci_driver hpt3x3_pci_driver = {
+        .name 		= DRV_NAME,
+	.id_table	= hpt3x3,
+	.probe 		= hpt3x3_init_one,
+	.remove		= ata_pci_remove_one
+};
+
+static int __init hpt3x3_init(void)
+{
+	return pci_register_driver(&hpt3x3_pci_driver);
+}
+
+
+static void __exit hpt3x3_exit(void)
+{
+	pci_unregister_driver(&hpt3x3_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, hpt3x3);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(hpt3x3_init);
+module_exit(hpt3x3_exit);