[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, 478 insertions, 0 deletions

diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
new file mode 100644
index 00000000000..e54a0c51681
--- /dev/null
+++ b/drivers/ata/pata_hpt366.c
@@ -0,0 +1,478 @@
+/*
+ * Libata driver for the highpoint 366 and 368 UDMA66 ATA controllers.
+ *
+ * This driver is heavily based upon:
+ *
+ * linux/drivers/ide/pci/hpt366.c		Version 0.36	April 25, 2003
+ *
+ * Copyright (C) 1999-2003		Andre Hedrick <andre@linux-ide.org>
+ * Portions Copyright (C) 2001	        Sun Microsystems, Inc.
+ * Portions Copyright (C) 2003		Red Hat Inc
+ *
+ *
+ * TODO
+ *	Maybe PLL mode
+ *	Look into engine reset on timeout errors. Should not be
+ *		required.
+ */
+
+
+#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_hpt366"
+#define DRV_VERSION	"0.5"
+
+struct hpt_clock {
+	u8	xfer_speed;
+	u32	timing;
+};
+
+/* key for bus clock timings
+ * bit
+ * 0:3    data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
+ *        DMA. cycles = value + 1
+ * 4:8    data_low_time. active time of DIOW_/DIOR_ for PIO and MW
+ *        DMA. cycles = value + 1
+ * 9:12   cmd_high_time. inactive time of DIOW_/DIOR_ during task file
+ *        register access.
+ * 13:17  cmd_low_time. active time of DIOW_/DIOR_ during task file
+ *        register access.
+ * 18:21  udma_cycle_time. clock freq and clock cycles for UDMA xfer.
+ *        during task file register access.
+ * 22:24  pre_high_time. time to initialize 1st cycle for PIO and MW DMA
+ *        xfer.
+ * 25:27  cmd_pre_high_time. time to initialize 1st PIO cycle for task
+ *        register access.
+ * 28     UDMA enable
+ * 29     DMA enable
+ * 30     PIO_MST enable. if set, the chip is in bus master mode during
+ *        PIO.
+ * 31     FIFO enable.
+ */
+
+static const struct hpt_clock hpt366_40[] = {
+	{	XFER_UDMA_4,	0x900fd943	},
+	{	XFER_UDMA_3,	0x900ad943	},
+	{	XFER_UDMA_2,	0x900bd943	},
+	{	XFER_UDMA_1,	0x9008d943	},
+	{	XFER_UDMA_0,	0x9008d943	},
+
+	{	XFER_MW_DMA_2,	0xa008d943	},
+	{	XFER_MW_DMA_1,	0xa010d955	},
+	{	XFER_MW_DMA_0,	0xa010d9fc	},
+
+	{	XFER_PIO_4,	0xc008d963	},
+	{	XFER_PIO_3,	0xc010d974	},
+	{	XFER_PIO_2,	0xc010d997	},
+	{	XFER_PIO_1,	0xc010d9c7	},
+	{	XFER_PIO_0,	0xc018d9d9	},
+	{	0,		0x0120d9d9	}
+};
+
+static const struct hpt_clock hpt366_33[] = {
+	{	XFER_UDMA_4,	0x90c9a731	},
+	{	XFER_UDMA_3,	0x90cfa731	},
+	{	XFER_UDMA_2,	0x90caa731	},
+	{	XFER_UDMA_1,	0x90cba731	},
+	{	XFER_UDMA_0,	0x90c8a731	},
+
+	{	XFER_MW_DMA_2,	0xa0c8a731	},
+	{	XFER_MW_DMA_1,	0xa0c8a732	},	/* 0xa0c8a733 */
+	{	XFER_MW_DMA_0,	0xa0c8a797	},
+
+	{	XFER_PIO_4,	0xc0c8a731	},
+	{	XFER_PIO_3,	0xc0c8a742	},
+	{	XFER_PIO_2,	0xc0d0a753	},
+	{	XFER_PIO_1,	0xc0d0a7a3	},	/* 0xc0d0a793 */
+	{	XFER_PIO_0,	0xc0d0a7aa	},	/* 0xc0d0a7a7 */
+	{	0,		0x0120a7a7	}
+};
+
+static const struct hpt_clock hpt366_25[] = {
+	{	XFER_UDMA_4,	0x90c98521	},
+	{	XFER_UDMA_3,	0x90cf8521	},
+	{	XFER_UDMA_2,	0x90cf8521	},
+	{	XFER_UDMA_1,	0x90cb8521	},
+	{	XFER_UDMA_0,	0x90cb8521	},
+
+	{	XFER_MW_DMA_2,	0xa0ca8521	},
+	{	XFER_MW_DMA_1,	0xa0ca8532	},
+	{	XFER_MW_DMA_0,	0xa0ca8575	},
+
+	{	XFER_PIO_4,	0xc0ca8521	},
+	{	XFER_PIO_3,	0xc0ca8532	},
+	{	XFER_PIO_2,	0xc0ca8542	},
+	{	XFER_PIO_1,	0xc0d08572	},
+	{	XFER_PIO_0,	0xc0d08585	},
+	{	0,		0x01208585	}
+};
+
+static const char *bad_ata33[] = {
+	"Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
+	"Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
+	"Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
+	"Maxtor 90510D4",
+	"Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
+	"Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
+	"Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
+	NULL
+};
+
+static const char *bad_ata66_4[] = {
+	"IBM-DTLA-307075",
+	"IBM-DTLA-307060",
+	"IBM-DTLA-307045",
+	"IBM-DTLA-307030",
+	"IBM-DTLA-307020",
+	"IBM-DTLA-307015",
+	"IBM-DTLA-305040",
+	"IBM-DTLA-305030",
+	"IBM-DTLA-305020",
+	"IC35L010AVER07-0",
+	"IC35L020AVER07-0",
+	"IC35L030AVER07-0",
+	"IC35L040AVER07-0",
+	"IC35L060AVER07-0",
+	"WDC AC310200R",
+	NULL
+};
+
+static const char *bad_ata66_3[] = {
+	"WDC AC310200R",
+	NULL
+};
+
+static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char *list[])
+{
+	unsigned char model_num[40];
+	char *s;
+	unsigned int len;
+	int i = 0;
+
+	ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
+	s = &model_num[0];
+	len = strnlen(s, sizeof(model_num));
+
+	/* ATAPI specifies that empty space is blank-filled; remove blanks */
+	while ((len > 0) && (s[len - 1] == ' ')) {
+		len--;
+		s[len] = 0;
+	}
+
+	while(list[i] != NULL) {
+		if (!strncmp(list[i], s, len)) {
+			printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n", 
+				modestr, list[i]);
+			return 1;
+		}
+		i++;
+	}
+	return 0;
+}
+
+/**
+ *	hpt366_filter	-	mode selection filter
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Block UDMA on devices that cause trouble with this controller.
+ */
+ 
+static unsigned long hpt366_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long mask)
+{
+	if (adev->class == ATA_DEV_ATA) {
+		if (hpt_dma_blacklisted(adev, "UDMA",  bad_ata33))
+			mask &= ~ATA_MASK_UDMA;
+		if (hpt_dma_blacklisted(adev, "UDMA3", bad_ata66_3))
+			mask &= ~(0x07 << ATA_SHIFT_UDMA);
+		if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
+			mask &= ~(0x0F << ATA_SHIFT_UDMA);
+	}
+	return ata_pci_default_filter(ap, adev, mask);
+}
+
+/**
+ *	hpt36x_find_mode	-	reset the hpt36x bus
+ *	@ap: ATA port
+ *	@speed: transfer mode
+ *
+ *	Return the 32bit register programming information for this channel
+ *	that matches the speed provided.
+ */
+ 
+static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
+{
+	struct hpt_clock *clocks = ap->host->private_data;
+	
+	while(clocks->xfer_speed) {
+		if (clocks->xfer_speed == speed)
+			return clocks->timing;
+		clocks++;
+	}
+	BUG();
+	return 0xffffffffU;	/* silence compiler warning */
+}
+	
+static int hpt36x_pre_reset(struct ata_port *ap)
+{
+	u8 ata66;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	
+	pci_read_config_byte(pdev, 0x5A, &ata66);
+	if (ata66 & (1 << ap->port_no))
+		ap->cbl = ATA_CBL_PATA40;
+	else
+		ap->cbl = ATA_CBL_PATA80;
+	return ata_std_prereset(ap);
+}
+
+/**
+ *	hpt36x_error_handler	-	reset the hpt36x bus
+ *	@ap: ATA port to reset
+ *
+ *	Perform the reset handling for the 366/368
+ */
+ 
+static void hpt36x_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, hpt36x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *	hpt366_set_piomode		-	PIO setup
+ *	@ap: ATA interface
+ *	@adev: device on the interface
+ *
+ *	Perform PIO mode setup. 
+ */
+ 
+static void hpt366_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 addr1, addr2;
+	u32 reg;
+	u32 mode;
+	u8 fast;
+
+	addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
+	addr2 = 0x51 + 4 * ap->port_no;
+	
+	/* Fast interrupt prediction disable, hold off interrupt disable */
+	pci_read_config_byte(pdev, addr2, &fast);
+	if (fast & 0x80) {
+		fast &= ~0x80;
+		pci_write_config_byte(pdev, addr2, fast);
+	}
+	
+	pci_read_config_dword(pdev, addr1, &reg);
+	mode = hpt36x_find_mode(ap, adev->pio_mode);
+	mode &= ~0x8000000;	/* No FIFO in PIO */
+	mode &= ~0x30070000;	/* Leave config bits alone */
+	reg &= 0x30070000;	/* Strip timing bits */
+	pci_write_config_dword(pdev, addr1, reg | mode);
+}
+
+/**
+ *	hpt366_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 hpt366_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 addr1, addr2;
+	u32 reg;
+	u32 mode;
+	u8 fast;
+
+	addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
+	addr2 = 0x51 + 4 * ap->port_no;
+	
+	/* Fast interrupt prediction disable, hold off interrupt disable */
+	pci_read_config_byte(pdev, addr2, &fast);
+	if (fast & 0x80) {
+		fast &= ~0x80;
+		pci_write_config_byte(pdev, addr2, fast);
+	}
+	
+	pci_read_config_dword(pdev, addr1, &reg);
+	mode = hpt36x_find_mode(ap, adev->dma_mode);
+	mode |= 0x8000000;	/* FIFO in MWDMA or UDMA */
+	mode &= ~0xC0000000;	/* Leave config bits alone */
+	reg &= 0xC0000000;	/* Strip timing bits */
+	pci_write_config_dword(pdev, addr1, reg | mode);
+}
+
+static struct scsi_host_template hpt36x_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,
+};
+
+/*
+ *	Configuration for HPT366/68
+ */
+ 
+static struct ata_port_operations hpt366_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= hpt366_set_piomode,
+	.set_dmamode	= hpt366_set_dmamode,
+	.mode_filter	= hpt366_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	= hpt36x_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
+};	
+
+/**
+ *	hpt36x_init_one		-	Initialise an HPT366/368
+ *	@dev: PCI device
+ *	@id: Entry in match table
+ *
+ *	Initialise an HPT36x device. There are some interesting complications
+ *	here. Firstly the chip may report 366 and be one of several variants.
+ *	Secondly all the timings depend on the clock for the chip which we must
+ *	detect and look up
+ *
+ *	This is the known chip mappings. It may be missing a couple of later
+ *	releases.
+ *
+ *	Chip version		PCI		Rev	Notes
+ *	HPT366			4 (HPT366)	0	UDMA66
+ *	HPT366			4 (HPT366)	1	UDMA66
+ *	HPT368			4 (HPT366)	2	UDMA66
+ *	HPT37x/30x		4 (HPT366)	3+	Other driver
+ *
+ */
+ 
+static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	static struct ata_port_info info_hpt366 = {
+		.sht = &hpt36x_sht,
+		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+		.pio_mask = 0x1f,
+		.mwdma_mask = 0x07,
+		.udma_mask = 0x1f,
+		.port_ops = &hpt366_port_ops
+	};
+	struct ata_port_info *port_info[2] = {&info_hpt366, &info_hpt366};
+
+	u32 class_rev;
+	u32 reg1;
+	u8 drive_fast;
+
+	pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
+	class_rev &= 0xFF;
+	
+	/* May be a later chip in disguise. Check */
+	/* Newer chips are not in the HPT36x driver. Ignore them */
+	if (class_rev > 2)
+			return -ENODEV;
+
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
+	pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
+	pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
+
+	pci_read_config_byte(dev, 0x51, &drive_fast);
+	if (drive_fast & 0x80)
+		pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
+
+	pci_read_config_dword(dev, 0x40,  &reg1);
+	
+	/* PCI clocking determines the ATA timing values to use */
+	/* info_hpt366 is safe against re-entry so we can scribble on it */
+	switch(reg1 & 0x700) {
+		case 5:
+			info_hpt366.private_data = &hpt366_40;
+			break;
+		case 9:
+			info_hpt366.private_data = &hpt366_25;
+			break;
+		default:
+			info_hpt366.private_data = &hpt366_33;
+			break;
+	}
+	/* Now kick off ATA set up */
+	return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id hpt36x[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT366), },
+	{ 0, },
+};
+
+static struct pci_driver hpt36x_pci_driver = {
+        .name 		= DRV_NAME,
+	.id_table	= hpt36x,
+	.probe 		= hpt36x_init_one,
+	.remove		= ata_pci_remove_one
+};
+
+static int __init hpt36x_init(void)
+{
+	return pci_register_driver(&hpt36x_pci_driver);
+}
+
+
+static void __exit hpt36x_exit(void)
+{
+	pci_unregister_driver(&hpt36x_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, hpt36x);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(hpt36x_init);
+module_exit(hpt36x_exit);