[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, 423 insertions, 0 deletions

diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
new file mode 100644
index 00000000000..6cb52b0e769
--- /dev/null
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -0,0 +1,423 @@
+/*
+ * pata_pdc202xx_old.c 	- Promise PDC202xx PATA for new ATA layer
+ *			  (C) 2005 Red Hat Inc
+ *			  Alan Cox <alan@redhat.com>
+ *
+ * Based in part on linux/drivers/ide/pci/pdc202xx_old.c
+ *
+ * First cut with LBA48/ATAPI
+ *
+ * TODO:
+ *	Channel interlock/reset on both 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_pdc202xx_old"
+#define DRV_VERSION "0.2.1"
+
+/**
+ *	pdc2024x_pre_reset		-	probe begin
+ *	@ap: ATA port
+ *
+ *	Set up cable type and use generic probe init
+ */
+ 
+static int pdc2024x_pre_reset(struct ata_port *ap)
+{
+	ap->cbl = ATA_CBL_PATA40;
+	return ata_std_prereset(ap);
+}
+
+
+static void pdc2024x_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, pdc2024x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+
+static int pdc2026x_pre_reset(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u16 cis;
+	
+	pci_read_config_word(pdev, 0x50, &cis);
+	if (cis & (1 << (10 + ap->port_no)))
+		ap->cbl = ATA_CBL_PATA80;
+	else
+		ap->cbl = ATA_CBL_PATA40;
+
+	return ata_std_prereset(ap);
+}
+
+static void pdc2026x_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, pdc2026x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *	pdc_configure_piomode	-	set chip PIO timing
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *	@pio: PIO mode
+ *
+ *	Called to do the PIO mode setup. Our timing registers are shared
+ *	so a configure_dmamode call will undo any work we do here and vice
+ *	versa
+ */
+ 
+static void pdc_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
+	static u16 pio_timing[5] = {
+		0x0913, 0x050C , 0x0308, 0x0206, 0x0104
+	};
+	u8 r_ap, r_bp;
+
+	pci_read_config_byte(pdev, port, &r_ap);
+	pci_read_config_byte(pdev, port + 1, &r_bp);
+	r_ap &= ~0x3F;	/* Preserve ERRDY_EN, SYNC_IN */
+	r_bp &= ~0x07;
+	r_ap |= (pio_timing[pio] >> 8);
+	r_bp |= (pio_timing[pio] & 0xFF);
+	
+	if (ata_pio_need_iordy(adev))
+		r_ap |= 0x20;	/* IORDY enable */
+	if (adev->class == ATA_DEV_ATA)
+		r_ap |= 0x10;	/* FIFO enable */
+	pci_write_config_byte(pdev, port, r_ap);
+	pci_write_config_byte(pdev, port + 1, r_bp);
+}
+
+/**
+ *	pdc_set_piomode	-	set initial PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Called to do the PIO mode setup. Our timing registers are shared
+ *	but we want to set the PIO timing by default.
+ */
+ 
+static void pdc_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	pdc_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
+}
+
+/**
+ *	pdc_configure_dmamode	-	set DMA mode in chip
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Load DMA cycle times into the chip ready for a DMA transfer
+ *	to occur.
+ */
+ 
+static void pdc_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
+	static u8 udma_timing[6][2] = {
+		{ 0x60, 0x03 },	/* 33 Mhz Clock */
+		{ 0x40, 0x02 },
+		{ 0x20, 0x01 },
+		{ 0x40, 0x02 },	/* 66 Mhz Clock */
+		{ 0x20, 0x01 },
+		{ 0x20, 0x01 }		
+	};
+	u8 r_bp, r_cp;
+	
+	pci_read_config_byte(pdev, port + 1, &r_bp);
+	pci_read_config_byte(pdev, port + 2, &r_cp);
+	
+	r_bp &= ~0xF0;
+	r_cp &= ~0x0F;
+	
+	if (adev->dma_mode >= XFER_UDMA_0) {
+		int speed = adev->dma_mode - XFER_UDMA_0;
+		r_bp |= udma_timing[speed][0];
+		r_cp |= udma_timing[speed][1];
+		
+	} else {
+		int speed = adev->dma_mode - XFER_MW_DMA_0;
+		r_bp |= 0x60;
+		r_cp |= (5 - speed);
+	}
+	pci_write_config_byte(pdev, port + 1, r_bp);
+	pci_write_config_byte(pdev, port + 2, r_cp);
+	
+}
+
+/**
+ *	pdc2026x_bmdma_start		-	DMA engine begin
+ *	@qc: ATA command
+ *
+ *	In UDMA3 or higher we have to clock switch for the duration of the
+ *	DMA transfer sequence.
+ */
+ 
+static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct ata_taskfile *tf = &qc->tf;
+	int sel66 = ap->port_no ? 0x08: 0x02;
+
+	unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
+	unsigned long clock = master + 0x11;
+	unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
+	
+	u32 len;
+	
+	/* Check we keep host level locking here */
+	if (adev->dma_mode >= XFER_UDMA_2)
+		outb(inb(clock) | sel66, clock);
+	else
+		outb(inb(clock) & ~sel66, clock);
+
+	/* The DMA clocks may have been trashed by a reset. FIXME: make conditional 
+	   and move to qc_issue ? */
+	pdc_set_dmamode(ap, qc->dev);
+
+	/* Cases the state machine will not complete correctly without help */
+	if ((tf->flags & ATA_TFLAG_LBA48) ||  tf->protocol == ATA_PROT_ATAPI_DMA)
+	{
+		if (tf->flags & ATA_TFLAG_LBA48)
+			len = qc->nsect * 512;
+		else
+			len = qc->nbytes;
+		
+		if (tf->flags & ATA_TFLAG_WRITE)
+			len |= 0x06000000;
+		else
+			len |= 0x05000000;
+			
+		outl(len, atapi_reg);
+	}
+	
+	/* Activate DMA */	
+	ata_bmdma_start(qc);
+}
+
+/**
+ *	pdc2026x_bmdma_end		-	DMA engine stop
+ *	@qc: ATA command
+ *
+ *	After a DMA completes we need to put the clock back to 33MHz for
+ *	PIO timings.
+ */
+ 
+static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct ata_taskfile *tf = &qc->tf;
+	
+	int sel66 = ap->port_no ? 0x08: 0x02;
+	/* The clock bits are in the same register for both channels */
+	unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
+	unsigned long clock = master + 0x11;
+	unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
+	
+	/* Cases the state machine will not complete correctly */
+	if (tf->protocol == ATA_PROT_ATAPI_DMA || ( tf->flags & ATA_TFLAG_LBA48)) {
+		outl(0, atapi_reg);
+		outb(inb(clock) & ~sel66, clock);
+	}
+	/* Check we keep host level locking here */
+	/* Flip back to 33Mhz for PIO */
+	if (adev->dma_mode >= XFER_UDMA_2)
+		outb(inb(clock) & ~sel66, clock);
+
+	ata_bmdma_stop(qc);
+}
+
+/**
+ *	pdc2026x_dev_config	-	device setup hook
+ *	@ap: ATA port
+ *	@adev: newly found device
+ *
+ *	Perform chip specific early setup. We need to lock the transfer
+ *	sizes to 8bit to avoid making the state engine on the 2026x cards
+ *	barf.
+ */
+ 
+static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
+{
+	adev->max_sectors = 256;
+}
+
+static struct scsi_host_template pdc_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 pdc2024x_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= pdc_set_piomode,
+	.set_dmamode	= pdc_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	= pdc2024x_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,
+	.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
+};	
+
+static struct ata_port_operations pdc2026x_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= pdc_set_piomode,
+	.set_dmamode	= pdc_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,
+	.dev_config	= pdc2026x_dev_config,
+
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
+	.error_handler	= pdc2026x_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+	.bmdma_setup 	= ata_bmdma_setup,
+	.bmdma_start 	= pdc2026x_bmdma_start,
+	.bmdma_stop	= pdc2026x_bmdma_stop,
+	.bmdma_status 	= ata_bmdma_status,
+
+	.qc_prep 	= ata_qc_prep,
+	.qc_issue	= ata_qc_issue_prot,
+	.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
+};	
+
+static int pdc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	static struct ata_port_info info[3] = {
+		{
+			.sht = &pdc_sht,
+			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+			.pio_mask = 0x1f,
+			.mwdma_mask = 0x07,
+			.udma_mask = ATA_UDMA2,
+			.port_ops = &pdc2024x_port_ops
+		}, 
+		{
+			.sht = &pdc_sht,
+			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+			.pio_mask = 0x1f,
+			.mwdma_mask = 0x07,
+			.udma_mask = ATA_UDMA4,
+			.port_ops = &pdc2026x_port_ops
+		},
+		{
+			.sht = &pdc_sht,
+			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+			.pio_mask = 0x1f,
+			.mwdma_mask = 0x07,
+			.udma_mask = ATA_UDMA5,
+			.port_ops = &pdc2026x_port_ops
+		}
+		
+	};
+	static struct ata_port_info *port_info[2];
+
+	port_info[0] = port_info[1] = &info[id->driver_data];
+	
+	if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
+		struct pci_dev *bridge = dev->bus->self;
+		/* Don't grab anything behind a Promise I2O RAID */
+		if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
+			if( bridge->device == PCI_DEVICE_ID_INTEL_I960)
+				return -ENODEV;
+			if( bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
+				return -ENODEV;
+		}
+	}
+	return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id pdc[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0},
+	{ PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1},
+	{ PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1},
+	{ PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2},
+	{ PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2},
+	{ 0, },
+};
+
+static struct pci_driver pdc_pci_driver = {
+        .name 		= DRV_NAME,
+	.id_table	= pdc,
+	.probe 		= pdc_init_one,
+	.remove		= ata_pci_remove_one
+};
+
+static int __init pdc_init(void)
+{
+	return pci_register_driver(&pdc_pci_driver);
+}
+
+
+static void __exit pdc_exit(void)
+{
+	pci_unregister_driver(&pdc_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pdc);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(pdc_init);
+module_exit(pdc_exit);