[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, 306 insertions, 0 deletions

diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
new file mode 100644
index 000000000000..3f78a1e54a75
--- /dev/null
+++ b/drivers/ata/pata_atiixp.c
@@ -0,0 +1,306 @@
+/*
+ * pata_atiixp.c 	- ATI PATA for new ATA layer
+ *			  (C) 2005 Red Hat Inc
+ *			  Alan Cox <alan@redhat.com>
+ *
+ * Based on
+ *
+ *  linux/drivers/ide/pci/atiixp.c	Version 0.01-bart2	Feb. 26, 2004
+ *
+ *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
+ *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
+ *
+ */
+
+#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_atiixp"
+#define DRV_VERSION "0.4.2"
+
+enum {
+	ATIIXP_IDE_PIO_TIMING	= 0x40,
+	ATIIXP_IDE_MWDMA_TIMING	= 0x44,
+	ATIIXP_IDE_PIO_CONTROL	= 0x48,
+	ATIIXP_IDE_PIO_MODE	= 0x4a,
+	ATIIXP_IDE_UDMA_CONTROL	= 0x54,
+	ATIIXP_IDE_UDMA_MODE 	= 0x56
+};
+
+static int atiixp_pre_reset(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	static struct pci_bits atiixp_enable_bits[] = {
+		{ 0x48, 1, 0x01, 0x00 },
+		{ 0x48, 1, 0x08, 0x00 }
+	};
+
+	if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no])) {
+		ata_port_disable(ap);
+		printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id);
+		return 0;
+	}
+	ap->cbl = ATA_CBL_PATA80;
+	return ata_std_prereset(ap);
+}
+
+static void atiixp_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, atiixp_pre_reset, ata_std_softreset, NULL,   ata_std_postreset);
+}
+
+/**
+ *	atiixp_set_pio_timing	-	set initial PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Called by both the pio and dma setup functions to set the controller
+ *	timings for PIO transfers. We must load both the mode number and
+ *	timing values into the controller.
+ */
+
+static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
+{
+	static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
+
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int dn = 2 * ap->port_no + adev->devno;
+
+	/* Check this is correct - the order is odd in both drivers */
+	int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
+	u16 pio_mode_data, pio_timing_data;
+
+	pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
+	pio_mode_data &= ~(0x7 << (4 * dn));
+	pio_mode_data |= pio << (4 * dn);
+	pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
+
+	pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
+	pio_mode_data &= ~(0xFF << timing_shift);
+	pio_mode_data |= (pio_timings[pio] << timing_shift);
+	pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
+}
+
+/**
+ *	atiixp_set_piomode	-	set initial PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Called to do the PIO mode setup. We use a shared helper for this
+ *	as the DMA setup must also adjust the PIO timing information.
+ */
+
+static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
+}
+
+/**
+ *	atiixp_set_dmamode	-	set initial DMA mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Called to do the DMA mode setup. We use timing tables for most
+ *	modes but must tune an appropriate PIO mode to match.
+ */
+
+static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
+
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int dma = adev->dma_mode;
+	int dn = 2 * ap->port_no + adev->devno;
+	int wanted_pio;
+
+	if (adev->dma_mode >= XFER_UDMA_0) {
+		u16 udma_mode_data;
+
+		dma -= XFER_UDMA_0;
+
+		pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
+		udma_mode_data &= ~(0x7 << (4 * dn));
+		udma_mode_data |= dma << (4 * dn);
+		pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
+	} else {
+		u16 mwdma_timing_data;
+		/* Check this is correct - the order is odd in both drivers */
+		int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
+
+		dma -= XFER_MW_DMA_0;
+
+		pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
+		mwdma_timing_data &= ~(0xFF << timing_shift);
+		mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
+		pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
+	}
+	/*
+	 *	We must now look at the PIO mode situation. We may need to
+	 *	adjust the PIO mode to keep the timings acceptable
+	 */
+	 if (adev->dma_mode >= XFER_MW_DMA_2)
+	 	wanted_pio = 4;
+	else if (adev->dma_mode == XFER_MW_DMA_1)
+		wanted_pio = 3;
+	else if (adev->dma_mode == XFER_MW_DMA_0)
+		wanted_pio = 0;
+	else BUG();
+
+	if (adev->pio_mode != wanted_pio)
+		atiixp_set_pio_timing(ap, adev, wanted_pio);
+}
+
+/**
+ *	atiixp_bmdma_start	-	DMA start callback
+ *	@qc: Command in progress
+ *
+ *	When DMA begins we need to ensure that the UDMA control
+ *	register for the channel is correctly set.
+ */
+
+static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int dn = (2 * ap->port_no) + adev->devno;
+	u16 tmp16;
+
+	pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
+	if (adev->dma_mode >= XFER_UDMA_0)
+		tmp16 |= (1 << dn);
+	else
+		tmp16 &= ~(1 << dn);
+	pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
+	ata_bmdma_start(qc);
+}
+
+/**
+ *	atiixp_dma_stop	-	DMA stop callback
+ *	@qc: Command in progress
+ *
+ *	DMA has completed. Clear the UDMA flag as the next operations will
+ *	be PIO ones not UDMA data transfer.
+ */
+
+static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int dn = (2 * ap->port_no) + qc->dev->devno;
+	u16 tmp16;
+
+	pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
+	tmp16 &= ~(1 << dn);
+	pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
+	ata_bmdma_stop(qc);
+}
+
+static struct scsi_host_template atiixp_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 atiixp_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= atiixp_set_piomode,
+	.set_dmamode	= atiixp_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	= atiixp_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+	.bmdma_setup 	= ata_bmdma_setup,
+	.bmdma_start 	= atiixp_bmdma_start,
+	.bmdma_stop	= atiixp_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
+};
+
+static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	static struct ata_port_info info = {
+		.sht = &atiixp_sht,
+		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+		.pio_mask = 0x1f,
+		.mwdma_mask = 0x06,	/* No MWDMA0 support */
+		.udma_mask = 0x3F,
+		.port_ops = &atiixp_port_ops
+	};
+	static struct ata_port_info *port_info[2] = { &info, &info };
+	return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id atiixp[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
+	{ 0, },
+};
+
+static struct pci_driver atiixp_pci_driver = {
+	.name 		= DRV_NAME,
+	.id_table	= atiixp,
+	.probe 		= atiixp_init_one,
+	.remove		= ata_pci_remove_one
+};
+
+static int __init atiixp_init(void)
+{
+	return pci_register_driver(&atiixp_pci_driver);
+}
+
+
+static void __exit atiixp_exit(void)
+{
+	pci_unregister_driver(&atiixp_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, atiixp);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(atiixp_init);
+module_exit(atiixp_exit);