Move libata to drivers/ata.

1 files changed, 844 insertions, 0 deletions

diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
new file mode 100644
index 00000000000..a5b3a7db7a9
--- /dev/null
+++ b/drivers/ata/sata_promise.c
@@ -0,0 +1,844 @@
+/*
+ *  sata_promise.c - Promise SATA
+ *
+ *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
+ *  		    Please ALWAYS copy linux-ide@vger.kernel.org
+ *		    on emails.
+ *
+ *  Copyright 2003-2004 Red Hat, Inc.
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *  libata documentation is available via 'make {ps|pdf}docs',
+ *  as Documentation/DocBook/libata.*
+ *
+ *  Hardware information only available under NDA.
+ *
+ */
+
+#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 <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <linux/libata.h>
+#include <asm/io.h>
+#include "sata_promise.h"
+
+#define DRV_NAME	"sata_promise"
+#define DRV_VERSION	"1.04"
+
+
+enum {
+	PDC_PKT_SUBMIT		= 0x40, /* Command packet pointer addr */
+	PDC_INT_SEQMASK		= 0x40,	/* Mask of asserted SEQ INTs */
+	PDC_TBG_MODE		= 0x41,	/* TBG mode */
+	PDC_FLASH_CTL		= 0x44, /* Flash control register */
+	PDC_PCI_CTL		= 0x48, /* PCI control and status register */
+	PDC_GLOBAL_CTL		= 0x48, /* Global control/status (per port) */
+	PDC_CTLSTAT		= 0x60,	/* IDE control and status (per port) */
+	PDC_SATA_PLUG_CSR	= 0x6C, /* SATA Plug control/status reg */
+	PDC2_SATA_PLUG_CSR	= 0x60, /* SATAII Plug control/status reg */
+	PDC_SLEW_CTL		= 0x470, /* slew rate control reg */
+
+	PDC_ERR_MASK		= (1<<19) | (1<<20) | (1<<21) | (1<<22) |
+				  (1<<8) | (1<<9) | (1<<10),
+
+	board_2037x		= 0,	/* FastTrak S150 TX2plus */
+	board_20319		= 1,	/* FastTrak S150 TX4 */
+	board_20619		= 2,	/* FastTrak TX4000 */
+	board_20771		= 3,	/* FastTrak TX2300 */
+	board_2057x		= 4,	/* SATAII150 Tx2plus */
+	board_40518		= 5,	/* SATAII150 Tx4 */
+
+	PDC_HAS_PATA		= (1 << 1), /* PDC20375/20575 has PATA */
+
+	PDC_RESET		= (1 << 11), /* HDMA reset */
+
+	PDC_COMMON_FLAGS	= ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST |
+				  ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI |
+				  ATA_FLAG_PIO_POLLING,
+};
+
+
+struct pdc_port_priv {
+	u8			*pkt;
+	dma_addr_t		pkt_dma;
+};
+
+struct pdc_host_priv {
+	int			hotplug_offset;
+};
+
+static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
+static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
+static irqreturn_t pdc_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
+static void pdc_eng_timeout(struct ata_port *ap);
+static int pdc_port_start(struct ata_port *ap);
+static void pdc_port_stop(struct ata_port *ap);
+static void pdc_pata_phy_reset(struct ata_port *ap);
+static void pdc_sata_phy_reset(struct ata_port *ap);
+static void pdc_qc_prep(struct ata_queued_cmd *qc);
+static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
+static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
+static void pdc_irq_clear(struct ata_port *ap);
+static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
+static void pdc_host_stop(struct ata_host_set *host_set);
+
+
+static struct scsi_host_template pdc_ata_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,
+	.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,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	.bios_param		= ata_std_bios_param,
+};
+
+static const struct ata_port_operations pdc_sata_ops = {
+	.port_disable		= ata_port_disable,
+	.tf_load		= pdc_tf_load_mmio,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.exec_command		= pdc_exec_command_mmio,
+	.dev_select		= ata_std_dev_select,
+
+	.phy_reset		= pdc_sata_phy_reset,
+
+	.qc_prep		= pdc_qc_prep,
+	.qc_issue		= pdc_qc_issue_prot,
+	.eng_timeout		= pdc_eng_timeout,
+	.data_xfer		= ata_mmio_data_xfer,
+	.irq_handler		= pdc_interrupt,
+	.irq_clear		= pdc_irq_clear,
+
+	.scr_read		= pdc_sata_scr_read,
+	.scr_write		= pdc_sata_scr_write,
+	.port_start		= pdc_port_start,
+	.port_stop		= pdc_port_stop,
+	.host_stop		= pdc_host_stop,
+};
+
+static const struct ata_port_operations pdc_pata_ops = {
+	.port_disable		= ata_port_disable,
+	.tf_load		= pdc_tf_load_mmio,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.exec_command		= pdc_exec_command_mmio,
+	.dev_select		= ata_std_dev_select,
+
+	.phy_reset		= pdc_pata_phy_reset,
+
+	.qc_prep		= pdc_qc_prep,
+	.qc_issue		= pdc_qc_issue_prot,
+	.data_xfer		= ata_mmio_data_xfer,
+	.eng_timeout		= pdc_eng_timeout,
+	.irq_handler		= pdc_interrupt,
+	.irq_clear		= pdc_irq_clear,
+
+	.port_start		= pdc_port_start,
+	.port_stop		= pdc_port_stop,
+	.host_stop		= pdc_host_stop,
+};
+
+static const struct ata_port_info pdc_port_info[] = {
+	/* board_2037x */
+	{
+		.sht		= &pdc_ata_sht,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.port_ops	= &pdc_sata_ops,
+	},
+
+	/* board_20319 */
+	{
+		.sht		= &pdc_ata_sht,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.port_ops	= &pdc_sata_ops,
+	},
+
+	/* board_20619 */
+	{
+		.sht		= &pdc_ata_sht,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.port_ops	= &pdc_pata_ops,
+	},
+
+	/* board_20771 */
+	{
+		.sht		= &pdc_ata_sht,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.port_ops	= &pdc_sata_ops,
+	},
+
+	/* board_2057x */
+	{
+		.sht		= &pdc_ata_sht,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.port_ops	= &pdc_sata_ops,
+	},
+
+	/* board_40518 */
+	{
+		.sht		= &pdc_ata_sht,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
+		.port_ops	= &pdc_sata_ops,
+	},
+};
+
+static const struct pci_device_id pdc_ata_pci_tbl[] = {
+	{ PCI_VENDOR_ID_PROMISE, 0x3371, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3570, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3571, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3373, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3375, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3376, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3574, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2057x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3d75, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2057x },
+	{ PCI_VENDOR_ID_PROMISE, 0x3d73, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_2037x },
+
+	{ PCI_VENDOR_ID_PROMISE, 0x3318, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20319 },
+	{ PCI_VENDOR_ID_PROMISE, 0x3319, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20319 },
+	{ PCI_VENDOR_ID_PROMISE, 0x3515, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20319 },
+	{ PCI_VENDOR_ID_PROMISE, 0x3519, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20319 },
+	{ PCI_VENDOR_ID_PROMISE, 0x3d17, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20319 },
+	{ PCI_VENDOR_ID_PROMISE, 0x3d18, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_40518 },
+
+	{ PCI_VENDOR_ID_PROMISE, 0x6629, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20619 },
+
+/* TODO: remove all associated board_20771 code, as it completely
+ * duplicates board_2037x code, unless reason for separation can be
+ * divined.
+ */
+#if 0
+	{ PCI_VENDOR_ID_PROMISE, 0x3570, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+	  board_20771 },
+#endif
+
+	{ }	/* terminate list */
+};
+
+
+static struct pci_driver pdc_ata_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= pdc_ata_pci_tbl,
+	.probe			= pdc_ata_init_one,
+	.remove			= ata_pci_remove_one,
+};
+
+
+static int pdc_port_start(struct ata_port *ap)
+{
+	struct device *dev = ap->host_set->dev;
+	struct pdc_port_priv *pp;
+	int rc;
+
+	rc = ata_port_start(ap);
+	if (rc)
+		return rc;
+
+	pp = kzalloc(sizeof(*pp), GFP_KERNEL);
+	if (!pp) {
+		rc = -ENOMEM;
+		goto err_out;
+	}
+
+	pp->pkt = dma_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
+	if (!pp->pkt) {
+		rc = -ENOMEM;
+		goto err_out_kfree;
+	}
+
+	ap->private_data = pp;
+
+	return 0;
+
+err_out_kfree:
+	kfree(pp);
+err_out:
+	ata_port_stop(ap);
+	return rc;
+}
+
+
+static void pdc_port_stop(struct ata_port *ap)
+{
+	struct device *dev = ap->host_set->dev;
+	struct pdc_port_priv *pp = ap->private_data;
+
+	ap->private_data = NULL;
+	dma_free_coherent(dev, 128, pp->pkt, pp->pkt_dma);
+	kfree(pp);
+	ata_port_stop(ap);
+}
+
+
+static void pdc_host_stop(struct ata_host_set *host_set)
+{
+	struct pdc_host_priv *hp = host_set->private_data;
+
+	ata_pci_host_stop(host_set);
+
+	kfree(hp);
+}
+
+
+static void pdc_reset_port(struct ata_port *ap)
+{
+	void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_CTLSTAT;
+	unsigned int i;
+	u32 tmp;
+
+	for (i = 11; i > 0; i--) {
+		tmp = readl(mmio);
+		if (tmp & PDC_RESET)
+			break;
+
+		udelay(100);
+
+		tmp |= PDC_RESET;
+		writel(tmp, mmio);
+	}
+
+	tmp &= ~PDC_RESET;
+	writel(tmp, mmio);
+	readl(mmio);	/* flush */
+}
+
+static void pdc_sata_phy_reset(struct ata_port *ap)
+{
+	pdc_reset_port(ap);
+	sata_phy_reset(ap);
+}
+
+static void pdc_pata_cbl_detect(struct ata_port *ap)
+{
+	u8 tmp;
+	void __iomem *mmio = (void *) ap->ioaddr.cmd_addr + PDC_CTLSTAT + 0x03;
+
+	tmp = readb(mmio);
+
+	if (tmp & 0x01) {
+		ap->cbl = ATA_CBL_PATA40;
+		ap->udma_mask &= ATA_UDMA_MASK_40C;
+	} else
+		ap->cbl = ATA_CBL_PATA80;
+}
+
+static void pdc_pata_phy_reset(struct ata_port *ap)
+{
+	pdc_pata_cbl_detect(ap);
+	pdc_reset_port(ap);
+	ata_port_probe(ap);
+	ata_bus_reset(ap);
+}
+
+static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+{
+	if (sc_reg > SCR_CONTROL)
+		return 0xffffffffU;
+	return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
+}
+
+
+static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
+			       u32 val)
+{
+	if (sc_reg > SCR_CONTROL)
+		return;
+	writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
+}
+
+static void pdc_qc_prep(struct ata_queued_cmd *qc)
+{
+	struct pdc_port_priv *pp = qc->ap->private_data;
+	unsigned int i;
+
+	VPRINTK("ENTER\n");
+
+	switch (qc->tf.protocol) {
+	case ATA_PROT_DMA:
+		ata_qc_prep(qc);
+		/* fall through */
+
+	case ATA_PROT_NODATA:
+		i = pdc_pkt_header(&qc->tf, qc->ap->prd_dma,
+				   qc->dev->devno, pp->pkt);
+
+		if (qc->tf.flags & ATA_TFLAG_LBA48)
+			i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
+		else
+			i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
+
+		pdc_pkt_footer(&qc->tf, pp->pkt, i);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void pdc_eng_timeout(struct ata_port *ap)
+{
+	struct ata_host_set *host_set = ap->host_set;
+	u8 drv_stat;
+	struct ata_queued_cmd *qc;
+	unsigned long flags;
+
+	DPRINTK("ENTER\n");
+
+	spin_lock_irqsave(&host_set->lock, flags);
+
+	qc = ata_qc_from_tag(ap, ap->active_tag);
+
+	switch (qc->tf.protocol) {
+	case ATA_PROT_DMA:
+	case ATA_PROT_NODATA:
+		ata_port_printk(ap, KERN_ERR, "command timeout\n");
+		drv_stat = ata_wait_idle(ap);
+		qc->err_mask |= __ac_err_mask(drv_stat);
+		break;
+
+	default:
+		drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
+
+		ata_port_printk(ap, KERN_ERR,
+				"unknown timeout, cmd 0x%x stat 0x%x\n",
+				qc->tf.command, drv_stat);
+
+		qc->err_mask |= ac_err_mask(drv_stat);
+		break;
+	}
+
+	spin_unlock_irqrestore(&host_set->lock, flags);
+	ata_eh_qc_complete(qc);
+	DPRINTK("EXIT\n");
+}
+
+static inline unsigned int pdc_host_intr( struct ata_port *ap,
+                                          struct ata_queued_cmd *qc)
+{
+	unsigned int handled = 0;
+	u32 tmp;
+	void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_GLOBAL_CTL;
+
+	tmp = readl(mmio);
+	if (tmp & PDC_ERR_MASK) {
+		qc->err_mask |= AC_ERR_DEV;
+		pdc_reset_port(ap);
+	}
+
+	switch (qc->tf.protocol) {
+	case ATA_PROT_DMA:
+	case ATA_PROT_NODATA:
+		qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
+		ata_qc_complete(qc);
+		handled = 1;
+		break;
+
+        default:
+		ap->stats.idle_irq++;
+		break;
+        }
+
+	return handled;
+}
+
+static void pdc_irq_clear(struct ata_port *ap)
+{
+	struct ata_host_set *host_set = ap->host_set;
+	void __iomem *mmio = host_set->mmio_base;
+
+	readl(mmio + PDC_INT_SEQMASK);
+}
+
+static irqreturn_t pdc_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct ata_host_set *host_set = dev_instance;
+	struct ata_port *ap;
+	u32 mask = 0;
+	unsigned int i, tmp;
+	unsigned int handled = 0;
+	void __iomem *mmio_base;
+
+	VPRINTK("ENTER\n");
+
+	if (!host_set || !host_set->mmio_base) {
+		VPRINTK("QUICK EXIT\n");
+		return IRQ_NONE;
+	}
+
+	mmio_base = host_set->mmio_base;
+
+	/* reading should also clear interrupts */
+	mask = readl(mmio_base + PDC_INT_SEQMASK);
+
+	if (mask == 0xffffffff) {
+		VPRINTK("QUICK EXIT 2\n");
+		return IRQ_NONE;
+	}
+
+	spin_lock(&host_set->lock);
+
+	mask &= 0xffff;		/* only 16 tags possible */
+	if (!mask) {
+		VPRINTK("QUICK EXIT 3\n");
+		goto done_irq;
+	}
+
+	writel(mask, mmio_base + PDC_INT_SEQMASK);
+
+	for (i = 0; i < host_set->n_ports; i++) {
+		VPRINTK("port %u\n", i);
+		ap = host_set->ports[i];
+		tmp = mask & (1 << (i + 1));
+		if (tmp && ap &&
+		    !(ap->flags & ATA_FLAG_DISABLED)) {
+			struct ata_queued_cmd *qc;
+
+			qc = ata_qc_from_tag(ap, ap->active_tag);
+			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
+				handled += pdc_host_intr(ap, qc);
+		}
+	}
+
+	VPRINTK("EXIT\n");
+
+done_irq:
+	spin_unlock(&host_set->lock);
+	return IRQ_RETVAL(handled);
+}
+
+static inline void pdc_packet_start(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct pdc_port_priv *pp = ap->private_data;
+	unsigned int port_no = ap->port_no;
+	u8 seq = (u8) (port_no + 1);
+
+	VPRINTK("ENTER, ap %p\n", ap);
+
+	writel(0x00000001, ap->host_set->mmio_base + (seq * 4));
+	readl(ap->host_set->mmio_base + (seq * 4));	/* flush */
+
+	pp->pkt[2] = seq;
+	wmb();			/* flush PRD, pkt writes */
+	writel(pp->pkt_dma, (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
+	readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */
+}
+
+static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+	switch (qc->tf.protocol) {
+	case ATA_PROT_DMA:
+	case ATA_PROT_NODATA:
+		pdc_packet_start(qc);
+		return 0;
+
+	case ATA_PROT_ATAPI_DMA:
+		BUG();
+		break;
+
+	default:
+		break;
+	}
+
+	return ata_qc_issue_prot(qc);
+}
+
+static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+	WARN_ON (tf->protocol == ATA_PROT_DMA ||
+		 tf->protocol == ATA_PROT_NODATA);
+	ata_tf_load(ap, tf);
+}
+
+
+static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+	WARN_ON (tf->protocol == ATA_PROT_DMA ||
+		 tf->protocol == ATA_PROT_NODATA);
+	ata_exec_command(ap, tf);
+}
+
+
+static void pdc_ata_setup_port(struct ata_ioports *port, unsigned long base)
+{
+	port->cmd_addr		= base;
+	port->data_addr		= base;
+	port->feature_addr	=
+	port->error_addr	= base + 0x4;
+	port->nsect_addr	= base + 0x8;
+	port->lbal_addr		= base + 0xc;
+	port->lbam_addr		= base + 0x10;
+	port->lbah_addr		= base + 0x14;
+	port->device_addr	= base + 0x18;
+	port->command_addr	=
+	port->status_addr	= base + 0x1c;
+	port->altstatus_addr	=
+	port->ctl_addr		= base + 0x38;
+}
+
+
+static void pdc_host_init(unsigned int chip_id, struct ata_probe_ent *pe)
+{
+	void __iomem *mmio = pe->mmio_base;
+	struct pdc_host_priv *hp = pe->private_data;
+	int hotplug_offset = hp->hotplug_offset;
+	u32 tmp;
+
+	/*
+	 * Except for the hotplug stuff, this is voodoo from the
+	 * Promise driver.  Label this entire section
+	 * "TODO: figure out why we do this"
+	 */
+
+	/* change FIFO_SHD to 8 dwords, enable BMR_BURST */
+	tmp = readl(mmio + PDC_FLASH_CTL);
+	tmp |= 0x12000;	/* bit 16 (fifo 8 dw) and 13 (bmr burst?) */
+	writel(tmp, mmio + PDC_FLASH_CTL);
+
+	/* clear plug/unplug flags for all ports */
+	tmp = readl(mmio + hotplug_offset);
+	writel(tmp | 0xff, mmio + hotplug_offset);
+
+	/* mask plug/unplug ints */
+	tmp = readl(mmio + hotplug_offset);
+	writel(tmp | 0xff0000, mmio + hotplug_offset);
+
+	/* reduce TBG clock to 133 Mhz. */
+	tmp = readl(mmio + PDC_TBG_MODE);
+	tmp &= ~0x30000; /* clear bit 17, 16*/
+	tmp |= 0x10000;  /* set bit 17:16 = 0:1 */
+	writel(tmp, mmio + PDC_TBG_MODE);
+
+	readl(mmio + PDC_TBG_MODE);	/* flush */
+	msleep(10);
+
+	/* adjust slew rate control register. */
+	tmp = readl(mmio + PDC_SLEW_CTL);
+	tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
+	tmp  |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
+	writel(tmp, mmio + PDC_SLEW_CTL);
+}
+
+static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	static int printed_version;
+	struct ata_probe_ent *probe_ent = NULL;
+	struct pdc_host_priv *hp;
+	unsigned long base;
+	void __iomem *mmio_base;
+	unsigned int board_idx = (unsigned int) ent->driver_data;
+	int pci_dev_busy = 0;
+	int rc;
+
+	if (!printed_version++)
+		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
+
+	rc = pci_enable_device(pdev);
+	if (rc)
+		return rc;
+
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc) {
+		pci_dev_busy = 1;
+		goto err_out;
+	}
+
+	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+
+	probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
+	if (probe_ent == NULL) {
+		rc = -ENOMEM;
+		goto err_out_regions;
+	}
+
+	probe_ent->dev = pci_dev_to_dev(pdev);
+	INIT_LIST_HEAD(&probe_ent->node);
+
+	mmio_base = pci_iomap(pdev, 3, 0);
+	if (mmio_base == NULL) {
+		rc = -ENOMEM;
+		goto err_out_free_ent;
+	}
+	base = (unsigned long) mmio_base;
+
+	hp = kzalloc(sizeof(*hp), GFP_KERNEL);
+	if (hp == NULL) {
+		rc = -ENOMEM;
+		goto err_out_free_ent;
+	}
+
+	/* Set default hotplug offset */
+	hp->hotplug_offset = PDC_SATA_PLUG_CSR;
+	probe_ent->private_data = hp;
+
+	probe_ent->sht		= pdc_port_info[board_idx].sht;
+	probe_ent->host_flags	= pdc_port_info[board_idx].host_flags;
+	probe_ent->pio_mask	= pdc_port_info[board_idx].pio_mask;
+	probe_ent->mwdma_mask	= pdc_port_info[board_idx].mwdma_mask;
+	probe_ent->udma_mask	= pdc_port_info[board_idx].udma_mask;
+	probe_ent->port_ops	= pdc_port_info[board_idx].port_ops;
+
+       	probe_ent->irq = pdev->irq;
+       	probe_ent->irq_flags = IRQF_SHARED;
+	probe_ent->mmio_base = mmio_base;
+
+	pdc_ata_setup_port(&probe_ent->port[0], base + 0x200);
+	pdc_ata_setup_port(&probe_ent->port[1], base + 0x280);
+
+	probe_ent->port[0].scr_addr = base + 0x400;
+	probe_ent->port[1].scr_addr = base + 0x500;
+
+	/* notice 4-port boards */
+	switch (board_idx) {
+	case board_40518:
+		/* Override hotplug offset for SATAII150 */
+		hp->hotplug_offset = PDC2_SATA_PLUG_CSR;
+		/* Fall through */
+	case board_20319:
+       		probe_ent->n_ports = 4;
+
+		pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
+		pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
+
+		probe_ent->port[2].scr_addr = base + 0x600;
+		probe_ent->port[3].scr_addr = base + 0x700;
+		break;
+	case board_2057x:
+		/* Override hotplug offset for SATAII150 */
+		hp->hotplug_offset = PDC2_SATA_PLUG_CSR;
+		/* Fall through */
+	case board_2037x:
+		probe_ent->n_ports = 2;
+		break;
+	case board_20771:
+		probe_ent->n_ports = 2;
+		break;
+	case board_20619:
+		probe_ent->n_ports = 4;
+
+		pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
+		pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
+
+		probe_ent->port[2].scr_addr = base + 0x600;
+		probe_ent->port[3].scr_addr = base + 0x700;
+		break;
+	default:
+		BUG();
+		break;
+	}
+
+	pci_set_master(pdev);
+
+	/* initialize adapter */
+	pdc_host_init(board_idx, probe_ent);
+
+	/* FIXME: Need any other frees than hp? */
+	if (!ata_device_add(probe_ent))
+		kfree(hp);
+
+	kfree(probe_ent);
+
+	return 0;
+
+err_out_free_ent:
+	kfree(probe_ent);
+err_out_regions:
+	pci_release_regions(pdev);
+err_out:
+	if (!pci_dev_busy)
+		pci_disable_device(pdev);
+	return rc;
+}
+
+
+static int __init pdc_ata_init(void)
+{
+	return pci_register_driver(&pdc_ata_pci_driver);
+}
+
+
+static void __exit pdc_ata_exit(void)
+{
+	pci_unregister_driver(&pdc_ata_pci_driver);
+}
+
+
+MODULE_AUTHOR("Jeff Garzik");
+MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(pdc_ata_init);
+module_exit(pdc_ata_exit);