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 000000000000..a5b3a7db7a9f
--- /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);