[libata] Move PCI IDE BMDMA-related code to new file libata-bmdma.c.

1 files changed, 703 insertions, 0 deletions

diff --git a/drivers/scsi/libata-bmdma.c b/drivers/scsi/libata-bmdma.c
new file mode 100644
index 000000000000..a93336adcd23
--- /dev/null
+++ b/drivers/scsi/libata-bmdma.c
@@ -0,0 +1,703 @@
+/*
+ *  libata-bmdma.c - helper library for PCI IDE BMDMA
+ *
+ *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
+ *                  Please ALWAYS copy linux-ide@vger.kernel.org
+ *                  on emails.
+ *
+ *  Copyright 2003-2006 Red Hat, Inc.  All rights reserved.
+ *  Copyright 2003-2006 Jeff Garzik
+ *
+ *
+ *  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 documentation available from http://www.t13.org/ and
+ *  http://www.sata-io.org/
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/libata.h>
+
+#include "libata.h"
+
+/**
+ *      ata_tf_load_pio - send taskfile registers to host controller
+ *      @ap: Port to which output is sent
+ *      @tf: ATA taskfile register set
+ *
+ *      Outputs ATA taskfile to standard ATA host controller.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+
+static void ata_tf_load_pio(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+        struct ata_ioports *ioaddr = &ap->ioaddr;
+        unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
+
+        if (tf->ctl != ap->last_ctl) {
+                outb(tf->ctl, ioaddr->ctl_addr);
+                ap->last_ctl = tf->ctl;
+                ata_wait_idle(ap);
+        }
+
+        if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
+                outb(tf->hob_feature, ioaddr->feature_addr);
+                outb(tf->hob_nsect, ioaddr->nsect_addr);
+                outb(tf->hob_lbal, ioaddr->lbal_addr);
+                outb(tf->hob_lbam, ioaddr->lbam_addr);
+                outb(tf->hob_lbah, ioaddr->lbah_addr);
+                VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
+                        tf->hob_feature,
+                        tf->hob_nsect,
+                        tf->hob_lbal,
+                        tf->hob_lbam,
+                        tf->hob_lbah);
+        }
+
+        if (is_addr) {
+                outb(tf->feature, ioaddr->feature_addr);
+                outb(tf->nsect, ioaddr->nsect_addr);
+                outb(tf->lbal, ioaddr->lbal_addr);
+                outb(tf->lbam, ioaddr->lbam_addr);
+                outb(tf->lbah, ioaddr->lbah_addr);
+                VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
+                        tf->feature,
+                        tf->nsect,
+                        tf->lbal,
+                        tf->lbam,
+                        tf->lbah);
+        }
+
+        if (tf->flags & ATA_TFLAG_DEVICE) {
+                outb(tf->device, ioaddr->device_addr);
+                VPRINTK("device 0x%X\n", tf->device);
+        }
+
+        ata_wait_idle(ap);
+}
+
+/**
+ *      ata_tf_load_mmio - send taskfile registers to host controller
+ *      @ap: Port to which output is sent
+ *      @tf: ATA taskfile register set
+ *
+ *      Outputs ATA taskfile to standard ATA host controller using MMIO.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+
+static void ata_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+        struct ata_ioports *ioaddr = &ap->ioaddr;
+        unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
+
+        if (tf->ctl != ap->last_ctl) {
+                writeb(tf->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
+                ap->last_ctl = tf->ctl;
+                ata_wait_idle(ap);
+        }
+
+        if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
+                writeb(tf->hob_feature, (void __iomem *) ioaddr->feature_addr);
+                writeb(tf->hob_nsect, (void __iomem *) ioaddr->nsect_addr);
+                writeb(tf->hob_lbal, (void __iomem *) ioaddr->lbal_addr);
+                writeb(tf->hob_lbam, (void __iomem *) ioaddr->lbam_addr);
+                writeb(tf->hob_lbah, (void __iomem *) ioaddr->lbah_addr);
+                VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
+                        tf->hob_feature,
+                        tf->hob_nsect,
+                        tf->hob_lbal,
+                        tf->hob_lbam,
+                        tf->hob_lbah);
+        }
+
+        if (is_addr) {
+                writeb(tf->feature, (void __iomem *) ioaddr->feature_addr);
+                writeb(tf->nsect, (void __iomem *) ioaddr->nsect_addr);
+                writeb(tf->lbal, (void __iomem *) ioaddr->lbal_addr);
+                writeb(tf->lbam, (void __iomem *) ioaddr->lbam_addr);
+                writeb(tf->lbah, (void __iomem *) ioaddr->lbah_addr);
+                VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
+                        tf->feature,
+                        tf->nsect,
+                        tf->lbal,
+                        tf->lbam,
+                        tf->lbah);
+        }
+
+        if (tf->flags & ATA_TFLAG_DEVICE) {
+                writeb(tf->device, (void __iomem *) ioaddr->device_addr);
+                VPRINTK("device 0x%X\n", tf->device);
+        }
+
+        ata_wait_idle(ap);
+}
+
+
+/**
+ *      ata_tf_load - send taskfile registers to host controller
+ *      @ap: Port to which output is sent
+ *      @tf: ATA taskfile register set
+ *
+ *      Outputs ATA taskfile to standard ATA host controller using MMIO
+ *      or PIO as indicated by the ATA_FLAG_MMIO flag.
+ *      Writes the control, feature, nsect, lbal, lbam, and lbah registers.
+ *      Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
+ *      hob_lbal, hob_lbam, and hob_lbah.
+ *
+ *      This function waits for idle (!BUSY and !DRQ) after writing
+ *      registers.  If the control register has a new value, this
+ *      function also waits for idle after writing control and before
+ *      writing the remaining registers.
+ *
+ *      May be used as the tf_load() entry in ata_port_operations.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+        if (ap->flags & ATA_FLAG_MMIO)
+                ata_tf_load_mmio(ap, tf);
+        else
+                ata_tf_load_pio(ap, tf);
+}
+
+/**
+ *      ata_exec_command_pio - issue ATA command to host controller
+ *      @ap: port to which command is being issued
+ *      @tf: ATA taskfile register set
+ *
+ *      Issues PIO write to ATA command register, with proper
+ *      synchronization with interrupt handler / other threads.
+ *
+ *      LOCKING:
+ *      spin_lock_irqsave(host_set lock)
+ */
+
+static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+        DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
+
+        outb(tf->command, ap->ioaddr.command_addr);
+        ata_pause(ap);
+}
+
+
+/**
+ *      ata_exec_command_mmio - issue ATA command to host controller
+ *      @ap: port to which command is being issued
+ *      @tf: ATA taskfile register set
+ *
+ *      Issues MMIO write to ATA command register, with proper
+ *      synchronization with interrupt handler / other threads.
+ *
+ *      LOCKING:
+ *      spin_lock_irqsave(host_set lock)
+ */
+
+static void ata_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+        DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
+
+        writeb(tf->command, (void __iomem *) ap->ioaddr.command_addr);
+        ata_pause(ap);
+}
+
+
+/**
+ *      ata_exec_command - issue ATA command to host controller
+ *      @ap: port to which command is being issued
+ *      @tf: ATA taskfile register set
+ *
+ *      Issues PIO/MMIO write to ATA command register, with proper
+ *      synchronization with interrupt handler / other threads.
+ *
+ *      LOCKING:
+ *      spin_lock_irqsave(host_set lock)
+ */
+void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+        if (ap->flags & ATA_FLAG_MMIO)
+                ata_exec_command_mmio(ap, tf);
+        else
+                ata_exec_command_pio(ap, tf);
+}
+
+/**
+ *      ata_tf_read_pio - input device's ATA taskfile shadow registers
+ *      @ap: Port from which input is read
+ *      @tf: ATA taskfile register set for storing input
+ *
+ *      Reads ATA taskfile registers for currently-selected device
+ *      into @tf.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+
+static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf)
+{
+        struct ata_ioports *ioaddr = &ap->ioaddr;
+
+        tf->command = ata_check_status(ap);
+        tf->feature = inb(ioaddr->error_addr);
+        tf->nsect = inb(ioaddr->nsect_addr);
+        tf->lbal = inb(ioaddr->lbal_addr);
+        tf->lbam = inb(ioaddr->lbam_addr);
+        tf->lbah = inb(ioaddr->lbah_addr);
+        tf->device = inb(ioaddr->device_addr);
+
+        if (tf->flags & ATA_TFLAG_LBA48) {
+                outb(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
+                tf->hob_feature = inb(ioaddr->error_addr);
+                tf->hob_nsect = inb(ioaddr->nsect_addr);
+                tf->hob_lbal = inb(ioaddr->lbal_addr);
+                tf->hob_lbam = inb(ioaddr->lbam_addr);
+                tf->hob_lbah = inb(ioaddr->lbah_addr);
+        }
+}
+
+/**
+ *      ata_tf_read_mmio - input device's ATA taskfile shadow registers
+ *      @ap: Port from which input is read
+ *      @tf: ATA taskfile register set for storing input
+ *
+ *      Reads ATA taskfile registers for currently-selected device
+ *      into @tf via MMIO.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+
+static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf)
+{
+        struct ata_ioports *ioaddr = &ap->ioaddr;
+
+        tf->command = ata_check_status(ap);
+        tf->feature = readb((void __iomem *)ioaddr->error_addr);
+        tf->nsect = readb((void __iomem *)ioaddr->nsect_addr);
+        tf->lbal = readb((void __iomem *)ioaddr->lbal_addr);
+        tf->lbam = readb((void __iomem *)ioaddr->lbam_addr);
+        tf->lbah = readb((void __iomem *)ioaddr->lbah_addr);
+        tf->device = readb((void __iomem *)ioaddr->device_addr);
+
+        if (tf->flags & ATA_TFLAG_LBA48) {
+                writeb(tf->ctl | ATA_HOB, (void __iomem *) ap->ioaddr.ctl_addr);
+                tf->hob_feature = readb((void __iomem *)ioaddr->error_addr);
+                tf->hob_nsect = readb((void __iomem *)ioaddr->nsect_addr);
+                tf->hob_lbal = readb((void __iomem *)ioaddr->lbal_addr);
+                tf->hob_lbam = readb((void __iomem *)ioaddr->lbam_addr);
+                tf->hob_lbah = readb((void __iomem *)ioaddr->lbah_addr);
+        }
+}
+
+
+/**
+ *      ata_tf_read - input device's ATA taskfile shadow registers
+ *      @ap: Port from which input is read
+ *      @tf: ATA taskfile register set for storing input
+ *
+ *      Reads ATA taskfile registers for currently-selected device
+ *      into @tf.
+ *
+ *      Reads nsect, lbal, lbam, lbah, and device.  If ATA_TFLAG_LBA48
+ *      is set, also reads the hob registers.
+ *
+ *      May be used as the tf_read() entry in ata_port_operations.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+        if (ap->flags & ATA_FLAG_MMIO)
+                ata_tf_read_mmio(ap, tf);
+        else
+                ata_tf_read_pio(ap, tf);
+}
+
+/**
+ *      ata_check_status_pio - Read device status reg & clear interrupt
+ *      @ap: port where the device is
+ *
+ *      Reads ATA taskfile status register for currently-selected device
+ *      and return its value. This also clears pending interrupts
+ *      from this device
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+static u8 ata_check_status_pio(struct ata_port *ap)
+{
+        return inb(ap->ioaddr.status_addr);
+}
+
+/**
+ *      ata_check_status_mmio - Read device status reg & clear interrupt
+ *      @ap: port where the device is
+ *
+ *      Reads ATA taskfile status register for currently-selected device
+ *      via MMIO and return its value. This also clears pending interrupts
+ *      from this device
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+static u8 ata_check_status_mmio(struct ata_port *ap)
+{
+        return readb((void __iomem *) ap->ioaddr.status_addr);
+}
+
+
+/**
+ *      ata_check_status - Read device status reg & clear interrupt
+ *      @ap: port where the device is
+ *
+ *      Reads ATA taskfile status register for currently-selected device
+ *      and return its value. This also clears pending interrupts
+ *      from this device
+ *
+ *      May be used as the check_status() entry in ata_port_operations.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+u8 ata_check_status(struct ata_port *ap)
+{
+        if (ap->flags & ATA_FLAG_MMIO)
+                return ata_check_status_mmio(ap);
+        return ata_check_status_pio(ap);
+}
+
+
+/**
+ *      ata_altstatus - Read device alternate status reg
+ *      @ap: port where the device is
+ *
+ *      Reads ATA taskfile alternate status register for
+ *      currently-selected device and return its value.
+ *
+ *      Note: may NOT be used as the check_altstatus() entry in
+ *      ata_port_operations.
+ *
+ *      LOCKING:
+ *      Inherited from caller.
+ */
+u8 ata_altstatus(struct ata_port *ap)
+{
+        if (ap->ops->check_altstatus)
+                return ap->ops->check_altstatus(ap);
+
+        if (ap->flags & ATA_FLAG_MMIO)
+                return readb((void __iomem *)ap->ioaddr.altstatus_addr);
+        return inb(ap->ioaddr.altstatus_addr);
+}
+
+#ifdef CONFIG_PCI
+static struct ata_probe_ent *
+ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
+{
+        struct ata_probe_ent *probe_ent;
+
+        probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
+        if (!probe_ent) {
+                printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
+                       kobject_name(&(dev->kobj)));
+                return NULL;
+        }
+
+        INIT_LIST_HEAD(&probe_ent->node);
+        probe_ent->dev = dev;
+
+        probe_ent->sht = port->sht;
+        probe_ent->host_flags = port->host_flags;
+        probe_ent->pio_mask = port->pio_mask;
+        probe_ent->mwdma_mask = port->mwdma_mask;
+        probe_ent->udma_mask = port->udma_mask;
+        probe_ent->port_ops = port->port_ops;
+
+        return probe_ent;
+}
+
+
+/**
+ *      ata_pci_init_native_mode - Initialize native-mode driver
+ *      @pdev:  pci device to be initialized
+ *      @port:  array[2] of pointers to port info structures.
+ *      @ports: bitmap of ports present
+ *
+ *      Utility function which allocates and initializes an
+ *      ata_probe_ent structure for a standard dual-port
+ *      PIO-based IDE controller.  The returned ata_probe_ent
+ *      structure can be passed to ata_device_add().  The returned
+ *      ata_probe_ent structure should then be freed with kfree().
+ *
+ *      The caller need only pass the address of the primary port, the
+ *      secondary will be deduced automatically. If the device has non
+ *      standard secondary port mappings this function can be called twice,
+ *      once for each interface.
+ */
+
+struct ata_probe_ent *
+ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
+{
+        struct ata_probe_ent *probe_ent =
+                ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
+        int p = 0;
+
+        if (!probe_ent)
+                return NULL;
+
+        probe_ent->irq = pdev->irq;
+        probe_ent->irq_flags = SA_SHIRQ;
+        probe_ent->private_data = port[0]->private_data;
+
+        if (ports & ATA_PORT_PRIMARY) {
+                probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0);
+                probe_ent->port[p].altstatus_addr =
+                probe_ent->port[p].ctl_addr =
+                        pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
+                probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4);
+                ata_std_ports(&probe_ent->port[p]);
+                p++;
+        }
+
+        if (ports & ATA_PORT_SECONDARY) {
+                probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2);
+                probe_ent->port[p].altstatus_addr =
+                probe_ent->port[p].ctl_addr =
+                        pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
+                probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8;
+                ata_std_ports(&probe_ent->port[p]);
+                p++;
+        }
+
+        probe_ent->n_ports = p;
+        return probe_ent;
+}
+
+
+static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
+                                struct ata_port_info *port, int port_num)
+{
+        struct ata_probe_ent *probe_ent;
+
+        probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port);
+        if (!probe_ent)
+                return NULL;
+
+        probe_ent->legacy_mode = 1;
+        probe_ent->n_ports = 1;
+        probe_ent->hard_port_no = port_num;
+        probe_ent->private_data = port->private_data;
+
+        switch(port_num)
+        {
+                case 0:
+                        probe_ent->irq = 14;
+                        probe_ent->port[0].cmd_addr = 0x1f0;
+                        probe_ent->port[0].altstatus_addr =
+                        probe_ent->port[0].ctl_addr = 0x3f6;
+                        break;
+                case 1:
+                        probe_ent->irq = 15;
+                        probe_ent->port[0].cmd_addr = 0x170;
+                        probe_ent->port[0].altstatus_addr =
+                        probe_ent->port[0].ctl_addr = 0x376;
+                        break;
+        }
+
+        probe_ent->port[0].bmdma_addr =
+                pci_resource_start(pdev, 4) + 8 * port_num;
+        ata_std_ports(&probe_ent->port[0]);
+
+        return probe_ent;
+}
+
+
+/**
+ *      ata_pci_init_one - Initialize/register PCI IDE host controller
+ *      @pdev: Controller to be initialized
+ *      @port_info: Information from low-level host driver
+ *      @n_ports: Number of ports attached to host controller
+ *
+ *      This is a helper function which can be called from a driver's
+ *      xxx_init_one() probe function if the hardware uses traditional
+ *      IDE taskfile registers.
+ *
+ *      This function calls pci_enable_device(), reserves its register
+ *      regions, sets the dma mask, enables bus master mode, and calls
+ *      ata_device_add()
+ *
+ *      LOCKING:
+ *      Inherited from PCI layer (may sleep).
+ *
+ *      RETURNS:
+ *      Zero on success, negative on errno-based value on error.
+ */
+
+int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
+                      unsigned int n_ports)
+{
+        struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL;
+        struct ata_port_info *port[2];
+        u8 tmp8, mask;
+        unsigned int legacy_mode = 0;
+        int disable_dev_on_err = 1;
+        int rc;
+
+        DPRINTK("ENTER\n");
+
+        port[0] = port_info[0];
+        if (n_ports > 1)
+                port[1] = port_info[1];
+        else
+                port[1] = port[0];
+
+        if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0
+            && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
+                /* TODO: What if one channel is in native mode ... */
+                pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
+                mask = (1 << 2) | (1 << 0);
+                if ((tmp8 & mask) != mask)
+                        legacy_mode = (1 << 3);
+        }
+
+        /* FIXME... */
+        if ((!legacy_mode) && (n_ports > 2)) {
+                printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n");
+                n_ports = 2;
+                /* For now */
+        }
+
+        /* FIXME: Really for ATA it isn't safe because the device may be
+           multi-purpose and we want to leave it alone if it was already
+           enabled. Secondly for shared use as Arjan says we want refcounting
+
+           Checking dev->is_enabled is insufficient as this is not set at
+           boot for the primary video which is BIOS enabled
+         */
+
+        rc = pci_enable_device(pdev);
+        if (rc)
+                return rc;
+
+        rc = pci_request_regions(pdev, DRV_NAME);
+        if (rc) {
+                disable_dev_on_err = 0;
+                goto err_out;
+        }
+
+        /* FIXME: Should use platform specific mappers for legacy port ranges */
+        if (legacy_mode) {
+                if (!request_region(0x1f0, 8, "libata")) {
+                        struct resource *conflict, res;
+                        res.start = 0x1f0;
+                        res.end = 0x1f0 + 8 - 1;
+                        conflict = ____request_resource(&ioport_resource, &res);
+                        if (!strcmp(conflict->name, "libata"))
+                                legacy_mode |= (1 << 0);
+                        else {
+                                disable_dev_on_err = 0;
+                                printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n");
+                        }
+                } else
+                        legacy_mode |= (1 << 0);
+
+                if (!request_region(0x170, 8, "libata")) {
+                        struct resource *conflict, res;
+                        res.start = 0x170;
+                        res.end = 0x170 + 8 - 1;
+                        conflict = ____request_resource(&ioport_resource, &res);
+                        if (!strcmp(conflict->name, "libata"))
+                                legacy_mode |= (1 << 1);
+                        else {
+                                disable_dev_on_err = 0;
+                                printk(KERN_WARNING "ata: 0x170 IDE port busy\n");
+                        }
+                } else
+                        legacy_mode |= (1 << 1);
+        }
+
+        /* we have legacy mode, but all ports are unavailable */
+        if (legacy_mode == (1 << 3)) {
+                rc = -EBUSY;
+                goto err_out_regions;
+        }
+
+        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;
+
+        if (legacy_mode) {
+                if (legacy_mode & (1 << 0))
+                        probe_ent = ata_pci_init_legacy_port(pdev, port[0], 0);
+                if (legacy_mode & (1 << 1))
+                        probe_ent2 = ata_pci_init_legacy_port(pdev, port[1], 1);
+        } else {
+                if (n_ports == 2)
+                        probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
+                else
+                        probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
+        }
+        if (!probe_ent && !probe_ent2) {
+                rc = -ENOMEM;
+                goto err_out_regions;
+        }
+
+        pci_set_master(pdev);
+
+        /* FIXME: check ata_device_add return */
+        if (legacy_mode) {
+                if (legacy_mode & (1 << 0))
+                        ata_device_add(probe_ent);
+                if (legacy_mode & (1 << 1))
+                        ata_device_add(probe_ent2);
+        } else
+                ata_device_add(probe_ent);
+
+        kfree(probe_ent);
+        kfree(probe_ent2);
+
+        return 0;
+
+err_out_regions:
+        if (legacy_mode & (1 << 0))
+                release_region(0x1f0, 8);
+        if (legacy_mode & (1 << 1))
+                release_region(0x170, 8);
+        pci_release_regions(pdev);
+err_out:
+        if (disable_dev_on_err)
+                pci_disable_device(pdev);
+        return rc;
+}
+
+#endif /* CONFIG_PCI */
+