+/**
+ * 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_to_host - issue ATA taskfile to host controller
+ * @ap: port to which command is being issued
+ * @tf: ATA taskfile register set
+ *
+ * Issues ATA taskfile register set to ATA host controller,
+ * with proper synchronization with interrupt handler and
+ * other threads.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
+static inline void ata_tf_to_host(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ ap->ops->tf_load(ap, tf);
+ ap->ops->exec_command(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);
+}
+