ide: move standard I/O code to ide-io-std.c
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c
new file mode 100644
index 0000000..45b43dd
--- /dev/null
+++ b/drivers/ide/ide-io-std.c
@@ -0,0 +1,316 @@
+
+#include <linux/kernel.h>
+#include <linux/ide.h>
+
+/*
+ * Conventional PIO operations for ATA devices
+ */
+
+static u8 ide_inb(unsigned long port)
+{
+ return (u8) inb(port);
+}
+
+static void ide_outb(u8 val, unsigned long port)
+{
+ outb(val, port);
+}
+
+/*
+ * MMIO operations, typically used for SATA controllers
+ */
+
+static u8 ide_mm_inb(unsigned long port)
+{
+ return (u8) readb((void __iomem *) port);
+}
+
+static void ide_mm_outb(u8 value, unsigned long port)
+{
+ writeb(value, (void __iomem *) port);
+}
+
+void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
+{
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
+ else
+ outb(cmd, hwif->io_ports.command_addr);
+}
+EXPORT_SYMBOL_GPL(ide_exec_command);
+
+u8 ide_read_status(ide_hwif_t *hwif)
+{
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ return readb((void __iomem *)hwif->io_ports.status_addr);
+ else
+ return inb(hwif->io_ports.status_addr);
+}
+EXPORT_SYMBOL_GPL(ide_read_status);
+
+u8 ide_read_altstatus(ide_hwif_t *hwif)
+{
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ return readb((void __iomem *)hwif->io_ports.ctl_addr);
+ else
+ return inb(hwif->io_ports.ctl_addr);
+}
+EXPORT_SYMBOL_GPL(ide_read_altstatus);
+
+void ide_set_irq(ide_hwif_t *hwif, int on)
+{
+ u8 ctl = ATA_DEVCTL_OBS;
+
+ if (on == 4) { /* hack for SRST */
+ ctl |= 4;
+ on &= ~4;
+ }
+
+ ctl |= on ? 0 : 2;
+
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+ else
+ outb(ctl, hwif->io_ports.ctl_addr);
+}
+EXPORT_SYMBOL_GPL(ide_set_irq);
+
+void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ struct ide_taskfile *tf = &task->tf;
+ void (*tf_outb)(u8 addr, unsigned long port);
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+ u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
+
+ if (mmio)
+ tf_outb = ide_mm_outb;
+ else
+ tf_outb = ide_outb;
+
+ if (task->tf_flags & IDE_TFLAG_FLAGGED)
+ HIHI = 0xFF;
+
+ if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
+ u16 data = (tf->hob_data << 8) | tf->data;
+
+ if (mmio)
+ writew(data, (void __iomem *)io_ports->data_addr);
+ else
+ outw(data, io_ports->data_addr);
+ }
+
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
+ tf_outb(tf->hob_feature, io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
+ tf_outb(tf->hob_nsect, io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
+ tf_outb(tf->hob_lbal, io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
+ tf_outb(tf->hob_lbam, io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
+ tf_outb(tf->hob_lbah, io_ports->lbah_addr);
+
+ if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
+ tf_outb(tf->feature, io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
+ tf_outb(tf->nsect, io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
+ tf_outb(tf->lbal, io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
+ tf_outb(tf->lbam, io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
+ tf_outb(tf->lbah, io_ports->lbah_addr);
+
+ if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
+ tf_outb((tf->device & HIHI) | drive->select,
+ io_ports->device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_tf_load);
+
+void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ struct ide_taskfile *tf = &task->tf;
+ void (*tf_outb)(u8 addr, unsigned long port);
+ u8 (*tf_inb)(unsigned long port);
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ if (mmio) {
+ tf_outb = ide_mm_outb;
+ tf_inb = ide_mm_inb;
+ } else {
+ tf_outb = ide_outb;
+ tf_inb = ide_inb;
+ }
+
+ if (task->tf_flags & IDE_TFLAG_IN_DATA) {
+ u16 data;
+
+ if (mmio)
+ data = readw((void __iomem *)io_ports->data_addr);
+ else
+ data = inw(io_ports->data_addr);
+
+ tf->data = data & 0xff;
+ tf->hob_data = (data >> 8) & 0xff;
+ }
+
+ /* be sure we're looking at the low order bits */
+ tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
+
+ if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
+ tf->feature = tf_inb(io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+ tf->nsect = tf_inb(io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+ tf->lbal = tf_inb(io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+ tf->lbam = tf_inb(io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+ tf->lbah = tf_inb(io_ports->lbah_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+ tf->device = tf_inb(io_ports->device_addr);
+
+ if (task->tf_flags & IDE_TFLAG_LBA48) {
+ tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
+
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+ tf->hob_feature = tf_inb(io_ports->feature_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+ tf->hob_nsect = tf_inb(io_ports->nsect_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+ tf->hob_lbal = tf_inb(io_ports->lbal_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+ tf->hob_lbam = tf_inb(io_ports->lbam_addr);
+ if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+ tf->hob_lbah = tf_inb(io_ports->lbah_addr);
+ }
+}
+EXPORT_SYMBOL_GPL(ide_tf_read);
+
+/*
+ * Some localbus EIDE interfaces require a special access sequence
+ * when using 32-bit I/O instructions to transfer data. We call this
+ * the "vlb_sync" sequence, which consists of three successive reads
+ * of the sector count register location, with interrupts disabled
+ * to ensure that the reads all happen together.
+ */
+static void ata_vlb_sync(unsigned long port)
+{
+ (void)inb(port);
+ (void)inb(port);
+ (void)inb(port);
+}
+
+/*
+ * This is used for most PIO data transfers *from* the IDE interface
+ *
+ * These routines will round up any request for an odd number of bytes,
+ * so if an odd len is specified, be sure that there's at least one
+ * extra byte allocated for the buffer.
+ */
+void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
+ unsigned int len)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ unsigned long data_addr = io_ports->data_addr;
+ u8 io_32bit = drive->io_32bit;
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ len++;
+
+ if (io_32bit) {
+ unsigned long uninitialized_var(flags);
+
+ if ((io_32bit & 2) && !mmio) {
+ local_irq_save(flags);
+ ata_vlb_sync(io_ports->nsect_addr);
+ }
+
+ if (mmio)
+ __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
+ else
+ insl(data_addr, buf, len / 4);
+
+ if ((io_32bit & 2) && !mmio)
+ local_irq_restore(flags);
+
+ if ((len & 3) >= 2) {
+ if (mmio)
+ __ide_mm_insw((void __iomem *)data_addr,
+ (u8 *)buf + (len & ~3), 1);
+ else
+ insw(data_addr, (u8 *)buf + (len & ~3), 1);
+ }
+ } else {
+ if (mmio)
+ __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
+ else
+ insw(data_addr, buf, len / 2);
+ }
+}
+EXPORT_SYMBOL_GPL(ide_input_data);
+
+/*
+ * This is used for most PIO data transfers *to* the IDE interface
+ */
+void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
+ unsigned int len)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ unsigned long data_addr = io_ports->data_addr;
+ u8 io_32bit = drive->io_32bit;
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ len++;
+
+ if (io_32bit) {
+ unsigned long uninitialized_var(flags);
+
+ if ((io_32bit & 2) && !mmio) {
+ local_irq_save(flags);
+ ata_vlb_sync(io_ports->nsect_addr);
+ }
+
+ if (mmio)
+ __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
+ else
+ outsl(data_addr, buf, len / 4);
+
+ if ((io_32bit & 2) && !mmio)
+ local_irq_restore(flags);
+
+ if ((len & 3) >= 2) {
+ if (mmio)
+ __ide_mm_outsw((void __iomem *)data_addr,
+ (u8 *)buf + (len & ~3), 1);
+ else
+ outsw(data_addr, (u8 *)buf + (len & ~3), 1);
+ }
+ } else {
+ if (mmio)
+ __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
+ else
+ outsw(data_addr, buf, len / 2);
+ }
+}
+EXPORT_SYMBOL_GPL(ide_output_data);
+
+const struct ide_tp_ops default_tp_ops = {
+ .exec_command = ide_exec_command,
+ .read_status = ide_read_status,
+ .read_altstatus = ide_read_altstatus,
+
+ .set_irq = ide_set_irq,
+
+ .tf_load = ide_tf_load,
+ .tf_read = ide_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};