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-rw-r--r--drivers/ide/ide-io-std.c262
1 files changed, 262 insertions, 0 deletions
diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c
new file mode 100644
index 000000000..94bdcf1ea
--- /dev/null
+++ b/drivers/ide/ide-io-std.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+
+#if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
+ defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
+#include <asm/ide.h>
+#else
+#include <asm-generic/ide_iops.h>
+#endif
+
+/*
+ * 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_write_devctl(ide_hwif_t *hwif, u8 ctl)
+{
+ 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_write_devctl);
+
+void ide_dev_select(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 select = drive->select | ATA_DEVICE_OBS;
+
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ writeb(select, (void __iomem *)hwif->io_ports.device_addr);
+ else
+ outb(select, hwif->io_ports.device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_dev_select);
+
+void ide_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ void (*tf_outb)(u8 addr, unsigned long port);
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ if (mmio)
+ tf_outb = ide_mm_outb;
+ else
+ tf_outb = ide_outb;
+
+ if (valid & IDE_VALID_FEATURE)
+ tf_outb(tf->feature, io_ports->feature_addr);
+ if (valid & IDE_VALID_NSECT)
+ tf_outb(tf->nsect, io_ports->nsect_addr);
+ if (valid & IDE_VALID_LBAL)
+ tf_outb(tf->lbal, io_ports->lbal_addr);
+ if (valid & IDE_VALID_LBAM)
+ tf_outb(tf->lbam, io_ports->lbam_addr);
+ if (valid & IDE_VALID_LBAH)
+ tf_outb(tf->lbah, io_ports->lbah_addr);
+ if (valid & IDE_VALID_DEVICE)
+ tf_outb(tf->device, io_ports->device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_tf_load);
+
+void ide_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ u8 (*tf_inb)(unsigned long port);
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ if (mmio)
+ tf_inb = ide_mm_inb;
+ else
+ tf_inb = ide_inb;
+
+ if (valid & IDE_VALID_ERROR)
+ tf->error = tf_inb(io_ports->feature_addr);
+ if (valid & IDE_VALID_NSECT)
+ tf->nsect = tf_inb(io_ports->nsect_addr);
+ if (valid & IDE_VALID_LBAL)
+ tf->lbal = tf_inb(io_ports->lbal_addr);
+ if (valid & IDE_VALID_LBAM)
+ tf->lbam = tf_inb(io_ports->lbam_addr);
+ if (valid & IDE_VALID_LBAH)
+ tf->lbah = tf_inb(io_ports->lbah_addr);
+ if (valid & IDE_VALID_DEVICE)
+ tf->device = tf_inb(io_ports->device_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 ide_cmd *cmd, 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;
+ unsigned int words = (len + 1) >> 1;
+ u8 io_32bit = drive->io_32bit;
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ if (io_32bit) {
+ unsigned long flags;
+
+ if ((io_32bit & 2) && !mmio) {
+ local_irq_save(flags);
+ ata_vlb_sync(io_ports->nsect_addr);
+ }
+
+ words >>= 1;
+ if (mmio)
+ __ide_mm_insl((void __iomem *)data_addr, buf, words);
+ else
+ insl(data_addr, buf, words);
+
+ if ((io_32bit & 2) && !mmio)
+ local_irq_restore(flags);
+
+ if (((len + 1) & 3) < 2)
+ return;
+
+ buf += len & ~3;
+ words = 1;
+ }
+
+ if (mmio)
+ __ide_mm_insw((void __iomem *)data_addr, buf, words);
+ else
+ insw(data_addr, buf, words);
+}
+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 ide_cmd *cmd, 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;
+ unsigned int words = (len + 1) >> 1;
+ u8 io_32bit = drive->io_32bit;
+ u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+ if (io_32bit) {
+ unsigned long flags;
+
+ if ((io_32bit & 2) && !mmio) {
+ local_irq_save(flags);
+ ata_vlb_sync(io_ports->nsect_addr);
+ }
+
+ words >>= 1;
+ if (mmio)
+ __ide_mm_outsl((void __iomem *)data_addr, buf, words);
+ else
+ outsl(data_addr, buf, words);
+
+ if ((io_32bit & 2) && !mmio)
+ local_irq_restore(flags);
+
+ if (((len + 1) & 3) < 2)
+ return;
+
+ buf += len & ~3;
+ words = 1;
+ }
+
+ if (mmio)
+ __ide_mm_outsw((void __iomem *)data_addr, buf, words);
+ else
+ outsw(data_addr, buf, words);
+}
+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,
+ .write_devctl = ide_write_devctl,
+
+ .dev_select = ide_dev_select,
+ .tf_load = ide_tf_load,
+ .tf_read = ide_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 00:32:14 +0000