1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
new file mode 100644
index 0000000000..0f77e04240
--- /dev/null
+++ b/drivers/ata/pata_isapnp.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ *   pata-isapnp.c - ISA PnP PATA controller driver.
+ *   Copyright 2005/2006 Red Hat Inc, all rights reserved.
+ *
+ *   Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/ata.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_isapnp"
+#define DRV_VERSION "0.2.5"
+
+static const struct scsi_host_template isapnp_sht = {
+	ATA_PIO_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations isapnp_port_ops = {
+	.inherits	= &ata_sff_port_ops,
+	.cable_detect	= ata_cable_40wire,
+};
+
+static struct ata_port_operations isapnp_noalt_port_ops = {
+	.inherits	= &ata_sff_port_ops,
+	.cable_detect	= ata_cable_40wire,
+	/* No altstatus so we don't want to use the lost interrupt poll */
+	.lost_interrupt = ATA_OP_NULL,
+};
+
+/**
+ *	isapnp_init_one		-	attach an isapnp interface
+ *	@idev: PnP device
+ *	@dev_id: matching detect line
+ *
+ *	Register an ISA bus IDE interface. Such interfaces are PIO 0 and
+ *	non shared IRQ.
+ */
+
+static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
+{
+	struct ata_host *host;
+	struct ata_port *ap;
+	void __iomem *cmd_addr, *ctl_addr;
+	int irq = 0;
+	irq_handler_t handler = NULL;
+
+	if (pnp_port_valid(idev, 0) == 0)
+		return -ENODEV;
+
+	if (pnp_irq_valid(idev, 0)) {
+		irq = pnp_irq(idev, 0);
+		handler = ata_sff_interrupt;
+	}
+
+	/* allocate host */
+	host = ata_host_alloc(&idev->dev, 1);
+	if (!host)
+		return -ENOMEM;
+
+	/* acquire resources and fill host */
+	cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
+	if (!cmd_addr)
+		return -ENOMEM;
+
+	ap = host->ports[0];
+
+	ap->ops = &isapnp_noalt_port_ops;
+	ap->pio_mask = ATA_PIO0;
+	ap->flags |= ATA_FLAG_SLAVE_POSS;
+
+	ap->ioaddr.cmd_addr = cmd_addr;
+
+	if (pnp_port_valid(idev, 1)) {
+		ctl_addr = devm_ioport_map(&idev->dev,
+					   pnp_port_start(idev, 1), 1);
+		if (!ctl_addr)
+			return -ENOMEM;
+
+		ap->ioaddr.altstatus_addr = ctl_addr;
+		ap->ioaddr.ctl_addr = ctl_addr;
+		ap->ops = &isapnp_port_ops;
+	}
+
+	ata_sff_std_ports(&ap->ioaddr);
+
+	ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
+		      (unsigned long long)pnp_port_start(idev, 0),
+		      (unsigned long long)pnp_port_start(idev, 1));
+
+	/* activate */
+	return ata_host_activate(host, irq, handler, 0,
+				 &isapnp_sht);
+}
+
+/**
+ *	isapnp_remove_one	-	unplug an isapnp interface
+ *	@idev: PnP device
+ *
+ *	Remove a previously configured PnP ATA port. Called only on module
+ *	unload events as the core does not currently deal with ISAPnP docking.
+ */
+
+static void isapnp_remove_one(struct pnp_dev *idev)
+{
+	struct device *dev = &idev->dev;
+	struct ata_host *host = dev_get_drvdata(dev);
+
+	ata_host_detach(host);
+}
+
+static struct pnp_device_id isapnp_devices[] = {
+  	/* Generic ESDI/IDE/ATA compatible hard disk controller */
+	{.id = "PNP0600", .driver_data = 0},
+	{.id = ""}
+};
+
+MODULE_DEVICE_TABLE(pnp, isapnp_devices);
+
+static struct pnp_driver isapnp_driver = {
+	.name		= DRV_NAME,
+	.id_table	= isapnp_devices,
+	.probe		= isapnp_init_one,
+	.remove		= isapnp_remove_one,
+};
+
+module_pnp_driver(isapnp_driver);
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);