v4.19.13 snapshot.
diff --git a/drivers/ide/ide_platform.c b/drivers/ide/ide_platform.c
new file mode 100644
index 0000000..2b43be3
--- /dev/null
+++ b/drivers/ide/ide_platform.c
@@ -0,0 +1,137 @@
+/*
+ * Platform IDE driver
+ *
+ * Copyright (C) 2007 MontaVista Software
+ *
+ * Maintainer: Kumar Gala <galak@kernel.crashing.org>
+ *
+ * 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 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/ata_platform.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base,
+ void __iomem *ctrl,
+ struct pata_platform_info *pdata, int irq)
+{
+ unsigned long port = (unsigned long)base;
+ int i;
+
+ hw->io_ports.data_addr = port;
+
+ port += (1 << pdata->ioport_shift);
+ for (i = 1; i <= 7;
+ i++, port += (1 << pdata->ioport_shift))
+ hw->io_ports_array[i] = port;
+
+ hw->io_ports.ctl_addr = (unsigned long)ctrl;
+
+ hw->irq = irq;
+}
+
+static const struct ide_port_info platform_ide_port_info = {
+ .host_flags = IDE_HFLAG_NO_DMA,
+ .chipset = ide_generic,
+};
+
+static int plat_ide_probe(struct platform_device *pdev)
+{
+ struct resource *res_base, *res_alt, *res_irq;
+ void __iomem *base, *alt_base;
+ struct pata_platform_info *pdata;
+ struct ide_host *host;
+ int ret = 0, mmio = 0;
+ struct ide_hw hw, *hws[] = { &hw };
+ struct ide_port_info d = platform_ide_port_info;
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ /* get a pointer to the register memory */
+ res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
+
+ if (!res_base || !res_alt) {
+ res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res_base || !res_alt) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ mmio = 1;
+ }
+
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_irq) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (mmio) {
+ base = devm_ioremap(&pdev->dev,
+ res_base->start, resource_size(res_base));
+ alt_base = devm_ioremap(&pdev->dev,
+ res_alt->start, resource_size(res_alt));
+ } else {
+ base = devm_ioport_map(&pdev->dev,
+ res_base->start, resource_size(res_base));
+ alt_base = devm_ioport_map(&pdev->dev,
+ res_alt->start, resource_size(res_alt));
+ }
+
+ memset(&hw, 0, sizeof(hw));
+ plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
+ hw.dev = &pdev->dev;
+
+ d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
+ if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
+ d.irq_flags |= IRQF_SHARED;
+
+ if (mmio)
+ d.host_flags |= IDE_HFLAG_MMIO;
+
+ ret = ide_host_add(&d, hws, 1, &host);
+ if (ret)
+ goto out;
+
+ platform_set_drvdata(pdev, host);
+
+ return 0;
+
+out:
+ return ret;
+}
+
+static int plat_ide_remove(struct platform_device *pdev)
+{
+ struct ide_host *host = dev_get_drvdata(&pdev->dev);
+
+ ide_host_remove(host);
+
+ return 0;
+}
+
+static struct platform_driver platform_ide_driver = {
+ .driver = {
+ .name = "pata_platform",
+ },
+ .probe = plat_ide_probe,
+ .remove = plat_ide_remove,
+};
+
+module_platform_driver(platform_ide_driver);
+
+MODULE_DESCRIPTION("Platform IDE driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pata_platform");