From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/ata/pata_of_platform.c | 94 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 drivers/ata/pata_of_platform.c

(limited to 'drivers/ata/pata_of_platform.c')

diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
new file mode 100644
index 000000000..b6b7af894
--- /dev/null
+++ b/drivers/ata/pata_of_platform.c
@@ -0,0 +1,94 @@
+/*
+ * OF-platform PATA driver
+ *
+ * Copyright (c) 2007  MontaVista Software, Inc.
+ *                     Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_of_platform"
+
+static struct scsi_host_template pata_platform_sht = {
+	ATA_PIO_SHT(DRV_NAME),
+};
+
+static int pata_of_platform_probe(struct platform_device *ofdev)
+{
+	int ret;
+	struct device_node *dn = ofdev->dev.of_node;
+	struct resource io_res;
+	struct resource ctl_res;
+	struct resource *irq_res;
+	unsigned int reg_shift = 0;
+	int pio_mode = 0;
+	int pio_mask;
+	const u32 *prop;
+
+	ret = of_address_to_resource(dn, 0, &io_res);
+	if (ret) {
+		dev_err(&ofdev->dev, "can't get IO address from "
+			"device tree\n");
+		return -EINVAL;
+	}
+
+	ret = of_address_to_resource(dn, 1, &ctl_res);
+	if (ret) {
+		dev_err(&ofdev->dev, "can't get CTL address from "
+			"device tree\n");
+		return -EINVAL;
+	}
+
+	irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0);
+
+	prop = of_get_property(dn, "reg-shift", NULL);
+	if (prop)
+		reg_shift = be32_to_cpup(prop);
+
+	prop = of_get_property(dn, "pio-mode", NULL);
+	if (prop) {
+		pio_mode = be32_to_cpup(prop);
+		if (pio_mode > 6) {
+			dev_err(&ofdev->dev, "invalid pio-mode\n");
+			return -EINVAL;
+		}
+	} else {
+		dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n");
+	}
+
+	pio_mask = 1 << pio_mode;
+	pio_mask |= (1 << pio_mode) - 1;
+
+	return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res,
+				     reg_shift, pio_mask, &pata_platform_sht);
+}
+
+static struct of_device_id pata_of_platform_match[] = {
+	{ .compatible = "ata-generic", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, pata_of_platform_match);
+
+static struct platform_driver pata_of_platform_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = pata_of_platform_match,
+	},
+	.probe		= pata_of_platform_probe,
+	.remove		= ata_platform_remove_one,
+};
+
+module_platform_driver(pata_of_platform_driver);
+
+MODULE_DESCRIPTION("OF-platform PATA driver");
+MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
+MODULE_LICENSE("GPL");
-- 
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