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/mtd/maps/pxa2xx-flash.c | 144 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 drivers/mtd/maps/pxa2xx-flash.c

(limited to 'drivers/mtd/maps/pxa2xx-flash.c')

diff --git a/drivers/mtd/maps/pxa2xx-flash.c b/drivers/mtd/maps/pxa2xx-flash.c
new file mode 100644
index 000000000..12fa75df5
--- /dev/null
+++ b/drivers/mtd/maps/pxa2xx-flash.c
@@ -0,0 +1,144 @@
+/*
+ * Map driver for Intel XScale PXA2xx platforms.
+ *
+ * Author:	Nicolas Pitre
+ * Copyright:	(C) 2001 MontaVista Software Inc.
+ *
+ * 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/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <mach/hardware.h>
+
+#include <asm/mach/flash.h>
+
+#define CACHELINESIZE	32
+
+static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
+				      ssize_t len)
+{
+	unsigned long start = (unsigned long)map->cached + from;
+	unsigned long end = start + len;
+
+	start &= ~(CACHELINESIZE - 1);
+	while (start < end) {
+		/* invalidate D cache line */
+		asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
+		start += CACHELINESIZE;
+	}
+}
+
+struct pxa2xx_flash_info {
+	struct mtd_info		*mtd;
+	struct map_info		map;
+};
+
+static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };
+
+static int pxa2xx_flash_probe(struct platform_device *pdev)
+{
+	struct flash_platform_data *flash = dev_get_platdata(&pdev->dev);
+	struct pxa2xx_flash_info *info;
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->map.name = flash->name;
+	info->map.bankwidth = flash->width;
+	info->map.phys = res->start;
+	info->map.size = resource_size(res);
+
+	info->map.virt = ioremap(info->map.phys, info->map.size);
+	if (!info->map.virt) {
+		printk(KERN_WARNING "Failed to ioremap %s\n",
+		       info->map.name);
+		return -ENOMEM;
+	}
+	info->map.cached =
+		ioremap_cache(info->map.phys, info->map.size);
+	if (!info->map.cached)
+		printk(KERN_WARNING "Failed to ioremap cached %s\n",
+		       info->map.name);
+	info->map.inval_cache = pxa2xx_map_inval_cache;
+	simple_map_init(&info->map);
+
+	printk(KERN_NOTICE
+	       "Probing %s at physical address 0x%08lx"
+	       " (%d-bit bankwidth)\n",
+	       info->map.name, (unsigned long)info->map.phys,
+	       info->map.bankwidth * 8);
+
+	info->mtd = do_map_probe(flash->map_name, &info->map);
+
+	if (!info->mtd) {
+		iounmap((void *)info->map.virt);
+		if (info->map.cached)
+			iounmap(info->map.cached);
+		return -EIO;
+	}
+	info->mtd->owner = THIS_MODULE;
+
+	mtd_device_parse_register(info->mtd, probes, NULL, flash->parts,
+				  flash->nr_parts);
+
+	platform_set_drvdata(pdev, info);
+	return 0;
+}
+
+static int pxa2xx_flash_remove(struct platform_device *dev)
+{
+	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
+
+	mtd_device_unregister(info->mtd);
+
+	map_destroy(info->mtd);
+	iounmap(info->map.virt);
+	if (info->map.cached)
+		iounmap(info->map.cached);
+	kfree(info);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static void pxa2xx_flash_shutdown(struct platform_device *dev)
+{
+	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
+
+	if (info && mtd_suspend(info->mtd) == 0)
+		mtd_resume(info->mtd);
+}
+#else
+#define pxa2xx_flash_shutdown NULL
+#endif
+
+static struct platform_driver pxa2xx_flash_driver = {
+	.driver = {
+		.name		= "pxa2xx-flash",
+	},
+	.probe		= pxa2xx_flash_probe,
+	.remove		= pxa2xx_flash_remove,
+	.shutdown	= pxa2xx_flash_shutdown,
+};
+
+module_platform_driver(pxa2xx_flash_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
+MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");
-- 
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