1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/mtd/maps/rbtx4939-flash.c b/drivers/mtd/maps/rbtx4939-flash.c
new file mode 100644
index 000000000..39c86c0b0
--- /dev/null
+++ b/drivers/mtd/maps/rbtx4939-flash.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * rbtx4939-flash (based on physmap.c)
+ *
+ * This is a simplified physmap driver with map_init callback function.
+ *
+ * Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <asm/txx9/rbtx4939.h>
+
+struct rbtx4939_flash_info {
+	struct mtd_info *mtd;
+	struct map_info map;
+};
+
+static int rbtx4939_flash_remove(struct platform_device *dev)
+{
+	struct rbtx4939_flash_info *info;
+
+	info = platform_get_drvdata(dev);
+	if (!info)
+		return 0;
+
+	if (info->mtd) {
+		mtd_device_unregister(info->mtd);
+		map_destroy(info->mtd);
+	}
+	return 0;
+}
+
+static const char * const rom_probe_types[] = {
+	"cfi_probe", "jedec_probe", NULL };
+
+static int rbtx4939_flash_probe(struct platform_device *dev)
+{
+	struct rbtx4939_flash_data *pdata;
+	struct rbtx4939_flash_info *info;
+	struct resource *res;
+	const char * const *probe_type;
+	int err = 0;
+	unsigned long size;
+
+	pdata = dev_get_platdata(&dev->dev);
+	if (!pdata)
+		return -ENODEV;
+
+	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+	info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info),
+			    GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	platform_set_drvdata(dev, info);
+
+	size = resource_size(res);
+	pr_notice("rbtx4939 platform flash device: %pR\n", res);
+
+	if (!devm_request_mem_region(&dev->dev, res->start, size,
+				     dev_name(&dev->dev)))
+		return -EBUSY;
+
+	info->map.name = dev_name(&dev->dev);
+	info->map.phys = res->start;
+	info->map.size = size;
+	info->map.bankwidth = pdata->width;
+
+	info->map.virt = devm_ioremap(&dev->dev, info->map.phys, size);
+	if (!info->map.virt)
+		return -EBUSY;
+
+	if (pdata->map_init)
+		(*pdata->map_init)(&info->map);
+	else
+		simple_map_init(&info->map);
+
+	probe_type = rom_probe_types;
+	for (; !info->mtd && *probe_type; probe_type++)
+		info->mtd = do_map_probe(*probe_type, &info->map);
+	if (!info->mtd) {
+		dev_err(&dev->dev, "map_probe failed\n");
+		err = -ENXIO;
+		goto err_out;
+	}
+	info->mtd->dev.parent = &dev->dev;
+	err = mtd_device_register(info->mtd, pdata->parts, pdata->nr_parts);
+
+	if (err)
+		goto err_out;
+	return 0;
+
+err_out:
+	rbtx4939_flash_remove(dev);
+	return err;
+}
+
+#ifdef CONFIG_PM
+static void rbtx4939_flash_shutdown(struct platform_device *dev)
+{
+	struct rbtx4939_flash_info *info = platform_get_drvdata(dev);
+
+	if (mtd_suspend(info->mtd) == 0)
+		mtd_resume(info->mtd);
+}
+#else
+#define rbtx4939_flash_shutdown NULL
+#endif
+
+static struct platform_driver rbtx4939_flash_driver = {
+	.probe		= rbtx4939_flash_probe,
+	.remove		= rbtx4939_flash_remove,
+	.shutdown	= rbtx4939_flash_shutdown,
+	.driver		= {
+		.name	= "rbtx4939-flash",
+	},
+};
+
+module_platform_driver(rbtx4939_flash_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("RBTX4939 MTD map driver");
+MODULE_ALIAS("platform:rbtx4939-flash");