Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mtd / maps / solutionengine.c

diff --git a/kernel/drivers/mtd/maps/solutionengine.c b/kernel/drivers/mtd/maps/solutionengine.c
new file mode 100644 (file)
index 0000000..bb580bc
--- /dev/null
+++ b/kernel/drivers/mtd/maps/solutionengine.c
@@ -0,0 +1,95 @@
+/*
+ * Flash and EPROM on Hitachi Solution Engine and similar boards.
+ *
+ * (C) 2001 Red Hat, Inc.
+ *
+ * GPL'd
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/errno.h>
+
+static struct mtd_info *flash_mtd;
+static struct mtd_info *eprom_mtd;
+
+struct map_info soleng_eprom_map = {
+       .name = "Solution Engine EPROM",
+       .size = 0x400000,
+       .bankwidth = 4,
+};
+
+struct map_info soleng_flash_map = {
+       .name = "Solution Engine FLASH",
+       .size = 0x400000,
+       .bankwidth = 4,
+};
+
+static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };
+
+static int __init init_soleng_maps(void)
+{
+       /* First probe at offset 0 */
+       soleng_flash_map.phys = 0;
+       soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);
+       soleng_eprom_map.phys = 0x01000000;
+       soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);
+       simple_map_init(&soleng_eprom_map);
+       simple_map_init(&soleng_flash_map);
+
+       printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
+       flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
+       if (!flash_mtd) {
+               /* Not there. Try swapping */
+               printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");
+               soleng_flash_map.phys = 0x01000000;
+               soleng_flash_map.virt = P2SEGADDR(0x01000000);
+               soleng_eprom_map.phys = 0;
+               soleng_eprom_map.virt = P1SEGADDR(0);
+               flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
+               if (!flash_mtd) {
+                       /* Eep. */
+                       printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
+                       return -ENXIO;
+               }
+       }
+       printk(KERN_NOTICE "Solution Engine: Flash at 0x%08lx, EPROM at 0x%08lx\n",
+              soleng_flash_map.phys & 0x1fffffff,
+              soleng_eprom_map.phys & 0x1fffffff);
+       flash_mtd->owner = THIS_MODULE;
+
+       eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);
+       if (eprom_mtd) {
+               eprom_mtd->owner = THIS_MODULE;
+               mtd_device_register(eprom_mtd, NULL, 0);
+       }
+
+       mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0);
+
+       return 0;
+}
+
+static void __exit cleanup_soleng_maps(void)
+{
+       if (eprom_mtd) {
+               mtd_device_unregister(eprom_mtd);
+               map_destroy(eprom_mtd);
+       }
+
+       mtd_device_unregister(flash_mtd);
+       map_destroy(flash_mtd);
+}
+
+module_init(init_soleng_maps);
+module_exit(cleanup_soleng_maps);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");
+