Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/mtd/maps/walnut.c b/drivers/mtd/maps/walnut.c
new file mode 100644
index 0000000..d6137b1
--- /dev/null
+++ b/drivers/mtd/maps/walnut.c
@@ -0,0 +1,122 @@
+/*
+ * $Id: walnut.c,v 1.2 2004/12/10 12:07:42 holindho Exp $
+ *
+ * Mapping for Walnut flash
+ * (used ebony.c as a "framework")
+ *
+ * Heikki Lindholm <holindho@infradead.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/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/config.h>
+#include <linux/version.h>
+#include <asm/io.h>
+#include <asm/ibm4xx.h>
+#include <platforms/4xx/walnut.h>
+
+/* these should be in platforms/4xx/walnut.h ? */
+#define WALNUT_FLASH_ONBD_N(x) (x & 0x02)
+#define WALNUT_FLASH_SRAM_SEL(x) (x & 0x01)
+#define WALNUT_FLASH_LOW 0xFFF00000
+#define WALNUT_FLASH_HIGH 0xFFF80000
+#define WALNUT_FLASH_SIZE 0x80000
+
+static struct mtd_info *flash;
+
+static struct map_info walnut_map = {
+ .name = "Walnut flash",
+ .size = WALNUT_FLASH_SIZE,
+ .bankwidth = 1,
+};
+
+/* Actually, OpenBIOS is the last 128 KiB of the flash - better
+ * partitioning could be made */
+static struct mtd_partition walnut_partitions[] = {
+ {
+ .name = "OpenBIOS",
+ .offset = 0x0,
+ .size = WALNUT_FLASH_SIZE,
+ /*.mask_flags = MTD_WRITEABLE, */ /* force read-only */
+ }
+};
+
+int __init init_walnut(void)
+{
+ u8 fpga_brds1;
+ void *fpga_brds1_adr;
+ void *fpga_status_adr;
+ unsigned long flash_base;
+
+ /* this should already be mapped (platform/4xx/walnut.c) */
+ fpga_status_adr = ioremap(WALNUT_FPGA_BASE, 8);
+ if (!fpga_status_adr)
+ return -ENOMEM;
+
+ fpga_brds1_adr = fpga_status_adr+5;
+ fpga_brds1 = readb(fpga_brds1_adr);
+ /* iounmap(fpga_status_adr); */
+
+ if (WALNUT_FLASH_ONBD_N(fpga_brds1)) {
+ printk("The on-board flash is disabled (U79 sw 5)!");
+ return -EIO;
+ }
+ if (WALNUT_FLASH_SRAM_SEL(fpga_brds1))
+ flash_base = WALNUT_FLASH_LOW;
+ else
+ flash_base = WALNUT_FLASH_HIGH;
+
+ walnut_map.phys = flash_base;
+ walnut_map.virt =
+ (void __iomem *)ioremap(flash_base, walnut_map.size);
+
+ if (!walnut_map.virt) {
+ printk("Failed to ioremap flash.\n");
+ return -EIO;
+ }
+
+ simple_map_init(&walnut_map);
+
+ flash = do_map_probe("jedec_probe", &walnut_map);
+ if (flash) {
+ flash->owner = THIS_MODULE;
+ add_mtd_partitions(flash, walnut_partitions,
+ ARRAY_SIZE(walnut_partitions));
+ } else {
+ printk("map probe failed for flash\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static void __exit cleanup_walnut(void)
+{
+ if (flash) {
+ del_mtd_partitions(flash);
+ map_destroy(flash);
+ }
+
+ if (walnut_map.virt) {
+ iounmap((void *)walnut_map.virt);
+ walnut_map.virt = 0;
+ }
+}
+
+module_init(init_walnut);
+module_exit(cleanup_walnut);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Heikki Lindholm <holindho@infradead.org>");
+MODULE_DESCRIPTION("MTD map and partitions for IBM 405GP Walnut boards");