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/ocelot.c b/drivers/mtd/maps/ocelot.c
new file mode 100644
index 0000000..82c3070
--- /dev/null
+++ b/drivers/mtd/maps/ocelot.c
@@ -0,0 +1,175 @@
+/*
+ * $Id: ocelot.c,v 1.16 2005/01/05 18:05:13 dwmw2 Exp $
+ *
+ * Flash on Momenco Ocelot
+ */
+
+#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>
+
+#define OCELOT_PLD 0x2c000000
+#define FLASH_WINDOW_ADDR 0x2fc00000
+#define FLASH_WINDOW_SIZE 0x00080000
+#define FLASH_BUSWIDTH 1
+#define NVRAM_WINDOW_ADDR 0x2c800000
+#define NVRAM_WINDOW_SIZE 0x00007FF0
+#define NVRAM_BUSWIDTH 1
+
+static unsigned int cacheflush = 0;
+
+static struct mtd_info *flash_mtd;
+static struct mtd_info *nvram_mtd;
+
+static void ocelot_ram_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+ struct map_info *map = mtd->priv;
+ size_t done = 0;
+
+ /* If we use memcpy, it does word-wide writes. Even though we told the
+ GT64120A that it's an 8-bit wide region, word-wide writes don't work.
+ We end up just writing the first byte of the four to all four bytes.
+ So we have this loop instead */
+ *retlen = len;
+ while(len) {
+ __raw_writeb(*(unsigned char *) from, map->virt + to);
+ from++;
+ to++;
+ len--;
+ }
+}
+
+static struct mtd_partition *parsed_parts;
+
+struct map_info ocelot_flash_map = {
+ .name = "Ocelot boot flash",
+ .size = FLASH_WINDOW_SIZE,
+ .bankwidth = FLASH_BUSWIDTH,
+ .phys = FLASH_WINDOW_ADDR,
+};
+
+struct map_info ocelot_nvram_map = {
+ .name = "Ocelot NVRAM",
+ .size = NVRAM_WINDOW_SIZE,
+ .bankwidth = NVRAM_BUSWIDTH,
+ .phys = NVRAM_WINDOW_ADDR,
+};
+
+static const char *probes[] = { "RedBoot", NULL };
+
+static int __init init_ocelot_maps(void)
+{
+ void *pld;
+ int nr_parts;
+ unsigned char brd_status;
+
+ printk(KERN_INFO "Momenco Ocelot MTD mappings: Flash 0x%x at 0x%x, NVRAM 0x%x at 0x%x\n",
+ FLASH_WINDOW_SIZE, FLASH_WINDOW_ADDR, NVRAM_WINDOW_SIZE, NVRAM_WINDOW_ADDR);
+
+ /* First check whether the flash jumper is present */
+ pld = ioremap(OCELOT_PLD, 0x10);
+ if (!pld) {
+ printk(KERN_NOTICE "Failed to ioremap Ocelot PLD\n");
+ return -EIO;
+ }
+ brd_status = readb(pld+4);
+ iounmap(pld);
+
+ /* Now ioremap the NVRAM space */
+ ocelot_nvram_map.virt = ioremap_nocache(NVRAM_WINDOW_ADDR, NVRAM_WINDOW_SIZE);
+ if (!ocelot_nvram_map.virt) {
+ printk(KERN_NOTICE "Failed to ioremap Ocelot NVRAM space\n");
+ return -EIO;
+ }
+
+ simple_map_init(&ocelot_nvram_map);
+
+ /* And do the RAM probe on it to get an MTD device */
+ nvram_mtd = do_map_probe("map_ram", &ocelot_nvram_map);
+ if (!nvram_mtd) {
+ printk("NVRAM probe failed\n");
+ goto fail_1;
+ }
+ nvram_mtd->owner = THIS_MODULE;
+ nvram_mtd->erasesize = 16;
+ /* Override the write() method */
+ nvram_mtd->write = ocelot_ram_write;
+
+ /* Now map the flash space */
+ ocelot_flash_map.virt = ioremap_nocache(FLASH_WINDOW_ADDR, FLASH_WINDOW_SIZE);
+ if (!ocelot_flash_map.virt) {
+ printk(KERN_NOTICE "Failed to ioremap Ocelot flash space\n");
+ goto fail_2;
+ }
+ /* Now the cached version */
+ ocelot_flash_map.cached = (unsigned long)__ioremap(FLASH_WINDOW_ADDR, FLASH_WINDOW_SIZE, 0);
+
+ simple_map_init(&ocelot_flash_map);
+
+ /* Only probe for flash if the write jumper is present */
+ if (brd_status & 0x40) {
+ flash_mtd = do_map_probe("jedec", &ocelot_flash_map);
+ } else {
+ printk(KERN_NOTICE "Ocelot flash write jumper not present. Treating as ROM\n");
+ }
+ /* If that failed or the jumper's absent, pretend it's ROM */
+ if (!flash_mtd) {
+ flash_mtd = do_map_probe("map_rom", &ocelot_flash_map);
+ /* If we're treating it as ROM, set the erase size */
+ if (flash_mtd)
+ flash_mtd->erasesize = 0x10000;
+ }
+ if (!flash_mtd)
+ goto fail3;
+
+ add_mtd_device(nvram_mtd);
+
+ flash_mtd->owner = THIS_MODULE;
+ nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0);
+
+ if (nr_parts > 0)
+ add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
+ else
+ add_mtd_device(flash_mtd);
+
+ return 0;
+
+ fail3:
+ iounmap((void *)ocelot_flash_map.virt);
+ if (ocelot_flash_map.cached)
+ iounmap((void *)ocelot_flash_map.cached);
+ fail_2:
+ map_destroy(nvram_mtd);
+ fail_1:
+ iounmap((void *)ocelot_nvram_map.virt);
+
+ return -ENXIO;
+}
+
+static void __exit cleanup_ocelot_maps(void)
+{
+ del_mtd_device(nvram_mtd);
+ map_destroy(nvram_mtd);
+ iounmap((void *)ocelot_nvram_map.virt);
+
+ if (parsed_parts)
+ del_mtd_partitions(flash_mtd);
+ else
+ del_mtd_device(flash_mtd);
+ map_destroy(flash_mtd);
+ iounmap((void *)ocelot_flash_map.virt);
+ if (ocelot_flash_map.cached)
+ iounmap((void *)ocelot_flash_map.cached);
+}
+
+module_init(init_ocelot_maps);
+module_exit(cleanup_ocelot_maps);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Red Hat, Inc. - David Woodhouse <dwmw2@cambridge.redhat.com>");
+MODULE_DESCRIPTION("MTD map driver for Momenco Ocelot board");