Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 235 insertions, 0 deletions

diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
new file mode 100644
index 00000000000..edac4156d69
--- /dev/null
+++ b/drivers/mtd/devices/mtdram.c
@@ -0,0 +1,235 @@
+/*
+ * mtdram - a test mtd device
+ * $Id: mtdram.c,v 1.35 2005/01/05 18:05:12 dwmw2 Exp $
+ * Author: Alexander Larsson <alex@cendio.se>
+ *
+ * Copyright (c) 1999 Alexander Larsson <alex@cendio.se>
+ *
+ * This code is GPL
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/mtd/mtd.h>
+
+#ifndef CONFIG_MTDRAM_ABS_POS
+  #define CONFIG_MTDRAM_ABS_POS 0
+#endif
+
+#if CONFIG_MTDRAM_ABS_POS > 0
+  #include <asm/io.h>
+#endif
+
+#ifdef MODULE
+static unsigned long total_size = CONFIG_MTDRAM_TOTAL_SIZE;
+static unsigned long erase_size = CONFIG_MTDRAM_ERASE_SIZE;
+module_param(total_size,ulong,0);
+MODULE_PARM_DESC(total_size, "Total device size in KiB");
+module_param(erase_size,ulong,0);
+MODULE_PARM_DESC(erase_size, "Device erase block size in KiB");
+#define MTDRAM_TOTAL_SIZE (total_size * 1024)
+#define MTDRAM_ERASE_SIZE (erase_size * 1024)
+#else
+#define MTDRAM_TOTAL_SIZE (CONFIG_MTDRAM_TOTAL_SIZE * 1024)
+#define MTDRAM_ERASE_SIZE (CONFIG_MTDRAM_ERASE_SIZE * 1024)
+#endif
+
+
+// We could store these in the mtd structure, but we only support 1 device..
+static struct mtd_info *mtd_info;
+
+
+static int
+ram_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+  DEBUG(MTD_DEBUG_LEVEL2, "ram_erase(pos:%ld, len:%ld)\n", (long)instr->addr, (long)instr->len);
+  if (instr->addr + instr->len > mtd->size) {
+    DEBUG(MTD_DEBUG_LEVEL1, "ram_erase() out of bounds (%ld > %ld)\n", (long)(instr->addr + instr->len), (long)mtd->size);
+    return -EINVAL;
+  }
+	
+  memset((char *)mtd->priv + instr->addr, 0xff, instr->len);
+	
+  instr->state = MTD_ERASE_DONE;
+  mtd_erase_callback(instr);
+
+  return 0;
+}
+
+static int ram_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf)
+{
+  if (from + len > mtd->size)
+    return -EINVAL;
+	
+  *mtdbuf = mtd->priv + from;
+  *retlen = len;
+  return 0;
+}
+
+static void ram_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from,
+			 size_t len)
+{
+  DEBUG(MTD_DEBUG_LEVEL2, "ram_unpoint\n");
+}
+
+static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
+	     size_t *retlen, u_char *buf)
+{
+  DEBUG(MTD_DEBUG_LEVEL2, "ram_read(pos:%ld, len:%ld)\n", (long)from, (long)len);
+  if (from + len > mtd->size) {
+    DEBUG(MTD_DEBUG_LEVEL1, "ram_read() out of bounds (%ld > %ld)\n", (long)(from + len), (long)mtd->size);
+    return -EINVAL;
+  }
+
+  memcpy(buf, mtd->priv + from, len);
+
+  *retlen=len;
+  return 0;
+}
+
+static int ram_write(struct mtd_info *mtd, loff_t to, size_t len,
+	      size_t *retlen, const u_char *buf)
+{
+  DEBUG(MTD_DEBUG_LEVEL2, "ram_write(pos:%ld, len:%ld)\n", (long)to, (long)len);
+  if (to + len > mtd->size) {
+    DEBUG(MTD_DEBUG_LEVEL1, "ram_write() out of bounds (%ld > %ld)\n", (long)(to + len), (long)mtd->size);
+    return -EINVAL;
+  }
+
+  memcpy ((char *)mtd->priv + to, buf, len);
+
+  *retlen=len;
+  return 0;
+}
+
+static void __exit cleanup_mtdram(void)
+{
+  if (mtd_info) {
+    del_mtd_device(mtd_info);
+#if CONFIG_MTDRAM_TOTAL_SIZE > 0
+    if (mtd_info->priv)
+#if CONFIG_MTDRAM_ABS_POS > 0
+      iounmap(mtd_info->priv);
+#else
+      vfree(mtd_info->priv);
+#endif	
+#endif
+    kfree(mtd_info);
+  }
+}
+
+int mtdram_init_device(struct mtd_info *mtd, void *mapped_address, 
+                       unsigned long size, char *name)
+{
+   memset(mtd, 0, sizeof(*mtd));
+
+   /* Setup the MTD structure */
+   mtd->name = name;
+   mtd->type = MTD_RAM;
+   mtd->flags = MTD_CAP_RAM;
+   mtd->size = size;
+   mtd->erasesize = MTDRAM_ERASE_SIZE;
+   mtd->priv = mapped_address;
+
+   mtd->owner = THIS_MODULE;
+   mtd->erase = ram_erase;
+   mtd->point = ram_point;
+   mtd->unpoint = ram_unpoint;
+   mtd->read = ram_read;
+   mtd->write = ram_write;
+
+   if (add_mtd_device(mtd)) {
+     return -EIO;
+   }
+   
+   return 0;
+}
+
+#if CONFIG_MTDRAM_TOTAL_SIZE > 0
+#if CONFIG_MTDRAM_ABS_POS > 0
+static int __init init_mtdram(void)
+{
+  void *addr;
+  int err;
+  /* Allocate some memory */
+   mtd_info = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
+   if (!mtd_info)
+     return -ENOMEM;
+   
+  addr = ioremap(CONFIG_MTDRAM_ABS_POS, MTDRAM_TOTAL_SIZE);
+  if (!addr) {
+    DEBUG(MTD_DEBUG_LEVEL1, 
+          "Failed to ioremap) memory region of size %ld at ABS_POS:%ld\n", 
+          (long)MTDRAM_TOTAL_SIZE, (long)CONFIG_MTDRAM_ABS_POS);
+    kfree(mtd_info);
+    mtd_info = NULL;
+    return -ENOMEM;
+  }
+  err = mtdram_init_device(mtd_info, addr, 
+                           MTDRAM_TOTAL_SIZE, "mtdram test device");
+  if (err) 
+  {
+    iounmap(addr);
+    kfree(mtd_info);
+    mtd_info = NULL;
+    return err;
+  }
+  memset(mtd_info->priv, 0xff, MTDRAM_TOTAL_SIZE);
+  return err;
+}
+
+#else /* CONFIG_MTDRAM_ABS_POS > 0 */
+
+static int __init init_mtdram(void)
+{
+  void *addr;
+  int err;
+  /* Allocate some memory */
+   mtd_info = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
+   if (!mtd_info)
+     return -ENOMEM;
+
+  addr = vmalloc(MTDRAM_TOTAL_SIZE);
+  if (!addr) {
+    DEBUG(MTD_DEBUG_LEVEL1, 
+          "Failed to vmalloc memory region of size %ld\n", 
+          (long)MTDRAM_TOTAL_SIZE);
+    kfree(mtd_info);
+    mtd_info = NULL;
+    return -ENOMEM;
+  }
+  err = mtdram_init_device(mtd_info, addr, 
+                           MTDRAM_TOTAL_SIZE, "mtdram test device");
+  if (err) 
+  {
+    vfree(addr);
+    kfree(mtd_info);
+    mtd_info = NULL;
+    return err;
+  }
+  memset(mtd_info->priv, 0xff, MTDRAM_TOTAL_SIZE);
+  return err;
+}
+#endif /* !(CONFIG_MTDRAM_ABS_POS > 0) */
+
+#else /* CONFIG_MTDRAM_TOTAL_SIZE > 0 */
+
+static int __init init_mtdram(void)
+{
+  return 0;
+}
+#endif /* !(CONFIG_MTDRAM_TOTAL_SIZE > 0) */
+
+module_init(init_mtdram);
+module_exit(cleanup_mtdram);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alexander Larsson <alexl@redhat.com>");
+MODULE_DESCRIPTION("Simulated MTD driver for testing");
+