patch-2.4.6 linux/drivers/mtd/maps/dbox2-flash.c

• Lines: 152
• Date: Tue Jun 12 10:30:27 2001
• Orig file: v2.4.5/linux/drivers/mtd/maps/dbox2-flash.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/maps/dbox2-flash.c linux/drivers/mtd/maps/dbox2-flash.c
@@ -0,0 +1,151 @@
+/*
+ * $Id: dbox2-flash.c,v 1.2 2001/04/26 15:42:43 dwmw2 Exp $
+ *
+ * Nokia / Sagem D-Box 2 flash driver
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/config.h>
+
+/* partition_info gives details on the logical partitions that the split the
+ * single flash device into. If the size if zero we use up to the end of the
+ * device. */
+static struct mtd_partition partition_info[]= {{name: "BR bootloader",		// raw
+						      size: 128 * 1024, 
+						      offset: 0,                  
+						      mask_flags: MTD_WRITEABLE},
+                                                     {name: "PPC bootloader",		// flfs
+						      size: 128 * 1024, 
+						      offset: MTDPART_OFS_APPEND, 
+						      mask_flags: 0},
+                                                     {name: "Kernel",			// idxfs
+						      size: 768 * 1024, 
+						      offset: MTDPART_OFS_APPEND, 
+						      mask_flags: 0},
+                                                     {name: "System",			// jffs
+						      size: MTDPART_SIZ_FULL, 
+						      offset: MTDPART_OFS_APPEND, 
+						      mask_flags: 0}};
+
+#define NUM_PARTITIONS (sizeof(partition_info) / sizeof(partition_info[0]))
+
+#define WINDOW_ADDR 0x10000000
+#define WINDOW_SIZE 0x800000
+
+static struct mtd_info *mymtd;
+
+__u8 dbox2_flash_read8(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readb(map->map_priv_1 + ofs);
+}
+
+__u16 dbox2_flash_read16(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readw(map->map_priv_1 + ofs);
+}
+
+__u32 dbox2_flash_read32(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readl(map->map_priv_1 + ofs);
+}
+
+void dbox2_flash_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void dbox2_flash_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	__raw_writeb(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void dbox2_flash_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	__raw_writew(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void dbox2_flash_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	__raw_writel(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void dbox2_flash_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+struct map_info dbox2_flash_map = {
+	name: "D-Box 2 flash memory",
+	size: WINDOW_SIZE,
+	buswidth: 4,
+	read8: dbox2_flash_read8,
+	read16: dbox2_flash_read16,
+	read32: dbox2_flash_read32,
+	copy_from: dbox2_flash_copy_from,
+	write8: dbox2_flash_write8,
+	write16: dbox2_flash_write16,
+	write32: dbox2_flash_write32,
+	copy_to: dbox2_flash_copy_to
+};
+
+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
+#define init_dbox2_flash init_module
+#define cleanup_dbox2_flash cleanup_module
+#endif
+
+mod_init_t init_dbox2_flash(void)
+{
+       	printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
+	dbox2_flash_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
+
+	if (!dbox2_flash_map.map_priv_1) {
+		printk("Failed to ioremap\n");
+		return -EIO;
+	}
+
+	// Probe for dual Intel 28F320 or dual AMD
+	mymtd = do_map_probe("cfi", &dbox2_flash_map);
+	if (!mymtd) {
+	    // Probe for single Intel 28F640
+	    dbox2_flash_map.buswidth = 2;
+	
+	    mymtd = do_map_probe("cfi", &dbox2_flash_map);
+	}
+	    
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+
+                /* Create MTD devices for each partition. */
+	        add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
+		
+		return 0;
+	}
+
+	iounmap((void *)dbox2_flash_map.map_priv_1);
+	return -ENXIO;
+}
+
+mod_exit_t cleanup_dbox2_flash(void)
+{
+	if (mymtd) {
+		del_mtd_partitions(mymtd);
+		map_destroy(mymtd);
+	}
+	if (dbox2_flash_map.map_priv_1) {
+		iounmap((void *)dbox2_flash_map.map_priv_1);
+		dbox2_flash_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_dbox2_flash);
+module_exit(cleanup_dbox2_flash);
+