CFE-ready mtd driver, needs fixing though, update kernel config

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6617 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 188 insertions, 9 deletions

diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c b/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c
index a9e97cb31..2bbb238c3 100644
--- a/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c
+++ b/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c
@@ -1,7 +1,8 @@
 /*
  *	Flash device on the ADM5120 board
  *
- *	Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005
+ *	Copyright Florian Fainelli <florian@openwrt.org>
+ *   
  *
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU General Public License version
@@ -13,43 +14,221 @@
 #include <linux/kernel.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/vmalloc.h>
+
 
 #define FLASH_PHYS_ADDR		0x1FC00000
-#define FLASH_SIZE 		0x200000  
+#define FLASH_SIZE 		0x400000
+
+#define IMAGE_LEN 		10                   	/* Length of Length Field */
+#define ADDRESS_LEN 		12                 	/* Length of Address field */
+#define EXTENDED_SIZE 		0xBFC00000       	/* Extended flash address */
+#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
+ 
 
 static struct mtd_info *adm5120_mtd;
+static struct mtd_partition *parsed_parts;
 
 static struct map_info adm5120_mtd_map = {
-	.name = "ADM5120",
+	.name = "adm5120",
 	.size = FLASH_SIZE,
 	.bankwidth = 2,
 	.phys = FLASH_PHYS_ADDR,
 };
 
+static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
+{
+	int nrparts = 2, curpart = 0; // CFE and NVRAM always present.
+	struct adm5120_cfe_map {
+		unsigned char tagVersion[4];                            // Version of the image tag
+		unsigned char sig_1[20];                                // Company Line 1
+		unsigned char sig_2[14];                                // Company Line 2
+		unsigned char chipid[6];                                        // Chip this image is for
+		unsigned char boardid[16];                              // Board name
+		unsigned char bigEndian[2];                             // Map endianness -- 1 BE 0 LE
+		unsigned char totalLength[IMAGE_LEN];           //Total length of image
+		unsigned char cfeAddress[ADDRESS_LEN];  // Address in memory of CFE
+		unsigned char cfeLength[IMAGE_LEN];             // Size of CFE
+		unsigned char rootAddress[ADDRESS_LEN];         // Address in memory of rootfs
+		unsigned char rootLength[IMAGE_LEN];            // Size of rootfs
+		unsigned char kernelAddress[ADDRESS_LEN];       // Address in memory of kernel
+		unsigned char kernelLength[IMAGE_LEN];  // Size of kernel
+		unsigned char dualImage[2];                             // Unused at present
+		unsigned char inactiveFlag[2];                  // Unused at present
+		unsigned char reserved1[74];                            // Reserved area not in use
+		unsigned char imageCRC[4];                              // CRC32 of images
+		unsigned char reserved2[16];                            // Unused at present
+		unsigned char headerCRC[4];                             // CRC32 of header excluding tagVersion
+		unsigned char reserved3[16];                            // Unused at present
+	} *buf;
+	struct mtd_partition *parts;
+	int ret;
+	size_t retlen;
+	unsigned int rootfsaddr, kerneladdr, spareaddr;
+	unsigned int rootfslen, kernellen, sparelen, totallen;
+	int namelen = 0;
+	int i;
+	// Allocate memory for buffer
+	buf = vmalloc(sizeof(struct adm5120_cfe_map));
+
+	if (!buf)
+		return -ENOMEM;
+
+	// Get the tag
+	ret = master->read(master,master->erasesize,sizeof(struct adm5120_cfe_map), &retlen, (void *)buf);
+
+	if (retlen != sizeof(struct adm5120_cfe_map)){
+		vfree(buf);
+		return -EIO;
+	};
+
+	printk("adm5120: CFE boot tag found with version %s and board type %s.\n",buf->tagVersion,buf->boardid);
+	// Get the values and calculate
+	sscanf(buf->rootAddress,"%u", &rootfsaddr);
+	rootfsaddr = rootfsaddr - EXTENDED_SIZE;
+	sscanf(buf->rootLength, "%u", &rootfslen);
+	sscanf(buf->kernelAddress, "%u", &kerneladdr);
+	kerneladdr = kerneladdr - EXTENDED_SIZE;
+	sscanf(buf->kernelLength, "%u", &kernellen);
+	sscanf(buf->totalLength, "%u", &totallen);
+	spareaddr = ROUNDUP(totallen,master->erasesize) + master->erasesize;
+	sparelen = master->size - spareaddr - master->erasesize;
+	// Determine number of partitions
+	namelen = 8;
+	if (rootfslen > 0){
+		nrparts++;
+		namelen =+ 6;
+	};
+
+	if (kernellen > 0){
+		nrparts++;
+		namelen =+ 6;
+	};
+	if (sparelen > 0){
+		nrparts++;
+		namelen =+ 6;
+	};
+	// Ask kernel for more memory.
+	parts = kmalloc(sizeof(*parts)*nrparts+10*nrparts, GFP_KERNEL);
+	if (!parts){
+		vfree(buf);
+		return -ENOMEM;
+	};
+	memset(parts,0,sizeof(*parts)*nrparts+10*nrparts);
+	// Start building partition list
+	parts[curpart].name = "CFE";
+	parts[curpart].offset = 0;
+	parts[curpart].size = master->erasesize;
+	curpart++;
+	if (kernellen > 0) {
+		parts[curpart].name = "Kernel";
+		parts[curpart].offset = kerneladdr;
+		parts[curpart].size = kernellen;
+		curpart++;
+	};
+	if (rootfslen > 0) {
+		parts[curpart].name = "Rootfs";
+		parts[curpart].offset = rootfsaddr;
+		parts[curpart].size = rootfslen;
+		curpart++;
+	};
+	if (sparelen > 0){
+		parts[curpart].name = "OpenWrt";
+		parts[curpart].offset = spareaddr;
+		parts[curpart].size = sparelen;
+		curpart++;
+	};
+	parts[curpart].name = "NVRAM";
+	parts[curpart].offset = master->size - master->erasesize;
+	parts[curpart].size = master->erasesize;
+	for (i = 0; i < nrparts; i++) {
+		printk("adm5120: Partition %d is %s offset %x and length %x\n", i, parts[i].name, parts[i].offset, parts[i].size);
+	}
+	*pparts = parts;
+	vfree(buf);
+	return nrparts;
+};
+
+static int adm5120_detect_cfe(struct mtd_info *master)
+{
+	int idoffset = 0x4e0;
+#ifdef CONFIG_CPU_BIG_ENDIAN
+	static char idstring[8] = "CFE1CFE1";
+#else
+	static char idstring[8] = "1EFC1EFC";
+#endif
+	char buf[8];
+	int ret;
+	size_t retlen;
+
+	ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
+	printk("adm5120: Read Signature value of %s\n", buf);
+	return strcmp(idstring,buf);
+}
+
 static int __init adm5120_mtd_init(void)
 {
-	printk(KERN_INFO "ADM5120 board flash (0x%x at 0x%x)\n", FLASH_SIZE,
+	printk(KERN_INFO "ADM5120 board flash (0x%08x at 0x%08x)\n", FLASH_SIZE,
 	    FLASH_PHYS_ADDR);
-	adm5120_mtd_map.virt = ioremap_nocache(FLASH_PHYS_ADDR, FLASH_SIZE);
+
+	adm5120_mtd_map.virt = ioremap(FLASH_PHYS_ADDR, FLASH_SIZE);
+
+	if (!adm5120_mtd_map.virt) {
+		printk("ADM5120: failed to ioremap\n");
+		return -EIO;
+	}
+		
 	simple_map_init(&adm5120_mtd_map);
+
 	adm5120_mtd = do_map_probe("cfi_probe", &adm5120_mtd_map);
+
 	if (adm5120_mtd) {
 		adm5120_mtd->owner = THIS_MODULE;
-		add_mtd_device(adm5120_mtd);
+		
+		if (adm5120_detect_cfe(adm5120_mtd) == 0)
+		{
+			int parsed_nr_parts = 0;
+			char * part_type;
+
+			printk("adm5120: CFE bootloader detected\n");
+			
+			if (parsed_nr_parts == 0) {
+				int ret = parse_cfe_partitions(adm5120_mtd, &parsed_parts);
+				
+				if (ret > 0) {
+					part_type = "CFE";
+					parsed_nr_parts = ret;
+				}
+			}
+			add_mtd_partitions(adm5120_mtd, parsed_parts, parsed_nr_parts);
+			return 0;
+		} else {
+			add_mtd_device(adm5120_mtd);
+		}
 		return 0;
 	}
+	iounmap(adm5120_mtd);
 	return -ENXIO;
 }
 
 static void __exit adm5120_mtd_exit(void)
 {
-	del_mtd_device(adm5120_mtd);
-	map_destroy(adm5120_mtd);
+	if (adm5120_mtd) {
+		del_mtd_device(adm5120_mtd);
+		map_destroy(adm5120_mtd);
+	}
+
+	if (adm5120_mtd_map.virt) {
+		iounmap(adm5120_mtd_map.virt);
+		adm5120_mtd_map.virt = 0;
+	}
+	
 }
 
 module_init(adm5120_mtd_init);
 module_exit(adm5120_mtd_exit);
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
 MODULE_DESCRIPTION("MTD map driver for ADM5120 boards");