[brcm63xx] bcm63xx MTD driver cleanup and fixes:

- convert to platform_driver
- get the window_size/addr from the board setup code
- indentation fixes
- remove duplicate code
- move bcm_tag declaration out of the MTD driver


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13379 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 227 insertions, 231 deletions

diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/boards/board_bcm963xx.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/boards/board_bcm963xx.c
index 1c3073efda..5623d79025 100644
--- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/boards/board_bcm963xx.c
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/boards/board_bcm963xx.c
@@ -312,20 +312,6 @@ static int board_get_mac_address(u8 *mac)
 	return 0;
 }
 
-static struct mtd_partition mtd_partitions[] = {
-	{
-		.name		= "cfe",
-		.offset		= 0x0,
-		.size		= 0x40000,
-	}
-};
-
-static struct physmap_flash_data flash_data = {
-	.width			= 2,
-	.nr_parts		= ARRAY_SIZE(mtd_partitions),
-	.parts			= mtd_partitions,
-};
-
 static struct resource mtd_resources[] = {
 	{
 		.start		= 0,	/* filled at runtime */
@@ -335,12 +321,9 @@ static struct resource mtd_resources[] = {
 };
 
 static struct platform_device mtd_dev = {
-	.name			= "physmap-flash",
+	.name			= "bcm963xx-flash",
 	.resource		= mtd_resources,
 	.num_resources		= ARRAY_SIZE(mtd_resources),
-	.dev			= {
-		.platform_data	= &flash_data,
-	},
 };
 
 /*
diff --git a/target/linux/brcm63xx/files/drivers/mtd/maps/bcm963xx-flash.c b/target/linux/brcm63xx/files/drivers/mtd/maps/bcm963xx-flash.c
index dc1508b6f4..0d5bd84ec4 100644
--- a/target/linux/brcm63xx/files/drivers/mtd/maps/bcm963xx-flash.c
+++ b/target/linux/brcm63xx/files/drivers/mtd/maps/bcm963xx-flash.c
@@ -1,8 +1,6 @@
 /*
- * $Id$
- * Copyright (C) 2006  Florian Fainelli <florian@openwrt.org>
- * 			Mike Albon <malbon@openwrt.org>
- * Copyright (C) $Date$  $Author$
+ * Copyright (C) 2006-2008  Florian Fainelli <florian@openwrt.org>
+ * 			    Mike Albon <malbon@openwrt.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
@@ -19,252 +17,237 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-/* This is the BCM963xx flash map driver, in its actual state it only supports BCM96348 devices
- * this driver is able to manage both bootloader we found on these boards : CFE and RedBoot
- *
- * RedBoot :
- *  - this bootloader allows us to parse partitions and therefore deduce the MTD partition table
- *
- * CFE :
- *   - CFE partitionning can be detected as for BCM947xx devices 
- *
- */
-
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/vmalloc.h>
+#include <linux/platform_device.h>
 
+#include <bcm_tag.h>
 #include <asm/io.h>
 
-#define WINDOW_ADDR 0x1FC00000         /* Real address of the flash */
-#define WINDOW_SIZE 0x400000           /* Size of flash */
 #define BUSWIDTH 2                     /* Buswidth */
 #define EXTENDED_SIZE 0xBFC00000       /* Extended flash address */
-#define IMAGE_LEN 10                   /* Length of Length Field */
-#define ADDRESS_LEN 12                 /* Length of Address field */
-#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
 
-extern int boot_loader_type;           /* For RedBoot / CFE detection */
+#define PFX KBUILD_MODNAME ": "
+
 extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
 static struct mtd_partition *parsed_parts;
 
-static void __exit bcm963xx_mtd_cleanup(void);
-
 static struct mtd_info *bcm963xx_mtd_info;
 
 static struct map_info bcm963xx_map = {
-       .name = "bcm963xx",
-       .size = WINDOW_SIZE,
-       .bankwidth = BUSWIDTH,
-       .phys = WINDOW_ADDR,
+       .name		= "bcm963xx",
+       .bankwidth	= BUSWIDTH,
 };
 
-
-int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
+static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
 {
-       int nrparts = 2, curpart = 0; // CFE and NVRAM always present.
-       struct bcm963xx_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 bcm963xx_cfe_map));
-
-       if (!buf)
-               return -ENOMEM;
-
-       // Get the tag
-       ret = master->read(master,master->erasesize,sizeof(struct bcm963xx_cfe_map), &retlen, (void *)buf);
-       if (retlen != sizeof(struct bcm963xx_cfe_map)){
-               vfree(buf);
-               return -EIO;
-       };
-       printk("bcm963xx: 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;
-       };
-       // 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;
-               if (sparelen > 0)
-                       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("bcm963xx: 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 struct mtd_partition bcm963xx_parts[] = {
-        { name: "bootloader",  size: 0,        offset: 0,      mask_flags: MTD_WRITEABLE },
-        { name: "rootfs",              size: 0,        offset: 0},
-        { name: "jffs2",        size: 5 * 0x10000,      offset: 57*0x10000}
+	int nrparts = 2, curpart = 0; /* CFE and NVRAM are always present. */
+	struct bcm_tag *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 bcm_tag));
+	if (!buf)
+		return -ENOMEM;
+
+	/* Get the tag */
+	ret = master->read(master,master->erasesize,sizeof(struct bcm_tag), &retlen, (void *)buf);
+	if (retlen != sizeof(struct bcm_tag)){
+		vfree(buf);
+		return -EIO;
+	}
+	printk(KERN_INFO PFX "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;
+	};
+
+	/* Ask kernel for more memory */
+	parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
+	if (!parts) {
+		vfree(buf);
+		return -ENOMEM;
+	};
+	
+	/* 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;
+		if (sparelen > 0)
+			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(KERN_INFO PFX "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 bcm963xx_parts_size = sizeof(bcm963xx_parts) / sizeof(bcm963xx_parts[0]);
-
 static int bcm963xx_detect_cfe(struct mtd_info *master)
 {
-       int idoffset = 0x4e0;
-       static char idstring[8] = "CFE1CFE1";
-       char buf[9];
-       int ret;
-       size_t retlen;
-
-       ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
-       buf[retlen] = 0;
-       printk("bcm963xx: Read Signature value of %s\n", buf);
-       return strncmp(idstring, buf, 8);
+	int idoffset = 0x4e0;
+	static char idstring[8] = "CFE1CFE1";
+	char buf[9];
+	int ret;
+	size_t retlen;
+
+	ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
+	buf[retlen] = 0;
+	printk(KERN_INFO PFX "Read Signature value of %s\n", buf);
+	
+	return strncmp(idstring, buf, 8);
 }
 
-static int __init bcm963xx_mtd_init(void)
+static int bcm963xx_probe(struct platform_device *pdev)
 {
-       printk("bcm963xx: 0x%08x at 0x%08x\n", WINDOW_SIZE, WINDOW_ADDR);
-       bcm963xx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
-
-       if (!bcm963xx_map.virt) {
-               printk("bcm963xx: Failed to ioremap\n");
-               return -EIO;
-       }
-
-       simple_map_init(&bcm963xx_map);
-
-       bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
-
-       if (bcm963xx_mtd_info) {
-               bcm963xx_mtd_info->owner = THIS_MODULE;
-
-               //if (boot_loader_type == BOOT_CFE)
-               if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0)
-               {
-                       int parsed_nr_parts = 0;
-                       char * part_type;
-                       printk("bcm963xx: CFE bootloader detected\n");
-                       //add_mtd_device(bcm963xx_mtd_info);
-                       //add_mtd_partitions(bcm963xx_mtd_info, bcm963xx_parts, bcm963xx_parts_size);
-                       if (parsed_nr_parts == 0) {
-                               int ret = parse_cfe_partitions(bcm963xx_mtd_info, &parsed_parts);
-                               if (ret > 0) {
-                                       part_type = "CFE";
-                                       parsed_nr_parts = ret;
-                               }
-                       }
-                       add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
-                       return 0;
-               }
-               else
-               {
-                       int parsed_nr_parts = 0;
-                       char * part_type;
-
-                       if (bcm963xx_mtd_info->size > 0x00400000) {
-                               printk("Support for extended flash memory size : 0x%08X ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
-                               bcm963xx_map.virt = (unsigned long)(EXTENDED_SIZE);
-                       }
+	int err = 0;
+	int parsed_nr_parts = 0;
+	char *part_type;
+	struct resource *r;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 
+	bcm963xx_map.phys = r->start;
+	bcm963xx_map.size = (r->end - r->start);
+	bcm963xx_map.virt = ioremap(r->start, r->end - r->start);
+
+	if (!bcm963xx_map.virt) {
+		printk(KERN_ERR PFX "Failed to ioremap\n");
+		return -EIO;
+	}
+	printk(KERN_INFO PFX "0x%08x at 0x%08x\n", r->end - r->start, r->start);
+
+	simple_map_init(&bcm963xx_map);
+
+	bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
+	if (!bcm963xx_mtd_info) {
+		printk(KERN_ERR PFX "Failed to probe using CFI\n");
+		err = -EIO;
+		goto err_probe;
+	}
+
+	bcm963xx_mtd_info->owner = THIS_MODULE;
+
+	/* This is mutually exclusive */
+	if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0) {
+		printk(KERN_INFO PFX "CFE bootloader detected\n");
+		if (parsed_nr_parts == 0) {
+			int ret = parse_cfe_partitions(bcm963xx_mtd_info, &parsed_parts);
+			if (ret > 0) {
+				part_type = "CFE";
+				parsed_nr_parts = ret;
+			}
+		}
+	} else {
+		printk(KERN_INFO PFX "assuming RedBoot bootloader\n");
+		if (bcm963xx_mtd_info->size > 0x00400000) {
+			printk(KERN_INFO PFX "Support for extended flash memory size : 0x%08X ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
+			bcm963xx_map.virt = (u32)(EXTENDED_SIZE);
+		}
 
 #ifdef CONFIG_MTD_REDBOOT_PARTS
-                       if (parsed_nr_parts == 0) {
-                               int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
-                               if (ret > 0) {
-                                       part_type = "RedBoot";
-                                       parsed_nr_parts = ret;
-                               }
-                       }
+		if (parsed_nr_parts == 0) {
+			int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
+			if (ret > 0) {
+				part_type = "RedBoot";
+				parsed_nr_parts = ret;
+			}
+		}
 #endif
-                       add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
+	}
+	
+	return add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
 
-                       return 0;
-               }
-       }
-       iounmap(bcm963xx_map.virt);
-       return -ENXIO;
+err_probe:
+	iounmap(bcm963xx_map.virt);
+	return err;
+}
+
+static int bcm963xx_remove(struct platform_device *pdev)
+{
+	if (bcm963xx_mtd_info) {
+		del_mtd_partitions(bcm963xx_mtd_info);
+		map_destroy(bcm963xx_mtd_info);
+	}
+
+	if (bcm963xx_map.virt) {
+		iounmap(bcm963xx_map.virt);
+		bcm963xx_map.virt = 0;
+	}
+
+	return 0;
+}
+
+static struct platform_driver bcm63xx_mtd_dev = {
+	.probe	= bcm963xx_probe,
+	.remove = bcm963xx_remove,
+	.driver = {
+		.name	= "bcm963xx-flash",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init bcm963xx_mtd_init(void)
+{
+	return platform_driver_register(&bcm63xx_mtd_dev);
 }
 
-static void __exit bcm963xx_mtd_cleanup(void)
+static void __exit bcm963xx_mtd_exit(void)
 {
-       if (bcm963xx_mtd_info) {
-               del_mtd_partitions(bcm963xx_mtd_info);
-               map_destroy(bcm963xx_mtd_info);
-       }
-
-       if (bcm963xx_map.virt) {
-               iounmap(bcm963xx_map.virt);
-               bcm963xx_map.virt = 0;
-       }
+	platform_driver_unregister(&bcm63xx_mtd_dev);
 }
 
 module_init(bcm963xx_mtd_init);
-module_exit(bcm963xx_mtd_cleanup);
+module_exit(bcm963xx_mtd_exit);
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org> Mike Albon <malbon@openwrt.org>");
+MODULE_DESCRIPTION("Broadcom BCM63xx MTD partition parser/mapping for CFE and RedBoot");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
diff --git a/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm_tag.h b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm_tag.h
new file mode 100644
index 0000000000..efc4f02ba2
--- /dev/null
+++ b/target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm_tag.h
@@ -0,0 +1,30 @@
+#ifndef __BCM63XX_TAG_H
+#define __BCM63XX_TAG_H
+
+#define IMAGE_LEN 10                   /* Length of Length Field */
+#define ADDRESS_LEN 12                 /* Length of Address field */
+
+struct bcm_tag {
+	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 big_endian[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
+};
+
+#endif /* __BCM63XX_TAG_H */