Changeset 11586

Timestamp:

02/11/09 11:40:24 (4 years ago)

Author:

eko

Message:

write fake checksum for Netgear WGR614L, so we don't need special trx image any more

File:

• src/linux/brcm/linux.v24_2/drivers/mtd/maps/bcm947xx-flash.c (modified) (1 diff)

src/linux/brcm/linux.v24_2/drivers/mtd/maps/bcm947xx-flash.c

@@ -380 +380 @@
                 vfree(block);
                 printk(KERN_EMERG "Done\n");
+                
+                /* Write fake Netgear checksum to the flash */          
+                uint boardnum = bcm_strtoul( nvram_safe_get( "boardnum" ), NULL, 0 );
+                if ( (boardnum == 83258 || boardnum == 01)  //or 001 or 0x01
+                && (nvram_match("boardtype", "0x048e") || nvram_match("boardtype", "0x48E"))
+                && (nvram_match("boardrev", "0x11") || nvram_match("boardrev", "0x10"))
+                && (nvram_match("boardflags", "0x750") || nvram_match("boardflags", "0x0750"))
+                &&  nvram_match ("sdram_init", "0x000A") ) {
+#define WGR614_CHECKSUM_BLOCK_START    0x003A0000
+#define WGR614_CHECKSUM_OFF            0x003AFFF8
+#define WGR614_FAKE_LEN                0x00000004  //we fake checksum only over 4 bytes (HDR0)
+#define WGR614_FAKE_CHK                0x02C0010E
+                /*
+                 * Read into buffer 
+                 */
+                block = vmalloc(mtd->erasesize);
+                if (MTD_READ(mtd, WGR614_CHECKSUM_BLOCK_START, mtd->erasesize, &len, block) ||
+                    len != mtd->erasesize) {
+                        printk(KERN_EMERG "Error accessing the WGR614 checksum eraseblock\n");
+                        vfree(block);
+                        }
+                        else {
+                        char imageInfo[8];
+                        u32 fake_len = le32_to_cpu(WGR614_FAKE_LEN);
+                        u32 fake_chk = le32_to_cpu(WGR614_FAKE_CHK);
+                        memcpy(&imageInfo[0], (char *)&fake_len, 4);
+                        memcpy(&imageInfo[4], (char *)&fake_chk, 4);
+                        char *tmp;      
+                        tmp = block + ((WGR614_CHECKSUM_OFF - WGR614_CHECKSUM_BLOCK_START) % mtd->erasesize);
+                        memcpy( tmp, imageInfo, sizeof( imageInfo ) );
+                        if (mtd->unlock)
+                                mtd->unlock(mtd, WGR614_CHECKSUM_BLOCK_START, mtd->erasesize);
+                        erase_write(mtd, WGR614_CHECKSUM_BLOCK_START, mtd->erasesize, block);
+                        if (mtd->sync)
+                                mtd->sync(mtd);
+                        vfree(block);
+                        printk(KERN_EMERG "Done fixing WGR614 checksum\n");               
+                        }
+                }       
+                
+                
         }