cfi_cmdset_0020.c revision 95b93a0cd46682c6d9e8eea803fda510cb6b863a
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Common Flash Interface support: 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ST Advanced Architecture Command Set (ID 0x0020) 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) 2000 Red Hat. GPL'd 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner * $Id: cfi_cmdset_0020.c,v 1.22 2005/11/07 11:14:22 gleixner Exp $ 8c2965f1129ee54afcc4ef293ff0f25fa3a7e7392Thomas Gleixner * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10/10/2000 Nicolas Pitre <nico@cam.org> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - completely revamped method functions so they are aware and 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * independent of the flash geometry (buswidth, interleave, etc.) 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - scalability vs code size is completely set at compile-time 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (see include/linux/mtd/cfi.h for selection) 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - optimized write buffer method 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06/21/2002 Joern Engel <joern@wh.fh-wedel.de> and others 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - modified Intel Command Set 0x0001 to support ST Advanced Architecture 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (command set 0x0020) 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - added a writev function 196a8b4d319c52f8a3fdca46b185d001fbf0939911Joern Engel * 07/13/2005 Joern Engel <joern@wh.fh-wedel.de> 206a8b4d319c52f8a3fdca46b185d001fbf0939911Joern Engel * - Plugged memory leak in cfi_staa_writev(). 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/map.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/cfi.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/mtd.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/compatmac.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *); 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long count, loff_t to, size_t *retlen); 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_erase_varsize(struct mtd_info *, struct erase_info *); 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_sync (struct mtd_info *); 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, size_t len); 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, size_t len); 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_suspend (struct mtd_info *); 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_resume (struct mtd_info *); 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_destroy(struct mtd_info *); 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mtd_info *cfi_cmdset_0020(struct map_info *, int); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_info *cfi_staa_setup (struct map_info *); 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_chip_driver cfi_staa_chipdrv = { 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = NULL, /* Not usable directly */ 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = cfi_staa_destroy, 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "cfi_cmdset_0020", 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .module = THIS_MODULE 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* #define DEBUG_LOCK_BITS */ 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds//#define DEBUG_CFI_FEATURES 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_tell_features(struct cfi_pri_intelext *extp) 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=9; i<32; i++) { 831f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (extp->FeatureSupport & (1<<i)) 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Unknown Bit %X: supported\n", i); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 861f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=1; i<8; i++) { 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extp->SuspendCmdSupport & (1<<i)) 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Unknown Bit %X: supported\n", i); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 931f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Valid Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=2; i<16; i++) { 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extp->BlkStatusRegMask & (1<<i)) 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Unknown Bit %X Active: yes\n",i); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1011f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1021f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp->VccOptimal >> 8, extp->VccOptimal & 0xf); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extp->VppOptimal) 1051f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp->VppOptimal >> 8, extp->VppOptimal & 0xf); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This routine is made available to other mtd code via 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inter_module_register. It must only be accessed through 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inter_module_get which will bump the use count of this module. The 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * addresses passed back in cfi are valid as long as the use count of 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this module is non-zero, i.e. between inter_module_get and 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mtd_info *cfi_cmdset_0020(struct map_info *map, int primary) 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cfi->cfi_mode) { 1231f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It's a real CFI chip, not one for which the probe 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * routine faked a CFI structure. So we read the feature 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * table from it. 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_pri_intelext *extp; 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp = (struct cfi_pri_intelext*)cfi_read_pri(map, adr, sizeof(*extp), "ST Microelectronics"); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!extp) 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 135d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor if (extp->MajorVersion != '1' || 136d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor (extp->MinorVersion < '0' || extp->MinorVersion > '3')) { 137d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor printk(KERN_ERR " Unknown ST Microelectronics" 138d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor " Extended Query version %c.%c.\n", 139d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor extp->MajorVersion, extp->MinorVersion); 140d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor kfree(extp); 141d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor return NULL; 142d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor } 143d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Do some byteswapping if necessary */ 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp->FeatureSupport = cfi32_to_cpu(extp->FeatureSupport); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp->BlkStatusRegMask = cfi32_to_cpu(extp->BlkStatusRegMask); 1471f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Tell the user about it in lots of lovely detail */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_tell_features(extp); 1511f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner#endif 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Install our own private info structure */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->cmdset_priv = extp; 1551f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner } 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i< cfi->numchips; i++) { 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->chips[i].word_write_time = 128; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->chips[i].buffer_write_time = 128; 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->chips[i].erase_time = 1024; 1611f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner } 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cfi_staa_setup(map); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16583ea4ef213628683e5a63f2987a91044ab868051David WoodhouseEXPORT_SYMBOL_GPL(cfi_cmdset_0020); 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_info *cfi_staa_setup(struct map_info *map) 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mtd_info *mtd; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long offset = 0; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i,j; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17595b93a0cd46682c6d9e8eea803fda510cb6b863aBurman Yan mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mtd) { 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Failed to allocate memory for MTD device\n"); 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi->cmdset_priv); 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->priv = map; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->type = MTD_NORFLASH; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->size = devsize * cfi->numchips; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; 1891f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mtd->numeraseregions, GFP_KERNEL); 1911f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (!mtd->eraseregions) { 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi->cmdset_priv); 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(mtd); 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1971f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ernum, ersize; 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mtd->erasesize < ersize) { 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->erasesize = ersize; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (j=0; j<cfi->numchips; j++) { 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offset += (ersize * ernum); 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (offset != devsize) { 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Argh */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(mtd->eraseregions); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi->cmdset_priv); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(mtd); 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i<mtd->numeraseregions;i++){ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_DEBUG "%d: offset=0x%x,size=0x%x,blocks=%d\n", 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i,mtd->eraseregions[i].offset, 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->eraseregions[i].erasesize, 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->eraseregions[i].numblocks); 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2301f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* Also select the correct geometry setup too */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->erase = cfi_staa_erase_varsize; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->read = cfi_staa_read; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->write = cfi_staa_write_buffers; 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->writev = cfi_staa_writev; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->sync = cfi_staa_sync; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->lock = cfi_staa_lock; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->unlock = cfi_staa_unlock; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->suspend = cfi_staa_suspend; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->resume = cfi_staa_resume; 2405fa433942ba4e399f7e28764c9db4ade89e91d40Joern Engel mtd->flags = MTD_CAP_NORFLASH & ~MTD_BIT_WRITEABLE; 241c8b229de2b05c2b3e8d282ce260935a88ac030caJoern Engel mtd->writesize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map->fldrv = &cfi_staa_chipdrv; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __module_get(THIS_MODULE); 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->name = map->name; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mtd; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int suspended = 0; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cmd_addr; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2601f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* Ensure cmd read/writes are aligned. */ 2611f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner cmd_addr = adr & ~(map_bankwidth(map)-1); 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retry: 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If it's in FL_ERASING state, suspend it and make it talk now. 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_ERASING: 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(((struct cfi_pri_intelext *)cfi->cmdset_priv)->FeatureSupport & 2)) 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto sleep; /* We don't support erase suspend */ 2771f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write (map, CMD(0xb0), cmd_addr); 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the flash has finished erasing, then 'erase suspend' 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * appears to make some (28F320) flash devices switch to 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 'read' mode. Make sure that we switch to 'read status' 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mode so we get the right data. --rmk 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_addr); 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->oldstate = FL_ERASING; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_ERASE_SUSPENDING; 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // printk("Erase suspending at 0x%lx\n", cmd_addr); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_addr); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2921f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh */ 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xd0), cmd_addr); 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make sure we're in 'read status' mode */ 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_addr); 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_ERASING; 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Chip not ready after erase " 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "suspended: status = 0x%lx\n", status.x[0]); 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3041f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3091f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds suspended = 1; 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xff), cmd_addr); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_READY; 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3141f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_WRITING: 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Not quite yet */ 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_addr); 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_addr); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) { 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xff), cmd_addr); 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_READY; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3351f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in read. WSM status = %lx\n", status.x[0]); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sleep: 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_copy_from(map, buf, adr, len); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (suspended) { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = chip->oldstate; 3651f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* What if one interleaved chip has finished and the 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds other hasn't? The old code would leave the finished 3671f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner one in READY mode. That's bad, and caused -EROFS 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds errors to be returned from do_erase_oneblock because 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds that's the only bit it checked for at the time. 3701f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner As the state machine appears to explicitly allow 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sending the 0x70 (Read Status) command to an erasing 3721f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner chip and expecting it to be ignored, that's what we 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do. */ 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xd0), cmd_addr); 3751f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner map_write(map, CMD(0x70), cmd_addr); 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ofs; 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum; 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = (from >> cfi->chipshift); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = from - (chipnum << cfi->chipshift); 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen = 0; 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (len) { 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long thislen; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum >= cfi->numchips) 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len + ofs -1) >> cfi->chipshift) 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds thislen = (1<<cfi->chipshift) - ofs; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds thislen = len; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen += thislen; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= thislen; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += thislen; 4151f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = 0; 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum++; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4221f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixnerstatic inline int do_write_buffer(struct map_info *map, struct flchip *chip, 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr, const u_char *buf, int len) 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cmd_adr, timeo; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int wbufsize, z; 4301f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* M58LW064A requires bus alignment for buffer wriets -- saw */ 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr & (map_bankwidth(map)-1)) 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd_adr = adr & ~(wbufsize-1); 4381f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 4411f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retry: 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s: chip->state[%d]\n", __FUNCTION__, chip->state); 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 4491f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Later, we can actually think about interrupting it 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if it's in FL_ERASING state. 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Not just yet, though. 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4581f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_adr); 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s: 1 status[%x]\n", __FUNCTION__, map_read(map, cmd_adr)); 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_adr); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in buffer write Xstatus = %lx, status = %lx\n", 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status.x[0], map_read(map, cmd_adr).x[0]); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xe8), cmd_adr); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_WRITING_TO_BUFFER; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z = 0; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_adr); 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (++z > 100) { 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Argh. Not ready for write to buffer */ 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_adr); 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Chip not ready for buffer write. Xstatus = %lx\n", status.x[0]); 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write length of data to come */ 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(len/map_bankwidth(map)-1), cmd_adr ); 5231f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write data */ 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (z = 0; z < len; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z += map_bankwidth(map), buf += map_bankwidth(map)) { 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word d; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = map_word_load(map, buf); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, d, adr+z); 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* GO GO GO */ 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xd0), cmd_adr); 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_WRITING; 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(chip->buffer_write_time); 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ/2); 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z = 0; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state != FL_WRITING) { 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Someone's suspended the write. Sleep */ 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_adr); 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear status */ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), cmd_adr); 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* put back into read status register mode */ 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n"); 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5701f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z++; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!z) { 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->buffer_write_time--; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!chip->buffer_write_time) 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->buffer_write_time++; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5821f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (z > 1) 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->buffer_write_time++; 5841f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Done and happy. */ 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for errors: 'lock bit', 'VPP', 'dead cell'/'unerased cell' or 'incorrect cmd' -- saw */ 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_bitsset(map, status, CMD(0x3a))) { 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s: 2 status[%lx]\n", __FUNCTION__, status.x[0]); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear status */ 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), cmd_adr); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* put back into read status register mode */ 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return map_word_bitsset(map, status, CMD(0x02)) ? -EROFS : -EIO; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6081f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixnerstatic int cfi_staa_write_buffers (struct mtd_info *mtd, loff_t to, 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t len, size_t *retlen, const u_char *buf) 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ofs; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen = 0; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!len) 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = to >> cfi->chipshift; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s: map_bankwidth(map)[%x]\n", __FUNCTION__, map_bankwidth(map)); 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s: chipnum[%x] wbufsize[%x]\n", __FUNCTION__, chipnum, wbufsize); 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s: ofs[%x] len[%x]\n", __FUNCTION__, ofs, len); 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 6301f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write buffer is worth it only if more than one word to write... */ 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (len > 0) { 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We must not cross write block boundaries */ 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int size = wbufsize - (ofs & (wbufsize-1)); 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (size > len) 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = len; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6391f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner ret = do_write_buffer(map, &cfi->chips[chipnum], 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs, buf, size); 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs += size; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += size; 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (*retlen) += size; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= size; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ofs >> cfi->chipshift) { 6501f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner chipnum ++; 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = 0; 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum == cfi->numchips) 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6561f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Writev for ECC-Flashes is a little more complicated. We need to maintain 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a small buffer for this. 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * XXX: If the buffer size is not a multiple of 2, this will break 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ECCBUF_SIZE (mtd->eccsize) 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ECCBUF_DIV(x) ((x) & ~(ECCBUF_SIZE - 1)) 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ECCBUF_MOD(x) ((x) & (ECCBUF_SIZE - 1)) 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long count, loff_t to, size_t *retlen) 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long i; 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t totlen = 0, thislen; 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t buflen = 0; 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char *buffer; 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ECCBUF_SIZE) { 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We should fall back to a general writev implementation. 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Until that is written, just break. 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buffer = kmalloc(ECCBUF_SIZE, GFP_KERNEL); 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buffer) 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i<count; i++) { 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t elem_len = vecs[i].iov_len; 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *elem_base = vecs[i].iov_base; 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!elem_len) /* FIXME: Might be unnecessary. Check that */ 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen) { /* cut off head */ 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen + elem_len < ECCBUF_SIZE) { /* just accumulate */ 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buffer+buflen, elem_base, elem_len); 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buflen += elem_len; 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buffer+buflen, elem_base, ECCBUF_SIZE-buflen); 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = mtd->write(mtd, to, ECCBUF_SIZE, &thislen, buffer); 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds totlen += thislen; 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret || thislen != ECCBUF_SIZE) 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto write_error; 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds elem_len -= thislen-buflen; 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds elem_base += thislen-buflen; 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to += ECCBUF_SIZE; 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ECCBUF_DIV(elem_len)) { /* write clean aligned data */ 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = mtd->write(mtd, to, ECCBUF_DIV(elem_len), &thislen, elem_base); 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds totlen += thislen; 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret || thislen != ECCBUF_DIV(elem_len)) 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto write_error; 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to += thislen; 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buflen = ECCBUF_MOD(elem_len); /* cut off tail */ 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen) { 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buffer, 0xff, ECCBUF_SIZE); 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buffer, elem_base + thislen, buflen); 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen) { /* flush last page, even if not full */ 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This is sometimes intended behaviour, really */ 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = mtd->write(mtd, to, buflen, &thislen, buffer); 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds totlen += thislen; 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret || thislen != ECCBUF_SIZE) 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto write_error; 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldswrite_error: 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retlen) 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen = totlen; 7316a8b4d319c52f8a3fdca46b185d001fbf0939911Joern Engel kfree(buffer); 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo; 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retries = 3; 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsretry: 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. */ 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 7661f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in erase\n"); 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear the status register first */ 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), adr); 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Now erase */ 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x20), adr); 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xD0), adr); 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_ERASING; 7991f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep(1000); 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME. Use a timer to check this, and return immediately. */ 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Once the state machine's known to be working I'll do that */ 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*20); 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state != FL_ERASING) { 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Someone's suspended the erase. Sleep */ 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8241f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for erase to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8341f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8401f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We've broken this before. It doesn't hurt to be safe */ 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for lock bit */ 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_bitsset(map, status, CMD(0x3a))) { 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char chipstatus = status.x[0]; 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!map_word_equal(map, status, CMD(chipstatus))) { 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, w; 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (w=0; w<map_words(map); w++) { 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i<cfi_interleave(cfi); i++) { 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipstatus |= status.x[w] >> (cfi->device_type * 8); 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "Status is not identical for all chips: 0x%lx. Merging to give 0x%02x\n", 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status.x[0], chipstatus); 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Reset the error bits */ 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), adr); 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 8651f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((chipstatus & 0x30) == 0x30) { 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%x\n", chipstatus); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (chipstatus & 0x02) { 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Protection bit set */ 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EROFS; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (chipstatus & 0x8) { 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Voltage */ 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%x\n", chipstatus); 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (chipstatus & 0x20) { 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retries--) { 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus); 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus); 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint cfi_staa_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ struct map_info *map = mtd->priv; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr, len; 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum, ret = 0; 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, first; 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mtd_erase_region_info *regions = mtd->eraseregions; 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (instr->addr > mtd->size) 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((instr->len + instr->addr) > mtd->size) 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that both start and end of the requested erase are 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aligned with the erasesize at the appropriate addresses. 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = 0; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9141f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* Skip all erase regions which are ended before the start of 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the requested erase. Actually, to save on the calculations, 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds we skip to the first erase region which starts after the 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start of the requested erase, and then go back one. 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9191f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (i < mtd->numeraseregions && instr->addr >= regions[i].offset) 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i--; 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9241f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* OK, now i is pointing at the erase region in which this 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds erase request starts. Check the start of the requested 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds erase range is aligned with the erase size which is in 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds effect here. 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (instr->addr & (regions[i].erasesize-1)) 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Remember the erase region we start on */ 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first = i; 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Next, check that the end of the requested erase is aligned 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with the erase region at that address. 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (i<mtd->numeraseregions && (instr->addr + instr->len) >= regions[i].offset) 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* As before, drop back one to point at the region in which 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the address actually falls 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i--; 9471f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((instr->addr + instr->len) & (regions[i].erasesize-1)) 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = instr->addr >> cfi->chipshift; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = instr->addr - (chipnum << cfi->chipshift); 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = instr->len; 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i=first; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(len) { 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr); 9591f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += regions[i].erasesize; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= regions[i].erasesize; 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr % (1<< cfi->chipshift) == ((regions[i].offset + (regions[i].erasesize * regions[i].numblocks)) %( 1<< cfi->chipshift))) 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr >> cfi->chipshift) { 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = 0; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum++; 9721f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum >= cfi->numchips) 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9771f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds instr->state = MTD_ERASE_DONE; 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd_erase_callback(instr); 9801f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_sync (struct mtd_info *mtd) 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct flchip *chip; 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retry: 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch(chip->state) { 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->oldstate = chip->state; 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_SYNCING; 10061f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* No need to wake_up() on this state change - 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as the whole point is that nobody can do anything 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with the chip now anyway. 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_SYNCING: 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Not an idle state */ 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 10171f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 10211f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unlock the chips again */ 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i--; i >=0; i--) { 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 10321f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state == FL_SYNCING) { 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = chip->oldstate; 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_lock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo = jiffies + HZ; 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsretry: 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. */ 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 10671f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (map_word_andequal(map, status, status_OK, status_OK)) 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10691f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in lock\n"); 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x60), adr); 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x01), adr); 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_LOCKING; 10981f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep(1000); 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME. Use a timer to check this, and return immediately. */ 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Once the state machine's known to be working I'll do that */ 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*2); 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11121f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for lock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11221f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11281f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Done and happy. */ 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, size_t len) 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr; 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum, ret = 0; 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ofs_factor = cfi->interleave * cfi->device_type; 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ofs & (mtd->erasesize - 1)) 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len & (mtd->erasesize -1)) 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len + ofs) > mtd->size) 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = ofs >> cfi->chipshift; 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = ofs - (chipnum << cfi->chipshift); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(len) { 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("before lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_lock_oneblock(map, &cfi->chips[chipnum], adr); 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("after lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 11721f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner#endif 11731f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += mtd->erasesize; 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= mtd->erasesize; 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr >> cfi->chipshift) { 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = 0; 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum++; 11831f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum >= cfi->numchips) 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_unlock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo = jiffies + HZ; 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsretry: 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. */ 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12181f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in unlock\n"); 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x60), adr); 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xD0), adr); 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_UNLOCKING; 12471f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep(1000); 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME. Use a timer to check this, and return immediately. */ 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Once the state machine's known to be working I'll do that */ 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*2); 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12611f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for unlock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]); 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12711f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the unlock, wait a while and retry */ 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12771f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Done and happy. */ 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr; 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum, ret = 0; 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ofs_factor = cfi->interleave * cfi->device_type; 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = ofs >> cfi->chipshift; 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = ofs - (chipnum << cfi->chipshift); 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long temp_adr = adr; 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long temp_len = len; 13021f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (temp_len) { 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("before unlock %x: block status register is %x\n",temp_adr,cfi_read_query(map, temp_adr+(2*ofs_factor))); 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds temp_adr += mtd->erasesize; 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds temp_len -= mtd->erasesize; 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_unlock_oneblock(map, &cfi->chips[chipnum], adr); 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("after unlock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 13201f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_suspend(struct mtd_info *mtd) 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct flchip *chip; 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch(chip->state) { 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->oldstate = chip->state; 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_PM_SUSPENDED; 13441f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* No need to wake_up() on this state change - 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as the whole point is that nobody can do anything 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with the chip now anyway. 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_PM_SUSPENDED: 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EAGAIN; 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unlock the chips again */ 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i--; i >=0; i--) { 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 13631f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 13651f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No need to force it into a known state here, 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds because we're returning failure, and it didn't 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get power cycled */ 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = chip->oldstate; 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13751f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner } 13761f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_resume(struct mtd_info *mtd) 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct flchip *chip; 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i<cfi->numchips; i++) { 13881f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_bh(chip->mutex); 13921f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Go to known state. Chip may have been power cycled */ 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xFF), 0); 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_READY; 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_bh(chip->mutex); 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_destroy(struct mtd_info *mtd) 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi->cmdset_priv); 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi); 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1413