cfi_cmdset_0020.c revision eda95cbf75193808f62948fb0142ba0901d8bee2
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 * 72f82af08fcc7dc01a7e98a49a5995a77e32a2925Nicolas Pitre * 10/10/2000 Nicolas Pitre <nico@fluxnic.net> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - completely revamped method functions so they are aware and 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * independent of the flash geometry (buswidth, interleave, etc.) 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - scalability vs code size is completely set at compile-time 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (see include/linux/mtd/cfi.h for selection) 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - optimized write buffer method 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06/21/2002 Joern Engel <joern@wh.fh-wedel.de> and others 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - modified Intel Command Set 0x0001 to support ST Advanced Architecture 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (command set 0x0020) 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - added a writev function 176a8b4d319c52f8a3fdca46b185d001fbf0939911Joern Engel * 07/13/2005 Joern Engel <joern@wh.fh-wedel.de> 186a8b4d319c52f8a3fdca46b185d001fbf0939911Joern Engel * - Plugged memory leak in cfi_staa_writev(). 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/map.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/cfi.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mtd/mtd.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *); 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long count, loff_t to, size_t *retlen); 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_erase_varsize(struct mtd_info *, struct erase_info *); 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_sync (struct mtd_info *); 4469423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunterstatic int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); 4569423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunterstatic int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_suspend (struct mtd_info *); 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_resume (struct mtd_info *); 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_destroy(struct mtd_info *); 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mtd_info *cfi_cmdset_0020(struct map_info *, int); 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_info *cfi_staa_setup (struct map_info *); 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct mtd_chip_driver cfi_staa_chipdrv = { 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = NULL, /* Not usable directly */ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = cfi_staa_destroy, 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "cfi_cmdset_0020", 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .module = THIS_MODULE 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* #define DEBUG_LOCK_BITS */ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds//#define DEBUG_CFI_FEATURES 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_tell_features(struct cfi_pri_intelext *extp) 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=9; i<32; i++) { 801f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (extp->FeatureSupport & (1<<i)) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Unknown Bit %X: supported\n", i); 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 831f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=1; i<8; i++) { 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extp->SuspendCmdSupport & (1<<i)) 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Unknown Bit %X: supported\n", i); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 901f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Valid Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=2; i<16; i++) { 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extp->BlkStatusRegMask & (1<<i)) 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" - Unknown Bit %X Active: yes\n",i); 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 981f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 991f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp->VccOptimal >> 8, extp->VccOptimal & 0xf); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extp->VppOptimal) 1021f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp->VppOptimal >> 8, extp->VppOptimal & 0xf); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This routine is made available to other mtd code via 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inter_module_register. It must only be accessed through 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inter_module_get which will bump the use count of this module. The 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * addresses passed back in cfi are valid as long as the use count of 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this module is non-zero, i.e. between inter_module_get and 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct mtd_info *cfi_cmdset_0020(struct map_info *map, int primary) 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cfi->cfi_mode) { 1201f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It's a real CFI chip, not one for which the probe 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * routine faked a CFI structure. So we read the feature 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * table from it. 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_pri_intelext *extp; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extp = (struct cfi_pri_intelext*)cfi_read_pri(map, adr, sizeof(*extp), "ST Microelectronics"); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!extp) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 132d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor if (extp->MajorVersion != '1' || 133d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor (extp->MinorVersion < '0' || extp->MinorVersion > '3')) { 134d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor printk(KERN_ERR " Unknown ST Microelectronics" 135d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor " Extended Query version %c.%c.\n", 136d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor extp->MajorVersion, extp->MinorVersion); 137d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor kfree(extp); 138d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor return NULL; 139d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor } 140d88f977b85d251f548add3d0a76fc186f99b1b21Todd Poynor 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Do some byteswapping if necessary */ 1428e987465a137d4824710e02550f06aa891c9b865Aaron Sierra extp->FeatureSupport = cfi32_to_cpu(map, extp->FeatureSupport); 1438e987465a137d4824710e02550f06aa891c9b865Aaron Sierra extp->BlkStatusRegMask = cfi32_to_cpu(map, 1448e987465a137d4824710e02550f06aa891c9b865Aaron Sierra extp->BlkStatusRegMask); 1451f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Tell the user about it in lots of lovely detail */ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_tell_features(extp); 1491f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner#endif 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Install our own private info structure */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->cmdset_priv = extp; 1531f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner } 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i< cfi->numchips; i++) { 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->chips[i].word_write_time = 128; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->chips[i].buffer_write_time = 128; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi->chips[i].erase_time = 1024; 15983d480917b1af3f8fcffa7a9c8775e0f2dd03395Vijay Sampath cfi->chips[i].ref_point_counter = 0; 16083d480917b1af3f8fcffa7a9c8775e0f2dd03395Vijay Sampath init_waitqueue_head(&(cfi->chips[i].wq)); 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++){ 22469423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunter printk(KERN_DEBUG "%d: offset=0x%llx,size=0x%x,blocks=%d\n", 22569423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunter i, (unsigned long long)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 */ 24213ce77f46c79a3839e4c2ff9722c9416c165f498Anatolij Gustschin mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map->fldrv = &cfi_staa_chipdrv; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __module_get(THIS_MODULE); 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd->name = map->name; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mtd; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int suspended = 0; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cmd_addr; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2611f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* Ensure cmd read/writes are aligned. */ 2621f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner cmd_addr = adr & ~(map_bankwidth(map)-1); 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retry: 269c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If it's in FL_ERASING state, suspend it and make it talk now. 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_ERASING: 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(((struct cfi_pri_intelext *)cfi->cmdset_priv)->FeatureSupport & 2)) 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto sleep; /* We don't support erase suspend */ 2781f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write (map, CMD(0xb0), cmd_addr); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the flash has finished erasing, then 'erase suspend' 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * appears to make some (28F320) flash devices switch to 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 'read' mode. Make sure that we switch to 'read status' 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mode so we get the right data. --rmk 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_addr); 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->oldstate = FL_ERASING; 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_ERASE_SUSPENDING; 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // printk("Erase suspending at 0x%lx\n", cmd_addr); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_addr); 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2931f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh */ 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xd0), cmd_addr); 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make sure we're in 'read status' mode */ 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_addr); 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_ERASING; 300100f2341e305f98de3aa12fb472771ab029cbda7Tadashi Abe wake_up(&chip->wq); 301c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Chip not ready after erase " 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "suspended: status = 0x%lx\n", status.x[0]); 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3061f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 307c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 309c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3111f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds suspended = 1; 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xff), cmd_addr); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_READY; 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3161f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_WRITING: 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Not quite yet */ 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_addr); 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_addr); 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) { 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xff), cmd_addr); 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_READY; 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3371f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 340c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in read. WSM status = %lx\n", status.x[0]); 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 346c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sleep: 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 356c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_copy_from(map, buf, adr, len); 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (suspended) { 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = chip->oldstate; 3671f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* What if one interleaved chip has finished and the 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds other hasn't? The old code would leave the finished 3691f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner one in READY mode. That's bad, and caused -EROFS 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds errors to be returned from do_erase_oneblock because 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds that's the only bit it checked for at the time. 3721f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner As the state machine appears to explicitly allow 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sending the 0x70 (Read Status) command to an erasing 3741f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner chip and expecting it to be ignored, that's what we 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do. */ 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xd0), cmd_addr); 3771f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner map_write(map, CMD(0x70), cmd_addr); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 381c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ofs; 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum; 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ofs: offset within the first chip that the first read should start */ 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = (from >> cfi->chipshift); 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = from - (chipnum << cfi->chipshift); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen = 0; 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (len) { 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long thislen; 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum >= cfi->numchips) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len + ofs -1) >> cfi->chipshift) 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds thislen = (1<<cfi->chipshift) - ofs; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds thislen = len; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen += thislen; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= thislen; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += thislen; 4171f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = 0; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum++; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4241f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixnerstatic inline int do_write_buffer(struct map_info *map, struct flchip *chip, 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr, const u_char *buf, int len) 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cmd_adr, timeo; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int wbufsize, z; 4321f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* M58LW064A requires bus alignment for buffer wriets -- saw */ 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr & (map_bankwidth(map)-1)) 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd_adr = adr & ~(wbufsize-1); 4401f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 4431f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retry: 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 448cb53b3b99992b6c548d56cdf47bc710640ee2ee1Harvey Harrison printk("%s: chip->state[%d]\n", __func__, chip->state); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 450c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 4511f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Later, we can actually think about interrupting it 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if it's in FL_ERASING state. 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Not just yet, though. 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4601f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_adr); 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 466cb53b3b99992b6c548d56cdf47bc710640ee2ee1Harvey Harrison printk("%s: 1 status[%x]\n", __func__, map_read(map, cmd_adr)); 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_adr); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 475c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in buffer write Xstatus = %lx, status = %lx\n", 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status.x[0], map_read(map, cmd_adr).x[0]); 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 482c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 491c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xe8), cmd_adr); 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_WRITING_TO_BUFFER; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z = 0; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_adr); 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 508c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 510c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (++z > 100) { 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Argh. Not ready for write to buffer */ 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), cmd_adr); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 517c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "Chip not ready for buffer write. Xstatus = %lx\n", status.x[0]); 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write length of data to come */ 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(len/map_bankwidth(map)-1), cmd_adr ); 5251f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write data */ 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (z = 0; z < len; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z += map_bankwidth(map), buf += map_bankwidth(map)) { 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word d; 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = map_word_load(map, buf); 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, d, adr+z); 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* GO GO GO */ 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xd0), cmd_adr); 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_WRITING; 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 537c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(chip->buffer_write_time); 539c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ/2); 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z = 0; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state != FL_WRITING) { 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Someone's suspended the write. Sleep */ 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 548c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ / 2); /* FIXME */ 552c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, cmd_adr); 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear status */ 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), cmd_adr); 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* put back into read status register mode */ 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 568c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n"); 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5721f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 574c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds z++; 577c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!z) { 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->buffer_write_time--; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!chip->buffer_write_time) 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->buffer_write_time++; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5841f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (z > 1) 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->buffer_write_time++; 5861f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Done and happy. */ 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for errors: 'lock bit', 'VPP', 'dead cell'/'unerased cell' or 'incorrect cmd' -- saw */ 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_bitsset(map, status, CMD(0x3a))) { 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 594cb53b3b99992b6c548d56cdf47bc710640ee2ee1Harvey Harrison printk("%s: 2 status[%lx]\n", __func__, status.x[0]); 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear status */ 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), cmd_adr); 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* put back into read status register mode */ 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 601c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return map_word_bitsset(map, status, CMD(0x02)) ? -EROFS : -EIO; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 605c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6101f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixnerstatic int cfi_staa_write_buffers (struct mtd_info *mtd, loff_t to, 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t len, size_t *retlen, const u_char *buf) 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long ofs; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen = 0; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!len) 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = to >> cfi->chipshift; 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = to - (chipnum << cfi->chipshift); 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_CFI_FEATURES 628cb53b3b99992b6c548d56cdf47bc710640ee2ee1Harvey Harrison printk("%s: map_bankwidth(map)[%x]\n", __func__, map_bankwidth(map)); 629cb53b3b99992b6c548d56cdf47bc710640ee2ee1Harvey Harrison printk("%s: chipnum[%x] wbufsize[%x]\n", __func__, chipnum, wbufsize); 630cb53b3b99992b6c548d56cdf47bc710640ee2ee1Harvey Harrison printk("%s: ofs[%x] len[%x]\n", __func__, ofs, len); 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 6321f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write buffer is worth it only if more than one word to write... */ 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (len > 0) { 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We must not cross write block boundaries */ 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int size = wbufsize - (ofs & (wbufsize-1)); 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (size > len) 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = len; 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6411f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner ret = do_write_buffer(map, &cfi->chips[chipnum], 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs, buf, size); 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs += size; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += size; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (*retlen) += size; 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= size; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ofs >> cfi->chipshift) { 6521f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner chipnum ++; 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ofs = 0; 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum == cfi->numchips) 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6581f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Writev for ECC-Flashes is a little more complicated. We need to maintain 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a small buffer for this. 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * XXX: If the buffer size is not a multiple of 2, this will break 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 667992c9d24c417afce9792da18f8e664c6b9802c5cArtem Bityutskiy#define ECCBUF_SIZE (mtd->writesize) 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ECCBUF_DIV(x) ((x) & ~(ECCBUF_SIZE - 1)) 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ECCBUF_MOD(x) ((x) & (ECCBUF_SIZE - 1)) 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs, 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long count, loff_t to, size_t *retlen) 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long i; 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t totlen = 0, thislen; 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t buflen = 0; 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char *buffer; 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ECCBUF_SIZE) { 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We should fall back to a general writev implementation. 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Until that is written, just break. 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buffer = kmalloc(ECCBUF_SIZE, GFP_KERNEL); 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buffer) 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i<count; i++) { 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t elem_len = vecs[i].iov_len; 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *elem_base = vecs[i].iov_base; 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!elem_len) /* FIXME: Might be unnecessary. Check that */ 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen) { /* cut off head */ 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen + elem_len < ECCBUF_SIZE) { /* just accumulate */ 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buffer+buflen, elem_base, elem_len); 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buflen += elem_len; 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buffer+buflen, elem_base, ECCBUF_SIZE-buflen); 702eda95cbf75193808f62948fb0142ba0901d8bee2Artem Bityutskiy ret = mtd_write(mtd, to, ECCBUF_SIZE, &thislen, 703eda95cbf75193808f62948fb0142ba0901d8bee2Artem Bityutskiy buffer); 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds totlen += thislen; 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret || thislen != ECCBUF_SIZE) 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto write_error; 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds elem_len -= thislen-buflen; 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds elem_base += thislen-buflen; 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to += ECCBUF_SIZE; 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ECCBUF_DIV(elem_len)) { /* write clean aligned data */ 712eda95cbf75193808f62948fb0142ba0901d8bee2Artem Bityutskiy ret = mtd_write(mtd, to, ECCBUF_DIV(elem_len), 713eda95cbf75193808f62948fb0142ba0901d8bee2Artem Bityutskiy &thislen, elem_base); 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds totlen += thislen; 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret || thislen != ECCBUF_DIV(elem_len)) 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto write_error; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to += thislen; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buflen = ECCBUF_MOD(elem_len); /* cut off tail */ 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen) { 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buffer, 0xff, ECCBUF_SIZE); 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buffer, elem_base + thislen, buflen); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buflen) { /* flush last page, even if not full */ 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This is sometimes intended behaviour, really */ 727eda95cbf75193808f62948fb0142ba0901d8bee2Artem Bityutskiy ret = mtd_write(mtd, to, buflen, &thislen, buffer); 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds totlen += thislen; 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret || thislen != ECCBUF_SIZE) 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto write_error; 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldswrite_error: 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retlen) 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *retlen = totlen; 7356a8b4d319c52f8a3fdca46b185d001fbf0939911Joern Engel kfree(buffer); 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo; 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retries = 3; 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsretry: 756c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. */ 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 7701f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 773c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in erase\n"); 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 779c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 788c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear the status register first */ 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), adr); 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Now erase */ 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x20), adr); 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xD0), adr); 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_ERASING; 8031f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 804c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep(1000); 806c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME. Use a timer to check this, and return immediately. */ 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Once the state machine's known to be working I'll do that */ 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*20); 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state != FL_ERASING) { 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Someone's suspended the erase. Sleep */ 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 817c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*20); /* FIXME */ 821c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8281f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus 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]); 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 835c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8381f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 840c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 842c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8441f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We've broken this before. It doesn't hurt to be safe */ 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for lock bit */ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_bitsset(map, status, CMD(0x3a))) { 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char chipstatus = status.x[0]; 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!map_word_equal(map, status, CMD(chipstatus))) { 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, w; 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (w=0; w<map_words(map); w++) { 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i<cfi_interleave(cfi); i++) { 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipstatus |= status.x[w] >> (cfi->device_type * 8); 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "Status is not identical for all chips: 0x%lx. Merging to give 0x%02x\n", 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status.x[0], chipstatus); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Reset the error bits */ 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x50), adr); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 8691f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((chipstatus & 0x30) == 0x30) { 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%x\n", chipstatus); 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (chipstatus & 0x02) { 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Protection bit set */ 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EROFS; 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (chipstatus & 0x8) { 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Voltage */ 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%x\n", chipstatus); 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (chipstatus & 0x20) { 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retries--) { 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus); 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 885c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus); 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 894c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 898eb8e31831a603f285ee9e6ffc59d5366e0ff8a8eAdrian Bunkstatic int cfi_staa_erase_varsize(struct mtd_info *mtd, 899eb8e31831a603f285ee9e6ffc59d5366e0ff8a8eAdrian Bunk struct erase_info *instr) 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ struct map_info *map = mtd->priv; 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr, len; 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum, ret = 0; 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, first; 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mtd_erase_region_info *regions = mtd->eraseregions; 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (instr->addr > mtd->size) 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((instr->len + instr->addr) > mtd->size) 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that both start and end of the requested erase are 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * aligned with the erasesize at the appropriate addresses. 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = 0; 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9191f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* Skip all erase regions which are ended before the start of 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the requested erase. Actually, to save on the calculations, 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds we skip to the first erase region which starts after the 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start of the requested erase, and then go back one. 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9241f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (i < mtd->numeraseregions && instr->addr >= regions[i].offset) 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i--; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9291f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* OK, now i is pointing at the erase region in which this 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds erase request starts. Check the start of the requested 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds erase range is aligned with the erase size which is in 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds effect here. 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (instr->addr & (regions[i].erasesize-1)) 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Remember the erase region we start on */ 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first = i; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Next, check that the end of the requested erase is aligned 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with the erase region at that address. 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (i<mtd->numeraseregions && (instr->addr + instr->len) >= regions[i].offset) 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* As before, drop back one to point at the region in which 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the address actually falls 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i--; 9521f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((instr->addr + instr->len) & (regions[i].erasesize-1)) 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = instr->addr >> cfi->chipshift; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = instr->addr - (chipnum << cfi->chipshift); 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = instr->len; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i=first; 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(len) { 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr); 9641f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += regions[i].erasesize; 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= regions[i].erasesize; 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 97169423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunter if (adr % (1<< cfi->chipshift) == (((unsigned long)regions[i].offset + (regions[i].erasesize * regions[i].numblocks)) %( 1<< cfi->chipshift))) 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i++; 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr >> cfi->chipshift) { 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = 0; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum++; 9771f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum >= cfi->numchips) 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9821f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds instr->state = MTD_ERASE_DONE; 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mtd_erase_callback(instr); 9851f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_sync (struct mtd_info *mtd) 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct flchip *chip; 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retry: 1002c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch(chip->state) { 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->oldstate = chip->state; 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_SYNCING; 10111f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* No need to wake_up() on this state change - 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as the whole point is that nobody can do anything 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with the chip now anyway. 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_SYNCING: 1016c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Not an idle state */ 1021f8e30e447c692aaa728c65930ebc0146f65e1e7bDmitry Adamushko set_current_state(TASK_UNINTERRUPTIBLE); 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 10231f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1024c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 10271f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unlock the chips again */ 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i--; i >=0; i--) { 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1037c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 10381f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state == FL_SYNCING) { 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = chip->oldstate; 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1043c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_lock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo = jiffies + HZ; 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsretry: 1061c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. */ 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 10731f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner if (map_word_andequal(map, status, status_OK, status_OK)) 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10751f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 1078c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in lock\n"); 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 1084c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 1093c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x60), adr); 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x01), adr); 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_LOCKING; 11041f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1105c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep(1000); 1107c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME. Use a timer to check this, and return immediately. */ 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Once the state machine's known to be working I'll do that */ 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*2); 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11181f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus 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]); 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 1125c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11281f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 1130c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 1132c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11341f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Done and happy. */ 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 1139c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 114269423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunterstatic int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr; 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum, ret = 0; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ofs_factor = cfi->interleave * cfi->device_type; 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ofs & (mtd->erasesize - 1)) 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len & (mtd->erasesize -1)) 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((len + ofs) > mtd->size) 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = ofs >> cfi->chipshift; 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = ofs - (chipnum << cfi->chipshift); 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(len) { 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("before lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_lock_oneblock(map, &cfi->chips[chipnum], adr); 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("after lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 11781f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner#endif 11791f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += mtd->erasesize; 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len -= mtd->erasesize; 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (adr >> cfi->chipshift) { 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = 0; 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum++; 11891f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chipnum >= cfi->numchips) 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int do_unlock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr) 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_word status, status_OK; 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long timeo = jiffies + HZ; 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr += chip->start; 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let's determine this according to the interleave only once */ 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status_OK = CMD(0x80); 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsretry: 1210c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that the chip's ready to talk to us. */ 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (chip->state) { 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12241f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Urgh. Chip not yet ready to talk to us. */ 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 1227c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "waiting for chip to be ready timed out in unlock\n"); 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the lock, wait a while and retry */ 1233c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Stick ourselves on a wait queue to be woken when 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds someone changes the status */ 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&chip->wq, &wait); 1242c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&chip->wq, &wait); 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + HZ; 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto retry; 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ENABLE_VPP(map); 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x60), adr); 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xD0), adr); 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_UNLOCKING; 12531f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1254c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep(1000); 1256c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME. Use a timer to check this, and return immediately. */ 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Once the state machine's known to be working I'll do that */ 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeo = jiffies + (HZ*2); 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = map_read(map, adr); 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (map_word_andequal(map, status, status_OK, status_OK)) 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12671f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* OK Still waiting */ 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (time_after(jiffies, timeo)) { 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0x70), adr); 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus 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]); 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 1274c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12771f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Latency issues. Drop the unlock, wait a while and retry */ 1279c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_udelay(1); 1281c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12831f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Done and happy. */ 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_STATUS; 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DISABLE_VPP(map); 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 1288c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 129169423d99fc182a81f3c5db3eb5c140acc6fc64beAdrian Hunterstatic int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long adr; 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chipnum, ret = 0; 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ofs_factor = cfi->interleave * cfi->device_type; 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chipnum = ofs >> cfi->chipshift; 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adr = ofs - (chipnum << cfi->chipshift); 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long temp_adr = adr; 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long temp_len = len; 13081f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (temp_len) { 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("before unlock %x: block status register is %x\n",temp_adr,cfi_read_query(map, temp_adr+(2*ofs_factor))); 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds temp_adr += mtd->erasesize; 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds temp_len -= mtd->erasesize; 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = do_unlock_oneblock(map, &cfi->chips[chipnum], adr); 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LOCK_BITS 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL); 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("after unlock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor))); 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL); 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 13261f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int cfi_staa_suspend(struct mtd_info *mtd) 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct flchip *chip; 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; !ret && i<cfi->numchips; i++) { 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1341c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch(chip->state) { 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_READY: 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_STATUS: 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_CFI_QUERY: 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_JEDEC_QUERY: 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->oldstate = chip->state; 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_PM_SUSPENDED; 13501f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner /* No need to wake_up() on this state change - 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as the whole point is that nobody can do anything 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with the chip now anyway. 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FL_PM_SUSPENDED: 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EAGAIN; 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1361c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unlock the chips again */ 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i--; i >=0; i--) { 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 13691f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 1370c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 13711f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No need to force it into a known state here, 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds because we're returning failure, and it didn't 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get power cycled */ 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = chip->oldstate; 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1379c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13811f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner } 13821f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_resume(struct mtd_info *mtd) 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct flchip *chip; 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0; i<cfi->numchips; i++) { 13941f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip = &cfi->chips[i]; 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1397c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_lock(&chip->mutex); 13981f948b43f7b5cf721cf0d03f507843efc1a9bfadThomas Gleixner 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Go to known state. Chip may have been power cycled */ 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (chip->state == FL_PM_SUSPENDED) { 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds map_write(map, CMD(0xFF), 0); 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chip->state = FL_READY; 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&chip->wq); 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1406c4e773764cead9358fd4b036d1b883fff3968513Stefani Seibold mutex_unlock(&chip->mutex); 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cfi_staa_destroy(struct mtd_info *mtd) 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct map_info *map = mtd->priv; 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct cfi_private *cfi = map->fldrv_priv; 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi->cmdset_priv); 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cfi); 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1419