// SPDX-License-Identifier: GPL-2.0
/*
* Common Flash Interface support :
* Intel Extended Vendor Command Set ( ID 0 x0001 )
*
* ( C ) 2000 Red Hat .
*
*
* 10 / 10 / 2000 Nicolas Pitre < nico @ fluxnic . net >
* - completely revamped method functions so they are aware and
* independent of the flash geometry ( buswidth , interleave , etc . )
* - scalability vs code size is completely set at compile - time
* ( see include / linux / mtd / cfi . h for selection )
* - optimized write buffer method
* 02 / 05 / 2002 Christopher Hoover < ch @ hpl . hp . com > / < ch @ murgatroid . com >
* - reworked lock / unlock / erase support for var size flash
* 21 / 03 / 2007 Rodolfo Giometti < giometti @ linux . it >
* - auto unlock sectors on resume for auto locking flash on power up
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm /io.h>
#include <asm /byteorder.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/bitmap.h>
#include <linux/mtd/xip.h>
#include <linux/mtd/map.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/cfi.h>
/* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */
/* #define CMDSET0001_DISABLE_WRITE_SUSPEND */
// debugging, turns off buffer write mode if set to 1
#define FORCE_WORD_WRITE 0
/* Intel chips */
#define I82802AB 0 x00ad
#define I82802AC 0 x00ac
#define PF38F4476 0 x881c
#define M28F00AP30 0 x8963
/* STMicroelectronics chips */
#define M50LPW080 0 x002F
#define M50FLW080A 0 x0080
#define M50FLW080B 0 x0081
/* Atmel chips */
#define AT49BV640D 0 x02de
#define AT49BV640DT 0 x02db
/* Sharp chips */
#define LH28F640BFHE_PTTL90 0 x00b0
#define LH28F640BFHE_PBTL90 0 x00b1
#define LH28F640BFHE_PTTL70A 0 x00b2
#define LH28F640BFHE_PBTL70A 0 x00b3
static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
static int cfi_intelext_writev(struct mtd_info *, const struct kvec *, unsigned long , loff_t, size_t *);
static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *);
static void cfi_intelext_sync (struct mtd_info *);
static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs,
uint64_t len);
#ifdef CONFIG_MTD_OTP
static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_write_user_prot_reg(struct mtd_info *, loff_t, size_t,
size_t *, const u_char *);
static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t);
static int cfi_intelext_get_fact_prot_info(struct mtd_info *, size_t,
size_t *, struct otp_info *);
static int cfi_intelext_get_user_prot_info(struct mtd_info *, size_t,
size_t *, struct otp_info *);
#endif
static int cfi_intelext_suspend (struct mtd_info *);
static void cfi_intelext_resume (struct mtd_info *);
static int cfi_intelext_reboot (struct notifier_block *, unsigned long , void *);
static void cfi_intelext_destroy(struct mtd_info *);
struct mtd_info *cfi_cmdset_0001(struct map_info *, int );
static struct mtd_info *cfi_intelext_setup (struct mtd_info *);
static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **);
static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys);
static int cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len);
static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr);
#include "fwh_lock.h"
/*
* * * * * * * * * * * * SETUP AND PROBE BITS * * * * * * * * * * *
*/
static struct mtd_chip_driver cfi_intelext_chipdrv = {
.probe = NULL, /* Not usable directly */
.destroy = cfi_intelext_destroy,
.name = "cfi_cmdset_0001" ,
.module = THIS_MODULE
};
/* #define DEBUG_LOCK_BITS */
/* #define DEBUG_CFI_FEATURES */
#ifdef DEBUG_CFI_FEATURES
static void cfi_tell_features(struct cfi_pri_intelext *extp)
{
int i;
printk(" Extended Query version %c.%c\n" , extp->MajorVersion, extp->MinorVersion);
printk(" Feature/Command Support: %4.4X\n" , extp->FeatureSupport);
printk(" - Chip Erase: %s\n" , extp->FeatureSupport&1 ?"supported" :"unsupported" );
printk(" - Suspend Erase: %s\n" , extp->FeatureSupport&2 ?"supported" :"unsupported" );
printk(" - Suspend Program: %s\n" , extp->FeatureSupport&4 ?"supported" :"unsupported" );
printk(" - Legacy Lock/Unlock: %s\n" , extp->FeatureSupport&8 ?"supported" :"unsupported" );
printk(" - Queued Erase: %s\n" , extp->FeatureSupport&16 ?"supported" :"unsupported" );
printk(" - Instant block lock: %s\n" , extp->FeatureSupport&32 ?"supported" :"unsupported" );
printk(" - Protection Bits: %s\n" , extp->FeatureSupport&64 ?"supported" :"unsupported" );
printk(" - Page-mode read: %s\n" , extp->FeatureSupport&128 ?"supported" :"unsupported" );
printk(" - Synchronous read: %s\n" , extp->FeatureSupport&256 ?"supported" :"unsupported" );
printk(" - Simultaneous operations: %s\n" , extp->FeatureSupport&512 ?"supported" :"unsupported" );
printk(" - Extended Flash Array: %s\n" , extp->FeatureSupport&1024 ?"supported" :"unsupported" );
for (i=11 ; i<32 ; i++) {
if (extp->FeatureSupport & (1 <<i))
printk(" - Unknown Bit %X: supported\n" , i);
}
printk(" Supported functions after Suspend: %2.2X\n" , extp->SuspendCmdSupport);
printk(" - Program after Erase Suspend: %s\n" , extp->SuspendCmdSupport&1 ?"supported" :"unsupported" );
for (i=1 ; i<8 ; i++) {
if (extp->SuspendCmdSupport & (1 <<i))
printk(" - Unknown Bit %X: supported\n" , i);
}
printk(" Block Status Register Mask: %4.4X\n" , extp->BlkStatusRegMask);
printk(" - Lock Bit Active: %s\n" , extp->BlkStatusRegMask&1 ?"yes" :"no" );
printk(" - Lock-Down Bit Active: %s\n" , extp->BlkStatusRegMask&>2 ?"yes" :"no" );
for (i=2 ; i<3 ; i++) {
if (extp->BlkStatusRegMask & (1 <<i))
printk(" - Unknown Bit %X Active: yes\n" ,i);
}
printk(" - EFA Lock Bit: %s\n" , extp->BlkStatusRegMask&16 ?"yes" :"no" );
printk(" - EFA Lock-Down Bit: %s\n" , extp->BlkStatusRegMask&32 ?"yes" :"no" );
for (i=6 ; i<16 ; i++) {
if (extp->BlkStatusRegMask & (1 <<i))
printk(" - Unknown Bit %X Active: yes\n" ,i);
}
printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n" ,
extp->VccOptimal >> 4 , extp->VccOptimal & 0 xf);
if (extp->VppOptimal)
printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n" ,
extp->VppOptimal >> 4 , extp->VppOptimal & 0 xf);
}
#endif
/* Atmel chips don't use the same PRI format as Intel chips */
static void fixup_convert_atmel_pri(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
struct cfi_pri_atmel atmel_pri;
uint32_t features = 0 ;
/* Reverse byteswapping */
extp->FeatureSupport = cpu_to_le32(extp->FeatureSupport);
extp->BlkStatusRegMask = cpu_to_le16(extp->BlkStatusRegMask);
extp->ProtRegAddr = cpu_to_le16(extp->ProtRegAddr);
memcpy(&atmel_pri, extp, sizeof (atmel_pri));
memset((char *)extp + 5 , 0 , sizeof (*extp) - 5 );
printk(KERN_ERR "atmel Features: %02x\n" , atmel_pri.Features);
if (atmel_pri.Features & 0 x01) /* chip erase supported */
features |= (1 <<0 );
if (atmel_pri.Features & 0 x02) /* erase suspend supported */
features |= (1 <<1 );
if (atmel_pri.Features & 0 x04) /* program suspend supported */
features |= (1 <<2 );
if (atmel_pri.Features & 0 x08) /* simultaneous operations supported */
features |= (1 <<9 );
if (atmel_pri.Features & 0 x20) /* page mode read supported */
features |= (1 <<7 );
if (atmel_pri.Features & 0 x40) /* queued erase supported */
features |= (1 <<4 );
if (atmel_pri.Features & 0 x80) /* Protection bits supported */
features |= (1 <<6 );
extp->FeatureSupport = features;
/* burst write mode not supported */
cfi->cfiq->BufWriteTimeoutTyp = 0 ;
cfi->cfiq->BufWriteTimeoutMax = 0 ;
}
static void fixup_at49bv640dx_lock(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
cfip->FeatureSupport |= (1 << 5 );
mtd->flags |= MTD_POWERUP_LOCK;
}
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
/* Some Intel Strata Flash prior to FPO revision C has bugs in this area */
static void fixup_intel_strataflash(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
printk(KERN_WARNING "cfi_cmdset_0001: Suspend "
"erase on write disabled.\n" );
extp->SuspendCmdSupport &= ~1 ;
}
#endif
#ifdef CMDSET0001_DISABLE_WRITE_SUSPEND
static void fixup_no_write_suspend(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
if (cfip && (cfip->FeatureSupport&4 )) {
cfip->FeatureSupport &= ~4 ;
printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n" );
}
}
#endif
static void fixup_st_m28w320ct(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
cfi->cfiq->BufWriteTimeoutTyp = 0 ; /* Not supported */
cfi->cfiq->BufWriteTimeoutMax = 0 ; /* Not supported */
}
static void fixup_st_m28w320cb(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
/* Note this is done after the region info is endian swapped */
cfi->cfiq->EraseRegionInfo[1 ] =
(cfi->cfiq->EraseRegionInfo[1 ] & 0 xffff0000) | 0 x3e;
};
static int is_LH28F640BF(struct cfi_private *cfi)
{
/* Sharp LH28F640BF Family */
if (cfi->mfr == CFI_MFR_SHARP && (
cfi->id == LH28F640BFHE_PTTL90 || cfi->id == LH28F640BFHE_PBTL90 ||
cfi->id == LH28F640BFHE_PTTL70A || cfi->id == LH28F640BFHE_PBTL70A))
return 1 ;
return 0 ;
}
static void fixup_LH28F640BF(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
/* Reset the Partition Configuration Register on LH28F640BF
* to a single partition (PCR = 0x000): PCR is embedded into A0-A15. */
if (is_LH28F640BF(cfi)) {
printk(KERN_INFO "Reset Partition Config. Register: 1 Partition of 4 planes\n" );
map_write(map, CMD(0 x60), 0 );
map_write(map, CMD(0 x04), 0 );
/* We have set one single partition thus
* Simultaneous Operations are not allowed */
printk(KERN_INFO "cfi_cmdset_0001: Simultaneous Operations disabled\n" );
extp->FeatureSupport &= ~512 ;
}
}
static void fixup_use_point(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
if (!mtd->_point && map_is_linear(map)) {
mtd->_point = cfi_intelext_point;
mtd->_unpoint = cfi_intelext_unpoint;
}
}
static void fixup_use_write_buffers(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
if (cfi->cfiq->BufWriteTimeoutTyp) {
printk(KERN_INFO "Using buffer write method\n" );
mtd->_write = cfi_intelext_write_buffers;
mtd->_writev = cfi_intelext_writev;
}
}
/*
* Some chips power - up with all sectors locked by default .
*/
static void fixup_unlock_powerup_lock(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
if (cfip->FeatureSupport&32 ) {
printk(KERN_INFO "Using auto-unlock on power-up/resume\n" );
mtd->flags |= MTD_POWERUP_LOCK;
}
}
static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri },
{ CFI_MFR_ATMEL, AT49BV640D, fixup_at49bv640dx_lock },
{ CFI_MFR_ATMEL, AT49BV640DT, fixup_at49bv640dx_lock },
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash },
#endif
#ifdef CMDSET0001_DISABLE_WRITE_SUSPEND
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend },
#endif
#if !FORCE_WORD_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers },
#endif
{ CFI_MFR_ST, 0 x00ba, /* M28W320CT */ fixup_st_m28w320ct },
{ CFI_MFR_ST, 0 x00bb, /* M28W320CB */ fixup_st_m28w320cb },
{ CFI_MFR_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock },
{ CFI_MFR_SHARP, CFI_ID_ANY, fixup_unlock_powerup_lock },
{ CFI_MFR_SHARP, CFI_ID_ANY, fixup_LH28F640BF },
{ 0 , 0 , NULL }
};
static struct cfi_fixup jedec_fixup_table[] = {
{ CFI_MFR_INTEL, I82802AB, fixup_use_fwh_lock },
{ CFI_MFR_INTEL, I82802AC, fixup_use_fwh_lock },
{ CFI_MFR_ST, M50LPW080, fixup_use_fwh_lock },
{ CFI_MFR_ST, M50FLW080A, fixup_use_fwh_lock },
{ CFI_MFR_ST, M50FLW080B, fixup_use_fwh_lock },
{ 0 , 0 , NULL }
};
static struct cfi_fixup fixup_table[] = {
/* The CFI vendor ids and the JEDEC vendor IDs appear
* to be common . It is like the devices id ' s are as
* well . This table is to pick all cases where
* we know that is the case .
*/
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point },
{ 0 , 0 , NULL }
};
static void cfi_fixup_major_minor(struct cfi_private *cfi,
struct cfi_pri_intelext *extp)
{
if (cfi->mfr == CFI_MFR_INTEL &&
cfi->id == PF38F4476 && extp->MinorVersion == '3' )
extp->MinorVersion = '1' ;
}
static int cfi_is_micron_28F00AP30(struct cfi_private *cfi, struct flchip *chip)
{
/*
* Micron ( was Numonyx ) 1 Gbit bottom boot are buggy w . r . t
* Erase Supend for their small Erase Blocks ( 0 x8000 )
*/
if (cfi->mfr == CFI_MFR_INTEL && cfi->id == M28F00AP30)
return 1 ;
return 0 ;
}
static inline struct cfi_pri_intelext *
read_pri_intelext(struct map_info *map, __u16 adr)
{
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp;
unsigned int extra_size = 0 ;
unsigned int extp_size = sizeof (*extp);
again:
extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp" );
if (!extp)
return NULL;
cfi_fixup_major_minor(cfi, extp);
if (extp->MajorVersion != '1' ||
(extp->MinorVersion < '0' || extp->MinorVersion > '5' )) {
printk(KERN_ERR " Unknown Intel/Sharp Extended Query "
"version %c.%c.\n" , extp->MajorVersion,
extp->MinorVersion);
kfree(extp);
return NULL;
}
/* Do some byteswapping if necessary */
extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport);
extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask);
extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr);
if (extp->MinorVersion >= '0' ) {
extra_size = 0 ;
/* Protection Register info */
if (extp->NumProtectionFields) {
struct cfi_intelext_otpinfo *otp =
(struct cfi_intelext_otpinfo *)&extp->extra[0 ];
extra_size += (extp->NumProtectionFields - 1 ) *
sizeof (struct cfi_intelext_otpinfo);
if (extp_size >= sizeof (*extp) + extra_size) {
int i;
/* Do some byteswapping if necessary */
for (i = 0 ; i < extp->NumProtectionFields - 1 ; i++) {
otp->ProtRegAddr = le32_to_cpu(otp->ProtRegAddr);
otp->FactGroups = le16_to_cpu(otp->FactGroups);
otp->UserGroups = le16_to_cpu(otp->UserGroups);
otp++;
}
}
}
}
if (extp->MinorVersion >= '1' ) {
/* Burst Read info */
extra_size += 2 ;
if (extp_size < sizeof (*extp) + extra_size)
goto need_more;
extra_size += extp->extra[extra_size - 1 ];
}
if (extp->MinorVersion >= '3' ) {
int nb_parts, i;
/* Number of hardware-partitions */
extra_size += 1 ;
if (extp_size < sizeof (*extp) + extra_size)
goto need_more;
nb_parts = extp->extra[extra_size - 1 ];
/* skip the sizeof(partregion) field in CFI 1.4 */
if (extp->MinorVersion >= '4' )
extra_size += 2 ;
for (i = 0 ; i < nb_parts; i++) {
struct cfi_intelext_regioninfo *rinfo;
rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size];
extra_size += sizeof (*rinfo);
if (extp_size < sizeof (*extp) + extra_size)
goto need_more;
rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions);
extra_size += (rinfo->NumBlockTypes - 1 )
* sizeof (struct cfi_intelext_blockinfo);
}
if (extp->MinorVersion >= '4' )
extra_size += sizeof (struct cfi_intelext_programming_regioninfo);
if (extp_size < sizeof (*extp) + extra_size) {
need_more:
extp_size = sizeof (*extp) + extra_size;
kfree(extp);
if (extp_size > 4096 ) {
printk(KERN_ERR
"%s: cfi_pri_intelext is too fat\n" ,
__func__);
return NULL;
}
goto again;
}
}
return extp;
}
struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
{
struct cfi_private *cfi = map->fldrv_priv;
struct mtd_info *mtd;
int i;
mtd = kzalloc(sizeof (*mtd), GFP_KERNEL);
if (!mtd)
return NULL;
mtd->priv = map;
mtd->type = MTD_NORFLASH;
/* Fill in the default mtd operations */
mtd->_erase = cfi_intelext_erase_varsize;
mtd->_read = cfi_intelext_read;
mtd->_write = cfi_intelext_write_words;
mtd->_sync = cfi_intelext_sync;
mtd->_lock = cfi_intelext_lock;
mtd->_unlock = cfi_intelext_unlock;
mtd->_is_locked = cfi_intelext_is_locked;
mtd->_suspend = cfi_intelext_suspend;
mtd->_resume = cfi_intelext_resume;
mtd->flags = MTD_CAP_NORFLASH;
mtd->name = map->name;
mtd->writesize = 1 ;
mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
mtd->reboot_notifier.notifier_call = cfi_intelext_reboot;
if (cfi->cfi_mode == CFI_MODE_CFI) {
/*
* It ' s a real CFI chip , not one for which the probe
* routine faked a CFI structure . So we read the feature
* table from it .
*/
__u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
struct cfi_pri_intelext *extp;
extp = read_pri_intelext(map, adr);
if (!extp) {
kfree(mtd);
return NULL;
}
/* Install our own private info structure */
cfi->cmdset_priv = extp;
cfi_fixup(mtd, cfi_fixup_table);
#ifdef DEBUG_CFI_FEATURES
/* Tell the user about it in lots of lovely detail */
cfi_tell_features(extp);
#endif
if (extp->SuspendCmdSupport & 1 ) {
printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n" );
}
}
else if (cfi->cfi_mode == CFI_MODE_JEDEC) {
/* Apply jedec specific fixups */
cfi_fixup(mtd, jedec_fixup_table);
}
/* Apply generic fixups */
cfi_fixup(mtd, fixup_table);
for (i=0 ; i< cfi->numchips; i++) {
if (cfi->cfiq->WordWriteTimeoutTyp)
cfi->chips[i].word_write_time =
1 <<cfi->cfiq->WordWriteTimeoutTyp;
else
cfi->chips[i].word_write_time = 50000 ;
if (cfi->cfiq->BufWriteTimeoutTyp)
cfi->chips[i].buffer_write_time =
1 <<cfi->cfiq->BufWriteTimeoutTyp;
/* No default; if it isn't specified, we won't use it */
if (cfi->cfiq->BlockEraseTimeoutTyp)
cfi->chips[i].erase_time =
1000 <<cfi->cfiq->BlockEraseTimeoutTyp;
else
cfi->chips[i].erase_time = 2000000 ;
if (cfi->cfiq->WordWriteTimeoutTyp &&
cfi->cfiq->WordWriteTimeoutMax)
cfi->chips[i].word_write_time_max =
1 <<(cfi->cfiq->WordWriteTimeoutTyp +
cfi->cfiq->WordWriteTimeoutMax);
else
cfi->chips[i].word_write_time_max = 50000 * 8 ;
if (cfi->cfiq->BufWriteTimeoutTyp &&
cfi->cfiq->BufWriteTimeoutMax)
cfi->chips[i].buffer_write_time_max =
1 <<(cfi->cfiq->BufWriteTimeoutTyp +
cfi->cfiq->BufWriteTimeoutMax);
if (cfi->cfiq->BlockEraseTimeoutTyp &&
cfi->cfiq->BlockEraseTimeoutMax)
cfi->chips[i].erase_time_max =
1000 <<(cfi->cfiq->BlockEraseTimeoutTyp +
cfi->cfiq->BlockEraseTimeoutMax);
else
cfi->chips[i].erase_time_max = 2000000 * 8 ;
cfi->chips[i].ref_point_counter = 0 ;
init_waitqueue_head(&(cfi->chips[i].wq));
}
map->fldrv = &cfi_intelext_chipdrv;
return cfi_intelext_setup(mtd);
}
struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001" )));
struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001" )));
EXPORT_SYMBOL_GPL(cfi_cmdset_0001);
EXPORT_SYMBOL_GPL(cfi_cmdset_0003);
EXPORT_SYMBOL_GPL(cfi_cmdset_0200);
static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
unsigned long offset = 0 ;
int i,j;
unsigned long devsize = (1 <<cfi->cfiq->DevSize) * cfi->interleave;
//printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips);
mtd->size = devsize * cfi->numchips;
mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
mtd->eraseregions = kcalloc(mtd->numeraseregions,
sizeof (struct mtd_erase_region_info),
GFP_KERNEL);
if (!mtd->eraseregions)
goto setup_err;
for (i=0 ; i<cfi->cfiq->NumEraseRegions; i++) {
unsigned long ernum, ersize;
ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8 ) & ~0 xff) * cfi->interleave;
ernum = (cfi->cfiq->EraseRegionInfo[i] & 0 xffff) + 1 ;
if (mtd->erasesize < ersize) {
mtd->erasesize = ersize;
}
for (j=0 ; j<cfi->numchips; j++) {
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset;
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize;
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum;
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1 , GFP_KERNEL);
if (!mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap)
goto setup_err;
}
offset += (ersize * ernum);
}
if (offset != devsize) {
/* Argh */
printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n" , offset, devsize);
goto setup_err;
}
for (i=0 ; i<mtd->numeraseregions;i++){
printk(KERN_DEBUG "erase region %d: offset=0x%llx,size=0x%x,blocks=%d\n" ,
i,(unsigned long long )mtd->eraseregions[i].offset,
mtd->eraseregions[i].erasesize,
mtd->eraseregions[i].numblocks);
}
#ifdef CONFIG_MTD_OTP
mtd->_read_fact_prot_reg = cfi_intelext_read_fact_prot_reg;
mtd->_read_user_prot_reg = cfi_intelext_read_user_prot_reg;
mtd->_write_user_prot_reg = cfi_intelext_write_user_prot_reg;
mtd->_lock_user_prot_reg = cfi_intelext_lock_user_prot_reg;
mtd->_get_fact_prot_info = cfi_intelext_get_fact_prot_info;
mtd->_get_user_prot_info = cfi_intelext_get_user_prot_info;
#endif
/* This function has the potential to distort the reality
a bit and therefore should be called last. */
if (cfi_intelext_partition_fixup(mtd, &cfi) != 0 )
goto setup_err;
__module_get(THIS_MODULE);
register_reboot_notifier(&mtd->reboot_notifier);
return mtd;
setup_err:
if (mtd->eraseregions)
for (i=0 ; i<cfi->cfiq->NumEraseRegions; i++)
for (j=0 ; j<cfi->numchips; j++)
kfree(mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap);
kfree(mtd->eraseregions);
kfree(mtd);
kfree(cfi->cmdset_priv);
return NULL;
}
static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
struct cfi_private **pcfi)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = *pcfi;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
/*
* Probing of multi - partition flash chips .
*
* To support multiple partitions when available , we simply arrange
* for each of them to have their own flchip structure even if they
* are on the same physical chip . This means completely recreating
* a new cfi_private structure right here which is a blatent code
* layering violation , but this is still the least intrusive
* arrangement at this point . This can be rearranged in the future
* if someone feels motivated enough . - - nico
*/
if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3'
&& extp->FeatureSupport & (1 << 9 )) {
int offs = 0 ;
struct cfi_private *newcfi;
struct flchip *chip;
struct flchip_shared *shared;
int numregions, numparts, partshift, numvirtchips, i, j;
/* Protection Register info */
if (extp->NumProtectionFields)
offs = (extp->NumProtectionFields - 1 ) *
sizeof (struct cfi_intelext_otpinfo);
/* Burst Read info */
offs += extp->extra[offs+1 ]+2 ;
/* Number of partition regions */
numregions = extp->extra[offs];
offs += 1 ;
/* skip the sizeof(partregion) field in CFI 1.4 */
if (extp->MinorVersion >= '4' )
offs += 2 ;
/* Number of hardware partitions */
numparts = 0 ;
for (i = 0 ; i < numregions; i++) {
struct cfi_intelext_regioninfo *rinfo;
rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs];
numparts += rinfo->NumIdentPartitions;
offs += sizeof (*rinfo)
+ (rinfo->NumBlockTypes - 1 ) *
sizeof (struct cfi_intelext_blockinfo);
}
if (!numparts)
numparts = 1 ;
/* Programming Region info */
if (extp->MinorVersion >= '4' ) {
struct cfi_intelext_programming_regioninfo *prinfo;
prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs];
mtd->writesize = cfi->interleave << prinfo->ProgRegShift;
mtd->flags &= ~MTD_BIT_WRITEABLE;
printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n" ,
map->name, mtd->writesize,
cfi->interleave * prinfo->ControlValid,
cfi->interleave * prinfo->ControlInvalid);
}
/*
* All functions below currently rely on all chips having
* the same geometry so we ' ll just assume that all hardware
* partitions are of the same size too .
*/
partshift = cfi->chipshift - __ffs(numparts);
if ((1 << partshift) < mtd->erasesize) {
printk( KERN_ERR
"%s: bad number of hw partitions (%d)\n" ,
__func__, numparts);
return -EINVAL;
}
numvirtchips = cfi->numchips * numparts;
newcfi = kmalloc(struct_size(newcfi, chips, numvirtchips),
GFP_KERNEL);
if (!newcfi)
return -ENOMEM;
shared = kmalloc_array(cfi->numchips,
sizeof (struct flchip_shared),
GFP_KERNEL);
if (!shared) {
kfree(newcfi);
return -ENOMEM;
}
memcpy(newcfi, cfi, sizeof (struct cfi_private));
newcfi->numchips = numvirtchips;
newcfi->chipshift = partshift;
chip = &newcfi->chips[0 ];
for (i = 0 ; i < cfi->numchips; i++) {
shared[i].writing = shared[i].erasing = NULL;
mutex_init(&shared[i].lock);
for (j = 0 ; j < numparts; j++) {
*chip = cfi->chips[i];
chip->start += j << partshift;
chip->priv = &shared[i];
/* those should be reset too since
they create memory references. */
init_waitqueue_head(&chip->wq);
mutex_init(&chip->mutex);
chip++;
}
}
printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips "
"--> %d partitions of %d KiB\n" ,
map->name, cfi->numchips, cfi->interleave,
newcfi->numchips, 1 <<(newcfi->chipshift-10 ));
map->fldrv_priv = newcfi;
*pcfi = newcfi;
kfree(cfi);
}
return 0 ;
}
/*
* * * * * * * * * * * * CHIP ACCESS FUNCTIONS * * * * * * * * * * *
*/
static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
{
DECLARE_WAITQUEUE(wait, current);
struct cfi_private *cfi = map->fldrv_priv;
map_word status, status_OK = CMD(0 x80), status_PWS = CMD(0 x01);
struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
unsigned long timeo = jiffies + HZ;
/* Prevent setting state FL_SYNCING for chip in suspended state. */
if (mode == FL_SYNCING && chip->oldstate != FL_READY)
goto sleep;
switch (chip->state) {
case FL_STATUS:
for (;;) {
status = map_read(map, adr);
if (map_word_andequal(map, status, status_OK, status_OK))
break ;
/* At this point we're fine with write operations
in other partitions as they don't conflict. */
if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS))
break ;
mutex_unlock(&chip->mutex);
cfi_udelay(1 );
mutex_lock(&chip->mutex);
/* Someone else might have been playing with it. */
return -EAGAIN;
}
fallthrough;
case FL_READY:
case FL_CFI_QUERY:
case FL_JEDEC_QUERY:
return 0 ;
case FL_ERASING:
if (!cfip ||
!(cfip->FeatureSupport & 2 ) ||
!(mode == FL_READY || mode == FL_POINT ||
(mode == FL_WRITING && (cfip->SuspendCmdSupport & 1 ))))
goto sleep;
/* Do not allow suspend iff read/write to EB address */
if ((adr & chip->in_progress_block_mask) ==
chip->in_progress_block_addr)
goto sleep;
/* do not suspend small EBs, buggy Micron Chips */
if (cfi_is_micron_28F00AP30(cfi, chip) &&
(chip->in_progress_block_mask == ~(0 x8000-1 )))
goto sleep;
/* Erase suspend */
map_write(map, CMD(0 xB0), chip->in_progress_block_addr);
/* If the flash has finished erasing, then 'erase suspend'
* appears to make some ( 28 F320 ) flash devices switch to
* ' read ' mode . Make sure that we switch to ' read status '
* mode so we get the right data . - - rmk
*/
map_write(map, CMD(0 x70), chip->in_progress_block_addr);
chip->oldstate = FL_ERASING;
chip->state = FL_ERASE_SUSPENDING;
chip->erase_suspended = 1 ;
for (;;) {
status = map_read(map, chip->in_progress_block_addr);
if (map_word_andequal(map, status, status_OK, status_OK))
break ;
if (time_after(jiffies, timeo)) {
/* Urgh. Resume and pretend we weren't here.
* Make sure we're in 'read status' mode if it had finished */
put_chip(map, chip, adr);
printk(KERN_ERR "%s: Chip not ready after erase "
"suspended: status = 0x%lx\n" , map->name, status.x[0 ]);
return -EIO;
}
mutex_unlock(&chip->mutex);
cfi_udelay(1 );
mutex_lock(&chip->mutex);
/* Nobody will touch it while it's in state FL_ERASE_SUSPENDING.
So we can just loop here. */
}
chip->state = FL_STATUS;
return 0 ;
case FL_XIP_WHILE_ERASING:
if (mode != FL_READY && mode != FL_POINT &&
(mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1 )))
goto sleep;
chip->oldstate = chip->state;
chip->state = FL_READY;
return 0 ;
case FL_SHUTDOWN:
/* The machine is rebooting now,so no one can get chip anymore */
return -EIO;
case FL_POINT:
/* Only if there's no operation suspended... */
if (mode == FL_READY && chip->oldstate == FL_READY)
return 0 ;
fallthrough;
default :
sleep:
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
mutex_unlock(&chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
mutex_lock(&chip->mutex);
return -EAGAIN;
}
}
static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
{
int ret;
DECLARE_WAITQUEUE(wait, current);
retry:
if (chip->priv &&
(mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE
|| mode == FL_SHUTDOWN) && chip->state != FL_SYNCING) {
/*
* OK . We have possibility for contention on the write / erase
* operations which are global to the real chip and not per
* partition . So let ' s fight it over in the partition which
* currently has authority on the operation .
*
* The rules are as follows :
*
* - any write operation must own shared - > writing .
*
* - any erase operation must own _ both_ shared - > writing and
* shared - > erasing .
*
* - contention arbitration is handled in the owner ' s context .
*
* The ' shared ' struct can be read and / or written only when
* its lock is taken .
*/
struct flchip_shared *shared = chip->priv;
struct flchip *contender;
mutex_lock(&shared->lock);
contender = shared->writing;
if (contender && contender != chip) {
/*
* The engine to perform desired operation on this
* partition is already in use by someone else .
* Let ' s fight over it in the context of the chip
* currently using it . If it is possible to suspend ,
* that other partition will do just that , otherwise
* it ' ll happily send us to sleep . In any case , when
* get_chip returns success we ' re clear to go ahead .
*/
ret = mutex_trylock(&contender->mutex);
mutex_unlock(&shared->lock);
if (!ret)
goto retry;
mutex_unlock(&chip->mutex);
ret = chip_ready(map, contender, contender->start, mode);
mutex_lock(&chip->mutex);
if (ret == -EAGAIN) {
mutex_unlock(&contender->mutex);
goto retry;
}
if (ret) {
mutex_unlock(&contender->mutex);
return ret;
}
mutex_lock(&shared->lock);
/* We should not own chip if it is already
* in FL_SYNCING state. Put contender and retry. */
if (chip->state == FL_SYNCING) {
put_chip(map, contender, contender->start);
mutex_unlock(&contender->mutex);
goto retry;
}
mutex_unlock(&contender->mutex);
}
/* Check if we already have suspended erase
* on this chip. Sleep. */
if (mode == FL_ERASING && shared->erasing
&& shared->erasing->oldstate == FL_ERASING) {
mutex_unlock(&shared->lock);
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
mutex_unlock(&chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
mutex_lock(&chip->mutex);
goto retry;
}
/* We now own it */
shared->writing = chip;
if (mode == FL_ERASING)
shared->erasing = chip;
mutex_unlock(&shared->lock);
}
ret = chip_ready(map, chip, adr, mode);
if (ret == -EAGAIN)
goto retry;
return ret;
}
static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr)
{
struct cfi_private *cfi = map->fldrv_priv;
if (chip->priv) {
struct flchip_shared *shared = chip->priv;
mutex_lock(&shared->lock);
if (shared->writing == chip && chip->oldstate == FL_READY) {
/* We own the ability to write, but we're done */
shared->writing = shared->erasing;
if (shared->writing && shared->writing != chip) {
/* give back ownership to who we loaned it from */
struct flchip *loaner = shared->writing;
mutex_lock(&loaner->mutex);
mutex_unlock(&shared->lock);
mutex_unlock(&chip->mutex);
put_chip(map, loaner, loaner->start);
mutex_lock(&chip->mutex);
mutex_unlock(&loaner->mutex);
wake_up(&chip->wq);
return ;
}
shared->erasing = NULL;
shared->writing = NULL;
} else if (shared->erasing == chip && shared->writing != chip) {
/*
* We own the ability to erase without the ability
* to write , which means the erase was suspended
* and some other partition is currently writing .
* Don ' t let the switch below mess things up since
* we don ' t have ownership to resume anything .
*/
mutex_unlock(&shared->lock);
wake_up(&chip->wq);
return ;
}
mutex_unlock(&shared->lock);
}
switch (chip->oldstate) {
case FL_ERASING:
/* What if one interleaved chip has finished and the
other hasn ' t ? The old code would leave the finished
one in READY mode . That ' s bad , and caused - EROFS
errors to be returned from do_erase_oneblock because
that ' s the only bit it checked for at the time .
As the state machine appears to explicitly allow
sending the 0 x70 ( Read Status ) command to an erasing
chip and expecting it to be ignored , that ' s what we
do. */
map_write(map, CMD(0 xd0), chip->in_progress_block_addr);
map_write(map, CMD(0 x70), chip->in_progress_block_addr);
chip->oldstate = FL_READY;
chip->state = FL_ERASING;
break ;
case FL_XIP_WHILE_ERASING:
chip->state = chip->oldstate;
chip->oldstate = FL_READY;
break ;
case FL_READY:
case FL_STATUS:
case FL_JEDEC_QUERY:
break ;
default :
printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n" , map->name, chip->oldstate);
}
wake_up(&chip->wq);
}
#ifdef CONFIG_MTD_XIP
/*
* No interrupt what so ever can be serviced while the flash isn ' t in array
* mode . This is ensured by the xip_disable ( ) and xip_enable ( ) functions
* enclosing any code path where the flash is known not to be in array mode .
* And within a XIP disabled code path , only functions marked with _ _ xipram
* may be called and nothing else ( it ' s a good thing to inspect generated
* assembly to make sure inline functions were actually inlined and that gcc
* didn ' t emit calls to its own support functions ) . Also configuring MTD CFI
* support to a single buswidth and a single interleave is also recommended .
*/
static void xip_disable(struct map_info *map, struct flchip *chip,
unsigned long adr)
{
/* TODO: chips with no XIP use should ignore and return */
(void ) map_read(map, adr); /* ensure mmu mapping is up to date */
local_irq_disable();
}
static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
unsigned long adr)
{
struct cfi_private *cfi = map->fldrv_priv;
if (chip->state != FL_POINT && chip->state != FL_READY) {
map_write(map, CMD(0 xff), adr);
chip->state = FL_READY;
}
(void ) map_read(map, adr);
xip_iprefetch();
local_irq_enable();
}
/*
* When a delay is required for the flash operation to complete , the
* xip_wait_for_operation ( ) function is polling for both the given timeout
* and pending ( but still masked ) hardware interrupts . Whenever there is an
* interrupt pending then the flash erase or write operation is suspended ,
* array mode restored and interrupts unmasked . Task scheduling might also
* happen at that point . The CPU eventually returns from the interrupt or
* the call to schedule ( ) and the suspended flash operation is resumed for
* the remaining of the delay period .
*
* Warning : this function _ will_ fool interrupt latency tracing tools .
*/
static int __xipram xip_wait_for_operation(
struct map_info *map, struct flchip *chip,
unsigned long adr, unsigned int chip_op_time_max)
{
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
map_word status, OK = CMD(0 x80);
unsigned long usec, suspended, start, done;
flstate_t oldstate, newstate;
start = xip_currtime();
usec = chip_op_time_max;
if (usec == 0 )
usec = 500000 ;
done = 0 ;
do {
cpu_relax();
if (xip_irqpending() && cfip &&
((chip->state == FL_ERASING && (cfip->FeatureSupport&2 )) ||
(chip->state == FL_WRITING && (cfip->FeatureSupport&4 ))) &&
(cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) {
/*
* Let ' s suspend the erase or write operation when
* supported . Note that we currently don ' t try to
* suspend interleaved chips if there is already
* another operation suspended ( imagine what happens
* when one chip was already done with the current
* operation while another chip suspended it , then
* we resume the whole thing at once ) . Yes , it
* can happen !
*/
usec -= done;
map_write(map, CMD(0 xb0), adr);
map_write(map, CMD(0 x70), adr);
suspended = xip_currtime();
do {
if (xip_elapsed_since(suspended) > 100000 ) {
/*
* The chip doesn ' t want to suspend
* after waiting for 100 msecs .
* This is a critical error but there
* is not much we can do here .
*/
return -EIO;
}
status = map_read(map, adr);
} while (!map_word_andequal(map, status, OK, OK));
/* Suspend succeeded */
oldstate = chip->state;
if (oldstate == FL_ERASING) {
if (!map_word_bitsset(map, status, CMD(0 x40)))
break ;
newstate = FL_XIP_WHILE_ERASING;
chip->erase_suspended = 1 ;
} else {
if (!map_word_bitsset(map, status, CMD(0 x04)))
break ;
newstate = FL_XIP_WHILE_WRITING;
chip->write_suspended = 1 ;
}
chip->state = newstate;
map_write(map, CMD(0 xff), adr);
(void ) map_read(map, adr);
xip_iprefetch();
local_irq_enable();
mutex_unlock(&chip->mutex);
xip_iprefetch();
cond_resched();
/*
* We ' re back . However someone else might have
* decided to go write to the chip if we are in
* a suspended erase state . If so let ' s wait
* until it ' s done .
*/
mutex_lock(&chip->mutex);
while (chip->state != newstate) {
DECLARE_WAITQUEUE(wait, current);
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
mutex_unlock(&chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
mutex_lock(&chip->mutex);
}
/* Disallow XIP again */
local_irq_disable();
/* Resume the write or erase operation */
map_write(map, CMD(0 xd0), adr);
map_write(map, CMD(0 x70), adr);
chip->state = oldstate;
start = xip_currtime();
} else if (usec >= 1000000 /HZ) {
/*
* Try to save on CPU power when waiting delay
* is at least a system timer tick period .
* No need to be extremely accurate here .
*/
xip_cpu_idle();
}
status = map_read(map, adr);
done = xip_elapsed_since(start);
} while (!map_word_andequal(map, status, OK, OK)
&& done < usec);
return (done >= usec) ? -ETIME : 0 ;
}
/*
* The INVALIDATE_CACHED_RANGE ( ) macro is normally used in parallel while
* the flash is actively programming or erasing since we have to poll for
* the operation to complete anyway . We can ' t do that in a generic way with
* a XIP setup so do it before the actual flash operation in this case
* and stub it out from INVAL_CACHE_AND_WAIT .
*/
#define XIP_INVAL_CACHED_RANGE(map, from, size) \
INVALIDATE_CACHED_RANGE(map, from, size)
#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec, usec_max) \
xip_wait_for_operation(map, chip, cmd_adr, usec_max)
#else
#define xip_disable(map, chip, adr)
#define xip_enable(map, chip, adr)
#define XIP_INVAL_CACHED_RANGE(x...)
#define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation
static int inval_cache_and_wait_for_operation(
struct map_info *map, struct flchip *chip,
unsigned long cmd_adr, unsigned long inval_adr, int inval_len,
unsigned int chip_op_time, unsigned int chip_op_time_max)
{
struct cfi_private *cfi = map->fldrv_priv;
map_word status, status_OK = CMD(0 x80);
int chip_state = chip->state;
unsigned int timeo, sleep_time, reset_timeo;
mutex_unlock(&chip->mutex);
if (inval_len)
INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len);
mutex_lock(&chip->mutex);
timeo = chip_op_time_max;
if (!timeo)
timeo = 500000 ;
reset_timeo = timeo;
sleep_time = chip_op_time / 2 ;
for (;;) {
if (chip->state != chip_state) {
/* Someone's suspended the operation: sleep */
DECLARE_WAITQUEUE(wait, current);
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
mutex_unlock(&chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
mutex_lock(&chip->mutex);
continue ;
}
status = map_read(map, cmd_adr);
if (map_word_andequal(map, status, status_OK, status_OK))
break ;
if (chip->erase_suspended && chip_state == FL_ERASING) {
/* Erase suspend occurred while sleep: reset timeout */
timeo = reset_timeo;
chip->erase_suspended = 0 ;
}
if (chip->write_suspended && chip_state == FL_WRITING) {
/* Write suspend occurred while sleep: reset timeout */
timeo = reset_timeo;
chip->write_suspended = 0 ;
}
if (!timeo) {
map_write(map, CMD(0 x70), cmd_adr);
chip->state = FL_STATUS;
return -ETIME;
}
/* OK Still waiting. Drop the lock, wait a while and retry. */
mutex_unlock(&chip->mutex);
if (sleep_time >= 1000000 /HZ) {
/*
* Half of the normal delay still remaining
* can be performed with a sleeping delay instead
* of busy waiting .
*/
msleep(sleep_time/1000 );
timeo -= sleep_time;
sleep_time = 1000000 /HZ;
} else {
udelay(1 );
cond_resched();
timeo--;
}
mutex_lock(&chip->mutex);
}
/* Done and happy. */
chip->state = FL_STATUS;
return 0 ;
}
#endif
#define WAIT_TIMEOUT(map, chip, adr, udelay, udelay_max) \
INVAL_CACHE_AND_WAIT(map, chip, adr, 0 , 0 , udelay, udelay_max);
static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len)
{
unsigned long cmd_addr;
struct cfi_private *cfi = map->fldrv_priv;
int ret;
adr += chip->start;
/* Ensure cmd read/writes are aligned. */
cmd_addr = adr & ~(map_bankwidth(map)-1 );
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, cmd_addr, FL_POINT);
if (!ret) {
if (chip->state != FL_POINT && chip->state != FL_READY)
map_write(map, CMD(0 xff), cmd_addr);
chip->state = FL_POINT;
chip->ref_point_counter++;
}
mutex_unlock(&chip->mutex);
return ret;
}
static int cfi_intelext_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
unsigned long ofs, last_end = 0 ;
int chipnum;
int ret;
if (!map->virt)
return -EINVAL;
/* Now lock the chip(s) to POINT state */
/* ofs: offset within the first chip that the first read should start */
chipnum = (from >> cfi->chipshift);
ofs = from - (chipnum << cfi->chipshift);
*virt = map->virt + cfi->chips[chipnum].start + ofs;
if (phys)
*phys = map->phys + cfi->chips[chipnum].start + ofs;
while (len) {
unsigned long thislen;
if (chipnum >= cfi->numchips)
break ;
/* We cannot point across chips that are virtually disjoint */
if (!last_end)
last_end = cfi->chips[chipnum].start;
else if (cfi->chips[chipnum].start != last_end)
break ;
if ((len + ofs -1 ) >> cfi->chipshift)
thislen = (1 <<cfi->chipshift) - ofs;
else
thislen = len;
ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen);
if (ret)
break ;
*retlen += thislen;
len -= thislen;
ofs = 0 ;
last_end += 1 << cfi->chipshift;
chipnum++;
}
return 0 ;
}
static int cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
unsigned long ofs;
int chipnum, err = 0 ;
/* Now unlock the chip(s) POINT state */
/* ofs: offset within the first chip that the first read should start */
chipnum = (from >> cfi->chipshift);
ofs = from - (chipnum << cfi->chipshift);
while (len && !err) {
unsigned long thislen;
struct flchip *chip;
chip = &cfi->chips[chipnum];
if (chipnum >= cfi->numchips)
break ;
if ((len + ofs -1 ) >> cfi->chipshift)
thislen = (1 <<cfi->chipshift) - ofs;
else
thislen = len;
mutex_lock(&chip->mutex);
if (chip->state == FL_POINT) {
chip->ref_point_counter--;
if (chip->ref_point_counter == 0 )
chip->state = FL_READY;
} else {
printk(KERN_ERR "%s: Error: unpoint called on non pointed region\n" , map->name);
err = -EINVAL;
}
put_chip(map, chip, chip->start);
mutex_unlock(&chip->mutex);
len -= thislen;
ofs = 0 ;
chipnum++;
}
return err;
}
static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
{
unsigned long cmd_addr;
struct cfi_private *cfi = map->fldrv_priv;
int ret;
adr += chip->start;
/* Ensure cmd read/writes are aligned. */
cmd_addr = adr & ~(map_bankwidth(map)-1 );
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, cmd_addr, FL_READY);
if (ret) {
mutex_unlock(&chip->mutex);
return ret;
}
if (chip->state != FL_POINT && chip->state != FL_READY) {
map_write(map, CMD(0 xff), cmd_addr);
chip->state = FL_READY;
}
map_copy_from(map, buf, adr, len);
put_chip(map, chip, cmd_addr);
mutex_unlock(&chip->mutex);
return 0 ;
}
static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
unsigned long ofs;
int chipnum;
int ret = 0 ;
/* ofs: offset within the first chip that the first read should start */
chipnum = (from >> cfi->chipshift);
ofs = from - (chipnum << cfi->chipshift);
while (len) {
unsigned long thislen;
if (chipnum >= cfi->numchips)
break ;
if ((len + ofs -1 ) >> cfi->chipshift)
thislen = (1 <<cfi->chipshift) - ofs;
else
thislen = len;
ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
if (ret)
break ;
*retlen += thislen;
len -= thislen;
buf += thislen;
ofs = 0 ;
chipnum++;
}
return ret;
}
static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
unsigned long adr, map_word datum, int mode)
{
struct cfi_private *cfi = map->fldrv_priv;
map_word status, write_cmd;
int ret;
adr += chip->start;
switch (mode) {
case FL_WRITING:
write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0 x40) : CMD(0 x41);
break ;
case FL_OTP_WRITE:
write_cmd = CMD(0 xc0);
break ;
default :
return -EINVAL;
}
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, adr, mode);
if (ret) {
mutex_unlock(&chip->mutex);
return ret;
}
XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map));
ENABLE_VPP(map);
xip_disable(map, chip, adr);
map_write(map, write_cmd, adr);
map_write(map, datum, adr);
chip->state = mode;
ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
adr, map_bankwidth(map),
chip->word_write_time,
chip->word_write_time_max);
if (ret) {
xip_enable(map, chip, adr);
printk(KERN_ERR "%s: word write error (status timeout)\n" , map->name);
goto out;
}
/* check for errors */
status = map_read(map, adr);
if (map_word_bitsset(map, status, CMD(0 x1a))) {
unsigned long chipstatus = MERGESTATUS(status);
/* reset status */
map_write(map, CMD(0 x50), adr);
map_write(map, CMD(0 x70), adr);
xip_enable(map, chip, adr);
if (chipstatus & 0 x02) {
ret = -EROFS;
} else if (chipstatus & 0 x08) {
printk(KERN_ERR "%s: word write error (bad VPP)\n" , map->name);
ret = -EIO;
} else {
printk(KERN_ERR "%s: word write error (status 0x%lx)\n" , map->name, chipstatus);
ret = -EINVAL;
}
goto out;
}
xip_enable(map, chip, adr);
out: DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
return ret;
}
static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
int ret;
int chipnum;
unsigned long ofs;
chipnum = to >> cfi->chipshift;
ofs = to - (chipnum << cfi->chipshift);
/* If it's not bus-aligned, do the first byte write */
if (ofs & (map_bankwidth(map)-1 )) {
unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1 );
int gap = ofs - bus_ofs;
int n;
map_word datum;
n = min_t(int , len, map_bankwidth(map)-gap);
datum = map_word_ff(map);
datum = map_word_load_partial(map, datum, buf, gap, n);
ret = do_write_oneword(map, &cfi->chips[chipnum],
bus_ofs, datum, FL_WRITING);
if (ret)
return ret;
len -= n;
ofs += n;
buf += n;
(*retlen) += n;
if (ofs >> cfi->chipshift) {
chipnum ++;
ofs = 0 ;
if (chipnum == cfi->numchips)
return 0 ;
}
}
while (len >= map_bankwidth(map)) {
map_word datum = map_word_load(map, buf);
ret = do_write_oneword(map, &cfi->chips[chipnum],
ofs, datum, FL_WRITING);
if (ret)
return ret;
ofs += map_bankwidth(map);
buf += map_bankwidth(map);
(*retlen) += map_bankwidth(map);
len -= map_bankwidth(map);
if (ofs >> cfi->chipshift) {
chipnum ++;
ofs = 0 ;
if (chipnum == cfi->numchips)
return 0 ;
}
}
if (len & (map_bankwidth(map)-1 )) {
map_word datum;
datum = map_word_ff(map);
datum = map_word_load_partial(map, datum, buf, 0 , len);
ret = do_write_oneword(map, &cfi->chips[chipnum],
ofs, datum, FL_WRITING);
if (ret)
return ret;
(*retlen) += len;
}
return 0 ;
}
static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
unsigned long adr, const struct kvec **pvec,
unsigned long *pvec_seek, int len)
{
struct cfi_private *cfi = map->fldrv_priv;
map_word status, write_cmd, datum;
unsigned long cmd_adr;
int ret, wbufsize, word_gap, words;
const struct kvec *vec;
unsigned long vec_seek;
unsigned long initial_adr;
int initial_len = len;
wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
adr += chip->start;
initial_adr = adr;
cmd_adr = adr & ~(wbufsize-1 );
/* Sharp LH28F640BF chips need the first address for the
* Page Buffer Program command . See Table 5 of
* LH28F320BF, LH28F640BF, LH28F128BF Series (Appendix FUM00701) */
if (is_LH28F640BF(cfi))
cmd_adr = adr;
/* Let's determine this according to the interleave only once */
write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0 xe8) : CMD(0 xe9);
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, cmd_adr, FL_WRITING);
if (ret) {
mutex_unlock(&chip->mutex);
return ret;
}
XIP_INVAL_CACHED_RANGE(map, initial_adr, initial_len);
ENABLE_VPP(map);
xip_disable(map, chip, cmd_adr);
/* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set
[ . . . ] , the device will not accept any more Write to Buffer commands " .
So we must check here and reset those bits if they ' re set . Otherwise
we're just pissing in the wind */
if (chip->state != FL_STATUS) {
map_write(map, CMD(0 x70), cmd_adr);
chip->state = FL_STATUS;
}
status = map_read(map, cmd_adr);
if (map_word_bitsset(map, status, CMD(0 x30))) {
xip_enable(map, chip, cmd_adr);
printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n" , status.x[0 ]);
xip_disable(map, chip, cmd_adr);
map_write(map, CMD(0 x50), cmd_adr);
map_write(map, CMD(0 x70), cmd_adr);
}
chip->state = FL_WRITING_TO_BUFFER;
map_write(map, write_cmd, cmd_adr);
ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0 , 0 );
if (ret) {
/* Argh. Not ready for write to buffer */
map_word Xstatus = map_read(map, cmd_adr);
map_write(map, CMD(0 x70), cmd_adr);
chip->state = FL_STATUS;
status = map_read(map, cmd_adr);
map_write(map, CMD(0 x50), cmd_adr);
map_write(map, CMD(0 x70), cmd_adr);
xip_enable(map, chip, cmd_adr);
printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n" ,
map->name, Xstatus.x[0 ], status.x[0 ]);
goto out;
}
/* Figure out the number of words to write */
word_gap = (-adr & (map_bankwidth(map)-1 ));
words = DIV_ROUND_UP(len - word_gap, map_bankwidth(map));
if (!word_gap) {
words--;
} else {
word_gap = map_bankwidth(map) - word_gap;
adr -= word_gap;
datum = map_word_ff(map);
}
/* Write length of data to come */
map_write(map, CMD(words), cmd_adr );
/* Write data */
vec = *pvec;
vec_seek = *pvec_seek;
do {
int n = map_bankwidth(map) - word_gap;
if (n > vec->iov_len - vec_seek)
n = vec->iov_len - vec_seek;
if (n > len)
n = len;
if (!word_gap && len < map_bankwidth(map))
datum = map_word_ff(map);
datum = map_word_load_partial(map, datum,
vec->iov_base + vec_seek,
word_gap, n);
len -= n;
word_gap += n;
if (!len || word_gap == map_bankwidth(map)) {
map_write(map, datum, adr);
adr += map_bankwidth(map);
word_gap = 0 ;
}
vec_seek += n;
if (vec_seek == vec->iov_len) {
vec++;
vec_seek = 0 ;
}
} while (len);
*pvec = vec;
*pvec_seek = vec_seek;
/* GO GO GO */
map_write(map, CMD(0 xd0), cmd_adr);
chip->state = FL_WRITING;
ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr,
initial_adr, initial_len,
chip->buffer_write_time,
chip->buffer_write_time_max);
if (ret) {
map_write(map, CMD(0 x70), cmd_adr);
chip->state = FL_STATUS;
xip_enable(map, chip, cmd_adr);
printk(KERN_ERR "%s: buffer write error (status timeout)\n" , map->name);
goto out;
}
/* check for errors */
status = map_read(map, cmd_adr);
if (map_word_bitsset(map, status, CMD(0 x1a))) {
unsigned long chipstatus = MERGESTATUS(status);
/* reset status */
map_write(map, CMD(0 x50), cmd_adr);
map_write(map, CMD(0 x70), cmd_adr);
xip_enable(map, chip, cmd_adr);
if (chipstatus & 0 x02) {
ret = -EROFS;
} else if (chipstatus & 0 x08) {
printk(KERN_ERR "%s: buffer write error (bad VPP)\n" , map->name);
ret = -EIO;
} else {
printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n" , map->name, chipstatus);
ret = -EINVAL;
}
goto out;
}
xip_enable(map, chip, cmd_adr);
out: DISABLE_VPP(map);
put_chip(map, chip, cmd_adr);
mutex_unlock(&chip->mutex);
return ret;
}
static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs,
unsigned long count, loff_t to, size_t *retlen)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
int ret;
int chipnum;
unsigned long ofs, vec_seek, i;
size_t len = 0 ;
for (i = 0 ; i < count; i++)
len += vecs[i].iov_len;
if (!len)
return 0 ;
chipnum = to >> cfi->chipshift;
ofs = to - (chipnum << cfi->chipshift);
vec_seek = 0 ;
do {
/* We must not cross write block boundaries */
int size = wbufsize - (ofs & (wbufsize-1 ));
if (size > len)
size = len;
ret = do_write_buffer(map, &cfi->chips[chipnum],
ofs, &vecs, &vec_seek, size);
if (ret)
return ret;
ofs += size;
(*retlen) += size;
len -= size;
if (ofs >> cfi->chipshift) {
chipnum ++;
ofs = 0 ;
if (chipnum == cfi->numchips)
return 0 ;
}
/* Be nice and reschedule with the chip in a usable state for other
processes. */
cond_resched();
} while (len);
return 0 ;
}
static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to,
size_t len, size_t *retlen, const u_char *buf)
{
struct kvec vec;
vec.iov_base = (void *) buf;
vec.iov_len = len;
return cfi_intelext_writev(mtd, &vec, 1 , to, retlen);
}
static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
unsigned long adr, int len, void *thunk)
{
struct cfi_private *cfi = map->fldrv_priv;
map_word status;
int retries = 3 ;
int ret;
adr += chip->start;
retry:
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, adr, FL_ERASING);
if (ret) {
mutex_unlock(&chip->mutex);
return ret;
}
XIP_INVAL_CACHED_RANGE(map, adr, len);
ENABLE_VPP(map);
xip_disable(map, chip, adr);
/* Clear the status register first */
map_write(map, CMD(0 x50), adr);
/* Now erase */
map_write(map, CMD(0 x20), adr);
map_write(map, CMD(0 xD0), adr);
chip->state = FL_ERASING;
chip->erase_suspended = 0 ;
chip->in_progress_block_addr = adr;
chip->in_progress_block_mask = ~(len - 1 );
ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
adr, len,
chip->erase_time,
chip->erase_time_max);
if (ret) {
map_write(map, CMD(0 x70), adr);
chip->state = FL_STATUS;
xip_enable(map, chip, adr);
printk(KERN_ERR "%s: block erase error: (status timeout)\n" , map->name);
goto out;
}
/* We've broken this before. It doesn't hurt to be safe */
map_write(map, CMD(0 x70), adr);
chip->state = FL_STATUS;
status = map_read(map, adr);
/* check for errors */
if (map_word_bitsset(map, status, CMD(0 x3a))) {
unsigned long chipstatus = MERGESTATUS(status);
/* Reset the error bits */
map_write(map, CMD(0 x50), adr);
map_write(map, CMD(0 x70), adr);
xip_enable(map, chip, adr);
if ((chipstatus & 0 x30) == 0 x30) {
printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n" , map->name, chipstatus);
ret = -EINVAL;
} else if (chipstatus & 0 x02) {
/* Protection bit set */
ret = -EROFS;
} else if (chipstatus & 0 x8) {
/* Voltage */
printk(KERN_ERR "%s: block erase error: (bad VPP)\n" , map->name);
ret = -EIO;
} else if (chipstatus & 0 x20 && retries--) {
printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n" , adr, chipstatus);
DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
goto retry;
} else {
printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n" , map->name, adr, chipstatus);
ret = -EIO;
}
goto out;
}
xip_enable(map, chip, adr);
out: DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
return ret;
}
static int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
{
return cfi_varsize_frob(mtd, do_erase_oneblock, instr->addr,
instr->len, NULL);
}
static void cfi_intelext_sync (struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
int i;
struct flchip *chip;
int ret = 0 ;
for (i=0 ; !ret && i<cfi->numchips; i++) {
chip = &cfi->chips[i];
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, chip->start, FL_SYNCING);
if (!ret) {
chip->oldstate = chip->state;
chip->state = FL_SYNCING;
/* No need to wake_up() on this state change -
* as the whole point is that nobody can do anything
* with the chip now anyway .
*/
}
mutex_unlock(&chip->mutex);
}
/* Unlock the chips again */
for (i--; i >=0 ; i--) {
chip = &cfi->chips[i];
mutex_lock(&chip->mutex);
if (chip->state == FL_SYNCING) {
chip->state = chip->oldstate;
chip->oldstate = FL_READY;
wake_up(&chip->wq);
}
mutex_unlock(&chip->mutex);
}
}
static int __xipram do_getlockstatus_oneblock(struct map_info *map,
struct flchip *chip,
unsigned long adr,
int len, void *thunk)
{
struct cfi_private *cfi = map->fldrv_priv;
int status, ofs_factor = cfi->interleave * cfi->device_type;
adr += chip->start;
xip_disable(map, chip, adr+(2 *ofs_factor));
map_write(map, CMD(0 x90), adr+(2 *ofs_factor));
chip->state = FL_JEDEC_QUERY;
status = cfi_read_query(map, adr+(2 *ofs_factor));
xip_enable(map, chip, 0 );
return status;
}
#ifdef DEBUG_LOCK_BITS
static int __xipram do_printlockstatus_oneblock(struct map_info *map,
struct flchip *chip,
unsigned long adr,
int len, void *thunk)
{
printk(KERN_DEBUG "block status register for 0x%08lx is %x\n" ,
adr, do_getlockstatus_oneblock(map, chip, adr, len, thunk));
return 0 ;
}
#endif
#define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1 )
#define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2 )
static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip,
unsigned long adr, int len, void *thunk)
{
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
int mdelay;
int ret;
adr += chip->start;
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, adr, FL_LOCKING);
if (ret) {
mutex_unlock(&chip->mutex);
return ret;
}
ENABLE_VPP(map);
xip_disable(map, chip, adr);
map_write(map, CMD(0 x60), adr);
if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) {
map_write(map, CMD(0 x01), adr);
chip->state = FL_LOCKING;
} else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) {
map_write(map, CMD(0 xD0), adr);
chip->state = FL_UNLOCKING;
} else
BUG();
/*
* If Instant Individual Block Locking supported then no need
* to delay .
*/
/*
* Unlocking may take up to 1 . 4 seconds on some Intel flashes . So
* lets use a max of 1 . 5 seconds ( 1500 ms ) as timeout .
*
* See " Clear Block Lock - Bits Time " on page 40 in
* " 3 Volt Intel StrataFlash Memory " 28 F128J3 , 28 F640J3 , 28 F320J3 manual
* from February 2003
*/
mdelay = (!extp || !(extp->FeatureSupport & (1 << 5 ))) ? 1500 : 0 ;
ret = WAIT_TIMEOUT(map, chip, adr, mdelay, mdelay * 1000 );
if (ret) {
map_write(map, CMD(0 x70), adr);
chip->state = FL_STATUS;
xip_enable(map, chip, adr);
printk(KERN_ERR "%s: block unlock error: (status timeout)\n" , map->name);
goto out;
}
xip_enable(map, chip, adr);
out: DISABLE_VPP(map);
put_chip(map, chip, adr);
mutex_unlock(&chip->mutex);
return ret;
}
static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
int ret;
#ifdef DEBUG_LOCK_BITS
printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n" ,
__func__, ofs, len);
cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
ofs, len, NULL);
#endif
ret = cfi_varsize_frob(mtd, do_xxlock_oneblock,
ofs, len, DO_XXLOCK_ONEBLOCK_LOCK);
#ifdef DEBUG_LOCK_BITS
printk(KERN_DEBUG "%s: lock status after, ret=%d\n" ,
__func__, ret);
cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
ofs, len, NULL);
#endif
return ret;
}
static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
int ret;
#ifdef DEBUG_LOCK_BITS
printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n" ,
__func__, ofs, len);
cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
ofs, len, NULL);
#endif
ret = cfi_varsize_frob(mtd, do_xxlock_oneblock,
ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK);
#ifdef DEBUG_LOCK_BITS
printk(KERN_DEBUG "%s: lock status after, ret=%d\n" ,
__func__, ret);
cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
ofs, len, NULL);
#endif
return ret;
}
static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs,
uint64_t len)
{
return cfi_varsize_frob(mtd, do_getlockstatus_oneblock,
ofs, len, NULL) ? 1 : 0 ;
}
#ifdef CONFIG_MTD_OTP
typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip,
u_long data_offset, u_char *buf, u_int size,
u_long prot_offset, u_int groupno, u_int groupsize);
static int __xipram
do_otp_read(struct map_info *map, struct flchip *chip, u_long offset,
u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz)
{
struct cfi_private *cfi = map->fldrv_priv;
int ret;
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY);
if (ret) {
mutex_unlock(&chip->mutex);
return ret;
}
/* let's ensure we're not reading back cached data from array mode */
INVALIDATE_CACHED_RANGE(map, chip->start + offset, size);
xip_disable(map, chip, chip->start);
if (chip->state != FL_JEDEC_QUERY) {
map_write(map, CMD(0 x90), chip->start);
chip->state = FL_JEDEC_QUERY;
}
map_copy_from(map, buf, chip->start + offset, size);
xip_enable(map, chip, chip->start);
/* then ensure we don't keep OTP data in the cache */
INVALIDATE_CACHED_RANGE(map, chip->start + offset, size);
put_chip(map, chip, chip->start);
mutex_unlock(&chip->mutex);
return 0 ;
}
static int
do_otp_write(struct map_info *map, struct flchip *chip, u_long offset,
u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz)
{
int ret;
while (size) {
unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1 );
int gap = offset - bus_ofs;
int n = min_t(int , size, map_bankwidth(map)-gap);
map_word datum = map_word_ff(map);
datum = map_word_load_partial(map, datum, buf, gap, n);
ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE);
if (ret)
return ret;
offset += n;
buf += n;
size -= n;
}
return 0 ;
}
static int
do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset,
u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz)
{
struct cfi_private *cfi = map->fldrv_priv;
map_word datum;
/* make sure area matches group boundaries */
if (size != grpsz)
return -EXDEV;
datum = map_word_ff(map);
datum = map_word_clr(map, datum, CMD(1 << grpno));
return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE);
}
static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf,
otp_op_t action, int user_regs)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
struct flchip *chip;
struct cfi_intelext_otpinfo *otp;
u_long devsize, reg_prot_offset, data_offset;
u_int chip_num, chip_step, field, reg_fact_size, reg_user_size;
u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups;
int ret;
*retlen = 0 ;
/* Check that we actually have some OTP registers */
if (!extp || !(extp->FeatureSupport & 64 ) || !extp->NumProtectionFields)
return -ENODATA;
/* we need real chips here not virtual ones */
devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave;
chip_step = devsize >> cfi->chipshift;
chip_num = 0 ;
/* Some chips have OTP located in the _top_ partition only.
For example: Intel 28F256L18T (T means top-parameter device) */
if (cfi->mfr == CFI_MFR_INTEL) {
switch (cfi->id) {
case 0 x880b:
case 0 x880c:
case 0 x880d:
chip_num = chip_step - 1 ;
}
}
for ( ; chip_num < cfi->numchips; chip_num += chip_step) {
chip = &cfi->chips[chip_num];
otp = (struct cfi_intelext_otpinfo *)&extp->extra[0 ];
/* first OTP region */
field = 0 ;
reg_prot_offset = extp->ProtRegAddr;
reg_fact_groups = 1 ;
reg_fact_size = 1 << extp->FactProtRegSize;
reg_user_groups = 1 ;
reg_user_size = 1 << extp->UserProtRegSize;
while (len > 0 ) {
/* flash geometry fixup */
data_offset = reg_prot_offset + 1 ;
data_offset *= cfi->interleave * cfi->device_type;
reg_prot_offset *= cfi->interleave * cfi->device_type;
reg_fact_size *= cfi->interleave;
reg_user_size *= cfi->interleave;
if (user_regs) {
groups = reg_user_groups;
groupsize = reg_user_size;
/* skip over factory reg area */
groupno = reg_fact_groups;
data_offset += reg_fact_groups * reg_fact_size;
} else {
groups = reg_fact_groups;
groupsize = reg_fact_size;
groupno = 0 ;
}
while (len > 0 && groups > 0 ) {
if (!action) {
/*
* Special case : if action is NULL
* we fill buf with otp_info records .
*/
struct otp_info *otpinfo;
map_word lockword;
len -= sizeof (struct otp_info);
if (len <= 0 )
return -ENOSPC;
ret = do_otp_read(map, chip,
reg_prot_offset,
(u_char *)&lockword,
map_bankwidth(map),
0 , 0 , 0 );
if (ret)
return ret;
otpinfo = (struct otp_info *)buf;
otpinfo->start = from;
otpinfo->length = groupsize;
otpinfo->locked =
!map_word_bitsset(map, lockword,
CMD(1 << groupno));
from += groupsize;
buf += sizeof (*otpinfo);
*retlen += sizeof (*otpinfo);
} else if (from >= groupsize) {
from -= groupsize;
data_offset += groupsize;
} else {
int size = groupsize;
data_offset += from;
size -= from;
from = 0 ;
if (size > len)
size = len;
ret = action(map, chip, data_offset,
buf, size, reg_prot_offset,
groupno, groupsize);
if (ret < 0 )
return ret;
buf += size;
len -= size;
*retlen += size;
data_offset += size;
}
groupno++;
groups--;
}
/* next OTP region */
if (++field == extp->NumProtectionFields)
break ;
reg_prot_offset = otp->ProtRegAddr;
reg_fact_groups = otp->FactGroups;
reg_fact_size = 1 << otp->FactProtRegSize;
reg_user_groups = otp->UserGroups;
reg_user_size = 1 << otp->UserProtRegSize;
otp++;
}
}
return 0 ;
}
static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen,
u_char *buf)
{
return cfi_intelext_otp_walk(mtd, from, len, retlen,
buf, do_otp_read, 0 );
}
static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen,
u_char *buf)
{
return cfi_intelext_otp_walk(mtd, from, len, retlen,
buf, do_otp_read, 1 );
}
static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen,
const u_char *buf)
{
return cfi_intelext_otp_walk(mtd, from, len, retlen,
(u_char *)buf, do_otp_write, 1 );
}
static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd,
loff_t from, size_t len)
{
size_t retlen;
return cfi_intelext_otp_walk(mtd, from, len, &retlen,
NULL, do_otp_lock, 1 );
}
static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
return cfi_intelext_otp_walk(mtd, 0 , len, retlen, (u_char *)buf,
NULL, 0 );
}
static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, size_t len,
size_t *retlen, struct otp_info *buf)
{
return cfi_intelext_otp_walk(mtd, 0 , len, retlen, (u_char *)buf,
NULL, 1 );
}
#endif
static void cfi_intelext_save_locks(struct mtd_info *mtd)
{
struct mtd_erase_region_info *region;
int block, status, i;
unsigned long adr;
size_t len;
for (i = 0 ; i < mtd->numeraseregions; i++) {
region = &mtd->eraseregions[i];
if (!region->lockmap)
continue ;
for (block = 0 ; block < region->numblocks; block++){
len = region->erasesize;
adr = region->offset + block * len;
status = cfi_varsize_frob(mtd,
do_getlockstatus_oneblock, adr, len, NULL);
if (status)
set_bit(block, region->lockmap);
else
clear_bit(block, region->lockmap);
}
}
}
static int cfi_intelext_suspend(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
int i;
struct flchip *chip;
int ret = 0 ;
if ((mtd->flags & MTD_POWERUP_LOCK)
&& extp && (extp->FeatureSupport & (1 << 5 )))
cfi_intelext_save_locks(mtd);
for (i=0 ; !ret && i<cfi->numchips; i++) {
chip = &cfi->chips[i];
mutex_lock(&chip->mutex);
switch (chip->state) {
case FL_READY:
case FL_STATUS:
case FL_CFI_QUERY:
case FL_JEDEC_QUERY:
if (chip->oldstate == FL_READY) {
/* place the chip in a known state before suspend */
map_write(map, CMD(0 xFF), cfi->chips[i].start);
chip->oldstate = chip->state;
chip->state = FL_PM_SUSPENDED;
/* No need to wake_up() on this state change -
* as the whole point is that nobody can do anything
* with the chip now anyway .
*/
} else {
/* There seems to be an operation pending. We must wait for it. */
printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n" , chip->oldstate);
ret = -EAGAIN;
}
break ;
default :
/* Should we actually wait? Once upon a time these routines weren't
allowed to . Or should we return - EAGAIN , because the upper layers
ought to have already shut down anything which was using the device
anyway? The latter for now. */
printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n" , chip->state);
ret = -EAGAIN;
break ;
case FL_PM_SUSPENDED:
break ;
}
mutex_unlock(&chip->mutex);
}
/* Unlock the chips again */
if (ret) {
for (i--; i >=0 ; i--) {
chip = &cfi->chips[i];
mutex_lock(&chip->mutex);
if (chip->state == FL_PM_SUSPENDED) {
/* No need to force it into a known state here,
because we ' re returning failure , and it didn ' t
get power cycled */
chip->state = chip->oldstate;
chip->oldstate = FL_READY;
wake_up(&chip->wq);
}
mutex_unlock(&chip->mutex);
}
}
return ret;
}
static void cfi_intelext_restore_locks(struct mtd_info *mtd)
{
struct mtd_erase_region_info *region;
int block, i;
unsigned long adr;
size_t len;
for (i = 0 ; i < mtd->numeraseregions; i++) {
region = &mtd->eraseregions[i];
if (!region->lockmap)
continue ;
for_each_clear_bit(block, region->lockmap, region->numblocks) {
len = region->erasesize;
adr = region->offset + block * len;
cfi_intelext_unlock(mtd, adr, len);
}
}
}
static void cfi_intelext_resume(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
int i;
struct flchip *chip;
for (i=0 ; i<cfi->numchips; i++) {
chip = &cfi->chips[i];
mutex_lock(&chip->mutex);
/* Go to known state. Chip may have been power cycled */
if (chip->state == FL_PM_SUSPENDED) {
/* Refresh LH28F640BF Partition Config. Register */
fixup_LH28F640BF(mtd);
map_write(map, CMD(0 xFF), cfi->chips[i].start);
chip->oldstate = chip->state = FL_READY;
wake_up(&chip->wq);
}
mutex_unlock(&chip->mutex);
}
if ((mtd->flags & MTD_POWERUP_LOCK)
&& extp && (extp->FeatureSupport & (1 << 5 )))
cfi_intelext_restore_locks(mtd);
}
static int cfi_intelext_reset(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
int i, ret;
for (i=0 ; i < cfi->numchips; i++) {
struct flchip *chip = &cfi->chips[i];
/* force the completion of any ongoing operation
and switch to array mode so any bootloader in
flash is accessible for soft reboot. */
mutex_lock(&chip->mutex);
ret = get_chip(map, chip, chip->start, FL_SHUTDOWN);
if (!ret) {
map_write(map, CMD(0 xff), chip->start);
chip->state = FL_SHUTDOWN;
put_chip(map, chip, chip->start);
}
mutex_unlock(&chip->mutex);
}
return 0 ;
}
static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val,
void *v)
{
struct mtd_info *mtd;
mtd = container_of(nb, struct mtd_info, reboot_notifier);
cfi_intelext_reset(mtd);
return NOTIFY_DONE;
}
static void cfi_intelext_destroy(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct mtd_erase_region_info *region;
int i;
cfi_intelext_reset(mtd);
unregister_reboot_notifier(&mtd->reboot_notifier);
kfree(cfi->cmdset_priv);
kfree(cfi->cfiq);
kfree(cfi->chips[0 ].priv);
kfree(cfi);
for (i = 0 ; i < mtd->numeraseregions; i++) {
region = &mtd->eraseregions[i];
kfree(region->lockmap);
}
kfree(mtd->eraseregions);
}
MODULE_LICENSE("GPL" );
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al." );
MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips" );
MODULE_ALIAS("cfi_cmdset_0003" );
MODULE_ALIAS("cfi_cmdset_0200" );
Messung V0.5 in Prozent C=95 H=87 G=90
¤ Dauer der Verarbeitung: 0.45 Sekunden
(vorverarbeitet am 2026-09-27)
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