forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
462 lines
13 KiB
462 lines
13 KiB
/* |
|
Common Flash Interface probe code. |
|
(C) 2000 Red Hat. GPL'd. |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/types.h> |
|
#include <linux/kernel.h> |
|
#include <linux/init.h> |
|
#include <asm/io.h> |
|
#include <asm/byteorder.h> |
|
#include <linux/errno.h> |
|
#include <linux/slab.h> |
|
#include <linux/interrupt.h> |
|
|
|
#include <linux/mtd/xip.h> |
|
#include <linux/mtd/map.h> |
|
#include <linux/mtd/cfi.h> |
|
#include <linux/mtd/gen_probe.h> |
|
|
|
//#define DEBUG_CFI |
|
|
|
#ifdef DEBUG_CFI |
|
static void print_cfi_ident(struct cfi_ident *); |
|
#endif |
|
|
|
static int cfi_probe_chip(struct map_info *map, __u32 base, |
|
unsigned long *chip_map, struct cfi_private *cfi); |
|
static int cfi_chip_setup(struct map_info *map, struct cfi_private *cfi); |
|
|
|
struct mtd_info *cfi_probe(struct map_info *map); |
|
|
|
#ifdef CONFIG_MTD_XIP |
|
|
|
/* only needed for short periods, so this is rather simple */ |
|
#define xip_disable() local_irq_disable() |
|
|
|
#define xip_allowed(base, map) \ |
|
do { \ |
|
(void) map_read(map, base); \ |
|
xip_iprefetch(); \ |
|
local_irq_enable(); \ |
|
} while (0) |
|
|
|
#define xip_enable(base, map, cfi) \ |
|
do { \ |
|
cfi_qry_mode_off(base, map, cfi); \ |
|
xip_allowed(base, map); \ |
|
} while (0) |
|
|
|
#define xip_disable_qry(base, map, cfi) \ |
|
do { \ |
|
xip_disable(); \ |
|
cfi_qry_mode_on(base, map, cfi); \ |
|
} while (0) |
|
|
|
#else |
|
|
|
#define xip_disable() do { } while (0) |
|
#define xip_allowed(base, map) do { } while (0) |
|
#define xip_enable(base, map, cfi) do { } while (0) |
|
#define xip_disable_qry(base, map, cfi) do { } while (0) |
|
|
|
#endif |
|
|
|
/* |
|
* This fixup occurs immediately after reading the CFI structure and can affect |
|
* the number of chips detected, unlike cfi_fixup, which occurs after an |
|
* mtd_info structure has been created for the chip. |
|
*/ |
|
struct cfi_early_fixup { |
|
uint16_t mfr; |
|
uint16_t id; |
|
void (*fixup)(struct cfi_private *cfi); |
|
}; |
|
|
|
static void cfi_early_fixup(struct cfi_private *cfi, |
|
const struct cfi_early_fixup *fixups) |
|
{ |
|
const struct cfi_early_fixup *f; |
|
|
|
for (f = fixups; f->fixup; f++) { |
|
if (((f->mfr == CFI_MFR_ANY) || (f->mfr == cfi->mfr)) && |
|
((f->id == CFI_ID_ANY) || (f->id == cfi->id))) { |
|
f->fixup(cfi); |
|
} |
|
} |
|
} |
|
|
|
/* check for QRY. |
|
in: interleave,type,mode |
|
ret: table index, <0 for error |
|
*/ |
|
|
|
static int __xipram cfi_probe_chip(struct map_info *map, __u32 base, |
|
unsigned long *chip_map, struct cfi_private *cfi) |
|
{ |
|
int i; |
|
|
|
if ((base + 0) >= map->size) { |
|
printk(KERN_NOTICE |
|
"Probe at base[0x00](0x%08lx) past the end of the map(0x%08lx)\n", |
|
(unsigned long)base, map->size -1); |
|
return 0; |
|
} |
|
if ((base + 0xff) >= map->size) { |
|
printk(KERN_NOTICE |
|
"Probe at base[0x55](0x%08lx) past the end of the map(0x%08lx)\n", |
|
(unsigned long)base + 0x55, map->size -1); |
|
return 0; |
|
} |
|
|
|
xip_disable(); |
|
if (!cfi_qry_mode_on(base, map, cfi)) { |
|
xip_enable(base, map, cfi); |
|
return 0; |
|
} |
|
|
|
if (!cfi->numchips) { |
|
/* This is the first time we're called. Set up the CFI |
|
stuff accordingly and return */ |
|
return cfi_chip_setup(map, cfi); |
|
} |
|
|
|
/* Check each previous chip to see if it's an alias */ |
|
for (i=0; i < (base >> cfi->chipshift); i++) { |
|
unsigned long start; |
|
if(!test_bit(i, chip_map)) { |
|
/* Skip location; no valid chip at this address */ |
|
continue; |
|
} |
|
start = i << cfi->chipshift; |
|
/* This chip should be in read mode if it's one |
|
we've already touched. */ |
|
if (cfi_qry_present(map, start, cfi)) { |
|
/* Eep. This chip also had the QRY marker. |
|
* Is it an alias for the new one? */ |
|
cfi_qry_mode_off(start, map, cfi); |
|
|
|
/* If the QRY marker goes away, it's an alias */ |
|
if (!cfi_qry_present(map, start, cfi)) { |
|
xip_allowed(base, map); |
|
printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n", |
|
map->name, base, start); |
|
return 0; |
|
} |
|
/* Yes, it's actually got QRY for data. Most |
|
* unfortunate. Stick the new chip in read mode |
|
* too and if it's the same, assume it's an alias. */ |
|
/* FIXME: Use other modes to do a proper check */ |
|
cfi_qry_mode_off(base, map, cfi); |
|
|
|
if (cfi_qry_present(map, base, cfi)) { |
|
xip_allowed(base, map); |
|
printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n", |
|
map->name, base, start); |
|
return 0; |
|
} |
|
} |
|
} |
|
|
|
/* OK, if we got to here, then none of the previous chips appear to |
|
be aliases for the current one. */ |
|
set_bit((base >> cfi->chipshift), chip_map); /* Update chip map */ |
|
cfi->numchips++; |
|
|
|
/* Put it back into Read Mode */ |
|
cfi_qry_mode_off(base, map, cfi); |
|
xip_allowed(base, map); |
|
|
|
printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n", |
|
map->name, cfi->interleave, cfi->device_type*8, base, |
|
map->bankwidth*8); |
|
|
|
return 1; |
|
} |
|
|
|
static void fixup_s70gl02gs_chips(struct cfi_private *cfi) |
|
{ |
|
/* |
|
* S70GL02GS flash reports a single 256 MiB chip, but is really made up |
|
* of two 128 MiB chips with 1024 sectors each. |
|
*/ |
|
cfi->cfiq->DevSize = 27; |
|
cfi->cfiq->EraseRegionInfo[0] = 0x20003ff; |
|
pr_warn("Bad S70GL02GS CFI data; adjust to detect 2 chips\n"); |
|
} |
|
|
|
static const struct cfi_early_fixup cfi_early_fixup_table[] = { |
|
{ CFI_MFR_AMD, 0x4801, fixup_s70gl02gs_chips }, |
|
{ }, |
|
}; |
|
|
|
static int __xipram cfi_chip_setup(struct map_info *map, |
|
struct cfi_private *cfi) |
|
{ |
|
int ofs_factor = cfi->interleave*cfi->device_type; |
|
__u32 base = 0; |
|
int num_erase_regions = cfi_read_query(map, base + (0x10 + 28)*ofs_factor); |
|
int i; |
|
int addr_unlock1 = 0x555, addr_unlock2 = 0x2AA; |
|
|
|
xip_enable(base, map, cfi); |
|
#ifdef DEBUG_CFI |
|
printk("Number of erase regions: %d\n", num_erase_regions); |
|
#endif |
|
if (!num_erase_regions) |
|
return 0; |
|
|
|
cfi->cfiq = kmalloc(sizeof(struct cfi_ident) + num_erase_regions * 4, GFP_KERNEL); |
|
if (!cfi->cfiq) |
|
return 0; |
|
|
|
memset(cfi->cfiq,0,sizeof(struct cfi_ident)); |
|
|
|
cfi->cfi_mode = CFI_MODE_CFI; |
|
|
|
cfi->sector_erase_cmd = CMD(0x30); |
|
|
|
/* Read the CFI info structure */ |
|
xip_disable_qry(base, map, cfi); |
|
for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++) |
|
((unsigned char *)cfi->cfiq)[i] = cfi_read_query(map,base + (0x10 + i)*ofs_factor); |
|
|
|
/* Do any necessary byteswapping */ |
|
cfi->cfiq->P_ID = le16_to_cpu(cfi->cfiq->P_ID); |
|
|
|
cfi->cfiq->P_ADR = le16_to_cpu(cfi->cfiq->P_ADR); |
|
cfi->cfiq->A_ID = le16_to_cpu(cfi->cfiq->A_ID); |
|
cfi->cfiq->A_ADR = le16_to_cpu(cfi->cfiq->A_ADR); |
|
cfi->cfiq->InterfaceDesc = le16_to_cpu(cfi->cfiq->InterfaceDesc); |
|
cfi->cfiq->MaxBufWriteSize = le16_to_cpu(cfi->cfiq->MaxBufWriteSize); |
|
|
|
#ifdef DEBUG_CFI |
|
/* Dump the information therein */ |
|
print_cfi_ident(cfi->cfiq); |
|
#endif |
|
|
|
for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
|
cfi->cfiq->EraseRegionInfo[i] = le32_to_cpu(cfi->cfiq->EraseRegionInfo[i]); |
|
|
|
#ifdef DEBUG_CFI |
|
printk(" Erase Region #%d: BlockSize 0x%4.4X bytes, %d blocks\n", |
|
i, (cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff, |
|
(cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1); |
|
#endif |
|
} |
|
|
|
if (cfi->cfiq->P_ID == P_ID_SST_OLD) { |
|
addr_unlock1 = 0x5555; |
|
addr_unlock2 = 0x2AAA; |
|
} |
|
|
|
/* |
|
* Note we put the device back into Read Mode BEFORE going into Auto |
|
* Select Mode, as some devices support nesting of modes, others |
|
* don't. This way should always work. |
|
* On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and |
|
* so should be treated as nops or illegal (and so put the device |
|
* back into Read Mode, which is a nop in this case). |
|
*/ |
|
cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL); |
|
cfi_send_gen_cmd(0xaa, addr_unlock1, base, map, cfi, cfi->device_type, NULL); |
|
cfi_send_gen_cmd(0x55, addr_unlock2, base, map, cfi, cfi->device_type, NULL); |
|
cfi_send_gen_cmd(0x90, addr_unlock1, base, map, cfi, cfi->device_type, NULL); |
|
cfi->mfr = cfi_read_query16(map, base); |
|
cfi->id = cfi_read_query16(map, base + ofs_factor); |
|
|
|
/* Get AMD/Spansion extended JEDEC ID */ |
|
if (cfi->mfr == CFI_MFR_AMD && (cfi->id & 0xff) == 0x7e) |
|
cfi->id = cfi_read_query(map, base + 0xe * ofs_factor) << 8 | |
|
cfi_read_query(map, base + 0xf * ofs_factor); |
|
|
|
/* Put it back into Read Mode */ |
|
cfi_qry_mode_off(base, map, cfi); |
|
xip_allowed(base, map); |
|
|
|
cfi_early_fixup(cfi, cfi_early_fixup_table); |
|
|
|
printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank. Manufacturer ID %#08x Chip ID %#08x\n", |
|
map->name, cfi->interleave, cfi->device_type*8, base, |
|
map->bankwidth*8, cfi->mfr, cfi->id); |
|
|
|
return 1; |
|
} |
|
|
|
#ifdef DEBUG_CFI |
|
static char *vendorname(__u16 vendor) |
|
{ |
|
switch (vendor) { |
|
case P_ID_NONE: |
|
return "None"; |
|
|
|
case P_ID_INTEL_EXT: |
|
return "Intel/Sharp Extended"; |
|
|
|
case P_ID_AMD_STD: |
|
return "AMD/Fujitsu Standard"; |
|
|
|
case P_ID_INTEL_STD: |
|
return "Intel/Sharp Standard"; |
|
|
|
case P_ID_AMD_EXT: |
|
return "AMD/Fujitsu Extended"; |
|
|
|
case P_ID_WINBOND: |
|
return "Winbond Standard"; |
|
|
|
case P_ID_ST_ADV: |
|
return "ST Advanced"; |
|
|
|
case P_ID_MITSUBISHI_STD: |
|
return "Mitsubishi Standard"; |
|
|
|
case P_ID_MITSUBISHI_EXT: |
|
return "Mitsubishi Extended"; |
|
|
|
case P_ID_SST_PAGE: |
|
return "SST Page Write"; |
|
|
|
case P_ID_SST_OLD: |
|
return "SST 39VF160x/39VF320x"; |
|
|
|
case P_ID_INTEL_PERFORMANCE: |
|
return "Intel Performance Code"; |
|
|
|
case P_ID_INTEL_DATA: |
|
return "Intel Data"; |
|
|
|
case P_ID_RESERVED: |
|
return "Not Allowed / Reserved for Future Use"; |
|
|
|
default: |
|
return "Unknown"; |
|
} |
|
} |
|
|
|
|
|
static void print_cfi_ident(struct cfi_ident *cfip) |
|
{ |
|
#if 0 |
|
if (cfip->qry[0] != 'Q' || cfip->qry[1] != 'R' || cfip->qry[2] != 'Y') { |
|
printk("Invalid CFI ident structure.\n"); |
|
return; |
|
} |
|
#endif |
|
printk("Primary Vendor Command Set: %4.4X (%s)\n", cfip->P_ID, vendorname(cfip->P_ID)); |
|
if (cfip->P_ADR) |
|
printk("Primary Algorithm Table at %4.4X\n", cfip->P_ADR); |
|
else |
|
printk("No Primary Algorithm Table\n"); |
|
|
|
printk("Alternative Vendor Command Set: %4.4X (%s)\n", cfip->A_ID, vendorname(cfip->A_ID)); |
|
if (cfip->A_ADR) |
|
printk("Alternate Algorithm Table at %4.4X\n", cfip->A_ADR); |
|
else |
|
printk("No Alternate Algorithm Table\n"); |
|
|
|
|
|
printk("Vcc Minimum: %2d.%d V\n", cfip->VccMin >> 4, cfip->VccMin & 0xf); |
|
printk("Vcc Maximum: %2d.%d V\n", cfip->VccMax >> 4, cfip->VccMax & 0xf); |
|
if (cfip->VppMin) { |
|
printk("Vpp Minimum: %2d.%d V\n", cfip->VppMin >> 4, cfip->VppMin & 0xf); |
|
printk("Vpp Maximum: %2d.%d V\n", cfip->VppMax >> 4, cfip->VppMax & 0xf); |
|
} |
|
else |
|
printk("No Vpp line\n"); |
|
|
|
printk("Typical byte/word write timeout: %d µs\n", 1<<cfip->WordWriteTimeoutTyp); |
|
printk("Maximum byte/word write timeout: %d µs\n", (1<<cfip->WordWriteTimeoutMax) * (1<<cfip->WordWriteTimeoutTyp)); |
|
|
|
if (cfip->BufWriteTimeoutTyp || cfip->BufWriteTimeoutMax) { |
|
printk("Typical full buffer write timeout: %d µs\n", 1<<cfip->BufWriteTimeoutTyp); |
|
printk("Maximum full buffer write timeout: %d µs\n", (1<<cfip->BufWriteTimeoutMax) * (1<<cfip->BufWriteTimeoutTyp)); |
|
} |
|
else |
|
printk("Full buffer write not supported\n"); |
|
|
|
printk("Typical block erase timeout: %d ms\n", 1<<cfip->BlockEraseTimeoutTyp); |
|
printk("Maximum block erase timeout: %d ms\n", (1<<cfip->BlockEraseTimeoutMax) * (1<<cfip->BlockEraseTimeoutTyp)); |
|
if (cfip->ChipEraseTimeoutTyp || cfip->ChipEraseTimeoutMax) { |
|
printk("Typical chip erase timeout: %d ms\n", 1<<cfip->ChipEraseTimeoutTyp); |
|
printk("Maximum chip erase timeout: %d ms\n", (1<<cfip->ChipEraseTimeoutMax) * (1<<cfip->ChipEraseTimeoutTyp)); |
|
} |
|
else |
|
printk("Chip erase not supported\n"); |
|
|
|
printk("Device size: 0x%X bytes (%d MiB)\n", 1 << cfip->DevSize, 1<< (cfip->DevSize - 20)); |
|
printk("Flash Device Interface description: 0x%4.4X\n", cfip->InterfaceDesc); |
|
switch(cfip->InterfaceDesc) { |
|
case CFI_INTERFACE_X8_ASYNC: |
|
printk(" - x8-only asynchronous interface\n"); |
|
break; |
|
|
|
case CFI_INTERFACE_X16_ASYNC: |
|
printk(" - x16-only asynchronous interface\n"); |
|
break; |
|
|
|
case CFI_INTERFACE_X8_BY_X16_ASYNC: |
|
printk(" - supports x8 and x16 via BYTE# with asynchronous interface\n"); |
|
break; |
|
|
|
case CFI_INTERFACE_X32_ASYNC: |
|
printk(" - x32-only asynchronous interface\n"); |
|
break; |
|
|
|
case CFI_INTERFACE_X16_BY_X32_ASYNC: |
|
printk(" - supports x16 and x32 via Word# with asynchronous interface\n"); |
|
break; |
|
|
|
case CFI_INTERFACE_NOT_ALLOWED: |
|
printk(" - Not Allowed / Reserved\n"); |
|
break; |
|
|
|
default: |
|
printk(" - Unknown\n"); |
|
break; |
|
} |
|
|
|
printk("Max. bytes in buffer write: 0x%x\n", 1<< cfip->MaxBufWriteSize); |
|
printk("Number of Erase Block Regions: %d\n", cfip->NumEraseRegions); |
|
|
|
} |
|
#endif /* DEBUG_CFI */ |
|
|
|
static struct chip_probe cfi_chip_probe = { |
|
.name = "CFI", |
|
.probe_chip = cfi_probe_chip |
|
}; |
|
|
|
struct mtd_info *cfi_probe(struct map_info *map) |
|
{ |
|
/* |
|
* Just use the generic probe stuff to call our CFI-specific |
|
* chip_probe routine in all the possible permutations, etc. |
|
*/ |
|
return mtd_do_chip_probe(map, &cfi_chip_probe); |
|
} |
|
|
|
static struct mtd_chip_driver cfi_chipdrv = { |
|
.probe = cfi_probe, |
|
.name = "cfi_probe", |
|
.module = THIS_MODULE |
|
}; |
|
|
|
static int __init cfi_probe_init(void) |
|
{ |
|
register_mtd_chip_driver(&cfi_chipdrv); |
|
return 0; |
|
} |
|
|
|
static void __exit cfi_probe_exit(void) |
|
{ |
|
unregister_mtd_chip_driver(&cfi_chipdrv); |
|
} |
|
|
|
module_init(cfi_probe_init); |
|
module_exit(cfi_probe_exit); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("David Woodhouse <[email protected]> et al."); |
|
MODULE_DESCRIPTION("Probe code for CFI-compliant flash chips");
|
|
|