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path: root/drivers/mtd/cfi_flash.c
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Diffstat (limited to 'drivers/mtd/cfi_flash.c')
-rw-r--r--drivers/mtd/cfi_flash.c176
1 files changed, 90 insertions, 86 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index 6c18252..14c2061 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -171,6 +171,38 @@ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* FLASH chips info */
typedef unsigned long flash_sect_t;
+/* CFI standard query structure */
+struct cfi_qry {
+ u8 qry[3];
+ u16 p_id;
+ u16 p_adr;
+ u16 a_id;
+ u16 a_adr;
+ u8 vcc_min;
+ u8 vcc_max;
+ u8 vpp_min;
+ u8 vpp_max;
+ u8 word_write_timeout_typ;
+ u8 buf_write_timeout_typ;
+ u8 block_erase_timeout_typ;
+ u8 chip_erase_timeout_typ;
+ u8 word_write_timeout_max;
+ u8 buf_write_timeout_max;
+ u8 block_erase_timeout_max;
+ u8 chip_erase_timeout_max;
+ u8 dev_size;
+ u16 interface_desc;
+ u16 max_buf_write_size;
+ u8 num_erase_regions;
+ u32 erase_region_info[NUM_ERASE_REGIONS];
+} __attribute__((packed));
+
+struct cfi_pri_hdr {
+ u8 pri[3];
+ u8 major_version;
+ u8 minor_version;
+} __attribute__((packed));
+
static void flash_write8(u8 value, void *addr)
{
__raw_writeb(value, addr);
@@ -291,28 +323,24 @@ static void print_longlong (char *str, unsigned long long data)
sprintf (&str[i * 2], "%2.2x", *cp++);
}
-static void flash_printqry (flash_info_t * info, flash_sect_t sect)
+static void flash_printqry (struct cfi_qry *qry)
{
- void *addr;
+ u8 *p = (u8 *)qry;
int x, y;
- for (x = 0; x < 0x40; x += 16U / info->portwidth) {
- addr = flash_map(info, sect, x + FLASH_OFFSET_CFI_RESP);
- debug ("%p : ", addr);
- for (y = 0; y < 16; y++) {
- debug ("%2.2x ", flash_read8(addr + y));
- }
- debug (" ");
+ for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
+ debug("%02x : ", x);
+ for (y = 0; y < 16; y++)
+ debug("%2.2x ", p[x + y]);
+ debug(" ");
for (y = 0; y < 16; y++) {
- unsigned char c = flash_read8(addr + y);
- if (c >= 0x20 && c <= 0x7e) {
- debug ("%c", c);
- } else {
- debug (".");
- }
+ unsigned char c = p[x + y];
+ if (c >= 0x20 && c <= 0x7e)
+ debug("%c", c);
+ else
+ debug(".");
}
- debug ("\n");
- flash_unmap(info, sect, x + FLASH_OFFSET_CFI_RESP, addr);
+ debug("\n");
}
}
#endif
@@ -337,41 +365,6 @@ static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
}
/*-----------------------------------------------------------------------
- * read a short word by swapping for ppc format.
- */
-static ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect,
- uint offset)
-{
- uchar *addr;
- ushort retval;
-
-#ifdef DEBUG
- int x;
-#endif
- addr = flash_map (info, sect, offset);
-
-#ifdef DEBUG
- debug ("ushort addr is at %p info->portwidth = %d\n", addr,
- info->portwidth);
- for (x = 0; x < 2 * info->portwidth; x++) {
- debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
- }
-#endif
-#if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
- retval = ((flash_read8(addr + info->portwidth) << 8) |
- flash_read8(addr));
-#else
- retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 8) |
- flash_read8(addr + info->portwidth - 1));
-#endif
-
- debug ("retval = 0x%x\n", retval);
- flash_unmap (info, sect, offset, addr);
-
- return retval;
-}
-
-/*-----------------------------------------------------------------------
* read a long word by picking the least significant byte of each maximum
* port size word. Swap for ppc format.
*/
@@ -1427,7 +1420,17 @@ static inline int flash_detect_legacy(ulong base, int banknum)
* detect if flash is compatible with the Common Flash Interface (CFI)
* http://www.jedec.org/download/search/jesd68.pdf
*/
-static int __flash_detect_cfi (flash_info_t * info)
+static void flash_read_cfi (flash_info_t *info, void *buf,
+ unsigned int start, size_t len)
+{
+ u8 *p = buf;
+ unsigned int i;
+
+ for (i = 0; i < len; i++)
+ p[i] = flash_read_uchar(info, start + i);
+}
+
+static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
{
int cfi_offset;
@@ -1440,8 +1443,10 @@ static int __flash_detect_cfi (flash_info_t * info)
if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
&& flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
&& flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
- info->interface = flash_read_ushort (info, 0,
- FLASH_OFFSET_INTERFACE);
+ flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
+ sizeof(struct cfi_qry));
+ info->interface = le16_to_cpu(qry->interface_desc);
+
info->cfi_offset = flash_offset_cfi[cfi_offset];
debug ("device interface is %d\n",
info->interface);
@@ -1478,7 +1483,7 @@ static int __flash_detect_cfi (flash_info_t * info)
return 0;
}
-static int flash_detect_cfi (flash_info_t * info)
+static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
{
debug ("flash detect cfi\n");
@@ -1487,7 +1492,7 @@ static int flash_detect_cfi (flash_info_t * info)
for (info->chipwidth = FLASH_CFI_BY8;
info->chipwidth <= info->portwidth;
info->chipwidth <<= 1)
- if (__flash_detect_cfi(info))
+ if (__flash_detect_cfi(info, qry))
return 1;
}
debug ("not found\n");
@@ -1510,6 +1515,7 @@ ulong flash_get_size (ulong base, int banknum)
int erase_region_size;
int erase_region_count;
int geometry_reversed = 0;
+ struct cfi_qry qry;
info->ext_addr = 0;
info->cfi_version = 0;
@@ -1519,15 +1525,14 @@ ulong flash_get_size (ulong base, int banknum)
info->start[0] = base;
- if (flash_detect_cfi (info)) {
- info->vendor = flash_read_ushort (info, 0,
- FLASH_OFFSET_PRIMARY_VENDOR);
+ if (flash_detect_cfi (info, &qry)) {
+ info->vendor = le16_to_cpu(qry.p_id);
+ info->ext_addr = le16_to_cpu(qry.p_adr);
+ num_erase_regions = qry.num_erase_regions;
+
flash_read_jedec_ids (info);
flash_write_cmd (info, 0, info->cfi_offset, FLASH_CMD_CFI);
- num_erase_regions = flash_read_uchar (info,
- FLASH_OFFSET_NUM_ERASE_REGIONS);
- info->ext_addr = flash_read_ushort (info, 0,
- FLASH_OFFSET_EXT_QUERY_T_P_ADDR);
+
if (info->ext_addr) {
info->cfi_version = (ushort) flash_read_uchar (info,
info->ext_addr + 3) << 8;
@@ -1535,7 +1540,7 @@ ulong flash_get_size (ulong base, int banknum)
info->ext_addr + 4);
}
#ifdef DEBUG
- flash_printqry (info, 0);
+ flash_printqry (&qry);
#endif
switch (info->vendor) {
case CFI_CMDSET_INTEL_STANDARD:
@@ -1591,23 +1596,23 @@ ulong flash_get_size (ulong base, int banknum)
sect_cnt = 0;
sector = base;
for (i = 0; i < num_erase_regions; i++) {
+ unsigned int region = i;
+
if (i > NUM_ERASE_REGIONS) {
printf ("%d erase regions found, only %d used\n",
num_erase_regions, NUM_ERASE_REGIONS);
break;
}
if (geometry_reversed)
- tmp = flash_read_long (info, 0,
- FLASH_OFFSET_ERASE_REGIONS +
- (num_erase_regions - 1 - i) * 4);
- else
- tmp = flash_read_long (info, 0,
- FLASH_OFFSET_ERASE_REGIONS +
- i * 4);
+ region = num_erase_regions - 1 - i;
+
+ tmp = le32_to_cpu(qry.erase_region_info[region]);
+ debug("erase region %u: 0x%08lx\n", region, tmp);
+
+ erase_region_count = (tmp & 0xffff) + 1;
+ tmp >>= 16;
erase_region_size =
(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
- tmp >>= 16;
- erase_region_count = (tmp & 0xffff) + 1;
debug ("erase_region_count = %d erase_region_size = %d\n",
erase_region_count, erase_region_size);
for (j = 0; j < erase_region_count; j++) {
@@ -1640,23 +1645,22 @@ ulong flash_get_size (ulong base, int banknum)
}
info->sector_count = sect_cnt;
- info->size = 1 << flash_read_uchar (info, FLASH_OFFSET_SIZE);
+ info->size = 1 << qry.dev_size;
/* multiply the size by the number of chips */
info->size *= size_ratio;
- info->buffer_size = 1 << flash_read_ushort (info, 0,
- FLASH_OFFSET_BUFFER_SIZE);
- tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
+ info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
+ tmp = 1 << qry.block_erase_timeout_typ;
info->erase_blk_tout = tmp *
- (1 << flash_read_uchar (
- info, FLASH_OFFSET_EMAX_TOUT));
- tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT)) *
- (1 << flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT));
+ (1 << qry.block_erase_timeout_max);
+ tmp = (1 << qry.buf_write_timeout_typ) *
+ (1 << qry.buf_write_timeout_max);
+
/* round up when converting to ms */
- info->buffer_write_tout = tmp / 1000 + (tmp % 1000 ? 1 : 0);
- tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT)) *
- (1 << flash_read_uchar (info, FLASH_OFFSET_WMAX_TOUT));
+ info->buffer_write_tout = (tmp + 999) / 1000;
+ tmp = (1 << qry.word_write_timeout_typ) *
+ (1 << qry.word_write_timeout_max);
/* round up when converting to ms */
- info->write_tout = tmp / 1000 + (tmp % 1000 ? 1 : 0);
+ info->write_tout = (tmp + 999) / 1000;
info->flash_id = FLASH_MAN_CFI;
if ((info->interface == FLASH_CFI_X8X16) &&
(info->chipwidth == FLASH_CFI_BY8)) {
generated by cgit v1.1 at 2024-12-11 11:08:57 +0000