int
sflash_write(si_t *sih, chipcregs_t *cc, uint offset, uint length, const uchar *buffer)
{
struct sflash *sfl;
uint off = offset, len = length;
const uint8 *buf = buffer;
uint8 data;
int ret = 0, ntry = 0;
bool is4712b0;
uint32 page, byte, mask;
osl_t *osh;
ASSERT(sih);
osh = si_osh(sih);
if (!len)
return 0;
sfl = &sflash;
if ((off + len) > sfl->size)
return -22;
switch (sfl->type) {
case SFLASH_ST:
is4712b0 = (CHIPID(sih->chip) == BCM4712_CHIP_ID) && (CHIPREV(sih->chiprev) == 3);
/* Enable writes */
retry: sflash_cmd(osh, cc, SFLASH_ST_WREN);
off = offset;
len = length;
buf = buffer;
ntry++;
if (is4712b0) {
mask = 1 << 14;
W_REG(osh, &cc->flashaddress, off);
data = GET_BYTE(buf);
buf++;
W_REG(osh, &cc->flashdata, data);
/* Set chip select */
OR_REG(osh, &cc->gpioout, mask);
/* Issue a page program with the first byte */
sflash_cmd(osh, cc, SFLASH_ST_PP);
ret = 1;
off++;
len--;
while (len > 0) {
if ((off & 255) == 0) {
/* Page boundary, drop cs and return */
AND_REG(osh, &cc->gpioout, ~mask);
OSL_DELAY(1);
if (!sflash_poll(sih, cc, off)) {
/* Flash rejected command */
if (ntry <= ST_RETRIES)
goto retry;
else
return -11;
}
return ret;
} else {
/* Write single byte */
data = GET_BYTE(buf);
buf++;
sflash_cmd(osh, cc, data);
}
ret++;
off++;
len--;
}
/* All done, drop cs */
AND_REG(osh, &cc->gpioout, ~mask);
OSL_DELAY(1);
if (!sflash_poll(sih, cc, off)) {
/* Flash rejected command */
if (ntry <= ST_RETRIES)
goto retry;
else
return -12;
}
} else if (sih->ccrev >= 20) {
W_REG(osh, &cc->flashaddress, off);
data = GET_BYTE(buf);
buf++;
W_REG(osh, &cc->flashdata, data);
/* Issue a page program with CSA bit set */
sflash_cmd(osh, cc, SFLASH_ST_CSA | SFLASH_ST_PP);
ret = 1;
off++;
len--;
while (len > 0) {
if ((off & 255) == 0) {
/* Page boundary, poll droping cs and return */
W_REG(NULL, &cc->flashcontrol, 0);
OSL_DELAY(1);
if (sflash_poll(sih, cc, off) == 0) {
/* Flash rejected command */
SFL_MSG(("sflash: pp rejected, ntry: %d,"
" off: %d/%d, len: %d/%d, ret:"
"%d\n", ntry, off, offset, len,
length, ret));
if (ntry <= ST_RETRIES)
goto retry;
else
return -11;
}
return ret;
} else {
/* Write single byte */
data = GET_BYTE(buf);
buf++;
sflash_cmd(osh, cc, SFLASH_ST_CSA | data);
}
ret++;
off++;
len--;
}
/* All done, drop cs & poll */
W_REG(NULL, &cc->flashcontrol, 0);
OSL_DELAY(1);
if (sflash_poll(sih, cc, off) == 0) {
/* Flash rejected command */
SFL_MSG(("sflash: pp rejected, ntry: %d, off: %d/%d,"
" len: %d/%d, ret: %d\n",
ntry, off, offset, len, length, ret));
if (ntry <= ST_RETRIES)
goto retry;
else
return -12;
}
} else {
ret = 1;
W_REG(osh, &cc->flashaddress, off);
data = GET_BYTE(buf);
buf++;
W_REG(osh, &cc->flashdata, data);
/* Page program */
sflash_cmd(osh, cc, SFLASH_ST_PP);
}
break;
case SFLASH_AT:
mask = sfl->blocksize - 1;
page = (off & ~mask) << 1;
byte = off & mask;
/* Read main memory page into buffer 1 */
if (byte || (len < sfl->blocksize)) {
W_REG(osh, &cc->flashaddress, page);
sflash_cmd(osh, cc, SFLASH_AT_BUF1_LOAD);
/* 250 us for AT45DB321B */
SPINWAIT(sflash_poll(sih, cc, off), 1000);
ASSERT(!sflash_poll(sih, cc, off));
}
/* Write into buffer 1 */
for (ret = 0; (ret < (int)len) && (byte < sfl->blocksize); ret++) {
W_REG(osh, &cc->flashaddress, byte++);
W_REG(osh, &cc->flashdata, *buf++);
sflash_cmd(osh, cc, SFLASH_AT_BUF1_WRITE);
}
/* Write buffer 1 into main memory page */
W_REG(osh, &cc->flashaddress, page);
sflash_cmd(osh, cc, SFLASH_AT_BUF1_PROGRAM);
break;
}
return ret;
}
int
sflash_write(si_t *sih, chipcregs_t *cc, uint offset, uint length, const uchar *buffer)
{
struct sflash *sfl;
uint off = offset, len = length;
#if SFLASH_ST_PAGE_MODE_WRITE
int tryn = 0;
#else /* !SFLASH_ST_PAGE_MODE_WRITE */
uint quot = 0, remain = 0, wlen = 0;
uint32 reg_val = 0;
#endif /* SFLASH_ST_PAGE_MODE_WRITE */
const uchar *buf = buffer;
int ret = 0;
uint32 page, byte, mask;
osl_t *osh;
ASSERT(sih);
osh = si_osh(sih);
if (!len)
return 0;
sfl = &sflash;
if ((off + len) > sfl->size)
return -22;
switch (sfl->type) {
case SFLASH_ST:
#if SFLASH_ST_PAGE_MODE_WRITE
/* Enable writes */
retry: sflash_cmd(osh, cc, SFLASH_ST_WREN);
off = offset;
len = length;
buf = buffer;
tryn++;
if (sih->ccrev >= 20) {
W_REG(osh, &cc->sflashaddress, off);
W_REG(osh, &cc->sflashdata, *buf++);
/* Issue a page program with CSA bit set */
sflash_cmd(osh, cc, SFLASH_ST_CSA | SFLASH_ST_PP);
ret = 1;
off++;
len--;
while (len > 0) {
if ((off & 255) == 0) {
/* Page boundary, poll droping cs and return */
W_REG(osh, &cc->sflashcontrol, 0);
OSL_DELAY(1);
if (sflash_poll(sih, cc, offset) != 0) {
/* Flash rejected command */
SFL_MSG(("sflash: pp rejected, tryn: %d,"
" off: %d/%d, len: %d/%d, ret:"
"%d\n", tryn, off, offset, len,
length, ret));
if (tryn <= ST_RETRIES)
goto retry;
else
return -11;
}
return ret;
} else {
/* Write single byte */
sflash_cmd(osh, cc, SFLASH_ST_CSA | *buf++);
}
ret++;
off++;
len--;
}
/* All done, drop cs & poll */
W_REG(osh, &cc->sflashcontrol, 0);
OSL_DELAY(1);
if (sflash_poll(sih, cc, offset) != 0) {
/* Flash rejected command */
SFL_MSG(("sflash: pp rejected, tryn: %d, off: %d/%d,"
" len: %d/%d, ret: %d\n",
tryn, off, offset, len, length, ret));
if (tryn <= ST_RETRIES)
goto retry;
else
return -12;
}
} else {
ret = 1;
W_REG(osh, &cc->sflashaddress, off);
W_REG(osh, &cc->sflashdata, *buf);
/* Page program */
sflash_cmd(osh, cc, SFLASH_ST_PP);
}
#else /* !SFLASH_ST_PAGE_MODE_WRITE */
off = offset;
len = length;
buf = buffer;
if (sih->ccrev >= 20) {
ret = 0;
while (len > 0) {
/* Enable writes */
sflash_cmd(osh, cc, SFLASH_ST_WREN);
/* Drop cs before starting a page program */
W_REG(osh, &cc->sflashcontrol, 0);
W_REG(osh, &cc->sflashaddress, off);
quot = (len / 4);
remain = (len % 4);
if (quot != 0) { /* len >= 4 bytes */
wlen = 4;
reg_val = (*buf << 24);
buf++;
reg_val |= (*buf << 16);
buf++;
reg_val |= (*buf << 8);
buf++;
reg_val |= (*buf);
buf++;
W_REG(osh, &cc->sflashdata, reg_val);
/* Issue a page program with CSA bit set : opcode+3 addres & 4 data bytes */
sflash_cmd(osh, cc, (SFLASH_ST_CSA | SFLASH_ST_PP3A4D));
} else { /* len < 4 bytes */
wlen = 1;
W_REG(osh, &cc->sflashdata, *buf++);
/* Issue a page program with CSA bit set : opcode+3 addres & 1 data bytes */
sflash_cmd(osh, cc, (SFLASH_ST_CSA | SFLASH_ST_PP));
}
ret += wlen;
off += wlen;
len -= wlen;
/* A page program done(1 or 4 data bytes), drop cs & poll */
W_REG(osh, &cc->sflashcontrol, 0);
while (sflash_poll(sih, cc, offset) != 0) {
/* Poll until command completion */
}
/* Page boundary and return for 256 bytes write */
if ((off & 255) == 0) {
return ret;
}
}
} else {
/* Enable writes */
sflash_cmd(osh, cc, SFLASH_ST_WREN);
ret = 1;
W_REG(osh, &cc->sflashaddress, off);
W_REG(osh, &cc->sflashdata, *buf);
/* Page program */
sflash_cmd(osh, cc, SFLASH_ST_PP);
}
#endif /* SFLASH_ST_PAGE_MODE_WRITE */
break;
case SFLASH_AT:
mask = sfl->blocksize - 1;
page = (off & ~mask) << 1;
byte = off & mask;
/* Read main memory page into buffer 1 */
if (byte || (len < sfl->blocksize)) {
W_REG(osh, &cc->sflashaddress, page);
sflash_cmd(osh, cc, SFLASH_AT_BUF1_LOAD);
/* 250 us for AT45DB321B */
SPINWAIT(sflash_poll(sih, cc, offset), 1000);
ASSERT(!sflash_poll(sih, cc, offset));
}
/* Write into buffer 1 */
for (ret = 0; (ret < (int)len) && (byte < sfl->blocksize); ret++) {
W_REG(osh, &cc->sflashaddress, byte++);
W_REG(osh, &cc->sflashdata, *buf++);
sflash_cmd(osh, cc, SFLASH_AT_BUF1_WRITE);
}
/* Write buffer 1 into main memory page */
W_REG(osh, &cc->sflashaddress, page);
sflash_cmd(osh, cc, SFLASH_AT_BUF1_PROGRAM);
break;
}
return ret;
}
