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hw/pflash: fix block write start

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Move the pflash_blk_write_start() call.  We need the offset of the
first data write, not the offset for the setup (number-of-bytes)
write.  Without this fix u-boot can do block writes to the first
flash block only.

While being at it drop a leftover FIXME.

Cc: qemu-stable@nongnu.org
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2343
Fixes: 284a7ee2e2 ("hw/pflash: implement update buffer for block writes")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240516121237.534875-1-kraxel@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
(cherry picked from commit 2563be6317)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Gerd Hoffmann 2024-05-16 14:12:37 +02:00 • committed by Michael Tokarev
parent 2965ecc487
commit 2569dec929
1 changed files with 3 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

8
hw/block/pflash_cfi01.c
View file

@ -518,10 +518,6 @@ static void pflash_write(PFlashCFI01 *pfl, hwaddr offset,
break; break;
case 0xe8: /* Write to buffer */ case 0xe8: /* Write to buffer */
trace_pflash_write(pfl->name, "write to buffer"); trace_pflash_write(pfl->name, "write to buffer");
/* FIXME should save @offset, @width for case 1+ */
qemu_log_mask(LOG_UNIMP,
"%s: Write to buffer emulation is flawed\n",
__func__);
pfl->status |= 0x80; /* Ready! */ pfl->status |= 0x80; /* Ready! */
break; break;
case 0xf0: /* Probe for AMD flash */ case 0xf0: /* Probe for AMD flash */
@ -574,7 +570,6 @@ static void pflash_write(PFlashCFI01 *pfl, hwaddr offset,
} }
pfl->counter = value; pfl->counter = value;
pfl->wcycle++; pfl->wcycle++;
pflash_blk_write_start(pfl, offset);
break; break;
case 0x60: case 0x60:
if (cmd == 0xd0) { if (cmd == 0xd0) {
@ -605,6 +600,9 @@ static void pflash_write(PFlashCFI01 *pfl, hwaddr offset,
switch (pfl->cmd) { switch (pfl->cmd) {
case 0xe8: /* Block write */ case 0xe8: /* Block write */
/* FIXME check @offset, @width */ /* FIXME check @offset, @width */
if (pfl->blk_offset == -1 && pfl->counter) {
pflash_blk_write_start(pfl, offset);
}
if (!pfl->ro && (pfl->blk_offset != -1)) { if (!pfl->ro && (pfl->blk_offset != -1)) {
pflash_data_write(pfl, offset, value, width, be); pflash_data_write(pfl, offset, value, width, be);
} else { } else {