spi: Prepare for multi i/o and dummy bytes
Multi-i/o commands split SPI transactions into multiple phases that
can be transferred over 1, 2 or 4 wires. For this, we adapt `struct
spi_command` with a new enum, specifying the transfer mode, and ad-
ditional size fields. While we are at it, move everything related
into a new header file `spi_command.h` so we won't further clutter
`flash.h`.
On the master side, we add respective feature flags for the multi-
i/o modes.
See also the comment in `spi_command.h` about multi-i/o commands.
Change-Id: I79debb845f1c8fec77e0556853ffb01735e73ab8
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/44
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/spi25_statusreg.c b/spi25_statusreg.c
index 508ee5d..b363b5f 100644
--- a/spi25_statusreg.c
+++ b/spi25_statusreg.c
@@ -19,6 +19,7 @@
#include "flash.h"
#include "chipdrivers.h"
+#include "spi_command.h"
#include "spi.h"
/* === Generic functions === */
@@ -138,21 +139,15 @@
struct spi_command cmds[] = {
{
- .writecnt = JEDEC_WREN_OUTSIZE,
+ .opcode_len = JEDEC_WREN_OUTSIZE,
.writearr = &enable_cmd,
- .readcnt = 0,
- .readarr = NULL,
}, {
- .writecnt = write_cmd_len,
+ .opcode_len = 1,
+ .write_len = write_cmd_len - 1,
.writearr = write_cmd,
- .readcnt = 0,
- .readarr = NULL,
- }, {
- .writecnt = 0,
- .writearr = NULL,
- .readcnt = 0,
- .readarr = NULL,
- }};
+ },
+ NULL_SPI_CMD
+ };
int result = spi_send_multicommand(flash, cmds);
if (result) {