Add support for continuous read out of the RDSR and READ_FSR status registers until the chip select is deasserted. This feature is supported by amongst others 1 or more flashtypes manufactured by Numonyx (Micron), Windbond, SST, Gigadevice, Eon and Macronix.
Signed-off-by: Francisco Iglesias <[email protected]> --- hw/block/m25p80.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index a2438b9..721ae1a 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -423,6 +423,7 @@ typedef struct Flash { uint8_t data[M25P80_INTERNAL_DATA_BUFFER_SZ]; uint32_t len; uint32_t pos; + bool data_read_loop; uint8_t needed_bytes; uint8_t cmd_in_progress; uint32_t cur_addr; @@ -983,6 +984,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; s->len = 1; + s->data_read_loop = true; s->state = STATE_READING_DATA; break; @@ -993,6 +995,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; s->len = 1; + s->data_read_loop = true; s->state = STATE_READING_DATA; break; @@ -1133,6 +1136,7 @@ static int m25p80_cs(SSISlave *ss, bool select) s->pos = 0; s->state = STATE_IDLE; flash_sync_dirty(s, -1); + s->data_read_loop = false; } DB_PRINT_L(0, "%sselect\n", select ? "de" : ""); @@ -1198,7 +1202,9 @@ static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t tx) s->pos++; if (s->pos == s->len) { s->pos = 0; - s->state = STATE_IDLE; + if (!s->data_read_loop) { + s->state = STATE_IDLE; + } } break; @@ -1279,6 +1285,7 @@ static const VMStateDescription vmstate_m25p80 = { VMSTATE_UINT8_ARRAY(data, Flash, M25P80_INTERNAL_DATA_BUFFER_SZ), VMSTATE_UINT32(len, Flash), VMSTATE_UINT32(pos, Flash), + VMSTATE_BOOL(data_read_loop, Flash), VMSTATE_UINT8(needed_bytes, Flash), VMSTATE_UINT8(cmd_in_progress, Flash), VMSTATE_UINT32(cur_addr, Flash), -- 2.9.3
