@@ -281,6 +281,32 @@ static void stfsm_wait_seq(struct stfsm *fsm)
dev_err(fsm->dev, "timeout on sequence completion\n");
}
+static void stfsm_read_fifo(struct stfsm *fsm, uint32_t *buf,
+ const uint32_t size)
+{
+ uint32_t remaining = size >> 2;
+ uint32_t avail;
+ uint32_t words;
+
+ dev_dbg(fsm->dev, "Reading %d bytes from FIFO\n", size);
+
+ BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3));
+
+ while (remaining) {
+ for (;;) {
+ avail = stfsm_fifo_available(fsm);
+ if (avail)
+ break;
+ udelay(1);
+ }
+ words = min(avail, remaining);
+ remaining -= words;
+
+ readsl(fsm->base + SPI_FAST_SEQ_DATA_REG, buf, words);
+ buf += words;
+ }
+}
+
static int stfsm_set_mode(struct stfsm *fsm, uint32_t mode)
{
int ret, timeout = 10;
When invoked the driver will attempt to read any available data from the FSM's data register. Any data collected from this FIFO would have originated from the flash chip. Acked-by Angus Clark <angus.clark@st.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/mtd/devices/st_spi_fsm.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)