drivers: Add SPI Nor flash support
Add SPI Nor flash support
Change-Id: I0cde3fdb4dcad5bcaf445b3bb48e279332bd28af
Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com>
diff --git a/drivers/brcm/spi_sf.c b/drivers/brcm/spi_sf.c
new file mode 100644
index 0000000..8bbb09f
--- /dev/null
+++ b/drivers/brcm/spi_sf.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2019-2020, Broadcom
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/debug.h>
+
+#include <spi.h>
+
+#define BITS_PER_BYTE 8
+#define CMD_LEN1 1
+
+static int spi_flash_read_write(const uint8_t *cmd,
+ size_t cmd_len,
+ const uint8_t *data_out,
+ uint8_t *data_in,
+ size_t data_len)
+{
+ unsigned long flags = SPI_XFER_BEGIN;
+ int ret;
+
+ if (data_len == 0)
+ flags |= SPI_XFER_END;
+
+ ret = spi_xfer(cmd_len * BITS_PER_BYTE, cmd, NULL, flags);
+ if (ret) {
+ ERROR("SF: Failed to send command (%zu bytes): %d\n",
+ cmd_len, ret);
+ } else if (data_len != 0) {
+ ret = spi_xfer(data_len * BITS_PER_BYTE, data_out,
+ data_in, SPI_XFER_END);
+ if (ret)
+ ERROR("SF: Failed to transfer %zu bytes of data: %d\n",
+ data_len, ret);
+ }
+
+ return ret;
+}
+
+int spi_flash_cmd_read(const uint8_t *cmd,
+ size_t cmd_len,
+ void *data,
+ size_t data_len)
+{
+ return spi_flash_read_write(cmd, cmd_len, NULL, data, data_len);
+}
+
+int spi_flash_cmd(uint8_t cmd, void *response, size_t len)
+{
+ return spi_flash_cmd_read(&cmd, CMD_LEN1, response, len);
+}
+
+int spi_flash_cmd_write(const uint8_t *cmd,
+ size_t cmd_len,
+ const void *data,
+ size_t data_len)
+{
+ return spi_flash_read_write(cmd, cmd_len, data, NULL, data_len);
+}