GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/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);
+}