Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / mtd / spi / sf.c

diff --git a/qemu/roms/u-boot/drivers/mtd/spi/sf.c b/qemu/roms/u-boot/drivers/mtd/spi/sf.c
new file mode 100644 (file)
index 0000000..664e860
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/mtd/spi/sf.c
@@ -0,0 +1,58 @@
+/*
+ * SPI flash interface
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <spi.h>
+
+static int spi_flash_read_write(struct spi_slave *spi,
+                               const u8 *cmd, size_t cmd_len,
+                               const u8 *data_out, u8 *data_in,
+                               size_t data_len)
+{
+       unsigned long flags = SPI_XFER_BEGIN;
+       int ret;
+
+#ifdef CONFIG_SF_DUAL_FLASH
+       if (spi->flags & SPI_XFER_U_PAGE)
+               flags |= SPI_XFER_U_PAGE;
+#endif
+       if (data_len == 0)
+               flags |= SPI_XFER_END;
+
+       ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
+       if (ret) {
+               debug("SF: Failed to send command (%zu bytes): %d\n",
+                     cmd_len, ret);
+       } else if (data_len != 0) {
+               ret = spi_xfer(spi, data_len * 8, data_out, data_in,
+                                       SPI_XFER_END);
+               if (ret)
+                       debug("SF: Failed to transfer %zu bytes of data: %d\n",
+                             data_len, ret);
+       }
+
+       return ret;
+}
+
+int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
+               size_t cmd_len, void *data, size_t data_len)
+{
+       return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
+}
+
+int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
+{
+       return spi_flash_cmd_read(spi, &cmd, 1, response, len);
+}
+
+int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
+               const void *data, size_t data_len)
+{
+       return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
+}