drivers/mtd/spi/spi_spl_load.c

   1 /*
   2  * Copyright (C) 2011 OMICRON electronics GmbH
   3  *
   4  * based on drivers/mtd/nand/nand_spl_load.c
   5  *
   6  * Copyright (C) 2011
   7  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <common.h>
  13 #include <spi_flash.h>
  14 #include <spl.h>
  15
  16 /*
  17  * The main entry for SPI booting. It's necessary that SDRAM is already
  18  * configured and available since this code loads the main U-Boot image
  19  * from SPI into SDRAM and starts it from there.
  20  */
  21 void spl_spi_load_image(void)
  22 {
  23         struct spi_flash *flash;
  24         struct image_header *header;
  25
  26         /*
  27          * Load U-Boot image from SPI flash into RAM
  28          */
  29
  30         flash = spi_flash_probe(CONFIG_SPL_SPI_BUS, CONFIG_SPL_SPI_CS,
  31                                 CONFIG_SF_DEFAULT_SPEED, SPI_MODE_3);
  32         if (!flash) {
  33                 puts("SPI probe failed.\n");
  34                 hang();
  35         }
  36
  37         /* use CONFIG_SYS_TEXT_BASE as temporary storage area */
  38         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  39
  40         /* Load u-boot, mkimage header is 64 bytes. */
  41         spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
  42                        (void *)header);
  43         spl_parse_image_header(header);
  44         spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
  45                        spl_image.size, (void *)spl_image.load_addr);
  46 }