common: spl: move image load to its own function

Refactor spl image load code out of board_init_r and into its own
function. This is a preparation for supporting alternative boot
devices.

Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

common/spl/spl.c

@@ -178,122 +178,105 @@ int spl_init(void)
 	return 0;
 }
 
-void board_init_r(gd_t *dummy1, ulong dummy2)
+static int spl_load_image(u32 boot_device)
 {
-	u32 boot_device;
-
-	debug(">>spl:board_init_r()\n");
-
-#if defined(CONFIG_SYS_SPL_MALLOC_START)
-	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
-			CONFIG_SYS_SPL_MALLOC_SIZE);
-	gd->flags |= GD_FLG_FULL_MALLOC_INIT;
-#endif
-	if (!(gd->flags & GD_FLG_SPL_INIT)) {
-		if (spl_init())
-			hang();
-	}
-#ifndef CONFIG_PPC
-	/*
-	 * timer_init() does not exist on PPC systems. The timer is initialized
-	 * and enabled (decrementer) in interrupt_init() here.
-	 */
-	timer_init();
-#endif
-
-#ifdef CONFIG_SPL_BOARD_INIT
-	spl_board_init();
-#endif
-
-	boot_device = spl_boot_device();
-	debug("boot device - %d\n", boot_device);
 	switch (boot_device) {
 #ifdef CONFIG_SPL_RAM_DEVICE
 	case BOOT_DEVICE_RAM:
-		if (spl_ram_load_image())
-			hang();
-		break;
+		return spl_ram_load_image();
 #endif
 #ifdef CONFIG_SPL_MMC_SUPPORT
 	case BOOT_DEVICE_MMC1:
 	case BOOT_DEVICE_MMC2:
 	case BOOT_DEVICE_MMC2_2:
-		if (spl_mmc_load_image())
-			hang();
-		break;
+		return spl_mmc_load_image();
 #endif
 #ifdef CONFIG_SPL_NAND_SUPPORT
 	case BOOT_DEVICE_NAND:
-		if (spl_nand_load_image())
-			hang();
-		break;
+		return spl_nand_load_image();
 #endif
 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 	case BOOT_DEVICE_ONENAND:
-		if (spl_onenand_load_image())
-			hang();
-		break;
+		return spl_onenand_load_image();
 #endif
 #ifdef CONFIG_SPL_NOR_SUPPORT
 	case BOOT_DEVICE_NOR:
-		if (spl_nor_load_image())
-			hang();
-		break;
+		return spl_nor_load_image();
 #endif
 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 	case BOOT_DEVICE_UART:
-		if (spl_ymodem_load_image())
-			hang();
-		break;
+		return spl_ymodem_load_image();
 #endif
 #ifdef CONFIG_SPL_SPI_SUPPORT
 	case BOOT_DEVICE_SPI:
-		if (spl_spi_load_image())
-			hang();
-		break;
+		return spl_spi_load_image();
 #endif
 #ifdef CONFIG_SPL_ETH_SUPPORT
 	case BOOT_DEVICE_CPGMAC:
 #ifdef CONFIG_SPL_ETH_DEVICE
-		if (spl_net_load_image(CONFIG_SPL_ETH_DEVICE))
-			hang();
+		return spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 #else
-		if (spl_net_load_image(NULL))
-			hang();
+		return spl_net_load_image(NULL);
 #endif
-		break;
 #endif
 #ifdef CONFIG_SPL_USBETH_SUPPORT
 	case BOOT_DEVICE_USBETH:
-		if (spl_net_load_image("usb_ether"))
-			hang();
-		break;
+		return spl_net_load_image("usb_ether");
 #endif
 #ifdef CONFIG_SPL_USB_SUPPORT
 	case BOOT_DEVICE_USB:
-		if (spl_usb_load_image())
-			hang();
-		break;
+		return spl_usb_load_image();
 #endif
 #ifdef CONFIG_SPL_SATA_SUPPORT
 	case BOOT_DEVICE_SATA:
-		if (spl_sata_load_image())
-			hang();
-		break;
+		return spl_sata_load_image();
 #endif
 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 	case BOOT_DEVICE_BOARD:
-		if (spl_board_load_image())
-			hang();
-		break;
+		return spl_board_load_image();
 #endif
 	default:
 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 		puts("SPL: Unsupported Boot Device!\n");
 #endif
-		hang();
+		return -ENODEV;
 	}
 
+	return -EINVAL;
+}
+
+void board_init_r(gd_t *dummy1, ulong dummy2)
+{
+	u32 boot_device;
+
+	debug(">>spl:board_init_r()\n");
+
+#if defined(CONFIG_SYS_SPL_MALLOC_START)
+	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
+			CONFIG_SYS_SPL_MALLOC_SIZE);
+	gd->flags |= GD_FLG_FULL_MALLOC_INIT;
+#endif
+	if (!(gd->flags & GD_FLG_SPL_INIT)) {
+		if (spl_init())
+			hang();
+	}
+#ifndef CONFIG_PPC
+	/*
+	 * timer_init() does not exist on PPC systems. The timer is initialized
+	 * and enabled (decrementer) in interrupt_init() here.
+	 */
+	timer_init();
+#endif
+
+#ifdef CONFIG_SPL_BOARD_INIT
+	spl_board_init();
+#endif
+
+	boot_device = spl_boot_device();
+	debug("boot device - %d\n", boot_device);
+	if (spl_load_image(boot_device))
+		hang();
+
 	switch (spl_image.os) {
 	case IH_OS_U_BOOT:
 		debug("Jumping to U-Boot\n");