omap-common: SYS_BOOT fallback logic correction and support for more devices

The SYS_BOOT-based fallback shouldn't only check for one of the conditions of
use and then let the switch/case handle each boot device without enforcing the
conditions for each type of boot device again.

For instance, this behaviour would trigger the fallback for UART when
BOOT_DEVICE_UART is defined, CONFIG_SPL_YMODEM_SUPPORT is enabled (which should
be a show-stopper) and e.g. BOOT_DEVICE_USB is enabled and not
CONFIG_SPL_USB_SUPPORT.
Separating the logic for USB and UART solves this.

In addition, this adds support for more peripheral devices (USBETH and CPGMAC)
to the fallback mechanism. Note that the USBETH boot device should always be
different from the USB boot device (each should match a different bootrom
handoff case).

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Hannes Schmelzer <oe5hpm@oevsv.at>
Tested-by: Hannes Schmelzer <oe5hpm@oevsv.at>

arch/arm/cpu/armv7/omap-common/boot-common.c

@@ -30,6 +30,7 @@ void save_omap_boot_params(void)
 {
 	u32 boot_params = *((u32 *)OMAP_SRAM_SCRATCH_BOOT_PARAMS);
 	struct omap_boot_parameters *omap_boot_params;
+	int sys_boot_device = 0;
 	u32 boot_device;
 	u32 boot_mode;
 
@@ -64,31 +65,42 @@ void save_omap_boot_params(void)
 	if (boot_device == BOOT_DEVICE_QSPI_4)
 		boot_device = BOOT_DEVICE_SPI;
 #endif
-#if (defined(BOOT_DEVICE_UART) && !defined(CONFIG_SPL_YMODEM_SUPPORT)) || \
-    (defined(BOOT_DEVICE_USB) && !defined(CONFIG_SPL_USB_SUPPORT)) || \
-    (defined(BOOT_DEVICE_USBETH) && !defined(CONFIG_SPL_USBETH_SUPPORT))
 	/*
 	 * When booting from peripheral booting, the boot device is not usable
 	 * as-is (unless there is support for it), so the boot device is instead
 	 * figured out using the SYS_BOOT pins.
 	 */
 	switch (boot_device) {
-#ifdef BOOT_DEVICE_UART
-	case BOOT_DEVICE_UART:
+#if defined(BOOT_DEVICE_UART) && !defined(CONFIG_SPL_YMODEM_SUPPORT)
+		case BOOT_DEVICE_UART:
+			sys_boot_device = 1;
+			break;
+#endif
+#if defined(BOOT_DEVICE_USB) && !defined(CONFIG_SPL_USB_SUPPORT)
+		case BOOT_DEVICE_USB:
+			sys_boot_device = 1;
+			break;
 #endif
-#ifdef BOOT_DEVICE_USB
-	case BOOT_DEVICE_USB:
+#if defined(BOOT_DEVICE_USBETH) && !defined(CONFIG_SPL_USBETH_SUPPORT)
+		case BOOT_DEVICE_USBETH:
+			sys_boot_device = 1;
+			break;
+#endif
+#if defined(BOOT_DEVICE_CPGMAC) && !defined(CONFIG_SPL_ETH_SUPPORT)
+		case BOOT_DEVICE_CPGMAC:
+			sys_boot_device = 1;
+			break;
 #endif
+	}
+
+	if (sys_boot_device) {
 		boot_device = omap_sys_boot_device();
 
 		/* MMC raw mode will fallback to FS mode. */
 		if ((boot_device >= MMC_BOOT_DEVICES_START) &&
 		    (boot_device <= MMC_BOOT_DEVICES_END))
 			boot_mode = MMCSD_MODE_RAW;
-
-		break;
 	}
-#endif
 
 	gd->arch.omap_boot_device = boot_device;