Changes between Version 1 and Version 2 of ventana/bootloader

Timestamp:

01/18/2018 11:09:40 PM (6 years ago)

Author:

Bobby Jones

Comment:

Added information regarding enabling pci in the bootloader

ventana/bootloader

@@ -383 +383 @@
 || mtdids    || MTD device ||
 || mtdparts  || MTD partitions for mtd device (merged into device-tree) ||
+|| pcidisable || Setting to '1' will disable pci until booting to Linux ||
 || quiet     || if set to '1' will quiet down some of the bootloader output ||
 || sata_boot || Ventana boot script for booting from SATA device ||
@@ -589 +590 @@
 '''This feature is available in Gateworks U-Boot 2015.04'''
 
+[=#enablepci]
+== Enabling PCI ==
+To avoid PCI and PCIe related issues in Linux, the default bootloader behavior is to disable all pci until booting to Linux. In order to use any pci or pcie devices while in the bootloader, the {{{pcidisable}}} environment variable must be cleared.
+
+{{{
+setenv pcidisable; saveenv; reset
+}}}
+
+Once cleared and after board reset, pci devices should enumerate as expected. 
+
+You can further interact with the pci subsystem via the {{{pci}}} command in the bootloader.
 
 [=#hwconfig]
@@ -745 +757 @@
 The Ventana U-Boot has support for the following network devices:
  * IMX6 FEC (eth0 on most Ventana boards)
- * Intel i210 (eth0 and eth1 on GW5520)
+ * Intel i210 (eth0 and eth1 on GW5520: must [#pcinet enable pci] to use in the bootloader)
  * IMX6 USB OTG network gadget - usbnet (network connection between Ventana USB OTG port and host PC)
  * USB Network devices (ASIX AX8817X, SMSC LAN95xx)
@@ -761 +773 @@
  * {{{tftptimeout}}} - retransmission timeout for TFTP packets in ms (min value is 1000, default is 5000)
 
+
+[=#pcinet]
+=== PCIe Network Devices ===
+To use a network device relying on PCIe (i210, sky2, etc) in the bootloader, you must clear the {{{pcidisable}}} environment variable and reset.
+{{{
+setenv pcidisable; saveenv; reset
+}}}
+
+See the above [#enablepci enabling pci] section for more information.
 
 [=#usbnet]