Changes between Version 6 and Version 7 of ventana/gw5200usb

Timestamp:

04/24/2020 04:48:11 PM (6 years ago)

Author:

Tim Harvey

Comment:

remove useless devmem register manipulations

ventana/gw5200usb

@@ -15 +15 @@
 Setting the GPIO high will route to the Mini-PCIe slot and setting the GPIO low (0) will route it to the front panel connector:
 {{{#!bash
+# export gpio2 for userspace control and configure as output
 echo 2 > /sys/class/gpio/export #export control of GPIO-2 to user space
 echo out > /sys/class/gpio/gpio2/direction #set to an output
-echo 1 > /sys/class/gpio/gpio2/value #set value high
+# set value low to steer USB OTG to front-panel
+echo 0 > /sys/class/gpio/gpio2/value
+# set value high to steer USB OTG to miniPCIe
+echo 1 > /sys/class/gpio/gpio2/value
 }}}
-
-Additionally, to accomplish this switching back and forth during run time, please use the script below:
-{{{#!bash
-#!/bin/sh
-#
-# GW52xx:
-#  Dynamically switch USB OTG from front-panel (fp) and PCIe socket (pci)
-#  at run-time and trigger re-enumeration
-#
-# usage: gw52xx-usbswitch fp|pci
-#
-[ -d /sys/class/gpio/gpio2 ] || {
-  echo "setup"
-  devmem 0x20e0224 32 0x15 # hack to set SION bit in case we want read-back
-  echo 2 > /sys/class/gpio/export
-  echo out > /sys/class/gpio/gpio2/direction
-}
-case "$1" in
-  fp)  echo 0 > /sys/class/gpio/gpio2/value;;
-  pci) echo 1 > /sys/class/gpio/gpio2/value;;
-esac
-# set GPIO_2 pad-mux to GPIO1__IO2 to effectively let OTG_ID go interally go
-# high and trigger a mode-switch to client-mode and thus disconnect
-devmem 0x20e0210 32 0x5
-# set GPIO_2 pad-mux back to USBOTG_IDSEL to let OTG_ID get pulled down by
-# attached cable and trigger a mode-switch to host-mode and thus enumerate
-devmem 0x20e0210 32 0x3
-}}}