recipes-support: usb-suspend-resume: Add USB suspend resume fix for Vybrid

Add systemd service which utilises systemd's suspend resume hooks
to excute scripts which take care of unbinding and binding the
necessary configurations and usb driver during suspend and resume
respectively.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>

5 files changed, 70 insertions, 0 deletions

diff --git a/recipes-support/usb-suspend-resume/files/usb-resume.service b/recipes-support/usb-suspend-resume/files/usb-resume.service
new file mode 100644
index 0000000..3bd9713
--- /dev/null
+++ b/recipes-support/usb-suspend-resume/files/usb-resume.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=User resume actions
+After=suspend.target
+
+[Service]
+Type=simple
+ExecStart=-/usr/bin/usb-resume.sh
+
+[Install]
+WantedBy=suspend.target
diff --git a/recipes-support/usb-suspend-resume/files/usb-resume.sh b/recipes-support/usb-suspend-resume/files/usb-resume.sh
new file mode 100644
index 0000000..2584813
--- /dev/null
+++ b/recipes-support/usb-suspend-resume/files/usb-resume.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+echo ci_hdrc.1 > /sys/bus/platform/drivers/ci_hdrc/unbind
+echo ci_hdrc.1 > /sys/bus/platform/drivers/ci_hdrc/bind
+echo ci_hdrc.0 > /sys/bus/platform/drivers/ci_hdrc/unbind
+echo ci_hdrc.0 > /sys/bus/platform/drivers/ci_hdrc/bind
+/bin/sh -c '/bin/cat /proc/device-tree/model > \
+                                   /sys/kernel/config/usb_gadget/g1/strings/0x409/product'
+/bin/sh -c '/bin/cat /proc/device-tree/serial-number > \
+                                   /sys/kernel/config/usb_gadget/g1/strings/0x409/serialnumber'
+/bin/sh -c '/bin/echo `ls /sys/class/udc/` > \
+                                    /sys/kernel/config/usb_gadget/g1/UDC'
diff --git a/recipes-support/usb-suspend-resume/files/usb-suspend.service b/recipes-support/usb-suspend-resume/files/usb-suspend.service
new file mode 100644
index 0000000..e56630d
--- /dev/null
+++ b/recipes-support/usb-suspend-resume/files/usb-suspend.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=User suspend actions
+Before=sleep.target
+
+[Service]
+Type=simple
+ExecStart=-/usr/bin/usb-suspend.sh
+
+[Install]
+WantedBy=sleep.target
diff --git a/recipes-support/usb-suspend-resume/files/usb-suspend.sh b/recipes-support/usb-suspend-resume/files/usb-suspend.sh
new file mode 100644
index 0000000..4a2df84
--- /dev/null
+++ b/recipes-support/usb-suspend-resume/files/usb-suspend.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+echo "" > /sys/kernel/config/usb_gadget/g1/UDC
diff --git a/recipes-support/usb-suspend-resume/usb-suspend-resume.bb b/recipes-support/usb-suspend-resume/usb-suspend-resume.bb
new file mode 100644
index 0000000..d555b79
--- /dev/null
+++ b/recipes-support/usb-suspend-resume/usb-suspend-resume.bb
@@ -0,0 +1,37 @@
+SECTION = "USB"
+SUMMARY = "Fix for USB suspend resume on Vybrid"
+RDEPENDS_${PN} = ""
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=4d92cd373abda3937c2bc47fbc49d690"
+
+PR = "r1"
+
+inherit allarch systemd
+
+SRC_URI = " \
+    file://usb-suspend.sh \
+    file://usb-resume.sh \
+    file://usb-suspend.service \
+    file://usb-resume.service \
+"
+
+do_install() {
+    install -d ${D}/${bindir}
+    install -m 0755 ${WORKDIR}/usb-suspend.sh ${D}/${bindir}/
+    install -m 0755 ${WORKDIR}/usb-resume.sh ${D}/${bindir}/
+
+    install -d ${D}${systemd_unitdir}/system/
+    install -m 0644 ${WORKDIR}/usb-suspend.service ${D}${systemd_unitdir}/system
+    install -m 0644 ${WORKDIR}/usb-resume.service ${D}${systemd_unitdir}/system
+}
+
+FILES_${PN} += " \
+    ${systemd_unitdir}/system \
+"
+
+NATIVE_SYSTEMD_SUPPORT = "1"
+SYSTEMD_PACKAGES = "${PN}"
+SYSTEMD_SERVICE_${PN} = "usb-suspend.service usb-resume.service"
+SYSTEMD_AUTO_ENABLE_mx6 = "disable"
+SYSTEMD_AUTO_ENABLE_t30 = "disable"
+SYSTEMD_AUTO_ENABLE_t20 = "disable"