ks (short for kickstart) is a utility which uses sahara to load images
from the host to a device. This is intended for "flashless boot"
devices like the Qualcomm Cloud AI 100 which rely on obtaining the
runtime firmware from the host instead of storing it on device.
While ks uses sahara, like qdl, it is different enough that a separate
utility is justified. ks does not need USB support, instead opting for
simple open()/read()/write() operations. ks does not need firehose.
The set of program arguments that ks needs is vastly different than the
set that qdl supports.
This initial implementation of ks defines two arguments. Both are
required, but the image specifier argument can be specified more than
one.
A sample invocation -
ks -p /dev/mhi0_QAIC_SAHARA -s 1:/opt/qti-aic/firmware/fw1.bin -s 2:/opt/qti-aic/firmware/fw2.bin
In this example, ks is instructed to use the /dev/mhi0_QAIC_SAHARA
device node file as the "port" which the device is using for the sahara
protocol. /opt/qti-aic/firmware/fw1.bin is mapped to id 1, and
/opt/qti-aic/firmware/fw2.bin is mapped to id 2. If the device requests
image id 1, ks will attempt to open and read
/opt/qti-aic/firmware/fw1.bin to send to the device. Note that
/opt/qti-aic/firmware/fw1.bin does not need to exist on the filesystem.
If ks cannot access the file (perhaps because it does not exist), then
the device will determine the next action. This is useful for setting
up a single command in a udev rule that can handle multiple
configurations, such as an optional DDR training process.
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Per user request, use pkg-config instead of xml2-config when generating
cflags and ldflags.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
On some newer platforms the device ignore the configure request to
disable ZLP, causing the Firehose program request to stall, when the
device is waiting for a ZLP to end a transfer.
Mitigate this by circumventing the qcserial driver and drive the USB
traffic directly using USBFS. The tool will attempt to detach qcserial
from the device, in case it's already attached, so no changes are needed
in the kernel or system configuration.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
