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path: root/drivers/usb/gadget/pxa27x_udc.h
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2009-06-15USB: pxa27x_udc: single-thread setup requestsRobert Jarzmik
Since the PXA 27x UDC automatically ACK's some control packets such as SET_INTERFACE, the gadgets may not get a chance to process the request before another control packet is received. The Linux gadgets do not expect to receive setup callbacks out of order. The file storage gadget only saves the "highest" priority request. The PXA27x UDC driver must make sure it only sends one up at a time, allowing the gadget to make changes before continuing. In theory, the host would be NACK'd while the gadget processes the change but the UDC has already ACK'd the request. If another request is sent by the host that is not automatically ACK'd by the UDC, then the throttling happens properly to regain sync. The observed case was the file_storage gadget timing out on a BulkReset request because the SET_INTERFACE was being processed by the gadget. Since SET_INTERFACE is higher priority than BulkReset, the BulkReset was dropped. This was exacerbated by turning on the debug which delayed the fsg signal processing thread. This also fixes the "should never get in WAIT_ACK_SET_CONF_INTERF state here!!!" warning. Reported-by: Vernon Sauder <vernoninhand@gmail.com> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> index 51790b0..1937d8c 100644
2009-03-24USB: pxa27x_udc: add otg transceiver supportRobert Jarzmik
When a transceiver driver is used, no automatic udc enable is done. The transceiver (OTG or not) should : - take care of VBus sensing - call usb_gadget_vbus_connect() - call usb_gadget_vbus_disconnect() The pullup should remain within this driver's management, either by gpio_pullup of udc_command() fields. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24USB: pxa27x_udc: add vbus session handlingRobert Jarzmik
On vbus_session() call, optionally activate D+ pullup resistor and enable the udc, or deactivate D+ pullup resistor and disable the udc. It is intentional to not handle any VBus sense related irq. An external transceiver driver (like gpio_vbus) should catch VBus sense signal, and call usb_gadget_vbus_connect() or usb_gadget_vbus_disconnect(). Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-03-24USB: pxa27x_udc: factor pullup code to prepare otg transceiverRobert Jarzmik
Prepare pxa27x_udc to handle usb D+ pullup properly : it should connect the pullup resistor and disconnect it only if no external transceiver is handling it. [ dbrownell@users.sourceforge.net: kerneldoc and gpio fixes ] Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-06-15[ARM] 5080/1: touch PSSR_OTGPH only on pxa27x in ohci-pxa27x and pxa27x_udcPhilipp Zabel
and include pxa2xx-regs.h as build fix since PSSR definitions moved from pxa-regs.h into pxa2xx-regs.h. Note: This change is temporary as pxa27x processor specific code will be finally moved elsewhere (both drivers should support pxa3xx, too). Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-05-14USB: pxa27x_udc: minor fixesRobert Jarzmik
Minor fixes to pxa27x udc driver : - don't clobber driver model bus_id field - wrong endianess fix (no functional change; cpu is little-endian) - double udc disable fix - resume/suspend fix (OTG hold bit) - make driver pxa27x dependant (check cpu at runtime) Signed-off-by: Robert Jarzmik <rjarzmik@free.fr> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-02usb: pxa27x_udc driverRobert Jarzmik
Adds pxa27x udc driver to support USB peripherals on pxa27x chips. The driver is compatible with: Gadget Zero, the File Storage gadget, and the Ethernet gadget (only in CDC subset mode). The driver can't properly support multiple interfaces, because of hardware bugs without possible workaround. That means no RNDIS support from g_ether, and no CDC ACM support in g_serial. Signed-off-by: Robert Jarzmik <rjarzmik@free.fr> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>