forked from luck/tmp_suning_uos_patched
usb: chipidea: udc: add pullup fuction, needed by the uvc gadget
Add function to physicaly enable or disable of pullup connection on the USB-D+ line. The uvc gaget will fail, if this function is not implemented. Cc: stable <stable@vger.kernel.org> Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -78,8 +78,7 @@ static inline int ep_to_bit(struct ci13xxx *ci, int n)
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}
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/**
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* hw_device_state: enables/disables interrupts & starts/stops device (execute
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* without interruption)
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* hw_device_state: enables/disables interrupts (execute without interruption)
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* @dma: 0 => disable, !0 => enable and set dma engine
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*
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* This function returns an error code
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@ -91,9 +90,7 @@ static int hw_device_state(struct ci13xxx *ci, u32 dma)
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/* interrupt, error, port change, reset, sleep/suspend */
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hw_write(ci, OP_USBINTR, ~0,
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USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
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hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
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} else {
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hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
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hw_write(ci, OP_USBINTR, ~0, 0);
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}
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return 0;
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@ -1420,6 +1417,21 @@ static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
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return -ENOTSUPP;
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}
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/* Change Data+ pullup status
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* this func is used by usb_gadget_connect/disconnet
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*/
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static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on)
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{
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struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
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if (is_on)
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hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
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else
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hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
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return 0;
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}
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static int ci13xxx_start(struct usb_gadget *gadget,
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struct usb_gadget_driver *driver);
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static int ci13xxx_stop(struct usb_gadget *gadget,
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@ -1432,6 +1444,7 @@ static int ci13xxx_stop(struct usb_gadget *gadget,
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static const struct usb_gadget_ops usb_gadget_ops = {
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.vbus_session = ci13xxx_vbus_session,
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.wakeup = ci13xxx_wakeup,
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.pullup = ci13xxx_pullup,
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.vbus_draw = ci13xxx_vbus_draw,
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.udc_start = ci13xxx_start,
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.udc_stop = ci13xxx_stop,
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