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Commit dec4b556 authored by Vahram Aharonyan's avatar Vahram Aharonyan Committed by Felipe Balbi
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usb: dwc2: gadget: Add descriptor DMA parameter 



Add a parameter for descriptor DMA and set it based on hardware
capabilities. This won't actually be used by the gadget until later,
when the descriptor DMA code is in place.

Signed-off-by: default avatarVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent aa4049f3

drivers/usb/dwc2/core.h

+2 −0
Original line number Diff line number Diff line
@@ -419,6 +419,7 @@ enum dwc2_ep0_state { 
 *			0 - No (default)

 *			1 - Yes

 * @g_dma:              Enables gadget dma usage (default: autodetect).

 * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).

 * @g_rx_fifo_size:	The periodic rx fifo size for the device, in

 *			DWORDS from 16-32768 (default: 2048 if

 *			possible, otherwise autodetect).
@@ -498,6 +499,7 @@ struct dwc2_core_params { 


	/* Gadget parameters */

	bool g_dma;

	bool g_dma_desc;

	u16 g_rx_fifo_size;

	u16 g_np_tx_fifo_size;

	u32 g_tx_fifo_size[MAX_EPS_CHANNELS];

drivers/usb/dwc2/gadget.c

+11 −0
Original line number Diff line number Diff line
@@ -96,6 +96,17 @@ static inline bool using_dma(struct dwc2_hsotg *hsotg) 
	return hsotg->params.g_dma;

}



/*

 * using_desc_dma - return the descriptor DMA status of the driver.

 * @hsotg: The driver state.

 *

 * Return true if we're using descriptor DMA.

 */

static inline bool using_desc_dma(struct dwc2_hsotg *hsotg)

{

	return hsotg->params.g_dma_desc;

}



/**

 * dwc2_gadget_incr_frame_num - Increments the targeted frame number.

 * @hs_ep: The endpoint

drivers/usb/dwc2/params.c

+6 −0
Original line number Diff line number Diff line
@@ -1097,6 +1097,12 @@ static void dwc2_set_gadget_dma(struct dwc2_hsotg *hsotg) 
			    false, "gadget-dma",

			    true, false,

			    dma_capable);



	/* DMA Descriptor */

	dwc2_set_param_bool(hsotg, &p->g_dma_desc, false,

			    "gadget-dma-desc",

			    p->g_dma, false,

			    !!hw->dma_desc_enable);

}



/**