From: Vahram Aharonyan <vahr...@synopsys.com>
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: Vahram Aharonyan <vahr...@synopsys.com>
Signed-off-by: John Youn <johny...@synopsys.com>
---
drivers/usb/dwc2/core.h | 2 ++
drivers/usb/dwc2/gadget.c | 11 +++++++++++
drivers/usb/dwc2/params.c | 6 ++++++
3 files changed, 19 insertions(+)
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index f8c97f5..32a3cfc 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -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];
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 1ba0bfc..4013518 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -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
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 74c3728..2f18a7b 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -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);
}
/**
--
2.10.0
--
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