From: Vahram Aharonyan <vahr...@synopsys.com>
Add DMA descriptor members to the dwc2_hsotg_ep structure.
Signed-off-by: Vahram Aharonyan <vahr...@synopsys.com>
Signed-off-by: John Youn <johny...@synopsys.com>
---
drivers/usb/dwc2/core.h | 7 +++++++
drivers/usb/dwc2/gadget.c | 36 ++++++++++++++++++++++++++++++++++--
2 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 9f5fbcf..9155567 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -172,6 +172,9 @@ struct dwc2_hsotg_req;
* @periodic: Set if this is a periodic ep, such as Interrupt
* @isochronous: Set if this is a isochronous ep
* @send_zlp: Set if we need to send a zero-length packet.
+ * @desc_list_dma: The DMA address of descriptor chain currently in use.
+ * @desc_list: Pointer to descriptor DMA chain head currently in use.
+ * @desc_count: Count of entries within the DMA descriptor chain of EP.
* @total_data: The total number of data bytes done.
* @fifo_size: The size of the FIFO (for periodic IN endpoints)
* @fifo_load: The amount of data loaded into the FIFO (periodic IN)
@@ -219,6 +222,10 @@ struct dwc2_hsotg_ep {
#define TARGET_FRAME_INITIAL 0xFFFFFFFF
bool frame_overrun;
+ dma_addr_t desc_list_dma;
+ struct dwc2_dma_desc *desc_list;
+ u8 desc_count;
+
char name[10];
};
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 520b98a..47b5ce4 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3086,6 +3086,21 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n",
__func__, epctrl, epctrl_reg);
+ /* Allocate DMA descriptor chain for non-ctrl endpoints */
+ if (using_desc_dma(hsotg)) {
+ hs_ep->desc_list = dma_alloc_coherent(hsotg->dev,
+ MAX_DMA_DESC_NUM_GENERIC *
+ sizeof(struct dwc2_dma_desc),
+ &hs_ep->desc_list_dma, GFP_KERNEL);
+ if (!hs_ep->desc_list) {
+ dev_err(hsotg->dev,
+ "%s: unable to allocate desc chain fore EP\n",
+ __func__);
+ ret = -ENOMEM;
+ goto error2;
+ }
+ }
+
spin_lock_irqsave(&hsotg->lock, flags);
epctrl &= ~(DXEPCTL_EPTYPE_MASK | DXEPCTL_MPS_MASK);
@@ -3169,7 +3184,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
dev_err(hsotg->dev,
"%s: No suitable fifo found\n", __func__);
ret = -ENOMEM;
- goto error;
+ goto error1;
}
hsotg->fifo_map |= 1 << fifo_index;
epctrl |= DXEPCTL_TXFNUM(fifo_index);
@@ -3191,8 +3206,17 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
/* enable the endpoint interrupt */
dwc2_hsotg_ctrl_epint(hsotg, index, dir_in, 1);
-error:
+error1:
spin_unlock_irqrestore(&hsotg->lock, flags);
+
+error2:
+ if (ret && using_desc_dma(hsotg) && hs_ep->desc_list) {
+ dma_free_coherent(hsotg->dev, MAX_DMA_DESC_NUM_GENERIC *
+ sizeof(struct dwc2_dma_desc),
+ hs_ep->desc_list, hs_ep->desc_list_dma);
+ hs_ep->desc_list = NULL;
+ }
+
return ret;
}
@@ -3217,6 +3241,14 @@ static int dwc2_hsotg_ep_disable(struct usb_ep *ep)
return -EINVAL;
}
+ /* Remove DMA memory allocated for non-control Endpoints */
+ if (using_desc_dma(hsotg)) {
+ dma_free_coherent(hsotg->dev, MAX_DMA_DESC_NUM_GENERIC *
+ sizeof(struct dwc2_dma_desc),
+ hs_ep->desc_list, hs_ep->desc_list_dma);
+ hs_ep->desc_list = NULL;
+ }
+
epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
spin_lock_irqsave(&hsotg->lock, flags);
--
2.10.0
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