linux-kernel - [PATCH 4/7] usb: gadget: udc: atmel: simplify endpoint allocation

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Date:   Tue, 7 Apr 2020 15:28:49 +0300
From:   <cristian.birsan@...rochip.com>
To:     <balbi@...nel.org>, <gregkh@...uxfoundation.org>,
        <nicolas.ferre@...rochip.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>,
        Cristian Birsan <cristian.birsan@...rochip.com>
Subject: [PATCH 4/7] usb: gadget: udc: atmel: simplify endpoint allocation

From: Cristian Birsan <cristian.birsan@...rochip.com>

Simplify the endpoint allocation and cleanup the code.

Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>
---
 drivers/usb/gadget/udc/atmel_usba_udc.c | 21 ++++++++-------------
 drivers/usb/gadget/udc/atmel_usba_udc.h |  1 -
 2 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index c50902b91a96..7011438f91d6 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -1097,7 +1097,6 @@ static struct usb_ep *atmel_usba_match_ep(struct usb_gadget *gadget,
 
 		ep->ept_cfg |= USBA_BF(BK_NUMBER, ep->nr_banks);
 
-		ep->udc->configured_ep++;
 	}
 
 	return _ep;
@@ -1790,7 +1789,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 
 	if (status & USBA_END_OF_RESET) {
 		struct usba_ep *ep0, *ep;
-		int i, n;
+		int i;
 
 		usba_writel(udc, INT_CLR,
 			USBA_END_OF_RESET|USBA_END_OF_RESUME
@@ -1838,13 +1837,14 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 				"ODD: EP0 configuration is invalid!\n");
 
 		/* Preallocate other endpoints */
-		n = fifo_mode ? udc->num_ep : udc->configured_ep;
-		for (i = 1; i < n; i++) {
+		for (i = 1; i < udc->num_ep; i++) {
 			ep = &udc->usba_ep[i];
-			usba_ep_writel(ep, CFG, ep->ept_cfg);
-			if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED))
-				dev_err(&udc->pdev->dev,
-					"ODD: EP%d configuration is invalid!\n", i);
+			if (ep->ep.claimed) {
+				usba_ep_writel(ep, CFG, ep->ept_cfg);
+				if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED))
+					dev_err(&udc->pdev->dev,
+						"ODD: EP%d configuration is invalid!\n", i);
+			}
 		}
 	}
 
@@ -2011,10 +2011,6 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
 	if (udc->vbus_pin)
 		disable_irq(gpiod_to_irq(udc->vbus_pin));
 
-	if (fifo_mode == 0)
-		udc->configured_ep = 1;
-
-	udc->suspended = false;
 	usba_stop(udc);
 
 	udc->driver = NULL;
@@ -2096,7 +2092,6 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 		pp = NULL;
 		while ((pp = of_get_next_child(np, pp)))
 			udc->num_ep++;
-		udc->configured_ep = 1;
 	} else {
 		udc->num_ep = usba_config_fifo_table(udc);
 	}
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index a0225e4543d4..8de79356d31d 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -324,7 +324,6 @@ struct usba_udc {
 	int irq;
 	struct gpio_desc *vbus_pin;
 	int num_ep;
-	int configured_ep;
 	struct usba_fifo_cfg *fifo_cfg;
 	struct clk *pclk;
 	struct clk *hclk;
-- 
2.17.1