From: Pali Rohár <pali@kernel.org>
Date: Sun, 7 Feb 2021 13:50:07 +0000 (+0100)
Subject: usb: musb: Fix transmission of bigger buffers
X-Git-Tag: v2025.01-rc5-pxa1908~1977^2~10
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-logo.png?a=commitdiff_plain;h=ea7125c4c6d25bbaf7927efc753357e64612bffb;p=u-boot.git

usb: musb: Fix transmission of bigger buffers

If udc_endpoint_write() was called with bigger payload which does not fit
into one USB packet it is needed to transmit payload in more USB packets.
First packet is transmitted by udc_endpoint_write() call itself and other
packets are put into waiting queue.

Implement function musb_peri_tx() which checks if endpoints are ready for
transmit and continue transmission of waiting queue.

This patch fixes sending big output from printenv command over usbtty
serial console.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Acked-by: Pavel Machek <pavel@ucw.cz>>
---

diff --git a/drivers/usb/musb/musb_udc.c b/drivers/usb/musb/musb_udc.c
index 67d1c56f9a..28719cc3f6 100644
--- a/drivers/usb/musb/musb_udc.c
+++ b/drivers/usb/musb/musb_udc.c
@@ -708,21 +708,16 @@ static void musb_peri_rx(u16 intr)
 
 static void musb_peri_tx(u16 intr)
 {
+	unsigned int ep;
+
 	/* Check for EP0 */
 	if (0x01 & intr)
 		musb_peri_ep0_tx();
 
-	/*
-	 * Use this in the future when handling epN tx
-	 *
-	 * u8 ep;
-	 *
-	 * for (ep = 1; ep < 16; ep++) {
-	 *	if ((1 << ep) & intr) {
-	 *		/ * handle tx for this endpoint * /
-	 *	}
-	 * }
-	 */
+	for (ep = 1; ep < 16; ep++) {
+		if ((1 << ep) & intr)
+			udc_endpoint_write(GET_ENDPOINT(udc_device, ep));
+	}
 }
 
 void udc_irq(void)