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path: root/drivers/usb/musb/musb_gadget_ep0.c
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Diffstat (limited to 'drivers/usb/musb/musb_gadget_ep0.c')
-rw-r--r--drivers/usb/musb/musb_gadget_ep0.c93
1 files changed, 34 insertions, 59 deletions
diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c
index 2af45a0c8930..f0786f8fbb25 100644
--- a/drivers/usb/musb/musb_gadget_ep0.c
+++ b/drivers/usb/musb/musb_gadget_ep0.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* MUSB OTG peripheral driver ep0 handling
*
@@ -5,32 +6,6 @@
* Copyright (C) 2005-2006 by Texas Instruments
* Copyright (C) 2006-2007 Nokia Corporation
* Copyright (C) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
*/
#include <linux/kernel.h>
@@ -85,7 +60,7 @@ static int service_tx_status_request(
switch (recip) {
case USB_RECIP_DEVICE:
- result[0] = musb->is_self_powered << USB_DEVICE_SELF_POWERED;
+ result[0] = musb->g.is_selfpowered << USB_DEVICE_SELF_POWERED;
result[0] |= musb->may_wakeup << USB_DEVICE_REMOTE_WAKEUP;
if (musb->g.is_otg) {
result[0] |= musb->g.b_hnp_enable
@@ -114,15 +89,19 @@ static int service_tx_status_request(
}
is_in = epnum & USB_DIR_IN;
- if (is_in) {
- epnum &= 0x0f;
+ epnum &= 0x0f;
+ if (epnum >= MUSB_C_NUM_EPS) {
+ handled = -EINVAL;
+ break;
+ }
+
+ if (is_in)
ep = &musb->endpoints[epnum].ep_in;
- } else {
+ else
ep = &musb->endpoints[epnum].ep_out;
- }
regs = musb->endpoints[epnum].regs;
- if (epnum >= MUSB_C_NUM_EPS || !ep->desc) {
+ if (!ep->desc) {
handled = -EINVAL;
break;
}
@@ -206,7 +185,7 @@ static inline void musb_try_b_hnp_enable(struct musb *musb)
void __iomem *mbase = musb->mregs;
u8 devctl;
- dev_dbg(musb->controller, "HNP: Setting HR\n");
+ musb_dbg(musb, "HNP: Setting HR");
devctl = musb_readb(mbase, MUSB_DEVCTL);
musb_writeb(mbase, MUSB_DEVCTL, devctl | MUSB_DEVCTL_HR);
}
@@ -303,7 +282,7 @@ __acquires(musb->lock)
/* Maybe start the first request in the queue */
request = next_request(musb_ep);
if (!musb_ep->busy && request) {
- dev_dbg(musb->controller, "restarting the request\n");
+ musb_dbg(musb, "restarting the request");
musb_ep_restart(musb, request);
}
@@ -332,27 +311,23 @@ __acquires(musb->lock)
goto stall;
switch (ctrlrequest->wIndex >> 8) {
- case 1:
- pr_debug("TEST_J\n");
- /* TEST_J */
+ case USB_TEST_J:
+ pr_debug("USB_TEST_J\n");
musb->test_mode_nr =
MUSB_TEST_J;
break;
- case 2:
- /* TEST_K */
- pr_debug("TEST_K\n");
+ case USB_TEST_K:
+ pr_debug("USB_TEST_K\n");
musb->test_mode_nr =
MUSB_TEST_K;
break;
- case 3:
- /* TEST_SE0_NAK */
- pr_debug("TEST_SE0_NAK\n");
+ case USB_TEST_SE0_NAK:
+ pr_debug("USB_TEST_SE0_NAK\n");
musb->test_mode_nr =
MUSB_TEST_SE0_NAK;
break;
- case 4:
- /* TEST_PACKET */
- pr_debug("TEST_PACKET\n");
+ case USB_TEST_PACKET:
+ pr_debug("USB_TEST_PACKET\n");
musb->test_mode_nr =
MUSB_TEST_PACKET;
break;
@@ -550,7 +525,7 @@ static void ep0_txstate(struct musb *musb)
if (!req) {
/* WARN_ON(1); */
- dev_dbg(musb->controller, "odd; csr0 %04x\n", musb_readw(regs, MUSB_CSR0));
+ musb_dbg(musb, "odd; csr0 %04x", musb_readw(regs, MUSB_CSR0));
return;
}
@@ -558,7 +533,7 @@ static void ep0_txstate(struct musb *musb)
/* load the data */
fifo_src = (u8 *) request->buf + request->actual;
- fifo_count = min((unsigned) MUSB_EP0_FIFOSIZE,
+ fifo_count = min_t(unsigned, MUSB_EP0_FIFOSIZE,
request->length - request->actual);
musb_write_fifo(&musb->endpoints[0], fifo_count, fifo_src);
request->actual += fifo_count;
@@ -607,7 +582,7 @@ musb_read_setup(struct musb *musb, struct usb_ctrlrequest *req)
/* NOTE: earlier 2.6 versions changed setup packets to host
* order, but now USB packets always stay in USB byte order.
*/
- dev_dbg(musb->controller, "SETUP req%02x.%02x v%04x i%04x l%d\n",
+ musb_dbg(musb, "SETUP req%02x.%02x v%04x i%04x l%d",
req->bRequestType,
req->bRequest,
le16_to_cpu(req->wValue),
@@ -675,7 +650,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
csr = musb_readw(regs, MUSB_CSR0);
len = musb_readb(regs, MUSB_COUNT0);
- dev_dbg(musb->controller, "csr %04x, count %d, ep0stage %s\n",
+ musb_dbg(musb, "csr %04x, count %d, ep0stage %s",
csr, len, decode_ep0stage(musb->ep0_state));
if (csr & MUSB_CSR0_P_DATAEND) {
@@ -752,7 +727,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
/* enter test mode if needed (exit by reset) */
else if (musb->test_mode) {
- dev_dbg(musb->controller, "entering TESTMODE\n");
+ musb_dbg(musb, "entering TESTMODE");
if (MUSB_TEST_PACKET == musb->test_mode_nr)
musb_load_testpacket(musb);
@@ -760,7 +735,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
musb_writeb(mbase, MUSB_TESTMODE,
musb->test_mode_nr);
}
- /* FALLTHROUGH */
+ fallthrough;
case MUSB_EP0_STAGE_STATUSOUT:
/* end of sequence #1: write to host (TX state) */
@@ -792,7 +767,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
*/
retval = IRQ_HANDLED;
musb->ep0_state = MUSB_EP0_STAGE_SETUP;
- /* FALLTHROUGH */
+ fallthrough;
case MUSB_EP0_STAGE_SETUP:
setup:
@@ -864,7 +839,7 @@ setup:
break;
}
- dev_dbg(musb->controller, "handled %d, csr %04x, ep0stage %s\n",
+ musb_dbg(musb, "handled %d, csr %04x, ep0stage %s",
handled, csr,
decode_ep0stage(musb->ep0_state));
@@ -881,7 +856,7 @@ setup:
if (handled < 0) {
musb_ep_select(mbase, 0);
stall:
- dev_dbg(musb->controller, "stall (%d)\n", handled);
+ musb_dbg(musb, "stall (%d)", handled);
musb->ackpend |= MUSB_CSR0_P_SENDSTALL;
musb->ep0_state = MUSB_EP0_STAGE_IDLE;
finish:
@@ -961,7 +936,7 @@ musb_g_ep0_queue(struct usb_ep *e, struct usb_request *r, gfp_t gfp_flags)
status = 0;
break;
default:
- dev_dbg(musb->controller, "ep0 request queued in state %d\n",
+ musb_dbg(musb, "ep0 request queued in state %d",
musb->ep0_state);
status = -EINVAL;
goto cleanup;
@@ -970,7 +945,7 @@ musb_g_ep0_queue(struct usb_ep *e, struct usb_request *r, gfp_t gfp_flags)
/* add request to the list */
list_add_tail(&req->list, &ep->req_list);
- dev_dbg(musb->controller, "queue to %s (%s), length=%d\n",
+ musb_dbg(musb, "queue to %s (%s), length=%d",
ep->name, ep->is_in ? "IN/TX" : "OUT/RX",
req->request.length);
@@ -1049,7 +1024,7 @@ static int musb_g_ep0_halt(struct usb_ep *e, int value)
case MUSB_EP0_STAGE_ACKWAIT: /* STALL for zero-length data */
case MUSB_EP0_STAGE_RX: /* control-OUT data */
csr = musb_readw(regs, MUSB_CSR0);
- /* FALLTHROUGH */
+ fallthrough;
/* It's also OK to issue stalls during callbacks when a non-empty
* DATA stage buffer has been read (or even written).
@@ -1063,7 +1038,7 @@ static int musb_g_ep0_halt(struct usb_ep *e, int value)
musb->ackpend = 0;
break;
default:
- dev_dbg(musb->controller, "ep0 can't halt in state %d\n", musb->ep0_state);
+ musb_dbg(musb, "ep0 can't halt in state %d", musb->ep0_state);
status = -EINVAL;
}
generated by cgit (git 2.34.1) at 2025-12-26 01:55:54 +0000