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Message-ID: <1486748284-27597-1-git-send-email-cristian.birsan@microchip.com>
Date: Fri, 10 Feb 2017 19:38:04 +0200
From: <cristian.birsan@...rochip.com>
To: <nicolas.ferre@...el.com>, <balbi@...nel.org>,
<gregkh@...uxfoundation.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <ludovic.desroches@...el.com>,
<alexandre.belloni@...e-electrons.com>,
<boris.brezillon@...e-electrons.com>,
Cristian Birsan <cristian.birsan@...rochip.com>
Subject: [PATCH] usb: gadget: udc: atmel: Endpoint allocation scheme fixes
From: Cristian Birsan <cristian.birsan@...rochip.com>
This patch provides fixes for the following:
- fifo table parameters validation against device tree values
- coding style
- error message display
- Kconfig comments
Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>
---
drivers/usb/gadget/udc/Kconfig | 5 ++--
drivers/usb/gadget/udc/atmel_usba_udc.c | 47 ++++++++++++++++++++++-----------
2 files changed, 35 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index 4b69f28..947ebdf 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -62,8 +62,9 @@ config USB_ATMEL_USBA
The fifo_mode parameter is used to select endpoint allocation mode.
fifo_mode = 0 is used to let the driver autoconfigure the endpoints.
- In this case 2 banks are allocated for isochronous endpoints and
- only one bank is allocated for the rest of the endpoints.
+ In this case 2 banks are allocated so that they could be used as
+ isochronous endpoints. Only one bank is allocated for the rest
+ of the endpoints.
fifo_mode = 1 is a generic maximum fifo size (1024 bytes) configuration
allowing the usage of ep1 - ep6
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 11bbce2..50f018a 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -321,7 +321,6 @@ static inline void usba_cleanup_debugfs(struct usba_udc *udc)
static ushort fifo_mode;
-/* "modprobe ... fifo_mode=1" etc */
module_param(fifo_mode, ushort, 0x0);
MODULE_PARM_DESC(fifo_mode, "Endpoint configuration mode");
@@ -371,7 +370,7 @@ static struct usba_fifo_cfg mode_4_cfg[] = {
};
/* Add additional configurations here */
-int usba_config_fifo_table(struct usba_udc *udc)
+static int usba_config_fifo_table(struct usba_udc *udc)
{
int n;
@@ -1076,11 +1075,9 @@ static int atmel_usba_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver);
static int atmel_usba_stop(struct usb_gadget *gadget);
-static struct usb_ep *atmel_usba_match_ep(
- struct usb_gadget *gadget,
- struct usb_endpoint_descriptor *desc,
- struct usb_ss_ep_comp_descriptor *ep_comp
-)
+static struct usb_ep *atmel_usba_match_ep(struct usb_gadget *gadget,
+ struct usb_endpoint_descriptor *desc,
+ struct usb_ss_ep_comp_descriptor *ep_comp)
{
struct usb_ep *_ep;
struct usba_ep *ep;
@@ -1100,7 +1097,6 @@ static struct usb_ep *atmel_usba_match_ep(
ep = to_usba_ep(_ep);
switch (usb_endpoint_type(desc)) {
-
case USB_ENDPOINT_XFER_CONTROL:
break;
@@ -1141,7 +1137,7 @@ static struct usb_ep *atmel_usba_match_ep(
ep->udc->configured_ep++;
}
-return _ep;
+ return _ep;
}
static const struct usb_gadget_ops usba_udc_ops = {
@@ -1855,7 +1851,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
* but it's clearly harmless...
*/
if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
- dev_dbg(&udc->pdev->dev,
+ dev_warn(&udc->pdev->dev,
"ODD: EP0 configuration is invalid!\n");
/* Preallocate other endpoints */
@@ -1864,8 +1860,8 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
ep = &udc->usba_ep[i];
usba_ep_writel(ep, CFG, ep->ept_cfg);
if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED))
- dev_dbg(&udc->pdev->dev,
- "ODD: EP%d configuration is invalid!\n", i);
+ dev_warn(&udc->pdev->dev,
+ "ODD: EP%d configuration is invalid!\n", i);
}
}
@@ -2089,8 +2085,9 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
while ((pp = of_get_next_child(np, pp)))
udc->num_ep++;
udc->configured_ep = 1;
- } else
+ } else {
udc->num_ep = usba_config_fifo_table(udc);
+ }
eps = devm_kzalloc(&pdev->dev, sizeof(struct usba_ep) * udc->num_ep,
GFP_KERNEL);
@@ -2118,14 +2115,34 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
dev_err(&pdev->dev, "of_probe: fifo-size error(%d)\n", ret);
goto err;
}
- ep->fifo_size = fifo_mode ? udc->fifo_cfg[i].fifo_size : val;
+ if (fifo_mode) {
+ if (val < udc->fifo_cfg[i].fifo_size) {
+ dev_warn(&pdev->dev,
+ "of_probe: fifo-size table value not supported by HW, using DT value\n");
+ ep->fifo_size = val;
+ } else {
+ ep->fifo_size = udc->fifo_cfg[i].fifo_size;
+ }
+ } else {
+ ep->fifo_size = val;
+ }
ret = of_property_read_u32(pp, "atmel,nb-banks", &val);
if (ret) {
dev_err(&pdev->dev, "of_probe: nb-banks error(%d)\n", ret);
goto err;
}
- ep->nr_banks = fifo_mode ? udc->fifo_cfg[i].nr_banks : val;
+ if (fifo_mode) {
+ if (val < udc->fifo_cfg[i].nr_banks) {
+ dev_warn(&pdev->dev,
+ "of_probe: nb-banks table value not supported by HW, using DT value\n");
+ ep->nr_banks = val;
+ } else {
+ ep->nr_banks = udc->fifo_cfg[i].nr_banks;
+ }
+ } else {
+ ep->nr_banks = val;
+ }
ep->can_dma = of_property_read_bool(pp, "atmel,can-dma");
ep->can_isoc = of_property_read_bool(pp, "atmel,can-isoc");
--
2.7.4
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