* [PATCH linux-next v3 0/4] usb: gadget: udc: atmel: Endpoint allocation scheme fixes
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
0 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan at microchip.com @ 2017-04-03 7:19 UTC (permalink / raw)
To: linux-arm-kernel
From: Cristian Birsan <cristian.birsan@microchip.com>
This patch series provides fixes, based on the feedback received on the mailing list, for
the following:
- fifo table parameters validation against device tree values
- coding style
- message display for EP configuration error
- Kconfig comments for fifo_mode=0
Changes since v1:
- Removed static for usba_config_fifo_table() function from "Check fifo
configuration values against device tree" patch
Changes since v2:
- Use shorter warning message if the fifo table size is greather than device
tree value
- replace dev_warn() with dev_err() for hardware fifo allocation error
Cristian Birsan (4):
usb: gadget: udc: atmel: Check fifo configuration values against
device tree
usb: gadget: udc: atmel: Minor code cleanup
usb: gadget: udc: atmel: Use dev_err() to display EP configuration
error
usb: gadget: udc: atmel: Update Kconfig help for fifo_mode = 0
drivers/usb/gadget/udc/Kconfig | 5 ++--
drivers/usb/gadget/udc/atmel_usba_udc.c | 49 ++++++++++++++++++++++-----------
2 files changed, 36 insertions(+), 18 deletions(-)
--
2.7.4
^ permalink raw reply [flat|nested] 14+ messages in thread* [PATCH linux-next v3 1/4] usb: gadget: udc: atmel: Check fifo configuration values against device tree
2017-04-03 7:19 ` cristian.birsan at microchip.com
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
-1 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan @ 2017-04-03 7:19 UTC (permalink / raw)
To: nicolas.ferre, balbi, gregkh, linux-arm-kernel, linux-usb, linux-kernel
Cc: ludovic.desroches, alexandre.belloni, boris.brezillon, Cristian Birsan
From: Cristian Birsan <cristian.birsan@microchip.com>
Check fifo configuration values against device tree values for endpoint fifo
in auto configuration mode (fifo_mode=0).
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 2035906b..a98734a 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -2118,14 +2118,34 @@ 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,
+ "Using max fifo-size value from DT\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,
+ "Using max nb-banks value from DT\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
^ permalink raw reply related [flat|nested] 14+ messages in thread* [PATCH linux-next v3 1/4] usb: gadget: udc: atmel: Check fifo configuration values against device tree
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
0 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan at microchip.com @ 2017-04-03 7:19 UTC (permalink / raw)
To: linux-arm-kernel
From: Cristian Birsan <cristian.birsan@microchip.com>
Check fifo configuration values against device tree values for endpoint fifo
in auto configuration mode (fifo_mode=0).
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 2035906b..a98734a 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -2118,14 +2118,34 @@ 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,
+ "Using max fifo-size value from DT\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,
+ "Using max nb-banks value from DT\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
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 2/4] usb: gadget: udc: atmel: Minor code cleanup
2017-04-03 7:19 ` cristian.birsan at microchip.com
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
-1 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan @ 2017-04-03 7:19 UTC (permalink / raw)
To: nicolas.ferre, balbi, gregkh, linux-arm-kernel, linux-usb, linux-kernel
Cc: ludovic.desroches, alexandre.belloni, boris.brezillon, Cristian Birsan
From: Cristian Birsan <cristian.birsan@microchip.com>
Minor code cleanup based on feedback received on mailinglist.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index a98734a..8bc0b52a 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 = {
@@ -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);
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread* [PATCH linux-next v3 2/4] usb: gadget: udc: atmel: Minor code cleanup
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
0 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan at microchip.com @ 2017-04-03 7:19 UTC (permalink / raw)
To: linux-arm-kernel
From: Cristian Birsan <cristian.birsan@microchip.com>
Minor code cleanup based on feedback received on mailinglist.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index a98734a..8bc0b52a 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 = {
@@ -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);
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH linux-next v3 2/4] usb: gadget: udc: atmel: Minor code cleanup
2017-04-03 7:19 ` cristian.birsan at microchip.com
@ 2017-04-05 12:33 ` Felipe Balbi
-1 siblings, 0 replies; 14+ messages in thread
From: Felipe Balbi @ 2017-04-05 12:33 UTC (permalink / raw)
To: cristian.birsan, nicolas.ferre, gregkh, linux-arm-kernel,
linux-usb, linux-kernel
Cc: ludovic.desroches, alexandre.belloni, boris.brezillon, Cristian Birsan
[-- Attachment #1: Type: text/plain, Size: 384 bytes --]
Hi,
cristian.birsan@microchip.com writes:
> From: Cristian Birsan <cristian.birsan@microchip.com>
>
> Minor code cleanup based on feedback received on mailinglist.
>
> Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
patch 1 applied fine, patch 2 didn't. Please rebase on testing/next
--
balbi
[-- Attachment #2: signature.asc --]
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^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 2/4] usb: gadget: udc: atmel: Minor code cleanup
@ 2017-04-05 12:33 ` Felipe Balbi
0 siblings, 0 replies; 14+ messages in thread
From: Felipe Balbi @ 2017-04-05 12:33 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
cristian.birsan at microchip.com writes:
> From: Cristian Birsan <cristian.birsan@microchip.com>
>
> Minor code cleanup based on feedback received on mailinglist.
>
> Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
patch 1 applied fine, patch 2 didn't. Please rebase on testing/next
--
balbi
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH linux-next v3 2/4] usb: gadget: udc: atmel: Minor code cleanup
2017-04-05 12:33 ` Felipe Balbi
@ 2017-04-07 16:05 ` m91496
-1 siblings, 0 replies; 14+ messages in thread
From: m91496 @ 2017-04-07 16:05 UTC (permalink / raw)
To: Felipe Balbi, nicolas.ferre, gregkh, linux-arm-kernel, linux-usb,
linux-kernel
Cc: ludovic.desroches, alexandre.belloni, boris.brezillon
Hi,
The patch 2 does not apply because it's already on testing/next.
I'll send a new patch series version that will apply clean on top of testing branch.
Regards,
Cristi
On 05.04.2017 15:33, Felipe Balbi wrote:
>
> Hi,
>
> cristian.birsan@microchip.com writes:
>> From: Cristian Birsan <cristian.birsan@microchip.com>
>>
>> Minor code cleanup based on feedback received on mailinglist.
>>
>> Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
>> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
>
> patch 1 applied fine, patch 2 didn't. Please rebase on testing/next
>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 2/4] usb: gadget: udc: atmel: Minor code cleanup
@ 2017-04-07 16:05 ` m91496
0 siblings, 0 replies; 14+ messages in thread
From: m91496 @ 2017-04-07 16:05 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
The patch 2 does not apply because it's already on testing/next.
I'll send a new patch series version that will apply clean on top of testing branch.
Regards,
Cristi
On 05.04.2017 15:33, Felipe Balbi wrote:
>
> Hi,
>
> cristian.birsan at microchip.com writes:
>> From: Cristian Birsan <cristian.birsan@microchip.com>
>>
>> Minor code cleanup based on feedback received on mailinglist.
>>
>> Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
>> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
>
> patch 1 applied fine, patch 2 didn't. Please rebase on testing/next
>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 3/4] usb: gadget: udc: atmel: Use dev_err() to display EP configuration error
2017-04-03 7:19 ` cristian.birsan at microchip.com
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
-1 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan @ 2017-04-03 7:19 UTC (permalink / raw)
To: nicolas.ferre, balbi, gregkh, linux-arm-kernel, linux-usb, linux-kernel
Cc: ludovic.desroches, alexandre.belloni, boris.brezillon, Cristian Birsan
From: Cristian Birsan <cristian.birsan@microchip.com>
Use dev_err() to display EP configuration error to avoid silent failure.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 8bc0b52a..3ccc341 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -1851,8 +1851,8 @@ 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,
- "ODD: EP0 configuration is invalid!\n");
+ dev_err(&udc->pdev->dev,
+ "ODD: EP0 configuration is invalid!\n");
/* Preallocate other endpoints */
n = fifo_mode ? udc->num_ep : udc->configured_ep;
@@ -1860,8 +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_err(&udc->pdev->dev,
+ "ODD: EP%d configuration is invalid!\n", i);
}
}
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 3/4] usb: gadget: udc: atmel: Use dev_err() to display EP configuration error
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
0 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan at microchip.com @ 2017-04-03 7:19 UTC (permalink / raw)
To: linux-arm-kernel
From: Cristian Birsan <cristian.birsan@microchip.com>
Use dev_err() to display EP configuration error to avoid silent failure.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 8bc0b52a..3ccc341 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -1851,8 +1851,8 @@ 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,
- "ODD: EP0 configuration is invalid!\n");
+ dev_err(&udc->pdev->dev,
+ "ODD: EP0 configuration is invalid!\n");
/* Preallocate other endpoints */
n = fifo_mode ? udc->num_ep : udc->configured_ep;
@@ -1860,8 +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_err(&udc->pdev->dev,
+ "ODD: EP%d configuration is invalid!\n", i);
}
}
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 4/4] usb: gadget: udc: atmel: Update Kconfig help for fifo_mode = 0
2017-04-03 7:19 ` cristian.birsan at microchip.com
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
-1 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan @ 2017-04-03 7:19 UTC (permalink / raw)
To: nicolas.ferre, balbi, gregkh, linux-arm-kernel, linux-usb, linux-kernel
Cc: ludovic.desroches, alexandre.belloni, boris.brezillon, Cristian Birsan
From: Cristian Birsan <cristian.birsan@microchip.com>
Update Kconfig help for fifo_mode = 0 to explain the behavior better.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/Kconfig | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index c6cc9d3..1fd3fe9 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, for ep1 2 banks are allocated if it works in isochronous
+ mode and only 1 bank otherwise. For the rest of the endpoints
+ only 1 bank is allocated.
fifo_mode = 1 is a generic maximum fifo size (1024 bytes) configuration
allowing the usage of ep1 - ep6
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH linux-next v3 4/4] usb: gadget: udc: atmel: Update Kconfig help for fifo_mode = 0
@ 2017-04-03 7:19 ` cristian.birsan at microchip.com
0 siblings, 0 replies; 14+ messages in thread
From: cristian.birsan at microchip.com @ 2017-04-03 7:19 UTC (permalink / raw)
To: linux-arm-kernel
From: Cristian Birsan <cristian.birsan@microchip.com>
Update Kconfig help for fifo_mode = 0 to explain the behavior better.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
drivers/usb/gadget/udc/Kconfig | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index c6cc9d3..1fd3fe9 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, for ep1 2 banks are allocated if it works in isochronous
+ mode and only 1 bank otherwise. For the rest of the endpoints
+ only 1 bank is allocated.
fifo_mode = 1 is a generic maximum fifo size (1024 bytes) configuration
allowing the usage of ep1 - ep6
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread