diff options
| author | Cristian Birsan <cristian.birsan@microchip.com> | 2017-01-23 15:45:59 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-01-24 10:04:24 +0100 |
| commit | 741d2558bf0aa8da9c0834ad43e1b9a1b16aa515 (patch) | |
| tree | ace7afcd11d93a35e7cfe50c30dbbc672446a910 /drivers/usb/gadget/udc/Kconfig | |
| parent | usb: gadget: f_fs: Accept up to 30 endpoints. (diff) | |
| download | linux-741d2558bf0aa8da9c0834ad43e1b9a1b16aa515.tar.xz linux-741d2558bf0aa8da9c0834ad43e1b9a1b16aa515.zip | |
usb: gadget: udc: atmel: Update endpoint allocation scheme
This patch updates the usb endpoint allocation scheme for atmel usba
driver to make sure all endpoints are allocated in order. This
requirement comes from the datasheet of the controller.
The allocation scheme is decided by fifo_mode parameter. For fifo_mode =
0 the driver tries to autoconfigure the endpoints fifo size. All other
modes contain fixed configurations optimized for different purposes. The
idea is somehow similar with the approach used on musb driver.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget/udc/Kconfig')
| -rw-r--r-- | drivers/usb/gadget/udc/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 658b8da60915..4b69f28a9af9 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -60,6 +60,20 @@ config USB_ATMEL_USBA USBA is the integrated high-speed USB Device controller on the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel. + 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. + + fifo_mode = 1 is a generic maximum fifo size (1024 bytes) configuration + allowing the usage of ep1 - ep6 + + fifo_mode = 2 is a generic performance maximum fifo size (1024 bytes) + configuration allowing the usage of ep1 - ep3 + + fifo_mode = 3 is a balanced performance configuration allowing the + the usage of ep1 - ep8 + config USB_BCM63XX_UDC tristate "Broadcom BCM63xx Peripheral Controller" depends on BCM63XX |