diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2017-08-16 13:32:39 +0300 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2017-08-24 17:40:42 +0800 |
| commit | 581821ae7f7e2c4547945c65f1bcd357f5915aa5 (patch) | |
| tree | 0d41d8f23c0563c15b8374100ec85895afe743c4 | |
| parent | 7c3a8b81503ce8e6ab22341f0267d30085d17194 (diff) | |
| download | linux-581821ae7f7e2c4547945c65f1bcd357f5915aa5.tar.bz2 | |
usb: chipidea: udc: Support SKB alignment quirk
NVIDIA Tegra20 UDC can't cope with unaligned DMA and require a USB gadget
quirk that avoids SKB buffer alignment to be set in order to make Ethernet
Gadget working. Later Tegra generations do not require that quirk. Let's
add a new platform data flag that allows to enable USB gadget quirk for
platforms that require it.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 3 | ||||
| -rw-r--r-- | include/linux/usb/chipidea.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 6502c13331e8..fe8a90543ea3 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1896,6 +1896,9 @@ static int udc_start(struct ci_hdrc *ci) ci->gadget.name = ci->platdata->name; ci->gadget.otg_caps = otg_caps; + if (ci->platdata->flags & CI_HDRC_REQUIRES_ALIGNED_DMA) + ci->gadget.quirk_avoids_skb_reserve = 1; + if (ci->is_otg && (otg_caps->hnp_support || otg_caps->srp_support || otg_caps->adp_support)) ci->gadget.is_otg = 1; diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index c5fdfcf99828..d725cff7268d 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -58,6 +58,7 @@ struct ci_hdrc_platform_data { #define CI_HDRC_OVERRIDE_TX_BURST BIT(10) #define CI_HDRC_OVERRIDE_RX_BURST BIT(11) #define CI_HDRC_OVERRIDE_PHY_CONTROL BIT(12) /* Glue layer manages phy */ +#define CI_HDRC_REQUIRES_ALIGNED_DMA BIT(13) enum usb_dr_mode dr_mode; #define CI_HDRC_CONTROLLER_RESET_EVENT 0 #define CI_HDRC_CONTROLLER_STOPPED_EVENT 1 |