diff options
Diffstat (limited to 'drivers/net/can/dev/dev.c')
| -rw-r--r-- | drivers/net/can/dev/dev.c | 80 |
1 files changed, 75 insertions, 5 deletions
diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c index 3913971125de..15ccedbb3f8d 100644 --- a/drivers/net/can/dev/dev.c +++ b/drivers/net/can/dev/dev.c @@ -4,17 +4,17 @@ * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com> */ -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/netdevice.h> -#include <linux/if_arp.h> -#include <linux/workqueue.h> #include <linux/can.h> #include <linux/can/can-ml.h> #include <linux/can/dev.h> #include <linux/can/skb.h> #include <linux/gpio/consumer.h> +#include <linux/if_arp.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> #include <linux/of.h> +#include <linux/slab.h> +#include <linux/workqueue.h> static void can_update_state_error_stats(struct net_device *dev, enum can_state new_state) @@ -88,6 +88,39 @@ const char *can_get_state_str(const enum can_state state) } EXPORT_SYMBOL_GPL(can_get_state_str); +const char *can_get_ctrlmode_str(u32 ctrlmode) +{ + switch (ctrlmode & ~(ctrlmode - 1)) { + case 0: + return "none"; + case CAN_CTRLMODE_LOOPBACK: + return "loopback"; + case CAN_CTRLMODE_LISTENONLY: + return "listen-only"; + case CAN_CTRLMODE_3_SAMPLES: + return "triple-sampling"; + case CAN_CTRLMODE_ONE_SHOT: + return "one-shot"; + case CAN_CTRLMODE_BERR_REPORTING: + return "berr-reporting"; + case CAN_CTRLMODE_FD: + return "fd"; + case CAN_CTRLMODE_PRESUME_ACK: + return "presume-ack"; + case CAN_CTRLMODE_FD_NON_ISO: + return "fd-non-iso"; + case CAN_CTRLMODE_CC_LEN8_DLC: + return "cc-len8-dlc"; + case CAN_CTRLMODE_TDC_AUTO: + return "fd-tdc-auto"; + case CAN_CTRLMODE_TDC_MANUAL: + return "fd-tdc-manual"; + default: + return "<unknown>"; + } +} +EXPORT_SYMBOL_GPL(can_get_ctrlmode_str); + static enum can_state can_state_err_to_state(u16 err) { if (err < CAN_ERROR_WARNING_THRESHOLD) @@ -240,6 +273,8 @@ void can_setup(struct net_device *dev) { dev->type = ARPHRD_CAN; dev->mtu = CAN_MTU; + dev->min_mtu = CAN_MTU; + dev->max_mtu = CAN_MTU; dev->hard_header_len = 0; dev->addr_len = 0; dev->tx_queue_len = 10; @@ -309,6 +344,21 @@ void free_candev(struct net_device *dev) } EXPORT_SYMBOL_GPL(free_candev); +void can_set_default_mtu(struct net_device *dev) +{ + struct can_priv *priv = netdev_priv(dev); + + if (priv->ctrlmode & CAN_CTRLMODE_FD) { + dev->mtu = CANFD_MTU; + dev->min_mtu = CANFD_MTU; + dev->max_mtu = CANFD_MTU; + } else { + dev->mtu = CAN_MTU; + dev->min_mtu = CAN_MTU; + dev->max_mtu = CAN_MTU; + } +} + /* changing MTU and control mode for CAN/CANFD devices */ int can_change_mtu(struct net_device *dev, int new_mtu) { @@ -347,6 +397,26 @@ int can_change_mtu(struct net_device *dev, int new_mtu) } EXPORT_SYMBOL_GPL(can_change_mtu); +/* helper to define static CAN controller features at device creation time */ +int can_set_static_ctrlmode(struct net_device *dev, u32 static_mode) +{ + struct can_priv *priv = netdev_priv(dev); + + /* alloc_candev() succeeded => netdev_priv() is valid at this point */ + if (priv->ctrlmode_supported & static_mode) { + netdev_warn(dev, + "Controller features can not be supported and static at the same time\n"); + return -EINVAL; + } + priv->ctrlmode = static_mode; + + /* override MTU which was set by default in can_setup()? */ + can_set_default_mtu(dev); + + return 0; +} +EXPORT_SYMBOL_GPL(can_set_static_ctrlmode); + /* generic implementation of netdev_ops::ndo_eth_ioctl for CAN devices * supporting hardware timestamps */ |