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Merge branch 'master' of git://gitorious.org/linux-can/linux-can-next
This commit is contained in:
David S. Miller
commit
9b97b84eb5
@ -232,16 +232,16 @@ solution for a couple of reasons:
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arbitration problems and error frames caused by the different
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ECUs. The occurrence of detected errors are important for diagnosis
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and have to be logged together with the exact timestamp. For this
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reason the CAN interface driver can generate so called Error Frames
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that can optionally be passed to the user application in the same
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way as other CAN frames. Whenever an error on the physical layer
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reason the CAN interface driver can generate so called Error Message
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Frames that can optionally be passed to the user application in the
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same way as other CAN frames. Whenever an error on the physical layer
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or the MAC layer is detected (e.g. by the CAN controller) the driver
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creates an appropriate error frame. Error frames can be requested by
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the user application using the common CAN filter mechanisms. Inside
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this filter definition the (interested) type of errors may be
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selected. The reception of error frames is disabled by default.
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The format of the CAN error frame is briefly described in the Linux
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header file "include/linux/can/error.h".
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creates an appropriate error message frame. Error messages frames can
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be requested by the user application using the common CAN filter
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mechanisms. Inside this filter definition the (interested) type of
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errors may be selected. The reception of error messages is disabled
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by default. The format of the CAN error message frame is briefly
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described in the Linux header file "include/linux/can/error.h".
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4. How to use Socket CAN
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------------------------
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@ -383,7 +383,7 @@ solution for a couple of reasons:
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defaults are set at RAW socket binding time:
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- The filters are set to exactly one filter receiving everything
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- The socket only receives valid data frames (=> no error frames)
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- The socket only receives valid data frames (=> no error message frames)
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- The loopback of sent CAN frames is enabled (see chapter 3.2)
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- The socket does not receive its own sent frames (in loopback mode)
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@ -434,7 +434,7 @@ solution for a couple of reasons:
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4.1.2 RAW socket option CAN_RAW_ERR_FILTER
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As described in chapter 3.4 the CAN interface driver can generate so
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called Error Frames that can optionally be passed to the user
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called Error Message Frames that can optionally be passed to the user
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application in the same way as other CAN frames. The possible
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errors are divided into different error classes that may be filtered
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using the appropriate error mask. To register for every possible
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@ -527,7 +527,7 @@ solution for a couple of reasons:
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rcvlist_all - list for unfiltered entries (no filter operations)
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rcvlist_eff - list for single extended frame (EFF) entries
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rcvlist_err - list for error frames masks
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rcvlist_err - list for error message frames masks
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rcvlist_fil - list for mask/value filters
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rcvlist_inv - list for mask/value filters (inverse semantic)
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rcvlist_sff - list for single standard frame (SFF) entries
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@ -784,13 +784,13 @@ solution for a couple of reasons:
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$ ip link set canX type can restart-ms 100
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Alternatively, the application may realize the "bus-off" condition
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by monitoring CAN error frames and do a restart when appropriate with
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the command:
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by monitoring CAN error message frames and do a restart when
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appropriate with the command:
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$ ip link set canX type can restart
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Note that a restart will also create a CAN error frame (see also
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chapter 3.4).
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Note that a restart will also create a CAN error message frame (see
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also chapter 3.4).
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6.6 Supported CAN hardware
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@ -1056,6 +1056,42 @@ static struct of_device_id flexcan_of_match[] = {
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{},
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};
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#ifdef CONFIG_PM
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static int flexcan_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct net_device *dev = platform_get_drvdata(pdev);
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struct flexcan_priv *priv = netdev_priv(dev);
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flexcan_chip_disable(priv);
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if (netif_running(dev)) {
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netif_stop_queue(dev);
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netif_device_detach(dev);
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}
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priv->can.state = CAN_STATE_SLEEPING;
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return 0;
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}
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static int flexcan_resume(struct platform_device *pdev)
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{
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struct net_device *dev = platform_get_drvdata(pdev);
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struct flexcan_priv *priv = netdev_priv(dev);
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priv->can.state = CAN_STATE_ERROR_ACTIVE;
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if (netif_running(dev)) {
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netif_device_attach(dev);
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netif_start_queue(dev);
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}
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flexcan_chip_enable(priv);
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return 0;
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}
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#else
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#define flexcan_suspend NULL
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#define flexcan_resume NULL
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#endif
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static struct platform_driver flexcan_driver = {
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.driver = {
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.name = DRV_NAME,
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@ -1064,6 +1100,8 @@ static struct platform_driver flexcan_driver = {
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},
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.probe = flexcan_probe,
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.remove = __devexit_p(flexcan_remove),
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.suspend = flexcan_suspend,
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.resume = flexcan_resume,
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};
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module_platform_driver(flexcan_driver);
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@ -21,7 +21,7 @@
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/* special address description flags for the CAN_ID */
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#define CAN_EFF_FLAG 0x80000000U /* EFF/SFF is set in the MSB */
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#define CAN_RTR_FLAG 0x40000000U /* remote transmission request */
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#define CAN_ERR_FLAG 0x20000000U /* error frame */
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#define CAN_ERR_FLAG 0x20000000U /* error message frame */
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/* valid bits in CAN ID for frame formats */
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#define CAN_SFF_MASK 0x000007FFU /* standard frame format (SFF) */
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@ -32,14 +32,14 @@
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* Controller Area Network Identifier structure
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*
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* bit 0-28 : CAN identifier (11/29 bit)
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* bit 29 : error frame flag (0 = data frame, 1 = error frame)
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* bit 29 : error message frame flag (0 = data frame, 1 = error message)
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* bit 30 : remote transmission request flag (1 = rtr frame)
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* bit 31 : frame format flag (0 = standard 11 bit, 1 = extended 29 bit)
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*/
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typedef __u32 canid_t;
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/*
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* Controller Area Network Error Frame Mask structure
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* Controller Area Network Error Message Frame Mask structure
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*
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* bit 0-28 : error class mask (see include/linux/can/error.h)
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* bit 29-31 : set to zero
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@ -97,7 +97,7 @@ struct sockaddr_can {
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* <received_can_id> & mask == can_id & mask
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*
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* The filter can be inverted (CAN_INV_FILTER bit set in can_id) or it can
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* filter for error frames (CAN_ERR_FLAG bit set in mask).
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* filter for error message frames (CAN_ERR_FLAG bit set in mask).
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*/
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struct can_filter {
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canid_t can_id;
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@ -1,7 +1,7 @@
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/*
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* linux/can/error.h
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*
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* Definitions of the CAN error frame to be filtered and passed to the user.
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* Definitions of the CAN error messages to be filtered and passed to the user.
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*
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* Author: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
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* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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@ -12,7 +12,7 @@
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#ifndef CAN_ERROR_H
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#define CAN_ERROR_H
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#define CAN_ERR_DLC 8 /* dlc for error frames */
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#define CAN_ERR_DLC 8 /* dlc for error message frames */
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/* error class (mask) in can_id */
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#define CAN_ERR_TX_TIMEOUT 0x00000001U /* TX timeout (by netdevice driver) */
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@ -334,8 +334,8 @@ static struct dev_rcv_lists *find_dev_rcv_lists(struct net_device *dev)
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* relevant bits for the filter.
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*
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* The filter can be inverted (CAN_INV_FILTER bit set in can_id) or it can
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* filter for error frames (CAN_ERR_FLAG bit set in mask). For error frames
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* there is a special filterlist and a special rx path filter handling.
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* filter for error messages (CAN_ERR_FLAG bit set in mask). For error msg
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* frames there is a special filterlist and a special rx path filter handling.
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*
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* Return:
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* Pointer to optimal filterlist for the given can_id/mask pair.
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@ -347,7 +347,7 @@ static struct hlist_head *find_rcv_list(canid_t *can_id, canid_t *mask,
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{
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canid_t inv = *can_id & CAN_INV_FILTER; /* save flag before masking */
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/* filter for error frames in extra filterlist */
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/* filter for error message frames in extra filterlist */
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if (*mask & CAN_ERR_FLAG) {
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/* clear CAN_ERR_FLAG in filter entry */
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*mask &= CAN_ERR_MASK;
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@ -408,7 +408,7 @@ static struct hlist_head *find_rcv_list(canid_t *can_id, canid_t *mask,
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* <received_can_id> & mask == can_id & mask
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*
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* The filter can be inverted (CAN_INV_FILTER bit set in can_id) or it can
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* filter for error frames (CAN_ERR_FLAG bit set in mask).
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* filter for error message frames (CAN_ERR_FLAG bit set in mask).
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*
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* The provided pointer to the sk_buff is guaranteed to be valid as long as
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* the callback function is running. The callback function must *not* free
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@ -578,7 +578,7 @@ static int can_rcv_filter(struct dev_rcv_lists *d, struct sk_buff *skb)
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return 0;
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if (can_id & CAN_ERR_FLAG) {
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/* check for error frame entries only */
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/* check for error message frame entries only */
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hlist_for_each_entry_rcu(r, n, &d->rx[RX_ERR], list) {
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if (can_id & r->mask) {
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deliver(skb, r);
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