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can: peak_usb_fd: add support for ISO / non-ISO mode switching

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The PCAN USB (pro) FD adapters with firmware versions > 2.x support the
switching between ISO (default) and non-ISO conform bitstreams on the CAN bus.
The setting for the 2.x firmware adapters can be modified with the 'ip' tool
from the iproute2 package (option: fd-non-iso [on|off]).

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2015-03-16 11:57:53 +01:00 committed by Marc Kleine-Budde
parent 3ef5247e03
commit 0f251e45c7
2 changed files with 30 additions and 2 deletions
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1
drivers/net/can/usb/peak_usb/pcan_ucan.h
View file

@ -104,6 +104,7 @@ struct __packed pucan_wr_err_cnt {
/* uCAN SET_EN/CLR_DIS _OPTION command fields */
#define PUCAN_OPTION_ERROR 0x0001
#define PUCAN_OPTION_BUSLOAD 0x0002
#define PUCAN_OPTION_CANDFDISO 0x0004
struct __packed pucan_options {
__le16 opcode_channel;

31
drivers/net/can/usb/peak_usb/pcan_usb_fd.c
View file

@ -251,6 +251,27 @@ static int pcan_usb_fd_build_restart_cmd(struct peak_usb_device *dev, u8 *buf)
/* moves the pointer forward */
pc += sizeof(struct pucan_wr_err_cnt);
/* add command to switch from ISO to non-ISO mode, if fw allows it */
if (dev->can.ctrlmode_supported & CAN_CTRLMODE_FD_NON_ISO) {
struct pucan_options *puo = (struct pucan_options *)pc;
puo->opcode_channel =
(dev->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO) ?
pucan_cmd_opcode_channel(dev,
PUCAN_CMD_CLR_DIS_OPTION) :
pucan_cmd_opcode_channel(dev, PUCAN_CMD_SET_EN_OPTION);
puo->options = cpu_to_le16(PUCAN_OPTION_CANDFDISO);
/* to be sure that no other extended bits will be taken into
* account
*/
puo->unused = 0;
/* moves the pointer forward */
pc += sizeof(struct pucan_options);
}
/* next, go back to operational mode */
cmd = (struct pucan_command *)pc;
cmd->opcode_channel = pucan_cmd_opcode_channel(dev,
@ -860,8 +881,14 @@ static int pcan_usb_fd_init(struct peak_usb_device *dev)
pdev->usb_if->fw_info.fw_version[2],
dev->adapter->ctrl_count);
/* the currently supported hw is non-ISO */
dev->can.ctrlmode = CAN_CTRLMODE_FD_NON_ISO;
/* check for ability to switch between ISO/non-ISO modes */
if (pdev->usb_if->fw_info.fw_version[0] >= 2) {
/* firmware >= 2.x supports ISO/non-ISO switching */
dev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
} else {
/* firmware < 2.x only supports fixed(!) non-ISO */
dev->can.ctrlmode |= CAN_CTRLMODE_FD_NON_ISO;
}
/* tell the hardware the can driver is running */
err = pcan_usb_fd_drv_loaded(dev, 1);