From 05ca5270005c18ec46decacef87992ea968f9fce Mon Sep 17 00:00:00 2001 From: Maximilian Schneider Date: Fri, 10 Jun 2016 20:39:22 +0000 Subject: [PATCH] can: gs_usb: add ethtool set_phys_id callback to locate physical device This patch Implements the ethtool set_phys_id callback to ease the locating of specific physical devices. Currently only supported on candleLight interfaces. Signed-off-by: Hubert Denkmair Signed-off-by: Maximilian Schneider [mkl: split codingstyle change sinto separate patch] Signed-off-by: Marc Kleine-Budde --- drivers/net/can/usb/gs_usb.c | 116 +++++++++++++++++++++++++---------- 1 file changed, 85 insertions(+), 31 deletions(-) diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index 6186a9436bb8..360764324c54 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -39,7 +39,9 @@ enum gs_usb_breq { GS_USB_BREQ_MODE, GS_USB_BREQ_BERR, GS_USB_BREQ_BT_CONST, - GS_USB_BREQ_DEVICE_CONFIG + GS_USB_BREQ_DEVICE_CONFIG, + GS_USB_BREQ_TIMESTAMP, + GS_USB_BREQ_IDENTIFY, }; enum gs_can_mode { @@ -58,6 +60,11 @@ enum gs_can_state { GS_CAN_STATE_SLEEPING }; +enum gs_can_identify_mode { + GS_CAN_IDENTIFY_OFF = 0, + GS_CAN_IDENTIFY_ON +}; + /* data types passed between host and device */ struct gs_host_config { u32 byte_order; @@ -101,10 +108,16 @@ struct gs_device_bittiming { u32 brp; } __packed; +struct gs_identify_mode { + u32 mode; +} __packed; + #define GS_CAN_FEATURE_LISTEN_ONLY BIT(0) #define GS_CAN_FEATURE_LOOP_BACK BIT(1) #define GS_CAN_FEATURE_TRIPLE_SAMPLE BIT(2) #define GS_CAN_FEATURE_ONE_SHOT BIT(3) +#define GS_CAN_FEATURE_HW_TIMESTAMP BIT(4) +#define GS_CAN_FEATURE_IDENTIFY BIT(5) struct gs_device_bt_const { u32 feature; @@ -724,7 +737,59 @@ static const struct net_device_ops gs_usb_netdev_ops = { .ndo_change_mtu = can_change_mtu, }; -static struct gs_can *gs_make_candev(unsigned int channel, struct usb_interface *intf) +static int gs_usb_set_identify(struct net_device *netdev, bool do_identify) +{ + struct gs_can *dev = netdev_priv(netdev); + struct gs_identify_mode imode; + int rc; + + if (do_identify) + imode.mode = GS_CAN_IDENTIFY_ON; + else + imode.mode = GS_CAN_IDENTIFY_OFF; + + rc = usb_control_msg(interface_to_usbdev(dev->iface), + usb_sndctrlpipe(interface_to_usbdev(dev->iface), + 0), + GS_USB_BREQ_IDENTIFY, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_INTERFACE, + dev->channel, + 0, + &imode, + sizeof(imode), + 100); + + return (rc > 0) ? 0 : rc; +} + +/* blink LED's for finding the this interface */ +static int gs_usb_set_phys_id(struct net_device *dev, + enum ethtool_phys_id_state state) +{ + int rc = 0; + + switch (state) { + case ETHTOOL_ID_ACTIVE: + rc = gs_usb_set_identify(dev, GS_CAN_IDENTIFY_ON); + break; + case ETHTOOL_ID_INACTIVE: + rc = gs_usb_set_identify(dev, GS_CAN_IDENTIFY_OFF); + break; + default: + break; + } + + return rc; +} + +static const struct ethtool_ops gs_usb_ethtool_ops = { + .set_phys_id = gs_usb_set_phys_id, +}; + +static struct gs_can *gs_make_candev(unsigned int channel, + struct usb_interface *intf, + struct gs_device_config *dconf) { struct gs_can *dev; struct net_device *netdev; @@ -812,10 +877,14 @@ static struct gs_can *gs_make_candev(unsigned int channel, struct usb_interface if (bt_const->feature & GS_CAN_FEATURE_ONE_SHOT) dev->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT; - kfree(bt_const); - SET_NETDEV_DEV(netdev, &intf->dev); + if (dconf->sw_version > 1) + if (bt_const->feature & GS_CAN_FEATURE_IDENTIFY) + netdev->ethtool_ops = &gs_usb_ethtool_ops; + + kfree(bt_const); + rc = register_candev(dev->netdev); if (rc) { free_candev(dev->netdev); @@ -833,19 +902,16 @@ static void gs_destroy_candev(struct gs_can *dev) free_candev(dev->netdev); } -static int gs_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) +static int gs_usb_probe(struct usb_interface *intf, + const struct usb_device_id *id) { struct gs_usb *dev; int rc = -ENOMEM; unsigned int icount, i; - struct gs_host_config *hconf; - struct gs_device_config *dconf; - - hconf = kmalloc(sizeof(*hconf), GFP_KERNEL); - if (!hconf) - return -ENOMEM; - - hconf->byte_order = 0x0000beef; + struct gs_host_config hconf = { + .byte_order = 0x0000beef, + }; + struct gs_device_config dconf; /* send host config */ rc = usb_control_msg(interface_to_usbdev(intf), @@ -854,22 +920,16 @@ static int gs_usb_probe(struct usb_interface *intf, const struct usb_device_id * USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, 1, intf->altsetting[0].desc.bInterfaceNumber, - hconf, - sizeof(*hconf), + &hconf, + sizeof(hconf), 1000); - kfree(hconf); - if (rc < 0) { dev_err(&intf->dev, "Couldn't send data format (err=%d)\n", rc); return rc; } - dconf = kmalloc(sizeof(*dconf), GFP_KERNEL); - if (!dconf) - return -ENOMEM; - /* read device config */ rc = usb_control_msg(interface_to_usbdev(intf), usb_rcvctrlpipe(interface_to_usbdev(intf), 0), @@ -877,22 +937,16 @@ static int gs_usb_probe(struct usb_interface *intf, const struct usb_device_id * USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, 1, intf->altsetting[0].desc.bInterfaceNumber, - dconf, - sizeof(*dconf), + &dconf, + sizeof(dconf), 1000); if (rc < 0) { dev_err(&intf->dev, "Couldn't get device config: (err=%d)\n", rc); - - kfree(dconf); - return rc; } - icount = dconf->icount+1; - - kfree(dconf); - + icount = dconf.icount + 1; dev_info(&intf->dev, "Configuring for %d interfaces\n", icount); if (icount > GS_MAX_INTF) { @@ -913,7 +967,7 @@ static int gs_usb_probe(struct usb_interface *intf, const struct usb_device_id * dev->udev = interface_to_usbdev(intf); for (i = 0; i < icount; i++) { - dev->canch[i] = gs_make_candev(i, intf); + dev->canch[i] = gs_make_candev(i, intf, &dconf); if (IS_ERR_OR_NULL(dev->canch[i])) { /* save error code to return later */ rc = PTR_ERR(dev->canch[i]); -- 2.39.5