diff options
| author | Matthias Fuchs <matthias.fuchs@esd.eu> | 2012-10-29 10:54:48 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2012-11-15 17:26:02 +0100 |
| commit | 7653ebd5f6a4cd1976cb82e8ef94ebbe3ff001f3 (patch) | |
| tree | 983c6a9e5abe9dec0414174766e73303094b7352 | |
| parent | a5f8f0e1a57025287697df78ce5e6b7d6b2b07b0 (diff) | |
can: usb: esd_usb2: Add support for CAN-USB/Micro
This patch extends the esd_usb2 driver to support the
tiny CAN-USB/Micro CAN/USB interface.
Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
| -rw-r--r-- | drivers/net/can/usb/esd_usb2.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c index f4317c0efed4..124e0dd3490c 100644 --- a/drivers/net/can/usb/esd_usb2.c +++ b/drivers/net/can/usb/esd_usb2.c @@ -1,7 +1,7 @@ /* - * CAN driver for esd CAN-USB/2 + * CAN driver for esd CAN-USB/2 and CAN-USB/Micro * - * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh + * Copyright (C) 2010-2012 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published @@ -28,14 +28,16 @@ #include <linux/can/error.h> MODULE_AUTHOR("Matthias Fuchs <matthias.fuchs@esd.eu>"); -MODULE_DESCRIPTION("CAN driver for esd CAN-USB/2 interfaces"); +MODULE_DESCRIPTION("CAN driver for esd CAN-USB/2 and CAN-USB/Micro interfaces"); MODULE_LICENSE("GPL v2"); /* Define these values to match your devices */ #define USB_ESDGMBH_VENDOR_ID 0x0ab4 #define USB_CANUSB2_PRODUCT_ID 0x0010 +#define USB_CANUSBM_PRODUCT_ID 0x0011 #define ESD_USB2_CAN_CLOCK 60000000 +#define ESD_USBM_CAN_CLOCK 36000000 #define ESD_USB2_MAX_NETS 2 /* USB2 commands */ @@ -69,6 +71,7 @@ MODULE_LICENSE("GPL v2"); #define ESD_USB2_TSEG2_SHIFT 20 #define ESD_USB2_SJW_MAX 4 #define ESD_USB2_SJW_SHIFT 14 +#define ESD_USBM_SJW_SHIFT 24 #define ESD_USB2_BRP_MIN 1 #define ESD_USB2_BRP_MAX 1024 #define ESD_USB2_BRP_INC 1 @@ -183,6 +186,7 @@ struct __attribute__ ((packed)) esd_usb2_msg { static struct usb_device_id esd_usb2_table[] = { {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSB2_PRODUCT_ID)}, + {USB_DEVICE(USB_ESDGMBH_VENDOR_ID, USB_CANUSBM_PRODUCT_ID)}, {} }; MODULE_DEVICE_TABLE(usb, esd_usb2_table); @@ -889,14 +893,22 @@ static int esd_usb2_set_bittiming(struct net_device *netdev) struct can_bittiming *bt = &priv->can.bittiming; struct esd_usb2_msg msg; u32 canbtr; + int sjw_shift; canbtr = ESD_USB2_UBR; if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) canbtr |= ESD_USB2_LOM; canbtr |= (bt->brp - 1) & (ESD_USB2_BRP_MAX - 1); + + if (le16_to_cpu(priv->usb2->udev->descriptor.idProduct) == + USB_CANUSBM_PRODUCT_ID) + sjw_shift = ESD_USBM_SJW_SHIFT; + else + sjw_shift = ESD_USB2_SJW_SHIFT; + canbtr |= ((bt->sjw - 1) & (ESD_USB2_SJW_MAX - 1)) - << ESD_USB2_SJW_SHIFT; + << sjw_shift; canbtr |= ((bt->prop_seg + bt->phase_seg1 - 1) & (ESD_USB2_TSEG1_MAX - 1)) << ESD_USB2_TSEG1_SHIFT; @@ -975,12 +987,19 @@ static int esd_usb2_probe_one_net(struct usb_interface *intf, int index) priv->can.state = CAN_STATE_STOPPED; priv->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY; - priv->can.clock.freq = ESD_USB2_CAN_CLOCK; + + if (le16_to_cpu(dev->udev->descriptor.idProduct) == + USB_CANUSBM_PRODUCT_ID) + priv->can.clock.freq = ESD_USBM_CAN_CLOCK; + else { + priv->can.clock.freq = ESD_USB2_CAN_CLOCK; + priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; + } + priv->can.bittiming_const = &esd_usb2_bittiming_const; priv->can.do_set_bittiming = esd_usb2_set_bittiming; priv->can.do_set_mode = esd_usb2_set_mode; priv->can.do_get_berr_counter = esd_usb2_get_berr_counter; - priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES; netdev->flags |= IFF_ECHO; /* we support local echo */ |