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can: usb: esd_usb2: Add support for CAN-USB/Micro

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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>
This commit is contained in:
Matthias Fuchs 2012-10-29 10:54:48 +01:00 committed by Marc Kleine-Budde
parent a5f8f0e1a5
commit 7653ebd5f6
1 changed files with 25 additions and 6 deletions
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31
drivers/net/can/usb/esd_usb2.c
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@ -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 */