struct net_device *alloc_inicandev(int sizeof_priv)
{
struct net_device *dev;
struct inican_priv *priv;
dev = alloc_candev(sizeof_priv);
if(!dev)
return NULL;
priv = netdev_priv(dev);
dev->open = inican_open;
dev->stop = inican_stop;
dev->hard_start_xmit = inican_hard_start_xmit;
dev->tx_timeout = inican_tx_timeout;
priv->can.baudrate = 500000;
priv->can.do_set_bit_time = inican_set_bit_time;
priv->can.do_get_state = inican_get_state;
priv->can.do_set_mode = inican_set_mode;
priv->dev = dev;
priv->tx_object = 0;
return dev;
}
struct net_device *alloc_c_can_dev(void)
{
struct net_device *dev;
struct c_can_priv *priv;
dev = alloc_candev(sizeof(struct c_can_priv), C_CAN_MSG_OBJ_TX_NUM);
if (!dev)
return NULL;
priv = netdev_priv(dev);
netif_napi_add(dev, &priv->napi, c_can_poll, C_CAN_NAPI_WEIGHT);
priv->dev = dev;
priv->can.bittiming_const = &c_can_bittiming_const;
priv->can.do_set_mode = c_can_set_mode;
priv->can.do_get_berr_counter = c_can_get_berr_counter;
priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
CAN_CTRLMODE_LISTENONLY |
CAN_CTRLMODE_BERR_REPORTING;
return dev;
}
/* Send close command to device */
static int usb_8dev_cmd_close(struct usb_8dev_priv *priv)
{
struct usb_8dev_cmd_msg inmsg;
struct usb_8dev_cmd_msg outmsg = {
.channel = 0,
.command = USB_8DEV_CLOSE,
.opt1 = 0,
.opt2 = 0
};
return usb_8dev_send_cmd(priv, &outmsg, &inmsg);
}
/* Get firmware and hardware version */
static int usb_8dev_cmd_version(struct usb_8dev_priv *priv, u32 *res)
{
struct usb_8dev_cmd_msg inmsg;
struct usb_8dev_cmd_msg outmsg = {
.channel = 0,
.command = USB_8DEV_GET_SOFTW_HARDW_VER,
.opt1 = 0,
.opt2 = 0
};
int err = usb_8dev_send_cmd(priv, &outmsg, &inmsg);
if (err)
return err;
*res = be32_to_cpup((__be32 *)inmsg.data);
return err;
}
/* Set network device mode
*
* Maybe we should leave this function empty, because the device
* set mode variable with open command.
*/
static int usb_8dev_set_mode(struct net_device *netdev, enum can_mode mode)
{
struct usb_8dev_priv *priv = netdev_priv(netdev);
int err = 0;
switch (mode) {
case CAN_MODE_START:
err = usb_8dev_cmd_open(priv);
if (err)
netdev_warn(netdev, "couldn't start device");
break;
default:
return -EOPNOTSUPP;
}
return err;
}
/* Read error/status frames */
static void usb_8dev_rx_err_msg(struct usb_8dev_priv *priv,
struct usb_8dev_rx_msg *msg)
{
struct can_frame *cf;
struct sk_buff *skb;
struct net_device_stats *stats = &priv->netdev->stats;
/* Error message:
* byte 0: Status
* byte 1: bit 7: Receive Passive
* byte 1: bit 0-6: Receive Error Counter
* byte 2: Transmit Error Counter
* byte 3: Always 0 (maybe reserved for future use)
*/
u8 state = msg->data[0];
u8 rxerr = msg->data[1] & USB_8DEV_RP_MASK;
u8 txerr = msg->data[2];
int rx_errors = 0;
int tx_errors = 0;
skb = alloc_can_err_skb(priv->netdev, &cf);
if (!skb)
return;
switch (state) {
case USB_8DEV_STATUSMSG_OK:
priv->can.state = CAN_STATE_ERROR_ACTIVE;
cf->can_id |= CAN_ERR_PROT;
cf->data[2] = CAN_ERR_PROT_ACTIVE;
break;
case USB_8DEV_STATUSMSG_BUSOFF:
priv->can.state = CAN_STATE_BUS_OFF;
cf->can_id |= CAN_ERR_BUSOFF;
can_bus_off(priv->netdev);
break;
case USB_8DEV_STATUSMSG_OVERRUN:
case USB_8DEV_STATUSMSG_BUSLIGHT:
case USB_8DEV_STATUSMSG_BUSHEAVY:
cf->can_id |= CAN_ERR_CRTL;
break;
default:
priv->can.state = CAN_STATE_ERROR_WARNING;
cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
priv->can.can_stats.bus_error++;
break;
}
switch (state) {
case USB_8DEV_STATUSMSG_OK:
case USB_8DEV_STATUSMSG_BUSOFF:
break;
case USB_8DEV_STATUSMSG_ACK:
cf->can_id |= CAN_ERR_ACK;
tx_errors = 1;
break;
case USB_8DEV_STATUSMSG_CRC:
cf->data[2] |= CAN_ERR_PROT_UNSPEC;
cf->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ |
CAN_ERR_PROT_LOC_CRC_DEL;
rx_errors = 1;
break;
case USB_8DEV_STATUSMSG_BIT0:
cf->data[2] |= CAN_ERR_PROT_BIT0;
tx_errors = 1;
break;
case USB_8DEV_STATUSMSG_BIT1:
cf->data[2] |= CAN_ERR_PROT_BIT1;
tx_errors = 1;
break;
case USB_8DEV_STATUSMSG_FORM:
cf->data[2] |= CAN_ERR_PROT_FORM;
rx_errors = 1;
break;
case USB_8DEV_STATUSMSG_STUFF:
cf->data[2] |= CAN_ERR_PROT_STUFF;
rx_errors = 1;
break;
case USB_8DEV_STATUSMSG_OVERRUN:
cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
stats->rx_over_errors++;
rx_errors = 1;
break;
case USB_8DEV_STATUSMSG_BUSLIGHT:
priv->can.state = CAN_STATE_ERROR_WARNING;
cf->data[1] = (txerr > rxerr) ?
CAN_ERR_CRTL_TX_WARNING :
CAN_ERR_CRTL_RX_WARNING;
priv->can.can_stats.error_warning++;
break;
case USB_8DEV_STATUSMSG_BUSHEAVY:
priv->can.state = CAN_STATE_ERROR_PASSIVE;
cf->data[1] = (txerr > rxerr) ?
CAN_ERR_CRTL_TX_PASSIVE :
CAN_ERR_CRTL_RX_PASSIVE;
priv->can.can_stats.error_passive++;
break;
default:
netdev_warn(priv->netdev,
"Unknown status/error message (%d)\n", state);
break;
}
if (tx_errors) {
cf->data[2] |= CAN_ERR_PROT_TX;
stats->tx_errors++;
}
if (rx_errors)
stats->rx_errors++;
cf->data[6] = txerr;
cf->data[7] = rxerr;
priv->bec.txerr = txerr;
priv->bec.rxerr = rxerr;
netif_rx(skb);
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
}
/* Read data and status frames */
static void usb_8dev_rx_can_msg(struct usb_8dev_priv *priv,
struct usb_8dev_rx_msg *msg)
{
struct can_frame *cf;
struct sk_buff *skb;
struct net_device_stats *stats = &priv->netdev->stats;
if (msg->type == USB_8DEV_TYPE_ERROR_FRAME &&
msg->flags == USB_8DEV_ERR_FLAG) {
usb_8dev_rx_err_msg(priv, msg);
} else if (msg->type == USB_8DEV_TYPE_CAN_FRAME) {
skb = alloc_can_skb(priv->netdev, &cf);
if (!skb)
return;
cf->can_id = be32_to_cpu(msg->id);
cf->can_dlc = get_can_dlc(msg->dlc & 0xF);
if (msg->flags & USB_8DEV_EXTID)
cf->can_id |= CAN_EFF_FLAG;
if (msg->flags & USB_8DEV_RTR)
cf->can_id |= CAN_RTR_FLAG;
else
memcpy(cf->data, msg->data, cf->can_dlc);
netif_rx(skb);
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
can_led_event(priv->netdev, CAN_LED_EVENT_RX);
} else {
netdev_warn(priv->netdev, "frame type %d unknown",
msg->type);
}
}
/* Callback for reading data from device
*
* Check urb status, call read function and resubmit urb read operation.
*/
static void usb_8dev_read_bulk_callback(struct urb *urb)
{
struct usb_8dev_priv *priv = urb->context;
struct net_device *netdev;
int retval;
int pos = 0;
netdev = priv->netdev;
if (!netif_device_present(netdev))
return;
switch (urb->status) {
case 0: /* success */
break;
case -ENOENT:
case -ESHUTDOWN:
return;
default:
netdev_info(netdev, "Rx URB aborted (%d)\n",
urb->status);
goto resubmit_urb;
}
while (pos < urb->actual_length) {
struct usb_8dev_rx_msg *msg;
if (pos + sizeof(struct usb_8dev_rx_msg) > urb->actual_length) {
netdev_err(priv->netdev, "format error\n");
break;
}
msg = (struct usb_8dev_rx_msg *)(urb->transfer_buffer + pos);
usb_8dev_rx_can_msg(priv, msg);
pos += sizeof(struct usb_8dev_rx_msg);
}
resubmit_urb:
usb_fill_bulk_urb(urb, priv->udev,
usb_rcvbulkpipe(priv->udev, USB_8DEV_ENDP_DATA_RX),
urb->transfer_buffer, RX_BUFFER_SIZE,
usb_8dev_read_bulk_callback, priv);
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval == -ENODEV)
netif_device_detach(netdev);
else if (retval)
netdev_err(netdev,
"failed resubmitting read bulk urb: %d\n", retval);
}
/* Callback handler for write operations
*
* Free allocated buffers, check transmit status and
* calculate statistic.
*/
static void usb_8dev_write_bulk_callback(struct urb *urb)
{
struct usb_8dev_tx_urb_context *context = urb->context;
struct usb_8dev_priv *priv;
struct net_device *netdev;
BUG_ON(!context);
priv = context->priv;
netdev = priv->netdev;
/* free up our allocated buffer */
usb_free_coherent(urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
atomic_dec(&priv->active_tx_urbs);
if (!netif_device_present(netdev))
return;
if (urb->status)
netdev_info(netdev, "Tx URB aborted (%d)\n",
urb->status);
netdev->stats.tx_packets++;
netdev->stats.tx_bytes += context->dlc;
can_get_echo_skb(netdev, context->echo_index);
can_led_event(netdev, CAN_LED_EVENT_TX);
/* Release context */
context->echo_index = MAX_TX_URBS;
netif_wake_queue(netdev);
}
/* Send data to device */
static netdev_tx_t usb_8dev_start_xmit(struct sk_buff *skb,
struct net_device *netdev)
{
struct usb_8dev_priv *priv = netdev_priv(netdev);
struct net_device_stats *stats = &netdev->stats;
struct can_frame *cf = (struct can_frame *) skb->data;
struct usb_8dev_tx_msg *msg;
struct urb *urb;
struct usb_8dev_tx_urb_context *context = NULL;
u8 *buf;
int i, err;
size_t size = sizeof(struct usb_8dev_tx_msg);
if (can_dropped_invalid_skb(netdev, skb))
return NETDEV_TX_OK;
/* create a URB, and a buffer for it, and copy the data to the URB */
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
netdev_err(netdev, "No memory left for URBs\n");
goto nomem;
}
buf = usb_alloc_coherent(priv->udev, size, GFP_ATOMIC,
&urb->transfer_dma);
if (!buf) {
netdev_err(netdev, "No memory left for USB buffer\n");
goto nomembuf;
}
memset(buf, 0, size);
msg = (struct usb_8dev_tx_msg *)buf;
msg->begin = USB_8DEV_DATA_START;
msg->flags = 0x00;
if (cf->can_id & CAN_RTR_FLAG)
msg->flags |= USB_8DEV_RTR;
if (cf->can_id & CAN_EFF_FLAG)
msg->flags |= USB_8DEV_EXTID;
msg->id = cpu_to_be32(cf->can_id & CAN_ERR_MASK);
msg->dlc = cf->can_dlc;
memcpy(msg->data, cf->data, cf->can_dlc);
msg->end = USB_8DEV_DATA_END;
for (i = 0; i < MAX_TX_URBS; i++) {
if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) {
context = &priv->tx_contexts[i];
break;
}
}
/* May never happen! When this happens we'd more URBs in flight as
* allowed (MAX_TX_URBS).
*/
if (!context)
goto nofreecontext;
context->priv = priv;
context->echo_index = i;
context->dlc = cf->can_dlc;
usb_fill_bulk_urb(urb, priv->udev,
usb_sndbulkpipe(priv->udev, USB_8DEV_ENDP_DATA_TX),
buf, size, usb_8dev_write_bulk_callback, context);
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_anchor_urb(urb, &priv->tx_submitted);
can_put_echo_skb(skb, netdev, context->echo_index);
atomic_inc(&priv->active_tx_urbs);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(err))
goto failed;
else if (atomic_read(&priv->active_tx_urbs) >= MAX_TX_URBS)
/* Slow down tx path */
netif_stop_queue(netdev);
/* Release our reference to this URB, the USB core will eventually free
* it entirely.
*/
usb_free_urb(urb);
return NETDEV_TX_OK;
nofreecontext:
usb_free_coherent(priv->udev, size, buf, urb->transfer_dma);
usb_free_urb(urb);
netdev_warn(netdev, "couldn't find free context");
return NETDEV_TX_BUSY;
failed:
can_free_echo_skb(netdev, context->echo_index);
usb_unanchor_urb(urb);
usb_free_coherent(priv->udev, size, buf, urb->transfer_dma);
atomic_dec(&priv->active_tx_urbs);
if (err == -ENODEV)
netif_device_detach(netdev);
else
netdev_warn(netdev, "failed tx_urb %d\n", err);
nomembuf:
usb_free_urb(urb);
nomem:
dev_kfree_skb(skb);
stats->tx_dropped++;
return NETDEV_TX_OK;
}
static int usb_8dev_get_berr_counter(const struct net_device *netdev,
struct can_berr_counter *bec)
{
struct usb_8dev_priv *priv = netdev_priv(netdev);
bec->txerr = priv->bec.txerr;
bec->rxerr = priv->bec.rxerr;
return 0;
}
/* Start USB device */
static int usb_8dev_start(struct usb_8dev_priv *priv)
{
struct net_device *netdev = priv->netdev;
int err, i;
for (i = 0; i < MAX_RX_URBS; i++) {
struct urb *urb = NULL;
u8 *buf;
/* create a URB, and a buffer for it */
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
netdev_err(netdev, "No memory left for URBs\n");
err = -ENOMEM;
break;
}
buf = usb_alloc_coherent(priv->udev, RX_BUFFER_SIZE, GFP_KERNEL,
&urb->transfer_dma);
if (!buf) {
netdev_err(netdev, "No memory left for USB buffer\n");
usb_free_urb(urb);
err = -ENOMEM;
break;
}
usb_fill_bulk_urb(urb, priv->udev,
usb_rcvbulkpipe(priv->udev,
USB_8DEV_ENDP_DATA_RX),
buf, RX_BUFFER_SIZE,
usb_8dev_read_bulk_callback, priv);
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_anchor_urb(urb, &priv->rx_submitted);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err) {
usb_unanchor_urb(urb);
usb_free_coherent(priv->udev, RX_BUFFER_SIZE, buf,
urb->transfer_dma);
usb_free_urb(urb);
break;
}
/* Drop reference, USB core will take care of freeing it */
usb_free_urb(urb);
}
/* Did we submit any URBs */
if (i == 0) {
netdev_warn(netdev, "couldn't setup read URBs\n");
return err;
}
/* Warn if we've couldn't transmit all the URBs */
if (i < MAX_RX_URBS)
netdev_warn(netdev, "rx performance may be slow\n");
err = usb_8dev_cmd_open(priv);
if (err)
goto failed;
priv->can.state = CAN_STATE_ERROR_ACTIVE;
return 0;
failed:
if (err == -ENODEV)
netif_device_detach(priv->netdev);
netdev_warn(netdev, "couldn't submit control: %d\n", err);
return err;
}
/* Open USB device */
static int usb_8dev_open(struct net_device *netdev)
{
struct usb_8dev_priv *priv = netdev_priv(netdev);
int err;
/* common open */
err = open_candev(netdev);
if (err)
return err;
can_led_event(netdev, CAN_LED_EVENT_OPEN);
/* finally start device */
err = usb_8dev_start(priv);
if (err) {
if (err == -ENODEV)
netif_device_detach(priv->netdev);
netdev_warn(netdev, "couldn't start device: %d\n",
err);
close_candev(netdev);
return err;
}
netif_start_queue(netdev);
return 0;
}
static void unlink_all_urbs(struct usb_8dev_priv *priv)
{
int i;
usb_kill_anchored_urbs(&priv->rx_submitted);
usb_kill_anchored_urbs(&priv->tx_submitted);
atomic_set(&priv->active_tx_urbs, 0);
for (i = 0; i < MAX_TX_URBS; i++)
priv->tx_contexts[i].echo_index = MAX_TX_URBS;
}
/* Close USB device */
static int usb_8dev_close(struct net_device *netdev)
{
struct usb_8dev_priv *priv = netdev_priv(netdev);
int err = 0;
/* Send CLOSE command to CAN controller */
err = usb_8dev_cmd_close(priv);
if (err)
netdev_warn(netdev, "couldn't stop device");
priv->can.state = CAN_STATE_STOPPED;
netif_stop_queue(netdev);
/* Stop polling */
unlink_all_urbs(priv);
close_candev(netdev);
can_led_event(netdev, CAN_LED_EVENT_STOP);
return err;
}
static const struct net_device_ops usb_8dev_netdev_ops = {
.ndo_open = usb_8dev_open,
.ndo_stop = usb_8dev_close,
.ndo_start_xmit = usb_8dev_start_xmit,
.ndo_change_mtu = can_change_mtu,
};
static const struct can_bittiming_const usb_8dev_bittiming_const = {
.name = "usb_8dev",
.tseg1_min = 1,
.tseg1_max = 16,
.tseg2_min = 1,
.tseg2_max = 8,
.sjw_max = 4,
.brp_min = 1,
.brp_max = 1024,
.brp_inc = 1,
};
/* Probe USB device
*
* Check device and firmware.
* Set supported modes and bittiming constants.
* Allocate some memory.
*/
static int usb_8dev_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct net_device *netdev;
struct usb_8dev_priv *priv;
int i, err = -ENOMEM;
u32 version;
char buf[18];
struct usb_device *usbdev = interface_to_usbdev(intf);
/* product id looks strange, better we also check iProduct string */
if (usb_string(usbdev, usbdev->descriptor.iProduct, buf,
sizeof(buf)) > 0 && strcmp(buf, "USB2CAN converter")) {
dev_info(&usbdev->dev, "ignoring: not an USB2CAN converter\n");
return -ENODEV;
}
netdev = alloc_candev(sizeof(struct usb_8dev_priv), MAX_TX_URBS);
if (!netdev) {
dev_err(&intf->dev, "Couldn't alloc candev\n");
return -ENOMEM;
}
priv = netdev_priv(netdev);
priv->udev = usbdev;
priv->netdev = netdev;
priv->can.state = CAN_STATE_STOPPED;
priv->can.clock.freq = USB_8DEV_ABP_CLOCK;
priv->can.bittiming_const = &usb_8dev_bittiming_const;
priv->can.do_set_mode = usb_8dev_set_mode;
priv->can.do_get_berr_counter = usb_8dev_get_berr_counter;
priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
CAN_CTRLMODE_LISTENONLY |
CAN_CTRLMODE_ONE_SHOT;
netdev->netdev_ops = &usb_8dev_netdev_ops;
netdev->flags |= IFF_ECHO; /* we support local echo */
init_usb_anchor(&priv->rx_submitted);
init_usb_anchor(&priv->tx_submitted);
atomic_set(&priv->active_tx_urbs, 0);
for (i = 0; i < MAX_TX_URBS; i++)
priv->tx_contexts[i].echo_index = MAX_TX_URBS;
priv->cmd_msg_buffer = kzalloc(sizeof(struct usb_8dev_cmd_msg),
GFP_KERNEL);
if (!priv->cmd_msg_buffer)
goto cleanup_candev;
usb_set_intfdata(intf, priv);
SET_NETDEV_DEV(netdev, &intf->dev);
mutex_init(&priv->usb_8dev_cmd_lock);
err = register_candev(netdev);
if (err) {
netdev_err(netdev,
"couldn't register CAN device: %d\n", err);
goto cleanup_cmd_msg_buffer;
}
err = usb_8dev_cmd_version(priv, &version);
if (err) {
netdev_err(netdev, "can't get firmware version\n");
goto cleanup_unregister_candev;
} else {
netdev_info(netdev,
"firmware: %d.%d, hardware: %d.%d\n",
(version>>24) & 0xff, (version>>16) & 0xff,
(version>>8) & 0xff, version & 0xff);
}
devm_can_led_init(netdev);
return 0;
cleanup_unregister_candev:
unregister_netdev(priv->netdev);
cleanup_cmd_msg_buffer:
kfree(priv->cmd_msg_buffer);
cleanup_candev:
free_candev(netdev);
return err;
}
/* Called by the usb core when driver is unloaded or device is removed */
static void usb_8dev_disconnect(struct usb_interface *intf)
{
struct usb_8dev_priv *priv = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (priv) {
netdev_info(priv->netdev, "device disconnected\n");
unregister_netdev(priv->netdev);
free_candev(priv->netdev);
unlink_all_urbs(priv);
}
}
static struct usb_driver usb_8dev_driver = {
.name = "usb_8dev",
.probe = usb_8dev_probe,
.disconnect = usb_8dev_disconnect,
.id_table = usb_8dev_table,
};
module_usb_driver(usb_8dev_driver);
MODULE_AUTHOR("Bernd Krumboeck <*****@*****.**>");
MODULE_DESCRIPTION("CAN driver for 8 devices USB2CAN interfaces");
MODULE_LICENSE("GPL v2");
static int ti_hecc_probe(struct platform_device *pdev)
{
struct net_device *ndev = (struct net_device *)0;
struct ti_hecc_priv *priv;
struct ti_hecc_platform_data *pdata;
struct resource *mem, *irq;
void __iomem *addr;
int err = -ENODEV;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "No platform data\n");
goto probe_exit;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "No mem resources\n");
goto probe_exit;
}
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "No irq resource\n");
goto probe_exit;
}
if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
dev_err(&pdev->dev, "HECC region already claimed\n");
err = -EBUSY;
goto probe_exit;
}
addr = ioremap(mem->start, resource_size(mem));
if (!addr) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -ENOMEM;
goto probe_exit_free_region;
}
ndev = alloc_candev(sizeof(struct ti_hecc_priv), HECC_MAX_TX_MBOX);
if (!ndev) {
dev_err(&pdev->dev, "alloc_candev failed\n");
err = -ENOMEM;
goto probe_exit_iounmap;
}
priv = netdev_priv(ndev);
priv->ndev = ndev;
priv->base = addr;
priv->scc_ram_offset = pdata->scc_ram_offset;
priv->hecc_ram_offset = pdata->hecc_ram_offset;
priv->mbx_offset = pdata->mbx_offset;
priv->int_line = pdata->int_line;
priv->transceiver_switch = pdata->transceiver_switch;
priv->can.bittiming_const = &ti_hecc_bittiming_const;
priv->can.do_set_mode = ti_hecc_do_set_mode;
priv->can.do_get_state = ti_hecc_get_state;
priv->can.do_get_berr_counter = ti_hecc_get_berr_counter;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
spin_lock_init(&priv->mbx_lock);
ndev->irq = irq->start;
ndev->flags |= IFF_ECHO;
platform_set_drvdata(pdev, ndev);
SET_NETDEV_DEV(ndev, &pdev->dev);
ndev->netdev_ops = &ti_hecc_netdev_ops;
priv->clk = clk_get(&pdev->dev, "hecc_ck");
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "No clock available\n");
err = PTR_ERR(priv->clk);
priv->clk = NULL;
goto probe_exit_candev;
}
priv->can.clock.freq = clk_get_rate(priv->clk);
netif_napi_add(ndev, &priv->napi, ti_hecc_rx_poll,
HECC_DEF_NAPI_WEIGHT);
clk_enable(priv->clk);
err = register_candev(ndev);
if (err) {
dev_err(&pdev->dev, "register_candev() failed\n");
goto probe_exit_clk;
}
dev_info(&pdev->dev, "device registered (reg_base=%p, irq=%u)\n",
priv->base, (u32) ndev->irq);
return 0;
probe_exit_clk:
clk_put(priv->clk);
probe_exit_candev:
free_candev(ndev);
probe_exit_iounmap:
iounmap(addr);
probe_exit_free_region:
release_mem_region(mem->start, resource_size(mem));
probe_exit:
return err;
}
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;
int rc;
struct gs_device_bt_const *bt_const;
bt_const = kmalloc(sizeof(*bt_const), GFP_KERNEL);
if (!bt_const)
return ERR_PTR(-ENOMEM);
/* fetch bit timing constants */
rc = usb_control_msg(interface_to_usbdev(intf),
usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
GS_USB_BREQ_BT_CONST,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
channel,
0,
bt_const,
sizeof(*bt_const),
1000);
if (rc < 0) {
dev_err(&intf->dev,
"Couldn't get bit timing const for channel (err=%d)\n",
rc);
kfree(bt_const);
return ERR_PTR(rc);
}
/* create netdev */
netdev = alloc_candev(sizeof(struct gs_can), GS_MAX_TX_URBS);
if (!netdev) {
dev_err(&intf->dev, "Couldn't allocate candev\n");
kfree(bt_const);
return ERR_PTR(-ENOMEM);
}
dev = netdev_priv(netdev);
netdev->netdev_ops = &gs_usb_netdev_ops;
netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */
/* dev settup */
strcpy(dev->bt_const.name, "gs_usb");
dev->bt_const.tseg1_min = bt_const->tseg1_min;
dev->bt_const.tseg1_max = bt_const->tseg1_max;
dev->bt_const.tseg2_min = bt_const->tseg2_min;
dev->bt_const.tseg2_max = bt_const->tseg2_max;
dev->bt_const.sjw_max = bt_const->sjw_max;
dev->bt_const.brp_min = bt_const->brp_min;
dev->bt_const.brp_max = bt_const->brp_max;
dev->bt_const.brp_inc = bt_const->brp_inc;
dev->udev = interface_to_usbdev(intf);
dev->iface = intf;
dev->netdev = netdev;
dev->channel = channel;
init_usb_anchor(&dev->tx_submitted);
atomic_set(&dev->active_tx_urbs, 0);
spin_lock_init(&dev->tx_ctx_lock);
for (rc = 0; rc < GS_MAX_TX_URBS; rc++) {
dev->tx_context[rc].dev = dev;
dev->tx_context[rc].echo_id = GS_MAX_TX_URBS;
}
/* can settup */
dev->can.state = CAN_STATE_STOPPED;
dev->can.clock.freq = bt_const->fclk_can;
dev->can.bittiming_const = &dev->bt_const;
dev->can.do_set_bittiming = gs_usb_set_bittiming;
dev->can.ctrlmode_supported = 0;
if (bt_const->feature & GS_CAN_FEATURE_LISTEN_ONLY)
dev->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
if (bt_const->feature & GS_CAN_FEATURE_LOOP_BACK)
dev->can.ctrlmode_supported |= CAN_CTRLMODE_LOOPBACK;
if (bt_const->feature & GS_CAN_FEATURE_TRIPLE_SAMPLE)
dev->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
if (bt_const->feature & GS_CAN_FEATURE_ONE_SHOT)
dev->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT;
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);
dev_err(&intf->dev, "Couldn't register candev (err=%d)\n", rc);
return ERR_PTR(rc);
}
return dev;
}
/*
* probe function for new CPC-USB devices
*/
static int ems_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct net_device *netdev;
struct ems_usb *dev;
int i, err = -ENOMEM;
netdev = alloc_candev(sizeof(struct ems_usb), MAX_TX_URBS);
if (!netdev) {
dev_err(&intf->dev, "ems_usb: Couldn't alloc candev\n");
return -ENOMEM;
}
dev = netdev_priv(netdev);
dev->udev = interface_to_usbdev(intf);
dev->netdev = netdev;
dev->can.state = CAN_STATE_STOPPED;
dev->can.clock.freq = EMS_USB_ARM7_CLOCK;
dev->can.bittiming_const = &ems_usb_bittiming_const;
dev->can.do_set_bittiming = ems_usb_set_bittiming;
dev->can.do_set_mode = ems_usb_set_mode;
dev->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
netdev->netdev_ops = &ems_usb_netdev_ops;
netdev->flags |= IFF_ECHO; /* we support local echo */
init_usb_anchor(&dev->rx_submitted);
init_usb_anchor(&dev->tx_submitted);
atomic_set(&dev->active_tx_urbs, 0);
for (i = 0; i < MAX_TX_URBS; i++)
dev->tx_contexts[i].echo_index = MAX_TX_URBS;
dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->intr_urb) {
dev_err(&intf->dev, "Couldn't alloc intr URB\n");
goto cleanup_candev;
}
dev->intr_in_buffer = kzalloc(INTR_IN_BUFFER_SIZE, GFP_KERNEL);
if (!dev->intr_in_buffer)
goto cleanup_intr_urb;
dev->tx_msg_buffer = kzalloc(CPC_HEADER_SIZE +
sizeof(struct ems_cpc_msg), GFP_KERNEL);
if (!dev->tx_msg_buffer)
goto cleanup_intr_in_buffer;
usb_set_intfdata(intf, dev);
SET_NETDEV_DEV(netdev, &intf->dev);
init_params_sja1000(&dev->active_params);
err = ems_usb_command_msg(dev, &dev->active_params);
if (err) {
netdev_err(netdev, "couldn't initialize controller: %d\n", err);
goto cleanup_tx_msg_buffer;
}
err = register_candev(netdev);
if (err) {
netdev_err(netdev, "couldn't register CAN device: %d\n", err);
goto cleanup_tx_msg_buffer;
}
return 0;
cleanup_tx_msg_buffer:
kfree(dev->tx_msg_buffer);
cleanup_intr_in_buffer:
kfree(dev->intr_in_buffer);
cleanup_intr_urb:
usb_free_urb(dev->intr_urb);
cleanup_candev:
free_candev(netdev);
return err;
}
static int __devinit omapl_pru_can_probe(struct platform_device *pdev)
{
struct net_device *ndev = NULL;
struct omapl_pru_can_priv *priv = NULL;
struct ti_pru_can_platform_data *pdata;
struct resource *res_mem, *trx_irq;
pru_can_firmware_structure fw_pru;
u32 err, retries = 0;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data provided for pru!\n");
return -ENODEV;
}
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res_mem) {
dev_err(&pdev->dev, "unable to get pru memory resources!\n");
err = -ENODEV;
goto probe_exit;
}
trx_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!trx_irq) {
dev_err(&pdev->dev, "unable to get pru interrupt resources!\n");
err = -ENODEV;
goto probe_exit;
}
if (!request_mem_region(res_mem->start, resource_size(res_mem),
dev_name(&pdev->dev))) {
dev_err(&pdev->dev, "pru memory region already claimed!\n");
err = -EBUSY;
goto probe_exit;
}
ndev = alloc_candev(sizeof(struct omapl_pru_can_priv), MB_MAX + 1);
if (!ndev) {
dev_err(&pdev->dev, "alloc_candev failed\n");
err = -ENOMEM;
goto probe_exit_free_region;
}
priv = netdev_priv(ndev);
priv->pru_arm_iomap.pru_io_addr =
ioremap(res_mem->start, resource_size(res_mem));
if (!priv->pru_arm_iomap.pru_io_addr) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -ENOMEM;
goto probe_exit_free_region;
}
priv->pru_arm_iomap.psc0_io_addr = IO_ADDRESS(DA8XX_PSC0_BASE);
if (!priv->pru_arm_iomap.psc0_io_addr) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -ENOMEM;
goto probe_exit_iounmap;
}
priv->pru_arm_iomap.psc1_io_addr = IO_ADDRESS(DA8XX_PSC1_BASE);
if (!priv->pru_arm_iomap.psc1_io_addr) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -ENOMEM;
goto probe_exit_iounmap;
}
priv->pru_arm_iomap.syscfg_io_addr = IO_ADDRESS(DA8XX_SYSCFG0_BASE);
if (!priv->pru_arm_iomap.syscfg_io_addr) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -ENOMEM;
goto probe_exit_iounmap;
}
priv->ndev = ndev;
priv->trx_irq = trx_irq->start;
priv->can.bittiming_const = NULL;
priv->can.do_set_bittiming = omapl_pru_can_set_bittiming;
priv->can.do_set_mode = omapl_pru_can_set_mode;
priv->can.do_get_state = omapl_pru_can_get_state;
priv->can_tx_hndl.u8prunumber = CAN_TX_PRU_1;
priv->can_rx_hndl.u8prunumber = CAN_RX_PRU_0;
ndev->flags |= (IFF_ECHO | IFF_NOARP); /* we support local echo, no arp */
platform_set_drvdata(pdev, ndev);
SET_NETDEV_DEV(ndev, &pdev->dev);
ndev->netdev_ops = &omapl_pru_can_netdev_ops;
priv->clk = clk_get(&pdev->dev, "pru_ck");
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "no clock available\n");
err = PTR_ERR(priv->clk);
priv->clk = NULL;
goto probe_exit_candev;
}
priv->can.clock.freq = clk_get_rate(priv->clk);
priv->clk_timer = clk_get(&pdev->dev, "pll1_sysclk2");
if (IS_ERR(priv->clk_timer)) {
dev_err(&pdev->dev, "no timer clock available\n");
err = PTR_ERR(priv->clk_timer);
priv->clk_timer = NULL;
goto probe_exit_candev;
}
priv->timer_freq = clk_get_rate(priv->clk_timer);
err = register_candev(ndev);
if (err) {
dev_err(&pdev->dev, "register_candev() failed\n");
err = -ENODEV;
goto probe_exit_clk;
}
err = request_firmware(&priv->fw_tx, "PRU_CAN_Emulation_Tx.bin",
&pdev->dev);
if (err) {
dev_err(&pdev->dev, "can't load firmware\n");
err = -ENODEV;
goto probe_exit_clk;
}
dev_info(&pdev->dev, "fw_tx size %d. downloading...\n",
priv->fw_tx->size);
err = request_firmware(&priv->fw_rx, "PRU_CAN_Emulation_Rx.bin",
&pdev->dev);
if (err) {
dev_err(&pdev->dev, "can't load firmware\n");
err = -ENODEV;
goto probe_release_fw;
}
dev_info(&pdev->dev, "fw_rx size %d. downloading...\n",
priv->fw_rx->size);
fw_pru.ptr_pru1 = kmalloc(priv->fw_tx->size, GFP_KERNEL);
memcpy((void *)fw_pru.ptr_pru1, (const void *)priv->fw_tx->data,
priv->fw_tx->size);
fw_pru.u32_pru1_code_size = priv->fw_tx->size;
fw_pru.ptr_pru0 = kmalloc(priv->fw_rx->size, GFP_KERNEL);
memcpy((void *)fw_pru.ptr_pru0, (const void *)priv->fw_rx->data,
priv->fw_rx->size);
fw_pru.u32_pru0_code_size = priv->fw_rx->size;
/* init the pru */
pru_can_emulation_init(&priv->pru_arm_iomap, priv->can.clock.freq);
while ((pru_can_check_init_status()) && (retries++ < MAX_INIT_RETRIES))
udelay(retries);
if (MAX_INIT_RETRIES <= retries) {
dev_err(&pdev->dev, "failed to initialize the pru\n");
err = -ENODEV;
goto probe_release_fw_1;
}
pru_can_enable();
/* download firmware into pru */
err = pru_can_download_firmware(&fw_pru, 0);
if (err) {
dev_err(&pdev->dev, "firmware download error\n");
err = -ENODEV;
goto probe_release_fw_1;
}
err = pru_can_download_firmware(&fw_pru, 1);
if (err) {
dev_err(&pdev->dev, "firmware download error\n");
err = -ENODEV;
goto probe_release_fw_1;
}
if (pru_can_calculatetiming (DFLT_PRU_FREQ, DFLT_PRU_BITRATE) != 0) {
return -EINVAL;
}
pru_can_run(0);
pru_can_run(1);
kfree((const void *)fw_pru.ptr_pru0);
kfree((const void *)fw_pru.ptr_pru1);
/*Create The Work Queue */
if ((priv->pru_can_wQ =
create_freezeable_workqueue("omapl_pru_wQ")) == NULL)
dev_err(&pdev->dev, "failed to create work queue\n");
INIT_WORK(&priv->rx_work, omapl_pru_can_rx_wQ);
dev_info(&pdev->dev,
"%s device registered"
"(®_base=0x%p, trx_irq = %d, clk = %d)\n",
DRV_NAME, priv->pru_arm_iomap.pru_io_addr, priv->trx_irq,
priv->can.clock.freq);
return 0;
probe_release_fw_1:
kfree((const void *)fw_pru.ptr_pru0);
kfree((const void *)fw_pru.ptr_pru1);
release_firmware(priv->fw_rx);
probe_release_fw:
release_firmware(priv->fw_tx);
probe_exit_clk:
clk_put(priv->clk);
probe_exit_candev:
if (NULL != ndev)
free_candev(ndev);
probe_exit_iounmap:
iounmap(priv->pru_arm_iomap.pru_io_addr);
probe_exit_free_region:
release_mem_region(res_mem->start, resource_size(res_mem));
probe_exit:
return err;
}
/*
* probe function for usb devices
*/
static int sam4e_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_host_interface *usb_hi;
struct usb_interface_descriptor *usb_if_desc;
struct usb_device *udev;
int err = 0;
u8 if_num;
struct net_device *netdev;
struct sam4e_usb *dev;
struct sam4e_usb_handle *sam4e_usb_hnd;
int cnt = 0;
usb_hi = intf->cur_altsetting;
usb_if_desc = &usb_hi->desc;
if_num = usb_if_desc->bInterfaceNumber;
if (DEBUG_SAM4E) {
dev_info(&intf->dev, "probe %p %p if_num %d id if_num %d\n",
intf, id, if_num, id->bInterfaceNumber);
}
if (if_num != 1)
return -ENODEV;
dev = kzalloc(sizeof(struct sam4e_usb), GFP_KERNEL);
if (!dev) {
dev_err(&intf->dev, "Couldn't alloc sam4e_usb\n");
err = -ENOMEM;
goto cleanup_candev;
}
atomic_set(&dev->netif_queue_stop, 0);
while (cnt < MAX_CAN_INTF) {
netdev = alloc_candev(sizeof(struct sam4e_usb_handle),
MAX_TX_URBS);
if (!netdev) {
dev_err(&intf->dev, "Couldn't alloc candev\n");
err = -ENOMEM;
goto cleanup_candev;
}
sam4e_usb_hnd = netdev_priv(netdev);
sam4e_usb_hnd->sam4e_dev = dev;
sam4e_usb_hnd->owner_netdev_index = cnt;
dev->udev = interface_to_usbdev(intf);
if (cnt == 0)
dev->netdev1 = netdev;
else
dev->netdev2 = netdev;
dev->assembly_buffer = kzalloc(RX_ASSEMBLY_BUFFER_SIZE,
GFP_KERNEL);
netdev->netdev_ops = &sam4e_usb_netdev_ops;
init_usb_anchor(&dev->rx_submitted);
init_usb_anchor(&dev->tx_submitted);
atomic_set(&dev->active_tx_urbs, 0);
atomic_set(&dev->msg_seq, 0);
usb_set_intfdata(intf, dev);
SET_NETDEV_DEV(netdev, &intf->dev);
err = register_candev(netdev);
if (err) {
pr_err("fail reg.CAN device: %d", err);
goto cleanup_candev;
}
udev = interface_to_usbdev(intf);
if (cnt == 0) {
/*use mail box 7 and 6 for e/s frames on can0*/
setup_mailbox(7, 0, CAN_EFF_FLAG, CAN_EFF_FLAG,
intf, udev, dev);
setup_mailbox(6, 0, CAN_EFF_FLAG, 0,
intf, udev, dev);
} else {
/*use mail box 5 and 4 for e/s frames on can1*/
setup_mailbox(5, 1, CAN_EFF_FLAG, CAN_EFF_FLAG,
intf, udev, dev);
setup_mailbox(4, 1, CAN_EFF_FLAG, 0,
intf, udev, dev);
}
cnt++;
}
sam4e_read_fw_version(dev);
err = sam4e_init_urbs(dev);
if (err) {
if (err == -ENODEV) {
netif_device_detach(dev->netdev1);
netif_device_detach(dev->netdev2);
}
pr_err("couldn't start device: %d\n", err);
close_candev(dev->netdev1);
close_candev(dev->netdev2);
goto cleanup_candev;
}
return 0; /*ok. it's ours */
cleanup_candev:
if (dev) {
kfree(dev->assembly_buffer);
if (dev->netdev1)
free_candev(dev->netdev1);
if (dev->netdev2)
free_candev(dev->netdev2);
kfree(dev);
}
return err;
}
