static int usbduxsigma_submit_urbs(struct comedi_device *dev,
struct urb **urbs, int num_urbs,
int input_urb)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct usbduxsigma_private *devpriv = dev->private;
struct urb *urb;
int ret;
int i;
/* Submit all URBs and start the transfer on the bus */
for (i = 0; i < num_urbs; i++) {
urb = urbs[i];
/* in case of a resubmission after an unlink... */
if (input_urb)
urb->interval = devpriv->ai_interval;
urb->context = dev;
urb->dev = usb;
urb->status = 0;
urb->transfer_flags = URB_ISO_ASAP;
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret)
return ret;
}
return 0;
}
static int usbbuxsigma_send_cmd(struct comedi_device *dev, int cmd_type)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct usbduxsigma_private *devpriv = dev->private;
int nsent;
devpriv->dux_commands[0] = cmd_type;
return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1),
devpriv->dux_commands, SIZEOFDUXBUFFER,
&nsent, BULK_TIMEOUT);
}
static int usbduxsigma_submit_pwm_urb(struct comedi_device *dev)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct usbduxsigma_private *devpriv = dev->private;
struct urb *urb = devpriv->pwm_urb;
/* in case of a resubmission after an unlink... */
usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4),
urb->transfer_buffer, devpriv->pwm_buf_sz,
usbduxsigma_pwm_urb_complete, dev);
return usb_submit_urb(urb, GFP_ATOMIC);
}
static void usbduxsigma_ai_handle_urb(struct comedi_device *dev,
struct comedi_subdevice *s,
struct urb *urb)
{
struct usbduxsigma_private *devpriv = dev->private;
struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
uint32_t val;
int ret;
int i;
if ((urb->actual_length > 0) && (urb->status != -EXDEV)) {
devpriv->ai_counter--;
if (devpriv->ai_counter == 0) {
devpriv->ai_counter = devpriv->ai_timer;
/* get the data from the USB bus
and hand it over to comedi */
for (i = 0; i < cmd->chanlist_len; i++) {
/* transfer data,
note first byte is the DIO state */
val = be32_to_cpu(devpriv->in_buf[i+1]);
val &= 0x00ffffff; /* strip status byte */
val ^= 0x00800000; /* convert to unsigned */
if (!comedi_buf_write_samples(s, &val, 1))
return;
}
if (cmd->stop_src == TRIG_COUNT &&
async->scans_done >= cmd->stop_arg)
async->events |= COMEDI_CB_EOA;
}
}
/* if command is still running, resubmit urb */
if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
urb->dev = comedi_to_usb_dev(dev);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
ret);
if (ret == -EL2NSYNC)
dev_err(dev->class_dev,
"buggy USB host controller or bug in IRQ handler\n");
async->events |= COMEDI_CB_ERROR;
}
}
}
static void usbduxsigma_pwm_urb_complete(struct urb *urb)
{
struct comedi_device *dev = urb->context;
struct usbduxsigma_private *devpriv = dev->private;
int ret;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
case -ECONNABORTED:
/* happens after an unlink command */
if (devpriv->pwm_cmd_running)
usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
return;
default:
/* a real error */
if (devpriv->pwm_cmd_running) {
dev_err(dev->class_dev,
"%s: non-zero urb status (%d)\n",
__func__, urb->status);
usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
}
return;
}
if (!devpriv->pwm_cmd_running)
return;
urb->transfer_buffer_length = devpriv->pwm_buf_sz;
urb->dev = comedi_to_usb_dev(dev);
urb->status = 0;
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err(dev->class_dev, "%s: urb resubmit failed (%d)\n",
__func__, ret);
if (ret == -EL2NSYNC)
dev_err(dev->class_dev,
"buggy USB host controller or bug in IRQ handler\n");
usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
}
}
static int usbduxsigma_receive_cmd(struct comedi_device *dev, int command)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct usbduxsigma_private *devpriv = dev->private;
int nrec;
int ret;
int i;
for (i = 0; i < RETRIES; i++) {
ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8),
devpriv->insn_buf, SIZEINSNBUF,
&nrec, BULK_TIMEOUT);
if (ret < 0)
return ret;
if (devpriv->insn_buf[0] == command)
return 0;
}
/*
* This is only reached if the data has been requested a
* couple of times and the command was not received.
*/
return -EFAULT;
}
/* analogue IN - interrupt service routine */
static void usbduxsub_ai_isoc_irq(struct urb *urb)
{
struct comedi_device *dev = urb->context;
struct comedi_subdevice *s = dev->read_subdev;
struct usbdux_private *devpriv = dev->private;
int i, err, n;
/* first we test if something unusual has just happened */
switch (urb->status) {
case 0:
/* copy the result in the transfer buffer */
memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
break;
case -EILSEQ:
/* error in the ISOchronous data */
/* we don't copy the data into the transfer buffer */
/* and recycle the last data byte */
dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
case -ECONNABORTED:
/* happens after an unlink command */
if (devpriv->ai_cmd_running) {
s->async->events |= COMEDI_CB_EOA;
s->async->events |= COMEDI_CB_ERROR;
comedi_event(dev, s);
/* stop the transfer w/o unlink */
usbdux_ai_stop(dev, 0);
}
return;
default:
/* a real error on the bus */
/* pass error to comedi if we are really running a command */
if (devpriv->ai_cmd_running) {
dev_err(dev->class_dev,
"Non-zero urb status received in ai intr context: %d\n",
urb->status);
s->async->events |= COMEDI_CB_EOA;
s->async->events |= COMEDI_CB_ERROR;
comedi_event(dev, s);
/* don't do an unlink here */
usbdux_ai_stop(dev, 0);
}
return;
}
/*
* at this point we are reasonably sure that nothing dodgy has happened
* are we running a command?
*/
if (unlikely(!devpriv->ai_cmd_running)) {
/*
* not running a command, do not continue execution if no
* asynchronous command is running in particular not resubmit
*/
return;
}
urb->dev = comedi_to_usb_dev(dev);
/* resubmit the urb */
err = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(err < 0)) {
dev_err(dev->class_dev,
"urb resubmit failed in int-context! err=%d\n", err);
if (err == -EL2NSYNC)
dev_err(dev->class_dev,
"buggy USB host controller or bug in IRQ handler!\n");
s->async->events |= COMEDI_CB_EOA;
s->async->events |= COMEDI_CB_ERROR;
comedi_event(dev, s);
/* don't do an unlink here */
usbdux_ai_stop(dev, 0);
return;
}
devpriv->ai_counter--;
if (likely(devpriv->ai_counter > 0))
return;
/* timer zero, transfer measurements to comedi */
devpriv->ai_counter = devpriv->ai_timer;
/* test, if we transmit only a fixed number of samples */
if (!devpriv->ai_continous) {
/* not continuous, fixed number of samples */
devpriv->ai_sample_count--;
/* all samples received? */
if (devpriv->ai_sample_count < 0) {
/* prevent a resubmit next time */
usbdux_ai_stop(dev, 0);
/* say comedi that the acquistion is over */
s->async->events |= COMEDI_CB_EOA;
comedi_event(dev, s);
return;
}
}
/* get the data from the USB bus and hand it over to comedi */
n = s->async->cmd.chanlist_len;
for (i = 0; i < n; i++) {
unsigned int range = CR_RANGE(s->async->cmd.chanlist[i]);
int16_t val = le16_to_cpu(devpriv->in_buf[i]);
/* bipolar data is two's-complement */
if (comedi_range_is_bipolar(s, range))
val ^= ((s->maxdata + 1) >> 1);
/* transfer data */
err = comedi_buf_put(s->async, val);
if (unlikely(err == 0)) {
/* buffer overflow */
usbdux_ai_stop(dev, 0);
return;
}
}
/* tell comedi that data is there */
s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;
comedi_event(dev, s);
}
dev_err(dev->class_dev, "buffer underflow\n");
s->async->events |= (COMEDI_CB_EOA |
COMEDI_CB_OVERFLOW);
}
/* pointer to the DA */
*datap++ = val & 0xff;
*datap++ = (val >> 8) & 0xff;
*datap++ = chan << 6;
devpriv->ao_readback[chan] = val;
s->async->events |= COMEDI_CB_BLOCK;
comedi_event(dev, s);
}
}
urb->transfer_buffer_length = SIZEOUTBUF;
urb->dev = comedi_to_usb_dev(dev);
urb->status = 0;
if (devpriv->ao_cmd_running) {
if (devpriv->high_speed)
urb->interval = 8; /* uframes */
else
urb->interval = 1; /* frames */
urb->number_of_packets = 1;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = SIZEOUTBUF;
urb->iso_frame_desc[0].status = 0;
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err(dev->class_dev,
"ao urb resubm failed in int-cont. ret=%d",
ret);
static void usbduxsigma_ao_urb_complete(struct urb *urb)
{
struct comedi_device *dev = urb->context;
struct usbduxsigma_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->write_subdev;
struct comedi_cmd *cmd = &s->async->cmd;
uint8_t *datap;
int ret;
int i;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
case -ECONNABORTED:
/* happens after an unlink command */
if (devpriv->ao_cmd_running) {
usbduxsigma_ao_stop(dev, 0); /* w/o unlink */
s->async->events |= COMEDI_CB_EOA;
comedi_event(dev, s);
}
return;
default:
/* a real error */
if (devpriv->ao_cmd_running) {
dev_err(dev->class_dev,
"%s: non-zero urb status (%d)\n",
__func__, urb->status);
usbduxsigma_ao_stop(dev, 0); /* w/o unlink */
s->async->events |= (COMEDI_CB_ERROR | COMEDI_CB_EOA);
comedi_event(dev, s);
}
return;
}
if (!devpriv->ao_cmd_running)
return;
devpriv->ao_counter--;
if ((int)devpriv->ao_counter <= 0) {
/* timer zero, transfer from comedi */
devpriv->ao_counter = devpriv->ao_timer;
if (cmd->stop_src == TRIG_COUNT) {
/* not continuous, fixed number of samples */
devpriv->ao_sample_count--;
if (devpriv->ao_sample_count < 0) {
usbduxsigma_ao_stop(dev, 0); /* w/o unlink */
/* acquistion is over, tell comedi */
s->async->events |= COMEDI_CB_EOA;
comedi_event(dev, s);
return;
}
}
/* transmit data to the USB bus */
datap = urb->transfer_buffer;
*datap++ = cmd->chanlist_len;
for (i = 0; i < cmd->chanlist_len; i++) {
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
unsigned short val;
ret = comedi_buf_get(s, &val);
if (ret < 0) {
dev_err(dev->class_dev, "buffer underflow\n");
s->async->events |= (COMEDI_CB_EOA |
COMEDI_CB_OVERFLOW);
}
*datap++ = val;
*datap++ = chan;
s->readback[chan] = val;
s->async->events |= COMEDI_CB_BLOCK;
comedi_event(dev, s);
}
}
urb->transfer_buffer_length = SIZEOUTBUF;
urb->dev = comedi_to_usb_dev(dev);
urb->status = 0;
if (devpriv->high_speed)
urb->interval = 8; /* uframes */
else
urb->interval = 1; /* frames */
urb->number_of_packets = 1;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = SIZEOUTBUF;
urb->iso_frame_desc[0].status = 0;
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err(dev->class_dev,
"%s: urb resubmit failed (%d)\n",
__func__, ret);
if (ret == -EL2NSYNC)
dev_err(dev->class_dev,
"buggy USB host controller or bug in IRQ handler\n");
usbduxsigma_ao_stop(dev, 0); /* w/o unlink */
s->async->events |= (COMEDI_CB_EOA | COMEDI_CB_ERROR);
comedi_event(dev, s);
}
}
static void usbduxsigma_ai_urb_complete(struct urb *urb)
{
struct comedi_device *dev = urb->context;
struct usbduxsigma_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
struct comedi_cmd *cmd = &s->async->cmd;
unsigned int dio_state;
uint32_t val;
int ret;
int i;
/* first we test if something unusual has just happened */
switch (urb->status) {
case 0:
/* copy the result in the transfer buffer */
memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
break;
case -EILSEQ:
/*
* error in the ISOchronous data
* we don't copy the data into the transfer buffer
* and recycle the last data byte
*/
dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
case -ECONNABORTED:
/* happens after an unlink command */
if (devpriv->ai_cmd_running) {
usbduxsigma_ai_stop(dev, 0); /* w/o unlink */
/* we are still running a command, tell comedi */
s->async->events |= (COMEDI_CB_EOA | COMEDI_CB_ERROR);
comedi_event(dev, s);
}
return;
default:
/*
* a real error on the bus
* pass error to comedi if we are really running a command
*/
if (devpriv->ai_cmd_running) {
dev_err(dev->class_dev,
"%s: non-zero urb status (%d)\n",
__func__, urb->status);
usbduxsigma_ai_stop(dev, 0); /* w/o unlink */
s->async->events |= (COMEDI_CB_EOA | COMEDI_CB_ERROR);
comedi_event(dev, s);
}
return;
}
if (unlikely(!devpriv->ai_cmd_running))
return;
urb->dev = comedi_to_usb_dev(dev);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(ret < 0)) {
dev_err(dev->class_dev, "%s: urb resubmit failed (%d)\n",
__func__, ret);
if (ret == -EL2NSYNC)
dev_err(dev->class_dev,
"buggy USB host controller or bug in IRQ handler\n");
usbduxsigma_ai_stop(dev, 0); /* w/o unlink */
s->async->events |= (COMEDI_CB_EOA | COMEDI_CB_ERROR);
comedi_event(dev, s);
return;
}
/* get the state of the dio pins to allow external trigger */
dio_state = be32_to_cpu(devpriv->in_buf[0]);
devpriv->ai_counter--;
if (likely(devpriv->ai_counter > 0))
return;
/* timer zero, transfer measurements to comedi */
devpriv->ai_counter = devpriv->ai_timer;
if (cmd->stop_src == TRIG_COUNT) {
/* not continuous, fixed number of samples */
devpriv->ai_sample_count--;
if (devpriv->ai_sample_count < 0) {
usbduxsigma_ai_stop(dev, 0); /* w/o unlink */
/* acquistion is over, tell comedi */
s->async->events |= COMEDI_CB_EOA;
comedi_event(dev, s);
return;
}
}
/* get the data from the USB bus and hand it over to comedi */
for (i = 0; i < cmd->chanlist_len; i++) {
/* transfer data, note first byte is the DIO state */
val = be32_to_cpu(devpriv->in_buf[i+1]);
val &= 0x00ffffff; /* strip status byte */
val ^= 0x00800000; /* convert to unsigned */
ret = cfc_write_array_to_buffer(s, &val, sizeof(uint32_t));
if (unlikely(ret == 0)) {
/* buffer overflow */
usbduxsigma_ai_stop(dev, 0); /* w/o unlink */
return;
}
}
/* tell comedi that data is there */
s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
comedi_event(dev, s);
}
static int usbduxsigma_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
{
struct usb_interface *intf = comedi_to_usb_interface(dev);
struct usb_device *usb = comedi_to_usb_dev(dev);
struct usbduxsigma_private *devpriv;
struct comedi_subdevice *s;
int offset;
int ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
sema_init(&devpriv->sem, 1);
usb_set_intfdata(intf, devpriv);
devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
if (devpriv->high_speed) {
devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH;
devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH;
devpriv->pwm_buf_sz = 512;
} else {
devpriv->n_ai_urbs = NUMOFINBUFFERSFULL;
devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL;
}
ret = usbduxsigma_alloc_usb_buffers(dev);
if (ret)
return ret;
/* setting to alternate setting 3: enabling iso ep and bulk ep. */
ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
3);
if (ret < 0) {
dev_err(dev->class_dev,
"could not set alternate setting 3 in high speed\n");
return ret;
}
ret = comedi_load_firmware(dev, &usb->dev, FIRMWARE,
usbduxsigma_firmware_upload, 0);
if (ret)
return ret;
ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 4 : 3);
if (ret)
return ret;
/* Analog Input subdevice */
s = &dev->subdevices[0];
dev->read_subdev = s;
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ | SDF_LSAMPL;
s->n_chan = NUMCHANNELS;
s->len_chanlist = NUMCHANNELS;
s->maxdata = 0x00ffffff;
s->range_table = &usbduxsigma_ai_range;
s->insn_read = usbduxsigma_ai_insn_read;
s->do_cmdtest = usbduxsigma_ai_cmdtest;
s->do_cmd = usbduxsigma_ai_cmd;
s->cancel = usbduxsigma_ai_cancel;
/* Analog Output subdevice */
s = &dev->subdevices[1];
dev->write_subdev = s;
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
s->n_chan = 4;
s->len_chanlist = s->n_chan;
s->maxdata = 0x00ff;
s->range_table = &range_unipolar2_5;
s->insn_write = usbduxsigma_ao_insn_write;
s->insn_read = usbduxsigma_ao_insn_read;
s->do_cmdtest = usbduxsigma_ao_cmdtest;
s->do_cmd = usbduxsigma_ao_cmd;
s->cancel = usbduxsigma_ao_cancel;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
/* Digital I/O subdevice */
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
s->n_chan = 24;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = usbduxsigma_dio_insn_bits;
s->insn_config = usbduxsigma_dio_insn_config;
if (devpriv->high_speed) {
/* Timer / pwm subdevice */
s = &dev->subdevices[3];
s->type = COMEDI_SUBD_PWM;
s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
s->n_chan = 8;
s->maxdata = devpriv->pwm_buf_sz;
s->insn_write = usbduxsigma_pwm_write;
s->insn_config = usbduxsigma_pwm_config;
usbduxsigma_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
}
offset = usbduxsigma_getstatusinfo(dev, 0);
if (offset < 0) {
dev_err(dev->class_dev,
"Communication to USBDUXSIGMA failed! Check firmware and cabling.\n");
return offset;
}
dev_info(dev->class_dev, "ADC_zero = %x\n", offset);
return 0;
}
static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct usbduxsigma_private *devpriv = dev->private;
struct urb *urb;
int i;
devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(urb), GFP_KERNEL);
devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(urb), GFP_KERNEL);
if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
!devpriv->ai_urbs || !devpriv->ao_urbs)
return -ENOMEM;
for (i = 0; i < devpriv->n_ai_urbs; i++) {
/* one frame: 1ms */
urb = usb_alloc_urb(1, GFP_KERNEL);
if (!urb)
return -ENOMEM;
devpriv->ai_urbs[i] = urb;
urb->dev = usb;
/* will be filled later with a pointer to the comedi-device */
/* and ONLY then the urb should be submitted */
urb->context = NULL;
urb->pipe = usb_rcvisocpipe(usb, 6);
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
if (!urb->transfer_buffer)
return -ENOMEM;
urb->complete = usbduxsigma_ai_urb_complete;
urb->number_of_packets = 1;
urb->transfer_buffer_length = SIZEINBUF;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = SIZEINBUF;
}
for (i = 0; i < devpriv->n_ao_urbs; i++) {
/* one frame: 1ms */
urb = usb_alloc_urb(1, GFP_KERNEL);
if (!urb)
return -ENOMEM;
devpriv->ao_urbs[i] = urb;
urb->dev = usb;
/* will be filled later with a pointer to the comedi-device */
/* and ONLY then the urb should be submitted */
urb->context = NULL;
urb->pipe = usb_sndisocpipe(usb, 2);
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
if (!urb->transfer_buffer)
return -ENOMEM;
urb->complete = usbduxsigma_ao_urb_complete;
urb->number_of_packets = 1;
urb->transfer_buffer_length = SIZEOUTBUF;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = SIZEOUTBUF;
if (devpriv->high_speed)
urb->interval = 8; /* uframes */
else
urb->interval = 1; /* frames */
}
if (devpriv->pwm_buf_sz) {
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb)
return -ENOMEM;
devpriv->pwm_urb = urb;
urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
GFP_KERNEL);
if (!urb->transfer_buffer)
return -ENOMEM;
}
return 0;
}
static int usbduxsigma_firmware_upload(struct comedi_device *dev,
const u8 *data, size_t size,
unsigned long context)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
uint8_t *buf;
uint8_t *tmp;
int ret;
if (!data)
return 0;
if (size > FIRMWARE_MAX_LEN) {
dev_err(dev->class_dev, "firmware binary too large for FX2\n");
return -ENOMEM;
}
/* we generate a local buffer for the firmware */
buf = kmemdup(data, size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* we need a malloc'ed buffer for usb_control_msg() */
tmp = kmalloc(1, GFP_KERNEL);
if (!tmp) {
kfree(buf);
return -ENOMEM;
}
/* stop the current firmware on the device */
*tmp = 1; /* 7f92 to one */
ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
USBDUXSUB_FIRMWARE,
VENDOR_DIR_OUT,
USBDUXSUB_CPUCS, 0x0000,
tmp, 1,
BULK_TIMEOUT);
if (ret < 0) {
dev_err(dev->class_dev, "can not stop firmware\n");
goto done;
}
/* upload the new firmware to the device */
ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
USBDUXSUB_FIRMWARE,
VENDOR_DIR_OUT,
0, 0x0000,
buf, size,
BULK_TIMEOUT);
if (ret < 0) {
dev_err(dev->class_dev, "firmware upload failed\n");
goto done;
}
/* start the new firmware on the device */
*tmp = 0; /* 7f92 to zero */
ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
USBDUXSUB_FIRMWARE,
VENDOR_DIR_OUT,
USBDUXSUB_CPUCS, 0x0000,
tmp, 1,
BULK_TIMEOUT);
if (ret < 0)
dev_err(dev->class_dev, "can not start firmware\n");
done:
kfree(tmp);
kfree(buf);
return ret;
}
static void usbduxsigma_ao_handle_urb(struct comedi_device *dev,
struct comedi_subdevice *s,
struct urb *urb)
{
struct usbduxsigma_private *devpriv = dev->private;
struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
uint8_t *datap;
int ret;
int i;
devpriv->ao_counter--;
if (devpriv->ao_counter == 0) {
devpriv->ao_counter = devpriv->ao_timer;
if (cmd->stop_src == TRIG_COUNT &&
async->scans_done >= cmd->stop_arg) {
async->events |= COMEDI_CB_EOA;
return;
}
/* transmit data to the USB bus */
datap = urb->transfer_buffer;
*datap++ = cmd->chanlist_len;
for (i = 0; i < cmd->chanlist_len; i++) {
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
unsigned short val;
if (!comedi_buf_read_samples(s, &val, 1)) {
dev_err(dev->class_dev, "buffer underflow\n");
async->events |= COMEDI_CB_OVERFLOW;
return;
}
*datap++ = val;
*datap++ = chan;
s->readback[chan] = val;
}
}
/* if command is still running, resubmit urb */
if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
urb->transfer_buffer_length = SIZEOUTBUF;
urb->dev = comedi_to_usb_dev(dev);
urb->status = 0;
if (devpriv->high_speed)
urb->interval = 8; /* uframes */
else
urb->interval = 1; /* frames */
urb->number_of_packets = 1;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = SIZEOUTBUF;
urb->iso_frame_desc[0].status = 0;
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err(dev->class_dev,
"%s: urb resubmit failed (%d)\n",
__func__, ret);
if (ret == -EL2NSYNC)
dev_err(dev->class_dev,
"buggy USB host controller or bug in IRQ handler\n");
async->events |= COMEDI_CB_ERROR;
}
}
}
