static int usbduxsigma_ai_cmd(struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct usbduxsigma_private *devpriv = dev->private;
struct comedi_cmd *cmd = &s->async->cmd;
unsigned int len = cmd->chanlist_len;
uint8_t muxsg0 = 0;
uint8_t muxsg1 = 0;
uint8_t sysred = 0;
int ret;
int i;
down(&devpriv->sem);
/* set current channel of the running acquisition to zero */
s->async->cur_chan = 0;
for (i = 0; i < len; i++) {
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
create_adc_command(chan, &muxsg0, &muxsg1);
}
devpriv->dux_commands[1] = len; /* num channels per time step */
devpriv->dux_commands[2] = 0x12; /* CONFIG0 */
devpriv->dux_commands[3] = 0x03; /* CONFIG1: 23kHz sample, delay 0us */
devpriv->dux_commands[4] = 0x00; /* CONFIG3: diff. channels off */
devpriv->dux_commands[5] = muxsg0;
devpriv->dux_commands[6] = muxsg1;
devpriv->dux_commands[7] = sysred;
ret = usbbuxsigma_send_cmd(dev, USBBUXSIGMA_AD_CMD);
if (ret < 0) {
up(&devpriv->sem);
return ret;
}
devpriv->ai_counter = devpriv->ai_timer;
if (cmd->start_src == TRIG_NOW) {
/* enable this acquisition operation */
devpriv->ai_cmd_running = 1;
ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
devpriv->n_ai_urbs, 1);
if (ret < 0) {
devpriv->ai_cmd_running = 0;
up(&devpriv->sem);
return ret;
}
s->async->inttrig = NULL;
} else { /* TRIG_INT */
/* wait for an internal signal and submit the urbs later */
s->async->inttrig = usbduxsigma_ai_inttrig;
}
up(&devpriv->sem);
return 0;
}
static int usbduxsigma_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct usbduxsigma_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
uint8_t muxsg0 = 0;
uint8_t muxsg1 = 0;
uint8_t sysred = 0;
int ret;
int i;
down(&devpriv->sem);
if (devpriv->ai_cmd_running) {
up(&devpriv->sem);
return -EBUSY;
}
create_adc_command(chan, &muxsg0, &muxsg1);
/* Mode 0 is used to get a single conversion on demand */
devpriv->dux_commands[1] = 0x16; /* CONFIG0: chopper on */
devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
devpriv->dux_commands[4] = muxsg0;
devpriv->dux_commands[5] = muxsg1;
devpriv->dux_commands[6] = sysred;
/* adc commands */
ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
if (ret < 0) {
up(&devpriv->sem);
return ret;
}
for (i = 0; i < insn->n; i++) {
uint32_t val;
ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
if (ret < 0) {
up(&devpriv->sem);
return ret;
}
/* 32 bits big endian from the A/D converter */
val = be32_to_cpu(get_unaligned((__be32
*)(devpriv->insn_buf + 1)));
val &= 0x00ffffff; /* strip status byte */
val ^= 0x00800000; /* convert to unsigned */
data[i] = val;
}
up(&devpriv->sem);
return insn->n;
}
static int usbduxsigma_ai_cmd(struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct usbduxsigma_private *devpriv = dev->private;
struct comedi_cmd *cmd = &s->async->cmd;
unsigned int len = cmd->chanlist_len;
uint8_t muxsg0 = 0;
uint8_t muxsg1 = 0;
uint8_t sysred = 0;
int ret;
int i;
down(&devpriv->sem);
if (devpriv->high_speed) {
/*
* every 2 channels get a time window of 125us. Thus, if we
* sample all 16 channels we need 1ms. If we sample only one
* channel we need only 125us
*/
unsigned int interval = usbduxsigma_chans_to_interval(len);
devpriv->ai_interval = interval;
devpriv->ai_timer = cmd->scan_begin_arg / (125000 * interval);
} else {
/* interval always 1ms */
devpriv->ai_interval = 1;
devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
}
for (i = 0; i < len; i++) {
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
create_adc_command(chan, &muxsg0, &muxsg1);
}
devpriv->dux_commands[1] = devpriv->ai_interval;
devpriv->dux_commands[2] = len; /* num channels per time step */
devpriv->dux_commands[3] = 0x12; /* CONFIG0 */
devpriv->dux_commands[4] = 0x03; /* CONFIG1: 23kHz sample, delay 0us */
devpriv->dux_commands[5] = 0x00; /* CONFIG3: diff. channels off */
devpriv->dux_commands[6] = muxsg0;
devpriv->dux_commands[7] = muxsg1;
devpriv->dux_commands[8] = sysred;
ret = usbbuxsigma_send_cmd(dev, USBBUXSIGMA_AD_CMD);
if (ret < 0) {
up(&devpriv->sem);
return ret;
}
devpriv->ai_counter = devpriv->ai_timer;
if (cmd->start_src == TRIG_NOW) {
/* enable this acquisition operation */
devpriv->ai_cmd_running = 1;
ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
devpriv->n_ai_urbs, 1);
if (ret < 0) {
devpriv->ai_cmd_running = 0;
up(&devpriv->sem);
return ret;
}
s->async->inttrig = NULL;
} else { /* TRIG_INT */
s->async->inttrig = usbduxsigma_ai_inttrig;
}
up(&devpriv->sem);
return 0;
}
