--- /dev/null
+/*
+ * usbduxsigma.c
+ * Copyright (C) 2011-2014 Bernd Porr, mail@berndporr.me.uk
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * Driver: usbduxsigma
+ * Description: University of Stirling USB DAQ & INCITE Technology Limited
+ * Devices: [ITL] USB-DUX-SIGMA (usbduxsigma)
+ * Author: Bernd Porr <mail@berndporr.me.uk>
+ * Updated: 10 Oct 2014
+ * Status: stable
+ */
+
+/*
+ * I must give credit here to Chris Baugher who
+ * wrote the driver for AT-MIO-16d. I used some parts of this
+ * driver. I also must give credits to David Brownell
+ * who supported me with the USB development.
+ *
+ * Note: the raw data from the A/D converter is 24 bit big endian
+ * anything else is little endian to/from the dux board
+ *
+ *
+ * Revision history:
+ * 0.1: initial version
+ * 0.2: all basic functions implemented, digital I/O only for one port
+ * 0.3: proper vendor ID and driver name
+ * 0.4: fixed D/A voltage range
+ * 0.5: various bug fixes, health check at startup
+ * 0.6: corrected wrong input range
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/fcntl.h>
+#include <linux/compiler.h>
+#include <asm/unaligned.h>
+
+#include "../comedi_usb.h"
+
+/* timeout for the USB-transfer in ms*/
+#define BULK_TIMEOUT 1000
+
+/* constants for "firmware" upload and download */
+#define FIRMWARE "usbduxsigma_firmware.bin"
+#define FIRMWARE_MAX_LEN 0x4000
+#define USBDUXSUB_FIRMWARE 0xa0
+#define VENDOR_DIR_IN 0xc0
+#define VENDOR_DIR_OUT 0x40
+
+/* internal addresses of the 8051 processor */
+#define USBDUXSUB_CPUCS 0xE600
+
+/* 300Hz max frequ under PWM */
+#define MIN_PWM_PERIOD ((long)(1E9/300))
+
+/* Default PWM frequency */
+#define PWM_DEFAULT_PERIOD ((long)(1E9/100))
+
+/* Number of channels (16 AD and offset)*/
+#define NUMCHANNELS 16
+
+/* Size of one A/D value */
+#define SIZEADIN ((sizeof(uint32_t)))
+
+/*
+ * Size of the async input-buffer IN BYTES, the DIO state is transmitted
+ * as the first byte.
+ */
+#define SIZEINBUF (((NUMCHANNELS+1)*SIZEADIN))
+
+/* 16 bytes. */
+#define SIZEINSNBUF 16
+
+/* Number of DA channels */
+#define NUMOUTCHANNELS 8
+
+/* size of one value for the D/A converter: channel and value */
+#define SIZEDAOUT ((sizeof(uint8_t)+sizeof(uint16_t)))
+
+/*
+ * Size of the output-buffer in bytes
+ * Actually only the first 4 triplets are used but for the
+ * high speed mode we need to pad it to 8 (microframes).
+ */
+#define SIZEOUTBUF ((8*SIZEDAOUT))
+
+/*
+ * Size of the buffer for the dux commands: just now max size is determined
+ * by the analogue out + command byte + panic bytes...
+ */
+#define SIZEOFDUXBUFFER ((8*SIZEDAOUT+2))
+
+/* Number of in-URBs which receive the data: min=2 */
+#define NUMOFINBUFFERSFULL 5
+
+/* Number of out-URBs which send the data: min=2 */
+#define NUMOFOUTBUFFERSFULL 5
+
+/* Number of in-URBs which receive the data: min=5 */
+/* must have more buffers due to buggy USB ctr */
+#define NUMOFINBUFFERSHIGH 10
+
+/* Number of out-URBs which send the data: min=5 */
+/* must have more buffers due to buggy USB ctr */
+#define NUMOFOUTBUFFERSHIGH 10
+
+/* number of retries to get the right dux command */
+#define RETRIES 10
+
+/* bulk transfer commands to usbduxsigma */
+#define USBBUXSIGMA_AD_CMD 0
+#define USBDUXSIGMA_DA_CMD 1
+#define USBDUXSIGMA_DIO_CFG_CMD 2
+#define USBDUXSIGMA_DIO_BITS_CMD 3
+#define USBDUXSIGMA_SINGLE_AD_CMD 4
+#define USBDUXSIGMA_PWM_ON_CMD 7
+#define USBDUXSIGMA_PWM_OFF_CMD 8
+
+static const struct comedi_lrange usbduxsigma_ai_range = {
+ 1, {
+ BIP_RANGE(2.5 * 0x800000 / 0x780000 / 2.0)
+ }
+};
+
+struct usbduxsigma_private {
+ /* actual number of in-buffers */
+ int n_ai_urbs;
+ /* actual number of out-buffers */
+ int n_ao_urbs;
+ /* ISO-transfer handling: buffers */
+ struct urb **ai_urbs;
+ struct urb **ao_urbs;
+ /* pwm-transfer handling */
+ struct urb *pwm_urb;
+ /* PWM period */
+ unsigned int pwm_period;
+ /* PWM internal delay for the GPIF in the FX2 */
+ uint8_t pwm_delay;
+ /* size of the PWM buffer which holds the bit pattern */
+ int pwm_buf_sz;
+ /* input buffer for the ISO-transfer */
+ __be32 *in_buf;
+ /* input buffer for single insn */
+ uint8_t *insn_buf;
+
+ unsigned high_speed:1;
+ unsigned ai_cmd_running:1;
+ unsigned ao_cmd_running:1;
+ unsigned pwm_cmd_running:1;
+
+ /* time between samples in units of the timer */
+ unsigned int ai_timer;
+ unsigned int ao_timer;
+ /* counter between acquisitions */
+ unsigned int ai_counter;
+ unsigned int ao_counter;
+ /* interval in frames/uframes */
+ unsigned int ai_interval;
+ /* commands */
+ uint8_t *dux_commands;
+ struct semaphore sem;
+};
+
+static void usbduxsigma_unlink_urbs(struct urb **urbs, int num_urbs)
+{
+ int i;
+
+ for (i = 0; i < num_urbs; i++)
+ usb_kill_urb(urbs[i]);
+}
+
+static void usbduxsigma_ai_stop(struct comedi_device *dev, int do_unlink)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ if (do_unlink && devpriv->ai_urbs)
+ usbduxsigma_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
+
+ devpriv->ai_cmd_running = 0;
+}
+
+static int usbduxsigma_ai_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ down(&devpriv->sem);
+ /* unlink only if it is really running */
+ usbduxsigma_ai_stop(dev, devpriv->ai_cmd_running);
+ up(&devpriv->sem);
+
+ return 0;
+}
+
+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;
+
+ 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_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_async *async = s->async;
+
+ /* exit if not running a command, do not resubmit urb */
+ if (!devpriv->ai_cmd_running)
+ return;
+
+ switch (urb->status) {
+ case 0:
+ /* copy the result in the transfer buffer */
+ memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
+ usbduxsigma_ai_handle_urb(dev, s, urb);
+ 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");
+ usbduxsigma_ai_handle_urb(dev, s, urb);
+ break;
+
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ECONNABORTED:
+ /* happens after an unlink command */
+ async->events |= COMEDI_CB_ERROR;
+ break;
+
+ default:
+ /* a real error */
+ dev_err(dev->class_dev, "non-zero urb status (%d)\n",
+ urb->status);
+ async->events |= COMEDI_CB_ERROR;
+ break;
+ }
+
+ /*
+ * comedi_handle_events() cannot be used in this driver. The (*cancel)
+ * operation would unlink the urb.
+ */
+ if (async->events & COMEDI_CB_CANCEL_MASK)
+ usbduxsigma_ai_stop(dev, 0);
+
+ comedi_event(dev, s);
+}
+
+static void usbduxsigma_ao_stop(struct comedi_device *dev, int do_unlink)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ if (do_unlink && devpriv->ao_urbs)
+ usbduxsigma_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
+
+ devpriv->ao_cmd_running = 0;
+}
+
+static int usbduxsigma_ao_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ down(&devpriv->sem);
+ /* unlink only if it is really running */
+ usbduxsigma_ao_stop(dev, devpriv->ao_cmd_running);
+ up(&devpriv->sem);
+
+ return 0;
+}
+
+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, "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_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_async *async = s->async;
+
+ /* exit if not running a command, do not resubmit urb */
+ if (!devpriv->ao_cmd_running)
+ return;
+
+ switch (urb->status) {
+ case 0:
+ usbduxsigma_ao_handle_urb(dev, s, urb);
+ break;
+
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ECONNABORTED:
+ /* happens after an unlink command */
+ async->events |= COMEDI_CB_ERROR;
+ break;
+
+ default:
+ /* a real error */
+ dev_err(dev->class_dev, "non-zero urb status (%d)\n",
+ urb->status);
+ async->events |= COMEDI_CB_ERROR;
+ break;
+ }
+
+ /*
+ * comedi_handle_events() cannot be used in this driver. The (*cancel)
+ * operation would unlink the urb.
+ */
+ if (async->events & COMEDI_CB_CANCEL_MASK)
+ usbduxsigma_ao_stop(dev, 0);
+
+ comedi_event(dev, s);
+}
+
+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 usbduxsigma_chans_to_interval(int num_chan)
+{
+ if (num_chan <= 2)
+ return 2; /* 4kHz */
+ if (num_chan <= 8)
+ return 4; /* 2kHz */
+ return 8; /* 1kHz */
+}
+
+static int usbduxsigma_ai_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ int high_speed = devpriv->high_speed;
+ int interval = usbduxsigma_chans_to_interval(cmd->chanlist_len);
+ int err = 0;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
+ err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+
+ err |= comedi_check_trigger_is_unique(cmd->start_src);
+ err |= comedi_check_trigger_is_unique(cmd->stop_src);
+
+ /* Step 2b : and mutually compatible */
+
+ if (err)
+ return 2;
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+
+ if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ unsigned int tmp;
+
+ if (high_speed) {
+ /*
+ * In high speed mode microframes are possible.
+ * However, during one microframe we can roughly
+ * sample two channels. Thus, the more channels
+ * are in the channel list the more time we need.
+ */
+ err |= comedi_check_trigger_arg_min(&cmd->
+ scan_begin_arg,
+ (1000000 / 8 *
+ interval));
+
+ tmp = (cmd->scan_begin_arg / 125000) * 125000;
+ } else {
+ /* full speed */
+ /* 1kHz scans every USB frame */
+ err |= comedi_check_trigger_arg_min(&cmd->
+ scan_begin_arg,
+ 1000000);
+
+ tmp = (cmd->scan_begin_arg / 1000000) * 1000000;
+ }
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, tmp);
+ }
+
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+
+ if (cmd->stop_src == TRIG_COUNT)
+ err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
+ else /* TRIG_NONE */
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments */
+
+ if (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
+ */
+ 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;
+ }
+ if (devpriv->ai_timer < 1)
+ err |= -EINVAL;
+
+ if (err)
+ return 4;
+
+ return 0;
+}
+
+/*
+ * creates the ADC command for the MAX1271
+ * range is the range value from comedi
+ */
+static void create_adc_command(unsigned int chan,
+ uint8_t *muxsg0,
+ uint8_t *muxsg1)
+{
+ if (chan < 8)
+ (*muxsg0) = (*muxsg0) | (1 << chan);
+ else if (chan < 16)
+ (*muxsg1) = (*muxsg1) | (1 << (chan-8));
+}
+
+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_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;
+}
+
+static int usbduxsigma_ai_inttrig(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int trig_num)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ int ret;
+
+ if (trig_num != cmd->start_arg)
+ return -EINVAL;
+
+ down(&devpriv->sem);
+ if (!devpriv->ai_cmd_running) {
+ 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;
+ }
+ up(&devpriv->sem);
+
+ return 1;
+}
+
+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);
+
+ 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 */
+ 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_ao_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ int ret;
+
+ down(&devpriv->sem);
+ ret = comedi_readback_insn_read(dev, s, insn, data);
+ up(&devpriv->sem);
+
+ return ret;
+}
+
+static int usbduxsigma_ao_insn_write(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);
+ int ret;
+ int i;
+
+ down(&devpriv->sem);
+ if (devpriv->ao_cmd_running) {
+ up(&devpriv->sem);
+ return -EBUSY;
+ }
+
+ for (i = 0; i < insn->n; i++) {
+ devpriv->dux_commands[1] = 1; /* num channels */
+ devpriv->dux_commands[2] = data[i]; /* value */
+ devpriv->dux_commands[3] = chan; /* channel number */
+ ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DA_CMD);
+ if (ret < 0) {
+ up(&devpriv->sem);
+ return ret;
+ }
+ s->readback[chan] = data[i];
+ }
+ up(&devpriv->sem);
+
+ return insn->n;
+}
+
+static int usbduxsigma_ao_inttrig(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int trig_num)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ int ret;
+
+ if (trig_num != cmd->start_arg)
+ return -EINVAL;
+
+ down(&devpriv->sem);
+ if (!devpriv->ao_cmd_running) {
+ devpriv->ao_cmd_running = 1;
+ ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
+ devpriv->n_ao_urbs, 0);
+ if (ret < 0) {
+ devpriv->ao_cmd_running = 0;
+ up(&devpriv->sem);
+ return ret;
+ }
+ s->async->inttrig = NULL;
+ }
+ up(&devpriv->sem);
+
+ return 1;
+}
+
+static int usbduxsigma_ao_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ int err = 0;
+ int high_speed;
+ unsigned int flags;
+
+ /* high speed conversions are not used yet */
+ high_speed = 0; /* (devpriv->high_speed) */
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
+
+ if (high_speed) {
+ /*
+ * start immediately a new scan
+ * the sampling rate is set by the coversion rate
+ */
+ flags = TRIG_FOLLOW;
+ } else {
+ /* start a new scan (output at once) with a timer */
+ flags = TRIG_TIMER;
+ }
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src, flags);
+
+ err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
+
+ if (err) {
+ up(&devpriv->sem);
+ return 1;
+ }
+
+ /* Step 2a : make sure trigger sources are unique */
+
+ err |= comedi_check_trigger_is_unique(cmd->start_src);
+ err |= comedi_check_trigger_is_unique(cmd->stop_src);
+
+ /* Step 2b : and mutually compatible */
+
+ if (err)
+ return 2;
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+
+ if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
+ 1000000);
+ }
+
+ /* not used now, is for later use */
+ if (cmd->convert_src == TRIG_TIMER)
+ err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 125000);
+
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+
+ if (cmd->stop_src == TRIG_COUNT)
+ err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
+ else /* TRIG_NONE */
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments */
+
+ /* we count in timer steps */
+ if (high_speed) {
+ /* timing of the conversion itself: every 125 us */
+ devpriv->ao_timer = cmd->convert_arg / 125000;
+ } else {
+ /*
+ * timing of the scan: every 1ms
+ * we get all channels at once
+ */
+ devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
+ }
+ if (devpriv->ao_timer < 1)
+ err |= -EINVAL;
+
+ if (err)
+ return 4;
+
+ return 0;
+}
+
+static int usbduxsigma_ao_cmd(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ int ret;
+
+ down(&devpriv->sem);
+
+ devpriv->ao_counter = devpriv->ao_timer;
+
+ if (cmd->start_src == TRIG_NOW) {
+ /* enable this acquisition operation */
+ devpriv->ao_cmd_running = 1;
+ ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
+ devpriv->n_ao_urbs, 0);
+ if (ret < 0) {
+ devpriv->ao_cmd_running = 0;
+ up(&devpriv->sem);
+ return ret;
+ }
+ s->async->inttrig = NULL;
+ } else { /* TRIG_INT */
+ s->async->inttrig = usbduxsigma_ao_inttrig;
+ }
+
+ up(&devpriv->sem);
+
+ return 0;
+}
+
+static int usbduxsigma_dio_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ int ret;
+
+ ret = comedi_dio_insn_config(dev, s, insn, data, 0);
+ if (ret)
+ return ret;
+
+ /*
+ * We don't tell the firmware here as it would take 8 frames
+ * to submit the information. We do it in the (*insn_bits).
+ */
+ return insn->n;
+}
+
+static int usbduxsigma_dio_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ int ret;
+
+ down(&devpriv->sem);
+
+ comedi_dio_update_state(s, data);
+
+ /* Always update the hardware. See the (*insn_config). */
+ devpriv->dux_commands[1] = s->io_bits & 0xff;
+ devpriv->dux_commands[4] = s->state & 0xff;
+ devpriv->dux_commands[2] = (s->io_bits >> 8) & 0xff;
+ devpriv->dux_commands[5] = (s->state >> 8) & 0xff;
+ devpriv->dux_commands[3] = (s->io_bits >> 16) & 0xff;
+ devpriv->dux_commands[6] = (s->state >> 16) & 0xff;
+
+ ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
+ if (ret < 0)
+ goto done;
+ ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
+ if (ret < 0)
+ goto done;
+
+ s->state = devpriv->insn_buf[1] |
+ (devpriv->insn_buf[2] << 8) |
+ (devpriv->insn_buf[3] << 16);
+
+ data[1] = s->state;
+ ret = insn->n;
+
+done:
+ up(&devpriv->sem);
+
+ return ret;
+}
+
+static void usbduxsigma_pwm_stop(struct comedi_device *dev, int do_unlink)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ if (do_unlink) {
+ if (devpriv->pwm_urb)
+ usb_kill_urb(devpriv->pwm_urb);
+ }
+
+ devpriv->pwm_cmd_running = 0;
+}
+
+static int usbduxsigma_pwm_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ /* unlink only if it is really running */
+ usbduxsigma_pwm_stop(dev, devpriv->pwm_cmd_running);
+
+ return usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_OFF_CMD);
+}
+
+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, "non-zero urb status (%d)\n",
+ 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, "urb resubmit failed (%d)\n", 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_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 int usbduxsigma_pwm_period(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int period)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ int fx2delay = 255;
+
+ if (period < MIN_PWM_PERIOD)
+ return -EAGAIN;
+
+ fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
+ if (fx2delay > 255)
+ return -EAGAIN;
+
+ devpriv->pwm_delay = fx2delay;
+ devpriv->pwm_period = period;
+ return 0;
+}
+
+static int usbduxsigma_pwm_start(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ int ret;
+
+ if (devpriv->pwm_cmd_running)
+ return 0;
+
+ devpriv->dux_commands[1] = devpriv->pwm_delay;
+ ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_ON_CMD);
+ if (ret < 0)
+ return ret;
+
+ memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
+
+ devpriv->pwm_cmd_running = 1;
+ ret = usbduxsigma_submit_pwm_urb(dev);
+ if (ret < 0) {
+ devpriv->pwm_cmd_running = 0;
+ return ret;
+ }
+
+ return 0;
+}
+
+static void usbduxsigma_pwm_pattern(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int chan,
+ unsigned int value,
+ unsigned int sign)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ char pwm_mask = (1 << chan); /* DIO bit for the PWM data */
+ char sgn_mask = (16 << chan); /* DIO bit for the sign */
+ char *buf = (char *)(devpriv->pwm_urb->transfer_buffer);
+ int szbuf = devpriv->pwm_buf_sz;
+ int i;
+
+ for (i = 0; i < szbuf; i++) {
+ char c = *buf;
+
+ c &= ~pwm_mask;
+ if (i < value)
+ c |= pwm_mask;
+ if (!sign)
+ c &= ~sgn_mask;
+ else
+ c |= sgn_mask;
+ *buf++ = c;
+ }
+}
+
+static int usbduxsigma_pwm_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+
+ /*
+ * It doesn't make sense to support more than one value here
+ * because it would just overwrite the PWM buffer.
+ */
+ if (insn->n != 1)
+ return -EINVAL;
+
+ /*
+ * The sign is set via a special INSN only, this gives us 8 bits
+ * for normal operation, sign is 0 by default.
+ */
+ usbduxsigma_pwm_pattern(dev, s, chan, data[0], 0);
+
+ return insn->n;
+}
+
+static int usbduxsigma_pwm_config(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);
+
+ switch (data[0]) {
+ case INSN_CONFIG_ARM:
+ /*
+ * if not zero the PWM is limited to a certain time which is
+ * not supported here
+ */
+ if (data[1] != 0)
+ return -EINVAL;
+ return usbduxsigma_pwm_start(dev, s);
+ case INSN_CONFIG_DISARM:
+ return usbduxsigma_pwm_cancel(dev, s);
+ case INSN_CONFIG_GET_PWM_STATUS:
+ data[1] = devpriv->pwm_cmd_running;
+ return 0;
+ case INSN_CONFIG_PWM_SET_PERIOD:
+ return usbduxsigma_pwm_period(dev, s, data[1]);
+ case INSN_CONFIG_PWM_GET_PERIOD:
+ data[1] = devpriv->pwm_period;
+ return 0;
+ case INSN_CONFIG_PWM_SET_H_BRIDGE:
+ /*
+ * data[1] = value
+ * data[2] = sign (for a relay)
+ */
+ usbduxsigma_pwm_pattern(dev, s, chan, data[1], (data[2] != 0));
+ return 0;
+ case INSN_CONFIG_PWM_GET_H_BRIDGE:
+ /* values are not kept in this driver, nothing to return */
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static int usbduxsigma_getstatusinfo(struct comedi_device *dev, int chan)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ uint8_t sysred;
+ uint32_t val;
+ int ret;
+
+ switch (chan) {
+ default:
+ case 0:
+ sysred = 0; /* ADC zero */
+ break;
+ case 1:
+ sysred = 1; /* ADC offset */
+ break;
+ case 2:
+ sysred = 4; /* VCC */
+ break;
+ case 3:
+ sysred = 8; /* temperature */
+ break;
+ case 4:
+ sysred = 16; /* gain */
+ break;
+ case 5:
+ sysred = 32; /* ref */
+ break;
+ }
+
+ devpriv->dux_commands[1] = 0x12; /* CONFIG0 */
+ devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
+ devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
+ devpriv->dux_commands[4] = 0;
+ devpriv->dux_commands[5] = 0;
+ devpriv->dux_commands[6] = sysred;
+ ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
+ if (ret < 0)
+ return ret;
+
+ ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
+ if (ret < 0)
+ 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 */
+
+ return (int)val;
+}
+
+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 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 void usbduxsigma_free_usb_buffers(struct comedi_device *dev)
+{
+ struct usbduxsigma_private *devpriv = dev->private;
+ struct urb *urb;
+ int i;
+
+ urb = devpriv->pwm_urb;
+ if (urb) {
+ kfree(urb->transfer_buffer);
+ usb_free_urb(urb);
+ }
+ if (devpriv->ao_urbs) {
+ for (i = 0; i < devpriv->n_ao_urbs; i++) {
+ urb = devpriv->ao_urbs[i];
+ if (urb) {
+ kfree(urb->transfer_buffer);
+ usb_free_urb(urb);
+ }
+ }
+ kfree(devpriv->ao_urbs);
+ }
+ if (devpriv->ai_urbs) {
+ for (i = 0; i < devpriv->n_ai_urbs; i++) {
+ urb = devpriv->ai_urbs[i];
+ if (urb) {
+ kfree(urb->transfer_buffer);
+ usb_free_urb(urb);
+ }
+ }
+ kfree(devpriv->ai_urbs);
+ }
+ kfree(devpriv->insn_buf);
+ kfree(devpriv->in_buf);
+ kfree(devpriv->dux_commands);
+}
+
+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 void usbduxsigma_detach(struct comedi_device *dev)
+{
+ struct usb_interface *intf = comedi_to_usb_interface(dev);
+ struct usbduxsigma_private *devpriv = dev->private;
+
+ usb_set_intfdata(intf, NULL);
+
+ if (!devpriv)
+ return;
+
+ down(&devpriv->sem);
+
+ /* force unlink all urbs */
+ usbduxsigma_ai_stop(dev, 1);
+ usbduxsigma_ao_stop(dev, 1);
+ usbduxsigma_pwm_stop(dev, 1);
+
+ usbduxsigma_free_usb_buffers(dev);
+
+ up(&devpriv->sem);
+}
+
+static struct comedi_driver usbduxsigma_driver = {
+ .driver_name = "usbduxsigma",
+ .module = THIS_MODULE,
+ .auto_attach = usbduxsigma_auto_attach,
+ .detach = usbduxsigma_detach,
+};
+
+static int usbduxsigma_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ return comedi_usb_auto_config(intf, &usbduxsigma_driver, 0);
+}
+
+static const struct usb_device_id usbduxsigma_usb_table[] = {
+ { USB_DEVICE(0x13d8, 0x0020) },
+ { USB_DEVICE(0x13d8, 0x0021) },
+ { USB_DEVICE(0x13d8, 0x0022) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, usbduxsigma_usb_table);
+
+static struct usb_driver usbduxsigma_usb_driver = {
+ .name = "usbduxsigma",
+ .probe = usbduxsigma_usb_probe,
+ .disconnect = comedi_usb_auto_unconfig,
+ .id_table = usbduxsigma_usb_table,
+};
+module_comedi_usb_driver(usbduxsigma_driver, usbduxsigma_usb_driver);
+
+MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com");
+MODULE_DESCRIPTION("Stirling/ITL USB-DUX SIGMA -- Bernd.Porr@f2s.com");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(FIRMWARE);
Code Review / kvmfornfv.git / blobdiff