--- /dev/null
+/*
+ * usbdux.c
+ * Copyright (C) 2003-2014 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: usbdux
+ * Description: University of Stirling USB DAQ & INCITE Technology Limited
+ * Devices: [ITL] USB-DUX (usbdux)
+ * Author: Bernd Porr <mail@berndporr.me.uk>
+ * Updated: 10 Oct 2014
+ * Status: Stable
+ *
+ * Connection scheme for the counter at the digital port:
+ * 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1.
+ * The sampling rate of the counter is approximately 500Hz.
+ *
+ * Note that under USB2.0 the length of the channel list determines
+ * the max sampling rate. If you sample only one channel you get 8kHz
+ * sampling rate. If you sample two channels you get 4kHz and so on.
+ */
+
+/*
+ * 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.
+ *
+ * Bernd Porr
+ *
+ *
+ * Revision history:
+ * 0.94: D/A output should work now with any channel list combinations
+ * 0.95: .owner commented out for kernel vers below 2.4.19
+ * sanity checks in ai/ao_cmd
+ * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's
+ * attach final USB IDs
+ * moved memory allocation completely to the corresponding comedi
+ * functions firmware upload is by fxload and no longer by comedi (due to
+ * enumeration)
+ * 0.97: USB IDs received, adjusted table
+ * 0.98: SMP, locking, memory alloc: moved all usb memory alloc
+ * to the usb subsystem and moved all comedi related memory
+ * alloc to comedi.
+ * | kernel | registration | usbdux-usb | usbdux-comedi | comedi |
+ * 0.99: USB 2.0: changed protocol to isochronous transfer
+ * IRQ transfer is too buggy and too risky in 2.0
+ * for the high speed ISO transfer is now a working version
+ * available
+ * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA
+ * chipsets miss out IRQs. Deeper buffering is needed.
+ * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling
+ * rate.
+ * Firmware vers 1.00 is needed for this.
+ * Two 16 bit up/down/reset counter with a sampling rate of 1kHz
+ * And loads of cleaning up, in particular streamlining the
+ * bulk transfers.
+ * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4
+ * 1.2: added PWM support via EP4
+ * 2.0: PWM seems to be stable and is not interfering with the other functions
+ * 2.1: changed PWM API
+ * 2.2: added firmware kernel request to fix an udev problem
+ * 2.3: corrected a bug in bulk timeouts which were far too short
+ * 2.4: fixed a bug which causes the driver to hang when it ran out of data.
+ * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it.
+ *
+ */
+
+#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 "../comedi_usb.h"
+
+/* constants for firmware upload and download */
+#define USBDUX_FIRMWARE "usbdux_firmware.bin"
+#define USBDUX_FIRMWARE_MAX_LEN 0x2000
+#define USBDUX_FIRMWARE_CMD 0xa0
+#define VENDOR_DIR_IN 0xc0
+#define VENDOR_DIR_OUT 0x40
+#define USBDUX_CPU_CS 0xe600
+
+/* usbdux bulk transfer commands */
+#define USBDUX_CMD_MULT_AI 0
+#define USBDUX_CMD_AO 1
+#define USBDUX_CMD_DIO_CFG 2
+#define USBDUX_CMD_DIO_BITS 3
+#define USBDUX_CMD_SINGLE_AI 4
+#define USBDUX_CMD_TIMER_RD 5
+#define USBDUX_CMD_TIMER_WR 6
+#define USBDUX_CMD_PWM_ON 7
+#define USBDUX_CMD_PWM_OFF 8
+
+/* timeout for the USB-transfer in ms */
+#define BULK_TIMEOUT 1000
+
+/* 300Hz max frequ under PWM */
+#define MIN_PWM_PERIOD ((long)(1E9/300))
+
+/* Default PWM frequency */
+#define PWM_DEFAULT_PERIOD ((long)(1E9/100))
+
+/* Size of one A/D value */
+#define SIZEADIN ((sizeof(uint16_t)))
+
+/*
+ * Size of the input-buffer IN BYTES
+ * Always multiple of 8 for 8 microframes which is needed in the highspeed mode
+ */
+#define SIZEINBUF ((8*SIZEADIN))
+
+/* 16 bytes. */
+#define SIZEINSNBUF 16
+
+/* 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
+
+static const struct comedi_lrange range_usbdux_ai_range = {
+ 4, {
+ BIP_RANGE(4.096),
+ BIP_RANGE(4.096 / 2),
+ UNI_RANGE(4.096),
+ UNI_RANGE(4.096 / 2)
+ }
+};
+
+static const struct comedi_lrange range_usbdux_ao_range = {
+ 2, {
+ BIP_RANGE(4.096),
+ UNI_RANGE(4.096)
+ }
+};
+
+struct usbdux_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 */
+ __le16 *in_buf;
+ /* input buffer for single insn */
+ __le16 *insn_buf;
+
+ unsigned int high_speed:1;
+ unsigned int ai_cmd_running:1;
+ unsigned int ao_cmd_running:1;
+ unsigned int pwm_cmd_running:1;
+
+ /* time between samples in units of the timer */
+ unsigned int ai_timer;
+ unsigned int ao_timer;
+ /* counter between aquisitions */
+ 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 usbdux_unlink_urbs(struct urb **urbs, int num_urbs)
+{
+ int i;
+
+ for (i = 0; i < num_urbs; i++)
+ usb_kill_urb(urbs[i]);
+}
+
+static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink)
+{
+ struct usbdux_private *devpriv = dev->private;
+
+ if (do_unlink && devpriv->ai_urbs)
+ usbdux_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
+
+ devpriv->ai_cmd_running = 0;
+}
+
+static int usbdux_ai_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbdux_private *devpriv = dev->private;
+
+ /* prevent other CPUs from submitting new commands just now */
+ down(&devpriv->sem);
+ /* unlink only if the urb really has been submitted */
+ usbdux_ai_stop(dev, devpriv->ai_cmd_running);
+ up(&devpriv->sem);
+
+ return 0;
+}
+
+static void usbduxsub_ai_handle_urb(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct urb *urb)
+{
+ struct usbdux_private *devpriv = dev->private;
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ 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++) {
+ unsigned int range = CR_RANGE(cmd->chanlist[i]);
+ uint16_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 */
+ 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 in int-context! err=%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 usbduxsub_ai_isoc_irq(struct urb *urb)
+{
+ struct comedi_device *dev = urb->context;
+ struct comedi_subdevice *s = dev->read_subdev;
+ struct comedi_async *async = s->async;
+ struct usbdux_private *devpriv = dev->private;
+
+ /* 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);
+ usbduxsub_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");
+ usbduxsub_ai_handle_urb(dev, s, urb);
+ break;
+
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ECONNABORTED:
+ /* after an unlink command, unplug, ... etc */
+ async->events |= COMEDI_CB_ERROR;
+ break;
+
+ default:
+ /* a real error */
+ dev_err(dev->class_dev,
+ "Non-zero urb status received in ai intr context: %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)
+ usbdux_ai_stop(dev, 0);
+
+ comedi_event(dev, s);
+}
+
+static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink)
+{
+ struct usbdux_private *devpriv = dev->private;
+
+ if (do_unlink && devpriv->ao_urbs)
+ usbdux_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
+
+ devpriv->ao_cmd_running = 0;
+}
+
+static int usbdux_ao_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbdux_private *devpriv = dev->private;
+
+ /* prevent other CPUs from submitting a command just now */
+ down(&devpriv->sem);
+ /* unlink only if it is really running */
+ usbdux_ao_stop(dev, devpriv->ao_cmd_running);
+ up(&devpriv->sem);
+
+ return 0;
+}
+
+static void usbduxsub_ao_handle_urb(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct urb *urb)
+{
+ struct usbdux_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;
+ }
+
+ /* pointer to the DA */
+ *datap++ = val & 0xff;
+ *datap++ = (val >> 8) & 0xff;
+ *datap++ = chan << 6;
+ s->readback[chan] = val;
+ }
+ }
+
+ /* if command is still running, resubmit urb for BULK transfer */
+ 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,
+ "ao urb resubm failed in int-cont. ret=%d",
+ ret);
+ if (ret == -EL2NSYNC)
+ dev_err(dev->class_dev,
+ "buggy USB host controller or bug in IRQ handling!\n");
+ async->events |= COMEDI_CB_ERROR;
+ }
+ }
+}
+
+static void usbduxsub_ao_isoc_irq(struct urb *urb)
+{
+ struct comedi_device *dev = urb->context;
+ struct comedi_subdevice *s = dev->write_subdev;
+ struct comedi_async *async = s->async;
+ struct usbdux_private *devpriv = dev->private;
+
+ /* exit if not running a command, do not resubmit urb */
+ if (!devpriv->ao_cmd_running)
+ return;
+
+ switch (urb->status) {
+ case 0:
+ usbduxsub_ao_handle_urb(dev, s, urb);
+ break;
+
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ECONNABORTED:
+ /* after an unlink command, unplug, ... etc */
+ async->events |= COMEDI_CB_ERROR;
+ break;
+
+ default:
+ /* a real error */
+ dev_err(dev->class_dev,
+ "Non-zero urb status received in ao intr context: %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)
+ usbdux_ao_stop(dev, 0);
+
+ comedi_event(dev, s);
+}
+
+static int usbdux_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 usbdux_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 usbdux_ai_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_cmd *cmd)
+{
+ struct usbdux_private *this_usbduxsub = dev->private;
+ int err = 0, i;
+ unsigned int tmp_timer;
+
+ /* 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) {
+ if (this_usbduxsub->high_speed) {
+ /*
+ * In high speed mode microframes are possible.
+ * However, during one microframe we can roughly
+ * sample one channel. Thus, the more channels
+ * are in the channel list the more time we need.
+ */
+ i = 1;
+ /* find a power of 2 for the number of channels */
+ while (i < (cmd->chanlist_len))
+ i = i * 2;
+
+ err |= comedi_check_trigger_arg_min(&cmd->
+ scan_begin_arg,
+ 1000000 / 8 * i);
+ /* now calc the real sampling rate with all the
+ * rounding errors */
+ tmp_timer =
+ ((unsigned int)(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);
+ /*
+ * calc the real sampling rate with the rounding errors
+ */
+ tmp_timer = ((unsigned int)(cmd->scan_begin_arg /
+ 1000000)) * 1000000;
+ }
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg,
+ tmp_timer);
+ }
+
+ 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;
+
+ return 0;
+}
+
+/*
+ * creates the ADC command for the MAX1271
+ * range is the range value from comedi
+ */
+static uint8_t create_adc_command(unsigned int chan, unsigned int range)
+{
+ uint8_t p = (range <= 1);
+ uint8_t r = ((range % 2) == 0);
+
+ return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
+}
+
+static int send_dux_commands(struct comedi_device *dev, unsigned int cmd_type)
+{
+ struct usb_device *usb = comedi_to_usb_dev(dev);
+ struct usbdux_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 receive_dux_commands(struct comedi_device *dev, unsigned int command)
+{
+ struct usb_device *usb = comedi_to_usb_dev(dev);
+ struct usbdux_private *devpriv = dev->private;
+ int ret;
+ int nrec;
+ 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 (le16_to_cpu(devpriv->insn_buf[0]) == command)
+ return ret;
+ }
+ /* command not received */
+ return -EFAULT;
+}
+
+static int usbdux_ai_inttrig(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int trig_num)
+{
+ struct usbdux_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 = usbdux_submit_urbs(dev, devpriv->ai_urbs,
+ devpriv->n_ai_urbs, 1);
+ if (ret < 0) {
+ devpriv->ai_cmd_running = 0;
+ goto ai_trig_exit;
+ }
+ s->async->inttrig = NULL;
+ } else {
+ ret = -EBUSY;
+ }
+
+ai_trig_exit:
+ up(&devpriv->sem);
+ return ret;
+}
+
+static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+ struct usbdux_private *devpriv = dev->private;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ int len = cmd->chanlist_len;
+ int ret = -EBUSY;
+ int i;
+
+ /* block other CPUs from starting an ai_cmd */
+ down(&devpriv->sem);
+
+ if (devpriv->ai_cmd_running)
+ goto ai_cmd_exit;
+
+ devpriv->dux_commands[1] = len;
+ for (i = 0; i < len; ++i) {
+ unsigned int chan = CR_CHAN(cmd->chanlist[i]);
+ unsigned int range = CR_RANGE(cmd->chanlist[i]);
+
+ devpriv->dux_commands[i + 2] = create_adc_command(chan, range);
+ }
+
+ ret = send_dux_commands(dev, USBDUX_CMD_MULT_AI);
+ if (ret < 0)
+ goto ai_cmd_exit;
+
+ if (devpriv->high_speed) {
+ /*
+ * every channel gets a time window of 125us. Thus, if we
+ * sample all 8 channels we need 1ms. If we sample only one
+ * channel we need only 125us
+ */
+ devpriv->ai_interval = 1;
+ /* find a power of 2 for the interval */
+ while (devpriv->ai_interval < len)
+ devpriv->ai_interval *= 2;
+
+ devpriv->ai_timer = cmd->scan_begin_arg /
+ (125000 * devpriv->ai_interval);
+ } else {
+ /* interval always 1ms */
+ devpriv->ai_interval = 1;
+ devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
+ }
+ if (devpriv->ai_timer < 1) {
+ ret = -EINVAL;
+ goto ai_cmd_exit;
+ }
+
+ devpriv->ai_counter = devpriv->ai_timer;
+
+ if (cmd->start_src == TRIG_NOW) {
+ /* enable this acquisition operation */
+ devpriv->ai_cmd_running = 1;
+ ret = usbdux_submit_urbs(dev, devpriv->ai_urbs,
+ devpriv->n_ai_urbs, 1);
+ if (ret < 0) {
+ devpriv->ai_cmd_running = 0;
+ /* fixme: unlink here?? */
+ goto ai_cmd_exit;
+ }
+ s->async->inttrig = NULL;
+ } else {
+ /* TRIG_INT */
+ /* don't enable the acquision operation */
+ /* wait for an internal signal */
+ s->async->inttrig = usbdux_ai_inttrig;
+ }
+
+ai_cmd_exit:
+ up(&devpriv->sem);
+
+ return ret;
+}
+
+/* Mode 0 is used to get a single conversion on demand */
+static int usbdux_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int range = CR_RANGE(insn->chanspec);
+ unsigned int val;
+ int ret = -EBUSY;
+ int i;
+
+ down(&devpriv->sem);
+
+ if (devpriv->ai_cmd_running)
+ goto ai_read_exit;
+
+ /* set command for the first channel */
+ devpriv->dux_commands[1] = create_adc_command(chan, range);
+
+ /* adc commands */
+ ret = send_dux_commands(dev, USBDUX_CMD_SINGLE_AI);
+ if (ret < 0)
+ goto ai_read_exit;
+
+ for (i = 0; i < insn->n; i++) {
+ ret = receive_dux_commands(dev, USBDUX_CMD_SINGLE_AI);
+ if (ret < 0)
+ goto ai_read_exit;
+
+ val = le16_to_cpu(devpriv->insn_buf[1]);
+
+ /* bipolar data is two's-complement */
+ if (comedi_range_is_bipolar(s, range))
+ val ^= ((s->maxdata + 1) >> 1);
+
+ data[i] = val;
+ }
+
+ai_read_exit:
+ up(&devpriv->sem);
+
+ return ret ? ret : insn->n;
+}
+
+static int usbdux_ao_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_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 usbdux_ao_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int val = s->readback[chan];
+ __le16 *p = (__le16 *)&devpriv->dux_commands[2];
+ int ret = -EBUSY;
+ int i;
+
+ down(&devpriv->sem);
+
+ if (devpriv->ao_cmd_running)
+ goto ao_write_exit;
+
+ /* number of channels: 1 */
+ devpriv->dux_commands[1] = 1;
+ /* channel number */
+ devpriv->dux_commands[4] = chan << 6;
+
+ for (i = 0; i < insn->n; i++) {
+ val = data[i];
+
+ /* one 16 bit value */
+ *p = cpu_to_le16(val);
+
+ ret = send_dux_commands(dev, USBDUX_CMD_AO);
+ if (ret < 0)
+ goto ao_write_exit;
+
+ s->readback[chan] = val;
+ }
+
+ao_write_exit:
+ up(&devpriv->sem);
+
+ return ret ? ret : insn->n;
+}
+
+static int usbdux_ao_inttrig(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int trig_num)
+{
+ struct usbdux_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 = usbdux_submit_urbs(dev, devpriv->ao_urbs,
+ devpriv->n_ao_urbs, 0);
+ if (ret < 0) {
+ devpriv->ao_cmd_running = 0;
+ goto ao_trig_exit;
+ }
+ s->async->inttrig = NULL;
+ } else {
+ ret = -EBUSY;
+ }
+
+ao_trig_exit:
+ up(&devpriv->sem);
+ return ret;
+}
+
+static int usbdux_ao_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_cmd *cmd)
+{
+ struct usbdux_private *this_usbduxsub = dev->private;
+ int err = 0;
+ unsigned int flags;
+
+ if (!this_usbduxsub)
+ return -EFAULT;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
+
+ if (0) { /* (this_usbduxsub->high_speed) */
+ /* 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);
+
+ if (0) { /* (this_usbduxsub->high_speed) */
+ /*
+ * in usb-2.0 only one conversion it transmitted
+ * but with 8kHz/n
+ */
+ flags = TRIG_TIMER;
+ } else {
+ /*
+ * all conversion events happen simultaneously with
+ * a rate of 1kHz/n
+ */
+ flags = TRIG_NOW;
+ }
+ err |= comedi_check_trigger_src(&cmd->convert_src, flags);
+
+ 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) {
+ 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;
+
+ return 0;
+}
+
+static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+ struct usbdux_private *devpriv = dev->private;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ int ret = -EBUSY;
+
+ down(&devpriv->sem);
+
+ if (devpriv->ao_cmd_running)
+ goto ao_cmd_exit;
+
+ /* we count in steps of 1ms (125us) */
+ /* 125us mode not used yet */
+ if (0) { /* (devpriv->high_speed) */
+ /* 125us */
+ /* timing of the conversion itself: every 125 us */
+ devpriv->ao_timer = cmd->convert_arg / 125000;
+ } else {
+ /* 1ms */
+ /* timing of the scan: we get all channels at once */
+ devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
+ if (devpriv->ao_timer < 1) {
+ ret = -EINVAL;
+ goto ao_cmd_exit;
+ }
+ }
+
+ devpriv->ao_counter = devpriv->ao_timer;
+
+ if (cmd->start_src == TRIG_NOW) {
+ /* enable this acquisition operation */
+ devpriv->ao_cmd_running = 1;
+ ret = usbdux_submit_urbs(dev, devpriv->ao_urbs,
+ devpriv->n_ao_urbs, 0);
+ if (ret < 0) {
+ devpriv->ao_cmd_running = 0;
+ /* fixme: unlink here?? */
+ goto ao_cmd_exit;
+ }
+ s->async->inttrig = NULL;
+ } else {
+ /* TRIG_INT */
+ /* submit the urbs later */
+ /* wait for an internal signal */
+ s->async->inttrig = usbdux_ao_inttrig;
+ }
+
+ao_cmd_exit:
+ up(&devpriv->sem);
+
+ return ret;
+}
+
+static int usbdux_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 usbdux_dio_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_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;
+ devpriv->dux_commands[2] = s->state;
+
+ /*
+ * This command also tells the firmware to return
+ * the digital input lines.
+ */
+ ret = send_dux_commands(dev, USBDUX_CMD_DIO_BITS);
+ if (ret < 0)
+ goto dio_exit;
+ ret = receive_dux_commands(dev, USBDUX_CMD_DIO_BITS);
+ if (ret < 0)
+ goto dio_exit;
+
+ data[1] = le16_to_cpu(devpriv->insn_buf[1]);
+
+dio_exit:
+ up(&devpriv->sem);
+
+ return ret ? ret : insn->n;
+}
+
+static int usbdux_counter_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ int ret = 0;
+ int i;
+
+ down(&devpriv->sem);
+
+ for (i = 0; i < insn->n; i++) {
+ ret = send_dux_commands(dev, USBDUX_CMD_TIMER_RD);
+ if (ret < 0)
+ goto counter_read_exit;
+ ret = receive_dux_commands(dev, USBDUX_CMD_TIMER_RD);
+ if (ret < 0)
+ goto counter_read_exit;
+
+ data[i] = le16_to_cpu(devpriv->insn_buf[chan + 1]);
+ }
+
+counter_read_exit:
+ up(&devpriv->sem);
+
+ return ret ? ret : insn->n;
+}
+
+static int usbdux_counter_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ __le16 *p = (__le16 *)&devpriv->dux_commands[2];
+ int ret = 0;
+ int i;
+
+ down(&devpriv->sem);
+
+ devpriv->dux_commands[1] = chan;
+
+ for (i = 0; i < insn->n; i++) {
+ *p = cpu_to_le16(data[i]);
+
+ ret = send_dux_commands(dev, USBDUX_CMD_TIMER_WR);
+ if (ret < 0)
+ break;
+ }
+
+ up(&devpriv->sem);
+
+ return ret ? ret : insn->n;
+}
+
+static int usbdux_counter_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ /* nothing to do so far */
+ return 2;
+}
+
+static void usbduxsub_unlink_pwm_urbs(struct comedi_device *dev)
+{
+ struct usbdux_private *devpriv = dev->private;
+
+ usb_kill_urb(devpriv->pwm_urb);
+}
+
+static void usbdux_pwm_stop(struct comedi_device *dev, int do_unlink)
+{
+ struct usbdux_private *devpriv = dev->private;
+
+ if (do_unlink)
+ usbduxsub_unlink_pwm_urbs(dev);
+
+ devpriv->pwm_cmd_running = 0;
+}
+
+static int usbdux_pwm_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbdux_private *devpriv = dev->private;
+ int ret;
+
+ down(&devpriv->sem);
+ /* unlink only if it is really running */
+ usbdux_pwm_stop(dev, devpriv->pwm_cmd_running);
+ ret = send_dux_commands(dev, USBDUX_CMD_PWM_OFF);
+ up(&devpriv->sem);
+
+ return ret;
+}
+
+static void usbduxsub_pwm_irq(struct urb *urb)
+{
+ struct comedi_device *dev = urb->context;
+ struct usbdux_private *devpriv = dev->private;
+ int ret;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ECONNABORTED:
+ /*
+ * after an unlink command, unplug, ... etc
+ * no unlink needed here. Already shutting down.
+ */
+ if (devpriv->pwm_cmd_running)
+ usbdux_pwm_stop(dev, 0);
+
+ return;
+
+ default:
+ /* a real error */
+ if (devpriv->pwm_cmd_running) {
+ dev_err(dev->class_dev,
+ "Non-zero urb status received in pwm intr context: %d\n",
+ urb->status);
+ usbdux_pwm_stop(dev, 0);
+ }
+ return;
+ }
+
+ /* are we actually running? */
+ if (!devpriv->pwm_cmd_running)
+ return;
+
+ urb->transfer_buffer_length = devpriv->pwm_buf_sz;
+ urb->dev = comedi_to_usb_dev(dev);
+ urb->status = 0;
+ if (devpriv->pwm_cmd_running) {
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret < 0) {
+ dev_err(dev->class_dev,
+ "pwm urb resubm failed in int-cont. ret=%d",
+ ret);
+ if (ret == -EL2NSYNC)
+ dev_err(dev->class_dev,
+ "buggy USB host controller or bug in IRQ handling!\n");
+
+ /* don't do an unlink here */
+ usbdux_pwm_stop(dev, 0);
+ }
+ }
+}
+
+static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
+{
+ struct usb_device *usb = comedi_to_usb_dev(dev);
+ struct usbdux_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,
+ usbduxsub_pwm_irq,
+ dev);
+
+ return usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static int usbdux_pwm_period(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int period)
+{
+ struct usbdux_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 usbdux_pwm_start(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct usbdux_private *devpriv = dev->private;
+ int ret = 0;
+
+ down(&devpriv->sem);
+
+ if (devpriv->pwm_cmd_running)
+ goto pwm_start_exit;
+
+ devpriv->dux_commands[1] = devpriv->pwm_delay;
+ ret = send_dux_commands(dev, USBDUX_CMD_PWM_ON);
+ if (ret < 0)
+ goto pwm_start_exit;
+
+ /* initialise the buffer */
+ memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
+
+ devpriv->pwm_cmd_running = 1;
+ ret = usbduxsub_submit_pwm_urbs(dev);
+ if (ret < 0)
+ devpriv->pwm_cmd_running = 0;
+
+pwm_start_exit:
+ up(&devpriv->sem);
+
+ return ret;
+}
+
+static void usbdux_pwm_pattern(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int chan,
+ unsigned int value,
+ unsigned int sign)
+{
+ struct usbdux_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 usbdux_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.
+ */
+ usbdux_pwm_pattern(dev, s, chan, data[0], 0);
+
+ return insn->n;
+}
+
+static int usbdux_pwm_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct usbdux_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 usbdux_pwm_start(dev, s);
+ case INSN_CONFIG_DISARM:
+ return usbdux_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 usbdux_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)
+ */
+ usbdux_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 here */
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static int usbdux_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 > USBDUX_FIRMWARE_MAX_LEN) {
+ dev_err(dev->class_dev,
+ "usbdux firmware binary it 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),
+ USBDUX_FIRMWARE_CMD,
+ VENDOR_DIR_OUT,
+ USBDUX_CPU_CS, 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),
+ USBDUX_FIRMWARE_CMD,
+ 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),
+ USBDUX_FIRMWARE_CMD,
+ VENDOR_DIR_OUT,
+ USBDUX_CPU_CS, 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 usbdux_alloc_usb_buffers(struct comedi_device *dev)
+{
+ struct usb_device *usb = comedi_to_usb_dev(dev);
+ struct usbdux_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(void *),
+ GFP_KERNEL);
+ devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(void *),
+ 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;
+ urb->context = dev;
+ 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 = usbduxsub_ai_isoc_irq;
+ 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;
+ urb->context = dev;
+ 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 = usbduxsub_ao_isoc_irq;
+ 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 */
+ }
+
+ /* pwm */
+ if (devpriv->pwm_buf_sz) {
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb)
+ return -ENOMEM;
+ devpriv->pwm_urb = urb;
+
+ /* max bulk ep size in high speed */
+ urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
+ GFP_KERNEL);
+ if (!urb->transfer_buffer)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void usbdux_free_usb_buffers(struct comedi_device *dev)
+{
+ struct usbdux_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 usbdux_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 usbdux_private *devpriv;
+ struct comedi_subdevice *s;
+ 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 = usbdux_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, USBDUX_FIRMWARE,
+ usbdux_firmware_upload, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 5 : 4);
+ 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;
+ s->n_chan = 8;
+ s->maxdata = 0x0fff;
+ s->len_chanlist = 8;
+ s->range_table = &range_usbdux_ai_range;
+ s->insn_read = usbdux_ai_insn_read;
+ s->do_cmdtest = usbdux_ai_cmdtest;
+ s->do_cmd = usbdux_ai_cmd;
+ s->cancel = usbdux_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->maxdata = 0x0fff;
+ s->len_chanlist = s->n_chan;
+ s->range_table = &range_usbdux_ao_range;
+ s->do_cmdtest = usbdux_ao_cmdtest;
+ s->do_cmd = usbdux_ao_cmd;
+ s->cancel = usbdux_ao_cancel;
+ s->insn_read = usbdux_ao_insn_read;
+ s->insn_write = usbdux_ao_insn_write;
+
+ 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 = 8;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = usbdux_dio_insn_bits;
+ s->insn_config = usbdux_dio_insn_config;
+
+ /* Counter subdevice */
+ s = &dev->subdevices[3];
+ s->type = COMEDI_SUBD_COUNTER;
+ s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
+ s->n_chan = 4;
+ s->maxdata = 0xffff;
+ s->insn_read = usbdux_counter_read;
+ s->insn_write = usbdux_counter_write;
+ s->insn_config = usbdux_counter_config;
+
+ if (devpriv->high_speed) {
+ /* PWM subdevice */
+ s = &dev->subdevices[4];
+ 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 = usbdux_pwm_write;
+ s->insn_config = usbdux_pwm_config;
+
+ usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
+ }
+
+ return 0;
+}
+
+static void usbdux_detach(struct comedi_device *dev)
+{
+ struct usb_interface *intf = comedi_to_usb_interface(dev);
+ struct usbdux_private *devpriv = dev->private;
+
+ usb_set_intfdata(intf, NULL);
+
+ if (!devpriv)
+ return;
+
+ down(&devpriv->sem);
+
+ /* force unlink all urbs */
+ usbdux_pwm_stop(dev, 1);
+ usbdux_ao_stop(dev, 1);
+ usbdux_ai_stop(dev, 1);
+
+ usbdux_free_usb_buffers(dev);
+
+ up(&devpriv->sem);
+}
+
+static struct comedi_driver usbdux_driver = {
+ .driver_name = "usbdux",
+ .module = THIS_MODULE,
+ .auto_attach = usbdux_auto_attach,
+ .detach = usbdux_detach,
+};
+
+static int usbdux_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ return comedi_usb_auto_config(intf, &usbdux_driver, 0);
+}
+
+static const struct usb_device_id usbdux_usb_table[] = {
+ { USB_DEVICE(0x13d8, 0x0001) },
+ { USB_DEVICE(0x13d8, 0x0002) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, usbdux_usb_table);
+
+static struct usb_driver usbdux_usb_driver = {
+ .name = "usbdux",
+ .probe = usbdux_usb_probe,
+ .disconnect = comedi_usb_auto_unconfig,
+ .id_table = usbdux_usb_table,
+};
+module_comedi_usb_driver(usbdux_driver, usbdux_usb_driver);
+
+MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com");
+MODULE_DESCRIPTION("Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(USBDUX_FIRMWARE);
Code Review / kvmfornfv.git / blobdiff