Staging: comedi: add usb usbduxfast driver
ITL USB-DUXfast driver
From: Bernd Porr <BerndPorr@f2s.com>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/comedi/drivers/Makefile b/drivers/staging/comedi/drivers/Makefile
index 6b38d83..fcf6bcf 100644
--- a/drivers/staging/comedi/drivers/Makefile
+++ b/drivers/staging/comedi/drivers/Makefile
@@ -9,3 +9,4 @@
# Comedi USB drivers
obj-$(CONFIG_COMEDI_USB_DRIVERS) += usbdux.o
+obj-$(CONFIG_COMEDI_USB_DRIVERS) += usbduxfast.o
diff --git a/drivers/staging/comedi/drivers/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
new file mode 100644
index 0000000..403a614
--- /dev/null
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -0,0 +1,1779 @@
+#define DRIVER_VERSION "v0.99a"
+#define DRIVER_AUTHOR "Bernd Porr, BerndPorr@f2s.com"
+#define DRIVER_DESC "USB-DUXfast, BerndPorr@f2s.com"
+/*
+ comedi/drivers/usbduxfast.c
+ Copyright (C) 2004 Bernd Porr, Bernd.Porr@f2s.com
+
+ 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+Driver: usbduxfast
+Description: ITL USB-DUXfast
+Devices: [ITL] USB-DUX (usbduxfast.o)
+Author: Bernd Porr <BerndPorr@f2s.com>
+Updated: 04 Dec 2006
+Status: testing
+*/
+
+/*
+ * 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:
+ * 0.9: Dropping the first data packet which seems to be from the last transfer.
+ * Buffer overflows in the FX2 are handed over to comedi.
+ * 0.92: Dropping now 4 packets. The quad buffer has to be emptied.
+ * Added insn command basically for testing. Sample rate is 1MHz/16ch=62.5kHz
+ * 0.99: Ian Abbott pointed out a bug which has been corrected. Thanks!
+ * 0.99a: added external trigger.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/smp_lock.h>
+#include <linux/fcntl.h>
+#include <linux/compiler.h>
+#include "comedi_fc.h"
+#include "../comedidev.h"
+#include "../usb.h"
+
+// (un)comment this if you want to have debug info.
+//#define CONFIG_COMEDI_DEBUG
+#undef CONFIG_COMEDI_DEBUG
+
+#define BOARDNAME "usbduxfast"
+
+// timeout for the USB-transfer
+#define EZTIMEOUT 30
+
+// constants for "firmware" upload and download
+#define USBDUXFASTSUB_FIRMWARE 0xA0
+#define VENDOR_DIR_IN 0xC0
+#define VENDOR_DIR_OUT 0x40
+
+// internal adresses of the 8051 processor
+#define USBDUXFASTSUB_CPUCS 0xE600
+
+// max lenghth of the transfer-buffer for software upload
+#define TB_LEN 0x2000
+
+// Input endpoint number
+#define BULKINEP 6
+
+// Endpoint for the A/D channellist: bulk OUT
+#define CHANNELLISTEP 4
+
+// Number of channels
+#define NUMCHANNELS 32
+
+// size of the waveform descriptor
+#define WAVESIZE 0x20
+
+// Size of one A/D value
+#define SIZEADIN ((sizeof(int16_t)))
+
+// Size of the input-buffer IN BYTES
+#define SIZEINBUF 512
+
+// 16 bytes.
+#define SIZEINSNBUF 512
+
+// Size of the buffer for the dux commands
+#define SIZEOFDUXBUFFER 256 // bytes
+
+// Number of in-URBs which receive the data: min=5
+#define NUMOFINBUFFERSHIGH 10
+
+// Total number of usbduxfast devices
+#define NUMUSBDUXFAST 16
+
+// Number of subdevices
+#define N_SUBDEVICES 1
+
+// Analogue in subdevice
+#define SUBDEV_AD 0
+
+// min delay steps for more than one channel
+// basically when the mux gives up. ;-)
+#define MIN_SAMPLING_PERIOD 9 // steps at 30MHz in the FX2
+
+// Max number of 1/30MHz delay steps:
+#define MAX_SAMPLING_PERIOD 500
+
+// Number of received packets to ignore before we start handing data over to comedi.
+// It's quad buffering and we have to ignore 4 packets.
+#define PACKETS_TO_IGNORE 4
+
+/////////////////////////////////////////////
+// comedi constants
+static const comedi_lrange range_usbduxfast_ai_range = { 2, {
+ BIP_RANGE(0.75),
+ BIP_RANGE(0.5),
+ }
+};
+
+/*
+ * private structure of one subdevice
+ */
+
+// This is the structure which holds all the data of this driver
+// one sub device just now: A/D
+typedef struct {
+ // attached?
+ int attached;
+ // is it associated with a subdevice?
+ int probed;
+ // pointer to the usb-device
+ struct usb_device *usbdev;
+ // BULK-transfer handling: urb
+ struct urb *urbIn;
+ int8_t *transfer_buffer;
+ // input buffer for single insn
+ int16_t *insnBuffer;
+ // interface number
+ int ifnum;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+ // interface structure in 2.6
+ struct usb_interface *interface;
+#endif
+ // comedi device for the interrupt context
+ comedi_device *comedidev;
+ // asynchronous command is running
+ short int ai_cmd_running;
+ // continous aquisition
+ short int ai_continous;
+ // number of samples to aquire
+ long int ai_sample_count;
+ // commands
+ uint8_t *dux_commands;
+ // counter which ignores the first buffers
+ int ignore;
+ struct semaphore sem;
+} usbduxfastsub_t;
+
+// The pointer to the private usb-data of the driver
+// is also the private data for the comedi-device.
+// This has to be global as the usb subsystem needs
+// global variables. The other reason is that this
+// structure must be there _before_ any comedi
+// command is issued. The usb subsystem must be
+// initialised before comedi can access it.
+static usbduxfastsub_t usbduxfastsub[NUMUSBDUXFAST];
+
+static DECLARE_MUTEX(start_stop_sem);
+
+// bulk transfers to usbduxfast
+
+#define SENDADCOMMANDS 0
+#define SENDINITEP6 1
+
+static int send_dux_commands(usbduxfastsub_t * this_usbduxfastsub, int cmd_type)
+{
+ int result, nsent;
+ this_usbduxfastsub->dux_commands[0] = cmd_type;
+#ifdef CONFIG_COMEDI_DEBUG
+ int i;
+ printk("comedi%d: usbduxfast: dux_commands: ",
+ this_usbduxfastsub->comedidev->minor);
+ for (i = 0; i < SIZEOFDUXBUFFER; i++) {
+ printk(" %02x", this_usbduxfastsub->dux_commands[i]);
+ }
+ printk("\n");
+#endif
+ result = USB_BULK_MSG(this_usbduxfastsub->usbdev,
+ usb_sndbulkpipe(this_usbduxfastsub->usbdev,
+ CHANNELLISTEP),
+ this_usbduxfastsub->dux_commands,
+ SIZEOFDUXBUFFER, &nsent, 10000);
+ if (result < 0) {
+ printk("comedi%d: could not transmit dux_commands to the usb-device, err=%d\n", this_usbduxfastsub->comedidev->minor, result);
+ }
+ return result;
+}
+
+// Stops the data acquision
+// It should be safe to call this function from any context
+static int usbduxfastsub_unlink_InURBs(usbduxfastsub_t * usbduxfastsub_tmp)
+{
+ int j = 0;
+ int err = 0;
+
+ if (usbduxfastsub_tmp && usbduxfastsub_tmp->urbIn) {
+ usbduxfastsub_tmp->ai_cmd_running = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8)
+ j = usb_unlink_urb(usbduxfastsub_tmp->urbIn);
+ if (j < 0) {
+ err = j;
+ }
+#else
+ // waits until a running transfer is over
+ usb_kill_urb(usbduxfastsub_tmp->urbIn);
+ j = 0;
+#endif
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi: usbduxfast: unlinked InURB: res=%d\n", j);
+#endif
+ return err;
+}
+
+/* This will stop a running acquisition operation */
+// Is called from within this driver from both the
+// interrupt context and from comedi
+static int usbduxfast_ai_stop(usbduxfastsub_t * this_usbduxfastsub,
+ int do_unlink)
+{
+ int ret = 0;
+
+ if (!this_usbduxfastsub) {
+ printk("comedi?: usbduxfast_ai_stop: this_usbduxfastsub=NULL!\n");
+ return -EFAULT;
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi: usbduxfast_ai_stop\n");
+#endif
+
+ this_usbduxfastsub->ai_cmd_running = 0;
+
+ if (do_unlink) {
+ // stop aquistion
+ ret = usbduxfastsub_unlink_InURBs(this_usbduxfastsub);
+ }
+
+ return ret;
+}
+
+// This will cancel a running acquisition operation.
+// This is called by comedi but never from inside the
+// driver.
+static int usbduxfast_ai_cancel(comedi_device * dev, comedi_subdevice * s)
+{
+ usbduxfastsub_t *this_usbduxfastsub;
+ int res = 0;
+
+ // force unlink of all urbs
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi: usbduxfast_ai_cancel\n");
+#endif
+ this_usbduxfastsub = dev->private;
+ if (!this_usbduxfastsub) {
+ printk("comedi: usbduxfast_ai_cancel: this_usbduxfastsub=NULL\n");
+ return -EFAULT;
+ }
+ down(&this_usbduxfastsub->sem);
+ if (!(this_usbduxfastsub->probed)) {
+ up(&this_usbduxfastsub->sem);
+ return -ENODEV;
+ }
+ // unlink
+ res = usbduxfast_ai_stop(this_usbduxfastsub, 1);
+ up(&this_usbduxfastsub->sem);
+
+ return res;
+}
+
+// analogue IN
+// interrupt service routine
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+static void usbduxfastsub_ai_Irq(struct urb *urb)
+#else
+static void usbduxfastsub_ai_Irq(struct urb *urb PT_REGS_ARG)
+#endif
+{
+ int n, err;
+ usbduxfastsub_t *this_usbduxfastsub;
+ comedi_device *this_comedidev;
+ comedi_subdevice *s;
+ uint16_t *p;
+
+ // sanity checks
+ // is the urb there?
+ if (!urb) {
+ printk("comedi_: usbduxfast_: ao int-handler called with urb=NULL!\n");
+ return;
+ }
+ // the context variable points to the subdevice
+ this_comedidev = urb->context;
+ if (!this_comedidev) {
+ printk("comedi_: usbduxfast_: urb context is a NULL pointer!\n");
+ return;
+ }
+ // the private structure of the subdevice is usbduxfastsub_t
+ this_usbduxfastsub = this_comedidev->private;
+ if (!this_usbduxfastsub) {
+ printk("comedi_: usbduxfast_: private of comedi subdev is a NULL pointer!\n");
+ return;
+ }
+ // are we running a command?
+ if (unlikely(!(this_usbduxfastsub->ai_cmd_running))) {
+ // not running a command
+ // do not continue execution if no asynchronous command is running
+ // in particular not resubmit
+ return;
+ }
+
+ if (unlikely(!(this_usbduxfastsub->attached))) {
+ // no comedi device there
+ return;
+ }
+ // subdevice which is the AD converter
+ s = this_comedidev->subdevices + SUBDEV_AD;
+
+ // first we test if something unusual has just happened
+ switch (urb->status) {
+ case 0:
+ break;
+
+ // happens after an unlink command or when the device is plugged out
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ECONNABORTED:
+ // tell this comedi
+ s->async->events |= COMEDI_CB_EOA;
+ s->async->events |= COMEDI_CB_ERROR;
+ comedi_event(this_usbduxfastsub->comedidev, s);
+ // stop the transfer w/o unlink
+ usbduxfast_ai_stop(this_usbduxfastsub, 0);
+ return;
+
+ default:
+ printk("comedi%d: usbduxfast: non-zero urb status received in ai intr context: %d\n", this_usbduxfastsub->comedidev->minor, urb->status);
+ s->async->events |= COMEDI_CB_EOA;
+ s->async->events |= COMEDI_CB_ERROR;
+ comedi_event(this_usbduxfastsub->comedidev, s);
+ usbduxfast_ai_stop(this_usbduxfastsub, 0);
+ return;
+ }
+
+ p = urb->transfer_buffer;
+ if (!this_usbduxfastsub->ignore) {
+ if (!(this_usbduxfastsub->ai_continous)) {
+ // not continous, fixed number of samples
+ n = urb->actual_length / sizeof(uint16_t);
+ if (unlikely(this_usbduxfastsub->ai_sample_count < n)) {
+ // we have send only a fraction of the bytes received
+ cfc_write_array_to_buffer(s,
+ urb->transfer_buffer,
+ this_usbduxfastsub->ai_sample_count *
+ sizeof(uint16_t));
+ usbduxfast_ai_stop(this_usbduxfastsub, 0);
+ // say comedi that the acquistion is over
+ s->async->events |= COMEDI_CB_EOA;
+ comedi_event(this_usbduxfastsub->comedidev, s);
+ return;
+ }
+ this_usbduxfastsub->ai_sample_count -= n;
+ }
+ // write the full buffer to comedi
+ cfc_write_array_to_buffer(s,
+ urb->transfer_buffer, urb->actual_length);
+
+ // tell comedi that data is there
+ comedi_event(this_usbduxfastsub->comedidev, s);
+
+ } else {
+ // ignore this packet
+ this_usbduxfastsub->ignore--;
+ }
+
+ // command is still running
+ // resubmit urb for BULK transfer
+ urb->dev = this_usbduxfastsub->usbdev;
+ urb->status = 0;
+ if ((err = USB_SUBMIT_URB(urb)) < 0) {
+ printk("comedi%d: usbduxfast: urb resubm failed: %d",
+ this_usbduxfastsub->comedidev->minor, err);
+ s->async->events |= COMEDI_CB_EOA;
+ s->async->events |= COMEDI_CB_ERROR;
+ comedi_event(this_usbduxfastsub->comedidev, s);
+ usbduxfast_ai_stop(this_usbduxfastsub, 0);
+ }
+}
+
+static int usbduxfastsub_start(usbduxfastsub_t * usbduxfastsub)
+{
+ int errcode = 0;
+ unsigned char local_transfer_buffer[16];
+
+ if (usbduxfastsub->probed) {
+ // 7f92 to zero
+ local_transfer_buffer[0] = 0;
+ errcode = USB_CONTROL_MSG(usbduxfastsub->usbdev,
+ // create a pipe for a control transfer
+ usb_sndctrlpipe(usbduxfastsub->usbdev, 0),
+ // bRequest, "Firmware"
+ USBDUXFASTSUB_FIRMWARE,
+ // bmRequestType
+ VENDOR_DIR_OUT,
+ // Value
+ USBDUXFASTSUB_CPUCS,
+ // Index
+ 0x0000,
+ // address of the transfer buffer
+ local_transfer_buffer,
+ // Length
+ 1,
+ // Timeout
+ EZTIMEOUT);
+ if (errcode < 0) {
+ printk("comedi_: usbduxfast_: control msg failed (start)\n");
+ return errcode;
+ }
+ }
+ return 0;
+}
+
+static int usbduxfastsub_stop(usbduxfastsub_t * usbduxfastsub)
+{
+ int errcode = 0;
+
+ unsigned char local_transfer_buffer[16];
+ if (usbduxfastsub->probed) {
+ // 7f92 to one
+ local_transfer_buffer[0] = 1;
+ errcode = USB_CONTROL_MSG
+ (usbduxfastsub->usbdev,
+ usb_sndctrlpipe(usbduxfastsub->usbdev, 0),
+ // bRequest, "Firmware"
+ USBDUXFASTSUB_FIRMWARE,
+ // bmRequestType
+ VENDOR_DIR_OUT,
+ // Value
+ USBDUXFASTSUB_CPUCS,
+ // Index
+ 0x0000, local_transfer_buffer,
+ // Length
+ 1,
+ // Timeout
+ EZTIMEOUT);
+ if (errcode < 0) {
+ printk("comedi_: usbduxfast: control msg failed (stop)\n");
+ return errcode;
+ }
+ }
+ return 0;
+}
+
+static int usbduxfastsub_upload(usbduxfastsub_t * usbduxfastsub,
+ unsigned char *local_transfer_buffer,
+ unsigned int startAddr, unsigned int len)
+{
+ int errcode;
+
+ if (usbduxfastsub->probed) {
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast: uploading %d bytes",
+ usbduxfastsub->comedidev->minor, len);
+ printk(" to addr %d, first byte=%d.\n",
+ startAddr, local_transfer_buffer[0]);
+#endif
+ errcode = USB_CONTROL_MSG
+ (usbduxfastsub->usbdev,
+ usb_sndctrlpipe(usbduxfastsub->usbdev, 0),
+ // brequest, firmware
+ USBDUXFASTSUB_FIRMWARE,
+ // bmRequestType
+ VENDOR_DIR_OUT,
+ // value
+ startAddr,
+ // index
+ 0x0000,
+ // our local safe buffer
+ local_transfer_buffer,
+ // length
+ len,
+ // timeout
+ EZTIMEOUT);
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast: result=%d\n", errcode);
+#endif
+ if (errcode < 0) {
+ printk("comedi_: usbduxfast: uppload failed\n");
+ return errcode;
+ }
+ } else {
+ // no device on the bus for this index
+ return -EFAULT;
+ }
+ return 0;
+}
+
+int firmwareUpload(usbduxfastsub_t * usbduxfastsub,
+ unsigned char *firmwareBinary, int sizeFirmware)
+{
+ int ret;
+
+ if (!firmwareBinary) {
+ return 0;
+ }
+ ret = usbduxfastsub_stop(usbduxfastsub);
+ if (ret < 0) {
+ printk("comedi_: usbduxfast: can not stop firmware\n");
+ return ret;
+ }
+ ret = usbduxfastsub_upload(usbduxfastsub,
+ firmwareBinary, 0, sizeFirmware);
+ if (ret < 0) {
+ printk("comedi_: usbduxfast: firmware upload failed\n");
+ return ret;
+ }
+ ret = usbduxfastsub_start(usbduxfastsub);
+ if (ret < 0) {
+ printk("comedi_: usbduxfast: can not start firmware\n");
+ return ret;
+ }
+ return 0;
+}
+
+int usbduxfastsub_submit_InURBs(usbduxfastsub_t * usbduxfastsub)
+{
+ int errFlag;
+
+ if (!usbduxfastsub) {
+ return -EFAULT;
+ }
+ usb_fill_bulk_urb(usbduxfastsub->urbIn,
+ usbduxfastsub->usbdev,
+ usb_rcvbulkpipe(usbduxfastsub->usbdev, BULKINEP),
+ usbduxfastsub->transfer_buffer,
+ SIZEINBUF, usbduxfastsub_ai_Irq, usbduxfastsub->comedidev);
+
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast: submitting in-urb: %x,%x\n",
+ usbduxfastsub->comedidev->minor,
+ (int)(usbduxfastsub->urbIn->context),
+ (int)(usbduxfastsub->urbIn->dev));
+#endif
+ errFlag = USB_SUBMIT_URB(usbduxfastsub->urbIn);
+ if (errFlag) {
+ printk("comedi_: usbduxfast: ai: ");
+ printk("USB_SUBMIT_URB");
+ printk(" error %d\n", errFlag);
+ return errFlag;
+ }
+ return 0;
+}
+
+static int usbduxfast_ai_cmdtest(comedi_device * dev,
+ comedi_subdevice * s, comedi_cmd * cmd)
+{
+ int err = 0, stop_mask = 0;
+ long int steps, tmp = 0;
+ int minSamplPer;
+ usbduxfastsub_t *this_usbduxfastsub = dev->private;
+ if (!(this_usbduxfastsub->probed)) {
+ return -ENODEV;
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast_ai_cmdtest\n", dev->minor);
+ printk("comedi%d: usbduxfast: convert_arg=%u scan_begin_arg=%u\n",
+ dev->minor, cmd->convert_arg, cmd->scan_begin_arg);
+#endif
+ /* step 1: make sure trigger sources are trivially valid */
+
+ tmp = cmd->start_src;
+ cmd->start_src &= TRIG_NOW | TRIG_EXT | TRIG_INT;
+ if (!cmd->start_src || tmp != cmd->start_src)
+ err++;
+
+ tmp = cmd->scan_begin_src;
+ cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW | TRIG_EXT;
+ if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+ err++;
+
+ tmp = cmd->convert_src;
+ cmd->convert_src &= TRIG_TIMER | TRIG_EXT;
+ if (!cmd->convert_src || tmp != cmd->convert_src)
+ err++;
+
+ tmp = cmd->scan_end_src;
+ cmd->scan_end_src &= TRIG_COUNT;
+ if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
+ err++;
+
+ tmp = cmd->stop_src;
+ stop_mask = TRIG_COUNT | TRIG_NONE;
+ cmd->stop_src &= stop_mask;
+ if (!cmd->stop_src || tmp != cmd->stop_src)
+ err++;
+
+ if (err)
+ return 1;
+
+ /* step 2: make sure trigger sources are unique and mutually compatible */
+
+ if (cmd->start_src != TRIG_NOW &&
+ cmd->start_src != TRIG_EXT && cmd->start_src != TRIG_INT)
+ err++;
+ if (cmd->scan_begin_src != TRIG_TIMER &&
+ cmd->scan_begin_src != TRIG_FOLLOW &&
+ cmd->scan_begin_src != TRIG_EXT)
+ err++;
+ if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
+ err++;
+ if (cmd->stop_src != TRIG_COUNT &&
+ cmd->stop_src != TRIG_EXT && cmd->stop_src != TRIG_NONE)
+ err++;
+
+ // can't have external stop and start triggers at once
+ if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT)
+ err++;
+
+ if (err)
+ return 2;
+
+ /* step 3: make sure arguments are trivially compatible */
+
+ if (cmd->start_src == TRIG_NOW && cmd->start_arg != 0) {
+ cmd->start_arg = 0;
+ err++;
+ }
+
+ if (!cmd->chanlist_len) {
+ err++;
+ }
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+
+ if (cmd->chanlist_len == 1) {
+ minSamplPer = 1;
+ } else {
+ minSamplPer = MIN_SAMPLING_PERIOD;
+ }
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ steps = cmd->convert_arg * 30;
+ if (steps < (minSamplPer * 1000)) {
+ steps = minSamplPer * 1000;
+ }
+ if (steps > (MAX_SAMPLING_PERIOD * 1000)) {
+ steps = MAX_SAMPLING_PERIOD * 1000;
+ }
+ // calc arg again
+ tmp = steps / 30;
+ if (cmd->convert_arg != tmp) {
+ cmd->convert_arg = tmp;
+ err++;
+ }
+ }
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ err++;
+ }
+ // stop source
+ switch (cmd->stop_src) {
+ case TRIG_COUNT:
+ if (!cmd->stop_arg) {
+ cmd->stop_arg = 1;
+ err++;
+ }
+ break;
+ case TRIG_NONE:
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ break;
+ // TRIG_EXT doesn't care since it doesn't trigger off a numbered channel
+ default:
+ break;
+ }
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up any arguments */
+
+ return 0;
+
+}
+
+static int usbduxfast_ai_inttrig(comedi_device * dev,
+ comedi_subdevice * s, unsigned int trignum)
+{
+ int ret;
+ usbduxfastsub_t *this_usbduxfastsub = dev->private;
+ if (!this_usbduxfastsub) {
+ return -EFAULT;
+ }
+ down(&this_usbduxfastsub->sem);
+ if (!(this_usbduxfastsub->probed)) {
+ up(&this_usbduxfastsub->sem);
+ return -ENODEV;
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast_ai_inttrig\n", dev->minor);
+#endif
+
+ if (trignum != 0) {
+ printk("comedi%d: usbduxfast_ai_inttrig: invalid trignum\n",
+ dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ if (!(this_usbduxfastsub->ai_cmd_running)) {
+ this_usbduxfastsub->ai_cmd_running = 1;
+ ret = usbduxfastsub_submit_InURBs(this_usbduxfastsub);
+ if (ret < 0) {
+ printk("comedi%d: usbduxfast_ai_inttrig: urbSubmit: err=%d\n", dev->minor, ret);
+ this_usbduxfastsub->ai_cmd_running = 0;
+ up(&this_usbduxfastsub->sem);
+ return ret;
+ }
+ s->async->inttrig = NULL;
+ } else {
+ printk("comedi%d: ai_inttrig but acqu is already running\n",
+ dev->minor);
+ }
+ up(&this_usbduxfastsub->sem);
+ return 1;
+}
+
+// offsets for the GPIF bytes
+// the first byte is the command byte
+#define LENBASE 1+0x00
+#define OPBASE 1+0x08
+#define OUTBASE 1+0x10
+#define LOGBASE 1+0x18
+
+static int usbduxfast_ai_cmd(comedi_device * dev, comedi_subdevice * s)
+{
+ comedi_cmd *cmd = &s->async->cmd;
+ unsigned int chan, gain, rngmask = 0xff;
+ int i, j, ret;
+ usbduxfastsub_t *this_usbduxfastsub = dev->private;
+ int result;
+ long steps, steps_tmp;
+
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast_ai_cmd\n", dev->minor);
+#endif
+ if (!this_usbduxfastsub) {
+ return -EFAULT;
+ }
+ down(&this_usbduxfastsub->sem);
+ if (!(this_usbduxfastsub->probed)) {
+ up(&this_usbduxfastsub->sem);
+ return -ENODEV;
+ }
+ if (this_usbduxfastsub->ai_cmd_running) {
+ printk("comedi%d: ai_cmd not possible. Another ai_cmd is running.\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EBUSY;
+ }
+ // set current channel of the running aquisition to zero
+ s->async->cur_chan = 0;
+
+ // ignore the first buffers from the device if there is an error condition
+ this_usbduxfastsub->ignore = PACKETS_TO_IGNORE;
+
+ if (cmd->chanlist_len > 0) {
+ gain = CR_RANGE(cmd->chanlist[0]);
+ for (i = 0; i < cmd->chanlist_len; ++i) {
+ chan = CR_CHAN(cmd->chanlist[i]);
+ if (chan != i) {
+ printk("comedi%d: cmd is accepting only consecutive channels.\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ if ((gain != CR_RANGE(cmd->chanlist[i]))
+ && (cmd->chanlist_len > 3)) {
+ printk("comedi%d: the gain must be the same for all channels.\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ if (i >= NUMCHANNELS) {
+ printk("comedi%d: channel list too long\n",
+ dev->minor);
+ break;
+ }
+ }
+ }
+ steps = 0;
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ printk("comedi%d: usbduxfast: scan_begin_src==TRIG_TIMER not valid.\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ if (cmd->convert_src == TRIG_TIMER) {
+ steps = (cmd->convert_arg * 30) / 1000;
+ }
+ if ((steps < MIN_SAMPLING_PERIOD) && (cmd->chanlist_len != 1)) {
+ printk("comedi%d: usbduxfast: ai_cmd: steps=%ld, scan_begin_arg=%d. Not properly tested by cmdtest?\n", dev->minor, steps, cmd->scan_begin_arg);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ if (steps > MAX_SAMPLING_PERIOD) {
+ printk("comedi%d: usbduxfast: ai_cmd: sampling rate too low.\n",
+ dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ if ((cmd->start_src == TRIG_EXT) && (cmd->chanlist_len != 1)
+ && (cmd->chanlist_len != 16)) {
+ printk("comedi%d: usbduxfast: ai_cmd: TRIG_EXT only with 1 or 16 channels possible.\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EINVAL;
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast: steps=%ld, convert_arg=%u, ai_timer=%u\n",
+ dev->minor,
+ steps, cmd->convert_arg, this_usbduxfastsub->ai_timer);
+#endif
+
+ switch (cmd->chanlist_len) {
+ // one channel
+ case 1:
+ if (CR_RANGE(cmd->chanlist[0]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+
+ // for external trigger: looping in this state until the RDY0 pin
+ // becomes zero
+ if (cmd->start_src == TRIG_EXT) { // we loop here until ready has been set
+ this_usbduxfastsub->dux_commands[LENBASE + 0] = 0x01; // branch back to state 0
+ this_usbduxfastsub->dux_commands[OPBASE + 0] = 0x01; // deceision state w/o data
+ this_usbduxfastsub->dux_commands[OUTBASE + 0] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0x00; // RDY0 = 0
+ } else { // we just proceed to state 1
+ this_usbduxfastsub->dux_commands[LENBASE + 0] = 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 0] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 0] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0;
+ }
+
+ if (steps < MIN_SAMPLING_PERIOD) {
+ // for fast single channel aqu without mux
+ if (steps <= 1) {
+ // we just stay here at state 1 and rexecute the same state
+ // this gives us 30MHz sampling rate
+ this_usbduxfastsub->dux_commands[LENBASE + 1] = 0x89; // branch back to state 1
+ this_usbduxfastsub->dux_commands[OPBASE + 1] = 0x03; // deceision state with data
+ this_usbduxfastsub->dux_commands[OUTBASE + 1] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0xFF; // doesn't matter
+ } else {
+ // we loop through two states: data and delay: max rate is 15Mhz
+ this_usbduxfastsub->dux_commands[LENBASE + 1] =
+ steps - 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 1] = 0x02; // data
+ this_usbduxfastsub->dux_commands[OUTBASE + 1] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0; // doesn't matter
+
+ this_usbduxfastsub->dux_commands[LENBASE + 2] = 0x09; // branch back to state 1
+ this_usbduxfastsub->dux_commands[OPBASE + 2] = 0x01; // deceision state w/o data
+ this_usbduxfastsub->dux_commands[OUTBASE + 2] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0xFF; // doesn't matter
+ }
+ } else {
+ // we loop through 3 states: 2x delay and 1x data. This gives a min
+ // sampling rate of 60kHz.
+
+ // we have 1 state with duration 1
+ steps = steps - 1;
+
+ // do the first part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + 1] =
+ steps / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 1] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 1] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0;
+
+ // and the second part
+ this_usbduxfastsub->dux_commands[LENBASE + 2] =
+ steps - steps / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 2] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 2] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0;
+
+ // get the data and branch back
+ this_usbduxfastsub->dux_commands[LENBASE + 3] = 0x09; // branch back to state 1
+ this_usbduxfastsub->dux_commands[OPBASE + 3] = 0x03; // deceision state w data
+ this_usbduxfastsub->dux_commands[OUTBASE + 3] =
+ 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 3] = 0xFF; // doesn't matter
+ }
+ break;
+
+ case 2:
+ // two channels
+ // commit data to the FIFO
+ if (CR_RANGE(cmd->chanlist[0]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ this_usbduxfastsub->dux_commands[LENBASE + 0] = 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 0] = 0x02; // data
+ this_usbduxfastsub->dux_commands[OUTBASE + 0] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0;
+
+ // we have 1 state with duration 1: state 0
+ steps_tmp = steps - 1;
+
+ if (CR_RANGE(cmd->chanlist[1]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ // do the first part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + 1] = steps_tmp / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 1] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 1] = 0xFE & rngmask; //count
+ this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0;
+
+ // and the second part
+ this_usbduxfastsub->dux_commands[LENBASE + 2] =
+ steps_tmp - steps_tmp / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 2] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 2] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0;
+
+ this_usbduxfastsub->dux_commands[LENBASE + 3] = 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 3] = 0x02; // data
+ this_usbduxfastsub->dux_commands[OUTBASE + 3] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 3] = 0;
+
+ // we have 2 states with duration 1: step 6 and the IDLE state
+ steps_tmp = steps - 2;
+
+ if (CR_RANGE(cmd->chanlist[0]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ // do the first part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + 4] = steps_tmp / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 4] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 4] = (0xFF - 0x02) & rngmask; //reset
+ this_usbduxfastsub->dux_commands[LOGBASE + 4] = 0;
+
+ // and the second part
+ this_usbduxfastsub->dux_commands[LENBASE + 5] =
+ steps_tmp - steps_tmp / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 5] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 5] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 5] = 0;
+
+ this_usbduxfastsub->dux_commands[LENBASE + 6] = 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 6] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 6] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 6] = 0;
+ break;
+
+ case 3:
+ // three channels
+ for (j = 0; j < 1; j++) {
+ if (CR_RANGE(cmd->chanlist[j]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ // commit data to the FIFO and do the first part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + j * 2] =
+ steps / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + j * 2] = 0x02; // data
+ this_usbduxfastsub->dux_commands[OUTBASE + j * 2] = 0xFF & rngmask; // no change
+ this_usbduxfastsub->dux_commands[LOGBASE + j * 2] = 0;
+
+ if (CR_RANGE(cmd->chanlist[j + 1]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ // do the second part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + j * 2 + 1] =
+ steps - steps / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + j * 2 + 1] = 0; // no data
+ this_usbduxfastsub->dux_commands[OUTBASE + j * 2 + 1] = 0xFE & rngmask; //count
+ this_usbduxfastsub->dux_commands[LOGBASE + j * 2 + 1] =
+ 0;
+ }
+
+ // 2 steps with duration 1: the idele step and step 6:
+ steps_tmp = steps - 2;
+ // commit data to the FIFO and do the first part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + 4] = steps_tmp / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 4] = 0x02; // data
+ this_usbduxfastsub->dux_commands[OUTBASE + 4] = 0xFF & rngmask; // no change
+ this_usbduxfastsub->dux_commands[LOGBASE + 4] = 0;
+
+ if (CR_RANGE(cmd->chanlist[0]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ // do the second part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + 5] =
+ steps_tmp - steps_tmp / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 5] = 0; // no data
+ this_usbduxfastsub->dux_commands[OUTBASE + 5] = (0xFF - 0x02) & rngmask; // reset
+ this_usbduxfastsub->dux_commands[LOGBASE + 5] = 0;
+
+ this_usbduxfastsub->dux_commands[LENBASE + 6] = 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 6] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 6] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 6] = 0;
+
+ case 16:
+ if (CR_RANGE(cmd->chanlist[0]) > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ if (cmd->start_src == TRIG_EXT) { // we loop here until ready has been set
+ this_usbduxfastsub->dux_commands[LENBASE + 0] = 0x01; // branch back to state 0
+ this_usbduxfastsub->dux_commands[OPBASE + 0] = 0x01; // deceision state w/o data
+ this_usbduxfastsub->dux_commands[OUTBASE + 0] = (0xFF - 0x02) & rngmask; // reset
+ this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0x00; // RDY0 = 0
+ } else { // we just proceed to state 1
+ this_usbduxfastsub->dux_commands[LENBASE + 0] = 255; // 30us reset pulse
+ this_usbduxfastsub->dux_commands[OPBASE + 0] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 0] = (0xFF - 0x02) & rngmask; // reset
+ this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0;
+ }
+
+ // commit data to the FIFO
+ this_usbduxfastsub->dux_commands[LENBASE + 1] = 1;
+ this_usbduxfastsub->dux_commands[OPBASE + 1] = 0x02; // data
+ this_usbduxfastsub->dux_commands[OUTBASE + 1] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0;
+
+ // we have 2 states with duration 1
+ steps = steps - 2;
+
+ // do the first part of the delay
+ this_usbduxfastsub->dux_commands[LENBASE + 2] = steps / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 2] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 2] = 0xFE & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0;
+
+ // and the second part
+ this_usbduxfastsub->dux_commands[LENBASE + 3] =
+ steps - steps / 2;
+ this_usbduxfastsub->dux_commands[OPBASE + 3] = 0;
+ this_usbduxfastsub->dux_commands[OUTBASE + 3] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 3] = 0;
+
+ this_usbduxfastsub->dux_commands[LENBASE + 4] = 0x09; // branch back to state 1
+ this_usbduxfastsub->dux_commands[OPBASE + 4] = 0x01; // deceision state w/o data
+ this_usbduxfastsub->dux_commands[OUTBASE + 4] = 0xFF & rngmask;
+ this_usbduxfastsub->dux_commands[LOGBASE + 4] = 0xFF; // doesn't matter
+
+ break;
+
+ default:
+ printk("comedi %d: unsupported combination of channels\n",
+ dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EFAULT;
+ }
+
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi %d: sending commands to the usb device\n", dev->minor);
+#endif
+ // 0 means that the AD commands are sent
+ result = send_dux_commands(this_usbduxfastsub, SENDADCOMMANDS);
+ if (result < 0) {
+ printk("comedi%d: adc command could not be submitted. Aborting...\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return result;
+ }
+ if (cmd->stop_src == TRIG_COUNT) {
+ this_usbduxfastsub->ai_sample_count =
+ (cmd->stop_arg) * (cmd->scan_end_arg);
+ if (usbduxfastsub->ai_sample_count < 1) {
+ printk("comedi%d: (cmd->stop_arg)*(cmd->scan_end_arg)<1, aborting.\n", dev->minor);
+ up(&this_usbduxfastsub->sem);
+ return -EFAULT;
+ }
+ this_usbduxfastsub->ai_continous = 0;
+ } else {
+ // continous aquisition
+ this_usbduxfastsub->ai_continous = 1;
+ this_usbduxfastsub->ai_sample_count = 0;
+ }
+
+ if ((cmd->start_src == TRIG_NOW) || (cmd->start_src == TRIG_EXT)) {
+ // enable this acquisition operation
+ this_usbduxfastsub->ai_cmd_running = 1;
+ ret = usbduxfastsub_submit_InURBs(this_usbduxfastsub);
+ if (ret < 0) {
+ this_usbduxfastsub->ai_cmd_running = 0;
+ // fixme: unlink here??
+ up(&this_usbduxfastsub->sem);
+ return ret;
+ }
+ s->async->inttrig = NULL;
+ } else {
+ /* TRIG_INT */
+ // don't enable the acquision operation
+ // wait for an internal signal
+ s->async->inttrig = usbduxfast_ai_inttrig;
+ }
+ up(&this_usbduxfastsub->sem);
+
+ return 0;
+}
+
+/* Mode 0 is used to get a single conversion on demand */
+static int usbduxfast_ai_insn_read(comedi_device * dev,
+ comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+ int i, j, n, actual_length;
+ int chan, range, rngmask;
+ int err;
+ usbduxfastsub_t *usbduxfastsub = dev->private;
+
+ if (!usbduxfastsub) {
+ printk("comedi%d: ai_insn_read: no usb dev.\n", dev->minor);
+ return -ENODEV;
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: ai_insn_read, insn->n=%d, insn->subdev=%d\n",
+ dev->minor, insn->n, insn->subdev);
+#endif
+ down(&usbduxfastsub->sem);
+ if (!(usbduxfastsub->probed)) {
+ up(&usbduxfastsub->sem);
+ return -ENODEV;
+ }
+ if (usbduxfastsub->ai_cmd_running) {
+ printk("comedi%d: ai_insn_read not possible. Async Command is running.\n", dev->minor);
+ up(&usbduxfastsub->sem);
+ return -EBUSY;
+ }
+ // sample one channel
+ chan = CR_CHAN(insn->chanspec);
+ range = CR_RANGE(insn->chanspec);
+ // set command for the first channel
+
+ if (range > 0)
+ rngmask = 0xff - 0x04;
+ else
+ rngmask = 0xff;
+ // commit data to the FIFO
+ usbduxfastsub->dux_commands[LENBASE + 0] = 1;
+ usbduxfastsub->dux_commands[OPBASE + 0] = 0x02; // data
+ usbduxfastsub->dux_commands[OUTBASE + 0] = 0xFF & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 0] = 0;
+
+ // do the first part of the delay
+ usbduxfastsub->dux_commands[LENBASE + 1] = 12;
+ usbduxfastsub->dux_commands[OPBASE + 1] = 0;
+ usbduxfastsub->dux_commands[OUTBASE + 1] = 0xFE & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 1] = 0;
+
+ usbduxfastsub->dux_commands[LENBASE + 2] = 1;
+ usbduxfastsub->dux_commands[OPBASE + 2] = 0;
+ usbduxfastsub->dux_commands[OUTBASE + 2] = 0xFE & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 2] = 0;
+
+ usbduxfastsub->dux_commands[LENBASE + 3] = 1;
+ usbduxfastsub->dux_commands[OPBASE + 3] = 0;
+ usbduxfastsub->dux_commands[OUTBASE + 3] = 0xFE & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 3] = 0;
+
+ usbduxfastsub->dux_commands[LENBASE + 4] = 1;
+ usbduxfastsub->dux_commands[OPBASE + 4] = 0;
+ usbduxfastsub->dux_commands[OUTBASE + 4] = 0xFE & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 4] = 0;
+
+ // second part
+ usbduxfastsub->dux_commands[LENBASE + 5] = 12;
+ usbduxfastsub->dux_commands[OPBASE + 5] = 0;
+ usbduxfastsub->dux_commands[OUTBASE + 5] = 0xFF & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 5] = 0;
+
+ usbduxfastsub->dux_commands[LENBASE + 6] = 1;
+ usbduxfastsub->dux_commands[OPBASE + 6] = 0;
+ usbduxfastsub->dux_commands[OUTBASE + 6] = 0xFF & rngmask;
+ usbduxfastsub->dux_commands[LOGBASE + 0] = 0;
+
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi %d: sending commands to the usb device\n", dev->minor);
+#endif
+ // 0 means that the AD commands are sent
+ err = send_dux_commands(usbduxfastsub, SENDADCOMMANDS);
+ if (err < 0) {
+ printk("comedi%d: adc command could not be submitted. Aborting...\n", dev->minor);
+ up(&usbduxfastsub->sem);
+ return err;
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast: submitting in-urb: %x,%x\n",
+ usbduxfastsub->comedidev->minor,
+ (int)(usbduxfastsub->urbIn->context),
+ (int)(usbduxfastsub->urbIn->dev));
+#endif
+ for (i = 0; i < PACKETS_TO_IGNORE; i++) {
+ err = USB_BULK_MSG(usbduxfastsub->usbdev,
+ usb_rcvbulkpipe(usbduxfastsub->usbdev, BULKINEP),
+ usbduxfastsub->transfer_buffer,
+ SIZEINBUF, &actual_length, 10000);
+ if (err < 0) {
+ printk("comedi%d: insn timeout. No data.\n",
+ dev->minor);
+ up(&usbduxfastsub->sem);
+ return err;
+ }
+ }
+ // data points
+ for (i = 0; i < insn->n;) {
+ err = USB_BULK_MSG(usbduxfastsub->usbdev,
+ usb_rcvbulkpipe(usbduxfastsub->usbdev, BULKINEP),
+ usbduxfastsub->transfer_buffer,
+ SIZEINBUF, &actual_length, 10000);
+ if (err < 0) {
+ printk("comedi%d: insn data error: %d\n",
+ dev->minor, err);
+ up(&usbduxfastsub->sem);
+ return err;
+ }
+ n = actual_length / sizeof(uint16_t);
+ if ((n % 16) != 0) {
+ printk("comedi%d: insn data packet corrupted.\n",
+ dev->minor);
+ up(&usbduxfastsub->sem);
+ return -EINVAL;
+ }
+ for (j = chan; (j < n) && (i < insn->n); j = j + 16) {
+ data[i] =
+ ((uint16_t *) (usbduxfastsub->
+ transfer_buffer))[j];
+ i++;
+ }
+ }
+ up(&usbduxfastsub->sem);
+ return i;
+}
+
+static unsigned hex2unsigned(char *h)
+{
+ unsigned hi, lo;
+ if (h[0] > '9') {
+ hi = h[0] - 'A' + 0x0a;
+ } else {
+ hi = h[0] - '0';
+ }
+ if (h[1] > '9') {
+ lo = h[1] - 'A' + 0x0a;
+ } else {
+ lo = h[1] - '0';
+ }
+ return hi * 0x10 + lo;
+}
+
+// for FX2
+#define FIRMWARE_MAX_LEN 0x2000
+
+// taken from David Brownell's fxload and adjusted for this driver
+static int read_firmware(usbduxfastsub_t * usbduxfastsub, void *firmwarePtr,
+ long size)
+{
+ int i = 0;
+ unsigned char *fp = (char *)firmwarePtr;
+ unsigned char *firmwareBinary = NULL;
+ int res = 0;
+ int maxAddr = 0;
+
+ firmwareBinary = kmalloc(FIRMWARE_MAX_LEN, GFP_KERNEL);
+ if (!firmwareBinary) {
+ printk("comedi_: usbduxfast: mem alloc for firmware failed\n");
+ return -ENOMEM;
+ }
+
+ for (;;) {
+ char buf[256], *cp;
+ char type;
+ int len;
+ int idx, off;
+ int j = 0;
+
+ // get one line
+ while ((i < size) && (fp[i] != 13) && (fp[i] != 10)) {
+ buf[j] = fp[i];
+ i++;
+ j++;
+ if (j >= sizeof(buf)) {
+ printk("comedi_: usbduxfast: bogus firmware file!\n");
+ return -1;
+ }
+ }
+ // get rid of LF/CR/...
+ while ((i < size) && ((fp[i] == 13) || (fp[i] == 10)
+ || (fp[i] == 0))) {
+ i++;
+ }
+
+ buf[j] = 0;
+ //printk("comedi_: buf=%s\n",buf);
+
+ /* EXTENSION: "# comment-till-end-of-line", for copyrights etc */
+ if (buf[0] == '#')
+ continue;
+
+ if (buf[0] != ':') {
+ printk("comedi_: usbduxfast: upload: not an ihex record: %s", buf);
+ return -EFAULT;
+ }
+
+ /* Read the length field (up to 16 bytes) */
+ len = hex2unsigned(buf + 1);
+
+ /* Read the target offset */
+ off = (hex2unsigned(buf + 3) * 0x0100) + hex2unsigned(buf + 5);
+
+ if ((off + len) > maxAddr) {
+ maxAddr = off + len;
+ }
+
+ if (maxAddr >= FIRMWARE_MAX_LEN) {
+ printk("comedi_: usbduxfast: firmware upload goes beyond FX2 RAM boundaries.");
+ return -EFAULT;
+ }
+ //printk("comedi_: usbduxfast: off=%x, len=%x:",off,len);
+
+ /* Read the record type */
+ type = hex2unsigned(buf + 7);
+
+ /* If this is an EOF record, then make it so. */
+ if (type == 1) {
+ break;
+ }
+
+ if (type != 0) {
+ printk("comedi_: usbduxfast: unsupported record type: %u\n", type);
+ return -EFAULT;
+ }
+
+ for (idx = 0, cp = buf + 9; idx < len; idx += 1, cp += 2) {
+ firmwareBinary[idx + off] = hex2unsigned(cp);
+ //printk("%02x ",firmwareBinary[idx+off]);
+ }
+ //printk("\n");
+
+ if (i >= size) {
+ printk("comedi_: usbduxfast: unexpected end of hex file\n");
+ break;
+ }
+
+ }
+ res = firmwareUpload(usbduxfastsub, firmwareBinary, maxAddr + 1);
+ kfree(firmwareBinary);
+ return res;
+}
+
+static void tidy_up(usbduxfastsub_t * usbduxfastsub_tmp)
+{
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast: tiding up\n");
+#endif
+ if (!usbduxfastsub_tmp) {
+ return;
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+ // shows the usb subsystem that the driver is down
+ if (usbduxfastsub_tmp->interface) {
+ usb_set_intfdata(usbduxfastsub_tmp->interface, NULL);
+ }
+#endif
+
+ usbduxfastsub_tmp->probed = 0;
+
+ if (usbduxfastsub_tmp->urbIn) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,8)
+ // waits until a running transfer is over
+ // thus, under 2.4 hotplugging while a command
+ // is running is not safe
+ usb_kill_urb(usbduxfastsub_tmp->urbIn);
+#endif
+ if (usbduxfastsub_tmp->transfer_buffer) {
+ kfree(usbduxfastsub_tmp->transfer_buffer);
+ usbduxfastsub_tmp->transfer_buffer = NULL;
+ }
+ usb_free_urb(usbduxfastsub_tmp->urbIn);
+ usbduxfastsub_tmp->urbIn = NULL;
+ }
+ if (usbduxfastsub_tmp->insnBuffer) {
+ kfree(usbduxfastsub_tmp->insnBuffer);
+ usbduxfastsub_tmp->insnBuffer = NULL;
+ }
+ if (usbduxfastsub_tmp->dux_commands) {
+ kfree(usbduxfastsub_tmp->dux_commands);
+ usbduxfastsub_tmp->dux_commands = NULL;
+ }
+ usbduxfastsub_tmp->ai_cmd_running = 0;
+}
+
+// allocate memory for the urbs and initialise them
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+static void *usbduxfastsub_probe(struct usb_device *udev,
+ unsigned int interfnum, const struct usb_device_id *id)
+{
+#else
+static int usbduxfastsub_probe(struct usb_interface *uinterf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(uinterf);
+#endif
+ int i;
+ int index;
+
+ if (udev->speed != USB_SPEED_HIGH) {
+ printk("comedi_: usbduxfast_: This driver needs USB 2.0 to operate. Aborting...\n");
+ return PROBE_ERR_RETURN(-ENODEV);
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast_: finding a free structure for the usb-device\n");
+#endif
+ down(&start_stop_sem);
+ // look for a free place in the usbduxfast array
+ index = -1;
+ for (i = 0; i < NUMUSBDUXFAST; i++) {
+ if (!(usbduxfastsub[i].probed)) {
+ index = i;
+ break;
+ }
+ }
+
+ // no more space
+ if (index == -1) {
+ printk("Too many usbduxfast-devices connected.\n");
+ up(&start_stop_sem);
+ return PROBE_ERR_RETURN(-EMFILE);
+ }
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast: usbduxfastsub[%d] is ready to connect to comedi.\n", index);
+#endif
+
+ init_MUTEX(&(usbduxfastsub[index].sem));
+ // save a pointer to the usb device
+ usbduxfastsub[index].usbdev = udev;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+ // save the interface number
+ usbduxfastsub[index].ifnum = interfnum;
+#else
+ // 2.6: save the interface itself
+ usbduxfastsub[index].interface = uinterf;
+ // get the interface number from the interface
+ usbduxfastsub[index].ifnum = uinterf->altsetting->desc.bInterfaceNumber;
+ // hand the private data over to the usb subsystem
+ // will be needed for disconnect
+ usb_set_intfdata(uinterf, &(usbduxfastsub[index]));
+#endif
+
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast: ifnum=%d\n", usbduxfastsub[index].ifnum);
+#endif
+ // create space for the commands going to the usb device
+ usbduxfastsub[index].dux_commands = kmalloc(SIZEOFDUXBUFFER,
+ GFP_KERNEL);
+ if (!usbduxfastsub[index].dux_commands) {
+ printk("comedi_: usbduxfast: error alloc space for dac commands\n");
+ tidy_up(&(usbduxfastsub[index]));
+ up(&start_stop_sem);
+ return PROBE_ERR_RETURN(-ENOMEM);
+ }
+ // create space of the instruction buffer
+ usbduxfastsub[index].insnBuffer = kmalloc(SIZEINSNBUF, GFP_KERNEL);
+ if (!(usbduxfastsub[index].insnBuffer)) {
+ printk("comedi_: usbduxfast: could not alloc space for insnBuffer\n");
+ tidy_up(&(usbduxfastsub[index]));
+ up(&start_stop_sem);
+ return PROBE_ERR_RETURN(-ENOMEM);
+ }
+ // setting to alternate setting 1: enabling bulk ep
+ i = usb_set_interface(usbduxfastsub[index].usbdev,
+ usbduxfastsub[index].ifnum, 1);
+ if (i < 0) {
+ printk("comedi_: usbduxfast%d: could not switch to alternate setting 1.\n", index);
+ tidy_up(&(usbduxfastsub[index]));
+ up(&start_stop_sem);
+ return PROBE_ERR_RETURN(-ENODEV);
+ }
+ usbduxfastsub[index].urbIn = USB_ALLOC_URB(0);
+ if (usbduxfastsub[index].urbIn == NULL) {
+ printk("comedi_: usbduxfast%d: Could not alloc. urb\n", index);
+ tidy_up(&(usbduxfastsub[index]));
+ up(&start_stop_sem);
+ return PROBE_ERR_RETURN(-ENOMEM);
+ }
+ usbduxfastsub[index].transfer_buffer = kmalloc(SIZEINBUF, GFP_KERNEL);
+ if (!(usbduxfastsub[index].transfer_buffer)) {
+ printk("comedi_: usbduxfast%d: could not alloc. transb.\n",
+ index);
+ tidy_up(&(usbduxfastsub[index]));
+ up(&start_stop_sem);
+ return PROBE_ERR_RETURN(-ENOMEM);
+ }
+ // we've reached the bottom of the function
+ usbduxfastsub[index].probed = 1;
+ up(&start_stop_sem);
+ printk("comedi_: usbduxfast%d has been successfully initialized.\n",
+ index);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+ return (void *)(&usbduxfastsub[index]);
+#else
+ // success
+ return 0;
+#endif
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+static void usbduxfastsub_disconnect(struct usb_device *udev, void *ptr)
+{
+ usbduxfastsub_t *usbduxfastsub_tmp = (usbduxfastsub_t *) ptr;
+#else
+static void usbduxfastsub_disconnect(struct usb_interface *intf)
+{
+ usbduxfastsub_t *usbduxfastsub_tmp = usb_get_intfdata(intf);
+ struct usb_device *udev = interface_to_usbdev(intf);
+#endif
+ if (!usbduxfastsub_tmp) {
+ printk("comedi_: usbduxfast: disconnect called with null pointer.\n");
+ return;
+ }
+ if (usbduxfastsub_tmp->usbdev != udev) {
+ printk("comedi_: usbduxfast: BUG! called with wrong ptr!!!\n");
+ return;
+ }
+ down(&start_stop_sem);
+ down(&usbduxfastsub_tmp->sem);
+ tidy_up(usbduxfastsub_tmp);
+ up(&usbduxfastsub_tmp->sem);
+ up(&start_stop_sem);
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast: disconnected from the usb\n");
+#endif
+}
+
+// is called when comedi-config is called
+static int usbduxfast_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ int ret;
+ int index;
+ int i;
+ comedi_subdevice *s = NULL;
+ dev->private = NULL;
+
+ down(&start_stop_sem);
+ // find a valid device which has been detected by the probe function of the usb
+ index = -1;
+ for (i = 0; i < NUMUSBDUXFAST; i++) {
+ if ((usbduxfastsub[i].probed) && (!usbduxfastsub[i].attached)) {
+ index = i;
+ break;
+ }
+ }
+
+ if (index < 0) {
+ printk("comedi%d: usbduxfast: error: attach failed, no usbduxfast devs connected to the usb bus.\n", dev->minor);
+ up(&start_stop_sem);
+ return -ENODEV;
+ }
+
+ down(&(usbduxfastsub[index].sem));
+ // pointer back to the corresponding comedi device
+ usbduxfastsub[index].comedidev = dev;
+
+ // trying to upload the firmware into the chip
+ if (comedi_aux_data(it->options, 0) &&
+ it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) {
+ read_firmware(usbduxfastsub,
+ comedi_aux_data(it->options, 0),
+ it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]);
+ }
+
+ dev->board_name = BOARDNAME;
+
+ /* set number of subdevices */
+ dev->n_subdevices = N_SUBDEVICES;
+
+ // allocate space for the subdevices
+ if ((ret = alloc_subdevices(dev, N_SUBDEVICES)) < 0) {
+ printk("comedi%d: usbduxfast: error alloc space for subdev\n",
+ dev->minor);
+ up(&start_stop_sem);
+ return ret;
+ }
+
+ printk("comedi%d: usbduxfast: usb-device %d is attached to comedi.\n",
+ dev->minor, index);
+ // private structure is also simply the usb-structure
+ dev->private = usbduxfastsub + index;
+ // the first subdevice is the A/D converter
+ s = dev->subdevices + SUBDEV_AD;
+ // the URBs get the comedi subdevice
+ // which is responsible for reading
+ // this is the subdevice which reads data
+ dev->read_subdev = s;
+ // the subdevice receives as private structure the
+ // usb-structure
+ s->private = NULL;
+ // analog input
+ s->type = COMEDI_SUBD_AI;
+ // readable and ref is to ground
+ s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
+ // 16 channels
+ s->n_chan = 16;
+ // length of the channellist
+ s->len_chanlist = 16;
+ // callback functions
+ s->insn_read = usbduxfast_ai_insn_read;
+ s->do_cmdtest = usbduxfast_ai_cmdtest;
+ s->do_cmd = usbduxfast_ai_cmd;
+ s->cancel = usbduxfast_ai_cancel;
+ // max value from the A/D converter (12bit+1 bit for overflow)
+ s->maxdata = 0x1000;
+ // range table to convert to physical units
+ s->range_table = &range_usbduxfast_ai_range;
+
+ // finally decide that it's attached
+ usbduxfastsub[index].attached = 1;
+
+ up(&(usbduxfastsub[index].sem));
+
+ up(&start_stop_sem);
+
+ printk("comedi%d: successfully attached to usbduxfast.\n", dev->minor);
+
+ return 0;
+}
+
+static int usbduxfast_detach(comedi_device * dev)
+{
+ usbduxfastsub_t *usbduxfastsub_tmp;
+
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast: detach usb device\n", dev->minor);
+#endif
+
+ if (!dev) {
+ printk("comedi?: usbduxfast: detach without dev variable...\n");
+ return -EFAULT;
+ }
+
+ usbduxfastsub_tmp = dev->private;
+ if (!usbduxfastsub_tmp) {
+ printk("comedi?: usbduxfast: detach without ptr to usbduxfastsub[]\n");
+ return -EFAULT;
+ }
+
+ down(&usbduxfastsub_tmp->sem);
+ down(&start_stop_sem);
+ // Don't allow detach to free the private structure
+ // It's one entry of of usbduxfastsub[]
+ dev->private = NULL;
+ usbduxfastsub_tmp->attached = 0;
+ usbduxfastsub_tmp->comedidev = NULL;
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi%d: usbduxfast: detach: successfully removed\n",
+ dev->minor);
+#endif
+ up(&start_stop_sem);
+ up(&usbduxfastsub_tmp->sem);
+ return 0;
+}
+
+/* main driver struct */
+static comedi_driver driver_usbduxfast = {
+ driver_name:"usbduxfast",
+ module:THIS_MODULE,
+ attach:usbduxfast_attach,
+ detach:usbduxfast_detach,
+};
+
+static void init_usb_devices(void)
+{
+ int index;
+#ifdef CONFIG_COMEDI_DEBUG
+ printk("comedi_: usbduxfast: setting all possible devs to invalid\n");
+#endif
+ // all devices entries are invalid to begin with
+ // they will become valid by the probe function
+ // and then finally by the attach-function
+ for (index = 0; index < NUMUSBDUXFAST; index++) {
+ memset(&(usbduxfastsub[index]), 0x00,
+ sizeof(usbduxfastsub[index]));
+ init_MUTEX(&(usbduxfastsub[index].sem));
+ }
+}
+
+// Table with the USB-devices: just now only testing IDs
+static struct usb_device_id usbduxfastsub_table[] = {
+ // { USB_DEVICE(0x4b4, 0x8613), //testing
+ // },
+ {USB_DEVICE(0x13d8, 0x0010) //real ID
+ },
+ {USB_DEVICE(0x13d8, 0x0011) //real ID
+ },
+ {} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, usbduxfastsub_table);
+
+// The usbduxfastsub-driver
+static struct usb_driver usbduxfastsub_driver = {
+#ifdef COMEDI_HAVE_USB_DRIVER_OWNER
+ owner:THIS_MODULE,
+#endif
+ name:BOARDNAME,
+ probe:usbduxfastsub_probe,
+ disconnect:usbduxfastsub_disconnect,
+ id_table:usbduxfastsub_table,
+};
+
+// Can't use the nice macro as I have also to initialise the USB
+// subsystem:
+// registering the usb-system _and_ the comedi-driver
+static int init_usbduxfast(void)
+{
+ printk(KERN_INFO KBUILD_MODNAME ": "
+ DRIVER_VERSION ":" DRIVER_DESC "\n");
+ init_usb_devices();
+ usb_register(&usbduxfastsub_driver);
+ comedi_driver_register(&driver_usbduxfast);
+ return 0;
+}
+
+// deregistering the comedi driver and the usb-subsystem
+static void exit_usbduxfast(void)
+{
+ comedi_driver_unregister(&driver_usbduxfast);
+ usb_deregister(&usbduxfastsub_driver);
+}
+
+module_init(init_usbduxfast);
+module_exit(exit_usbduxfast);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");