// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2004-2019 Bernd Porr, [email protected] */ /* * Driver: usbduxfast * Description: University of Stirling USB DAQ & INCITE Technology Limited * Devices: [ITL] USB-DUX-FAST (usbduxfast) * Author: Bernd Porr <[email protected]> * Updated: 16 Nov 2019 * Status: stable */ /* * I must give credit here to Chris Baugher who * wrote the driver for AT-MIO-16d. I used some parts of this * driver. I also must give credits to David Brownell * who supported me with the USB development. * * Bernd Porr * * * Revision history: * 1.0: Fixed a rounding error in usbduxfast_ai_cmdtest * 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. * 1.00: added firmware kernel request to the driver which fixed * udev coldplug problem */ #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 <linux/comedi/comedi_usb.h> /* * timeout for the USB-transfer */ #define EZTIMEOUT … /* * constants for "firmware" upload and download */ #define FIRMWARE … #define FIRMWARE_MAX_LEN … #define USBDUXFASTSUB_FIRMWARE … #define VENDOR_DIR_IN … #define VENDOR_DIR_OUT … /* * internal addresses of the 8051 processor */ #define USBDUXFASTSUB_CPUCS … /* * max length of the transfer-buffer for software upload */ #define TB_LEN … /* * input endpoint number */ #define BULKINEP … /* * endpoint for the A/D channellist: bulk OUT */ #define CHANNELLISTEP … /* * number of channels */ #define NUMCHANNELS … /* * size of the waveform descriptor */ #define WAVESIZE … /* * size of one A/D value */ #define SIZEADIN … /* * size of the input-buffer IN BYTES */ #define SIZEINBUF … /* * 16 bytes */ #define SIZEINSNBUF … /* * size of the buffer for the dux commands in bytes */ #define SIZEOFDUXBUF … /* * number of in-URBs which receive the data: min=5 */ #define NUMOFINBUFFERSHIGH … /* * min delay steps for more than one channel * basically when the mux gives up ;-) * * steps at 30MHz in the FX2 */ #define MIN_SAMPLING_PERIOD … /* * max number of 1/30MHz delay steps */ #define MAX_SAMPLING_PERIOD … /* * 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 … /* * comedi constants */ static const struct comedi_lrange range_usbduxfast_ai_range = …; /* * private structure of one subdevice * * this is the structure which holds all the data of this driver * one sub device just now: A/D */ struct usbduxfast_private { … }; /* * bulk transfers to usbduxfast */ #define SENDADCOMMANDS … #define SENDINITEP6 … static int usbduxfast_send_cmd(struct comedi_device *dev, int cmd_type) { … } static void usbduxfast_cmd_data(struct comedi_device *dev, int index, u8 len, u8 op, u8 out, u8 log) { … } static int usbduxfast_ai_stop(struct comedi_device *dev, int do_unlink) { … } static int usbduxfast_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { … } static void usbduxfast_ai_handle_urb(struct comedi_device *dev, struct comedi_subdevice *s, struct urb *urb) { … } static void usbduxfast_ai_interrupt(struct urb *urb) { … } static int usbduxfast_submit_urb(struct comedi_device *dev) { … } static int usbduxfast_ai_check_chanlist(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } static int usbduxfast_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } static int usbduxfast_ai_inttrig(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int trig_num) { … } static int usbduxfast_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { … } /* * Mode 0 is used to get a single conversion on demand. */ static int usbduxfast_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbduxfast_upload_firmware(struct comedi_device *dev, const u8 *data, size_t size, unsigned long context) { … } static int usbduxfast_auto_attach(struct comedi_device *dev, unsigned long context_unused) { … } static void usbduxfast_detach(struct comedi_device *dev) { … } static struct comedi_driver usbduxfast_driver = …; static int usbduxfast_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } static const struct usb_device_id usbduxfast_usb_table[] = …; MODULE_DEVICE_TABLE(usb, usbduxfast_usb_table); static struct usb_driver usbduxfast_usb_driver = …; module_comedi_usb_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_FIRMWARE(…);
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