// SPDX-License-Identifier: GPL-2.0+ /* * usbdux.c * Copyright (C) 2003-2014 Bernd Porr, [email protected] */ /* * Driver: usbdux * Description: University of Stirling USB DAQ & INCITE Technology Limited * Devices: [ITL] USB-DUX (usbdux) * Author: Bernd Porr <[email protected]> * 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 <linux/comedi/comedi_usb.h> /* constants for firmware upload and download */ #define USBDUX_FIRMWARE … #define USBDUX_FIRMWARE_MAX_LEN … #define USBDUX_FIRMWARE_CMD … #define VENDOR_DIR_IN … #define VENDOR_DIR_OUT … #define USBDUX_CPU_CS … /* usbdux bulk transfer commands */ #define USBDUX_CMD_MULT_AI … #define USBDUX_CMD_AO … #define USBDUX_CMD_DIO_CFG … #define USBDUX_CMD_DIO_BITS … #define USBDUX_CMD_SINGLE_AI … #define USBDUX_CMD_TIMER_RD … #define USBDUX_CMD_TIMER_WR … #define USBDUX_CMD_PWM_ON … #define USBDUX_CMD_PWM_OFF … /* timeout for the USB-transfer in ms */ #define BULK_TIMEOUT … /* 300Hz max frequ under PWM */ #define MIN_PWM_PERIOD … /* Default PWM frequency */ #define PWM_DEFAULT_PERIOD … /* Size of one A/D value */ #define SIZEADIN … /* * Size of the input-buffer IN BYTES * Always multiple of 8 for 8 microframes which is needed in the highspeed mode */ #define SIZEINBUF … /* 16 bytes. */ #define SIZEINSNBUF … /* size of one value for the D/A converter: channel and value */ #define SIZEDAOUT … /* * 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 … /* * Size of the buffer for the dux commands: just now max size is determined * by the analogue out + command byte + panic bytes... */ #define SIZEOFDUXBUFFER … /* Number of in-URBs which receive the data: min=2 */ #define NUMOFINBUFFERSFULL … /* Number of out-URBs which send the data: min=2 */ #define NUMOFOUTBUFFERSFULL … /* Number of in-URBs which receive the data: min=5 */ /* must have more buffers due to buggy USB ctr */ #define NUMOFINBUFFERSHIGH … /* Number of out-URBs which send the data: min=5 */ /* must have more buffers due to buggy USB ctr */ #define NUMOFOUTBUFFERSHIGH … /* number of retries to get the right dux command */ #define RETRIES … static const struct comedi_lrange range_usbdux_ai_range = …; static const struct comedi_lrange range_usbdux_ao_range = …; struct usbdux_private { … }; static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs) { … } static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink) { … } static int usbdux_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { … } static void usbduxsub_ai_handle_urb(struct comedi_device *dev, struct comedi_subdevice *s, struct urb *urb) { … } static void usbduxsub_ai_isoc_irq(struct urb *urb) { … } static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink) { … } static int usbdux_ao_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { … } static void usbduxsub_ao_handle_urb(struct comedi_device *dev, struct comedi_subdevice *s, struct urb *urb) { … } static void usbduxsub_ao_isoc_irq(struct urb *urb) { … } static int usbdux_submit_urbs(struct comedi_device *dev, struct urb **urbs, int num_urbs, int input_urb) { … } static int usbdux_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } /* * creates the ADC command for the MAX1271 * range is the range value from comedi */ static u8 create_adc_command(unsigned int chan, unsigned int range) { … } static int send_dux_commands(struct comedi_device *dev, unsigned int cmd_type) { … } static int receive_dux_commands(struct comedi_device *dev, unsigned int command) { … } static int usbdux_ai_inttrig(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int trig_num) { … } static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { … } /* 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) { … } static int usbdux_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_ao_inttrig(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int trig_num) { … } static int usbdux_ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int usbdux_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_counter_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_counter_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_counter_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static void usbduxsub_unlink_pwm_urbs(struct comedi_device *dev) { … } static void usbdux_pwm_stop(struct comedi_device *dev, int do_unlink) { … } static int usbdux_pwm_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { … } static void usbduxsub_pwm_irq(struct urb *urb) { … } static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev) { … } static int usbdux_pwm_period(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int period) { … } static int usbdux_pwm_start(struct comedi_device *dev, struct comedi_subdevice *s) { … } static void usbdux_pwm_pattern(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int chan, unsigned int value, unsigned int sign) { … } static int usbdux_pwm_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_pwm_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int usbdux_firmware_upload(struct comedi_device *dev, const u8 *data, size_t size, unsigned long context) { … } static int usbdux_alloc_usb_buffers(struct comedi_device *dev) { … } static void usbdux_free_usb_buffers(struct comedi_device *dev) { … } static int usbdux_auto_attach(struct comedi_device *dev, unsigned long context_unused) { … } static void usbdux_detach(struct comedi_device *dev) { … } static struct comedi_driver usbdux_driver = …; static int usbdux_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } static const struct usb_device_id usbdux_usb_table[] = …; MODULE_DEVICE_TABLE(usb, usbdux_usb_table); static struct usb_driver usbdux_usb_driver = …; module_comedi_usb_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_FIRMWARE(…);
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