// SPDX-License-Identifier: GPL-2.0+
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/*
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* usbdux.c
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* Copyright (C) 2003-2014 Bernd Porr, mail@berndporr.me.uk
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*/
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/*
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* Driver: usbdux
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* Description: University of Stirling USB DAQ & INCITE Technology Limited
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* Devices: [ITL] USB-DUX (usbdux)
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* Author: Bernd Porr <mail@berndporr.me.uk>
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* Updated: 10 Oct 2014
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* Status: Stable
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*
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* Connection scheme for the counter at the digital port:
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* 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1.
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* The sampling rate of the counter is approximately 500Hz.
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*
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* Note that under USB2.0 the length of the channel list determines
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* the max sampling rate. If you sample only one channel you get 8kHz
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* sampling rate. If you sample two channels you get 4kHz and so on.
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*/
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/*
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* I must give credit here to Chris Baugher who
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* wrote the driver for AT-MIO-16d. I used some parts of this
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* driver. I also must give credits to David Brownell
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* who supported me with the USB development.
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*
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* Bernd Porr
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*
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*
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* Revision history:
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* 0.94: D/A output should work now with any channel list combinations
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* 0.95: .owner commented out for kernel vers below 2.4.19
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* sanity checks in ai/ao_cmd
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* 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's
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* attach final USB IDs
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* moved memory allocation completely to the corresponding comedi
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* functions firmware upload is by fxload and no longer by comedi (due to
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* enumeration)
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* 0.97: USB IDs received, adjusted table
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* 0.98: SMP, locking, memory alloc: moved all usb memory alloc
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* to the usb subsystem and moved all comedi related memory
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* alloc to comedi.
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* | kernel | registration | usbdux-usb | usbdux-comedi | comedi |
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* 0.99: USB 2.0: changed protocol to isochronous transfer
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* IRQ transfer is too buggy and too risky in 2.0
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* for the high speed ISO transfer is now a working version
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* available
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* 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA
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* chipsets miss out IRQs. Deeper buffering is needed.
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* 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling
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* rate.
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* Firmware vers 1.00 is needed for this.
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* Two 16 bit up/down/reset counter with a sampling rate of 1kHz
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* And loads of cleaning up, in particular streamlining the
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* bulk transfers.
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* 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4
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* 1.2: added PWM support via EP4
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* 2.0: PWM seems to be stable and is not interfering with the other functions
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* 2.1: changed PWM API
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* 2.2: added firmware kernel request to fix an udev problem
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* 2.3: corrected a bug in bulk timeouts which were far too short
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* 2.4: fixed a bug which causes the driver to hang when it ran out of data.
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* Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/fcntl.h>
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#include <linux/compiler.h>
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#include "../comedi_usb.h"
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/* constants for firmware upload and download */
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#define USBDUX_FIRMWARE "usbdux_firmware.bin"
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#define USBDUX_FIRMWARE_MAX_LEN 0x2000
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#define USBDUX_FIRMWARE_CMD 0xa0
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#define VENDOR_DIR_IN 0xc0
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#define VENDOR_DIR_OUT 0x40
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#define USBDUX_CPU_CS 0xe600
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/* usbdux bulk transfer commands */
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#define USBDUX_CMD_MULT_AI 0
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#define USBDUX_CMD_AO 1
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#define USBDUX_CMD_DIO_CFG 2
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#define USBDUX_CMD_DIO_BITS 3
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#define USBDUX_CMD_SINGLE_AI 4
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#define USBDUX_CMD_TIMER_RD 5
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#define USBDUX_CMD_TIMER_WR 6
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#define USBDUX_CMD_PWM_ON 7
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#define USBDUX_CMD_PWM_OFF 8
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/* timeout for the USB-transfer in ms */
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#define BULK_TIMEOUT 1000
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/* 300Hz max frequ under PWM */
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#define MIN_PWM_PERIOD ((long)(1E9 / 300))
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/* Default PWM frequency */
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#define PWM_DEFAULT_PERIOD ((long)(1E9 / 100))
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/* Size of one A/D value */
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#define SIZEADIN ((sizeof(u16)))
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/*
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* Size of the input-buffer IN BYTES
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* Always multiple of 8 for 8 microframes which is needed in the highspeed mode
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*/
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#define SIZEINBUF (8 * SIZEADIN)
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/* 16 bytes. */
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#define SIZEINSNBUF 16
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/* size of one value for the D/A converter: channel and value */
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#define SIZEDAOUT ((sizeof(u8) + sizeof(u16)))
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/*
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* Size of the output-buffer in bytes
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* Actually only the first 4 triplets are used but for the
|
* high speed mode we need to pad it to 8 (microframes).
|
*/
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#define SIZEOUTBUF (8 * SIZEDAOUT)
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/*
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* Size of the buffer for the dux commands: just now max size is determined
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* by the analogue out + command byte + panic bytes...
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*/
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#define SIZEOFDUXBUFFER (8 * SIZEDAOUT + 2)
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/* Number of in-URBs which receive the data: min=2 */
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#define NUMOFINBUFFERSFULL 5
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/* Number of out-URBs which send the data: min=2 */
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#define NUMOFOUTBUFFERSFULL 5
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/* Number of in-URBs which receive the data: min=5 */
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/* must have more buffers due to buggy USB ctr */
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#define NUMOFINBUFFERSHIGH 10
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/* Number of out-URBs which send the data: min=5 */
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/* must have more buffers due to buggy USB ctr */
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#define NUMOFOUTBUFFERSHIGH 10
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/* number of retries to get the right dux command */
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#define RETRIES 10
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static const struct comedi_lrange range_usbdux_ai_range = {
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4, {
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BIP_RANGE(4.096),
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BIP_RANGE(4.096 / 2),
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UNI_RANGE(4.096),
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UNI_RANGE(4.096 / 2)
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}
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};
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static const struct comedi_lrange range_usbdux_ao_range = {
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2, {
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BIP_RANGE(4.096),
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UNI_RANGE(4.096)
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}
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};
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struct usbdux_private {
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/* actual number of in-buffers */
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int n_ai_urbs;
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/* actual number of out-buffers */
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int n_ao_urbs;
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/* ISO-transfer handling: buffers */
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struct urb **ai_urbs;
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struct urb **ao_urbs;
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/* pwm-transfer handling */
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struct urb *pwm_urb;
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/* PWM period */
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unsigned int pwm_period;
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/* PWM internal delay for the GPIF in the FX2 */
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u8 pwm_delay;
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/* size of the PWM buffer which holds the bit pattern */
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int pwm_buf_sz;
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/* input buffer for the ISO-transfer */
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__le16 *in_buf;
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/* input buffer for single insn */
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__le16 *insn_buf;
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unsigned int high_speed:1;
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unsigned int ai_cmd_running:1;
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unsigned int ao_cmd_running:1;
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unsigned int pwm_cmd_running:1;
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/* time between samples in units of the timer */
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unsigned int ai_timer;
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unsigned int ao_timer;
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/* counter between aquisitions */
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unsigned int ai_counter;
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unsigned int ao_counter;
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/* interval in frames/uframes */
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unsigned int ai_interval;
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/* commands */
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u8 *dux_commands;
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struct mutex mut;
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};
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static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs)
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{
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int i;
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for (i = 0; i < num_urbs; i++)
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usb_kill_urb(urbs[i]);
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}
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static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink)
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{
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struct usbdux_private *devpriv = dev->private;
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if (do_unlink && devpriv->ai_urbs)
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usbdux_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
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devpriv->ai_cmd_running = 0;
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}
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static int usbdux_ai_cancel(struct comedi_device *dev,
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struct comedi_subdevice *s)
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{
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struct usbdux_private *devpriv = dev->private;
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/* prevent other CPUs from submitting new commands just now */
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mutex_lock(&devpriv->mut);
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/* unlink only if the urb really has been submitted */
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usbdux_ai_stop(dev, devpriv->ai_cmd_running);
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mutex_unlock(&devpriv->mut);
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return 0;
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}
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static void usbduxsub_ai_handle_urb(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct urb *urb)
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{
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struct usbdux_private *devpriv = dev->private;
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struct comedi_async *async = s->async;
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struct comedi_cmd *cmd = &async->cmd;
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int ret;
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int i;
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devpriv->ai_counter--;
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if (devpriv->ai_counter == 0) {
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devpriv->ai_counter = devpriv->ai_timer;
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/* get the data from the USB bus and hand it over to comedi */
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for (i = 0; i < cmd->chanlist_len; i++) {
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unsigned int range = CR_RANGE(cmd->chanlist[i]);
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u16 val = le16_to_cpu(devpriv->in_buf[i]);
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|
/* bipolar data is two's-complement */
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if (comedi_range_is_bipolar(s, range))
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val = comedi_offset_munge(s, val);
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/* transfer data */
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if (!comedi_buf_write_samples(s, &val, 1))
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return;
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}
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if (cmd->stop_src == TRIG_COUNT &&
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async->scans_done >= cmd->stop_arg)
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async->events |= COMEDI_CB_EOA;
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}
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/* if command is still running, resubmit urb */
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if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
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urb->dev = comedi_to_usb_dev(dev);
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ret = usb_submit_urb(urb, GFP_ATOMIC);
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if (ret < 0) {
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dev_err(dev->class_dev,
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"urb resubmit failed in int-context! err=%d\n",
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ret);
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if (ret == -EL2NSYNC)
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dev_err(dev->class_dev,
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"buggy USB host controller or bug in IRQ handler!\n");
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async->events |= COMEDI_CB_ERROR;
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}
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}
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}
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static void usbduxsub_ai_isoc_irq(struct urb *urb)
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{
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struct comedi_device *dev = urb->context;
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struct comedi_subdevice *s = dev->read_subdev;
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struct comedi_async *async = s->async;
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struct usbdux_private *devpriv = dev->private;
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/* exit if not running a command, do not resubmit urb */
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if (!devpriv->ai_cmd_running)
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return;
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switch (urb->status) {
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case 0:
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/* copy the result in the transfer buffer */
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memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
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usbduxsub_ai_handle_urb(dev, s, urb);
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break;
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case -EILSEQ:
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/*
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* error in the ISOchronous data
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* we don't copy the data into the transfer buffer
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* and recycle the last data byte
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*/
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dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
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usbduxsub_ai_handle_urb(dev, s, urb);
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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case -ECONNABORTED:
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/* after an unlink command, unplug, ... etc */
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async->events |= COMEDI_CB_ERROR;
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break;
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default:
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/* a real error */
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dev_err(dev->class_dev,
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"Non-zero urb status received in ai intr context: %d\n",
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urb->status);
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async->events |= COMEDI_CB_ERROR;
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break;
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}
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/*
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* comedi_handle_events() cannot be used in this driver. The (*cancel)
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* operation would unlink the urb.
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*/
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if (async->events & COMEDI_CB_CANCEL_MASK)
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usbdux_ai_stop(dev, 0);
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comedi_event(dev, s);
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}
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static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink)
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{
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struct usbdux_private *devpriv = dev->private;
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if (do_unlink && devpriv->ao_urbs)
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usbdux_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
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devpriv->ao_cmd_running = 0;
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}
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static int usbdux_ao_cancel(struct comedi_device *dev,
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struct comedi_subdevice *s)
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{
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struct usbdux_private *devpriv = dev->private;
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/* prevent other CPUs from submitting a command just now */
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mutex_lock(&devpriv->mut);
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/* unlink only if it is really running */
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usbdux_ao_stop(dev, devpriv->ao_cmd_running);
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mutex_unlock(&devpriv->mut);
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return 0;
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}
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static void usbduxsub_ao_handle_urb(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct urb *urb)
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{
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struct usbdux_private *devpriv = dev->private;
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struct comedi_async *async = s->async;
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struct comedi_cmd *cmd = &async->cmd;
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u8 *datap;
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int ret;
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int i;
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devpriv->ao_counter--;
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if (devpriv->ao_counter == 0) {
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devpriv->ao_counter = devpriv->ao_timer;
|
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if (cmd->stop_src == TRIG_COUNT &&
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async->scans_done >= cmd->stop_arg) {
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async->events |= COMEDI_CB_EOA;
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return;
|
}
|
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/* transmit data to the USB bus */
|
datap = urb->transfer_buffer;
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*datap++ = cmd->chanlist_len;
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for (i = 0; i < cmd->chanlist_len; i++) {
|
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
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unsigned short val;
|
|
if (!comedi_buf_read_samples(s, &val, 1)) {
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dev_err(dev->class_dev, "buffer underflow\n");
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async->events |= COMEDI_CB_OVERFLOW;
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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;
|
}
|
}
|
}
|
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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 *devpriv = dev->private;
|
int err = 0;
|
|
/* Step 1 : check if triggers are trivially valid */
|
|
err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
|
err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
|
err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
|
err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
|
err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
|
|
if (err)
|
return 1;
|
|
/* Step 2a : make sure trigger sources are unique */
|
|
err |= comedi_check_trigger_is_unique(cmd->start_src);
|
err |= comedi_check_trigger_is_unique(cmd->stop_src);
|
|
/* Step 2b : and mutually compatible */
|
|
if (err)
|
return 2;
|
|
/* Step 3: check if arguments are trivially valid */
|
|
err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
|
|
if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
|
err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
|
|
if (cmd->scan_begin_src == TRIG_TIMER) {
|
/* full speed does 1kHz scans every USB frame */
|
unsigned int arg = 1000000;
|
unsigned int min_arg = arg;
|
|
if (devpriv->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.
|
*/
|
int i = 1;
|
|
/* find a power of 2 for the number of channels */
|
while (i < cmd->chanlist_len)
|
i = i * 2;
|
|
arg /= 8;
|
min_arg = arg * i;
|
}
|
err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
|
min_arg);
|
/* calc the real sampling rate with the rounding errors */
|
arg = (cmd->scan_begin_arg / arg) * arg;
|
err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
|
}
|
|
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 u8 create_adc_command(unsigned int chan, unsigned int range)
|
{
|
u8 p = (range <= 1);
|
u8 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;
|
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
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 */
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
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 = comedi_offset_munge(s, val);
|
|
data[i] = val;
|
}
|
|
ai_read_exit:
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
ret = comedi_readback_insn_read(dev, s, insn, data);
|
mutex_unlock(&devpriv->mut);
|
|
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);
|
__le16 *p = (__le16 *)&devpriv->dux_commands[2];
|
int ret = -EBUSY;
|
int i;
|
|
mutex_lock(&devpriv->mut);
|
|
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++) {
|
unsigned int 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:
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
return ret;
|
}
|
|
static int usbdux_ao_cmdtest(struct comedi_device *dev,
|
struct comedi_subdevice *s, struct comedi_cmd *cmd)
|
{
|
int err = 0;
|
unsigned int flags;
|
|
/* Step 1 : check if triggers are trivially valid */
|
|
err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
|
|
if (0) { /* (devpriv->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) { /* (devpriv->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;
|
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
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;
|
}
|
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
/* unlink only if it is really running */
|
usbdux_pwm_stop(dev, devpriv->pwm_cmd_running);
|
ret = send_dux_commands(dev, USBDUX_CMD_PWM_OFF);
|
mutex_unlock(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
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:
|
mutex_unlock(&devpriv->mut);
|
|
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);
|
u8 *buf;
|
u8 *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;
|
|
mutex_init(&devpriv->mut);
|
|
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;
|
|
mutex_lock(&devpriv->mut);
|
|
/* force unlink all urbs */
|
usbdux_pwm_stop(dev, 1);
|
usbdux_ao_stop(dev, 1);
|
usbdux_ai_stop(dev, 1);
|
|
usbdux_free_usb_buffers(dev);
|
|
mutex_unlock(&devpriv->mut);
|
}
|
|
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);
|
