diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/usbdux.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/usbdux.c | 1729 |
1 files changed, 0 insertions, 1729 deletions
diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c deleted file mode 100644 index 0350f303d557..000000000000 --- a/drivers/staging/comedi/drivers/usbdux.c +++ /dev/null @@ -1,1729 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * usbdux.c - * Copyright (C) 2003-2014 Bernd Porr, mail@berndporr.me.uk - */ - -/* - * Driver: usbdux - * Description: University of Stirling USB DAQ & INCITE Technology Limited - * Devices: [ITL] USB-DUX (usbdux) - * Author: Bernd Porr <mail@berndporr.me.uk> - * Updated: 10 Oct 2014 - * Status: Stable - * - * Connection scheme for the counter at the digital port: - * 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1. - * The sampling rate of the counter is approximately 500Hz. - * - * Note that under USB2.0 the length of the channel list determines - * the max sampling rate. If you sample only one channel you get 8kHz - * sampling rate. If you sample two channels you get 4kHz and so on. - */ - -/* - * I must give credit here to Chris Baugher who - * wrote the driver for AT-MIO-16d. I used some parts of this - * driver. I also must give credits to David Brownell - * who supported me with the USB development. - * - * Bernd Porr - * - * - * Revision history: - * 0.94: D/A output should work now with any channel list combinations - * 0.95: .owner commented out for kernel vers below 2.4.19 - * sanity checks in ai/ao_cmd - * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's - * attach final USB IDs - * moved memory allocation completely to the corresponding comedi - * functions firmware upload is by fxload and no longer by comedi (due to - * enumeration) - * 0.97: USB IDs received, adjusted table - * 0.98: SMP, locking, memory alloc: moved all usb memory alloc - * to the usb subsystem and moved all comedi related memory - * alloc to comedi. - * | kernel | registration | usbdux-usb | usbdux-comedi | comedi | - * 0.99: USB 2.0: changed protocol to isochronous transfer - * IRQ transfer is too buggy and too risky in 2.0 - * for the high speed ISO transfer is now a working version - * available - * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA - * chipsets miss out IRQs. Deeper buffering is needed. - * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling - * rate. - * Firmware vers 1.00 is needed for this. - * Two 16 bit up/down/reset counter with a sampling rate of 1kHz - * And loads of cleaning up, in particular streamlining the - * bulk transfers. - * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4 - * 1.2: added PWM support via EP4 - * 2.0: PWM seems to be stable and is not interfering with the other functions - * 2.1: changed PWM API - * 2.2: added firmware kernel request to fix an udev problem - * 2.3: corrected a bug in bulk timeouts which were far too short - * 2.4: fixed a bug which causes the driver to hang when it ran out of data. - * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it. - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/input.h> -#include <linux/fcntl.h> -#include <linux/compiler.h> - -#include "../comedi_usb.h" - -/* constants for firmware upload and download */ -#define USBDUX_FIRMWARE "usbdux_firmware.bin" -#define USBDUX_FIRMWARE_MAX_LEN 0x2000 -#define USBDUX_FIRMWARE_CMD 0xa0 -#define VENDOR_DIR_IN 0xc0 -#define VENDOR_DIR_OUT 0x40 -#define USBDUX_CPU_CS 0xe600 - -/* usbdux bulk transfer commands */ -#define USBDUX_CMD_MULT_AI 0 -#define USBDUX_CMD_AO 1 -#define USBDUX_CMD_DIO_CFG 2 -#define USBDUX_CMD_DIO_BITS 3 -#define USBDUX_CMD_SINGLE_AI 4 -#define USBDUX_CMD_TIMER_RD 5 -#define USBDUX_CMD_TIMER_WR 6 -#define USBDUX_CMD_PWM_ON 7 -#define USBDUX_CMD_PWM_OFF 8 - -/* timeout for the USB-transfer in ms */ -#define BULK_TIMEOUT 1000 - -/* 300Hz max frequ under PWM */ -#define MIN_PWM_PERIOD ((long)(1E9 / 300)) - -/* Default PWM frequency */ -#define PWM_DEFAULT_PERIOD ((long)(1E9 / 100)) - -/* Size of one A/D value */ -#define SIZEADIN ((sizeof(u16))) - -/* - * Size of the input-buffer IN BYTES - * Always multiple of 8 for 8 microframes which is needed in the highspeed mode - */ -#define SIZEINBUF (8 * SIZEADIN) - -/* 16 bytes. */ -#define SIZEINSNBUF 16 - -/* size of one value for the D/A converter: channel and value */ -#define SIZEDAOUT ((sizeof(u8) + sizeof(u16))) - -/* - * Size of the output-buffer in bytes - * Actually only the first 4 triplets are used but for the - * high speed mode we need to pad it to 8 (microframes). - */ -#define SIZEOUTBUF (8 * SIZEDAOUT) - -/* - * Size of the buffer for the dux commands: just now max size is determined - * by the analogue out + command byte + panic bytes... - */ -#define SIZEOFDUXBUFFER (8 * SIZEDAOUT + 2) - -/* Number of in-URBs which receive the data: min=2 */ -#define NUMOFINBUFFERSFULL 5 - -/* Number of out-URBs which send the data: min=2 */ -#define NUMOFOUTBUFFERSFULL 5 - -/* Number of in-URBs which receive the data: min=5 */ -/* must have more buffers due to buggy USB ctr */ -#define NUMOFINBUFFERSHIGH 10 - -/* Number of out-URBs which send the data: min=5 */ -/* must have more buffers due to buggy USB ctr */ -#define NUMOFOUTBUFFERSHIGH 10 - -/* number of retries to get the right dux command */ -#define RETRIES 10 - -static const struct comedi_lrange range_usbdux_ai_range = { - 4, { - BIP_RANGE(4.096), - BIP_RANGE(4.096 / 2), - UNI_RANGE(4.096), - UNI_RANGE(4.096 / 2) - } -}; - -static const struct comedi_lrange range_usbdux_ao_range = { - 2, { - BIP_RANGE(4.096), - UNI_RANGE(4.096) - } -}; - -struct usbdux_private { - /* actual number of in-buffers */ - int n_ai_urbs; - /* actual number of out-buffers */ - int n_ao_urbs; - /* ISO-transfer handling: buffers */ - struct urb **ai_urbs; - struct urb **ao_urbs; - /* pwm-transfer handling */ - struct urb *pwm_urb; - /* PWM period */ - unsigned int pwm_period; - /* PWM internal delay for the GPIF in the FX2 */ - u8 pwm_delay; - /* size of the PWM buffer which holds the bit pattern */ - int pwm_buf_sz; - /* input buffer for the ISO-transfer */ - __le16 *in_buf; - /* input buffer for single insn */ - __le16 *insn_buf; - - unsigned int high_speed:1; - unsigned int ai_cmd_running:1; - unsigned int ao_cmd_running:1; - unsigned int pwm_cmd_running:1; - - /* time between samples in units of the timer */ - unsigned int ai_timer; - unsigned int ao_timer; - /* counter between aquisitions */ - unsigned int ai_counter; - unsigned int ao_counter; - /* interval in frames/uframes */ - unsigned int ai_interval; - /* commands */ - u8 *dux_commands; - struct mutex mut; -}; - -static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs) -{ - int i; - - for (i = 0; i < num_urbs; i++) - usb_kill_urb(urbs[i]); -} - -static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink) -{ - struct usbdux_private *devpriv = dev->private; - - if (do_unlink && devpriv->ai_urbs) - usbdux_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs); - - devpriv->ai_cmd_running = 0; -} - -static int usbdux_ai_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct usbdux_private *devpriv = dev->private; - - /* prevent other CPUs from submitting new commands just now */ - mutex_lock(&devpriv->mut); - /* unlink only if the urb really has been submitted */ - usbdux_ai_stop(dev, devpriv->ai_cmd_running); - mutex_unlock(&devpriv->mut); - - return 0; -} - -static void usbduxsub_ai_handle_urb(struct comedi_device *dev, - struct comedi_subdevice *s, - struct urb *urb) -{ - struct usbdux_private *devpriv = dev->private; - struct comedi_async *async = s->async; - struct comedi_cmd *cmd = &async->cmd; - int ret; - int i; - - devpriv->ai_counter--; - if (devpriv->ai_counter == 0) { - devpriv->ai_counter = devpriv->ai_timer; - - /* get the data from the USB bus and hand it over to comedi */ - for (i = 0; i < cmd->chanlist_len; i++) { - unsigned int range = CR_RANGE(cmd->chanlist[i]); - u16 val = le16_to_cpu(devpriv->in_buf[i]); - - /* bipolar data is two's-complement */ - if (comedi_range_is_bipolar(s, range)) - val = comedi_offset_munge(s, val); - - /* transfer data */ - if (!comedi_buf_write_samples(s, &val, 1)) - return; - } - - if (cmd->stop_src == TRIG_COUNT && - async->scans_done >= cmd->stop_arg) - async->events |= COMEDI_CB_EOA; - } - - /* if command is still running, resubmit urb */ - if (!(async->events & COMEDI_CB_CANCEL_MASK)) { - urb->dev = comedi_to_usb_dev(dev); - ret = usb_submit_urb(urb, GFP_ATOMIC); - if (ret < 0) { - dev_err(dev->class_dev, - "urb resubmit failed in int-context! err=%d\n", - ret); - if (ret == -EL2NSYNC) - dev_err(dev->class_dev, - "buggy USB host controller or bug in IRQ handler!\n"); - async->events |= COMEDI_CB_ERROR; - } - } -} - -static void usbduxsub_ai_isoc_irq(struct urb *urb) -{ - struct comedi_device *dev = urb->context; - struct comedi_subdevice *s = dev->read_subdev; - struct comedi_async *async = s->async; - struct usbdux_private *devpriv = dev->private; - - /* exit if not running a command, do not resubmit urb */ - if (!devpriv->ai_cmd_running) - return; - - switch (urb->status) { - case 0: - /* copy the result in the transfer buffer */ - memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF); - usbduxsub_ai_handle_urb(dev, s, urb); - break; - - case -EILSEQ: - /* - * error in the ISOchronous data - * we don't copy the data into the transfer buffer - * and recycle the last data byte - */ - dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n"); - usbduxsub_ai_handle_urb(dev, s, urb); - break; - - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - case -ECONNABORTED: - /* after an unlink command, unplug, ... etc */ - async->events |= COMEDI_CB_ERROR; - break; - - default: - /* a real error */ - dev_err(dev->class_dev, - "Non-zero urb status received in ai intr context: %d\n", - urb->status); - async->events |= COMEDI_CB_ERROR; - break; - } - - /* - * comedi_handle_events() cannot be used in this driver. The (*cancel) - * operation would unlink the urb. - */ - if (async->events & COMEDI_CB_CANCEL_MASK) - usbdux_ai_stop(dev, 0); - - comedi_event(dev, s); -} - -static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink) -{ - struct usbdux_private *devpriv = dev->private; - - if (do_unlink && devpriv->ao_urbs) - usbdux_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs); - - devpriv->ao_cmd_running = 0; -} - -static int usbdux_ao_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct usbdux_private *devpriv = dev->private; - - /* prevent other CPUs from submitting a command just now */ - mutex_lock(&devpriv->mut); - /* unlink only if it is really running */ - usbdux_ao_stop(dev, devpriv->ao_cmd_running); - mutex_unlock(&devpriv->mut); - - return 0; -} - -static void usbduxsub_ao_handle_urb(struct comedi_device *dev, - struct comedi_subdevice *s, - struct urb *urb) -{ - struct usbdux_private *devpriv = dev->private; - struct comedi_async *async = s->async; - struct comedi_cmd *cmd = &async->cmd; - u8 *datap; - int ret; - int i; - - devpriv->ao_counter--; - if (devpriv->ao_counter == 0) { - devpriv->ao_counter = devpriv->ao_timer; - - if (cmd->stop_src == TRIG_COUNT && - async->scans_done >= cmd->stop_arg) { - async->events |= COMEDI_CB_EOA; - return; - } - - /* transmit data to the USB bus */ - datap = urb->transfer_buffer; - *datap++ = cmd->chanlist_len; - for (i = 0; i < cmd->chanlist_len; i++) { - unsigned int chan = CR_CHAN(cmd->chanlist[i]); - unsigned short val; - - if (!comedi_buf_read_samples(s, &val, 1)) { - dev_err(dev->class_dev, "buffer underflow\n"); - async->events |= COMEDI_CB_OVERFLOW; - return; - } - - /* pointer to the DA */ - *datap++ = val & 0xff; - *datap++ = (val >> 8) & 0xff; - *datap++ = chan << 6; - s->readback[chan] = val; - } - } - - /* if command is still running, resubmit urb for BULK transfer */ - if (!(async->events & COMEDI_CB_CANCEL_MASK)) { - urb->transfer_buffer_length = SIZEOUTBUF; - urb->dev = comedi_to_usb_dev(dev); - urb->status = 0; - if (devpriv->high_speed) - urb->interval = 8; /* uframes */ - else - urb->interval = 1; /* frames */ - urb->number_of_packets = 1; - urb->iso_frame_desc[0].offset = 0; - urb->iso_frame_desc[0].length = SIZEOUTBUF; - urb->iso_frame_desc[0].status = 0; - ret = usb_submit_urb(urb, GFP_ATOMIC); - if (ret < 0) { - dev_err(dev->class_dev, - "ao urb resubm failed in int-cont. ret=%d", - ret); - if (ret == -EL2NSYNC) - dev_err(dev->class_dev, - "buggy USB host controller or bug in IRQ handling!\n"); - async->events |= COMEDI_CB_ERROR; - } - } -} - -static void usbduxsub_ao_isoc_irq(struct urb *urb) -{ - struct comedi_device *dev = urb->context; - struct comedi_subdevice *s = dev->write_subdev; - struct comedi_async *async = s->async; - struct usbdux_private *devpriv = dev->private; - - /* exit if not running a command, do not resubmit urb */ - if (!devpriv->ao_cmd_running) - return; - - switch (urb->status) { - case 0: - usbduxsub_ao_handle_urb(dev, s, urb); - break; - - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - case -ECONNABORTED: - /* after an unlink command, unplug, ... etc */ - async->events |= COMEDI_CB_ERROR; - break; - - default: - /* a real error */ - dev_err(dev->class_dev, - "Non-zero urb status received in ao intr context: %d\n", - urb->status); - async->events |= COMEDI_CB_ERROR; - break; - } - - /* - * comedi_handle_events() cannot be used in this driver. The (*cancel) - * operation would unlink the urb. - */ - if (async->events & COMEDI_CB_CANCEL_MASK) - usbdux_ao_stop(dev, 0); - - comedi_event(dev, s); -} - -static int usbdux_submit_urbs(struct comedi_device *dev, - struct urb **urbs, int num_urbs, - int input_urb) -{ - struct usb_device *usb = comedi_to_usb_dev(dev); - struct usbdux_private *devpriv = dev->private; - struct urb *urb; - int ret; - int i; - - /* Submit all URBs and start the transfer on the bus */ - for (i = 0; i < num_urbs; i++) { - urb = urbs[i]; - - /* in case of a resubmission after an unlink... */ - if (input_urb) - urb->interval = devpriv->ai_interval; - urb->context = dev; - urb->dev = usb; - urb->status = 0; - urb->transfer_flags = URB_ISO_ASAP; - - ret = usb_submit_urb(urb, GFP_ATOMIC); - if (ret) - return ret; - } - return 0; -} - -static int usbdux_ai_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, struct comedi_cmd *cmd) -{ - struct usbdux_private *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; - - 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); - - mutex_destroy(&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); |