diff options
Diffstat (limited to 'drivers/comedi/drivers/usbdux.c')
| -rw-r--r-- | drivers/comedi/drivers/usbdux.c | 1728 |
1 files changed, 1728 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/usbdux.c b/drivers/comedi/drivers/usbdux.c new file mode 100644 index 000000000..92d514b3c --- /dev/null +++ b/drivers/comedi/drivers/usbdux.c @@ -0,0 +1,1728 @@ +// 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 <linux/comedi/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); |