/*
comedi/drivers/vmk80xx.c
Velleman USB Interface Board Kernel-Space Driver
Copyright (C) 2009 Manuel Gebele <forensixs@gmx.de>, Germany
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 2000 David A. Schleef <ds@schleef.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
Driver: vmk80xx
Description: Velleman USB Interface Board Kernel-Space Driver
Devices: K8055, K8061 (in development)
Author: Manuel Gebele <forensixs@gmx.de>
Updated: Tue, 21 Apr 2009 19:40:55 +0200
Status: works
*/
#include <linux/kernel.h>
#include <linux/comedidev.h> /* comedi definitions */
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/usb.h>
#include <asm/uaccess.h>
/* ------------------------------------------------------------------------ */
#define VMK80XX_MODULE_DESC "Velleman USB Interface Board Kernel-Space Driver"
#define VMK80XX_MODULE_DEVICE "Velleman K8055/K8061 USB Interface Board"
#define VMK80XX_MODULE_AUTHOR "Copyright (C) 2009 Manuel Gebele, Germany"
#define VMK80XX_MODULE_LICENSE "GPL"
#define VMK80XX_MODULE_VERSION "0.7.76"
/* Module device ID's */
static struct usb_device_id vm_id_table[] = {
/* k8055 */
{ USB_DEVICE(0x10cf, 0x5500 + 0x00) }, /* @ddr. 0 */
{ USB_DEVICE(0x10cf, 0x5500 + 0x01) }, /* @ddr. 1 */
{ USB_DEVICE(0x10cf, 0x5500 + 0x02) }, /* @ddr. 2 */
{ USB_DEVICE(0x10cf, 0x5500 + 0x03) }, /* @ddr. 3 */
/* k8061 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x00) }, /* @ddr. 0 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x01) }, /* @ddr. 1 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x02) }, /* @ddr. 2 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x03) }, /* @ddr. 3 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x04) }, /* @ddr. 4 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x05) }, /* @ddr. 5 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x06) }, /* @ddr. 6 */
{ USB_DEVICE(0x10cf, 0x8061 + 0x07) }, /* @ddr. 7 */
{ } /* terminating entry */
};
MODULE_DEVICE_TABLE(usb, vm_id_table);
MODULE_AUTHOR(VMK80XX_MODULE_AUTHOR);
MODULE_DESCRIPTION(VMK80XX_MODULE_DESC);
MODULE_SUPPORTED_DEVICE(VMK80XX_MODULE_DEVICE);
MODULE_VERSION(VMK80XX_MODULE_VERSION);
MODULE_LICENSE(VMK80XX_MODULE_LICENSE);
/* ------------------------------------------------------------------------ */
#define CONFIG_VMK80XX_DEBUG
//#undef CONFIG_COMEDI_DEBUG /* Uncommend this line to disable comedi debug */
#undef CONFIG_VMK80XX_DEBUG /* Commend this line to enable vmk80xx debug */
#ifdef CONFIG_COMEDI_DEBUG
static int cm_dbg = 1;
#else /* !CONFIG_COMEDI_DEBUG */
static int cm_dbg = 0;
#endif /* !CONFIG_COMEDI_DEBUG */
#ifdef CONFIG_VMK80XX_DEBUG
static int vm_dbg = 1;
#else /* !CONFIG_VMK80XX_DEBUG */
static int vm_dbg = 0;
#endif /* !CONFIG_VMK80XX_DEBUG */
/* Define our own debug macros */
#define DBGCM(fmt, arg...) do { if (cm_dbg) printk(fmt, ##arg); } while (0)
#define DBGVM(fmt, arg...) do { if (vm_dbg) printk(fmt, ##arg); } while (0)
/* Velleman K8055 specific stuff */
#define VMK8055_DI 0 /* digital input offset */
#define VMK8055_DO 1 /* digital output offset */
#define VMK8055_AO1 2 /* analog output channel 1 offset */
#define VMK8055_AO2 3 /* analog output channel 2 offset */
#define VMK8055_CNT1 4 /* counter 1 offset */
#define VMK8055_CNT2 6 /* counter 2 offset */
#define VMK8055_CMD_RST 0x00 /* reset device registers */
#define VMK8055_CMD_DEB1 0x01 /* debounce time for pulse counter 1 */
#define VMK8055_CMD_DEB2 0x02 /* debounce time for pulse counter 2 */
#define VMK8055_CMD_RST_CNT1 0x03 /* reset pulse counter 1 */
#define VMK8055_CMD_RST_CNT2 0x04 /* reset pulse counter 2 */
#define VMK8055_CMD_AD 0x05 /* write to analog or digital channel */
#define VMK8055_EP_OUT 0x01 /* out endpoint address */
#define VMK8055_EP_IN 0x81 /* in endpoint address */
#define VMK8055_EP_SIZE 8 /* endpoint max packet size */
#define VMK8055_EP_INTERVAL 20 /* general conversion time per command */
#define VMK8055_MAX_BOARDS 16
/* Structure to hold all of our device specific stuff */
struct vmk80xx_usb {
struct usb_interface *intf;
struct semaphore limit_sem;
wait_queue_head_t read_wait;
wait_queue_head_t write_wait;
size_t irq_out_endpoint_size;
__u8 irq_out_endpoint;
int irq_out_interval;
unsigned char *irq_out_buf;
struct urb *irq_out_urb;
int irq_out_busy;
size_t irq_in_endpoint_size;
__u8 irq_in_endpoint;
int irq_in_interval;
unsigned char *irq_in_buf;
struct urb *irq_in_urb;
int irq_in_busy;
int irq_in_running;
int probed;
int attached;
int id;
};
static struct vmk80xx_usb vm_boards[VMK8055_MAX_BOARDS];
/* ---------------------------------------------------------------------------
* Abort active transfers and tidy up allocated resources.
--------------------------------------------------------------------------- */
static void vm_abort_transfers(struct vmk80xx_usb *vm)
{
DBGVM("comedi#: vmk80xx: %s\n", __func__);
if (vm->irq_in_running) {
vm->irq_in_running = 0;
if (vm->intf)
usb_kill_urb(vm->irq_in_urb);
}
if (vm->irq_out_busy && vm->intf)
usb_kill_urb(vm->irq_out_urb);
}
static void vm_delete(struct vmk80xx_usb *vm)
{
DBGVM("comedi#: vmk80xx: %s\n", __func__);
vm_abort_transfers(vm);
/* Deallocate usb urbs and kernel buffers */
if (vm->irq_in_urb)
usb_free_urb(vm->irq_in_urb);
if (vm->irq_out_urb);
usb_free_urb(vm->irq_out_urb);
if (vm->irq_in_buf)
kfree(vm->irq_in_buf);
if (vm->irq_out_buf)
kfree(vm->irq_out_buf);
}
/* ---------------------------------------------------------------------------
* Interrupt in and interrupt out callback for usb data transfer.
--------------------------------------------------------------------------- */
static void vm_irq_in_callback(struct urb *urb)
{
struct vmk80xx_usb *vm = (struct vmk80xx_usb *)urb->context;
int err;
DBGVM("comedi#: vmk80xx: %s\n", __func__);
switch (urb->status) {
case 0: /* success */
break;
case -ENOENT:
case -ECONNRESET:
case -ESHUTDOWN:
break;
default:
DBGCM("comedi#: vmk80xx: %s - nonzero urb status (%d)\n",
__func__, urb->status);
goto resubmit; /* maybe we can recover */
}
goto exit;
resubmit:
if (vm->irq_in_running && vm->intf) {
err = usb_submit_urb(vm->irq_in_urb, GFP_ATOMIC);
if (!err) goto exit;
/* FALL THROUGH */
DBGCM("comedi#: vmk80xx: %s - submit urb failed (err# %d)\n",
__func__, err);
}
exit:
vm->irq_in_busy = 0;
/* interrupt-in pipe is available again */
wake_up_interruptible(&vm->read_wait);
}
static void vm_irq_out_callback(struct urb *urb)
{
struct vmk80xx_usb *vm;
DBGVM("comedi#: vmk80xx: %s\n", __func__);
/* sync/async unlink (hardware going away) faults aren't errors */
if (urb->status && !(urb->status == -ENOENT
|| urb->status == -ECONNRESET
|| urb->status == -ESHUTDOWN))
DBGCM("comedi#: vmk80xx: %s - nonzero urb status (%d)\n",
__func__, urb->status);
vm = (struct vmk80xx_usb *)urb->context;
vm->irq_out_busy = 0;
/* interrupt-out pipe is available again */
wake_up_interruptible(&vm->write_wait);
}
/* ---------------------------------------------------------------------------
* Interface for digital/analog input/output and counter funcs (see below).
--------------------------------------------------------------------------- */
static int vm_read(struct vmk80xx_usb *vm)
{
struct usb_device *udev;
int retval = -ENODEV;
DBGVM("comedi#: vmk80xx: %s\n", __func__);
/* Verify that the device wasn't un-plugged */
if (!vm->intf) {
DBGCM("comedi#: vmk80xx: %s - No dev or dev un-plugged\n",
__func__);
goto exit;
}
if (vm->irq_in_busy) {
retval = wait_event_interruptible(vm->read_wait,
!vm->irq_in_busy);
if (retval < 0) { /* we were interrupted by a signal */
retval = -ERESTART;
goto exit;
}
}
udev = interface_to_usbdev(vm->intf);
/* Fill the urb and send off */
usb_fill_int_urb(vm->irq_in_urb,
udev,
usb_rcvintpipe(udev, vm->irq_in_endpoint),
vm->irq_in_buf,
vm->irq_in_endpoint_size,
vm_irq_in_callback,
vm,
vm->irq_in_interval);
vm->irq_in_running = 1;
vm->irq_in_busy = 1; /* disallow following read request's */
retval = usb_submit_urb(vm->irq_in_urb, GFP_KERNEL);
if (!retval) goto exit; /* success */
/* FALL TROUGH */
vm->irq_in_running = 0;
DBGCM("comedi#: vmk80xx: %s - submit urb failed (err# %d)\n",
__func__, retval);
exit:
return retval;
}
static int vm_write(struct vmk80xx_usb *vm, unsigned char cmd)
{
struct usb_device *udev;
int retval = -ENODEV;
DBGVM("comedi#: vmk80xx: %s\n", __func__);
/* Verify that the device wasn't un-plugged */
if (!vm->intf) {
DBGCM("comedi#: vmk80xx: %s - No dev or dev un-plugged\n",
__func__);
goto exit;
}
if (vm->irq_out_busy) {
retval = wait_event_interruptible(vm->write_wait,
!vm->irq_out_busy);
if (retval < 0) { /* we were interrupted by a signal */
retval = -ERESTART;
goto exit;
}
}
udev = interface_to_usbdev(vm->intf);
/* Set the command which should send to the device */
vm->irq_out_buf[0] = cmd;
/* Fill the urb and send off */
usb_fill_int_urb(vm->irq_out_urb,
udev,
usb_sndintpipe(udev, vm->irq_out_endpoint),
vm->irq_out_buf,
vm->irq_out_endpoint_size,
vm_irq_out_callback,
vm,
vm->irq_out_interval);
vm->irq_out_busy = 1; /* disallow following write request's */
wmb();
retval = usb_submit_urb(vm->irq_out_urb, GFP_KERNEL);
if (!retval) goto exit; /* success */
/* FALL THROUGH */
vm->irq_out_busy = 0;
DBGCM("comedi#: vmk80xx: %s - submit urb failed (err# %d)\n",
__func__, retval);
exit:
return retval;
}
/* ---------------------------------------------------------------------------
* COMEDI-Interface (callback functions for the userspacs apps).
--------------------------------------------------------------------------- */
static int vm_ai_rinsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int ch, ch_offs, i;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-in pipe busy ? */
if (vm->irq_in_busy) {
retval = -EBUSY;
goto error;
}
ch = CR_CHAN(insn->chanspec);
ch_offs = (!ch) ? VMK8055_AO1 : VMK8055_AO2;
for (i = 0; i < insn->n; i++) {
retval = vm_read(vm);
if (retval)
goto error;
/* NOTE:
* The input voltage of the selected 8-bit AD channel
* is converted to a value which lies between
* 0 and 255.
*/
data[i] = vm->irq_in_buf[ch_offs];
}
up(&vm->limit_sem);
/* Return the number of samples read */
return i;
error:
up(&vm->limit_sem);
return retval;
}
static int vm_ao_winsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int ch, ch_offs, i;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-out pipe busy ? */
if (vm->irq_out_busy) {
retval = -EBUSY;
goto error;
}
ch = CR_CHAN(insn->chanspec);
ch_offs = (!ch) ? VMK8055_AO1 : VMK8055_AO2;
for (i = 0; i < insn->n; i++) {
/* NOTE:
* The indicated 8-bit DA channel is altered according
* to the new data. This means that the data corresponds
* to a specific voltage. The value 0 corresponds to a
* minimum output voltage (+-0 Volt) and the value 255
* corresponds to a maximum output voltage (+5 Volt).
*/
vm->irq_out_buf[ch_offs] = data[i];
retval = vm_write(vm, VMK8055_CMD_AD);
if (retval)
goto error;
}
up(&vm->limit_sem);
/* Return the number of samples write */
return i;
error:
up(&vm->limit_sem);
return retval;
}
static int vm_di_rinsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int ch, i, inp;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-in pipe busy ? */
if (vm->irq_in_busy) {
retval = -EBUSY;
goto error;
}
for (i = 0, ch = CR_CHAN(insn->chanspec); i < insn->n; i++) {
retval = vm_read(vm);
if (retval)
goto error;
/* NOTE:
* The status of the selected digital input channel is read.
*/
inp = (((vm->irq_in_buf[VMK8055_DI] >> 4) & 0x03) |
((vm->irq_in_buf[VMK8055_DI] << 2) & 0x04) |
((vm->irq_in_buf[VMK8055_DI] >> 3) & 0x18));
data[i] = ((inp & (1 << ch)) > 0);
}
up(&vm->limit_sem);
return i;
error:
up(&vm->limit_sem);
return retval;
}
static int vm_do_winsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int ch, i, mask;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-out pipe busy ? */
if (vm->irq_out_busy) {
retval = -EBUSY;
goto error;
}
for (i = 0, ch = CR_CHAN(insn->chanspec); i < insn->n; i++) {
/* NOTE:
* The selected digital output channel is set or cleared.
*/
mask = (data[i] == 1)
? vm->irq_out_buf[VMK8055_DO] | (1 << ch)
: vm->irq_out_buf[VMK8055_DO] ^ (1 << ch);
vm->irq_out_buf[VMK8055_DO] = mask;
retval = vm_write(vm, VMK8055_CMD_AD);
if (retval)
goto error;
}
up(&vm->limit_sem);
return i;
error:
up(&vm->limit_sem);
return retval;
}
static int vm_cnt_rinsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int cnt, cnt_offs, i;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-in pipe busy ? */
if (vm->irq_in_busy) {
retval = -EBUSY;
goto error;
}
cnt = CR_CHAN(insn->chanspec);
cnt_offs = (!cnt) ? VMK8055_CNT1 : VMK8055_CNT2;
for (i = 0; i < insn->n; i++) {
retval = vm_read(vm);
if (retval)
goto error;
/* NOTE:
* The status of the selected 16-bit pulse counter is
* read. The counter # 1 counts the pulses fed to the
* input Inp1 and the counter # 2 counts the pulses fed
* to the input Inp2.
*/
data[i] = vm->irq_in_buf[cnt_offs];
}
up(&vm->limit_sem);
return i;
error:
up(&vm->limit_sem);
return retval;
}
static int vm_cnt_winsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int cnt, cnt_offs, cmd, i;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-out pipe busy ? */
if (vm->irq_out_busy) {
retval = -EBUSY;
goto error;
}
cnt = CR_CHAN(insn->chanspec);
cnt_offs = (!cnt) ? VMK8055_CNT1 : VMK8055_CNT2;
cmd = (!cnt) ? VMK8055_CMD_RST_CNT1 : VMK8055_CMD_RST_CNT2;
for (i = 0; i < insn->n; i++) {
/* NOTE:
* The selected 16-bit pulse counter is reset.
*/
vm->irq_out_buf[cnt_offs] = 0x00;
retval = vm_write(vm, cmd);
if (retval)
goto error;
}
up(&vm->limit_sem);
return i;
error:
up(&vm->limit_sem);
return retval;
}
static int vm_cnt_cinsn(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, unsigned int *data)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
int cnt, cmd, i;
unsigned int debtime, val;
int retval = -EFAULT;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!(vm = (struct vmk80xx_usb *)dev->private))
return retval;
down(&vm->limit_sem);
/* We have an attached board ? */
if (!vm->probed) {
retval = -ENODEV;
goto error;
}
/* interrupt-out pipe busy ? */
if (vm->irq_out_busy) {
retval = -EBUSY;
goto error;
}
cnt = CR_CHAN(insn->chanspec);
cmd = (!cnt) ? VMK8055_CMD_DEB1 : VMK8055_CMD_DEB2;
/* NOTE:
* The counter inputs are debounced in the software to prevent
* false triggering when mechanical switches or relay inputs
* are used. The debounce time is equal for both falling and
* rising edges. The default debounce time is 2ms. This means
* the counter input must be stable for at least 2ms before it
* is recognised , giving the maximum count rate of about 200
* counts per second. If the debounce time is set to 0, then
* the maximum counting rate is about 2000 counts per second.
*/
for (i = 0; i < insn->n; i++) {
debtime = data[i];
if (debtime == 0)
debtime = 1;
/* --------------------------------------------------
* From libk8055.c
* ---------------
* Copyleft (C) 2005 by Sven Lindberg;
* Copyright (C) 2007 by Pjetur G. Hjaltason:
* By testing and measuring on the other hand I found
* the formula dbt=0.115*x^2.........
*
* I'm using here an adapted formula to avoid floating
* point operations inside the kernel. The time set
* with this formula is within +-4% +- 1.
* ------------------------------------------------ */
val = int_sqrt(debtime * 1000 / 115);
if (((val + 1) * val) < debtime * 1000 / 115)
val += 1;
vm->irq_out_buf[cnt+6] = val;
retval = vm_write(vm, cmd);
if (retval)
goto error;
}
up(&vm->limit_sem);
return i;
error:
up(&vm->limit_sem);
return retval;
}
/* Comedi subdevice offsets */
#define VMK8055_SUBD_AI_OFFSET 0
#define VMK8055_SUBD_AO_OFFSET 1
#define VMK8055_SUBD_DI_OFFSET 2
#define VMK8055_SUBD_DO_OFFSET 3
#define VMK8055_SUBD_CT_OFFSET 4
static DEFINE_MUTEX(glb_mutex);
/* ---------------------------------------------------------------------------
* Hook-up (or deallocate) the virtual device file '/dev/comedi[minor]' with
* the vmk80xx driver (comedi_config/rmmod).
--------------------------------------------------------------------------- */
static int vm_attach(comedi_device *dev, comedi_devconfig *it)
{
comedi_subdevice *s;
int minor = dev->minor;
int idx, i;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
mutex_lock(&glb_mutex);
/* Prepare user info... */
printk("comedi%d: vmk80xx: ", minor);
idx = -1;
/* Find the last valid device which has been detected
* by the probe function */;
for (i = 0; i < VMK8055_MAX_BOARDS; i++)
if (vm_boards[i].probed && !vm_boards[i].attached) {
idx = i;
break;
}
if (idx == -1) {
printk("no boards attached\n");
mutex_unlock(&glb_mutex);
return -ENODEV;
}
down(&vm_boards[idx].limit_sem);
/* OK, at that time we've an attached board and this is
* the first execution of the comedi_config command for
* this board */
printk("board #%d is attached to comedi\n", vm_boards[idx].id);
dev->board_name = "vmk80xx";
dev->private = vm_boards + idx; /* will be allocated in vm_probe */
/* Subdevices section -> set properties */
if (alloc_subdevices(dev, 5) < 0) {
printk("comedi%d: vmk80xx: couldn't allocate subdevs\n",
minor);
up(&vm_boards[idx].limit_sem);
mutex_unlock(&glb_mutex);
return -ENOMEM;
}
s = dev->subdevices + VMK8055_SUBD_AI_OFFSET;
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = 2;
s->maxdata = 0xff; /* +5 Volt */
s->range_table = &range_unipolar5; /* +-0 Volt - +5 Volt */
s->insn_read = vm_ai_rinsn;
s = dev->subdevices + VMK8055_SUBD_AO_OFFSET;
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITEABLE | SDF_GROUND;
s->n_chan = 2;
s->maxdata = 0xff;
s->range_table = &range_unipolar5;
s->insn_write = vm_ao_winsn;
s = dev->subdevices + VMK8055_SUBD_DI_OFFSET;
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = 5;
s->insn_read = vm_di_rinsn;
s = dev->subdevices + VMK8055_SUBD_DO_OFFSET;
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITEABLE | SDF_GROUND;
s->n_chan = 8;
s->maxdata = 1;
s->insn_write = vm_do_winsn;
s = dev->subdevices + VMK8055_SUBD_CT_OFFSET;
s->type = COMEDI_SUBD_COUNTER;
s->subdev_flags = SDF_READABLE | SDF_WRITEABLE;
s->n_chan = 2;
s->insn_read = vm_cnt_rinsn;
s->insn_write = vm_cnt_winsn; /* accept only a channel # as arg */
s->insn_config = vm_cnt_cinsn;
/* Register the comedi board connection */
vm_boards[idx].attached = 1;
up(&vm_boards[idx].limit_sem);
mutex_unlock(&glb_mutex);
return 0;
}
static int vm_detach(comedi_device *dev)
{
struct vmk80xx_usb *vm;
int minor = dev->minor;
DBGVM("comedi%d: vmk80xx: %s\n", minor, __func__);
if (!dev) { /* FIXME: I don't know if i need that here */
printk("comedi%d: vmk80xx: %s - dev is NULL\n",
minor, __func__);
return -EFAULT;
}
if (!(vm = (struct vmk80xx_usb *)dev->private)) {
printk("comedi%d: vmk80xx: %s - dev->private is NULL\n",
minor, __func__);
return -EFAULT;
}
/* NOTE: dev->private and dev->subdevices are deallocated
* automatically by the comedi core */
down(&vm->limit_sem);
dev->private = NULL;
vm->attached = 0;
printk("comedi%d: vmk80xx: board #%d removed from comedi core\n",
minor, vm->id);
up(&vm->limit_sem);
return 0;
}
/* ---------------------------------------------------------------------------
* Hook-up or remove the Velleman board from the usb.
--------------------------------------------------------------------------- */
static int vm_probe(struct usb_interface *itf, const struct usb_device_id *id)
{
struct usb_device *udev;
int idx, i;
u16 product_id;
int retval = -ENOMEM;
DBGVM("comedi#: vmk80xx: %s\n", __func__);
mutex_lock(&glb_mutex);
udev = interface_to_usbdev(itf);
idx = -1;
/* TODO: k8061 only theoretically supported yet */
product_id = le16_to_cpu(udev->descriptor.idProduct);
if (product_id == 0x8061) {
printk("comedi#: vmk80xx: Velleman K8061 detected "
"(no COMEDI support available yet)\n");
mutex_unlock(&glb_mutex);
return -ENODEV;
}
/* Look for a free place to put the board into the array */
for (i = 0; i < VMK8055_MAX_BOARDS; i++) {
if (!vm_boards[i].probed) {
idx = i;
i = VMK8055_MAX_BOARDS;
}
}
if (idx == -1) {
printk("comedi#: vmk80xx: only FOUR boards supported\n");
mutex_unlock(&glb_mutex);
return -EMFILE;
}
/* Initialize device states (hard coded) */
vm_boards[idx].intf = itf;
/* interrupt-in context */
vm_boards[idx].irq_in_endpoint = VMK8055_EP_IN;
vm_boards[idx].irq_in_interval = VMK8055_EP_INTERVAL;
vm_boards[idx].irq_in_endpoint_size = VMK8055_EP_SIZE;
vm_boards[idx].irq_in_buf = kmalloc(VMK8055_EP_SIZE, GFP_KERNEL);
if (!vm_boards[idx].irq_in_buf) {
err("comedi#: vmk80xx: couldn't alloc irq_in_buf\n");
goto error;
}
/* interrupt-out context */
vm_boards[idx].irq_out_endpoint = VMK8055_EP_OUT;
vm_boards[idx].irq_out_interval = VMK8055_EP_INTERVAL;
vm_boards[idx].irq_out_endpoint_size = VMK8055_EP_SIZE;
vm_boards[idx].irq_out_buf = kmalloc(VMK8055_EP_SIZE, GFP_KERNEL);
if (!vm_boards[idx].irq_out_buf) {
err("comedi#: vmk80xx: couldn't alloc irq_out_buf\n");
goto error;
}
/* Endpoints located ? */
if (!vm_boards[idx].irq_in_endpoint) {
err("comedi#: vmk80xx: int-in endpoint not found\n");
goto error;
}
if (!vm_boards[idx].irq_out_endpoint) {
err("comedi#: vmk80xx: int-out endpoint not found\n");
goto error;
}
/* Try to allocate in/out urbs */
vm_boards[idx].irq_in_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!vm_boards[idx].irq_in_urb) {
err("comedi#: vmk80xx: couldn't alloc irq_in_urb\n");
goto error;
}
vm_boards[idx].irq_out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!vm_boards[idx].irq_out_urb) {
err("comedi#: vmk80xx: couldn't alloc irq_out_urb\n");
goto error;
}
/* Reset the device */
vm_boards[idx].irq_out_buf[0] = VMK8055_CMD_RST;
vm_boards[idx].irq_out_buf[1] = 0x00;
vm_boards[idx].irq_out_buf[2] = 0x00;
vm_boards[idx].irq_out_buf[3] = 0x00;
vm_boards[idx].irq_out_buf[4] = 0x00;
vm_boards[idx].irq_out_buf[5] = 0x00;
vm_boards[idx].irq_out_buf[6] = 0x00;
vm_boards[idx].irq_out_buf[7] = 0x00;
usb_fill_int_urb(vm_boards[idx].irq_out_urb,
udev,
usb_sndintpipe(udev,
vm_boards[idx].irq_out_endpoint),
vm_boards[idx].irq_out_buf,
vm_boards[idx].irq_out_endpoint_size,
vm_irq_out_callback,
&vm_boards[idx],
vm_boards[idx].irq_out_interval);
retval = usb_submit_urb(vm_boards[idx].irq_out_urb, GFP_KERNEL);
if (retval)
DBGCM("comedi#: vmk80xx: device reset failed (err #%d)\n",
retval);
else
DBGCM("comedi#: vmk80xx: device reset success\n");
usb_set_intfdata(itf, &vm_boards[idx]);
/* Show some debugging messages if required */
DBGCM("comedi#: vmk80xx: [<-] ep addr 0x%02x size %d interval %d\n",
vm_boards[idx].irq_in_endpoint,
vm_boards[idx].irq_in_endpoint_size,
vm_boards[idx].irq_in_interval);
DBGCM("comedi#: vmk80xx: [->] ep addr 0x%02x size %d interval %d\n",
vm_boards[idx].irq_out_endpoint,
vm_boards[idx].irq_out_endpoint_size,
vm_boards[idx].irq_out_interval);
vm_boards[idx].id = idx;
/* Let the user know that the device is now attached */
printk("comedi#: vmk80xx: K8055 board #%d now attached\n",
vm_boards[idx].id);
/* We have an attached velleman board */
vm_boards[idx].probed = 1;
mutex_unlock(&glb_mutex);
return retval;
error:
vm_delete(&vm_boards[idx]);
mutex_unlock(&glb_mutex);
return retval;
}
static void vm_disconnect(struct usb_interface *intf)
{
struct vmk80xx_usb *vm;
DBGVM("comedi#: vmk80xx: %s\n", __func__);
vm = (struct vmk80xx_usb *)usb_get_intfdata(intf);
if (!vm) {
printk("comedi#: vmk80xx: %s - vm is NULL\n", __func__);
return; /* -EFAULT */
}
mutex_lock(&glb_mutex);
/* Twill be needed if the driver supports more than one board */
down(&vm->limit_sem);
vm->probed = 0; /* we have -1 attached boards */
usb_set_intfdata(vm->intf, NULL);
vm_delete(vm); /* tidy up */
/* Twill be needed if the driver supports more than one board */
up(&vm->limit_sem);
mutex_unlock(&glb_mutex);
printk("comedi#: vmk80xx: Velleman board #%d now detached\n",
vm->id);
}
/* ---------------------------------------------------------------------------
* Register/Deregister this driver with/from the usb subsystem and the comedi.
--------------------------------------------------------------------------- */
static struct usb_driver vm_driver = {
#ifdef COMEDI_HAVE_USB_DRIVER_OWNER
.owner = THIS_MODULE,
#endif
.name = "vmk80xx",
.probe = vm_probe,
.disconnect = vm_disconnect,
.id_table = vm_id_table,
};
static comedi_driver driver_vm = {
.module = THIS_MODULE,
.driver_name = "vmk80xx",
.attach = vm_attach,
.detach = vm_detach,
};
static int __init vm_init(void)
{
int retval, idx;
printk("vmk80xx: version " VMK80XX_MODULE_VERSION " -"
" Manuel Gebele <forensixs@gmx.de>\n");
for (idx = 0; idx < VMK8055_MAX_BOARDS; idx++) {
memset(&vm_boards[idx], 0x00, sizeof(vm_boards[idx]));
init_MUTEX(&vm_boards[idx].limit_sem);
init_waitqueue_head(&vm_boards[idx].read_wait);
init_waitqueue_head(&vm_boards[idx].write_wait);
}
/* Register with the usb subsystem */
retval = usb_register(&vm_driver);
if (retval) {
err("vmk80xx: usb subsystem registration failed (err #%d)\n",
retval);
return retval;
}
/* Register with the comedi core */
retval = comedi_driver_register(&driver_vm);
if (retval) {
err("vmk80xx: comedi core registration failed (err #%d)\n",
retval);
usb_deregister(&vm_driver);
}
return retval;
}
static void __exit vm_exit(void)
{
comedi_driver_unregister(&driver_vm);
usb_deregister(&vm_driver);
}
module_init(vm_init);
module_exit(vm_exit);
