--- /dev/null
+/*
+ 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);
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff