staging: comedi: usbduxfast: refactor init code
Refactor the usb driver probe/disconnect and comedi driver attach/ detach to follow the style of the other comedi driver types to improve maintainability. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
Greg Kroah-Hartman
parent
ab5455ae2d
commit
4c8ba916b2
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@ -49,11 +49,6 @@
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#include "comedi_fc.h"
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#include "../comedidev.h"
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#define DRIVER_VERSION "v1.0"
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#define DRIVER_AUTHOR "Bernd Porr, BerndPorr@f2s.com"
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#define DRIVER_DESC "USB-DUXfast, BerndPorr@f2s.com"
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#define BOARDNAME "usbduxfast"
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/*
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* timeout for the USB-transfer
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*/
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@ -196,8 +191,6 @@ static struct usbduxfastsub_s usbduxfastsub[NUMUSBDUXFAST];
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static DEFINE_SEMAPHORE(start_stop_sem);
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static struct comedi_driver usbduxfast_driver; /* see below for initializer */
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/*
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* bulk transfers to usbduxfast
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*/
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@ -1436,6 +1429,149 @@ static void tidy_up(struct usbduxfastsub_s *udfs)
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udfs->ai_cmd_running = 0;
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}
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/* common part of attach and attach_usb */
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static int usbduxfast_attach_common(struct comedi_device *dev,
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struct usbduxfastsub_s *udfs,
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void *aux_data, int aux_len)
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{
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int ret;
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struct comedi_subdevice *s;
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down(&udfs->sem);
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/* pointer back to the corresponding comedi device */
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udfs->comedidev = dev;
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/* trying to upload the firmware into the chip */
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if (aux_data)
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firmwareUpload(udfs, aux_data, aux_len);
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dev->board_name = "usbduxfast";
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ret = comedi_alloc_subdevices(dev, 1);
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if (ret) {
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up(&udfs->sem);
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return ret;
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}
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/* private structure is also simply the usb-structure */
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dev->private = udfs;
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/* the first subdevice is the A/D converter */
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s = dev->subdevices + SUBDEV_AD;
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/*
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* the URBs get the comedi subdevice which is responsible for reading
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* this is the subdevice which reads data
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*/
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dev->read_subdev = s;
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/* the subdevice receives as private structure the usb-structure */
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s->private = NULL;
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/* analog input */
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s->type = COMEDI_SUBD_AI;
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/* readable and ref is to ground */
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s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
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/* 16 channels */
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s->n_chan = 16;
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/* length of the channellist */
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s->len_chanlist = 16;
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/* callback functions */
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s->insn_read = usbduxfast_ai_insn_read;
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s->do_cmdtest = usbduxfast_ai_cmdtest;
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s->do_cmd = usbduxfast_ai_cmd;
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s->cancel = usbduxfast_ai_cancel;
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/* max value from the A/D converter (12bit+1 bit for overflow) */
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s->maxdata = 0x1000;
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/* range table to convert to physical units */
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s->range_table = &range_usbduxfast_ai_range;
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/* finally decide that it's attached */
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udfs->attached = 1;
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up(&udfs->sem);
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dev_info(dev->class_dev, "successfully attached to usbduxfast.\n");
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return 0;
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}
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/* is called for COMEDI_DEVCONFIG ioctl (when comedi_config is run) */
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static int usbduxfast_attach(struct comedi_device *dev,
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struct comedi_devconfig *it)
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{
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int ret;
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int index;
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int i;
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void *aux_data;
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int aux_len;
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dev->private = NULL;
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aux_data = comedi_aux_data(it->options, 0);
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aux_len = it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH];
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if (aux_data == NULL)
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aux_len = 0;
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else if (aux_len == 0)
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aux_data = NULL;
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down(&start_stop_sem);
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/*
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* find a valid device which has been detected by the
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* probe function of the usb
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*/
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index = -1;
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for (i = 0; i < NUMUSBDUXFAST; i++) {
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if (usbduxfastsub[i].probed && !usbduxfastsub[i].attached) {
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index = i;
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break;
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}
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}
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if (index < 0) {
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dev_err(dev->class_dev,
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"usbduxfast: error: attach failed, no usbduxfast devs connected to the usb bus.\n");
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ret = -ENODEV;
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} else
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ret = usbduxfast_attach_common(dev, &usbduxfastsub[index],
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aux_data, aux_len);
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up(&start_stop_sem);
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return ret;
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}
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/* is called from comedi_usb_auto_config() */
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static int usbduxfast_attach_usb(struct comedi_device *dev,
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struct usb_interface *uinterf)
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{
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int ret;
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struct usbduxfastsub_s *udfs;
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dev->private = NULL;
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down(&start_stop_sem);
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udfs = usb_get_intfdata(uinterf);
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if (!udfs || !udfs->probed) {
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dev_err(dev->class_dev,
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"usbduxfast: error: attach_usb failed, not connected\n");
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ret = -ENODEV;
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} else if (udfs->attached) {
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dev_err(dev->class_dev,
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"usbduxfast: error: attach_usb failed, already attached\n");
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ret = -ENODEV;
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} else
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ret = usbduxfast_attach_common(dev, udfs, NULL, 0);
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up(&start_stop_sem);
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return ret;
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}
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static void usbduxfast_detach(struct comedi_device *dev)
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{
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struct usbduxfastsub_s *usb = dev->private;
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if (usb) {
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down(&usb->sem);
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down(&start_stop_sem);
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dev->private = NULL;
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usb->attached = 0;
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usb->comedidev = NULL;
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up(&start_stop_sem);
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up(&usb->sem);
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}
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}
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static struct comedi_driver usbduxfast_driver = {
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.driver_name = "usbduxfast",
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.module = THIS_MODULE,
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.attach = usbduxfast_attach,
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.detach = usbduxfast_detach,
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.attach_usb = usbduxfast_attach_usb,
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};
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static void usbduxfast_firmware_request_complete_handler(const struct firmware
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*fw, void *context)
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{
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@ -1463,11 +1599,8 @@ static void usbduxfast_firmware_request_complete_handler(const struct firmware
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release_firmware(fw);
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}
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/*
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* allocate memory for the urbs and initialise them
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*/
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static int usbduxfastsub_probe(struct usb_interface *uinterf,
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const struct usb_device_id *id)
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static int usbduxfast_usb_probe(struct usb_interface *uinterf,
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const struct usb_device_id *id)
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{
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struct usb_device *udev = interface_to_usbdev(uinterf);
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int i;
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@ -1590,7 +1723,7 @@ static int usbduxfastsub_probe(struct usb_interface *uinterf,
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return 0;
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}
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static void usbduxfastsub_disconnect(struct usb_interface *intf)
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static void usbduxfast_usb_disconnect(struct usb_interface *intf)
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{
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struct usbduxfastsub_s *udfs = usb_get_intfdata(intf);
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struct usb_device *udev = interface_to_usbdev(intf);
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@ -1619,175 +1752,25 @@ static void usbduxfastsub_disconnect(struct usb_interface *intf)
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#endif
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}
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/* common part of attach and attach_usb */
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static int usbduxfast_attach_common(struct comedi_device *dev,
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struct usbduxfastsub_s *udfs,
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void *aux_data, int aux_len)
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{
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int ret;
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struct comedi_subdevice *s;
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down(&udfs->sem);
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/* pointer back to the corresponding comedi device */
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udfs->comedidev = dev;
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/* trying to upload the firmware into the chip */
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if (aux_data)
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firmwareUpload(udfs, aux_data, aux_len);
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dev->board_name = BOARDNAME;
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ret = comedi_alloc_subdevices(dev, 1);
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if (ret) {
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up(&udfs->sem);
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return ret;
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}
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/* private structure is also simply the usb-structure */
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dev->private = udfs;
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/* the first subdevice is the A/D converter */
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s = dev->subdevices + SUBDEV_AD;
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/*
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* the URBs get the comedi subdevice which is responsible for reading
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* this is the subdevice which reads data
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*/
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dev->read_subdev = s;
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/* the subdevice receives as private structure the usb-structure */
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s->private = NULL;
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/* analog input */
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s->type = COMEDI_SUBD_AI;
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/* readable and ref is to ground */
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s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
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/* 16 channels */
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s->n_chan = 16;
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/* length of the channellist */
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s->len_chanlist = 16;
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/* callback functions */
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s->insn_read = usbduxfast_ai_insn_read;
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s->do_cmdtest = usbduxfast_ai_cmdtest;
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s->do_cmd = usbduxfast_ai_cmd;
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s->cancel = usbduxfast_ai_cancel;
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/* max value from the A/D converter (12bit+1 bit for overflow) */
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s->maxdata = 0x1000;
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/* range table to convert to physical units */
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s->range_table = &range_usbduxfast_ai_range;
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/* finally decide that it's attached */
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udfs->attached = 1;
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up(&udfs->sem);
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dev_info(dev->class_dev, "successfully attached to usbduxfast.\n");
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return 0;
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}
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/* is called for COMEDI_DEVCONFIG ioctl (when comedi_config is run) */
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static int usbduxfast_attach(struct comedi_device *dev,
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struct comedi_devconfig *it)
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{
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int ret;
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int index;
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int i;
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void *aux_data;
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int aux_len;
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dev->private = NULL;
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aux_data = comedi_aux_data(it->options, 0);
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aux_len = it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH];
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if (aux_data == NULL)
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aux_len = 0;
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else if (aux_len == 0)
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aux_data = NULL;
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down(&start_stop_sem);
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/*
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* find a valid device which has been detected by the
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* probe function of the usb
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*/
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index = -1;
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for (i = 0; i < NUMUSBDUXFAST; i++) {
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if (usbduxfastsub[i].probed && !usbduxfastsub[i].attached) {
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index = i;
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break;
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}
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}
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if (index < 0) {
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dev_err(dev->class_dev,
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"usbduxfast: error: attach failed, no usbduxfast devs connected to the usb bus.\n");
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ret = -ENODEV;
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} else
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ret = usbduxfast_attach_common(dev, &usbduxfastsub[index],
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aux_data, aux_len);
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up(&start_stop_sem);
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return ret;
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}
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/* is called from comedi_usb_auto_config() */
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static int usbduxfast_attach_usb(struct comedi_device *dev,
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struct usb_interface *uinterf)
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{
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int ret;
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struct usbduxfastsub_s *udfs;
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dev->private = NULL;
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down(&start_stop_sem);
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udfs = usb_get_intfdata(uinterf);
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if (!udfs || !udfs->probed) {
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dev_err(dev->class_dev,
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"usbduxfast: error: attach_usb failed, not connected\n");
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ret = -ENODEV;
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} else if (udfs->attached) {
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dev_err(dev->class_dev,
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"usbduxfast: error: attach_usb failed, already attached\n");
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ret = -ENODEV;
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} else
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ret = usbduxfast_attach_common(dev, udfs, NULL, 0);
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up(&start_stop_sem);
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return ret;
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}
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static void usbduxfast_detach(struct comedi_device *dev)
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{
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struct usbduxfastsub_s *usb = dev->private;
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if (usb) {
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down(&usb->sem);
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down(&start_stop_sem);
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dev->private = NULL;
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usb->attached = 0;
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usb->comedidev = NULL;
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up(&start_stop_sem);
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up(&usb->sem);
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}
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}
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/*
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* main driver struct
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*/
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static struct comedi_driver usbduxfast_driver = {
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.driver_name = "usbduxfast",
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.module = THIS_MODULE,
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.attach = usbduxfast_attach,
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.detach = usbduxfast_detach,
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.attach_usb = usbduxfast_attach_usb,
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};
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/*
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* Table with the USB-devices: just now only testing IDs
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*/
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static const struct usb_device_id usbduxfastsub_table[] = {
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static const struct usb_device_id usbduxfast_usb_table[] = {
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/* { USB_DEVICE(0x4b4, 0x8613) }, testing */
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{USB_DEVICE(0x13d8, 0x0010)}, /* real ID */
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{USB_DEVICE(0x13d8, 0x0011)}, /* real ID */
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{} /* Terminating entry */
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{ USB_DEVICE(0x13d8, 0x0010) }, /* real ID */
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{ USB_DEVICE(0x13d8, 0x0011) }, /* real ID */
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{ }
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};
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MODULE_DEVICE_TABLE(usb, usbduxfastsub_table);
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MODULE_DEVICE_TABLE(usb, usbduxfast_usb_table);
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static struct usb_driver usbduxfast_usb_driver = {
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#ifdef COMEDI_HAVE_USB_DRIVER_OWNER
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.owner = THIS_MODULE,
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#endif
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.name = BOARDNAME,
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.probe = usbduxfastsub_probe,
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.disconnect = usbduxfastsub_disconnect,
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.id_table = usbduxfastsub_table,
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.name = "usbduxfast",
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.probe = usbduxfast_usb_probe,
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.disconnect = usbduxfast_usb_disconnect,
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.id_table = usbduxfast_usb_table,
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};
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module_comedi_usb_driver(usbduxfast_driver, usbduxfast_usb_driver);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com");
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MODULE_DESCRIPTION("USB-DUXfast, BerndPorr@f2s.com");
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MODULE_LICENSE("GPL");
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