From 902add47dec8379e36e03d41d7f9877855514ccd Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Thu, 23 May 2013 12:48:41 -0700 Subject: [PATCH] staging: comedi: usbduxsigma: tidy up usbduxsigma_usb_probe() For aesthetic reasons, rename some of the variables to the "norm" used in comedi drivers. Use a local variable for the pointer to the private data instead of accessing the static array directly. Also use a local variable to setup the urbs. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/usbduxsigma.c | 228 ++++++++++++--------------- 1 file changed, 101 insertions(+), 127 deletions(-) diff --git a/drivers/staging/comedi/drivers/usbduxsigma.c b/drivers/staging/comedi/drivers/usbduxsigma.c index a5a2ac3..d719a2c 100644 --- a/drivers/staging/comedi/drivers/usbduxsigma.c +++ b/drivers/staging/comedi/drivers/usbduxsigma.c @@ -1955,224 +1955,198 @@ static struct comedi_driver usbduxsigma_driver = { .detach = usbduxsigma_detach, }; -static int usbduxsigma_usb_probe(struct usb_interface *uinterf, +static int usbduxsigma_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { - struct usb_device *udev = interface_to_usbdev(uinterf); - struct device *dev = &uinterf->dev; + struct usb_device *usb = interface_to_usbdev(intf); + struct device *dev = &intf->dev; + struct usbduxsigma_private *devpriv = NULL; + struct urb *urb; int i; - int index; down(&start_stop_sem); - /* look for a free place in the usbdux array */ - index = -1; for (i = 0; i < NUMUSBDUX; i++) { - if (!(usbduxsub[i].probed)) { - index = i; + if (!usbduxsub[i].probed) { + devpriv = &usbduxsub[i]; break; } } - /* no more space */ - if (index == -1) { + if (!devpriv) { dev_err(dev, "Too many usbduxsigma-devices connected.\n"); up(&start_stop_sem); return -EMFILE; } - sema_init(&(usbduxsub[index].sem), 1); - /* save a pointer to the usb device */ - usbduxsub[index].usbdev = udev; - - /* save the interface itself */ - usbduxsub[index].interface = uinterf; - /* get the interface number from the interface */ - usbduxsub[index].ifnum = uinterf->altsetting->desc.bInterfaceNumber; - /* hand the private data over to the usb subsystem */ - /* will be needed for disconnect */ - usb_set_intfdata(uinterf, &(usbduxsub[index])); + sema_init(&devpriv->sem, 1); + devpriv->usbdev = usb; + devpriv->interface = intf; + devpriv->ifnum = intf->altsetting->desc.bInterfaceNumber; + usb_set_intfdata(intf, devpriv); /* test if it is high speed (USB 2.0) */ - usbduxsub[index].high_speed = - (usbduxsub[index].usbdev->speed == USB_SPEED_HIGH); + devpriv->high_speed = (usb->speed == USB_SPEED_HIGH); /* create space for the commands of the DA converter */ - usbduxsub[index].dac_commands = kzalloc(NUMOUTCHANNELS, GFP_KERNEL); - if (!usbduxsub[index].dac_commands) { - tidy_up(&(usbduxsub[index])); + devpriv->dac_commands = kzalloc(NUMOUTCHANNELS, GFP_KERNEL); + if (!devpriv->dac_commands) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } /* create space for the commands going to the usb device */ - usbduxsub[index].dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL); - if (!usbduxsub[index].dux_commands) { - tidy_up(&(usbduxsub[index])); + devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL); + if (!devpriv->dux_commands) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } /* create space for the in buffer and set it to zero */ - usbduxsub[index].inBuffer = kzalloc(SIZEINBUF, GFP_KERNEL); - if (!(usbduxsub[index].inBuffer)) { - tidy_up(&(usbduxsub[index])); + devpriv->inBuffer = kzalloc(SIZEINBUF, GFP_KERNEL); + if (!devpriv->inBuffer) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } /* create space of the instruction buffer */ - usbduxsub[index].insnBuffer = kzalloc(SIZEINSNBUF, GFP_KERNEL); - if (!(usbduxsub[index].insnBuffer)) { - tidy_up(&(usbduxsub[index])); + devpriv->insnBuffer = kzalloc(SIZEINSNBUF, GFP_KERNEL); + if (!devpriv->insnBuffer) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } /* create space for the outbuffer */ - usbduxsub[index].outBuffer = kzalloc(SIZEOUTBUF, GFP_KERNEL); - if (!(usbduxsub[index].outBuffer)) { - tidy_up(&(usbduxsub[index])); + devpriv->outBuffer = kzalloc(SIZEOUTBUF, GFP_KERNEL); + if (!devpriv->outBuffer) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } /* setting to alternate setting 3: enabling iso ep and bulk ep. */ - i = usb_set_interface(usbduxsub[index].usbdev, - usbduxsub[index].ifnum, 3); + i = usb_set_interface(usb, devpriv->ifnum, 3); if (i < 0) { - dev_err(dev, "comedi_: usbduxsigma%d: " - "could not set alternate setting 3 in high speed.\n", - index); - tidy_up(&(usbduxsub[index])); + dev_err(dev, + "could not set alternate setting 3 in high speed\n"); + tidy_up(devpriv); up(&start_stop_sem); return -ENODEV; } - if (usbduxsub[index].high_speed) - usbduxsub[index].numOfInBuffers = NUMOFINBUFFERSHIGH; + if (devpriv->high_speed) + devpriv->numOfInBuffers = NUMOFINBUFFERSHIGH; else - usbduxsub[index].numOfInBuffers = NUMOFINBUFFERSFULL; + devpriv->numOfInBuffers = NUMOFINBUFFERSFULL; - usbduxsub[index].urbIn = kcalloc(usbduxsub[index].numOfInBuffers, - sizeof(struct urb *), - GFP_KERNEL); - if (!(usbduxsub[index].urbIn)) { - tidy_up(&(usbduxsub[index])); + devpriv->urbIn = kcalloc(devpriv->numOfInBuffers, sizeof(*urb), + GFP_KERNEL); + if (!devpriv->urbIn) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - for (i = 0; i < usbduxsub[index].numOfInBuffers; i++) { + for (i = 0; i < devpriv->numOfInBuffers; i++) { /* one frame: 1ms */ - usbduxsub[index].urbIn[i] = usb_alloc_urb(1, GFP_KERNEL); - if (usbduxsub[index].urbIn[i] == NULL) { - dev_err(dev, "comedi_: usbduxsigma%d: " - "Could not alloc. urb(%d)\n", index, i); - tidy_up(&(usbduxsub[index])); + urb = usb_alloc_urb(1, GFP_KERNEL); + if (!urb) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - usbduxsub[index].urbIn[i]->dev = usbduxsub[index].usbdev; + devpriv->urbIn[i] = urb; + urb->dev = usb; /* will be filled later with a pointer to the comedi-device */ /* and ONLY then the urb should be submitted */ - usbduxsub[index].urbIn[i]->context = NULL; - usbduxsub[index].urbIn[i]->pipe = - usb_rcvisocpipe(usbduxsub[index].usbdev, ISOINEP); - usbduxsub[index].urbIn[i]->transfer_flags = URB_ISO_ASAP; - usbduxsub[index].urbIn[i]->transfer_buffer = - kzalloc(SIZEINBUF, GFP_KERNEL); - if (!(usbduxsub[index].urbIn[i]->transfer_buffer)) { - tidy_up(&(usbduxsub[index])); + urb->context = NULL; + urb->pipe = usb_rcvisocpipe(usb, ISOINEP); + urb->transfer_flags = URB_ISO_ASAP; + urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL); + if (!urb->transfer_buffer) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - usbduxsub[index].urbIn[i]->complete = usbduxsub_ai_IsocIrq; - usbduxsub[index].urbIn[i]->number_of_packets = 1; - usbduxsub[index].urbIn[i]->transfer_buffer_length = SIZEINBUF; - usbduxsub[index].urbIn[i]->iso_frame_desc[0].offset = 0; - usbduxsub[index].urbIn[i]->iso_frame_desc[0].length = - SIZEINBUF; + urb->complete = usbduxsub_ai_IsocIrq; + urb->number_of_packets = 1; + urb->transfer_buffer_length = SIZEINBUF; + urb->iso_frame_desc[0].offset = 0; + urb->iso_frame_desc[0].length = SIZEINBUF; } /* out */ - if (usbduxsub[index].high_speed) - usbduxsub[index].numOfOutBuffers = NUMOFOUTBUFFERSHIGH; + if (devpriv->high_speed) + devpriv->numOfOutBuffers = NUMOFOUTBUFFERSHIGH; else - usbduxsub[index].numOfOutBuffers = NUMOFOUTBUFFERSFULL; + devpriv->numOfOutBuffers = NUMOFOUTBUFFERSFULL; - usbduxsub[index].urbOut = kcalloc(usbduxsub[index].numOfOutBuffers, - sizeof(struct urb *), GFP_KERNEL); - if (!(usbduxsub[index].urbOut)) { - tidy_up(&(usbduxsub[index])); + devpriv->urbOut = kcalloc(devpriv->numOfOutBuffers, sizeof(*urb), + GFP_KERNEL); + if (!devpriv->urbOut) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - for (i = 0; i < usbduxsub[index].numOfOutBuffers; i++) { + for (i = 0; i < devpriv->numOfOutBuffers; i++) { /* one frame: 1ms */ - usbduxsub[index].urbOut[i] = usb_alloc_urb(1, GFP_KERNEL); - if (usbduxsub[index].urbOut[i] == NULL) { - dev_err(dev, "comedi_: usbduxsigma%d: " - "Could not alloc. urb(%d)\n", index, i); - tidy_up(&(usbduxsub[index])); + urb = usb_alloc_urb(1, GFP_KERNEL); + if (!urb) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - usbduxsub[index].urbOut[i]->dev = usbduxsub[index].usbdev; + devpriv->urbOut[i] = urb; + urb->dev = usb; /* will be filled later with a pointer to the comedi-device */ /* and ONLY then the urb should be submitted */ - usbduxsub[index].urbOut[i]->context = NULL; - usbduxsub[index].urbOut[i]->pipe = - usb_sndisocpipe(usbduxsub[index].usbdev, ISOOUTEP); - usbduxsub[index].urbOut[i]->transfer_flags = URB_ISO_ASAP; - usbduxsub[index].urbOut[i]->transfer_buffer = - kzalloc(SIZEOUTBUF, GFP_KERNEL); - if (!(usbduxsub[index].urbOut[i]->transfer_buffer)) { - tidy_up(&(usbduxsub[index])); + urb->context = NULL; + urb->pipe = usb_sndisocpipe(usb, ISOOUTEP); + urb->transfer_flags = URB_ISO_ASAP; + urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL); + if (!urb->transfer_buffer) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - usbduxsub[index].urbOut[i]->complete = usbduxsub_ao_IsocIrq; - usbduxsub[index].urbOut[i]->number_of_packets = 1; - usbduxsub[index].urbOut[i]->transfer_buffer_length = - SIZEOUTBUF; - usbduxsub[index].urbOut[i]->iso_frame_desc[0].offset = 0; - usbduxsub[index].urbOut[i]->iso_frame_desc[0].length = - SIZEOUTBUF; - if (usbduxsub[index].high_speed) { - /* uframes */ - usbduxsub[index].urbOut[i]->interval = 8; - } else { - /* frames */ - usbduxsub[index].urbOut[i]->interval = 1; - } + urb->complete = usbduxsub_ao_IsocIrq; + 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 (usbduxsub[index].high_speed) { + if (devpriv->high_speed) { /* max bulk ep size in high speed */ - usbduxsub[index].sizePwmBuf = 512; - usbduxsub[index].urbPwm = usb_alloc_urb(0, GFP_KERNEL); - if (usbduxsub[index].urbPwm == NULL) { - dev_err(dev, "comedi_: usbduxsigma%d: " - "Could not alloc. pwm urb\n", index); - tidy_up(&(usbduxsub[index])); + devpriv->sizePwmBuf = 512; + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } - usbduxsub[index].urbPwm->transfer_buffer = - kzalloc(usbduxsub[index].sizePwmBuf, GFP_KERNEL); - if (!(usbduxsub[index].urbPwm->transfer_buffer)) { - tidy_up(&(usbduxsub[index])); + devpriv->urbPwm = urb; + urb->transfer_buffer = kzalloc(devpriv->sizePwmBuf, GFP_KERNEL); + if (!urb->transfer_buffer) { + tidy_up(devpriv); up(&start_stop_sem); return -ENOMEM; } } else { - usbduxsub[index].urbPwm = NULL; - usbduxsub[index].sizePwmBuf = 0; + devpriv->urbPwm = NULL; + devpriv->sizePwmBuf = 0; } - usbduxsub[index].ai_cmd_running = 0; - usbduxsub[index].ao_cmd_running = 0; - usbduxsub[index].pwm_cmd_running = 0; + devpriv->ai_cmd_running = 0; + devpriv->ao_cmd_running = 0; + devpriv->pwm_cmd_running = 0; /* we've reached the bottom of the function */ - usbduxsub[index].probed = 1; + devpriv->probed = 1; up(&start_stop_sem); - return comedi_usb_auto_config(uinterf, &usbduxsigma_driver, 0);; + return comedi_usb_auto_config(intf, &usbduxsigma_driver, 0);; } static void usbduxsigma_usb_disconnect(struct usb_interface *intf) -- 2.7.4