From 8b7d417c406bafacedeae6cc3e110b11640d14e5 Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Thu, 24 May 2012 17:27:18 +0100 Subject: [PATCH] staging: comedi: das08: Add attach_pci() hook Implement the attach_pci() hook. This is called by comedi_pci_auto_config() in preference to the old attach() hook and avoids searching for the probed PCI device. Factor out some common code used by both the attach() and attach_pci() hooks into a couple of new functions, das08_pci_attach_common() and das08_find_pci_board(). Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/das08.c | 118 +++++++++++++++++-------- 1 file changed, 79 insertions(+), 39 deletions(-) diff --git a/drivers/staging/comedi/drivers/das08.c b/drivers/staging/comedi/drivers/das08.c index 7324461e3f27..fa2784d65569 100644 --- a/drivers/staging/comedi/drivers/das08.c +++ b/drivers/staging/comedi/drivers/das08.c @@ -943,6 +943,75 @@ int das08_common_attach(struct comedi_device *dev, unsigned long iobase) } EXPORT_SYMBOL_GPL(das08_common_attach); +#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) +static int das08_pci_attach_common(struct comedi_device *dev, + struct pci_dev *pdev) +{ + unsigned long iobase; + unsigned long pci_iobase; + struct das08_private_struct *devpriv = dev->private; + + devpriv->pdev = pdev; + /* enable PCI device and reserve I/O spaces */ + if (comedi_pci_enable(pdev, dev->driver->driver_name)) { + dev_err(dev->class_dev, + "Error enabling PCI device and requesting regions\n"); + return -EIO; + } + /* read base addresses */ + pci_iobase = pci_resource_start(pdev, 1); + iobase = pci_resource_start(pdev, 2); + dev_info(dev->class_dev, "pcibase 0x%lx iobase 0x%lx\n", + pci_iobase, iobase); + devpriv->pci_iobase = pci_iobase; +#if 0 + /* We could enable pci-das08's interrupt here to make it possible + * to do timed input in this driver, but there is little point since + * conversions would have to be started by the interrupt handler + * so you might as well use comedi_rt_timer to emulate commands + */ + /* set source of interrupt trigger to counter2 output */ + outb(CNTRL_INTR | CNTRL_DIR, pci_iobase + CNTRL); + /* Enable local interrupt 1 and pci interrupt */ + outw(INTR1_ENABLE | PCI_INTR_ENABLE, pci_iobase + INTCSR); +#endif + return das08_common_attach(dev, iobase); +} +#endif + +#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) +static const struct das08_board_struct * +das08_find_pci_board(struct pci_dev *pdev) +{ + unsigned int i; + for (i = 0; i < ARRAY_SIZE(das08_boards); i++) + if (das08_boards[i].bustype == pci && + pdev->device == das08_boards[i].id) + return &das08_boards[i]; + return NULL; +} +#endif + +#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) +/* only called in the PCI probe path, via comedi_pci_auto_config() */ +static int __devinit das08_attach_pci(struct comedi_device *dev, + struct pci_dev *pdev) +{ + int ret; + + ret = alloc_private(dev, sizeof(struct das08_private_struct)); + if (ret < 0) + return ret; + dev_info(dev->class_dev, "attach pci %s\n", pci_name(pdev)); + dev->board_ptr = das08_find_pci_board(pdev); + if (dev->board_ptr == NULL) { + dev_err(dev->class_dev, "BUG! cannot determine board type!\n"); + return -EINVAL; + } + return das08_pci_attach_common(dev, pdev); +} +#endif + #if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) static struct pci_dev *das08_find_pci(struct comedi_device *dev, int bus, int slot) @@ -968,19 +1037,12 @@ static struct pci_dev *das08_find_pci(struct comedi_device *dev, continue; if (matchid == PCI_ANY_ID) { /* wildcard board matches any supported PCI board */ - unsigned int i; - for (i = 0; i < ARRAY_SIZE(das08_boards); i++) { - if (das08_boards[i].bustype != pci) - continue; - if (pdev->device == das08_boards[i].id) { - /* replace wildcard board_ptr */ - dev->board_ptr = &das08_boards[i]; - thisboard = comedi_board(dev); - break; - } - } - if (i == ARRAY_SIZE(das08_boards)) + const struct das08_board_struct *foundboard; + foundboard = das08_find_pci_board(pdev); + if (foundboard == NULL) continue; + /* replace wildcard board_ptr */ + dev->board_ptr = thisboard = foundboard; } else { /* match specific PCI board */ if (pdev->device != matchid) @@ -1018,36 +1080,11 @@ static int das08_attach(struct comedi_device *dev, struct comedi_devconfig *it) dev_info(dev->class_dev, "attach\n"); if (IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) && thisboard->bustype == pci) { - unsigned long pci_iobase = 0; struct pci_dev *pdev; pdev = das08_find_pci(dev, it->options[0], it->options[1]); if (pdev == NULL) return -EIO; - thisboard = comedi_board(dev); /* replaced wildcard board */ - devpriv->pdev = pdev; - /* enable PCI device and reserve I/O spaces */ - if (comedi_pci_enable(pdev, DRV_NAME)) { - dev_err(dev->class_dev, - "Error enabling PCI device and requesting regions\n"); - return -EIO; - } - /* read base addresses */ - pci_iobase = pci_resource_start(pdev, 1); - iobase = pci_resource_start(pdev, 2); - dev_info(dev->class_dev, "pcibase 0x%lx iobase 0x%lx\n", - pci_iobase, iobase); - devpriv->pci_iobase = pci_iobase; -#if 0 -/* We could enable to pci-das08's interrupt here to make it possible - * to do timed input in this driver, but there is little point since - * conversions would have to be started by the interrupt handler - * so you might as well use comedi_rt_timer to emulate commands - */ - /* set source of interrupt trigger to counter2 output */ - outb(CNTRL_INTR | CNTRL_DIR, pci_iobase + CNTRL); - /* Enable local interrupt 1 and pci interrupt */ - outw(INTR1_ENABLE | PCI_INTR_ENABLE, pci_iobase + INTCSR); -#endif + return das08_pci_attach_common(dev, pdev); } else if (IS_ENABLED(CONFIG_COMEDI_DAS08_ISA) && (thisboard->bustype == isa || thisboard->bustype == pc104)) { iobase = it->options[0]; @@ -1056,9 +1093,9 @@ static int das08_attach(struct comedi_device *dev, struct comedi_devconfig *it) dev_err(dev->class_dev, "I/O port conflict\n"); return -EIO; } + return das08_common_attach(dev, iobase); } else return -EIO; - return das08_common_attach(dev, iobase); } #endif /* DO_COMEDI_DRIVER_REGISTER */ @@ -1096,6 +1133,9 @@ static struct comedi_driver das08_driver = { .driver_name = DRV_NAME, .module = THIS_MODULE, .attach = das08_attach, +#if IS_ENABLED(CONFIG_COMEDI_DAS08_PCI) + .attach_pci = das08_attach_pci, +#endif .detach = das08_detach, .board_name = &das08_boards[0].name, .num_names = sizeof(das08_boards) / sizeof(struct das08_board_struct), -- 2.34.1