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Date: Fri, 4 May 2012 16:49:45 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<fmhess@...rs.sourceforge.net>, <gregkh@...uxfoundation.org>
Subject: [PATCH] staging: comedi: refactor dt3000 driver to remove forward declarations
Move the module_init/module_exit routines and the associated
struct comedi_driver and other variables to the end of the source.
This is more typical of how other drivers are written.
Also, refactor a couple of the pci helper functions used during the
attach. The removes the need for the forward declarations.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Mori Hess <fmhess@...rs.sourceforge.net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
diff --git a/drivers/staging/comedi/drivers/dt3000.c b/drivers/staging/comedi/drivers/dt3000.c
index d44c89d..932eac9 100644
--- a/drivers/staging/comedi/drivers/dt3000.c
+++ b/drivers/staging/comedi/drivers/dt3000.c
@@ -164,19 +164,6 @@ static const struct dt3k_boardtype dt3k_boardtypes[] = {
#define n_dt3k_boards sizeof(dt3k_boardtypes)/sizeof(struct dt3k_boardtype)
#define this_board ((const struct dt3k_boardtype *)dev->board_ptr)
-static DEFINE_PCI_DEVICE_TABLE(dt3k_pci_table) = {
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0022) },
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0027) },
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0023) },
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0024) },
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0028) },
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0025) },
- { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0026) },
- { 0 }
-};
-
-MODULE_DEVICE_TABLE(pci, dt3k_pci_table);
-
#define DT3000_SIZE (4*0x1000)
/* dual-ported RAM location definitions */
@@ -276,54 +263,6 @@ struct dt3k_private {
#define devpriv ((struct dt3k_private *)dev->private)
-static int dt3000_attach(struct comedi_device *dev,
- struct comedi_devconfig *it);
-static int dt3000_detach(struct comedi_device *dev);
-static struct comedi_driver driver_dt3000 = {
- .driver_name = "dt3000",
- .module = THIS_MODULE,
- .attach = dt3000_attach,
- .detach = dt3000_detach,
-};
-
-static int __devinit driver_dt3000_pci_probe(struct pci_dev *dev,
- const struct pci_device_id *ent)
-{
- return comedi_pci_auto_config(dev, &driver_dt3000);
-}
-
-static void __devexit driver_dt3000_pci_remove(struct pci_dev *dev)
-{
- comedi_pci_auto_unconfig(dev);
-}
-
-static struct pci_driver driver_dt3000_pci_driver = {
- .id_table = dt3k_pci_table,
- .probe = &driver_dt3000_pci_probe,
- .remove = __devexit_p(&driver_dt3000_pci_remove)
-};
-
-static int __init driver_dt3000_init_module(void)
-{
- int retval;
-
- retval = comedi_driver_register(&driver_dt3000);
- if (retval < 0)
- return retval;
-
- driver_dt3000_pci_driver.name = (char *)driver_dt3000.driver_name;
- return pci_register_driver(&driver_dt3000_pci_driver);
-}
-
-static void __exit driver_dt3000_cleanup_module(void)
-{
- pci_unregister_driver(&driver_dt3000_pci_driver);
- comedi_driver_unregister(&driver_dt3000);
-}
-
-module_init(driver_dt3000_init_module);
-module_exit(driver_dt3000_cleanup_module);
-
static void dt3k_ai_empty_fifo(struct comedi_device *dev,
struct comedi_subdevice *s);
static int dt3k_ns_to_timer(unsigned int timer_base, unsigned int *arg,
@@ -841,7 +780,77 @@ static int dt3k_mem_insn_read(struct comedi_device *dev,
return i;
}
-static int dt_pci_probe(struct comedi_device *dev, int bus, int slot);
+static int setup_pci(struct comedi_device *dev)
+{
+ resource_size_t addr;
+ int ret;
+
+ ret = comedi_pci_enable(devpriv->pci_dev, "dt3000");
+ if (ret < 0)
+ return ret;
+
+ addr = pci_resource_start(devpriv->pci_dev, 0);
+ devpriv->phys_addr = addr;
+ devpriv->io_addr = ioremap(devpriv->phys_addr, DT3000_SIZE);
+ if (!devpriv->io_addr)
+ return -ENOMEM;
+#if DEBUG
+ printk("0x%08llx mapped to %p, ",
+ (unsigned long long)devpriv->phys_addr, devpriv->io_addr);
+#endif
+
+ return 0;
+}
+
+static struct pci_dev *dt_pci_find_device(struct pci_dev *from, int *board)
+{
+ int i;
+
+ for (from = pci_get_device(PCI_VENDOR_ID_DT, PCI_ANY_ID, from);
+ from != NULL;
+ from = pci_get_device(PCI_VENDOR_ID_DT, PCI_ANY_ID, from)) {
+ for (i = 0; i < n_dt3k_boards; i++) {
+ if (from->device == dt3k_boardtypes[i].device_id) {
+ *board = i;
+ return from;
+ }
+ }
+ printk
+ ("unknown Data Translation PCI device found with device_id=0x%04x\n",
+ from->device);
+ }
+ *board = -1;
+ return from;
+}
+
+static int dt_pci_probe(struct comedi_device *dev, int bus, int slot)
+{
+ int board;
+ int ret;
+ struct pci_dev *pcidev;
+
+ pcidev = NULL;
+ while ((pcidev = dt_pci_find_device(pcidev, &board)) != NULL) {
+ if ((bus == 0 && slot == 0) ||
+ (pcidev->bus->number == bus &&
+ PCI_SLOT(pcidev->devfn) == slot)) {
+ break;
+ }
+ }
+ devpriv->pci_dev = pcidev;
+
+ if (board >= 0)
+ dev->board_ptr = dt3k_boardtypes + board;
+
+ if (!devpriv->pci_dev)
+ return 0;
+
+ ret = setup_pci(dev);
+ if (ret < 0)
+ return ret;
+
+ return 1;
+}
static int dt3000_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
@@ -949,85 +958,65 @@ static int dt3000_detach(struct comedi_device *dev)
if (devpriv->io_addr)
iounmap(devpriv->io_addr);
}
- /* XXX */
return 0;
}
-static struct pci_dev *dt_pci_find_device(struct pci_dev *from, int *board);
-static int setup_pci(struct comedi_device *dev);
+static struct comedi_driver driver_dt3000 = {
+ .driver_name = "dt3000",
+ .module = THIS_MODULE,
+ .attach = dt3000_attach,
+ .detach = dt3000_detach,
+};
-static int dt_pci_probe(struct comedi_device *dev, int bus, int slot)
+static int __devinit driver_dt3000_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *ent)
{
- int board;
- int ret;
- struct pci_dev *pcidev;
-
- pcidev = NULL;
- while ((pcidev = dt_pci_find_device(pcidev, &board)) != NULL) {
- if ((bus == 0 && slot == 0) ||
- (pcidev->bus->number == bus &&
- PCI_SLOT(pcidev->devfn) == slot)) {
- break;
- }
- }
- devpriv->pci_dev = pcidev;
-
- if (board >= 0)
- dev->board_ptr = dt3k_boardtypes + board;
+ return comedi_pci_auto_config(dev, &driver_dt3000);
+}
- if (!devpriv->pci_dev)
- return 0;
+static void __devexit driver_dt3000_pci_remove(struct pci_dev *dev)
+{
+ comedi_pci_auto_unconfig(dev);
+}
- ret = setup_pci(dev);
- if (ret < 0)
- return ret;
+static DEFINE_PCI_DEVICE_TABLE(dt3k_pci_table) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0022) },
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0027) },
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0023) },
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0024) },
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0028) },
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0025) },
+ { PCI_DEVICE(PCI_VENDOR_ID_DT, 0x0026) },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, dt3k_pci_table);
- return 1;
-}
+static struct pci_driver driver_dt3000_pci_driver = {
+ .id_table = dt3k_pci_table,
+ .probe = driver_dt3000_pci_probe,
+ .remove = __devexit_p(driver_dt3000_pci_remove),
+};
-static int setup_pci(struct comedi_device *dev)
+static int __init driver_dt3000_init_module(void)
{
- resource_size_t addr;
- int ret;
-
- ret = comedi_pci_enable(devpriv->pci_dev, "dt3000");
- if (ret < 0)
- return ret;
+ int retval;
- addr = pci_resource_start(devpriv->pci_dev, 0);
- devpriv->phys_addr = addr;
- devpriv->io_addr = ioremap(devpriv->phys_addr, DT3000_SIZE);
- if (!devpriv->io_addr)
- return -ENOMEM;
-#if DEBUG
- printk("0x%08llx mapped to %p, ",
- (unsigned long long)devpriv->phys_addr, devpriv->io_addr);
-#endif
+ retval = comedi_driver_register(&driver_dt3000);
+ if (retval < 0)
+ return retval;
- return 0;
+ driver_dt3000_pci_driver.name = (char *)driver_dt3000.driver_name;
+ return pci_register_driver(&driver_dt3000_pci_driver);
}
+module_init(driver_dt3000_init_module);
-static struct pci_dev *dt_pci_find_device(struct pci_dev *from, int *board)
+static void __exit driver_dt3000_cleanup_module(void)
{
- int i;
-
- for (from = pci_get_device(PCI_VENDOR_ID_DT, PCI_ANY_ID, from);
- from != NULL;
- from = pci_get_device(PCI_VENDOR_ID_DT, PCI_ANY_ID, from)) {
- for (i = 0; i < n_dt3k_boards; i++) {
- if (from->device == dt3k_boardtypes[i].device_id) {
- *board = i;
- return from;
- }
- }
- printk
- ("unknown Data Translation PCI device found with device_id=0x%04x\n",
- from->device);
- }
- *board = -1;
- return from;
+ pci_unregister_driver(&driver_dt3000_pci_driver);
+ comedi_driver_unregister(&driver_dt3000);
}
+module_exit(driver_dt3000_cleanup_module);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
--
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