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#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#define PCI_VENDOR_ID_ILLEGAL_VENDOR 0xffff
#define PCI_DEVICE_ID_ILLEGAL_VENDOR_DEVICE 0x2342
struct vain_pci_info {
void __iomem *base;
struct pci_dev *pdev;
spinlock_t lock;
};
static struct pci_device_id vain_pci_ids[] __devinitdata = {
{PCI_VENDOR_ID_ILLEGAL_VENDOR, PCI_DEVICE_ID_ILLEGAL_VENDOR_DEVICE,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{0, }
};
MODULE_DEVICE_TABLE(pci, vain_pci_ids);
static int __devinit vain_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct vain_pci_info *info;
int ret;
dev_dbg(&pdev->dev, "Init, new card found\n");
info = kzalloc(sizeof(struct vain_pci_info), GFP_KERNEL);
if (unlikely(!info)) {
dev_err(&pdev->dev, "Could not allocate memory\n");
ret = -ENOMEM;
goto err_free;
}
info->pdev = pdev;
ret = pci_enable_device(pdev);
if (ret) {
dev_err(&pdev->dev, "Failed to enable PCI Device\n");
goto err_free;
}
ret = pci_request_regions(pdev, "vain_pci");
if (ret) {
dev_err(&pdev->dev, "I/O address 0x%04x already in use\n");
goto err_disable_device;
}
info->base = pci_ioremap_bar(pdev, 0);
if (!info->base) {
dev_err(&pdev->dev, "Unable to map card MMIO\n");
ret = -ENODEV;
goto err_rel_regs;
}
pci_set_drvdata(pdev, info);
return 0;
err_rel_regs:
pci_release_regions(pdev);
err_disable_device:
pci_disable_device(pdev);
err_free:
kfree(info);
return ret;
}
static void __devexit vain_pci_remove(struct pci_dev *pdev)
{
struct vain_pci_info *info = pci_get_drvdata(pdev);
iounmap(info->base);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
kfree (info);
}
static struct pci_driver vain_pci_driver = {
.name = "vain_pci",
.id_table = vain_pci_ids,
.probe = vain_pci_probe,
.remove = __devexit_p(vain_pci_remove),
};
static int vain_pci_init(void)
{
int err;
err = pci_register_driver(&vain_pci_driver);
if (!err)
printk(KERN_INFO "vain_pci_init: done\n");
return err;
}
static void vain_pci_exit(void)
{
pci_unregister_driver(&vain_pci_driver);
printk(KERN_INFO "vain_pci_exit: done\n");
}
module_init(vain_pci_init);
module_exit(vain_pci_exit);
MODULE_AUTHOR("Benedikt Spranger <b.spranger@linutronix.de>");
MODULE_DESCRIPTION("a more or less useless PCI module");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0815");
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