/**
* mei_probe - Device Initialization Routine
*
* @pdev: PCI device structure
* @ent: entry in kcs_pci_tbl
*
* returns 0 on success, <0 on failure.
*/
static int __devinit mei_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct mei_device *dev;
int err;
mutex_lock(&mei_mutex);
if (mei_device) {
err = -EEXIST;
goto end;
}
/* enable pci dev */
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR "mei: Failed to enable pci device.\n");
goto end;
}
/* set PCI host mastering */
pci_set_master(pdev);
/* pci request regions for mei driver */
err = pci_request_regions(pdev, mei_driver_name);
if (err) {
printk(KERN_ERR "mei: Failed to get pci regions.\n");
goto disable_device;
}
/* allocates and initializes the mei dev structure */
dev = init_mei_device(pdev);
if (!dev) {
err = -ENOMEM;
goto release_regions;
}
/* mapping IO device memory */
dev->mem_addr = pci_iomap(pdev, 0, 0);
if (!dev->mem_addr) {
printk(KERN_ERR "mei: mapping I/O device memory failure.\n");
err = -ENOMEM;
goto free_device;
}
/* request and enable interrupt */
err = request_threaded_irq(pdev->irq,
mei_interrupt_quick_handler,
mei_interrupt_thread_handler,
IRQF_SHARED, mei_driver_name, dev);
if (err) {
printk(KERN_ERR "mei: request_threaded_irq failure. irq = %d\n",
pdev->irq);
goto unmap_memory;
}
INIT_DELAYED_WORK(&dev->wd_work, mei_wd_timer);
if (mei_hw_init(dev)) {
printk(KERN_ERR "mei: Init hw failure.\n");
err = -ENODEV;
goto release_irq;
}
mei_device = pdev;
pci_set_drvdata(pdev, dev);
schedule_delayed_work(&dev->wd_work, HZ);
mutex_unlock(&mei_mutex);
pr_debug("mei: Driver initialization successful.\n");
return 0;
release_irq:
/* disable interrupts */
dev->host_hw_state = mei_hcsr_read(dev);
mei_disable_interrupts(dev);
flush_scheduled_work();
free_irq(pdev->irq, dev);
unmap_memory:
pci_iounmap(pdev, dev->mem_addr);
free_device:
kfree(dev);
release_regions:
pci_release_regions(pdev);
disable_device:
pci_disable_device(pdev);
end:
mutex_unlock(&mei_mutex);
printk(KERN_ERR "mei: Driver initialization failed.\n");
return err;
}
/**
* mei_probe - Device Initialization Routine
*
* @pdev: PCI device structure
* @ent: entry in kcs_pci_tbl
*
* returns 0 on success, <0 on failure.
*/
static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct mei_device *dev;
struct mei_me_hw *hw;
int err;
mutex_lock(&mei_mutex);
if (!mei_quirk_probe(pdev, ent)) {
err = -ENODEV;
goto end;
}
if (mei_pdev) {
err = -EEXIST;
goto end;
}
/* enable pci dev */
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "failed to enable pci device.\n");
goto end;
}
/* set PCI host mastering */
pci_set_master(pdev);
/* pci request regions for mei driver */
err = pci_request_regions(pdev, KBUILD_MODNAME);
if (err) {
dev_err(&pdev->dev, "failed to get pci regions.\n");
goto disable_device;
}
/* allocates and initializes the mei dev structure */
dev = mei_me_dev_init(pdev);
if (!dev) {
err = -ENOMEM;
goto release_regions;
}
hw = to_me_hw(dev);
/* mapping IO device memory */
hw->mem_addr = pci_iomap(pdev, 0, 0);
if (!hw->mem_addr) {
dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
err = -ENOMEM;
goto free_device;
}
pci_enable_msi(pdev);
/* request and enable interrupt */
if (pci_dev_msi_enabled(pdev))
err = request_threaded_irq(pdev->irq,
NULL,
mei_me_irq_thread_handler,
IRQF_ONESHOT, KBUILD_MODNAME, dev);
else
err = request_threaded_irq(pdev->irq,
mei_me_irq_quick_handler,
mei_me_irq_thread_handler,
IRQF_SHARED, KBUILD_MODNAME, dev);
if (err) {
dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
pdev->irq);
goto disable_msi;
}
if (mei_hw_init(dev)) {
dev_err(&pdev->dev, "init hw failure.\n");
err = -ENODEV;
goto release_irq;
}
err = mei_register(&pdev->dev);
if (err)
goto release_irq;
mei_pdev = pdev;
pci_set_drvdata(pdev, dev);
schedule_delayed_work(&dev->timer_work, HZ);
mutex_unlock(&mei_mutex);
pr_debug("initialization successful.\n");
return 0;
release_irq:
mei_disable_interrupts(dev);
flush_scheduled_work();
free_irq(pdev->irq, dev);
disable_msi:
pci_disable_msi(pdev);
pci_iounmap(pdev, hw->mem_addr);
free_device:
kfree(dev);
release_regions:
pci_release_regions(pdev);
disable_device:
pci_disable_device(pdev);
end:
mutex_unlock(&mei_mutex);
dev_err(&pdev->dev, "initialization failed.\n");
return err;
}
