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#include "pci.h"
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include "char.h"
#include "harddoom.h"
#include "util.h"
#include "harddoomdev.h"
#include "private_data.h"
void handle_pong_sync(struct doom_data *doom_data)
{
up(&doom_data->pong_sem);
}
irqreturn_t doom_irq(int irq, void *dev)
{
uint32_t interrupts;
struct doom_data *doom_data;
void __iomem *iomem;
doom_data = dev;
iomem = doom_data->iomem;
interrupts = ioread32(iomem + HARDDOOM_INTR) & ioread32(iomem + HARDDOOM_INTR_ENABLE);
iowrite32(interrupts, iomem + HARDDOOM_INTR);
if (!interrupts) {
return IRQ_NONE;
}
if (interrupts & HARDDOOM_INTR_PONG_SYNC) {
handle_pong_sync(doom_data);
interrupts &= ~HARDDOOM_INTR_PONG_SYNC;
}
if (interrupts & HARDDOOM_INTR_PONG_ASYNC) {
up(&doom_data->pong_async_sem);
iowrite32(HARDDOOM_INTR_MASK & (~HARDDOOM_INTR_PONG_ASYNC),
iomem + HARDDOOM_INTR_ENABLE);
}
return IRQ_HANDLED;
}
int init_pci(struct pci_dev *dev)
{
struct doom_data *doom_data;
int err = 0;
ORFAIL(pci_enable_device(dev), error_enable);
ORFAIL(pci_request_regions(dev, "harddoom"), error_regions);
doom_data = kmalloc(sizeof(*doom_data), GFP_KERNEL);
if (doom_data == NULL) {
err = -ENOMEM;
goto error_kmalloc;
}
pci_set_drvdata(dev, doom_data);
doom_data->iomem = pci_iomap(dev, 0, 0);
ORFAIL_NULL(doom_data->iomem, -ENOMEM, error_iomem);
doom_data->pci_device = &dev->dev;
pci_set_master(dev);
pci_set_dma_mask(dev, DMA_BIT_MASK(32));
pci_set_consistent_dma_mask(dev, DMA_BIT_MASK(32));
mutex_init(&doom_data->cmd_mutex);
mutex_init(&doom_data->ping_mutex);
sema_init(&doom_data->pong_sem, 0);
sema_init(&doom_data->pong_async_sem, 0);
doom_data->cmd_counter = 0;
ORFAIL(request_irq(dev->irq, doom_irq, IRQF_SHARED,
"doom", doom_data), error_irq);
return 0;
error_irq:
pci_clear_master(dev);
pci_iounmap(dev, doom_data->iomem);
error_iomem:
kfree(doom_data);
error_kmalloc:
pci_release_regions(dev);
error_regions:
pci_disable_device(dev);
error_enable:
return err;
}
void cleanup_pci(struct pci_dev *dev)
{
struct doom_data *doom_data;
doom_data = pci_get_drvdata(dev);
free_irq(dev->irq, doom_data);
pci_clear_master(dev);
pci_iounmap(dev, doom_data->iomem);
kfree(doom_data);
pci_release_regions(dev);
pci_disable_device(dev);
}
int doom_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int err = 0;
ORFAIL(init_pci(dev), error_pci);
start_dev(dev);
ORFAIL(new_doomdev(dev), error_doomdev);
return 0;
error_doomdev:
shutdown_dev(dev);
cleanup_pci(dev);
error_pci:
return err;
}
void doom_remove (struct pci_dev *dev)
{
struct doom_data *doom_data;
doom_data = pci_get_drvdata(dev);
destroy_doomdev(doom_data);
shutdown_dev(dev);
cleanup_pci(dev);
}
int doom_suspend (struct pci_dev *dev, pm_message_t state)
{
return 0;
}
int doom_suspend_late (struct pci_dev *dev, pm_message_t state)
{
return 0;
}
int doom_resume_early (struct pci_dev *dev)
{
return 0;
}
int doom_resume (struct pci_dev *dev)
{
return 0;
}
void doom_shutdown (struct pci_dev *dev)
{
}
struct pci_device_id device_ids[1] = {
{ PCI_DEVICE(HARDDOOM_VENDOR_ID, HARDDOOM_DEVICE_ID) }
};
struct pci_driver driver = {
.name = "harddoom",
.id_table = device_ids,
.probe = doom_probe,
.remove = doom_remove,
.suspend = doom_suspend,
.suspend_late = doom_suspend_late,
.resume_early = doom_resume_early,
.resume = doom_resume,
.shutdown = doom_shutdown
};
int pci_init(void)
{
return pci_register_driver(&driver);
}
void pci_cleanup(void)
{
pci_unregister_driver(&driver);
}
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