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#include "local.h"
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/init.h>
/* will include $(CONTRIB)/drivers/pci/pci.h */
#include "pci.h"
DECLARE_INITVAR(dde26_pci);
/** PCI device descriptor */
typedef struct l4dde_pci_dev {
struct list_head next; /**< chain info */
struct ddekit_pci_dev *ddekit_dev; /**< corresponding DDEKit descriptor */
struct pci_dev *linux_dev; /**< Linux descriptor */
} l4dde_pci_dev_t;
/*******************************************************************************************
** PCI data **
*******************************************************************************************/
/** List of Linux-DDEKit PCIDev mappings */
static LIST_HEAD(pcidev_mappings);
static int l4dde26_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
static int l4dde26_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
/** PCI operations for our virtual PCI bus */
static struct pci_ops dde_pcibus_ops = {
.read = l4dde26_pci_read,
.write = l4dde26_pci_write,
};
/*******************************************************************************************
** Read/write PCI config space. This is simply mapped to the DDEKit functions. **
*******************************************************************************************/
static int l4dde26_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val)
{
return ddekit_pci_read(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
}
static int l4dde26_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
{
return ddekit_pci_write(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
}
int pci_irq_enable(struct pci_dev *dev)
{
int irq = dev->irq;
int pin = 0;
int ret;
DEBUG_MSG("dev %p", dev);
if (!dev)
return -EINVAL;
pin = (int)dev->pin;
DEBUG_MSG("irq %d, pin %d", dev->irq, dev->pin);
if (!pin) {
dev_warn(&dev->dev,
"No interrupt pin configured for device %s\n",
pci_name(dev));
return 0;
}
pin--;
ret = ddekit_pci_irq_enable(dev->bus->number, PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn), pin, &irq);
if (ret) {
dev_warn(&dev->dev, "Interrupt enable failed for device %s (%d)\n",
pci_name(dev), ret);
return -1;
}
dev_info(&dev->dev, "PCI INT %c -> GSI %d -> IRQ %d\n",
'A' + pin, irq, dev->irq);
dev->irq = irq;
return 0;
}
int __pci_enable_device(struct pci_dev *dev)
{
WARN_UNIMPL;
return 0;
}
/**
* pci_enable_device - Initialize device before it's used by a driver.
*
* Initialize device before it's used by a driver. Ask low-level code
* to enable I/O and memory. Wake up the device if it was suspended.
* Beware, this function can fail.
*
* \param dev PCI device to be initialized
*
*/
int
pci_enable_device(struct pci_dev *dev)
{
CHECK_INITVAR(dde26_pci);
// WARN_UNIMPL;
return pci_irq_enable(dev);
}
/**
* pci_disable_device - Disable PCI device after use
*
* Signal to the system that the PCI device is not in use by the system
* anymore. This only involves disabling PCI bus-mastering, if active.
*
* \param dev PCI device to be disabled
*/
void pci_disable_device(struct pci_dev *dev)
{
CHECK_INITVAR(dde26_pci);
WARN_UNIMPL;
}
void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
{
//WARN_UNIMPL;
}
static unsigned int pcibios_max_latency = 255;
void pcibios_set_master(struct pci_dev *dev)
{
u8 lat;
pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
if (lat < 16)
lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency;
else if (lat > pcibios_max_latency)
lat = pcibios_max_latency;
else
return;
pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
}
int pci_create_sysfs_dev_files(struct pci_dev *pdev)
{
return 0;
}
unsigned int pcibios_assign_all_busses(void)
{
return 1;
}
void
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
WARN_UNIMPL;
}
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
#if 0
int err;
if ((err = pcibios_enable_resources(dev, mask)) < 0)
return err;
return pcibios_enable_irq(dev);
#endif
WARN_UNIMPL;
return -1;
}
/*******************************************************************************************
** Initialization function **
*******************************************************************************************/
/** Initialize DDELinux PCI subsystem.
*/
void __init l4dde26_init_pci(void)
{
ddekit_pci_init();
int nr;
char found[256] = { };
int bus, slot, func;
for (nr = 0; ; nr++) {
if (ddekit_pci_get_device(nr, &bus, &slot, &func) != 0)
break;
if (!found[bus]) {
struct pci_bus *pci_bus = pci_create_bus(NULL, bus, &dde_pcibus_ops, NULL);
Assert(pci_bus);
pci_do_scan_bus(pci_bus);
found[bus] = 1;
}
}
INITIALIZE_INITVAR(dde26_pci);
}
arch_initcall(l4dde26_init_pci);
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