include/ddekit/pci.h
#ifndef _DDEKIT_PCI_H
#define _DDEKIT_PCI_H
#include <ddekit/ddekit.h>

#include <ddekit/types.h>

/** \defgroup DDEKit_pci */

/** Our version of PCI_ANY_ID */
#define DDEKIT_PCI_ANY_ID    (~0)

/** Copy of L4IO_PCIDEV_RES */
#define DDEKIT_PCIDEV_RES	 12

struct ddekit_pci_dev;

/** PCI resource descriptor. Copied from generic_io. 
 *
 * XXX!
 */
typedef struct ddekit_pci_resource {
	unsigned long start;
	unsigned long end;
	unsigned long flags;
} ddekit_pci_res_t;

void ddekit_pci_init(void);

int ddekit_pci_get_device(int nr, int *bus, int *slot, int *func);

int ddekit_pci_read(int bus, int slot, int func, int pos, int len,
	ddekit_uint32_t *val);
int ddekit_pci_write(int bus, int slot, int func, int pos, int len,
	ddekit_uint32_t val);

/** Read byte from PCI config space.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus      bus ID
 * \param slot     slot #
 * \param func     function #
 * \param pos      offset in config space
 * \retval val     read value
 *
 * \return 0       success
 */
int ddekit_pci_readb(int bus, int slot, int func, int pos,
	ddekit_uint8_t *val);

/** Read word from PCI config space.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus      bus ID
 * \param slot     slot #
 * \param func     function #
 * \param pos      offset in config space
 * \retval val     read value
 *
 * \return 0       success
 */
int ddekit_pci_readw(int bus, int slot, int func, int pos,
	ddekit_uint16_t *val);

/** Read dword from PCI config space.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus      bus ID
 * \param slot     slot #
 * \param func     function #
 * \param pos      offset in config space
 * \retval val     read value
 *
 * \return 0       success
 */
int ddekit_pci_readl(int bus, int slot, int func, int pos,
	ddekit_uint32_t *val);

/** Write byte to PCI config space.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus      bus ID
 * \param slot     slot #
 * \param func     function #
 * \param pos      offset in config space
 * \retval val     value to write
 *
 * \return 0       success
 */
int ddekit_pci_writeb(int bus, int slot, int func, int pos,
	ddekit_uint8_t val);

/** Write word to PCI config space.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus      bus ID
 * \param slot     slot #
 * \param func     function #
 * \param pos      offset in config space
 * \retval val     value to write
 *
 * \return 0       success
 */
int ddekit_pci_writew(int bus, int slot, int func, int pos,
	ddekit_uint16_t val);

/** Write word to PCI config space.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus      bus ID
 * \param slot     slot #
 * \param func     function #
 * \param pos      offset in config space
 * \retval val     value to write
 *
 * \return 0       success
 */
int ddekit_pci_writel(int bus, int slot, int func, int pos,
	ddekit_uint32_t val);

/** Find a PCI device.
 *
 * \ingroup DDEKit_pci
 *
 * \param bus	pointer to bus number or \ref DDEKIT_PCI_ANY_ID
 * \param slot  pointer to slot number (devfn >> DEVFN_SLOTSHIFT) or \ref DDEKIT_PCI_ANY_ID
 * \param func  pointer to func number (devfc & DEVFN_FUNCMASK) or \ref DDEKIT_PCI_ANY_ID
 * \param start search device list only behind this device (excluding it!), NULL
 *              searches whole device list
 *
 * \retval bus      bus number
 * \retval slot     slot number
 * \retval func     function number
 *
 * \return device   a valid PCI device
 * \return NULL     if no device found
 */
struct ddekit_pci_dev * ddekit_pci_find_device(int *bus, int *slot, int
	*func, struct ddekit_pci_dev *start);

/** Enable PCI device
 * \ingroup DDEKit_pci
 */
int ddekit_pci_enable_device(struct ddekit_pci_dev *dev);

/** Disable PCI device
 * \ingroup DDEKit_pci
 */
int ddekit_pci_disable_device(struct ddekit_pci_dev *dev);

/** Enable bus-mastering for device.
 * \ingroup DDEKit_pci
 */
void ddekit_pci_set_master(struct ddekit_pci_dev *dev);

/** Get device vendor ID.
 * \ingroup DDEKit_pci
 */
unsigned short ddekit_pci_get_vendor(struct ddekit_pci_dev *dev);

/** Get device ID.
 * \ingroup DDEKit_pci
 */
unsigned short ddekit_pci_get_device_id(struct ddekit_pci_dev *dev);

/** Get device subvendor ID.
 * \ingroup DDEKit_pci
 */
unsigned short ddekit_pci_get_sub_vendor(struct ddekit_pci_dev *dev);

/** Get subdevice ID.
 * \ingroup DDEKit_pci
 */
unsigned short ddekit_pci_get_sub_device(struct ddekit_pci_dev *dev);

/** Get device class ID.
 * \ingroup DDEKit_pci
 */
unsigned ddekit_pci_get_dev_class(struct ddekit_pci_dev *dev);

/** Get device's IRQ number.
 * \ingroup DDEKit_pci
 */
unsigned long ddekit_pci_get_irq(struct ddekit_pci_dev *dev);

/** Get device name.
 * \ingroup DDEKit_pci
 */
char *ddekit_pci_get_name(struct ddekit_pci_dev *dev);

/** Get device's slot name.
 * \ingroup DDEKit_pci
 */
char *ddekit_pci_get_slot_name(struct ddekit_pci_dev *dev);

/** Get one of the device's resources.
 * \ingroup DDEKit_pci
 */
ddekit_pci_res_t *ddekit_pci_get_resource(struct ddekit_pci_dev *dev,
	unsigned int idx);

int ddekit_pci_irq_enable(int bus, int slot, int func, int pin, int
	*irq);

#endif 
