/* PCI Access Library
*
* COPYRIGHT (c) 2010 Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <pci.h>
#include <pci/access.h>
/* Access Routines valid after a PCI-Access-Driver has registered */
struct pci_access_drv pci_access_ops;
/* Read a 8-bit register over configuration space */
int pci_cfg_r8(pci_dev_t dev, int ofs, uint8_t *data)
{
return pci_access_ops.cfg.read8(dev, ofs, data);
}
/* Read a 16-bit register over configuration space */
int pci_cfg_r16(pci_dev_t dev, int ofs, uint16_t *data)
{
return pci_access_ops.cfg.read16(dev, ofs, data);
}
/* Read a 32-bit register over configuration space */
int pci_cfg_r32(pci_dev_t dev, int ofs, uint32_t *data)
{
return pci_access_ops.cfg.read32(dev, ofs, data);
}
/* Write a 8-bit register over configuration space */
int pci_cfg_w8(pci_dev_t dev, int ofs, uint8_t data)
{
return pci_access_ops.cfg.write8(dev, ofs, data);
}
/* Write a 16-bit register over configuration space */
int pci_cfg_w16(pci_dev_t dev, int ofs, uint16_t data)
{
return pci_access_ops.cfg.write16(dev, ofs, data);
}
/* Write a 32-bit register over configuration space */
int pci_cfg_w32(pci_dev_t dev, int ofs, uint32_t data)
{
return pci_access_ops.cfg.write32(dev, ofs, data);
}
void pci_modify_cmdsts(pci_dev_t dev, uint32_t mask, uint32_t val)
{
uint32_t data;
pci_cfg_r32(dev, PCIR_COMMAND, &data);
data &= ~mask;
data |= val;
pci_cfg_w32(dev, PCIR_COMMAND, data);
}
/* Register a driver for handling access to PCI */
int pci_access_drv_register(struct pci_access_drv *drv)
{
if (pci_access_ops.cfg.read8)
return -1; /* Already registered a driver.. */
pci_access_ops = *drv;
return 0;
}
