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