On Sat, Nov 15, 2014 at 9:18 AM, Simon Glass sjg@chromium.org wrote:
Some PCI functions cannot be auto-configured. Add a function to set up a fixed BAR which can be used in these situations. Also add a function to read the current address of a BAR.
Signed-off-by: Simon Glass sjg@chromium.org
Changes in v2:
- Rename functions to pci_read_bar32() and pci_write_bar32()
drivers/pci/pci.c | 24 +++++++++++++++++++++--- include/pci.h | 23 +++++++++++++++++++++++ 2 files changed, 44 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 60c333e..332df61 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -363,9 +363,27 @@ phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose, return phys_addr; }
-/*
- */
+void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
u32 addr_and_ctrl)+{
int bar;bar = PCI_BASE_ADDRESS_0 + barnum * 4;pci_hose_write_config_dword(hose, dev, bar, addr_and_ctrl);+}
+u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum) +{
u32 addr;int bar;bar = PCI_BASE_ADDRESS_0 + barnum * 4;pci_hose_read_config_dword(hose, dev, bar, &addr);if (addr & PCI_BASE_ADDRESS_SPACE_IO)return addr & PCI_BASE_ADDRESS_IO_MASK;elsereturn addr & PCI_BASE_ADDRESS_MEM_MASK;+}
int pci_hose_config_device(struct pci_controller *hose, pci_dev_t dev, diff --git a/include/pci.h b/include/pci.h index 2ff7365..ccda2c5 100644 --- a/include/pci.h +++ b/include/pci.h @@ -677,5 +677,28 @@ extern void pci_mpc824x_init (struct pci_controller *hose); extern void pci_mpc85xx_init (struct pci_controller *hose); #endif
+/**
- pci_write_bar32() - Write the address of a BAR including control bits
- This writes a raw address (with control bits) to a bar
- @hose: PCI hose to use
- @dev: PCI device to update
- @barnum: BAR number (0-5)
- @addr: BAR address with control bits
- */
+void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
u32 addr_and_ctrl);+/**
- pci_read_bar32() - read the address of a bar
- @hose: PCI hose to use
- @dev: PCI device to inspect
- @barnum: BAR number (0-5)
- @return address of the bar, masking out any control bits
- */
+u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum);
#endif /* __ASSEMBLY__ */
#endif /* _PCI_H */
Reviewed-by: Bin Meng bmeng.cn@gmail.com