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authorSimon Glass <sjg@chromium.org>2015-01-14 21:37:04 -0700
committerSimon Glass <sjg@chromium.org>2015-01-23 17:24:54 -0700
commit4a2708a097eacd7aa3d10ccf26a70a467fa69217 (patch)
treec2e07f6db9d83dbb45d2054343eff5172c34ae8f /drivers/pci/pci_auto.c
parent07570e709765e93f2b1e9506cfd8fa24455636b5 (diff)
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x86: Access the VGA ROM when needed
Add code to the generic pci_rom file to access the VGA ROM in PCI space when needed. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/pci/pci_auto.c')
-rw-r--r--drivers/pci/pci_auto.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c
index 44470fa..ed92857 100644
--- a/drivers/pci/pci_auto.c
+++ b/drivers/pci/pci_auto.c
@@ -11,7 +11,7 @@
*/
#include <common.h>
-
+#include <errno.h>
#include <pci.h>
#undef DEBUG
@@ -191,6 +191,32 @@ void pciauto_setup_device(struct pci_controller *hose,
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
}
+int pciauto_setup_rom(struct pci_controller *hose, pci_dev_t dev)
+{
+ pci_addr_t bar_value;
+ pci_size_t bar_size;
+ u32 bar_response;
+ u16 cmdstat = 0;
+
+ pci_hose_write_config_dword(hose, dev, PCI_ROM_ADDRESS, 0xfffffffe);
+ pci_hose_read_config_dword(hose, dev, PCI_ROM_ADDRESS, &bar_response);
+ if (!bar_response)
+ return -ENOENT;
+
+ bar_size = -(bar_response & ~1);
+ DEBUGF("PCI Autoconfig: ROM, size=%#x, ", bar_size);
+ if (pciauto_region_allocate(hose->pci_mem, bar_size, &bar_value) == 0) {
+ pci_hose_write_config_dword(hose, dev, PCI_ROM_ADDRESS,
+ bar_value);
+ }
+ DEBUGF("\n");
+ pci_hose_read_config_word(hose, dev, PCI_COMMAND, &cmdstat);
+ cmdstat |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+ pci_hose_write_config_word(hose, dev, PCI_COMMAND, cmdstat);
+
+ return 0;
+}
+
void pciauto_prescan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus)
{