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pci: Configure expansion ROM during auto config process 

Currently PCI expansion ROM address is assigned by a call to
pciauto_setup_rom() outside of the pci auto config process.
This does not work when expansion ROM is on a device behind
PCI bridge where bridge's memory limit register was already
programmed to a value that does not cover the newly assigned
expansion ROM address. To fix this, we should configure the
ROM address during the auto config process.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-07-08 13:06:40 +08:00 committed by Simon Glass
parent e1783b5ba3
commit 6c89663cb1
3 changed files with 22 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
drivers/pci/pci_auto.c
View File

@ -87,6 +87,8 @@ void pciauto_setup_device(struct pci_controller *hose,
pci_size_t bar_size;
u16 cmdstat = 0;
int bar, bar_nr = 0;
u8 header_type;
int rom_addr;
#ifndef CONFIG_PCI_ENUM_ONLY
pci_addr_t bar_value;
struct pci_region *bar_res;
@ -182,38 +184,32 @@ void pciauto_setup_device(struct pci_controller *hose,
bar_nr++;
}
/* Configure the expansion ROM address */
pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type);
if (header_type != PCI_HEADER_TYPE_CARDBUS) {
rom_addr = (header_type == PCI_HEADER_TYPE_NORMAL) ?
PCI_ROM_ADDRESS : PCI_ROM_ADDRESS1;
pci_hose_write_config_dword(hose, dev, rom_addr, 0xfffffffe);
pci_hose_read_config_dword(hose, dev, rom_addr, &bar_response);
if (bar_response) {
bar_size = -(bar_response & ~1);
DEBUGF("PCI Autoconfig: ROM, size=%#x, ", bar_size);
if (pciauto_region_allocate(mem, bar_size,
&bar_value) == 0) {
pci_hose_write_config_dword(hose, dev, rom_addr,
bar_value);
}
cmdstat |= PCI_COMMAND_MEMORY;
DEBUGF("\n");
}
}
pci_hose_write_config_word(hose, dev, PCI_COMMAND, cmdstat);
pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE,
CONFIG_SYS_PCI_CACHE_LINE_SIZE);
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)
{

5
drivers/pci/pci_rom.c
View File

@ -84,11 +84,6 @@ static int pci_rom_probe(pci_dev_t dev, uint class,
rom_address = CONFIG_VGA_BIOS_ADDR;
#else
if (pciauto_setup_rom(pci_bus_to_hose(PCI_BUS(dev)), dev)) {
debug("Cannot find option ROM\n");
return -ENOENT;
}
pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address);
if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
debug("%s: rom_address=%x\n", __func__, rom_address);

9
include/pci.h
View File

@ -721,15 +721,6 @@ void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
* */
u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum);
/**
* pciauto_setup_rom() - Set up access to a device ROM
*
* @hose: PCI hose to use
* @dev: PCI device to adjust
* @return 0 if done, -ve on error
*/
int pciauto_setup_rom(struct pci_controller *hose, pci_dev_t dev);
/**
* pci_hose_find_devices() - Find devices by vendor/device ID
*