According to RK3399 user manual, bit 9 in PCIE_RC_BAR_CONF should
be set, otherwise accessing to IO base and limit registers would
fail.
[ 0.411318] pci_bus 0000:00: root bus resource [bus 00-1f]
[ 0.411822] pci_bus 0000:00: root bus resource [mem 0xfa000000-0xfbdfffff]
[ 0.412440] pci_bus 0000:00: root bus resource [io 0x0000-0xfffff] (bus address [0xfbe00000-0xfbefffff])
[ 0.413665] pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[ 0.414698] pci 0000:01:00.0: reg 0x10: initial BAR value 0x00000000 invalid
[ 0.415412] pci 0000:01:00.0: reg 0x18: initial BAR value 0x00000000 invalid
[ 0.418456] pci 0000:00:00.0: BAR 8: assigned [mem 0xfa000000-0xfa0fffff]
[ 0.419065] pci 0000:01:00.0: BAR 1: assigned [mem 0xfa000000-0xfa007fff pref]
[ 0.419728] pci 0000:01:00.0: BAR 6: assigned [mem 0xfa008000-0xfa00ffff pref]
[ 0.420377] pci 0000:01:00.0: BAR 0: no space for [io size 0x0100]
[ 0.420935] pci 0000:01:00.0: BAR 0: failed to assign [io size 0x0100]
[ 0.421526] pci 0000:01:00.0: BAR 2: no space for [io size 0x0004]
[ 0.422084] pci 0000:01:00.0: BAR 2: failed to assign [io size 0x0004]
[ 0.422687] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 0.423135] pci 0000:00:00.0: bridge window [mem 0xfa000000-0xfa0fffff]
[ 0.423794] pcieport 0000:00:00.0: enabling device (0000 -> 0002)
[ 0.424566] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt
[ 0.425182] pci 0000:01:00.0: Signaling PME through PCIe PME interrupt
01:00.0 Class 0700: Device 1c00:3853 (rev 10) (prog-if 05)
Subsystem: Device 1c00:3853
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 230
Region 0: I/O ports at <unassigned> [disabled]
Region 1: Memory at fa000000 (32-bit, prefetchable) [disabled] [size=32K]
Region 2: I/O ports at <unassigned> [disabled]
[virtual] Expansion ROM at fa008000 [disabled] [size=32K]
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
---
drivers/pci/controller/pcie-rockchip.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
index c53d132..f82452b 100644
--- a/drivers/pci/controller/pcie-rockchip.c
+++ b/drivers/pci/controller/pcie-rockchip.c
@@ -407,8 +407,11 @@ void rockchip_pcie_cfg_configuration_accesses(
{
u32 ob_desc_0;
- /* Configuration Accesses for region 0 */
- rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
+ /*
+ * Configuration Accesses for region 0.
+ * Bit 9 is for enabling IO base and limit registers.
+ */
+ rockchip_pcie_write(rockchip, BIT(9), PCIE_RC_BAR_CONF);
rockchip_pcie_write(rockchip,
(RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
--
2.7.4
