PCI: aardvark: Fix support for PCI_ROM_ADDRESS1 on emulated bridge

commit 239edf686c14a9ff926dec2f350289ed7adfefe2 upstream.

This register is exported at address offset 0x30.

Link: https://lore.kernel.org/r/20211028185659.20329-8-kabel@kernel.org
Fixes: 8a3ebd8de328 ("PCI: aardvark: Implement emulated root PCI bridge config space")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index b1c0f51..0dd4243 100644 (file)
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -32,6 +32,7 @@
 #define PCIE_CORE_DEV_ID_REG                                   0x0
 #define PCIE_CORE_CMD_STATUS_REG                               0x4
 #define PCIE_CORE_DEV_REV_REG                                  0x8
+#define PCIE_CORE_EXP_ROM_BAR_REG                              0x30
 #define PCIE_CORE_PCIEXP_CAP                                   0xc0
 #define PCIE_CORE_ERR_CAPCTL_REG                               0x118
 #define     PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX                   BIT(5)
@@ -813,6 +814,10 @@ advk_pci_bridge_emul_base_conf_read(struct pci_bridge_emul *bridge,
                *value = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);
                return PCI_BRIDGE_EMUL_HANDLED;
 
+       case PCI_ROM_ADDRESS1:
+               *value = advk_readl(pcie, PCIE_CORE_EXP_ROM_BAR_REG);
+               return PCI_BRIDGE_EMUL_HANDLED;
+
        case PCI_INTERRUPT_LINE: {
                /*
                 * From the whole 32bit register we support reading from HW only
@@ -845,6 +850,10 @@ advk_pci_bridge_emul_base_conf_write(struct pci_bridge_emul *bridge,
                advk_writel(pcie, new, PCIE_CORE_CMD_STATUS_REG);
                break;
 
+       case PCI_ROM_ADDRESS1:
+               advk_writel(pcie, new, PCIE_CORE_EXP_ROM_BAR_REG);
+               break;
+
        case PCI_INTERRUPT_LINE:
                if (mask & (PCI_BRIDGE_CTL_BUS_RESET << 16)) {
                        u32 val = advk_readl(pcie, PCIE_CORE_CTRL1_REG);