arm: juno: Enable PCI

The ARM Juno boards in their -r1 and -r2 variants sport a PCIe
controller, which we configure already in board specific code to be ECAM
compliant. Hence we can just enable the generic ECAM driver to let
U-Boot use PCIe devices.

Add the respective options to the Juno defconfig to enable the PCI
framework and the generic ECAM driver, and initialise the driver upon
loading U-Boot.

Make some functions in the Juno PCIe init code static on the way.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/board/armltd/vexpress64/pcie.c b/board/armltd/vexpress64/pcie.c
index 02de58b..733b190 100644 (file)
--- a/board/armltd/vexpress64/pcie.c
+++ b/board/armltd/vexpress64/pcie.c
@@ -72,9 +72,9 @@
                                         JUNO_RESET_STATUS_PHY | \
                                         JUNO_RESET_STATUS_RC)
 
-void xr3pci_set_atr_entry(unsigned long base, unsigned long src_addr,
-                       unsigned long trsl_addr, int window_size,
-                       int trsl_param)
+static void xr3pci_set_atr_entry(unsigned long base, unsigned long src_addr,
+                                unsigned long trsl_addr, int window_size,
+                                int trsl_param)
 {
        /* X3PCI_ATR_SRC_ADDR_LOW:
             - bit 0: enable entry,
@@ -94,7 +94,7 @@ void xr3pci_set_atr_entry(unsigned long base, unsigned long src_addr,
               ((u64)1) << window_size, trsl_param);
 }
 
-void xr3pci_setup_atr(void)
+static void xr3pci_setup_atr(void)
 {
        /* setup PCIe to CPU address translation tables */
        unsigned long base = XR3_CONFIG_BASE + XR3PCI_ATR_PCIE_WIN0;
@@ -141,7 +141,7 @@ void xr3pci_setup_atr(void)
                             XR3_PCI_MEMSPACE64_SIZE, XR3PCI_ATR_TRSLID_PCIE_MEMORY);
 }
 
-void xr3pci_init(void)
+static void xr3pci_init(void)
 {
        u32 val;
        int timeout = 200;
@@ -193,5 +193,9 @@ void xr3pci_init(void)
 
 void vexpress64_pcie_init(void)
 {
+       /* Initialise and configure the PCIe host bridge. */
        xr3pci_init();
+
+       /* Register the now ECAM complaint PCIe host controller with U-Boot. */
+       pci_init();
 }

diff --git a/configs/vexpress_aemv8a_juno_defconfig b/configs/vexpress_aemv8a_juno_defconfig
index 49acb34..4866a0e 100644 (file)
--- a/configs/vexpress_aemv8a_juno_defconfig
+++ b/configs/vexpress_aemv8a_juno_defconfig
@@ -32,6 +32,11 @@ CONFIG_CMD_UBI=y
 # CONFIG_ISO_PARTITION is not set
 # CONFIG_EFI_PARTITION is not set
 CONFIG_OF_BOARD=y
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_PCIE_ECAM_GENERIC=y
+CONFIG_DM_PCI_COMPAT=y
+CONFIG_CMD_PCI=y
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_ENV_ADDR=0xBFC0000
 # CONFIG_MMC is not set