@@ -31,6 +31,7 @@
#include <mmc.h>
#include <mtd_node.h>
#include <netdev.h>
+#include <pci.h>
#include <power/pmic.h>
#include <power/ltc3676_pmic.h>
#include <power/pfuze100_pmic.h>
@@ -1092,6 +1093,35 @@ int imx6_pcie_toggle_reset(void)
}
return 0;
}
+
+/*
+ * Most Ventana boards have a PLX PEX860x PCIe switch onboard and use its
+ * GPIO's as PERST# signals for its downstream ports - configure the GPIO's
+ * properly and assert reset for 100ms.
+ */
+void board_pci_fixup_dev(struct pci_controller *hose, pci_dev_t dev,
+ unsigned short vendor, unsigned short device,
+ unsigned short class)
+{
+ u32 dw;
+
+ debug("%s: %02d:%02d.%02d: %04x:%04x\n", __func__,
+ PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev), vendor, device);
+ if (vendor == PCI_VENDOR_ID_PLX &&
+ (device & 0xfff0) == 0x8600 &&
+ PCI_DEV(dev) == 0 && PCI_FUNC(dev) == 0) {
+ debug("configuring PLX 860X downstream PERST#\n");
+ pci_hose_read_config_dword(hose, dev, 0x62c, &dw);
+ dw |= 0xaaa8; /* GPIO1-7 outputs */
+ pci_hose_write_config_dword(hose, dev, 0x62c, dw);
+
+ pci_hose_read_config_dword(hose, dev, 0x644, &dw);
+ dw |= 0xfe; /* GPIO1-7 output high */
+ pci_hose_write_config_dword(hose, dev, 0x644, dw);
+
+ mdelay(100);
+ }
+}
#endif /* CONFIG_CMD_PCI */
#ifdef CONFIG_SERIAL_TAG
@@ -141,6 +141,7 @@
#define CONFIG_PCI
#define CONFIG_PCI_PNP
#define CONFIG_PCI_SCAN_SHOW
+#define CONFIG_PCI_FIXUP_DEV
#define CONFIG_PCIE_IMX
#endif
Most Gateworks Ventana boards use a PLX PEX860x PCIe switch for PCIe expansion. These boards use GPIO on the PLX device as PERST# for the downstream ports thus we assert this when the PLX is enumerated. Signed-off-by: Tim Harvey <tharvey@gateworks.com> --- board/gateworks/gw_ventana/gw_ventana.c | 30 ++++++++++++++++++++++++++++++ include/configs/gw_ventana.h | 1 + 2 files changed, 31 insertions(+)