From 355560d5883ea0188ddb28dd2da9b54e629bd132 Mon Sep 17 00:00:00 2001 From: Marcel Ziswiler Date: Tue, 8 May 2018 17:34:09 +0200 Subject: [PATCH] pci: tegra: introduce weak tegra_pcie_board_port_reset() function Introduce a weak tegra_pcie_board_port_reset() function by default calling the existing tegra_pcie_port_reset() function. Additionally add a tegra_pcie_port_index_of_port() function to retrieve the specific PCIe port index if required. This allows overriding the PCIe port reset functionality from board specific code as e.g. required for Apalis T30 and Apalis TK1. Signed-off-by: Marcel Ziswiler Acked-by: Stephen Warren Signed-off-by: Tom Warren --- drivers/pci/pci_tegra.c | 17 ++++++++++++++--- include/pci_tegra.h | 10 ++++++++++ 2 files changed, 24 insertions(+), 3 deletions(-) create mode 100644 include/pci_tegra.h diff --git a/drivers/pci/pci_tegra.c b/drivers/pci/pci_tegra.c index b325914b15..56c08585e6 100644 --- a/drivers/pci/pci_tegra.c +++ b/drivers/pci/pci_tegra.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -888,7 +889,7 @@ static unsigned long tegra_pcie_port_get_pex_ctrl(struct tegra_pcie_port *port) return ret; } -static void tegra_pcie_port_reset(struct tegra_pcie_port *port) +void tegra_pcie_port_reset(struct tegra_pcie_port *port) { unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port); unsigned long value; @@ -905,6 +906,16 @@ static void tegra_pcie_port_reset(struct tegra_pcie_port *port) afi_writel(port->pcie, value, ctrl); } +int tegra_pcie_port_index_of_port(struct tegra_pcie_port *port) +{ + return port->index; +} + +void __weak tegra_pcie_board_port_reset(struct tegra_pcie_port *port) +{ + tegra_pcie_port_reset(port); +} + static void tegra_pcie_port_enable(struct tegra_pcie_port *port) { struct tegra_pcie *pcie = port->pcie; @@ -923,7 +934,7 @@ static void tegra_pcie_port_enable(struct tegra_pcie_port *port) afi_writel(pcie, value, ctrl); - tegra_pcie_port_reset(port); + tegra_pcie_board_port_reset(port); if (soc->force_pca_enable) { value = rp_readl(port, RP_VEND_CTL2); @@ -974,7 +985,7 @@ static bool tegra_pcie_port_check_link(struct tegra_pcie_port *port) } while (--timeout); retry: - tegra_pcie_port_reset(port); + tegra_pcie_board_port_reset(port); } while (--retries); return false; diff --git a/include/pci_tegra.h b/include/pci_tegra.h new file mode 100644 index 0000000000..11e92fc26d --- /dev/null +++ b/include/pci_tegra.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2018 Toradex, Inc. + */ + +struct tegra_pcie_port; + +int tegra_pcie_port_index_of_port(struct tegra_pcie_port *port); + +void tegra_pcie_port_reset(struct tegra_pcie_port *port);