From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pl1-x641.google.com ([2607:f8b0:4864:20::641]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gYlK4-0000sr-Ch for barebox@lists.infradead.org; Mon, 17 Dec 2018 05:20:19 +0000 Received: by mail-pl1-x641.google.com with SMTP id gn14so5545312plb.10 for ; Sun, 16 Dec 2018 21:19:59 -0800 (PST) From: Andrey Smirnov Date: Sun, 16 Dec 2018 21:18:35 -0800 Message-Id: <20181217051925.17582-16-andrew.smirnov@gmail.com> In-Reply-To: <20181217051925.17582-1-andrew.smirnov@gmail.com> References: <20181217051925.17582-1-andrew.smirnov@gmail.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 15/65] PCI: designware: Add default link up check if sub-driver doesn't override To: barebox@lists.infradead.org Cc: Andrey Smirnov Port of a Linux commit dac29e6c5460d05774e3e8c4fdf4d6e7bd481fab Add a default DesignWare "link_up" test for use when a sub-driver doesn't supply its own pcie_host_ops.link_up() method. [bhelgaas: changelog, split into its own patch] Signed-off-by: Joao Pinto Signed-off-by: Bjorn Helgaas Acked-by: Pratyush Anand Signed-off-by: Andrey Smirnov --- drivers/pci/pcie-designware.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pcie-designware.c b/drivers/pci/pcie-designware.c index ab6f1d289..d1c2635d6 100644 --- a/drivers/pci/pcie-designware.c +++ b/drivers/pci/pcie-designware.c @@ -72,6 +72,11 @@ #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16) #define PCIE_ATU_UPPER_TARGET 0x91C +/* PCIe Port Logic registers */ +#define PLR_OFFSET 0x700 +#define PCIE_PHY_DEBUG_R1 (PLR_OFFSET + 0x2c) +#define PCIE_PHY_DEBUG_R1_LINK_UP 0x00000010 + static unsigned long global_io_offset; int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val) @@ -191,10 +196,13 @@ int dw_pcie_wait_for_link(struct pcie_port *pp) int dw_pcie_link_up(struct pcie_port *pp) { + u32 val; + if (pp->ops->link_up) return pp->ops->link_up(pp); - return 0; + val = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1); + return val & PCIE_PHY_DEBUG_R1_LINK_UP; } static inline struct pcie_port *host_to_pcie(struct pci_controller *host) -- 2.19.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox