From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753595AbeDTFZb (ORCPT ); Fri, 20 Apr 2018 01:25:31 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:5399 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751237AbeDTFZ2 (ORCPT ); Fri, 20 Apr 2018 01:25:28 -0400 X-UUID: 49e953eb44f1427d8274b3956fc6c116-20180420 From: To: , , , , , , , , , , , CC: , , , , , , Subject: [PATCH v6 1/2] PCI: mediatek: Set up vendor ID and class type for MT7622 Date: Fri, 20 Apr 2018 13:25:09 +0800 Message-ID: <1524201910-22836-2-git-send-email-honghui.zhang@mediatek.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1524201910-22836-1-git-send-email-honghui.zhang@mediatek.com> References: <1524201910-22836-1-git-send-email-honghui.zhang@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Honghui Zhang MT7622's hardware default value of vendor ID and class type is not correct, fix that by setup the correct values before linkup with Endpoint. Signed-off-by: Honghui Zhang --- drivers/pci/host/pcie-mediatek.c | 30 +++++++++++++++++++++++++++--- include/linux/pci_ids.h | 2 ++ 2 files changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/pci/host/pcie-mediatek.c b/drivers/pci/host/pcie-mediatek.c index a8b20c5..c3dc549 100644 --- a/drivers/pci/host/pcie-mediatek.c +++ b/drivers/pci/host/pcie-mediatek.c @@ -66,6 +66,10 @@ /* PCIe V2 per-port registers */ #define PCIE_MSI_VECTOR 0x0c0 + +#define PCIE_CONF_VEND_ID 0x100 +#define PCIE_CONF_CLASS_ID 0x106 + #define PCIE_INT_MASK 0x420 #define INTX_MASK GENMASK(19, 16) #define INTX_SHIFT 16 @@ -125,12 +129,14 @@ struct mtk_pcie_port; /** * struct mtk_pcie_soc - differentiate between host generations + * @need_fix_class_id: whether this host's class ID needed to be fixed or not * @has_msi: whether this host supports MSI interrupts or not * @ops: pointer to configuration access functions * @startup: pointer to controller setting functions * @setup_irq: pointer to initialize IRQ functions */ struct mtk_pcie_soc { + bool need_fix_class_id; bool has_msi; struct pci_ops *ops; int (*startup)(struct mtk_pcie_port *port); @@ -375,6 +381,7 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) { struct mtk_pcie *pcie = port->pcie; struct resource *mem = &pcie->mem; + const struct mtk_pcie_soc *soc = port->pcie->soc; u32 val; size_t size; int err; @@ -403,6 +410,15 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) PCIE_MAC_SRSTB | PCIE_CRSTB; writel(val, port->base + PCIE_RST_CTRL); + /* Set up vendor ID and class code */ + if (soc->need_fix_class_id) { + val = PCI_VENDOR_ID_MEDIATEK; + writew(val, port->base + PCIE_CONF_VEND_ID); + + val = PCI_CLASS_BRIDGE_PCI; + writew(val, port->base + PCIE_CONF_CLASS_ID); + } + /* 100ms timeout value should be enough for Gen1/2 training */ err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_V2, val, !!(val & PCIE_PORT_LINKUP_V2), 20, @@ -1142,7 +1158,15 @@ static const struct mtk_pcie_soc mtk_pcie_soc_v1 = { .startup = mtk_pcie_startup_port, }; -static const struct mtk_pcie_soc mtk_pcie_soc_v2 = { +static const struct mtk_pcie_soc mtk_pcie_soc_mt2712 = { + .has_msi = true, + .ops = &mtk_pcie_ops_v2, + .startup = mtk_pcie_startup_port_v2, + .setup_irq = mtk_pcie_setup_irq, +}; + +static const struct mtk_pcie_soc mtk_pcie_soc_mt7622 = { + .need_fix_class_id = true, .has_msi = true, .ops = &mtk_pcie_ops_v2, .startup = mtk_pcie_startup_port_v2, @@ -1152,8 +1176,8 @@ static const struct mtk_pcie_soc mtk_pcie_soc_v2 = { static const struct of_device_id mtk_pcie_ids[] = { { .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 }, { .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 }, - { .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_v2 }, - { .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_v2 }, + { .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_mt2712 }, + { .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_mt7622 }, {}, }; diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index a6b3066..9d4fca5 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2115,6 +2115,8 @@ #define PCI_VENDOR_ID_MYRICOM 0x14c1 +#define PCI_VENDOR_ID_MEDIATEK 0x14c3 + #define PCI_VENDOR_ID_TITAN 0x14D2 #define PCI_DEVICE_ID_TITAN_010L 0x8001 #define PCI_DEVICE_ID_TITAN_100L 0x8010 -- 2.6.4