From patchwork Wed Jan 13 11:39:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425769 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5Bs6Xxjz9sVy for ; Wed, 13 Jan 2021 22:41:57 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726184AbhAMLlm (ORCPT ); Wed, 13 Jan 2021 06:41:42 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:60724 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725901AbhAMLlk (ORCPT ); Wed, 13 Jan 2021 06:41:40 -0500 X-UUID: 581784e97650406c829ba59661b656b4-20210113 X-UUID: 581784e97650406c829ba59661b656b4-20210113 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1518733740; Wed, 13 Jan 2021 19:40:55 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:40:54 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:53 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,1/7] dt-bindings: PCI: mediatek-gen3: Add YAML schema Date: Wed, 13 Jan 2021 19:39:55 +0800 Message-ID: <20210113114001.5804-2-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add YAML schemas documentation for Gen3 PCIe controller on MediaTek SoCs. Signed-off-by: Jianjun Wang Acked-by: Ryder Lee --- .../bindings/pci/mediatek-pcie-gen3.yaml | 172 ++++++++++++++++++ 1 file changed, 172 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml new file mode 100644 index 000000000000..f133fb0184f1 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml @@ -0,0 +1,172 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/mediatek-pcie-gen3.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Gen3 PCIe controller on MediaTek SoCs + +maintainers: + - Jianjun Wang + +description: |+ + PCIe Gen3 MAC controller for MediaTek SoCs, it supports Gen3 speed + and compatible with Gen2, Gen1 speed. + + This PCIe controller supports up to 256 MSI vectors, the MSI hardware + block diagram is as follows: + + +-----+ + | GIC | + +-----+ + ^ + | + port->irq + | + +-+-+-+-+-+-+-+-+ + |0|1|2|3|4|5|6|7| (PCIe intc) + +-+-+-+-+-+-+-+-+ + ^ ^ ^ + | | ... | + +-------+ +------+ +-----------+ + | | | + +-+-+---+--+--+ +-+-+---+--+--+ +-+-+---+--+--+ + |0|1|...|30|31| |0|1|...|30|31| |0|1|...|30|31| (MSI sets) + +-+-+---+--+--+ +-+-+---+--+--+ +-+-+---+--+--+ + ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ + | | | | | | | | | | | | (MSI vectors) + | | | | | | | | | | | | + + (MSI SET0) (MSI SET1) ... (MSI SET7) + + With 256 MSI vectors supported, the MSI vectors are composed of 8 sets, + each set has its own address for MSI message, and supports 32 MSI vectors + to generate interrupt. + +allOf: + - $ref: /schemas/pci/pci-bus.yaml# + +properties: + compatible: + const: mediatek,mt8192-pcie + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + ranges: + minItems: 1 + maxItems: 8 + + resets: + minItems: 1 + maxItems: 2 + + reset-names: + anyOf: + - const: mac + - const: phy + + clocks: + maxItems: 6 + + clock-names: + items: + - const: pl_250m + - const: tl_26m + - const: tl_96m + - const: tl_32k + - const: peri_26m + - const: top_133m + + assigned-clocks: + maxItems: 1 + + assigned-clock-parents: + maxItems: 1 + + phys: + maxItems: 1 + + '#interrupt-cells': + const: 1 + + interrupt-controller: + description: Interrupt controller node for handling legacy PCI interrupts. + type: object + properties: + '#address-cells': + const: 0 + '#interrupt-cells': + const: 1 + interrupt-controller: true + + required: + - '#address-cells' + - '#interrupt-cells' + - interrupt-controller + + additionalProperties: false + +required: + - compatible + - reg + - interrupts + - ranges + - clocks + - '#interrupt-cells' + - interrupt-controller + +unevaluatedProperties: false + +examples: + - | + #include + #include + + bus { + #address-cells = <2>; + #size-cells = <2>; + + pcie: pcie@11230000 { + compatible = "mediatek,mt8192-pcie"; + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + reg = <0x00 0x11230000 0x00 0x4000>; + reg-names = "pcie-mac"; + interrupts = ; + bus-range = <0x00 0xff>; + ranges = <0x82000000 0x00 0x12000000 0x00 + 0x12000000 0x00 0x1000000>; + clocks = <&infracfg 44>, + <&infracfg 40>, + <&infracfg 43>, + <&infracfg 97>, + <&infracfg 99>, + <&infracfg 111>; + clock-names = "pl_250m", "tl_26m", "tl_96m", + "tl_32k", "peri_26m", "top_133m"; + assigned-clocks = <&topckgen 50>; + assigned-clock-parents = <&topckgen 91>; + + phys = <&pciephy>; + phy-names = "pcie-phy"; + resets = <&infracfg_rst 0>; + reset-names = "phy"; + + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0x7>; + interrupt-map = <0 0 0 1 &pcie_intc 0>, + <0 0 0 2 &pcie_intc 1>, + <0 0 0 3 &pcie_intc 2>, + <0 0 0 4 &pcie_intc 3>; + pcie_intc: interrupt-controller { + #address-cells = <0>; + #interrupt-cells = <1>; + interrupt-controller; + }; + }; + }; From patchwork Wed Jan 13 11:39:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425773 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5Bx0gs2z9sWT for ; Wed, 13 Jan 2021 22:42:01 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726609AbhAMLlw (ORCPT ); Wed, 13 Jan 2021 06:41:52 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:34849 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725998AbhAMLll (ORCPT ); Wed, 13 Jan 2021 06:41:41 -0500 X-UUID: 3a6d89cf4b1741bfaed0d92d725d5db4-20210113 X-UUID: 3a6d89cf4b1741bfaed0d92d725d5db4-20210113 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1692474916; Wed, 13 Jan 2021 19:40:57 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:40:55 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:54 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,2/7] PCI: Export pci_pio_to_address() for module use Date: Wed, 13 Jan 2021 19:39:56 +0800 Message-ID: <20210113114001.5804-3-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This interface will be used by PCI host drivers for PIO translation, export it to support compiling those drivers as kernel modules. Signed-off-by: Jianjun Wang --- drivers/pci/pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 6d4d5a2f923d..3de714db2557 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4016,6 +4016,7 @@ phys_addr_t pci_pio_to_address(unsigned long pio) return address; } +EXPORT_SYMBOL(pci_pio_to_address); unsigned long __weak pci_address_to_pio(phys_addr_t address) { From patchwork Wed Jan 13 11:39:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425771 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5Bv1Nplz9sSC for ; Wed, 13 Jan 2021 22:41:59 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726398AbhAMLlq (ORCPT ); Wed, 13 Jan 2021 06:41:46 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:34873 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725372AbhAMLlp (ORCPT ); Wed, 13 Jan 2021 06:41:45 -0500 X-UUID: 44ac158b0788455b9472110cc5bb09d9-20210113 X-UUID: 44ac158b0788455b9472110cc5bb09d9-20210113 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 693322507; Wed, 13 Jan 2021 19:40:58 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:40:56 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:55 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,3/7] PCI: mediatek-gen3: Add MediaTek Gen3 driver for MT8192 Date: Wed, 13 Jan 2021 19:39:57 +0800 Message-ID: <20210113114001.5804-4-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org MediaTek's PCIe host controller has three generation HWs, the new generation HW is an individual bridge, it supports Gen3 speed and compatible with Gen2, Gen1 speed. Add support for new Gen3 controller which can be found on MT8192. Signed-off-by: Jianjun Wang Acked-by: Ryder Lee --- drivers/pci/controller/Kconfig | 13 + drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pcie-mediatek-gen3.c | 463 ++++++++++++++++++++ 3 files changed, 477 insertions(+) create mode 100644 drivers/pci/controller/pcie-mediatek-gen3.c diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 64e2f5e379aa..b242b17025b3 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -242,6 +242,19 @@ config PCIE_MEDIATEK Say Y here if you want to enable PCIe controller support on MediaTek SoCs. +config PCIE_MEDIATEK_GEN3 + tristate "MediaTek Gen3 PCIe controller" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on PCI_MSI_IRQ_DOMAIN + help + Adds support for PCIe Gen3 MAC controller for MediaTek SoCs. + This PCIe controller is compatible with Gen3, Gen2 and Gen1 speed, + and support up to 256 MSI interrupt numbers for + multi-function devices. + + Say Y here if you want to enable Gen3 PCIe controller support on + MediaTek SoCs. + config PCIE_TANGO_SMP8759 bool "Tango SMP8759 PCIe controller (DANGEROUS)" depends on ARCH_TANGO && PCI_MSI && OF diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile index 04c6edc285c5..df5d77d72a9d 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o +obj-$(CONFIG_PCIE_MEDIATEK_GEN3) += pcie-mediatek-gen3.o obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o obj-$(CONFIG_VMD) += vmd.o obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c new file mode 100644 index 000000000000..c00ea7c167de --- /dev/null +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -0,0 +1,463 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MediaTek PCIe host controller driver. + * + * Copyright (c) 2020 MediaTek Inc. + * Author: Jianjun Wang + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../pci.h" + +#define PCIE_SETTING_REG 0x80 +#define PCIE_PCI_IDS_1 0x9c +#define PCI_CLASS(class) (class << 8) +#define PCIE_RC_MODE BIT(0) + +#define PCIE_CFGNUM_REG 0x140 +#define PCIE_CFG_DEVFN(devfn) ((devfn) & GENMASK(7, 0)) +#define PCIE_CFG_BUS(bus) (((bus) << 8) & GENMASK(15, 8)) +#define PCIE_CFG_BYTE_EN(bytes) (((bytes) << 16) & GENMASK(19, 16)) +#define PCIE_CFG_FORCE_BYTE_EN BIT(20) +#define PCIE_CFG_OFFSET_ADDR 0x1000 +#define PCIE_CFG_HEADER(bus, devfn) \ + (PCIE_CFG_BUS(bus) | PCIE_CFG_DEVFN(devfn)) + +#define PCIE_RST_CTRL_REG 0x148 +#define PCIE_MAC_RSTB BIT(0) +#define PCIE_PHY_RSTB BIT(1) +#define PCIE_BRG_RSTB BIT(2) +#define PCIE_PE_RSTB BIT(3) + +#define PCIE_LTSSM_STATUS_REG 0x150 + +#define PCIE_LINK_STATUS_REG 0x154 +#define PCIE_PORT_LINKUP BIT(8) + +#define PCIE_TRANS_TABLE_BASE_REG 0x800 +#define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 +#define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8 +#define PCIE_ATR_TRSL_ADDR_MSB_OFFSET 0xc +#define PCIE_ATR_TRSL_PARAM_OFFSET 0x10 +#define PCIE_ATR_TLB_SET_OFFSET 0x20 + +#define PCIE_MAX_TRANS_TABLES 8 +#define PCIE_ATR_EN BIT(0) +#define PCIE_ATR_SIZE(size) \ + (((((size) - 1) << 1) & GENMASK(6, 1)) | PCIE_ATR_EN) +#define PCIE_ATR_ID(id) ((id) & GENMASK(3, 0)) +#define PCIE_ATR_TYPE_MEM PCIE_ATR_ID(0) +#define PCIE_ATR_TYPE_IO PCIE_ATR_ID(1) +#define PCIE_ATR_TLP_TYPE(type) (((type) << 16) & GENMASK(18, 16)) +#define PCIE_ATR_TLP_TYPE_MEM PCIE_ATR_TLP_TYPE(0) +#define PCIE_ATR_TLP_TYPE_IO PCIE_ATR_TLP_TYPE(2) + +/** + * struct mtk_pcie_port - PCIe port information + * @dev: pointer to PCIe device + * @base: IO mapped register base + * @reg_base: Physical register base + * @mac_reset: mac reset control + * @phy_reset: phy reset control + * @phy: PHY controller block + * @clks: PCIe clocks + * @num_clks: PCIe clocks count for this port + */ +struct mtk_pcie_port { + struct device *dev; + void __iomem *base; + phys_addr_t reg_base; + struct reset_control *mac_reset; + struct reset_control *phy_reset; + struct phy *phy; + struct clk_bulk_data *clks; + int num_clks; +}; + +/** + * mtk_pcie_config_tlp_header + * @bus: PCI bus to query + * @devfn: device/function number + * @where: offset in config space + * @size: data size in TLP header + * + * Set byte enable field and device information in configuration TLP header. + */ +static void mtk_pcie_config_tlp_header(struct pci_bus *bus, unsigned int devfn, + int where, int size) +{ + struct mtk_pcie_port *port = bus->sysdata; + int bytes; + u32 val; + + bytes = (GENMASK(size - 1, 0) & 0xf) << (where & 0x3); + + val = PCIE_CFG_FORCE_BYTE_EN | PCIE_CFG_BYTE_EN(bytes) | + PCIE_CFG_HEADER(bus->number, devfn); + + writel_relaxed(val, port->base + PCIE_CFGNUM_REG); +} + +static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus, unsigned int devfn, + int where) +{ + struct mtk_pcie_port *port = bus->sysdata; + + return port->base + PCIE_CFG_OFFSET_ADDR + where; +} + +static int mtk_pcie_config_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + mtk_pcie_config_tlp_header(bus, devfn, where, size); + + return pci_generic_config_read32(bus, devfn, where, size, val); +} + +static int mtk_pcie_config_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + mtk_pcie_config_tlp_header(bus, devfn, where, size); + + if (size <= 2) + val <<= (where & 0x3) * 8; + + return pci_generic_config_write32(bus, devfn, where, 4, val); +} + +static struct pci_ops mtk_pcie_ops = { + .map_bus = mtk_pcie_map_bus, + .read = mtk_pcie_config_read, + .write = mtk_pcie_config_write, +}; + +static int mtk_pcie_set_trans_table(struct mtk_pcie_port *port, + resource_size_t cpu_addr, + resource_size_t pci_addr, + resource_size_t size, + unsigned long type, int num) +{ + void __iomem *table; + u32 val; + + if (num >= PCIE_MAX_TRANS_TABLES) { + dev_err(port->dev, "not enough translate table[%d] for addr: %#llx, limited to [%d]\n", + num, (unsigned long long) cpu_addr, + PCIE_MAX_TRANS_TABLES); + return -ENODEV; + } + + table = port->base + PCIE_TRANS_TABLE_BASE_REG + + num * PCIE_ATR_TLB_SET_OFFSET; + + writel_relaxed(lower_32_bits(cpu_addr) | PCIE_ATR_SIZE(fls(size) - 1), + table); + writel_relaxed(upper_32_bits(cpu_addr), + table + PCIE_ATR_SRC_ADDR_MSB_OFFSET); + writel_relaxed(lower_32_bits(pci_addr), + table + PCIE_ATR_TRSL_ADDR_LSB_OFFSET); + writel_relaxed(upper_32_bits(pci_addr), + table + PCIE_ATR_TRSL_ADDR_MSB_OFFSET); + + if (type == IORESOURCE_IO) + val = PCIE_ATR_TYPE_IO | PCIE_ATR_TLP_TYPE_IO; + else + val = PCIE_ATR_TYPE_MEM | PCIE_ATR_TLP_TYPE_MEM; + + writel_relaxed(val, table + PCIE_ATR_TRSL_PARAM_OFFSET); + + return 0; +} + +static int mtk_pcie_startup_port(struct mtk_pcie_port *port) +{ + struct resource_entry *entry; + struct pci_host_bridge *host = pci_host_bridge_from_priv(port); + unsigned int table_index = 0; + int err; + u32 val; + + /* Set as RC mode */ + val = readl_relaxed(port->base + PCIE_SETTING_REG); + val |= PCIE_RC_MODE; + writel_relaxed(val, port->base + PCIE_SETTING_REG); + + /* Set class code */ + val = readl_relaxed(port->base + PCIE_PCI_IDS_1); + val &= ~GENMASK(31, 8); + val |= PCI_CLASS(PCI_CLASS_BRIDGE_PCI << 8); + writel_relaxed(val, port->base + PCIE_PCI_IDS_1); + + /* Assert all reset signals */ + val = readl_relaxed(port->base + PCIE_RST_CTRL_REG); + val |= PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB; + writel_relaxed(val, port->base + PCIE_RST_CTRL_REG); + + /* De-assert reset signals */ + val &= ~(PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB); + writel_relaxed(val, port->base + PCIE_RST_CTRL_REG); + + /* Delay 100ms to wait the reference clocks become stable */ + msleep(100); + + /* De-assert PERST# signal */ + val &= ~PCIE_PE_RSTB; + writel_relaxed(val, port->base + PCIE_RST_CTRL_REG); + + /* Check if the link is up or not */ + err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_REG, val, + !!(val & PCIE_PORT_LINKUP), 20, + 50 * USEC_PER_MSEC); + if (err) { + val = readl_relaxed(port->base + PCIE_LTSSM_STATUS_REG); + dev_err(port->dev, "PCIe link down, ltssm reg val: %#x\n", val); + return err; + } + + /* Set PCIe translation windows */ + resource_list_for_each_entry(entry, &host->windows) { + struct resource *res = entry->res; + unsigned long type = resource_type(res); + resource_size_t cpu_addr; + resource_size_t pci_addr; + resource_size_t size; + const char *range_type; + + if (type == IORESOURCE_IO) { + cpu_addr = pci_pio_to_address(res->start); + range_type = "IO"; + } else if (type == IORESOURCE_MEM) { + cpu_addr = res->start; + range_type = "MEM"; + } else { + continue; + } + + pci_addr = res->start - entry->offset; + size = resource_size(res); + err = mtk_pcie_set_trans_table(port, cpu_addr, pci_addr, size, + type, table_index); + if (err) + return err; + + dev_dbg(port->dev, "set %s trans window[%d]: cpu_addr = %#llx, pci_addr = %#llx, size = %#llx\n", + range_type, table_index, (unsigned long long) cpu_addr, + (unsigned long long) pci_addr, + (unsigned long long) size); + + table_index++; + } + + return 0; +} + +static int mtk_pcie_clk_init(struct mtk_pcie_port *port) +{ + int ret; + + port->num_clks = devm_clk_bulk_get_all(port->dev, &port->clks); + if (port->num_clks < 0) { + dev_err(port->dev, "failed to get PCIe clock\n"); + return port->num_clks; + } + + ret = clk_bulk_prepare_enable(port->num_clks, port->clks); + if (ret) { + dev_err(port->dev, "failed to enable PCIe clocks\n"); + return ret; + } + + return 0; +} + +static int mtk_pcie_power_up(struct mtk_pcie_port *port) +{ + struct device *dev = port->dev; + int err; + + port->phy_reset = devm_reset_control_get_optional_exclusive(dev, "phy"); + if (IS_ERR(port->phy_reset)) + return PTR_ERR(port->phy_reset); + + /* PHY power on and enable pipe clock */ + port->phy = devm_phy_optional_get(dev, "pcie-phy"); + if (IS_ERR(port->phy)) + return PTR_ERR(port->phy); + + reset_control_deassert(port->phy_reset); + + err = phy_init(port->phy); + if (err) { + dev_err(dev, "failed to initialize PCIe phy\n"); + goto err_phy_init; + } + + err = phy_power_on(port->phy); + if (err) { + dev_err(dev, "failed to power on PCIe phy\n"); + goto err_phy_on; + } + + port->mac_reset = devm_reset_control_get_optional_exclusive(dev, "mac"); + if (IS_ERR(port->mac_reset)) { + err = PTR_ERR(port->mac_reset); + goto err_mac_rst; + } + + reset_control_deassert(port->mac_reset); + + /* MAC power on and enable transaction layer clocks */ + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + + err = mtk_pcie_clk_init(port); + if (err) { + dev_err(dev, "clock init failed\n"); + goto err_clk_init; + } + + return 0; + +err_clk_init: + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + reset_control_assert(port->mac_reset); +err_mac_rst: + phy_power_off(port->phy); +err_phy_on: + phy_exit(port->phy); +err_phy_init: + reset_control_assert(port->phy_reset); + + return err; +} + +static void mtk_pcie_power_down(struct mtk_pcie_port *port) +{ + clk_bulk_disable_unprepare(port->num_clks, port->clks); + + pm_runtime_put_sync(port->dev); + pm_runtime_disable(port->dev); + reset_control_assert(port->mac_reset); + + phy_power_off(port->phy); + phy_exit(port->phy); + reset_control_assert(port->phy_reset); +} + +static int mtk_pcie_setup(struct mtk_pcie_port *port) +{ + struct device *dev = port->dev; + struct platform_device *pdev = to_platform_device(dev); + struct resource *regs; + int err; + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcie-mac"); + port->base = devm_ioremap_resource(dev, regs); + if (IS_ERR(port->base)) { + dev_err(dev, "failed to map register base\n"); + return PTR_ERR(port->base); + } + + port->reg_base = regs->start; + + /* Don't touch the hardware registers before power up */ + err = mtk_pcie_power_up(port); + if (err) + return err; + + /* Try link up */ + err = mtk_pcie_startup_port(port); + if (err) { + dev_err(dev, "PCIe startup failed\n"); + goto err_setup; + } + + dev_info(dev, "PCIe link up success!\n"); + + return 0; + +err_setup: + mtk_pcie_power_down(port); + + return err; +} + +static int mtk_pcie_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_pcie_port *port; + struct pci_host_bridge *host; + int err; + + host = devm_pci_alloc_host_bridge(dev, sizeof(*port)); + if (!host) + return -ENOMEM; + + port = pci_host_bridge_priv(host); + + port->dev = dev; + platform_set_drvdata(pdev, port); + + err = mtk_pcie_setup(port); + if (err) + return err; + + host->ops = &mtk_pcie_ops; + host->sysdata = port; + + err = pci_host_probe(host); + if (err) { + mtk_pcie_power_down(port); + return err; + } + + return 0; +} + +static int mtk_pcie_remove(struct platform_device *pdev) +{ + struct mtk_pcie_port *port = platform_get_drvdata(pdev); + struct pci_host_bridge *host = pci_host_bridge_from_priv(port); + + pci_lock_rescan_remove(); + pci_stop_root_bus(host->bus); + pci_remove_root_bus(host->bus); + pci_unlock_rescan_remove(); + + mtk_pcie_power_down(port); + + return 0; +} + +static const struct of_device_id mtk_pcie_of_match[] = { + { .compatible = "mediatek,mt8192-pcie" }, + {}, +}; + +static struct platform_driver mtk_pcie_driver = { + .probe = mtk_pcie_probe, + .remove = mtk_pcie_remove, + .driver = { + .name = "mtk-pcie", + .of_match_table = mtk_pcie_of_match, + }, +}; + +module_platform_driver(mtk_pcie_driver); +MODULE_LICENSE("GPL v2"); From patchwork Wed Jan 13 11:39:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425778 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5CY0vWMz9sWd for ; Wed, 13 Jan 2021 22:42:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726685AbhAMLl5 (ORCPT ); Wed, 13 Jan 2021 06:41:57 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:60724 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726657AbhAMLl5 (ORCPT ); Wed, 13 Jan 2021 06:41:57 -0500 X-UUID: eea8de01fa764267a6048b030ab8d2a4-20210113 X-UUID: eea8de01fa764267a6048b030ab8d2a4-20210113 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1776978361; Wed, 13 Jan 2021 19:40:59 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:40:58 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:56 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,4/7] PCI: mediatek-gen3: Add INTx support Date: Wed, 13 Jan 2021 19:39:58 +0800 Message-ID: <20210113114001.5804-5-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add INTx support for MediaTek Gen3 PCIe controller. Signed-off-by: Jianjun Wang Acked-by: Ryder Lee --- drivers/pci/controller/pcie-mediatek-gen3.c | 163 ++++++++++++++++++++ 1 file changed, 163 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index c00ea7c167de..7979a2856c35 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -9,6 +9,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -49,6 +52,12 @@ #define PCIE_LINK_STATUS_REG 0x154 #define PCIE_PORT_LINKUP BIT(8) +#define PCIE_INT_ENABLE_REG 0x180 +#define PCIE_INTX_SHIFT 24 +#define PCIE_INTX_MASK GENMASK(27, 24) + +#define PCIE_INT_STATUS_REG 0x184 + #define PCIE_TRANS_TABLE_BASE_REG 0x800 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8 @@ -77,6 +86,8 @@ * @phy: PHY controller block * @clks: PCIe clocks * @num_clks: PCIe clocks count for this port + * @irq: PCIe controller interrupt number + * @intx_domain: legacy INTx IRQ domain */ struct mtk_pcie_port { struct device *dev; @@ -87,6 +98,9 @@ struct mtk_pcie_port { struct phy *phy; struct clk_bulk_data *clks; int num_clks; + + int irq; + struct irq_domain *intx_domain; }; /** @@ -266,6 +280,149 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port) return 0; } +static int mtk_pcie_set_affinity(struct irq_data *data, + const struct cpumask *mask, bool force) +{ + return -EINVAL; +} + +static void mtk_intx_mask(struct irq_data *data) +{ + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); + u32 val; + + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); + val &= ~BIT(data->hwirq + PCIE_INTX_SHIFT); + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); +} + +static void mtk_intx_unmask(struct irq_data *data) +{ + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); + u32 val; + + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); + val |= BIT(data->hwirq + PCIE_INTX_SHIFT); + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); +} + +/** + * mtk_intx_eoi + * @data: pointer to chip specific data + * + * As an emulated level IRQ, its interrupt status will remain + * until the corresponding de-assert message is received; hence that + * the status can only be cleared when the interrupt has been serviced. + */ +static void mtk_intx_eoi(struct irq_data *data) +{ + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); + unsigned long hwirq; + + hwirq = data->hwirq + PCIE_INTX_SHIFT; + writel_relaxed(BIT(hwirq), port->base + PCIE_INT_STATUS_REG); +} + +static struct irq_chip mtk_intx_irq_chip = { + .irq_mask = mtk_intx_mask, + .irq_unmask = mtk_intx_unmask, + .irq_eoi = mtk_intx_eoi, + .irq_set_affinity = mtk_pcie_set_affinity, + .name = "PCIe", +}; + +static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler_name(irq, &mtk_intx_irq_chip, + handle_fasteoi_irq, "INTx"); + irq_set_chip_data(irq, domain->host_data); + + return 0; +} + +static const struct irq_domain_ops intx_domain_ops = { + .map = mtk_pcie_intx_map, +}; + +static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port, + struct device_node *node) +{ + struct device *dev = port->dev; + struct device_node *intc_node; + + /* Setup INTx */ + intc_node = of_get_child_by_name(node, "interrupt-controller"); + if (!intc_node) { + dev_err(dev, "missing PCIe Intc node\n"); + return -ENODEV; + } + + port->intx_domain = irq_domain_add_linear(intc_node, PCI_NUM_INTX, + &intx_domain_ops, port); + if (!port->intx_domain) { + dev_err(dev, "failed to get INTx IRQ domain\n"); + return -ENODEV; + } + + return 0; +} + +static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port) +{ + irq_set_chained_handler_and_data(port->irq, NULL, NULL); + + if (port->intx_domain) + irq_domain_remove(port->intx_domain); + + irq_dispose_mapping(port->irq); +} + +static void mtk_pcie_irq_handler(struct irq_desc *desc) +{ + struct mtk_pcie_port *port = irq_desc_get_handler_data(desc); + struct irq_chip *irqchip = irq_desc_get_chip(desc); + unsigned long status; + unsigned int virq; + irq_hw_number_t irq_bit = PCIE_INTX_SHIFT; + + chained_irq_enter(irqchip, desc); + + status = readl_relaxed(port->base + PCIE_INT_STATUS_REG); + if (status & PCIE_INTX_MASK) { + for_each_set_bit_from(irq_bit, &status, PCI_NUM_INTX + + PCIE_INTX_SHIFT) { + virq = irq_find_mapping(port->intx_domain, + irq_bit - PCIE_INTX_SHIFT); + generic_handle_irq(virq); + } + } + + chained_irq_exit(irqchip, desc); +} + +static int mtk_pcie_setup_irq(struct mtk_pcie_port *port, + struct device_node *node) +{ + struct device *dev = port->dev; + struct platform_device *pdev = to_platform_device(dev); + int err; + + err = mtk_pcie_init_irq_domains(port, node); + if (err) { + dev_err(dev, "failed to init PCIe IRQ domain\n"); + return err; + } + + port->irq = platform_get_irq(pdev, 0); + if (port->irq < 0) + return port->irq; + + irq_set_chained_handler_and_data(port->irq, mtk_pcie_irq_handler, port); + + return 0; +} + static int mtk_pcie_clk_init(struct mtk_pcie_port *port) { int ret; @@ -388,6 +545,10 @@ static int mtk_pcie_setup(struct mtk_pcie_port *port) goto err_setup; } + err = mtk_pcie_setup_irq(port, dev->of_node); + if (err) + goto err_setup; + dev_info(dev, "PCIe link up success!\n"); return 0; @@ -423,6 +584,7 @@ static int mtk_pcie_probe(struct platform_device *pdev) err = pci_host_probe(host); if (err) { + mtk_pcie_irq_teardown(port); mtk_pcie_power_down(port); return err; } @@ -440,6 +602,7 @@ static int mtk_pcie_remove(struct platform_device *pdev) pci_remove_root_bus(host->bus); pci_unlock_rescan_remove(); + mtk_pcie_irq_teardown(port); mtk_pcie_power_down(port); return 0; From patchwork Wed Jan 13 11:39:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425777 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5CX31q1z9sSC for ; Wed, 13 Jan 2021 22:42:32 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726830AbhAMLmF (ORCPT ); Wed, 13 Jan 2021 06:42:05 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:34873 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725998AbhAMLmE (ORCPT ); Wed, 13 Jan 2021 06:42:04 -0500 X-UUID: 37fa59a4344c41feb5ac9937a6bad1da-20210113 X-UUID: 37fa59a4344c41feb5ac9937a6bad1da-20210113 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1660894844; Wed, 13 Jan 2021 19:41:00 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:40:59 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:57 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,5/7] PCI: mediatek-gen3: Add MSI support Date: Wed, 13 Jan 2021 19:39:59 +0800 Message-ID: <20210113114001.5804-6-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: B04B4118CFA533AB7E50A2A7063C9CD4D2B1FED9D840495C618749C553E592C82000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add MSI support for MediaTek Gen3 PCIe controller. This PCIe controller supports up to 256 MSI vectors, the MSI hardware block diagram is as follows: +-----+ | GIC | +-----+ ^ | port->irq | +-+-+-+-+-+-+-+-+ |0|1|2|3|4|5|6|7| (PCIe intc) +-+-+-+-+-+-+-+-+ ^ ^ ^ | | ... | +-------+ +------+ +-----------+ | | | +-+-+---+--+--+ +-+-+---+--+--+ +-+-+---+--+--+ |0|1|...|30|31| |0|1|...|30|31| |0|1|...|30|31| (MSI sets) +-+-+---+--+--+ +-+-+---+--+--+ +-+-+---+--+--+ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ | | | | | | | | | | | | (MSI vectors) | | | | | | | | | | | | (MSI SET0) (MSI SET1) ... (MSI SET7) With 256 MSI vectors supported, the MSI vectors are composed of 8 sets, each set has its own address for MSI message, and supports 32 MSI vectors to generate interrupt. Signed-off-by: Jianjun Wang Acked-by: Ryder Lee --- drivers/pci/controller/pcie-mediatek-gen3.c | 261 ++++++++++++++++++++ 1 file changed, 261 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 7979a2856c35..471d97cd1ef9 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -52,11 +53,28 @@ #define PCIE_LINK_STATUS_REG 0x154 #define PCIE_PORT_LINKUP BIT(8) +#define PCIE_MSI_SET_NUM 8 +#define PCIE_MSI_IRQS_PER_SET 32 +#define PCIE_MSI_IRQS_NUM \ + (PCIE_MSI_IRQS_PER_SET * (PCIE_MSI_SET_NUM)) + #define PCIE_INT_ENABLE_REG 0x180 +#define PCIE_MSI_ENABLE GENMASK(PCIE_MSI_SET_NUM + 8 - 1, 8) +#define PCIE_MSI_SHIFT 8 #define PCIE_INTX_SHIFT 24 #define PCIE_INTX_MASK GENMASK(27, 24) #define PCIE_INT_STATUS_REG 0x184 +#define PCIE_MSI_SET_ENABLE_REG 0x190 +#define PCIE_MSI_SET_ENABLE GENMASK(PCIE_MSI_SET_NUM - 1, 0) + +#define PCIE_MSI_SET_BASE_REG 0xc00 +#define PCIE_MSI_SET_OFFSET 0x10 +#define PCIE_MSI_SET_STATUS_OFFSET 0x04 +#define PCIE_MSI_SET_ENABLE_OFFSET 0x08 + +#define PCIE_MSI_SET_ADDR_HI_BASE 0xc80 +#define PCIE_MSI_SET_ADDR_HI_OFFSET 0x04 #define PCIE_TRANS_TABLE_BASE_REG 0x800 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 @@ -76,6 +94,18 @@ #define PCIE_ATR_TLP_TYPE_MEM PCIE_ATR_TLP_TYPE(0) #define PCIE_ATR_TLP_TYPE_IO PCIE_ATR_TLP_TYPE(2) +/** + * struct mtk_pcie_msi - MSI information for each set + * @dev: pointer to PCIe device + * @base: IO mapped register base + * @msg_addr: MSI message address + */ +struct mtk_msi_set { + struct device *dev; + void __iomem *base; + phys_addr_t msg_addr; +}; + /** * struct mtk_pcie_port - PCIe port information * @dev: pointer to PCIe device @@ -88,6 +118,11 @@ * @num_clks: PCIe clocks count for this port * @irq: PCIe controller interrupt number * @intx_domain: legacy INTx IRQ domain + * @msi_domain: MSI IRQ domain + * @msi_bottom_domain: MSI IRQ bottom domain + * @msi_sets: MSI sets information + * @lock: lock protecting IRQ bit map + * @msi_irq_in_use: bit map for assigned MSI IRQ */ struct mtk_pcie_port { struct device *dev; @@ -101,6 +136,11 @@ struct mtk_pcie_port { int irq; struct irq_domain *intx_domain; + struct irq_domain *msi_domain; + struct irq_domain *msi_bottom_domain; + struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM]; + struct mutex lock; + DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM); }; /** @@ -243,6 +283,15 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port) return err; } + /* Enable MSI */ + val = readl_relaxed(port->base + PCIE_MSI_SET_ENABLE_REG); + val |= PCIE_MSI_SET_ENABLE; + writel_relaxed(val, port->base + PCIE_MSI_SET_ENABLE_REG); + + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); + val |= PCIE_MSI_ENABLE; + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); + /* Set PCIe translation windows */ resource_list_for_each_entry(entry, &host->windows) { struct resource *res = entry->res; @@ -286,6 +335,129 @@ static int mtk_pcie_set_affinity(struct irq_data *data, return -EINVAL; } +static struct irq_chip mtk_msi_irq_chip = { + .name = "MSI", + .irq_ack = irq_chip_ack_parent, +}; + +static struct msi_domain_info mtk_msi_domain_info = { + .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_PCI_MSIX | + MSI_FLAG_USE_DEF_CHIP_OPS | MSI_FLAG_MULTI_PCI_MSI), + .chip = &mtk_msi_irq_chip, +}; + +static void mtk_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) +{ + struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data); + unsigned long hwirq; + + hwirq = data->hwirq % PCIE_MSI_IRQS_PER_SET; + + msg->address_hi = upper_32_bits(msi_set->msg_addr); + msg->address_lo = lower_32_bits(msi_set->msg_addr); + msg->data = hwirq; + dev_dbg(msi_set->dev, "msi#%#lx address_hi %#x address_lo %#x data %d\n", + hwirq, msg->address_hi, msg->address_lo, msg->data); +} + +static void mtk_msi_bottom_irq_ack(struct irq_data *data) +{ + struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data); + unsigned long hwirq; + + hwirq = data->hwirq % PCIE_MSI_IRQS_PER_SET; + + writel_relaxed(BIT(hwirq), msi_set->base + PCIE_MSI_SET_STATUS_OFFSET); +} + +static struct irq_chip mtk_msi_bottom_irq_chip = { + .irq_ack = mtk_msi_bottom_irq_ack, + .irq_compose_msi_msg = mtk_compose_msi_msg, + .irq_set_affinity = mtk_pcie_set_affinity, + .name = "PCIe", +}; + +static int mtk_msi_bottom_domain_alloc(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs, + void *arg) +{ + struct mtk_pcie_port *port = domain->host_data; + struct mtk_msi_set *msi_set; + int i, hwirq, set_idx; + + mutex_lock(&port->lock); + + hwirq = bitmap_find_free_region(port->msi_irq_in_use, PCIE_MSI_IRQS_NUM, + order_base_2(nr_irqs)); + + mutex_unlock(&port->lock); + + if (hwirq < 0) + return -ENOSPC; + + set_idx = hwirq / PCIE_MSI_IRQS_PER_SET; + msi_set = &port->msi_sets[set_idx]; + + for (i = 0; i < nr_irqs; i++) + irq_domain_set_info(domain, virq + i, hwirq + i, + &mtk_msi_bottom_irq_chip, msi_set, + handle_edge_irq, NULL, NULL); + + return 0; +} + +static void mtk_msi_bottom_domain_free(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs) +{ + struct mtk_pcie_port *port = domain->host_data; + struct irq_data *data = irq_domain_get_irq_data(domain, virq); + + mutex_lock(&port->lock); + + bitmap_clear(port->msi_irq_in_use, data->hwirq, nr_irqs); + + mutex_unlock(&port->lock); + + irq_domain_free_irqs_common(domain, virq, nr_irqs); +} + +static int mtk_msi_bottom_domain_activate(struct irq_domain *domain, + struct irq_data *data, bool reserve) +{ + struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data); + unsigned long hwirq; + u32 val; + + hwirq = data->hwirq % PCIE_MSI_IRQS_PER_SET; + + val = readl_relaxed(msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET); + val |= BIT(hwirq); + writel_relaxed(val, msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET); + + return 0; +} + +static void mtk_msi_bottom_domain_deactivate(struct irq_domain *domain, + struct irq_data *data) +{ + struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data); + unsigned long hwirq; + u32 val; + + hwirq = data->hwirq % PCIE_MSI_IRQS_PER_SET; + + val = readl_relaxed(msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET); + val &= ~BIT(hwirq); + writel_relaxed(val, msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET); +} + +static const struct irq_domain_ops mtk_msi_bottom_domain_ops = { + .alloc = mtk_msi_bottom_domain_alloc, + .free = mtk_msi_bottom_domain_free, + .activate = mtk_msi_bottom_domain_activate, + .deactivate = mtk_msi_bottom_domain_deactivate, +}; + static void mtk_intx_mask(struct irq_data *data) { struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); @@ -350,6 +522,9 @@ static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port, { struct device *dev = port->dev; struct device_node *intc_node; + struct fwnode_handle *fwnode = of_node_to_fwnode(node); + struct msi_domain_info *info; + int i, ret; /* Setup INTx */ intc_node = of_get_child_by_name(node, "interrupt-controller"); @@ -365,7 +540,57 @@ static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port, return -ENODEV; } + /* Setup MSI */ + mutex_init(&port->lock); + + port->msi_bottom_domain = irq_domain_add_linear(node, PCIE_MSI_IRQS_NUM, + &mtk_msi_bottom_domain_ops, port); + if (!port->msi_bottom_domain) { + dev_info(dev, "failed to create MSI bottom domain\n"); + ret = -ENODEV; + goto err_msi_bottom_domain; + } + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) { + ret = -ENOMEM; + goto err_msi_bottom_domain; + } + + memcpy(info, &mtk_msi_domain_info, sizeof(*info)); + info->chip_data = port; + + port->msi_domain = pci_msi_create_irq_domain(fwnode, info, + port->msi_bottom_domain); + if (!port->msi_domain) { + dev_info(dev, "failed to create MSI domain\n"); + ret = -ENODEV; + goto err_msi_domain; + } + + for (i = 0; i < PCIE_MSI_SET_NUM; i++) { + struct mtk_msi_set *msi_set = &port->msi_sets[i]; + + msi_set->dev = port->dev; + msi_set->base = port->base + PCIE_MSI_SET_BASE_REG + + i * PCIE_MSI_SET_OFFSET; + msi_set->msg_addr = port->reg_base + PCIE_MSI_SET_BASE_REG + + i * PCIE_MSI_SET_OFFSET; + + writel_relaxed(lower_32_bits(msi_set->msg_addr), msi_set->base); + writel_relaxed(upper_32_bits(msi_set->msg_addr), + port->base + PCIE_MSI_SET_ADDR_HI_BASE + + i * PCIE_MSI_SET_ADDR_HI_OFFSET); + } + return 0; + +err_msi_domain: + irq_domain_remove(port->msi_bottom_domain); +err_msi_bottom_domain: + irq_domain_remove(port->intx_domain); + + return ret; } static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port) @@ -375,9 +600,34 @@ static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port) if (port->intx_domain) irq_domain_remove(port->intx_domain); + if (port->msi_domain) + irq_domain_remove(port->msi_domain); + + if (port->msi_bottom_domain) + irq_domain_remove(port->msi_bottom_domain); + irq_dispose_mapping(port->irq); } +static void mtk_pcie_msi_handler(struct mtk_pcie_port *port, int set_idx) +{ + struct mtk_msi_set *msi_set = &port->msi_sets[set_idx]; + unsigned long msi_enable, msi_status; + unsigned int virq; + irq_hw_number_t bit, hwirq; + + msi_enable = readl_relaxed(msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET); + while ((msi_status = + readl_relaxed(msi_set->base + PCIE_MSI_SET_STATUS_OFFSET) & + msi_enable)) { + for_each_set_bit(bit, &msi_status, PCIE_MSI_IRQS_PER_SET) { + hwirq = bit + set_idx * PCIE_MSI_IRQS_PER_SET; + virq = irq_find_mapping(port->msi_bottom_domain, hwirq); + generic_handle_irq(virq); + } + } +} + static void mtk_pcie_irq_handler(struct irq_desc *desc) { struct mtk_pcie_port *port = irq_desc_get_handler_data(desc); @@ -398,6 +648,17 @@ static void mtk_pcie_irq_handler(struct irq_desc *desc) } } + if (status & PCIE_MSI_ENABLE) { + irq_bit = PCIE_MSI_SHIFT; + for_each_set_bit_from(irq_bit, &status, PCIE_MSI_SET_NUM + + PCIE_MSI_SHIFT) { + mtk_pcie_msi_handler(port, irq_bit - PCIE_MSI_SHIFT); + + writel_relaxed(BIT(irq_bit), + port->base + PCIE_INT_STATUS_REG); + } + } + chained_irq_exit(irqchip, desc); } From patchwork Wed Jan 13 11:40:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425775 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5Bz0XDrz9sVb for ; Wed, 13 Jan 2021 22:42:03 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726732AbhAMLl7 (ORCPT ); Wed, 13 Jan 2021 06:41:59 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:60713 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725998AbhAMLl6 (ORCPT ); Wed, 13 Jan 2021 06:41:58 -0500 X-UUID: 2d0d86c6fcac48a0877b24c1d8e95cc3-20210113 X-UUID: 2d0d86c6fcac48a0877b24c1d8e95cc3-20210113 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 55072910; Wed, 13 Jan 2021 19:41:01 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:40:59 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:58 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,6/7] PCI: mediatek-gen3: Add system PM support Date: Wed, 13 Jan 2021 19:40:00 +0800 Message-ID: <20210113114001.5804-7-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add suspend_noirq and resume_noirq callback functions to implement PM system suspend hooks for MediaTek Gen3 PCIe controller. When system suspend, trigger the PCIe link to L2 state and pull down the PERST# pin, gating the clocks of MAC layer and power off the physical layer for the sake of power saving. When system resum, the PCIe link should be re-established and the related control register values should be restored. Signed-off-by: Jianjun Wang Acked-by: Ryder Lee --- drivers/pci/controller/pcie-mediatek-gen3.c | 78 +++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 152820f28da1..ac6c43cea575 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -49,6 +49,9 @@ #define PCIE_PE_RSTB BIT(3) #define PCIE_LTSSM_STATUS_REG 0x150 +#define PCIE_LTSSM_STATE_MASK GENMASK(28, 24) +#define PCIE_LTSSM_STATE(val) ((val & PCIE_LTSSM_STATE_MASK) >> 24) +#define PCIE_LTSSM_STATE_L2_IDLE 0x14 #define PCIE_LINK_STATUS_REG 0x154 #define PCIE_PORT_LINKUP BIT(8) @@ -76,6 +79,9 @@ #define PCIE_MSI_SET_ADDR_HI_BASE 0xc80 #define PCIE_MSI_SET_ADDR_HI_OFFSET 0x04 +#define PCIE_ICMD_PM_REG 0x198 +#define PCIE_TURN_OFF_LINK BIT(4) + #define PCIE_TRANS_TABLE_BASE_REG 0x800 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8 @@ -869,6 +875,77 @@ static int mtk_pcie_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused mtk_pcie_turn_off_link(struct mtk_pcie_port *port) +{ + u32 val; + + val = readl_relaxed(port->base + PCIE_ICMD_PM_REG); + val |= PCIE_TURN_OFF_LINK; + writel_relaxed(val, port->base + PCIE_ICMD_PM_REG); + + /* Check the link is L2 */ + return readl_poll_timeout(port->base + PCIE_LTSSM_STATUS_REG, val, + (PCIE_LTSSM_STATE(val) == + PCIE_LTSSM_STATE_L2_IDLE), 20, + 50 * USEC_PER_MSEC); +} + +static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) +{ + struct mtk_pcie_port *port = dev_get_drvdata(dev); + int err; + u32 val; + + /* Trigger link to L2 state */ + err = mtk_pcie_turn_off_link(port); + if (err) { + dev_err(port->dev, "can not enter L2 state\n"); + return err; + } + + /* Pull down the PERST# pin */ + val = readl_relaxed(port->base + PCIE_RST_CTRL_REG); + val |= PCIE_PE_RSTB; + writel_relaxed(val, port->base + PCIE_RST_CTRL_REG); + + dev_dbg(port->dev, "enter L2 state success"); + + clk_bulk_disable_unprepare(port->num_clks, port->clks); + + phy_power_off(port->phy); + + return 0; +} + +static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) +{ + struct mtk_pcie_port *port = dev_get_drvdata(dev); + int err; + + phy_power_on(port->phy); + + err = clk_bulk_prepare_enable(port->num_clks, port->clks); + if (err) { + dev_dbg(dev, "failed to enable PCIe clocks\n"); + return err; + } + + err = mtk_pcie_startup_port(port); + if (err) { + dev_err(port->dev, "resume failed\n"); + return err; + } + + dev_dbg(port->dev, "resume done\n"); + + return 0; +} + +static const struct dev_pm_ops mtk_pcie_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, + mtk_pcie_resume_noirq) +}; + static const struct of_device_id mtk_pcie_of_match[] = { { .compatible = "mediatek,mt8192-pcie" }, {}, @@ -880,6 +957,7 @@ static struct platform_driver mtk_pcie_driver = { .driver = { .name = "mtk-pcie", .of_match_table = mtk_pcie_of_match, + .pm = &mtk_pcie_pm_ops, }, }; From patchwork Wed Jan 13 11:40:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Smlhbmp1biBXYW5nICjnjovlu7rlhpsp?= X-Patchwork-Id: 1425776 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DG5CV1jQpz9sSC for ; Wed, 13 Jan 2021 22:42:30 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726790AbhAMLmC (ORCPT ); Wed, 13 Jan 2021 06:42:02 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:34849 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726657AbhAMLl7 (ORCPT ); Wed, 13 Jan 2021 06:41:59 -0500 X-UUID: a423613a6b9f4d8fa9ce5db31ede0cf0-20210113 X-UUID: a423613a6b9f4d8fa9ce5db31ede0cf0-20210113 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 829334068; Wed, 13 Jan 2021 19:41:02 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 13 Jan 2021 19:41:01 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 13 Jan 2021 19:40:59 +0800 From: Jianjun Wang To: Bjorn Helgaas , Rob Herring , , Lorenzo Pieralisi , Ryder Lee CC: Philipp Zabel , Matthias Brugger , , , , , , Sj Huang , Jianjun Wang , , , , , , , Subject: [v7,7/7] MAINTAINERS: Add Jianjun Wang as MediaTek PCI co-maintainer Date: Wed, 13 Jan 2021 19:40:01 +0800 Message-ID: <20210113114001.5804-8-jianjun.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210113114001.5804-1-jianjun.wang@mediatek.com> References: <20210113114001.5804-1-jianjun.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Update entry for MediaTek PCIe controller, add Jianjun Wang as MediaTek PCI co-maintainer. Signed-off-by: Jianjun Wang Acked-by: Ryder Lee --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index e73636b75f29..1a033812c7f9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13622,6 +13622,7 @@ F: drivers/pci/controller/dwc/pcie-histb.c PCIE DRIVER FOR MEDIATEK M: Ryder Lee +M: Jianjun Wang L: linux-pci@vger.kernel.org L: linux-mediatek@lists.infradead.org S: Supported