From patchwork Sat May 15 12:40:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 1478888 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; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=Ac5+khIW; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fj4kq67Mrz9sWP for ; Sat, 15 May 2021 22:41:07 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232164AbhEOMmP (ORCPT ); Sat, 15 May 2021 08:42:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230004AbhEOMmP (ORCPT ); Sat, 15 May 2021 08:42:15 -0400 Received: from mail-wr1-x42e.google.com (mail-wr1-x42e.google.com [IPv6:2a00:1450:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78B48C06174A; Sat, 15 May 2021 05:41:00 -0700 (PDT) Received: by mail-wr1-x42e.google.com with SMTP id j14so25607wrq.5; Sat, 15 May 2021 05:41:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=29hFlM7+Y+uwzh88wBHQABcMU9Oyv+iMTUv6Oz1e+Lw=; b=Ac5+khIWLkEmDqtXwGl0zLNE8t3eV0qwHWKAsX3AUELcoxHWKiD6e0slrwZPZUxsm/ bATfNAltMBYtoEaggzCJs50QmDFDXs7M5OnUIXH7LhLwDJmhbLXGEH5BFieLSngBGgpp 20UYgdGxeeN/uE9juT2SykeGNCGK8+vDyEh1UVhAjA6ixzPb+lQrzMOCPzxQuOcIGa4Z UMghJbSpk7ihxxJbgVkNk9TkAlgaeKnbarPnpL/NKpVe7+8xEiosRd4LrzKkUdtPcAEd K8ijuMtCCchgB7AkHezvDBUoIrM0grf6i19XJ2M8b+6olj7w6jpg31qAwB6NEIma0m2O pXpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=29hFlM7+Y+uwzh88wBHQABcMU9Oyv+iMTUv6Oz1e+Lw=; b=QYLHbByHUhkh81aoNGETibgX4wGm19rzlZJv4vKj3EQiyRMYN4N2PPir0L/wH5IZji ifNBCtX/0xuyKgOZpu+Xbuf9/6t7EjT/HJn2DTA2dPE+vfpQLvIWOMHJ/pWS5us4BR0G 4B7d7HGXikCja+FpGBsNSKzM+DNFP4VRwAn5GMRQazFWNcnbM3yCGuyq7OOuFX/F4Adf JU7c7ITluDFdFHKlVpEvqPPphxvpp7XACF1jzaia/g6io5iFs8GxuWk2LPi4HHOaB8SF yyAP6vZ1Xw2KRtD27NQyCkDzLtncFIOIpYHHU6vWrBMrCeD2qDgu17lrTJaImZU9AwOw rYBg== X-Gm-Message-State: AOAM530SGHnQB+mIqQ8z4kYahxw/juLJHYkQsRvkaWrFkpiR61GVQ/Wt Fs3l65GHXkPgfYwPCXPJg+xNWPEqjO0UCMB6 X-Google-Smtp-Source: ABdhPJw73ij0S25x2szSZPCsPa+9Q/ZqkLlIxEGzrghb6i9sMblc8N+o5DBjCk7+Qus5m5ryEoxgig== X-Received: by 2002:adf:f109:: with SMTP id r9mr6748436wro.251.1621082458973; Sat, 15 May 2021 05:40:58 -0700 (PDT) Received: from localhost.localdomain (29.red-83-49-33.dynamicip.rima-tde.net. [83.49.33.29]) by smtp.gmail.com with ESMTPSA id w7sm9472749wru.51.2021.05.15.05.40.57 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 May 2021 05:40:58 -0700 (PDT) From: Sergio Paracuellos To: linux-mips@vger.kernel.org Cc: tsbogend@alpha.franken.de, devicetree@vger.kernel.org, matthias.bgg@gmail.com, john@phrozen.org, bhelgaas@google.com, robh+dt@kernel.org, linux-staging@lists.linux.dev, gregkh@linuxfoundation.org, neil@brown.name, ilya.lipnitskiy@gmail.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 1/4] dt-bindings: mt7621-pci: PCIe binding documentation for MT7621 SoCs Date: Sat, 15 May 2021 14:40:52 +0200 Message-Id: <20210515124055.22225-2-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210515124055.22225-1-sergio.paracuellos@gmail.com> References: <20210515124055.22225-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add device tree binding documentation for PCIe in MT7621 SoCs. Signed-off-by: Sergio Paracuellos --- .../bindings/pci/mediatek,mt7621-pci.yaml | 149 ++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/mediatek,mt7621-pci.yaml diff --git a/Documentation/devicetree/bindings/pci/mediatek,mt7621-pci.yaml b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pci.yaml new file mode 100644 index 000000000000..7f5f9d583032 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pci.yaml @@ -0,0 +1,149 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/mediatek,mt7621-pci.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek MT7621 PCIe controller + +maintainers: + - Sergio Paracuellos + +description: |+ + MediaTek MT7621 PCIe subsys supports single Root complex (RC) + with 3 Root Ports. Each Root Ports supports a Gen1 1-lane Link + +allOf: + - $ref: /schemas/pci/pci-bus.yaml# + +properties: + compatible: + const: mediatek,mt7621-pci + + reg: + items: + - description: host-pci bridge registers + - description: pcie port 0 RC control registers + - description: pcie port 1 RC control registers + - description: pcie port 2 RC control registers + + ranges: + maxItems: 2 + + resets: + items: + - description: pcie port 0 reset. + - description: pcie port 1 reset. + - description: pcie port 2 reset. + + reset-names: + items: + - const: pcie0 + - const: pcie1 + - const: pcie2 + + clocks: + items: + - description: pcie port 0 clock. + - description: pcie port 1 clock. + - description: pcie port 2 clock. + + clock-names: + items: + - const: pcie0 + - const: pcie1 + - const: pcie2 + + phys: + items: + - description: Dual-ported phy for pcie port 0 and 1. + - description: Phy for pcie port 2. + + phy-names: + items: + - const: pcie-phy0 + - const: pcie-phy2 + +required: + - compatible + - reg + - ranges + - "#interrupt-cells" + - interrupt-map-mask + - interrupt-map + - resets + - reset-names + - clocks + - clock-names + - phys + - phy-names + - reset-gpios + +unevaluatedProperties: false + +examples: + - | + #include + #include + + pcie: pcie@1e140000 { + compatible = "mediatek,mt7621-pci"; + reg = <0x1e140000 0x100>, + <0x1e142000 0x100>, + <0x1e143000 0x100>, + <0x1e144000 0x100>; + + #address-cells = <3>; + #size-cells = <2>; + pinctrl-names = "default"; + pinctrl-0 = <&pcie_pins>; + device_type = "pci"; + ranges = <0x02000000 0 0x00000000 0x60000000 0 0x10000000>, /* pci memory */ + <0x01000000 0 0x00000000 0x1e160000 0 0x00010000>; /* io space */ + #interrupt-cells = <1>; + interrupt-map-mask = <0xF800 0 0 0>; + interrupt-map = <0x0000 0 0 0 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>, + <0x0800 0 0 0 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>, + <0x1000 0 0 0 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>; + resets = <&rstctrl 24>, <&rstctrl 25>, <&rstctrl 26>; + reset-names = "pcie0", "pcie1", "pcie2"; + clocks = <&clkctrl 24>, <&clkctrl 25>, <&clkctrl 26>; + clock-names = "pcie0", "pcie1", "pcie2"; + phys = <&pcie0_phy 1>, <&pcie2_phy 0>; + phy-names = "pcie-phy0", "pcie-phy2"; + reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>; + + pcie@0,0 { + reg = <0x0000 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0 0 0 0 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>; + ranges; + }; + + pcie@1,0 { + reg = <0x0800 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0 0 0 0 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>; + ranges; + }; + + pcie@2,0 { + reg = <0x1000 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0 0 0 0 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>; + ranges; + }; + }; +... From patchwork Sat May 15 12:40:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 1478893 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; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=IU6qD7H3; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fj4kt0yscz9sWM for ; Sat, 15 May 2021 22:41:10 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232300AbhEOMmR (ORCPT ); Sat, 15 May 2021 08:42:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232177AbhEOMmP (ORCPT ); Sat, 15 May 2021 08:42:15 -0400 Received: from mail-wr1-x42e.google.com (mail-wr1-x42e.google.com [IPv6:2a00:1450:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBD7BC061756; Sat, 15 May 2021 05:41:01 -0700 (PDT) Received: by mail-wr1-x42e.google.com with SMTP id h4so1729546wrt.12; Sat, 15 May 2021 05:41:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=/YN9Prua/v4Pq8dB6+y3EI7zCqnxqMY4F3yNtP6TjMo=; b=IU6qD7H3N7SLB8kBYoOcCMg0SAQv0V43V7ijtjwJpgMB7M6tOAMSt7LncsUqn+clOI szxy7D58B6Uudd9eZ2wp2XmOB6sa9/bJkyUYCg2xJjN6WFCzbtYar/p0UKB6k8jyVeV/ l4jF1bxwcbx81drLdNkLOjXz+vH8wkgX/6ax6ALeJUKogvXlvuqENQdplRmgc3QqN4bG dbhDeoXATqIUPAHKXEI7h1cJCq1qdYy3etK3pLrur0efw4w5YEJnrn/7nmxJ2WaP4v3B gph6PcbgNd3EULv6gIgeYTgssP5WwvjrrU2dka58pzrjWU2h8gMON+tsdzOBOGXwhbFT JV0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=/YN9Prua/v4Pq8dB6+y3EI7zCqnxqMY4F3yNtP6TjMo=; b=Dpovt5tjXwe9aGQK4HvMI3C6C3OUF7UmtoVlh5MZiigNjDuNLkdY5i2xbcX8KhwYHM aGHqK0ydnWxdzLap9ybsdB1HOJSoZexu0Er54iABj2vpyqvrBAXwzWNNTH2zw735QNhh S65K+IcCE0wwfTGMmQDSZ0l/yI385DPjGxGl3qwLiBt4aEbr8prO1f40o6S4lFiDaAzs mPLPwoGN9G6Wg/IkzBKVPAcO+q9Q6Fw6c9E5UBhYCBS7nBipU7tzbrIpIqrFf0XT+vmu sksu0DrBTh6YAoef5V7J5Op2l/+BhzX4dJf4tWW+pY0hxCHMTm08n6lPWs7YbarZNW2D 5FNA== X-Gm-Message-State: AOAM5306JeyD/lyyw/HT04FR0FQWvCm1dx4BSio7MYaFqia7upIUyhUY pfPeO6/LldAblYWZ3ddntD9oyh1GxVAiOgFV X-Google-Smtp-Source: ABdhPJzfhst4OOJcrAE9wFeftDEPFyg4mfrAFhzNQgt0O08EOSNMDGdfxHRk0KbP33Y06/SzjlfZlQ== X-Received: by 2002:adf:d4c7:: with SMTP id w7mr4142854wrk.35.1621082460041; Sat, 15 May 2021 05:41:00 -0700 (PDT) Received: from localhost.localdomain (29.red-83-49-33.dynamicip.rima-tde.net. [83.49.33.29]) by smtp.gmail.com with ESMTPSA id w7sm9472749wru.51.2021.05.15.05.40.59 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 May 2021 05:40:59 -0700 (PDT) From: Sergio Paracuellos To: linux-mips@vger.kernel.org Cc: tsbogend@alpha.franken.de, devicetree@vger.kernel.org, matthias.bgg@gmail.com, john@phrozen.org, bhelgaas@google.com, robh+dt@kernel.org, linux-staging@lists.linux.dev, gregkh@linuxfoundation.org, neil@brown.name, ilya.lipnitskiy@gmail.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 2/4] MIPS: pci: Add driver for MT7621 PCIe controller Date: Sat, 15 May 2021 14:40:53 +0200 Message-Id: <20210515124055.22225-3-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210515124055.22225-1-sergio.paracuellos@gmail.com> References: <20210515124055.22225-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This patch adds a driver for the PCIe controller of MT7621 SoC. Signed-off-by: Sergio Paracuellos --- arch/mips/pci/Makefile | 1 + arch/mips/pci/pci-mt7621.c | 624 +++++++++++++++++++++++++++++++++++++ arch/mips/ralink/Kconfig | 9 +- 3 files changed, 633 insertions(+), 1 deletion(-) create mode 100644 arch/mips/pci/pci-mt7621.c diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile index f3eecc065e5c..178c550739c4 100644 --- a/arch/mips/pci/Makefile +++ b/arch/mips/pci/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_PCI_AR2315) += pci-ar2315.o obj-$(CONFIG_SOC_AR71XX) += pci-ar71xx.o obj-$(CONFIG_PCI_AR724X) += pci-ar724x.o obj-$(CONFIG_PCI_XTALK_BRIDGE) += pci-xtalk-bridge.o +obj-$(CONFIG_PCI_MT7621) += pci-mt7621.o # # These are still pretty much in the old state, watch, go blind. # diff --git a/arch/mips/pci/pci-mt7621.c b/arch/mips/pci/pci-mt7621.c new file mode 100644 index 000000000000..fe1945819d25 --- /dev/null +++ b/arch/mips/pci/pci-mt7621.c @@ -0,0 +1,624 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * BRIEF MODULE DESCRIPTION + * PCI init for Ralink RT2880 solution + * + * Copyright 2007 Ralink Inc. (bruce_chang@ralinktech.com.tw) + * + * May 2007 Bruce Chang + * Initial Release + * + * May 2009 Bruce Chang + * support RT2880/RT3883 PCIe + * + * May 2011 Bruce Chang + * support RT6855/MT7620 PCIe + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* MediaTek specific configuration registers */ +#define PCIE_FTS_NUM 0x70c +#define PCIE_FTS_NUM_MASK GENMASK(15, 8) +#define PCIE_FTS_NUM_L0(x) (((x) & 0xff) << 8) + +/* Host-PCI bridge registers */ +#define RALINK_PCI_PCICFG_ADDR 0x0000 +#define RALINK_PCI_PCIMSK_ADDR 0x000C +#define RALINK_PCI_CONFIG_ADDR 0x0020 +#define RALINK_PCI_CONFIG_DATA 0x0024 +#define RALINK_PCI_MEMBASE 0x0028 +#define RALINK_PCI_IOBASE 0x002C + +/* PCIe RC control registers */ +#define MT7621_PCIE_OFFSET 0x2000 +#define MT7621_NEXT_PORT 0x1000 + +#define RALINK_PCI_BAR0SETUP_ADDR 0x0010 +#define RALINK_PCI_ID 0x0030 +#define RALINK_PCI_CLASS 0x0034 +#define RALINK_PCI_SUBID 0x0038 +#define RALINK_PCI_STATUS 0x0050 + +/* Some definition values */ +#define PCIE_REVISION_ID BIT(0) +#define PCIE_CLASS_CODE (0x60400 << 8) +#define PCIE_BAR_MAP_MAX GENMASK(30, 16) +#define PCIE_BAR_ENABLE BIT(0) +#define PCIE_PORT_INT_EN(x) BIT(20 + (x)) +#define PCIE_PORT_LINKUP BIT(0) + +#define PERST_DELAY_MS 100 + +/** + * struct mt7621_pcie_port - PCIe port information + * @base: I/O mapped register base + * @list: port list + * @pcie: pointer to PCIe host info + * @clk: pointer to the port clock gate + * @phy: pointer to PHY control block + * @pcie_rst: pointer to port reset control + * @gpio_rst: gpio reset + * @slot: port slot + * @enabled: indicates if port is enabled + */ +struct mt7621_pcie_port { + void __iomem *base; + struct list_head list; + struct mt7621_pcie *pcie; + struct clk *clk; + struct phy *phy; + struct reset_control *pcie_rst; + struct gpio_desc *gpio_rst; + u32 slot; + bool enabled; +}; + +/** + * struct mt7621_pcie - PCIe host information + * @base: IO Mapped Register Base + * @io: IO resource + * @mem: pointer to non-prefetchable memory resource + * @dev: Pointer to PCIe device + * @io_map_base: virtual memory base address for io + * @ports: pointer to PCIe port information + * @resets_inverted: depends on chip revision + * reset lines are inverted. + */ +struct mt7621_pcie { + void __iomem *base; + struct device *dev; + struct resource io; + struct resource *mem; + unsigned long io_map_base; + struct list_head ports; + bool resets_inverted; +}; + +static inline u32 pcie_read(struct mt7621_pcie *pcie, u32 reg) +{ + return readl(pcie->base + reg); +} + +static inline void pcie_write(struct mt7621_pcie *pcie, u32 val, u32 reg) +{ + writel(val, pcie->base + reg); +} + +static inline void pcie_rmw(struct mt7621_pcie *pcie, u32 reg, u32 clr, u32 set) +{ + u32 val = readl(pcie->base + reg); + + val &= ~clr; + val |= set; + writel(val, pcie->base + reg); +} + +static inline u32 pcie_port_read(struct mt7621_pcie_port *port, u32 reg) +{ + return readl(port->base + reg); +} + +static inline void pcie_port_write(struct mt7621_pcie_port *port, + u32 val, u32 reg) +{ + writel(val, port->base + reg); +} + +static inline u32 mt7621_pci_get_cfgaddr(unsigned int bus, unsigned int slot, + unsigned int func, unsigned int where) +{ + return (((where & 0xF00) >> 8) << 24) | (bus << 16) | (slot << 11) | + (func << 8) | (where & 0xfc) | 0x80000000; +} + +static void __iomem *mt7621_pcie_map_bus(struct pci_bus *bus, + unsigned int devfn, int where) +{ + struct mt7621_pcie *pcie = bus->sysdata; + u32 address = mt7621_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), + PCI_FUNC(devfn), where); + + writel(address, pcie->base + RALINK_PCI_CONFIG_ADDR); + + return pcie->base + RALINK_PCI_CONFIG_DATA + (where & 3); +} + +struct pci_ops mt7621_pci_ops = { + .map_bus = mt7621_pcie_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, +}; + +static u32 read_config(struct mt7621_pcie *pcie, unsigned int dev, u32 reg) +{ + u32 address = mt7621_pci_get_cfgaddr(0, dev, 0, reg); + + pcie_write(pcie, address, RALINK_PCI_CONFIG_ADDR); + return pcie_read(pcie, RALINK_PCI_CONFIG_DATA); +} + +static void write_config(struct mt7621_pcie *pcie, unsigned int dev, + u32 reg, u32 val) +{ + u32 address = mt7621_pci_get_cfgaddr(0, dev, 0, reg); + + pcie_write(pcie, address, RALINK_PCI_CONFIG_ADDR); + pcie_write(pcie, val, RALINK_PCI_CONFIG_DATA); +} + +static inline void mt7621_rst_gpio_pcie_assert(struct mt7621_pcie_port *port) +{ + if (port->gpio_rst) + gpiod_set_value(port->gpio_rst, 1); +} + +static inline void mt7621_rst_gpio_pcie_deassert(struct mt7621_pcie_port *port) +{ + if (port->gpio_rst) + gpiod_set_value(port->gpio_rst, 0); +} + +static inline bool mt7621_pcie_port_is_linkup(struct mt7621_pcie_port *port) +{ + return (pcie_port_read(port, RALINK_PCI_STATUS) & PCIE_PORT_LINKUP) != 0; +} + +static inline void mt7621_control_assert(struct mt7621_pcie_port *port) +{ + struct mt7621_pcie *pcie = port->pcie; + + if (pcie->resets_inverted) + reset_control_assert(port->pcie_rst); + else + reset_control_deassert(port->pcie_rst); +} + +static inline void mt7621_control_deassert(struct mt7621_pcie_port *port) +{ + struct mt7621_pcie *pcie = port->pcie; + + if (pcie->resets_inverted) + reset_control_deassert(port->pcie_rst); + else + reset_control_assert(port->pcie_rst); +} + +static void setup_cm_memory_region(struct mt7621_pcie *pcie) +{ + struct resource *mem_resource = pcie->mem; + struct device *dev = pcie->dev; + resource_size_t mask; + + if (mips_cps_numiocu(0)) { + /* + * FIXME: hardware doesn't accept mask values with 1s after + * 0s (e.g. 0xffef), so it would be great to warn if that's + * about to happen + */ + mask = ~(mem_resource->end - mem_resource->start); + + write_gcr_reg1_base(mem_resource->start); + write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); + dev_info(dev, "PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", + (unsigned long long)read_gcr_reg1_base(), + (unsigned long long)read_gcr_reg1_mask()); + } +} + +static int mt7621_pci_parse_request_of_pci_ranges(struct pci_host_bridge *host) +{ + struct mt7621_pcie *pcie = pci_host_bridge_priv(host); + struct device *dev = pcie->dev; + struct device_node *node = dev->of_node; + struct of_pci_range_parser parser; + struct resource_entry *entry; + struct of_pci_range range; + LIST_HEAD(res); + + if (of_pci_range_parser_init(&parser, node)) { + dev_err(dev, "missing \"ranges\" property\n"); + return -EINVAL; + } + + /* + * IO_SPACE_LIMIT for MIPS is 0xffff but this platform uses IO at + * upper address 0x001e160000. of_pci_range_to_resource does not work + * well for MIPS platforms that don't define PCI_IOBASE, so set the IO + * resource manually instead. + */ + for_each_of_pci_range(&parser, &range) { + switch (range.flags & IORESOURCE_TYPE_BITS) { + case IORESOURCE_IO: + pcie->io_map_base = + (unsigned long)ioremap(range.cpu_addr, + range.size); + pcie->io.name = node->full_name; + pcie->io.flags = range.flags; + pcie->io.start = range.cpu_addr; + pcie->io.end = range.cpu_addr + range.size - 1; + pcie->io.parent = pcie->io.child = pcie->io.sibling = NULL; + set_io_port_base(pcie->io_map_base); + break; + } + } + + entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); + if (!entry) { + dev_err(dev, "Cannot get memory resource"); + return -EINVAL; + } + + pcie->mem = entry->res; + pci_add_resource(&res, &pcie->io); + pci_add_resource(&res, entry->res); + list_splice_init(&res, &host->windows); + + return 0; +} + +static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie, + int slot) +{ + struct mt7621_pcie_port *port; + struct device *dev = pcie->dev; + struct platform_device *pdev = to_platform_device(dev); + char name[10]; + + port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); + if (!port) + return -ENOMEM; + + port->base = devm_platform_ioremap_resource(pdev, slot + 1); + if (IS_ERR(port->base)) + return PTR_ERR(port->base); + + snprintf(name, sizeof(name), "pcie%d", slot); + port->clk = devm_clk_get(dev, name); + if (IS_ERR(port->clk)) { + dev_err(dev, "failed to get pcie%d clock\n", slot); + return PTR_ERR(port->clk); + } + + snprintf(name, sizeof(name), "pcie%d", slot); + port->pcie_rst = devm_reset_control_get_exclusive(dev, name); + if (PTR_ERR(port->pcie_rst) == -EPROBE_DEFER) { + dev_err(dev, "failed to get pcie%d reset control\n", slot); + return PTR_ERR(port->pcie_rst); + } + + snprintf(name, sizeof(name), "pcie-phy%d", slot); + port->phy = devm_phy_get(dev, name); + if (IS_ERR(port->phy) && slot != 1) + return PTR_ERR(port->phy); + + port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot, + GPIOD_OUT_LOW); + if (IS_ERR(port->gpio_rst)) { + dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot); + return PTR_ERR(port->gpio_rst); + } + + port->slot = slot; + port->pcie = pcie; + + INIT_LIST_HEAD(&port->list); + list_add_tail(&port->list, &pcie->ports); + + return 0; +} + +static int mt7621_pcie_parse_dt(struct mt7621_pcie *pcie) +{ + struct device *dev = pcie->dev; + struct platform_device *pdev = to_platform_device(dev); + struct device_node *node = dev->of_node, *child; + int err; + + pcie->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pcie->base)) + return PTR_ERR(pcie->base); + + for_each_available_child_of_node(node, child) { + int slot; + + err = of_pci_get_devfn(child); + if (err < 0) { + of_node_put(child); + dev_err(dev, "failed to parse devfn: %d\n", err); + return err; + } + + slot = PCI_SLOT(err); + + err = mt7621_pcie_parse_port(pcie, slot); + if (err) { + of_node_put(child); + return err; + } + } + + return 0; +} + +static int mt7621_pcie_init_port(struct mt7621_pcie_port *port) +{ + struct mt7621_pcie *pcie = port->pcie; + struct device *dev = pcie->dev; + u32 slot = port->slot; + int err; + + err = phy_init(port->phy); + if (err) { + dev_err(dev, "failed to initialize port%d phy\n", slot); + return err; + } + + err = phy_power_on(port->phy); + if (err) { + dev_err(dev, "failed to power on port%d phy\n", slot); + phy_exit(port->phy); + return err; + } + + port->enabled = true; + + return 0; +} + +static void mt7621_pcie_reset_assert(struct mt7621_pcie *pcie) +{ + struct mt7621_pcie_port *port; + + list_for_each_entry(port, &pcie->ports, list) { + /* PCIe RC reset assert */ + mt7621_control_assert(port); + + /* PCIe EP reset assert */ + mt7621_rst_gpio_pcie_assert(port); + } + + msleep(PERST_DELAY_MS); +} + +static void mt7621_pcie_reset_rc_deassert(struct mt7621_pcie *pcie) +{ + struct mt7621_pcie_port *port; + + list_for_each_entry(port, &pcie->ports, list) + mt7621_control_deassert(port); +} + +static void mt7621_pcie_reset_ep_deassert(struct mt7621_pcie *pcie) +{ + struct mt7621_pcie_port *port; + + list_for_each_entry(port, &pcie->ports, list) + mt7621_rst_gpio_pcie_deassert(port); + + msleep(PERST_DELAY_MS); +} + +static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie) +{ + struct device *dev = pcie->dev; + struct mt7621_pcie_port *port, *tmp; + int err; + + mt7621_pcie_reset_assert(pcie); + mt7621_pcie_reset_rc_deassert(pcie); + + list_for_each_entry_safe(port, tmp, &pcie->ports, list) { + u32 slot = port->slot; + + if (slot == 1) { + port->enabled = true; + continue; + } + + err = mt7621_pcie_init_port(port); + if (err) { + dev_err(dev, "Initiating port %d failed\n", slot); + list_del(&port->list); + } + } + + mt7621_pcie_reset_ep_deassert(pcie); + + tmp = NULL; + list_for_each_entry(port, &pcie->ports, list) { + u32 slot = port->slot; + + if (!mt7621_pcie_port_is_linkup(port)) { + dev_err(dev, "pcie%d no card, disable it (RST & CLK)\n", + slot); + mt7621_control_assert(port); + clk_disable_unprepare(port->clk); + port->enabled = false; + + if (slot == 0) { + tmp = port; + continue; + } + + if (slot == 1 && tmp && !tmp->enabled) + phy_power_off(tmp->phy); + } + } +} + +static void mt7621_pcie_enable_port(struct mt7621_pcie_port *port) +{ + struct mt7621_pcie *pcie = port->pcie; + u32 slot = port->slot; + u32 offset = MT7621_PCIE_OFFSET + (slot * MT7621_NEXT_PORT); + u32 val; + + /* enable pcie interrupt */ + val = pcie_read(pcie, RALINK_PCI_PCIMSK_ADDR); + val |= PCIE_PORT_INT_EN(slot); + pcie_write(pcie, val, RALINK_PCI_PCIMSK_ADDR); + + /* map 2G DDR region */ + pcie_write(pcie, PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE, + offset + RALINK_PCI_BAR0SETUP_ADDR); + + /* configure class code and revision ID */ + pcie_write(pcie, PCIE_CLASS_CODE | PCIE_REVISION_ID, + offset + RALINK_PCI_CLASS); +} + +static int mt7621_pcie_enable_ports(struct mt7621_pcie *pcie) +{ + struct device *dev = pcie->dev; + struct mt7621_pcie_port *port; + u8 num_slots_enabled = 0; + u32 slot; + u32 val; + int err; + + /* Setup MEMWIN and IOWIN */ + pcie_write(pcie, 0xffffffff, RALINK_PCI_MEMBASE); + pcie_write(pcie, pcie->io.start, RALINK_PCI_IOBASE); + + list_for_each_entry(port, &pcie->ports, list) { + if (port->enabled) { + err = clk_prepare_enable(port->clk); + if (err) { + dev_err(dev, "enabling clk pcie%d\n", slot); + return err; + } + + mt7621_pcie_enable_port(port); + dev_info(dev, "PCIE%d enabled\n", port->slot); + num_slots_enabled++; + } + } + + for (slot = 0; slot < num_slots_enabled; slot++) { + val = read_config(pcie, slot, PCI_COMMAND); + val |= PCI_COMMAND_MASTER; + write_config(pcie, slot, PCI_COMMAND, val); + /* configure RC FTS number to 250 when it leaves L0s */ + val = read_config(pcie, slot, PCIE_FTS_NUM); + val &= ~PCIE_FTS_NUM_MASK; + val |= PCIE_FTS_NUM_L0(0x50); + write_config(pcie, slot, PCIE_FTS_NUM, val); + } + + return 0; +} + +static int mt7621_pcie_register_host(struct pci_host_bridge *host) +{ + struct mt7621_pcie *pcie = pci_host_bridge_priv(host); + + host->ops = &mt7621_pci_ops; + host->sysdata = pcie; + return pci_host_probe(host); +} + +static const struct soc_device_attribute mt7621_pci_quirks_match[] = { + { .soc_id = "mt7621", .revision = "E2" } +}; + +static int mt7621_pci_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct soc_device_attribute *attr; + struct mt7621_pcie *pcie; + struct pci_host_bridge *bridge; + int err; + + if (!dev->of_node) + return -ENODEV; + + bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); + if (!bridge) + return -ENOMEM; + + pcie = pci_host_bridge_priv(bridge); + pcie->dev = dev; + platform_set_drvdata(pdev, pcie); + INIT_LIST_HEAD(&pcie->ports); + + attr = soc_device_match(mt7621_pci_quirks_match); + if (attr) + pcie->resets_inverted = true; + + err = mt7621_pcie_parse_dt(pcie); + if (err) { + dev_err(dev, "Parsing DT failed\n"); + return err; + } + + err = mt7621_pci_parse_request_of_pci_ranges(bridge); + if (err) { + dev_err(dev, "Error requesting pci resources from ranges"); + return err; + } + + /* set resources limits */ + ioport_resource.start = pcie->io.start; + ioport_resource.end = pcie->io.end; + + mt7621_pcie_init_ports(pcie); + + err = mt7621_pcie_enable_ports(pcie); + if (err) { + dev_err(dev, "Error enabling pcie ports\n"); + return err; + } + + setup_cm_memory_region(pcie); + + return mt7621_pcie_register_host(bridge); +} + +static const struct of_device_id mt7621_pci_ids[] = { + { .compatible = "mediatek,mt7621-pci" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mt7621_pci_ids); + +static struct platform_driver mt7621_pci_driver = { + .probe = mt7621_pci_probe, + .driver = { + .name = "mt7621-pci", + .of_match_table = of_match_ptr(mt7621_pci_ids), + }, +}; +builtin_platform_driver(mt7621_pci_driver); diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig index ec4daa63c5e3..50e5a54f7d9e 100644 --- a/arch/mips/ralink/Kconfig +++ b/arch/mips/ralink/Kconfig @@ -56,7 +56,7 @@ choice select MIPS_GIC select COMMON_CLK select CLKSRC_MIPS_GIC - select HAVE_PCI if PCI_MT7621 + select HAVE_PCI select SOC_BUS endchoice @@ -101,4 +101,11 @@ choice endchoice +config PCI_MT7621 + bool "MediaTek MT7621 PCI Controller" + depends on RALINK && SOC_MT7621 + select PCI_DRIVERS_GENERIC + help + This selects a driver for the MediaTek MT7621 PCI Controller. + endif From patchwork Sat May 15 12:40:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Paracuellos X-Patchwork-Id: 1478892 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; 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[83.49.33.29]) by smtp.gmail.com with ESMTPSA id w7sm9472749wru.51.2021.05.15.05.41.00 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 May 2021 05:41:00 -0700 (PDT) From: Sergio Paracuellos To: linux-mips@vger.kernel.org Cc: tsbogend@alpha.franken.de, devicetree@vger.kernel.org, matthias.bgg@gmail.com, john@phrozen.org, bhelgaas@google.com, robh+dt@kernel.org, linux-staging@lists.linux.dev, gregkh@linuxfoundation.org, neil@brown.name, ilya.lipnitskiy@gmail.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 3/4] staging: mt7621-pci: remove driver from staging Date: Sat, 15 May 2021 14:40:54 +0200 Message-Id: <20210515124055.22225-4-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210515124055.22225-1-sergio.paracuellos@gmail.com> References: <20210515124055.22225-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Driver has been moved into its proper place in the kernel 'arch/mips/pci'. Hence, remove it from staging. Signed-off-by: Sergio Paracuellos Acked-by: Greg Kroah-Hartman --- drivers/staging/Kconfig | 2 - drivers/staging/Makefile | 1 - drivers/staging/mt7621-pci/Kconfig | 8 - drivers/staging/mt7621-pci/Makefile | 2 - drivers/staging/mt7621-pci/TODO | 4 - .../mt7621-pci/mediatek,mt7621-pci.txt | 104 --- drivers/staging/mt7621-pci/pci-mt7621.c | 624 ------------------ 7 files changed, 745 deletions(-) delete mode 100644 drivers/staging/mt7621-pci/Kconfig delete mode 100644 drivers/staging/mt7621-pci/Makefile delete mode 100644 drivers/staging/mt7621-pci/TODO delete mode 100644 drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt delete mode 100644 drivers/staging/mt7621-pci/pci-mt7621.c diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index b7ae5bdc4eb5..9a21d730ab2b 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -86,8 +86,6 @@ source "drivers/staging/vc04_services/Kconfig" source "drivers/staging/pi433/Kconfig" -source "drivers/staging/mt7621-pci/Kconfig" - source "drivers/staging/mt7621-dma/Kconfig" source "drivers/staging/ralink-gdma/Kconfig" diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index 075c979bfe7c..b7b4916761d4 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -33,7 +33,6 @@ obj-$(CONFIG_KS7010) += ks7010/ obj-$(CONFIG_GREYBUS) += greybus/ obj-$(CONFIG_BCM2835_VCHIQ) += vc04_services/ obj-$(CONFIG_PI433) += pi433/ -obj-$(CONFIG_PCI_MT7621) += mt7621-pci/ obj-$(CONFIG_SOC_MT7621) += mt7621-dma/ obj-$(CONFIG_DMA_RALINK) += ralink-gdma/ obj-$(CONFIG_SOC_MT7621) += mt7621-dts/ diff --git a/drivers/staging/mt7621-pci/Kconfig b/drivers/staging/mt7621-pci/Kconfig deleted file mode 100644 index ce58042f2f21..000000000000 --- a/drivers/staging/mt7621-pci/Kconfig +++ /dev/null @@ -1,8 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -config PCI_MT7621 - tristate "MediaTek MT7621 PCI Controller" - depends on RALINK - select PCI_DRIVERS_GENERIC - help - This selects a driver for the MediaTek MT7621 PCI Controller. - diff --git a/drivers/staging/mt7621-pci/Makefile b/drivers/staging/mt7621-pci/Makefile deleted file mode 100644 index f4e651cf7ce3..000000000000 --- a/drivers/staging/mt7621-pci/Makefile +++ /dev/null @@ -1,2 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_PCI_MT7621) += pci-mt7621.o diff --git a/drivers/staging/mt7621-pci/TODO b/drivers/staging/mt7621-pci/TODO deleted file mode 100644 index d674a9ac85c1..000000000000 --- a/drivers/staging/mt7621-pci/TODO +++ /dev/null @@ -1,4 +0,0 @@ - -- general code review and cleanup - -Cc: NeilBrown diff --git a/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt b/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt deleted file mode 100644 index 327a68267309..000000000000 --- a/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt +++ /dev/null @@ -1,104 +0,0 @@ -MediaTek MT7621 PCIe controller - -Required properties: -- compatible: "mediatek,mt7621-pci" -- device_type: Must be "pci" -- reg: Base addresses and lengths of the PCIe subsys and root ports. -- bus-range: Range of bus numbers associated with this controller. -- #address-cells: Address representation for root ports (must be 3) -- pinctrl-names : The pin control state names. -- pinctrl-0: The "default" pinctrl state. -- #size-cells: Size representation for root ports (must be 2) -- ranges: Ranges for the PCI memory and I/O regions. -- #interrupt-cells: Must be 1 -- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties. - Please refer to the standard PCI bus binding document for a more detailed - explanation. -- status: either "disabled" or "okay". -- resets: Must contain an entry for each entry in reset-names. - See ../reset/reset.txt for details. -- reset-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of - root ports. -- clocks: Must contain an entry for each entry in clock-names. - See ../clocks/clock-bindings.txt for details. -- clock-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of - root ports. -- reset-gpios: GPIO specs for the reset pins. - -In addition, the device tree node must have sub-nodes describing each PCIe port -interface, having the following mandatory properties: - -Required properties: -- reg: Only the first four bytes are used to refer to the correct bus number - and device number. -- #address-cells: Must be 3 -- #size-cells: Must be 2 -- ranges: Sub-ranges distributed from the PCIe controller node. An empty - property is sufficient. -- bus-range: Range of bus numbers associated with this port. - -Example for MT7621: - - pcie: pcie@1e140000 { - compatible = "mediatek,mt7621-pci"; - reg = <0x1e140000 0x100 /* host-pci bridge registers */ - 0x1e142000 0x100 /* pcie port 0 RC control registers */ - 0x1e143000 0x100 /* pcie port 1 RC control registers */ - 0x1e144000 0x100>; /* pcie port 2 RC control registers */ - - #address-cells = <3>; - #size-cells = <2>; - - pinctrl-names = "default"; - pinctrl-0 = <&pcie_pins>; - - device_type = "pci"; - - bus-range = <0 255>; - ranges = < - 0x02000000 0 0x00000000 0x60000000 0 0x10000000 /* pci memory */ - 0x01000000 0 0x00000000 0x1e160000 0 0x00010000 /* io space */ - >; - - #interrupt-cells = <1>; - interrupt-map-mask = <0xF0000 0 0 1>; - interrupt-map = <0x10000 0 0 1 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>, - <0x20000 0 0 1 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>, - <0x30000 0 0 1 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>; - - status = "disabled"; - - resets = <&rstctrl 24 &rstctrl 25 &rstctrl 26>; - reset-names = "pcie0", "pcie1", "pcie2"; - clocks = <&clkctrl 24 &clkctrl 25 &clkctrl 26>; - clock-names = "pcie0", "pcie1", "pcie2"; - - reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>, - <&gpio 8 GPIO_ACTIVE_LOW>, - <&gpio 7 GPIO_ACTIVE_LOW>; - - pcie@0,0 { - reg = <0x0000 0 0 0 0>; - #address-cells = <3>; - #size-cells = <2>; - ranges; - bus-range = <0x00 0xff>; - }; - - pcie@1,0 { - reg = <0x0800 0 0 0 0>; - #address-cells = <3>; - #size-cells = <2>; - ranges; - bus-range = <0x00 0xff>; - }; - - pcie@2,0 { - reg = <0x1000 0 0 0 0>; - #address-cells = <3>; - #size-cells = <2>; - ranges; - bus-range = <0x00 0xff>; - }; - }; - diff --git a/drivers/staging/mt7621-pci/pci-mt7621.c b/drivers/staging/mt7621-pci/pci-mt7621.c deleted file mode 100644 index fe1945819d25..000000000000 --- a/drivers/staging/mt7621-pci/pci-mt7621.c +++ /dev/null @@ -1,624 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * BRIEF MODULE DESCRIPTION - * PCI init for Ralink RT2880 solution - * - * Copyright 2007 Ralink Inc. (bruce_chang@ralinktech.com.tw) - * - * May 2007 Bruce Chang - * Initial Release - * - * May 2009 Bruce Chang - * support RT2880/RT3883 PCIe - * - * May 2011 Bruce Chang - * support RT6855/MT7620 PCIe - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* MediaTek specific configuration registers */ -#define PCIE_FTS_NUM 0x70c -#define PCIE_FTS_NUM_MASK GENMASK(15, 8) -#define PCIE_FTS_NUM_L0(x) (((x) & 0xff) << 8) - -/* Host-PCI bridge registers */ -#define RALINK_PCI_PCICFG_ADDR 0x0000 -#define RALINK_PCI_PCIMSK_ADDR 0x000C -#define RALINK_PCI_CONFIG_ADDR 0x0020 -#define RALINK_PCI_CONFIG_DATA 0x0024 -#define RALINK_PCI_MEMBASE 0x0028 -#define RALINK_PCI_IOBASE 0x002C - -/* PCIe RC control registers */ -#define MT7621_PCIE_OFFSET 0x2000 -#define MT7621_NEXT_PORT 0x1000 - -#define RALINK_PCI_BAR0SETUP_ADDR 0x0010 -#define RALINK_PCI_ID 0x0030 -#define RALINK_PCI_CLASS 0x0034 -#define RALINK_PCI_SUBID 0x0038 -#define RALINK_PCI_STATUS 0x0050 - -/* Some definition values */ -#define PCIE_REVISION_ID BIT(0) -#define PCIE_CLASS_CODE (0x60400 << 8) -#define PCIE_BAR_MAP_MAX GENMASK(30, 16) -#define PCIE_BAR_ENABLE BIT(0) -#define PCIE_PORT_INT_EN(x) BIT(20 + (x)) -#define PCIE_PORT_LINKUP BIT(0) - -#define PERST_DELAY_MS 100 - -/** - * struct mt7621_pcie_port - PCIe port information - * @base: I/O mapped register base - * @list: port list - * @pcie: pointer to PCIe host info - * @clk: pointer to the port clock gate - * @phy: pointer to PHY control block - * @pcie_rst: pointer to port reset control - * @gpio_rst: gpio reset - * @slot: port slot - * @enabled: indicates if port is enabled - */ -struct mt7621_pcie_port { - void __iomem *base; - struct list_head list; - struct mt7621_pcie *pcie; - struct clk *clk; - struct phy *phy; - struct reset_control *pcie_rst; - struct gpio_desc *gpio_rst; - u32 slot; - bool enabled; -}; - -/** - * struct mt7621_pcie - PCIe host information - * @base: IO Mapped Register Base - * @io: IO resource - * @mem: pointer to non-prefetchable memory resource - * @dev: Pointer to PCIe device - * @io_map_base: virtual memory base address for io - * @ports: pointer to PCIe port information - * @resets_inverted: depends on chip revision - * reset lines are inverted. - */ -struct mt7621_pcie { - void __iomem *base; - struct device *dev; - struct resource io; - struct resource *mem; - unsigned long io_map_base; - struct list_head ports; - bool resets_inverted; -}; - -static inline u32 pcie_read(struct mt7621_pcie *pcie, u32 reg) -{ - return readl(pcie->base + reg); -} - -static inline void pcie_write(struct mt7621_pcie *pcie, u32 val, u32 reg) -{ - writel(val, pcie->base + reg); -} - -static inline void pcie_rmw(struct mt7621_pcie *pcie, u32 reg, u32 clr, u32 set) -{ - u32 val = readl(pcie->base + reg); - - val &= ~clr; - val |= set; - writel(val, pcie->base + reg); -} - -static inline u32 pcie_port_read(struct mt7621_pcie_port *port, u32 reg) -{ - return readl(port->base + reg); -} - -static inline void pcie_port_write(struct mt7621_pcie_port *port, - u32 val, u32 reg) -{ - writel(val, port->base + reg); -} - -static inline u32 mt7621_pci_get_cfgaddr(unsigned int bus, unsigned int slot, - unsigned int func, unsigned int where) -{ - return (((where & 0xF00) >> 8) << 24) | (bus << 16) | (slot << 11) | - (func << 8) | (where & 0xfc) | 0x80000000; -} - -static void __iomem *mt7621_pcie_map_bus(struct pci_bus *bus, - unsigned int devfn, int where) -{ - struct mt7621_pcie *pcie = bus->sysdata; - u32 address = mt7621_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), - PCI_FUNC(devfn), where); - - writel(address, pcie->base + RALINK_PCI_CONFIG_ADDR); - - return pcie->base + RALINK_PCI_CONFIG_DATA + (where & 3); -} - -struct pci_ops mt7621_pci_ops = { - .map_bus = mt7621_pcie_map_bus, - .read = pci_generic_config_read, - .write = pci_generic_config_write, -}; - -static u32 read_config(struct mt7621_pcie *pcie, unsigned int dev, u32 reg) -{ - u32 address = mt7621_pci_get_cfgaddr(0, dev, 0, reg); - - pcie_write(pcie, address, RALINK_PCI_CONFIG_ADDR); - return pcie_read(pcie, RALINK_PCI_CONFIG_DATA); -} - -static void write_config(struct mt7621_pcie *pcie, unsigned int dev, - u32 reg, u32 val) -{ - u32 address = mt7621_pci_get_cfgaddr(0, dev, 0, reg); - - pcie_write(pcie, address, RALINK_PCI_CONFIG_ADDR); - pcie_write(pcie, val, RALINK_PCI_CONFIG_DATA); -} - -static inline void mt7621_rst_gpio_pcie_assert(struct mt7621_pcie_port *port) -{ - if (port->gpio_rst) - gpiod_set_value(port->gpio_rst, 1); -} - -static inline void mt7621_rst_gpio_pcie_deassert(struct mt7621_pcie_port *port) -{ - if (port->gpio_rst) - gpiod_set_value(port->gpio_rst, 0); -} - -static inline bool mt7621_pcie_port_is_linkup(struct mt7621_pcie_port *port) -{ - return (pcie_port_read(port, RALINK_PCI_STATUS) & PCIE_PORT_LINKUP) != 0; -} - -static inline void mt7621_control_assert(struct mt7621_pcie_port *port) -{ - struct mt7621_pcie *pcie = port->pcie; - - if (pcie->resets_inverted) - reset_control_assert(port->pcie_rst); - else - reset_control_deassert(port->pcie_rst); -} - -static inline void mt7621_control_deassert(struct mt7621_pcie_port *port) -{ - struct mt7621_pcie *pcie = port->pcie; - - if (pcie->resets_inverted) - reset_control_deassert(port->pcie_rst); - else - reset_control_assert(port->pcie_rst); -} - -static void setup_cm_memory_region(struct mt7621_pcie *pcie) -{ - struct resource *mem_resource = pcie->mem; - struct device *dev = pcie->dev; - resource_size_t mask; - - if (mips_cps_numiocu(0)) { - /* - * FIXME: hardware doesn't accept mask values with 1s after - * 0s (e.g. 0xffef), so it would be great to warn if that's - * about to happen - */ - mask = ~(mem_resource->end - mem_resource->start); - - write_gcr_reg1_base(mem_resource->start); - write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); - dev_info(dev, "PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", - (unsigned long long)read_gcr_reg1_base(), - (unsigned long long)read_gcr_reg1_mask()); - } -} - -static int mt7621_pci_parse_request_of_pci_ranges(struct pci_host_bridge *host) -{ - struct mt7621_pcie *pcie = pci_host_bridge_priv(host); - struct device *dev = pcie->dev; - struct device_node *node = dev->of_node; - struct of_pci_range_parser parser; - struct resource_entry *entry; - struct of_pci_range range; - LIST_HEAD(res); - - if (of_pci_range_parser_init(&parser, node)) { - dev_err(dev, "missing \"ranges\" property\n"); - return -EINVAL; - } - - /* - * IO_SPACE_LIMIT for MIPS is 0xffff but this platform uses IO at - * upper address 0x001e160000. of_pci_range_to_resource does not work - * well for MIPS platforms that don't define PCI_IOBASE, so set the IO - * resource manually instead. - */ - for_each_of_pci_range(&parser, &range) { - switch (range.flags & IORESOURCE_TYPE_BITS) { - case IORESOURCE_IO: - pcie->io_map_base = - (unsigned long)ioremap(range.cpu_addr, - range.size); - pcie->io.name = node->full_name; - pcie->io.flags = range.flags; - pcie->io.start = range.cpu_addr; - pcie->io.end = range.cpu_addr + range.size - 1; - pcie->io.parent = pcie->io.child = pcie->io.sibling = NULL; - set_io_port_base(pcie->io_map_base); - break; - } - } - - entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); - if (!entry) { - dev_err(dev, "Cannot get memory resource"); - return -EINVAL; - } - - pcie->mem = entry->res; - pci_add_resource(&res, &pcie->io); - pci_add_resource(&res, entry->res); - list_splice_init(&res, &host->windows); - - return 0; -} - -static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie, - int slot) -{ - struct mt7621_pcie_port *port; - struct device *dev = pcie->dev; - struct platform_device *pdev = to_platform_device(dev); - char name[10]; - - port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); - if (!port) - return -ENOMEM; - - port->base = devm_platform_ioremap_resource(pdev, slot + 1); - if (IS_ERR(port->base)) - return PTR_ERR(port->base); - - snprintf(name, sizeof(name), "pcie%d", slot); - port->clk = devm_clk_get(dev, name); - if (IS_ERR(port->clk)) { - dev_err(dev, "failed to get pcie%d clock\n", slot); - return PTR_ERR(port->clk); - } - - snprintf(name, sizeof(name), "pcie%d", slot); - port->pcie_rst = devm_reset_control_get_exclusive(dev, name); - if (PTR_ERR(port->pcie_rst) == -EPROBE_DEFER) { - dev_err(dev, "failed to get pcie%d reset control\n", slot); - return PTR_ERR(port->pcie_rst); - } - - snprintf(name, sizeof(name), "pcie-phy%d", slot); - port->phy = devm_phy_get(dev, name); - if (IS_ERR(port->phy) && slot != 1) - return PTR_ERR(port->phy); - - port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot, - GPIOD_OUT_LOW); - if (IS_ERR(port->gpio_rst)) { - dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot); - return PTR_ERR(port->gpio_rst); - } - - port->slot = slot; - port->pcie = pcie; - - INIT_LIST_HEAD(&port->list); - list_add_tail(&port->list, &pcie->ports); - - return 0; -} - -static int mt7621_pcie_parse_dt(struct mt7621_pcie *pcie) -{ - struct device *dev = pcie->dev; - struct platform_device *pdev = to_platform_device(dev); - struct device_node *node = dev->of_node, *child; - int err; - - pcie->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(pcie->base)) - return PTR_ERR(pcie->base); - - for_each_available_child_of_node(node, child) { - int slot; - - err = of_pci_get_devfn(child); - if (err < 0) { - of_node_put(child); - dev_err(dev, "failed to parse devfn: %d\n", err); - return err; - } - - slot = PCI_SLOT(err); - - err = mt7621_pcie_parse_port(pcie, slot); - if (err) { - of_node_put(child); - return err; - } - } - - return 0; -} - -static int mt7621_pcie_init_port(struct mt7621_pcie_port *port) -{ - struct mt7621_pcie *pcie = port->pcie; - struct device *dev = pcie->dev; - u32 slot = port->slot; - int err; - - err = phy_init(port->phy); - if (err) { - dev_err(dev, "failed to initialize port%d phy\n", slot); - return err; - } - - err = phy_power_on(port->phy); - if (err) { - dev_err(dev, "failed to power on port%d phy\n", slot); - phy_exit(port->phy); - return err; - } - - port->enabled = true; - - return 0; -} - -static void mt7621_pcie_reset_assert(struct mt7621_pcie *pcie) -{ - struct mt7621_pcie_port *port; - - list_for_each_entry(port, &pcie->ports, list) { - /* PCIe RC reset assert */ - mt7621_control_assert(port); - - /* PCIe EP reset assert */ - mt7621_rst_gpio_pcie_assert(port); - } - - msleep(PERST_DELAY_MS); -} - -static void mt7621_pcie_reset_rc_deassert(struct mt7621_pcie *pcie) -{ - struct mt7621_pcie_port *port; - - list_for_each_entry(port, &pcie->ports, list) - mt7621_control_deassert(port); -} - -static void mt7621_pcie_reset_ep_deassert(struct mt7621_pcie *pcie) -{ - struct mt7621_pcie_port *port; - - list_for_each_entry(port, &pcie->ports, list) - mt7621_rst_gpio_pcie_deassert(port); - - msleep(PERST_DELAY_MS); -} - -static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie) -{ - struct device *dev = pcie->dev; - struct mt7621_pcie_port *port, *tmp; - int err; - - mt7621_pcie_reset_assert(pcie); - mt7621_pcie_reset_rc_deassert(pcie); - - list_for_each_entry_safe(port, tmp, &pcie->ports, list) { - u32 slot = port->slot; - - if (slot == 1) { - port->enabled = true; - continue; - } - - err = mt7621_pcie_init_port(port); - if (err) { - dev_err(dev, "Initiating port %d failed\n", slot); - list_del(&port->list); - } - } - - mt7621_pcie_reset_ep_deassert(pcie); - - tmp = NULL; - list_for_each_entry(port, &pcie->ports, list) { - u32 slot = port->slot; - - if (!mt7621_pcie_port_is_linkup(port)) { - dev_err(dev, "pcie%d no card, disable it (RST & CLK)\n", - slot); - mt7621_control_assert(port); - clk_disable_unprepare(port->clk); - port->enabled = false; - - if (slot == 0) { - tmp = port; - continue; - } - - if (slot == 1 && tmp && !tmp->enabled) - phy_power_off(tmp->phy); - } - } -} - -static void mt7621_pcie_enable_port(struct mt7621_pcie_port *port) -{ - struct mt7621_pcie *pcie = port->pcie; - u32 slot = port->slot; - u32 offset = MT7621_PCIE_OFFSET + (slot * MT7621_NEXT_PORT); - u32 val; - - /* enable pcie interrupt */ - val = pcie_read(pcie, RALINK_PCI_PCIMSK_ADDR); - val |= PCIE_PORT_INT_EN(slot); - pcie_write(pcie, val, RALINK_PCI_PCIMSK_ADDR); - - /* map 2G DDR region */ - pcie_write(pcie, PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE, - offset + RALINK_PCI_BAR0SETUP_ADDR); - - /* configure class code and revision ID */ - pcie_write(pcie, PCIE_CLASS_CODE | PCIE_REVISION_ID, - offset + RALINK_PCI_CLASS); -} - -static int mt7621_pcie_enable_ports(struct mt7621_pcie *pcie) -{ - struct device *dev = pcie->dev; - struct mt7621_pcie_port *port; - u8 num_slots_enabled = 0; - u32 slot; - u32 val; - int err; - - /* Setup MEMWIN and IOWIN */ - pcie_write(pcie, 0xffffffff, RALINK_PCI_MEMBASE); - pcie_write(pcie, pcie->io.start, RALINK_PCI_IOBASE); - - list_for_each_entry(port, &pcie->ports, list) { - if (port->enabled) { - err = clk_prepare_enable(port->clk); - if (err) { - dev_err(dev, "enabling clk pcie%d\n", slot); - return err; - } - - mt7621_pcie_enable_port(port); - dev_info(dev, "PCIE%d enabled\n", port->slot); - num_slots_enabled++; - } - } - - for (slot = 0; slot < num_slots_enabled; slot++) { - val = read_config(pcie, slot, PCI_COMMAND); - val |= PCI_COMMAND_MASTER; - write_config(pcie, slot, PCI_COMMAND, val); - /* configure RC FTS number to 250 when it leaves L0s */ - val = read_config(pcie, slot, PCIE_FTS_NUM); - val &= ~PCIE_FTS_NUM_MASK; - val |= PCIE_FTS_NUM_L0(0x50); - write_config(pcie, slot, PCIE_FTS_NUM, val); - } - - return 0; -} - -static int mt7621_pcie_register_host(struct pci_host_bridge *host) -{ - struct mt7621_pcie *pcie = pci_host_bridge_priv(host); - - host->ops = &mt7621_pci_ops; - host->sysdata = pcie; - return pci_host_probe(host); -} - -static const struct soc_device_attribute mt7621_pci_quirks_match[] = { - { .soc_id = "mt7621", .revision = "E2" } -}; - -static int mt7621_pci_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - const struct soc_device_attribute *attr; - struct mt7621_pcie *pcie; - struct pci_host_bridge *bridge; - int err; - - if (!dev->of_node) - return -ENODEV; - - bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); - if (!bridge) - return -ENOMEM; - - pcie = pci_host_bridge_priv(bridge); - pcie->dev = dev; - platform_set_drvdata(pdev, pcie); - INIT_LIST_HEAD(&pcie->ports); - - attr = soc_device_match(mt7621_pci_quirks_match); - if (attr) - pcie->resets_inverted = true; - - err = mt7621_pcie_parse_dt(pcie); - if (err) { - dev_err(dev, "Parsing DT failed\n"); - return err; - } - - err = mt7621_pci_parse_request_of_pci_ranges(bridge); - if (err) { - dev_err(dev, "Error requesting pci resources from ranges"); - return err; - } - - /* set resources limits */ - ioport_resource.start = pcie->io.start; - ioport_resource.end = pcie->io.end; - - mt7621_pcie_init_ports(pcie); - - err = mt7621_pcie_enable_ports(pcie); - if (err) { - dev_err(dev, "Error enabling pcie ports\n"); - return err; - } - - setup_cm_memory_region(pcie); - - return mt7621_pcie_register_host(bridge); -} - -static const struct of_device_id mt7621_pci_ids[] = { - { .compatible = "mediatek,mt7621-pci" }, - {}, -}; -MODULE_DEVICE_TABLE(of, mt7621_pci_ids); - -static struct platform_driver mt7621_pci_driver = { - .probe = mt7621_pci_probe, - .driver = { - .name = "mt7621-pci", - .of_match_table = of_match_ptr(mt7621_pci_ids), - }, -}; 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[83.49.33.29]) by smtp.gmail.com with ESMTPSA id w7sm9472749wru.51.2021.05.15.05.41.01 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 May 2021 05:41:01 -0700 (PDT) From: Sergio Paracuellos To: linux-mips@vger.kernel.org Cc: tsbogend@alpha.franken.de, devicetree@vger.kernel.org, matthias.bgg@gmail.com, john@phrozen.org, bhelgaas@google.com, robh+dt@kernel.org, linux-staging@lists.linux.dev, gregkh@linuxfoundation.org, neil@brown.name, ilya.lipnitskiy@gmail.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 4/4] MAINTAINERS: add myself as maintainer of the MT7621 PCI controller driver Date: Sat, 15 May 2021 14:40:55 +0200 Message-Id: <20210515124055.22225-5-sergio.paracuellos@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210515124055.22225-1-sergio.paracuellos@gmail.com> References: <20210515124055.22225-1-sergio.paracuellos@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add myself as maintainer of the PCie Controlller driver for MT7621 SoCs. Signed-off-by: Sergio Paracuellos --- MAINTAINERS | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index bd7aff0c120f..312ea2cad79b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11562,6 +11562,12 @@ S: Maintained F: Documentation/devicetree/bindings/i2c/i2c-mt7621.txt F: drivers/i2c/busses/i2c-mt7621.c +MEDIATEK MT7621 PCI CONTROLLER DRIVER +M: Sergio Paracuellos +S: Maintained +F: Documentation/devicetree/bindings/pci/mediatek,mt7621-pci.yaml +F: arch/mips/pci/pci-mt7621.c + MEDIATEK MT7621 PHY PCI DRIVER M: Sergio Paracuellos S: Maintained