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Merge branch 'pci/host-mediatek' into next
* pci/host-mediatek: dt-bindings: PCI: Add documentation for MediaTek PCIe PCI: mediatek: Add MediaTek PCIe host controller support
This commit is contained in:
Bjorn Helgaas
commit
097d05704e
130
Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt
Normal file
130
Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt
Normal file
@ -0,0 +1,130 @@
|
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MediaTek Gen2 PCIe controller which is available on MT7623 series SoCs
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PCIe subsys supports single root complex (RC) with 3 Root Ports. Each root
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ports supports a Gen2 1-lane Link and has PIPE interface to PHY.
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Required properties:
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- compatible: Should contain "mediatek,mt7623-pcie".
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- device_type: Must be "pci"
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- reg: Base addresses and lengths of the PCIe controller.
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- #address-cells: Address representation for root ports (must be 3)
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- #size-cells: Size representation for root ports (must be 2)
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- #interrupt-cells: Size representation for interrupts (must be 1)
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- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
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Please refer to the standard PCI bus binding document for a more detailed
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explanation.
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- clocks: Must contain an entry for each entry in clock-names.
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See ../clocks/clock-bindings.txt for details.
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- clock-names: Must include the following entries:
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- free_ck :for reference clock of PCIe subsys
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- sys_ck0 :for clock of Port0
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- sys_ck1 :for clock of Port1
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- sys_ck2 :for clock of Port2
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- resets: Must contain an entry for each entry in reset-names.
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See ../reset/reset.txt for details.
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- reset-names: Must include the following entries:
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- pcie-rst0 :port0 reset
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- pcie-rst1 :port1 reset
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- pcie-rst2 :port2 reset
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- phys: List of PHY specifiers (used by generic PHY framework).
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- phy-names : Must be "pcie-phy0", "pcie-phy1", "pcie-phyN".. based on the
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number of PHYs as specified in *phys* property.
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- power-domains: A phandle and power domain specifier pair to the power domain
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which is responsible for collapsing and restoring power to the peripheral.
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- bus-range: Range of bus numbers associated with this controller.
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- ranges: Ranges for the PCI memory and I/O regions.
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In addition, the device tree node must have sub-nodes describing each
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PCIe port interface, having the following mandatory properties:
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Required properties:
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- device_type: Must be "pci"
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- reg: Only the first four bytes are used to refer to the correct bus number
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and device number.
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- #address-cells: Must be 3
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- #size-cells: Must be 2
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- #interrupt-cells: Must be 1
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- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
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Please refer to the standard PCI bus binding document for a more detailed
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explanation.
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- ranges: Sub-ranges distributed from the PCIe controller node. An empty
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property is sufficient.
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- num-lanes: Number of lanes to use for this port.
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Examples:
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hifsys: syscon@1a000000 {
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compatible = "mediatek,mt7623-hifsys",
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"mediatek,mt2701-hifsys",
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"syscon";
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reg = <0 0x1a000000 0 0x1000>;
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#clock-cells = <1>;
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#reset-cells = <1>;
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};
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pcie: pcie-controller@1a140000 {
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compatible = "mediatek,mt7623-pcie";
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device_type = "pci";
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reg = <0 0x1a140000 0 0x1000>, /* PCIe shared registers */
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<0 0x1a142000 0 0x1000>, /* Port0 registers */
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<0 0x1a143000 0 0x1000>, /* Port1 registers */
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<0 0x1a144000 0 0x1000>; /* Port2 registers */
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#address-cells = <3>;
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#size-cells = <2>;
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#interrupt-cells = <1>;
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interrupt-map-mask = <0xf800 0 0 0>;
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interrupt-map = <0x0000 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>,
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<0x0800 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>,
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<0x1000 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
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clocks = <&topckgen CLK_TOP_ETHIF_SEL>,
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<&hifsys CLK_HIFSYS_PCIE0>,
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<&hifsys CLK_HIFSYS_PCIE1>,
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<&hifsys CLK_HIFSYS_PCIE2>;
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clock-names = "free_ck", "sys_ck0", "sys_ck1", "sys_ck2";
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resets = <&hifsys MT2701_HIFSYS_PCIE0_RST>,
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<&hifsys MT2701_HIFSYS_PCIE1_RST>,
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<&hifsys MT2701_HIFSYS_PCIE2_RST>;
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reset-names = "pcie-rst0", "pcie-rst1", "pcie-rst2";
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phys = <&pcie0_phy>, <&pcie1_phy>, <&pcie2_phy>;
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phy-names = "pcie-phy0", "pcie-phy1", "pcie-phy2";
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power-domains = <&scpsys MT2701_POWER_DOMAIN_HIF>;
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bus-range = <0x00 0xff>;
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ranges = <0x81000000 0 0x1a160000 0 0x1a160000 0 0x00010000 /* I/O space */
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0x83000000 0 0x60000000 0 0x60000000 0 0x10000000>; /* memory space */
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pcie@0,0 {
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device_type = "pci";
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reg = <0x0000 0 0 0 0>;
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#address-cells = <3>;
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#size-cells = <2>;
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#interrupt-cells = <1>;
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interrupt-map-mask = <0 0 0 0>;
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interrupt-map = <0 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>;
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ranges;
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num-lanes = <1>;
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};
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pcie@1,0 {
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device_type = "pci";
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reg = <0x0800 0 0 0 0>;
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#address-cells = <3>;
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#size-cells = <2>;
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#interrupt-cells = <1>;
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interrupt-map-mask = <0 0 0 0>;
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interrupt-map = <0 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>;
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ranges;
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num-lanes = <1>;
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};
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pcie@2,0 {
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device_type = "pci";
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reg = <0x1000 0 0 0 0>;
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#address-cells = <3>;
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#size-cells = <2>;
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#interrupt-cells = <1>;
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interrupt-map-mask = <0 0 0 0>;
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interrupt-map = <0 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
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ranges;
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num-lanes = <1>;
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};
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};
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@ -9965,6 +9965,14 @@ S: Supported
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F: Documentation/devicetree/bindings/pci/pci-thunder-*
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F: drivers/pci/host/pci-thunder-*
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PCIE DRIVER FOR MEDIATEK
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M: Ryder Lee <ryder.lee@mediatek.com>
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L: linux-pci@vger.kernel.org
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L: linux-mediatek@lists.infradead.org
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S: Supported
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F: Documentation/devicetree/bindings/pci/mediatek*
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F: drivers/pci/host/*mediatek*
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PCMCIA SUBSYSTEM
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P: Linux PCMCIA Team
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L: linux-pcmcia@lists.infradead.org
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@ -180,6 +180,17 @@ config PCIE_ROCKCHIP
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There is 1 internal PCIe port available to support GEN2 with
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4 slots.
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config PCIE_MEDIATEK
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bool "MediaTek PCIe controller"
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depends on ARM && (ARCH_MEDIATEK || COMPILE_TEST)
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depends on OF
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depends on PCI
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select PCIEPORTBUS
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help
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Say Y here if you want to enable PCIe controller support on
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MT7623 series SoCs. There is one single root complex with 3 root
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ports available. Each port supports Gen2 lane x1.
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config VMD
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depends on PCI_MSI && X86_64 && SRCU
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tristate "Intel Volume Management Device Driver"
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@ -18,6 +18,7 @@ obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
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obj-$(CONFIG_PCIE_ALTERA) += pcie-altera.o
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obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
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obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
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obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
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obj-$(CONFIG_VMD) += vmd.o
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# The following drivers are for devices that use the generic ACPI
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554
drivers/pci/host/pcie-mediatek.c
Normal file
554
drivers/pci/host/pcie-mediatek.c
Normal file
@ -0,0 +1,554 @@
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/*
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* MediaTek PCIe host controller driver.
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*
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* Copyright (c) 2017 MediaTek Inc.
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* Author: Ryder Lee <ryder.lee@mediatek.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/of_address.h>
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#include <linux/of_pci.h>
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#include <linux/of_platform.h>
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#include <linux/pci.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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/* PCIe shared registers */
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#define PCIE_SYS_CFG 0x00
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#define PCIE_INT_ENABLE 0x0c
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#define PCIE_CFG_ADDR 0x20
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#define PCIE_CFG_DATA 0x24
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/* PCIe per port registers */
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#define PCIE_BAR0_SETUP 0x10
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#define PCIE_CLASS 0x34
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#define PCIE_LINK_STATUS 0x50
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#define PCIE_PORT_INT_EN(x) BIT(20 + (x))
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#define PCIE_PORT_PERST(x) BIT(1 + (x))
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#define PCIE_PORT_LINKUP BIT(0)
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#define PCIE_BAR_MAP_MAX GENMASK(31, 16)
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#define PCIE_BAR_ENABLE BIT(0)
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#define PCIE_REVISION_ID BIT(0)
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#define PCIE_CLASS_CODE (0x60400 << 8)
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#define PCIE_CONF_REG(regn) (((regn) & GENMASK(7, 2)) | \
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((((regn) >> 8) & GENMASK(3, 0)) << 24))
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#define PCIE_CONF_FUN(fun) (((fun) << 8) & GENMASK(10, 8))
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#define PCIE_CONF_DEV(dev) (((dev) << 11) & GENMASK(15, 11))
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#define PCIE_CONF_BUS(bus) (((bus) << 16) & GENMASK(23, 16))
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#define PCIE_CONF_ADDR(regn, fun, dev, bus) \
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(PCIE_CONF_REG(regn) | PCIE_CONF_FUN(fun) | \
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PCIE_CONF_DEV(dev) | PCIE_CONF_BUS(bus))
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/* MediaTek specific configuration registers */
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#define PCIE_FTS_NUM 0x70c
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#define PCIE_FTS_NUM_MASK GENMASK(15, 8)
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#define PCIE_FTS_NUM_L0(x) ((x) & 0xff << 8)
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#define PCIE_FC_CREDIT 0x73c
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#define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16))
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#define PCIE_FC_CREDIT_VAL(x) ((x) << 16)
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/**
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* struct mtk_pcie_port - PCIe port information
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* @base: IO mapped register base
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* @list: port list
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* @pcie: pointer to PCIe host info
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* @reset: pointer to port reset control
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* @sys_ck: pointer to bus clock
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* @phy: pointer to phy control block
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* @lane: lane count
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* @index: port index
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*/
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struct mtk_pcie_port {
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void __iomem *base;
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struct list_head list;
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struct mtk_pcie *pcie;
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struct reset_control *reset;
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struct clk *sys_ck;
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struct phy *phy;
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u32 lane;
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u32 index;
|
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};
|
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|
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/**
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* struct mtk_pcie - PCIe host information
|
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* @dev: pointer to PCIe device
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* @base: IO mapped register base
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* @free_ck: free-run reference clock
|
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* @io: IO resource
|
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* @pio: PIO resource
|
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* @mem: non-prefetchable memory resource
|
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* @busn: bus range
|
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* @offset: IO / Memory offset
|
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* @ports: pointer to PCIe port information
|
||||
*/
|
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struct mtk_pcie {
|
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struct device *dev;
|
||||
void __iomem *base;
|
||||
struct clk *free_ck;
|
||||
|
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struct resource io;
|
||||
struct resource pio;
|
||||
struct resource mem;
|
||||
struct resource busn;
|
||||
struct {
|
||||
resource_size_t mem;
|
||||
resource_size_t io;
|
||||
} offset;
|
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struct list_head ports;
|
||||
};
|
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|
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static inline bool mtk_pcie_link_up(struct mtk_pcie_port *port)
|
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{
|
||||
return !!(readl(port->base + PCIE_LINK_STATUS) & PCIE_PORT_LINKUP);
|
||||
}
|
||||
|
||||
static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
|
||||
{
|
||||
struct device *dev = pcie->dev;
|
||||
|
||||
clk_disable_unprepare(pcie->free_ck);
|
||||
|
||||
if (dev->pm_domain) {
|
||||
pm_runtime_put_sync(dev);
|
||||
pm_runtime_disable(dev);
|
||||
}
|
||||
}
|
||||
|
||||
static void mtk_pcie_port_free(struct mtk_pcie_port *port)
|
||||
{
|
||||
struct mtk_pcie *pcie = port->pcie;
|
||||
struct device *dev = pcie->dev;
|
||||
|
||||
devm_iounmap(dev, port->base);
|
||||
list_del(&port->list);
|
||||
devm_kfree(dev, port);
|
||||
}
|
||||
|
||||
static void mtk_pcie_put_resources(struct mtk_pcie *pcie)
|
||||
{
|
||||
struct mtk_pcie_port *port, *tmp;
|
||||
|
||||
list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
|
||||
phy_power_off(port->phy);
|
||||
clk_disable_unprepare(port->sys_ck);
|
||||
mtk_pcie_port_free(port);
|
||||
}
|
||||
|
||||
mtk_pcie_subsys_powerdown(pcie);
|
||||
}
|
||||
|
||||
static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus,
|
||||
unsigned int devfn, int where)
|
||||
{
|
||||
struct pci_host_bridge *host = pci_find_host_bridge(bus);
|
||||
struct mtk_pcie *pcie = pci_host_bridge_priv(host);
|
||||
|
||||
writel(PCIE_CONF_ADDR(where, PCI_FUNC(devfn), PCI_SLOT(devfn),
|
||||
bus->number), pcie->base + PCIE_CFG_ADDR);
|
||||
|
||||
return pcie->base + PCIE_CFG_DATA + (where & 3);
|
||||
}
|
||||
|
||||
static struct pci_ops mtk_pcie_ops = {
|
||||
.map_bus = mtk_pcie_map_bus,
|
||||
.read = pci_generic_config_read,
|
||||
.write = pci_generic_config_write,
|
||||
};
|
||||
|
||||
static void mtk_pcie_configure_rc(struct mtk_pcie_port *port)
|
||||
{
|
||||
struct mtk_pcie *pcie = port->pcie;
|
||||
u32 func = PCI_FUNC(port->index << 3);
|
||||
u32 slot = PCI_SLOT(port->index << 3);
|
||||
u32 val;
|
||||
|
||||
/* enable interrupt */
|
||||
val = readl(pcie->base + PCIE_INT_ENABLE);
|
||||
val |= PCIE_PORT_INT_EN(port->index);
|
||||
writel(val, pcie->base + PCIE_INT_ENABLE);
|
||||
|
||||
/* map to all DDR region. We need to set it before cfg operation. */
|
||||
writel(PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE,
|
||||
port->base + PCIE_BAR0_SETUP);
|
||||
|
||||
/* configure class code and revision ID */
|
||||
writel(PCIE_CLASS_CODE | PCIE_REVISION_ID, port->base + PCIE_CLASS);
|
||||
|
||||
/* configure FC credit */
|
||||
writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0),
|
||||
pcie->base + PCIE_CFG_ADDR);
|
||||
val = readl(pcie->base + PCIE_CFG_DATA);
|
||||
val &= ~PCIE_FC_CREDIT_MASK;
|
||||
val |= PCIE_FC_CREDIT_VAL(0x806c);
|
||||
writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0),
|
||||
pcie->base + PCIE_CFG_ADDR);
|
||||
writel(val, pcie->base + PCIE_CFG_DATA);
|
||||
|
||||
/* configure RC FTS number to 250 when it leaves L0s */
|
||||
writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0),
|
||||
pcie->base + PCIE_CFG_ADDR);
|
||||
val = readl(pcie->base + PCIE_CFG_DATA);
|
||||
val &= ~PCIE_FTS_NUM_MASK;
|
||||
val |= PCIE_FTS_NUM_L0(0x50);
|
||||
writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0),
|
||||
pcie->base + PCIE_CFG_ADDR);
|
||||
writel(val, pcie->base + PCIE_CFG_DATA);
|
||||
}
|
||||
|
||||
static void mtk_pcie_assert_ports(struct mtk_pcie_port *port)
|
||||
{
|
||||
struct mtk_pcie *pcie = port->pcie;
|
||||
u32 val;
|
||||
|
||||
/* assert port PERST_N */
|
||||
val = readl(pcie->base + PCIE_SYS_CFG);
|
||||
val |= PCIE_PORT_PERST(port->index);
|
||||
writel(val, pcie->base + PCIE_SYS_CFG);
|
||||
|
||||
/* de-assert port PERST_N */
|
||||
val = readl(pcie->base + PCIE_SYS_CFG);
|
||||
val &= ~PCIE_PORT_PERST(port->index);
|
||||
writel(val, pcie->base + PCIE_SYS_CFG);
|
||||
|
||||
/* PCIe v2.0 need at least 100ms delay to train from Gen1 to Gen2 */
|
||||
msleep(100);
|
||||
}
|
||||
|
||||
static void mtk_pcie_enable_ports(struct mtk_pcie_port *port)
|
||||
{
|
||||
struct device *dev = port->pcie->dev;
|
||||
int err;
|
||||
|
||||
err = clk_prepare_enable(port->sys_ck);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to enable port%d clock\n", port->index);
|
||||
goto err_sys_clk;
|
||||
}
|
||||
|
||||
reset_control_assert(port->reset);
|
||||
reset_control_deassert(port->reset);
|
||||
|
||||
err = phy_power_on(port->phy);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to power on port%d phy\n", port->index);
|
||||
goto err_phy_on;
|
||||
}
|
||||
|
||||
mtk_pcie_assert_ports(port);
|
||||
|
||||
/* if link up, then setup root port configuration space */
|
||||
if (mtk_pcie_link_up(port)) {
|
||||
mtk_pcie_configure_rc(port);
|
||||
return;
|
||||
}
|
||||
|
||||
dev_info(dev, "Port%d link down\n", port->index);
|
||||
|
||||
phy_power_off(port->phy);
|
||||
err_phy_on:
|
||||
clk_disable_unprepare(port->sys_ck);
|
||||
err_sys_clk:
|
||||
mtk_pcie_port_free(port);
|
||||
}
|
||||
|
||||
static int mtk_pcie_parse_ports(struct mtk_pcie *pcie,
|
||||
struct device_node *node,
|
||||
int index)
|
||||
{
|
||||
struct mtk_pcie_port *port;
|
||||
struct resource *regs;
|
||||
struct device *dev = pcie->dev;
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
char name[10];
|
||||
int err;
|
||||
|
||||
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
|
||||
if (!port)
|
||||
return -ENOMEM;
|
||||
|
||||
err = of_property_read_u32(node, "num-lanes", &port->lane);
|
||||
if (err) {
|
||||
dev_err(dev, "missing num-lanes property\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
regs = platform_get_resource(pdev, IORESOURCE_MEM, index + 1);
|
||||
port->base = devm_ioremap_resource(dev, regs);
|
||||
if (IS_ERR(port->base)) {
|
||||
dev_err(dev, "failed to map port%d base\n", index);
|
||||
return PTR_ERR(port->base);
|
||||
}
|
||||
|
||||
snprintf(name, sizeof(name), "sys_ck%d", index);
|
||||
port->sys_ck = devm_clk_get(dev, name);
|
||||
if (IS_ERR(port->sys_ck)) {
|
||||
dev_err(dev, "failed to get port%d clock\n", index);
|
||||
return PTR_ERR(port->sys_ck);
|
||||
}
|
||||
|
||||
snprintf(name, sizeof(name), "pcie-rst%d", index);
|
||||
port->reset = devm_reset_control_get_optional(dev, name);
|
||||
if (PTR_ERR(port->reset) == -EPROBE_DEFER)
|
||||
return PTR_ERR(port->reset);
|
||||
|
||||
/* some platforms may use default PHY setting */
|
||||
snprintf(name, sizeof(name), "pcie-phy%d", index);
|
||||
port->phy = devm_phy_optional_get(dev, name);
|
||||
if (IS_ERR(port->phy))
|
||||
return PTR_ERR(port->phy);
|
||||
|
||||
port->index = index;
|
||||
port->pcie = pcie;
|
||||
|
||||
INIT_LIST_HEAD(&port->list);
|
||||
list_add_tail(&port->list, &pcie->ports);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
|
||||
{
|
||||
struct device *dev = pcie->dev;
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct resource *regs;
|
||||
int err;
|
||||
|
||||
/* get shared registers */
|
||||
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
pcie->base = devm_ioremap_resource(dev, regs);
|
||||
if (IS_ERR(pcie->base)) {
|
||||
dev_err(dev, "failed to map shared register\n");
|
||||
return PTR_ERR(pcie->base);
|
||||
}
|
||||
|
||||
pcie->free_ck = devm_clk_get(dev, "free_ck");
|
||||
if (IS_ERR(pcie->free_ck)) {
|
||||
if (PTR_ERR(pcie->free_ck) == -EPROBE_DEFER)
|
||||
return -EPROBE_DEFER;
|
||||
|
||||
pcie->free_ck = NULL;
|
||||
}
|
||||
|
||||
if (dev->pm_domain) {
|
||||
pm_runtime_enable(dev);
|
||||
pm_runtime_get_sync(dev);
|
||||
}
|
||||
|
||||
/* enable top level clock */
|
||||
err = clk_prepare_enable(pcie->free_ck);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to enable free_ck\n");
|
||||
goto err_free_ck;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_ck:
|
||||
if (dev->pm_domain) {
|
||||
pm_runtime_put_sync(dev);
|
||||
pm_runtime_disable(dev);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mtk_pcie_setup(struct mtk_pcie *pcie)
|
||||
{
|
||||
struct device *dev = pcie->dev;
|
||||
struct device_node *node = dev->of_node, *child;
|
||||
struct of_pci_range_parser parser;
|
||||
struct of_pci_range range;
|
||||
struct resource res;
|
||||
struct mtk_pcie_port *port, *tmp;
|
||||
int err;
|
||||
|
||||
if (of_pci_range_parser_init(&parser, node)) {
|
||||
dev_err(dev, "missing \"ranges\" property\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
for_each_of_pci_range(&parser, &range) {
|
||||
err = of_pci_range_to_resource(&range, node, &res);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
switch (res.flags & IORESOURCE_TYPE_BITS) {
|
||||
case IORESOURCE_IO:
|
||||
pcie->offset.io = res.start - range.pci_addr;
|
||||
|
||||
memcpy(&pcie->pio, &res, sizeof(res));
|
||||
pcie->pio.name = node->full_name;
|
||||
|
||||
pcie->io.start = range.cpu_addr;
|
||||
pcie->io.end = range.cpu_addr + range.size - 1;
|
||||
pcie->io.flags = IORESOURCE_MEM;
|
||||
pcie->io.name = "I/O";
|
||||
|
||||
memcpy(&res, &pcie->io, sizeof(res));
|
||||
break;
|
||||
|
||||
case IORESOURCE_MEM:
|
||||
pcie->offset.mem = res.start - range.pci_addr;
|
||||
|
||||
memcpy(&pcie->mem, &res, sizeof(res));
|
||||
pcie->mem.name = "non-prefetchable";
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
err = of_pci_parse_bus_range(node, &pcie->busn);
|
||||
if (err < 0) {
|
||||
dev_err(dev, "failed to parse bus ranges property: %d\n", err);
|
||||
pcie->busn.name = node->name;
|
||||
pcie->busn.start = 0;
|
||||
pcie->busn.end = 0xff;
|
||||
pcie->busn.flags = IORESOURCE_BUS;
|
||||
}
|
||||
|
||||
for_each_available_child_of_node(node, child) {
|
||||
int index;
|
||||
|
||||
err = of_pci_get_devfn(child);
|
||||
if (err < 0) {
|
||||
dev_err(dev, "failed to parse devfn: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
index = PCI_SLOT(err);
|
||||
|
||||
err = mtk_pcie_parse_ports(pcie, child, index);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
err = mtk_pcie_subsys_powerup(pcie);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* enable each port, and then check link status */
|
||||
list_for_each_entry_safe(port, tmp, &pcie->ports, list)
|
||||
mtk_pcie_enable_ports(port);
|
||||
|
||||
/* power down PCIe subsys if slots are all empty (link down) */
|
||||
if (list_empty(&pcie->ports))
|
||||
mtk_pcie_subsys_powerdown(pcie);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
|
||||
{
|
||||
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
|
||||
struct list_head *windows = &host->windows;
|
||||
struct device *dev = pcie->dev;
|
||||
int err;
|
||||
|
||||
pci_add_resource_offset(windows, &pcie->pio, pcie->offset.io);
|
||||
pci_add_resource_offset(windows, &pcie->mem, pcie->offset.mem);
|
||||
pci_add_resource(windows, &pcie->busn);
|
||||
|
||||
err = devm_request_pci_bus_resources(dev, windows);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
pci_remap_iospace(&pcie->pio, pcie->io.start);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mtk_pcie_register_host(struct pci_host_bridge *host)
|
||||
{
|
||||
struct mtk_pcie *pcie = pci_host_bridge_priv(host);
|
||||
struct pci_bus *child;
|
||||
int err;
|
||||
|
||||
host->busnr = pcie->busn.start;
|
||||
host->dev.parent = pcie->dev;
|
||||
host->ops = &mtk_pcie_ops;
|
||||
host->map_irq = of_irq_parse_and_map_pci;
|
||||
host->swizzle_irq = pci_common_swizzle;
|
||||
|
||||
err = pci_scan_root_bus_bridge(host);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
pci_bus_size_bridges(host->bus);
|
||||
pci_bus_assign_resources(host->bus);
|
||||
|
||||
list_for_each_entry(child, &host->bus->children, node)
|
||||
pcie_bus_configure_settings(child);
|
||||
|
||||
pci_bus_add_devices(host->bus);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mtk_pcie_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct mtk_pcie *pcie;
|
||||
struct pci_host_bridge *host;
|
||||
int err;
|
||||
|
||||
host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
|
||||
if (!host)
|
||||
return -ENOMEM;
|
||||
|
||||
pcie = pci_host_bridge_priv(host);
|
||||
|
||||
pcie->dev = dev;
|
||||
platform_set_drvdata(pdev, pcie);
|
||||
INIT_LIST_HEAD(&pcie->ports);
|
||||
|
||||
err = mtk_pcie_setup(pcie);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = mtk_pcie_request_resources(pcie);
|
||||
if (err)
|
||||
goto put_resources;
|
||||
|
||||
err = mtk_pcie_register_host(host);
|
||||
if (err)
|
||||
goto put_resources;
|
||||
|
||||
return 0;
|
||||
|
||||
put_resources:
|
||||
if (!list_empty(&pcie->ports))
|
||||
mtk_pcie_put_resources(pcie);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static const struct of_device_id mtk_pcie_ids[] = {
|
||||
{ .compatible = "mediatek,mt7623-pcie"},
|
||||
{ .compatible = "mediatek,mt2701-pcie"},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct platform_driver mtk_pcie_driver = {
|
||||
.probe = mtk_pcie_probe,
|
||||
.driver = {
|
||||
.name = "mtk-pcie",
|
||||
.of_match_table = mtk_pcie_ids,
|
||||
.suppress_bind_attrs = true,
|
||||
},
|
||||
};
|
||||
builtin_platform_driver(mtk_pcie_driver);
|
||||
Loading…
Reference in New Issue
Block a user