Merge branch 'pci/host-faraday' into next
* pci/host-faraday: PCI: faraday: Add Faraday Technology FTPCI100 PCI Host Bridge driver PCI: Add DT bindings for Faraday Technology PCI Host Bridge
This commit is contained in:
Bjorn Helgaas
commit
66aa51ce8b
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@ -0,0 +1,129 @@
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Faraday Technology FTPCI100 PCI Host Bridge
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This PCI bridge is found inside that Cortina Systems Gemini SoC platform and
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is a generic IP block from Faraday Technology. It exists in two variants:
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plain and dual PCI. The plain version embeds a cascading interrupt controller
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into the host bridge. The dual version routes the interrupts to the host
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chips interrupt controller.
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The host controller appear on the PCI bus with vendor ID 0x159b (Faraday
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Technology) and product ID 0x4321.
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Mandatory properties:
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- compatible: ranging from specific to generic, should be one of
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"cortina,gemini-pci", "faraday,ftpci100"
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"cortina,gemini-pci-dual", "faraday,ftpci100-dual"
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"faraday,ftpci100"
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"faraday,ftpci100-dual"
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- reg: memory base and size for the host bridge
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- #address-cells: set to <3>
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- #size-cells: set to <2>
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- #interrupt-cells: set to <1>
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- bus-range: set to <0x00 0xff>
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- device_type, set to "pci"
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- ranges: see pci.txt
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- interrupt-map-mask: see pci.txt
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- interrupt-map: see pci.txt
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- dma-ranges: three ranges for the inbound memory region. The ranges must
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be aligned to a 1MB boundary, and may be 1MB, 2MB, 4MB, 8MB, 16MB, 32MB, 64MB,
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128MB, 256MB, 512MB, 1GB or 2GB in size. The memory should be marked as
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pre-fetchable.
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Mandatory subnodes:
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- For "faraday,ftpci100" a node representing the interrupt-controller inside the
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host bridge is mandatory. It has the following mandatory properties:
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- interrupt: see interrupt-controller/interrupts.txt
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- interrupt-parent: see interrupt-controller/interrupts.txt
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- interrupt-controller: see interrupt-controller/interrupts.txt
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- #address-cells: set to <0>
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- #interrupt-cells: set to <1>
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I/O space considerations:
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The plain variant has 128MiB of non-prefetchable memory space, whereas the
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"dual" variant has 64MiB. Take this into account when describing the ranges.
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Interrupt map considerations:
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The "dual" variant will get INT A, B, C, D from the system interrupt controller
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and should point to respective interrupt in that controller in its
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interrupt-map.
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The code which is the only documentation of how the Faraday PCI (the non-dual
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variant) interrupts assigns the default interrupt mapping/swizzling has
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typically been like this, doing the swizzling on the interrupt controller side
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rather than in the interconnect:
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interrupt-map-mask = <0xf800 0 0 7>;
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interrupt-map =
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<0x4800 0 0 1 &pci_intc 0>, /* Slot 9 */
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<0x4800 0 0 2 &pci_intc 1>,
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<0x4800 0 0 3 &pci_intc 2>,
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<0x4800 0 0 4 &pci_intc 3>,
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<0x5000 0 0 1 &pci_intc 1>, /* Slot 10 */
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<0x5000 0 0 2 &pci_intc 2>,
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<0x5000 0 0 3 &pci_intc 3>,
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<0x5000 0 0 4 &pci_intc 0>,
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<0x5800 0 0 1 &pci_intc 2>, /* Slot 11 */
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<0x5800 0 0 2 &pci_intc 3>,
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<0x5800 0 0 3 &pci_intc 0>,
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<0x5800 0 0 4 &pci_intc 1>,
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<0x6000 0 0 1 &pci_intc 3>, /* Slot 12 */
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<0x6000 0 0 2 &pci_intc 0>,
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<0x6000 0 0 3 &pci_intc 1>,
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<0x6000 0 0 4 &pci_intc 2>;
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Example:
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pci@50000000 {
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compatible = "cortina,gemini-pci", "faraday,ftpci100";
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reg = <0x50000000 0x100>;
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interrupts = <8 IRQ_TYPE_LEVEL_HIGH>, /* PCI A */
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<26 IRQ_TYPE_LEVEL_HIGH>, /* PCI B */
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<27 IRQ_TYPE_LEVEL_HIGH>, /* PCI C */
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<28 IRQ_TYPE_LEVEL_HIGH>; /* PCI D */
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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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bus-range = <0x00 0xff>;
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ranges = /* 1MiB I/O space 0x50000000-0x500fffff */
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<0x01000000 0 0 0x50000000 0 0x00100000>,
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/* 128MiB non-prefetchable memory 0x58000000-0x5fffffff */
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<0x02000000 0 0x58000000 0x58000000 0 0x08000000>;
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/* DMA ranges */
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dma-ranges =
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/* 128MiB at 0x00000000-0x07ffffff */
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<0x02000000 0 0x00000000 0x00000000 0 0x08000000>,
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/* 64MiB at 0x00000000-0x03ffffff */
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<0x02000000 0 0x00000000 0x00000000 0 0x04000000>,
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/* 64MiB at 0x00000000-0x03ffffff */
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<0x02000000 0 0x00000000 0x00000000 0 0x04000000>;
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interrupt-map-mask = <0xf800 0 0 7>;
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interrupt-map =
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<0x4800 0 0 1 &pci_intc 0>, /* Slot 9 */
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<0x4800 0 0 2 &pci_intc 1>,
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<0x4800 0 0 3 &pci_intc 2>,
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<0x4800 0 0 4 &pci_intc 3>,
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<0x5000 0 0 1 &pci_intc 1>, /* Slot 10 */
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<0x5000 0 0 2 &pci_intc 2>,
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<0x5000 0 0 3 &pci_intc 3>,
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<0x5000 0 0 4 &pci_intc 0>,
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<0x5800 0 0 1 &pci_intc 2>, /* Slot 11 */
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<0x5800 0 0 2 &pci_intc 3>,
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<0x5800 0 0 3 &pci_intc 0>,
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<0x5800 0 0 4 &pci_intc 1>,
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<0x6000 0 0 1 &pci_intc 3>, /* Slot 12 */
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<0x6000 0 0 2 &pci_intc 0>,
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<0x6000 0 0 3 &pci_intc 0>,
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<0x6000 0 0 4 &pci_intc 0>;
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pci_intc: interrupt-controller {
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interrupt-parent = <&intcon>;
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interrupt-controller;
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#address-cells = <0>;
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#interrupt-cells = <1>;
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};
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};
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@ -27,6 +27,12 @@ config PCIE_XILINX_NWL
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or End Point. The current option selection will only
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support root port enabling.
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config PCI_FTPCI100
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bool "Faraday Technology FTPCI100 PCI controller"
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depends on OF
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depends on ARM
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default ARCH_GEMINI
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config PCI_TEGRA
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bool "NVIDIA Tegra PCIe controller"
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depends on ARCH_TEGRA
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@ -1,3 +1,4 @@
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obj-$(CONFIG_PCI_FTPCI100) += pci-ftpci100.o
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obj-$(CONFIG_PCI_HYPERV) += pci-hyperv.o
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obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o
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obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o
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@ -0,0 +1,562 @@
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/*
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* Support for Faraday Technology FTPC100 PCI Controller
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*
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* Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
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*
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* Based on the out-of-tree OpenWRT patch for Cortina Gemini:
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* Copyright (C) 2009 Janos Laube <janos.dev@gmail.com>
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* Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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* Based on SL2312 PCI controller code
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* Storlink (C) 2003
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.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_device.h>
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#include <linux/of_irq.h>
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#include <linux/of_pci.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/irqdomain.h>
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#include <linux/irqchip/chained_irq.h>
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#include <linux/bitops.h>
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#include <linux/irq.h>
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/*
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* Special configuration registers directly in the first few words
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* in I/O space.
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*/
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#define PCI_IOSIZE 0x00
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#define PCI_PROT 0x04 /* AHB protection */
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#define PCI_CTRL 0x08 /* PCI control signal */
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#define PCI_SOFTRST 0x10 /* Soft reset counter and response error enable */
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#define PCI_CONFIG 0x28 /* PCI configuration command register */
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#define PCI_DATA 0x2C
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#define FARADAY_PCI_PMC 0x40 /* Power management control */
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#define FARADAY_PCI_PMCSR 0x44 /* Power management status */
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#define FARADAY_PCI_CTRL1 0x48 /* Control register 1 */
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#define FARADAY_PCI_CTRL2 0x4C /* Control register 2 */
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#define FARADAY_PCI_MEM1_BASE_SIZE 0x50 /* Memory base and size #1 */
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#define FARADAY_PCI_MEM2_BASE_SIZE 0x54 /* Memory base and size #2 */
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#define FARADAY_PCI_MEM3_BASE_SIZE 0x58 /* Memory base and size #3 */
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/* Bits 31..28 gives INTD..INTA status */
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#define PCI_CTRL2_INTSTS_SHIFT 28
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#define PCI_CTRL2_INTMASK_CMDERR BIT(27)
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#define PCI_CTRL2_INTMASK_PARERR BIT(26)
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/* Bits 25..22 masks INTD..INTA */
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#define PCI_CTRL2_INTMASK_SHIFT 22
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#define PCI_CTRL2_INTMASK_MABRT_RX BIT(21)
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#define PCI_CTRL2_INTMASK_TABRT_RX BIT(20)
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#define PCI_CTRL2_INTMASK_TABRT_TX BIT(19)
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#define PCI_CTRL2_INTMASK_RETRY4 BIT(18)
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#define PCI_CTRL2_INTMASK_SERR_RX BIT(17)
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#define PCI_CTRL2_INTMASK_PERR_RX BIT(16)
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/* Bit 15 reserved */
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#define PCI_CTRL2_MSTPRI_REQ6 BIT(14)
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#define PCI_CTRL2_MSTPRI_REQ5 BIT(13)
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#define PCI_CTRL2_MSTPRI_REQ4 BIT(12)
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#define PCI_CTRL2_MSTPRI_REQ3 BIT(11)
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#define PCI_CTRL2_MSTPRI_REQ2 BIT(10)
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#define PCI_CTRL2_MSTPRI_REQ1 BIT(9)
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#define PCI_CTRL2_MSTPRI_REQ0 BIT(8)
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/* Bits 7..4 reserved */
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/* Bits 3..0 TRDYW */
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/*
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* Memory configs:
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* Bit 31..20 defines the PCI side memory base
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* Bit 19..16 (4 bits) defines the size per below
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*/
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#define FARADAY_PCI_MEMBASE_MASK 0xfff00000
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#define FARADAY_PCI_MEMSIZE_1MB 0x0
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#define FARADAY_PCI_MEMSIZE_2MB 0x1
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#define FARADAY_PCI_MEMSIZE_4MB 0x2
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#define FARADAY_PCI_MEMSIZE_8MB 0x3
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#define FARADAY_PCI_MEMSIZE_16MB 0x4
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#define FARADAY_PCI_MEMSIZE_32MB 0x5
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#define FARADAY_PCI_MEMSIZE_64MB 0x6
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#define FARADAY_PCI_MEMSIZE_128MB 0x7
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#define FARADAY_PCI_MEMSIZE_256MB 0x8
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#define FARADAY_PCI_MEMSIZE_512MB 0x9
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#define FARADAY_PCI_MEMSIZE_1GB 0xa
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#define FARADAY_PCI_MEMSIZE_2GB 0xb
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#define FARADAY_PCI_MEMSIZE_SHIFT 16
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/*
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* The DMA base is set to 0x0 for all memory segments, it reflects the
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* fact that the memory of the host system starts at 0x0.
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*/
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#define FARADAY_PCI_DMA_MEM1_BASE 0x00000000
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#define FARADAY_PCI_DMA_MEM2_BASE 0x00000000
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#define FARADAY_PCI_DMA_MEM3_BASE 0x00000000
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/* Defines for PCI configuration command register */
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#define PCI_CONF_ENABLE BIT(31)
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#define PCI_CONF_WHERE(r) ((r) & 0xFC)
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#define PCI_CONF_BUS(b) (((b) & 0xFF) << 16)
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#define PCI_CONF_DEVICE(d) (((d) & 0x1F) << 11)
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#define PCI_CONF_FUNCTION(f) (((f) & 0x07) << 8)
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/**
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* struct faraday_pci_variant - encodes IP block differences
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* @cascaded_irq: this host has cascaded IRQs from an interrupt controller
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* embedded in the host bridge.
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*/
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struct faraday_pci_variant {
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bool cascaded_irq;
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};
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struct faraday_pci {
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struct device *dev;
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void __iomem *base;
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struct irq_domain *irqdomain;
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struct pci_bus *bus;
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};
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static int faraday_res_to_memcfg(resource_size_t mem_base,
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resource_size_t mem_size, u32 *val)
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{
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u32 outval;
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switch (mem_size) {
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case SZ_1M:
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outval = FARADAY_PCI_MEMSIZE_1MB;
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break;
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case SZ_2M:
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outval = FARADAY_PCI_MEMSIZE_2MB;
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break;
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case SZ_4M:
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outval = FARADAY_PCI_MEMSIZE_4MB;
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break;
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case SZ_8M:
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outval = FARADAY_PCI_MEMSIZE_8MB;
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break;
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case SZ_16M:
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outval = FARADAY_PCI_MEMSIZE_16MB;
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break;
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case SZ_32M:
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outval = FARADAY_PCI_MEMSIZE_32MB;
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break;
|
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case SZ_64M:
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outval = FARADAY_PCI_MEMSIZE_64MB;
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break;
|
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case SZ_128M:
|
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outval = FARADAY_PCI_MEMSIZE_128MB;
|
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break;
|
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case SZ_256M:
|
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outval = FARADAY_PCI_MEMSIZE_256MB;
|
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break;
|
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case SZ_512M:
|
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outval = FARADAY_PCI_MEMSIZE_512MB;
|
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break;
|
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case SZ_1G:
|
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outval = FARADAY_PCI_MEMSIZE_1GB;
|
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break;
|
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case SZ_2G:
|
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outval = FARADAY_PCI_MEMSIZE_2GB;
|
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break;
|
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default:
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return -EINVAL;
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}
|
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outval <<= FARADAY_PCI_MEMSIZE_SHIFT;
|
||||
|
||||
/* This is probably not good */
|
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if (mem_base & ~(FARADAY_PCI_MEMBASE_MASK))
|
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pr_warn("truncated PCI memory base\n");
|
||||
/* Translate to bridge side address space */
|
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outval |= (mem_base & FARADAY_PCI_MEMBASE_MASK);
|
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pr_debug("Translated pci base @%pap, size %pap to config %08x\n",
|
||||
&mem_base, &mem_size, outval);
|
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|
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*val = outval;
|
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return 0;
|
||||
}
|
||||
|
||||
static int faraday_pci_read_config(struct pci_bus *bus, unsigned int fn,
|
||||
int config, int size, u32 *value)
|
||||
{
|
||||
struct faraday_pci *p = bus->sysdata;
|
||||
|
||||
writel(PCI_CONF_BUS(bus->number) |
|
||||
PCI_CONF_DEVICE(PCI_SLOT(fn)) |
|
||||
PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
|
||||
PCI_CONF_WHERE(config) |
|
||||
PCI_CONF_ENABLE,
|
||||
p->base + PCI_CONFIG);
|
||||
|
||||
*value = readl(p->base + PCI_DATA);
|
||||
|
||||
if (size == 1)
|
||||
*value = (*value >> (8 * (config & 3))) & 0xFF;
|
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else if (size == 2)
|
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*value = (*value >> (8 * (config & 3))) & 0xFFFF;
|
||||
|
||||
dev_dbg(&bus->dev,
|
||||
"[read] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
|
||||
PCI_SLOT(fn), PCI_FUNC(fn), config, size, *value);
|
||||
|
||||
return PCIBIOS_SUCCESSFUL;
|
||||
}
|
||||
|
||||
static int faraday_pci_write_config(struct pci_bus *bus, unsigned int fn,
|
||||
int config, int size, u32 value)
|
||||
{
|
||||
struct faraday_pci *p = bus->sysdata;
|
||||
int ret = PCIBIOS_SUCCESSFUL;
|
||||
|
||||
dev_dbg(&bus->dev,
|
||||
"[write] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
|
||||
PCI_SLOT(fn), PCI_FUNC(fn), config, size, value);
|
||||
|
||||
writel(PCI_CONF_BUS(bus->number) |
|
||||
PCI_CONF_DEVICE(PCI_SLOT(fn)) |
|
||||
PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
|
||||
PCI_CONF_WHERE(config) |
|
||||
PCI_CONF_ENABLE,
|
||||
p->base + PCI_CONFIG);
|
||||
|
||||
switch (size) {
|
||||
case 4:
|
||||
writel(value, p->base + PCI_DATA);
|
||||
break;
|
||||
case 2:
|
||||
writew(value, p->base + PCI_DATA + (config & 3));
|
||||
break;
|
||||
case 1:
|
||||
writeb(value, p->base + PCI_DATA + (config & 3));
|
||||
break;
|
||||
default:
|
||||
ret = PCIBIOS_BAD_REGISTER_NUMBER;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct pci_ops faraday_pci_ops = {
|
||||
.read = faraday_pci_read_config,
|
||||
.write = faraday_pci_write_config,
|
||||
};
|
||||
|
||||
static void faraday_pci_ack_irq(struct irq_data *d)
|
||||
{
|
||||
struct faraday_pci *p = irq_data_get_irq_chip_data(d);
|
||||
unsigned int reg;
|
||||
|
||||
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, ®);
|
||||
reg &= ~(0xF << PCI_CTRL2_INTSTS_SHIFT);
|
||||
reg |= BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTSTS_SHIFT);
|
||||
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, reg);
|
||||
}
|
||||
|
||||
static void faraday_pci_mask_irq(struct irq_data *d)
|
||||
{
|
||||
struct faraday_pci *p = irq_data_get_irq_chip_data(d);
|
||||
unsigned int reg;
|
||||
|
||||
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, ®);
|
||||
reg &= ~((0xF << PCI_CTRL2_INTSTS_SHIFT)
|
||||
| BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTMASK_SHIFT));
|
||||
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, reg);
|
||||
}
|
||||
|
||||
static void faraday_pci_unmask_irq(struct irq_data *d)
|
||||
{
|
||||
struct faraday_pci *p = irq_data_get_irq_chip_data(d);
|
||||
unsigned int reg;
|
||||
|
||||
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, ®);
|
||||
reg &= ~(0xF << PCI_CTRL2_INTSTS_SHIFT);
|
||||
reg |= BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTMASK_SHIFT);
|
||||
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, reg);
|
||||
}
|
||||
|
||||
static void faraday_pci_irq_handler(struct irq_desc *desc)
|
||||
{
|
||||
struct faraday_pci *p = irq_desc_get_handler_data(desc);
|
||||
struct irq_chip *irqchip = irq_desc_get_chip(desc);
|
||||
unsigned int irq_stat, reg, i;
|
||||
|
||||
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, ®);
|
||||
irq_stat = reg >> PCI_CTRL2_INTSTS_SHIFT;
|
||||
|
||||
chained_irq_enter(irqchip, desc);
|
||||
|
||||
for (i = 0; i < 4; i++) {
|
||||
if ((irq_stat & BIT(i)) == 0)
|
||||
continue;
|
||||
generic_handle_irq(irq_find_mapping(p->irqdomain, i));
|
||||
}
|
||||
|
||||
chained_irq_exit(irqchip, desc);
|
||||
}
|
||||
|
||||
static struct irq_chip faraday_pci_irq_chip = {
|
||||
.name = "PCI",
|
||||
.irq_ack = faraday_pci_ack_irq,
|
||||
.irq_mask = faraday_pci_mask_irq,
|
||||
.irq_unmask = faraday_pci_unmask_irq,
|
||||
};
|
||||
|
||||
static int faraday_pci_irq_map(struct irq_domain *domain, unsigned int irq,
|
||||
irq_hw_number_t hwirq)
|
||||
{
|
||||
irq_set_chip_and_handler(irq, &faraday_pci_irq_chip, handle_level_irq);
|
||||
irq_set_chip_data(irq, domain->host_data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct irq_domain_ops faraday_pci_irqdomain_ops = {
|
||||
.map = faraday_pci_irq_map,
|
||||
};
|
||||
|
||||
static int faraday_pci_setup_cascaded_irq(struct faraday_pci *p)
|
||||
{
|
||||
struct device_node *intc = of_get_next_child(p->dev->of_node, NULL);
|
||||
int irq;
|
||||
int i;
|
||||
|
||||
if (!intc) {
|
||||
dev_err(p->dev, "missing child interrupt-controller node\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* All PCI IRQs cascade off this one */
|
||||
irq = of_irq_get(intc, 0);
|
||||
if (!irq) {
|
||||
dev_err(p->dev, "failed to get parent IRQ\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
p->irqdomain = irq_domain_add_linear(intc, 4,
|
||||
&faraday_pci_irqdomain_ops, p);
|
||||
if (!p->irqdomain) {
|
||||
dev_err(p->dev, "failed to create Gemini PCI IRQ domain\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
irq_set_chained_handler_and_data(irq, faraday_pci_irq_handler, p);
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
irq_create_mapping(p->irqdomain, i);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pci_dma_range_parser_init(struct of_pci_range_parser *parser,
|
||||
struct device_node *node)
|
||||
{
|
||||
const int na = 3, ns = 2;
|
||||
int rlen;
|
||||
|
||||
parser->node = node;
|
||||
parser->pna = of_n_addr_cells(node);
|
||||
parser->np = parser->pna + na + ns;
|
||||
|
||||
parser->range = of_get_property(node, "dma-ranges", &rlen);
|
||||
if (!parser->range)
|
||||
return -ENOENT;
|
||||
parser->end = parser->range + rlen / sizeof(__be32);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int faraday_pci_parse_map_dma_ranges(struct faraday_pci *p,
|
||||
struct device_node *np)
|
||||
{
|
||||
struct of_pci_range range;
|
||||
struct of_pci_range_parser parser;
|
||||
struct device *dev = p->dev;
|
||||
u32 confreg[3] = {
|
||||
FARADAY_PCI_MEM1_BASE_SIZE,
|
||||
FARADAY_PCI_MEM2_BASE_SIZE,
|
||||
FARADAY_PCI_MEM3_BASE_SIZE,
|
||||
};
|
||||
int i = 0;
|
||||
u32 val;
|
||||
|
||||
if (pci_dma_range_parser_init(&parser, np)) {
|
||||
dev_err(dev, "missing dma-ranges property\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Get the dma-ranges from the device tree
|
||||
*/
|
||||
for_each_of_pci_range(&parser, &range) {
|
||||
u64 end = range.pci_addr + range.size - 1;
|
||||
int ret;
|
||||
|
||||
ret = faraday_res_to_memcfg(range.pci_addr, range.size, &val);
|
||||
if (ret) {
|
||||
dev_err(dev,
|
||||
"DMA range %d: illegal MEM resource size\n", i);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
dev_info(dev, "DMA MEM%d BASE: 0x%016llx -> 0x%016llx config %08x\n",
|
||||
i + 1, range.pci_addr, end, val);
|
||||
if (i <= 2) {
|
||||
faraday_pci_write_config(p->bus, 0, confreg[i],
|
||||
4, val);
|
||||
} else {
|
||||
dev_err(dev, "ignore extraneous dma-range %d\n", i);
|
||||
break;
|
||||
}
|
||||
|
||||
i++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int faraday_pci_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
const struct faraday_pci_variant *variant =
|
||||
of_device_get_match_data(dev);
|
||||
struct resource *regs;
|
||||
resource_size_t io_base;
|
||||
struct resource_entry *win;
|
||||
struct faraday_pci *p;
|
||||
struct resource *mem;
|
||||
struct resource *io;
|
||||
struct pci_host_bridge *host;
|
||||
int ret;
|
||||
u32 val;
|
||||
LIST_HEAD(res);
|
||||
|
||||
host = pci_alloc_host_bridge(sizeof(*p));
|
||||
if (!host)
|
||||
return -ENOMEM;
|
||||
|
||||
host->dev.parent = dev;
|
||||
host->ops = &faraday_pci_ops;
|
||||
host->busnr = 0;
|
||||
host->msi = NULL;
|
||||
p = pci_host_bridge_priv(host);
|
||||
host->sysdata = p;
|
||||
p->dev = dev;
|
||||
|
||||
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
p->base = devm_ioremap_resource(dev, regs);
|
||||
if (IS_ERR(p->base))
|
||||
return PTR_ERR(p->base);
|
||||
|
||||
ret = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
|
||||
&res, &io_base);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = devm_request_pci_bus_resources(dev, &res);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Get the I/O and memory ranges from DT */
|
||||
resource_list_for_each_entry(win, &res) {
|
||||
switch (resource_type(win->res)) {
|
||||
case IORESOURCE_IO:
|
||||
io = win->res;
|
||||
io->name = "Gemini PCI I/O";
|
||||
if (!faraday_res_to_memcfg(io->start - win->offset,
|
||||
resource_size(io), &val)) {
|
||||
/* setup I/O space size */
|
||||
writel(val, p->base + PCI_IOSIZE);
|
||||
} else {
|
||||
dev_err(dev, "illegal IO mem size\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
ret = pci_remap_iospace(io, io_base);
|
||||
if (ret) {
|
||||
dev_warn(dev, "error %d: failed to map resource %pR\n",
|
||||
ret, io);
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
case IORESOURCE_MEM:
|
||||
mem = win->res;
|
||||
mem->name = "Gemini PCI MEM";
|
||||
break;
|
||||
case IORESOURCE_BUS:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Setup hostbridge */
|
||||
val = readl(p->base + PCI_CTRL);
|
||||
val |= PCI_COMMAND_IO;
|
||||
val |= PCI_COMMAND_MEMORY;
|
||||
val |= PCI_COMMAND_MASTER;
|
||||
writel(val, p->base + PCI_CTRL);
|
||||
|
||||
list_splice_init(&res, &host->windows);
|
||||
ret = pci_register_host_bridge(host);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to register host: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
p->bus = host->bus;
|
||||
|
||||
/* Mask and clear all interrupts */
|
||||
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2 + 2, 2, 0xF000);
|
||||
if (variant->cascaded_irq) {
|
||||
ret = faraday_pci_setup_cascaded_irq(p);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to setup cascaded IRQ\n");
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
ret = faraday_pci_parse_map_dma_ranges(p, dev->of_node);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
pci_scan_child_bus(p->bus);
|
||||
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
|
||||
pci_bus_assign_resources(p->bus);
|
||||
pci_bus_add_devices(p->bus);
|
||||
pci_free_resource_list(&res);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* We encode bridge variants here, we have at least two so it doesn't
|
||||
* hurt to have infrastructure to encompass future variants as well.
|
||||
*/
|
||||
const struct faraday_pci_variant faraday_regular = {
|
||||
.cascaded_irq = true,
|
||||
};
|
||||
|
||||
const struct faraday_pci_variant faraday_dual = {
|
||||
.cascaded_irq = false,
|
||||
};
|
||||
|
||||
static const struct of_device_id faraday_pci_of_match[] = {
|
||||
{
|
||||
.compatible = "faraday,ftpci100",
|
||||
.data = &faraday_regular,
|
||||
},
|
||||
{
|
||||
.compatible = "faraday,ftpci100-dual",
|
||||
.data = &faraday_dual,
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct platform_driver faraday_pci_driver = {
|
||||
.driver = {
|
||||
.name = "ftpci100",
|
||||
.of_match_table = of_match_ptr(faraday_pci_of_match),
|
||||
},
|
||||
.probe = faraday_pci_probe,
|
||||
};
|
||||
builtin_platform_driver(faraday_pci_driver);
|
||||
Loading…
Reference in New Issue