From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750849AbdAXGdx (ORCPT ); Tue, 24 Jan 2017 01:33:53 -0500 Received: from szxga03-in.huawei.com ([119.145.14.66]:39937 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750703AbdAXGdu (ORCPT ); Tue, 24 Jan 2017 01:33:50 -0500 From: "zhichang.yuan" To: , , , , , , , , , , CC: , , , , , , , , , , , , , , , "zhichang.yuan" Subject: [PATCH V6 0/5] LPC: legacy ISA I/O support Date: Tue, 24 Jan 2017 15:05:20 +0800 Message-ID: <1485241525-201782-1-git-send-email-yuanzhichang@hisilicon.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch supports the IPMI-bt device attached to the Low-Pin-Count interface implemented on Hisilicon Hip06/Hip07 SoC. ----------- | LPC host| | | ----------- | _____________V_______________LPC | | V V ------------ | BT(ipmi)| ------------ When master accesses those peripherals beneath the Hip06 LPC, a specific LPC driver is needed to make LPC host generate the standard LPC I/O cycles with the target peripherals'I/O port addresses. But on curent arm64 world, there is no real I/O accesses. All the I/O operations through in/out pair are based on MMIO which is not satisfied the I/O mechanism on Hip06 LPC. To solve this issue and keep the relevant existing peripherals' driver untouched, this patch set redefines the in/out() pair to support both the IO operations for Hip06 LPC and the original MMIO. The way specific to Hip06 is named as indirect-IO in this patchset. Changes from V5: - Made the extio driver more generic and locate in lib/; - Supported multiple indirect-IO bus instances; - Extended the pci_register_io_range() to support indirect-IO, then dropped the I/O reservation used in previous patchset; - Reimplemented the ACPI LPC support; - Fixed some bugs, including the compile error on other archs, the module building failure found by Ming Lei, etc; Changes from V4: - Some revises based on the comments from Bjorn, Rob on V4; - Fixed the compile error on some platforms, such as openrisc; Changes from V3: - UART support deferred to a separate patchset; This patchset only support ipmi device under LPC; - LPC bus I/O range is fixed to 0 ~ (PCIBIOS_MIN_IO - 1), which is separeted from PCI/PCIE PIO space; - Based on Arnd's remarks, removed the ranges property from Hip06 lpc dts and added a new fixup function, of_isa_indirect_io(), to get the I/O address directly from LPC dts configurations; - Support in(w,l)/out(w,l) for Hip06 lpc I/O; - Decouple the header file dependency on the gerenic io.h by defining in/out as normal functions in c file; - removed unused macro definitions in the LPC driver; Changes from V2: - Support the PIO retrieval from the linux PIO generated by pci_address_to_pio. This method replace the 4K PIO reservation in V2; - Support the flat-tree earlycon; - Some revises based on Arnd's remarks; - Make sure the linux PIO range allocated to Hip06 LPC peripherals starts from non-ZERO; Changes from V1: - Support the ACPI LPC device; - Optimize the dts LPC driver in ISA compatible mode; - Reserve the IO range below 4K in avoid the possible conflict with PCI host IO ranges; - Support the LPC uart and relevant earlycon; v5 thread here: https://lkml.org/lkml/2016/11/7/955 v4 thread here: https://lkml.org/lkml/2016/10/20/149 v3 thread here: https://lkml.org/lkml/2016/9/14/326 v2 thread here: https://lkml.org/lkml/2016/9/7/356 v1 thread here: https://lkml.org/lkml/2015/12/29/154 Signed-off-by: Zhichang Yuan zhichang.yuan (5): LIB: Indirect ISA/LPC port IO introduced PCI: Adapt pci_register_io_range() for indirect-IO and PCI I/O translation OF: Add missing I/O range exception for indirect-IO devices LPC: Support the device-tree LPC host on Hip06/Hip07 LPC: Add the ACPI LPC support .../arm/hisilicon/hisilicon-low-pin-count.txt | 33 ++ MAINTAINERS | 9 + arch/arm64/boot/dts/hisilicon/hip06-d03.dts | 4 + arch/arm64/boot/dts/hisilicon/hip06.dtsi | 14 + drivers/acpi/pci_root.c | 12 +- drivers/bus/Kconfig | 8 + drivers/bus/Makefile | 1 + drivers/bus/hisi_lpc.c | 625 +++++++++++++++++++++ drivers/of/address.c | 95 +++- drivers/pci/pci.c | 44 +- include/asm-generic/io.h | 50 ++ include/linux/extio.h | 89 +++ include/linux/io.h | 1 + include/linux/pci.h | 7 +- lib/Kconfig | 8 + lib/Makefile | 2 + lib/extio.c | 375 +++++++++++++ 17 files changed, 1342 insertions(+), 35 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt create mode 100644 drivers/bus/hisi_lpc.c create mode 100644 include/linux/extio.h create mode 100644 lib/extio.c -- 1.9.1