linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH V5 0/3] ARM64 LPC: legacy ISA I/O support
@ 2016-11-08  3:47 zhichang.yuan
  2016-11-08  3:47 ` [PATCH V5 1/3] ARM64 LPC: Indirect ISA port IO introduced zhichang.yuan
                   ` (2 more replies)
  0 siblings, 3 replies; 83+ messages in thread
From: zhichang.yuan @ 2016-11-08  3:47 UTC (permalink / raw)
  To: catalin.marinas, will.deacon, robh+dt, bhelgaas, mark.rutland,
	olof, arnd, linux-arm-kernel
  Cc: lorenzo.pieralisi, linux-kernel, linuxarm, devicetree, linux-pci,
	linux-serial, minyard, benh, liviu.dudau, zourongrong,
	john.garry, gabriele.paoloni, zhichang.yuan02, kantyzc, xuwei5,
	zhichang.yuan

This patch supports the IPMI-bt device attached to the Low-Pin-Count interface
implemented on Hisilicon Hip06 SoC.
	                -----------
			| LPC host|
	                |         |
	                -----------
	                     |
 	        _____________V_______________LPC
                  |			  |
                  V	                  V
			             ------------
			             |  BT(ipmi)|
			             ------------

When master accesses those periperals beneath the Hip06 LPC, a specific LPC
driver is needed to make LPC host generate the standard LPC I/O cycles with
the target periperals'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
unchanged, 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 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;

Signed-off-by: Zhichang Yuan <yuanzhichang@hisilicon.com>

zhichang.yuan (3):
  ARM64 LPC: Indirect ISA port IO introduced
  ARM64 LPC: Add missing range exception for special ISA
  ARM64 LPC: LPC driver implementation on Hip06

 .../arm/hisilicon/hisilicon-low-pin-count.txt      |  31 ++
 MAINTAINERS                                        |   8 +
 arch/arm64/Kconfig                                 |   6 +
 arch/arm64/include/asm/extio.h                     |  94 ++++
 arch/arm64/include/asm/io.h                        |  35 ++
 arch/arm64/kernel/Makefile                         |   1 +
 arch/arm64/kernel/extio.c                          |  52 +++
 drivers/bus/Kconfig                                |   8 +
 drivers/bus/Makefile                               |   1 +
 drivers/bus/hisi_lpc.c                             | 501 +++++++++++++++++++++
 drivers/of/address.c                               |  56 ++-
 drivers/pci/pci.c                                  |   6 +-
 include/linux/of_address.h                         |  17 +
 include/linux/pci.h                                |   8 +
 14 files changed, 820 insertions(+), 4 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt
 create mode 100644 arch/arm64/include/asm/extio.h
 create mode 100644 arch/arm64/kernel/extio.c
 create mode 100644 drivers/bus/hisi_lpc.c

-- 
1.9.1

^ permalink raw reply	[flat|nested] 83+ messages in thread

end of thread, other threads:[~2017-01-06 11:44 UTC | newest]

Thread overview: 83+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-11-08  3:47 [PATCH V5 0/3] ARM64 LPC: legacy ISA I/O support zhichang.yuan
2016-11-08  3:47 ` [PATCH V5 1/3] ARM64 LPC: Indirect ISA port IO introduced zhichang.yuan
2016-11-08 12:03   ` Mark Rutland
2016-11-08 16:09     ` Arnd Bergmann
2016-11-08 16:15       ` Arnd Bergmann
2016-11-08 23:16     ` Benjamin Herrenschmidt
2016-11-10  8:33       ` zhichang.yuan
2016-11-10 11:22       ` Mark Rutland
2016-11-10 19:32         ` Benjamin Herrenschmidt
2016-11-11 10:07           ` zhichang.yuan
2016-11-18  9:20             ` Arnd Bergmann
2016-11-18 11:12               ` zhichang.yuan
2016-11-18 11:38                 ` Arnd Bergmann
2016-11-21 12:58       ` John Garry
2016-11-08 16:12   ` Will Deacon
2016-11-08 16:33     ` John Garry
2016-11-08 16:49       ` Will Deacon
2016-11-08 17:05         ` John Garry
2016-11-08 22:35         ` Arnd Bergmann
2016-11-09 11:29           ` John Garry
2016-11-09 21:33             ` Arnd Bergmann
2016-12-22  8:15   ` Ming Lei
2016-12-23  1:43     ` zhichang.yuan
2016-12-23  7:24       ` Ming Lei
2017-01-06 11:43     ` Arnd Bergmann
2016-11-08  3:47 ` [PATCH V5 2/3] ARM64 LPC: Add missing range exception for special ISA zhichang.yuan
2016-11-08  5:17   ` kbuild test robot
2016-11-08  5:27   ` kbuild test robot
2016-11-08 11:49   ` Mark Rutland
2016-11-08 16:19     ` Arnd Bergmann
2016-11-08 17:10       ` Mark Rutland
2016-11-09 13:54       ` One Thousand Gnomes
2016-11-09 14:51         ` Gabriele Paoloni
2016-11-09 21:38         ` Arnd Bergmann
2016-11-14 11:11           ` One Thousand Gnomes
2016-11-18  9:22             ` Arnd Bergmann
2016-11-08 23:12     ` Benjamin Herrenschmidt
2016-11-09 11:20       ` Mark Rutland
2016-11-10  7:08         ` Benjamin Herrenschmidt
2016-11-09 11:39   ` liviu.dudau
2016-11-09 16:16     ` Gabriele Paoloni
2016-11-09 16:50       ` liviu.dudau
2016-11-10  6:24         ` zhichang.yuan
2016-11-10 16:06         ` Gabriele Paoloni
2016-11-11 10:37           ` liviu.dudau
2016-11-08  3:47 ` [PATCH V5 3/3] ARM64 LPC: LPC driver implementation on Hip06 zhichang.yuan
2016-11-08  6:11   ` kbuild test robot
2016-11-08 16:24   ` Arnd Bergmann
2016-11-09 12:10     ` Gabriele Paoloni
2016-11-09 21:34       ` Arnd Bergmann
2016-11-10  6:40         ` zhichang.yuan
2016-11-10  9:12           ` Arnd Bergmann
2016-11-10 12:36             ` zhichang.yuan
2016-11-18 11:46               ` Arnd Bergmann
2016-11-10 15:36             ` Gabriele Paoloni
2016-11-10 16:07               ` Arnd Bergmann
2016-11-11 10:09                 ` zhichang.yuan
2016-11-11 10:48                 ` liviu.dudau
2016-11-11 13:39                 ` Gabriele Paoloni
2016-11-11 14:45                   ` liviu.dudau
2016-11-11 15:53                     ` Gabriele Paoloni
2016-11-11 18:16                       ` liviu.dudau
2016-11-14  8:26                         ` Gabriele Paoloni
2016-11-14 11:26                           ` liviu.dudau
2016-11-18 10:17                             ` Arnd Bergmann
2016-11-18 12:07                               ` Gabriele Paoloni
2016-11-18 12:24                                 ` Arnd Bergmann
2016-11-18 12:53                                   ` Gabriele Paoloni
2016-11-18 13:42                                     ` Arnd Bergmann
2016-11-18 16:18                                       ` Gabriele Paoloni
2016-11-18 16:34                                         ` Arnd Bergmann
2016-11-18 17:03                                           ` Gabriele Paoloni
2016-11-23 14:16                                             ` Arnd Bergmann
2016-11-23 15:22                                               ` Gabriele Paoloni
2016-11-23 17:07                                                 ` Arnd Bergmann
2016-11-23 23:23                                                   ` Arnd Bergmann
2016-11-24  9:12                                                     ` zhichang.yuan
2016-11-24 10:24                                                       ` Arnd Bergmann
2016-11-25  8:46                                                     ` Gabriele Paoloni
2016-11-25 12:03                                                       ` Arnd Bergmann
2016-11-25 16:27                                                         ` Gabriele Paoloni
2016-11-11 16:54                     ` zhichang.yuan
2016-11-14 11:06         ` One Thousand Gnomes

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).