Commit Graph

7212 Commits

Author SHA1 Message Date
Linus Torvalds dcf3c935dd This pull request contains the following changes for UML:
- Support for optimized routines based on the host CPU
 - Support for PCI via virtio
 - Various fixes
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Merge tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - Support for optimized routines based on the host CPU

 - Support for PCI via virtio

 - Various fixes

* tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: remove unneeded semicolon in um_arch.c
  um: Remove the repeated declaration
  um: fix error return code in winch_tramp()
  um: fix error return code in slip_open()
  um: Fix stack pointer alignment
  um: implement flush_cache_vmap/flush_cache_vunmap
  um: add a UML specific futex implementation
  um: enable the use of optimized xor routines in UML
  um: Add support for host CPU flags and alignment
  um: allow not setting extra rpaths in the linux binary
  um: virtio/pci: enable suspend/resume
  um: add PCI over virtio emulation driver
  um: irqs: allow invoking time-travel handler multiple times
  um: time-travel/signals: fix ndelay() in interrupt
  um: expose time-travel mode to userspace side
  um: export signals_enabled directly
  um: remove unused smp_sigio_handler() declaration
  lib: add iomem emulation (logic_iomem)
  um: allow disabling NO_IOMEM
2021-07-09 10:19:13 -07:00
Linus Torvalds c932ed0adb TTY / Serial patches for 5.14-rc1
Here is the big set of tty and serial driver patches for 5.14-rc1.
 
 A bit more than normal, but nothing major, lots of cleanups.  Highlights
 are:
 	- lots of tty api cleanups and mxser driver cleanups from Jiri
 	- build warning fixes
 	- various serial driver updates
 	- coding style cleanups
 	- various tty driver minor fixes and updates
 	- removal of broken and disable r3964 line discipline (finally!)
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty / serial updates from Greg KH:
 "Here is the big set of tty and serial driver patches for 5.14-rc1.

  A bit more than normal, but nothing major, lots of cleanups.
  Highlights are:

   - lots of tty api cleanups and mxser driver cleanups from Jiri

   - build warning fixes

   - various serial driver updates

   - coding style cleanups

   - various tty driver minor fixes and updates

   - removal of broken and disable r3964 line discipline (finally!)

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (227 commits)
  serial: mvebu-uart: remove unused member nb from struct mvebu_uart
  arm64: dts: marvell: armada-37xx: Fix reg for standard variant of UART
  dt-bindings: mvebu-uart: fix documentation
  serial: mvebu-uart: correctly calculate minimal possible baudrate
  serial: mvebu-uart: do not allow changing baudrate when uartclk is not available
  serial: mvebu-uart: fix calculation of clock divisor
  tty: make linux/tty_flip.h self-contained
  serial: Prefer unsigned int to bare use of unsigned
  serial: 8250: 8250_omap: Fix possible interrupt storm on K3 SoCs
  serial: qcom_geni_serial: use DT aliases according to DT bindings
  Revert "tty: serial: Add UART driver for Cortina-Access platform"
  tty: serial: Add UART driver for Cortina-Access platform
  MAINTAINERS: add me back as mxser maintainer
  mxser: Documentation, fix typos
  mxser: Documentation, make the docs up-to-date
  mxser: Documentation, remove traces of callout device
  mxser: introduce mxser_16550A_or_MUST helper
  mxser: rename flags to old_speed in mxser_set_serial_info
  mxser: use port variable in mxser_set_serial_info
  mxser: access info->MCR under info->slock
  ...
2021-07-05 14:08:24 -07:00
Linus Torvalds f5c13f1fde Driver core changes for 5.14-rc1
Here is the small set of driver core and debugfs updates for 5.14-rc1.
 
 Included in here are:
 	- debugfs api cleanups (touched some drivers)
 	- devres updates
 	- tiny driver core updates and tweaks
 
 Nothing major in here at all, and all have been in linux-next for a
 while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core changes from Greg KH:
 "Here is the small set of driver core and debugfs updates for 5.14-rc1.

  Included in here are:

   - debugfs api cleanups (touched some drivers)

   - devres updates

   - tiny driver core updates and tweaks

  Nothing major in here at all, and all have been in linux-next for a
  while with no reported issues"

* tag 'driver-core-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (27 commits)
  docs: ABI: testing: sysfs-firmware-memmap: add some memmap types.
  devres: Enable trace events
  devres: No need to call remove_nodes() when there none present
  devres: Use list_for_each_safe_from() in remove_nodes()
  devres: Make locking straight forward in release_nodes()
  kernfs: move revalidate to be near lookup
  drivers/base: Constify static attribute_group structs
  firmware_loader: remove unneeded 'comma' macro
  devcoredump: remove contact information
  driver core: Drop helper devm_platform_ioremap_resource_wc()
  component: Rename 'dev' to 'parent'
  component: Drop 'dev' argument to component_match_realloc()
  device property: Don't check for NULL twice in the loops
  driver core: auxiliary bus: Fix typo in the docs
  drivers/base/node.c: make CACHE_ATTR define static DEVICE_ATTR_RO
  debugfs: remove return value of debugfs_create_ulong()
  debugfs: remove return value of debugfs_create_bool()
  scsi: snic: debugfs: remove local storage of debugfs files
  b43: don't save dentries for debugfs
  b43legacy: don't save dentries for debugfs
  ...
2021-07-05 13:51:41 -07:00
Linus Torvalds eed0218e8c Char / Misc driver updates for 5.14-rc1
Here is the big set of char / misc and other driver subsystem updates
 for 5.14-rc1.  Included in here are:
 	- habanna driver updates
 	- fsl-mc driver updates
 	- comedi driver updates
 	- fpga driver updates
 	- extcon driver updates
 	- interconnect driver updates
 	- mei driver updates
 	- nvmem driver updates
 	- phy driver updates
 	- pnp driver updates
 	- soundwire driver updates
 	- lots of other tiny driver updates for char and misc drivers
 
 This is looking more and more like the "various driver subsystems mushed
 together" tree...
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver updates from Greg KH:
 "Here is the big set of char / misc and other driver subsystem updates
  for 5.14-rc1. Included in here are:

   - habanalabs driver updates

   - fsl-mc driver updates

   - comedi driver updates

   - fpga driver updates

   - extcon driver updates

   - interconnect driver updates

   - mei driver updates

   - nvmem driver updates

   - phy driver updates

   - pnp driver updates

   - soundwire driver updates

   - lots of other tiny driver updates for char and misc drivers

  This is looking more and more like the "various driver subsystems
  mushed together" tree...

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
  mcb: Use DEFINE_RES_MEM() helper macro and fix the end address
  PNP: moved EXPORT_SYMBOL so that it immediately followed its function/variable
  bus: mhi: pci-generic: Add missing 'pci_disable_pcie_error_reporting()' calls
  bus: mhi: Wait for M2 state during system resume
  bus: mhi: core: Fix power down latency
  intel_th: Wait until port is in reset before programming it
  intel_th: msu: Make contiguous buffers uncached
  intel_th: Remove an unused exit point from intel_th_remove()
  stm class: Spelling fix
  nitro_enclaves: Set Bus Master for the NE PCI device
  misc: ibmasm: Modify matricies to matrices
  misc: vmw_vmci: return the correct errno code
  siox: Simplify error handling via dev_err_probe()
  fpga: machxo2-spi: Address warning about unused variable
  lkdtm/heap: Add init_on_alloc tests
  selftests/lkdtm: Enable various testable CONFIGs
  lkdtm: Add CONFIG hints in errors where possible
  lkdtm: Enable DOUBLE_FAULT on all architectures
  lkdtm/heap: Add vmalloc linear overflow test
  lkdtm/bugs: XFAIL UNALIGNED_LOAD_STORE_WRITE
  ...
2021-07-05 13:42:16 -07:00
Linus Torvalds 2bb919b62f s390 updates for the 5.14 merge window
- Rework inline asm to get rid of error prone "register asm" constructs,
   which are problematic especially when code instrumentation is enabled. In
   particular introduce and use register pair union to allocate even/odd
   register pairs. Unfortunately this breaks compatibility with older
   clang compilers and minimum clang version for s390 has been raised to 13.
   https://lore.kernel.org/linux-next/CAK7LNARuSmPCEy-ak0erPrPTgZdGVypBROFhtw+=3spoGoYsyw@mail.gmail.com/
 
 - Fix gcc 11 warnings, which triggered various minor reworks all over
   the code.
 
 - Add zstd kernel image compression support.
 
 - Rework boot CPU lowcore handling.
 
 - De-duplicate and move kernel memory layout setup logic earlier.
 
 - Few fixes in preparation for FORTIFY_SOURCE performing compile-time
   and run-time field bounds checking for mem functions.
 
 - Remove broken and unused power management support leftovers in s390
   drivers.
 
 - Disable stack-protector for decompressor and purgatory to fix buildroot
   build.
 
 - Fix vt220 sclp console name to match the char device name.
 
 - Enable HAVE_IOREMAP_PROT and add zpci_set_irq()/zpci_clear_irq() in
   zPCI code.
 
 - Remove some implausible WARN_ON_ONCEs and remove arch specific counter
   transaction call backs in favour of default transaction handling in
   perf code.
 
 - Extend/add new uevents for online/config/mode state changes of
   AP card / queue device in zcrypt.
 
 - Minor entry and ccwgroup code improvements.
 
 - Other small various fixes and improvements all over the code.
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Merge tag 's390-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Rework inline asm to get rid of error prone "register asm"
   constructs, which are problematic especially when code
   instrumentation is enabled.

   In particular introduce and use register pair union to allocate
   even/odd register pairs. Unfortunately this breaks compatibility with
   older clang compilers and minimum clang version for s390 has been
   raised to 13.

     https://lore.kernel.org/linux-next/CAK7LNARuSmPCEy-ak0erPrPTgZdGVypBROFhtw+=3spoGoYsyw@mail.gmail.com/

 - Fix gcc 11 warnings, which triggered various minor reworks all over
   the code.

 - Add zstd kernel image compression support.

 - Rework boot CPU lowcore handling.

 - De-duplicate and move kernel memory layout setup logic earlier.

 - Few fixes in preparation for FORTIFY_SOURCE performing compile-time
   and run-time field bounds checking for mem functions.

 - Remove broken and unused power management support leftovers in s390
   drivers.

 - Disable stack-protector for decompressor and purgatory to fix
   buildroot build.

 - Fix vt220 sclp console name to match the char device name.

 - Enable HAVE_IOREMAP_PROT and add zpci_set_irq()/zpci_clear_irq() in
   zPCI code.

 - Remove some implausible WARN_ON_ONCEs and remove arch specific
   counter transaction call backs in favour of default transaction
   handling in perf code.

 - Extend/add new uevents for online/config/mode state changes of AP
   card / queue device in zcrypt.

 - Minor entry and ccwgroup code improvements.

 - Other small various fixes and improvements all over the code.

* tag 's390-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (91 commits)
  s390/dasd: use register pair instead of register asm
  s390/qdio: get rid of register asm
  s390/ioasm: use symbolic names for asm operands
  s390/ioasm: get rid of register asm
  s390/cmf: get rid of register asm
  s390/lib,string: get rid of register asm
  s390/lib,uaccess: get rid of register asm
  s390/string: get rid of register asm
  s390/cmpxchg: use register pair instead of register asm
  s390/mm,pages-states: get rid of register asm
  s390/lib,xor: get rid of register asm
  s390/timex: get rid of register asm
  s390/hypfs: use register pair instead of register asm
  s390/zcrypt: Switch to flexible array member
  s390/speculation: Use statically initialized const for instructions
  virtio/s390: get rid of open-coded kvm hypercall
  s390/pci: add zpci_set_irq()/zpci_clear_irq()
  scripts/min-tool-version.sh: Raise minimum clang version to 13.0.0 for s390
  s390/ipl: use register pair instead of register asm
  s390/mem_detect: fix tprot() program check new psw handling
  ...
2021-07-04 12:17:38 -07:00
Linus Torvalds 019b3fd94b powerpc updates for 5.14
- A big series refactoring parts of our KVM code, and converting some to C.
 
  - Support for ARCH_HAS_SET_MEMORY, and ARCH_HAS_STRICT_MODULE_RWX on some CPUs.
 
  - Support for the Microwatt soft-core.
 
  - Optimisations to our interrupt return path on 64-bit.
 
  - Support for userspace access to the NX GZIP accelerator on PowerVM on Power10.
 
  - Enable KUAP and KUEP by default on 32-bit Book3S CPUs.
 
  - Other smaller features, fixes & cleanups.
 
 Thanks to: Andy Shevchenko, Aneesh Kumar K.V, Arnd Bergmann, Athira Rajeev, Baokun Li,
 Benjamin Herrenschmidt, Bharata B Rao, Christophe Leroy, Daniel Axtens, Daniel Henrique
 Barboza, Finn Thain, Geoff Levand, Haren Myneni, Jason Wang, Jiapeng Chong, Joel Stanley,
 Jordan Niethe, Kajol Jain, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas
 Piggin, Nick Desaulniers, Paul Mackerras, Russell Currey, Sathvika Vasireddy, Shaokun
 Zhang, Stephen Rothwell, Sudeep Holla, Suraj Jitindar Singh, Tom Rix, Vaibhav Jain,
 YueHaibing, Zhang Jianhua, Zhen Lei.
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Merge tag 'powerpc-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - A big series refactoring parts of our KVM code, and converting some
   to C.

 - Support for ARCH_HAS_SET_MEMORY, and ARCH_HAS_STRICT_MODULE_RWX on
   some CPUs.

 - Support for the Microwatt soft-core.

 - Optimisations to our interrupt return path on 64-bit.

 - Support for userspace access to the NX GZIP accelerator on PowerVM on
   Power10.

 - Enable KUAP and KUEP by default on 32-bit Book3S CPUs.

 - Other smaller features, fixes & cleanups.

Thanks to: Andy Shevchenko, Aneesh Kumar K.V, Arnd Bergmann, Athira
Rajeev, Baokun Li, Benjamin Herrenschmidt, Bharata B Rao, Christophe
Leroy, Daniel Axtens, Daniel Henrique Barboza, Finn Thain, Geoff Levand,
Haren Myneni, Jason Wang, Jiapeng Chong, Joel Stanley, Jordan Niethe,
Kajol Jain, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas
Piggin, Nick Desaulniers, Paul Mackerras, Russell Currey, Sathvika
Vasireddy, Shaokun Zhang, Stephen Rothwell, Sudeep Holla, Suraj Jitindar
Singh, Tom Rix, Vaibhav Jain, YueHaibing, Zhang Jianhua, and Zhen Lei.

* tag 'powerpc-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (218 commits)
  powerpc: Only build restart_table.c for 64s
  powerpc/64s: move ret_from_fork etc above __end_soft_masked
  powerpc/64s/interrupt: clean up interrupt return labels
  powerpc/64/interrupt: add missing kprobe annotations on interrupt exit symbols
  powerpc/64: enable MSR[EE] in irq replay pt_regs
  powerpc/64s/interrupt: preserve regs->softe for NMI interrupts
  powerpc/64s: add a table of implicit soft-masked addresses
  powerpc/64e: remove implicit soft-masking and interrupt exit restart logic
  powerpc/64e: fix CONFIG_RELOCATABLE build warnings
  powerpc/64s: fix hash page fault interrupt handler
  powerpc/4xx: Fix setup_kuep() on SMP
  powerpc/32s: Fix setup_{kuap/kuep}() on SMP
  powerpc/interrupt: Use names in check_return_regs_valid()
  powerpc/interrupt: Also use exit_must_hard_disable() on PPC32
  powerpc/sysfs: Replace sizeof(arr)/sizeof(arr[0]) with ARRAY_SIZE
  powerpc/ptrace: Refactor regs_set_return_{msr/ip}
  powerpc/ptrace: Move set_return_regs_changed() before regs_set_return_{msr/ip}
  powerpc/stacktrace: Fix spurious "stale" traces in raise_backtrace_ipi()
  powerpc/pseries/vas: Include irqdomain.h
  powerpc: mark local variables around longjmp as volatile
  ...
2021-07-02 12:54:34 -07:00
Pali Rohár 15279ebe99 serial: mvebu-uart: remove unused member nb from struct mvebu_uart
Member nb in struct mvebu_uart is not set nor read. So remove it completely.

Signed-off-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20210624224909.6350-7-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-25 13:53:51 +02:00
Pali Rohár deeaf96356 serial: mvebu-uart: correctly calculate minimal possible baudrate
For default (x16) scheme which is currently used by mvebu-uart.c driver,
maximal divisor of UART base clock is 1023*16. Therefore there is limit for
minimal supported baudrate. This change calculate it correctly and prevents
setting invalid divisor 0 into hardware registers.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: 68a0db1d7d ("serial: mvebu-uart: add function to change baudrate")
Link: https://lore.kernel.org/r/20210624224909.6350-4-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-25 13:53:32 +02:00
Pali Rohár ecd6b010d8 serial: mvebu-uart: do not allow changing baudrate when uartclk is not available
Testing mvuart->clk for non-error is not enough as mvuart->clk may contain
valid clk pointer but when clk_prepare_enable(mvuart->clk) failed then
port->uartclk is zero.

When mvuart->clk is not available then port->uartclk is zero too.

Parent clock rate port->uartclk is needed to calculate UART clock divisor
and without it is not possible to change baudrate.

So fix test condition when it is possible to change baudrate.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: 68a0db1d7d ("serial: mvebu-uart: add function to change baudrate")
Link: https://lore.kernel.org/r/20210624224909.6350-3-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-25 13:53:20 +02:00
Pali Rohár 9078204ca5 serial: mvebu-uart: fix calculation of clock divisor
The clock divisor should be rounded to the closest value.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: 68a0db1d7d ("serial: mvebu-uart: add function to change baudrate")
Cc: stable@vger.kernel.org # 0e4cf69ede ("serial: mvebu-uart: clarify the baud rate derivation")
Link: https://lore.kernel.org/r/20210624224909.6350-2-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-25 13:53:10 +02:00
Jinchao Wang 5607fa6c3d serial: Prefer unsigned int to bare use of unsigned
Fix checkpatch warnings:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Signed-off-by: Jinchao Wang <wjc@cdjrlc.com>
Link: https://lore.kernel.org/r/20210624021207.58059-1-wjc@cdjrlc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 14:51:45 +02:00
Vignesh Raghavendra b67e830d38 serial: 8250: 8250_omap: Fix possible interrupt storm on K3 SoCs
On K3 family of SoCs (which includes AM654 SoC), it is observed that RX
TIMEOUT is signalled after RX FIFO has been drained, in which case a
dummy read of RX FIFO is required to clear RX TIMEOUT condition.
Otherwise, this would lead to an interrupt storm.

Fix this by introducing UART_RX_TIMEOUT_QUIRK flag and doing a dummy
read in IRQ handler when RX TIMEOUT is reported with no data in RX FIFO.

Fixes: be70874498 ("serial: 8250_omap: Add support for AM654 UART controller")
Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
Tested-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20210622145704.11168-1-vigneshr@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 14:51:33 +02:00
Dmitry Baryshkov 08b0adb1ae serial: qcom_geni_serial: use DT aliases according to DT bindings
Device tree bindings do not specify "hsuart" aliases, instead all serial
ports should use "serial" alias name as noted by Rob Herring [1].
Make qcom_geni_serial driver use "serial" alias and fallback to "hsuart"
if one is not found.

[1] https://lore.kernel.org/linux-arm-msm/6dd1f5cd-03c7-5945-9fa2-1c2698405110@linaro.org/

Cc: Rob Herring <robh+dt@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210621211528.1607516-1-dmitry.baryshkov@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 14:51:28 +02:00
Greg Kroah-Hartman cddd53e8aa Revert "tty: serial: Add UART driver for Cortina-Access platform"
This reverts commit b61c8bf469.  It never
made it to a public mailing list and still needs some work based on the
review comments.  So revert it for now.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/CAMuHMdXA9-ajoAza2JAW5879ECieMm1dbBbKHgJhDa7=3kWu3w@mail.gmail.com
Cc: Jason Li <jason.li@cortina-access.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 14:46:32 +02:00
Julian Wiedmann f3827dc6b0 s390/hvc_iucv: Remove power management support
Power management support was removed for s390 with
commit 394216275c ("s390: remove broken hibernate / power management
support").

Remove the hvc_iucv_driver, but keep the device struct around so that
it can continue to provide the hvc_iucv_dev_attr_groups attributes.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2021-06-18 16:41:22 +02:00
Jason Li b61c8bf469 tty: serial: Add UART driver for Cortina-Access platform
This driver supports Cortina Access UART IP integrated
in most all CAXXXX line of SoCs. Earlycom is also supported

Signed-off-by: Jason Li <jason.li@cortina-access.com>
Link: https://lore.kernel.org/r/20210615165750.31261-1-alex.nemirovsky@cortina-access.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:12:12 +02:00
Jiri Slaby 5d1ea1ad28 mxser: introduce mxser_16550A_or_MUST helper
This check is used in the code on many places. Either in positive or
negative form. So introduce a helper called mxser_16550A_or_MUST for
this purpose. And replace all the occurrences.

This simplifies many ifs in there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-67-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:03 +02:00
Jiri Slaby 06cc52ef82 mxser: rename flags to old_speed in mxser_set_serial_info
Local 'flags' are used to store speed in mxser_set_serial_info, not
actual flags (by doing & ASYNC_SPD_MASK). So rename 'flags' to
'old_speed' (after what it is).

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-66-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:03 +02:00
Jiri Slaby 1b3086b6e6 mxser: use port variable in mxser_set_serial_info
mxser_set_serial_info already defined a local 'port' of type struct
tty_port. So use it in the code everywhere.

This eliminates some text from the code there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-65-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:03 +02:00
Jiri Slaby 202acdaa14 mxser: access info->MCR under info->slock
info->MCR is protected by info->slock all over the code. Extend the lock
in mxser_tiocmget around the info->MCR fetch too.

It likely doesn't change anything, but it's always good to be consistent.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-64-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:03 +02:00
Jiri Slaby 464fbf6c4f mxser: fix typos around enhanced mode
Fix spelling of "enhanced" in macros and comments around them.

While "enchance" comes from the original Moxa's driver, I don't think it
was meant to be that. From the context, they obviously mean "enhanced".

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-63-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:03 +02:00
Jiri Slaby aaa28e9f25 mxser: decrypt FCR values
Currently, some of the values written to FCR are magic constants. But
they are composed of well-defined bits. Use these named macros in place
of the constants.

No changes in objdump -d.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-62-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 265ceff7ae mxser: remove xmit_cnt < 0 tests
mxser_port::xmit_cnt is unsigned, it cannot be negative. Therefore
remove all the xmit_cnt < 0 tests.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-61-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 740165f7ac mxser: introduce and use start/stop_tx helpers
Starting and stopping TX is performed on many places in the driver. It
is repeated outb and info->IER modification.  Create few helpers
(__mxser_start_tx, mxser_start_tx, __mxser_stop_tx) and use them in the
code instead of open coding.

This should be a base for an uart driver for this device in the future.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-60-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby be4866671f mxser: extract and dedup CTS handling
CTS is handled on two locations in mxser. Extract the code into
separation function mxser_handle_cts. And call it from the two
locations.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-59-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 8aff64e00f mxser: don't start TX from tty_operations::put_char
TX is not supposed to be started from tty_operations::put_char. Line
disciplines ought to call tty_operations::put_char several times and
then do a single tty_operations::flush_chars to start TX.

Fix this in mxser by removing TX startup from mxser_put_char.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-58-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 007bbdc875 mxser: cleanup mxser_dtr_rts
mxser_dtr_rts now does all inb, outb, & or | in a single statement.  The
code is hard to follow, so make it more readable by doing one-line =
one-statement.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-57-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 5990843328 mxser: cleanup mxser_rs_break
mxser_rs_break now does all inb, outb, & or | in a single statement. The
code is hard to follow, so make it more readable by doing one-line =
one-statement.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-56-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 987a4cfee5 mxser: remove pointless ioaddr checks
struct mxser_port::ioaddr can never be NULL once set in ->probe. Hence
the checks for it are pointless. Remove them.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-55-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby ad1c92ff6e mxser: alloc only needed # of ports
Many boards have only 2 ports. But we always allocate 8 ports (struct
mxser_port) in each struct mxser_board.

Switch this to an empty/variable sized array ([]) and allocate the
needed number of ports using struct_size helper in ->probe.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-54-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby f8b6b327aa mxser: alloc struct mxser_board dynamically
There is no need to preallocate an array of four struct mxser_board's.
In most cases a single board or two will be present in a machine. So
allocate struct mxser_board as needed in ->probe.

This makes mxser_boards a bit array. There we store which indexes are
free (unallocated).

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-53-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 13d4aba8a9 mxser: make mxser_board::idx really an index
mxser_board::idx is named as index, but actually contain a base. So
assign index there. And for base, introduce a local variable.

This is needed for the next patch (use index as a bit index).

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-52-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby 42ad25fc46 mxser: rework and simplify mxser_open
In mxser_open, tty->port is already set thanks to
tty_port_register_device in ->probe. So we can simply use container_of
to deduce the struct mxser_port's pointer. Thus avoiding divisions and
complex computations.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-51-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby c3db20c3b7 mxser: cleanup mxser_process_txrx_fifo
Rename process_txrx_fifo to mxser_process_txrx_fifo and:
* remove useless parentheses
* return from the 'if's true branch and process the rest in normal code
  flow (shift the code one level left)

All this to make the code more readable.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-50-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:02 +02:00
Jiri Slaby c24c31ff4a mxser: remove mxser_cardinfo
Now that mxser_cards array (of struct mxser_cardinfo) contains only port
count and a quirk, we can encode these two directly into
pci_device_id::driver_data. And we can remove this struct completely.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-49-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby 1e37f7333c mxser: remove info message from probe
There is a dev_info in ->probe which prints device's name, bus and slot
numbers. All these can be fetched from the lspci output. So remove this
useless print.

This eliminates the whole mxser_cardinfo::name field.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-48-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby 7f0e79dc09 mxser: move request irq to probe and switch to managed
Move request_irq from mxser_initbrd to mxser_probe so that we can switch
it to managed request. It simplifies the cleanup code.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-47-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby dcb04e21bb mxser: pci, switch to managed resources
Switch to managed resources for PCI using pcim_enable_device.
Regions and device disabling is now taken care of by the core and we
need not unwind. Neither in ->probe, nor in ->remove. That simplifies
the code.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-46-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby d450f0852f mxser: inline mxser_board_remove into mxser_remove
The only user of mxser_board_remove is mxser_remove. Move there those
few lines.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-45-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby 57faa7d614 mxser: move board init into mxser_initbrd
What's done in ->probe for board is actually its initialization. So move
it to mxser_initbrd where it belongs.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-44-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby b441eb0f69 mxser: clean up the rest of MUST helpers
Clean up the rest of MUST helpers. They all can use the newly added
mxser_must_set_EFR. And passing a bool instead of having two functions
(_enable+_disable) simplifies the code a lot too.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-43-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby b286484b3b mxser: introduce mxser_must_select_bank and use it
Again, selecting a bank in the EFR register is duplicated many times.
Extract it to a separate function (mxser_must_select_bank) and use it on
all the places.

This cleans up most of the helpers. And mxser_get_must_hardware_id now
returns the HW ID directly, not via a by-reference parameter.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-42-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby edb7d27cd1 mxser: dedup mxser_must_set_enhance_mode
There are multiple copies of setting the EFR register. Separate it to a
new universal function called __mxser_must_set_EFR. And use it in the
code by introducing mxser_must_set_enhance_mode instead of
mxser_disable_must_enchance_mode and mxser_enable_must_enchance_mode.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-41-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby 238d117d17 mxser: simplify mxser_ioctl_op_mode
* ModeMask local array is just inverted OP_MODE_MASK shifted by shiftbit.
  Drop this array and use the value directly.
* return from the if's true branch and drop 'else' branch by moving the
  code completely outside the if.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-40-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby 9fae5f857e mxser: extract mxser_ioctl_op_mode
This ioctl code sets RS232, RS422 or RS485 mode. Move the code to a
separate function (mxser_ioctl_op_mode) with a note that these
mxser-special ioctls should be likely replaced eventually by TIOCGRS485
and TIOCSRS485.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-39-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby 2c21832b55 mxser: cleanup mxser_change_speed
* use UART macros instead of magic constants
* let the default case reuse already existing code (CS5 case)

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-38-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby d811b26ba3 mxser: drop mxser_port::custom_divisor
It's an once-set constant, so define a macro for the constant
(MXSER_CUSTOM_DIVISOR) and use it in the code instead.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-37-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:01 +02:00
Jiri Slaby a6970c39c3 mxser: drop mxser_port::baud_base
It's an once-set constant, so define a macro for the constant
(MXSER_BAUD_BASE) and use it in the code instead.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-36-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:00 +02:00
Jiri Slaby 01c3de9a10 mxser: remove unused mxser_port::stop_rx
It's been a long time since mxser_port::stop_rx was abandoned. Remove it.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-35-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:00 +02:00
Jiri Slaby cc67399029 mxser: drop unused mxser_port::normal_termios
After the previous patches, mxser_port::normal_termios is unused, so
time to wave bye-bye.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-34-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-18 13:10:00 +02:00