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* tty: serial: sh-sci: Add support for tx end interrupt handlingBiju Das2023-04-201-0/+3
| | | | | | | | | | | | | | As per the RZ/G2L users hardware manual (Rev.1.20 Sep, 2022), section 23.3.7 Serial Data Transmission (Asynchronous Mode), it is mentioned that, set the SCR.TIE bit to 0 and SCR.TEIE bit to 1, after the last data to be transmitted are written to the TDR. This will generate tx end interrupt and in the handler set SCR.TE and SCR.TEIE to 0. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://lore.kernel.org/r/20230412145053.114847-5-biju.das.jz@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add support for RZ/G2L SoCBiju Das2021-06-041-0/+1
| | | | | | | | | | Add serial support for RZ/G2L SoC with earlycon and extended mode register support. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://lore.kernel.org/r/20210603221758.10305-11-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Revert "serial: sh-sci: Add support for RZ/G2L SoC"Greg Kroah-Hartman2021-05-211-1/+0
| | | | | | | | | | This reverts commit 064b6e47b2b2d4a20566ba6f8dc90e46b599b35f as it wasn't quite ready yet :( Cc: Biju Das <biju.das.jz@bp.renesas.com> CC: Geert Uytterhoeven <geert+renesas@glider.be> Reported-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add support for RZ/G2L SoCBiju Das2021-05-201-0/+1
| | | | | | | | | | Add serial support for RZ/G2L SoC with earlycon and extended mode register support. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://lore.kernel.org/r/20210514192218.13022-11-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Drop unused includeLinus Walleij2020-04-161-1/+0
| | | | | | | | | | | | The sh-sci.h file includes the legacy <linux/gpio.h> header but the driver is actually migrated to use the mctrl_gpio library so this is not needed. Cc: George G. Davis <george_davis@mentor.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20200415180250.221762-1-linus.walleij@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Support for HSCIF RX sampling point adjustmentUlrich Hecht2018-04-231-0/+4
| | | | | | | | | | | | | HSCIF has facilities that allow moving the RX sampling point by between -8 and 7 sampling cycles (one sampling cycles equals 1/15 of a bit by default) to improve the error margin in case of slightly mismatched bit rates between sender and receiver. This patch tries to determine if shifting the sampling point can improve the error margin and will enable it if so. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge tag 'tty-4.15-rc1' of ↵Linus Torvalds2017-11-141-0/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial updates from Greg KH: "Here is the big tty/serial driver pull request for 4.15-rc1. Lots of serial driver updates in here, some small vt cleanups, and a raft of SPDX and license boilerplate cleanups, messing up the diffstat a bit. Nothing major, with no realy functional changes except better hardware support for some platforms. All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (110 commits) tty: ehv_bytechan: fix spelling mistake tty: serial: meson: allow baud-rates lower than 9600 serial: 8250_fintek: Fix crash with baud rate B0 serial: 8250_fintek: Disable delays for ports != 0 serial: 8250_fintek: Return -EINVAL on invalid configuration tty: Remove redundant license text tty: serdev: Remove redundant license text tty: hvc: Remove redundant license text tty: serial: Remove redundant license text tty: add SPDX identifiers to all remaining files in drivers/tty/ tty: serial: jsm: remove redundant pointer ts tty: serial: jsm: add space before the open parenthesis '(' tty: serial: jsm: fix coding style tty: serial: jsm: delete space between function name and '(' tty: serial: jsm: add blank line after declarations tty: serial: jsm: change the type of local variable tty: serial: imx: remove dead code imx_dma_rxint tty: serial: imx: disable ageing timer interrupt if dma in use serial: 8250: fix potential deadlock in rs485-mode serial: m32r_sio: Drop redundant .data assignment ...
| * serial: sh-sci: Support for variable HSCIF hardware RX timeoutUlrich Hecht2017-10-031-0/+3
| | | | | | | | | | | | | | | | | | | | | | HSCIF has facilities that allow changing the timeout after which an RX interrupt is triggered even if the FIFO is not filled. This patch allows changing the default (15 bits of silence) using the existing sysfs attribute "rx_fifo_timeout". Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman2017-11-021-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: consider DR (data ready) bit adequatelyUlrich Hecht2017-02-031-1/+1
| | | | | | | | | | | To allow operation with a higher RX FIFO interrupt threshold in PIO mode, it is necessary to consider the DR bit ("FIFO not full, but no data received for 1.5 frames") as an indicator that data can be read. Otherwise the driver will let data rot in the FIFO until the threshold is reached. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: add FIFO trigger bitsUlrich Hecht2017-02-031-0/+6
| | | | | | | | | Defines the bits controlling FIFO thresholds, adds the additional HSCIF registers to the register map. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Extend sci_port_params with more port parametersLaurent Pinchart2017-01-191-2/+2
| | | | | | | | | | The fifo size, overrun register and mask, sampling rate mask and error mask all depend on the port type only and don't need to be computed at runtime. Add them to the sci_port_parameters structure. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Clear (H)SCIF timeout and overrun during resetGeert Uytterhoeven2016-06-251-0/+1
| | | | | | | | | Add the missing timeout bit definition for (H)SCIF. Clear the timeout and overrun flag bits during UART reset, cfr. the initialization flowchart in the datasheet. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add more Serial Port Control/Data Register documentationGeert Uytterhoeven2016-06-251-4/+10
| | | | | | | | | | | | Improve documentation for the SCIFA/SCIFB Serial Port Control and Data Registers: - State clearly that the RTS and CTS lines are active-low, - Document the bits related to the serial port's SCK, RXD, and TXD pins. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add more Serial Port Register documentationGeert Uytterhoeven2016-06-251-4/+6
| | | | | | | | | | Improve documentation for the (H)SCIF Serial Port Register: - Make it clear the RTS and CTS lines are active-low, - Document the bits related to the serial port's clock pin. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add more Serial Mode Register documentationGeert Uytterhoeven2016-02-071-0/+15
| | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add BRG register definitionsGeert Uytterhoeven2015-12-171-0/+10
| | | | | | | | | Add register definitions for the Baud Rate Generator for External Clock (BRG), as found in some SCIF and in HSCIF, including a new regtype for the "SH-4(A)"-derived SCIF variant with BRG. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Correct SCIF_ERROR_CLEAR for plain SCIFGeert Uytterhoeven2015-10-041-2/+2
| | | | | | | | | | | | | | SCIF_ERROR_CLEAR includes SCIFA_ORER, which exists only on SCIFA/SCIFB and SCIF on sh7705/sh7720/sh7721. To fix this: 1. Remove SCIFA_ORER from the definition of SCIF_ERROR_CLEAR, 2. During initialization, store the error clear mask to use, incorporating the overrun bit only if it applies to the SCxSR register. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Prevent compiler warnings on 64-bitGeert Uytterhoeven2015-10-041-8/+8
| | | | | | | | | | | | | | | | | | | | Expressions involving "BIT(...)" create values of type "long", which is 64-bit on 64-bit. Hence "~BIT(...)" no longer fits in 32-bit, which will cause future compiler warnings when assigning to 32-bit variables: drivers/tty/serial/sh-sci.c: In function 'sci_init_single': drivers/tty/serial/sh-sci.h:58:25: warning: large integer implicitly truncated to unsigned type [-Woverflow] #define SCI_ERROR_CLEAR ~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER) ^ drivers/tty/serial/sh-sci.c:2325:27: note: in expansion of macro 'SCI_ERROR_CLEAR' sci_port->error_clear = SCI_ERROR_CLEAR; As these values are (at most) 32-bit register values anyway, cast them to "u32" at the definition level to prevent such compiler warnings. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Replace buggy big #ifdef by runtime logicGeert Uytterhoeven2015-10-041-25/+8
| | | | | | | | | | | | | | | | | | | | | | | The #ifdef logic to clear SCxSR bits using RMW on SCIFA/SCIFB and SCIF variants with some SCIFA features (sh7705/SH7720/sh7721) has several drawbacks: - It wasn't updated for newer R-Mobile variants (APE6), - It doesn't correctly handle SoCs with both SCIF and SCIFA/B (e.g. R-Car Gen2, but also legacy sh7723/sh7724), - It doesn't play well with ARM multi-platform kernels: on R-Car Gen2, SCIF/SCIFA/SCIFB/HSCIF were handled differently, depending on whether r8a7740 or sh73a0 support was enabled or not, Replace the #ifdef logic by runtime logic to fix this. SCIFA/SCIFB and SCIF on sh7705/sh7720/sh7721 use RMW to clear error bits, other variants use plain stores, as before. Note that this changes behavior for SCIFA on sh7723/sh7724 (these SoCs have both SCIF and SCIFA), which didn't use RMW before. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Replace hardcoded overrun bit valuesGeert Uytterhoeven2015-05-101-0/+3
| | | | | | | | | Add the missing overrun bit definition for (H)SCIF. Replace overrun_bit by overrun_mask, so we can use the existing defines instead of hardcoded values. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Replace hardcoded values in SCxSR_*_CLEAR macrosGeert Uytterhoeven2015-05-101-10/+34
| | | | | | | | | | | | | | | | | | | | | | Add the missing overrun error bit in SCxSR on SCIFA/SCIFB and SCIF on SH7705/SH7720/SH7721. Document what the corresponding bit(s) on plain SCIF are used for. Sort the components of SCIF_DEFAULT_ERROR_MASK by reverse definition order. Replace the hardcoded values in the SCxSR_*_CLEAR macros by proper defines. Use bit masks (negations of sets of bits) to make it more obvious which bits are being cleared. Assembler output (on sh) was compared before and after this commit: - For the first branch of the big "#if defined(...) || ..." construct, the code has changed slightly, as 32-bit bitmasks can be loaded in a single instruction, unlike the old large 16-bit constants (the SCxSR register is 16 bit, so we don't care about the top 16 bits), - For the second branch, the generated code is identical. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Standardize on using the BIT() macro to define register bitsGeert Uytterhoeven2015-05-101-36/+37
| | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Document remaining FIFO Control Register bitsGeert Uytterhoeven2015-05-101-3/+3
| | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add SCIFA/B SCPCR register definitionsGeert Uytterhoeven2015-05-101-0/+10
| | | | | | | | | | Add the register definitions for the Serial Port Control and Data Registers on SCIFA/SCIFB, which are needed for RTS/CTS pin control. Extracted from patches by Magnus Damm <damm+renesas@opensource.se>. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Add (H)SCIF RTS/CTS pin data register bit definitionsGeert Uytterhoeven2015-05-101-0/+2
| | | | | | | | | | Add the missing register bit definitions to set the RTS pin and read the CTS pin on (H)SCIF. Extracted from patches by Magnus Damm <damm+renesas@opensource.se>. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Move private definitions to private header fileGeert Uytterhoeven2015-05-101-7/+76
| | | | | | | | | | | | | Move private register definitions and enums from the public <linux/serial_sci.h> header file to the driver private "sh-sci.h" header file. The common Serial Control Register definitions are left in the public header file, as they're needed to fill in plat_sci_port.scscr on legacy systems not using DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/tty/serial/sh-sci.h: remove dead reference on ARCH_SH7372Valentin Rothberg2015-05-061-1/+0
| | | | | | | | | | The Kconfig option ARCH_SH7372 has been removed by commit 59b89af1d555 ("ARM: shmobile: sh7372: Remove Legacy C SoC code"). This patch removes the last reference on this Kconfig option. Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: Move overrun_bit and error_mask fields out of pdataLaurent Pinchart2013-12-241-1/+1
| | | | | | | | | | None of the fields is ever set by board code, and both of them are set in the driver at probe time. Move them out of struct plat_sci_port to struct sci_port. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
* serial: sh-sci: remove obsolete Kconfig macrosPaul Bolle2013-03-251-2/+0
| | | | | | | | Support for SH7367 and SH7377 got removed in v3.8. Now remove their last Kconfig macros. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serial: sh-sci: use serial_port_in/out vs sci_in/out.Paul Mundt2012-03-301-4/+4
| | | | | | | | Follows the 8250 change for pretty much the same rationale. See commit "serial: use serial_port_in/out vs serial_in/out in 8250". Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* ARM: mach-shmobile: R-Mobile A1 support.Kuninori Morimoto2011-11-111-1/+3
| | | | | | | | | | This adds preliminary support for the R8A7740 (R-Mobile A1) CPU Timer, serial, gic, clock are supported at this point. This patch is based on v0.1 manual Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: FIFO sizing helper consolidation.Paul Mundt2011-06-141-20/+0
| | | | | | | | | | | | | | | | This consolidates all of the TX/RX fill/room nonsense in to a single set of fairly heavyweight definitions. The implementation goes in descending order of complexity, testing the register map for capabilities until we run out of options and do it the legacy SCI way. Masks are derived directly from the per-port FIFO size, meaning that platforms with FIFO sizes not matching the standard port types will still need to manually fix them up. This also fixes up a number of issues such as tx_empty being completely bogus for SCI and IrDA ports, some ports using masks smaller or greater than their FIFO size, and so forth. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Abstract register maps.Paul Mundt2011-06-141-222/+0
| | | | | | | | | | | | | | | This takes a bit of a sledgehammer to the horribly CPU subtype ifdef-ridden header and abstracts all of the different register layouts in to distinct types which in turn can be overriden on a per-port basis, or permitted to default to the map matching the port type at probe time. In the process this ultimately fixes up inumerable bugs with mismatches on various CPU types (particularly the legacy ones that were obviously broken years ago and no one noticed) and provides a more tightly coupled and consolidated platform for extending and implementing generic features. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: More unused define purging.Paul Mundt2011-06-081-15/+6
| | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Consolidate RXD pin handling.Paul Mundt2011-06-081-29/+0
| | | | | | | | | | | | | | | Non-SCI parts do not have the special port reg necessary for cases where the RX and SCI pins are muxed and need to be manually polled, so these like always fall back on the normal FIFO processing paths. SH7760 is in a class in and of itself with regards to mapping its SIM card interface via the SCI port class despite not having any of the RXD lines wired up and so implicitly behaving more like a SCIF in this regard. Out of the other CPUs, some support the port check via the same block while others do it through an external SuperI/O, so it's not even possible to perform the check relative to the ioremapped cookie offset, so the separate read semantics are preserved here, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Generalize overrun handling.Paul Mundt2011-06-081-50/+2
| | | | | | | | | This consolidates all of the broken out overrun handling and ensures that we have sensible defaults per-port type, in addition to making sure that overruns are flagged appropriately in the error mask for parts that haven't explicitly disabled support for it. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Kill off some more unused definitions.Paul Mundt2011-06-081-4/+0
| | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Tidy up ioread/write wrappers, kill off unused SCI helper.Paul Mundt2011-06-081-26/+9
| | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Kill off bitrotted H8/300 support.Paul Mundt2011-06-061-92/+11
| | | | | | | | | h8300 has never been updated upstream to support the conversion to the driver model (which happened mid-2.5), and it doesn't seem likely that it ever will. Kill off the remaining bitrotted support to reduce the maintenance burden going forward. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: sh-sci: sh7377 and sh73a0 build fixesMagnus Damm2011-05-231-8/+8
| | | | | | | | | | | | | | | | Fix sh7377 and sh73a0 build failure: drivers/tty/serial/sh-sci.c: In function 'scif_txfill': drivers/tty/serial/sh-sci.c:338: error: implicit declaration of function 'sci_SCTFDR_in' drivers/tty/serial/sh-sci.c: In function 'scif_rxfill': drivers/tty/serial/sh-sci.c:351: error: implicit declaration of function 'sci_SCRFDR_in' make[3]: *** [drivers/tty/serial/sh-sci.o] Error 1 make[2]: *** [drivers/tty/serial] Error 2 make[1]: *** [drivers/tty] Error 2 make: *** [drivers] Error 2 Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* Merge branch 'master' of ↵Paul Mundt2011-01-261-39/+0
| | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into common/serial-rework
* Merge branch 'tty-linus' of ↵Linus Torvalds2011-01-211-153/+0
| | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 * 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: tty: update MAINTAINERS file due to driver movement tty: move drivers/serial/ to drivers/tty/serial/ tty: move hvc drivers to drivers/tty/hvc/
* tty: move drivers/serial/ to drivers/tty/serial/Greg Kroah-Hartman2011-01-131-0/+660
The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl> Cc: Michael H. Warfield <mhw@wittsend.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>