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b24413180f
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>
171 lines
7.2 KiB
C
171 lines
7.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/bitops.h>
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#include <linux/serial_core.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#define SCI_MAJOR 204
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#define SCI_MINOR_START 8
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/*
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* SCI register subset common for all port types.
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* Not all registers will exist on all parts.
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*/
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enum {
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SCSMR, /* Serial Mode Register */
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SCBRR, /* Bit Rate Register */
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SCSCR, /* Serial Control Register */
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SCxSR, /* Serial Status Register */
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SCFCR, /* FIFO Control Register */
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SCFDR, /* FIFO Data Count Register */
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SCxTDR, /* Transmit (FIFO) Data Register */
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SCxRDR, /* Receive (FIFO) Data Register */
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SCLSR, /* Line Status Register */
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SCTFDR, /* Transmit FIFO Data Count Register */
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SCRFDR, /* Receive FIFO Data Count Register */
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SCSPTR, /* Serial Port Register */
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HSSRR, /* Sampling Rate Register */
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SCPCR, /* Serial Port Control Register */
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SCPDR, /* Serial Port Data Register */
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SCDL, /* BRG Frequency Division Register */
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SCCKS, /* BRG Clock Select Register */
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HSRTRGR, /* Rx FIFO Data Count Trigger Register */
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HSTTRGR, /* Tx FIFO Data Count Trigger Register */
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SCIx_NR_REGS,
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};
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/* SCSMR (Serial Mode Register) */
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#define SCSMR_C_A BIT(7) /* Communication Mode */
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#define SCSMR_CSYNC BIT(7) /* - Clocked synchronous mode */
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#define SCSMR_ASYNC 0 /* - Asynchronous mode */
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#define SCSMR_CHR BIT(6) /* 7-bit Character Length */
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#define SCSMR_PE BIT(5) /* Parity Enable */
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#define SCSMR_ODD BIT(4) /* Odd Parity */
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#define SCSMR_STOP BIT(3) /* Stop Bit Length */
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#define SCSMR_CKS 0x0003 /* Clock Select */
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/* Serial Mode Register, SCIFA/SCIFB only bits */
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#define SCSMR_CKEDG BIT(12) /* Transmit/Receive Clock Edge Select */
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#define SCSMR_SRC_MASK 0x0700 /* Sampling Control */
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#define SCSMR_SRC_16 0x0000 /* Sampling rate 1/16 */
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#define SCSMR_SRC_5 0x0100 /* Sampling rate 1/5 */
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#define SCSMR_SRC_7 0x0200 /* Sampling rate 1/7 */
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#define SCSMR_SRC_11 0x0300 /* Sampling rate 1/11 */
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#define SCSMR_SRC_13 0x0400 /* Sampling rate 1/13 */
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#define SCSMR_SRC_17 0x0500 /* Sampling rate 1/17 */
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#define SCSMR_SRC_19 0x0600 /* Sampling rate 1/19 */
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#define SCSMR_SRC_27 0x0700 /* Sampling rate 1/27 */
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/* Serial Control Register, SCIFA/SCIFB only bits */
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#define SCSCR_TDRQE BIT(15) /* Tx Data Transfer Request Enable */
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#define SCSCR_RDRQE BIT(14) /* Rx Data Transfer Request Enable */
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/* SCxSR (Serial Status Register) on SCI */
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#define SCI_TDRE BIT(7) /* Transmit Data Register Empty */
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#define SCI_RDRF BIT(6) /* Receive Data Register Full */
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#define SCI_ORER BIT(5) /* Overrun Error */
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#define SCI_FER BIT(4) /* Framing Error */
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#define SCI_PER BIT(3) /* Parity Error */
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#define SCI_TEND BIT(2) /* Transmit End */
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#define SCI_RESERVED 0x03 /* All reserved bits */
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#define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
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#define SCI_RDxF_CLEAR (u32)(~(SCI_RESERVED | SCI_RDRF))
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#define SCI_ERROR_CLEAR (u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
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#define SCI_TDxE_CLEAR (u32)(~(SCI_RESERVED | SCI_TEND | SCI_TDRE))
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#define SCI_BREAK_CLEAR (u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
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/* SCxSR (Serial Status Register) on SCIF, SCIFA, SCIFB, HSCIF */
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#define SCIF_ER BIT(7) /* Receive Error */
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#define SCIF_TEND BIT(6) /* Transmission End */
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#define SCIF_TDFE BIT(5) /* Transmit FIFO Data Empty */
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#define SCIF_BRK BIT(4) /* Break Detect */
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#define SCIF_FER BIT(3) /* Framing Error */
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#define SCIF_PER BIT(2) /* Parity Error */
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#define SCIF_RDF BIT(1) /* Receive FIFO Data Full */
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#define SCIF_DR BIT(0) /* Receive Data Ready */
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/* SCIF only (optional) */
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#define SCIF_PERC 0xf000 /* Number of Parity Errors */
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#define SCIF_FERC 0x0f00 /* Number of Framing Errors */
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/*SCIFA/SCIFB and SCIF on SH7705/SH7720/SH7721 only */
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#define SCIFA_ORER BIT(9) /* Overrun Error */
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#define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_BRK | SCIF_ER)
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#define SCIF_RDxF_CLEAR (u32)(~(SCIF_DR | SCIF_RDF))
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#define SCIF_ERROR_CLEAR (u32)(~(SCIF_PER | SCIF_FER | SCIF_ER))
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#define SCIF_TDxE_CLEAR (u32)(~(SCIF_TDFE))
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#define SCIF_BREAK_CLEAR (u32)(~(SCIF_PER | SCIF_FER | SCIF_BRK))
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/* SCFCR (FIFO Control Register) */
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#define SCFCR_RTRG1 BIT(7) /* Receive FIFO Data Count Trigger */
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#define SCFCR_RTRG0 BIT(6)
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#define SCFCR_TTRG1 BIT(5) /* Transmit FIFO Data Count Trigger */
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#define SCFCR_TTRG0 BIT(4)
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#define SCFCR_MCE BIT(3) /* Modem Control Enable */
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#define SCFCR_TFRST BIT(2) /* Transmit FIFO Data Register Reset */
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#define SCFCR_RFRST BIT(1) /* Receive FIFO Data Register Reset */
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#define SCFCR_LOOP BIT(0) /* Loopback Test */
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/* SCLSR (Line Status Register) on (H)SCIF */
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#define SCLSR_TO BIT(2) /* Timeout */
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#define SCLSR_ORER BIT(0) /* Overrun Error */
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/* SCSPTR (Serial Port Register), optional */
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#define SCSPTR_RTSIO BIT(7) /* Serial Port RTS# Pin Input/Output */
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#define SCSPTR_RTSDT BIT(6) /* Serial Port RTS# Pin Data */
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#define SCSPTR_CTSIO BIT(5) /* Serial Port CTS# Pin Input/Output */
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#define SCSPTR_CTSDT BIT(4) /* Serial Port CTS# Pin Data */
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#define SCSPTR_SCKIO BIT(3) /* Serial Port Clock Pin Input/Output */
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#define SCSPTR_SCKDT BIT(2) /* Serial Port Clock Pin Data */
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#define SCSPTR_SPB2IO BIT(1) /* Serial Port Break Input/Output */
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#define SCSPTR_SPB2DT BIT(0) /* Serial Port Break Data */
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/* HSSRR HSCIF */
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#define HSCIF_SRE BIT(15) /* Sampling Rate Register Enable */
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/* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */
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#define SCPCR_RTSC BIT(4) /* Serial Port RTS# Pin / Output Pin */
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#define SCPCR_CTSC BIT(3) /* Serial Port CTS# Pin / Input Pin */
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#define SCPCR_SCKC BIT(2) /* Serial Port SCK Pin / Output Pin */
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#define SCPCR_RXDC BIT(1) /* Serial Port RXD Pin / Input Pin */
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#define SCPCR_TXDC BIT(0) /* Serial Port TXD Pin / Output Pin */
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/* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */
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#define SCPDR_RTSD BIT(4) /* Serial Port RTS# Output Pin Data */
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#define SCPDR_CTSD BIT(3) /* Serial Port CTS# Input Pin Data */
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#define SCPDR_SCKD BIT(2) /* Serial Port SCK Output Pin Data */
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#define SCPDR_RXDD BIT(1) /* Serial Port RXD Input Pin Data */
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#define SCPDR_TXDD BIT(0) /* Serial Port TXD Output Pin Data */
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/*
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* BRG Clock Select Register (Some SCIF and HSCIF)
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* The Baud Rate Generator for external clock can provide a clock source for
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* the sampling clock. It outputs either its frequency divided clock, or the
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* (undivided) (H)SCK external clock.
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*/
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#define SCCKS_CKS BIT(15) /* Select (H)SCK (1) or divided SC_CLK (0) */
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#define SCCKS_XIN BIT(14) /* SC_CLK uses bus clock (1) or SCIF_CLK (0) */
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#define SCxSR_TEND(port) (((port)->type == PORT_SCI) ? SCI_TEND : SCIF_TEND)
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#define SCxSR_RDxF(port) (((port)->type == PORT_SCI) ? SCI_RDRF : SCIF_DR | SCIF_RDF)
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#define SCxSR_TDxE(port) (((port)->type == PORT_SCI) ? SCI_TDRE : SCIF_TDFE)
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#define SCxSR_FER(port) (((port)->type == PORT_SCI) ? SCI_FER : SCIF_FER)
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#define SCxSR_PER(port) (((port)->type == PORT_SCI) ? SCI_PER : SCIF_PER)
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#define SCxSR_BRK(port) (((port)->type == PORT_SCI) ? 0x00 : SCIF_BRK)
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#define SCxSR_ERRORS(port) (to_sci_port(port)->params->error_mask)
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#define SCxSR_RDxF_CLEAR(port) \
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(((port)->type == PORT_SCI) ? SCI_RDxF_CLEAR : SCIF_RDxF_CLEAR)
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#define SCxSR_ERROR_CLEAR(port) \
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(to_sci_port(port)->params->error_clear)
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#define SCxSR_TDxE_CLEAR(port) \
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(((port)->type == PORT_SCI) ? SCI_TDxE_CLEAR : SCIF_TDxE_CLEAR)
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#define SCxSR_BREAK_CLEAR(port) \
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(((port)->type == PORT_SCI) ? SCI_BREAK_CLEAR : SCIF_BREAK_CLEAR)
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