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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>
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#define CS4245_CHIP_ID 0x01
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#define CS4245_POWER_CTRL 0x02
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#define CS4245_DAC_CTRL_1 0x03
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#define CS4245_ADC_CTRL 0x04
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#define CS4245_MCLK_FREQ 0x05
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#define CS4245_SIGNAL_SEL 0x06
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#define CS4245_PGA_B_CTRL 0x07
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#define CS4245_PGA_A_CTRL 0x08
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#define CS4245_ANALOG_IN 0x09
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#define CS4245_DAC_A_CTRL 0x0a
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#define CS4245_DAC_B_CTRL 0x0b
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#define CS4245_DAC_CTRL_2 0x0c
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#define CS4245_INT_STATUS 0x0d
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#define CS4245_INT_MASK 0x0e
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#define CS4245_INT_MODE_MSB 0x0f
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#define CS4245_INT_MODE_LSB 0x10
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/* Chip ID */
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#define CS4245_CHIP_PART_MASK 0xf0
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#define CS4245_CHIP_REV_MASK 0x0f
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/* Power Control */
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#define CS4245_FREEZE 0x80
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#define CS4245_PDN_MIC 0x08
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#define CS4245_PDN_ADC 0x04
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#define CS4245_PDN_DAC 0x02
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#define CS4245_PDN 0x01
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/* DAC Control */
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#define CS4245_DAC_FM_MASK 0xc0
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#define CS4245_DAC_FM_SINGLE 0x00
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#define CS4245_DAC_FM_DOUBLE 0x40
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#define CS4245_DAC_FM_QUAD 0x80
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#define CS4245_DAC_DIF_MASK 0x30
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#define CS4245_DAC_DIF_LJUST 0x00
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#define CS4245_DAC_DIF_I2S 0x10
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#define CS4245_DAC_DIF_RJUST_16 0x20
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#define CS4245_DAC_DIF_RJUST_24 0x30
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#define CS4245_RESERVED_1 0x08
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#define CS4245_MUTE_DAC 0x04
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#define CS4245_DEEMPH 0x02
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#define CS4245_DAC_MASTER 0x01
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/* ADC Control */
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#define CS4245_ADC_FM_MASK 0xc0
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#define CS4245_ADC_FM_SINGLE 0x00
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#define CS4245_ADC_FM_DOUBLE 0x40
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#define CS4245_ADC_FM_QUAD 0x80
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#define CS4245_ADC_DIF_MASK 0x10
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#define CS4245_ADC_DIF_LJUST 0x00
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#define CS4245_ADC_DIF_I2S 0x10
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#define CS4245_MUTE_ADC 0x04
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#define CS4245_HPF_FREEZE 0x02
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#define CS4245_ADC_MASTER 0x01
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/* MCLK Frequency */
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#define CS4245_MCLK1_MASK 0x70
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#define CS4245_MCLK1_SHIFT 4
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#define CS4245_MCLK2_MASK 0x07
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#define CS4245_MCLK2_SHIFT 0
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#define CS4245_MCLK_1 0
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#define CS4245_MCLK_1_5 1
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#define CS4245_MCLK_2 2
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#define CS4245_MCLK_3 3
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#define CS4245_MCLK_4 4
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/* Signal Selection */
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#define CS4245_A_OUT_SEL_MASK 0x60
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#define CS4245_A_OUT_SEL_HIZ 0x00
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#define CS4245_A_OUT_SEL_DAC 0x20
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#define CS4245_A_OUT_SEL_PGA 0x40
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#define CS4245_LOOP 0x02
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#define CS4245_ASYNCH 0x01
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/* Channel B/A PGA Control */
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#define CS4245_PGA_GAIN_MASK 0x3f
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/* ADC Input Control */
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#define CS4245_PGA_SOFT 0x10
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#define CS4245_PGA_ZERO 0x08
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#define CS4245_SEL_MASK 0x07
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#define CS4245_SEL_MIC 0x00
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#define CS4245_SEL_INPUT_1 0x01
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#define CS4245_SEL_INPUT_2 0x02
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#define CS4245_SEL_INPUT_3 0x03
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#define CS4245_SEL_INPUT_4 0x04
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#define CS4245_SEL_INPUT_5 0x05
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#define CS4245_SEL_INPUT_6 0x06
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/* DAC Channel A/B Volume Control */
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#define CS4245_VOL_MASK 0xff
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/* DAC Control 2 */
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#define CS4245_DAC_SOFT 0x80
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#define CS4245_DAC_ZERO 0x40
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#define CS4245_INVERT_DAC 0x20
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#define CS4245_INT_ACTIVE_HIGH 0x01
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/* Interrupt Status/Mask/Mode */
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#define CS4245_ADC_CLK_ERR 0x08
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#define CS4245_DAC_CLK_ERR 0x04
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#define CS4245_ADC_OVFL 0x02
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#define CS4245_ADC_UNDRFL 0x01
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#define CS4245_SPI_ADDRESS_S (0x9e << 16)
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#define CS4245_SPI_WRITE_S (0 << 16)
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#define CS4245_SPI_ADDRESS 0x9e
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#define CS4245_SPI_WRITE 0
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#define CS4245_SPI_READ 1
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