License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2008-12-17 02:15:33 +08:00
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/* Primary function overlay window definitions
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* and service functions used by LPDDR chips
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*/
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#ifndef __LINUX_MTD_PFOW_H
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#define __LINUX_MTD_PFOW_H
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#include <linux/mtd/qinfo.h>
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/* PFOW registers addressing */
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/* Address of symbol "P" */
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#define PFOW_QUERY_STRING_P 0x0000
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/* Address of symbol "F" */
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#define PFOW_QUERY_STRING_F 0x0002
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/* Address of symbol "O" */
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#define PFOW_QUERY_STRING_O 0x0004
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/* Address of symbol "W" */
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#define PFOW_QUERY_STRING_W 0x0006
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/* Identification info for LPDDR chip */
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#define PFOW_MANUFACTURER_ID 0x0020
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#define PFOW_DEVICE_ID 0x0022
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/* Address in PFOW where prog buffer can can be found */
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#define PFOW_PROGRAM_BUFFER_OFFSET 0x0040
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/* Size of program buffer in words */
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#define PFOW_PROGRAM_BUFFER_SIZE 0x0042
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/* Address command code register */
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#define PFOW_COMMAND_CODE 0x0080
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/* command data register */
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#define PFOW_COMMAND_DATA 0x0084
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/* command address register lower address bits */
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#define PFOW_COMMAND_ADDRESS_L 0x0088
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/* command address register upper address bits */
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#define PFOW_COMMAND_ADDRESS_H 0x008a
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/* number of bytes to be proggrammed lower address bits */
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#define PFOW_DATA_COUNT_L 0x0090
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/* number of bytes to be proggrammed higher address bits */
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#define PFOW_DATA_COUNT_H 0x0092
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/* command execution register, the only possible value is 0x01 */
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#define PFOW_COMMAND_EXECUTE 0x00c0
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/* 0x01 should be written at this address to clear buffer */
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#define PFOW_CLEAR_PROGRAM_BUFFER 0x00c4
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/* device program/erase suspend register */
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#define PFOW_PROGRAM_ERASE_SUSPEND 0x00c8
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/* device status register */
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#define PFOW_DSR 0x00cc
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/* LPDDR memory device command codes */
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/* They are possible values of PFOW command code register */
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#define LPDDR_WORD_PROGRAM 0x0041
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#define LPDDR_BUFF_PROGRAM 0x00E9
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#define LPDDR_BLOCK_ERASE 0x0020
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#define LPDDR_LOCK_BLOCK 0x0061
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#define LPDDR_UNLOCK_BLOCK 0x0062
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#define LPDDR_READ_BLOCK_LOCK_STATUS 0x0065
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#define LPDDR_INFO_QUERY 0x0098
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#define LPDDR_READ_OTP 0x0097
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#define LPDDR_PROG_OTP 0x00C0
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#define LPDDR_RESUME 0x00D0
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/* Defines possible value of PFOW command execution register */
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#define LPDDR_START_EXECUTION 0x0001
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/* Defines possible value of PFOW program/erase suspend register */
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#define LPDDR_SUSPEND 0x0001
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/* Possible values of PFOW device status register */
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/* access R - read; RC read & clearable */
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#define DSR_DPS (1<<1) /* RC; device protect status
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* 0 - not protected 1 - locked */
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#define DSR_PSS (1<<2) /* R; program suspend status;
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* 0-prog in progress/completed,
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* 1- prog suspended */
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#define DSR_VPPS (1<<3) /* RC; 0-Vpp OK, * 1-Vpp low */
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#define DSR_PROGRAM_STATUS (1<<4) /* RC; 0-successful, 1-error */
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#define DSR_ERASE_STATUS (1<<5) /* RC; erase or blank check status;
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* 0-success erase/blank check,
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* 1 blank check error */
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#define DSR_ESS (1<<6) /* R; erase suspend status;
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* 0-erase in progress/complete,
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* 1 erase suspended */
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#define DSR_READY_STATUS (1<<7) /* R; Device status
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* 0-busy,
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* 1-ready */
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#define DSR_RPS (0x3<<8) /* RC; region program status
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* 00 - Success,
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* 01-re-program attempt in region with
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* object mode data,
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* 10-object mode program w attempt in
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* region with control mode data
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* 11-attempt to program invalid half
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* with 0x41 command */
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#define DSR_AOS (1<<12) /* RC; 1- AO related failure */
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#define DSR_AVAILABLE (1<<15) /* R; Device availbility
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* 1 - Device available
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* 0 - not available */
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/* The superset of all possible error bits in DSR */
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#define DSR_ERR 0x133A
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static inline void send_pfow_command(struct map_info *map,
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unsigned long cmd_code, unsigned long adr,
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unsigned long len, map_word *datum)
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{
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int bits_per_chip = map_bankwidth(map) * 8;
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map_write(map, CMD(cmd_code), map->pfow_base + PFOW_COMMAND_CODE);
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map_write(map, CMD(adr & ((1<<bits_per_chip) - 1)),
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map->pfow_base + PFOW_COMMAND_ADDRESS_L);
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map_write(map, CMD(adr>>bits_per_chip),
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map->pfow_base + PFOW_COMMAND_ADDRESS_H);
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if (len) {
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map_write(map, CMD(len & ((1<<bits_per_chip) - 1)),
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map->pfow_base + PFOW_DATA_COUNT_L);
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map_write(map, CMD(len>>bits_per_chip),
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map->pfow_base + PFOW_DATA_COUNT_H);
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}
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if (datum)
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map_write(map, *datum, map->pfow_base + PFOW_COMMAND_DATA);
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/* Command execution start */
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map_write(map, CMD(LPDDR_START_EXECUTION),
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map->pfow_base + PFOW_COMMAND_EXECUTE);
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}
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static inline void print_drs_error(unsigned dsr)
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{
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int prog_status = (dsr & DSR_RPS) >> 8;
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if (!(dsr & DSR_AVAILABLE))
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printk(KERN_NOTICE"DSR.15: (0) Device not Available\n");
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if (prog_status & 0x03)
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printk(KERN_NOTICE"DSR.9,8: (11) Attempt to program invalid "
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"half with 41h command\n");
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else if (prog_status & 0x02)
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printk(KERN_NOTICE"DSR.9,8: (10) Object Mode Program attempt "
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"in region with Control Mode data\n");
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else if (prog_status & 0x01)
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printk(KERN_NOTICE"DSR.9,8: (01) Program attempt in region "
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"with Object Mode data\n");
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if (!(dsr & DSR_READY_STATUS))
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printk(KERN_NOTICE"DSR.7: (0) Device is Busy\n");
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if (dsr & DSR_ESS)
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printk(KERN_NOTICE"DSR.6: (1) Erase Suspended\n");
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if (dsr & DSR_ERASE_STATUS)
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printk(KERN_NOTICE"DSR.5: (1) Erase/Blank check error\n");
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if (dsr & DSR_PROGRAM_STATUS)
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printk(KERN_NOTICE"DSR.4: (1) Program Error\n");
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if (dsr & DSR_VPPS)
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printk(KERN_NOTICE"DSR.3: (1) Vpp low detect, operation "
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"aborted\n");
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if (dsr & DSR_PSS)
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printk(KERN_NOTICE"DSR.2: (1) Program suspended\n");
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if (dsr & DSR_DPS)
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printk(KERN_NOTICE"DSR.1: (1) Aborted Erase/Program attempt "
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"on locked block\n");
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}
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#endif /* __LINUX_MTD_PFOW_H */
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