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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
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>
172 lines
4.6 KiB
C
172 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This is used to for host and peripheral modes of the driver for
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* Inventra (Multidrop) Highspeed Dual-Role Controllers: (M)HDRC.
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*
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* Board initialization should put one of these into dev->platform_data,
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* probably on some platform_device named "musb-hdrc". It encapsulates
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* key configuration differences between boards.
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*/
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#ifndef __LINUX_USB_MUSB_H
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#define __LINUX_USB_MUSB_H
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/* The USB role is defined by the connector used on the board, so long as
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* standards are being followed. (Developer boards sometimes won't.)
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*/
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enum musb_mode {
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MUSB_UNDEFINED = 0,
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MUSB_HOST, /* A or Mini-A connector */
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MUSB_PERIPHERAL, /* B or Mini-B connector */
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MUSB_OTG /* Mini-AB connector */
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};
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struct clk;
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enum musb_fifo_style {
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FIFO_RXTX,
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FIFO_TX,
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FIFO_RX
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} __attribute__ ((packed));
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enum musb_buf_mode {
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BUF_SINGLE,
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BUF_DOUBLE
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} __attribute__ ((packed));
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struct musb_fifo_cfg {
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u8 hw_ep_num;
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enum musb_fifo_style style;
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enum musb_buf_mode mode;
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u16 maxpacket;
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};
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#define MUSB_EP_FIFO(ep, st, m, pkt) \
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{ \
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.hw_ep_num = ep, \
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.style = st, \
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.mode = m, \
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.maxpacket = pkt, \
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}
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#define MUSB_EP_FIFO_SINGLE(ep, st, pkt) \
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MUSB_EP_FIFO(ep, st, BUF_SINGLE, pkt)
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#define MUSB_EP_FIFO_DOUBLE(ep, st, pkt) \
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MUSB_EP_FIFO(ep, st, BUF_DOUBLE, pkt)
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struct musb_hdrc_eps_bits {
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const char name[16];
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u8 bits;
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};
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struct musb_hdrc_config {
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struct musb_fifo_cfg *fifo_cfg; /* board fifo configuration */
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unsigned fifo_cfg_size; /* size of the fifo configuration */
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/* MUSB configuration-specific details */
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unsigned multipoint:1; /* multipoint device */
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unsigned dyn_fifo:1 __deprecated; /* supports dynamic fifo sizing */
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unsigned soft_con:1 __deprecated; /* soft connect required */
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unsigned utm_16:1 __deprecated; /* utm data witdh is 16 bits */
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unsigned big_endian:1; /* true if CPU uses big-endian */
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unsigned mult_bulk_tx:1; /* Tx ep required for multbulk pkts */
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unsigned mult_bulk_rx:1; /* Rx ep required for multbulk pkts */
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unsigned high_iso_tx:1; /* Tx ep required for HB iso */
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unsigned high_iso_rx:1; /* Rx ep required for HD iso */
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unsigned dma:1 __deprecated; /* supports DMA */
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unsigned vendor_req:1 __deprecated; /* vendor registers required */
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/* need to explicitly de-assert the port reset after resume? */
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unsigned host_port_deassert_reset_at_resume:1;
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u8 num_eps; /* number of endpoints _with_ ep0 */
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u8 dma_channels __deprecated; /* number of dma channels */
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u8 dyn_fifo_size; /* dynamic size in bytes */
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u8 vendor_ctrl __deprecated; /* vendor control reg width */
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u8 vendor_stat __deprecated; /* vendor status reg witdh */
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u8 dma_req_chan __deprecated; /* bitmask for required dma channels */
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u8 ram_bits; /* ram address size */
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struct musb_hdrc_eps_bits *eps_bits __deprecated;
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#ifdef CONFIG_BLACKFIN
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/* A GPIO controlling VRSEL in Blackfin */
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unsigned int gpio_vrsel;
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unsigned int gpio_vrsel_active;
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/* musb CLKIN in Blackfin in MHZ */
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unsigned char clkin;
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#endif
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u32 maximum_speed;
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};
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struct musb_hdrc_platform_data {
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/* MUSB_HOST, MUSB_PERIPHERAL, or MUSB_OTG */
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u8 mode;
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/* for clk_get() */
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const char *clock;
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/* (HOST or OTG) switch VBUS on/off */
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int (*set_vbus)(struct device *dev, int is_on);
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/* (HOST or OTG) mA/2 power supplied on (default = 8mA) */
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u8 power;
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/* (PERIPHERAL) mA/2 max power consumed (default = 100mA) */
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u8 min_power;
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/* (HOST or OTG) msec/2 after VBUS on till power good */
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u8 potpgt;
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/* (HOST or OTG) program PHY for external Vbus */
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unsigned extvbus:1;
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/* Power the device on or off */
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int (*set_power)(int state);
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/* MUSB configuration-specific details */
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const struct musb_hdrc_config *config;
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/* Architecture specific board data */
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void *board_data;
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/* Platform specific struct musb_ops pointer */
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const void *platform_ops;
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};
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enum musb_vbus_id_status {
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MUSB_UNKNOWN = 0,
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MUSB_ID_GROUND,
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MUSB_ID_FLOAT,
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MUSB_VBUS_VALID,
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MUSB_VBUS_OFF,
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};
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#if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
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int musb_mailbox(enum musb_vbus_id_status status);
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#else
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static inline int musb_mailbox(enum musb_vbus_id_status status)
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{
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return 0;
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}
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#endif
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/* TUSB 6010 support */
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#define TUSB6010_OSCCLK_60 16667 /* psec/clk @ 60.0 MHz */
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#define TUSB6010_REFCLK_24 41667 /* psec/clk @ 24.0 MHz XI */
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#define TUSB6010_REFCLK_19 52083 /* psec/clk @ 19.2 MHz CLKIN */
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#ifdef CONFIG_ARCH_OMAP2
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extern int __init tusb6010_setup_interface(
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struct musb_hdrc_platform_data *data,
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unsigned ps_refclk, unsigned waitpin,
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unsigned async_cs, unsigned sync_cs,
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unsigned irq, unsigned dmachan);
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extern int tusb6010_platform_retime(unsigned is_refclk);
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#endif /* OMAP2 */
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#endif /* __LINUX_USB_MUSB_H */
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