![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>
296 lines
5.2 KiB
C
296 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* CPM serial console support.
|
|
*
|
|
* Copyright 2007 Freescale Semiconductor, Inc.
|
|
* Author: Scott Wood <scottwood@freescale.com>
|
|
*
|
|
* It is assumed that the firmware (or the platform file) has already set
|
|
* up the port.
|
|
*/
|
|
|
|
#include "types.h"
|
|
#include "io.h"
|
|
#include "ops.h"
|
|
#include "page.h"
|
|
|
|
struct cpm_scc {
|
|
u32 gsmrl;
|
|
u32 gsmrh;
|
|
u16 psmr;
|
|
u8 res1[2];
|
|
u16 todr;
|
|
u16 dsr;
|
|
u16 scce;
|
|
u8 res2[2];
|
|
u16 sccm;
|
|
u8 res3;
|
|
u8 sccs;
|
|
u8 res4[8];
|
|
};
|
|
|
|
struct cpm_smc {
|
|
u8 res1[2];
|
|
u16 smcmr;
|
|
u8 res2[2];
|
|
u8 smce;
|
|
u8 res3[3];
|
|
u8 smcm;
|
|
u8 res4[5];
|
|
};
|
|
|
|
struct cpm_param {
|
|
u16 rbase;
|
|
u16 tbase;
|
|
u8 rfcr;
|
|
u8 tfcr;
|
|
u16 mrblr;
|
|
u32 rstate;
|
|
u8 res1[4];
|
|
u16 rbptr;
|
|
u8 res2[6];
|
|
u32 tstate;
|
|
u8 res3[4];
|
|
u16 tbptr;
|
|
u8 res4[6];
|
|
u16 maxidl;
|
|
u16 idlc;
|
|
u16 brkln;
|
|
u16 brkec;
|
|
u16 brkcr;
|
|
u16 rmask;
|
|
u8 res5[4];
|
|
};
|
|
|
|
struct cpm_bd {
|
|
u16 sc; /* Status and Control */
|
|
u16 len; /* Data length in buffer */
|
|
u8 *addr; /* Buffer address in host memory */
|
|
};
|
|
|
|
static void *cpcr;
|
|
static struct cpm_param *param;
|
|
static struct cpm_smc *smc;
|
|
static struct cpm_scc *scc;
|
|
static struct cpm_bd *tbdf, *rbdf;
|
|
static u32 cpm_cmd;
|
|
static void *cbd_addr;
|
|
static u32 cbd_offset;
|
|
|
|
static void (*do_cmd)(int op);
|
|
static void (*enable_port)(void);
|
|
static void (*disable_port)(void);
|
|
|
|
#define CPM_CMD_STOP_TX 4
|
|
#define CPM_CMD_RESTART_TX 6
|
|
#define CPM_CMD_INIT_RX_TX 0
|
|
|
|
static void cpm1_cmd(int op)
|
|
{
|
|
while (in_be16(cpcr) & 1)
|
|
;
|
|
|
|
out_be16(cpcr, (op << 8) | cpm_cmd | 1);
|
|
|
|
while (in_be16(cpcr) & 1)
|
|
;
|
|
}
|
|
|
|
static void cpm2_cmd(int op)
|
|
{
|
|
while (in_be32(cpcr) & 0x10000)
|
|
;
|
|
|
|
out_be32(cpcr, op | cpm_cmd | 0x10000);
|
|
|
|
while (in_be32(cpcr) & 0x10000)
|
|
;
|
|
}
|
|
|
|
static void smc_disable_port(void)
|
|
{
|
|
do_cmd(CPM_CMD_STOP_TX);
|
|
out_be16(&smc->smcmr, in_be16(&smc->smcmr) & ~3);
|
|
}
|
|
|
|
static void scc_disable_port(void)
|
|
{
|
|
do_cmd(CPM_CMD_STOP_TX);
|
|
out_be32(&scc->gsmrl, in_be32(&scc->gsmrl) & ~0x30);
|
|
}
|
|
|
|
static void smc_enable_port(void)
|
|
{
|
|
out_be16(&smc->smcmr, in_be16(&smc->smcmr) | 3);
|
|
do_cmd(CPM_CMD_RESTART_TX);
|
|
}
|
|
|
|
static void scc_enable_port(void)
|
|
{
|
|
out_be32(&scc->gsmrl, in_be32(&scc->gsmrl) | 0x30);
|
|
do_cmd(CPM_CMD_RESTART_TX);
|
|
}
|
|
|
|
static int cpm_serial_open(void)
|
|
{
|
|
disable_port();
|
|
|
|
out_8(¶m->rfcr, 0x10);
|
|
out_8(¶m->tfcr, 0x10);
|
|
out_be16(¶m->mrblr, 1);
|
|
out_be16(¶m->maxidl, 0);
|
|
out_be16(¶m->brkec, 0);
|
|
out_be16(¶m->brkln, 0);
|
|
out_be16(¶m->brkcr, 0);
|
|
|
|
rbdf = cbd_addr;
|
|
rbdf->addr = (u8 *)rbdf - 1;
|
|
rbdf->sc = 0xa000;
|
|
rbdf->len = 1;
|
|
|
|
tbdf = rbdf + 1;
|
|
tbdf->addr = (u8 *)rbdf - 2;
|
|
tbdf->sc = 0x2000;
|
|
tbdf->len = 1;
|
|
|
|
sync();
|
|
out_be16(¶m->rbase, cbd_offset);
|
|
out_be16(¶m->tbase, cbd_offset + sizeof(struct cpm_bd));
|
|
|
|
do_cmd(CPM_CMD_INIT_RX_TX);
|
|
|
|
enable_port();
|
|
return 0;
|
|
}
|
|
|
|
static void cpm_serial_putc(unsigned char c)
|
|
{
|
|
while (tbdf->sc & 0x8000)
|
|
barrier();
|
|
|
|
sync();
|
|
|
|
tbdf->addr[0] = c;
|
|
eieio();
|
|
tbdf->sc |= 0x8000;
|
|
}
|
|
|
|
static unsigned char cpm_serial_tstc(void)
|
|
{
|
|
barrier();
|
|
return !(rbdf->sc & 0x8000);
|
|
}
|
|
|
|
static unsigned char cpm_serial_getc(void)
|
|
{
|
|
unsigned char c;
|
|
|
|
while (!cpm_serial_tstc())
|
|
;
|
|
|
|
sync();
|
|
c = rbdf->addr[0];
|
|
eieio();
|
|
rbdf->sc |= 0x8000;
|
|
|
|
return c;
|
|
}
|
|
|
|
int cpm_console_init(void *devp, struct serial_console_data *scdp)
|
|
{
|
|
void *vreg[2];
|
|
u32 reg[2];
|
|
int is_smc = 0, is_cpm2 = 0;
|
|
void *parent, *muram;
|
|
void *muram_addr;
|
|
unsigned long muram_offset, muram_size;
|
|
|
|
if (dt_is_compatible(devp, "fsl,cpm1-smc-uart")) {
|
|
is_smc = 1;
|
|
} else if (dt_is_compatible(devp, "fsl,cpm2-scc-uart")) {
|
|
is_cpm2 = 1;
|
|
} else if (dt_is_compatible(devp, "fsl,cpm2-smc-uart")) {
|
|
is_cpm2 = 1;
|
|
is_smc = 1;
|
|
}
|
|
|
|
if (is_smc) {
|
|
enable_port = smc_enable_port;
|
|
disable_port = smc_disable_port;
|
|
} else {
|
|
enable_port = scc_enable_port;
|
|
disable_port = scc_disable_port;
|
|
}
|
|
|
|
if (is_cpm2)
|
|
do_cmd = cpm2_cmd;
|
|
else
|
|
do_cmd = cpm1_cmd;
|
|
|
|
if (getprop(devp, "fsl,cpm-command", &cpm_cmd, 4) < 4)
|
|
return -1;
|
|
|
|
if (dt_get_virtual_reg(devp, vreg, 2) < 2)
|
|
return -1;
|
|
|
|
if (is_smc)
|
|
smc = vreg[0];
|
|
else
|
|
scc = vreg[0];
|
|
|
|
param = vreg[1];
|
|
|
|
parent = get_parent(devp);
|
|
if (!parent)
|
|
return -1;
|
|
|
|
if (dt_get_virtual_reg(parent, &cpcr, 1) < 1)
|
|
return -1;
|
|
|
|
muram = finddevice("/soc/cpm/muram/data");
|
|
if (!muram)
|
|
return -1;
|
|
|
|
/* For bootwrapper-compatible device trees, we assume that the first
|
|
* entry has at least 128 bytes, and that #address-cells/#data-cells
|
|
* is one for both parent and child.
|
|
*/
|
|
|
|
if (dt_get_virtual_reg(muram, &muram_addr, 1) < 1)
|
|
return -1;
|
|
|
|
if (getprop(muram, "reg", reg, 8) < 8)
|
|
return -1;
|
|
|
|
muram_offset = reg[0];
|
|
muram_size = reg[1];
|
|
|
|
/* Store the buffer descriptors at the end of the first muram chunk.
|
|
* For SMC ports on CPM2-based platforms, relocate the parameter RAM
|
|
* just before the buffer descriptors.
|
|
*/
|
|
|
|
cbd_offset = muram_offset + muram_size - 2 * sizeof(struct cpm_bd);
|
|
|
|
if (is_cpm2 && is_smc) {
|
|
u16 *smc_base = (u16 *)param;
|
|
u16 pram_offset;
|
|
|
|
pram_offset = cbd_offset - 64;
|
|
pram_offset = _ALIGN_DOWN(pram_offset, 64);
|
|
|
|
disable_port();
|
|
out_be16(smc_base, pram_offset);
|
|
param = muram_addr - muram_offset + pram_offset;
|
|
}
|
|
|
|
cbd_addr = muram_addr - muram_offset + cbd_offset;
|
|
|
|
scdp->open = cpm_serial_open;
|
|
scdp->putc = cpm_serial_putc;
|
|
scdp->getc = cpm_serial_getc;
|
|
scdp->tstc = cpm_serial_tstc;
|
|
|
|
return 0;
|
|
}
|