73 строки
1.7 KiB
C
73 строки
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Simple kernel console driver for STM devices
|
|
* Copyright (c) 2014, Intel Corporation.
|
|
*
|
|
* STM console will send kernel messages over STM devices to a trace host.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/console.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/stm.h>
|
|
|
|
static int stm_console_link(struct stm_source_data *data);
|
|
static void stm_console_unlink(struct stm_source_data *data);
|
|
|
|
static struct stm_console {
|
|
struct stm_source_data data;
|
|
struct console console;
|
|
} stm_console = {
|
|
.data = {
|
|
.name = "console",
|
|
.nr_chans = 1,
|
|
.link = stm_console_link,
|
|
.unlink = stm_console_unlink,
|
|
},
|
|
};
|
|
|
|
static void
|
|
stm_console_write(struct console *con, const char *buf, unsigned len)
|
|
{
|
|
struct stm_console *sc = container_of(con, struct stm_console, console);
|
|
|
|
stm_source_write(&sc->data, 0, buf, len);
|
|
}
|
|
|
|
static int stm_console_link(struct stm_source_data *data)
|
|
{
|
|
struct stm_console *sc = container_of(data, struct stm_console, data);
|
|
|
|
strcpy(sc->console.name, "stm_console");
|
|
sc->console.write = stm_console_write;
|
|
sc->console.flags = CON_ENABLED | CON_PRINTBUFFER;
|
|
register_console(&sc->console);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void stm_console_unlink(struct stm_source_data *data)
|
|
{
|
|
struct stm_console *sc = container_of(data, struct stm_console, data);
|
|
|
|
unregister_console(&sc->console);
|
|
}
|
|
|
|
static int stm_console_init(void)
|
|
{
|
|
return stm_source_register_device(NULL, &stm_console.data);
|
|
}
|
|
|
|
static void stm_console_exit(void)
|
|
{
|
|
stm_source_unregister_device(&stm_console.data);
|
|
}
|
|
|
|
module_init(stm_console_init);
|
|
module_exit(stm_console_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("stm_console driver");
|
|
MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@linux.intel.com>");
|