cregit-Linux how code gets into the kernel

Release 4.7 drivers/tty/hvc/hvc_udbg.c

Directory: drivers/tty/hvc
/*
 * udbg interface to hvc_console.c
 *
 * (C) Copyright David Gibson, IBM Corporation 2008.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/console.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/irq.h>

#include <asm/udbg.h>

#include "hvc_console.h"


struct hvc_struct *hvc_udbg_dev;


static int hvc_udbg_put(uint32_t vtermno, const char *buf, int count) { int i; for (i = 0; i < count && udbg_putc; i++) udbg_putc(buf[i]); return i; }

Contributors

PersonTokensPropCommitsCommitProp
david gibsondavid gibson4495.65%150.00%
benjamin herrenschmidtbenjamin herrenschmidt24.35%150.00%
Total46100.00%2100.00%


static int hvc_udbg_get(uint32_t vtermno, char *buf, int count) { int i, c; if (!udbg_getc_poll) return 0; for (i = 0; i < count; i++) { if ((c = udbg_getc_poll()) == -1) break; buf[i] = c; } return i; }

Contributors

PersonTokensPropCommitsCommitProp
david gibsondavid gibson67100.00%1100.00%
Total67100.00%1100.00%

static const struct hv_ops hvc_udbg_ops = { .get_chars = hvc_udbg_get, .put_chars = hvc_udbg_put, };
static int __init hvc_udbg_init(void) { struct hvc_struct *hp; if (!udbg_putc) return -ENODEV; BUG_ON(hvc_udbg_dev); hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); hvc_udbg_dev = hp; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
david gibsondavid gibson5283.87%133.33%
benjamin herrenschmidtbenjamin herrenschmidt914.52%133.33%
alan coxalan cox11.61%133.33%
Total62100.00%3100.00%

device_initcall(hvc_udbg_init);
static int __init hvc_udbg_console_init(void) { if (!udbg_putc) return -ENODEV; hvc_instantiate(0, 0, &hvc_udbg_ops); add_preferred_console("hvc", 0, NULL); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
david gibsondavid gibson3177.50%150.00%
benjamin herrenschmidtbenjamin herrenschmidt922.50%150.00%
Total40100.00%2100.00%

console_initcall(hvc_udbg_console_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
david gibsondavid gibson25391.67%120.00%
benjamin herrenschmidtbenjamin herrenschmidt207.25%120.00%
alan coxalan cox10.36%120.00%
rusty russellrusty russell10.36%120.00%
paul gortmakerpaul gortmaker10.36%120.00%
Total276100.00%5100.00%
Directory: drivers/tty/hvc
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