/* * 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; i++) udbg_putc(buf[i]); return i; } 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; } static 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; BUG_ON(hvc_udbg_dev); hp = hvc_alloc(0, NO_IRQ, &hvc_udbg_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); hvc_udbg_dev = hp; return 0; } module_init(hvc_udbg_init); static void __exit hvc_udbg_exit(void) { if (hvc_udbg_dev) hvc_remove(hvc_udbg_dev); } module_exit(hvc_udbg_exit); static int __init hvc_udbg_console_init(void) { hvc_instantiate(0, 0, &hvc_udbg_ops); add_preferred_console("hvc", 0, NULL); return 0; } console_initcall(hvc_udbg_console_init);