2 * vio driver interface to hvc_console.c
4 * This code was moved here to allow the remaing code to be reused as a
5 * generic polling mode with semi-reliable transport driver core to the
6 * console and tty subsystems.
9 * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
10 * Copyright (C) 2001 Paul Mackerras <paulus@au.ibm.com>, IBM
11 * Copyright (C) 2004 Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
12 * Copyright (C) 2004 IBM Corporation
14 * Additional Author(s):
15 * Ryan S. Arnold <rsa@us.ibm.com>
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2 of the License, or
20 * (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #include <linux/types.h>
33 #include <linux/init.h>
34 #include <asm/hvconsole.h>
38 char hvc_driver_name[] = "hvc_console";
40 static struct vio_device_id hvc_driver_table[] __devinitdata = {
41 {"serial", "hvterm1"},
44 MODULE_DEVICE_TABLE(vio, hvc_driver_table);
46 static struct hv_ops hvc_get_put_ops = {
47 .get_chars = hvc_get_chars,
48 .put_chars = hvc_put_chars,
51 static int __devinit hvc_vio_probe(struct vio_dev *vdev,
52 const struct vio_device_id *id)
54 struct hvc_struct *hp;
56 /* probed with invalid parameters. */
60 hp = hvc_alloc(vdev->unit_address, vdev->irq, &hvc_get_put_ops);
63 dev_set_drvdata(&vdev->dev, hp);
68 static int __devexit hvc_vio_remove(struct vio_dev *vdev)
70 struct hvc_struct *hp = dev_get_drvdata(&vdev->dev);
72 return hvc_remove(hp);
75 static struct vio_driver hvc_vio_driver = {
76 .name = hvc_driver_name,
77 .id_table = hvc_driver_table,
78 .probe = hvc_vio_probe,
79 .remove = hvc_vio_remove,
85 static int hvc_vio_init(void)
89 /* Register as a vio device to receive callbacks */
90 rc = vio_register_driver(&hvc_vio_driver);
94 module_init(hvc_vio_init); /* after drivers/char/hvc_console.c */
96 static void hvc_vio_exit(void)
98 vio_unregister_driver(&hvc_vio_driver);
100 module_exit(hvc_vio_exit);
102 /* the device tree order defines our numbering */
103 static int hvc_find_vtys(void)
105 struct device_node *vty;
108 for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL;
109 vty = of_find_node_by_name(vty, "vty")) {
112 /* We have statically defined space for only a certain number
113 * of console adapters.
115 if (num_found >= MAX_NR_HVC_CONSOLES)
118 vtermno = (uint32_t *)get_property(vty, "reg", NULL);
122 if (device_is_compatible(vty, "hvterm1")) {
123 hvc_instantiate(*vtermno, num_found, &hvc_get_put_ops);
130 console_initcall(hvc_find_vtys);