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[PATCH] hvc_console: Separate hvc_console and vio code 2

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Remove all the vio device driver code from hvc_console.c

This will allow us to separate hvsi, hvc, and allow hvc_console to be used
without the ppc64 vio layer.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Milton Miller 2005-07-07 17:56:24 -07:00 committed by Linus Torvalds
parent d5ee257c33
commit acad9559f1
5 changed files with 145 additions and 74 deletions
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33
arch/ppc64/kernel/hvconsole.c
View File

@ -27,7 +27,6 @@
#include <linux/module.h>
#include <asm/hvcall.h>
#include <asm/hvconsole.h>
#include <asm/prom.h>
/**
* hvc_get_chars - retrieve characters from firmware for denoted vterm adatper
@ -88,35 +87,3 @@ int hvc_put_chars(uint32_t vtermno, const char *buf, int count)
}
EXPORT_SYMBOL(hvc_put_chars);
/*
* We hope/assume that the first vty found corresponds to the first console
* device.
*/
static int hvc_find_vtys(void)
{
struct device_node *vty;
int num_found = 0;
for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL;
vty = of_find_node_by_name(vty, "vty")) {
uint32_t *vtermno;
/* We have statically defined space for only a certain number of
* console adapters. */
if (num_found >= MAX_NR_HVC_CONSOLES)
break;
vtermno = (uint32_t *)get_property(vty, "reg", NULL);
if (!vtermno)
continue;
if (device_is_compatible(vty, "hvterm1")) {
hvc_instantiate(*vtermno, num_found);
++num_found;
}
}
return num_found;
}
console_initcall(hvc_find_vtys);

2
drivers/char/Makefile
View File

@ -40,7 +40,7 @@ obj-$(CONFIG_N_HDLC) += n_hdlc.o
obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o
obj-$(CONFIG_SX) += sx.o generic_serial.o
obj-$(CONFIG_RIO) += rio/ generic_serial.o
obj-$(CONFIG_HVC_CONSOLE) += hvc_console.o hvsi.o
obj-$(CONFIG_HVC_CONSOLE) += hvc_console.o hvc_vio.o hvsi.o
obj-$(CONFIG_RAW_DRIVER) += raw.o
obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o
obj-$(CONFIG_MMTIMER) += mmtimer.o

50
drivers/char/hvc_console.c
View File

@ -41,7 +41,6 @@
#include <linux/delay.h>
#include <asm/uaccess.h>
#include <asm/hvconsole.h>
#include <asm/vio.h>
#define HVC_MAJOR 229
#define HVC_MINOR 0
@ -90,7 +89,6 @@ struct hvc_struct {
int irq;
struct list_head next;
struct kobject kobj; /* ref count & hvc_struct lifetime */
struct vio_dev *vdev;
};
/* dynamic list of hvc_struct instances */
@ -279,6 +277,7 @@ int hvc_instantiate(uint32_t vtermno, int index)
return 0;
}
EXPORT_SYMBOL(hvc_instantiate);
/* Wake the sleeping khvcd */
static void hvc_kick(void)
@ -738,26 +737,19 @@ static struct kobj_type hvc_kobj_type = {
.release = destroy_hvc_struct,
};
static int __devinit hvc_probe(
struct vio_dev *dev,
const struct vio_device_id *id)
struct hvc_struct __devinit *hvc_alloc(uint32_t vtermno, int irq)
{
struct hvc_struct *hp;
int i;
/* probed with invalid parameters. */
if (!dev || !id)
return -EPERM;
hp = kmalloc(sizeof(*hp), GFP_KERNEL);
if (!hp)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
memset(hp, 0x00, sizeof(*hp));
hp->vtermno = dev->unit_address;
hp->vdev = dev;
hp->vdev->dev.driver_data = hp;
hp->irq = dev->irq;
hp->vtermno = vtermno;
hp->irq = irq;
kobject_init(&hp->kobj);
hp->kobj.ktype = &hvc_kobj_type;
@ -782,12 +774,12 @@ static int __devinit hvc_probe(
list_add_tail(&(hp->next), &hvc_structs);
spin_unlock(&hvc_structs_lock);
return 0;
return hp;
}
EXPORT_SYMBOL(hvc_alloc);
static int __devexit hvc_remove(struct vio_dev *dev)
int __devexit hvc_remove(struct hvc_struct *hp)
{
struct hvc_struct *hp = dev->dev.driver_data;
unsigned long flags;
struct kobject *kobjp;
struct tty_struct *tty;
@ -820,28 +812,12 @@ static int __devexit hvc_remove(struct vio_dev *dev)
tty_hangup(tty);
return 0;
}
char hvc_driver_name[] = "hvc_console";
static struct vio_device_id hvc_driver_table[] __devinitdata= {
{"serial", "hvterm1"},
{ NULL, }
};
MODULE_DEVICE_TABLE(vio, hvc_driver_table);
static struct vio_driver hvc_vio_driver = {
.name = hvc_driver_name,
.id_table = hvc_driver_table,
.probe = hvc_probe,
.remove = hvc_remove,
};
EXPORT_SYMBOL(hvc_remove);
/* Driver initialization. Follow console initialization. This is where the TTY
* interfaces start to become available. */
int __init hvc_init(void)
{
int rc;
/* We need more than hvc_count adapters due to hotplug additions. */
hvc_driver = alloc_tty_driver(HVC_ALLOC_TTY_ADAPTERS);
if (!hvc_driver)
@ -870,10 +846,7 @@ int __init hvc_init(void)
return -EIO;
}
/* Register as a vio device to receive callbacks */
rc = vio_register_driver(&hvc_vio_driver);
return rc;
return 0;
}
module_init(hvc_init);
@ -884,7 +857,6 @@ static void __exit hvc_exit(void)
{
kthread_stop(hvc_task);
vio_unregister_driver(&hvc_vio_driver);
tty_unregister_driver(hvc_driver);
/* return tty_struct instances allocated in hvc_init(). */
put_tty_driver(hvc_driver);

125
drivers/char/hvc_vio.c Normal file
View File

@ -0,0 +1,125 @@
/*
* vio driver interface to hvc_console.c
*
* This code was moved here to allow the remaing code to be reused as a
* generic polling mode with semi-reliable transport driver core to the
* console and tty subsystems.
*
*
* Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
* Copyright (C) 2001 Paul Mackerras <paulus@au.ibm.com>, IBM
* Copyright (C) 2004 Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
* Copyright (C) 2004 IBM Corporation
*
* Additional Author(s):
* Ryan S. Arnold <rsa@us.ibm.com>
*
* 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/types.h>
#include <linux/init.h>
#include <asm/hvconsole.h>
#include <asm/vio.h>
#include <asm/prom.h>
char hvc_driver_name[] = "hvc_console";
static struct vio_device_id hvc_driver_table[] __devinitdata = {
{"serial", "hvterm1"},
{ NULL, }
};
MODULE_DEVICE_TABLE(vio, hvc_driver_table);
static int __devinit hvc_vio_probe(struct vio_dev *vdev,
const struct vio_device_id *id)
{
struct hvc_struct *hp;
/* probed with invalid parameters. */
if (!vdev || !id)
return -EPERM;
hp = hvc_alloc(vdev->unit_address, vdev->irq);
if (IS_ERR(hp))
return PTR_ERR(hp);
dev_set_drvdata(&vdev->dev, hp);
return 0;
}
static int __devexit hvc_vio_remove(struct vio_dev *vdev)
{
struct hvc_struct *hp = dev_get_drvdata(&vdev->dev);
return hvc_remove(hp);
}
static struct vio_driver hvc_vio_driver = {
.name = hvc_driver_name,
.id_table = hvc_driver_table,
.probe = hvc_vio_probe,
.remove = hvc_vio_remove,
.driver = {
.owner = THIS_MODULE,
}
};
static int hvc_vio_init(void)
{
int rc;
/* Register as a vio device to receive callbacks */
rc = vio_register_driver(&hvc_vio_driver);
return rc;
}
module_init(hvc_vio_init); /* after drivers/char/hvc_console.c */
static void hvc_vio_exit(void)
{
vio_unregister_driver(&hvc_vio_driver);
}
module_exit(hvc_vio_exit);
/* the device tree order defines our numbering */
static int hvc_find_vtys(void)
{
struct device_node *vty;
int num_found = 0;
for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL;
vty = of_find_node_by_name(vty, "vty")) {
uint32_t *vtermno;
/* We have statically defined space for only a certain number
* of console adapters.
*/
if (num_found >= MAX_NR_HVC_CONSOLES)
break;
vtermno = (uint32_t *)get_property(vty, "reg", NULL);
if (!vtermno)
continue;
if (device_is_compatible(vty, "hvterm1")) {
hvc_instantiate(*vtermno, num_found);
++num_found;
}
}
return num_found;
}
console_initcall(hvc_find_vtys);

9
include/asm-ppc64/hvconsole.h
View File

@ -29,9 +29,16 @@
*/
#define MAX_NR_HVC_CONSOLES 16
/* implemented by a low level driver */
extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
/* Register a vterm and a slot index for use as a console */
struct hvc_struct;
/* Register a vterm and a slot index for use as a console (console_init) */
extern int hvc_instantiate(uint32_t vtermno, int index);
/* register a vterm for hvc tty operation (module_init or hotplug add) */
extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq);
/* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */
extern int __devexit hvc_remove(struct hvc_struct *hp);
#endif /* _PPC64_HVCONSOLE_H */