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[PATCH] hvc_console: Register ops when setting up hvc_console

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When registering the hvc console port, register a list of ops (read and write)
to go with it, instead of calling fixed function names.

This allows different ports to encode the data differently.

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 17:56:25 -07:00 committed by Linus Torvalds
parent acad9559f1
commit 030ffad23f
3 changed files with 27 additions and 12 deletions
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21
drivers/char/hvc_console.c
View file

@ -85,6 +85,7 @@ struct hvc_struct {
char outbuf[N_OUTBUF] __ALIGNED__;
int n_outbuf;
uint32_t vtermno;
struct hv_ops *ops;
int irq_requested;
int irq;
struct list_head next;
@ -142,6 +143,7 @@ struct hvc_struct *hvc_get_by_index(int index)
* console interfaces but can still be used as a tty device. This has to be
* static because kmalloc will not work during early console init.
*/
static struct hv_ops *cons_ops[MAX_NR_HVC_CONSOLES];
static uint32_t vtermnos[MAX_NR_HVC_CONSOLES] =
{[0 ... MAX_NR_HVC_CONSOLES - 1] = -1};
@ -154,14 +156,14 @@ void hvc_console_print(struct console *co, const char *b, unsigned count)
{
char c[16] __ALIGNED__;
unsigned i = 0, n = 0;
int r, donecr = 0;
int r, donecr = 0, index = co->index;
/* Console access attempt outside of acceptable console range. */
if (co->index >= MAX_NR_HVC_CONSOLES)
if (index >= MAX_NR_HVC_CONSOLES)
return;
/* This console adapter was removed so it is not useable. */
if (vtermnos[co->index] < 0)
if (vtermnos[index] < 0)
return;
while (count > 0 || i > 0) {
@ -175,7 +177,7 @@ void hvc_console_print(struct console *co, const char *b, unsigned count)
--count;
}
} else {
r = hvc_put_chars(vtermnos[co->index], c, i);
r = cons_ops[index]->put_chars(vtermnos[index], c, i);
if (r < 0) {
/* throw away chars on error */
i = 0;
@ -245,7 +247,7 @@ console_initcall(hvc_console_init);
* vty adapters do NOT get an hvc_instantiate() callback since they
* appear after early console init.
*/
int hvc_instantiate(uint32_t vtermno, int index)
int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops)
{
struct hvc_struct *hp;
@ -263,6 +265,7 @@ int hvc_instantiate(uint32_t vtermno, int index)
}
vtermnos[index] = vtermno;
cons_ops[index] = ops;
/* reserve all indices upto and including this index */
if (last_hvc < index)
@ -466,7 +469,7 @@ static void hvc_push(struct hvc_struct *hp)
{
int n;
n = hvc_put_chars(hp->vtermno, hp->outbuf, hp->n_outbuf);
n = hp->ops->put_chars(hp->vtermno, hp->outbuf, hp->n_outbuf);
if (n <= 0) {
if (n == 0)
return;
@ -604,7 +607,7 @@ static int hvc_poll(struct hvc_struct *hp)
break;
}
n = hvc_get_chars(hp->vtermno, buf, count);
n = hp->ops->get_chars(hp->vtermno, buf, count);
if (n <= 0) {
/* Hangup the tty when disconnected from host */
if (n == -EPIPE) {
@ -737,7 +740,8 @@ static struct kobj_type hvc_kobj_type = {
.release = destroy_hvc_struct,
};
struct hvc_struct __devinit *hvc_alloc(uint32_t vtermno, int irq)
struct hvc_struct __devinit *hvc_alloc(uint32_t vtermno, int irq,
struct hv_ops *ops)
{
struct hvc_struct *hp;
int i;
@ -750,6 +754,7 @@ struct hvc_struct __devinit *hvc_alloc(uint32_t vtermno, int irq)
hp->vtermno = vtermno;
hp->irq = irq;
hp->ops = ops;
kobject_init(&hp->kobj);
hp->kobj.ktype = &hvc_kobj_type;

9
drivers/char/hvc_vio.c
View file

@ -43,6 +43,11 @@ static struct vio_device_id hvc_driver_table[] __devinitdata = {
};
MODULE_DEVICE_TABLE(vio, hvc_driver_table);
static struct hv_ops hvc_get_put_ops = {
.get_chars = hvc_get_chars,
.put_chars = hvc_put_chars,
};
static int __devinit hvc_vio_probe(struct vio_dev *vdev,
const struct vio_device_id *id)
{
@ -52,7 +57,7 @@ static int __devinit hvc_vio_probe(struct vio_dev *vdev,
if (!vdev || !id)
return -EPERM;
hp = hvc_alloc(vdev->unit_address, vdev->irq);
hp = hvc_alloc(vdev->unit_address, vdev->irq, &hvc_get_put_ops);
if (IS_ERR(hp))
return PTR_ERR(hp);
dev_set_drvdata(&vdev->dev, hp);
@ -115,7 +120,7 @@ static int hvc_find_vtys(void)
continue;
if (device_is_compatible(vty, "hvterm1")) {
hvc_instantiate(*vtermno, num_found);
hvc_instantiate(*vtermno, num_found, &hvc_get_put_ops);
++num_found;
}
}

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

@ -30,15 +30,20 @@
#define MAX_NR_HVC_CONSOLES 16
/* implemented by a low level driver */
struct hv_ops {
int (*get_chars)(uint32_t vtermno, char *buf, int count);
int (*put_chars)(uint32_t vtermno, const char *buf, int count);
};
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);
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);
extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops);
/* register a vterm for hvc tty operation (module_init or hotplug add) */
extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq);
extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq,
struct hv_ops *ops);
/* 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 */