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-rw-r--r--drivers/char/Kconfig6
-rw-r--r--drivers/char/Makefile1
-rw-r--r--drivers/char/bsr.c84
-rw-r--r--drivers/char/hvc_console.c13
-rw-r--r--drivers/char/hvc_console.h2
-rw-r--r--drivers/char/hvc_iseries.c4
-rw-r--r--drivers/char/hvc_udbg.c96
-rw-r--r--drivers/char/hvc_vio.c4
-rw-r--r--drivers/char/hvcs.c2
-rw-r--r--drivers/char/hvsi.c2
10 files changed, 174 insertions, 40 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 8783457b93d3..c602b547cc6e 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -641,6 +641,12 @@ config HVC_XEN
help
Xen virtual console device driver
+config HVC_UDBG
+ bool "udbg based fake hypervisor console"
+ depends on PPC && EXPERIMENTAL
+ select HVC_DRIVER
+ default n
+
config VIRTIO_CONSOLE
tristate "Virtio console"
depends on VIRTIO
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 36151bae0d72..9caf5b5ad1c0 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -51,6 +51,7 @@ obj-$(CONFIG_HVC_DRIVER) += hvc_console.o
obj-$(CONFIG_HVC_IRQ) += hvc_irq.o
obj-$(CONFIG_HVC_XEN) += hvc_xen.o
obj-$(CONFIG_HVC_IUCV) += hvc_iucv.o
+obj-$(CONFIG_HVC_UDBG) += hvc_udbg.o
obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o
obj-$(CONFIG_RAW_DRIVER) += raw.o
obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o
diff --git a/drivers/char/bsr.c b/drivers/char/bsr.c
index 456f54db73e2..977dfb1096a0 100644
--- a/drivers/char/bsr.c
+++ b/drivers/char/bsr.c
@@ -60,6 +60,8 @@ struct bsr_dev {
unsigned bsr_num; /* bsr id number for its type */
int bsr_minor;
+ struct list_head bsr_list;
+
dev_t bsr_dev;
struct cdev bsr_cdev;
struct device *bsr_device;
@@ -67,8 +69,8 @@ struct bsr_dev {
};
-static unsigned num_bsr_devs;
-static struct bsr_dev *bsr_devs;
+static unsigned total_bsr_devs;
+static struct list_head bsr_devs = LIST_HEAD_INIT(bsr_devs);
static struct class *bsr_class;
static int bsr_major;
@@ -146,24 +148,25 @@ const static struct file_operations bsr_fops = {
static void bsr_cleanup_devs(void)
{
- int i;
- for (i=0 ; i < num_bsr_devs; i++) {
- struct bsr_dev *cur = bsr_devs + i;
+ struct bsr_dev *cur, *n;
+
+ list_for_each_entry_safe(cur, n, &bsr_devs, bsr_list) {
if (cur->bsr_device) {
cdev_del(&cur->bsr_cdev);
device_del(cur->bsr_device);
}
+ list_del(&cur->bsr_list);
+ kfree(cur);
}
-
- kfree(bsr_devs);
}
-static int bsr_create_devs(struct device_node *bn)
+static int bsr_add_node(struct device_node *bn)
{
- int bsr_stride_len, bsr_bytes_len;
+ int bsr_stride_len, bsr_bytes_len, num_bsr_devs;
const u32 *bsr_stride;
const u32 *bsr_bytes;
unsigned i;
+ int ret = -ENODEV;
bsr_stride = of_get_property(bn, "ibm,lock-stride", &bsr_stride_len);
bsr_bytes = of_get_property(bn, "ibm,#lock-bytes", &bsr_bytes_len);
@@ -171,35 +174,36 @@ static int bsr_create_devs(struct device_node *bn)
if (!bsr_stride || !bsr_bytes ||
(bsr_stride_len != bsr_bytes_len)) {
printk(KERN_ERR "bsr of-node has missing/incorrect property\n");
- return -ENODEV;
+ return ret;
}
num_bsr_devs = bsr_bytes_len / sizeof(u32);
- /* only a warning, its informational since we'll fail and exit */
- WARN_ON(num_bsr_devs > BSR_MAX_DEVS);
-
- bsr_devs = kzalloc(sizeof(struct bsr_dev) * num_bsr_devs, GFP_KERNEL);
- if (!bsr_devs)
- return -ENOMEM;
-
for (i = 0 ; i < num_bsr_devs; i++) {
- struct bsr_dev *cur = bsr_devs + i;
+ struct bsr_dev *cur = kzalloc(sizeof(struct bsr_dev),
+ GFP_KERNEL);
struct resource res;
int result;
+ if (!cur) {
+ printk(KERN_ERR "Unable to alloc bsr dev\n");
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
result = of_address_to_resource(bn, i, &res);
if (result < 0) {
- printk(KERN_ERR "bsr of-node has invalid reg property\n");
- goto out_err;
+ printk(KERN_ERR "bsr of-node has invalid reg property, skipping\n");
+ kfree(cur);
+ continue;
}
- cur->bsr_minor = i;
+ cur->bsr_minor = i + total_bsr_devs;
cur->bsr_addr = res.start;
cur->bsr_len = res.end - res.start + 1;
cur->bsr_bytes = bsr_bytes[i];
cur->bsr_stride = bsr_stride[i];
- cur->bsr_dev = MKDEV(bsr_major, i);
+ cur->bsr_dev = MKDEV(bsr_major, i + total_bsr_devs);
switch(cur->bsr_bytes) {
case 8:
@@ -220,14 +224,15 @@ static int bsr_create_devs(struct device_node *bn)
}
cur->bsr_num = bsr_types[cur->bsr_type];
- bsr_types[cur->bsr_type] = cur->bsr_num + 1;
snprintf(cur->bsr_name, 32, "bsr%d_%d",
cur->bsr_bytes, cur->bsr_num);
cdev_init(&cur->bsr_cdev, &bsr_fops);
result = cdev_add(&cur->bsr_cdev, cur->bsr_dev, 1);
- if (result)
+ if (result) {
+ kfree(cur);
goto out_err;
+ }
cur->bsr_device = device_create(bsr_class, NULL, cur->bsr_dev,
cur, cur->bsr_name);
@@ -235,16 +240,37 @@ static int bsr_create_devs(struct device_node *bn)
printk(KERN_ERR "device_create failed for %s\n",
cur->bsr_name);
cdev_del(&cur->bsr_cdev);
+ kfree(cur);
goto out_err;
}
+
+ bsr_types[cur->bsr_type] = cur->bsr_num + 1;
+ list_add_tail(&cur->bsr_list, &bsr_devs);
}
+ total_bsr_devs += num_bsr_devs;
+
return 0;
out_err:
bsr_cleanup_devs();
- return -ENODEV;
+ return ret;
+}
+
+static int bsr_create_devs(struct device_node *bn)
+{
+ int ret;
+
+ while (bn) {
+ ret = bsr_add_node(bn);
+ if (ret) {
+ of_node_put(bn);
+ return ret;
+ }
+ bn = of_find_compatible_node(bn, NULL, "ibm,bsr");
+ }
+ return 0;
}
static int __init bsr_init(void)
@@ -254,7 +280,7 @@ static int __init bsr_init(void)
int ret = -ENODEV;
int result;
- np = of_find_compatible_node(NULL, "ibm,bsr", "ibm,bsr");
+ np = of_find_compatible_node(NULL, NULL, "ibm,bsr");
if (!np)
goto out_err;
@@ -272,10 +298,10 @@ static int __init bsr_init(void)
goto out_err_2;
}
- if ((ret = bsr_create_devs(np)) < 0)
+ if ((ret = bsr_create_devs(np)) < 0) {
+ np = NULL;
goto out_err_3;
-
- of_node_put(np);
+ }
return 0;
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 5b819b12675a..fb57f67bb427 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -642,8 +642,11 @@ int hvc_poll(struct hvc_struct *hp)
/* Handle the SysRq Hack */
/* XXX should support a sequence */
if (buf[i] == '\x0f') { /* ^O */
- sysrq_pressed = 1;
- continue;
+ /* if ^O is pressed again, reset
+ * sysrq_pressed and flip ^O char */
+ sysrq_pressed = !sysrq_pressed;
+ if (sysrq_pressed)
+ continue;
} else if (sysrq_pressed) {
handle_sysrq(buf[i], tty);
sysrq_pressed = 0;
@@ -689,10 +692,8 @@ EXPORT_SYMBOL_GPL(hvc_poll);
*/
void hvc_resize(struct hvc_struct *hp, struct winsize ws)
{
- if ((hp->ws.ws_row != ws.ws_row) || (hp->ws.ws_col != ws.ws_col)) {
- hp->ws = ws;
- schedule_work(&hp->tty_resize);
- }
+ hp->ws = ws;
+ schedule_work(&hp->tty_resize);
}
/*
diff --git a/drivers/char/hvc_console.h b/drivers/char/hvc_console.h
index 8297dbc2e6ec..3c85d78c975c 100644
--- a/drivers/char/hvc_console.h
+++ b/drivers/char/hvc_console.h
@@ -48,7 +48,7 @@ struct hvc_struct {
spinlock_t lock;
int index;
struct tty_struct *tty;
- unsigned int count;
+ int count;
int do_wakeup;
char *outbuf;
int outbuf_size;
diff --git a/drivers/char/hvc_iseries.c b/drivers/char/hvc_iseries.c
index b74a2f8ab908..449727b6166d 100644
--- a/drivers/char/hvc_iseries.c
+++ b/drivers/char/hvc_iseries.c
@@ -575,8 +575,10 @@ static int __init hvc_find_vtys(void)
* of console adapters.
*/
if ((num_found >= MAX_NR_HVC_CONSOLES) ||
- (num_found >= VTTY_PORTS))
+ (num_found >= VTTY_PORTS)) {
+ of_node_put(vty);
break;
+ }
vtermno = of_get_property(vty, "reg", NULL);
if (!vtermno)
diff --git a/drivers/char/hvc_udbg.c b/drivers/char/hvc_udbg.c
new file mode 100644
index 000000000000..bd63ba878a56
--- /dev/null
+++ b/drivers/char/hvc_udbg.c
@@ -0,0 +1,96 @@
+/*
+ * 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);
diff --git a/drivers/char/hvc_vio.c b/drivers/char/hvc_vio.c
index 019e0b58593d..bd62dc86b47d 100644
--- a/drivers/char/hvc_vio.c
+++ b/drivers/char/hvc_vio.c
@@ -153,8 +153,10 @@ static int hvc_find_vtys(void)
/* We have statically defined space for only a certain number
* of console adapters.
*/
- if (num_found >= MAX_NR_HVC_CONSOLES)
+ if (num_found >= MAX_NR_HVC_CONSOLES) {
+ of_node_put(vty);
break;
+ }
vtermno = of_get_property(vty, "reg", NULL);
if (!vtermno)
diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 473d9b14439a..6e6eb445d374 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -269,7 +269,7 @@ struct hvcs_struct {
unsigned int index;
struct tty_struct *tty;
- unsigned int open_count;
+ int open_count;
/*
* Used to tell the driver kernel_thread what operations need to take
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index 59c6f9ab94e4..af055287271a 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -75,7 +75,7 @@ struct hvsi_struct {
spinlock_t lock;
int index;
struct tty_struct *tty;
- unsigned int count;
+ int count;
uint8_t throttle_buf[128];
uint8_t outbuf[N_OUTBUF]; /* to implement write_room and chars_in_buffer */
/* inbuf is for packet reassembly. leave a little room for leftovers. */
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-14 18:47:15 +0300