TTY: bfin_jtag_comm, add tty_port
And use open count from there. Switch to tty from there will follow. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Mike Frysinger <vapier@gentoo.org> Cc: uclinux-dist-devel@blackfin.uclinux.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
ba186e7d17
commit
560460b8b7
|
@ -63,8 +63,8 @@ static inline uint32_t bfin_write_emudat_chars(char a, char b, char c, char d)
|
||||||
static struct tty_driver *bfin_jc_driver;
|
static struct tty_driver *bfin_jc_driver;
|
||||||
static struct task_struct *bfin_jc_kthread;
|
static struct task_struct *bfin_jc_kthread;
|
||||||
static struct tty_struct * volatile bfin_jc_tty;
|
static struct tty_struct * volatile bfin_jc_tty;
|
||||||
static unsigned long bfin_jc_count;
|
|
||||||
static DEFINE_MUTEX(bfin_jc_tty_mutex);
|
static DEFINE_MUTEX(bfin_jc_tty_mutex);
|
||||||
|
static struct tty_port port;
|
||||||
static volatile struct circ_buf bfin_jc_write_buf;
|
static volatile struct circ_buf bfin_jc_write_buf;
|
||||||
|
|
||||||
static int
|
static int
|
||||||
|
@ -150,8 +150,7 @@ static int
|
||||||
bfin_jc_open(struct tty_struct *tty, struct file *filp)
|
bfin_jc_open(struct tty_struct *tty, struct file *filp)
|
||||||
{
|
{
|
||||||
mutex_lock(&bfin_jc_tty_mutex);
|
mutex_lock(&bfin_jc_tty_mutex);
|
||||||
pr_debug("open %lu\n", bfin_jc_count);
|
port.count++;
|
||||||
++bfin_jc_count;
|
|
||||||
bfin_jc_tty = tty;
|
bfin_jc_tty = tty;
|
||||||
wake_up_process(bfin_jc_kthread);
|
wake_up_process(bfin_jc_kthread);
|
||||||
mutex_unlock(&bfin_jc_tty_mutex);
|
mutex_unlock(&bfin_jc_tty_mutex);
|
||||||
|
@ -162,8 +161,7 @@ static void
|
||||||
bfin_jc_close(struct tty_struct *tty, struct file *filp)
|
bfin_jc_close(struct tty_struct *tty, struct file *filp)
|
||||||
{
|
{
|
||||||
mutex_lock(&bfin_jc_tty_mutex);
|
mutex_lock(&bfin_jc_tty_mutex);
|
||||||
pr_debug("close %lu\n", bfin_jc_count);
|
if (--port.count == 0)
|
||||||
if (--bfin_jc_count == 0)
|
|
||||||
bfin_jc_tty = NULL;
|
bfin_jc_tty = NULL;
|
||||||
wake_up_process(bfin_jc_kthread);
|
wake_up_process(bfin_jc_kthread);
|
||||||
mutex_unlock(&bfin_jc_tty_mutex);
|
mutex_unlock(&bfin_jc_tty_mutex);
|
||||||
|
@ -242,6 +240,8 @@ static int __init bfin_jc_init(void)
|
||||||
{
|
{
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
|
tty_port_init(&port);
|
||||||
|
|
||||||
bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
|
bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
|
||||||
if (IS_ERR(bfin_jc_kthread))
|
if (IS_ERR(bfin_jc_kthread))
|
||||||
return PTR_ERR(bfin_jc_kthread);
|
return PTR_ERR(bfin_jc_kthread);
|
||||||
|
|
Loading…
Reference in New Issue