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path: root/drivers/tty/synclink_gt.c
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Diffstat (limited to 'drivers/tty/synclink_gt.c')
-rw-r--r--drivers/tty/synclink_gt.c61
1 files changed, 35 insertions, 26 deletions
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index aba1e59f4a8..aa9eece35c3 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -317,8 +317,7 @@ struct slgt_info {
unsigned char *tx_buf;
int tx_count;
- char flag_buf[MAX_ASYNC_BUFFER_SIZE];
- char char_buf[MAX_ASYNC_BUFFER_SIZE];
+ char *flag_buf;
bool drop_rts_on_tx_done;
struct _input_signal_events input_signal_events;
@@ -683,7 +682,7 @@ static int open(struct tty_struct *tty, struct file *filp)
}
mutex_lock(&info->port.mutex);
- info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
spin_lock_irqsave(&info->netlock, flags);
if (info->netcount) {
@@ -786,7 +785,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
/* Handle transition to B0 status */
if (old_termios->c_cflag & CBAUD &&
!(tty->termios.c_cflag & CBAUD)) {
- info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
spin_lock_irqsave(&info->lock,flags);
set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
@@ -1561,8 +1560,8 @@ static int hdlcdev_open(struct net_device *dev)
return rc;
}
- /* assert DTR and RTS, apply hardware settings */
- info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ /* assert RTS and DTR, apply hardware settings */
+ info->signals |= SerialSignal_RTS | SerialSignal_DTR;
program_hw(info);
/* enable network layer transmit */
@@ -1855,7 +1854,6 @@ static void hdlcdev_exit(struct slgt_info *info)
*/
static void rx_async(struct slgt_info *info)
{
- struct tty_struct *tty = info->port.tty;
struct mgsl_icount *icount = &info->icount;
unsigned int start, end;
unsigned char *p;
@@ -1894,10 +1892,8 @@ static void rx_async(struct slgt_info *info)
else if (status & BIT0)
stat = TTY_FRAME;
}
- if (tty) {
- tty_insert_flip_char(tty, ch, stat);
- chars++;
- }
+ tty_insert_flip_char(&info->port, ch, stat);
+ chars++;
}
if (i < count) {
@@ -1918,8 +1914,8 @@ static void rx_async(struct slgt_info *info)
break;
}
- if (tty && chars)
- tty_flip_buffer_push(tty);
+ if (chars)
+ tty_flip_buffer_push(&info->port);
}
/*
@@ -1961,8 +1957,6 @@ static void bh_handler(struct work_struct *work)
struct slgt_info *info = container_of(work, struct slgt_info, task);
int action;
- if (!info)
- return;
info->bh_running = true;
while((action = bh_action(info))) {
@@ -2183,7 +2177,7 @@ static void isr_serial(struct slgt_info *info)
if (info->port.tty) {
if (!(status & info->ignore_status_mask)) {
if (info->read_status_mask & MASK_BREAK) {
- tty_insert_flip_char(info->port.tty, 0, TTY_BREAK);
+ tty_insert_flip_char(&info->port, 0, TTY_BREAK);
if (info->port.flags & ASYNC_SAK)
do_SAK(info->port.tty);
}
@@ -2494,7 +2488,7 @@ static void shutdown(struct slgt_info *info)
slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) {
- info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
set_signals(info);
}
@@ -2554,12 +2548,12 @@ static void change_params(struct slgt_info *info)
cflag = info->port.tty->termios.c_cflag;
- /* if B0 rate (hangup) specified then negate DTR and RTS */
- /* otherwise assert DTR and RTS */
+ /* if B0 rate (hangup) specified then negate RTS and DTR */
+ /* otherwise assert RTS and DTR */
if (cflag & CBAUD)
- info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ info->signals |= SerialSignal_RTS | SerialSignal_DTR;
else
- info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
/* byte size and parity */
@@ -3262,9 +3256,9 @@ static void dtr_rts(struct tty_port *port, int on)
spin_lock_irqsave(&info->lock,flags);
if (on)
- info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ info->signals |= SerialSignal_RTS | SerialSignal_DTR;
else
- info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
@@ -3355,11 +3349,24 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
return retval;
}
+/*
+ * allocate buffers used for calling line discipline receive_buf
+ * directly in synchronous mode
+ * note: add 5 bytes to max frame size to allow appending
+ * 32-bit CRC and status byte when configured to do so
+ */
static int alloc_tmp_rbuf(struct slgt_info *info)
{
info->tmp_rbuf = kmalloc(info->max_frame_size + 5, GFP_KERNEL);
if (info->tmp_rbuf == NULL)
return -ENOMEM;
+ /* unused flag buffer to satisfy receive_buf calling interface */
+ info->flag_buf = kzalloc(info->max_frame_size + 5, GFP_KERNEL);
+ if (!info->flag_buf) {
+ kfree(info->tmp_rbuf);
+ info->tmp_rbuf = NULL;
+ return -ENOMEM;
+ }
return 0;
}
@@ -3367,6 +3374,8 @@ static void free_tmp_rbuf(struct slgt_info *info)
{
kfree(info->tmp_rbuf);
info->tmp_rbuf = NULL;
+ kfree(info->flag_buf);
+ info->flag_buf = NULL;
}
/*
@@ -4110,7 +4119,7 @@ static void reset_port(struct slgt_info *info)
tx_stop(info);
rx_stop(info);
- info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
set_signals(info);
slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
@@ -4537,8 +4546,8 @@ static void get_signals(struct slgt_info *info)
{
unsigned short status = rd_reg16(info, SSR);
- /* clear all serial signals except DTR and RTS */
- info->signals &= SerialSignal_DTR + SerialSignal_RTS;
+ /* clear all serial signals except RTS and DTR */
+ info->signals &= SerialSignal_RTS | SerialSignal_DTR;
if (status & BIT3)
info->signals |= SerialSignal_DSR;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-12 17:36:57 +0000