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path: root/drivers/mmc/card/sdio_uart.c
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Diffstat (limited to 'drivers/mmc/card/sdio_uart.c')
-rw-r--r--drivers/mmc/card/sdio_uart.c84
1 files changed, 32 insertions, 52 deletions
diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c
index 2c151e18c9e..f093cea0d06 100644
--- a/drivers/mmc/card/sdio_uart.c
+++ b/drivers/mmc/card/sdio_uart.c
@@ -66,8 +66,6 @@ struct uart_icount {
struct sdio_uart_port {
struct tty_port port;
- struct kref kref;
- struct tty_struct *tty;
unsigned int index;
struct sdio_func *func;
struct mutex func_lock;
@@ -93,7 +91,6 @@ static int sdio_uart_add_port(struct sdio_uart_port *port)
{
int index, ret = -EBUSY;
- kref_init(&port->kref);
mutex_init(&port->func_lock);
spin_lock_init(&port->write_lock);
if (kfifo_alloc(&port->xmit_fifo, FIFO_SIZE, GFP_KERNEL))
@@ -123,29 +120,20 @@ static struct sdio_uart_port *sdio_uart_port_get(unsigned index)
spin_lock(&sdio_uart_table_lock);
port = sdio_uart_table[index];
if (port)
- kref_get(&port->kref);
+ tty_port_get(&port->port);
spin_unlock(&sdio_uart_table_lock);
return port;
}
-static void sdio_uart_port_destroy(struct kref *kref)
-{
- struct sdio_uart_port *port =
- container_of(kref, struct sdio_uart_port, kref);
- kfifo_free(&port->xmit_fifo);
- kfree(port);
-}
-
static void sdio_uart_port_put(struct sdio_uart_port *port)
{
- kref_put(&port->kref, sdio_uart_port_destroy);
+ tty_port_put(&port->port);
}
static void sdio_uart_port_remove(struct sdio_uart_port *port)
{
struct sdio_func *func;
- struct tty_struct *tty;
BUG_ON(sdio_uart_table[port->index] != port);
@@ -166,12 +154,8 @@ static void sdio_uart_port_remove(struct sdio_uart_port *port)
sdio_claim_host(func);
port->func = NULL;
mutex_unlock(&port->func_lock);
- tty = tty_port_tty_get(&port->port);
/* tty_hangup is async so is this safe as is ?? */
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&port->port, false);
mutex_unlock(&port->port.mutex);
sdio_release_irq(func);
sdio_disable_func(func);
@@ -392,7 +376,6 @@ static void sdio_uart_stop_rx(struct sdio_uart_port *port)
static void sdio_uart_receive_chars(struct sdio_uart_port *port,
unsigned int *status)
{
- struct tty_struct *tty = tty_port_tty_get(&port->port);
unsigned int ch, flag;
int max_count = 256;
@@ -429,23 +412,19 @@ static void sdio_uart_receive_chars(struct sdio_uart_port *port,
}
if ((*status & port->ignore_status_mask & ~UART_LSR_OE) == 0)
- if (tty)
- tty_insert_flip_char(tty, ch, flag);
+ tty_insert_flip_char(&port->port, ch, flag);
/*
* Overrun is special. Since it's reported immediately,
* it doesn't affect the current character.
*/
if (*status & ~port->ignore_status_mask & UART_LSR_OE)
- if (tty)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
*status = sdio_in(port, UART_LSR);
} while ((*status & UART_LSR_DR) && (max_count-- > 0));
- if (tty) {
- tty_flip_buffer_push(tty);
- tty_kref_put(tty);
- }
+
+ tty_flip_buffer_push(&port->port);
}
static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
@@ -508,17 +487,13 @@ static void sdio_uart_check_modem_status(struct sdio_uart_port *port)
wake_up_interruptible(&port->port.open_wait);
else {
/* DCD drop - hang up if tty attached */
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&port->port, false);
}
}
if (status & UART_MSR_DCTS) {
port->icount.cts++;
tty = tty_port_tty_get(&port->port);
- if (tty && (tty->termios->c_cflag & CRTSCTS)) {
+ if (tty && (tty->termios.c_cflag & CRTSCTS)) {
int cts = (status & UART_MSR_CTS);
if (tty->hw_stopped) {
if (cts) {
@@ -671,12 +646,12 @@ static int sdio_uart_activate(struct tty_port *tport, struct tty_struct *tty)
port->ier = UART_IER_RLSI|UART_IER_RDI|UART_IER_RTOIE|UART_IER_UUE;
port->mctrl = TIOCM_OUT2;
- sdio_uart_change_speed(port, tty->termios, NULL);
+ sdio_uart_change_speed(port, &tty->termios, NULL);
- if (tty->termios->c_cflag & CBAUD)
+ if (tty->termios.c_cflag & CBAUD)
sdio_uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR);
- if (tty->termios->c_cflag & CRTSCTS)
+ if (tty->termios.c_cflag & CRTSCTS)
if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS))
tty->hw_stopped = 1;
@@ -737,6 +712,14 @@ static void sdio_uart_shutdown(struct tty_port *tport)
sdio_uart_release_func(port);
}
+static void sdio_uart_port_destroy(struct tty_port *tport)
+{
+ struct sdio_uart_port *port =
+ container_of(tport, struct sdio_uart_port, port);
+ kfifo_free(&port->xmit_fifo);
+ kfree(port);
+}
+
/**
* sdio_uart_install - install method
* @driver: the driver in use (sdio_uart in our case)
@@ -750,15 +733,12 @@ static int sdio_uart_install(struct tty_driver *driver, struct tty_struct *tty)
{
int idx = tty->index;
struct sdio_uart_port *port = sdio_uart_port_get(idx);
- int ret = tty_init_termios(tty);
+ int ret = tty_standard_install(driver, tty);
- if (ret == 0) {
- tty_driver_kref_get(driver);
- tty->count++;
+ if (ret == 0)
/* This is the ref sdio_uart_port get provided */
tty->driver_data = port;
- driver->ttys[idx] = tty;
- } else
+ else
sdio_uart_port_put(port);
return ret;
}
@@ -853,7 +833,7 @@ static void sdio_uart_throttle(struct tty_struct *tty)
{
struct sdio_uart_port *port = tty->driver_data;
- if (!I_IXOFF(tty) && !(tty->termios->c_cflag & CRTSCTS))
+ if (!I_IXOFF(tty) && !(tty->termios.c_cflag & CRTSCTS))
return;
if (sdio_uart_claim_func(port) != 0)
@@ -864,7 +844,7 @@ static void sdio_uart_throttle(struct tty_struct *tty)
sdio_uart_start_tx(port);
}
- if (tty->termios->c_cflag & CRTSCTS)
+ if (tty->termios.c_cflag & CRTSCTS)
sdio_uart_clear_mctrl(port, TIOCM_RTS);
sdio_uart_irq(port->func);
@@ -875,7 +855,7 @@ static void sdio_uart_unthrottle(struct tty_struct *tty)
{
struct sdio_uart_port *port = tty->driver_data;
- if (!I_IXOFF(tty) && !(tty->termios->c_cflag & CRTSCTS))
+ if (!I_IXOFF(tty) && !(tty->termios.c_cflag & CRTSCTS))
return;
if (sdio_uart_claim_func(port) != 0)
@@ -890,7 +870,7 @@ static void sdio_uart_unthrottle(struct tty_struct *tty)
}
}
- if (tty->termios->c_cflag & CRTSCTS)
+ if (tty->termios.c_cflag & CRTSCTS)
sdio_uart_set_mctrl(port, TIOCM_RTS);
sdio_uart_irq(port->func);
@@ -901,12 +881,12 @@ static void sdio_uart_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
struct sdio_uart_port *port = tty->driver_data;
- unsigned int cflag = tty->termios->c_cflag;
+ unsigned int cflag = tty->termios.c_cflag;
if (sdio_uart_claim_func(port) != 0)
return;
- sdio_uart_change_speed(port, tty->termios, old_termios);
+ sdio_uart_change_speed(port, &tty->termios, old_termios);
/* Handle transition to B0 status */
if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD))
@@ -1048,6 +1028,7 @@ static const struct tty_port_operations sdio_uart_port_ops = {
.carrier_raised = uart_carrier_raised,
.shutdown = sdio_uart_shutdown,
.activate = sdio_uart_activate,
+ .destruct = sdio_uart_port_destroy,
};
static const struct tty_operations sdio_uart_ops = {
@@ -1135,8 +1116,8 @@ static int sdio_uart_probe(struct sdio_func *func,
kfree(port);
} else {
struct device *dev;
- dev = tty_register_device(sdio_uart_tty_driver,
- port->index, &func->dev);
+ dev = tty_port_register_device(&port->port,
+ sdio_uart_tty_driver, port->index, &func->dev);
if (IS_ERR(dev)) {
sdio_uart_port_remove(port);
ret = PTR_ERR(dev);
@@ -1178,7 +1159,6 @@ static int __init sdio_uart_init(void)
if (!tty_drv)
return -ENOMEM;
- tty_drv->owner = THIS_MODULE;
tty_drv->driver_name = "sdio_uart";
tty_drv->name = "ttySDIO";
tty_drv->major = 0; /* dynamically allocated */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:05:09 +0000