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-rw-r--r--drivers/tty/serial/8250/8250_exar.c5
-rw-r--r--drivers/tty/serial/8250/8250_port.c6
-rw-r--r--drivers/tty/serial/fsl_lpuart.c7
-rw-r--r--drivers/tty/serial/imx.c22
-rw-r--r--drivers/tty/serial/max310x.c9
-rw-r--r--drivers/tty/serial/qcom_geni_serial.c10
-rw-r--r--drivers/tty/serial/samsung_tty.c5
-rw-r--r--drivers/tty/serial/serial_core.c12
-rw-r--r--drivers/tty/serial/serial_port.c25
9 files changed, 74 insertions, 27 deletions
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 23366f868a..dab94835b6 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -753,6 +753,7 @@ static void exar_pci_remove(struct pci_dev *pcidev)
for (i = 0; i < priv->nr; i++)
serial8250_unregister_port(priv->line[i]);
+ /* Ensure that every init quirk is properly torn down */
if (priv->board->exit)
priv->board->exit(pcidev);
}
@@ -767,10 +768,6 @@ static int __maybe_unused exar_suspend(struct device *dev)
if (priv->line[i] >= 0)
serial8250_suspend_port(priv->line[i]);
- /* Ensure that every init quirk is properly torn down */
- if (priv->board->exit)
- priv->board->exit(pcidev);
-
return 0;
}
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 8ca061d3bb..1d65055dde 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1329,9 +1329,6 @@ static void autoconfig_irq(struct uart_8250_port *up)
inb_p(ICP);
}
- if (uart_console(port))
- console_lock();
-
/* forget possible initially masked and pending IRQ */
probe_irq_off(probe_irq_on());
save_mcr = serial8250_in_MCR(up);
@@ -1371,9 +1368,6 @@ static void autoconfig_irq(struct uart_8250_port *up)
if (port->flags & UPF_FOURPORT)
outb_p(save_ICP, ICP);
- if (uart_console(port))
- console_unlock();
-
port->irq = (irq > 0) ? irq : 0;
}
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 6d0cfb2e86..71d0cbd748 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2345,9 +2345,12 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
lpuart32_write(&sport->port, bd, UARTBAUD);
lpuart32_serial_setbrg(sport, baud);
- lpuart32_write(&sport->port, modem, UARTMODIR);
- lpuart32_write(&sport->port, ctrl, UARTCTRL);
+ /* disable CTS before enabling UARTCTRL_TE to avoid pending idle preamble */
+ lpuart32_write(&sport->port, modem & ~UARTMODIR_TXCTSE, UARTMODIR);
/* restore control register */
+ lpuart32_write(&sport->port, ctrl, UARTCTRL);
+ /* re-enable the CTS if needed */
+ lpuart32_write(&sport->port, modem, UARTMODIR);
if ((ctrl & (UARTCTRL_PE | UARTCTRL_M)) == UARTCTRL_PE)
sport->is_cs7 = true;
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 81557a58f8..5545bf4a79 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -462,8 +462,7 @@ static void imx_uart_stop_tx(struct uart_port *port)
}
}
-/* called with port.lock taken and irqs off */
-static void imx_uart_stop_rx(struct uart_port *port)
+static void imx_uart_stop_rx_with_loopback_ctrl(struct uart_port *port, bool loopback)
{
struct imx_port *sport = (struct imx_port *)port;
u32 ucr1, ucr2, ucr4, uts;
@@ -485,7 +484,7 @@ static void imx_uart_stop_rx(struct uart_port *port)
/* See SER_RS485_ENABLED/UTS_LOOP comment in imx_uart_probe() */
if (port->rs485.flags & SER_RS485_ENABLED &&
port->rs485.flags & SER_RS485_RTS_ON_SEND &&
- sport->have_rtscts && !sport->have_rtsgpio) {
+ sport->have_rtscts && !sport->have_rtsgpio && loopback) {
uts = imx_uart_readl(sport, imx_uart_uts_reg(sport));
uts |= UTS_LOOP;
imx_uart_writel(sport, uts, imx_uart_uts_reg(sport));
@@ -498,6 +497,16 @@ static void imx_uart_stop_rx(struct uart_port *port)
}
/* called with port.lock taken and irqs off */
+static void imx_uart_stop_rx(struct uart_port *port)
+{
+ /*
+ * Stop RX and enable loopback in order to make sure RS485 bus
+ * is not blocked. Se comment in imx_uart_probe().
+ */
+ imx_uart_stop_rx_with_loopback_ctrl(port, true);
+}
+
+/* called with port.lock taken and irqs off */
static void imx_uart_enable_ms(struct uart_port *port)
{
struct imx_port *sport = (struct imx_port *)port;
@@ -682,9 +691,14 @@ static void imx_uart_start_tx(struct uart_port *port)
imx_uart_rts_inactive(sport, &ucr2);
imx_uart_writel(sport, ucr2, UCR2);
+ /*
+ * Since we are about to transmit we can not stop RX
+ * with loopback enabled because that will make our
+ * transmitted data being just looped to RX.
+ */
if (!(port->rs485.flags & SER_RS485_RX_DURING_TX) &&
!port->rs485_rx_during_tx_gpio)
- imx_uart_stop_rx(port);
+ imx_uart_stop_rx_with_loopback_ctrl(port, false);
sport->tx_state = WAIT_AFTER_RTS;
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 07f7b48bad..1a4bb55652 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1461,7 +1461,7 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
if (!ret)
return 0;
- dev_err(dev, "Unable to reguest IRQ %i\n", irq);
+ dev_err(dev, "Unable to request IRQ %i\n", irq);
out_uart:
for (i = 0; i < devtype->nr; i++) {
@@ -1635,13 +1635,16 @@ static unsigned short max310x_i2c_slave_addr(unsigned short addr,
static int max310x_i2c_probe(struct i2c_client *client)
{
- const struct max310x_devtype *devtype =
- device_get_match_data(&client->dev);
+ const struct max310x_devtype *devtype;
struct i2c_client *port_client;
struct regmap *regmaps[4];
unsigned int i;
u8 port_addr;
+ devtype = device_get_match_data(&client->dev);
+ if (!devtype)
+ return dev_err_probe(&client->dev, -ENODEV, "Failed to match device\n");
+
if (client->addr < devtype->slave_addr.min ||
client->addr > devtype->slave_addr.max)
return dev_err_probe(&client->dev, -EINVAL,
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 7e78f97e8f..5499096440 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -851,19 +851,21 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport)
}
static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport,
- unsigned int remaining)
+ unsigned int chunk)
{
struct qcom_geni_serial_port *port = to_dev_port(uport);
struct circ_buf *xmit = &uport->state->xmit;
- unsigned int tx_bytes;
+ unsigned int tx_bytes, c, remaining = chunk;
u8 buf[BYTES_PER_FIFO_WORD];
while (remaining) {
memset(buf, 0, sizeof(buf));
tx_bytes = min(remaining, BYTES_PER_FIFO_WORD);
- memcpy(buf, &xmit->buf[xmit->tail], tx_bytes);
- uart_xmit_advance(uport, tx_bytes);
+ for (c = 0; c < tx_bytes ; c++) {
+ buf[c] = xmit->buf[xmit->tail];
+ uart_xmit_advance(uport, 1);
+ }
iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1);
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 3bd552841c..06d140c9f5 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -987,11 +987,10 @@ static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port)
if ((ufstat & info->tx_fifomask) != 0 ||
(ufstat & info->tx_fifofull))
return 0;
-
- return 1;
+ return TIOCSER_TEMT;
}
- return s3c24xx_serial_txempty_nofifo(port);
+ return s3c24xx_serial_txempty_nofifo(port) ? TIOCSER_TEMT : 0;
}
/* no modem control lines */
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 39fa9ae509..e383d9a10a 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2603,7 +2603,12 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state,
port->type = PORT_UNKNOWN;
flags |= UART_CONFIG_TYPE;
}
+ /* Synchronize with possible boot console. */
+ if (uart_console(port))
+ console_lock();
port->ops->config_port(port, flags);
+ if (uart_console(port))
+ console_unlock();
}
if (port->type != PORT_UNKNOWN) {
@@ -2611,6 +2616,10 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state,
uart_report_port(drv, port);
+ /* Synchronize with possible boot console. */
+ if (uart_console(port))
+ console_lock();
+
/* Power up port for set_mctrl() */
uart_change_pm(state, UART_PM_STATE_ON);
@@ -2627,6 +2636,9 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state,
uart_rs485_config(port);
+ if (uart_console(port))
+ console_unlock();
+
/*
* If this driver supports console, and it hasn't been
* successfully registered yet, try to re-register it.
diff --git a/drivers/tty/serial/serial_port.c b/drivers/tty/serial/serial_port.c
index 88975a4df3..72b6f4f326 100644
--- a/drivers/tty/serial/serial_port.c
+++ b/drivers/tty/serial/serial_port.c
@@ -46,8 +46,31 @@ out:
return 0;
}
+static int serial_port_runtime_suspend(struct device *dev)
+{
+ struct serial_port_device *port_dev = to_serial_base_port_device(dev);
+ struct uart_port *port = port_dev->port;
+ unsigned long flags;
+ bool busy;
+
+ if (port->flags & UPF_DEAD)
+ return 0;
+
+ uart_port_lock_irqsave(port, &flags);
+ busy = __serial_port_busy(port);
+ if (busy)
+ port->ops->start_tx(port);
+ uart_port_unlock_irqrestore(port, flags);
+
+ if (busy)
+ pm_runtime_mark_last_busy(dev);
+
+ return busy ? -EBUSY : 0;
+}
+
static DEFINE_RUNTIME_DEV_PM_OPS(serial_port_pm,
- NULL, serial_port_runtime_resume, NULL);
+ serial_port_runtime_suspend,
+ serial_port_runtime_resume, NULL);
static int serial_port_probe(struct device *dev)
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 09:10:21 +0000