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path: root/drivers/tty/serial/m32r_sio.c
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Diffstat (limited to 'drivers/tty/serial/m32r_sio.c')
-rw-r--r--drivers/tty/serial/m32r_sio.c82
1 files changed, 23 insertions, 59 deletions
diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c
index bea5c215460..5702828fb62 100644
--- a/drivers/tty/serial/m32r_sio.c
+++ b/drivers/tty/serial/m32r_sio.c
@@ -32,20 +32,18 @@
#include <linux/module.h>
#include <linux/tty.h>
+#include <linux/tty_flip.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/serial.h>
-#include <linux/serialP.h>
#include <linux/delay.h>
#include <asm/m32r.h>
#include <asm/io.h>
#include <asm/irq.h>
-#define PORT_M32R_BASE PORT_M32R_SIO
-#define PORT_INDEX(x) (x - PORT_M32R_BASE + 1)
#define BAUD_RATE 115200
#include <linux/serial_core.h>
@@ -69,13 +67,6 @@
#define PASS_LIMIT 256
-/*
- * We default to IRQ0 for the "no irq" hack. Some
- * machine types want others as well - they're free
- * to redefine this in their header file.
- */
-#define is_real_interrupt(irq) ((irq) != 0)
-
#define BASE_BAUD 115200
/* Standard COM flags */
@@ -139,22 +130,6 @@ struct irq_info {
static struct irq_info irq_lists[NR_IRQS];
-/*
- * Here we define the default xmit fifo size used for each type of UART.
- */
-static const struct serial_uart_config uart_config[] = {
- [PORT_UNKNOWN] = {
- .name = "unknown",
- .dfl_xmit_fifo_size = 1,
- .flags = 0,
- },
- [PORT_INDEX(PORT_M32R_SIO)] = {
- .name = "M32RSIO",
- .dfl_xmit_fifo_size = 1,
- .flags = 0,
- },
-};
-
#ifdef CONFIG_SERIAL_M32R_PLDSIO
#define __sio_in(x) inw((unsigned long)(x))
@@ -291,9 +266,11 @@ static void m32r_sio_start_tx(struct uart_port *port)
if (!(up->ier & UART_IER_THRI)) {
up->ier |= UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
- serial_out(up, UART_TX, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
+ if (!uart_circ_empty(xmit)) {
+ serial_out(up, UART_TX, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ up->port.icount.tx++;
+ }
}
while((serial_in(up, UART_LSR) & UART_EMPTY) != UART_EMPTY);
#else
@@ -325,7 +302,7 @@ static void m32r_sio_enable_ms(struct uart_port *port)
static void receive_chars(struct uart_sio_port *up, int *status)
{
- struct tty_struct *tty = up->port.state->port.tty;
+ struct tty_port *port = &up->port.state->port;
unsigned char ch;
unsigned char flag;
int max_count = 256;
@@ -380,7 +357,7 @@ static void receive_chars(struct uart_sio_port *up, int *status)
if (uart_handle_sysrq_char(&up->port, ch))
goto ignore_char;
if ((*status & up->port.ignore_status_mask) == 0)
- tty_insert_flip_char(tty, ch, flag);
+ tty_insert_flip_char(port, ch, flag);
if (*status & UART_LSR_OE) {
/*
@@ -388,12 +365,15 @@ static void receive_chars(struct uart_sio_port *up, int *status)
* immediately, and doesn't affect the current
* character.
*/
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ tty_insert_flip_char(port, 0, TTY_OVERRUN);
}
ignore_char:
*status = serial_in(up, UART_LSR);
} while ((*status & UART_LSR_DR) && (max_count-- > 0));
- tty_flip_buffer_push(tty);
+
+ spin_unlock(&up->port.lock);
+ tty_flip_buffer_push(port);
+ spin_lock(&up->port.lock);
}
static void transmit_chars(struct uart_sio_port *up)
@@ -639,7 +619,7 @@ static int m32r_sio_startup(struct uart_port *port)
* hardware interrupt, we use a timer-based system. The original
* driver used to do this with IRQ0.
*/
- if (!is_real_interrupt(up->port.irq)) {
+ if (!up->port.irq) {
unsigned int timeout = up->port.timeout;
timeout = timeout > 6 ? (timeout / 2 - 2) : 1;
@@ -686,7 +666,7 @@ static void m32r_sio_shutdown(struct uart_port *port)
sio_init();
- if (!is_real_interrupt(up->port.irq))
+ if (!up->port.irq)
del_timer_sync(&up->timer);
else
serial_unlink_irq_chain(up);
@@ -759,7 +739,7 @@ static void m32r_sio_set_termios(struct uart_port *port,
up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
if (termios->c_iflag & INPCK)
up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (termios->c_iflag & (BRKINT | PARMRK))
+ if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
up->port.read_status_mask |= UART_LSR_BI;
/*
@@ -892,7 +872,7 @@ static int m32r_sio_request_port(struct uart_port *port)
* If we have a mapbase, then request that as well.
*/
if (ret == 0 && up->port.flags & UPF_IOREMAP) {
- int size = res->end - res->start + 1;
+ int size = resource_size(res);
up->port.membase = ioremap(up->port.mapbase, size);
if (!up->port.membase)
@@ -907,14 +887,14 @@ static int m32r_sio_request_port(struct uart_port *port)
return ret;
}
-static void m32r_sio_config_port(struct uart_port *port, int flags)
+static void m32r_sio_config_port(struct uart_port *port, int unused)
{
struct uart_sio_port *up = (struct uart_sio_port *)port;
+ unsigned long flags;
spin_lock_irqsave(&up->port.lock, flags);
- up->port.type = (PORT_M32R_SIO - PORT_M32R_BASE + 1);
- up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
+ up->port.fifosize = 1;
spin_unlock_irqrestore(&up->port.lock, flags);
}
@@ -922,23 +902,11 @@ static void m32r_sio_config_port(struct uart_port *port, int flags)
static int
m32r_sio_verify_port(struct uart_port *port, struct serial_struct *ser)
{
- if (ser->irq >= nr_irqs || ser->irq < 0 ||
- ser->baud_base < 9600 || ser->type < PORT_UNKNOWN ||
- ser->type >= ARRAY_SIZE(uart_config))
+ if (ser->irq >= nr_irqs || ser->irq < 0 || ser->baud_base < 9600)
return -EINVAL;
return 0;
}
-static const char *
-m32r_sio_type(struct uart_port *port)
-{
- int type = port->type;
-
- if (type >= ARRAY_SIZE(uart_config))
- type = 0;
- return uart_config[type].name;
-}
-
static struct uart_ops m32r_sio_pops = {
.tx_empty = m32r_sio_tx_empty,
.set_mctrl = m32r_sio_set_mctrl,
@@ -952,7 +920,6 @@ static struct uart_ops m32r_sio_pops = {
.shutdown = m32r_sio_shutdown,
.set_termios = m32r_sio_set_termios,
.pm = m32r_sio_pm,
- .type = m32r_sio_type,
.release_port = m32r_sio_release_port,
.request_port = m32r_sio_request_port,
.config_port = m32r_sio_config_port,
@@ -998,11 +965,8 @@ static void __init m32r_sio_register_ports(struct uart_driver *drv)
init_timer(&up->timer);
up->timer.function = m32r_sio_timeout;
- /*
- * ALPHA_KLUDGE_MCR needs to be killed.
- */
- up->mcr_mask = ~ALPHA_KLUDGE_MCR;
- up->mcr_force = ALPHA_KLUDGE_MCR;
+ up->mcr_mask = ~0;
+ up->mcr_force = 0;
uart_add_one_port(drv, &up->port);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 21:54:18 +0000