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path: root/drivers/tty/serial/sunzilog.c
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Diffstat (limited to 'drivers/tty/serial/sunzilog.c')
-rw-r--r--drivers/tty/serial/sunzilog.c81
1 files changed, 39 insertions, 42 deletions
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index ccb809216e94..0551c24c06f5 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -33,11 +33,11 @@
#include <linux/serio.h>
#endif
#include <linux/init.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/irq.h>
-#include <asm/prom.h>
#include <asm/setup.h>
#include <linux/serial_core.h>
@@ -453,7 +453,8 @@ static void sunzilog_status_handle(struct uart_sunzilog_port *up,
static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,
struct zilog_channel __iomem *channel)
{
- struct circ_buf *xmit;
+ struct tty_port *tport;
+ unsigned char ch;
if (ZS_IS_CONS(up)) {
unsigned char status = readb(&channel->control);
@@ -496,21 +497,20 @@ static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,
if (up->port.state == NULL)
goto ack_tx_int;
- xmit = &up->port.state->xmit;
- if (uart_circ_empty(xmit))
- goto ack_tx_int;
+ tport = &up->port.state->port;
if (uart_tx_stopped(&up->port))
goto ack_tx_int;
+ if (!uart_fifo_get(&up->port, &ch))
+ goto ack_tx_int;
+
up->flags |= SUNZILOG_FLAG_TX_ACTIVE;
- writeb(xmit->buf[xmit->tail], &channel->data);
+ writeb(ch, &channel->data);
ZSDELAY();
ZS_WSYNC(channel);
- uart_xmit_advance(&up->port, 1);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
uart_write_wakeup(&up->port);
return;
@@ -531,7 +531,7 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id)
struct tty_port *port;
unsigned char r3;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
r3 = read_zsreg(channel, R3);
/* Channel A */
@@ -548,7 +548,7 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id)
if (r3 & CHATxIP)
sunzilog_transmit_chars(up, channel);
}
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
if (port)
tty_flip_buffer_push(port);
@@ -557,7 +557,7 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id)
up = up->next;
channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
port = NULL;
if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) {
writeb(RES_H_IUS, &channel->control);
@@ -571,7 +571,7 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id)
if (r3 & CHBTxIP)
sunzilog_transmit_chars(up, channel);
}
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
if (port)
tty_flip_buffer_push(port);
@@ -604,11 +604,11 @@ static unsigned int sunzilog_tx_empty(struct uart_port *port)
unsigned char status;
unsigned int ret;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
status = sunzilog_read_channel_status(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (status & Tx_BUF_EMP)
ret = TIOCSER_TEMT;
@@ -700,17 +700,16 @@ static void sunzilog_start_tx(struct uart_port *port)
port->icount.tx++;
port->x_char = 0;
} else {
- struct circ_buf *xmit = &port->state->xmit;
+ struct tty_port *tport = &port->state->port;
+ unsigned char ch;
- if (uart_circ_empty(xmit))
+ if (!uart_fifo_get(&up->port, &ch))
return;
- writeb(xmit->buf[xmit->tail], &channel->data);
+ writeb(ch, &channel->data);
ZSDELAY();
ZS_WSYNC(channel);
- uart_xmit_advance(port, 1);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
uart_write_wakeup(&up->port);
}
}
@@ -764,7 +763,7 @@ static void sunzilog_break_ctl(struct uart_port *port, int break_state)
else
clear_bits |= SND_BRK;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
new_reg = (up->curregs[R5] | set_bits) & ~clear_bits;
if (new_reg != up->curregs[R5]) {
@@ -774,7 +773,7 @@ static void sunzilog_break_ctl(struct uart_port *port, int break_state)
write_zsreg(channel, R5, up->curregs[R5]);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void __sunzilog_startup(struct uart_sunzilog_port *up)
@@ -800,9 +799,9 @@ static int sunzilog_startup(struct uart_port *port)
if (ZS_IS_CONS(up))
return 0;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
__sunzilog_startup(up);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -840,7 +839,7 @@ static void sunzilog_shutdown(struct uart_port *port)
if (ZS_IS_CONS(up))
return;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
channel = ZILOG_CHANNEL_FROM_PORT(port);
@@ -853,7 +852,7 @@ static void sunzilog_shutdown(struct uart_port *port)
up->curregs[R5] &= ~SND_BRK;
sunzilog_maybe_update_regs(up, channel);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/* Shared by TTY driver and serial console setup. The port lock is held
@@ -945,7 +944,7 @@ sunzilog_set_termios(struct uart_port *port, struct ktermios *termios,
baud = uart_get_baud_rate(port, termios, old, 1200, 76800);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
@@ -962,7 +961,7 @@ sunzilog_set_termios(struct uart_port *port, struct ktermios *termios,
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static const char *sunzilog_type(struct uart_port *port)
@@ -1201,15 +1200,15 @@ sunzilog_console_write(struct console *con, const char *s, unsigned int count)
int locked = 1;
if (up->port.sysrq || oops_in_progress)
- locked = spin_trylock_irqsave(&up->port.lock, flags);
+ locked = uart_port_trylock_irqsave(&up->port, &flags);
else
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
uart_console_write(&up->port, s, count, sunzilog_putchar);
udelay(2);
if (locked)
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static int __init sunzilog_console_setup(struct console *con, char *options)
@@ -1244,7 +1243,7 @@ static int __init sunzilog_console_setup(struct console *con, char *options)
brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->curregs[R15] |= BRKIE;
sunzilog_convert_to_zs(up, con->cflag, 0, brg);
@@ -1252,7 +1251,7 @@ static int __init sunzilog_console_setup(struct console *con, char *options)
sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS);
__sunzilog_startup(up);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return 0;
}
@@ -1333,7 +1332,7 @@ static void sunzilog_init_hw(struct uart_sunzilog_port *up)
channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
if (ZS_IS_CHANNEL_A(up)) {
write_zsreg(channel, R9, FHWRES);
ZSDELAY_LONG();
@@ -1383,7 +1382,7 @@ static void sunzilog_init_hw(struct uart_sunzilog_port *up)
write_zsreg(channel, R9, up->curregs[R9]);
}
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
#ifdef CONFIG_SERIO
if (up->flags & (SUNZILOG_FLAG_CONS_KEYB |
@@ -1403,7 +1402,7 @@ static int zs_probe(struct platform_device *op)
int keyboard_mouse = 0;
int err;
- if (of_find_property(op->dev.of_node, "keyboard", NULL))
+ if (of_property_present(op->dev.of_node, "keyboard"))
keyboard_mouse = 1;
/* uarts must come before keyboards/mice */
@@ -1513,7 +1512,7 @@ static void zs_remove_one(struct uart_sunzilog_port *up)
uart_remove_one_port(&sunzilog_reg, &up->port);
}
-static int zs_remove(struct platform_device *op)
+static void zs_remove(struct platform_device *op)
{
struct uart_sunzilog_port *up = platform_get_drvdata(op);
struct zilog_layout __iomem *regs;
@@ -1523,8 +1522,6 @@ static int zs_remove(struct platform_device *op)
regs = sunzilog_chip_regs[up[0].port.line / 2];
of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout));
-
- return 0;
}
static const struct of_device_id zs_match[] = {
@@ -1553,7 +1550,7 @@ static int __init sunzilog_init(void)
for_each_node_by_name(dp, "zs") {
num_sunzilog++;
- if (of_find_property(dp, "keyboard", NULL))
+ if (of_property_present(dp, "keyboard"))
num_keybms++;
}
generated by cgit (git 2.34.1) at 2025-12-21 19:11:12 +0000