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path: root/drivers/tty/serial/mpc52xx_uart.c
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Diffstat (limited to 'drivers/tty/serial/mpc52xx_uart.c')
-rw-r--r--drivers/tty/serial/mpc52xx_uart.c81
1 files changed, 39 insertions, 42 deletions
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index af1700445251..73362d4bc45d 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -38,6 +38,8 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
@@ -83,11 +85,11 @@ static irqreturn_t mpc5xxx_uart_process_int(struct uart_port *port);
struct psc_ops {
void (*fifo_init)(struct uart_port *port);
- int (*raw_rx_rdy)(struct uart_port *port);
- int (*raw_tx_rdy)(struct uart_port *port);
- int (*rx_rdy)(struct uart_port *port);
- int (*tx_rdy)(struct uart_port *port);
- int (*tx_empty)(struct uart_port *port);
+ unsigned int (*raw_rx_rdy)(struct uart_port *port);
+ unsigned int (*raw_tx_rdy)(struct uart_port *port);
+ unsigned int (*rx_rdy)(struct uart_port *port);
+ unsigned int (*tx_rdy)(struct uart_port *port);
+ unsigned int (*tx_empty)(struct uart_port *port);
void (*stop_rx)(struct uart_port *port);
void (*start_tx)(struct uart_port *port);
void (*stop_tx)(struct uart_port *port);
@@ -99,7 +101,7 @@ struct psc_ops {
void (*cw_restore_ints)(struct uart_port *port);
unsigned int (*set_baudrate)(struct uart_port *port,
struct ktermios *new,
- struct ktermios *old);
+ const struct ktermios *old);
int (*clock_alloc)(struct uart_port *port);
void (*clock_relse)(struct uart_port *port);
int (*clock)(struct uart_port *port, int enable);
@@ -203,34 +205,34 @@ static void mpc52xx_psc_fifo_init(struct uart_port *port)
out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
}
-static int mpc52xx_psc_raw_rx_rdy(struct uart_port *port)
+static unsigned int mpc52xx_psc_raw_rx_rdy(struct uart_port *port)
{
return in_be16(&PSC(port)->mpc52xx_psc_status)
& MPC52xx_PSC_SR_RXRDY;
}
-static int mpc52xx_psc_raw_tx_rdy(struct uart_port *port)
+static unsigned int mpc52xx_psc_raw_tx_rdy(struct uart_port *port)
{
return in_be16(&PSC(port)->mpc52xx_psc_status)
& MPC52xx_PSC_SR_TXRDY;
}
-static int mpc52xx_psc_rx_rdy(struct uart_port *port)
+static unsigned int mpc52xx_psc_rx_rdy(struct uart_port *port)
{
return in_be16(&PSC(port)->mpc52xx_psc_isr)
& port->read_status_mask
& MPC52xx_PSC_IMR_RXRDY;
}
-static int mpc52xx_psc_tx_rdy(struct uart_port *port)
+static unsigned int mpc52xx_psc_tx_rdy(struct uart_port *port)
{
return in_be16(&PSC(port)->mpc52xx_psc_isr)
& port->read_status_mask
& MPC52xx_PSC_IMR_TXRDY;
}
-static int mpc52xx_psc_tx_empty(struct uart_port *port)
+static unsigned int mpc52xx_psc_tx_empty(struct uart_port *port)
{
u16 sts = in_be16(&PSC(port)->mpc52xx_psc_status);
@@ -285,7 +287,7 @@ static void mpc52xx_psc_cw_restore_ints(struct uart_port *port)
static unsigned int mpc5200_psc_set_baudrate(struct uart_port *port,
struct ktermios *new,
- struct ktermios *old)
+ const struct ktermios *old)
{
unsigned int baud;
unsigned int divisor;
@@ -303,7 +305,7 @@ static unsigned int mpc5200_psc_set_baudrate(struct uart_port *port,
static unsigned int mpc5200b_psc_set_baudrate(struct uart_port *port,
struct ktermios *new,
- struct ktermios *old)
+ const struct ktermios *old)
{
unsigned int baud;
unsigned int divisor;
@@ -436,31 +438,31 @@ static void mpc512x_psc_fifo_init(struct uart_port *port)
out_be32(&FIFO_512x(port)->rximr, MPC512x_PSC_FIFO_ALARM);
}
-static int mpc512x_psc_raw_rx_rdy(struct uart_port *port)
+static unsigned int mpc512x_psc_raw_rx_rdy(struct uart_port *port)
{
return !(in_be32(&FIFO_512x(port)->rxsr) & MPC512x_PSC_FIFO_EMPTY);
}
-static int mpc512x_psc_raw_tx_rdy(struct uart_port *port)
+static unsigned int mpc512x_psc_raw_tx_rdy(struct uart_port *port)
{
return !(in_be32(&FIFO_512x(port)->txsr) & MPC512x_PSC_FIFO_FULL);
}
-static int mpc512x_psc_rx_rdy(struct uart_port *port)
+static unsigned int mpc512x_psc_rx_rdy(struct uart_port *port)
{
return in_be32(&FIFO_512x(port)->rxsr)
& in_be32(&FIFO_512x(port)->rximr)
& MPC512x_PSC_FIFO_ALARM;
}
-static int mpc512x_psc_tx_rdy(struct uart_port *port)
+static unsigned int mpc512x_psc_tx_rdy(struct uart_port *port)
{
return in_be32(&FIFO_512x(port)->txsr)
& in_be32(&FIFO_512x(port)->tximr)
& MPC512x_PSC_FIFO_ALARM;
}
-static int mpc512x_psc_tx_empty(struct uart_port *port)
+static unsigned int mpc512x_psc_tx_empty(struct uart_port *port)
{
return in_be32(&FIFO_512x(port)->txsr)
& MPC512x_PSC_FIFO_EMPTY;
@@ -531,7 +533,7 @@ static void mpc512x_psc_cw_restore_ints(struct uart_port *port)
static unsigned int mpc512x_psc_set_baudrate(struct uart_port *port,
struct ktermios *new,
- struct ktermios *old)
+ const struct ktermios *old)
{
unsigned int baud;
unsigned int divisor;
@@ -754,9 +756,6 @@ static void mpc512x_psc_get_irq(struct uart_port *port, struct device_node *np)
port->irqflags = IRQF_SHARED;
port->irq = psc_fifoc_irq;
}
-#endif
-
-#ifdef CONFIG_PPC_MPC512x
#define PSC_5125(port) ((struct mpc5125_psc __iomem *)((port)->membase))
#define FIFO_5125(port) ((struct mpc512x_psc_fifo __iomem *)(PSC_5125(port)+1))
@@ -780,29 +779,29 @@ static void mpc5125_psc_fifo_init(struct uart_port *port)
out_be32(&FIFO_5125(port)->rximr, MPC512x_PSC_FIFO_ALARM);
}
-static int mpc5125_psc_raw_rx_rdy(struct uart_port *port)
+static unsigned int mpc5125_psc_raw_rx_rdy(struct uart_port *port)
{
return !(in_be32(&FIFO_5125(port)->rxsr) & MPC512x_PSC_FIFO_EMPTY);
}
-static int mpc5125_psc_raw_tx_rdy(struct uart_port *port)
+static unsigned int mpc5125_psc_raw_tx_rdy(struct uart_port *port)
{
return !(in_be32(&FIFO_5125(port)->txsr) & MPC512x_PSC_FIFO_FULL);
}
-static int mpc5125_psc_rx_rdy(struct uart_port *port)
+static unsigned int mpc5125_psc_rx_rdy(struct uart_port *port)
{
return in_be32(&FIFO_5125(port)->rxsr) &
in_be32(&FIFO_5125(port)->rximr) & MPC512x_PSC_FIFO_ALARM;
}
-static int mpc5125_psc_tx_rdy(struct uart_port *port)
+static unsigned int mpc5125_psc_tx_rdy(struct uart_port *port)
{
return in_be32(&FIFO_5125(port)->txsr) &
in_be32(&FIFO_5125(port)->tximr) & MPC512x_PSC_FIFO_ALARM;
}
-static int mpc5125_psc_tx_empty(struct uart_port *port)
+static unsigned int mpc5125_psc_tx_empty(struct uart_port *port)
{
return in_be32(&FIFO_5125(port)->txsr) & MPC512x_PSC_FIFO_EMPTY;
}
@@ -881,7 +880,7 @@ static inline void mpc5125_set_divisor(struct mpc5125_psc __iomem *psc,
static unsigned int mpc5125_psc_set_baudrate(struct uart_port *port,
struct ktermios *new,
- struct ktermios *old)
+ const struct ktermios *old)
{
unsigned int baud;
unsigned int divisor;
@@ -1168,7 +1167,7 @@ mpc52xx_uart_shutdown(struct uart_port *port)
static void
mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
- struct ktermios *old)
+ const struct ktermios *old)
{
unsigned long flags;
unsigned char mr1, mr2;
@@ -1365,7 +1364,7 @@ static const struct uart_ops mpc52xx_uart_ops = {
/* Interrupt handling */
/* ======================================================================== */
-static inline int
+static inline bool
mpc52xx_uart_int_rx_chars(struct uart_port *port)
{
struct tty_port *tport = &port->state->port;
@@ -1421,14 +1420,12 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
}
}
- spin_unlock(&port->lock);
tty_flip_buffer_push(tport);
- spin_lock(&port->lock);
return psc_ops->raw_rx_rdy(port);
}
-static inline int
+static inline bool
mpc52xx_uart_int_tx_chars(struct uart_port *port)
{
struct circ_buf *xmit = &port->state->xmit;
@@ -1438,13 +1435,13 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
psc_ops->write_char(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
- return 1;
+ return true;
}
/* Nothing to do ? */
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
mpc52xx_uart_stop_tx(port);
- return 0;
+ return false;
}
/* Send chars */
@@ -1463,23 +1460,23 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
/* Maybe we're done after all */
if (uart_circ_empty(xmit)) {
mpc52xx_uart_stop_tx(port);
- return 0;
+ return false;
}
- return 1;
+ return true;
}
static irqreturn_t
mpc5xxx_uart_process_int(struct uart_port *port)
{
unsigned long pass = ISR_PASS_LIMIT;
- unsigned int keepgoing;
+ bool keepgoing;
u8 status;
/* While we have stuff to do, we continue */
do {
/* If we don't find anything to do, we stop */
- keepgoing = 0;
+ keepgoing = false;
psc_ops->rx_clr_irq(port);
if (psc_ops->rx_rdy(port))
@@ -1498,7 +1495,7 @@ mpc5xxx_uart_process_int(struct uart_port *port)
/* Limit number of iteration */
if (!(--pass))
- keepgoing = 0;
+ keepgoing = false;
} while (keepgoing);
@@ -1633,7 +1630,7 @@ mpc52xx_console_setup(struct console *co, char *options)
return ret;
}
- uartclk = mpc5xxx_get_bus_frequency(np);
+ uartclk = mpc5xxx_fwnode_get_bus_frequency(of_fwnode_handle(np));
if (uartclk == 0) {
pr_debug("Could not find uart clock frequency!\n");
return -EINVAL;
@@ -1750,7 +1747,7 @@ static int mpc52xx_uart_of_probe(struct platform_device *op)
/* set the uart clock to the input clock of the psc, the different
* prescalers are taken into account in the set_baudrate() methods
* of the respective chip */
- uartclk = mpc5xxx_get_bus_frequency(op->dev.of_node);
+ uartclk = mpc5xxx_get_bus_frequency(&op->dev);
if (uartclk == 0) {
dev_dbg(&op->dev, "Could not find uart clock frequency!\n");
return -EINVAL;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.