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path: root/drivers/tty/serial/8250/8250.h
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Diffstat (limited to 'drivers/tty/serial/8250/8250.h')
-rw-r--r--drivers/tty/serial/8250/8250.h81
1 files changed, 61 insertions, 20 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 287153d32536..8caecfc85d93 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -9,7 +9,7 @@
#include <linux/bits.h>
#include <linux/serial_8250.h>
-#include <linux/serial_reg.h>
+#include <linux/serial_core.h>
#include <linux/dmaengine.h>
#include "../serial_mctrl_gpio.h"
@@ -91,15 +91,12 @@ struct serial8250_config {
#define UART_BUG_TXEN BIT(1) /* UART has buggy TX IIR status */
#define UART_BUG_NOMSR BIT(2) /* UART has buggy MSR status bits (Au1x00) */
#define UART_BUG_THRE BIT(3) /* UART has buggy THRE reassertion */
-#define UART_BUG_PARITY BIT(4) /* UART mishandles parity if FIFO enabled */
#define UART_BUG_TXRACE BIT(5) /* UART Tx fails to set remote DR */
+/* Module parameters */
+#define UART_NR CONFIG_SERIAL_8250_NR_UARTS
-#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
-#define SERIAL8250_SHARE_IRQS 1
-#else
-#define SERIAL8250_SHARE_IRQS 0
-#endif
+extern unsigned int nr_uarts;
#define SERIAL8250_PORT_FLAGS(_base, _irq, _flags) \
{ \
@@ -112,6 +109,19 @@ struct serial8250_config {
#define SERIAL8250_PORT(_base, _irq) SERIAL8250_PORT_FLAGS(_base, _irq, 0)
+extern struct uart_driver serial8250_reg;
+void serial8250_register_ports(struct uart_driver *drv, struct device *dev);
+
+/* Legacy ISA bus related APIs */
+typedef void (*serial8250_isa_config_fn)(int, struct uart_port *, u32 *);
+extern serial8250_isa_config_fn serial8250_isa_config;
+
+void serial8250_isa_init_ports(void);
+
+extern struct platform_device *serial8250_isa_devs;
+
+extern const struct uart_ops *univ8250_port_base_ops;
+extern struct uart_ops univ8250_port_ops;
static inline int serial_in(struct uart_8250_port *up, int offset)
{
@@ -167,18 +177,26 @@ static unsigned int __maybe_unused serial_icr_read(struct uart_8250_port *up,
void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p);
-static inline int serial_dl_read(struct uart_8250_port *up)
+void serial8250_rpm_get(struct uart_8250_port *p);
+void serial8250_rpm_put(struct uart_8250_port *p);
+DEFINE_GUARD(serial8250_rpm, struct uart_8250_port *,
+ serial8250_rpm_get(_T), serial8250_rpm_put(_T));
+
+static inline u32 serial_dl_read(struct uart_8250_port *up)
{
return up->dl_read(up);
}
-static inline void serial_dl_write(struct uart_8250_port *up, int value)
+static inline void serial_dl_write(struct uart_8250_port *up, u32 value)
{
up->dl_write(up, value);
}
static inline bool serial8250_set_THRI(struct uart_8250_port *up)
{
+ /* Port locked to synchronize UART_IER access against the console. */
+ lockdep_assert_held_once(&up->port.lock);
+
if (up->ier & UART_IER_THRI)
return false;
up->ier |= UART_IER_THRI;
@@ -188,6 +206,9 @@ static inline bool serial8250_set_THRI(struct uart_8250_port *up)
static inline bool serial8250_clear_THRI(struct uart_8250_port *up)
{
+ /* Port locked to synchronize UART_IER access against the console. */
+ lockdep_assert_held_once(&up->port.lock);
+
if (!(up->ier & UART_IER_THRI))
return false;
up->ier &= ~UART_IER_THRI;
@@ -195,18 +216,13 @@ static inline bool serial8250_clear_THRI(struct uart_8250_port *up)
return true;
}
+struct uart_8250_port *serial8250_setup_port(int index);
struct uart_8250_port *serial8250_get_port(int line);
-void serial8250_rpm_get(struct uart_8250_port *p);
-void serial8250_rpm_put(struct uart_8250_port *p);
-
-void serial8250_rpm_get_tx(struct uart_8250_port *p);
-void serial8250_rpm_put_tx(struct uart_8250_port *p);
-
int serial8250_em485_config(struct uart_port *port, struct ktermios *termios,
struct serial_rs485 *rs485);
-void serial8250_em485_start_tx(struct uart_8250_port *p);
-void serial8250_em485_stop_tx(struct uart_8250_port *p);
+void serial8250_em485_start_tx(struct uart_8250_port *p, bool toggle_ier);
+void serial8250_em485_stop_tx(struct uart_8250_port *p, bool toggle_ier);
void serial8250_em485_destroy(struct uart_8250_port *p);
extern struct serial_rs485 serial8250_em485_supported;
@@ -288,9 +304,6 @@ static inline int serial8250_in_MCR(struct uart_8250_port *up)
return mctrl;
}
-bool alpha_jensen(void);
-void alpha_jensen_set_mctrl(struct uart_port *port, unsigned int mctrl);
-
#ifdef CONFIG_SERIAL_8250_PNP
int serial8250_pnp_init(void);
void serial8250_pnp_exit(void);
@@ -299,6 +312,20 @@ static inline int serial8250_pnp_init(void) { return 0; }
static inline void serial8250_pnp_exit(void) { }
#endif
+#ifdef CONFIG_SERIAL_8250_RSA
+void univ8250_rsa_support(struct uart_ops *ops, const struct uart_ops *core_ops);
+void rsa_enable(struct uart_8250_port *up);
+void rsa_disable(struct uart_8250_port *up);
+void rsa_autoconfig(struct uart_8250_port *up);
+void rsa_reset(struct uart_8250_port *up);
+#else
+static inline void univ8250_rsa_support(struct uart_ops *ops, const struct uart_ops *core_ops) { }
+static inline void rsa_enable(struct uart_8250_port *up) {}
+static inline void rsa_disable(struct uart_8250_port *up) {}
+static inline void rsa_autoconfig(struct uart_8250_port *up) {}
+static inline void rsa_reset(struct uart_8250_port *up) {}
+#endif
+
#ifdef CONFIG_SERIAL_8250_FINTEK
int fintek_8250_probe(struct uart_8250_port *uart);
#else
@@ -345,6 +372,7 @@ static inline int is_omap1510_8250(struct uart_8250_port *pt)
#ifdef CONFIG_SERIAL_8250_DMA
extern int serial8250_tx_dma(struct uart_8250_port *);
+extern void serial8250_tx_dma_flush(struct uart_8250_port *);
extern int serial8250_rx_dma(struct uart_8250_port *);
extern void serial8250_rx_dma_flush(struct uart_8250_port *);
extern int serial8250_request_dma(struct uart_8250_port *);
@@ -365,11 +393,19 @@ static inline void serial8250_do_prepare_rx_dma(struct uart_8250_port *p)
if (dma->prepare_rx_dma)
dma->prepare_rx_dma(p);
}
+
+static inline bool serial8250_tx_dma_running(struct uart_8250_port *p)
+{
+ struct uart_8250_dma *dma = p->dma;
+
+ return dma && dma->tx_running;
+}
#else
static inline int serial8250_tx_dma(struct uart_8250_port *p)
{
return -1;
}
+static inline void serial8250_tx_dma_flush(struct uart_8250_port *p) { }
static inline int serial8250_rx_dma(struct uart_8250_port *p)
{
return -1;
@@ -380,6 +416,11 @@ static inline int serial8250_request_dma(struct uart_8250_port *p)
return -1;
}
static inline void serial8250_release_dma(struct uart_8250_port *p) { }
+
+static inline bool serial8250_tx_dma_running(struct uart_8250_port *p)
+{
+ return false;
+}
#endif
static inline int ns16550a_goto_highspeed(struct uart_8250_port *up)
generated by cgit (git 2.34.1) at 2025-12-26 08:50:56 +0000