Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 194 insertions, 0 deletions

diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
new file mode 100644
index 000000000..79b328861
--- /dev/null
+++ b/include/linux/serial_8250.h
@@ -0,0 +1,194 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  linux/include/linux/serial_8250.h
+ *
+ *  Copyright (C) 2004 Russell King
+ */
+#ifndef _LINUX_SERIAL_8250_H
+#define _LINUX_SERIAL_8250_H
+
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+#include <linux/platform_device.h>
+
+/*
+ * This is the platform device platform_data structure
+ */
+struct plat_serial8250_port {
+	unsigned long	iobase;		/* io base address */
+	void __iomem	*membase;	/* ioremap cookie or NULL */
+	resource_size_t	mapbase;	/* resource base */
+	unsigned int	irq;		/* interrupt number */
+	unsigned long	irqflags;	/* request_irq flags */
+	unsigned int	uartclk;	/* UART clock rate */
+	void            *private_data;
+	unsigned char	regshift;	/* register shift */
+	unsigned char	iotype;		/* UPIO_* */
+	unsigned char	hub6;
+	unsigned char	has_sysrq;	/* supports magic SysRq */
+	upf_t		flags;		/* UPF_* flags */
+	unsigned int	type;		/* If UPF_FIXED_TYPE */
+	unsigned int	(*serial_in)(struct uart_port *, int);
+	void		(*serial_out)(struct uart_port *, int, int);
+	void		(*set_termios)(struct uart_port *,
+			               struct ktermios *new,
+			               const struct ktermios *old);
+	void		(*set_ldisc)(struct uart_port *,
+				     struct ktermios *);
+	unsigned int	(*get_mctrl)(struct uart_port *);
+	int		(*handle_irq)(struct uart_port *);
+	void		(*pm)(struct uart_port *, unsigned int state,
+			      unsigned old);
+	void		(*handle_break)(struct uart_port *);
+};
+
+/*
+ * Allocate 8250 platform device IDs.  Nothing is implied by
+ * the numbering here, except for the legacy entry being -1.
+ */
+enum {
+	PLAT8250_DEV_LEGACY = -1,
+	PLAT8250_DEV_PLATFORM,
+	PLAT8250_DEV_PLATFORM1,
+	PLAT8250_DEV_PLATFORM2,
+	PLAT8250_DEV_FOURPORT,
+	PLAT8250_DEV_ACCENT,
+	PLAT8250_DEV_BOCA,
+	PLAT8250_DEV_EXAR_ST16C554,
+	PLAT8250_DEV_HUB6,
+	PLAT8250_DEV_AU1X00,
+	PLAT8250_DEV_SM501,
+};
+
+struct uart_8250_dma;
+struct uart_8250_port;
+
+/**
+ * 8250 core driver operations
+ *
+ * @setup_irq()		Setup irq handling. The universal 8250 driver links this
+ *			port to the irq chain. Other drivers may @request_irq().
+ * @release_irq()	Undo irq handling. The universal 8250 driver unlinks
+ *			the port from the irq chain.
+ */
+struct uart_8250_ops {
+	int		(*setup_irq)(struct uart_8250_port *);
+	void		(*release_irq)(struct uart_8250_port *);
+	void		(*setup_timer)(struct uart_8250_port *);
+};
+
+struct uart_8250_em485 {
+	struct hrtimer		start_tx_timer; /* "rs485 start tx" timer */
+	struct hrtimer		stop_tx_timer;  /* "rs485 stop tx" timer */
+	struct hrtimer		*active_timer;  /* pointer to active timer */
+	struct uart_8250_port	*port;          /* for hrtimer callbacks */
+	unsigned int		tx_stopped:1;	/* tx is currently stopped */
+};
+
+/*
+ * This should be used by drivers which want to register
+ * their own 8250 ports without registering their own
+ * platform device.  Using these will make your driver
+ * dependent on the 8250 driver.
+ */
+
+struct uart_8250_port {
+	struct uart_port	port;
+	struct timer_list	timer;		/* "no irq" timer */
+	struct list_head	list;		/* ports on this IRQ */
+	u32			capabilities;	/* port capabilities */
+	unsigned short		bugs;		/* port bugs */
+	unsigned int		tx_loadsz;	/* transmit fifo load size */
+	unsigned char		acr;
+	unsigned char		fcr;
+	unsigned char		ier;
+	unsigned char		lcr;
+	unsigned char		mcr;
+	unsigned char		cur_iotype;	/* Running I/O type */
+	unsigned int		rpm_tx_active;
+	unsigned char		canary;		/* non-zero during system sleep
+						 *   if no_console_suspend
+						 */
+	unsigned char		probe;
+	struct mctrl_gpios	*gpios;
+#define UART_PROBE_RSA	(1 << 0)
+
+	/*
+	 * Some bits in registers are cleared on a read, so they must
+	 * be saved whenever the register is read but the bits will not
+	 * be immediately processed.
+	 */
+#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
+	u16			lsr_saved_flags;
+	u16			lsr_save_mask;
+#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
+	unsigned char		msr_saved_flags;
+
+	struct uart_8250_dma	*dma;
+	const struct uart_8250_ops *ops;
+
+	/* 8250 specific callbacks */
+	int			(*dl_read)(struct uart_8250_port *);
+	void			(*dl_write)(struct uart_8250_port *, int);
+
+	struct uart_8250_em485 *em485;
+	void			(*rs485_start_tx)(struct uart_8250_port *);
+	void			(*rs485_stop_tx)(struct uart_8250_port *);
+
+	/* Serial port overrun backoff */
+	struct delayed_work overrun_backoff;
+	u32 overrun_backoff_time_ms;
+};
+
+static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)
+{
+	return container_of(up, struct uart_8250_port, port);
+}
+
+int serial8250_register_8250_port(const struct uart_8250_port *);
+void serial8250_unregister_port(int line);
+void serial8250_suspend_port(int line);
+void serial8250_resume_port(int line);
+
+extern int early_serial_setup(struct uart_port *port);
+
+extern int early_serial8250_setup(struct earlycon_device *device,
+					 const char *options);
+extern void serial8250_update_uartclk(struct uart_port *port,
+				      unsigned int uartclk);
+extern void serial8250_do_set_termios(struct uart_port *port,
+		struct ktermios *termios, const struct ktermios *old);
+extern void serial8250_do_set_ldisc(struct uart_port *port,
+				    struct ktermios *termios);
+extern unsigned int serial8250_do_get_mctrl(struct uart_port *port);
+extern int serial8250_do_startup(struct uart_port *port);
+extern void serial8250_do_shutdown(struct uart_port *port);
+extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
+			     unsigned int oldstate);
+extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl);
+extern void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
+				      unsigned int quot,
+				      unsigned int quot_frac);
+extern int fsl8250_handle_irq(struct uart_port *port);
+int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
+u16 serial8250_rx_chars(struct uart_8250_port *up, u16 lsr);
+void serial8250_read_char(struct uart_8250_port *up, u16 lsr);
+void serial8250_tx_chars(struct uart_8250_port *up);
+unsigned int serial8250_modem_status(struct uart_8250_port *up);
+void serial8250_init_port(struct uart_8250_port *up);
+void serial8250_set_defaults(struct uart_8250_port *up);
+void serial8250_console_write(struct uart_8250_port *up, const char *s,
+			      unsigned int count);
+int serial8250_console_setup(struct uart_port *port, char *options, bool probe);
+int serial8250_console_exit(struct uart_port *port);
+
+extern void serial8250_set_isa_configurator(void (*v)
+					(int port, struct uart_port *up,
+						u32 *capabilities));
+
+#ifdef CONFIG_SERIAL_8250_RT288X
+unsigned int au_serial_in(struct uart_port *p, int offset);
+void au_serial_out(struct uart_port *p, int offset, int value);
+#endif
+
+#endif