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Achin Gupta4f6ad662013-10-25 09:08:21 +01001/*
Dan Handley6fa89a22018-02-27 16:03:58 +00002 * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
Achin Gupta4f6ad662013-10-25 09:08:21 +01003 *
dp-armfa3cf0b2017-05-03 09:38:09 +01004 * SPDX-License-Identifier: BSD-3-Clause
Achin Gupta4f6ad662013-10-25 09:08:21 +01005 */
6
7#ifndef __CONSOLE_H__
8#define __CONSOLE_H__
9
Julius Werner94f89072017-07-31 18:15:11 -070010#include <utils_def.h>
Juan Castillo7f1f0622014-09-09 09:49:23 +010011
Julius Werner94f89072017-07-31 18:15:11 -070012#define CONSOLE_T_NEXT (U(0) * REGSZ)
13#define CONSOLE_T_FLAGS (U(1) * REGSZ)
14#define CONSOLE_T_PUTC (U(2) * REGSZ)
15#define CONSOLE_T_GETC (U(3) * REGSZ)
16#define CONSOLE_T_FLUSH (U(4) * REGSZ)
17#define CONSOLE_T_DRVDATA (U(5) * REGSZ)
18
19#define CONSOLE_FLAG_BOOT BIT(0)
20#define CONSOLE_FLAG_RUNTIME BIT(1)
21#define CONSOLE_FLAG_CRASH BIT(2)
22/* Bits 3 to 7 reserved for additional scopes in future expansion. */
23#define CONSOLE_FLAG_SCOPE_MASK ((U(1) << 8) - 1)
24/* Bits 8 to 31 reserved for non-scope use in future expansion. */
25
26/* Returned by getc callbacks when receive FIFO is empty. */
27#define ERROR_NO_PENDING_CHAR (-1)
28/* Returned by console_xxx() if no registered console implements xxx. */
29#define ERROR_NO_VALID_CONSOLE (-128)
30
31#ifndef __ASSEMBLY__
32
33#include <types.h>
34
35typedef struct console {
36 struct console *next;
37 u_register_t flags;
38 int (*putc)(int character, struct console *console);
39 int (*getc)(struct console *console);
40 int (*flush)(struct console *console);
41 /* Additional private driver data may follow here. */
42} console_t;
43#include <console_assertions.h> /* offset macro assertions for console_t */
44
45/*
46 * NOTE: There is no publicly accessible console_register() function. Consoles
47 * are registered by directly calling the register function of a specific
48 * implementation, e.g. console_16550_register() from <uart_16550.h>. Consoles
49 * registered that way can be unregistered/reconfigured with below functions.
50 */
51/* Remove a single console_t instance from the console list. */
52int console_unregister(console_t *console);
53/* Set scope mask of a console that determines in what states it is active. */
54void console_set_scope(console_t *console, unsigned int scope);
55
56/* Switch to a new global console state (CONSOLE_FLAG_BOOT/RUNTIME/CRASH). */
57void console_switch_state(unsigned int new_state);
58/* Output a character on all consoles registered for the current state. */
Achin Gupta4f6ad662013-10-25 09:08:21 +010059int console_putc(int c);
Julius Werner94f89072017-07-31 18:15:11 -070060/* Read a character (blocking) from any console registered for current state. */
Achin Gupta4f6ad662013-10-25 09:08:21 +010061int console_getc(void);
Julius Werner94f89072017-07-31 18:15:11 -070062/* Flush all consoles registered for the current state. */
Antonio Nino Diaz8377ae42017-02-06 16:03:41 +000063int console_flush(void);
Achin Gupta4f6ad662013-10-25 09:08:21 +010064
Julius Werner94f89072017-07-31 18:15:11 -070065#if !MULTI_CONSOLE_API
Dan Handley6fa89a22018-02-27 16:03:58 +000066/* REMOVED on AArch64 -- use console_<driver>_register() instead! */
Julius Werner94f89072017-07-31 18:15:11 -070067int console_init(uintptr_t base_addr,
Dan Handley6fa89a22018-02-27 16:03:58 +000068 unsigned int uart_clk, unsigned int baud_rate);
69void console_uninit(void);
Julius Werner94f89072017-07-31 18:15:11 -070070#endif
71
72#endif /* __ASSEMBLY__ */
73
Achin Gupta4f6ad662013-10-25 09:08:21 +010074#endif /* __CONSOLE_H__ */
75