132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/*
|
|
* serial.h - common serial defines for early debug and serial driver.
|
|
* any functions defined here must be always_inline since
|
|
* initcode cannot have function calls.
|
|
*
|
|
* Copyright (c) 2004-2011 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef __BFIN_CPU_SERIAL_H__
|
|
#define __BFIN_CPU_SERIAL_H__
|
|
|
|
#include <asm/blackfin.h>
|
|
#include <asm/portmux.h>
|
|
|
|
#ifndef CONFIG_UART_CONSOLE
|
|
# define CONFIG_UART_CONSOLE 0
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_EARLY_SERIAL
|
|
# define BFIN_DEBUG_EARLY_SERIAL 1
|
|
#else
|
|
# define BFIN_DEBUG_EARLY_SERIAL 0
|
|
#endif
|
|
|
|
#if defined(__ADSPBF60x__)
|
|
# define BFIN_UART_HW_VER 4
|
|
#elif defined(__ADSPBF50x__) || defined(__ADSPBF54x__)
|
|
# define BFIN_UART_HW_VER 2
|
|
#else
|
|
# define BFIN_UART_HW_VER 1
|
|
#endif
|
|
|
|
#define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx
|
|
#define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx)
|
|
#define _P_UART(n, pin) _PASTE_UART(n, P_UART, pin)
|
|
#define P_UART(pin) _P_UART(CONFIG_UART_CONSOLE, pin)
|
|
|
|
#define pUART ((volatile struct bfin_mmr_serial *)uart_base)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
__attribute__((always_inline))
|
|
static inline void serial_do_portmux(void);
|
|
#endif
|
|
|
|
#if BFIN_UART_HW_VER < 4
|
|
# include "serial1.h"
|
|
#else
|
|
# include "serial4.h"
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
__attribute__((always_inline))
|
|
static inline void serial_do_portmux(void)
|
|
{
|
|
if (!BFIN_DEBUG_EARLY_SERIAL) {
|
|
const unsigned short pins[] = { P_UART(RX), P_UART(TX), 0, };
|
|
peripheral_request_list(pins, "bfin-uart");
|
|
return;
|
|
}
|
|
|
|
serial_early_do_portmux();
|
|
}
|
|
|
|
#ifndef BFIN_IN_INITCODE
|
|
__attribute__((always_inline))
|
|
static inline void serial_early_puts(const char *s)
|
|
{
|
|
if (BFIN_DEBUG_EARLY_SERIAL) {
|
|
serial_puts("Early: ");
|
|
serial_puts(s);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#else
|
|
|
|
.macro serial_early_init
|
|
#if defined(CONFIG_DEBUG_EARLY_SERIAL) && !defined(CONFIG_UART_MEM)
|
|
call __serial_early_init;
|
|
#endif
|
|
.endm
|
|
|
|
.macro serial_early_set_baud
|
|
#if defined(CONFIG_DEBUG_EARLY_SERIAL) && !defined(CONFIG_UART_MEM)
|
|
R0.L = LO(CONFIG_BAUDRATE);
|
|
R0.H = HI(CONFIG_BAUDRATE);
|
|
call __serial_early_set_baud;
|
|
#endif
|
|
.endm
|
|
|
|
#if CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_BYPASS
|
|
#define update_serial_early_string_addr \
|
|
R1.L = _start; \
|
|
R1.H = _start; \
|
|
R0 = R0 - R1; \
|
|
R1.L = 0; \
|
|
R1.H = 0x2000; \
|
|
R0 = R0 + R1;
|
|
#else
|
|
#define update_serial_early_string_addr
|
|
#endif
|
|
|
|
/* Since we embed the string right into our .text section, we need
|
|
* to find its address. We do this by getting our PC and adding 2
|
|
* bytes (which is the length of the jump instruction). Then we
|
|
* pass this address to serial_puts().
|
|
*/
|
|
#ifdef CONFIG_DEBUG_EARLY_SERIAL
|
|
# define serial_early_puts(str) \
|
|
.section .rodata; \
|
|
7: \
|
|
.ascii "Early:"; \
|
|
.ascii __FILE__; \
|
|
.ascii ": "; \
|
|
.ascii str; \
|
|
.asciz "\n"; \
|
|
.previous; \
|
|
R0.L = 7b; \
|
|
R0.H = 7b; \
|
|
update_serial_early_string_addr \
|
|
call _uart_early_puts;
|
|
#else
|
|
# define serial_early_puts(str)
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif
|