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