root/include/asm-mn10300/unit-asb2303/serial.h

INCLUDED FROM

DEFINITIONS

1. __debug_to_serial
2. __debug_to_serial

/* ASB2303-specific 8250 serial ports
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

#ifndef _ASM_UNIT_SERIAL_H
#define _ASM_UNIT_SERIAL_H

#include <asm/cpu-regs.h>
#include <asm/proc/irq.h>
#include <linux/serial_reg.h>

#define SERIAL_PORT0_BASE_ADDRESS       0xA6FB0000
#define SERIAL_PORT1_BASE_ADDRESS       0xA6FC0000

#define SERIAL_IRQ      XIRQ0   /* Dual serial (PC16552)        (Hi) */

/*
 * dispose of the /dev/ttyS0 and /dev/ttyS1 serial ports
 */
#ifndef CONFIG_GDBSTUB_ON_TTYSx

#define SERIAL_PORT_DFNS                                                \
        {                                                               \
        .baud_base              = BASE_BAUD,                            \
        .irq                    = SERIAL_IRQ,                           \
        .flags                  = STD_COM_FLAGS,                        \
        .iomem_base             = (u8 *) SERIAL_PORT0_BASE_ADDRESS,     \
        .iomem_reg_shift        = 2,                                    \
        .io_type                = SERIAL_IO_MEM,                        \
        },                                                              \
        {                                                               \
        .baud_base              = BASE_BAUD,                            \
        .irq                    = SERIAL_IRQ,                           \
        .flags                  = STD_COM_FLAGS,                        \
        .iomem_base             = (u8 *) SERIAL_PORT1_BASE_ADDRESS,     \
        .iomem_reg_shift        = 2,                                    \
        .io_type                = SERIAL_IO_MEM,                        \
        },

#ifndef __ASSEMBLY__

static inline void __debug_to_serial(const char *p, int n)
{
}

#endif /* !__ASSEMBLY__ */

#else /* CONFIG_GDBSTUB_ON_TTYSx */

#define SERIAL_PORT_DFNS /* both stolen by gdb-stub because they share an IRQ */

#if defined(CONFIG_GDBSTUB_ON_TTYS0)
#define GDBPORT_SERIAL_RX       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_RX  * 4, u8)
#define GDBPORT_SERIAL_TX       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX  * 4, u8)
#define GDBPORT_SERIAL_DLL      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLL * 4, u8)
#define GDBPORT_SERIAL_DLM      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLM * 4, u8)
#define GDBPORT_SERIAL_IER      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 4, u8)
#define GDBPORT_SERIAL_IIR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IIR * 4, u8)
#define GDBPORT_SERIAL_FCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_FCR * 4, u8)
#define GDBPORT_SERIAL_LCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LCR * 4, u8)
#define GDBPORT_SERIAL_MCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
#define GDBPORT_SERIAL_LSR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
#define GDBPORT_SERIAL_MSR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
#define GDBPORT_SERIAL_SCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_SCR * 4, u8)
#define GDBPORT_SERIAL_IRQ      SERIAL_IRQ

#elif defined(CONFIG_GDBSTUB_ON_TTYS1)
#define GDBPORT_SERIAL_RX       __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_RX  * 4, u8)
#define GDBPORT_SERIAL_TX       __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_TX  * 4, u8)
#define GDBPORT_SERIAL_DLL      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_DLL * 4, u8)
#define GDBPORT_SERIAL_DLM      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_DLM * 4, u8)
#define GDBPORT_SERIAL_IER      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_IER * 4, u8)
#define GDBPORT_SERIAL_IIR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_IIR * 4, u8)
#define GDBPORT_SERIAL_FCR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_FCR * 4, u8)
#define GDBPORT_SERIAL_LCR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_LCR * 4, u8)
#define GDBPORT_SERIAL_MCR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_MCR * 4, u8)
#define GDBPORT_SERIAL_LSR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_LSR * 4, u8)
#define GDBPORT_SERIAL_MSR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_MSR * 4, u8)
#define GDBPORT_SERIAL_SCR      __SYSREG(SERIAL_PORT1_BASE_ADDRESS + UART_SCR * 4, u8)
#define GDBPORT_SERIAL_IRQ      SERIAL_IRQ
#endif

#ifndef __ASSEMBLY__

#define LSR_WAIT_FOR(STATE)                                     \
do {                                                            \
        while (!(GDBPORT_SERIAL_LSR & UART_LSR_##STATE)) {}     \
} while (0)
#define FLOWCTL_WAIT_FOR(LINE)                                  \
do {                                                            \
        while (!(GDBPORT_SERIAL_MSR & UART_MSR_##LINE)) {}      \
} while (0)
#define FLOWCTL_CLEAR(LINE)                     \
do {                                            \
        GDBPORT_SERIAL_MCR &= ~UART_MCR_##LINE; \
} while (0)
#define FLOWCTL_SET(LINE)                       \
do {                                            \
        GDBPORT_SERIAL_MCR |= UART_MCR_##LINE;  \
} while (0)
#define FLOWCTL_QUERY(LINE)     ({ GDBPORT_SERIAL_MSR & UART_MSR_##LINE; })

static inline void __debug_to_serial(const char *p, int n)
{
        char ch;

        FLOWCTL_SET(DTR);

        for (; n > 0; n--) {
                LSR_WAIT_FOR(THRE);
                FLOWCTL_WAIT_FOR(CTS);

                ch = *p++;
                if (ch == 0x0a) {
                        GDBPORT_SERIAL_TX = 0x0d;
                        LSR_WAIT_FOR(THRE);
                        FLOWCTL_WAIT_FOR(CTS);
                }
                GDBPORT_SERIAL_TX = ch;
        }

        FLOWCTL_CLEAR(DTR);
}

#endif /* !__ASSEMBLY__ */

#endif /* CONFIG_GDBSTUB_ON_TTYSx */

#endif /* _ASM_UNIT_SERIAL_H */