//=============================================================================////      ser.c////      Simple driver for the MDSChip serial port////=============================================================================//####ECOSGPLCOPYRIGHTBEGIN####// -------------------------------------------// This file is part of eCos, the Embedded Configurable Operating System.// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.//// eCos is free software; you can redistribute it and/or modify it under// the terms of the GNU General Public License as published by the Free// Software Foundation; either version 2 or (at your option) any later version.//// eCos is distributed in the hope that it will be useful, but WITHOUT ANY// WARRANTY; without even the implied warranty of MERCHANTABILITY or// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License// for more details.//// You should have received a copy of the GNU General Public License along// with eCos; if not, write to the Free Software Foundation, Inc.,// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.//// As a special exception, if other files instantiate templates or use macros// or inline functions from this file, or you compile this file and link it// with other works to produce a work based on this file, this file does not// by itself cause the resulting work to be covered by the GNU General Public// License. However the source code for this file must still be made available// in accordance with section (3) of the GNU General Public License.//// This exception does not invalidate any other reasons why a work based on// this file might be covered by the GNU General Public License.//// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.// at http://sources.redhat.com/ecos/ecos-license/// -------------------------------------------//####ECOSGPLCOPYRIGHTEND####//=============================================================================//#####DESCRIPTIONBEGIN####//// Author(s):   msalter// Contributors:msalter// Date:        2001-02-12// Description: Simple driver for the MDSChip serial port////####DESCRIPTIONEND####////=============================================================================#include <pkgconf/hal.h>#include <pkgconf/system.h>#include CYGBLD_HAL_PLATFORM_H#include <cyg/hal/hal_arch.h>           // SAVE/RESTORE GP macros#include <cyg/hal/hal_io.h>             // IO macros#include <cyg/hal/hal_if.h>             // interface API#include <cyg/hal/hal_intr.h>           // HAL_ENABLE/MASK/UNMASK_INTERRUPTS#include <cyg/hal/hal_misc.h>           // Helper functions#include <cyg/hal/drv_api.h>            // CYG_ISR_HANDLED// We have no control over baud rate#if CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD==57600#define CYG_DEV_SERIAL_BAUD_DIVISOR    BAUD_57600#endif#ifndef CYG_DEV_SERIAL_BAUD_DIVISOR#error Missing/incorrect serial baud rate defined - CDL error?#endif//-----------------------------------------------------------------------------typedef struct {    cyg_uint8* base;    cyg_int32 msec_timeout;    int isr_vector;} channel_data_t;static channel_data_t channels[1] = {    { (cyg_uint8*)0, 1000, 0}};//-----------------------------------------------------------------------------// The minimal init, get and put functions. All by polling.voidcyg_hal_plf_serial_init_channel(void* __ch_data){    cyg_hal_plf_write_sr_rbr(0);    cyg_hal_plf_write_sr_tbr(0);    cyg_hal_plf_write_tbr(0);    cyg_hal_plf_write_rbr(0);}voidcyg_hal_plf_serial_putc(void* __ch_data, cyg_uint8 __ch){    // wait for tx rdy    while (cyg_hal_plf_read_sr_tbr() != 0) ;    // Now, write it    cyg_hal_plf_write_tbr(__ch);    // and set TBR    cyg_hal_plf_write_sr_tbr(1);}static cyg_boolcyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch){    if (cyg_hal_plf_read_sr_rbr() == 0)	return false;    *ch = cyg_hal_plf_read_rbr();    cyg_hal_plf_write_sr_rbr(0);    return true;}cyg_uint8cyg_hal_plf_serial_getc(void* __ch_data){    cyg_uint8 ch;    while(!cyg_hal_plf_serial_getc_nonblock(__ch_data, &ch));    return ch;}static voidcyg_hal_plf_serial_write(void* __ch_data, const cyg_uint8* __buf,                          cyg_uint32 __len){    while(__len-- > 0)        cyg_hal_plf_serial_putc(__ch_data, *__buf++);}static voidcyg_hal_plf_serial_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len){    while(__len-- > 0)        *__buf++ = cyg_hal_plf_serial_getc(__ch_data);}cyg_boolcyg_hal_plf_serial_getc_timeout(void* __ch_data, cyg_uint8* ch){    int delay_count;    channel_data_t* chan;    cyg_bool res;    // Some of the diagnostic print code calls through here with no idea what the ch_data is.    // Go ahead and assume it is channels[0].    if (__ch_data == 0)      __ch_data = (void*)&channels[0];    chan = (channel_data_t*)__ch_data;    delay_count = chan->msec_timeout * 10; // delay in .1 ms steps    for(;;) {        res = cyg_hal_plf_serial_getc_nonblock(__ch_data, ch);        if (res || 0 == delay_count--)            break;        CYGACC_CALL_IF_DELAY_US(100);    }    return res;}static intcyg_hal_plf_serial_control(void *__ch_data, __comm_control_cmd_t __func, ...){    static int irq_state = 0;    channel_data_t* chan;    int ret = 0;    // Some of the diagnostic print code calls through here with no idea what the ch_data is.    // Go ahead and assume it is channels[0].    if (__ch_data == 0)      __ch_data = (void*)&channels[0];    chan = (channel_data_t*)__ch_data;    switch (__func) {    case __COMMCTL_IRQ_ENABLE:        irq_state = 1;        HAL_INTERRUPT_SET_LEVEL(chan->isr_vector, 1);        HAL_INTERRUPT_UNMASK(chan->isr_vector);        break;    case __COMMCTL_IRQ_DISABLE:        ret = irq_state;        irq_state = 0;        HAL_INTERRUPT_MASK(chan->isr_vector);        break;    case __COMMCTL_DBG_ISR_VECTOR:        ret = chan->isr_vector;        break;    case __COMMCTL_SET_TIMEOUT:    {        va_list ap;        va_start(ap, __func);        ret = chan->msec_timeout;        chan->msec_timeout = va_arg(ap, cyg_uint32);        va_end(ap);    }            break;    case __COMMCTL_SETBAUD:    {	cyg_uint32 baud_rate;        va_list ap;        va_start(ap, __func);        baud_rate = va_arg(ap, cyg_uint32);        va_end(ap);        switch (baud_rate)        {        case 57600:  break;        default:     return -1;        }    }    break;    case __COMMCTL_GETBAUD:        break;    default:        break;    }    return ret;}static intcyg_hal_plf_serial_isr(void *__ch_data, int* __ctrlc,                        CYG_ADDRWORD __vector, CYG_ADDRWORD __data){    *__ctrlc = 0;    return 0;}static voidcyg_hal_plf_serial_init(void){    hal_virtual_comm_table_t* comm;    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);    // Disable interrupts.    HAL_INTERRUPT_MASK(channels[0].isr_vector);    // Init channels    cyg_hal_plf_serial_init_channel((void*)&channels[0]);        // Setup procs in the vector table    // Set channel 0    CYGACC_CALL_IF_SET_CONSOLE_COMM(0);    comm = CYGACC_CALL_IF_CONSOLE_PROCS();    CYGACC_COMM_IF_CH_DATA_SET(*comm, &channels[0]);    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);    CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);    CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);    // Restore original console    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);}voidcyg_hal_plf_comms_init(void){    static int initialized = 0;    if (initialized)        return;    initialized = 1;    cyg_hal_plf_serial_init();}//-----------------------------------------------------------------------------// end of ser16c550c.c