sleb_sdtr.c

eCos1.31版

//==========================================================================
//
//      io/serial/sparclite/sleb_sdtr.c
//
//      Serial I/O interface module for SPARClite Eval Board (SLEB)
//
//==========================================================================
//####COPYRIGHTBEGIN####
//                                                                          
// -------------------------------------------                              
// The contents of this file are subject to the Red Hat eCos Public License 
// Version 1.1 (the "License"); you may not use this file except in         
// compliance with the License.  You may obtain a copy of the License at    
// http://www.redhat.com/                                                   
//                                                                          
// Software distributed under the License is distributed on an "AS IS"      
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
// License for the specific language governing rights and limitations under 
// the License.                                                             
//                                                                          
// The Original Code is eCos - Embedded Configurable Operating System,      
// released September 30, 1998.                                             
//                                                                          
// The Initial Developer of the Original Code is Red Hat.                   
// Portions created by Red Hat are                                          
// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
// All Rights Reserved.                                                     
// -------------------------------------------                              
//                                                                          
//####COPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   gthomas
// Contributors:  gthomas
// Date:        1999-02-04
// Purpose:     SLEB serial I/O module
// Description: 
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/io.h>
#include <pkgconf/io_serial.h>
#include <cyg/io/io.h>
#include <cyg/hal/hal_intr.h>
#include <cyg/io/devtab.h>
#include <cyg/io/serial.h>

#ifdef  CYGPKG_IO_SERIAL_SPARCLITE_SLEB

#include "sleb_sdtr.h"

extern void diag_printf(const char *fmt, ...);

#define BUFSIZE 128

typedef struct sleb_sdtr_info {
    CYG_ADDRWORD   base;
    CYG_WORD       tx_int_num;
    CYG_WORD       rx_int_num;
    cyg_interrupt  tx_serial_interrupt;
    cyg_handle_t   tx_serial_interrupt_handle;
    cyg_interrupt  rx_serial_interrupt;
    cyg_handle_t   rx_serial_interrupt_handle;
    cyg_uint8      cmd_reg;
    bool           xmit_enabled;
} sleb_sdtr_info;

static bool sleb_sdtr_init(struct cyg_devtab_entry *tab);
static bool sleb_sdtr_putc(serial_channel *chan, unsigned char c);
static Cyg_ErrNo sleb_sdtr_lookup(struct cyg_devtab_entry **tab, 
                                   struct cyg_devtab_entry *sub_tab,
                                   const char *name);
static unsigned char sleb_sdtr_getc(serial_channel *chan);
static bool sleb_sdtr_set_config(serial_channel *chan, cyg_serial_info_t *config);
static void sleb_sdtr_start_xmit(serial_channel *chan);
static void sleb_sdtr_stop_xmit(serial_channel *chan);

static cyg_uint32 sleb_sdtr_tx_ISR(cyg_vector_t vector, cyg_addrword_t data);
static void       sleb_sdtr_tx_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);
static cyg_uint32 sleb_sdtr_rx_ISR(cyg_vector_t vector, cyg_addrword_t data);
static void       sleb_sdtr_rx_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);

static SERIAL_FUNS(sleb_sdtr_funs, 
                   sleb_sdtr_putc, 
                   sleb_sdtr_getc,
                   sleb_sdtr_set_config,
                   sleb_sdtr_start_xmit,
                   sleb_sdtr_stop_xmit
    );

#ifdef CYGPKG_IO_SERIAL_SPARCLITE_SLEB_CON1
static sleb_sdtr_info sleb_sdtr_info0 = {SLEB_SDTR0_BASE, SLEB_SDTR0_TX_INT, SLEB_SDTR0_RX_INT};
#if CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON1_BUFSIZE > 0
static unsigned char sleb_sdtr_out_buf0[CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON1_BUFSIZE];
static unsigned char sleb_sdtr_in_buf0[CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON1_BUFSIZE];

static SERIAL_CHANNEL_USING_INTERRUPTS(sleb_sdtr_channel0,
                                       sleb_sdtr_funs, 
                                       sleb_sdtr_info0,
                                       CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON1_BAUD),
                                       CYG_SERIAL_STOP_DEFAULT,
                                       CYG_SERIAL_PARITY_DEFAULT,
                                       CYG_SERIAL_WORD_LENGTH_DEFAULT,
                                       CYG_SERIAL_FLAGS_DEFAULT,
                                       &sleb_sdtr_out_buf0[0], sizeof(sleb_sdtr_out_buf0),
                                       &sleb_sdtr_in_buf0[0], sizeof(sleb_sdtr_in_buf0)
    );
#else
static SERIAL_CHANNEL(sleb_sdtr_channel0,
                      sleb_sdtr_funs, 
                      sleb_sdtr_info0,
                      CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON1_BAUD),
                      CYG_SERIAL_STOP_DEFAULT,
                      CYG_SERIAL_PARITY_DEFAULT,
                      CYG_SERIAL_WORD_LENGTH_DEFAULT,
                      CYG_SERIAL_FLAGS_DEFAULT
    );
#endif

DEVTAB_ENTRY(sleb_sdtr_io0, 
             CYGDAT_IO_SERIAL_SPARCLITE_SLEB_CON1_NAME,
             0,                     // Does not depend on a lower level interface
             &cyg_io_serial_devio, 
             sleb_sdtr_init, 
             sleb_sdtr_lookup,     // Serial driver may need initializing
             &sleb_sdtr_channel0
    );
#endif // CYGPKG_IO_SERIAL_SPARCLITE_SLEB_CON1

#ifdef  CYGPKG_IO_SERIAL_SPARCLITE_SLEB_CON2
static sleb_sdtr_info sleb_sdtr_info1 = {SLEB_SDTR1_BASE, SLEB_SDTR1_TX_INT, SLEB_SDTR1_RX_INT};
#if CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON2_BUFSIZE > 0
static unsigned char sleb_sdtr_out_buf1[CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON2_BUFSIZE];
static unsigned char sleb_sdtr_in_buf1[CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON2_BUFSIZE];

static SERIAL_CHANNEL_USING_INTERRUPTS(sleb_sdtr_channel1,
                                       sleb_sdtr_funs, 
                                       sleb_sdtr_info1,
                                       CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON2_BAUD),
                                       CYG_SERIAL_STOP_DEFAULT,
                                       CYG_SERIAL_PARITY_DEFAULT,
                                       CYG_SERIAL_WORD_LENGTH_DEFAULT,
                                       CYG_SERIAL_FLAGS_DEFAULT,
                                       &sleb_sdtr_out_buf1[0], sizeof(sleb_sdtr_out_buf1),
                                       &sleb_sdtr_in_buf1[0], sizeof(sleb_sdtr_in_buf1)
    );
#else
static SERIAL_CHANNEL(sleb_sdtr_channel1,
                      sleb_sdtr_funs, 
                      sleb_sdtr_info1,
                      CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_SPARCLITE_SLEB_CON2_BAUD),
                      CYG_SERIAL_STOP_DEFAULT,
                      CYG_SERIAL_PARITY_DEFAULT,
                      CYG_SERIAL_WORD_LENGTH_DEFAULT,
                      CYG_SERIAL_FLAGS_DEFAULT
    );
#endif

DEVTAB_ENTRY(sleb_sdtr_io1, 
             CYGDAT_IO_SERIAL_SPARCLITE_SLEB_CON2_NAME,
             0,                     // Does not depend on a lower level interface
             &cyg_io_serial_devio, 
             sleb_sdtr_init, 
             sleb_sdtr_lookup,     // Serial driver may need initializing
             &sleb_sdtr_channel1
    );
#endif // CYGPKG_IO_SERIAL_SPARCLITE_SLEB_CON2

// Internal function to actually configure the hardware to desired baud rate, etc.
static bool
sleb_sdtr_config_port(serial_channel *chan, cyg_serial_info_t *new_config, bool init)
{
    sleb_sdtr_info *sdtr_chan = (sleb_sdtr_info *)chan->dev_priv;
    CYG_ADDRWORD port = sdtr_chan->base;
    cyg_int32 baud_divisor;
    cyg_int32 clk, tval;
    unsigned char mode;
#if 0
    if ((new_config->baud < CYGNUM_SERIAL_BAUD_MIN) || (new_config->baud > CYGNUM_SERIAL_BAUD_MAX))
        return false;  // Invalid baud rate
#endif
    baud_divisor = select_baud[new_config->baud];
    if (baud_divisor == 0)
        return false; // Unsupported baud rate
    // Reset the port