//==========================================================================
|
//==========================================================================
|
//
|
//
|
// io/serial/arm/cma230_serial.c
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// io/serial/arm/cma230_serial.c
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//
|
//
|
// Cogent CMA230 Serial I/O Interface Module (interrupt driven)
|
// Cogent CMA230 Serial I/O Interface Module (interrupt driven)
|
//
|
//
|
//==========================================================================
|
//==========================================================================
|
//####ECOSGPLCOPYRIGHTBEGIN####
|
//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
|
// -------------------------------------------
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
|
//
|
//
|
// eCos is free software; you can redistribute it and/or modify it under
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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//
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// You should have received a copy of the GNU General Public License along
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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//
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// As a special exception, if other files instantiate templates or use macros
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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// in accordance with section (3) of the GNU General Public License.
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//
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//
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// This exception does not invalidate any other reasons why a work based on
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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// this file might be covered by the GNU General Public License.
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//
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//
|
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
|
// at http://sources.redhat.com/ecos/ecos-license/
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//####ECOSGPLCOPYRIGHTEND####
|
//==========================================================================
|
//==========================================================================
|
//#####DESCRIPTIONBEGIN####
|
//#####DESCRIPTIONBEGIN####
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//
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//
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// Author(s): gthomas
|
// Author(s): gthomas
|
// Contributors: gthomas
|
// Contributors: gthomas
|
// Date: 1999-02-04
|
// Date: 1999-02-04
|
// Purpose: CMA230 Serial I/O module (interrupt driven version)
|
// Purpose: CMA230 Serial I/O module (interrupt driven version)
|
// Description:
|
// Description:
|
//
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//
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//####DESCRIPTIONEND####
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//####DESCRIPTIONEND####
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//
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//
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//==========================================================================
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//==========================================================================
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|
|
#include <pkgconf/system.h>
|
#include <pkgconf/system.h>
|
#include <pkgconf/io_serial.h>
|
#include <pkgconf/io_serial.h>
|
#include <pkgconf/io.h>
|
#include <pkgconf/io.h>
|
#include <cyg/io/io.h>
|
#include <cyg/io/io.h>
|
#include <cyg/hal/hal_intr.h>
|
#include <cyg/hal/hal_intr.h>
|
#include <cyg/io/devtab.h>
|
#include <cyg/io/devtab.h>
|
#include <cyg/io/serial.h>
|
#include <cyg/io/serial.h>
|
#include <cyg/hal/hal_cma230.h>
|
#include <cyg/hal/hal_cma230.h>
|
#include <cyg/infra/diag.h>
|
#include <cyg/infra/diag.h>
|
|
|
#ifdef CYGPKG_IO_SERIAL_ARM_CMA230
|
#ifdef CYGPKG_IO_SERIAL_ARM_CMA230
|
|
|
#include "cma230_serial.h"
|
#include "cma230_serial.h"
|
|
|
typedef struct cma230_serial_info {
|
typedef struct cma230_serial_info {
|
CYG_ADDRWORD base;
|
CYG_ADDRWORD base;
|
CYG_WORD int_num;
|
CYG_WORD int_num;
|
cyg_interrupt serial_interrupt;
|
cyg_interrupt serial_interrupt;
|
cyg_handle_t serial_interrupt_handle;
|
cyg_handle_t serial_interrupt_handle;
|
} cma230_serial_info;
|
} cma230_serial_info;
|
|
|
static bool cma230_serial_init(struct cyg_devtab_entry *tab);
|
static bool cma230_serial_init(struct cyg_devtab_entry *tab);
|
static bool cma230_serial_putc(serial_channel *chan, unsigned char c);
|
static bool cma230_serial_putc(serial_channel *chan, unsigned char c);
|
static Cyg_ErrNo cma230_serial_lookup(struct cyg_devtab_entry **tab,
|
static Cyg_ErrNo cma230_serial_lookup(struct cyg_devtab_entry **tab,
|
struct cyg_devtab_entry *sub_tab,
|
struct cyg_devtab_entry *sub_tab,
|
const char *name);
|
const char *name);
|
static unsigned char cma230_serial_getc(serial_channel *chan);
|
static unsigned char cma230_serial_getc(serial_channel *chan);
|
static Cyg_ErrNo cma230_serial_set_config(serial_channel *chan, cyg_uint32 key,
|
static Cyg_ErrNo cma230_serial_set_config(serial_channel *chan, cyg_uint32 key,
|
const void *xbuf, cyg_uint32 *len);
|
const void *xbuf, cyg_uint32 *len);
|
static void cma230_serial_start_xmit(serial_channel *chan);
|
static void cma230_serial_start_xmit(serial_channel *chan);
|
static void cma230_serial_stop_xmit(serial_channel *chan);
|
static void cma230_serial_stop_xmit(serial_channel *chan);
|
|
|
static cyg_uint32 cma230_serial_ISR(cyg_vector_t vector, cyg_addrword_t data);
|
static cyg_uint32 cma230_serial_ISR(cyg_vector_t vector, cyg_addrword_t data);
|
static void cma230_serial_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);
|
static void cma230_serial_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);
|
|
|
static SERIAL_FUNS(cma230_serial_funs,
|
static SERIAL_FUNS(cma230_serial_funs,
|
cma230_serial_putc,
|
cma230_serial_putc,
|
cma230_serial_getc,
|
cma230_serial_getc,
|
cma230_serial_set_config,
|
cma230_serial_set_config,
|
cma230_serial_start_xmit,
|
cma230_serial_start_xmit,
|
cma230_serial_stop_xmit
|
cma230_serial_stop_xmit
|
);
|
);
|
|
|
#ifdef CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_A
|
#ifdef CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_A
|
static cma230_serial_info cma230_serial_info0 = {CMA101_DUARTA,
|
static cma230_serial_info cma230_serial_info0 = {CMA101_DUARTA,
|
CYGNUM_HAL_INTERRUPT_SERIAL_A};
|
CYGNUM_HAL_INTERRUPT_SERIAL_A};
|
#if CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BUFSIZE > 0
|
#if CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BUFSIZE > 0
|
static unsigned char cma230_serial_out_buf0[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BUFSIZE];
|
static unsigned char cma230_serial_out_buf0[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BUFSIZE];
|
static unsigned char cma230_serial_in_buf0[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BUFSIZE];
|
static unsigned char cma230_serial_in_buf0[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BUFSIZE];
|
|
|
static SERIAL_CHANNEL_USING_INTERRUPTS(cma230_serial_channel0,
|
static SERIAL_CHANNEL_USING_INTERRUPTS(cma230_serial_channel0,
|
cma230_serial_funs,
|
cma230_serial_funs,
|
cma230_serial_info0,
|
cma230_serial_info0,
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BAUD),
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BAUD),
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_FLAGS_DEFAULT,
|
CYG_SERIAL_FLAGS_DEFAULT,
|
&cma230_serial_out_buf0[0], sizeof(cma230_serial_out_buf0),
|
&cma230_serial_out_buf0[0], sizeof(cma230_serial_out_buf0),
|
&cma230_serial_in_buf0[0], sizeof(cma230_serial_in_buf0)
|
&cma230_serial_in_buf0[0], sizeof(cma230_serial_in_buf0)
|
);
|
);
|
#else
|
#else
|
static SERIAL_CHANNEL(cma230_serial_channel0,
|
static SERIAL_CHANNEL(cma230_serial_channel0,
|
cma230_serial_funs,
|
cma230_serial_funs,
|
cma230_serial_info0,
|
cma230_serial_info0,
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BAUD),
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_A_BAUD),
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_FLAGS_DEFAULT
|
CYG_SERIAL_FLAGS_DEFAULT
|
);
|
);
|
#endif
|
#endif
|
|
|
DEVTAB_ENTRY(cma230_serial_io0,
|
DEVTAB_ENTRY(cma230_serial_io0,
|
CYGDAT_IO_SERIAL_ARM_CMA230_SERIAL_A_NAME,
|
CYGDAT_IO_SERIAL_ARM_CMA230_SERIAL_A_NAME,
|
0, // Does not depend on a lower level interface
|
0, // Does not depend on a lower level interface
|
&cyg_io_serial_devio,
|
&cyg_io_serial_devio,
|
cma230_serial_init,
|
cma230_serial_init,
|
cma230_serial_lookup, // Serial driver may need initializing
|
cma230_serial_lookup, // Serial driver may need initializing
|
&cma230_serial_channel0
|
&cma230_serial_channel0
|
);
|
);
|
#endif // CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_A
|
#endif // CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_A
|
|
|
#ifdef CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_B
|
#ifdef CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_B
|
static cma230_serial_info cma230_serial_info1 = {CMA101_DUARTB,
|
static cma230_serial_info cma230_serial_info1 = {CMA101_DUARTB,
|
CYGNUM_HAL_INTERRUPT_SERIAL_B};
|
CYGNUM_HAL_INTERRUPT_SERIAL_B};
|
#if CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BUFSIZE > 0
|
#if CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BUFSIZE > 0
|
static unsigned char cma230_serial_out_buf1[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BUFSIZE];
|
static unsigned char cma230_serial_out_buf1[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BUFSIZE];
|
static unsigned char cma230_serial_in_buf1[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BUFSIZE];
|
static unsigned char cma230_serial_in_buf1[CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BUFSIZE];
|
|
|
static SERIAL_CHANNEL_USING_INTERRUPTS(cma230_serial_channel1,
|
static SERIAL_CHANNEL_USING_INTERRUPTS(cma230_serial_channel1,
|
cma230_serial_funs,
|
cma230_serial_funs,
|
cma230_serial_info1,
|
cma230_serial_info1,
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BAUD),
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BAUD),
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_FLAGS_DEFAULT,
|
CYG_SERIAL_FLAGS_DEFAULT,
|
&cma230_serial_out_buf1[0], sizeof(cma230_serial_out_buf1),
|
&cma230_serial_out_buf1[0], sizeof(cma230_serial_out_buf1),
|
&cma230_serial_in_buf1[0], sizeof(cma230_serial_in_buf1)
|
&cma230_serial_in_buf1[0], sizeof(cma230_serial_in_buf1)
|
);
|
);
|
#else
|
#else
|
static SERIAL_CHANNEL(cma230_serial_channel1,
|
static SERIAL_CHANNEL(cma230_serial_channel1,
|
cma230_serial_funs,
|
cma230_serial_funs,
|
cma230_serial_info1,
|
cma230_serial_info1,
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BAUD),
|
CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_CMA230_SERIAL_B_BAUD),
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_STOP_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_PARITY_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_WORD_LENGTH_DEFAULT,
|
CYG_SERIAL_FLAGS_DEFAULT
|
CYG_SERIAL_FLAGS_DEFAULT
|
);
|
);
|
#endif
|
#endif
|
|
|
DEVTAB_ENTRY(cma230_serial_io1,
|
DEVTAB_ENTRY(cma230_serial_io1,
|
CYGDAT_IO_SERIAL_ARM_CMA230_SERIAL_B_NAME,
|
CYGDAT_IO_SERIAL_ARM_CMA230_SERIAL_B_NAME,
|
0, // Does not depend on a lower level interface
|
0, // Does not depend on a lower level interface
|
&cyg_io_serial_devio,
|
&cyg_io_serial_devio,
|
cma230_serial_init,
|
cma230_serial_init,
|
cma230_serial_lookup, // Serial driver may need initializing
|
cma230_serial_lookup, // Serial driver may need initializing
|
&cma230_serial_channel1
|
&cma230_serial_channel1
|
);
|
);
|
#endif // CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_B
|
#endif // CYGPKG_IO_SERIAL_ARM_CMA230_SERIAL_B
|
|
|
// Internal function to actually configure the hardware to desired baud rate, etc.
|
// Internal function to actually configure the hardware to desired baud rate, etc.
|
static bool
|
static bool
|
cma230_serial_config_port(serial_channel *chan, cyg_serial_info_t *new_config, bool init)
|
cma230_serial_config_port(serial_channel *chan, cyg_serial_info_t *new_config, bool init)
|
{
|
{
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
unsigned short baud_divisor = select_baud[new_config->baud];
|
unsigned short baud_divisor = select_baud[new_config->baud];
|
unsigned char _lcr, _ier;
|
unsigned char _lcr, _ier;
|
if (baud_divisor == 0) return false; // Invalid configuration
|
if (baud_divisor == 0) return false; // Invalid configuration
|
_ier = port->ier;
|
_ier = port->ier;
|
port->ier = 0; // Disable port interrupts while changing hardware
|
port->ier = 0; // Disable port interrupts while changing hardware
|
_lcr = select_word_length[new_config->word_length - CYGNUM_SERIAL_WORD_LENGTH_5] |
|
_lcr = select_word_length[new_config->word_length - CYGNUM_SERIAL_WORD_LENGTH_5] |
|
select_stop_bits[new_config->stop] |
|
select_stop_bits[new_config->stop] |
|
select_parity[new_config->parity];
|
select_parity[new_config->parity];
|
port->lcr = _lcr;
|
port->lcr = _lcr;
|
port->lcr |= LCR_DL;
|
port->lcr |= LCR_DL;
|
port->mdl = baud_divisor >> 8;
|
port->mdl = baud_divisor >> 8;
|
port->ldl = baud_divisor & 0xFF;
|
port->ldl = baud_divisor & 0xFF;
|
port->lcr &= ~LCR_DL;
|
port->lcr &= ~LCR_DL;
|
if (init) {
|
if (init) {
|
port->fcr = 0x07; // Enable and clear FIFO
|
port->fcr = 0x07; // Enable and clear FIFO
|
if (chan->out_cbuf.len != 0) {
|
if (chan->out_cbuf.len != 0) {
|
port->ier = IER_RCV;
|
port->ier = IER_RCV;
|
} else {
|
} else {
|
port->ier = 0;
|
port->ier = 0;
|
}
|
}
|
port->mcr = MCR_INT|MCR_DTR|MCR_RTS; // Master interrupt enable
|
port->mcr = MCR_INT|MCR_DTR|MCR_RTS; // Master interrupt enable
|
} else {
|
} else {
|
port->ier = _ier;
|
port->ier = _ier;
|
}
|
}
|
if (new_config != &chan->config) {
|
if (new_config != &chan->config) {
|
chan->config = *new_config;
|
chan->config = *new_config;
|
}
|
}
|
return true;
|
return true;
|
}
|
}
|
|
|
// Function to initialize the device. Called at bootstrap time.
|
// Function to initialize the device. Called at bootstrap time.
|
static bool
|
static bool
|
cma230_serial_init(struct cyg_devtab_entry *tab)
|
cma230_serial_init(struct cyg_devtab_entry *tab)
|
{
|
{
|
serial_channel *chan = (serial_channel *)tab->priv;
|
serial_channel *chan = (serial_channel *)tab->priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
#ifdef CYGDBG_IO_INIT
|
#ifdef CYGDBG_IO_INIT
|
diag_printf("CMA230 SERIAL init - dev: %x.%d\n", cma230_chan->base, cma230_chan->int_num);
|
diag_printf("CMA230 SERIAL init - dev: %x.%d\n", cma230_chan->base, cma230_chan->int_num);
|
#endif
|
#endif
|
(chan->callbacks->serial_init)(chan); // Really only required for interrupt driven devices
|
(chan->callbacks->serial_init)(chan); // Really only required for interrupt driven devices
|
if (chan->out_cbuf.len != 0) {
|
if (chan->out_cbuf.len != 0) {
|
cyg_drv_interrupt_create(cma230_chan->int_num,
|
cyg_drv_interrupt_create(cma230_chan->int_num,
|
99, // Priority - what goes here?
|
99, // Priority - what goes here?
|
(cyg_addrword_t)chan, // Data item passed to interrupt handler
|
(cyg_addrword_t)chan, // Data item passed to interrupt handler
|
cma230_serial_ISR,
|
cma230_serial_ISR,
|
cma230_serial_DSR,
|
cma230_serial_DSR,
|
&cma230_chan->serial_interrupt_handle,
|
&cma230_chan->serial_interrupt_handle,
|
&cma230_chan->serial_interrupt);
|
&cma230_chan->serial_interrupt);
|
cyg_drv_interrupt_attach(cma230_chan->serial_interrupt_handle);
|
cyg_drv_interrupt_attach(cma230_chan->serial_interrupt_handle);
|
cyg_drv_interrupt_unmask(cma230_chan->int_num);
|
cyg_drv_interrupt_unmask(cma230_chan->int_num);
|
}
|
}
|
cma230_serial_config_port(chan, &chan->config, true);
|
cma230_serial_config_port(chan, &chan->config, true);
|
return true;
|
return true;
|
}
|
}
|
|
|
// This routine is called when the device is "looked" up (i.e. attached)
|
// This routine is called when the device is "looked" up (i.e. attached)
|
static Cyg_ErrNo
|
static Cyg_ErrNo
|
cma230_serial_lookup(struct cyg_devtab_entry **tab,
|
cma230_serial_lookup(struct cyg_devtab_entry **tab,
|
struct cyg_devtab_entry *sub_tab,
|
struct cyg_devtab_entry *sub_tab,
|
const char *name)
|
const char *name)
|
{
|
{
|
serial_channel *chan = (serial_channel *)(*tab)->priv;
|
serial_channel *chan = (serial_channel *)(*tab)->priv;
|
(chan->callbacks->serial_init)(chan); // Really only required for interrupt driven devices
|
(chan->callbacks->serial_init)(chan); // Really only required for interrupt driven devices
|
return ENOERR;
|
return ENOERR;
|
}
|
}
|
|
|
// Send a character to the device output buffer.
|
// Send a character to the device output buffer.
|
// Return 'true' if character is sent to device
|
// Return 'true' if character is sent to device
|
static bool
|
static bool
|
cma230_serial_putc(serial_channel *chan, unsigned char c)
|
cma230_serial_putc(serial_channel *chan, unsigned char c)
|
{
|
{
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
if (port->lsr & LSR_THE) {
|
if (port->lsr & LSR_THE) {
|
// Transmit buffer is empty
|
// Transmit buffer is empty
|
port->thr = c;
|
port->thr = c;
|
return true;
|
return true;
|
} else {
|
} else {
|
// No space
|
// No space
|
return false;
|
return false;
|
}
|
}
|
}
|
}
|
|
|
// Fetch a character from the device input buffer, waiting if necessary
|
// Fetch a character from the device input buffer, waiting if necessary
|
static unsigned char
|
static unsigned char
|
cma230_serial_getc(serial_channel *chan)
|
cma230_serial_getc(serial_channel *chan)
|
{
|
{
|
unsigned char c;
|
unsigned char c;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
while ((port->lsr & LSR_RSR) == 0) ; // Wait for char
|
while ((port->lsr & LSR_RSR) == 0) ; // Wait for char
|
c = port->rhr;
|
c = port->rhr;
|
return c;
|
return c;
|
}
|
}
|
|
|
// Set up the device characteristics; baud rate, etc.
|
// Set up the device characteristics; baud rate, etc.
|
static Cyg_ErrNo
|
static Cyg_ErrNo
|
cma230_serial_set_config(serial_channel *chan, cyg_uint32 key,
|
cma230_serial_set_config(serial_channel *chan, cyg_uint32 key,
|
const void *xbuf, cyg_uint32 *len)
|
const void *xbuf, cyg_uint32 *len)
|
{
|
{
|
switch (key) {
|
switch (key) {
|
case CYG_IO_SET_CONFIG_SERIAL_INFO:
|
case CYG_IO_SET_CONFIG_SERIAL_INFO:
|
{
|
{
|
cyg_serial_info_t *config = (cyg_serial_info_t *)xbuf;
|
cyg_serial_info_t *config = (cyg_serial_info_t *)xbuf;
|
if ( *len < sizeof(cyg_serial_info_t) ) {
|
if ( *len < sizeof(cyg_serial_info_t) ) {
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
*len = sizeof(cyg_serial_info_t);
|
*len = sizeof(cyg_serial_info_t);
|
if ( true != cma230_serial_config_port(chan, config, false) )
|
if ( true != cma230_serial_config_port(chan, config, false) )
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
break;
|
break;
|
default:
|
default:
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
return ENOERR;
|
return ENOERR;
|
}
|
}
|
|
|
// Enable the transmitter on the device
|
// Enable the transmitter on the device
|
static void
|
static void
|
cma230_serial_start_xmit(serial_channel *chan)
|
cma230_serial_start_xmit(serial_channel *chan)
|
{
|
{
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
port->ier |= IER_XMT; // Enable xmit interrupt
|
port->ier |= IER_XMT; // Enable xmit interrupt
|
}
|
}
|
|
|
// Disable the transmitter on the device
|
// Disable the transmitter on the device
|
static void
|
static void
|
cma230_serial_stop_xmit(serial_channel *chan)
|
cma230_serial_stop_xmit(serial_channel *chan)
|
{
|
{
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
port->ier &= ~IER_XMT; // Disable xmit interrupt
|
port->ier &= ~IER_XMT; // Disable xmit interrupt
|
}
|
}
|
|
|
// Serial I/O - low level interrupt handler (ISR)
|
// Serial I/O - low level interrupt handler (ISR)
|
static cyg_uint32
|
static cyg_uint32
|
cma230_serial_ISR(cyg_vector_t vector, cyg_addrword_t data)
|
cma230_serial_ISR(cyg_vector_t vector, cyg_addrword_t data)
|
{
|
{
|
serial_channel *chan = (serial_channel *)data;
|
serial_channel *chan = (serial_channel *)data;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cyg_drv_interrupt_mask(cma230_chan->int_num);
|
cyg_drv_interrupt_mask(cma230_chan->int_num);
|
cyg_drv_interrupt_acknowledge(cma230_chan->int_num);
|
cyg_drv_interrupt_acknowledge(cma230_chan->int_num);
|
return CYG_ISR_CALL_DSR; // Cause DSR to be run
|
return CYG_ISR_CALL_DSR; // Cause DSR to be run
|
}
|
}
|
|
|
// Serial I/O - high level interrupt handler (DSR)
|
// Serial I/O - high level interrupt handler (DSR)
|
static void
|
static void
|
cma230_serial_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
|
cma230_serial_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
|
{
|
{
|
serial_channel *chan = (serial_channel *)data;
|
serial_channel *chan = (serial_channel *)data;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
cma230_serial_info *cma230_chan = (cma230_serial_info *)chan->dev_priv;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
volatile struct serial_port *port = (volatile struct serial_port *)cma230_chan->base;
|
unsigned char isr;
|
unsigned char isr;
|
isr = port->isr & 0x0E;
|
isr = port->isr & 0x0E;
|
if (isr == ISR_Tx) {
|
if (isr == ISR_Tx) {
|
(chan->callbacks->xmt_char)(chan);
|
(chan->callbacks->xmt_char)(chan);
|
} else if (isr == ISR_Rx) {
|
} else if (isr == ISR_Rx) {
|
(chan->callbacks->rcv_char)(chan, port->rhr);
|
(chan->callbacks->rcv_char)(chan, port->rhr);
|
}
|
}
|
cyg_drv_interrupt_unmask(cma230_chan->int_num);
|
cyg_drv_interrupt_unmask(cma230_chan->int_num);
|
}
|
}
|
#endif
|
#endif
|
|
|