//==========================================================================////      io/serial/arm/edb7xxx_serial.c////      Cirrus Logic EDB7XXX Serial I/O Interface Module (interrupt driven)////==========================================================================//####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:     EDB7XXX Serial I/O module (interrupt driven version)// Description: ////####DESCRIPTIONEND####////==========================================================================#include <pkgconf/system.h>#include <pkgconf/io_serial.h>#include <pkgconf/io.h>#include <cyg/io/io.h>#include <cyg/hal/hal_intr.h>#include <cyg/io/devtab.h>#include <cyg/io/serial.h>#include <cyg/infra/diag.h>#ifdef CYGPKG_IO_SERIAL_ARM_EDB7XXX#include "edb7xxx_serial.h"typedef struct edb7xxx_serial_info {    CYG_ADDRWORD   data,                      // Pointer to data register                   control,                   // Pointer to baud rate/line control register                   stat,                      // Pointer to system flags for this port                   syscon;                    // Pointer to system control for this port    CYG_WORD       tx_int_num,                // Transmit interrupt number                   rx_int_num,                // Receive interrupt number                   ms_int_num;                // Modem Status Change interrupt number    cyg_interrupt  serial_tx_interrupt,                    serial_rx_interrupt,                    serial_ms_interrupt;    cyg_handle_t   serial_tx_interrupt_handle,                    serial_rx_interrupt_handle,                    serial_ms_interrupt_handle;    bool           tx_enabled;} edb7xxx_serial_info;static bool edb7xxx_serial_init(struct cyg_devtab_entry *tab);static bool edb7xxx_serial_putc(serial_channel *chan, unsigned char c);static Cyg_ErrNo edb7xxx_serial_lookup(struct cyg_devtab_entry **tab,                                    struct cyg_devtab_entry *sub_tab,                                   const char *name);static unsigned char edb7xxx_serial_getc(serial_channel *chan);static Cyg_ErrNo edb7xxx_serial_set_config(serial_channel *chan, cyg_uint32 key,                                           const void *xbuf, cyg_uint32 *len);static void edb7xxx_serial_start_xmit(serial_channel *chan);static void edb7xxx_serial_stop_xmit(serial_channel *chan);static cyg_uint32 edb7xxx_serial_tx_ISR(cyg_vector_t vector, cyg_addrword_t data);static void       edb7xxx_serial_tx_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);static cyg_uint32 edb7xxx_serial_rx_ISR(cyg_vector_t vector, cyg_addrword_t data);static void       edb7xxx_serial_rx_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);static cyg_uint32 edb7xxx_serial_ms_ISR(cyg_vector_t vector, cyg_addrword_t data);static void       edb7xxx_serial_ms_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);static SERIAL_FUNS(edb7xxx_serial_funs,                    edb7xxx_serial_putc,                    edb7xxx_serial_getc,                   edb7xxx_serial_set_config,                   edb7xxx_serial_start_xmit,                   edb7xxx_serial_stop_xmit    );#ifdef CYGPKG_IO_SERIAL_ARM_EDB7XXX_SERIAL1static edb7xxx_serial_info edb7xxx_serial_info1 = {UARTDR1, // Data register                                                 UBLCR1,  // Port control                                                 SYSFLG1, // Status                                                 SYSCON1, // System config                                                 CYGNUM_HAL_INTERRUPT_UTXINT1, // Tx interrupt                                                 CYGNUM_HAL_INTERRUPT_URXINT1, // Rx interrupt                                                 0 /*CYGNUM_HAL_INTERRUPT_UMSINT*/}; // Modem control#if CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL1_BUFSIZE > 0static unsigned char edb7xxx_serial_out_buf1[CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL1_BUFSIZE];static unsigned char edb7xxx_serial_in_buf1[CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL1_BUFSIZE];static SERIAL_CHANNEL_USING_INTERRUPTS(edb7xxx_serial_channel1,                                       edb7xxx_serial_funs,                                        edb7xxx_serial_info1,                                       CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL1_BAUD),                                       CYG_SERIAL_STOP_DEFAULT,                                       CYG_SERIAL_PARITY_DEFAULT,                                       CYG_SERIAL_WORD_LENGTH_DEFAULT,                                       CYG_SERIAL_FLAGS_DEFAULT,                                       &edb7xxx_serial_out_buf1[0], sizeof(edb7xxx_serial_out_buf1),                                       &edb7xxx_serial_in_buf1[0], sizeof(edb7xxx_serial_in_buf1)    );#elsestatic SERIAL_CHANNEL(edb7xxx_serial_channel1,                      edb7xxx_serial_funs,                       edb7xxx_serial_info1,                      CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL1_BAUD),                      CYG_SERIAL_STOP_DEFAULT,                      CYG_SERIAL_PARITY_DEFAULT,                      CYG_SERIAL_WORD_LENGTH_DEFAULT,                      CYG_SERIAL_FLAGS_DEFAULT    );#endifDEVTAB_ENTRY(edb7xxx_serial_io1,              CYGDAT_IO_SERIAL_ARM_EDB7XXX_SERIAL1_NAME,             0,                     // Does not depend on a lower level interface             &cyg_io_serial_devio,              edb7xxx_serial_init,              edb7xxx_serial_lookup,     // Serial driver may need initializing             &edb7xxx_serial_channel1    );#endif //  CYGPKG_IO_SERIAL_ARM_EDB7XXX_SERIAL2#ifdef CYGPKG_IO_SERIAL_ARM_EDB7XXX_SERIAL2static edb7xxx_serial_info edb7xxx_serial_info2 = {UARTDR2, // Data register                                                 UBLCR2,  // Port control                                                 SYSFLG2, // Status                                                 SYSCON2, // System config                                                 CYGNUM_HAL_INTERRUPT_UTXINT2, // Tx interrupt                                                 CYGNUM_HAL_INTERRUPT_URXINT2, // Rx interrupt                                                 0};      // No modem control#if CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL2_BUFSIZE > 0static unsigned char edb7xxx_serial_out_buf2[CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL2_BUFSIZE];static unsigned char edb7xxx_serial_in_buf2[CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL2_BUFSIZE];static SERIAL_CHANNEL_USING_INTERRUPTS(edb7xxx_serial_channel2,                                       edb7xxx_serial_funs,                                        edb7xxx_serial_info2,                                       CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL2_BAUD),                                       CYG_SERIAL_STOP_DEFAULT,                                       CYG_SERIAL_PARITY_DEFAULT,                                       CYG_SERIAL_WORD_LENGTH_DEFAULT,                                       CYG_SERIAL_FLAGS_DEFAULT,                                       &edb7xxx_serial_out_buf2[0], sizeof(edb7xxx_serial_out_buf2),                                       &edb7xxx_serial_in_buf2[0], sizeof(edb7xxx_serial_in_buf2)    );#elsestatic SERIAL_CHANNEL(edb7xxx_serial_channel2,                      edb7xxx_serial_funs,                       edb7xxx_serial_info2,                      CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_EDB7XXX_SERIAL2_BAUD),                      CYG_SERIAL_STOP_DEFAULT,                      CYG_SERIAL_PARITY_DEFAULT,                      CYG_SERIAL_WORD_LENGTH_DEFAULT,                      CYG_SERIAL_FLAGS_DEFAULT    );#endifDEVTAB_ENTRY(edb7xxx_serial_io2,              CYGDAT_IO_SERIAL_ARM_EDB7XXX_SERIAL2_NAME,             0,                     // Does not depend on a lower level interface             &cyg_io_serial_devio,              edb7xxx_serial_init,              edb7xxx_serial_lookup,     // Serial driver may need initializing             &edb7xxx_serial_channel2    );#endif //  CYGPKG_IO_SERIAL_ARM_EDB7XXX_SERIAL2// Internal function to actually configure the hardware to desired baud rate, etc.static booledb7xxx_serial_config_port(serial_channel *chan, cyg_serial_info_t *new_config, bool init){    edb7xxx_serial_info *edb7xxx_chan = (edb7xxx_serial_info *)chan->dev_priv;    volatile cyg_uint32 *syscon = (volatile cyg_uint32 *)edb7xxx_chan->syscon;    volatile cyg_uint32 *blcfg = (volatile cyg_uint32 *)edb7xxx_chan->control;    unsigned int baud_divisor = select_baud[new_config->baud];    cyg_uint32 _lcr;    if (baud_divisor == 0) return false;    // Disable port interrupts while changing hardware    _lcr = select_word_length[new_config->word_length - CYGNUM_SERIAL_WORD_LENGTH_5] |