//==========================================================================////      io/serial/arm/ebsa285_serial.c////      ARM EBSA285 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):   hmt// Contributors:  hmt// Date:        1999-07-26// Purpose:     EBSA285 Serial I/O module (interrupt driven version)// Description: ////####DESCRIPTIONEND####////==========================================================================#include <pkgconf/system.h>#include <pkgconf/io_serial.h>#include <pkgconf/io.h>#ifdef CYGPKG_IO_SERIAL_ARM_EBSA285#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>#include <cyg/hal/hal_ebsa285.h>         // Hardware definitions// ------------------------------------------------------------------------// Baud rates and the like, table-driven setup#define FCLK_MHZ 50struct _baud {    unsigned char divisor_high, divisor_low;};// The indexing of this table must match the enum in serialio.h// The arithmetic is (clock/4)/(baud * 16) - 1#define NONE {0,0}const static struct _baud bauds[] = {#if (FCLK_MHZ == 50)    NONE,                  // unused    NONE,                  // 50    NONE,                  // 75    NONE,                  // 110    NONE,                  // 134.5    NONE,                  // 150    NONE,                  // 200    { 0xA, 0x2B },         // 300   2603  = 0x0A2B    { 0x5, 0x15 },         // 600   1301  = 0x0515    { 0x2, 0x8A },         // 1200  650   = 0x028A    { 0x1, 0xB1 },         // 1800  433   = 0x01B1    { 0x1, 0x45 },         // 2400  325   = 0x0145    { 0x0, 0xD8 },         // 3600  216   = 0x00D8    { 0x0, 0xA2 },         // 4800  162   = 0x00A2    { 0x0, 0x6B },         // 7200  107   = 0x006B    { 0x0, 0x50 },         // 9600  80    = 0x0050    { 0x0, 0x35 },         // 14400 53    = 0x0035    { 0x0, 0x28 },         // 19200 40    = 0x0028    { 0x0, 0x13 },         // 38400 19    = 0x0013    NONE,                  // 57600     NONE,                  // 115200    NONE                   // 230400#elif (FCLK_MHZ == 60)#error NOT SUPPORTED - these figures are more for documentation    { /*   300, */ 0xC, 0x34},                  /* 2603  = 0x0A2B */    { /*   600, */ 0x6, 0x19},                  /* 1301  = 0x0515 */    { /*  1200, */ 0x3, 0x0C},                  /* 650   = 0x028A */    { /*  2400, */ 0x1, 0x86},                  /* 325   = 0x0145 */    { /*  4800, */ 0x0, 0xC2},                  /* 162   = 0x00A2 */    { /*  9600, */ 0x0, 0x61},                  /* 80    = 0x0050 */    { /* 19200, */ 0x0, 0x30},                  /* 40    = 0x0028 */    { /* 38400, */ 0x0, 0x17},                  /* 19    = 0x0013 */#endif};static int select_word_length[] = {    SA110_UART_DATA_LENGTH_5_BITS,      // 5 bits    SA110_UART_DATA_LENGTH_6_BITS,      // 6 bits    SA110_UART_DATA_LENGTH_7_BITS,      // 7 bits    SA110_UART_DATA_LENGTH_8_BITS       // 8 bits};static int select_stop_bits[] = {    -1,                          // unused    SA110_UART_STOP_BITS_ONE,    // 1 stop bit    -1,                          // 1.5 stop bit    SA110_UART_STOP_BITS_TWO     // 2 stop bits};static int select_parity[] = {    SA110_UART_PARITY_DISABLED,                           // No parity    SA110_UART_PARITY_ENABLED | SA110_UART_PARITY_EVEN,   // Even parity    SA110_UART_PARITY_ENABLED | SA110_UART_PARITY_ODD,    // Odd parity    -1,                                                   // Mark parity    -1                                                    // Space parity};// ------------------------------------------------------------------------// some forward referencesstruct ebsa285_serial_interrupt {    CYG_WORD       int_num;    cyg_interrupt  serial_interrupt;    cyg_handle_t   serial_interrupt_handle;};typedef struct ebsa285_serial_info {    struct ebsa285_serial_interrupt rx;    struct ebsa285_serial_interrupt tx;} ebsa285_serial_info;static bool ebsa285_serial_init(struct cyg_devtab_entry *tab);static bool ebsa285_serial_putc(serial_channel *chan, unsigned char c);static Cyg_ErrNo ebsa285_serial_lookup(struct cyg_devtab_entry **tab,                                    struct cyg_devtab_entry *sub_tab,                                   const char *name);static unsigned char ebsa285_serial_getc(serial_channel *chan);static bool ebsa285_serial_set_config(serial_channel *chan, cyg_serial_info_t *config);static void ebsa285_serial_start_xmit(serial_channel *chan);static void ebsa285_serial_stop_xmit(serial_channel *chan);static cyg_uint32 ebsa285_serial_rx_ISR(cyg_vector_t vector, cyg_addrword_t data);static void       ebsa285_serial_rx_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);static cyg_uint32 ebsa285_serial_tx_ISR(cyg_vector_t vector, cyg_addrword_t data);static void       ebsa285_serial_tx_DSR(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data);static SERIAL_FUNS(ebsa285_serial_funs,                    ebsa285_serial_putc,                    ebsa285_serial_getc,                   ebsa285_serial_set_config,                   ebsa285_serial_start_xmit,                   ebsa285_serial_stop_xmit    );// ------------------------------------------------------------------------// this is dummy in config: there is only one device on the EBSA285#define CYGPKG_IO_SERIAL_ARM_EBSA285_SERIAL // so always define it#ifdef CYGPKG_IO_SERIAL_ARM_EBSA285_SERIALstatic ebsa285_serial_info ebsa285_serial_info1 = {    { CYGNUM_HAL_INTERRUPT_SERIAL_RX },    { CYGNUM_HAL_INTERRUPT_SERIAL_TX }};#if CYGNUM_IO_SERIAL_ARM_EBSA285_SERIAL_BUFSIZE > 0static unsigned char ebsa285_serial_out_buf[CYGNUM_IO_SERIAL_ARM_EBSA285_SERIAL_BUFSIZE];static unsigned char ebsa285_serial_in_buf[CYGNUM_IO_SERIAL_ARM_EBSA285_SERIAL_BUFSIZE];static SERIAL_CHANNEL_USING_INTERRUPTS(ebsa285_serial_channel,                                       ebsa285_serial_funs,                                        ebsa285_serial_info1,                                       CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_EBSA285_SERIAL_BAUD),                                       CYG_SERIAL_STOP_DEFAULT,                                       CYG_SERIAL_PARITY_DEFAULT,                                       CYG_SERIAL_WORD_LENGTH_DEFAULT,                                       CYG_SERIAL_FLAGS_DEFAULT,                                       &ebsa285_serial_out_buf[0], sizeof(ebsa285_serial_out_buf),                                       &ebsa285_serial_in_buf[0], sizeof(ebsa285_serial_in_buf)    );#elsestatic SERIAL_CHANNEL(ebsa285_serial_channel,                      ebsa285_serial_funs,                       ebsa285_serial_info1,                      CYG_SERIAL_BAUD_RATE(CYGNUM_IO_SERIAL_ARM_EBSA285_SERIAL_BAUD),                      CYG_SERIAL_STOP_DEFAULT,                      CYG_SERIAL_PARITY_DEFAULT,                      CYG_SERIAL_WORD_LENGTH_DEFAULT,                      CYG_SERIAL_FLAGS_DEFAULT    );#endifDEVTAB_ENTRY(ebsa285_serial_io,              CYGDAT_IO_SERIAL_ARM_EBSA285_SERIAL_NAME,             0,                     // Does not depend on a lower level interface             &cyg_io_serial_devio,              ebsa285_serial_init,              ebsa285_serial_lookup,     // Serial driver may need initializing             &ebsa285_serial_channel    );#endif //  CYGPKG_IO_SERIAL_ARM_EBSA285_SERIAL