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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | /* * (C) Copyright 2003 * Martin Winistoerfer, martinwinistoerfer@gmx.ch. * * See file CREDITS for list of people who contributed to this * project. * * This program 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 of * the License, or (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, */ /* * File: serial.c * * Discription: Serial interface driver for SCI1 and SCI2. * Since this code will be called from ROM use * only non-static local variables. * */ #include <common.h> #include <watchdog.h> #include <command.h> #include <mpc5xx.h> DECLARE_GLOBAL_DATA_PTR; /* * Local function prototypes */ static int ready_to_send(void); /* * Minimal global serial functions needed to use one of the SCI modules. */ int serial_init (void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; serial_setbrg(); #if defined(CONFIG_5xx_CONS_SCI1) /* 10-Bit, 1 start bit, 8 data bit, no parity, 1 stop bit */ immr->im_qsmcm.qsmcm_scc1r1 = SCI_M_10; immr->im_qsmcm.qsmcm_scc1r1 = SCI_TE | SCI_RE; #else immr->im_qsmcm.qsmcm_scc2r1 = SCI_M_10; immr->im_qsmcm.qsmcm_scc2r1 = SCI_TE | SCI_RE; #endif return 0; } void serial_putc(const char c) { volatile immap_t *immr = (immap_t *)CFG_IMMR; /* Test for completition */ if(ready_to_send()) { #if defined(CONFIG_5xx_CONS_SCI1) immr->im_qsmcm.qsmcm_sc1dr = (short)c; #else immr->im_qsmcm.qsmcm_sc2dr = (short)c; #endif if(c == '\n') { if(ready_to_send()); #if defined(CONFIG_5xx_CONS_SCI1) immr->im_qsmcm.qsmcm_sc1dr = (short)'\r'; #else immr->im_qsmcm.qsmcm_sc2dr = (short)'\r'; #endif } } } int serial_getc(void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; volatile short status; unsigned char tmp; /* New data ? */ do { #if defined(CONFIG_5xx_CONS_SCI1) status = immr->im_qsmcm.qsmcm_sc1sr; #else status = immr->im_qsmcm.qsmcm_sc2sr; #endif #if defined(CONFIG_WATCHDOG) reset_5xx_watchdog (immr); #endif } while ((status & SCI_RDRF) == 0); /* Read data */ #if defined(CONFIG_5xx_CONS_SCI1) tmp = (unsigned char)(immr->im_qsmcm.qsmcm_sc1dr & SCI_SCXDR_MK); #else tmp = (unsigned char)( immr->im_qsmcm.qsmcm_sc2dr & SCI_SCXDR_MK); #endif return tmp; } int serial_tstc() { volatile immap_t *immr = (immap_t *)CFG_IMMR; short status; /* New data character ? */ #if defined(CONFIG_5xx_CONS_SCI1) status = immr->im_qsmcm.qsmcm_sc1sr; #else status = immr->im_qsmcm.qsmcm_sc2sr; #endif return (status & SCI_RDRF); } void serial_setbrg (void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; short scxbr; /* Set baudrate */ scxbr = (gd->cpu_clk / (32 * gd->baudrate)); #if defined(CONFIG_5xx_CONS_SCI1) immr->im_qsmcm.qsmcm_scc1r0 = (scxbr & SCI_SCXBR_MK); #else immr->im_qsmcm.qsmcm_scc2r0 = (scxbr & SCI_SCXBR_MK); #endif } void serial_puts (const char *s) { while (*s) { serial_putc(*s); ++s; } } int ready_to_send(void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; volatile short status; do { #if defined(CONFIG_5xx_CONS_SCI1) status = immr->im_qsmcm.qsmcm_sc1sr; #else status = immr->im_qsmcm.qsmcm_sc2sr; #endif #if defined(CONFIG_WATCHDOG) reset_5xx_watchdog (immr); #endif } while ((status & SCI_TDRE) == 0); return 1; } |