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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 | /* * (C) Copyright 2002 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Marius Groeger <mgroeger@sysgo.de> * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Alex Zuepke <azu@sysgo.de> * * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) * * 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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <common.h> #include <asm/arch/pxa-regs.h> void serial_setbrg (void) { DECLARE_GLOBAL_DATA_PTR; unsigned int quot = 0; if (gd->baudrate == 1200) quot = 192; else if (gd->baudrate == 9600) quot = 96; else if (gd->baudrate == 19200) quot = 48; else if (gd->baudrate == 38400) quot = 24; else if (gd->baudrate == 57600) quot = 16; else if (gd->baudrate == 115200) quot = 8; else hang (); #ifdef CONFIG_FFUART CKEN |= CKEN6_FFUART; FFIER = 0; /* Disable for now */ FFFCR = 0; /* No fifos enabled */ /* set baud rate */ FFLCR = LCR_WLS0 | LCR_WLS1 | LCR_DLAB; FFDLL = quot & 0xff; FFDLH = quot >> 8; FFLCR = LCR_WLS0 | LCR_WLS1; FFIER = IER_UUE; /* Enable FFUART */ #elif defined(CONFIG_BTUART) CKEN |= CKEN7_BTUART; BTIER = 0; BTFCR = 0; /* set baud rate */ BTLCR = LCR_DLAB; BTDLL = quot & 0xff; BTDLH = quot >> 8; BTLCR = LCR_WLS0 | LCR_WLS1; BTIER = IER_UUE; /* Enable BFUART */ #elif defined(CONFIG_STUART) #error "Bad: not implemented yet!" #else #error "Bad: you didn't configured serial ..." #endif } /* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. * */ int serial_init (void) { serial_setbrg (); return (0); } /* * Output a single byte to the serial port. */ void serial_putc (const char c) { #ifdef CONFIG_FFUART /* wait for room in the tx FIFO on FFUART */ while ((FFLSR & LSR_TEMT) == 0); FFTHR = c; #elif defined(CONFIG_BTUART) while ((BTLSR & LSR_TEMT ) == 0 ); BTTHR = c; #elif defined(CONFIG_STUART) #endif /* If \n, also do \r */ if (c == '\n') serial_putc ('\r'); } /* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */ int serial_tstc (void) { #ifdef CONFIG_FFUART return FFLSR & LSR_DR; #elif defined(CONFIG_BTUART) return BTLSR & LSR_DR; #elif defined(CONFIG_STUART) #endif } /* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */ int serial_getc (void) { #ifdef CONFIG_FFUART while (!(FFLSR & LSR_DR)); return (char) FFRBR & 0xff; #elif defined(CONFIG_BTUART) while (!(BTLSR & LSR_DR)); return (char) BTRBR & 0xff; #elif defined(CONFIG_STUART) #endif } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } } |