uart8250: Drop xmodem support
Unused and hard-coded to use uart8250 on IO. Change-Id: I3f84c50039a450a2ae97a5fd2af89992f8567e6c Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/5137 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Kyösti Mälkki
parent
03731d776c
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2113099e49
173
src/lib/xmodem.c
173
src/lib/xmodem.c
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/*
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Copyright 2006 Arastra, Inc.
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Copyright 2001, 2002 Georges Menie (www.menie.org)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include <delay.h>
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#include <uart8250.h>
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static int _inbyte(int msec)
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{
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while (!uart8250_can_rx_byte(CONFIG_TTYS0_BASE)) {
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udelay(1000);
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if (msec-- <= 0)
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return -1;
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}
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return uart8250_rx_byte(CONFIG_TTYS0_BASE);
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}
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static void _outbyte(unsigned char c)
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{
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uart8250_tx_byte(CONFIG_TTYS0_BASE, c);
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}
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static unsigned short crc16_ccitt(const unsigned char *buf, int sz)
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{
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unsigned short crc = 0;
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while (--sz >= 0) {
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int i;
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crc ^= (unsigned short) *buf++ << 8;
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for (i = 0; i < 8; i++)
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if (crc & 0x8000)
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crc = crc << 1 ^ 0x1021;
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else
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crc <<= 1;
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}
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return crc;
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}
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#define SOH 0x01
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#define STX 0x02
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#define EOT 0x04
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#define ACK 0x06
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#define NAK 0x15
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#define CAN 0x18
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#define CTRLZ 0x1A
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#define DLY_1S 1000
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#define MAXRETRANS 25
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static int check(int crc, const unsigned char *buf, int sz)
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{
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if (crc) {
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unsigned short crc = crc16_ccitt(buf, sz);
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unsigned short tcrc = (buf[sz]<<8)+buf[sz+1];
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if (crc == tcrc)
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return 1;
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}
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else {
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int i;
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unsigned char cks = 0;
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for (i = 0; i < sz; ++i) {
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cks += buf[i];
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}
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if (cks == buf[sz])
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return 1;
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}
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return 0;
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}
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static void flushinput(void)
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{
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while (_inbyte(((DLY_1S)*3)>>1) >= 0)
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;
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}
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int xmodemReceive(unsigned char *dest, int destsz)
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{
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unsigned char xbuff[1030]; /* 1024 for XModem 1k + 3 head chars + 2 crc + nul */
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unsigned char *p;
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int bufsz, crc = 0;
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unsigned char trychar = 'C';
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unsigned char packetno = 1;
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int i, c, len = 0;
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int retry, retrans = MAXRETRANS;
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for(;;) {
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for( retry = 0; retry < 16; ++retry) {
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if (trychar) _outbyte(trychar);
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if ((c = _inbyte((DLY_1S)<<1)) >= 0) {
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switch (c) {
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case SOH:
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bufsz = 128;
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goto start_recv;
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case STX:
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bufsz = 1024;
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goto start_recv;
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case EOT:
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flushinput();
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_outbyte(ACK);
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return len; /* normal end */
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case CAN:
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if ((c = _inbyte(DLY_1S)) == CAN) {
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flushinput();
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_outbyte(ACK);
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return -1; /* canceled by remote */
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}
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break;
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default:
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break;
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}
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}
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}
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if (trychar == 'C') { trychar = NAK; continue; }
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flushinput();
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_outbyte(CAN);
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_outbyte(CAN);
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_outbyte(CAN);
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return -2; /* sync error */
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start_recv:
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if (trychar == 'C') crc = 1;
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trychar = 0;
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p = xbuff;
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*p++ = c;
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for (i = 0; i < (bufsz+(crc?1:0)+3); ++i) {
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if ((c = _inbyte(DLY_1S)) < 0) goto reject;
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*p++ = c;
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}
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if (xbuff[1] == (unsigned char)(~xbuff[2]) &&
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(xbuff[1] == packetno || xbuff[1] == (unsigned char)packetno-1) &&
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check(crc, &xbuff[3], bufsz)) {
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if (xbuff[1] == packetno) {
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register int count = destsz - len;
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if (count > bufsz) count = bufsz;
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if (count > 0) {
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memcpy (&dest[len], &xbuff[3], count);
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len += count;
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}
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++packetno;
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retrans = MAXRETRANS+1;
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}
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if (--retrans <= 0) {
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flushinput();
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_outbyte(CAN);
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_outbyte(CAN);
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_outbyte(CAN);
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return -3; /* too many retry error */
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}
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_outbyte(ACK);
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continue;
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}
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reject:
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flushinput();
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_outbyte(NAK);
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}
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}
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