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:
parent
03731d776c
commit
2113099e49
173
src/lib/xmodem.c
173
src/lib/xmodem.c
|
@ -1,173 +0,0 @@
|
|||
/*
|
||||
Copyright 2006 Arastra, Inc.
|
||||
Copyright 2001, 2002 Georges Menie (www.menie.org)
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <string.h>
|
||||
#include <delay.h>
|
||||
#include <uart8250.h>
|
||||
|
||||
static int _inbyte(int msec)
|
||||
{
|
||||
while (!uart8250_can_rx_byte(CONFIG_TTYS0_BASE)) {
|
||||
udelay(1000);
|
||||
if (msec-- <= 0)
|
||||
return -1;
|
||||
}
|
||||
return uart8250_rx_byte(CONFIG_TTYS0_BASE);
|
||||
}
|
||||
|
||||
static void _outbyte(unsigned char c)
|
||||
{
|
||||
uart8250_tx_byte(CONFIG_TTYS0_BASE, c);
|
||||
}
|
||||
|
||||
static unsigned short crc16_ccitt(const unsigned char *buf, int sz)
|
||||
{
|
||||
unsigned short crc = 0;
|
||||
while (--sz >= 0) {
|
||||
int i;
|
||||
crc ^= (unsigned short) *buf++ << 8;
|
||||
for (i = 0; i < 8; i++)
|
||||
if (crc & 0x8000)
|
||||
crc = crc << 1 ^ 0x1021;
|
||||
else
|
||||
crc <<= 1;
|
||||
}
|
||||
return crc;
|
||||
}
|
||||
|
||||
#define SOH 0x01
|
||||
#define STX 0x02
|
||||
#define EOT 0x04
|
||||
#define ACK 0x06
|
||||
#define NAK 0x15
|
||||
#define CAN 0x18
|
||||
#define CTRLZ 0x1A
|
||||
|
||||
#define DLY_1S 1000
|
||||
#define MAXRETRANS 25
|
||||
|
||||
static int check(int crc, const unsigned char *buf, int sz)
|
||||
{
|
||||
if (crc) {
|
||||
unsigned short crc = crc16_ccitt(buf, sz);
|
||||
unsigned short tcrc = (buf[sz]<<8)+buf[sz+1];
|
||||
if (crc == tcrc)
|
||||
return 1;
|
||||
}
|
||||
else {
|
||||
int i;
|
||||
unsigned char cks = 0;
|
||||
for (i = 0; i < sz; ++i) {
|
||||
cks += buf[i];
|
||||
}
|
||||
if (cks == buf[sz])
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void flushinput(void)
|
||||
{
|
||||
while (_inbyte(((DLY_1S)*3)>>1) >= 0)
|
||||
;
|
||||
}
|
||||
|
||||
int xmodemReceive(unsigned char *dest, int destsz)
|
||||
{
|
||||
unsigned char xbuff[1030]; /* 1024 for XModem 1k + 3 head chars + 2 crc + nul */
|
||||
unsigned char *p;
|
||||
int bufsz, crc = 0;
|
||||
unsigned char trychar = 'C';
|
||||
unsigned char packetno = 1;
|
||||
int i, c, len = 0;
|
||||
int retry, retrans = MAXRETRANS;
|
||||
|
||||
for(;;) {
|
||||
for( retry = 0; retry < 16; ++retry) {
|
||||
if (trychar) _outbyte(trychar);
|
||||
if ((c = _inbyte((DLY_1S)<<1)) >= 0) {
|
||||
switch (c) {
|
||||
case SOH:
|
||||
bufsz = 128;
|
||||
goto start_recv;
|
||||
case STX:
|
||||
bufsz = 1024;
|
||||
goto start_recv;
|
||||
case EOT:
|
||||
flushinput();
|
||||
_outbyte(ACK);
|
||||
return len; /* normal end */
|
||||
case CAN:
|
||||
if ((c = _inbyte(DLY_1S)) == CAN) {
|
||||
flushinput();
|
||||
_outbyte(ACK);
|
||||
return -1; /* canceled by remote */
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (trychar == 'C') { trychar = NAK; continue; }
|
||||
flushinput();
|
||||
_outbyte(CAN);
|
||||
_outbyte(CAN);
|
||||
_outbyte(CAN);
|
||||
return -2; /* sync error */
|
||||
|
||||
start_recv:
|
||||
if (trychar == 'C') crc = 1;
|
||||
trychar = 0;
|
||||
p = xbuff;
|
||||
*p++ = c;
|
||||
for (i = 0; i < (bufsz+(crc?1:0)+3); ++i) {
|
||||
if ((c = _inbyte(DLY_1S)) < 0) goto reject;
|
||||
*p++ = c;
|
||||
}
|
||||
|
||||
if (xbuff[1] == (unsigned char)(~xbuff[2]) &&
|
||||
(xbuff[1] == packetno || xbuff[1] == (unsigned char)packetno-1) &&
|
||||
check(crc, &xbuff[3], bufsz)) {
|
||||
if (xbuff[1] == packetno) {
|
||||
register int count = destsz - len;
|
||||
if (count > bufsz) count = bufsz;
|
||||
if (count > 0) {
|
||||
memcpy (&dest[len], &xbuff[3], count);
|
||||
len += count;
|
||||
}
|
||||
++packetno;
|
||||
retrans = MAXRETRANS+1;
|
||||
}
|
||||
if (--retrans <= 0) {
|
||||
flushinput();
|
||||
_outbyte(CAN);
|
||||
_outbyte(CAN);
|
||||
_outbyte(CAN);
|
||||
return -3; /* too many retry error */
|
||||
}
|
||||
_outbyte(ACK);
|
||||
continue;
|
||||
}
|
||||
reject:
|
||||
flushinput();
|
||||
_outbyte(NAK);
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue