[coreboot-gerrit] New patch to review for coreboot: 4aadd22 uart8250: Drop xmodem support

[Kyösti Mälkki (kyosti.malkki@gmail.com)]

Kyösti Mälkki (kyosti.malkki at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5137

-gerrit

commit 4aadd22ae0284aa57427c575d7d1a8c88105654b
Author: Kyösti Mälkki <kyosti.malkki at gmail.com>
Date:   Thu Jan 30 10:51:32 2014 +0200

    uart8250: Drop xmodem support
    
    Unused and hard-coded to use uart8250 on IO.
    
    Change-Id: I3f84c50039a450a2ae97a5fd2af89992f8567e6c
    Signed-off-by: Kyösti Mälkki <kyosti.malkki at gmail.com>
---
 src/lib/xmodem.c | 173 -------------------------------------------------------
 1 file changed, 173 deletions(-)

diff --git a/src/lib/xmodem.c b/src/lib/xmodem.c
deleted file mode 100644
index c3bb1d8..0000000
--- a/src/lib/xmodem.c
+++ /dev/null
@@ -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);
-	}
-}