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398 lines
14 KiB
398 lines
14 KiB
/* $Id: hysdn_boot.c,v 1.4.6.4 2001/09/23 22:24:54 kai Exp $
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*
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* Linux driver for HYSDN cards
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* specific routines for booting and pof handling
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*
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* Author Werner Cornelius (werner@titro.de) for Hypercope GmbH
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* Copyright 1999 by Werner Cornelius (werner@titro.de)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <asm/uaccess.h>
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#include "hysdn_defs.h"
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#include "hysdn_pof.h"
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/********************************/
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/* defines for pof read handler */
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/********************************/
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#define POF_READ_FILE_HEAD 0
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#define POF_READ_TAG_HEAD 1
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#define POF_READ_TAG_DATA 2
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/************************************************************/
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/* definition of boot specific data area. This data is only */
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/* needed during boot and so allocated dynamically. */
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/************************************************************/
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struct boot_data {
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unsigned short Cryptor; /* for use with Decrypt function */
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unsigned short Nrecs; /* records remaining in file */
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unsigned char pof_state;/* actual state of read handler */
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unsigned char is_crypted;/* card data is crypted */
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int BufSize; /* actual number of bytes bufferd */
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int last_error; /* last occurred error */
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unsigned short pof_recid;/* actual pof recid */
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unsigned long pof_reclen;/* total length of pof record data */
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unsigned long pof_recoffset;/* actual offset inside pof record */
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union {
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unsigned char BootBuf[BOOT_BUF_SIZE];/* buffer as byte count */
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tPofRecHdr PofRecHdr; /* header for actual record/chunk */
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tPofFileHdr PofFileHdr; /* header from POF file */
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tPofTimeStamp PofTime; /* time information */
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} buf;
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};
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/*****************************************************/
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/* start decryption of successive POF file chuncks. */
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/* */
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/* to be called at start of POF file reading, */
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/* before starting any decryption on any POF record. */
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/*****************************************************/
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static void
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StartDecryption(struct boot_data *boot)
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{
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boot->Cryptor = CRYPT_STARTTERM;
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} /* StartDecryption */
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/***************************************************************/
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/* decrypt complete BootBuf */
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/* NOTE: decryption must be applied to all or none boot tags - */
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/* to HI and LO boot loader and (all) seq tags, because */
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/* global Cryptor is started for whole POF. */
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/***************************************************************/
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static void
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DecryptBuf(struct boot_data *boot, int cnt)
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{
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unsigned char *bufp = boot->buf.BootBuf;
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while (cnt--) {
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boot->Cryptor = (boot->Cryptor >> 1) ^ ((boot->Cryptor & 1U) ? CRYPT_FEEDTERM : 0);
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*bufp++ ^= (unsigned char)boot->Cryptor;
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}
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} /* DecryptBuf */
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/********************************************************************************/
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/* pof_handle_data executes the required actions dependent on the active record */
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/* id. If successful 0 is returned, a negative value shows an error. */
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/********************************************************************************/
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static int
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pof_handle_data(hysdn_card *card, int datlen)
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{
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struct boot_data *boot = card->boot; /* pointer to boot specific data */
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long l;
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unsigned char *imgp;
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int img_len;
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/* handle the different record types */
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switch (boot->pof_recid) {
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case TAG_TIMESTMP:
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if (card->debug_flags & LOG_POF_RECORD)
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hysdn_addlog(card, "POF created %s", boot->buf.PofTime.DateTimeText);
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break;
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case TAG_CBOOTDTA:
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DecryptBuf(boot, datlen); /* we need to encrypt the buffer */
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case TAG_BOOTDTA:
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if (card->debug_flags & LOG_POF_RECORD)
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hysdn_addlog(card, "POF got %s len=%d offs=0x%lx",
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(boot->pof_recid == TAG_CBOOTDTA) ? "CBOOTDATA" : "BOOTDTA",
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datlen, boot->pof_recoffset);
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if (boot->pof_reclen != POF_BOOT_LOADER_TOTAL_SIZE) {
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boot->last_error = EPOF_BAD_IMG_SIZE; /* invalid length */
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return (boot->last_error);
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}
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imgp = boot->buf.BootBuf; /* start of buffer */
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img_len = datlen; /* maximum length to transfer */
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l = POF_BOOT_LOADER_OFF_IN_PAGE -
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(boot->pof_recoffset & (POF_BOOT_LOADER_PAGE_SIZE - 1));
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if (l > 0) {
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/* buffer needs to be truncated */
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imgp += l; /* advance pointer */
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img_len -= l; /* adjust len */
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}
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/* at this point no special handling for data wrapping over buffer */
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/* is necessary, because the boot image always will be adjusted to */
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/* match a page boundary inside the buffer. */
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/* The buffer for the boot image on the card is filled in 2 cycles */
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/* first the 1024 hi-words are put in the buffer, then the low 1024 */
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/* word are handled in the same way with different offset. */
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if (img_len > 0) {
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/* data available for copy */
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if ((boot->last_error =
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card->writebootimg(card, imgp,
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(boot->pof_recoffset > POF_BOOT_LOADER_PAGE_SIZE) ? 2 : 0)) < 0)
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return (boot->last_error);
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}
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break; /* end of case boot image hi/lo */
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case TAG_CABSDATA:
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DecryptBuf(boot, datlen); /* we need to encrypt the buffer */
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case TAG_ABSDATA:
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if (card->debug_flags & LOG_POF_RECORD)
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hysdn_addlog(card, "POF got %s len=%d offs=0x%lx",
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(boot->pof_recid == TAG_CABSDATA) ? "CABSDATA" : "ABSDATA",
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datlen, boot->pof_recoffset);
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if ((boot->last_error = card->writebootseq(card, boot->buf.BootBuf, datlen)) < 0)
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return (boot->last_error); /* error writing data */
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if (boot->pof_recoffset + datlen >= boot->pof_reclen)
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return (card->waitpofready(card)); /* data completely spooled, wait for ready */
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break; /* end of case boot seq data */
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default:
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if (card->debug_flags & LOG_POF_RECORD)
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hysdn_addlog(card, "POF got data(id=0x%lx) len=%d offs=0x%lx", boot->pof_recid,
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datlen, boot->pof_recoffset);
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break; /* simply skip record */
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} /* switch boot->pof_recid */
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return (0);
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} /* pof_handle_data */
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/******************************************************************************/
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/* pof_write_buffer is called when the buffer has been filled with the needed */
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/* number of data bytes. The number delivered is additionally supplied for */
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/* verification. The functions handles the data and returns the needed number */
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/* of bytes for the next action. If the returned value is 0 or less an error */
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/* occurred and booting must be aborted. */
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/******************************************************************************/
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int
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pof_write_buffer(hysdn_card *card, int datlen)
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{
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struct boot_data *boot = card->boot; /* pointer to boot specific data */
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if (!boot)
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return (-EFAULT); /* invalid call */
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if (boot->last_error < 0)
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return (boot->last_error); /* repeated error */
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if (card->debug_flags & LOG_POF_WRITE)
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hysdn_addlog(card, "POF write: got %d bytes ", datlen);
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switch (boot->pof_state) {
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case POF_READ_FILE_HEAD:
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if (card->debug_flags & LOG_POF_WRITE)
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hysdn_addlog(card, "POF write: checking file header");
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if (datlen != sizeof(tPofFileHdr)) {
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boot->last_error = -EPOF_INTERNAL;
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break;
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}
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if (boot->buf.PofFileHdr.Magic != TAGFILEMAGIC) {
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boot->last_error = -EPOF_BAD_MAGIC;
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break;
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}
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/* Setup the new state and vars */
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boot->Nrecs = (unsigned short)(boot->buf.PofFileHdr.N_PofRecs); /* limited to 65535 */
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boot->pof_state = POF_READ_TAG_HEAD; /* now start with single tags */
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boot->last_error = sizeof(tPofRecHdr); /* new length */
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break;
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case POF_READ_TAG_HEAD:
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if (card->debug_flags & LOG_POF_WRITE)
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hysdn_addlog(card, "POF write: checking tag header");
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if (datlen != sizeof(tPofRecHdr)) {
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boot->last_error = -EPOF_INTERNAL;
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break;
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}
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boot->pof_recid = boot->buf.PofRecHdr.PofRecId; /* actual pof recid */
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boot->pof_reclen = boot->buf.PofRecHdr.PofRecDataLen; /* total length */
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boot->pof_recoffset = 0; /* no starting offset */
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if (card->debug_flags & LOG_POF_RECORD)
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hysdn_addlog(card, "POF: got record id=0x%lx length=%ld ",
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boot->pof_recid, boot->pof_reclen);
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boot->pof_state = POF_READ_TAG_DATA; /* now start with tag data */
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if (boot->pof_reclen < BOOT_BUF_SIZE)
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boot->last_error = boot->pof_reclen; /* limit size */
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else
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boot->last_error = BOOT_BUF_SIZE; /* maximum */
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if (!boot->last_error) { /* no data inside record */
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boot->pof_state = POF_READ_TAG_HEAD; /* now start with single tags */
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boot->last_error = sizeof(tPofRecHdr); /* new length */
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}
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break;
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case POF_READ_TAG_DATA:
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if (card->debug_flags & LOG_POF_WRITE)
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hysdn_addlog(card, "POF write: getting tag data");
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if (datlen != boot->last_error) {
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boot->last_error = -EPOF_INTERNAL;
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break;
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}
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if ((boot->last_error = pof_handle_data(card, datlen)) < 0)
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return (boot->last_error); /* an error occurred */
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boot->pof_recoffset += datlen;
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if (boot->pof_recoffset >= boot->pof_reclen) {
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boot->pof_state = POF_READ_TAG_HEAD; /* now start with single tags */
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boot->last_error = sizeof(tPofRecHdr); /* new length */
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} else {
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if (boot->pof_reclen - boot->pof_recoffset < BOOT_BUF_SIZE)
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boot->last_error = boot->pof_reclen - boot->pof_recoffset; /* limit size */
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else
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boot->last_error = BOOT_BUF_SIZE; /* maximum */
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}
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break;
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default:
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boot->last_error = -EPOF_INTERNAL; /* unknown state */
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break;
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} /* switch (boot->pof_state) */
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return (boot->last_error);
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} /* pof_write_buffer */
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/*******************************************************************************/
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/* pof_write_open is called when an open for boot on the cardlog device occurs. */
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/* The function returns the needed number of bytes for the next operation. If */
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/* the returned number is less or equal 0 an error specified by this code */
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/* occurred. Additionally the pointer to the buffer data area is set on success */
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/*******************************************************************************/
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int
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pof_write_open(hysdn_card *card, unsigned char **bufp)
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{
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struct boot_data *boot; /* pointer to boot specific data */
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if (card->boot) {
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if (card->debug_flags & LOG_POF_OPEN)
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hysdn_addlog(card, "POF open: already opened for boot");
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return (-ERR_ALREADY_BOOT); /* boot already active */
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}
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/* error no mem available */
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if (!(boot = kzalloc(sizeof(struct boot_data), GFP_KERNEL))) {
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if (card->debug_flags & LOG_MEM_ERR)
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hysdn_addlog(card, "POF open: unable to allocate mem");
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return (-EFAULT);
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}
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card->boot = boot;
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card->state = CARD_STATE_BOOTING;
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card->stopcard(card); /* first stop the card */
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if (card->testram(card)) {
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if (card->debug_flags & LOG_POF_OPEN)
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hysdn_addlog(card, "POF open: DPRAM test failure");
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boot->last_error = -ERR_BOARD_DPRAM;
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card->state = CARD_STATE_BOOTERR; /* show boot error */
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return (boot->last_error);
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}
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boot->BufSize = 0; /* Buffer is empty */
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boot->pof_state = POF_READ_FILE_HEAD; /* read file header */
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StartDecryption(boot); /* if POF File should be encrypted */
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if (card->debug_flags & LOG_POF_OPEN)
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hysdn_addlog(card, "POF open: success");
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*bufp = boot->buf.BootBuf; /* point to buffer */
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return (sizeof(tPofFileHdr));
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} /* pof_write_open */
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/********************************************************************************/
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/* pof_write_close is called when an close of boot on the cardlog device occurs. */
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/* The return value must be 0 if everything has happened as desired. */
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/********************************************************************************/
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int
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pof_write_close(hysdn_card *card)
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{
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struct boot_data *boot = card->boot; /* pointer to boot specific data */
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if (!boot)
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return (-EFAULT); /* invalid call */
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card->boot = NULL; /* no boot active */
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kfree(boot);
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if (card->state == CARD_STATE_RUN)
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card->set_errlog_state(card, 1); /* activate error log */
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if (card->debug_flags & LOG_POF_OPEN)
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hysdn_addlog(card, "POF close: success");
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return (0);
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} /* pof_write_close */
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/*********************************************************************************/
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/* EvalSysrTokData checks additional records delivered with the Sysready Message */
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/* when POF has been booted. A return value of 0 is used if no error occurred. */
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/*********************************************************************************/
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int
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EvalSysrTokData(hysdn_card *card, unsigned char *cp, int len)
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{
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u_char *p;
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u_char crc;
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if (card->debug_flags & LOG_POF_RECORD)
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hysdn_addlog(card, "SysReady Token data length %d", len);
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if (len < 2) {
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hysdn_addlog(card, "SysReady Token Data to short");
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return (1);
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}
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for (p = cp, crc = 0; p < (cp + len - 2); p++)
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if ((crc & 0x80))
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crc = (((u_char) (crc << 1)) + 1) + *p;
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else
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crc = ((u_char) (crc << 1)) + *p;
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crc = ~crc;
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if (crc != *(cp + len - 1)) {
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hysdn_addlog(card, "SysReady Token Data invalid CRC");
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return (1);
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}
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len--; /* don't check CRC byte */
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while (len > 0) {
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if (*cp == SYSR_TOK_END)
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return (0); /* End of Token stream */
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if (len < (*(cp + 1) + 2)) {
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hysdn_addlog(card, "token 0x%x invalid length %d", *cp, *(cp + 1));
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return (1);
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}
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switch (*cp) {
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case SYSR_TOK_B_CHAN: /* 1 */
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if (*(cp + 1) != 1)
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return (1); /* length invalid */
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card->bchans = *(cp + 2);
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break;
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case SYSR_TOK_FAX_CHAN: /* 2 */
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if (*(cp + 1) != 1)
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return (1); /* length invalid */
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card->faxchans = *(cp + 2);
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break;
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case SYSR_TOK_MAC_ADDR: /* 3 */
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if (*(cp + 1) != 6)
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return (1); /* length invalid */
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memcpy(card->mac_addr, cp + 2, 6);
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break;
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default:
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hysdn_addlog(card, "unknown token 0x%02x length %d", *cp, *(cp + 1));
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break;
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}
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len -= (*(cp + 1) + 2); /* adjust len */
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cp += (*(cp + 1) + 2); /* and pointer */
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}
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hysdn_addlog(card, "no end token found");
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return (1);
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} /* EvalSysrTokData */
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