diff options
Diffstat (limited to 'drivers/isdn/hysdn/hysdn_boot.c')
| -rw-r--r-- | drivers/isdn/hysdn/hysdn_boot.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/drivers/isdn/hysdn/hysdn_boot.c b/drivers/isdn/hysdn/hysdn_boot.c new file mode 100644 index 000000000..ba177c3a6 --- /dev/null +++ b/drivers/isdn/hysdn/hysdn_boot.c @@ -0,0 +1,400 @@ +/* $Id: hysdn_boot.c,v 1.4.6.4 2001/09/23 22:24:54 kai Exp $ + * + * Linux driver for HYSDN cards + * specific routines for booting and pof handling + * + * Author Werner Cornelius (werner@titro.de) for Hypercope GmbH + * Copyright 1999 by Werner Cornelius (werner@titro.de) + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + */ + +#include <linux/vmalloc.h> +#include <linux/slab.h> +#include <linux/uaccess.h> + +#include "hysdn_defs.h" +#include "hysdn_pof.h" + +/********************************/ +/* defines for pof read handler */ +/********************************/ +#define POF_READ_FILE_HEAD 0 +#define POF_READ_TAG_HEAD 1 +#define POF_READ_TAG_DATA 2 + +/************************************************************/ +/* definition of boot specific data area. This data is only */ +/* needed during boot and so allocated dynamically. */ +/************************************************************/ +struct boot_data { + unsigned short Cryptor; /* for use with Decrypt function */ + unsigned short Nrecs; /* records remaining in file */ + unsigned char pof_state;/* actual state of read handler */ + unsigned char is_crypted;/* card data is crypted */ + int BufSize; /* actual number of bytes bufferd */ + int last_error; /* last occurred error */ + unsigned short pof_recid;/* actual pof recid */ + unsigned long pof_reclen;/* total length of pof record data */ + unsigned long pof_recoffset;/* actual offset inside pof record */ + union { + unsigned char BootBuf[BOOT_BUF_SIZE];/* buffer as byte count */ + tPofRecHdr PofRecHdr; /* header for actual record/chunk */ + tPofFileHdr PofFileHdr; /* header from POF file */ + tPofTimeStamp PofTime; /* time information */ + } buf; +}; + +/*****************************************************/ +/* start decryption of successive POF file chuncks. */ +/* */ +/* to be called at start of POF file reading, */ +/* before starting any decryption on any POF record. */ +/*****************************************************/ +static void +StartDecryption(struct boot_data *boot) +{ + boot->Cryptor = CRYPT_STARTTERM; +} /* StartDecryption */ + + +/***************************************************************/ +/* decrypt complete BootBuf */ +/* NOTE: decryption must be applied to all or none boot tags - */ +/* to HI and LO boot loader and (all) seq tags, because */ +/* global Cryptor is started for whole POF. */ +/***************************************************************/ +static void +DecryptBuf(struct boot_data *boot, int cnt) +{ + unsigned char *bufp = boot->buf.BootBuf; + + while (cnt--) { + boot->Cryptor = (boot->Cryptor >> 1) ^ ((boot->Cryptor & 1U) ? CRYPT_FEEDTERM : 0); + *bufp++ ^= (unsigned char)boot->Cryptor; + } +} /* DecryptBuf */ + +/********************************************************************************/ +/* pof_handle_data executes the required actions dependent on the active record */ +/* id. If successful 0 is returned, a negative value shows an error. */ +/********************************************************************************/ +static int +pof_handle_data(hysdn_card *card, int datlen) +{ + struct boot_data *boot = card->boot; /* pointer to boot specific data */ + long l; + unsigned char *imgp; + int img_len; + + /* handle the different record types */ + switch (boot->pof_recid) { + + case TAG_TIMESTMP: + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "POF created %s", boot->buf.PofTime.DateTimeText); + break; + + case TAG_CBOOTDTA: + DecryptBuf(boot, datlen); /* we need to encrypt the buffer */ + /* fall through */ + case TAG_BOOTDTA: + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "POF got %s len=%d offs=0x%lx", + (boot->pof_recid == TAG_CBOOTDTA) ? "CBOOTDATA" : "BOOTDTA", + datlen, boot->pof_recoffset); + + if (boot->pof_reclen != POF_BOOT_LOADER_TOTAL_SIZE) { + boot->last_error = EPOF_BAD_IMG_SIZE; /* invalid length */ + return (boot->last_error); + } + imgp = boot->buf.BootBuf; /* start of buffer */ + img_len = datlen; /* maximum length to transfer */ + + l = POF_BOOT_LOADER_OFF_IN_PAGE - + (boot->pof_recoffset & (POF_BOOT_LOADER_PAGE_SIZE - 1)); + if (l > 0) { + /* buffer needs to be truncated */ + imgp += l; /* advance pointer */ + img_len -= l; /* adjust len */ + } + /* at this point no special handling for data wrapping over buffer */ + /* is necessary, because the boot image always will be adjusted to */ + /* match a page boundary inside the buffer. */ + /* The buffer for the boot image on the card is filled in 2 cycles */ + /* first the 1024 hi-words are put in the buffer, then the low 1024 */ + /* word are handled in the same way with different offset. */ + + if (img_len > 0) { + /* data available for copy */ + if ((boot->last_error = + card->writebootimg(card, imgp, + (boot->pof_recoffset > POF_BOOT_LOADER_PAGE_SIZE) ? 2 : 0)) < 0) + return (boot->last_error); + } + break; /* end of case boot image hi/lo */ + + case TAG_CABSDATA: + DecryptBuf(boot, datlen); /* we need to encrypt the buffer */ + /* fall through */ + case TAG_ABSDATA: + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "POF got %s len=%d offs=0x%lx", + (boot->pof_recid == TAG_CABSDATA) ? "CABSDATA" : "ABSDATA", + datlen, boot->pof_recoffset); + + if ((boot->last_error = card->writebootseq(card, boot->buf.BootBuf, datlen)) < 0) + return (boot->last_error); /* error writing data */ + + if (boot->pof_recoffset + datlen >= boot->pof_reclen) + return (card->waitpofready(card)); /* data completely spooled, wait for ready */ + + break; /* end of case boot seq data */ + + default: + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "POF got data(id=0x%lx) len=%d offs=0x%lx", boot->pof_recid, + datlen, boot->pof_recoffset); + + break; /* simply skip record */ + } /* switch boot->pof_recid */ + + return (0); +} /* pof_handle_data */ + + +/******************************************************************************/ +/* pof_write_buffer is called when the buffer has been filled with the needed */ +/* number of data bytes. The number delivered is additionally supplied for */ +/* verification. The functions handles the data and returns the needed number */ +/* of bytes for the next action. If the returned value is 0 or less an error */ +/* occurred and booting must be aborted. */ +/******************************************************************************/ +int +pof_write_buffer(hysdn_card *card, int datlen) +{ + struct boot_data *boot = card->boot; /* pointer to boot specific data */ + + if (!boot) + return (-EFAULT); /* invalid call */ + if (boot->last_error < 0) + return (boot->last_error); /* repeated error */ + + if (card->debug_flags & LOG_POF_WRITE) + hysdn_addlog(card, "POF write: got %d bytes ", datlen); + + switch (boot->pof_state) { + case POF_READ_FILE_HEAD: + if (card->debug_flags & LOG_POF_WRITE) + hysdn_addlog(card, "POF write: checking file header"); + + if (datlen != sizeof(tPofFileHdr)) { + boot->last_error = -EPOF_INTERNAL; + break; + } + if (boot->buf.PofFileHdr.Magic != TAGFILEMAGIC) { + boot->last_error = -EPOF_BAD_MAGIC; + break; + } + /* Setup the new state and vars */ + boot->Nrecs = (unsigned short)(boot->buf.PofFileHdr.N_PofRecs); /* limited to 65535 */ + boot->pof_state = POF_READ_TAG_HEAD; /* now start with single tags */ + boot->last_error = sizeof(tPofRecHdr); /* new length */ + break; + + case POF_READ_TAG_HEAD: + if (card->debug_flags & LOG_POF_WRITE) + hysdn_addlog(card, "POF write: checking tag header"); + + if (datlen != sizeof(tPofRecHdr)) { + boot->last_error = -EPOF_INTERNAL; + break; + } + boot->pof_recid = boot->buf.PofRecHdr.PofRecId; /* actual pof recid */ + boot->pof_reclen = boot->buf.PofRecHdr.PofRecDataLen; /* total length */ + boot->pof_recoffset = 0; /* no starting offset */ + + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "POF: got record id=0x%lx length=%ld ", + boot->pof_recid, boot->pof_reclen); + + boot->pof_state = POF_READ_TAG_DATA; /* now start with tag data */ + if (boot->pof_reclen < BOOT_BUF_SIZE) + boot->last_error = boot->pof_reclen; /* limit size */ + else + boot->last_error = BOOT_BUF_SIZE; /* maximum */ + + if (!boot->last_error) { /* no data inside record */ + boot->pof_state = POF_READ_TAG_HEAD; /* now start with single tags */ + boot->last_error = sizeof(tPofRecHdr); /* new length */ + } + break; + + case POF_READ_TAG_DATA: + if (card->debug_flags & LOG_POF_WRITE) + hysdn_addlog(card, "POF write: getting tag data"); + + if (datlen != boot->last_error) { + boot->last_error = -EPOF_INTERNAL; + break; + } + if ((boot->last_error = pof_handle_data(card, datlen)) < 0) + return (boot->last_error); /* an error occurred */ + boot->pof_recoffset += datlen; + if (boot->pof_recoffset >= boot->pof_reclen) { + boot->pof_state = POF_READ_TAG_HEAD; /* now start with single tags */ + boot->last_error = sizeof(tPofRecHdr); /* new length */ + } else { + if (boot->pof_reclen - boot->pof_recoffset < BOOT_BUF_SIZE) + boot->last_error = boot->pof_reclen - boot->pof_recoffset; /* limit size */ + else + boot->last_error = BOOT_BUF_SIZE; /* maximum */ + } + break; + + default: + boot->last_error = -EPOF_INTERNAL; /* unknown state */ + break; + } /* switch (boot->pof_state) */ + + return (boot->last_error); +} /* pof_write_buffer */ + + +/*******************************************************************************/ +/* pof_write_open is called when an open for boot on the cardlog device occurs. */ +/* The function returns the needed number of bytes for the next operation. If */ +/* the returned number is less or equal 0 an error specified by this code */ +/* occurred. Additionally the pointer to the buffer data area is set on success */ +/*******************************************************************************/ +int +pof_write_open(hysdn_card *card, unsigned char **bufp) +{ + struct boot_data *boot; /* pointer to boot specific data */ + + if (card->boot) { + if (card->debug_flags & LOG_POF_OPEN) + hysdn_addlog(card, "POF open: already opened for boot"); + return (-ERR_ALREADY_BOOT); /* boot already active */ + } + /* error no mem available */ + if (!(boot = kzalloc(sizeof(struct boot_data), GFP_KERNEL))) { + if (card->debug_flags & LOG_MEM_ERR) + hysdn_addlog(card, "POF open: unable to allocate mem"); + return (-EFAULT); + } + card->boot = boot; + card->state = CARD_STATE_BOOTING; + + card->stopcard(card); /* first stop the card */ + if (card->testram(card)) { + if (card->debug_flags & LOG_POF_OPEN) + hysdn_addlog(card, "POF open: DPRAM test failure"); + boot->last_error = -ERR_BOARD_DPRAM; + card->state = CARD_STATE_BOOTERR; /* show boot error */ + return (boot->last_error); + } + boot->BufSize = 0; /* Buffer is empty */ + boot->pof_state = POF_READ_FILE_HEAD; /* read file header */ + StartDecryption(boot); /* if POF File should be encrypted */ + + if (card->debug_flags & LOG_POF_OPEN) + hysdn_addlog(card, "POF open: success"); + + *bufp = boot->buf.BootBuf; /* point to buffer */ + return (sizeof(tPofFileHdr)); +} /* pof_write_open */ + +/********************************************************************************/ +/* pof_write_close is called when an close of boot on the cardlog device occurs. */ +/* The return value must be 0 if everything has happened as desired. */ +/********************************************************************************/ +int +pof_write_close(hysdn_card *card) +{ + struct boot_data *boot = card->boot; /* pointer to boot specific data */ + + if (!boot) + return (-EFAULT); /* invalid call */ + + card->boot = NULL; /* no boot active */ + kfree(boot); + + if (card->state == CARD_STATE_RUN) + card->set_errlog_state(card, 1); /* activate error log */ + + if (card->debug_flags & LOG_POF_OPEN) + hysdn_addlog(card, "POF close: success"); + + return (0); +} /* pof_write_close */ + +/*********************************************************************************/ +/* EvalSysrTokData checks additional records delivered with the Sysready Message */ +/* when POF has been booted. A return value of 0 is used if no error occurred. */ +/*********************************************************************************/ +int +EvalSysrTokData(hysdn_card *card, unsigned char *cp, int len) +{ + u_char *p; + u_char crc; + + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "SysReady Token data length %d", len); + + if (len < 2) { + hysdn_addlog(card, "SysReady Token Data to short"); + return (1); + } + for (p = cp, crc = 0; p < (cp + len - 2); p++) + if ((crc & 0x80)) + crc = (((u_char) (crc << 1)) + 1) + *p; + else + crc = ((u_char) (crc << 1)) + *p; + crc = ~crc; + if (crc != *(cp + len - 1)) { + hysdn_addlog(card, "SysReady Token Data invalid CRC"); + return (1); + } + len--; /* don't check CRC byte */ + while (len > 0) { + + if (*cp == SYSR_TOK_END) + return (0); /* End of Token stream */ + + if (len < (*(cp + 1) + 2)) { + hysdn_addlog(card, "token 0x%x invalid length %d", *cp, *(cp + 1)); + return (1); + } + switch (*cp) { + case SYSR_TOK_B_CHAN: /* 1 */ + if (*(cp + 1) != 1) + return (1); /* length invalid */ + card->bchans = *(cp + 2); + break; + + case SYSR_TOK_FAX_CHAN: /* 2 */ + if (*(cp + 1) != 1) + return (1); /* length invalid */ + card->faxchans = *(cp + 2); + break; + + case SYSR_TOK_MAC_ADDR: /* 3 */ + if (*(cp + 1) != 6) + return (1); /* length invalid */ + memcpy(card->mac_addr, cp + 2, 6); + break; + + default: + hysdn_addlog(card, "unknown token 0x%02x length %d", *cp, *(cp + 1)); + break; + } + len -= (*(cp + 1) + 2); /* adjust len */ + cp += (*(cp + 1) + 2); /* and pointer */ + } + + hysdn_addlog(card, "no end token found"); + return (1); +} /* EvalSysrTokData */ |