skvpd.c

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int		Len)	/* number of bytes to read / to write */
{
	int		i;
	SK_U16	AdrReg;
	int		Rtv;

	for (i = 0; i < Len; i++, buf++) {
		if ((i%sizeof(SK_U32)) == 0) {
			/* New Address needs to be written to VPD_ADDR reg */
			AdrReg = (SK_U16) Addr;
			Addr += sizeof(SK_U32);
			AdrReg &= ~VPD_WRITE;	/* READ operation */

			VPD_OUT16(pAC, IoC, PCI_VPD_ADR_REG, AdrReg);

			/* Wait for termination */
			Rtv = VpdWait(pAC, IoC, VPD_READ);
			if (Rtv != 0) {
				return(i);
			}
		}
		VPD_IN8(pAC, IoC, PCI_VPD_DAT_REG + (i%sizeof(SK_U32)),
			(SK_U8 *)buf);
	}

	return(Len);
}

/*
 *	Read ore writes 'len' bytes of VPD data, starting at 'addr' from
 *	or to the I2C EEPROM.
 *
 * Returns number of bytes read / written.
 */
static int VpdTransferBlock(
SK_AC	*pAC,	/* Adapters context */
SK_IOC	IoC,	/* IO Context */
char	*buf,	/* data buffer */
int		addr,	/* VPD start address */
int		len,	/* number of bytes to read / to write */
int		dir)	/* transfer direction may be VPD_READ or VPD_WRITE */
{
	int		Rtv;	/* Return value */
	int		vpd_rom_size;

	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
		("VPD %s block, addr = 0x%x, len = %d\n",
		dir ? "write" : "read", addr, len));

	if (len == 0)
		return(0);

	vpd_rom_size = pAC->vpd.rom_size;

	if (addr > vpd_rom_size - 4) {
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Address error: 0x%x, exp. < 0x%x\n",
			addr, vpd_rom_size - 4));
		return(0);
	}

	if (addr + len > vpd_rom_size) {
		len = vpd_rom_size - addr;
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR,
			("Warning: len was cut to %d\n", len));
	}

	if (dir == VPD_READ) {
		Rtv = VpdReadStream(pAC, IoC, buf, addr, len);
	}
	else {
		Rtv = VpdWriteStream(pAC, IoC, buf, addr, len);
	}

	return(Rtv);
}

#ifdef SKDIAG

/*
 *	Read 'len' bytes of VPD data, starting at 'addr'.
 *
 * Returns number of bytes read.
 */
int VpdReadBlock(
SK_AC	*pAC,	/* pAC pointer */
SK_IOC	IoC,	/* IO Context */
char	*buf,	/* buffer were the data should be stored */
int		addr,	/* start reading at the VPD address */
int		len)	/* number of bytes to read */
{
	return(VpdTransferBlock(pAC, IoC, buf, addr, len, VPD_READ));
}

/*
 *	Write 'len' bytes of *but to the VPD EEPROM, starting at 'addr'.
 *
 * Returns number of bytes writes.
 */
int VpdWriteBlock(
SK_AC	*pAC,	/* pAC pointer */
SK_IOC	IoC,	/* IO Context */
char	*buf,	/* buffer, holds the data to write */
int		addr,	/* start writing at the VPD address */
int		len)	/* number of bytes to write */
{
	return(VpdTransferBlock(pAC, IoC, buf, addr, len, VPD_WRITE));
}
#endif	/* SKDIAG */

/*
 * (re)initialize the VPD buffer
 *
 * Reads the VPD data from the EEPROM into the VPD buffer.
 * Get the remaining read only and read / write space.
 *
 * return	0:	success
 *		1:	fatal VPD error
 */
static int VpdInit(
SK_AC	*pAC,	/* Adapters context */
SK_IOC	IoC)	/* IO Context */
{
	SK_VPD_PARA *r, rp;	/* RW or RV */
	int		i;
	unsigned char	x;
	int		vpd_size;
	SK_U16	dev_id;
	SK_U32	our_reg2;

	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_INIT, ("VpdInit .. "));

	VPD_IN16(pAC, IoC, PCI_DEVICE_ID, &dev_id);

	VPD_IN32(pAC, IoC, PCI_OUR_REG_2, &our_reg2);

	pAC->vpd.rom_size = 256 << ((our_reg2 & PCI_VPD_ROM_SZ) >> 14);

	/*
	 * this function might get used before the hardware is initialized
	 * therefore we cannot always trust in GIChipId
	 */
	if (((pAC->vpd.v.vpd_status & VPD_VALID) == 0 &&
		dev_id != VPD_DEV_ID_GENESIS) ||
		((pAC->vpd.v.vpd_status & VPD_VALID) != 0 &&
		!pAC->GIni.GIGenesis)) {

		/* for Yukon the VPD size is always 256 */
		vpd_size = VPD_SIZE_YUKON;
	}
	else {
		/* Genesis uses the maximum ROM size up to 512 for VPD */
		if (pAC->vpd.rom_size > VPD_SIZE_GENESIS) {
			vpd_size = VPD_SIZE_GENESIS;
		}
		else {
			vpd_size = pAC->vpd.rom_size;
		}
	}

	/* read the VPD data into the VPD buffer */
	if (VpdTransferBlock(pAC, IoC, pAC->vpd.vpd_buf, 0, vpd_size, VPD_READ)
		!= vpd_size) {

		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR,
			("Block Read Error\n"));
		return(1);
	}

	pAC->vpd.vpd_size = vpd_size;

	/* find the end tag of the RO area */
	if (!(r = vpd_find_para(pAC, VPD_RV, &rp))) {
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Encoding Error: RV Tag not found\n"));
		return(1);
	}

	if (r->p_val + r->p_len > pAC->vpd.vpd_buf + vpd_size/2) {
		SK_DBG_MSG(pAC,SK_DBGMOD_VPD,SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Encoding Error: Invalid VPD struct size\n"));
		return(1);
	}
	pAC->vpd.v.vpd_free_ro = r->p_len - 1;

	/* test the checksum */
	for (i = 0, x = 0; (unsigned)i <= (unsigned)vpd_size/2 - r->p_len; i++) {
		x += pAC->vpd.vpd_buf[i];
	}

	if (x != 0) {
		/* checksum error */
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("VPD Checksum Error\n"));
		return(1);
	}

	/* find and check the end tag of the RW area */
	if (!(r = vpd_find_para(pAC, VPD_RW, &rp))) {
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Encoding Error: RV Tag not found\n"));
		return(1);
	}

	if (r->p_val < pAC->vpd.vpd_buf + vpd_size/2) {
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Encoding Error: Invalid VPD struct size\n"));
		return(1);
	}
	pAC->vpd.v.vpd_free_rw = r->p_len;

	/* everything seems to be ok */
	if (pAC->GIni.GIChipId != 0) {
		pAC->vpd.v.vpd_status |= VPD_VALID;
	}

	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_INIT,
		("done. Free RO = %d, Free RW = %d\n",
		pAC->vpd.v.vpd_free_ro, pAC->vpd.v.vpd_free_rw));

	return(0);
}

/*
 *	find the Keyword 'key' in the VPD buffer and fills the
 *	parameter struct 'p' with it's values
 *
 * returns	*p	success
 *		0:	parameter was not found or VPD encoding error
 */
static SK_VPD_PARA *vpd_find_para(
SK_AC		*pAC,	/* common data base */
const char	*key,	/* keyword to find (e.g. "MN") */
SK_VPD_PARA *p)		/* parameter description struct */
{
	char *v	;	/* points to VPD buffer */
	int max;	/* Maximum Number of Iterations */

	v = pAC->vpd.vpd_buf;
	max = 128;

	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
		("VPD find para %s .. ",key));

	/* check mandatory resource type ID string (Product Name) */
	if (*v != (char)RES_ID) {
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Error: 0x%x missing\n", RES_ID));
		return(0);
	}

	if (strcmp(key, VPD_NAME) == 0) {
		p->p_len = VPD_GET_RES_LEN(v);
		p->p_val = VPD_GET_VAL(v);
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
			("found, len = %d\n", p->p_len));
		return(p);
	}

	v += 3 + VPD_GET_RES_LEN(v) + 3;
	for (;; ) {
		if (SK_MEMCMP(key,v,2) == 0) {
			p->p_len = VPD_GET_VPD_LEN(v);
			p->p_val = VPD_GET_VAL(v);
			SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
				("found, len = %d\n",p->p_len));
			return(p);
		}

		/* exit when reaching the "RW" Tag or the maximum of itera. */
		max--;
		if (SK_MEMCMP(VPD_RW,v,2) == 0 || max == 0) {
			break;
		}

		if (SK_MEMCMP(VPD_RV,v,2) == 0) {
			v += 3 + VPD_GET_VPD_LEN(v) + 3;	/* skip VPD-W */
		}
		else {
			v += 3 + VPD_GET_VPD_LEN(v);
		}
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
			("scanning '%c%c' len = %d\n",v[0],v[1],v[2]));
	}

#ifdef DEBUG
	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL, ("not found\n"));
	if (max == 0) {
		SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Key/Len Encoding error\n"));
	}
#endif /* DEBUG */
	return(0);
}

/*
 *	Move 'n' bytes. Begin with the last byte if 'n' is > 0,
 *	Start with the last byte if n is < 0.
 *
 * returns nothing
 */
static void vpd_move_para(
char	*start,		/* start of memory block */
char	*end,		/* end of memory block to move */
int		n)			/* number of bytes the memory block has to be moved */
{
	char *p;
	int i;		/* number of byte copied */

	if (n == 0)
		return;

	i = (int) (end - start + 1);
	if (n < 0) {
		p = start + n;
		while (i != 0) {
			*p++ = *start++;
			i--;
		}
	}
	else {
		p = end + n;
		while (i != 0) {
			*p-- = *end--;
			i--;
		}
	}
}

/*
 *	setup the VPD keyword 'key' at 'ip'.
 *
 * returns nothing
 */
static void vpd_insert_key(
const char	*key,	/* keyword to insert */
const char	*buf,	/* buffer with the keyword value */
int		len,		/* length of the value string */
char	*ip)		/* inseration point */
{
	SK_VPD_KEY *p;

	p = (SK_VPD_KEY *) ip;
	p->p_key[0] = key[0];
	p->p_key[1] = key[1];
	p->p_len = (unsigned char) len;
	SK_MEMCPY(&p->p_val,buf,len);
}

/*
 *	Setup the VPD end tag "RV" / "RW".
 *	Also correct the remaining space variables vpd_free_ro / vpd_free_rw.
 *
 * returns	0:	success
 *		1:	encoding error
 */
static int vpd_mod_endtag(
SK_AC	*pAC,		/* common data base */
char	*etp)		/* end pointer input position */
{
	SK_VPD_KEY *p;
	unsigned char	x;
	int	i;
	int	vpd_size;

	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
		("VPD modify endtag at 0x%x = '%c%c'\n",etp,etp[0],etp[1]));

	vpd_size = pAC->vpd.vpd_size;

	p = (SK_VPD_KEY *) etp;

	if (p->p_key[0] != 'R' || (p->p_key[1] != 'V' && p->p_key[1] != 'W')) {
		/* something wrong here, encoding error */
		SK_DBG_MSG(pAC,SK_DBGMOD_VPD,SK_DBGCAT_ERR | SK_DBGCAT_FATAL,
			("Encoding Error: invalid end tag\n"));
		return(1);
	}
	if (etp > pAC->vpd.vpd_buf + vpd_size/2) {
		/* create "RW" tag */
		p->p_len = (unsigned char)(pAC->vpd.vpd_buf+vpd_size-etp-3-1);
		pAC->vpd.v.vpd_free_rw = (int) p->p_len;
		i = pAC->vpd.v.vpd_free_rw;
		etp += 3;
	}
	else {
		/* create "RV" tag */
		p->p_len = (unsigned char)(pAC->vpd.vpd_buf+vpd_size/2-etp-3);
		pAC->vpd.v.vpd_free_ro = (int) p->p_len - 1;

		/* setup checksum */
		for (i = 0, x = 0; i < vpd_size/2 - p->p_len; i++) {
			x += pAC->vpd.vpd_buf[i];
		}
		p->p_val = (char) 0 - x;
		i = pAC->vpd.v.vpd_free_ro;
		etp += 4;
	}
	while (i) {
		*etp++ = 0x00;
		i--;
	}

	return(0);
}

/*
 *	Insert a VPD keyword into the VPD buffer.
 *
 *	The keyword 'key' is inserted at the position 'ip' in the
 *	VPD buffer.
 *	The keywords behind the input position will
 *	be moved. The VPD end tag "RV" or "RW" is generated again.
 *
 * returns	0:	success
 *		2:	value string was cut
 *		4:	VPD full, keyword was not written
 *		6:	fatal VPD error
 *
 */
int	VpdSetupPara(
SK_AC	*pAC,		/* common data base */
const char	*key,	/* keyword to insert */
const char	*buf,	/* buffer with the keyword value */
int		len,		/* length of the keyword value */
int		type,		/* VPD_RO_KEY or VPD_RW_KEY */
int		op)			/* operation to do: ADD_KEY or OWR_KEY */
{
	SK_VPD_PARA vp;
	char	*etp;		/* end tag position */
	int	free;		/* remaining space in selected area */
	char	*ip;		/* input position inside the VPD buffer */
	int	rtv;		/* return code */
	int	head;		/* additional haeder bytes to move */
	int	found;		/* additinoal bytes if the keyword was found */
	int vpd_size;

	SK_DBG_MSG(pAC, SK_DBGMOD_VPD, SK_DBGCAT_CTRL,
		("VPD setup para key = %s, val = %s\n",key,buf));

	vpd_size = pAC->vpd.vpd_size;

	rtv = 0;
	ip = 0;
	if (type == VPD_RW_KEY) {