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xpp: pri: fix RS1 init in E1 CAS mode

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Force some reserved bits to really be 1 in E1 mode (otherwise
terrorists will win).

(Closes issue DAHLIN-264)

Signed-off-by: Oron Peled <oron.peled@xorcom.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10346 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Oron Peled 2011-11-29 23:37:33 +00:00 committed by Tzafrir Cohen
parent cc7c73c4d8
commit 244c9bd254
1 changed files with 11 additions and 0 deletions
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11
drivers/dahdi/xpp/card_pri.c
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@ -1034,6 +1034,17 @@ static int pri_lineconfig(xpd_t *xpd, int lineconfig)
}
#endif
if(force_cas) {
if(priv->pri_protocol == PRI_PROTO_E1) {
int rs1 = 0x0B;
/*
* Set correct X1-X3 bits in the E1 CAS MFAS
* They are unused in E1 and should be 1
*/
XPD_DBG(GENERAL, xpd, "%s: rs1(0x%02X) = 0x%02X\n",
__FUNCTION__, REG_RS1_E, rs1);
write_subunit(xpd, REG_RS1_E, rs1);
}
xsp |= REG_XSP_E_CASEN; /* Same as REG_FMR5_T_EIBR for T1 */
}
XPD_DBG(GENERAL, xpd, "%s: xsp(0x%02X) = 0x%02X\n", __FUNCTION__, REG_XSP_E, xsp);