static int ipath_resync_ibepb(struct ipath_devdata *dd)
{
int ret, pat, tries, chn;
u32 loc;
ret = -1;
chn = 0;
for (tries = 0; tries < (4 * IBSD_RESYNC_TRIES); ++tries) {
loc = IB_PGUDP(chn);
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0);
if (ret < 0) {
ipath_dev_err(dd, "Failed read in resync\n");
continue;
}
if (ret != 0xF0 && ret != 0x55 && tries == 0)
ipath_dev_err(dd, "unexpected pattern in resync\n");
pat = ret ^ 0xA5; /* alternate F0 and 55 */
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, pat, 0xFF);
if (ret < 0) {
ipath_dev_err(dd, "Failed write in resync\n");
continue;
}
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0);
if (ret < 0) {
ipath_dev_err(dd, "Failed re-read in resync\n");
continue;
}
if (ret != pat) {
ipath_dev_err(dd, "Failed compare1 in resync\n");
continue;
}
loc = IB_CMUDONE(chn);
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0);
if (ret < 0) {
ipath_dev_err(dd, "Failed CMUDONE rd in resync\n");
continue;
}
if ((ret & 0x70) != ((chn << 4) | 0x40)) {
ipath_dev_err(dd, "Bad CMUDONE value %02X, chn %d\n",
ret, chn);
continue;
}
if (++chn == 4)
break; /* Success */
}
ipath_cdbg(VERBOSE, "Resync in %d tries\n", tries);
return (ret > 0) ? 0 : ret;
}
static void ipath_sd_trimdone_monitor(struct ipath_devdata *dd,
const char *where)
{
int ret, chn, baduns;
u64 val;
if (!where)
where = "?";
/* give time for reset to settle out in EPB */
udelay(2);
ret = ipath_resync_ibepb(dd);
if (ret < 0)
ipath_dev_err(dd, "not able to re-sync IB EPB (%s)\n", where);
/* Do "sacrificial read" to get EPB in sane state after reset */
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_CTRL2(0), 0, 0);
if (ret < 0)
ipath_dev_err(dd, "Failed TRIMDONE 1st read, (%s)\n", where);
/* Check/show "summary" Trim-done bit in IBCStatus */
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus);
if (val & (1ULL << 11))
ipath_cdbg(VERBOSE, "IBCS TRIMDONE set (%s)\n", where);
else
ipath_dev_err(dd, "IBCS TRIMDONE clear (%s)\n", where);
udelay(2);
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0x80, 0x80);
if (ret < 0)
ipath_dev_err(dd, "Failed Dummy RMW, (%s)\n", where);
udelay(10);
baduns = 0;
for (chn = 3; chn >= 0; --chn) {
/* Read CTRL reg for each channel to check TRIMDONE */
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0, 0);
if (ret < 0)
ipath_dev_err(dd, "Failed checking TRIMDONE, chn %d"
" (%s)\n", chn, where);
if (!(ret & 0x10)) {
int probe;
baduns |= (1 << chn);
ipath_dev_err(dd, "TRIMDONE cleared on chn %d (%02X)."
" (%s)\n", chn, ret, where);
probe = ipath_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_PGUDP(0), 0, 0);
ipath_dev_err(dd, "probe is %d (%02X)\n",
probe, probe);
probe = ipath_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0, 0);
ipath_dev_err(dd, "re-read: %d (%02X)\n",
probe, probe);
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0x10, 0x10);
if (ret < 0)
ipath_dev_err(dd,
"Err on TRIMDONE rewrite1\n");
}
}
for (chn = 3; chn >= 0; --chn) {
/* Read CTRL reg for each channel to check TRIMDONE */
if (baduns & (1 << chn)) {
ipath_dev_err(dd,
"Reseting TRIMDONE on chn %d (%s)\n",
chn, where);
ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0x10, 0x10);
if (ret < 0)
ipath_dev_err(dd, "Failed re-setting "
"TRIMDONE, chn %d (%s)\n",
chn, where);
}
}
}
static void qib_sd_trimdone_monitor(struct qib_devdata *dd,
const char *where)
{
int ret, chn, baduns;
u64 val;
if (!where)
where = "?";
udelay(2);
ret = qib_resync_ibepb(dd);
if (ret < 0)
qib_dev_err(dd, "not able to re-sync IB EPB (%s)\n", where);
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_CTRL2(0), 0, 0);
if (ret < 0)
qib_dev_err(dd, "Failed TRIMDONE 1st read, (%s)\n", where);
val = qib_read_kreg64(dd, kr_ibcstatus);
if (!(val & (1ULL << 11)))
qib_dev_err(dd, "IBCS TRIMDONE clear (%s)\n", where);
udelay(2);
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0x80, 0x80);
if (ret < 0)
qib_dev_err(dd, "Failed Dummy RMW, (%s)\n", where);
udelay(10);
baduns = 0;
for (chn = 3; chn >= 0; --chn) {
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0, 0);
if (ret < 0)
qib_dev_err(dd, "Failed checking TRIMDONE, chn %d"
" (%s)\n", chn, where);
if (!(ret & 0x10)) {
int probe;
baduns |= (1 << chn);
qib_dev_err(dd, "TRIMDONE cleared on chn %d (%02X)."
" (%s)\n", chn, ret, where);
probe = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_PGUDP(0), 0, 0);
qib_dev_err(dd, "probe is %d (%02X)\n",
probe, probe);
probe = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0, 0);
qib_dev_err(dd, "re-read: %d (%02X)\n",
probe, probe);
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0x10, 0x10);
if (ret < 0)
qib_dev_err(dd,
"Err on TRIMDONE rewrite1\n");
}
}
for (chn = 3; chn >= 0; --chn) {
if (baduns & (1 << chn)) {
qib_dev_err(dd,
"Reseting TRIMDONE on chn %d (%s)\n",
chn, where);
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
IB_CTRL2(chn), 0x10, 0x10);
if (ret < 0)
qib_dev_err(dd, "Failed re-setting "
"TRIMDONE, chn %d (%s)\n",
chn, where);
}
}
}
