Pluck out all this VFIFO value counting, which turns out to be completely unused. Thus, remove it to simplify the code.
Signed-off-by: Marek Vasut marex@denx.de --- drivers/ddr/altera/sequencer.c | 92 +++++++++++++++++++----------------------- 1 file changed, 41 insertions(+), 51 deletions(-)
diff --git a/drivers/ddr/altera/sequencer.c b/drivers/ddr/altera/sequencer.c index 3d0dc59..50a5b8e 100644 --- a/drivers/ddr/altera/sequencer.c +++ b/drivers/ddr/altera/sequencer.c @@ -1289,38 +1289,35 @@ static uint32_t rw_mgr_mem_calibrate_read_test_all_ranks(uint32_t group, /** * rw_mgr_incr_vfifo() - Increase VFIFO value * @grp: Read/Write group - * @v: VFIFO value * * Increase VFIFO value. */ -static void rw_mgr_incr_vfifo(const u32 grp, u32 *v) +static void rw_mgr_incr_vfifo(const u32 grp) { writel(grp, &phy_mgr_cmd->inc_vfifo_hard_phy); - (*v)++; }
/** * rw_mgr_decr_vfifo() - Decrease VFIFO value * @grp: Read/Write group - * @v: VFIFO value * * Decrease VFIFO value. */ -static void rw_mgr_decr_vfifo(const u32 grp, u32 *v) +static void rw_mgr_decr_vfifo(const u32 grp) { u32 i;
for (i = 0; i < VFIFO_SIZE - 1; i++) - rw_mgr_incr_vfifo(grp, v); + rw_mgr_incr_vfifo(grp); }
static int find_vfifo_read(uint32_t grp, uint32_t *bit_chk) { - uint32_t v; + uint32_t v; uint32_t fail_cnt = 0; uint32_t test_status;
- for (v = 0; v < VFIFO_SIZE; ) { + for (v = 0; v < VFIFO_SIZE; v++) { debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: vfifo %u\n", __func__, __LINE__, v); test_status = rw_mgr_mem_calibrate_read_test_all_ranks @@ -1333,7 +1330,7 @@ static int find_vfifo_read(uint32_t grp, uint32_t *bit_chk) }
/* fiddle with FIFO */ - rw_mgr_incr_vfifo(grp, &v); + rw_mgr_incr_vfifo(grp); }
if (v >= VFIFO_SIZE) { @@ -1350,14 +1347,13 @@ static int find_vfifo_read(uint32_t grp, uint32_t *bit_chk) * sdr_find_phase() - Find DQS enable phase * @working: If 1, look for working phase, if 0, look for non-working phase * @grp: Read/Write group - * @v: VFIFO value * @work: Working window position * @i: Iterator * @p: DQS Phase Iterator * * Find working or non-working DQS enable phase setting. */ -static int sdr_find_phase(int working, const u32 grp, u32 *v, u32 *work, +static int sdr_find_phase(int working, const u32 grp, u32 *work, u32 *i, u32 *p) { u32 ret, bit_chk; @@ -1383,7 +1379,7 @@ static int sdr_find_phase(int working, const u32 grp, u32 *v, u32 *work,
if (*p > IO_DQS_EN_PHASE_MAX) { /* Fiddle with FIFO. */ - rw_mgr_incr_vfifo(grp, v); + rw_mgr_incr_vfifo(grp); if (!working) *p = 0; } @@ -1396,14 +1392,13 @@ static int sdr_find_phase(int working, const u32 grp, u32 *v, u32 *work, * sdr_working_phase() - Find working DQS enable phase * @grp: Read/Write group * @work_bgn: Working window start position - * @v: VFIFO value * @d: dtaps output value * @p: DQS Phase Iterator * @i: Iterator * * Find working DQS enable phase setting. */ -static int sdr_working_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *d, +static int sdr_working_phase(const u32 grp, u32 *work_bgn, u32 *d, u32 *p, u32 *i) { const u32 dtaps_per_ptap = IO_DELAY_PER_OPA_TAP / @@ -1415,7 +1410,7 @@ static int sdr_working_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *d, for (*d = 0; *d <= dtaps_per_ptap; (*d)++) { *i = 0; scc_mgr_set_dqs_en_delay_all_ranks(grp, *d); - ret = sdr_find_phase(1, grp, v, work_bgn, i, p); + ret = sdr_find_phase(1, grp, work_bgn, i, p); if (!ret) return 0; *work_bgn += IO_DELAY_PER_DQS_EN_DCHAIN_TAP; @@ -1431,12 +1426,11 @@ static int sdr_working_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *d, * sdr_backup_phase() - Find DQS enable backup phase * @grp: Read/Write group * @work_bgn: Working window start position - * @v: VFIFO value * @p: DQS Phase Iterator * * Find DQS enable backup phase setting. */ -static void sdr_backup_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *p) +static void sdr_backup_phase(const u32 grp, u32 *work_bgn, u32 *p) { u32 tmp_delay, bit_chk, d; int ret; @@ -1444,7 +1438,7 @@ static void sdr_backup_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *p) /* Special case code for backing up a phase */ if (*p == 0) { *p = IO_DQS_EN_PHASE_MAX; - rw_mgr_decr_vfifo(grp, v); + rw_mgr_decr_vfifo(grp); } else { (*p)--; } @@ -1468,7 +1462,7 @@ static void sdr_backup_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *p) (*p)++; if (*p > IO_DQS_EN_PHASE_MAX) { *p = 0; - rw_mgr_incr_vfifo(grp, v); + rw_mgr_incr_vfifo(grp); }
scc_mgr_set_dqs_en_delay_all_ranks(grp, 0); @@ -1478,14 +1472,12 @@ static void sdr_backup_phase(const u32 grp, u32 *work_bgn, u32 *v, u32 *p) * sdr_nonworking_phase() - Find non-working DQS enable phase * @grp: Read/Write group * @work_end: Working window end position - * @v: VFIFO value * @p: DQS Phase Iterator * @i: Iterator * * Find non-working DQS enable phase setting. */ -static int sdr_nonworking_phase(const u32 grp, u32 *work_end, u32 *v, - u32 *p, u32 *i) +static int sdr_nonworking_phase(const u32 grp, u32 *work_end, u32 *p, u32 *i) { int ret;
@@ -1494,10 +1486,10 @@ static int sdr_nonworking_phase(const u32 grp, u32 *work_end, u32 *v, if (*p > IO_DQS_EN_PHASE_MAX) { /* Fiddle with FIFO. */ *p = 0; - rw_mgr_incr_vfifo(grp, v); + rw_mgr_incr_vfifo(grp); }
- ret = sdr_find_phase(0, grp, v, work_end, i, p); + ret = sdr_find_phase(0, grp, work_end, i, p); if (ret) { /* Cannot see edge of failing read. */ debug_cond(DLEVEL == 2, "%s:%d: end: failed\n", @@ -1512,14 +1504,13 @@ static int sdr_nonworking_phase(const u32 grp, u32 *work_end, u32 *v, * @grp: Read/Write group * @work_bgn: First working settings * @work_end: Last working settings - * @val: VFIFO value * * Find center of the working DQS enable window. */ static int sdr_find_window_center(const u32 grp, const u32 work_bgn, - const u32 work_end, const u32 val) + const u32 work_end) { - u32 bit_chk, work_mid, v = val; + u32 bit_chk, work_mid; int tmp_delay = 0; int i, p, d;
@@ -1556,19 +1547,18 @@ static int sdr_find_window_center(const u32 grp, const u32 work_bgn, * because the largest possible margin in 1 VFIFO cycle. */ for (i = 0; i < VFIFO_SIZE; i++) { - debug_cond(DLEVEL == 2, "find_dqs_en_phase: center: vfifo=%u\n", - v); + debug_cond(DLEVEL == 2, "find_dqs_en_phase: center\n"); if (rw_mgr_mem_calibrate_read_test_all_ranks(grp, 1, PASS_ONE_BIT, &bit_chk, 0)) { debug_cond(DLEVEL == 2, - "%s:%d center: found: vfifo=%u ptap=%u dtap=%u\n", - __func__, __LINE__, v, p, d); + "%s:%d center: found: ptap=%u dtap=%u\n", + __func__, __LINE__, p, d); return 0; }
/* Fiddle with FIFO. */ - rw_mgr_incr_vfifo(grp, &v); + rw_mgr_incr_vfifo(grp); }
debug_cond(DLEVEL == 2, "%s:%d center: failed.\n", @@ -1579,7 +1569,7 @@ static int sdr_find_window_center(const u32 grp, const u32 work_bgn, /* find a good dqs enable to use */ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp) { - uint32_t v, d, p, i; + uint32_t d, p, i; uint32_t bit_chk; uint32_t dtaps_per_ptap; uint32_t work_bgn, work_end; @@ -1598,12 +1588,12 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
/* ********************************************************* */ /* * Step 1 : First push vfifo until we get a failing read * */ - v = find_vfifo_read(grp, &bit_chk); + find_vfifo_read(grp, &bit_chk);
/* ******************************************************** */ /* * step 2: find first working phase, increment in ptaps * */ work_bgn = 0; - if (sdr_working_phase(grp, &work_bgn, &v, &d, &p, &i)) + if (sdr_working_phase(grp, &work_bgn, &d, &p, &i)) return 0;
work_end = work_bgn; @@ -1618,12 +1608,12 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp) /* * step 3a: if we have room, back off by one and increment in dtaps * */
- sdr_backup_phase(grp, &work_bgn, &v, &p); + sdr_backup_phase(grp, &work_bgn, &p);
/* ********************************************************* */ /* * step 4a: go forward from working phase to non working phase, increment in ptaps * */ - if (sdr_nonworking_phase(grp, &work_end, &v, &p, &i)) + if (sdr_nonworking_phase(grp, &work_end, &p, &i)) return 0;
/* ********************************************************* */ @@ -1632,7 +1622,7 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp) /* Special case code for backing up a phase */ if (p == 0) { p = IO_DQS_EN_PHASE_MAX; - rw_mgr_decr_vfifo(grp, &v); + rw_mgr_decr_vfifo(grp); } else { p = p - 1; } @@ -1644,16 +1634,16 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp) the if/else loop to share code */ d = 0;
- debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: v/p: \ - vfifo=%u ptap=%u\n", __func__, __LINE__, - v, p); + debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: p: \ + ptap=%u\n", __func__, __LINE__, + p); } else { /* ******************************************************* */ /* * step 3-5b: Find the right edge of the window using delay taps * */ - debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase:vfifo=%u \ + debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: \ ptap=%u dtap=%u bgn=%u\n", __func__, __LINE__, - v, p, d, work_bgn); + p, d, work_bgn);
work_end = work_bgn; } @@ -1676,9 +1666,9 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp) if (d != 0) work_end -= IO_DELAY_PER_DQS_EN_DCHAIN_TAP;
- debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: v/p/d: vfifo=%u \ + debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: p/d: \ ptap=%u dtap=%u end=%u\n", __func__, __LINE__, - v, p, d-1, work_end); + p, d-1, work_end);
if (work_end < work_bgn) { /* nil range */ @@ -1703,15 +1693,15 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp) /* Special case code for backing up a phase */ if (p == 0) { p = IO_DQS_EN_PHASE_MAX; - rw_mgr_decr_vfifo(grp, &v); + rw_mgr_decr_vfifo(grp); debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: backedup \ - cycle/phase: v=%u p=%u\n", __func__, __LINE__, - v, p); + cycle/phase: p=%u\n", __func__, __LINE__, + p); } else { p = p - 1; debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: backedup \ - phase only: v=%u p=%u", __func__, __LINE__, - v, p); + phase only: p=%u", __func__, __LINE__, + p); }
scc_mgr_set_dqs_en_phase_all_ranks(grp, p); @@ -1778,7 +1768,7 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
/* ******************************************** */ /* * step 6: Find the centre of the window * */ - if (sdr_find_window_centre(grp, work_bgn, work_end, v)) + if (sdr_find_window_centre(grp, work_bgn, work_end)) return 0; /* FIXME: Old code, return 0 means failure :-( */
return 1;