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ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase() part 1
Fix broken multiline debug strings, fix comments. No functional change. Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut
parent
d145ca9fc3
commit
2f3589ca54
@ -1566,7 +1566,7 @@ static int sdr_find_window_center(const u32 grp, const u32 work_bgn,
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}
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/* find a good dqs enable to use */
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static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(u32 grp)
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{
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uint32_t d, p, i;
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uint32_t bit_chk;
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@ -1581,16 +1581,13 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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scc_mgr_set_dqs_en_delay_all_ranks(grp, 0);
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scc_mgr_set_dqs_en_phase_all_ranks(grp, 0);
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/* ************************************************************** */
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/* * Step 0 : Determine number of delay taps for each phase tap * */
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dtaps_per_ptap = IO_DELAY_PER_OPA_TAP/IO_DELAY_PER_DQS_EN_DCHAIN_TAP;
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/* Step 0: Determine number of delay taps for each phase tap. */
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dtaps_per_ptap = IO_DELAY_PER_OPA_TAP / IO_DELAY_PER_DQS_EN_DCHAIN_TAP;
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/* ********************************************************* */
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/* * Step 1 : First push vfifo until we get a failing read * */
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/* Step 1: First push vfifo until we get a failing read. */
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find_vfifo_failing_read(grp);
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/* ******************************************************** */
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/* * step 2: find first working phase, increment in ptaps * */
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/* Step 2: Find first working phase, increment in ptaps. */
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work_bgn = 0;
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if (sdr_working_phase(grp, &work_bgn, &d, &p, &i))
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return 0;
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@ -1598,25 +1595,25 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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work_end = work_bgn;
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/*
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* If d is 0 then the working window covers a phase tap and
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* we can follow the old procedure otherwise, we've found the beginning,
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* If d is 0 then the working window covers a phase tap and we can
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* follow the old procedure. Otherwise, we've found the beginning
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* and we need to increment the dtaps until we find the end.
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*/
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if (d == 0) {
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/* ********************************************************* */
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/* * step 3a: if we have room, back off by one and
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increment in dtaps * */
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/*
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* Step 3a: If we have room, back off by one and
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* increment in dtaps.
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*/
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sdr_backup_phase(grp, &work_bgn, &p);
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/* ********************************************************* */
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/* * step 4a: go forward from working phase to non working
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phase, increment in ptaps * */
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/*
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* Step 4a: go forward from working phase to non working
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* phase, increment in ptaps.
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*/
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if (sdr_nonworking_phase(grp, &work_end, &p, &i))
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return 0;
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/* ********************************************************* */
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/* * step 5a: back off one from last, increment in dtaps * */
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/* Step 5a: Back off one from last, increment in dtaps. */
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/* Special case code for backing up a phase */
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if (p == 0) {
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@ -1629,97 +1626,92 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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work_end -= IO_DELAY_PER_OPA_TAP;
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scc_mgr_set_dqs_en_phase_all_ranks(grp, p);
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/* * The actual increment of dtaps is done outside of
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the if/else loop to share code */
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d = 0;
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: p: \
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ptap=%u\n", __func__, __LINE__,
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p);
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debug_cond(DLEVEL == 2, "%s:%d p: ptap=%u\n",
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__func__, __LINE__, p);
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} else {
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/* ******************************************************* */
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/* * step 3-5b: Find the right edge of the window using
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delay taps * */
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: \
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ptap=%u dtap=%u bgn=%u\n", __func__, __LINE__,
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p, d, work_bgn);
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/*
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* Step 3-5b: Find the right edge of the window
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* using delay taps.
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*/
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debug_cond(DLEVEL == 2,
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"%s:%d ptap=%u dtap=%u bgn=%u\n",
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__func__, __LINE__, p, d, work_bgn);
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work_end = work_bgn;
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}
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/* The dtap increment to find the failing edge is done here */
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for (; d <= IO_DQS_EN_DELAY_MAX; d++, work_end +=
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IO_DELAY_PER_DQS_EN_DCHAIN_TAP) {
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: \
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end-2: dtap=%u\n", __func__, __LINE__, d);
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scc_mgr_set_dqs_en_delay_all_ranks(grp, d);
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/* The dtap increment to find the failing edge is done here. */
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for (; d <= IO_DQS_EN_DELAY_MAX;
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d++, work_end += IO_DELAY_PER_DQS_EN_DCHAIN_TAP) {
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debug_cond(DLEVEL == 2, "%s:%d end-2: dtap=%u\n",
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__func__, __LINE__, d);
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if (!rw_mgr_mem_calibrate_read_test_all_ranks(grp, 1,
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PASS_ONE_BIT,
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&bit_chk, 0)) {
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break;
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}
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scc_mgr_set_dqs_en_delay_all_ranks(grp, d);
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if (!rw_mgr_mem_calibrate_read_test_all_ranks(grp, 1,
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PASS_ONE_BIT,
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&bit_chk, 0)) {
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break;
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}
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}
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/* Go back to working dtap */
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if (d != 0)
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work_end -= IO_DELAY_PER_DQS_EN_DCHAIN_TAP;
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: p/d: \
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ptap=%u dtap=%u end=%u\n", __func__, __LINE__,
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p, d-1, work_end);
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debug_cond(DLEVEL == 2,
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"%s:%d p/d: ptap=%u dtap=%u end=%u\n",
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__func__, __LINE__, p, d - 1, work_end);
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if (work_end < work_bgn) {
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/* nil range */
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: end-2: \
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failed\n", __func__, __LINE__);
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debug_cond(DLEVEL == 2, "%s:%d end-2: failed\n",
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__func__, __LINE__);
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return 0;
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}
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: found range [%u,%u]\n",
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debug_cond(DLEVEL == 2, "%s:%d found range [%u,%u]\n",
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__func__, __LINE__, work_bgn, work_end);
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/* *************************************************************** */
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/*
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* * We need to calculate the number of dtaps that equal a ptap
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* * To do that we'll back up a ptap and re-find the edge of the
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* * window using dtaps
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* We need to calculate the number of dtaps that equal a ptap.
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* To do that we'll back up a ptap and re-find the edge of the
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* window using dtaps
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*/
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: calculate dtaps_per_ptap \
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for tracking\n", __func__, __LINE__);
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debug_cond(DLEVEL == 2, "%s:%d calculate dtaps_per_ptap for tracking\n",
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__func__, __LINE__);
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/* Special case code for backing up a phase */
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if (p == 0) {
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p = IO_DQS_EN_PHASE_MAX;
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rw_mgr_decr_vfifo(grp);
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: backedup \
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cycle/phase: p=%u\n", __func__, __LINE__,
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p);
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debug_cond(DLEVEL == 2, "%s:%d backedup cycle/phase: p=%u\n",
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__func__, __LINE__, p);
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} else {
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p = p - 1;
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: backedup \
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phase only: p=%u", __func__, __LINE__,
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p);
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debug_cond(DLEVEL == 2, "%s:%d backedup phase only: p=%u",
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__func__, __LINE__, p);
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}
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scc_mgr_set_dqs_en_phase_all_ranks(grp, p);
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/*
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* Increase dtap until we first see a passing read (in case the
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* window is smaller than a ptap),
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* and then a failing read to mark the edge of the window again
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* window is smaller than a ptap), and then a failing read to
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* mark the edge of the window again.
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*/
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/* Find a passing read */
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: find passing read\n",
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/* Find a passing read. */
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debug_cond(DLEVEL == 2, "%s:%d find passing read\n",
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__func__, __LINE__);
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found_passing_read = 0;
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found_failing_read = 0;
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initial_failing_dtap = d;
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for (; d <= IO_DQS_EN_DELAY_MAX; d++) {
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: testing \
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read d=%u\n", __func__, __LINE__, d);
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debug_cond(DLEVEL == 2, "%s:%d testing read d=%u\n",
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__func__, __LINE__, d);
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scc_mgr_set_dqs_en_delay_all_ranks(grp, d);
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if (rw_mgr_mem_calibrate_read_test_all_ranks(grp, 1,
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@ -1731,12 +1723,12 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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}
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if (found_passing_read) {
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/* Find a failing read */
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: find failing \
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read\n", __func__, __LINE__);
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/* Find a failing read. */
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debug_cond(DLEVEL == 2, "%s:%d find failing read\n",
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__func__, __LINE__);
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for (d = d + 1; d <= IO_DQS_EN_DELAY_MAX; d++) {
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: \
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testing read d=%u\n", __func__, __LINE__, d);
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debug_cond(DLEVEL == 2, "%s:%d testing read d=%u\n",
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__func__, __LINE__, d);
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scc_mgr_set_dqs_en_delay_all_ranks(grp, d);
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if (!rw_mgr_mem_calibrate_read_test_all_ranks
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@ -1746,9 +1738,9 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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}
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}
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} else {
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debug_cond(DLEVEL == 1, "%s:%d find_dqs_en_phase: failed to \
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calculate dtaps", __func__, __LINE__);
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debug_cond(DLEVEL == 1, "per ptap. Fall back on static value\n");
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debug_cond(DLEVEL == 1,
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"%s:%d failed to calculate dtaps per ptap. Fall back on static value\n",
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__func__, __LINE__);
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}
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/*
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@ -1761,14 +1753,12 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
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dtaps_per_ptap = d - initial_failing_dtap;
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writel(dtaps_per_ptap, &sdr_reg_file->dtaps_per_ptap);
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debug_cond(DLEVEL == 2, "%s:%d find_dqs_en_phase: dtaps_per_ptap=%u \
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- %u = %u", __func__, __LINE__, d,
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initial_failing_dtap, dtaps_per_ptap);
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debug_cond(DLEVEL == 2, "%s:%d dtaps_per_ptap=%u - %u = %u",
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__func__, __LINE__, d, initial_failing_dtap, dtaps_per_ptap);
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/* ******************************************** */
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/* * step 6: Find the centre of the window * */
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/* Step 6: Find the centre of the window. */
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if (sdr_find_window_centre(grp, work_bgn, work_end))
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return 0; /* FIXME: Old code, return 0 means failure :-( */
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return 0;
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return 1;
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}
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