diff options
Diffstat (limited to 'drivers/ddr')
| -rw-r--r-- | drivers/ddr/altera/sequencer.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/ddr/altera/sequencer.c b/drivers/ddr/altera/sequencer.c index 1122cfa71d..0b76ba29db 100644 --- a/drivers/ddr/altera/sequencer.c +++ b/drivers/ddr/altera/sequencer.c @@ -503,12 +503,15 @@ static void scc_mgr_zero_all(void) writel(0, &sdr_scc_mgr->update); } -static void scc_set_bypass_mode(uint32_t write_group, uint32_t mode) +/** + * scc_set_bypass_mode() - Set bypass mode and trigger SCC update + * @write_group: Write group + * + * Set bypass mode and trigger SCC update. + */ +static void scc_set_bypass_mode(const u32 write_group) { - /* mode = 0 : Do NOT bypass - Half Rate Mode */ - /* mode = 1 : Bypass - Full Rate Mode */ - - /* only need to set once for all groups, pins, dq, dqs, dm */ + /* Only needed once to set all groups, pins, DQ, DQS, DM. */ if (write_group == 0) { debug_cond(DLEVEL == 1, "%s:%d Setting HHP Extras\n", __func__, __LINE__); @@ -516,17 +519,18 @@ static void scc_set_bypass_mode(uint32_t write_group, uint32_t mode) debug_cond(DLEVEL == 1, "%s:%d Done Setting HHP Extras\n", __func__, __LINE__); } - /* multicast to all DQ enables */ + + /* Multicast to all DQ enables. */ writel(0xff, &sdr_scc_mgr->dq_ena); writel(0xff, &sdr_scc_mgr->dm_ena); - /* update current DQS IO enable */ + /* Update current DQS IO enable. */ writel(0, &sdr_scc_mgr->dqs_io_ena); - /* update the DQS logic */ + /* Update the DQS logic. */ writel(write_group, &sdr_scc_mgr->dqs_ena); - /* hit update */ + /* Hit update. */ writel(0, &sdr_scc_mgr->update); } @@ -3314,11 +3318,10 @@ static uint32_t mem_calibrate(void) mem_config(); - uint32_t bypass_mode = 0x1; for (i = 0; i < RW_MGR_MEM_IF_READ_DQS_WIDTH; i++) { writel(i, SDR_PHYGRP_SCCGRP_ADDRESS | SCC_MGR_GROUP_COUNTER_OFFSET); - scc_set_bypass_mode(i, bypass_mode); + scc_set_bypass_mode(i); } if ((dyn_calib_steps & CALIB_SKIP_ALL) == CALIB_SKIP_ALL) { |