GitHub-Mirror/u-boot
2
0
Fork 0
mirror of https://github.com/Fishwaldo/u-boot.git synced 2025-06-05 22:31:36 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

ddr: altera: Clean up sdr_find_window_centre() part 3

Browse source 
Reorder the end of the function a little by moving the conditional
debug output around a little. Rename the function from _centre() to
_center(). Document the function in kerneldoc.

Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut 2015-07-19 04:14:32 +02:00
parent cbb0b7e036
commit 0a13a0fb7a
1 changed files with 20 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
drivers/ddr/altera/sequencer.c
View file

@ -1480,7 +1480,16 @@ static int sdr_nonworking_phase(uint32_t *grp, uint32_t *bit_chk,
} }
} }
static int sdr_find_window_centre(const u32 grp, const u32 work_bgn, /**
* sdr_find_window_center() - Find center of the working DQS window.
* @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, const u32 val)
{ {
u32 bit_chk, work_mid, v = val; u32 bit_chk, work_mid, v = val;
@ -1525,23 +1534,19 @@ static int sdr_find_window_centre(const u32 grp, const u32 work_bgn,
if (rw_mgr_mem_calibrate_read_test_all_ranks(grp, 1, if (rw_mgr_mem_calibrate_read_test_all_ranks(grp, 1,
PASS_ONE_BIT, PASS_ONE_BIT,
&bit_chk, 0)) { &bit_chk, 0)) {
break; debug_cond(DLEVEL == 2,
"%s:%d center: found: vfifo=%u ptap=%u dtap=%u\n",
__func__, __LINE__, v, p, d);
return 0;
} }
/* fiddle with FIFO */ /* Fiddle with FIFO. */
rw_mgr_incr_vfifo(grp, &v); rw_mgr_incr_vfifo(grp, &v);
} }
if (i >= VFIFO_SIZE) { debug_cond(DLEVEL == 2, "%s:%d center: failed.\n",
debug_cond(DLEVEL == 2, "%s:%d center: failed.\n", __func__, __LINE__);
__func__, __LINE__); return -EINVAL;
return 0;
} else {
debug_cond(DLEVEL == 2,
"%s:%d center: found: vfifo=%u ptap=%u dtap=%u\n",
__func__, __LINE__, v, p, d);
return 1;
}
} }
/* find a good dqs enable to use */ /* find a good dqs enable to use */
@ -1759,8 +1764,8 @@ static uint32_t rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase(uint32_t grp)
/* ******************************************** */ /* ******************************************** */
/* * step 6: Find the centre of the window * */ /* * step 6: Find the centre of the window * */
if (sdr_find_window_centre(grp, work_bgn, work_end, v) == 0) if (sdr_find_window_centre(grp, work_bgn, work_end, v))
return 0; return 0; /* FIXME: Old code, return 0 means failure :-( */
return 1; return 1;
} }