You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
3.2 KiB
Diff
91 lines
3.2 KiB
Diff
From f3d460fb85677a5f62324771e5715ceb11726ecc Mon Sep 17 00:00:00 2001
|
|
From: Yangbo Lu <yangbo.lu@nxp.com>
|
|
Date: Thu, 12 Dec 2019 15:52:19 +0800
|
|
Subject: [PATCH] LF-605 mmc: sdhci-of-esdhc: update tuning erratum A-008171
|
|
|
|
There is an official update for eSDHC tuning erratum A-008171.
|
|
This patch is to implement the changes,
|
|
- Affect all revisions of SoC.
|
|
- Changes for tuning window checking.
|
|
- Hardware hits a new condition that tuning succeeds although
|
|
the eSDHC might not have tuned properly for type2 SoCs
|
|
(soc_tuning_erratum_type2[] array in driver). So check
|
|
tuning window after tuning succeeds.
|
|
|
|
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
|
|
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
|
|
---
|
|
drivers/mmc/host/sdhci-of-esdhc.c | 39 ++++++++++++++++++++++++++-------------
|
|
1 file changed, 26 insertions(+), 13 deletions(-)
|
|
|
|
--- a/drivers/mmc/host/sdhci-of-esdhc.c
|
|
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
|
|
@@ -889,20 +889,20 @@ static int esdhc_signal_voltage_switch(s
|
|
}
|
|
|
|
static struct soc_device_attribute soc_tuning_erratum_type1[] = {
|
|
- { .family = "QorIQ T1023", .revision = "1.0", },
|
|
- { .family = "QorIQ T1040", .revision = "1.0", },
|
|
- { .family = "QorIQ T2080", .revision = "1.0", },
|
|
- { .family = "QorIQ LS1021A", .revision = "1.0", },
|
|
+ { .family = "QorIQ T1023", },
|
|
+ { .family = "QorIQ T1040", },
|
|
+ { .family = "QorIQ T2080", },
|
|
+ { .family = "QorIQ LS1021A", },
|
|
{ },
|
|
};
|
|
|
|
static struct soc_device_attribute soc_tuning_erratum_type2[] = {
|
|
- { .family = "QorIQ LS1012A", .revision = "1.0", },
|
|
- { .family = "QorIQ LS1043A", .revision = "1.*", },
|
|
- { .family = "QorIQ LS1046A", .revision = "1.0", },
|
|
- { .family = "QorIQ LS1080A", .revision = "1.0", },
|
|
- { .family = "QorIQ LS2080A", .revision = "1.0", },
|
|
- { .family = "QorIQ LA1575A", .revision = "1.0", },
|
|
+ { .family = "QorIQ LS1012A", },
|
|
+ { .family = "QorIQ LS1043A", },
|
|
+ { .family = "QorIQ LS1046A", },
|
|
+ { .family = "QorIQ LS1080A", },
|
|
+ { .family = "QorIQ LS2080A", },
|
|
+ { .family = "QorIQ LA1575A", },
|
|
{ },
|
|
};
|
|
|
|
@@ -970,13 +970,13 @@ static void esdhc_prepare_sw_tuning(stru
|
|
/* Write 32'hFFFF_FFFF to IRQSTAT register */
|
|
sdhci_writel(host, 0xFFFFFFFF, SDHCI_INT_STATUS);
|
|
|
|
- /* If TBSTAT[15:8]-TBSTAT[7:0] > 4 * div_ratio
|
|
- * or TBSTAT[7:0]-TBSTAT[15:8] > 4 * div_ratio,
|
|
+ /* If TBSTAT[15:8]-TBSTAT[7:0] > (4 * div_ratio) + 2
|
|
+ * or TBSTAT[7:0]-TBSTAT[15:8] > (4 * div_ratio) + 2,
|
|
* then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio
|
|
* and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio.
|
|
*/
|
|
|
|
- if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio)) {
|
|
+ if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio + 2)) {
|
|
*window_start = 8 * esdhc->div_ratio;
|
|
*window_end = 4 * esdhc->div_ratio;
|
|
} else {
|
|
@@ -1049,6 +1049,19 @@ static int esdhc_execute_tuning(struct m
|
|
if (ret)
|
|
break;
|
|
|
|
+ /* For type2 affected platforms of the tuning erratum,
|
|
+ * tuning may succeed although eSDHC might not have
|
|
+ * tuned properly. Need to check tuning window.
|
|
+ */
|
|
+ if (esdhc->quirk_tuning_erratum_type2 &&
|
|
+ !host->tuning_err) {
|
|
+ esdhc_tuning_window_ptr(host, &window_start,
|
|
+ &window_end);
|
|
+ if (abs(window_start - window_end) >
|
|
+ (4 * esdhc->div_ratio + 2))
|
|
+ host->tuning_err = -EAGAIN;
|
|
+ }
|
|
+
|
|
/* If HW tuning fails and triggers erratum,
|
|
* try workaround.
|
|
*/
|