From: Chunyan Zhang <zhang.chunyan@linaro.org>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
Orson Zhai <orsonzhai@gmail.com>,
Baolin Wang <baolin.wang@linaro.org>,
Billows Wu <billows.wu@unisoc.com>,
Jason Wu <jason.wu@unisoc.com>,
Chunyan Zhang <zhang.lyra@gmail.com>
Subject: [PATCH V5 08/10] mmc: sdhci: SDMA may use Auto-CMD23 in v4 mode
Date: Thu, 16 Aug 2018 15:54:22 +0800 [thread overview]
Message-ID: <1534406064-10065-9-git-send-email-zhang.chunyan@linaro.org> (raw)
In-Reply-To: <1534406064-10065-1-git-send-email-zhang.chunyan@linaro.org>
When Host Version 4 Enable is set to 1, SDMA uses ADMA System Address
register (05Fh-058h) instead of using register (000h-004h) to indicate
its system address of data location. The register (000h-004h) is
re-assigned to 32-bit Block Count and Auto CMD23 argument, so then SDMA
may use Auto CMD23.
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
---
drivers/mmc/host/sdhci.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 06c2ae9..4e375ba 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3851,10 +3851,14 @@ int sdhci_setup_host(struct sdhci_host *host)
if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
host->flags |= SDHCI_AUTO_CMD12;
- /* Auto-CMD23 stuff only works in ADMA or PIO. */
+ /*
+ * For v3 mode, Auto-CMD23 stuff only works in ADMA or PIO;
+ * For v4 mode, SDMA may use Auto-CMD23 as well.
+ */
if ((host->version >= SDHCI_SPEC_300) &&
((host->flags & SDHCI_USE_ADMA) ||
- !(host->flags & SDHCI_USE_SDMA)) &&
+ (!host->v4_mode && !(host->flags & SDHCI_USE_SDMA)) ||
+ (host->v4_mode && (host->flags & SDHCI_USE_SDMA))) &&
!(host->quirks2 & SDHCI_QUIRK2_ACMD23_BROKEN)) {
host->flags |= SDHCI_AUTO_CMD23;
DBG("Auto-CMD23 available\n");
--
2.7.4
next prev parent reply other threads:[~2018-08-16 7:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 7:54 [PATCH V5 00/10] mmc: add support for sdhci 4.0 Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 01/10] mmc: sdhci: Add version V4 definition Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 02/10] mmc: sdhci: Add sd host v4 mode Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 03/10] mmc: sdhci: Change SDMA address register for " Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 04/10] mmc: sdhci: Add ADMA2 64-bit addressing support for V4 mode Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 05/10] mmc: sdhci: Add 32-bit block count support for v4 mode Chunyan Zhang
2018-08-23 12:48 ` Adrian Hunter
2018-08-16 7:54 ` [PATCH V5 06/10] mmc: sdhci: Disable auto-CMD23 if stuff bits is set in CMD23 argument Chunyan Zhang
2018-08-16 8:19 ` Chunyan Zhang
2018-08-23 12:50 ` Adrian Hunter
2018-08-27 10:07 ` Ulf Hansson
2018-08-27 11:07 ` Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 07/10] mmc: sdhci: Add Auto CMD Auto Select support Chunyan Zhang
2018-08-23 12:55 ` Adrian Hunter
2018-08-24 6:52 ` Chunyan Zhang
2018-08-24 6:55 ` Adrian Hunter
2018-08-16 7:54 ` Chunyan Zhang [this message]
2018-08-16 7:54 ` [PATCH V5 09/10] mmc: sdhci-sprd: Add Spreadtrum's initial host controller Chunyan Zhang
2018-08-16 7:54 ` [PATCH V5 10/10] dt-bindings: sdhci-sprd: Add bindings for the sdhci-sprd controller Chunyan Zhang
[not found] ` <CAAfSe-sJYD4_9KGo+z8UzYHkdP15qz4=5U42_cT9tA9+B4bk1Q@mail.gmail.com>
2018-08-22 7:16 ` [PATCH V5 00/10] mmc: add support for sdhci 4.0 Chunyan Zhang (张春艳)
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