linux-kernel - [PATCH v2 1/4] mmc: mmci: Support any block sizes for ux500v2 and qcom variant

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1408446847-1604-1-git-send-email-srinivas.kandagatla@linaro.org>
Date:	Tue, 19 Aug 2014 12:14:07 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	linux-mmc@...r.kernel.org
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v2 1/4] mmc: mmci: Support any block sizes for ux500v2 and qcom variant

From: Ulf Hansson <ulf.hansson@...aro.org>

For the ux500v2 variant of the PL18x block, any block sizes are
supported. This will make it possible to decrease data overhead
for SDIO transfers.

This patch is based on Ulf Hansson patch
http://www.spinics.net/lists/linux-mmc/msg12160.html

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
	enabled this support on qcom variant.

Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 drivers/mmc/host/mmci.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index c11cb05..3089fba 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -77,6 +77,7 @@ static unsigned int fmax = 515633;
  * @qcom_fifo: enables qcom specific fifo pio read logic.
  * @reversed_irq_handling: handle data irq before cmd irq.
  * @qcom_dml: enables qcom specific dma glue for dma transfers.
+ * @any_blksize: true if block any sizes are supported
  */
 struct variant_data {
 	unsigned int		clkreg;
@@ -102,6 +103,7 @@ struct variant_data {
 	bool			qcom_fifo;
 	bool			reversed_irq_handling;
 	bool			qcom_dml;
+	bool			any_blksize;
 };
 
 static struct variant_data variant_arm = {
@@ -194,6 +196,7 @@ static struct variant_data variant_ux500v2 = {
 	.pwrreg_clkgate		= true,
 	.busy_detect		= true,
 	.pwrreg_nopower		= true,
+	.any_blksize		= true,
 };
 
 static struct variant_data variant_qcom = {
@@ -212,6 +215,7 @@ static struct variant_data variant_qcom = {
 	.explicit_mclk_control	= true,
 	.qcom_fifo		= true,
 	.qcom_dml		= true,
+	.any_blksize		= true,
 };
 
 static int mmci_card_busy(struct mmc_host *mmc)
@@ -239,10 +243,11 @@ static int mmci_card_busy(struct mmc_host *mmc)
 static int mmci_validate_data(struct mmci_host *host,
 			      struct mmc_data *data)
 {
+	struct variant_data *variant = host->variant;
+
 	if (!data)
 		return 0;
-
-	if (!is_power_of_2(data->blksz)) {
+	if (!is_power_of_2(data->blksz) && !variant->any_blksize) {
 		dev_err(mmc_dev(host->mmc),
 			"unsupported block size (%d bytes)\n", data->blksz);
 		return -EINVAL;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/