All of lore.kernel.org
 help / color / mirror / Atom feed
From: Heiner Kallweit <hkallweit1@gmail.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
	Kevin Hilman <khilman@baylibre.com>
Cc: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
	linux-amlogic@lists.infradead.org
Subject: [PATCH 1/2] mmc: meson-gx: factor out setting block size
Date: Mon, 27 Mar 2017 21:57:11 +0200	[thread overview]
Message-ID: <b9a9a85b-8975-abca-7901-b557ea7ccc13@gmail.com> (raw)

Factor out setting the block size. This also contributes to reducing
complexity of function meson_mmc_start_cmd.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 42 ++++++++++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index f5dd5cc7..0de32008 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -431,12 +431,36 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
 	mmc_request_done(host->mmc, mrq);
 }
 
+static void meson_mmc_set_blksz(struct mmc_host *mmc, unsigned int blksz)
+{
+	struct meson_host *host = mmc_priv(mmc);
+	u32 cfg, blksz_old;
+
+	cfg = readl(host->regs + SD_EMMC_CFG);
+	blksz_old = FIELD_GET(CFG_BLK_LEN_MASK, cfg);
+
+	if (!is_power_of_2(blksz))
+		dev_err(host->dev, "blksz %u is not a power of 2\n", blksz);
+
+	blksz = ilog2(blksz);
+
+	/* check if block-size matches, if not update */
+	if (blksz == blksz_old)
+		return;
+
+	dev_dbg(host->dev, "%s: update blk_len %d -> %d\n", __func__,
+		blksz_old, blksz);
+
+	cfg &= ~CFG_BLK_LEN_MASK;
+	cfg |= FIELD_PREP(CFG_BLK_LEN_MASK, blksz);
+	writel(cfg, host->regs + SD_EMMC_CFG);
+}
+
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
 	struct mmc_data *data = cmd->data;
-	u32 cfg, cmd_cfg = 0, cmd_data = 0;
-	u8 blk_len;
+	u32 cmd_cfg = 0, cmd_data = 0;
 	unsigned int xfer_bytes = 0;
 
 	/* Setup descriptors */
@@ -470,19 +494,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 			cmd_cfg |= CMD_CFG_BLOCK_MODE;
 			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK,
 					      data->blocks);
-
-			/* check if block-size matches, if not update */
-			cfg = readl(host->regs + SD_EMMC_CFG);
-			blk_len = FIELD_GET(CFG_BLK_LEN_MASK, cfg);
-			if (blk_len != ilog2(data->blksz)) {
-				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
-					__func__, blk_len,
-					ilog2(data->blksz));
-				blk_len = ilog2(data->blksz);
-				cfg &= ~CFG_BLK_LEN_MASK;
-				cfg |= FIELD_PREP(CFG_BLK_LEN_MASK, blk_len);
-				writel(cfg, host->regs + SD_EMMC_CFG);
-			}
+			meson_mmc_set_blksz(mmc, data->blksz);
 		} else {
 			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK, data->blksz);
 		}
-- 
2.12.1


WARNING: multiple messages have this Message-ID (diff)
From: hkallweit1@gmail.com (Heiner Kallweit)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH 1/2] mmc: meson-gx: factor out setting block size
Date: Mon, 27 Mar 2017 21:57:11 +0200	[thread overview]
Message-ID: <b9a9a85b-8975-abca-7901-b557ea7ccc13@gmail.com> (raw)

Factor out setting the block size. This also contributes to reducing
complexity of function meson_mmc_start_cmd.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 42 ++++++++++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index f5dd5cc7..0de32008 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -431,12 +431,36 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
 	mmc_request_done(host->mmc, mrq);
 }
 
+static void meson_mmc_set_blksz(struct mmc_host *mmc, unsigned int blksz)
+{
+	struct meson_host *host = mmc_priv(mmc);
+	u32 cfg, blksz_old;
+
+	cfg = readl(host->regs + SD_EMMC_CFG);
+	blksz_old = FIELD_GET(CFG_BLK_LEN_MASK, cfg);
+
+	if (!is_power_of_2(blksz))
+		dev_err(host->dev, "blksz %u is not a power of 2\n", blksz);
+
+	blksz = ilog2(blksz);
+
+	/* check if block-size matches, if not update */
+	if (blksz == blksz_old)
+		return;
+
+	dev_dbg(host->dev, "%s: update blk_len %d -> %d\n", __func__,
+		blksz_old, blksz);
+
+	cfg &= ~CFG_BLK_LEN_MASK;
+	cfg |= FIELD_PREP(CFG_BLK_LEN_MASK, blksz);
+	writel(cfg, host->regs + SD_EMMC_CFG);
+}
+
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
 	struct mmc_data *data = cmd->data;
-	u32 cfg, cmd_cfg = 0, cmd_data = 0;
-	u8 blk_len;
+	u32 cmd_cfg = 0, cmd_data = 0;
 	unsigned int xfer_bytes = 0;
 
 	/* Setup descriptors */
@@ -470,19 +494,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 			cmd_cfg |= CMD_CFG_BLOCK_MODE;
 			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK,
 					      data->blocks);
-
-			/* check if block-size matches, if not update */
-			cfg = readl(host->regs + SD_EMMC_CFG);
-			blk_len = FIELD_GET(CFG_BLK_LEN_MASK, cfg);
-			if (blk_len != ilog2(data->blksz)) {
-				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
-					__func__, blk_len,
-					ilog2(data->blksz));
-				blk_len = ilog2(data->blksz);
-				cfg &= ~CFG_BLK_LEN_MASK;
-				cfg |= FIELD_PREP(CFG_BLK_LEN_MASK, blk_len);
-				writel(cfg, host->regs + SD_EMMC_CFG);
-			}
+			meson_mmc_set_blksz(mmc, data->blksz);
 		} else {
 			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK, data->blksz);
 		}
-- 
2.12.1

             reply	other threads:[~2017-03-27 19:57 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-27 19:57 Heiner Kallweit [this message]
2017-03-27 19:57 ` [PATCH 1/2] mmc: meson-gx: factor out setting block size Heiner Kallweit
2017-03-27 20:02 ` [PATCH 2/2] mmc: meson-gx: factor out setting response configuration bits Heiner Kallweit
2017-03-27 20:02   ` Heiner Kallweit
2017-03-28 15:05   ` Kevin Hilman
2017-03-28 15:05     ` Kevin Hilman
2017-03-30 19:31   ` Ulf Hansson
2017-03-30 19:31     ` Ulf Hansson
2017-03-28 15:04 ` [PATCH 1/2] mmc: meson-gx: factor out setting block size Kevin Hilman
2017-03-28 15:04   ` Kevin Hilman
2017-03-30 19:31 ` Ulf Hansson
2017-03-30 19:31   ` Ulf Hansson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=b9a9a85b-8975-abca-7901-b557ea7ccc13@gmail.com \
    --to=hkallweit1@gmail.com \
    --cc=khilman@baylibre.com \
    --cc=linux-amlogic@lists.infradead.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=ulf.hansson@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.