diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-03-27 21:57:11 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:41:56 +0200 |
| commit | 3d03f6a99a8de552e094445dde341ca4b4d4326a (patch) | |
| tree | 4cdfddcbd22081777c7b00cfa1e78f850790bfb4 /drivers/mmc | |
| parent | edf985790659503eedd5736ba89ad7e9fd754cf0 (diff) | |
| download | linux-3d03f6a99a8de552e094445dde341ca4b4d4326a.tar.bz2 | |
mmc: meson-gx: factor out setting block size
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>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index f5dd5cc71040..0de320084c45 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); } |