diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-03-23 00:33:47 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 22:41:45 +0300 |
| commit | a322febe37432443b8d0adb0b630a9f91961152c (patch) | |
| tree | 36f67d613319ed7549fb8e8cf89b0a754cdf18c9 /drivers/mmc/host/meson-gx-mmc.c | |
| parent | 00412ddc4ae929419a64bc9766205aac0467e664 (diff) | |
| download | linux-a322febe37432443b8d0adb0b630a9f91961152c.tar.xz | |
mmc: meson-gx: improve variable usage in meson_mmc_start_cmd
Simplify the code by using two variables instead of a struct sd_emmc_desc.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Diffstat (limited to 'drivers/mmc/host/meson-gx-mmc.c')
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 55 |
1 files changed, 24 insertions, 31 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 1b20ec1a1a90..8bf3eb540eb7 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -425,45 +425,39 @@ 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; - struct sd_emmc_desc *desc, desc_tmp; - u32 cfg; + u32 cfg, cmd_cfg = 0, cmd_data = 0; u8 blk_len, cmd_cfg_timeout; unsigned int xfer_bytes = 0; /* Setup descriptors */ dma_rmb(); - desc = &desc_tmp; - memset(desc, 0, sizeof(struct sd_emmc_desc)); - desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) << - CMD_CFG_CMD_INDEX_SHIFT; - desc->cmd_cfg |= CMD_CFG_OWNER; /* owned by CPU */ - desc->cmd_arg = cmd->arg; + cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) << + CMD_CFG_CMD_INDEX_SHIFT; + cmd_cfg |= CMD_CFG_OWNER; /* owned by CPU */ /* Response */ if (cmd->flags & MMC_RSP_PRESENT) { if (cmd->flags & MMC_RSP_136) - desc->cmd_cfg |= CMD_CFG_RESP_128; - desc->cmd_cfg |= CMD_CFG_RESP_NUM; - desc->cmd_resp = 0; + cmd_cfg |= CMD_CFG_RESP_128; + cmd_cfg |= CMD_CFG_RESP_NUM; if (!(cmd->flags & MMC_RSP_CRC)) - desc->cmd_cfg |= CMD_CFG_RESP_NOCRC; + cmd_cfg |= CMD_CFG_RESP_NOCRC; if (cmd->flags & MMC_RSP_BUSY) - desc->cmd_cfg |= CMD_CFG_R1B; + cmd_cfg |= CMD_CFG_R1B; } else { - desc->cmd_cfg |= CMD_CFG_NO_RESP; + cmd_cfg |= CMD_CFG_NO_RESP; } /* data? */ if (data) { - desc->cmd_cfg |= CMD_CFG_DATA_IO; + cmd_cfg |= CMD_CFG_DATA_IO; if (data->blocks > 1) { - desc->cmd_cfg |= CMD_CFG_BLOCK_MODE; - desc->cmd_cfg |= - (data->blocks & CMD_CFG_LENGTH_MASK) << - CMD_CFG_LENGTH_SHIFT; + cmd_cfg |= CMD_CFG_BLOCK_MODE; + cmd_cfg |= (data->blocks & CMD_CFG_LENGTH_MASK) << + CMD_CFG_LENGTH_SHIFT; /* check if block-size matches, if not update */ cfg = readl(host->regs + SD_EMMC_CFG); @@ -479,15 +473,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd) writel(cfg, host->regs + SD_EMMC_CFG); } } else { - desc->cmd_cfg |= - (data->blksz & CMD_CFG_LENGTH_MASK) << - CMD_CFG_LENGTH_SHIFT; + cmd_cfg |= (data->blksz & CMD_CFG_LENGTH_MASK) << + CMD_CFG_LENGTH_SHIFT; } data->bytes_xfered = 0; xfer_bytes = data->blksz * data->blocks; if (data->flags & MMC_DATA_WRITE) { - desc->cmd_cfg |= CMD_CFG_DATA_WR; + cmd_cfg |= CMD_CFG_DATA_WR; WARN_ON(xfer_bytes > host->bounce_buf_size); sg_copy_to_buffer(data->sg, data->sg_len, host->bounce_buf, xfer_bytes); @@ -495,24 +488,24 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd) dma_wmb(); } - desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK; + cmd_data = host->bounce_dma_addr & CMD_DATA_MASK; cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA); } else { cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT); } - desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) << - CMD_CFG_TIMEOUT_SHIFT; + cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) << + CMD_CFG_TIMEOUT_SHIFT; host->cmd = cmd; /* Last descriptor */ - desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN; - writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG); - writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT); - writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP); + cmd_cfg |= CMD_CFG_END_OF_CHAIN; + writel(cmd_cfg, host->regs + SD_EMMC_CMD_CFG); + writel(cmd_data, host->regs + SD_EMMC_CMD_DAT); + writel(0, host->regs + SD_EMMC_CMD_RSP); wmb(); /* ensure descriptor is written before kicked */ - writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG); + writel(cmd->arg, host->regs + SD_EMMC_CMD_ARG); } static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) |