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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>
This commit is contained in:
Heiner Kallweit 2017-03-22 22:33:47 +01:00 committed by Ulf Hansson
parent 00412ddc4a
commit a322febe37
1 changed files with 24 additions and 31 deletions
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55
drivers/mmc/host/meson-gx-mmc.c
View File

@ -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)