diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2017-08-21 10:41:28 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-08-30 16:03:42 +0300 |
| commit | 4a5fc11945af753f3e565db61f80976bb1fcddc7 (patch) | |
| tree | 44e34bad40e1df5484e8d4eb7007176db916cc98 /drivers/mmc/host/sdhci.c | |
| parent | 52899b99767a34050b94d5e2d4b295def2164903 (diff) | |
| download | linux-4a5fc11945af753f3e565db61f80976bb1fcddc7.tar.xz | |
mmc: sdhci: Tidy reading 136-bit responses
Read each register only once and move the code to a separate function so
that it is not jammed against the 80 column margin.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 5afc72f09a2a..1cea35d8bc79 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1173,24 +1173,32 @@ void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) } EXPORT_SYMBOL_GPL(sdhci_send_command); +static void sdhci_read_rsp_136(struct sdhci_host *host, struct mmc_command *cmd) +{ + int i, reg; + + for (i = 0; i < 4; i++) { + reg = SDHCI_RESPONSE + (3 - i) * 4; + cmd->resp[i] = sdhci_readl(host, reg); + } + + /* CRC is stripped so we need to do some shifting */ + for (i = 0; i < 4; i++) { + cmd->resp[i] <<= 8; + if (i != 3) + cmd->resp[i] |= cmd->resp[i + 1] >> 24; + } +} + static void sdhci_finish_command(struct sdhci_host *host) { struct mmc_command *cmd = host->cmd; - int i; host->cmd = NULL; if (cmd->flags & MMC_RSP_PRESENT) { if (cmd->flags & MMC_RSP_136) { - /* CRC is stripped so we need to do some shifting. */ - for (i = 0;i < 4;i++) { - cmd->resp[i] = sdhci_readl(host, - SDHCI_RESPONSE + (3-i)*4) << 8; - if (i != 3) - cmd->resp[i] |= - sdhci_readb(host, - SDHCI_RESPONSE + (3-i)*4-1); - } + sdhci_read_rsp_136(host, cmd); } else { cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE); } |