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mmc: tmio: support IP-builtin card detection logic

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A card detect GPIO is set up only for platforms with "cd-gpios"
DT property or TMIO_MMC_USE_GPIO_CD flag.  However, the driver
core always uses mmc_gpio_get_cd, which just fails with -ENOSYS
if ctx->cd_gpio is unset.

The bit 5 of the status register provides the current signal level
of the CD line.  Allow to use it if the GPIO is unused.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Masahiro Yamada 2018-01-18 01:28:12 +09:00 committed by Ulf Hansson
parent 788778b0d2
commit 497d1f965c
1 changed files with 12 additions and 1 deletions
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13
drivers/mmc/host/tmio_mmc_core.c
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@ -1066,6 +1066,14 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc)
TMIO_STAT_WRPROTECT);
}
static int tmio_mmc_get_cd(struct mmc_host *mmc)
{
struct tmio_mmc_host *host = mmc_priv(mmc);
return !!(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) &
TMIO_STAT_SIGSTATE);
}
static int tmio_multi_io_quirk(struct mmc_card *card,
unsigned int direction, int blk_size)
{
@ -1081,7 +1089,7 @@ static const struct mmc_host_ops tmio_mmc_ops = {
.request = tmio_mmc_request,
.set_ios = tmio_mmc_set_ios,
.get_ro = tmio_mmc_get_ro,
.get_cd = mmc_gpio_get_cd,
.get_cd = tmio_mmc_get_cd,
.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
.multi_io_quirk = tmio_multi_io_quirk,
.hw_reset = tmio_mmc_hw_reset,
@ -1234,6 +1242,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
if (mmc_can_gpio_ro(mmc))
_host->ops.get_ro = mmc_gpio_get_ro;
if (mmc_can_gpio_cd(mmc))
_host->ops.get_cd = mmc_gpio_get_cd;
_host->native_hotplug = !(mmc_can_gpio_cd(mmc) ||
mmc->caps & MMC_CAP_NEEDS_POLL ||
!mmc_card_is_removable(mmc));