In case the cyclic framework is enabled, poll the card detect of already initialized cards and deinitialize them in case they are removed. Since the card initialization is a longer process and card initialization is done on first access to an uninitialized card anyway, avoid initializing newly detected uninitialized cards in the cyclic callback.
Signed-off-by: Marek Vasut marek.vasut+renesas@mailbox.org --- Cc: Jaehoon Chung jh80.chung@samsung.com Cc: Peng Fan peng.fan@nxp.com Cc: Simon Glass sjg@chromium.org --- V2: Move the cyclic registration/unregistration into mmc init/deinit V3: Replace if (CONFIG_IS_ENABLED(CYCLIC)...) with #if as the former does not work with structure members V4: Stuff the code with CONFIG_IS_ENABLED() variants to avoid #ifdefs --- drivers/mmc/mmc.c | 32 ++++++++++++++++++++++++++++++++ include/mmc.h | 3 +++ 2 files changed, 35 insertions(+)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index eb5010c1465..e90ffd5dcd1 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -2985,6 +2985,20 @@ static int mmc_complete_init(struct mmc *mmc) return err; }
+static void __maybe_unused mmc_cyclic_cd_poll(void *ctx) +{ + struct mmc *m = ctx; + + if (!m->has_init) + return; + + if (mmc_getcd(m)) + return; + + mmc_deinit(m); + m->has_init = 0; +} + int mmc_init(struct mmc *mmc) { int err = 0; @@ -3007,6 +3021,19 @@ int mmc_init(struct mmc *mmc) if (err) pr_info("%s: %d, time %lu\n", __func__, err, get_timer(start));
+ if (CONFIG_IS_ENABLED(CYCLIC, (!mmc->cyclic), (NULL))) { + /* Register cyclic function for card detect polling */ + CONFIG_IS_ENABLED(CYCLIC, + (mmc->cyclic = cyclic_register(mmc_cyclic_cd_poll, + 100 * 1000, + mmc->cfg->name, mmc))); + if (CONFIG_IS_ENABLED(CYCLIC, (!mmc->cyclic), (NULL))) { + printf("Failed to register %s CD poll function\n", + mmc->cfg->name); + err = -EINVAL; + } + } + return err; }
@@ -3014,6 +3041,11 @@ int mmc_deinit(struct mmc *mmc) { u32 caps_filtered;
+ if (CONFIG_IS_ENABLED(CYCLIC, (mmc->cyclic), (NULL))) { + cyclic_unregister(CONFIG_IS_ENABLED(CYCLIC, (mmc->cyclic), NULL)); + CONFIG_IS_ENABLED(CYCLIC, (mmc->cyclic = NULL)); + } + if (!CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) && !CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) && !CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)) diff --git a/include/mmc.h b/include/mmc.h index 1022db3ffa7..706566fa1ad 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -14,6 +14,7 @@ #include <linux/sizes.h> #include <linux/compiler.h> #include <linux/dma-direction.h> +#include <cyclic.h> #include <part.h>
struct bd_info; @@ -739,6 +740,8 @@ struct mmc { u8 hs400_tuning;
enum bus_mode user_speed_mode; /* input speed mode from user */ + + CONFIG_IS_ENABLED(CYCLIC, (struct cyclic_info *cyclic)); };
#if CONFIG_IS_ENABLED(DM_MMC)