The card_busy callback is important to then add the voltage switch
callback as it allow to verify that the card is done dealing with
the voltage switch
Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
---
drivers/mmc/host/meson-gx-mmc.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index d876b80db27d..33ab341a8b33 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -76,6 +76,7 @@
#define SD_EMMC_STATUS 0x48
#define STATUS_BUSY BIT(31)
+#define STATUS_DATI GENMASK(23, 16)
#define SD_EMMC_IRQ_EN 0x4c
#define IRQ_RXD_ERR_MASK GENMASK(7, 0)
@@ -845,6 +846,17 @@ static void meson_mmc_cfg_init(struct meson_host *host)
writel(cfg, host->regs + SD_EMMC_CFG);
}
+static int meson_mmc_card_busy(struct mmc_host *mmc)
+{
+ struct meson_host *host = mmc_priv(mmc);
+ u32 regval;
+
+ regval = readl(host->regs + SD_EMMC_STATUS);
+
+ /* We are only interrested in lines 0 to 3, so mask the other ones */
+ return !(FIELD_GET(STATUS_DATI, regval) & 0xf);
+}
+
static const struct mmc_host_ops meson_mmc_ops = {
.request = meson_mmc_request,
.set_ios = meson_mmc_set_ios,
@@ -852,6 +864,7 @@ static const struct mmc_host_ops meson_mmc_ops = {
.pre_req = meson_mmc_pre_req,
.post_req = meson_mmc_post_req,
.execute_tuning = meson_mmc_execute_tuning,
+ .card_busy = meson_mmc_card_busy,
};
static int meson_mmc_probe(struct platform_device *pdev)
--
2.9.4
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