From: Wolfram Sang <wsa@xxxxxxxxxx>
Make use of the EXTOP bit in R-Car Gen3 SoCs to have a twice as large
busy wait duration.
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/renesas_sdhi_core.c | 20 ++++++++++++++++++++
drivers/mmc/host/tmio_mmc.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 153767054c05..38f028e70633 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -561,6 +561,7 @@ static int renesas_sdhi_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_io
static void renesas_sdhi_reset(struct tmio_mmc_host *host)
{
struct renesas_sdhi *priv = host_to_priv(host);
+ u16 val;
if (priv->scc_ctl) {
renesas_sdhi_disable_scc(host->mmc);
@@ -573,6 +574,21 @@ static void renesas_sdhi_reset(struct tmio_mmc_host *host)
}
sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, TMIO_MASK_INIT_RCAR2);
+
+ if (sd_ctrl_read16(host, CTL_VERSION) >= SDHI_VER_GEN3_SD) {
+ val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);
+ val |= CARD_OPT_EXTOP;
+ sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, val);
+ }
+}
+
+static unsigned int renesas_sdhi_gen3_get_cycles(struct tmio_mmc_host *host)
+{
+ u16 num, val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);
+
+ num = (val & CARD_OPT_TOP_MASK) >> CARD_OPT_TOP_SHIFT;
+ return 1 << ((val & CARD_OPT_EXTOP ? 14 : 13) + num);
+
}
#define SH_MOBILE_SDHI_MIN_TAP_ROW 3
@@ -1067,6 +1083,10 @@ int renesas_sdhi_probe(struct platform_device *pdev,
quirks->hs400_calib_table + 1);
}
+ /* these have an EXTOP bit */
+ if (ver >= SDHI_VER_GEN3_SD)
+ host->get_timeout_cycles = renesas_sdhi_gen3_get_cycles;
+
/* Enable tuning iff we have an SCC and a supported mode */
if (of_data && of_data->scc_offset &&
(host->mmc->caps & MMC_CAP_UHS_SDR104 ||
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index f60559bc413a..784fa6ed5843 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -82,7 +82,9 @@
/* Definitions for values the CTL_SD_MEM_CARD_OPT register can take */
#define CARD_OPT_TOP_MASK 0xf0
#define CARD_OPT_TOP_SHIFT 4
+#define CARD_OPT_EXTOP BIT(9) /* first appeared on R-Car Gen3 SDHI */
#define CARD_OPT_WIDTH8 BIT(13)
+#define CARD_OPT_ALWAYS1 BIT(14)
#define CARD_OPT_WIDTH BIT(15)
/* Definitions for values the CTL_SDIO_STATUS register can take */
--
2.28.0
