+#if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG)
+const char *mmc_mode_name(enum bus_mode mode)
+{
+ static const char *const names[] = {
+ [MMC_LEGACY] = "MMC legacy",
+ [SD_LEGACY] = "SD Legacy",
+ [MMC_HS] = "MMC High Speed (26MHz)",
+ [SD_HS] = "SD High Speed (50MHz)",
+ [UHS_SDR12] = "UHS SDR12 (25MHz)",
+ [UHS_SDR25] = "UHS SDR25 (50MHz)",
+ [UHS_SDR50] = "UHS SDR50 (100MHz)",
+ [UHS_SDR104] = "UHS SDR104 (208MHz)",
+ [UHS_DDR50] = "UHS DDR50 (50MHz)",
+ [MMC_HS_52] = "MMC High Speed (52MHz)",
+ [MMC_DDR_52] = "MMC DDR52 (52MHz)",
+ [MMC_HS_200] = "HS200 (200MHz)",
+ };
+
+ if (mode >= MMC_MODES_END)
+ return "Unknown mode";
+ else
+ return names[mode];
+}
+#endif
+
+static uint mmc_mode2freq(struct mmc *mmc, enum bus_mode mode)
+{
+ static const int freqs[] = {
+ [SD_LEGACY] = 25000000,
+ [MMC_HS] = 26000000,
+ [SD_HS] = 50000000,
+ [UHS_SDR12] = 25000000,
+ [UHS_SDR25] = 50000000,
+ [UHS_SDR50] = 100000000,
+ [UHS_SDR104] = 208000000,
+ [UHS_DDR50] = 50000000,
+ [MMC_HS_52] = 52000000,
+ [MMC_DDR_52] = 52000000,
+ [MMC_HS_200] = 200000000,
+ };
+
+ if (mode == MMC_LEGACY)
+ return mmc->legacy_speed;
+ else if (mode >= MMC_MODES_END)
+ return 0;
+ else
+ return freqs[mode];
+}
+
+static int mmc_select_mode(struct mmc *mmc, enum bus_mode mode)
+{
+ mmc->selected_mode = mode;
+ mmc->tran_speed = mmc_mode2freq(mmc, mode);
+ mmc->ddr_mode = mmc_is_mode_ddr(mode);
+ debug("selecting mode %s (freq : %d MHz)\n", mmc_mode_name(mode),
+ mmc->tran_speed / 1000000);
+ return 0;
+}
+