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fusee: improve SDR104 frequency and support AUTOCMD23

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This commit is contained in:
Kate J. Temkin 2018-05-21 04:24:50 -06:00
parent bf2c6dff25
commit ac7ee45493
1 changed files with 11 additions and 4 deletions
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15
fusee/fusee-primary/src/sdmmc.c
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@ -140,7 +140,7 @@ enum sdmmc_clock_dividers {
MMC_CLOCK_DIVIDER_SDR12 = 31, // 16.5, from the TRM table
MMC_CLOCK_DIVIDER_SDR25 = 15, // 8.5, from the table
MMC_CLOCK_DIVIDER_SDR50 = 7, // 4.5, from the table
MMC_CLOCK_DIVIDER_SDR104 = 3, // 2, from the datasheet
MMC_CLOCK_DIVIDER_SDR104 = 2, // 2, from the datasheet
/* Clock dividers: MMC */
MMC_CLOCK_DIVIDER_HS26 = 30, // 16, from the TRM table
@ -217,8 +217,9 @@ enum sdmmc_register_bits {
MMC_TRANSFER_LIMIT_BLOCK_COUNT = (1 << 1),
MMC_TRANSFER_MULTIPLE_BLOCKS = (1 << 5),
MMC_TRANSFER_AUTO_CMD_MASK = (0x3 << 2),
MMC_TRANSFER_AUTO_CMD = (0x3 << 2),
MMC_TRANSFER_AUTO_CMD12 = (0x1 << 2),
MMC_TRANSFER_AUTO_CMD23 = (0x2 << 2),
MMC_TRANSFER_AUTO_CMD = (0x3 << 2),
MMC_TRANSFER_CARD_TO_HOST = (1 << 4),
/* Interrupt status */
@ -1950,8 +1951,14 @@ static void sdmmc_prepare_command_data(struct mmc *mmc, uint16_t blocks,
// If this command should automatically terminate, set the host to
// terminate it after the block span is complete.
if (auto_terminate)
to_write |= MMC_TRANSFER_AUTO_CMD12;
if (auto_terminate) {
// If we're in SDR104, use AUTO_CMD23 intead of AUTO_CMD12,
// per the host controller specification.
if (mmc->operating_speed == SDMMC_SPEED_SDR104)
to_write |= MMC_TRANSFER_AUTO_CMD23;
else
to_write |= MMC_TRANSFER_AUTO_CMD12;
}
// If this is a read, set the READ mode.
if (!is_write)