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fusee: fix multiple-block SDMMC transfers

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This commit is contained in:
Kate J. Temkin 2018-05-04 16:15:18 -06:00
parent e5fff14689
commit 932a5bd645
1 changed files with 13 additions and 7 deletions
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20
fusee/fusee-primary/src/sdmmc.c
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@ -172,7 +172,9 @@ enum sdmmc_register_bits {
MMC_TRANSFER_DMA_ENABLE = (1 << 0), MMC_TRANSFER_DMA_ENABLE = (1 << 0),
MMC_TRANSFER_LIMIT_BLOCK_COUNT = (1 << 1), MMC_TRANSFER_LIMIT_BLOCK_COUNT = (1 << 1),
MMC_TRANSFER_MULTIPLE_BLOCKS = (1 << 5), MMC_TRANSFER_MULTIPLE_BLOCKS = (1 << 5),
MMC_TRANSFER_AUTO_CMD_MASK = (0x3 << 2),
MMC_TRANSFER_AUTO_CMD = (0x3 << 2), MMC_TRANSFER_AUTO_CMD = (0x3 << 2),
MMC_TRANSFER_AUTO_CMD12 = (0x1 << 2),
MMC_TRANSFER_CARD_TO_HOST = (1 << 4), MMC_TRANSFER_CARD_TO_HOST = (1 << 4),
/* Interrupt status */ /* Interrupt status */
@ -1150,17 +1152,21 @@ static void sdmmc_prepare_command_data(struct mmc *mmc, uint16_t blocks,
mmc->regs->argument = argument; mmc->regs->argument = argument;
if (blocks) { if (blocks) {
uint32_t to_write = MMC_TRANSFER_LIMIT_BLOCK_COUNT | MMC_TRANSFER_AUTO_CMD; uint32_t to_write = MMC_TRANSFER_LIMIT_BLOCK_COUNT;
// If this controller should use DMA, set that up. // If this controller should use DMA, set that up.
if (mmc->use_dma) if (mmc->use_dma)
to_write |= MMC_TRANSFER_DMA_ENABLE; to_write |= MMC_TRANSFER_DMA_ENABLE;
// If this is a multi-block datagram, indicate so. // If this is a multi-block datagram, indicate so.
// Also, configure the host to automatically stop the card when transfers are complete.
if (blocks > 1) if (blocks > 1)
to_write |= MMC_TRANSFER_MULTIPLE_BLOCKS; to_write |= MMC_TRANSFER_MULTIPLE_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 this is a read, set the READ mode. // If this is a read, set the READ mode.
if (!is_write) if (!is_write)
to_write |= MMC_TRANSFER_CARD_TO_HOST; to_write |= MMC_TRANSFER_CARD_TO_HOST;
@ -1294,6 +1300,7 @@ static int sdmmc_handle_command_response(struct mmc *mmc,
* @param blocks_to_transfer The number of SDMMC blocks to be transferred with the given command, * @param blocks_to_transfer The number of SDMMC blocks to be transferred with the given command,
* or 0 to indicate that this command should not expect response data. * or 0 to indicate that this command should not expect response data.
* @param is_write True iff the given command issues data _to_ the card, instead of vice versa. * @param is_write True iff the given command issues data _to_ the card, instead of vice versa.
* @param auto_terminate True iff the gven command needs to be terminated with e.g. CMD12
* @param data_buffer A byte buffer that either contains the data to be sent, or which should * @param data_buffer A byte buffer that either contains the data to be sent, or which should
* receive data, depending on the is_write argument. * receive data, depending on the is_write argument.
* *
@ -1363,7 +1370,7 @@ static int sdmmc_send_command(struct mmc *mmc, enum sdmmc_command command,
// Copy the response received to the output buffer, if applicable. // Copy the response received to the output buffer, if applicable.
rc = sdmmc_handle_command_response(mmc, response_type, response_buffer); rc = sdmmc_handle_command_response(mmc, response_type, response_buffer);
if (rc) { if (rc) {
mmc_print(mmc, "failed to handle CMD%d response! (%d)", rc); mmc_print(mmc, "failed to handle %s response! (%d)", sdmmc_get_command_string(command), rc);
return rc; return rc;
} }
@ -1376,7 +1383,7 @@ static int sdmmc_send_command(struct mmc *mmc, enum sdmmc_command command,
// Wait for the transfer to be complete... // Wait for the transfer to be complete...
rc = sdmmc_wait_for_transfer_completion(mmc); rc = sdmmc_wait_for_transfer_completion(mmc);
if (rc) { if (rc) {
mmc_print(mmc, "failed to complete CMD%d data stage via DMA (%d)", command, rc); mmc_print(mmc, "failed to complete %s data stage via DMA (%d)", sdmmc_get_command_string(command), command, rc);
sdmmc_enable_interrupts(mmc, false); sdmmc_enable_interrupts(mmc, false);
return rc; return rc;
} }
@ -1586,7 +1593,7 @@ static int sdmmc_read_and_parse_ext_csd(struct mmc *mmc)
// Read the single EXT CSD block. // Read the single EXT CSD block.
rc = sdmmc_send_command(mmc, CMD_SEND_EXT_CSD, MMC_RESPONSE_LEN48, rc = sdmmc_send_command(mmc, CMD_SEND_EXT_CSD, MMC_RESPONSE_LEN48,
MMC_CHECKS_ALL, 0, NULL, 1, false, true, ext_csd); MMC_CHECKS_ALL, 0, NULL, 1, false, false, ext_csd);
if (rc) { if (rc) {
mmc_print(mmc, "ERROR: failed to read the extended CSD!"); mmc_print(mmc, "ERROR: failed to read the extended CSD!");
return rc; return rc;
@ -2301,7 +2308,6 @@ int sdmmc_select_partition(struct mmc *mmc, enum sdmmc_partition partition)
*/ */
int sdmmc_read(struct mmc *mmc, void *buffer, uint32_t block, unsigned int count) int sdmmc_read(struct mmc *mmc, void *buffer, uint32_t block, unsigned int count)
{ {
// Determine if we need to perform a single-block or multi-block read.
uint32_t command = (count == 1) ? CMD_READ_SINGLE_BLOCK : CMD_READ_MULTIPLE_BLOCK; uint32_t command = (count == 1) ? CMD_READ_SINGLE_BLOCK : CMD_READ_MULTIPLE_BLOCK;
// Determine the argument, which indicates which address we're reading/writing. // Determine the argument, which indicates which address we're reading/writing.
@ -2314,7 +2320,7 @@ int sdmmc_read(struct mmc *mmc, void *buffer, uint32_t block, unsigned int count
} }
// Execute the relevant read. // Execute the relevant read.
return sdmmc_send_command(mmc, command, MMC_RESPONSE_LEN48, MMC_CHECKS_ALL, extent, NULL, count, false, true, buffer); return sdmmc_send_command(mmc, command, MMC_RESPONSE_LEN48, MMC_CHECKS_ALL, extent, NULL, count, false, count > 1, buffer);
} }