-static const KBlockVTable sd_unbuffered_vt =
-{
- .readDirect = sd_readDirect,
- .writeBlock = sd_writeBlock,
-
- .error = sd_error,
- .clearerr = sd_clearerr,
-};
-
-static const KBlockVTable sd_buffered_vt =
-{
- .readDirect = sd_readDirect,
- .writeBlock = sd_writeBlock,
-
- .readBuf = kblock_swReadBuf,
- .writeBuf = kblock_swWriteBuf,
- .load = kblock_swLoad,
- .store = kblock_swStore,
-
- .error = sd_error,
- .clearerr = sd_clearerr,
-};
-
-#define SD_GO_IDLE_STATE 0x40
-#define SD_GO_IDLE_STATE_CRC 0x95
-#define SD_SEND_OP_COND 0x41
-#define SD_SEND_OP_COND_CRC 0xF9
-
-#define SD_START_DELAY ms_to_ticks(10)
-#define SD_INIT_TIMEOUT ms_to_ticks(1000)
-#define SD_IDLE_RETRIES 4
-
-static bool sd_blockInit(Sd *sd, KFile *ch)
-{
- ASSERT(sd);
- ASSERT(ch);
- memset(sd, 0, sizeof(*sd));
- DB(sd->b.priv.type = KBT_SD);
- sd->ch = ch;
-
- SD_CS_INIT();
- SD_CS_OFF();
-
- /* Wait a few moments for supply voltage to stabilize */
- timer_delay(SD_START_DELAY);
-
- /* Give 80 clk pulses to wake up the card */
- for (int i = 0; i < 10; i++)
- kfile_putc(0xff, ch);
- kfile_flush(ch);
-
- for (int i = 0; i < SD_IDLE_RETRIES; i++)
- {
- SD_SELECT(sd);
- sd->r1 = sd_sendCommand(sd, SD_GO_IDLE_STATE, 0, SD_GO_IDLE_STATE_CRC);
- sd_select(sd, false);
-
- if (sd->r1 == SD_IN_IDLE)
- break;
- }
-
- if (sd->r1 != SD_IN_IDLE)
- {
- LOG_ERR("go_idle_state failed: %04X\n", sd->r1);
- return false;
- }
-
- ticks_t start = timer_clock();
-
- /* Wait for card to start */
- do
- {
- SD_SELECT(sd);
- sd->r1 = sd_sendCommand(sd, SD_SEND_OP_COND, 0, SD_SEND_OP_COND_CRC);
- sd_select(sd, false);
- cpu_relax();
- }
- while (sd->r1 != 0 && timer_clock() - start < SD_INIT_TIMEOUT);
-
- if (sd->r1)
- {
- LOG_ERR("send_op_cond failed: %04X\n", sd->r1);
- return false;
- }
-
- sd->r1 = sd_setBlockLen(sd, SD_DEFAULT_BLOCKLEN);
-
- if (sd->r1)
- {
- LOG_ERR("setBlockLen failed: %04X\n", sd->r1);
- return false;
- }
-
- CardCSD csd;
- sd->r1 = sd_getCSD(sd, &csd);
- if (sd->r1)
- {
- LOG_ERR("getCSD failed: %04X\n", sd->r1);
- return false;
- }
-
- sd->b.blk_size = SD_DEFAULT_BLOCKLEN;
- sd->b.blk_cnt = csd.block_num * (csd.block_len / SD_DEFAULT_BLOCKLEN);
- LOG_INFO("blk_size %d, blk_cnt %ld\n", sd->b.blk_size, sd->b.blk_cnt);
-
-
-#if CONFIG_SD_AUTOASSIGN_FAT
- disk_assignDrive(&sd->b, 0);
-#endif
-
- return true;
-}
-
-bool sd_initUnbuf(Sd *sd, KFile *ch)
-{
- if (sd_blockInit(sd, ch))
- {
- sd->b.priv.vt = &sd_unbuffered_vt;
- return true;
- }
- else
- return false;
-}
-
-static uint8_t sd_buf[SD_DEFAULT_BLOCKLEN];
-
-bool sd_initBuf(Sd *sd, KFile *ch)
-{
- if (sd_blockInit(sd, ch))
- {
- sd->b.priv.buf = sd_buf;
- sd->b.priv.flags |= KB_BUFFERED;
- sd->b.priv.vt = &sd_buffered_vt;
- sd->b.priv.vt->load(&sd->b, 0);
- return true;
- }
- else
- return false;
-}