mirror of
https://github.com/arabine/open-story-teller.git
synced 2025-12-07 01:15:14 +01:00
459 lines
15 KiB
C
459 lines
15 KiB
C
/*------------------------------------------------------------------------*/
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/* STM32F100: MMCv3/SDv1/SDv2 (SPI mode) control module */
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/*------------------------------------------------------------------------*/
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/*
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/ Copyright (C) 2018, ChaN, all right reserved.
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/
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/ * This software is a free software and there is NO WARRANTY.
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/ * No restriction on use. You can use, modify and redistribute it for
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/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
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/ * Redistributions of source code must retain the above copyright notice.
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/
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/-------------------------------------------------------------------------*/
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/*--------------------------------------------------------------------------
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Module Private Functions
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---------------------------------------------------------------------------*/
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#include "ost_hal.h"
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#include "ff.h"
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#include "diskio.h"
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#define MMC_CD 1 /* Card detect (yes:true, no:false, default:true) */
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#define MMC_WP 0 /* Write protected (yes:true, no:false, default:false) */
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/* MMC card type flags (MMC_GET_TYPE) */
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#define CT_MMC3 0x01 /* MMC ver 3 */
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#define CT_MMC4 0x02 /* MMC ver 4+ */
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#define CT_MMC 0x03 /* MMC */
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#define CT_SDC1 0x02 /* SDC ver 1 */
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#define CT_SDC2 0x04 /* SDC ver 2+ */
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#define CT_SDC 0x0C /* SDC */
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#define CT_BLOCK 0x10 /* Block addressing */
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/* MMC/SD command */
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#define CMD0 (0) /* GO_IDLE_STATE */
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#define CMD1 (1) /* SEND_OP_COND (MMC) */
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#define ACMD41 (0x80+41) /* SEND_OP_COND (SDC) */
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#define CMD8 (8) /* SEND_IF_COND */
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#define CMD9 (9) /* SEND_CSD */
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#define CMD10 (10) /* SEND_CID */
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#define CMD12 (12) /* STOP_TRANSMISSION */
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#define ACMD13 (0x80+13) /* SD_STATUS (SDC) */
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#define CMD16 (16) /* SET_BLOCKLEN */
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#define CMD17 (17) /* READ_SINGLE_BLOCK */
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#define CMD18 (18) /* READ_MULTIPLE_BLOCK */
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#define CMD23 (23) /* SET_BLOCK_COUNT (MMC) */
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#define ACMD23 (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */
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#define CMD24 (24) /* WRITE_BLOCK */
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#define CMD25 (25) /* WRITE_MULTIPLE_BLOCK */
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#define CMD32 (32) /* ERASE_ER_BLK_START */
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#define CMD33 (33) /* ERASE_ER_BLK_END */
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#define CMD38 (38) /* ERASE */
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#define CMD55 (55) /* APP_CMD */
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#define CMD58 (58) /* READ_OCR */
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static volatile DSTATUS Stat = STA_NOINIT; /* Physical drive status */
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static volatile UINT Timer1, Timer2; /* 1kHz decrement timer stopped at zero (disk_timerproc()) */
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static BYTE CardType; /* Card type flags */
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/*-----------------------------------------------------------------------*/
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/* Wait for card ready */
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/*-----------------------------------------------------------------------*/
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static int wait_ready ( /* 1:Ready, 0:Timeout */
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UINT wt /* Timeout [ms] */
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)
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{
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BYTE d;
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Timer2 = wt;
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do {
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d = sdcard_spi_transfer(0xFF);
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/* This loop takes a time. Insert rot_rdq() here for multitask envilonment. */
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} while (d != 0xFF && Timer2); /* Wait for card goes ready or timeout */
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return (d == 0xFF) ? 1 : 0;
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}
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/*-----------------------------------------------------------------------*/
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/* Deselect card and release SPI */
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/*-----------------------------------------------------------------------*/
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static void deselect (void)
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{
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sdcard_cs_high(); /* Set CS# high */
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sdcard_spi_transfer(0xFF); /* Dummy clock (force DO hi-z for multiple slave SPI) */
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}
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/*-----------------------------------------------------------------------*/
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/* Select card and wait for ready */
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/*-----------------------------------------------------------------------*/
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static int select (void) /* 1:OK, 0:Timeout */
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{
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sdcard_cs_low(); /* Set CS# low */
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sdcard_spi_transfer(0xFF); /* Dummy clock (force DO enabled) */
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if (wait_ready(500)) return 1; /* Wait for card ready */
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deselect();
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return 0; /* Timeout */
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}
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/*-----------------------------------------------------------------------*/
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/* Receive a data packet from the MMC */
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/*-----------------------------------------------------------------------*/
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static int rcvr_datablock ( /* 1:OK, 0:Error */
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BYTE *buff, /* Data buffer */
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UINT btr /* Data block length (byte) */
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)
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{
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BYTE token;
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Timer1 = 200;
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do { /* Wait for DataStart token in timeout of 200ms */
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token = sdcard_spi_transfer(0xFF);
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/* This loop will take a time. Insert rot_rdq() here for multitask envilonment. */
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} while ((token == 0xFF) && Timer1);
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if(token != 0xFE) return 0; /* Function fails if invalid DataStart token or timeout */
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sdcard_spi_recv_multi(buff, btr); /* Store trailing data to the buffer */
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sdcard_spi_transfer(0xFF); sdcard_spi_transfer(0xFF); /* Discard CRC */
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return 1; /* Function succeeded */
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}
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/*-----------------------------------------------------------------------*/
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/* Send a command packet to the MMC */
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/*-----------------------------------------------------------------------*/
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static BYTE send_cmd ( /* Return value: R1 resp (bit7==1:Failed to send) */
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BYTE cmd, /* Command index */
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DWORD arg /* Argument */
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)
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{
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BYTE n, res;
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if (cmd & 0x80) { /* Send a CMD55 prior to ACMD<n> */
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cmd &= 0x7F;
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res = send_cmd(CMD55, 0);
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if (res > 1) return res;
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}
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/* Select the card and wait for ready except to stop multiple block read */
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if (cmd != CMD12) {
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deselect();
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if (!select()) return 0xFF;
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}
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/* Send command packet */
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sdcard_spi_transfer(0x40 | cmd); /* Start + command index */
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sdcard_spi_transfer((BYTE)(arg >> 24)); /* Argument[31..24] */
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sdcard_spi_transfer((BYTE)(arg >> 16)); /* Argument[23..16] */
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sdcard_spi_transfer((BYTE)(arg >> 8)); /* Argument[15..8] */
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sdcard_spi_transfer((BYTE)arg); /* Argument[7..0] */
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n = 0x01; /* Dummy CRC + Stop */
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if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */
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if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */
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sdcard_spi_transfer(n);
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/* Receive command resp */
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if (cmd == CMD12) sdcard_spi_transfer(0xFF); /* Diacard following one byte when CMD12 */
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n = 10; /* Wait for response (10 bytes max) */
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do {
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res = sdcard_spi_transfer(0xFF);
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} while ((res & 0x80) && --n);
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return res; /* Return received response */
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}
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/*--------------------------------------------------------------------------
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Public Functions
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---------------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------*/
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/* Initialize disk drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
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BYTE drv /* Physical drive number (0) */
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)
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{
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BYTE n, cmd, ty, ocr[4];
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if (drv) return STA_NOINIT; /* Supports only drive 0 */
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if (Stat & STA_NODISK) return Stat; /* Is card existing in the soket? */
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sdcard_set_slow_clock();
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for (n = 10; n; n--) sdcard_spi_transfer(0xFF); /* Send 80 dummy clocks */
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ty = 0;
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if (send_cmd(CMD0, 0) == 1) { /* Put the card SPI/Idle state */
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Timer1 = 1000; /* Initialization timeout = 1 sec */
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if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2? */
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for (n = 0; n < 4; n++) ocr[n] = sdcard_spi_transfer(0xFF); /* Get 32 bit return value of R7 resp */
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if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* Is the card supports vcc of 2.7-3.6V? */
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while (Timer1 && send_cmd(ACMD41, 1UL << 30)) ; /* Wait for end of initialization with ACMD41(HCS) */
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if (Timer1 && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
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for (n = 0; n < 4; n++) ocr[n] = sdcard_spi_transfer(0xFF);
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ty = (ocr[0] & 0x40) ? CT_SDC2 | CT_BLOCK : CT_SDC2; /* Card id SDv2 */
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}
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}
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} else { /* Not SDv2 card */
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if (send_cmd(ACMD41, 0) <= 1) { /* SDv1 or MMC? */
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ty = CT_SDC1; cmd = ACMD41; /* SDv1 (ACMD41(0)) */
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} else {
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ty = CT_MMC3; cmd = CMD1; /* MMCv3 (CMD1(0)) */
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}
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while (Timer1 && send_cmd(cmd, 0)) ; /* Wait for end of initialization */
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if (!Timer1 || send_cmd(CMD16, 512) != 0) /* Set block length: 512 */
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ty = 0;
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}
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}
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CardType = ty; /* Card type */
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deselect();
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if (ty) { /* OK */
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sdcard_set_fast_clock(); /* Set fast clock */
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Stat &= ~STA_NOINIT; /* Clear STA_NOINIT flag */
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} else { /* Failed */
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Stat = STA_NOINIT;
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}
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return Stat;
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}
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/*-----------------------------------------------------------------------*/
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/* Get disk status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
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BYTE drv /* Physical drive number (0) */
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)
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{
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if (drv) return STA_NOINIT; /* Supports only drive 0 */
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return Stat; /* Return disk status */
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}
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/*-----------------------------------------------------------------------*/
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/* Read sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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BYTE drv, /* Physical drive number (0) */
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BYTE *buff, /* Pointer to the data buffer to store read data */
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LBA_t sector, /* Start sector number (LBA) */
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UINT count /* Number of sectors to read (1..128) */
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)
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{
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DWORD sect = (DWORD)sector;
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if (drv || !count) return RES_PARERR; /* Check parameter */
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if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
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if (!(CardType & CT_BLOCK)) sect *= 512; /* LBA ot BA conversion (byte addressing cards) */
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if (count == 1) { /* Single sector read */
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if ((send_cmd(CMD17, sect) == 0) /* READ_SINGLE_BLOCK */
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&& rcvr_datablock(buff, 512)) {
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count = 0;
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}
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}
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else { /* Multiple sector read */
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if (send_cmd(CMD18, sect) == 0) { /* READ_MULTIPLE_BLOCK */
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do {
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if (!rcvr_datablock(buff, 512)) break;
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buff += 512;
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} while (--count);
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send_cmd(CMD12, 0); /* STOP_TRANSMISSION */
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}
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}
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deselect();
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return count ? RES_ERROR : RES_OK; /* Return result */
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}
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous drive controls other than data read/write */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_ioctl (
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BYTE drv, /* Physical drive number (0) */
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BYTE cmd, /* Control command code */
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void *buff /* Pointer to the conrtol data */
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)
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{
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DRESULT res;
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BYTE n, csd[16];
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DWORD st, ed, csize;
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LBA_t *dp;
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if (drv) return RES_PARERR; /* Check parameter */
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if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
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res = RES_ERROR;
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switch (cmd) {
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case CTRL_SYNC : /* Wait for end of internal write process of the drive */
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if (select()) res = RES_OK;
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break;
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case GET_SECTOR_COUNT : /* Get drive capacity in unit of sector (DWORD) */
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if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
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if ((csd[0] >> 6) == 1) { /* SDC CSD ver 2 */
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csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
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*(LBA_t*)buff = csize << 10;
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} else { /* SDC CSD ver 1 or MMC */
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n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
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csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
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*(LBA_t*)buff = csize << (n - 9);
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}
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res = RES_OK;
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}
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break;
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case GET_BLOCK_SIZE : /* Get erase block size in unit of sector (DWORD) */
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if (CardType & CT_SDC2) { /* SDC ver 2+ */
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if (send_cmd(ACMD13, 0) == 0) { /* Read SD status */
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sdcard_spi_transfer(0xFF);
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if (rcvr_datablock(csd, 16)) { /* Read partial block */
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for (n = 64 - 16; n; n--) sdcard_spi_transfer(0xFF); /* Purge trailing data */
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*(DWORD*)buff = 16UL << (csd[10] >> 4);
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res = RES_OK;
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}
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}
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} else { /* SDC ver 1 or MMC */
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if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) { /* Read CSD */
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if (CardType & CT_SDC1) { /* SDC ver 1.XX */
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*(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
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} else { /* MMC */
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*(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
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}
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res = RES_OK;
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}
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}
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break;
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case CTRL_TRIM : /* Erase a block of sectors (used when _USE_ERASE == 1) */
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if (!(CardType & CT_SDC)) break; /* Check if the card is SDC */
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if (disk_ioctl(drv, MMC_GET_CSD, csd)) break; /* Get CSD */
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if (!(csd[10] & 0x40)) break; /* Check if ERASE_BLK_EN = 1 */
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dp = buff; st = (DWORD)dp[0]; ed = (DWORD)dp[1]; /* Load sector block */
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if (!(CardType & CT_BLOCK)) {
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st *= 512; ed *= 512;
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}
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if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000)) { /* Erase sector block */
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res = RES_OK; /* FatFs does not check result of this command */
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}
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break;
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/* Following commands are never used by FatFs module */
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case MMC_GET_TYPE: /* Get MMC/SDC type (BYTE) */
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*(BYTE*)buff = CardType;
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res = RES_OK;
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break;
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case MMC_GET_CSD: /* Read CSD (16 bytes) */
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if (send_cmd(CMD9, 0) == 0 && rcvr_datablock((BYTE*)buff, 16)) { /* READ_CSD */
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res = RES_OK;
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}
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break;
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case MMC_GET_CID: /* Read CID (16 bytes) */
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if (send_cmd(CMD10, 0) == 0 && rcvr_datablock((BYTE*)buff, 16)) { /* READ_CID */
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res = RES_OK;
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}
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break;
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case MMC_GET_OCR: /* Read OCR (4 bytes) */
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if (send_cmd(CMD58, 0) == 0) { /* READ_OCR */
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for (n = 0; n < 4; n++) *(((BYTE*)buff) + n) = sdcard_spi_transfer(0xFF);
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res = RES_OK;
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}
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break;
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case MMC_GET_SDSTAT: /* Read SD status (64 bytes) */
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if (send_cmd(ACMD13, 0) == 0) { /* SD_STATUS */
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sdcard_spi_transfer(0xFF);
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if (rcvr_datablock((BYTE*)buff, 64)) res = RES_OK;
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}
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break;
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default:
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res = RES_PARERR;
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}
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deselect();
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return res;
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}
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/*-----------------------------------------------------------------------*/
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/* Device timer function */
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/*-----------------------------------------------------------------------*/
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/* This function must be called from timer interrupt routine in period
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/ of 1 ms to generate card control timing.
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*/
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void disk_timerproc (void)
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{
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WORD n;
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BYTE s;
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n = Timer1; /* 1kHz decrement timer stopped at 0 */
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if (n) Timer1 = --n;
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n = Timer2;
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if (n) Timer2 = --n;
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s = Stat;
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if (MMC_WP) { /* Write protected */
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s |= STA_PROTECT;
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} else { /* Write enabled */
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s &= ~STA_PROTECT;
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}
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if (MMC_CD) { /* Card is in socket */
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s &= ~STA_NODISK;
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} else { /* Socket empty */
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s |= (STA_NODISK | STA_NOINIT);
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}
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Stat = s;
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}
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