/* * (C) Copyright 2003 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include #include #include #include "jz_mmc.h" static int sd2_0 = 0; static int mmc_ready = 0; static int use_4bit; /* Use 4-bit data bus */ /* * MMC Events */ #define MMC_EVENT_NONE 0x00 /* No events */ #define MMC_EVENT_RX_DATA_DONE 0x01 /* Rx data done */ #define MMC_EVENT_TX_DATA_DONE 0x02 /* Tx data done */ #define MMC_EVENT_PROG_DONE 0x04 /* Programming is done */ #define MMC_IRQ_MASK() \ do { \ REG_MSC_IMASK = 0xffff; \ REG_MSC_IREG = 0xffff; \ } while (0) /* * GPIO definition */ #if defined(CONFIG_SAKC) #define __msc_init_io() \ do { \ __gpio_as_input(GPIO_SD_CD_N); \ } while (0) #else #define __msc_init_io() \ do { \ __gpio_as_output(GPIO_SD_VCC_EN_N); \ __gpio_as_input(GPIO_SD_CD_N); \ } while (0) #define __msc_enable_power() \ do { \ __gpio_clear_pin(GPIO_SD_VCC_EN_N); \ } while (0) #define __msc_disable_power() \ do { \ __gpio_set_pin(GPIO_SD_VCC_EN_N); \ } while (0) #endif /* CONFIG_SAKE */ #define __msc_card_detected() \ ({ \ int detected = 1; \ __gpio_as_input(GPIO_SD_CD_N); \ __gpio_disable_pull(GPIO_SD_CD_N); \ if (!__gpio_get_pin(GPIO_SD_CD_N)) \ detected = 0; \ detected; \ }) /* * Local functions */ extern int fat_register_device(block_dev_desc_t *dev_desc, int part_no); static block_dev_desc_t mmc_dev; block_dev_desc_t * mmc_get_dev(int dev) { return ((block_dev_desc_t *)&mmc_dev); } /* Stop the MMC clock and wait while it happens */ static inline int jz_mmc_stop_clock(void) { int timeout = 1000; REG_MSC_STRPCL = MSC_STRPCL_CLOCK_CONTROL_STOP; while (timeout && (REG_MSC_STAT & MSC_STAT_CLK_EN)) { timeout--; if (timeout == 0) return MMC_ERROR_TIMEOUT; udelay(1); } return MMC_NO_ERROR; } /* Start the MMC clock and operation */ static inline int jz_mmc_start_clock(void) { REG_MSC_STRPCL = MSC_STRPCL_CLOCK_CONTROL_START | MSC_STRPCL_START_OP; return MMC_NO_ERROR; } static inline u32 jz_mmc_calc_clkrt(int is_sd, u32 rate) { u32 clkrt = 0; u32 clk_src = is_sd ? 24000000 : 16000000; while (rate < clk_src) { clkrt ++; clk_src >>= 1; } return clkrt; } /* Set the MMC clock frequency */ void jz_mmc_set_clock(int sd, u32 rate) { jz_mmc_stop_clock(); /* Select clock source of MSC */ __cpm_select_msc_clk(sd); /* Set clock dividor of MSC */ REG_MSC_CLKRT = jz_mmc_calc_clkrt(sd, rate); } static int jz_mmc_check_status(struct mmc_request *request) { u32 status = REG_MSC_STAT; /* Checking for response or data timeout */ if (status & (MSC_STAT_TIME_OUT_RES | MSC_STAT_TIME_OUT_READ)) { printf("MMC/SD timeout, MMC_STAT 0x%x CMD %d\n", status, request->cmd); return MMC_ERROR_TIMEOUT; } /* Checking for CRC error */ if (status & (MSC_STAT_CRC_READ_ERROR | MSC_STAT_CRC_WRITE_ERROR | MSC_STAT_CRC_RES_ERR)) { printf("MMC/CD CRC error, MMC_STAT 0x%x\n", status); return MMC_ERROR_CRC; } return MMC_NO_ERROR; } /* Obtain response to the command and store it to response buffer */ static void jz_mmc_get_response(struct mmc_request *request) { int i; u8 *buf; u32 data; debug("fetch response for request %d, cmd %d\n", request->rtype, request->cmd); buf = request->response; request->result = MMC_NO_ERROR; switch (request->rtype) { case RESPONSE_R1: case RESPONSE_R1B: case RESPONSE_R6: case RESPONSE_R3: case RESPONSE_R4: case RESPONSE_R5: { data = REG_MSC_RES; buf[0] = (data >> 8) & 0xff; buf[1] = data & 0xff; data = REG_MSC_RES; buf[2] = (data >> 8) & 0xff; buf[3] = data & 0xff; data = REG_MSC_RES; buf[4] = data & 0xff; debug("request %d, response [%02x %02x %02x %02x %02x]\n", request->rtype, buf[0], buf[1], buf[2], buf[3], buf[4]); break; } case RESPONSE_R2_CID: case RESPONSE_R2_CSD: { for (i = 0; i < 16; i += 2) { data = REG_MSC_RES; buf[i] = (data >> 8) & 0xff; buf[i+1] = data & 0xff; } debug("request %d, response [", request->rtype); #if CONFIG_MMC_DEBUG_VERBOSE > 2 if (g_mmc_debug >= 3) { int n; for (n = 0; n < 17; n++) printk("%02x ", buf[n]); printk("]\n"); } #endif break; } case RESPONSE_NONE: debug("No response\n"); break; default: debug("unhandled response type for request %d\n", request->rtype); break; } } static int jz_mmc_receive_data(struct mmc_request *req) { u32 stat, timeout, data, cnt; u8 *buf = req->buffer; u32 wblocklen = (u32)(req->block_len + 3) >> 2; /* length in word */ timeout = 0x3ffffff; while (timeout) { timeout--; stat = REG_MSC_STAT; if (stat & MSC_STAT_TIME_OUT_READ) return MMC_ERROR_TIMEOUT; else if (stat & MSC_STAT_CRC_READ_ERROR) return MMC_ERROR_CRC; else if (!(stat & MSC_STAT_DATA_FIFO_EMPTY) || (stat & MSC_STAT_DATA_FIFO_AFULL)) { /* Ready to read data */ break; } udelay(1); } if (!timeout) return MMC_ERROR_TIMEOUT; /* Read data from RXFIFO. It could be FULL or PARTIAL FULL */ cnt = wblocklen; while (cnt) { data = REG_MSC_RXFIFO; { *buf++ = (u8)(data >> 0); *buf++ = (u8)(data >> 8); *buf++ = (u8)(data >> 16); *buf++ = (u8)(data >> 24); } cnt --; while (cnt && (REG_MSC_STAT & MSC_STAT_DATA_FIFO_EMPTY)) ; } return MMC_NO_ERROR; } static int jz_mmc_transmit_data(struct mmc_request *req) { #if 0 u32 nob = req->nob; u32 wblocklen = (u32)(req->block_len + 3) >> 2; /* length in word */ u8 *buf = req->buffer; u32 *wbuf = (u32 *)buf; u32 waligned = (((u32)buf & 0x3) == 0); /* word aligned ? */ u32 stat, timeout, data, cnt; for (nob; nob >= 1; nob--) { timeout = 0x3FFFFFF; while (timeout) { timeout--; stat = REG_MSC_STAT; if (stat & (MSC_STAT_CRC_WRITE_ERROR | MSC_STAT_CRC_WRITE_ERROR_NOSTS)) return MMC_ERROR_CRC; else if (!(stat & MSC_STAT_DATA_FIFO_FULL)) { /* Ready to write data */ break; } udelay(1); } if (!timeout) return MMC_ERROR_TIMEOUT; /* Write data to TXFIFO */ cnt = wblocklen; while (cnt) { while (REG_MSC_STAT & MSC_STAT_DATA_FIFO_FULL) ; if (waligned) { REG_MSC_TXFIFO = *wbuf++; } else { data = *buf++ | (*buf++ << 8) | (*buf++ << 16) | (*buf++ << 24); REG_MSC_TXFIFO = data; } cnt--; } } #endif return MMC_NO_ERROR; } /* * Name: int jz_mmc_exec_cmd() * Function: send command to the card, and get a response * Input: struct mmc_request *req : MMC/SD request * Output: 0: right >0: error code */ int jz_mmc_exec_cmd(struct mmc_request *request) { u32 cmdat = 0, events = 0; int retval, timeout = 0x3fffff; /* Indicate we have no result yet */ request->result = MMC_NO_RESPONSE; if (request->cmd == MMC_CIM_RESET) { /* On reset, 1-bit bus width */ use_4bit = 0; /* Reset MMC/SD controller */ __msc_reset(); /* On reset, drop MMC clock down */ jz_mmc_set_clock(0, MMC_CLOCK_SLOW); /* On reset, stop MMC clock */ jz_mmc_stop_clock(); } if (request->cmd == MMC_CMD_SEND_OP_COND) { debug("Have an MMC card\n"); /* always use 1bit for MMC */ use_4bit = 0; } if (request->cmd == SET_BUS_WIDTH) { if (request->arg == 0x2) { printf("Use 4-bit bus width\n"); use_4bit = 1; } else { printf("Use 1-bit bus width\n"); use_4bit = 0; } } /* stop clock */ jz_mmc_stop_clock(); /* mask all interrupts */ REG_MSC_IMASK = 0xffff; /* clear status */ REG_MSC_IREG = 0xffff; /* use 4-bit bus width when possible */ if (use_4bit) cmdat |= MSC_CMDAT_BUS_WIDTH_4BIT; /* Set command type and events */ switch (request->cmd) { /* MMC core extra command */ case MMC_CIM_RESET: cmdat |= MSC_CMDAT_INIT; /* Initialization sequence sent prior to command */ break; /* bc - broadcast - no response */ case MMC_CMD_GO_IDLE_STATE: case MMC_CMD_SET_DSR: break; /* bcr - broadcast with response */ case MMC_CMD_SEND_OP_COND: case MMC_CMD_ALL_SEND_CID: case MMC_GO_IRQ_STATE: break; /* adtc - addressed with data transfer */ case MMC_READ_DAT_UNTIL_STOP: case MMC_CMD_READ_SINGLE_BLOCK: case MMC_CMD_READ_MULTIPLE_BLOCK: case SD_CMD_APP_SEND_SCR: cmdat |= MSC_CMDAT_DATA_EN | MSC_CMDAT_READ; events = MMC_EVENT_RX_DATA_DONE; break; case MMC_WRITE_DAT_UNTIL_STOP: case MMC_CMD_WRITE_SINGLE_BLOCK: case MMC_CMD_WRITE_MULTIPLE_BLOCK: case MMC_PROGRAM_CID: case MMC_PROGRAM_CSD: case MMC_SEND_WRITE_PROT: case MMC_GEN_CMD: case MMC_LOCK_UNLOCK: cmdat |= MSC_CMDAT_DATA_EN | MSC_CMDAT_WRITE; events = MMC_EVENT_TX_DATA_DONE | MMC_EVENT_PROG_DONE; break; case MMC_CMD_STOP_TRANSMISSION: events = MMC_EVENT_PROG_DONE; break; /* ac - no data transfer */ default: break; } /* Set response type */ switch (request->rtype) { case RESPONSE_NONE: break; case RESPONSE_R1B: cmdat |= MSC_CMDAT_BUSY; /*FALLTHRU*/ case RESPONSE_R1: cmdat |= MSC_CMDAT_RESPONSE_R1; break; case RESPONSE_R2_CID: case RESPONSE_R2_CSD: cmdat |= MSC_CMDAT_RESPONSE_R2; break; case RESPONSE_R3: cmdat |= MSC_CMDAT_RESPONSE_R3; break; case RESPONSE_R4: cmdat |= MSC_CMDAT_RESPONSE_R4; break; case RESPONSE_R5: cmdat |= MSC_CMDAT_RESPONSE_R5; break; case RESPONSE_R6: cmdat |= MSC_CMDAT_RESPONSE_R6; break; default: break; } /* Set command index */ if (request->cmd == MMC_CIM_RESET) { REG_MSC_CMD = MMC_CMD_GO_IDLE_STATE; } else { REG_MSC_CMD = request->cmd; } /* Set argument */ REG_MSC_ARG = request->arg; /* Set block length and nob */ if (request->cmd == SD_CMD_APP_SEND_SCR) { /* get SCR from DataFIFO */ REG_MSC_BLKLEN = 8; REG_MSC_NOB = 1; } else { REG_MSC_BLKLEN = request->block_len; REG_MSC_NOB = request->nob; } /* Set command */ REG_MSC_CMDAT = cmdat; debug("Send cmd %d cmdat: %x arg: %x resp %d\n", request->cmd, cmdat, request->arg, request->rtype); /* Start MMC/SD clock and send command to card */ jz_mmc_start_clock(); /* Wait for command completion */ while (timeout-- && !(REG_MSC_STAT & MSC_STAT_END_CMD_RES)) ; if (timeout == 0) return MMC_ERROR_TIMEOUT; REG_MSC_IREG = MSC_IREG_END_CMD_RES; /* clear flag */ /* Check for status */ retval = jz_mmc_check_status(request); if (retval) { return retval; } /* Complete command with no response */ if (request->rtype == RESPONSE_NONE) { return MMC_NO_ERROR; } /* Get response */ jz_mmc_get_response(request); /* Start data operation */ if (events & (MMC_EVENT_RX_DATA_DONE | MMC_EVENT_TX_DATA_DONE)) { if (events & MMC_EVENT_RX_DATA_DONE) { if (request->cmd == SD_CMD_APP_SEND_SCR) { /* SD card returns SCR register as data. MMC core expect it in the response buffer, after normal response. */ request->buffer = (u8 *)((u32)request->response + 5); } jz_mmc_receive_data(request); } if (events & MMC_EVENT_TX_DATA_DONE) { jz_mmc_transmit_data(request); } /* Wait for Data Done */ while (!(REG_MSC_IREG & MSC_IREG_DATA_TRAN_DONE)) ; REG_MSC_IREG = MSC_IREG_DATA_TRAN_DONE; /* clear status */ } /* Wait for Prog Done event */ if (events & MMC_EVENT_PROG_DONE) { while (!(REG_MSC_IREG & MSC_IREG_PRG_DONE)) ; REG_MSC_IREG = MSC_IREG_PRG_DONE; /* clear status */ } /* Command completed */ return MMC_NO_ERROR; /* return successfully */ } int mmc_block_read(u8 *dst, ulong src, ulong len) { struct mmc_request request; struct mmc_response_r1 r1; int retval = 0; if (len == 0) goto exit; mmc_simple_cmd(&request, MMC_CMD_SEND_STATUS, mmcinfo.rca, RESPONSE_R1); retval = mmc_unpack_r1(&request, &r1, 0); if (retval && (retval != MMC_ERROR_STATE_MISMATCH)) goto exit; mmc_simple_cmd(&request, MMC_CMD_SET_BLOCKLEN, len, RESPONSE_R1); if (retval = mmc_unpack_r1(&request, &r1, 0)) goto exit; if (!sd2_0) src *= mmcinfo.block_len; mmc_send_cmd(&request, MMC_CMD_READ_SINGLE_BLOCK, src, 1, len, RESPONSE_R1, dst); if (retval = mmc_unpack_r1(&request, &r1, 0)) goto exit; exit: return retval; } ulong mmc_bread(int dev_num, ulong blkstart, ulong blkcnt, ulong *dst) { if (!mmc_ready) { printf("Please initial the MMC first\n"); return -1; } int i = 0; ulong dst_tmp = dst; for (i = 0; i < blkcnt; i++) { if ((mmc_block_read((uchar *)(dst_tmp), blkstart, mmcinfo.block_len)) < 0) return -1; dst_tmp += mmcinfo.block_len; blkstart++; } return i; } int mmc_select_card(void) { struct mmc_request request; struct mmc_response_r1 r1; int retval; mmc_simple_cmd(&request, MMC_CMD_SELECT_CARD, mmcinfo.rca, RESPONSE_R1B); retval = mmc_unpack_r1(&request, &r1, 0); if (retval) { return retval; } if (mmcinfo.sd) { mmc_simple_cmd(&request, MMC_CMD_APP_CMD, mmcinfo.rca, RESPONSE_R1); retval = mmc_unpack_r1(&request,&r1,0); if (retval) { return retval; } #if defined(MMC_BUS_WIDTH_1BIT) mmc_simple_cmd(&request, SET_BUS_WIDTH, 1, RESPONSE_R1); #else mmc_simple_cmd(&request, SET_BUS_WIDTH, 2, RESPONSE_R1); #endif retval = mmc_unpack_r1(&request,&r1,0); if (retval) { return retval; } } return 0; } /* * Configure card */ static void mmc_configure_card(void) { u32 rate; /* Get card info */ if (sd2_0) mmcinfo.block_num = (mmcinfo.csd.c_size + 1) << 10; else mmcinfo.block_num = (mmcinfo.csd.c_size + 1) * (1 << (mmcinfo.csd.c_size_mult + 2)); mmcinfo.block_len = 1 << mmcinfo.csd.read_bl_len; mmc_dev.if_type = IF_TYPE_SD; mmc_dev.part_type = PART_TYPE_DOS; mmc_dev.dev = 0; mmc_dev.lun = 0; mmc_dev.type = 0; mmc_dev.blksz = mmcinfo.block_len; mmc_dev.lba = mmcinfo.block_num; mmc_dev.removable = 0; printf("%s Detected: %lu blocks of %lu bytes\n", sd2_0 == 1 ? "SDHC" : "SD", mmc_dev.lba, mmc_dev.blksz); /* Fix the clock rate */ rate = mmc_tran_speed(mmcinfo.csd.tran_speed); if (rate < MMC_CLOCK_SLOW) rate = MMC_CLOCK_SLOW; if ((mmcinfo.sd == 0) && (rate > MMC_CLOCK_FAST)) rate = MMC_CLOCK_FAST; if ((mmcinfo.sd) && (rate > SD_CLOCK_FAST)) rate = SD_CLOCK_FAST; debug("%s: block_len=%d block_num=%d rate=%d\n", __func__, mmcinfo.block_len, mmcinfo.block_num, rate); jz_mmc_set_clock(mmcinfo.sd, rate); } /* * State machine routines to initialize card(s) */ /* CIM_SINGLE_CARD_ACQ (frequency at 400 kHz) --- Must enter from GO_IDLE_STATE --- 1. SD_SEND_OP_COND (SD Card) [CMD55] + [CMD41] 2. SEND_OP_COND (Full Range) [CMD1] {optional} 3. SEND_OP_COND (Set Range ) [CMD1] If busy, delay and repeat step 2 4. ALL_SEND_CID [CMD2] If timeout, set an error (no cards found) 5. SET_RELATIVE_ADDR [CMD3] 6. SEND_CSD [CMD9] 7. SET_DSR [CMD4] Only call this if (csd.dsr_imp). 8. Set clock frequency (check available in csd.tran_speed) */ #define MMC_INIT_DOING 0 #define MMC_INIT_PASSED 1 #define MMC_INIT_FAILED 2 static int mmc_init_card_state(struct mmc_request *request) { struct mmc_response_r1 r1; struct mmc_response_r3 r3; int retval; int ocr = 0x40300000; int limit_41 = 0; switch (request->cmd) { case MMC_CMD_GO_IDLE_STATE: /* No response to parse */ if (mmcinfo.sd) mmc_simple_cmd(request, 8, 0x1aa, RESPONSE_R1); else mmc_simple_cmd(request, MMC_CMD_SEND_OP_COND, MMC_OCR_ARG, RESPONSE_R3); break; case 8: retval = mmc_unpack_r1(request,&r1,mmcinfo.state); mmc_simple_cmd(request, MMC_CMD_APP_CMD, 0, RESPONSE_R1); break; case MMC_CMD_APP_CMD: retval = mmc_unpack_r1(request,&r1,mmcinfo.state); if (retval & (limit_41 < 100)) { debug("%s: unable to MMC_APP_CMD error=%d (%s)\n", __func__, retval, mmc_result_to_string(retval)); limit_41++; mmc_simple_cmd(request, SD_CMD_APP_SEND_OP_COND, ocr, RESPONSE_R3); } else if (limit_41 < 100) { limit_41++; mmc_simple_cmd(request, SD_CMD_APP_SEND_OP_COND, ocr, RESPONSE_R3); } else{ /* reset the card to idle*/ mmc_simple_cmd(request, MMC_CMD_GO_IDLE_STATE, 0, RESPONSE_NONE); mmcinfo.sd = 0; } break; case SD_CMD_APP_SEND_OP_COND: retval = mmc_unpack_r3(request, &r3); if (retval) { debug("%s: try MMC card\n", __func__); mmc_simple_cmd(request, SD_CMD_APP_SEND_OP_COND, MMC_OCR_ARG, RESPONSE_R3); break; } debug("%s: read ocr value = 0x%08x\n", __func__, r3.ocr); if(!(r3.ocr & MMC_CARD_BUSY || ocr == 0)){ udelay(50000); mmc_simple_cmd(request, MMC_CMD_APP_CMD, 0, RESPONSE_R1); } else { mmcinfo.sd = 1; /* SD Card ready */ mmcinfo.state = CARD_STATE_READY; mmc_simple_cmd(request, MMC_CMD_ALL_SEND_CID, 0, RESPONSE_R2_CID); } break; case MMC_CMD_SEND_OP_COND: retval = mmc_unpack_r3(request, &r3); if (retval) { debug("%s: failed SEND_OP_COND error=%d (%s)\n", __func__, retval, mmc_result_to_string(retval)); return MMC_INIT_FAILED; } debug("%s: read ocr value = 0x%08x\n", __func__, r3.ocr); if (!(r3.ocr & MMC_CARD_BUSY)) { mmc_simple_cmd(request, MMC_CMD_SEND_OP_COND, MMC_OCR_ARG, RESPONSE_R3); } else { mmcinfo.sd = 0; /* MMC Card ready */ mmcinfo.state = CARD_STATE_READY; mmc_simple_cmd(request, MMC_CMD_ALL_SEND_CID, 0, RESPONSE_R2_CID); } break; case MMC_CMD_ALL_SEND_CID: retval = mmc_unpack_cid( request, &mmcinfo.cid ); /*FIXME:ignore CRC error for CMD2/CMD9/CMD10 */ if ( retval && (retval != MMC_ERROR_CRC)) { debug("mmc_init_card_state: unable to ALL_SEND_CID error=%d (%s)\n", retval, mmc_result_to_string(retval)); return MMC_INIT_FAILED; } mmcinfo.state = CARD_STATE_IDENT; if(mmcinfo.sd) mmc_simple_cmd(request, MMC_CMD_SET_RELATIVE_ADDR, 0, RESPONSE_R6); else mmc_simple_cmd(request, MMC_CMD_SET_RELATIVE_ADDR, ID_TO_RCA(mmcinfo.id) << 16, RESPONSE_R1); break; case MMC_CMD_SET_RELATIVE_ADDR: if (mmcinfo.sd) { retval = mmc_unpack_r6(request, &r1, mmcinfo.state, &mmcinfo.rca); mmcinfo.rca = mmcinfo.rca << 16; debug("%s: Get RCA from SD: 0x%04x Status: %x\n", __func__, mmcinfo.rca, r1.status); } else { retval = mmc_unpack_r1(request,&r1,mmcinfo.state); mmcinfo.rca = ID_TO_RCA(mmcinfo.id) << 16; } if (retval) { debug("%s: unable to SET_RELATIVE_ADDR error=%d (%s)\n", __func__, retval, mmc_result_to_string(retval)); return MMC_INIT_FAILED; } mmcinfo.state = CARD_STATE_STBY; mmc_simple_cmd(request, MMC_CMD_SEND_CSD, mmcinfo.rca, RESPONSE_R2_CSD); break; case MMC_CMD_SEND_CSD: retval = mmc_unpack_csd(request, &mmcinfo.csd); mmc_ready = 1; /*FIXME:ignore CRC error for CMD2/CMD9/CMD10 */ if (retval && (retval != MMC_ERROR_CRC)) { debug("%s: unable to SEND_CSD error=%d (%s)\n", __func__, retval, mmc_result_to_string(retval)); return MMC_INIT_FAILED; } if (mmcinfo.csd.dsr_imp) { debug("%s: driver doesn't support setting DSR\n", __func__); } mmc_configure_card(); return MMC_INIT_PASSED; default: debug("%s: error! Illegal last cmd %d\n", __func__, request->cmd); return MMC_INIT_FAILED; } return MMC_INIT_DOING; } int mmc_init_card(void) { struct mmc_request request; int retval; mmc_simple_cmd(&request, MMC_CIM_RESET, 0, RESPONSE_NONE); /* reset card */ mmc_simple_cmd(&request, MMC_CMD_GO_IDLE_STATE, 0, RESPONSE_NONE); mmcinfo.sd = 1; /* assuming a SD card */ while ((retval = mmc_init_card_state(&request)) == MMC_INIT_DOING) ; if (retval == MMC_INIT_PASSED) return MMC_NO_ERROR; else return MMC_NO_RESPONSE; } int mmc_legacy_init(int verbose) { if (!__msc_card_detected()) return 1; /* Step-1: init GPIO */ __gpio_as_msc(); __msc_init_io(); /* Step-2: turn on power of card */ #if !defined(CONFIG_SAKC) __msc_enable_power(); #endif /* Step-3: Reset MSC Controller. */ __msc_reset(); /* Step-3: mask all IRQs. */ MMC_IRQ_MASK(); /* Step-4: stop MMC/SD clock */ jz_mmc_stop_clock(); mmc_init_card(); mmc_select_card(); mmc_dev.block_read = mmc_bread; fat_register_device(&mmc_dev,1); /* partitions start counting with 1 */ return 0; } /* * Debugging functions */ static char * mmc_result_strings[] = { "NO_RESPONSE", "NO_ERROR", "ERROR_OUT_OF_RANGE", "ERROR_ADDRESS", "ERROR_BLOCK_LEN", "ERROR_ERASE_SEQ", "ERROR_ERASE_PARAM", "ERROR_WP_VIOLATION", "ERROR_CARD_IS_LOCKED", "ERROR_LOCK_UNLOCK_FAILED", "ERROR_COM_CRC", "ERROR_ILLEGAL_COMMAND", "ERROR_CARD_ECC_FAILED", "ERROR_CC", "ERROR_GENERAL", "ERROR_UNDERRUN", "ERROR_OVERRUN", "ERROR_CID_CSD_OVERWRITE", "ERROR_STATE_MISMATCH", "ERROR_HEADER_MISMATCH", "ERROR_TIMEOUT", "ERROR_CRC", "ERROR_DRIVER_FAILURE", }; char * mmc_result_to_string(int i) { return mmc_result_strings[i+1]; } static char * card_state_strings[] = { "empty", "idle", "ready", "ident", "stby", "tran", "data", "rcv", "prg", "dis", }; static inline char * card_state_to_string(int i) { return card_state_strings[i+1]; } /* * Utility functions */ #define PARSE_U32(_buf,_index) \ (((u32)_buf[_index]) << 24) | (((u32)_buf[_index+1]) << 16) | \ (((u32)_buf[_index+2]) << 8) | ((u32)_buf[_index+3]); #define PARSE_U16(_buf,_index) \ (((u16)_buf[_index]) << 8) | ((u16)_buf[_index+1]); int mmc_unpack_csd(struct mmc_request *request, struct mmc_csd *csd) { u8 *buf = request->response; int num = 0; if (request->result) return request->result; if (buf[0] != 0x3f) return MMC_ERROR_HEADER_MISMATCH; csd->csd_structure = (buf[1] & 0xc0) >> 6; if (csd->csd_structure) sd2_0 = 1; else sd2_0 = 0; switch (csd->csd_structure) { case 0 :/* Version 1.01-1.10 * Version 2.00/Standard Capacity */ csd->taac = buf[2]; csd->nsac = buf[3]; csd->tran_speed = buf[4]; csd->ccc = (((u16)buf[5]) << 4) | ((buf[6] & 0xf0) >> 4); csd->read_bl_len = buf[6] & 0x0f; /* for support 2GB card*/ if (csd->read_bl_len >= 10) { num = csd->read_bl_len - 9; csd->read_bl_len = 9; } csd->read_bl_partial = (buf[7] & 0x80) ? 1 : 0; csd->write_blk_misalign = (buf[7] & 0x40) ? 1 : 0; csd->read_blk_misalign = (buf[7] & 0x20) ? 1 : 0; csd->dsr_imp = (buf[7] & 0x10) ? 1 : 0; csd->c_size = ((((u16)buf[7]) & 0x03) << 10) | (((u16)buf[8]) << 2) | (((u16)buf[9]) & 0xc0) >> 6; if (num) csd->c_size = csd->c_size << num; csd->vdd_r_curr_min = (buf[9] & 0x38) >> 3; csd->vdd_r_curr_max = buf[9] & 0x07; csd->vdd_w_curr_min = (buf[10] & 0xe0) >> 5; csd->vdd_w_curr_max = (buf[10] & 0x1c) >> 2; csd->c_size_mult = ((buf[10] & 0x03) << 1) | ((buf[11] & 0x80) >> 7); csd->sector_size = (buf[11] & 0x7c) >> 2; csd->erase_grp_size = ((buf[11] & 0x03) << 3) | ((buf[12] & 0xe0) >> 5); csd->wp_grp_size = buf[12] & 0x1f; csd->wp_grp_enable = (buf[13] & 0x80) ? 1 : 0; csd->default_ecc = (buf[13] & 0x60) >> 5; csd->r2w_factor = (buf[13] & 0x1c) >> 2; csd->write_bl_len = ((buf[13] & 0x03) << 2) | ((buf[14] & 0xc0) >> 6); if (csd->write_bl_len >= 10) csd->write_bl_len = 9; csd->write_bl_partial = (buf[14] & 0x20) ? 1 : 0; csd->file_format_grp = (buf[15] & 0x80) ? 1 : 0; csd->copy = (buf[15] & 0x40) ? 1 : 0; csd->perm_write_protect = (buf[15] & 0x20) ? 1 : 0; csd->tmp_write_protect = (buf[15] & 0x10) ? 1 : 0; csd->file_format = (buf[15] & 0x0c) >> 2; csd->ecc = buf[15] & 0x03; break; case 1 : /* Version 2.00/High Capacity */ csd->taac = 0; csd->nsac = 0; csd->tran_speed = buf[4]; csd->ccc = (((u16)buf[5]) << 4) | ((buf[6] & 0xf0) >> 4); csd->read_bl_len = 9; csd->read_bl_partial = 0; csd->write_blk_misalign = 0; csd->read_blk_misalign = 0; csd->dsr_imp = (buf[7] & 0x10) ? 1 : 0; csd->c_size = ((((u16)buf[8]) & 0x3f) << 16) | (((u16)buf[9]) << 8) | ((u16)buf[10]) ; csd->sector_size = 0x7f; csd->erase_grp_size = 0; csd->wp_grp_size = 0; csd->wp_grp_enable = 0; csd->default_ecc = (buf[13] & 0x60) >> 5; csd->r2w_factor = 4;/* Unused */ csd->write_bl_len = 9; csd->write_bl_partial = 0; csd->file_format_grp = 0; csd->copy = (buf[15] & 0x40) ? 1 : 0; csd->perm_write_protect = (buf[15] & 0x20) ? 1 : 0; csd->tmp_write_protect = (buf[15] & 0x10) ? 1 : 0; csd->file_format = 0; csd->ecc = buf[15] & 0x03; } return 0; } int mmc_unpack_r1(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state) { u8 *buf = request->response; if (request->result) return request->result; r1->cmd = buf[0]; r1->status = PARSE_U32(buf,1); debug("mmc_unpack_r1: cmd=%d status=%08x\n", r1->cmd, r1->status); if (R1_STATUS(r1->status)) { if (r1->status & R1_OUT_OF_RANGE) return MMC_ERROR_OUT_OF_RANGE; if (r1->status & R1_ADDRESS_ERROR) return MMC_ERROR_ADDRESS; if (r1->status & R1_BLOCK_LEN_ERROR) return MMC_ERROR_BLOCK_LEN; if (r1->status & R1_ERASE_SEQ_ERROR) return MMC_ERROR_ERASE_SEQ; if (r1->status & R1_ERASE_PARAM) return MMC_ERROR_ERASE_PARAM; if (r1->status & R1_WP_VIOLATION) return MMC_ERROR_WP_VIOLATION; /*if (r1->status & R1_CARD_IS_LOCKED) return MMC_ERROR_CARD_IS_LOCKED; */ if (r1->status & R1_LOCK_UNLOCK_FAILED) return MMC_ERROR_LOCK_UNLOCK_FAILED; if (r1->status & R1_COM_CRC_ERROR) return MMC_ERROR_COM_CRC; if (r1->status & R1_ILLEGAL_COMMAND) return MMC_ERROR_ILLEGAL_COMMAND; if (r1->status & R1_CARD_ECC_FAILED) return MMC_ERROR_CARD_ECC_FAILED; if (r1->status & R1_CC_ERROR) return MMC_ERROR_CC; if (r1->status & R1_ERROR) return MMC_ERROR_GENERAL; if (r1->status & R1_UNDERRUN) return MMC_ERROR_UNDERRUN; if (r1->status & R1_OVERRUN) return MMC_ERROR_OVERRUN; if (r1->status & R1_CID_CSD_OVERWRITE) return MMC_ERROR_CID_CSD_OVERWRITE; } if (buf[0] != request->cmd) return MMC_ERROR_HEADER_MISMATCH; /* This should be last - it's the least dangerous error */ return 0; } int mmc_unpack_scr(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state, u32 *scr) { u8 *buf = request->response; if (request->result) return request->result; *scr = PARSE_U32(buf, 5); /* Save SCR returned by the SD Card */ return mmc_unpack_r1(request, r1, state); } int mmc_unpack_r6(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state, int *rca) { u8 *buf = request->response; if (request->result) return request->result; *rca = PARSE_U16(buf,1); /* Save RCA returned by the SD Card */ *(buf+1) = 0; *(buf+2) = 0; return mmc_unpack_r1(request, r1, state); } int mmc_unpack_cid(struct mmc_request *request, struct mmc_cid *cid) { int i; u8 *buf = request->response; if (request->result) return request->result; cid->mid = buf[1]; cid->oid = PARSE_U16(buf,2); for (i = 0 ; i < 5 ; i++) cid->pnm[i] = buf[4+i]; cid->pnm[6] = 0; cid->prv = buf[10]; cid->psn = PARSE_U32(buf,10); cid->mdt = buf[15]; printf("Man %02x OEM 0x%04x \"%s\" %d.%d 0x%08x " "Date %02u/%04u\n", cid->mid, cid->oid, cid->pnm, cid->prv >> 4, cid->prv & 0xf, cid->psn, cid->mdt & 0xf, (cid->mdt >> 4) + 2000); if (buf[0] != 0x3f) return MMC_ERROR_HEADER_MISMATCH; return 0; } int mmc_unpack_r3(struct mmc_request *request, struct mmc_response_r3 *r3) { u8 *buf = request->response; if (request->result) return request->result; r3->ocr = PARSE_U32(buf,1); debug("mmc_unpack_r3: ocr=%08x\n", r3->ocr); if (buf[0] != 0x3f) return MMC_ERROR_HEADER_MISMATCH; return 0; } #define KBPS 1 #define MBPS 1000 static u32 ts_exp[] = { 100*KBPS, 1*MBPS, 10*MBPS, 100*MBPS, 0, 0, 0, 0 }; static u32 ts_mul[] = { 0, 1000, 1200, 1300, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000, 7000, 8000 }; u32 mmc_tran_speed(u8 ts) { u32 rate = ts_exp[(ts & 0x7)] * ts_mul[(ts & 0x78) >> 3]; if (rate <= 0) { debug("%s: error - unrecognized speed 0x%02x\n", __func__, ts); return 1; } return rate; } void mmc_send_cmd(struct mmc_request *request, int cmd, u32 arg, u16 nob, u16 block_len, enum mmc_rsp_t rtype, u8 *buffer) { request->cmd = cmd; request->arg = arg; request->rtype = rtype; request->nob = nob; request->block_len = block_len; request->buffer = buffer; request->cnt = nob * block_len; jz_mmc_exec_cmd(request); }