/* * (C) Copyright 2008 * Texas Instruments, <www.ti.com> * Syed Mohammed Khasim <khasim@ti.com> * * 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's version 2 of * the License. * * 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 <config.h> #include <common.h> #include <fat.h> #include <mmc.h> #include <part.h> #include <i2c.h> #include <twl4030.h> #include <asm/io.h> #include <asm/arch/mmc.h> const unsigned short mmc_transspeed_val[15][4] = { {CLKD(10, 1), CLKD(10, 10), CLKD(10, 100), CLKD(10, 1000)}, {CLKD(12, 1), CLKD(12, 10), CLKD(12, 100), CLKD(12, 1000)}, {CLKD(13, 1), CLKD(13, 10), CLKD(13, 100), CLKD(13, 1000)}, {CLKD(15, 1), CLKD(15, 10), CLKD(15, 100), CLKD(15, 1000)}, {CLKD(20, 1), CLKD(20, 10), CLKD(20, 100), CLKD(20, 1000)}, {CLKD(26, 1), CLKD(26, 10), CLKD(26, 100), CLKD(26, 1000)}, {CLKD(30, 1), CLKD(30, 10), CLKD(30, 100), CLKD(30, 1000)}, {CLKD(35, 1), CLKD(35, 10), CLKD(35, 100), CLKD(35, 1000)}, {CLKD(40, 1), CLKD(40, 10), CLKD(40, 100), CLKD(40, 1000)}, {CLKD(45, 1), CLKD(45, 10), CLKD(45, 100), CLKD(45, 1000)}, {CLKD(52, 1), CLKD(52, 10), CLKD(52, 100), CLKD(52, 1000)}, {CLKD(55, 1), CLKD(55, 10), CLKD(55, 100), CLKD(55, 1000)}, {CLKD(60, 1), CLKD(60, 10), CLKD(60, 100), CLKD(60, 1000)}, {CLKD(70, 1), CLKD(70, 10), CLKD(70, 100), CLKD(70, 1000)}, {CLKD(80, 1), CLKD(80, 10), CLKD(80, 100), CLKD(80, 1000)} }; mmc_card_data cur_card_data; static block_dev_desc_t mmc_blk_dev; static hsmmc_t *mmc_base = (hsmmc_t *)OMAP_HSMMC_BASE; block_dev_desc_t *mmc_get_dev(int dev) { return (block_dev_desc_t *) &mmc_blk_dev; } unsigned char mmc_board_init(void) { t2_t *t2_base = (t2_t *)T2_BASE; twl4030_power_mmc_init(); writel(readl(&t2_base->pbias_lite) | PBIASLITEPWRDNZ1 | PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0, &t2_base->pbias_lite); writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL, &t2_base->devconf0); return 1; } void mmc_init_stream(void) { writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con); writel(MMC_CMD0, &mmc_base->cmd); while (!(readl(&mmc_base->stat) & CC_MASK)); writel(CC_MASK, &mmc_base->stat); writel(MMC_CMD0, &mmc_base->cmd); while (!(readl(&mmc_base->stat) & CC_MASK)); writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con); } unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div) { unsigned int val; mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK), (ICE_STOP | DTO_15THDTO | CEN_DISABLE)); switch (iclk) { case CLK_INITSEQ: val = MMC_INIT_SEQ_CLK / 2; break; case CLK_400KHZ: val = MMC_400kHz_CLK; break; case CLK_MISC: val = clk_div; break; default: return 0; } mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK, (val << CLKD_OFFSET) | ICE_OSCILLATE); while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY); writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl); return 1; } unsigned char mmc_init_setup(void) { unsigned int reg_val; mmc_board_init(); writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET, &mmc_base->sysconfig); while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0); writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl); while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0); writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl); writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP, &mmc_base->capa); reg_val = readl(&mmc_base->con) & RESERVED_MASK; writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH | MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK | HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con); mmc_clock_config(CLK_INITSEQ, 0); writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl); writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE | IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC, &mmc_base->ie); mmc_init_stream(); return 1; } unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg, unsigned int *response) { unsigned int mmc_stat; while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS); writel(BLEN_512BYTESLEN | NBLK_STPCNT, &mmc_base->blk); writel(0xFFFFFFFF, &mmc_base->stat); writel(arg, &mmc_base->arg); writel(cmd | CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK | MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE, &mmc_base->cmd); while (1) { do { mmc_stat = readl(&mmc_base->stat); } while (mmc_stat == 0); if ((mmc_stat & ERRI_MASK) != 0) return (unsigned char) mmc_stat; if (mmc_stat & CC_MASK) { writel(CC_MASK, &mmc_base->stat); response[0] = readl(&mmc_base->rsp10); if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) { response[1] = readl(&mmc_base->rsp32); response[2] = readl(&mmc_base->rsp54); response[3] = readl(&mmc_base->rsp76); } break; } } return 1; } unsigned char mmc_read_data(unsigned int *output_buf) { unsigned int mmc_stat; unsigned int read_count = 0; /* * Start Polled Read */ while (1) { do { mmc_stat = readl(&mmc_base->stat); } while (mmc_stat == 0); if ((mmc_stat & ERRI_MASK) != 0) return (unsigned char) mmc_stat; if (mmc_stat & BRR_MASK) { unsigned int k; writel(readl(&mmc_base->stat) | BRR_MASK, &mmc_base->stat); for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) { *output_buf = readl(&mmc_base->data); output_buf++; read_count += 4; } } if (mmc_stat & BWR_MASK) writel(readl(&mmc_base->stat) | BWR_MASK, &mmc_base->stat); if (mmc_stat & TC_MASK) { writel(readl(&mmc_base->stat) | TC_MASK, &mmc_base->stat); break; } } return 1; } unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur) { unsigned char err; unsigned int argument = 0; unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val; unsigned short retry_cnt = 2000; mmc_resp_t mmc_resp; /* Set to Initialization Clock */ err = mmc_clock_config(CLK_400KHZ, 0); if (err != 1) return err; mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS; argument = 0x00000000; ocr_value = (0x1FF << 15); err = mmc_send_cmd(MMC_CMD0, argument, mmc_resp.resp); if (err != 1) return err; argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE; err = mmc_send_cmd(MMC_SDCMD8, argument, mmc_resp.resp); hcs_val = (err == 1) ? MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR : MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE; argument = 0x0000 << 16; err = mmc_send_cmd(MMC_CMD55, argument, mmc_resp.resp); if (err == 1) { mmc_card_cur->card_type = SD_CARD; ocr_value |= hcs_val; ret_cmd41 = MMC_ACMD41; } else { mmc_card_cur->card_type = MMC_CARD; ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR; ret_cmd41 = MMC_CMD1; writel(readl(&mmc_base->con) & ~OD, &mmc_base->con); writel(readl(&mmc_base->con) | OPENDRAIN, &mmc_base->con); } argument = ocr_value; err = mmc_send_cmd(ret_cmd41, argument, mmc_resp.resp); if (err != 1) return err; ocr_recvd = mmc_resp.r3.ocr; while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) { retry_cnt--; if (mmc_card_cur->card_type == SD_CARD) { argument = 0x0000 << 16; err = mmc_send_cmd(MMC_CMD55, argument, mmc_resp.resp); } argument = ocr_value; err = mmc_send_cmd(ret_cmd41, argument, mmc_resp.resp); if (err != 1) return err; ocr_recvd = mmc_resp.r3.ocr; } if (!(ocr_recvd & (0x1 << 31))) return 0; if (mmc_card_cur->card_type == MMC_CARD) { if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) == MMC_OCR_REG_ACCESS_MODE_SECTOR) { mmc_card_cur->mode = SECTOR_MODE; } else { mmc_card_cur->mode = BYTE_MODE; } ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK; } else { if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK) == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) { mmc_card_cur->mode = SECTOR_MODE; } else { mmc_card_cur->mode = BYTE_MODE; } ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK; } ocr_recvd &= ~(0x1 << 31); if (!(ocr_recvd & ocr_value)) return 0; err = mmc_send_cmd(MMC_CMD2, argument, mmc_resp.resp); if (err != 1) return err; if (mmc_card_cur->card_type == MMC_CARD) { argument = mmc_card_cur->RCA << 16; err = mmc_send_cmd(MMC_CMD3, argument, mmc_resp.resp); if (err != 1) return err; } else { argument = 0x00000000; err = mmc_send_cmd(MMC_SDCMD3, argument, mmc_resp.resp); if (err != 1) return err; mmc_card_cur->RCA = mmc_resp.r6.newpublishedrca; } writel(readl(&mmc_base->con) & ~OD, &mmc_base->con); writel(readl(&mmc_base->con) | NOOPENDRAIN, &mmc_base->con); return 1; } unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data, mmc_csd_reg_t *cur_csd) { mmc_extended_csd_reg_t ext_csd; unsigned int size, count, blk_len, blk_no, card_size, argument; unsigned char err; unsigned int resp[4]; if (mmc_dev_data->mode == SECTOR_MODE) { if (mmc_dev_data->card_type == SD_CARD) { card_size = (((mmc_sd2_csd_reg_t *) cur_csd)-> c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) | ((((mmc_sd2_csd_reg_t *) cur_csd)-> c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK) << MMC_SD2_CSD_C_SIZE_MSB_OFFSET); mmc_dev_data->size = card_size * 1024; if (mmc_dev_data->size == 0) return 0; } else { argument = 0x00000000; err = mmc_send_cmd(MMC_CMD8, argument, resp); if (err != 1) return err; err = mmc_read_data((unsigned int *) &ext_csd); if (err != 1) return err; mmc_dev_data->size = ext_csd.sectorcount; if (mmc_dev_data->size == 0) mmc_dev_data->size = 8388608; } } else { if (cur_csd->c_size_mult >= 8) return 0; if (cur_csd->read_bl_len >= 12) return 0; /* Compute size */ count = 1 << (cur_csd->c_size_mult + 2); card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) | ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK) << MMC_CSD_C_SIZE_MSB_OFFSET); blk_no = (card_size + 1) * count; blk_len = 1 << cur_csd->read_bl_len; size = blk_no * blk_len; mmc_dev_data->size = size / MMCSD_SECTOR_SIZE; if (mmc_dev_data->size == 0) return 0; } return 1; } unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes, mmc_card_data *mmc_c, unsigned long *output_buf) { unsigned char err; unsigned int argument; unsigned int resp[4]; unsigned int num_sec_val = (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE; unsigned int sec_inc_val; if (num_sec_val == 0) return 1; if (mmc_c->mode == SECTOR_MODE) { argument = start_sec; sec_inc_val = 1; } else { argument = start_sec * MMCSD_SECTOR_SIZE; sec_inc_val = MMCSD_SECTOR_SIZE; } while (num_sec_val) { err = mmc_send_cmd(MMC_CMD17, argument, resp); if (err != 1) return err; err = mmc_read_data((unsigned int *) output_buf); if (err != 1) return err; output_buf += (MMCSD_SECTOR_SIZE / 4); argument += sec_inc_val; num_sec_val--; } return 1; } unsigned char configure_mmc(mmc_card_data *mmc_card_cur) { unsigned char ret_val; unsigned int argument; unsigned int trans_clk, trans_fact, trans_unit, retries = 2; unsigned char trans_speed; mmc_resp_t mmc_resp; ret_val = mmc_init_setup(); if (ret_val != 1) return ret_val; do { ret_val = mmc_detect_card(mmc_card_cur); retries--; } while ((retries > 0) && (ret_val != 1)); argument = mmc_card_cur->RCA << 16; ret_val = mmc_send_cmd(MMC_CMD9, argument, mmc_resp.resp); if (ret_val != 1) return ret_val; if (mmc_card_cur->card_type == MMC_CARD) mmc_card_cur->version = mmc_resp.Card_CSD.spec_vers; trans_speed = mmc_resp.Card_CSD.tran_speed; ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, mmc_resp.resp); if (ret_val != 1) return ret_val; trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK; trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK; if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ) return 0; if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) || (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0)) return 0; trans_unit >>= 0; trans_fact >>= 3; trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2; ret_val = mmc_clock_config(CLK_MISC, trans_clk); if (ret_val != 1) return ret_val; argument = mmc_card_cur->RCA << 16; ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, mmc_resp.resp); if (ret_val != 1) return ret_val; /* Configure the block length to 512 bytes */ argument = MMCSD_SECTOR_SIZE; ret_val = mmc_send_cmd(MMC_CMD16, argument, mmc_resp.resp); if (ret_val != 1) return ret_val; /* get the card size in sectors */ ret_val = mmc_read_cardsize(mmc_card_cur, &mmc_resp.Card_CSD); if (ret_val != 1) return ret_val; return 1; } unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt, void *dst) { omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data, (unsigned long *) dst); return 1; } int mmc_legacy_init(int verbose) { if (configure_mmc(&cur_card_data) != 1) return 1; mmc_blk_dev.if_type = IF_TYPE_MMC; mmc_blk_dev.part_type = PART_TYPE_DOS; mmc_blk_dev.dev = 0; mmc_blk_dev.lun = 0; mmc_blk_dev.type = 0; /* FIXME fill in the correct size (is set to 32MByte) */ mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE; mmc_blk_dev.lba = 0x10000; mmc_blk_dev.removable = 0; mmc_blk_dev.block_read = mmc_bread; fat_register_device(&mmc_blk_dev, 1); return 0; }