diff options
Diffstat (limited to 'drivers/mmc/omap3_mmc.c')
| -rw-r--r-- | drivers/mmc/omap3_mmc.c | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/drivers/mmc/omap3_mmc.c b/drivers/mmc/omap3_mmc.c new file mode 100644 index 0000000..0148702 --- /dev/null +++ b/drivers/mmc/omap3_mmc.c @@ -0,0 +1,558 @@ +/* + * (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> + +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; + +block_dev_desc_t *mmc_get_dev(int dev) +{ + return (block_dev_desc_t *) &mmc_blk_dev; +} + +void twl4030_mmc_config(void) +{ + unsigned char data; + + data = 0x20; + i2c_write(0x4B, 0x82, 1, &data, 1); + data = 0x2; + i2c_write(0x4B, 0x85, 1, &data, 1); +} + +unsigned char mmc_board_init(void) +{ + unsigned int value = 0; + + twl4030_mmc_config(); + + value = CONTROL_PBIAS_LITE; + CONTROL_PBIAS_LITE = value | (1 << 2) | (1 << 1) | (1 << 9); + + value = CONTROL_DEV_CONF0; + CONTROL_DEV_CONF0 = value | (1 << 24); + + return 1; +} + +void mmc_init_stream(void) +{ + volatile unsigned int mmc_stat; + + OMAP_HSMMC_CON |= INIT_INITSTREAM; + + OMAP_HSMMC_CMD = MMC_CMD0; + do { + mmc_stat = OMAP_HSMMC_STAT; + } while (!(mmc_stat & CC_MASK)); + + OMAP_HSMMC_STAT = CC_MASK; + + OMAP_HSMMC_CMD = MMC_CMD0; + do { + mmc_stat = OMAP_HSMMC_STAT; + } while (!(mmc_stat & CC_MASK)); + + OMAP_HSMMC_STAT = OMAP_HSMMC_STAT; + OMAP_HSMMC_CON &= ~INIT_INITSTREAM; +} + +unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div) +{ + unsigned int val; + + mmc_reg_out(OMAP_HSMMC_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(OMAP_HSMMC_SYSCTL, + ICE_MASK | CLKD_MASK, (val << CLKD_OFFSET) | ICE_OSCILLATE); + + while ((OMAP_HSMMC_SYSCTL & ICS_MASK) == ICS_NOTREADY) ; + + OMAP_HSMMC_SYSCTL |= CEN_ENABLE; + return 1; +} + +unsigned char mmc_init_setup(void) +{ + unsigned int reg_val; + + mmc_board_init(); + + OMAP_HSMMC_SYSCONFIG |= MMC_SOFTRESET; + while ((OMAP_HSMMC_SYSSTATUS & RESETDONE) == 0) ; + + OMAP_HSMMC_SYSCTL |= SOFTRESETALL; + while ((OMAP_HSMMC_SYSCTL & SOFTRESETALL) != 0x0) ; + + OMAP_HSMMC_HCTL = DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0; + OMAP_HSMMC_CAPA |= VS30_3V0SUP | VS18_1V8SUP; + + reg_val = OMAP_HSMMC_CON & RESERVED_MASK; + + OMAP_HSMMC_CON = CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | + CDP_ACTIVEHIGH | MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | + STR_BLOCK | HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN; + + mmc_clock_config(CLK_INITSEQ, 0); + OMAP_HSMMC_HCTL |= SDBP_PWRON; + + OMAP_HSMMC_IE = 0x307f0033; + + mmc_init_stream(); + return 1; +} + +unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg, + unsigned int *response) +{ + volatile unsigned int mmc_stat; + + while ((OMAP_HSMMC_PSTATE & DATI_MASK) == DATI_CMDDIS) ; + + OMAP_HSMMC_BLK = BLEN_512BYTESLEN | NBLK_STPCNT; + OMAP_HSMMC_STAT = 0xFFFFFFFF; + OMAP_HSMMC_ARG = arg; + OMAP_HSMMC_CMD = cmd | CMD_TYPE_NORMAL | CICE_NOCHECK | + CCCE_NOCHECK | MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | + DE_DISABLE; + + while (1) { + do { + mmc_stat = OMAP_HSMMC_STAT; + } while (mmc_stat == 0); + + if ((mmc_stat & ERRI_MASK) != 0) + return (unsigned char) mmc_stat; + + if (mmc_stat & CC_MASK) { + OMAP_HSMMC_STAT = CC_MASK; + response[0] = OMAP_HSMMC_RSP10; + if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) { + response[1] = OMAP_HSMMC_RSP32; + response[2] = OMAP_HSMMC_RSP54; + response[3] = OMAP_HSMMC_RSP76; + } + break; + } + } + return 1; +} + +unsigned char mmc_read_data(unsigned int *output_buf) +{ + volatile unsigned int mmc_stat; + unsigned int read_count = 0; + + /* + * Start Polled Read + */ + while (1) { + do { + mmc_stat = OMAP_HSMMC_STAT; + } while (mmc_stat == 0); + + if ((mmc_stat & ERRI_MASK) != 0) + return (unsigned char) mmc_stat; + + if (mmc_stat & BRR_MASK) { + unsigned int k; + + OMAP_HSMMC_STAT |= BRR_MASK; + for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) { + *output_buf = OMAP_HSMMC_DATA; + output_buf++; + read_count += 4; + } + } + + if (mmc_stat & BWR_MASK) + OMAP_HSMMC_STAT |= BWR_MASK; + + if (mmc_stat & TC_MASK) { + OMAP_HSMMC_STAT |= TC_MASK; + 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 int resp[4]; + unsigned short retry_cnt = 2000; + + /* 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, 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, 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, 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; + OMAP_HSMMC_CON &= ~OD; + OMAP_HSMMC_CON |= OPENDRAIN; + } + + argument = ocr_value; + err = mmc_send_cmd(ret_cmd41, argument, resp); + if (err != 1) + return err; + + ocr_recvd = ((mmc_resp_r3 *) resp)->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, resp); + } + + argument = ocr_value; + err = mmc_send_cmd(ret_cmd41, argument, resp); + if (err != 1) + return err; + ocr_recvd = ((mmc_resp_r3 *) resp)->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, 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, resp); + if (err != 1) + return err; + } else { + argument = 0x00000000; + err = mmc_send_cmd(MMC_SDCMD3, argument, resp); + if (err != 1) + return err; + + mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca; + } + + OMAP_HSMMC_CON &= ~OD; + OMAP_HSMMC_CON |= NOOPENDRAIN; + 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 resp[4]; + unsigned int trans_clk, trans_fact, trans_unit, retries = 2; + mmc_csd_reg_t Card_CSD; + unsigned char trans_speed; + + 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, resp); + if (ret_val != 1) + return ret_val; + + ((unsigned int *) &Card_CSD)[3] = resp[3]; + ((unsigned int *) &Card_CSD)[2] = resp[2]; + ((unsigned int *) &Card_CSD)[1] = resp[1]; + ((unsigned int *) &Card_CSD)[0] = resp[0]; + + if (mmc_card_cur->card_type == MMC_CARD) + mmc_card_cur->version = Card_CSD.spec_vers; + + trans_speed = Card_CSD.tran_speed; + + ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, 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, 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, resp); + if (ret_val != 1) + return ret_val; + + /* get the card size in sectors */ + ret_val = mmc_read_cardsize(mmc_card_cur, &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_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; +} + +int mmc_read(ulong src, uchar *dst, int size) +{ + return 0; +} + +int mmc_write(uchar *src, ulong dst, int size) +{ + return 0; +} + +int mmc2info(ulong addr) +{ + return 0; +} |