diff options
Diffstat (limited to 'drivers/mmc/omap_hsmmc.c')
| -rw-r--r-- | drivers/mmc/omap_hsmmc.c | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c new file mode 100644 index 0000000..9271470 --- /dev/null +++ b/drivers/mmc/omap_hsmmc.c @@ -0,0 +1,415 @@ +/* + * (C) Copyright 2008 + * Texas Instruments, <www.ti.com> + * Sukumar Ghorai <s-ghorai@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 <mmc.h> +#include <part.h> +#include <i2c.h> +#include <twl4030.h> +#include <asm/io.h> +#include <asm/arch/mmc_host_def.h> + +static int mmc_read_data(hsmmc_t *mmc_base, char *buf, unsigned int size); +static int mmc_write_data(hsmmc_t *mmc_base, const char *buf, unsigned int siz); +static struct mmc hsmmc_dev[2]; +unsigned char mmc_board_init(hsmmc_t *mmc_base) +{ +#if defined(CONFIG_TWL4030_POWER) + twl4030_power_mmc_init(); +#endif + +#if defined(CONFIG_OMAP34XX) + t2_t *t2_base = (t2_t *)T2_BASE; + struct prcm *prcm_base = (struct prcm *)PRCM_BASE; + + writel(readl(&t2_base->pbias_lite) | PBIASLITEPWRDNZ1 | + PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0, + &t2_base->pbias_lite); + + writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL, + &t2_base->devconf0); + + writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL, + &t2_base->devconf1); + + writel(readl(&prcm_base->fclken1_core) | + EN_MMC1 | EN_MMC2 | EN_MMC3, + &prcm_base->fclken1_core); + + writel(readl(&prcm_base->iclken1_core) | + EN_MMC1 | EN_MMC2 | EN_MMC3, + &prcm_base->iclken1_core); +#endif + +/* TODO add appropriate OMAP4 init - none currently necessary */ + + return 0; +} + +void mmc_init_stream(hsmmc_t *mmc_base) +{ + + 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); +} + + +static int mmc_init_setup(struct mmc *mmc) +{ + hsmmc_t *mmc_base = (hsmmc_t *)mmc->priv; + unsigned int reg_val; + unsigned int dsor; + + mmc_board_init(mmc_base); + + 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); + + dsor = 240; + mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK), + (ICE_STOP | DTO_15THDTO | CEN_DISABLE)); + mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK, + (dsor << CLKD_OFFSET) | ICE_OSCILLATE); + while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) + ; + writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl); + + 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(mmc_base); + + return 0; +} + + +static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + hsmmc_t *mmc_base = (hsmmc_t *)mmc->priv; + unsigned int flags, mmc_stat; + unsigned int retry = 0x100000; + + + while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS) + ; + writel(0xFFFFFFFF, &mmc_base->stat); + while (readl(&mmc_base->stat)) + ; + /* + * CMDREG + * CMDIDX[13:8] : Command index + * DATAPRNT[5] : Data Present Select + * ENCMDIDX[4] : Command Index Check Enable + * ENCMDCRC[3] : Command CRC Check Enable + * RSPTYP[1:0] + * 00 = No Response + * 01 = Length 136 + * 10 = Length 48 + * 11 = Length 48 Check busy after response + */ + /* Delay added before checking the status of frq change + * retry not supported by mmc.c(core file) + */ + if (cmd->cmdidx == SD_CMD_APP_SEND_SCR) + udelay(50000); /* wait 50 ms */ + + if (!(cmd->resp_type & MMC_RSP_PRESENT)) + flags = 0; + else if (cmd->resp_type & MMC_RSP_136) + flags = RSP_TYPE_LGHT136 | CICE_NOCHECK; + else if (cmd->resp_type & MMC_RSP_BUSY) + flags = RSP_TYPE_LGHT48B; + else + flags = RSP_TYPE_LGHT48; + + /* enable default flags */ + flags = flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK | + MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE); + + if (cmd->resp_type & MMC_RSP_CRC) + flags |= CCCE_CHECK; + if (cmd->resp_type & MMC_RSP_OPCODE) + flags |= CICE_CHECK; + + if (data) { + if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) || + (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) { + flags |= (MSBS_MULTIBLK | BCE_ENABLE); + data->blocksize = 512; + writel(data->blocksize | (data->blocks << 16), + &mmc_base->blk); + } else + writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk); + + if (data->flags & MMC_DATA_READ) + flags |= (DP_DATA | DDIR_READ); + else + flags |= (DP_DATA | DDIR_WRITE); + } + + writel(cmd->cmdarg, &mmc_base->arg); + writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd); + + do { + mmc_stat = readl(&mmc_base->stat); + retry--; + } while ((mmc_stat == 0) && (retry > 0)); + + if (retry == 0) { + printf("%s : timeout: No status update\n", __func__); + return TIMEOUT; + } + + if ((mmc_stat & IE_CTO) != 0) + return TIMEOUT; + else if ((mmc_stat & ERRI_MASK) != 0) + return -1; + + if (mmc_stat & CC_MASK) { + writel(CC_MASK, &mmc_base->stat); + if (cmd->resp_type & MMC_RSP_PRESENT) { + if (cmd->resp_type & MMC_RSP_136) { + /* response type 2 */ + cmd->response[3] = readl(&mmc_base->rsp10); + cmd->response[2] = readl(&mmc_base->rsp32); + cmd->response[1] = readl(&mmc_base->rsp54); + cmd->response[0] = readl(&mmc_base->rsp76); + } else + /* response types 1, 1b, 3, 4, 5, 6 */ + cmd->response[0] = readl(&mmc_base->rsp10); + } + } + + if (data && (data->flags & MMC_DATA_READ)) { + mmc_read_data(mmc_base, data->dest, + data->blocksize * data->blocks); + } else if (data && (data->flags & MMC_DATA_WRITE)) { + mmc_write_data(mmc_base, data->src, + data->blocksize * data->blocks); + } + return 0; +} + +static int mmc_read_data(hsmmc_t *mmc_base, char *buf, unsigned int size) +{ + unsigned int *output_buf = (unsigned int *)buf; + unsigned int mmc_stat; + unsigned int count; + + /* + * Start Polled Read + */ + count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size; + count /= 4; + + while (size) { + do { + mmc_stat = readl(&mmc_base->stat); + } while (mmc_stat == 0); + + if ((mmc_stat & ERRI_MASK) != 0) + return 1; + + if (mmc_stat & BRR_MASK) { + unsigned int k; + + writel(readl(&mmc_base->stat) | BRR_MASK, + &mmc_base->stat); + for (k = 0; k < count; k++) { + *output_buf = readl(&mmc_base->data); + output_buf++; + } + size -= (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 0; +} + +static int mmc_write_data(hsmmc_t *mmc_base, const char *buf, unsigned int size) +{ + unsigned int *input_buf = (unsigned int *)buf; + unsigned int mmc_stat; + unsigned int count; + + /* + * Start Polled Read + */ + count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size; + count /= 4; + + while (size) { + do { + mmc_stat = readl(&mmc_base->stat); + } while (mmc_stat == 0); + + if ((mmc_stat & ERRI_MASK) != 0) + return 1; + + if (mmc_stat & BWR_MASK) { + unsigned int k; + + writel(readl(&mmc_base->stat) | BWR_MASK, + &mmc_base->stat); + for (k = 0; k < count; k++) { + writel(*input_buf, &mmc_base->data); + input_buf++; + } + size -= (count*4); + } + + if (mmc_stat & BRR_MASK) + writel(readl(&mmc_base->stat) | BRR_MASK, + &mmc_base->stat); + + if (mmc_stat & TC_MASK) { + writel(readl(&mmc_base->stat) | TC_MASK, + &mmc_base->stat); + break; + } + } + return 0; +} + +static void mmc_set_ios(struct mmc *mmc) +{ + hsmmc_t *mmc_base = (hsmmc_t *)mmc->priv; + unsigned int dsor = 0; + + /* configue bus width */ + switch (mmc->bus_width) { + case 8: + writel(readl(&mmc_base->con) | DTW_8_BITMODE, + &mmc_base->con); + break; + + case 4: + writel(readl(&mmc_base->con) & ~DTW_8_BITMODE, + &mmc_base->con); + writel(readl(&mmc_base->hctl) | DTW_4_BITMODE, + &mmc_base->hctl); + break; + + case 1: + default: + writel(readl(&mmc_base->con) & ~DTW_8_BITMODE, + &mmc_base->con); + writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE, + &mmc_base->hctl); + break; + } + + /* configure clock with 96Mhz system clock. + */ + if (mmc->clock != 0) { + dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock); + if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock) + dsor++; + } + + mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK), + (ICE_STOP | DTO_15THDTO | CEN_DISABLE)); + + mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK, + (dsor << CLKD_OFFSET) | ICE_OSCILLATE); + + while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) + ; + writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl); +} + +int omap_mmc_init(int dev_index) +{ + struct mmc *mmc; + + mmc = &hsmmc_dev[dev_index]; + + sprintf(mmc->name, "OMAP SD/MMC"); + mmc->send_cmd = mmc_send_cmd; + mmc->set_ios = mmc_set_ios; + mmc->init = mmc_init_setup; + + switch (dev_index) { + case 0: + mmc->priv = (hsmmc_t *)OMAP_HSMMC1_BASE; + break; + case 1: + mmc->priv = (hsmmc_t *)OMAP_HSMMC2_BASE; + break; + case 2: + mmc->priv = (hsmmc_t *)OMAP_HSMMC3_BASE; + break; + default: + mmc->priv = (hsmmc_t *)OMAP_HSMMC1_BASE; + return 1; + } + mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; + mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS; + + mmc->f_min = 400000; + mmc->f_max = 52000000; + + mmc_register(mmc); + + return 0; +} + |