diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mmc/ftsdc010_esdhc.c | 667 |
2 files changed, 668 insertions, 0 deletions
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index e5ca121ed..6e948605d 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -29,6 +29,7 @@ COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o COBJS-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o COBJS-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o +COBJS-$(CONFIG_FTSDC010) += ftsdc010_esdhc.o COBJS-$(CONFIG_GENERIC_MMC) += mmc.o COBJS-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o COBJS-$(CONFIG_MMC_SPI) += mmc_spi.o diff --git a/drivers/mmc/ftsdc010_esdhc.c b/drivers/mmc/ftsdc010_esdhc.c new file mode 100644 index 000000000..e38dd87f1 --- /dev/null +++ b/drivers/mmc/ftsdc010_esdhc.c @@ -0,0 +1,667 @@ +/* + * Copyright (C) 2011 Andes Technology Corporation + * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.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; 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 <config.h> +#include <common.h> +#include <mmc.h> + +#include <asm/io.h> +#include <faraday/ftsdc010.h> + +/* + * supported mmc hosts + * setting the number CONFIG_FTSDC010_NUMBER in your configuration file. + */ +static struct mmc ftsdc010_dev[CONFIG_FTSDC010_NUMBER]; +static struct mmc_host ftsdc010_host[CONFIG_FTSDC010_NUMBER]; + +static struct ftsdc010_mmc *ftsdc010_get_base_mmc(int dev_index) +{ + return (struct ftsdc010_mmc *)CONFIG_FTSDC010_BASE + dev_index; +} + +#ifdef DEBUG +static void ftsdc010_dump_reg(struct mmc_host *host) +{ + debug("cmd: %08x\n", readl(&host->reg->cmd)); + debug("argu: %08x\n", readl(&host->reg->argu)); + debug("rsp0: %08x\n", readl(&host->reg->rsp0)); + debug("rsp1: %08x\n", readl(&host->reg->rsp1)); + debug("rsp2: %08x\n", readl(&host->reg->rsp2)); + debug("rsp3: %08x\n", readl(&host->reg->rsp3)); + debug("rsp_cmd: %08x\n", readl(&host->reg->rsp_cmd)); + debug("dcr: %08x\n", readl(&host->reg->dcr)); + debug("dtr: %08x\n", readl(&host->reg->dtr)); + debug("dlr: %08x\n", readl(&host->reg->dlr)); + debug("status: %08x\n", readl(&host->reg->status)); + debug("clr: %08x\n", readl(&host->reg->clr)); + debug("int_mask: %08x\n", readl(&host->reg->int_mask)); + debug("pcr: %08x\n", readl(&host->reg->pcr)); + debug("ccr: %08x\n", readl(&host->reg->ccr)); + debug("bwr: %08x\n", readl(&host->reg->bwr)); + debug("dwr: %08x\n", readl(&host->reg->dwr)); + debug("feature: %08x\n", readl(&host->reg->feature)); + debug("rev: %08x\n", readl(&host->reg->rev)); +} +#endif + +static unsigned int enable_imask(struct ftsdc010_mmc *reg, unsigned int imask) +{ + unsigned int newmask; + + newmask = readl(®->int_mask); + newmask |= imask; + + writel(newmask, ®->int_mask); + + return newmask; +} + +static void ftsdc010_pio_read(struct mmc_host *host, char *buf, unsigned int size) +{ + unsigned int fifo; + unsigned int fifo_words; + unsigned int *ptr; + unsigned int status; + unsigned int retry = 0; + + /* get_data_buffer */ + ptr = (unsigned int *)buf; + + while (size) { + status = readl(&host->reg->status); + + if (status & FTSDC010_STATUS_FIFO_ORUN) { + fifo = host->fifo_len > size ? + size : host->fifo_len; + + size -= fifo; + + fifo_words = fifo >> 2; + + while (fifo_words--) + *ptr++ = readl(&host->reg->dwr); + + /* + * for adding some delays for SD card to put + * data into FIFO again + */ + udelay(4*FTSDC010_DELAY_UNIT); + +#ifdef CONFIG_FTSDC010_SDIO + /* sdio allow non-power-of-2 blksz */ + if (fifo & 3) { + unsigned int n = fifo & 3; + unsigned int data = readl(&host->reg->dwr); + + unsigned char *p = (unsigned char *)ptr; + + while (n--) { + *p++ = data; + data >>= 8; + } + } +#endif + } else { + udelay(1); + if (++retry >= FTSDC010_PIO_RETRY) { + debug("%s: PIO_RETRY timeout\n", __func__); + return; + } + } + } +} + +static void ftsdc010_pio_write(struct mmc_host *host, const char *buf, + unsigned int size) +{ + unsigned int fifo; + unsigned int *ptr; + unsigned int status; + unsigned int retry = 0; + + /* get data buffer */ + ptr = (unsigned int *)buf; + + while (size) { + status = readl(&host->reg->status); + + if (status & FTSDC010_STATUS_FIFO_ORUN) { + fifo = host->fifo_len > size ? + size : host->fifo_len; + + size -= fifo; + + fifo = (fifo + 3) >> 2; + + while (fifo--) { + writel(*ptr, &host->reg->dwr); + ptr++; + } + + } else { + udelay(1); + if (++retry >= FTSDC010_PIO_RETRY) { + debug("%s: PIO_RETRY timeout\n", __func__); + return; + } + } + } +} + +static int ftsdc010_pio_check_status(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + struct mmc_host *host = mmc->priv; + + unsigned int sta, clear; + unsigned int i; + + /* check response and hardware status */ + clear = 0; + + /* chech CMD_SEND */ + for (i = 0; i < FTSDC010_CMD_RETRY; i++) { + sta = readl(&host->reg->status); + /* Command Complete */ + if (sta & FTSDC010_STATUS_CMD_SEND) { + if (!data) + clear |= FTSDC010_CLR_CMD_SEND; + break; + } + } + + if (i > FTSDC010_CMD_RETRY) { + printf("%s: send command timeout\n", __func__); + return TIMEOUT; + } + + /* debug: print status register and command index*/ + debug("sta: %08x cmd %d\n", sta, cmd->cmdidx); + + /* handle data FIFO */ + if ((sta & FTSDC010_STATUS_FIFO_ORUN) || + (sta & FTSDC010_STATUS_FIFO_URUN)) { + + /* Wrong DATA FIFO Flag */ + if (data == NULL) + printf("%s, data fifo wrong: sta: %08x cmd %d\n", + __func__, sta, cmd->cmdidx); + + if (sta & FTSDC010_STATUS_FIFO_ORUN) + clear |= FTSDC010_STATUS_FIFO_ORUN; + if (sta & FTSDC010_STATUS_FIFO_URUN) + clear |= FTSDC010_STATUS_FIFO_URUN; + } + + /* check RSP TIMEOUT or FAIL */ + if (sta & FTSDC010_STATUS_RSP_TIMEOUT) { + /* RSP TIMEOUT */ + debug("%s: RSP timeout: sta: %08x cmd %d\n", + __func__, sta, cmd->cmdidx); + + clear |= FTSDC010_CLR_RSP_TIMEOUT; + writel(clear, &host->reg->clr); + + return TIMEOUT; + } else if (sta & FTSDC010_STATUS_RSP_CRC_FAIL) { + /* clear response fail bit */ + debug("%s: RSP CRC FAIL: sta: %08x cmd %d\n", + __func__, sta, cmd->cmdidx); + + clear |= FTSDC010_CLR_RSP_CRC_FAIL; + writel(clear, &host->reg->clr); + + return 0; + } else if (sta & FTSDC010_STATUS_RSP_CRC_OK) { + + /* clear response CRC OK bit */ + clear |= FTSDC010_CLR_RSP_CRC_OK; + } + + /* check DATA TIMEOUT or FAIL */ + if (data) { + if (sta & FTSDC010_STATUS_DATA_TIMEOUT) { + /* DATA TIMEOUT */ + debug("%s: DATA TIMEOUT: sta: %08x\n", + __func__, sta); + + clear |= FTSDC010_STATUS_DATA_TIMEOUT; + writel(sta, &host->reg->clr); + return TIMEOUT; + } else if (sta & FTSDC010_STATUS_DATA_CRC_FAIL) { + /* Error Interrupt */ + debug("%s: DATA CRC FAIL: sta: %08x\n", + __func__, sta); + + clear |= FTSDC010_STATUS_DATA_CRC_FAIL; + writel(clear, &host->reg->clr); + + return 0; + } else if (sta & FTSDC010_STATUS_DATA_END) { + /* Transfer Complete */ + clear |= FTSDC010_STATUS_DATA_END; + } + } + + /* transaction is success and clear status register */ + writel(clear, &host->reg->clr); + + return 0; +} + +static int ftsdc010_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + struct mmc_host *host = mmc->priv; + +#ifdef CONFIG_FTSDC010_SDIO + unsigned int scon; +#endif + unsigned int ccon; + unsigned int mask, tmpmask; + unsigned int ret; + + if (data) + mask = FTSDC010_INT_MASK_RSP_TIMEOUT; + else if (cmd->resp_type & MMC_RSP_PRESENT) + mask = FTSDC010_INT_MASK_RSP_TIMEOUT; + else + mask = FTSDC010_INT_MASK_CMD_SEND; + + /* write argu reg */ + debug("%s: cmd->arg: %08x\n", __func__, cmd->cmdarg); + writel(cmd->cmdarg, &host->reg->argu); + + /* setup cmd reg */ + debug("cmd: %d\n", cmd->cmdidx); + debug("resp: %08x\n", cmd->resp_type); + + /* setup commnad */ + ccon = FTSDC010_CMD_IDX(cmd->cmdidx); + + /* setup command flags */ + ccon |= FTSDC010_CMD_CMD_EN; + + /* + * This hardware didn't support specific commands for mapping + * MMC_RSP_BUSY and MMC_RSP_OPCODE. Hence we don't deal with it. + */ + if (cmd->resp_type & MMC_RSP_PRESENT) { + ccon |= FTSDC010_CMD_NEED_RSP; + mask |= FTSDC010_INT_MASK_RSP_CRC_OK | + FTSDC010_INT_MASK_RSP_CRC_FAIL; + } + + if (cmd->resp_type & MMC_RSP_136) + ccon |= FTSDC010_CMD_LONG_RSP; + + /* In Linux driver, MMC_CMD_APP_CMD is checked in last_opcode */ + if (host->last_opcode == MMC_CMD_APP_CMD) + ccon |= FTSDC010_CMD_APP_CMD; + +#ifdef CONFIG_FTSDC010_SDIO + scon = readl(&host->reg->sdio_ctrl1); + if (host->card_type == MMC_TYPE_SDIO) + scon |= FTSDC010_SDIO_CTRL1_SDIO_ENABLE; + else + scon &= ~FTSDC010_SDIO_CTRL1_SDIO_ENABLE; + writel(scon, &host->reg->sdio_ctrl1); +#endif + + /* record last opcode for specifing the command type to hardware */ + host->last_opcode = cmd->cmdidx; + + /* write int_mask reg */ + tmpmask = readl(&host->reg->int_mask); + tmpmask |= mask; + writel(tmpmask, &host->reg->int_mask); + + /* write cmd reg */ + debug("%s: ccon: %08x\n", __func__, ccon); + writel(ccon, &host->reg->cmd); + udelay(4*FTSDC010_DELAY_UNIT); + + /* read/write data */ + if (data && (data->flags & MMC_DATA_READ)) { + ftsdc010_pio_read(host, data->dest, + data->blocksize * data->blocks); + } else if (data && (data->flags & MMC_DATA_WRITE)) { + ftsdc010_pio_write(host, data->src, + data->blocksize * data->blocks); + } + + /* pio check response status */ + ret = ftsdc010_pio_check_status(mmc, cmd, data); + if (!ret) { + /* if it is long response */ + if (ccon & FTSDC010_CMD_LONG_RSP) { + cmd->response[0] = readl(&host->reg->rsp3); + cmd->response[1] = readl(&host->reg->rsp2); + cmd->response[2] = readl(&host->reg->rsp1); + cmd->response[3] = readl(&host->reg->rsp0); + + } else { + cmd->response[0] = readl(&host->reg->rsp0); + } + } + + udelay(FTSDC010_DELAY_UNIT); + return ret; +} + +static unsigned int cal_blksz(unsigned int blksz) +{ + unsigned int blksztwo = 0; + + while (blksz >>= 1) + blksztwo++; + + return blksztwo; +} + +static int ftsdc010_setup_data(struct mmc *mmc, struct mmc_data *data) +{ + struct mmc_host *host = mmc->priv; + unsigned int dcon, newmask; + + /* configure data transfer paramter */ + if (!data) + return 0; + + if (((data->blocksize - 1) & data->blocksize) != 0) { + printf("%s: can't do non-power-of 2 sized block transfers" + " (blksz %d)\n", __func__, data->blocksize); + return -1; + } + + /* + * We cannot deal with unaligned blocks with more than + * one block being transfered. + */ + if ((data->blocksize <= 2) && (data->blocks > 1)) { + printf("%s: can't do non-word sized block transfers" + " (blksz %d)\n", __func__, data->blocksize); + return -1; + } + + /* data length */ + dcon = data->blocksize * data->blocks; + writel(dcon, &host->reg->dlr); + + /* write data control */ + dcon = cal_blksz(data->blocksize); + + /* add to IMASK register */ + newmask = (FTSDC010_STATUS_RSP_CRC_FAIL | FTSDC010_STATUS_DATA_TIMEOUT); + + /* + * enable UNDERRUN will trigger interrupt immediatedly + * So setup it when rsp is received successfully + */ + if (data->flags & MMC_DATA_WRITE) { + dcon |= FTSDC010_DCR_DATA_WRITE; + } else { + dcon &= ~FTSDC010_DCR_DATA_WRITE; + newmask |= FTSDC010_STATUS_FIFO_ORUN; + } + enable_imask(host->reg, newmask); + +#ifdef CONFIG_FTSDC010_SDIO + /* always reset fifo since last transfer may fail */ + dcon |= FTSDC010_DCR_FIFO_RST; + + /* handle sdio */ + dcon = data->blocksize | data->blocks << 15; + if (data->blocks > 1) + dcon |= FTSDC010_SDIO_CTRL1_SDIO_BLK_MODE; +#endif + + /* enable data transfer which will be pended until cmd is send */ + dcon |= FTSDC010_DCR_DATA_EN; + writel(dcon, &host->reg->dcr); + + return 0; +} + +static int ftsdc010_send_request(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + int ret; + + if (data) { + ret = ftsdc010_setup_data(mmc, data); + + if (ret) { + printf("%s: setup data error\n", __func__); + return -1; + } + + if ((data->flags & MMC_DATA_BOTH_DIR) == MMC_DATA_BOTH_DIR) { + printf("%s: data is both direction\n", __func__); + return -1; + } + } + + /* Send command */ + ret = ftsdc010_send_cmd(mmc, cmd, data); + return ret; +} + +static int ftsdc010_card_detect(struct mmc *mmc) +{ + struct mmc_host *host = mmc->priv; + unsigned int sta; + + sta = readl(&host->reg->status); + debug("%s: card status: %08x\n", __func__, sta); + + return (sta & FTSDC010_STATUS_CARD_DETECT) ? 0 : 1; +} + +static int ftsdc010_request(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + int ret; + + if (ftsdc010_card_detect(mmc) == 0) { + printf("%s: no medium present\n", __func__); + return -1; + } else { + ret = ftsdc010_send_request(mmc, cmd, data); + return ret; + } +} + +static void ftsdc010_set_clk(struct mmc *mmc) +{ + struct mmc_host *host = mmc->priv; + unsigned char clk_div; + unsigned char real_rate; + unsigned int clock; + + debug("%s: mmc_set_clock: %x\n", __func__, mmc->clock); + clock = readl(&host->reg->ccr); + + if (mmc->clock == 0) { + real_rate = 0; + clock |= FTSDC010_CCR_CLK_DIS; + } else { + debug("%s, mmc->clock: %08x, origin clock: %08x\n", + __func__, mmc->clock, clock); + + for (clk_div = 0; clk_div <= 127; clk_div++) { + real_rate = (CONFIG_SYS_CLK_FREQ / 2) / + (2 * (clk_div + 1)); + + if (real_rate <= mmc->clock) + break; + } + + debug("%s: computed real_rete: %x, clk_div: %x\n", + __func__, real_rate, clk_div); + + if (clk_div > 127) + debug("%s: no match clock rate, %x\n", + __func__, mmc->clock); + + clock = (clock & ~FTSDC010_CCR_CLK_DIV(0x7f)) | + FTSDC010_CCR_CLK_DIV(clk_div); + + clock &= ~FTSDC010_CCR_CLK_DIS; + } + + debug("%s, set clock: %08x\n", __func__, clock); + writel(clock, &host->reg->ccr); +} + +static void ftsdc010_set_ios(struct mmc *mmc) +{ + struct mmc_host *host = mmc->priv; + unsigned int power; + unsigned long val; + unsigned int bus_width; + + debug("%s: bus_width: %x, clock: %d\n", + __func__, mmc->bus_width, mmc->clock); + + /* set pcr: power on */ + power = readl(&host->reg->pcr); + power |= FTSDC010_PCR_POWER_ON; + writel(power, &host->reg->pcr); + + if (mmc->clock) + ftsdc010_set_clk(mmc); + + /* set bwr: bus width reg */ + bus_width = readl(&host->reg->bwr); + bus_width &= ~(FTSDC010_BWR_WIDE_8_BUS | FTSDC010_BWR_WIDE_4_BUS | + FTSDC010_BWR_SINGLE_BUS); + + if (mmc->bus_width == 8) + bus_width |= FTSDC010_BWR_WIDE_8_BUS; + else if (mmc->bus_width == 4) + bus_width |= FTSDC010_BWR_WIDE_4_BUS; + else + bus_width |= FTSDC010_BWR_SINGLE_BUS; + + writel(bus_width, &host->reg->bwr); + + /* set fifo depth */ + val = readl(&host->reg->feature); + host->fifo_len = FTSDC010_FEATURE_FIFO_DEPTH(val) * 4; /* 4 bytes */ + + /* set data timeout register */ + val = -1; + writel(val, &host->reg->dtr); +} + +static void ftsdc010_reset(struct mmc_host *host) +{ + unsigned int timeout; + + /* Do SDC_RST: Software reset for all register */ + writel(FTSDC010_CMD_SDC_RST, &host->reg->cmd); + + host->clock = 0; + + /* this hardware has no reset finish flag to read */ + /* wait 100ms maximum */ + timeout = 100; + + /* hw clears the bit when it's done */ + while (readl(&host->reg->dtr) != 0) { + if (timeout == 0) { + printf("%s: reset timeout error\n", __func__); + return; + } + timeout--; + udelay(10*FTSDC010_DELAY_UNIT); + } +} + +static int ftsdc010_core_init(struct mmc *mmc) +{ + struct mmc_host *host = mmc->priv; + unsigned int mask; + unsigned int major, minor, revision; + + /* get hardware version */ + host->version = readl(&host->reg->rev); + + major = FTSDC010_REV_MAJOR(host->version); + minor = FTSDC010_REV_MINOR(host->version); + revision = FTSDC010_REV_REVISION(host->version); + + printf("ftsdc010 hardware ver: %d_%d_r%d\n", major, minor, revision); + + /* Interrupt MASK register init - mask all */ + writel(0x0, &host->reg->int_mask); + + mask = FTSDC010_INT_MASK_CMD_SEND | + FTSDC010_INT_MASK_DATA_END | + FTSDC010_INT_MASK_CARD_CHANGE; +#ifdef CONFIG_FTSDC010_SDIO + mask |= FTSDC010_INT_MASK_CP_READY | + FTSDC010_INT_MASK_CP_BUF_READY | + FTSDC010_INT_MASK_PLAIN_TEXT_READY | + FTSDC010_INT_MASK_SDIO_IRPT; +#endif + + writel(mask, &host->reg->int_mask); + + return 0; +} + +int ftsdc010_mmc_init(int dev_index) +{ + struct mmc *mmc; + struct mmc_host *host; + + mmc = &ftsdc010_dev[dev_index]; + + sprintf(mmc->name, "FTSDC010 SD/MMC"); + mmc->priv = &ftsdc010_host[dev_index]; + mmc->send_cmd = ftsdc010_request; + mmc->set_ios = ftsdc010_set_ios; + mmc->init = ftsdc010_core_init; + + mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; + + mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; + + mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; + + mmc->f_min = CONFIG_SYS_CLK_FREQ / 2 / (2*128); + mmc->f_max = CONFIG_SYS_CLK_FREQ / 2 / 2; + + ftsdc010_host[dev_index].clock = 0; + ftsdc010_host[dev_index].reg = ftsdc010_get_base_mmc(dev_index); + mmc_register(mmc); + + /* reset mmc */ + host = (struct mmc_host *)mmc->priv; + ftsdc010_reset(host); + + return 0; +} |