diff options
Diffstat (limited to 'drivers/mmc/ftsdc010_esdhc.c')
| -rw-r--r-- | drivers/mmc/ftsdc010_esdhc.c | 687 |
1 files changed, 0 insertions, 687 deletions
diff --git a/drivers/mmc/ftsdc010_esdhc.c b/drivers/mmc/ftsdc010_esdhc.c deleted file mode 100644 index 42f0e0c..0000000 --- a/drivers/mmc/ftsdc010_esdhc.c +++ /dev/null @@ -1,687 +0,0 @@ -/* - * 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); - debug("%s: size: %08x\n", __func__, size); - - if (status & FTSDC010_STATUS_FIFO_ORUN) { - - debug("%s: FIFO OVERRUN: sta: %08x\n", - __func__, status); - - 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_URUN) { - 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_check_rsp(struct mmc *mmc, struct mmc_cmd *cmd, - struct mmc_data *data) -{ - struct mmc_host *host = mmc->priv; - unsigned int sta, clear; - - sta = readl(&host->reg->status); - debug("%s: sta: %08x cmd %d\n", __func__, sta, cmd->cmdidx); - - /* check RSP TIMEOUT or FAIL */ - if (sta & FTSDC010_STATUS_RSP_TIMEOUT) { - /* RSP TIMEOUT */ - debug("%s: RSP timeout: sta: %08x\n", __func__, sta); - - 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\n", __func__, sta); - - clear |= FTSDC010_CLR_RSP_CRC_FAIL; - writel(clear, &host->reg->clr); - - return COMM_ERR; - } else if (sta & FTSDC010_STATUS_RSP_CRC_OK) { - - /* clear response CRC OK bit */ - clear |= FTSDC010_CLR_RSP_CRC_OK; - } - - writel(clear, &host->reg->clr); - return 0; -} - -static int ftsdc010_check_data(struct mmc *mmc, struct mmc_cmd *cmd, - struct mmc_data *data) -{ - struct mmc_host *host = mmc->priv; - unsigned int sta, clear; - - sta = readl(&host->reg->status); - debug("%s: sta: %08x cmd %d\n", __func__, sta, cmd->cmdidx); - - /* check DATA TIMEOUT or FAIL */ - if (data) { - - /* Transfer Complete */ - if (sta & FTSDC010_STATUS_DATA_END) - clear |= FTSDC010_STATUS_DATA_END; - - /* Data CRC_OK */ - if (sta & FTSDC010_STATUS_DATA_CRC_OK) - clear |= FTSDC010_STATUS_DATA_CRC_OK; - - /* DATA TIMEOUT or DATA CRC FAIL */ - if (sta & FTSDC010_STATUS_DATA_TIMEOUT) { - /* DATA TIMEOUT */ - debug("%s: DATA TIMEOUT: sta: %08x\n", __func__, sta); - - clear |= FTSDC010_STATUS_DATA_TIMEOUT; - writel(clear, &host->reg->clr); - - return TIMEOUT; - } else if (sta & FTSDC010_STATUS_DATA_CRC_FAIL) { - /* DATA CRC FAIL */ - debug("%s: DATA CRC FAIL: sta: %08x\n", __func__, sta); - - clear |= FTSDC010_STATUS_DATA_CRC_FAIL; - writel(clear, &host->reg->clr); - - return COMM_ERR; - } - 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; - unsigned int sta, i; - - ret = 0; - - 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: argu: %08x\n", __func__, host->reg->argu); - writel(cmd->cmdarg, &host->reg->argu); - - /* 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); - - /* check CMD_SEND */ - for (i = 0; i < FTSDC010_CMD_RETRY; i++) { - /* - * If we read status register too fast - * will lead hardware error and the RSP_TIMEOUT - * flag will be raised incorrectly. - */ - udelay(16*FTSDC010_DELAY_UNIT); - sta = readl(&host->reg->status); - - /* Command Complete */ - /* - * Note: - * Do not clear FTSDC010_CLR_CMD_SEND flag. - * (by writing FTSDC010_CLR_CMD_SEND bit to clear register) - * It will make the driver becomes very slow. - * If the operation hasn't been finished, hardware will - * clear this bit automatically. - * In origin, the driver will clear this flag if there is - * no data need to be read. - */ - if (sta & FTSDC010_STATUS_CMD_SEND) - break; - } - - if (i > FTSDC010_CMD_RETRY) { - printf("%s: send command timeout\n", __func__); - return TIMEOUT; - } - - /* check rsp status */ - ret = ftsdc010_check_rsp(mmc, cmd, data); - if (ret) - return ret; - - /* read response if we have RSP_OK */ - 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); - } - - /* 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); - } - - /* check data status */ - if (data) { - ret = ftsdc010_check_data(mmc, cmd, data); - if (ret) - return ret; - } - - 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; - - 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 int 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_rate: %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; - unsigned int sta; - - /* 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); - } - - sta = readl(&host->reg->status); - if (sta & FTSDC010_STATUS_CARD_CHANGE) - writel(FTSDC010_CLR_CARD_CHANGE, &host->reg->clr); -} - -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->getcd = NULL; - mmc->getwp = NULL; - - mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; - - mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; - - 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; -} |