From f6c3b34697bf8bf05cb4e81c2fd3cadb9a98daea Mon Sep 17 00:00:00 2001 From: Kuo-Jung Su Date: Mon, 6 May 2013 20:32:51 +0000 Subject: mmc: update Faraday FTSDC010 for rw performance Faraday FTSDC010 is a MMC/SD host controller. Although there is already a driver in current u-boot release, which is modified from eSHDC and contributed by Andes Tech. Its performance is too terrible on Faraday A36x SoC platforms, so I turn to implement this new version of driver which is 10+ times faster than the old one. It's carefully designed to be compatible with Andes chips, so it should be safe to replace it. Signed-off-by: Kuo-Jung Su CC: Andy Fleming Signed-off-by: Andy Fleming --- drivers/mmc/ftsdc010_mci.c | 377 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 377 insertions(+) create mode 100644 drivers/mmc/ftsdc010_mci.c (limited to 'drivers/mmc/ftsdc010_mci.c') diff --git a/drivers/mmc/ftsdc010_mci.c b/drivers/mmc/ftsdc010_mci.c new file mode 100644 index 0000000000..562b14aff8 --- /dev/null +++ b/drivers/mmc/ftsdc010_mci.c @@ -0,0 +1,377 @@ +/* + * Faraday MMC/SD Host Controller + * + * (C) Copyright 2010 Faraday Technology + * Dante Su + * + * This file is released under the terms of GPL v2 and any later version. + * See the file COPYING in the root directory of the source tree for details. + */ + +#include +#include +#include +#include + +#include +#include +#include +#include + +#define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 4) /* 250 ms */ +#define CFG_RST_TIMEOUT CONFIG_SYS_HZ /* 1 sec reset timeout */ + +struct ftsdc010_chip { + void __iomem *regs; + uint32_t wprot; /* write protected (locked) */ + uint32_t rate; /* actual SD clock in Hz */ + uint32_t sclk; /* FTSDC010 source clock in Hz */ + uint32_t fifo; /* fifo depth in bytes */ + uint32_t acmd; +}; + +static inline int ftsdc010_send_cmd(struct mmc *mmc, struct mmc_cmd *mmc_cmd) +{ + struct ftsdc010_chip *chip = mmc->priv; + struct ftsdc010_mmc __iomem *regs = chip->regs; + int ret = TIMEOUT; + uint32_t ts, st; + uint32_t cmd = FTSDC010_CMD_IDX(mmc_cmd->cmdidx); + uint32_t arg = mmc_cmd->cmdarg; + uint32_t flags = mmc_cmd->resp_type; + + cmd |= FTSDC010_CMD_CMD_EN; + + if (chip->acmd) { + cmd |= FTSDC010_CMD_APP_CMD; + chip->acmd = 0; + } + + if (flags & MMC_RSP_PRESENT) + cmd |= FTSDC010_CMD_NEED_RSP; + + if (flags & MMC_RSP_136) + cmd |= FTSDC010_CMD_LONG_RSP; + + writel(FTSDC010_STATUS_RSP_MASK | FTSDC010_STATUS_CMD_SEND, + ®s->clr); + writel(arg, ®s->argu); + writel(cmd, ®s->cmd); + + if (!(flags & (MMC_RSP_PRESENT | MMC_RSP_136))) { + for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) { + if (readl(®s->status) & FTSDC010_STATUS_CMD_SEND) { + writel(FTSDC010_STATUS_CMD_SEND, ®s->clr); + ret = 0; + break; + } + } + } else { + st = 0; + for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) { + st = readl(®s->status); + writel(st & FTSDC010_STATUS_RSP_MASK, ®s->clr); + if (st & FTSDC010_STATUS_RSP_MASK) + break; + } + if (st & FTSDC010_STATUS_RSP_CRC_OK) { + if (flags & MMC_RSP_136) { + mmc_cmd->response[0] = readl(®s->rsp3); + mmc_cmd->response[1] = readl(®s->rsp2); + mmc_cmd->response[2] = readl(®s->rsp1); + mmc_cmd->response[3] = readl(®s->rsp0); + } else { + mmc_cmd->response[0] = readl(®s->rsp0); + } + ret = 0; + } else { + debug("ftsdc010: rsp err (cmd=%d, st=0x%x)\n", + mmc_cmd->cmdidx, st); + } + } + + if (ret) { + debug("ftsdc010: cmd timeout (op code=%d)\n", + mmc_cmd->cmdidx); + } else if (mmc_cmd->cmdidx == MMC_CMD_APP_CMD) { + chip->acmd = 1; + } + + return ret; +} + +static void ftsdc010_clkset(struct mmc *mmc, uint32_t rate) +{ + struct ftsdc010_chip *chip = mmc->priv; + struct ftsdc010_mmc __iomem *regs = chip->regs; + uint32_t div; + + for (div = 0; div < 0x7f; ++div) { + if (rate >= chip->sclk / (2 * (div + 1))) + break; + } + chip->rate = chip->sclk / (2 * (div + 1)); + + writel(FTSDC010_CCR_CLK_DIV(div), ®s->ccr); + + if (IS_SD(mmc)) { + setbits_le32(®s->ccr, FTSDC010_CCR_CLK_SD); + + if (chip->rate > 25000000) + setbits_le32(®s->ccr, FTSDC010_CCR_CLK_HISPD); + else + clrbits_le32(®s->ccr, FTSDC010_CCR_CLK_HISPD); + } +} + +static inline int ftsdc010_is_ro(struct mmc *mmc) +{ + struct ftsdc010_chip *chip = mmc->priv; + const uint8_t *csd = (const uint8_t *)mmc->csd; + + return chip->wprot || (csd[1] & 0x30); +} + +static int ftsdc010_wait(struct ftsdc010_mmc __iomem *regs, uint32_t mask) +{ + int ret = TIMEOUT; + uint32_t st, ts; + + for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) { + st = readl(®s->status); + if (!(st & mask)) + continue; + writel(st & mask, ®s->clr); + ret = 0; + break; + } + + if (ret) + debug("ftsdc010: wait st(0x%x) timeout\n", mask); + + return ret; +} + +/* + * u-boot mmc api + */ + +static int ftsdc010_request(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + int ret = UNUSABLE_ERR; + uint32_t len = 0; + struct ftsdc010_chip *chip = mmc->priv; + struct ftsdc010_mmc __iomem *regs = chip->regs; + + if (data && (data->flags & MMC_DATA_WRITE) && chip->wprot) { + printf("ftsdc010: the card is write protected!\n"); + return ret; + } + + if (data) { + uint32_t dcr; + + len = data->blocksize * data->blocks; + + /* 1. data disable + fifo reset */ + writel(FTSDC010_DCR_FIFO_RST, ®s->dcr); + + /* 2. clear status register */ + writel(FTSDC010_STATUS_DATA_MASK | FTSDC010_STATUS_FIFO_URUN + | FTSDC010_STATUS_FIFO_ORUN, ®s->clr); + + /* 3. data timeout (1 sec) */ + writel(chip->rate, ®s->dtr); + + /* 4. data length (bytes) */ + writel(len, ®s->dlr); + + /* 5. data enable */ + dcr = (ffs(data->blocksize) - 1) | FTSDC010_DCR_DATA_EN; + if (data->flags & MMC_DATA_WRITE) + dcr |= FTSDC010_DCR_DATA_WRITE; + writel(dcr, ®s->dcr); + } + + ret = ftsdc010_send_cmd(mmc, cmd); + if (ret) { + printf("ftsdc010: CMD%d failed\n", cmd->cmdidx); + return ret; + } + + if (!data) + return ret; + + if (data->flags & MMC_DATA_WRITE) { + const uint8_t *buf = (const uint8_t *)data->src; + + while (len > 0) { + int wlen; + + /* wait for tx ready */ + ret = ftsdc010_wait(regs, FTSDC010_STATUS_FIFO_URUN); + if (ret) + break; + + /* write bytes to ftsdc010 */ + for (wlen = 0; wlen < len && wlen < chip->fifo; ) { + writel(*(uint32_t *)buf, ®s->dwr); + buf += 4; + wlen += 4; + } + + len -= wlen; + } + + } else { + uint8_t *buf = (uint8_t *)data->dest; + + while (len > 0) { + int rlen; + + /* wait for rx ready */ + ret = ftsdc010_wait(regs, FTSDC010_STATUS_FIFO_ORUN); + if (ret) + break; + + /* fetch bytes from ftsdc010 */ + for (rlen = 0; rlen < len && rlen < chip->fifo; ) { + *(uint32_t *)buf = readl(®s->dwr); + buf += 4; + rlen += 4; + } + + len -= rlen; + } + + } + + if (!ret) { + ret = ftsdc010_wait(regs, + FTSDC010_STATUS_DATA_END | FTSDC010_STATUS_DATA_ERROR); + } + + return ret; +} + +static void ftsdc010_set_ios(struct mmc *mmc) +{ + struct ftsdc010_chip *chip = mmc->priv; + struct ftsdc010_mmc __iomem *regs = chip->regs; + + ftsdc010_clkset(mmc, mmc->clock); + + clrbits_le32(®s->bwr, FTSDC010_BWR_MODE_MASK); + switch (mmc->bus_width) { + case 4: + setbits_le32(®s->bwr, FTSDC010_BWR_MODE_4BIT); + break; + case 8: + setbits_le32(®s->bwr, FTSDC010_BWR_MODE_8BIT); + break; + default: + setbits_le32(®s->bwr, FTSDC010_BWR_MODE_1BIT); + break; + } +} + +static int ftsdc010_init(struct mmc *mmc) +{ + struct ftsdc010_chip *chip = mmc->priv; + struct ftsdc010_mmc __iomem *regs = chip->regs; + uint32_t ts; + + if (readl(®s->status) & FTSDC010_STATUS_CARD_DETECT) + return NO_CARD_ERR; + + if (readl(®s->status) & FTSDC010_STATUS_WRITE_PROT) { + printf("ftsdc010: write protected\n"); + chip->wprot = 1; + } + + chip->fifo = (readl(®s->feature) & 0xff) << 2; + + /* 1. chip reset */ + writel(FTSDC010_CMD_SDC_RST, ®s->cmd); + for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) { + if (readl(®s->cmd) & FTSDC010_CMD_SDC_RST) + continue; + break; + } + if (readl(®s->cmd) & FTSDC010_CMD_SDC_RST) { + printf("ftsdc010: reset failed\n"); + return UNUSABLE_ERR; + } + + /* 2. enter low speed mode (400k card detection) */ + ftsdc010_clkset(mmc, 400000); + + /* 3. interrupt disabled */ + writel(0, ®s->int_mask); + + return 0; +} + +int ftsdc010_mmc_init(int devid) +{ + struct mmc *mmc; + struct ftsdc010_chip *chip; + struct ftsdc010_mmc __iomem *regs; +#ifdef CONFIG_FTSDC010_BASE_LIST + uint32_t base_list[] = CONFIG_FTSDC010_BASE_LIST; + + if (devid < 0 || devid >= ARRAY_SIZE(base_list)) + return -1; + regs = (void __iomem *)base_list[devid]; +#else + regs = (void __iomem *)(CONFIG_FTSDC010_BASE + (devid << 20)); +#endif + + mmc = malloc(sizeof(struct mmc)); + if (!mmc) + return -ENOMEM; + memset(mmc, 0, sizeof(struct mmc)); + + chip = malloc(sizeof(struct ftsdc010_chip)); + if (!chip) { + free(mmc); + return -ENOMEM; + } + memset(chip, 0, sizeof(struct ftsdc010_chip)); + + chip->regs = regs; + mmc->priv = chip; + + sprintf(mmc->name, "ftsdc010"); + mmc->send_cmd = ftsdc010_request; + mmc->set_ios = ftsdc010_set_ios; + mmc->init = ftsdc010_init; + + mmc->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz; + switch (readl(®s->bwr) & FTSDC010_BWR_CAPS_MASK) { + case FTSDC010_BWR_CAPS_4BIT: + mmc->host_caps |= MMC_MODE_4BIT; + break; + case FTSDC010_BWR_CAPS_8BIT: + mmc->host_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT; + break; + default: + break; + } + +#ifdef CONFIG_SYS_CLK_FREQ + chip->sclk = CONFIG_SYS_CLK_FREQ; +#else + chip->sclk = clk_get_rate("SDC"); +#endif + + mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; + mmc->f_max = chip->sclk / 2; + mmc->f_min = chip->sclk / 0x100; + mmc->block_dev.part_type = PART_TYPE_DOS; + + mmc_register(mmc); + + return 0; +} -- cgit v1.2.1