+++ /dev/null
-/*
- * S3C24xx SD/MMC driver
- *
- * Based on OpenMoko S3C24xx driver by Harald Welte <laforge@openmoko.org>
- *
- * Copyright (C) 2014 Marek Vasut <marex@denx.de>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <malloc.h>
-#include <mmc.h>
-#include <errno.h>
-#include <asm/arch/s3c24x0_cpu.h>
-#include <asm/io.h>
-#include <asm/unaligned.h>
-
-#define S3C2440_SDICON_SDRESET (1 << 8)
-#define S3C2410_SDICON_FIFORESET (1 << 1)
-#define S3C2410_SDICON_CLOCKTYPE (1 << 0)
-
-#define S3C2410_SDICMDCON_LONGRSP (1 << 10)
-#define S3C2410_SDICMDCON_WAITRSP (1 << 9)
-#define S3C2410_SDICMDCON_CMDSTART (1 << 8)
-#define S3C2410_SDICMDCON_SENDERHOST (1 << 6)
-#define S3C2410_SDICMDCON_INDEX 0x3f
-
-#define S3C2410_SDICMDSTAT_CRCFAIL (1 << 12)
-#define S3C2410_SDICMDSTAT_CMDSENT (1 << 11)
-#define S3C2410_SDICMDSTAT_CMDTIMEOUT (1 << 10)
-#define S3C2410_SDICMDSTAT_RSPFIN (1 << 9)
-
-#define S3C2440_SDIDCON_DS_WORD (2 << 22)
-#define S3C2410_SDIDCON_TXAFTERRESP (1 << 20)
-#define S3C2410_SDIDCON_RXAFTERCMD (1 << 19)
-#define S3C2410_SDIDCON_BLOCKMODE (1 << 17)
-#define S3C2410_SDIDCON_WIDEBUS (1 << 16)
-#define S3C2440_SDIDCON_DATSTART (1 << 14)
-#define S3C2410_SDIDCON_XFER_RXSTART (2 << 12)
-#define S3C2410_SDIDCON_XFER_TXSTART (3 << 12)
-#define S3C2410_SDIDCON_BLKNUM 0x7ff
-
-#define S3C2410_SDIDSTA_FIFOFAIL (1 << 8)
-#define S3C2410_SDIDSTA_CRCFAIL (1 << 7)
-#define S3C2410_SDIDSTA_RXCRCFAIL (1 << 6)
-#define S3C2410_SDIDSTA_DATATIMEOUT (1 << 5)
-#define S3C2410_SDIDSTA_XFERFINISH (1 << 4)
-
-#define S3C2410_SDIFSTA_TFHALF (1 << 11)
-#define S3C2410_SDIFSTA_COUNTMASK 0x7f
-
-/*
- * WARNING: We only support one SD IP block.
- * NOTE: It's not likely there will ever exist an S3C24xx with two,
- * at least not in this universe all right.
- */
-static int wide_bus;
-
-static int
-s3cmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
-{
- struct s3c24x0_sdi *sdi_regs = s3c24x0_get_base_sdi();
- uint32_t sdiccon, sdicsta, sdidcon, sdidsta, sdidat, sdifsta;
- uint32_t sdicsta_wait_bit = S3C2410_SDICMDSTAT_CMDSENT;
- unsigned int timeout = 100000;
- int ret = 0, xfer_len, data_offset = 0;
- const uint32_t sdidsta_err_mask = S3C2410_SDIDSTA_FIFOFAIL |
- S3C2410_SDIDSTA_CRCFAIL | S3C2410_SDIDSTA_RXCRCFAIL |
- S3C2410_SDIDSTA_DATATIMEOUT;
-
-
- writel(0xffffffff, &sdi_regs->sdicsta);
- writel(0xffffffff, &sdi_regs->sdidsta);
- writel(0xffffffff, &sdi_regs->sdifsta);
-
- /* Set up data transfer (if applicable). */
- if (data) {
- writel(data->blocksize, &sdi_regs->sdibsize);
-
- sdidcon = data->blocks & S3C2410_SDIDCON_BLKNUM;
- sdidcon |= S3C2410_SDIDCON_BLOCKMODE;
-#if defined(CONFIG_S3C2440)
- sdidcon |= S3C2440_SDIDCON_DS_WORD | S3C2440_SDIDCON_DATSTART;
-#endif
- if (wide_bus)
- sdidcon |= S3C2410_SDIDCON_WIDEBUS;
-
- if (data->flags & MMC_DATA_READ) {
- sdidcon |= S3C2410_SDIDCON_RXAFTERCMD;
- sdidcon |= S3C2410_SDIDCON_XFER_RXSTART;
- } else {
- sdidcon |= S3C2410_SDIDCON_TXAFTERRESP;
- sdidcon |= S3C2410_SDIDCON_XFER_TXSTART;
- }
-
- writel(sdidcon, &sdi_regs->sdidcon);
- }
-
- /* Write CMD arg. */
- writel(cmd->cmdarg, &sdi_regs->sdicarg);
-
- /* Write CMD index. */
- sdiccon = cmd->cmdidx & S3C2410_SDICMDCON_INDEX;
- sdiccon |= S3C2410_SDICMDCON_SENDERHOST;
- sdiccon |= S3C2410_SDICMDCON_CMDSTART;
-
- /* Command with short response. */
- if (cmd->resp_type & MMC_RSP_PRESENT) {
- sdiccon |= S3C2410_SDICMDCON_WAITRSP;
- sdicsta_wait_bit = S3C2410_SDICMDSTAT_RSPFIN;
- }
-
- /* Command with long response. */
- if (cmd->resp_type & MMC_RSP_136)
- sdiccon |= S3C2410_SDICMDCON_LONGRSP;
-
- /* Start the command. */
- writel(sdiccon, &sdi_regs->sdiccon);
-
- /* Wait for the command to complete or for response. */
- for (timeout = 100000; timeout; timeout--) {
- sdicsta = readl(&sdi_regs->sdicsta);
- if (sdicsta & sdicsta_wait_bit)
- break;
-
- if (sdicsta & S3C2410_SDICMDSTAT_CMDTIMEOUT)
- timeout = 1;
- }
-
- /* Clean the status bits. */
- setbits_le32(&sdi_regs->sdicsta, 0xf << 9);
-
- if (!timeout) {
- puts("S3C SDI: Command timed out!\n");
- ret = -ETIMEDOUT;
- goto error;
- }
-
- /* Read out the response. */
- if (cmd->resp_type & MMC_RSP_136) {
- cmd->response[0] = readl(&sdi_regs->sdirsp0);
- cmd->response[1] = readl(&sdi_regs->sdirsp1);
- cmd->response[2] = readl(&sdi_regs->sdirsp2);
- cmd->response[3] = readl(&sdi_regs->sdirsp3);
- } else {
- cmd->response[0] = readl(&sdi_regs->sdirsp0);
- }
-
- /* If there are no data, we're done. */
- if (!data)
- return 0;
-
- xfer_len = data->blocksize * data->blocks;
-
- while (xfer_len > 0) {
- sdidsta = readl(&sdi_regs->sdidsta);
- sdifsta = readl(&sdi_regs->sdifsta);
-
- if (sdidsta & sdidsta_err_mask) {
- printf("S3C SDI: Data error (sdta=0x%08x)\n", sdidsta);
- ret = -EIO;
- goto error;
- }
-
- if (data->flags & MMC_DATA_READ) {
- if ((sdifsta & S3C2410_SDIFSTA_COUNTMASK) < 4)
- continue;
- sdidat = readl(&sdi_regs->sdidat);
- put_unaligned_le32(sdidat, data->dest + data_offset);
- } else { /* Write */
- /* TX FIFO half full. */
- if (!(sdifsta & S3C2410_SDIFSTA_TFHALF))
- continue;
-
- /* TX FIFO is below 32b full, write. */
- sdidat = get_unaligned_le32(data->src + data_offset);
- writel(sdidat, &sdi_regs->sdidat);
- }
- data_offset += 4;
- xfer_len -= 4;
- }
-
- /* Wait for the command to complete or for response. */
- for (timeout = 100000; timeout; timeout--) {
- sdidsta = readl(&sdi_regs->sdidsta);
- if (sdidsta & S3C2410_SDIDSTA_XFERFINISH)
- break;
-
- if (sdidsta & S3C2410_SDIDSTA_DATATIMEOUT)
- timeout = 1;
- }
-
- /* Clear status bits. */
- writel(0x6f8, &sdi_regs->sdidsta);
-
- if (!timeout) {
- puts("S3C SDI: Command timed out!\n");
- ret = -ETIMEDOUT;
- goto error;
- }
-
- writel(0, &sdi_regs->sdidcon);
-
- return 0;
-error:
- return ret;
-}
-
-static int s3cmmc_set_ios(struct mmc *mmc)
-{
- struct s3c24x0_sdi *sdi_regs = s3c24x0_get_base_sdi();
- uint32_t divider = 0;
-
- wide_bus = (mmc->bus_width == 4);
-
- if (!mmc->clock)
- return 0;
-
- divider = DIV_ROUND_UP(get_PCLK(), mmc->clock);
- if (divider)
- divider--;
-
- writel(divider, &sdi_regs->sdipre);
- mdelay(125);
-
- return 0;
-}
-
-static int s3cmmc_init(struct mmc *mmc)
-{
- struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
- struct s3c24x0_sdi *sdi_regs = s3c24x0_get_base_sdi();
-
- /* Start the clock. */
- setbits_le32(&clk_power->clkcon, 1 << 9);
-
-#if defined(CONFIG_S3C2440)
- writel(S3C2440_SDICON_SDRESET, &sdi_regs->sdicon);
- mdelay(10);
- writel(0x7fffff, &sdi_regs->sdidtimer);
-#else
- writel(0xffff, &sdi_regs->sdidtimer);
-#endif
- writel(MMC_MAX_BLOCK_LEN, &sdi_regs->sdibsize);
- writel(0x0, &sdi_regs->sdiimsk);
-
- writel(S3C2410_SDICON_FIFORESET | S3C2410_SDICON_CLOCKTYPE,
- &sdi_regs->sdicon);
-
- mdelay(125);
-
- return 0;
-}
-
-struct s3cmmc_priv {
- struct mmc_config cfg;
- int (*getcd)(struct mmc *);
- int (*getwp)(struct mmc *);
-};
-
-static int s3cmmc_getcd(struct mmc *mmc)
-{
- struct s3cmmc_priv *priv = mmc->priv;
- if (priv->getcd)
- return priv->getcd(mmc);
- else
- return 0;
-}
-
-static int s3cmmc_getwp(struct mmc *mmc)
-{
- struct s3cmmc_priv *priv = mmc->priv;
- if (priv->getwp)
- return priv->getwp(mmc);
- else
- return 0;
-}
-
-static const struct mmc_ops s3cmmc_ops = {
- .send_cmd = s3cmmc_send_cmd,
- .set_ios = s3cmmc_set_ios,
- .init = s3cmmc_init,
- .getcd = s3cmmc_getcd,
- .getwp = s3cmmc_getwp,
-};
-
-int s3cmmc_initialize(bd_t *bis, int (*getcd)(struct mmc *),
- int (*getwp)(struct mmc *))
-{
- struct s3cmmc_priv *priv;
- struct mmc *mmc;
- struct mmc_config *cfg;
-
- priv = calloc(1, sizeof(*priv));
- if (!priv)
- return -ENOMEM;
- cfg = &priv->cfg;
-
- cfg->name = "S3C MMC";
- cfg->ops = &s3cmmc_ops;
- cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
- cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_HS;
- cfg->f_min = 400000;
- cfg->f_max = get_PCLK() / 2;
- cfg->b_max = 0x80;
-
-#if defined(CONFIG_S3C2410)
- /*
- * S3C2410 has some bug that prevents reliable
- * operation at higher speed
- */
- cfg->f_max /= 2;
-#endif
-
- mmc = mmc_create(cfg, priv);
- if (!mmc) {
- free(priv);
- return -ENOMEM;
- }
-
- return 0;
-}
projects / project / bcm63xx / u-boot.git / commitdiff