795 lines
19 KiB
C
795 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <fdtdec.h>
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#include <mmc.h>
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#include <dm.h>
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#include <dm/pinctrl.h>
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#include <linux/compat.h>
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#include <linux/dma-direction.h>
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#include <linux/io.h>
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#include <linux/sizes.h>
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#include <power/regulator.h>
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#include <asm/unaligned.h>
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#include "tmio-common.h"
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DECLARE_GLOBAL_DATA_PTR;
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static u64 tmio_sd_readq(struct tmio_sd_priv *priv, unsigned int reg)
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{
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return readq(priv->regbase + (reg << 1));
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}
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static void tmio_sd_writeq(struct tmio_sd_priv *priv,
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u64 val, unsigned int reg)
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{
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writeq(val, priv->regbase + (reg << 1));
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}
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static u16 tmio_sd_readw(struct tmio_sd_priv *priv, unsigned int reg)
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{
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return readw(priv->regbase + (reg >> 1));
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}
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static void tmio_sd_writew(struct tmio_sd_priv *priv,
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u16 val, unsigned int reg)
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{
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writew(val, priv->regbase + (reg >> 1));
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}
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u32 tmio_sd_readl(struct tmio_sd_priv *priv, unsigned int reg)
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{
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u32 val;
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if (priv->caps & TMIO_SD_CAP_64BIT)
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return readl(priv->regbase + (reg << 1));
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else if (priv->caps & TMIO_SD_CAP_16BIT) {
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val = readw(priv->regbase + (reg >> 1)) & 0xffff;
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if ((reg == TMIO_SD_RSP10) || (reg == TMIO_SD_RSP32) ||
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(reg == TMIO_SD_RSP54) || (reg == TMIO_SD_RSP76)) {
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val |= readw(priv->regbase + (reg >> 1) + 2) << 16;
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}
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return val;
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} else
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return readl(priv->regbase + reg);
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}
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void tmio_sd_writel(struct tmio_sd_priv *priv,
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u32 val, unsigned int reg)
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{
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if (priv->caps & TMIO_SD_CAP_64BIT)
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writel(val, priv->regbase + (reg << 1));
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else if (priv->caps & TMIO_SD_CAP_16BIT) {
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writew(val & 0xffff, priv->regbase + (reg >> 1));
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if (reg == TMIO_SD_INFO1 || reg == TMIO_SD_INFO1_MASK ||
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reg == TMIO_SD_INFO2 || reg == TMIO_SD_INFO2_MASK ||
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reg == TMIO_SD_ARG)
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writew(val >> 16, priv->regbase + (reg >> 1) + 2);
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} else
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writel(val, priv->regbase + reg);
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}
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static dma_addr_t __dma_map_single(void *ptr, size_t size,
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enum dma_data_direction dir)
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{
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unsigned long addr = (unsigned long)ptr;
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if (dir == DMA_FROM_DEVICE)
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invalidate_dcache_range(addr, addr + size);
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else
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flush_dcache_range(addr, addr + size);
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return addr;
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}
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static void __dma_unmap_single(dma_addr_t addr, size_t size,
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enum dma_data_direction dir)
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{
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if (dir != DMA_TO_DEVICE)
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invalidate_dcache_range(addr, addr + size);
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}
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static int tmio_sd_check_error(struct udevice *dev, struct mmc_cmd *cmd)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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u32 info2 = tmio_sd_readl(priv, TMIO_SD_INFO2);
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if (info2 & TMIO_SD_INFO2_ERR_RTO) {
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/*
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* TIMEOUT must be returned for unsupported command. Do not
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* display error log since this might be a part of sequence to
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* distinguish between SD and MMC.
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*/
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return -ETIMEDOUT;
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}
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if (info2 & TMIO_SD_INFO2_ERR_TO) {
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dev_err(dev, "timeout error\n");
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return -ETIMEDOUT;
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}
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if (info2 & (TMIO_SD_INFO2_ERR_END | TMIO_SD_INFO2_ERR_CRC |
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TMIO_SD_INFO2_ERR_IDX)) {
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if ((cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK) &&
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(cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200))
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dev_err(dev, "communication out of sync\n");
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return -EILSEQ;
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}
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if (info2 & (TMIO_SD_INFO2_ERR_ILA | TMIO_SD_INFO2_ERR_ILR |
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TMIO_SD_INFO2_ERR_ILW)) {
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dev_err(dev, "illegal access\n");
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return -EIO;
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}
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return 0;
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}
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static int tmio_sd_wait_for_irq(struct udevice *dev, struct mmc_cmd *cmd,
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unsigned int reg, u32 flag)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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long wait = 1000000;
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int ret;
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while (!(tmio_sd_readl(priv, reg) & flag)) {
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if (wait-- < 0) {
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dev_err(dev, "timeout\n");
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return -ETIMEDOUT;
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}
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ret = tmio_sd_check_error(dev, cmd);
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if (ret)
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return ret;
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udelay(1);
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}
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return 0;
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}
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#define tmio_pio_read_fifo(__width, __suffix) \
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static void tmio_pio_read_fifo_##__width(struct tmio_sd_priv *priv, \
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char *pbuf, uint blksz) \
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{ \
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u##__width *buf = (u##__width *)pbuf; \
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int i; \
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\
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if (likely(IS_ALIGNED((uintptr_t)buf, ((__width) / 8)))) { \
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for (i = 0; i < blksz / ((__width) / 8); i++) { \
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*buf++ = tmio_sd_read##__suffix(priv, \
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TMIO_SD_BUF); \
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} \
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} else { \
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for (i = 0; i < blksz / ((__width) / 8); i++) { \
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u##__width data; \
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data = tmio_sd_read##__suffix(priv, \
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TMIO_SD_BUF); \
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put_unaligned(data, buf++); \
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} \
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} \
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}
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tmio_pio_read_fifo(64, q)
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tmio_pio_read_fifo(32, l)
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tmio_pio_read_fifo(16, w)
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static int tmio_sd_pio_read_one_block(struct udevice *dev, struct mmc_cmd *cmd,
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char *pbuf, uint blocksize)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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int ret;
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/* wait until the buffer is filled with data */
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ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
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TMIO_SD_INFO2_BRE);
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if (ret)
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return ret;
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/*
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* Clear the status flag _before_ read the buffer out because
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* TMIO_SD_INFO2_BRE is edge-triggered, not level-triggered.
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*/
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tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
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if (priv->caps & TMIO_SD_CAP_64BIT)
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tmio_pio_read_fifo_64(priv, pbuf, blocksize);
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else if (priv->caps & TMIO_SD_CAP_16BIT)
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tmio_pio_read_fifo_16(priv, pbuf, blocksize);
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else
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tmio_pio_read_fifo_32(priv, pbuf, blocksize);
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return 0;
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}
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#define tmio_pio_write_fifo(__width, __suffix) \
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static void tmio_pio_write_fifo_##__width(struct tmio_sd_priv *priv, \
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const char *pbuf, uint blksz)\
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{ \
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const u##__width *buf = (const u##__width *)pbuf; \
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int i; \
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\
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if (likely(IS_ALIGNED((uintptr_t)buf, ((__width) / 8)))) { \
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for (i = 0; i < blksz / ((__width) / 8); i++) { \
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tmio_sd_write##__suffix(priv, *buf++, \
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TMIO_SD_BUF); \
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} \
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} else { \
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for (i = 0; i < blksz / ((__width) / 8); i++) { \
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u##__width data = get_unaligned(buf++); \
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tmio_sd_write##__suffix(priv, data, \
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TMIO_SD_BUF); \
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} \
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} \
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}
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tmio_pio_write_fifo(64, q)
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tmio_pio_write_fifo(32, l)
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tmio_pio_write_fifo(16, w)
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static int tmio_sd_pio_write_one_block(struct udevice *dev, struct mmc_cmd *cmd,
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const char *pbuf, uint blocksize)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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int ret;
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/* wait until the buffer becomes empty */
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ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
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TMIO_SD_INFO2_BWE);
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if (ret)
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return ret;
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tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
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if (priv->caps & TMIO_SD_CAP_64BIT)
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tmio_pio_write_fifo_64(priv, pbuf, blocksize);
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else if (priv->caps & TMIO_SD_CAP_16BIT)
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tmio_pio_write_fifo_16(priv, pbuf, blocksize);
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else
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tmio_pio_write_fifo_32(priv, pbuf, blocksize);
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return 0;
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}
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static int tmio_sd_pio_xfer(struct udevice *dev, struct mmc_cmd *cmd,
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struct mmc_data *data)
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{
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const char *src = data->src;
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char *dest = data->dest;
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int i, ret;
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for (i = 0; i < data->blocks; i++) {
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if (data->flags & MMC_DATA_READ)
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ret = tmio_sd_pio_read_one_block(dev, cmd, dest,
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data->blocksize);
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else
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ret = tmio_sd_pio_write_one_block(dev, cmd, src,
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data->blocksize);
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if (ret)
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return ret;
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if (data->flags & MMC_DATA_READ)
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dest += data->blocksize;
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else
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src += data->blocksize;
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}
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return 0;
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}
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static void tmio_sd_dma_start(struct tmio_sd_priv *priv,
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dma_addr_t dma_addr)
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{
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u32 tmp;
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tmio_sd_writel(priv, 0, TMIO_SD_DMA_INFO1);
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tmio_sd_writel(priv, 0, TMIO_SD_DMA_INFO2);
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/* enable DMA */
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tmp = tmio_sd_readl(priv, TMIO_SD_EXTMODE);
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tmp |= TMIO_SD_EXTMODE_DMA_EN;
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tmio_sd_writel(priv, tmp, TMIO_SD_EXTMODE);
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tmio_sd_writel(priv, dma_addr & U32_MAX, TMIO_SD_DMA_ADDR_L);
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/* suppress the warning "right shift count >= width of type" */
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dma_addr >>= min_t(int, 32, 8 * sizeof(dma_addr));
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tmio_sd_writel(priv, dma_addr & U32_MAX, TMIO_SD_DMA_ADDR_H);
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tmio_sd_writel(priv, TMIO_SD_DMA_CTL_START, TMIO_SD_DMA_CTL);
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}
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static int tmio_sd_dma_wait_for_irq(struct udevice *dev, u32 flag,
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unsigned int blocks)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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long wait = 1000000 + 10 * blocks;
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while (!(tmio_sd_readl(priv, TMIO_SD_DMA_INFO1) & flag)) {
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if (wait-- < 0) {
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dev_err(dev, "timeout during DMA\n");
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return -ETIMEDOUT;
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}
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udelay(10);
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}
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if (tmio_sd_readl(priv, TMIO_SD_DMA_INFO2)) {
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dev_err(dev, "error during DMA\n");
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return -EIO;
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}
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return 0;
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}
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static int tmio_sd_dma_xfer(struct udevice *dev, struct mmc_data *data)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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size_t len = data->blocks * data->blocksize;
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void *buf;
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enum dma_data_direction dir;
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dma_addr_t dma_addr;
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u32 poll_flag, tmp;
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int ret;
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tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
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if (data->flags & MMC_DATA_READ) {
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buf = data->dest;
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dir = DMA_FROM_DEVICE;
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/*
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* The DMA READ completion flag position differs on Socionext
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* and Renesas SoCs. It is bit 20 on Socionext SoCs and using
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* bit 17 is a hardware bug and forbidden. It is either bit 17
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* or bit 20 on Renesas SoCs, depending on SoC.
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*/
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poll_flag = priv->read_poll_flag;
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tmp |= TMIO_SD_DMA_MODE_DIR_RD;
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} else {
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buf = (void *)data->src;
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dir = DMA_TO_DEVICE;
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poll_flag = TMIO_SD_DMA_INFO1_END_WR;
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tmp &= ~TMIO_SD_DMA_MODE_DIR_RD;
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}
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tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
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dma_addr = __dma_map_single(buf, len, dir);
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tmio_sd_dma_start(priv, dma_addr);
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ret = tmio_sd_dma_wait_for_irq(dev, poll_flag, data->blocks);
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if (poll_flag == TMIO_SD_DMA_INFO1_END_RD)
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udelay(1);
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__dma_unmap_single(dma_addr, len, dir);
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return ret;
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}
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/* check if the address is DMA'able */
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static bool tmio_sd_addr_is_dmaable(const char *src)
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{
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uintptr_t addr = (uintptr_t)src;
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if (!IS_ALIGNED(addr, TMIO_SD_DMA_MINALIGN))
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return false;
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#if defined(CONFIG_RCAR_GEN3)
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/* Gen3 DMA has 32bit limit */
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if (addr >> 32)
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return false;
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#endif
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#if defined(CONFIG_ARCH_UNIPHIER) && !defined(CONFIG_ARM64) && \
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defined(CONFIG_SPL_BUILD)
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/*
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* For UniPhier ARMv7 SoCs, the stack is allocated in the locked ways
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* of L2, which is unreachable from the DMA engine.
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*/
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if (addr < CONFIG_SPL_STACK)
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return false;
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#endif
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return true;
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}
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int tmio_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
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struct mmc_data *data)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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int ret;
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u32 tmp;
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if (tmio_sd_readl(priv, TMIO_SD_INFO2) & TMIO_SD_INFO2_CBSY) {
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dev_err(dev, "command busy\n");
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return -EBUSY;
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}
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/* clear all status flags */
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tmio_sd_writel(priv, 0, TMIO_SD_INFO1);
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tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
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/* disable DMA once */
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tmp = tmio_sd_readl(priv, TMIO_SD_EXTMODE);
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tmp &= ~TMIO_SD_EXTMODE_DMA_EN;
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tmio_sd_writel(priv, tmp, TMIO_SD_EXTMODE);
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tmio_sd_writel(priv, cmd->cmdarg, TMIO_SD_ARG);
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tmp = cmd->cmdidx;
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if (data) {
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tmio_sd_writel(priv, data->blocksize, TMIO_SD_SIZE);
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tmio_sd_writel(priv, data->blocks, TMIO_SD_SECCNT);
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/* Do not send CMD12 automatically */
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tmp |= TMIO_SD_CMD_NOSTOP | TMIO_SD_CMD_DATA;
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if (data->blocks > 1)
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tmp |= TMIO_SD_CMD_MULTI;
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if (data->flags & MMC_DATA_READ)
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tmp |= TMIO_SD_CMD_RD;
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}
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/*
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* Do not use the response type auto-detection on this hardware.
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* CMD8, for example, has different response types on SD and eMMC,
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* while this controller always assumes the response type for SD.
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* Set the response type manually.
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*/
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switch (cmd->resp_type) {
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case MMC_RSP_NONE:
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tmp |= TMIO_SD_CMD_RSP_NONE;
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break;
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case MMC_RSP_R1:
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tmp |= TMIO_SD_CMD_RSP_R1;
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break;
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case MMC_RSP_R1b:
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tmp |= TMIO_SD_CMD_RSP_R1B;
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break;
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case MMC_RSP_R2:
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tmp |= TMIO_SD_CMD_RSP_R2;
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break;
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case MMC_RSP_R3:
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tmp |= TMIO_SD_CMD_RSP_R3;
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break;
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default:
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dev_err(dev, "unknown response type\n");
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return -EINVAL;
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}
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dev_dbg(dev, "sending CMD%d (SD_CMD=%08x, SD_ARG=%08x)\n",
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cmd->cmdidx, tmp, cmd->cmdarg);
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tmio_sd_writel(priv, tmp, TMIO_SD_CMD);
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ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO1,
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TMIO_SD_INFO1_RSP);
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if (ret)
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return ret;
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if (cmd->resp_type & MMC_RSP_136) {
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u32 rsp_127_104 = tmio_sd_readl(priv, TMIO_SD_RSP76);
|
|
u32 rsp_103_72 = tmio_sd_readl(priv, TMIO_SD_RSP54);
|
|
u32 rsp_71_40 = tmio_sd_readl(priv, TMIO_SD_RSP32);
|
|
u32 rsp_39_8 = tmio_sd_readl(priv, TMIO_SD_RSP10);
|
|
|
|
cmd->response[0] = ((rsp_127_104 & 0x00ffffff) << 8) |
|
|
((rsp_103_72 & 0xff000000) >> 24);
|
|
cmd->response[1] = ((rsp_103_72 & 0x00ffffff) << 8) |
|
|
((rsp_71_40 & 0xff000000) >> 24);
|
|
cmd->response[2] = ((rsp_71_40 & 0x00ffffff) << 8) |
|
|
((rsp_39_8 & 0xff000000) >> 24);
|
|
cmd->response[3] = (rsp_39_8 & 0xffffff) << 8;
|
|
} else {
|
|
/* bit 39-8 */
|
|
cmd->response[0] = tmio_sd_readl(priv, TMIO_SD_RSP10);
|
|
}
|
|
|
|
if (data) {
|
|
/* use DMA if the HW supports it and the buffer is aligned */
|
|
if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL &&
|
|
tmio_sd_addr_is_dmaable(data->src))
|
|
ret = tmio_sd_dma_xfer(dev, data);
|
|
else
|
|
ret = tmio_sd_pio_xfer(dev, cmd, data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO1,
|
|
TMIO_SD_INFO1_CMP);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
|
|
TMIO_SD_INFO2_SCLKDIVEN);
|
|
}
|
|
|
|
static int tmio_sd_set_bus_width(struct tmio_sd_priv *priv,
|
|
struct mmc *mmc)
|
|
{
|
|
u32 val, tmp;
|
|
|
|
switch (mmc->bus_width) {
|
|
case 0:
|
|
case 1:
|
|
val = TMIO_SD_OPTION_WIDTH_1;
|
|
break;
|
|
case 4:
|
|
val = TMIO_SD_OPTION_WIDTH_4;
|
|
break;
|
|
case 8:
|
|
val = TMIO_SD_OPTION_WIDTH_8;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
tmp = tmio_sd_readl(priv, TMIO_SD_OPTION);
|
|
tmp &= ~TMIO_SD_OPTION_WIDTH_MASK;
|
|
tmp |= val;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_OPTION);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tmio_sd_set_ddr_mode(struct tmio_sd_priv *priv,
|
|
struct mmc *mmc)
|
|
{
|
|
u32 tmp;
|
|
|
|
tmp = tmio_sd_readl(priv, TMIO_SD_IF_MODE);
|
|
if (mmc->ddr_mode)
|
|
tmp |= TMIO_SD_IF_MODE_DDR;
|
|
else
|
|
tmp &= ~TMIO_SD_IF_MODE_DDR;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_IF_MODE);
|
|
}
|
|
|
|
static ulong tmio_sd_clk_get_rate(struct tmio_sd_priv *priv)
|
|
{
|
|
return priv->clk_get_rate(priv);
|
|
}
|
|
|
|
static void tmio_sd_set_clk_rate(struct tmio_sd_priv *priv, struct mmc *mmc)
|
|
{
|
|
unsigned int divisor;
|
|
u32 tmp, val = 0;
|
|
ulong mclk;
|
|
|
|
if (mmc->clock) {
|
|
mclk = tmio_sd_clk_get_rate(priv);
|
|
|
|
divisor = DIV_ROUND_UP(mclk, mmc->clock);
|
|
|
|
/* Do not set divider to 0xff in DDR mode */
|
|
if (mmc->ddr_mode && (divisor == 1))
|
|
divisor = 2;
|
|
|
|
if (divisor <= 1)
|
|
val = (priv->caps & TMIO_SD_CAP_RCAR) ?
|
|
TMIO_SD_CLKCTL_RCAR_DIV1 : TMIO_SD_CLKCTL_DIV1;
|
|
else if (divisor <= 2)
|
|
val = TMIO_SD_CLKCTL_DIV2;
|
|
else if (divisor <= 4)
|
|
val = TMIO_SD_CLKCTL_DIV4;
|
|
else if (divisor <= 8)
|
|
val = TMIO_SD_CLKCTL_DIV8;
|
|
else if (divisor <= 16)
|
|
val = TMIO_SD_CLKCTL_DIV16;
|
|
else if (divisor <= 32)
|
|
val = TMIO_SD_CLKCTL_DIV32;
|
|
else if (divisor <= 64)
|
|
val = TMIO_SD_CLKCTL_DIV64;
|
|
else if (divisor <= 128)
|
|
val = TMIO_SD_CLKCTL_DIV128;
|
|
else if (divisor <= 256)
|
|
val = TMIO_SD_CLKCTL_DIV256;
|
|
else if (divisor <= 512 || !(priv->caps & TMIO_SD_CAP_DIV1024))
|
|
val = TMIO_SD_CLKCTL_DIV512;
|
|
else
|
|
val = TMIO_SD_CLKCTL_DIV1024;
|
|
}
|
|
|
|
tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
|
|
if (mmc->clock &&
|
|
!((tmp & TMIO_SD_CLKCTL_SCLKEN) &&
|
|
((tmp & TMIO_SD_CLKCTL_DIV_MASK) == val))) {
|
|
/*
|
|
* Stop the clock before changing its rate
|
|
* to avoid a glitch signal
|
|
*/
|
|
tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
|
|
|
|
/* Change the clock rate. */
|
|
tmp &= ~TMIO_SD_CLKCTL_DIV_MASK;
|
|
tmp |= val;
|
|
}
|
|
|
|
/* Enable or Disable the clock */
|
|
if (mmc->clk_disable) {
|
|
tmp |= TMIO_SD_CLKCTL_OFFEN;
|
|
tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
|
|
} else {
|
|
tmp &= ~TMIO_SD_CLKCTL_OFFEN;
|
|
tmp |= TMIO_SD_CLKCTL_SCLKEN;
|
|
}
|
|
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
|
|
|
|
udelay(1000);
|
|
}
|
|
|
|
static void tmio_sd_set_pins(struct udevice *dev)
|
|
{
|
|
__maybe_unused struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
|
|
#ifdef CONFIG_DM_REGULATOR
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
|
|
if (priv->vqmmc_dev) {
|
|
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
|
|
regulator_set_value(priv->vqmmc_dev, 1800000);
|
|
else
|
|
regulator_set_value(priv->vqmmc_dev, 3300000);
|
|
regulator_set_enable(priv->vqmmc_dev, true);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PINCTRL
|
|
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
|
|
pinctrl_select_state(dev, "state_uhs");
|
|
else
|
|
pinctrl_select_state(dev, "default");
|
|
#endif
|
|
}
|
|
|
|
int tmio_sd_set_ios(struct udevice *dev)
|
|
{
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
int ret;
|
|
|
|
dev_dbg(dev, "clock %uHz, DDRmode %d, width %u\n",
|
|
mmc->clock, mmc->ddr_mode, mmc->bus_width);
|
|
|
|
tmio_sd_set_clk_rate(priv, mmc);
|
|
ret = tmio_sd_set_bus_width(priv, mmc);
|
|
if (ret)
|
|
return ret;
|
|
tmio_sd_set_ddr_mode(priv, mmc);
|
|
tmio_sd_set_pins(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int tmio_sd_get_cd(struct udevice *dev)
|
|
{
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
|
|
if (priv->caps & TMIO_SD_CAP_NONREMOVABLE)
|
|
return 1;
|
|
|
|
return !!(tmio_sd_readl(priv, TMIO_SD_INFO1) &
|
|
TMIO_SD_INFO1_CD);
|
|
}
|
|
|
|
static void tmio_sd_host_init(struct tmio_sd_priv *priv)
|
|
{
|
|
u32 tmp;
|
|
|
|
/* soft reset of the host */
|
|
tmp = tmio_sd_readl(priv, TMIO_SD_SOFT_RST);
|
|
tmp &= ~TMIO_SD_SOFT_RST_RSTX;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_SOFT_RST);
|
|
tmp |= TMIO_SD_SOFT_RST_RSTX;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_SOFT_RST);
|
|
|
|
/* FIXME: implement eMMC hw_reset */
|
|
|
|
tmio_sd_writel(priv, TMIO_SD_STOP_SEC, TMIO_SD_STOP);
|
|
|
|
/*
|
|
* Connected to 32bit AXI.
|
|
* This register dropped backward compatibility at version 0x10.
|
|
* Write an appropriate value depending on the IP version.
|
|
*/
|
|
if (priv->version >= 0x10) {
|
|
if (priv->caps & TMIO_SD_CAP_64BIT)
|
|
tmio_sd_writel(priv, 0x000, TMIO_SD_HOST_MODE);
|
|
else
|
|
tmio_sd_writel(priv, 0x101, TMIO_SD_HOST_MODE);
|
|
} else {
|
|
tmio_sd_writel(priv, 0x0, TMIO_SD_HOST_MODE);
|
|
}
|
|
|
|
if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL) {
|
|
tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
|
|
tmp |= TMIO_SD_DMA_MODE_ADDR_INC;
|
|
tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
|
|
}
|
|
}
|
|
|
|
int tmio_sd_bind(struct udevice *dev)
|
|
{
|
|
struct tmio_sd_plat *plat = dev_get_platdata(dev);
|
|
|
|
return mmc_bind(dev, &plat->mmc, &plat->cfg);
|
|
}
|
|
|
|
int tmio_sd_probe(struct udevice *dev, u32 quirks)
|
|
{
|
|
struct tmio_sd_plat *plat = dev_get_platdata(dev);
|
|
struct tmio_sd_priv *priv = dev_get_priv(dev);
|
|
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
|
|
fdt_addr_t base;
|
|
ulong mclk;
|
|
int ret;
|
|
|
|
base = devfdt_get_addr(dev);
|
|
if (base == FDT_ADDR_T_NONE)
|
|
return -EINVAL;
|
|
|
|
priv->regbase = devm_ioremap(dev, base, SZ_2K);
|
|
if (!priv->regbase)
|
|
return -ENOMEM;
|
|
|
|
#ifdef CONFIG_DM_REGULATOR
|
|
device_get_supply_regulator(dev, "vqmmc-supply", &priv->vqmmc_dev);
|
|
if (priv->vqmmc_dev)
|
|
regulator_set_value(priv->vqmmc_dev, 3300000);
|
|
#endif
|
|
|
|
ret = mmc_of_parse(dev, &plat->cfg);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to parse host caps\n");
|
|
return ret;
|
|
}
|
|
|
|
plat->cfg.name = dev->name;
|
|
plat->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
|
|
|
|
if (quirks)
|
|
priv->caps = quirks;
|
|
|
|
priv->version = tmio_sd_readl(priv, TMIO_SD_VERSION) &
|
|
TMIO_SD_VERSION_IP;
|
|
dev_dbg(dev, "version %x\n", priv->version);
|
|
if (priv->version >= 0x10) {
|
|
priv->caps |= TMIO_SD_CAP_DMA_INTERNAL;
|
|
priv->caps |= TMIO_SD_CAP_DIV1024;
|
|
}
|
|
|
|
if (fdt_get_property(gd->fdt_blob, dev_of_offset(dev), "non-removable",
|
|
NULL))
|
|
priv->caps |= TMIO_SD_CAP_NONREMOVABLE;
|
|
|
|
tmio_sd_host_init(priv);
|
|
|
|
mclk = tmio_sd_clk_get_rate(priv);
|
|
|
|
plat->cfg.voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
|
|
plat->cfg.f_min = mclk /
|
|
(priv->caps & TMIO_SD_CAP_DIV1024 ? 1024 : 512);
|
|
plat->cfg.f_max = mclk;
|
|
if (quirks & TMIO_SD_CAP_16BIT)
|
|
plat->cfg.b_max = U16_MAX; /* max value of TMIO_SD_SECCNT */
|
|
else
|
|
plat->cfg.b_max = U32_MAX; /* max value of TMIO_SD_SECCNT */
|
|
|
|
upriv->mmc = &plat->mmc;
|
|
|
|
return 0;
|
|
}
|