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d6b156eb90
This commit adds support to piton_mmc driver for OpenPiton-riscv64 This driver has many things set as preconfigured because the hardware automatically configures most of the settings during startup. Signed-off-by: Tianrui Wei <tianrui-wei@outlook.com> Signed-off-by: Jonathan Balkind <jbalkind@ucsb.edu> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
162 lines
3.9 KiB
C
162 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2009 SAMSUNG Electronics
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* Minkyu Kang <mk7.kang@samsung.com>
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* Jaehoon Chung <jh80.chung@samsung.com>
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* Portions Copyright 2011-2019 NVIDIA Corporation
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* Portions Copyright 2021 Tianrui Wei
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* This file is adapted from tegra_mmc.c
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* Tianrui Wei <tianrui-wei@outlook.com>
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*/
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <common.h>
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#include <div64.h>
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#include <dm.h>
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#include <errno.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/types.h>
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#include <linux/sizes.h>
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#include <log.h>
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#include <mmc.h>
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#define PITON_MMC_DUMMY_F_MAX 20000000
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#define PITON_MMC_DUMMY_F_MIN 10000000
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#define PITON_MMC_DUMMY_CAPACITY SZ_4G << 3
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#define PITON_MMC_DUMMY_B_MAX SZ_4G
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struct piton_mmc_plat {
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struct mmc_config cfg;
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struct mmc mmc;
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};
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struct piton_mmc_priv {
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void __iomem *base_addr;
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};
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static int piton_mmc_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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if (!data)
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return 0;
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struct piton_mmc_priv *priv = dev_get_priv(dev);
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u32 *buff, *start_addr, *write_src;
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size_t byte_cnt, start_block;
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buff = (u32 *)data->dest;
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write_src = (u32 *)data->src;
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start_block = cmd->cmdarg;
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start_addr = priv->base_addr + start_block;
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/* if there is a read */
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for (byte_cnt = data->blocks * data->blocksize; byte_cnt;
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byte_cnt -= sizeof(u32)) {
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if (data->flags & MMC_DATA_READ) {
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*buff++ = readl(start_addr++);
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}
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else if (data->flags & MMC_DATA_WRITE) {
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writel(*write_src++,start_addr++);
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}
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}
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return 0;
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}
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static int piton_mmc_ofdata_to_platdata(struct udevice *dev)
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{
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struct piton_mmc_priv *priv = dev_get_priv(dev);
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struct piton_mmc_plat *plat = dev_get_plat(dev);
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struct mmc_config *cfg;
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struct mmc *mmc;
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struct blk_desc *bdesc;
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priv->base_addr = (void *)dev_read_addr(dev);
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cfg = &plat->cfg;
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cfg->name = "PITON MMC";
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cfg->host_caps = MMC_MODE_8BIT;
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cfg->f_max = PITON_MMC_DUMMY_F_MAX;
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cfg->f_min = PITON_MMC_DUMMY_F_MIN;
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cfg->voltages = MMC_VDD_21_22;
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mmc = &plat->mmc;
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mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
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mmc->capacity_user = PITON_MMC_DUMMY_CAPACITY;
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mmc->capacity_user *= mmc->read_bl_len;
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mmc->capacity_boot = 0;
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mmc->capacity_rpmb = 0;
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for (int i = 0; i < 4; i++)
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mmc->capacity_gp[i] = 0;
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mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
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mmc->has_init = 1;
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bdesc = mmc_get_blk_desc(mmc);
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bdesc->lun = 0;
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bdesc->hwpart = 0;
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bdesc->type = 0;
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bdesc->blksz = mmc->read_bl_len;
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bdesc->log2blksz = LOG2(bdesc->blksz);
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bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len);
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return 0;
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}
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static int piton_mmc_getcd(struct udevice *dev)
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{
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return 1;
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}
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static const struct dm_mmc_ops piton_mmc_ops = {
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.send_cmd = piton_mmc_send_cmd,
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.get_cd = piton_mmc_getcd,
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};
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static int piton_mmc_probe(struct udevice *dev)
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{
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struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
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struct piton_mmc_plat *plat = dev_get_plat(dev);
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struct mmc_config *cfg = &plat->cfg;
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cfg->name = dev->name;
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upriv->mmc = &plat->mmc;
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upriv->mmc->has_init = 1;
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upriv->mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
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upriv->mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
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return 0;
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}
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static int piton_mmc_bind(struct udevice *dev)
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{
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struct piton_mmc_plat *plat = dev_get_plat(dev);
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struct mmc_config *cfg = &plat->cfg;
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cfg->name = dev->name;
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cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
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cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
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cfg->f_min = PITON_MMC_DUMMY_F_MIN;
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cfg->f_max = PITON_MMC_DUMMY_F_MAX;
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cfg->b_max = MMC_MAX_BLOCK_LEN;
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return mmc_bind(dev, &plat->mmc, cfg);
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}
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static const struct udevice_id piton_mmc_ids[] = {
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{.compatible = "openpiton,piton-mmc"},
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{/* sentinel */}
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};
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U_BOOT_DRIVER(piton_mmc_drv) = {
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.name = "piton_mmc",
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.id = UCLASS_MMC,
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.of_match = piton_mmc_ids,
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.of_to_plat = piton_mmc_ofdata_to_platdata,
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.bind = piton_mmc_bind,
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.probe = piton_mmc_probe,
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.ops = &piton_mmc_ops,
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.plat_auto = sizeof(struct piton_mmc_plat),
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.priv_auto = sizeof(struct piton_mmc_priv),
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};
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