Commit 4f9f64e4 authored by Tianrui Wei's avatar Tianrui Wei Committed by Leo Yu-Chi Liang
Browse files

mmc: openpiton: add piton_mmc driver



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: default avatarTianrui Wei <tianrui-wei@outlook.com>
Signed-off-by: default avatarJonathan Balkind <jbalkind@ucsb.edu>
Reviewed-by: Jaehoon Chung's avatarJaehoon Chung <jh80.chung@samsung.com>
parent c262bb74
Pipeline #7999 passed with stages
in 49 minutes and 1 second
......@@ -727,6 +727,15 @@ config MMC_SUNXI_HAS_MODE_SWITCH
bool
depends on MMC_SUNXI
config MMC_PITON
bool "MMC support for OpenPiton SoC"
depends on DM_MMC && BLK
help
This selects support for the SD host controller on OpenPiton SoC.
Note that this SD controller directly exposes the contents of the
SD card as memory mapped, so there is no manual configuration
required
config GENERIC_ATMEL_MCI
bool "Atmel Multimedia Card Interface support"
depends on DM_MMC && BLK && ARCH_AT91
......
......@@ -72,6 +72,7 @@ obj-$(CONFIG_MMC_SDHCI_XENON) += xenon_sdhci.o
obj-$(CONFIG_MMC_SDHCI_ZYNQ) += zynq_sdhci.o
obj-$(CONFIG_MMC_SUNXI) += sunxi_mmc.o
obj-$(CONFIG_MMC_PITON) += piton_mmc.o
obj-$(CONFIG_MMC_UNIPHIER) += tmio-common.o uniphier-sd.o
obj-$(CONFIG_RENESAS_SDHI) += tmio-common.o renesas-sdhi.o
obj-$(CONFIG_MMC_BCM2835) += bcm2835_sdhost.o
......
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2009 SAMSUNG Electronics
* Minkyu Kang <mk7.kang@samsung.com>
* Jaehoon Chung <jh80.chung@samsung.com>
* Portions Copyright 2011-2019 NVIDIA Corporation
* Portions Copyright 2021 Tianrui Wei
* This file is adapted from tegra_mmc.c
* Tianrui Wei <tianrui-wei@outlook.com>
*/
#include <asm/gpio.h>
#include <asm/io.h>
#include <common.h>
#include <div64.h>
#include <dm.h>
#include <errno.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/types.h>
#include <linux/sizes.h>
#include <log.h>
#include <mmc.h>
#define PITON_MMC_DUMMY_F_MAX 20000000
#define PITON_MMC_DUMMY_F_MIN 10000000
#define PITON_MMC_DUMMY_CAPACITY SZ_4G << 3
#define PITON_MMC_DUMMY_B_MAX SZ_4G
struct piton_mmc_plat {
struct mmc_config cfg;
struct mmc mmc;
};
struct piton_mmc_priv {
void __iomem *base_addr;
};
static int piton_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
if (!data)
return 0;
struct piton_mmc_priv *priv = dev_get_priv(dev);
u32 *buff, *start_addr, *write_src;
size_t byte_cnt, start_block;
buff = (u32 *)data->dest;
write_src = (u32 *)data->src;
start_block = cmd->cmdarg;
start_addr = priv->base_addr + start_block;
/* if there is a read */
for (byte_cnt = data->blocks * data->blocksize; byte_cnt;
byte_cnt -= sizeof(u32)) {
if (data->flags & MMC_DATA_READ) {
*buff++ = readl(start_addr++);
}
else if (data->flags & MMC_DATA_WRITE) {
writel(*write_src++,start_addr++);
}
}
return 0;
}
static int piton_mmc_ofdata_to_platdata(struct udevice *dev)
{
struct piton_mmc_priv *priv = dev_get_priv(dev);
struct piton_mmc_plat *plat = dev_get_plat(dev);
struct mmc_config *cfg;
struct mmc *mmc;
struct blk_desc *bdesc;
priv->base_addr = (void *)dev_read_addr(dev);
cfg = &plat->cfg;
cfg->name = "PITON MMC";
cfg->host_caps = MMC_MODE_8BIT;
cfg->f_max = PITON_MMC_DUMMY_F_MAX;
cfg->f_min = PITON_MMC_DUMMY_F_MIN;
cfg->voltages = MMC_VDD_21_22;
mmc = &plat->mmc;
mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
mmc->capacity_user = PITON_MMC_DUMMY_CAPACITY;
mmc->capacity_user *= mmc->read_bl_len;
mmc->capacity_boot = 0;
mmc->capacity_rpmb = 0;
for (int i = 0; i < 4; i++)
mmc->capacity_gp[i] = 0;
mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
mmc->has_init = 1;
bdesc = mmc_get_blk_desc(mmc);
bdesc->lun = 0;
bdesc->hwpart = 0;
bdesc->type = 0;
bdesc->blksz = mmc->read_bl_len;
bdesc->log2blksz = LOG2(bdesc->blksz);
bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len);
return 0;
}
static int piton_mmc_getcd(struct udevice *dev)
{
return 1;
}
static const struct dm_mmc_ops piton_mmc_ops = {
.send_cmd = piton_mmc_send_cmd,
.get_cd = piton_mmc_getcd,
};
static int piton_mmc_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct piton_mmc_plat *plat = dev_get_plat(dev);
struct mmc_config *cfg = &plat->cfg;
cfg->name = dev->name;
upriv->mmc = &plat->mmc;
upriv->mmc->has_init = 1;
upriv->mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
upriv->mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
return 0;
}
static int piton_mmc_bind(struct udevice *dev)
{
struct piton_mmc_plat *plat = dev_get_plat(dev);
struct mmc_config *cfg = &plat->cfg;
cfg->name = dev->name;
cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
cfg->f_min = PITON_MMC_DUMMY_F_MIN;
cfg->f_max = PITON_MMC_DUMMY_F_MAX;
cfg->b_max = MMC_MAX_BLOCK_LEN;
return mmc_bind(dev, &plat->mmc, cfg);
}
static const struct udevice_id piton_mmc_ids[] = {
{.compatible = "openpiton,piton-mmc"},
{/* sentinel */}
};
U_BOOT_DRIVER(piton_mmc_drv) = {
.name = "piton_mmc",
.id = UCLASS_MMC,
.of_match = piton_mmc_ids,
.of_to_plat = piton_mmc_ofdata_to_platdata,
.bind = piton_mmc_bind,
.probe = piton_mmc_probe,
.ops = &piton_mmc_ops,
.plat_auto = sizeof(struct piton_mmc_plat),
.priv_auto = sizeof(struct piton_mmc_priv),
};
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