mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 20:54:31 +00:00
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>
161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
// 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),
|
|
};
|