1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// 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 <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 = dev_read_addr_ptr(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),
};
|
