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git01.mediatek.com / filogic / uboot / 42d9df7a8ddaef4863d8fb05e9b63f4e3b7b44c5 / . / drivers / mmc / piton_mmc.c
blob: 9f5da6d6339b34ae68cfb09bcf498d476d4608ac [file] [log] [blame]
Tianrui Wei8cfc7c52021-07-01 12:54:20 +0800[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2009 SAMSUNG Electronics
4 * Minkyu Kang <mk7.kang@samsung.com>
5 * Jaehoon Chung <jh80.chung@samsung.com>
6 * Portions Copyright 2011-2019 NVIDIA Corporation
7 * Portions Copyright 2021 Tianrui Wei
8 * This file is adapted from tegra_mmc.c
9 * Tianrui Wei <tianrui-wei@outlook.com>
10 */
11
12#include <asm/gpio.h>
13#include <asm/io.h>
14#include <common.h>
15#include <div64.h>
16#include <dm.h>
17#include <errno.h>
18#include <linux/bitops.h>
19#include <linux/delay.h>
20#include <linux/err.h>
21#include <linux/types.h>
22#include <linux/sizes.h>
23#include <log.h>
24#include <mmc.h>
25
26
27#define PITON_MMC_DUMMY_F_MAX 20000000
28#define PITON_MMC_DUMMY_F_MIN 10000000
29#define PITON_MMC_DUMMY_CAPACITY SZ_4G << 3
30#define PITON_MMC_DUMMY_B_MAX SZ_4G
31
32struct piton_mmc_plat {
33 struct mmc_config cfg;
34 struct mmc mmc;
35};
36
37struct piton_mmc_priv {
38 void __iomem *base_addr;
39};
40
41static int piton_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
42 struct mmc_data *data)
43{
44 if (!data)
45 return 0;
46
47 struct piton_mmc_priv *priv = dev_get_priv(dev);
48 u32 *buff, *start_addr, *write_src;
49 size_t byte_cnt, start_block;
50
51 buff = (u32 *)data->dest;
52 write_src = (u32 *)data->src;
53 start_block = cmd->cmdarg;
54 start_addr = priv->base_addr + start_block;
55
56 /* if there is a read */
57 for (byte_cnt = data->blocks * data->blocksize; byte_cnt;
58 byte_cnt -= sizeof(u32)) {
59 if (data->flags & MMC_DATA_READ) {
60 *buff++ = readl(start_addr++);
61 }
62 else if (data->flags & MMC_DATA_WRITE) {
63 writel(*write_src++,start_addr++);
64 }
65 }
66 return 0;
67}
68
69static int piton_mmc_ofdata_to_platdata(struct udevice *dev)
70{
71 struct piton_mmc_priv *priv = dev_get_priv(dev);
72 struct piton_mmc_plat *plat = dev_get_plat(dev);
73 struct mmc_config *cfg;
74 struct mmc *mmc;
75 struct blk_desc *bdesc;
76
77 priv->base_addr = (void *)dev_read_addr(dev);
78 cfg = &plat->cfg;
79 cfg->name = "PITON MMC";
80 cfg->host_caps = MMC_MODE_8BIT;
81 cfg->f_max = PITON_MMC_DUMMY_F_MAX;
82 cfg->f_min = PITON_MMC_DUMMY_F_MIN;
83 cfg->voltages = MMC_VDD_21_22;
84
85 mmc = &plat->mmc;
86 mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
87 mmc->capacity_user = PITON_MMC_DUMMY_CAPACITY;
88 mmc->capacity_user *= mmc->read_bl_len;
89 mmc->capacity_boot = 0;
90 mmc->capacity_rpmb = 0;
91 for (int i = 0; i < 4; i++)
92 mmc->capacity_gp[i] = 0;
93 mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
94 mmc->has_init = 1;
95
96 bdesc = mmc_get_blk_desc(mmc);
97 bdesc->lun = 0;
98 bdesc->hwpart = 0;
99 bdesc->type = 0;
100 bdesc->blksz = mmc->read_bl_len;
101 bdesc->log2blksz = LOG2(bdesc->blksz);
102 bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len);
103
104 return 0;
105}
106
107static int piton_mmc_getcd(struct udevice *dev)
108{
109 return 1;
110}
111
112static const struct dm_mmc_ops piton_mmc_ops = {
113 .send_cmd = piton_mmc_send_cmd,
114 .get_cd = piton_mmc_getcd,
115};
116
117static int piton_mmc_probe(struct udevice *dev)
118{
119 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
120 struct piton_mmc_plat *plat = dev_get_plat(dev);
121 struct mmc_config *cfg = &plat->cfg;
122
123 cfg->name = dev->name;
124 upriv->mmc = &plat->mmc;
125 upriv->mmc->has_init = 1;
126 upriv->mmc->capacity = PITON_MMC_DUMMY_CAPACITY;
127 upriv->mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
128 return 0;
129}
130
131static int piton_mmc_bind(struct udevice *dev)
132{
133 struct piton_mmc_plat *plat = dev_get_plat(dev);
134 struct mmc_config *cfg = &plat->cfg;
135
136 cfg->name = dev->name;
137 cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
138 cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
139 cfg->f_min = PITON_MMC_DUMMY_F_MIN;
140 cfg->f_max = PITON_MMC_DUMMY_F_MAX;
141 cfg->b_max = MMC_MAX_BLOCK_LEN;
142
143 return mmc_bind(dev, &plat->mmc, cfg);
144}
145
146static const struct udevice_id piton_mmc_ids[] = {
147 {.compatible = "openpiton,piton-mmc"},
148 {/* sentinel */}
149};
150
151U_BOOT_DRIVER(piton_mmc_drv) = {
152 .name = "piton_mmc",
153 .id = UCLASS_MMC,
154 .of_match = piton_mmc_ids,
155 .of_to_plat = piton_mmc_ofdata_to_platdata,
156 .bind = piton_mmc_bind,
157 .probe = piton_mmc_probe,
158 .ops = &piton_mmc_ops,
159 .plat_auto = sizeof(struct piton_mmc_plat),
160 .priv_auto = sizeof(struct piton_mmc_priv),
161};