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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> | |
d678a59d | 14 | #include <common.h> |
d6b156eb TW |
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 | ||
32 | struct piton_mmc_plat { | |
33 | struct mmc_config cfg; | |
34 | struct mmc mmc; | |
35 | }; | |
36 | ||
37 | struct piton_mmc_priv { | |
38 | void __iomem *base_addr; | |
39 | }; | |
40 | ||
41 | static 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 | ||
69 | static 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 | ||
a12a73b6 | 77 | priv->base_addr = dev_read_addr_ptr(dev); |
d6b156eb TW |
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 | ||
107 | static int piton_mmc_getcd(struct udevice *dev) | |
108 | { | |
109 | return 1; | |
110 | } | |
111 | ||
112 | static const struct dm_mmc_ops piton_mmc_ops = { | |
113 | .send_cmd = piton_mmc_send_cmd, | |
114 | .get_cd = piton_mmc_getcd, | |
115 | }; | |
116 | ||
117 | static 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 | ||
131 | static 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 | ||
146 | static const struct udevice_id piton_mmc_ids[] = { | |
147 | {.compatible = "openpiton,piton-mmc"}, | |
148 | {/* sentinel */} | |
149 | }; | |
150 | ||
151 | U_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 | }; |