1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <malloc.h>
9 #include <mmc.h>
10 #include "mmc_private.h"
11
12 static struct list_head mmc_devices;
13 static int cur_dev_num = -1;
14
15 #if CONFIG_IS_ENABLED(MMC_TINY)
16 static struct mmc mmc_static;
find_mmc_device(int dev_num)17 struct mmc *find_mmc_device(int dev_num)
18 {
19 return &mmc_static;
20 }
21
mmc_do_preinit(void)22 void mmc_do_preinit(void)
23 {
24 struct mmc *m = &mmc_static;
25 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
26 mmc_set_preinit(m, 1);
27 #endif
28 if (m->preinit)
29 mmc_start_init(m);
30 }
31
mmc_get_blk_desc(struct mmc * mmc)32 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
33 {
34 return &mmc->block_dev;
35 }
36 #else
find_mmc_device(int dev_num)37 struct mmc *find_mmc_device(int dev_num)
38 {
39 struct mmc *m;
40 struct list_head *entry;
41
42 list_for_each(entry, &mmc_devices) {
43 m = list_entry(entry, struct mmc, link);
44
45 if (m->block_dev.devnum == dev_num)
46 return m;
47 }
48
49 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
50 printf("MMC Device %d not found\n", dev_num);
51 #endif
52
53 return NULL;
54 }
55
mmc_get_next_devnum(void)56 int mmc_get_next_devnum(void)
57 {
58 return cur_dev_num++;
59 }
60
mmc_get_blk_desc(struct mmc * mmc)61 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
62 {
63 return &mmc->block_dev;
64 }
65
get_mmc_num(void)66 int get_mmc_num(void)
67 {
68 return cur_dev_num;
69 }
70
mmc_do_preinit(void)71 void mmc_do_preinit(void)
72 {
73 struct mmc *m;
74 struct list_head *entry;
75
76 list_for_each(entry, &mmc_devices) {
77 m = list_entry(entry, struct mmc, link);
78
79 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
80 mmc_set_preinit(m, 1);
81 #endif
82 if (m->preinit)
83 mmc_start_init(m);
84 }
85 }
86 #endif
87
mmc_list_init(void)88 void mmc_list_init(void)
89 {
90 INIT_LIST_HEAD(&mmc_devices);
91 cur_dev_num = 0;
92 }
93
mmc_list_add(struct mmc * mmc)94 void mmc_list_add(struct mmc *mmc)
95 {
96 INIT_LIST_HEAD(&mmc->link);
97
98 list_add_tail(&mmc->link, &mmc_devices);
99 }
100
101 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
print_mmc_devices(char separator)102 void print_mmc_devices(char separator)
103 {
104 struct mmc *m;
105 struct list_head *entry;
106 char *mmc_type;
107
108 list_for_each(entry, &mmc_devices) {
109 m = list_entry(entry, struct mmc, link);
110
111 if (m->has_init)
112 mmc_type = IS_SD(m) ? "SD" : "eMMC";
113 else
114 mmc_type = NULL;
115
116 printf("%s: %d", m->cfg->name, m->block_dev.devnum);
117 if (mmc_type)
118 printf(" (%s)", mmc_type);
119
120 if (entry->next != &mmc_devices) {
121 printf("%c", separator);
122 if (separator != '\n')
123 puts(" ");
124 }
125 }
126
127 printf("\n");
128 }
129
130 #else
print_mmc_devices(char separator)131 void print_mmc_devices(char separator) { }
132 #endif
133
134 #if CONFIG_IS_ENABLED(MMC_TINY)
135 static struct mmc mmc_static = {
136 .dsr_imp = 0,
137 .dsr = 0xffffffff,
138 .block_dev = {
139 .if_type = IF_TYPE_MMC,
140 .removable = 1,
141 .devnum = 0,
142 .block_read = mmc_bread,
143 .block_write = mmc_bwrite,
144 .block_erase = mmc_berase,
145 .part_type = 0,
146 },
147 };
148
mmc_create(const struct mmc_config * cfg,void * priv)149 struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
150 {
151 struct mmc *mmc = &mmc_static;
152
153 mmc->cfg = cfg;
154 mmc->priv = priv;
155
156 return mmc;
157 }
158
mmc_destroy(struct mmc * mmc)159 void mmc_destroy(struct mmc *mmc)
160 {
161 }
162 #else
mmc_create(const struct mmc_config * cfg,void * priv)163 struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
164 {
165 struct blk_desc *bdesc;
166 struct mmc *mmc;
167
168 /* quick validation */
169 if (cfg == NULL || cfg->f_min == 0 ||
170 cfg->f_max == 0 || cfg->b_max == 0)
171 return NULL;
172
173 #if !CONFIG_IS_ENABLED(DM_MMC)
174 if (cfg->ops == NULL || cfg->ops->send_cmd == NULL)
175 return NULL;
176 #endif
177
178 mmc = calloc(1, sizeof(*mmc));
179 if (mmc == NULL)
180 return NULL;
181
182 mmc->cfg = cfg;
183 mmc->priv = priv;
184
185 /* the following chunk was mmc_register() */
186
187 /* Setup dsr related values */
188 mmc->dsr_imp = 0;
189 mmc->dsr = 0xffffffff;
190 /* Setup the universal parts of the block interface just once */
191 bdesc = mmc_get_blk_desc(mmc);
192 bdesc->if_type = IF_TYPE_MMC;
193 bdesc->removable = 1;
194 bdesc->devnum = mmc_get_next_devnum();
195 bdesc->block_read = mmc_bread;
196 bdesc->block_write = mmc_bwrite;
197 bdesc->block_erase = mmc_berase;
198
199 /* setup initial part type */
200 bdesc->part_type = mmc->cfg->part_type;
201 mmc_list_add(mmc);
202
203 return mmc;
204 }
205
mmc_destroy(struct mmc * mmc)206 void mmc_destroy(struct mmc *mmc)
207 {
208 /* only freeing memory for now */
209 free(mmc);
210 }
211 #endif
212
mmc_select_hwpartp(struct blk_desc * desc,int hwpart)213 static int mmc_select_hwpartp(struct blk_desc *desc, int hwpart)
214 {
215 struct mmc *mmc = find_mmc_device(desc->devnum);
216 int ret;
217
218 if (!mmc)
219 return -ENODEV;
220
221 if (mmc->block_dev.hwpart == hwpart)
222 return 0;
223
224 if (mmc->part_config == MMCPART_NOAVAILABLE)
225 return -EMEDIUMTYPE;
226
227 ret = mmc_switch_part(mmc, hwpart);
228 if (ret)
229 return ret;
230
231 return 0;
232 }
233
mmc_get_dev(int dev,struct blk_desc ** descp)234 static int mmc_get_dev(int dev, struct blk_desc **descp)
235 {
236 struct mmc *mmc = find_mmc_device(dev);
237 int ret;
238
239 if (!mmc)
240 return -ENODEV;
241 ret = mmc_init(mmc);
242 if (ret)
243 return ret;
244
245 *descp = &mmc->block_dev;
246
247 return 0;
248 }
249
250 U_BOOT_LEGACY_BLK(mmc) = {
251 .if_typename = "mmc",
252 .if_type = IF_TYPE_MMC,
253 .max_devs = -1,
254 .get_dev = mmc_get_dev,
255 .select_hwpart = mmc_select_hwpartp,
256 };
257