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