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