1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/drivers/mmc/core/core.h 4 * 5 * Copyright (C) 2003 Russell King, All Rights Reserved. 6 * Copyright 2007 Pierre Ossman 7 */ 8 #ifndef _MMC_CORE_CORE_H 9 #define _MMC_CORE_CORE_H 10 11 #include <linux/delay.h> 12 #include <linux/sched.h> 13 14 struct mmc_host; 15 struct mmc_card; 16 struct mmc_request; 17 18 #define MMC_CMD_RETRIES 3 19 20 struct mmc_bus_ops { 21 void (*remove)(struct mmc_host *); 22 void (*detect)(struct mmc_host *); 23 int (*pre_suspend)(struct mmc_host *); 24 int (*suspend)(struct mmc_host *); 25 int (*resume)(struct mmc_host *); 26 int (*runtime_suspend)(struct mmc_host *); 27 int (*runtime_resume)(struct mmc_host *); 28 int (*alive)(struct mmc_host *); 29 int (*shutdown)(struct mmc_host *); 30 int (*hw_reset)(struct mmc_host *); 31 int (*sw_reset)(struct mmc_host *); 32 }; 33 34 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops); 35 void mmc_detach_bus(struct mmc_host *host); 36 37 struct device_node *mmc_of_find_child_device(struct mmc_host *host, 38 unsigned func_num); 39 40 void mmc_init_erase(struct mmc_card *card); 41 42 void mmc_set_chip_select(struct mmc_host *host, int mode); 43 void mmc_set_clock(struct mmc_host *host, unsigned int hz); 44 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode); 45 void mmc_set_bus_width(struct mmc_host *host, unsigned int width); 46 u32 mmc_select_voltage(struct mmc_host *host, u32 ocr); 47 int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr); 48 int mmc_host_set_uhs_voltage(struct mmc_host *host); 49 int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage); 50 void mmc_set_initial_signal_voltage(struct mmc_host *host); 51 void mmc_set_timing(struct mmc_host *host, unsigned int timing); 52 void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type); 53 int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, 54 int card_drv_type, int *drv_type); 55 void mmc_power_up(struct mmc_host *host, u32 ocr); 56 void mmc_power_off(struct mmc_host *host); 57 void mmc_power_cycle(struct mmc_host *host, u32 ocr); 58 void mmc_set_initial_state(struct mmc_host *host); 59 u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max); 60 61 static inline void mmc_delay(unsigned int ms) 62 { 63 if (ms <= 20) 64 usleep_range(ms * 1000, ms * 1250); 65 else 66 msleep(ms); 67 } 68 69 void mmc_rescan(struct work_struct *work); 70 void mmc_start_host(struct mmc_host *host); 71 void mmc_stop_host(struct mmc_host *host); 72 73 int _mmc_detect_card_removed(struct mmc_host *host); 74 int mmc_detect_card_removed(struct mmc_host *host); 75 76 int mmc_attach_mmc(struct mmc_host *host); 77 int mmc_attach_sd(struct mmc_host *host); 78 int mmc_attach_sdio(struct mmc_host *host); 79 80 /* Module parameters */ 81 extern bool use_spi_crc; 82 83 /* Debugfs information for hosts and cards */ 84 void mmc_add_host_debugfs(struct mmc_host *host); 85 void mmc_remove_host_debugfs(struct mmc_host *host); 86 87 void mmc_add_card_debugfs(struct mmc_card *card); 88 void mmc_remove_card_debugfs(struct mmc_card *card); 89 90 int mmc_execute_tuning(struct mmc_card *card); 91 int mmc_hs200_to_hs400(struct mmc_card *card); 92 int mmc_hs400_to_hs200(struct mmc_card *card); 93 94 #ifdef CONFIG_PM_SLEEP 95 void mmc_register_pm_notifier(struct mmc_host *host); 96 void mmc_unregister_pm_notifier(struct mmc_host *host); 97 #else 98 static inline void mmc_register_pm_notifier(struct mmc_host *host) { } 99 static inline void mmc_unregister_pm_notifier(struct mmc_host *host) { } 100 #endif 101 102 void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq); 103 bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq); 104 105 int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq); 106 107 int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, 108 unsigned int arg); 109 int mmc_can_erase(struct mmc_card *card); 110 int mmc_can_trim(struct mmc_card *card); 111 int mmc_can_discard(struct mmc_card *card); 112 int mmc_can_sanitize(struct mmc_card *card); 113 int mmc_can_secure_erase_trim(struct mmc_card *card); 114 int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, 115 unsigned int nr); 116 unsigned int mmc_calc_max_discard(struct mmc_card *card); 117 118 int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen); 119 120 int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx, 121 atomic_t *abort); 122 void mmc_release_host(struct mmc_host *host); 123 void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx); 124 void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx); 125 126 /** 127 * mmc_claim_host - exclusively claim a host 128 * @host: mmc host to claim 129 * 130 * Claim a host for a set of operations. 131 */ 132 static inline void mmc_claim_host(struct mmc_host *host) 133 { 134 __mmc_claim_host(host, NULL, NULL); 135 } 136 137 int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq); 138 void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq); 139 int mmc_cqe_recovery(struct mmc_host *host); 140 141 /** 142 * mmc_pre_req - Prepare for a new request 143 * @host: MMC host to prepare command 144 * @mrq: MMC request to prepare for 145 * 146 * mmc_pre_req() is called in prior to mmc_start_req() to let 147 * host prepare for the new request. Preparation of a request may be 148 * performed while another request is running on the host. 149 */ 150 static inline void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq) 151 { 152 if (host->ops->pre_req) 153 host->ops->pre_req(host, mrq); 154 } 155 156 /** 157 * mmc_post_req - Post process a completed request 158 * @host: MMC host to post process command 159 * @mrq: MMC request to post process for 160 * @err: Error, if non zero, clean up any resources made in pre_req 161 * 162 * Let the host post process a completed request. Post processing of 163 * a request may be performed while another request is running. 164 */ 165 static inline void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, 166 int err) 167 { 168 if (host->ops->post_req) 169 host->ops->post_req(host, mrq, err); 170 } 171 172 #endif 173