drivers/mmc/core/core.h

   1 /*
   2  *  linux/drivers/mmc/core/core.h
   3  *
   4  *  Copyright (C) 2003 Russell King, All Rights Reserved.
   5  *  Copyright 2007 Pierre Ossman
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #ifndef _MMC_CORE_CORE_H
  12 #define _MMC_CORE_CORE_H
  13
  14 #include <linux/delay.h>
  15 #include <linux/sched.h>
  16
  17 struct mmc_host;
  18 struct mmc_card;
  19 struct mmc_request;
  20
  21 #define MMC_CMD_RETRIES        3
  22
  23 struct mmc_bus_ops {
  24         void (*remove)(struct mmc_host *);
  25         void (*detect)(struct mmc_host *);
  26         int (*pre_suspend)(struct mmc_host *);
  27         int (*suspend)(struct mmc_host *);
  28         int (*resume)(struct mmc_host *);
  29         int (*runtime_suspend)(struct mmc_host *);
  30         int (*runtime_resume)(struct mmc_host *);
  31         int (*alive)(struct mmc_host *);
  32         int (*shutdown)(struct mmc_host *);
  33         int (*hw_reset)(struct mmc_host *);
  34         int (*sw_reset)(struct mmc_host *);
  35 };
  36
  37 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
  38 void mmc_detach_bus(struct mmc_host *host);
  39
  40 struct device_node *mmc_of_find_child_device(struct mmc_host *host,
  41                 unsigned func_num);
  42
  43 void mmc_init_erase(struct mmc_card *card);
  44
  45 void mmc_set_chip_select(struct mmc_host *host, int mode);
  46 void mmc_set_clock(struct mmc_host *host, unsigned int hz);
  47 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
  48 void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
  49 u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
  50 int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr);
  51 int mmc_host_set_uhs_voltage(struct mmc_host *host);
  52 int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage);
  53 void mmc_set_initial_signal_voltage(struct mmc_host *host);
  54 void mmc_set_timing(struct mmc_host *host, unsigned int timing);
  55 void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);
  56 int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
  57                               int card_drv_type, int *drv_type);
  58 void mmc_power_up(struct mmc_host *host, u32 ocr);
  59 void mmc_power_off(struct mmc_host *host);
  60 void mmc_power_cycle(struct mmc_host *host, u32 ocr);
  61 void mmc_set_initial_state(struct mmc_host *host);
  62
  63 static inline void mmc_delay(unsigned int ms)
  64 {
  65         if (ms <= 20)
  66                 usleep_range(ms * 1000, ms * 1250);
  67         else
  68                 msleep(ms);
  69 }
  70
  71 void mmc_rescan(struct work_struct *work);
  72 void mmc_start_host(struct mmc_host *host);
  73 void mmc_stop_host(struct mmc_host *host);
  74
  75 int _mmc_detect_card_removed(struct mmc_host *host);
  76 int mmc_detect_card_removed(struct mmc_host *host);
  77
  78 int mmc_attach_mmc(struct mmc_host *host);
  79 int mmc_attach_sd(struct mmc_host *host);
  80 int mmc_attach_sdio(struct mmc_host *host);
  81
  82 /* Module parameters */
  83 extern bool use_spi_crc;
  84
  85 /* Debugfs information for hosts and cards */
  86 void mmc_add_host_debugfs(struct mmc_host *host);
  87 void mmc_remove_host_debugfs(struct mmc_host *host);
  88
  89 void mmc_add_card_debugfs(struct mmc_card *card);
  90 void mmc_remove_card_debugfs(struct mmc_card *card);
  91
  92 int mmc_execute_tuning(struct mmc_card *card);
  93 int mmc_hs200_to_hs400(struct mmc_card *card);
  94 int mmc_hs400_to_hs200(struct mmc_card *card);
  95
  96 #ifdef CONFIG_PM_SLEEP
  97 void mmc_register_pm_notifier(struct mmc_host *host);
  98 void mmc_unregister_pm_notifier(struct mmc_host *host);
  99 #else
 100 static inline void mmc_register_pm_notifier(struct mmc_host *host) { }
 101 static inline void mmc_unregister_pm_notifier(struct mmc_host *host) { }
 102 #endif
 103
 104 void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq);
 105 bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq);
 106
 107 int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq);
 108
 109 int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
 110                 unsigned int arg);
 111 int mmc_can_erase(struct mmc_card *card);
 112 int mmc_can_trim(struct mmc_card *card);
 113 int mmc_can_discard(struct mmc_card *card);
 114 int mmc_can_sanitize(struct mmc_card *card);
 115 int mmc_can_secure_erase_trim(struct mmc_card *card);
 116 int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
 117                         unsigned int nr);
 118 unsigned int mmc_calc_max_discard(struct mmc_card *card);
 119
 120 int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
 121 int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
 122                         bool is_rel_write);
 123
 124 int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx,
 125                      atomic_t *abort);
 126 void mmc_release_host(struct mmc_host *host);
 127 void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx);
 128 void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx);
 129
 130 /**
 131  *      mmc_claim_host - exclusively claim a host
 132  *      @host: mmc host to claim
 133  *
 134  *      Claim a host for a set of operations.
 135  */
 136 static inline void mmc_claim_host(struct mmc_host *host)
 137 {
 138         __mmc_claim_host(host, NULL, NULL);
 139 }
 140
 141 int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq);
 142 void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq);
 143 int mmc_cqe_recovery(struct mmc_host *host);
 144
 145 /**
 146  *      mmc_pre_req - Prepare for a new request
 147  *      @host: MMC host to prepare command
 148  *      @mrq: MMC request to prepare for
 149  *
 150  *      mmc_pre_req() is called in prior to mmc_start_req() to let
 151  *      host prepare for the new request. Preparation of a request may be
 152  *      performed while another request is running on the host.
 153  */
 154 static inline void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq)
 155 {
 156         if (host->ops->pre_req)
 157                 host->ops->pre_req(host, mrq);
 158 }
 159
 160 /**
 161  *      mmc_post_req - Post process a completed request
 162  *      @host: MMC host to post process command
 163  *      @mrq: MMC request to post process for
 164  *      @err: Error, if non zero, clean up any resources made in pre_req
 165  *
 166  *      Let the host post process a completed request. Post processing of
 167  *      a request may be performed while another request is running.
 168  */
 169 static inline void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
 170                                 int err)
 171 {
 172         if (host->ops->post_req)
 173                 host->ops->post_req(host, mrq, err);
 174 }
 175
 176 #endif