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
  16 #define MMC_CMD_RETRIES        3
  17
  18 struct mmc_bus_ops {
  19         void (*remove)(struct mmc_host *);
  20         void (*detect)(struct mmc_host *);
  21         int (*sysfs_add)(struct mmc_host *, struct mmc_card *card);
  22         void (*sysfs_remove)(struct mmc_host *, struct mmc_card *card);
  23         void (*suspend)(struct mmc_host *);
  24         void (*resume)(struct mmc_host *);
  25 };
  26
  27 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
  28 void mmc_detach_bus(struct mmc_host *host);
  29
  30 void __mmc_release_bus(struct mmc_host *host);
  31
  32 static inline void mmc_bus_get(struct mmc_host *host)
  33 {
  34         unsigned long flags;
  35
  36         spin_lock_irqsave(&host->lock, flags);
  37         host->bus_refs++;
  38         spin_unlock_irqrestore(&host->lock, flags);
  39 }
  40
  41 static inline void mmc_bus_put(struct mmc_host *host)
  42 {
  43         unsigned long flags;
  44
  45         spin_lock_irqsave(&host->lock, flags);
  46         host->bus_refs--;
  47         if ((host->bus_refs == 0) && host->bus_ops)
  48                 __mmc_release_bus(host);
  49         spin_unlock_irqrestore(&host->lock, flags);
  50 }
  51
  52 void mmc_set_chip_select(struct mmc_host *host, int mode);
  53 void mmc_set_clock(struct mmc_host *host, unsigned int hz);
  54 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
  55 void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
  56 u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
  57 void mmc_set_timing(struct mmc_host *host, unsigned int timing);
  58
  59 static inline void mmc_delay(unsigned int ms)
  60 {
  61         if (ms < 1000 / HZ) {
  62                 cond_resched();
  63                 mdelay(ms);
  64         } else {
  65                 msleep(ms);
  66         }
  67 }
  68
  69 #endif
  70