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         void (*suspend)(struct mmc_host *);
  22         void (*resume)(struct mmc_host *);
  23 };
  24
  25 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
  26 void mmc_detach_bus(struct mmc_host *host);
  27
  28 void __mmc_release_bus(struct mmc_host *host);
  29
  30 static inline void mmc_bus_get(struct mmc_host *host)
  31 {
  32         unsigned long flags;
  33
  34         spin_lock_irqsave(&host->lock, flags);
  35         host->bus_refs++;
  36         spin_unlock_irqrestore(&host->lock, flags);
  37 }
  38
  39 static inline void mmc_bus_put(struct mmc_host *host)
  40 {
  41         unsigned long flags;
  42
  43         spin_lock_irqsave(&host->lock, flags);
  44         host->bus_refs--;
  45         if ((host->bus_refs == 0) && host->bus_ops)
  46                 __mmc_release_bus(host);
  47         spin_unlock_irqrestore(&host->lock, flags);
  48 }
  49
  50 void mmc_set_chip_select(struct mmc_host *host, int mode);
  51 void mmc_set_clock(struct mmc_host *host, unsigned int hz);
  52 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
  53 void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
  54 u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
  55 void mmc_set_timing(struct mmc_host *host, unsigned int timing);
  56
  57 struct mmc_card *mmc_alloc_card(struct mmc_host *host);
  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