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 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 #endif 74 75