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 71