![Pierre Ossman](/assets/img/avatar_default.png)
Modern SD cards support a clock speed of 50 MHz. Make sure we test for this capability and do the song and dance required to activate it. Activating high speed support actually modifies the TRAN_SPEED field of the CSD. But as the spec says that the cards must report 50 MHz, we might as well skip re-reading the CSD. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/*
|
|
* linux/include/linux/mmc/card.h
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Card driver specific definitions.
|
|
*/
|
|
#ifndef LINUX_MMC_CARD_H
|
|
#define LINUX_MMC_CARD_H
|
|
|
|
#include <linux/mmc/mmc.h>
|
|
|
|
struct mmc_cid {
|
|
unsigned int manfid;
|
|
char prod_name[8];
|
|
unsigned int serial;
|
|
unsigned short oemid;
|
|
unsigned short year;
|
|
unsigned char hwrev;
|
|
unsigned char fwrev;
|
|
unsigned char month;
|
|
};
|
|
|
|
struct mmc_csd {
|
|
unsigned char mmca_vsn;
|
|
unsigned short cmdclass;
|
|
unsigned short tacc_clks;
|
|
unsigned int tacc_ns;
|
|
unsigned int r2w_factor;
|
|
unsigned int max_dtr;
|
|
unsigned int read_blkbits;
|
|
unsigned int write_blkbits;
|
|
unsigned int capacity;
|
|
unsigned int read_partial:1,
|
|
read_misalign:1,
|
|
write_partial:1,
|
|
write_misalign:1;
|
|
};
|
|
|
|
struct mmc_ext_csd {
|
|
unsigned int hs_max_dtr;
|
|
};
|
|
|
|
struct sd_scr {
|
|
unsigned char sda_vsn;
|
|
unsigned char bus_widths;
|
|
#define SD_SCR_BUS_WIDTH_1 (1<<0)
|
|
#define SD_SCR_BUS_WIDTH_4 (1<<2)
|
|
};
|
|
|
|
struct sd_switch_caps {
|
|
unsigned int hs_max_dtr;
|
|
};
|
|
|
|
struct mmc_host;
|
|
|
|
/*
|
|
* MMC device
|
|
*/
|
|
struct mmc_card {
|
|
struct list_head node; /* node in hosts devices list */
|
|
struct mmc_host *host; /* the host this device belongs to */
|
|
struct device dev; /* the device */
|
|
unsigned int rca; /* relative card address of device */
|
|
unsigned int state; /* (our) card state */
|
|
#define MMC_STATE_PRESENT (1<<0) /* present in sysfs */
|
|
#define MMC_STATE_DEAD (1<<1) /* device no longer in stack */
|
|
#define MMC_STATE_BAD (1<<2) /* unrecognised device */
|
|
#define MMC_STATE_SDCARD (1<<3) /* is an SD card */
|
|
#define MMC_STATE_READONLY (1<<4) /* card is read-only */
|
|
#define MMC_STATE_HIGHSPEED (1<<5) /* card is in high speed mode */
|
|
u32 raw_cid[4]; /* raw card CID */
|
|
u32 raw_csd[4]; /* raw card CSD */
|
|
u32 raw_scr[2]; /* raw card SCR */
|
|
struct mmc_cid cid; /* card identification */
|
|
struct mmc_csd csd; /* card specific */
|
|
struct mmc_ext_csd ext_csd; /* mmc v4 extended card specific */
|
|
struct sd_scr scr; /* extra SD information */
|
|
struct sd_switch_caps sw_caps; /* switch (CMD6) caps */
|
|
};
|
|
|
|
#define mmc_card_present(c) ((c)->state & MMC_STATE_PRESENT)
|
|
#define mmc_card_dead(c) ((c)->state & MMC_STATE_DEAD)
|
|
#define mmc_card_bad(c) ((c)->state & MMC_STATE_BAD)
|
|
#define mmc_card_sd(c) ((c)->state & MMC_STATE_SDCARD)
|
|
#define mmc_card_readonly(c) ((c)->state & MMC_STATE_READONLY)
|
|
#define mmc_card_highspeed(c) ((c)->state & MMC_STATE_HIGHSPEED)
|
|
|
|
#define mmc_card_set_present(c) ((c)->state |= MMC_STATE_PRESENT)
|
|
#define mmc_card_set_dead(c) ((c)->state |= MMC_STATE_DEAD)
|
|
#define mmc_card_set_bad(c) ((c)->state |= MMC_STATE_BAD)
|
|
#define mmc_card_set_sd(c) ((c)->state |= MMC_STATE_SDCARD)
|
|
#define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
|
|
#define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED)
|
|
|
|
#define mmc_card_name(c) ((c)->cid.prod_name)
|
|
#define mmc_card_id(c) ((c)->dev.bus_id)
|
|
|
|
#define mmc_list_to_card(l) container_of(l, struct mmc_card, node)
|
|
#define mmc_get_drvdata(c) dev_get_drvdata(&(c)->dev)
|
|
#define mmc_set_drvdata(c,d) dev_set_drvdata(&(c)->dev, d)
|
|
|
|
/*
|
|
* MMC device driver (e.g., Flash card, I/O card...)
|
|
*/
|
|
struct mmc_driver {
|
|
struct device_driver drv;
|
|
int (*probe)(struct mmc_card *);
|
|
void (*remove)(struct mmc_card *);
|
|
int (*suspend)(struct mmc_card *, pm_message_t);
|
|
int (*resume)(struct mmc_card *);
|
|
};
|
|
|
|
extern int mmc_register_driver(struct mmc_driver *);
|
|
extern void mmc_unregister_driver(struct mmc_driver *);
|
|
|
|
static inline int mmc_card_claim_host(struct mmc_card *card)
|
|
{
|
|
return __mmc_claim_host(card->host, card);
|
|
}
|
|
|
|
#define mmc_card_release_host(c) mmc_release_host((c)->host)
|
|
|
|
#endif
|