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Code Issues Releases Activity

Propigate read-only status of cards. Right now it is read only at

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device attach time.  We may need to read this more often in the
future, but for now simplicity of implementation wins.

Submitted by:	mav@
This commit is contained in:
Warner Losh 2008-09-28 22:40:11 +00:00
parent 8aaa15e202
commit 40fab6e7c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=183447
3 changed files with 14 additions and 1 deletions
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7
sys/dev/mmc/mmc.c
View File

@ -86,6 +86,7 @@ struct mmc_ivars {
enum mmc_card_mode mode;
struct mmc_cid cid; /* cid decoded */
struct mmc_csd csd; /* csd decoded */
u_char read_only; /* True when the device is read-only */
};
#define CMD_RETRIES 3
@ -613,7 +614,8 @@ mmc_discover_cards(struct mmc_softc *sc)
mmc_decode_cid(1, ivar->raw_cid, &ivar->cid);
mmc_send_relative_addr(sc, &resp);
ivar->rca = resp >> 16;
// RO check
if (mmcbr_get_ro(sc->dev))
ivar->read_only = 1;
mmc_send_csd(sc, ivar->rca, ivar->raw_csd);
mmc_decode_csd(1, ivar->raw_csd, &ivar->csd);
printf("SD CARD: %lld bytes\n", (long long)
@ -738,6 +740,9 @@ mmc_read_ivar(device_t bus, device_t child, int which, u_char *result)
case MMC_IVAR_TRAN_SPEED:
*(int *)result = ivar->csd.tran_speed;
break;
case MMC_IVAR_READ_ONLY:
*(int *)result = ivar->read_only;
break;
}
return (0);
}

6
sys/dev/mmc/mmcbrvar.h
View File

@ -97,4 +97,10 @@ mmcbr_update_ios(device_t dev)
return (MMCBR_UPDATE_IOS(device_get_parent(dev), dev));
}
static int __inline
mmcbr_get_ro(device_t dev)
{
return (MMCBR_GET_RO(device_get_parent(dev), dev));
}
#endif /* DEV_MMC_MMCBRVAR_H */

2
sys/dev/mmc/mmcvar.h
View File

@ -61,6 +61,7 @@ enum mmc_device_ivars {
MMC_IVAR_RCA,
MMC_IVAR_SECTOR_SIZE,
MMC_IVAR_TRAN_SPEED,
MMC_IVAR_READ_ONLY,
// MMC_IVAR_,
};
@ -75,5 +76,6 @@ MMC_ACCESSOR(media_size, MEDIA_SIZE, int)
MMC_ACCESSOR(rca, RCA, int)
MMC_ACCESSOR(sector_size, SECTOR_SIZE, int)
MMC_ACCESSOR(tran_speed, TRAN_SPEED, int)
MMC_ACCESSOR(read_only, READ_ONLY, int)
#endif /* DEV_MMC_MMCVAR_H */