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mmc: deprecate mmc bus topology

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The classic MMC bus was defined as multi card bus
system, which is reflected in the design in the MMC
layer.

When SD showed up, the bus topology was abandoned
and a star topology (one card per host) was mandated.
MMC version 4 has followed this, officially deprecating
the bus topology.

As we do not have any known users of the bus
topology we can remove support for it. This will
simplify the code and rectify some incorrect
assumptions in the newer additions.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman
2007-01-03 19:47:29 +01:00
parent b5af25bee2
commit b855885e3b
5 changed files with 438 additions and 593 deletions
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4
include/linux/mmc/host.h
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@@ -138,14 +138,12 @@ struct mmc_host {
#define MMC_MODE_MMC 0
#define MMC_MODE_SD 1
struct list_head cards; /* devices attached to this host */
struct mmc_card *card; /* device attached to this host */
wait_queue_head_t wq;
spinlock_t lock; /* claimed lock */
unsigned int claimed:1; /* host exclusively claimed */
struct mmc_card *card_selected; /* the selected MMC card */
struct delayed_work detect;
#ifdef CONFIG_MMC_DEBUG
unsigned int removed:1; /* host is being removed */