mtd: flash mapping support for Dreamcast VMU. (47a72688) · Commits · 戴 / test

This patch adds support for the Sega Dreamcast visual memory unit as a flash mapping. It requires changes in the maple bus driver (posted separately) to support block reads and writes. The VMU is a 'smart' flash device, with a built-in 8-bit controller - for instance there is an erase before a write but it is hidden from the user. But the device's overall behaviour means it works well with the mtd layer and it is appropriate to add it as an mtd mapping. Signed-off-by:

Adrian McMenamin <adrian@mcmen.demon.co.uk> Acked-By:

David Woodhouse <David.Woodhouse@intel.com> Signed-off-by:

Paul Mundt <lethal@linux-sh.org>

drivers/mtd/maps/Kconfig

+11 −1

Original line number	Diff line number	Diff line
		@@ -551,5 +551,15 @@ config MTD_PLATRAM

		This selection automatically selects the map_ram driver.

		endmenu
		config MTD_VMU
		tristate "Map driver for Dreamcast VMU"
		depends on MAPLE
		help
		This driver enables access to the Dreamcast Visual Memory Unit (VMU).

		Most Dreamcast users will want to say Y here.

		To build this as a module select M here, the module will be called
		vmu-flash.

		endmenu

drivers/mtd/maps/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -61,3 +61,4 @@ obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o
		obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
		obj-$(CONFIG_MTD_INTEL_VR_NOR) += intel_vr_nor.o
		obj-$(CONFIG_MTD_BFIN_ASYNC) += bfin-async-flash.o
		obj-$(CONFIG_MTD_VMU) += vmu-flash.o

drivers/mtd/maps/vmu-flash.c

0 → 100644

+832 −0

File added.

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