On Tue, May 06, 2014 at 12:46:18AM +0530, pekon gupta wrote:
From: David Mosberger davidm@egauge.net
As per following Sections in ONFI Spec, GET_FEATURES and SET_FEATURES also need byte-addressing on 16-bit devices.
*Section: Target Initialization" "The Read ID and Read Parameter Page commands only use the lower 8-bits of the data bus. The host shall not issue commands that use a word data width on x16 devices until the host determines the device supports a 16-bit data bus width in the parameter page."
*Section: Bus Width Requirements* "When the host supports a 16-bit bus width, only data is transferred at the 16-bit width. All address and command line transfers shall use only the lower 8-bits of the data bus. During command transfers, the host may place any value on the upper 8-bits of the data bus. During address transfers, the host shall set the upper 8-bits of the data bus to 00h."
So porting following commit from linux kernel commit e34fcb07a6d57411de6e15a47724fbe92c5caa42 Author: David Mosberger davidm@egauge.net (preserving authorship) mtd: nand: fix GET/SET_FEATURES address on 16-bit devices
Signed-off-by: Pekon Gupta pekon@ti.com
Applied to u-boot-ti/master, thanks!