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Since only UHS-I cards respond with S18A set in response to ACMD41, we set the card as ultra-high-speed after successfull initialization. We need to decide whether a card is SDXC based on the C_SIZE field of CSDv2.0 register. According to Physical Layer spec v3.01, the minimum value of C_SIZE for SDXC card is 00FFFFh. Tested by Zhangfei Gao with a Toshiba uhs card and general hs card, on mmp2 in SDMA mode. Signed-off-by: Arindam Nath <arindam.nath@amd.com> Reviewed-by: Philip Rakity <prakity@marvell.com> Tested-by: Philip Rakity <prakity@marvell.com> Acked-by: Zhangfei Gao <zhangfei.gao@marvell.com> Signed-off-by: Chris Ball <cjb@laptop.org>