From d7ecb8675298fefdaea35f6d7a558e91ec0b4138 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Thu, 22 Feb 2018 15:12:53 +0000 Subject: [PATCH] sdcard: fix the 'maximum data transfer rate' to 25MHz MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To comply with Spec v1.10 (and 2.00, 3.01): . TRAN_SPEED for current SD Memory Cards that field must be always 0_0110_010b (032h) which is equal to 25MHz - the mandatory maximum operating frequency of SD Memory Card. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Alistair Francis Message-id: 20180215221325.7611-4-f4bug@amsat.org [PMM: fixed comment indent] Signed-off-by: Peter Maydell --- hw/sd/sd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/sd/sd.c b/hw/sd/sd.c index 110f2f1d0a..3526269dbe 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -357,7 +357,7 @@ static void sd_set_csd(SDState *sd, uint64_t size) sd->csd[0] = 0x00; /* CSD structure */ sd->csd[1] = 0x26; /* Data read access-time-1 */ sd->csd[2] = 0x00; /* Data read access-time-2 */ - sd->csd[3] = 0x5a; /* Max. data transfer rate */ + sd->csd[3] = 0x32; /* Max. data transfer rate: 25 MHz */ sd->csd[4] = 0x5f; /* Card Command Classes */ sd->csd[5] = 0x50 | /* Max. read data block length */ HWBLOCK_SHIFT;