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Re: [Qemu-devel] [PATCH v3 03/18] sdcard: fix the 'maximum data transfer
From: |
Alistair Francis |
Subject: |
Re: [Qemu-devel] [PATCH v3 03/18] sdcard: fix the 'maximum data transfer rate' to 25MHz |
Date: |
Wed, 31 Jan 2018 08:17:35 -0800 |
On Mon, Jan 22, 2018 at 7:30 PM, Philippe Mathieu-Daudé <address@hidden> wrote:
> 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 <address@hidden>
Reviewed-by: Alistair Francis <address@hidden>
Alistair
> ---
> 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 f6318c6fdb..56df5b660a 100644
> --- a/hw/sd/sd.c
> +++ b/hw/sd/sd.c
> @@ -356,7 +356,7 @@ static void sd_reset_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;
> --
> 2.15.1
>
>
- [Qemu-devel] [PATCH v3 00/18] SDCard: bugfixes, support UHS-I (part 5), Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 01/18] sdcard: Don't always set the high capacity bit, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 02/18] sdcard: update the CSD CRC register regardless the CSD structure version, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 03/18] sdcard: fix the 'maximum data transfer rate' to 25MHz, Philippe Mathieu-Daudé, 2018/01/22
- Re: [Qemu-devel] [PATCH v3 03/18] sdcard: fix the 'maximum data transfer rate' to 25MHz,
Alistair Francis <=
- [Qemu-devel] [PATCH v3 04/18] sdcard: clean the SCR register and add few comments, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 05/18] sdcard: remove commands from unsupported old MMC specification, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 06/18] sdcard: simplify using the ldst API, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 07/18] sdcard: use the correct masked OCR in the R3 reply, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 08/18] sdcard: use the registerfields API for the CARD_STATUS register masks, Philippe Mathieu-Daudé, 2018/01/22
- [Qemu-devel] [PATCH v3 09/18] sdcard: handles more commands in SPI mode, Philippe Mathieu-Daudé, 2018/01/22