motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

sdhci: add quirk property for card insert interrupt status on Raspberry Pi

Browse source 
This quirk is a workaround for the following hardware behaviour, on
which UEFI (specifically, the bootloader for Windows on Pi2) depends:

1. at boot with an SD card present, the interrupt status/enable
   registers are initially zero
2. upon enabling it in the interrupt enable register, the card insert
   bit in the interrupt status register is immediately set
3. after a subsequent controller reset, the card insert interrupt does
   not fire, even if enabled in the interrupt enable register

Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-id: 1456436130-7048-3-git-send-email-Andrew.Baumann@microsoft.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Baumann 2016-02-25 13:35:30 -08:00 • committed by Peter Maydell
parent 5c1bc9a234
commit 0a7ac9f9e7
2 changed files with 39 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/hw/sd/sdhci.h
View file

@ -76,6 +76,8 @@ typedef struct SDHCIState {
uint32_t buf_maxsz;
uint16_t data_count; /* current element in FIFO buffer */
uint8_t stopped_state;/* Current SDHC state */
bool pending_insert_quirk;/* Quirk for Raspberry Pi card insert int */
bool pending_insert_state;
/* Buffer Data Port Register - virtual access point to R and W buffers */
/* Software Reset Register - always reads as 0 */
/* Force Event Auto CMD12 Error Interrupt Reg - write only */