From f31e8f1318384a680db7280f999c01ae3ef9591c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Tue, 1 Sep 2020 14:21:50 +0200 Subject: [PATCH] aspeed/sdhci: Fix reset sequence MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit BIT(0) of the ASPEED_SDHCI_INFO register is set by SW and polled until the bit is cleared by HW. Use the number of supported slots to define the default value of this register (The AST2600 eMMC Controller only has one). Fix the reset sequence by clearing automatically the RESET bit. Cc: Eddie James Fixes: 2bea128c3d0b ("hw/sd/aspeed_sdhci: New device") Reviewed-by: Joel Stanley Message-Id: <20200819100956.2216690-9-clg@kaod.org> Signed-off-by: Cédric Le Goater --- hw/sd/aspeed_sdhci.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/sd/aspeed_sdhci.c b/hw/sd/aspeed_sdhci.c index 22cafce0fb..4f24b7d2f9 100644 --- a/hw/sd/aspeed_sdhci.c +++ b/hw/sd/aspeed_sdhci.c @@ -16,7 +16,9 @@ #include "hw/qdev-properties.h" #define ASPEED_SDHCI_INFO 0x00 -#define ASPEED_SDHCI_INFO_RESET 0x00030000 +#define ASPEED_SDHCI_INFO_SLOT1 (1 << 17) +#define ASPEED_SDHCI_INFO_SLOT0 (1 << 16) +#define ASPEED_SDHCI_INFO_RESET (1 << 0) #define ASPEED_SDHCI_DEBOUNCE 0x04 #define ASPEED_SDHCI_DEBOUNCE_RESET 0x00000005 #define ASPEED_SDHCI_BUS 0x08 @@ -67,6 +69,10 @@ static void aspeed_sdhci_write(void *opaque, hwaddr addr, uint64_t val, AspeedSDHCIState *sdhci = opaque; switch (addr) { + case ASPEED_SDHCI_INFO: + /* The RESET bit automatically clears. */ + sdhci->regs[TO_REG(addr)] = (uint32_t)val & ~ASPEED_SDHCI_INFO_RESET; + break; case ASPEED_SDHCI_SDIO_140: sdhci->slots[0].capareg = (uint64_t)(uint32_t)val; break; @@ -155,7 +161,11 @@ static void aspeed_sdhci_reset(DeviceState *dev) AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev); memset(sdhci->regs, 0, ASPEED_SDHCI_REG_SIZE); - sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] = ASPEED_SDHCI_INFO_RESET; + + sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] = ASPEED_SDHCI_INFO_SLOT0; + if (sdhci->num_slots == 2) { + sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] |= ASPEED_SDHCI_INFO_SLOT1; + } sdhci->regs[TO_REG(ASPEED_SDHCI_DEBOUNCE)] = ASPEED_SDHCI_DEBOUNCE_RESET; }