From b66f73a0cb312c81470433dfd5275d2824bb89de Mon Sep 17 00:00:00 2001 From: Frank Chang Date: Tue, 28 Dec 2021 20:57:17 +0800 Subject: [PATCH] hw/sd: Add SDHC support for SD card SPI-mode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In SPI-mode, SD card's OCR register: Card Capacity Status (CCS) bit is not set to 1 correclty when the assigned SD image size is larger than 2GB (SDHC). This will cause the SD card to be indentified as SDSC incorrectly. CCS bit should be set to 1 if we are using SDHC. Also, as there's no power up emulation in SPI-mode. The OCR register: Card power up status bit bit (busy) should also be set to 1 when reset. (busy bit is set to LOW if the card has not finished the power up routine.) Signed-off-by: Frank Chang Reviewed-by: Jim Shu Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20211228125719.14712-1-frank.chang@sifive.com> Signed-off-by: Philippe Mathieu-Daudé --- hw/sd/sd.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/hw/sd/sd.c b/hw/sd/sd.c index c10a1e469b..cd67a7bac8 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -290,12 +290,6 @@ FIELD(OCR, CARD_POWER_UP, 31, 1) | R_OCR_CARD_CAPACITY_MASK \ | R_OCR_CARD_POWER_UP_MASK) -static void sd_set_ocr(SDState *sd) -{ - /* All voltages OK */ - sd->ocr = R_OCR_VDD_VOLTAGE_WIN_HI_MASK; -} - static void sd_ocr_powerup(void *opaque) { SDState *sd = opaque; @@ -311,6 +305,22 @@ static void sd_ocr_powerup(void *opaque) } } +static void sd_set_ocr(SDState *sd) +{ + /* All voltages OK */ + sd->ocr = R_OCR_VDD_VOLTAGE_WIN_HI_MASK; + + if (sd->spi) { + /* + * We don't need to emulate power up sequence in SPI-mode. + * Thus, the card's power up status bit should be set to 1 when reset. + * The card's capacity status bit should also be set if SD card size + * is larger than 2GB for SDHC support. + */ + sd_ocr_powerup(sd); + } +} + static void sd_set_scr(SDState *sd) { sd->scr[0] = 0 << 4; /* SCR structure version 1.0 */ @@ -560,6 +570,7 @@ static void sd_reset(DeviceState *dev) sd->state = sd_idle_state; sd->rca = 0x0000; + sd->size = size; sd_set_ocr(sd); sd_set_scr(sd); sd_set_cid(sd); @@ -574,7 +585,6 @@ static void sd_reset(DeviceState *dev) memset(sd->function_group, 0, sizeof(sd->function_group)); sd->erase_start = INVALID_ADDRESS; sd->erase_end = INVALID_ADDRESS; - sd->size = size; sd->blk_len = 0x200; sd->pwd_len = 0; sd->expecting_acmd = false;