From 3b2d81766fd9c957a9fcfe997ff3d692e9981c98 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 16 Jun 2020 10:32:29 +0100 Subject: sd: sdhci: Implement basic vendor specific register support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Linux kernel's IMX code now uses vendor specific commands. This results in endless warnings when booting the Linux kernel. sdhci-esdhc-imx 2194000.usdhc: esdhc_wait_for_card_clock_gate_off: card clock still not gate off in 100us!. Implement support for the vendor specific command implemented in IMX hardware to be able to avoid this warning. Reviewed-by: Philippe Mathieu-Daudé Tested-by: Philippe Mathieu-Daudé Signed-off-by: Guenter Roeck Message-id: 20200603145258.195920-2-linux@roeck-us.net Signed-off-by: Peter Maydell --- hw/sd/sdhci.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'hw/sd/sdhci.c') diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c index 1b75d7bab9..eb2be6529e 100644 --- a/hw/sd/sdhci.c +++ b/hw/sd/sdhci.c @@ -1569,11 +1569,13 @@ static uint64_t usdhc_read(void *opaque, hwaddr offset, unsigned size) } break; + case ESDHC_VENDOR_SPEC: + ret = s->vendor_spec; + break; case ESDHC_DLL_CTRL: case ESDHC_TUNE_CTRL_STATUS: case ESDHC_UNDOCUMENTED_REG27: case ESDHC_TUNING_CTRL: - case ESDHC_VENDOR_SPEC: case ESDHC_MIX_CTRL: case ESDHC_WTMK_LVL: ret = 0; @@ -1596,7 +1598,21 @@ usdhc_write(void *opaque, hwaddr offset, uint64_t val, unsigned size) case ESDHC_UNDOCUMENTED_REG27: case ESDHC_TUNING_CTRL: case ESDHC_WTMK_LVL: + break; + case ESDHC_VENDOR_SPEC: + s->vendor_spec = value; + switch (s->vendor) { + case SDHCI_VENDOR_IMX: + if (value & ESDHC_IMX_FRC_SDCLK_ON) { + s->prnsts &= ~SDHC_IMX_CLOCK_GATE_OFF; + } else { + s->prnsts |= SDHC_IMX_CLOCK_GATE_OFF; + } + break; + default: + break; + } break; case SDHC_HOSTCTL: -- cgit 1.4.1