From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhou Yanjie Subject: [PATCH 1/6 v2] MMC: Ingenic: Add 8bit mode support. Date: Sat, 12 Oct 2019 13:13:15 +0800 Message-ID: <1570857203-49192-2-git-send-email-zhouyanjie@zoho.com> References: <1567669089-88693-1-git-send-email-zhouyanjie@zoho.com> <1570857203-49192-1-git-send-email-zhouyanjie@zoho.com> Return-path: In-Reply-To: <1570857203-49192-1-git-send-email-zhouyanjie@zoho.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, paul.burton@mips.com, mark.rutland@arm.com, syq@debian.org, ulf.hansson@linaro.org, linus.walleij@linaro.org, armijn@tjaldur.nl, tglx@linutronix.de, yuehaibing@huawei.com, malat@debian.org, ezequiel@collabora.com, paul@crapouillou.net List-Id: devicetree@vger.kernel.org Add support for 8bit mode, now supports 1bit/4bit/8bit modes. Signed-off-by: Zhou Yanjie --- drivers/mmc/host/jz4740_mmc.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c index ffdbfaa..69c4a8b 100644 --- a/drivers/mmc/host/jz4740_mmc.c +++ b/drivers/mmc/host/jz4740_mmc.c @@ -79,6 +79,8 @@ #define JZ_MMC_CMDAT_IO_ABORT BIT(11) #define JZ_MMC_CMDAT_BUS_WIDTH_4BIT BIT(10) +#define JZ_MMC_CMDAT_BUS_WIDTH_8BIT (BIT(10) | BIT(9)) +#define JZ_MMC_CMDAT_BUS_WIDTH_MASK (BIT(10) | BIT(9)) #define JZ_MMC_CMDAT_DMA_EN BIT(8) #define JZ_MMC_CMDAT_INIT BIT(7) #define JZ_MMC_CMDAT_BUSY BIT(6) @@ -899,11 +901,16 @@ static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) switch (ios->bus_width) { case MMC_BUS_WIDTH_1: - host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_4BIT; + host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK; break; case MMC_BUS_WIDTH_4: + host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK; host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_4BIT; break; + case MMC_BUS_WIDTH_8: + host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK; + host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_8BIT; + break; default: break; } @@ -1034,7 +1041,8 @@ static int jz4740_mmc_probe(struct platform_device* pdev) dev_info(&pdev->dev, "Using %s, %d-bit mode\n", host->use_dma ? "DMA" : "PIO", - (mmc->caps & MMC_CAP_4_BIT_DATA) ? 4 : 1); + (mmc->caps & MMC_CAP_8_BIT_DATA) ? 8 : + ((mmc->caps & MMC_CAP_4_BIT_DATA) ? 4 : 1)); return 0; -- 2.7.4