linux-kernel - [PATCH v5 07/12] mmc: mediatek: add busy

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Date:   Wed, 11 Oct 2017 10:41:31 +0800
From:   Chaotian Jing <chaotian.jing@...iatek.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        yong mao <yong.mao@...iatek.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Phong LE <ple@...libre.com>, <linux-mmc@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>
Subject: [PATCH v5 07/12] mmc: mediatek: add busy_check support

bit7 of PATCH_BIT1 has different meaning in new design, to
compatible with previous platform, clear this bit in new
platform.

Signed-off-by: Chaotian Jing <chaotian.jing@...iatek.com>
---
 drivers/mmc/host/mtk-sd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 8113bac..eceaee8 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -316,6 +316,7 @@ struct mtk_mmc_compatible {
 	u32 pad_tune_reg;
 	bool async_fifo;
 	bool data_tune;
+	bool busy_check;
 };
 
 struct msdc_tune_para {
@@ -380,6 +381,7 @@ struct msdc_host {
 	.pad_tune_reg = MSDC_PAD_TUNE,
 	.async_fifo = false,
 	.data_tune = false,
+	.busy_check = false,
 };
 
 static const struct mtk_mmc_compatible mt8173_compat = {
@@ -388,6 +390,7 @@ struct msdc_host {
 	.pad_tune_reg = MSDC_PAD_TUNE,
 	.async_fifo = false,
 	.data_tune = false,
+	.busy_check = false,
 };
 
 static const struct mtk_mmc_compatible mt2701_compat = {
@@ -396,6 +399,7 @@ struct msdc_host {
 	.pad_tune_reg = MSDC_PAD_TUNE0,
 	.async_fifo = true,
 	.data_tune = true,
+	.busy_check = false,
 };
 
 static const struct mtk_mmc_compatible mt2712_compat = {
@@ -404,6 +408,7 @@ struct msdc_host {
 	.pad_tune_reg = MSDC_PAD_TUNE0,
 	.async_fifo = true,
 	.data_tune = true,
+	.busy_check = true,
 };
 
 static const struct of_device_id msdc_of_ids[] = {
@@ -1275,6 +1280,8 @@ static void msdc_init_hw(struct msdc_host *host)
 	sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
 	writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
 	sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
+	if (host->dev_comp->busy_check)
+		sdr_clr_bits(host->base + MSDC_PATCH_BIT1, (1 << 7));
 	if (host->dev_comp->async_fifo) {
 		sdr_set_field(host->base + MSDC_PATCH_BIT2,
 			      MSDC_PB2_RESPWAIT, 3);
-- 
1.8.1.1.dirty