linux-kernel - [PATCH V2 2/6] mmc: mmci: add helper functions to define datactrl value for variants

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Date:   Thu, 7 Mar 2019 17:38:58 +0100
From:   Ludovic Barre <ludovic.Barre@...com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     <srinivas.kandagatla@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Ludovic Barre <ludovic.barre@...com>
Subject: [PATCH V2 2/6] mmc: mmci: add helper functions to define datactrl value for variants

From: Ludovic Barre <ludovic.barre@...com>

This patch adds default helper functions to define datactrl value.
Each variant could use these helpers to define datactrl and adds
their specific field.

Signed-off-by: Ludovic Barre <ludovic.barre@...com>
---
 drivers/mmc/host/mmci.c | 25 +++++++++++++++++++++++++
 drivers/mmc/host/mmci.h |  5 +++++
 2 files changed, 30 insertions(+)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 9e6a2c1..28b76c5 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -983,6 +983,31 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
 	mmci_unprep_data(host, data, err);
 }
 
+u32 mmci_dctrl_blksz(struct mmci_host *host)
+{
+	return (ffs(host->data->blksz) - 1) << 4;
+}
+
+u32 mmci_dctrl_dir(struct mmci_host *host)
+{
+	return host->data->flags & MMC_DATA_READ ? MCI_DPSM_DIRECTION : 0;
+}
+
+u32 mmci_dctrl_ddr(struct mmci_host *host)
+{
+	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 ||
+	    host->mmc->ios.timing == MMC_TIMING_MMC_DDR52)
+		return host->variant->datactrl_mask_ddrmode;
+	return 0;
+}
+
+u32 mmci_dctrl_sdio(struct mmci_host *host)
+{
+	if (host->mmc->card && mmc_card_sdio(host->mmc->card))
+		return host->variant->datactrl_mask_sdio;
+	return 0;
+}
+
 static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
 {
 	struct variant_data *variant = host->variant;
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index a59049b..32ae41d 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -430,6 +430,11 @@ struct mmci_host {
 void mmci_write_clkreg(struct mmci_host *host, u32 clk);
 void mmci_write_pwrreg(struct mmci_host *host, u32 pwr);
 
+u32 mmci_dctrl_blksz(struct mmci_host *host);
+u32 mmci_dctrl_dir(struct mmci_host *host);
+u32 mmci_dctrl_ddr(struct mmci_host *host);
+u32 mmci_dctrl_sdio(struct mmci_host *host);
+
 #ifdef CONFIG_DMA_ENGINE
 int mmci_dmae_prep_data(struct mmci_host *host, struct mmc_data *data,
 			bool next);
-- 
2.7.4