linux-kernel - [PATCH 11/47] mtd: nand: stm_nand_bch: initialise the Hamming Controller

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Date:	Thu,  1 May 2014 10:56:18 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	computersforpeace@...il.com, linux-mtd@...ts.infradead.org,
	kernel@...inux.com, Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 11/47] mtd: nand: stm_nand_bch: initialise the Hamming Controller

Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mtd/nand/stm_nand_bch.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 19d090c..0c6aad2 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -365,6 +365,41 @@ static struct clk *nandi_clk_setup(struct nandi_controller *nandi,
 	return clk;
 }
 
+static void nandi_init_hamming(struct nandi_controller *nandi, int emi_bank)
+{
+	dev_dbg(nandi->dev, "%s\n", __func__);
+
+	emiss_nandi_select(STM_NANDI_HAMMING);
+
+	/* Reset and disable boot-mode controller */
+	writel(BOOT_CFG_RESET, nandi->base + NANDHAM_BOOTBANK_CFG);
+	udelay(1);
+	writel(0x00000000, nandi->base + NANDHAM_BOOTBANK_CFG);
+
+	/* Reset controller */
+	writel(CFG_RESET, nandi->base + NANDHAM_FLEXMODE_CFG);
+	udelay(1);
+	writel(0x00000000, nandi->base + NANDHAM_FLEXMODE_CFG);
+
+	/* Set EMI Bank */
+	writel(0x1 << emi_bank, nandi->base + NANDHAM_FLEX_MUXCTRL);
+
+	/* Enable FLEX mode */
+	writel(CFG_ENABLE_FLEX, nandi->base + NANDHAM_FLEXMODE_CFG);
+
+	/* Configure FLEX_DATA_READ/WRITE for 1-byte access */
+	writel(FLEX_DATA_CFG_BEATS_1 | FLEX_DATA_CFG_CSN,
+	       nandi->base + NANDHAM_FLEX_DATAREAD_CONFIG);
+	writel(FLEX_DATA_CFG_BEATS_1 | FLEX_DATA_CFG_CSN,
+	       nandi->base + NANDHAM_FLEX_DATAREAD_CONFIG);
+
+	/* RBn interrupt on rising edge */
+	writel(NAND_EDGE_CFG_RBN_RISING, nandi->base + NANDHAM_INT_EDGE_CFG);
+
+	/* Enable interrupts */
+	nandi_enable_interrupts(nandi, NAND_INT_ENABLE);
+}
+
 static void nandi_init_bch(struct nandi_controller *nandi, int emi_bank)
 {
 	dev_dbg(nandi->dev, "%s\n", __func__);
@@ -413,6 +448,7 @@ static void nandi_init_controller(struct nandi_controller *nandi,
 				  int emi_bank)
 {
 	nandi_init_bch(nandi, emi_bank);
+	nandi_init_hamming(nandi, emi_bank);
 }
 
 static int remap_named_resource(struct platform_device *pdev,
-- 
1.8.3.2

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