[thirdparty/u-boot.git] / drivers / mtd / nand / raw / brcmnand / bcm6753_nand.c

// SPDX-License-Identifier: GPL-2.0+

#include <common.h>
#include <asm/io.h>
#include <memalign.h>
#include <nand.h>
#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <dm.h>

#include "brcmnand.h"

struct bcm6753_nand_soc {
	struct brcmnand_soc soc;
	void __iomem *base;
};

#define BCM6753_NAND_INT		0x00
#define BCM6753_NAND_STATUS_SHIFT	0
#define BCM6753_NAND_STATUS_MASK	(0xfff << BCM6753_NAND_STATUS_SHIFT)

#define BCM6753_NAND_INT_EN		0x04
#define BCM6753_NAND_ENABLE_SHIFT	0
#define BCM6753_NAND_ENABLE_MASK	(0xffff << BCM6753_NAND_ENABLE_SHIFT)

enum {
	BCM6753_NP_READ		= BIT(0),
	BCM6753_BLOCK_ERASE	= BIT(1),
	BCM6753_COPY_BACK	= BIT(2),
	BCM6753_PAGE_PGM	= BIT(3),
	BCM6753_CTRL_READY	= BIT(4),
	BCM6753_DEV_RBPIN	= BIT(5),
	BCM6753_ECC_ERR_UNC	= BIT(6),
	BCM6753_ECC_ERR_CORR	= BIT(7),
};

static bool bcm6753_nand_intc_ack(struct brcmnand_soc *soc)
{
	struct bcm6753_nand_soc *priv =
			container_of(soc, struct bcm6753_nand_soc, soc);
	void __iomem *mmio = priv->base + BCM6753_NAND_INT;
	u32 val = brcmnand_readl(mmio);

	if (val & (BCM6753_CTRL_READY << BCM6753_NAND_STATUS_SHIFT)) {
		/* Ack interrupt */
		val &= ~BCM6753_NAND_STATUS_MASK;
		val |= BCM6753_CTRL_READY << BCM6753_NAND_STATUS_SHIFT;
		brcmnand_writel(val, mmio);
		return true;
	}

	return false;
}

static void bcm6753_nand_intc_set(struct brcmnand_soc *soc, bool en)
{
	struct bcm6753_nand_soc *priv =
			container_of(soc, struct bcm6753_nand_soc, soc);
	void __iomem *mmio = priv->base + BCM6753_NAND_INT_EN;
	u32 val = brcmnand_readl(mmio);

	/* Don't ack any interrupts */
	val &= ~BCM6753_NAND_STATUS_MASK;

	if (en)
		val |= BCM6753_CTRL_READY << BCM6753_NAND_ENABLE_SHIFT;
	else
		val &= ~(BCM6753_CTRL_READY << BCM6753_NAND_ENABLE_SHIFT);

	brcmnand_writel(val, mmio);
}

static int bcm6753_nand_probe(struct udevice *dev)
{
	struct udevice *pdev = dev;
	struct bcm6753_nand_soc *priv = dev_get_priv(dev);
	struct brcmnand_soc *soc;
	struct resource res;

	soc = &priv->soc;

	dev_read_resource_byname(pdev, "nand-int-base", &res);
	priv->base = devm_ioremap(dev, res.start, resource_size(&res));
	if (IS_ERR(priv->base))
		return PTR_ERR(priv->base);

	soc->ctlrdy_ack = bcm6753_nand_intc_ack;
	soc->ctlrdy_set_enabled = bcm6753_nand_intc_set;

	/* Disable and ack all interrupts  */
	brcmnand_writel(0, priv->base + BCM6753_NAND_INT_EN);
	brcmnand_writel(0, priv->base + BCM6753_NAND_INT);

	return brcmnand_probe(pdev, soc);
}

static const struct udevice_id bcm6753_nand_dt_ids[] = {
	{
		.compatible = "brcm,nand-bcm6753",
	},
	{ /* sentinel */ }
};

U_BOOT_DRIVER(bcm6753_nand) = {
	.name = "bcm6753-nand",
	.id = UCLASS_MTD,
	.of_match = bcm6753_nand_dt_ids,
	.probe = bcm6753_nand_probe,
	.priv_auto = sizeof(struct bcm6753_nand_soc),
};

void board_nand_init(void)
{
	struct udevice *dev;
	int ret;

	ret = uclass_get_device_by_driver(UCLASS_MTD,
					  DM_DRIVER_GET(bcm6753_nand), &dev);
	if (ret && ret != -ENODEV)
		pr_err("Failed to initialize %s. (error %d)\n", dev->name,
		       ret);
}
Commit	Line	Data
0d32ebfc PR	1	// SPDX-License-Identifier: GPL-2.0+
0d32ebfc PR	2
d678a59d	3	#include <common.h>
0d32ebfc PR	4	#include <asm/io.h>
	5	#include <memalign.h>
	6	#include <nand.h>
	7	#include <linux/bitops.h>
	8	#include <linux/errno.h>
	9	#include <linux/io.h>
	10	#include <linux/ioport.h>
	11	#include <dm.h>
	12
	13	#include "brcmnand.h"
	14
	15	struct bcm6753_nand_soc {
	16	struct brcmnand_soc soc;
	17	void __iomem *base;
	18	};
	19
	20	#define BCM6753_NAND_INT 0x00
	21	#define BCM6753_NAND_STATUS_SHIFT 0
	22	#define BCM6753_NAND_STATUS_MASK (0xfff << BCM6753_NAND_STATUS_SHIFT)
	23
	24	#define BCM6753_NAND_INT_EN 0x04
	25	#define BCM6753_NAND_ENABLE_SHIFT 0
	26	#define BCM6753_NAND_ENABLE_MASK (0xffff << BCM6753_NAND_ENABLE_SHIFT)
	27
	28	enum {
	29	BCM6753_NP_READ = BIT(0),
	30	BCM6753_BLOCK_ERASE = BIT(1),
	31	BCM6753_COPY_BACK = BIT(2),
	32	BCM6753_PAGE_PGM = BIT(3),
	33	BCM6753_CTRL_READY = BIT(4),
	34	BCM6753_DEV_RBPIN = BIT(5),
	35	BCM6753_ECC_ERR_UNC = BIT(6),
	36	BCM6753_ECC_ERR_CORR = BIT(7),
	37	};
	38
	39	static bool bcm6753_nand_intc_ack(struct brcmnand_soc *soc)
	40	{
	41	struct bcm6753_nand_soc *priv =
	42	container_of(soc, struct bcm6753_nand_soc, soc);
	43	void __iomem *mmio = priv->base + BCM6753_NAND_INT;
	44	u32 val = brcmnand_readl(mmio);
	45
	46	if (val & (BCM6753_CTRL_READY << BCM6753_NAND_STATUS_SHIFT)) {
	47	/* Ack interrupt */
	48	val &= ~BCM6753_NAND_STATUS_MASK;
	49	val \|= BCM6753_CTRL_READY << BCM6753_NAND_STATUS_SHIFT;
	50	brcmnand_writel(val, mmio);
	51	return true;
	52	}
	53
	54	return false;
	55	}
	56
	57	static void bcm6753_nand_intc_set(struct brcmnand_soc *soc, bool en)
	58	{
	59	struct bcm6753_nand_soc *priv =
	60	container_of(soc, struct bcm6753_nand_soc, soc);
	61	void __iomem *mmio = priv->base + BCM6753_NAND_INT_EN;
	62	u32 val = brcmnand_readl(mmio);
	63
	64	/* Don't ack any interrupts */
	65	val &= ~BCM6753_NAND_STATUS_MASK;
	66
	67	if (en)
68	val \|= BCM6753_CTRL_READY << BCM6753_NAND_ENABLE_SHIFT;
69	else
70	val &= ~(BCM6753_CTRL_READY << BCM6753_NAND_ENABLE_SHIFT);
71
72	brcmnand_writel(val, mmio);
73	}
74
75	static int bcm6753_nand_probe(struct udevice *dev)
76	{
77	struct udevice *pdev = dev;
78	struct bcm6753_nand_soc *priv = dev_get_priv(dev);
79	struct brcmnand_soc *soc;
80	struct resource res;
81
82	soc = &priv->soc;
83
84	dev_read_resource_byname(pdev, "nand-int-base", &res);
85	priv->base = devm_ioremap(dev, res.start, resource_size(&res));
86	if (IS_ERR(priv->base))
87	return PTR_ERR(priv->base);
88
89	soc->ctlrdy_ack = bcm6753_nand_intc_ack;
90	soc->ctlrdy_set_enabled = bcm6753_nand_intc_set;
91
92	/* Disable and ack all interrupts */
93	brcmnand_writel(0, priv->base + BCM6753_NAND_INT_EN);
94	brcmnand_writel(0, priv->base + BCM6753_NAND_INT);
95
96	return brcmnand_probe(pdev, soc);
97	}
98
99	static const struct udevice_id bcm6753_nand_dt_ids[] = {
100	{
101	.compatible = "brcm,nand-bcm6753",
102	},
103	{ /* sentinel */ }
104	};
105
106	U_BOOT_DRIVER(bcm6753_nand) = {
107	.name = "bcm6753-nand",
108	.id = UCLASS_MTD,
109	.of_match = bcm6753_nand_dt_ids,
110	.probe = bcm6753_nand_probe,
111	.priv_auto = sizeof(struct bcm6753_nand_soc),
112	};
113
114	void board_nand_init(void)
115	{
116	struct udevice *dev;
117	int ret;
118
119	ret = uclass_get_device_by_driver(UCLASS_MTD,
120	DM_DRIVER_GET(bcm6753_nand), &dev);
121	if (ret && ret != -ENODEV)
122	pr_err("Failed to initialize %s. (error %d)\n", dev->name,
123	ret);
124	}