forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
3.5 KiB
134 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright 2015 Simon Arlott |
|
* |
|
* Derived from bcm63138_nand.c: |
|
* Copyright © 2015 Broadcom Corporation |
|
* |
|
* Derived from bcm963xx_4.12L.06B_consumer/shared/opensource/include/bcm963xx/63268_map_part.h: |
|
* Copyright 2000-2010 Broadcom Corporation |
|
* |
|
* Derived from bcm963xx_4.12L.06B_consumer/shared/opensource/flash/nandflash.c: |
|
* Copyright 2000-2010 Broadcom Corporation |
|
*/ |
|
|
|
#include <linux/device.h> |
|
#include <linux/io.h> |
|
#include <linux/ioport.h> |
|
#include <linux/module.h> |
|
#include <linux/of.h> |
|
#include <linux/of_address.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
|
|
#include "brcmnand.h" |
|
|
|
struct bcm6368_nand_soc { |
|
struct brcmnand_soc soc; |
|
void __iomem *base; |
|
}; |
|
|
|
#define BCM6368_NAND_INT 0x00 |
|
#define BCM6368_NAND_STATUS_SHIFT 0 |
|
#define BCM6368_NAND_STATUS_MASK (0xfff << BCM6368_NAND_STATUS_SHIFT) |
|
#define BCM6368_NAND_ENABLE_SHIFT 16 |
|
#define BCM6368_NAND_ENABLE_MASK (0xffff << BCM6368_NAND_ENABLE_SHIFT) |
|
#define BCM6368_NAND_BASE_ADDR0 0x04 |
|
#define BCM6368_NAND_BASE_ADDR1 0x0c |
|
|
|
enum { |
|
BCM6368_NP_READ = BIT(0), |
|
BCM6368_BLOCK_ERASE = BIT(1), |
|
BCM6368_COPY_BACK = BIT(2), |
|
BCM6368_PAGE_PGM = BIT(3), |
|
BCM6368_CTRL_READY = BIT(4), |
|
BCM6368_DEV_RBPIN = BIT(5), |
|
BCM6368_ECC_ERR_UNC = BIT(6), |
|
BCM6368_ECC_ERR_CORR = BIT(7), |
|
}; |
|
|
|
static bool bcm6368_nand_intc_ack(struct brcmnand_soc *soc) |
|
{ |
|
struct bcm6368_nand_soc *priv = |
|
container_of(soc, struct bcm6368_nand_soc, soc); |
|
void __iomem *mmio = priv->base + BCM6368_NAND_INT; |
|
u32 val = brcmnand_readl(mmio); |
|
|
|
if (val & (BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT)) { |
|
/* Ack interrupt */ |
|
val &= ~BCM6368_NAND_STATUS_MASK; |
|
val |= BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT; |
|
brcmnand_writel(val, mmio); |
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static void bcm6368_nand_intc_set(struct brcmnand_soc *soc, bool en) |
|
{ |
|
struct bcm6368_nand_soc *priv = |
|
container_of(soc, struct bcm6368_nand_soc, soc); |
|
void __iomem *mmio = priv->base + BCM6368_NAND_INT; |
|
u32 val = brcmnand_readl(mmio); |
|
|
|
/* Don't ack any interrupts */ |
|
val &= ~BCM6368_NAND_STATUS_MASK; |
|
|
|
if (en) |
|
val |= BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT; |
|
else |
|
val &= ~(BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT); |
|
|
|
brcmnand_writel(val, mmio); |
|
} |
|
|
|
static int bcm6368_nand_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
struct bcm6368_nand_soc *priv; |
|
struct brcmnand_soc *soc; |
|
struct resource *res; |
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
soc = &priv->soc; |
|
|
|
res = platform_get_resource_byname(pdev, |
|
IORESOURCE_MEM, "nand-int-base"); |
|
priv->base = devm_ioremap_resource(dev, res); |
|
if (IS_ERR(priv->base)) |
|
return PTR_ERR(priv->base); |
|
|
|
soc->ctlrdy_ack = bcm6368_nand_intc_ack; |
|
soc->ctlrdy_set_enabled = bcm6368_nand_intc_set; |
|
|
|
/* Disable and ack all interrupts */ |
|
brcmnand_writel(0, priv->base + BCM6368_NAND_INT); |
|
brcmnand_writel(BCM6368_NAND_STATUS_MASK, |
|
priv->base + BCM6368_NAND_INT); |
|
|
|
return brcmnand_probe(pdev, soc); |
|
} |
|
|
|
static const struct of_device_id bcm6368_nand_of_match[] = { |
|
{ .compatible = "brcm,nand-bcm6368" }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, bcm6368_nand_of_match); |
|
|
|
static struct platform_driver bcm6368_nand_driver = { |
|
.probe = bcm6368_nand_probe, |
|
.remove = brcmnand_remove, |
|
.driver = { |
|
.name = "bcm6368_nand", |
|
.pm = &brcmnand_pm_ops, |
|
.of_match_table = bcm6368_nand_of_match, |
|
} |
|
}; |
|
module_platform_driver(bcm6368_nand_driver); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Simon Arlott"); |
|
MODULE_DESCRIPTION("NAND driver for BCM6368");
|
|
|