mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
|
|
* Copyright © 2015 Broadcom Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#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 iproc_nand_soc_priv {
|
|
void __iomem *idm_base;
|
|
void __iomem *ext_base;
|
|
spinlock_t idm_lock;
|
|
};
|
|
|
|
#define IPROC_NAND_CTLR_READY_OFFSET 0x10
|
|
#define IPROC_NAND_CTLR_READY BIT(0)
|
|
|
|
#define IPROC_NAND_IO_CTRL_OFFSET 0x00
|
|
#define IPROC_NAND_APB_LE_MODE BIT(24)
|
|
#define IPROC_NAND_INT_CTRL_READ_ENABLE BIT(6)
|
|
|
|
static bool iproc_nand_intc_ack(struct brcmnand_soc *soc)
|
|
{
|
|
struct iproc_nand_soc_priv *priv = soc->priv;
|
|
void __iomem *mmio = priv->ext_base + IPROC_NAND_CTLR_READY_OFFSET;
|
|
u32 val = brcmnand_readl(mmio);
|
|
|
|
if (val & IPROC_NAND_CTLR_READY) {
|
|
brcmnand_writel(IPROC_NAND_CTLR_READY, mmio);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void iproc_nand_intc_set(struct brcmnand_soc *soc, bool en)
|
|
{
|
|
struct iproc_nand_soc_priv *priv = soc->priv;
|
|
void __iomem *mmio = priv->idm_base + IPROC_NAND_IO_CTRL_OFFSET;
|
|
u32 val;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->idm_lock, flags);
|
|
|
|
val = brcmnand_readl(mmio);
|
|
|
|
if (en)
|
|
val |= IPROC_NAND_INT_CTRL_READ_ENABLE;
|
|
else
|
|
val &= ~IPROC_NAND_INT_CTRL_READ_ENABLE;
|
|
|
|
brcmnand_writel(val, mmio);
|
|
|
|
spin_unlock_irqrestore(&priv->idm_lock, flags);
|
|
}
|
|
|
|
static void iproc_nand_apb_access(struct brcmnand_soc *soc, bool prepare)
|
|
{
|
|
struct iproc_nand_soc_priv *priv = soc->priv;
|
|
void __iomem *mmio = priv->idm_base + IPROC_NAND_IO_CTRL_OFFSET;
|
|
u32 val;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->idm_lock, flags);
|
|
|
|
val = brcmnand_readl(mmio);
|
|
|
|
if (prepare)
|
|
val |= IPROC_NAND_APB_LE_MODE;
|
|
else
|
|
val &= ~IPROC_NAND_APB_LE_MODE;
|
|
|
|
brcmnand_writel(val, mmio);
|
|
|
|
spin_unlock_irqrestore(&priv->idm_lock, flags);
|
|
}
|
|
|
|
static int iproc_nand_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct iproc_nand_soc_priv *priv;
|
|
struct brcmnand_soc *soc;
|
|
struct resource *res;
|
|
|
|
soc = devm_kzalloc(dev, sizeof(*soc), GFP_KERNEL);
|
|
if (!soc)
|
|
return -ENOMEM;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&priv->idm_lock);
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "iproc-idm");
|
|
priv->idm_base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(priv->idm_base))
|
|
return PTR_ERR(priv->idm_base);
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "iproc-ext");
|
|
priv->ext_base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(priv->ext_base))
|
|
return PTR_ERR(priv->ext_base);
|
|
|
|
soc->pdev = pdev;
|
|
soc->priv = priv;
|
|
soc->ctlrdy_ack = iproc_nand_intc_ack;
|
|
soc->ctlrdy_set_enabled = iproc_nand_intc_set;
|
|
soc->prepare_data_bus = iproc_nand_apb_access;
|
|
|
|
return brcmnand_probe(pdev, soc);
|
|
}
|
|
|
|
static const struct of_device_id iproc_nand_of_match[] = {
|
|
{ .compatible = "brcm,nand-iproc" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, iproc_nand_of_match);
|
|
|
|
static struct platform_driver iproc_nand_driver = {
|
|
.probe = iproc_nand_probe,
|
|
.remove = brcmnand_remove,
|
|
.driver = {
|
|
.name = "iproc_nand",
|
|
.pm = &brcmnand_pm_ops,
|
|
.of_match_table = iproc_nand_of_match,
|
|
}
|
|
};
|
|
module_platform_driver(iproc_nand_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Brian Norris");
|
|
MODULE_AUTHOR("Ray Jui");
|
|
MODULE_DESCRIPTION("NAND driver for Broadcom IPROC-based SoCs");
|