mtd: nand: driver for Nomadik 8815 SoC (on NHK8815 board)

Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Alessandro Rubini 2009-07-29 18:51:56 +02:00 committed by David Woodhouse
parent 6469f540ea
commit 63234717d1
7 changed files with 395 additions and 1 deletions

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@ -498,7 +498,7 @@ CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_DOC2001PLUS is not set
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_VERIFY_WRITE=y
# CONFIG_MTD_NAND_ECC_SMC is not set
CONFIG_MTD_NAND_ECC_SMC=y
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
# CONFIG_MTD_NAND_GPIO is not set
CONFIG_MTD_NAND_IDS=y

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@ -16,12 +16,103 @@
#include <linux/amba/bus.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <asm/sizes.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <mach/setup.h>
#include <mach/nand.h>
#include <mach/fsmc.h>
#include "clock.h"
/* These adresses span 16MB, so use three individual pages */
static struct resource nhk8815_nand_resources[] = {
{
.name = "nand_addr",
.start = NAND_IO_ADDR,
.end = NAND_IO_ADDR + 0xfff,
.flags = IORESOURCE_MEM,
}, {
.name = "nand_cmd",
.start = NAND_IO_CMD,
.end = NAND_IO_CMD + 0xfff,
.flags = IORESOURCE_MEM,
}, {
.name = "nand_data",
.start = NAND_IO_DATA,
.end = NAND_IO_DATA + 0xfff,
.flags = IORESOURCE_MEM,
}
};
static int nhk8815_nand_init(void)
{
/* FSMC setup for nand chip select (8-bit nand in 8815NHK) */
writel(0x0000000E, FSMC_PCR(0));
writel(0x000D0A00, FSMC_PMEM(0));
writel(0x00100A00, FSMC_PATT(0));
/* enable access to the chip select area */
writel(readl(FSMC_PCR(0)) | 0x04, FSMC_PCR(0));
return 0;
}
/*
* These partitions are the same as those used in the 2.6.20 release
* shipped by the vendor; the first two partitions are mandated
* by the boot ROM, and the bootloader area is somehow oversized...
*/
static struct mtd_partition nhk8815_partitions[] = {
{
.name = "X-Loader(NAND)",
.offset = 0,
.size = SZ_256K,
}, {
.name = "MemInit(NAND)",
.offset = MTDPART_OFS_APPEND,
.size = SZ_256K,
}, {
.name = "BootLoader(NAND)",
.offset = MTDPART_OFS_APPEND,
.size = SZ_2M,
}, {
.name = "Kernel zImage(NAND)",
.offset = MTDPART_OFS_APPEND,
.size = 3 * SZ_1M,
}, {
.name = "Root Filesystem(NAND)",
.offset = MTDPART_OFS_APPEND,
.size = 22 * SZ_1M,
}, {
.name = "User Filesystem(NAND)",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
}
};
static struct nomadik_nand_platform_data nhk8815_nand_data = {
.parts = nhk8815_partitions,
.nparts = ARRAY_SIZE(nhk8815_partitions),
.options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING \
| NAND_NO_READRDY | NAND_NO_AUTOINCR,
.init = nhk8815_nand_init,
};
static struct platform_device nhk8815_nand_device = {
.name = "nomadik_nand",
.dev = {
.platform_data = &nhk8815_nand_data,
},
.resource = nhk8815_nand_resources,
.num_resources = ARRAY_SIZE(nhk8815_nand_resources),
};
#define __MEM_4K_RESOURCE(x) \
.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
@ -81,6 +172,7 @@ static int __init nhk8815_eth_init(void)
device_initcall(nhk8815_eth_init);
static struct platform_device *nhk8815_platform_devices[] __initdata = {
&nhk8815_nand_device,
&nhk8815_eth_device,
/* will add more devices */
};

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@ -0,0 +1,29 @@
/* Definitions for the Nomadik FSMC "Flexible Static Memory controller" */
#ifndef __ASM_ARCH_FSMC_H
#define __ASM_ARCH_FSMC_H
#include <mach/hardware.h>
/*
* Register list
*/
/* bus control reg. and bus timing reg. for CS0..CS3 */
#define FSMC_BCR(x) (NOMADIK_FSMC_VA + (x << 3))
#define FSMC_BTR(x) (NOMADIK_FSMC_VA + (x << 3) + 0x04)
/* PC-card and NAND:
* PCR = control register
* PMEM = memory timing
* PATT = attribute timing
* PIO = I/O timing
* PECCR = ECC result
*/
#define FSMC_PCR(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x00)
#define FSMC_PMEM(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x08)
#define FSMC_PATT(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x0c)
#define FSMC_PIO(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x10)
#define FSMC_PECCR(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x14)
#endif /* __ASM_ARCH_FSMC_H */

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@ -0,0 +1,16 @@
#ifndef __ASM_ARCH_NAND_H
#define __ASM_ARCH_NAND_H
struct nomadik_nand_platform_data {
struct mtd_partition *parts;
int nparts;
int options;
int (*init) (void);
int (*exit) (void);
};
#define NAND_IO_DATA 0x40000000
#define NAND_IO_CMD 0x40800000
#define NAND_IO_ADDR 0x41000000
#endif /* __ASM_ARCH_NAND_H */

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@ -443,6 +443,12 @@ config MTD_NAND_MXC
This enables the driver for the NAND flash controller on the
MXC processors.
config MTD_NAND_NOMADIK
tristate "ST Nomadik 8815 NAND support"
depends on ARCH_NOMADIK
help
Driver for the NAND flash controller on the Nomadik, with ECC.
config MTD_NAND_SH_FLCTL
tristate "Support for NAND on Renesas SuperH FLCTL"
depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723

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@ -41,5 +41,6 @@ obj-$(CONFIG_MTD_NAND_MXC) += mxc_nand.o
obj-$(CONFIG_MTD_NAND_SOCRATES) += socrates_nand.o
obj-$(CONFIG_MTD_NAND_TXX9NDFMC) += txx9ndfmc.o
obj-$(CONFIG_MTD_NAND_W90P910) += w90p910_nand.o
obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o
nand-objs := nand_base.o nand_bbt.o

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@ -0,0 +1,250 @@
/*
* drivers/mtd/nand/nomadik_nand.c
*
* Overview:
* Driver for on-board NAND flash on Nomadik Platforms
*
* Copyright © 2007 STMicroelectronics Pvt. Ltd.
* Author: Sachin Verma <sachin.verma@st.com>
*
* Copyright © 2009 Alessandro Rubini
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <mach/nand.h>
#include <mach/fsmc.h>
#include <mtd/mtd-abi.h>
struct nomadik_nand_host {
struct mtd_info mtd;
struct nand_chip nand;
void __iomem *data_va;
void __iomem *cmd_va;
void __iomem *addr_va;
struct nand_bbt_descr *bbt_desc;
};
static struct nand_ecclayout nomadik_ecc_layout = {
.eccbytes = 3 * 4,
.eccpos = { /* each subpage has 16 bytes: pos 2,3,4 hosts ECC */
0x02, 0x03, 0x04,
0x12, 0x13, 0x14,
0x22, 0x23, 0x24,
0x32, 0x33, 0x34},
/* let's keep bytes 5,6,7 for us, just in case we change ECC algo */
.oobfree = { {0x08, 0x08}, {0x18, 0x08}, {0x28, 0x08}, {0x38, 0x08} },
};
static void nomadik_ecc_control(struct mtd_info *mtd, int mode)
{
/* No need to enable hw ecc, it's on by default */
}
static void nomadik_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct nand_chip *nand = mtd->priv;
struct nomadik_nand_host *host = nand->priv;
if (cmd == NAND_CMD_NONE)
return;
if (ctrl & NAND_CLE)
writeb(cmd, host->cmd_va);
else
writeb(cmd, host->addr_va);
}
static int nomadik_nand_probe(struct platform_device *pdev)
{
struct nomadik_nand_platform_data *pdata = pdev->dev.platform_data;
struct nomadik_nand_host *host;
struct mtd_info *mtd;
struct nand_chip *nand;
struct resource *res;
int ret = 0;
/* Allocate memory for the device structure (and zero it) */
host = kzalloc(sizeof(struct nomadik_nand_host), GFP_KERNEL);
if (!host) {
dev_err(&pdev->dev, "Failed to allocate device structure.\n");
return -ENOMEM;
}
/* Call the client's init function, if any */
if (pdata->init)
ret = pdata->init();
if (ret < 0) {
dev_err(&pdev->dev, "Init function failed\n");
goto err;
}
/* ioremap three regions */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_addr");
if (!res) {
ret = -EIO;
goto err_unmap;
}
host->addr_va = ioremap(res->start, res->end - res->start + 1);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
if (!res) {
ret = -EIO;
goto err_unmap;
}
host->data_va = ioremap(res->start, res->end - res->start + 1);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_cmd");
if (!res) {
ret = -EIO;
goto err_unmap;
}
host->cmd_va = ioremap(res->start, res->end - res->start + 1);
if (!host->addr_va || !host->data_va || !host->cmd_va) {
ret = -ENOMEM;
goto err_unmap;
}
/* Link all private pointers */
mtd = &host->mtd;
nand = &host->nand;
mtd->priv = nand;
nand->priv = host;
host->mtd.owner = THIS_MODULE;
nand->IO_ADDR_R = host->data_va;
nand->IO_ADDR_W = host->data_va;
nand->cmd_ctrl = nomadik_cmd_ctrl;
/*
* This stanza declares ECC_HW but uses soft routines. It's because
* HW claims to make the calculation but not the correction. However,
* I haven't managed to get the desired data out of it until now.
*/
nand->ecc.mode = NAND_ECC_SOFT;
nand->ecc.layout = &nomadik_ecc_layout;
nand->ecc.hwctl = nomadik_ecc_control;
nand->ecc.size = 512;
nand->ecc.bytes = 3;
nand->options = pdata->options;
/*
* Scan to find existance of the device
*/
if (nand_scan(&host->mtd, 1)) {
ret = -ENXIO;
goto err_unmap;
}
#ifdef CONFIG_MTD_PARTITIONS
add_mtd_partitions(&host->mtd, pdata->parts, pdata->nparts);
#else
pr_info("Registering %s as whole device\n", mtd->name);
add_mtd_device(mtd);
#endif
platform_set_drvdata(pdev, host);
return 0;
err_unmap:
if (host->cmd_va)
iounmap(host->cmd_va);
if (host->data_va)
iounmap(host->data_va);
if (host->addr_va)
iounmap(host->addr_va);
err:
kfree(host);
return ret;
}
/*
* Clean up routine
*/
static int nomadik_nand_remove(struct platform_device *pdev)
{
struct nomadik_nand_host *host = platform_get_drvdata(pdev);
struct nomadik_nand_platform_data *pdata = pdev->dev.platform_data;
if (pdata->exit)
pdata->exit();
if (host) {
iounmap(host->cmd_va);
iounmap(host->data_va);
iounmap(host->addr_va);
kfree(host);
}
return 0;
}
static int nomadik_nand_suspend(struct device *dev)
{
struct nomadik_nand_host *host = dev_get_drvdata(dev);
int ret = 0;
if (host)
ret = host->mtd.suspend(&host->mtd);
return ret;
}
static int nomadik_nand_resume(struct device *dev)
{
struct nomadik_nand_host *host = dev_get_drvdata(dev);
if (host)
host->mtd.resume(&host->mtd);
return 0;
}
static struct dev_pm_ops nomadik_nand_pm_ops = {
.suspend = nomadik_nand_suspend,
.resume = nomadik_nand_resume,
};
static struct platform_driver nomadik_nand_driver = {
.probe = nomadik_nand_probe,
.remove = nomadik_nand_remove,
.driver = {
.owner = THIS_MODULE,
.name = "nomadik_nand",
.pm = &nomadik_nand_pm_ops,
},
};
static int __init nand_nomadik_init(void)
{
pr_info("Nomadik NAND driver\n");
return platform_driver_register(&nomadik_nand_driver);
}
static void __exit nand_nomadik_exit(void)
{
platform_driver_unregister(&nomadik_nand_driver);
}
module_init(nand_nomadik_init);
module_exit(nand_nomadik_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("ST Microelectronics (sachin.verma@st.com)");
MODULE_DESCRIPTION("NAND driver for Nomadik Platform");