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>hifive-unleashed-5.1
Alessandro Rubini
David Woodhouse
parent
6469f540ea
commit
63234717d1
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@ -498,7 +498,7 @@ CONFIG_MTD_CFI_I2=y
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# CONFIG_MTD_DOC2001PLUS is not set
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CONFIG_MTD_NAND=y
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CONFIG_MTD_NAND_VERIFY_WRITE=y
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# CONFIG_MTD_NAND_ECC_SMC is not set
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CONFIG_MTD_NAND_ECC_SMC=y
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# CONFIG_MTD_NAND_MUSEUM_IDS is not set
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# CONFIG_MTD_NAND_GPIO is not set
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CONFIG_MTD_NAND_IDS=y
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@ -16,12 +16,103 @@
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#include <linux/amba/bus.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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#include <linux/io.h>
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#include <asm/sizes.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/irq.h>
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#include <mach/setup.h>
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#include <mach/nand.h>
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#include <mach/fsmc.h>
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#include "clock.h"
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/* These adresses span 16MB, so use three individual pages */
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static struct resource nhk8815_nand_resources[] = {
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{
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.name = "nand_addr",
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.start = NAND_IO_ADDR,
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.end = NAND_IO_ADDR + 0xfff,
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.flags = IORESOURCE_MEM,
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}, {
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.name = "nand_cmd",
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.start = NAND_IO_CMD,
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.end = NAND_IO_CMD + 0xfff,
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.flags = IORESOURCE_MEM,
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}, {
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.name = "nand_data",
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.start = NAND_IO_DATA,
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.end = NAND_IO_DATA + 0xfff,
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.flags = IORESOURCE_MEM,
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}
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};
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static int nhk8815_nand_init(void)
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{
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/* FSMC setup for nand chip select (8-bit nand in 8815NHK) */
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writel(0x0000000E, FSMC_PCR(0));
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writel(0x000D0A00, FSMC_PMEM(0));
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writel(0x00100A00, FSMC_PATT(0));
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/* enable access to the chip select area */
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writel(readl(FSMC_PCR(0)) | 0x04, FSMC_PCR(0));
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return 0;
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}
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/*
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* These partitions are the same as those used in the 2.6.20 release
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* shipped by the vendor; the first two partitions are mandated
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* by the boot ROM, and the bootloader area is somehow oversized...
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*/
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static struct mtd_partition nhk8815_partitions[] = {
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{
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.name = "X-Loader(NAND)",
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.offset = 0,
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.size = SZ_256K,
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}, {
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.name = "MemInit(NAND)",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_256K,
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}, {
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.name = "BootLoader(NAND)",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_2M,
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}, {
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.name = "Kernel zImage(NAND)",
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.offset = MTDPART_OFS_APPEND,
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.size = 3 * SZ_1M,
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}, {
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.name = "Root Filesystem(NAND)",
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.offset = MTDPART_OFS_APPEND,
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.size = 22 * SZ_1M,
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}, {
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.name = "User Filesystem(NAND)",
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.offset = MTDPART_OFS_APPEND,
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.size = MTDPART_SIZ_FULL,
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}
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};
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static struct nomadik_nand_platform_data nhk8815_nand_data = {
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.parts = nhk8815_partitions,
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.nparts = ARRAY_SIZE(nhk8815_partitions),
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.options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING \
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| NAND_NO_READRDY | NAND_NO_AUTOINCR,
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.init = nhk8815_nand_init,
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};
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static struct platform_device nhk8815_nand_device = {
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.name = "nomadik_nand",
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.dev = {
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.platform_data = &nhk8815_nand_data,
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},
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.resource = nhk8815_nand_resources,
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.num_resources = ARRAY_SIZE(nhk8815_nand_resources),
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};
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#define __MEM_4K_RESOURCE(x) \
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.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
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@ -81,6 +172,7 @@ static int __init nhk8815_eth_init(void)
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device_initcall(nhk8815_eth_init);
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static struct platform_device *nhk8815_platform_devices[] __initdata = {
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&nhk8815_nand_device,
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&nhk8815_eth_device,
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/* will add more devices */
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};
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@ -0,0 +1,29 @@
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/* Definitions for the Nomadik FSMC "Flexible Static Memory controller" */
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#ifndef __ASM_ARCH_FSMC_H
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#define __ASM_ARCH_FSMC_H
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#include <mach/hardware.h>
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/*
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* Register list
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*/
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/* bus control reg. and bus timing reg. for CS0..CS3 */
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#define FSMC_BCR(x) (NOMADIK_FSMC_VA + (x << 3))
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#define FSMC_BTR(x) (NOMADIK_FSMC_VA + (x << 3) + 0x04)
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/* PC-card and NAND:
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* PCR = control register
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* PMEM = memory timing
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* PATT = attribute timing
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* PIO = I/O timing
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* PECCR = ECC result
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*/
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#define FSMC_PCR(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x00)
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#define FSMC_PMEM(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x08)
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#define FSMC_PATT(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x0c)
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#define FSMC_PIO(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x10)
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#define FSMC_PECCR(x) (NOMADIK_FSMC_VA + ((2 + x) << 5) + 0x14)
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#endif /* __ASM_ARCH_FSMC_H */
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@ -0,0 +1,16 @@
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#ifndef __ASM_ARCH_NAND_H
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#define __ASM_ARCH_NAND_H
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struct nomadik_nand_platform_data {
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struct mtd_partition *parts;
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int nparts;
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int options;
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int (*init) (void);
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int (*exit) (void);
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};
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#define NAND_IO_DATA 0x40000000
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#define NAND_IO_CMD 0x40800000
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#define NAND_IO_ADDR 0x41000000
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#endif /* __ASM_ARCH_NAND_H */
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@ -443,6 +443,12 @@ config MTD_NAND_MXC
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This enables the driver for the NAND flash controller on the
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MXC processors.
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config MTD_NAND_NOMADIK
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tristate "ST Nomadik 8815 NAND support"
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depends on ARCH_NOMADIK
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help
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Driver for the NAND flash controller on the Nomadik, with ECC.
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config MTD_NAND_SH_FLCTL
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tristate "Support for NAND on Renesas SuperH FLCTL"
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depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723
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@ -41,5 +41,6 @@ obj-$(CONFIG_MTD_NAND_MXC) += mxc_nand.o
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obj-$(CONFIG_MTD_NAND_SOCRATES) += socrates_nand.o
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obj-$(CONFIG_MTD_NAND_TXX9NDFMC) += txx9ndfmc.o
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obj-$(CONFIG_MTD_NAND_W90P910) += w90p910_nand.o
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obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o
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nand-objs := nand_base.o nand_bbt.o
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@ -0,0 +1,250 @@
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/*
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* drivers/mtd/nand/nomadik_nand.c
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*
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* Overview:
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* Driver for on-board NAND flash on Nomadik Platforms
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*
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* Copyright © 2007 STMicroelectronics Pvt. Ltd.
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* Author: Sachin Verma <sachin.verma@st.com>
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*
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* Copyright © 2009 Alessandro Rubini
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/nand_ecc.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/partitions.h>
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#include <linux/io.h>
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#include <mach/nand.h>
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#include <mach/fsmc.h>
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#include <mtd/mtd-abi.h>
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struct nomadik_nand_host {
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struct mtd_info mtd;
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struct nand_chip nand;
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void __iomem *data_va;
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void __iomem *cmd_va;
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void __iomem *addr_va;
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struct nand_bbt_descr *bbt_desc;
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};
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static struct nand_ecclayout nomadik_ecc_layout = {
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.eccbytes = 3 * 4,
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.eccpos = { /* each subpage has 16 bytes: pos 2,3,4 hosts ECC */
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0x02, 0x03, 0x04,
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0x12, 0x13, 0x14,
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0x22, 0x23, 0x24,
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0x32, 0x33, 0x34},
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/* let's keep bytes 5,6,7 for us, just in case we change ECC algo */
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.oobfree = { {0x08, 0x08}, {0x18, 0x08}, {0x28, 0x08}, {0x38, 0x08} },
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};
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static void nomadik_ecc_control(struct mtd_info *mtd, int mode)
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{
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/* No need to enable hw ecc, it's on by default */
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}
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static void nomadik_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
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{
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struct nand_chip *nand = mtd->priv;
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struct nomadik_nand_host *host = nand->priv;
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if (cmd == NAND_CMD_NONE)
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return;
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if (ctrl & NAND_CLE)
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writeb(cmd, host->cmd_va);
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else
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writeb(cmd, host->addr_va);
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}
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static int nomadik_nand_probe(struct platform_device *pdev)
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{
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struct nomadik_nand_platform_data *pdata = pdev->dev.platform_data;
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struct nomadik_nand_host *host;
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struct mtd_info *mtd;
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struct nand_chip *nand;
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struct resource *res;
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int ret = 0;
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/* Allocate memory for the device structure (and zero it) */
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host = kzalloc(sizeof(struct nomadik_nand_host), GFP_KERNEL);
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if (!host) {
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dev_err(&pdev->dev, "Failed to allocate device structure.\n");
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return -ENOMEM;
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}
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/* Call the client's init function, if any */
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if (pdata->init)
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ret = pdata->init();
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if (ret < 0) {
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dev_err(&pdev->dev, "Init function failed\n");
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goto err;
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}
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/* ioremap three regions */
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_addr");
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if (!res) {
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ret = -EIO;
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goto err_unmap;
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}
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host->addr_va = ioremap(res->start, res->end - res->start + 1);
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
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if (!res) {
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ret = -EIO;
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goto err_unmap;
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}
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host->data_va = ioremap(res->start, res->end - res->start + 1);
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_cmd");
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if (!res) {
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ret = -EIO;
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goto err_unmap;
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}
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host->cmd_va = ioremap(res->start, res->end - res->start + 1);
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if (!host->addr_va || !host->data_va || !host->cmd_va) {
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ret = -ENOMEM;
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goto err_unmap;
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}
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/* Link all private pointers */
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mtd = &host->mtd;
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nand = &host->nand;
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mtd->priv = nand;
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nand->priv = host;
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host->mtd.owner = THIS_MODULE;
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nand->IO_ADDR_R = host->data_va;
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nand->IO_ADDR_W = host->data_va;
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nand->cmd_ctrl = nomadik_cmd_ctrl;
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/*
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* This stanza declares ECC_HW but uses soft routines. It's because
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* HW claims to make the calculation but not the correction. However,
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* I haven't managed to get the desired data out of it until now.
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*/
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nand->ecc.mode = NAND_ECC_SOFT;
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nand->ecc.layout = &nomadik_ecc_layout;
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nand->ecc.hwctl = nomadik_ecc_control;
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nand->ecc.size = 512;
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nand->ecc.bytes = 3;
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nand->options = pdata->options;
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/*
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* Scan to find existance of the device
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*/
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if (nand_scan(&host->mtd, 1)) {
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ret = -ENXIO;
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goto err_unmap;
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}
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#ifdef CONFIG_MTD_PARTITIONS
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add_mtd_partitions(&host->mtd, pdata->parts, pdata->nparts);
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#else
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pr_info("Registering %s as whole device\n", mtd->name);
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add_mtd_device(mtd);
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#endif
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platform_set_drvdata(pdev, host);
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return 0;
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err_unmap:
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if (host->cmd_va)
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iounmap(host->cmd_va);
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if (host->data_va)
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iounmap(host->data_va);
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if (host->addr_va)
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iounmap(host->addr_va);
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err:
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kfree(host);
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return ret;
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}
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/*
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* Clean up routine
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*/
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static int nomadik_nand_remove(struct platform_device *pdev)
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{
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struct nomadik_nand_host *host = platform_get_drvdata(pdev);
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struct nomadik_nand_platform_data *pdata = pdev->dev.platform_data;
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if (pdata->exit)
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pdata->exit();
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if (host) {
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iounmap(host->cmd_va);
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iounmap(host->data_va);
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iounmap(host->addr_va);
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kfree(host);
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}
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return 0;
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}
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static int nomadik_nand_suspend(struct device *dev)
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{
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struct nomadik_nand_host *host = dev_get_drvdata(dev);
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int ret = 0;
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if (host)
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ret = host->mtd.suspend(&host->mtd);
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return ret;
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}
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static int nomadik_nand_resume(struct device *dev)
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{
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struct nomadik_nand_host *host = dev_get_drvdata(dev);
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if (host)
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host->mtd.resume(&host->mtd);
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return 0;
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}
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static struct dev_pm_ops nomadik_nand_pm_ops = {
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.suspend = nomadik_nand_suspend,
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.resume = nomadik_nand_resume,
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};
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static struct platform_driver nomadik_nand_driver = {
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.probe = nomadik_nand_probe,
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.remove = nomadik_nand_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "nomadik_nand",
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.pm = &nomadik_nand_pm_ops,
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},
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};
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static int __init nand_nomadik_init(void)
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{
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pr_info("Nomadik NAND driver\n");
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return platform_driver_register(&nomadik_nand_driver);
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}
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static void __exit nand_nomadik_exit(void)
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{
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platform_driver_unregister(&nomadik_nand_driver);
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}
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module_init(nand_nomadik_init);
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module_exit(nand_nomadik_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("ST Microelectronics (sachin.verma@st.com)");
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MODULE_DESCRIPTION("NAND driver for Nomadik Platform");
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Reference in New Issue