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[MTD] sharpsl-nand: use platform_data for model-specific values
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Add platform_data which holds all model-specific values, like badblocks
pattern, oobinfo, partitions.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
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Dmitry Baryshkov committed Oct 29, 2008
1 parent c176d0c commit a20c7ab
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Showing 2 changed files with 104 additions and 74 deletions.
158 changes: 84 additions & 74 deletions drivers/mtd/nand/sharpsl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/sharpsl.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

Expand Down Expand Up @@ -53,31 +54,6 @@ struct sharpsl_nand {
#define FLCLE (1 << 1)
#define FLCE0 (1 << 0)

#ifdef CONFIG_MTD_PARTITIONS
/*
* Define partitions for flash device
*/
#define DEFAULT_NUM_PARTITIONS 3

static struct mtd_partition sharpsl_nand_default_partition_info[] = {
{
.name = "System Area",
.offset = 0,
.size = 7 * 1024 * 1024,
},
{
.name = "Root Filesystem",
.offset = 7 * 1024 * 1024,
.size = 30 * 1024 * 1024,
},
{
.name = "Home Filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
#endif

/*
* hardware specific access to control-lines
* ctrl:
Expand Down Expand Up @@ -106,31 +82,6 @@ static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd,
writeb(cmd, chip->IO_ADDR_W);
}

static uint8_t scan_ff_pattern[] = { 0xff, 0xff };

static struct nand_bbt_descr sharpsl_bbt = {
.options = 0,
.offs = 4,
.len = 2,
.pattern = scan_ff_pattern
};

static struct nand_bbt_descr sharpsl_akita_bbt = {
.options = 0,
.offs = 4,
.len = 1,
.pattern = scan_ff_pattern
};

static struct nand_ecclayout akita_oobinfo = {
.eccbytes = 24,
.eccpos = {
0x5, 0x1, 0x2, 0x3, 0x6, 0x7, 0x15, 0x11,
0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},
.oobfree = {{0x08, 0x09}}
};

static int sharpsl_nand_dev_ready(struct mtd_info *mtd)
{
struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd);
Expand Down Expand Up @@ -169,6 +120,12 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
struct resource *r;
int err = 0;
struct sharpsl_nand *sharpsl;
struct sharpsl_nand_platform_data *data = pdev->dev.platform_data;

if (!data) {
dev_err(&pdev->dev, "no platform data!\n");
return -EINVAL;
}

/* Allocate memory for MTD device structure and private data */
sharpsl = kzalloc(sizeof(struct sharpsl_nand), GFP_KERNEL);
Expand Down Expand Up @@ -218,11 +175,8 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
this->ecc.mode = NAND_ECC_HW;
this->ecc.size = 256;
this->ecc.bytes = 3;
this->badblock_pattern = &sharpsl_bbt;
if (machine_is_akita() || machine_is_borzoi()) {
this->badblock_pattern = &sharpsl_akita_bbt;
this->ecc.layout = &akita_oobinfo;
}
this->badblock_pattern = data->badblock_pattern;
this->ecc.layout = data->ecc_layout;
this->ecc.hwctl = sharpsl_nand_enable_hwecc;
this->ecc.calculate = sharpsl_nand_calculate_ecc;
this->ecc.correct = nand_correct_data;
Expand All @@ -236,29 +190,16 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
sharpsl->mtd.name = "sharpsl-nand";
#ifdef CONFIG_MTD_PARTITIONS
nr_partitions = parse_mtd_partitions(&sharpsl->mtd, part_probes, &sharpsl_partition_info, 0);

if (nr_partitions <= 0) {
nr_partitions = ARRAY_SIZE(sharpsl_nand_default_partition_info);
sharpsl_partition_info = sharpsl_nand_default_partition_info;
if (machine_is_poodle()) {
sharpsl_partition_info[1].size = 22 * 1024 * 1024;
} else if (machine_is_corgi() || machine_is_shepherd()) {
sharpsl_partition_info[1].size = 25 * 1024 * 1024;
} else if (machine_is_husky()) {
sharpsl_partition_info[1].size = 53 * 1024 * 1024;
} else if (machine_is_spitz()) {
sharpsl_partition_info[1].size = 5 * 1024 * 1024;
} else if (machine_is_akita()) {
sharpsl_partition_info[1].size = 58 * 1024 * 1024;
} else if (machine_is_borzoi()) {
sharpsl_partition_info[1].size = 32 * 1024 * 1024;
}
nr_partitions = data->nr_partitions;
sharpsl_partition_info = data->partitions;
}

err = add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
#else
err = add_mtd_device(&sharpsl->mtd);
if (nr_partitions > 0)
err = add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
else
#endif
err = add_mtd_device(&sharpsl->mtd);
if (err)
goto err_add;

Expand Down Expand Up @@ -306,6 +247,58 @@ static struct platform_driver sharpsl_nand_driver = {
.remove = __devexit_p(sharpsl_nand_remove),
};

/*
* Define partitions for flash device
*/
static struct mtd_partition sharpsl_nand_partitions[] = {
{
.name = "System Area",
.offset = 0,
.size = 7 * 1024 * 1024,
},
{
.name = "Root Filesystem",
.offset = 7 * 1024 * 1024,
.size = 30 * 1024 * 1024,
},
{
.name = "Home Filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};

static uint8_t scan_ff_pattern[] = { 0xff, 0xff };

static struct nand_bbt_descr sharpsl_bbt = {
.options = 0,
.offs = 4,
.len = 2,
.pattern = scan_ff_pattern
};

static struct nand_bbt_descr sharpsl_akita_bbt = {
.options = 0,
.offs = 4,
.len = 1,
.pattern = scan_ff_pattern
};

static struct nand_ecclayout akita_oobinfo = {
.eccbytes = 24,
.eccpos = {
0x5, 0x1, 0x2, 0x3, 0x6, 0x7, 0x15, 0x11,
0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},
.oobfree = {{0x08, 0x09}}
};

static struct sharpsl_nand_platform_data sharpsl_nand_platform_data = {
.badblock_pattern = &sharpsl_bbt,
.partitions = sharpsl_nand_partitions,
.nr_partitions = ARRAY_SIZE(sharpsl_nand_partitions),
};

static struct resource sharpsl_nand_resources[] = {
{
.start = 0x0C000000,
Expand All @@ -319,10 +312,27 @@ static struct platform_device sharpsl_nand_device = {
.id = -1,
.resource = sharpsl_nand_resources,
.num_resources = ARRAY_SIZE(sharpsl_nand_resources),
.dev.platform_data = &sharpsl_nand_platform_data,
};

static int __init sharpsl_nand_init(void)
{
if (machine_is_poodle()) {
sharpsl_nand_partitions[1].size = 22 * 1024 * 1024;
} else if (machine_is_corgi() || machine_is_shepherd()) {
sharpsl_nand_partitions[1].size = 25 * 1024 * 1024;
} else if (machine_is_husky()) {
sharpsl_nand_partitions[1].size = 53 * 1024 * 1024;
} else if (machine_is_spitz()) {
sharpsl_nand_partitions[1].size = 5 * 1024 * 1024;
} else if (machine_is_akita()) {
sharpsl_nand_partitions[1].size = 58 * 1024 * 1024;
sharpsl_nand_platform_data.badblock_pattern = &sharpsl_akita_bbt;
sharpsl_nand_platform_data.ecc_layout = &akita_oobinfo;
} else if (machine_is_borzoi()) {
sharpsl_nand_partitions[1].size = 32 * 1024 * 1024;
}

platform_device_register(&sharpsl_nand_device);
return platform_driver_register(&sharpsl_nand_driver);
}
Expand Down
20 changes: 20 additions & 0 deletions include/linux/mtd/sharpsl.h
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
/*
* SharpSL NAND support
*
* Copyright (C) 2008 Dmitry Baryshkov
*
* 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.
*/

#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>

struct sharpsl_nand_platform_data {
struct nand_bbt_descr *badblock_pattern;
struct nand_ecclayout *ecc_layout;
struct mtd_partition *partitions;
unsigned int nr_partitions;
};

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