mirror of https://gitee.com/openkylin/linux.git
[MTD] sharpsl-nand: use platform_data for model-specific values
Add platform_data which holds all model-specific values, like badblocks pattern, oobinfo, partitions. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
This commit is contained in:
Dmitry Baryshkov
parent
c176d0ca8b
commit
a20c7ab570
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@ -20,6 +20,7 @@
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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/mtd/partitions.h>
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#include <linux/mtd/sharpsl.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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@ -53,31 +54,6 @@ struct sharpsl_nand {
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#define FLCLE (1 << 1)
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#define FLCE0 (1 << 0)
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#ifdef CONFIG_MTD_PARTITIONS
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/*
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* Define partitions for flash device
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*/
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#define DEFAULT_NUM_PARTITIONS 3
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static struct mtd_partition sharpsl_nand_default_partition_info[] = {
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{
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.name = "System Area",
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.offset = 0,
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.size = 7 * 1024 * 1024,
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},
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{
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.name = "Root Filesystem",
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.offset = 7 * 1024 * 1024,
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.size = 30 * 1024 * 1024,
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},
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{
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.name = "Home Filesystem",
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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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#endif
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/*
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* hardware specific access to control-lines
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* ctrl:
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@ -106,31 +82,6 @@ static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd,
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writeb(cmd, chip->IO_ADDR_W);
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}
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static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
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static struct nand_bbt_descr sharpsl_bbt = {
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.options = 0,
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.offs = 4,
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.len = 2,
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.pattern = scan_ff_pattern
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};
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static struct nand_bbt_descr sharpsl_akita_bbt = {
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.options = 0,
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.offs = 4,
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.len = 1,
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.pattern = scan_ff_pattern
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};
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static struct nand_ecclayout akita_oobinfo = {
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.eccbytes = 24,
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.eccpos = {
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0x5, 0x1, 0x2, 0x3, 0x6, 0x7, 0x15, 0x11,
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0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
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0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},
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.oobfree = {{0x08, 0x09}}
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};
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static int sharpsl_nand_dev_ready(struct mtd_info *mtd)
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{
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struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd);
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@ -169,6 +120,12 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
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struct resource *r;
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int err = 0;
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struct sharpsl_nand *sharpsl;
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struct sharpsl_nand_platform_data *data = pdev->dev.platform_data;
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if (!data) {
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dev_err(&pdev->dev, "no platform data!\n");
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return -EINVAL;
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}
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/* Allocate memory for MTD device structure and private data */
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sharpsl = kzalloc(sizeof(struct sharpsl_nand), GFP_KERNEL);
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@ -218,11 +175,8 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
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this->ecc.mode = NAND_ECC_HW;
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this->ecc.size = 256;
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this->ecc.bytes = 3;
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this->badblock_pattern = &sharpsl_bbt;
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if (machine_is_akita() || machine_is_borzoi()) {
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this->badblock_pattern = &sharpsl_akita_bbt;
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this->ecc.layout = &akita_oobinfo;
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}
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this->badblock_pattern = data->badblock_pattern;
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this->ecc.layout = data->ecc_layout;
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this->ecc.hwctl = sharpsl_nand_enable_hwecc;
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this->ecc.calculate = sharpsl_nand_calculate_ecc;
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this->ecc.correct = nand_correct_data;
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@ -236,29 +190,16 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
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sharpsl->mtd.name = "sharpsl-nand";
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#ifdef CONFIG_MTD_PARTITIONS
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nr_partitions = parse_mtd_partitions(&sharpsl->mtd, part_probes, &sharpsl_partition_info, 0);
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if (nr_partitions <= 0) {
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nr_partitions = ARRAY_SIZE(sharpsl_nand_default_partition_info);
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sharpsl_partition_info = sharpsl_nand_default_partition_info;
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if (machine_is_poodle()) {
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sharpsl_partition_info[1].size = 22 * 1024 * 1024;
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} else if (machine_is_corgi() || machine_is_shepherd()) {
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sharpsl_partition_info[1].size = 25 * 1024 * 1024;
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} else if (machine_is_husky()) {
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sharpsl_partition_info[1].size = 53 * 1024 * 1024;
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} else if (machine_is_spitz()) {
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sharpsl_partition_info[1].size = 5 * 1024 * 1024;
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} else if (machine_is_akita()) {
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sharpsl_partition_info[1].size = 58 * 1024 * 1024;
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} else if (machine_is_borzoi()) {
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sharpsl_partition_info[1].size = 32 * 1024 * 1024;
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}
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nr_partitions = data->nr_partitions;
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sharpsl_partition_info = data->partitions;
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}
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err = add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
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#else
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err = add_mtd_device(&sharpsl->mtd);
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if (nr_partitions > 0)
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err = add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
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else
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#endif
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err = add_mtd_device(&sharpsl->mtd);
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if (err)
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goto err_add;
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@ -306,6 +247,58 @@ static struct platform_driver sharpsl_nand_driver = {
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.remove = __devexit_p(sharpsl_nand_remove),
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};
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/*
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* Define partitions for flash device
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*/
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static struct mtd_partition sharpsl_nand_partitions[] = {
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{
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.name = "System Area",
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.offset = 0,
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.size = 7 * 1024 * 1024,
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},
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{
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.name = "Root Filesystem",
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.offset = 7 * 1024 * 1024,
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.size = 30 * 1024 * 1024,
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},
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{
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.name = "Home Filesystem",
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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 uint8_t scan_ff_pattern[] = { 0xff, 0xff };
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static struct nand_bbt_descr sharpsl_bbt = {
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.options = 0,
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.offs = 4,
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.len = 2,
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.pattern = scan_ff_pattern
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};
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static struct nand_bbt_descr sharpsl_akita_bbt = {
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.options = 0,
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.offs = 4,
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.len = 1,
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.pattern = scan_ff_pattern
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};
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static struct nand_ecclayout akita_oobinfo = {
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.eccbytes = 24,
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.eccpos = {
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0x5, 0x1, 0x2, 0x3, 0x6, 0x7, 0x15, 0x11,
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0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
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0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},
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.oobfree = {{0x08, 0x09}}
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};
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static struct sharpsl_nand_platform_data sharpsl_nand_platform_data = {
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.badblock_pattern = &sharpsl_bbt,
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.partitions = sharpsl_nand_partitions,
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.nr_partitions = ARRAY_SIZE(sharpsl_nand_partitions),
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};
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static struct resource sharpsl_nand_resources[] = {
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{
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.start = 0x0C000000,
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@ -319,10 +312,27 @@ static struct platform_device sharpsl_nand_device = {
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.id = -1,
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.resource = sharpsl_nand_resources,
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.num_resources = ARRAY_SIZE(sharpsl_nand_resources),
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.dev.platform_data = &sharpsl_nand_platform_data,
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};
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static int __init sharpsl_nand_init(void)
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{
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if (machine_is_poodle()) {
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sharpsl_nand_partitions[1].size = 22 * 1024 * 1024;
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} else if (machine_is_corgi() || machine_is_shepherd()) {
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sharpsl_nand_partitions[1].size = 25 * 1024 * 1024;
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} else if (machine_is_husky()) {
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sharpsl_nand_partitions[1].size = 53 * 1024 * 1024;
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} else if (machine_is_spitz()) {
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sharpsl_nand_partitions[1].size = 5 * 1024 * 1024;
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} else if (machine_is_akita()) {
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sharpsl_nand_partitions[1].size = 58 * 1024 * 1024;
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sharpsl_nand_platform_data.badblock_pattern = &sharpsl_akita_bbt;
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sharpsl_nand_platform_data.ecc_layout = &akita_oobinfo;
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} else if (machine_is_borzoi()) {
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sharpsl_nand_partitions[1].size = 32 * 1024 * 1024;
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}
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platform_device_register(&sharpsl_nand_device);
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return platform_driver_register(&sharpsl_nand_driver);
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}
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@ -0,0 +1,20 @@
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/*
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* SharpSL NAND support
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*
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* Copyright (C) 2008 Dmitry Baryshkov
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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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/mtd/partitions.h>
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struct sharpsl_nand_platform_data {
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struct nand_bbt_descr *badblock_pattern;
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struct nand_ecclayout *ecc_layout;
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struct mtd_partition *partitions;
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unsigned int nr_partitions;
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};
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