diff options
Diffstat (limited to 'drivers/mtd/nand/sharpsl.c')
| -rw-r--r-- | drivers/mtd/nand/sharpsl.c | 297 |
1 files changed, 132 insertions, 165 deletions
diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c index 88b5b5b40b4..e81059b5838 100644 --- a/drivers/mtd/nand/sharpsl.c +++ b/drivers/mtd/nand/sharpsl.c @@ -2,8 +2,7 @@ * drivers/mtd/nand/sharpsl.c * * Copyright (C) 2004 Richard Purdie - * - * $Id: sharpsl.c,v 1.4 2005/01/23 11:09:19 rpurdie Exp $ + * Copyright (C) 2008 Dmitry Baryshkov * * Based on Sharp's NAND driver sharp_sl.c * @@ -21,22 +20,31 @@ #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> + #include <asm/io.h> -#include <asm/hardware.h> +#include <mach/hardware.h> #include <asm/mach-types.h> -static void __iomem *sharpsl_io_base; -static int sharpsl_phys_base = 0x0C000000; +struct sharpsl_nand { + struct mtd_info mtd; + struct nand_chip chip; + + void __iomem *io; +}; + +#define mtd_to_sharpsl(_mtd) container_of(_mtd, struct sharpsl_nand, mtd) /* register offset */ -#define ECCLPLB sharpsl_io_base+0x00 /* line parity 7 - 0 bit */ -#define ECCLPUB sharpsl_io_base+0x04 /* line parity 15 - 8 bit */ -#define ECCCP sharpsl_io_base+0x08 /* column parity 5 - 0 bit */ -#define ECCCNTR sharpsl_io_base+0x0C /* ECC byte counter */ -#define ECCCLRR sharpsl_io_base+0x10 /* cleare ECC */ -#define FLASHIO sharpsl_io_base+0x14 /* Flash I/O */ -#define FLASHCTL sharpsl_io_base+0x18 /* Flash Control */ +#define ECCLPLB 0x00 /* line parity 7 - 0 bit */ +#define ECCLPUB 0x04 /* line parity 15 - 8 bit */ +#define ECCCP 0x08 /* column parity 5 - 0 bit */ +#define ECCCNTR 0x0C /* ECC byte counter */ +#define ECCCLRR 0x10 /* cleare ECC */ +#define FLASHIO 0x14 /* Flash I/O */ +#define FLASHCTL 0x18 /* Flash Control */ /* Flash control bit */ #define FLRYBY (1 << 5) @@ -46,220 +54,179 @@ static int sharpsl_phys_base = 0x0C000000; #define FLCLE (1 << 1) #define FLCE0 (1 << 0) - /* - * MTD structure for SharpSL - */ -static struct mtd_info *sharpsl_mtd = NULL; - -/* - * Define partitions for flash device - */ -#define DEFAULT_NUM_PARTITIONS 3 - -static int nr_partitions; -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 , - }, -}; - -/* * hardware specific access to control-lines + * ctrl: + * NAND_CNE: bit 0 -> ! bit 0 & 4 + * NAND_CLE: bit 1 -> bit 1 + * NAND_ALE: bit 2 -> bit 2 + * */ -static void -sharpsl_nand_hwcontrol(struct mtd_info* mtd, int cmd) +static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd, + unsigned int ctrl) { - switch (cmd) { - case NAND_CTL_SETCLE: - writeb(readb(FLASHCTL) | FLCLE, FLASHCTL); - break; - case NAND_CTL_CLRCLE: - writeb(readb(FLASHCTL) & ~FLCLE, FLASHCTL); - break; - - case NAND_CTL_SETALE: - writeb(readb(FLASHCTL) | FLALE, FLASHCTL); - break; - case NAND_CTL_CLRALE: - writeb(readb(FLASHCTL) & ~FLALE, FLASHCTL); - break; - - case NAND_CTL_SETNCE: - writeb(readb(FLASHCTL) & ~(FLCE0|FLCE1), FLASHCTL); - break; - case NAND_CTL_CLRNCE: - writeb(readb(FLASHCTL) | (FLCE0|FLCE1), FLASHCTL); - break; - } -} + struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); + struct nand_chip *chip = mtd->priv; -static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; + if (ctrl & NAND_CTRL_CHANGE) { + unsigned char bits = ctrl & 0x07; -static struct nand_bbt_descr sharpsl_bbt = { - .options = 0, - .offs = 4, - .len = 2, - .pattern = scan_ff_pattern -}; + bits |= (ctrl & 0x01) << 4; -static int -sharpsl_nand_dev_ready(struct mtd_info* mtd) -{ - return !((readb(FLASHCTL) & FLRYBY) == 0); + bits ^= 0x11; + + writeb((readb(sharpsl->io + FLASHCTL) & ~0x17) | bits, sharpsl->io + FLASHCTL); + } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, chip->IO_ADDR_W); } -static void -sharpsl_nand_enable_hwecc(struct mtd_info* mtd, int mode) +static int sharpsl_nand_dev_ready(struct mtd_info *mtd) { - writeb(0 ,ECCCLRR); + struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); + return !((readb(sharpsl->io + FLASHCTL) & FLRYBY) == 0); } -static int -sharpsl_nand_calculate_ecc(struct mtd_info* mtd, const u_char* dat, - u_char* ecc_code) +static void sharpsl_nand_enable_hwecc(struct mtd_info *mtd, int mode) { - ecc_code[0] = ~readb(ECCLPUB); - ecc_code[1] = ~readb(ECCLPLB); - ecc_code[2] = (~readb(ECCCP) << 2) | 0x03; - return readb(ECCCNTR) != 0; + struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); + writeb(0, sharpsl->io + ECCCLRR); } - -#ifdef CONFIG_MTD_PARTITIONS -const char *part_probes[] = { "cmdlinepart", NULL }; -#endif - +static int sharpsl_nand_calculate_ecc(struct mtd_info *mtd, const u_char * dat, u_char * ecc_code) +{ + struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); + ecc_code[0] = ~readb(sharpsl->io + ECCLPUB); + ecc_code[1] = ~readb(sharpsl->io + ECCLPLB); + ecc_code[2] = (~readb(sharpsl->io + ECCCP) << 2) | 0x03; + return readb(sharpsl->io + ECCCNTR) != 0; +} /* * Main initialization routine */ -int __init -sharpsl_nand_init(void) +static int sharpsl_nand_probe(struct platform_device *pdev) { struct nand_chip *this; - struct mtd_partition* sharpsl_partition_info; + struct resource *r; int err = 0; + struct sharpsl_nand *sharpsl; + struct sharpsl_nand_platform_data *data = dev_get_platdata(&pdev->dev); + + if (!data) { + dev_err(&pdev->dev, "no platform data!\n"); + return -EINVAL; + } /* Allocate memory for MTD device structure and private data */ - sharpsl_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), - GFP_KERNEL); - if (!sharpsl_mtd) { - printk ("Unable to allocate SharpSL NAND MTD device structure.\n"); + sharpsl = kzalloc(sizeof(struct sharpsl_nand), GFP_KERNEL); + if (!sharpsl) return -ENOMEM; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + dev_err(&pdev->dev, "no io memory resource defined!\n"); + err = -ENODEV; + goto err_get_res; } - - /* map physical adress */ - sharpsl_io_base = ioremap(sharpsl_phys_base, 0x1000); - if(!sharpsl_io_base){ - printk("ioremap to access Sharp SL NAND chip failed\n"); - kfree(sharpsl_mtd); - return -EIO; + + /* map physical address */ + sharpsl->io = ioremap(r->start, resource_size(r)); + if (!sharpsl->io) { + dev_err(&pdev->dev, "ioremap to access Sharp SL NAND chip failed\n"); + err = -EIO; + goto err_ioremap; } - - /* Get pointer to private data */ - this = (struct nand_chip *) (&sharpsl_mtd[1]); - /* Initialize structures */ - memset((char *) sharpsl_mtd, 0, sizeof(struct mtd_info)); - memset((char *) this, 0, sizeof(struct nand_chip)); + /* Get pointer to private data */ + this = (struct nand_chip *)(&sharpsl->chip); /* Link the private data with the MTD structure */ - sharpsl_mtd->priv = this; + sharpsl->mtd.priv = this; + sharpsl->mtd.owner = THIS_MODULE; + + platform_set_drvdata(pdev, sharpsl); /* * PXA initialize */ - writeb(readb(FLASHCTL) | FLWP, FLASHCTL); + writeb(readb(sharpsl->io + FLASHCTL) | FLWP, sharpsl->io + FLASHCTL); /* Set address of NAND IO lines */ - this->IO_ADDR_R = FLASHIO; - this->IO_ADDR_W = FLASHIO; + this->IO_ADDR_R = sharpsl->io + FLASHIO; + this->IO_ADDR_W = sharpsl->io + FLASHIO; /* Set address of hardware control function */ - this->hwcontrol = sharpsl_nand_hwcontrol; + this->cmd_ctrl = sharpsl_nand_hwcontrol; this->dev_ready = sharpsl_nand_dev_ready; /* 15 us command delay time */ this->chip_delay = 15; /* set eccmode using hardware ECC */ - this->eccmode = NAND_ECC_HW3_256; - this->enable_hwecc = sharpsl_nand_enable_hwecc; - this->calculate_ecc = sharpsl_nand_calculate_ecc; - this->correct_data = nand_correct_data; - this->badblock_pattern = &sharpsl_bbt; + this->ecc.mode = NAND_ECC_HW; + this->ecc.size = 256; + this->ecc.bytes = 3; + this->ecc.strength = 1; + 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; /* Scan to find existence of the device */ - err=nand_scan(sharpsl_mtd,1); - if (err) { - iounmap(sharpsl_io_base); - kfree(sharpsl_mtd); - return err; - } + err = nand_scan(&sharpsl->mtd, 1); + if (err) + goto err_scan; /* Register the partitions */ - sharpsl_mtd->name = "sharpsl-nand"; - nr_partitions = parse_mtd_partitions(sharpsl_mtd, part_probes, - &sharpsl_partition_info, 0); - - if (nr_partitions <= 0) { - nr_partitions = DEFAULT_NUM_PARTITIONS; - sharpsl_partition_info = sharpsl_nand_default_partition_info; - if (machine_is_poodle()) { - sharpsl_partition_info[1].size=30 * 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; - } - } - - if (machine_is_husky() || machine_is_borzoi()) { - /* Need to use small eraseblock size for backward compatibility */ - sharpsl_mtd->flags |= MTD_NO_VIRTBLOCKS; - } + sharpsl->mtd.name = "sharpsl-nand"; - add_mtd_partitions(sharpsl_mtd, sharpsl_partition_info, nr_partitions); + err = mtd_device_parse_register(&sharpsl->mtd, NULL, NULL, + data->partitions, data->nr_partitions); + if (err) + goto err_add; /* Return happy */ return 0; + +err_add: + nand_release(&sharpsl->mtd); + +err_scan: + iounmap(sharpsl->io); +err_ioremap: +err_get_res: + kfree(sharpsl); + return err; } -module_init(sharpsl_nand_init); /* * Clean up routine */ -#ifdef MODULE -static void __exit sharpsl_nand_cleanup(void) +static int sharpsl_nand_remove(struct platform_device *pdev) { - struct nand_chip *this = (struct nand_chip *) &sharpsl_mtd[1]; + struct sharpsl_nand *sharpsl = platform_get_drvdata(pdev); /* Release resources, unregister device */ - nand_release(sharpsl_mtd); + nand_release(&sharpsl->mtd); - iounmap(sharpsl_io_base); + iounmap(sharpsl->io); /* Free the MTD device structure */ - kfree(sharpsl_mtd); + kfree(sharpsl); + + return 0; } -module_exit(sharpsl_nand_cleanup); -#endif + +static struct platform_driver sharpsl_nand_driver = { + .driver = { + .name = "sharpsl-nand", + .owner = THIS_MODULE, + }, + .probe = sharpsl_nand_probe, + .remove = sharpsl_nand_remove, +}; + +module_platform_driver(sharpsl_nand_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); |