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author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-20 21:50:31 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-20 21:50:31 (GMT) |
commit | be967b7e2f7747a5ebf2a07ee627d9338491e784 (patch) | |
tree | f42b82601209a52b8ee478e36d8b21543ab03060 /drivers/mtd/nand/toto.c | |
parent | eef11427edcb821b63920219f89379fab84198b9 (diff) | |
parent | 7bc3312bef4d6f220812500c0de7868fb7625a41 (diff) | |
download | linux-fsl-qoriq-be967b7e2f7747a5ebf2a07ee627d9338491e784.tar.xz |
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (199 commits)
[MTD] NAND: Fix breakage all over the place
[PATCH] NAND: fix remaining OOB length calculation
[MTD] NAND Fixup NDFC merge brokeness
[MTD NAND] S3C2410 driver cleanup
[MTD NAND] s3c24x0 board: Fix clock handling, ensure proper initialisation.
[JFFS2] Check CRC32 on dirent and data nodes each time they're read
[JFFS2] When retiring nextblock, allocate a node_ref for the wasted space
[JFFS2] Mark XATTR support as experimental, for now
[JFFS2] Don't trust node headers before the CRC is checked.
[MTD] Restore MTD_ROM and MTD_RAM types
[MTD] assume mtd->writesize is 1 for NOR flashes
[MTD NAND] Fix s3c2410 NAND driver so it at least _looks_ like it compiles
[MTD] Prepare physmap for 64-bit-resources
[JFFS2] Fix more breakage caused by janitorial meddling.
[JFFS2] Remove stray __exit from jffs2_compressors_exit()
[MTD] Allow alternate JFFS2 mount variant for root filesystem.
[MTD] Disconnect struct mtd_info from ABI
[MTD] replace MTD_RAM with MTD_GENERIC_TYPE
[MTD] replace MTD_ROM with MTD_GENERIC_TYPE
[MTD] remove a forgotten MTD_XIP
...
Diffstat (limited to 'drivers/mtd/nand/toto.c')
-rw-r--r-- | drivers/mtd/nand/toto.c | 121 |
1 files changed, 62 insertions, 59 deletions
diff --git a/drivers/mtd/nand/toto.c b/drivers/mtd/nand/toto.c index 7609c43..f9e2d4a 100644 --- a/drivers/mtd/nand/toto.c +++ b/drivers/mtd/nand/toto.c @@ -32,6 +32,8 @@ #include <asm/arch-omap1510/hardware.h> #include <asm/arch/gpio.h> +#define CONFIG_NAND_WORKAROUND 1 + /* * MTD structure for TOTO board */ @@ -39,25 +41,6 @@ static struct mtd_info *toto_mtd = NULL; static unsigned long toto_io_base = OMAP_FLASH_1_BASE; -#define CONFIG_NAND_WORKAROUND 1 - -#define NAND_NCE 0x4000 -#define NAND_CLE 0x1000 -#define NAND_ALE 0x0002 -#define NAND_MASK (NAND_CLE | NAND_ALE | NAND_NCE) - -#define T_NAND_CTL_CLRALE(iob) gpiosetout(NAND_ALE, 0) -#define T_NAND_CTL_SETALE(iob) gpiosetout(NAND_ALE, NAND_ALE) -#ifdef CONFIG_NAND_WORKAROUND /* "some" dev boards busted, blue wired to rts2 :( */ -#define T_NAND_CTL_CLRCLE(iob) gpiosetout(NAND_CLE, 0); rts2setout(2, 2) -#define T_NAND_CTL_SETCLE(iob) gpiosetout(NAND_CLE, NAND_CLE); rts2setout(2, 0) -#else -#define T_NAND_CTL_CLRCLE(iob) gpiosetout(NAND_CLE, 0) -#define T_NAND_CTL_SETCLE(iob) gpiosetout(NAND_CLE, NAND_CLE) -#endif -#define T_NAND_CTL_SETNCE(iob) gpiosetout(NAND_NCE, 0) -#define T_NAND_CTL_CLRNCE(iob) gpiosetout(NAND_NCE, NAND_NCE) - /* * Define partitions for flash devices */ @@ -91,91 +74,110 @@ static struct mtd_partition partition_info32M[] = { #define NUM_PARTITIONS32M 3 #define NUM_PARTITIONS64M 4 + /* * hardware specific access to control-lines -*/ - -static void toto_hwcontrol(struct mtd_info *mtd, int cmd) + * + * ctrl: + * NAND_NCE: bit 0 -> bit 14 (0x4000) + * NAND_CLE: bit 1 -> bit 12 (0x1000) + * NAND_ALE: bit 2 -> bit 1 (0x0002) + */ +static void toto_hwcontrol(struct mtd_info *mtd, int cmd, + unsigned int ctrl) { + struct nand_chip *chip = mtd->priv; + + if (ctrl & NAND_CTRL_CHANGE) { + unsigned long bits; - udelay(1); /* hopefully enough time for tc make proceding write to clear */ - switch(cmd){ + /* hopefully enough time for tc make proceding write to clear */ + udelay(1); - case NAND_CTL_SETCLE: T_NAND_CTL_SETCLE(cmd); break; - case NAND_CTL_CLRCLE: T_NAND_CTL_CLRCLE(cmd); break; + bits = (~ctrl & NAND_NCE) << 14; + bits |= (ctrl & NAND_CLE) << 12; + bits |= (ctrl & NAND_ALE) >> 1; - case NAND_CTL_SETALE: T_NAND_CTL_SETALE(cmd); break; - case NAND_CTL_CLRALE: T_NAND_CTL_CLRALE(cmd); break; +#warning Wild guess as gpiosetout() is nowhere defined in the kernel source - tglx + gpiosetout(0x5002, bits); - case NAND_CTL_SETNCE: T_NAND_CTL_SETNCE(cmd); break; - case NAND_CTL_CLRNCE: T_NAND_CTL_CLRNCE(cmd); break; +#ifdef CONFIG_NAND_WORKAROUND + /* "some" dev boards busted, blue wired to rts2 :( */ + rts2setout(2, (ctrl & NAND_CLE) << 1); +#endif + /* allow time to ensure gpio state to over take memory write */ + udelay(1); } - udelay(1); /* allow time to ensure gpio state to over take memory write */ + + if (cmd != NAND_CMD_NONE) + writeb(cmd, chip->IO_ADDR_W); } /* * Main initialization routine */ -int __init toto_init (void) +static int __init toto_init(void) { struct nand_chip *this; int err = 0; /* Allocate memory for MTD device structure and private data */ - toto_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip), - GFP_KERNEL); + toto_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); if (!toto_mtd) { - printk (KERN_WARNING "Unable to allocate toto NAND MTD device structure.\n"); + printk(KERN_WARNING "Unable to allocate toto NAND MTD device structure.\n"); err = -ENOMEM; goto out; } /* Get pointer to private data */ - this = (struct nand_chip *) (&toto_mtd[1]); + this = (struct nand_chip *)(&toto_mtd[1]); /* Initialize structures */ - memset((char *) toto_mtd, 0, sizeof(struct mtd_info)); - memset((char *) this, 0, sizeof(struct nand_chip)); + memset(toto_mtd, 0, sizeof(struct mtd_info)); + memset(this, 0, sizeof(struct nand_chip)); /* Link the private data with the MTD structure */ toto_mtd->priv = this; + toto_mtd->owner = THIS_MODULE; /* Set address of NAND IO lines */ this->IO_ADDR_R = toto_io_base; this->IO_ADDR_W = toto_io_base; - this->hwcontrol = toto_hwcontrol; + this->cmd_ctrl = toto_hwcontrol; this->dev_ready = NULL; /* 25 us command delay time */ this->chip_delay = 30; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; - /* Scan to find existance of the device */ - if (nand_scan (toto_mtd, 1)) { + /* Scan to find existance of the device */ + if (nand_scan(toto_mtd, 1)) { err = -ENXIO; goto out_mtd; } /* Register the partitions */ - switch(toto_mtd->size){ - case SZ_64M: add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M); break; - case SZ_32M: add_mtd_partitions(toto_mtd, partition_info32M, NUM_PARTITIONS32M); break; - default: { - printk (KERN_WARNING "Unsupported Nand device\n"); + switch (toto_mtd->size) { + case SZ_64M: + add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M); + break; + case SZ_32M: + add_mtd_partitions(toto_mtd, partition_info32M, NUM_PARTITIONS32M); + break; + default:{ + printk(KERN_WARNING "Unsupported Nand device\n"); err = -ENXIO; goto out_buf; } } - gpioreserve(NAND_MASK); /* claim our gpios */ - archflashwp(0,0); /* open up flash for writing */ + gpioreserve(NAND_MASK); /* claim our gpios */ + archflashwp(0, 0); /* open up flash for writing */ goto out; -out_buf: - kfree (this->data_buf); -out_mtd: - kfree (toto_mtd); -out: + out_mtd: + kfree(toto_mtd); + out: return err; } @@ -184,20 +186,21 @@ module_init(toto_init); /* * Clean up routine */ -static void __exit toto_cleanup (void) +static void __exit toto_cleanup(void) { /* Release resources, unregister device */ - nand_release (toto_mtd); + nand_release(toto_mtd); /* Free the MTD device structure */ - kfree (toto_mtd); + kfree(toto_mtd); /* stop flash writes */ - archflashwp(0,1); + archflashwp(0, 1); /* release gpios to system */ - gpiorelease(NAND_MASK); + gpiorelease(NAND_MASK); } + module_exit(toto_cleanup); MODULE_LICENSE("GPL"); |