-# For a description of the syntax of this configuration file,
-# see Documentation/kbuild/kconfig-language.txt.
-#
-
-mainmenu "Linux/PowerPC Kernel Configuration"
-
source "arch/powerpc/platforms/Kconfig.cputype"
config PPC32
bool
config FSL_LBC
- bool
+ bool "Freescale Local Bus support"
+ depends on FSL_SOC
help
- Freescale Localbus support
+ Enables reporting of errors from the Freescale local bus
+ controller. Also contains some common code used by
+ drivers for specific local bus peripherals.
config FSL_GTM
bool
#include <linux/backing-dev.h>
#include <linux/compat.h>
#include <linux/mount.h>
-
+ #include <linux/blkpg.h>
#include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
#include <linux/mtd/map.h>
#include <asm/uaccess.h>
return ret;
}
+ /*
+ * Copies (and truncates, if necessary) data from the larger struct,
+ * nand_ecclayout, to the smaller, deprecated layout struct,
+ * nand_ecclayout_user. This is necessary only to suppport the deprecated
+ * API ioctl ECCGETLAYOUT while allowing all new functionality to use
+ * nand_ecclayout flexibly (i.e. the struct may change size in new
+ * releases without requiring major rewrites).
+ */
+ static int shrink_ecclayout(const struct nand_ecclayout *from,
+ struct nand_ecclayout_user *to)
+ {
+ int i;
+
+ if (!from || !to)
+ return -EINVAL;
+
+ memset(to, 0, sizeof(*to));
+
+ to->eccbytes = min((int)from->eccbytes, MTD_MAX_ECCPOS_ENTRIES);
+ for (i = 0; i < to->eccbytes; i++)
+ to->eccpos[i] = from->eccpos[i];
+
+ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++) {
+ if (from->oobfree[i].length == 0 &&
+ from->oobfree[i].offset == 0)
+ break;
+ to->oobavail += from->oobfree[i].length;
+ to->oobfree[i] = from->oobfree[i];
+ }
+
+ return 0;
+ }
+
+ #ifdef CONFIG_MTD_PARTITIONS
+ static int mtd_blkpg_ioctl(struct mtd_info *mtd,
+ struct blkpg_ioctl_arg __user *arg)
+ {
+ struct blkpg_ioctl_arg a;
+ struct blkpg_partition p;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ /* Only master mtd device must be used to control partitions */
+ if (!mtd_is_master(mtd))
+ return -EINVAL;
+
+ if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg)))
+ return -EFAULT;
+
+ if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition)))
+ return -EFAULT;
+
+ switch (a.op) {
+ case BLKPG_ADD_PARTITION:
+
+ return mtd_add_partition(mtd, p.devname, p.start, p.length);
+
+ case BLKPG_DEL_PARTITION:
+
+ if (p.pno < 0)
+ return -EINVAL;
+
+ return mtd_del_partition(mtd, p.pno);
+
+ default:
+ return -EINVAL;
+ }
+ }
+ #endif
+
+
static int mtd_ioctl(struct file *file, u_int cmd, u_long arg)
{
struct mtd_file_info *mfi = file->private_data;
if (get_user(ur_idx, &(ur->regionindex)))
return -EFAULT;
+ if (ur_idx >= mtd->numeraseregions)
+ return -EINVAL;
+
kr = &(mtd->eraseregions[ur_idx]);
if (put_user(kr->offset, &(ur->offset))
}
#endif
+ /* This ioctl is being deprecated - it truncates the ecc layout */
case ECCGETLAYOUT:
{
+ struct nand_ecclayout_user *usrlay;
+
if (!mtd->ecclayout)
return -EOPNOTSUPP;
- if (copy_to_user(argp, mtd->ecclayout,
- sizeof(struct nand_ecclayout)))
- return -EFAULT;
+ usrlay = kmalloc(sizeof(*usrlay), GFP_KERNEL);
+ if (!usrlay)
+ return -ENOMEM;
+
+ shrink_ecclayout(mtd->ecclayout, usrlay);
+
+ if (copy_to_user(argp, usrlay, sizeof(*usrlay)))
+ ret = -EFAULT;
+ kfree(usrlay);
break;
}
break;
}
+ #ifdef CONFIG_MTD_PARTITIONS
+ case BLKPG:
+ {
+ ret = mtd_blkpg_ioctl(mtd,
+ (struct blkpg_ioctl_arg __user *)arg);
+ break;
+ }
+
+ case BLKRRPART:
+ {
+ /* No reread partition feature. Just return ok */
+ ret = 0;
+ break;
+ }
+ #endif
+
default:
ret = -ENOTTY;
}
#endif
};
-static int mtd_inodefs_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data,
- struct vfsmount *mnt)
+static struct dentry *mtd_inodefs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
{
- return mount_pseudo(fs_type, "mtd_inode:", NULL, MTD_INODE_FS_MAGIC);
- return get_sb_pseudo(fs_type, "mtd_inode:", NULL, MTD_INODE_FS_MAGIC,
- mnt);
++ return mount_pseudo(fs_type, "mtd_inode:", NULL, MTD_INODE_FS_MAGIC);
}
static struct file_system_type mtd_inodefs_type = {
.name = "mtd_inodefs",
- .get_sb = mtd_inodefs_get_sb,
+ .mount = mtd_inodefs_mount,
.kill_sb = kill_anon_super,
};
#include <linux/slab.h>
#include <mach/nand.h>
+#include <mach/aemif.h>
#include <asm/mach-types.h>
uint32_t mask_cle;
uint32_t core_chipsel;
+
+ struct davinci_aemif_timing *timing;
};
static DEFINE_SPINLOCK(davinci_nand_lock);
u32 syndrome[4];
u32 ecc_state;
unsigned num_errors, corrected;
- unsigned long timeo = jiffies + msecs_to_jiffies(100);
+ unsigned long timeo;
/* All bytes 0xff? It's an erased page; ignore its ECC. */
for (i = 0; i < 10; i++) {
* after setting the 4BITECC_ADD_CALC_START bit. So if you immediately
* begin trying to poll for the state, you may fall right out of your
* loop without any of the correction calculations having taken place.
- * The recommendation from the hardware team is to wait till ECC_STATE
- * reads less than 4, which means ECC HW has entered correction state.
+ * The recommendation from the hardware team is to initially delay as
+ * long as ECC_STATE reads less than 4. After that, ECC HW has entered
+ * correction state.
*/
+ timeo = jiffies + usecs_to_jiffies(100);
do {
ecc_state = (davinci_nand_readl(info,
NANDFSR_OFFSET) >> 8) & 0x0f;
return davinci_nand_readl(info, NANDFSR_OFFSET) & BIT(0);
}
-static void __init nand_dm6446evm_flash_init(struct davinci_nand_info *info)
-{
- uint32_t regval, a1cr;
-
- /*
- * NAND FLASH timings @ PLL1 == 459 MHz
- * - AEMIF.CLK freq = PLL1/6 = 459/6 = 76.5 MHz
- * - AEMIF.CLK period = 1/76.5 MHz = 13.1 ns
- */
- regval = 0
- | (0 << 31) /* selectStrobe */
- | (0 << 30) /* extWait (never with NAND) */
- | (1 << 26) /* writeSetup 10 ns */
- | (3 << 20) /* writeStrobe 40 ns */
- | (1 << 17) /* writeHold 10 ns */
- | (0 << 13) /* readSetup 10 ns */
- | (3 << 7) /* readStrobe 60 ns */
- | (0 << 4) /* readHold 10 ns */
- | (3 << 2) /* turnAround ?? ns */
- | (0 << 0) /* asyncSize 8-bit bus */
- ;
- a1cr = davinci_nand_readl(info, A1CR_OFFSET);
- if (a1cr != regval) {
- dev_dbg(info->dev, "Warning: NAND config: Set A1CR " \
- "reg to 0x%08x, was 0x%08x, should be done by " \
- "bootloader.\n", regval, a1cr);
- davinci_nand_writel(info, A1CR_OFFSET, regval);
- }
-}
-
/*----------------------------------------------------------------------*/
/* An ECC layout for using 4-bit ECC with small-page flash, storing
info->chip.options = pdata->options;
info->chip.bbt_td = pdata->bbt_td;
info->chip.bbt_md = pdata->bbt_md;
+ info->timing = pdata->timing;
info->ioaddr = (uint32_t __force) vaddr;
goto err_clk_enable;
}
- /* EMIF timings should normally be set by the boot loader,
- * especially after boot-from-NAND. The *only* reason to
- * have this special casing for the DM6446 EVM is to work
- * with boot-from-NOR ... with CS0 manually re-jumpered
- * (after startup) so it addresses the NAND flash, not NOR.
- * Even for dev boards, that's unusually rude...
+ /*
+ * Setup Async configuration register in case we did not boot from
+ * NAND and so bootloader did not bother to set it up.
*/
- if (machine_is_davinci_evm())
- nand_dm6446evm_flash_init(info);
+ val = davinci_nand_readl(info, A1CR_OFFSET + info->core_chipsel * 4);
+
+ /* Extended Wait is not valid and Select Strobe mode is not used */
+ val &= ~(ACR_ASIZE_MASK | ACR_EW_MASK | ACR_SS_MASK);
+ if (info->chip.options & NAND_BUSWIDTH_16)
+ val |= 0x1;
+
+ davinci_nand_writel(info, A1CR_OFFSET + info->core_chipsel * 4, val);
+
+ ret = davinci_aemif_setup_timing(info->timing, info->base,
+ info->core_chipsel);
+ if (ret < 0) {
+ dev_dbg(&pdev->dev, "NAND timing values setup fail\n");
+ goto err_timing;
+ }
spin_lock_irq(&davinci_nand_lock);
* breaks userspace ioctl interface with mtd-utils. Once we
* resolve this issue, NAND_ECC_HW_OOB_FIRST mode can be used
* for the 4KiB page chips.
+ *
+ * TODO: Note that nand_ecclayout has now been expanded and can
+ * hold plenty of OOB entries.
*/
dev_warn(&pdev->dev, "no 4-bit ECC support yet "
"for 4KiB-page NAND\n");
return 0;
err_scan:
+err_timing:
clk_disable(info->clk);
err_clk_enable:
mutex_unlock(&f->sem);
d_instantiate(dentry, old_dentry->d_inode);
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
- atomic_inc(&old_dentry->d_inode->i_count);
+ ihold(old_dentry->d_inode);
}
return ret;
}
}
/* We use f->target field to store the target path. */
- f->target = kmalloc(targetlen + 1, GFP_KERNEL);
+ f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
if (!f->target) {
printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
mutex_unlock(&f->sem);
goto fail;
}
- memcpy(f->target, target, targetlen + 1);
D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
/* No data here. Only a metadata node, which will be
printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
/* Might as well let the VFS know */
d_instantiate(new_dentry, old_dentry->d_inode);
- atomic_inc(&old_dentry->d_inode->i_count);
+ ihold(old_dentry->d_inode);
new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
return ret;
}
git.openpandora.org / pandora-kernel.git / commitdiff