Merge git://git.infradead.org/mtd-2.6

* git://git.infradead.org/mtd-2.6: (82 commits)
  mtd: fix build error in m25p80.c
  mtd: Remove redundant mutex from mtd_blkdevs.c
  MTD: Fix wrong check register_blkdev return value
  Revert "mtd: cleanup Kconfig dependencies"
  mtd: cfi_cmdset_0002: make sector erase command variable
  mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips
  mtd: cfi_util: add support for switching SST 39VF640xB chips into QRY mode
  mtd: cfi_cmdset_0001: use defined value of P_ID_INTEL_PERFORMANCE instead of hardcoded one
  block2mtd: dubious assignment
  P4080/mtd: Fix the freescale lbc issue with 36bit mode
  P4080/eLBC: Make Freescale elbc interrupt common to elbc devices
  mtd: phram: use KBUILD_MODNAME
  mtd: OneNAND: S5PC110: Fix double call suspend & resume function
  mtd: nand: fix MTD_MODE_RAW writes
  jffs2: use kmemdup
  mtd: sm_ftl: cosmetic, use bool when possible
  mtd: r852: remove useless pci powerup/down from suspend/resume routines
  mtd: blktrans: fix a race vs kthread_stop
  mtd: blktrans: kill BKL
  mtd: allow to unload the mtdtrans module if its block devices aren't open
  ...

Fix up trivial whitespace-introduced conflict in drivers/mtd/mtdchar.c

3 files changed, 246 insertions, 39 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c7e40b37aa65..b6447190e1a2 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -682,9 +682,12 @@ config 4xx_SOC
         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
diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h
index 1b5a21041f9b..5c1bf3466749 100644
--- a/arch/powerpc/include/asm/fsl_lbc.h
+++ b/arch/powerpc/include/asm/fsl_lbc.h
@@ -1,9 +1,10 @@
 /* Freescale Local Bus Controller
  *
- * Copyright (c) 2006-2007 Freescale Semiconductor
+ * Copyright © 2006-2007, 2010 Freescale Semiconductor
  *
  * Authors: Nick Spence <nick.spence@freescale.com>,
  *          Scott Wood <scottwood@freescale.com>
+ *          Jack Lan <jack.lan@freescale.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -26,6 +27,8 @@
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <linux/io.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
 
 struct fsl_lbc_bank {
         __be32 br;             /**< Base Register  */
@@ -125,13 +128,23 @@ struct fsl_lbc_regs {
 #define LTESR_ATMW 0x00800000
 #define LTESR_ATMR 0x00400000
 #define LTESR_CS   0x00080000
+#define LTESR_UPM  0x00000002
 #define LTESR_CC   0x00000001
 #define LTESR_NAND_MASK (LTESR_FCT | LTESR_PAR | LTESR_CC)
+#define LTESR_MASK      (LTESR_BM | LTESR_FCT | LTESR_PAR | LTESR_WP \
+                         | LTESR_ATMW | LTESR_ATMR | LTESR_CS | LTESR_UPM \
+                         | LTESR_CC)
+#define LTESR_CLEAR     0xFFFFFFFF
+#define LTECCR_CLEAR    0xFFFFFFFF
+#define LTESR_STATUS    LTESR_MASK
+#define LTEIR_ENABLE    LTESR_MASK
+#define LTEDR_ENABLE    0x00000000
         __be32 ltedr;           /**< Transfer Error Disable Register */
         __be32 lteir;           /**< Transfer Error Interrupt Register */
         __be32 lteatr;          /**< Transfer Error Attributes Register */
         __be32 ltear;           /**< Transfer Error Address Register */
-        u8 res6[0xC];
+        __be32 lteccr;          /**< Transfer Error ECC Register */
+        u8 res6[0x8];
         __be32 lbcr;            /**< Configuration Register */
 #define LBCR_LDIS  0x80000000
 #define LBCR_LDIS_SHIFT    31
@@ -235,6 +248,7 @@ struct fsl_upm {
         int width;
 };
 
+extern u32 fsl_lbc_addr(phys_addr_t addr_base);
 extern int fsl_lbc_find(phys_addr_t addr_base);
 extern int fsl_upm_find(phys_addr_t addr_base, struct fsl_upm *upm);
 
@@ -265,7 +279,23 @@ static inline void fsl_upm_end_pattern(struct fsl_upm *upm)
                 cpu_relax();
 }
 
+/* overview of the fsl lbc controller */
+
+struct fsl_lbc_ctrl {
+        /* device info */
+        struct device                   *dev;
+        struct fsl_lbc_regs __iomem     *regs;
+        int                             irq;
+        wait_queue_head_t               irq_wait;
+        spinlock_t                      lock;
+        void                            *nand;
+
+        /* status read from LTESR by irq handler */
+        unsigned int                    irq_status;
+};
+
 extern int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base,
                                u32 mar);
+extern struct fsl_lbc_ctrl *fsl_lbc_ctrl_dev;
 
 #endif /* __ASM_FSL_LBC_H */
diff --git a/arch/powerpc/sysdev/fsl_lbc.c b/arch/powerpc/sysdev/fsl_lbc.c
index dceb8d1a843d..4fcb5a4e60dd 100644
--- a/arch/powerpc/sysdev/fsl_lbc.c
+++ b/arch/powerpc/sysdev/fsl_lbc.c
@@ -1,9 +1,12 @@
 /*
  * Freescale LBC and UPM routines.
  *
- * Copyright (c) 2007-2008  MontaVista Software, Inc.
+ * Copyright © 2007-2008  MontaVista Software, Inc.
+ * Copyright © 2010 Freescale Semiconductor
  *
  * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
+ * Author: Jack Lan <Jack.Lan@freescale.com>
+ * Author: Roy Zang <tie-fei.zang@freescale.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,39 +22,37 @@
 #include <linux/types.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
 #include <asm/prom.h>
 #include <asm/fsl_lbc.h>
 
 static spinlock_t fsl_lbc_lock = __SPIN_LOCK_UNLOCKED(fsl_lbc_lock);
-static struct fsl_lbc_regs __iomem *fsl_lbc_regs;
+struct fsl_lbc_ctrl *fsl_lbc_ctrl_dev;
+EXPORT_SYMBOL(fsl_lbc_ctrl_dev);
 
-static char __initdata *compat_lbc[] = {
-        "fsl,pq2-localbus",
-        "fsl,pq2pro-localbus",
-        "fsl,pq3-localbus",
-        "fsl,elbc",
-};
-
-static int __init fsl_lbc_init(void)
+/**
+ * fsl_lbc_addr - convert the base address
+ * @addr_base:  base address of the memory bank
+ *
+ * This function converts a base address of lbc into the right format for the
+ * BR register. If the SOC has eLBC then it returns 32bit physical address
+ * else it convers a 34bit local bus physical address to correct format of
+ * 32bit address for BR register (Example: MPC8641).
+ */
+u32 fsl_lbc_addr(phys_addr_t addr_base)
 {
-        struct device_node *lbus;
-        int i;
+        struct device_node *np = fsl_lbc_ctrl_dev->dev->of_node;
+        u32 addr = addr_base & 0xffff8000;
 
-        for (i = 0; i < ARRAY_SIZE(compat_lbc); i++) {
-                lbus = of_find_compatible_node(NULL, NULL, compat_lbc[i]);
-                if (lbus)
-                        goto found;
-        }
-        return -ENODEV;
+        if (of_device_is_compatible(np, "fsl,elbc"))
+                return addr;
 
-found:
-        fsl_lbc_regs = of_iomap(lbus, 0);
-        of_node_put(lbus);
-        if (!fsl_lbc_regs)
-                return -ENOMEM;
-        return 0;
+        return addr | ((addr_base & 0x300000000ull) >> 19);
 }
-arch_initcall(fsl_lbc_init);
+EXPORT_SYMBOL(fsl_lbc_addr);
 
 /**
  * fsl_lbc_find - find Localbus bank
@@ -65,15 +66,17 @@ arch_initcall(fsl_lbc_init);
 int fsl_lbc_find(phys_addr_t addr_base)
 {
         int i;
+        struct fsl_lbc_regs __iomem *lbc;
 
-        if (!fsl_lbc_regs)
+        if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
                 return -ENODEV;
 
-        for (i = 0; i < ARRAY_SIZE(fsl_lbc_regs->bank); i++) {
-                __be32 br = in_be32(&fsl_lbc_regs->bank[i].br);
-                __be32 or = in_be32(&fsl_lbc_regs->bank[i].or);
+        lbc = fsl_lbc_ctrl_dev->regs;
+        for (i = 0; i < ARRAY_SIZE(lbc->bank); i++) {
+                __be32 br = in_be32(&lbc->bank[i].br);
+                __be32 or = in_be32(&lbc->bank[i].or);
 
-                if (br & BR_V && (br & or & BR_BA) == addr_base)
+                if (br & BR_V && (br & or & BR_BA) == fsl_lbc_addr(addr_base))
                         return i;
         }
 
@@ -94,22 +97,27 @@ int fsl_upm_find(phys_addr_t addr_base, struct fsl_upm *upm)
 {
         int bank;
         __be32 br;
+        struct fsl_lbc_regs __iomem *lbc;
 
         bank = fsl_lbc_find(addr_base);
         if (bank < 0)
                 return bank;
 
-        br = in_be32(&fsl_lbc_regs->bank[bank].br);
+        if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
+                return -ENODEV;
+
+        lbc = fsl_lbc_ctrl_dev->regs;
+        br = in_be32(&lbc->bank[bank].br);
 
         switch (br & BR_MSEL) {
         case BR_MS_UPMA:
-                upm->mxmr = &fsl_lbc_regs->mamr;
+                upm->mxmr = &lbc->mamr;
                 break;
         case BR_MS_UPMB:
-                upm->mxmr = &fsl_lbc_regs->mbmr;
+                upm->mxmr = &lbc->mbmr;
                 break;
         case BR_MS_UPMC:
-                upm->mxmr = &fsl_lbc_regs->mcmr;
+                upm->mxmr = &lbc->mcmr;
                 break;
         default:
                 return -EINVAL;
@@ -148,9 +156,12 @@ int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base, u32 mar)
         int ret = 0;
         unsigned long flags;
 
+        if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
+                return -ENODEV;
+
         spin_lock_irqsave(&fsl_lbc_lock, flags);
 
-        out_be32(&fsl_lbc_regs->mar, mar);
+        out_be32(&fsl_lbc_ctrl_dev->regs->mar, mar);
 
         switch (upm->width) {
         case 8:
@@ -172,3 +183,166 @@ int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base, u32 mar)
         return ret;
 }
 EXPORT_SYMBOL(fsl_upm_run_pattern);
+
+static int __devinit fsl_lbc_ctrl_init(struct fsl_lbc_ctrl *ctrl)
+{
+        struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
+
+        /* clear event registers */
+        setbits32(&lbc->ltesr, LTESR_CLEAR);
+        out_be32(&lbc->lteatr, 0);
+        out_be32(&lbc->ltear, 0);
+        out_be32(&lbc->lteccr, LTECCR_CLEAR);
+        out_be32(&lbc->ltedr, LTEDR_ENABLE);
+
+        /* Enable interrupts for any detected events */
+        out_be32(&lbc->lteir, LTEIR_ENABLE);
+
+        return 0;
+}
+
+/*
+ * NOTE: This interrupt is used to report localbus events of various kinds,
+ * such as transaction errors on the chipselects.
+ */
+
+static irqreturn_t fsl_lbc_ctrl_irq(int irqno, void *data)
+{
+        struct fsl_lbc_ctrl *ctrl = data;
+        struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
+        u32 status;
+
+        status = in_be32(&lbc->ltesr);
+        if (!status)
+                return IRQ_NONE;
+
+        out_be32(&lbc->ltesr, LTESR_CLEAR);
+        out_be32(&lbc->lteatr, 0);
+        out_be32(&lbc->ltear, 0);
+        ctrl->irq_status = status;
+
+        if (status & LTESR_BM)
+                dev_err(ctrl->dev, "Local bus monitor time-out: "
+                        "LTESR 0x%08X\n", status);
+        if (status & LTESR_WP)
+                dev_err(ctrl->dev, "Write protect error: "
+                        "LTESR 0x%08X\n", status);
+        if (status & LTESR_ATMW)
+                dev_err(ctrl->dev, "Atomic write error: "
+                        "LTESR 0x%08X\n", status);
+        if (status & LTESR_ATMR)
+                dev_err(ctrl->dev, "Atomic read error: "
+                        "LTESR 0x%08X\n", status);
+        if (status & LTESR_CS)
+                dev_err(ctrl->dev, "Chip select error: "
+                        "LTESR 0x%08X\n", status);
+        if (status & LTESR_UPM)
+                ;
+        if (status & LTESR_FCT) {
+                dev_err(ctrl->dev, "FCM command time-out: "
+                        "LTESR 0x%08X\n", status);
+                smp_wmb();
+                wake_up(&ctrl->irq_wait);
+        }
+        if (status & LTESR_PAR) {
+                dev_err(ctrl->dev, "Parity or Uncorrectable ECC error: "
+                        "LTESR 0x%08X\n", status);
+                smp_wmb();
+                wake_up(&ctrl->irq_wait);
+        }
+        if (status & LTESR_CC) {
+                smp_wmb();
+                wake_up(&ctrl->irq_wait);
+        }
+        if (status & ~LTESR_MASK)
+                dev_err(ctrl->dev, "Unknown error: "
+                        "LTESR 0x%08X\n", status);
+        return IRQ_HANDLED;
+}
+
+/*
+ * fsl_lbc_ctrl_probe
+ *
+ * called by device layer when it finds a device matching
+ * one our driver can handled. This code allocates all of
+ * the resources needed for the controller only.  The
+ * resources for the NAND banks themselves are allocated
+ * in the chip probe function.
+*/
+
+static int __devinit fsl_lbc_ctrl_probe(struct platform_device *dev)
+{
+        int ret;
+
+        if (!dev->dev.of_node) {
+                dev_err(&dev->dev, "Device OF-Node is NULL");
+                return -EFAULT;
+        }
+
+        fsl_lbc_ctrl_dev = kzalloc(sizeof(*fsl_lbc_ctrl_dev), GFP_KERNEL);
+        if (!fsl_lbc_ctrl_dev)
+                return -ENOMEM;
+
+        dev_set_drvdata(&dev->dev, fsl_lbc_ctrl_dev);
+
+        spin_lock_init(&fsl_lbc_ctrl_dev->lock);
+        init_waitqueue_head(&fsl_lbc_ctrl_dev->irq_wait);
+
+        fsl_lbc_ctrl_dev->regs = of_iomap(dev->dev.of_node, 0);
+        if (!fsl_lbc_ctrl_dev->regs) {
+                dev_err(&dev->dev, "failed to get memory region\n");
+                ret = -ENODEV;
+                goto err;
+        }
+
+        fsl_lbc_ctrl_dev->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
+        if (fsl_lbc_ctrl_dev->irq == NO_IRQ) {
+                dev_err(&dev->dev, "failed to get irq resource\n");
+                ret = -ENODEV;
+                goto err;
+        }
+
+        fsl_lbc_ctrl_dev->dev = &dev->dev;
+
+        ret = fsl_lbc_ctrl_init(fsl_lbc_ctrl_dev);
+        if (ret < 0)
+                goto err;
+
+        ret = request_irq(fsl_lbc_ctrl_dev->irq, fsl_lbc_ctrl_irq, 0,
+                                "fsl-lbc", fsl_lbc_ctrl_dev);
+        if (ret != 0) {
+                dev_err(&dev->dev, "failed to install irq (%d)\n",
+                        fsl_lbc_ctrl_dev->irq);
+                ret = fsl_lbc_ctrl_dev->irq;
+                goto err;
+        }
+
+        return 0;
+
+err:
+        iounmap(fsl_lbc_ctrl_dev->regs);
+        kfree(fsl_lbc_ctrl_dev);
+        return ret;
+}
+
+static const struct of_device_id fsl_lbc_match[] = {
+        { .compatible = "fsl,elbc", },
+        { .compatible = "fsl,pq3-localbus", },
+        { .compatible = "fsl,pq2-localbus", },
+        { .compatible = "fsl,pq2pro-localbus", },
+        {},
+};
+
+static struct platform_driver fsl_lbc_ctrl_driver = {
+        .driver = {
+                .name = "fsl-lbc",
+                .of_match_table = fsl_lbc_match,
+        },
+        .probe = fsl_lbc_ctrl_probe,
+};
+
+static int __init fsl_lbc_init(void)
+{
+        return platform_driver_register(&fsl_lbc_ctrl_driver);
+}
+module_init(fsl_lbc_init);