1 files changed, 133 insertions, 136 deletions

diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c
index 955959eb02d4..582cf80f555a 100644
--- a/drivers/mtd/nand/ndfc.c
+++ b/drivers/mtd/nand/ndfc.c
@@ -2,12 +2,20 @@
  *  drivers/mtd/ndfc.c
  *
  *  Overview:
- *   Platform independend driver for NDFC (NanD Flash Controller)
+ *   Platform independent driver for NDFC (NanD Flash Controller)
  *   integrated into EP440 cores
  *
+ *   Ported to an OF platform driver by Sean MacLennan
+ *
+ *   The NDFC supports multiple chips, but this driver only supports a
+ *   single chip since I do not have access to any boards with
+ *   multiple chips.
+ *
  *  Author: Thomas Gleixner
  *
  *  Copyright 2006 IBM
+ *  Copyright 2008 PIKA Technologies
+ *    Sean MacLennan <smaclennan@pikatech.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 the
@@ -21,27 +29,20 @@
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/ndfc.h>
 #include <linux/mtd/mtd.h>
-#include <linux/platform_device.h>
-
+#include <linux/of_platform.h>
 #include <asm/io.h>
-#ifdef CONFIG_40x
-#include <asm/ibm405.h>
-#else
-#include <asm/ibm44x.h>
-#endif
-
-struct ndfc_nand_mtd {
-        struct mtd_info                 mtd;
-        struct nand_chip                chip;
-        struct platform_nand_chip       *pl_chip;
-};
 
-static struct ndfc_nand_mtd ndfc_mtd[NDFC_MAX_BANKS];
 
 struct ndfc_controller {
-        void __iomem            *ndfcbase;
-        struct nand_hw_control  ndfc_control;
-        atomic_t                childs_active;
+        struct of_device *ofdev;
+        void __iomem *ndfcbase;
+        struct mtd_info mtd;
+        struct nand_chip chip;
+        int chip_select;
+        struct nand_hw_control ndfc_control;
+#ifdef CONFIG_MTD_PARTITIONS
+        struct mtd_partition *parts;
+#endif
 };
 
 static struct ndfc_controller ndfc_ctrl;
@@ -50,17 +51,14 @@ static void ndfc_select_chip(struct mtd_info *mtd, int chip)
 {
         uint32_t ccr;
         struct ndfc_controller *ndfc = &ndfc_ctrl;
-        struct nand_chip *nandchip = mtd->priv;
-        struct ndfc_nand_mtd *nandmtd = nandchip->priv;
-        struct platform_nand_chip *pchip = nandmtd->pl_chip;
 
-        ccr = __raw_readl(ndfc->ndfcbase + NDFC_CCR);
+        ccr = in_be32(ndfc->ndfcbase + NDFC_CCR);
         if (chip >= 0) {
                 ccr &= ~NDFC_CCR_BS_MASK;
-                ccr |= NDFC_CCR_BS(chip + pchip->chip_offset);
+                ccr |= NDFC_CCR_BS(chip + ndfc->chip_select);
         } else
                 ccr |= NDFC_CCR_RESET_CE;
-        __raw_writel(ccr, ndfc->ndfcbase + NDFC_CCR);
+        out_be32(ndfc->ndfcbase + NDFC_CCR, ccr);
 }
 
 static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
@@ -80,7 +78,7 @@ static int ndfc_ready(struct mtd_info *mtd)
 {
         struct ndfc_controller *ndfc = &ndfc_ctrl;
 
-        return __raw_readl(ndfc->ndfcbase + NDFC_STAT) & NDFC_STAT_IS_READY;
+        return in_be32(ndfc->ndfcbase + NDFC_STAT) & NDFC_STAT_IS_READY;
 }
 
 static void ndfc_enable_hwecc(struct mtd_info *mtd, int mode)
@@ -88,9 +86,9 @@ static void ndfc_enable_hwecc(struct mtd_info *mtd, int mode)
         uint32_t ccr;
         struct ndfc_controller *ndfc = &ndfc_ctrl;
 
-        ccr = __raw_readl(ndfc->ndfcbase + NDFC_CCR);
+        ccr = in_be32(ndfc->ndfcbase + NDFC_CCR);
         ccr |= NDFC_CCR_RESET_ECC;
-        __raw_writel(ccr, ndfc->ndfcbase + NDFC_CCR);
+        out_be32(ndfc->ndfcbase + NDFC_CCR, ccr);
         wmb();
 }
 
@@ -102,9 +100,10 @@ static int ndfc_calculate_ecc(struct mtd_info *mtd,
         uint8_t *p = (uint8_t *)&ecc;
 
         wmb();
-        ecc = __raw_readl(ndfc->ndfcbase + NDFC_ECC);
-        ecc_code[0] = p[1];
-        ecc_code[1] = p[2];
+        ecc = in_be32(ndfc->ndfcbase + NDFC_ECC);
+        /* The NDFC uses Smart Media (SMC) bytes order */
+        ecc_code[0] = p[2];
+        ecc_code[1] = p[1];
         ecc_code[2] = p[3];
 
         return 0;
@@ -123,7 +122,7 @@ static void ndfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
         uint32_t *p = (uint32_t *) buf;
 
         for(;len > 0; len -= 4)
-                *p++ = __raw_readl(ndfc->ndfcbase + NDFC_DATA);
+                *p++ = in_be32(ndfc->ndfcbase + NDFC_DATA);
 }
 
 static void ndfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
@@ -132,7 +131,7 @@ static void ndfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
         uint32_t *p = (uint32_t *) buf;
 
         for(;len > 0; len -= 4)
-                __raw_writel(*p++, ndfc->ndfcbase + NDFC_DATA);
+                out_be32(ndfc->ndfcbase + NDFC_DATA, *p++);
 }
 
 static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
@@ -141,7 +140,7 @@ static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
         uint32_t *p = (uint32_t *) buf;
 
         for(;len > 0; len -= 4)
-                if (*p++ != __raw_readl(ndfc->ndfcbase + NDFC_DATA))
+                if (*p++ != in_be32(ndfc->ndfcbase + NDFC_DATA))
                         return -EFAULT;
         return 0;
 }
@@ -149,10 +148,19 @@ static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
 /*
  * Initialize chip structure
  */
-static void ndfc_chip_init(struct ndfc_nand_mtd *mtd)
+static int ndfc_chip_init(struct ndfc_controller *ndfc,
+                          struct device_node *node)
 {
-        struct ndfc_controller *ndfc = &ndfc_ctrl;
-        struct nand_chip *chip = &mtd->chip;
+#ifdef CONFIG_MTD_PARTITIONS
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+        static const char *part_types[] = { "cmdlinepart", NULL };
+#else
+        static const char *part_types[] = { NULL };
+#endif
+#endif
+        struct device_node *flash_np;
+        struct nand_chip *chip = &ndfc->chip;
+        int ret;
 
         chip->IO_ADDR_R = ndfc->ndfcbase + NDFC_DATA;
         chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_DATA;
@@ -160,8 +168,6 @@ static void ndfc_chip_init(struct ndfc_nand_mtd *mtd)
         chip->dev_ready = ndfc_ready;
         chip->select_chip = ndfc_select_chip;
         chip->chip_delay = 50;
-        chip->priv = mtd;
-        chip->options = mtd->pl_chip->options;
         chip->controller = &ndfc->ndfc_control;
         chip->read_buf = ndfc_read_buf;
         chip->write_buf = ndfc_write_buf;
@@ -172,143 +178,136 @@ static void ndfc_chip_init(struct ndfc_nand_mtd *mtd)
         chip->ecc.mode = NAND_ECC_HW;
         chip->ecc.size = 256;
         chip->ecc.bytes = 3;
-        chip->ecclayout = chip->ecc.layout = mtd->pl_chip->ecclayout;
-        mtd->mtd.priv = chip;
-        mtd->mtd.owner = THIS_MODULE;
-}
-
-static int ndfc_chip_probe(struct platform_device *pdev)
-{
-        struct platform_nand_chip *nc = pdev->dev.platform_data;
-        struct ndfc_chip_settings *settings = nc->priv;
-        struct ndfc_controller *ndfc = &ndfc_ctrl;
-        struct ndfc_nand_mtd *nandmtd;
-
-        if (nc->chip_offset >= NDFC_MAX_BANKS || nc->nr_chips > NDFC_MAX_BANKS)
-                return -EINVAL;
-
-        /* Set the bank settings */
-        __raw_writel(settings->bank_settings,
-                     ndfc->ndfcbase + NDFC_BCFG0 + (nc->chip_offset << 2));
 
-        nandmtd = &ndfc_mtd[pdev->id];
-        if (nandmtd->pl_chip)
-                return -EBUSY;
+        ndfc->mtd.priv = chip;
+        ndfc->mtd.owner = THIS_MODULE;
 
-        nandmtd->pl_chip = nc;
-        ndfc_chip_init(nandmtd);
-
-        /* Scan for chips */
-        if (nand_scan(&nandmtd->mtd, nc->nr_chips)) {
-                nandmtd->pl_chip = NULL;
+        flash_np = of_get_next_child(node, NULL);
+        if (!flash_np)
                 return -ENODEV;
+
+        ndfc->mtd.name = kasprintf(GFP_KERNEL, "%s.%s",
+                                   ndfc->ofdev->dev.bus_id, flash_np->name);
+        if (!ndfc->mtd.name) {
+                ret = -ENOMEM;
+                goto err;
         }
 
-#ifdef CONFIG_MTD_PARTITIONS
-        printk("Number of partitions %d\n", nc->nr_partitions);
-        if (nc->nr_partitions) {
-                /* Add the full device, so complete dumps can be made */
-                add_mtd_device(&nandmtd->mtd);
-                add_mtd_partitions(&nandmtd->mtd, nc->partitions,
-                                   nc->nr_partitions);
+        ret = nand_scan(&ndfc->mtd, 1);
+        if (ret)
+                goto err;
 
-        } else
-#else
-                add_mtd_device(&nandmtd->mtd);
+#ifdef CONFIG_MTD_PARTITIONS
+        ret = parse_mtd_partitions(&ndfc->mtd, part_types, &ndfc->parts, 0);
+        if (ret < 0)
+                goto err;
+
+#ifdef CONFIG_MTD_OF_PARTS
+        if (ret == 0) {
+                ret = of_mtd_parse_partitions(&ndfc->ofdev->dev, flash_np,
+                                              &ndfc->parts);
+                if (ret < 0)
+                        goto err;
+        }
 #endif
 
-        atomic_inc(&ndfc->childs_active);
-        return 0;
-}
+        if (ret > 0)
+                ret = add_mtd_partitions(&ndfc->mtd, ndfc->parts, ret);
+        else
+#endif
+                ret = add_mtd_device(&ndfc->mtd);
 
-static int ndfc_chip_remove(struct platform_device *pdev)
-{
-        return 0;
+err:
+        of_node_put(flash_np);
+        if (ret)
+                kfree(ndfc->mtd.name);
+        return ret;
 }
 
-static int ndfc_nand_probe(struct platform_device *pdev)
+static int __devinit ndfc_probe(struct of_device *ofdev,
+                                const struct of_device_id *match)
 {
-        struct platform_nand_ctrl *nc = pdev->dev.platform_data;
-        struct ndfc_controller_settings *settings = nc->priv;
-        struct resource *res = pdev->resource;
         struct ndfc_controller *ndfc = &ndfc_ctrl;
-        unsigned long long phys = settings->ndfc_erpn | res->start;
+        const u32 *reg;
+        u32 ccr;
+        int err, len;
 
-#ifndef CONFIG_PHYS_64BIT
-        ndfc->ndfcbase = ioremap((phys_addr_t)phys, res->end - res->start + 1);
-#else
-        ndfc->ndfcbase = ioremap64(phys, res->end - res->start + 1);
-#endif
+        spin_lock_init(&ndfc->ndfc_control.lock);
+        init_waitqueue_head(&ndfc->ndfc_control.wq);
+        ndfc->ofdev = ofdev;
+        dev_set_drvdata(&ofdev->dev, ndfc);
+
+        /* Read the reg property to get the chip select */
+        reg = of_get_property(ofdev->node, "reg", &len);
+        if (reg == NULL || len != 12) {
+                dev_err(&ofdev->dev, "unable read reg property (%d)\n", len);
+                return -ENOENT;
+        }
+        ndfc->chip_select = reg[0];
+
+        ndfc->ndfcbase = of_iomap(ofdev->node, 0);
         if (!ndfc->ndfcbase) {
-                printk(KERN_ERR "NDFC: ioremap failed\n");
+                dev_err(&ofdev->dev, "failed to get memory\n");
                 return -EIO;
         }
 
-        __raw_writel(settings->ccr_settings, ndfc->ndfcbase + NDFC_CCR);
+        ccr = NDFC_CCR_BS(ndfc->chip_select);
 
-        spin_lock_init(&ndfc->ndfc_control.lock);
-        init_waitqueue_head(&ndfc->ndfc_control.wq);
+        /* It is ok if ccr does not exist - just default to 0 */
+        reg = of_get_property(ofdev->node, "ccr", NULL);
+        if (reg)
+                ccr |= *reg;
 
-        platform_set_drvdata(pdev, ndfc);
+        out_be32(ndfc->ndfcbase + NDFC_CCR, ccr);
 
-        printk("NDFC NAND Driver initialized. Chip-Rev: 0x%08x\n",
-               __raw_readl(ndfc->ndfcbase + NDFC_REVID));
+        /* Set the bank settings if given */
+        reg = of_get_property(ofdev->node, "bank-settings", NULL);
+        if (reg) {
+                int offset = NDFC_BCFG0 + (ndfc->chip_select << 2);
+                out_be32(ndfc->ndfcbase + offset, *reg);
+        }
+
+        err = ndfc_chip_init(ndfc, ofdev->node);
+        if (err) {
+                iounmap(ndfc->ndfcbase);
+                return err;
+        }
 
         return 0;
 }
 
-static int ndfc_nand_remove(struct platform_device *pdev)
+static int __devexit ndfc_remove(struct of_device *ofdev)
 {
-        struct ndfc_controller *ndfc = platform_get_drvdata(pdev);
+        struct ndfc_controller *ndfc = dev_get_drvdata(&ofdev->dev);
 
-        if (atomic_read(&ndfc->childs_active))
-                return -EBUSY;
+        nand_release(&ndfc->mtd);
 
-        if (ndfc) {
-                platform_set_drvdata(pdev, NULL);
-                iounmap(ndfc_ctrl.ndfcbase);
-                ndfc_ctrl.ndfcbase = NULL;
-        }
         return 0;
 }
 
-/* driver device registration */
-
-static struct platform_driver ndfc_chip_driver = {
-        .probe          = ndfc_chip_probe,
-        .remove         = ndfc_chip_remove,
-        .driver         = {
-                .name   = "ndfc-chip",
-                .owner  = THIS_MODULE,
-        },
+static const struct of_device_id ndfc_match[] = {
+        { .compatible = "ibm,ndfc", },
+        {}
 };
+MODULE_DEVICE_TABLE(of, ndfc_match);
 
-static struct platform_driver ndfc_nand_driver = {
-        .probe          = ndfc_nand_probe,
-        .remove         = ndfc_nand_remove,
-        .driver         = {
-                .name   = "ndfc-nand",
-                .owner  = THIS_MODULE,
+static struct of_platform_driver ndfc_driver = {
+        .driver = {
+                .name   = "ndfc",
         },
+        .match_table = ndfc_match,
+        .probe = ndfc_probe,
+        .remove = __devexit_p(ndfc_remove),
 };
 
 static int __init ndfc_nand_init(void)
 {
-        int ret;
-
-        spin_lock_init(&ndfc_ctrl.ndfc_control.lock);
-        init_waitqueue_head(&ndfc_ctrl.ndfc_control.wq);
-
-        ret = platform_driver_register(&ndfc_nand_driver);
-        if (!ret)
-                ret = platform_driver_register(&ndfc_chip_driver);
-        return ret;
+        return of_register_platform_driver(&ndfc_driver);
 }
 
 static void __exit ndfc_nand_exit(void)
 {
-        platform_driver_unregister(&ndfc_chip_driver);
-        platform_driver_unregister(&ndfc_nand_driver);
+        of_unregister_platform_driver(&ndfc_driver);
 }
 
 module_init(ndfc_nand_init);
@@ -316,6 +315,4 @@ module_exit(ndfc_nand_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
-MODULE_DESCRIPTION("Platform driver for NDFC");
-MODULE_ALIAS("platform:ndfc-chip");
-MODULE_ALIAS("platform:ndfc-nand");
+MODULE_DESCRIPTION("OF Platform driver for NDFC");