[MTD] sharpsl-nand: use platform_data for model-specific values

Add platform_data which holds all model-specific values, like badblocks
pattern, oobinfo, partitions.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>

2 files changed, 104 insertions, 74 deletions

diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c
index 17625c0a8f6..698378ca8e0 100644
--- a/drivers/mtd/nand/sharpsl.c
+++ b/drivers/mtd/nand/sharpsl.c
@@ -20,6 +20,7 @@
 #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>
 
@@ -53,31 +54,6 @@ struct sharpsl_nand {
 #define FLCLE           (1 << 1)
 #define FLCE0           (1 << 0)
 
-#ifdef CONFIG_MTD_PARTITIONS
-/*
- * Define partitions for flash device
- */
-#define DEFAULT_NUM_PARTITIONS 3
-
-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,
-         },
-};
-#endif
-
 /*
  *      hardware specific access to control-lines
  *      ctrl:
@@ -106,31 +82,6 @@ static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd,
                 writeb(cmd, chip->IO_ADDR_W);
 }
 
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
-
-static struct nand_bbt_descr sharpsl_bbt = {
-        .options = 0,
-        .offs = 4,
-        .len = 2,
-        .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr sharpsl_akita_bbt = {
-        .options = 0,
-        .offs = 4,
-        .len = 1,
-        .pattern = scan_ff_pattern
-};
-
-static struct nand_ecclayout akita_oobinfo = {
-        .eccbytes = 24,
-        .eccpos = {
-                   0x5, 0x1, 0x2, 0x3, 0x6, 0x7, 0x15, 0x11,
-                   0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
-                   0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},
-        .oobfree = {{0x08, 0x09}}
-};
-
 static int sharpsl_nand_dev_ready(struct mtd_info *mtd)
 {
         struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd);
@@ -169,6 +120,12 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
         struct resource *r;
         int err = 0;
         struct sharpsl_nand *sharpsl;
+        struct sharpsl_nand_platform_data *data = pdev->dev.platform_data;
+
+        if (!data) {
+                dev_err(&pdev->dev, "no platform data!\n");
+                return -EINVAL;
+        }
 
         /* Allocate memory for MTD device structure and private data */
         sharpsl = kzalloc(sizeof(struct sharpsl_nand), GFP_KERNEL);
@@ -218,11 +175,8 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
         this->ecc.mode = NAND_ECC_HW;
         this->ecc.size = 256;
         this->ecc.bytes = 3;
-        this->badblock_pattern = &sharpsl_bbt;
-        if (machine_is_akita() || machine_is_borzoi()) {
-                this->badblock_pattern = &sharpsl_akita_bbt;
-                this->ecc.layout = &akita_oobinfo;
-        }
+        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;
@@ -236,29 +190,16 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
         sharpsl->mtd.name = "sharpsl-nand";
 #ifdef CONFIG_MTD_PARTITIONS
         nr_partitions = parse_mtd_partitions(&sharpsl->mtd, part_probes, &sharpsl_partition_info, 0);
-
         if (nr_partitions <= 0) {
-                nr_partitions = ARRAY_SIZE(sharpsl_nand_default_partition_info);
-                sharpsl_partition_info = sharpsl_nand_default_partition_info;
-                if (machine_is_poodle()) {
-                        sharpsl_partition_info[1].size = 22 * 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;
-                }
+                nr_partitions = data->nr_partitions;
+                sharpsl_partition_info = data->partitions;
         }
 
-        err = add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
-#else
-        err = add_mtd_device(&sharpsl->mtd);
+        if (nr_partitions > 0)
+                err = add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
+        else
 #endif
+        err = add_mtd_device(&sharpsl->mtd);
         if (err)
                 goto err_add;
 
@@ -306,6 +247,58 @@ static struct platform_driver sharpsl_nand_driver = {
         .remove         = __devexit_p(sharpsl_nand_remove),
 };
 
+/*
+ * Define partitions for flash device
+ */
+static struct mtd_partition sharpsl_nand_partitions[] = {
+        {
+         .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,
+         },
+};
+
+static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
+
+static struct nand_bbt_descr sharpsl_bbt = {
+        .options = 0,
+        .offs = 4,
+        .len = 2,
+        .pattern = scan_ff_pattern
+};
+
+static struct nand_bbt_descr sharpsl_akita_bbt = {
+        .options = 0,
+        .offs = 4,
+        .len = 1,
+        .pattern = scan_ff_pattern
+};
+
+static struct nand_ecclayout akita_oobinfo = {
+        .eccbytes = 24,
+        .eccpos = {
+                   0x5, 0x1, 0x2, 0x3, 0x6, 0x7, 0x15, 0x11,
+                   0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
+                   0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},
+        .oobfree = {{0x08, 0x09}}
+};
+
+static struct sharpsl_nand_platform_data sharpsl_nand_platform_data = {
+        .badblock_pattern       = &sharpsl_bbt,
+        .partitions             = sharpsl_nand_partitions,
+        .nr_partitions          = ARRAY_SIZE(sharpsl_nand_partitions),
+};
+
 static struct resource sharpsl_nand_resources[] = {
         {
                 .start  = 0x0C000000,
@@ -319,10 +312,27 @@ static struct platform_device sharpsl_nand_device = {
         .id             = -1,
         .resource       = sharpsl_nand_resources,
         .num_resources  = ARRAY_SIZE(sharpsl_nand_resources),
+        .dev.platform_data      = &sharpsl_nand_platform_data,
 };
 
 static int __init sharpsl_nand_init(void)
 {
+        if (machine_is_poodle()) {
+                sharpsl_nand_partitions[1].size = 22 * 1024 * 1024;
+        } else if (machine_is_corgi() || machine_is_shepherd()) {
+                sharpsl_nand_partitions[1].size = 25 * 1024 * 1024;
+        } else if (machine_is_husky()) {
+                sharpsl_nand_partitions[1].size = 53 * 1024 * 1024;
+        } else if (machine_is_spitz()) {
+                sharpsl_nand_partitions[1].size = 5 * 1024 * 1024;
+        } else if (machine_is_akita()) {
+                sharpsl_nand_partitions[1].size = 58 * 1024 * 1024;
+                sharpsl_nand_platform_data.badblock_pattern = &sharpsl_akita_bbt;
+                sharpsl_nand_platform_data.ecc_layout = &akita_oobinfo;
+        } else if (machine_is_borzoi()) {
+                sharpsl_nand_partitions[1].size = 32 * 1024 * 1024;
+        }
+
         platform_device_register(&sharpsl_nand_device);
         return platform_driver_register(&sharpsl_nand_driver);
 }
diff --git a/include/linux/mtd/sharpsl.h b/include/linux/mtd/sharpsl.h
new file mode 100644
index 00000000000..25f4d2a845c
--- /dev/null
+++ b/include/linux/mtd/sharpsl.h
@@ -0,0 +1,20 @@
+/*
+ * SharpSL NAND support
+ *
+ * Copyright (C) 2008 Dmitry Baryshkov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/mtd/partitions.h>
+
+struct sharpsl_nand_platform_data {
+        struct nand_bbt_descr   *badblock_pattern;
+        struct nand_ecclayout   *ecc_layout;
+        struct mtd_partition    *partitions;
+        unsigned int            nr_partitions;
+};