[MTD] sharpsl-nand: use platform_data for model-specific values
Dmitry Baryshkov [Thu, 16 Oct 2008 14:43:48 +0000 (18:43 +0400)]
Add platform_data which holds all model-specific values, like badblocks
pattern, oobinfo, partitions.

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

drivers/mtd/nand/sharpsl.c
include/linux/mtd/sharpsl.h [new file with mode: 0644]

index 17625c0..698378c 100644 (file)
@@ -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 (file)
index 0000000..25f4d2a
--- /dev/null
@@ -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;
+};