1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/mtd/nand/toto.c b/drivers/mtd/nand/toto.c
new file mode 100644
index 000000000000..52c808fb5fa9
--- /dev/null
+++ b/drivers/mtd/nand/toto.c
@@ -0,0 +1,205 @@
+/*
+ *  drivers/mtd/nand/toto.c
+ *
+ *  Copyright (c) 2003 Texas Instruments
+ *
+ *  Derived from drivers/mtd/autcpu12.c
+ *
+ *  Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
+ *
+ * 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.
+ *
+ *  Overview:
+ *   This is a device driver for the NAND flash device found on the
+ *   TI fido board. It supports 32MiB and 64MiB cards
+ *
+ * $Id: toto.c,v 1.4 2004/10/05 13:50:20 gleixner Exp $
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/sizes.h>
+#include <asm/arch/toto.h>
+#include <asm/arch-omap1510/hardware.h>
+#include <asm/arch/gpio.h>
+
+/*
+ * MTD structure for TOTO board
+ */
+static struct mtd_info *toto_mtd = NULL;
+
+static unsigned long toto_io_base = OMAP_FLASH_1_BASE;
+
+#define CONFIG_NAND_WORKAROUND 1
+
+#define NAND_NCE 0x4000
+#define NAND_CLE 0x1000
+#define NAND_ALE 0x0002
+#define NAND_MASK (NAND_CLE | NAND_ALE | NAND_NCE)
+
+#define T_NAND_CTL_CLRALE(iob)  gpiosetout(NAND_ALE, 0)
+#define T_NAND_CTL_SETALE(iob)  gpiosetout(NAND_ALE, NAND_ALE)
+#ifdef CONFIG_NAND_WORKAROUND     /* "some" dev boards busted, blue wired to rts2 :( */
+#define T_NAND_CTL_CLRCLE(iob)  gpiosetout(NAND_CLE, 0); rts2setout(2, 2)
+#define T_NAND_CTL_SETCLE(iob)  gpiosetout(NAND_CLE, NAND_CLE); rts2setout(2, 0)
+#else
+#define T_NAND_CTL_CLRCLE(iob)  gpiosetout(NAND_CLE, 0)
+#define T_NAND_CTL_SETCLE(iob)  gpiosetout(NAND_CLE, NAND_CLE)
+#endif
+#define T_NAND_CTL_SETNCE(iob)  gpiosetout(NAND_NCE, 0)
+#define T_NAND_CTL_CLRNCE(iob)  gpiosetout(NAND_NCE, NAND_NCE)
+                
+/*
+ * Define partitions for flash devices
+ */
+
+static struct mtd_partition partition_info64M[] = {
+        { .name =       "toto kernel partition 1",
+          .offset =     0,
+          .size =       2 * SZ_1M },
+        { .name =       "toto file sys partition 2",
+          .offset =     2 * SZ_1M,
+          .size =       14 * SZ_1M },
+        { .name =       "toto user partition 3",
+          .offset =     16 * SZ_1M,
+          .size =       16 * SZ_1M },
+        { .name =       "toto devboard extra partition 4",
+          .offset =     32 * SZ_1M,
+          .size =       32 * SZ_1M },
+};
+
+static struct mtd_partition partition_info32M[] = {
+        { .name =       "toto kernel partition 1",
+          .offset =     0,
+          .size =       2 * SZ_1M },
+        { .name =       "toto file sys partition 2",
+          .offset =     2 * SZ_1M,
+          .size =       14 * SZ_1M },
+        { .name =       "toto user partition 3",
+          .offset =     16 * SZ_1M,
+          .size =       16 * SZ_1M },
+};
+
+#define NUM_PARTITIONS32M 3
+#define NUM_PARTITIONS64M 4
+/* 
+ *      hardware specific access to control-lines
+*/
+
+static void toto_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+
+        udelay(1); /* hopefully enough time for tc make proceding write to clear */
+        switch(cmd){
+
+                case NAND_CTL_SETCLE: T_NAND_CTL_SETCLE(cmd); break;
+                case NAND_CTL_CLRCLE: T_NAND_CTL_CLRCLE(cmd); break;
+
+                case NAND_CTL_SETALE: T_NAND_CTL_SETALE(cmd); break;
+                case NAND_CTL_CLRALE: T_NAND_CTL_CLRALE(cmd); break;
+
+                case NAND_CTL_SETNCE: T_NAND_CTL_SETNCE(cmd); break;
+                case NAND_CTL_CLRNCE: T_NAND_CTL_CLRNCE(cmd); break;
+        }
+        udelay(1); /* allow time to ensure gpio state to over take memory write */
+}
+
+/*
+ * Main initialization routine
+ */
+int __init toto_init (void)
+{
+        struct nand_chip *this;
+        int err = 0;
+
+        /* Allocate memory for MTD device structure and private data */
+        toto_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
+                                GFP_KERNEL);
+        if (!toto_mtd) {
+                printk (KERN_WARNING "Unable to allocate toto NAND MTD device structure.\n");
+                err = -ENOMEM;
+                goto out;
+        }
+
+        /* Get pointer to private data */
+        this = (struct nand_chip *) (&toto_mtd[1]);
+
+        /* Initialize structures */
+        memset((char *) toto_mtd, 0, sizeof(struct mtd_info));
+        memset((char *) this, 0, sizeof(struct nand_chip));
+
+        /* Link the private data with the MTD structure */
+        toto_mtd->priv = this;
+
+        /* Set address of NAND IO lines */
+        this->IO_ADDR_R = toto_io_base;
+        this->IO_ADDR_W = toto_io_base;
+        this->hwcontrol = toto_hwcontrol;
+        this->dev_ready = NULL;
+        /* 25 us command delay time */
+        this->chip_delay = 30;          
+        this->eccmode = NAND_ECC_SOFT;
+
+        /* Scan to find existance of the device */
+        if (nand_scan (toto_mtd, 1)) {
+                err = -ENXIO;
+                goto out_mtd;
+        }
+
+        /* Register the partitions */
+        switch(toto_mtd->size){
+                case SZ_64M: add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M); break; 
+                case SZ_32M: add_mtd_partitions(toto_mtd, partition_info32M, NUM_PARTITIONS32M); break; 
+                default: {
+                        printk (KERN_WARNING "Unsupported Nand device\n"); 
+                        err = -ENXIO;
+                        goto out_buf;
+                }
+        }
+
+        gpioreserve(NAND_MASK);  /* claim our gpios */
+        archflashwp(0,0);        /* open up flash for writing */
+
+        goto out;
+    
+out_buf:
+        kfree (this->data_buf);    
+out_mtd:
+        kfree (toto_mtd);
+out:
+        return err;
+}
+
+module_init(toto_init);
+
+/*
+ * Clean up routine
+ */
+static void __exit toto_cleanup (void)
+{
+        /* Release resources, unregister device */
+        nand_release (toto_mtd);
+
+        /* Free the MTD device structure */
+        kfree (toto_mtd);
+
+        /* stop flash writes */
+         archflashwp(0,1);
+        
+        /* release gpios to system */
+         gpiorelease(NAND_MASK);
+}
+module_exit(toto_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Richard Woodruff <r-woodruff2@ti.com>");
+MODULE_DESCRIPTION("Glue layer for NAND flash on toto board");