|
|
@@ -1,206 +0,0 @@
|
|
|
-/*
|
|
|
- * 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
|
|
|
- */
|
|
|
-
|
|
|
-#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>
|
|
|
-
|
|
|
-#define CONFIG_NAND_WORKAROUND 1
|
|
|
-
|
|
|
-/*
|
|
|
- * MTD structure for TOTO board
|
|
|
- */
|
|
|
-static struct mtd_info *toto_mtd = NULL;
|
|
|
-
|
|
|
-static unsigned long toto_io_base = OMAP_FLASH_1_BASE;
|
|
|
-
|
|
|
-/*
|
|
|
- * 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
|
|
|
- *
|
|
|
- * ctrl:
|
|
|
- * NAND_NCE: bit 0 -> bit 14 (0x4000)
|
|
|
- * NAND_CLE: bit 1 -> bit 12 (0x1000)
|
|
|
- * NAND_ALE: bit 2 -> bit 1 (0x0002)
|
|
|
- */
|
|
|
-static void toto_hwcontrol(struct mtd_info *mtd, int cmd,
|
|
|
- unsigned int ctrl)
|
|
|
-{
|
|
|
- struct nand_chip *chip = mtd->priv;
|
|
|
-
|
|
|
- if (ctrl & NAND_CTRL_CHANGE) {
|
|
|
- unsigned long bits;
|
|
|
-
|
|
|
- /* hopefully enough time for tc make proceding write to clear */
|
|
|
- udelay(1);
|
|
|
-
|
|
|
- bits = (~ctrl & NAND_NCE) << 14;
|
|
|
- bits |= (ctrl & NAND_CLE) << 12;
|
|
|
- bits |= (ctrl & NAND_ALE) >> 1;
|
|
|
-
|
|
|
-#warning Wild guess as gpiosetout() is nowhere defined in the kernel source - tglx
|
|
|
- gpiosetout(0x5002, bits);
|
|
|
-
|
|
|
-#ifdef CONFIG_NAND_WORKAROUND
|
|
|
- /* "some" dev boards busted, blue wired to rts2 :( */
|
|
|
- rts2setout(2, (ctrl & NAND_CLE) << 1);
|
|
|
-#endif
|
|
|
- /* allow time to ensure gpio state to over take memory write */
|
|
|
- udelay(1);
|
|
|
- }
|
|
|
-
|
|
|
- if (cmd != NAND_CMD_NONE)
|
|
|
- writeb(cmd, chip->IO_ADDR_W);
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Main initialization routine
|
|
|
- */
|
|
|
-static 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(toto_mtd, 0, sizeof(struct mtd_info));
|
|
|
- memset(this, 0, sizeof(struct nand_chip));
|
|
|
-
|
|
|
- /* Link the private data with the MTD structure */
|
|
|
- toto_mtd->priv = this;
|
|
|
- toto_mtd->owner = THIS_MODULE;
|
|
|
-
|
|
|
- /* Set address of NAND IO lines */
|
|
|
- this->IO_ADDR_R = toto_io_base;
|
|
|
- this->IO_ADDR_W = toto_io_base;
|
|
|
- this->cmd_ctrl = toto_hwcontrol;
|
|
|
- this->dev_ready = NULL;
|
|
|
- /* 25 us command delay time */
|
|
|
- this->chip_delay = 30;
|
|
|
- this->ecc.mode = 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_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");
|
David Woodhouse