From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- drivers/mtd/nand/h1910.c | 168 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 drivers/mtd/nand/h1910.c (limited to 'drivers/mtd/nand/h1910.c') diff --git a/drivers/mtd/nand/h1910.c b/drivers/mtd/nand/h1910.c new file mode 100644 index 00000000..11e48781 --- /dev/null +++ b/drivers/mtd/nand/h1910.c @@ -0,0 +1,168 @@ +/* + * drivers/mtd/nand/h1910.c + * + * Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com) + * + * Derived from drivers/mtd/nand/edb7312.c + * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) + * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.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 + * iPAQ h1910 board which utilizes the Samsung K9F2808 part. This is + * a 128Mibit (16MiB x 8 bits) NAND flash device. + */ + +#include +#include +#include +#include +#include +#include +#include +#include /* for CLPS7111_VIRT_BASE */ +#include +#include +#include + +/* + * MTD structure for EDB7312 board + */ +static struct mtd_info *h1910_nand_mtd = NULL; + +/* + * Module stuff + */ + +/* + * Define static partitions for flash device + */ +static struct mtd_partition partition_info[] = { + {name:"h1910 NAND Flash", + offset:0, + size:16 * 1024 * 1024} +}; + +#define NUM_PARTITIONS 1 + +/* + * hardware specific access to control-lines + * + * NAND_NCE: bit 0 - don't care + * NAND_CLE: bit 1 - address bit 2 + * NAND_ALE: bit 2 - address bit 3 + */ +static void h1910_hwcontrol(struct mtd_info *mtd, int cmd, + unsigned int ctrl) +{ + struct nand_chip *chip = mtd->priv; + + if (cmd != NAND_CMD_NONE) + writeb(cmd, chip->IO_ADDR_W | ((ctrl & 0x6) << 1)); +} + +/* + * read device ready pin + */ +#if 0 +static int h1910_device_ready(struct mtd_info *mtd) +{ + return (GPLR(55) & GPIO_bit(55)); +} +#endif + +/* + * Main initialization routine + */ +static int __init h1910_init(void) +{ + struct nand_chip *this; + void __iomem *nandaddr; + + if (!machine_is_h1900()) + return -ENODEV; + + nandaddr = ioremap(0x08000000, 0x1000); + if (!nandaddr) { + printk("Failed to ioremap nand flash.\n"); + return -ENOMEM; + } + + /* Allocate memory for MTD device structure and private data */ + h1910_nand_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); + if (!h1910_nand_mtd) { + printk("Unable to allocate h1910 NAND MTD device structure.\n"); + iounmap((void *)nandaddr); + return -ENOMEM; + } + + /* Get pointer to private data */ + this = (struct nand_chip *)(&h1910_nand_mtd[1]); + + /* Initialize structures */ + memset(h1910_nand_mtd, 0, sizeof(struct mtd_info)); + memset(this, 0, sizeof(struct nand_chip)); + + /* Link the private data with the MTD structure */ + h1910_nand_mtd->priv = this; + h1910_nand_mtd->owner = THIS_MODULE; + + /* + * Enable VPEN + */ + GPSR(37) = GPIO_bit(37); + + /* insert callbacks */ + this->IO_ADDR_R = nandaddr; + this->IO_ADDR_W = nandaddr; + this->cmd_ctrl = h1910_hwcontrol; + this->dev_ready = NULL; /* unknown whether that was correct or not so we will just do it like this */ + /* 15 us command delay time */ + this->chip_delay = 50; + this->ecc.mode = NAND_ECC_SOFT; + this->options = NAND_NO_AUTOINCR; + + /* Scan to find existence of the device */ + if (nand_scan(h1910_nand_mtd, 1)) { + printk(KERN_NOTICE "No NAND device - returning -ENXIO\n"); + kfree(h1910_nand_mtd); + iounmap((void *)nandaddr); + return -ENXIO; + } + + /* Register the partitions */ + mtd_device_parse_register(h1910_nand_mtd, NULL, NULL, partition_info, + NUM_PARTITIONS); + + /* Return happy */ + return 0; +} + +module_init(h1910_init); + +/* + * Clean up routine + */ +static void __exit h1910_cleanup(void) +{ + struct nand_chip *this = (struct nand_chip *)&h1910_nand_mtd[1]; + + /* Release resources, unregister device */ + nand_release(h1910_nand_mtd); + + /* Release io resource */ + iounmap((void *)this->IO_ADDR_W); + + /* Free the MTD device structure */ + kfree(h1910_nand_mtd); +} + +module_exit(h1910_cleanup); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Joshua Wise "); +MODULE_DESCRIPTION("NAND flash driver for iPAQ h1910"); -- cgit