diff options
Diffstat (limited to 'drivers/mtd/nand/pasemi_nand.c')
| -rw-r--r-- | drivers/mtd/nand/pasemi_nand.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/drivers/mtd/nand/pasemi_nand.c b/drivers/mtd/nand/pasemi_nand.c deleted file mode 100644 index a47a7e4bd25a..000000000000 --- a/drivers/mtd/nand/pasemi_nand.c +++ /dev/null @@ -1,232 +0,0 @@ -/* - * Copyright (C) 2006-2007 PA Semi, Inc - * - * Author: Egor Martovetsky <egor@pasemi.com> - * Maintained by: Olof Johansson <olof@lixom.net> - * - * Driver for the PWRficient onchip NAND flash interface - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#undef DEBUG - -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/rawnand.h> -#include <linux/mtd/nand_ecc.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/of_platform.h> -#include <linux/platform_device.h> -#include <linux/pci.h> - -#include <asm/io.h> - -#define LBICTRL_LPCCTL_NR 0x00004000 -#define CLE_PIN_CTL 15 -#define ALE_PIN_CTL 14 - -static unsigned int lpcctl; -static struct mtd_info *pasemi_nand_mtd; -static const char driver_name[] = "pasemi-nand"; - -static void pasemi_read_buf(struct mtd_info *mtd, u_char *buf, int len) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - - while (len > 0x800) { - memcpy_fromio(buf, chip->IO_ADDR_R, 0x800); - buf += 0x800; - len -= 0x800; - } - memcpy_fromio(buf, chip->IO_ADDR_R, len); -} - -static void pasemi_write_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - - while (len > 0x800) { - memcpy_toio(chip->IO_ADDR_R, buf, 0x800); - buf += 0x800; - len -= 0x800; - } - memcpy_toio(chip->IO_ADDR_R, buf, len); -} - -static void pasemi_hwcontrol(struct mtd_info *mtd, int cmd, - unsigned int ctrl) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - - if (cmd == NAND_CMD_NONE) - return; - - if (ctrl & NAND_CLE) - out_8(chip->IO_ADDR_W + (1 << CLE_PIN_CTL), cmd); - else - out_8(chip->IO_ADDR_W + (1 << ALE_PIN_CTL), cmd); - - /* Push out posted writes */ - eieio(); - inl(lpcctl); -} - -int pasemi_device_ready(struct mtd_info *mtd) -{ - return !!(inl(lpcctl) & LBICTRL_LPCCTL_NR); -} - -static int pasemi_nand_probe(struct platform_device *ofdev) -{ - struct device *dev = &ofdev->dev; - struct pci_dev *pdev; - struct device_node *np = dev->of_node; - struct resource res; - struct nand_chip *chip; - int err = 0; - - err = of_address_to_resource(np, 0, &res); - - if (err) - return -EINVAL; - - /* We only support one device at the moment */ - if (pasemi_nand_mtd) - return -ENODEV; - - dev_dbg(dev, "pasemi_nand at %pR\n", &res); - - /* Allocate memory for MTD device structure and private data */ - chip = kzalloc(sizeof(struct nand_chip), GFP_KERNEL); - if (!chip) { - err = -ENOMEM; - goto out; - } - - pasemi_nand_mtd = nand_to_mtd(chip); - - /* Link the private data with the MTD structure */ - pasemi_nand_mtd->dev.parent = dev; - - chip->IO_ADDR_R = of_iomap(np, 0); - chip->IO_ADDR_W = chip->IO_ADDR_R; - - if (!chip->IO_ADDR_R) { - err = -EIO; - goto out_mtd; - } - - pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa008, NULL); - if (!pdev) { - err = -ENODEV; - goto out_ior; - } - - lpcctl = pci_resource_start(pdev, 0); - pci_dev_put(pdev); - - if (!request_region(lpcctl, 4, driver_name)) { - err = -EBUSY; - goto out_ior; - } - - chip->cmd_ctrl = pasemi_hwcontrol; - chip->dev_ready = pasemi_device_ready; - chip->read_buf = pasemi_read_buf; - chip->write_buf = pasemi_write_buf; - chip->chip_delay = 0; - chip->ecc.mode = NAND_ECC_SOFT; - chip->ecc.algo = NAND_ECC_HAMMING; - - /* Enable the following for a flash based bad block table */ - chip->bbt_options = NAND_BBT_USE_FLASH; - - /* Scan to find existence of the device */ - err = nand_scan(pasemi_nand_mtd, 1); - if (err) - goto out_lpc; - - if (mtd_device_register(pasemi_nand_mtd, NULL, 0)) { - dev_err(dev, "Unable to register MTD device\n"); - err = -ENODEV; - goto out_lpc; - } - - dev_info(dev, "PA Semi NAND flash at %pR, control at I/O %x\n", &res, - lpcctl); - - return 0; - - out_lpc: - release_region(lpcctl, 4); - out_ior: - iounmap(chip->IO_ADDR_R); - out_mtd: - kfree(chip); - out: - return err; -} - -static int pasemi_nand_remove(struct platform_device *ofdev) -{ - struct nand_chip *chip; - - if (!pasemi_nand_mtd) - return 0; - - chip = mtd_to_nand(pasemi_nand_mtd); - - /* Release resources, unregister device */ - nand_release(pasemi_nand_mtd); - - release_region(lpcctl, 4); - - iounmap(chip->IO_ADDR_R); - - /* Free the MTD device structure */ - kfree(chip); - - pasemi_nand_mtd = NULL; - - return 0; -} - -static const struct of_device_id pasemi_nand_match[] = -{ - { - .compatible = "pasemi,localbus-nand", - }, - {}, -}; - -MODULE_DEVICE_TABLE(of, pasemi_nand_match); - -static struct platform_driver pasemi_nand_driver = -{ - .driver = { - .name = driver_name, - .of_match_table = pasemi_nand_match, - }, - .probe = pasemi_nand_probe, - .remove = pasemi_nand_remove, -}; - -module_platform_driver(pasemi_nand_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>"); -MODULE_DESCRIPTION("NAND flash interface driver for PA Semi PWRficient"); |