diff options
Diffstat (limited to 'arch/cris/arch-v32')
| -rw-r--r-- | arch/cris/arch-v32/drivers/nandflash.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/arch/cris/arch-v32/drivers/nandflash.c b/arch/cris/arch-v32/drivers/nandflash.c deleted file mode 100644 index 5ce015c..0000000 --- a/arch/cris/arch-v32/drivers/nandflash.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * arch/cris/arch-v32/drivers/nandflash.c - * - * Copyright (c) 2004 - * - * Derived from drivers/mtd/nand/spia.c - * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) - * - * $Id: nandflash.c,v 1.3 2005/06/01 10:57:12 starvik Exp $ - * - * 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/slab.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/nand.h> -#include <linux/mtd/partitions.h> -#include <asm/arch/memmap.h> -#include <asm/arch/hwregs/reg_map.h> -#include <asm/arch/hwregs/reg_rdwr.h> -#include <asm/arch/hwregs/gio_defs.h> -#include <asm/arch/hwregs/bif_core_defs.h> -#include <asm/io.h> - -#define CE_BIT 4 -#define CLE_BIT 5 -#define ALE_BIT 6 -#define BY_BIT 7 - -static struct mtd_info *crisv32_mtd = NULL; -/* - * hardware specific access to control-lines -*/ -static void crisv32_hwcontrol(struct mtd_info *mtd, int cmd) -{ - unsigned long flags; - reg_gio_rw_pa_dout dout = REG_RD(gio, regi_gio, rw_pa_dout); - - local_irq_save(flags); - switch(cmd){ - case NAND_CTL_SETCLE: - dout.data |= (1<<CLE_BIT); - break; - case NAND_CTL_CLRCLE: - dout.data &= ~(1<<CLE_BIT); - break; - case NAND_CTL_SETALE: - dout.data |= (1<<ALE_BIT); - break; - case NAND_CTL_CLRALE: - dout.data &= ~(1<<ALE_BIT); - break; - case NAND_CTL_SETNCE: - dout.data |= (1<<CE_BIT); - break; - case NAND_CTL_CLRNCE: - dout.data &= ~(1<<CE_BIT); - break; - } - REG_WR(gio, regi_gio, rw_pa_dout, dout); - local_irq_restore(flags); -} - -/* -* read device ready pin -*/ -int crisv32_device_ready(struct mtd_info *mtd) -{ - reg_gio_r_pa_din din = REG_RD(gio, regi_gio, r_pa_din); - return ((din.data & (1 << BY_BIT)) >> BY_BIT); -} - -/* - * Main initialization routine - */ -struct mtd_info* __init crisv32_nand_flash_probe (void) -{ - void __iomem *read_cs; - void __iomem *write_cs; - - reg_bif_core_rw_grp3_cfg bif_cfg = REG_RD(bif_core, regi_bif_core, rw_grp3_cfg); - reg_gio_rw_pa_oe pa_oe = REG_RD(gio, regi_gio, rw_pa_oe); - struct nand_chip *this; - int err = 0; - - /* Allocate memory for MTD device structure and private data */ - crisv32_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip), - GFP_KERNEL); - if (!crisv32_mtd) { - printk ("Unable to allocate CRISv32 NAND MTD device structure.\n"); - err = -ENOMEM; - return NULL; - } - - read_cs = ioremap(MEM_CSP0_START | MEM_NON_CACHEABLE, 8192); - write_cs = ioremap(MEM_CSP1_START | MEM_NON_CACHEABLE, 8192); - - if (!read_cs || !write_cs) { - printk("CRISv32 NAND ioremap failed\n"); - err = -EIO; - goto out_mtd; - } - - /* Get pointer to private data */ - this = (struct nand_chip *) (&crisv32_mtd[1]); - - pa_oe.oe |= 1 << CE_BIT; - pa_oe.oe |= 1 << ALE_BIT; - pa_oe.oe |= 1 << CLE_BIT; - pa_oe.oe &= ~ (1 << BY_BIT); - REG_WR(gio, regi_gio, rw_pa_oe, pa_oe); - - bif_cfg.gated_csp0 = regk_bif_core_rd; - bif_cfg.gated_csp1 = regk_bif_core_wr; - REG_WR(bif_core, regi_bif_core, rw_grp3_cfg, bif_cfg); - - /* Initialize structures */ - memset((char *) crisv32_mtd, 0, sizeof(struct mtd_info)); - memset((char *) this, 0, sizeof(struct nand_chip)); - - /* Link the private data with the MTD structure */ - crisv32_mtd->priv = this; - - /* Set address of NAND IO lines */ - this->IO_ADDR_R = read_cs; - this->IO_ADDR_W = write_cs; - this->hwcontrol = crisv32_hwcontrol; - this->dev_ready = crisv32_device_ready; - /* 20 us command delay time */ - this->chip_delay = 20; - this->eccmode = NAND_ECC_SOFT; - - /* Enable the following for a flash based bad block table */ - this->options = NAND_USE_FLASH_BBT; - - /* Scan to find existence of the device */ - if (nand_scan (crisv32_mtd, 1)) { - err = -ENXIO; - goto out_ior; - } - - return crisv32_mtd; - -out_ior: - iounmap((void *)read_cs); - iounmap((void *)write_cs); -out_mtd: - kfree (crisv32_mtd); - return NULL; -} - |