X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Fedb7312.c;h=1daf8231aaefc079885be293a7f598e88bb87401;hb=refs%2Fheads%2Fvserver;hp=db678bfb4b265fb87281272e01aeeb5c05f6567e;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git diff --git a/drivers/mtd/nand/edb7312.c b/drivers/mtd/nand/edb7312.c index db678bfb4..1daf8231a 100644 --- a/drivers/mtd/nand/edb7312.c +++ b/drivers/mtd/nand/edb7312.c @@ -1,12 +1,12 @@ /* * drivers/mtd/nand/edb7312.c * - * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) + * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) * * Derived from drivers/mtd/nand/autcpu12.c * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) * - * $Id: edb7312.c,v 1.5 2003/04/20 07:24:40 gleixner Exp $ + * $Id: edb7312.c,v 1.12 2005/11/07 11:14:30 gleixner 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 @@ -20,11 +20,12 @@ #include #include +#include #include #include #include #include -#include /* for CLPS7111_VIRT_BASE */ +#include /* for CLPS7111_VIRT_BASE */ #include #include @@ -52,180 +53,158 @@ static struct mtd_info *ep7312_mtd = NULL; * Module stuff */ -static int ep7312_fio_pbase = EP7312_FIO_PBASE; -static int ep7312_pxdr = EP7312_PXDR; -static int ep7312_pxddr = EP7312_PXDDR; - -#ifdef MODULE -MODULE_PARM(ep7312_fio_pbase, "i"); -MODULE_PARM(ep7312_pxdr, "i"); -MODULE_PARM(ep7312_pxddr, "i"); - -__setup("ep7312_fio_pbase=",ep7312_fio_pbase); -__setup("ep7312_pxdr=",ep7312_pxdr); -__setup("ep7312_pxddr=",ep7312_pxddr); -#endif +static unsigned long ep7312_fio_pbase = EP7312_FIO_PBASE; +static void __iomem *ep7312_pxdr = (void __iomem *)EP7312_PXDR; +static void __iomem *ep7312_pxddr = (void __iomem *)EP7312_PXDDR; #ifdef CONFIG_MTD_PARTITIONS /* * Define static partitions for flash device */ static struct mtd_partition partition_info[] = { - { .name = "EP7312 Nand Flash", - .offset = 0, - .size = 8*1024*1024 } + {.name = "EP7312 Nand Flash", + .offset = 0, + .size = 8 * 1024 * 1024} }; + #define NUM_PARTITIONS 1 #endif - -/* +/* * hardware specific access to control-lines + * + * NAND_NCE: bit 0 -> bit 7 + * NAND_CLE: bit 1 -> bit 4 + * NAND_ALE: bit 2 -> bit 5 */ -static void ep7312_hwcontrol(int cmd) +static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) { - switch(cmd) { - - case NAND_CTL_SETCLE: - clps_writeb(clps_readb(ep7312_pxdr) | 0x10, ep7312_pxdr); - break; - case NAND_CTL_CLRCLE: - clps_writeb(clps_readb(ep7312_pxdr) & ~0x10, ep7312_pxdr); - break; - - case NAND_CTL_SETALE: - clps_writeb(clps_readb(ep7312_pxdr) | 0x20, ep7312_pxdr); - break; - case NAND_CTL_CLRALE: - clps_writeb(clps_readb(ep7312_pxdr) & ~0x20, ep7312_pxdr); - break; - - case NAND_CTL_SETNCE: - clps_writeb((clps_readb(ep7312_pxdr) | 0x80) & ~0x40, ep7312_pxdr); - break; - case NAND_CTL_CLRNCE: - clps_writeb((clps_readb(ep7312_pxdr) | 0x80) | 0x40, ep7312_pxdr); - break; + struct nand_chip *chip = mtd->priv; + + if (ctrl & NAND_CTRL_CHANGE) { + unsigned char bits; + + bits = (ctrl & (NAND_CLE | NAND_ALE)) << 3; + bits = (ctrl & NAND_NCE) << 7; + + clps_writeb((clps_readb(ep7312_pxdr) & 0xB0) | 0x10, + ep7312_pxdr); } + if (cmd != NAND_CMD_NONE) + writeb(cmd, chip->IO_ADDR_W); } /* * read device ready pin */ -static int ep7312_device_ready(void) +static int ep7312_device_ready(struct mtd_info *mtd) { return 1; } +#ifdef CONFIG_MTD_PARTITIONS +const char *part_probes[] = { "cmdlinepart", NULL }; +#endif + /* * Main initialization routine */ -static int __init ep7312_init (void) +static int __init ep7312_init(void) { struct nand_chip *this; const char *part_type = 0; int mtd_parts_nb = 0; struct mtd_partition *mtd_parts = 0; - int ep7312_fio_base; - + void __iomem *ep7312_fio_base; + /* Allocate memory for MTD device structure and private data */ - ep7312_mtd = kmalloc(sizeof(struct mtd_info) + - sizeof(struct nand_chip), - GFP_KERNEL); + ep7312_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); if (!ep7312_mtd) { printk("Unable to allocate EDB7312 NAND MTD device structure.\n"); return -ENOMEM; } - + /* map physical adress */ - ep7312_fio_base = (unsigned long)ioremap(ep7312_fio_pbase, SZ_1K); - if(!ep7312_fio_base) { + ep7312_fio_base = ioremap(ep7312_fio_pbase, SZ_1K); + if (!ep7312_fio_base) { printk("ioremap EDB7312 NAND flash failed\n"); kfree(ep7312_mtd); return -EIO; } - + /* Get pointer to private data */ - this = (struct nand_chip *) (&ep7312_mtd[1]); - + this = (struct nand_chip *)(&ep7312_mtd[1]); + /* Initialize structures */ - memset((char *) ep7312_mtd, 0, sizeof(struct mtd_info)); - memset((char *) this, 0, sizeof(struct nand_chip)); - + memset(ep7312_mtd, 0, sizeof(struct mtd_info)); + memset(this, 0, sizeof(struct nand_chip)); + /* Link the private data with the MTD structure */ ep7312_mtd->priv = this; - + ep7312_mtd->owner = THIS_MODULE; + /* * Set GPIO Port B control register so that the pins are configured * to be outputs for controlling the NAND flash. */ clps_writeb(0xf0, ep7312_pxddr); - + /* insert callbacks */ this->IO_ADDR_R = ep7312_fio_base; this->IO_ADDR_W = ep7312_fio_base; - this->hwcontrol = ep7312_hwcontrol; + this->cmd_ctrl = ep7312_hwcontrol; this->dev_ready = ep7312_device_ready; /* 15 us command delay time */ this->chip_delay = 15; - + /* Scan to find existence of the device */ - if (nand_scan (ep7312_mtd)) { + if (nand_scan(ep7312_mtd, 1)) { iounmap((void *)ep7312_fio_base); - kfree (ep7312_mtd); + kfree(ep7312_mtd); return -ENXIO; } - - /* Allocate memory for internal data buffer */ - this->data_buf = kmalloc (sizeof(u_char) * (ep7312_mtd->oobblock + ep7312_mtd->oobsize), GFP_KERNEL); - if (!this->data_buf) { - printk("Unable to allocate NAND data buffer for EDB7312.\n"); - iounmap((void *)ep7312_fio_base); - kfree (ep7312_mtd); - return -ENOMEM; - } - -#ifdef CONFIG_MTD_CMDLINE_PARTS - mtd_parts_nb = parse_cmdline_partitions(ep7312_mtd, &mtd_parts, - "edb7312-nand"); +#ifdef CONFIG_MTD_PARTITIONS + ep7312_mtd->name = "edb7312-nand"; + mtd_parts_nb = parse_mtd_partitions(ep7312_mtd, part_probes, &mtd_parts, 0); if (mtd_parts_nb > 0) - part_type = "command line"; + part_type = "command line"; else - mtd_parts_nb = 0; + mtd_parts_nb = 0; #endif - if (mtd_parts_nb == 0) - { + if (mtd_parts_nb == 0) { mtd_parts = partition_info; mtd_parts_nb = NUM_PARTITIONS; part_type = "static"; } - + /* Register the partitions */ printk(KERN_NOTICE "Using %s partition definition\n", part_type); add_mtd_partitions(ep7312_mtd, mtd_parts, mtd_parts_nb); - + /* Return happy */ return 0; } + module_init(ep7312_init); /* * Clean up routine */ -static void __exit ep7312_cleanup (void) +static void __exit ep7312_cleanup(void) { - struct nand_chip *this = (struct nand_chip *) &ep7312_mtd[1]; - - /* Unregister the device */ - del_mtd_device (ep7312_mtd); - - /* Free internal data buffer */ - kfree (this->data_buf); - + struct nand_chip *this = (struct nand_chip *)&ep7312_mtd[1]; + + /* Release resources, unregister device */ + nand_release(ap7312_mtd); + + /* Release io resource */ + iounmap(this->IO_ADDR_R); + /* Free the MTD device structure */ - kfree (ep7312_mtd); + kfree(ep7312_mtd); } + module_exit(ep7312_cleanup); MODULE_LICENSE("GPL");