[PATCH] OneNAND: Update OMAP OneNAND mapping using device driver model
- Update OMAP OneNAND mapping file using device driver model - Remove board specific macro and values. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Kyungmin Park
Thomas Gleixner
parent
cdc001305d
commit
fcc31470c4
2 changed files with 102 additions and 187 deletions
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@ -4,236 +4,143 @@
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* Copyright (c) 2005 Samsung Electronics
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* Kyungmin Park <kyungmin.park@samsung.com>
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*
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* Derived from linux/drivers/mtd/nand/omap-nand-flash.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Overview:
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* This is a device driver for the OneNAND flash device for TI OMAP boards.
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* This is a device driver for the OneNAND flash for OMAP boards.
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*/
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/onenand.h>
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#include <linux/mtd/partitions.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/tc.h>
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#include <asm/sizes.h>
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#include <asm/mach-types.h>
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#include <asm/mach/flash.h>
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#define OMAP_ONENAND_FLASH_START1 OMAP_CS2A_PHYS
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#define OMAP_ONENAND_FLASH_START2 omap_cs3_phys()
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/*
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* MTD structure for OMAP board
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*/
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static struct mtd_info *omap_onenand_mtd = NULL;
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#define DRIVER_NAME "onenand"
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/*
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* Define partitions for flash devices
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*/
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#ifdef CONFIG_MTD_PARTITIONS
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static struct mtd_partition static_partition[] = {
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{
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.name = "X-Loader + U-Boot",
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.offset = 0,
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.size = SZ_128K,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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},
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{
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.name = "U-Boot Environment",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_128K,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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},
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{
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.name = "kernel",
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.offset = MTDPART_OFS_APPEND,
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.size = 2 * SZ_1M
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},
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{
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.name = "filesystem0",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_16M,
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},
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{
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.name = "filesystem1",
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.offset = MTDPART_OFS_APPEND,
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.size = MTDPART_SIZ_FULL,
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},
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static const char *part_probes[] = { "cmdlinepart", NULL, };
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#endif
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struct omap_onenand_info {
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struct mtd_info mtd;
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struct mtd_partition *parts;
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struct onenand_chip onenand;
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};
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static const char *part_probes[] = { "cmdlinepart", NULL, };
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#endif
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#ifdef CONFIG_MTD_ONENAND_SYNC_READ
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static unsigned int omap_emifs_cs;
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static void omap_find_emifs_cs(unsigned int addr)
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static int __devinit omap_onenand_probe(struct device *dev)
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{
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/* Check CS3 */
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if (OMAP_EMIFS_CONFIG_REG & OMAP_EMIFS_CONFIG_BM && addr == 0x0) {
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omap_emifs_cs = 3;
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} else {
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omap_emifs_cs = (addr >> 26);
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}
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}
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struct omap_onenand_info *info;
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struct platform_device *pdev = to_platform_device(dev);
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struct onenand_platform_data *pdata = pdev->dev.platform_data;
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struct resource *res = pdev->resource;
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unsigned long size = res->end - res->start + 1;
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int err;
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/**
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* omap_onenand_mmcontrol - Control OMAP EMIFS
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*/
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static void omap_onenand_mmcontrol(struct mtd_info *mtd, int sync_read)
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{
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struct onenand_chip *this = mtd->priv;
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static unsigned long omap_emifs_ccs, omap_emifs_acs;
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static unsigned long onenand_sys_cfg1;
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int config, emifs_ccs, emifs_acs;
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info = kmalloc(sizeof(struct omap_onenand_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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if (sync_read) {
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/*
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* Note: BRL and RDWST is equal
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*/
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omap_emifs_ccs = EMIFS_CCS(omap_emifs_cs);
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omap_emifs_acs = EMIFS_ACS(omap_emifs_cs);
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emifs_ccs = 0x41141;
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emifs_acs = 0x1;
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memset(info, 0, sizeof(struct omap_onenand_info));
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/* OneNAND System Configuration 1 */
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onenand_sys_cfg1 = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
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config = (onenand_sys_cfg1
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& ~(0x3f << ONENAND_SYS_CFG1_BL_SHIFT))
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| ONENAND_SYS_CFG1_SYNC_READ
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| ONENAND_SYS_CFG1_BRL_4
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| ONENAND_SYS_CFG1_BL_8;
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} else {
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emifs_ccs = omap_emifs_ccs;
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emifs_acs = omap_emifs_acs;
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config = onenand_sys_cfg1;
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if (!request_mem_region(res->start, size, dev->driver->name)) {
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err = -EBUSY;
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goto out_free_info;
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}
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this->write_word(config, this->base + ONENAND_REG_SYS_CFG1);
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EMIFS_CCS(omap_emifs_cs) = emifs_ccs;
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EMIFS_ACS(omap_emifs_cs) = emifs_acs;
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}
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#else
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#define omap_find_emifs_cs(x) do { } while (0)
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#define omap_onenand_mmcontrol NULL
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#endif
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/* Scan to find existance of the device at base.
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This also allocates oob and data internal buffers */
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static char onenand_name[] = "onenand";
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/*
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* Main initialization routine
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*/
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static int __init omap_onenand_init (void)
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{
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struct onenand_chip *this;
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struct mtd_partition *dynamic_partition = 0;
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int err = 0;
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/* Allocate memory for MTD device structure and private data */
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omap_onenand_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct onenand_chip),
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GFP_KERNEL);
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if (!omap_onenand_mtd) {
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printk (KERN_WARNING "Unable to allocate OneNAND MTD device structure.\n");
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info->onenand.base = ioremap(res->start, size);
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if (!info->onenand.base) {
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err = -ENOMEM;
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goto out;
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goto out_release_mem_region;
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}
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/* Get pointer to private data */
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this = (struct onenand_chip *) (&omap_onenand_mtd[1]);
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info->onenand.mmcontrol = pdata->mmcontrol;
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/* Initialize structures */
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memset((char *) omap_onenand_mtd, 0, sizeof(struct mtd_info) + sizeof(struct onenand_chip));
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info->mtd.name = pdev->dev.bus_id;
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info->mtd.priv = &info->onenand;
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info->mtd.owner = THIS_MODULE;
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/* Link the private data with the MTD structure */
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omap_onenand_mtd->priv = this;
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this->mmcontrol = omap_onenand_mmcontrol;
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/* try the first address */
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this->base = ioremap(OMAP_ONENAND_FLASH_START1, SZ_128K);
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omap_find_emifs_cs(OMAP_ONENAND_FLASH_START1);
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omap_onenand_mtd->name = onenand_name;
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if (onenand_scan(omap_onenand_mtd, 1)){
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/* try the second address */
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iounmap(this->base);
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this->base = ioremap(OMAP_ONENAND_FLASH_START2, SZ_128K);
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omap_find_emifs_cs(OMAP_ONENAND_FLASH_START2);
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if (onenand_scan(omap_onenand_mtd, 1)) {
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iounmap(this->base);
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err = -ENXIO;
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goto out_mtd;
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}
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}
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/* Register the partitions */
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switch (omap_onenand_mtd->size) {
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case SZ_128M:
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case SZ_64M:
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case SZ_32M:
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#ifdef CONFIG_MTD_PARTITIONS
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err = parse_mtd_partitions(omap_onenand_mtd, part_probes,
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&dynamic_partition, 0);
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if (err > 0)
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err = add_mtd_partitions(omap_onenand_mtd,
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dynamic_partition, err);
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else if (1)
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err = add_mtd_partitions(omap_onenand_mtd,
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static_partition,
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ARRAY_SIZE(static_partition));
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else
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#endif
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err = add_mtd_device(omap_onenand_mtd);
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if (err)
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goto out_buf;
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break;
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default:
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printk(KERN_WARNING "Unsupported OneNAND device\n");
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if (onenand_scan(&info->mtd, 1)) {
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err = -ENXIO;
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goto out_buf;
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goto out_iounmap;
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}
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#ifdef CONFIG_MTD_PARTITIONS
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err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
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if (err > 0)
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add_mtd_partitions(&info->mtd, info->parts, err);
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else if (err < 0 && pdata->parts)
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add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
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else
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#endif
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err = add_mtd_device(&info->mtd);
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dev_set_drvdata(&pdev->dev, info);
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return 0;
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out_buf:
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onenand_release(omap_onenand_mtd);
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iounmap(this->base);
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out_mtd:
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kfree(omap_onenand_mtd);
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out:
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out_iounmap:
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iounmap(info->onenand.base);
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out_release_mem_region:
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release_mem_region(res->start, size);
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out_free_info:
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kfree(info);
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return err;
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}
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/*
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* Clean up routine
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*/
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static void __exit omap_onenand_cleanup (void)
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static int __devexit omap_onenand_remove(struct device *dev)
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{
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struct onenand_chip *this = omap_onenand_mtd->priv;
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struct platform_device *pdev = to_platform_device(dev);
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struct omap_onenand_info *info = dev_get_drvdata(&pdev->dev);
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struct resource *res = pdev->resource;
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unsigned long size = res->end - res->start + 1;
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/* onenand_release frees MTD partitions, MTD structure
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and onenand internal buffers */
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onenand_release(omap_onenand_mtd);
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iounmap(this->base);
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kfree(omap_onenand_mtd);
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dev_set_drvdata(&pdev->dev, NULL);
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if (info) {
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if (info->parts)
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del_mtd_partitions(&info->mtd);
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else
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del_mtd_device(&info->mtd);
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onenand_release(&info->mtd);
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release_mem_region(res->start, size);
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iounmap(info->onenand.base);
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kfree(info);
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}
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return 0;
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}
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static struct device_driver omap_onenand_driver = {
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.name = DRIVER_NAME,
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.bus = &platform_bus_type,
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.probe = omap_onenand_probe,
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.remove = __devexit_p(omap_onenand_remove),
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};
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MODULE_ALIAS(DRIVER_NAME);
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static int __init omap_onenand_init(void)
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{
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return driver_register(&omap_onenand_driver);
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}
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static void __exit omap_onenand_exit(void)
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{
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driver_unregister(&omap_onenand_driver);
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}
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module_init(omap_onenand_init);
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module_exit(omap_onenand_cleanup);
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module_exit(omap_onenand_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
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@ -115,10 +115,18 @@ struct onenand_chip {
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void *priv;
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};
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/*
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* Helper macros
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*/
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#define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
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#define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
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#define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
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#define ONENAND_GET_SYS_CFG1(this) \
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(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
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#define ONENAND_SET_SYS_CFG1(v, this) \
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(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
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/*
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* Options bits
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*/
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