From fcc31470c49e224ed8115c70541f599fc7568fee Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Sat, 3 Sep 2005 07:20:08 +0100 Subject: [PATCH] [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 Signed-off-by: Thomas Gleixner --- drivers/mtd/onenand/omap-onenand.c | 271 ++++++++++------------------- include/linux/mtd/onenand.h | 8 + 2 files changed, 97 insertions(+), 182 deletions(-) diff --git a/drivers/mtd/onenand/omap-onenand.c b/drivers/mtd/onenand/omap-onenand.c index 7c89549f7f58..57e69f184d33 100644 --- a/drivers/mtd/onenand/omap-onenand.c +++ b/drivers/mtd/onenand/omap-onenand.c @@ -4,236 +4,143 @@ * Copyright (c) 2005 Samsung Electronics * Kyungmin Park * - * Derived from linux/drivers/mtd/nand/omap-nand-flash.c - * * 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 OneNAND flash device for TI OMAP boards. + * This is a device driver for the OneNAND flash for OMAP boards. */ -#include -#include +#include #include +#include #include #include #include #include -#include -#include -#include -#include +#include -#define OMAP_ONENAND_FLASH_START1 OMAP_CS2A_PHYS -#define OMAP_ONENAND_FLASH_START2 omap_cs3_phys() -/* - * MTD structure for OMAP board - */ -static struct mtd_info *omap_onenand_mtd = NULL; +#define DRIVER_NAME "onenand" -/* - * Define partitions for flash devices - */ #ifdef CONFIG_MTD_PARTITIONS -static struct mtd_partition static_partition[] = { - { - .name = "X-Loader + U-Boot", - .offset = 0, - .size = SZ_128K, - .mask_flags = MTD_WRITEABLE /* force read-only */ - }, - { - .name = "U-Boot Environment", - .offset = MTDPART_OFS_APPEND, - .size = SZ_128K, - .mask_flags = MTD_WRITEABLE /* force read-only */ - }, - { - .name = "kernel", - .offset = MTDPART_OFS_APPEND, - .size = 2 * SZ_1M - }, - { - .name = "filesystem0", - .offset = MTDPART_OFS_APPEND, - .size = SZ_16M, - }, - { - .name = "filesystem1", - .offset = MTDPART_OFS_APPEND, - .size = MTDPART_SIZ_FULL, - }, -}; - static const char *part_probes[] = { "cmdlinepart", NULL, }; - #endif -#ifdef CONFIG_MTD_ONENAND_SYNC_READ -static unsigned int omap_emifs_cs; +struct omap_onenand_info { + struct mtd_info mtd; + struct mtd_partition *parts; + struct onenand_chip onenand; +}; -static void omap_find_emifs_cs(unsigned int addr) +static int __devinit omap_onenand_probe(struct device *dev) { - /* Check CS3 */ - if (OMAP_EMIFS_CONFIG_REG & OMAP_EMIFS_CONFIG_BM && addr == 0x0) { - omap_emifs_cs = 3; - } else { - omap_emifs_cs = (addr >> 26); + struct omap_onenand_info *info; + struct platform_device *pdev = to_platform_device(dev); + struct onenand_platform_data *pdata = pdev->dev.platform_data; + struct resource *res = pdev->resource; + unsigned long size = res->end - res->start + 1; + int err; + + info = kmalloc(sizeof(struct omap_onenand_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + memset(info, 0, sizeof(struct omap_onenand_info)); + + if (!request_mem_region(res->start, size, dev->driver->name)) { + err = -EBUSY; + goto out_free_info; } -} -/** - * omap_onenand_mmcontrol - Control OMAP EMIFS - */ -static void omap_onenand_mmcontrol(struct mtd_info *mtd, int sync_read) -{ - struct onenand_chip *this = mtd->priv; - static unsigned long omap_emifs_ccs, omap_emifs_acs; - static unsigned long onenand_sys_cfg1; - int config, emifs_ccs, emifs_acs; - - if (sync_read) { - /* - * Note: BRL and RDWST is equal - */ - omap_emifs_ccs = EMIFS_CCS(omap_emifs_cs); - omap_emifs_acs = EMIFS_ACS(omap_emifs_cs); - - emifs_ccs = 0x41141; - emifs_acs = 0x1; - - /* OneNAND System Configuration 1 */ - onenand_sys_cfg1 = this->read_word(this->base + ONENAND_REG_SYS_CFG1); - config = (onenand_sys_cfg1 - & ~(0x3f << ONENAND_SYS_CFG1_BL_SHIFT)) - | ONENAND_SYS_CFG1_SYNC_READ - | ONENAND_SYS_CFG1_BRL_4 - | ONENAND_SYS_CFG1_BL_8; - } else { - emifs_ccs = omap_emifs_ccs; - emifs_acs = omap_emifs_acs; - config = onenand_sys_cfg1; + info->onenand.base = ioremap(res->start, size); + if (!info->onenand.base) { + err = -ENOMEM; + goto out_release_mem_region; } - this->write_word(config, this->base + ONENAND_REG_SYS_CFG1); - EMIFS_CCS(omap_emifs_cs) = emifs_ccs; - EMIFS_ACS(omap_emifs_cs) = emifs_acs; -} -#else -#define omap_find_emifs_cs(x) do { } while (0) -#define omap_onenand_mmcontrol NULL -#endif + info->onenand.mmcontrol = pdata->mmcontrol; + info->mtd.name = pdev->dev.bus_id; + info->mtd.priv = &info->onenand; + info->mtd.owner = THIS_MODULE; -/* Scan to find existance of the device at base. - This also allocates oob and data internal buffers */ -static char onenand_name[] = "onenand"; - -/* - * Main initialization routine - */ -static int __init omap_onenand_init (void) -{ - struct onenand_chip *this; - struct mtd_partition *dynamic_partition = 0; - int err = 0; - - /* Allocate memory for MTD device structure and private data */ - omap_onenand_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct onenand_chip), - GFP_KERNEL); - if (!omap_onenand_mtd) { - printk (KERN_WARNING "Unable to allocate OneNAND MTD device structure.\n"); - err = -ENOMEM; - goto out; + if (onenand_scan(&info->mtd, 1)) { + err = -ENXIO; + goto out_iounmap; } - /* Get pointer to private data */ - this = (struct onenand_chip *) (&omap_onenand_mtd[1]); +#ifdef CONFIG_MTD_PARTITIONS + err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0); + if (err > 0) + add_mtd_partitions(&info->mtd, info->parts, err); + else if (err < 0 && pdata->parts) + add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts); + else +#endif + err = add_mtd_device(&info->mtd); - /* Initialize structures */ - memset((char *) omap_onenand_mtd, 0, sizeof(struct mtd_info) + sizeof(struct onenand_chip)); + dev_set_drvdata(&pdev->dev, info); - /* Link the private data with the MTD structure */ - omap_onenand_mtd->priv = this; - this->mmcontrol = omap_onenand_mmcontrol; + return 0; - /* try the first address */ - this->base = ioremap(OMAP_ONENAND_FLASH_START1, SZ_128K); - omap_find_emifs_cs(OMAP_ONENAND_FLASH_START1); +out_iounmap: + iounmap(info->onenand.base); +out_release_mem_region: + release_mem_region(res->start, size); +out_free_info: + kfree(info); - omap_onenand_mtd->name = onenand_name; - if (onenand_scan(omap_onenand_mtd, 1)){ - /* try the second address */ - iounmap(this->base); - this->base = ioremap(OMAP_ONENAND_FLASH_START2, SZ_128K); - omap_find_emifs_cs(OMAP_ONENAND_FLASH_START2); + return err; +} - if (onenand_scan(omap_onenand_mtd, 1)) { - iounmap(this->base); - err = -ENXIO; - goto out_mtd; - } - } +static int __devexit omap_onenand_remove(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct omap_onenand_info *info = dev_get_drvdata(&pdev->dev); + struct resource *res = pdev->resource; + unsigned long size = res->end - res->start + 1; - /* Register the partitions */ - switch (omap_onenand_mtd->size) { - case SZ_128M: - case SZ_64M: - case SZ_32M: -#ifdef CONFIG_MTD_PARTITIONS - err = parse_mtd_partitions(omap_onenand_mtd, part_probes, - &dynamic_partition, 0); - if (err > 0) - err = add_mtd_partitions(omap_onenand_mtd, - dynamic_partition, err); - else if (1) - err = add_mtd_partitions(omap_onenand_mtd, - static_partition, - ARRAY_SIZE(static_partition)); + dev_set_drvdata(&pdev->dev, NULL); + + if (info) { + if (info->parts) + del_mtd_partitions(&info->mtd); else -#endif - err = add_mtd_device(omap_onenand_mtd); - if (err) - goto out_buf; - break; + del_mtd_device(&info->mtd); - default: - printk(KERN_WARNING "Unsupported OneNAND device\n"); - err = -ENXIO; - goto out_buf; + onenand_release(&info->mtd); + release_mem_region(res->start, size); + iounmap(info->onenand.base); + kfree(info); } return 0; - -out_buf: - onenand_release(omap_onenand_mtd); - iounmap(this->base); -out_mtd: - kfree(omap_onenand_mtd); -out: - return err; } -/* - * Clean up routine - */ -static void __exit omap_onenand_cleanup (void) +static struct device_driver omap_onenand_driver = { + .name = DRIVER_NAME, + .bus = &platform_bus_type, + .probe = omap_onenand_probe, + .remove = __devexit_p(omap_onenand_remove), +}; + +MODULE_ALIAS(DRIVER_NAME); + +static int __init omap_onenand_init(void) { - struct onenand_chip *this = omap_onenand_mtd->priv; + return driver_register(&omap_onenand_driver); +} - /* onenand_release frees MTD partitions, MTD structure - and onenand internal buffers */ - onenand_release(omap_onenand_mtd); - iounmap(this->base); - kfree(omap_onenand_mtd); +static void __exit omap_onenand_exit(void) +{ + driver_unregister(&omap_onenand_driver); } module_init(omap_onenand_init); -module_exit(omap_onenand_cleanup); +module_exit(omap_onenand_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Kyungmin Park "); diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h index 89aaffbc9576..2c29a5ca2c91 100644 --- a/include/linux/mtd/onenand.h +++ b/include/linux/mtd/onenand.h @@ -115,10 +115,18 @@ struct onenand_chip { void *priv; }; +/* + * Helper macros + */ #define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index) #define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1) #define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1) +#define ONENAND_GET_SYS_CFG1(this) \ + (this->read_word(this->base + ONENAND_REG_SYS_CFG1)) +#define ONENAND_SET_SYS_CFG1(v, this) \ + (this->write_word(v, this->base + ONENAND_REG_SYS_CFG1)) + /* * Options bits */ -- 2.20.1