diff options
Diffstat (limited to 'linux-2.4.x/drivers/mtd/maps/integrator-flash.c')
| -rw-r--r-- | linux-2.4.x/drivers/mtd/maps/integrator-flash.c | 341 |
1 files changed, 126 insertions, 215 deletions
diff --git a/linux-2.4.x/drivers/mtd/maps/integrator-flash.c b/linux-2.4.x/drivers/mtd/maps/integrator-flash.c index cd58f8f..4882b6c 100644 --- a/linux-2.4.x/drivers/mtd/maps/integrator-flash.c +++ b/linux-2.4.x/drivers/mtd/maps/integrator-flash.c @@ -1,27 +1,28 @@ /*====================================================================== - drivers/mtd/maps/armflash.c: ARM Flash Layout/Partitioning - + drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver + Copyright (C) 2000 ARM Limited - + Copyright (C) 2003 Deep Blue Solutions Ltd. + This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - + 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 - - This is access code for flashes using ARM's flash partitioning + + This is access code for flashes using ARM's flash partitioning standards. - $Id: integrator-flash.c,v 1.7 2001/11/01 20:55:47 rmk Exp $ + $Id: integrator-flash.c,v 1.21 2005/11/29 20:01:28 gleixner Exp $ ======================================================================*/ @@ -31,268 +32,178 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/ioport.h> +#include <linux/platform_device.h> #include <linux/init.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> +#include <asm/mach/flash.h> #include <asm/hardware.h> #include <asm/io.h> #include <asm/system.h> -extern int parse_afs_partitions(struct mtd_info *, struct mtd_partition **); - -// board specific stuff - sorry, it should be in arch/arm/mach-*. -#ifdef CONFIG_ARCH_INTEGRATOR - -#define FLASH_BASE INTEGRATOR_FLASH_BASE -#define FLASH_SIZE INTEGRATOR_FLASH_SIZE - -#define FLASH_PART_SIZE 0x400000 - -#define SC_CTRLC (IO_ADDRESS(INTEGRATOR_SC_BASE) + INTEGRATOR_SC_CTRLC_OFFSET) -#define SC_CTRLS (IO_ADDRESS(INTEGRATOR_SC_BASE) + INTEGRATOR_SC_CTRLS_OFFSET) -#define EBI_CSR1 (IO_ADDRESS(INTEGRATOR_EBI_BASE) + INTEGRATOR_EBI_CSR1_OFFSET) -#define EBI_LOCK (IO_ADDRESS(INTEGRATOR_EBI_BASE) + INTEGRATOR_EBI_LOCK_OFFSET) - -/* - * Initialise the flash access systems: - * - Disable VPP - * - Assert WP - * - Set write enable bit in EBI reg - */ -static void armflash_flash_init(void) -{ - unsigned int tmp; - - __raw_writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP, SC_CTRLC); - - tmp = __raw_readl(EBI_CSR1) | INTEGRATOR_EBI_WRITE_ENABLE; - __raw_writel(tmp, EBI_CSR1); - - if (!(__raw_readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE)) { - __raw_writel(0xa05f, EBI_LOCK); - __raw_writel(tmp, EBI_CSR1); - __raw_writel(0, EBI_LOCK); - } -} - -/* - * Shutdown the flash access systems: - * - Disable VPP - * - Assert WP - * - Clear write enable bit in EBI reg - */ -static void armflash_flash_exit(void) -{ - unsigned int tmp; - - __raw_writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP, SC_CTRLC); - - /* - * Clear the write enable bit in system controller EBI register. - */ - tmp = __raw_readl(EBI_CSR1) & ~INTEGRATOR_EBI_WRITE_ENABLE; - __raw_writel(tmp, EBI_CSR1); - - if (__raw_readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE) { - __raw_writel(0xa05f, EBI_LOCK); - __raw_writel(tmp, EBI_CSR1); - __raw_writel(0, EBI_LOCK); - } -} - -static void armflash_flash_wp(int on) -{ - unsigned int reg; - - if (on) - reg = SC_CTRLC; - else - reg = SC_CTRLS; - - __raw_writel(INTEGRATOR_SC_CTRL_nFLWP, reg); -} - -static void armflash_set_vpp(struct map_info *map, int on) -{ - unsigned int reg; - - if (on) - reg = SC_CTRLS; - else - reg = SC_CTRLC; - - __raw_writel(INTEGRATOR_SC_CTRL_nFLVPPEN, reg); -} -#endif - #ifdef CONFIG_ARCH_P720T - #define FLASH_BASE (0x04000000) #define FLASH_SIZE (64*1024*1024) - -#define FLASH_PART_SIZE (4*1024*1024) -#define FLASH_BLOCK_SIZE (128*1024) - -static void armflash_flash_init(void) -{ -} - -static void armflash_flash_exit(void) -{ -} - -static void armflash_flash_wp(int on) -{ -} - -static void armflash_set_vpp(struct map_info *map, int on) -{ -} #endif -static __u8 armflash_read8(struct map_info *map, unsigned long ofs) -{ - return readb(ofs + map->map_priv_2); -} +struct armflash_info { + struct flash_platform_data *plat; + struct resource *res; + struct mtd_partition *parts; + struct mtd_info *mtd; + struct map_info map; +}; -static __u16 armflash_read16(struct map_info *map, unsigned long ofs) +static void armflash_set_vpp(struct map_info *map, int on) { - return readw(ofs + map->map_priv_2); -} + struct armflash_info *info = container_of(map, struct armflash_info, map); -static __u32 armflash_read32(struct map_info *map, unsigned long ofs) -{ - return readl(ofs + map->map_priv_2); + if (info->plat && info->plat->set_vpp) + info->plat->set_vpp(on); } -static void armflash_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) -{ - memcpy(to, (void *) (from + map->map_priv_2), len); -} +static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL }; -static void armflash_write8(struct map_info *map, __u8 d, unsigned long adr) +static int armflash_probe(struct platform_device *dev) { - writeb(d, adr + map->map_priv_2); -} + struct flash_platform_data *plat = dev->dev.platform_data; + struct resource *res = dev->resource; + unsigned int size = res->end - res->start + 1; + struct armflash_info *info; + int err; + void __iomem *base; -static void armflash_write16(struct map_info *map, __u16 d, unsigned long adr) -{ - writew(d, adr + map->map_priv_2); -} - -static void armflash_write32(struct map_info *map, __u32 d, unsigned long adr) -{ - writel(d, adr + map->map_priv_2); -} - -static void armflash_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len) -{ - memcpy((void *) (to + map->map_priv_2), from, len); -} + info = kmalloc(sizeof(struct armflash_info), GFP_KERNEL); + if (!info) { + err = -ENOMEM; + goto out; + } -static struct map_info armflash_map = -{ - name: "AFS", - read8: armflash_read8, - read16: armflash_read16, - read32: armflash_read32, - copy_from: armflash_copy_from, - write8: armflash_write8, - write16: armflash_write16, - write32: armflash_write32, - copy_to: armflash_copy_to, - set_vpp: armflash_set_vpp, -}; + memset(info, 0, sizeof(struct armflash_info)); -static struct mtd_info *mtd; -static struct mtd_partition *parts; + info->plat = plat; + if (plat && plat->init) { + err = plat->init(); + if (err) + goto no_resource; + } -static int __init armflash_cfi_init(void *base, u_int size) -{ - int ret; + info->res = request_mem_region(res->start, size, "armflash"); + if (!info->res) { + err = -EBUSY; + goto no_resource; + } - armflash_flash_init(); - armflash_flash_wp(1); + base = ioremap(res->start, size); + if (!base) { + err = -ENOMEM; + goto no_mem; + } /* * look for CFI based flash parts fitted to this board */ - armflash_map.size = size; - armflash_map.buswidth = 4; - armflash_map.map_priv_2 = (unsigned long) base; + info->map.size = size; + info->map.bankwidth = plat->width; + info->map.phys = res->start; + info->map.virt = base; + info->map.name = dev->dev.bus_id; + info->map.set_vpp = armflash_set_vpp; + + simple_map_init(&info->map); /* * Also, the CFI layer automatically works out what size * of chips we have, and does the necessary identification * for us automatically. */ - mtd = do_map_probe("cfi_probe", &armflash_map); - if (!mtd) - return -ENXIO; - - mtd->module = THIS_MODULE; - - ret = parse_afs_partitions(mtd, &parts); - if (ret > 0) { - ret = add_mtd_partitions(mtd, parts, ret); - if (ret) - printk(KERN_ERR "mtd partition registration " - "failed: %d\n", ret); + info->mtd = do_map_probe(plat->map_name, &info->map); + if (!info->mtd) { + err = -ENXIO; + goto no_device; } + info->mtd->owner = THIS_MODULE; + + err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0); + if (err > 0) { + err = add_mtd_partitions(info->mtd, info->parts, err); + if (err) + printk(KERN_ERR + "mtd partition registration failed: %d\n", err); + } + + if (err == 0) + platform_set_drvdata(dev, info); + /* * If we got an error, free all resources. */ - if (ret < 0) { - del_mtd_partitions(mtd); - map_destroy(mtd); + if (err < 0) { + if (info->mtd) { + del_mtd_partitions(info->mtd); + map_destroy(info->mtd); + } + kfree(info->parts); + + no_device: + iounmap(base); + no_mem: + release_mem_region(res->start, size); + no_resource: + if (plat && plat->exit) + plat->exit(); + kfree(info); } - - return ret; + out: + return err; } -static void armflash_cfi_exit(void) +static int armflash_remove(struct platform_device *dev) { - if (mtd) { - del_mtd_partitions(mtd); - map_destroy(mtd); - } - if (parts) - kfree(parts); -} + struct armflash_info *info = platform_get_drvdata(dev); -static int __init armflash_init(void) -{ - int err = -EBUSY; - void *base; + platform_set_drvdata(dev, NULL); - if (request_mem_region(FLASH_BASE, FLASH_SIZE, "flash") == NULL) - goto out; + if (info) { + if (info->mtd) { + del_mtd_partitions(info->mtd); + map_destroy(info->mtd); + } + kfree(info->parts); - base = ioremap(FLASH_BASE, FLASH_SIZE); - err = -ENOMEM; - if (base == NULL) - goto release; + iounmap(info->map.virt); + release_resource(info->res); + kfree(info->res); - err = armflash_cfi_init(base, FLASH_SIZE); - if (err) { - iounmap(base); -release: - release_mem_region(FLASH_BASE, FLASH_SIZE); + if (info->plat && info->plat->exit) + info->plat->exit(); + + kfree(info); } -out: - return err; + + return 0; +} + +static struct platform_driver armflash_driver = { + .probe = armflash_probe, + .remove = armflash_remove, + .driver = { + .name = "armflash", + }, +}; + +static int __init armflash_init(void) +{ + return platform_driver_register(&armflash_driver); } static void __exit armflash_exit(void) { - armflash_cfi_exit(); - iounmap((void *)armflash_map.map_priv_2); - release_mem_region(FLASH_BASE, FLASH_SIZE); - armflash_flash_exit(); + platform_driver_unregister(&armflash_driver); } module_init(armflash_init); |