diff options
| -rw-r--r-- | arch/arm/mach-clps711x/autcpu12.c | 19 | ||||
| -rw-r--r-- | drivers/mtd/maps/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/mtd/maps/autcpu12-nvram.c | 150 |
3 files changed, 101 insertions, 70 deletions
diff --git a/arch/arm/mach-clps711x/autcpu12.c b/arch/arm/mach-clps711x/autcpu12.c index 3fb79a1d0bde..32871918bb6e 100644 --- a/arch/arm/mach-clps711x/autcpu12.c +++ b/arch/arm/mach-clps711x/autcpu12.c @@ -23,6 +23,8 @@ #include <linux/string.h> #include <linux/mm.h> #include <linux/io.h> +#include <linux/ioport.h> +#include <linux/platform_device.h> #include <mach/hardware.h> #include <asm/sizes.h> @@ -62,9 +64,26 @@ void __init autcpu12_map_io(void) iotable_init(autcpu12_io_desc, ARRAY_SIZE(autcpu12_io_desc)); } +static struct resource autcpu12_nvram_resource[] __initdata = { + DEFINE_RES_MEM_NAMED(AUTCPU12_PHYS_NVRAM, SZ_128K, "SRAM"), +}; + +static struct platform_device autcpu12_nvram_pdev __initdata = { + .name = "autcpu12_nvram", + .id = -1, + .resource = autcpu12_nvram_resource, + .num_resources = ARRAY_SIZE(autcpu12_nvram_resource), +}; + +static void __init autcpu12_init(void) +{ + platform_device_register(&autcpu12_nvram_pdev); +} + MACHINE_START(AUTCPU12, "autronix autcpu12") /* Maintainer: Thomas Gleixner */ .atag_offset = 0x20000, + .init_machine = autcpu12_init, .map_io = autcpu12_map_io, .init_irq = clps711x_init_irq, .timer = &clps711x_timer, diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index 53850f19db8c..dbe7df1149d3 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -373,7 +373,7 @@ config MTD_FORTUNET have such a board, say 'Y'. config MTD_AUTCPU12 - tristate "NV-RAM mapping AUTCPU12 board" + bool "NV-RAM mapping AUTCPU12 board" depends on ARCH_AUTCPU12 help This enables access to the NV-RAM on autronix autcpu12 board. diff --git a/drivers/mtd/maps/autcpu12-nvram.c b/drivers/mtd/maps/autcpu12-nvram.c index 0598d52eaf9f..ef420d984d1a 100644 --- a/drivers/mtd/maps/autcpu12-nvram.c +++ b/drivers/mtd/maps/autcpu12-nvram.c @@ -15,44 +15,57 @@ * 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 - * */ +#include <linux/sizes.h> -#include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> -#include <linux/ioport.h> #include <linux/init.h> -#include <asm/io.h> -#include <asm/sizes.h> -#include <mach/hardware.h> -#include <mach/autcpu12.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/platform_device.h> + #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> -#include <linux/mtd/partitions.h> - -static struct mtd_info *sram_mtd; - -struct map_info autcpu12_sram_map = { - .name = "SRAM", - .size = 32768, - .bankwidth = 4, - .phys = 0x12000000, +struct autcpu12_nvram_priv { + struct mtd_info *mtd; + struct map_info map; }; -static int __init init_autcpu12_sram (void) +static int __devinit autcpu12_nvram_probe(struct platform_device *pdev) { map_word tmp, save0, save1; + struct resource *res; + struct autcpu12_nvram_priv *priv; int err; - autcpu12_sram_map.virt = ioremap(0x12000000, SZ_128K); - if (!autcpu12_sram_map.virt) { - printk("Failed to ioremap autcpu12 NV-RAM space\n"); - err = -EIO; + priv = devm_kzalloc(&pdev->dev, + sizeof(struct autcpu12_nvram_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "failed to get memory resource\n"); + err = -ENOENT; + goto out; + } + + priv->map.bankwidth = 4; + priv->map.phys = res->start; + priv->map.size = resource_size(res); + priv->map.virt = devm_request_and_ioremap(&pdev->dev, res); + strcpy((char *)priv->map.name, res->name); + if (!priv->map.virt) { + dev_err(&pdev->dev, "failed to remap mem resource\n"); + err = -EBUSY; goto out; } - simple_map_init(&autcpu12_sram_map); + + simple_map_init(&priv->map); /* * Check for 32K/128K @@ -62,67 +75,66 @@ static int __init init_autcpu12_sram (void) * Read and check result on ofs 0x0 * Restore contents */ - save0 = map_read(&autcpu12_sram_map, 0); - save1 = map_read(&autcpu12_sram_map, 0x10000); + save0 = map_read(&priv->map, 0); + save1 = map_read(&priv->map, 0x10000); tmp.x[0] = ~save0.x[0]; - map_write(&autcpu12_sram_map, tmp, 0x10000); - /* if we find this pattern on 0x0, we have 32K size - * restore contents and exit - */ - tmp = map_read(&autcpu12_sram_map, 0); - if (!map_word_equal(&autcpu12_sram_map, tmp, save0)) { - map_write(&autcpu12_sram_map, save0, 0x0); - goto map; - } - /* We have a 128K found, restore 0x10000 and set size - * to 128K - */ - map_write(&autcpu12_sram_map, save1, 0x10000); - autcpu12_sram_map.size = SZ_128K; - -map: - sram_mtd = do_map_probe("map_ram", &autcpu12_sram_map); - if (!sram_mtd) { - printk("NV-RAM probe failed\n"); + map_write(&priv->map, tmp, 0x10000); + tmp = map_read(&priv->map, 0); + /* if we find this pattern on 0x0, we have 32K size */ + if (!map_word_equal(&priv->map, tmp, save0)) { + map_write(&priv->map, save0, 0x0); + priv->map.size = SZ_32K; + } else + map_write(&priv->map, save1, 0x10000); + + priv->mtd = do_map_probe("map_ram", &priv->map); + if (!priv->mtd) { + dev_err(&pdev->dev, "probing failed\n"); err = -ENXIO; - goto out_ioremap; + goto out; } - sram_mtd->owner = THIS_MODULE; - sram_mtd->erasesize = 16; - - if (mtd_device_register(sram_mtd, NULL, 0)) { - printk("NV-RAM device addition failed\n"); - err = -ENOMEM; - goto out_probe; + priv->mtd->owner = THIS_MODULE; + priv->mtd->erasesize = 16; + priv->mtd->dev.parent = &pdev->dev; + if (!mtd_device_register(priv->mtd, NULL, 0)) { + dev_info(&pdev->dev, + "NV-RAM device size %ldKiB registered on AUTCPU12\n", + priv->map.size / SZ_1K); + return 0; } - printk("NV-RAM device size %ldKiB registered on AUTCPU12\n",autcpu12_sram_map.size/SZ_1K); - - return 0; - -out_probe: - map_destroy(sram_mtd); - sram_mtd = 0; + map_destroy(priv->mtd); + dev_err(&pdev->dev, "NV-RAM device addition failed\n"); + err = -ENOMEM; -out_ioremap: - iounmap((void *)autcpu12_sram_map.virt); out: + devm_kfree(&pdev->dev, priv); + return err; } -static void __exit cleanup_autcpu12_maps(void) +static int __devexit autcpu12_nvram_remove(struct platform_device *pdev) { - if (sram_mtd) { - mtd_device_unregister(sram_mtd); - map_destroy(sram_mtd); - iounmap((void *)autcpu12_sram_map.virt); - } + struct autcpu12_nvram_priv *priv = platform_get_drvdata(pdev); + + mtd_device_unregister(priv->mtd); + map_destroy(priv->mtd); + devm_kfree(&pdev->dev, priv); + + return 0; } -module_init(init_autcpu12_sram); -module_exit(cleanup_autcpu12_maps); +static struct platform_driver autcpu12_nvram_driver = { + .driver = { + .name = "autcpu12_nvram", + .owner = THIS_MODULE, + }, + .probe = autcpu12_nvram_probe, + .remove = __devexit_p(autcpu12_nvram_remove), +}; +module_platform_driver(autcpu12_nvram_driver); MODULE_AUTHOR("Thomas Gleixner"); -MODULE_DESCRIPTION("autcpu12 NV-RAM map driver"); +MODULE_DESCRIPTION("autcpu12 NVRAM map driver"); MODULE_LICENSE("GPL"); |