static int platram_remove(struct platform_device *pdev) { struct platram_info *info = to_platram_info(pdev); dev_dbg(&pdev->dev, "removing device\n"); if (info == NULL) return 0; if (info->mtd) { mtd_device_unregister(info->mtd); map_destroy(info->mtd); } /* ensure ram is left read-only */ platram_setrw(info, PLATRAM_RO); /* release resources */ if (info->area) { release_resource(info->area); kfree(info->area); } if (info->map.virt != NULL) iounmap(info->map.virt); kfree(info); return 0; }
static int platram_remove(struct platform_device *pdev) { struct platram_info *info = to_platram_info(pdev); platform_set_drvdata(pdev, NULL); dev_dbg(&pdev->dev, "removing device\n"); if (info == NULL) return 0; if (info->mtd) { #ifdef CONFIG_MTD_PARTITIONS if (info->partitions) { del_mtd_partitions(info->mtd); kfree(info->partitions); } #endif del_mtd_device(info->mtd); map_destroy(info->mtd); } /* ensure ram is left read-only */ platram_setrw(info, PLATRAM_RO); /* release resources */ if (info->area) { release_resource(info->area); kfree(info->area); } if (info->map.virt != NULL) iounmap(info->map.virt); kfree(info); return 0; }
static int platram_probe(struct platform_device *pdev) { struct platdata_mtd_ram *pdata; struct platram_info *info; struct resource *res; int err = 0; dev_dbg(&pdev->dev, "probe entered\n"); if (dev_get_platdata(&pdev->dev) == NULL) { dev_err(&pdev->dev, "no platform data supplied\n"); err = -ENOENT; goto exit_error; } pdata = dev_get_platdata(&pdev->dev); info = kzalloc(sizeof(*info), GFP_KERNEL); if (info == NULL) { err = -ENOMEM; goto exit_error; } platform_set_drvdata(pdev, info); info->dev = &pdev->dev; info->pdata = pdata; /* get the resource for the memory mapping */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "no memory resource specified\n"); err = -ENOENT; goto exit_free; } dev_dbg(&pdev->dev, "got platform resource %p (0x%llx)\n", res, (unsigned long long)res->start); /* setup map parameters */ info->map.phys = res->start; info->map.size = resource_size(res); info->map.name = pdata->mapname != NULL ? (char *)pdata->mapname : (char *)pdev->name; info->map.bankwidth = pdata->bankwidth; /* register our usage of the memory area */ info->area = request_mem_region(res->start, info->map.size, pdev->name); if (info->area == NULL) { dev_err(&pdev->dev, "failed to request memory region\n"); err = -EIO; goto exit_free; } /* remap the memory area */ info->map.virt = ioremap(res->start, info->map.size); dev_dbg(&pdev->dev, "virt %p, %lu bytes\n", info->map.virt, info->map.size); if (info->map.virt == NULL) { dev_err(&pdev->dev, "failed to ioremap() region\n"); err = -EIO; goto exit_free; } simple_map_init(&info->map); dev_dbg(&pdev->dev, "initialised map, probing for mtd\n"); /* probe for the right mtd map driver * supplied by the platform_data struct */ if (pdata->map_probes) { const char * const *map_probes = pdata->map_probes; for ( ; !info->mtd && *map_probes; map_probes++) info->mtd = do_map_probe(*map_probes , &info->map); } /* fallback to map_ram */ else info->mtd = do_map_probe("map_ram", &info->map); if (info->mtd == NULL) { dev_err(&pdev->dev, "failed to probe for map_ram\n"); err = -ENOMEM; goto exit_free; } info->mtd->owner = THIS_MODULE; info->mtd->dev.parent = &pdev->dev; platram_setrw(info, PLATRAM_RW); /* check to see if there are any available partitions, or whether * to add this device whole */ err = mtd_device_parse_register(info->mtd, pdata->probes, NULL, pdata->partitions, pdata->nr_partitions); if (!err) dev_info(&pdev->dev, "registered mtd device\n"); if (pdata->nr_partitions) { /* add the whole device. */ err = mtd_device_register(info->mtd, NULL, 0); if (err) { dev_err(&pdev->dev, "failed to register the entire device\n"); } } return err; exit_free: platram_remove(pdev); exit_error: return err; }
static int platram_probe(struct platform_device *pdev) { struct platdata_mtd_ram *pdata; struct platram_info *info; struct resource *res; int err = 0; dev_dbg(&pdev->dev, "probe entered\n"); if (pdev->dev.platform_data == NULL) { dev_err(&pdev->dev, "no platform data supplied\n"); err = -ENOENT; goto exit_error; } pdata = pdev->dev.platform_data; info = kzalloc(sizeof(*info), GFP_KERNEL); if (info == NULL) { dev_err(&pdev->dev, "no memory for flash info\n"); err = -ENOMEM; goto exit_error; } platform_set_drvdata(pdev, info); info->dev = &pdev->dev; info->pdata = pdata; /* get the resource for the memory mapping */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "no memory resource specified\n"); err = -ENOENT; goto exit_free; } dev_dbg(&pdev->dev, "got platform resource %p (0x%lx)\n", res, res->start); /* setup map parameters */ info->map.phys = res->start; info->map.size = (res->end - res->start) + 1; info->map.name = pdata->mapname != NULL ? pdata->mapname : (char *)pdev->name; info->map.bankwidth = pdata->bankwidth; /* register our usage of the memory area */ info->area = request_mem_region(res->start, info->map.size, pdev->name); if (info->area == NULL) { dev_err(&pdev->dev, "failed to request memory region\n"); err = -EIO; goto exit_free; } /* remap the memory area */ info->map.virt = ioremap(res->start, info->map.size); dev_dbg(&pdev->dev, "virt %p, %lu bytes\n", info->map.virt, info->map.size); if (info->map.virt == NULL) { dev_err(&pdev->dev, "failed to ioremap() region\n"); err = -EIO; goto exit_free; } simple_map_init(&info->map); dev_dbg(&pdev->dev, "initialised map, probing for mtd\n"); /* probe for the right mtd map driver */ info->mtd = do_map_probe("map_ram" , &info->map); if (info->mtd == NULL) { dev_err(&pdev->dev, "failed to probe for map_ram\n"); err = -ENOMEM; goto exit_free; } info->mtd->owner = THIS_MODULE; platram_setrw(info, PLATRAM_RW); /* check to see if there are any available partitions, or wether * to add this device whole */ #ifdef CONFIG_MTD_PARTITIONS if (pdata->nr_partitions > 0) { const char **probes = { NULL }; if (pdata->probes) probes = (const char **)pdata->probes; err = parse_mtd_partitions(info->mtd, probes, &info->partitions, 0); if (err > 0) { err = add_mtd_partitions(info->mtd, info->partitions, err); } } #endif /* CONFIG_MTD_PARTITIONS */ if (add_mtd_device(info->mtd)) { dev_err(&pdev->dev, "add_mtd_device() failed\n"); err = -ENOMEM; } dev_info(&pdev->dev, "registered mtd device\n"); return err; exit_free: platram_remove(pdev); exit_error: return err; }