/* * Remove a NAND device. */ static int __devexit at91_nand_remove(struct platform_device *pdev) { struct at91_nand_host *host = platform_get_drvdata(pdev); struct mtd_info *mtd = &host->mtd; nand_release(mtd); at91_nand_disable(host); iounmap(host->io_base); kfree(host); return 0; }
/* * Probe for the NAND device. */ static int __init at91_nand_probe(struct platform_device *pdev) { struct at91_nand_host *host; struct mtd_info *mtd; struct nand_chip *nand_chip; int res; #ifdef CONFIG_MTD_PARTITIONS struct mtd_partition *partitions = NULL; int num_partitions = 0; #endif /* Allocate memory for the device structure (and zero it) */ host = kzalloc(sizeof(struct at91_nand_host), GFP_KERNEL); if (!host) { printk(KERN_ERR "at91_nand: failed to allocate device structure.\n"); return -ENOMEM; } host->io_base = ioremap(pdev->resource[0].start, pdev->resource[0].end - pdev->resource[0].start + 1); if (host->io_base == NULL) { printk(KERN_ERR "at91_nand: ioremap failed\n"); kfree(host); return -EIO; } mtd = &host->mtd; nand_chip = &host->nand_chip; host->board = pdev->dev.platform_data; nand_chip->priv = host; /* link the private data structures */ mtd->priv = nand_chip; /* Set address of NAND IO lines */ nand_chip->IO_ADDR_R = host->io_base; nand_chip->IO_ADDR_W = host->io_base; nand_chip->hwcontrol = at91_nand_hwcontrol; nand_chip->dev_ready = at91_nand_device_ready; nand_chip->eccmode = NAND_ECC_SOFT; /* enable ECC */ nand_chip->chip_delay = 20; /* 20us command delay time */ platform_set_drvdata(pdev, host); at91_nand_enable(host); if (host->board->det_pin) { if (at91_get_gpio_value(host->board->det_pin)) { printk ("No SmartMedia card inserted.\n"); res = ENXIO; goto out; } } /* Scan to find existance of the device */ if (nand_scan(mtd, 1)) { res = -ENXIO; goto out; } #ifdef CONFIG_MTD_PARTITIONS if (host->board->partition_info) partitions = host->board->partition_info(mtd->size, &num_partitions); if ((!partitions) || (num_partitions == 0)) { printk(KERN_ERR "at91_nand: No parititions defined, or unsupported device.\n"); res = ENXIO; goto out; } res = add_mtd_partitions(mtd, partitions, num_partitions); #else res = add_mtd_device(mtd); #endif out: if (res) { at91_nand_disable(host); platform_set_drvdata(pdev, NULL); iounmap(host->io_base); kfree(host); } return res; }