1 // SPDX-License-Identifier: GPL-2.0-only
3  * Generic NAND driver
24 	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_SOFT &&  in plat_nand_attach_chip()
25 	    chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)  in plat_nand_attach_chip()
26 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;  in plat_nand_attach_chip()
36  * Probe for the NAND device.
40 	struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);  in plat_nand_probe()
47 		dev_err(&pdev->dev, "platform_nand_data is missing\n");  in plat_nand_probe()
48 		return -EINVAL;  in plat_nand_probe()
51 	if (pdata->chip.nr_chips < 1) {  in plat_nand_probe()
52 		dev_err(&pdev->dev, "invalid number of chips specified\n");  in plat_nand_probe()
53 		return -EINVAL;  in plat_nand_probe()
57 	data = devm_kzalloc(&pdev->dev, sizeof(struct plat_nand_data),  in plat_nand_probe()
60 		return -ENOMEM;  in plat_nand_probe()
62 	data->controller.ops = &plat_nand_ops;  in plat_nand_probe()
63 	nand_controller_init(&data->controller);  in plat_nand_probe()
64 	data->chip.controller = &data->controller;  in plat_nand_probe()
66 	data->io_base = devm_platform_ioremap_resource(pdev, 0);  in plat_nand_probe()
67 	if (IS_ERR(data->io_base))  in plat_nand_probe()
68 		return PTR_ERR(data->io_base);  in plat_nand_probe()
70 	nand_set_flash_node(&data->chip, pdev->dev.of_node);  in plat_nand_probe()
71 	mtd = nand_to_mtd(&data->chip);  in plat_nand_probe()
72 	mtd->dev.parent = &pdev->dev;  in plat_nand_probe()
74 	data->chip.legacy.IO_ADDR_R = data->io_base;  in plat_nand_probe()
75 	data->chip.legacy.IO_ADDR_W = data->io_base;  in plat_nand_probe()
76 	data->chip.legacy.cmd_ctrl = pdata->ctrl.cmd_ctrl;  in plat_nand_probe()
77 	data->chip.legacy.dev_ready = pdata->ctrl.dev_ready;  in plat_nand_probe()
78 	data->chip.legacy.select_chip = pdata->ctrl.select_chip;  in plat_nand_probe()
79 	data->chip.legacy.write_buf = pdata->ctrl.write_buf;  in plat_nand_probe()
80 	data->chip.legacy.read_buf = pdata->ctrl.read_buf;  in plat_nand_probe()
81 	data->chip.legacy.chip_delay = pdata->chip.chip_delay;  in plat_nand_probe()
82 	data->chip.options |= pdata->chip.options;  in plat_nand_probe()
83 	data->chip.bbt_options |= pdata->chip.bbt_options;  in plat_nand_probe()
88 	if (pdata->ctrl.probe) {  in plat_nand_probe()
89 		err = pdata->ctrl.probe(pdev);  in plat_nand_probe()
95 	 * This driver assumes that the default ECC engine should be TYPE_SOFT.  in plat_nand_probe()
96 	 * Set ->engine_type before registering the NAND devices in order to  in plat_nand_probe()
99 	data->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;  in plat_nand_probe()
102 	err = nand_scan(&data->chip, pdata->chip.nr_chips);  in plat_nand_probe()
106 	part_types = pdata->chip.part_probe_types;  in plat_nand_probe()
109 					pdata->chip.partitions,  in plat_nand_probe()
110 					pdata->chip.nr_partitions);  in plat_nand_probe()
115 	nand_cleanup(&data->chip);  in plat_nand_probe()
117 	if (pdata->ctrl.remove)  in plat_nand_probe()
118 		pdata->ctrl.remove(pdev);  in plat_nand_probe()
123  * Remove a NAND device.
128 	struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);  in plat_nand_remove()
129 	struct nand_chip *chip = &data->chip;  in plat_nand_remove()
135 	if (pdata->ctrl.remove)  in plat_nand_remove()
136 		pdata->ctrl.remove(pdev);  in plat_nand_remove()
158 MODULE_DESCRIPTION("Simple generic NAND driver");