1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2006-2007 PA Semi, Inc
8  * Driver for the PWRficient onchip NAND flash interface
33 static const char driver_name[] = "pasemi-nand";
38 		memcpy_fromio(buf, chip->legacy.IO_ADDR_R, 0x800);  in pasemi_read_buf()
40 		len -= 0x800;  in pasemi_read_buf()
42 	memcpy_fromio(buf, chip->legacy.IO_ADDR_R, len);  in pasemi_read_buf()
49 		memcpy_toio(chip->legacy.IO_ADDR_R, buf, 0x800);  in pasemi_write_buf()
51 		len -= 0x800;  in pasemi_write_buf()
53 	memcpy_toio(chip->legacy.IO_ADDR_R, buf, len);  in pasemi_write_buf()
63 		out_8(chip->legacy.IO_ADDR_W + (1 << CLE_PIN_CTL), cmd);  in pasemi_hwcontrol()
65 		out_8(chip->legacy.IO_ADDR_W + (1 << ALE_PIN_CTL), cmd);  in pasemi_hwcontrol()
79 	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;  in pasemi_attach_chip()
81 	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)  in pasemi_attach_chip()
82 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;  in pasemi_attach_chip()
93 	struct device *dev = &ofdev->dev;  in pasemi_nand_probe()
95 	struct device_node *np = dev->of_node;  in pasemi_nand_probe()
103 		return -EINVAL;  in pasemi_nand_probe()
107 		return -ENODEV;  in pasemi_nand_probe()
114 		err = -ENOMEM;  in pasemi_nand_probe()
120 	chip->controller = &controller;  in pasemi_nand_probe()
125 	pasemi_nand_mtd->dev.parent = dev;  in pasemi_nand_probe()
127 	chip->legacy.IO_ADDR_R = of_iomap(np, 0);  in pasemi_nand_probe()
128 	chip->legacy.IO_ADDR_W = chip->legacy.IO_ADDR_R;  in pasemi_nand_probe()
130 	if (!chip->legacy.IO_ADDR_R) {  in pasemi_nand_probe()
131 		err = -EIO;  in pasemi_nand_probe()
137 		err = -ENODEV;  in pasemi_nand_probe()
145 		err = -EBUSY;  in pasemi_nand_probe()
149 	chip->legacy.cmd_ctrl = pasemi_hwcontrol;  in pasemi_nand_probe()
150 	chip->legacy.dev_ready = pasemi_device_ready;  in pasemi_nand_probe()
151 	chip->legacy.read_buf = pasemi_read_buf;  in pasemi_nand_probe()
152 	chip->legacy.write_buf = pasemi_write_buf;  in pasemi_nand_probe()
153 	chip->legacy.chip_delay = 0;  in pasemi_nand_probe()
156 	chip->bbt_options = NAND_BBT_USE_FLASH;  in pasemi_nand_probe()
165 		err = -ENODEV;  in pasemi_nand_probe()
169 	dev_info(dev, "PA Semi NAND flash at %pR, control at I/O %x\n", &res,  in pasemi_nand_probe()
179 	iounmap(chip->legacy.IO_ADDR_R);  in pasemi_nand_probe()
203 	iounmap(chip->legacy.IO_ADDR_R);  in pasemi_nand_remove()
216 		.compatible   = "pasemi,localbus-nand",
237 MODULE_DESCRIPTION("NAND flash interface driver for PA Semi PWRficient");