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
32 static const char driver_name[] = "pasemi-nand";
37 		memcpy_fromio(buf, chip->legacy.IO_ADDR_R, 0x800);  in pasemi_read_buf()
39 		len -= 0x800;  in pasemi_read_buf()
41 	memcpy_fromio(buf, chip->legacy.IO_ADDR_R, len);  in pasemi_read_buf()
48 		memcpy_toio(chip->legacy.IO_ADDR_R, buf, 0x800);  in pasemi_write_buf()
50 		len -= 0x800;  in pasemi_write_buf()
52 	memcpy_toio(chip->legacy.IO_ADDR_R, buf, len);  in pasemi_write_buf()
62 		out_8(chip->legacy.IO_ADDR_W + (1 << CLE_PIN_CTL), cmd);  in pasemi_hwcontrol()
64 		out_8(chip->legacy.IO_ADDR_W + (1 << ALE_PIN_CTL), cmd);  in pasemi_hwcontrol()
78 	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;  in pasemi_attach_chip()
80 	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)  in pasemi_attach_chip()
81 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;  in pasemi_attach_chip()
92 	struct device *dev = &ofdev->dev;  in pasemi_nand_probe()
94 	struct device_node *np = dev->of_node;  in pasemi_nand_probe()
102 		return -EINVAL;  in pasemi_nand_probe()
106 		return -ENODEV;  in pasemi_nand_probe()
113 		err = -ENOMEM;  in pasemi_nand_probe()
119 	chip->controller = &controller;  in pasemi_nand_probe()
124 	pasemi_nand_mtd->dev.parent = dev;  in pasemi_nand_probe()
126 	chip->legacy.IO_ADDR_R = of_iomap(np, 0);  in pasemi_nand_probe()
127 	chip->legacy.IO_ADDR_W = chip->legacy.IO_ADDR_R;  in pasemi_nand_probe()
129 	if (!chip->legacy.IO_ADDR_R) {  in pasemi_nand_probe()
130 		err = -EIO;  in pasemi_nand_probe()
136 		err = -ENODEV;  in pasemi_nand_probe()
144 		err = -EBUSY;  in pasemi_nand_probe()
148 	chip->legacy.cmd_ctrl = pasemi_hwcontrol;  in pasemi_nand_probe()
149 	chip->legacy.dev_ready = pasemi_device_ready;  in pasemi_nand_probe()
150 	chip->legacy.read_buf = pasemi_read_buf;  in pasemi_nand_probe()
151 	chip->legacy.write_buf = pasemi_write_buf;  in pasemi_nand_probe()
152 	chip->legacy.chip_delay = 0;  in pasemi_nand_probe()
155 	chip->bbt_options = NAND_BBT_USE_FLASH;  in pasemi_nand_probe()
164 		err = -ENODEV;  in pasemi_nand_probe()
168 	dev_info(dev, "PA Semi NAND flash at %pR, control at I/O %x\n", &res,  in pasemi_nand_probe()
178 	iounmap(chip->legacy.IO_ADDR_R);  in pasemi_nand_probe()
202 	iounmap(chip->legacy.IO_ADDR_R);  in pasemi_nand_remove()
215 		.compatible   = "pasemi,localbus-nand",
236 MODULE_DESCRIPTION("NAND flash interface driver for PA Semi PWRficient");