1 // SPDX-License-Identifier: GPL-2.0-only
33  * socrates_nand_write_buf -  write buffer to chip
34  * @this:	NAND chip object
36  * @len:	number of bytes to write
42 	struct socrates_nand_host *host = nand_get_controller_data(this);  in socrates_nand_write_buf()  local
45 		out_be32(host->io_base, FPGA_NAND_ENABLE |  in socrates_nand_write_buf()
52  * socrates_nand_read_buf -  read chip data into buffer
53  * @this:	NAND chip object
54  * @buf:	buffer to store date
55  * @len:	number of bytes to read
61 	struct socrates_nand_host *host = nand_get_controller_data(this);  in socrates_nand_read_buf()  local
66 	out_be32(host->io_base, val);  in socrates_nand_read_buf()
68 		buf[i] = (in_be32(host->io_base) >>  in socrates_nand_read_buf()
74  * socrates_nand_read_byte -  read one byte from the chip
85  * Hardware specific access to control-lines
90 	struct socrates_nand_host *host = nand_get_controller_data(nand_chip);  in socrates_nand_cmd_ctrl()  local
106 	out_be32(host->io_base, val);  in socrates_nand_cmd_ctrl()
114 	struct socrates_nand_host *host = nand_get_controller_data(nand_chip);  in socrates_nand_device_ready()  local
116 	if (in_be32(host->io_base) & FPGA_NAND_BUSY)  in socrates_nand_device_ready()
121 static int socrates_attach_chip(struct nand_chip *chip)  in socrates_attach_chip()  argument
123 	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_SOFT &&  in socrates_attach_chip()
124 	    chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)  in socrates_attach_chip()
125 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;  in socrates_attach_chip()
139 	struct socrates_nand_host *host;  in socrates_nand_probe()  local
145 	host = devm_kzalloc(&ofdev->dev, sizeof(*host), GFP_KERNEL);  in socrates_nand_probe()
146 	if (!host)  in socrates_nand_probe()
147 		return -ENOMEM;  in socrates_nand_probe()
149 	host->io_base = of_iomap(ofdev->dev.of_node, 0);  in socrates_nand_probe()
150 	if (host->io_base == NULL) {  in socrates_nand_probe()
151 		dev_err(&ofdev->dev, "ioremap failed\n");  in socrates_nand_probe()
152 		return -EIO;  in socrates_nand_probe()
155 	nand_chip = &host->nand_chip;  in socrates_nand_probe()
157 	host->dev = &ofdev->dev;  in socrates_nand_probe()
159 	nand_controller_init(&host->controller);  in socrates_nand_probe()
160 	host->controller.ops = &socrates_ops;  in socrates_nand_probe()
161 	nand_chip->controller = &host->controller;  in socrates_nand_probe()
164 	nand_set_controller_data(nand_chip, host);  in socrates_nand_probe()
165 	nand_set_flash_node(nand_chip, ofdev->dev.of_node);  in socrates_nand_probe()
166 	mtd->name = "socrates_nand";  in socrates_nand_probe()
167 	mtd->dev.parent = &ofdev->dev;  in socrates_nand_probe()
169 	nand_chip->legacy.cmd_ctrl = socrates_nand_cmd_ctrl;  in socrates_nand_probe()
170 	nand_chip->legacy.read_byte = socrates_nand_read_byte;  in socrates_nand_probe()
171 	nand_chip->legacy.write_buf = socrates_nand_write_buf;  in socrates_nand_probe()
172 	nand_chip->legacy.read_buf = socrates_nand_read_buf;  in socrates_nand_probe()
173 	nand_chip->legacy.dev_ready = socrates_nand_device_ready;  in socrates_nand_probe()
176 	nand_chip->legacy.chip_delay = 20;	/* 20us command delay time */  in socrates_nand_probe()
180 	 * Set ->engine_type before registering the NAND devices in order to  in socrates_nand_probe()
183 	nand_chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;  in socrates_nand_probe()
185 	dev_set_drvdata(&ofdev->dev, host);  in socrates_nand_probe()
198 	iounmap(host->io_base);  in socrates_nand_probe()
207 	struct socrates_nand_host *host = dev_get_drvdata(&ofdev->dev);  in socrates_nand_remove()  local
208 	struct nand_chip *chip = &host->nand_chip;  in socrates_nand_remove()  local
211 	ret = mtd_device_unregister(nand_to_mtd(chip));  in socrates_nand_remove()
213 	nand_cleanup(chip);  in socrates_nand_remove()
215 	iounmap(host->io_base);  in socrates_nand_remove()
221 		.compatible   = "abb,socrates-nand",