1 // SPDX-License-Identifier: GPL-2.0
3  * Technologic Systems TS72xx NAND controller driver
33 	struct nand_controller	controller;  member
47 	switch (chip->ecc.engine_type) {  in ts72xx_nand_attach_chip()
49 		return -EINVAL;  in ts72xx_nand_attach_chip()
51 		if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)  in ts72xx_nand_attach_chip()
52 			chip->ecc.algo = NAND_ECC_ALGO_HAMMING;  in ts72xx_nand_attach_chip()
53 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;  in ts72xx_nand_attach_chip()
62 	struct ts72xx_nand_data *data = chip_to_ts72xx(chip);  in ts72xx_nand_ctrl()  local
63 	unsigned char bits = ioread8(data->ctrl) & ~GENMASK(2, 0);  in ts72xx_nand_ctrl()
65 	iowrite8(bits | value, data->ctrl);  in ts72xx_nand_ctrl()
71 	struct ts72xx_nand_data *data = chip_to_ts72xx(chip);  in ts72xx_nand_exec_instr()  local
76 	switch (instr->type) {  in ts72xx_nand_exec_instr()
79 		iowrite8(instr->ctx.cmd.opcode, data->base);  in ts72xx_nand_exec_instr()
85 		iowrite8_rep(data->base, instr->ctx.addr.addrs, instr->ctx.addr.naddrs);  in ts72xx_nand_exec_instr()
90 		ioread8_rep(data->base, instr->ctx.data.buf.in, instr->ctx.data.len);  in ts72xx_nand_exec_instr()
94 		iowrite8_rep(data->base, instr->ctx.data.buf.in, instr->ctx.data.len);  in ts72xx_nand_exec_instr()
98 		timeout_us = instr->ctx.waitrdy.timeout_ms * 1000;  in ts72xx_nand_exec_instr()
99 		ret = readb_poll_timeout(data->busy, status, status & BIT(5), 0, timeout_us);  in ts72xx_nand_exec_instr()
106 	if (instr->delay_ns)  in ts72xx_nand_exec_instr()
107 		ndelay(instr->delay_ns);  in ts72xx_nand_exec_instr()
121 	for (i = 0; i < op->ninstrs; i++) {  in ts72xx_nand_exec_op()
122 		ret = ts72xx_nand_exec_instr(chip, &op->instrs[i]);  in ts72xx_nand_exec_op()
137 	struct ts72xx_nand_data *data;  in ts72xx_nand_probe()  local
142 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in ts72xx_nand_probe()
143 	if (!data)  in ts72xx_nand_probe()
144 		return -ENOMEM;  in ts72xx_nand_probe()
146 	nand_controller_init(&data->controller);  in ts72xx_nand_probe()
147 	data->controller.ops = &ts72xx_nand_ops;  in ts72xx_nand_probe()
148 	data->chip.controller = &data->controller;  in ts72xx_nand_probe()
150 	data->base = devm_platform_ioremap_resource(pdev, 0);  in ts72xx_nand_probe()
151 	if (IS_ERR(data->base))  in ts72xx_nand_probe()
152 		return PTR_ERR(data->base);  in ts72xx_nand_probe()
153 	data->ctrl = data->base + TS72XX_NAND_CONTROL_ADDR_LINE;  in ts72xx_nand_probe()
154 	data->busy = data->base + TS72XX_NAND_BUSY_ADDR_LINE;  in ts72xx_nand_probe()
156 	child = fwnode_get_next_child_node(dev_fwnode(&pdev->dev), NULL);  in ts72xx_nand_probe()
158 		return dev_err_probe(&pdev->dev, -ENXIO,  in ts72xx_nand_probe()
159 				"ts72xx controller node should have exactly one child\n");  in ts72xx_nand_probe()
161 	nand_set_flash_node(&data->chip, to_of_node(child));  in ts72xx_nand_probe()
162 	mtd = nand_to_mtd(&data->chip);  in ts72xx_nand_probe()
163 	mtd->dev.parent = &pdev->dev;  in ts72xx_nand_probe()
164 	platform_set_drvdata(pdev, data);  in ts72xx_nand_probe()
168 	 * Set ->engine_type before registering the NAND devices in order to  in ts72xx_nand_probe()
171 	data->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;  in ts72xx_nand_probe()
174 	err = nand_scan(&data->chip, 1);  in ts72xx_nand_probe()
185 	nand_cleanup(&data->chip);  in ts72xx_nand_probe()
193 	struct ts72xx_nand_data *data = platform_get_drvdata(pdev);  in ts72xx_nand_remove()  local
194 	struct fwnode_handle *fwnode = dev_fwnode(&pdev->dev);  in ts72xx_nand_remove()
195 	struct nand_chip *chip = &data->chip;  in ts72xx_nand_remove()
205 	{ .compatible = "technologic,ts7200-nand" },
212 		.name = "ts72xx-nand",
221 MODULE_DESCRIPTION("Technologic Systems TS72xx NAND controller driver");