1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Freescale UPM NAND driver.
5  * Copyright © 2007-2008  MontaVista Software, Inc.
23 	struct nand_controller base;  member
42 static int fun_chip_init(struct fsl_upm_nand *fun,  in fun_chip_init()
46 	struct mtd_info *mtd = nand_to_mtd(&fun->chip);  in fun_chip_init()
47 	int ret;  in fun_chip_init()
50 	fun->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;  in fun_chip_init()
51 	fun->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;  in fun_chip_init()
52 	fun->chip.controller = &fun->base;  in fun_chip_init()
53 	mtd->dev.parent = fun->dev;  in fun_chip_init()
57 		return -ENODEV;  in fun_chip_init()
59 	nand_set_flash_node(&fun->chip, flash_np);  in fun_chip_init()
60 	mtd->name = devm_kasprintf(fun->dev, GFP_KERNEL, "0x%llx.%pOFn",  in fun_chip_init()
61 				   (u64)io_res->start,  in fun_chip_init()
63 	if (!mtd->name) {  in fun_chip_init()
64 		ret = -ENOMEM;  in fun_chip_init()
68 	ret = nand_scan(&fun->chip, fun->mchip_count);  in fun_chip_init()
78 static int func_exec_instr(struct nand_chip *chip,  in func_exec_instr()
82 	u32 mar, reg_offs = fun->mchip_offsets[fun->mchip_number];  in func_exec_instr()
83 	unsigned int i;  in func_exec_instr()
87 	switch (instr->type) {  in func_exec_instr()
89 		fsl_upm_start_pattern(&fun->upm, fun->upm_cmd_offset);  in func_exec_instr()
90 		mar = (instr->ctx.cmd.opcode << (32 - fun->upm.width)) |  in func_exec_instr()
92 		fsl_upm_run_pattern(&fun->upm, fun->io_base + reg_offs, mar);  in func_exec_instr()
93 		fsl_upm_end_pattern(&fun->upm);  in func_exec_instr()
97 		fsl_upm_start_pattern(&fun->upm, fun->upm_addr_offset);  in func_exec_instr()
98 		for (i = 0; i < instr->ctx.addr.naddrs; i++) {  in func_exec_instr()
99 			mar = (instr->ctx.addr.addrs[i] << (32 - fun->upm.width)) |  in func_exec_instr()
101 			fsl_upm_run_pattern(&fun->upm, fun->io_base + reg_offs, mar);  in func_exec_instr()
103 		fsl_upm_end_pattern(&fun->upm);  in func_exec_instr()
107 		in = instr->ctx.data.buf.in;  in func_exec_instr()
108 		for (i = 0; i < instr->ctx.data.len; i++)  in func_exec_instr()
109 			in[i] = in_8(fun->io_base + reg_offs);  in func_exec_instr()
113 		out = instr->ctx.data.buf.out;  in func_exec_instr()
114 		for (i = 0; i < instr->ctx.data.len; i++)  in func_exec_instr()
115 			out_8(fun->io_base + reg_offs, out[i]);  in func_exec_instr()
119 		if (!fun->rnb_gpio[fun->mchip_number])  in func_exec_instr()
120 			return nand_soft_waitrdy(chip, instr->ctx.waitrdy.timeout_ms);  in func_exec_instr()
122 		return nand_gpio_waitrdy(chip, fun->rnb_gpio[fun->mchip_number],  in func_exec_instr()
123 					 instr->ctx.waitrdy.timeout_ms);  in func_exec_instr()
126 		return -EINVAL;  in func_exec_instr()
132 static int fun_exec_op(struct nand_chip *chip, const struct nand_operation *op,  in fun_exec_op()
136 	unsigned int i;  in fun_exec_op()
137 	int ret;  in fun_exec_op()
139 	if (op->cs >= NAND_MAX_CHIPS)  in fun_exec_op()
140 		return -EINVAL;  in fun_exec_op()
145 	fun->mchip_number = op->cs;  in fun_exec_op()
147 	for (i = 0; i < op->ninstrs; i++) {  in fun_exec_op()
148 		ret = func_exec_instr(chip, &op->instrs[i]);  in fun_exec_op()
152 		if (op->instrs[i].delay_ns)  in fun_exec_op()
153 			ndelay(op->instrs[i].delay_ns);  in fun_exec_op()
163 static int fun_probe(struct platform_device *ofdev)  in fun_probe()
168 	int ret;  in fun_probe()
169 	int size;  in fun_probe()
170 	int i;  in fun_probe()
172 	fun = devm_kzalloc(&ofdev->dev, sizeof(*fun), GFP_KERNEL);  in fun_probe()
174 		return -ENOMEM;  in fun_probe()
176 	fun->io_base = devm_platform_get_and_ioremap_resource(ofdev, 0, &io_res);  in fun_probe()
177 	if (IS_ERR(fun->io_base))  in fun_probe()
178 		return PTR_ERR(fun->io_base);  in fun_probe()
180 	ret = fsl_upm_find(io_res->start, &fun->upm);  in fun_probe()
182 		dev_err(&ofdev->dev, "can't find UPM\n");  in fun_probe()
186 	prop = of_get_property(ofdev->dev.of_node, "fsl,upm-addr-offset",  in fun_probe()
189 		dev_err(&ofdev->dev, "can't get UPM address offset\n");  in fun_probe()
190 		return -EINVAL;  in fun_probe()
192 	fun->upm_addr_offset = *prop;  in fun_probe()
194 	prop = of_get_property(ofdev->dev.of_node, "fsl,upm-cmd-offset", &size);  in fun_probe()
196 		dev_err(&ofdev->dev, "can't get UPM command offset\n");  in fun_probe()
197 		return -EINVAL;  in fun_probe()
199 	fun->upm_cmd_offset = *prop;  in fun_probe()
201 	prop = of_get_property(ofdev->dev.of_node,  in fun_probe()
202 			       "fsl,upm-addr-line-cs-offsets", &size);  in fun_probe()
204 		fun->mchip_count = size / sizeof(uint32_t);  in fun_probe()
205 		if (fun->mchip_count >= NAND_MAX_CHIPS) {  in fun_probe()
206 			dev_err(&ofdev->dev, "too much multiple chips\n");  in fun_probe()
207 			return -EINVAL;  in fun_probe()
209 		for (i = 0; i < fun->mchip_count; i++)  in fun_probe()
210 			fun->mchip_offsets[i] = be32_to_cpu(prop[i]);  in fun_probe()
212 		fun->mchip_count = 1;  in fun_probe()
215 	for (i = 0; i < fun->mchip_count; i++) {  in fun_probe()
216 		fun->rnb_gpio[i] = devm_gpiod_get_index_optional(&ofdev->dev,  in fun_probe()
219 		if (IS_ERR(fun->rnb_gpio[i])) {  in fun_probe()
220 			dev_err(&ofdev->dev, "RNB gpio #%d is invalid\n", i);  in fun_probe()
221 			return PTR_ERR(fun->rnb_gpio[i]);  in fun_probe()
225 	nand_controller_init(&fun->base);  in fun_probe()
226 	fun->base.ops = &fun_ops;  in fun_probe()
227 	fun->dev = &ofdev->dev;  in fun_probe()
229 	ret = fun_chip_init(fun, ofdev->dev.of_node, io_res);  in fun_probe()
233 	dev_set_drvdata(&ofdev->dev, fun);  in fun_probe()
240 	struct fsl_upm_nand *fun = dev_get_drvdata(&ofdev->dev);  in fun_remove()
241 	struct nand_chip *chip = &fun->chip;  in fun_remove()
243 	int ret;  in fun_remove()
251 	{ .compatible = "fsl,upm-nand" },
258 		.name = "fsl,upm-nand",
269 MODULE_DESCRIPTION("Driver for NAND chips working through Freescale "
270 		   "LocalBus User-Programmable Machine");