3  * JZ4780 NAND/external memory controller (NEMC)
21 #include <linux/jz4780-nemc.h>
63  * @dev: device to count banks for, must be a child of the NEMC.
65  * Return: The number of unique NEMC banks referred to by the specified NEMC
90  * @dev: child device of the NEMC.
97 	struct jz4780_nemc *nemc = dev_get_drvdata(dev->parent);  in jz4780_nemc_set_type()  local
100 	nfcsr = readl(nemc->base + NEMC_NFCSR);  in jz4780_nemc_set_type()
113 	writel(nfcsr, nemc->base + NEMC_NFCSR);  in jz4780_nemc_set_type()
119  * @dev: child device of the NEMC.
128 	struct jz4780_nemc *nemc = dev_get_drvdata(dev->parent);  in jz4780_nemc_assert()  local
131 	nfcsr = readl(nemc->base + NEMC_NFCSR);  in jz4780_nemc_assert()
138 	writel(nfcsr, nemc->base + NEMC_NFCSR);  in jz4780_nemc_assert()
142 static uint32_t jz4780_nemc_clk_period(struct jz4780_nemc *nemc)  in jz4780_nemc_clk_period()  argument
146 	rate = clk_get_rate(nemc->clk);  in jz4780_nemc_clk_period()
154 static uint32_t jz4780_nemc_ns_to_cycles(struct jz4780_nemc *nemc, uint32_t ns)  in jz4780_nemc_ns_to_cycles()  argument
156 	return ((ns * 1000) + nemc->clk_period - 1) / nemc->clk_period;  in jz4780_nemc_ns_to_cycles()
159 static bool jz4780_nemc_configure_bank(struct jz4780_nemc *nemc,  in jz4780_nemc_configure_bank()  argument
188 	smcr = readl(nemc->base + NEMC_SMCRn(bank));  in jz4780_nemc_configure_bank()
191 	if (!of_property_read_u32(node, "ingenic,nemc-bus-width", &val)) {  in jz4780_nemc_configure_bank()
202 			dev_err(nemc->dev, "unsupported bus width: %u\n", val);  in jz4780_nemc_configure_bank()
207 	if (of_property_read_u32(node, "ingenic,nemc-tAS", &val) == 0) {  in jz4780_nemc_configure_bank()
209 		cycles = jz4780_nemc_ns_to_cycles(nemc, val);  in jz4780_nemc_configure_bank()
210 		if (cycles > nemc->soc_info->tas_tah_cycles_max) {  in jz4780_nemc_configure_bank()
211 			dev_err(nemc->dev, "tAS %u is too high (%u cycles)\n",  in jz4780_nemc_configure_bank()
219 	if (of_property_read_u32(node, "ingenic,nemc-tAH", &val) == 0) {  in jz4780_nemc_configure_bank()
221 		cycles = jz4780_nemc_ns_to_cycles(nemc, val);  in jz4780_nemc_configure_bank()
222 		if (cycles > nemc->soc_info->tas_tah_cycles_max) {  in jz4780_nemc_configure_bank()
223 			dev_err(nemc->dev, "tAH %u is too high (%u cycles)\n",  in jz4780_nemc_configure_bank()
231 	if (of_property_read_u32(node, "ingenic,nemc-tBP", &val) == 0) {  in jz4780_nemc_configure_bank()
233 		cycles = jz4780_nemc_ns_to_cycles(nemc, val);  in jz4780_nemc_configure_bank()
235 			dev_err(nemc->dev, "tBP %u is too high (%u cycles)\n",  in jz4780_nemc_configure_bank()
243 	if (of_property_read_u32(node, "ingenic,nemc-tAW", &val) == 0) {  in jz4780_nemc_configure_bank()
245 		cycles = jz4780_nemc_ns_to_cycles(nemc, val);  in jz4780_nemc_configure_bank()
247 			dev_err(nemc->dev, "tAW %u is too high (%u cycles)\n",  in jz4780_nemc_configure_bank()
255 	if (of_property_read_u32(node, "ingenic,nemc-tSTRV", &val) == 0) {  in jz4780_nemc_configure_bank()
257 		cycles = jz4780_nemc_ns_to_cycles(nemc, val);  in jz4780_nemc_configure_bank()
259 			dev_err(nemc->dev, "tSTRV %u is too high (%u cycles)\n",  in jz4780_nemc_configure_bank()
267 	writel(smcr, nemc->base + NEMC_SMCRn(bank));  in jz4780_nemc_configure_bank()
274 	struct jz4780_nemc *nemc;  in jz4780_nemc_probe()  local
282 	nemc = devm_kzalloc(dev, sizeof(*nemc), GFP_KERNEL);  in jz4780_nemc_probe()
283 	if (!nemc)  in jz4780_nemc_probe()
286 	nemc->soc_info = device_get_match_data(dev);  in jz4780_nemc_probe()
287 	if (!nemc->soc_info)  in jz4780_nemc_probe()
290 	spin_lock_init(&nemc->lock);  in jz4780_nemc_probe()
291 	nemc->dev = dev;  in jz4780_nemc_probe()
300 	 * NEMC registers, we only request the registers we will use for now;  in jz4780_nemc_probe()
308 	nemc->base = devm_ioremap(dev, res->start, NEMC_REG_LEN);  in jz4780_nemc_probe()
309 	if (!nemc->base) {  in jz4780_nemc_probe()
314 	writel(0, nemc->base + NEMC_NFCSR);  in jz4780_nemc_probe()
316 	nemc->clk = devm_clk_get(dev, NULL);  in jz4780_nemc_probe()
317 	if (IS_ERR(nemc->clk)) {  in jz4780_nemc_probe()
319 		return PTR_ERR(nemc->clk);  in jz4780_nemc_probe()
322 	ret = clk_prepare_enable(nemc->clk);  in jz4780_nemc_probe()
328 	nemc->clk_period = jz4780_nemc_clk_period(nemc);  in jz4780_nemc_probe()
329 	if (!nemc->clk_period) {  in jz4780_nemc_probe()
331 		clk_disable_unprepare(nemc->clk);  in jz4780_nemc_probe()
341 	for_each_child_of_node(nemc->dev->of_node, child) {  in jz4780_nemc_probe()
347 				dev_err(nemc->dev,  in jz4780_nemc_probe()
360 			dev_err(nemc->dev, "%pOF has no addresses\n",  in jz4780_nemc_probe()
363 		} else if (nemc->banks_present & referenced) {  in jz4780_nemc_probe()
364 			dev_err(nemc->dev, "%pOF conflicts with another node\n",  in jz4780_nemc_probe()
371 			if (!jz4780_nemc_configure_bank(nemc, bank, child)) {  in jz4780_nemc_probe()
378 			if (of_platform_device_create(child, NULL, nemc->dev))  in jz4780_nemc_probe()
379 				nemc->banks_present |= referenced;  in jz4780_nemc_probe()
383 	platform_set_drvdata(pdev, nemc);  in jz4780_nemc_probe()
384 	dev_info(dev, "JZ4780 NEMC initialised\n");  in jz4780_nemc_probe()
390 	struct jz4780_nemc *nemc = platform_get_drvdata(pdev);  in jz4780_nemc_remove()  local
392 	clk_disable_unprepare(nemc->clk);  in jz4780_nemc_remove()
405 	{ .compatible = "ingenic,jz4740-nemc", .data = &jz4740_soc_info, },
406 	{ .compatible = "ingenic,jz4780-nemc", .data = &jz4780_soc_info, },
414 		.name	= "jz4780-nemc",