1 // SPDX-License-Identifier: GPL-2.0-or-later
14 /* System Bus Controller registers */
43 	dev_dbg(priv->dev,  in uniphier_system_bus_add_bank()
47 	if (bank >= ARRAY_SIZE(priv->bank)) {  in uniphier_system_bus_add_bank()
48 		dev_err(priv->dev, "unsupported bank number %d\n", bank);  in uniphier_system_bus_add_bank()
49 		return -EINVAL;  in uniphier_system_bus_add_bank()
52 	if (priv->bank[bank].base || priv->bank[bank].end) {  in uniphier_system_bus_add_bank()
53 		dev_err(priv->dev,  in uniphier_system_bus_add_bank()
55 		return -EINVAL;  in uniphier_system_bus_add_bank()
59 		dev_err(priv->dev, "base address %llx is too high\n", paddr);  in uniphier_system_bus_add_bank()
60 		return -EINVAL;  in uniphier_system_bus_add_bank()
66 		dev_err(priv->dev,  in uniphier_system_bus_add_bank()
69 		return -EINVAL;  in uniphier_system_bus_add_bank()
71 	paddr -= addr;  in uniphier_system_bus_add_bank()
77 		dev_err(priv->dev, "end address %08llx is too high\n", end);  in uniphier_system_bus_add_bank()
78 		return -EINVAL;  in uniphier_system_bus_add_bank()
80 	mask = paddr ^ (end - 1);  in uniphier_system_bus_add_bank()
86 	priv->bank[bank].base = paddr;  in uniphier_system_bus_add_bank()
87 	priv->bank[bank].end = end;  in uniphier_system_bus_add_bank()
89 	dev_dbg(priv->dev, "range added: bank = %d, addr = %08x, end = %08x\n",  in uniphier_system_bus_add_bank()
90 		bank, priv->bank[bank].base, priv->bank[bank].end);  in uniphier_system_bus_add_bank()
100 	for (i = 0; i < ARRAY_SIZE(priv->bank); i++) {  in uniphier_system_bus_check_overlap()
101 		for (j = i + 1; j < ARRAY_SIZE(priv->bank); j++) {  in uniphier_system_bus_check_overlap()
102 			if (priv->bank[i].end > priv->bank[j].base &&  in uniphier_system_bus_check_overlap()
103 			    priv->bank[i].base < priv->bank[j].end) {  in uniphier_system_bus_check_overlap()
104 				dev_err(priv->dev,  in uniphier_system_bus_check_overlap()
107 				return -EINVAL;  in uniphier_system_bus_check_overlap()
118 	void __iomem *base_reg = priv->membase + UNIPHIER_SBC_BASE;  in uniphier_system_bus_check_boot_swap()
123 	dev_dbg(priv->dev, "Boot Swap: %s\n", is_swapped ? "on" : "off");  in uniphier_system_bus_check_boot_swap()
126 	 * If BOOT_SWAP was asserted on power-on-reset, the CS0 and CS1 are  in uniphier_system_bus_check_boot_swap()
130 		swap(priv->bank[0], priv->bank[1]);  in uniphier_system_bus_check_boot_swap()
136 	void __iomem *base_reg = priv->membase + UNIPHIER_SBC_BASE;  in uniphier_system_bus_set_reg()
140 	for (i = 0; i < ARRAY_SIZE(priv->bank); i++) {  in uniphier_system_bus_set_reg()
141 		base = priv->bank[i].base;  in uniphier_system_bus_set_reg()
142 		end = priv->bank[i].end;  in uniphier_system_bus_set_reg()
147 			 * to anywhere in the system bus space is routed to  in uniphier_system_bus_set_reg()
163 			mask = base ^ (end - 1);  in uniphier_system_bus_set_reg()
169 		dev_dbg(priv->dev, "SBC_BASE[%d] = 0x%08x\n", i, val);  in uniphier_system_bus_set_reg()
177 	struct device *dev = &pdev->dev;  in uniphier_system_bus_probe()
185 		return -ENOMEM;  in uniphier_system_bus_probe()
187 	priv->membase = devm_platform_ioremap_resource(pdev, 0);  in uniphier_system_bus_probe()
188 	if (IS_ERR(priv->membase))  in uniphier_system_bus_probe()
189 		return PTR_ERR(priv->membase);  in uniphier_system_bus_probe()
191 	priv->dev = dev;  in uniphier_system_bus_probe()
193 	ret = of_range_parser_init(&parser, dev->of_node);  in uniphier_system_bus_probe()
199 			return -EINVAL;  in uniphier_system_bus_probe()
218 	/* Now, the bus is configured.  Populate platform_devices below it */  in uniphier_system_bus_probe()
219 	return of_platform_default_populate(dev->of_node, NULL, dev);  in uniphier_system_bus_probe()
234 	{ .compatible = "socionext,uniphier-system-bus" },
242 		.name	= "uniphier-system-bus",
250 MODULE_DESCRIPTION("UniPhier System Bus driver");