2  * Allwinner SoCs SRAM Controller Driver
6  * Author: Maxime Ripard <maxime.ripard@free-electrons.com>
62 	.data	= SUNXI_SRAM_DATA("A3-A4", 0x4, 0x4, 2,
76 				  SUNXI_SRAM_MAP(1, 1, "usb-otg")),
87 		.compatible	= "allwinner,sun4i-a10-sram-a3-a4",
91 		.compatible	= "allwinner,sun4i-a10-sram-c1",
95 		.compatible	= "allwinner,sun4i-a10-sram-d",
99 		.compatible	= "allwinner,sun50i-a64-sram-c",
105 static struct device *sram_dev;
119 	seq_puts(s, "Allwinner sunXi SRAM\n");  in sunxi_sram_show()
120 	seq_puts(s, "--------------------\n\n");  in sunxi_sram_show()
122 	for_each_child_of_node(sram_dev->of_node, sram_node) {  in sunxi_sram_show()
125 		seq_printf(s, "sram@%08x\n",  in sunxi_sram_show()
132 			sram_data = match->data;  in sunxi_sram_show()
139 				   sram_data->name);  in sunxi_sram_show()
141 			val = readl(base + sram_data->reg);  in sunxi_sram_show()
142 			val >>= sram_data->offset;  in sunxi_sram_show()
143 			val &= GENMASK(sram_data->width - 1, 0);  in sunxi_sram_show()
145 			for (func = sram_data->func; func->func; func++) {  in sunxi_sram_show()
146 				seq_printf(s, "\t\t%s%c\n", func->func,  in sunxi_sram_show()
147 					   func->reg_val == val ?  in sunxi_sram_show()
160 	return single_open(file, sunxi_sram_show, inode->i_private);  in sunxi_sram_open()
185 	ret = of_parse_phandle_with_fixed_args(node, "allwinner,sram", 1, 0,  in sunxi_sram_of_parse()
191 		ret = -EBUSY;  in sunxi_sram_of_parse()
199 		ret = -EINVAL;  in sunxi_sram_of_parse()
203 	data = match->data;  in sunxi_sram_of_parse()
205 		ret = -EINVAL;  in sunxi_sram_of_parse()
209 	for (func = data->func; func->func; func++) {  in sunxi_sram_of_parse()
210 		if (val == func->val) {  in sunxi_sram_of_parse()
212 				*reg_value = func->reg_val;  in sunxi_sram_of_parse()
218 	if (!func->func) {  in sunxi_sram_of_parse()
219 		ret = -EINVAL;  in sunxi_sram_of_parse()
224 	return match->data;  in sunxi_sram_of_parse()
231 int sunxi_sram_claim(struct device *dev)  in sunxi_sram_claim()
235 	unsigned int device;  in sunxi_sram_claim()  local
242 		return -EPROBE_DEFER;  in sunxi_sram_claim()
244 	if (!dev || !dev->of_node)  in sunxi_sram_claim()
245 		return -EINVAL;  in sunxi_sram_claim()
247 	sram_data = sunxi_sram_of_parse(dev->of_node, &device);  in sunxi_sram_claim()
255 	if (sram_desc->claimed) {  in sunxi_sram_claim()
257 		return -EBUSY;  in sunxi_sram_claim()
260 	mask = GENMASK(sram_data->offset + sram_data->width - 1,  in sunxi_sram_claim()
261 		       sram_data->offset);  in sunxi_sram_claim()
262 	val = readl(base + sram_data->reg);  in sunxi_sram_claim()
264 	writel(val | ((device << sram_data->offset) & mask),  in sunxi_sram_claim()
265 	       base + sram_data->reg);  in sunxi_sram_claim()
273 int sunxi_sram_release(struct device *dev)  in sunxi_sram_release()
278 	if (!dev || !dev->of_node)  in sunxi_sram_release()
279 		return -EINVAL;  in sunxi_sram_release()
281 	sram_data = sunxi_sram_of_parse(dev->of_node, NULL);  in sunxi_sram_release()
283 		return -EINVAL;  in sunxi_sram_release()
288 	sram_desc->claimed = false;  in sunxi_sram_release()
308 static bool sunxi_sram_regmap_accessible_reg(struct device *dev,  in sunxi_sram_regmap_accessible_reg()
334 	sram_dev = &pdev->dev;  in sunxi_sram_probe()
336 	variant = of_device_get_match_data(&pdev->dev);  in sunxi_sram_probe()
338 		return -EINVAL;  in sunxi_sram_probe()
341 	base = devm_ioremap_resource(&pdev->dev, res);  in sunxi_sram_probe()
345 	of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);  in sunxi_sram_probe()
347 	d = debugfs_create_file("sram", S_IRUGO, NULL, NULL,  in sunxi_sram_probe()
350 		return -ENOMEM;  in sunxi_sram_probe()
352 	if (variant->has_emac_clock) {  in sunxi_sram_probe()
353 		emac_clock = devm_regmap_init_mmio(&pdev->dev, base,  in sunxi_sram_probe()
365 		.compatible = "allwinner,sun4i-a10-sram-controller",
369 		.compatible = "allwinner,sun4i-a10-system-control",
373 		.compatible = "allwinner,sun5i-a13-system-control",
377 		.compatible = "allwinner,sun8i-a23-system-control",
381 		.compatible = "allwinner,sun8i-h3-system-control",
385 		.compatible = "allwinner,sun50i-a64-sram-controller",
389 		.compatible = "allwinner,sun50i-a64-system-control",
398 		.name		= "sunxi-sram",
405 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
406 MODULE_DESCRIPTION("Allwinner sunXi SRAM Controller Driver");