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()
175 	ret = of_parse_phandle_with_fixed_args(node, "allwinner,sram", 1, 0,  in sunxi_sram_of_parse()
181 		ret = -EBUSY;  in sunxi_sram_of_parse()
189 		ret = -EINVAL;  in sunxi_sram_of_parse()
193 	data = match->data;  in sunxi_sram_of_parse()
195 		ret = -EINVAL;  in sunxi_sram_of_parse()
199 	for (func = data->func; func->func; func++) {  in sunxi_sram_of_parse()
200 		if (val == func->val) {  in sunxi_sram_of_parse()
202 				*reg_value = func->reg_val;  in sunxi_sram_of_parse()
208 	if (!func->func) {  in sunxi_sram_of_parse()
209 		ret = -EINVAL;  in sunxi_sram_of_parse()
214 	return match->data;  in sunxi_sram_of_parse()
221 int sunxi_sram_claim(struct device *dev)  in sunxi_sram_claim()
225 	unsigned int device;  in sunxi_sram_claim()  local
232 		return -EPROBE_DEFER;  in sunxi_sram_claim()
234 	if (!dev || !dev->of_node)  in sunxi_sram_claim()
235 		return -EINVAL;  in sunxi_sram_claim()
237 	sram_data = sunxi_sram_of_parse(dev->of_node, &device);  in sunxi_sram_claim()
245 	if (sram_desc->claimed) {  in sunxi_sram_claim()
247 		return -EBUSY;  in sunxi_sram_claim()
250 	mask = GENMASK(sram_data->offset + sram_data->width - 1,  in sunxi_sram_claim()
251 		       sram_data->offset);  in sunxi_sram_claim()
252 	val = readl(base + sram_data->reg);  in sunxi_sram_claim()
254 	writel(val | ((device << sram_data->offset) & mask),  in sunxi_sram_claim()
255 	       base + sram_data->reg);  in sunxi_sram_claim()
257 	sram_desc->claimed = true;  in sunxi_sram_claim()
264 void sunxi_sram_release(struct device *dev)  in sunxi_sram_release()
269 	if (!dev || !dev->of_node)  in sunxi_sram_release()
272 	sram_data = sunxi_sram_of_parse(dev->of_node, NULL);  in sunxi_sram_release()
279 	sram_desc->claimed = false;  in sunxi_sram_release()
313 static bool sunxi_sram_regmap_accessible_reg(struct device *dev,  in sunxi_sram_regmap_accessible_reg()
319 	    reg <  SUNXI_SRAM_EMAC_CLOCK_REG + variant->num_emac_clocks * 4)  in sunxi_sram_regmap_accessible_reg()
321 	if (reg == SUNXI_SYS_LDO_CTRL_REG && variant->has_ldo_ctrl)  in sunxi_sram_regmap_accessible_reg()
341 	struct device *dev = &pdev->dev;  in sunxi_sram_probe()
344 	sram_dev = &pdev->dev;  in sunxi_sram_probe()
346 	variant = of_device_get_match_data(&pdev->dev);  in sunxi_sram_probe()
348 		return -EINVAL;  in sunxi_sram_probe()
356 	if (variant->num_emac_clocks || variant->has_ldo_ctrl) {  in sunxi_sram_probe()
362 	of_platform_populate(dev->of_node, NULL, NULL, dev);  in sunxi_sram_probe()
364 	debugfs_create_file("sram", 0444, NULL, NULL, &sunxi_sram_fops);  in sunxi_sram_probe()
371 		.compatible = "allwinner,sun4i-a10-sram-controller",
375 		.compatible = "allwinner,sun4i-a10-system-control",
379 		.compatible = "allwinner,sun5i-a13-system-control",
383 		.compatible = "allwinner,sun8i-a23-system-control",
387 		.compatible = "allwinner,sun8i-h3-system-control",
391 		.compatible = "allwinner,sun20i-d1-system-control",
395 		.compatible = "allwinner,sun50i-a64-sram-controller",
399 		.compatible = "allwinner,sun50i-a64-system-control",
403 		.compatible = "allwinner,sun50i-h5-system-control",
407 		.compatible = "allwinner,sun50i-h616-system-control",
416 		.name		= "sunxi-sram",
422 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
423 MODULE_DESCRIPTION("Allwinner sunXi SRAM Controller Driver");