20 #include <linux/aspeed-lpc-ctrl.h>
22 #define DEVICE_NAME	"aspeed-lpc-ctrl"
43 	return container_of(file->private_data, struct aspeed_lpc_ctrl,  in file_aspeed_lpc_ctrl()
50 	unsigned long vsize = vma->vm_end - vma->vm_start;  in aspeed_lpc_ctrl_mmap()
51 	pgprot_t prot = vma->vm_page_prot;  in aspeed_lpc_ctrl_mmap()
53 	if (vma->vm_pgoff + vsize > lpc_ctrl->mem_base + lpc_ctrl->mem_size)  in aspeed_lpc_ctrl_mmap()
54 		return -EINVAL;  in aspeed_lpc_ctrl_mmap()
56 	/* ast2400/2500 AHB accesses are not cache coherent */  in aspeed_lpc_ctrl_mmap()
59 	if (remap_pfn_range(vma, vma->vm_start,  in aspeed_lpc_ctrl_mmap()
60 		(lpc_ctrl->mem_base >> PAGE_SHIFT) + vma->vm_pgoff,  in aspeed_lpc_ctrl_mmap()
62 		return -EAGAIN;  in aspeed_lpc_ctrl_mmap()
73 	u32 addr;  in aspeed_lpc_ctrl_ioctl()  local
78 		return -EFAULT;  in aspeed_lpc_ctrl_ioctl()
81 		return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
87 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
91 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
93 		map.size = lpc_ctrl->mem_size;  in aspeed_lpc_ctrl_ioctl()
95 		return copy_to_user(p, &map, sizeof(map)) ? -EFAULT : 0;  in aspeed_lpc_ctrl_ioctl()
119 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
122 		 * Because of the way the masks work in HICR8 offset has to  in aspeed_lpc_ctrl_ioctl()
125 		if (map.offset & (map.size - 1))  in aspeed_lpc_ctrl_ioctl()
126 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
129 			addr = lpc_ctrl->pnor_base;  in aspeed_lpc_ctrl_ioctl()
130 			size = lpc_ctrl->pnor_size;  in aspeed_lpc_ctrl_ioctl()
132 			addr = lpc_ctrl->mem_base;  in aspeed_lpc_ctrl_ioctl()
133 			size = lpc_ctrl->mem_size;  in aspeed_lpc_ctrl_ioctl()
135 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
141 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
144 			return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
146 		addr += map.offset;  in aspeed_lpc_ctrl_ioctl()
149 		 * addr (host lpc address) is safe regardless of values. This  in aspeed_lpc_ctrl_ioctl()
157 		rc = regmap_write(lpc_ctrl->regmap, HICR7,  in aspeed_lpc_ctrl_ioctl()
158 				(addr | (map.addr >> 16)));  in aspeed_lpc_ctrl_ioctl()
162 		rc = regmap_write(lpc_ctrl->regmap, HICR8,  in aspeed_lpc_ctrl_ioctl()
163 				(~(map.size - 1)) | ((map.size >> 16) - 1));  in aspeed_lpc_ctrl_ioctl()
171 		return regmap_update_bits(lpc_ctrl->regmap, HICR5,  in aspeed_lpc_ctrl_ioctl()
176 	return -EINVAL;  in aspeed_lpc_ctrl_ioctl()
193 	dev = &pdev->dev;  in aspeed_lpc_ctrl_probe()
197 		return -ENOMEM;  in aspeed_lpc_ctrl_probe()
199 	node = of_parse_phandle(dev->of_node, "flash", 0);  in aspeed_lpc_ctrl_probe()
202 		return -ENODEV;  in aspeed_lpc_ctrl_probe()
212 	lpc_ctrl->pnor_size = resource_size(&resm);  in aspeed_lpc_ctrl_probe()
213 	lpc_ctrl->pnor_base = resm.start;  in aspeed_lpc_ctrl_probe()
215 	dev_set_drvdata(&pdev->dev, lpc_ctrl);  in aspeed_lpc_ctrl_probe()
217 	node = of_parse_phandle(dev->of_node, "memory-region", 0);  in aspeed_lpc_ctrl_probe()
220 		return -EINVAL;  in aspeed_lpc_ctrl_probe()
227 		return -ENOMEM;  in aspeed_lpc_ctrl_probe()
230 	lpc_ctrl->mem_size = resource_size(&resm);  in aspeed_lpc_ctrl_probe()
231 	lpc_ctrl->mem_base = resm.start;  in aspeed_lpc_ctrl_probe()
233 	lpc_ctrl->regmap = syscon_node_to_regmap(  in aspeed_lpc_ctrl_probe()
234 			pdev->dev.parent->of_node);  in aspeed_lpc_ctrl_probe()
235 	if (IS_ERR(lpc_ctrl->regmap)) {  in aspeed_lpc_ctrl_probe()
237 		return -ENODEV;  in aspeed_lpc_ctrl_probe()
240 	lpc_ctrl->clk = devm_clk_get(dev, NULL);  in aspeed_lpc_ctrl_probe()
241 	if (IS_ERR(lpc_ctrl->clk)) {  in aspeed_lpc_ctrl_probe()
243 		return PTR_ERR(lpc_ctrl->clk);  in aspeed_lpc_ctrl_probe()
245 	rc = clk_prepare_enable(lpc_ctrl->clk);  in aspeed_lpc_ctrl_probe()
251 	lpc_ctrl->miscdev.minor = MISC_DYNAMIC_MINOR;  in aspeed_lpc_ctrl_probe()
252 	lpc_ctrl->miscdev.name = DEVICE_NAME;  in aspeed_lpc_ctrl_probe()
253 	lpc_ctrl->miscdev.fops = &aspeed_lpc_ctrl_fops;  in aspeed_lpc_ctrl_probe()
254 	lpc_ctrl->miscdev.parent = dev;  in aspeed_lpc_ctrl_probe()
255 	rc = misc_register(&lpc_ctrl->miscdev);  in aspeed_lpc_ctrl_probe()
266 	clk_disable_unprepare(lpc_ctrl->clk);  in aspeed_lpc_ctrl_probe()
272 	struct aspeed_lpc_ctrl *lpc_ctrl = dev_get_drvdata(&pdev->dev);  in aspeed_lpc_ctrl_remove()
274 	misc_deregister(&lpc_ctrl->miscdev);  in aspeed_lpc_ctrl_remove()
275 	clk_disable_unprepare(lpc_ctrl->clk);  in aspeed_lpc_ctrl_remove()
281 	{ .compatible = "aspeed,ast2400-lpc-ctrl" },
282 	{ .compatible = "aspeed,ast2500-lpc-ctrl" },