1 // SPDX-License-Identifier: GPL-2.0+
20 #include "imx-audmux.h"
22 #define DRIVER_NAME "imx-audmux"
37 static const char *audmux_port_string(int port)  in audmux_port_string()  argument
39 	switch (port) {  in audmux_port_string()
41 		return "imx-ssi.0";  in audmux_port_string()
43 		return "imx-ssi.1";  in audmux_port_string()
62 	uintptr_t port = (uintptr_t)file->private_data;  in audmux_read_file()  local
71 	ptcr = readl(audmux_base + IMX_AUDMUX_V2_PTCR(port));  in audmux_read_file()
72 	pdcr = readl(audmux_base + IMX_AUDMUX_V2_PDCR(port));  in audmux_read_file()
79 		return -ENOMEM;  in audmux_read_file()
85 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
89 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
93 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
97 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
100 	ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");  in audmux_read_file()
103 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
104 				"Port is symmetric");  in audmux_read_file()
107 			ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
111 			ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
115 			ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
119 			ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
123 	ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
145 	audmux_debugfs_root = debugfs_create_dir("audmux", NULL);  in audmux_debugfs_init()
175 		.name = "imx21-audmux",
178 		.name = "imx31-audmux",
187 	{ .compatible = "fsl,imx21-audmux", .data = &imx_audmux_ids[0], },
188 	{ .compatible = "fsl,imx31-audmux", .data = &imx_audmux_ids[1], },
197 int imx_audmux_v1_configure_port(unsigned int port, unsigned int pcr)  in imx_audmux_v1_configure_port()  argument
200 		return -EINVAL;  in imx_audmux_v1_configure_port()
203 		return -ENOSYS;  in imx_audmux_v1_configure_port()
205 	if (port >= ARRAY_SIZE(port_mapping))  in imx_audmux_v1_configure_port()
206 		return -EINVAL;  in imx_audmux_v1_configure_port()
208 	writel(pcr, audmux_base + port_mapping[port]);  in imx_audmux_v1_configure_port()
214 int imx_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,  in imx_audmux_v2_configure_port()  argument
220 		return -EINVAL;  in imx_audmux_v2_configure_port()
223 		return -ENOSYS;  in imx_audmux_v2_configure_port()
231 	writel(ptcr, audmux_base + IMX_AUDMUX_V2_PTCR(port));  in imx_audmux_v2_configure_port()
232 	writel(pdcr, audmux_base + IMX_AUDMUX_V2_PDCR(port));  in imx_audmux_v2_configure_port()
247 		unsigned int port;  in imx_audmux_parse_dt_defaults()  local
255 		ret = of_property_read_u32(child, "fsl,audmux-port", &port);  in imx_audmux_parse_dt_defaults()
257 			dev_warn(&pdev->dev, "Failed to get fsl,audmux-port of child node \"%pOF\"\n",  in imx_audmux_parse_dt_defaults()
261 		if (!of_property_read_bool(child, "fsl,port-config")) {  in imx_audmux_parse_dt_defaults()
262 			dev_warn(&pdev->dev, "child node \"%pOF\" does not have property fsl,port-config\n",  in imx_audmux_parse_dt_defaults()
268 					"fsl,port-config", i, &val)) == 0;  in imx_audmux_parse_dt_defaults()
280 		if (ret != -EOVERFLOW) {  in imx_audmux_parse_dt_defaults()
281 			dev_err(&pdev->dev, "Failed to read u32 at index %d of child %pOF\n",  in imx_audmux_parse_dt_defaults()
288 				dev_err(&pdev->dev, "One pdcr value is missing in child node %pOF\n",  in imx_audmux_parse_dt_defaults()
292 			imx_audmux_v2_configure_port(port, ptcr, pdcr);  in imx_audmux_parse_dt_defaults()
294 			imx_audmux_v1_configure_port(port, pcr);  in imx_audmux_parse_dt_defaults()
304 			of_match_device(imx_audmux_dt_ids, &pdev->dev);  in imx_audmux_probe()
310 	audmux_clk = devm_clk_get(&pdev->dev, "audmux");  in imx_audmux_probe()
312 		dev_dbg(&pdev->dev, "cannot get clock: %ld\n",  in imx_audmux_probe()
318 		pdev->id_entry = of_id->data;  in imx_audmux_probe()
319 	audmux_type = pdev->id_entry->driver_data;  in imx_audmux_probe()
330 		dev_err(&pdev->dev, "unsupported version!\n");  in imx_audmux_probe()
331 		return -EINVAL;  in imx_audmux_probe()
334 	regcache = devm_kzalloc(&pdev->dev, sizeof(u32) * reg_max, GFP_KERNEL);  in imx_audmux_probe()
336 		return -ENOMEM;  in imx_audmux_probe()
339 		imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node);  in imx_audmux_probe()
409 MODULE_DESCRIPTION("Freescale i.MX AUDMUX driver");