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
69 	ptcr = readl(audmux_base + IMX_AUDMUX_V2_PTCR(port));  in audmux_read_file()
70 	pdcr = readl(audmux_base + IMX_AUDMUX_V2_PDCR(port));  in audmux_read_file()
76 		return -ENOMEM;  in audmux_read_file()
81 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  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()
96 	ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");  in audmux_read_file()
99 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,  in audmux_read_file()
100 				"Port is symmetric");  in audmux_read_file()
103 			ret += scnprintf(buf + ret, PAGE_SIZE - ret,  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()
141 	audmux_debugfs_root = debugfs_create_dir("audmux", NULL);  in audmux_debugfs_init()
170 	{ .compatible = "fsl,imx21-audmux", .data = (void *)IMX21_AUDMUX, },
171 	{ .compatible = "fsl,imx31-audmux", .data = (void *)IMX31_AUDMUX, },
180 int imx_audmux_v1_configure_port(unsigned int port, unsigned int pcr)  in imx_audmux_v1_configure_port()  argument
183 		return -EINVAL;  in imx_audmux_v1_configure_port()
186 		return -ENOSYS;  in imx_audmux_v1_configure_port()
188 	if (port >= ARRAY_SIZE(port_mapping))  in imx_audmux_v1_configure_port()
189 		return -EINVAL;  in imx_audmux_v1_configure_port()
191 	writel(pcr, audmux_base + port_mapping[port]);  in imx_audmux_v1_configure_port()
197 int imx_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,  in imx_audmux_v2_configure_port()  argument
203 		return -EINVAL;  in imx_audmux_v2_configure_port()
206 		return -ENOSYS;  in imx_audmux_v2_configure_port()
212 	writel(ptcr, audmux_base + IMX_AUDMUX_V2_PTCR(port));  in imx_audmux_v2_configure_port()
213 	writel(pdcr, audmux_base + IMX_AUDMUX_V2_PDCR(port));  in imx_audmux_v2_configure_port()
227 		unsigned int port;  in imx_audmux_parse_dt_defaults()  local
235 		ret = of_property_read_u32(child, "fsl,audmux-port", &port);  in imx_audmux_parse_dt_defaults()
237 			dev_warn(&pdev->dev, "Failed to get fsl,audmux-port of child node \"%pOF\"\n",  in imx_audmux_parse_dt_defaults()
241 		if (!of_property_read_bool(child, "fsl,port-config")) {  in imx_audmux_parse_dt_defaults()
242 			dev_warn(&pdev->dev, "child node \"%pOF\" does not have property fsl,port-config\n",  in imx_audmux_parse_dt_defaults()
248 					"fsl,port-config", i, &val)) == 0;  in imx_audmux_parse_dt_defaults()
260 		if (ret != -EOVERFLOW) {  in imx_audmux_parse_dt_defaults()
261 			dev_err(&pdev->dev, "Failed to read u32 at index %d of child %pOF\n",  in imx_audmux_parse_dt_defaults()
268 				dev_err(&pdev->dev, "One pdcr value is missing in child node %pOF\n",  in imx_audmux_parse_dt_defaults()
272 			imx_audmux_v2_configure_port(port, ptcr, pdcr);  in imx_audmux_parse_dt_defaults()
274 			imx_audmux_v1_configure_port(port, pcr);  in imx_audmux_parse_dt_defaults()
287 	audmux_clk = devm_clk_get(&pdev->dev, "audmux");  in imx_audmux_probe()
289 		dev_dbg(&pdev->dev, "cannot get clock: %ld\n",  in imx_audmux_probe()
294 	audmux_type = (uintptr_t)of_device_get_match_data(&pdev->dev);  in imx_audmux_probe()
305 		dev_err(&pdev->dev, "unsupported version!\n");  in imx_audmux_probe()
306 		return -EINVAL;  in imx_audmux_probe()
309 	regcache = devm_kzalloc(&pdev->dev, sizeof(u32) * reg_max, GFP_KERNEL);  in imx_audmux_probe()
311 		return -ENOMEM;  in imx_audmux_probe()
313 	imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node);  in imx_audmux_probe()
380 MODULE_DESCRIPTION("Freescale i.MX AUDMUX driver");