1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright(c) 2017-2019 Intel Corporation.
24 	/* create the debugfs master-N */  in sdw_bus_debugfs_init()
25 	snprintf(name, sizeof(name), "master-%d-%d", bus->controller_id, bus->link_id);  in sdw_bus_debugfs_init()
26 	bus->debugfs = debugfs_create_dir(name, sdw_debugfs_root);  in sdw_bus_debugfs_init()
31 	debugfs_remove_recursive(bus->debugfs);  in sdw_bus_debugfs_exit()
36 static ssize_t sdw_sprintf(struct sdw_slave *slave,  in sdw_sprintf()  argument
41 	value = sdw_read_no_pm(slave, reg);  in sdw_sprintf()
44 		return scnprintf(buf + pos, RD_BUF - pos, "%3x\tXX\n", reg);  in sdw_sprintf()
46 		return scnprintf(buf + pos, RD_BUF - pos,  in sdw_sprintf()
52 	struct sdw_slave *slave = s_file->private;  in sdw_slave_reg_show()  local
58 		return -ENOMEM;  in sdw_slave_reg_show()
60 	ret = pm_runtime_get_sync(&slave->dev);  in sdw_slave_reg_show()
61 	if (ret < 0 && ret != -EACCES) {  in sdw_slave_reg_show()
62 		pm_runtime_put_noidle(&slave->dev);  in sdw_slave_reg_show()
68 	/* DP0 non-banked registers */  in sdw_slave_reg_show()
69 	ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP0\n");  in sdw_slave_reg_show()
71 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
74 	ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n");  in sdw_slave_reg_show()
75 	ret += sdw_sprintf(slave, buf, ret, SDW_DP0_CHANNELEN);  in sdw_slave_reg_show()
77 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
80 	ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n");  in sdw_slave_reg_show()
81 	ret += sdw_sprintf(slave, buf, ret,  in sdw_slave_reg_show()
85 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
88 	ret += scnprintf(buf + ret, RD_BUF - ret, "\nSCP\n");  in sdw_slave_reg_show()
90 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
92 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
94 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
96 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
98 		ret += sdw_sprintf(slave, buf, ret, i);  in sdw_slave_reg_show()
102 	 * SCP Bank 0/1 registers are read-only and cannot be  in sdw_slave_reg_show()
103 	 * retrieved from the Slave. The Master typically keeps track  in sdw_slave_reg_show()
112 		ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP%d\n", i);  in sdw_slave_reg_show()
114 			ret += sdw_sprintf(slave, buf, ret, j);  in sdw_slave_reg_show()
117 		ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n");  in sdw_slave_reg_show()
120 			ret += sdw_sprintf(slave, buf, ret, j);  in sdw_slave_reg_show()
123 		ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n");  in sdw_slave_reg_show()
126 			ret += sdw_sprintf(slave, buf, ret, j);  in sdw_slave_reg_show()
131 	pm_runtime_mark_last_busy(&slave->dev);  in sdw_slave_reg_show()
132 	pm_runtime_put(&slave->dev);  in sdw_slave_reg_show()
148 	struct sdw_slave *slave = data;  in set_command()  local
151 		return -EINVAL;  in set_command()
153 	/* Userspace changed the hardware state behind the kernel's back */  in set_command()
156 	dev_dbg(&slave->dev, "command: %s\n", value ? "read" : "write");  in set_command()
166 	struct sdw_slave *slave = data;  in set_start_address()  local
168 	/* Userspace changed the hardware state behind the kernel's back */  in set_start_address()
171 	dev_dbg(&slave->dev, "start address %#llx\n", value);  in set_start_address()
182 	struct sdw_slave *slave = data;  in set_num_bytes()  local
185 		return -EINVAL;  in set_num_bytes()
187 	/* Userspace changed the hardware state behind the kernel's back */  in set_num_bytes()
190 	dev_dbg(&slave->dev, "number of bytes %lld\n", value);  in set_num_bytes()
201 	struct sdw_slave *slave = data;  in cmd_go()  local
205 		return -EINVAL;  in cmd_go()
210 		return -EINVAL;  in cmd_go()
212 	ret = pm_runtime_get_sync(&slave->dev);  in cmd_go()
213 	if (ret < 0 && ret != -EACCES) {  in cmd_go()
214 		pm_runtime_put_noidle(&slave->dev);  in cmd_go()
218 	/* Userspace changed the hardware state behind the kernel's back */  in cmd_go()
221 	dev_dbg(&slave->dev, "starting command\n");  in cmd_go()
226 		ret = request_firmware(&fw, firmware_file, &slave->dev);  in cmd_go()
228 			dev_err(&slave->dev, "firmware %s not found\n", firmware_file);  in cmd_go()
232 		if (fw->size != num_bytes) {  in cmd_go()
233 			dev_err(&slave->dev,  in cmd_go()
235 				firmware_file, fw->size, num_bytes);  in cmd_go()
240 		ret = sdw_nwrite_no_pm(slave, start_addr, num_bytes, fw->data);  in cmd_go()
243 		ret = sdw_nread_no_pm(slave, start_addr, num_bytes, read_buffer);  in cmd_go()
246 	dev_dbg(&slave->dev, "command completed %d\n", ret);  in cmd_go()
249 	pm_runtime_mark_last_busy(&slave->dev);  in cmd_go()
250 	pm_runtime_put(&slave->dev);  in cmd_go()
265 		return -EINVAL;  in read_buffer_show()
277 void sdw_slave_debugfs_init(struct sdw_slave *slave)  in sdw_slave_debugfs_init()  argument
283 	master = slave->bus->debugfs;  in sdw_slave_debugfs_init()
285 	/* create the debugfs slave-name */  in sdw_slave_debugfs_init()
286 	snprintf(name, sizeof(name), "%s", dev_name(&slave->dev));  in sdw_slave_debugfs_init()
289 	debugfs_create_file("registers", 0400, d, slave, &sdw_slave_reg_fops);  in sdw_slave_debugfs_init()
292 	debugfs_create_file("command", 0200, d, slave, &set_command_fops);  in sdw_slave_debugfs_init()
293 	debugfs_create_file("start_address", 0200, d, slave, &set_start_address_fops);  in sdw_slave_debugfs_init()
294 	debugfs_create_file("num_bytes", 0200, d, slave, &set_num_bytes_fops);  in sdw_slave_debugfs_init()
295 	debugfs_create_file("go", 0200, d, slave, &cmd_go_fops);  in sdw_slave_debugfs_init()
297 	debugfs_create_file("read_buffer", 0400, d, slave, &read_buffer_fops);  in sdw_slave_debugfs_init()
301 	slave->debugfs = d;  in sdw_slave_debugfs_init()
304 void sdw_slave_debugfs_exit(struct sdw_slave *slave)  in sdw_slave_debugfs_exit()  argument
306 	debugfs_remove_recursive(slave->debugfs);  in sdw_slave_debugfs_exit()