This source file includes following definitions.
- append_str
- ec_get_log_entry
- cros_usbpd_print_log_entry
- cros_usbpd_log_check
- cros_usbpd_logger_probe
- cros_usbpd_logger_remove
- cros_usbpd_logger_resume
- cros_usbpd_logger_suspend
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8 #include <linux/ktime.h>
9 #include <linux/mfd/cros_ec.h>
10 #include <linux/math64.h>
11 #include <linux/module.h>
12 #include <linux/platform_data/cros_ec_commands.h>
13 #include <linux/platform_data/cros_ec_proto.h>
14 #include <linux/platform_device.h>
15 #include <linux/rtc.h>
16
17 #define DRV_NAME "cros-usbpd-logger"
18
19 #define CROS_USBPD_MAX_LOG_ENTRIES 30
20 #define CROS_USBPD_LOG_UPDATE_DELAY msecs_to_jiffies(60000)
21 #define CROS_USBPD_DATA_SIZE 16
22 #define CROS_USBPD_LOG_RESP_SIZE (sizeof(struct ec_response_pd_log) + \
23 CROS_USBPD_DATA_SIZE)
24 #define CROS_USBPD_BUFFER_SIZE (sizeof(struct cros_ec_command) + \
25 CROS_USBPD_LOG_RESP_SIZE)
26
27 #define BUF_SIZE 80
28
29 struct logger_data {
30 struct device *dev;
31 struct cros_ec_dev *ec_dev;
32 u8 ec_buffer[CROS_USBPD_BUFFER_SIZE];
33 struct delayed_work log_work;
34 struct workqueue_struct *log_workqueue;
35 };
36
37 static const char * const chg_type_names[] = {
38 "None", "PD", "Type-C", "Proprietary", "DCP", "CDP", "SDP",
39 "Other", "VBUS"
40 };
41
42 static const char * const role_names[] = {
43 "Disconnected", "SRC", "SNK", "SNK (not charging)"
44 };
45
46 static const char * const fault_names[] = {
47 "---", "OCP", "fast OCP", "OVP", "Discharge"
48 };
49
50 static int append_str(char *buf, int pos, const char *fmt, ...)
51 {
52 va_list args;
53 int i;
54
55 va_start(args, fmt);
56 i = vsnprintf(buf + pos, BUF_SIZE - pos, fmt, args);
57 va_end(args);
58
59 return i;
60 }
61
62 static struct ec_response_pd_log *ec_get_log_entry(struct logger_data *logger)
63 {
64 struct cros_ec_dev *ec_dev = logger->ec_dev;
65 struct cros_ec_command *msg;
66 int ret;
67
68 msg = (struct cros_ec_command *)logger->ec_buffer;
69
70 msg->command = ec_dev->cmd_offset + EC_CMD_PD_GET_LOG_ENTRY;
71 msg->insize = CROS_USBPD_LOG_RESP_SIZE;
72
73 ret = cros_ec_cmd_xfer_status(ec_dev->ec_dev, msg);
74 if (ret < 0)
75 return ERR_PTR(ret);
76
77 return (struct ec_response_pd_log *)msg->data;
78 }
79
80 static void cros_usbpd_print_log_entry(struct ec_response_pd_log *r,
81 ktime_t tstamp)
82 {
83 const char *fault, *role, *chg_type;
84 struct usb_chg_measures *meas;
85 struct mcdp_info *minfo;
86 int role_idx, type_idx;
87 char buf[BUF_SIZE + 1];
88 struct rtc_time rt;
89 int len = 0;
90 s32 rem;
91 int i;
92
93
94 tstamp = ktime_sub_us(tstamp, r->timestamp << PD_LOG_TIMESTAMP_SHIFT);
95 rt = rtc_ktime_to_tm(tstamp);
96
97 switch (r->type) {
98 case PD_EVENT_MCU_CHARGE:
99 if (r->data & CHARGE_FLAGS_OVERRIDE)
100 len += append_str(buf, len, "override ");
101
102 if (r->data & CHARGE_FLAGS_DELAYED_OVERRIDE)
103 len += append_str(buf, len, "pending_override ");
104
105 role_idx = r->data & CHARGE_FLAGS_ROLE_MASK;
106 role = role_idx < ARRAY_SIZE(role_names) ?
107 role_names[role_idx] : "Unknown";
108
109 type_idx = (r->data & CHARGE_FLAGS_TYPE_MASK)
110 >> CHARGE_FLAGS_TYPE_SHIFT;
111
112 chg_type = type_idx < ARRAY_SIZE(chg_type_names) ?
113 chg_type_names[type_idx] : "???";
114
115 if (role_idx == USB_PD_PORT_POWER_DISCONNECTED ||
116 role_idx == USB_PD_PORT_POWER_SOURCE) {
117 len += append_str(buf, len, "%s", role);
118 break;
119 }
120
121 meas = (struct usb_chg_measures *)r->payload;
122 len += append_str(buf, len, "%s %s %s %dmV max %dmV / %dmA",
123 role, r->data & CHARGE_FLAGS_DUAL_ROLE ?
124 "DRP" : "Charger",
125 chg_type, meas->voltage_now,
126 meas->voltage_max, meas->current_max);
127 break;
128 case PD_EVENT_ACC_RW_FAIL:
129 len += append_str(buf, len, "RW signature check failed");
130 break;
131 case PD_EVENT_PS_FAULT:
132 fault = r->data < ARRAY_SIZE(fault_names) ? fault_names[r->data]
133 : "???";
134 len += append_str(buf, len, "Power supply fault: %s", fault);
135 break;
136 case PD_EVENT_VIDEO_DP_MODE:
137 len += append_str(buf, len, "DP mode %sabled", r->data == 1 ?
138 "en" : "dis");
139 break;
140 case PD_EVENT_VIDEO_CODEC:
141 minfo = (struct mcdp_info *)r->payload;
142 len += append_str(buf, len, "HDMI info: family:%04x chipid:%04x ",
143 MCDP_FAMILY(minfo->family),
144 MCDP_CHIPID(minfo->chipid));
145 len += append_str(buf, len, "irom:%d.%d.%d fw:%d.%d.%d",
146 minfo->irom.major, minfo->irom.minor,
147 minfo->irom.build, minfo->fw.major,
148 minfo->fw.minor, minfo->fw.build);
149 break;
150 default:
151 len += append_str(buf, len, "Event %02x (%04x) [", r->type,
152 r->data);
153
154 for (i = 0; i < PD_LOG_SIZE(r->size_port); i++)
155 len += append_str(buf, len, "%02x ", r->payload[i]);
156
157 len += append_str(buf, len, "]");
158 break;
159 }
160
161 div_s64_rem(ktime_to_ms(tstamp), MSEC_PER_SEC, &rem);
162 pr_info("PDLOG %d/%02d/%02d %02d:%02d:%02d.%03d P%d %s\n",
163 rt.tm_year + 1900, rt.tm_mon + 1, rt.tm_mday,
164 rt.tm_hour, rt.tm_min, rt.tm_sec, rem,
165 PD_LOG_PORT(r->size_port), buf);
166 }
167
168 static void cros_usbpd_log_check(struct work_struct *work)
169 {
170 struct logger_data *logger = container_of(to_delayed_work(work),
171 struct logger_data,
172 log_work);
173 struct device *dev = logger->dev;
174 struct ec_response_pd_log *r;
175 int entries = 0;
176 ktime_t now;
177
178 while (entries++ < CROS_USBPD_MAX_LOG_ENTRIES) {
179 r = ec_get_log_entry(logger);
180 now = ktime_get_real();
181 if (IS_ERR(r)) {
182 dev_dbg(dev, "Cannot get PD log %ld\n", PTR_ERR(r));
183 break;
184 }
185 if (r->type == PD_EVENT_NO_ENTRY)
186 break;
187
188 cros_usbpd_print_log_entry(r, now);
189 }
190
191 queue_delayed_work(logger->log_workqueue, &logger->log_work,
192 CROS_USBPD_LOG_UPDATE_DELAY);
193 }
194
195 static int cros_usbpd_logger_probe(struct platform_device *pd)
196 {
197 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
198 struct device *dev = &pd->dev;
199 struct logger_data *logger;
200
201 logger = devm_kzalloc(dev, sizeof(*logger), GFP_KERNEL);
202 if (!logger)
203 return -ENOMEM;
204
205 logger->dev = dev;
206 logger->ec_dev = ec_dev;
207
208 platform_set_drvdata(pd, logger);
209
210
211 INIT_DELAYED_WORK(&logger->log_work, cros_usbpd_log_check);
212 logger->log_workqueue = create_singlethread_workqueue("cros_usbpd_log");
213 if (!logger->log_workqueue)
214 return -ENOMEM;
215
216 queue_delayed_work(logger->log_workqueue, &logger->log_work,
217 CROS_USBPD_LOG_UPDATE_DELAY);
218
219 return 0;
220 }
221
222 static int cros_usbpd_logger_remove(struct platform_device *pd)
223 {
224 struct logger_data *logger = platform_get_drvdata(pd);
225
226 cancel_delayed_work_sync(&logger->log_work);
227
228 return 0;
229 }
230
231 static int __maybe_unused cros_usbpd_logger_resume(struct device *dev)
232 {
233 struct logger_data *logger = dev_get_drvdata(dev);
234
235 queue_delayed_work(logger->log_workqueue, &logger->log_work,
236 CROS_USBPD_LOG_UPDATE_DELAY);
237
238 return 0;
239 }
240
241 static int __maybe_unused cros_usbpd_logger_suspend(struct device *dev)
242 {
243 struct logger_data *logger = dev_get_drvdata(dev);
244
245 cancel_delayed_work_sync(&logger->log_work);
246
247 return 0;
248 }
249
250 static SIMPLE_DEV_PM_OPS(cros_usbpd_logger_pm_ops, cros_usbpd_logger_suspend,
251 cros_usbpd_logger_resume);
252
253 static struct platform_driver cros_usbpd_logger_driver = {
254 .driver = {
255 .name = DRV_NAME,
256 .pm = &cros_usbpd_logger_pm_ops,
257 },
258 .probe = cros_usbpd_logger_probe,
259 .remove = cros_usbpd_logger_remove,
260 };
261
262 module_platform_driver(cros_usbpd_logger_driver);
263
264 MODULE_LICENSE("GPL v2");
265 MODULE_DESCRIPTION("Logging driver for ChromeOS EC USBPD Charger.");
266 MODULE_ALIAS("platform:" DRV_NAME);