summaryrefslogtreecommitdiff
path: root/drivers/hwmon/pmbus/q54sj108a2.c
blob: fa298b4265a1c6807d074549d684040b11a628c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for Delta modules, Q54SJ108A2 series 1/4 Brick DC/DC
 * Regulated Power Module
 *
 * Copyright 2020 Delta LLC.
 */

#include <linux/debugfs.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include "pmbus.h"

#define STORE_DEFAULT_ALL		0x11
#define ERASE_BLACKBOX_DATA		0xD1
#define READ_HISTORY_EVENT_NUMBER	0xD2
#define READ_HISTORY_EVENTS		0xE0
#define SET_HISTORY_EVENT_OFFSET	0xE1
#define PMBUS_FLASH_KEY_WRITE		0xEC

enum chips {
	q54sj108a2
};

enum {
	Q54SJ108A2_DEBUGFS_OPERATION = 0,
	Q54SJ108A2_DEBUGFS_CLEARFAULT,
	Q54SJ108A2_DEBUGFS_WRITEPROTECT,
	Q54SJ108A2_DEBUGFS_STOREDEFAULT,
	Q54SJ108A2_DEBUGFS_VOOV_RESPONSE,
	Q54SJ108A2_DEBUGFS_IOOC_RESPONSE,
	Q54SJ108A2_DEBUGFS_PMBUS_VERSION,
	Q54SJ108A2_DEBUGFS_MFR_ID,
	Q54SJ108A2_DEBUGFS_MFR_MODEL,
	Q54SJ108A2_DEBUGFS_MFR_REVISION,
	Q54SJ108A2_DEBUGFS_MFR_LOCATION,
	Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE,
	Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET,
	Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET,
	Q54SJ108A2_DEBUGFS_BLACKBOX_READ,
	Q54SJ108A2_DEBUGFS_FLASH_KEY,
	Q54SJ108A2_DEBUGFS_NUM_ENTRIES
};

struct q54sj108a2_data {
	enum chips chip;
	struct i2c_client *client;

	int debugfs_entries[Q54SJ108A2_DEBUGFS_NUM_ENTRIES];
};

#define to_psu(x, y) container_of((x), struct q54sj108a2_data, debugfs_entries[(y)])

static struct pmbus_driver_info q54sj108a2_info[] = {
	[q54sj108a2] = {
		.pages = 1,

		/* Source : Delta Q54SJ108A2 */
		.format[PSC_TEMPERATURE] = linear,
		.format[PSC_VOLTAGE_IN] = linear,
		.format[PSC_CURRENT_OUT] = linear,

		.func[0] = PMBUS_HAVE_VIN |
		PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
		PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
		PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
		PMBUS_HAVE_STATUS_INPUT,
	},
};

static ssize_t q54sj108a2_debugfs_read(struct file *file, char __user *buf,
				       size_t count, loff_t *ppos)
{
	int rc;
	int *idxp = file->private_data;
	int idx = *idxp;
	struct q54sj108a2_data *psu = to_psu(idxp, idx);
	char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
	char data_char[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
	char *res;

	switch (idx) {
	case Q54SJ108A2_DEBUGFS_OPERATION:
		rc = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		break;
	case Q54SJ108A2_DEBUGFS_WRITEPROTECT:
		rc = i2c_smbus_read_byte_data(psu->client, PMBUS_WRITE_PROTECT);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		break;
	case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
		rc = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		break;
	case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
		rc = i2c_smbus_read_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		break;
	case Q54SJ108A2_DEBUGFS_PMBUS_VERSION:
		rc = i2c_smbus_read_byte_data(psu->client, PMBUS_REVISION);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		break;
	case Q54SJ108A2_DEBUGFS_MFR_ID:
		rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_ID, data);
		if (rc < 0)
			return rc;
		break;
	case Q54SJ108A2_DEBUGFS_MFR_MODEL:
		rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_MODEL, data);
		if (rc < 0)
			return rc;
		break;
	case Q54SJ108A2_DEBUGFS_MFR_REVISION:
		rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_REVISION, data);
		if (rc < 0)
			return rc;
		break;
	case Q54SJ108A2_DEBUGFS_MFR_LOCATION:
		rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_LOCATION, data);
		if (rc < 0)
			return rc;
		break;
	case Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET:
		rc = i2c_smbus_read_byte_data(psu->client, READ_HISTORY_EVENT_NUMBER);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		break;
	case Q54SJ108A2_DEBUGFS_BLACKBOX_READ:
		rc = i2c_smbus_read_block_data(psu->client, READ_HISTORY_EVENTS, data);
		if (rc < 0)
			return rc;

		res = bin2hex(data, data_char, 32);
		rc = res - data;

		break;
	case Q54SJ108A2_DEBUGFS_FLASH_KEY:
		rc = i2c_smbus_read_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, data);
		if (rc < 0)
			return rc;

		res = bin2hex(data, data_char, 4);
		rc = res - data;

		break;
	default:
		return -EINVAL;
	}

	data[rc] = '\n';
	rc += 2;

	return simple_read_from_buffer(buf, count, ppos, data, rc);
}

static ssize_t q54sj108a2_debugfs_write(struct file *file, const char __user *buf,
					size_t count, loff_t *ppos)
{
	u8 flash_key[4];
	u8 dst_data;
	ssize_t rc;
	int *idxp = file->private_data;
	int idx = *idxp;
	struct q54sj108a2_data *psu = to_psu(idxp, idx);

	rc = i2c_smbus_write_byte_data(psu->client, PMBUS_WRITE_PROTECT, 0);
	if (rc)
		return rc;

	switch (idx) {
	case Q54SJ108A2_DEBUGFS_OPERATION:
		rc = kstrtou8_from_user(buf, count, 0, &dst_data);
		if (rc < 0)
			return rc;

		rc = i2c_smbus_write_byte_data(psu->client, PMBUS_OPERATION, dst_data);
		if (rc < 0)
			return rc;

		break;
	case Q54SJ108A2_DEBUGFS_CLEARFAULT:
		rc = i2c_smbus_write_byte(psu->client, PMBUS_CLEAR_FAULTS);
		if (rc < 0)
			return rc;

		break;
	case Q54SJ108A2_DEBUGFS_STOREDEFAULT:
		flash_key[0] = 0x7E;
		flash_key[1] = 0x15;
		flash_key[2] = 0xDC;
		flash_key[3] = 0x42;
		rc = i2c_smbus_write_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, 4, flash_key);
		if (rc < 0)
			return rc;

		rc = i2c_smbus_write_byte(psu->client, STORE_DEFAULT_ALL);
		if (rc < 0)
			return rc;

		break;
	case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
		rc = kstrtou8_from_user(buf, count, 0, &dst_data);
		if (rc < 0)
			return rc;

		rc = i2c_smbus_write_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE, dst_data);
		if (rc < 0)
			return rc;

		break;
	case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
		rc = kstrtou8_from_user(buf, count, 0, &dst_data);
		if (rc < 0)
			return rc;

		rc = i2c_smbus_write_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE, dst_data);
		if (rc < 0)
			return rc;

		break;
	case Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE:
		rc = i2c_smbus_write_byte(psu->client, ERASE_BLACKBOX_DATA);
		if (rc < 0)
			return rc;

		break;
	case Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET:
		rc = kstrtou8_from_user(buf, count, 0, &dst_data);
		if (rc < 0)
			return rc;

		rc = i2c_smbus_write_byte_data(psu->client, SET_HISTORY_EVENT_OFFSET, dst_data);
		if (rc < 0)
			return rc;

		break;
	default:
		return -EINVAL;
	}

	return count;
}

static const struct file_operations q54sj108a2_fops = {
	.llseek = noop_llseek,
	.read = q54sj108a2_debugfs_read,
	.write = q54sj108a2_debugfs_write,
	.open = simple_open,
};

static const struct i2c_device_id q54sj108a2_id[] = {
	{ "q54sj108a2", q54sj108a2 },
	{ },
};

MODULE_DEVICE_TABLE(i2c, q54sj108a2_id);

static int q54sj108a2_probe(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
	enum chips chip_id;
	int ret, i;
	struct dentry *debugfs;
	struct dentry *q54sj108a2_dir;
	struct q54sj108a2_data *psu;

	if (!i2c_check_functionality(client->adapter,
				     I2C_FUNC_SMBUS_BYTE_DATA |
				     I2C_FUNC_SMBUS_WORD_DATA |
				     I2C_FUNC_SMBUS_BLOCK_DATA))
		return -ENODEV;

	if (client->dev.of_node)
		chip_id = (enum chips)(unsigned long)of_device_get_match_data(dev);
	else
		chip_id = i2c_match_id(q54sj108a2_id, client)->driver_data;

	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to read Manufacturer ID\n");
		return ret;
	}
	if (ret != 6 || strncmp(buf, "DELTA", 5)) {
		buf[ret] = '\0';
		dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);
		return -ENODEV;
	}

	/*
	 * The chips support reading PMBUS_MFR_MODEL.
	 */
	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
	if (ret < 0) {
		dev_err(dev, "Failed to read Manufacturer Model\n");
		return ret;
	}
	if (ret != 14 || strncmp(buf, "Q54SJ108A2", 10)) {
		buf[ret] = '\0';
		dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
		return -ENODEV;
	}

	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_REVISION, buf);
	if (ret < 0) {
		dev_err(dev, "Failed to read Manufacturer Revision\n");
		return ret;
	}
	if (ret != 4 || buf[0] != 'S') {
		buf[ret] = '\0';
		dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
		return -ENODEV;
	}

	ret = pmbus_do_probe(client, &q54sj108a2_info[chip_id]);
	if (ret)
		return ret;

	psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
	if (!psu)
		return 0;

	psu->client = client;

	debugfs = pmbus_get_debugfs_dir(client);

	q54sj108a2_dir = debugfs_create_dir(client->name, debugfs);

	for (i = 0; i < Q54SJ108A2_DEBUGFS_NUM_ENTRIES; ++i)
		psu->debugfs_entries[i] = i;

	debugfs_create_file("operation", 0644, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_OPERATION],
			    &q54sj108a2_fops);
	debugfs_create_file("clear_fault", 0200, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_CLEARFAULT],
			    &q54sj108a2_fops);
	debugfs_create_file("write_protect", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_WRITEPROTECT],
			    &q54sj108a2_fops);
	debugfs_create_file("store_default", 0200, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_STOREDEFAULT],
			    &q54sj108a2_fops);
	debugfs_create_file("vo_ov_response", 0644, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_VOOV_RESPONSE],
			    &q54sj108a2_fops);
	debugfs_create_file("io_oc_response", 0644, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_IOOC_RESPONSE],
			    &q54sj108a2_fops);
	debugfs_create_file("pmbus_revision", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_PMBUS_VERSION],
			    &q54sj108a2_fops);
	debugfs_create_file("mfr_id", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_ID],
			    &q54sj108a2_fops);
	debugfs_create_file("mfr_model", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_MODEL],
			    &q54sj108a2_fops);
	debugfs_create_file("mfr_revision", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_REVISION],
			    &q54sj108a2_fops);
	debugfs_create_file("mfr_location", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_LOCATION],
			    &q54sj108a2_fops);
	debugfs_create_file("blackbox_erase", 0200, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE],
			    &q54sj108a2_fops);
	debugfs_create_file("blackbox_read_offset", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET],
			    &q54sj108a2_fops);
	debugfs_create_file("blackbox_set_offset", 0200, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET],
			    &q54sj108a2_fops);
	debugfs_create_file("blackbox_read", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ],
			    &q54sj108a2_fops);
	debugfs_create_file("flash_key", 0444, q54sj108a2_dir,
			    &psu->debugfs_entries[Q54SJ108A2_DEBUGFS_FLASH_KEY],
			    &q54sj108a2_fops);

	return 0;
}

static const struct of_device_id q54sj108a2_of_match[] = {
	{ .compatible = "delta,q54sj108a2", .data = (void *)q54sj108a2 },
	{ },
};

MODULE_DEVICE_TABLE(of, q54sj108a2_of_match);

static struct i2c_driver q54sj108a2_driver = {
	.driver = {
		.name = "q54sj108a2",
		.of_match_table = q54sj108a2_of_match,
	},
	.probe_new = q54sj108a2_probe,
	.id_table = q54sj108a2_id,
};

module_i2c_driver(q54sj108a2_driver);

MODULE_AUTHOR("Xiao.Ma <xiao.mx.ma@deltaww.com>");
MODULE_DESCRIPTION("PMBus driver for Delta Q54SJ108A2 series modules");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);