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317f9d80 ER |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * Hardware monitoring driver for PIM4006, PIM4328 and PIM4820 | |
4 | * | |
5 | * Copyright (c) 2021 Flextronics International Sweden AB | |
6 | */ | |
7 | ||
8 | #include <linux/err.h> | |
9 | #include <linux/i2c.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/pmbus.h> | |
14 | #include <linux/slab.h> | |
15 | #include "pmbus.h" | |
16 | ||
17 | enum chips { pim4006, pim4328, pim4820 }; | |
18 | ||
19 | struct pim4328_data { | |
20 | enum chips id; | |
21 | struct pmbus_driver_info info; | |
22 | }; | |
23 | ||
24 | #define to_pim4328_data(x) container_of(x, struct pim4328_data, info) | |
25 | ||
26 | /* PIM4006 and PIM4328 */ | |
27 | #define PIM4328_MFR_READ_VINA 0xd3 | |
28 | #define PIM4328_MFR_READ_VINB 0xd4 | |
29 | ||
30 | /* PIM4006 */ | |
31 | #define PIM4328_MFR_READ_IINA 0xd6 | |
32 | #define PIM4328_MFR_READ_IINB 0xd7 | |
33 | #define PIM4328_MFR_FET_CHECKSTATUS 0xd9 | |
34 | ||
35 | /* PIM4328 */ | |
36 | #define PIM4328_MFR_STATUS_BITS 0xd5 | |
37 | ||
38 | /* PIM4820 */ | |
39 | #define PIM4328_MFR_READ_STATUS 0xd0 | |
40 | ||
41 | static const struct i2c_device_id pim4328_id[] = { | |
42 | {"bmr455", pim4328}, | |
43 | {"pim4006", pim4006}, | |
44 | {"pim4106", pim4006}, | |
45 | {"pim4206", pim4006}, | |
46 | {"pim4306", pim4006}, | |
47 | {"pim4328", pim4328}, | |
48 | {"pim4406", pim4006}, | |
49 | {"pim4820", pim4820}, | |
50 | {} | |
51 | }; | |
52 | MODULE_DEVICE_TABLE(i2c, pim4328_id); | |
53 | ||
54 | static int pim4328_read_word_data(struct i2c_client *client, int page, | |
55 | int phase, int reg) | |
56 | { | |
57 | int ret; | |
58 | ||
59 | if (page > 0) | |
60 | return -ENXIO; | |
61 | ||
62 | if (phase == 0xff) | |
63 | return -ENODATA; | |
64 | ||
65 | switch (reg) { | |
66 | case PMBUS_READ_VIN: | |
67 | ret = pmbus_read_word_data(client, page, phase, | |
68 | phase == 0 ? PIM4328_MFR_READ_VINA | |
69 | : PIM4328_MFR_READ_VINB); | |
70 | break; | |
71 | case PMBUS_READ_IIN: | |
72 | ret = pmbus_read_word_data(client, page, phase, | |
73 | phase == 0 ? PIM4328_MFR_READ_IINA | |
74 | : PIM4328_MFR_READ_IINB); | |
75 | break; | |
76 | default: | |
77 | ret = -ENODATA; | |
78 | } | |
79 | ||
80 | return ret; | |
81 | } | |
82 | ||
83 | static int pim4328_read_byte_data(struct i2c_client *client, int page, int reg) | |
84 | { | |
85 | const struct pmbus_driver_info *info = pmbus_get_driver_info(client); | |
86 | struct pim4328_data *data = to_pim4328_data(info); | |
87 | int ret, status; | |
88 | ||
89 | if (page > 0) | |
90 | return -ENXIO; | |
91 | ||
92 | switch (reg) { | |
93 | case PMBUS_STATUS_BYTE: | |
94 | ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE); | |
95 | if (ret < 0) | |
96 | return ret; | |
97 | if (data->id == pim4006) { | |
98 | status = pmbus_read_word_data(client, page, 0xff, | |
99 | PIM4328_MFR_FET_CHECKSTATUS); | |
100 | if (status < 0) | |
101 | return status; | |
102 | if (status & 0x0630) /* Input UV */ | |
103 | ret |= PB_STATUS_VIN_UV; | |
104 | } else if (data->id == pim4328) { | |
105 | status = pmbus_read_byte_data(client, page, | |
106 | PIM4328_MFR_STATUS_BITS); | |
107 | if (status < 0) | |
108 | return status; | |
109 | if (status & 0x04) /* Input UV */ | |
110 | ret |= PB_STATUS_VIN_UV; | |
111 | if (status & 0x40) /* Output UV */ | |
112 | ret |= PB_STATUS_NONE_ABOVE; | |
113 | } else if (data->id == pim4820) { | |
114 | status = pmbus_read_byte_data(client, page, | |
115 | PIM4328_MFR_READ_STATUS); | |
116 | if (status < 0) | |
117 | return status; | |
118 | if (status & 0x05) /* Input OV or OC */ | |
119 | ret |= PB_STATUS_NONE_ABOVE; | |
120 | if (status & 0x1a) /* Input UV */ | |
121 | ret |= PB_STATUS_VIN_UV; | |
122 | if (status & 0x40) /* OT */ | |
123 | ret |= PB_STATUS_TEMPERATURE; | |
124 | } | |
125 | break; | |
126 | default: | |
127 | ret = -ENODATA; | |
128 | } | |
129 | ||
130 | return ret; | |
131 | } | |
132 | ||
133 | static int pim4328_probe(struct i2c_client *client) | |
134 | { | |
135 | int status; | |
136 | u8 device_id[I2C_SMBUS_BLOCK_MAX + 1]; | |
137 | const struct i2c_device_id *mid; | |
138 | struct pim4328_data *data; | |
139 | struct pmbus_driver_info *info; | |
140 | struct pmbus_platform_data *pdata; | |
141 | struct device *dev = &client->dev; | |
142 | ||
143 | if (!i2c_check_functionality(client->adapter, | |
144 | I2C_FUNC_SMBUS_READ_BYTE_DATA | |
145 | | I2C_FUNC_SMBUS_BLOCK_DATA)) | |
146 | return -ENODEV; | |
147 | ||
148 | data = devm_kzalloc(&client->dev, sizeof(struct pim4328_data), | |
149 | GFP_KERNEL); | |
150 | if (!data) | |
151 | return -ENOMEM; | |
152 | ||
153 | status = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, device_id); | |
154 | if (status < 0) { | |
155 | dev_err(&client->dev, "Failed to read Manufacturer Model\n"); | |
156 | return status; | |
157 | } | |
158 | for (mid = pim4328_id; mid->name[0]; mid++) { | |
159 | if (!strncasecmp(mid->name, device_id, strlen(mid->name))) | |
160 | break; | |
161 | } | |
162 | if (!mid->name[0]) { | |
163 | dev_err(&client->dev, "Unsupported device\n"); | |
164 | return -ENODEV; | |
165 | } | |
166 | ||
167 | if (strcmp(client->name, mid->name)) | |
168 | dev_notice(&client->dev, | |
169 | "Device mismatch: Configured %s, detected %s\n", | |
170 | client->name, mid->name); | |
171 | ||
172 | data->id = mid->driver_data; | |
173 | info = &data->info; | |
174 | info->pages = 1; | |
175 | info->read_byte_data = pim4328_read_byte_data; | |
176 | info->read_word_data = pim4328_read_word_data; | |
177 | ||
178 | pdata = devm_kzalloc(dev, sizeof(struct pmbus_platform_data), | |
179 | GFP_KERNEL); | |
180 | if (!pdata) | |
181 | return -ENOMEM; | |
182 | dev->platform_data = pdata; | |
183 | pdata->flags = PMBUS_NO_CAPABILITY | PMBUS_NO_WRITE_PROTECT; | |
184 | ||
185 | switch (data->id) { | |
186 | case pim4006: | |
187 | info->phases[0] = 2; | |
188 | info->func[0] = PMBUS_PHASE_VIRTUAL | PMBUS_HAVE_VIN | |
189 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT; | |
190 | info->pfunc[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN; | |
191 | info->pfunc[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN; | |
192 | break; | |
193 | case pim4328: | |
194 | info->phases[0] = 2; | |
195 | info->func[0] = PMBUS_PHASE_VIRTUAL | |
196 | | PMBUS_HAVE_VCAP | PMBUS_HAVE_VIN | |
197 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT; | |
198 | info->pfunc[0] = PMBUS_HAVE_VIN; | |
199 | info->pfunc[1] = PMBUS_HAVE_VIN; | |
200 | info->format[PSC_VOLTAGE_IN] = direct; | |
201 | info->format[PSC_TEMPERATURE] = direct; | |
202 | info->format[PSC_CURRENT_OUT] = direct; | |
203 | pdata->flags |= PMBUS_USE_COEFFICIENTS_CMD; | |
204 | break; | |
205 | case pim4820: | |
206 | info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_TEMP | |
207 | | PMBUS_HAVE_IIN; | |
208 | info->format[PSC_VOLTAGE_IN] = direct; | |
209 | info->format[PSC_TEMPERATURE] = direct; | |
210 | info->format[PSC_CURRENT_IN] = direct; | |
211 | pdata->flags |= PMBUS_USE_COEFFICIENTS_CMD; | |
212 | break; | |
213 | default: | |
214 | return -ENODEV; | |
215 | } | |
216 | ||
217 | return pmbus_do_probe(client, info); | |
218 | } | |
219 | ||
220 | static struct i2c_driver pim4328_driver = { | |
221 | .driver = { | |
222 | .name = "pim4328", | |
223 | }, | |
224 | .probe_new = pim4328_probe, | |
225 | .id_table = pim4328_id, | |
226 | }; | |
227 | ||
228 | module_i2c_driver(pim4328_driver); | |
229 | ||
230 | MODULE_AUTHOR("Erik Rosen <erik.rosen@metormote.com>"); | |
231 | MODULE_DESCRIPTION("PMBus driver for PIM4006, PIM4328, PIM4820 power interface modules"); | |
232 | MODULE_LICENSE("GPL"); | |
233 | MODULE_IMPORT_NS(PMBUS); |