dt-bindings: pinctrl: k3: Synchronize with v5.14 kernel
[platform/kernel/u-boot.git] / drivers / misc / i2c_eeprom.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2014 Google, Inc
4  */
5
6 #define LOG_CATEGORY UCLASS_I2C_EEPROM
7
8 #include <common.h>
9 #include <eeprom.h>
10 #include <linux/delay.h>
11 #include <linux/err.h>
12 #include <linux/kernel.h>
13 #include <dm.h>
14 #include <dm/device-internal.h>
15 #include <i2c.h>
16 #include <i2c_eeprom.h>
17
18 struct i2c_eeprom_drv_data {
19         u32 size; /* size in bytes */
20         u32 pagesize; /* page size in bytes */
21         u32 addr_offset_mask; /* bits in addr used for offset overflow */
22         u32 offset_len; /* size in bytes of offset */
23         u32 start_offset; /* valid start offset inside memory, by default 0 */
24 };
25
26 int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
27 {
28         const struct i2c_eeprom_ops *ops = device_get_ops(dev);
29
30         if (!ops->read)
31                 return -ENOSYS;
32
33         return ops->read(dev, offset, buf, size);
34 }
35
36 int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
37 {
38         const struct i2c_eeprom_ops *ops = device_get_ops(dev);
39
40         if (!ops->write)
41                 return -ENOSYS;
42
43         return ops->write(dev, offset, buf, size);
44 }
45
46 int i2c_eeprom_size(struct udevice *dev)
47 {
48         const struct i2c_eeprom_ops *ops = device_get_ops(dev);
49
50         if (!ops->size)
51                 return -ENOSYS;
52
53         return ops->size(dev);
54 }
55
56 static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
57                                int size)
58 {
59         return dm_i2c_read(dev, offset, buf, size);
60 }
61
62 static int i2c_eeprom_std_write(struct udevice *dev, int offset,
63                                 const uint8_t *buf, int size)
64 {
65         struct i2c_eeprom *priv = dev_get_priv(dev);
66         int ret;
67
68         while (size > 0) {
69                 int write_size = min_t(int, size, priv->pagesize);
70
71                 ret = dm_i2c_write(dev, offset, buf, write_size);
72                 if (ret)
73                         return ret;
74
75                 offset += write_size;
76                 buf += write_size;
77                 size -= write_size;
78
79                 udelay(10000);
80         }
81
82         return 0;
83 }
84
85 static int i2c_eeprom_std_size(struct udevice *dev)
86 {
87         struct i2c_eeprom *priv = dev_get_priv(dev);
88
89         return priv->size;
90 }
91
92 static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
93         .read   = i2c_eeprom_std_read,
94         .write  = i2c_eeprom_std_write,
95         .size   = i2c_eeprom_std_size,
96 };
97
98 static int i2c_eeprom_std_of_to_plat(struct udevice *dev)
99 {
100         struct i2c_eeprom *priv = dev_get_priv(dev);
101         struct i2c_eeprom_drv_data *data =
102                 (struct i2c_eeprom_drv_data *)dev_get_driver_data(dev);
103         u32 pagesize;
104         u32 size;
105
106         if (dev_read_u32(dev, "pagesize", &pagesize) == 0)
107                 priv->pagesize = pagesize;
108         else
109                 /* 6 bit -> page size of up to 2^63 (should be sufficient) */
110                 priv->pagesize = data->pagesize;
111
112         if (dev_read_u32(dev, "size", &size) == 0)
113                 priv->size = size;
114         else
115                 priv->size = data->size;
116
117         return 0;
118 }
119
120 static int i2c_eeprom_std_bind(struct udevice *dev)
121 {
122         ofnode partitions = ofnode_find_subnode(dev_ofnode(dev), "partitions");
123         ofnode partition;
124         const char *name;
125
126         if (!ofnode_valid(partitions))
127                 return 0;
128         if (!ofnode_device_is_compatible(partitions, "fixed-partitions"))
129                 return -ENOTSUPP;
130
131         ofnode_for_each_subnode(partition, partitions) {
132                 name = ofnode_get_name(partition);
133                 if (!name)
134                         continue;
135
136                 device_bind(dev, DM_DRIVER_GET(i2c_eeprom_partition), name,
137                             NULL, partition, NULL);
138         }
139
140         return 0;
141 }
142
143 static int i2c_eeprom_std_probe(struct udevice *dev)
144 {
145         u8 test_byte;
146         int ret;
147         struct i2c_eeprom_drv_data *data =
148                 (struct i2c_eeprom_drv_data *)dev_get_driver_data(dev);
149
150         i2c_set_chip_offset_len(dev, data->offset_len);
151         i2c_set_chip_addr_offset_mask(dev, data->addr_offset_mask);
152
153         /* Verify that the chip is functional */
154         /*
155          * Not all eeproms start from offset 0. Valid offset is available
156          * in the platform data struct.
157          */
158         ret = i2c_eeprom_read(dev, data->start_offset, &test_byte, 1);
159         if (ret)
160                 return -ENODEV;
161
162         return 0;
163 }
164
165 static const struct i2c_eeprom_drv_data eeprom_data = {
166         .size = 0,
167         .pagesize = 1,
168         .addr_offset_mask = 0,
169         .offset_len = 1,
170 };
171
172 static const struct i2c_eeprom_drv_data mc24aa02e48_data = {
173         .size = 256,
174         .pagesize = 8,
175         .addr_offset_mask = 0,
176         .offset_len = 1,
177 };
178
179 static const struct i2c_eeprom_drv_data atmel24c01a_data = {
180         .size = 128,
181         .pagesize = 8,
182         .addr_offset_mask = 0,
183         .offset_len = 1,
184 };
185
186 static const struct i2c_eeprom_drv_data atmel24c02_data = {
187         .size = 256,
188         .pagesize = 8,
189         .addr_offset_mask = 0,
190         .offset_len = 1,
191 };
192
193 static const struct i2c_eeprom_drv_data atmel24c04_data = {
194         .size = 512,
195         .pagesize = 16,
196         .addr_offset_mask = 0x1,
197         .offset_len = 1,
198 };
199
200 static const struct i2c_eeprom_drv_data atmel24c08_data = {
201         .size = 1024,
202         .pagesize = 16,
203         .addr_offset_mask = 0x3,
204         .offset_len = 1,
205 };
206
207 static const struct i2c_eeprom_drv_data atmel24c08a_data = {
208         .size = 1024,
209         .pagesize = 16,
210         .addr_offset_mask = 0x3,
211         .offset_len = 1,
212 };
213
214 static const struct i2c_eeprom_drv_data atmel24c16a_data = {
215         .size = 2048,
216         .pagesize = 16,
217         .addr_offset_mask = 0x7,
218         .offset_len = 1,
219 };
220
221 static const struct i2c_eeprom_drv_data atmel24mac402_data = {
222         .size = 256,
223         .pagesize = 16,
224         .addr_offset_mask = 0,
225         .offset_len = 1,
226         .start_offset = 0x80,
227 };
228
229 static const struct i2c_eeprom_drv_data atmel24c32_data = {
230         .size = 4096,
231         .pagesize = 32,
232         .addr_offset_mask = 0,
233         .offset_len = 2,
234 };
235
236 static const struct i2c_eeprom_drv_data atmel24c64_data = {
237         .size = 8192,
238         .pagesize = 32,
239         .addr_offset_mask = 0,
240         .offset_len = 2,
241 };
242
243 static const struct i2c_eeprom_drv_data atmel24c128_data = {
244         .size = 16384,
245         .pagesize = 64,
246         .addr_offset_mask = 0,
247         .offset_len = 2,
248 };
249
250 static const struct i2c_eeprom_drv_data atmel24c256_data = {
251         .size = 32768,
252         .pagesize = 64,
253         .addr_offset_mask = 0,
254         .offset_len = 2,
255 };
256
257 static const struct i2c_eeprom_drv_data atmel24c512_data = {
258         .size = 65536,
259         .pagesize = 64,
260         .addr_offset_mask = 0,
261         .offset_len = 2,
262 };
263
264 static const struct udevice_id i2c_eeprom_std_ids[] = {
265         { .compatible = "i2c-eeprom", (ulong)&eeprom_data },
266         { .compatible = "microchip,24aa02e48", (ulong)&mc24aa02e48_data },
267         { .compatible = "atmel,24c01", (ulong)&atmel24c01a_data },
268         { .compatible = "atmel,24c01a", (ulong)&atmel24c01a_data },
269         { .compatible = "atmel,24c02", (ulong)&atmel24c02_data },
270         { .compatible = "atmel,24c04", (ulong)&atmel24c04_data },
271         { .compatible = "atmel,24c08", (ulong)&atmel24c08_data },
272         { .compatible = "atmel,24c08a", (ulong)&atmel24c08a_data },
273         { .compatible = "atmel,24c16a", (ulong)&atmel24c16a_data },
274         { .compatible = "atmel,24mac402", (ulong)&atmel24mac402_data },
275         { .compatible = "atmel,24c32", (ulong)&atmel24c32_data },
276         { .compatible = "atmel,24c64", (ulong)&atmel24c64_data },
277         { .compatible = "atmel,24c128", (ulong)&atmel24c128_data },
278         { .compatible = "atmel,24c256", (ulong)&atmel24c256_data },
279         { .compatible = "atmel,24c512", (ulong)&atmel24c512_data },
280         { }
281 };
282
283 U_BOOT_DRIVER(i2c_eeprom_std) = {
284         .name                   = "i2c_eeprom",
285         .id                     = UCLASS_I2C_EEPROM,
286         .of_match               = i2c_eeprom_std_ids,
287         .bind                   = i2c_eeprom_std_bind,
288         .probe                  = i2c_eeprom_std_probe,
289         .of_to_plat     = i2c_eeprom_std_of_to_plat,
290         .priv_auto      = sizeof(struct i2c_eeprom),
291         .ops                    = &i2c_eeprom_std_ops,
292 };
293
294 struct i2c_eeprom_partition {
295         u32 offset;
296         u32 size;
297 };
298
299 static int i2c_eeprom_partition_probe(struct udevice *dev)
300 {
301         return 0;
302 }
303
304 static int i2c_eeprom_partition_of_to_plat(struct udevice *dev)
305 {
306         struct i2c_eeprom_partition *priv = dev_get_priv(dev);
307         u32 reg[2];
308         int ret;
309
310         ret = dev_read_u32_array(dev, "reg", reg, 2);
311         if (ret)
312                 return ret;
313
314         if (!reg[1])
315                 return -EINVAL;
316
317         priv->offset = reg[0];
318         priv->size = reg[1];
319
320         debug("%s: base %x, size %x\n", __func__, priv->offset, priv->size);
321
322         return 0;
323 }
324
325 static int i2c_eeprom_partition_read(struct udevice *dev, int offset,
326                                      u8 *buf, int size)
327 {
328         struct i2c_eeprom_partition *priv = dev_get_priv(dev);
329         struct udevice *parent = dev_get_parent(dev);
330
331         if (!parent)
332                 return -ENODEV;
333         if (offset + size > priv->size)
334                 return -EINVAL;
335
336         return i2c_eeprom_read(parent, offset + priv->offset, buf, size);
337 }
338
339 static int i2c_eeprom_partition_write(struct udevice *dev, int offset,
340                                       const u8 *buf, int size)
341 {
342         struct i2c_eeprom_partition *priv = dev_get_priv(dev);
343         struct udevice *parent = dev_get_parent(dev);
344
345         if (!parent)
346                 return -ENODEV;
347         if (offset + size > priv->size)
348                 return -EINVAL;
349
350         return i2c_eeprom_write(parent, offset + priv->offset, (uint8_t *)buf,
351                                 size);
352 }
353
354 static int i2c_eeprom_partition_size(struct udevice *dev)
355 {
356         struct i2c_eeprom_partition *priv = dev_get_priv(dev);
357
358         return priv->size;
359 }
360
361 static const struct i2c_eeprom_ops i2c_eeprom_partition_ops = {
362         .read   = i2c_eeprom_partition_read,
363         .write  = i2c_eeprom_partition_write,
364         .size   = i2c_eeprom_partition_size,
365 };
366
367 U_BOOT_DRIVER(i2c_eeprom_partition) = {
368         .name                   = "i2c_eeprom_partition",
369         .id                     = UCLASS_I2C_EEPROM,
370         .probe                  = i2c_eeprom_partition_probe,
371         .of_to_plat     = i2c_eeprom_partition_of_to_plat,
372         .priv_auto      = sizeof(struct i2c_eeprom_partition),
373         .ops                    = &i2c_eeprom_partition_ops,
374 };
375
376 UCLASS_DRIVER(i2c_eeprom) = {
377         .id             = UCLASS_I2C_EEPROM,
378         .name           = "i2c_eeprom",
379 };