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7#include <common.h>
8#include <dm.h>
9#include <errno.h>
10#include <linux/libfdt.h>
11#include <malloc.h>
12#include <mapmem.h>
13#include <regmap.h>
14#include <asm/io.h>
15#include <dm/of_addr.h>
16#include <linux/ioport.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19
20
21
22
23
24
25
26static struct regmap *regmap_alloc(int count)
27{
28 struct regmap *map;
29
30 map = malloc(sizeof(*map) + sizeof(map->ranges[0]) * count);
31 if (!map)
32 return NULL;
33 map->range_count = count;
34
35 return map;
36}
37
38#if CONFIG_IS_ENABLED(OF_PLATDATA)
39int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
40 struct regmap **mapp)
41{
42 struct regmap_range *range;
43 struct regmap *map;
44
45 map = regmap_alloc(count);
46 if (!map)
47 return -ENOMEM;
48
49 for (range = map->ranges; count > 0; reg += 2, range++, count--) {
50 range->start = *reg;
51 range->size = reg[1];
52 }
53
54 *mapp = map;
55
56 return 0;
57}
58#else
59
60
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70
71
72
73static int init_range(ofnode node, struct regmap_range *range, int addr_len,
74 int size_len, int index)
75{
76 fdt_size_t sz;
77 struct resource r;
78
79 if (of_live_active()) {
80 int ret;
81
82 ret = of_address_to_resource(ofnode_to_np(node),
83 index, &r);
84 if (ret) {
85 debug("%s: Could not read resource of range %d (ret = %d)\n",
86 ofnode_get_name(node), index, ret);
87 return ret;
88 }
89
90 range->start = r.start;
91 range->size = r.end - r.start + 1;
92 } else {
93 int offset = ofnode_to_offset(node);
94
95 range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob, offset,
96 "reg", index,
97 addr_len, size_len,
98 &sz, true);
99 if (range->start == FDT_ADDR_T_NONE) {
100 debug("%s: Could not read start of range %d\n",
101 ofnode_get_name(node), index);
102 return -EINVAL;
103 }
104
105 range->size = sz;
106 }
107
108 return 0;
109}
110
111int regmap_init_mem_index(ofnode node, struct regmap **mapp, int index)
112{
113 struct regmap *map;
114 int addr_len, size_len;
115 int ret;
116
117 addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
118 if (addr_len < 0) {
119 debug("%s: Error while reading the addr length (ret = %d)\n",
120 ofnode_get_name(node), addr_len);
121 return addr_len;
122 }
123
124 size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node));
125 if (size_len < 0) {
126 debug("%s: Error while reading the size length: (ret = %d)\n",
127 ofnode_get_name(node), size_len);
128 return size_len;
129 }
130
131 map = regmap_alloc(1);
132 if (!map)
133 return -ENOMEM;
134
135 ret = init_range(node, map->ranges, addr_len, size_len, index);
136 if (ret)
137 goto err;
138
139 if (ofnode_read_bool(node, "little-endian"))
140 map->endianness = REGMAP_LITTLE_ENDIAN;
141 else if (ofnode_read_bool(node, "big-endian"))
142 map->endianness = REGMAP_BIG_ENDIAN;
143 else if (ofnode_read_bool(node, "native-endian"))
144 map->endianness = REGMAP_NATIVE_ENDIAN;
145 else
146 map->endianness = REGMAP_NATIVE_ENDIAN;
147
148 *mapp = map;
149
150 return 0;
151err:
152 regmap_uninit(map);
153
154 return ret;
155}
156
157int regmap_init_mem(ofnode node, struct regmap **mapp)
158{
159 struct regmap_range *range;
160 struct regmap *map;
161 int count;
162 int addr_len, size_len, both_len;
163 int len;
164 int index;
165 int ret;
166
167 addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
168 if (addr_len < 0) {
169 debug("%s: Error while reading the addr length (ret = %d)\n",
170 ofnode_get_name(node), addr_len);
171 return addr_len;
172 }
173
174 size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node));
175 if (size_len < 0) {
176 debug("%s: Error while reading the size length: (ret = %d)\n",
177 ofnode_get_name(node), size_len);
178 return size_len;
179 }
180
181 both_len = addr_len + size_len;
182 if (!both_len) {
183 debug("%s: Both addr and size length are zero\n",
184 ofnode_get_name(node));
185 return -EINVAL;
186 }
187
188 len = ofnode_read_size(node, "reg");
189 if (len < 0) {
190 debug("%s: Error while reading reg size (ret = %d)\n",
191 ofnode_get_name(node), len);
192 return len;
193 }
194 len /= sizeof(fdt32_t);
195 count = len / both_len;
196 if (!count) {
197 debug("%s: Not enough data in reg property\n",
198 ofnode_get_name(node));
199 return -EINVAL;
200 }
201
202 map = regmap_alloc(count);
203 if (!map)
204 return -ENOMEM;
205
206 for (range = map->ranges, index = 0; count > 0;
207 count--, range++, index++) {
208 ret = init_range(node, range, addr_len, size_len, index);
209 if (ret)
210 goto err;
211 }
212
213 if (ofnode_read_bool(node, "little-endian"))
214 map->endianness = REGMAP_LITTLE_ENDIAN;
215 else if (ofnode_read_bool(node, "big-endian"))
216 map->endianness = REGMAP_BIG_ENDIAN;
217 else if (ofnode_read_bool(node, "native-endian"))
218 map->endianness = REGMAP_NATIVE_ENDIAN;
219 else
220 map->endianness = REGMAP_NATIVE_ENDIAN;
221
222 *mapp = map;
223
224 return 0;
225err:
226 regmap_uninit(map);
227
228 return ret;
229}
230#endif
231
232void *regmap_get_range(struct regmap *map, unsigned int range_num)
233{
234 struct regmap_range *range;
235
236 if (range_num >= map->range_count)
237 return NULL;
238 range = &map->ranges[range_num];
239
240 return map_sysmem(range->start, range->size);
241}
242
243int regmap_uninit(struct regmap *map)
244{
245 free(map);
246
247 return 0;
248}
249
250static inline u8 __read_8(u8 *addr, enum regmap_endianness_t endianness)
251{
252 return readb(addr);
253}
254
255static inline u16 __read_16(u16 *addr, enum regmap_endianness_t endianness)
256{
257 switch (endianness) {
258 case REGMAP_LITTLE_ENDIAN:
259 return in_le16(addr);
260 case REGMAP_BIG_ENDIAN:
261 return in_be16(addr);
262 case REGMAP_NATIVE_ENDIAN:
263 return readw(addr);
264 }
265
266 return readw(addr);
267}
268
269static inline u32 __read_32(u32 *addr, enum regmap_endianness_t endianness)
270{
271 switch (endianness) {
272 case REGMAP_LITTLE_ENDIAN:
273 return in_le32(addr);
274 case REGMAP_BIG_ENDIAN:
275 return in_be32(addr);
276 case REGMAP_NATIVE_ENDIAN:
277 return readl(addr);
278 }
279
280 return readl(addr);
281}
282
283#if defined(in_le64) && defined(in_be64) && defined(readq)
284static inline u64 __read_64(u64 *addr, enum regmap_endianness_t endianness)
285{
286 switch (endianness) {
287 case REGMAP_LITTLE_ENDIAN:
288 return in_le64(addr);
289 case REGMAP_BIG_ENDIAN:
290 return in_be64(addr);
291 case REGMAP_NATIVE_ENDIAN:
292 return readq(addr);
293 }
294
295 return readq(addr);
296}
297#endif
298
299int regmap_raw_read_range(struct regmap *map, uint range_num, uint offset,
300 void *valp, size_t val_len)
301{
302 struct regmap_range *range;
303 void *ptr;
304
305 if (range_num >= map->range_count) {
306 debug("%s: range index %d larger than range count\n",
307 __func__, range_num);
308 return -ERANGE;
309 }
310 range = &map->ranges[range_num];
311
312 ptr = map_physmem(range->start + offset, val_len, MAP_NOCACHE);
313
314 if (offset + val_len > range->size) {
315 debug("%s: offset/size combination invalid\n", __func__);
316 return -ERANGE;
317 }
318
319 switch (val_len) {
320 case REGMAP_SIZE_8:
321 *((u8 *)valp) = __read_8(ptr, map->endianness);
322 break;
323 case REGMAP_SIZE_16:
324 *((u16 *)valp) = __read_16(ptr, map->endianness);
325 break;
326 case REGMAP_SIZE_32:
327 *((u32 *)valp) = __read_32(ptr, map->endianness);
328 break;
329#if defined(in_le64) && defined(in_be64) && defined(readq)
330 case REGMAP_SIZE_64:
331 *((u64 *)valp) = __read_64(ptr, map->endianness);
332 break;
333#endif
334 default:
335 debug("%s: regmap size %zu unknown\n", __func__, val_len);
336 return -EINVAL;
337 }
338
339 return 0;
340}
341
342int regmap_raw_read(struct regmap *map, uint offset, void *valp, size_t val_len)
343{
344 return regmap_raw_read_range(map, 0, offset, valp, val_len);
345}
346
347int regmap_read(struct regmap *map, uint offset, uint *valp)
348{
349 return regmap_raw_read(map, offset, valp, REGMAP_SIZE_32);
350}
351
352static inline void __write_8(u8 *addr, const u8 *val,
353 enum regmap_endianness_t endianness)
354{
355 writeb(*val, addr);
356}
357
358static inline void __write_16(u16 *addr, const u16 *val,
359 enum regmap_endianness_t endianness)
360{
361 switch (endianness) {
362 case REGMAP_NATIVE_ENDIAN:
363 writew(*val, addr);
364 break;
365 case REGMAP_LITTLE_ENDIAN:
366 out_le16(addr, *val);
367 break;
368 case REGMAP_BIG_ENDIAN:
369 out_be16(addr, *val);
370 break;
371 }
372}
373
374static inline void __write_32(u32 *addr, const u32 *val,
375 enum regmap_endianness_t endianness)
376{
377 switch (endianness) {
378 case REGMAP_NATIVE_ENDIAN:
379 writel(*val, addr);
380 break;
381 case REGMAP_LITTLE_ENDIAN:
382 out_le32(addr, *val);
383 break;
384 case REGMAP_BIG_ENDIAN:
385 out_be32(addr, *val);
386 break;
387 }
388}
389
390#if defined(out_le64) && defined(out_be64) && defined(writeq)
391static inline void __write_64(u64 *addr, const u64 *val,
392 enum regmap_endianness_t endianness)
393{
394 switch (endianness) {
395 case REGMAP_NATIVE_ENDIAN:
396 writeq(*val, addr);
397 break;
398 case REGMAP_LITTLE_ENDIAN:
399 out_le64(addr, *val);
400 break;
401 case REGMAP_BIG_ENDIAN:
402 out_be64(addr, *val);
403 break;
404 }
405}
406#endif
407
408int regmap_raw_write_range(struct regmap *map, uint range_num, uint offset,
409 const void *val, size_t val_len)
410{
411 struct regmap_range *range;
412 void *ptr;
413
414 if (range_num >= map->range_count) {
415 debug("%s: range index %d larger than range count\n",
416 __func__, range_num);
417 return -ERANGE;
418 }
419 range = &map->ranges[range_num];
420
421 ptr = map_physmem(range->start + offset, val_len, MAP_NOCACHE);
422
423 if (offset + val_len > range->size) {
424 debug("%s: offset/size combination invalid\n", __func__);
425 return -ERANGE;
426 }
427
428 switch (val_len) {
429 case REGMAP_SIZE_8:
430 __write_8(ptr, val, map->endianness);
431 break;
432 case REGMAP_SIZE_16:
433 __write_16(ptr, val, map->endianness);
434 break;
435 case REGMAP_SIZE_32:
436 __write_32(ptr, val, map->endianness);
437 break;
438#if defined(out_le64) && defined(out_be64) && defined(writeq)
439 case REGMAP_SIZE_64:
440 __write_64(ptr, val, map->endianness);
441 break;
442#endif
443 default:
444 debug("%s: regmap size %zu unknown\n", __func__, val_len);
445 return -EINVAL;
446 }
447
448 return 0;
449}
450
451int regmap_raw_write(struct regmap *map, uint offset, const void *val,
452 size_t val_len)
453{
454 return regmap_raw_write_range(map, 0, offset, val, val_len);
455}
456
457int regmap_write(struct regmap *map, uint offset, uint val)
458{
459 return regmap_raw_write(map, offset, &val, REGMAP_SIZE_32);
460}
461
462int regmap_update_bits(struct regmap *map, uint offset, uint mask, uint val)
463{
464 uint reg;
465 int ret;
466
467 ret = regmap_read(map, offset, ®);
468 if (ret)
469 return ret;
470
471 reg &= ~mask;
472
473 return regmap_write(map, offset, reg | (val & mask));
474}
475
