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5b9ca526 BH |
1 | /* |
2 | * | |
3 | * FIXME: Properly make this race free with refcounting etc... | |
4 | * | |
5 | * FIXME: LOCKING !!! | |
6 | */ | |
7 | ||
5b9ca526 BH |
8 | #include <linux/init.h> |
9 | #include <linux/delay.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/module.h> | |
78b86e57 | 13 | #include <linux/mutex.h> |
5b9ca526 BH |
14 | |
15 | #include <asm/semaphore.h> | |
16 | #include <asm/prom.h> | |
17 | #include <asm/pmac_pfunc.h> | |
18 | ||
19 | /* Debug */ | |
20 | #define LOG_PARSE(fmt...) | |
21 | #define LOG_ERROR(fmt...) printk(fmt) | |
22 | #define LOG_BLOB(t,b,c) | |
76a0ee3d PM |
23 | |
24 | #undef DEBUG | |
25 | #ifdef DEBUG | |
5b9ca526 | 26 | #define DBG(fmt...) printk(fmt) |
76a0ee3d PM |
27 | #else |
28 | #define DBG(fmt...) | |
29 | #endif | |
5b9ca526 BH |
30 | |
31 | /* Command numbers */ | |
32 | #define PMF_CMD_LIST 0 | |
33 | #define PMF_CMD_WRITE_GPIO 1 | |
34 | #define PMF_CMD_READ_GPIO 2 | |
35 | #define PMF_CMD_WRITE_REG32 3 | |
36 | #define PMF_CMD_READ_REG32 4 | |
37 | #define PMF_CMD_WRITE_REG16 5 | |
38 | #define PMF_CMD_READ_REG16 6 | |
39 | #define PMF_CMD_WRITE_REG8 7 | |
40 | #define PMF_CMD_READ_REG8 8 | |
41 | #define PMF_CMD_DELAY 9 | |
42 | #define PMF_CMD_WAIT_REG32 10 | |
43 | #define PMF_CMD_WAIT_REG16 11 | |
44 | #define PMF_CMD_WAIT_REG8 12 | |
45 | #define PMF_CMD_READ_I2C 13 | |
46 | #define PMF_CMD_WRITE_I2C 14 | |
47 | #define PMF_CMD_RMW_I2C 15 | |
48 | #define PMF_CMD_GEN_I2C 16 | |
49 | #define PMF_CMD_SHIFT_BYTES_RIGHT 17 | |
50 | #define PMF_CMD_SHIFT_BYTES_LEFT 18 | |
51 | #define PMF_CMD_READ_CFG 19 | |
52 | #define PMF_CMD_WRITE_CFG 20 | |
53 | #define PMF_CMD_RMW_CFG 21 | |
54 | #define PMF_CMD_READ_I2C_SUBADDR 22 | |
55 | #define PMF_CMD_WRITE_I2C_SUBADDR 23 | |
56 | #define PMF_CMD_SET_I2C_MODE 24 | |
57 | #define PMF_CMD_RMW_I2C_SUBADDR 25 | |
58 | #define PMF_CMD_READ_REG32_MASK_SHR_XOR 26 | |
59 | #define PMF_CMD_READ_REG16_MASK_SHR_XOR 27 | |
60 | #define PMF_CMD_READ_REG8_MASK_SHR_XOR 28 | |
61 | #define PMF_CMD_WRITE_REG32_SHL_MASK 29 | |
62 | #define PMF_CMD_WRITE_REG16_SHL_MASK 30 | |
63 | #define PMF_CMD_WRITE_REG8_SHL_MASK 31 | |
64 | #define PMF_CMD_MASK_AND_COMPARE 32 | |
65 | #define PMF_CMD_COUNT 33 | |
66 | ||
67 | /* This structure holds the state of the parser while walking through | |
68 | * a function definition | |
69 | */ | |
70 | struct pmf_cmd { | |
71 | const void *cmdptr; | |
72 | const void *cmdend; | |
73 | struct pmf_function *func; | |
74 | void *instdata; | |
75 | struct pmf_args *args; | |
76 | int error; | |
77 | }; | |
78 | ||
79 | #if 0 | |
80 | /* Debug output */ | |
81 | static void print_blob(const char *title, const void *blob, int bytes) | |
82 | { | |
83 | printk("%s", title); | |
84 | while(bytes--) { | |
85 | printk("%02x ", *((u8 *)blob)); | |
86 | blob += 1; | |
87 | } | |
88 | printk("\n"); | |
89 | } | |
90 | #endif | |
91 | ||
92 | /* | |
93 | * Parser helpers | |
94 | */ | |
95 | ||
96 | static u32 pmf_next32(struct pmf_cmd *cmd) | |
97 | { | |
98 | u32 value; | |
99 | if ((cmd->cmdend - cmd->cmdptr) < 4) { | |
100 | cmd->error = 1; | |
101 | return 0; | |
102 | } | |
103 | value = *((u32 *)cmd->cmdptr); | |
104 | cmd->cmdptr += 4; | |
105 | return value; | |
106 | } | |
107 | ||
108 | static const void* pmf_next_blob(struct pmf_cmd *cmd, int count) | |
109 | { | |
110 | const void *value; | |
111 | if ((cmd->cmdend - cmd->cmdptr) < count) { | |
112 | cmd->error = 1; | |
113 | return NULL; | |
114 | } | |
115 | value = cmd->cmdptr; | |
116 | cmd->cmdptr += count; | |
117 | return value; | |
118 | } | |
119 | ||
120 | /* | |
121 | * Individual command parsers | |
122 | */ | |
123 | ||
124 | #define PMF_PARSE_CALL(name, cmd, handlers, p...) \ | |
125 | do { \ | |
126 | if (cmd->error) \ | |
127 | return -ENXIO; \ | |
128 | if (handlers == NULL) \ | |
129 | return 0; \ | |
130 | if (handlers->name) \ | |
131 | return handlers->name(cmd->func, cmd->instdata, \ | |
132 | cmd->args, p); \ | |
133 | return -1; \ | |
134 | } while(0) \ | |
135 | ||
136 | ||
137 | static int pmf_parser_write_gpio(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
138 | { | |
139 | u8 value = (u8)pmf_next32(cmd); | |
140 | u8 mask = (u8)pmf_next32(cmd); | |
141 | ||
142 | LOG_PARSE("pmf: write_gpio(value: %02x, mask: %02x)\n", value, mask); | |
143 | ||
144 | PMF_PARSE_CALL(write_gpio, cmd, h, value, mask); | |
145 | } | |
146 | ||
147 | static int pmf_parser_read_gpio(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
148 | { | |
149 | u8 mask = (u8)pmf_next32(cmd); | |
150 | int rshift = (int)pmf_next32(cmd); | |
151 | u8 xor = (u8)pmf_next32(cmd); | |
152 | ||
153 | LOG_PARSE("pmf: read_gpio(mask: %02x, rshift: %d, xor: %02x)\n", | |
154 | mask, rshift, xor); | |
155 | ||
156 | PMF_PARSE_CALL(read_gpio, cmd, h, mask, rshift, xor); | |
157 | } | |
158 | ||
159 | static int pmf_parser_write_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
160 | { | |
161 | u32 offset = pmf_next32(cmd); | |
162 | u32 value = pmf_next32(cmd); | |
163 | u32 mask = pmf_next32(cmd); | |
164 | ||
165 | LOG_PARSE("pmf: write_reg32(offset: %08x, value: %08x, mask: %08x)\n", | |
166 | offset, value, mask); | |
167 | ||
168 | PMF_PARSE_CALL(write_reg32, cmd, h, offset, value, mask); | |
169 | } | |
170 | ||
171 | static int pmf_parser_read_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
172 | { | |
173 | u32 offset = pmf_next32(cmd); | |
174 | ||
175 | LOG_PARSE("pmf: read_reg32(offset: %08x)\n", offset); | |
176 | ||
177 | PMF_PARSE_CALL(read_reg32, cmd, h, offset); | |
178 | } | |
179 | ||
180 | ||
181 | static int pmf_parser_write_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
182 | { | |
183 | u32 offset = pmf_next32(cmd); | |
184 | u16 value = (u16)pmf_next32(cmd); | |
185 | u16 mask = (u16)pmf_next32(cmd); | |
186 | ||
187 | LOG_PARSE("pmf: write_reg16(offset: %08x, value: %04x, mask: %04x)\n", | |
188 | offset, value, mask); | |
189 | ||
190 | PMF_PARSE_CALL(write_reg16, cmd, h, offset, value, mask); | |
191 | } | |
192 | ||
193 | static int pmf_parser_read_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
194 | { | |
195 | u32 offset = pmf_next32(cmd); | |
196 | ||
197 | LOG_PARSE("pmf: read_reg16(offset: %08x)\n", offset); | |
198 | ||
199 | PMF_PARSE_CALL(read_reg16, cmd, h, offset); | |
200 | } | |
201 | ||
202 | ||
203 | static int pmf_parser_write_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
204 | { | |
205 | u32 offset = pmf_next32(cmd); | |
206 | u8 value = (u16)pmf_next32(cmd); | |
207 | u8 mask = (u16)pmf_next32(cmd); | |
208 | ||
209 | LOG_PARSE("pmf: write_reg8(offset: %08x, value: %02x, mask: %02x)\n", | |
210 | offset, value, mask); | |
211 | ||
212 | PMF_PARSE_CALL(write_reg8, cmd, h, offset, value, mask); | |
213 | } | |
214 | ||
215 | static int pmf_parser_read_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
216 | { | |
217 | u32 offset = pmf_next32(cmd); | |
218 | ||
219 | LOG_PARSE("pmf: read_reg8(offset: %08x)\n", offset); | |
220 | ||
221 | PMF_PARSE_CALL(read_reg8, cmd, h, offset); | |
222 | } | |
223 | ||
224 | static int pmf_parser_delay(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
225 | { | |
226 | u32 duration = pmf_next32(cmd); | |
227 | ||
228 | LOG_PARSE("pmf: delay(duration: %d us)\n", duration); | |
229 | ||
230 | PMF_PARSE_CALL(delay, cmd, h, duration); | |
231 | } | |
232 | ||
233 | static int pmf_parser_wait_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
234 | { | |
235 | u32 offset = pmf_next32(cmd); | |
236 | u32 value = pmf_next32(cmd); | |
237 | u32 mask = pmf_next32(cmd); | |
238 | ||
239 | LOG_PARSE("pmf: wait_reg32(offset: %08x, comp_value: %08x,mask: %08x)\n", | |
240 | offset, value, mask); | |
241 | ||
242 | PMF_PARSE_CALL(wait_reg32, cmd, h, offset, value, mask); | |
243 | } | |
244 | ||
245 | static int pmf_parser_wait_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
246 | { | |
247 | u32 offset = pmf_next32(cmd); | |
248 | u16 value = (u16)pmf_next32(cmd); | |
249 | u16 mask = (u16)pmf_next32(cmd); | |
250 | ||
251 | LOG_PARSE("pmf: wait_reg16(offset: %08x, comp_value: %04x,mask: %04x)\n", | |
252 | offset, value, mask); | |
253 | ||
254 | PMF_PARSE_CALL(wait_reg16, cmd, h, offset, value, mask); | |
255 | } | |
256 | ||
257 | static int pmf_parser_wait_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
258 | { | |
259 | u32 offset = pmf_next32(cmd); | |
260 | u8 value = (u8)pmf_next32(cmd); | |
261 | u8 mask = (u8)pmf_next32(cmd); | |
262 | ||
263 | LOG_PARSE("pmf: wait_reg8(offset: %08x, comp_value: %02x,mask: %02x)\n", | |
264 | offset, value, mask); | |
265 | ||
266 | PMF_PARSE_CALL(wait_reg8, cmd, h, offset, value, mask); | |
267 | } | |
268 | ||
269 | static int pmf_parser_read_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
270 | { | |
271 | u32 bytes = pmf_next32(cmd); | |
272 | ||
273 | LOG_PARSE("pmf: read_i2c(bytes: %ud)\n", bytes); | |
274 | ||
275 | PMF_PARSE_CALL(read_i2c, cmd, h, bytes); | |
276 | } | |
277 | ||
278 | static int pmf_parser_write_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
279 | { | |
280 | u32 bytes = pmf_next32(cmd); | |
281 | const void *blob = pmf_next_blob(cmd, bytes); | |
282 | ||
283 | LOG_PARSE("pmf: write_i2c(bytes: %ud) ...\n", bytes); | |
284 | LOG_BLOB("pmf: data: \n", blob, bytes); | |
285 | ||
286 | PMF_PARSE_CALL(write_i2c, cmd, h, bytes, blob); | |
287 | } | |
288 | ||
289 | ||
290 | static int pmf_parser_rmw_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
291 | { | |
292 | u32 maskbytes = pmf_next32(cmd); | |
293 | u32 valuesbytes = pmf_next32(cmd); | |
294 | u32 totalbytes = pmf_next32(cmd); | |
295 | const void *maskblob = pmf_next_blob(cmd, maskbytes); | |
296 | const void *valuesblob = pmf_next_blob(cmd, valuesbytes); | |
297 | ||
298 | LOG_PARSE("pmf: rmw_i2c(maskbytes: %ud, valuebytes: %ud, " | |
299 | "totalbytes: %d) ...\n", | |
300 | maskbytes, valuesbytes, totalbytes); | |
301 | LOG_BLOB("pmf: mask data: \n", maskblob, maskbytes); | |
302 | LOG_BLOB("pmf: values data: \n", valuesblob, valuesbytes); | |
303 | ||
304 | PMF_PARSE_CALL(rmw_i2c, cmd, h, maskbytes, valuesbytes, totalbytes, | |
305 | maskblob, valuesblob); | |
306 | } | |
307 | ||
308 | static int pmf_parser_read_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
309 | { | |
310 | u32 offset = pmf_next32(cmd); | |
311 | u32 bytes = pmf_next32(cmd); | |
312 | ||
313 | LOG_PARSE("pmf: read_cfg(offset: %x, bytes: %ud)\n", offset, bytes); | |
314 | ||
315 | PMF_PARSE_CALL(read_cfg, cmd, h, offset, bytes); | |
316 | } | |
317 | ||
318 | ||
319 | static int pmf_parser_write_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
320 | { | |
321 | u32 offset = pmf_next32(cmd); | |
322 | u32 bytes = pmf_next32(cmd); | |
323 | const void *blob = pmf_next_blob(cmd, bytes); | |
324 | ||
325 | LOG_PARSE("pmf: write_cfg(offset: %x, bytes: %ud)\n", offset, bytes); | |
326 | LOG_BLOB("pmf: data: \n", blob, bytes); | |
327 | ||
328 | PMF_PARSE_CALL(write_cfg, cmd, h, offset, bytes, blob); | |
329 | } | |
330 | ||
331 | static int pmf_parser_rmw_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
332 | { | |
333 | u32 offset = pmf_next32(cmd); | |
334 | u32 maskbytes = pmf_next32(cmd); | |
335 | u32 valuesbytes = pmf_next32(cmd); | |
336 | u32 totalbytes = pmf_next32(cmd); | |
337 | const void *maskblob = pmf_next_blob(cmd, maskbytes); | |
338 | const void *valuesblob = pmf_next_blob(cmd, valuesbytes); | |
339 | ||
340 | LOG_PARSE("pmf: rmw_cfg(maskbytes: %ud, valuebytes: %ud," | |
341 | " totalbytes: %d) ...\n", | |
342 | maskbytes, valuesbytes, totalbytes); | |
343 | LOG_BLOB("pmf: mask data: \n", maskblob, maskbytes); | |
344 | LOG_BLOB("pmf: values data: \n", valuesblob, valuesbytes); | |
345 | ||
346 | PMF_PARSE_CALL(rmw_cfg, cmd, h, offset, maskbytes, valuesbytes, | |
347 | totalbytes, maskblob, valuesblob); | |
348 | } | |
349 | ||
350 | ||
351 | static int pmf_parser_read_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
352 | { | |
353 | u8 subaddr = (u8)pmf_next32(cmd); | |
354 | u32 bytes = pmf_next32(cmd); | |
355 | ||
356 | LOG_PARSE("pmf: read_i2c_sub(subaddr: %x, bytes: %ud)\n", | |
357 | subaddr, bytes); | |
358 | ||
359 | PMF_PARSE_CALL(read_i2c_sub, cmd, h, subaddr, bytes); | |
360 | } | |
361 | ||
362 | static int pmf_parser_write_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
363 | { | |
364 | u8 subaddr = (u8)pmf_next32(cmd); | |
365 | u32 bytes = pmf_next32(cmd); | |
366 | const void *blob = pmf_next_blob(cmd, bytes); | |
367 | ||
368 | LOG_PARSE("pmf: write_i2c_sub(subaddr: %x, bytes: %ud) ...\n", | |
369 | subaddr, bytes); | |
370 | LOG_BLOB("pmf: data: \n", blob, bytes); | |
371 | ||
372 | PMF_PARSE_CALL(write_i2c_sub, cmd, h, subaddr, bytes, blob); | |
373 | } | |
374 | ||
375 | static int pmf_parser_set_i2c_mode(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
376 | { | |
377 | u32 mode = pmf_next32(cmd); | |
378 | ||
379 | LOG_PARSE("pmf: set_i2c_mode(mode: %d)\n", mode); | |
380 | ||
381 | PMF_PARSE_CALL(set_i2c_mode, cmd, h, mode); | |
382 | } | |
383 | ||
384 | ||
385 | static int pmf_parser_rmw_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h) | |
386 | { | |
387 | u8 subaddr = (u8)pmf_next32(cmd); | |
388 | u32 maskbytes = pmf_next32(cmd); | |
389 | u32 valuesbytes = pmf_next32(cmd); | |
390 | u32 totalbytes = pmf_next32(cmd); | |
391 | const void *maskblob = pmf_next_blob(cmd, maskbytes); | |
392 | const void *valuesblob = pmf_next_blob(cmd, valuesbytes); | |
393 | ||
394 | LOG_PARSE("pmf: rmw_i2c_sub(subaddr: %x, maskbytes: %ud, valuebytes: %ud" | |
395 | ", totalbytes: %d) ...\n", | |
396 | subaddr, maskbytes, valuesbytes, totalbytes); | |
397 | LOG_BLOB("pmf: mask data: \n", maskblob, maskbytes); | |
398 | LOG_BLOB("pmf: values data: \n", valuesblob, valuesbytes); | |
399 | ||
400 | PMF_PARSE_CALL(rmw_i2c_sub, cmd, h, subaddr, maskbytes, valuesbytes, | |
401 | totalbytes, maskblob, valuesblob); | |
402 | } | |
403 | ||
404 | static int pmf_parser_read_reg32_msrx(struct pmf_cmd *cmd, | |
405 | struct pmf_handlers *h) | |
406 | { | |
407 | u32 offset = pmf_next32(cmd); | |
408 | u32 mask = pmf_next32(cmd); | |
409 | u32 shift = pmf_next32(cmd); | |
410 | u32 xor = pmf_next32(cmd); | |
411 | ||
412 | LOG_PARSE("pmf: read_reg32_msrx(offset: %x, mask: %x, shift: %x," | |
413 | " xor: %x\n", offset, mask, shift, xor); | |
414 | ||
415 | PMF_PARSE_CALL(read_reg32_msrx, cmd, h, offset, mask, shift, xor); | |
416 | } | |
417 | ||
418 | static int pmf_parser_read_reg16_msrx(struct pmf_cmd *cmd, | |
419 | struct pmf_handlers *h) | |
420 | { | |
421 | u32 offset = pmf_next32(cmd); | |
422 | u32 mask = pmf_next32(cmd); | |
423 | u32 shift = pmf_next32(cmd); | |
424 | u32 xor = pmf_next32(cmd); | |
425 | ||
426 | LOG_PARSE("pmf: read_reg16_msrx(offset: %x, mask: %x, shift: %x," | |
427 | " xor: %x\n", offset, mask, shift, xor); | |
428 | ||
429 | PMF_PARSE_CALL(read_reg16_msrx, cmd, h, offset, mask, shift, xor); | |
430 | } | |
431 | static int pmf_parser_read_reg8_msrx(struct pmf_cmd *cmd, | |
432 | struct pmf_handlers *h) | |
433 | { | |
434 | u32 offset = pmf_next32(cmd); | |
435 | u32 mask = pmf_next32(cmd); | |
436 | u32 shift = pmf_next32(cmd); | |
437 | u32 xor = pmf_next32(cmd); | |
438 | ||
439 | LOG_PARSE("pmf: read_reg8_msrx(offset: %x, mask: %x, shift: %x," | |
440 | " xor: %x\n", offset, mask, shift, xor); | |
441 | ||
442 | PMF_PARSE_CALL(read_reg8_msrx, cmd, h, offset, mask, shift, xor); | |
443 | } | |
444 | ||
445 | static int pmf_parser_write_reg32_slm(struct pmf_cmd *cmd, | |
446 | struct pmf_handlers *h) | |
447 | { | |
448 | u32 offset = pmf_next32(cmd); | |
449 | u32 shift = pmf_next32(cmd); | |
450 | u32 mask = pmf_next32(cmd); | |
451 | ||
452 | LOG_PARSE("pmf: write_reg32_slm(offset: %x, shift: %x, mask: %x\n", | |
453 | offset, shift, mask); | |
454 | ||
455 | PMF_PARSE_CALL(write_reg32_slm, cmd, h, offset, shift, mask); | |
456 | } | |
457 | ||
458 | static int pmf_parser_write_reg16_slm(struct pmf_cmd *cmd, | |
459 | struct pmf_handlers *h) | |
460 | { | |
461 | u32 offset = pmf_next32(cmd); | |
462 | u32 shift = pmf_next32(cmd); | |
463 | u32 mask = pmf_next32(cmd); | |
464 | ||
465 | LOG_PARSE("pmf: write_reg16_slm(offset: %x, shift: %x, mask: %x\n", | |
466 | offset, shift, mask); | |
467 | ||
468 | PMF_PARSE_CALL(write_reg16_slm, cmd, h, offset, shift, mask); | |
469 | } | |
470 | ||
471 | static int pmf_parser_write_reg8_slm(struct pmf_cmd *cmd, | |
472 | struct pmf_handlers *h) | |
473 | { | |
474 | u32 offset = pmf_next32(cmd); | |
475 | u32 shift = pmf_next32(cmd); | |
476 | u32 mask = pmf_next32(cmd); | |
477 | ||
478 | LOG_PARSE("pmf: write_reg8_slm(offset: %x, shift: %x, mask: %x\n", | |
479 | offset, shift, mask); | |
480 | ||
481 | PMF_PARSE_CALL(write_reg8_slm, cmd, h, offset, shift, mask); | |
482 | } | |
483 | ||
484 | static int pmf_parser_mask_and_compare(struct pmf_cmd *cmd, | |
485 | struct pmf_handlers *h) | |
486 | { | |
487 | u32 bytes = pmf_next32(cmd); | |
488 | const void *maskblob = pmf_next_blob(cmd, bytes); | |
489 | const void *valuesblob = pmf_next_blob(cmd, bytes); | |
490 | ||
491 | LOG_PARSE("pmf: mask_and_compare(length: %ud ...\n", bytes); | |
492 | LOG_BLOB("pmf: mask data: \n", maskblob, bytes); | |
493 | LOG_BLOB("pmf: values data: \n", valuesblob, bytes); | |
494 | ||
495 | PMF_PARSE_CALL(mask_and_compare, cmd, h, | |
496 | bytes, maskblob, valuesblob); | |
497 | } | |
498 | ||
499 | ||
500 | typedef int (*pmf_cmd_parser_t)(struct pmf_cmd *cmd, struct pmf_handlers *h); | |
501 | ||
502 | static pmf_cmd_parser_t pmf_parsers[PMF_CMD_COUNT] = | |
503 | { | |
504 | NULL, | |
505 | pmf_parser_write_gpio, | |
506 | pmf_parser_read_gpio, | |
507 | pmf_parser_write_reg32, | |
508 | pmf_parser_read_reg32, | |
509 | pmf_parser_write_reg16, | |
510 | pmf_parser_read_reg16, | |
511 | pmf_parser_write_reg8, | |
512 | pmf_parser_read_reg8, | |
513 | pmf_parser_delay, | |
514 | pmf_parser_wait_reg32, | |
515 | pmf_parser_wait_reg16, | |
516 | pmf_parser_wait_reg8, | |
517 | pmf_parser_read_i2c, | |
518 | pmf_parser_write_i2c, | |
519 | pmf_parser_rmw_i2c, | |
520 | NULL, /* Bogus command */ | |
521 | NULL, /* Shift bytes right: NYI */ | |
522 | NULL, /* Shift bytes left: NYI */ | |
523 | pmf_parser_read_cfg, | |
524 | pmf_parser_write_cfg, | |
525 | pmf_parser_rmw_cfg, | |
526 | pmf_parser_read_i2c_sub, | |
527 | pmf_parser_write_i2c_sub, | |
528 | pmf_parser_set_i2c_mode, | |
529 | pmf_parser_rmw_i2c_sub, | |
530 | pmf_parser_read_reg32_msrx, | |
531 | pmf_parser_read_reg16_msrx, | |
532 | pmf_parser_read_reg8_msrx, | |
533 | pmf_parser_write_reg32_slm, | |
534 | pmf_parser_write_reg16_slm, | |
535 | pmf_parser_write_reg8_slm, | |
536 | pmf_parser_mask_and_compare, | |
537 | }; | |
538 | ||
539 | struct pmf_device { | |
540 | struct list_head link; | |
541 | struct device_node *node; | |
542 | struct pmf_handlers *handlers; | |
543 | struct list_head functions; | |
544 | struct kref ref; | |
545 | }; | |
546 | ||
547 | static LIST_HEAD(pmf_devices); | |
34af946a | 548 | static DEFINE_SPINLOCK(pmf_lock); |
78b86e57 | 549 | static DEFINE_MUTEX(pmf_irq_mutex); |
5b9ca526 BH |
550 | |
551 | static void pmf_release_device(struct kref *kref) | |
552 | { | |
553 | struct pmf_device *dev = container_of(kref, struct pmf_device, ref); | |
554 | kfree(dev); | |
555 | } | |
556 | ||
557 | static inline void pmf_put_device(struct pmf_device *dev) | |
558 | { | |
559 | kref_put(&dev->ref, pmf_release_device); | |
560 | } | |
561 | ||
562 | static inline struct pmf_device *pmf_get_device(struct pmf_device *dev) | |
563 | { | |
564 | kref_get(&dev->ref); | |
565 | return dev; | |
566 | } | |
567 | ||
568 | static inline struct pmf_device *pmf_find_device(struct device_node *np) | |
569 | { | |
570 | struct pmf_device *dev; | |
571 | ||
572 | list_for_each_entry(dev, &pmf_devices, link) { | |
573 | if (dev->node == np) | |
574 | return pmf_get_device(dev); | |
575 | } | |
576 | return NULL; | |
577 | } | |
578 | ||
579 | static int pmf_parse_one(struct pmf_function *func, | |
580 | struct pmf_handlers *handlers, | |
581 | void *instdata, struct pmf_args *args) | |
582 | { | |
583 | struct pmf_cmd cmd; | |
584 | u32 ccode; | |
585 | int count, rc; | |
586 | ||
587 | cmd.cmdptr = func->data; | |
588 | cmd.cmdend = func->data + func->length; | |
589 | cmd.func = func; | |
590 | cmd.instdata = instdata; | |
591 | cmd.args = args; | |
592 | cmd.error = 0; | |
593 | ||
594 | LOG_PARSE("pmf: func %s, %d bytes, %s...\n", | |
595 | func->name, func->length, | |
596 | handlers ? "executing" : "parsing"); | |
597 | ||
598 | /* One subcommand to parse for now */ | |
599 | count = 1; | |
600 | ||
601 | while(count-- && cmd.cmdptr < cmd.cmdend) { | |
602 | /* Get opcode */ | |
603 | ccode = pmf_next32(&cmd); | |
604 | /* Check if we are hitting a command list, fetch new count */ | |
605 | if (ccode == 0) { | |
606 | count = pmf_next32(&cmd) - 1; | |
607 | ccode = pmf_next32(&cmd); | |
608 | } | |
609 | if (cmd.error) { | |
610 | LOG_ERROR("pmf: parse error, not enough data\n"); | |
611 | return -ENXIO; | |
612 | } | |
613 | if (ccode >= PMF_CMD_COUNT) { | |
614 | LOG_ERROR("pmf: command code %d unknown !\n", ccode); | |
615 | return -ENXIO; | |
616 | } | |
617 | if (pmf_parsers[ccode] == NULL) { | |
618 | LOG_ERROR("pmf: no parser for command %d !\n", ccode); | |
619 | return -ENXIO; | |
620 | } | |
621 | rc = pmf_parsers[ccode](&cmd, handlers); | |
622 | if (rc != 0) { | |
623 | LOG_ERROR("pmf: parser for command %d returned" | |
624 | " error %d\n", ccode, rc); | |
625 | return rc; | |
626 | } | |
627 | } | |
628 | ||
629 | /* We are doing an initial parse pass, we need to adjust the size */ | |
630 | if (handlers == NULL) | |
631 | func->length = cmd.cmdptr - func->data; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int pmf_add_function_prop(struct pmf_device *dev, void *driverdata, | |
637 | const char *name, u32 *data, | |
638 | unsigned int length) | |
639 | { | |
640 | int count = 0; | |
641 | struct pmf_function *func = NULL; | |
642 | ||
643 | DBG("pmf: Adding functions for platform-do-%s\n", name); | |
644 | ||
645 | while (length >= 12) { | |
646 | /* Allocate a structure */ | |
647 | func = kzalloc(sizeof(struct pmf_function), GFP_KERNEL); | |
648 | if (func == NULL) | |
649 | goto bail; | |
650 | kref_init(&func->ref); | |
651 | INIT_LIST_HEAD(&func->irq_clients); | |
652 | func->node = dev->node; | |
653 | func->driver_data = driverdata; | |
654 | func->name = name; | |
655 | func->phandle = data[0]; | |
656 | func->flags = data[1]; | |
657 | data += 2; | |
658 | length -= 8; | |
659 | func->data = data; | |
660 | func->length = length; | |
661 | func->dev = dev; | |
662 | DBG("pmf: idx %d: flags=%08x, phandle=%08x " | |
663 | " %d bytes remaining, parsing...\n", | |
664 | count+1, func->flags, func->phandle, length); | |
665 | if (pmf_parse_one(func, NULL, NULL, NULL)) { | |
666 | kfree(func); | |
667 | goto bail; | |
668 | } | |
669 | length -= func->length; | |
670 | data = (u32 *)(((u8 *)data) + func->length); | |
671 | list_add(&func->link, &dev->functions); | |
672 | pmf_get_device(dev); | |
673 | count++; | |
674 | } | |
675 | bail: | |
676 | DBG("pmf: Added %d functions\n", count); | |
677 | ||
678 | return count; | |
679 | } | |
680 | ||
681 | static int pmf_add_functions(struct pmf_device *dev, void *driverdata) | |
682 | { | |
683 | struct property *pp; | |
684 | #define PP_PREFIX "platform-do-" | |
685 | const int plen = strlen(PP_PREFIX); | |
686 | int count = 0; | |
687 | ||
688 | for (pp = dev->node->properties; pp != 0; pp = pp->next) { | |
689 | char *name; | |
690 | if (strncmp(pp->name, PP_PREFIX, plen) != 0) | |
691 | continue; | |
692 | name = pp->name + plen; | |
693 | if (strlen(name) && pp->length >= 12) | |
694 | count += pmf_add_function_prop(dev, driverdata, name, | |
695 | (u32 *)pp->value, | |
696 | pp->length); | |
697 | } | |
698 | return count; | |
699 | } | |
700 | ||
701 | ||
702 | int pmf_register_driver(struct device_node *np, | |
703 | struct pmf_handlers *handlers, | |
704 | void *driverdata) | |
705 | { | |
706 | struct pmf_device *dev; | |
707 | unsigned long flags; | |
708 | int rc = 0; | |
709 | ||
710 | if (handlers == NULL) | |
711 | return -EINVAL; | |
712 | ||
713 | DBG("pmf: registering driver for node %s\n", np->full_name); | |
714 | ||
715 | spin_lock_irqsave(&pmf_lock, flags); | |
716 | dev = pmf_find_device(np); | |
717 | spin_unlock_irqrestore(&pmf_lock, flags); | |
718 | if (dev != NULL) { | |
719 | DBG("pmf: already there !\n"); | |
720 | pmf_put_device(dev); | |
721 | return -EBUSY; | |
722 | } | |
723 | ||
724 | dev = kzalloc(sizeof(struct pmf_device), GFP_KERNEL); | |
725 | if (dev == NULL) { | |
726 | DBG("pmf: no memory !\n"); | |
727 | return -ENOMEM; | |
728 | } | |
729 | kref_init(&dev->ref); | |
730 | dev->node = of_node_get(np); | |
731 | dev->handlers = handlers; | |
732 | INIT_LIST_HEAD(&dev->functions); | |
733 | ||
734 | rc = pmf_add_functions(dev, driverdata); | |
735 | if (rc == 0) { | |
736 | DBG("pmf: no functions, disposing.. \n"); | |
737 | of_node_put(np); | |
738 | kfree(dev); | |
739 | return -ENODEV; | |
740 | } | |
741 | ||
742 | spin_lock_irqsave(&pmf_lock, flags); | |
743 | list_add(&dev->link, &pmf_devices); | |
744 | spin_unlock_irqrestore(&pmf_lock, flags); | |
745 | ||
746 | return 0; | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(pmf_register_driver); | |
749 | ||
750 | struct pmf_function *pmf_get_function(struct pmf_function *func) | |
751 | { | |
752 | if (!try_module_get(func->dev->handlers->owner)) | |
753 | return NULL; | |
754 | kref_get(&func->ref); | |
755 | return func; | |
756 | } | |
757 | EXPORT_SYMBOL_GPL(pmf_get_function); | |
758 | ||
759 | static void pmf_release_function(struct kref *kref) | |
760 | { | |
761 | struct pmf_function *func = | |
762 | container_of(kref, struct pmf_function, ref); | |
763 | pmf_put_device(func->dev); | |
764 | kfree(func); | |
765 | } | |
766 | ||
767 | static inline void __pmf_put_function(struct pmf_function *func) | |
768 | { | |
769 | kref_put(&func->ref, pmf_release_function); | |
770 | } | |
771 | ||
772 | void pmf_put_function(struct pmf_function *func) | |
773 | { | |
774 | if (func == NULL) | |
775 | return; | |
776 | module_put(func->dev->handlers->owner); | |
777 | __pmf_put_function(func); | |
778 | } | |
779 | EXPORT_SYMBOL_GPL(pmf_put_function); | |
780 | ||
781 | void pmf_unregister_driver(struct device_node *np) | |
782 | { | |
783 | struct pmf_device *dev; | |
784 | unsigned long flags; | |
785 | ||
786 | DBG("pmf: unregistering driver for node %s\n", np->full_name); | |
787 | ||
788 | spin_lock_irqsave(&pmf_lock, flags); | |
789 | dev = pmf_find_device(np); | |
790 | if (dev == NULL) { | |
791 | DBG("pmf: not such driver !\n"); | |
792 | spin_unlock_irqrestore(&pmf_lock, flags); | |
793 | return; | |
794 | } | |
795 | list_del(&dev->link); | |
796 | ||
797 | while(!list_empty(&dev->functions)) { | |
798 | struct pmf_function *func = | |
799 | list_entry(dev->functions.next, typeof(*func), link); | |
800 | list_del(&func->link); | |
801 | __pmf_put_function(func); | |
802 | } | |
803 | ||
804 | pmf_put_device(dev); | |
805 | spin_unlock_irqrestore(&pmf_lock, flags); | |
806 | } | |
807 | EXPORT_SYMBOL_GPL(pmf_unregister_driver); | |
808 | ||
809 | struct pmf_function *__pmf_find_function(struct device_node *target, | |
810 | const char *name, u32 flags) | |
811 | { | |
812 | struct device_node *actor = of_node_get(target); | |
813 | struct pmf_device *dev; | |
814 | struct pmf_function *func, *result = NULL; | |
815 | char fname[64]; | |
018a3d1d JK |
816 | const u32 *prop; |
817 | u32 ph; | |
5b9ca526 BH |
818 | |
819 | /* | |
820 | * Look for a "platform-*" function reference. If we can't find | |
821 | * one, then we fallback to a direct call attempt | |
822 | */ | |
823 | snprintf(fname, 63, "platform-%s", name); | |
018a3d1d | 824 | prop = get_property(target, fname, NULL); |
5b9ca526 BH |
825 | if (prop == NULL) |
826 | goto find_it; | |
827 | ph = *prop; | |
828 | if (ph == 0) | |
829 | goto find_it; | |
830 | ||
831 | /* | |
832 | * Ok, now try to find the actor. If we can't find it, we fail, | |
833 | * there is no point in falling back there | |
834 | */ | |
835 | of_node_put(actor); | |
836 | actor = of_find_node_by_phandle(ph); | |
837 | if (actor == NULL) | |
838 | return NULL; | |
839 | find_it: | |
840 | dev = pmf_find_device(actor); | |
841 | if (dev == NULL) | |
842 | return NULL; | |
843 | ||
844 | list_for_each_entry(func, &dev->functions, link) { | |
845 | if (name && strcmp(name, func->name)) | |
846 | continue; | |
847 | if (func->phandle && target->node != func->phandle) | |
848 | continue; | |
849 | if ((func->flags & flags) == 0) | |
850 | continue; | |
851 | result = func; | |
852 | break; | |
853 | } | |
854 | of_node_put(actor); | |
855 | pmf_put_device(dev); | |
856 | return result; | |
857 | } | |
858 | ||
859 | ||
860 | int pmf_register_irq_client(struct device_node *target, | |
861 | const char *name, | |
862 | struct pmf_irq_client *client) | |
863 | { | |
864 | struct pmf_function *func; | |
865 | unsigned long flags; | |
866 | ||
867 | spin_lock_irqsave(&pmf_lock, flags); | |
868 | func = __pmf_find_function(target, name, PMF_FLAGS_INT_GEN); | |
78b86e57 BH |
869 | if (func) |
870 | func = pmf_get_function(func); | |
871 | spin_unlock_irqrestore(&pmf_lock, flags); | |
872 | if (func == NULL) | |
5b9ca526 | 873 | return -ENODEV; |
4312dc76 JB |
874 | |
875 | /* guard against manipulations of list */ | |
78b86e57 | 876 | mutex_lock(&pmf_irq_mutex); |
cc0fa84a BC |
877 | if (list_empty(&func->irq_clients)) |
878 | func->dev->handlers->irq_enable(func); | |
4312dc76 JB |
879 | |
880 | /* guard against pmf_do_irq while changing list */ | |
881 | spin_lock_irqsave(&pmf_lock, flags); | |
5b9ca526 | 882 | list_add(&client->link, &func->irq_clients); |
4312dc76 JB |
883 | spin_unlock_irqrestore(&pmf_lock, flags); |
884 | ||
cc0fa84a | 885 | client->func = func; |
78b86e57 | 886 | mutex_unlock(&pmf_irq_mutex); |
5b9ca526 BH |
887 | |
888 | return 0; | |
889 | } | |
890 | EXPORT_SYMBOL_GPL(pmf_register_irq_client); | |
891 | ||
cc0fa84a | 892 | void pmf_unregister_irq_client(struct pmf_irq_client *client) |
5b9ca526 | 893 | { |
cc0fa84a | 894 | struct pmf_function *func = client->func; |
4312dc76 | 895 | unsigned long flags; |
5b9ca526 | 896 | |
cc0fa84a BC |
897 | BUG_ON(func == NULL); |
898 | ||
4312dc76 | 899 | /* guard against manipulations of list */ |
78b86e57 | 900 | mutex_lock(&pmf_irq_mutex); |
cc0fa84a | 901 | client->func = NULL; |
4312dc76 JB |
902 | |
903 | /* guard against pmf_do_irq while changing list */ | |
904 | spin_lock_irqsave(&pmf_lock, flags); | |
5b9ca526 | 905 | list_del(&client->link); |
4312dc76 JB |
906 | spin_unlock_irqrestore(&pmf_lock, flags); |
907 | ||
cc0fa84a BC |
908 | if (list_empty(&func->irq_clients)) |
909 | func->dev->handlers->irq_disable(func); | |
78b86e57 BH |
910 | mutex_unlock(&pmf_irq_mutex); |
911 | pmf_put_function(func); | |
5b9ca526 BH |
912 | } |
913 | EXPORT_SYMBOL_GPL(pmf_unregister_irq_client); | |
914 | ||
915 | ||
916 | void pmf_do_irq(struct pmf_function *func) | |
917 | { | |
918 | unsigned long flags; | |
919 | struct pmf_irq_client *client; | |
920 | ||
921 | /* For now, using a spinlock over the whole function. Can be made | |
922 | * to drop the lock using 2 lists if necessary | |
923 | */ | |
924 | spin_lock_irqsave(&pmf_lock, flags); | |
925 | list_for_each_entry(client, &func->irq_clients, link) { | |
926 | if (!try_module_get(client->owner)) | |
927 | continue; | |
928 | client->handler(client->data); | |
929 | module_put(client->owner); | |
930 | } | |
931 | spin_unlock_irqrestore(&pmf_lock, flags); | |
932 | } | |
933 | EXPORT_SYMBOL_GPL(pmf_do_irq); | |
934 | ||
935 | ||
936 | int pmf_call_one(struct pmf_function *func, struct pmf_args *args) | |
937 | { | |
938 | struct pmf_device *dev = func->dev; | |
939 | void *instdata = NULL; | |
940 | int rc = 0; | |
941 | ||
942 | DBG(" ** pmf_call_one(%s/%s) **\n", dev->node->full_name, func->name); | |
943 | ||
944 | if (dev->handlers->begin) | |
945 | instdata = dev->handlers->begin(func, args); | |
946 | rc = pmf_parse_one(func, dev->handlers, instdata, args); | |
947 | if (dev->handlers->end) | |
948 | dev->handlers->end(func, instdata); | |
949 | ||
950 | return rc; | |
951 | } | |
952 | EXPORT_SYMBOL_GPL(pmf_call_one); | |
953 | ||
954 | int pmf_do_functions(struct device_node *np, const char *name, | |
955 | u32 phandle, u32 fflags, struct pmf_args *args) | |
956 | { | |
957 | struct pmf_device *dev; | |
958 | struct pmf_function *func, *tmp; | |
959 | unsigned long flags; | |
960 | int rc = -ENODEV; | |
961 | ||
962 | spin_lock_irqsave(&pmf_lock, flags); | |
963 | ||
964 | dev = pmf_find_device(np); | |
965 | if (dev == NULL) { | |
966 | spin_unlock_irqrestore(&pmf_lock, flags); | |
967 | return -ENODEV; | |
968 | } | |
969 | list_for_each_entry_safe(func, tmp, &dev->functions, link) { | |
970 | if (name && strcmp(name, func->name)) | |
971 | continue; | |
972 | if (phandle && func->phandle && phandle != func->phandle) | |
973 | continue; | |
974 | if ((func->flags & fflags) == 0) | |
975 | continue; | |
976 | if (pmf_get_function(func) == NULL) | |
977 | continue; | |
978 | spin_unlock_irqrestore(&pmf_lock, flags); | |
979 | rc = pmf_call_one(func, args); | |
980 | pmf_put_function(func); | |
981 | spin_lock_irqsave(&pmf_lock, flags); | |
982 | } | |
983 | pmf_put_device(dev); | |
984 | spin_unlock_irqrestore(&pmf_lock, flags); | |
985 | ||
986 | return rc; | |
987 | } | |
988 | EXPORT_SYMBOL_GPL(pmf_do_functions); | |
989 | ||
990 | ||
991 | struct pmf_function *pmf_find_function(struct device_node *target, | |
992 | const char *name) | |
993 | { | |
994 | struct pmf_function *func; | |
995 | unsigned long flags; | |
996 | ||
997 | spin_lock_irqsave(&pmf_lock, flags); | |
998 | func = __pmf_find_function(target, name, PMF_FLAGS_ON_DEMAND); | |
999 | if (func) | |
1000 | func = pmf_get_function(func); | |
1001 | spin_unlock_irqrestore(&pmf_lock, flags); | |
1002 | return func; | |
1003 | } | |
1004 | EXPORT_SYMBOL_GPL(pmf_find_function); | |
1005 | ||
1006 | int pmf_call_function(struct device_node *target, const char *name, | |
1007 | struct pmf_args *args) | |
1008 | { | |
1009 | struct pmf_function *func = pmf_find_function(target, name); | |
1010 | int rc; | |
1011 | ||
1012 | if (func == NULL) | |
1013 | return -ENODEV; | |
1014 | ||
1015 | rc = pmf_call_one(func, args); | |
1016 | pmf_put_function(func); | |
1017 | return rc; | |
1018 | } | |
1019 | EXPORT_SYMBOL_GPL(pmf_call_function); | |
1020 |