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