3 * FIXME: Properly make this race free with refcounting etc...
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>
14 #include <linux/mutex.h>
16 #include <asm/semaphore.h>
18 #include <asm/pmac_pfunc.h>
21 #define LOG_PARSE(fmt...)
22 #define LOG_ERROR(fmt...) printk(fmt)
23 #define LOG_BLOB(t,b,c)
27 #define DBG(fmt...) printk(fmt)
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
68 /* This structure holds the state of the parser while walking through
69 * a function definition
74 struct pmf_function *func;
76 struct pmf_args *args;
82 static void print_blob(const char *title, const void *blob, int bytes)
86 printk("%02x ", *((u8 *)blob));
97 static u32 pmf_next32(struct pmf_cmd *cmd)
100 if ((cmd->cmdend - cmd->cmdptr) < 4) {
104 value = *((u32 *)cmd->cmdptr);
109 static const void* pmf_next_blob(struct pmf_cmd *cmd, int count)
112 if ((cmd->cmdend - cmd->cmdptr) < count) {
117 cmd->cmdptr += count;
122 * Individual command parsers
125 #define PMF_PARSE_CALL(name, cmd, handlers, p...) \
129 if (handlers == NULL) \
131 if (handlers->name) \
132 return handlers->name(cmd->func, cmd->instdata, \
138 static int pmf_parser_write_gpio(struct pmf_cmd *cmd, struct pmf_handlers *h)
140 u8 value = (u8)pmf_next32(cmd);
141 u8 mask = (u8)pmf_next32(cmd);
143 LOG_PARSE("pmf: write_gpio(value: %02x, mask: %02x)\n", value, mask);
145 PMF_PARSE_CALL(write_gpio, cmd, h, value, mask);
148 static int pmf_parser_read_gpio(struct pmf_cmd *cmd, struct pmf_handlers *h)
150 u8 mask = (u8)pmf_next32(cmd);
151 int rshift = (int)pmf_next32(cmd);
152 u8 xor = (u8)pmf_next32(cmd);
154 LOG_PARSE("pmf: read_gpio(mask: %02x, rshift: %d, xor: %02x)\n",
157 PMF_PARSE_CALL(read_gpio, cmd, h, mask, rshift, xor);
160 static int pmf_parser_write_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h)
162 u32 offset = pmf_next32(cmd);
163 u32 value = pmf_next32(cmd);
164 u32 mask = pmf_next32(cmd);
166 LOG_PARSE("pmf: write_reg32(offset: %08x, value: %08x, mask: %08x)\n",
167 offset, value, mask);
169 PMF_PARSE_CALL(write_reg32, cmd, h, offset, value, mask);
172 static int pmf_parser_read_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h)
174 u32 offset = pmf_next32(cmd);
176 LOG_PARSE("pmf: read_reg32(offset: %08x)\n", offset);
178 PMF_PARSE_CALL(read_reg32, cmd, h, offset);
182 static int pmf_parser_write_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h)
184 u32 offset = pmf_next32(cmd);
185 u16 value = (u16)pmf_next32(cmd);
186 u16 mask = (u16)pmf_next32(cmd);
188 LOG_PARSE("pmf: write_reg16(offset: %08x, value: %04x, mask: %04x)\n",
189 offset, value, mask);
191 PMF_PARSE_CALL(write_reg16, cmd, h, offset, value, mask);
194 static int pmf_parser_read_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h)
196 u32 offset = pmf_next32(cmd);
198 LOG_PARSE("pmf: read_reg16(offset: %08x)\n", offset);
200 PMF_PARSE_CALL(read_reg16, cmd, h, offset);
204 static int pmf_parser_write_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h)
206 u32 offset = pmf_next32(cmd);
207 u8 value = (u16)pmf_next32(cmd);
208 u8 mask = (u16)pmf_next32(cmd);
210 LOG_PARSE("pmf: write_reg8(offset: %08x, value: %02x, mask: %02x)\n",
211 offset, value, mask);
213 PMF_PARSE_CALL(write_reg8, cmd, h, offset, value, mask);
216 static int pmf_parser_read_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h)
218 u32 offset = pmf_next32(cmd);
220 LOG_PARSE("pmf: read_reg8(offset: %08x)\n", offset);
222 PMF_PARSE_CALL(read_reg8, cmd, h, offset);
225 static int pmf_parser_delay(struct pmf_cmd *cmd, struct pmf_handlers *h)
227 u32 duration = pmf_next32(cmd);
229 LOG_PARSE("pmf: delay(duration: %d us)\n", duration);
231 PMF_PARSE_CALL(delay, cmd, h, duration);
234 static int pmf_parser_wait_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h)
236 u32 offset = pmf_next32(cmd);
237 u32 value = pmf_next32(cmd);
238 u32 mask = pmf_next32(cmd);
240 LOG_PARSE("pmf: wait_reg32(offset: %08x, comp_value: %08x,mask: %08x)\n",
241 offset, value, mask);
243 PMF_PARSE_CALL(wait_reg32, cmd, h, offset, value, mask);
246 static int pmf_parser_wait_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h)
248 u32 offset = pmf_next32(cmd);
249 u16 value = (u16)pmf_next32(cmd);
250 u16 mask = (u16)pmf_next32(cmd);
252 LOG_PARSE("pmf: wait_reg16(offset: %08x, comp_value: %04x,mask: %04x)\n",
253 offset, value, mask);
255 PMF_PARSE_CALL(wait_reg16, cmd, h, offset, value, mask);
258 static int pmf_parser_wait_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h)
260 u32 offset = pmf_next32(cmd);
261 u8 value = (u8)pmf_next32(cmd);
262 u8 mask = (u8)pmf_next32(cmd);
264 LOG_PARSE("pmf: wait_reg8(offset: %08x, comp_value: %02x,mask: %02x)\n",
265 offset, value, mask);
267 PMF_PARSE_CALL(wait_reg8, cmd, h, offset, value, mask);
270 static int pmf_parser_read_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h)
272 u32 bytes = pmf_next32(cmd);
274 LOG_PARSE("pmf: read_i2c(bytes: %ud)\n", bytes);
276 PMF_PARSE_CALL(read_i2c, cmd, h, bytes);
279 static int pmf_parser_write_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h)
281 u32 bytes = pmf_next32(cmd);
282 const void *blob = pmf_next_blob(cmd, bytes);
284 LOG_PARSE("pmf: write_i2c(bytes: %ud) ...\n", bytes);
285 LOG_BLOB("pmf: data: \n", blob, bytes);
287 PMF_PARSE_CALL(write_i2c, cmd, h, bytes, blob);
291 static int pmf_parser_rmw_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h)
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);
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);
305 PMF_PARSE_CALL(rmw_i2c, cmd, h, maskbytes, valuesbytes, totalbytes,
306 maskblob, valuesblob);
309 static int pmf_parser_read_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h)
311 u32 offset = pmf_next32(cmd);
312 u32 bytes = pmf_next32(cmd);
314 LOG_PARSE("pmf: read_cfg(offset: %x, bytes: %ud)\n", offset, bytes);
316 PMF_PARSE_CALL(read_cfg, cmd, h, offset, bytes);
320 static int pmf_parser_write_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h)
322 u32 offset = pmf_next32(cmd);
323 u32 bytes = pmf_next32(cmd);
324 const void *blob = pmf_next_blob(cmd, bytes);
326 LOG_PARSE("pmf: write_cfg(offset: %x, bytes: %ud)\n", offset, bytes);
327 LOG_BLOB("pmf: data: \n", blob, bytes);
329 PMF_PARSE_CALL(write_cfg, cmd, h, offset, bytes, blob);
332 static int pmf_parser_rmw_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h)
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);
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);
347 PMF_PARSE_CALL(rmw_cfg, cmd, h, offset, maskbytes, valuesbytes,
348 totalbytes, maskblob, valuesblob);
352 static int pmf_parser_read_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h)
354 u8 subaddr = (u8)pmf_next32(cmd);
355 u32 bytes = pmf_next32(cmd);
357 LOG_PARSE("pmf: read_i2c_sub(subaddr: %x, bytes: %ud)\n",
360 PMF_PARSE_CALL(read_i2c_sub, cmd, h, subaddr, bytes);
363 static int pmf_parser_write_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h)
365 u8 subaddr = (u8)pmf_next32(cmd);
366 u32 bytes = pmf_next32(cmd);
367 const void *blob = pmf_next_blob(cmd, bytes);
369 LOG_PARSE("pmf: write_i2c_sub(subaddr: %x, bytes: %ud) ...\n",
371 LOG_BLOB("pmf: data: \n", blob, bytes);
373 PMF_PARSE_CALL(write_i2c_sub, cmd, h, subaddr, bytes, blob);
376 static int pmf_parser_set_i2c_mode(struct pmf_cmd *cmd, struct pmf_handlers *h)
378 u32 mode = pmf_next32(cmd);
380 LOG_PARSE("pmf: set_i2c_mode(mode: %d)\n", mode);
382 PMF_PARSE_CALL(set_i2c_mode, cmd, h, mode);
386 static int pmf_parser_rmw_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h)
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);
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);
401 PMF_PARSE_CALL(rmw_i2c_sub, cmd, h, subaddr, maskbytes, valuesbytes,
402 totalbytes, maskblob, valuesblob);
405 static int pmf_parser_read_reg32_msrx(struct pmf_cmd *cmd,
406 struct pmf_handlers *h)
408 u32 offset = pmf_next32(cmd);
409 u32 mask = pmf_next32(cmd);
410 u32 shift = pmf_next32(cmd);
411 u32 xor = pmf_next32(cmd);
413 LOG_PARSE("pmf: read_reg32_msrx(offset: %x, mask: %x, shift: %x,"
414 " xor: %x\n", offset, mask, shift, xor);
416 PMF_PARSE_CALL(read_reg32_msrx, cmd, h, offset, mask, shift, xor);
419 static int pmf_parser_read_reg16_msrx(struct pmf_cmd *cmd,
420 struct pmf_handlers *h)
422 u32 offset = pmf_next32(cmd);
423 u32 mask = pmf_next32(cmd);
424 u32 shift = pmf_next32(cmd);
425 u32 xor = pmf_next32(cmd);
427 LOG_PARSE("pmf: read_reg16_msrx(offset: %x, mask: %x, shift: %x,"
428 " xor: %x\n", offset, mask, shift, xor);
430 PMF_PARSE_CALL(read_reg16_msrx, cmd, h, offset, mask, shift, xor);
432 static int pmf_parser_read_reg8_msrx(struct pmf_cmd *cmd,
433 struct pmf_handlers *h)
435 u32 offset = pmf_next32(cmd);
436 u32 mask = pmf_next32(cmd);
437 u32 shift = pmf_next32(cmd);
438 u32 xor = pmf_next32(cmd);
440 LOG_PARSE("pmf: read_reg8_msrx(offset: %x, mask: %x, shift: %x,"
441 " xor: %x\n", offset, mask, shift, xor);
443 PMF_PARSE_CALL(read_reg8_msrx, cmd, h, offset, mask, shift, xor);
446 static int pmf_parser_write_reg32_slm(struct pmf_cmd *cmd,
447 struct pmf_handlers *h)
449 u32 offset = pmf_next32(cmd);
450 u32 shift = pmf_next32(cmd);
451 u32 mask = pmf_next32(cmd);
453 LOG_PARSE("pmf: write_reg32_slm(offset: %x, shift: %x, mask: %x\n",
454 offset, shift, mask);
456 PMF_PARSE_CALL(write_reg32_slm, cmd, h, offset, shift, mask);
459 static int pmf_parser_write_reg16_slm(struct pmf_cmd *cmd,
460 struct pmf_handlers *h)
462 u32 offset = pmf_next32(cmd);
463 u32 shift = pmf_next32(cmd);
464 u32 mask = pmf_next32(cmd);
466 LOG_PARSE("pmf: write_reg16_slm(offset: %x, shift: %x, mask: %x\n",
467 offset, shift, mask);
469 PMF_PARSE_CALL(write_reg16_slm, cmd, h, offset, shift, mask);
472 static int pmf_parser_write_reg8_slm(struct pmf_cmd *cmd,
473 struct pmf_handlers *h)
475 u32 offset = pmf_next32(cmd);
476 u32 shift = pmf_next32(cmd);
477 u32 mask = pmf_next32(cmd);
479 LOG_PARSE("pmf: write_reg8_slm(offset: %x, shift: %x, mask: %x\n",
480 offset, shift, mask);
482 PMF_PARSE_CALL(write_reg8_slm, cmd, h, offset, shift, mask);
485 static int pmf_parser_mask_and_compare(struct pmf_cmd *cmd,
486 struct pmf_handlers *h)
488 u32 bytes = pmf_next32(cmd);
489 const void *maskblob = pmf_next_blob(cmd, bytes);
490 const void *valuesblob = pmf_next_blob(cmd, bytes);
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);
496 PMF_PARSE_CALL(mask_and_compare, cmd, h,
497 bytes, maskblob, valuesblob);
501 typedef int (*pmf_cmd_parser_t)(struct pmf_cmd *cmd, struct pmf_handlers *h);
503 static pmf_cmd_parser_t pmf_parsers[PMF_CMD_COUNT] =
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,
515 pmf_parser_wait_reg32,
516 pmf_parser_wait_reg16,
517 pmf_parser_wait_reg8,
519 pmf_parser_write_i2c,
521 NULL, /* Bogus command */
522 NULL, /* Shift bytes right: NYI */
523 NULL, /* Shift bytes left: NYI */
525 pmf_parser_write_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,
541 struct list_head link;
542 struct device_node *node;
543 struct pmf_handlers *handlers;
544 struct list_head functions;
548 static LIST_HEAD(pmf_devices);
549 static DEFINE_SPINLOCK(pmf_lock);
550 static DEFINE_MUTEX(pmf_irq_mutex);
552 static void pmf_release_device(struct kref *kref)
554 struct pmf_device *dev = container_of(kref, struct pmf_device, ref);
558 static inline void pmf_put_device(struct pmf_device *dev)
560 kref_put(&dev->ref, pmf_release_device);
563 static inline struct pmf_device *pmf_get_device(struct pmf_device *dev)
569 static inline struct pmf_device *pmf_find_device(struct device_node *np)
571 struct pmf_device *dev;
573 list_for_each_entry(dev, &pmf_devices, link) {
575 return pmf_get_device(dev);
580 static int pmf_parse_one(struct pmf_function *func,
581 struct pmf_handlers *handlers,
582 void *instdata, struct pmf_args *args)
588 cmd.cmdptr = func->data;
589 cmd.cmdend = func->data + func->length;
591 cmd.instdata = instdata;
595 LOG_PARSE("pmf: func %s, %d bytes, %s...\n",
596 func->name, func->length,
597 handlers ? "executing" : "parsing");
599 /* One subcommand to parse for now */
602 while(count-- && cmd.cmdptr < cmd.cmdend) {
604 ccode = pmf_next32(&cmd);
605 /* Check if we are hitting a command list, fetch new count */
607 count = pmf_next32(&cmd) - 1;
608 ccode = pmf_next32(&cmd);
611 LOG_ERROR("pmf: parse error, not enough data\n");
614 if (ccode >= PMF_CMD_COUNT) {
615 LOG_ERROR("pmf: command code %d unknown !\n", ccode);
618 if (pmf_parsers[ccode] == NULL) {
619 LOG_ERROR("pmf: no parser for command %d !\n", ccode);
622 rc = pmf_parsers[ccode](&cmd, handlers);
624 LOG_ERROR("pmf: parser for command %d returned"
625 " error %d\n", ccode, rc);
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;
637 static int pmf_add_function_prop(struct pmf_device *dev, void *driverdata,
638 const char *name, u32 *data,
642 struct pmf_function *func = NULL;
644 DBG("pmf: Adding functions for platform-do-%s\n", name);
646 while (length >= 12) {
647 /* Allocate a structure */
648 func = kzalloc(sizeof(struct pmf_function), GFP_KERNEL);
651 kref_init(&func->ref);
652 INIT_LIST_HEAD(&func->irq_clients);
653 func->node = dev->node;
654 func->driver_data = driverdata;
656 func->phandle = data[0];
657 func->flags = data[1];
661 func->length = length;
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)) {
670 length -= func->length;
671 data = (u32 *)(((u8 *)data) + func->length);
672 list_add(&func->link, &dev->functions);
677 DBG("pmf: Added %d functions\n", count);
682 static int pmf_add_functions(struct pmf_device *dev, void *driverdata)
685 #define PP_PREFIX "platform-do-"
686 const int plen = strlen(PP_PREFIX);
689 for (pp = dev->node->properties; pp != 0; pp = pp->next) {
691 if (strncmp(pp->name, PP_PREFIX, plen) != 0)
693 name = pp->name + plen;
694 if (strlen(name) && pp->length >= 12)
695 count += pmf_add_function_prop(dev, driverdata, name,
703 int pmf_register_driver(struct device_node *np,
704 struct pmf_handlers *handlers,
707 struct pmf_device *dev;
711 if (handlers == NULL)
714 DBG("pmf: registering driver for node %s\n", np->full_name);
716 spin_lock_irqsave(&pmf_lock, flags);
717 dev = pmf_find_device(np);
718 spin_unlock_irqrestore(&pmf_lock, flags);
720 DBG("pmf: already there !\n");
725 dev = kzalloc(sizeof(struct pmf_device), GFP_KERNEL);
727 DBG("pmf: no memory !\n");
730 kref_init(&dev->ref);
731 dev->node = of_node_get(np);
732 dev->handlers = handlers;
733 INIT_LIST_HEAD(&dev->functions);
735 rc = pmf_add_functions(dev, driverdata);
737 DBG("pmf: no functions, disposing.. \n");
743 spin_lock_irqsave(&pmf_lock, flags);
744 list_add(&dev->link, &pmf_devices);
745 spin_unlock_irqrestore(&pmf_lock, flags);
749 EXPORT_SYMBOL_GPL(pmf_register_driver);
751 struct pmf_function *pmf_get_function(struct pmf_function *func)
753 if (!try_module_get(func->dev->handlers->owner))
755 kref_get(&func->ref);
758 EXPORT_SYMBOL_GPL(pmf_get_function);
760 static void pmf_release_function(struct kref *kref)
762 struct pmf_function *func =
763 container_of(kref, struct pmf_function, ref);
764 pmf_put_device(func->dev);
768 static inline void __pmf_put_function(struct pmf_function *func)
770 kref_put(&func->ref, pmf_release_function);
773 void pmf_put_function(struct pmf_function *func)
777 module_put(func->dev->handlers->owner);
778 __pmf_put_function(func);
780 EXPORT_SYMBOL_GPL(pmf_put_function);
782 void pmf_unregister_driver(struct device_node *np)
784 struct pmf_device *dev;
787 DBG("pmf: unregistering driver for node %s\n", np->full_name);
789 spin_lock_irqsave(&pmf_lock, flags);
790 dev = pmf_find_device(np);
792 DBG("pmf: not such driver !\n");
793 spin_unlock_irqrestore(&pmf_lock, flags);
796 list_del(&dev->link);
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);
806 spin_unlock_irqrestore(&pmf_lock, flags);
808 EXPORT_SYMBOL_GPL(pmf_unregister_driver);
810 struct pmf_function *__pmf_find_function(struct device_node *target,
811 const char *name, u32 flags)
813 struct device_node *actor = of_node_get(target);
814 struct pmf_device *dev;
815 struct pmf_function *func, *result = NULL;
820 * Look for a "platform-*" function reference. If we can't find
821 * one, then we fallback to a direct call attempt
823 snprintf(fname, 63, "platform-%s", name);
824 prop = (u32 *)get_property(target, fname, NULL);
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
836 actor = of_find_node_by_phandle(ph);
840 dev = pmf_find_device(actor);
844 list_for_each_entry(func, &dev->functions, link) {
845 if (name && strcmp(name, func->name))
847 if (func->phandle && target->node != func->phandle)
849 if ((func->flags & flags) == 0)
860 int pmf_register_irq_client(struct device_node *target,
862 struct pmf_irq_client *client)
864 struct pmf_function *func;
867 spin_lock_irqsave(&pmf_lock, flags);
868 func = __pmf_find_function(target, name, PMF_FLAGS_INT_GEN);
870 func = pmf_get_function(func);
871 spin_unlock_irqrestore(&pmf_lock, flags);
875 /* guard against manipulations of list */
876 mutex_lock(&pmf_irq_mutex);
877 if (list_empty(&func->irq_clients))
878 func->dev->handlers->irq_enable(func);
880 /* guard against pmf_do_irq while changing list */
881 spin_lock_irqsave(&pmf_lock, flags);
882 list_add(&client->link, &func->irq_clients);
883 spin_unlock_irqrestore(&pmf_lock, flags);
886 mutex_unlock(&pmf_irq_mutex);
890 EXPORT_SYMBOL_GPL(pmf_register_irq_client);
892 void pmf_unregister_irq_client(struct pmf_irq_client *client)
894 struct pmf_function *func = client->func;
897 BUG_ON(func == NULL);
899 /* guard against manipulations of list */
900 mutex_lock(&pmf_irq_mutex);
903 /* guard against pmf_do_irq while changing list */
904 spin_lock_irqsave(&pmf_lock, flags);
905 list_del(&client->link);
906 spin_unlock_irqrestore(&pmf_lock, flags);
908 if (list_empty(&func->irq_clients))
909 func->dev->handlers->irq_disable(func);
910 mutex_unlock(&pmf_irq_mutex);
911 pmf_put_function(func);
913 EXPORT_SYMBOL_GPL(pmf_unregister_irq_client);
916 void pmf_do_irq(struct pmf_function *func)
919 struct pmf_irq_client *client;
921 /* For now, using a spinlock over the whole function. Can be made
922 * to drop the lock using 2 lists if necessary
924 spin_lock_irqsave(&pmf_lock, flags);
925 list_for_each_entry(client, &func->irq_clients, link) {
926 if (!try_module_get(client->owner))
928 client->handler(client->data);
929 module_put(client->owner);
931 spin_unlock_irqrestore(&pmf_lock, flags);
933 EXPORT_SYMBOL_GPL(pmf_do_irq);
936 int pmf_call_one(struct pmf_function *func, struct pmf_args *args)
938 struct pmf_device *dev = func->dev;
939 void *instdata = NULL;
942 DBG(" ** pmf_call_one(%s/%s) **\n", dev->node->full_name, func->name);
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);
952 EXPORT_SYMBOL_GPL(pmf_call_one);
954 int pmf_do_functions(struct device_node *np, const char *name,
955 u32 phandle, u32 fflags, struct pmf_args *args)
957 struct pmf_device *dev;
958 struct pmf_function *func, *tmp;
962 spin_lock_irqsave(&pmf_lock, flags);
964 dev = pmf_find_device(np);
966 spin_unlock_irqrestore(&pmf_lock, flags);
969 list_for_each_entry_safe(func, tmp, &dev->functions, link) {
970 if (name && strcmp(name, func->name))
972 if (phandle && func->phandle && phandle != func->phandle)
974 if ((func->flags & fflags) == 0)
976 if (pmf_get_function(func) == NULL)
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);
984 spin_unlock_irqrestore(&pmf_lock, flags);
988 EXPORT_SYMBOL_GPL(pmf_do_functions);
991 struct pmf_function *pmf_find_function(struct device_node *target,
994 struct pmf_function *func;
997 spin_lock_irqsave(&pmf_lock, flags);
998 func = __pmf_find_function(target, name, PMF_FLAGS_ON_DEMAND);
1000 func = pmf_get_function(func);
1001 spin_unlock_irqrestore(&pmf_lock, flags);
1004 EXPORT_SYMBOL_GPL(pmf_find_function);
1006 int pmf_call_function(struct device_node *target, const char *name,
1007 struct pmf_args *args)
1009 struct pmf_function *func = pmf_find_function(target, name);
1015 rc = pmf_call_one(func, args);
1016 pmf_put_function(func);
1019 EXPORT_SYMBOL_GPL(pmf_call_function);