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bbf9d17d GR |
1 | /* |
2 | * Freescale Management Complex (MC) bus driver | |
3 | * | |
4 | * Copyright (C) 2014 Freescale Semiconductor, Inc. | |
5 | * Author: German Rivera <German.Rivera@freescale.com> | |
6 | * | |
7 | * This file is licensed under the terms of the GNU General Public | |
8 | * License version 2. This program is licensed "as is" without any | |
9 | * warranty of any kind, whether express or implied. | |
10 | */ | |
11 | ||
12 | #include "../include/mc-private.h" | |
13 | #include <linux/module.h> | |
14 | #include <linux/of_device.h> | |
15 | #include <linux/of_address.h> | |
16 | #include <linux/ioport.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/limits.h> | |
19 | #include "../include/dpmng.h" | |
20 | #include "../include/mc-sys.h" | |
21 | #include "dprc-cmd.h" | |
22 | ||
23 | static struct kmem_cache *mc_dev_cache; | |
24 | ||
25 | /** | |
26 | * fsl_mc_bus_match - device to driver matching callback | |
27 | * @dev: the MC object device structure to match against | |
28 | * @drv: the device driver to search for matching MC object device id | |
29 | * structures | |
30 | * | |
31 | * Returns 1 on success, 0 otherwise. | |
32 | */ | |
33 | static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv) | |
34 | { | |
35 | const struct fsl_mc_device_match_id *id; | |
36 | struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); | |
37 | struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv); | |
38 | bool found = false; | |
39 | ||
40 | if (WARN_ON(!fsl_mc_bus_type.dev_root)) | |
41 | goto out; | |
42 | ||
43 | if (!mc_drv->match_id_table) | |
44 | goto out; | |
45 | ||
46 | /* | |
47 | * If the object is not 'plugged' don't match. | |
48 | * Only exception is the root DPRC, which is a special case. | |
49 | */ | |
50 | if ((mc_dev->obj_desc.state & DPRC_OBJ_STATE_PLUGGED) == 0 && | |
51 | &mc_dev->dev != fsl_mc_bus_type.dev_root) | |
52 | goto out; | |
53 | ||
54 | /* | |
55 | * Traverse the match_id table of the given driver, trying to find | |
56 | * a matching for the given MC object device. | |
57 | */ | |
58 | for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) { | |
59 | if (id->vendor == mc_dev->obj_desc.vendor && | |
60 | strcmp(id->obj_type, mc_dev->obj_desc.type) == 0 && | |
61 | id->ver_major == mc_dev->obj_desc.ver_major && | |
62 | id->ver_minor == mc_dev->obj_desc.ver_minor) { | |
63 | found = true; | |
64 | break; | |
65 | } | |
66 | } | |
67 | ||
68 | out: | |
69 | dev_dbg(dev, "%smatched\n", found ? "" : "not "); | |
70 | return found; | |
71 | } | |
72 | ||
73 | /** | |
74 | * fsl_mc_bus_uevent - callback invoked when a device is added | |
75 | */ | |
76 | static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) | |
77 | { | |
78 | pr_debug("%s invoked\n", __func__); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | struct bus_type fsl_mc_bus_type = { | |
83 | .name = "fsl-mc", | |
84 | .match = fsl_mc_bus_match, | |
85 | .uevent = fsl_mc_bus_uevent, | |
86 | }; | |
87 | EXPORT_SYMBOL_GPL(fsl_mc_bus_type); | |
88 | ||
89 | static int fsl_mc_driver_probe(struct device *dev) | |
90 | { | |
91 | struct fsl_mc_driver *mc_drv; | |
92 | struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); | |
93 | int error; | |
94 | ||
95 | if (WARN_ON(!dev->driver)) | |
96 | return -EINVAL; | |
97 | ||
98 | mc_drv = to_fsl_mc_driver(dev->driver); | |
99 | if (WARN_ON(!mc_drv->probe)) | |
100 | return -EINVAL; | |
101 | ||
102 | error = mc_drv->probe(mc_dev); | |
103 | if (error < 0) { | |
104 | dev_err(dev, "MC object device probe callback failed: %d\n", | |
105 | error); | |
106 | return error; | |
107 | } | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | static int fsl_mc_driver_remove(struct device *dev) | |
113 | { | |
114 | struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver); | |
115 | struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); | |
116 | int error; | |
117 | ||
118 | if (WARN_ON(!dev->driver)) | |
119 | return -EINVAL; | |
120 | ||
121 | error = mc_drv->remove(mc_dev); | |
122 | if (error < 0) { | |
123 | dev_err(dev, | |
124 | "MC object device remove callback failed: %d\n", | |
125 | error); | |
126 | return error; | |
127 | } | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | static void fsl_mc_driver_shutdown(struct device *dev) | |
133 | { | |
134 | struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver); | |
135 | struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); | |
136 | ||
137 | mc_drv->shutdown(mc_dev); | |
138 | } | |
139 | ||
140 | /** | |
141 | * __fsl_mc_driver_register - registers a child device driver with the | |
142 | * MC bus | |
143 | * | |
144 | * This function is implicitly invoked from the registration function of | |
145 | * fsl_mc device drivers, which is generated by the | |
146 | * module_fsl_mc_driver() macro. | |
147 | */ | |
148 | int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver, | |
149 | struct module *owner) | |
150 | { | |
151 | int error; | |
152 | ||
153 | mc_driver->driver.owner = owner; | |
154 | mc_driver->driver.bus = &fsl_mc_bus_type; | |
155 | ||
156 | if (mc_driver->probe) | |
157 | mc_driver->driver.probe = fsl_mc_driver_probe; | |
158 | ||
159 | if (mc_driver->remove) | |
160 | mc_driver->driver.remove = fsl_mc_driver_remove; | |
161 | ||
162 | if (mc_driver->shutdown) | |
163 | mc_driver->driver.shutdown = fsl_mc_driver_shutdown; | |
164 | ||
165 | error = driver_register(&mc_driver->driver); | |
166 | if (error < 0) { | |
167 | pr_err("driver_register() failed for %s: %d\n", | |
168 | mc_driver->driver.name, error); | |
169 | return error; | |
170 | } | |
171 | ||
172 | pr_info("MC object device driver %s registered\n", | |
173 | mc_driver->driver.name); | |
174 | return 0; | |
175 | } | |
176 | EXPORT_SYMBOL_GPL(__fsl_mc_driver_register); | |
177 | ||
178 | /** | |
179 | * fsl_mc_driver_unregister - unregisters a device driver from the | |
180 | * MC bus | |
181 | */ | |
182 | void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver) | |
183 | { | |
184 | driver_unregister(&mc_driver->driver); | |
185 | } | |
186 | EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister); | |
187 | ||
188 | static int get_dprc_icid(struct fsl_mc_io *mc_io, | |
189 | int container_id, uint16_t *icid) | |
190 | { | |
191 | uint16_t dprc_handle; | |
192 | struct dprc_attributes attr; | |
193 | int error; | |
194 | ||
195 | error = dprc_open(mc_io, container_id, &dprc_handle); | |
196 | if (error < 0) { | |
197 | pr_err("dprc_open() failed: %d\n", error); | |
198 | return error; | |
199 | } | |
200 | ||
201 | memset(&attr, 0, sizeof(attr)); | |
202 | error = dprc_get_attributes(mc_io, dprc_handle, &attr); | |
203 | if (error < 0) { | |
204 | pr_err("dprc_get_attributes() failed: %d\n", error); | |
205 | goto common_cleanup; | |
206 | } | |
207 | ||
208 | *icid = attr.icid; | |
209 | error = 0; | |
210 | ||
211 | common_cleanup: | |
212 | (void)dprc_close(mc_io, dprc_handle); | |
213 | return error; | |
214 | } | |
215 | ||
216 | static int translate_mc_addr(uint64_t mc_addr, phys_addr_t *phys_addr) | |
217 | { | |
218 | int i; | |
219 | struct fsl_mc *mc = dev_get_drvdata(fsl_mc_bus_type.dev_root->parent); | |
220 | ||
221 | if (mc->num_translation_ranges == 0) { | |
222 | /* | |
223 | * Do identity mapping: | |
224 | */ | |
225 | *phys_addr = mc_addr; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | for (i = 0; i < mc->num_translation_ranges; i++) { | |
230 | struct fsl_mc_addr_translation_range *range = | |
231 | &mc->translation_ranges[i]; | |
232 | ||
233 | if (mc_addr >= range->start_mc_addr && | |
234 | mc_addr < range->end_mc_addr) { | |
235 | *phys_addr = range->start_phys_addr + | |
236 | (mc_addr - range->start_mc_addr); | |
237 | return 0; | |
238 | } | |
239 | } | |
240 | ||
241 | return -EFAULT; | |
242 | } | |
243 | ||
244 | static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev, | |
245 | struct fsl_mc_device *mc_bus_dev) | |
246 | { | |
247 | int i; | |
248 | int error; | |
249 | struct resource *regions; | |
250 | struct dprc_obj_desc *obj_desc = &mc_dev->obj_desc; | |
251 | struct device *parent_dev = mc_dev->dev.parent; | |
252 | ||
253 | regions = kmalloc_array(obj_desc->region_count, | |
254 | sizeof(regions[0]), GFP_KERNEL); | |
255 | if (!regions) | |
256 | return -ENOMEM; | |
257 | ||
258 | for (i = 0; i < obj_desc->region_count; i++) { | |
259 | struct dprc_region_desc region_desc; | |
260 | ||
261 | error = dprc_get_obj_region(mc_bus_dev->mc_io, | |
262 | mc_bus_dev->mc_handle, | |
263 | obj_desc->type, | |
264 | obj_desc->id, i, ®ion_desc); | |
265 | if (error < 0) { | |
266 | dev_err(parent_dev, | |
267 | "dprc_get_obj_region() failed: %d\n", error); | |
268 | goto error_cleanup_regions; | |
269 | } | |
270 | ||
271 | WARN_ON(region_desc.base_paddr == 0x0); | |
272 | WARN_ON(region_desc.size == 0); | |
273 | error = translate_mc_addr(region_desc.base_paddr, | |
274 | ®ions[i].start); | |
275 | if (error < 0) { | |
276 | dev_err(parent_dev, | |
277 | "Invalid MC address: %#llx\n", | |
278 | region_desc.base_paddr); | |
279 | goto error_cleanup_regions; | |
280 | } | |
281 | ||
282 | regions[i].end = regions[i].start + region_desc.size - 1; | |
283 | regions[i].name = "fsl-mc object MMIO region"; | |
284 | regions[i].flags = IORESOURCE_IO; | |
285 | } | |
286 | ||
287 | mc_dev->regions = regions; | |
288 | return 0; | |
289 | ||
290 | error_cleanup_regions: | |
291 | kfree(regions); | |
292 | return error; | |
293 | } | |
294 | ||
295 | /** | |
296 | * Add a newly discovered MC object device to be visible in Linux | |
297 | */ | |
298 | int fsl_mc_device_add(struct dprc_obj_desc *obj_desc, | |
299 | struct fsl_mc_io *mc_io, | |
300 | struct device *parent_dev, | |
301 | struct fsl_mc_device **new_mc_dev) | |
302 | { | |
303 | int error; | |
304 | struct fsl_mc_device *mc_dev = NULL; | |
305 | struct fsl_mc_bus *mc_bus = NULL; | |
306 | struct fsl_mc_device *parent_mc_dev; | |
307 | ||
308 | if (parent_dev->bus == &fsl_mc_bus_type) | |
309 | parent_mc_dev = to_fsl_mc_device(parent_dev); | |
310 | else | |
311 | parent_mc_dev = NULL; | |
312 | ||
313 | if (strcmp(obj_desc->type, "dprc") == 0) { | |
314 | /* | |
315 | * Allocate an MC bus device object: | |
316 | */ | |
317 | mc_bus = devm_kzalloc(parent_dev, sizeof(*mc_bus), GFP_KERNEL); | |
318 | if (!mc_bus) | |
319 | return -ENOMEM; | |
320 | ||
321 | mc_dev = &mc_bus->mc_dev; | |
322 | } else { | |
323 | /* | |
324 | * Allocate a regular fsl_mc_device object: | |
325 | */ | |
326 | mc_dev = kmem_cache_zalloc(mc_dev_cache, GFP_KERNEL); | |
327 | if (!mc_dev) | |
328 | return -ENOMEM; | |
329 | } | |
330 | ||
331 | mc_dev->obj_desc = *obj_desc; | |
332 | mc_dev->mc_io = mc_io; | |
333 | device_initialize(&mc_dev->dev); | |
334 | mc_dev->dev.parent = parent_dev; | |
335 | mc_dev->dev.bus = &fsl_mc_bus_type; | |
336 | dev_set_name(&mc_dev->dev, "%s.%x", obj_desc->type, obj_desc->id); | |
337 | ||
338 | if (strcmp(obj_desc->type, "dprc") == 0) { | |
339 | struct fsl_mc_io *mc_io2; | |
340 | ||
341 | mc_dev->flags |= FSL_MC_IS_DPRC; | |
342 | ||
343 | /* | |
344 | * To get the DPRC's ICID, we need to open the DPRC | |
345 | * in get_dprc_icid(). For child DPRCs, we do so using the | |
346 | * parent DPRC's MC portal instead of the child DPRC's MC | |
347 | * portal, in case the child DPRC is already opened with | |
348 | * its own portal (e.g., the DPRC used by AIOP). | |
349 | * | |
350 | * NOTE: There cannot be more than one active open for a | |
351 | * given MC object, using the same MC portal. | |
352 | */ | |
353 | if (parent_mc_dev) { | |
354 | /* | |
355 | * device being added is a child DPRC device | |
356 | */ | |
357 | mc_io2 = parent_mc_dev->mc_io; | |
358 | } else { | |
359 | /* | |
360 | * device being added is the root DPRC device | |
361 | */ | |
362 | if (WARN_ON(!mc_io)) { | |
363 | error = -EINVAL; | |
364 | goto error_cleanup_dev; | |
365 | } | |
366 | ||
367 | mc_io2 = mc_io; | |
368 | ||
369 | if (!fsl_mc_bus_type.dev_root) | |
370 | fsl_mc_bus_type.dev_root = &mc_dev->dev; | |
371 | } | |
372 | ||
373 | error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid); | |
374 | if (error < 0) | |
375 | goto error_cleanup_dev; | |
376 | } else { | |
377 | /* | |
378 | * A non-DPRC MC object device has to be a child of another | |
379 | * MC object (specifically a DPRC object) | |
380 | */ | |
381 | mc_dev->icid = parent_mc_dev->icid; | |
382 | mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK; | |
383 | mc_dev->dev.dma_mask = &mc_dev->dma_mask; | |
384 | } | |
385 | ||
386 | /* | |
387 | * Get MMIO regions for the device from the MC: | |
388 | * | |
389 | * NOTE: the root DPRC is a special case as its MMIO region is | |
390 | * obtained from the device tree | |
391 | */ | |
392 | if (parent_mc_dev && obj_desc->region_count != 0) { | |
393 | error = fsl_mc_device_get_mmio_regions(mc_dev, | |
394 | parent_mc_dev); | |
395 | if (error < 0) | |
396 | goto error_cleanup_dev; | |
397 | } | |
398 | ||
399 | /* | |
400 | * The device-specific probe callback will get invoked by device_add() | |
401 | */ | |
402 | error = device_add(&mc_dev->dev); | |
403 | if (error < 0) { | |
404 | dev_err(parent_dev, | |
405 | "device_add() failed for device %s: %d\n", | |
406 | dev_name(&mc_dev->dev), error); | |
407 | goto error_cleanup_dev; | |
408 | } | |
409 | ||
410 | (void)get_device(&mc_dev->dev); | |
411 | dev_dbg(parent_dev, "Added MC object device %s\n", | |
412 | dev_name(&mc_dev->dev)); | |
413 | ||
414 | *new_mc_dev = mc_dev; | |
415 | return 0; | |
416 | ||
417 | error_cleanup_dev: | |
418 | kfree(mc_dev->regions); | |
419 | if (mc_bus) | |
420 | devm_kfree(parent_dev, mc_bus); | |
421 | else | |
422 | kmem_cache_free(mc_dev_cache, mc_dev); | |
423 | ||
424 | return error; | |
425 | } | |
426 | EXPORT_SYMBOL_GPL(fsl_mc_device_add); | |
427 | ||
428 | /** | |
429 | * fsl_mc_device_remove - Remove a MC object device from being visible to | |
430 | * Linux | |
431 | * | |
432 | * @mc_dev: Pointer to a MC object device object | |
433 | */ | |
434 | void fsl_mc_device_remove(struct fsl_mc_device *mc_dev) | |
435 | { | |
436 | struct fsl_mc_bus *mc_bus = NULL; | |
437 | ||
438 | kfree(mc_dev->regions); | |
439 | ||
440 | /* | |
441 | * The device-specific remove callback will get invoked by device_del() | |
442 | */ | |
443 | device_del(&mc_dev->dev); | |
444 | put_device(&mc_dev->dev); | |
445 | ||
446 | if (strcmp(mc_dev->obj_desc.type, "dprc") == 0) { | |
447 | struct fsl_mc_io *mc_io = mc_dev->mc_io; | |
448 | ||
449 | mc_bus = to_fsl_mc_bus(mc_dev); | |
450 | fsl_destroy_mc_io(mc_io); | |
451 | if (&mc_dev->dev == fsl_mc_bus_type.dev_root) | |
452 | fsl_mc_bus_type.dev_root = NULL; | |
453 | } | |
454 | ||
455 | mc_dev->mc_io = NULL; | |
456 | if (mc_bus) | |
457 | devm_kfree(mc_dev->dev.parent, mc_bus); | |
458 | else | |
459 | kmem_cache_free(mc_dev_cache, mc_dev); | |
460 | } | |
461 | EXPORT_SYMBOL_GPL(fsl_mc_device_remove); | |
462 | ||
463 | static int parse_mc_ranges(struct device *dev, | |
464 | int *paddr_cells, | |
465 | int *mc_addr_cells, | |
466 | int *mc_size_cells, | |
467 | const __be32 **ranges_start, | |
468 | uint8_t *num_ranges) | |
469 | { | |
470 | const __be32 *prop; | |
471 | int range_tuple_cell_count; | |
472 | int ranges_len; | |
473 | int tuple_len; | |
474 | struct device_node *mc_node = dev->of_node; | |
475 | ||
476 | *ranges_start = of_get_property(mc_node, "ranges", &ranges_len); | |
477 | if (!(*ranges_start) || !ranges_len) { | |
478 | dev_warn(dev, | |
479 | "missing or empty ranges property for device tree node '%s'\n", | |
480 | mc_node->name); | |
481 | ||
482 | *num_ranges = 0; | |
483 | return 0; | |
484 | } | |
485 | ||
486 | *paddr_cells = of_n_addr_cells(mc_node); | |
487 | ||
488 | prop = of_get_property(mc_node, "#address-cells", NULL); | |
489 | if (prop) | |
490 | *mc_addr_cells = be32_to_cpup(prop); | |
491 | else | |
492 | *mc_addr_cells = *paddr_cells; | |
493 | ||
494 | prop = of_get_property(mc_node, "#size-cells", NULL); | |
495 | if (prop) | |
496 | *mc_size_cells = be32_to_cpup(prop); | |
497 | else | |
498 | *mc_size_cells = of_n_size_cells(mc_node); | |
499 | ||
500 | range_tuple_cell_count = *paddr_cells + *mc_addr_cells + | |
501 | *mc_size_cells; | |
502 | ||
503 | tuple_len = range_tuple_cell_count * sizeof(__be32); | |
504 | if (ranges_len % tuple_len != 0) { | |
505 | dev_err(dev, "malformed ranges property '%s'\n", mc_node->name); | |
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | *num_ranges = ranges_len / tuple_len; | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static int get_mc_addr_translation_ranges(struct device *dev, | |
514 | struct fsl_mc_addr_translation_range | |
515 | **ranges, | |
516 | uint8_t *num_ranges) | |
517 | { | |
518 | int error; | |
519 | int paddr_cells; | |
520 | int mc_addr_cells; | |
521 | int mc_size_cells; | |
522 | int i; | |
523 | const __be32 *ranges_start; | |
524 | const __be32 *cell; | |
525 | ||
526 | error = parse_mc_ranges(dev, | |
527 | &paddr_cells, | |
528 | &mc_addr_cells, | |
529 | &mc_size_cells, | |
530 | &ranges_start, | |
531 | num_ranges); | |
532 | if (error < 0) | |
533 | return error; | |
534 | ||
535 | if (!(*num_ranges)) { | |
536 | /* | |
537 | * Missing or empty ranges property ("ranges;") for the | |
538 | * 'fsl,qoriq-mc' node. In this case, identity mapping | |
539 | * will be used. | |
540 | */ | |
541 | *ranges = NULL; | |
542 | return 0; | |
543 | } | |
544 | ||
545 | *ranges = devm_kcalloc(dev, *num_ranges, | |
546 | sizeof(struct fsl_mc_addr_translation_range), | |
547 | GFP_KERNEL); | |
548 | if (!(*ranges)) | |
549 | return -ENOMEM; | |
550 | ||
551 | cell = ranges_start; | |
552 | for (i = 0; i < *num_ranges; ++i) { | |
553 | struct fsl_mc_addr_translation_range *range = &(*ranges)[i]; | |
554 | ||
555 | range->start_mc_addr = of_read_number(cell, mc_addr_cells); | |
556 | cell += mc_addr_cells; | |
557 | range->start_phys_addr = of_read_number(cell, paddr_cells); | |
558 | cell += paddr_cells; | |
559 | range->end_mc_addr = range->start_mc_addr + | |
560 | of_read_number(cell, mc_size_cells); | |
561 | ||
562 | cell += mc_size_cells; | |
563 | } | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | /** | |
569 | * fsl_mc_bus_probe - callback invoked when the root MC bus is being | |
570 | * added | |
571 | */ | |
572 | static int fsl_mc_bus_probe(struct platform_device *pdev) | |
573 | { | |
574 | struct dprc_obj_desc obj_desc; | |
575 | int error; | |
576 | struct fsl_mc *mc; | |
577 | struct fsl_mc_device *mc_bus_dev = NULL; | |
578 | struct fsl_mc_io *mc_io = NULL; | |
579 | int container_id; | |
580 | phys_addr_t mc_portal_phys_addr; | |
581 | uint32_t mc_portal_size; | |
582 | struct mc_version mc_version; | |
583 | struct resource res; | |
584 | ||
585 | dev_info(&pdev->dev, "Root MC bus device probed"); | |
586 | ||
587 | mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL); | |
588 | if (!mc) | |
589 | return -ENOMEM; | |
590 | ||
591 | platform_set_drvdata(pdev, mc); | |
592 | ||
593 | /* | |
594 | * Get physical address of MC portal for the root DPRC: | |
595 | */ | |
596 | error = of_address_to_resource(pdev->dev.of_node, 0, &res); | |
597 | if (error < 0) { | |
598 | dev_err(&pdev->dev, | |
599 | "of_address_to_resource() failed for %s\n", | |
600 | pdev->dev.of_node->full_name); | |
601 | return error; | |
602 | } | |
603 | ||
604 | mc_portal_phys_addr = res.start; | |
605 | mc_portal_size = resource_size(&res); | |
606 | error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr, | |
607 | mc_portal_size, 0, &mc_io); | |
608 | if (error < 0) | |
609 | return error; | |
610 | ||
611 | error = mc_get_version(mc_io, &mc_version); | |
612 | if (error != 0) { | |
613 | dev_err(&pdev->dev, | |
614 | "mc_get_version() failed with error %d\n", error); | |
615 | goto error_cleanup_mc_io; | |
616 | } | |
617 | ||
618 | dev_info(&pdev->dev, | |
619 | "Freescale Management Complex Firmware version: %u.%u.%u\n", | |
620 | mc_version.major, mc_version.minor, mc_version.revision); | |
621 | ||
622 | if (mc_version.major < MC_VER_MAJOR) { | |
623 | dev_err(&pdev->dev, | |
624 | "ERROR: MC firmware version not supported by driver (driver version: %u.%u)\n", | |
625 | MC_VER_MAJOR, MC_VER_MINOR); | |
626 | error = -ENOTSUPP; | |
627 | goto error_cleanup_mc_io; | |
628 | } | |
629 | ||
630 | if (mc_version.major > MC_VER_MAJOR) { | |
631 | dev_warn(&pdev->dev, | |
632 | "WARNING: driver may not support newer MC firmware features (driver version: %u.%u)\n", | |
633 | MC_VER_MAJOR, MC_VER_MINOR); | |
634 | } | |
635 | ||
636 | error = get_mc_addr_translation_ranges(&pdev->dev, | |
637 | &mc->translation_ranges, | |
638 | &mc->num_translation_ranges); | |
639 | if (error < 0) | |
640 | goto error_cleanup_mc_io; | |
641 | ||
642 | error = dpmng_get_container_id(mc_io, &container_id); | |
643 | if (error < 0) { | |
644 | dev_err(&pdev->dev, | |
645 | "dpmng_get_container_id() failed: %d\n", error); | |
646 | goto error_cleanup_mc_io; | |
647 | } | |
648 | ||
649 | obj_desc.vendor = FSL_MC_VENDOR_FREESCALE; | |
650 | strcpy(obj_desc.type, "dprc"); | |
651 | obj_desc.id = container_id; | |
652 | obj_desc.ver_major = DPRC_VER_MAJOR; | |
653 | obj_desc.ver_minor = DPRC_VER_MINOR; | |
654 | obj_desc.region_count = 0; | |
655 | ||
656 | error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev); | |
657 | if (error < 0) | |
658 | goto error_cleanup_mc_io; | |
659 | ||
660 | mc->root_mc_bus_dev = mc_bus_dev; | |
661 | return 0; | |
662 | ||
663 | error_cleanup_mc_io: | |
664 | fsl_destroy_mc_io(mc_io); | |
665 | return error; | |
666 | } | |
667 | ||
668 | /** | |
669 | * fsl_mc_bus_remove - callback invoked when the root MC bus is being | |
670 | * removed | |
671 | */ | |
672 | static int fsl_mc_bus_remove(struct platform_device *pdev) | |
673 | { | |
674 | struct fsl_mc *mc = platform_get_drvdata(pdev); | |
675 | ||
676 | if (WARN_ON(&mc->root_mc_bus_dev->dev != fsl_mc_bus_type.dev_root)) | |
677 | return -EINVAL; | |
678 | ||
679 | fsl_mc_device_remove(mc->root_mc_bus_dev); | |
680 | dev_info(&pdev->dev, "Root MC bus device removed"); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static const struct of_device_id fsl_mc_bus_match_table[] = { | |
685 | {.compatible = "fsl,qoriq-mc",}, | |
686 | {}, | |
687 | }; | |
688 | ||
689 | MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table); | |
690 | ||
691 | static struct platform_driver fsl_mc_bus_driver = { | |
692 | .driver = { | |
693 | .name = "fsl_mc_bus", | |
694 | .owner = THIS_MODULE, | |
695 | .pm = NULL, | |
696 | .of_match_table = fsl_mc_bus_match_table, | |
697 | }, | |
698 | .probe = fsl_mc_bus_probe, | |
699 | .remove = fsl_mc_bus_remove, | |
700 | }; | |
701 | ||
702 | static int __init fsl_mc_bus_driver_init(void) | |
703 | { | |
704 | int error; | |
705 | ||
706 | mc_dev_cache = kmem_cache_create("fsl_mc_device", | |
707 | sizeof(struct fsl_mc_device), 0, 0, | |
708 | NULL); | |
709 | if (!mc_dev_cache) { | |
710 | pr_err("Could not create fsl_mc_device cache\n"); | |
711 | return -ENOMEM; | |
712 | } | |
713 | ||
714 | error = bus_register(&fsl_mc_bus_type); | |
715 | if (error < 0) { | |
716 | pr_err("fsl-mc bus type registration failed: %d\n", error); | |
717 | goto error_cleanup_cache; | |
718 | } | |
719 | ||
720 | pr_info("fsl-mc bus type registered\n"); | |
721 | ||
722 | error = platform_driver_register(&fsl_mc_bus_driver); | |
723 | if (error < 0) { | |
724 | pr_err("platform_driver_register() failed: %d\n", error); | |
725 | goto error_cleanup_bus; | |
726 | } | |
727 | ||
728 | return 0; | |
729 | ||
730 | error_cleanup_bus: | |
731 | bus_unregister(&fsl_mc_bus_type); | |
732 | ||
733 | error_cleanup_cache: | |
734 | kmem_cache_destroy(mc_dev_cache); | |
735 | return error; | |
736 | } | |
737 | ||
738 | postcore_initcall(fsl_mc_bus_driver_init); | |
739 | ||
740 | static void __exit fsl_mc_bus_driver_exit(void) | |
741 | { | |
742 | if (WARN_ON(!mc_dev_cache)) | |
743 | return; | |
744 | ||
745 | platform_driver_unregister(&fsl_mc_bus_driver); | |
746 | bus_unregister(&fsl_mc_bus_type); | |
747 | kmem_cache_destroy(mc_dev_cache); | |
748 | pr_info("MC bus unregistered\n"); | |
749 | } | |
750 | ||
751 | module_exit(fsl_mc_bus_driver_exit); | |
752 | ||
753 | MODULE_AUTHOR("Freescale Semiconductor Inc."); | |
754 | MODULE_DESCRIPTION("Freescale Management Complex (MC) bus driver"); | |
755 | MODULE_LICENSE("GPL"); |