Commit | Line | Data |
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b04b65ab PW |
1 | /* |
2 | * omap_device implementation | |
3 | * | |
887adeac | 4 | * Copyright (C) 2009-2010 Nokia Corporation |
4788da26 | 5 | * Paul Walmsley, Kevin Hilman |
b04b65ab PW |
6 | * |
7 | * Developed in collaboration with (alphabetical order): Benoit | |
4788da26 | 8 | * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram |
b04b65ab PW |
9 | * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard |
10 | * Woodruff | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | * This code provides a consistent interface for OMAP device drivers | |
17 | * to control power management and interconnect properties of their | |
18 | * devices. | |
19 | * | |
c1d1cd59 PW |
20 | * In the medium- to long-term, this code should be implemented as a |
21 | * proper omap_bus/omap_device in Linux, no more platform_data func | |
22 | * pointers | |
b04b65ab PW |
23 | * |
24 | * | |
b04b65ab PW |
25 | */ |
26 | #undef DEBUG | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/platform_device.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
b04b65ab PW |
31 | #include <linux/err.h> |
32 | #include <linux/io.h> | |
4ef7aca8 | 33 | #include <linux/clk.h> |
da0653fe | 34 | #include <linux/clkdev.h> |
989561de | 35 | #include <linux/pm_domain.h> |
345f79b3 | 36 | #include <linux/pm_runtime.h> |
dc2d07eb | 37 | #include <linux/of.h> |
d85a2d61 TL |
38 | #include <linux/of_address.h> |
39 | #include <linux/of_irq.h> | |
dc2d07eb | 40 | #include <linux/notifier.h> |
b04b65ab | 41 | |
dad12d11 | 42 | #include "common.h" |
b76c8b19 | 43 | #include "soc.h" |
25c7d49e | 44 | #include "omap_device.h" |
2a296c8f | 45 | #include "omap_hwmod.h" |
b04b65ab | 46 | |
b04b65ab PW |
47 | /* Private functions */ |
48 | ||
bf1e0776 BC |
49 | static void _add_clkdev(struct omap_device *od, const char *clk_alias, |
50 | const char *clk_name) | |
51 | { | |
52 | struct clk *r; | |
1ca90bd4 | 53 | int rc; |
bf1e0776 BC |
54 | |
55 | if (!clk_alias || !clk_name) | |
56 | return; | |
57 | ||
d66b3fe4 | 58 | dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name); |
bf1e0776 | 59 | |
d66b3fe4 | 60 | r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias); |
bf1e0776 | 61 | if (!IS_ERR(r)) { |
9a02ae4e | 62 | dev_dbg(&od->pdev->dev, |
49882c99 | 63 | "alias %s already exists\n", clk_alias); |
bf1e0776 BC |
64 | clk_put(r); |
65 | return; | |
66 | } | |
67 | ||
59dcfc48 TK |
68 | r = clk_get_sys(NULL, clk_name); |
69 | ||
1aa8f0cb | 70 | if (IS_ERR(r)) { |
59dcfc48 TK |
71 | struct of_phandle_args clkspec; |
72 | ||
73 | clkspec.np = of_find_node_by_name(NULL, clk_name); | |
74 | ||
75 | r = of_clk_get_from_provider(&clkspec); | |
76 | ||
77 | rc = clk_register_clkdev(r, clk_alias, | |
78 | dev_name(&od->pdev->dev)); | |
79 | } else { | |
80 | rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev), | |
81 | clk_name, NULL); | |
82 | } | |
83 | ||
1ca90bd4 RK |
84 | if (rc) { |
85 | if (rc == -ENODEV || rc == -ENOMEM) | |
86 | dev_err(&od->pdev->dev, | |
87 | "clkdev_alloc for %s failed\n", clk_alias); | |
88 | else | |
89 | dev_err(&od->pdev->dev, | |
90 | "clk_get for %s failed\n", clk_name); | |
bf1e0776 | 91 | } |
bf1e0776 BC |
92 | } |
93 | ||
4ef7aca8 | 94 | /** |
bf1e0776 BC |
95 | * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks |
96 | * and main clock | |
4ef7aca8 | 97 | * @od: struct omap_device *od |
bf1e0776 | 98 | * @oh: struct omap_hwmod *oh |
4ef7aca8 | 99 | * |
bf1e0776 BC |
100 | * For the main clock and every optional clock present per hwmod per |
101 | * omap_device, this function adds an entry in the clkdev table of the | |
102 | * form <dev-id=dev_name, con-id=role> if it does not exist already. | |
4ef7aca8 PB |
103 | * |
104 | * The function is called from inside omap_device_build_ss(), after | |
105 | * omap_device_register. | |
106 | * | |
107 | * This allows drivers to get a pointer to its optional clocks based on its role | |
108 | * by calling clk_get(<dev*>, <role>). | |
bf1e0776 | 109 | * In the case of the main clock, a "fck" alias is used. |
4ef7aca8 PB |
110 | * |
111 | * No return value. | |
112 | */ | |
bf1e0776 BC |
113 | static void _add_hwmod_clocks_clkdev(struct omap_device *od, |
114 | struct omap_hwmod *oh) | |
4ef7aca8 PB |
115 | { |
116 | int i; | |
117 | ||
bf1e0776 | 118 | _add_clkdev(od, "fck", oh->main_clk); |
da0653fe | 119 | |
bf1e0776 BC |
120 | for (i = 0; i < oh->opt_clks_cnt; i++) |
121 | _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk); | |
4ef7aca8 PB |
122 | } |
123 | ||
b04b65ab | 124 | |
dc2d07eb BC |
125 | /** |
126 | * omap_device_build_from_dt - build an omap_device with multiple hwmods | |
127 | * @pdev_name: name of the platform_device driver to use | |
128 | * @pdev_id: this platform_device's connection ID | |
129 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
130 | * @pdata: platform_data ptr to associate with the platform_device | |
131 | * @pdata_len: amount of memory pointed to by @pdata | |
dc2d07eb BC |
132 | * |
133 | * Function for building an omap_device already registered from device-tree | |
134 | * | |
135 | * Returns 0 or PTR_ERR() on error. | |
136 | */ | |
137 | static int omap_device_build_from_dt(struct platform_device *pdev) | |
138 | { | |
139 | struct omap_hwmod **hwmods; | |
140 | struct omap_device *od; | |
141 | struct omap_hwmod *oh; | |
142 | struct device_node *node = pdev->dev.of_node; | |
143 | const char *oh_name; | |
144 | int oh_cnt, i, ret = 0; | |
7268032d | 145 | bool device_active = false; |
dc2d07eb BC |
146 | |
147 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); | |
c48cd659 | 148 | if (oh_cnt <= 0) { |
5dc06b7e | 149 | dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n"); |
dc2d07eb BC |
150 | return -ENODEV; |
151 | } | |
152 | ||
153 | hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
154 | if (!hwmods) { | |
155 | ret = -ENOMEM; | |
156 | goto odbfd_exit; | |
157 | } | |
158 | ||
159 | for (i = 0; i < oh_cnt; i++) { | |
160 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); | |
161 | oh = omap_hwmod_lookup(oh_name); | |
162 | if (!oh) { | |
163 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", | |
164 | oh_name); | |
165 | ret = -EINVAL; | |
166 | goto odbfd_exit1; | |
167 | } | |
168 | hwmods[i] = oh; | |
7268032d RN |
169 | if (oh->flags & HWMOD_INIT_NO_IDLE) |
170 | device_active = true; | |
dc2d07eb BC |
171 | } |
172 | ||
c1d1cd59 | 173 | od = omap_device_alloc(pdev, hwmods, oh_cnt); |
4cf9cf89 | 174 | if (IS_ERR(od)) { |
dc2d07eb BC |
175 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", |
176 | oh_name); | |
177 | ret = PTR_ERR(od); | |
178 | goto odbfd_exit1; | |
179 | } | |
180 | ||
3956a1a0 PU |
181 | /* Fix up missing resource names */ |
182 | for (i = 0; i < pdev->num_resources; i++) { | |
183 | struct resource *r = &pdev->resource[i]; | |
184 | ||
185 | if (r->name == NULL) | |
186 | r->name = dev_name(&pdev->dev); | |
187 | } | |
188 | ||
989561de | 189 | dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain); |
dc2d07eb | 190 | |
7268032d RN |
191 | if (device_active) { |
192 | omap_device_enable(pdev); | |
193 | pm_runtime_set_active(&pdev->dev); | |
194 | } | |
195 | ||
dc2d07eb BC |
196 | odbfd_exit1: |
197 | kfree(hwmods); | |
198 | odbfd_exit: | |
f5c33b07 NM |
199 | /* if data/we are at fault.. load up a fail handler */ |
200 | if (ret) | |
989561de | 201 | dev_pm_domain_set(&pdev->dev, &omap_device_fail_pm_domain); |
f5c33b07 | 202 | |
dc2d07eb BC |
203 | return ret; |
204 | } | |
205 | ||
206 | static int _omap_device_notifier_call(struct notifier_block *nb, | |
207 | unsigned long event, void *dev) | |
208 | { | |
209 | struct platform_device *pdev = to_platform_device(dev); | |
e753345b | 210 | struct omap_device *od; |
cf26f113 | 211 | int err; |
dc2d07eb BC |
212 | |
213 | switch (event) { | |
213fa10d | 214 | case BUS_NOTIFY_REMOVED_DEVICE: |
dc2d07eb BC |
215 | if (pdev->archdata.od) |
216 | omap_device_delete(pdev->archdata.od); | |
217 | break; | |
cf26f113 TL |
218 | case BUS_NOTIFY_UNBOUND_DRIVER: |
219 | od = to_omap_device(pdev); | |
220 | if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED)) { | |
221 | dev_info(dev, "enabled after unload, idling\n"); | |
222 | err = omap_device_idle(pdev); | |
223 | if (err) | |
224 | dev_err(dev, "failed to idle\n"); | |
225 | } | |
226 | break; | |
04abaf07 DG |
227 | case BUS_NOTIFY_BIND_DRIVER: |
228 | od = to_omap_device(pdev); | |
229 | if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED) && | |
230 | pm_runtime_status_suspended(dev)) { | |
231 | od->_driver_status = BUS_NOTIFY_BIND_DRIVER; | |
232 | pm_runtime_set_active(dev); | |
233 | } | |
234 | break; | |
e753345b KH |
235 | case BUS_NOTIFY_ADD_DEVICE: |
236 | if (pdev->dev.of_node) | |
237 | omap_device_build_from_dt(pdev); | |
dad12d11 | 238 | omap_auxdata_legacy_init(dev); |
e753345b KH |
239 | /* fall through */ |
240 | default: | |
241 | od = to_omap_device(pdev); | |
242 | if (od) | |
243 | od->_driver_status = event; | |
dc2d07eb BC |
244 | } |
245 | ||
246 | return NOTIFY_DONE; | |
247 | } | |
248 | ||
c1d1cd59 PW |
249 | /** |
250 | * _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods | |
251 | * @od: struct omap_device *od | |
252 | * | |
253 | * Enable all underlying hwmods. Returns 0. | |
254 | */ | |
255 | static int _omap_device_enable_hwmods(struct omap_device *od) | |
256 | { | |
6da23358 | 257 | int ret = 0; |
c1d1cd59 PW |
258 | int i; |
259 | ||
260 | for (i = 0; i < od->hwmods_cnt; i++) | |
6da23358 | 261 | ret |= omap_hwmod_enable(od->hwmods[i]); |
c1d1cd59 | 262 | |
6da23358 | 263 | return ret; |
c1d1cd59 PW |
264 | } |
265 | ||
266 | /** | |
267 | * _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods | |
268 | * @od: struct omap_device *od | |
269 | * | |
270 | * Idle all underlying hwmods. Returns 0. | |
271 | */ | |
272 | static int _omap_device_idle_hwmods(struct omap_device *od) | |
273 | { | |
6da23358 | 274 | int ret = 0; |
c1d1cd59 PW |
275 | int i; |
276 | ||
277 | for (i = 0; i < od->hwmods_cnt; i++) | |
6da23358 | 278 | ret |= omap_hwmod_idle(od->hwmods[i]); |
c1d1cd59 | 279 | |
6da23358 | 280 | return ret; |
c1d1cd59 | 281 | } |
dc2d07eb | 282 | |
b04b65ab PW |
283 | /* Public functions for use by core code */ |
284 | ||
c80705aa KH |
285 | /** |
286 | * omap_device_get_context_loss_count - get lost context count | |
287 | * @od: struct omap_device * | |
288 | * | |
289 | * Using the primary hwmod, query the context loss count for this | |
290 | * device. | |
291 | * | |
292 | * Callers should consider context for this device lost any time this | |
293 | * function returns a value different than the value the caller got | |
294 | * the last time it called this function. | |
295 | * | |
f733e7c0 | 296 | * If any hwmods exist for the omap_device associated with @pdev, |
c80705aa KH |
297 | * return the context loss counter for that hwmod, otherwise return |
298 | * zero. | |
299 | */ | |
fc013873 | 300 | int omap_device_get_context_loss_count(struct platform_device *pdev) |
c80705aa KH |
301 | { |
302 | struct omap_device *od; | |
303 | u32 ret = 0; | |
304 | ||
8f0d69de | 305 | od = to_omap_device(pdev); |
c80705aa KH |
306 | |
307 | if (od->hwmods_cnt) | |
308 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); | |
309 | ||
310 | return ret; | |
311 | } | |
312 | ||
a4f6cdb0 BC |
313 | /** |
314 | * omap_device_alloc - allocate an omap_device | |
315 | * @pdev: platform_device that will be included in this omap_device | |
316 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
317 | * @pdata: platform_data ptr to associate with the platform_device | |
318 | * @pdata_len: amount of memory pointed to by @pdata | |
a4f6cdb0 BC |
319 | * |
320 | * Convenience function for allocating an omap_device structure and filling | |
c1d1cd59 | 321 | * hwmods, and resources. |
a4f6cdb0 BC |
322 | * |
323 | * Returns an struct omap_device pointer or ERR_PTR() on error; | |
324 | */ | |
993e4fbd | 325 | struct omap_device *omap_device_alloc(struct platform_device *pdev, |
c1d1cd59 | 326 | struct omap_hwmod **ohs, int oh_cnt) |
a4f6cdb0 BC |
327 | { |
328 | int ret = -ENOMEM; | |
329 | struct omap_device *od; | |
c2b84a9b | 330 | int i; |
a4f6cdb0 BC |
331 | struct omap_hwmod **hwmods; |
332 | ||
333 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); | |
334 | if (!od) { | |
335 | ret = -ENOMEM; | |
336 | goto oda_exit1; | |
337 | } | |
338 | od->hwmods_cnt = oh_cnt; | |
339 | ||
340 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
341 | if (!hwmods) | |
342 | goto oda_exit2; | |
343 | ||
344 | od->hwmods = hwmods; | |
345 | od->pdev = pdev; | |
a4f6cdb0 BC |
346 | pdev->archdata.od = od; |
347 | ||
348 | for (i = 0; i < oh_cnt; i++) { | |
349 | hwmods[i]->od = od; | |
350 | _add_hwmod_clocks_clkdev(od, hwmods[i]); | |
351 | } | |
352 | ||
353 | return od; | |
354 | ||
a4f6cdb0 BC |
355 | oda_exit2: |
356 | kfree(od); | |
357 | oda_exit1: | |
358 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); | |
359 | ||
360 | return ERR_PTR(ret); | |
361 | } | |
362 | ||
993e4fbd | 363 | void omap_device_delete(struct omap_device *od) |
a4f6cdb0 | 364 | { |
dc2d07eb BC |
365 | if (!od) |
366 | return; | |
367 | ||
a4f6cdb0 | 368 | od->pdev->archdata.od = NULL; |
a4f6cdb0 BC |
369 | kfree(od->hwmods); |
370 | kfree(od); | |
371 | } | |
372 | ||
d85a2d61 TL |
373 | /** |
374 | * omap_device_copy_resources - Add legacy IO and IRQ resources | |
375 | * @oh: interconnect target module | |
376 | * @pdev: platform device to copy resources to | |
377 | * | |
378 | * We still have legacy DMA and smartreflex needing resources. | |
379 | * Let's populate what they need until we can eventually just | |
380 | * remove this function. Note that there should be no need to | |
381 | * call this from omap_device_build_from_dt(), nor should there | |
382 | * be any need to call it for other devices. | |
383 | */ | |
384 | static int | |
385 | omap_device_copy_resources(struct omap_hwmod *oh, | |
386 | struct platform_device *pdev) | |
387 | { | |
388 | struct device_node *np, *child; | |
389 | struct property *prop; | |
390 | struct resource *res; | |
391 | const char *name; | |
392 | int error, irq = 0; | |
393 | ||
f0c96c6d TL |
394 | if (!oh || !oh->od || !oh->od->pdev) |
395 | return -EINVAL; | |
d85a2d61 TL |
396 | |
397 | np = oh->od->pdev->dev.of_node; | |
398 | if (!np) { | |
399 | error = -ENODEV; | |
400 | goto error; | |
401 | } | |
402 | ||
403 | res = kzalloc(sizeof(*res) * 2, GFP_KERNEL); | |
404 | if (!res) | |
405 | return -ENOMEM; | |
406 | ||
407 | /* Do we have a dts range for the interconnect target module? */ | |
408 | error = omap_hwmod_parse_module_range(oh, np, res); | |
409 | ||
410 | /* No ranges, rely on device reg entry */ | |
411 | if (error) | |
412 | error = of_address_to_resource(np, 0, res); | |
413 | if (error) | |
414 | goto free; | |
415 | ||
416 | /* SmartReflex needs first IO resource name to be "mpu" */ | |
417 | res[0].name = "mpu"; | |
418 | ||
419 | /* | |
420 | * We may have a configured "ti,sysc" interconnect target with a | |
421 | * dts child with the interrupt. If so use the first child's | |
422 | * first interrupt for "ti-hwmods" legacy support. | |
423 | */ | |
424 | of_property_for_each_string(np, "compatible", prop, name) | |
425 | if (!strncmp("ti,sysc-", name, 8)) | |
426 | break; | |
427 | ||
428 | child = of_get_next_available_child(np, NULL); | |
429 | ||
430 | if (name) | |
431 | irq = irq_of_parse_and_map(child, 0); | |
432 | if (!irq) | |
433 | irq = irq_of_parse_and_map(np, 0); | |
552ee302 WY |
434 | if (!irq) { |
435 | error = -EINVAL; | |
d85a2d61 | 436 | goto free; |
552ee302 | 437 | } |
d85a2d61 TL |
438 | |
439 | /* Legacy DMA code needs interrupt name to be "0" */ | |
440 | res[1].start = irq; | |
441 | res[1].end = irq; | |
442 | res[1].flags = IORESOURCE_IRQ; | |
443 | res[1].name = "0"; | |
444 | ||
445 | error = platform_device_add_resources(pdev, res, 2); | |
446 | ||
447 | free: | |
448 | kfree(res); | |
449 | ||
450 | error: | |
451 | WARN(error, "%s: %s device %s failed: %i\n", | |
452 | __func__, oh->name, dev_name(&pdev->dev), | |
453 | error); | |
454 | ||
455 | return error; | |
456 | } | |
457 | ||
b04b65ab PW |
458 | /** |
459 | * omap_device_build - build and register an omap_device with one omap_hwmod | |
460 | * @pdev_name: name of the platform_device driver to use | |
461 | * @pdev_id: this platform_device's connection ID | |
462 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
463 | * @pdata: platform_data ptr to associate with the platform_device | |
464 | * @pdata_len: amount of memory pointed to by @pdata | |
b04b65ab PW |
465 | * |
466 | * Convenience function for building and registering a single | |
467 | * omap_device record, which in turn builds and registers a | |
468 | * platform_device record. See omap_device_build_ss() for more | |
469 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, | |
470 | * passes along the return value of omap_device_build_ss(). | |
471 | */ | |
c1d1cd59 PW |
472 | struct platform_device __init *omap_device_build(const char *pdev_name, |
473 | int pdev_id, | |
474 | struct omap_hwmod *oh, | |
475 | void *pdata, int pdata_len) | |
b04b65ab PW |
476 | { |
477 | int ret = -ENOMEM; | |
d66b3fe4 | 478 | struct platform_device *pdev; |
b04b65ab | 479 | struct omap_device *od; |
b04b65ab | 480 | |
d85a2d61 | 481 | if (!oh || !pdev_name) |
b04b65ab PW |
482 | return ERR_PTR(-EINVAL); |
483 | ||
484 | if (!pdata && pdata_len > 0) | |
485 | return ERR_PTR(-EINVAL); | |
486 | ||
d85a2d61 TL |
487 | if (strncmp(oh->name, "smartreflex", 11) && |
488 | strncmp(oh->name, "dma", 3)) { | |
489 | pr_warn("%s need to update %s to probe with dt\na", | |
490 | __func__, pdev_name); | |
491 | ret = -ENODEV; | |
492 | goto odbs_exit; | |
493 | } | |
494 | ||
d66b3fe4 KH |
495 | pdev = platform_device_alloc(pdev_name, pdev_id); |
496 | if (!pdev) { | |
497 | ret = -ENOMEM; | |
498 | goto odbs_exit; | |
499 | } | |
500 | ||
a4f6cdb0 BC |
501 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
502 | if (pdev->id != -1) | |
503 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
504 | else | |
505 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
b04b65ab | 506 | |
d85a2d61 TL |
507 | /* |
508 | * Must be called before omap_device_alloc() as oh->od | |
509 | * only contains the currently registered omap_device | |
510 | * and will get overwritten by omap_device_alloc(). | |
511 | */ | |
512 | ret = omap_device_copy_resources(oh, pdev); | |
513 | if (ret) | |
514 | goto odbs_exit1; | |
515 | ||
516 | od = omap_device_alloc(pdev, &oh, 1); | |
e9a9bb4e DC |
517 | if (IS_ERR(od)) { |
518 | ret = PTR_ERR(od); | |
d66b3fe4 | 519 | goto odbs_exit1; |
e9a9bb4e | 520 | } |
d66b3fe4 KH |
521 | |
522 | ret = platform_device_add_data(pdev, pdata, pdata_len); | |
49b368a6 | 523 | if (ret) |
a4f6cdb0 | 524 | goto odbs_exit2; |
b04b65ab | 525 | |
c1d1cd59 | 526 | ret = omap_device_register(pdev); |
d66b3fe4 | 527 | if (ret) |
a4f6cdb0 | 528 | goto odbs_exit2; |
06563581 | 529 | |
d66b3fe4 | 530 | return pdev; |
b04b65ab | 531 | |
d66b3fe4 | 532 | odbs_exit2: |
a4f6cdb0 | 533 | omap_device_delete(od); |
d66b3fe4 KH |
534 | odbs_exit1: |
535 | platform_device_put(pdev); | |
536 | odbs_exit: | |
b04b65ab PW |
537 | |
538 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); | |
539 | ||
540 | return ERR_PTR(ret); | |
541 | } | |
542 | ||
bf7c5449 | 543 | #ifdef CONFIG_PM |
638080c3 KH |
544 | static int _od_runtime_suspend(struct device *dev) |
545 | { | |
546 | struct platform_device *pdev = to_platform_device(dev); | |
345f79b3 | 547 | int ret; |
638080c3 | 548 | |
345f79b3 | 549 | ret = pm_generic_runtime_suspend(dev); |
6da23358 PR |
550 | if (ret) |
551 | return ret; | |
345f79b3 | 552 | |
6da23358 | 553 | return omap_device_idle(pdev); |
345f79b3 KH |
554 | } |
555 | ||
638080c3 KH |
556 | static int _od_runtime_resume(struct device *dev) |
557 | { | |
558 | struct platform_device *pdev = to_platform_device(dev); | |
6da23358 | 559 | int ret; |
638080c3 | 560 | |
6da23358 | 561 | ret = omap_device_enable(pdev); |
08c78e9d TL |
562 | if (ret) { |
563 | dev_err(dev, "use pm_runtime_put_sync_suspend() in driver?\n"); | |
6da23358 | 564 | return ret; |
08c78e9d | 565 | } |
345f79b3 KH |
566 | |
567 | return pm_generic_runtime_resume(dev); | |
638080c3 | 568 | } |
f5c33b07 NM |
569 | |
570 | static int _od_fail_runtime_suspend(struct device *dev) | |
571 | { | |
572 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); | |
573 | return -ENODEV; | |
574 | } | |
575 | ||
576 | static int _od_fail_runtime_resume(struct device *dev) | |
577 | { | |
578 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); | |
579 | return -ENODEV; | |
580 | } | |
581 | ||
256a5435 | 582 | #endif |
638080c3 | 583 | |
c03f007a KH |
584 | #ifdef CONFIG_SUSPEND |
585 | static int _od_suspend_noirq(struct device *dev) | |
586 | { | |
587 | struct platform_device *pdev = to_platform_device(dev); | |
588 | struct omap_device *od = to_omap_device(pdev); | |
589 | int ret; | |
590 | ||
72bb6f9b KH |
591 | /* Don't attempt late suspend on a driver that is not bound */ |
592 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) | |
593 | return 0; | |
594 | ||
c03f007a KH |
595 | ret = pm_generic_suspend_noirq(dev); |
596 | ||
597 | if (!ret && !pm_runtime_status_suspended(dev)) { | |
598 | if (pm_generic_runtime_suspend(dev) == 0) { | |
4b7ec5ac | 599 | omap_device_idle(pdev); |
c03f007a KH |
600 | od->flags |= OMAP_DEVICE_SUSPENDED; |
601 | } | |
602 | } | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
607 | static int _od_resume_noirq(struct device *dev) | |
608 | { | |
609 | struct platform_device *pdev = to_platform_device(dev); | |
610 | struct omap_device *od = to_omap_device(pdev); | |
611 | ||
3522bf7b | 612 | if (od->flags & OMAP_DEVICE_SUSPENDED) { |
c03f007a | 613 | od->flags &= ~OMAP_DEVICE_SUSPENDED; |
4b7ec5ac | 614 | omap_device_enable(pdev); |
c03f007a KH |
615 | pm_generic_runtime_resume(dev); |
616 | } | |
617 | ||
618 | return pm_generic_resume_noirq(dev); | |
619 | } | |
126caf13 KH |
620 | #else |
621 | #define _od_suspend_noirq NULL | |
622 | #define _od_resume_noirq NULL | |
c03f007a KH |
623 | #endif |
624 | ||
f5c33b07 NM |
625 | struct dev_pm_domain omap_device_fail_pm_domain = { |
626 | .ops = { | |
627 | SET_RUNTIME_PM_OPS(_od_fail_runtime_suspend, | |
628 | _od_fail_runtime_resume, NULL) | |
629 | } | |
630 | }; | |
631 | ||
3ec2decb | 632 | struct dev_pm_domain omap_device_pm_domain = { |
638080c3 | 633 | .ops = { |
256a5435 | 634 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
45f0a85c | 635 | NULL) |
638080c3 | 636 | USE_PLATFORM_PM_SLEEP_OPS |
c381f229 GS |
637 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq, |
638 | _od_resume_noirq) | |
638080c3 KH |
639 | } |
640 | }; | |
641 | ||
b04b65ab PW |
642 | /** |
643 | * omap_device_register - register an omap_device with one omap_hwmod | |
644 | * @od: struct omap_device * to register | |
645 | * | |
646 | * Register the omap_device structure. This currently just calls | |
647 | * platform_device_register() on the underlying platform_device. | |
648 | * Returns the return value of platform_device_register(). | |
649 | */ | |
993e4fbd | 650 | int omap_device_register(struct platform_device *pdev) |
b04b65ab | 651 | { |
bfae4f8f | 652 | pr_debug("omap_device: %s: registering\n", pdev->name); |
b04b65ab | 653 | |
989561de | 654 | dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain); |
d66b3fe4 | 655 | return platform_device_add(pdev); |
b04b65ab PW |
656 | } |
657 | ||
658 | ||
659 | /* Public functions for use by device drivers through struct platform_data */ | |
660 | ||
661 | /** | |
662 | * omap_device_enable - fully activate an omap_device | |
663 | * @od: struct omap_device * to activate | |
664 | * | |
665 | * Do whatever is necessary for the hwmods underlying omap_device @od | |
666 | * to be accessible and ready to operate. This generally involves | |
667 | * enabling clocks, setting SYSCONFIG registers; and in the future may | |
668 | * involve remuxing pins. Device drivers should call this function | |
c1d1cd59 PW |
669 | * indirectly via pm_runtime_get*(). Returns -EINVAL if called when |
670 | * the omap_device is already enabled, or passes along the return | |
671 | * value of _omap_device_enable_hwmods(). | |
b04b65ab PW |
672 | */ |
673 | int omap_device_enable(struct platform_device *pdev) | |
674 | { | |
675 | int ret; | |
676 | struct omap_device *od; | |
677 | ||
8f0d69de | 678 | od = to_omap_device(pdev); |
b04b65ab PW |
679 | |
680 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
681 | dev_warn(&pdev->dev, |
682 | "omap_device: %s() called from invalid state %d\n", | |
683 | __func__, od->_state); | |
b04b65ab PW |
684 | return -EINVAL; |
685 | } | |
686 | ||
c1d1cd59 | 687 | ret = _omap_device_enable_hwmods(od); |
b04b65ab | 688 | |
6da23358 PR |
689 | if (ret == 0) |
690 | od->_state = OMAP_DEVICE_STATE_ENABLED; | |
b04b65ab PW |
691 | |
692 | return ret; | |
693 | } | |
694 | ||
695 | /** | |
696 | * omap_device_idle - idle an omap_device | |
697 | * @od: struct omap_device * to idle | |
698 | * | |
c1d1cd59 PW |
699 | * Idle omap_device @od. Device drivers call this function indirectly |
700 | * via pm_runtime_put*(). Returns -EINVAL if the omap_device is not | |
b04b65ab | 701 | * currently enabled, or passes along the return value of |
c1d1cd59 | 702 | * _omap_device_idle_hwmods(). |
b04b65ab PW |
703 | */ |
704 | int omap_device_idle(struct platform_device *pdev) | |
705 | { | |
706 | int ret; | |
707 | struct omap_device *od; | |
708 | ||
8f0d69de | 709 | od = to_omap_device(pdev); |
b04b65ab PW |
710 | |
711 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
712 | dev_warn(&pdev->dev, |
713 | "omap_device: %s() called from invalid state %d\n", | |
714 | __func__, od->_state); | |
b04b65ab PW |
715 | return -EINVAL; |
716 | } | |
717 | ||
c1d1cd59 | 718 | ret = _omap_device_idle_hwmods(od); |
b04b65ab | 719 | |
6da23358 PR |
720 | if (ret == 0) |
721 | od->_state = OMAP_DEVICE_STATE_IDLE; | |
b04b65ab PW |
722 | |
723 | return ret; | |
724 | } | |
725 | ||
8bb9fde2 ORL |
726 | /** |
727 | * omap_device_assert_hardreset - set a device's hardreset line | |
728 | * @pdev: struct platform_device * to reset | |
729 | * @name: const char * name of the reset line | |
730 | * | |
731 | * Set the hardreset line identified by @name on the IP blocks | |
732 | * associated with the hwmods backing the platform_device @pdev. All | |
733 | * of the hwmods associated with @pdev must have the same hardreset | |
734 | * line linked to them for this to work. Passes along the return value | |
735 | * of omap_hwmod_assert_hardreset() in the event of any failure, or | |
736 | * returns 0 upon success. | |
737 | */ | |
738 | int omap_device_assert_hardreset(struct platform_device *pdev, const char *name) | |
739 | { | |
740 | struct omap_device *od = to_omap_device(pdev); | |
741 | int ret = 0; | |
742 | int i; | |
743 | ||
744 | for (i = 0; i < od->hwmods_cnt; i++) { | |
745 | ret = omap_hwmod_assert_hardreset(od->hwmods[i], name); | |
746 | if (ret) | |
747 | break; | |
748 | } | |
749 | ||
750 | return ret; | |
751 | } | |
752 | ||
753 | /** | |
754 | * omap_device_deassert_hardreset - release a device's hardreset line | |
755 | * @pdev: struct platform_device * to reset | |
756 | * @name: const char * name of the reset line | |
757 | * | |
758 | * Release the hardreset line identified by @name on the IP blocks | |
759 | * associated with the hwmods backing the platform_device @pdev. All | |
760 | * of the hwmods associated with @pdev must have the same hardreset | |
761 | * line linked to them for this to work. Passes along the return | |
762 | * value of omap_hwmod_deassert_hardreset() in the event of any | |
763 | * failure, or returns 0 upon success. | |
764 | */ | |
765 | int omap_device_deassert_hardreset(struct platform_device *pdev, | |
766 | const char *name) | |
767 | { | |
768 | struct omap_device *od = to_omap_device(pdev); | |
769 | int ret = 0; | |
770 | int i; | |
771 | ||
772 | for (i = 0; i < od->hwmods_cnt; i++) { | |
773 | ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name); | |
774 | if (ret) | |
775 | break; | |
776 | } | |
777 | ||
778 | return ret; | |
779 | } | |
780 | ||
1f8a7d52 NM |
781 | /** |
782 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | |
783 | * device pointer. | |
784 | * @oh_name: name of the hwmod device | |
785 | * | |
786 | * Returns back a struct device * pointer associated with a hwmod | |
787 | * device represented by a hwmod_name | |
788 | */ | |
789 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | |
790 | { | |
791 | struct omap_hwmod *oh; | |
792 | ||
793 | if (!oh_name) { | |
794 | WARN(1, "%s: no hwmod name!\n", __func__); | |
795 | return ERR_PTR(-EINVAL); | |
796 | } | |
797 | ||
798 | oh = omap_hwmod_lookup(oh_name); | |
857835c6 | 799 | if (!oh) { |
1f8a7d52 NM |
800 | WARN(1, "%s: no hwmod for %s\n", __func__, |
801 | oh_name); | |
857835c6 | 802 | return ERR_PTR(-ENODEV); |
1f8a7d52 | 803 | } |
857835c6 | 804 | if (!oh->od) { |
1f8a7d52 NM |
805 | WARN(1, "%s: no omap_device for %s\n", __func__, |
806 | oh_name); | |
857835c6 | 807 | return ERR_PTR(-ENODEV); |
1f8a7d52 NM |
808 | } |
809 | ||
1f8a7d52 NM |
810 | return &oh->od->pdev->dev; |
811 | } | |
0d5e8252 | 812 | |
dc2d07eb BC |
813 | static struct notifier_block platform_nb = { |
814 | .notifier_call = _omap_device_notifier_call, | |
815 | }; | |
816 | ||
0d5e8252 KH |
817 | static int __init omap_device_init(void) |
818 | { | |
dc2d07eb | 819 | bus_register_notifier(&platform_bus_type, &platform_nb); |
3ec2decb | 820 | return 0; |
0d5e8252 | 821 | } |
8dd5ea72 | 822 | omap_postcore_initcall(omap_device_init); |
9634c8dd KH |
823 | |
824 | /** | |
825 | * omap_device_late_idle - idle devices without drivers | |
826 | * @dev: struct device * associated with omap_device | |
827 | * @data: unused | |
828 | * | |
829 | * Check the driver bound status of this device, and idle it | |
830 | * if there is no driver attached. | |
831 | */ | |
832 | static int __init omap_device_late_idle(struct device *dev, void *data) | |
833 | { | |
834 | struct platform_device *pdev = to_platform_device(dev); | |
835 | struct omap_device *od = to_omap_device(pdev); | |
f66e329d | 836 | int i; |
9634c8dd KH |
837 | |
838 | if (!od) | |
839 | return 0; | |
840 | ||
841 | /* | |
842 | * If omap_device state is enabled, but has no driver bound, | |
843 | * idle it. | |
844 | */ | |
f66e329d RN |
845 | |
846 | /* | |
847 | * Some devices (like memory controllers) are always kept | |
848 | * enabled, and should not be idled even with no drivers. | |
849 | */ | |
850 | for (i = 0; i < od->hwmods_cnt; i++) | |
851 | if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE) | |
852 | return 0; | |
853 | ||
fe8291e8 GS |
854 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER && |
855 | od->_driver_status != BUS_NOTIFY_BIND_DRIVER) { | |
9634c8dd KH |
856 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { |
857 | dev_warn(dev, "%s: enabled but no driver. Idling\n", | |
858 | __func__); | |
859 | omap_device_idle(pdev); | |
860 | } | |
861 | } | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static int __init omap_device_late_init(void) | |
867 | { | |
868 | bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle); | |
4b91f7f3 | 869 | |
9634c8dd KH |
870 | return 0; |
871 | } | |
e7e17c53 | 872 | omap_late_initcall_sync(omap_device_late_init); |