Commit | Line | Data |
---|---|---|
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; | |
695eea3d | 143 | struct resource res; |
dc2d07eb BC |
144 | const char *oh_name; |
145 | int oh_cnt, i, ret = 0; | |
71941002 | 146 | bool device_active = false, skip_pm_domain = false; |
dc2d07eb BC |
147 | |
148 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); | |
c48cd659 | 149 | if (oh_cnt <= 0) { |
5dc06b7e | 150 | dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n"); |
dc2d07eb BC |
151 | return -ENODEV; |
152 | } | |
153 | ||
71941002 TL |
154 | /* SDMA still needs special handling for omap_device_build() */ |
155 | ret = of_property_read_string_index(node, "ti,hwmods", 0, &oh_name); | |
156 | if (!ret && (!strncmp("dma_system", oh_name, 10) || | |
157 | !strncmp("dma", oh_name, 3))) | |
158 | skip_pm_domain = true; | |
159 | ||
695eea3d | 160 | /* Use ti-sysc driver instead of omap_device? */ |
71941002 TL |
161 | if (!skip_pm_domain && |
162 | !omap_hwmod_parse_module_range(NULL, node, &res)) | |
695eea3d TL |
163 | return -ENODEV; |
164 | ||
6396bb22 | 165 | hwmods = kcalloc(oh_cnt, sizeof(struct omap_hwmod *), GFP_KERNEL); |
dc2d07eb BC |
166 | if (!hwmods) { |
167 | ret = -ENOMEM; | |
168 | goto odbfd_exit; | |
169 | } | |
170 | ||
171 | for (i = 0; i < oh_cnt; i++) { | |
172 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); | |
173 | oh = omap_hwmod_lookup(oh_name); | |
174 | if (!oh) { | |
175 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", | |
176 | oh_name); | |
177 | ret = -EINVAL; | |
178 | goto odbfd_exit1; | |
179 | } | |
180 | hwmods[i] = oh; | |
7268032d RN |
181 | if (oh->flags & HWMOD_INIT_NO_IDLE) |
182 | device_active = true; | |
dc2d07eb BC |
183 | } |
184 | ||
c1d1cd59 | 185 | od = omap_device_alloc(pdev, hwmods, oh_cnt); |
4cf9cf89 | 186 | if (IS_ERR(od)) { |
dc2d07eb BC |
187 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", |
188 | oh_name); | |
189 | ret = PTR_ERR(od); | |
190 | goto odbfd_exit1; | |
191 | } | |
192 | ||
3956a1a0 PU |
193 | /* Fix up missing resource names */ |
194 | for (i = 0; i < pdev->num_resources; i++) { | |
195 | struct resource *r = &pdev->resource[i]; | |
196 | ||
197 | if (r->name == NULL) | |
198 | r->name = dev_name(&pdev->dev); | |
199 | } | |
200 | ||
71941002 TL |
201 | if (!skip_pm_domain) { |
202 | dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain); | |
203 | if (device_active) { | |
204 | omap_device_enable(pdev); | |
205 | pm_runtime_set_active(&pdev->dev); | |
206 | } | |
7268032d RN |
207 | } |
208 | ||
dc2d07eb BC |
209 | odbfd_exit1: |
210 | kfree(hwmods); | |
211 | odbfd_exit: | |
f5c33b07 NM |
212 | /* if data/we are at fault.. load up a fail handler */ |
213 | if (ret) | |
989561de | 214 | dev_pm_domain_set(&pdev->dev, &omap_device_fail_pm_domain); |
f5c33b07 | 215 | |
dc2d07eb BC |
216 | return ret; |
217 | } | |
218 | ||
219 | static int _omap_device_notifier_call(struct notifier_block *nb, | |
220 | unsigned long event, void *dev) | |
221 | { | |
222 | struct platform_device *pdev = to_platform_device(dev); | |
e753345b | 223 | struct omap_device *od; |
cf26f113 | 224 | int err; |
dc2d07eb BC |
225 | |
226 | switch (event) { | |
213fa10d | 227 | case BUS_NOTIFY_REMOVED_DEVICE: |
dc2d07eb BC |
228 | if (pdev->archdata.od) |
229 | omap_device_delete(pdev->archdata.od); | |
230 | break; | |
cf26f113 TL |
231 | case BUS_NOTIFY_UNBOUND_DRIVER: |
232 | od = to_omap_device(pdev); | |
233 | if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED)) { | |
234 | dev_info(dev, "enabled after unload, idling\n"); | |
235 | err = omap_device_idle(pdev); | |
236 | if (err) | |
237 | dev_err(dev, "failed to idle\n"); | |
238 | } | |
239 | break; | |
04abaf07 DG |
240 | case BUS_NOTIFY_BIND_DRIVER: |
241 | od = to_omap_device(pdev); | |
242 | if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED) && | |
243 | pm_runtime_status_suspended(dev)) { | |
244 | od->_driver_status = BUS_NOTIFY_BIND_DRIVER; | |
245 | pm_runtime_set_active(dev); | |
246 | } | |
247 | break; | |
e753345b KH |
248 | case BUS_NOTIFY_ADD_DEVICE: |
249 | if (pdev->dev.of_node) | |
250 | omap_device_build_from_dt(pdev); | |
dad12d11 | 251 | omap_auxdata_legacy_init(dev); |
e753345b KH |
252 | /* fall through */ |
253 | default: | |
254 | od = to_omap_device(pdev); | |
255 | if (od) | |
256 | od->_driver_status = event; | |
dc2d07eb BC |
257 | } |
258 | ||
259 | return NOTIFY_DONE; | |
260 | } | |
261 | ||
c1d1cd59 PW |
262 | /** |
263 | * _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods | |
264 | * @od: struct omap_device *od | |
265 | * | |
266 | * Enable all underlying hwmods. Returns 0. | |
267 | */ | |
268 | static int _omap_device_enable_hwmods(struct omap_device *od) | |
269 | { | |
6da23358 | 270 | int ret = 0; |
c1d1cd59 PW |
271 | int i; |
272 | ||
273 | for (i = 0; i < od->hwmods_cnt; i++) | |
6da23358 | 274 | ret |= omap_hwmod_enable(od->hwmods[i]); |
c1d1cd59 | 275 | |
6da23358 | 276 | return ret; |
c1d1cd59 PW |
277 | } |
278 | ||
279 | /** | |
280 | * _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods | |
281 | * @od: struct omap_device *od | |
282 | * | |
283 | * Idle all underlying hwmods. Returns 0. | |
284 | */ | |
285 | static int _omap_device_idle_hwmods(struct omap_device *od) | |
286 | { | |
6da23358 | 287 | int ret = 0; |
c1d1cd59 PW |
288 | int i; |
289 | ||
290 | for (i = 0; i < od->hwmods_cnt; i++) | |
6da23358 | 291 | ret |= omap_hwmod_idle(od->hwmods[i]); |
c1d1cd59 | 292 | |
6da23358 | 293 | return ret; |
c1d1cd59 | 294 | } |
dc2d07eb | 295 | |
b04b65ab PW |
296 | /* Public functions for use by core code */ |
297 | ||
c80705aa KH |
298 | /** |
299 | * omap_device_get_context_loss_count - get lost context count | |
300 | * @od: struct omap_device * | |
301 | * | |
302 | * Using the primary hwmod, query the context loss count for this | |
303 | * device. | |
304 | * | |
305 | * Callers should consider context for this device lost any time this | |
306 | * function returns a value different than the value the caller got | |
307 | * the last time it called this function. | |
308 | * | |
f733e7c0 | 309 | * If any hwmods exist for the omap_device associated with @pdev, |
c80705aa KH |
310 | * return the context loss counter for that hwmod, otherwise return |
311 | * zero. | |
312 | */ | |
fc013873 | 313 | int omap_device_get_context_loss_count(struct platform_device *pdev) |
c80705aa KH |
314 | { |
315 | struct omap_device *od; | |
316 | u32 ret = 0; | |
317 | ||
8f0d69de | 318 | od = to_omap_device(pdev); |
c80705aa KH |
319 | |
320 | if (od->hwmods_cnt) | |
321 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
a4f6cdb0 BC |
326 | /** |
327 | * omap_device_alloc - allocate an omap_device | |
328 | * @pdev: platform_device that will be included in this omap_device | |
329 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
330 | * @pdata: platform_data ptr to associate with the platform_device | |
331 | * @pdata_len: amount of memory pointed to by @pdata | |
a4f6cdb0 BC |
332 | * |
333 | * Convenience function for allocating an omap_device structure and filling | |
c1d1cd59 | 334 | * hwmods, and resources. |
a4f6cdb0 BC |
335 | * |
336 | * Returns an struct omap_device pointer or ERR_PTR() on error; | |
337 | */ | |
993e4fbd | 338 | struct omap_device *omap_device_alloc(struct platform_device *pdev, |
c1d1cd59 | 339 | struct omap_hwmod **ohs, int oh_cnt) |
a4f6cdb0 BC |
340 | { |
341 | int ret = -ENOMEM; | |
342 | struct omap_device *od; | |
c2b84a9b | 343 | int i; |
a4f6cdb0 BC |
344 | struct omap_hwmod **hwmods; |
345 | ||
346 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); | |
347 | if (!od) { | |
348 | ret = -ENOMEM; | |
349 | goto oda_exit1; | |
350 | } | |
351 | od->hwmods_cnt = oh_cnt; | |
352 | ||
353 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
354 | if (!hwmods) | |
355 | goto oda_exit2; | |
356 | ||
357 | od->hwmods = hwmods; | |
358 | od->pdev = pdev; | |
a4f6cdb0 BC |
359 | pdev->archdata.od = od; |
360 | ||
361 | for (i = 0; i < oh_cnt; i++) { | |
362 | hwmods[i]->od = od; | |
363 | _add_hwmod_clocks_clkdev(od, hwmods[i]); | |
364 | } | |
365 | ||
366 | return od; | |
367 | ||
a4f6cdb0 BC |
368 | oda_exit2: |
369 | kfree(od); | |
370 | oda_exit1: | |
371 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); | |
372 | ||
373 | return ERR_PTR(ret); | |
374 | } | |
375 | ||
993e4fbd | 376 | void omap_device_delete(struct omap_device *od) |
a4f6cdb0 | 377 | { |
dc2d07eb BC |
378 | if (!od) |
379 | return; | |
380 | ||
a4f6cdb0 | 381 | od->pdev->archdata.od = NULL; |
a4f6cdb0 BC |
382 | kfree(od->hwmods); |
383 | kfree(od); | |
384 | } | |
385 | ||
d85a2d61 TL |
386 | /** |
387 | * omap_device_copy_resources - Add legacy IO and IRQ resources | |
388 | * @oh: interconnect target module | |
389 | * @pdev: platform device to copy resources to | |
390 | * | |
391 | * We still have legacy DMA and smartreflex needing resources. | |
392 | * Let's populate what they need until we can eventually just | |
393 | * remove this function. Note that there should be no need to | |
394 | * call this from omap_device_build_from_dt(), nor should there | |
395 | * be any need to call it for other devices. | |
396 | */ | |
397 | static int | |
398 | omap_device_copy_resources(struct omap_hwmod *oh, | |
399 | struct platform_device *pdev) | |
400 | { | |
401 | struct device_node *np, *child; | |
402 | struct property *prop; | |
403 | struct resource *res; | |
404 | const char *name; | |
405 | int error, irq = 0; | |
406 | ||
f0c96c6d TL |
407 | if (!oh || !oh->od || !oh->od->pdev) |
408 | return -EINVAL; | |
d85a2d61 TL |
409 | |
410 | np = oh->od->pdev->dev.of_node; | |
411 | if (!np) { | |
412 | error = -ENODEV; | |
413 | goto error; | |
414 | } | |
415 | ||
6396bb22 | 416 | res = kcalloc(2, sizeof(*res), GFP_KERNEL); |
d85a2d61 TL |
417 | if (!res) |
418 | return -ENOMEM; | |
419 | ||
420 | /* Do we have a dts range for the interconnect target module? */ | |
421 | error = omap_hwmod_parse_module_range(oh, np, res); | |
422 | ||
423 | /* No ranges, rely on device reg entry */ | |
424 | if (error) | |
425 | error = of_address_to_resource(np, 0, res); | |
426 | if (error) | |
427 | goto free; | |
428 | ||
429 | /* SmartReflex needs first IO resource name to be "mpu" */ | |
430 | res[0].name = "mpu"; | |
431 | ||
432 | /* | |
433 | * We may have a configured "ti,sysc" interconnect target with a | |
434 | * dts child with the interrupt. If so use the first child's | |
435 | * first interrupt for "ti-hwmods" legacy support. | |
436 | */ | |
437 | of_property_for_each_string(np, "compatible", prop, name) | |
438 | if (!strncmp("ti,sysc-", name, 8)) | |
439 | break; | |
440 | ||
441 | child = of_get_next_available_child(np, NULL); | |
442 | ||
443 | if (name) | |
444 | irq = irq_of_parse_and_map(child, 0); | |
445 | if (!irq) | |
446 | irq = irq_of_parse_and_map(np, 0); | |
552ee302 WY |
447 | if (!irq) { |
448 | error = -EINVAL; | |
d85a2d61 | 449 | goto free; |
552ee302 | 450 | } |
d85a2d61 TL |
451 | |
452 | /* Legacy DMA code needs interrupt name to be "0" */ | |
453 | res[1].start = irq; | |
454 | res[1].end = irq; | |
455 | res[1].flags = IORESOURCE_IRQ; | |
456 | res[1].name = "0"; | |
457 | ||
458 | error = platform_device_add_resources(pdev, res, 2); | |
459 | ||
460 | free: | |
461 | kfree(res); | |
462 | ||
463 | error: | |
464 | WARN(error, "%s: %s device %s failed: %i\n", | |
465 | __func__, oh->name, dev_name(&pdev->dev), | |
466 | error); | |
467 | ||
468 | return error; | |
469 | } | |
470 | ||
b04b65ab PW |
471 | /** |
472 | * omap_device_build - build and register an omap_device with one omap_hwmod | |
473 | * @pdev_name: name of the platform_device driver to use | |
474 | * @pdev_id: this platform_device's connection ID | |
475 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
476 | * @pdata: platform_data ptr to associate with the platform_device | |
477 | * @pdata_len: amount of memory pointed to by @pdata | |
b04b65ab PW |
478 | * |
479 | * Convenience function for building and registering a single | |
480 | * omap_device record, which in turn builds and registers a | |
481 | * platform_device record. See omap_device_build_ss() for more | |
482 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, | |
483 | * passes along the return value of omap_device_build_ss(). | |
484 | */ | |
c1d1cd59 PW |
485 | struct platform_device __init *omap_device_build(const char *pdev_name, |
486 | int pdev_id, | |
487 | struct omap_hwmod *oh, | |
488 | void *pdata, int pdata_len) | |
b04b65ab PW |
489 | { |
490 | int ret = -ENOMEM; | |
d66b3fe4 | 491 | struct platform_device *pdev; |
b04b65ab | 492 | struct omap_device *od; |
b04b65ab | 493 | |
d85a2d61 | 494 | if (!oh || !pdev_name) |
b04b65ab PW |
495 | return ERR_PTR(-EINVAL); |
496 | ||
497 | if (!pdata && pdata_len > 0) | |
498 | return ERR_PTR(-EINVAL); | |
499 | ||
d85a2d61 TL |
500 | if (strncmp(oh->name, "smartreflex", 11) && |
501 | strncmp(oh->name, "dma", 3)) { | |
502 | pr_warn("%s need to update %s to probe with dt\na", | |
503 | __func__, pdev_name); | |
504 | ret = -ENODEV; | |
505 | goto odbs_exit; | |
506 | } | |
507 | ||
d66b3fe4 KH |
508 | pdev = platform_device_alloc(pdev_name, pdev_id); |
509 | if (!pdev) { | |
510 | ret = -ENOMEM; | |
511 | goto odbs_exit; | |
512 | } | |
513 | ||
a4f6cdb0 BC |
514 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
515 | if (pdev->id != -1) | |
516 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
517 | else | |
518 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
b04b65ab | 519 | |
d85a2d61 TL |
520 | /* |
521 | * Must be called before omap_device_alloc() as oh->od | |
522 | * only contains the currently registered omap_device | |
523 | * and will get overwritten by omap_device_alloc(). | |
524 | */ | |
525 | ret = omap_device_copy_resources(oh, pdev); | |
526 | if (ret) | |
527 | goto odbs_exit1; | |
528 | ||
529 | od = omap_device_alloc(pdev, &oh, 1); | |
e9a9bb4e DC |
530 | if (IS_ERR(od)) { |
531 | ret = PTR_ERR(od); | |
d66b3fe4 | 532 | goto odbs_exit1; |
e9a9bb4e | 533 | } |
d66b3fe4 KH |
534 | |
535 | ret = platform_device_add_data(pdev, pdata, pdata_len); | |
49b368a6 | 536 | if (ret) |
a4f6cdb0 | 537 | goto odbs_exit2; |
b04b65ab | 538 | |
c1d1cd59 | 539 | ret = omap_device_register(pdev); |
d66b3fe4 | 540 | if (ret) |
a4f6cdb0 | 541 | goto odbs_exit2; |
06563581 | 542 | |
d66b3fe4 | 543 | return pdev; |
b04b65ab | 544 | |
d66b3fe4 | 545 | odbs_exit2: |
a4f6cdb0 | 546 | omap_device_delete(od); |
d66b3fe4 KH |
547 | odbs_exit1: |
548 | platform_device_put(pdev); | |
549 | odbs_exit: | |
b04b65ab PW |
550 | |
551 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); | |
552 | ||
553 | return ERR_PTR(ret); | |
554 | } | |
555 | ||
bf7c5449 | 556 | #ifdef CONFIG_PM |
638080c3 KH |
557 | static int _od_runtime_suspend(struct device *dev) |
558 | { | |
559 | struct platform_device *pdev = to_platform_device(dev); | |
345f79b3 | 560 | int ret; |
638080c3 | 561 | |
345f79b3 | 562 | ret = pm_generic_runtime_suspend(dev); |
6da23358 PR |
563 | if (ret) |
564 | return ret; | |
345f79b3 | 565 | |
6da23358 | 566 | return omap_device_idle(pdev); |
345f79b3 KH |
567 | } |
568 | ||
638080c3 KH |
569 | static int _od_runtime_resume(struct device *dev) |
570 | { | |
571 | struct platform_device *pdev = to_platform_device(dev); | |
6da23358 | 572 | int ret; |
638080c3 | 573 | |
6da23358 | 574 | ret = omap_device_enable(pdev); |
08c78e9d TL |
575 | if (ret) { |
576 | dev_err(dev, "use pm_runtime_put_sync_suspend() in driver?\n"); | |
6da23358 | 577 | return ret; |
08c78e9d | 578 | } |
345f79b3 KH |
579 | |
580 | return pm_generic_runtime_resume(dev); | |
638080c3 | 581 | } |
f5c33b07 NM |
582 | |
583 | static int _od_fail_runtime_suspend(struct device *dev) | |
584 | { | |
585 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); | |
586 | return -ENODEV; | |
587 | } | |
588 | ||
589 | static int _od_fail_runtime_resume(struct device *dev) | |
590 | { | |
591 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); | |
592 | return -ENODEV; | |
593 | } | |
594 | ||
256a5435 | 595 | #endif |
638080c3 | 596 | |
c03f007a KH |
597 | #ifdef CONFIG_SUSPEND |
598 | static int _od_suspend_noirq(struct device *dev) | |
599 | { | |
600 | struct platform_device *pdev = to_platform_device(dev); | |
601 | struct omap_device *od = to_omap_device(pdev); | |
602 | int ret; | |
603 | ||
72bb6f9b KH |
604 | /* Don't attempt late suspend on a driver that is not bound */ |
605 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) | |
606 | return 0; | |
607 | ||
c03f007a KH |
608 | ret = pm_generic_suspend_noirq(dev); |
609 | ||
610 | if (!ret && !pm_runtime_status_suspended(dev)) { | |
611 | if (pm_generic_runtime_suspend(dev) == 0) { | |
4b7ec5ac | 612 | omap_device_idle(pdev); |
c03f007a KH |
613 | od->flags |= OMAP_DEVICE_SUSPENDED; |
614 | } | |
615 | } | |
616 | ||
617 | return ret; | |
618 | } | |
619 | ||
620 | static int _od_resume_noirq(struct device *dev) | |
621 | { | |
622 | struct platform_device *pdev = to_platform_device(dev); | |
623 | struct omap_device *od = to_omap_device(pdev); | |
624 | ||
3522bf7b | 625 | if (od->flags & OMAP_DEVICE_SUSPENDED) { |
c03f007a | 626 | od->flags &= ~OMAP_DEVICE_SUSPENDED; |
4b7ec5ac | 627 | omap_device_enable(pdev); |
c03f007a KH |
628 | pm_generic_runtime_resume(dev); |
629 | } | |
630 | ||
631 | return pm_generic_resume_noirq(dev); | |
632 | } | |
126caf13 KH |
633 | #else |
634 | #define _od_suspend_noirq NULL | |
635 | #define _od_resume_noirq NULL | |
c03f007a KH |
636 | #endif |
637 | ||
f5c33b07 NM |
638 | struct dev_pm_domain omap_device_fail_pm_domain = { |
639 | .ops = { | |
640 | SET_RUNTIME_PM_OPS(_od_fail_runtime_suspend, | |
641 | _od_fail_runtime_resume, NULL) | |
642 | } | |
643 | }; | |
644 | ||
3ec2decb | 645 | struct dev_pm_domain omap_device_pm_domain = { |
638080c3 | 646 | .ops = { |
256a5435 | 647 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
45f0a85c | 648 | NULL) |
638080c3 | 649 | USE_PLATFORM_PM_SLEEP_OPS |
c381f229 GS |
650 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq, |
651 | _od_resume_noirq) | |
638080c3 KH |
652 | } |
653 | }; | |
654 | ||
b04b65ab PW |
655 | /** |
656 | * omap_device_register - register an omap_device with one omap_hwmod | |
657 | * @od: struct omap_device * to register | |
658 | * | |
659 | * Register the omap_device structure. This currently just calls | |
660 | * platform_device_register() on the underlying platform_device. | |
661 | * Returns the return value of platform_device_register(). | |
662 | */ | |
993e4fbd | 663 | int omap_device_register(struct platform_device *pdev) |
b04b65ab | 664 | { |
bfae4f8f | 665 | pr_debug("omap_device: %s: registering\n", pdev->name); |
b04b65ab | 666 | |
989561de | 667 | dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain); |
d66b3fe4 | 668 | return platform_device_add(pdev); |
b04b65ab PW |
669 | } |
670 | ||
671 | ||
672 | /* Public functions for use by device drivers through struct platform_data */ | |
673 | ||
674 | /** | |
675 | * omap_device_enable - fully activate an omap_device | |
676 | * @od: struct omap_device * to activate | |
677 | * | |
678 | * Do whatever is necessary for the hwmods underlying omap_device @od | |
679 | * to be accessible and ready to operate. This generally involves | |
680 | * enabling clocks, setting SYSCONFIG registers; and in the future may | |
681 | * involve remuxing pins. Device drivers should call this function | |
c1d1cd59 PW |
682 | * indirectly via pm_runtime_get*(). Returns -EINVAL if called when |
683 | * the omap_device is already enabled, or passes along the return | |
684 | * value of _omap_device_enable_hwmods(). | |
b04b65ab PW |
685 | */ |
686 | int omap_device_enable(struct platform_device *pdev) | |
687 | { | |
688 | int ret; | |
689 | struct omap_device *od; | |
690 | ||
8f0d69de | 691 | od = to_omap_device(pdev); |
b04b65ab PW |
692 | |
693 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
694 | dev_warn(&pdev->dev, |
695 | "omap_device: %s() called from invalid state %d\n", | |
696 | __func__, od->_state); | |
b04b65ab PW |
697 | return -EINVAL; |
698 | } | |
699 | ||
c1d1cd59 | 700 | ret = _omap_device_enable_hwmods(od); |
b04b65ab | 701 | |
6da23358 PR |
702 | if (ret == 0) |
703 | od->_state = OMAP_DEVICE_STATE_ENABLED; | |
b04b65ab PW |
704 | |
705 | return ret; | |
706 | } | |
707 | ||
708 | /** | |
709 | * omap_device_idle - idle an omap_device | |
710 | * @od: struct omap_device * to idle | |
711 | * | |
c1d1cd59 PW |
712 | * Idle omap_device @od. Device drivers call this function indirectly |
713 | * via pm_runtime_put*(). Returns -EINVAL if the omap_device is not | |
b04b65ab | 714 | * currently enabled, or passes along the return value of |
c1d1cd59 | 715 | * _omap_device_idle_hwmods(). |
b04b65ab PW |
716 | */ |
717 | int omap_device_idle(struct platform_device *pdev) | |
718 | { | |
719 | int ret; | |
720 | struct omap_device *od; | |
721 | ||
8f0d69de | 722 | od = to_omap_device(pdev); |
b04b65ab PW |
723 | |
724 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
725 | dev_warn(&pdev->dev, |
726 | "omap_device: %s() called from invalid state %d\n", | |
727 | __func__, od->_state); | |
b04b65ab PW |
728 | return -EINVAL; |
729 | } | |
730 | ||
c1d1cd59 | 731 | ret = _omap_device_idle_hwmods(od); |
b04b65ab | 732 | |
6da23358 PR |
733 | if (ret == 0) |
734 | od->_state = OMAP_DEVICE_STATE_IDLE; | |
b04b65ab PW |
735 | |
736 | return ret; | |
737 | } | |
738 | ||
8bb9fde2 ORL |
739 | /** |
740 | * omap_device_assert_hardreset - set a device's hardreset line | |
741 | * @pdev: struct platform_device * to reset | |
742 | * @name: const char * name of the reset line | |
743 | * | |
744 | * Set the hardreset line identified by @name on the IP blocks | |
745 | * associated with the hwmods backing the platform_device @pdev. All | |
746 | * of the hwmods associated with @pdev must have the same hardreset | |
747 | * line linked to them for this to work. Passes along the return value | |
748 | * of omap_hwmod_assert_hardreset() in the event of any failure, or | |
749 | * returns 0 upon success. | |
750 | */ | |
751 | int omap_device_assert_hardreset(struct platform_device *pdev, const char *name) | |
752 | { | |
753 | struct omap_device *od = to_omap_device(pdev); | |
754 | int ret = 0; | |
755 | int i; | |
756 | ||
757 | for (i = 0; i < od->hwmods_cnt; i++) { | |
758 | ret = omap_hwmod_assert_hardreset(od->hwmods[i], name); | |
759 | if (ret) | |
760 | break; | |
761 | } | |
762 | ||
763 | return ret; | |
764 | } | |
765 | ||
766 | /** | |
767 | * omap_device_deassert_hardreset - release a device's hardreset line | |
768 | * @pdev: struct platform_device * to reset | |
769 | * @name: const char * name of the reset line | |
770 | * | |
771 | * Release the hardreset line identified by @name on the IP blocks | |
772 | * associated with the hwmods backing the platform_device @pdev. All | |
773 | * of the hwmods associated with @pdev must have the same hardreset | |
774 | * line linked to them for this to work. Passes along the return | |
775 | * value of omap_hwmod_deassert_hardreset() in the event of any | |
776 | * failure, or returns 0 upon success. | |
777 | */ | |
778 | int omap_device_deassert_hardreset(struct platform_device *pdev, | |
779 | const char *name) | |
780 | { | |
781 | struct omap_device *od = to_omap_device(pdev); | |
782 | int ret = 0; | |
783 | int i; | |
784 | ||
785 | for (i = 0; i < od->hwmods_cnt; i++) { | |
786 | ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name); | |
787 | if (ret) | |
788 | break; | |
789 | } | |
790 | ||
791 | return ret; | |
792 | } | |
793 | ||
1f8a7d52 NM |
794 | /** |
795 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | |
796 | * device pointer. | |
797 | * @oh_name: name of the hwmod device | |
798 | * | |
799 | * Returns back a struct device * pointer associated with a hwmod | |
800 | * device represented by a hwmod_name | |
801 | */ | |
802 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | |
803 | { | |
804 | struct omap_hwmod *oh; | |
805 | ||
806 | if (!oh_name) { | |
807 | WARN(1, "%s: no hwmod name!\n", __func__); | |
808 | return ERR_PTR(-EINVAL); | |
809 | } | |
810 | ||
811 | oh = omap_hwmod_lookup(oh_name); | |
857835c6 | 812 | if (!oh) { |
1f8a7d52 NM |
813 | WARN(1, "%s: no hwmod for %s\n", __func__, |
814 | oh_name); | |
857835c6 | 815 | return ERR_PTR(-ENODEV); |
1f8a7d52 | 816 | } |
857835c6 | 817 | if (!oh->od) { |
1f8a7d52 NM |
818 | WARN(1, "%s: no omap_device for %s\n", __func__, |
819 | oh_name); | |
857835c6 | 820 | return ERR_PTR(-ENODEV); |
1f8a7d52 NM |
821 | } |
822 | ||
1f8a7d52 NM |
823 | return &oh->od->pdev->dev; |
824 | } | |
0d5e8252 | 825 | |
dc2d07eb BC |
826 | static struct notifier_block platform_nb = { |
827 | .notifier_call = _omap_device_notifier_call, | |
828 | }; | |
829 | ||
0d5e8252 KH |
830 | static int __init omap_device_init(void) |
831 | { | |
dc2d07eb | 832 | bus_register_notifier(&platform_bus_type, &platform_nb); |
3ec2decb | 833 | return 0; |
0d5e8252 | 834 | } |
8dd5ea72 | 835 | omap_postcore_initcall(omap_device_init); |
9634c8dd KH |
836 | |
837 | /** | |
838 | * omap_device_late_idle - idle devices without drivers | |
839 | * @dev: struct device * associated with omap_device | |
840 | * @data: unused | |
841 | * | |
842 | * Check the driver bound status of this device, and idle it | |
843 | * if there is no driver attached. | |
844 | */ | |
845 | static int __init omap_device_late_idle(struct device *dev, void *data) | |
846 | { | |
847 | struct platform_device *pdev = to_platform_device(dev); | |
848 | struct omap_device *od = to_omap_device(pdev); | |
f66e329d | 849 | int i; |
9634c8dd KH |
850 | |
851 | if (!od) | |
852 | return 0; | |
853 | ||
854 | /* | |
855 | * If omap_device state is enabled, but has no driver bound, | |
856 | * idle it. | |
857 | */ | |
f66e329d RN |
858 | |
859 | /* | |
860 | * Some devices (like memory controllers) are always kept | |
861 | * enabled, and should not be idled even with no drivers. | |
862 | */ | |
863 | for (i = 0; i < od->hwmods_cnt; i++) | |
864 | if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE) | |
865 | return 0; | |
866 | ||
fe8291e8 GS |
867 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER && |
868 | od->_driver_status != BUS_NOTIFY_BIND_DRIVER) { | |
9634c8dd KH |
869 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { |
870 | dev_warn(dev, "%s: enabled but no driver. Idling\n", | |
871 | __func__); | |
872 | omap_device_idle(pdev); | |
873 | } | |
874 | } | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
879 | static int __init omap_device_late_init(void) | |
880 | { | |
881 | bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle); | |
4b91f7f3 | 882 | |
9634c8dd KH |
883 | return 0; |
884 | } | |
e7e17c53 | 885 | omap_late_initcall_sync(omap_device_late_init); |