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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 BC |
37 | #include <linux/of.h> |
38 | #include <linux/notifier.h> | |
b04b65ab | 39 | |
dad12d11 | 40 | #include "common.h" |
b76c8b19 | 41 | #include "soc.h" |
25c7d49e | 42 | #include "omap_device.h" |
2a296c8f | 43 | #include "omap_hwmod.h" |
b04b65ab | 44 | |
b04b65ab PW |
45 | /* Private functions */ |
46 | ||
bf1e0776 BC |
47 | static void _add_clkdev(struct omap_device *od, const char *clk_alias, |
48 | const char *clk_name) | |
49 | { | |
50 | struct clk *r; | |
1ca90bd4 | 51 | int rc; |
bf1e0776 BC |
52 | |
53 | if (!clk_alias || !clk_name) | |
54 | return; | |
55 | ||
d66b3fe4 | 56 | dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name); |
bf1e0776 | 57 | |
d66b3fe4 | 58 | r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias); |
bf1e0776 | 59 | if (!IS_ERR(r)) { |
9a02ae4e | 60 | dev_dbg(&od->pdev->dev, |
49882c99 | 61 | "alias %s already exists\n", clk_alias); |
bf1e0776 BC |
62 | clk_put(r); |
63 | return; | |
64 | } | |
65 | ||
59dcfc48 TK |
66 | r = clk_get_sys(NULL, clk_name); |
67 | ||
68 | if (IS_ERR(r) && of_have_populated_dt()) { | |
69 | struct of_phandle_args clkspec; | |
70 | ||
71 | clkspec.np = of_find_node_by_name(NULL, clk_name); | |
72 | ||
73 | r = of_clk_get_from_provider(&clkspec); | |
74 | ||
75 | rc = clk_register_clkdev(r, clk_alias, | |
76 | dev_name(&od->pdev->dev)); | |
77 | } else { | |
78 | rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev), | |
79 | clk_name, NULL); | |
80 | } | |
81 | ||
1ca90bd4 RK |
82 | if (rc) { |
83 | if (rc == -ENODEV || rc == -ENOMEM) | |
84 | dev_err(&od->pdev->dev, | |
85 | "clkdev_alloc for %s failed\n", clk_alias); | |
86 | else | |
87 | dev_err(&od->pdev->dev, | |
88 | "clk_get for %s failed\n", clk_name); | |
bf1e0776 | 89 | } |
bf1e0776 BC |
90 | } |
91 | ||
4ef7aca8 | 92 | /** |
bf1e0776 BC |
93 | * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks |
94 | * and main clock | |
4ef7aca8 | 95 | * @od: struct omap_device *od |
bf1e0776 | 96 | * @oh: struct omap_hwmod *oh |
4ef7aca8 | 97 | * |
bf1e0776 BC |
98 | * For the main clock and every optional clock present per hwmod per |
99 | * omap_device, this function adds an entry in the clkdev table of the | |
100 | * form <dev-id=dev_name, con-id=role> if it does not exist already. | |
4ef7aca8 PB |
101 | * |
102 | * The function is called from inside omap_device_build_ss(), after | |
103 | * omap_device_register. | |
104 | * | |
105 | * This allows drivers to get a pointer to its optional clocks based on its role | |
106 | * by calling clk_get(<dev*>, <role>). | |
bf1e0776 | 107 | * In the case of the main clock, a "fck" alias is used. |
4ef7aca8 PB |
108 | * |
109 | * No return value. | |
110 | */ | |
bf1e0776 BC |
111 | static void _add_hwmod_clocks_clkdev(struct omap_device *od, |
112 | struct omap_hwmod *oh) | |
4ef7aca8 PB |
113 | { |
114 | int i; | |
115 | ||
bf1e0776 | 116 | _add_clkdev(od, "fck", oh->main_clk); |
da0653fe | 117 | |
bf1e0776 BC |
118 | for (i = 0; i < oh->opt_clks_cnt; i++) |
119 | _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk); | |
4ef7aca8 PB |
120 | } |
121 | ||
b04b65ab | 122 | |
dc2d07eb BC |
123 | /** |
124 | * omap_device_build_from_dt - build an omap_device with multiple hwmods | |
125 | * @pdev_name: name of the platform_device driver to use | |
126 | * @pdev_id: this platform_device's connection ID | |
127 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
128 | * @pdata: platform_data ptr to associate with the platform_device | |
129 | * @pdata_len: amount of memory pointed to by @pdata | |
dc2d07eb BC |
130 | * |
131 | * Function for building an omap_device already registered from device-tree | |
132 | * | |
133 | * Returns 0 or PTR_ERR() on error. | |
134 | */ | |
135 | static int omap_device_build_from_dt(struct platform_device *pdev) | |
136 | { | |
137 | struct omap_hwmod **hwmods; | |
138 | struct omap_device *od; | |
139 | struct omap_hwmod *oh; | |
140 | struct device_node *node = pdev->dev.of_node; | |
141 | const char *oh_name; | |
142 | int oh_cnt, i, ret = 0; | |
7268032d | 143 | bool device_active = false; |
dc2d07eb BC |
144 | |
145 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); | |
c48cd659 | 146 | if (oh_cnt <= 0) { |
5dc06b7e | 147 | dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n"); |
dc2d07eb BC |
148 | return -ENODEV; |
149 | } | |
150 | ||
151 | hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
152 | if (!hwmods) { | |
153 | ret = -ENOMEM; | |
154 | goto odbfd_exit; | |
155 | } | |
156 | ||
157 | for (i = 0; i < oh_cnt; i++) { | |
158 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); | |
159 | oh = omap_hwmod_lookup(oh_name); | |
160 | if (!oh) { | |
161 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", | |
162 | oh_name); | |
163 | ret = -EINVAL; | |
164 | goto odbfd_exit1; | |
165 | } | |
166 | hwmods[i] = oh; | |
7268032d RN |
167 | if (oh->flags & HWMOD_INIT_NO_IDLE) |
168 | device_active = true; | |
dc2d07eb BC |
169 | } |
170 | ||
c1d1cd59 | 171 | od = omap_device_alloc(pdev, hwmods, oh_cnt); |
4cf9cf89 | 172 | if (IS_ERR(od)) { |
dc2d07eb BC |
173 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", |
174 | oh_name); | |
175 | ret = PTR_ERR(od); | |
176 | goto odbfd_exit1; | |
177 | } | |
178 | ||
3956a1a0 PU |
179 | /* Fix up missing resource names */ |
180 | for (i = 0; i < pdev->num_resources; i++) { | |
181 | struct resource *r = &pdev->resource[i]; | |
182 | ||
183 | if (r->name == NULL) | |
184 | r->name = dev_name(&pdev->dev); | |
185 | } | |
186 | ||
989561de | 187 | dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain); |
dc2d07eb | 188 | |
7268032d RN |
189 | if (device_active) { |
190 | omap_device_enable(pdev); | |
191 | pm_runtime_set_active(&pdev->dev); | |
192 | } | |
193 | ||
dc2d07eb BC |
194 | odbfd_exit1: |
195 | kfree(hwmods); | |
196 | odbfd_exit: | |
f5c33b07 NM |
197 | /* if data/we are at fault.. load up a fail handler */ |
198 | if (ret) | |
989561de | 199 | dev_pm_domain_set(&pdev->dev, &omap_device_fail_pm_domain); |
f5c33b07 | 200 | |
dc2d07eb BC |
201 | return ret; |
202 | } | |
203 | ||
204 | static int _omap_device_notifier_call(struct notifier_block *nb, | |
205 | unsigned long event, void *dev) | |
206 | { | |
207 | struct platform_device *pdev = to_platform_device(dev); | |
e753345b | 208 | struct omap_device *od; |
cf26f113 | 209 | int err; |
dc2d07eb BC |
210 | |
211 | switch (event) { | |
213fa10d | 212 | case BUS_NOTIFY_REMOVED_DEVICE: |
dc2d07eb BC |
213 | if (pdev->archdata.od) |
214 | omap_device_delete(pdev->archdata.od); | |
215 | break; | |
cf26f113 TL |
216 | case BUS_NOTIFY_UNBOUND_DRIVER: |
217 | od = to_omap_device(pdev); | |
218 | if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED)) { | |
219 | dev_info(dev, "enabled after unload, idling\n"); | |
220 | err = omap_device_idle(pdev); | |
221 | if (err) | |
222 | dev_err(dev, "failed to idle\n"); | |
223 | } | |
224 | break; | |
04abaf07 DG |
225 | case BUS_NOTIFY_BIND_DRIVER: |
226 | od = to_omap_device(pdev); | |
227 | if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED) && | |
228 | pm_runtime_status_suspended(dev)) { | |
229 | od->_driver_status = BUS_NOTIFY_BIND_DRIVER; | |
230 | pm_runtime_set_active(dev); | |
231 | } | |
232 | break; | |
e753345b KH |
233 | case BUS_NOTIFY_ADD_DEVICE: |
234 | if (pdev->dev.of_node) | |
235 | omap_device_build_from_dt(pdev); | |
dad12d11 | 236 | omap_auxdata_legacy_init(dev); |
e753345b KH |
237 | /* fall through */ |
238 | default: | |
239 | od = to_omap_device(pdev); | |
240 | if (od) | |
241 | od->_driver_status = event; | |
dc2d07eb BC |
242 | } |
243 | ||
244 | return NOTIFY_DONE; | |
245 | } | |
246 | ||
c1d1cd59 PW |
247 | /** |
248 | * _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods | |
249 | * @od: struct omap_device *od | |
250 | * | |
251 | * Enable all underlying hwmods. Returns 0. | |
252 | */ | |
253 | static int _omap_device_enable_hwmods(struct omap_device *od) | |
254 | { | |
6da23358 | 255 | int ret = 0; |
c1d1cd59 PW |
256 | int i; |
257 | ||
258 | for (i = 0; i < od->hwmods_cnt; i++) | |
6da23358 | 259 | ret |= omap_hwmod_enable(od->hwmods[i]); |
c1d1cd59 | 260 | |
6da23358 | 261 | return ret; |
c1d1cd59 PW |
262 | } |
263 | ||
264 | /** | |
265 | * _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods | |
266 | * @od: struct omap_device *od | |
267 | * | |
268 | * Idle all underlying hwmods. Returns 0. | |
269 | */ | |
270 | static int _omap_device_idle_hwmods(struct omap_device *od) | |
271 | { | |
6da23358 | 272 | int ret = 0; |
c1d1cd59 PW |
273 | int i; |
274 | ||
275 | for (i = 0; i < od->hwmods_cnt; i++) | |
6da23358 | 276 | ret |= omap_hwmod_idle(od->hwmods[i]); |
c1d1cd59 | 277 | |
6da23358 | 278 | return ret; |
c1d1cd59 | 279 | } |
dc2d07eb | 280 | |
b04b65ab PW |
281 | /* Public functions for use by core code */ |
282 | ||
c80705aa KH |
283 | /** |
284 | * omap_device_get_context_loss_count - get lost context count | |
285 | * @od: struct omap_device * | |
286 | * | |
287 | * Using the primary hwmod, query the context loss count for this | |
288 | * device. | |
289 | * | |
290 | * Callers should consider context for this device lost any time this | |
291 | * function returns a value different than the value the caller got | |
292 | * the last time it called this function. | |
293 | * | |
f733e7c0 | 294 | * If any hwmods exist for the omap_device associated with @pdev, |
c80705aa KH |
295 | * return the context loss counter for that hwmod, otherwise return |
296 | * zero. | |
297 | */ | |
fc013873 | 298 | int omap_device_get_context_loss_count(struct platform_device *pdev) |
c80705aa KH |
299 | { |
300 | struct omap_device *od; | |
301 | u32 ret = 0; | |
302 | ||
8f0d69de | 303 | od = to_omap_device(pdev); |
c80705aa KH |
304 | |
305 | if (od->hwmods_cnt) | |
306 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); | |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
b04b65ab PW |
311 | /** |
312 | * omap_device_count_resources - count number of struct resource entries needed | |
313 | * @od: struct omap_device * | |
dad4191d | 314 | * @flags: Type of resources to include when counting (IRQ/DMA/MEM) |
b04b65ab PW |
315 | * |
316 | * Count the number of struct resource entries needed for this | |
317 | * omap_device @od. Used by omap_device_build_ss() to determine how | |
318 | * much memory to allocate before calling | |
319 | * omap_device_fill_resources(). Returns the count. | |
320 | */ | |
dad4191d PU |
321 | static int omap_device_count_resources(struct omap_device *od, |
322 | unsigned long flags) | |
b04b65ab | 323 | { |
b04b65ab PW |
324 | int c = 0; |
325 | int i; | |
326 | ||
f39f4898 | 327 | for (i = 0; i < od->hwmods_cnt; i++) |
dad4191d | 328 | c += omap_hwmod_count_resources(od->hwmods[i], flags); |
b04b65ab | 329 | |
7852ec05 PW |
330 | pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n", |
331 | od->pdev->name, c, od->hwmods_cnt); | |
b04b65ab PW |
332 | |
333 | return c; | |
334 | } | |
335 | ||
336 | /** | |
337 | * omap_device_fill_resources - fill in array of struct resource | |
338 | * @od: struct omap_device * | |
339 | * @res: pointer to an array of struct resource to be filled in | |
340 | * | |
341 | * Populate one or more empty struct resource pointed to by @res with | |
342 | * the resource data for this omap_device @od. Used by | |
343 | * omap_device_build_ss() after calling omap_device_count_resources(). | |
344 | * Ideally this function would not be needed at all. If omap_device | |
345 | * replaces platform_device, then we can specify our own | |
346 | * get_resource()/ get_irq()/etc functions that use the underlying | |
347 | * omap_hwmod information. Or if platform_device is extended to use | |
348 | * subarchitecture-specific function pointers, the various | |
349 | * platform_device functions can simply call omap_device internal | |
350 | * functions to get device resources. Hacking around the existing | |
351 | * platform_device code wastes memory. Returns 0. | |
352 | */ | |
a2a28ad9 KH |
353 | static int omap_device_fill_resources(struct omap_device *od, |
354 | struct resource *res) | |
b04b65ab | 355 | { |
b04b65ab PW |
356 | int i, r; |
357 | ||
f39f4898 KVA |
358 | for (i = 0; i < od->hwmods_cnt; i++) { |
359 | r = omap_hwmod_fill_resources(od->hwmods[i], res); | |
b04b65ab | 360 | res += r; |
b04b65ab PW |
361 | } |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
b82b04e8 VH |
366 | /** |
367 | * _od_fill_dma_resources - fill in array of struct resource with dma resources | |
368 | * @od: struct omap_device * | |
369 | * @res: pointer to an array of struct resource to be filled in | |
370 | * | |
371 | * Populate one or more empty struct resource pointed to by @res with | |
372 | * the dma resource data for this omap_device @od. Used by | |
373 | * omap_device_alloc() after calling omap_device_count_resources(). | |
374 | * | |
375 | * Ideally this function would not be needed at all. If we have | |
376 | * mechanism to get dma resources from DT. | |
377 | * | |
378 | * Returns 0. | |
379 | */ | |
380 | static int _od_fill_dma_resources(struct omap_device *od, | |
381 | struct resource *res) | |
382 | { | |
383 | int i, r; | |
384 | ||
385 | for (i = 0; i < od->hwmods_cnt; i++) { | |
386 | r = omap_hwmod_fill_dma_resources(od->hwmods[i], res); | |
387 | res += r; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
a4f6cdb0 BC |
393 | /** |
394 | * omap_device_alloc - allocate an omap_device | |
395 | * @pdev: platform_device that will be included in this omap_device | |
396 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
397 | * @pdata: platform_data ptr to associate with the platform_device | |
398 | * @pdata_len: amount of memory pointed to by @pdata | |
a4f6cdb0 BC |
399 | * |
400 | * Convenience function for allocating an omap_device structure and filling | |
c1d1cd59 | 401 | * hwmods, and resources. |
a4f6cdb0 BC |
402 | * |
403 | * Returns an struct omap_device pointer or ERR_PTR() on error; | |
404 | */ | |
993e4fbd | 405 | struct omap_device *omap_device_alloc(struct platform_device *pdev, |
c1d1cd59 | 406 | struct omap_hwmod **ohs, int oh_cnt) |
a4f6cdb0 BC |
407 | { |
408 | int ret = -ENOMEM; | |
409 | struct omap_device *od; | |
410 | struct resource *res = NULL; | |
411 | int i, res_count; | |
412 | struct omap_hwmod **hwmods; | |
413 | ||
414 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); | |
415 | if (!od) { | |
416 | ret = -ENOMEM; | |
417 | goto oda_exit1; | |
418 | } | |
419 | od->hwmods_cnt = oh_cnt; | |
420 | ||
421 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
422 | if (!hwmods) | |
423 | goto oda_exit2; | |
424 | ||
425 | od->hwmods = hwmods; | |
426 | od->pdev = pdev; | |
427 | ||
428 | /* | |
c567b058 PU |
429 | * Non-DT Boot: |
430 | * Here, pdev->num_resources = 0, and we should get all the | |
431 | * resources from hwmod. | |
432 | * | |
b82b04e8 VH |
433 | * DT Boot: |
434 | * OF framework will construct the resource structure (currently | |
435 | * does for MEM & IRQ resource) and we should respect/use these | |
436 | * resources, killing hwmod dependency. | |
437 | * If pdev->num_resources > 0, we assume that MEM & IRQ resources | |
438 | * have been allocated by OF layer already (through DTB). | |
c567b058 PU |
439 | * As preparation for the future we examine the OF provided resources |
440 | * to see if we have DMA resources provided already. In this case | |
441 | * there is no need to update the resources for the device, we use the | |
442 | * OF provided ones. | |
b82b04e8 VH |
443 | * |
444 | * TODO: Once DMA resource is available from OF layer, we should | |
445 | * kill filling any resources from hwmod. | |
a4f6cdb0 | 446 | */ |
c567b058 PU |
447 | if (!pdev->num_resources) { |
448 | /* Count all resources for the device */ | |
449 | res_count = omap_device_count_resources(od, IORESOURCE_IRQ | | |
450 | IORESOURCE_DMA | | |
451 | IORESOURCE_MEM); | |
452 | } else { | |
453 | /* Take a look if we already have DMA resource via DT */ | |
454 | for (i = 0; i < pdev->num_resources; i++) { | |
455 | struct resource *r = &pdev->resource[i]; | |
456 | ||
457 | /* We have it, no need to touch the resources */ | |
458 | if (r->flags == IORESOURCE_DMA) | |
459 | goto have_everything; | |
b82b04e8 | 460 | } |
c567b058 PU |
461 | /* Count only DMA resources for the device */ |
462 | res_count = omap_device_count_resources(od, IORESOURCE_DMA); | |
463 | /* The device has no DMA resource, no need for update */ | |
464 | if (!res_count) | |
465 | goto have_everything; | |
a4f6cdb0 | 466 | |
c567b058 PU |
467 | res_count += pdev->num_resources; |
468 | } | |
a4f6cdb0 | 469 | |
c567b058 PU |
470 | /* Allocate resources memory to account for new resources */ |
471 | res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL); | |
472 | if (!res) | |
473 | goto oda_exit3; | |
474 | ||
475 | if (!pdev->num_resources) { | |
476 | dev_dbg(&pdev->dev, "%s: using %d resources from hwmod\n", | |
477 | __func__, res_count); | |
478 | omap_device_fill_resources(od, res); | |
479 | } else { | |
480 | dev_dbg(&pdev->dev, | |
481 | "%s: appending %d DMA resources from hwmod\n", | |
482 | __func__, res_count - pdev->num_resources); | |
483 | memcpy(res, pdev->resource, | |
484 | sizeof(struct resource) * pdev->num_resources); | |
485 | _od_fill_dma_resources(od, &res[pdev->num_resources]); | |
a4f6cdb0 BC |
486 | } |
487 | ||
c567b058 PU |
488 | ret = platform_device_add_resources(pdev, res, res_count); |
489 | kfree(res); | |
490 | ||
491 | if (ret) | |
492 | goto oda_exit3; | |
493 | ||
494 | have_everything: | |
a4f6cdb0 BC |
495 | pdev->archdata.od = od; |
496 | ||
497 | for (i = 0; i < oh_cnt; i++) { | |
498 | hwmods[i]->od = od; | |
499 | _add_hwmod_clocks_clkdev(od, hwmods[i]); | |
500 | } | |
501 | ||
502 | return od; | |
503 | ||
504 | oda_exit3: | |
505 | kfree(hwmods); | |
506 | oda_exit2: | |
507 | kfree(od); | |
508 | oda_exit1: | |
509 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); | |
510 | ||
511 | return ERR_PTR(ret); | |
512 | } | |
513 | ||
993e4fbd | 514 | void omap_device_delete(struct omap_device *od) |
a4f6cdb0 | 515 | { |
dc2d07eb BC |
516 | if (!od) |
517 | return; | |
518 | ||
a4f6cdb0 | 519 | od->pdev->archdata.od = NULL; |
a4f6cdb0 BC |
520 | kfree(od->hwmods); |
521 | kfree(od); | |
522 | } | |
523 | ||
b04b65ab PW |
524 | /** |
525 | * omap_device_build - build and register an omap_device with one omap_hwmod | |
526 | * @pdev_name: name of the platform_device driver to use | |
527 | * @pdev_id: this platform_device's connection ID | |
528 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
529 | * @pdata: platform_data ptr to associate with the platform_device | |
530 | * @pdata_len: amount of memory pointed to by @pdata | |
b04b65ab PW |
531 | * |
532 | * Convenience function for building and registering a single | |
533 | * omap_device record, which in turn builds and registers a | |
534 | * platform_device record. See omap_device_build_ss() for more | |
535 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, | |
536 | * passes along the return value of omap_device_build_ss(). | |
537 | */ | |
c1d1cd59 PW |
538 | struct platform_device __init *omap_device_build(const char *pdev_name, |
539 | int pdev_id, | |
540 | struct omap_hwmod *oh, | |
541 | void *pdata, int pdata_len) | |
b04b65ab PW |
542 | { |
543 | struct omap_hwmod *ohs[] = { oh }; | |
544 | ||
545 | if (!oh) | |
546 | return ERR_PTR(-EINVAL); | |
547 | ||
548 | return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata, | |
c1d1cd59 | 549 | pdata_len); |
b04b65ab PW |
550 | } |
551 | ||
552 | /** | |
553 | * omap_device_build_ss - build and register an omap_device with multiple hwmods | |
554 | * @pdev_name: name of the platform_device driver to use | |
555 | * @pdev_id: this platform_device's connection ID | |
556 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
557 | * @pdata: platform_data ptr to associate with the platform_device | |
558 | * @pdata_len: amount of memory pointed to by @pdata | |
b04b65ab PW |
559 | * |
560 | * Convenience function for building and registering an omap_device | |
561 | * subsystem record. Subsystem records consist of multiple | |
562 | * omap_hwmods. This function in turn builds and registers a | |
563 | * platform_device record. Returns an ERR_PTR() on error, or passes | |
564 | * along the return value of omap_device_register(). | |
565 | */ | |
c1d1cd59 PW |
566 | struct platform_device __init *omap_device_build_ss(const char *pdev_name, |
567 | int pdev_id, | |
568 | struct omap_hwmod **ohs, | |
569 | int oh_cnt, void *pdata, | |
570 | int pdata_len) | |
b04b65ab PW |
571 | { |
572 | int ret = -ENOMEM; | |
d66b3fe4 | 573 | struct platform_device *pdev; |
b04b65ab | 574 | struct omap_device *od; |
b04b65ab PW |
575 | |
576 | if (!ohs || oh_cnt == 0 || !pdev_name) | |
577 | return ERR_PTR(-EINVAL); | |
578 | ||
579 | if (!pdata && pdata_len > 0) | |
580 | return ERR_PTR(-EINVAL); | |
581 | ||
d66b3fe4 KH |
582 | pdev = platform_device_alloc(pdev_name, pdev_id); |
583 | if (!pdev) { | |
584 | ret = -ENOMEM; | |
585 | goto odbs_exit; | |
586 | } | |
587 | ||
a4f6cdb0 BC |
588 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
589 | if (pdev->id != -1) | |
590 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
591 | else | |
592 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
b04b65ab | 593 | |
c1d1cd59 | 594 | od = omap_device_alloc(pdev, ohs, oh_cnt); |
a87e6628 | 595 | if (IS_ERR(od)) |
d66b3fe4 | 596 | goto odbs_exit1; |
d66b3fe4 KH |
597 | |
598 | ret = platform_device_add_data(pdev, pdata, pdata_len); | |
49b368a6 | 599 | if (ret) |
a4f6cdb0 | 600 | goto odbs_exit2; |
b04b65ab | 601 | |
c1d1cd59 | 602 | ret = omap_device_register(pdev); |
d66b3fe4 | 603 | if (ret) |
a4f6cdb0 | 604 | goto odbs_exit2; |
06563581 | 605 | |
d66b3fe4 | 606 | return pdev; |
b04b65ab | 607 | |
d66b3fe4 | 608 | odbs_exit2: |
a4f6cdb0 | 609 | omap_device_delete(od); |
d66b3fe4 KH |
610 | odbs_exit1: |
611 | platform_device_put(pdev); | |
612 | odbs_exit: | |
b04b65ab PW |
613 | |
614 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); | |
615 | ||
616 | return ERR_PTR(ret); | |
617 | } | |
618 | ||
bf7c5449 | 619 | #ifdef CONFIG_PM |
638080c3 KH |
620 | static int _od_runtime_suspend(struct device *dev) |
621 | { | |
622 | struct platform_device *pdev = to_platform_device(dev); | |
345f79b3 | 623 | int ret; |
638080c3 | 624 | |
345f79b3 | 625 | ret = pm_generic_runtime_suspend(dev); |
6da23358 PR |
626 | if (ret) |
627 | return ret; | |
345f79b3 | 628 | |
6da23358 | 629 | return omap_device_idle(pdev); |
345f79b3 KH |
630 | } |
631 | ||
638080c3 KH |
632 | static int _od_runtime_resume(struct device *dev) |
633 | { | |
634 | struct platform_device *pdev = to_platform_device(dev); | |
6da23358 | 635 | int ret; |
638080c3 | 636 | |
6da23358 | 637 | ret = omap_device_enable(pdev); |
08c78e9d TL |
638 | if (ret) { |
639 | dev_err(dev, "use pm_runtime_put_sync_suspend() in driver?\n"); | |
6da23358 | 640 | return ret; |
08c78e9d | 641 | } |
345f79b3 KH |
642 | |
643 | return pm_generic_runtime_resume(dev); | |
638080c3 | 644 | } |
f5c33b07 NM |
645 | |
646 | static int _od_fail_runtime_suspend(struct device *dev) | |
647 | { | |
648 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); | |
649 | return -ENODEV; | |
650 | } | |
651 | ||
652 | static int _od_fail_runtime_resume(struct device *dev) | |
653 | { | |
654 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); | |
655 | return -ENODEV; | |
656 | } | |
657 | ||
256a5435 | 658 | #endif |
638080c3 | 659 | |
c03f007a KH |
660 | #ifdef CONFIG_SUSPEND |
661 | static int _od_suspend_noirq(struct device *dev) | |
662 | { | |
663 | struct platform_device *pdev = to_platform_device(dev); | |
664 | struct omap_device *od = to_omap_device(pdev); | |
665 | int ret; | |
666 | ||
72bb6f9b KH |
667 | /* Don't attempt late suspend on a driver that is not bound */ |
668 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) | |
669 | return 0; | |
670 | ||
c03f007a KH |
671 | ret = pm_generic_suspend_noirq(dev); |
672 | ||
673 | if (!ret && !pm_runtime_status_suspended(dev)) { | |
674 | if (pm_generic_runtime_suspend(dev) == 0) { | |
3522bf7b | 675 | pm_runtime_set_suspended(dev); |
4b7ec5ac | 676 | omap_device_idle(pdev); |
c03f007a KH |
677 | od->flags |= OMAP_DEVICE_SUSPENDED; |
678 | } | |
679 | } | |
680 | ||
681 | return ret; | |
682 | } | |
683 | ||
684 | static int _od_resume_noirq(struct device *dev) | |
685 | { | |
686 | struct platform_device *pdev = to_platform_device(dev); | |
687 | struct omap_device *od = to_omap_device(pdev); | |
688 | ||
3522bf7b | 689 | if (od->flags & OMAP_DEVICE_SUSPENDED) { |
c03f007a | 690 | od->flags &= ~OMAP_DEVICE_SUSPENDED; |
4b7ec5ac | 691 | omap_device_enable(pdev); |
3522bf7b NM |
692 | /* |
693 | * XXX: we run before core runtime pm has resumed itself. At | |
694 | * this point in time, we just restore the runtime pm state and | |
695 | * considering symmetric operations in resume, we donot expect | |
696 | * to fail. If we failed, something changed in core runtime_pm | |
697 | * framework OR some device driver messed things up, hence, WARN | |
698 | */ | |
699 | WARN(pm_runtime_set_active(dev), | |
700 | "Could not set %s runtime state active\n", dev_name(dev)); | |
c03f007a KH |
701 | pm_generic_runtime_resume(dev); |
702 | } | |
703 | ||
704 | return pm_generic_resume_noirq(dev); | |
705 | } | |
126caf13 KH |
706 | #else |
707 | #define _od_suspend_noirq NULL | |
708 | #define _od_resume_noirq NULL | |
c03f007a KH |
709 | #endif |
710 | ||
f5c33b07 NM |
711 | struct dev_pm_domain omap_device_fail_pm_domain = { |
712 | .ops = { | |
713 | SET_RUNTIME_PM_OPS(_od_fail_runtime_suspend, | |
714 | _od_fail_runtime_resume, NULL) | |
715 | } | |
716 | }; | |
717 | ||
3ec2decb | 718 | struct dev_pm_domain omap_device_pm_domain = { |
638080c3 | 719 | .ops = { |
256a5435 | 720 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
45f0a85c | 721 | NULL) |
638080c3 | 722 | USE_PLATFORM_PM_SLEEP_OPS |
c381f229 GS |
723 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq, |
724 | _od_resume_noirq) | |
638080c3 KH |
725 | } |
726 | }; | |
727 | ||
b04b65ab PW |
728 | /** |
729 | * omap_device_register - register an omap_device with one omap_hwmod | |
730 | * @od: struct omap_device * to register | |
731 | * | |
732 | * Register the omap_device structure. This currently just calls | |
733 | * platform_device_register() on the underlying platform_device. | |
734 | * Returns the return value of platform_device_register(). | |
735 | */ | |
993e4fbd | 736 | int omap_device_register(struct platform_device *pdev) |
b04b65ab | 737 | { |
bfae4f8f | 738 | pr_debug("omap_device: %s: registering\n", pdev->name); |
b04b65ab | 739 | |
989561de | 740 | dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain); |
d66b3fe4 | 741 | return platform_device_add(pdev); |
b04b65ab PW |
742 | } |
743 | ||
744 | ||
745 | /* Public functions for use by device drivers through struct platform_data */ | |
746 | ||
747 | /** | |
748 | * omap_device_enable - fully activate an omap_device | |
749 | * @od: struct omap_device * to activate | |
750 | * | |
751 | * Do whatever is necessary for the hwmods underlying omap_device @od | |
752 | * to be accessible and ready to operate. This generally involves | |
753 | * enabling clocks, setting SYSCONFIG registers; and in the future may | |
754 | * involve remuxing pins. Device drivers should call this function | |
c1d1cd59 PW |
755 | * indirectly via pm_runtime_get*(). Returns -EINVAL if called when |
756 | * the omap_device is already enabled, or passes along the return | |
757 | * value of _omap_device_enable_hwmods(). | |
b04b65ab PW |
758 | */ |
759 | int omap_device_enable(struct platform_device *pdev) | |
760 | { | |
761 | int ret; | |
762 | struct omap_device *od; | |
763 | ||
8f0d69de | 764 | od = to_omap_device(pdev); |
b04b65ab PW |
765 | |
766 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
767 | dev_warn(&pdev->dev, |
768 | "omap_device: %s() called from invalid state %d\n", | |
769 | __func__, od->_state); | |
b04b65ab PW |
770 | return -EINVAL; |
771 | } | |
772 | ||
c1d1cd59 | 773 | ret = _omap_device_enable_hwmods(od); |
b04b65ab | 774 | |
6da23358 PR |
775 | if (ret == 0) |
776 | od->_state = OMAP_DEVICE_STATE_ENABLED; | |
b04b65ab PW |
777 | |
778 | return ret; | |
779 | } | |
780 | ||
781 | /** | |
782 | * omap_device_idle - idle an omap_device | |
783 | * @od: struct omap_device * to idle | |
784 | * | |
c1d1cd59 PW |
785 | * Idle omap_device @od. Device drivers call this function indirectly |
786 | * via pm_runtime_put*(). Returns -EINVAL if the omap_device is not | |
b04b65ab | 787 | * currently enabled, or passes along the return value of |
c1d1cd59 | 788 | * _omap_device_idle_hwmods(). |
b04b65ab PW |
789 | */ |
790 | int omap_device_idle(struct platform_device *pdev) | |
791 | { | |
792 | int ret; | |
793 | struct omap_device *od; | |
794 | ||
8f0d69de | 795 | od = to_omap_device(pdev); |
b04b65ab PW |
796 | |
797 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
798 | dev_warn(&pdev->dev, |
799 | "omap_device: %s() called from invalid state %d\n", | |
800 | __func__, od->_state); | |
b04b65ab PW |
801 | return -EINVAL; |
802 | } | |
803 | ||
c1d1cd59 | 804 | ret = _omap_device_idle_hwmods(od); |
b04b65ab | 805 | |
6da23358 PR |
806 | if (ret == 0) |
807 | od->_state = OMAP_DEVICE_STATE_IDLE; | |
b04b65ab PW |
808 | |
809 | return ret; | |
810 | } | |
811 | ||
8bb9fde2 ORL |
812 | /** |
813 | * omap_device_assert_hardreset - set a device's hardreset line | |
814 | * @pdev: struct platform_device * to reset | |
815 | * @name: const char * name of the reset line | |
816 | * | |
817 | * Set the hardreset line identified by @name on the IP blocks | |
818 | * associated with the hwmods backing the platform_device @pdev. All | |
819 | * of the hwmods associated with @pdev must have the same hardreset | |
820 | * line linked to them for this to work. Passes along the return value | |
821 | * of omap_hwmod_assert_hardreset() in the event of any failure, or | |
822 | * returns 0 upon success. | |
823 | */ | |
824 | int omap_device_assert_hardreset(struct platform_device *pdev, const char *name) | |
825 | { | |
826 | struct omap_device *od = to_omap_device(pdev); | |
827 | int ret = 0; | |
828 | int i; | |
829 | ||
830 | for (i = 0; i < od->hwmods_cnt; i++) { | |
831 | ret = omap_hwmod_assert_hardreset(od->hwmods[i], name); | |
832 | if (ret) | |
833 | break; | |
834 | } | |
835 | ||
836 | return ret; | |
837 | } | |
838 | ||
839 | /** | |
840 | * omap_device_deassert_hardreset - release a device's hardreset line | |
841 | * @pdev: struct platform_device * to reset | |
842 | * @name: const char * name of the reset line | |
843 | * | |
844 | * Release the hardreset line identified by @name on the IP blocks | |
845 | * associated with the hwmods backing the platform_device @pdev. All | |
846 | * of the hwmods associated with @pdev must have the same hardreset | |
847 | * line linked to them for this to work. Passes along the return | |
848 | * value of omap_hwmod_deassert_hardreset() in the event of any | |
849 | * failure, or returns 0 upon success. | |
850 | */ | |
851 | int omap_device_deassert_hardreset(struct platform_device *pdev, | |
852 | const char *name) | |
853 | { | |
854 | struct omap_device *od = to_omap_device(pdev); | |
855 | int ret = 0; | |
856 | int i; | |
857 | ||
858 | for (i = 0; i < od->hwmods_cnt; i++) { | |
859 | ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name); | |
860 | if (ret) | |
861 | break; | |
862 | } | |
863 | ||
864 | return ret; | |
865 | } | |
866 | ||
1f8a7d52 NM |
867 | /** |
868 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | |
869 | * device pointer. | |
870 | * @oh_name: name of the hwmod device | |
871 | * | |
872 | * Returns back a struct device * pointer associated with a hwmod | |
873 | * device represented by a hwmod_name | |
874 | */ | |
875 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | |
876 | { | |
877 | struct omap_hwmod *oh; | |
878 | ||
879 | if (!oh_name) { | |
880 | WARN(1, "%s: no hwmod name!\n", __func__); | |
881 | return ERR_PTR(-EINVAL); | |
882 | } | |
883 | ||
884 | oh = omap_hwmod_lookup(oh_name); | |
857835c6 | 885 | if (!oh) { |
1f8a7d52 NM |
886 | WARN(1, "%s: no hwmod for %s\n", __func__, |
887 | oh_name); | |
857835c6 | 888 | return ERR_PTR(-ENODEV); |
1f8a7d52 | 889 | } |
857835c6 | 890 | if (!oh->od) { |
1f8a7d52 NM |
891 | WARN(1, "%s: no omap_device for %s\n", __func__, |
892 | oh_name); | |
857835c6 | 893 | return ERR_PTR(-ENODEV); |
1f8a7d52 NM |
894 | } |
895 | ||
1f8a7d52 NM |
896 | return &oh->od->pdev->dev; |
897 | } | |
0d5e8252 | 898 | |
dc2d07eb BC |
899 | static struct notifier_block platform_nb = { |
900 | .notifier_call = _omap_device_notifier_call, | |
901 | }; | |
902 | ||
0d5e8252 KH |
903 | static int __init omap_device_init(void) |
904 | { | |
dc2d07eb | 905 | bus_register_notifier(&platform_bus_type, &platform_nb); |
3ec2decb | 906 | return 0; |
0d5e8252 | 907 | } |
8dd5ea72 | 908 | omap_postcore_initcall(omap_device_init); |
9634c8dd KH |
909 | |
910 | /** | |
911 | * omap_device_late_idle - idle devices without drivers | |
912 | * @dev: struct device * associated with omap_device | |
913 | * @data: unused | |
914 | * | |
915 | * Check the driver bound status of this device, and idle it | |
916 | * if there is no driver attached. | |
917 | */ | |
918 | static int __init omap_device_late_idle(struct device *dev, void *data) | |
919 | { | |
920 | struct platform_device *pdev = to_platform_device(dev); | |
921 | struct omap_device *od = to_omap_device(pdev); | |
f66e329d | 922 | int i; |
9634c8dd KH |
923 | |
924 | if (!od) | |
925 | return 0; | |
926 | ||
927 | /* | |
928 | * If omap_device state is enabled, but has no driver bound, | |
929 | * idle it. | |
930 | */ | |
f66e329d RN |
931 | |
932 | /* | |
933 | * Some devices (like memory controllers) are always kept | |
934 | * enabled, and should not be idled even with no drivers. | |
935 | */ | |
936 | for (i = 0; i < od->hwmods_cnt; i++) | |
937 | if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE) | |
938 | return 0; | |
939 | ||
fe8291e8 GS |
940 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER && |
941 | od->_driver_status != BUS_NOTIFY_BIND_DRIVER) { | |
9634c8dd KH |
942 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { |
943 | dev_warn(dev, "%s: enabled but no driver. Idling\n", | |
944 | __func__); | |
945 | omap_device_idle(pdev); | |
946 | } | |
947 | } | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
952 | static int __init omap_device_late_init(void) | |
953 | { | |
954 | bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle); | |
4b91f7f3 TL |
955 | |
956 | WARN(!of_have_populated_dt(), | |
957 | "legacy booting deprecated, please update to boot with .dts\n"); | |
958 | ||
9634c8dd KH |
959 | return 0; |
960 | } | |
e7e17c53 | 961 | omap_late_initcall_sync(omap_device_late_init); |