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63c85238 PW |
1 | /* |
2 | * omap_hwmod implementation for OMAP2/3/4 | |
3 | * | |
550c8092 | 4 | * Copyright (C) 2009-2011 Nokia Corporation |
78183f3f | 5 | * Copyright (C) 2011 Texas Instruments, Inc. |
63c85238 | 6 | * |
4788da26 PW |
7 | * Paul Walmsley, Benoît Cousson, Kevin Hilman |
8 | * | |
9 | * Created in collaboration with (alphabetical order): Thara Gopinath, | |
10 | * Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari Poussa, Anand | |
11 | * Sawant, Santosh Shilimkar, Richard Woodruff | |
63c85238 PW |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | * | |
74ff3a68 PW |
17 | * Introduction |
18 | * ------------ | |
19 | * One way to view an OMAP SoC is as a collection of largely unrelated | |
20 | * IP blocks connected by interconnects. The IP blocks include | |
21 | * devices such as ARM processors, audio serial interfaces, UARTs, | |
22 | * etc. Some of these devices, like the DSP, are created by TI; | |
23 | * others, like the SGX, largely originate from external vendors. In | |
24 | * TI's documentation, on-chip devices are referred to as "OMAP | |
25 | * modules." Some of these IP blocks are identical across several | |
26 | * OMAP versions. Others are revised frequently. | |
63c85238 | 27 | * |
74ff3a68 PW |
28 | * These OMAP modules are tied together by various interconnects. |
29 | * Most of the address and data flow between modules is via OCP-based | |
30 | * interconnects such as the L3 and L4 buses; but there are other | |
31 | * interconnects that distribute the hardware clock tree, handle idle | |
32 | * and reset signaling, supply power, and connect the modules to | |
33 | * various pads or balls on the OMAP package. | |
34 | * | |
35 | * OMAP hwmod provides a consistent way to describe the on-chip | |
36 | * hardware blocks and their integration into the rest of the chip. | |
37 | * This description can be automatically generated from the TI | |
38 | * hardware database. OMAP hwmod provides a standard, consistent API | |
39 | * to reset, enable, idle, and disable these hardware blocks. And | |
40 | * hwmod provides a way for other core code, such as the Linux device | |
41 | * code or the OMAP power management and address space mapping code, | |
42 | * to query the hardware database. | |
43 | * | |
44 | * Using hwmod | |
45 | * ----------- | |
46 | * Drivers won't call hwmod functions directly. That is done by the | |
47 | * omap_device code, and in rare occasions, by custom integration code | |
48 | * in arch/arm/ *omap*. The omap_device code includes functions to | |
49 | * build a struct platform_device using omap_hwmod data, and that is | |
50 | * currently how hwmod data is communicated to drivers and to the | |
51 | * Linux driver model. Most drivers will call omap_hwmod functions only | |
52 | * indirectly, via pm_runtime*() functions. | |
53 | * | |
54 | * From a layering perspective, here is where the OMAP hwmod code | |
55 | * fits into the kernel software stack: | |
56 | * | |
57 | * +-------------------------------+ | |
58 | * | Device driver code | | |
59 | * | (e.g., drivers/) | | |
60 | * +-------------------------------+ | |
61 | * | Linux driver model | | |
62 | * | (platform_device / | | |
63 | * | platform_driver data/code) | | |
64 | * +-------------------------------+ | |
65 | * | OMAP core-driver integration | | |
66 | * |(arch/arm/mach-omap2/devices.c)| | |
67 | * +-------------------------------+ | |
68 | * | omap_device code | | |
69 | * | (../plat-omap/omap_device.c) | | |
70 | * +-------------------------------+ | |
71 | * ----> | omap_hwmod code/data | <----- | |
72 | * | (../mach-omap2/omap_hwmod*) | | |
73 | * +-------------------------------+ | |
74 | * | OMAP clock/PRCM/register fns | | |
75 | * | (__raw_{read,write}l, clk*) | | |
76 | * +-------------------------------+ | |
77 | * | |
78 | * Device drivers should not contain any OMAP-specific code or data in | |
79 | * them. They should only contain code to operate the IP block that | |
80 | * the driver is responsible for. This is because these IP blocks can | |
81 | * also appear in other SoCs, either from TI (such as DaVinci) or from | |
82 | * other manufacturers; and drivers should be reusable across other | |
83 | * platforms. | |
84 | * | |
85 | * The OMAP hwmod code also will attempt to reset and idle all on-chip | |
86 | * devices upon boot. The goal here is for the kernel to be | |
87 | * completely self-reliant and independent from bootloaders. This is | |
88 | * to ensure a repeatable configuration, both to ensure consistent | |
89 | * runtime behavior, and to make it easier for others to reproduce | |
90 | * bugs. | |
91 | * | |
92 | * OMAP module activity states | |
93 | * --------------------------- | |
94 | * The hwmod code considers modules to be in one of several activity | |
95 | * states. IP blocks start out in an UNKNOWN state, then once they | |
96 | * are registered via the hwmod code, proceed to the REGISTERED state. | |
97 | * Once their clock names are resolved to clock pointers, the module | |
98 | * enters the CLKS_INITED state; and finally, once the module has been | |
99 | * reset and the integration registers programmed, the INITIALIZED state | |
100 | * is entered. The hwmod code will then place the module into either | |
101 | * the IDLE state to save power, or in the case of a critical system | |
102 | * module, the ENABLED state. | |
103 | * | |
104 | * OMAP core integration code can then call omap_hwmod*() functions | |
105 | * directly to move the module between the IDLE, ENABLED, and DISABLED | |
106 | * states, as needed. This is done during both the PM idle loop, and | |
107 | * in the OMAP core integration code's implementation of the PM runtime | |
108 | * functions. | |
109 | * | |
110 | * References | |
111 | * ---------- | |
112 | * This is a partial list. | |
63c85238 PW |
113 | * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064) |
114 | * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090) | |
115 | * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108) | |
116 | * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140) | |
117 | * - Open Core Protocol Specification 2.2 | |
118 | * | |
119 | * To do: | |
63c85238 PW |
120 | * - handle IO mapping |
121 | * - bus throughput & module latency measurement code | |
122 | * | |
123 | * XXX add tests at the beginning of each function to ensure the hwmod is | |
124 | * in the appropriate state | |
125 | * XXX error return values should be checked to ensure that they are | |
126 | * appropriate | |
127 | */ | |
128 | #undef DEBUG | |
129 | ||
130 | #include <linux/kernel.h> | |
131 | #include <linux/errno.h> | |
132 | #include <linux/io.h> | |
133 | #include <linux/clk.h> | |
134 | #include <linux/delay.h> | |
135 | #include <linux/err.h> | |
136 | #include <linux/list.h> | |
137 | #include <linux/mutex.h> | |
dc6d1cda | 138 | #include <linux/spinlock.h> |
63c85238 | 139 | |
6f8b7ff5 | 140 | #include <plat/common.h> |
ce491cf8 | 141 | #include <plat/cpu.h> |
1540f214 | 142 | #include "clockdomain.h" |
72e06d08 | 143 | #include "powerdomain.h" |
ce491cf8 TL |
144 | #include <plat/clock.h> |
145 | #include <plat/omap_hwmod.h> | |
5365efbe | 146 | #include <plat/prcm.h> |
63c85238 | 147 | |
59fb659b | 148 | #include "cm2xxx_3xxx.h" |
d0f0631d | 149 | #include "cminst44xx.h" |
59fb659b | 150 | #include "prm2xxx_3xxx.h" |
d198b514 | 151 | #include "prm44xx.h" |
eaac329d | 152 | #include "prminst44xx.h" |
8d9af88f | 153 | #include "mux.h" |
63c85238 | 154 | |
5365efbe BC |
155 | /* Maximum microseconds to wait for OMAP module to softreset */ |
156 | #define MAX_MODULE_SOFTRESET_WAIT 10000 | |
63c85238 PW |
157 | |
158 | /* Name of the OMAP hwmod for the MPU */ | |
5c2c0296 | 159 | #define MPU_INITIATOR_NAME "mpu" |
63c85238 PW |
160 | |
161 | /* omap_hwmod_list contains all registered struct omap_hwmods */ | |
162 | static LIST_HEAD(omap_hwmod_list); | |
163 | ||
63c85238 PW |
164 | /* mpu_oh: used to add/remove MPU initiator from sleepdep list */ |
165 | static struct omap_hwmod *mpu_oh; | |
166 | ||
63c85238 PW |
167 | |
168 | /* Private functions */ | |
169 | ||
170 | /** | |
171 | * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy | |
172 | * @oh: struct omap_hwmod * | |
173 | * | |
174 | * Load the current value of the hwmod OCP_SYSCONFIG register into the | |
175 | * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no | |
176 | * OCP_SYSCONFIG register or 0 upon success. | |
177 | */ | |
178 | static int _update_sysc_cache(struct omap_hwmod *oh) | |
179 | { | |
43b40992 PW |
180 | if (!oh->class->sysc) { |
181 | WARN(1, "omap_hwmod: %s: cannot read OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name); | |
63c85238 PW |
182 | return -EINVAL; |
183 | } | |
184 | ||
185 | /* XXX ensure module interface clock is up */ | |
186 | ||
cc7a1d2a | 187 | oh->_sysc_cache = omap_hwmod_read(oh, oh->class->sysc->sysc_offs); |
63c85238 | 188 | |
43b40992 | 189 | if (!(oh->class->sysc->sysc_flags & SYSC_NO_CACHE)) |
883edfdd | 190 | oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED; |
63c85238 PW |
191 | |
192 | return 0; | |
193 | } | |
194 | ||
195 | /** | |
196 | * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register | |
197 | * @v: OCP_SYSCONFIG value to write | |
198 | * @oh: struct omap_hwmod * | |
199 | * | |
43b40992 PW |
200 | * Write @v into the module class' OCP_SYSCONFIG register, if it has |
201 | * one. No return value. | |
63c85238 PW |
202 | */ |
203 | static void _write_sysconfig(u32 v, struct omap_hwmod *oh) | |
204 | { | |
43b40992 PW |
205 | if (!oh->class->sysc) { |
206 | WARN(1, "omap_hwmod: %s: cannot write OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name); | |
63c85238 PW |
207 | return; |
208 | } | |
209 | ||
210 | /* XXX ensure module interface clock is up */ | |
211 | ||
233cbe5b RN |
212 | /* Module might have lost context, always update cache and register */ |
213 | oh->_sysc_cache = v; | |
214 | omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); | |
63c85238 PW |
215 | } |
216 | ||
217 | /** | |
218 | * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v | |
219 | * @oh: struct omap_hwmod * | |
220 | * @standbymode: MIDLEMODE field bits | |
221 | * @v: pointer to register contents to modify | |
222 | * | |
223 | * Update the master standby mode bits in @v to be @standbymode for | |
224 | * the @oh hwmod. Does not write to the hardware. Returns -EINVAL | |
225 | * upon error or 0 upon success. | |
226 | */ | |
227 | static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode, | |
228 | u32 *v) | |
229 | { | |
358f0e63 TG |
230 | u32 mstandby_mask; |
231 | u8 mstandby_shift; | |
232 | ||
43b40992 PW |
233 | if (!oh->class->sysc || |
234 | !(oh->class->sysc->sysc_flags & SYSC_HAS_MIDLEMODE)) | |
63c85238 PW |
235 | return -EINVAL; |
236 | ||
43b40992 PW |
237 | if (!oh->class->sysc->sysc_fields) { |
238 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
239 | return -EINVAL; |
240 | } | |
241 | ||
43b40992 | 242 | mstandby_shift = oh->class->sysc->sysc_fields->midle_shift; |
358f0e63 TG |
243 | mstandby_mask = (0x3 << mstandby_shift); |
244 | ||
245 | *v &= ~mstandby_mask; | |
246 | *v |= __ffs(standbymode) << mstandby_shift; | |
63c85238 PW |
247 | |
248 | return 0; | |
249 | } | |
250 | ||
251 | /** | |
252 | * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v | |
253 | * @oh: struct omap_hwmod * | |
254 | * @idlemode: SIDLEMODE field bits | |
255 | * @v: pointer to register contents to modify | |
256 | * | |
257 | * Update the slave idle mode bits in @v to be @idlemode for the @oh | |
258 | * hwmod. Does not write to the hardware. Returns -EINVAL upon error | |
259 | * or 0 upon success. | |
260 | */ | |
261 | static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v) | |
262 | { | |
358f0e63 TG |
263 | u32 sidle_mask; |
264 | u8 sidle_shift; | |
265 | ||
43b40992 PW |
266 | if (!oh->class->sysc || |
267 | !(oh->class->sysc->sysc_flags & SYSC_HAS_SIDLEMODE)) | |
63c85238 PW |
268 | return -EINVAL; |
269 | ||
43b40992 PW |
270 | if (!oh->class->sysc->sysc_fields) { |
271 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
272 | return -EINVAL; |
273 | } | |
274 | ||
43b40992 | 275 | sidle_shift = oh->class->sysc->sysc_fields->sidle_shift; |
358f0e63 TG |
276 | sidle_mask = (0x3 << sidle_shift); |
277 | ||
278 | *v &= ~sidle_mask; | |
279 | *v |= __ffs(idlemode) << sidle_shift; | |
63c85238 PW |
280 | |
281 | return 0; | |
282 | } | |
283 | ||
284 | /** | |
285 | * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v | |
286 | * @oh: struct omap_hwmod * | |
287 | * @clockact: CLOCKACTIVITY field bits | |
288 | * @v: pointer to register contents to modify | |
289 | * | |
290 | * Update the clockactivity mode bits in @v to be @clockact for the | |
291 | * @oh hwmod. Used for additional powersaving on some modules. Does | |
292 | * not write to the hardware. Returns -EINVAL upon error or 0 upon | |
293 | * success. | |
294 | */ | |
295 | static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v) | |
296 | { | |
358f0e63 TG |
297 | u32 clkact_mask; |
298 | u8 clkact_shift; | |
299 | ||
43b40992 PW |
300 | if (!oh->class->sysc || |
301 | !(oh->class->sysc->sysc_flags & SYSC_HAS_CLOCKACTIVITY)) | |
63c85238 PW |
302 | return -EINVAL; |
303 | ||
43b40992 PW |
304 | if (!oh->class->sysc->sysc_fields) { |
305 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
306 | return -EINVAL; |
307 | } | |
308 | ||
43b40992 | 309 | clkact_shift = oh->class->sysc->sysc_fields->clkact_shift; |
358f0e63 TG |
310 | clkact_mask = (0x3 << clkact_shift); |
311 | ||
312 | *v &= ~clkact_mask; | |
313 | *v |= clockact << clkact_shift; | |
63c85238 PW |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
318 | /** | |
319 | * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v | |
320 | * @oh: struct omap_hwmod * | |
321 | * @v: pointer to register contents to modify | |
322 | * | |
323 | * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon | |
324 | * error or 0 upon success. | |
325 | */ | |
326 | static int _set_softreset(struct omap_hwmod *oh, u32 *v) | |
327 | { | |
358f0e63 TG |
328 | u32 softrst_mask; |
329 | ||
43b40992 PW |
330 | if (!oh->class->sysc || |
331 | !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) | |
63c85238 PW |
332 | return -EINVAL; |
333 | ||
43b40992 PW |
334 | if (!oh->class->sysc->sysc_fields) { |
335 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
336 | return -EINVAL; |
337 | } | |
338 | ||
43b40992 | 339 | softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift); |
358f0e63 TG |
340 | |
341 | *v |= softrst_mask; | |
63c85238 PW |
342 | |
343 | return 0; | |
344 | } | |
345 | ||
726072e5 PW |
346 | /** |
347 | * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v | |
348 | * @oh: struct omap_hwmod * | |
349 | * @autoidle: desired AUTOIDLE bitfield value (0 or 1) | |
350 | * @v: pointer to register contents to modify | |
351 | * | |
352 | * Update the module autoidle bit in @v to be @autoidle for the @oh | |
353 | * hwmod. The autoidle bit controls whether the module can gate | |
354 | * internal clocks automatically when it isn't doing anything; the | |
355 | * exact function of this bit varies on a per-module basis. This | |
356 | * function does not write to the hardware. Returns -EINVAL upon | |
357 | * error or 0 upon success. | |
358 | */ | |
359 | static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, | |
360 | u32 *v) | |
361 | { | |
358f0e63 TG |
362 | u32 autoidle_mask; |
363 | u8 autoidle_shift; | |
364 | ||
43b40992 PW |
365 | if (!oh->class->sysc || |
366 | !(oh->class->sysc->sysc_flags & SYSC_HAS_AUTOIDLE)) | |
726072e5 PW |
367 | return -EINVAL; |
368 | ||
43b40992 PW |
369 | if (!oh->class->sysc->sysc_fields) { |
370 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
371 | return -EINVAL; |
372 | } | |
373 | ||
43b40992 | 374 | autoidle_shift = oh->class->sysc->sysc_fields->autoidle_shift; |
8985b63d | 375 | autoidle_mask = (0x1 << autoidle_shift); |
358f0e63 TG |
376 | |
377 | *v &= ~autoidle_mask; | |
378 | *v |= autoidle << autoidle_shift; | |
726072e5 PW |
379 | |
380 | return 0; | |
381 | } | |
382 | ||
63c85238 PW |
383 | /** |
384 | * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware | |
385 | * @oh: struct omap_hwmod * | |
386 | * | |
387 | * Allow the hardware module @oh to send wakeups. Returns -EINVAL | |
388 | * upon error or 0 upon success. | |
389 | */ | |
5a7ddcbd | 390 | static int _enable_wakeup(struct omap_hwmod *oh, u32 *v) |
63c85238 | 391 | { |
43b40992 | 392 | if (!oh->class->sysc || |
86009eb3 | 393 | !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) || |
724019b0 BC |
394 | (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) || |
395 | (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP))) | |
63c85238 PW |
396 | return -EINVAL; |
397 | ||
43b40992 PW |
398 | if (!oh->class->sysc->sysc_fields) { |
399 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
400 | return -EINVAL; |
401 | } | |
402 | ||
1fe74113 BC |
403 | if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) |
404 | *v |= 0x1 << oh->class->sysc->sysc_fields->enwkup_shift; | |
63c85238 | 405 | |
86009eb3 BC |
406 | if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) |
407 | _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART_WKUP, v); | |
724019b0 BC |
408 | if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) |
409 | _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v); | |
86009eb3 | 410 | |
63c85238 PW |
411 | /* XXX test pwrdm_get_wken for this hwmod's subsystem */ |
412 | ||
413 | oh->_int_flags |= _HWMOD_WAKEUP_ENABLED; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | /** | |
419 | * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware | |
420 | * @oh: struct omap_hwmod * | |
421 | * | |
422 | * Prevent the hardware module @oh to send wakeups. Returns -EINVAL | |
423 | * upon error or 0 upon success. | |
424 | */ | |
5a7ddcbd | 425 | static int _disable_wakeup(struct omap_hwmod *oh, u32 *v) |
63c85238 | 426 | { |
43b40992 | 427 | if (!oh->class->sysc || |
86009eb3 | 428 | !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) || |
724019b0 BC |
429 | (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) || |
430 | (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP))) | |
63c85238 PW |
431 | return -EINVAL; |
432 | ||
43b40992 PW |
433 | if (!oh->class->sysc->sysc_fields) { |
434 | WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); | |
358f0e63 TG |
435 | return -EINVAL; |
436 | } | |
437 | ||
1fe74113 BC |
438 | if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) |
439 | *v &= ~(0x1 << oh->class->sysc->sysc_fields->enwkup_shift); | |
63c85238 | 440 | |
86009eb3 BC |
441 | if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) |
442 | _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART, v); | |
724019b0 BC |
443 | if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) |
444 | _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v); | |
86009eb3 | 445 | |
63c85238 PW |
446 | /* XXX test pwrdm_get_wken for this hwmod's subsystem */ |
447 | ||
448 | oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | /** | |
454 | * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active | |
455 | * @oh: struct omap_hwmod * | |
456 | * | |
457 | * Prevent the hardware module @oh from entering idle while the | |
458 | * hardare module initiator @init_oh is active. Useful when a module | |
459 | * will be accessed by a particular initiator (e.g., if a module will | |
460 | * be accessed by the IVA, there should be a sleepdep between the IVA | |
461 | * initiator and the module). Only applies to modules in smart-idle | |
570b54c7 PW |
462 | * mode. If the clockdomain is marked as not needing autodeps, return |
463 | * 0 without doing anything. Otherwise, returns -EINVAL upon error or | |
464 | * passes along clkdm_add_sleepdep() value upon success. | |
63c85238 PW |
465 | */ |
466 | static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) | |
467 | { | |
468 | if (!oh->_clk) | |
469 | return -EINVAL; | |
470 | ||
570b54c7 PW |
471 | if (oh->_clk->clkdm && oh->_clk->clkdm->flags & CLKDM_NO_AUTODEPS) |
472 | return 0; | |
473 | ||
55ed9694 | 474 | return clkdm_add_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); |
63c85238 PW |
475 | } |
476 | ||
477 | /** | |
478 | * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active | |
479 | * @oh: struct omap_hwmod * | |
480 | * | |
481 | * Allow the hardware module @oh to enter idle while the hardare | |
482 | * module initiator @init_oh is active. Useful when a module will not | |
483 | * be accessed by a particular initiator (e.g., if a module will not | |
484 | * be accessed by the IVA, there should be no sleepdep between the IVA | |
485 | * initiator and the module). Only applies to modules in smart-idle | |
570b54c7 PW |
486 | * mode. If the clockdomain is marked as not needing autodeps, return |
487 | * 0 without doing anything. Returns -EINVAL upon error or passes | |
488 | * along clkdm_del_sleepdep() value upon success. | |
63c85238 PW |
489 | */ |
490 | static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) | |
491 | { | |
492 | if (!oh->_clk) | |
493 | return -EINVAL; | |
494 | ||
570b54c7 PW |
495 | if (oh->_clk->clkdm && oh->_clk->clkdm->flags & CLKDM_NO_AUTODEPS) |
496 | return 0; | |
497 | ||
55ed9694 | 498 | return clkdm_del_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); |
63c85238 PW |
499 | } |
500 | ||
501 | /** | |
502 | * _init_main_clk - get a struct clk * for the the hwmod's main functional clk | |
503 | * @oh: struct omap_hwmod * | |
504 | * | |
505 | * Called from _init_clocks(). Populates the @oh _clk (main | |
506 | * functional clock pointer) if a main_clk is present. Returns 0 on | |
507 | * success or -EINVAL on error. | |
508 | */ | |
509 | static int _init_main_clk(struct omap_hwmod *oh) | |
510 | { | |
63c85238 PW |
511 | int ret = 0; |
512 | ||
50ebdac2 | 513 | if (!oh->main_clk) |
63c85238 PW |
514 | return 0; |
515 | ||
63403384 | 516 | oh->_clk = omap_clk_get_by_name(oh->main_clk); |
dc75925d | 517 | if (!oh->_clk) { |
20383d82 BC |
518 | pr_warning("omap_hwmod: %s: cannot clk_get main_clk %s\n", |
519 | oh->name, oh->main_clk); | |
63403384 | 520 | return -EINVAL; |
dc75925d | 521 | } |
63c85238 | 522 | |
63403384 BC |
523 | if (!oh->_clk->clkdm) |
524 | pr_warning("omap_hwmod: %s: missing clockdomain for %s.\n", | |
525 | oh->main_clk, oh->_clk->name); | |
81d7c6ff | 526 | |
63c85238 PW |
527 | return ret; |
528 | } | |
529 | ||
530 | /** | |
887adeac | 531 | * _init_interface_clks - get a struct clk * for the the hwmod's interface clks |
63c85238 PW |
532 | * @oh: struct omap_hwmod * |
533 | * | |
534 | * Called from _init_clocks(). Populates the @oh OCP slave interface | |
535 | * clock pointers. Returns 0 on success or -EINVAL on error. | |
536 | */ | |
537 | static int _init_interface_clks(struct omap_hwmod *oh) | |
538 | { | |
63c85238 PW |
539 | struct clk *c; |
540 | int i; | |
541 | int ret = 0; | |
542 | ||
543 | if (oh->slaves_cnt == 0) | |
544 | return 0; | |
545 | ||
682fdc96 BC |
546 | for (i = 0; i < oh->slaves_cnt; i++) { |
547 | struct omap_hwmod_ocp_if *os = oh->slaves[i]; | |
548 | ||
50ebdac2 | 549 | if (!os->clk) |
63c85238 PW |
550 | continue; |
551 | ||
50ebdac2 | 552 | c = omap_clk_get_by_name(os->clk); |
dc75925d | 553 | if (!c) { |
20383d82 BC |
554 | pr_warning("omap_hwmod: %s: cannot clk_get interface_clk %s\n", |
555 | oh->name, os->clk); | |
63c85238 | 556 | ret = -EINVAL; |
dc75925d | 557 | } |
63c85238 PW |
558 | os->_clk = c; |
559 | } | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | /** | |
565 | * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks | |
566 | * @oh: struct omap_hwmod * | |
567 | * | |
568 | * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk | |
569 | * clock pointers. Returns 0 on success or -EINVAL on error. | |
570 | */ | |
571 | static int _init_opt_clks(struct omap_hwmod *oh) | |
572 | { | |
573 | struct omap_hwmod_opt_clk *oc; | |
574 | struct clk *c; | |
575 | int i; | |
576 | int ret = 0; | |
577 | ||
578 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) { | |
50ebdac2 | 579 | c = omap_clk_get_by_name(oc->clk); |
dc75925d | 580 | if (!c) { |
20383d82 BC |
581 | pr_warning("omap_hwmod: %s: cannot clk_get opt_clk %s\n", |
582 | oh->name, oc->clk); | |
63c85238 | 583 | ret = -EINVAL; |
dc75925d | 584 | } |
63c85238 PW |
585 | oc->_clk = c; |
586 | } | |
587 | ||
588 | return ret; | |
589 | } | |
590 | ||
591 | /** | |
592 | * _enable_clocks - enable hwmod main clock and interface clocks | |
593 | * @oh: struct omap_hwmod * | |
594 | * | |
595 | * Enables all clocks necessary for register reads and writes to succeed | |
596 | * on the hwmod @oh. Returns 0. | |
597 | */ | |
598 | static int _enable_clocks(struct omap_hwmod *oh) | |
599 | { | |
63c85238 PW |
600 | int i; |
601 | ||
602 | pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name); | |
603 | ||
4d3ae5a9 | 604 | if (oh->_clk) |
63c85238 PW |
605 | clk_enable(oh->_clk); |
606 | ||
607 | if (oh->slaves_cnt > 0) { | |
682fdc96 BC |
608 | for (i = 0; i < oh->slaves_cnt; i++) { |
609 | struct omap_hwmod_ocp_if *os = oh->slaves[i]; | |
63c85238 PW |
610 | struct clk *c = os->_clk; |
611 | ||
4d3ae5a9 | 612 | if (c && (os->flags & OCPIF_SWSUP_IDLE)) |
63c85238 PW |
613 | clk_enable(c); |
614 | } | |
615 | } | |
616 | ||
617 | /* The opt clocks are controlled by the device driver. */ | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | /** | |
623 | * _disable_clocks - disable hwmod main clock and interface clocks | |
624 | * @oh: struct omap_hwmod * | |
625 | * | |
626 | * Disables the hwmod @oh main functional and interface clocks. Returns 0. | |
627 | */ | |
628 | static int _disable_clocks(struct omap_hwmod *oh) | |
629 | { | |
63c85238 PW |
630 | int i; |
631 | ||
632 | pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name); | |
633 | ||
4d3ae5a9 | 634 | if (oh->_clk) |
63c85238 PW |
635 | clk_disable(oh->_clk); |
636 | ||
637 | if (oh->slaves_cnt > 0) { | |
682fdc96 BC |
638 | for (i = 0; i < oh->slaves_cnt; i++) { |
639 | struct omap_hwmod_ocp_if *os = oh->slaves[i]; | |
63c85238 PW |
640 | struct clk *c = os->_clk; |
641 | ||
4d3ae5a9 | 642 | if (c && (os->flags & OCPIF_SWSUP_IDLE)) |
63c85238 PW |
643 | clk_disable(c); |
644 | } | |
645 | } | |
646 | ||
647 | /* The opt clocks are controlled by the device driver. */ | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
96835af9 BC |
652 | static void _enable_optional_clocks(struct omap_hwmod *oh) |
653 | { | |
654 | struct omap_hwmod_opt_clk *oc; | |
655 | int i; | |
656 | ||
657 | pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh->name); | |
658 | ||
659 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) | |
660 | if (oc->_clk) { | |
661 | pr_debug("omap_hwmod: enable %s:%s\n", oc->role, | |
662 | oc->_clk->name); | |
663 | clk_enable(oc->_clk); | |
664 | } | |
665 | } | |
666 | ||
667 | static void _disable_optional_clocks(struct omap_hwmod *oh) | |
668 | { | |
669 | struct omap_hwmod_opt_clk *oc; | |
670 | int i; | |
671 | ||
672 | pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh->name); | |
673 | ||
674 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) | |
675 | if (oc->_clk) { | |
676 | pr_debug("omap_hwmod: disable %s:%s\n", oc->role, | |
677 | oc->_clk->name); | |
678 | clk_disable(oc->_clk); | |
679 | } | |
680 | } | |
681 | ||
45c38252 BC |
682 | /** |
683 | * _enable_module - enable CLKCTRL modulemode on OMAP4 | |
684 | * @oh: struct omap_hwmod * | |
685 | * | |
686 | * Enables the PRCM module mode related to the hwmod @oh. | |
687 | * No return value. | |
688 | */ | |
689 | static void _enable_module(struct omap_hwmod *oh) | |
690 | { | |
691 | /* The module mode does not exist prior OMAP4 */ | |
692 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) | |
693 | return; | |
694 | ||
695 | if (!oh->clkdm || !oh->prcm.omap4.modulemode) | |
696 | return; | |
697 | ||
698 | pr_debug("omap_hwmod: %s: _enable_module: %d\n", | |
699 | oh->name, oh->prcm.omap4.modulemode); | |
700 | ||
701 | omap4_cminst_module_enable(oh->prcm.omap4.modulemode, | |
702 | oh->clkdm->prcm_partition, | |
703 | oh->clkdm->cm_inst, | |
704 | oh->clkdm->clkdm_offs, | |
705 | oh->prcm.omap4.clkctrl_offs); | |
706 | } | |
707 | ||
708 | /** | |
709 | * _disable_module - enable CLKCTRL modulemode on OMAP4 | |
710 | * @oh: struct omap_hwmod * | |
711 | * | |
712 | * Disable the PRCM module mode related to the hwmod @oh. | |
713 | * No return value. | |
714 | */ | |
715 | static void _disable_module(struct omap_hwmod *oh) | |
716 | { | |
717 | /* The module mode does not exist prior OMAP4 */ | |
718 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) | |
719 | return; | |
720 | ||
721 | if (!oh->clkdm || !oh->prcm.omap4.modulemode) | |
722 | return; | |
723 | ||
724 | pr_debug("omap_hwmod: %s: _disable_module\n", oh->name); | |
725 | ||
726 | omap4_cminst_module_disable(oh->clkdm->prcm_partition, | |
727 | oh->clkdm->cm_inst, | |
728 | oh->clkdm->clkdm_offs, | |
729 | oh->prcm.omap4.clkctrl_offs); | |
730 | } | |
731 | ||
212738a4 PW |
732 | /** |
733 | * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh | |
734 | * @oh: struct omap_hwmod *oh | |
735 | * | |
736 | * Count and return the number of MPU IRQs associated with the hwmod | |
737 | * @oh. Used to allocate struct resource data. Returns 0 if @oh is | |
738 | * NULL. | |
739 | */ | |
740 | static int _count_mpu_irqs(struct omap_hwmod *oh) | |
741 | { | |
742 | struct omap_hwmod_irq_info *ohii; | |
743 | int i = 0; | |
744 | ||
745 | if (!oh || !oh->mpu_irqs) | |
746 | return 0; | |
747 | ||
748 | do { | |
749 | ohii = &oh->mpu_irqs[i++]; | |
750 | } while (ohii->irq != -1); | |
751 | ||
752 | return i; | |
753 | } | |
754 | ||
bc614958 PW |
755 | /** |
756 | * _count_sdma_reqs - count the number of SDMA request lines associated with @oh | |
757 | * @oh: struct omap_hwmod *oh | |
758 | * | |
759 | * Count and return the number of SDMA request lines associated with | |
760 | * the hwmod @oh. Used to allocate struct resource data. Returns 0 | |
761 | * if @oh is NULL. | |
762 | */ | |
763 | static int _count_sdma_reqs(struct omap_hwmod *oh) | |
764 | { | |
765 | struct omap_hwmod_dma_info *ohdi; | |
766 | int i = 0; | |
767 | ||
768 | if (!oh || !oh->sdma_reqs) | |
769 | return 0; | |
770 | ||
771 | do { | |
772 | ohdi = &oh->sdma_reqs[i++]; | |
773 | } while (ohdi->dma_req != -1); | |
774 | ||
775 | return i; | |
776 | } | |
777 | ||
78183f3f PW |
778 | /** |
779 | * _count_ocp_if_addr_spaces - count the number of address space entries for @oh | |
780 | * @oh: struct omap_hwmod *oh | |
781 | * | |
782 | * Count and return the number of address space ranges associated with | |
783 | * the hwmod @oh. Used to allocate struct resource data. Returns 0 | |
784 | * if @oh is NULL. | |
785 | */ | |
786 | static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os) | |
787 | { | |
788 | struct omap_hwmod_addr_space *mem; | |
789 | int i = 0; | |
790 | ||
791 | if (!os || !os->addr) | |
792 | return 0; | |
793 | ||
794 | do { | |
795 | mem = &os->addr[i++]; | |
796 | } while (mem->pa_start != mem->pa_end); | |
797 | ||
798 | return i; | |
799 | } | |
800 | ||
63c85238 PW |
801 | /** |
802 | * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use | |
803 | * @oh: struct omap_hwmod * | |
804 | * | |
805 | * Returns the array index of the OCP slave port that the MPU | |
806 | * addresses the device on, or -EINVAL upon error or not found. | |
807 | */ | |
01592df9 | 808 | static int __init _find_mpu_port_index(struct omap_hwmod *oh) |
63c85238 | 809 | { |
63c85238 PW |
810 | int i; |
811 | int found = 0; | |
812 | ||
813 | if (!oh || oh->slaves_cnt == 0) | |
814 | return -EINVAL; | |
815 | ||
682fdc96 BC |
816 | for (i = 0; i < oh->slaves_cnt; i++) { |
817 | struct omap_hwmod_ocp_if *os = oh->slaves[i]; | |
818 | ||
63c85238 PW |
819 | if (os->user & OCP_USER_MPU) { |
820 | found = 1; | |
821 | break; | |
822 | } | |
823 | } | |
824 | ||
825 | if (found) | |
826 | pr_debug("omap_hwmod: %s: MPU OCP slave port ID %d\n", | |
827 | oh->name, i); | |
828 | else | |
829 | pr_debug("omap_hwmod: %s: no MPU OCP slave port found\n", | |
830 | oh->name); | |
831 | ||
832 | return (found) ? i : -EINVAL; | |
833 | } | |
834 | ||
835 | /** | |
836 | * _find_mpu_rt_base - find hwmod register target base addr accessible by MPU | |
837 | * @oh: struct omap_hwmod * | |
838 | * | |
839 | * Return the virtual address of the base of the register target of | |
840 | * device @oh, or NULL on error. | |
841 | */ | |
01592df9 | 842 | static void __iomem * __init _find_mpu_rt_base(struct omap_hwmod *oh, u8 index) |
63c85238 PW |
843 | { |
844 | struct omap_hwmod_ocp_if *os; | |
845 | struct omap_hwmod_addr_space *mem; | |
78183f3f | 846 | int i = 0, found = 0; |
986a13f5 | 847 | void __iomem *va_start; |
63c85238 PW |
848 | |
849 | if (!oh || oh->slaves_cnt == 0) | |
850 | return NULL; | |
851 | ||
682fdc96 | 852 | os = oh->slaves[index]; |
63c85238 | 853 | |
78183f3f PW |
854 | if (!os->addr) |
855 | return NULL; | |
856 | ||
857 | do { | |
858 | mem = &os->addr[i++]; | |
859 | if (mem->flags & ADDR_TYPE_RT) | |
63c85238 | 860 | found = 1; |
78183f3f | 861 | } while (!found && mem->pa_start != mem->pa_end); |
63c85238 | 862 | |
986a13f5 TL |
863 | if (found) { |
864 | va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start); | |
865 | if (!va_start) { | |
866 | pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name); | |
867 | return NULL; | |
868 | } | |
63c85238 | 869 | pr_debug("omap_hwmod: %s: MPU register target at va %p\n", |
986a13f5 TL |
870 | oh->name, va_start); |
871 | } else { | |
63c85238 PW |
872 | pr_debug("omap_hwmod: %s: no MPU register target found\n", |
873 | oh->name); | |
986a13f5 | 874 | } |
63c85238 | 875 | |
986a13f5 | 876 | return (found) ? va_start : NULL; |
63c85238 PW |
877 | } |
878 | ||
879 | /** | |
74ff3a68 | 880 | * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG |
63c85238 PW |
881 | * @oh: struct omap_hwmod * |
882 | * | |
883 | * If module is marked as SWSUP_SIDLE, force the module out of slave | |
884 | * idle; otherwise, configure it for smart-idle. If module is marked | |
885 | * as SWSUP_MSUSPEND, force the module out of master standby; | |
886 | * otherwise, configure it for smart-standby. No return value. | |
887 | */ | |
74ff3a68 | 888 | static void _enable_sysc(struct omap_hwmod *oh) |
63c85238 | 889 | { |
43b40992 | 890 | u8 idlemode, sf; |
63c85238 PW |
891 | u32 v; |
892 | ||
43b40992 | 893 | if (!oh->class->sysc) |
63c85238 PW |
894 | return; |
895 | ||
896 | v = oh->_sysc_cache; | |
43b40992 | 897 | sf = oh->class->sysc->sysc_flags; |
63c85238 | 898 | |
43b40992 | 899 | if (sf & SYSC_HAS_SIDLEMODE) { |
63c85238 PW |
900 | idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ? |
901 | HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART; | |
902 | _set_slave_idlemode(oh, idlemode, &v); | |
903 | } | |
904 | ||
43b40992 | 905 | if (sf & SYSC_HAS_MIDLEMODE) { |
724019b0 BC |
906 | if (oh->flags & HWMOD_SWSUP_MSTANDBY) { |
907 | idlemode = HWMOD_IDLEMODE_NO; | |
908 | } else { | |
909 | if (sf & SYSC_HAS_ENAWAKEUP) | |
910 | _enable_wakeup(oh, &v); | |
911 | if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) | |
912 | idlemode = HWMOD_IDLEMODE_SMART_WKUP; | |
913 | else | |
914 | idlemode = HWMOD_IDLEMODE_SMART; | |
915 | } | |
63c85238 PW |
916 | _set_master_standbymode(oh, idlemode, &v); |
917 | } | |
918 | ||
a16b1f7f PW |
919 | /* |
920 | * XXX The clock framework should handle this, by | |
921 | * calling into this code. But this must wait until the | |
922 | * clock structures are tagged with omap_hwmod entries | |
923 | */ | |
43b40992 PW |
924 | if ((oh->flags & HWMOD_SET_DEFAULT_CLOCKACT) && |
925 | (sf & SYSC_HAS_CLOCKACTIVITY)) | |
926 | _set_clockactivity(oh, oh->class->sysc->clockact, &v); | |
63c85238 | 927 | |
9980ce53 RN |
928 | /* If slave is in SMARTIDLE, also enable wakeup */ |
929 | if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE)) | |
5a7ddcbd KH |
930 | _enable_wakeup(oh, &v); |
931 | ||
932 | _write_sysconfig(v, oh); | |
78f26e87 HH |
933 | |
934 | /* | |
935 | * Set the autoidle bit only after setting the smartidle bit | |
936 | * Setting this will not have any impact on the other modules. | |
937 | */ | |
938 | if (sf & SYSC_HAS_AUTOIDLE) { | |
939 | idlemode = (oh->flags & HWMOD_NO_OCP_AUTOIDLE) ? | |
940 | 0 : 1; | |
941 | _set_module_autoidle(oh, idlemode, &v); | |
942 | _write_sysconfig(v, oh); | |
943 | } | |
63c85238 PW |
944 | } |
945 | ||
946 | /** | |
74ff3a68 | 947 | * _idle_sysc - try to put a module into idle via OCP_SYSCONFIG |
63c85238 PW |
948 | * @oh: struct omap_hwmod * |
949 | * | |
950 | * If module is marked as SWSUP_SIDLE, force the module into slave | |
951 | * idle; otherwise, configure it for smart-idle. If module is marked | |
952 | * as SWSUP_MSUSPEND, force the module into master standby; otherwise, | |
953 | * configure it for smart-standby. No return value. | |
954 | */ | |
74ff3a68 | 955 | static void _idle_sysc(struct omap_hwmod *oh) |
63c85238 | 956 | { |
43b40992 | 957 | u8 idlemode, sf; |
63c85238 PW |
958 | u32 v; |
959 | ||
43b40992 | 960 | if (!oh->class->sysc) |
63c85238 PW |
961 | return; |
962 | ||
963 | v = oh->_sysc_cache; | |
43b40992 | 964 | sf = oh->class->sysc->sysc_flags; |
63c85238 | 965 | |
43b40992 | 966 | if (sf & SYSC_HAS_SIDLEMODE) { |
63c85238 PW |
967 | idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ? |
968 | HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART; | |
969 | _set_slave_idlemode(oh, idlemode, &v); | |
970 | } | |
971 | ||
43b40992 | 972 | if (sf & SYSC_HAS_MIDLEMODE) { |
724019b0 BC |
973 | if (oh->flags & HWMOD_SWSUP_MSTANDBY) { |
974 | idlemode = HWMOD_IDLEMODE_FORCE; | |
975 | } else { | |
976 | if (sf & SYSC_HAS_ENAWAKEUP) | |
977 | _enable_wakeup(oh, &v); | |
978 | if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) | |
979 | idlemode = HWMOD_IDLEMODE_SMART_WKUP; | |
980 | else | |
981 | idlemode = HWMOD_IDLEMODE_SMART; | |
982 | } | |
63c85238 PW |
983 | _set_master_standbymode(oh, idlemode, &v); |
984 | } | |
985 | ||
86009eb3 BC |
986 | /* If slave is in SMARTIDLE, also enable wakeup */ |
987 | if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE)) | |
988 | _enable_wakeup(oh, &v); | |
989 | ||
63c85238 PW |
990 | _write_sysconfig(v, oh); |
991 | } | |
992 | ||
993 | /** | |
74ff3a68 | 994 | * _shutdown_sysc - force a module into idle via OCP_SYSCONFIG |
63c85238 PW |
995 | * @oh: struct omap_hwmod * |
996 | * | |
997 | * Force the module into slave idle and master suspend. No return | |
998 | * value. | |
999 | */ | |
74ff3a68 | 1000 | static void _shutdown_sysc(struct omap_hwmod *oh) |
63c85238 PW |
1001 | { |
1002 | u32 v; | |
43b40992 | 1003 | u8 sf; |
63c85238 | 1004 | |
43b40992 | 1005 | if (!oh->class->sysc) |
63c85238 PW |
1006 | return; |
1007 | ||
1008 | v = oh->_sysc_cache; | |
43b40992 | 1009 | sf = oh->class->sysc->sysc_flags; |
63c85238 | 1010 | |
43b40992 | 1011 | if (sf & SYSC_HAS_SIDLEMODE) |
63c85238 PW |
1012 | _set_slave_idlemode(oh, HWMOD_IDLEMODE_FORCE, &v); |
1013 | ||
43b40992 | 1014 | if (sf & SYSC_HAS_MIDLEMODE) |
63c85238 PW |
1015 | _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v); |
1016 | ||
43b40992 | 1017 | if (sf & SYSC_HAS_AUTOIDLE) |
726072e5 | 1018 | _set_module_autoidle(oh, 1, &v); |
63c85238 PW |
1019 | |
1020 | _write_sysconfig(v, oh); | |
1021 | } | |
1022 | ||
1023 | /** | |
1024 | * _lookup - find an omap_hwmod by name | |
1025 | * @name: find an omap_hwmod by name | |
1026 | * | |
1027 | * Return a pointer to an omap_hwmod by name, or NULL if not found. | |
63c85238 PW |
1028 | */ |
1029 | static struct omap_hwmod *_lookup(const char *name) | |
1030 | { | |
1031 | struct omap_hwmod *oh, *temp_oh; | |
1032 | ||
1033 | oh = NULL; | |
1034 | ||
1035 | list_for_each_entry(temp_oh, &omap_hwmod_list, node) { | |
1036 | if (!strcmp(name, temp_oh->name)) { | |
1037 | oh = temp_oh; | |
1038 | break; | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | return oh; | |
1043 | } | |
6ae76997 BC |
1044 | /** |
1045 | * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod | |
1046 | * @oh: struct omap_hwmod * | |
1047 | * | |
1048 | * Convert a clockdomain name stored in a struct omap_hwmod into a | |
1049 | * clockdomain pointer, and save it into the struct omap_hwmod. | |
1050 | * return -EINVAL if clkdm_name does not exist or if the lookup failed. | |
1051 | */ | |
1052 | static int _init_clkdm(struct omap_hwmod *oh) | |
1053 | { | |
1054 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) | |
1055 | return 0; | |
1056 | ||
1057 | if (!oh->clkdm_name) { | |
1058 | pr_warning("omap_hwmod: %s: no clkdm_name\n", oh->name); | |
1059 | return -EINVAL; | |
1060 | } | |
1061 | ||
1062 | oh->clkdm = clkdm_lookup(oh->clkdm_name); | |
1063 | if (!oh->clkdm) { | |
1064 | pr_warning("omap_hwmod: %s: could not associate to clkdm %s\n", | |
1065 | oh->name, oh->clkdm_name); | |
1066 | return -EINVAL; | |
1067 | } | |
1068 | ||
1069 | pr_debug("omap_hwmod: %s: associated to clkdm %s\n", | |
1070 | oh->name, oh->clkdm_name); | |
1071 | ||
1072 | return 0; | |
1073 | } | |
63c85238 PW |
1074 | |
1075 | /** | |
6ae76997 BC |
1076 | * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as |
1077 | * well the clockdomain. | |
63c85238 | 1078 | * @oh: struct omap_hwmod * |
97d60162 | 1079 | * @data: not used; pass NULL |
63c85238 | 1080 | * |
a2debdbd | 1081 | * Called by omap_hwmod_setup_*() (after omap2_clk_init()). |
48d54f3f PW |
1082 | * Resolves all clock names embedded in the hwmod. Returns 0 on |
1083 | * success, or a negative error code on failure. | |
63c85238 | 1084 | */ |
97d60162 | 1085 | static int _init_clocks(struct omap_hwmod *oh, void *data) |
63c85238 PW |
1086 | { |
1087 | int ret = 0; | |
1088 | ||
48d54f3f PW |
1089 | if (oh->_state != _HWMOD_STATE_REGISTERED) |
1090 | return 0; | |
63c85238 PW |
1091 | |
1092 | pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name); | |
1093 | ||
1094 | ret |= _init_main_clk(oh); | |
1095 | ret |= _init_interface_clks(oh); | |
1096 | ret |= _init_opt_clks(oh); | |
6ae76997 | 1097 | ret |= _init_clkdm(oh); |
63c85238 | 1098 | |
f5c1f84b BC |
1099 | if (!ret) |
1100 | oh->_state = _HWMOD_STATE_CLKS_INITED; | |
6652271a BC |
1101 | else |
1102 | pr_warning("omap_hwmod: %s: cannot _init_clocks\n", oh->name); | |
63c85238 | 1103 | |
09c35f2f | 1104 | return ret; |
63c85238 PW |
1105 | } |
1106 | ||
1107 | /** | |
1108 | * _wait_target_ready - wait for a module to leave slave idle | |
1109 | * @oh: struct omap_hwmod * | |
1110 | * | |
1111 | * Wait for a module @oh to leave slave idle. Returns 0 if the module | |
1112 | * does not have an IDLEST bit or if the module successfully leaves | |
1113 | * slave idle; otherwise, pass along the return value of the | |
d0f0631d | 1114 | * appropriate *_cm*_wait_module_ready() function. |
63c85238 PW |
1115 | */ |
1116 | static int _wait_target_ready(struct omap_hwmod *oh) | |
1117 | { | |
1118 | struct omap_hwmod_ocp_if *os; | |
1119 | int ret; | |
1120 | ||
1121 | if (!oh) | |
1122 | return -EINVAL; | |
1123 | ||
1124 | if (oh->_int_flags & _HWMOD_NO_MPU_PORT) | |
1125 | return 0; | |
1126 | ||
682fdc96 | 1127 | os = oh->slaves[oh->_mpu_port_index]; |
63c85238 | 1128 | |
33f7ec81 | 1129 | if (oh->flags & HWMOD_NO_IDLEST) |
63c85238 PW |
1130 | return 0; |
1131 | ||
1132 | /* XXX check module SIDLEMODE */ | |
1133 | ||
1134 | /* XXX check clock enable states */ | |
1135 | ||
1136 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) { | |
1137 | ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs, | |
1138 | oh->prcm.omap2.idlest_reg_id, | |
1139 | oh->prcm.omap2.idlest_idle_bit); | |
63c85238 | 1140 | } else if (cpu_is_omap44xx()) { |
d0f0631d BC |
1141 | if (!oh->clkdm) |
1142 | return -EINVAL; | |
1143 | ||
1144 | ret = omap4_cminst_wait_module_ready(oh->clkdm->prcm_partition, | |
1145 | oh->clkdm->cm_inst, | |
1146 | oh->clkdm->clkdm_offs, | |
1147 | oh->prcm.omap4.clkctrl_offs); | |
63c85238 PW |
1148 | } else { |
1149 | BUG(); | |
1150 | }; | |
1151 | ||
1152 | return ret; | |
1153 | } | |
1154 | ||
11b10341 BC |
1155 | /** |
1156 | * _wait_target_disable - wait for a module to be disabled | |
1157 | * @oh: struct omap_hwmod * | |
1158 | * | |
1159 | * Wait for a module @oh to enter slave idle. Returns 0 if the module | |
1160 | * does not have an IDLEST bit or if the module successfully enters | |
1161 | * slave idle; otherwise, pass along the return value of the | |
1162 | * appropriate *_cm*_wait_module_idle() function. | |
1163 | */ | |
1164 | static int _wait_target_disable(struct omap_hwmod *oh) | |
1165 | { | |
1166 | /* TODO: For now just handle OMAP4+ */ | |
1167 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) | |
1168 | return 0; | |
1169 | ||
1170 | if (!oh) | |
1171 | return -EINVAL; | |
1172 | ||
1173 | if (oh->_int_flags & _HWMOD_NO_MPU_PORT) | |
1174 | return 0; | |
1175 | ||
1176 | if (oh->flags & HWMOD_NO_IDLEST) | |
1177 | return 0; | |
1178 | ||
1179 | return omap4_cminst_wait_module_idle(oh->clkdm->prcm_partition, | |
1180 | oh->clkdm->cm_inst, | |
1181 | oh->clkdm->clkdm_offs, | |
1182 | oh->prcm.omap4.clkctrl_offs); | |
1183 | } | |
1184 | ||
5365efbe | 1185 | /** |
cc1226e7 | 1186 | * _lookup_hardreset - fill register bit info for this hwmod/reset line |
5365efbe BC |
1187 | * @oh: struct omap_hwmod * |
1188 | * @name: name of the reset line in the context of this hwmod | |
cc1226e7 | 1189 | * @ohri: struct omap_hwmod_rst_info * that this function will fill in |
5365efbe BC |
1190 | * |
1191 | * Return the bit position of the reset line that match the | |
1192 | * input name. Return -ENOENT if not found. | |
1193 | */ | |
cc1226e7 | 1194 | static u8 _lookup_hardreset(struct omap_hwmod *oh, const char *name, |
1195 | struct omap_hwmod_rst_info *ohri) | |
5365efbe BC |
1196 | { |
1197 | int i; | |
1198 | ||
1199 | for (i = 0; i < oh->rst_lines_cnt; i++) { | |
1200 | const char *rst_line = oh->rst_lines[i].name; | |
1201 | if (!strcmp(rst_line, name)) { | |
cc1226e7 | 1202 | ohri->rst_shift = oh->rst_lines[i].rst_shift; |
1203 | ohri->st_shift = oh->rst_lines[i].st_shift; | |
1204 | pr_debug("omap_hwmod: %s: %s: %s: rst %d st %d\n", | |
1205 | oh->name, __func__, rst_line, ohri->rst_shift, | |
1206 | ohri->st_shift); | |
5365efbe | 1207 | |
cc1226e7 | 1208 | return 0; |
5365efbe BC |
1209 | } |
1210 | } | |
1211 | ||
1212 | return -ENOENT; | |
1213 | } | |
1214 | ||
1215 | /** | |
1216 | * _assert_hardreset - assert the HW reset line of submodules | |
1217 | * contained in the hwmod module. | |
1218 | * @oh: struct omap_hwmod * | |
1219 | * @name: name of the reset line to lookup and assert | |
1220 | * | |
1221 | * Some IP like dsp, ipu or iva contain processor that require | |
1222 | * an HW reset line to be assert / deassert in order to enable fully | |
1223 | * the IP. | |
1224 | */ | |
1225 | static int _assert_hardreset(struct omap_hwmod *oh, const char *name) | |
1226 | { | |
cc1226e7 | 1227 | struct omap_hwmod_rst_info ohri; |
1228 | u8 ret; | |
5365efbe BC |
1229 | |
1230 | if (!oh) | |
1231 | return -EINVAL; | |
1232 | ||
cc1226e7 | 1233 | ret = _lookup_hardreset(oh, name, &ohri); |
1234 | if (IS_ERR_VALUE(ret)) | |
1235 | return ret; | |
5365efbe BC |
1236 | |
1237 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) | |
1238 | return omap2_prm_assert_hardreset(oh->prcm.omap2.module_offs, | |
cc1226e7 | 1239 | ohri.rst_shift); |
5365efbe | 1240 | else if (cpu_is_omap44xx()) |
eaac329d BC |
1241 | return omap4_prminst_assert_hardreset(ohri.rst_shift, |
1242 | oh->clkdm->pwrdm.ptr->prcm_partition, | |
1243 | oh->clkdm->pwrdm.ptr->prcm_offs, | |
1244 | oh->prcm.omap4.rstctrl_offs); | |
5365efbe BC |
1245 | else |
1246 | return -EINVAL; | |
1247 | } | |
1248 | ||
1249 | /** | |
1250 | * _deassert_hardreset - deassert the HW reset line of submodules contained | |
1251 | * in the hwmod module. | |
1252 | * @oh: struct omap_hwmod * | |
1253 | * @name: name of the reset line to look up and deassert | |
1254 | * | |
1255 | * Some IP like dsp, ipu or iva contain processor that require | |
1256 | * an HW reset line to be assert / deassert in order to enable fully | |
1257 | * the IP. | |
1258 | */ | |
1259 | static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) | |
1260 | { | |
cc1226e7 | 1261 | struct omap_hwmod_rst_info ohri; |
1262 | int ret; | |
5365efbe BC |
1263 | |
1264 | if (!oh) | |
1265 | return -EINVAL; | |
1266 | ||
cc1226e7 | 1267 | ret = _lookup_hardreset(oh, name, &ohri); |
1268 | if (IS_ERR_VALUE(ret)) | |
1269 | return ret; | |
5365efbe | 1270 | |
cc1226e7 | 1271 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) { |
1272 | ret = omap2_prm_deassert_hardreset(oh->prcm.omap2.module_offs, | |
1273 | ohri.rst_shift, | |
1274 | ohri.st_shift); | |
1275 | } else if (cpu_is_omap44xx()) { | |
1276 | if (ohri.st_shift) | |
1277 | pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n", | |
1278 | oh->name, name); | |
eaac329d BC |
1279 | ret = omap4_prminst_deassert_hardreset(ohri.rst_shift, |
1280 | oh->clkdm->pwrdm.ptr->prcm_partition, | |
1281 | oh->clkdm->pwrdm.ptr->prcm_offs, | |
1282 | oh->prcm.omap4.rstctrl_offs); | |
cc1226e7 | 1283 | } else { |
5365efbe | 1284 | return -EINVAL; |
cc1226e7 | 1285 | } |
5365efbe | 1286 | |
cc1226e7 | 1287 | if (ret == -EBUSY) |
5365efbe BC |
1288 | pr_warning("omap_hwmod: %s: failed to hardreset\n", oh->name); |
1289 | ||
cc1226e7 | 1290 | return ret; |
5365efbe BC |
1291 | } |
1292 | ||
1293 | /** | |
1294 | * _read_hardreset - read the HW reset line state of submodules | |
1295 | * contained in the hwmod module | |
1296 | * @oh: struct omap_hwmod * | |
1297 | * @name: name of the reset line to look up and read | |
1298 | * | |
1299 | * Return the state of the reset line. | |
1300 | */ | |
1301 | static int _read_hardreset(struct omap_hwmod *oh, const char *name) | |
1302 | { | |
cc1226e7 | 1303 | struct omap_hwmod_rst_info ohri; |
1304 | u8 ret; | |
5365efbe BC |
1305 | |
1306 | if (!oh) | |
1307 | return -EINVAL; | |
1308 | ||
cc1226e7 | 1309 | ret = _lookup_hardreset(oh, name, &ohri); |
1310 | if (IS_ERR_VALUE(ret)) | |
1311 | return ret; | |
5365efbe BC |
1312 | |
1313 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) { | |
1314 | return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs, | |
cc1226e7 | 1315 | ohri.st_shift); |
5365efbe | 1316 | } else if (cpu_is_omap44xx()) { |
eaac329d BC |
1317 | return omap4_prminst_is_hardreset_asserted(ohri.rst_shift, |
1318 | oh->clkdm->pwrdm.ptr->prcm_partition, | |
1319 | oh->clkdm->pwrdm.ptr->prcm_offs, | |
1320 | oh->prcm.omap4.rstctrl_offs); | |
5365efbe BC |
1321 | } else { |
1322 | return -EINVAL; | |
1323 | } | |
1324 | } | |
1325 | ||
63c85238 | 1326 | /** |
bd36179e | 1327 | * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit |
63c85238 PW |
1328 | * @oh: struct omap_hwmod * |
1329 | * | |
1330 | * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be | |
12b1fdb4 KH |
1331 | * enabled for this to work. Returns -EINVAL if the hwmod cannot be |
1332 | * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if | |
1333 | * the module did not reset in time, or 0 upon success. | |
2cb06814 BC |
1334 | * |
1335 | * In OMAP3 a specific SYSSTATUS register is used to get the reset status. | |
bd36179e | 1336 | * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead |
2cb06814 BC |
1337 | * use the SYSCONFIG softreset bit to provide the status. |
1338 | * | |
bd36179e PW |
1339 | * Note that some IP like McBSP do have reset control but don't have |
1340 | * reset status. | |
63c85238 | 1341 | */ |
bd36179e | 1342 | static int _ocp_softreset(struct omap_hwmod *oh) |
63c85238 | 1343 | { |
96835af9 | 1344 | u32 v; |
6f8b7ff5 | 1345 | int c = 0; |
96835af9 | 1346 | int ret = 0; |
63c85238 | 1347 | |
43b40992 | 1348 | if (!oh->class->sysc || |
2cb06814 | 1349 | !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) |
63c85238 PW |
1350 | return -EINVAL; |
1351 | ||
1352 | /* clocks must be on for this operation */ | |
1353 | if (oh->_state != _HWMOD_STATE_ENABLED) { | |
76e5589e BC |
1354 | pr_warning("omap_hwmod: %s: reset can only be entered from " |
1355 | "enabled state\n", oh->name); | |
63c85238 PW |
1356 | return -EINVAL; |
1357 | } | |
1358 | ||
96835af9 BC |
1359 | /* For some modules, all optionnal clocks need to be enabled as well */ |
1360 | if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) | |
1361 | _enable_optional_clocks(oh); | |
1362 | ||
bd36179e | 1363 | pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh->name); |
63c85238 PW |
1364 | |
1365 | v = oh->_sysc_cache; | |
96835af9 BC |
1366 | ret = _set_softreset(oh, &v); |
1367 | if (ret) | |
1368 | goto dis_opt_clks; | |
63c85238 PW |
1369 | _write_sysconfig(v, oh); |
1370 | ||
2cb06814 | 1371 | if (oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS) |
cc7a1d2a | 1372 | omap_test_timeout((omap_hwmod_read(oh, |
2cb06814 BC |
1373 | oh->class->sysc->syss_offs) |
1374 | & SYSS_RESETDONE_MASK), | |
1375 | MAX_MODULE_SOFTRESET_WAIT, c); | |
1376 | else if (oh->class->sysc->sysc_flags & SYSC_HAS_RESET_STATUS) | |
cc7a1d2a | 1377 | omap_test_timeout(!(omap_hwmod_read(oh, |
2cb06814 BC |
1378 | oh->class->sysc->sysc_offs) |
1379 | & SYSC_TYPE2_SOFTRESET_MASK), | |
1380 | MAX_MODULE_SOFTRESET_WAIT, c); | |
63c85238 | 1381 | |
5365efbe | 1382 | if (c == MAX_MODULE_SOFTRESET_WAIT) |
76e5589e BC |
1383 | pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n", |
1384 | oh->name, MAX_MODULE_SOFTRESET_WAIT); | |
63c85238 | 1385 | else |
5365efbe | 1386 | pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh->name, c); |
63c85238 PW |
1387 | |
1388 | /* | |
1389 | * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from | |
1390 | * _wait_target_ready() or _reset() | |
1391 | */ | |
1392 | ||
96835af9 BC |
1393 | ret = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; |
1394 | ||
1395 | dis_opt_clks: | |
1396 | if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) | |
1397 | _disable_optional_clocks(oh); | |
1398 | ||
1399 | return ret; | |
63c85238 PW |
1400 | } |
1401 | ||
bd36179e PW |
1402 | /** |
1403 | * _reset - reset an omap_hwmod | |
1404 | * @oh: struct omap_hwmod * | |
1405 | * | |
1406 | * Resets an omap_hwmod @oh. The default software reset mechanism for | |
1407 | * most OMAP IP blocks is triggered via the OCP_SYSCONFIG.SOFTRESET | |
1408 | * bit. However, some hwmods cannot be reset via this method: some | |
1409 | * are not targets and therefore have no OCP header registers to | |
1410 | * access; others (like the IVA) have idiosyncratic reset sequences. | |
1411 | * So for these relatively rare cases, custom reset code can be | |
1412 | * supplied in the struct omap_hwmod_class .reset function pointer. | |
1413 | * Passes along the return value from either _reset() or the custom | |
1414 | * reset function - these must return -EINVAL if the hwmod cannot be | |
1415 | * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if | |
1416 | * the module did not reset in time, or 0 upon success. | |
1417 | */ | |
1418 | static int _reset(struct omap_hwmod *oh) | |
1419 | { | |
1420 | int ret; | |
1421 | ||
1422 | pr_debug("omap_hwmod: %s: resetting\n", oh->name); | |
1423 | ||
1424 | ret = (oh->class->reset) ? oh->class->reset(oh) : _ocp_softreset(oh); | |
1425 | ||
1426 | return ret; | |
1427 | } | |
1428 | ||
63c85238 | 1429 | /** |
dc6d1cda | 1430 | * _enable - enable an omap_hwmod |
63c85238 PW |
1431 | * @oh: struct omap_hwmod * |
1432 | * | |
1433 | * Enables an omap_hwmod @oh such that the MPU can access the hwmod's | |
dc6d1cda PW |
1434 | * register target. Returns -EINVAL if the hwmod is in the wrong |
1435 | * state or passes along the return value of _wait_target_ready(). | |
63c85238 | 1436 | */ |
dc6d1cda | 1437 | static int _enable(struct omap_hwmod *oh) |
63c85238 PW |
1438 | { |
1439 | int r; | |
1440 | ||
34617e2a BC |
1441 | pr_debug("omap_hwmod: %s: enabling\n", oh->name); |
1442 | ||
63c85238 PW |
1443 | if (oh->_state != _HWMOD_STATE_INITIALIZED && |
1444 | oh->_state != _HWMOD_STATE_IDLE && | |
1445 | oh->_state != _HWMOD_STATE_DISABLED) { | |
1446 | WARN(1, "omap_hwmod: %s: enabled state can only be entered " | |
1447 | "from initialized, idle, or disabled state\n", oh->name); | |
1448 | return -EINVAL; | |
1449 | } | |
1450 | ||
8d9af88f | 1451 | /* Mux pins for device runtime if populated */ |
029268e4 TL |
1452 | if (oh->mux && (!oh->mux->enabled || |
1453 | ((oh->_state == _HWMOD_STATE_IDLE) && | |
1454 | oh->mux->pads_dynamic))) | |
8d9af88f | 1455 | omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); |
63c85238 PW |
1456 | |
1457 | _add_initiator_dep(oh, mpu_oh); | |
1458 | _enable_clocks(oh); | |
1459 | ||
31f62866 BC |
1460 | /* |
1461 | * If an IP contains only one HW reset line, then de-assert it in order | |
1462 | * to allow the module state transition. Otherwise the PRCM will return | |
1463 | * Intransition status, and the init will failed. | |
1464 | */ | |
1465 | if ((oh->_state == _HWMOD_STATE_INITIALIZED || | |
1466 | oh->_state == _HWMOD_STATE_DISABLED) && oh->rst_lines_cnt == 1) | |
1467 | _deassert_hardreset(oh, oh->rst_lines[0].name); | |
63c85238 | 1468 | |
63c85238 | 1469 | r = _wait_target_ready(oh); |
34617e2a | 1470 | if (r) { |
9a23dfe1 BC |
1471 | pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", |
1472 | oh->name, r); | |
34617e2a BC |
1473 | _disable_clocks(oh); |
1474 | ||
1475 | return r; | |
1476 | } | |
45c38252 | 1477 | _enable_module(oh); |
34617e2a BC |
1478 | |
1479 | oh->_state = _HWMOD_STATE_ENABLED; | |
1480 | ||
1481 | /* Access the sysconfig only if the target is ready */ | |
1482 | if (oh->class->sysc) { | |
1483 | if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) | |
1484 | _update_sysc_cache(oh); | |
1485 | _enable_sysc(oh); | |
9a23dfe1 BC |
1486 | } |
1487 | ||
63c85238 PW |
1488 | return r; |
1489 | } | |
1490 | ||
1491 | /** | |
dc6d1cda | 1492 | * _idle - idle an omap_hwmod |
63c85238 PW |
1493 | * @oh: struct omap_hwmod * |
1494 | * | |
1495 | * Idles an omap_hwmod @oh. This should be called once the hwmod has | |
dc6d1cda PW |
1496 | * no further work. Returns -EINVAL if the hwmod is in the wrong |
1497 | * state or returns 0. | |
63c85238 | 1498 | */ |
dc6d1cda | 1499 | static int _idle(struct omap_hwmod *oh) |
63c85238 | 1500 | { |
11b10341 BC |
1501 | int ret; |
1502 | ||
34617e2a BC |
1503 | pr_debug("omap_hwmod: %s: idling\n", oh->name); |
1504 | ||
63c85238 PW |
1505 | if (oh->_state != _HWMOD_STATE_ENABLED) { |
1506 | WARN(1, "omap_hwmod: %s: idle state can only be entered from " | |
1507 | "enabled state\n", oh->name); | |
1508 | return -EINVAL; | |
1509 | } | |
1510 | ||
43b40992 | 1511 | if (oh->class->sysc) |
74ff3a68 | 1512 | _idle_sysc(oh); |
63c85238 | 1513 | _del_initiator_dep(oh, mpu_oh); |
45c38252 | 1514 | _disable_module(oh); |
11b10341 BC |
1515 | ret = _wait_target_disable(oh); |
1516 | if (ret) | |
1517 | pr_warn("omap_hwmod: %s: _wait_target_disable failed\n", | |
1518 | oh->name); | |
45c38252 BC |
1519 | /* |
1520 | * The module must be in idle mode before disabling any parents | |
1521 | * clocks. Otherwise, the parent clock might be disabled before | |
1522 | * the module transition is done, and thus will prevent the | |
1523 | * transition to complete properly. | |
1524 | */ | |
1525 | _disable_clocks(oh); | |
63c85238 | 1526 | |
8d9af88f | 1527 | /* Mux pins for device idle if populated */ |
029268e4 | 1528 | if (oh->mux && oh->mux->pads_dynamic) |
8d9af88f TL |
1529 | omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); |
1530 | ||
63c85238 PW |
1531 | oh->_state = _HWMOD_STATE_IDLE; |
1532 | ||
1533 | return 0; | |
1534 | } | |
1535 | ||
9599217a KVA |
1536 | /** |
1537 | * omap_hwmod_set_ocp_autoidle - set the hwmod's OCP autoidle bit | |
1538 | * @oh: struct omap_hwmod * | |
1539 | * @autoidle: desired AUTOIDLE bitfield value (0 or 1) | |
1540 | * | |
1541 | * Sets the IP block's OCP autoidle bit in hardware, and updates our | |
1542 | * local copy. Intended to be used by drivers that require | |
1543 | * direct manipulation of the AUTOIDLE bits. | |
1544 | * Returns -EINVAL if @oh is null or is not in the ENABLED state, or passes | |
1545 | * along the return value from _set_module_autoidle(). | |
1546 | * | |
1547 | * Any users of this function should be scrutinized carefully. | |
1548 | */ | |
1549 | int omap_hwmod_set_ocp_autoidle(struct omap_hwmod *oh, u8 autoidle) | |
1550 | { | |
1551 | u32 v; | |
1552 | int retval = 0; | |
1553 | unsigned long flags; | |
1554 | ||
1555 | if (!oh || oh->_state != _HWMOD_STATE_ENABLED) | |
1556 | return -EINVAL; | |
1557 | ||
1558 | spin_lock_irqsave(&oh->_lock, flags); | |
1559 | ||
1560 | v = oh->_sysc_cache; | |
1561 | ||
1562 | retval = _set_module_autoidle(oh, autoidle, &v); | |
1563 | ||
1564 | if (!retval) | |
1565 | _write_sysconfig(v, oh); | |
1566 | ||
1567 | spin_unlock_irqrestore(&oh->_lock, flags); | |
1568 | ||
1569 | return retval; | |
1570 | } | |
1571 | ||
63c85238 PW |
1572 | /** |
1573 | * _shutdown - shutdown an omap_hwmod | |
1574 | * @oh: struct omap_hwmod * | |
1575 | * | |
1576 | * Shut down an omap_hwmod @oh. This should be called when the driver | |
1577 | * used for the hwmod is removed or unloaded or if the driver is not | |
1578 | * used by the system. Returns -EINVAL if the hwmod is in the wrong | |
1579 | * state or returns 0. | |
1580 | */ | |
1581 | static int _shutdown(struct omap_hwmod *oh) | |
1582 | { | |
e4dc8f50 PW |
1583 | int ret; |
1584 | u8 prev_state; | |
1585 | ||
63c85238 PW |
1586 | if (oh->_state != _HWMOD_STATE_IDLE && |
1587 | oh->_state != _HWMOD_STATE_ENABLED) { | |
1588 | WARN(1, "omap_hwmod: %s: disabled state can only be entered " | |
1589 | "from idle, or enabled state\n", oh->name); | |
1590 | return -EINVAL; | |
1591 | } | |
1592 | ||
1593 | pr_debug("omap_hwmod: %s: disabling\n", oh->name); | |
1594 | ||
e4dc8f50 PW |
1595 | if (oh->class->pre_shutdown) { |
1596 | prev_state = oh->_state; | |
1597 | if (oh->_state == _HWMOD_STATE_IDLE) | |
dc6d1cda | 1598 | _enable(oh); |
e4dc8f50 PW |
1599 | ret = oh->class->pre_shutdown(oh); |
1600 | if (ret) { | |
1601 | if (prev_state == _HWMOD_STATE_IDLE) | |
dc6d1cda | 1602 | _idle(oh); |
e4dc8f50 PW |
1603 | return ret; |
1604 | } | |
1605 | } | |
1606 | ||
6481c73c MV |
1607 | if (oh->class->sysc) { |
1608 | if (oh->_state == _HWMOD_STATE_IDLE) | |
1609 | _enable(oh); | |
74ff3a68 | 1610 | _shutdown_sysc(oh); |
6481c73c | 1611 | } |
5365efbe | 1612 | |
3827f949 BC |
1613 | /* clocks and deps are already disabled in idle */ |
1614 | if (oh->_state == _HWMOD_STATE_ENABLED) { | |
1615 | _del_initiator_dep(oh, mpu_oh); | |
1616 | /* XXX what about the other system initiators here? dma, dsp */ | |
45c38252 | 1617 | _disable_module(oh); |
11b10341 BC |
1618 | ret = _wait_target_disable(oh); |
1619 | if (ret) | |
1620 | pr_warn("omap_hwmod: %s: _wait_target_disable failed\n", | |
1621 | oh->name); | |
45c38252 | 1622 | _disable_clocks(oh); |
3827f949 | 1623 | } |
63c85238 PW |
1624 | /* XXX Should this code also force-disable the optional clocks? */ |
1625 | ||
31f62866 BC |
1626 | /* |
1627 | * If an IP contains only one HW reset line, then assert it | |
1628 | * after disabling the clocks and before shutting down the IP. | |
1629 | */ | |
1630 | if (oh->rst_lines_cnt == 1) | |
1631 | _assert_hardreset(oh, oh->rst_lines[0].name); | |
1632 | ||
8d9af88f TL |
1633 | /* Mux pins to safe mode or use populated off mode values */ |
1634 | if (oh->mux) | |
1635 | omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED); | |
63c85238 PW |
1636 | |
1637 | oh->_state = _HWMOD_STATE_DISABLED; | |
1638 | ||
1639 | return 0; | |
1640 | } | |
1641 | ||
63c85238 PW |
1642 | /** |
1643 | * _setup - do initial configuration of omap_hwmod | |
1644 | * @oh: struct omap_hwmod * | |
1645 | * | |
1646 | * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh | |
48d54f3f | 1647 | * OCP_SYSCONFIG register. Returns 0. |
63c85238 | 1648 | */ |
97d60162 | 1649 | static int _setup(struct omap_hwmod *oh, void *data) |
63c85238 | 1650 | { |
9a23dfe1 | 1651 | int i, r; |
2092e5cc | 1652 | u8 postsetup_state; |
97d60162 | 1653 | |
48d54f3f PW |
1654 | if (oh->_state != _HWMOD_STATE_CLKS_INITED) |
1655 | return 0; | |
1656 | ||
63c85238 PW |
1657 | /* Set iclk autoidle mode */ |
1658 | if (oh->slaves_cnt > 0) { | |
682fdc96 BC |
1659 | for (i = 0; i < oh->slaves_cnt; i++) { |
1660 | struct omap_hwmod_ocp_if *os = oh->slaves[i]; | |
63c85238 PW |
1661 | struct clk *c = os->_clk; |
1662 | ||
4d3ae5a9 | 1663 | if (!c) |
63c85238 PW |
1664 | continue; |
1665 | ||
1666 | if (os->flags & OCPIF_SWSUP_IDLE) { | |
1667 | /* XXX omap_iclk_deny_idle(c); */ | |
1668 | } else { | |
1669 | /* XXX omap_iclk_allow_idle(c); */ | |
1670 | clk_enable(c); | |
1671 | } | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | oh->_state = _HWMOD_STATE_INITIALIZED; | |
1676 | ||
5365efbe BC |
1677 | /* |
1678 | * In the case of hwmod with hardreset that should not be | |
1679 | * de-assert at boot time, we have to keep the module | |
1680 | * initialized, because we cannot enable it properly with the | |
1681 | * reset asserted. Exit without warning because that behavior is | |
1682 | * expected. | |
1683 | */ | |
1684 | if ((oh->flags & HWMOD_INIT_NO_RESET) && oh->rst_lines_cnt == 1) | |
1685 | return 0; | |
1686 | ||
dc6d1cda | 1687 | r = _enable(oh); |
9a23dfe1 BC |
1688 | if (r) { |
1689 | pr_warning("omap_hwmod: %s: cannot be enabled (%d)\n", | |
1690 | oh->name, oh->_state); | |
1691 | return 0; | |
1692 | } | |
63c85238 | 1693 | |
b835d014 | 1694 | if (!(oh->flags & HWMOD_INIT_NO_RESET)) { |
76e5589e BC |
1695 | _reset(oh); |
1696 | ||
b835d014 | 1697 | /* |
76e5589e | 1698 | * OCP_SYSCONFIG bits need to be reprogrammed after a softreset. |
dc6d1cda | 1699 | * The _enable() function should be split to |
76e5589e | 1700 | * avoid the rewrite of the OCP_SYSCONFIG register. |
b835d014 | 1701 | */ |
43b40992 | 1702 | if (oh->class->sysc) { |
b835d014 | 1703 | _update_sysc_cache(oh); |
74ff3a68 | 1704 | _enable_sysc(oh); |
b835d014 PW |
1705 | } |
1706 | } | |
63c85238 | 1707 | |
2092e5cc PW |
1708 | postsetup_state = oh->_postsetup_state; |
1709 | if (postsetup_state == _HWMOD_STATE_UNKNOWN) | |
1710 | postsetup_state = _HWMOD_STATE_ENABLED; | |
1711 | ||
1712 | /* | |
1713 | * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data - | |
1714 | * it should be set by the core code as a runtime flag during startup | |
1715 | */ | |
1716 | if ((oh->flags & HWMOD_INIT_NO_IDLE) && | |
1717 | (postsetup_state == _HWMOD_STATE_IDLE)) | |
1718 | postsetup_state = _HWMOD_STATE_ENABLED; | |
1719 | ||
1720 | if (postsetup_state == _HWMOD_STATE_IDLE) | |
dc6d1cda | 1721 | _idle(oh); |
2092e5cc PW |
1722 | else if (postsetup_state == _HWMOD_STATE_DISABLED) |
1723 | _shutdown(oh); | |
1724 | else if (postsetup_state != _HWMOD_STATE_ENABLED) | |
1725 | WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n", | |
1726 | oh->name, postsetup_state); | |
63c85238 PW |
1727 | |
1728 | return 0; | |
1729 | } | |
1730 | ||
63c85238 | 1731 | /** |
0102b627 | 1732 | * _register - register a struct omap_hwmod |
63c85238 PW |
1733 | * @oh: struct omap_hwmod * |
1734 | * | |
43b40992 PW |
1735 | * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod |
1736 | * already has been registered by the same name; -EINVAL if the | |
1737 | * omap_hwmod is in the wrong state, if @oh is NULL, if the | |
1738 | * omap_hwmod's class field is NULL; if the omap_hwmod is missing a | |
1739 | * name, or if the omap_hwmod's class is missing a name; or 0 upon | |
1740 | * success. | |
63c85238 PW |
1741 | * |
1742 | * XXX The data should be copied into bootmem, so the original data | |
1743 | * should be marked __initdata and freed after init. This would allow | |
1744 | * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note | |
1745 | * that the copy process would be relatively complex due to the large number | |
1746 | * of substructures. | |
1747 | */ | |
01592df9 | 1748 | static int __init _register(struct omap_hwmod *oh) |
63c85238 | 1749 | { |
569edd70 | 1750 | int ms_id; |
63c85238 | 1751 | |
43b40992 PW |
1752 | if (!oh || !oh->name || !oh->class || !oh->class->name || |
1753 | (oh->_state != _HWMOD_STATE_UNKNOWN)) | |
63c85238 PW |
1754 | return -EINVAL; |
1755 | ||
63c85238 PW |
1756 | pr_debug("omap_hwmod: %s: registering\n", oh->name); |
1757 | ||
ce35b244 BC |
1758 | if (_lookup(oh->name)) |
1759 | return -EEXIST; | |
63c85238 PW |
1760 | |
1761 | ms_id = _find_mpu_port_index(oh); | |
e7c7d760 | 1762 | if (!IS_ERR_VALUE(ms_id)) |
63c85238 | 1763 | oh->_mpu_port_index = ms_id; |
e7c7d760 | 1764 | else |
63c85238 | 1765 | oh->_int_flags |= _HWMOD_NO_MPU_PORT; |
63c85238 PW |
1766 | |
1767 | list_add_tail(&oh->node, &omap_hwmod_list); | |
1768 | ||
dc6d1cda | 1769 | spin_lock_init(&oh->_lock); |
2092e5cc | 1770 | |
63c85238 PW |
1771 | oh->_state = _HWMOD_STATE_REGISTERED; |
1772 | ||
569edd70 PW |
1773 | /* |
1774 | * XXX Rather than doing a strcmp(), this should test a flag | |
1775 | * set in the hwmod data, inserted by the autogenerator code. | |
1776 | */ | |
1777 | if (!strcmp(oh->name, MPU_INITIATOR_NAME)) | |
1778 | mpu_oh = oh; | |
63c85238 | 1779 | |
569edd70 | 1780 | return 0; |
63c85238 PW |
1781 | } |
1782 | ||
0102b627 BC |
1783 | |
1784 | /* Public functions */ | |
1785 | ||
1786 | u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs) | |
1787 | { | |
1788 | if (oh->flags & HWMOD_16BIT_REG) | |
1789 | return __raw_readw(oh->_mpu_rt_va + reg_offs); | |
1790 | else | |
1791 | return __raw_readl(oh->_mpu_rt_va + reg_offs); | |
1792 | } | |
1793 | ||
1794 | void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs) | |
1795 | { | |
1796 | if (oh->flags & HWMOD_16BIT_REG) | |
1797 | __raw_writew(v, oh->_mpu_rt_va + reg_offs); | |
1798 | else | |
1799 | __raw_writel(v, oh->_mpu_rt_va + reg_offs); | |
1800 | } | |
1801 | ||
6d3c55fd A |
1802 | /** |
1803 | * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit | |
1804 | * @oh: struct omap_hwmod * | |
1805 | * | |
1806 | * This is a public function exposed to drivers. Some drivers may need to do | |
1807 | * some settings before and after resetting the device. Those drivers after | |
1808 | * doing the necessary settings could use this function to start a reset by | |
1809 | * setting the SYSCONFIG.SOFTRESET bit. | |
1810 | */ | |
1811 | int omap_hwmod_softreset(struct omap_hwmod *oh) | |
1812 | { | |
1813 | u32 v; | |
1814 | int ret; | |
1815 | ||
1816 | if (!oh || !(oh->_sysc_cache)) | |
1817 | return -EINVAL; | |
1818 | ||
1819 | v = oh->_sysc_cache; | |
1820 | ret = _set_softreset(oh, &v); | |
1821 | if (ret) | |
1822 | goto error; | |
1823 | _write_sysconfig(v, oh); | |
1824 | ||
1825 | error: | |
1826 | return ret; | |
1827 | } | |
1828 | ||
0102b627 BC |
1829 | /** |
1830 | * omap_hwmod_set_slave_idlemode - set the hwmod's OCP slave idlemode | |
1831 | * @oh: struct omap_hwmod * | |
1832 | * @idlemode: SIDLEMODE field bits (shifted to bit 0) | |
1833 | * | |
1834 | * Sets the IP block's OCP slave idlemode in hardware, and updates our | |
1835 | * local copy. Intended to be used by drivers that have some erratum | |
1836 | * that requires direct manipulation of the SIDLEMODE bits. Returns | |
1837 | * -EINVAL if @oh is null, or passes along the return value from | |
1838 | * _set_slave_idlemode(). | |
1839 | * | |
1840 | * XXX Does this function have any current users? If not, we should | |
1841 | * remove it; it is better to let the rest of the hwmod code handle this. | |
1842 | * Any users of this function should be scrutinized carefully. | |
1843 | */ | |
1844 | int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode) | |
1845 | { | |
1846 | u32 v; | |
1847 | int retval = 0; | |
1848 | ||
1849 | if (!oh) | |
1850 | return -EINVAL; | |
1851 | ||
1852 | v = oh->_sysc_cache; | |
1853 | ||
1854 | retval = _set_slave_idlemode(oh, idlemode, &v); | |
1855 | if (!retval) | |
1856 | _write_sysconfig(v, oh); | |
1857 | ||
1858 | return retval; | |
1859 | } | |
1860 | ||
63c85238 PW |
1861 | /** |
1862 | * omap_hwmod_lookup - look up a registered omap_hwmod by name | |
1863 | * @name: name of the omap_hwmod to look up | |
1864 | * | |
1865 | * Given a @name of an omap_hwmod, return a pointer to the registered | |
1866 | * struct omap_hwmod *, or NULL upon error. | |
1867 | */ | |
1868 | struct omap_hwmod *omap_hwmod_lookup(const char *name) | |
1869 | { | |
1870 | struct omap_hwmod *oh; | |
1871 | ||
1872 | if (!name) | |
1873 | return NULL; | |
1874 | ||
63c85238 | 1875 | oh = _lookup(name); |
63c85238 PW |
1876 | |
1877 | return oh; | |
1878 | } | |
1879 | ||
1880 | /** | |
1881 | * omap_hwmod_for_each - call function for each registered omap_hwmod | |
1882 | * @fn: pointer to a callback function | |
97d60162 | 1883 | * @data: void * data to pass to callback function |
63c85238 PW |
1884 | * |
1885 | * Call @fn for each registered omap_hwmod, passing @data to each | |
1886 | * function. @fn must return 0 for success or any other value for | |
1887 | * failure. If @fn returns non-zero, the iteration across omap_hwmods | |
1888 | * will stop and the non-zero return value will be passed to the | |
1889 | * caller of omap_hwmod_for_each(). @fn is called with | |
1890 | * omap_hwmod_for_each() held. | |
1891 | */ | |
97d60162 PW |
1892 | int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data), |
1893 | void *data) | |
63c85238 PW |
1894 | { |
1895 | struct omap_hwmod *temp_oh; | |
30ebad9d | 1896 | int ret = 0; |
63c85238 PW |
1897 | |
1898 | if (!fn) | |
1899 | return -EINVAL; | |
1900 | ||
63c85238 | 1901 | list_for_each_entry(temp_oh, &omap_hwmod_list, node) { |
97d60162 | 1902 | ret = (*fn)(temp_oh, data); |
63c85238 PW |
1903 | if (ret) |
1904 | break; | |
1905 | } | |
63c85238 PW |
1906 | |
1907 | return ret; | |
1908 | } | |
1909 | ||
63c85238 | 1910 | /** |
550c8092 | 1911 | * omap_hwmod_register - register an array of hwmods |
63c85238 PW |
1912 | * @ohs: pointer to an array of omap_hwmods to register |
1913 | * | |
1914 | * Intended to be called early in boot before the clock framework is | |
1915 | * initialized. If @ohs is not null, will register all omap_hwmods | |
550c8092 | 1916 | * listed in @ohs that are valid for this chip. Returns 0. |
63c85238 | 1917 | */ |
550c8092 | 1918 | int __init omap_hwmod_register(struct omap_hwmod **ohs) |
63c85238 | 1919 | { |
bac1a0f0 | 1920 | int r, i; |
63c85238 PW |
1921 | |
1922 | if (!ohs) | |
1923 | return 0; | |
1924 | ||
bac1a0f0 PW |
1925 | i = 0; |
1926 | do { | |
1927 | if (!omap_chip_is(ohs[i]->omap_chip)) | |
1928 | continue; | |
1929 | ||
1930 | r = _register(ohs[i]); | |
1931 | WARN(r, "omap_hwmod: %s: _register returned %d\n", ohs[i]->name, | |
1932 | r); | |
1933 | } while (ohs[++i]); | |
63c85238 PW |
1934 | |
1935 | return 0; | |
1936 | } | |
1937 | ||
e7c7d760 TL |
1938 | /* |
1939 | * _populate_mpu_rt_base - populate the virtual address for a hwmod | |
1940 | * | |
a2debdbd | 1941 | * Must be called only from omap_hwmod_setup_*() so ioremap works properly. |
e7c7d760 | 1942 | * Assumes the caller takes care of locking if needed. |
63c85238 | 1943 | */ |
e7c7d760 TL |
1944 | static int __init _populate_mpu_rt_base(struct omap_hwmod *oh, void *data) |
1945 | { | |
48d54f3f PW |
1946 | if (oh->_state != _HWMOD_STATE_REGISTERED) |
1947 | return 0; | |
1948 | ||
e7c7d760 TL |
1949 | if (oh->_int_flags & _HWMOD_NO_MPU_PORT) |
1950 | return 0; | |
1951 | ||
1952 | oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); | |
e7c7d760 TL |
1953 | |
1954 | return 0; | |
1955 | } | |
1956 | ||
63c85238 | 1957 | /** |
a2debdbd PW |
1958 | * omap_hwmod_setup_one - set up a single hwmod |
1959 | * @oh_name: const char * name of the already-registered hwmod to set up | |
1960 | * | |
1961 | * Must be called after omap2_clk_init(). Resolves the struct clk | |
1962 | * names to struct clk pointers for each registered omap_hwmod. Also | |
1963 | * calls _setup() on each hwmod. Returns -EINVAL upon error or 0 upon | |
1964 | * success. | |
1965 | */ | |
1966 | int __init omap_hwmod_setup_one(const char *oh_name) | |
63c85238 PW |
1967 | { |
1968 | struct omap_hwmod *oh; | |
1969 | int r; | |
1970 | ||
a2debdbd PW |
1971 | pr_debug("omap_hwmod: %s: %s\n", oh_name, __func__); |
1972 | ||
1973 | if (!mpu_oh) { | |
1974 | pr_err("omap_hwmod: %s: cannot setup_one: MPU initiator hwmod %s not yet registered\n", | |
1975 | oh_name, MPU_INITIATOR_NAME); | |
63c85238 | 1976 | return -EINVAL; |
a2debdbd | 1977 | } |
63c85238 | 1978 | |
a2debdbd PW |
1979 | oh = _lookup(oh_name); |
1980 | if (!oh) { | |
1981 | WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name); | |
1982 | return -EINVAL; | |
1983 | } | |
63c85238 | 1984 | |
a2debdbd PW |
1985 | if (mpu_oh->_state == _HWMOD_STATE_REGISTERED && oh != mpu_oh) |
1986 | omap_hwmod_setup_one(MPU_INITIATOR_NAME); | |
63c85238 | 1987 | |
a2debdbd PW |
1988 | r = _populate_mpu_rt_base(oh, NULL); |
1989 | if (IS_ERR_VALUE(r)) { | |
1990 | WARN(1, "omap_hwmod: %s: couldn't set mpu_rt_base\n", oh_name); | |
1991 | return -EINVAL; | |
1992 | } | |
1993 | ||
1994 | r = _init_clocks(oh, NULL); | |
1995 | if (IS_ERR_VALUE(r)) { | |
1996 | WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh_name); | |
1997 | return -EINVAL; | |
63c85238 PW |
1998 | } |
1999 | ||
a2debdbd PW |
2000 | _setup(oh, NULL); |
2001 | ||
63c85238 PW |
2002 | return 0; |
2003 | } | |
2004 | ||
2005 | /** | |
550c8092 | 2006 | * omap_hwmod_setup - do some post-clock framework initialization |
63c85238 PW |
2007 | * |
2008 | * Must be called after omap2_clk_init(). Resolves the struct clk names | |
2009 | * to struct clk pointers for each registered omap_hwmod. Also calls | |
a2debdbd | 2010 | * _setup() on each hwmod. Returns 0 upon success. |
63c85238 | 2011 | */ |
550c8092 | 2012 | static int __init omap_hwmod_setup_all(void) |
63c85238 PW |
2013 | { |
2014 | int r; | |
2015 | ||
569edd70 PW |
2016 | if (!mpu_oh) { |
2017 | pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n", | |
2018 | __func__, MPU_INITIATOR_NAME); | |
2019 | return -EINVAL; | |
2020 | } | |
2021 | ||
e7c7d760 | 2022 | r = omap_hwmod_for_each(_populate_mpu_rt_base, NULL); |
63c85238 | 2023 | |
97d60162 | 2024 | r = omap_hwmod_for_each(_init_clocks, NULL); |
a2debdbd PW |
2025 | WARN(IS_ERR_VALUE(r), |
2026 | "omap_hwmod: %s: _init_clocks failed\n", __func__); | |
63c85238 | 2027 | |
2092e5cc | 2028 | omap_hwmod_for_each(_setup, NULL); |
63c85238 PW |
2029 | |
2030 | return 0; | |
2031 | } | |
550c8092 | 2032 | core_initcall(omap_hwmod_setup_all); |
63c85238 | 2033 | |
63c85238 PW |
2034 | /** |
2035 | * omap_hwmod_enable - enable an omap_hwmod | |
2036 | * @oh: struct omap_hwmod * | |
2037 | * | |
74ff3a68 | 2038 | * Enable an omap_hwmod @oh. Intended to be called by omap_device_enable(). |
63c85238 PW |
2039 | * Returns -EINVAL on error or passes along the return value from _enable(). |
2040 | */ | |
2041 | int omap_hwmod_enable(struct omap_hwmod *oh) | |
2042 | { | |
2043 | int r; | |
dc6d1cda | 2044 | unsigned long flags; |
63c85238 PW |
2045 | |
2046 | if (!oh) | |
2047 | return -EINVAL; | |
2048 | ||
dc6d1cda PW |
2049 | spin_lock_irqsave(&oh->_lock, flags); |
2050 | r = _enable(oh); | |
2051 | spin_unlock_irqrestore(&oh->_lock, flags); | |
63c85238 PW |
2052 | |
2053 | return r; | |
2054 | } | |
2055 | ||
2056 | /** | |
2057 | * omap_hwmod_idle - idle an omap_hwmod | |
2058 | * @oh: struct omap_hwmod * | |
2059 | * | |
74ff3a68 | 2060 | * Idle an omap_hwmod @oh. Intended to be called by omap_device_idle(). |
63c85238 PW |
2061 | * Returns -EINVAL on error or passes along the return value from _idle(). |
2062 | */ | |
2063 | int omap_hwmod_idle(struct omap_hwmod *oh) | |
2064 | { | |
dc6d1cda PW |
2065 | unsigned long flags; |
2066 | ||
63c85238 PW |
2067 | if (!oh) |
2068 | return -EINVAL; | |
2069 | ||
dc6d1cda PW |
2070 | spin_lock_irqsave(&oh->_lock, flags); |
2071 | _idle(oh); | |
2072 | spin_unlock_irqrestore(&oh->_lock, flags); | |
63c85238 PW |
2073 | |
2074 | return 0; | |
2075 | } | |
2076 | ||
2077 | /** | |
2078 | * omap_hwmod_shutdown - shutdown an omap_hwmod | |
2079 | * @oh: struct omap_hwmod * | |
2080 | * | |
74ff3a68 | 2081 | * Shutdown an omap_hwmod @oh. Intended to be called by |
63c85238 PW |
2082 | * omap_device_shutdown(). Returns -EINVAL on error or passes along |
2083 | * the return value from _shutdown(). | |
2084 | */ | |
2085 | int omap_hwmod_shutdown(struct omap_hwmod *oh) | |
2086 | { | |
dc6d1cda PW |
2087 | unsigned long flags; |
2088 | ||
63c85238 PW |
2089 | if (!oh) |
2090 | return -EINVAL; | |
2091 | ||
dc6d1cda | 2092 | spin_lock_irqsave(&oh->_lock, flags); |
63c85238 | 2093 | _shutdown(oh); |
dc6d1cda | 2094 | spin_unlock_irqrestore(&oh->_lock, flags); |
63c85238 PW |
2095 | |
2096 | return 0; | |
2097 | } | |
2098 | ||
2099 | /** | |
2100 | * omap_hwmod_enable_clocks - enable main_clk, all interface clocks | |
2101 | * @oh: struct omap_hwmod *oh | |
2102 | * | |
2103 | * Intended to be called by the omap_device code. | |
2104 | */ | |
2105 | int omap_hwmod_enable_clocks(struct omap_hwmod *oh) | |
2106 | { | |
dc6d1cda PW |
2107 | unsigned long flags; |
2108 | ||
2109 | spin_lock_irqsave(&oh->_lock, flags); | |
63c85238 | 2110 | _enable_clocks(oh); |
dc6d1cda | 2111 | spin_unlock_irqrestore(&oh->_lock, flags); |
63c85238 PW |
2112 | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | /** | |
2117 | * omap_hwmod_disable_clocks - disable main_clk, all interface clocks | |
2118 | * @oh: struct omap_hwmod *oh | |
2119 | * | |
2120 | * Intended to be called by the omap_device code. | |
2121 | */ | |
2122 | int omap_hwmod_disable_clocks(struct omap_hwmod *oh) | |
2123 | { | |
dc6d1cda PW |
2124 | unsigned long flags; |
2125 | ||
2126 | spin_lock_irqsave(&oh->_lock, flags); | |
63c85238 | 2127 | _disable_clocks(oh); |
dc6d1cda | 2128 | spin_unlock_irqrestore(&oh->_lock, flags); |
63c85238 PW |
2129 | |
2130 | return 0; | |
2131 | } | |
2132 | ||
2133 | /** | |
2134 | * omap_hwmod_ocp_barrier - wait for posted writes against the hwmod to complete | |
2135 | * @oh: struct omap_hwmod *oh | |
2136 | * | |
2137 | * Intended to be called by drivers and core code when all posted | |
2138 | * writes to a device must complete before continuing further | |
2139 | * execution (for example, after clearing some device IRQSTATUS | |
2140 | * register bits) | |
2141 | * | |
2142 | * XXX what about targets with multiple OCP threads? | |
2143 | */ | |
2144 | void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) | |
2145 | { | |
2146 | BUG_ON(!oh); | |
2147 | ||
43b40992 | 2148 | if (!oh->class->sysc || !oh->class->sysc->sysc_flags) { |
63c85238 PW |
2149 | WARN(1, "omap_device: %s: OCP barrier impossible due to " |
2150 | "device configuration\n", oh->name); | |
2151 | return; | |
2152 | } | |
2153 | ||
2154 | /* | |
2155 | * Forces posted writes to complete on the OCP thread handling | |
2156 | * register writes | |
2157 | */ | |
cc7a1d2a | 2158 | omap_hwmod_read(oh, oh->class->sysc->sysc_offs); |
63c85238 PW |
2159 | } |
2160 | ||
2161 | /** | |
2162 | * omap_hwmod_reset - reset the hwmod | |
2163 | * @oh: struct omap_hwmod * | |
2164 | * | |
2165 | * Under some conditions, a driver may wish to reset the entire device. | |
2166 | * Called from omap_device code. Returns -EINVAL on error or passes along | |
9b579114 | 2167 | * the return value from _reset(). |
63c85238 PW |
2168 | */ |
2169 | int omap_hwmod_reset(struct omap_hwmod *oh) | |
2170 | { | |
2171 | int r; | |
dc6d1cda | 2172 | unsigned long flags; |
63c85238 | 2173 | |
9b579114 | 2174 | if (!oh) |
63c85238 PW |
2175 | return -EINVAL; |
2176 | ||
dc6d1cda | 2177 | spin_lock_irqsave(&oh->_lock, flags); |
63c85238 | 2178 | r = _reset(oh); |
dc6d1cda | 2179 | spin_unlock_irqrestore(&oh->_lock, flags); |
63c85238 PW |
2180 | |
2181 | return r; | |
2182 | } | |
2183 | ||
2184 | /** | |
2185 | * omap_hwmod_count_resources - count number of struct resources needed by hwmod | |
2186 | * @oh: struct omap_hwmod * | |
2187 | * @res: pointer to the first element of an array of struct resource to fill | |
2188 | * | |
2189 | * Count the number of struct resource array elements necessary to | |
2190 | * contain omap_hwmod @oh resources. Intended to be called by code | |
2191 | * that registers omap_devices. Intended to be used to determine the | |
2192 | * size of a dynamically-allocated struct resource array, before | |
2193 | * calling omap_hwmod_fill_resources(). Returns the number of struct | |
2194 | * resource array elements needed. | |
2195 | * | |
2196 | * XXX This code is not optimized. It could attempt to merge adjacent | |
2197 | * resource IDs. | |
2198 | * | |
2199 | */ | |
2200 | int omap_hwmod_count_resources(struct omap_hwmod *oh) | |
2201 | { | |
2202 | int ret, i; | |
2203 | ||
bc614958 | 2204 | ret = _count_mpu_irqs(oh) + _count_sdma_reqs(oh); |
63c85238 PW |
2205 | |
2206 | for (i = 0; i < oh->slaves_cnt; i++) | |
78183f3f | 2207 | ret += _count_ocp_if_addr_spaces(oh->slaves[i]); |
63c85238 PW |
2208 | |
2209 | return ret; | |
2210 | } | |
2211 | ||
2212 | /** | |
2213 | * omap_hwmod_fill_resources - fill struct resource array with hwmod data | |
2214 | * @oh: struct omap_hwmod * | |
2215 | * @res: pointer to the first element of an array of struct resource to fill | |
2216 | * | |
2217 | * Fill the struct resource array @res with resource data from the | |
2218 | * omap_hwmod @oh. Intended to be called by code that registers | |
2219 | * omap_devices. See also omap_hwmod_count_resources(). Returns the | |
2220 | * number of array elements filled. | |
2221 | */ | |
2222 | int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) | |
2223 | { | |
bc614958 | 2224 | int i, j, mpu_irqs_cnt, sdma_reqs_cnt; |
63c85238 PW |
2225 | int r = 0; |
2226 | ||
2227 | /* For each IRQ, DMA, memory area, fill in array.*/ | |
2228 | ||
212738a4 PW |
2229 | mpu_irqs_cnt = _count_mpu_irqs(oh); |
2230 | for (i = 0; i < mpu_irqs_cnt; i++) { | |
718bfd76 PW |
2231 | (res + r)->name = (oh->mpu_irqs + i)->name; |
2232 | (res + r)->start = (oh->mpu_irqs + i)->irq; | |
2233 | (res + r)->end = (oh->mpu_irqs + i)->irq; | |
63c85238 PW |
2234 | (res + r)->flags = IORESOURCE_IRQ; |
2235 | r++; | |
2236 | } | |
2237 | ||
bc614958 PW |
2238 | sdma_reqs_cnt = _count_sdma_reqs(oh); |
2239 | for (i = 0; i < sdma_reqs_cnt; i++) { | |
9ee9fff9 BC |
2240 | (res + r)->name = (oh->sdma_reqs + i)->name; |
2241 | (res + r)->start = (oh->sdma_reqs + i)->dma_req; | |
2242 | (res + r)->end = (oh->sdma_reqs + i)->dma_req; | |
63c85238 PW |
2243 | (res + r)->flags = IORESOURCE_DMA; |
2244 | r++; | |
2245 | } | |
2246 | ||
2247 | for (i = 0; i < oh->slaves_cnt; i++) { | |
2248 | struct omap_hwmod_ocp_if *os; | |
78183f3f | 2249 | int addr_cnt; |
63c85238 | 2250 | |
682fdc96 | 2251 | os = oh->slaves[i]; |
78183f3f | 2252 | addr_cnt = _count_ocp_if_addr_spaces(os); |
63c85238 | 2253 | |
78183f3f | 2254 | for (j = 0; j < addr_cnt; j++) { |
cd503802 | 2255 | (res + r)->name = (os->addr + j)->name; |
63c85238 PW |
2256 | (res + r)->start = (os->addr + j)->pa_start; |
2257 | (res + r)->end = (os->addr + j)->pa_end; | |
2258 | (res + r)->flags = IORESOURCE_MEM; | |
2259 | r++; | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | return r; | |
2264 | } | |
2265 | ||
2266 | /** | |
2267 | * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain | |
2268 | * @oh: struct omap_hwmod * | |
2269 | * | |
2270 | * Return the powerdomain pointer associated with the OMAP module | |
2271 | * @oh's main clock. If @oh does not have a main clk, return the | |
2272 | * powerdomain associated with the interface clock associated with the | |
2273 | * module's MPU port. (XXX Perhaps this should use the SDMA port | |
2274 | * instead?) Returns NULL on error, or a struct powerdomain * on | |
2275 | * success. | |
2276 | */ | |
2277 | struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh) | |
2278 | { | |
2279 | struct clk *c; | |
2280 | ||
2281 | if (!oh) | |
2282 | return NULL; | |
2283 | ||
2284 | if (oh->_clk) { | |
2285 | c = oh->_clk; | |
2286 | } else { | |
2287 | if (oh->_int_flags & _HWMOD_NO_MPU_PORT) | |
2288 | return NULL; | |
2289 | c = oh->slaves[oh->_mpu_port_index]->_clk; | |
2290 | } | |
2291 | ||
d5647c18 TG |
2292 | if (!c->clkdm) |
2293 | return NULL; | |
2294 | ||
63c85238 PW |
2295 | return c->clkdm->pwrdm.ptr; |
2296 | ||
2297 | } | |
2298 | ||
db2a60bf PW |
2299 | /** |
2300 | * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU) | |
2301 | * @oh: struct omap_hwmod * | |
2302 | * | |
2303 | * Returns the virtual address corresponding to the beginning of the | |
2304 | * module's register target, in the address range that is intended to | |
2305 | * be used by the MPU. Returns the virtual address upon success or NULL | |
2306 | * upon error. | |
2307 | */ | |
2308 | void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh) | |
2309 | { | |
2310 | if (!oh) | |
2311 | return NULL; | |
2312 | ||
2313 | if (oh->_int_flags & _HWMOD_NO_MPU_PORT) | |
2314 | return NULL; | |
2315 | ||
2316 | if (oh->_state == _HWMOD_STATE_UNKNOWN) | |
2317 | return NULL; | |
2318 | ||
2319 | return oh->_mpu_rt_va; | |
2320 | } | |
2321 | ||
63c85238 PW |
2322 | /** |
2323 | * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh | |
2324 | * @oh: struct omap_hwmod * | |
2325 | * @init_oh: struct omap_hwmod * (initiator) | |
2326 | * | |
2327 | * Add a sleep dependency between the initiator @init_oh and @oh. | |
2328 | * Intended to be called by DSP/Bridge code via platform_data for the | |
2329 | * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge | |
2330 | * code needs to add/del initiator dependencies dynamically | |
2331 | * before/after accessing a device. Returns the return value from | |
2332 | * _add_initiator_dep(). | |
2333 | * | |
2334 | * XXX Keep a usecount in the clockdomain code | |
2335 | */ | |
2336 | int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh, | |
2337 | struct omap_hwmod *init_oh) | |
2338 | { | |
2339 | return _add_initiator_dep(oh, init_oh); | |
2340 | } | |
2341 | ||
2342 | /* | |
2343 | * XXX what about functions for drivers to save/restore ocp_sysconfig | |
2344 | * for context save/restore operations? | |
2345 | */ | |
2346 | ||
2347 | /** | |
2348 | * omap_hwmod_del_initiator_dep - remove sleepdep from @init_oh to @oh | |
2349 | * @oh: struct omap_hwmod * | |
2350 | * @init_oh: struct omap_hwmod * (initiator) | |
2351 | * | |
2352 | * Remove a sleep dependency between the initiator @init_oh and @oh. | |
2353 | * Intended to be called by DSP/Bridge code via platform_data for the | |
2354 | * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge | |
2355 | * code needs to add/del initiator dependencies dynamically | |
2356 | * before/after accessing a device. Returns the return value from | |
2357 | * _del_initiator_dep(). | |
2358 | * | |
2359 | * XXX Keep a usecount in the clockdomain code | |
2360 | */ | |
2361 | int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh, | |
2362 | struct omap_hwmod *init_oh) | |
2363 | { | |
2364 | return _del_initiator_dep(oh, init_oh); | |
2365 | } | |
2366 | ||
63c85238 PW |
2367 | /** |
2368 | * omap_hwmod_enable_wakeup - allow device to wake up the system | |
2369 | * @oh: struct omap_hwmod * | |
2370 | * | |
2371 | * Sets the module OCP socket ENAWAKEUP bit to allow the module to | |
2372 | * send wakeups to the PRCM. Eventually this should sets PRCM wakeup | |
2373 | * registers to cause the PRCM to receive wakeup events from the | |
2374 | * module. Does not set any wakeup routing registers beyond this | |
2375 | * point - if the module is to wake up any other module or subsystem, | |
2376 | * that must be set separately. Called by omap_device code. Returns | |
2377 | * -EINVAL on error or 0 upon success. | |
2378 | */ | |
2379 | int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) | |
2380 | { | |
dc6d1cda | 2381 | unsigned long flags; |
5a7ddcbd | 2382 | u32 v; |
dc6d1cda | 2383 | |
43b40992 PW |
2384 | if (!oh->class->sysc || |
2385 | !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) | |
63c85238 PW |
2386 | return -EINVAL; |
2387 | ||
dc6d1cda | 2388 | spin_lock_irqsave(&oh->_lock, flags); |
5a7ddcbd KH |
2389 | v = oh->_sysc_cache; |
2390 | _enable_wakeup(oh, &v); | |
2391 | _write_sysconfig(v, oh); | |
dc6d1cda | 2392 | spin_unlock_irqrestore(&oh->_lock, flags); |
63c85238 PW |
2393 | |
2394 | return 0; | |
2395 | } | |
2396 | ||
2397 | /** | |
2398 | * omap_hwmod_disable_wakeup - prevent device from waking the system | |
2399 | * @oh: struct omap_hwmod * | |
2400 | * | |
2401 | * Clears the module OCP socket ENAWAKEUP bit to prevent the module | |
2402 | * from sending wakeups to the PRCM. Eventually this should clear | |
2403 | * PRCM wakeup registers to cause the PRCM to ignore wakeup events | |
2404 | * from the module. Does not set any wakeup routing registers beyond | |
2405 | * this point - if the module is to wake up any other module or | |
2406 | * subsystem, that must be set separately. Called by omap_device | |
2407 | * code. Returns -EINVAL on error or 0 upon success. | |
2408 | */ | |
2409 | int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) | |
2410 | { | |
dc6d1cda | 2411 | unsigned long flags; |
5a7ddcbd | 2412 | u32 v; |
dc6d1cda | 2413 | |
43b40992 PW |
2414 | if (!oh->class->sysc || |
2415 | !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) | |
63c85238 PW |
2416 | return -EINVAL; |
2417 | ||
dc6d1cda | 2418 | spin_lock_irqsave(&oh->_lock, flags); |
5a7ddcbd KH |
2419 | v = oh->_sysc_cache; |
2420 | _disable_wakeup(oh, &v); | |
2421 | _write_sysconfig(v, oh); | |
dc6d1cda | 2422 | spin_unlock_irqrestore(&oh->_lock, flags); |
63c85238 PW |
2423 | |
2424 | return 0; | |
2425 | } | |
43b40992 | 2426 | |
aee48e3c PW |
2427 | /** |
2428 | * omap_hwmod_assert_hardreset - assert the HW reset line of submodules | |
2429 | * contained in the hwmod module. | |
2430 | * @oh: struct omap_hwmod * | |
2431 | * @name: name of the reset line to lookup and assert | |
2432 | * | |
2433 | * Some IP like dsp, ipu or iva contain processor that require | |
2434 | * an HW reset line to be assert / deassert in order to enable fully | |
2435 | * the IP. Returns -EINVAL if @oh is null or if the operation is not | |
2436 | * yet supported on this OMAP; otherwise, passes along the return value | |
2437 | * from _assert_hardreset(). | |
2438 | */ | |
2439 | int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name) | |
2440 | { | |
2441 | int ret; | |
dc6d1cda | 2442 | unsigned long flags; |
aee48e3c PW |
2443 | |
2444 | if (!oh) | |
2445 | return -EINVAL; | |
2446 | ||
dc6d1cda | 2447 | spin_lock_irqsave(&oh->_lock, flags); |
aee48e3c | 2448 | ret = _assert_hardreset(oh, name); |
dc6d1cda | 2449 | spin_unlock_irqrestore(&oh->_lock, flags); |
aee48e3c PW |
2450 | |
2451 | return ret; | |
2452 | } | |
2453 | ||
2454 | /** | |
2455 | * omap_hwmod_deassert_hardreset - deassert the HW reset line of submodules | |
2456 | * contained in the hwmod module. | |
2457 | * @oh: struct omap_hwmod * | |
2458 | * @name: name of the reset line to look up and deassert | |
2459 | * | |
2460 | * Some IP like dsp, ipu or iva contain processor that require | |
2461 | * an HW reset line to be assert / deassert in order to enable fully | |
2462 | * the IP. Returns -EINVAL if @oh is null or if the operation is not | |
2463 | * yet supported on this OMAP; otherwise, passes along the return value | |
2464 | * from _deassert_hardreset(). | |
2465 | */ | |
2466 | int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name) | |
2467 | { | |
2468 | int ret; | |
dc6d1cda | 2469 | unsigned long flags; |
aee48e3c PW |
2470 | |
2471 | if (!oh) | |
2472 | return -EINVAL; | |
2473 | ||
dc6d1cda | 2474 | spin_lock_irqsave(&oh->_lock, flags); |
aee48e3c | 2475 | ret = _deassert_hardreset(oh, name); |
dc6d1cda | 2476 | spin_unlock_irqrestore(&oh->_lock, flags); |
aee48e3c PW |
2477 | |
2478 | return ret; | |
2479 | } | |
2480 | ||
2481 | /** | |
2482 | * omap_hwmod_read_hardreset - read the HW reset line state of submodules | |
2483 | * contained in the hwmod module | |
2484 | * @oh: struct omap_hwmod * | |
2485 | * @name: name of the reset line to look up and read | |
2486 | * | |
2487 | * Return the current state of the hwmod @oh's reset line named @name: | |
2488 | * returns -EINVAL upon parameter error or if this operation | |
2489 | * is unsupported on the current OMAP; otherwise, passes along the return | |
2490 | * value from _read_hardreset(). | |
2491 | */ | |
2492 | int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name) | |
2493 | { | |
2494 | int ret; | |
dc6d1cda | 2495 | unsigned long flags; |
aee48e3c PW |
2496 | |
2497 | if (!oh) | |
2498 | return -EINVAL; | |
2499 | ||
dc6d1cda | 2500 | spin_lock_irqsave(&oh->_lock, flags); |
aee48e3c | 2501 | ret = _read_hardreset(oh, name); |
dc6d1cda | 2502 | spin_unlock_irqrestore(&oh->_lock, flags); |
aee48e3c PW |
2503 | |
2504 | return ret; | |
2505 | } | |
2506 | ||
2507 | ||
43b40992 PW |
2508 | /** |
2509 | * omap_hwmod_for_each_by_class - call @fn for each hwmod of class @classname | |
2510 | * @classname: struct omap_hwmod_class name to search for | |
2511 | * @fn: callback function pointer to call for each hwmod in class @classname | |
2512 | * @user: arbitrary context data to pass to the callback function | |
2513 | * | |
ce35b244 BC |
2514 | * For each omap_hwmod of class @classname, call @fn. |
2515 | * If the callback function returns something other than | |
43b40992 PW |
2516 | * zero, the iterator is terminated, and the callback function's return |
2517 | * value is passed back to the caller. Returns 0 upon success, -EINVAL | |
2518 | * if @classname or @fn are NULL, or passes back the error code from @fn. | |
2519 | */ | |
2520 | int omap_hwmod_for_each_by_class(const char *classname, | |
2521 | int (*fn)(struct omap_hwmod *oh, | |
2522 | void *user), | |
2523 | void *user) | |
2524 | { | |
2525 | struct omap_hwmod *temp_oh; | |
2526 | int ret = 0; | |
2527 | ||
2528 | if (!classname || !fn) | |
2529 | return -EINVAL; | |
2530 | ||
2531 | pr_debug("omap_hwmod: %s: looking for modules of class %s\n", | |
2532 | __func__, classname); | |
2533 | ||
43b40992 PW |
2534 | list_for_each_entry(temp_oh, &omap_hwmod_list, node) { |
2535 | if (!strcmp(temp_oh->class->name, classname)) { | |
2536 | pr_debug("omap_hwmod: %s: %s: calling callback fn\n", | |
2537 | __func__, temp_oh->name); | |
2538 | ret = (*fn)(temp_oh, user); | |
2539 | if (ret) | |
2540 | break; | |
2541 | } | |
2542 | } | |
2543 | ||
43b40992 PW |
2544 | if (ret) |
2545 | pr_debug("omap_hwmod: %s: iterator terminated early: %d\n", | |
2546 | __func__, ret); | |
2547 | ||
2548 | return ret; | |
2549 | } | |
2550 | ||
2092e5cc PW |
2551 | /** |
2552 | * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod | |
2553 | * @oh: struct omap_hwmod * | |
2554 | * @state: state that _setup() should leave the hwmod in | |
2555 | * | |
550c8092 | 2556 | * Sets the hwmod state that @oh will enter at the end of _setup() |
a2debdbd PW |
2557 | * (called by omap_hwmod_setup_*()). Only valid to call between |
2558 | * calling omap_hwmod_register() and omap_hwmod_setup_*(). Returns | |
550c8092 PW |
2559 | * 0 upon success or -EINVAL if there is a problem with the arguments |
2560 | * or if the hwmod is in the wrong state. | |
2092e5cc PW |
2561 | */ |
2562 | int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state) | |
2563 | { | |
2564 | int ret; | |
dc6d1cda | 2565 | unsigned long flags; |
2092e5cc PW |
2566 | |
2567 | if (!oh) | |
2568 | return -EINVAL; | |
2569 | ||
2570 | if (state != _HWMOD_STATE_DISABLED && | |
2571 | state != _HWMOD_STATE_ENABLED && | |
2572 | state != _HWMOD_STATE_IDLE) | |
2573 | return -EINVAL; | |
2574 | ||
dc6d1cda | 2575 | spin_lock_irqsave(&oh->_lock, flags); |
2092e5cc PW |
2576 | |
2577 | if (oh->_state != _HWMOD_STATE_REGISTERED) { | |
2578 | ret = -EINVAL; | |
2579 | goto ohsps_unlock; | |
2580 | } | |
2581 | ||
2582 | oh->_postsetup_state = state; | |
2583 | ret = 0; | |
2584 | ||
2585 | ohsps_unlock: | |
dc6d1cda | 2586 | spin_unlock_irqrestore(&oh->_lock, flags); |
2092e5cc PW |
2587 | |
2588 | return ret; | |
2589 | } | |
c80705aa KH |
2590 | |
2591 | /** | |
2592 | * omap_hwmod_get_context_loss_count - get lost context count | |
2593 | * @oh: struct omap_hwmod * | |
2594 | * | |
2595 | * Query the powerdomain of of @oh to get the context loss | |
2596 | * count for this device. | |
2597 | * | |
2598 | * Returns the context loss count of the powerdomain assocated with @oh | |
2599 | * upon success, or zero if no powerdomain exists for @oh. | |
2600 | */ | |
2601 | u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh) | |
2602 | { | |
2603 | struct powerdomain *pwrdm; | |
2604 | int ret = 0; | |
2605 | ||
2606 | pwrdm = omap_hwmod_get_pwrdm(oh); | |
2607 | if (pwrdm) | |
2608 | ret = pwrdm_get_context_loss_count(pwrdm); | |
2609 | ||
2610 | return ret; | |
2611 | } | |
43b01643 PW |
2612 | |
2613 | /** | |
2614 | * omap_hwmod_no_setup_reset - prevent a hwmod from being reset upon setup | |
2615 | * @oh: struct omap_hwmod * | |
2616 | * | |
2617 | * Prevent the hwmod @oh from being reset during the setup process. | |
2618 | * Intended for use by board-*.c files on boards with devices that | |
2619 | * cannot tolerate being reset. Must be called before the hwmod has | |
2620 | * been set up. Returns 0 upon success or negative error code upon | |
2621 | * failure. | |
2622 | */ | |
2623 | int omap_hwmod_no_setup_reset(struct omap_hwmod *oh) | |
2624 | { | |
2625 | if (!oh) | |
2626 | return -EINVAL; | |
2627 | ||
2628 | if (oh->_state != _HWMOD_STATE_REGISTERED) { | |
2629 | pr_err("omap_hwmod: %s: cannot prevent setup reset; in wrong state\n", | |
2630 | oh->name); | |
2631 | return -EINVAL; | |
2632 | } | |
2633 | ||
2634 | oh->flags |= HWMOD_INIT_NO_RESET; | |
2635 | ||
2636 | return 0; | |
2637 | } |