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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / arch / arm / mach-omap2 / cm3xxx.c
blobf6f028867bfe175f70cb6864e62bbf471125ec4f
1 /*
2 * OMAP3xxx CM module functions
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Copyright (C) 2008-2010, 2012 Texas Instruments, Inc.
6 * Paul Walmsley
7 * Rajendra Nayak <rnayak@ti.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/delay.h>
17 #include <linux/errno.h>
18 #include <linux/err.h>
19 #include <linux/io.h>
20
21 #include "soc.h"
22 #include "iomap.h"
23 #include "common.h"
24 #include "prm2xxx_3xxx.h"
25 #include "cm.h"
26 #include "cm3xxx.h"
27 #include "cm-regbits-34xx.h"
28 #include "clockdomain.h"
29
30 static const u8 omap3xxx_cm_idlest_offs[] = {
31 CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3
32 };
33
34 /*
35 *
36 */
37
38 static void _write_clktrctrl(u8 c, s16 module, u32 mask)
39 {
40 u32 v;
41
42 v = omap2_cm_read_mod_reg(module, OMAP2_CM_CLKSTCTRL);
43 v &= ~mask;
44 v |= c << __ffs(mask);
45 omap2_cm_write_mod_reg(v, module, OMAP2_CM_CLKSTCTRL);
46 }
47
48 bool omap3xxx_cm_is_clkdm_in_hwsup(s16 module, u32 mask)
49 {
50 u32 v;
51
52 v = omap2_cm_read_mod_reg(module, OMAP2_CM_CLKSTCTRL);
53 v &= mask;
54 v >>= __ffs(mask);
55
56 return (v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ? 1 : 0;
57 }
58
59 void omap3xxx_cm_clkdm_enable_hwsup(s16 module, u32 mask)
60 {
61 _write_clktrctrl(OMAP34XX_CLKSTCTRL_ENABLE_AUTO, module, mask);
62 }
63
64 void omap3xxx_cm_clkdm_disable_hwsup(s16 module, u32 mask)
65 {
66 _write_clktrctrl(OMAP34XX_CLKSTCTRL_DISABLE_AUTO, module, mask);
67 }
68
69 void omap3xxx_cm_clkdm_force_sleep(s16 module, u32 mask)
70 {
71 _write_clktrctrl(OMAP34XX_CLKSTCTRL_FORCE_SLEEP, module, mask);
72 }
73
74 void omap3xxx_cm_clkdm_force_wakeup(s16 module, u32 mask)
75 {
76 _write_clktrctrl(OMAP34XX_CLKSTCTRL_FORCE_WAKEUP, module, mask);
77 }
78
79 /*
80 *
81 */
82
83 /**
84 * omap3xxx_cm_wait_module_ready - wait for a module to leave idle or standby
85 * @prcm_mod: PRCM module offset
86 * @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3)
87 * @idlest_shift: shift of the bit in the CM_IDLEST* register to check
88 *
89 * Wait for the PRCM to indicate that the module identified by
90 * (@prcm_mod, @idlest_id, @idlest_shift) is clocked. Return 0 upon
91 * success or -EBUSY if the module doesn't enable in time.
92 */
93 int omap3xxx_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift)
94 {
95 int ena = 0, i = 0;
96 u8 cm_idlest_reg;
97 u32 mask;
98
99 if (!idlest_id || (idlest_id > ARRAY_SIZE(omap3xxx_cm_idlest_offs)))
100 return -EINVAL;
101
102 cm_idlest_reg = omap3xxx_cm_idlest_offs[idlest_id - 1];
103
104 mask = 1 << idlest_shift;
105 ena = 0;
106
107 omap_test_timeout(((omap2_cm_read_mod_reg(prcm_mod, cm_idlest_reg) &
108 mask) == ena), MAX_MODULE_READY_TIME, i);
109
110 return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
111 }
112
113 /**
114 * omap3xxx_cm_split_idlest_reg - split CM_IDLEST reg addr into its components
115 * @idlest_reg: CM_IDLEST* virtual address
116 * @prcm_inst: pointer to an s16 to return the PRCM instance offset
117 * @idlest_reg_id: pointer to a u8 to return the CM_IDLESTx register ID
118 *
119 * XXX This function is only needed until absolute register addresses are
120 * removed from the OMAP struct clk records.
121 */
122 int omap3xxx_cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst,
123 u8 *idlest_reg_id)
124 {
125 unsigned long offs;
126 u8 idlest_offs;
127 int i;
128
129 if (idlest_reg < (cm_base + OMAP3430_IVA2_MOD) ||
130 idlest_reg > (cm_base + 0x1ffff))
131 return -EINVAL;
132
133 idlest_offs = (unsigned long)idlest_reg & 0xff;
134 for (i = 0; i < ARRAY_SIZE(omap3xxx_cm_idlest_offs); i++) {
135 if (idlest_offs == omap3xxx_cm_idlest_offs[i]) {
136 *idlest_reg_id = i + 1;
137 break;
138 }
139 }
140
141 if (i == ARRAY_SIZE(omap3xxx_cm_idlest_offs))
142 return -EINVAL;
143
144 offs = idlest_reg - cm_base;
145 offs &= 0xff00;
146 *prcm_inst = offs;
147
148 return 0;
149 }
150
151 /* Clockdomain low-level operations */
152
153 static int omap3xxx_clkdm_add_sleepdep(struct clockdomain *clkdm1,
154 struct clockdomain *clkdm2)
155 {
156 omap2_cm_set_mod_reg_bits((1 << clkdm2->dep_bit),
157 clkdm1->pwrdm.ptr->prcm_offs,
158 OMAP3430_CM_SLEEPDEP);
159 return 0;
160 }
161
162 static int omap3xxx_clkdm_del_sleepdep(struct clockdomain *clkdm1,
163 struct clockdomain *clkdm2)
164 {
165 omap2_cm_clear_mod_reg_bits((1 << clkdm2->dep_bit),
166 clkdm1->pwrdm.ptr->prcm_offs,
167 OMAP3430_CM_SLEEPDEP);
168 return 0;
169 }
170
171 static int omap3xxx_clkdm_read_sleepdep(struct clockdomain *clkdm1,
172 struct clockdomain *clkdm2)
173 {
174 return omap2_cm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs,
175 OMAP3430_CM_SLEEPDEP,
176 (1 << clkdm2->dep_bit));
177 }
178
179 static int omap3xxx_clkdm_clear_all_sleepdeps(struct clockdomain *clkdm)
180 {
181 struct clkdm_dep *cd;
182 u32 mask = 0;
183
184 for (cd = clkdm->sleepdep_srcs; cd && cd->clkdm_name; cd++) {
185 if (!cd->clkdm)
186 continue; /* only happens if data is erroneous */
187
188 mask |= 1 << cd->clkdm->dep_bit;
189 cd->sleepdep_usecount = 0;
190 }
191 omap2_cm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs,
192 OMAP3430_CM_SLEEPDEP);
193 return 0;
194 }
195
196 static int omap3xxx_clkdm_sleep(struct clockdomain *clkdm)
197 {
198 omap3xxx_cm_clkdm_force_sleep(clkdm->pwrdm.ptr->prcm_offs,
199 clkdm->clktrctrl_mask);
200 return 0;
201 }
202
203 static int omap3xxx_clkdm_wakeup(struct clockdomain *clkdm)
204 {
205 omap3xxx_cm_clkdm_force_wakeup(clkdm->pwrdm.ptr->prcm_offs,
206 clkdm->clktrctrl_mask);
207 return 0;
208 }
209
210 static void omap3xxx_clkdm_allow_idle(struct clockdomain *clkdm)
211 {
212 if (clkdm->usecount > 0)
213 clkdm_add_autodeps(clkdm);
214
215 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
216 clkdm->clktrctrl_mask);
217 }
218
219 static void omap3xxx_clkdm_deny_idle(struct clockdomain *clkdm)
220 {
221 omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
222 clkdm->clktrctrl_mask);
223
224 if (clkdm->usecount > 0)
225 clkdm_del_autodeps(clkdm);
226 }
227
228 static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
229 {
230 bool hwsup = false;
231
232 if (!clkdm->clktrctrl_mask)
233 return 0;
234
235 /*
236 * The CLKDM_MISSING_IDLE_REPORTING flag documentation has
237 * more details on the unpleasant problem this is working
238 * around
239 */
240 if ((clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) &&
241 (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)) {
242 omap3xxx_clkdm_wakeup(clkdm);
243 return 0;
244 }
245
246 hwsup = omap3xxx_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
247 clkdm->clktrctrl_mask);
248
249 if (hwsup) {
250 /* Disable HW transitions when we are changing deps */
251 omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
252 clkdm->clktrctrl_mask);
253 clkdm_add_autodeps(clkdm);
254 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
255 clkdm->clktrctrl_mask);
256 } else {
257 if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
258 omap3xxx_clkdm_wakeup(clkdm);
259 }
260
261 return 0;
262 }
263
264 static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
265 {
266 bool hwsup = false;
267
268 if (!clkdm->clktrctrl_mask)
269 return 0;
270
271 /*
272 * The CLKDM_MISSING_IDLE_REPORTING flag documentation has
273 * more details on the unpleasant problem this is working
274 * around
275 */
276 if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING &&
277 !(clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) {
278 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
279 clkdm->clktrctrl_mask);
280 return 0;
281 }
282
283 hwsup = omap3xxx_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
284 clkdm->clktrctrl_mask);
285
286 if (hwsup) {
287 /* Disable HW transitions when we are changing deps */
288 omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
289 clkdm->clktrctrl_mask);
290 clkdm_del_autodeps(clkdm);
291 omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
292 clkdm->clktrctrl_mask);
293 } else {
294 if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)
295 omap3xxx_clkdm_sleep(clkdm);
296 }
297
298 return 0;
299 }
300
301 struct clkdm_ops omap3_clkdm_operations = {
302 .clkdm_add_wkdep = omap2_clkdm_add_wkdep,
303 .clkdm_del_wkdep = omap2_clkdm_del_wkdep,
304 .clkdm_read_wkdep = omap2_clkdm_read_wkdep,
305 .clkdm_clear_all_wkdeps = omap2_clkdm_clear_all_wkdeps,
306 .clkdm_add_sleepdep = omap3xxx_clkdm_add_sleepdep,
307 .clkdm_del_sleepdep = omap3xxx_clkdm_del_sleepdep,
308 .clkdm_read_sleepdep = omap3xxx_clkdm_read_sleepdep,
309 .clkdm_clear_all_sleepdeps = omap3xxx_clkdm_clear_all_sleepdeps,
310 .clkdm_sleep = omap3xxx_clkdm_sleep,
311 .clkdm_wakeup = omap3xxx_clkdm_wakeup,
312 .clkdm_allow_idle = omap3xxx_clkdm_allow_idle,
313 .clkdm_deny_idle = omap3xxx_clkdm_deny_idle,
314 .clkdm_clk_enable = omap3xxx_clkdm_clk_enable,
315 .clkdm_clk_disable = omap3xxx_clkdm_clk_disable,
316 };
317
318 /*
319 * Context save/restore code - OMAP3 only
320 */
321 struct omap3_cm_regs {
322 u32 iva2_cm_clksel1;
323 u32 iva2_cm_clksel2;
324 u32 cm_sysconfig;
325 u32 sgx_cm_clksel;
326 u32 dss_cm_clksel;
327 u32 cam_cm_clksel;
328 u32 per_cm_clksel;
329 u32 emu_cm_clksel;
330 u32 emu_cm_clkstctrl;
331 u32 pll_cm_autoidle;
332 u32 pll_cm_autoidle2;
333 u32 pll_cm_clksel4;
334 u32 pll_cm_clksel5;
335 u32 pll_cm_clken2;
336 u32 cm_polctrl;
337 u32 iva2_cm_fclken;
338 u32 iva2_cm_clken_pll;
339 u32 core_cm_fclken1;
340 u32 core_cm_fclken3;
341 u32 sgx_cm_fclken;
342 u32 wkup_cm_fclken;
343 u32 dss_cm_fclken;
344 u32 cam_cm_fclken;
345 u32 per_cm_fclken;
346 u32 usbhost_cm_fclken;
347 u32 core_cm_iclken1;
348 u32 core_cm_iclken2;
349 u32 core_cm_iclken3;
350 u32 sgx_cm_iclken;
351 u32 wkup_cm_iclken;
352 u32 dss_cm_iclken;
353 u32 cam_cm_iclken;
354 u32 per_cm_iclken;
355 u32 usbhost_cm_iclken;
356 u32 iva2_cm_autoidle2;
357 u32 mpu_cm_autoidle2;
358 u32 iva2_cm_clkstctrl;
359 u32 mpu_cm_clkstctrl;
360 u32 core_cm_clkstctrl;
361 u32 sgx_cm_clkstctrl;
362 u32 dss_cm_clkstctrl;
363 u32 cam_cm_clkstctrl;
364 u32 per_cm_clkstctrl;
365 u32 neon_cm_clkstctrl;
366 u32 usbhost_cm_clkstctrl;
367 u32 core_cm_autoidle1;
368 u32 core_cm_autoidle2;
369 u32 core_cm_autoidle3;
370 u32 wkup_cm_autoidle;
371 u32 dss_cm_autoidle;
372 u32 cam_cm_autoidle;
373 u32 per_cm_autoidle;
374 u32 usbhost_cm_autoidle;
375 u32 sgx_cm_sleepdep;
376 u32 dss_cm_sleepdep;
377 u32 cam_cm_sleepdep;
378 u32 per_cm_sleepdep;
379 u32 usbhost_cm_sleepdep;
380 u32 cm_clkout_ctrl;
381 };
382
383 static struct omap3_cm_regs cm_context;
384
385 void omap3_cm_save_context(void)
386 {
387 cm_context.iva2_cm_clksel1 =
388 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_CLKSEL1);
389 cm_context.iva2_cm_clksel2 =
390 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_CLKSEL2);
391 cm_context.cm_sysconfig = __raw_readl(OMAP3430_CM_SYSCONFIG);
392 cm_context.sgx_cm_clksel =
393 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_CLKSEL);
394 cm_context.dss_cm_clksel =
395 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_CLKSEL);
396 cm_context.cam_cm_clksel =
397 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_CLKSEL);
398 cm_context.per_cm_clksel =
399 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_CLKSEL);
400 cm_context.emu_cm_clksel =
401 omap2_cm_read_mod_reg(OMAP3430_EMU_MOD, CM_CLKSEL1);
402 cm_context.emu_cm_clkstctrl =
403 omap2_cm_read_mod_reg(OMAP3430_EMU_MOD, OMAP2_CM_CLKSTCTRL);
404 /*
405 * As per erratum i671, ROM code does not respect the PER DPLL
406 * programming scheme if CM_AUTOIDLE_PLL.AUTO_PERIPH_DPLL == 1.
407 * In this case, even though this register has been saved in
408 * scratchpad contents, we need to restore AUTO_PERIPH_DPLL
409 * by ourselves. So, we need to save it anyway.
410 */
411 cm_context.pll_cm_autoidle =
412 omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE);
413 cm_context.pll_cm_autoidle2 =
414 omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE2);
415 cm_context.pll_cm_clksel4 =
416 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKSEL4);
417 cm_context.pll_cm_clksel5 =
418 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKSEL5);
419 cm_context.pll_cm_clken2 =
420 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKEN2);
421 cm_context.cm_polctrl = __raw_readl(OMAP3430_CM_POLCTRL);
422 cm_context.iva2_cm_fclken =
423 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_FCLKEN);
424 cm_context.iva2_cm_clken_pll =
425 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKEN_PLL);
426 cm_context.core_cm_fclken1 =
427 omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
428 cm_context.core_cm_fclken3 =
429 omap2_cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
430 cm_context.sgx_cm_fclken =
431 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_FCLKEN);
432 cm_context.wkup_cm_fclken =
433 omap2_cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
434 cm_context.dss_cm_fclken =
435 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_FCLKEN);
436 cm_context.cam_cm_fclken =
437 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_FCLKEN);
438 cm_context.per_cm_fclken =
439 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
440 cm_context.usbhost_cm_fclken =
441 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_FCLKEN);
442 cm_context.core_cm_iclken1 =
443 omap2_cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
444 cm_context.core_cm_iclken2 =
445 omap2_cm_read_mod_reg(CORE_MOD, CM_ICLKEN2);
446 cm_context.core_cm_iclken3 =
447 omap2_cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
448 cm_context.sgx_cm_iclken =
449 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_ICLKEN);
450 cm_context.wkup_cm_iclken =
451 omap2_cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
452 cm_context.dss_cm_iclken =
453 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_ICLKEN);
454 cm_context.cam_cm_iclken =
455 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_ICLKEN);
456 cm_context.per_cm_iclken =
457 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
458 cm_context.usbhost_cm_iclken =
459 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_ICLKEN);
460 cm_context.iva2_cm_autoidle2 =
461 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
462 cm_context.mpu_cm_autoidle2 =
463 omap2_cm_read_mod_reg(MPU_MOD, CM_AUTOIDLE2);
464 cm_context.iva2_cm_clkstctrl =
465 omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP2_CM_CLKSTCTRL);
466 cm_context.mpu_cm_clkstctrl =
467 omap2_cm_read_mod_reg(MPU_MOD, OMAP2_CM_CLKSTCTRL);
468 cm_context.core_cm_clkstctrl =
469 omap2_cm_read_mod_reg(CORE_MOD, OMAP2_CM_CLKSTCTRL);
470 cm_context.sgx_cm_clkstctrl =
471 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD, OMAP2_CM_CLKSTCTRL);
472 cm_context.dss_cm_clkstctrl =
473 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, OMAP2_CM_CLKSTCTRL);
474 cm_context.cam_cm_clkstctrl =
475 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, OMAP2_CM_CLKSTCTRL);
476 cm_context.per_cm_clkstctrl =
477 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, OMAP2_CM_CLKSTCTRL);
478 cm_context.neon_cm_clkstctrl =
479 omap2_cm_read_mod_reg(OMAP3430_NEON_MOD, OMAP2_CM_CLKSTCTRL);
480 cm_context.usbhost_cm_clkstctrl =
481 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
482 OMAP2_CM_CLKSTCTRL);
483 cm_context.core_cm_autoidle1 =
484 omap2_cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE1);
485 cm_context.core_cm_autoidle2 =
486 omap2_cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE2);
487 cm_context.core_cm_autoidle3 =
488 omap2_cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE3);
489 cm_context.wkup_cm_autoidle =
490 omap2_cm_read_mod_reg(WKUP_MOD, CM_AUTOIDLE);
491 cm_context.dss_cm_autoidle =
492 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, CM_AUTOIDLE);
493 cm_context.cam_cm_autoidle =
494 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, CM_AUTOIDLE);
495 cm_context.per_cm_autoidle =
496 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
497 cm_context.usbhost_cm_autoidle =
498 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
499 cm_context.sgx_cm_sleepdep =
500 omap2_cm_read_mod_reg(OMAP3430ES2_SGX_MOD,
501 OMAP3430_CM_SLEEPDEP);
502 cm_context.dss_cm_sleepdep =
503 omap2_cm_read_mod_reg(OMAP3430_DSS_MOD, OMAP3430_CM_SLEEPDEP);
504 cm_context.cam_cm_sleepdep =
505 omap2_cm_read_mod_reg(OMAP3430_CAM_MOD, OMAP3430_CM_SLEEPDEP);
506 cm_context.per_cm_sleepdep =
507 omap2_cm_read_mod_reg(OMAP3430_PER_MOD, OMAP3430_CM_SLEEPDEP);
508 cm_context.usbhost_cm_sleepdep =
509 omap2_cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
510 OMAP3430_CM_SLEEPDEP);
511 cm_context.cm_clkout_ctrl =
512 omap2_cm_read_mod_reg(OMAP3430_CCR_MOD,
513 OMAP3_CM_CLKOUT_CTRL_OFFSET);
514 }
515
516 void omap3_cm_restore_context(void)
517 {
518 omap2_cm_write_mod_reg(cm_context.iva2_cm_clksel1, OMAP3430_IVA2_MOD,
519 CM_CLKSEL1);
520 omap2_cm_write_mod_reg(cm_context.iva2_cm_clksel2, OMAP3430_IVA2_MOD,
521 CM_CLKSEL2);
522 __raw_writel(cm_context.cm_sysconfig, OMAP3430_CM_SYSCONFIG);
523 omap2_cm_write_mod_reg(cm_context.sgx_cm_clksel, OMAP3430ES2_SGX_MOD,
524 CM_CLKSEL);
525 omap2_cm_write_mod_reg(cm_context.dss_cm_clksel, OMAP3430_DSS_MOD,
526 CM_CLKSEL);
527 omap2_cm_write_mod_reg(cm_context.cam_cm_clksel, OMAP3430_CAM_MOD,
528 CM_CLKSEL);
529 omap2_cm_write_mod_reg(cm_context.per_cm_clksel, OMAP3430_PER_MOD,
530 CM_CLKSEL);
531 omap2_cm_write_mod_reg(cm_context.emu_cm_clksel, OMAP3430_EMU_MOD,
532 CM_CLKSEL1);
533 omap2_cm_write_mod_reg(cm_context.emu_cm_clkstctrl, OMAP3430_EMU_MOD,
534 OMAP2_CM_CLKSTCTRL);
535 /*
536 * As per erratum i671, ROM code does not respect the PER DPLL
537 * programming scheme if CM_AUTOIDLE_PLL.AUTO_PERIPH_DPLL == 1.
538 * In this case, we need to restore AUTO_PERIPH_DPLL by ourselves.
539 */
540 omap2_cm_write_mod_reg(cm_context.pll_cm_autoidle, PLL_MOD,
541 CM_AUTOIDLE);
542 omap2_cm_write_mod_reg(cm_context.pll_cm_autoidle2, PLL_MOD,
543 CM_AUTOIDLE2);
544 omap2_cm_write_mod_reg(cm_context.pll_cm_clksel4, PLL_MOD,
545 OMAP3430ES2_CM_CLKSEL4);
546 omap2_cm_write_mod_reg(cm_context.pll_cm_clksel5, PLL_MOD,
547 OMAP3430ES2_CM_CLKSEL5);
548 omap2_cm_write_mod_reg(cm_context.pll_cm_clken2, PLL_MOD,
549 OMAP3430ES2_CM_CLKEN2);
550 __raw_writel(cm_context.cm_polctrl, OMAP3430_CM_POLCTRL);
551 omap2_cm_write_mod_reg(cm_context.iva2_cm_fclken, OMAP3430_IVA2_MOD,
552 CM_FCLKEN);
553 omap2_cm_write_mod_reg(cm_context.iva2_cm_clken_pll, OMAP3430_IVA2_MOD,
554 OMAP3430_CM_CLKEN_PLL);
555 omap2_cm_write_mod_reg(cm_context.core_cm_fclken1, CORE_MOD,
556 CM_FCLKEN1);
557 omap2_cm_write_mod_reg(cm_context.core_cm_fclken3, CORE_MOD,
558 OMAP3430ES2_CM_FCLKEN3);
559 omap2_cm_write_mod_reg(cm_context.sgx_cm_fclken, OMAP3430ES2_SGX_MOD,
560 CM_FCLKEN);
561 omap2_cm_write_mod_reg(cm_context.wkup_cm_fclken, WKUP_MOD, CM_FCLKEN);
562 omap2_cm_write_mod_reg(cm_context.dss_cm_fclken, OMAP3430_DSS_MOD,
563 CM_FCLKEN);
564 omap2_cm_write_mod_reg(cm_context.cam_cm_fclken, OMAP3430_CAM_MOD,
565 CM_FCLKEN);
566 omap2_cm_write_mod_reg(cm_context.per_cm_fclken, OMAP3430_PER_MOD,
567 CM_FCLKEN);
568 omap2_cm_write_mod_reg(cm_context.usbhost_cm_fclken,
569 OMAP3430ES2_USBHOST_MOD, CM_FCLKEN);
570 omap2_cm_write_mod_reg(cm_context.core_cm_iclken1, CORE_MOD,
571 CM_ICLKEN1);
572 omap2_cm_write_mod_reg(cm_context.core_cm_iclken2, CORE_MOD,
573 CM_ICLKEN2);
574 omap2_cm_write_mod_reg(cm_context.core_cm_iclken3, CORE_MOD,
575 CM_ICLKEN3);
576 omap2_cm_write_mod_reg(cm_context.sgx_cm_iclken, OMAP3430ES2_SGX_MOD,
577 CM_ICLKEN);
578 omap2_cm_write_mod_reg(cm_context.wkup_cm_iclken, WKUP_MOD, CM_ICLKEN);
579 omap2_cm_write_mod_reg(cm_context.dss_cm_iclken, OMAP3430_DSS_MOD,
580 CM_ICLKEN);
581 omap2_cm_write_mod_reg(cm_context.cam_cm_iclken, OMAP3430_CAM_MOD,
582 CM_ICLKEN);
583 omap2_cm_write_mod_reg(cm_context.per_cm_iclken, OMAP3430_PER_MOD,
584 CM_ICLKEN);
585 omap2_cm_write_mod_reg(cm_context.usbhost_cm_iclken,
586 OMAP3430ES2_USBHOST_MOD, CM_ICLKEN);
587 omap2_cm_write_mod_reg(cm_context.iva2_cm_autoidle2, OMAP3430_IVA2_MOD,
588 CM_AUTOIDLE2);
589 omap2_cm_write_mod_reg(cm_context.mpu_cm_autoidle2, MPU_MOD,
590 CM_AUTOIDLE2);
591 omap2_cm_write_mod_reg(cm_context.iva2_cm_clkstctrl, OMAP3430_IVA2_MOD,
592 OMAP2_CM_CLKSTCTRL);
593 omap2_cm_write_mod_reg(cm_context.mpu_cm_clkstctrl, MPU_MOD,
594 OMAP2_CM_CLKSTCTRL);
595 omap2_cm_write_mod_reg(cm_context.core_cm_clkstctrl, CORE_MOD,
596 OMAP2_CM_CLKSTCTRL);
597 omap2_cm_write_mod_reg(cm_context.sgx_cm_clkstctrl, OMAP3430ES2_SGX_MOD,
598 OMAP2_CM_CLKSTCTRL);
599 omap2_cm_write_mod_reg(cm_context.dss_cm_clkstctrl, OMAP3430_DSS_MOD,
600 OMAP2_CM_CLKSTCTRL);
601 omap2_cm_write_mod_reg(cm_context.cam_cm_clkstctrl, OMAP3430_CAM_MOD,
602 OMAP2_CM_CLKSTCTRL);
603 omap2_cm_write_mod_reg(cm_context.per_cm_clkstctrl, OMAP3430_PER_MOD,
604 OMAP2_CM_CLKSTCTRL);
605 omap2_cm_write_mod_reg(cm_context.neon_cm_clkstctrl, OMAP3430_NEON_MOD,
606 OMAP2_CM_CLKSTCTRL);
607 omap2_cm_write_mod_reg(cm_context.usbhost_cm_clkstctrl,
608 OMAP3430ES2_USBHOST_MOD, OMAP2_CM_CLKSTCTRL);
609 omap2_cm_write_mod_reg(cm_context.core_cm_autoidle1, CORE_MOD,
610 CM_AUTOIDLE1);
611 omap2_cm_write_mod_reg(cm_context.core_cm_autoidle2, CORE_MOD,
612 CM_AUTOIDLE2);
613 omap2_cm_write_mod_reg(cm_context.core_cm_autoidle3, CORE_MOD,
614 CM_AUTOIDLE3);
615 omap2_cm_write_mod_reg(cm_context.wkup_cm_autoidle, WKUP_MOD,
616 CM_AUTOIDLE);
617 omap2_cm_write_mod_reg(cm_context.dss_cm_autoidle, OMAP3430_DSS_MOD,
618 CM_AUTOIDLE);
619 omap2_cm_write_mod_reg(cm_context.cam_cm_autoidle, OMAP3430_CAM_MOD,
620 CM_AUTOIDLE);
621 omap2_cm_write_mod_reg(cm_context.per_cm_autoidle, OMAP3430_PER_MOD,
622 CM_AUTOIDLE);
623 omap2_cm_write_mod_reg(cm_context.usbhost_cm_autoidle,
624 OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
625 omap2_cm_write_mod_reg(cm_context.sgx_cm_sleepdep, OMAP3430ES2_SGX_MOD,
626 OMAP3430_CM_SLEEPDEP);
627 omap2_cm_write_mod_reg(cm_context.dss_cm_sleepdep, OMAP3430_DSS_MOD,
628 OMAP3430_CM_SLEEPDEP);
629 omap2_cm_write_mod_reg(cm_context.cam_cm_sleepdep, OMAP3430_CAM_MOD,
630 OMAP3430_CM_SLEEPDEP);
631 omap2_cm_write_mod_reg(cm_context.per_cm_sleepdep, OMAP3430_PER_MOD,
632 OMAP3430_CM_SLEEPDEP);
633 omap2_cm_write_mod_reg(cm_context.usbhost_cm_sleepdep,
634 OMAP3430ES2_USBHOST_MOD, OMAP3430_CM_SLEEPDEP);
635 omap2_cm_write_mod_reg(cm_context.cm_clkout_ctrl, OMAP3430_CCR_MOD,
636 OMAP3_CM_CLKOUT_CTRL_OFFSET);
637 }
638
639 void omap3_cm_save_scratchpad_contents(u32 *ptr)
640 {
641 *ptr++ = omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
642 *ptr++ = omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
643 *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
644
645 /*
646 * As per erratum i671, ROM code does not respect the PER DPLL
647 * programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1.
648 * Then, in anycase, clear these bits to avoid extra latencies.
649 */
650 *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE) &
651 ~OMAP3430_AUTO_PERIPH_DPLL_MASK;
652 *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL);
653 *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL);
654 *ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3);
655 *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL);
656 *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL);
657 *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL);
658 *ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL);
659 }
660
661 /*
662 *
663 */
664
665 static struct cm_ll_data omap3xxx_cm_ll_data = {
666 .split_idlest_reg = &omap3xxx_cm_split_idlest_reg,
667 .wait_module_ready = &omap3xxx_cm_wait_module_ready,
668 };
669
670 int __init omap3xxx_cm_init(void)
671 {
672 if (!cpu_is_omap34xx())
673 return 0;
674
675 return cm_register(&omap3xxx_cm_ll_data);
676 }
677
678 static void __exit omap3xxx_cm_exit(void)
679 {
680 if (!cpu_is_omap34xx())
681 return;
682
683 /* Should never happen */
684 WARN(cm_unregister(&omap3xxx_cm_ll_data),
685 "%s: cm_ll_data function pointer mismatch\n", __func__);
686 }
687 __exitcall(omap3xxx_cm_exit);
Linux with added FPC-III support