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