aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-mx3/clock.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-mx3/clock.c')
-rw-r--r--arch/arm/mach-mx3/clock.c1147
1 files changed, 1147 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/clock.c b/arch/arm/mach-mx3/clock.c
new file mode 100644
index 000000000000..2f3635943e70
--- /dev/null
+++ b/arch/arm/mach-mx3/clock.c
@@ -0,0 +1,1147 @@
1/*
2 * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
17 * MA 02110-1301, USA.
18 */
19
20#include <linux/module.h>
21#include <linux/spinlock.h>
22#include <linux/delay.h>
23#include <linux/clk.h>
24#include <linux/err.h>
25#include <linux/io.h>
26#include <asm/arch/clock.h>
27#include <asm/div64.h>
28
29#include "crm_regs.h"
30
31#define PRE_DIV_MIN_FREQ 10000000 /* Minimum Frequency after Predivider */
32
33static void __calc_pre_post_dividers(u32 div, u32 *pre, u32 *post)
34{
35 u32 min_pre, temp_pre, old_err, err;
36
37 if (div >= 512) {
38 *pre = 8;
39 *post = 64;
40 } else if (div >= 64) {
41 min_pre = (div - 1) / 64 + 1;
42 old_err = 8;
43 for (temp_pre = 8; temp_pre >= min_pre; temp_pre--) {
44 err = div % temp_pre;
45 if (err == 0) {
46 *pre = temp_pre;
47 break;
48 }
49 err = temp_pre - err;
50 if (err < old_err) {
51 old_err = err;
52 *pre = temp_pre;
53 }
54 }
55 *post = (div + *pre - 1) / *pre;
56 } else if (div <= 8) {
57 *pre = div;
58 *post = 1;
59 } else {
60 *pre = 1;
61 *post = div;
62 }
63}
64
65static struct clk mcu_pll_clk;
66static struct clk mcu_main_clk;
67static struct clk usb_pll_clk;
68static struct clk serial_pll_clk;
69static struct clk ipg_clk;
70static struct clk ckih_clk;
71static struct clk ahb_clk;
72
73static int _clk_enable(struct clk *clk)
74{
75 u32 reg;
76
77 reg = __raw_readl(clk->enable_reg);
78 reg |= 3 << clk->enable_shift;
79 __raw_writel(reg, clk->enable_reg);
80
81 return 0;
82}
83
84static void _clk_disable(struct clk *clk)
85{
86 u32 reg;
87
88 reg = __raw_readl(clk->enable_reg);
89 reg &= ~(3 << clk->enable_shift);
90 __raw_writel(reg, clk->enable_reg);
91}
92
93static void _clk_emi_disable(struct clk *clk)
94{
95 u32 reg;
96
97 reg = __raw_readl(clk->enable_reg);
98 reg &= ~(3 << clk->enable_shift);
99 reg |= (1 << clk->enable_shift);
100 __raw_writel(reg, clk->enable_reg);
101}
102
103static int _clk_pll_set_rate(struct clk *clk, unsigned long rate)
104{
105 u32 reg;
106 signed long pd = 1; /* Pre-divider */
107 signed long mfi; /* Multiplication Factor (Integer part) */
108 signed long mfn; /* Multiplication Factor (Integer part) */
109 signed long mfd; /* Multiplication Factor (Denominator Part) */
110 signed long tmp;
111 u32 ref_freq = clk_get_rate(clk->parent);
112
113 while (((ref_freq / pd) * 10) > rate)
114 pd++;
115
116 if ((ref_freq / pd) < PRE_DIV_MIN_FREQ)
117 return -EINVAL;
118
119 /* the ref_freq/2 in the following is to round up */
120 mfi = (((rate / 2) * pd) + (ref_freq / 2)) / ref_freq;
121 if (mfi < 5 || mfi > 15)
122 return -EINVAL;
123
124 /* pick a mfd value that will work
125 * then solve for mfn */
126 mfd = ref_freq / 50000;
127
128 /*
129 * pll_freq * pd * mfd
130 * mfn = -------------------- - (mfi * mfd)
131 * 2 * ref_freq
132 */
133 /* the tmp/2 is for rounding */
134 tmp = ref_freq / 10000;
135 mfn =
136 ((((((rate / 2) + (tmp / 2)) / tmp) * pd) * mfd) / 10000) -
137 (mfi * mfd);
138
139 mfn = mfn & 0x3ff;
140 pd--;
141 mfd--;
142
143 /* Change the Pll value */
144 reg = (mfi << MXC_CCM_PCTL_MFI_OFFSET) |
145 (mfn << MXC_CCM_PCTL_MFN_OFFSET) |
146 (mfd << MXC_CCM_PCTL_MFD_OFFSET) | (pd << MXC_CCM_PCTL_PD_OFFSET);
147
148 if (clk == &mcu_pll_clk)
149 __raw_writel(reg, MXC_CCM_MPCTL);
150 else if (clk == &usb_pll_clk)
151 __raw_writel(reg, MXC_CCM_UPCTL);
152 else if (clk == &serial_pll_clk)
153 __raw_writel(reg, MXC_CCM_SRPCTL);
154
155 return 0;
156}
157
158static unsigned long _clk_pll_get_rate(struct clk *clk)
159{
160 long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
161 unsigned long reg, ccmr;
162 s64 temp;
163 unsigned int prcs;
164
165 ccmr = __raw_readl(MXC_CCM_CCMR);
166 prcs = (ccmr & MXC_CCM_CCMR_PRCS_MASK) >> MXC_CCM_CCMR_PRCS_OFFSET;
167 if (prcs == 0x1)
168 ref_clk = CKIL_CLK_FREQ * 1024;
169 else
170 ref_clk = clk_get_rate(&ckih_clk);
171
172 if (clk == &mcu_pll_clk) {
173 if ((ccmr & MXC_CCM_CCMR_MPE) == 0)
174 return ref_clk;
175 if ((ccmr & MXC_CCM_CCMR_MDS) != 0)
176 return ref_clk;
177 reg = __raw_readl(MXC_CCM_MPCTL);
178 } else if (clk == &usb_pll_clk)
179 reg = __raw_readl(MXC_CCM_UPCTL);
180 else if (clk == &serial_pll_clk)
181 reg = __raw_readl(MXC_CCM_SRPCTL);
182 else {
183 BUG();
184 return 0;
185 }
186
187 pdf = (reg & MXC_CCM_PCTL_PD_MASK) >> MXC_CCM_PCTL_PD_OFFSET;
188 mfd = (reg & MXC_CCM_PCTL_MFD_MASK) >> MXC_CCM_PCTL_MFD_OFFSET;
189 mfi = (reg & MXC_CCM_PCTL_MFI_MASK) >> MXC_CCM_PCTL_MFI_OFFSET;
190 mfi = (mfi <= 5) ? 5 : mfi;
191 mfn = mfn_abs = reg & MXC_CCM_PCTL_MFN_MASK;
192
193 if (mfn >= 0x200) {
194 mfn |= 0xFFFFFE00;
195 mfn_abs = -mfn;
196 }
197
198 ref_clk *= 2;
199 ref_clk /= pdf + 1;
200
201 temp = (u64) ref_clk * mfn_abs;
202 do_div(temp, mfd + 1);
203 if (mfn < 0)
204 temp = -temp;
205 temp = (ref_clk * mfi) + temp;
206
207 return temp;
208}
209
210static int _clk_usb_pll_enable(struct clk *clk)
211{
212 u32 reg;
213
214 reg = __raw_readl(MXC_CCM_CCMR);
215 reg |= MXC_CCM_CCMR_UPE;
216 __raw_writel(reg, MXC_CCM_CCMR);
217
218 /* No lock bit on MX31, so using max time from spec */
219 udelay(80);
220
221 return 0;
222}
223
224static void _clk_usb_pll_disable(struct clk *clk)
225{
226 u32 reg;
227
228 reg = __raw_readl(MXC_CCM_CCMR);
229 reg &= ~MXC_CCM_CCMR_UPE;
230 __raw_writel(reg, MXC_CCM_CCMR);
231}
232
233static int _clk_serial_pll_enable(struct clk *clk)
234{
235 u32 reg;
236
237 reg = __raw_readl(MXC_CCM_CCMR);
238 reg |= MXC_CCM_CCMR_SPE;
239 __raw_writel(reg, MXC_CCM_CCMR);
240
241 /* No lock bit on MX31, so using max time from spec */
242 udelay(80);
243
244 return 0;
245}
246
247static void _clk_serial_pll_disable(struct clk *clk)
248{
249 u32 reg;
250
251 reg = __raw_readl(MXC_CCM_CCMR);
252 reg &= ~MXC_CCM_CCMR_SPE;
253 __raw_writel(reg, MXC_CCM_CCMR);
254}
255
256#define PDR0(mask, off) ((__raw_readl(MXC_CCM_PDR0) & mask) >> off)
257#define PDR1(mask, off) ((__raw_readl(MXC_CCM_PDR1) & mask) >> off)
258#define PDR2(mask, off) ((__raw_readl(MXC_CCM_PDR2) & mask) >> off)
259
260static unsigned long _clk_mcu_main_get_rate(struct clk *clk)
261{
262 u32 pmcr0 = __raw_readl(MXC_CCM_PMCR0);
263
264 if ((pmcr0 & MXC_CCM_PMCR0_DFSUP1) == MXC_CCM_PMCR0_DFSUP1_SPLL)
265 return clk_get_rate(&serial_pll_clk);
266 else
267 return clk_get_rate(&mcu_pll_clk);
268}
269
270static unsigned long _clk_hclk_get_rate(struct clk *clk)
271{
272 unsigned long max_pdf;
273
274 max_pdf = PDR0(MXC_CCM_PDR0_MAX_PODF_MASK,
275 MXC_CCM_PDR0_MAX_PODF_OFFSET);
276 return clk_get_rate(clk->parent) / (max_pdf + 1);
277}
278
279static unsigned long _clk_ipg_get_rate(struct clk *clk)
280{
281 unsigned long ipg_pdf;
282
283 ipg_pdf = PDR0(MXC_CCM_PDR0_IPG_PODF_MASK,
284 MXC_CCM_PDR0_IPG_PODF_OFFSET);
285 return clk_get_rate(clk->parent) / (ipg_pdf + 1);
286}
287
288static unsigned long _clk_nfc_get_rate(struct clk *clk)
289{
290 unsigned long nfc_pdf;
291
292 nfc_pdf = PDR0(MXC_CCM_PDR0_NFC_PODF_MASK,
293 MXC_CCM_PDR0_NFC_PODF_OFFSET);
294 return clk_get_rate(clk->parent) / (nfc_pdf + 1);
295}
296
297static unsigned long _clk_hsp_get_rate(struct clk *clk)
298{
299 unsigned long hsp_pdf;
300
301 hsp_pdf = PDR0(MXC_CCM_PDR0_HSP_PODF_MASK,
302 MXC_CCM_PDR0_HSP_PODF_OFFSET);
303 return clk_get_rate(clk->parent) / (hsp_pdf + 1);
304}
305
306static unsigned long _clk_usb_get_rate(struct clk *clk)
307{
308 unsigned long usb_pdf, usb_prepdf;
309
310 usb_pdf = PDR1(MXC_CCM_PDR1_USB_PODF_MASK,
311 MXC_CCM_PDR1_USB_PODF_OFFSET);
312 usb_prepdf = PDR1(MXC_CCM_PDR1_USB_PRDF_MASK,
313 MXC_CCM_PDR1_USB_PRDF_OFFSET);
314 return clk_get_rate(clk->parent) / (usb_prepdf + 1) / (usb_pdf + 1);
315}
316
317static unsigned long _clk_csi_get_rate(struct clk *clk)
318{
319 u32 reg, pre, post;
320
321 reg = __raw_readl(MXC_CCM_PDR0);
322 pre = (reg & MXC_CCM_PDR0_CSI_PRDF_MASK) >>
323 MXC_CCM_PDR0_CSI_PRDF_OFFSET;
324 pre++;
325 post = (reg & MXC_CCM_PDR0_CSI_PODF_MASK) >>
326 MXC_CCM_PDR0_CSI_PODF_OFFSET;
327 post++;
328 return clk_get_rate(clk->parent) / (pre * post);
329}
330
331static unsigned long _clk_csi_round_rate(struct clk *clk, unsigned long rate)
332{
333 u32 pre, post, parent = clk_get_rate(clk->parent);
334 u32 div = parent / rate;
335
336 if (parent % rate)
337 div++;
338
339 __calc_pre_post_dividers(div, &pre, &post);
340
341 return parent / (pre * post);
342}
343
344static int _clk_csi_set_rate(struct clk *clk, unsigned long rate)
345{
346 u32 reg, div, pre, post, parent = clk_get_rate(clk->parent);
347
348 div = parent / rate;
349
350 if ((parent / div) != rate)
351 return -EINVAL;
352
353 __calc_pre_post_dividers(div, &pre, &post);
354
355 /* Set CSI clock divider */
356 reg = __raw_readl(MXC_CCM_PDR0) &
357 ~(MXC_CCM_PDR0_CSI_PODF_MASK | MXC_CCM_PDR0_CSI_PRDF_MASK);
358 reg |= (post - 1) << MXC_CCM_PDR0_CSI_PODF_OFFSET;
359 reg |= (pre - 1) << MXC_CCM_PDR0_CSI_PRDF_OFFSET;
360 __raw_writel(reg, MXC_CCM_PDR0);
361
362 return 0;
363}
364
365static unsigned long _clk_per_get_rate(struct clk *clk)
366{
367 unsigned long per_pdf;
368
369 per_pdf = PDR0(MXC_CCM_PDR0_PER_PODF_MASK,
370 MXC_CCM_PDR0_PER_PODF_OFFSET);
371 return clk_get_rate(clk->parent) / (per_pdf + 1);
372}
373
374static unsigned long _clk_ssi1_get_rate(struct clk *clk)
375{
376 unsigned long ssi1_pdf, ssi1_prepdf;
377
378 ssi1_pdf = PDR1(MXC_CCM_PDR1_SSI1_PODF_MASK,
379 MXC_CCM_PDR1_SSI1_PODF_OFFSET);
380 ssi1_prepdf = PDR1(MXC_CCM_PDR1_SSI1_PRE_PODF_MASK,
381 MXC_CCM_PDR1_SSI1_PRE_PODF_OFFSET);
382 return clk_get_rate(clk->parent) / (ssi1_prepdf + 1) / (ssi1_pdf + 1);
383}
384
385static unsigned long _clk_ssi2_get_rate(struct clk *clk)
386{
387 unsigned long ssi2_pdf, ssi2_prepdf;
388
389 ssi2_pdf = PDR1(MXC_CCM_PDR1_SSI2_PODF_MASK,
390 MXC_CCM_PDR1_SSI2_PODF_OFFSET);
391 ssi2_prepdf = PDR1(MXC_CCM_PDR1_SSI2_PRE_PODF_MASK,
392 MXC_CCM_PDR1_SSI2_PRE_PODF_OFFSET);
393 return clk_get_rate(clk->parent) / (ssi2_prepdf + 1) / (ssi2_pdf + 1);
394}
395
396static unsigned long _clk_firi_get_rate(struct clk *clk)
397{
398 unsigned long firi_pdf, firi_prepdf;
399
400 firi_pdf = PDR1(MXC_CCM_PDR1_FIRI_PODF_MASK,
401 MXC_CCM_PDR1_FIRI_PODF_OFFSET);
402 firi_prepdf = PDR1(MXC_CCM_PDR1_FIRI_PRE_PODF_MASK,
403 MXC_CCM_PDR1_FIRI_PRE_PODF_OFFSET);
404 return clk_get_rate(clk->parent) / (firi_prepdf + 1) / (firi_pdf + 1);
405}
406
407static unsigned long _clk_firi_round_rate(struct clk *clk, unsigned long rate)
408{
409 u32 pre, post;
410 u32 parent = clk_get_rate(clk->parent);
411 u32 div = parent / rate;
412
413 if (parent % rate)
414 div++;
415
416 __calc_pre_post_dividers(div, &pre, &post);
417
418 return parent / (pre * post);
419
420}
421
422static int _clk_firi_set_rate(struct clk *clk, unsigned long rate)
423{
424 u32 reg, div, pre, post, parent = clk_get_rate(clk->parent);
425
426 div = parent / rate;
427
428 if ((parent / div) != rate)
429 return -EINVAL;
430
431 __calc_pre_post_dividers(div, &pre, &post);
432
433 /* Set FIRI clock divider */
434 reg = __raw_readl(MXC_CCM_PDR1) &
435 ~(MXC_CCM_PDR1_FIRI_PODF_MASK | MXC_CCM_PDR1_FIRI_PRE_PODF_MASK);
436 reg |= (pre - 1) << MXC_CCM_PDR1_FIRI_PRE_PODF_OFFSET;
437 reg |= (post - 1) << MXC_CCM_PDR1_FIRI_PODF_OFFSET;
438 __raw_writel(reg, MXC_CCM_PDR1);
439
440 return 0;
441}
442
443static unsigned long _clk_mbx_get_rate(struct clk *clk)
444{
445 return clk_get_rate(clk->parent) / 2;
446}
447
448static unsigned long _clk_mstick1_get_rate(struct clk *clk)
449{
450 unsigned long msti_pdf;
451
452 msti_pdf = PDR2(MXC_CCM_PDR2_MST1_PDF_MASK,
453 MXC_CCM_PDR2_MST1_PDF_OFFSET);
454 return clk_get_rate(clk->parent) / (msti_pdf + 1);
455}
456
457static unsigned long _clk_mstick2_get_rate(struct clk *clk)
458{
459 unsigned long msti_pdf;
460
461 msti_pdf = PDR2(MXC_CCM_PDR2_MST2_PDF_MASK,
462 MXC_CCM_PDR2_MST2_PDF_OFFSET);
463 return clk_get_rate(clk->parent) / (msti_pdf + 1);
464}
465
466static unsigned long ckih_rate;
467
468static unsigned long clk_ckih_get_rate(struct clk *clk)
469{
470 return ckih_rate;
471}
472
473static struct clk ckih_clk = {
474 .name = "ckih",
475 .get_rate = clk_ckih_get_rate,
476};
477
478static unsigned long clk_ckil_get_rate(struct clk *clk)
479{
480 return CKIL_CLK_FREQ;
481}
482
483static struct clk ckil_clk = {
484 .name = "ckil",
485 .get_rate = clk_ckil_get_rate,
486};
487
488static struct clk mcu_pll_clk = {
489 .name = "mcu_pll",
490 .parent = &ckih_clk,
491 .set_rate = _clk_pll_set_rate,
492 .get_rate = _clk_pll_get_rate,
493};
494
495static struct clk mcu_main_clk = {
496 .name = "mcu_main_clk",
497 .parent = &mcu_pll_clk,
498 .get_rate = _clk_mcu_main_get_rate,
499};
500
501static struct clk serial_pll_clk = {
502 .name = "serial_pll",
503 .parent = &ckih_clk,
504 .set_rate = _clk_pll_set_rate,
505 .get_rate = _clk_pll_get_rate,
506 .enable = _clk_serial_pll_enable,
507 .disable = _clk_serial_pll_disable,
508};
509
510static struct clk usb_pll_clk = {
511 .name = "usb_pll",
512 .parent = &ckih_clk,
513 .set_rate = _clk_pll_set_rate,
514 .get_rate = _clk_pll_get_rate,
515 .enable = _clk_usb_pll_enable,
516 .disable = _clk_usb_pll_disable,
517};
518
519static struct clk ahb_clk = {
520 .name = "ahb_clk",
521 .parent = &mcu_main_clk,
522 .get_rate = _clk_hclk_get_rate,
523};
524
525static struct clk per_clk = {
526 .name = "per_clk",
527 .parent = &usb_pll_clk,
528 .get_rate = _clk_per_get_rate,
529};
530
531static struct clk perclk_clk = {
532 .name = "perclk_clk",
533 .parent = &ipg_clk,
534};
535
536static struct clk cspi_clk[] = {
537 {
538 .name = "cspi_clk",
539 .id = 0,
540 .parent = &ipg_clk,
541 .enable = _clk_enable,
542 .enable_reg = MXC_CCM_CGR2,
543 .enable_shift = MXC_CCM_CGR2_CSPI1_OFFSET,
544 .disable = _clk_disable,},
545 {
546 .name = "cspi_clk",
547 .id = 1,
548 .parent = &ipg_clk,
549 .enable = _clk_enable,
550 .enable_reg = MXC_CCM_CGR2,
551 .enable_shift = MXC_CCM_CGR2_CSPI2_OFFSET,
552 .disable = _clk_disable,},
553 {
554 .name = "cspi_clk",
555 .id = 2,
556 .parent = &ipg_clk,
557 .enable = _clk_enable,
558 .enable_reg = MXC_CCM_CGR0,
559 .enable_shift = MXC_CCM_CGR0_CSPI3_OFFSET,
560 .disable = _clk_disable,},
561};
562
563static struct clk ipg_clk = {
564 .name = "ipg_clk",
565 .parent = &ahb_clk,
566 .get_rate = _clk_ipg_get_rate,
567};
568
569static struct clk emi_clk = {
570 .name = "emi_clk",
571 .parent = &ahb_clk,
572 .enable = _clk_enable,
573 .enable_reg = MXC_CCM_CGR2,
574 .enable_shift = MXC_CCM_CGR2_EMI_OFFSET,
575 .disable = _clk_emi_disable,
576};
577
578static struct clk gpt_clk = {
579 .name = "gpt_clk",
580 .parent = &perclk_clk,
581 .enable = _clk_enable,
582 .enable_reg = MXC_CCM_CGR0,
583 .enable_shift = MXC_CCM_CGR0_GPT_OFFSET,
584 .disable = _clk_disable,
585};
586
587static struct clk pwm_clk = {
588 .name = "pwm_clk",
589 .parent = &perclk_clk,
590 .enable = _clk_enable,
591 .enable_reg = MXC_CCM_CGR0,
592 .enable_shift = MXC_CCM_CGR1_PWM_OFFSET,
593 .disable = _clk_disable,
594};
595
596static struct clk epit_clk[] = {
597 {
598 .name = "epit_clk",
599 .id = 0,
600 .parent = &perclk_clk,
601 .enable = _clk_enable,
602 .enable_reg = MXC_CCM_CGR0,
603 .enable_shift = MXC_CCM_CGR0_EPIT1_OFFSET,
604 .disable = _clk_disable,},
605 {
606 .name = "epit_clk",
607 .id = 1,
608 .parent = &perclk_clk,
609 .enable = _clk_enable,
610 .enable_reg = MXC_CCM_CGR0,
611 .enable_shift = MXC_CCM_CGR0_EPIT2_OFFSET,
612 .disable = _clk_disable,},
613};
614
615static struct clk nfc_clk = {
616 .name = "nfc_clk",
617 .parent = &ahb_clk,
618 .get_rate = _clk_nfc_get_rate,
619};
620
621static struct clk scc_clk = {
622 .name = "scc_clk",
623 .parent = &ipg_clk,
624};
625
626static struct clk ipu_clk = {
627 .name = "ipu_clk",
628 .parent = &mcu_main_clk,
629 .get_rate = _clk_hsp_get_rate,
630 .enable = _clk_enable,
631 .enable_reg = MXC_CCM_CGR1,
632 .enable_shift = MXC_CCM_CGR1_IPU_OFFSET,
633 .disable = _clk_disable,
634};
635
636static struct clk kpp_clk = {
637 .name = "kpp_clk",
638 .parent = &ipg_clk,
639 .enable = _clk_enable,
640 .enable_reg = MXC_CCM_CGR1,
641 .enable_shift = MXC_CCM_CGR1_KPP_OFFSET,
642 .disable = _clk_disable,
643};
644
645static struct clk wdog_clk = {
646 .name = "wdog_clk",
647 .parent = &ipg_clk,
648 .enable = _clk_enable,
649 .enable_reg = MXC_CCM_CGR1,
650 .enable_shift = MXC_CCM_CGR1_WDOG_OFFSET,
651 .disable = _clk_disable,
652};
653static struct clk rtc_clk = {
654 .name = "rtc_clk",
655 .parent = &ipg_clk,
656 .enable = _clk_enable,
657 .enable_reg = MXC_CCM_CGR1,
658 .enable_shift = MXC_CCM_CGR1_RTC_OFFSET,
659 .disable = _clk_disable,
660};
661
662static struct clk usb_clk[] = {
663 {
664 .name = "usb_clk",
665 .parent = &usb_pll_clk,
666 .get_rate = _clk_usb_get_rate,},
667 {
668 .name = "usb_ahb_clk",
669 .parent = &ahb_clk,
670 .enable = _clk_enable,
671 .enable_reg = MXC_CCM_CGR1,
672 .enable_shift = MXC_CCM_CGR1_USBOTG_OFFSET,
673 .disable = _clk_disable,},
674};
675
676static struct clk csi_clk = {
677 .name = "csi_clk",
678 .parent = &serial_pll_clk,
679 .get_rate = _clk_csi_get_rate,
680 .round_rate = _clk_csi_round_rate,
681 .set_rate = _clk_csi_set_rate,
682 .enable = _clk_enable,
683 .enable_reg = MXC_CCM_CGR1,
684 .enable_shift = MXC_CCM_CGR1_CSI_OFFSET,
685 .disable = _clk_disable,
686};
687
688static struct clk uart_clk[] = {
689 {
690 .name = "uart_clk",
691 .id = 0,
692 .parent = &perclk_clk,
693 .enable = _clk_enable,
694 .enable_reg = MXC_CCM_CGR0,
695 .enable_shift = MXC_CCM_CGR0_UART1_OFFSET,
696 .disable = _clk_disable,},
697 {
698 .name = "uart_clk",
699 .id = 1,
700 .parent = &perclk_clk,
701 .enable = _clk_enable,
702 .enable_reg = MXC_CCM_CGR0,
703 .enable_shift = MXC_CCM_CGR0_UART2_OFFSET,
704 .disable = _clk_disable,},
705 {
706 .name = "uart_clk",
707 .id = 2,
708 .parent = &perclk_clk,
709 .enable = _clk_enable,
710 .enable_reg = MXC_CCM_CGR1,
711 .enable_shift = MXC_CCM_CGR1_UART3_OFFSET,
712 .disable = _clk_disable,},
713 {
714 .name = "uart_clk",
715 .id = 3,
716 .parent = &perclk_clk,
717 .enable = _clk_enable,
718 .enable_reg = MXC_CCM_CGR1,
719 .enable_shift = MXC_CCM_CGR1_UART4_OFFSET,
720 .disable = _clk_disable,},
721 {
722 .name = "uart_clk",
723 .id = 4,
724 .parent = &perclk_clk,
725 .enable = _clk_enable,
726 .enable_reg = MXC_CCM_CGR1,
727 .enable_shift = MXC_CCM_CGR1_UART5_OFFSET,
728 .disable = _clk_disable,},
729};
730
731static struct clk i2c_clk[] = {
732 {
733 .name = "i2c_clk",
734 .id = 0,
735 .parent = &perclk_clk,
736 .enable = _clk_enable,
737 .enable_reg = MXC_CCM_CGR0,
738 .enable_shift = MXC_CCM_CGR0_I2C1_OFFSET,
739 .disable = _clk_disable,},
740 {
741 .name = "i2c_clk",
742 .id = 1,
743 .parent = &perclk_clk,
744 .enable = _clk_enable,
745 .enable_reg = MXC_CCM_CGR0,
746 .enable_shift = MXC_CCM_CGR0_I2C2_OFFSET,
747 .disable = _clk_disable,},
748 {
749 .name = "i2c_clk",
750 .id = 2,
751 .parent = &perclk_clk,
752 .enable = _clk_enable,
753 .enable_reg = MXC_CCM_CGR0,
754 .enable_shift = MXC_CCM_CGR0_I2C3_OFFSET,
755 .disable = _clk_disable,},
756};
757
758static struct clk owire_clk = {
759 .name = "owire_clk",
760 .parent = &perclk_clk,
761 .enable_reg = MXC_CCM_CGR1,
762 .enable_shift = MXC_CCM_CGR1_OWIRE_OFFSET,
763 .enable = _clk_enable,
764 .disable = _clk_disable,
765};
766
767static struct clk sdhc_clk[] = {
768 {
769 .name = "sdhc_clk",
770 .id = 0,
771 .parent = &perclk_clk,
772 .enable = _clk_enable,
773 .enable_reg = MXC_CCM_CGR0,
774 .enable_shift = MXC_CCM_CGR0_SD_MMC1_OFFSET,
775 .disable = _clk_disable,},
776 {
777 .name = "sdhc_clk",
778 .id = 1,
779 .parent = &perclk_clk,
780 .enable = _clk_enable,
781 .enable_reg = MXC_CCM_CGR0,
782 .enable_shift = MXC_CCM_CGR0_SD_MMC2_OFFSET,
783 .disable = _clk_disable,},
784};
785
786static struct clk ssi_clk[] = {
787 {
788 .name = "ssi_clk",
789 .parent = &serial_pll_clk,
790 .get_rate = _clk_ssi1_get_rate,
791 .enable = _clk_enable,
792 .enable_reg = MXC_CCM_CGR0,
793 .enable_shift = MXC_CCM_CGR0_SSI1_OFFSET,
794 .disable = _clk_disable,},
795 {
796 .name = "ssi_clk",
797 .id = 1,
798 .parent = &serial_pll_clk,
799 .get_rate = _clk_ssi2_get_rate,
800 .enable = _clk_enable,
801 .enable_reg = MXC_CCM_CGR2,
802 .enable_shift = MXC_CCM_CGR2_SSI2_OFFSET,
803 .disable = _clk_disable,},
804};
805
806static struct clk firi_clk = {
807 .name = "firi_clk",
808 .parent = &usb_pll_clk,
809 .round_rate = _clk_firi_round_rate,
810 .set_rate = _clk_firi_set_rate,
811 .get_rate = _clk_firi_get_rate,
812 .enable = _clk_enable,
813 .enable_reg = MXC_CCM_CGR2,
814 .enable_shift = MXC_CCM_CGR2_FIRI_OFFSET,
815 .disable = _clk_disable,
816};
817
818static struct clk ata_clk = {
819 .name = "ata_clk",
820 .parent = &ipg_clk,
821 .enable = _clk_enable,
822 .enable_reg = MXC_CCM_CGR0,
823 .enable_shift = MXC_CCM_CGR0_ATA_OFFSET,
824 .disable = _clk_disable,
825};
826
827static struct clk mbx_clk = {
828 .name = "mbx_clk",
829 .parent = &ahb_clk,
830 .enable = _clk_enable,
831 .enable_reg = MXC_CCM_CGR2,
832 .enable_shift = MXC_CCM_CGR2_GACC_OFFSET,
833 .get_rate = _clk_mbx_get_rate,
834};
835
836static struct clk vpu_clk = {
837 .name = "vpu_clk",
838 .parent = &ahb_clk,
839 .enable = _clk_enable,
840 .enable_reg = MXC_CCM_CGR2,
841 .enable_shift = MXC_CCM_CGR2_GACC_OFFSET,
842 .get_rate = _clk_mbx_get_rate,
843};
844
845static struct clk rtic_clk = {
846 .name = "rtic_clk",
847 .parent = &ahb_clk,
848 .enable = _clk_enable,
849 .enable_reg = MXC_CCM_CGR2,
850 .enable_shift = MXC_CCM_CGR2_RTIC_OFFSET,
851 .disable = _clk_disable,
852};
853
854static struct clk rng_clk = {
855 .name = "rng_clk",
856 .parent = &ipg_clk,
857 .enable = _clk_enable,
858 .enable_reg = MXC_CCM_CGR0,
859 .enable_shift = MXC_CCM_CGR0_RNG_OFFSET,
860 .disable = _clk_disable,
861};
862
863static struct clk sdma_clk[] = {
864 {
865 .name = "sdma_ahb_clk",
866 .parent = &ahb_clk,
867 .enable = _clk_enable,
868 .enable_reg = MXC_CCM_CGR0,
869 .enable_shift = MXC_CCM_CGR0_SDMA_OFFSET,
870 .disable = _clk_disable,},
871 {
872 .name = "sdma_ipg_clk",
873 .parent = &ipg_clk,}
874};
875
876static struct clk mpeg4_clk = {
877 .name = "mpeg4_clk",
878 .parent = &ahb_clk,
879 .enable = _clk_enable,
880 .enable_reg = MXC_CCM_CGR1,
881 .enable_shift = MXC_CCM_CGR1_HANTRO_OFFSET,
882 .disable = _clk_disable,
883};
884
885static struct clk vl2cc_clk = {
886 .name = "vl2cc_clk",
887 .parent = &ahb_clk,
888 .enable = _clk_enable,
889 .enable_reg = MXC_CCM_CGR1,
890 .enable_shift = MXC_CCM_CGR1_HANTRO_OFFSET,
891 .disable = _clk_disable,
892};
893
894static struct clk mstick_clk[] = {
895 {
896 .name = "mstick_clk",
897 .id = 0,
898 .parent = &usb_pll_clk,
899 .get_rate = _clk_mstick1_get_rate,
900 .enable = _clk_enable,
901 .enable_reg = MXC_CCM_CGR1,
902 .enable_shift = MXC_CCM_CGR1_MEMSTICK1_OFFSET,
903 .disable = _clk_disable,},
904 {
905 .name = "mstick_clk",
906 .id = 1,
907 .parent = &usb_pll_clk,
908 .get_rate = _clk_mstick2_get_rate,
909 .enable = _clk_enable,
910 .enable_reg = MXC_CCM_CGR1,
911 .enable_shift = MXC_CCM_CGR1_MEMSTICK2_OFFSET,
912 .disable = _clk_disable,},
913};
914
915static struct clk iim_clk = {
916 .name = "iim_clk",
917 .parent = &ipg_clk,
918 .enable = _clk_enable,
919 .enable_reg = MXC_CCM_CGR0,
920 .enable_shift = MXC_CCM_CGR0_IIM_OFFSET,
921 .disable = _clk_disable,
922};
923
924static unsigned long _clk_cko1_round_rate(struct clk *clk, unsigned long rate)
925{
926 u32 div, parent = clk_get_rate(clk->parent);
927
928 div = parent / rate;
929 if (parent % rate)
930 div++;
931
932 if (div > 8)
933 div = 16;
934 else if (div > 4)
935 div = 8;
936 else if (div > 2)
937 div = 4;
938
939 return parent / div;
940}
941
942static int _clk_cko1_set_rate(struct clk *clk, unsigned long rate)
943{
944 u32 reg, div, parent = clk_get_rate(clk->parent);
945
946 div = parent / rate;
947
948 if (div == 16)
949 div = 4;
950 else if (div == 8)
951 div = 3;
952 else if (div == 4)
953 div = 2;
954 else if (div == 2)
955 div = 1;
956 else if (div == 1)
957 div = 0;
958 else
959 return -EINVAL;
960
961 reg = __raw_readl(MXC_CCM_COSR) & ~MXC_CCM_COSR_CLKOUTDIV_MASK;
962 reg |= div << MXC_CCM_COSR_CLKOUTDIV_OFFSET;
963 __raw_writel(reg, MXC_CCM_COSR);
964
965 return 0;
966}
967
968static unsigned long _clk_cko1_get_rate(struct clk *clk)
969{
970 u32 div;
971
972 div = __raw_readl(MXC_CCM_COSR) & MXC_CCM_COSR_CLKOUTDIV_MASK >>
973 MXC_CCM_COSR_CLKOUTDIV_OFFSET;
974
975 return clk_get_rate(clk->parent) / (1 << div);
976}
977
978static int _clk_cko1_set_parent(struct clk *clk, struct clk *parent)
979{
980 u32 reg;
981
982 reg = __raw_readl(MXC_CCM_COSR) & ~MXC_CCM_COSR_CLKOSEL_MASK;
983
984 if (parent == &mcu_main_clk)
985 reg |= 0 << MXC_CCM_COSR_CLKOSEL_OFFSET;
986 else if (parent == &ipg_clk)
987 reg |= 1 << MXC_CCM_COSR_CLKOSEL_OFFSET;
988 else if (parent == &usb_pll_clk)
989 reg |= 2 << MXC_CCM_COSR_CLKOSEL_OFFSET;
990 else if (parent == mcu_main_clk.parent)
991 reg |= 3 << MXC_CCM_COSR_CLKOSEL_OFFSET;
992 else if (parent == &ahb_clk)
993 reg |= 5 << MXC_CCM_COSR_CLKOSEL_OFFSET;
994 else if (parent == &serial_pll_clk)
995 reg |= 7 << MXC_CCM_COSR_CLKOSEL_OFFSET;
996 else if (parent == &ckih_clk)
997 reg |= 8 << MXC_CCM_COSR_CLKOSEL_OFFSET;
998 else if (parent == &emi_clk)
999 reg |= 9 << MXC_CCM_COSR_CLKOSEL_OFFSET;
1000 else if (parent == &ipu_clk)
1001 reg |= 0xA << MXC_CCM_COSR_CLKOSEL_OFFSET;
1002 else if (parent == &nfc_clk)
1003 reg |= 0xB << MXC_CCM_COSR_CLKOSEL_OFFSET;
1004 else if (parent == &uart_clk[0])
1005 reg |= 0xC << MXC_CCM_COSR_CLKOSEL_OFFSET;
1006 else
1007 return -EINVAL;
1008
1009 __raw_writel(reg, MXC_CCM_COSR);
1010
1011 return 0;
1012}
1013
1014static int _clk_cko1_enable(struct clk *clk)
1015{
1016 u32 reg;
1017
1018 reg = __raw_readl(MXC_CCM_COSR) | MXC_CCM_COSR_CLKOEN;
1019 __raw_writel(reg, MXC_CCM_COSR);
1020
1021 return 0;
1022}
1023
1024static void _clk_cko1_disable(struct clk *clk)
1025{
1026 u32 reg;
1027
1028 reg = __raw_readl(MXC_CCM_COSR) & ~MXC_CCM_COSR_CLKOEN;
1029 __raw_writel(reg, MXC_CCM_COSR);
1030}
1031
1032static struct clk cko1_clk = {
1033 .name = "cko1_clk",
1034 .get_rate = _clk_cko1_get_rate,
1035 .set_rate = _clk_cko1_set_rate,
1036 .round_rate = _clk_cko1_round_rate,
1037 .set_parent = _clk_cko1_set_parent,
1038 .enable = _clk_cko1_enable,
1039 .disable = _clk_cko1_disable,
1040};
1041
1042static struct clk *mxc_clks[] = {
1043 &ckih_clk,
1044 &ckil_clk,
1045 &mcu_pll_clk,
1046 &usb_pll_clk,
1047 &serial_pll_clk,
1048 &mcu_main_clk,
1049 &ahb_clk,
1050 &per_clk,
1051 &perclk_clk,
1052 &cko1_clk,
1053 &emi_clk,
1054 &cspi_clk[0],
1055 &cspi_clk[1],
1056 &cspi_clk[2],
1057 &ipg_clk,
1058 &gpt_clk,
1059 &pwm_clk,
1060 &wdog_clk,
1061 &rtc_clk,
1062 &epit_clk[0],
1063 &epit_clk[1],
1064 &nfc_clk,
1065 &ipu_clk,
1066 &kpp_clk,
1067 &usb_clk[0],
1068 &usb_clk[1],
1069 &csi_clk,
1070 &uart_clk[0],
1071 &uart_clk[1],
1072 &uart_clk[2],
1073 &uart_clk[3],
1074 &uart_clk[4],
1075 &i2c_clk[0],
1076 &i2c_clk[1],
1077 &i2c_clk[2],
1078 &owire_clk,
1079 &sdhc_clk[0],
1080 &sdhc_clk[1],
1081 &ssi_clk[0],
1082 &ssi_clk[1],
1083 &firi_clk,
1084 &ata_clk,
1085 &rtic_clk,
1086 &rng_clk,
1087 &sdma_clk[0],
1088 &sdma_clk[1],
1089 &mstick_clk[0],
1090 &mstick_clk[1],
1091 &scc_clk,
1092 &iim_clk,
1093};
1094
1095int __init mxc_clocks_init(unsigned long fref)
1096{
1097 u32 reg;
1098 struct clk **clkp;
1099
1100 ckih_rate = fref;
1101
1102 for (clkp = mxc_clks; clkp < mxc_clks + ARRAY_SIZE(mxc_clks); clkp++)
1103 clk_register(*clkp);
1104
1105 if (cpu_is_mx31()) {
1106 clk_register(&mpeg4_clk);
1107 clk_register(&mbx_clk);
1108 } else {
1109 clk_register(&vpu_clk);
1110 clk_register(&vl2cc_clk);
1111 }
1112
1113 /* Turn off all possible clocks */
1114 __raw_writel(MXC_CCM_CGR0_GPT_MASK, MXC_CCM_CGR0);
1115 __raw_writel(0, MXC_CCM_CGR1);
1116
1117 __raw_writel(MXC_CCM_CGR2_EMI_MASK |
1118 MXC_CCM_CGR2_IPMUX1_MASK |
1119 MXC_CCM_CGR2_IPMUX2_MASK |
1120 MXC_CCM_CGR2_MXCCLKENSEL_MASK | /* for MX32 */
1121 MXC_CCM_CGR2_CHIKCAMPEN_MASK | /* for MX32 */
1122 MXC_CCM_CGR2_OVRVPUBUSY_MASK | /* for MX32 */
1123 1 << 27 | 1 << 28, /* Bit 27 and 28 are not defined for
1124 MX32, but still required to be set */
1125 MXC_CCM_CGR2);
1126
1127 clk_disable(&cko1_clk);
1128 clk_disable(&usb_pll_clk);
1129
1130 pr_info("Clock input source is %ld\n", clk_get_rate(&ckih_clk));
1131
1132 clk_enable(&gpt_clk);
1133 clk_enable(&emi_clk);
1134 clk_enable(&iim_clk);
1135
1136 clk_enable(&serial_pll_clk);
1137
1138 if (mx31_revision() >= CHIP_REV_2_0) {
1139 reg = __raw_readl(MXC_CCM_PMCR1);
1140 /* No PLL restart on DVFS switch; enable auto EMI handshake */
1141 reg |= MXC_CCM_PMCR1_PLLRDIS | MXC_CCM_PMCR1_EMIRQ_EN;
1142 __raw_writel(reg, MXC_CCM_PMCR1);
1143 }
1144
1145 return 0;
1146}
1147
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-06 01:02:20 -0500