1 /*
2 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
4 * Copyright 2008 Martin Fuzzey, mfuzzey@gmail.com
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
18 * MA 02110-1301, USA.
19 */
20
21 #include <linux/clk.h>
22 #include <linux/io.h>
23 #include <linux/module.h>
24 #include <linux/clkdev.h>
25
26 #include <asm/div64.h>
27
28 #include <mach/clock.h>
29 #include <mach/common.h>
30 #include <mach/hardware.h>
31
32 #define IO_ADDR_CCM(off) (MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR + (off)))
33
34 /* Register offsets */
35 #define CCM_CSCR IO_ADDR_CCM(0x0)
36 #define CCM_MPCTL0 IO_ADDR_CCM(0x4)
37 #define CCM_MPCTL1 IO_ADDR_CCM(0x8)
38 #define CCM_SPCTL0 IO_ADDR_CCM(0xc)
39 #define CCM_SPCTL1 IO_ADDR_CCM(0x10)
40 #define CCM_OSC26MCTL IO_ADDR_CCM(0x14)
41 #define CCM_PCDR0 IO_ADDR_CCM(0x18)
42 #define CCM_PCDR1 IO_ADDR_CCM(0x1c)
43 #define CCM_PCCR0 IO_ADDR_CCM(0x20)
44 #define CCM_PCCR1 IO_ADDR_CCM(0x24)
45 #define CCM_CCSR IO_ADDR_CCM(0x28)
46 #define CCM_PMCTL IO_ADDR_CCM(0x2c)
47 #define CCM_PMCOUNT IO_ADDR_CCM(0x30)
48 #define CCM_WKGDCTL IO_ADDR_CCM(0x34)
49
50 #define CCM_CSCR_UPDATE_DIS (1 << 31)
51 #define CCM_CSCR_SSI2 (1 << 23)
52 #define CCM_CSCR_SSI1 (1 << 22)
53 #define CCM_CSCR_VPU (1 << 21)
54 #define CCM_CSCR_MSHC (1 << 20)
55 #define CCM_CSCR_SPLLRES (1 << 19)
56 #define CCM_CSCR_MPLLRES (1 << 18)
57 #define CCM_CSCR_SP (1 << 17)
58 #define CCM_CSCR_MCU (1 << 16)
59 #define CCM_CSCR_OSC26MDIV (1 << 4)
60 #define CCM_CSCR_OSC26M (1 << 3)
61 #define CCM_CSCR_FPM (1 << 2)
62 #define CCM_CSCR_SPEN (1 << 1)
63 #define CCM_CSCR_MPEN (1 << 0)
64
65 /* i.MX27 TO 2+ */
66 #define CCM_CSCR_ARM_SRC (1 << 15)
67
68 #define CCM_SPCTL1_LF (1 << 15)
69 #define CCM_SPCTL1_BRMO (1 << 6)
70
71 static struct clk mpll_main1_clk, mpll_main2_clk;
72
clk_pccr_enable(struct clk * clk)73 static int clk_pccr_enable(struct clk *clk)
74 {
75 unsigned long reg;
76
77 if (!clk->enable_reg)
78 return 0;
79
80 reg = __raw_readl(clk->enable_reg);
81 reg |= 1 << clk->enable_shift;
82 __raw_writel(reg, clk->enable_reg);
83
84 return 0;
85 }
86
clk_pccr_disable(struct clk * clk)87 static void clk_pccr_disable(struct clk *clk)
88 {
89 unsigned long reg;
90
91 if (!clk->enable_reg)
92 return;
93
94 reg = __raw_readl(clk->enable_reg);
95 reg &= ~(1 << clk->enable_shift);
96 __raw_writel(reg, clk->enable_reg);
97 }
98
clk_spll_enable(struct clk * clk)99 static int clk_spll_enable(struct clk *clk)
100 {
101 unsigned long reg;
102
103 reg = __raw_readl(CCM_CSCR);
104 reg |= CCM_CSCR_SPEN;
105 __raw_writel(reg, CCM_CSCR);
106
107 while (!(__raw_readl(CCM_SPCTL1) & CCM_SPCTL1_LF));
108
109 return 0;
110 }
111
clk_spll_disable(struct clk * clk)112 static void clk_spll_disable(struct clk *clk)
113 {
114 unsigned long reg;
115
116 reg = __raw_readl(CCM_CSCR);
117 reg &= ~CCM_CSCR_SPEN;
118 __raw_writel(reg, CCM_CSCR);
119 }
120
clk_cpu_set_parent(struct clk * clk,struct clk * parent)121 static int clk_cpu_set_parent(struct clk *clk, struct clk *parent)
122 {
123 int cscr = __raw_readl(CCM_CSCR);
124
125 if (clk->parent == parent)
126 return 0;
127
128 if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
129 if (parent == &mpll_main1_clk) {
130 cscr |= CCM_CSCR_ARM_SRC;
131 } else {
132 if (parent == &mpll_main2_clk)
133 cscr &= ~CCM_CSCR_ARM_SRC;
134 else
135 return -EINVAL;
136 }
137 __raw_writel(cscr, CCM_CSCR);
138 clk->parent = parent;
139 return 0;
140 }
141 return -ENODEV;
142 }
143
round_rate_cpu(struct clk * clk,unsigned long rate)144 static unsigned long round_rate_cpu(struct clk *clk, unsigned long rate)
145 {
146 int div;
147 unsigned long parent_rate;
148
149 parent_rate = clk_get_rate(clk->parent);
150
151 div = parent_rate / rate;
152 if (parent_rate % rate)
153 div++;
154
155 if (div > 4)
156 div = 4;
157
158 return parent_rate / div;
159 }
160
set_rate_cpu(struct clk * clk,unsigned long rate)161 static int set_rate_cpu(struct clk *clk, unsigned long rate)
162 {
163 unsigned int div;
164 uint32_t reg;
165 unsigned long parent_rate;
166
167 parent_rate = clk_get_rate(clk->parent);
168
169 div = parent_rate / rate;
170
171 if (div > 4 || div < 1 || ((parent_rate / div) != rate))
172 return -EINVAL;
173
174 div--;
175
176 reg = __raw_readl(CCM_CSCR);
177 if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
178 reg &= ~(3 << 12);
179 reg |= div << 12;
180 reg &= ~(CCM_CSCR_FPM | CCM_CSCR_SPEN);
181 __raw_writel(reg | CCM_CSCR_UPDATE_DIS, CCM_CSCR);
182 } else {
183 printk(KERN_ERR "Can't set CPU frequency!\n");
184 }
185
186 return 0;
187 }
188
round_rate_per(struct clk * clk,unsigned long rate)189 static unsigned long round_rate_per(struct clk *clk, unsigned long rate)
190 {
191 u32 div;
192 unsigned long parent_rate;
193
194 parent_rate = clk_get_rate(clk->parent);
195
196 div = parent_rate / rate;
197 if (parent_rate % rate)
198 div++;
199
200 if (div > 64)
201 div = 64;
202
203 return parent_rate / div;
204 }
205
set_rate_per(struct clk * clk,unsigned long rate)206 static int set_rate_per(struct clk *clk, unsigned long rate)
207 {
208 u32 reg;
209 u32 div;
210 unsigned long parent_rate;
211
212 parent_rate = clk_get_rate(clk->parent);
213
214 if (clk->id < 0 || clk->id > 3)
215 return -EINVAL;
216
217 div = parent_rate / rate;
218 if (div > 64 || div < 1 || ((parent_rate / div) != rate))
219 return -EINVAL;
220 div--;
221
222 reg = __raw_readl(CCM_PCDR1) & ~(0x3f << (clk->id << 3));
223 reg |= div << (clk->id << 3);
224 __raw_writel(reg, CCM_PCDR1);
225
226 return 0;
227 }
228
get_rate_usb(struct clk * clk)229 static unsigned long get_rate_usb(struct clk *clk)
230 {
231 unsigned long usb_pdf;
232 unsigned long parent_rate;
233
234 parent_rate = clk_get_rate(clk->parent);
235
236 usb_pdf = (__raw_readl(CCM_CSCR) >> 28) & 0x7;
237
238 return parent_rate / (usb_pdf + 1U);
239 }
240
get_rate_ssix(struct clk * clk,unsigned long pdf)241 static unsigned long get_rate_ssix(struct clk *clk, unsigned long pdf)
242 {
243 unsigned long parent_rate;
244
245 parent_rate = clk_get_rate(clk->parent);
246
247 if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
248 pdf += 4; /* MX27 TO2+ */
249 else
250 pdf = (pdf < 2) ? 124UL : pdf; /* MX21 & MX27 TO1 */
251
252 return 2UL * parent_rate / pdf;
253 }
254
get_rate_ssi1(struct clk * clk)255 static unsigned long get_rate_ssi1(struct clk *clk)
256 {
257 return get_rate_ssix(clk, (__raw_readl(CCM_PCDR0) >> 16) & 0x3f);
258 }
259
get_rate_ssi2(struct clk * clk)260 static unsigned long get_rate_ssi2(struct clk *clk)
261 {
262 return get_rate_ssix(clk, (__raw_readl(CCM_PCDR0) >> 26) & 0x3f);
263 }
264
get_rate_nfc(struct clk * clk)265 static unsigned long get_rate_nfc(struct clk *clk)
266 {
267 unsigned long nfc_pdf;
268 unsigned long parent_rate;
269
270 parent_rate = clk_get_rate(clk->parent);
271
272 if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
273 nfc_pdf = (__raw_readl(CCM_PCDR0) >> 6) & 0xf;
274 else
275 nfc_pdf = (__raw_readl(CCM_PCDR0) >> 12) & 0xf;
276
277 return parent_rate / (nfc_pdf + 1);
278 }
279
get_rate_vpu(struct clk * clk)280 static unsigned long get_rate_vpu(struct clk *clk)
281 {
282 unsigned long vpu_pdf;
283 unsigned long parent_rate;
284
285 parent_rate = clk_get_rate(clk->parent);
286
287 if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
288 vpu_pdf = (__raw_readl(CCM_PCDR0) >> 10) & 0x3f;
289 vpu_pdf += 4;
290 } else {
291 vpu_pdf = (__raw_readl(CCM_PCDR0) >> 8) & 0xf;
292 vpu_pdf = (vpu_pdf < 2) ? 124 : vpu_pdf;
293 }
294
295 return 2UL * parent_rate / vpu_pdf;
296 }
297
round_rate_parent(struct clk * clk,unsigned long rate)298 static unsigned long round_rate_parent(struct clk *clk, unsigned long rate)
299 {
300 return clk->parent->round_rate(clk->parent, rate);
301 }
302
get_rate_parent(struct clk * clk)303 static unsigned long get_rate_parent(struct clk *clk)
304 {
305 return clk_get_rate(clk->parent);
306 }
307
set_rate_parent(struct clk * clk,unsigned long rate)308 static int set_rate_parent(struct clk *clk, unsigned long rate)
309 {
310 return clk->parent->set_rate(clk->parent, rate);
311 }
312
313 /* in Hz */
314 static unsigned long external_high_reference = 26000000;
315
get_rate_high_reference(struct clk * clk)316 static unsigned long get_rate_high_reference(struct clk *clk)
317 {
318 return external_high_reference;
319 }
320
321 /* in Hz */
322 static unsigned long external_low_reference = 32768;
323
get_rate_low_reference(struct clk * clk)324 static unsigned long get_rate_low_reference(struct clk *clk)
325 {
326 return external_low_reference;
327 }
328
get_rate_fpm(struct clk * clk)329 static unsigned long get_rate_fpm(struct clk *clk)
330 {
331 return clk_get_rate(clk->parent) * 1024;
332 }
333
get_rate_mpll(struct clk * clk)334 static unsigned long get_rate_mpll(struct clk *clk)
335 {
336 return mxc_decode_pll(__raw_readl(CCM_MPCTL0),
337 clk_get_rate(clk->parent));
338 }
339
get_rate_mpll_main(struct clk * clk)340 static unsigned long get_rate_mpll_main(struct clk *clk)
341 {
342 unsigned long parent_rate;
343
344 parent_rate = clk_get_rate(clk->parent);
345
346 /* i.MX27 TO2:
347 * clk->id == 0: arm clock source path 1 which is from 2 * MPLL / 2
348 * clk->id == 1: arm clock source path 2 which is from 2 * MPLL / 3
349 */
350 if (mx27_revision() >= IMX_CHIP_REVISION_2_0 && clk->id == 1)
351 return 2UL * parent_rate / 3UL;
352
353 return parent_rate;
354 }
355
get_rate_spll(struct clk * clk)356 static unsigned long get_rate_spll(struct clk *clk)
357 {
358 uint32_t reg;
359 unsigned long rate;
360
361 rate = clk_get_rate(clk->parent);
362
363 reg = __raw_readl(CCM_SPCTL0);
364
365 /* On TO2 we have to write the value back. Otherwise we
366 * read 0 from this register the next time.
367 */
368 if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
369 __raw_writel(reg, CCM_SPCTL0);
370
371 return mxc_decode_pll(reg, rate);
372 }
373
get_rate_cpu(struct clk * clk)374 static unsigned long get_rate_cpu(struct clk *clk)
375 {
376 u32 div;
377 unsigned long rate;
378
379 if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
380 div = (__raw_readl(CCM_CSCR) >> 12) & 0x3;
381 else
382 div = (__raw_readl(CCM_CSCR) >> 13) & 0x7;
383
384 rate = clk_get_rate(clk->parent);
385 return rate / (div + 1);
386 }
387
get_rate_ahb(struct clk * clk)388 static unsigned long get_rate_ahb(struct clk *clk)
389 {
390 unsigned long rate, bclk_pdf;
391
392 if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
393 bclk_pdf = (__raw_readl(CCM_CSCR) >> 8) & 0x3;
394 else
395 bclk_pdf = (__raw_readl(CCM_CSCR) >> 9) & 0xf;
396
397 rate = clk_get_rate(clk->parent);
398 return rate / (bclk_pdf + 1);
399 }
400
get_rate_ipg(struct clk * clk)401 static unsigned long get_rate_ipg(struct clk *clk)
402 {
403 unsigned long rate, ipg_pdf;
404
405 if (mx27_revision() >= IMX_CHIP_REVISION_2_0)
406 return clk_get_rate(clk->parent);
407 else
408 ipg_pdf = (__raw_readl(CCM_CSCR) >> 8) & 1;
409
410 rate = clk_get_rate(clk->parent);
411 return rate / (ipg_pdf + 1);
412 }
413
get_rate_per(struct clk * clk)414 static unsigned long get_rate_per(struct clk *clk)
415 {
416 unsigned long perclk_pdf, parent_rate;
417
418 parent_rate = clk_get_rate(clk->parent);
419
420 if (clk->id < 0 || clk->id > 3)
421 return 0;
422
423 perclk_pdf = (__raw_readl(CCM_PCDR1) >> (clk->id << 3)) & 0x3f;
424
425 return parent_rate / (perclk_pdf + 1);
426 }
427
428 /*
429 * the high frequency external clock reference
430 * Default case is 26MHz. Could be changed at runtime
431 * with a call to change_external_high_reference()
432 */
433 static struct clk ckih_clk = {
434 .get_rate = get_rate_high_reference,
435 };
436
437 static struct clk mpll_clk = {
438 .parent = &ckih_clk,
439 .get_rate = get_rate_mpll,
440 };
441
442 /* For i.MX27 TO2, it is the MPLL path 1 of ARM core
443 * It provides the clock source whose rate is same as MPLL
444 */
445 static struct clk mpll_main1_clk = {
446 .id = 0,
447 .parent = &mpll_clk,
448 .get_rate = get_rate_mpll_main,
449 };
450
451 /* For i.MX27 TO2, it is the MPLL path 2 of ARM core
452 * It provides the clock source whose rate is same MPLL * 2 / 3
453 */
454 static struct clk mpll_main2_clk = {
455 .id = 1,
456 .parent = &mpll_clk,
457 .get_rate = get_rate_mpll_main,
458 };
459
460 static struct clk ahb_clk = {
461 .parent = &mpll_main2_clk,
462 .get_rate = get_rate_ahb,
463 };
464
465 static struct clk ipg_clk = {
466 .parent = &ahb_clk,
467 .get_rate = get_rate_ipg,
468 };
469
470 static struct clk cpu_clk = {
471 .parent = &mpll_main2_clk,
472 .set_parent = clk_cpu_set_parent,
473 .round_rate = round_rate_cpu,
474 .get_rate = get_rate_cpu,
475 .set_rate = set_rate_cpu,
476 };
477
478 static struct clk spll_clk = {
479 .parent = &ckih_clk,
480 .get_rate = get_rate_spll,
481 .enable = clk_spll_enable,
482 .disable = clk_spll_disable,
483 };
484
485 /*
486 * the low frequency external clock reference
487 * Default case is 32.768kHz.
488 */
489 static struct clk ckil_clk = {
490 .get_rate = get_rate_low_reference,
491 };
492
493 /* Output of frequency pre multiplier */
494 static struct clk fpm_clk = {
495 .parent = &ckil_clk,
496 .get_rate = get_rate_fpm,
497 };
498
499 #define PCCR0 CCM_PCCR0
500 #define PCCR1 CCM_PCCR1
501
502 #define DEFINE_CLOCK(name, i, er, es, gr, s, p) \
503 static struct clk name = { \
504 .id = i, \
505 .enable_reg = er, \
506 .enable_shift = es, \
507 .get_rate = gr, \
508 .enable = clk_pccr_enable, \
509 .disable = clk_pccr_disable, \
510 .secondary = s, \
511 .parent = p, \
512 }
513
514 #define DEFINE_CLOCK1(name, i, er, es, getsetround, s, p) \
515 static struct clk name = { \
516 .id = i, \
517 .enable_reg = er, \
518 .enable_shift = es, \
519 .get_rate = get_rate_##getsetround, \
520 .set_rate = set_rate_##getsetround, \
521 .round_rate = round_rate_##getsetround, \
522 .enable = clk_pccr_enable, \
523 .disable = clk_pccr_disable, \
524 .secondary = s, \
525 .parent = p, \
526 }
527
528 /* Forward declaration to keep the following list in order */
529 static struct clk slcdc_clk1, sahara2_clk1, rtic_clk1, fec_clk1, emma_clk1,
530 dma_clk1, lcdc_clk2, vpu_clk1;
531
532 /* All clocks we can gate through PCCRx in the order of PCCRx bits */
533 DEFINE_CLOCK(ssi2_clk1, 1, PCCR0, 0, NULL, NULL, &ipg_clk);
534 DEFINE_CLOCK(ssi1_clk1, 0, PCCR0, 1, NULL, NULL, &ipg_clk);
535 DEFINE_CLOCK(slcdc_clk, 0, PCCR0, 2, NULL, &slcdc_clk1, &ahb_clk);
536 DEFINE_CLOCK(sdhc3_clk1, 0, PCCR0, 3, NULL, NULL, &ipg_clk);
537 DEFINE_CLOCK(sdhc2_clk1, 0, PCCR0, 4, NULL, NULL, &ipg_clk);
538 DEFINE_CLOCK(sdhc1_clk1, 0, PCCR0, 5, NULL, NULL, &ipg_clk);
539 DEFINE_CLOCK(scc_clk, 0, PCCR0, 6, NULL, NULL, &ipg_clk);
540 DEFINE_CLOCK(sahara2_clk, 0, PCCR0, 7, NULL, &sahara2_clk1, &ahb_clk);
541 DEFINE_CLOCK(rtic_clk, 0, PCCR0, 8, NULL, &rtic_clk1, &ahb_clk);
542 DEFINE_CLOCK(rtc_clk, 0, PCCR0, 9, NULL, NULL, &ipg_clk);
543 DEFINE_CLOCK(pwm_clk1, 0, PCCR0, 11, NULL, NULL, &ipg_clk);
544 DEFINE_CLOCK(owire_clk, 0, PCCR0, 12, NULL, NULL, &ipg_clk);
545 DEFINE_CLOCK(mstick_clk1, 0, PCCR0, 13, NULL, NULL, &ipg_clk);
546 DEFINE_CLOCK(lcdc_clk1, 0, PCCR0, 14, NULL, &lcdc_clk2, &ipg_clk);
547 DEFINE_CLOCK(kpp_clk, 0, PCCR0, 15, NULL, NULL, &ipg_clk);
548 DEFINE_CLOCK(iim_clk, 0, PCCR0, 16, NULL, NULL, &ipg_clk);
549 DEFINE_CLOCK(i2c2_clk, 1, PCCR0, 17, NULL, NULL, &ipg_clk);
550 DEFINE_CLOCK(i2c1_clk, 0, PCCR0, 18, NULL, NULL, &ipg_clk);
551 DEFINE_CLOCK(gpt6_clk1, 0, PCCR0, 29, NULL, NULL, &ipg_clk);
552 DEFINE_CLOCK(gpt5_clk1, 0, PCCR0, 20, NULL, NULL, &ipg_clk);
553 DEFINE_CLOCK(gpt4_clk1, 0, PCCR0, 21, NULL, NULL, &ipg_clk);
554 DEFINE_CLOCK(gpt3_clk1, 0, PCCR0, 22, NULL, NULL, &ipg_clk);
555 DEFINE_CLOCK(gpt2_clk1, 0, PCCR0, 23, NULL, NULL, &ipg_clk);
556 DEFINE_CLOCK(gpt1_clk1, 0, PCCR0, 24, NULL, NULL, &ipg_clk);
557 DEFINE_CLOCK(gpio_clk, 0, PCCR0, 25, NULL, NULL, &ipg_clk);
558 DEFINE_CLOCK(fec_clk, 0, PCCR0, 26, NULL, &fec_clk1, &ahb_clk);
559 DEFINE_CLOCK(emma_clk, 0, PCCR0, 27, NULL, &emma_clk1, &ahb_clk);
560 DEFINE_CLOCK(dma_clk, 0, PCCR0, 28, NULL, &dma_clk1, &ahb_clk);
561 DEFINE_CLOCK(cspi13_clk1, 0, PCCR0, 29, NULL, NULL, &ipg_clk);
562 DEFINE_CLOCK(cspi2_clk1, 0, PCCR0, 30, NULL, NULL, &ipg_clk);
563 DEFINE_CLOCK(cspi1_clk1, 0, PCCR0, 31, NULL, NULL, &ipg_clk);
564
565 DEFINE_CLOCK(mstick_clk, 0, PCCR1, 2, NULL, &mstick_clk1, &ipg_clk);
566 DEFINE_CLOCK(nfc_clk, 0, PCCR1, 3, get_rate_nfc, NULL, &cpu_clk);
567 DEFINE_CLOCK(ssi2_clk, 1, PCCR1, 4, get_rate_ssi2, &ssi2_clk1, &mpll_main2_clk);
568 DEFINE_CLOCK(ssi1_clk, 0, PCCR1, 5, get_rate_ssi1, &ssi1_clk1, &mpll_main2_clk);
569 DEFINE_CLOCK(vpu_clk, 0, PCCR1, 6, get_rate_vpu, &vpu_clk1, &mpll_main2_clk);
570 DEFINE_CLOCK1(per4_clk, 3, PCCR1, 7, per, NULL, &mpll_main2_clk);
571 DEFINE_CLOCK1(per3_clk, 2, PCCR1, 8, per, NULL, &mpll_main2_clk);
572 DEFINE_CLOCK1(per2_clk, 1, PCCR1, 9, per, NULL, &mpll_main2_clk);
573 DEFINE_CLOCK1(per1_clk, 0, PCCR1, 10, per, NULL, &mpll_main2_clk);
574 DEFINE_CLOCK(usb_clk1, 0, PCCR1, 11, NULL, NULL, &ahb_clk);
575 DEFINE_CLOCK(slcdc_clk1, 0, PCCR1, 12, NULL, NULL, &ahb_clk);
576 DEFINE_CLOCK(sahara2_clk1, 0, PCCR1, 13, NULL, NULL, &ahb_clk);
577 DEFINE_CLOCK(rtic_clk1, 0, PCCR1, 14, NULL, NULL, &ahb_clk);
578 DEFINE_CLOCK(lcdc_clk2, 0, PCCR1, 15, NULL, NULL, &ahb_clk);
579 DEFINE_CLOCK(vpu_clk1, 0, PCCR1, 16, NULL, NULL, &ahb_clk);
580 DEFINE_CLOCK(fec_clk1, 0, PCCR1, 17, NULL, NULL, &ahb_clk);
581 DEFINE_CLOCK(emma_clk1, 0, PCCR1, 18, NULL, NULL, &ahb_clk);
582 DEFINE_CLOCK(emi_clk, 0, PCCR1, 19, NULL, NULL, &ahb_clk);
583 DEFINE_CLOCK(dma_clk1, 0, PCCR1, 20, NULL, NULL, &ahb_clk);
584 DEFINE_CLOCK(csi_clk1, 0, PCCR1, 21, NULL, NULL, &ahb_clk);
585 DEFINE_CLOCK(brom_clk, 0, PCCR1, 22, NULL, NULL, &ahb_clk);
586 DEFINE_CLOCK(pata_clk, 0, PCCR1, 23, NULL, NULL, &ahb_clk);
587 DEFINE_CLOCK(wdog_clk, 0, PCCR1, 24, NULL, NULL, &ipg_clk);
588 DEFINE_CLOCK(usb_clk, 0, PCCR1, 25, get_rate_usb, &usb_clk1, &spll_clk);
589 DEFINE_CLOCK(uart6_clk1, 0, PCCR1, 26, NULL, NULL, &ipg_clk);
590 DEFINE_CLOCK(uart5_clk1, 0, PCCR1, 27, NULL, NULL, &ipg_clk);
591 DEFINE_CLOCK(uart4_clk1, 0, PCCR1, 28, NULL, NULL, &ipg_clk);
592 DEFINE_CLOCK(uart3_clk1, 0, PCCR1, 29, NULL, NULL, &ipg_clk);
593 DEFINE_CLOCK(uart2_clk1, 0, PCCR1, 30, NULL, NULL, &ipg_clk);
594 DEFINE_CLOCK(uart1_clk1, 0, PCCR1, 31, NULL, NULL, &ipg_clk);
595
596 /* Clocks we cannot directly gate, but drivers need their rates */
597 DEFINE_CLOCK(cspi1_clk, 0, NULL, 0, NULL, &cspi1_clk1, &per2_clk);
598 DEFINE_CLOCK(cspi2_clk, 1, NULL, 0, NULL, &cspi2_clk1, &per2_clk);
599 DEFINE_CLOCK(cspi3_clk, 2, NULL, 0, NULL, &cspi13_clk1, &per2_clk);
600 DEFINE_CLOCK(sdhc1_clk, 0, NULL, 0, NULL, &sdhc1_clk1, &per2_clk);
601 DEFINE_CLOCK(sdhc2_clk, 1, NULL, 0, NULL, &sdhc2_clk1, &per2_clk);
602 DEFINE_CLOCK(sdhc3_clk, 2, NULL, 0, NULL, &sdhc3_clk1, &per2_clk);
603 DEFINE_CLOCK(pwm_clk, 0, NULL, 0, NULL, &pwm_clk1, &per1_clk);
604 DEFINE_CLOCK(gpt1_clk, 0, NULL, 0, NULL, &gpt1_clk1, &per1_clk);
605 DEFINE_CLOCK(gpt2_clk, 1, NULL, 0, NULL, &gpt2_clk1, &per1_clk);
606 DEFINE_CLOCK(gpt3_clk, 2, NULL, 0, NULL, &gpt3_clk1, &per1_clk);
607 DEFINE_CLOCK(gpt4_clk, 3, NULL, 0, NULL, &gpt4_clk1, &per1_clk);
608 DEFINE_CLOCK(gpt5_clk, 4, NULL, 0, NULL, &gpt5_clk1, &per1_clk);
609 DEFINE_CLOCK(gpt6_clk, 5, NULL, 0, NULL, &gpt6_clk1, &per1_clk);
610 DEFINE_CLOCK(uart1_clk, 0, NULL, 0, NULL, &uart1_clk1, &per1_clk);
611 DEFINE_CLOCK(uart2_clk, 1, NULL, 0, NULL, &uart2_clk1, &per1_clk);
612 DEFINE_CLOCK(uart3_clk, 2, NULL, 0, NULL, &uart3_clk1, &per1_clk);
613 DEFINE_CLOCK(uart4_clk, 3, NULL, 0, NULL, &uart4_clk1, &per1_clk);
614 DEFINE_CLOCK(uart5_clk, 4, NULL, 0, NULL, &uart5_clk1, &per1_clk);
615 DEFINE_CLOCK(uart6_clk, 5, NULL, 0, NULL, &uart6_clk1, &per1_clk);
616 DEFINE_CLOCK1(lcdc_clk, 0, NULL, 0, parent, &lcdc_clk1, &per3_clk);
617 DEFINE_CLOCK1(csi_clk, 0, NULL, 0, parent, &csi_clk1, &per4_clk);
618
619 #define _REGISTER_CLOCK(d, n, c) \
620 { \
621 .dev_id = d, \
622 .con_id = n, \
623 .clk = &c, \
624 },
625
626 static struct clk_lookup lookups[] = {
627 /* i.mx27 has the i.mx21 type uart */
628 _REGISTER_CLOCK("imx21-uart.0", NULL, uart1_clk)
629 _REGISTER_CLOCK("imx21-uart.1", NULL, uart2_clk)
630 _REGISTER_CLOCK("imx21-uart.2", NULL, uart3_clk)
631 _REGISTER_CLOCK("imx21-uart.3", NULL, uart4_clk)
632 _REGISTER_CLOCK("imx21-uart.4", NULL, uart5_clk)
633 _REGISTER_CLOCK("imx21-uart.5", NULL, uart6_clk)
634 _REGISTER_CLOCK(NULL, "gpt1", gpt1_clk)
635 _REGISTER_CLOCK(NULL, "gpt2", gpt2_clk)
636 _REGISTER_CLOCK(NULL, "gpt3", gpt3_clk)
637 _REGISTER_CLOCK(NULL, "gpt4", gpt4_clk)
638 _REGISTER_CLOCK(NULL, "gpt5", gpt5_clk)
639 _REGISTER_CLOCK(NULL, "gpt6", gpt6_clk)
640 _REGISTER_CLOCK("mxc_pwm.0", NULL, pwm_clk)
641 _REGISTER_CLOCK("mxc-mmc.0", NULL, sdhc1_clk)
642 _REGISTER_CLOCK("mxc-mmc.1", NULL, sdhc2_clk)
643 _REGISTER_CLOCK("mxc-mmc.2", NULL, sdhc3_clk)
644 _REGISTER_CLOCK("imx27-cspi.0", NULL, cspi1_clk)
645 _REGISTER_CLOCK("imx27-cspi.1", NULL, cspi2_clk)
646 _REGISTER_CLOCK("imx27-cspi.2", NULL, cspi3_clk)
647 _REGISTER_CLOCK("imx-fb.0", NULL, lcdc_clk)
648 _REGISTER_CLOCK("mx2-camera.0", NULL, csi_clk)
649 _REGISTER_CLOCK("fsl-usb2-udc", "usb", usb_clk)
650 _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", usb_clk1)
651 _REGISTER_CLOCK("mxc-ehci.0", "usb", usb_clk)
652 _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", usb_clk1)
653 _REGISTER_CLOCK("mxc-ehci.1", "usb", usb_clk)
654 _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", usb_clk1)
655 _REGISTER_CLOCK("mxc-ehci.2", "usb", usb_clk)
656 _REGISTER_CLOCK("mxc-ehci.2", "usb_ahb", usb_clk1)
657 _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
658 _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
659 _REGISTER_CLOCK("mxc_nand.0", NULL, nfc_clk)
660 _REGISTER_CLOCK(NULL, "vpu", vpu_clk)
661 _REGISTER_CLOCK(NULL, "dma", dma_clk)
662 _REGISTER_CLOCK(NULL, "rtic", rtic_clk)
663 _REGISTER_CLOCK(NULL, "brom", brom_clk)
664 _REGISTER_CLOCK(NULL, "emma", emma_clk)
665 _REGISTER_CLOCK(NULL, "slcdc", slcdc_clk)
666 _REGISTER_CLOCK("imx27-fec.0", NULL, fec_clk)
667 _REGISTER_CLOCK(NULL, "emi", emi_clk)
668 _REGISTER_CLOCK(NULL, "sahara2", sahara2_clk)
669 _REGISTER_CLOCK("pata_imx", NULL, pata_clk)
670 _REGISTER_CLOCK(NULL, "mstick", mstick_clk)
671 _REGISTER_CLOCK("imx2-wdt.0", NULL, wdog_clk)
672 _REGISTER_CLOCK(NULL, "gpio", gpio_clk)
673 _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
674 _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
675 _REGISTER_CLOCK(NULL, "iim", iim_clk)
676 _REGISTER_CLOCK(NULL, "kpp", kpp_clk)
677 _REGISTER_CLOCK("mxc_w1.0", NULL, owire_clk)
678 _REGISTER_CLOCK(NULL, "rtc", rtc_clk)
679 _REGISTER_CLOCK(NULL, "scc", scc_clk)
680 };
681
682 /* Adjust the clock path for TO2 and later */
to2_adjust_clocks(void)683 static void __init to2_adjust_clocks(void)
684 {
685 unsigned long cscr = __raw_readl(CCM_CSCR);
686
687 if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
688 if (cscr & CCM_CSCR_ARM_SRC)
689 cpu_clk.parent = &mpll_main1_clk;
690
691 if (!(cscr & CCM_CSCR_SSI2))
692 ssi1_clk.parent = &spll_clk;
693
694 if (!(cscr & CCM_CSCR_SSI1))
695 ssi1_clk.parent = &spll_clk;
696
697 if (!(cscr & CCM_CSCR_VPU))
698 vpu_clk.parent = &spll_clk;
699 } else {
700 cpu_clk.parent = &mpll_clk;
701 cpu_clk.set_parent = NULL;
702 cpu_clk.round_rate = NULL;
703 cpu_clk.set_rate = NULL;
704 ahb_clk.parent = &mpll_clk;
705
706 per1_clk.parent = &mpll_clk;
707 per2_clk.parent = &mpll_clk;
708 per3_clk.parent = &mpll_clk;
709 per4_clk.parent = &mpll_clk;
710
711 ssi1_clk.parent = &mpll_clk;
712 ssi2_clk.parent = &mpll_clk;
713
714 vpu_clk.parent = &mpll_clk;
715 }
716 }
717
718 /*
719 * must be called very early to get information about the
720 * available clock rate when the timer framework starts
721 */
mx27_clocks_init(unsigned long fref)722 int __init mx27_clocks_init(unsigned long fref)
723 {
724 u32 cscr = __raw_readl(CCM_CSCR);
725
726 external_high_reference = fref;
727
728 /* detect clock reference for both system PLLs */
729 if (cscr & CCM_CSCR_MCU)
730 mpll_clk.parent = &ckih_clk;
731 else
732 mpll_clk.parent = &fpm_clk;
733
734 if (cscr & CCM_CSCR_SP)
735 spll_clk.parent = &ckih_clk;
736 else
737 spll_clk.parent = &fpm_clk;
738
739 to2_adjust_clocks();
740
741 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
742
743 /* Turn off all clocks we do not need */
744 __raw_writel(0, CCM_PCCR0);
745 __raw_writel((1 << 10) | (1 << 19), CCM_PCCR1);
746
747 spll_clk.disable(&spll_clk);
748
749 /* enable basic clocks */
750 clk_enable(&per1_clk);
751 clk_enable(&gpio_clk);
752 clk_enable(&emi_clk);
753 clk_enable(&iim_clk);
754 imx_print_silicon_rev("i.MX27", mx27_revision());
755 clk_disable(&iim_clk);
756
757 #if defined(CONFIG_DEBUG_LL) && !defined(CONFIG_DEBUG_ICEDCC)
758 clk_enable(&uart1_clk);
759 #endif
760
761 mxc_timer_init(&gpt1_clk, MX27_IO_ADDRESS(MX27_GPT1_BASE_ADDR),
762 MX27_INT_GPT1);
763
764 return 0;
765 }
766
767