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Merge remote-tracking branch 's5p/for-next'
[linux-2.6/next.git] / arch / arm / mach-s3c64xx / clock.c
blob8cf39e33579e3bb9c7d30eceb6afcaa5914e6d2c
1 /* linux/arch/arm/plat-s3c64xx/clock.c
2 *
3 * Copyright 2008 Openmoko, Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/
7 *
8 * S3C64XX Base clock support
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/ioport.h>
19 #include <linux/clk.h>
20 #include <linux/err.h>
21 #include <linux/io.h>
22
23 #include <mach/hardware.h>
24 #include <mach/map.h>
25
26 #include <mach/regs-sys.h>
27 #include <mach/regs-clock.h>
28 #include <mach/pll.h>
29
30 #include <plat/cpu.h>
31 #include <plat/devs.h>
32 #include <plat/cpu-freq.h>
33 #include <plat/clock.h>
34 #include <plat/clock-clksrc.h>
35
36 /* fin_apll, fin_mpll and fin_epll are all the same clock, which we call
37 * ext_xtal_mux for want of an actual name from the manual.
38 */
39
40 static struct clk clk_ext_xtal_mux = {
41 .name = "ext_xtal",
42 };
43
44 #define clk_fin_apll clk_ext_xtal_mux
45 #define clk_fin_mpll clk_ext_xtal_mux
46 #define clk_fin_epll clk_ext_xtal_mux
47
48 #define clk_fout_mpll clk_mpll
49 #define clk_fout_epll clk_epll
50
51 struct clk clk_h2 = {
52 .name = "hclk2",
53 .rate = 0,
54 };
55
56 struct clk clk_27m = {
57 .name = "clk_27m",
58 .rate = 27000000,
59 };
60
61 static int clk_48m_ctrl(struct clk *clk, int enable)
62 {
63 unsigned long flags;
64 u32 val;
65
66 /* can't rely on clock lock, this register has other usages */
67 local_irq_save(flags);
68
69 val = __raw_readl(S3C64XX_OTHERS);
70 if (enable)
71 val |= S3C64XX_OTHERS_USBMASK;
72 else
73 val &= ~S3C64XX_OTHERS_USBMASK;
74
75 __raw_writel(val, S3C64XX_OTHERS);
76 local_irq_restore(flags);
77
78 return 0;
79 }
80
81 struct clk clk_48m = {
82 .name = "clk_48m",
83 .rate = 48000000,
84 .enable = clk_48m_ctrl,
85 };
86
87 struct clk clk_xusbxti = {
88 .name = "xusbxti",
89 .rate = 48000000,
90 };
91
92 static int inline s3c64xx_gate(void __iomem *reg,
93 struct clk *clk,
94 int enable)
95 {
96 unsigned int ctrlbit = clk->ctrlbit;
97 u32 con;
98
99 con = __raw_readl(reg);
100
101 if (enable)
102 con |= ctrlbit;
103 else
104 con &= ~ctrlbit;
105
106 __raw_writel(con, reg);
107 return 0;
108 }
109
110 static int s3c64xx_pclk_ctrl(struct clk *clk, int enable)
111 {
112 return s3c64xx_gate(S3C_PCLK_GATE, clk, enable);
113 }
114
115 static int s3c64xx_hclk_ctrl(struct clk *clk, int enable)
116 {
117 return s3c64xx_gate(S3C_HCLK_GATE, clk, enable);
118 }
119
120 int s3c64xx_sclk_ctrl(struct clk *clk, int enable)
121 {
122 return s3c64xx_gate(S3C_SCLK_GATE, clk, enable);
123 }
124
125 static struct clk init_clocks_off[] = {
126 {
127 .name = "nand",
128 .parent = &clk_h,
129 }, {
130 .name = "rtc",
131 .parent = &clk_p,
132 .enable = s3c64xx_pclk_ctrl,
133 .ctrlbit = S3C_CLKCON_PCLK_RTC,
134 }, {
135 .name = "adc",
136 .parent = &clk_p,
137 .enable = s3c64xx_pclk_ctrl,
138 .ctrlbit = S3C_CLKCON_PCLK_TSADC,
139 }, {
140 .name = "i2c",
141 .parent = &clk_p,
142 .enable = s3c64xx_pclk_ctrl,
143 .ctrlbit = S3C_CLKCON_PCLK_IIC,
144 }, {
145 .name = "i2c",
146 .devname = "s3c2440-i2c.1",
147 .parent = &clk_p,
148 .enable = s3c64xx_pclk_ctrl,
149 .ctrlbit = S3C6410_CLKCON_PCLK_I2C1,
150 }, {
151 .name = "iis",
152 .devname = "samsung-i2s.0",
153 .parent = &clk_p,
154 .enable = s3c64xx_pclk_ctrl,
155 .ctrlbit = S3C_CLKCON_PCLK_IIS0,
156 }, {
157 .name = "iis",
158 .devname = "samsung-i2s.1",
159 .parent = &clk_p,
160 .enable = s3c64xx_pclk_ctrl,
161 .ctrlbit = S3C_CLKCON_PCLK_IIS1,
162 }, {
163 #ifdef CONFIG_CPU_S3C6410
164 .name = "iis",
165 .parent = &clk_p,
166 .enable = s3c64xx_pclk_ctrl,
167 .ctrlbit = S3C6410_CLKCON_PCLK_IIS2,
168 }, {
169 #endif
170 .name = "keypad",
171 .parent = &clk_p,
172 .enable = s3c64xx_pclk_ctrl,
173 .ctrlbit = S3C_CLKCON_PCLK_KEYPAD,
174 }, {
175 .name = "spi",
176 .devname = "s3c64xx-spi.0",
177 .parent = &clk_p,
178 .enable = s3c64xx_pclk_ctrl,
179 .ctrlbit = S3C_CLKCON_PCLK_SPI0,
180 }, {
181 .name = "spi",
182 .devname = "s3c64xx-spi.1",
183 .parent = &clk_p,
184 .enable = s3c64xx_pclk_ctrl,
185 .ctrlbit = S3C_CLKCON_PCLK_SPI1,
186 }, {
187 .name = "spi_48m",
188 .devname = "s3c64xx-spi.0",
189 .parent = &clk_48m,
190 .enable = s3c64xx_sclk_ctrl,
191 .ctrlbit = S3C_CLKCON_SCLK_SPI0_48,
192 }, {
193 .name = "spi_48m",
194 .devname = "s3c64xx-spi.1",
195 .parent = &clk_48m,
196 .enable = s3c64xx_sclk_ctrl,
197 .ctrlbit = S3C_CLKCON_SCLK_SPI1_48,
198 }, {
199 .name = "48m",
200 .devname = "s3c-sdhci.0",
201 .parent = &clk_48m,
202 .enable = s3c64xx_sclk_ctrl,
203 .ctrlbit = S3C_CLKCON_SCLK_MMC0_48,
204 }, {
205 .name = "48m",
206 .devname = "s3c-sdhci.1",
207 .parent = &clk_48m,
208 .enable = s3c64xx_sclk_ctrl,
209 .ctrlbit = S3C_CLKCON_SCLK_MMC1_48,
210 }, {
211 .name = "48m",
212 .devname = "s3c-sdhci.2",
213 .parent = &clk_48m,
214 .enable = s3c64xx_sclk_ctrl,
215 .ctrlbit = S3C_CLKCON_SCLK_MMC2_48,
216 }, {
217 .name = "dma0",
218 .parent = &clk_h,
219 .enable = s3c64xx_hclk_ctrl,
220 .ctrlbit = S3C_CLKCON_HCLK_DMA0,
221 }, {
222 .name = "dma1",
223 .parent = &clk_h,
224 .enable = s3c64xx_hclk_ctrl,
225 .ctrlbit = S3C_CLKCON_HCLK_DMA1,
226 },
227 };
228
229 static struct clk init_clocks[] = {
230 {
231 .name = "lcd",
232 .parent = &clk_h,
233 .enable = s3c64xx_hclk_ctrl,
234 .ctrlbit = S3C_CLKCON_HCLK_LCD,
235 }, {
236 .name = "gpio",
237 .parent = &clk_p,
238 .enable = s3c64xx_pclk_ctrl,
239 .ctrlbit = S3C_CLKCON_PCLK_GPIO,
240 }, {
241 .name = "usb-host",
242 .parent = &clk_h,
243 .enable = s3c64xx_hclk_ctrl,
244 .ctrlbit = S3C_CLKCON_HCLK_UHOST,
245 }, {
246 .name = "hsmmc",
247 .devname = "s3c-sdhci.0",
248 .parent = &clk_h,
249 .enable = s3c64xx_hclk_ctrl,
250 .ctrlbit = S3C_CLKCON_HCLK_HSMMC0,
251 }, {
252 .name = "hsmmc",
253 .devname = "s3c-sdhci.1",
254 .parent = &clk_h,
255 .enable = s3c64xx_hclk_ctrl,
256 .ctrlbit = S3C_CLKCON_HCLK_HSMMC1,
257 }, {
258 .name = "hsmmc",
259 .devname = "s3c-sdhci.2",
260 .parent = &clk_h,
261 .enable = s3c64xx_hclk_ctrl,
262 .ctrlbit = S3C_CLKCON_HCLK_HSMMC2,
263 }, {
264 .name = "otg",
265 .parent = &clk_h,
266 .enable = s3c64xx_hclk_ctrl,
267 .ctrlbit = S3C_CLKCON_HCLK_USB,
268 }, {
269 .name = "timers",
270 .parent = &clk_p,
271 .enable = s3c64xx_pclk_ctrl,
272 .ctrlbit = S3C_CLKCON_PCLK_PWM,
273 }, {
274 .name = "uart",
275 .devname = "s3c6400-uart.0",
276 .parent = &clk_p,
277 .enable = s3c64xx_pclk_ctrl,
278 .ctrlbit = S3C_CLKCON_PCLK_UART0,
279 }, {
280 .name = "uart",
281 .devname = "s3c6400-uart.1",
282 .parent = &clk_p,
283 .enable = s3c64xx_pclk_ctrl,
284 .ctrlbit = S3C_CLKCON_PCLK_UART1,
285 }, {
286 .name = "uart",
287 .devname = "s3c6400-uart.2",
288 .parent = &clk_p,
289 .enable = s3c64xx_pclk_ctrl,
290 .ctrlbit = S3C_CLKCON_PCLK_UART2,
291 }, {
292 .name = "uart",
293 .devname = "s3c6400-uart.3",
294 .parent = &clk_p,
295 .enable = s3c64xx_pclk_ctrl,
296 .ctrlbit = S3C_CLKCON_PCLK_UART3,
297 }, {
298 .name = "watchdog",
299 .parent = &clk_p,
300 .ctrlbit = S3C_CLKCON_PCLK_WDT,
301 }, {
302 .name = "ac97",
303 .parent = &clk_p,
304 .ctrlbit = S3C_CLKCON_PCLK_AC97,
305 }, {
306 .name = "cfcon",
307 .parent = &clk_h,
308 .enable = s3c64xx_hclk_ctrl,
309 .ctrlbit = S3C_CLKCON_HCLK_IHOST,
310 }
311 };
312
313
314 static struct clk clk_fout_apll = {
315 .name = "fout_apll",
316 };
317
318 static struct clk *clk_src_apll_list[] = {
319 [0] = &clk_fin_apll,
320 [1] = &clk_fout_apll,
321 };
322
323 static struct clksrc_sources clk_src_apll = {
324 .sources = clk_src_apll_list,
325 .nr_sources = ARRAY_SIZE(clk_src_apll_list),
326 };
327
328 static struct clksrc_clk clk_mout_apll = {
329 .clk = {
330 .name = "mout_apll",
331 },
332 .reg_src = { .reg = S3C_CLK_SRC, .shift = 0, .size = 1 },
333 .sources = &clk_src_apll,
334 };
335
336 static struct clk *clk_src_epll_list[] = {
337 [0] = &clk_fin_epll,
338 [1] = &clk_fout_epll,
339 };
340
341 static struct clksrc_sources clk_src_epll = {
342 .sources = clk_src_epll_list,
343 .nr_sources = ARRAY_SIZE(clk_src_epll_list),
344 };
345
346 static struct clksrc_clk clk_mout_epll = {
347 .clk = {
348 .name = "mout_epll",
349 },
350 .reg_src = { .reg = S3C_CLK_SRC, .shift = 2, .size = 1 },
351 .sources = &clk_src_epll,
352 };
353
354 static struct clk *clk_src_mpll_list[] = {
355 [0] = &clk_fin_mpll,
356 [1] = &clk_fout_mpll,
357 };
358
359 static struct clksrc_sources clk_src_mpll = {
360 .sources = clk_src_mpll_list,
361 .nr_sources = ARRAY_SIZE(clk_src_mpll_list),
362 };
363
364 static struct clksrc_clk clk_mout_mpll = {
365 .clk = {
366 .name = "mout_mpll",
367 },
368 .reg_src = { .reg = S3C_CLK_SRC, .shift = 1, .size = 1 },
369 .sources = &clk_src_mpll,
370 };
371
372 static unsigned int armclk_mask;
373
374 static unsigned long s3c64xx_clk_arm_get_rate(struct clk *clk)
375 {
376 unsigned long rate = clk_get_rate(clk->parent);
377 u32 clkdiv;
378
379 /* divisor mask starts at bit0, so no need to shift */
380 clkdiv = __raw_readl(S3C_CLK_DIV0) & armclk_mask;
381
382 return rate / (clkdiv + 1);
383 }
384
385 static unsigned long s3c64xx_clk_arm_round_rate(struct clk *clk,
386 unsigned long rate)
387 {
388 unsigned long parent = clk_get_rate(clk->parent);
389 u32 div;
390
391 if (parent < rate)
392 return parent;
393
394 div = (parent / rate) - 1;
395 if (div > armclk_mask)
396 div = armclk_mask;
397
398 return parent / (div + 1);
399 }
400
401 static int s3c64xx_clk_arm_set_rate(struct clk *clk, unsigned long rate)
402 {
403 unsigned long parent = clk_get_rate(clk->parent);
404 u32 div;
405 u32 val;
406
407 if (rate < parent / (armclk_mask + 1))
408 return -EINVAL;
409
410 rate = clk_round_rate(clk, rate);
411 div = clk_get_rate(clk->parent) / rate;
412
413 val = __raw_readl(S3C_CLK_DIV0);
414 val &= ~armclk_mask;
415 val |= (div - 1);
416 __raw_writel(val, S3C_CLK_DIV0);
417
418 return 0;
419
420 }
421
422 static struct clk clk_arm = {
423 .name = "armclk",
424 .parent = &clk_mout_apll.clk,
425 .ops = &(struct clk_ops) {
426 .get_rate = s3c64xx_clk_arm_get_rate,
427 .set_rate = s3c64xx_clk_arm_set_rate,
428 .round_rate = s3c64xx_clk_arm_round_rate,
429 },
430 };
431
432 static unsigned long s3c64xx_clk_doutmpll_get_rate(struct clk *clk)
433 {
434 unsigned long rate = clk_get_rate(clk->parent);
435
436 printk(KERN_DEBUG "%s: parent is %ld\n", __func__, rate);
437
438 if (__raw_readl(S3C_CLK_DIV0) & S3C6400_CLKDIV0_MPLL_MASK)
439 rate /= 2;
440
441 return rate;
442 }
443
444 static struct clk_ops clk_dout_ops = {
445 .get_rate = s3c64xx_clk_doutmpll_get_rate,
446 };
447
448 static struct clk clk_dout_mpll = {
449 .name = "dout_mpll",
450 .parent = &clk_mout_mpll.clk,
451 .ops = &clk_dout_ops,
452 };
453
454 static struct clk *clkset_spi_mmc_list[] = {
455 &clk_mout_epll.clk,
456 &clk_dout_mpll,
457 &clk_fin_epll,
458 &clk_27m,
459 };
460
461 static struct clksrc_sources clkset_spi_mmc = {
462 .sources = clkset_spi_mmc_list,
463 .nr_sources = ARRAY_SIZE(clkset_spi_mmc_list),
464 };
465
466 static struct clk *clkset_irda_list[] = {
467 &clk_mout_epll.clk,
468 &clk_dout_mpll,
469 NULL,
470 &clk_27m,
471 };
472
473 static struct clksrc_sources clkset_irda = {
474 .sources = clkset_irda_list,
475 .nr_sources = ARRAY_SIZE(clkset_irda_list),
476 };
477
478 static struct clk *clkset_uart_list[] = {
479 &clk_mout_epll.clk,
480 &clk_dout_mpll,
481 NULL,
482 NULL
483 };
484
485 static struct clksrc_sources clkset_uart = {
486 .sources = clkset_uart_list,
487 .nr_sources = ARRAY_SIZE(clkset_uart_list),
488 };
489
490 static struct clk *clkset_uhost_list[] = {
491 &clk_48m,
492 &clk_mout_epll.clk,
493 &clk_dout_mpll,
494 &clk_fin_epll,
495 };
496
497 static struct clksrc_sources clkset_uhost = {
498 .sources = clkset_uhost_list,
499 .nr_sources = ARRAY_SIZE(clkset_uhost_list),
500 };
501
502 /* The peripheral clocks are all controlled via clocksource followed
503 * by an optional divider and gate stage. We currently roll this into
504 * one clock which hides the intermediate clock from the mux.
505 *
506 * Note, the JPEG clock can only be an even divider...
507 *
508 * The scaler and LCD clocks depend on the S3C64XX version, and also
509 * have a common parent divisor so are not included here.
510 */
511
512 /* clocks that feed other parts of the clock source tree */
513
514 static struct clk clk_iis_cd0 = {
515 .name = "iis_cdclk0",
516 };
517
518 static struct clk clk_iis_cd1 = {
519 .name = "iis_cdclk1",
520 };
521
522 static struct clk clk_iisv4_cd = {
523 .name = "iis_cdclk_v4",
524 };
525
526 static struct clk clk_pcm_cd = {
527 .name = "pcm_cdclk",
528 };
529
530 static struct clk *clkset_audio0_list[] = {
531 [0] = &clk_mout_epll.clk,
532 [1] = &clk_dout_mpll,
533 [2] = &clk_fin_epll,
534 [3] = &clk_iis_cd0,
535 [4] = &clk_pcm_cd,
536 };
537
538 static struct clksrc_sources clkset_audio0 = {
539 .sources = clkset_audio0_list,
540 .nr_sources = ARRAY_SIZE(clkset_audio0_list),
541 };
542
543 static struct clk *clkset_audio1_list[] = {
544 [0] = &clk_mout_epll.clk,
545 [1] = &clk_dout_mpll,
546 [2] = &clk_fin_epll,
547 [3] = &clk_iis_cd1,
548 [4] = &clk_pcm_cd,
549 };
550
551 static struct clksrc_sources clkset_audio1 = {
552 .sources = clkset_audio1_list,
553 .nr_sources = ARRAY_SIZE(clkset_audio1_list),
554 };
555
556 static struct clk *clkset_audio2_list[] = {
557 [0] = &clk_mout_epll.clk,
558 [1] = &clk_dout_mpll,
559 [2] = &clk_fin_epll,
560 [3] = &clk_iisv4_cd,
561 [4] = &clk_pcm_cd,
562 };
563
564 static struct clksrc_sources clkset_audio2 = {
565 .sources = clkset_audio2_list,
566 .nr_sources = ARRAY_SIZE(clkset_audio2_list),
567 };
568
569 static struct clk *clkset_camif_list[] = {
570 &clk_h2,
571 };
572
573 static struct clksrc_sources clkset_camif = {
574 .sources = clkset_camif_list,
575 .nr_sources = ARRAY_SIZE(clkset_camif_list),
576 };
577
578 static struct clksrc_clk clksrcs[] = {
579 {
580 .clk = {
581 .name = "mmc_bus",
582 .devname = "s3c-sdhci.0",
583 .ctrlbit = S3C_CLKCON_SCLK_MMC0,
584 .enable = s3c64xx_sclk_ctrl,
585 },
586 .reg_src = { .reg = S3C_CLK_SRC, .shift = 18, .size = 2 },
587 .reg_div = { .reg = S3C_CLK_DIV1, .shift = 0, .size = 4 },
588 .sources = &clkset_spi_mmc,
589 }, {
590 .clk = {
591 .name = "mmc_bus",
592 .devname = "s3c-sdhci.1",
593 .ctrlbit = S3C_CLKCON_SCLK_MMC1,
594 .enable = s3c64xx_sclk_ctrl,
595 },
596 .reg_src = { .reg = S3C_CLK_SRC, .shift = 20, .size = 2 },
597 .reg_div = { .reg = S3C_CLK_DIV1, .shift = 4, .size = 4 },
598 .sources = &clkset_spi_mmc,
599 }, {
600 .clk = {
601 .name = "mmc_bus",
602 .devname = "s3c-sdhci.2",
603 .ctrlbit = S3C_CLKCON_SCLK_MMC2,
604 .enable = s3c64xx_sclk_ctrl,
605 },
606 .reg_src = { .reg = S3C_CLK_SRC, .shift = 22, .size = 2 },
607 .reg_div = { .reg = S3C_CLK_DIV1, .shift = 8, .size = 4 },
608 .sources = &clkset_spi_mmc,
609 }, {
610 .clk = {
611 .name = "usb-bus-host",
612 .ctrlbit = S3C_CLKCON_SCLK_UHOST,
613 .enable = s3c64xx_sclk_ctrl,
614 },
615 .reg_src = { .reg = S3C_CLK_SRC, .shift = 5, .size = 2 },
616 .reg_div = { .reg = S3C_CLK_DIV1, .shift = 20, .size = 4 },
617 .sources = &clkset_uhost,
618 }, {
619 .clk = {
620 .name = "uclk1",
621 .ctrlbit = S3C_CLKCON_SCLK_UART,
622 .enable = s3c64xx_sclk_ctrl,
623 },
624 .reg_src = { .reg = S3C_CLK_SRC, .shift = 13, .size = 1 },
625 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 16, .size = 4 },
626 .sources = &clkset_uart,
627 }, {
628 /* Where does UCLK0 come from? */
629 .clk = {
630 .name = "spi-bus",
631 .devname = "s3c64xx-spi.0",
632 .ctrlbit = S3C_CLKCON_SCLK_SPI0,
633 .enable = s3c64xx_sclk_ctrl,
634 },
635 .reg_src = { .reg = S3C_CLK_SRC, .shift = 14, .size = 2 },
636 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 0, .size = 4 },
637 .sources = &clkset_spi_mmc,
638 }, {
639 .clk = {
640 .name = "spi-bus",
641 .devname = "s3c64xx-spi.1",
642 .enable = s3c64xx_sclk_ctrl,
643 },
644 .reg_src = { .reg = S3C_CLK_SRC, .shift = 16, .size = 2 },
645 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 4, .size = 4 },
646 .sources = &clkset_spi_mmc,
647 }, {
648 .clk = {
649 .name = "audio-bus",
650 .devname = "samsung-i2s.0",
651 .ctrlbit = S3C_CLKCON_SCLK_AUDIO0,
652 .enable = s3c64xx_sclk_ctrl,
653 },
654 .reg_src = { .reg = S3C_CLK_SRC, .shift = 7, .size = 3 },
655 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 8, .size = 4 },
656 .sources = &clkset_audio0,
657 }, {
658 .clk = {
659 .name = "audio-bus",
660 .devname = "samsung-i2s.1",
661 .ctrlbit = S3C_CLKCON_SCLK_AUDIO1,
662 .enable = s3c64xx_sclk_ctrl,
663 },
664 .reg_src = { .reg = S3C_CLK_SRC, .shift = 10, .size = 3 },
665 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 12, .size = 4 },
666 .sources = &clkset_audio1,
667 }, {
668 .clk = {
669 .name = "audio-bus",
670 .devname = "samsung-i2s.2",
671 .ctrlbit = S3C6410_CLKCON_SCLK_AUDIO2,
672 .enable = s3c64xx_sclk_ctrl,
673 },
674 .reg_src = { .reg = S3C6410_CLK_SRC2, .shift = 0, .size = 3 },
675 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 24, .size = 4 },
676 .sources = &clkset_audio2,
677 }, {
678 .clk = {
679 .name = "irda-bus",
680 .ctrlbit = S3C_CLKCON_SCLK_IRDA,
681 .enable = s3c64xx_sclk_ctrl,
682 },
683 .reg_src = { .reg = S3C_CLK_SRC, .shift = 24, .size = 2 },
684 .reg_div = { .reg = S3C_CLK_DIV2, .shift = 20, .size = 4 },
685 .sources = &clkset_irda,
686 }, {
687 .clk = {
688 .name = "camera",
689 .ctrlbit = S3C_CLKCON_SCLK_CAM,
690 .enable = s3c64xx_sclk_ctrl,
691 },
692 .reg_div = { .reg = S3C_CLK_DIV0, .shift = 20, .size = 4 },
693 .reg_src = { .reg = NULL, .shift = 0, .size = 0 },
694 .sources = &clkset_camif,
695 },
696 };
697
698 /* Clock initialisation code */
699
700 static struct clksrc_clk *init_parents[] = {
701 &clk_mout_apll,
702 &clk_mout_epll,
703 &clk_mout_mpll,
704 };
705
706 #define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
707
708 void __init_or_cpufreq s3c6400_setup_clocks(void)
709 {
710 struct clk *xtal_clk;
711 unsigned long xtal;
712 unsigned long fclk;
713 unsigned long hclk;
714 unsigned long hclk2;
715 unsigned long pclk;
716 unsigned long epll;
717 unsigned long apll;
718 unsigned long mpll;
719 unsigned int ptr;
720 u32 clkdiv0;
721
722 printk(KERN_DEBUG "%s: registering clocks\n", __func__);
723
724 clkdiv0 = __raw_readl(S3C_CLK_DIV0);
725 printk(KERN_DEBUG "%s: clkdiv0 = %08x\n", __func__, clkdiv0);
726
727 xtal_clk = clk_get(NULL, "xtal");
728 BUG_ON(IS_ERR(xtal_clk));
729
730 xtal = clk_get_rate(xtal_clk);
731 clk_put(xtal_clk);
732
733 printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
734
735 /* For now assume the mux always selects the crystal */
736 clk_ext_xtal_mux.parent = xtal_clk;
737
738 epll = s3c6400_get_epll(xtal);
739 mpll = s3c6400_get_pll(xtal, __raw_readl(S3C_MPLL_CON));
740 apll = s3c6400_get_pll(xtal, __raw_readl(S3C_APLL_CON));
741
742 fclk = mpll;
743
744 printk(KERN_INFO "S3C64XX: PLL settings, A=%ld, M=%ld, E=%ld\n",
745 apll, mpll, epll);
746
747 hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
748 hclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK);
749 pclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_PCLK);
750
751 printk(KERN_INFO "S3C64XX: HCLK2=%ld, HCLK=%ld, PCLK=%ld\n",
752 hclk2, hclk, pclk);
753
754 clk_fout_mpll.rate = mpll;
755 clk_fout_epll.rate = epll;
756 clk_fout_apll.rate = apll;
757
758 clk_h2.rate = hclk2;
759 clk_h.rate = hclk;
760 clk_p.rate = pclk;
761 clk_f.rate = fclk;
762
763 for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
764 s3c_set_clksrc(init_parents[ptr], true);
765
766 for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
767 s3c_set_clksrc(&clksrcs[ptr], true);
768 }
769
770 static struct clk *clks1[] __initdata = {
771 &clk_ext_xtal_mux,
772 &clk_iis_cd0,
773 &clk_iis_cd1,
774 &clk_iisv4_cd,
775 &clk_pcm_cd,
776 &clk_mout_epll.clk,
777 &clk_mout_mpll.clk,
778 &clk_dout_mpll,
779 &clk_arm,
780 };
781
782 static struct clk *clks[] __initdata = {
783 &clk_ext,
784 &clk_epll,
785 &clk_27m,
786 &clk_48m,
787 &clk_h2,
788 &clk_xusbxti,
789 };
790
791 /**
792 * s3c64xx_register_clocks - register clocks for s3c6400 and s3c6410
793 * @xtal: The rate for the clock crystal feeding the PLLs.
794 * @armclk_divlimit: Divisor mask for ARMCLK.
795 *
796 * Register the clocks for the S3C6400 and S3C6410 SoC range, such
797 * as ARMCLK as well as the necessary parent clocks.
798 *
799 * This call does not setup the clocks, which is left to the
800 * s3c6400_setup_clocks() call which may be needed by the cpufreq
801 * or resume code to re-set the clocks if the bootloader has changed
802 * them.
803 */
804 void __init s3c64xx_register_clocks(unsigned long xtal,
805 unsigned armclk_divlimit)
806 {
807 armclk_mask = armclk_divlimit;
808
809 s3c24xx_register_baseclocks(xtal);
810 s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
811
812 s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
813
814 s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
815 s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
816
817 s3c24xx_register_clocks(clks1, ARRAY_SIZE(clks1));
818 s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
819 s3c_pwmclk_init();
820 }
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