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gerrit.cesnet.cz / github / trini / u-boot / 057772b7618321ef5a2d48318d2ded758015cc1a / . / arch / arm / mach-tegra / tegra124 / clock.c
blob: b9558484b0709ed6098af8f504737d79f8bc6dfa [file] [log] [blame]
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]1/*
2 * (C) Copyright 2013
3 * NVIDIA Corporation <www.nvidia.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8/* Tegra124 Clock control functions */
9
10#include <common.h>
11#include <asm/io.h>
12#include <asm/arch/clock.h>
13#include <asm/arch/sysctr.h>
14#include <asm/arch/tegra.h>
15#include <asm/arch-tegra/clk_rst.h>
16#include <asm/arch-tegra/timer.h>
17#include <div64.h>
18#include <fdtdec.h>
19
20/*
21 * Clock types that we can use as a source. The Tegra124 has muxes for the
22 * peripheral clocks, and in most cases there are four options for the clock
23 * source. This gives us a clock 'type' and exploits what commonality exists
24 * in the device.
25 *
26 * Letters are obvious, except for T which means CLK_M, and S which means the
27 * clock derived from 32KHz. Beware that CLK_M (also called OSC in the
28 * datasheet) and PLL_M are different things. The former is the basic
29 * clock supplied to the SOC from an external oscillator. The latter is the
30 * memory clock PLL.
31 *
32 * See definitions in clock_id in the header file.
33 */
34enum clock_type_id {
35 CLOCK_TYPE_AXPT, /* PLL_A, PLL_X, PLL_P, CLK_M */
36 CLOCK_TYPE_MCPA, /* and so on */
37 CLOCK_TYPE_MCPT,
38 CLOCK_TYPE_PCM,
39 CLOCK_TYPE_PCMT,
40 CLOCK_TYPE_PDCT,
41 CLOCK_TYPE_ACPT,
42 CLOCK_TYPE_ASPTE,
43 CLOCK_TYPE_PMDACD2T,
44 CLOCK_TYPE_PCST,
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]45 CLOCK_TYPE_DP,
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]46
47 CLOCK_TYPE_PC2CC3M,
48 CLOCK_TYPE_PC2CC3S_T,
49 CLOCK_TYPE_PC2CC3M_T,
50 CLOCK_TYPE_PC2CC3M_T16, /* PC2CC3M_T, but w/16-bit divisor (I2C) */
51 CLOCK_TYPE_MC2CC3P_A,
52 CLOCK_TYPE_M,
53 CLOCK_TYPE_MCPTM2C2C3,
54 CLOCK_TYPE_PC2CC3T_S,
55 CLOCK_TYPE_AC2CC3P_TS2,
56
57 CLOCK_TYPE_COUNT,
58 CLOCK_TYPE_NONE = -1, /* invalid clock type */
59};
60
61enum {
62 CLOCK_MAX_MUX = 8 /* number of source options for each clock */
63};
64
65/*
66 * Clock source mux for each clock type. This just converts our enum into
67 * a list of mux sources for use by the code.
68 *
69 * Note:
70 * The extra column in each clock source array is used to store the mask
71 * bits in its register for the source.
72 */
73#define CLK(x) CLOCK_ID_ ## x
74static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX+1] = {
75 { CLK(AUDIO), CLK(XCPU), CLK(PERIPH), CLK(OSC),
76 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
77 MASK_BITS_31_30},
78 { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(AUDIO),
79 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
80 MASK_BITS_31_30},
81 { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
82 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
83 MASK_BITS_31_30},
84 { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(NONE),
85 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
86 MASK_BITS_31_30},
87 { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC),
88 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
89 MASK_BITS_31_30},
90 { CLK(PERIPH), CLK(DISPLAY), CLK(CGENERAL), CLK(OSC),
91 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
92 MASK_BITS_31_30},
93 { CLK(AUDIO), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
94 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
95 MASK_BITS_31_30},
96 { CLK(AUDIO), CLK(SFROM32KHZ), CLK(PERIPH), CLK(OSC),
97 CLK(EPCI), CLK(NONE), CLK(NONE), CLK(NONE),
98 MASK_BITS_31_29},
99 { CLK(PERIPH), CLK(MEMORY), CLK(DISPLAY), CLK(AUDIO),
100 CLK(CGENERAL), CLK(DISPLAY2), CLK(OSC), CLK(NONE),
101 MASK_BITS_31_29},
102 { CLK(PERIPH), CLK(CGENERAL), CLK(SFROM32KHZ), CLK(OSC),
103 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
104 MASK_BITS_31_28},
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]105 /* CLOCK_TYPE_DP */
106 { CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
107 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
108 MASK_BITS_31_28},
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]109
110 /* Additional clock types on Tegra114+ */
111 /* CLOCK_TYPE_PC2CC3M */
112 { CLK(PERIPH), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
113 CLK(MEMORY), CLK(NONE), CLK(NONE), CLK(NONE),
114 MASK_BITS_31_29},
115 /* CLOCK_TYPE_PC2CC3S_T */
116 { CLK(PERIPH), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
117 CLK(SFROM32KHZ), CLK(NONE), CLK(OSC), CLK(NONE),
118 MASK_BITS_31_29},
119 /* CLOCK_TYPE_PC2CC3M_T */
120 { CLK(PERIPH), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
121 CLK(MEMORY), CLK(NONE), CLK(OSC), CLK(NONE),
122 MASK_BITS_31_29},
123 /* CLOCK_TYPE_PC2CC3M_T, w/16-bit divisor (I2C) */
124 { CLK(PERIPH), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
125 CLK(MEMORY), CLK(NONE), CLK(OSC), CLK(NONE),
126 MASK_BITS_31_29},
127 /* CLOCK_TYPE_MC2CC3P_A */
128 { CLK(MEMORY), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
129 CLK(PERIPH), CLK(NONE), CLK(AUDIO), CLK(NONE),
130 MASK_BITS_31_29},
131 /* CLOCK_TYPE_M */
132 { CLK(MEMORY), CLK(NONE), CLK(NONE), CLK(NONE),
133 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
134 MASK_BITS_31_30},
135 /* CLOCK_TYPE_MCPTM2C2C3 */
136 { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
137 CLK(MEMORY2), CLK(CGENERAL2), CLK(CGENERAL3), CLK(NONE),
138 MASK_BITS_31_29},
139 /* CLOCK_TYPE_PC2CC3T_S */
140 { CLK(PERIPH), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
141 CLK(OSC), CLK(NONE), CLK(SFROM32KHZ), CLK(NONE),
142 MASK_BITS_31_29},
143 /* CLOCK_TYPE_AC2CC3P_TS2 */
144 { CLK(AUDIO), CLK(CGENERAL2), CLK(CGENERAL), CLK(CGENERAL3),
145 CLK(PERIPH), CLK(NONE), CLK(OSC), CLK(SRC2),
146 MASK_BITS_31_29},
147};
148
149/*
150 * Clock type for each peripheral clock source. We put the name in each
151 * record just so it is easy to match things up
152 */
153#define TYPE(name, type) type
154static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = {
155 /* 0x00 */
156 TYPE(PERIPHC_I2S1, CLOCK_TYPE_AXPT),
157 TYPE(PERIPHC_I2S2, CLOCK_TYPE_AXPT),
158 TYPE(PERIPHC_SPDIF_OUT, CLOCK_TYPE_AXPT),
159 TYPE(PERIPHC_SPDIF_IN, CLOCK_TYPE_PC2CC3M),
160 TYPE(PERIPHC_PWM, CLOCK_TYPE_PC2CC3S_T),
161 TYPE(PERIPHC_05h, CLOCK_TYPE_NONE),
162 TYPE(PERIPHC_SBC2, CLOCK_TYPE_PC2CC3M_T),
163 TYPE(PERIPHC_SBC3, CLOCK_TYPE_PC2CC3M_T),
164
165 /* 0x08 */
166 TYPE(PERIPHC_08h, CLOCK_TYPE_NONE),
167 TYPE(PERIPHC_I2C1, CLOCK_TYPE_PC2CC3M_T16),
168 TYPE(PERIPHC_I2C5, CLOCK_TYPE_PC2CC3M_T16),
169 TYPE(PERIPHC_0bh, CLOCK_TYPE_NONE),
170 TYPE(PERIPHC_0ch, CLOCK_TYPE_NONE),
171 TYPE(PERIPHC_SBC1, CLOCK_TYPE_PC2CC3M_T),
172 TYPE(PERIPHC_DISP1, CLOCK_TYPE_PMDACD2T),
173 TYPE(PERIPHC_DISP2, CLOCK_TYPE_PMDACD2T),
174
175 /* 0x10 */
176 TYPE(PERIPHC_10h, CLOCK_TYPE_NONE),
177 TYPE(PERIPHC_11h, CLOCK_TYPE_NONE),
178 TYPE(PERIPHC_VI, CLOCK_TYPE_MC2CC3P_A),
179 TYPE(PERIPHC_13h, CLOCK_TYPE_NONE),
180 TYPE(PERIPHC_SDMMC1, CLOCK_TYPE_PC2CC3M_T),
181 TYPE(PERIPHC_SDMMC2, CLOCK_TYPE_PC2CC3M_T),
182 TYPE(PERIPHC_16h, CLOCK_TYPE_NONE),
183 TYPE(PERIPHC_17h, CLOCK_TYPE_NONE),
184
185 /* 0x18 */
186 TYPE(PERIPHC_18h, CLOCK_TYPE_NONE),
187 TYPE(PERIPHC_SDMMC4, CLOCK_TYPE_PC2CC3M_T),
188 TYPE(PERIPHC_VFIR, CLOCK_TYPE_PC2CC3M_T),
189 TYPE(PERIPHC_1Bh, CLOCK_TYPE_NONE),
190 TYPE(PERIPHC_1Ch, CLOCK_TYPE_NONE),
191 TYPE(PERIPHC_HSI, CLOCK_TYPE_PC2CC3M_T),
192 TYPE(PERIPHC_UART1, CLOCK_TYPE_PC2CC3M_T),
193 TYPE(PERIPHC_UART2, CLOCK_TYPE_PC2CC3M_T),
194
195 /* 0x20 */
196 TYPE(PERIPHC_HOST1X, CLOCK_TYPE_MC2CC3P_A),
197 TYPE(PERIPHC_21h, CLOCK_TYPE_NONE),
198 TYPE(PERIPHC_22h, CLOCK_TYPE_NONE),
199 TYPE(PERIPHC_HDMI, CLOCK_TYPE_PMDACD2T),
200 TYPE(PERIPHC_24h, CLOCK_TYPE_NONE),
201 TYPE(PERIPHC_25h, CLOCK_TYPE_NONE),
202 TYPE(PERIPHC_I2C2, CLOCK_TYPE_PC2CC3M_T16),
203 TYPE(PERIPHC_EMC, CLOCK_TYPE_MCPTM2C2C3),
204
205 /* 0x28 */
206 TYPE(PERIPHC_UART3, CLOCK_TYPE_PC2CC3M_T),
207 TYPE(PERIPHC_29h, CLOCK_TYPE_NONE),
208 TYPE(PERIPHC_VI_SENSOR, CLOCK_TYPE_MC2CC3P_A),
209 TYPE(PERIPHC_2bh, CLOCK_TYPE_NONE),
210 TYPE(PERIPHC_2ch, CLOCK_TYPE_NONE),
211 TYPE(PERIPHC_SBC4, CLOCK_TYPE_PC2CC3M_T),
212 TYPE(PERIPHC_I2C3, CLOCK_TYPE_PC2CC3M_T16),
213 TYPE(PERIPHC_SDMMC3, CLOCK_TYPE_PC2CC3M_T),
214
215 /* 0x30 */
216 TYPE(PERIPHC_UART4, CLOCK_TYPE_PC2CC3M_T),
217 TYPE(PERIPHC_UART5, CLOCK_TYPE_PC2CC3M_T),
218 TYPE(PERIPHC_VDE, CLOCK_TYPE_PC2CC3M_T),
219 TYPE(PERIPHC_OWR, CLOCK_TYPE_PC2CC3M_T),
220 TYPE(PERIPHC_NOR, CLOCK_TYPE_PC2CC3M_T),
221 TYPE(PERIPHC_CSITE, CLOCK_TYPE_PC2CC3M_T),
222 TYPE(PERIPHC_I2S0, CLOCK_TYPE_AXPT),
223 TYPE(PERIPHC_DTV, CLOCK_TYPE_NONE),
224
225 /* 0x38 */
226 TYPE(PERIPHC_38h, CLOCK_TYPE_NONE),
227 TYPE(PERIPHC_39h, CLOCK_TYPE_NONE),
228 TYPE(PERIPHC_3ah, CLOCK_TYPE_NONE),
229 TYPE(PERIPHC_3bh, CLOCK_TYPE_NONE),
230 TYPE(PERIPHC_MSENC, CLOCK_TYPE_MC2CC3P_A),
231 TYPE(PERIPHC_TSEC, CLOCK_TYPE_PC2CC3M_T),
232 TYPE(PERIPHC_3eh, CLOCK_TYPE_NONE),
233 TYPE(PERIPHC_OSC, CLOCK_TYPE_NONE),
234
235 /* 0x40 */
236 TYPE(PERIPHC_40h, CLOCK_TYPE_NONE), /* start with 0x3b0 */
237 TYPE(PERIPHC_MSELECT, CLOCK_TYPE_PC2CC3M_T),
238 TYPE(PERIPHC_TSENSOR, CLOCK_TYPE_PC2CC3T_S),
239 TYPE(PERIPHC_I2S3, CLOCK_TYPE_AXPT),
240 TYPE(PERIPHC_I2S4, CLOCK_TYPE_AXPT),
241 TYPE(PERIPHC_I2C4, CLOCK_TYPE_PC2CC3M_T16),
242 TYPE(PERIPHC_SBC5, CLOCK_TYPE_PC2CC3M_T),
243 TYPE(PERIPHC_SBC6, CLOCK_TYPE_PC2CC3M_T),
244
245 /* 0x48 */
246 TYPE(PERIPHC_AUDIO, CLOCK_TYPE_AC2CC3P_TS2),
247 TYPE(PERIPHC_49h, CLOCK_TYPE_NONE),
248 TYPE(PERIPHC_DAM0, CLOCK_TYPE_AC2CC3P_TS2),
249 TYPE(PERIPHC_DAM1, CLOCK_TYPE_AC2CC3P_TS2),
250 TYPE(PERIPHC_DAM2, CLOCK_TYPE_AC2CC3P_TS2),
251 TYPE(PERIPHC_HDA2CODEC2X, CLOCK_TYPE_PC2CC3M_T),
252 TYPE(PERIPHC_ACTMON, CLOCK_TYPE_PC2CC3S_T),
253 TYPE(PERIPHC_EXTPERIPH1, CLOCK_TYPE_ASPTE),
254
255 /* 0x50 */
256 TYPE(PERIPHC_EXTPERIPH2, CLOCK_TYPE_ASPTE),
257 TYPE(PERIPHC_EXTPERIPH3, CLOCK_TYPE_ASPTE),
258 TYPE(PERIPHC_52h, CLOCK_TYPE_NONE),
259 TYPE(PERIPHC_I2CSLOW, CLOCK_TYPE_PC2CC3S_T),
260 TYPE(PERIPHC_SYS, CLOCK_TYPE_NONE),
261 TYPE(PERIPHC_55h, CLOCK_TYPE_NONE),
262 TYPE(PERIPHC_56h, CLOCK_TYPE_NONE),
263 TYPE(PERIPHC_57h, CLOCK_TYPE_NONE),
264
265 /* 0x58 */
266 TYPE(PERIPHC_58h, CLOCK_TYPE_NONE),
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]267 TYPE(PERIPHC_SOR, CLOCK_TYPE_NONE),
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]268 TYPE(PERIPHC_5ah, CLOCK_TYPE_NONE),
269 TYPE(PERIPHC_5bh, CLOCK_TYPE_NONE),
270 TYPE(PERIPHC_SATAOOB, CLOCK_TYPE_PCMT),
271 TYPE(PERIPHC_SATA, CLOCK_TYPE_PCMT),
272 TYPE(PERIPHC_HDA, CLOCK_TYPE_PC2CC3M_T),
273 TYPE(PERIPHC_5fh, CLOCK_TYPE_NONE),
274
275 /* 0x60 */
276 TYPE(PERIPHC_XUSB_CORE_HOST, CLOCK_TYPE_NONE),
277 TYPE(PERIPHC_XUSB_FALCON, CLOCK_TYPE_NONE),
278 TYPE(PERIPHC_XUSB_FS, CLOCK_TYPE_NONE),
279 TYPE(PERIPHC_XUSB_CORE_DEV, CLOCK_TYPE_NONE),
280 TYPE(PERIPHC_XUSB_SS, CLOCK_TYPE_NONE),
281 TYPE(PERIPHC_CILAB, CLOCK_TYPE_NONE),
282 TYPE(PERIPHC_CILCD, CLOCK_TYPE_NONE),
283 TYPE(PERIPHC_CILE, CLOCK_TYPE_NONE),
284
285 /* 0x68 */
286 TYPE(PERIPHC_DSIA_LP, CLOCK_TYPE_NONE),
287 TYPE(PERIPHC_DSIB_LP, CLOCK_TYPE_NONE),
288 TYPE(PERIPHC_ENTROPY, CLOCK_TYPE_NONE),
289 TYPE(PERIPHC_DVFS_REF, CLOCK_TYPE_NONE),
290 TYPE(PERIPHC_DVFS_SOC, CLOCK_TYPE_NONE),
291 TYPE(PERIPHC_TRACECLKIN, CLOCK_TYPE_NONE),
292 TYPE(PERIPHC_ADX0, CLOCK_TYPE_NONE),
293 TYPE(PERIPHC_AMX0, CLOCK_TYPE_NONE),
294
295 /* 0x70 */
296 TYPE(PERIPHC_EMC_LATENCY, CLOCK_TYPE_NONE),
297 TYPE(PERIPHC_SOC_THERM, CLOCK_TYPE_NONE),
298 TYPE(PERIPHC_72h, CLOCK_TYPE_NONE),
299 TYPE(PERIPHC_73h, CLOCK_TYPE_NONE),
300 TYPE(PERIPHC_74h, CLOCK_TYPE_NONE),
301 TYPE(PERIPHC_75h, CLOCK_TYPE_NONE),
302 TYPE(PERIPHC_VI_SENSOR2, CLOCK_TYPE_NONE),
303 TYPE(PERIPHC_I2C6, CLOCK_TYPE_PC2CC3M_T16),
304
305 /* 0x78 */
306 TYPE(PERIPHC_78h, CLOCK_TYPE_NONE),
307 TYPE(PERIPHC_EMC_DLL, CLOCK_TYPE_MCPTM2C2C3),
308 TYPE(PERIPHC_HDMI_AUDIO, CLOCK_TYPE_NONE),
309 TYPE(PERIPHC_CLK72MHZ, CLOCK_TYPE_NONE),
310 TYPE(PERIPHC_ADX1, CLOCK_TYPE_AC2CC3P_TS2),
311 TYPE(PERIPHC_AMX1, CLOCK_TYPE_AC2CC3P_TS2),
312 TYPE(PERIPHC_VIC, CLOCK_TYPE_NONE),
313 TYPE(PERIPHC_7Fh, CLOCK_TYPE_NONE),
314};
315
316/*
317 * This array translates a periph_id to a periphc_internal_id
318 *
319 * Not present/matched up:
320 * uint vi_sensor; _VI_SENSOR_0, 0x1A8
321 * SPDIF - which is both 0x08 and 0x0c
322 *
323 */
324#define NONE(name) (-1)
325#define OFFSET(name, value) PERIPHC_ ## name
326static s8 periph_id_to_internal_id[PERIPH_ID_COUNT] = {
327 /* Low word: 31:0 */
328 NONE(CPU),
329 NONE(COP),
330 NONE(TRIGSYS),
331 NONE(ISPB),
332 NONE(RESERVED4),
333 NONE(TMR),
334 PERIPHC_UART1,
335 PERIPHC_UART2, /* and vfir 0x68 */
336
337 /* 8 */
338 NONE(GPIO),
339 PERIPHC_SDMMC2,
340 PERIPHC_SPDIF_IN,
341 PERIPHC_I2S1,
342 PERIPHC_I2C1,
343 NONE(RESERVED13),
344 PERIPHC_SDMMC1,
345 PERIPHC_SDMMC4,
346
347 /* 16 */
348 NONE(TCW),
349 PERIPHC_PWM,
350 PERIPHC_I2S2,
351 NONE(RESERVED19),
352 PERIPHC_VI,
353 NONE(RESERVED21),
354 NONE(USBD),
355 NONE(ISP),
356
357 /* 24 */
358 NONE(RESERVED24),
359 NONE(RESERVED25),
360 PERIPHC_DISP2,
361 PERIPHC_DISP1,
362 PERIPHC_HOST1X,
363 NONE(VCP),
364 PERIPHC_I2S0,
365 NONE(CACHE2),
366
367 /* Middle word: 63:32 */
368 NONE(MEM),
369 NONE(AHBDMA),
370 NONE(APBDMA),
371 NONE(RESERVED35),
372 NONE(RESERVED36),
373 NONE(STAT_MON),
374 NONE(RESERVED38),
375 NONE(FUSE),
376
377 /* 40 */
378 NONE(KFUSE),
379 PERIPHC_SBC1, /* SBCx = SPIx */
380 PERIPHC_NOR,
381 NONE(RESERVED43),
382 PERIPHC_SBC2,
383 NONE(XIO),
384 PERIPHC_SBC3,
385 PERIPHC_I2C5,
386
387 /* 48 */
388 NONE(DSI),
389 NONE(RESERVED49),
390 PERIPHC_HSI,
391 PERIPHC_HDMI,
392 NONE(CSI),
393 NONE(RESERVED53),
394 PERIPHC_I2C2,
395 PERIPHC_UART3,
396
397 /* 56 */
398 NONE(MIPI_CAL),
399 PERIPHC_EMC,
400 NONE(USB2),
401 NONE(USB3),
402 NONE(RESERVED60),
403 PERIPHC_VDE,
404 NONE(BSEA),
405 NONE(BSEV),
406
407 /* Upper word 95:64 */
408 NONE(RESERVED64),
409 PERIPHC_UART4,
410 PERIPHC_UART5,
411 PERIPHC_I2C3,
412 PERIPHC_SBC4,
413 PERIPHC_SDMMC3,
414 NONE(PCIE),
415 PERIPHC_OWR,
416
417 /* 72 */
418 NONE(AFI),
419 PERIPHC_CSITE,
420 NONE(PCIEXCLK),
421 NONE(AVPUCQ),
422 NONE(LA),
423 NONE(TRACECLKIN),
424 NONE(SOC_THERM),
425 NONE(DTV),
426
427 /* 80 */
428 NONE(RESERVED80),
429 PERIPHC_I2CSLOW,
430 NONE(DSIB),
431 PERIPHC_TSEC,
432 NONE(RESERVED84),
433 NONE(RESERVED85),
434 NONE(RESERVED86),
435 NONE(EMUCIF),
436
437 /* 88 */
438 NONE(RESERVED88),
439 NONE(XUSB_HOST),
440 NONE(RESERVED90),
441 PERIPHC_MSENC,
442 NONE(RESERVED92),
443 NONE(RESERVED93),
444 NONE(RESERVED94),
445 NONE(XUSB_DEV),
446
447 /* V word: 31:0 */
448 NONE(CPUG),
449 NONE(CPULP),
450 NONE(V_RESERVED2),
451 PERIPHC_MSELECT,
452 NONE(V_RESERVED4),
453 PERIPHC_I2S3,
454 PERIPHC_I2S4,
455 PERIPHC_I2C4,
456
457 /* 104 */
458 PERIPHC_SBC5,
459 PERIPHC_SBC6,
460 PERIPHC_AUDIO,
461 NONE(APBIF),
462 PERIPHC_DAM0,
463 PERIPHC_DAM1,
464 PERIPHC_DAM2,
465 PERIPHC_HDA2CODEC2X,
466
467 /* 112 */
468 NONE(ATOMICS),
469 NONE(V_RESERVED17),
470 NONE(V_RESERVED18),
471 NONE(V_RESERVED19),
472 NONE(V_RESERVED20),
473 NONE(V_RESERVED21),
474 NONE(V_RESERVED22),
475 PERIPHC_ACTMON,
476
477 /* 120 */
Simon Glass057772b2015-06-05 14:39:39 -0600[diff] [blame^]478 PERIPHC_EXTPERIPH1,
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]479 NONE(EXTPERIPH2),
480 NONE(EXTPERIPH3),
481 NONE(OOB),
482 PERIPHC_SATA,
483 PERIPHC_HDA,
484 NONE(TZRAM),
485 NONE(SE),
486
487 /* W word: 31:0 */
488 NONE(HDA2HDMICODEC),
489 NONE(SATACOLD),
490 NONE(W_RESERVED2),
491 NONE(W_RESERVED3),
492 NONE(W_RESERVED4),
493 NONE(W_RESERVED5),
494 NONE(W_RESERVED6),
495 NONE(W_RESERVED7),
496
497 /* 136 */
498 NONE(CEC),
499 NONE(W_RESERVED9),
500 NONE(W_RESERVED10),
501 NONE(W_RESERVED11),
502 NONE(W_RESERVED12),
503 NONE(W_RESERVED13),
504 NONE(XUSB_PADCTL),
505 NONE(W_RESERVED15),
506
507 /* 144 */
508 NONE(W_RESERVED16),
509 NONE(W_RESERVED17),
510 NONE(W_RESERVED18),
511 NONE(W_RESERVED19),
512 NONE(W_RESERVED20),
513 NONE(ENTROPY),
514 NONE(DDS),
515 NONE(W_RESERVED23),
516
517 /* 152 */
518 NONE(DP2),
519 NONE(AMX0),
520 NONE(ADX0),
521 NONE(DVFS),
522 NONE(XUSB_SS),
523 NONE(W_RESERVED29),
524 NONE(W_RESERVED30),
525 NONE(W_RESERVED31),
526
527 /* X word: 31:0 */
528 NONE(SPARE),
529 NONE(X_RESERVED1),
530 NONE(X_RESERVED2),
531 NONE(X_RESERVED3),
532 NONE(CAM_MCLK),
533 NONE(CAM_MCLK2),
534 PERIPHC_I2C6,
535 NONE(X_RESERVED7),
536
537 /* 168 */
538 NONE(X_RESERVED8),
539 NONE(X_RESERVED9),
540 NONE(X_RESERVED10),
541 NONE(VIM2_CLK),
542 NONE(X_RESERVED12),
543 NONE(X_RESERVED13),
544 NONE(EMC_DLL),
545 NONE(X_RESERVED15),
546
547 /* 176 */
548 NONE(HDMI_AUDIO),
549 NONE(CLK72MHZ),
550 NONE(VIC),
551 NONE(X_RESERVED19),
552 NONE(ADX1),
553 NONE(DPAUX),
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]554 PERIPHC_SOR,
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]555 NONE(X_RESERVED23),
556
557 /* 184 */
558 NONE(GPU),
559 NONE(AMX1),
560 NONE(X_RESERVED26),
561 NONE(X_RESERVED27),
562 NONE(X_RESERVED28),
563 NONE(X_RESERVED29),
564 NONE(X_RESERVED30),
565 NONE(X_RESERVED31),
566};
567
568/*
569 * Get the oscillator frequency, from the corresponding hardware configuration
570 * field. Note that Tegra30+ support 3 new higher freqs, but we map back
571 * to the old T20 freqs. Support for the higher oscillators is TBD.
572 */
573enum clock_osc_freq clock_get_osc_freq(void)
574{
575 struct clk_rst_ctlr *clkrst =
576 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
577 u32 reg;
578
579 reg = readl(&clkrst->crc_osc_ctrl);
580 reg = (reg & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT;
581
582 if (reg & 1) /* one of the newer freqs */
583 printf("Warning: OSC_FREQ is unsupported! (%d)\n", reg);
584
585 return reg >> 2; /* Map to most common (T20) freqs */
586}
587
588/* Returns a pointer to the clock source register for a peripheral */
589u32 *get_periph_source_reg(enum periph_id periph_id)
590{
591 struct clk_rst_ctlr *clkrst =
592 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
593 enum periphc_internal_id internal_id;
594
595 /* Coresight is a special case */
596 if (periph_id == PERIPH_ID_CSI)
597 return &clkrst->crc_clk_src[PERIPH_ID_CSI+1];
598
599 assert(periph_id >= PERIPH_ID_FIRST && periph_id < PERIPH_ID_COUNT);
600 internal_id = periph_id_to_internal_id[periph_id];
601 assert(internal_id != -1);
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]602 if (internal_id >= PERIPHC_X_FIRST) {
603 internal_id -= PERIPHC_X_FIRST;
604 return &clkrst->crc_clk_src_x[internal_id];
605 } else if (internal_id >= PERIPHC_VW_FIRST) {
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]606 internal_id -= PERIPHC_VW_FIRST;
607 return &clkrst->crc_clk_src_vw[internal_id];
608 } else {
609 return &clkrst->crc_clk_src[internal_id];
610 }
611}
612
613/**
614 * Given a peripheral ID and the required source clock, this returns which
615 * value should be programmed into the source mux for that peripheral.
616 *
617 * There is special code here to handle the one source type with 5 sources.
618 *
619 * @param periph_id peripheral to start
620 * @param source PLL id of required parent clock
621 * @param mux_bits Set to number of bits in mux register: 2 or 4
622 * @param divider_bits Set to number of divider bits (8 or 16)
623 * @return mux value (0-4, or -1 if not found)
624 */
625int get_periph_clock_source(enum periph_id periph_id,
626 enum clock_id parent, int *mux_bits, int *divider_bits)
627{
628 enum clock_type_id type;
629 enum periphc_internal_id internal_id;
630 int mux;
631
632 assert(clock_periph_id_isvalid(periph_id));
633
634 internal_id = periph_id_to_internal_id[periph_id];
635 assert(periphc_internal_id_isvalid(internal_id));
636
637 type = clock_periph_type[internal_id];
638 assert(clock_type_id_isvalid(type));
639
640 *mux_bits = clock_source[type][CLOCK_MAX_MUX];
641
642 if (type == CLOCK_TYPE_PC2CC3M_T16)
643 *divider_bits = 16;
644 else
645 *divider_bits = 8;
646
647 for (mux = 0; mux < CLOCK_MAX_MUX; mux++)
648 if (clock_source[type][mux] == parent)
649 return mux;
650
651 /* if we get here, either us or the caller has made a mistake */
652 printf("Caller requested bad clock: periph=%d, parent=%d\n", periph_id,
653 parent);
654 return -1;
655}
656
657void clock_set_enable(enum periph_id periph_id, int enable)
658{
659 struct clk_rst_ctlr *clkrst =
660 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
661 u32 *clk;
662 u32 reg;
663
664 /* Enable/disable the clock to this peripheral */
665 assert(clock_periph_id_isvalid(periph_id));
666 if ((int)periph_id < (int)PERIPH_ID_VW_FIRST)
667 clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)];
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]668 else if ((int)periph_id < PERIPH_ID_X_FIRST)
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]669 clk = &clkrst->crc_clk_out_enb_vw[PERIPH_REG(periph_id)];
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]670 else
671 clk = &clkrst->crc_clk_out_enb_x;
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]672 reg = readl(clk);
673 if (enable)
674 reg |= PERIPH_MASK(periph_id);
675 else
676 reg &= ~PERIPH_MASK(periph_id);
677 writel(reg, clk);
678}
679
680void reset_set_enable(enum periph_id periph_id, int enable)
681{
682 struct clk_rst_ctlr *clkrst =
683 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
684 u32 *reset;
685 u32 reg;
686
687 /* Enable/disable reset to the peripheral */
688 assert(clock_periph_id_isvalid(periph_id));
689 if (periph_id < PERIPH_ID_VW_FIRST)
690 reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)];
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]691 else if ((int)periph_id < PERIPH_ID_X_FIRST)
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]692 reset = &clkrst->crc_rst_dev_vw[PERIPH_REG(periph_id)];
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]693 else
694 reset = &clkrst->crc_rst_devices_x;
Tom Warren52ef43b2014-01-24 12:46:15 -0700[diff] [blame]695 reg = readl(reset);
696 if (enable)
697 reg |= PERIPH_MASK(periph_id);
698 else
699 reg &= ~PERIPH_MASK(periph_id);
700 writel(reg, reset);
701}
702
703#ifdef CONFIG_OF_CONTROL
704/*
705 * Convert a device tree clock ID to our peripheral ID. They are mostly
706 * the same but we are very cautious so we check that a valid clock ID is
707 * provided.
708 *
709 * @param clk_id Clock ID according to tegra124 device tree binding
710 * @return peripheral ID, or PERIPH_ID_NONE if the clock ID is invalid
711 */
712enum periph_id clk_id_to_periph_id(int clk_id)
713{
714 if (clk_id > PERIPH_ID_COUNT)
715 return PERIPH_ID_NONE;
716
717 switch (clk_id) {
718 case PERIPH_ID_RESERVED4:
719 case PERIPH_ID_RESERVED25:
720 case PERIPH_ID_RESERVED35:
721 case PERIPH_ID_RESERVED36:
722 case PERIPH_ID_RESERVED38:
723 case PERIPH_ID_RESERVED43:
724 case PERIPH_ID_RESERVED49:
725 case PERIPH_ID_RESERVED53:
726 case PERIPH_ID_RESERVED64:
727 case PERIPH_ID_RESERVED84:
728 case PERIPH_ID_RESERVED85:
729 case PERIPH_ID_RESERVED86:
730 case PERIPH_ID_RESERVED88:
731 case PERIPH_ID_RESERVED90:
732 case PERIPH_ID_RESERVED92:
733 case PERIPH_ID_RESERVED93:
734 case PERIPH_ID_RESERVED94:
735 case PERIPH_ID_V_RESERVED2:
736 case PERIPH_ID_V_RESERVED4:
737 case PERIPH_ID_V_RESERVED17:
738 case PERIPH_ID_V_RESERVED18:
739 case PERIPH_ID_V_RESERVED19:
740 case PERIPH_ID_V_RESERVED20:
741 case PERIPH_ID_V_RESERVED21:
742 case PERIPH_ID_V_RESERVED22:
743 case PERIPH_ID_W_RESERVED2:
744 case PERIPH_ID_W_RESERVED3:
745 case PERIPH_ID_W_RESERVED4:
746 case PERIPH_ID_W_RESERVED5:
747 case PERIPH_ID_W_RESERVED6:
748 case PERIPH_ID_W_RESERVED7:
749 case PERIPH_ID_W_RESERVED9:
750 case PERIPH_ID_W_RESERVED10:
751 case PERIPH_ID_W_RESERVED11:
752 case PERIPH_ID_W_RESERVED12:
753 case PERIPH_ID_W_RESERVED13:
754 case PERIPH_ID_W_RESERVED15:
755 case PERIPH_ID_W_RESERVED16:
756 case PERIPH_ID_W_RESERVED17:
757 case PERIPH_ID_W_RESERVED18:
758 case PERIPH_ID_W_RESERVED19:
759 case PERIPH_ID_W_RESERVED20:
760 case PERIPH_ID_W_RESERVED23:
761 case PERIPH_ID_W_RESERVED29:
762 case PERIPH_ID_W_RESERVED30:
763 case PERIPH_ID_W_RESERVED31:
764 return PERIPH_ID_NONE;
765 default:
766 return clk_id;
767 }
768}
769#endif /* CONFIG_OF_CONTROL */
770
771void clock_early_init(void)
772{
773 struct clk_rst_ctlr *clkrst =
774 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
775
776 tegra30_set_up_pllp();
777
778 /*
779 * PLLC output frequency set to 600Mhz
780 * PLLD output frequency set to 925Mhz
781 */
782 switch (clock_get_osc_freq()) {
783 case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
784 clock_set_rate(CLOCK_ID_CGENERAL, 600, 12, 0, 8);
785 clock_set_rate(CLOCK_ID_DISPLAY, 925, 12, 0, 12);
786 break;
787
788 case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
789 clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8);
790 clock_set_rate(CLOCK_ID_DISPLAY, 925, 26, 0, 12);
791 break;
792
793 case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */
794 clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8);
795 clock_set_rate(CLOCK_ID_DISPLAY, 925, 13, 0, 12);
796 break;
797 case CLOCK_OSC_FREQ_19_2:
798 default:
799 /*
800 * These are not supported. It is too early to print a
801 * message and the UART likely won't work anyway due to the
802 * oscillator being wrong.
803 */
804 break;
805 }
806
807 /* PLLC_MISC2: Set dynramp_stepA/B. MISC2 maps to pll_out[1] */
808 writel(0x00561600, &clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_out[1]);
809
810 /* PLLC_MISC: Set LOCK_ENABLE */
811 writel(0x01000000, &clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_misc);
812 udelay(2);
813
814 /* PLLD_MISC: Set CLKENABLE, CPCON 12, LFCON 1 */
815 writel(0x40000C10, &clkrst->crc_pll[CLOCK_ID_DISPLAY].pll_misc);
816 udelay(2);
817}
818
819void arch_timer_init(void)
820{
821 struct sysctr_ctlr *sysctr = (struct sysctr_ctlr *)NV_PA_TSC_BASE;
822 u32 freq, val;
823
824 freq = clock_get_rate(CLOCK_ID_OSC);
825 debug("%s: osc freq is %dHz [0x%08X]\n", __func__, freq, freq);
826
827 /* ARM CNTFRQ */
828 asm("mcr p15, 0, %0, c14, c0, 0\n" : : "r" (freq));
829
830 /* Only Tegra114+ has the System Counter regs */
831 debug("%s: setting CNTFID0 to 0x%08X\n", __func__, freq);
832 writel(freq, &sysctr->cntfid0);
833
834 val = readl(&sysctr->cntcr);
835 val |= TSC_CNTCR_ENABLE | TSC_CNTCR_HDBG;
836 writel(val, &sysctr->cntcr);
837 debug("%s: TSC CNTCR = 0x%08X\n", __func__, val);
838}
Thierry Redinga7230742014-12-09 22:25:06 -0700[diff] [blame]839
840#define PLLE_SS_CNTL 0x68
841#define PLLE_SS_CNTL_SSCINCINTR(x) (((x) & 0x3f) << 24)
842#define PLLE_SS_CNTL_SSCINC(x) (((x) & 0xff) << 16)
843#define PLLE_SS_CNTL_SSCINVERT (1 << 15)
844#define PLLE_SS_CNTL_SSCCENTER (1 << 14)
845#define PLLE_SS_CNTL_SSCBYP (1 << 12)
846#define PLLE_SS_CNTL_INTERP_RESET (1 << 11)
847#define PLLE_SS_CNTL_BYPASS_SS (1 << 10)
848#define PLLE_SS_CNTL_SSCMAX(x) (((x) & 0x1ff) << 0)
849
850#define PLLE_BASE 0x0e8
851#define PLLE_BASE_ENABLE (1 << 30)
852#define PLLE_BASE_LOCK_OVERRIDE (1 << 29)
853#define PLLE_BASE_PLDIV_CML(x) (((x) & 0xf) << 24)
854#define PLLE_BASE_NDIV(x) (((x) & 0xff) << 8)
855#define PLLE_BASE_MDIV(x) (((x) & 0xff) << 0)
856
857#define PLLE_MISC 0x0ec
858#define PLLE_MISC_IDDQ_SWCTL (1 << 14)
859#define PLLE_MISC_IDDQ_OVERRIDE (1 << 13)
860#define PLLE_MISC_LOCK_ENABLE (1 << 9)
861#define PLLE_MISC_PTS (1 << 8)
862#define PLLE_MISC_VREG_BG_CTRL(x) (((x) & 0x3) << 4)
863#define PLLE_MISC_VREG_CTRL(x) (((x) & 0x3) << 2)
864
865#define PLLE_AUX 0x48c
866#define PLLE_AUX_SEQ_ENABLE (1 << 24)
867#define PLLE_AUX_ENABLE_SWCTL (1 << 4)
868
869int tegra_plle_enable(void)
870{
871 unsigned int m = 1, n = 200, cpcon = 13;
872 u32 value;
873
874 value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE);
875 value &= ~PLLE_BASE_LOCK_OVERRIDE;
876 writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE);
877
878 value = readl(NV_PA_CLK_RST_BASE + PLLE_AUX);
879 value |= PLLE_AUX_ENABLE_SWCTL;
880 value &= ~PLLE_AUX_SEQ_ENABLE;
881 writel(value, NV_PA_CLK_RST_BASE + PLLE_AUX);
882
883 udelay(1);
884
885 value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC);
886 value |= PLLE_MISC_IDDQ_SWCTL;
887 value &= ~PLLE_MISC_IDDQ_OVERRIDE;
888 value |= PLLE_MISC_LOCK_ENABLE;
889 value |= PLLE_MISC_PTS;
890 value |= PLLE_MISC_VREG_BG_CTRL(3);
891 value |= PLLE_MISC_VREG_CTRL(2);
892 writel(value, NV_PA_CLK_RST_BASE + PLLE_MISC);
893
894 udelay(5);
895
896 value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
897 value |= PLLE_SS_CNTL_SSCBYP | PLLE_SS_CNTL_INTERP_RESET |
898 PLLE_SS_CNTL_BYPASS_SS;
899 writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
900
901 value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE);
902 value &= ~PLLE_BASE_PLDIV_CML(0xf);
903 value &= ~PLLE_BASE_NDIV(0xff);
904 value &= ~PLLE_BASE_MDIV(0xff);
905 value |= PLLE_BASE_PLDIV_CML(cpcon);
906 value |= PLLE_BASE_NDIV(n);
907 value |= PLLE_BASE_MDIV(m);
908 writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE);
909
910 udelay(1);
911
912 value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE);
913 value |= PLLE_BASE_ENABLE;
914 writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE);
915
916 /* wait for lock */
917 udelay(300);
918
919 value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
920 value &= ~PLLE_SS_CNTL_SSCINVERT;
921 value &= ~PLLE_SS_CNTL_SSCCENTER;
922
923 value &= ~PLLE_SS_CNTL_SSCINCINTR(0x3f);
924 value &= ~PLLE_SS_CNTL_SSCINC(0xff);
925 value &= ~PLLE_SS_CNTL_SSCMAX(0x1ff);
926
927 value |= PLLE_SS_CNTL_SSCINCINTR(0x20);
928 value |= PLLE_SS_CNTL_SSCINC(0x01);
929 value |= PLLE_SS_CNTL_SSCMAX(0x25);
930
931 writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
932
933 value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
934 value &= ~PLLE_SS_CNTL_SSCBYP;
935 value &= ~PLLE_SS_CNTL_BYPASS_SS;
936 writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
937
938 udelay(1);
939
940 value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
941 value &= ~PLLE_SS_CNTL_INTERP_RESET;
942 writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
943
944 udelay(1);
945
946 return 0;
947}
Simon Glass96e82a22015-04-14 21:03:34 -0600[diff] [blame]948
949void clock_sor_enable_edp_clock(void)
950{
951 u32 *reg;
952
953 /* uses PLLP, has a non-standard bit layout. */
954 reg = get_periph_source_reg(PERIPH_ID_SOR0);
955 setbits_le32(reg, SOR0_CLK_SEL0);
956}
957
958u32 clock_set_display_rate(u32 frequency)
959{
960 /**
961 * plld (fo) = vco >> p, where 500MHz < vco < 1000MHz
962 * = (cf * n) >> p, where 1MHz < cf < 6MHz
963 * = ((ref / m) * n) >> p
964 *
965 * Iterate the possible values of p (3 bits, 2^7) to find out a minimum
966 * safe vco, then find best (m, n). since m has only 5 bits, we can
967 * iterate all possible values. Note Tegra 124 supports 11 bits for n,
968 * but our pll_fields has only 10 bits for n.
969 *
970 * Note values undershoot or overshoot target output frequency may not
971 * work if the values are not in "safe" range by panel specification.
972 */
973 u32 ref = clock_get_rate(CLOCK_ID_OSC);
974 u32 divm, divn, divp, cpcon;
975 u32 cf, vco, rounded_rate = frequency;
976 u32 diff, best_diff, best_m = 0, best_n = 0, best_p;
977 const u32 max_m = 1 << 5, max_n = 1 << 10, max_p = 1 << 3,
978 mhz = 1000 * 1000, min_vco = 500 * mhz, max_vco = 1000 * mhz,
979 min_cf = 1 * mhz, max_cf = 6 * mhz;
980 int mux_bits, divider_bits, source;
981
982 for (divp = 0, vco = frequency; vco < min_vco && divp < max_p; divp++)
983 vco <<= 1;
984
985 if (vco < min_vco || vco > max_vco) {
986 printf("%s: Cannot find out a supported VCO for Frequency (%u)\n",
987 __func__, frequency);
988 return 0;
989 }
990
991 best_p = divp;
992 best_diff = vco;
993
994 for (divm = 1; divm < max_m && best_diff; divm++) {
995 cf = ref / divm;
996 if (cf < min_cf)
997 break;
998 if (cf > max_cf)
999 continue;
1000
1001 divn = vco / cf;
1002 if (divn >= max_n)
1003 continue;
1004
1005 diff = vco - divn * cf;
1006 if (divn + 1 < max_n && diff > cf / 2) {
1007 divn++;
1008 diff = cf - diff;
1009 }
1010
1011 if (diff >= best_diff)
1012 continue;
1013
1014 best_diff = diff;
1015 best_m = divm;
1016 best_n = divn;
1017 }
1018
1019 if (best_n < 50)
1020 cpcon = 2;
1021 else if (best_n < 300)
1022 cpcon = 3;
1023 else if (best_n < 600)
1024 cpcon = 8;
1025 else
1026 cpcon = 12;
1027
1028 if (best_diff) {
1029 printf("%s: Failed to match output frequency %u, best difference is %u\n",
1030 __func__, frequency, best_diff);
1031 rounded_rate = (ref / best_m * best_n) >> best_p;
1032 }
1033
1034 debug("%s: PLLD=%u ref=%u, m/n/p/cpcon=%u/%u/%u/%u\n",
1035 __func__, rounded_rate, ref, best_m, best_n, best_p, cpcon);
1036
1037 source = get_periph_clock_source(PERIPH_ID_DISP1, CLOCK_ID_DISPLAY,
1038 &mux_bits, &divider_bits);
1039 clock_ll_set_source_bits(PERIPH_ID_DISP1, mux_bits, source);
1040 clock_set_rate(CLOCK_ID_DISPLAY, best_n, best_m, best_p, cpcon);
1041
1042 return rounded_rate;
1043}
1044
1045void clock_set_up_plldp(void)
1046{
1047 struct clk_rst_ctlr *clkrst =
1048 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
1049 u32 value;
1050
1051 value = PLLDP_SS_CFG_UNDOCUMENTED | PLLDP_SS_CFG_DITHER;
1052 writel(value | PLLDP_SS_CFG_CLAMP, &clkrst->crc_plldp_ss_cfg);
1053 clock_start_pll(CLOCK_ID_DP, 1, 90, 3, 0, 0);
1054 writel(value, &clkrst->crc_plldp_ss_cfg);
1055}
1056
1057struct clk_pll_simple *clock_get_simple_pll(enum clock_id clkid)
1058{
1059 struct clk_rst_ctlr *clkrst =
1060 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
1061
1062 if (clkid == CLOCK_ID_DP)
1063 return &clkrst->plldp;
1064
1065 return NULL;
1066}