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rockchip: clk: rk3399: fix warnings for unused variables in SPL/non-SPL
[people/ms/u-boot.git] / drivers / clk / rockchip / clk_rk3288.c
1 /*
2 * (C) Copyright 2015 Google, Inc
3 *
4 * SPDX-License-Identifier: GPL-2.0
5 */
6
7 #include <common.h>
8 #include <clk-uclass.h>
9 #include <dm.h>
10 #include <dt-structs.h>
11 #include <errno.h>
12 #include <mapmem.h>
13 #include <syscon.h>
14 #include <asm/io.h>
15 #include <asm/arch/clock.h>
16 #include <asm/arch/cru_rk3288.h>
17 #include <asm/arch/grf_rk3288.h>
18 #include <asm/arch/hardware.h>
19 #include <dt-bindings/clock/rk3288-cru.h>
20 #include <dm/device-internal.h>
21 #include <dm/lists.h>
22 #include <dm/uclass-internal.h>
23 #include <linux/log2.h>
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 struct rk3288_clk_plat {
28 #if CONFIG_IS_ENABLED(OF_PLATDATA)
29 struct dtd_rockchip_rk3288_cru dtd;
30 #endif
31 };
32
33 struct pll_div {
34 u32 nr;
35 u32 nf;
36 u32 no;
37 };
38
39 enum {
40 VCO_MAX_HZ = 2200U * 1000000,
41 VCO_MIN_HZ = 440 * 1000000,
42 OUTPUT_MAX_HZ = 2200U * 1000000,
43 OUTPUT_MIN_HZ = 27500000,
44 FREF_MAX_HZ = 2200U * 1000000,
45 FREF_MIN_HZ = 269 * 1000,
46 };
47
48 enum {
49 /* PLL CON0 */
50 PLL_OD_MASK = 0x0f,
51
52 /* PLL CON1 */
53 PLL_NF_MASK = 0x1fff,
54
55 /* PLL CON2 */
56 PLL_BWADJ_MASK = 0x0fff,
57
58 /* PLL CON3 */
59 PLL_RESET_SHIFT = 5,
60
61 /* CLKSEL0 */
62 CORE_SEL_PLL_MASK = 1,
63 CORE_SEL_PLL_SHIFT = 15,
64 A17_DIV_MASK = 0x1f,
65 A17_DIV_SHIFT = 8,
66 MP_DIV_MASK = 0xf,
67 MP_DIV_SHIFT = 4,
68 M0_DIV_MASK = 0xf,
69 M0_DIV_SHIFT = 0,
70
71 /* CLKSEL1: pd bus clk pll sel: codec or general */
72 PD_BUS_SEL_PLL_MASK = 15,
73 PD_BUS_SEL_CPLL = 0,
74 PD_BUS_SEL_GPLL,
75
76 /* pd bus pclk div: pclk = pd_bus_aclk /(div + 1) */
77 PD_BUS_PCLK_DIV_SHIFT = 12,
78 PD_BUS_PCLK_DIV_MASK = 7,
79
80 /* pd bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */
81 PD_BUS_HCLK_DIV_SHIFT = 8,
82 PD_BUS_HCLK_DIV_MASK = 3,
83
84 /* pd bus aclk div: pd_bus_aclk = pd_bus_src_clk /(div0 * div1) */
85 PD_BUS_ACLK_DIV0_SHIFT = 3,
86 PD_BUS_ACLK_DIV0_MASK = 0x1f,
87 PD_BUS_ACLK_DIV1_SHIFT = 0,
88 PD_BUS_ACLK_DIV1_MASK = 0x7,
89
90 /*
91 * CLKSEL10
92 * peripheral bus pclk div:
93 * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1
94 */
95 PERI_SEL_PLL_MASK = 1,
96 PERI_SEL_PLL_SHIFT = 15,
97 PERI_SEL_CPLL = 0,
98 PERI_SEL_GPLL,
99
100 PERI_PCLK_DIV_SHIFT = 12,
101 PERI_PCLK_DIV_MASK = 3,
102
103 /* peripheral bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */
104 PERI_HCLK_DIV_SHIFT = 8,
105 PERI_HCLK_DIV_MASK = 3,
106
107 /*
108 * peripheral bus aclk div:
109 * aclk_periph = periph_clk_src / (peri_aclk_div_con + 1)
110 */
111 PERI_ACLK_DIV_SHIFT = 0,
112 PERI_ACLK_DIV_MASK = 0x1f,
113
114 SOCSTS_DPLL_LOCK = 1 << 5,
115 SOCSTS_APLL_LOCK = 1 << 6,
116 SOCSTS_CPLL_LOCK = 1 << 7,
117 SOCSTS_GPLL_LOCK = 1 << 8,
118 SOCSTS_NPLL_LOCK = 1 << 9,
119 };
120
121 #define RATE_TO_DIV(input_rate, output_rate) \
122 ((input_rate) / (output_rate) - 1);
123
124 #define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1))
125
126 #define PLL_DIVISORS(hz, _nr, _no) {\
127 .nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\
128 _Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\
129 (_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\
130 "divisors on line " __stringify(__LINE__));
131
132 /* Keep divisors as low as possible to reduce jitter and power usage */
133 static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1);
134 #ifdef CONFIG_SPL_BUILD
135 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
136 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
137 #endif
138
139 static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id,
140 const struct pll_div *div)
141 {
142 int pll_id = rk_pll_id(clk_id);
143 struct rk3288_pll *pll = &cru->pll[pll_id];
144 /* All PLLs have same VCO and output frequency range restrictions. */
145 uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000;
146 uint output_hz = vco_hz / div->no;
147
148 debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n",
149 (uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz);
150 assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
151 output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ &&
152 (div->no == 1 || !(div->no % 2)));
153
154 /* enter reset */
155 rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT);
156
157 rk_clrsetreg(&pll->con0,
158 CLKR_MASK << CLKR_SHIFT | PLL_OD_MASK,
159 ((div->nr - 1) << CLKR_SHIFT) | (div->no - 1));
160 rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1);
161 rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1);
162
163 udelay(10);
164
165 /* return from reset */
166 rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT);
167
168 return 0;
169 }
170
171 static int rkclk_configure_ddr(struct rk3288_cru *cru, struct rk3288_grf *grf,
172 unsigned int hz)
173 {
174 static const struct pll_div dpll_cfg[] = {
175 {.nf = 25, .nr = 2, .no = 1},
176 {.nf = 400, .nr = 9, .no = 2},
177 {.nf = 500, .nr = 9, .no = 2},
178 {.nf = 100, .nr = 3, .no = 1},
179 };
180 int cfg;
181
182 switch (hz) {
183 case 300000000:
184 cfg = 0;
185 break;
186 case 533000000: /* actually 533.3P MHz */
187 cfg = 1;
188 break;
189 case 666000000: /* actually 666.6P MHz */
190 cfg = 2;
191 break;
192 case 800000000:
193 cfg = 3;
194 break;
195 default:
196 debug("Unsupported SDRAM frequency");
197 return -EINVAL;
198 }
199
200 /* pll enter slow-mode */
201 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
202 DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
203
204 rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg]);
205
206 /* wait for pll lock */
207 while (!(readl(&grf->soc_status[1]) & SOCSTS_DPLL_LOCK))
208 udelay(1);
209
210 /* PLL enter normal-mode */
211 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
212 DPLL_MODE_NORMAL << DPLL_MODE_SHIFT);
213
214 return 0;
215 }
216
217 #ifndef CONFIG_SPL_BUILD
218 #define VCO_MAX_KHZ 2200000
219 #define VCO_MIN_KHZ 440000
220 #define FREF_MAX_KHZ 2200000
221 #define FREF_MIN_KHZ 269
222
223 static int pll_para_config(ulong freq_hz, struct pll_div *div, uint *ext_div)
224 {
225 uint ref_khz = OSC_HZ / 1000, nr, nf = 0;
226 uint fref_khz;
227 uint diff_khz, best_diff_khz;
228 const uint max_nr = 1 << 6, max_nf = 1 << 12, max_no = 1 << 4;
229 uint vco_khz;
230 uint no = 1;
231 uint freq_khz = freq_hz / 1000;
232
233 if (!freq_hz) {
234 printf("%s: the frequency can not be 0 Hz\n", __func__);
235 return -EINVAL;
236 }
237
238 no = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz);
239 if (ext_div) {
240 *ext_div = DIV_ROUND_UP(no, max_no);
241 no = DIV_ROUND_UP(no, *ext_div);
242 }
243
244 /* only even divisors (and 1) are supported */
245 if (no > 1)
246 no = DIV_ROUND_UP(no, 2) * 2;
247
248 vco_khz = freq_khz * no;
249 if (ext_div)
250 vco_khz *= *ext_div;
251
252 if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) {
253 printf("%s: Cannot find out a supported VCO for Frequency (%luHz).\n",
254 __func__, freq_hz);
255 return -1;
256 }
257
258 div->no = no;
259
260 best_diff_khz = vco_khz;
261 for (nr = 1; nr < max_nr && best_diff_khz; nr++) {
262 fref_khz = ref_khz / nr;
263 if (fref_khz < FREF_MIN_KHZ)
264 break;
265 if (fref_khz > FREF_MAX_KHZ)
266 continue;
267
268 nf = vco_khz / fref_khz;
269 if (nf >= max_nf)
270 continue;
271 diff_khz = vco_khz - nf * fref_khz;
272 if (nf + 1 < max_nf && diff_khz > fref_khz / 2) {
273 nf++;
274 diff_khz = fref_khz - diff_khz;
275 }
276
277 if (diff_khz >= best_diff_khz)
278 continue;
279
280 best_diff_khz = diff_khz;
281 div->nr = nr;
282 div->nf = nf;
283 }
284
285 if (best_diff_khz > 4 * 1000) {
286 printf("%s: Failed to match output frequency %lu, difference is %u Hz, exceed 4MHZ\n",
287 __func__, freq_hz, best_diff_khz * 1000);
288 return -EINVAL;
289 }
290
291 return 0;
292 }
293
294 static int rockchip_mac_set_clk(struct rk3288_cru *cru,
295 int periph, uint freq)
296 {
297 /* Assuming mac_clk is fed by an external clock */
298 rk_clrsetreg(&cru->cru_clksel_con[21],
299 RMII_EXTCLK_MASK << RMII_EXTCLK_SHIFT,
300 RMII_EXTCLK_SELECT_EXT_CLK << RMII_EXTCLK_SHIFT);
301
302 return 0;
303 }
304
305 static int rockchip_vop_set_clk(struct rk3288_cru *cru, struct rk3288_grf *grf,
306 int periph, unsigned int rate_hz)
307 {
308 struct pll_div npll_config = {0};
309 u32 lcdc_div;
310 int ret;
311
312 ret = pll_para_config(rate_hz, &npll_config, &lcdc_div);
313 if (ret)
314 return ret;
315
316 rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK << NPLL_MODE_SHIFT,
317 NPLL_MODE_SLOW << NPLL_MODE_SHIFT);
318 rkclk_set_pll(cru, CLK_NEW, &npll_config);
319
320 /* waiting for pll lock */
321 while (1) {
322 if (readl(&grf->soc_status[1]) & SOCSTS_NPLL_LOCK)
323 break;
324 udelay(1);
325 }
326
327 rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK << NPLL_MODE_SHIFT,
328 NPLL_MODE_NORMAL << NPLL_MODE_SHIFT);
329
330 /* vop dclk source clk: npll,dclk_div: 1 */
331 switch (periph) {
332 case DCLK_VOP0:
333 rk_clrsetreg(&cru->cru_clksel_con[27], 0xff << 8 | 3 << 0,
334 (lcdc_div - 1) << 8 | 2 << 0);
335 break;
336 case DCLK_VOP1:
337 rk_clrsetreg(&cru->cru_clksel_con[29], 0xff << 8 | 3 << 6,
338 (lcdc_div - 1) << 8 | 2 << 6);
339 break;
340 }
341
342 return 0;
343 }
344 #endif
345
346 #ifdef CONFIG_SPL_BUILD
347 static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf)
348 {
349 u32 aclk_div;
350 u32 hclk_div;
351 u32 pclk_div;
352
353 /* pll enter slow-mode */
354 rk_clrsetreg(&cru->cru_mode_con,
355 GPLL_MODE_MASK << GPLL_MODE_SHIFT |
356 CPLL_MODE_MASK << CPLL_MODE_SHIFT,
357 GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
358 CPLL_MODE_SLOW << CPLL_MODE_SHIFT);
359
360 /* init pll */
361 rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
362 rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg);
363
364 /* waiting for pll lock */
365 while ((readl(&grf->soc_status[1]) &
366 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) !=
367 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK))
368 udelay(1);
369
370 /*
371 * pd_bus clock pll source selection and
372 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
373 */
374 aclk_div = GPLL_HZ / PD_BUS_ACLK_HZ - 1;
375 assert((aclk_div + 1) * PD_BUS_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
376 hclk_div = PD_BUS_ACLK_HZ / PD_BUS_HCLK_HZ - 1;
377 assert((hclk_div + 1) * PD_BUS_HCLK_HZ ==
378 PD_BUS_ACLK_HZ && (hclk_div < 0x4) && (hclk_div != 0x2));
379
380 pclk_div = PD_BUS_ACLK_HZ / PD_BUS_PCLK_HZ - 1;
381 assert((pclk_div + 1) * PD_BUS_PCLK_HZ ==
382 PD_BUS_ACLK_HZ && pclk_div < 0x7);
383
384 rk_clrsetreg(&cru->cru_clksel_con[1],
385 PD_BUS_PCLK_DIV_MASK << PD_BUS_PCLK_DIV_SHIFT |
386 PD_BUS_HCLK_DIV_MASK << PD_BUS_HCLK_DIV_SHIFT |
387 PD_BUS_ACLK_DIV0_MASK << PD_BUS_ACLK_DIV0_SHIFT |
388 PD_BUS_ACLK_DIV1_MASK << PD_BUS_ACLK_DIV1_SHIFT,
389 pclk_div << PD_BUS_PCLK_DIV_SHIFT |
390 hclk_div << PD_BUS_HCLK_DIV_SHIFT |
391 aclk_div << PD_BUS_ACLK_DIV0_SHIFT |
392 0 << 0);
393
394 /*
395 * peri clock pll source selection and
396 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
397 */
398 aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
399 assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
400
401 hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ);
402 assert((1 << hclk_div) * PERI_HCLK_HZ ==
403 PERI_ACLK_HZ && (hclk_div < 0x4));
404
405 pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ);
406 assert((1 << pclk_div) * PERI_PCLK_HZ ==
407 PERI_ACLK_HZ && (pclk_div < 0x4));
408
409 rk_clrsetreg(&cru->cru_clksel_con[10],
410 PERI_PCLK_DIV_MASK << PERI_PCLK_DIV_SHIFT |
411 PERI_HCLK_DIV_MASK << PERI_HCLK_DIV_SHIFT |
412 PERI_ACLK_DIV_MASK << PERI_ACLK_DIV_SHIFT,
413 PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT |
414 pclk_div << PERI_PCLK_DIV_SHIFT |
415 hclk_div << PERI_HCLK_DIV_SHIFT |
416 aclk_div << PERI_ACLK_DIV_SHIFT);
417
418 /* PLL enter normal-mode */
419 rk_clrsetreg(&cru->cru_mode_con,
420 GPLL_MODE_MASK << GPLL_MODE_SHIFT |
421 CPLL_MODE_MASK << CPLL_MODE_SHIFT,
422 GPLL_MODE_NORMAL << GPLL_MODE_SHIFT |
423 CPLL_MODE_NORMAL << CPLL_MODE_SHIFT);
424 }
425 #endif
426
427 void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf)
428 {
429 /* pll enter slow-mode */
430 rk_clrsetreg(&cru->cru_mode_con,
431 APLL_MODE_MASK << APLL_MODE_SHIFT,
432 APLL_MODE_SLOW << APLL_MODE_SHIFT);
433
434 rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg);
435
436 /* waiting for pll lock */
437 while (!(readl(&grf->soc_status[1]) & SOCSTS_APLL_LOCK))
438 udelay(1);
439
440 /*
441 * core clock pll source selection and
442 * set up dependent divisors for MPAXI/M0AXI and ARM clocks.
443 * core clock select apll, apll clk = 1800MHz
444 * arm clk = 1800MHz, mpclk = 450MHz, m0clk = 900MHz
445 */
446 rk_clrsetreg(&cru->cru_clksel_con[0],
447 CORE_SEL_PLL_MASK << CORE_SEL_PLL_SHIFT |
448 A17_DIV_MASK << A17_DIV_SHIFT |
449 MP_DIV_MASK << MP_DIV_SHIFT |
450 M0_DIV_MASK << M0_DIV_SHIFT,
451 0 << A17_DIV_SHIFT |
452 3 << MP_DIV_SHIFT |
453 1 << M0_DIV_SHIFT);
454
455 /*
456 * set up dependent divisors for L2RAM/ATCLK and PCLK clocks.
457 * l2ramclk = 900MHz, atclk = 450MHz, pclk_dbg = 450MHz
458 */
459 rk_clrsetreg(&cru->cru_clksel_con[37],
460 CLK_L2RAM_DIV_MASK << CLK_L2RAM_DIV_SHIFT |
461 ATCLK_CORE_DIV_CON_MASK << ATCLK_CORE_DIV_CON_SHIFT |
462 PCLK_CORE_DBG_DIV_MASK >> PCLK_CORE_DBG_DIV_SHIFT,
463 1 << CLK_L2RAM_DIV_SHIFT |
464 3 << ATCLK_CORE_DIV_CON_SHIFT |
465 3 << PCLK_CORE_DBG_DIV_SHIFT);
466
467 /* PLL enter normal-mode */
468 rk_clrsetreg(&cru->cru_mode_con,
469 APLL_MODE_MASK << APLL_MODE_SHIFT,
470 APLL_MODE_NORMAL << APLL_MODE_SHIFT);
471 }
472
473 /* Get pll rate by id */
474 static uint32_t rkclk_pll_get_rate(struct rk3288_cru *cru,
475 enum rk_clk_id clk_id)
476 {
477 uint32_t nr, no, nf;
478 uint32_t con;
479 int pll_id = rk_pll_id(clk_id);
480 struct rk3288_pll *pll = &cru->pll[pll_id];
481 static u8 clk_shift[CLK_COUNT] = {
482 0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT,
483 GPLL_MODE_SHIFT, NPLL_MODE_SHIFT
484 };
485 uint shift;
486
487 con = readl(&cru->cru_mode_con);
488 shift = clk_shift[clk_id];
489 switch ((con >> shift) & APLL_MODE_MASK) {
490 case APLL_MODE_SLOW:
491 return OSC_HZ;
492 case APLL_MODE_NORMAL:
493 /* normal mode */
494 con = readl(&pll->con0);
495 no = ((con >> CLKOD_SHIFT) & CLKOD_MASK) + 1;
496 nr = ((con >> CLKR_SHIFT) & CLKR_MASK) + 1;
497 con = readl(&pll->con1);
498 nf = ((con >> CLKF_SHIFT) & CLKF_MASK) + 1;
499
500 return (24 * nf / (nr * no)) * 1000000;
501 case APLL_MODE_DEEP:
502 default:
503 return 32768;
504 }
505 }
506
507 static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint gclk_rate,
508 int periph)
509 {
510 uint src_rate;
511 uint div, mux;
512 u32 con;
513
514 switch (periph) {
515 case HCLK_EMMC:
516 con = readl(&cru->cru_clksel_con[12]);
517 mux = (con >> EMMC_PLL_SHIFT) & EMMC_PLL_MASK;
518 div = (con >> EMMC_DIV_SHIFT) & EMMC_DIV_MASK;
519 break;
520 case HCLK_SDMMC:
521 con = readl(&cru->cru_clksel_con[11]);
522 mux = (con >> MMC0_PLL_SHIFT) & MMC0_PLL_MASK;
523 div = (con >> MMC0_DIV_SHIFT) & MMC0_DIV_MASK;
524 break;
525 case HCLK_SDIO0:
526 con = readl(&cru->cru_clksel_con[12]);
527 mux = (con >> SDIO0_PLL_SHIFT) & SDIO0_PLL_MASK;
528 div = (con >> SDIO0_DIV_SHIFT) & SDIO0_DIV_MASK;
529 break;
530 default:
531 return -EINVAL;
532 }
533
534 src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : gclk_rate;
535 return DIV_TO_RATE(src_rate, div);
536 }
537
538 static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint gclk_rate,
539 int periph, uint freq)
540 {
541 int src_clk_div;
542 int mux;
543
544 debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
545 src_clk_div = RATE_TO_DIV(gclk_rate, freq);
546
547 if (src_clk_div > 0x3f) {
548 src_clk_div = RATE_TO_DIV(OSC_HZ, freq);
549 mux = EMMC_PLL_SELECT_24MHZ;
550 assert((int)EMMC_PLL_SELECT_24MHZ ==
551 (int)MMC0_PLL_SELECT_24MHZ);
552 } else {
553 mux = EMMC_PLL_SELECT_GENERAL;
554 assert((int)EMMC_PLL_SELECT_GENERAL ==
555 (int)MMC0_PLL_SELECT_GENERAL);
556 }
557 switch (periph) {
558 case HCLK_EMMC:
559 rk_clrsetreg(&cru->cru_clksel_con[12],
560 EMMC_PLL_MASK << EMMC_PLL_SHIFT |
561 EMMC_DIV_MASK << EMMC_DIV_SHIFT,
562 mux << EMMC_PLL_SHIFT |
563 (src_clk_div - 1) << EMMC_DIV_SHIFT);
564 break;
565 case HCLK_SDMMC:
566 rk_clrsetreg(&cru->cru_clksel_con[11],
567 MMC0_PLL_MASK << MMC0_PLL_SHIFT |
568 MMC0_DIV_MASK << MMC0_DIV_SHIFT,
569 mux << MMC0_PLL_SHIFT |
570 (src_clk_div - 1) << MMC0_DIV_SHIFT);
571 break;
572 case HCLK_SDIO0:
573 rk_clrsetreg(&cru->cru_clksel_con[12],
574 SDIO0_PLL_MASK << SDIO0_PLL_SHIFT |
575 SDIO0_DIV_MASK << SDIO0_DIV_SHIFT,
576 mux << SDIO0_PLL_SHIFT |
577 (src_clk_div - 1) << SDIO0_DIV_SHIFT);
578 break;
579 default:
580 return -EINVAL;
581 }
582
583 return rockchip_mmc_get_clk(cru, gclk_rate, periph);
584 }
585
586 static ulong rockchip_spi_get_clk(struct rk3288_cru *cru, uint gclk_rate,
587 int periph)
588 {
589 uint div, mux;
590 u32 con;
591
592 switch (periph) {
593 case SCLK_SPI0:
594 con = readl(&cru->cru_clksel_con[25]);
595 mux = (con >> SPI0_PLL_SHIFT) & SPI0_PLL_MASK;
596 div = (con >> SPI0_DIV_SHIFT) & SPI0_DIV_MASK;
597 break;
598 case SCLK_SPI1:
599 con = readl(&cru->cru_clksel_con[25]);
600 mux = (con >> SPI1_PLL_SHIFT) & SPI1_PLL_MASK;
601 div = (con >> SPI1_DIV_SHIFT) & SPI1_DIV_MASK;
602 break;
603 case SCLK_SPI2:
604 con = readl(&cru->cru_clksel_con[39]);
605 mux = (con >> SPI2_PLL_SHIFT) & SPI2_PLL_MASK;
606 div = (con >> SPI2_DIV_SHIFT) & SPI2_DIV_MASK;
607 break;
608 default:
609 return -EINVAL;
610 }
611 assert(mux == SPI0_PLL_SELECT_GENERAL);
612
613 return DIV_TO_RATE(gclk_rate, div);
614 }
615
616 static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate,
617 int periph, uint freq)
618 {
619 int src_clk_div;
620
621 debug("%s: clk_general_rate=%u\n", __func__, gclk_rate);
622 src_clk_div = RATE_TO_DIV(gclk_rate, freq);
623 switch (periph) {
624 case SCLK_SPI0:
625 rk_clrsetreg(&cru->cru_clksel_con[25],
626 SPI0_PLL_MASK << SPI0_PLL_SHIFT |
627 SPI0_DIV_MASK << SPI0_DIV_SHIFT,
628 SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT |
629 src_clk_div << SPI0_DIV_SHIFT);
630 break;
631 case SCLK_SPI1:
632 rk_clrsetreg(&cru->cru_clksel_con[25],
633 SPI1_PLL_MASK << SPI1_PLL_SHIFT |
634 SPI1_DIV_MASK << SPI1_DIV_SHIFT,
635 SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT |
636 src_clk_div << SPI1_DIV_SHIFT);
637 break;
638 case SCLK_SPI2:
639 rk_clrsetreg(&cru->cru_clksel_con[39],
640 SPI2_PLL_MASK << SPI2_PLL_SHIFT |
641 SPI2_DIV_MASK << SPI2_DIV_SHIFT,
642 SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT |
643 src_clk_div << SPI2_DIV_SHIFT);
644 break;
645 default:
646 return -EINVAL;
647 }
648
649 return rockchip_spi_get_clk(cru, gclk_rate, periph);
650 }
651
652 static ulong rk3288_clk_get_rate(struct clk *clk)
653 {
654 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
655 ulong new_rate, gclk_rate;
656
657 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
658 switch (clk->id) {
659 case 0 ... 63:
660 new_rate = rkclk_pll_get_rate(priv->cru, clk->id);
661 break;
662 case HCLK_EMMC:
663 case HCLK_SDMMC:
664 case HCLK_SDIO0:
665 new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id);
666 break;
667 case SCLK_SPI0:
668 case SCLK_SPI1:
669 case SCLK_SPI2:
670 new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id);
671 break;
672 case PCLK_I2C0:
673 case PCLK_I2C1:
674 case PCLK_I2C2:
675 case PCLK_I2C3:
676 case PCLK_I2C4:
677 case PCLK_I2C5:
678 return gclk_rate;
679 case PCLK_PWM:
680 return PD_BUS_PCLK_HZ;
681 default:
682 return -ENOENT;
683 }
684
685 return new_rate;
686 }
687
688 static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate)
689 {
690 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
691 struct rk3288_cru *cru = priv->cru;
692 ulong new_rate, gclk_rate;
693
694 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
695 switch (clk->id) {
696 case PLL_APLL:
697 /* We only support a fixed rate here */
698 if (rate != 1800000000)
699 return -EINVAL;
700 rk3288_clk_configure_cpu(priv->cru, priv->grf);
701 new_rate = rate;
702 break;
703 case CLK_DDR:
704 new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate);
705 break;
706 case HCLK_EMMC:
707 case HCLK_SDMMC:
708 case HCLK_SDIO0:
709 new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate);
710 break;
711 case SCLK_SPI0:
712 case SCLK_SPI1:
713 case SCLK_SPI2:
714 new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate);
715 break;
716 #ifndef CONFIG_SPL_BUILD
717 case SCLK_MAC:
718 new_rate = rockchip_mac_set_clk(priv->cru, clk->id, rate);
719 break;
720 case DCLK_VOP0:
721 case DCLK_VOP1:
722 new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate);
723 break;
724 case SCLK_EDP_24M:
725 /* clk_edp_24M source: 24M */
726 rk_setreg(&cru->cru_clksel_con[28], 1 << 15);
727
728 /* rst edp */
729 rk_setreg(&cru->cru_clksel_con[6], 1 << 15);
730 udelay(1);
731 rk_clrreg(&cru->cru_clksel_con[6], 1 << 15);
732 new_rate = rate;
733 break;
734 case ACLK_VOP0:
735 case ACLK_VOP1: {
736 u32 div;
737
738 /* vop aclk source clk: cpll */
739 div = CPLL_HZ / rate;
740 assert((div - 1 < 64) && (div * rate == CPLL_HZ));
741
742 switch (clk->id) {
743 case ACLK_VOP0:
744 rk_clrsetreg(&cru->cru_clksel_con[31],
745 3 << 6 | 0x1f << 0,
746 0 << 6 | (div - 1) << 0);
747 break;
748 case ACLK_VOP1:
749 rk_clrsetreg(&cru->cru_clksel_con[31],
750 3 << 14 | 0x1f << 8,
751 0 << 14 | (div - 1) << 8);
752 break;
753 }
754 new_rate = rate;
755 break;
756 }
757 case PCLK_HDMI_CTRL:
758 /* enable pclk hdmi ctrl */
759 rk_clrreg(&cru->cru_clkgate_con[16], 1 << 9);
760
761 /* software reset hdmi */
762 rk_setreg(&cru->cru_clkgate_con[7], 1 << 9);
763 udelay(1);
764 rk_clrreg(&cru->cru_clkgate_con[7], 1 << 9);
765 new_rate = rate;
766 break;
767 #endif
768 default:
769 return -ENOENT;
770 }
771
772 return new_rate;
773 }
774
775 static struct clk_ops rk3288_clk_ops = {
776 .get_rate = rk3288_clk_get_rate,
777 .set_rate = rk3288_clk_set_rate,
778 };
779
780 static int rk3288_clk_ofdata_to_platdata(struct udevice *dev)
781 {
782 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
783 struct rk3288_clk_priv *priv = dev_get_priv(dev);
784
785 priv->cru = (struct rk3288_cru *)dev_get_addr(dev);
786 #endif
787
788 return 0;
789 }
790
791 static int rk3288_clk_probe(struct udevice *dev)
792 {
793 struct rk3288_clk_priv *priv = dev_get_priv(dev);
794
795 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
796 if (IS_ERR(priv->grf))
797 return PTR_ERR(priv->grf);
798 #ifdef CONFIG_SPL_BUILD
799 #if CONFIG_IS_ENABLED(OF_PLATDATA)
800 struct rk3288_clk_plat *plat = dev_get_platdata(dev);
801
802 priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]);
803 #endif
804 rkclk_init(priv->cru, priv->grf);
805 #endif
806
807 return 0;
808 }
809
810 static int rk3288_clk_bind(struct udevice *dev)
811 {
812 int ret;
813
814 /* The reset driver does not have a device node, so bind it here */
815 ret = device_bind_driver(gd->dm_root, "rk3288_sysreset", "reset", &dev);
816 if (ret)
817 debug("Warning: No RK3288 reset driver: ret=%d\n", ret);
818
819 return 0;
820 }
821
822 static const struct udevice_id rk3288_clk_ids[] = {
823 { .compatible = "rockchip,rk3288-cru" },
824 { }
825 };
826
827 U_BOOT_DRIVER(rockchip_rk3288_cru) = {
828 .name = "rockchip_rk3288_cru",
829 .id = UCLASS_CLK,
830 .of_match = rk3288_clk_ids,
831 .priv_auto_alloc_size = sizeof(struct rk3288_clk_priv),
832 .platdata_auto_alloc_size = sizeof(struct rk3288_clk_plat),
833 .ops = &rk3288_clk_ops,
834 .bind = rk3288_clk_bind,
835 .ofdata_to_platdata = rk3288_clk_ofdata_to_platdata,
836 .probe = rk3288_clk_probe,
837 };
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