1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * (C) Copyright 2017-2019 Rockchip Electronics Co., Ltd
4 */
5 #include <common.h>
6 #include <bitfield.h>
7 #include <clk-uclass.h>
8 #include <dm.h>
9 #include <div64.h>
10 #include <errno.h>
11 #include <log.h>
12 #include <malloc.h>
13 #include <syscon.h>
14 #include <asm/global_data.h>
15 #include <asm/io.h>
16 #include <asm/arch/cru_rk3308.h>
17 #include <asm/arch-rockchip/clock.h>
18 #include <asm/arch-rockchip/hardware.h>
19 #include <dm/device-internal.h>
20 #include <dm/lists.h>
21 #include <dt-bindings/clock/rk3308-cru.h>
22 #include <linux/bitops.h>
23
24 DECLARE_GLOBAL_DATA_PTR;
25
26 enum {
27 VCO_MAX_HZ = 3200U * 1000000,
28 VCO_MIN_HZ = 800 * 1000000,
29 OUTPUT_MAX_HZ = 3200U * 1000000,
30 OUTPUT_MIN_HZ = 24 * 1000000,
31 };
32
33 #define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1))
34
35 #define RK3308_CPUCLK_RATE(_rate, _aclk_div, _pclk_div) \
36 { \
37 .rate = _rate##U, \
38 .aclk_div = _aclk_div, \
39 .pclk_div = _pclk_div, \
40 }
41
42 static struct rockchip_pll_rate_table rk3308_pll_rates[] = {
43 /* _mhz, _refdiv, _fbdiv, _postdiv1, _postdiv2, _dsmpd, _frac */
44 RK3036_PLL_RATE(1300000000, 6, 325, 1, 1, 1, 0),
45 RK3036_PLL_RATE(1200000000, 1, 50, 1, 1, 1, 0),
46 RK3036_PLL_RATE(816000000, 1, 68, 2, 1, 1, 0),
47 RK3036_PLL_RATE(748000000, 2, 187, 3, 1, 1, 0),
48 };
49
50 static struct rockchip_cpu_rate_table rk3308_cpu_rates[] = {
51 RK3308_CPUCLK_RATE(1200000000, 1, 5),
52 RK3308_CPUCLK_RATE(1008000000, 1, 5),
53 RK3308_CPUCLK_RATE(816000000, 1, 3),
54 RK3308_CPUCLK_RATE(600000000, 1, 3),
55 RK3308_CPUCLK_RATE(408000000, 1, 1),
56 };
57
58 static struct rockchip_pll_clock rk3308_pll_clks[] = {
59 [APLL] = PLL(pll_rk3328, PLL_APLL, RK3308_PLL_CON(0),
60 RK3308_MODE_CON, 0, 10, 0, rk3308_pll_rates),
61 [DPLL] = PLL(pll_rk3328, PLL_DPLL, RK3308_PLL_CON(8),
62 RK3308_MODE_CON, 2, 10, 0, NULL),
63 [VPLL0] = PLL(pll_rk3328, PLL_VPLL0, RK3308_PLL_CON(16),
64 RK3308_MODE_CON, 4, 10, 0, NULL),
65 [VPLL1] = PLL(pll_rk3328, PLL_VPLL1, RK3308_PLL_CON(24),
66 RK3308_MODE_CON, 6, 10, 0, NULL),
67 };
68
rk3308_armclk_set_clk(struct rk3308_clk_priv * priv,ulong hz)69 static ulong rk3308_armclk_set_clk(struct rk3308_clk_priv *priv, ulong hz)
70 {
71 struct rk3308_cru *cru = priv->cru;
72 const struct rockchip_cpu_rate_table *rate;
73 ulong old_rate;
74
75 rate = rockchip_get_cpu_settings(rk3308_cpu_rates, hz);
76 if (!rate) {
77 printf("%s unsupport rate\n", __func__);
78 return -EINVAL;
79 }
80
81 /*
82 * select apll as cpu/core clock pll source and
83 * set up dependent divisors for PERI and ACLK clocks.
84 * core hz : apll = 1:1
85 */
86 old_rate = rockchip_pll_get_rate(&rk3308_pll_clks[APLL],
87 priv->cru, APLL);
88 if (old_rate > hz) {
89 if (rockchip_pll_set_rate(&rk3308_pll_clks[APLL],
90 priv->cru, APLL, hz))
91 return -EINVAL;
92 rk_clrsetreg(&cru->clksel_con[0],
93 CORE_CLK_PLL_SEL_MASK | CORE_DIV_CON_MASK |
94 CORE_ACLK_DIV_MASK | CORE_DBG_DIV_MASK,
95 rate->aclk_div << CORE_ACLK_DIV_SHIFT |
96 rate->pclk_div << CORE_DBG_DIV_SHIFT |
97 CORE_CLK_PLL_SEL_APLL << CORE_CLK_PLL_SEL_SHIFT |
98 0 << CORE_DIV_CON_SHIFT);
99 } else if (old_rate < hz) {
100 rk_clrsetreg(&cru->clksel_con[0],
101 CORE_CLK_PLL_SEL_MASK | CORE_DIV_CON_MASK |
102 CORE_ACLK_DIV_MASK | CORE_DBG_DIV_MASK,
103 rate->aclk_div << CORE_ACLK_DIV_SHIFT |
104 rate->pclk_div << CORE_DBG_DIV_SHIFT |
105 CORE_CLK_PLL_SEL_APLL << CORE_CLK_PLL_SEL_SHIFT |
106 0 << CORE_DIV_CON_SHIFT);
107 if (rockchip_pll_set_rate(&rk3308_pll_clks[APLL],
108 priv->cru, APLL, hz))
109 return -EINVAL;
110 }
111
112 return rockchip_pll_get_rate(&rk3308_pll_clks[APLL], priv->cru, APLL);
113 }
114
rk3308_clk_get_pll_rate(struct rk3308_clk_priv * priv)115 static void rk3308_clk_get_pll_rate(struct rk3308_clk_priv *priv)
116 {
117 if (!priv->dpll_hz)
118 priv->dpll_hz = rockchip_pll_get_rate(&rk3308_pll_clks[DPLL],
119 priv->cru, DPLL);
120 if (!priv->vpll0_hz)
121 priv->vpll0_hz = rockchip_pll_get_rate(&rk3308_pll_clks[VPLL0],
122 priv->cru, VPLL0);
123 if (!priv->vpll1_hz)
124 priv->vpll1_hz = rockchip_pll_get_rate(&rk3308_pll_clks[VPLL1],
125 priv->cru, VPLL1);
126 }
127
rk3308_i2c_get_clk(struct clk * clk)128 static ulong rk3308_i2c_get_clk(struct clk *clk)
129 {
130 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
131 struct rk3308_cru *cru = priv->cru;
132 u32 div, con, con_id;
133
134 switch (clk->id) {
135 case SCLK_I2C0:
136 con_id = 25;
137 break;
138 case SCLK_I2C1:
139 con_id = 26;
140 break;
141 case SCLK_I2C2:
142 con_id = 27;
143 break;
144 case SCLK_I2C3:
145 con_id = 28;
146 break;
147 default:
148 printf("do not support this i2c bus\n");
149 return -EINVAL;
150 }
151
152 con = readl(&cru->clksel_con[con_id]);
153 div = con >> CLK_I2C_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
154
155 return DIV_TO_RATE(priv->dpll_hz, div);
156 }
157
rk3308_i2c_set_clk(struct clk * clk,uint hz)158 static ulong rk3308_i2c_set_clk(struct clk *clk, uint hz)
159 {
160 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
161 struct rk3308_cru *cru = priv->cru;
162 u32 src_clk_div, con_id;
163
164 src_clk_div = DIV_ROUND_UP(priv->dpll_hz, hz);
165 assert(src_clk_div - 1 <= 127);
166
167 switch (clk->id) {
168 case SCLK_I2C0:
169 con_id = 25;
170 break;
171 case SCLK_I2C1:
172 con_id = 26;
173 break;
174 case SCLK_I2C2:
175 con_id = 27;
176 break;
177 case SCLK_I2C3:
178 con_id = 28;
179 break;
180 default:
181 printf("do not support this i2c bus\n");
182 return -EINVAL;
183 }
184 rk_clrsetreg(&cru->clksel_con[con_id],
185 CLK_I2C_PLL_SEL_MASK | CLK_I2C_DIV_CON_MASK,
186 CLK_I2C_PLL_SEL_DPLL << CLK_I2C_PLL_SEL_SHIFT |
187 (src_clk_div - 1) << CLK_I2C_DIV_CON_SHIFT);
188
189 return rk3308_i2c_get_clk(clk);
190 }
191
rk3308_mac_set_clk(struct clk * clk,uint hz)192 static ulong rk3308_mac_set_clk(struct clk *clk, uint hz)
193 {
194 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
195 struct rk3308_cru *cru = priv->cru;
196 u32 con = readl(&cru->clksel_con[43]);
197 ulong pll_rate;
198 u8 div;
199
200 if ((con >> MAC_PLL_SHIFT) & MAC_SEL_VPLL0)
201 pll_rate = rockchip_pll_get_rate(&rk3308_pll_clks[VPLL0],
202 priv->cru, VPLL0);
203 else if ((con >> MAC_PLL_SHIFT) & MAC_SEL_VPLL1)
204 pll_rate = rockchip_pll_get_rate(&rk3308_pll_clks[VPLL1],
205 priv->cru, VPLL1);
206 else
207 pll_rate = rockchip_pll_get_rate(&rk3308_pll_clks[DPLL],
208 priv->cru, DPLL);
209
210 /*default set 50MHZ for gmac*/
211 if (!hz)
212 hz = 50000000;
213
214 div = DIV_ROUND_UP(pll_rate, hz) - 1;
215 assert(div < 32);
216 rk_clrsetreg(&cru->clksel_con[43], MAC_DIV_MASK,
217 div << MAC_DIV_SHIFT);
218
219 return DIV_TO_RATE(pll_rate, div);
220 }
221
rk3308_mac_set_speed_clk(struct clk * clk,uint hz)222 static int rk3308_mac_set_speed_clk(struct clk *clk, uint hz)
223 {
224 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
225 struct rk3308_cru *cru = priv->cru;
226
227 if (hz != 2500000 && hz != 25000000) {
228 debug("Unsupported mac speed:%d\n", hz);
229 return -EINVAL;
230 }
231
232 rk_clrsetreg(&cru->clksel_con[43], MAC_CLK_SPEED_SEL_MASK,
233 ((hz == 2500000) ? 0 : 1) << MAC_CLK_SPEED_SEL_SHIFT);
234
235 return 0;
236 }
237
rk3308_mmc_get_clk(struct clk * clk)238 static ulong rk3308_mmc_get_clk(struct clk *clk)
239 {
240 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
241 struct rk3308_cru *cru = priv->cru;
242 u32 div, con, con_id;
243
244 switch (clk->id) {
245 case HCLK_SDMMC:
246 case SCLK_SDMMC:
247 con_id = 39;
248 break;
249 case HCLK_EMMC:
250 case SCLK_EMMC:
251 case SCLK_EMMC_SAMPLE:
252 con_id = 41;
253 break;
254 default:
255 return -EINVAL;
256 }
257
258 con = readl(&cru->clksel_con[con_id]);
259 div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT;
260
261 if ((con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT
262 == EMMC_SEL_24M)
263 return DIV_TO_RATE(OSC_HZ, div) / 2;
264 else
265 return DIV_TO_RATE(priv->vpll0_hz, div) / 2;
266 }
267
rk3308_mmc_set_clk(struct clk * clk,ulong set_rate)268 static ulong rk3308_mmc_set_clk(struct clk *clk, ulong set_rate)
269 {
270 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
271 struct rk3308_cru *cru = priv->cru;
272 int src_clk_div;
273 u32 con_id;
274
275 switch (clk->id) {
276 case HCLK_SDMMC:
277 case SCLK_SDMMC:
278 con_id = 39;
279 break;
280 case HCLK_EMMC:
281 case SCLK_EMMC:
282 con_id = 41;
283 break;
284 default:
285 return -EINVAL;
286 }
287 /* Select clk_sdmmc/emmc source from VPLL0 by default */
288 /* mmc clock defaulg div 2 internal, need provide double in cru */
289 src_clk_div = DIV_ROUND_UP(priv->vpll0_hz / 2, set_rate);
290
291 if (src_clk_div > 127) {
292 /* use 24MHz source for 400KHz clock */
293 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate);
294 rk_clrsetreg(&cru->clksel_con[con_id],
295 EMMC_PLL_MASK | EMMC_DIV_MASK | EMMC_CLK_SEL_MASK,
296 EMMC_CLK_SEL_EMMC << EMMC_CLK_SEL_SHIFT |
297 EMMC_SEL_24M << EMMC_PLL_SHIFT |
298 (src_clk_div - 1) << EMMC_DIV_SHIFT);
299 } else {
300 rk_clrsetreg(&cru->clksel_con[con_id],
301 EMMC_PLL_MASK | EMMC_DIV_MASK | EMMC_CLK_SEL_MASK,
302 EMMC_CLK_SEL_EMMC << EMMC_CLK_SEL_SHIFT |
303 EMMC_SEL_VPLL0 << EMMC_PLL_SHIFT |
304 (src_clk_div - 1) << EMMC_DIV_SHIFT);
305 }
306
307 return rk3308_mmc_get_clk(clk);
308 }
309
rk3308_saradc_get_clk(struct clk * clk)310 static ulong rk3308_saradc_get_clk(struct clk *clk)
311 {
312 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
313 struct rk3308_cru *cru = priv->cru;
314 u32 div, con;
315
316 con = readl(&cru->clksel_con[34]);
317 div = con >> CLK_SARADC_DIV_CON_SHIFT & CLK_SARADC_DIV_CON_MASK;
318
319 return DIV_TO_RATE(OSC_HZ, div);
320 }
321
rk3308_saradc_set_clk(struct clk * clk,uint hz)322 static ulong rk3308_saradc_set_clk(struct clk *clk, uint hz)
323 {
324 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
325 struct rk3308_cru *cru = priv->cru;
326 int src_clk_div;
327
328 src_clk_div = DIV_ROUND_UP(OSC_HZ, hz);
329 assert(src_clk_div - 1 <= 2047);
330
331 rk_clrsetreg(&cru->clksel_con[34],
332 CLK_SARADC_DIV_CON_MASK,
333 (src_clk_div - 1) << CLK_SARADC_DIV_CON_SHIFT);
334
335 return rk3308_saradc_get_clk(clk);
336 }
337
rk3308_tsadc_get_clk(struct clk * clk)338 static ulong rk3308_tsadc_get_clk(struct clk *clk)
339 {
340 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
341 struct rk3308_cru *cru = priv->cru;
342 u32 div, con;
343
344 con = readl(&cru->clksel_con[33]);
345 div = con >> CLK_SARADC_DIV_CON_SHIFT & CLK_SARADC_DIV_CON_MASK;
346
347 return DIV_TO_RATE(OSC_HZ, div);
348 }
349
rk3308_tsadc_set_clk(struct clk * clk,uint hz)350 static ulong rk3308_tsadc_set_clk(struct clk *clk, uint hz)
351 {
352 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
353 struct rk3308_cru *cru = priv->cru;
354 int src_clk_div;
355
356 src_clk_div = DIV_ROUND_UP(OSC_HZ, hz);
357 assert(src_clk_div - 1 <= 2047);
358
359 rk_clrsetreg(&cru->clksel_con[33],
360 CLK_SARADC_DIV_CON_MASK,
361 (src_clk_div - 1) << CLK_SARADC_DIV_CON_SHIFT);
362
363 return rk3308_tsadc_get_clk(clk);
364 }
365
rk3308_spi_get_clk(struct clk * clk)366 static ulong rk3308_spi_get_clk(struct clk *clk)
367 {
368 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
369 struct rk3308_cru *cru = priv->cru;
370 u32 div, con, con_id;
371
372 switch (clk->id) {
373 case SCLK_SPI0:
374 con_id = 30;
375 break;
376 case SCLK_SPI1:
377 con_id = 31;
378 break;
379 case SCLK_SPI2:
380 con_id = 32;
381 break;
382 default:
383 printf("do not support this spi bus\n");
384 return -EINVAL;
385 }
386
387 con = readl(&cru->clksel_con[con_id]);
388 div = con >> CLK_SPI_DIV_CON_SHIFT & CLK_SPI_DIV_CON_MASK;
389
390 return DIV_TO_RATE(priv->dpll_hz, div);
391 }
392
rk3308_spi_set_clk(struct clk * clk,uint hz)393 static ulong rk3308_spi_set_clk(struct clk *clk, uint hz)
394 {
395 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
396 struct rk3308_cru *cru = priv->cru;
397 u32 src_clk_div, con_id;
398
399 src_clk_div = DIV_ROUND_UP(priv->dpll_hz, hz);
400 assert(src_clk_div - 1 <= 127);
401
402 switch (clk->id) {
403 case SCLK_SPI0:
404 con_id = 30;
405 break;
406 case SCLK_SPI1:
407 con_id = 31;
408 break;
409 case SCLK_SPI2:
410 con_id = 32;
411 break;
412 default:
413 printf("do not support this spi bus\n");
414 return -EINVAL;
415 }
416
417 rk_clrsetreg(&cru->clksel_con[con_id],
418 CLK_SPI_PLL_SEL_MASK | CLK_SPI_DIV_CON_MASK,
419 CLK_SPI_PLL_SEL_DPLL << CLK_SPI_PLL_SEL_SHIFT |
420 (src_clk_div - 1) << CLK_SPI_DIV_CON_SHIFT);
421
422 return rk3308_spi_get_clk(clk);
423 }
424
rk3308_pwm_get_clk(struct clk * clk)425 static ulong rk3308_pwm_get_clk(struct clk *clk)
426 {
427 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
428 struct rk3308_cru *cru = priv->cru;
429 u32 div, con;
430
431 con = readl(&cru->clksel_con[29]);
432 div = con >> CLK_PWM_DIV_CON_SHIFT & CLK_PWM_DIV_CON_MASK;
433
434 return DIV_TO_RATE(priv->dpll_hz, div);
435 }
436
rk3308_pwm_set_clk(struct clk * clk,uint hz)437 static ulong rk3308_pwm_set_clk(struct clk *clk, uint hz)
438 {
439 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
440 struct rk3308_cru *cru = priv->cru;
441 int src_clk_div;
442
443 src_clk_div = DIV_ROUND_UP(priv->dpll_hz, hz);
444 assert(src_clk_div - 1 <= 127);
445
446 rk_clrsetreg(&cru->clksel_con[29],
447 CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK,
448 CLK_PWM_PLL_SEL_DPLL << CLK_PWM_PLL_SEL_SHIFT |
449 (src_clk_div - 1) << CLK_PWM_DIV_CON_SHIFT);
450
451 return rk3308_pwm_get_clk(clk);
452 }
453
rk3308_vop_get_clk(struct clk * clk)454 static ulong rk3308_vop_get_clk(struct clk *clk)
455 {
456 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
457 struct rk3308_cru *cru = priv->cru;
458 u32 div, pll_sel, vol_sel, con, parent;
459
460 con = readl(&cru->clksel_con[8]);
461 vol_sel = (con & DCLK_VOP_SEL_MASK) >> DCLK_VOP_SEL_SHIFT;
462 pll_sel = (con & DCLK_VOP_PLL_SEL_MASK) >> DCLK_VOP_PLL_SEL_SHIFT;
463 div = con & DCLK_VOP_DIV_MASK;
464
465 if (vol_sel == DCLK_VOP_SEL_24M) {
466 parent = OSC_HZ;
467 } else if (vol_sel == DCLK_VOP_SEL_DIVOUT) {
468 switch (pll_sel) {
469 case DCLK_VOP_PLL_SEL_DPLL:
470 parent = priv->dpll_hz;
471 break;
472 case DCLK_VOP_PLL_SEL_VPLL0:
473 parent = priv->vpll0_hz;
474 break;
475 case DCLK_VOP_PLL_SEL_VPLL1:
476 parent = priv->vpll0_hz;
477 break;
478 default:
479 printf("do not support this vop pll sel\n");
480 return -EINVAL;
481 }
482 } else {
483 printf("do not support this vop sel\n");
484 return -EINVAL;
485 }
486
487 return DIV_TO_RATE(parent, div);
488 }
489
rk3308_vop_set_clk(struct clk * clk,ulong hz)490 static ulong rk3308_vop_set_clk(struct clk *clk, ulong hz)
491 {
492 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
493 struct rk3308_cru *cru = priv->cru;
494 ulong pll_rate, now, best_rate = 0;
495 u32 i, div, best_div = 0, best_sel = 0;
496
497 for (i = 0; i <= DCLK_VOP_PLL_SEL_VPLL1; i++) {
498 switch (i) {
499 case DCLK_VOP_PLL_SEL_DPLL:
500 pll_rate = priv->dpll_hz;
501 break;
502 case DCLK_VOP_PLL_SEL_VPLL0:
503 pll_rate = priv->vpll0_hz;
504 break;
505 case DCLK_VOP_PLL_SEL_VPLL1:
506 pll_rate = priv->vpll1_hz;
507 break;
508 default:
509 printf("do not support this vop pll sel\n");
510 return -EINVAL;
511 }
512
513 div = DIV_ROUND_UP(pll_rate, hz);
514 if (div > 255)
515 continue;
516 now = pll_rate / div;
517 if (abs(hz - now) < abs(hz - best_rate)) {
518 best_rate = now;
519 best_div = div;
520 best_sel = i;
521 }
522 debug("pll_rate=%lu, best_rate=%lu, best_div=%u, best_sel=%u\n",
523 pll_rate, best_rate, best_div, best_sel);
524 }
525
526 if (best_rate != hz && hz == OSC_HZ) {
527 rk_clrsetreg(&cru->clksel_con[8],
528 DCLK_VOP_SEL_MASK,
529 DCLK_VOP_SEL_24M << DCLK_VOP_SEL_SHIFT);
530 } else if (best_rate) {
531 rk_clrsetreg(&cru->clksel_con[8],
532 DCLK_VOP_SEL_MASK | DCLK_VOP_PLL_SEL_MASK |
533 DCLK_VOP_DIV_MASK,
534 DCLK_VOP_SEL_DIVOUT << DCLK_VOP_SEL_SHIFT |
535 best_sel << DCLK_VOP_PLL_SEL_SHIFT |
536 (best_div - 1) << DCLK_VOP_DIV_SHIFT);
537 } else {
538 printf("do not support this vop freq\n");
539 return -EINVAL;
540 }
541
542 return rk3308_vop_get_clk(clk);
543 }
544
rk3308_bus_get_clk(struct rk3308_clk_priv * priv,ulong clk_id)545 static ulong rk3308_bus_get_clk(struct rk3308_clk_priv *priv, ulong clk_id)
546 {
547 struct rk3308_cru *cru = priv->cru;
548 u32 div, con, parent = priv->dpll_hz;
549
550 switch (clk_id) {
551 case ACLK_BUS:
552 con = readl(&cru->clksel_con[5]);
553 div = (con & BUS_ACLK_DIV_MASK) >> BUS_ACLK_DIV_SHIFT;
554 break;
555 case HCLK_BUS:
556 con = readl(&cru->clksel_con[6]);
557 div = (con & BUS_HCLK_DIV_MASK) >> BUS_HCLK_DIV_SHIFT;
558 break;
559 case PCLK_BUS:
560 case PCLK_WDT:
561 con = readl(&cru->clksel_con[6]);
562 div = (con & BUS_PCLK_DIV_MASK) >> BUS_PCLK_DIV_SHIFT;
563 break;
564 default:
565 return -ENOENT;
566 }
567
568 return DIV_TO_RATE(parent, div);
569 }
570
rk3308_bus_set_clk(struct rk3308_clk_priv * priv,ulong clk_id,ulong hz)571 static ulong rk3308_bus_set_clk(struct rk3308_clk_priv *priv, ulong clk_id,
572 ulong hz)
573 {
574 struct rk3308_cru *cru = priv->cru;
575 int src_clk_div;
576
577 src_clk_div = DIV_ROUND_UP(priv->dpll_hz, hz);
578 assert(src_clk_div - 1 <= 31);
579
580 /*
581 * select dpll as pd_bus bus clock source and
582 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
583 */
584 switch (clk_id) {
585 case ACLK_BUS:
586 rk_clrsetreg(&cru->clksel_con[5],
587 BUS_PLL_SEL_MASK | BUS_ACLK_DIV_MASK,
588 BUS_PLL_SEL_DPLL << BUS_PLL_SEL_SHIFT |
589 (src_clk_div - 1) << BUS_ACLK_DIV_SHIFT);
590 break;
591 case HCLK_BUS:
592 rk_clrsetreg(&cru->clksel_con[6],
593 BUS_HCLK_DIV_MASK,
594 (src_clk_div - 1) << BUS_HCLK_DIV_SHIFT);
595 break;
596 case PCLK_BUS:
597 rk_clrsetreg(&cru->clksel_con[6],
598 BUS_PCLK_DIV_MASK,
599 (src_clk_div - 1) << BUS_PCLK_DIV_SHIFT);
600 break;
601 default:
602 printf("do not support this bus freq\n");
603 return -EINVAL;
604 }
605
606 return rk3308_bus_get_clk(priv, clk_id);
607 }
608
rk3308_peri_get_clk(struct rk3308_clk_priv * priv,ulong clk_id)609 static ulong rk3308_peri_get_clk(struct rk3308_clk_priv *priv, ulong clk_id)
610 {
611 struct rk3308_cru *cru = priv->cru;
612 u32 div, con, parent = priv->dpll_hz;
613
614 switch (clk_id) {
615 case ACLK_PERI:
616 con = readl(&cru->clksel_con[36]);
617 div = (con & PERI_ACLK_DIV_MASK) >> PERI_ACLK_DIV_SHIFT;
618 break;
619 case HCLK_PERI:
620 con = readl(&cru->clksel_con[37]);
621 div = (con & PERI_HCLK_DIV_MASK) >> PERI_HCLK_DIV_SHIFT;
622 break;
623 case PCLK_PERI:
624 con = readl(&cru->clksel_con[37]);
625 div = (con & PERI_PCLK_DIV_MASK) >> PERI_PCLK_DIV_SHIFT;
626 break;
627 default:
628 return -ENOENT;
629 }
630
631 return DIV_TO_RATE(parent, div);
632 }
633
rk3308_peri_set_clk(struct rk3308_clk_priv * priv,ulong clk_id,ulong hz)634 static ulong rk3308_peri_set_clk(struct rk3308_clk_priv *priv, ulong clk_id,
635 ulong hz)
636 {
637 struct rk3308_cru *cru = priv->cru;
638 int src_clk_div;
639
640 src_clk_div = DIV_ROUND_UP(priv->dpll_hz, hz);
641 assert(src_clk_div - 1 <= 31);
642
643 /*
644 * select dpll as pd_peri bus clock source and
645 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
646 */
647 switch (clk_id) {
648 case ACLK_PERI:
649 rk_clrsetreg(&cru->clksel_con[36],
650 PERI_PLL_SEL_MASK | PERI_ACLK_DIV_MASK,
651 PERI_PLL_DPLL << PERI_PLL_SEL_SHIFT |
652 (src_clk_div - 1) << PERI_ACLK_DIV_SHIFT);
653 break;
654 case HCLK_PERI:
655 rk_clrsetreg(&cru->clksel_con[37],
656 PERI_HCLK_DIV_MASK,
657 (src_clk_div - 1) << PERI_HCLK_DIV_SHIFT);
658 break;
659 case PCLK_PERI:
660 rk_clrsetreg(&cru->clksel_con[37],
661 PERI_PCLK_DIV_MASK,
662 (src_clk_div - 1) << PERI_PCLK_DIV_SHIFT);
663 break;
664 default:
665 printf("do not support this peri freq\n");
666 return -EINVAL;
667 }
668
669 return rk3308_peri_get_clk(priv, clk_id);
670 }
671
rk3308_audio_get_clk(struct rk3308_clk_priv * priv,ulong clk_id)672 static ulong rk3308_audio_get_clk(struct rk3308_clk_priv *priv, ulong clk_id)
673 {
674 struct rk3308_cru *cru = priv->cru;
675 u32 div, con, parent = priv->vpll0_hz;
676
677 switch (clk_id) {
678 case HCLK_AUDIO:
679 con = readl(&cru->clksel_con[45]);
680 div = (con & AUDIO_HCLK_DIV_MASK) >> AUDIO_HCLK_DIV_SHIFT;
681 break;
682 case PCLK_AUDIO:
683 con = readl(&cru->clksel_con[45]);
684 div = (con & AUDIO_PCLK_DIV_MASK) >> AUDIO_PCLK_DIV_SHIFT;
685 break;
686 default:
687 return -ENOENT;
688 }
689
690 return DIV_TO_RATE(parent, div);
691 }
692
rk3308_audio_set_clk(struct rk3308_clk_priv * priv,ulong clk_id,ulong hz)693 static ulong rk3308_audio_set_clk(struct rk3308_clk_priv *priv, ulong clk_id,
694 ulong hz)
695 {
696 struct rk3308_cru *cru = priv->cru;
697 int src_clk_div;
698
699 src_clk_div = DIV_ROUND_UP(priv->vpll0_hz, hz);
700 assert(src_clk_div - 1 <= 31);
701
702 /*
703 * select vpll0 as audio bus clock source and
704 * set up dependent divisors for HCLK and PCLK clocks.
705 */
706 switch (clk_id) {
707 case HCLK_AUDIO:
708 rk_clrsetreg(&cru->clksel_con[45],
709 AUDIO_PLL_SEL_MASK | AUDIO_HCLK_DIV_MASK,
710 AUDIO_PLL_VPLL0 << AUDIO_PLL_SEL_SHIFT |
711 (src_clk_div - 1) << AUDIO_HCLK_DIV_SHIFT);
712 break;
713 case PCLK_AUDIO:
714 rk_clrsetreg(&cru->clksel_con[45],
715 AUDIO_PLL_SEL_MASK | AUDIO_PCLK_DIV_MASK,
716 AUDIO_PLL_VPLL0 << AUDIO_PLL_SEL_SHIFT |
717 (src_clk_div - 1) << AUDIO_PCLK_DIV_SHIFT);
718 break;
719 default:
720 printf("do not support this audio freq\n");
721 return -EINVAL;
722 }
723
724 return rk3308_peri_get_clk(priv, clk_id);
725 }
726
rk3308_crypto_get_clk(struct rk3308_clk_priv * priv,ulong clk_id)727 static ulong rk3308_crypto_get_clk(struct rk3308_clk_priv *priv, ulong clk_id)
728 {
729 struct rk3308_cru *cru = priv->cru;
730 u32 div, con, parent;
731
732 switch (clk_id) {
733 case SCLK_CRYPTO:
734 con = readl(&cru->clksel_con[7]);
735 div = (con & CRYPTO_DIV_MASK) >> CRYPTO_DIV_SHIFT;
736 parent = priv->vpll0_hz;
737 break;
738 case SCLK_CRYPTO_APK:
739 con = readl(&cru->clksel_con[7]);
740 div = (con & CRYPTO_APK_DIV_MASK) >> CRYPTO_APK_DIV_SHIFT;
741 parent = priv->vpll0_hz;
742 break;
743 default:
744 return -ENOENT;
745 }
746
747 return DIV_TO_RATE(parent, div);
748 }
749
rk3308_crypto_set_clk(struct rk3308_clk_priv * priv,ulong clk_id,ulong hz)750 static ulong rk3308_crypto_set_clk(struct rk3308_clk_priv *priv, ulong clk_id,
751 ulong hz)
752 {
753 struct rk3308_cru *cru = priv->cru;
754 int src_clk_div;
755
756 src_clk_div = DIV_ROUND_UP(priv->vpll0_hz, hz);
757 assert(src_clk_div - 1 <= 31);
758
759 /*
760 * select gpll as crypto clock source and
761 * set up dependent divisors for crypto clocks.
762 */
763 switch (clk_id) {
764 case SCLK_CRYPTO:
765 rk_clrsetreg(&cru->clksel_con[7],
766 CRYPTO_PLL_SEL_MASK | CRYPTO_DIV_MASK,
767 CRYPTO_PLL_SEL_VPLL0 << CRYPTO_PLL_SEL_SHIFT |
768 (src_clk_div - 1) << CRYPTO_DIV_SHIFT);
769 break;
770 case SCLK_CRYPTO_APK:
771 rk_clrsetreg(&cru->clksel_con[7],
772 CRYPTO_APK_PLL_SEL_MASK | CRYPTO_APK_DIV_MASK,
773 CRYPTO_PLL_SEL_VPLL0 << CRYPTO_APK_SEL_SHIFT |
774 (src_clk_div - 1) << CRYPTO_APK_DIV_SHIFT);
775 break;
776 default:
777 printf("do not support this peri freq\n");
778 return -EINVAL;
779 }
780
781 return rk3308_crypto_get_clk(priv, clk_id);
782 }
783
rk3308_clk_get_rate(struct clk * clk)784 static ulong rk3308_clk_get_rate(struct clk *clk)
785 {
786 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
787 ulong rate = 0;
788
789 debug("%s id:%ld\n", __func__, clk->id);
790
791 switch (clk->id) {
792 case PLL_APLL:
793 case ARMCLK:
794 rate = rockchip_pll_get_rate(&rk3308_pll_clks[APLL],
795 priv->cru, APLL);
796 break;
797 case PLL_DPLL:
798 rate = rockchip_pll_get_rate(&rk3308_pll_clks[DPLL],
799 priv->cru, DPLL);
800 break;
801 case PLL_VPLL0:
802 rate = rockchip_pll_get_rate(&rk3308_pll_clks[VPLL0],
803 priv->cru, VPLL0);
804 break;
805 case PLL_VPLL1:
806 rate = rockchip_pll_get_rate(&rk3308_pll_clks[VPLL1],
807 priv->cru, VPLL1);
808 break;
809 case HCLK_SDMMC:
810 case HCLK_EMMC:
811 case SCLK_SDMMC:
812 case SCLK_EMMC:
813 case SCLK_EMMC_SAMPLE:
814 rate = rk3308_mmc_get_clk(clk);
815 break;
816 case SCLK_I2C0:
817 case SCLK_I2C1:
818 case SCLK_I2C2:
819 case SCLK_I2C3:
820 rate = rk3308_i2c_get_clk(clk);
821 break;
822 case SCLK_SARADC:
823 rate = rk3308_saradc_get_clk(clk);
824 break;
825 case SCLK_TSADC:
826 rate = rk3308_tsadc_get_clk(clk);
827 break;
828 case SCLK_SPI0:
829 case SCLK_SPI1:
830 rate = rk3308_spi_get_clk(clk);
831 break;
832 case SCLK_PWM0:
833 rate = rk3308_pwm_get_clk(clk);
834 break;
835 case DCLK_VOP:
836 rate = rk3308_vop_get_clk(clk);
837 break;
838 case ACLK_BUS:
839 case HCLK_BUS:
840 case PCLK_BUS:
841 case PCLK_WDT:
842 rate = rk3308_bus_get_clk(priv, clk->id);
843 break;
844 case ACLK_PERI:
845 case HCLK_PERI:
846 case PCLK_PERI:
847 rate = rk3308_peri_get_clk(priv, clk->id);
848 break;
849 case HCLK_AUDIO:
850 case PCLK_AUDIO:
851 rate = rk3308_audio_get_clk(priv, clk->id);
852 break;
853 case SCLK_CRYPTO:
854 case SCLK_CRYPTO_APK:
855 rate = rk3308_crypto_get_clk(priv, clk->id);
856 break;
857 default:
858 return -ENOENT;
859 }
860
861 return rate;
862 }
863
rk3308_clk_set_rate(struct clk * clk,ulong rate)864 static ulong rk3308_clk_set_rate(struct clk *clk, ulong rate)
865 {
866 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
867 ulong ret = 0;
868
869 debug("%s %ld %ld\n", __func__, clk->id, rate);
870
871 switch (clk->id) {
872 case PLL_DPLL:
873 ret = rockchip_pll_set_rate(&rk3308_pll_clks[DPLL], priv->cru,
874 DPLL, rate);
875 priv->dpll_hz = rockchip_pll_get_rate(&rk3308_pll_clks[DPLL],
876 priv->cru, DPLL);
877 break;
878 case ARMCLK:
879 if (priv->armclk_hz)
880 rk3308_armclk_set_clk(priv, rate);
881 priv->armclk_hz = rate;
882 break;
883 case HCLK_SDMMC:
884 case HCLK_EMMC:
885 case SCLK_SDMMC:
886 case SCLK_EMMC:
887 ret = rk3308_mmc_set_clk(clk, rate);
888 break;
889 case SCLK_I2C0:
890 case SCLK_I2C1:
891 case SCLK_I2C2:
892 case SCLK_I2C3:
893 ret = rk3308_i2c_set_clk(clk, rate);
894 break;
895 case SCLK_MAC:
896 ret = rk3308_mac_set_clk(clk, rate);
897 break;
898 case SCLK_MAC_RMII:
899 ret = rk3308_mac_set_speed_clk(clk, rate);
900 break;
901 case SCLK_SARADC:
902 ret = rk3308_saradc_set_clk(clk, rate);
903 break;
904 case SCLK_TSADC:
905 ret = rk3308_tsadc_set_clk(clk, rate);
906 break;
907 case SCLK_SPI0:
908 case SCLK_SPI1:
909 ret = rk3308_spi_set_clk(clk, rate);
910 break;
911 case SCLK_PWM0:
912 ret = rk3308_pwm_set_clk(clk, rate);
913 break;
914 case DCLK_VOP:
915 ret = rk3308_vop_set_clk(clk, rate);
916 break;
917 case ACLK_BUS:
918 case HCLK_BUS:
919 case PCLK_BUS:
920 rate = rk3308_bus_set_clk(priv, clk->id, rate);
921 break;
922 case ACLK_PERI:
923 case HCLK_PERI:
924 case PCLK_PERI:
925 rate = rk3308_peri_set_clk(priv, clk->id, rate);
926 break;
927 case HCLK_AUDIO:
928 case PCLK_AUDIO:
929 rate = rk3308_audio_set_clk(priv, clk->id, rate);
930 break;
931 case SCLK_CRYPTO:
932 case SCLK_CRYPTO_APK:
933 ret = rk3308_crypto_set_clk(priv, clk->id, rate);
934 break;
935 default:
936 return -ENOENT;
937 }
938
939 return ret;
940 }
941
942 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
rk3308_mac_set_parent(struct clk * clk,struct clk * parent)943 static int __maybe_unused rk3308_mac_set_parent(struct clk *clk, struct clk *parent)
944 {
945 struct rk3308_clk_priv *priv = dev_get_priv(clk->dev);
946
947 /*
948 * If the requested parent is in the same clock-controller and
949 * the id is SCLK_MAC_SRC, switch to the internal clock.
950 */
951 if (parent->id == SCLK_MAC_SRC) {
952 debug("%s: switching RMII to SCLK_MAC\n", __func__);
953 rk_clrreg(&priv->cru->clksel_con[43], BIT(14));
954 } else {
955 debug("%s: switching RMII to CLKIN\n", __func__);
956 rk_setreg(&priv->cru->clksel_con[43], BIT(14));
957 }
958
959 return 0;
960 }
961
rk3308_clk_set_parent(struct clk * clk,struct clk * parent)962 static int __maybe_unused rk3308_clk_set_parent(struct clk *clk, struct clk *parent)
963 {
964 switch (clk->id) {
965 case SCLK_MAC:
966 return rk3308_mac_set_parent(clk, parent);
967 default:
968 break;
969 }
970
971 debug("%s: unsupported clk %ld\n", __func__, clk->id);
972 return -ENOENT;
973 }
974 #endif
975
976 static struct clk_ops rk3308_clk_ops = {
977 .get_rate = rk3308_clk_get_rate,
978 .set_rate = rk3308_clk_set_rate,
979 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
980 .set_parent = rk3308_clk_set_parent,
981 #endif
982 };
983
rk3308_clk_init(struct udevice * dev)984 static void rk3308_clk_init(struct udevice *dev)
985 {
986 struct rk3308_clk_priv *priv = dev_get_priv(dev);
987 int ret;
988
989 if (rockchip_pll_get_rate(&rk3308_pll_clks[APLL],
990 priv->cru, APLL) != APLL_HZ) {
991 ret = rk3308_armclk_set_clk(priv, APLL_HZ);
992 if (ret < 0)
993 printf("%s failed to set armclk rate\n", __func__);
994 }
995
996 rk3308_clk_get_pll_rate(priv);
997
998 rk3308_bus_set_clk(priv, ACLK_BUS, BUS_ACLK_HZ);
999 rk3308_bus_set_clk(priv, HCLK_BUS, BUS_HCLK_HZ);
1000 rk3308_bus_set_clk(priv, PCLK_BUS, BUS_PCLK_HZ);
1001
1002 rk3308_peri_set_clk(priv, ACLK_PERI, PERI_ACLK_HZ);
1003 rk3308_peri_set_clk(priv, HCLK_PERI, PERI_HCLK_HZ);
1004 rk3308_peri_set_clk(priv, PCLK_PERI, PERI_PCLK_HZ);
1005
1006 rk3308_audio_set_clk(priv, HCLK_AUDIO, AUDIO_HCLK_HZ);
1007 rk3308_audio_set_clk(priv, PCLK_AUDIO, AUDIO_PCLK_HZ);
1008 }
1009
rk3308_clk_probe(struct udevice * dev)1010 static int rk3308_clk_probe(struct udevice *dev)
1011 {
1012 int ret;
1013
1014 rk3308_clk_init(dev);
1015
1016 /* Process 'assigned-{clocks/clock-parents/clock-rates}' properties */
1017 ret = clk_set_defaults(dev, 1);
1018 if (ret)
1019 debug("%s clk_set_defaults failed %d\n", __func__, ret);
1020
1021 return ret;
1022 }
1023
rk3308_clk_of_to_plat(struct udevice * dev)1024 static int rk3308_clk_of_to_plat(struct udevice *dev)
1025 {
1026 struct rk3308_clk_priv *priv = dev_get_priv(dev);
1027
1028 priv->cru = dev_read_addr_ptr(dev);
1029
1030 return 0;
1031 }
1032
rk3308_clk_bind(struct udevice * dev)1033 static int rk3308_clk_bind(struct udevice *dev)
1034 {
1035 int ret;
1036 struct udevice *sys_child;
1037 struct sysreset_reg *priv;
1038
1039 /* The reset driver does not have a device node, so bind it here */
1040 ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
1041 &sys_child);
1042 if (ret) {
1043 debug("Warning: No sysreset driver: ret=%d\n", ret);
1044 } else {
1045 priv = malloc(sizeof(struct sysreset_reg));
1046 priv->glb_srst_fst_value = offsetof(struct rk3308_cru,
1047 glb_srst_fst);
1048 priv->glb_srst_snd_value = offsetof(struct rk3308_cru,
1049 glb_srst_snd);
1050 dev_set_priv(sys_child, priv);
1051 }
1052
1053 #if CONFIG_IS_ENABLED(RESET_ROCKCHIP)
1054 ret = offsetof(struct rk3308_cru, softrst_con[0]);
1055 ret = rockchip_reset_bind(dev, ret, 12);
1056 if (ret)
1057 debug("Warning: software reset driver bind faile\n");
1058 #endif
1059
1060 return 0;
1061 }
1062
1063 static const struct udevice_id rk3308_clk_ids[] = {
1064 { .compatible = "rockchip,rk3308-cru" },
1065 { }
1066 };
1067
1068 U_BOOT_DRIVER(rockchip_rk3308_cru) = {
1069 .name = "rockchip_rk3308_cru",
1070 .id = UCLASS_CLK,
1071 .of_match = rk3308_clk_ids,
1072 .priv_auto = sizeof(struct rk3308_clk_priv),
1073 .of_to_plat = rk3308_clk_of_to_plat,
1074 .ops = &rk3308_clk_ops,
1075 .bind = rk3308_clk_bind,
1076 .probe = rk3308_clk_probe,
1077 };
1078