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10#include <asm/div64.h>
11#include <linux/slab.h>
12#include <linux/io.h>
13#include <linux/delay.h>
14#include <linux/clk-provider.h>
15#include <linux/iopoll.h>
16#include <linux/regmap.h>
17#include <linux/clk.h>
18#include "clk.h"
19
20#define PLL_MODE_MASK 0x3
21#define PLL_MODE_SLOW 0x0
22#define PLL_MODE_NORM 0x1
23#define PLL_MODE_DEEP 0x2
24#define PLL_RK3328_MODE_MASK 0x1
25
26struct rockchip_clk_pll {
27 struct clk_hw hw;
28
29 struct clk_mux pll_mux;
30 const struct clk_ops *pll_mux_ops;
31
32 struct notifier_block clk_nb;
33
34 void __iomem *reg_base;
35 int lock_offset;
36 unsigned int lock_shift;
37 enum rockchip_pll_type type;
38 u8 flags;
39 const struct rockchip_pll_rate_table *rate_table;
40 unsigned int rate_count;
41 spinlock_t *lock;
42
43 struct rockchip_clk_provider *ctx;
44};
45
46#define to_rockchip_clk_pll(_hw) container_of(_hw, struct rockchip_clk_pll, hw)
47#define to_rockchip_clk_pll_nb(nb) \
48 container_of(nb, struct rockchip_clk_pll, clk_nb)
49
50static const struct rockchip_pll_rate_table *rockchip_get_pll_settings(
51 struct rockchip_clk_pll *pll, unsigned long rate)
52{
53 const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
54 int i;
55
56 for (i = 0; i < pll->rate_count; i++) {
57 if (rate == rate_table[i].rate)
58 return &rate_table[i];
59 }
60
61 return NULL;
62}
63
64static long rockchip_pll_round_rate(struct clk_hw *hw,
65 unsigned long drate, unsigned long *prate)
66{
67 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
68 const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
69 int i;
70
71
72 for (i = 0; i < pll->rate_count; i++) {
73 if (drate >= rate_table[i].rate)
74 return rate_table[i].rate;
75 }
76
77
78 return rate_table[i - 1].rate;
79}
80
81
82
83
84
85
86static int rockchip_pll_wait_lock(struct rockchip_clk_pll *pll)
87{
88 struct regmap *grf = pll->ctx->grf;
89 unsigned int val;
90 int ret;
91
92 ret = regmap_read_poll_timeout(grf, pll->lock_offset, val,
93 val & BIT(pll->lock_shift), 0, 1000);
94 if (ret)
95 pr_err("%s: timeout waiting for pll to lock\n", __func__);
96
97 return ret;
98}
99
100
101
102
103
104#define RK3036_PLLCON(i) (i * 0x4)
105#define RK3036_PLLCON0_FBDIV_MASK 0xfff
106#define RK3036_PLLCON0_FBDIV_SHIFT 0
107#define RK3036_PLLCON0_POSTDIV1_MASK 0x7
108#define RK3036_PLLCON0_POSTDIV1_SHIFT 12
109#define RK3036_PLLCON1_REFDIV_MASK 0x3f
110#define RK3036_PLLCON1_REFDIV_SHIFT 0
111#define RK3036_PLLCON1_POSTDIV2_MASK 0x7
112#define RK3036_PLLCON1_POSTDIV2_SHIFT 6
113#define RK3036_PLLCON1_LOCK_STATUS BIT(10)
114#define RK3036_PLLCON1_DSMPD_MASK 0x1
115#define RK3036_PLLCON1_DSMPD_SHIFT 12
116#define RK3036_PLLCON1_PWRDOWN BIT(13)
117#define RK3036_PLLCON2_FRAC_MASK 0xffffff
118#define RK3036_PLLCON2_FRAC_SHIFT 0
119
120static int rockchip_rk3036_pll_wait_lock(struct rockchip_clk_pll *pll)
121{
122 u32 pllcon;
123 int ret;
124
125
126
127
128
129 ret = readl_relaxed_poll_timeout(pll->reg_base + RK3036_PLLCON(1),
130 pllcon,
131 pllcon & RK3036_PLLCON1_LOCK_STATUS,
132 0, 1000);
133 if (ret)
134 pr_err("%s: timeout waiting for pll to lock\n", __func__);
135
136 return ret;
137}
138
139static void rockchip_rk3036_pll_get_params(struct rockchip_clk_pll *pll,
140 struct rockchip_pll_rate_table *rate)
141{
142 u32 pllcon;
143
144 pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(0));
145 rate->fbdiv = ((pllcon >> RK3036_PLLCON0_FBDIV_SHIFT)
146 & RK3036_PLLCON0_FBDIV_MASK);
147 rate->postdiv1 = ((pllcon >> RK3036_PLLCON0_POSTDIV1_SHIFT)
148 & RK3036_PLLCON0_POSTDIV1_MASK);
149
150 pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(1));
151 rate->refdiv = ((pllcon >> RK3036_PLLCON1_REFDIV_SHIFT)
152 & RK3036_PLLCON1_REFDIV_MASK);
153 rate->postdiv2 = ((pllcon >> RK3036_PLLCON1_POSTDIV2_SHIFT)
154 & RK3036_PLLCON1_POSTDIV2_MASK);
155 rate->dsmpd = ((pllcon >> RK3036_PLLCON1_DSMPD_SHIFT)
156 & RK3036_PLLCON1_DSMPD_MASK);
157
158 pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(2));
159 rate->frac = ((pllcon >> RK3036_PLLCON2_FRAC_SHIFT)
160 & RK3036_PLLCON2_FRAC_MASK);
161}
162
163static unsigned long rockchip_rk3036_pll_recalc_rate(struct clk_hw *hw,
164 unsigned long prate)
165{
166 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
167 struct rockchip_pll_rate_table cur;
168 u64 rate64 = prate;
169
170 rockchip_rk3036_pll_get_params(pll, &cur);
171
172 rate64 *= cur.fbdiv;
173 do_div(rate64, cur.refdiv);
174
175 if (cur.dsmpd == 0) {
176
177 u64 frac_rate64 = prate * cur.frac;
178
179 do_div(frac_rate64, cur.refdiv);
180 rate64 += frac_rate64 >> 24;
181 }
182
183 do_div(rate64, cur.postdiv1);
184 do_div(rate64, cur.postdiv2);
185
186 return (unsigned long)rate64;
187}
188
189static int rockchip_rk3036_pll_set_params(struct rockchip_clk_pll *pll,
190 const struct rockchip_pll_rate_table *rate)
191{
192 const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
193 struct clk_mux *pll_mux = &pll->pll_mux;
194 struct rockchip_pll_rate_table cur;
195 u32 pllcon;
196 int rate_change_remuxed = 0;
197 int cur_parent;
198 int ret;
199
200 pr_debug("%s: rate settings for %lu fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
201 __func__, rate->rate, rate->fbdiv, rate->postdiv1, rate->refdiv,
202 rate->postdiv2, rate->dsmpd, rate->frac);
203
204 rockchip_rk3036_pll_get_params(pll, &cur);
205 cur.rate = 0;
206
207 cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
208 if (cur_parent == PLL_MODE_NORM) {
209 pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
210 rate_change_remuxed = 1;
211 }
212
213
214 writel_relaxed(HIWORD_UPDATE(rate->fbdiv, RK3036_PLLCON0_FBDIV_MASK,
215 RK3036_PLLCON0_FBDIV_SHIFT) |
216 HIWORD_UPDATE(rate->postdiv1, RK3036_PLLCON0_POSTDIV1_MASK,
217 RK3036_PLLCON0_POSTDIV1_SHIFT),
218 pll->reg_base + RK3036_PLLCON(0));
219
220 writel_relaxed(HIWORD_UPDATE(rate->refdiv, RK3036_PLLCON1_REFDIV_MASK,
221 RK3036_PLLCON1_REFDIV_SHIFT) |
222 HIWORD_UPDATE(rate->postdiv2, RK3036_PLLCON1_POSTDIV2_MASK,
223 RK3036_PLLCON1_POSTDIV2_SHIFT) |
224 HIWORD_UPDATE(rate->dsmpd, RK3036_PLLCON1_DSMPD_MASK,
225 RK3036_PLLCON1_DSMPD_SHIFT),
226 pll->reg_base + RK3036_PLLCON(1));
227
228
229 pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(2));
230 pllcon &= ~(RK3036_PLLCON2_FRAC_MASK << RK3036_PLLCON2_FRAC_SHIFT);
231 pllcon |= rate->frac << RK3036_PLLCON2_FRAC_SHIFT;
232 writel_relaxed(pllcon, pll->reg_base + RK3036_PLLCON(2));
233
234
235 ret = rockchip_rk3036_pll_wait_lock(pll);
236 if (ret) {
237 pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
238 __func__);
239 rockchip_rk3036_pll_set_params(pll, &cur);
240 }
241
242 if (rate_change_remuxed)
243 pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
244
245 return ret;
246}
247
248static int rockchip_rk3036_pll_set_rate(struct clk_hw *hw, unsigned long drate,
249 unsigned long prate)
250{
251 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
252 const struct rockchip_pll_rate_table *rate;
253
254 pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
255 __func__, __clk_get_name(hw->clk), drate, prate);
256
257
258 rate = rockchip_get_pll_settings(pll, drate);
259 if (!rate) {
260 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
261 drate, __clk_get_name(hw->clk));
262 return -EINVAL;
263 }
264
265 return rockchip_rk3036_pll_set_params(pll, rate);
266}
267
268static int rockchip_rk3036_pll_enable(struct clk_hw *hw)
269{
270 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
271
272 writel(HIWORD_UPDATE(0, RK3036_PLLCON1_PWRDOWN, 0),
273 pll->reg_base + RK3036_PLLCON(1));
274 rockchip_rk3036_pll_wait_lock(pll);
275
276 return 0;
277}
278
279static void rockchip_rk3036_pll_disable(struct clk_hw *hw)
280{
281 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
282
283 writel(HIWORD_UPDATE(RK3036_PLLCON1_PWRDOWN,
284 RK3036_PLLCON1_PWRDOWN, 0),
285 pll->reg_base + RK3036_PLLCON(1));
286}
287
288static int rockchip_rk3036_pll_is_enabled(struct clk_hw *hw)
289{
290 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
291 u32 pllcon = readl(pll->reg_base + RK3036_PLLCON(1));
292
293 return !(pllcon & RK3036_PLLCON1_PWRDOWN);
294}
295
296static int rockchip_rk3036_pll_init(struct clk_hw *hw)
297{
298 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
299 const struct rockchip_pll_rate_table *rate;
300 struct rockchip_pll_rate_table cur;
301 unsigned long drate;
302
303 if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
304 return 0;
305
306 drate = clk_hw_get_rate(hw);
307 rate = rockchip_get_pll_settings(pll, drate);
308
309
310 if (!rate)
311 return 0;
312
313 rockchip_rk3036_pll_get_params(pll, &cur);
314
315 pr_debug("%s: pll %s@%lu: Hz\n", __func__, __clk_get_name(hw->clk),
316 drate);
317 pr_debug("old - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
318 cur.fbdiv, cur.postdiv1, cur.refdiv, cur.postdiv2,
319 cur.dsmpd, cur.frac);
320 pr_debug("new - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
321 rate->fbdiv, rate->postdiv1, rate->refdiv, rate->postdiv2,
322 rate->dsmpd, rate->frac);
323
324 if (rate->fbdiv != cur.fbdiv || rate->postdiv1 != cur.postdiv1 ||
325 rate->refdiv != cur.refdiv || rate->postdiv2 != cur.postdiv2 ||
326 rate->dsmpd != cur.dsmpd ||
327 (!cur.dsmpd && (rate->frac != cur.frac))) {
328 struct clk *parent = clk_get_parent(hw->clk);
329
330 if (!parent) {
331 pr_warn("%s: parent of %s not available\n",
332 __func__, __clk_get_name(hw->clk));
333 return 0;
334 }
335
336 pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
337 __func__, __clk_get_name(hw->clk));
338 rockchip_rk3036_pll_set_params(pll, rate);
339 }
340
341 return 0;
342}
343
344static const struct clk_ops rockchip_rk3036_pll_clk_norate_ops = {
345 .recalc_rate = rockchip_rk3036_pll_recalc_rate,
346 .enable = rockchip_rk3036_pll_enable,
347 .disable = rockchip_rk3036_pll_disable,
348 .is_enabled = rockchip_rk3036_pll_is_enabled,
349};
350
351static const struct clk_ops rockchip_rk3036_pll_clk_ops = {
352 .recalc_rate = rockchip_rk3036_pll_recalc_rate,
353 .round_rate = rockchip_pll_round_rate,
354 .set_rate = rockchip_rk3036_pll_set_rate,
355 .enable = rockchip_rk3036_pll_enable,
356 .disable = rockchip_rk3036_pll_disable,
357 .is_enabled = rockchip_rk3036_pll_is_enabled,
358 .init = rockchip_rk3036_pll_init,
359};
360
361
362
363
364
365#define RK3066_PLL_RESET_DELAY(nr) ((nr * 500) / 24 + 1)
366
367#define RK3066_PLLCON(i) (i * 0x4)
368#define RK3066_PLLCON0_OD_MASK 0xf
369#define RK3066_PLLCON0_OD_SHIFT 0
370#define RK3066_PLLCON0_NR_MASK 0x3f
371#define RK3066_PLLCON0_NR_SHIFT 8
372#define RK3066_PLLCON1_NF_MASK 0x1fff
373#define RK3066_PLLCON1_NF_SHIFT 0
374#define RK3066_PLLCON2_NB_MASK 0xfff
375#define RK3066_PLLCON2_NB_SHIFT 0
376#define RK3066_PLLCON3_RESET (1 << 5)
377#define RK3066_PLLCON3_PWRDOWN (1 << 1)
378#define RK3066_PLLCON3_BYPASS (1 << 0)
379
380static void rockchip_rk3066_pll_get_params(struct rockchip_clk_pll *pll,
381 struct rockchip_pll_rate_table *rate)
382{
383 u32 pllcon;
384
385 pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
386 rate->nr = ((pllcon >> RK3066_PLLCON0_NR_SHIFT)
387 & RK3066_PLLCON0_NR_MASK) + 1;
388 rate->no = ((pllcon >> RK3066_PLLCON0_OD_SHIFT)
389 & RK3066_PLLCON0_OD_MASK) + 1;
390
391 pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
392 rate->nf = ((pllcon >> RK3066_PLLCON1_NF_SHIFT)
393 & RK3066_PLLCON1_NF_MASK) + 1;
394
395 pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(2));
396 rate->nb = ((pllcon >> RK3066_PLLCON2_NB_SHIFT)
397 & RK3066_PLLCON2_NB_MASK) + 1;
398}
399
400static unsigned long rockchip_rk3066_pll_recalc_rate(struct clk_hw *hw,
401 unsigned long prate)
402{
403 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
404 struct rockchip_pll_rate_table cur;
405 u64 rate64 = prate;
406 u32 pllcon;
407
408 pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(3));
409 if (pllcon & RK3066_PLLCON3_BYPASS) {
410 pr_debug("%s: pll %s is bypassed\n", __func__,
411 clk_hw_get_name(hw));
412 return prate;
413 }
414
415 rockchip_rk3066_pll_get_params(pll, &cur);
416
417 rate64 *= cur.nf;
418 do_div(rate64, cur.nr);
419 do_div(rate64, cur.no);
420
421 return (unsigned long)rate64;
422}
423
424static int rockchip_rk3066_pll_set_params(struct rockchip_clk_pll *pll,
425 const struct rockchip_pll_rate_table *rate)
426{
427 const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
428 struct clk_mux *pll_mux = &pll->pll_mux;
429 struct rockchip_pll_rate_table cur;
430 int rate_change_remuxed = 0;
431 int cur_parent;
432 int ret;
433
434 pr_debug("%s: rate settings for %lu (nr, no, nf): (%d, %d, %d)\n",
435 __func__, rate->rate, rate->nr, rate->no, rate->nf);
436
437 rockchip_rk3066_pll_get_params(pll, &cur);
438 cur.rate = 0;
439
440 cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
441 if (cur_parent == PLL_MODE_NORM) {
442 pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
443 rate_change_remuxed = 1;
444 }
445
446
447 writel(HIWORD_UPDATE(RK3066_PLLCON3_RESET, RK3066_PLLCON3_RESET, 0),
448 pll->reg_base + RK3066_PLLCON(3));
449
450
451 writel(HIWORD_UPDATE(rate->nr - 1, RK3066_PLLCON0_NR_MASK,
452 RK3066_PLLCON0_NR_SHIFT) |
453 HIWORD_UPDATE(rate->no - 1, RK3066_PLLCON0_OD_MASK,
454 RK3066_PLLCON0_OD_SHIFT),
455 pll->reg_base + RK3066_PLLCON(0));
456
457 writel_relaxed(HIWORD_UPDATE(rate->nf - 1, RK3066_PLLCON1_NF_MASK,
458 RK3066_PLLCON1_NF_SHIFT),
459 pll->reg_base + RK3066_PLLCON(1));
460 writel_relaxed(HIWORD_UPDATE(rate->nb - 1, RK3066_PLLCON2_NB_MASK,
461 RK3066_PLLCON2_NB_SHIFT),
462 pll->reg_base + RK3066_PLLCON(2));
463
464
465 writel(HIWORD_UPDATE(0, RK3066_PLLCON3_RESET, 0),
466 pll->reg_base + RK3066_PLLCON(3));
467 udelay(RK3066_PLL_RESET_DELAY(rate->nr));
468
469
470 ret = rockchip_pll_wait_lock(pll);
471 if (ret) {
472 pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
473 __func__);
474 rockchip_rk3066_pll_set_params(pll, &cur);
475 }
476
477 if (rate_change_remuxed)
478 pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
479
480 return ret;
481}
482
483static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
484 unsigned long prate)
485{
486 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
487 const struct rockchip_pll_rate_table *rate;
488
489 pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
490 __func__, clk_hw_get_name(hw), drate, prate);
491
492
493 rate = rockchip_get_pll_settings(pll, drate);
494 if (!rate) {
495 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
496 drate, clk_hw_get_name(hw));
497 return -EINVAL;
498 }
499
500 return rockchip_rk3066_pll_set_params(pll, rate);
501}
502
503static int rockchip_rk3066_pll_enable(struct clk_hw *hw)
504{
505 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
506
507 writel(HIWORD_UPDATE(0, RK3066_PLLCON3_PWRDOWN, 0),
508 pll->reg_base + RK3066_PLLCON(3));
509 rockchip_pll_wait_lock(pll);
510
511 return 0;
512}
513
514static void rockchip_rk3066_pll_disable(struct clk_hw *hw)
515{
516 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
517
518 writel(HIWORD_UPDATE(RK3066_PLLCON3_PWRDOWN,
519 RK3066_PLLCON3_PWRDOWN, 0),
520 pll->reg_base + RK3066_PLLCON(3));
521}
522
523static int rockchip_rk3066_pll_is_enabled(struct clk_hw *hw)
524{
525 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
526 u32 pllcon = readl(pll->reg_base + RK3066_PLLCON(3));
527
528 return !(pllcon & RK3066_PLLCON3_PWRDOWN);
529}
530
531static int rockchip_rk3066_pll_init(struct clk_hw *hw)
532{
533 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
534 const struct rockchip_pll_rate_table *rate;
535 struct rockchip_pll_rate_table cur;
536 unsigned long drate;
537
538 if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
539 return 0;
540
541 drate = clk_hw_get_rate(hw);
542 rate = rockchip_get_pll_settings(pll, drate);
543
544
545 if (!rate)
546 return 0;
547
548 rockchip_rk3066_pll_get_params(pll, &cur);
549
550 pr_debug("%s: pll %s@%lu: nr (%d:%d); no (%d:%d); nf(%d:%d), nb(%d:%d)\n",
551 __func__, clk_hw_get_name(hw), drate, rate->nr, cur.nr,
552 rate->no, cur.no, rate->nf, cur.nf, rate->nb, cur.nb);
553 if (rate->nr != cur.nr || rate->no != cur.no || rate->nf != cur.nf
554 || rate->nb != cur.nb) {
555 pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
556 __func__, clk_hw_get_name(hw));
557 rockchip_rk3066_pll_set_params(pll, rate);
558 }
559
560 return 0;
561}
562
563static const struct clk_ops rockchip_rk3066_pll_clk_norate_ops = {
564 .recalc_rate = rockchip_rk3066_pll_recalc_rate,
565 .enable = rockchip_rk3066_pll_enable,
566 .disable = rockchip_rk3066_pll_disable,
567 .is_enabled = rockchip_rk3066_pll_is_enabled,
568};
569
570static const struct clk_ops rockchip_rk3066_pll_clk_ops = {
571 .recalc_rate = rockchip_rk3066_pll_recalc_rate,
572 .round_rate = rockchip_pll_round_rate,
573 .set_rate = rockchip_rk3066_pll_set_rate,
574 .enable = rockchip_rk3066_pll_enable,
575 .disable = rockchip_rk3066_pll_disable,
576 .is_enabled = rockchip_rk3066_pll_is_enabled,
577 .init = rockchip_rk3066_pll_init,
578};
579
580
581
582
583
584#define RK3399_PLLCON(i) (i * 0x4)
585#define RK3399_PLLCON0_FBDIV_MASK 0xfff
586#define RK3399_PLLCON0_FBDIV_SHIFT 0
587#define RK3399_PLLCON1_REFDIV_MASK 0x3f
588#define RK3399_PLLCON1_REFDIV_SHIFT 0
589#define RK3399_PLLCON1_POSTDIV1_MASK 0x7
590#define RK3399_PLLCON1_POSTDIV1_SHIFT 8
591#define RK3399_PLLCON1_POSTDIV2_MASK 0x7
592#define RK3399_PLLCON1_POSTDIV2_SHIFT 12
593#define RK3399_PLLCON2_FRAC_MASK 0xffffff
594#define RK3399_PLLCON2_FRAC_SHIFT 0
595#define RK3399_PLLCON2_LOCK_STATUS BIT(31)
596#define RK3399_PLLCON3_PWRDOWN BIT(0)
597#define RK3399_PLLCON3_DSMPD_MASK 0x1
598#define RK3399_PLLCON3_DSMPD_SHIFT 3
599
600static int rockchip_rk3399_pll_wait_lock(struct rockchip_clk_pll *pll)
601{
602 u32 pllcon;
603 int ret;
604
605
606
607
608
609 ret = readl_relaxed_poll_timeout(pll->reg_base + RK3399_PLLCON(2),
610 pllcon,
611 pllcon & RK3399_PLLCON2_LOCK_STATUS,
612 0, 1000);
613 if (ret)
614 pr_err("%s: timeout waiting for pll to lock\n", __func__);
615
616 return ret;
617}
618
619static void rockchip_rk3399_pll_get_params(struct rockchip_clk_pll *pll,
620 struct rockchip_pll_rate_table *rate)
621{
622 u32 pllcon;
623
624 pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(0));
625 rate->fbdiv = ((pllcon >> RK3399_PLLCON0_FBDIV_SHIFT)
626 & RK3399_PLLCON0_FBDIV_MASK);
627
628 pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(1));
629 rate->refdiv = ((pllcon >> RK3399_PLLCON1_REFDIV_SHIFT)
630 & RK3399_PLLCON1_REFDIV_MASK);
631 rate->postdiv1 = ((pllcon >> RK3399_PLLCON1_POSTDIV1_SHIFT)
632 & RK3399_PLLCON1_POSTDIV1_MASK);
633 rate->postdiv2 = ((pllcon >> RK3399_PLLCON1_POSTDIV2_SHIFT)
634 & RK3399_PLLCON1_POSTDIV2_MASK);
635
636 pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2));
637 rate->frac = ((pllcon >> RK3399_PLLCON2_FRAC_SHIFT)
638 & RK3399_PLLCON2_FRAC_MASK);
639
640 pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(3));
641 rate->dsmpd = ((pllcon >> RK3399_PLLCON3_DSMPD_SHIFT)
642 & RK3399_PLLCON3_DSMPD_MASK);
643}
644
645static unsigned long rockchip_rk3399_pll_recalc_rate(struct clk_hw *hw,
646 unsigned long prate)
647{
648 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
649 struct rockchip_pll_rate_table cur;
650 u64 rate64 = prate;
651
652 rockchip_rk3399_pll_get_params(pll, &cur);
653
654 rate64 *= cur.fbdiv;
655 do_div(rate64, cur.refdiv);
656
657 if (cur.dsmpd == 0) {
658
659 u64 frac_rate64 = prate * cur.frac;
660
661 do_div(frac_rate64, cur.refdiv);
662 rate64 += frac_rate64 >> 24;
663 }
664
665 do_div(rate64, cur.postdiv1);
666 do_div(rate64, cur.postdiv2);
667
668 return (unsigned long)rate64;
669}
670
671static int rockchip_rk3399_pll_set_params(struct rockchip_clk_pll *pll,
672 const struct rockchip_pll_rate_table *rate)
673{
674 const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
675 struct clk_mux *pll_mux = &pll->pll_mux;
676 struct rockchip_pll_rate_table cur;
677 u32 pllcon;
678 int rate_change_remuxed = 0;
679 int cur_parent;
680 int ret;
681
682 pr_debug("%s: rate settings for %lu fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
683 __func__, rate->rate, rate->fbdiv, rate->postdiv1, rate->refdiv,
684 rate->postdiv2, rate->dsmpd, rate->frac);
685
686 rockchip_rk3399_pll_get_params(pll, &cur);
687 cur.rate = 0;
688
689 cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
690 if (cur_parent == PLL_MODE_NORM) {
691 pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
692 rate_change_remuxed = 1;
693 }
694
695
696 writel_relaxed(HIWORD_UPDATE(rate->fbdiv, RK3399_PLLCON0_FBDIV_MASK,
697 RK3399_PLLCON0_FBDIV_SHIFT),
698 pll->reg_base + RK3399_PLLCON(0));
699
700 writel_relaxed(HIWORD_UPDATE(rate->refdiv, RK3399_PLLCON1_REFDIV_MASK,
701 RK3399_PLLCON1_REFDIV_SHIFT) |
702 HIWORD_UPDATE(rate->postdiv1, RK3399_PLLCON1_POSTDIV1_MASK,
703 RK3399_PLLCON1_POSTDIV1_SHIFT) |
704 HIWORD_UPDATE(rate->postdiv2, RK3399_PLLCON1_POSTDIV2_MASK,
705 RK3399_PLLCON1_POSTDIV2_SHIFT),
706 pll->reg_base + RK3399_PLLCON(1));
707
708
709 pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2));
710 pllcon &= ~(RK3399_PLLCON2_FRAC_MASK << RK3399_PLLCON2_FRAC_SHIFT);
711 pllcon |= rate->frac << RK3399_PLLCON2_FRAC_SHIFT;
712 writel_relaxed(pllcon, pll->reg_base + RK3399_PLLCON(2));
713
714 writel_relaxed(HIWORD_UPDATE(rate->dsmpd, RK3399_PLLCON3_DSMPD_MASK,
715 RK3399_PLLCON3_DSMPD_SHIFT),
716 pll->reg_base + RK3399_PLLCON(3));
717
718
719 ret = rockchip_rk3399_pll_wait_lock(pll);
720 if (ret) {
721 pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
722 __func__);
723 rockchip_rk3399_pll_set_params(pll, &cur);
724 }
725
726 if (rate_change_remuxed)
727 pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
728
729 return ret;
730}
731
732static int rockchip_rk3399_pll_set_rate(struct clk_hw *hw, unsigned long drate,
733 unsigned long prate)
734{
735 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
736 const struct rockchip_pll_rate_table *rate;
737
738 pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
739 __func__, __clk_get_name(hw->clk), drate, prate);
740
741
742 rate = rockchip_get_pll_settings(pll, drate);
743 if (!rate) {
744 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
745 drate, __clk_get_name(hw->clk));
746 return -EINVAL;
747 }
748
749 return rockchip_rk3399_pll_set_params(pll, rate);
750}
751
752static int rockchip_rk3399_pll_enable(struct clk_hw *hw)
753{
754 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
755
756 writel(HIWORD_UPDATE(0, RK3399_PLLCON3_PWRDOWN, 0),
757 pll->reg_base + RK3399_PLLCON(3));
758 rockchip_rk3399_pll_wait_lock(pll);
759
760 return 0;
761}
762
763static void rockchip_rk3399_pll_disable(struct clk_hw *hw)
764{
765 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
766
767 writel(HIWORD_UPDATE(RK3399_PLLCON3_PWRDOWN,
768 RK3399_PLLCON3_PWRDOWN, 0),
769 pll->reg_base + RK3399_PLLCON(3));
770}
771
772static int rockchip_rk3399_pll_is_enabled(struct clk_hw *hw)
773{
774 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
775 u32 pllcon = readl(pll->reg_base + RK3399_PLLCON(3));
776
777 return !(pllcon & RK3399_PLLCON3_PWRDOWN);
778}
779
780static int rockchip_rk3399_pll_init(struct clk_hw *hw)
781{
782 struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
783 const struct rockchip_pll_rate_table *rate;
784 struct rockchip_pll_rate_table cur;
785 unsigned long drate;
786
787 if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
788 return 0;
789
790 drate = clk_hw_get_rate(hw);
791 rate = rockchip_get_pll_settings(pll, drate);
792
793
794 if (!rate)
795 return 0;
796
797 rockchip_rk3399_pll_get_params(pll, &cur);
798
799 pr_debug("%s: pll %s@%lu: Hz\n", __func__, __clk_get_name(hw->clk),
800 drate);
801 pr_debug("old - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
802 cur.fbdiv, cur.postdiv1, cur.refdiv, cur.postdiv2,
803 cur.dsmpd, cur.frac);
804 pr_debug("new - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
805 rate->fbdiv, rate->postdiv1, rate->refdiv, rate->postdiv2,
806 rate->dsmpd, rate->frac);
807
808 if (rate->fbdiv != cur.fbdiv || rate->postdiv1 != cur.postdiv1 ||
809 rate->refdiv != cur.refdiv || rate->postdiv2 != cur.postdiv2 ||
810 rate->dsmpd != cur.dsmpd ||
811 (!cur.dsmpd && (rate->frac != cur.frac))) {
812 struct clk *parent = clk_get_parent(hw->clk);
813
814 if (!parent) {
815 pr_warn("%s: parent of %s not available\n",
816 __func__, __clk_get_name(hw->clk));
817 return 0;
818 }
819
820 pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
821 __func__, __clk_get_name(hw->clk));
822 rockchip_rk3399_pll_set_params(pll, rate);
823 }
824
825 return 0;
826}
827
828static const struct clk_ops rockchip_rk3399_pll_clk_norate_ops = {
829 .recalc_rate = rockchip_rk3399_pll_recalc_rate,
830 .enable = rockchip_rk3399_pll_enable,
831 .disable = rockchip_rk3399_pll_disable,
832 .is_enabled = rockchip_rk3399_pll_is_enabled,
833};
834
835static const struct clk_ops rockchip_rk3399_pll_clk_ops = {
836 .recalc_rate = rockchip_rk3399_pll_recalc_rate,
837 .round_rate = rockchip_pll_round_rate,
838 .set_rate = rockchip_rk3399_pll_set_rate,
839 .enable = rockchip_rk3399_pll_enable,
840 .disable = rockchip_rk3399_pll_disable,
841 .is_enabled = rockchip_rk3399_pll_is_enabled,
842 .init = rockchip_rk3399_pll_init,
843};
844
845
846
847
848
849struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
850 enum rockchip_pll_type pll_type,
851 const char *name, const char *const *parent_names,
852 u8 num_parents, int con_offset, int grf_lock_offset,
853 int lock_shift, int mode_offset, int mode_shift,
854 struct rockchip_pll_rate_table *rate_table,
855 unsigned long flags, u8 clk_pll_flags)
856{
857 const char *pll_parents[3];
858 struct clk_init_data init;
859 struct rockchip_clk_pll *pll;
860 struct clk_mux *pll_mux;
861 struct clk *pll_clk, *mux_clk;
862 char pll_name[20];
863
864 if ((pll_type != pll_rk3328 && num_parents != 2) ||
865 (pll_type == pll_rk3328 && num_parents != 1)) {
866 pr_err("%s: needs two parent clocks\n", __func__);
867 return ERR_PTR(-EINVAL);
868 }
869
870
871 snprintf(pll_name, sizeof(pll_name), "pll_%s", name);
872
873 pll = kzalloc(sizeof(*pll), GFP_KERNEL);
874 if (!pll)
875 return ERR_PTR(-ENOMEM);
876
877
878 pll->pll_mux_ops = &clk_mux_ops;
879 pll_mux = &pll->pll_mux;
880 pll_mux->reg = ctx->reg_base + mode_offset;
881 pll_mux->shift = mode_shift;
882 if (pll_type == pll_rk3328)
883 pll_mux->mask = PLL_RK3328_MODE_MASK;
884 else
885 pll_mux->mask = PLL_MODE_MASK;
886 pll_mux->flags = 0;
887 pll_mux->lock = &ctx->lock;
888 pll_mux->hw.init = &init;
889
890 if (pll_type == pll_rk3036 ||
891 pll_type == pll_rk3066 ||
892 pll_type == pll_rk3328 ||
893 pll_type == pll_rk3399)
894 pll_mux->flags |= CLK_MUX_HIWORD_MASK;
895
896
897 pll_parents[0] = parent_names[0];
898 pll_parents[1] = pll_name;
899 pll_parents[2] = parent_names[1];
900
901 init.name = name;
902 init.flags = CLK_SET_RATE_PARENT;
903 init.ops = pll->pll_mux_ops;
904 init.parent_names = pll_parents;
905 if (pll_type == pll_rk3328)
906 init.num_parents = 2;
907 else
908 init.num_parents = ARRAY_SIZE(pll_parents);
909
910 mux_clk = clk_register(NULL, &pll_mux->hw);
911 if (IS_ERR(mux_clk))
912 goto err_mux;
913
914
915 init.name = pll_name;
916
917
918 init.flags = flags | CLK_IGNORE_UNUSED;
919
920 init.parent_names = &parent_names[0];
921 init.num_parents = 1;
922
923 if (rate_table) {
924 int len;
925
926
927 for (len = 0; rate_table[len].rate != 0; )
928 len++;
929
930 pll->rate_count = len;
931 pll->rate_table = kmemdup(rate_table,
932 pll->rate_count *
933 sizeof(struct rockchip_pll_rate_table),
934 GFP_KERNEL);
935 WARN(!pll->rate_table,
936 "%s: could not allocate rate table for %s\n",
937 __func__, name);
938 }
939
940 switch (pll_type) {
941 case pll_rk3036:
942 case pll_rk3328:
943 if (!pll->rate_table || IS_ERR(ctx->grf))
944 init.ops = &rockchip_rk3036_pll_clk_norate_ops;
945 else
946 init.ops = &rockchip_rk3036_pll_clk_ops;
947 break;
948 case pll_rk3066:
949 if (!pll->rate_table || IS_ERR(ctx->grf))
950 init.ops = &rockchip_rk3066_pll_clk_norate_ops;
951 else
952 init.ops = &rockchip_rk3066_pll_clk_ops;
953 break;
954 case pll_rk3399:
955 if (!pll->rate_table)
956 init.ops = &rockchip_rk3399_pll_clk_norate_ops;
957 else
958 init.ops = &rockchip_rk3399_pll_clk_ops;
959 break;
960 default:
961 pr_warn("%s: Unknown pll type for pll clk %s\n",
962 __func__, name);
963 }
964
965 pll->hw.init = &init;
966 pll->type = pll_type;
967 pll->reg_base = ctx->reg_base + con_offset;
968 pll->lock_offset = grf_lock_offset;
969 pll->lock_shift = lock_shift;
970 pll->flags = clk_pll_flags;
971 pll->lock = &ctx->lock;
972 pll->ctx = ctx;
973
974 pll_clk = clk_register(NULL, &pll->hw);
975 if (IS_ERR(pll_clk)) {
976 pr_err("%s: failed to register pll clock %s : %ld\n",
977 __func__, name, PTR_ERR(pll_clk));
978 goto err_pll;
979 }
980
981 return mux_clk;
982
983err_pll:
984 clk_unregister(mux_clk);
985 mux_clk = pll_clk;
986err_mux:
987 kfree(pll);
988 return mux_clk;
989}
990
