1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
4 * Copyright (c) 2013 Linaro Ltd.
5 *
6 * This file contains the utility functions to register the pll clocks.
7 */
8
9 #include <linux/errno.h>
10 #include <linux/hrtimer.h>
11 #include <linux/iopoll.h>
12 #include <linux/delay.h>
13 #include <linux/slab.h>
14 #include <linux/timekeeping.h>
15 #include <linux/clk-provider.h>
16 #include <linux/io.h>
17 #include "clk.h"
18 #include "clk-pll.h"
19
20 #define PLL_TIMEOUT_US 20000U
21 #define PLL_TIMEOUT_LOOPS 1000000U
22
23 struct samsung_clk_pll {
24 struct clk_hw hw;
25 void __iomem *lock_reg;
26 void __iomem *con_reg;
27 /* PLL enable control bit offset in @con_reg register */
28 unsigned short enable_offs;
29 /* PLL lock status bit offset in @con_reg register */
30 unsigned short lock_offs;
31 enum samsung_pll_type type;
32 unsigned int rate_count;
33 const struct samsung_pll_rate_table *rate_table;
34 };
35
36 #define to_clk_pll(_hw) container_of(_hw, struct samsung_clk_pll, hw)
37
samsung_get_pll_settings(struct samsung_clk_pll * pll,unsigned long rate)38 static const struct samsung_pll_rate_table *samsung_get_pll_settings(
39 struct samsung_clk_pll *pll, unsigned long rate)
40 {
41 const struct samsung_pll_rate_table *rate_table = pll->rate_table;
42 int i;
43
44 for (i = 0; i < pll->rate_count; i++) {
45 if (rate == rate_table[i].rate)
46 return &rate_table[i];
47 }
48
49 return NULL;
50 }
51
samsung_pll_round_rate(struct clk_hw * hw,unsigned long drate,unsigned long * prate)52 static long samsung_pll_round_rate(struct clk_hw *hw,
53 unsigned long drate, unsigned long *prate)
54 {
55 struct samsung_clk_pll *pll = to_clk_pll(hw);
56 const struct samsung_pll_rate_table *rate_table = pll->rate_table;
57 int i;
58
59 /* Assumming rate_table is in descending order */
60 for (i = 0; i < pll->rate_count; i++) {
61 if (drate >= rate_table[i].rate)
62 return rate_table[i].rate;
63 }
64
65 /* return minimum supported value */
66 return rate_table[i - 1].rate;
67 }
68
69 static bool pll_early_timeout = true;
70
samsung_pll_disable_early_timeout(void)71 static int __init samsung_pll_disable_early_timeout(void)
72 {
73 pll_early_timeout = false;
74 return 0;
75 }
76 arch_initcall(samsung_pll_disable_early_timeout);
77
78 /* Wait until the PLL is locked */
samsung_pll_lock_wait(struct samsung_clk_pll * pll,unsigned int reg_mask)79 static int samsung_pll_lock_wait(struct samsung_clk_pll *pll,
80 unsigned int reg_mask)
81 {
82 int i, ret;
83 u32 val;
84
85 /*
86 * This function might be called when the timekeeping API can't be used
87 * to detect timeouts. One situation is when the clocksource is not yet
88 * initialized, another when the timekeeping is suspended. udelay() also
89 * cannot be used when the clocksource is not running on arm64, since
90 * the current timer is used as cycle counter. So a simple busy loop
91 * is used here in that special cases. The limit of iterations has been
92 * derived from experimental measurements of various PLLs on multiple
93 * Exynos SoC variants. Single register read time was usually in range
94 * 0.4...1.5 us, never less than 0.4 us.
95 */
96 if (pll_early_timeout || timekeeping_suspended) {
97 i = PLL_TIMEOUT_LOOPS;
98 while (i-- > 0) {
99 if (readl_relaxed(pll->con_reg) & reg_mask)
100 return 0;
101
102 cpu_relax();
103 }
104 ret = -ETIMEDOUT;
105 } else {
106 ret = readl_relaxed_poll_timeout_atomic(pll->con_reg, val,
107 val & reg_mask, 0, PLL_TIMEOUT_US);
108 }
109
110 if (ret < 0)
111 pr_err("Could not lock PLL %s\n", clk_hw_get_name(&pll->hw));
112
113 return ret;
114 }
115
samsung_pll3xxx_enable(struct clk_hw * hw)116 static int samsung_pll3xxx_enable(struct clk_hw *hw)
117 {
118 struct samsung_clk_pll *pll = to_clk_pll(hw);
119 u32 tmp;
120
121 tmp = readl_relaxed(pll->con_reg);
122 tmp |= BIT(pll->enable_offs);
123 writel_relaxed(tmp, pll->con_reg);
124
125 return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
126 }
127
samsung_pll3xxx_disable(struct clk_hw * hw)128 static void samsung_pll3xxx_disable(struct clk_hw *hw)
129 {
130 struct samsung_clk_pll *pll = to_clk_pll(hw);
131 u32 tmp;
132
133 tmp = readl_relaxed(pll->con_reg);
134 tmp &= ~BIT(pll->enable_offs);
135 writel_relaxed(tmp, pll->con_reg);
136 }
137
138 /*
139 * PLL2126 Clock Type
140 */
141
142 #define PLL2126_MDIV_MASK (0xff)
143 #define PLL2126_PDIV_MASK (0x3f)
144 #define PLL2126_SDIV_MASK (0x3)
145 #define PLL2126_MDIV_SHIFT (16)
146 #define PLL2126_PDIV_SHIFT (8)
147 #define PLL2126_SDIV_SHIFT (0)
148
samsung_pll2126_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)149 static unsigned long samsung_pll2126_recalc_rate(struct clk_hw *hw,
150 unsigned long parent_rate)
151 {
152 struct samsung_clk_pll *pll = to_clk_pll(hw);
153 u32 pll_con, mdiv, pdiv, sdiv;
154 u64 fvco = parent_rate;
155
156 pll_con = readl_relaxed(pll->con_reg);
157 mdiv = (pll_con >> PLL2126_MDIV_SHIFT) & PLL2126_MDIV_MASK;
158 pdiv = (pll_con >> PLL2126_PDIV_SHIFT) & PLL2126_PDIV_MASK;
159 sdiv = (pll_con >> PLL2126_SDIV_SHIFT) & PLL2126_SDIV_MASK;
160
161 fvco *= (mdiv + 8);
162 do_div(fvco, (pdiv + 2) << sdiv);
163
164 return (unsigned long)fvco;
165 }
166
167 static const struct clk_ops samsung_pll2126_clk_ops = {
168 .recalc_rate = samsung_pll2126_recalc_rate,
169 };
170
171 /*
172 * PLL3000 Clock Type
173 */
174
175 #define PLL3000_MDIV_MASK (0xff)
176 #define PLL3000_PDIV_MASK (0x3)
177 #define PLL3000_SDIV_MASK (0x3)
178 #define PLL3000_MDIV_SHIFT (16)
179 #define PLL3000_PDIV_SHIFT (8)
180 #define PLL3000_SDIV_SHIFT (0)
181
samsung_pll3000_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)182 static unsigned long samsung_pll3000_recalc_rate(struct clk_hw *hw,
183 unsigned long parent_rate)
184 {
185 struct samsung_clk_pll *pll = to_clk_pll(hw);
186 u32 pll_con, mdiv, pdiv, sdiv;
187 u64 fvco = parent_rate;
188
189 pll_con = readl_relaxed(pll->con_reg);
190 mdiv = (pll_con >> PLL3000_MDIV_SHIFT) & PLL3000_MDIV_MASK;
191 pdiv = (pll_con >> PLL3000_PDIV_SHIFT) & PLL3000_PDIV_MASK;
192 sdiv = (pll_con >> PLL3000_SDIV_SHIFT) & PLL3000_SDIV_MASK;
193
194 fvco *= (2 * (mdiv + 8));
195 do_div(fvco, pdiv << sdiv);
196
197 return (unsigned long)fvco;
198 }
199
200 static const struct clk_ops samsung_pll3000_clk_ops = {
201 .recalc_rate = samsung_pll3000_recalc_rate,
202 };
203
204 /*
205 * PLL35xx Clock Type
206 */
207 /* Maximum lock time can be 270 * PDIV cycles */
208 #define PLL35XX_LOCK_FACTOR (270)
209
210 #define PLL35XX_MDIV_MASK (0x3FF)
211 #define PLL35XX_PDIV_MASK (0x3F)
212 #define PLL35XX_SDIV_MASK (0x7)
213 #define PLL35XX_MDIV_SHIFT (16)
214 #define PLL35XX_PDIV_SHIFT (8)
215 #define PLL35XX_SDIV_SHIFT (0)
216 #define PLL35XX_LOCK_STAT_SHIFT (29)
217 #define PLL35XX_ENABLE_SHIFT (31)
218
samsung_pll35xx_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)219 static unsigned long samsung_pll35xx_recalc_rate(struct clk_hw *hw,
220 unsigned long parent_rate)
221 {
222 struct samsung_clk_pll *pll = to_clk_pll(hw);
223 u32 mdiv, pdiv, sdiv, pll_con;
224 u64 fvco = parent_rate;
225
226 pll_con = readl_relaxed(pll->con_reg);
227 mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
228 pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;
229 sdiv = (pll_con >> PLL35XX_SDIV_SHIFT) & PLL35XX_SDIV_MASK;
230
231 fvco *= mdiv;
232 do_div(fvco, (pdiv << sdiv));
233
234 return (unsigned long)fvco;
235 }
236
samsung_pll35xx_mp_change(const struct samsung_pll_rate_table * rate,u32 pll_con)237 static inline bool samsung_pll35xx_mp_change(
238 const struct samsung_pll_rate_table *rate, u32 pll_con)
239 {
240 u32 old_mdiv, old_pdiv;
241
242 old_mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
243 old_pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;
244
245 return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv);
246 }
247
samsung_pll35xx_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long prate)248 static int samsung_pll35xx_set_rate(struct clk_hw *hw, unsigned long drate,
249 unsigned long prate)
250 {
251 struct samsung_clk_pll *pll = to_clk_pll(hw);
252 const struct samsung_pll_rate_table *rate;
253 u32 tmp;
254
255 /* Get required rate settings from table */
256 rate = samsung_get_pll_settings(pll, drate);
257 if (!rate) {
258 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
259 drate, clk_hw_get_name(hw));
260 return -EINVAL;
261 }
262
263 tmp = readl_relaxed(pll->con_reg);
264
265 if (!(samsung_pll35xx_mp_change(rate, tmp))) {
266 /* If only s change, change just s value only*/
267 tmp &= ~(PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT);
268 tmp |= rate->sdiv << PLL35XX_SDIV_SHIFT;
269 writel_relaxed(tmp, pll->con_reg);
270
271 return 0;
272 }
273
274 /* Set PLL lock time. */
275 writel_relaxed(rate->pdiv * PLL35XX_LOCK_FACTOR,
276 pll->lock_reg);
277
278 /* Change PLL PMS values */
279 tmp &= ~((PLL35XX_MDIV_MASK << PLL35XX_MDIV_SHIFT) |
280 (PLL35XX_PDIV_MASK << PLL35XX_PDIV_SHIFT) |
281 (PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT));
282 tmp |= (rate->mdiv << PLL35XX_MDIV_SHIFT) |
283 (rate->pdiv << PLL35XX_PDIV_SHIFT) |
284 (rate->sdiv << PLL35XX_SDIV_SHIFT);
285 writel_relaxed(tmp, pll->con_reg);
286
287 /* Wait for PLL lock if the PLL is enabled */
288 if (tmp & BIT(pll->enable_offs))
289 return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
290
291 return 0;
292 }
293
294 static const struct clk_ops samsung_pll35xx_clk_ops = {
295 .recalc_rate = samsung_pll35xx_recalc_rate,
296 .round_rate = samsung_pll_round_rate,
297 .set_rate = samsung_pll35xx_set_rate,
298 .enable = samsung_pll3xxx_enable,
299 .disable = samsung_pll3xxx_disable,
300 };
301
302 static const struct clk_ops samsung_pll35xx_clk_min_ops = {
303 .recalc_rate = samsung_pll35xx_recalc_rate,
304 };
305
306 /*
307 * PLL36xx Clock Type
308 */
309 /* Maximum lock time can be 3000 * PDIV cycles */
310 #define PLL36XX_LOCK_FACTOR (3000)
311
312 #define PLL36XX_KDIV_MASK (0xFFFF)
313 #define PLL36XX_MDIV_MASK (0x1FF)
314 #define PLL36XX_PDIV_MASK (0x3F)
315 #define PLL36XX_SDIV_MASK (0x7)
316 #define PLL36XX_MDIV_SHIFT (16)
317 #define PLL36XX_PDIV_SHIFT (8)
318 #define PLL36XX_SDIV_SHIFT (0)
319 #define PLL36XX_KDIV_SHIFT (0)
320 #define PLL36XX_LOCK_STAT_SHIFT (29)
321 #define PLL36XX_ENABLE_SHIFT (31)
322
samsung_pll36xx_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)323 static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw,
324 unsigned long parent_rate)
325 {
326 struct samsung_clk_pll *pll = to_clk_pll(hw);
327 u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
328 s16 kdiv;
329 u64 fvco = parent_rate;
330
331 pll_con0 = readl_relaxed(pll->con_reg);
332 pll_con1 = readl_relaxed(pll->con_reg + 4);
333 mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
334 pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
335 sdiv = (pll_con0 >> PLL36XX_SDIV_SHIFT) & PLL36XX_SDIV_MASK;
336 kdiv = (s16)(pll_con1 & PLL36XX_KDIV_MASK);
337
338 fvco *= (mdiv << 16) + kdiv;
339 do_div(fvco, (pdiv << sdiv));
340 fvco >>= 16;
341
342 return (unsigned long)fvco;
343 }
344
samsung_pll36xx_mpk_change(const struct samsung_pll_rate_table * rate,u32 pll_con0,u32 pll_con1)345 static inline bool samsung_pll36xx_mpk_change(
346 const struct samsung_pll_rate_table *rate, u32 pll_con0, u32 pll_con1)
347 {
348 u32 old_mdiv, old_pdiv, old_kdiv;
349
350 old_mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
351 old_pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
352 old_kdiv = (pll_con1 >> PLL36XX_KDIV_SHIFT) & PLL36XX_KDIV_MASK;
353
354 return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv ||
355 rate->kdiv != old_kdiv);
356 }
357
samsung_pll36xx_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long parent_rate)358 static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long drate,
359 unsigned long parent_rate)
360 {
361 struct samsung_clk_pll *pll = to_clk_pll(hw);
362 u32 pll_con0, pll_con1;
363 const struct samsung_pll_rate_table *rate;
364
365 rate = samsung_get_pll_settings(pll, drate);
366 if (!rate) {
367 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
368 drate, clk_hw_get_name(hw));
369 return -EINVAL;
370 }
371
372 pll_con0 = readl_relaxed(pll->con_reg);
373 pll_con1 = readl_relaxed(pll->con_reg + 4);
374
375 if (!(samsung_pll36xx_mpk_change(rate, pll_con0, pll_con1))) {
376 /* If only s change, change just s value only*/
377 pll_con0 &= ~(PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT);
378 pll_con0 |= (rate->sdiv << PLL36XX_SDIV_SHIFT);
379 writel_relaxed(pll_con0, pll->con_reg);
380
381 return 0;
382 }
383
384 /* Set PLL lock time. */
385 writel_relaxed(rate->pdiv * PLL36XX_LOCK_FACTOR, pll->lock_reg);
386
387 /* Change PLL PMS values */
388 pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) |
389 (PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) |
390 (PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT));
391 pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) |
392 (rate->pdiv << PLL36XX_PDIV_SHIFT) |
393 (rate->sdiv << PLL36XX_SDIV_SHIFT);
394 writel_relaxed(pll_con0, pll->con_reg);
395
396 pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT);
397 pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT;
398 writel_relaxed(pll_con1, pll->con_reg + 4);
399
400 if (pll_con0 & BIT(pll->enable_offs))
401 return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
402
403 return 0;
404 }
405
406 static const struct clk_ops samsung_pll36xx_clk_ops = {
407 .recalc_rate = samsung_pll36xx_recalc_rate,
408 .set_rate = samsung_pll36xx_set_rate,
409 .round_rate = samsung_pll_round_rate,
410 .enable = samsung_pll3xxx_enable,
411 .disable = samsung_pll3xxx_disable,
412 };
413
414 static const struct clk_ops samsung_pll36xx_clk_min_ops = {
415 .recalc_rate = samsung_pll36xx_recalc_rate,
416 };
417
418 /*
419 * PLL0822x Clock Type
420 */
421 /* Maximum lock time can be 150 * PDIV cycles */
422 #define PLL0822X_LOCK_FACTOR (150)
423
424 #define PLL0822X_MDIV_MASK (0x3FF)
425 #define PLL0822X_PDIV_MASK (0x3F)
426 #define PLL0822X_SDIV_MASK (0x7)
427 #define PLL0822X_MDIV_SHIFT (16)
428 #define PLL0822X_PDIV_SHIFT (8)
429 #define PLL0822X_SDIV_SHIFT (0)
430 #define PLL0822X_LOCK_STAT_SHIFT (29)
431 #define PLL0822X_ENABLE_SHIFT (31)
432
samsung_pll0822x_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)433 static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
434 unsigned long parent_rate)
435 {
436 struct samsung_clk_pll *pll = to_clk_pll(hw);
437 u32 mdiv, pdiv, sdiv, pll_con3;
438 u64 fvco = parent_rate;
439
440 pll_con3 = readl_relaxed(pll->con_reg);
441 mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL0822X_MDIV_MASK;
442 pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK;
443 sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK;
444
445 fvco *= mdiv;
446 do_div(fvco, (pdiv << sdiv));
447
448 return (unsigned long)fvco;
449 }
450
samsung_pll0822x_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long prate)451 static int samsung_pll0822x_set_rate(struct clk_hw *hw, unsigned long drate,
452 unsigned long prate)
453 {
454 const struct samsung_pll_rate_table *rate;
455 struct samsung_clk_pll *pll = to_clk_pll(hw);
456 u32 pll_con3;
457
458 /* Get required rate settings from table */
459 rate = samsung_get_pll_settings(pll, drate);
460 if (!rate) {
461 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
462 drate, clk_hw_get_name(hw));
463 return -EINVAL;
464 }
465
466 /* Change PLL PMS values */
467 pll_con3 = readl_relaxed(pll->con_reg);
468 pll_con3 &= ~((PLL0822X_MDIV_MASK << PLL0822X_MDIV_SHIFT) |
469 (PLL0822X_PDIV_MASK << PLL0822X_PDIV_SHIFT) |
470 (PLL0822X_SDIV_MASK << PLL0822X_SDIV_SHIFT));
471 pll_con3 |= (rate->mdiv << PLL0822X_MDIV_SHIFT) |
472 (rate->pdiv << PLL0822X_PDIV_SHIFT) |
473 (rate->sdiv << PLL0822X_SDIV_SHIFT);
474
475 /* Set PLL lock time */
476 writel_relaxed(rate->pdiv * PLL0822X_LOCK_FACTOR,
477 pll->lock_reg);
478
479 /* Write PMS values */
480 writel_relaxed(pll_con3, pll->con_reg);
481
482 /* Wait for PLL lock if the PLL is enabled */
483 if (pll_con3 & BIT(pll->enable_offs))
484 return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
485
486 return 0;
487 }
488
489 static const struct clk_ops samsung_pll0822x_clk_ops = {
490 .recalc_rate = samsung_pll0822x_recalc_rate,
491 .round_rate = samsung_pll_round_rate,
492 .set_rate = samsung_pll0822x_set_rate,
493 .enable = samsung_pll3xxx_enable,
494 .disable = samsung_pll3xxx_disable,
495 };
496
497 static const struct clk_ops samsung_pll0822x_clk_min_ops = {
498 .recalc_rate = samsung_pll0822x_recalc_rate,
499 };
500
501 /*
502 * PLL0831x Clock Type
503 */
504 /* Maximum lock time can be 500 * PDIV cycles */
505 #define PLL0831X_LOCK_FACTOR (500)
506
507 #define PLL0831X_KDIV_MASK (0xFFFF)
508 #define PLL0831X_MDIV_MASK (0x1FF)
509 #define PLL0831X_PDIV_MASK (0x3F)
510 #define PLL0831X_SDIV_MASK (0x7)
511 #define PLL0831X_MDIV_SHIFT (16)
512 #define PLL0831X_PDIV_SHIFT (8)
513 #define PLL0831X_SDIV_SHIFT (0)
514 #define PLL0831X_KDIV_SHIFT (0)
515 #define PLL0831X_LOCK_STAT_SHIFT (29)
516 #define PLL0831X_ENABLE_SHIFT (31)
517
samsung_pll0831x_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)518 static unsigned long samsung_pll0831x_recalc_rate(struct clk_hw *hw,
519 unsigned long parent_rate)
520 {
521 struct samsung_clk_pll *pll = to_clk_pll(hw);
522 u32 mdiv, pdiv, sdiv, pll_con3, pll_con5;
523 s16 kdiv;
524 u64 fvco = parent_rate;
525
526 pll_con3 = readl_relaxed(pll->con_reg);
527 pll_con5 = readl_relaxed(pll->con_reg + 8);
528 mdiv = (pll_con3 >> PLL0831X_MDIV_SHIFT) & PLL0831X_MDIV_MASK;
529 pdiv = (pll_con3 >> PLL0831X_PDIV_SHIFT) & PLL0831X_PDIV_MASK;
530 sdiv = (pll_con3 >> PLL0831X_SDIV_SHIFT) & PLL0831X_SDIV_MASK;
531 kdiv = (s16)((pll_con5 >> PLL0831X_KDIV_SHIFT) & PLL0831X_KDIV_MASK);
532
533 fvco *= (mdiv << 16) + kdiv;
534 do_div(fvco, (pdiv << sdiv));
535 fvco >>= 16;
536
537 return (unsigned long)fvco;
538 }
539
samsung_pll0831x_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long parent_rate)540 static int samsung_pll0831x_set_rate(struct clk_hw *hw, unsigned long drate,
541 unsigned long parent_rate)
542 {
543 const struct samsung_pll_rate_table *rate;
544 struct samsung_clk_pll *pll = to_clk_pll(hw);
545 u32 pll_con3, pll_con5;
546
547 /* Get required rate settings from table */
548 rate = samsung_get_pll_settings(pll, drate);
549 if (!rate) {
550 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
551 drate, clk_hw_get_name(hw));
552 return -EINVAL;
553 }
554
555 pll_con3 = readl_relaxed(pll->con_reg);
556 pll_con5 = readl_relaxed(pll->con_reg + 8);
557
558 /* Change PLL PMSK values */
559 pll_con3 &= ~((PLL0831X_MDIV_MASK << PLL0831X_MDIV_SHIFT) |
560 (PLL0831X_PDIV_MASK << PLL0831X_PDIV_SHIFT) |
561 (PLL0831X_SDIV_MASK << PLL0831X_SDIV_SHIFT));
562 pll_con3 |= (rate->mdiv << PLL0831X_MDIV_SHIFT) |
563 (rate->pdiv << PLL0831X_PDIV_SHIFT) |
564 (rate->sdiv << PLL0831X_SDIV_SHIFT);
565 pll_con5 &= ~(PLL0831X_KDIV_MASK << PLL0831X_KDIV_SHIFT);
566 /*
567 * kdiv is 16-bit 2's complement (s16), but stored as unsigned int.
568 * Cast it to u16 to avoid leading 0xffff's in case of negative value.
569 */
570 pll_con5 |= ((u16)rate->kdiv << PLL0831X_KDIV_SHIFT);
571
572 /* Set PLL lock time */
573 writel_relaxed(rate->pdiv * PLL0831X_LOCK_FACTOR, pll->lock_reg);
574
575 /* Write PMSK values */
576 writel_relaxed(pll_con3, pll->con_reg);
577 writel_relaxed(pll_con5, pll->con_reg + 8);
578
579 /* Wait for PLL lock if the PLL is enabled */
580 if (pll_con3 & BIT(pll->enable_offs))
581 return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
582
583 return 0;
584 }
585
586 static const struct clk_ops samsung_pll0831x_clk_ops = {
587 .recalc_rate = samsung_pll0831x_recalc_rate,
588 .set_rate = samsung_pll0831x_set_rate,
589 .round_rate = samsung_pll_round_rate,
590 .enable = samsung_pll3xxx_enable,
591 .disable = samsung_pll3xxx_disable,
592 };
593
594 static const struct clk_ops samsung_pll0831x_clk_min_ops = {
595 .recalc_rate = samsung_pll0831x_recalc_rate,
596 };
597
598 /*
599 * PLL45xx Clock Type
600 */
601 #define PLL4502_LOCK_FACTOR 400
602 #define PLL4508_LOCK_FACTOR 240
603
604 #define PLL45XX_MDIV_MASK (0x3FF)
605 #define PLL45XX_PDIV_MASK (0x3F)
606 #define PLL45XX_SDIV_MASK (0x7)
607 #define PLL45XX_AFC_MASK (0x1F)
608 #define PLL45XX_MDIV_SHIFT (16)
609 #define PLL45XX_PDIV_SHIFT (8)
610 #define PLL45XX_SDIV_SHIFT (0)
611 #define PLL45XX_AFC_SHIFT (0)
612
613 #define PLL45XX_ENABLE BIT(31)
614 #define PLL45XX_LOCKED BIT(29)
615
samsung_pll45xx_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)616 static unsigned long samsung_pll45xx_recalc_rate(struct clk_hw *hw,
617 unsigned long parent_rate)
618 {
619 struct samsung_clk_pll *pll = to_clk_pll(hw);
620 u32 mdiv, pdiv, sdiv, pll_con;
621 u64 fvco = parent_rate;
622
623 pll_con = readl_relaxed(pll->con_reg);
624 mdiv = (pll_con >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
625 pdiv = (pll_con >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
626 sdiv = (pll_con >> PLL45XX_SDIV_SHIFT) & PLL45XX_SDIV_MASK;
627
628 if (pll->type == pll_4508)
629 sdiv = sdiv - 1;
630
631 fvco *= mdiv;
632 do_div(fvco, (pdiv << sdiv));
633
634 return (unsigned long)fvco;
635 }
636
samsung_pll45xx_mp_change(u32 pll_con0,u32 pll_con1,const struct samsung_pll_rate_table * rate)637 static bool samsung_pll45xx_mp_change(u32 pll_con0, u32 pll_con1,
638 const struct samsung_pll_rate_table *rate)
639 {
640 u32 old_mdiv, old_pdiv, old_afc;
641
642 old_mdiv = (pll_con0 >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
643 old_pdiv = (pll_con0 >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
644 old_afc = (pll_con1 >> PLL45XX_AFC_SHIFT) & PLL45XX_AFC_MASK;
645
646 return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
647 || old_afc != rate->afc);
648 }
649
samsung_pll45xx_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long prate)650 static int samsung_pll45xx_set_rate(struct clk_hw *hw, unsigned long drate,
651 unsigned long prate)
652 {
653 struct samsung_clk_pll *pll = to_clk_pll(hw);
654 const struct samsung_pll_rate_table *rate;
655 u32 con0, con1;
656
657 /* Get required rate settings from table */
658 rate = samsung_get_pll_settings(pll, drate);
659 if (!rate) {
660 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
661 drate, clk_hw_get_name(hw));
662 return -EINVAL;
663 }
664
665 con0 = readl_relaxed(pll->con_reg);
666 con1 = readl_relaxed(pll->con_reg + 0x4);
667
668 if (!(samsung_pll45xx_mp_change(con0, con1, rate))) {
669 /* If only s change, change just s value only*/
670 con0 &= ~(PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT);
671 con0 |= rate->sdiv << PLL45XX_SDIV_SHIFT;
672 writel_relaxed(con0, pll->con_reg);
673
674 return 0;
675 }
676
677 /* Set PLL PMS values. */
678 con0 &= ~((PLL45XX_MDIV_MASK << PLL45XX_MDIV_SHIFT) |
679 (PLL45XX_PDIV_MASK << PLL45XX_PDIV_SHIFT) |
680 (PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT));
681 con0 |= (rate->mdiv << PLL45XX_MDIV_SHIFT) |
682 (rate->pdiv << PLL45XX_PDIV_SHIFT) |
683 (rate->sdiv << PLL45XX_SDIV_SHIFT);
684
685 /* Set PLL AFC value. */
686 con1 = readl_relaxed(pll->con_reg + 0x4);
687 con1 &= ~(PLL45XX_AFC_MASK << PLL45XX_AFC_SHIFT);
688 con1 |= (rate->afc << PLL45XX_AFC_SHIFT);
689
690 /* Set PLL lock time. */
691 switch (pll->type) {
692 case pll_4502:
693 writel_relaxed(rate->pdiv * PLL4502_LOCK_FACTOR, pll->lock_reg);
694 break;
695 case pll_4508:
696 writel_relaxed(rate->pdiv * PLL4508_LOCK_FACTOR, pll->lock_reg);
697 break;
698 default:
699 break;
700 }
701
702 /* Set new configuration. */
703 writel_relaxed(con1, pll->con_reg + 0x4);
704 writel_relaxed(con0, pll->con_reg);
705
706 /* Wait for PLL lock */
707 return samsung_pll_lock_wait(pll, PLL45XX_LOCKED);
708 }
709
710 static const struct clk_ops samsung_pll45xx_clk_ops = {
711 .recalc_rate = samsung_pll45xx_recalc_rate,
712 .round_rate = samsung_pll_round_rate,
713 .set_rate = samsung_pll45xx_set_rate,
714 };
715
716 static const struct clk_ops samsung_pll45xx_clk_min_ops = {
717 .recalc_rate = samsung_pll45xx_recalc_rate,
718 };
719
720 /*
721 * PLL46xx Clock Type
722 */
723 #define PLL46XX_LOCK_FACTOR 3000
724
725 #define PLL46XX_VSEL_MASK (1)
726 #define PLL46XX_MDIV_MASK (0x1FF)
727 #define PLL1460X_MDIV_MASK (0x3FF)
728
729 #define PLL46XX_PDIV_MASK (0x3F)
730 #define PLL46XX_SDIV_MASK (0x7)
731 #define PLL46XX_VSEL_SHIFT (27)
732 #define PLL46XX_MDIV_SHIFT (16)
733 #define PLL46XX_PDIV_SHIFT (8)
734 #define PLL46XX_SDIV_SHIFT (0)
735
736 #define PLL46XX_KDIV_MASK (0xFFFF)
737 #define PLL4650C_KDIV_MASK (0xFFF)
738 #define PLL46XX_KDIV_SHIFT (0)
739 #define PLL46XX_MFR_MASK (0x3F)
740 #define PLL46XX_MRR_MASK (0x1F)
741 #define PLL46XX_KDIV_SHIFT (0)
742 #define PLL46XX_MFR_SHIFT (16)
743 #define PLL46XX_MRR_SHIFT (24)
744
745 #define PLL46XX_ENABLE BIT(31)
746 #define PLL46XX_LOCKED BIT(29)
747 #define PLL46XX_VSEL BIT(27)
748
samsung_pll46xx_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)749 static unsigned long samsung_pll46xx_recalc_rate(struct clk_hw *hw,
750 unsigned long parent_rate)
751 {
752 struct samsung_clk_pll *pll = to_clk_pll(hw);
753 u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1, shift;
754 u64 fvco = parent_rate;
755
756 pll_con0 = readl_relaxed(pll->con_reg);
757 pll_con1 = readl_relaxed(pll->con_reg + 4);
758 mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & ((pll->type == pll_1460x) ?
759 PLL1460X_MDIV_MASK : PLL46XX_MDIV_MASK);
760 pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
761 sdiv = (pll_con0 >> PLL46XX_SDIV_SHIFT) & PLL46XX_SDIV_MASK;
762 kdiv = pll->type == pll_4650c ? pll_con1 & PLL4650C_KDIV_MASK :
763 pll_con1 & PLL46XX_KDIV_MASK;
764
765 shift = ((pll->type == pll_4600) || (pll->type == pll_1460x)) ? 16 : 10;
766
767 fvco *= (mdiv << shift) + kdiv;
768 do_div(fvco, (pdiv << sdiv));
769 fvco >>= shift;
770
771 return (unsigned long)fvco;
772 }
773
samsung_pll46xx_mpk_change(u32 pll_con0,u32 pll_con1,const struct samsung_pll_rate_table * rate)774 static bool samsung_pll46xx_mpk_change(u32 pll_con0, u32 pll_con1,
775 const struct samsung_pll_rate_table *rate)
776 {
777 u32 old_mdiv, old_pdiv, old_kdiv;
778
779 old_mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
780 old_pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
781 old_kdiv = (pll_con1 >> PLL46XX_KDIV_SHIFT) & PLL46XX_KDIV_MASK;
782
783 return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
784 || old_kdiv != rate->kdiv);
785 }
786
samsung_pll46xx_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long prate)787 static int samsung_pll46xx_set_rate(struct clk_hw *hw, unsigned long drate,
788 unsigned long prate)
789 {
790 struct samsung_clk_pll *pll = to_clk_pll(hw);
791 const struct samsung_pll_rate_table *rate;
792 u32 con0, con1, lock;
793
794 /* Get required rate settings from table */
795 rate = samsung_get_pll_settings(pll, drate);
796 if (!rate) {
797 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
798 drate, clk_hw_get_name(hw));
799 return -EINVAL;
800 }
801
802 con0 = readl_relaxed(pll->con_reg);
803 con1 = readl_relaxed(pll->con_reg + 0x4);
804
805 if (!(samsung_pll46xx_mpk_change(con0, con1, rate))) {
806 /* If only s change, change just s value only*/
807 con0 &= ~(PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT);
808 con0 |= rate->sdiv << PLL46XX_SDIV_SHIFT;
809 writel_relaxed(con0, pll->con_reg);
810
811 return 0;
812 }
813
814 /* Set PLL lock time. */
815 lock = rate->pdiv * PLL46XX_LOCK_FACTOR;
816 if (lock > 0xffff)
817 /* Maximum lock time bitfield is 16-bit. */
818 lock = 0xffff;
819
820 /* Set PLL PMS and VSEL values. */
821 if (pll->type == pll_1460x) {
822 con0 &= ~((PLL1460X_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
823 (PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
824 (PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT));
825 } else {
826 con0 &= ~((PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
827 (PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
828 (PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT) |
829 (PLL46XX_VSEL_MASK << PLL46XX_VSEL_SHIFT));
830 con0 |= rate->vsel << PLL46XX_VSEL_SHIFT;
831 }
832
833 con0 |= (rate->mdiv << PLL46XX_MDIV_SHIFT) |
834 (rate->pdiv << PLL46XX_PDIV_SHIFT) |
835 (rate->sdiv << PLL46XX_SDIV_SHIFT);
836
837 /* Set PLL K, MFR and MRR values. */
838 con1 = readl_relaxed(pll->con_reg + 0x4);
839 con1 &= ~((PLL46XX_KDIV_MASK << PLL46XX_KDIV_SHIFT) |
840 (PLL46XX_MFR_MASK << PLL46XX_MFR_SHIFT) |
841 (PLL46XX_MRR_MASK << PLL46XX_MRR_SHIFT));
842 con1 |= (rate->kdiv << PLL46XX_KDIV_SHIFT) |
843 (rate->mfr << PLL46XX_MFR_SHIFT) |
844 (rate->mrr << PLL46XX_MRR_SHIFT);
845
846 /* Write configuration to PLL */
847 writel_relaxed(lock, pll->lock_reg);
848 writel_relaxed(con0, pll->con_reg);
849 writel_relaxed(con1, pll->con_reg + 0x4);
850
851 /* Wait for PLL lock */
852 return samsung_pll_lock_wait(pll, PLL46XX_LOCKED);
853 }
854
855 static const struct clk_ops samsung_pll46xx_clk_ops = {
856 .recalc_rate = samsung_pll46xx_recalc_rate,
857 .round_rate = samsung_pll_round_rate,
858 .set_rate = samsung_pll46xx_set_rate,
859 };
860
861 static const struct clk_ops samsung_pll46xx_clk_min_ops = {
862 .recalc_rate = samsung_pll46xx_recalc_rate,
863 };
864
865 /*
866 * PLL6552 Clock Type
867 */
868
869 #define PLL6552_MDIV_MASK 0x3ff
870 #define PLL6552_PDIV_MASK 0x3f
871 #define PLL6552_SDIV_MASK 0x7
872 #define PLL6552_MDIV_SHIFT 16
873 #define PLL6552_MDIV_SHIFT_2416 14
874 #define PLL6552_PDIV_SHIFT 8
875 #define PLL6552_PDIV_SHIFT_2416 5
876 #define PLL6552_SDIV_SHIFT 0
877
samsung_pll6552_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)878 static unsigned long samsung_pll6552_recalc_rate(struct clk_hw *hw,
879 unsigned long parent_rate)
880 {
881 struct samsung_clk_pll *pll = to_clk_pll(hw);
882 u32 mdiv, pdiv, sdiv, pll_con;
883 u64 fvco = parent_rate;
884
885 pll_con = readl_relaxed(pll->con_reg);
886 if (pll->type == pll_6552_s3c2416) {
887 mdiv = (pll_con >> PLL6552_MDIV_SHIFT_2416) & PLL6552_MDIV_MASK;
888 pdiv = (pll_con >> PLL6552_PDIV_SHIFT_2416) & PLL6552_PDIV_MASK;
889 } else {
890 mdiv = (pll_con >> PLL6552_MDIV_SHIFT) & PLL6552_MDIV_MASK;
891 pdiv = (pll_con >> PLL6552_PDIV_SHIFT) & PLL6552_PDIV_MASK;
892 }
893 sdiv = (pll_con >> PLL6552_SDIV_SHIFT) & PLL6552_SDIV_MASK;
894
895 fvco *= mdiv;
896 do_div(fvco, (pdiv << sdiv));
897
898 return (unsigned long)fvco;
899 }
900
901 static const struct clk_ops samsung_pll6552_clk_ops = {
902 .recalc_rate = samsung_pll6552_recalc_rate,
903 };
904
905 /*
906 * PLL6553 Clock Type
907 */
908
909 #define PLL6553_MDIV_MASK 0xff
910 #define PLL6553_PDIV_MASK 0x3f
911 #define PLL6553_SDIV_MASK 0x7
912 #define PLL6553_KDIV_MASK 0xffff
913 #define PLL6553_MDIV_SHIFT 16
914 #define PLL6553_PDIV_SHIFT 8
915 #define PLL6553_SDIV_SHIFT 0
916 #define PLL6553_KDIV_SHIFT 0
917
samsung_pll6553_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)918 static unsigned long samsung_pll6553_recalc_rate(struct clk_hw *hw,
919 unsigned long parent_rate)
920 {
921 struct samsung_clk_pll *pll = to_clk_pll(hw);
922 u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1;
923 u64 fvco = parent_rate;
924
925 pll_con0 = readl_relaxed(pll->con_reg);
926 pll_con1 = readl_relaxed(pll->con_reg + 0x4);
927 mdiv = (pll_con0 >> PLL6553_MDIV_SHIFT) & PLL6553_MDIV_MASK;
928 pdiv = (pll_con0 >> PLL6553_PDIV_SHIFT) & PLL6553_PDIV_MASK;
929 sdiv = (pll_con0 >> PLL6553_SDIV_SHIFT) & PLL6553_SDIV_MASK;
930 kdiv = (pll_con1 >> PLL6553_KDIV_SHIFT) & PLL6553_KDIV_MASK;
931
932 fvco *= (mdiv << 16) + kdiv;
933 do_div(fvco, (pdiv << sdiv));
934 fvco >>= 16;
935
936 return (unsigned long)fvco;
937 }
938
939 static const struct clk_ops samsung_pll6553_clk_ops = {
940 .recalc_rate = samsung_pll6553_recalc_rate,
941 };
942
943 /*
944 * PLL2550x Clock Type
945 */
946
947 #define PLL2550X_R_MASK (0x1)
948 #define PLL2550X_P_MASK (0x3F)
949 #define PLL2550X_M_MASK (0x3FF)
950 #define PLL2550X_S_MASK (0x7)
951 #define PLL2550X_R_SHIFT (20)
952 #define PLL2550X_P_SHIFT (14)
953 #define PLL2550X_M_SHIFT (4)
954 #define PLL2550X_S_SHIFT (0)
955
samsung_pll2550x_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)956 static unsigned long samsung_pll2550x_recalc_rate(struct clk_hw *hw,
957 unsigned long parent_rate)
958 {
959 struct samsung_clk_pll *pll = to_clk_pll(hw);
960 u32 r, p, m, s, pll_stat;
961 u64 fvco = parent_rate;
962
963 pll_stat = readl_relaxed(pll->con_reg);
964 r = (pll_stat >> PLL2550X_R_SHIFT) & PLL2550X_R_MASK;
965 if (!r)
966 return 0;
967 p = (pll_stat >> PLL2550X_P_SHIFT) & PLL2550X_P_MASK;
968 m = (pll_stat >> PLL2550X_M_SHIFT) & PLL2550X_M_MASK;
969 s = (pll_stat >> PLL2550X_S_SHIFT) & PLL2550X_S_MASK;
970
971 fvco *= m;
972 do_div(fvco, (p << s));
973
974 return (unsigned long)fvco;
975 }
976
977 static const struct clk_ops samsung_pll2550x_clk_ops = {
978 .recalc_rate = samsung_pll2550x_recalc_rate,
979 };
980
981 /*
982 * PLL2550xx Clock Type
983 */
984
985 /* Maximum lock time can be 270 * PDIV cycles */
986 #define PLL2550XX_LOCK_FACTOR 270
987
988 #define PLL2550XX_M_MASK 0x3FF
989 #define PLL2550XX_P_MASK 0x3F
990 #define PLL2550XX_S_MASK 0x7
991 #define PLL2550XX_LOCK_STAT_MASK 0x1
992 #define PLL2550XX_M_SHIFT 9
993 #define PLL2550XX_P_SHIFT 3
994 #define PLL2550XX_S_SHIFT 0
995 #define PLL2550XX_LOCK_STAT_SHIFT 21
996
samsung_pll2550xx_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)997 static unsigned long samsung_pll2550xx_recalc_rate(struct clk_hw *hw,
998 unsigned long parent_rate)
999 {
1000 struct samsung_clk_pll *pll = to_clk_pll(hw);
1001 u32 mdiv, pdiv, sdiv, pll_con;
1002 u64 fvco = parent_rate;
1003
1004 pll_con = readl_relaxed(pll->con_reg);
1005 mdiv = (pll_con >> PLL2550XX_M_SHIFT) & PLL2550XX_M_MASK;
1006 pdiv = (pll_con >> PLL2550XX_P_SHIFT) & PLL2550XX_P_MASK;
1007 sdiv = (pll_con >> PLL2550XX_S_SHIFT) & PLL2550XX_S_MASK;
1008
1009 fvco *= mdiv;
1010 do_div(fvco, (pdiv << sdiv));
1011
1012 return (unsigned long)fvco;
1013 }
1014
samsung_pll2550xx_mp_change(u32 mdiv,u32 pdiv,u32 pll_con)1015 static inline bool samsung_pll2550xx_mp_change(u32 mdiv, u32 pdiv, u32 pll_con)
1016 {
1017 u32 old_mdiv, old_pdiv;
1018
1019 old_mdiv = (pll_con >> PLL2550XX_M_SHIFT) & PLL2550XX_M_MASK;
1020 old_pdiv = (pll_con >> PLL2550XX_P_SHIFT) & PLL2550XX_P_MASK;
1021
1022 return mdiv != old_mdiv || pdiv != old_pdiv;
1023 }
1024
samsung_pll2550xx_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long prate)1025 static int samsung_pll2550xx_set_rate(struct clk_hw *hw, unsigned long drate,
1026 unsigned long prate)
1027 {
1028 struct samsung_clk_pll *pll = to_clk_pll(hw);
1029 const struct samsung_pll_rate_table *rate;
1030 u32 tmp;
1031
1032 /* Get required rate settings from table */
1033 rate = samsung_get_pll_settings(pll, drate);
1034 if (!rate) {
1035 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
1036 drate, clk_hw_get_name(hw));
1037 return -EINVAL;
1038 }
1039
1040 tmp = readl_relaxed(pll->con_reg);
1041
1042 if (!(samsung_pll2550xx_mp_change(rate->mdiv, rate->pdiv, tmp))) {
1043 /* If only s change, change just s value only*/
1044 tmp &= ~(PLL2550XX_S_MASK << PLL2550XX_S_SHIFT);
1045 tmp |= rate->sdiv << PLL2550XX_S_SHIFT;
1046 writel_relaxed(tmp, pll->con_reg);
1047
1048 return 0;
1049 }
1050
1051 /* Set PLL lock time. */
1052 writel_relaxed(rate->pdiv * PLL2550XX_LOCK_FACTOR, pll->lock_reg);
1053
1054 /* Change PLL PMS values */
1055 tmp &= ~((PLL2550XX_M_MASK << PLL2550XX_M_SHIFT) |
1056 (PLL2550XX_P_MASK << PLL2550XX_P_SHIFT) |
1057 (PLL2550XX_S_MASK << PLL2550XX_S_SHIFT));
1058 tmp |= (rate->mdiv << PLL2550XX_M_SHIFT) |
1059 (rate->pdiv << PLL2550XX_P_SHIFT) |
1060 (rate->sdiv << PLL2550XX_S_SHIFT);
1061 writel_relaxed(tmp, pll->con_reg);
1062
1063 /* Wait for PLL lock */
1064 return samsung_pll_lock_wait(pll,
1065 PLL2550XX_LOCK_STAT_MASK << PLL2550XX_LOCK_STAT_SHIFT);
1066 }
1067
1068 static const struct clk_ops samsung_pll2550xx_clk_ops = {
1069 .recalc_rate = samsung_pll2550xx_recalc_rate,
1070 .round_rate = samsung_pll_round_rate,
1071 .set_rate = samsung_pll2550xx_set_rate,
1072 };
1073
1074 static const struct clk_ops samsung_pll2550xx_clk_min_ops = {
1075 .recalc_rate = samsung_pll2550xx_recalc_rate,
1076 };
1077
1078 /*
1079 * PLL2650x Clock Type
1080 */
1081
1082 /* Maximum lock time can be 3000 * PDIV cycles */
1083 #define PLL2650X_LOCK_FACTOR 3000
1084
1085 #define PLL2650X_M_MASK 0x1ff
1086 #define PLL2650X_P_MASK 0x3f
1087 #define PLL2650X_S_MASK 0x7
1088 #define PLL2650X_K_MASK 0xffff
1089 #define PLL2650X_LOCK_STAT_MASK 0x1
1090 #define PLL2650X_M_SHIFT 16
1091 #define PLL2650X_P_SHIFT 8
1092 #define PLL2650X_S_SHIFT 0
1093 #define PLL2650X_K_SHIFT 0
1094 #define PLL2650X_LOCK_STAT_SHIFT 29
1095 #define PLL2650X_PLL_ENABLE_SHIFT 31
1096
samsung_pll2650x_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)1097 static unsigned long samsung_pll2650x_recalc_rate(struct clk_hw *hw,
1098 unsigned long parent_rate)
1099 {
1100 struct samsung_clk_pll *pll = to_clk_pll(hw);
1101 u64 fout = parent_rate;
1102 u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
1103 s16 kdiv;
1104
1105 pll_con0 = readl_relaxed(pll->con_reg);
1106 mdiv = (pll_con0 >> PLL2650X_M_SHIFT) & PLL2650X_M_MASK;
1107 pdiv = (pll_con0 >> PLL2650X_P_SHIFT) & PLL2650X_P_MASK;
1108 sdiv = (pll_con0 >> PLL2650X_S_SHIFT) & PLL2650X_S_MASK;
1109
1110 pll_con1 = readl_relaxed(pll->con_reg + 4);
1111 kdiv = (s16)((pll_con1 >> PLL2650X_K_SHIFT) & PLL2650X_K_MASK);
1112
1113 fout *= (mdiv << 16) + kdiv;
1114 do_div(fout, (pdiv << sdiv));
1115 fout >>= 16;
1116
1117 return (unsigned long)fout;
1118 }
1119
samsung_pll2650x_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long prate)1120 static int samsung_pll2650x_set_rate(struct clk_hw *hw, unsigned long drate,
1121 unsigned long prate)
1122 {
1123 struct samsung_clk_pll *pll = to_clk_pll(hw);
1124 const struct samsung_pll_rate_table *rate;
1125 u32 con0, con1;
1126
1127 /* Get required rate settings from table */
1128 rate = samsung_get_pll_settings(pll, drate);
1129 if (!rate) {
1130 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
1131 drate, clk_hw_get_name(hw));
1132 return -EINVAL;
1133 }
1134
1135 con0 = readl_relaxed(pll->con_reg);
1136 con1 = readl_relaxed(pll->con_reg + 4);
1137
1138 /* Set PLL lock time. */
1139 writel_relaxed(rate->pdiv * PLL2650X_LOCK_FACTOR, pll->lock_reg);
1140
1141 /* Change PLL PMS values */
1142 con0 &= ~((PLL2650X_M_MASK << PLL2650X_M_SHIFT) |
1143 (PLL2650X_P_MASK << PLL2650X_P_SHIFT) |
1144 (PLL2650X_S_MASK << PLL2650X_S_SHIFT));
1145 con0 |= (rate->mdiv << PLL2650X_M_SHIFT) |
1146 (rate->pdiv << PLL2650X_P_SHIFT) |
1147 (rate->sdiv << PLL2650X_S_SHIFT);
1148 con0 |= (1 << PLL2650X_PLL_ENABLE_SHIFT);
1149 writel_relaxed(con0, pll->con_reg);
1150
1151 con1 &= ~(PLL2650X_K_MASK << PLL2650X_K_SHIFT);
1152 con1 |= ((rate->kdiv & PLL2650X_K_MASK) << PLL2650X_K_SHIFT);
1153 writel_relaxed(con1, pll->con_reg + 4);
1154
1155 /* Wait for PLL lock */
1156 return samsung_pll_lock_wait(pll,
1157 PLL2650X_LOCK_STAT_MASK << PLL2650X_LOCK_STAT_SHIFT);
1158 }
1159
1160 static const struct clk_ops samsung_pll2650x_clk_ops = {
1161 .recalc_rate = samsung_pll2650x_recalc_rate,
1162 .round_rate = samsung_pll_round_rate,
1163 .set_rate = samsung_pll2650x_set_rate,
1164 };
1165
1166 static const struct clk_ops samsung_pll2650x_clk_min_ops = {
1167 .recalc_rate = samsung_pll2650x_recalc_rate,
1168 };
1169
1170 /*
1171 * PLL2650XX Clock Type
1172 */
1173
1174 /* Maximum lock time can be 3000 * PDIV cycles */
1175 #define PLL2650XX_LOCK_FACTOR 3000
1176
1177 #define PLL2650XX_MDIV_SHIFT 9
1178 #define PLL2650XX_PDIV_SHIFT 3
1179 #define PLL2650XX_SDIV_SHIFT 0
1180 #define PLL2650XX_KDIV_SHIFT 0
1181 #define PLL2650XX_MDIV_MASK 0x1ff
1182 #define PLL2650XX_PDIV_MASK 0x3f
1183 #define PLL2650XX_SDIV_MASK 0x7
1184 #define PLL2650XX_KDIV_MASK 0xffff
1185 #define PLL2650XX_PLL_ENABLE_SHIFT 23
1186 #define PLL2650XX_PLL_LOCKTIME_SHIFT 21
1187 #define PLL2650XX_PLL_FOUTMASK_SHIFT 31
1188
samsung_pll2650xx_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)1189 static unsigned long samsung_pll2650xx_recalc_rate(struct clk_hw *hw,
1190 unsigned long parent_rate)
1191 {
1192 struct samsung_clk_pll *pll = to_clk_pll(hw);
1193 u32 mdiv, pdiv, sdiv, pll_con0, pll_con2;
1194 s16 kdiv;
1195 u64 fvco = parent_rate;
1196
1197 pll_con0 = readl_relaxed(pll->con_reg);
1198 pll_con2 = readl_relaxed(pll->con_reg + 8);
1199 mdiv = (pll_con0 >> PLL2650XX_MDIV_SHIFT) & PLL2650XX_MDIV_MASK;
1200 pdiv = (pll_con0 >> PLL2650XX_PDIV_SHIFT) & PLL2650XX_PDIV_MASK;
1201 sdiv = (pll_con0 >> PLL2650XX_SDIV_SHIFT) & PLL2650XX_SDIV_MASK;
1202 kdiv = (s16)(pll_con2 & PLL2650XX_KDIV_MASK);
1203
1204 fvco *= (mdiv << 16) + kdiv;
1205 do_div(fvco, (pdiv << sdiv));
1206 fvco >>= 16;
1207
1208 return (unsigned long)fvco;
1209 }
1210
samsung_pll2650xx_set_rate(struct clk_hw * hw,unsigned long drate,unsigned long parent_rate)1211 static int samsung_pll2650xx_set_rate(struct clk_hw *hw, unsigned long drate,
1212 unsigned long parent_rate)
1213 {
1214 struct samsung_clk_pll *pll = to_clk_pll(hw);
1215 u32 pll_con0, pll_con2;
1216 const struct samsung_pll_rate_table *rate;
1217
1218 rate = samsung_get_pll_settings(pll, drate);
1219 if (!rate) {
1220 pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
1221 drate, clk_hw_get_name(hw));
1222 return -EINVAL;
1223 }
1224
1225 pll_con0 = readl_relaxed(pll->con_reg);
1226 pll_con2 = readl_relaxed(pll->con_reg + 8);
1227
1228 /* Change PLL PMS values */
1229 pll_con0 &= ~(PLL2650XX_MDIV_MASK << PLL2650XX_MDIV_SHIFT |
1230 PLL2650XX_PDIV_MASK << PLL2650XX_PDIV_SHIFT |
1231 PLL2650XX_SDIV_MASK << PLL2650XX_SDIV_SHIFT);
1232 pll_con0 |= rate->mdiv << PLL2650XX_MDIV_SHIFT;
1233 pll_con0 |= rate->pdiv << PLL2650XX_PDIV_SHIFT;
1234 pll_con0 |= rate->sdiv << PLL2650XX_SDIV_SHIFT;
1235 pll_con0 |= 1 << PLL2650XX_PLL_ENABLE_SHIFT;
1236 pll_con0 |= 1 << PLL2650XX_PLL_FOUTMASK_SHIFT;
1237
1238 pll_con2 &= ~(PLL2650XX_KDIV_MASK << PLL2650XX_KDIV_SHIFT);
1239 pll_con2 |= ((~(rate->kdiv) + 1) & PLL2650XX_KDIV_MASK)
1240 << PLL2650XX_KDIV_SHIFT;
1241
1242 /* Set PLL lock time. */
1243 writel_relaxed(PLL2650XX_LOCK_FACTOR * rate->pdiv, pll->lock_reg);
1244
1245 writel_relaxed(pll_con0, pll->con_reg);
1246 writel_relaxed(pll_con2, pll->con_reg + 8);
1247
1248 return samsung_pll_lock_wait(pll, 0x1 << PLL2650XX_PLL_LOCKTIME_SHIFT);
1249 }
1250
1251 static const struct clk_ops samsung_pll2650xx_clk_ops = {
1252 .recalc_rate = samsung_pll2650xx_recalc_rate,
1253 .set_rate = samsung_pll2650xx_set_rate,
1254 .round_rate = samsung_pll_round_rate,
1255 };
1256
1257 static const struct clk_ops samsung_pll2650xx_clk_min_ops = {
1258 .recalc_rate = samsung_pll2650xx_recalc_rate,
1259 };
1260
_samsung_clk_register_pll(struct samsung_clk_provider * ctx,const struct samsung_pll_clock * pll_clk)1261 static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
1262 const struct samsung_pll_clock *pll_clk)
1263 {
1264 struct samsung_clk_pll *pll;
1265 struct clk_init_data init;
1266 int ret, len;
1267
1268 pll = kzalloc(sizeof(*pll), GFP_KERNEL);
1269 if (!pll) {
1270 pr_err("%s: could not allocate pll clk %s\n",
1271 __func__, pll_clk->name);
1272 return;
1273 }
1274
1275 init.name = pll_clk->name;
1276 init.flags = pll_clk->flags;
1277 init.parent_names = &pll_clk->parent_name;
1278 init.num_parents = 1;
1279
1280 if (pll_clk->rate_table) {
1281 /* find count of rates in rate_table */
1282 for (len = 0; pll_clk->rate_table[len].rate != 0; )
1283 len++;
1284
1285 pll->rate_count = len;
1286 pll->rate_table = kmemdup(pll_clk->rate_table,
1287 pll->rate_count *
1288 sizeof(struct samsung_pll_rate_table),
1289 GFP_KERNEL);
1290 WARN(!pll->rate_table,
1291 "%s: could not allocate rate table for %s\n",
1292 __func__, pll_clk->name);
1293 }
1294
1295 switch (pll_clk->type) {
1296 case pll_2126:
1297 init.ops = &samsung_pll2126_clk_ops;
1298 break;
1299 case pll_3000:
1300 init.ops = &samsung_pll3000_clk_ops;
1301 break;
1302 /* clk_ops for 35xx and 2550 are similar */
1303 case pll_35xx:
1304 case pll_2550:
1305 case pll_1450x:
1306 case pll_1451x:
1307 case pll_1452x:
1308 case pll_142xx:
1309 pll->enable_offs = PLL35XX_ENABLE_SHIFT;
1310 pll->lock_offs = PLL35XX_LOCK_STAT_SHIFT;
1311 if (!pll->rate_table)
1312 init.ops = &samsung_pll35xx_clk_min_ops;
1313 else
1314 init.ops = &samsung_pll35xx_clk_ops;
1315 break;
1316 case pll_1417x:
1317 case pll_0818x:
1318 case pll_0822x:
1319 pll->enable_offs = PLL0822X_ENABLE_SHIFT;
1320 pll->lock_offs = PLL0822X_LOCK_STAT_SHIFT;
1321 if (!pll->rate_table)
1322 init.ops = &samsung_pll0822x_clk_min_ops;
1323 else
1324 init.ops = &samsung_pll0822x_clk_ops;
1325 break;
1326 case pll_4500:
1327 init.ops = &samsung_pll45xx_clk_min_ops;
1328 break;
1329 case pll_4502:
1330 case pll_4508:
1331 if (!pll->rate_table)
1332 init.ops = &samsung_pll45xx_clk_min_ops;
1333 else
1334 init.ops = &samsung_pll45xx_clk_ops;
1335 break;
1336 /* clk_ops for 36xx and 2650 are similar */
1337 case pll_36xx:
1338 case pll_2650:
1339 pll->enable_offs = PLL36XX_ENABLE_SHIFT;
1340 pll->lock_offs = PLL36XX_LOCK_STAT_SHIFT;
1341 if (!pll->rate_table)
1342 init.ops = &samsung_pll36xx_clk_min_ops;
1343 else
1344 init.ops = &samsung_pll36xx_clk_ops;
1345 break;
1346 case pll_0831x:
1347 pll->enable_offs = PLL0831X_ENABLE_SHIFT;
1348 pll->lock_offs = PLL0831X_LOCK_STAT_SHIFT;
1349 if (!pll->rate_table)
1350 init.ops = &samsung_pll0831x_clk_min_ops;
1351 else
1352 init.ops = &samsung_pll0831x_clk_ops;
1353 break;
1354 case pll_6552:
1355 case pll_6552_s3c2416:
1356 init.ops = &samsung_pll6552_clk_ops;
1357 break;
1358 case pll_6553:
1359 init.ops = &samsung_pll6553_clk_ops;
1360 break;
1361 case pll_4600:
1362 case pll_4650:
1363 case pll_4650c:
1364 case pll_1460x:
1365 if (!pll->rate_table)
1366 init.ops = &samsung_pll46xx_clk_min_ops;
1367 else
1368 init.ops = &samsung_pll46xx_clk_ops;
1369 break;
1370 case pll_2550x:
1371 init.ops = &samsung_pll2550x_clk_ops;
1372 break;
1373 case pll_2550xx:
1374 if (!pll->rate_table)
1375 init.ops = &samsung_pll2550xx_clk_min_ops;
1376 else
1377 init.ops = &samsung_pll2550xx_clk_ops;
1378 break;
1379 case pll_2650x:
1380 if (!pll->rate_table)
1381 init.ops = &samsung_pll2650x_clk_min_ops;
1382 else
1383 init.ops = &samsung_pll2650x_clk_ops;
1384 break;
1385 case pll_2650xx:
1386 if (!pll->rate_table)
1387 init.ops = &samsung_pll2650xx_clk_min_ops;
1388 else
1389 init.ops = &samsung_pll2650xx_clk_ops;
1390 break;
1391 default:
1392 pr_warn("%s: Unknown pll type for pll clk %s\n",
1393 __func__, pll_clk->name);
1394 }
1395
1396 pll->hw.init = &init;
1397 pll->type = pll_clk->type;
1398 pll->lock_reg = ctx->reg_base + pll_clk->lock_offset;
1399 pll->con_reg = ctx->reg_base + pll_clk->con_offset;
1400
1401 ret = clk_hw_register(ctx->dev, &pll->hw);
1402 if (ret) {
1403 pr_err("%s: failed to register pll clock %s : %d\n",
1404 __func__, pll_clk->name, ret);
1405 kfree(pll->rate_table);
1406 kfree(pll);
1407 return;
1408 }
1409
1410 samsung_clk_add_lookup(ctx, &pll->hw, pll_clk->id);
1411 }
1412
samsung_clk_register_pll(struct samsung_clk_provider * ctx,const struct samsung_pll_clock * pll_list,unsigned int nr_pll)1413 void __init samsung_clk_register_pll(struct samsung_clk_provider *ctx,
1414 const struct samsung_pll_clock *pll_list,
1415 unsigned int nr_pll)
1416 {
1417 int cnt;
1418
1419 for (cnt = 0; cnt < nr_pll; cnt++)
1420 _samsung_clk_register_pll(ctx, &pll_list[cnt]);
1421 }
1422