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21330497 TL |
1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License as | |
4 | * published by the Free Software Foundation version 2. | |
5 | * | |
6 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
7 | * kind, whether express or implied; without even the implied warranty | |
8 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | */ | |
11 | ||
12 | #include <linux/clk.h> | |
13 | #include <linux/clkdev.h> | |
14 | #include <linux/clk-provider.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/math64.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of_device.h> | |
20 | #include <linux/string.h> | |
21 | ||
22 | #define ADPLL_PLLSS_MMR_LOCK_OFFSET 0x00 /* Managed by MPPULL */ | |
23 | #define ADPLL_PLLSS_MMR_LOCK_ENABLED 0x1f125B64 | |
24 | #define ADPLL_PLLSS_MMR_UNLOCK_MAGIC 0x1eda4c3d | |
25 | ||
26 | #define ADPLL_PWRCTRL_OFFSET 0x00 | |
27 | #define ADPLL_PWRCTRL_PONIN 5 | |
28 | #define ADPLL_PWRCTRL_PGOODIN 4 | |
29 | #define ADPLL_PWRCTRL_RET 3 | |
30 | #define ADPLL_PWRCTRL_ISORET 2 | |
31 | #define ADPLL_PWRCTRL_ISOSCAN 1 | |
32 | #define ADPLL_PWRCTRL_OFFMODE 0 | |
33 | ||
34 | #define ADPLL_CLKCTRL_OFFSET 0x04 | |
35 | #define ADPLL_CLKCTRL_CLKDCOLDOEN 29 | |
36 | #define ADPLL_CLKCTRL_IDLE 23 | |
37 | #define ADPLL_CLKCTRL_CLKOUTEN 20 | |
38 | #define ADPLL_CLKINPHIFSEL_ADPLL_S 19 /* REVISIT: which bit? */ | |
39 | #define ADPLL_CLKCTRL_CLKOUTLDOEN_ADPLL_LJ 19 | |
40 | #define ADPLL_CLKCTRL_ULOWCLKEN 18 | |
41 | #define ADPLL_CLKCTRL_CLKDCOLDOPWDNZ 17 | |
42 | #define ADPLL_CLKCTRL_M2PWDNZ 16 | |
43 | #define ADPLL_CLKCTRL_M3PWDNZ_ADPLL_S 15 | |
44 | #define ADPLL_CLKCTRL_LOWCURRSTDBY_ADPLL_S 13 | |
45 | #define ADPLL_CLKCTRL_LPMODE_ADPLL_S 12 | |
46 | #define ADPLL_CLKCTRL_REGM4XEN_ADPLL_S 10 | |
47 | #define ADPLL_CLKCTRL_SELFREQDCO_ADPLL_LJ 10 | |
48 | #define ADPLL_CLKCTRL_TINITZ 0 | |
49 | ||
50 | #define ADPLL_TENABLE_OFFSET 0x08 | |
51 | #define ADPLL_TENABLEDIV_OFFSET 0x8c | |
52 | ||
53 | #define ADPLL_M2NDIV_OFFSET 0x10 | |
54 | #define ADPLL_M2NDIV_M2 16 | |
55 | #define ADPLL_M2NDIV_M2_ADPLL_S_WIDTH 5 | |
56 | #define ADPLL_M2NDIV_M2_ADPLL_LJ_WIDTH 7 | |
57 | ||
58 | #define ADPLL_MN2DIV_OFFSET 0x14 | |
59 | #define ADPLL_MN2DIV_N2 16 | |
60 | ||
61 | #define ADPLL_FRACDIV_OFFSET 0x18 | |
62 | #define ADPLL_FRACDIV_REGSD 24 | |
63 | #define ADPLL_FRACDIV_FRACTIONALM 0 | |
64 | #define ADPLL_FRACDIV_FRACTIONALM_MASK 0x3ffff | |
65 | ||
66 | #define ADPLL_BWCTRL_OFFSET 0x1c | |
67 | #define ADPLL_BWCTRL_BWCONTROL 1 | |
68 | #define ADPLL_BWCTRL_BW_INCR_DECRZ 0 | |
69 | ||
70 | #define ADPLL_RESERVED_OFFSET 0x20 | |
71 | ||
72 | #define ADPLL_STATUS_OFFSET 0x24 | |
73 | #define ADPLL_STATUS_PONOUT 31 | |
74 | #define ADPLL_STATUS_PGOODOUT 30 | |
75 | #define ADPLL_STATUS_LDOPWDN 29 | |
76 | #define ADPLL_STATUS_RECAL_BSTATUS3 28 | |
77 | #define ADPLL_STATUS_RECAL_OPPIN 27 | |
78 | #define ADPLL_STATUS_PHASELOCK 10 | |
79 | #define ADPLL_STATUS_FREQLOCK 9 | |
80 | #define ADPLL_STATUS_BYPASSACK 8 | |
81 | #define ADPLL_STATUS_LOSSREF 6 | |
82 | #define ADPLL_STATUS_CLKOUTENACK 5 | |
83 | #define ADPLL_STATUS_LOCK2 4 | |
84 | #define ADPLL_STATUS_M2CHANGEACK 3 | |
85 | #define ADPLL_STATUS_HIGHJITTER 1 | |
86 | #define ADPLL_STATUS_BYPASS 0 | |
87 | #define ADPLL_STATUS_PREPARED_MASK (BIT(ADPLL_STATUS_PHASELOCK) | \ | |
88 | BIT(ADPLL_STATUS_FREQLOCK)) | |
89 | ||
90 | #define ADPLL_M3DIV_OFFSET 0x28 /* Only on MPUPLL */ | |
91 | #define ADPLL_M3DIV_M3 0 | |
92 | #define ADPLL_M3DIV_M3_WIDTH 5 | |
93 | #define ADPLL_M3DIV_M3_MASK 0x1f | |
94 | ||
95 | #define ADPLL_RAMPCTRL_OFFSET 0x2c /* Only on MPUPLL */ | |
96 | #define ADPLL_RAMPCTRL_CLKRAMPLEVEL 19 | |
97 | #define ADPLL_RAMPCTRL_CLKRAMPRATE 16 | |
98 | #define ADPLL_RAMPCTRL_RELOCK_RAMP_EN 0 | |
99 | ||
100 | #define MAX_ADPLL_INPUTS 3 | |
101 | #define MAX_ADPLL_OUTPUTS 4 | |
102 | #define ADPLL_MAX_RETRIES 5 | |
103 | ||
104 | #define to_dco(_hw) container_of(_hw, struct ti_adpll_dco_data, hw) | |
105 | #define to_adpll(_hw) container_of(_hw, struct ti_adpll_data, dco) | |
106 | #define to_clkout(_hw) container_of(_hw, struct ti_adpll_clkout_data, hw) | |
107 | ||
108 | enum ti_adpll_clocks { | |
109 | TI_ADPLL_DCO, | |
110 | TI_ADPLL_DCO_GATE, | |
111 | TI_ADPLL_N2, | |
112 | TI_ADPLL_M2, | |
113 | TI_ADPLL_M2_GATE, | |
114 | TI_ADPLL_BYPASS, | |
115 | TI_ADPLL_HIF, | |
116 | TI_ADPLL_DIV2, | |
117 | TI_ADPLL_CLKOUT, | |
118 | TI_ADPLL_CLKOUT2, | |
119 | TI_ADPLL_M3, | |
120 | }; | |
121 | ||
122 | #define TI_ADPLL_NR_CLOCKS (TI_ADPLL_M3 + 1) | |
123 | ||
124 | enum ti_adpll_inputs { | |
125 | TI_ADPLL_CLKINP, | |
126 | TI_ADPLL_CLKINPULOW, | |
127 | TI_ADPLL_CLKINPHIF, | |
128 | }; | |
129 | ||
130 | enum ti_adpll_s_outputs { | |
131 | TI_ADPLL_S_DCOCLKLDO, | |
132 | TI_ADPLL_S_CLKOUT, | |
133 | TI_ADPLL_S_CLKOUTX2, | |
134 | TI_ADPLL_S_CLKOUTHIF, | |
135 | }; | |
136 | ||
137 | enum ti_adpll_lj_outputs { | |
138 | TI_ADPLL_LJ_CLKDCOLDO, | |
139 | TI_ADPLL_LJ_CLKOUT, | |
140 | TI_ADPLL_LJ_CLKOUTLDO, | |
141 | }; | |
142 | ||
143 | struct ti_adpll_platform_data { | |
144 | const bool is_type_s; | |
145 | const int nr_max_inputs; | |
146 | const int nr_max_outputs; | |
147 | const int output_index; | |
148 | }; | |
149 | ||
150 | struct ti_adpll_clock { | |
151 | struct clk *clk; | |
152 | struct clk_lookup *cl; | |
153 | void (*unregister)(struct clk *clk); | |
154 | }; | |
155 | ||
156 | struct ti_adpll_dco_data { | |
157 | struct clk_hw hw; | |
158 | }; | |
159 | ||
160 | struct ti_adpll_clkout_data { | |
161 | struct ti_adpll_data *adpll; | |
162 | struct clk_gate gate; | |
163 | struct clk_hw hw; | |
164 | }; | |
165 | ||
166 | struct ti_adpll_data { | |
167 | struct device *dev; | |
168 | const struct ti_adpll_platform_data *c; | |
169 | struct device_node *np; | |
170 | unsigned long pa; | |
171 | void __iomem *iobase; | |
172 | void __iomem *regs; | |
173 | spinlock_t lock; /* For ADPLL shared register access */ | |
174 | const char *parent_names[MAX_ADPLL_INPUTS]; | |
175 | struct clk *parent_clocks[MAX_ADPLL_INPUTS]; | |
176 | struct ti_adpll_clock *clocks; | |
177 | struct clk_onecell_data outputs; | |
178 | struct ti_adpll_dco_data dco; | |
179 | }; | |
180 | ||
181 | static const char *ti_adpll_clk_get_name(struct ti_adpll_data *d, | |
182 | int output_index, | |
183 | const char *postfix) | |
184 | { | |
185 | const char *name; | |
186 | int err; | |
187 | ||
188 | if (output_index >= 0) { | |
189 | err = of_property_read_string_index(d->np, | |
190 | "clock-output-names", | |
191 | output_index, | |
192 | &name); | |
193 | if (err) | |
194 | return NULL; | |
195 | } else { | |
196 | const char *base_name = "adpll"; | |
197 | char *buf; | |
198 | ||
199 | buf = devm_kzalloc(d->dev, 8 + 1 + strlen(base_name) + 1 + | |
200 | strlen(postfix), GFP_KERNEL); | |
201 | if (!buf) | |
202 | return NULL; | |
203 | sprintf(buf, "%08lx.%s.%s", d->pa, base_name, postfix); | |
204 | name = buf; | |
205 | } | |
206 | ||
207 | return name; | |
208 | } | |
209 | ||
210 | #define ADPLL_MAX_CON_ID 16 /* See MAX_CON_ID */ | |
211 | ||
212 | static int ti_adpll_setup_clock(struct ti_adpll_data *d, struct clk *clock, | |
213 | int index, int output_index, const char *name, | |
214 | void (*unregister)(struct clk *clk)) | |
215 | { | |
216 | struct clk_lookup *cl; | |
217 | const char *postfix = NULL; | |
218 | char con_id[ADPLL_MAX_CON_ID]; | |
219 | ||
220 | d->clocks[index].clk = clock; | |
221 | d->clocks[index].unregister = unregister; | |
222 | ||
223 | /* Separate con_id in format "pll040dcoclkldo" to fit MAX_CON_ID */ | |
224 | postfix = strrchr(name, '.'); | |
225 | if (strlen(postfix) > 1) { | |
226 | if (strlen(postfix) > ADPLL_MAX_CON_ID) | |
227 | dev_warn(d->dev, "clock %s con_id lookup may fail\n", | |
228 | name); | |
229 | snprintf(con_id, 16, "pll%03lx%s", d->pa & 0xfff, postfix + 1); | |
230 | cl = clkdev_create(clock, con_id, NULL); | |
231 | if (!cl) | |
232 | return -ENOMEM; | |
233 | d->clocks[index].cl = cl; | |
234 | } else { | |
235 | dev_warn(d->dev, "no con_id for clock %s\n", name); | |
236 | } | |
237 | ||
238 | if (output_index < 0) | |
239 | return 0; | |
240 | ||
241 | d->outputs.clks[output_index] = clock; | |
242 | d->outputs.clk_num++; | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static int ti_adpll_init_divider(struct ti_adpll_data *d, | |
248 | enum ti_adpll_clocks index, | |
249 | int output_index, char *name, | |
250 | struct clk *parent_clock, | |
251 | void __iomem *reg, | |
252 | u8 shift, u8 width, | |
253 | u8 clk_divider_flags) | |
254 | { | |
255 | const char *child_name; | |
256 | const char *parent_name; | |
257 | struct clk *clock; | |
258 | ||
259 | child_name = ti_adpll_clk_get_name(d, output_index, name); | |
260 | if (!child_name) | |
261 | return -EINVAL; | |
262 | ||
263 | parent_name = __clk_get_name(parent_clock); | |
264 | clock = clk_register_divider(d->dev, child_name, parent_name, 0, | |
265 | reg, shift, width, clk_divider_flags, | |
266 | &d->lock); | |
267 | if (IS_ERR(clock)) { | |
268 | dev_err(d->dev, "failed to register divider %s: %li\n", | |
269 | name, PTR_ERR(clock)); | |
270 | return PTR_ERR(clock); | |
271 | } | |
272 | ||
273 | return ti_adpll_setup_clock(d, clock, index, output_index, child_name, | |
274 | clk_unregister_divider); | |
275 | } | |
276 | ||
277 | static int ti_adpll_init_mux(struct ti_adpll_data *d, | |
278 | enum ti_adpll_clocks index, | |
279 | char *name, struct clk *clk0, | |
280 | struct clk *clk1, | |
281 | void __iomem *reg, | |
282 | u8 shift) | |
283 | { | |
284 | const char *child_name; | |
285 | const char *parents[2]; | |
286 | struct clk *clock; | |
287 | ||
288 | child_name = ti_adpll_clk_get_name(d, -ENODEV, name); | |
289 | if (!child_name) | |
290 | return -ENOMEM; | |
291 | parents[0] = __clk_get_name(clk0); | |
292 | parents[1] = __clk_get_name(clk1); | |
293 | clock = clk_register_mux(d->dev, child_name, parents, 2, 0, | |
294 | reg, shift, 1, 0, &d->lock); | |
295 | if (IS_ERR(clock)) { | |
296 | dev_err(d->dev, "failed to register mux %s: %li\n", | |
297 | name, PTR_ERR(clock)); | |
298 | return PTR_ERR(clock); | |
299 | } | |
300 | ||
301 | return ti_adpll_setup_clock(d, clock, index, -ENODEV, child_name, | |
302 | clk_unregister_mux); | |
303 | } | |
304 | ||
305 | static int ti_adpll_init_gate(struct ti_adpll_data *d, | |
306 | enum ti_adpll_clocks index, | |
307 | int output_index, char *name, | |
308 | struct clk *parent_clock, | |
309 | void __iomem *reg, | |
310 | u8 bit_idx, | |
311 | u8 clk_gate_flags) | |
312 | { | |
313 | const char *child_name; | |
314 | const char *parent_name; | |
315 | struct clk *clock; | |
316 | ||
317 | child_name = ti_adpll_clk_get_name(d, output_index, name); | |
318 | if (!child_name) | |
319 | return -EINVAL; | |
320 | ||
321 | parent_name = __clk_get_name(parent_clock); | |
322 | clock = clk_register_gate(d->dev, child_name, parent_name, 0, | |
323 | reg, bit_idx, clk_gate_flags, | |
324 | &d->lock); | |
325 | if (IS_ERR(clock)) { | |
326 | dev_err(d->dev, "failed to register gate %s: %li\n", | |
327 | name, PTR_ERR(clock)); | |
328 | return PTR_ERR(clock); | |
329 | } | |
330 | ||
331 | return ti_adpll_setup_clock(d, clock, index, output_index, child_name, | |
332 | clk_unregister_gate); | |
333 | } | |
334 | ||
335 | static int ti_adpll_init_fixed_factor(struct ti_adpll_data *d, | |
336 | enum ti_adpll_clocks index, | |
337 | char *name, | |
338 | struct clk *parent_clock, | |
339 | unsigned int mult, | |
340 | unsigned int div) | |
341 | { | |
342 | const char *child_name; | |
343 | const char *parent_name; | |
344 | struct clk *clock; | |
345 | ||
346 | child_name = ti_adpll_clk_get_name(d, -ENODEV, name); | |
347 | if (!child_name) | |
348 | return -ENOMEM; | |
349 | ||
350 | parent_name = __clk_get_name(parent_clock); | |
351 | clock = clk_register_fixed_factor(d->dev, child_name, parent_name, | |
352 | 0, mult, div); | |
353 | if (IS_ERR(clock)) | |
354 | return PTR_ERR(clock); | |
355 | ||
356 | return ti_adpll_setup_clock(d, clock, index, -ENODEV, child_name, | |
357 | clk_unregister); | |
358 | } | |
359 | ||
360 | static void ti_adpll_set_idle_bypass(struct ti_adpll_data *d) | |
361 | { | |
362 | unsigned long flags; | |
363 | u32 v; | |
364 | ||
365 | spin_lock_irqsave(&d->lock, flags); | |
366 | v = readl_relaxed(d->regs + ADPLL_CLKCTRL_OFFSET); | |
367 | v |= BIT(ADPLL_CLKCTRL_IDLE); | |
368 | writel_relaxed(v, d->regs + ADPLL_CLKCTRL_OFFSET); | |
369 | spin_unlock_irqrestore(&d->lock, flags); | |
370 | } | |
371 | ||
372 | static void ti_adpll_clear_idle_bypass(struct ti_adpll_data *d) | |
373 | { | |
374 | unsigned long flags; | |
375 | u32 v; | |
376 | ||
377 | spin_lock_irqsave(&d->lock, flags); | |
378 | v = readl_relaxed(d->regs + ADPLL_CLKCTRL_OFFSET); | |
379 | v &= ~BIT(ADPLL_CLKCTRL_IDLE); | |
380 | writel_relaxed(v, d->regs + ADPLL_CLKCTRL_OFFSET); | |
381 | spin_unlock_irqrestore(&d->lock, flags); | |
382 | } | |
383 | ||
384 | static bool ti_adpll_clock_is_bypass(struct ti_adpll_data *d) | |
385 | { | |
386 | u32 v; | |
387 | ||
388 | v = readl_relaxed(d->regs + ADPLL_STATUS_OFFSET); | |
389 | ||
390 | return v & BIT(ADPLL_STATUS_BYPASS); | |
391 | } | |
392 | ||
393 | /* | |
394 | * Locked and bypass are not actually mutually exclusive: if you only care | |
395 | * about the DCO clock and not CLKOUT you can clear M2PWDNZ before enabling | |
396 | * the PLL, resulting in status (FREQLOCK | PHASELOCK | BYPASS) after lock. | |
397 | */ | |
398 | static bool ti_adpll_is_locked(struct ti_adpll_data *d) | |
399 | { | |
400 | u32 v = readl_relaxed(d->regs + ADPLL_STATUS_OFFSET); | |
401 | ||
402 | return (v & ADPLL_STATUS_PREPARED_MASK) == ADPLL_STATUS_PREPARED_MASK; | |
403 | } | |
404 | ||
405 | static int ti_adpll_wait_lock(struct ti_adpll_data *d) | |
406 | { | |
407 | int retries = ADPLL_MAX_RETRIES; | |
408 | ||
409 | do { | |
410 | if (ti_adpll_is_locked(d)) | |
411 | return 0; | |
412 | usleep_range(200, 300); | |
413 | } while (retries--); | |
414 | ||
415 | dev_err(d->dev, "pll failed to lock\n"); | |
416 | return -ETIMEDOUT; | |
417 | } | |
418 | ||
419 | static int ti_adpll_prepare(struct clk_hw *hw) | |
420 | { | |
421 | struct ti_adpll_dco_data *dco = to_dco(hw); | |
422 | struct ti_adpll_data *d = to_adpll(dco); | |
423 | ||
424 | ti_adpll_clear_idle_bypass(d); | |
425 | ti_adpll_wait_lock(d); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | static void ti_adpll_unprepare(struct clk_hw *hw) | |
431 | { | |
432 | struct ti_adpll_dco_data *dco = to_dco(hw); | |
433 | struct ti_adpll_data *d = to_adpll(dco); | |
434 | ||
435 | ti_adpll_set_idle_bypass(d); | |
436 | } | |
437 | ||
438 | static int ti_adpll_is_prepared(struct clk_hw *hw) | |
439 | { | |
440 | struct ti_adpll_dco_data *dco = to_dco(hw); | |
441 | struct ti_adpll_data *d = to_adpll(dco); | |
442 | ||
443 | return ti_adpll_is_locked(d); | |
444 | } | |
445 | ||
446 | /* | |
447 | * Note that the DCO clock is never subject to bypass: if the PLL is off, | |
448 | * dcoclk is low. | |
449 | */ | |
450 | static unsigned long ti_adpll_recalc_rate(struct clk_hw *hw, | |
451 | unsigned long parent_rate) | |
452 | { | |
453 | struct ti_adpll_dco_data *dco = to_dco(hw); | |
454 | struct ti_adpll_data *d = to_adpll(dco); | |
455 | u32 frac_m, divider, v; | |
456 | u64 rate; | |
457 | unsigned long flags; | |
458 | ||
459 | if (ti_adpll_clock_is_bypass(d)) | |
460 | return 0; | |
461 | ||
462 | spin_lock_irqsave(&d->lock, flags); | |
463 | frac_m = readl_relaxed(d->regs + ADPLL_FRACDIV_OFFSET); | |
464 | frac_m &= ADPLL_FRACDIV_FRACTIONALM_MASK; | |
8a8b6eb7 | 465 | rate = (u64)readw_relaxed(d->regs + ADPLL_MN2DIV_OFFSET) << 18; |
21330497 TL |
466 | rate += frac_m; |
467 | rate *= parent_rate; | |
468 | divider = (readw_relaxed(d->regs + ADPLL_M2NDIV_OFFSET) + 1) << 18; | |
469 | spin_unlock_irqrestore(&d->lock, flags); | |
470 | ||
471 | do_div(rate, divider); | |
472 | ||
473 | if (d->c->is_type_s) { | |
474 | v = readl_relaxed(d->regs + ADPLL_CLKCTRL_OFFSET); | |
475 | if (v & BIT(ADPLL_CLKCTRL_REGM4XEN_ADPLL_S)) | |
476 | rate *= 4; | |
477 | rate *= 2; | |
478 | } | |
479 | ||
480 | return rate; | |
481 | } | |
482 | ||
483 | /* PLL parent is always clkinp, bypass only affects the children */ | |
484 | static u8 ti_adpll_get_parent(struct clk_hw *hw) | |
485 | { | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static struct clk_ops ti_adpll_ops = { | |
490 | .prepare = ti_adpll_prepare, | |
491 | .unprepare = ti_adpll_unprepare, | |
492 | .is_prepared = ti_adpll_is_prepared, | |
493 | .recalc_rate = ti_adpll_recalc_rate, | |
494 | .get_parent = ti_adpll_get_parent, | |
495 | }; | |
496 | ||
497 | static int ti_adpll_init_dco(struct ti_adpll_data *d) | |
498 | { | |
499 | struct clk_init_data init; | |
500 | struct clk *clock; | |
501 | const char *postfix; | |
502 | int width, err; | |
503 | ||
504 | d->outputs.clks = devm_kzalloc(d->dev, sizeof(struct clk *) * | |
505 | MAX_ADPLL_OUTPUTS, | |
506 | GFP_KERNEL); | |
507 | if (!d->outputs.clks) | |
508 | return -ENOMEM; | |
509 | ||
510 | if (d->c->output_index < 0) | |
511 | postfix = "dco"; | |
512 | else | |
513 | postfix = NULL; | |
514 | ||
515 | init.name = ti_adpll_clk_get_name(d, d->c->output_index, postfix); | |
516 | if (!init.name) | |
517 | return -EINVAL; | |
518 | ||
519 | init.parent_names = d->parent_names; | |
520 | init.num_parents = d->c->nr_max_inputs; | |
521 | init.ops = &ti_adpll_ops; | |
522 | init.flags = CLK_GET_RATE_NOCACHE; | |
523 | d->dco.hw.init = &init; | |
524 | ||
525 | if (d->c->is_type_s) | |
526 | width = 5; | |
527 | else | |
528 | width = 4; | |
529 | ||
530 | /* Internal input clock divider N2 */ | |
531 | err = ti_adpll_init_divider(d, TI_ADPLL_N2, -ENODEV, "n2", | |
532 | d->parent_clocks[TI_ADPLL_CLKINP], | |
533 | d->regs + ADPLL_MN2DIV_OFFSET, | |
534 | ADPLL_MN2DIV_N2, width, 0); | |
535 | if (err) | |
536 | return err; | |
537 | ||
538 | clock = devm_clk_register(d->dev, &d->dco.hw); | |
539 | if (IS_ERR(clock)) | |
540 | return PTR_ERR(clock); | |
541 | ||
542 | return ti_adpll_setup_clock(d, clock, TI_ADPLL_DCO, d->c->output_index, | |
543 | init.name, NULL); | |
544 | } | |
545 | ||
546 | static int ti_adpll_clkout_enable(struct clk_hw *hw) | |
547 | { | |
548 | struct ti_adpll_clkout_data *co = to_clkout(hw); | |
549 | struct clk_hw *gate_hw = &co->gate.hw; | |
550 | ||
551 | __clk_hw_set_clk(gate_hw, hw); | |
552 | ||
553 | return clk_gate_ops.enable(gate_hw); | |
554 | } | |
555 | ||
556 | static void ti_adpll_clkout_disable(struct clk_hw *hw) | |
557 | { | |
558 | struct ti_adpll_clkout_data *co = to_clkout(hw); | |
559 | struct clk_hw *gate_hw = &co->gate.hw; | |
560 | ||
561 | __clk_hw_set_clk(gate_hw, hw); | |
562 | clk_gate_ops.disable(gate_hw); | |
563 | } | |
564 | ||
565 | static int ti_adpll_clkout_is_enabled(struct clk_hw *hw) | |
566 | { | |
567 | struct ti_adpll_clkout_data *co = to_clkout(hw); | |
568 | struct clk_hw *gate_hw = &co->gate.hw; | |
569 | ||
570 | __clk_hw_set_clk(gate_hw, hw); | |
571 | ||
572 | return clk_gate_ops.is_enabled(gate_hw); | |
573 | } | |
574 | ||
575 | /* Setting PLL bypass puts clkout and clkoutx2 into bypass */ | |
576 | static u8 ti_adpll_clkout_get_parent(struct clk_hw *hw) | |
577 | { | |
578 | struct ti_adpll_clkout_data *co = to_clkout(hw); | |
579 | struct ti_adpll_data *d = co->adpll; | |
580 | ||
581 | return ti_adpll_clock_is_bypass(d); | |
582 | } | |
583 | ||
584 | static int ti_adpll_init_clkout(struct ti_adpll_data *d, | |
585 | enum ti_adpll_clocks index, | |
586 | int output_index, int gate_bit, | |
587 | char *name, struct clk *clk0, | |
588 | struct clk *clk1) | |
589 | { | |
590 | struct ti_adpll_clkout_data *co; | |
591 | struct clk_init_data init; | |
592 | struct clk_ops *ops; | |
593 | const char *parent_names[2]; | |
594 | const char *child_name; | |
595 | struct clk *clock; | |
596 | int err; | |
597 | ||
598 | co = devm_kzalloc(d->dev, sizeof(*co), GFP_KERNEL); | |
599 | if (!co) | |
600 | return -ENOMEM; | |
601 | co->adpll = d; | |
602 | ||
603 | err = of_property_read_string_index(d->np, | |
604 | "clock-output-names", | |
605 | output_index, | |
606 | &child_name); | |
607 | if (err) | |
608 | return err; | |
609 | ||
610 | ops = devm_kzalloc(d->dev, sizeof(*ops), GFP_KERNEL); | |
611 | if (!ops) | |
612 | return -ENOMEM; | |
613 | ||
614 | init.name = child_name; | |
615 | init.ops = ops; | |
616 | init.flags = CLK_IS_BASIC; | |
617 | co->hw.init = &init; | |
618 | parent_names[0] = __clk_get_name(clk0); | |
619 | parent_names[1] = __clk_get_name(clk1); | |
620 | init.parent_names = parent_names; | |
621 | init.num_parents = 2; | |
622 | ||
623 | ops->get_parent = ti_adpll_clkout_get_parent; | |
624 | ops->determine_rate = __clk_mux_determine_rate; | |
625 | if (gate_bit) { | |
626 | co->gate.lock = &d->lock; | |
627 | co->gate.reg = d->regs + ADPLL_CLKCTRL_OFFSET; | |
628 | co->gate.bit_idx = gate_bit; | |
629 | ops->enable = ti_adpll_clkout_enable; | |
630 | ops->disable = ti_adpll_clkout_disable; | |
631 | ops->is_enabled = ti_adpll_clkout_is_enabled; | |
632 | } | |
633 | ||
634 | clock = devm_clk_register(d->dev, &co->hw); | |
635 | if (IS_ERR(clock)) { | |
636 | dev_err(d->dev, "failed to register output %s: %li\n", | |
637 | name, PTR_ERR(clock)); | |
638 | return PTR_ERR(clock); | |
639 | } | |
640 | ||
641 | return ti_adpll_setup_clock(d, clock, index, output_index, child_name, | |
642 | NULL); | |
643 | } | |
644 | ||
645 | static int ti_adpll_init_children_adpll_s(struct ti_adpll_data *d) | |
646 | { | |
647 | int err; | |
648 | ||
649 | if (!d->c->is_type_s) | |
650 | return 0; | |
651 | ||
652 | /* Internal mux, sources from divider N2 or clkinpulow */ | |
653 | err = ti_adpll_init_mux(d, TI_ADPLL_BYPASS, "bypass", | |
654 | d->clocks[TI_ADPLL_N2].clk, | |
655 | d->parent_clocks[TI_ADPLL_CLKINPULOW], | |
656 | d->regs + ADPLL_CLKCTRL_OFFSET, | |
657 | ADPLL_CLKCTRL_ULOWCLKEN); | |
658 | if (err) | |
659 | return err; | |
660 | ||
661 | /* Internal divider M2, sources DCO */ | |
662 | err = ti_adpll_init_divider(d, TI_ADPLL_M2, -ENODEV, "m2", | |
663 | d->clocks[TI_ADPLL_DCO].clk, | |
664 | d->regs + ADPLL_M2NDIV_OFFSET, | |
665 | ADPLL_M2NDIV_M2, | |
666 | ADPLL_M2NDIV_M2_ADPLL_S_WIDTH, | |
667 | CLK_DIVIDER_ONE_BASED); | |
668 | if (err) | |
669 | return err; | |
670 | ||
671 | /* Internal fixed divider, after M2 before clkout */ | |
672 | err = ti_adpll_init_fixed_factor(d, TI_ADPLL_DIV2, "div2", | |
673 | d->clocks[TI_ADPLL_M2].clk, | |
674 | 1, 2); | |
675 | if (err) | |
676 | return err; | |
677 | ||
678 | /* Output clkout with a mux and gate, sources from div2 or bypass */ | |
679 | err = ti_adpll_init_clkout(d, TI_ADPLL_CLKOUT, TI_ADPLL_S_CLKOUT, | |
680 | ADPLL_CLKCTRL_CLKOUTEN, "clkout", | |
681 | d->clocks[TI_ADPLL_DIV2].clk, | |
682 | d->clocks[TI_ADPLL_BYPASS].clk); | |
683 | if (err) | |
684 | return err; | |
685 | ||
686 | /* Output clkoutx2 with a mux and gate, sources from M2 or bypass */ | |
687 | err = ti_adpll_init_clkout(d, TI_ADPLL_CLKOUT2, TI_ADPLL_S_CLKOUTX2, 0, | |
688 | "clkout2", d->clocks[TI_ADPLL_M2].clk, | |
689 | d->clocks[TI_ADPLL_BYPASS].clk); | |
690 | if (err) | |
691 | return err; | |
692 | ||
693 | /* Internal mux, sources from DCO and clkinphif */ | |
694 | if (d->parent_clocks[TI_ADPLL_CLKINPHIF]) { | |
695 | err = ti_adpll_init_mux(d, TI_ADPLL_HIF, "hif", | |
696 | d->clocks[TI_ADPLL_DCO].clk, | |
697 | d->parent_clocks[TI_ADPLL_CLKINPHIF], | |
698 | d->regs + ADPLL_CLKCTRL_OFFSET, | |
699 | ADPLL_CLKINPHIFSEL_ADPLL_S); | |
700 | if (err) | |
701 | return err; | |
702 | } | |
703 | ||
704 | /* Output clkouthif with a divider M3, sources from hif */ | |
705 | err = ti_adpll_init_divider(d, TI_ADPLL_M3, TI_ADPLL_S_CLKOUTHIF, "m3", | |
706 | d->clocks[TI_ADPLL_HIF].clk, | |
707 | d->regs + ADPLL_M3DIV_OFFSET, | |
708 | ADPLL_M3DIV_M3, | |
709 | ADPLL_M3DIV_M3_WIDTH, | |
710 | CLK_DIVIDER_ONE_BASED); | |
711 | if (err) | |
712 | return err; | |
713 | ||
714 | /* Output clock dcoclkldo is the DCO */ | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
719 | static int ti_adpll_init_children_adpll_lj(struct ti_adpll_data *d) | |
720 | { | |
721 | int err; | |
722 | ||
723 | if (d->c->is_type_s) | |
724 | return 0; | |
725 | ||
726 | /* Output clkdcoldo, gated output of DCO */ | |
727 | err = ti_adpll_init_gate(d, TI_ADPLL_DCO_GATE, TI_ADPLL_LJ_CLKDCOLDO, | |
728 | "clkdcoldo", d->clocks[TI_ADPLL_DCO].clk, | |
729 | d->regs + ADPLL_CLKCTRL_OFFSET, | |
730 | ADPLL_CLKCTRL_CLKDCOLDOEN, 0); | |
731 | if (err) | |
732 | return err; | |
733 | ||
734 | /* Internal divider M2, sources from DCO */ | |
735 | err = ti_adpll_init_divider(d, TI_ADPLL_M2, -ENODEV, | |
736 | "m2", d->clocks[TI_ADPLL_DCO].clk, | |
737 | d->regs + ADPLL_M2NDIV_OFFSET, | |
738 | ADPLL_M2NDIV_M2, | |
739 | ADPLL_M2NDIV_M2_ADPLL_LJ_WIDTH, | |
740 | CLK_DIVIDER_ONE_BASED); | |
741 | if (err) | |
742 | return err; | |
743 | ||
744 | /* Output clkoutldo, gated output of M2 */ | |
745 | err = ti_adpll_init_gate(d, TI_ADPLL_M2_GATE, TI_ADPLL_LJ_CLKOUTLDO, | |
746 | "clkoutldo", d->clocks[TI_ADPLL_M2].clk, | |
747 | d->regs + ADPLL_CLKCTRL_OFFSET, | |
748 | ADPLL_CLKCTRL_CLKOUTLDOEN_ADPLL_LJ, | |
749 | 0); | |
750 | if (err) | |
751 | return err; | |
752 | ||
753 | /* Internal mux, sources from divider N2 or clkinpulow */ | |
754 | err = ti_adpll_init_mux(d, TI_ADPLL_BYPASS, "bypass", | |
755 | d->clocks[TI_ADPLL_N2].clk, | |
756 | d->parent_clocks[TI_ADPLL_CLKINPULOW], | |
757 | d->regs + ADPLL_CLKCTRL_OFFSET, | |
758 | ADPLL_CLKCTRL_ULOWCLKEN); | |
759 | if (err) | |
760 | return err; | |
761 | ||
762 | /* Output clkout, sources M2 or bypass */ | |
763 | err = ti_adpll_init_clkout(d, TI_ADPLL_CLKOUT, TI_ADPLL_S_CLKOUT, | |
764 | ADPLL_CLKCTRL_CLKOUTEN, "clkout", | |
765 | d->clocks[TI_ADPLL_M2].clk, | |
766 | d->clocks[TI_ADPLL_BYPASS].clk); | |
767 | if (err) | |
768 | return err; | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | static void ti_adpll_free_resources(struct ti_adpll_data *d) | |
774 | { | |
775 | int i; | |
776 | ||
777 | for (i = TI_ADPLL_M3; i >= 0; i--) { | |
778 | struct ti_adpll_clock *ac = &d->clocks[i]; | |
779 | ||
780 | if (!ac || IS_ERR_OR_NULL(ac->clk)) | |
781 | continue; | |
782 | if (ac->cl) | |
783 | clkdev_drop(ac->cl); | |
784 | if (ac->unregister) | |
785 | ac->unregister(ac->clk); | |
786 | } | |
787 | } | |
788 | ||
789 | /* MPU PLL manages the lock register for all PLLs */ | |
790 | static void ti_adpll_unlock_all(void __iomem *reg) | |
791 | { | |
792 | u32 v; | |
793 | ||
794 | v = readl_relaxed(reg); | |
795 | if (v == ADPLL_PLLSS_MMR_LOCK_ENABLED) | |
796 | writel_relaxed(ADPLL_PLLSS_MMR_UNLOCK_MAGIC, reg); | |
797 | } | |
798 | ||
799 | static int ti_adpll_init_registers(struct ti_adpll_data *d) | |
800 | { | |
801 | int register_offset = 0; | |
802 | ||
803 | if (d->c->is_type_s) { | |
804 | register_offset = 8; | |
805 | ti_adpll_unlock_all(d->iobase + ADPLL_PLLSS_MMR_LOCK_OFFSET); | |
806 | } | |
807 | ||
808 | d->regs = d->iobase + register_offset + ADPLL_PWRCTRL_OFFSET; | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | static int ti_adpll_init_inputs(struct ti_adpll_data *d) | |
814 | { | |
815 | const char *error = "need at least %i inputs"; | |
816 | struct clk *clock; | |
817 | int nr_inputs; | |
818 | ||
819 | nr_inputs = of_clk_get_parent_count(d->np); | |
820 | if (nr_inputs < d->c->nr_max_inputs) { | |
821 | dev_err(d->dev, error, nr_inputs); | |
822 | return -EINVAL; | |
823 | } | |
824 | of_clk_parent_fill(d->np, d->parent_names, nr_inputs); | |
825 | ||
826 | clock = devm_clk_get(d->dev, d->parent_names[0]); | |
827 | if (IS_ERR(clock)) { | |
828 | dev_err(d->dev, "could not get clkinp\n"); | |
829 | return PTR_ERR(clock); | |
830 | } | |
831 | d->parent_clocks[TI_ADPLL_CLKINP] = clock; | |
832 | ||
833 | clock = devm_clk_get(d->dev, d->parent_names[1]); | |
834 | if (IS_ERR(clock)) { | |
835 | dev_err(d->dev, "could not get clkinpulow clock\n"); | |
836 | return PTR_ERR(clock); | |
837 | } | |
838 | d->parent_clocks[TI_ADPLL_CLKINPULOW] = clock; | |
839 | ||
840 | if (d->c->is_type_s) { | |
841 | clock = devm_clk_get(d->dev, d->parent_names[2]); | |
842 | if (IS_ERR(clock)) { | |
843 | dev_err(d->dev, "could not get clkinphif clock\n"); | |
844 | return PTR_ERR(clock); | |
845 | } | |
846 | d->parent_clocks[TI_ADPLL_CLKINPHIF] = clock; | |
847 | } | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static const struct ti_adpll_platform_data ti_adpll_type_s = { | |
853 | .is_type_s = true, | |
854 | .nr_max_inputs = MAX_ADPLL_INPUTS, | |
855 | .nr_max_outputs = MAX_ADPLL_OUTPUTS, | |
856 | .output_index = TI_ADPLL_S_DCOCLKLDO, | |
857 | }; | |
858 | ||
859 | static const struct ti_adpll_platform_data ti_adpll_type_lj = { | |
860 | .is_type_s = false, | |
861 | .nr_max_inputs = MAX_ADPLL_INPUTS - 1, | |
862 | .nr_max_outputs = MAX_ADPLL_OUTPUTS - 1, | |
863 | .output_index = -EINVAL, | |
864 | }; | |
865 | ||
866 | static const struct of_device_id ti_adpll_match[] = { | |
867 | { .compatible = "ti,dm814-adpll-s-clock", &ti_adpll_type_s }, | |
868 | { .compatible = "ti,dm814-adpll-lj-clock", &ti_adpll_type_lj }, | |
869 | {}, | |
870 | }; | |
871 | MODULE_DEVICE_TABLE(of, ti_adpll_match); | |
872 | ||
873 | static int ti_adpll_probe(struct platform_device *pdev) | |
874 | { | |
875 | struct device_node *node = pdev->dev.of_node; | |
876 | struct device *dev = &pdev->dev; | |
877 | const struct of_device_id *match; | |
878 | const struct ti_adpll_platform_data *pdata; | |
879 | struct ti_adpll_data *d; | |
880 | struct resource *res; | |
881 | int err; | |
882 | ||
883 | match = of_match_device(ti_adpll_match, dev); | |
884 | if (match) | |
885 | pdata = match->data; | |
886 | else | |
887 | return -ENODEV; | |
888 | ||
889 | d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); | |
890 | if (!d) | |
891 | return -ENOMEM; | |
892 | d->dev = dev; | |
893 | d->np = node; | |
894 | d->c = pdata; | |
895 | dev_set_drvdata(d->dev, d); | |
896 | spin_lock_init(&d->lock); | |
897 | ||
898 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
899 | if (!res) | |
900 | return -ENODEV; | |
901 | d->pa = res->start; | |
902 | ||
903 | d->iobase = devm_ioremap_resource(dev, res); | |
904 | if (IS_ERR(d->iobase)) { | |
905 | dev_err(dev, "could not get IO base: %li\n", | |
906 | PTR_ERR(d->iobase)); | |
907 | return PTR_ERR(d->iobase); | |
908 | } | |
909 | ||
910 | err = ti_adpll_init_registers(d); | |
911 | if (err) | |
912 | return err; | |
913 | ||
914 | err = ti_adpll_init_inputs(d); | |
915 | if (err) | |
916 | return err; | |
917 | ||
918 | d->clocks = devm_kzalloc(d->dev, sizeof(struct ti_adpll_clock) * | |
919 | TI_ADPLL_NR_CLOCKS, | |
920 | GFP_KERNEL); | |
921 | if (!d->clocks) | |
8a8b6eb7 | 922 | return -ENOMEM; |
21330497 TL |
923 | |
924 | err = ti_adpll_init_dco(d); | |
925 | if (err) { | |
926 | dev_err(dev, "could not register dco: %i\n", err); | |
927 | goto free; | |
928 | } | |
929 | ||
930 | err = ti_adpll_init_children_adpll_s(d); | |
931 | if (err) | |
932 | goto free; | |
933 | err = ti_adpll_init_children_adpll_lj(d); | |
934 | if (err) | |
935 | goto free; | |
936 | ||
937 | err = of_clk_add_provider(d->np, of_clk_src_onecell_get, &d->outputs); | |
938 | if (err) | |
939 | goto free; | |
940 | ||
941 | return 0; | |
942 | ||
943 | free: | |
944 | WARN_ON(1); | |
945 | ti_adpll_free_resources(d); | |
946 | ||
947 | return err; | |
948 | } | |
949 | ||
950 | static int ti_adpll_remove(struct platform_device *pdev) | |
951 | { | |
952 | struct ti_adpll_data *d = dev_get_drvdata(&pdev->dev); | |
953 | ||
954 | ti_adpll_free_resources(d); | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
959 | static struct platform_driver ti_adpll_driver = { | |
960 | .driver = { | |
961 | .name = "ti-adpll", | |
962 | .of_match_table = ti_adpll_match, | |
963 | }, | |
964 | .probe = ti_adpll_probe, | |
965 | .remove = ti_adpll_remove, | |
966 | }; | |
967 | ||
968 | static int __init ti_adpll_init(void) | |
969 | { | |
970 | return platform_driver_register(&ti_adpll_driver); | |
971 | } | |
972 | core_initcall(ti_adpll_init); | |
973 | ||
974 | static void __exit ti_adpll_exit(void) | |
975 | { | |
976 | platform_driver_unregister(&ti_adpll_driver); | |
977 | } | |
978 | module_exit(ti_adpll_exit); | |
979 | ||
980 | MODULE_DESCRIPTION("Clock driver for dm814x ADPLL"); | |
981 | MODULE_ALIAS("platform:dm814-adpll-clock"); | |
982 | MODULE_AUTHOR("Tony LIndgren <tony@atomide.com>"); | |
983 | MODULE_LICENSE("GPL v2"); |