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target/mips: Use an exception for semihosting
[qemu/kevin.git] / hw / misc / npcm7xx_clk.c
blobbc2b879feb5d1f9871ecabdf289a6427da830e8f
1 /*
2 * Nuvoton NPCM7xx Clock Control Registers.
3 *
4 * Copyright 2020 Google LLC
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * for more details.
15 */
16
17 #include "qemu/osdep.h"
18
19 #include "hw/misc/npcm7xx_clk.h"
20 #include "hw/timer/npcm7xx_timer.h"
21 #include "hw/qdev-clock.h"
22 #include "migration/vmstate.h"
23 #include "qemu/error-report.h"
24 #include "qemu/log.h"
25 #include "qemu/module.h"
26 #include "qemu/timer.h"
27 #include "qemu/units.h"
28 #include "trace.h"
29 #include "sysemu/watchdog.h"
30
31 /*
32 * The reference clock hz, and the SECCNT and CNTR25M registers in this module,
33 * is always 25 MHz.
34 */
35 #define NPCM7XX_CLOCK_REF_HZ (25000000)
36
37 /* Register Field Definitions */
38 #define NPCM7XX_CLK_WDRCR_CA9C BIT(0) /* Cortex-A9 Cores */
39
40 #define PLLCON_LOKI BIT(31)
41 #define PLLCON_LOKS BIT(30)
42 #define PLLCON_PWDEN BIT(12)
43 #define PLLCON_FBDV(con) extract32((con), 16, 12)
44 #define PLLCON_OTDV2(con) extract32((con), 13, 3)
45 #define PLLCON_OTDV1(con) extract32((con), 8, 3)
46 #define PLLCON_INDV(con) extract32((con), 0, 6)
47
48 enum NPCM7xxCLKRegisters {
49 NPCM7XX_CLK_CLKEN1,
50 NPCM7XX_CLK_CLKSEL,
51 NPCM7XX_CLK_CLKDIV1,
52 NPCM7XX_CLK_PLLCON0,
53 NPCM7XX_CLK_PLLCON1,
54 NPCM7XX_CLK_SWRSTR,
55 NPCM7XX_CLK_IPSRST1 = 0x20 / sizeof(uint32_t),
56 NPCM7XX_CLK_IPSRST2,
57 NPCM7XX_CLK_CLKEN2,
58 NPCM7XX_CLK_CLKDIV2,
59 NPCM7XX_CLK_CLKEN3,
60 NPCM7XX_CLK_IPSRST3,
61 NPCM7XX_CLK_WD0RCR,
62 NPCM7XX_CLK_WD1RCR,
63 NPCM7XX_CLK_WD2RCR,
64 NPCM7XX_CLK_SWRSTC1,
65 NPCM7XX_CLK_SWRSTC2,
66 NPCM7XX_CLK_SWRSTC3,
67 NPCM7XX_CLK_SWRSTC4,
68 NPCM7XX_CLK_PLLCON2,
69 NPCM7XX_CLK_CLKDIV3,
70 NPCM7XX_CLK_CORSTC,
71 NPCM7XX_CLK_PLLCONG,
72 NPCM7XX_CLK_AHBCKFI,
73 NPCM7XX_CLK_SECCNT,
74 NPCM7XX_CLK_CNTR25M,
75 NPCM7XX_CLK_REGS_END,
76 };
77
78 /*
79 * These reset values were taken from version 0.91 of the NPCM750R data sheet.
80 *
81 * All are loaded on power-up reset. CLKENx and SWRSTR should also be loaded on
82 * core domain reset, but this reset type is not yet supported by QEMU.
83 */
84 static const uint32_t cold_reset_values[NPCM7XX_CLK_NR_REGS] = {
85 [NPCM7XX_CLK_CLKEN1] = 0xffffffff,
86 [NPCM7XX_CLK_CLKSEL] = 0x004aaaaa,
87 [NPCM7XX_CLK_CLKDIV1] = 0x5413f855,
88 [NPCM7XX_CLK_PLLCON0] = 0x00222101 | PLLCON_LOKI,
89 [NPCM7XX_CLK_PLLCON1] = 0x00202101 | PLLCON_LOKI,
90 [NPCM7XX_CLK_IPSRST1] = 0x00001000,
91 [NPCM7XX_CLK_IPSRST2] = 0x80000000,
92 [NPCM7XX_CLK_CLKEN2] = 0xffffffff,
93 [NPCM7XX_CLK_CLKDIV2] = 0xaa4f8f9f,
94 [NPCM7XX_CLK_CLKEN3] = 0xffffffff,
95 [NPCM7XX_CLK_IPSRST3] = 0x03000000,
96 [NPCM7XX_CLK_WD0RCR] = 0xffffffff,
97 [NPCM7XX_CLK_WD1RCR] = 0xffffffff,
98 [NPCM7XX_CLK_WD2RCR] = 0xffffffff,
99 [NPCM7XX_CLK_SWRSTC1] = 0x00000003,
100 [NPCM7XX_CLK_PLLCON2] = 0x00c02105 | PLLCON_LOKI,
101 [NPCM7XX_CLK_CORSTC] = 0x04000003,
102 [NPCM7XX_CLK_PLLCONG] = 0x01228606 | PLLCON_LOKI,
103 [NPCM7XX_CLK_AHBCKFI] = 0x000000c8,
104 };
105
106 /* The number of watchdogs that can trigger a reset. */
107 #define NPCM7XX_NR_WATCHDOGS (3)
108
109 /* Clock converter functions */
110
111 #define TYPE_NPCM7XX_CLOCK_PLL "npcm7xx-clock-pll"
112 #define NPCM7XX_CLOCK_PLL(obj) OBJECT_CHECK(NPCM7xxClockPLLState, \
113 (obj), TYPE_NPCM7XX_CLOCK_PLL)
114 #define TYPE_NPCM7XX_CLOCK_SEL "npcm7xx-clock-sel"
115 #define NPCM7XX_CLOCK_SEL(obj) OBJECT_CHECK(NPCM7xxClockSELState, \
116 (obj), TYPE_NPCM7XX_CLOCK_SEL)
117 #define TYPE_NPCM7XX_CLOCK_DIVIDER "npcm7xx-clock-divider"
118 #define NPCM7XX_CLOCK_DIVIDER(obj) OBJECT_CHECK(NPCM7xxClockDividerState, \
119 (obj), TYPE_NPCM7XX_CLOCK_DIVIDER)
120
121 static void npcm7xx_clk_update_pll(void *opaque)
122 {
123 NPCM7xxClockPLLState *s = opaque;
124 uint32_t con = s->clk->regs[s->reg];
125 uint64_t freq;
126
127 /* The PLL is grounded if it is not locked yet. */
128 if (con & PLLCON_LOKI) {
129 freq = clock_get_hz(s->clock_in);
130 freq *= PLLCON_FBDV(con);
131 freq /= PLLCON_INDV(con) * PLLCON_OTDV1(con) * PLLCON_OTDV2(con);
132 } else {
133 freq = 0;
134 }
135
136 clock_update_hz(s->clock_out, freq);
137 }
138
139 static void npcm7xx_clk_update_sel(void *opaque)
140 {
141 NPCM7xxClockSELState *s = opaque;
142 uint32_t index = extract32(s->clk->regs[NPCM7XX_CLK_CLKSEL], s->offset,
143 s->len);
144
145 if (index >= s->input_size) {
146 qemu_log_mask(LOG_GUEST_ERROR,
147 "%s: SEL index: %u out of range\n",
148 __func__, index);
149 index = 0;
150 }
151 clock_update_hz(s->clock_out, clock_get_hz(s->clock_in[index]));
152 }
153
154 static void npcm7xx_clk_update_divider(void *opaque)
155 {
156 NPCM7xxClockDividerState *s = opaque;
157 uint32_t freq;
158
159 freq = s->divide(s);
160 clock_update_hz(s->clock_out, freq);
161 }
162
163 static uint32_t divide_by_constant(NPCM7xxClockDividerState *s)
164 {
165 return clock_get_hz(s->clock_in) / s->divisor;
166 }
167
168 static uint32_t divide_by_reg_divisor(NPCM7xxClockDividerState *s)
169 {
170 return clock_get_hz(s->clock_in) /
171 (extract32(s->clk->regs[s->reg], s->offset, s->len) + 1);
172 }
173
174 static uint32_t divide_by_reg_divisor_times_2(NPCM7xxClockDividerState *s)
175 {
176 return divide_by_reg_divisor(s) / 2;
177 }
178
179 static uint32_t shift_by_reg_divisor(NPCM7xxClockDividerState *s)
180 {
181 return clock_get_hz(s->clock_in) >>
182 extract32(s->clk->regs[s->reg], s->offset, s->len);
183 }
184
185 static NPCM7xxClockPLL find_pll_by_reg(enum NPCM7xxCLKRegisters reg)
186 {
187 switch (reg) {
188 case NPCM7XX_CLK_PLLCON0:
189 return NPCM7XX_CLOCK_PLL0;
190 case NPCM7XX_CLK_PLLCON1:
191 return NPCM7XX_CLOCK_PLL1;
192 case NPCM7XX_CLK_PLLCON2:
193 return NPCM7XX_CLOCK_PLL2;
194 case NPCM7XX_CLK_PLLCONG:
195 return NPCM7XX_CLOCK_PLLG;
196 default:
197 g_assert_not_reached();
198 }
199 }
200
201 static void npcm7xx_clk_update_all_plls(NPCM7xxCLKState *clk)
202 {
203 int i;
204
205 for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
206 npcm7xx_clk_update_pll(&clk->plls[i]);
207 }
208 }
209
210 static void npcm7xx_clk_update_all_sels(NPCM7xxCLKState *clk)
211 {
212 int i;
213
214 for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
215 npcm7xx_clk_update_sel(&clk->sels[i]);
216 }
217 }
218
219 static void npcm7xx_clk_update_all_dividers(NPCM7xxCLKState *clk)
220 {
221 int i;
222
223 for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
224 npcm7xx_clk_update_divider(&clk->dividers[i]);
225 }
226 }
227
228 static void npcm7xx_clk_update_all_clocks(NPCM7xxCLKState *clk)
229 {
230 clock_update_hz(clk->clkref, NPCM7XX_CLOCK_REF_HZ);
231 npcm7xx_clk_update_all_plls(clk);
232 npcm7xx_clk_update_all_sels(clk);
233 npcm7xx_clk_update_all_dividers(clk);
234 }
235
236 /* Types of clock sources. */
237 typedef enum ClockSrcType {
238 CLKSRC_REF,
239 CLKSRC_PLL,
240 CLKSRC_SEL,
241 CLKSRC_DIV,
242 } ClockSrcType;
243
244 typedef struct PLLInitInfo {
245 const char *name;
246 ClockSrcType src_type;
247 int src_index;
248 int reg;
249 const char *public_name;
250 } PLLInitInfo;
251
252 typedef struct SELInitInfo {
253 const char *name;
254 uint8_t input_size;
255 ClockSrcType src_type[NPCM7XX_CLK_SEL_MAX_INPUT];
256 int src_index[NPCM7XX_CLK_SEL_MAX_INPUT];
257 int offset;
258 int len;
259 const char *public_name;
260 } SELInitInfo;
261
262 typedef struct DividerInitInfo {
263 const char *name;
264 ClockSrcType src_type;
265 int src_index;
266 uint32_t (*divide)(NPCM7xxClockDividerState *s);
267 int reg; /* not used when type == CONSTANT */
268 int offset; /* not used when type == CONSTANT */
269 int len; /* not used when type == CONSTANT */
270 int divisor; /* used only when type == CONSTANT */
271 const char *public_name;
272 } DividerInitInfo;
273
274 static const PLLInitInfo pll_init_info_list[] = {
275 [NPCM7XX_CLOCK_PLL0] = {
276 .name = "pll0",
277 .src_type = CLKSRC_REF,
278 .reg = NPCM7XX_CLK_PLLCON0,
279 },
280 [NPCM7XX_CLOCK_PLL1] = {
281 .name = "pll1",
282 .src_type = CLKSRC_REF,
283 .reg = NPCM7XX_CLK_PLLCON1,
284 },
285 [NPCM7XX_CLOCK_PLL2] = {
286 .name = "pll2",
287 .src_type = CLKSRC_REF,
288 .reg = NPCM7XX_CLK_PLLCON2,
289 },
290 [NPCM7XX_CLOCK_PLLG] = {
291 .name = "pllg",
292 .src_type = CLKSRC_REF,
293 .reg = NPCM7XX_CLK_PLLCONG,
294 },
295 };
296
297 static const SELInitInfo sel_init_info_list[] = {
298 [NPCM7XX_CLOCK_PIXCKSEL] = {
299 .name = "pixcksel",
300 .input_size = 2,
301 .src_type = {CLKSRC_PLL, CLKSRC_REF},
302 .src_index = {NPCM7XX_CLOCK_PLLG, 0},
303 .offset = 5,
304 .len = 1,
305 .public_name = "pixel-clock",
306 },
307 [NPCM7XX_CLOCK_MCCKSEL] = {
308 .name = "mccksel",
309 .input_size = 4,
310 .src_type = {CLKSRC_DIV, CLKSRC_REF, CLKSRC_REF,
311 /*MCBPCK, shouldn't be used in normal operation*/
312 CLKSRC_REF},
313 .src_index = {NPCM7XX_CLOCK_PLL1D2, 0, 0, 0},
314 .offset = 12,
315 .len = 2,
316 .public_name = "mc-phy-clock",
317 },
318 [NPCM7XX_CLOCK_CPUCKSEL] = {
319 .name = "cpucksel",
320 .input_size = 4,
321 .src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF,
322 /*SYSBPCK, shouldn't be used in normal operation*/
323 CLKSRC_REF},
324 .src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0, 0},
325 .offset = 0,
326 .len = 2,
327 .public_name = "system-clock",
328 },
329 [NPCM7XX_CLOCK_CLKOUTSEL] = {
330 .name = "clkoutsel",
331 .input_size = 5,
332 .src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF,
333 CLKSRC_PLL, CLKSRC_DIV},
334 .src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
335 NPCM7XX_CLOCK_PLLG, NPCM7XX_CLOCK_PLL2D2},
336 .offset = 18,
337 .len = 3,
338 .public_name = "tock",
339 },
340 [NPCM7XX_CLOCK_UARTCKSEL] = {
341 .name = "uartcksel",
342 .input_size = 4,
343 .src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
344 .src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
345 NPCM7XX_CLOCK_PLL2D2},
346 .offset = 8,
347 .len = 2,
348 },
349 [NPCM7XX_CLOCK_TIMCKSEL] = {
350 .name = "timcksel",
351 .input_size = 4,
352 .src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
353 .src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
354 NPCM7XX_CLOCK_PLL2D2},
355 .offset = 14,
356 .len = 2,
357 },
358 [NPCM7XX_CLOCK_SDCKSEL] = {
359 .name = "sdcksel",
360 .input_size = 4,
361 .src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
362 .src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
363 NPCM7XX_CLOCK_PLL2D2},
364 .offset = 6,
365 .len = 2,
366 },
367 [NPCM7XX_CLOCK_GFXMSEL] = {
368 .name = "gfxmksel",
369 .input_size = 2,
370 .src_type = {CLKSRC_REF, CLKSRC_PLL},
371 .src_index = {0, NPCM7XX_CLOCK_PLL2},
372 .offset = 21,
373 .len = 1,
374 },
375 [NPCM7XX_CLOCK_SUCKSEL] = {
376 .name = "sucksel",
377 .input_size = 4,
378 .src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
379 .src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
380 NPCM7XX_CLOCK_PLL2D2},
381 .offset = 10,
382 .len = 2,
383 },
384 };
385
386 static const DividerInitInfo divider_init_info_list[] = {
387 [NPCM7XX_CLOCK_PLL1D2] = {
388 .name = "pll1d2",
389 .src_type = CLKSRC_PLL,
390 .src_index = NPCM7XX_CLOCK_PLL1,
391 .divide = divide_by_constant,
392 .divisor = 2,
393 },
394 [NPCM7XX_CLOCK_PLL2D2] = {
395 .name = "pll2d2",
396 .src_type = CLKSRC_PLL,
397 .src_index = NPCM7XX_CLOCK_PLL2,
398 .divide = divide_by_constant,
399 .divisor = 2,
400 },
401 [NPCM7XX_CLOCK_MC_DIVIDER] = {
402 .name = "mc-divider",
403 .src_type = CLKSRC_SEL,
404 .src_index = NPCM7XX_CLOCK_MCCKSEL,
405 .divide = divide_by_constant,
406 .divisor = 2,
407 .public_name = "mc-clock"
408 },
409 [NPCM7XX_CLOCK_AXI_DIVIDER] = {
410 .name = "axi-divider",
411 .src_type = CLKSRC_SEL,
412 .src_index = NPCM7XX_CLOCK_CPUCKSEL,
413 .divide = shift_by_reg_divisor,
414 .reg = NPCM7XX_CLK_CLKDIV1,
415 .offset = 0,
416 .len = 1,
417 .public_name = "clk2"
418 },
419 [NPCM7XX_CLOCK_AHB_DIVIDER] = {
420 .name = "ahb-divider",
421 .src_type = CLKSRC_DIV,
422 .src_index = NPCM7XX_CLOCK_AXI_DIVIDER,
423 .divide = divide_by_reg_divisor,
424 .reg = NPCM7XX_CLK_CLKDIV1,
425 .offset = 26,
426 .len = 2,
427 .public_name = "clk4"
428 },
429 [NPCM7XX_CLOCK_AHB3_DIVIDER] = {
430 .name = "ahb3-divider",
431 .src_type = CLKSRC_DIV,
432 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
433 .divide = divide_by_reg_divisor,
434 .reg = NPCM7XX_CLK_CLKDIV1,
435 .offset = 6,
436 .len = 5,
437 .public_name = "ahb3-spi3-clock"
438 },
439 [NPCM7XX_CLOCK_SPI0_DIVIDER] = {
440 .name = "spi0-divider",
441 .src_type = CLKSRC_DIV,
442 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
443 .divide = divide_by_reg_divisor,
444 .reg = NPCM7XX_CLK_CLKDIV3,
445 .offset = 6,
446 .len = 5,
447 .public_name = "spi0-clock",
448 },
449 [NPCM7XX_CLOCK_SPIX_DIVIDER] = {
450 .name = "spix-divider",
451 .src_type = CLKSRC_DIV,
452 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
453 .divide = divide_by_reg_divisor,
454 .reg = NPCM7XX_CLK_CLKDIV3,
455 .offset = 1,
456 .len = 5,
457 .public_name = "spix-clock",
458 },
459 [NPCM7XX_CLOCK_APB1_DIVIDER] = {
460 .name = "apb1-divider",
461 .src_type = CLKSRC_DIV,
462 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
463 .divide = shift_by_reg_divisor,
464 .reg = NPCM7XX_CLK_CLKDIV2,
465 .offset = 24,
466 .len = 2,
467 .public_name = "apb1-clock",
468 },
469 [NPCM7XX_CLOCK_APB2_DIVIDER] = {
470 .name = "apb2-divider",
471 .src_type = CLKSRC_DIV,
472 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
473 .divide = shift_by_reg_divisor,
474 .reg = NPCM7XX_CLK_CLKDIV2,
475 .offset = 26,
476 .len = 2,
477 .public_name = "apb2-clock",
478 },
479 [NPCM7XX_CLOCK_APB3_DIVIDER] = {
480 .name = "apb3-divider",
481 .src_type = CLKSRC_DIV,
482 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
483 .divide = shift_by_reg_divisor,
484 .reg = NPCM7XX_CLK_CLKDIV2,
485 .offset = 28,
486 .len = 2,
487 .public_name = "apb3-clock",
488 },
489 [NPCM7XX_CLOCK_APB4_DIVIDER] = {
490 .name = "apb4-divider",
491 .src_type = CLKSRC_DIV,
492 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
493 .divide = shift_by_reg_divisor,
494 .reg = NPCM7XX_CLK_CLKDIV2,
495 .offset = 30,
496 .len = 2,
497 .public_name = "apb4-clock",
498 },
499 [NPCM7XX_CLOCK_APB5_DIVIDER] = {
500 .name = "apb5-divider",
501 .src_type = CLKSRC_DIV,
502 .src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
503 .divide = shift_by_reg_divisor,
504 .reg = NPCM7XX_CLK_CLKDIV2,
505 .offset = 22,
506 .len = 2,
507 .public_name = "apb5-clock",
508 },
509 [NPCM7XX_CLOCK_CLKOUT_DIVIDER] = {
510 .name = "clkout-divider",
511 .src_type = CLKSRC_SEL,
512 .src_index = NPCM7XX_CLOCK_CLKOUTSEL,
513 .divide = divide_by_reg_divisor,
514 .reg = NPCM7XX_CLK_CLKDIV2,
515 .offset = 16,
516 .len = 5,
517 .public_name = "clkout",
518 },
519 [NPCM7XX_CLOCK_UART_DIVIDER] = {
520 .name = "uart-divider",
521 .src_type = CLKSRC_SEL,
522 .src_index = NPCM7XX_CLOCK_UARTCKSEL,
523 .divide = divide_by_reg_divisor,
524 .reg = NPCM7XX_CLK_CLKDIV1,
525 .offset = 16,
526 .len = 5,
527 .public_name = "uart-clock",
528 },
529 [NPCM7XX_CLOCK_TIMER_DIVIDER] = {
530 .name = "timer-divider",
531 .src_type = CLKSRC_SEL,
532 .src_index = NPCM7XX_CLOCK_TIMCKSEL,
533 .divide = divide_by_reg_divisor,
534 .reg = NPCM7XX_CLK_CLKDIV1,
535 .offset = 21,
536 .len = 5,
537 .public_name = "timer-clock",
538 },
539 [NPCM7XX_CLOCK_ADC_DIVIDER] = {
540 .name = "adc-divider",
541 .src_type = CLKSRC_DIV,
542 .src_index = NPCM7XX_CLOCK_TIMER_DIVIDER,
543 .divide = shift_by_reg_divisor,
544 .reg = NPCM7XX_CLK_CLKDIV1,
545 .offset = 28,
546 .len = 3,
547 .public_name = "adc-clock",
548 },
549 [NPCM7XX_CLOCK_MMC_DIVIDER] = {
550 .name = "mmc-divider",
551 .src_type = CLKSRC_SEL,
552 .src_index = NPCM7XX_CLOCK_SDCKSEL,
553 .divide = divide_by_reg_divisor,
554 .reg = NPCM7XX_CLK_CLKDIV1,
555 .offset = 11,
556 .len = 5,
557 .public_name = "mmc-clock",
558 },
559 [NPCM7XX_CLOCK_SDHC_DIVIDER] = {
560 .name = "sdhc-divider",
561 .src_type = CLKSRC_SEL,
562 .src_index = NPCM7XX_CLOCK_SDCKSEL,
563 .divide = divide_by_reg_divisor_times_2,
564 .reg = NPCM7XX_CLK_CLKDIV2,
565 .offset = 0,
566 .len = 4,
567 .public_name = "sdhc-clock",
568 },
569 [NPCM7XX_CLOCK_GFXM_DIVIDER] = {
570 .name = "gfxm-divider",
571 .src_type = CLKSRC_SEL,
572 .src_index = NPCM7XX_CLOCK_GFXMSEL,
573 .divide = divide_by_constant,
574 .divisor = 3,
575 .public_name = "gfxm-clock",
576 },
577 [NPCM7XX_CLOCK_UTMI_DIVIDER] = {
578 .name = "utmi-divider",
579 .src_type = CLKSRC_SEL,
580 .src_index = NPCM7XX_CLOCK_SUCKSEL,
581 .divide = divide_by_reg_divisor,
582 .reg = NPCM7XX_CLK_CLKDIV2,
583 .offset = 8,
584 .len = 5,
585 .public_name = "utmi-clock",
586 },
587 };
588
589 static void npcm7xx_clk_update_pll_cb(void *opaque, ClockEvent event)
590 {
591 npcm7xx_clk_update_pll(opaque);
592 }
593
594 static void npcm7xx_clk_pll_init(Object *obj)
595 {
596 NPCM7xxClockPLLState *pll = NPCM7XX_CLOCK_PLL(obj);
597
598 pll->clock_in = qdev_init_clock_in(DEVICE(pll), "clock-in",
599 npcm7xx_clk_update_pll_cb, pll,
600 ClockUpdate);
601 pll->clock_out = qdev_init_clock_out(DEVICE(pll), "clock-out");
602 }
603
604 static void npcm7xx_clk_update_sel_cb(void *opaque, ClockEvent event)
605 {
606 npcm7xx_clk_update_sel(opaque);
607 }
608
609 static void npcm7xx_clk_sel_init(Object *obj)
610 {
611 int i;
612 NPCM7xxClockSELState *sel = NPCM7XX_CLOCK_SEL(obj);
613
614 for (i = 0; i < NPCM7XX_CLK_SEL_MAX_INPUT; ++i) {
615 g_autofree char *s = g_strdup_printf("clock-in[%d]", i);
616 sel->clock_in[i] = qdev_init_clock_in(DEVICE(sel), s,
617 npcm7xx_clk_update_sel_cb, sel, ClockUpdate);
618 }
619 sel->clock_out = qdev_init_clock_out(DEVICE(sel), "clock-out");
620 }
621
622 static void npcm7xx_clk_update_divider_cb(void *opaque, ClockEvent event)
623 {
624 npcm7xx_clk_update_divider(opaque);
625 }
626
627 static void npcm7xx_clk_divider_init(Object *obj)
628 {
629 NPCM7xxClockDividerState *div = NPCM7XX_CLOCK_DIVIDER(obj);
630
631 div->clock_in = qdev_init_clock_in(DEVICE(div), "clock-in",
632 npcm7xx_clk_update_divider_cb,
633 div, ClockUpdate);
634 div->clock_out = qdev_init_clock_out(DEVICE(div), "clock-out");
635 }
636
637 static void npcm7xx_init_clock_pll(NPCM7xxClockPLLState *pll,
638 NPCM7xxCLKState *clk, const PLLInitInfo *init_info)
639 {
640 pll->name = init_info->name;
641 pll->clk = clk;
642 pll->reg = init_info->reg;
643 if (init_info->public_name != NULL) {
644 qdev_alias_clock(DEVICE(pll), "clock-out", DEVICE(clk),
645 init_info->public_name);
646 }
647 }
648
649 static void npcm7xx_init_clock_sel(NPCM7xxClockSELState *sel,
650 NPCM7xxCLKState *clk, const SELInitInfo *init_info)
651 {
652 int input_size = init_info->input_size;
653
654 sel->name = init_info->name;
655 sel->clk = clk;
656 sel->input_size = init_info->input_size;
657 g_assert(input_size <= NPCM7XX_CLK_SEL_MAX_INPUT);
658 sel->offset = init_info->offset;
659 sel->len = init_info->len;
660 if (init_info->public_name != NULL) {
661 qdev_alias_clock(DEVICE(sel), "clock-out", DEVICE(clk),
662 init_info->public_name);
663 }
664 }
665
666 static void npcm7xx_init_clock_divider(NPCM7xxClockDividerState *div,
667 NPCM7xxCLKState *clk, const DividerInitInfo *init_info)
668 {
669 div->name = init_info->name;
670 div->clk = clk;
671
672 div->divide = init_info->divide;
673 if (div->divide == divide_by_constant) {
674 div->divisor = init_info->divisor;
675 } else {
676 div->reg = init_info->reg;
677 div->offset = init_info->offset;
678 div->len = init_info->len;
679 }
680 if (init_info->public_name != NULL) {
681 qdev_alias_clock(DEVICE(div), "clock-out", DEVICE(clk),
682 init_info->public_name);
683 }
684 }
685
686 static Clock *npcm7xx_get_clock(NPCM7xxCLKState *clk, ClockSrcType type,
687 int index)
688 {
689 switch (type) {
690 case CLKSRC_REF:
691 return clk->clkref;
692 case CLKSRC_PLL:
693 return clk->plls[index].clock_out;
694 case CLKSRC_SEL:
695 return clk->sels[index].clock_out;
696 case CLKSRC_DIV:
697 return clk->dividers[index].clock_out;
698 default:
699 g_assert_not_reached();
700 }
701 }
702
703 static void npcm7xx_connect_clocks(NPCM7xxCLKState *clk)
704 {
705 int i, j;
706 Clock *src;
707
708 for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
709 src = npcm7xx_get_clock(clk, pll_init_info_list[i].src_type,
710 pll_init_info_list[i].src_index);
711 clock_set_source(clk->plls[i].clock_in, src);
712 }
713 for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
714 for (j = 0; j < sel_init_info_list[i].input_size; ++j) {
715 src = npcm7xx_get_clock(clk, sel_init_info_list[i].src_type[j],
716 sel_init_info_list[i].src_index[j]);
717 clock_set_source(clk->sels[i].clock_in[j], src);
718 }
719 }
720 for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
721 src = npcm7xx_get_clock(clk, divider_init_info_list[i].src_type,
722 divider_init_info_list[i].src_index);
723 clock_set_source(clk->dividers[i].clock_in, src);
724 }
725 }
726
727 static uint64_t npcm7xx_clk_read(void *opaque, hwaddr offset, unsigned size)
728 {
729 uint32_t reg = offset / sizeof(uint32_t);
730 NPCM7xxCLKState *s = opaque;
731 int64_t now_ns;
732 uint32_t value = 0;
733
734 if (reg >= NPCM7XX_CLK_NR_REGS) {
735 qemu_log_mask(LOG_GUEST_ERROR,
736 "%s: offset 0x%04" HWADDR_PRIx " out of range\n",
737 __func__, offset);
738 return 0;
739 }
740
741 switch (reg) {
742 case NPCM7XX_CLK_SWRSTR:
743 qemu_log_mask(LOG_GUEST_ERROR,
744 "%s: register @ 0x%04" HWADDR_PRIx " is write-only\n",
745 __func__, offset);
746 break;
747
748 case NPCM7XX_CLK_SECCNT:
749 now_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
750 value = (now_ns - s->ref_ns) / NANOSECONDS_PER_SECOND;
751 break;
752
753 case NPCM7XX_CLK_CNTR25M:
754 now_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
755 /*
756 * This register counts 25 MHz cycles, updating every 640 ns. It rolls
757 * over to zero every second.
758 *
759 * The 4 LSBs are always zero: (1e9 / 640) << 4 = 25000000.
760 */
761 value = (((now_ns - s->ref_ns) / 640) << 4) % NPCM7XX_CLOCK_REF_HZ;
762 break;
763
764 default:
765 value = s->regs[reg];
766 break;
767 };
768
769 trace_npcm7xx_clk_read(offset, value);
770
771 return value;
772 }
773
774 static void npcm7xx_clk_write(void *opaque, hwaddr offset,
775 uint64_t v, unsigned size)
776 {
777 uint32_t reg = offset / sizeof(uint32_t);
778 NPCM7xxCLKState *s = opaque;
779 uint32_t value = v;
780
781 trace_npcm7xx_clk_write(offset, value);
782
783 if (reg >= NPCM7XX_CLK_NR_REGS) {
784 qemu_log_mask(LOG_GUEST_ERROR,
785 "%s: offset 0x%04" HWADDR_PRIx " out of range\n",
786 __func__, offset);
787 return;
788 }
789
790 switch (reg) {
791 case NPCM7XX_CLK_SWRSTR:
792 qemu_log_mask(LOG_UNIMP, "%s: SW reset not implemented: 0x%02x\n",
793 __func__, value);
794 value = 0;
795 break;
796
797 case NPCM7XX_CLK_PLLCON0:
798 case NPCM7XX_CLK_PLLCON1:
799 case NPCM7XX_CLK_PLLCON2:
800 case NPCM7XX_CLK_PLLCONG:
801 if (value & PLLCON_PWDEN) {
802 /* Power down -- clear lock and indicate loss of lock */
803 value &= ~PLLCON_LOKI;
804 value |= PLLCON_LOKS;
805 } else {
806 /* Normal mode -- assume always locked */
807 value |= PLLCON_LOKI;
808 /* Keep LOKS unchanged unless cleared by writing 1 */
809 if (value & PLLCON_LOKS) {
810 value &= ~PLLCON_LOKS;
811 } else {
812 value |= (value & PLLCON_LOKS);
813 }
814 }
815 /* Only update PLL when it is locked. */
816 if (value & PLLCON_LOKI) {
817 npcm7xx_clk_update_pll(&s->plls[find_pll_by_reg(reg)]);
818 }
819 break;
820
821 case NPCM7XX_CLK_CLKSEL:
822 npcm7xx_clk_update_all_sels(s);
823 break;
824
825 case NPCM7XX_CLK_CLKDIV1:
826 case NPCM7XX_CLK_CLKDIV2:
827 case NPCM7XX_CLK_CLKDIV3:
828 npcm7xx_clk_update_all_dividers(s);
829 break;
830
831 case NPCM7XX_CLK_CNTR25M:
832 qemu_log_mask(LOG_GUEST_ERROR,
833 "%s: register @ 0x%04" HWADDR_PRIx " is read-only\n",
834 __func__, offset);
835 return;
836 }
837
838 s->regs[reg] = value;
839 }
840
841 /* Perform reset action triggered by a watchdog */
842 static void npcm7xx_clk_perform_watchdog_reset(void *opaque, int n,
843 int level)
844 {
845 NPCM7xxCLKState *clk = NPCM7XX_CLK(opaque);
846 uint32_t rcr;
847
848 g_assert(n >= 0 && n <= NPCM7XX_NR_WATCHDOGS);
849 rcr = clk->regs[NPCM7XX_CLK_WD0RCR + n];
850 if (rcr & NPCM7XX_CLK_WDRCR_CA9C) {
851 watchdog_perform_action();
852 } else {
853 qemu_log_mask(LOG_UNIMP,
854 "%s: only CPU reset is implemented. (requested 0x%" PRIx32")\n",
855 __func__, rcr);
856 }
857 }
858
859 static const struct MemoryRegionOps npcm7xx_clk_ops = {
860 .read = npcm7xx_clk_read,
861 .write = npcm7xx_clk_write,
862 .endianness = DEVICE_LITTLE_ENDIAN,
863 .valid = {
864 .min_access_size = 4,
865 .max_access_size = 4,
866 .unaligned = false,
867 },
868 };
869
870 static void npcm7xx_clk_enter_reset(Object *obj, ResetType type)
871 {
872 NPCM7xxCLKState *s = NPCM7XX_CLK(obj);
873
874 QEMU_BUILD_BUG_ON(sizeof(s->regs) != sizeof(cold_reset_values));
875
876 switch (type) {
877 case RESET_TYPE_COLD:
878 memcpy(s->regs, cold_reset_values, sizeof(cold_reset_values));
879 s->ref_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
880 npcm7xx_clk_update_all_clocks(s);
881 return;
882 }
883
884 /*
885 * A small number of registers need to be reset on a core domain reset,
886 * but no such reset type exists yet.
887 */
888 qemu_log_mask(LOG_UNIMP, "%s: reset type %d not implemented.",
889 __func__, type);
890 }
891
892 static void npcm7xx_clk_init_clock_hierarchy(NPCM7xxCLKState *s)
893 {
894 int i;
895
896 s->clkref = qdev_init_clock_in(DEVICE(s), "clkref", NULL, NULL, 0);
897
898 /* First pass: init all converter modules */
899 QEMU_BUILD_BUG_ON(ARRAY_SIZE(pll_init_info_list) != NPCM7XX_CLOCK_NR_PLLS);
900 QEMU_BUILD_BUG_ON(ARRAY_SIZE(sel_init_info_list) != NPCM7XX_CLOCK_NR_SELS);
901 QEMU_BUILD_BUG_ON(ARRAY_SIZE(divider_init_info_list)
902 != NPCM7XX_CLOCK_NR_DIVIDERS);
903 for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
904 object_initialize_child(OBJECT(s), pll_init_info_list[i].name,
905 &s->plls[i], TYPE_NPCM7XX_CLOCK_PLL);
906 npcm7xx_init_clock_pll(&s->plls[i], s,
907 &pll_init_info_list[i]);
908 }
909 for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
910 object_initialize_child(OBJECT(s), sel_init_info_list[i].name,
911 &s->sels[i], TYPE_NPCM7XX_CLOCK_SEL);
912 npcm7xx_init_clock_sel(&s->sels[i], s,
913 &sel_init_info_list[i]);
914 }
915 for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
916 object_initialize_child(OBJECT(s), divider_init_info_list[i].name,
917 &s->dividers[i], TYPE_NPCM7XX_CLOCK_DIVIDER);
918 npcm7xx_init_clock_divider(&s->dividers[i], s,
919 &divider_init_info_list[i]);
920 }
921
922 /* Second pass: connect converter modules */
923 npcm7xx_connect_clocks(s);
924
925 clock_update_hz(s->clkref, NPCM7XX_CLOCK_REF_HZ);
926 }
927
928 static void npcm7xx_clk_init(Object *obj)
929 {
930 NPCM7xxCLKState *s = NPCM7XX_CLK(obj);
931
932 memory_region_init_io(&s->iomem, obj, &npcm7xx_clk_ops, s,
933 TYPE_NPCM7XX_CLK, 4 * KiB);
934 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
935 }
936
937 static int npcm7xx_clk_post_load(void *opaque, int version_id)
938 {
939 if (version_id >= 1) {
940 NPCM7xxCLKState *clk = opaque;
941
942 npcm7xx_clk_update_all_clocks(clk);
943 }
944
945 return 0;
946 }
947
948 static void npcm7xx_clk_realize(DeviceState *dev, Error **errp)
949 {
950 int i;
951 NPCM7xxCLKState *s = NPCM7XX_CLK(dev);
952
953 qdev_init_gpio_in_named(DEVICE(s), npcm7xx_clk_perform_watchdog_reset,
954 NPCM7XX_WATCHDOG_RESET_GPIO_IN, NPCM7XX_NR_WATCHDOGS);
955 npcm7xx_clk_init_clock_hierarchy(s);
956
957 /* Realize child devices */
958 for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
959 if (!qdev_realize(DEVICE(&s->plls[i]), NULL, errp)) {
960 return;
961 }
962 }
963 for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
964 if (!qdev_realize(DEVICE(&s->sels[i]), NULL, errp)) {
965 return;
966 }
967 }
968 for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
969 if (!qdev_realize(DEVICE(&s->dividers[i]), NULL, errp)) {
970 return;
971 }
972 }
973 }
974
975 static const VMStateDescription vmstate_npcm7xx_clk_pll = {
976 .name = "npcm7xx-clock-pll",
977 .version_id = 0,
978 .minimum_version_id = 0,
979 .fields = (VMStateField[]) {
980 VMSTATE_CLOCK(clock_in, NPCM7xxClockPLLState),
981 VMSTATE_END_OF_LIST(),
982 },
983 };
984
985 static const VMStateDescription vmstate_npcm7xx_clk_sel = {
986 .name = "npcm7xx-clock-sel",
987 .version_id = 0,
988 .minimum_version_id = 0,
989 .fields = (VMStateField[]) {
990 VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(clock_in, NPCM7xxClockSELState,
991 NPCM7XX_CLK_SEL_MAX_INPUT, 0, vmstate_clock, Clock),
992 VMSTATE_END_OF_LIST(),
993 },
994 };
995
996 static const VMStateDescription vmstate_npcm7xx_clk_divider = {
997 .name = "npcm7xx-clock-divider",
998 .version_id = 0,
999 .minimum_version_id = 0,
1000 .fields = (VMStateField[]) {
1001 VMSTATE_CLOCK(clock_in, NPCM7xxClockDividerState),
1002 VMSTATE_END_OF_LIST(),
1003 },
1004 };
1005
1006 static const VMStateDescription vmstate_npcm7xx_clk = {
1007 .name = "npcm7xx-clk",
1008 .version_id = 1,
1009 .minimum_version_id = 1,
1010 .post_load = npcm7xx_clk_post_load,
1011 .fields = (VMStateField[]) {
1012 VMSTATE_UINT32_ARRAY(regs, NPCM7xxCLKState, NPCM7XX_CLK_NR_REGS),
1013 VMSTATE_INT64(ref_ns, NPCM7xxCLKState),
1014 VMSTATE_CLOCK(clkref, NPCM7xxCLKState),
1015 VMSTATE_END_OF_LIST(),
1016 },
1017 };
1018
1019 static void npcm7xx_clk_pll_class_init(ObjectClass *klass, void *data)
1020 {
1021 DeviceClass *dc = DEVICE_CLASS(klass);
1022
1023 dc->desc = "NPCM7xx Clock PLL Module";
1024 dc->vmsd = &vmstate_npcm7xx_clk_pll;
1025 }
1026
1027 static void npcm7xx_clk_sel_class_init(ObjectClass *klass, void *data)
1028 {
1029 DeviceClass *dc = DEVICE_CLASS(klass);
1030
1031 dc->desc = "NPCM7xx Clock SEL Module";
1032 dc->vmsd = &vmstate_npcm7xx_clk_sel;
1033 }
1034
1035 static void npcm7xx_clk_divider_class_init(ObjectClass *klass, void *data)
1036 {
1037 DeviceClass *dc = DEVICE_CLASS(klass);
1038
1039 dc->desc = "NPCM7xx Clock Divider Module";
1040 dc->vmsd = &vmstate_npcm7xx_clk_divider;
1041 }
1042
1043 static void npcm7xx_clk_class_init(ObjectClass *klass, void *data)
1044 {
1045 ResettableClass *rc = RESETTABLE_CLASS(klass);
1046 DeviceClass *dc = DEVICE_CLASS(klass);
1047
1048 QEMU_BUILD_BUG_ON(NPCM7XX_CLK_REGS_END > NPCM7XX_CLK_NR_REGS);
1049
1050 dc->desc = "NPCM7xx Clock Control Registers";
1051 dc->vmsd = &vmstate_npcm7xx_clk;
1052 dc->realize = npcm7xx_clk_realize;
1053 rc->phases.enter = npcm7xx_clk_enter_reset;
1054 }
1055
1056 static const TypeInfo npcm7xx_clk_pll_info = {
1057 .name = TYPE_NPCM7XX_CLOCK_PLL,
1058 .parent = TYPE_DEVICE,
1059 .instance_size = sizeof(NPCM7xxClockPLLState),
1060 .instance_init = npcm7xx_clk_pll_init,
1061 .class_init = npcm7xx_clk_pll_class_init,
1062 };
1063
1064 static const TypeInfo npcm7xx_clk_sel_info = {
1065 .name = TYPE_NPCM7XX_CLOCK_SEL,
1066 .parent = TYPE_DEVICE,
1067 .instance_size = sizeof(NPCM7xxClockSELState),
1068 .instance_init = npcm7xx_clk_sel_init,
1069 .class_init = npcm7xx_clk_sel_class_init,
1070 };
1071
1072 static const TypeInfo npcm7xx_clk_divider_info = {
1073 .name = TYPE_NPCM7XX_CLOCK_DIVIDER,
1074 .parent = TYPE_DEVICE,
1075 .instance_size = sizeof(NPCM7xxClockDividerState),
1076 .instance_init = npcm7xx_clk_divider_init,
1077 .class_init = npcm7xx_clk_divider_class_init,
1078 };
1079
1080 static const TypeInfo npcm7xx_clk_info = {
1081 .name = TYPE_NPCM7XX_CLK,
1082 .parent = TYPE_SYS_BUS_DEVICE,
1083 .instance_size = sizeof(NPCM7xxCLKState),
1084 .instance_init = npcm7xx_clk_init,
1085 .class_init = npcm7xx_clk_class_init,
1086 };
1087
1088 static void npcm7xx_clk_register_type(void)
1089 {
1090 type_register_static(&npcm7xx_clk_pll_info);
1091 type_register_static(&npcm7xx_clk_sel_info);
1092 type_register_static(&npcm7xx_clk_divider_info);
1093 type_register_static(&npcm7xx_clk_info);
1094 }
1095 type_init(npcm7xx_clk_register_type);
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