1 // SPDX-License-Identifier: GPL-2.0
3 * (C) Copyright 2015 Google, Inc
4 * (C) Copyright 2016 Heiko Stuebner <heiko@sntech.de>
8 #include <clk-uclass.h>
10 #include <dt-structs.h>
15 #include <asm/arch-rockchip/clock.h>
16 #include <asm/arch-rockchip/cru_rk3188.h>
17 #include <asm/arch-rockchip/grf_rk3188.h>
18 #include <asm/arch-rockchip/hardware.h>
19 #include <dt-bindings/clock/rk3188-cru.h>
20 #include <dm/device-internal.h>
22 #include <dm/uclass-internal.h>
23 #include <linux/log2.h>
25 enum rk3188_clk_type {
30 struct rk3188_clk_plat {
31 #if CONFIG_IS_ENABLED(OF_PLATDATA)
32 struct dtd_rockchip_rk3188_cru dtd;
43 VCO_MAX_HZ = 2200U * 1000000,
44 VCO_MIN_HZ = 440 * 1000000,
45 OUTPUT_MAX_HZ = 2200U * 1000000,
46 OUTPUT_MIN_HZ = 30 * 1000000,
47 FREF_MAX_HZ = 2200U * 1000000,
48 FREF_MIN_HZ = 30 * 1000,
59 PLL_BWADJ_MASK = 0x0fff,
65 SOCSTS_DPLL_LOCK = 1 << 5,
66 SOCSTS_APLL_LOCK = 1 << 6,
67 SOCSTS_CPLL_LOCK = 1 << 7,
68 SOCSTS_GPLL_LOCK = 1 << 8,
71 #define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1))
73 #define PLL_DIVISORS(hz, _nr, _no) {\
74 .nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\
75 _Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\
76 (_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\
77 "divisors on line " __stringify(__LINE__));
79 /* Keep divisors as low as possible to reduce jitter and power usage */
80 #ifdef CONFIG_SPL_BUILD
81 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
82 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
85 static int rkclk_set_pll(struct rk3188_cru *cru, enum rk_clk_id clk_id,
86 const struct pll_div *div, bool has_bwadj)
88 int pll_id = rk_pll_id(clk_id);
89 struct rk3188_pll *pll = &cru->pll[pll_id];
90 /* All PLLs have same VCO and output frequency range restrictions. */
91 uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000;
92 uint output_hz = vco_hz / div->no;
94 debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n",
95 (uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz);
96 assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
97 output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ &&
98 (div->no == 1 || !(div->no % 2)));
101 rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT);
103 rk_clrsetreg(&pll->con0,
104 CLKR_MASK << CLKR_SHIFT | PLL_OD_MASK,
105 ((div->nr - 1) << CLKR_SHIFT) | (div->no - 1));
106 rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1);
109 rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1);
113 /* return from reset */
114 rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT);
119 static int rkclk_configure_ddr(struct rk3188_cru *cru, struct rk3188_grf *grf,
120 unsigned int hz, bool has_bwadj)
122 static const struct pll_div dpll_cfg[] = {
123 {.nf = 75, .nr = 1, .no = 6},
124 {.nf = 400, .nr = 9, .no = 2},
125 {.nf = 500, .nr = 9, .no = 2},
126 {.nf = 100, .nr = 3, .no = 1},
134 case 533000000: /* actually 533.3P MHz */
137 case 666000000: /* actually 666.6P MHz */
144 debug("Unsupported SDRAM frequency");
148 /* pll enter slow-mode */
149 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
150 DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
152 rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg], has_bwadj);
154 /* wait for pll lock */
155 while (!(readl(&grf->soc_status0) & SOCSTS_DPLL_LOCK))
158 /* PLL enter normal-mode */
159 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
160 DPLL_MODE_NORMAL << DPLL_MODE_SHIFT);
165 static int rkclk_configure_cpu(struct rk3188_cru *cru, struct rk3188_grf *grf,
166 unsigned int hz, bool has_bwadj)
168 static const struct pll_div apll_cfg[] = {
169 {.nf = 50, .nr = 1, .no = 2},
170 {.nf = 67, .nr = 1, .no = 1},
172 int div_core_peri, div_aclk_core, cfg;
175 * We support two possible frequencies, the safe 600MHz
176 * which will work with default pmic settings and will
177 * be set in SPL to get away from the 24MHz default and
178 * the maximum of 1.6Ghz, which boards can set if they
179 * were able to get pmic support for it.
193 debug("Unsupported ARMCLK frequency");
197 /* pll enter slow-mode */
198 rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK << APLL_MODE_SHIFT,
199 APLL_MODE_SLOW << APLL_MODE_SHIFT);
201 rkclk_set_pll(cru, CLK_ARM, &apll_cfg[cfg], has_bwadj);
203 /* waiting for pll lock */
204 while (!(readl(&grf->soc_status0) & SOCSTS_APLL_LOCK))
207 /* Set divider for peripherals attached to the cpu core. */
208 rk_clrsetreg(&cru->cru_clksel_con[0],
209 CORE_PERI_DIV_MASK << CORE_PERI_DIV_SHIFT,
210 div_core_peri << CORE_PERI_DIV_SHIFT);
212 /* set up dependent divisor for aclk_core */
213 rk_clrsetreg(&cru->cru_clksel_con[1],
214 CORE_ACLK_DIV_MASK << CORE_ACLK_DIV_SHIFT,
215 div_aclk_core << CORE_ACLK_DIV_SHIFT);
217 /* PLL enter normal-mode */
218 rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK << APLL_MODE_SHIFT,
219 APLL_MODE_NORMAL << APLL_MODE_SHIFT);
224 /* Get pll rate by id */
225 static uint32_t rkclk_pll_get_rate(struct rk3188_cru *cru,
226 enum rk_clk_id clk_id)
230 int pll_id = rk_pll_id(clk_id);
231 struct rk3188_pll *pll = &cru->pll[pll_id];
232 static u8 clk_shift[CLK_COUNT] = {
233 0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT,
238 con = readl(&cru->cru_mode_con);
239 shift = clk_shift[clk_id];
240 switch ((con >> shift) & APLL_MODE_MASK) {
243 case APLL_MODE_NORMAL:
245 con = readl(&pll->con0);
246 no = ((con >> CLKOD_SHIFT) & CLKOD_MASK) + 1;
247 nr = ((con >> CLKR_SHIFT) & CLKR_MASK) + 1;
248 con = readl(&pll->con1);
249 nf = ((con >> CLKF_SHIFT) & CLKF_MASK) + 1;
251 return (24 * nf / (nr * no)) * 1000000;
258 static ulong rockchip_mmc_get_clk(struct rk3188_cru *cru, uint gclk_rate,
267 con = readl(&cru->cru_clksel_con[12]);
268 div = (con >> EMMC_DIV_SHIFT) & EMMC_DIV_MASK;
272 con = readl(&cru->cru_clksel_con[11]);
273 div = (con >> MMC0_DIV_SHIFT) & MMC0_DIV_MASK;
277 con = readl(&cru->cru_clksel_con[12]);
278 div = (con >> SDIO_DIV_SHIFT) & SDIO_DIV_MASK;
284 return DIV_TO_RATE(gclk_rate, div) / 2;
287 static ulong rockchip_mmc_set_clk(struct rk3188_cru *cru, uint gclk_rate,
288 int periph, uint freq)
292 debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
293 /* mmc clock defaulg div 2 internal, need provide double in cru */
294 src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq) - 1;
295 assert(src_clk_div <= 0x3f);
300 rk_clrsetreg(&cru->cru_clksel_con[12],
301 EMMC_DIV_MASK << EMMC_DIV_SHIFT,
302 src_clk_div << EMMC_DIV_SHIFT);
306 rk_clrsetreg(&cru->cru_clksel_con[11],
307 MMC0_DIV_MASK << MMC0_DIV_SHIFT,
308 src_clk_div << MMC0_DIV_SHIFT);
312 rk_clrsetreg(&cru->cru_clksel_con[12],
313 SDIO_DIV_MASK << SDIO_DIV_SHIFT,
314 src_clk_div << SDIO_DIV_SHIFT);
320 return rockchip_mmc_get_clk(cru, gclk_rate, periph);
323 static ulong rockchip_spi_get_clk(struct rk3188_cru *cru, uint gclk_rate,
331 con = readl(&cru->cru_clksel_con[25]);
332 div = (con >> SPI0_DIV_SHIFT) & SPI0_DIV_MASK;
335 con = readl(&cru->cru_clksel_con[25]);
336 div = (con >> SPI1_DIV_SHIFT) & SPI1_DIV_MASK;
342 return DIV_TO_RATE(gclk_rate, div);
345 static ulong rockchip_spi_set_clk(struct rk3188_cru *cru, uint gclk_rate,
346 int periph, uint freq)
348 int src_clk_div = DIV_ROUND_UP(gclk_rate, freq) - 1;
350 assert(src_clk_div < 128);
353 assert(src_clk_div <= SPI0_DIV_MASK);
354 rk_clrsetreg(&cru->cru_clksel_con[25],
355 SPI0_DIV_MASK << SPI0_DIV_SHIFT,
356 src_clk_div << SPI0_DIV_SHIFT);
359 assert(src_clk_div <= SPI1_DIV_MASK);
360 rk_clrsetreg(&cru->cru_clksel_con[25],
361 SPI1_DIV_MASK << SPI1_DIV_SHIFT,
362 src_clk_div << SPI1_DIV_SHIFT);
368 return rockchip_spi_get_clk(cru, gclk_rate, periph);
371 #ifdef CONFIG_SPL_BUILD
372 static void rkclk_init(struct rk3188_cru *cru, struct rk3188_grf *grf,
375 u32 aclk_div, hclk_div, pclk_div, h2p_div;
377 /* pll enter slow-mode */
378 rk_clrsetreg(&cru->cru_mode_con,
379 GPLL_MODE_MASK << GPLL_MODE_SHIFT |
380 CPLL_MODE_MASK << CPLL_MODE_SHIFT,
381 GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
382 CPLL_MODE_SLOW << CPLL_MODE_SHIFT);
385 rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg, has_bwadj);
386 rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg, has_bwadj);
388 /* waiting for pll lock */
389 while ((readl(&grf->soc_status0) &
390 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) !=
391 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK))
395 * cpu clock pll source selection and
396 * reparent aclk_cpu_pre from apll to gpll
397 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
399 aclk_div = DIV_ROUND_UP(GPLL_HZ, CPU_ACLK_HZ) - 1;
400 assert((aclk_div + 1) * CPU_ACLK_HZ == GPLL_HZ && aclk_div <= 0x1f);
402 rk_clrsetreg(&cru->cru_clksel_con[0],
403 CPU_ACLK_PLL_MASK << CPU_ACLK_PLL_SHIFT |
404 A9_CPU_DIV_MASK << A9_CPU_DIV_SHIFT,
405 CPU_ACLK_PLL_SELECT_GPLL << CPU_ACLK_PLL_SHIFT |
406 aclk_div << A9_CPU_DIV_SHIFT);
408 hclk_div = ilog2(CPU_ACLK_HZ / CPU_HCLK_HZ);
409 assert((1 << hclk_div) * CPU_HCLK_HZ == CPU_ACLK_HZ && hclk_div < 0x3);
410 pclk_div = ilog2(CPU_ACLK_HZ / CPU_PCLK_HZ);
411 assert((1 << pclk_div) * CPU_PCLK_HZ == CPU_ACLK_HZ && pclk_div < 0x4);
412 h2p_div = ilog2(CPU_HCLK_HZ / CPU_H2P_HZ);
413 assert((1 << h2p_div) * CPU_H2P_HZ == CPU_HCLK_HZ && pclk_div < 0x3);
415 rk_clrsetreg(&cru->cru_clksel_con[1],
416 AHB2APB_DIV_MASK << AHB2APB_DIV_SHIFT |
417 CPU_PCLK_DIV_MASK << CPU_PCLK_DIV_SHIFT |
418 CPU_HCLK_DIV_MASK << CPU_HCLK_DIV_SHIFT,
419 h2p_div << AHB2APB_DIV_SHIFT |
420 pclk_div << CPU_PCLK_DIV_SHIFT |
421 hclk_div << CPU_HCLK_DIV_SHIFT);
424 * peri clock pll source selection and
425 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
427 aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
428 assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
430 hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ);
431 assert((1 << hclk_div) * PERI_HCLK_HZ ==
432 PERI_ACLK_HZ && (hclk_div < 0x4));
434 pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ);
435 assert((1 << pclk_div) * PERI_PCLK_HZ ==
436 PERI_ACLK_HZ && (pclk_div < 0x4));
438 rk_clrsetreg(&cru->cru_clksel_con[10],
439 PERI_PCLK_DIV_MASK << PERI_PCLK_DIV_SHIFT |
440 PERI_HCLK_DIV_MASK << PERI_HCLK_DIV_SHIFT |
441 PERI_ACLK_DIV_MASK << PERI_ACLK_DIV_SHIFT,
442 PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT |
443 pclk_div << PERI_PCLK_DIV_SHIFT |
444 hclk_div << PERI_HCLK_DIV_SHIFT |
445 aclk_div << PERI_ACLK_DIV_SHIFT);
447 /* PLL enter normal-mode */
448 rk_clrsetreg(&cru->cru_mode_con,
449 GPLL_MODE_MASK << GPLL_MODE_SHIFT |
450 CPLL_MODE_MASK << CPLL_MODE_SHIFT,
451 GPLL_MODE_NORMAL << GPLL_MODE_SHIFT |
452 CPLL_MODE_NORMAL << CPLL_MODE_SHIFT);
454 rockchip_mmc_set_clk(cru, PERI_HCLK_HZ, HCLK_SDMMC, 16000000);
458 static ulong rk3188_clk_get_rate(struct clk *clk)
460 struct rk3188_clk_priv *priv = dev_get_priv(clk->dev);
461 ulong new_rate, gclk_rate;
463 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
466 new_rate = rkclk_pll_get_rate(priv->cru, clk->id);
474 new_rate = rockchip_mmc_get_clk(priv->cru, PERI_HCLK_HZ,
479 new_rate = rockchip_spi_get_clk(priv->cru, PERI_PCLK_HZ,
495 static ulong rk3188_clk_set_rate(struct clk *clk, ulong rate)
497 struct rk3188_clk_priv *priv = dev_get_priv(clk->dev);
498 struct rk3188_cru *cru = priv->cru;
503 new_rate = rkclk_configure_cpu(priv->cru, priv->grf, rate,
507 new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate,
516 new_rate = rockchip_mmc_set_clk(cru, PERI_HCLK_HZ,
521 new_rate = rockchip_spi_set_clk(cru, PERI_PCLK_HZ,
531 static struct clk_ops rk3188_clk_ops = {
532 .get_rate = rk3188_clk_get_rate,
533 .set_rate = rk3188_clk_set_rate,
536 static int rk3188_clk_ofdata_to_platdata(struct udevice *dev)
538 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
539 struct rk3188_clk_priv *priv = dev_get_priv(dev);
541 priv->cru = dev_read_addr_ptr(dev);
547 static int rk3188_clk_probe(struct udevice *dev)
549 struct rk3188_clk_priv *priv = dev_get_priv(dev);
550 enum rk3188_clk_type type = dev_get_driver_data(dev);
552 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
553 if (IS_ERR(priv->grf))
554 return PTR_ERR(priv->grf);
555 priv->has_bwadj = (type == RK3188A_CRU) ? 1 : 0;
557 #ifdef CONFIG_SPL_BUILD
558 #if CONFIG_IS_ENABLED(OF_PLATDATA)
559 struct rk3188_clk_plat *plat = dev_get_platdata(dev);
561 priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]);
564 rkclk_init(priv->cru, priv->grf, priv->has_bwadj);
566 /* Init CPU frequency */
567 rkclk_configure_cpu(priv->cru, priv->grf, APLL_HZ, priv->has_bwadj);
573 static int rk3188_clk_bind(struct udevice *dev)
576 struct udevice *sys_child;
577 struct sysreset_reg *priv;
579 /* The reset driver does not have a device node, so bind it here */
580 ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
583 debug("Warning: No sysreset driver: ret=%d\n", ret);
585 priv = malloc(sizeof(struct sysreset_reg));
586 priv->glb_srst_fst_value = offsetof(struct rk3188_cru,
587 cru_glb_srst_fst_value);
588 priv->glb_srst_snd_value = offsetof(struct rk3188_cru,
589 cru_glb_srst_snd_value);
590 sys_child->priv = priv;
593 #if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP)
594 ret = offsetof(struct rk3188_cru, cru_softrst_con[0]);
595 ret = rockchip_reset_bind(dev, ret, 9);
597 debug("Warning: software reset driver bind faile\n");
603 static const struct udevice_id rk3188_clk_ids[] = {
604 { .compatible = "rockchip,rk3188-cru", .data = RK3188_CRU },
605 { .compatible = "rockchip,rk3188a-cru", .data = RK3188A_CRU },
609 U_BOOT_DRIVER(rockchip_rk3188_cru) = {
610 .name = "rockchip_rk3188_cru",
612 .of_match = rk3188_clk_ids,
613 .priv_auto_alloc_size = sizeof(struct rk3188_clk_priv),
614 .platdata_auto_alloc_size = sizeof(struct rk3188_clk_plat),
615 .ops = &rk3188_clk_ops,
616 .bind = rk3188_clk_bind,
617 .ofdata_to_platdata = rk3188_clk_ofdata_to_platdata,
618 .probe = rk3188_clk_probe,