1 /* 2 * (C) Copyright 2015 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <common.h> 8 #include <bitfield.h> 9 #include <clk-uclass.h> 10 #include <dm.h> 11 #include <dt-structs.h> 12 #include <errno.h> 13 #include <mapmem.h> 14 #include <syscon.h> 15 #include <asm/io.h> 16 #include <asm/arch/clock.h> 17 #include <asm/arch/cru_rk3288.h> 18 #include <asm/arch/grf_rk3288.h> 19 #include <asm/arch/hardware.h> 20 #include <dt-bindings/clock/rk3288-cru.h> 21 #include <dm/device-internal.h> 22 #include <dm/lists.h> 23 #include <dm/uclass-internal.h> 24 #include <linux/log2.h> 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 struct rk3288_clk_plat { 29 #if CONFIG_IS_ENABLED(OF_PLATDATA) 30 struct dtd_rockchip_rk3288_cru dtd; 31 #endif 32 }; 33 34 struct pll_div { 35 u32 nr; 36 u32 nf; 37 u32 no; 38 }; 39 40 enum { 41 VCO_MAX_HZ = 2200U * 1000000, 42 VCO_MIN_HZ = 440 * 1000000, 43 OUTPUT_MAX_HZ = 2200U * 1000000, 44 OUTPUT_MIN_HZ = 27500000, 45 FREF_MAX_HZ = 2200U * 1000000, 46 FREF_MIN_HZ = 269 * 1000, 47 }; 48 49 enum { 50 /* PLL CON0 */ 51 PLL_OD_MASK = 0x0f, 52 53 /* PLL CON1 */ 54 PLL_NF_MASK = 0x1fff, 55 56 /* PLL CON2 */ 57 PLL_BWADJ_MASK = 0x0fff, 58 59 /* PLL CON3 */ 60 PLL_RESET_SHIFT = 5, 61 62 /* CLKSEL0 */ 63 CORE_SEL_PLL_SHIFT = 15, 64 CORE_SEL_PLL_MASK = 1 << CORE_SEL_PLL_SHIFT, 65 A17_DIV_SHIFT = 8, 66 A17_DIV_MASK = 0x1f << A17_DIV_SHIFT, 67 MP_DIV_SHIFT = 4, 68 MP_DIV_MASK = 0xf << MP_DIV_SHIFT, 69 M0_DIV_SHIFT = 0, 70 M0_DIV_MASK = 0xf << M0_DIV_SHIFT, 71 72 /* CLKSEL1: pd bus clk pll sel: codec or general */ 73 PD_BUS_SEL_PLL_MASK = 15, 74 PD_BUS_SEL_CPLL = 0, 75 PD_BUS_SEL_GPLL, 76 77 /* pd bus pclk div: pclk = pd_bus_aclk /(div + 1) */ 78 PD_BUS_PCLK_DIV_SHIFT = 12, 79 PD_BUS_PCLK_DIV_MASK = 7 << PD_BUS_PCLK_DIV_SHIFT, 80 81 /* pd bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */ 82 PD_BUS_HCLK_DIV_SHIFT = 8, 83 PD_BUS_HCLK_DIV_MASK = 3 << PD_BUS_HCLK_DIV_SHIFT, 84 85 /* pd bus aclk div: pd_bus_aclk = pd_bus_src_clk /(div0 * div1) */ 86 PD_BUS_ACLK_DIV0_SHIFT = 3, 87 PD_BUS_ACLK_DIV0_MASK = 0x1f << PD_BUS_ACLK_DIV0_SHIFT, 88 PD_BUS_ACLK_DIV1_SHIFT = 0, 89 PD_BUS_ACLK_DIV1_MASK = 0x7 << PD_BUS_ACLK_DIV1_SHIFT, 90 91 /* 92 * CLKSEL10 93 * peripheral bus pclk div: 94 * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1 95 */ 96 PERI_SEL_PLL_SHIFT = 15, 97 PERI_SEL_PLL_MASK = 1 << PERI_SEL_PLL_SHIFT, 98 PERI_SEL_CPLL = 0, 99 PERI_SEL_GPLL, 100 101 PERI_PCLK_DIV_SHIFT = 12, 102 PERI_PCLK_DIV_MASK = 3 << PERI_PCLK_DIV_SHIFT, 103 104 /* peripheral bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */ 105 PERI_HCLK_DIV_SHIFT = 8, 106 PERI_HCLK_DIV_MASK = 3 << PERI_HCLK_DIV_SHIFT, 107 108 /* 109 * peripheral bus aclk div: 110 * aclk_periph = periph_clk_src / (peri_aclk_div_con + 1) 111 */ 112 PERI_ACLK_DIV_SHIFT = 0, 113 PERI_ACLK_DIV_MASK = 0x1f << PERI_ACLK_DIV_SHIFT, 114 115 /* 116 * CLKSEL24 117 * saradc_div_con: 118 * clk_saradc=24MHz/(saradc_div_con+1) 119 */ 120 CLK_SARADC_DIV_CON_SHIFT = 8, 121 CLK_SARADC_DIV_CON_MASK = GENMASK(15, 8), 122 CLK_SARADC_DIV_CON_WIDTH = 8, 123 124 SOCSTS_DPLL_LOCK = 1 << 5, 125 SOCSTS_APLL_LOCK = 1 << 6, 126 SOCSTS_CPLL_LOCK = 1 << 7, 127 SOCSTS_GPLL_LOCK = 1 << 8, 128 SOCSTS_NPLL_LOCK = 1 << 9, 129 }; 130 131 #define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1)) 132 133 #define PLL_DIVISORS(hz, _nr, _no) {\ 134 .nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\ 135 _Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\ 136 (_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\ 137 "divisors on line " __stringify(__LINE__)); 138 139 /* Keep divisors as low as possible to reduce jitter and power usage */ 140 static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1); 141 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2); 142 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2); 143 144 static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id, 145 const struct pll_div *div) 146 { 147 int pll_id = rk_pll_id(clk_id); 148 struct rk3288_pll *pll = &cru->pll[pll_id]; 149 /* All PLLs have same VCO and output frequency range restrictions. */ 150 uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000; 151 uint output_hz = vco_hz / div->no; 152 153 debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n", 154 (uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz); 155 assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ && 156 output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ && 157 (div->no == 1 || !(div->no % 2))); 158 159 /* enter reset */ 160 rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT); 161 162 rk_clrsetreg(&pll->con0, CLKR_MASK | PLL_OD_MASK, 163 ((div->nr - 1) << CLKR_SHIFT) | (div->no - 1)); 164 rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1); 165 rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1); 166 167 udelay(10); 168 169 /* return from reset */ 170 rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT); 171 172 return 0; 173 } 174 175 static int rkclk_configure_ddr(struct rk3288_cru *cru, struct rk3288_grf *grf, 176 unsigned int hz) 177 { 178 static const struct pll_div dpll_cfg[] = { 179 {.nf = 25, .nr = 2, .no = 1}, 180 {.nf = 400, .nr = 9, .no = 2}, 181 {.nf = 500, .nr = 9, .no = 2}, 182 {.nf = 100, .nr = 3, .no = 1}, 183 }; 184 int cfg; 185 186 switch (hz) { 187 case 300000000: 188 cfg = 0; 189 break; 190 case 533000000: /* actually 533.3P MHz */ 191 cfg = 1; 192 break; 193 case 666000000: /* actually 666.6P MHz */ 194 cfg = 2; 195 break; 196 case 800000000: 197 cfg = 3; 198 break; 199 default: 200 debug("Unsupported SDRAM frequency"); 201 return -EINVAL; 202 } 203 204 /* pll enter slow-mode */ 205 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK, 206 DPLL_MODE_SLOW << DPLL_MODE_SHIFT); 207 208 rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg]); 209 210 /* wait for pll lock */ 211 while (!(readl(&grf->soc_status[1]) & SOCSTS_DPLL_LOCK)) 212 udelay(1); 213 214 /* PLL enter normal-mode */ 215 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK, 216 DPLL_MODE_NORMAL << DPLL_MODE_SHIFT); 217 218 return 0; 219 } 220 221 #ifndef CONFIG_SPL_BUILD 222 #define VCO_MAX_KHZ 2200000 223 #define VCO_MIN_KHZ 440000 224 #define FREF_MAX_KHZ 2200000 225 #define FREF_MIN_KHZ 269 226 227 static int pll_para_config(ulong freq_hz, struct pll_div *div, uint *ext_div) 228 { 229 uint ref_khz = OSC_HZ / 1000, nr, nf = 0; 230 uint fref_khz; 231 uint diff_khz, best_diff_khz; 232 const uint max_nr = 1 << 6, max_nf = 1 << 12, max_no = 1 << 4; 233 uint vco_khz; 234 uint no = 1; 235 uint freq_khz = freq_hz / 1000; 236 237 if (!freq_hz) { 238 printf("%s: the frequency can not be 0 Hz\n", __func__); 239 return -EINVAL; 240 } 241 242 no = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz); 243 if (ext_div) { 244 *ext_div = DIV_ROUND_UP(no, max_no); 245 no = DIV_ROUND_UP(no, *ext_div); 246 } 247 248 /* only even divisors (and 1) are supported */ 249 if (no > 1) 250 no = DIV_ROUND_UP(no, 2) * 2; 251 252 vco_khz = freq_khz * no; 253 if (ext_div) 254 vco_khz *= *ext_div; 255 256 if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) { 257 printf("%s: Cannot find out a supported VCO for Frequency (%luHz).\n", 258 __func__, freq_hz); 259 return -1; 260 } 261 262 div->no = no; 263 264 best_diff_khz = vco_khz; 265 for (nr = 1; nr < max_nr && best_diff_khz; nr++) { 266 fref_khz = ref_khz / nr; 267 if (fref_khz < FREF_MIN_KHZ) 268 break; 269 if (fref_khz > FREF_MAX_KHZ) 270 continue; 271 272 nf = vco_khz / fref_khz; 273 if (nf >= max_nf) 274 continue; 275 diff_khz = vco_khz - nf * fref_khz; 276 if (nf + 1 < max_nf && diff_khz > fref_khz / 2) { 277 nf++; 278 diff_khz = fref_khz - diff_khz; 279 } 280 281 if (diff_khz >= best_diff_khz) 282 continue; 283 284 best_diff_khz = diff_khz; 285 div->nr = nr; 286 div->nf = nf; 287 } 288 289 if (best_diff_khz > 4 * 1000) { 290 printf("%s: Failed to match output frequency %lu, difference is %u Hz, exceed 4MHZ\n", 291 __func__, freq_hz, best_diff_khz * 1000); 292 return -EINVAL; 293 } 294 295 return 0; 296 } 297 298 static int rockchip_mac_set_clk(struct rk3288_cru *cru, uint freq) 299 { 300 ulong ret; 301 302 /* 303 * The gmac clock can be derived either from an external clock 304 * or can be generated from internally by a divider from SCLK_MAC. 305 */ 306 if (readl(&cru->cru_clksel_con[21]) & RMII_EXTCLK_MASK) { 307 /* An external clock will always generate the right rate... */ 308 ret = freq; 309 } else { 310 u32 con = readl(&cru->cru_clksel_con[21]); 311 ulong pll_rate; 312 u8 div; 313 314 if (((con >> EMAC_PLL_SHIFT) & EMAC_PLL_MASK) == 315 EMAC_PLL_SELECT_GENERAL) 316 pll_rate = GPLL_HZ; 317 else if (((con >> EMAC_PLL_SHIFT) & EMAC_PLL_MASK) == 318 EMAC_PLL_SELECT_CODEC) 319 pll_rate = CPLL_HZ; 320 else 321 pll_rate = NPLL_HZ; 322 323 div = DIV_ROUND_UP(pll_rate, freq) - 1; 324 if (div <= 0x1f) 325 rk_clrsetreg(&cru->cru_clksel_con[21], MAC_DIV_CON_MASK, 326 div << MAC_DIV_CON_SHIFT); 327 else 328 debug("Unsupported div for gmac:%d\n", div); 329 330 return DIV_TO_RATE(pll_rate, div); 331 } 332 333 return ret; 334 } 335 336 static int rockchip_vop_set_clk(struct rk3288_cru *cru, struct rk3288_grf *grf, 337 int periph, unsigned int rate_hz) 338 { 339 struct pll_div npll_config = {0}; 340 u32 lcdc_div; 341 int ret; 342 343 ret = pll_para_config(rate_hz, &npll_config, &lcdc_div); 344 if (ret) 345 return ret; 346 347 rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK, 348 NPLL_MODE_SLOW << NPLL_MODE_SHIFT); 349 rkclk_set_pll(cru, CLK_NEW, &npll_config); 350 351 /* waiting for pll lock */ 352 while (1) { 353 if (readl(&grf->soc_status[1]) & SOCSTS_NPLL_LOCK) 354 break; 355 udelay(1); 356 } 357 358 rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK, 359 NPLL_MODE_NORMAL << NPLL_MODE_SHIFT); 360 361 /* vop dclk source clk: npll,dclk_div: 1 */ 362 switch (periph) { 363 case DCLK_VOP0: 364 rk_clrsetreg(&cru->cru_clksel_con[27], 0xff << 8 | 3 << 0, 365 (lcdc_div - 1) << 8 | 2 << 0); 366 break; 367 case DCLK_VOP1: 368 rk_clrsetreg(&cru->cru_clksel_con[29], 0xff << 8 | 3 << 6, 369 (lcdc_div - 1) << 8 | 2 << 6); 370 break; 371 } 372 373 return 0; 374 } 375 #endif /* CONFIG_SPL_BUILD */ 376 377 static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf) 378 { 379 u32 aclk_div; 380 u32 hclk_div; 381 u32 pclk_div; 382 383 /* pll enter slow-mode */ 384 rk_clrsetreg(&cru->cru_mode_con, 385 GPLL_MODE_MASK | CPLL_MODE_MASK, 386 GPLL_MODE_SLOW << GPLL_MODE_SHIFT | 387 CPLL_MODE_SLOW << CPLL_MODE_SHIFT); 388 389 /* init pll */ 390 rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg); 391 rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg); 392 393 /* waiting for pll lock */ 394 while ((readl(&grf->soc_status[1]) & 395 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) != 396 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) 397 udelay(1); 398 399 /* 400 * pd_bus clock pll source selection and 401 * set up dependent divisors for PCLK/HCLK and ACLK clocks. 402 */ 403 aclk_div = GPLL_HZ / PD_BUS_ACLK_HZ - 1; 404 assert((aclk_div + 1) * PD_BUS_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f); 405 hclk_div = PD_BUS_ACLK_HZ / PD_BUS_HCLK_HZ - 1; 406 assert((hclk_div + 1) * PD_BUS_HCLK_HZ == 407 PD_BUS_ACLK_HZ && (hclk_div < 0x4) && (hclk_div != 0x2)); 408 409 pclk_div = PD_BUS_ACLK_HZ / PD_BUS_PCLK_HZ - 1; 410 assert((pclk_div + 1) * PD_BUS_PCLK_HZ == 411 PD_BUS_ACLK_HZ && pclk_div < 0x7); 412 413 rk_clrsetreg(&cru->cru_clksel_con[1], 414 PD_BUS_PCLK_DIV_MASK | PD_BUS_HCLK_DIV_MASK | 415 PD_BUS_ACLK_DIV0_MASK | PD_BUS_ACLK_DIV1_MASK, 416 pclk_div << PD_BUS_PCLK_DIV_SHIFT | 417 hclk_div << PD_BUS_HCLK_DIV_SHIFT | 418 aclk_div << PD_BUS_ACLK_DIV0_SHIFT | 419 0 << 0); 420 421 /* 422 * peri clock pll source selection and 423 * set up dependent divisors for PCLK/HCLK and ACLK clocks. 424 */ 425 aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1; 426 assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f); 427 428 hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ); 429 assert((1 << hclk_div) * PERI_HCLK_HZ == 430 PERI_ACLK_HZ && (hclk_div < 0x4)); 431 432 pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ); 433 assert((1 << pclk_div) * PERI_PCLK_HZ == 434 PERI_ACLK_HZ && (pclk_div < 0x4)); 435 436 rk_clrsetreg(&cru->cru_clksel_con[10], 437 PERI_PCLK_DIV_MASK | PERI_HCLK_DIV_MASK | 438 PERI_ACLK_DIV_MASK, 439 PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT | 440 pclk_div << PERI_PCLK_DIV_SHIFT | 441 hclk_div << PERI_HCLK_DIV_SHIFT | 442 aclk_div << PERI_ACLK_DIV_SHIFT); 443 444 /* PLL enter normal-mode */ 445 rk_clrsetreg(&cru->cru_mode_con, 446 GPLL_MODE_MASK | CPLL_MODE_MASK, 447 GPLL_MODE_NORMAL << GPLL_MODE_SHIFT | 448 CPLL_MODE_NORMAL << CPLL_MODE_SHIFT); 449 } 450 451 void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf) 452 { 453 /* pll enter slow-mode */ 454 rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK, 455 APLL_MODE_SLOW << APLL_MODE_SHIFT); 456 457 rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg); 458 459 /* waiting for pll lock */ 460 while (!(readl(&grf->soc_status[1]) & SOCSTS_APLL_LOCK)) 461 udelay(1); 462 463 /* 464 * core clock pll source selection and 465 * set up dependent divisors for MPAXI/M0AXI and ARM clocks. 466 * core clock select apll, apll clk = 1800MHz 467 * arm clk = 1800MHz, mpclk = 450MHz, m0clk = 900MHz 468 */ 469 rk_clrsetreg(&cru->cru_clksel_con[0], 470 CORE_SEL_PLL_MASK | A17_DIV_MASK | MP_DIV_MASK | 471 M0_DIV_MASK, 472 0 << A17_DIV_SHIFT | 473 3 << MP_DIV_SHIFT | 474 1 << M0_DIV_SHIFT); 475 476 /* 477 * set up dependent divisors for L2RAM/ATCLK and PCLK clocks. 478 * l2ramclk = 900MHz, atclk = 450MHz, pclk_dbg = 450MHz 479 */ 480 rk_clrsetreg(&cru->cru_clksel_con[37], 481 CLK_L2RAM_DIV_MASK | ATCLK_CORE_DIV_CON_MASK | 482 PCLK_CORE_DBG_DIV_MASK, 483 1 << CLK_L2RAM_DIV_SHIFT | 484 3 << ATCLK_CORE_DIV_CON_SHIFT | 485 3 << PCLK_CORE_DBG_DIV_SHIFT); 486 487 /* PLL enter normal-mode */ 488 rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK, 489 APLL_MODE_NORMAL << APLL_MODE_SHIFT); 490 } 491 492 /* Get pll rate by id */ 493 static uint32_t rkclk_pll_get_rate(struct rk3288_cru *cru, 494 enum rk_clk_id clk_id) 495 { 496 uint32_t nr, no, nf; 497 uint32_t con; 498 int pll_id = rk_pll_id(clk_id); 499 struct rk3288_pll *pll = &cru->pll[pll_id]; 500 static u8 clk_shift[CLK_COUNT] = { 501 0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT, 502 GPLL_MODE_SHIFT, NPLL_MODE_SHIFT 503 }; 504 uint shift; 505 506 con = readl(&cru->cru_mode_con); 507 shift = clk_shift[clk_id]; 508 switch ((con >> shift) & CRU_MODE_MASK) { 509 case APLL_MODE_SLOW: 510 return OSC_HZ; 511 case APLL_MODE_NORMAL: 512 /* normal mode */ 513 con = readl(&pll->con0); 514 no = ((con & CLKOD_MASK) >> CLKOD_SHIFT) + 1; 515 nr = ((con & CLKR_MASK) >> CLKR_SHIFT) + 1; 516 con = readl(&pll->con1); 517 nf = ((con & CLKF_MASK) >> CLKF_SHIFT) + 1; 518 519 return (24 * nf / (nr * no)) * 1000000; 520 case APLL_MODE_DEEP: 521 default: 522 return 32768; 523 } 524 } 525 526 static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint gclk_rate, 527 int periph) 528 { 529 uint src_rate; 530 uint div, mux; 531 u32 con; 532 533 switch (periph) { 534 case HCLK_EMMC: 535 case SCLK_EMMC: 536 con = readl(&cru->cru_clksel_con[12]); 537 mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT; 538 div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT; 539 break; 540 case HCLK_SDMMC: 541 case SCLK_SDMMC: 542 con = readl(&cru->cru_clksel_con[11]); 543 mux = (con & MMC0_PLL_MASK) >> MMC0_PLL_SHIFT; 544 div = (con & MMC0_DIV_MASK) >> MMC0_DIV_SHIFT; 545 break; 546 case HCLK_SDIO0: 547 case SCLK_SDIO0: 548 con = readl(&cru->cru_clksel_con[12]); 549 mux = (con & SDIO0_PLL_MASK) >> SDIO0_PLL_SHIFT; 550 div = (con & SDIO0_DIV_MASK) >> SDIO0_DIV_SHIFT; 551 break; 552 default: 553 return -EINVAL; 554 } 555 556 src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : gclk_rate; 557 return DIV_TO_RATE(src_rate, div); 558 } 559 560 static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint gclk_rate, 561 int periph, uint freq) 562 { 563 int src_clk_div; 564 int mux; 565 566 debug("%s: gclk_rate=%u\n", __func__, gclk_rate); 567 /* mmc clock default div 2 internal, need provide double in cru */ 568 src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq); 569 570 if (src_clk_div > 0x3f) { 571 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq); 572 assert(src_clk_div < 0x40); 573 mux = EMMC_PLL_SELECT_24MHZ; 574 assert((int)EMMC_PLL_SELECT_24MHZ == 575 (int)MMC0_PLL_SELECT_24MHZ); 576 } else { 577 mux = EMMC_PLL_SELECT_GENERAL; 578 assert((int)EMMC_PLL_SELECT_GENERAL == 579 (int)MMC0_PLL_SELECT_GENERAL); 580 } 581 switch (periph) { 582 case HCLK_EMMC: 583 case SCLK_EMMC: 584 rk_clrsetreg(&cru->cru_clksel_con[12], 585 EMMC_PLL_MASK | EMMC_DIV_MASK, 586 mux << EMMC_PLL_SHIFT | 587 (src_clk_div - 1) << EMMC_DIV_SHIFT); 588 break; 589 case HCLK_SDMMC: 590 case SCLK_SDMMC: 591 rk_clrsetreg(&cru->cru_clksel_con[11], 592 MMC0_PLL_MASK | MMC0_DIV_MASK, 593 mux << MMC0_PLL_SHIFT | 594 (src_clk_div - 1) << MMC0_DIV_SHIFT); 595 break; 596 case HCLK_SDIO0: 597 case SCLK_SDIO0: 598 rk_clrsetreg(&cru->cru_clksel_con[12], 599 SDIO0_PLL_MASK | SDIO0_DIV_MASK, 600 mux << SDIO0_PLL_SHIFT | 601 (src_clk_div - 1) << SDIO0_DIV_SHIFT); 602 break; 603 default: 604 return -EINVAL; 605 } 606 607 return rockchip_mmc_get_clk(cru, gclk_rate, periph); 608 } 609 610 static ulong rockchip_spi_get_clk(struct rk3288_cru *cru, uint gclk_rate, 611 int periph) 612 { 613 uint div, mux; 614 u32 con; 615 616 switch (periph) { 617 case SCLK_SPI0: 618 con = readl(&cru->cru_clksel_con[25]); 619 mux = (con & SPI0_PLL_MASK) >> SPI0_PLL_SHIFT; 620 div = (con & SPI0_DIV_MASK) >> SPI0_DIV_SHIFT; 621 break; 622 case SCLK_SPI1: 623 con = readl(&cru->cru_clksel_con[25]); 624 mux = (con & SPI1_PLL_MASK) >> SPI1_PLL_SHIFT; 625 div = (con & SPI1_DIV_MASK) >> SPI1_DIV_SHIFT; 626 break; 627 case SCLK_SPI2: 628 con = readl(&cru->cru_clksel_con[39]); 629 mux = (con & SPI2_PLL_MASK) >> SPI2_PLL_SHIFT; 630 div = (con & SPI2_DIV_MASK) >> SPI2_DIV_SHIFT; 631 break; 632 default: 633 return -EINVAL; 634 } 635 assert(mux == SPI0_PLL_SELECT_GENERAL); 636 637 return DIV_TO_RATE(gclk_rate, div); 638 } 639 640 static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate, 641 int periph, uint freq) 642 { 643 int src_clk_div; 644 645 debug("%s: clk_general_rate=%u\n", __func__, gclk_rate); 646 src_clk_div = DIV_ROUND_UP(gclk_rate, freq) - 1; 647 assert(src_clk_div < 128); 648 switch (periph) { 649 case SCLK_SPI0: 650 rk_clrsetreg(&cru->cru_clksel_con[25], 651 SPI0_PLL_MASK | SPI0_DIV_MASK, 652 SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT | 653 src_clk_div << SPI0_DIV_SHIFT); 654 break; 655 case SCLK_SPI1: 656 rk_clrsetreg(&cru->cru_clksel_con[25], 657 SPI1_PLL_MASK | SPI1_DIV_MASK, 658 SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT | 659 src_clk_div << SPI1_DIV_SHIFT); 660 break; 661 case SCLK_SPI2: 662 rk_clrsetreg(&cru->cru_clksel_con[39], 663 SPI2_PLL_MASK | SPI2_DIV_MASK, 664 SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT | 665 src_clk_div << SPI2_DIV_SHIFT); 666 break; 667 default: 668 return -EINVAL; 669 } 670 671 return rockchip_spi_get_clk(cru, gclk_rate, periph); 672 } 673 674 static ulong rockchip_saradc_get_clk(struct rk3288_cru *cru) 675 { 676 u32 div, val; 677 678 val = readl(&cru->cru_clksel_con[24]); 679 div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT, 680 CLK_SARADC_DIV_CON_WIDTH); 681 682 return DIV_TO_RATE(OSC_HZ, div); 683 } 684 685 static ulong rockchip_saradc_set_clk(struct rk3288_cru *cru, uint hz) 686 { 687 int src_clk_div; 688 689 src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1; 690 assert(src_clk_div < 128); 691 692 rk_clrsetreg(&cru->cru_clksel_con[24], 693 CLK_SARADC_DIV_CON_MASK, 694 src_clk_div << CLK_SARADC_DIV_CON_SHIFT); 695 696 return rockchip_saradc_get_clk(cru); 697 } 698 699 static ulong rk3288_clk_get_rate(struct clk *clk) 700 { 701 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); 702 ulong new_rate, gclk_rate; 703 704 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL); 705 switch (clk->id) { 706 case 0 ... 63: 707 new_rate = rkclk_pll_get_rate(priv->cru, clk->id); 708 break; 709 case HCLK_EMMC: 710 case HCLK_SDMMC: 711 case HCLK_SDIO0: 712 case SCLK_EMMC: 713 case SCLK_SDMMC: 714 case SCLK_SDIO0: 715 new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id); 716 break; 717 case SCLK_SPI0: 718 case SCLK_SPI1: 719 case SCLK_SPI2: 720 new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id); 721 break; 722 case PCLK_I2C0: 723 case PCLK_I2C1: 724 case PCLK_I2C2: 725 case PCLK_I2C3: 726 case PCLK_I2C4: 727 case PCLK_I2C5: 728 return gclk_rate; 729 case PCLK_PWM: 730 return PD_BUS_PCLK_HZ; 731 case SCLK_SARADC: 732 new_rate = rockchip_saradc_get_clk(priv->cru); 733 break; 734 default: 735 return -ENOENT; 736 } 737 738 return new_rate; 739 } 740 741 static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate) 742 { 743 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); 744 struct rk3288_cru *cru = priv->cru; 745 ulong new_rate, gclk_rate; 746 747 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL); 748 switch (clk->id) { 749 case PLL_APLL: 750 /* We only support a fixed rate here */ 751 if (rate != 1800000000) 752 return -EINVAL; 753 rk3288_clk_configure_cpu(priv->cru, priv->grf); 754 new_rate = rate; 755 break; 756 case CLK_DDR: 757 new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate); 758 break; 759 case HCLK_EMMC: 760 case HCLK_SDMMC: 761 case HCLK_SDIO0: 762 case SCLK_EMMC: 763 case SCLK_SDMMC: 764 case SCLK_SDIO0: 765 new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate); 766 break; 767 case SCLK_SPI0: 768 case SCLK_SPI1: 769 case SCLK_SPI2: 770 new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate); 771 break; 772 #ifndef CONFIG_SPL_BUILD 773 case SCLK_MAC: 774 new_rate = rockchip_mac_set_clk(priv->cru, rate); 775 break; 776 case DCLK_VOP0: 777 case DCLK_VOP1: 778 new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate); 779 break; 780 case SCLK_EDP_24M: 781 /* clk_edp_24M source: 24M */ 782 rk_setreg(&cru->cru_clksel_con[28], 1 << 15); 783 784 /* rst edp */ 785 rk_setreg(&cru->cru_clksel_con[6], 1 << 15); 786 udelay(1); 787 rk_clrreg(&cru->cru_clksel_con[6], 1 << 15); 788 new_rate = rate; 789 break; 790 case ACLK_VOP0: 791 case ACLK_VOP1: { 792 u32 div; 793 794 /* vop aclk source clk: cpll */ 795 div = CPLL_HZ / rate; 796 assert((div - 1 < 64) && (div * rate == CPLL_HZ)); 797 798 switch (clk->id) { 799 case ACLK_VOP0: 800 rk_clrsetreg(&cru->cru_clksel_con[31], 801 3 << 6 | 0x1f << 0, 802 0 << 6 | (div - 1) << 0); 803 break; 804 case ACLK_VOP1: 805 rk_clrsetreg(&cru->cru_clksel_con[31], 806 3 << 14 | 0x1f << 8, 807 0 << 14 | (div - 1) << 8); 808 break; 809 } 810 new_rate = rate; 811 break; 812 } 813 case PCLK_HDMI_CTRL: 814 /* enable pclk hdmi ctrl */ 815 rk_clrreg(&cru->cru_clkgate_con[16], 1 << 9); 816 817 /* software reset hdmi */ 818 rk_setreg(&cru->cru_clkgate_con[7], 1 << 9); 819 udelay(1); 820 rk_clrreg(&cru->cru_clkgate_con[7], 1 << 9); 821 new_rate = rate; 822 break; 823 #endif 824 case SCLK_SARADC: 825 new_rate = rockchip_saradc_set_clk(priv->cru, rate); 826 break; 827 case PLL_GPLL: 828 case PLL_CPLL: 829 case PLL_NPLL: 830 case ACLK_CPU: 831 case HCLK_CPU: 832 case PCLK_CPU: 833 case ACLK_PERI: 834 case HCLK_PERI: 835 case PCLK_PERI: 836 case SCLK_UART0: 837 return 0; 838 default: 839 return -ENOENT; 840 } 841 842 return new_rate; 843 } 844 845 static int __maybe_unused rk3288_gmac_set_parent(struct clk *clk, struct clk *parent) 846 { 847 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); 848 struct rk3288_cru *cru = priv->cru; 849 const char *clock_output_name; 850 int ret; 851 852 /* 853 * If the requested parent is in the same clock-controller and 854 * the id is SCLK_MAC_PLL ("mac_pll_src"), switch to the internal 855 * clock. 856 */ 857 if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_PLL)) { 858 debug("%s: switching GAMC to SCLK_MAC_PLL\n", __func__); 859 rk_clrsetreg(&cru->cru_clksel_con[21], RMII_EXTCLK_MASK, 0); 860 return 0; 861 } 862 863 /* 864 * Otherwise, we need to check the clock-output-names of the 865 * requested parent to see if the requested id is "ext_gmac". 866 */ 867 ret = dev_read_string_index(parent->dev, "clock-output-names", 868 parent->id, &clock_output_name); 869 if (ret < 0) 870 return -ENODATA; 871 872 /* If this is "ext_gmac", switch to the external clock input */ 873 if (!strcmp(clock_output_name, "ext_gmac")) { 874 debug("%s: switching GMAC to external clock\n", __func__); 875 rk_clrsetreg(&cru->cru_clksel_con[21], RMII_EXTCLK_MASK, 876 RMII_EXTCLK_SELECT_EXT_CLK << RMII_EXTCLK_SHIFT); 877 return 0; 878 } 879 880 return -EINVAL; 881 } 882 883 static int __maybe_unused rk3288_clk_set_parent(struct clk *clk, struct clk *parent) 884 { 885 switch (clk->id) { 886 case SCLK_MAC: 887 return rk3288_gmac_set_parent(clk, parent); 888 case SCLK_USBPHY480M_SRC: 889 return 0; 890 } 891 892 debug("%s: unsupported clk %ld\n", __func__, clk->id); 893 return -ENOENT; 894 } 895 896 static struct clk_ops rk3288_clk_ops = { 897 .get_rate = rk3288_clk_get_rate, 898 .set_rate = rk3288_clk_set_rate, 899 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) 900 .set_parent = rk3288_clk_set_parent, 901 #endif 902 }; 903 904 static int rk3288_clk_ofdata_to_platdata(struct udevice *dev) 905 { 906 #if !CONFIG_IS_ENABLED(OF_PLATDATA) 907 struct rk3288_clk_priv *priv = dev_get_priv(dev); 908 909 priv->cru = dev_read_addr_ptr(dev); 910 #endif 911 912 return 0; 913 } 914 915 static int rk3288_clk_probe(struct udevice *dev) 916 { 917 struct rk3288_clk_priv *priv = dev_get_priv(dev); 918 bool init_clocks = false; 919 920 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 921 if (IS_ERR(priv->grf)) 922 return PTR_ERR(priv->grf); 923 #ifdef CONFIG_SPL_BUILD 924 #if CONFIG_IS_ENABLED(OF_PLATDATA) 925 struct rk3288_clk_plat *plat = dev_get_platdata(dev); 926 927 priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]); 928 #endif 929 init_clocks = true; 930 #endif 931 if (!(gd->flags & GD_FLG_RELOC)) { 932 u32 reg; 933 934 /* 935 * Init clocks in U-Boot proper if the NPLL is runnning. This 936 * indicates that a previous boot loader set up the clocks, so 937 * we need to redo it. U-Boot's SPL does not set this clock. 938 */ 939 reg = readl(&priv->cru->cru_mode_con); 940 if (((reg & NPLL_MODE_MASK) >> NPLL_MODE_SHIFT) == 941 NPLL_MODE_NORMAL) 942 init_clocks = true; 943 } 944 945 if (init_clocks) 946 rkclk_init(priv->cru, priv->grf); 947 948 return 0; 949 } 950 951 static int rk3288_clk_bind(struct udevice *dev) 952 { 953 int ret; 954 struct udevice *sys_child; 955 struct sysreset_reg *priv; 956 957 /* The reset driver does not have a device node, so bind it here */ 958 ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset", 959 &sys_child); 960 if (ret) { 961 debug("Warning: No sysreset driver: ret=%d\n", ret); 962 } else { 963 priv = malloc(sizeof(struct sysreset_reg)); 964 priv->glb_srst_fst_value = offsetof(struct rk3288_cru, 965 cru_glb_srst_fst_value); 966 priv->glb_srst_snd_value = offsetof(struct rk3288_cru, 967 cru_glb_srst_snd_value); 968 sys_child->priv = priv; 969 } 970 971 #if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP) 972 ret = offsetof(struct rk3288_cru, cru_softrst_con[0]); 973 ret = rockchip_reset_bind(dev, ret, 12); 974 if (ret) 975 debug("Warning: software reset driver bind faile\n"); 976 #endif 977 978 return 0; 979 } 980 981 static const struct udevice_id rk3288_clk_ids[] = { 982 { .compatible = "rockchip,rk3288-cru" }, 983 { } 984 }; 985 986 U_BOOT_DRIVER(rockchip_rk3288_cru) = { 987 .name = "rockchip_rk3288_cru", 988 .id = UCLASS_CLK, 989 .of_match = rk3288_clk_ids, 990 .priv_auto_alloc_size = sizeof(struct rk3288_clk_priv), 991 .platdata_auto_alloc_size = sizeof(struct rk3288_clk_plat), 992 .ops = &rk3288_clk_ops, 993 .bind = rk3288_clk_bind, 994 .ofdata_to_platdata = rk3288_clk_ofdata_to_platdata, 995 .probe = rk3288_clk_probe, 996 }; 997