1 /* 2 * (C) Copyright 2015 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <common.h> 8 #include <clk-uclass.h> 9 #include <dm.h> 10 #include <dt-structs.h> 11 #include <errno.h> 12 #include <mapmem.h> 13 #include <syscon.h> 14 #include <asm/io.h> 15 #include <asm/arch/clock.h> 16 #include <asm/arch/cru_rk3288.h> 17 #include <asm/arch/grf_rk3288.h> 18 #include <asm/arch/hardware.h> 19 #include <dt-bindings/clock/rk3288-cru.h> 20 #include <dm/device-internal.h> 21 #include <dm/lists.h> 22 #include <dm/uclass-internal.h> 23 #include <linux/log2.h> 24 25 DECLARE_GLOBAL_DATA_PTR; 26 27 struct rk3288_clk_plat { 28 #if CONFIG_IS_ENABLED(OF_PLATDATA) 29 struct dtd_rockchip_rk3288_cru dtd; 30 #endif 31 }; 32 33 struct pll_div { 34 u32 nr; 35 u32 nf; 36 u32 no; 37 }; 38 39 enum { 40 VCO_MAX_HZ = 2200U * 1000000, 41 VCO_MIN_HZ = 440 * 1000000, 42 OUTPUT_MAX_HZ = 2200U * 1000000, 43 OUTPUT_MIN_HZ = 27500000, 44 FREF_MAX_HZ = 2200U * 1000000, 45 FREF_MIN_HZ = 269 * 1000, 46 }; 47 48 enum { 49 /* PLL CON0 */ 50 PLL_OD_MASK = 0x0f, 51 52 /* PLL CON1 */ 53 PLL_NF_MASK = 0x1fff, 54 55 /* PLL CON2 */ 56 PLL_BWADJ_MASK = 0x0fff, 57 58 /* PLL CON3 */ 59 PLL_RESET_SHIFT = 5, 60 61 /* CLKSEL0 */ 62 CORE_SEL_PLL_SHIFT = 15, 63 CORE_SEL_PLL_MASK = 1 << CORE_SEL_PLL_SHIFT, 64 A17_DIV_SHIFT = 8, 65 A17_DIV_MASK = 0x1f << A17_DIV_SHIFT, 66 MP_DIV_SHIFT = 4, 67 MP_DIV_MASK = 0xf << MP_DIV_SHIFT, 68 M0_DIV_SHIFT = 0, 69 M0_DIV_MASK = 0xf << M0_DIV_SHIFT, 70 71 /* CLKSEL1: pd bus clk pll sel: codec or general */ 72 PD_BUS_SEL_PLL_MASK = 15, 73 PD_BUS_SEL_CPLL = 0, 74 PD_BUS_SEL_GPLL, 75 76 /* pd bus pclk div: pclk = pd_bus_aclk /(div + 1) */ 77 PD_BUS_PCLK_DIV_SHIFT = 12, 78 PD_BUS_PCLK_DIV_MASK = 7 << PD_BUS_PCLK_DIV_SHIFT, 79 80 /* pd bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */ 81 PD_BUS_HCLK_DIV_SHIFT = 8, 82 PD_BUS_HCLK_DIV_MASK = 3 << PD_BUS_HCLK_DIV_SHIFT, 83 84 /* pd bus aclk div: pd_bus_aclk = pd_bus_src_clk /(div0 * div1) */ 85 PD_BUS_ACLK_DIV0_SHIFT = 3, 86 PD_BUS_ACLK_DIV0_MASK = 0x1f << PD_BUS_ACLK_DIV0_SHIFT, 87 PD_BUS_ACLK_DIV1_SHIFT = 0, 88 PD_BUS_ACLK_DIV1_MASK = 0x7 << PD_BUS_ACLK_DIV1_SHIFT, 89 90 /* 91 * CLKSEL10 92 * peripheral bus pclk div: 93 * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1 94 */ 95 PERI_SEL_PLL_SHIFT = 15, 96 PERI_SEL_PLL_MASK = 1 << PERI_SEL_PLL_SHIFT, 97 PERI_SEL_CPLL = 0, 98 PERI_SEL_GPLL, 99 100 PERI_PCLK_DIV_SHIFT = 12, 101 PERI_PCLK_DIV_MASK = 3 << PERI_PCLK_DIV_SHIFT, 102 103 /* peripheral bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */ 104 PERI_HCLK_DIV_SHIFT = 8, 105 PERI_HCLK_DIV_MASK = 3 << PERI_HCLK_DIV_SHIFT, 106 107 /* 108 * peripheral bus aclk div: 109 * aclk_periph = periph_clk_src / (peri_aclk_div_con + 1) 110 */ 111 PERI_ACLK_DIV_SHIFT = 0, 112 PERI_ACLK_DIV_MASK = 0x1f << PERI_ACLK_DIV_SHIFT, 113 114 SOCSTS_DPLL_LOCK = 1 << 5, 115 SOCSTS_APLL_LOCK = 1 << 6, 116 SOCSTS_CPLL_LOCK = 1 << 7, 117 SOCSTS_GPLL_LOCK = 1 << 8, 118 SOCSTS_NPLL_LOCK = 1 << 9, 119 }; 120 121 #define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1)) 122 123 #define PLL_DIVISORS(hz, _nr, _no) {\ 124 .nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\ 125 _Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\ 126 (_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\ 127 "divisors on line " __stringify(__LINE__)); 128 129 /* Keep divisors as low as possible to reduce jitter and power usage */ 130 static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1); 131 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2); 132 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2); 133 134 static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id, 135 const struct pll_div *div) 136 { 137 int pll_id = rk_pll_id(clk_id); 138 struct rk3288_pll *pll = &cru->pll[pll_id]; 139 /* All PLLs have same VCO and output frequency range restrictions. */ 140 uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000; 141 uint output_hz = vco_hz / div->no; 142 143 debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n", 144 (uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz); 145 assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ && 146 output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ && 147 (div->no == 1 || !(div->no % 2))); 148 149 /* enter reset */ 150 rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT); 151 152 rk_clrsetreg(&pll->con0, CLKR_MASK | PLL_OD_MASK, 153 ((div->nr - 1) << CLKR_SHIFT) | (div->no - 1)); 154 rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1); 155 rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1); 156 157 udelay(10); 158 159 /* return from reset */ 160 rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT); 161 162 return 0; 163 } 164 165 static int rkclk_configure_ddr(struct rk3288_cru *cru, struct rk3288_grf *grf, 166 unsigned int hz) 167 { 168 static const struct pll_div dpll_cfg[] = { 169 {.nf = 25, .nr = 2, .no = 1}, 170 {.nf = 400, .nr = 9, .no = 2}, 171 {.nf = 500, .nr = 9, .no = 2}, 172 {.nf = 100, .nr = 3, .no = 1}, 173 }; 174 int cfg; 175 176 switch (hz) { 177 case 300000000: 178 cfg = 0; 179 break; 180 case 533000000: /* actually 533.3P MHz */ 181 cfg = 1; 182 break; 183 case 666000000: /* actually 666.6P MHz */ 184 cfg = 2; 185 break; 186 case 800000000: 187 cfg = 3; 188 break; 189 default: 190 debug("Unsupported SDRAM frequency"); 191 return -EINVAL; 192 } 193 194 /* pll enter slow-mode */ 195 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK, 196 DPLL_MODE_SLOW << DPLL_MODE_SHIFT); 197 198 rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg]); 199 200 /* wait for pll lock */ 201 while (!(readl(&grf->soc_status[1]) & SOCSTS_DPLL_LOCK)) 202 udelay(1); 203 204 /* PLL enter normal-mode */ 205 rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK, 206 DPLL_MODE_NORMAL << DPLL_MODE_SHIFT); 207 208 return 0; 209 } 210 211 #ifndef CONFIG_SPL_BUILD 212 #define VCO_MAX_KHZ 2200000 213 #define VCO_MIN_KHZ 440000 214 #define FREF_MAX_KHZ 2200000 215 #define FREF_MIN_KHZ 269 216 217 static int pll_para_config(ulong freq_hz, struct pll_div *div, uint *ext_div) 218 { 219 uint ref_khz = OSC_HZ / 1000, nr, nf = 0; 220 uint fref_khz; 221 uint diff_khz, best_diff_khz; 222 const uint max_nr = 1 << 6, max_nf = 1 << 12, max_no = 1 << 4; 223 uint vco_khz; 224 uint no = 1; 225 uint freq_khz = freq_hz / 1000; 226 227 if (!freq_hz) { 228 printf("%s: the frequency can not be 0 Hz\n", __func__); 229 return -EINVAL; 230 } 231 232 no = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz); 233 if (ext_div) { 234 *ext_div = DIV_ROUND_UP(no, max_no); 235 no = DIV_ROUND_UP(no, *ext_div); 236 } 237 238 /* only even divisors (and 1) are supported */ 239 if (no > 1) 240 no = DIV_ROUND_UP(no, 2) * 2; 241 242 vco_khz = freq_khz * no; 243 if (ext_div) 244 vco_khz *= *ext_div; 245 246 if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) { 247 printf("%s: Cannot find out a supported VCO for Frequency (%luHz).\n", 248 __func__, freq_hz); 249 return -1; 250 } 251 252 div->no = no; 253 254 best_diff_khz = vco_khz; 255 for (nr = 1; nr < max_nr && best_diff_khz; nr++) { 256 fref_khz = ref_khz / nr; 257 if (fref_khz < FREF_MIN_KHZ) 258 break; 259 if (fref_khz > FREF_MAX_KHZ) 260 continue; 261 262 nf = vco_khz / fref_khz; 263 if (nf >= max_nf) 264 continue; 265 diff_khz = vco_khz - nf * fref_khz; 266 if (nf + 1 < max_nf && diff_khz > fref_khz / 2) { 267 nf++; 268 diff_khz = fref_khz - diff_khz; 269 } 270 271 if (diff_khz >= best_diff_khz) 272 continue; 273 274 best_diff_khz = diff_khz; 275 div->nr = nr; 276 div->nf = nf; 277 } 278 279 if (best_diff_khz > 4 * 1000) { 280 printf("%s: Failed to match output frequency %lu, difference is %u Hz, exceed 4MHZ\n", 281 __func__, freq_hz, best_diff_khz * 1000); 282 return -EINVAL; 283 } 284 285 return 0; 286 } 287 288 static int rockchip_mac_set_clk(struct rk3288_cru *cru, 289 int periph, uint freq) 290 { 291 /* Assuming mac_clk is fed by an external clock */ 292 rk_clrsetreg(&cru->cru_clksel_con[21], 293 RMII_EXTCLK_MASK, 294 RMII_EXTCLK_SELECT_EXT_CLK << RMII_EXTCLK_SHIFT); 295 296 return 0; 297 } 298 299 static int rockchip_vop_set_clk(struct rk3288_cru *cru, struct rk3288_grf *grf, 300 int periph, unsigned int rate_hz) 301 { 302 struct pll_div npll_config = {0}; 303 u32 lcdc_div; 304 int ret; 305 306 ret = pll_para_config(rate_hz, &npll_config, &lcdc_div); 307 if (ret) 308 return ret; 309 310 rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK, 311 NPLL_MODE_SLOW << NPLL_MODE_SHIFT); 312 rkclk_set_pll(cru, CLK_NEW, &npll_config); 313 314 /* waiting for pll lock */ 315 while (1) { 316 if (readl(&grf->soc_status[1]) & SOCSTS_NPLL_LOCK) 317 break; 318 udelay(1); 319 } 320 321 rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK, 322 NPLL_MODE_NORMAL << NPLL_MODE_SHIFT); 323 324 /* vop dclk source clk: npll,dclk_div: 1 */ 325 switch (periph) { 326 case DCLK_VOP0: 327 rk_clrsetreg(&cru->cru_clksel_con[27], 0xff << 8 | 3 << 0, 328 (lcdc_div - 1) << 8 | 2 << 0); 329 break; 330 case DCLK_VOP1: 331 rk_clrsetreg(&cru->cru_clksel_con[29], 0xff << 8 | 3 << 6, 332 (lcdc_div - 1) << 8 | 2 << 6); 333 break; 334 } 335 336 return 0; 337 } 338 #endif /* CONFIG_SPL_BUILD */ 339 340 static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf) 341 { 342 u32 aclk_div; 343 u32 hclk_div; 344 u32 pclk_div; 345 346 /* pll enter slow-mode */ 347 rk_clrsetreg(&cru->cru_mode_con, 348 GPLL_MODE_MASK | CPLL_MODE_MASK, 349 GPLL_MODE_SLOW << GPLL_MODE_SHIFT | 350 CPLL_MODE_SLOW << CPLL_MODE_SHIFT); 351 352 /* init pll */ 353 rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg); 354 rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg); 355 356 /* waiting for pll lock */ 357 while ((readl(&grf->soc_status[1]) & 358 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) != 359 (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) 360 udelay(1); 361 362 /* 363 * pd_bus clock pll source selection and 364 * set up dependent divisors for PCLK/HCLK and ACLK clocks. 365 */ 366 aclk_div = GPLL_HZ / PD_BUS_ACLK_HZ - 1; 367 assert((aclk_div + 1) * PD_BUS_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f); 368 hclk_div = PD_BUS_ACLK_HZ / PD_BUS_HCLK_HZ - 1; 369 assert((hclk_div + 1) * PD_BUS_HCLK_HZ == 370 PD_BUS_ACLK_HZ && (hclk_div < 0x4) && (hclk_div != 0x2)); 371 372 pclk_div = PD_BUS_ACLK_HZ / PD_BUS_PCLK_HZ - 1; 373 assert((pclk_div + 1) * PD_BUS_PCLK_HZ == 374 PD_BUS_ACLK_HZ && pclk_div < 0x7); 375 376 rk_clrsetreg(&cru->cru_clksel_con[1], 377 PD_BUS_PCLK_DIV_MASK | PD_BUS_HCLK_DIV_MASK | 378 PD_BUS_ACLK_DIV0_MASK | PD_BUS_ACLK_DIV1_MASK, 379 pclk_div << PD_BUS_PCLK_DIV_SHIFT | 380 hclk_div << PD_BUS_HCLK_DIV_SHIFT | 381 aclk_div << PD_BUS_ACLK_DIV0_SHIFT | 382 0 << 0); 383 384 /* 385 * peri clock pll source selection and 386 * set up dependent divisors for PCLK/HCLK and ACLK clocks. 387 */ 388 aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1; 389 assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f); 390 391 hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ); 392 assert((1 << hclk_div) * PERI_HCLK_HZ == 393 PERI_ACLK_HZ && (hclk_div < 0x4)); 394 395 pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ); 396 assert((1 << pclk_div) * PERI_PCLK_HZ == 397 PERI_ACLK_HZ && (pclk_div < 0x4)); 398 399 rk_clrsetreg(&cru->cru_clksel_con[10], 400 PERI_PCLK_DIV_MASK | PERI_HCLK_DIV_MASK | 401 PERI_ACLK_DIV_MASK, 402 PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT | 403 pclk_div << PERI_PCLK_DIV_SHIFT | 404 hclk_div << PERI_HCLK_DIV_SHIFT | 405 aclk_div << PERI_ACLK_DIV_SHIFT); 406 407 /* PLL enter normal-mode */ 408 rk_clrsetreg(&cru->cru_mode_con, 409 GPLL_MODE_MASK | CPLL_MODE_MASK, 410 GPLL_MODE_NORMAL << GPLL_MODE_SHIFT | 411 CPLL_MODE_NORMAL << CPLL_MODE_SHIFT); 412 } 413 414 void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf) 415 { 416 /* pll enter slow-mode */ 417 rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK, 418 APLL_MODE_SLOW << APLL_MODE_SHIFT); 419 420 rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg); 421 422 /* waiting for pll lock */ 423 while (!(readl(&grf->soc_status[1]) & SOCSTS_APLL_LOCK)) 424 udelay(1); 425 426 /* 427 * core clock pll source selection and 428 * set up dependent divisors for MPAXI/M0AXI and ARM clocks. 429 * core clock select apll, apll clk = 1800MHz 430 * arm clk = 1800MHz, mpclk = 450MHz, m0clk = 900MHz 431 */ 432 rk_clrsetreg(&cru->cru_clksel_con[0], 433 CORE_SEL_PLL_MASK | A17_DIV_MASK | MP_DIV_MASK | 434 M0_DIV_MASK, 435 0 << A17_DIV_SHIFT | 436 3 << MP_DIV_SHIFT | 437 1 << M0_DIV_SHIFT); 438 439 /* 440 * set up dependent divisors for L2RAM/ATCLK and PCLK clocks. 441 * l2ramclk = 900MHz, atclk = 450MHz, pclk_dbg = 450MHz 442 */ 443 rk_clrsetreg(&cru->cru_clksel_con[37], 444 CLK_L2RAM_DIV_MASK | ATCLK_CORE_DIV_CON_MASK | 445 PCLK_CORE_DBG_DIV_MASK, 446 1 << CLK_L2RAM_DIV_SHIFT | 447 3 << ATCLK_CORE_DIV_CON_SHIFT | 448 3 << PCLK_CORE_DBG_DIV_SHIFT); 449 450 /* PLL enter normal-mode */ 451 rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK, 452 APLL_MODE_NORMAL << APLL_MODE_SHIFT); 453 } 454 455 /* Get pll rate by id */ 456 static uint32_t rkclk_pll_get_rate(struct rk3288_cru *cru, 457 enum rk_clk_id clk_id) 458 { 459 uint32_t nr, no, nf; 460 uint32_t con; 461 int pll_id = rk_pll_id(clk_id); 462 struct rk3288_pll *pll = &cru->pll[pll_id]; 463 static u8 clk_shift[CLK_COUNT] = { 464 0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT, 465 GPLL_MODE_SHIFT, NPLL_MODE_SHIFT 466 }; 467 uint shift; 468 469 con = readl(&cru->cru_mode_con); 470 shift = clk_shift[clk_id]; 471 switch ((con >> shift) & CRU_MODE_MASK) { 472 case APLL_MODE_SLOW: 473 return OSC_HZ; 474 case APLL_MODE_NORMAL: 475 /* normal mode */ 476 con = readl(&pll->con0); 477 no = ((con & CLKOD_MASK) >> CLKOD_SHIFT) + 1; 478 nr = ((con & CLKR_MASK) >> CLKR_SHIFT) + 1; 479 con = readl(&pll->con1); 480 nf = ((con & CLKF_MASK) >> CLKF_SHIFT) + 1; 481 482 return (24 * nf / (nr * no)) * 1000000; 483 case APLL_MODE_DEEP: 484 default: 485 return 32768; 486 } 487 } 488 489 static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint gclk_rate, 490 int periph) 491 { 492 uint src_rate; 493 uint div, mux; 494 u32 con; 495 496 switch (periph) { 497 case HCLK_EMMC: 498 case SCLK_EMMC: 499 con = readl(&cru->cru_clksel_con[12]); 500 mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT; 501 div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT; 502 break; 503 case HCLK_SDMMC: 504 case SCLK_SDMMC: 505 con = readl(&cru->cru_clksel_con[11]); 506 mux = (con & MMC0_PLL_MASK) >> MMC0_PLL_SHIFT; 507 div = (con & MMC0_DIV_MASK) >> MMC0_DIV_SHIFT; 508 break; 509 case HCLK_SDIO0: 510 case SCLK_SDIO0: 511 con = readl(&cru->cru_clksel_con[12]); 512 mux = (con & SDIO0_PLL_MASK) >> SDIO0_PLL_SHIFT; 513 div = (con & SDIO0_DIV_MASK) >> SDIO0_DIV_SHIFT; 514 break; 515 default: 516 return -EINVAL; 517 } 518 519 src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : gclk_rate; 520 return DIV_TO_RATE(src_rate, div); 521 } 522 523 static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint gclk_rate, 524 int periph, uint freq) 525 { 526 int src_clk_div; 527 int mux; 528 529 debug("%s: gclk_rate=%u\n", __func__, gclk_rate); 530 /* mmc clock default div 2 internal, need provide double in cru */ 531 src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq); 532 533 if (src_clk_div > 0x3f) { 534 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq); 535 assert(src_clk_div < 0x40); 536 mux = EMMC_PLL_SELECT_24MHZ; 537 assert((int)EMMC_PLL_SELECT_24MHZ == 538 (int)MMC0_PLL_SELECT_24MHZ); 539 } else { 540 mux = EMMC_PLL_SELECT_GENERAL; 541 assert((int)EMMC_PLL_SELECT_GENERAL == 542 (int)MMC0_PLL_SELECT_GENERAL); 543 } 544 switch (periph) { 545 case HCLK_EMMC: 546 case SCLK_EMMC: 547 rk_clrsetreg(&cru->cru_clksel_con[12], 548 EMMC_PLL_MASK | EMMC_DIV_MASK, 549 mux << EMMC_PLL_SHIFT | 550 (src_clk_div - 1) << EMMC_DIV_SHIFT); 551 break; 552 case HCLK_SDMMC: 553 case SCLK_SDMMC: 554 rk_clrsetreg(&cru->cru_clksel_con[11], 555 MMC0_PLL_MASK | MMC0_DIV_MASK, 556 mux << MMC0_PLL_SHIFT | 557 (src_clk_div - 1) << MMC0_DIV_SHIFT); 558 break; 559 case HCLK_SDIO0: 560 case SCLK_SDIO0: 561 rk_clrsetreg(&cru->cru_clksel_con[12], 562 SDIO0_PLL_MASK | SDIO0_DIV_MASK, 563 mux << SDIO0_PLL_SHIFT | 564 (src_clk_div - 1) << SDIO0_DIV_SHIFT); 565 break; 566 default: 567 return -EINVAL; 568 } 569 570 return rockchip_mmc_get_clk(cru, gclk_rate, periph); 571 } 572 573 static ulong rockchip_spi_get_clk(struct rk3288_cru *cru, uint gclk_rate, 574 int periph) 575 { 576 uint div, mux; 577 u32 con; 578 579 switch (periph) { 580 case SCLK_SPI0: 581 con = readl(&cru->cru_clksel_con[25]); 582 mux = (con & SPI0_PLL_MASK) >> SPI0_PLL_SHIFT; 583 div = (con & SPI0_DIV_MASK) >> SPI0_DIV_SHIFT; 584 break; 585 case SCLK_SPI1: 586 con = readl(&cru->cru_clksel_con[25]); 587 mux = (con & SPI1_PLL_MASK) >> SPI1_PLL_SHIFT; 588 div = (con & SPI1_DIV_MASK) >> SPI1_DIV_SHIFT; 589 break; 590 case SCLK_SPI2: 591 con = readl(&cru->cru_clksel_con[39]); 592 mux = (con & SPI2_PLL_MASK) >> SPI2_PLL_SHIFT; 593 div = (con & SPI2_DIV_MASK) >> SPI2_DIV_SHIFT; 594 break; 595 default: 596 return -EINVAL; 597 } 598 assert(mux == SPI0_PLL_SELECT_GENERAL); 599 600 return DIV_TO_RATE(gclk_rate, div); 601 } 602 603 static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate, 604 int periph, uint freq) 605 { 606 int src_clk_div; 607 608 debug("%s: clk_general_rate=%u\n", __func__, gclk_rate); 609 src_clk_div = DIV_ROUND_UP(gclk_rate, freq) - 1; 610 assert(src_clk_div < 128); 611 switch (periph) { 612 case SCLK_SPI0: 613 rk_clrsetreg(&cru->cru_clksel_con[25], 614 SPI0_PLL_MASK | SPI0_DIV_MASK, 615 SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT | 616 src_clk_div << SPI0_DIV_SHIFT); 617 break; 618 case SCLK_SPI1: 619 rk_clrsetreg(&cru->cru_clksel_con[25], 620 SPI1_PLL_MASK | SPI1_DIV_MASK, 621 SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT | 622 src_clk_div << SPI1_DIV_SHIFT); 623 break; 624 case SCLK_SPI2: 625 rk_clrsetreg(&cru->cru_clksel_con[39], 626 SPI2_PLL_MASK | SPI2_DIV_MASK, 627 SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT | 628 src_clk_div << SPI2_DIV_SHIFT); 629 break; 630 default: 631 return -EINVAL; 632 } 633 634 return rockchip_spi_get_clk(cru, gclk_rate, periph); 635 } 636 637 static ulong rk3288_clk_get_rate(struct clk *clk) 638 { 639 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); 640 ulong new_rate, gclk_rate; 641 642 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL); 643 switch (clk->id) { 644 case 0 ... 63: 645 new_rate = rkclk_pll_get_rate(priv->cru, clk->id); 646 break; 647 case HCLK_EMMC: 648 case HCLK_SDMMC: 649 case HCLK_SDIO0: 650 case SCLK_EMMC: 651 case SCLK_SDMMC: 652 case SCLK_SDIO0: 653 new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id); 654 break; 655 case SCLK_SPI0: 656 case SCLK_SPI1: 657 case SCLK_SPI2: 658 new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id); 659 break; 660 case PCLK_I2C0: 661 case PCLK_I2C1: 662 case PCLK_I2C2: 663 case PCLK_I2C3: 664 case PCLK_I2C4: 665 case PCLK_I2C5: 666 return gclk_rate; 667 case PCLK_PWM: 668 return PD_BUS_PCLK_HZ; 669 default: 670 return -ENOENT; 671 } 672 673 return new_rate; 674 } 675 676 static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate) 677 { 678 struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); 679 struct rk3288_cru *cru = priv->cru; 680 ulong new_rate, gclk_rate; 681 682 gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL); 683 switch (clk->id) { 684 case PLL_APLL: 685 /* We only support a fixed rate here */ 686 if (rate != 1800000000) 687 return -EINVAL; 688 rk3288_clk_configure_cpu(priv->cru, priv->grf); 689 new_rate = rate; 690 break; 691 case CLK_DDR: 692 new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate); 693 break; 694 case HCLK_EMMC: 695 case HCLK_SDMMC: 696 case HCLK_SDIO0: 697 case SCLK_EMMC: 698 case SCLK_SDMMC: 699 case SCLK_SDIO0: 700 new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate); 701 break; 702 case SCLK_SPI0: 703 case SCLK_SPI1: 704 case SCLK_SPI2: 705 new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate); 706 break; 707 #ifndef CONFIG_SPL_BUILD 708 case SCLK_MAC: 709 new_rate = rockchip_mac_set_clk(priv->cru, clk->id, rate); 710 break; 711 case DCLK_VOP0: 712 case DCLK_VOP1: 713 new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate); 714 break; 715 case SCLK_EDP_24M: 716 /* clk_edp_24M source: 24M */ 717 rk_setreg(&cru->cru_clksel_con[28], 1 << 15); 718 719 /* rst edp */ 720 rk_setreg(&cru->cru_clksel_con[6], 1 << 15); 721 udelay(1); 722 rk_clrreg(&cru->cru_clksel_con[6], 1 << 15); 723 new_rate = rate; 724 break; 725 case ACLK_VOP0: 726 case ACLK_VOP1: { 727 u32 div; 728 729 /* vop aclk source clk: cpll */ 730 div = CPLL_HZ / rate; 731 assert((div - 1 < 64) && (div * rate == CPLL_HZ)); 732 733 switch (clk->id) { 734 case ACLK_VOP0: 735 rk_clrsetreg(&cru->cru_clksel_con[31], 736 3 << 6 | 0x1f << 0, 737 0 << 6 | (div - 1) << 0); 738 break; 739 case ACLK_VOP1: 740 rk_clrsetreg(&cru->cru_clksel_con[31], 741 3 << 14 | 0x1f << 8, 742 0 << 14 | (div - 1) << 8); 743 break; 744 } 745 new_rate = rate; 746 break; 747 } 748 case PCLK_HDMI_CTRL: 749 /* enable pclk hdmi ctrl */ 750 rk_clrreg(&cru->cru_clkgate_con[16], 1 << 9); 751 752 /* software reset hdmi */ 753 rk_setreg(&cru->cru_clkgate_con[7], 1 << 9); 754 udelay(1); 755 rk_clrreg(&cru->cru_clkgate_con[7], 1 << 9); 756 new_rate = rate; 757 break; 758 #endif 759 default: 760 return -ENOENT; 761 } 762 763 return new_rate; 764 } 765 766 static struct clk_ops rk3288_clk_ops = { 767 .get_rate = rk3288_clk_get_rate, 768 .set_rate = rk3288_clk_set_rate, 769 }; 770 771 static int rk3288_clk_ofdata_to_platdata(struct udevice *dev) 772 { 773 #if !CONFIG_IS_ENABLED(OF_PLATDATA) 774 struct rk3288_clk_priv *priv = dev_get_priv(dev); 775 776 priv->cru = (struct rk3288_cru *)devfdt_get_addr(dev); 777 #endif 778 779 return 0; 780 } 781 782 static int rk3288_clk_probe(struct udevice *dev) 783 { 784 struct rk3288_clk_priv *priv = dev_get_priv(dev); 785 bool init_clocks = false; 786 787 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 788 if (IS_ERR(priv->grf)) 789 return PTR_ERR(priv->grf); 790 #ifdef CONFIG_SPL_BUILD 791 #if CONFIG_IS_ENABLED(OF_PLATDATA) 792 struct rk3288_clk_plat *plat = dev_get_platdata(dev); 793 794 priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]); 795 #endif 796 init_clocks = true; 797 #endif 798 if (!(gd->flags & GD_FLG_RELOC)) { 799 u32 reg; 800 801 /* 802 * Init clocks in U-Boot proper if the NPLL is runnning. This 803 * indicates that a previous boot loader set up the clocks, so 804 * we need to redo it. U-Boot's SPL does not set this clock. 805 */ 806 reg = readl(&priv->cru->cru_mode_con); 807 if (((reg & NPLL_MODE_MASK) >> NPLL_MODE_SHIFT) == 808 NPLL_MODE_NORMAL) 809 init_clocks = true; 810 } 811 812 if (init_clocks) 813 rkclk_init(priv->cru, priv->grf); 814 815 return 0; 816 } 817 818 static int rk3288_clk_bind(struct udevice *dev) 819 { 820 int ret; 821 822 /* The reset driver does not have a device node, so bind it here */ 823 ret = device_bind_driver(gd->dm_root, "rk3288_sysreset", "reset", &dev); 824 if (ret) 825 debug("Warning: No RK3288 reset driver: ret=%d\n", ret); 826 827 return 0; 828 } 829 830 static const struct udevice_id rk3288_clk_ids[] = { 831 { .compatible = "rockchip,rk3288-cru" }, 832 { } 833 }; 834 835 U_BOOT_DRIVER(rockchip_rk3288_cru) = { 836 .name = "rockchip_rk3288_cru", 837 .id = UCLASS_CLK, 838 .of_match = rk3288_clk_ids, 839 .priv_auto_alloc_size = sizeof(struct rk3288_clk_priv), 840 .platdata_auto_alloc_size = sizeof(struct rk3288_clk_plat), 841 .ops = &rk3288_clk_ops, 842 .bind = rk3288_clk_bind, 843 .ofdata_to_platdata = rk3288_clk_ofdata_to_platdata, 844 .probe = rk3288_clk_probe, 845 }; 846