1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2017 NXP 4 * 5 * Peng Fan <peng.fan@nxp.com> 6 */ 7 8 #include <common.h> 9 #include <asm/arch/clock.h> 10 #include <asm/arch/imx-regs.h> 11 #include <asm/io.h> 12 #include <asm/arch/sys_proto.h> 13 #include <errno.h> 14 #include <linux/iopoll.h> 15 16 static struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR; 17 18 static u32 decode_frac_pll(enum clk_root_src frac_pll) 19 { 20 u32 pll_cfg0, pll_cfg1, pllout; 21 u32 pll_refclk_sel, pll_refclk; 22 u32 divr_val, divq_val, divf_val, divff, divfi; 23 u32 pllout_div_shift, pllout_div_mask, pllout_div; 24 25 switch (frac_pll) { 26 case ARM_PLL_CLK: 27 pll_cfg0 = readl(&ana_pll->arm_pll_cfg0); 28 pll_cfg1 = readl(&ana_pll->arm_pll_cfg1); 29 pllout_div_shift = HW_FRAC_ARM_PLL_DIV_SHIFT; 30 pllout_div_mask = HW_FRAC_ARM_PLL_DIV_MASK; 31 break; 32 default: 33 printf("Frac PLL %d not supporte\n", frac_pll); 34 return 0; 35 } 36 37 pllout_div = readl(&ana_pll->frac_pllout_div_cfg); 38 pllout_div = (pllout_div & pllout_div_mask) >> pllout_div_shift; 39 40 /* Power down */ 41 if (pll_cfg0 & FRAC_PLL_PD_MASK) 42 return 0; 43 44 /* output not enabled */ 45 if ((pll_cfg0 & FRAC_PLL_CLKE_MASK) == 0) 46 return 0; 47 48 pll_refclk_sel = pll_cfg0 & FRAC_PLL_REFCLK_SEL_MASK; 49 50 if (pll_refclk_sel == FRAC_PLL_REFCLK_SEL_OSC_25M) 51 pll_refclk = 25000000u; 52 else if (pll_refclk_sel == FRAC_PLL_REFCLK_SEL_OSC_27M) 53 pll_refclk = 27000000u; 54 else if (pll_refclk_sel == FRAC_PLL_REFCLK_SEL_HDMI_PHY_27M) 55 pll_refclk = 27000000u; 56 else 57 pll_refclk = 0; 58 59 if (pll_cfg0 & FRAC_PLL_BYPASS_MASK) 60 return pll_refclk; 61 62 divr_val = (pll_cfg0 & FRAC_PLL_REFCLK_DIV_VAL_MASK) >> 63 FRAC_PLL_REFCLK_DIV_VAL_SHIFT; 64 divq_val = pll_cfg0 & FRAC_PLL_OUTPUT_DIV_VAL_MASK; 65 66 divff = (pll_cfg1 & FRAC_PLL_FRAC_DIV_CTL_MASK) >> 67 FRAC_PLL_FRAC_DIV_CTL_SHIFT; 68 divfi = pll_cfg1 & FRAC_PLL_INT_DIV_CTL_MASK; 69 70 divf_val = 1 + divfi + divff / (1 << 24); 71 72 pllout = pll_refclk / (divr_val + 1) * 8 * divf_val / 73 ((divq_val + 1) * 2); 74 75 return pllout / (pllout_div + 1); 76 } 77 78 static u32 decode_sscg_pll(enum clk_root_src sscg_pll) 79 { 80 u32 pll_cfg0, pll_cfg1, pll_cfg2; 81 u32 pll_refclk_sel, pll_refclk; 82 u32 divr1, divr2, divf1, divf2, divq, div; 83 u32 sse; 84 u32 pll_clke; 85 u32 pllout_div_shift, pllout_div_mask, pllout_div; 86 u32 pllout; 87 88 switch (sscg_pll) { 89 case SYSTEM_PLL1_800M_CLK: 90 case SYSTEM_PLL1_400M_CLK: 91 case SYSTEM_PLL1_266M_CLK: 92 case SYSTEM_PLL1_200M_CLK: 93 case SYSTEM_PLL1_160M_CLK: 94 case SYSTEM_PLL1_133M_CLK: 95 case SYSTEM_PLL1_100M_CLK: 96 case SYSTEM_PLL1_80M_CLK: 97 case SYSTEM_PLL1_40M_CLK: 98 pll_cfg0 = readl(&ana_pll->sys_pll1_cfg0); 99 pll_cfg1 = readl(&ana_pll->sys_pll1_cfg1); 100 pll_cfg2 = readl(&ana_pll->sys_pll1_cfg2); 101 pllout_div_shift = HW_SSCG_SYSTEM_PLL1_DIV_SHIFT; 102 pllout_div_mask = HW_SSCG_SYSTEM_PLL1_DIV_MASK; 103 break; 104 case SYSTEM_PLL2_1000M_CLK: 105 case SYSTEM_PLL2_500M_CLK: 106 case SYSTEM_PLL2_333M_CLK: 107 case SYSTEM_PLL2_250M_CLK: 108 case SYSTEM_PLL2_200M_CLK: 109 case SYSTEM_PLL2_166M_CLK: 110 case SYSTEM_PLL2_125M_CLK: 111 case SYSTEM_PLL2_100M_CLK: 112 case SYSTEM_PLL2_50M_CLK: 113 pll_cfg0 = readl(&ana_pll->sys_pll2_cfg0); 114 pll_cfg1 = readl(&ana_pll->sys_pll2_cfg1); 115 pll_cfg2 = readl(&ana_pll->sys_pll2_cfg2); 116 pllout_div_shift = HW_SSCG_SYSTEM_PLL2_DIV_SHIFT; 117 pllout_div_mask = HW_SSCG_SYSTEM_PLL2_DIV_MASK; 118 break; 119 case SYSTEM_PLL3_CLK: 120 pll_cfg0 = readl(&ana_pll->sys_pll3_cfg0); 121 pll_cfg1 = readl(&ana_pll->sys_pll3_cfg1); 122 pll_cfg2 = readl(&ana_pll->sys_pll3_cfg2); 123 pllout_div_shift = HW_SSCG_SYSTEM_PLL3_DIV_SHIFT; 124 pllout_div_mask = HW_SSCG_SYSTEM_PLL3_DIV_MASK; 125 break; 126 case DRAM_PLL1_CLK: 127 pll_cfg0 = readl(&ana_pll->dram_pll_cfg0); 128 pll_cfg1 = readl(&ana_pll->dram_pll_cfg1); 129 pll_cfg2 = readl(&ana_pll->dram_pll_cfg2); 130 pllout_div_shift = HW_SSCG_DRAM_PLL_DIV_SHIFT; 131 pllout_div_mask = HW_SSCG_DRAM_PLL_DIV_MASK; 132 break; 133 default: 134 printf("sscg pll %d not supporte\n", sscg_pll); 135 return 0; 136 } 137 138 switch (sscg_pll) { 139 case DRAM_PLL1_CLK: 140 pll_clke = SSCG_PLL_DRAM_PLL_CLKE_MASK; 141 div = 1; 142 break; 143 case SYSTEM_PLL3_CLK: 144 pll_clke = SSCG_PLL_PLL3_CLKE_MASK; 145 div = 1; 146 break; 147 case SYSTEM_PLL2_1000M_CLK: 148 case SYSTEM_PLL1_800M_CLK: 149 pll_clke = SSCG_PLL_CLKE_MASK; 150 div = 1; 151 break; 152 case SYSTEM_PLL2_500M_CLK: 153 case SYSTEM_PLL1_400M_CLK: 154 pll_clke = SSCG_PLL_DIV2_CLKE_MASK; 155 div = 2; 156 break; 157 case SYSTEM_PLL2_333M_CLK: 158 case SYSTEM_PLL1_266M_CLK: 159 pll_clke = SSCG_PLL_DIV3_CLKE_MASK; 160 div = 3; 161 break; 162 case SYSTEM_PLL2_250M_CLK: 163 case SYSTEM_PLL1_200M_CLK: 164 pll_clke = SSCG_PLL_DIV4_CLKE_MASK; 165 div = 4; 166 break; 167 case SYSTEM_PLL2_200M_CLK: 168 case SYSTEM_PLL1_160M_CLK: 169 pll_clke = SSCG_PLL_DIV5_CLKE_MASK; 170 div = 5; 171 break; 172 case SYSTEM_PLL2_166M_CLK: 173 case SYSTEM_PLL1_133M_CLK: 174 pll_clke = SSCG_PLL_DIV6_CLKE_MASK; 175 div = 6; 176 break; 177 case SYSTEM_PLL2_125M_CLK: 178 case SYSTEM_PLL1_100M_CLK: 179 pll_clke = SSCG_PLL_DIV8_CLKE_MASK; 180 div = 8; 181 break; 182 case SYSTEM_PLL2_100M_CLK: 183 case SYSTEM_PLL1_80M_CLK: 184 pll_clke = SSCG_PLL_DIV10_CLKE_MASK; 185 div = 10; 186 break; 187 case SYSTEM_PLL2_50M_CLK: 188 case SYSTEM_PLL1_40M_CLK: 189 pll_clke = SSCG_PLL_DIV20_CLKE_MASK; 190 div = 20; 191 break; 192 default: 193 printf("sscg pll %d not supporte\n", sscg_pll); 194 return 0; 195 } 196 197 /* Power down */ 198 if (pll_cfg0 & SSCG_PLL_PD_MASK) 199 return 0; 200 201 /* output not enabled */ 202 if ((pll_cfg0 & pll_clke) == 0) 203 return 0; 204 205 pllout_div = readl(&ana_pll->sscg_pllout_div_cfg); 206 pllout_div = (pllout_div & pllout_div_mask) >> pllout_div_shift; 207 208 pll_refclk_sel = pll_cfg0 & SSCG_PLL_REFCLK_SEL_MASK; 209 210 if (pll_refclk_sel == SSCG_PLL_REFCLK_SEL_OSC_25M) 211 pll_refclk = 25000000u; 212 else if (pll_refclk_sel == SSCG_PLL_REFCLK_SEL_OSC_27M) 213 pll_refclk = 27000000u; 214 else if (pll_refclk_sel == SSCG_PLL_REFCLK_SEL_HDMI_PHY_27M) 215 pll_refclk = 27000000u; 216 else 217 pll_refclk = 0; 218 219 /* We assume bypass1/2 are the same value */ 220 if ((pll_cfg0 & SSCG_PLL_BYPASS1_MASK) || 221 (pll_cfg0 & SSCG_PLL_BYPASS2_MASK)) 222 return pll_refclk; 223 224 divr1 = (pll_cfg2 & SSCG_PLL_REF_DIVR1_MASK) >> 225 SSCG_PLL_REF_DIVR1_SHIFT; 226 divr2 = (pll_cfg2 & SSCG_PLL_REF_DIVR2_MASK) >> 227 SSCG_PLL_REF_DIVR2_SHIFT; 228 divf1 = (pll_cfg2 & SSCG_PLL_FEEDBACK_DIV_F1_MASK) >> 229 SSCG_PLL_FEEDBACK_DIV_F1_SHIFT; 230 divf2 = (pll_cfg2 & SSCG_PLL_FEEDBACK_DIV_F2_MASK) >> 231 SSCG_PLL_FEEDBACK_DIV_F2_SHIFT; 232 divq = (pll_cfg2 & SSCG_PLL_OUTPUT_DIV_VAL_MASK) >> 233 SSCG_PLL_OUTPUT_DIV_VAL_SHIFT; 234 sse = pll_cfg1 & SSCG_PLL_SSE_MASK; 235 236 if (sse) 237 sse = 8; 238 else 239 sse = 2; 240 241 pllout = pll_refclk / (divr1 + 1) * sse * (divf1 + 1) / 242 (divr2 + 1) * (divf2 + 1) / (divq + 1); 243 244 return pllout / (pllout_div + 1) / div; 245 } 246 247 static u32 get_root_src_clk(enum clk_root_src root_src) 248 { 249 switch (root_src) { 250 case OSC_25M_CLK: 251 return 25000000; 252 case OSC_27M_CLK: 253 return 27000000; 254 case OSC_32K_CLK: 255 return 32768; 256 case ARM_PLL_CLK: 257 return decode_frac_pll(root_src); 258 case SYSTEM_PLL1_800M_CLK: 259 case SYSTEM_PLL1_400M_CLK: 260 case SYSTEM_PLL1_266M_CLK: 261 case SYSTEM_PLL1_200M_CLK: 262 case SYSTEM_PLL1_160M_CLK: 263 case SYSTEM_PLL1_133M_CLK: 264 case SYSTEM_PLL1_100M_CLK: 265 case SYSTEM_PLL1_80M_CLK: 266 case SYSTEM_PLL1_40M_CLK: 267 case SYSTEM_PLL2_1000M_CLK: 268 case SYSTEM_PLL2_500M_CLK: 269 case SYSTEM_PLL2_333M_CLK: 270 case SYSTEM_PLL2_250M_CLK: 271 case SYSTEM_PLL2_200M_CLK: 272 case SYSTEM_PLL2_166M_CLK: 273 case SYSTEM_PLL2_125M_CLK: 274 case SYSTEM_PLL2_100M_CLK: 275 case SYSTEM_PLL2_50M_CLK: 276 case SYSTEM_PLL3_CLK: 277 return decode_sscg_pll(root_src); 278 default: 279 return 0; 280 } 281 282 return 0; 283 } 284 285 static u32 get_root_clk(enum clk_root_index clock_id) 286 { 287 enum clk_root_src root_src; 288 u32 post_podf, pre_podf, root_src_clk; 289 290 if (clock_root_enabled(clock_id) <= 0) 291 return 0; 292 293 if (clock_get_prediv(clock_id, &pre_podf) < 0) 294 return 0; 295 296 if (clock_get_postdiv(clock_id, &post_podf) < 0) 297 return 0; 298 299 if (clock_get_src(clock_id, &root_src) < 0) 300 return 0; 301 302 root_src_clk = get_root_src_clk(root_src); 303 304 return root_src_clk / (post_podf + 1) / (pre_podf + 1); 305 } 306 307 #ifdef CONFIG_MXC_OCOTP 308 void enable_ocotp_clk(unsigned char enable) 309 { 310 clock_enable(CCGR_OCOTP, !!enable); 311 } 312 #endif 313 314 int enable_i2c_clk(unsigned char enable, unsigned int i2c_num) 315 { 316 /* 0 - 3 is valid i2c num */ 317 if (i2c_num > 3) 318 return -EINVAL; 319 320 clock_enable(CCGR_I2C1 + i2c_num, !!enable); 321 322 return 0; 323 } 324 325 unsigned int mxc_get_clock(enum clk_root_index clk) 326 { 327 u32 val; 328 329 if (clk >= CLK_ROOT_MAX) 330 return 0; 331 332 if (clk == MXC_ARM_CLK) 333 return get_root_clk(ARM_A53_CLK_ROOT); 334 335 if (clk == MXC_IPG_CLK) { 336 clock_get_target_val(IPG_CLK_ROOT, &val); 337 val = val & 0x3; 338 return get_root_clk(AHB_CLK_ROOT) / (val + 1); 339 } 340 341 return get_root_clk(clk); 342 } 343 344 u32 imx_get_uartclk(void) 345 { 346 return mxc_get_clock(UART1_CLK_ROOT); 347 } 348 349 void mxs_set_lcdclk(u32 base_addr, u32 freq) 350 { 351 /* 352 * LCDIF_PIXEL_CLK: select 800MHz root clock, 353 * select pre divider 8, output is 100 MHz 354 */ 355 clock_set_target_val(LCDIF_PIXEL_CLK_ROOT, CLK_ROOT_ON | 356 CLK_ROOT_SOURCE_SEL(4) | 357 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV8)); 358 } 359 360 void init_wdog_clk(void) 361 { 362 clock_enable(CCGR_WDOG1, 0); 363 clock_enable(CCGR_WDOG2, 0); 364 clock_enable(CCGR_WDOG3, 0); 365 clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON | 366 CLK_ROOT_SOURCE_SEL(0)); 367 clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON | 368 CLK_ROOT_SOURCE_SEL(0)); 369 clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON | 370 CLK_ROOT_SOURCE_SEL(0)); 371 clock_enable(CCGR_WDOG1, 1); 372 clock_enable(CCGR_WDOG2, 1); 373 clock_enable(CCGR_WDOG3, 1); 374 } 375 376 void init_usb_clk(void) 377 { 378 if (!is_usb_boot()) { 379 clock_enable(CCGR_USB_CTRL1, 0); 380 clock_enable(CCGR_USB_CTRL2, 0); 381 clock_enable(CCGR_USB_PHY1, 0); 382 clock_enable(CCGR_USB_PHY2, 0); 383 /* 500MHz */ 384 clock_set_target_val(USB_BUS_CLK_ROOT, CLK_ROOT_ON | 385 CLK_ROOT_SOURCE_SEL(1)); 386 /* 100MHz */ 387 clock_set_target_val(USB_CORE_REF_CLK_ROOT, CLK_ROOT_ON | 388 CLK_ROOT_SOURCE_SEL(1)); 389 /* 100MHz */ 390 clock_set_target_val(USB_PHY_REF_CLK_ROOT, CLK_ROOT_ON | 391 CLK_ROOT_SOURCE_SEL(1)); 392 clock_enable(CCGR_USB_CTRL1, 1); 393 clock_enable(CCGR_USB_CTRL2, 1); 394 clock_enable(CCGR_USB_PHY1, 1); 395 clock_enable(CCGR_USB_PHY2, 1); 396 } 397 } 398 399 void init_uart_clk(u32 index) 400 { 401 /* Set uart clock root 25M OSC */ 402 switch (index) { 403 case 0: 404 clock_enable(CCGR_UART1, 0); 405 clock_set_target_val(UART1_CLK_ROOT, CLK_ROOT_ON | 406 CLK_ROOT_SOURCE_SEL(0)); 407 clock_enable(CCGR_UART1, 1); 408 return; 409 case 1: 410 clock_enable(CCGR_UART2, 0); 411 clock_set_target_val(UART2_CLK_ROOT, CLK_ROOT_ON | 412 CLK_ROOT_SOURCE_SEL(0)); 413 clock_enable(CCGR_UART2, 1); 414 return; 415 case 2: 416 clock_enable(CCGR_UART3, 0); 417 clock_set_target_val(UART3_CLK_ROOT, CLK_ROOT_ON | 418 CLK_ROOT_SOURCE_SEL(0)); 419 clock_enable(CCGR_UART3, 1); 420 return; 421 case 3: 422 clock_enable(CCGR_UART4, 0); 423 clock_set_target_val(UART4_CLK_ROOT, CLK_ROOT_ON | 424 CLK_ROOT_SOURCE_SEL(0)); 425 clock_enable(CCGR_UART4, 1); 426 return; 427 default: 428 printf("Invalid uart index\n"); 429 return; 430 } 431 } 432 433 void init_clk_usdhc(u32 index) 434 { 435 /* 436 * set usdhc clock root 437 * sys pll1 400M 438 */ 439 switch (index) { 440 case 0: 441 clock_enable(CCGR_USDHC1, 0); 442 clock_set_target_val(USDHC1_CLK_ROOT, CLK_ROOT_ON | 443 CLK_ROOT_SOURCE_SEL(1) | 444 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2)); 445 clock_enable(CCGR_USDHC1, 1); 446 return; 447 case 1: 448 clock_enable(CCGR_USDHC2, 0); 449 clock_set_target_val(USDHC2_CLK_ROOT, CLK_ROOT_ON | 450 CLK_ROOT_SOURCE_SEL(1) | 451 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2)); 452 clock_enable(CCGR_USDHC2, 1); 453 return; 454 default: 455 printf("Invalid usdhc index\n"); 456 return; 457 } 458 } 459 460 int set_clk_qspi(void) 461 { 462 /* 463 * set qspi root 464 * sys pll1 100M 465 */ 466 clock_enable(CCGR_QSPI, 0); 467 clock_set_target_val(QSPI_CLK_ROOT, CLK_ROOT_ON | 468 CLK_ROOT_SOURCE_SEL(7)); 469 clock_enable(CCGR_QSPI, 1); 470 471 return 0; 472 } 473 474 #ifdef CONFIG_FEC_MXC 475 int set_clk_enet(enum enet_freq type) 476 { 477 u32 target; 478 u32 enet1_ref; 479 480 switch (type) { 481 case ENET_125MHZ: 482 enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_125M_CLK; 483 break; 484 case ENET_50MHZ: 485 enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_50M_CLK; 486 break; 487 case ENET_25MHZ: 488 enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_25M_CLK; 489 break; 490 default: 491 return -EINVAL; 492 } 493 494 /* disable the clock first */ 495 clock_enable(CCGR_ENET1, 0); 496 clock_enable(CCGR_SIM_ENET, 0); 497 498 /* set enet axi clock 266Mhz */ 499 target = CLK_ROOT_ON | ENET_AXI_CLK_ROOT_FROM_SYS1_PLL_266M | 500 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) | 501 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1); 502 clock_set_target_val(ENET_AXI_CLK_ROOT, target); 503 504 target = CLK_ROOT_ON | enet1_ref | 505 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) | 506 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1); 507 clock_set_target_val(ENET_REF_CLK_ROOT, target); 508 509 target = CLK_ROOT_ON | 510 ENET1_TIME_CLK_ROOT_FROM_PLL_ENET_MAIN_100M_CLK | 511 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) | 512 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV4); 513 clock_set_target_val(ENET_TIMER_CLK_ROOT, target); 514 515 /* enable clock */ 516 clock_enable(CCGR_SIM_ENET, 1); 517 clock_enable(CCGR_ENET1, 1); 518 519 return 0; 520 } 521 #endif 522 523 u32 imx_get_fecclk(void) 524 { 525 return get_root_clk(ENET_AXI_CLK_ROOT); 526 } 527 528 static struct dram_bypass_clk_setting imx8mq_dram_bypass_tbl[] = { 529 DRAM_BYPASS_ROOT_CONFIG(MHZ(100), 2, CLK_ROOT_PRE_DIV1, 2, 530 CLK_ROOT_PRE_DIV2), 531 DRAM_BYPASS_ROOT_CONFIG(MHZ(250), 3, CLK_ROOT_PRE_DIV2, 2, 532 CLK_ROOT_PRE_DIV2), 533 DRAM_BYPASS_ROOT_CONFIG(MHZ(400), 1, CLK_ROOT_PRE_DIV2, 3, 534 CLK_ROOT_PRE_DIV2), 535 }; 536 537 void dram_enable_bypass(ulong clk_val) 538 { 539 int i; 540 struct dram_bypass_clk_setting *config; 541 542 for (i = 0; i < ARRAY_SIZE(imx8mq_dram_bypass_tbl); i++) { 543 if (clk_val == imx8mq_dram_bypass_tbl[i].clk) 544 break; 545 } 546 547 if (i == ARRAY_SIZE(imx8mq_dram_bypass_tbl)) { 548 printf("No matched freq table %lu\n", clk_val); 549 return; 550 } 551 552 config = &imx8mq_dram_bypass_tbl[i]; 553 554 clock_set_target_val(DRAM_ALT_CLK_ROOT, CLK_ROOT_ON | 555 CLK_ROOT_SOURCE_SEL(config->alt_root_sel) | 556 CLK_ROOT_PRE_DIV(config->alt_pre_div)); 557 clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON | 558 CLK_ROOT_SOURCE_SEL(config->apb_root_sel) | 559 CLK_ROOT_PRE_DIV(config->apb_pre_div)); 560 clock_set_target_val(DRAM_SEL_CFG, CLK_ROOT_ON | 561 CLK_ROOT_SOURCE_SEL(1)); 562 } 563 564 void dram_disable_bypass(void) 565 { 566 clock_set_target_val(DRAM_SEL_CFG, CLK_ROOT_ON | 567 CLK_ROOT_SOURCE_SEL(0)); 568 clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON | 569 CLK_ROOT_SOURCE_SEL(4) | 570 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV5)); 571 } 572 573 #ifdef CONFIG_SPL_BUILD 574 void dram_pll_init(ulong pll_val) 575 { 576 u32 val; 577 void __iomem *pll_control_reg = &ana_pll->dram_pll_cfg0; 578 void __iomem *pll_cfg_reg2 = &ana_pll->dram_pll_cfg2; 579 580 /* Bypass */ 581 setbits_le32(pll_control_reg, SSCG_PLL_BYPASS1_MASK); 582 setbits_le32(pll_control_reg, SSCG_PLL_BYPASS2_MASK); 583 584 switch (pll_val) { 585 case MHZ(800): 586 val = readl(pll_cfg_reg2); 587 val &= ~(SSCG_PLL_OUTPUT_DIV_VAL_MASK | 588 SSCG_PLL_FEEDBACK_DIV_F2_MASK | 589 SSCG_PLL_FEEDBACK_DIV_F1_MASK | 590 SSCG_PLL_REF_DIVR2_MASK); 591 val |= SSCG_PLL_OUTPUT_DIV_VAL(0); 592 val |= SSCG_PLL_FEEDBACK_DIV_F2_VAL(11); 593 val |= SSCG_PLL_FEEDBACK_DIV_F1_VAL(39); 594 val |= SSCG_PLL_REF_DIVR2_VAL(29); 595 writel(val, pll_cfg_reg2); 596 break; 597 case MHZ(600): 598 val = readl(pll_cfg_reg2); 599 val &= ~(SSCG_PLL_OUTPUT_DIV_VAL_MASK | 600 SSCG_PLL_FEEDBACK_DIV_F2_MASK | 601 SSCG_PLL_FEEDBACK_DIV_F1_MASK | 602 SSCG_PLL_REF_DIVR2_MASK); 603 val |= SSCG_PLL_OUTPUT_DIV_VAL(1); 604 val |= SSCG_PLL_FEEDBACK_DIV_F2_VAL(17); 605 val |= SSCG_PLL_FEEDBACK_DIV_F1_VAL(39); 606 val |= SSCG_PLL_REF_DIVR2_VAL(29); 607 writel(val, pll_cfg_reg2); 608 break; 609 case MHZ(400): 610 val = readl(pll_cfg_reg2); 611 val &= ~(SSCG_PLL_OUTPUT_DIV_VAL_MASK | 612 SSCG_PLL_FEEDBACK_DIV_F2_MASK | 613 SSCG_PLL_FEEDBACK_DIV_F1_MASK | 614 SSCG_PLL_REF_DIVR2_MASK); 615 val |= SSCG_PLL_OUTPUT_DIV_VAL(1); 616 val |= SSCG_PLL_FEEDBACK_DIV_F2_VAL(11); 617 val |= SSCG_PLL_FEEDBACK_DIV_F1_VAL(39); 618 val |= SSCG_PLL_REF_DIVR2_VAL(29); 619 writel(val, pll_cfg_reg2); 620 break; 621 case MHZ(167): 622 val = readl(pll_cfg_reg2); 623 val &= ~(SSCG_PLL_OUTPUT_DIV_VAL_MASK | 624 SSCG_PLL_FEEDBACK_DIV_F2_MASK | 625 SSCG_PLL_FEEDBACK_DIV_F1_MASK | 626 SSCG_PLL_REF_DIVR2_MASK); 627 val |= SSCG_PLL_OUTPUT_DIV_VAL(3); 628 val |= SSCG_PLL_FEEDBACK_DIV_F2_VAL(8); 629 val |= SSCG_PLL_FEEDBACK_DIV_F1_VAL(45); 630 val |= SSCG_PLL_REF_DIVR2_VAL(30); 631 writel(val, pll_cfg_reg2); 632 break; 633 default: 634 break; 635 } 636 637 /* Clear power down bit */ 638 clrbits_le32(pll_control_reg, SSCG_PLL_PD_MASK); 639 /* Eanble ARM_PLL/SYS_PLL */ 640 setbits_le32(pll_control_reg, SSCG_PLL_DRAM_PLL_CLKE_MASK); 641 642 /* Clear bypass */ 643 clrbits_le32(pll_control_reg, SSCG_PLL_BYPASS1_MASK); 644 __udelay(100); 645 clrbits_le32(pll_control_reg, SSCG_PLL_BYPASS2_MASK); 646 /* Wait lock */ 647 while (!(readl(pll_control_reg) & SSCG_PLL_LOCK_MASK)) 648 ; 649 } 650 651 int frac_pll_init(u32 pll, enum frac_pll_out_val val) 652 { 653 void __iomem *pll_cfg0, __iomem *pll_cfg1; 654 u32 val_cfg0, val_cfg1; 655 int ret; 656 657 switch (pll) { 658 case ANATOP_ARM_PLL: 659 pll_cfg0 = &ana_pll->arm_pll_cfg0; 660 pll_cfg1 = &ana_pll->arm_pll_cfg1; 661 662 if (val == FRAC_PLL_OUT_1000M) 663 val_cfg1 = FRAC_PLL_INT_DIV_CTL_VAL(49); 664 else 665 val_cfg1 = FRAC_PLL_INT_DIV_CTL_VAL(79); 666 val_cfg0 = FRAC_PLL_CLKE_MASK | FRAC_PLL_REFCLK_SEL_OSC_25M | 667 FRAC_PLL_LOCK_SEL_MASK | FRAC_PLL_NEWDIV_VAL_MASK | 668 FRAC_PLL_REFCLK_DIV_VAL(4) | 669 FRAC_PLL_OUTPUT_DIV_VAL(0); 670 break; 671 default: 672 return -EINVAL; 673 } 674 675 /* bypass the clock */ 676 setbits_le32(pll_cfg0, FRAC_PLL_BYPASS_MASK); 677 /* Set the value */ 678 writel(val_cfg1, pll_cfg1); 679 writel(val_cfg0 | FRAC_PLL_BYPASS_MASK, pll_cfg0); 680 val_cfg0 = readl(pll_cfg0); 681 /* unbypass the clock */ 682 clrbits_le32(pll_cfg0, FRAC_PLL_BYPASS_MASK); 683 ret = readl_poll_timeout(pll_cfg0, val_cfg0, 684 val_cfg0 & FRAC_PLL_LOCK_MASK, 1); 685 if (ret) 686 printf("%s timeout\n", __func__); 687 clrbits_le32(pll_cfg0, FRAC_PLL_NEWDIV_VAL_MASK); 688 689 return 0; 690 } 691 692 int sscg_pll_init(u32 pll) 693 { 694 void __iomem *pll_cfg0, __iomem *pll_cfg1, __iomem *pll_cfg2; 695 u32 val_cfg0, val_cfg1, val_cfg2, val; 696 u32 bypass1_mask = 0x20, bypass2_mask = 0x10; 697 int ret; 698 699 switch (pll) { 700 case ANATOP_SYSTEM_PLL1: 701 pll_cfg0 = &ana_pll->sys_pll1_cfg0; 702 pll_cfg1 = &ana_pll->sys_pll1_cfg1; 703 pll_cfg2 = &ana_pll->sys_pll1_cfg2; 704 /* 800MHz */ 705 val_cfg2 = SSCG_PLL_FEEDBACK_DIV_F1_VAL(3) | 706 SSCG_PLL_FEEDBACK_DIV_F2_VAL(3); 707 val_cfg1 = 0; 708 val_cfg0 = SSCG_PLL_CLKE_MASK | SSCG_PLL_DIV2_CLKE_MASK | 709 SSCG_PLL_DIV3_CLKE_MASK | SSCG_PLL_DIV4_CLKE_MASK | 710 SSCG_PLL_DIV5_CLKE_MASK | SSCG_PLL_DIV6_CLKE_MASK | 711 SSCG_PLL_DIV8_CLKE_MASK | SSCG_PLL_DIV10_CLKE_MASK | 712 SSCG_PLL_DIV20_CLKE_MASK | SSCG_PLL_LOCK_SEL_MASK | 713 SSCG_PLL_REFCLK_SEL_OSC_25M; 714 break; 715 case ANATOP_SYSTEM_PLL2: 716 pll_cfg0 = &ana_pll->sys_pll2_cfg0; 717 pll_cfg1 = &ana_pll->sys_pll2_cfg1; 718 pll_cfg2 = &ana_pll->sys_pll2_cfg2; 719 /* 1000MHz */ 720 val_cfg2 = SSCG_PLL_FEEDBACK_DIV_F1_VAL(3) | 721 SSCG_PLL_FEEDBACK_DIV_F2_VAL(4); 722 val_cfg1 = 0; 723 val_cfg0 = SSCG_PLL_CLKE_MASK | SSCG_PLL_DIV2_CLKE_MASK | 724 SSCG_PLL_DIV3_CLKE_MASK | SSCG_PLL_DIV4_CLKE_MASK | 725 SSCG_PLL_DIV5_CLKE_MASK | SSCG_PLL_DIV6_CLKE_MASK | 726 SSCG_PLL_DIV8_CLKE_MASK | SSCG_PLL_DIV10_CLKE_MASK | 727 SSCG_PLL_DIV20_CLKE_MASK | SSCG_PLL_LOCK_SEL_MASK | 728 SSCG_PLL_REFCLK_SEL_OSC_25M; 729 break; 730 case ANATOP_SYSTEM_PLL3: 731 pll_cfg0 = &ana_pll->sys_pll3_cfg0; 732 pll_cfg1 = &ana_pll->sys_pll3_cfg1; 733 pll_cfg2 = &ana_pll->sys_pll3_cfg2; 734 /* 800MHz */ 735 val_cfg2 = SSCG_PLL_FEEDBACK_DIV_F1_VAL(3) | 736 SSCG_PLL_FEEDBACK_DIV_F2_VAL(3); 737 val_cfg1 = 0; 738 val_cfg0 = SSCG_PLL_PLL3_CLKE_MASK | SSCG_PLL_LOCK_SEL_MASK | 739 SSCG_PLL_REFCLK_SEL_OSC_25M; 740 break; 741 default: 742 return -EINVAL; 743 } 744 745 /*bypass*/ 746 setbits_le32(pll_cfg0, bypass1_mask | bypass2_mask); 747 /* set value */ 748 writel(val_cfg2, pll_cfg2); 749 writel(val_cfg1, pll_cfg1); 750 /*unbypass1 and wait 70us */ 751 writel(val_cfg0 | bypass2_mask, pll_cfg1); 752 753 __udelay(70); 754 755 /* unbypass2 and wait lock */ 756 writel(val_cfg0, pll_cfg1); 757 ret = readl_poll_timeout(pll_cfg0, val, val & SSCG_PLL_LOCK_MASK, 1); 758 if (ret) 759 printf("%s timeout\n", __func__); 760 761 return ret; 762 } 763 764 int clock_init(void) 765 { 766 u32 grade; 767 768 clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON | 769 CLK_ROOT_SOURCE_SEL(0)); 770 771 /* 772 * 8MQ only supports two grades: consumer and industrial. 773 * We set ARM clock to 1Ghz for consumer, 800Mhz for industrial 774 */ 775 grade = get_cpu_temp_grade(NULL, NULL); 776 if (!grade) { 777 frac_pll_init(ANATOP_ARM_PLL, FRAC_PLL_OUT_1000M); 778 clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON | 779 CLK_ROOT_SOURCE_SEL(1) | 780 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1)); 781 } else { 782 frac_pll_init(ANATOP_ARM_PLL, FRAC_PLL_OUT_1600M); 783 clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON | 784 CLK_ROOT_SOURCE_SEL(1) | 785 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2)); 786 } 787 /* 788 * According to ANAMIX SPEC 789 * sys pll1 fixed at 800MHz 790 * sys pll2 fixed at 1GHz 791 * Here we only enable the outputs. 792 */ 793 setbits_le32(&ana_pll->sys_pll1_cfg0, SSCG_PLL_CLKE_MASK | 794 SSCG_PLL_DIV2_CLKE_MASK | SSCG_PLL_DIV3_CLKE_MASK | 795 SSCG_PLL_DIV4_CLKE_MASK | SSCG_PLL_DIV5_CLKE_MASK | 796 SSCG_PLL_DIV6_CLKE_MASK | SSCG_PLL_DIV8_CLKE_MASK | 797 SSCG_PLL_DIV10_CLKE_MASK | SSCG_PLL_DIV20_CLKE_MASK); 798 799 setbits_le32(&ana_pll->sys_pll2_cfg0, SSCG_PLL_CLKE_MASK | 800 SSCG_PLL_DIV2_CLKE_MASK | SSCG_PLL_DIV3_CLKE_MASK | 801 SSCG_PLL_DIV4_CLKE_MASK | SSCG_PLL_DIV5_CLKE_MASK | 802 SSCG_PLL_DIV6_CLKE_MASK | SSCG_PLL_DIV8_CLKE_MASK | 803 SSCG_PLL_DIV10_CLKE_MASK | SSCG_PLL_DIV20_CLKE_MASK); 804 805 clock_set_target_val(NAND_USDHC_BUS_CLK_ROOT, CLK_ROOT_ON | 806 CLK_ROOT_SOURCE_SEL(1)); 807 808 init_wdog_clk(); 809 clock_enable(CCGR_TSENSOR, 1); 810 811 return 0; 812 } 813 #endif 814 815 /* 816 * Dump some clockes. 817 */ 818 #ifndef CONFIG_SPL_BUILD 819 int do_imx8m_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, 820 char * const argv[]) 821 { 822 u32 freq; 823 824 freq = decode_frac_pll(ARM_PLL_CLK); 825 printf("ARM_PLL %8d MHz\n", freq / 1000000); 826 freq = decode_sscg_pll(SYSTEM_PLL1_800M_CLK); 827 printf("SYS_PLL1_800 %8d MHz\n", freq / 1000000); 828 freq = decode_sscg_pll(SYSTEM_PLL1_400M_CLK); 829 printf("SYS_PLL1_400 %8d MHz\n", freq / 1000000); 830 freq = decode_sscg_pll(SYSTEM_PLL1_266M_CLK); 831 printf("SYS_PLL1_266 %8d MHz\n", freq / 1000000); 832 freq = decode_sscg_pll(SYSTEM_PLL1_200M_CLK); 833 printf("SYS_PLL1_200 %8d MHz\n", freq / 1000000); 834 freq = decode_sscg_pll(SYSTEM_PLL1_160M_CLK); 835 printf("SYS_PLL1_160 %8d MHz\n", freq / 1000000); 836 freq = decode_sscg_pll(SYSTEM_PLL1_133M_CLK); 837 printf("SYS_PLL1_133 %8d MHz\n", freq / 1000000); 838 freq = decode_sscg_pll(SYSTEM_PLL1_100M_CLK); 839 printf("SYS_PLL1_100 %8d MHz\n", freq / 1000000); 840 freq = decode_sscg_pll(SYSTEM_PLL1_80M_CLK); 841 printf("SYS_PLL1_80 %8d MHz\n", freq / 1000000); 842 freq = decode_sscg_pll(SYSTEM_PLL1_40M_CLK); 843 printf("SYS_PLL1_40 %8d MHz\n", freq / 1000000); 844 freq = decode_sscg_pll(SYSTEM_PLL2_1000M_CLK); 845 printf("SYS_PLL2_1000 %8d MHz\n", freq / 1000000); 846 freq = decode_sscg_pll(SYSTEM_PLL2_500M_CLK); 847 printf("SYS_PLL2_500 %8d MHz\n", freq / 1000000); 848 freq = decode_sscg_pll(SYSTEM_PLL2_333M_CLK); 849 printf("SYS_PLL2_333 %8d MHz\n", freq / 1000000); 850 freq = decode_sscg_pll(SYSTEM_PLL2_250M_CLK); 851 printf("SYS_PLL2_250 %8d MHz\n", freq / 1000000); 852 freq = decode_sscg_pll(SYSTEM_PLL2_200M_CLK); 853 printf("SYS_PLL2_200 %8d MHz\n", freq / 1000000); 854 freq = decode_sscg_pll(SYSTEM_PLL2_166M_CLK); 855 printf("SYS_PLL2_166 %8d MHz\n", freq / 1000000); 856 freq = decode_sscg_pll(SYSTEM_PLL2_125M_CLK); 857 printf("SYS_PLL2_125 %8d MHz\n", freq / 1000000); 858 freq = decode_sscg_pll(SYSTEM_PLL2_100M_CLK); 859 printf("SYS_PLL2_100 %8d MHz\n", freq / 1000000); 860 freq = decode_sscg_pll(SYSTEM_PLL2_50M_CLK); 861 printf("SYS_PLL2_50 %8d MHz\n", freq / 1000000); 862 freq = decode_sscg_pll(SYSTEM_PLL3_CLK); 863 printf("SYS_PLL3 %8d MHz\n", freq / 1000000); 864 freq = mxc_get_clock(UART1_CLK_ROOT); 865 printf("UART1 %8d MHz\n", freq / 1000000); 866 freq = mxc_get_clock(USDHC1_CLK_ROOT); 867 printf("USDHC1 %8d MHz\n", freq / 1000000); 868 freq = mxc_get_clock(QSPI_CLK_ROOT); 869 printf("QSPI %8d MHz\n", freq / 1000000); 870 return 0; 871 } 872 873 U_BOOT_CMD( 874 clocks, CONFIG_SYS_MAXARGS, 1, do_imx8m_showclocks, 875 "display clocks", 876 "" 877 ); 878 #endif 879