1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2008 4 * Texas Instruments, <www.ti.com> 5 * 6 * Author : 7 * Manikandan Pillai <mani.pillai@ti.com> 8 * 9 * Derived from Beagle Board and OMAP3 SDP code by 10 * Richard Woodruff <r-woodruff2@ti.com> 11 * Syed Mohammed Khasim <khasim@ti.com> 12 */ 13 14 #include <common.h> 15 #include <asm/io.h> 16 #include <asm/arch/clock.h> 17 #include <asm/arch/clocks_omap3.h> 18 #include <asm/arch/mem.h> 19 #include <asm/arch/sys_proto.h> 20 #include <environment.h> 21 #include <command.h> 22 23 /****************************************************************************** 24 * get_sys_clk_speed() - determine reference oscillator speed 25 * based on known 32kHz clock and gptimer. 26 *****************************************************************************/ 27 u32 get_osc_clk_speed(void) 28 { 29 u32 start, cstart, cend, cdiff, cdiv, val; 30 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 31 struct prm *prm_base = (struct prm *)PRM_BASE; 32 struct gptimer *gpt1_base = (struct gptimer *)OMAP34XX_GPT1; 33 struct s32ktimer *s32k_base = (struct s32ktimer *)SYNC_32KTIMER_BASE; 34 35 val = readl(&prm_base->clksrc_ctrl); 36 37 if (val & SYSCLKDIV_2) 38 cdiv = 2; 39 else 40 cdiv = 1; 41 42 /* enable timer2 */ 43 val = readl(&prcm_base->clksel_wkup) | CLKSEL_GPT1; 44 45 /* select sys_clk for GPT1 */ 46 writel(val, &prcm_base->clksel_wkup); 47 48 /* Enable I and F Clocks for GPT1 */ 49 val = readl(&prcm_base->iclken_wkup) | EN_GPT1 | EN_32KSYNC; 50 writel(val, &prcm_base->iclken_wkup); 51 52 val = readl(&prcm_base->fclken_wkup) | EN_GPT1; 53 writel(val, &prcm_base->fclken_wkup); 54 55 writel(0, &gpt1_base->tldr); /* start counting at 0 */ 56 writel(GPT_EN, &gpt1_base->tclr); /* enable clock */ 57 58 /* enable 32kHz source, determine sys_clk via gauging */ 59 60 /* start time in 20 cycles */ 61 start = 20 + readl(&s32k_base->s32k_cr); 62 63 /* dead loop till start time */ 64 while (readl(&s32k_base->s32k_cr) < start); 65 66 /* get start sys_clk count */ 67 cstart = readl(&gpt1_base->tcrr); 68 69 /* wait for 40 cycles */ 70 while (readl(&s32k_base->s32k_cr) < (start + 20)) ; 71 cend = readl(&gpt1_base->tcrr); /* get end sys_clk count */ 72 cdiff = cend - cstart; /* get elapsed ticks */ 73 cdiff *= cdiv; 74 75 /* based on number of ticks assign speed */ 76 if (cdiff > 19000) 77 return S38_4M; 78 else if (cdiff > 15200) 79 return S26M; 80 else if (cdiff > 13000) 81 return S24M; 82 else if (cdiff > 9000) 83 return S19_2M; 84 else if (cdiff > 7600) 85 return S13M; 86 else 87 return S12M; 88 } 89 90 /****************************************************************************** 91 * get_sys_clkin_sel() - returns the sys_clkin_sel field value based on 92 * input oscillator clock frequency. 93 *****************************************************************************/ 94 void get_sys_clkin_sel(u32 osc_clk, u32 *sys_clkin_sel) 95 { 96 switch(osc_clk) { 97 case S38_4M: 98 *sys_clkin_sel = 4; 99 break; 100 case S26M: 101 *sys_clkin_sel = 3; 102 break; 103 case S19_2M: 104 *sys_clkin_sel = 2; 105 break; 106 case S13M: 107 *sys_clkin_sel = 1; 108 break; 109 case S12M: 110 default: 111 *sys_clkin_sel = 0; 112 } 113 } 114 115 /* 116 * OMAP34XX/35XX specific functions 117 */ 118 119 static void dpll3_init_34xx(u32 sil_index, u32 clk_index) 120 { 121 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 122 dpll_param *ptr = (dpll_param *) get_core_dpll_param(); 123 void (*f_lock_pll) (u32, u32, u32, u32); 124 int xip_safe, p0, p1, p2, p3; 125 126 xip_safe = is_running_in_sram(); 127 128 /* Moving to the right sysclk and ES rev base */ 129 ptr = ptr + (3 * clk_index) + sil_index; 130 131 if (xip_safe) { 132 /* 133 * CORE DPLL 134 */ 135 clrsetbits_le32(&prcm_base->clken_pll, 136 0x00000007, PLL_FAST_RELOCK_BYPASS); 137 wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen, 138 LDELAY); 139 140 /* 141 * For OMAP3 ES1.0 Errata 1.50, default value directly doesn't 142 * work. write another value and then default value. 143 */ 144 145 /* CM_CLKSEL1_EMU[DIV_DPLL3] */ 146 clrsetbits_le32(&prcm_base->clksel1_emu, 147 0x001F0000, (CORE_M3X2 + 1) << 16) ; 148 clrsetbits_le32(&prcm_base->clksel1_emu, 149 0x001F0000, CORE_M3X2 << 16); 150 151 /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ 152 clrsetbits_le32(&prcm_base->clksel1_pll, 153 0xF8000000, ptr->m2 << 27); 154 155 /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ 156 clrsetbits_le32(&prcm_base->clksel1_pll, 157 0x07FF0000, ptr->m << 16); 158 159 /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ 160 clrsetbits_le32(&prcm_base->clksel1_pll, 161 0x00007F00, ptr->n << 8); 162 163 /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ 164 clrbits_le32(&prcm_base->clksel1_pll, 0x00000040); 165 166 /* SSI */ 167 clrsetbits_le32(&prcm_base->clksel_core, 168 0x00000F00, CORE_SSI_DIV << 8); 169 /* FSUSB */ 170 clrsetbits_le32(&prcm_base->clksel_core, 171 0x00000030, CORE_FUSB_DIV << 4); 172 /* L4 */ 173 clrsetbits_le32(&prcm_base->clksel_core, 174 0x0000000C, CORE_L4_DIV << 2); 175 /* L3 */ 176 clrsetbits_le32(&prcm_base->clksel_core, 177 0x00000003, CORE_L3_DIV); 178 /* GFX */ 179 clrsetbits_le32(&prcm_base->clksel_gfx, 180 0x00000007, GFX_DIV); 181 /* RESET MGR */ 182 clrsetbits_le32(&prcm_base->clksel_wkup, 183 0x00000006, WKUP_RSM << 1); 184 /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ 185 clrsetbits_le32(&prcm_base->clken_pll, 186 0x000000F0, ptr->fsel << 4); 187 /* LOCK MODE */ 188 clrsetbits_le32(&prcm_base->clken_pll, 189 0x00000007, PLL_LOCK); 190 191 wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen, 192 LDELAY); 193 } else if (is_running_in_flash()) { 194 /* 195 * if running from flash, jump to small relocated code 196 * area in SRAM. 197 */ 198 f_lock_pll = (void *) (SRAM_CLK_CODE); 199 200 p0 = readl(&prcm_base->clken_pll); 201 clrsetbits_le32(&p0, 0x00000007, PLL_FAST_RELOCK_BYPASS); 202 /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ 203 clrsetbits_le32(&p0, 0x000000F0, ptr->fsel << 4); 204 205 p1 = readl(&prcm_base->clksel1_pll); 206 /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ 207 clrsetbits_le32(&p1, 0xF8000000, ptr->m2 << 27); 208 /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ 209 clrsetbits_le32(&p1, 0x07FF0000, ptr->m << 16); 210 /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ 211 clrsetbits_le32(&p1, 0x00007F00, ptr->n << 8); 212 /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ 213 clrbits_le32(&p1, 0x00000040); 214 215 p2 = readl(&prcm_base->clksel_core); 216 /* SSI */ 217 clrsetbits_le32(&p2, 0x00000F00, CORE_SSI_DIV << 8); 218 /* FSUSB */ 219 clrsetbits_le32(&p2, 0x00000030, CORE_FUSB_DIV << 4); 220 /* L4 */ 221 clrsetbits_le32(&p2, 0x0000000C, CORE_L4_DIV << 2); 222 /* L3 */ 223 clrsetbits_le32(&p2, 0x00000003, CORE_L3_DIV); 224 225 p3 = (u32)&prcm_base->idlest_ckgen; 226 227 (*f_lock_pll) (p0, p1, p2, p3); 228 } 229 } 230 231 static void dpll4_init_34xx(u32 sil_index, u32 clk_index) 232 { 233 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 234 dpll_param *ptr = (dpll_param *) get_per_dpll_param(); 235 236 /* Moving it to the right sysclk base */ 237 ptr = ptr + clk_index; 238 239 /* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */ 240 clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_STOP << 16); 241 wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); 242 243 /* 244 * Errata 1.50 Workaround for OMAP3 ES1.0 only 245 * If using default divisors, write default divisor + 1 246 * and then the actual divisor value 247 */ 248 /* M6 */ 249 clrsetbits_le32(&prcm_base->clksel1_emu, 250 0x1F000000, (PER_M6X2 + 1) << 24); 251 clrsetbits_le32(&prcm_base->clksel1_emu, 252 0x1F000000, PER_M6X2 << 24); 253 /* M5 */ 254 clrsetbits_le32(&prcm_base->clksel_cam, 0x0000001F, (PER_M5X2 + 1)); 255 clrsetbits_le32(&prcm_base->clksel_cam, 0x0000001F, PER_M5X2); 256 /* M4 */ 257 clrsetbits_le32(&prcm_base->clksel_dss, 0x0000001F, (PER_M4X2 + 1)); 258 clrsetbits_le32(&prcm_base->clksel_dss, 0x0000001F, PER_M4X2); 259 /* M3 */ 260 clrsetbits_le32(&prcm_base->clksel_dss, 261 0x00001F00, (PER_M3X2 + 1) << 8); 262 clrsetbits_le32(&prcm_base->clksel_dss, 263 0x00001F00, PER_M3X2 << 8); 264 /* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */ 265 clrsetbits_le32(&prcm_base->clksel3_pll, 0x0000001F, (ptr->m2 + 1)); 266 clrsetbits_le32(&prcm_base->clksel3_pll, 0x0000001F, ptr->m2); 267 /* Workaround end */ 268 269 /* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:18] */ 270 clrsetbits_le32(&prcm_base->clksel2_pll, 271 0x0007FF00, ptr->m << 8); 272 273 /* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */ 274 clrsetbits_le32(&prcm_base->clksel2_pll, 0x0000007F, ptr->n); 275 276 /* FREQSEL (PERIPH_DPLL_FREQSEL): CM_CLKEN_PLL[20:23] */ 277 clrsetbits_le32(&prcm_base->clken_pll, 0x00F00000, ptr->fsel << 20); 278 279 /* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */ 280 clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_LOCK << 16); 281 wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY); 282 } 283 284 static void dpll5_init_34xx(u32 sil_index, u32 clk_index) 285 { 286 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 287 dpll_param *ptr = (dpll_param *) get_per2_dpll_param(); 288 289 /* Moving it to the right sysclk base */ 290 ptr = ptr + clk_index; 291 292 /* PER2 DPLL (DPLL5) */ 293 clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_STOP); 294 wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY); 295 /* set M2 (usbtll_fck) */ 296 clrsetbits_le32(&prcm_base->clksel5_pll, 0x0000001F, ptr->m2); 297 /* set m (11-bit multiplier) */ 298 clrsetbits_le32(&prcm_base->clksel4_pll, 0x0007FF00, ptr->m << 8); 299 /* set n (7-bit divider)*/ 300 clrsetbits_le32(&prcm_base->clksel4_pll, 0x0000007F, ptr->n); 301 /* FREQSEL */ 302 clrsetbits_le32(&prcm_base->clken_pll, 0x000000F0, ptr->fsel << 4); 303 /* lock mode */ 304 clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_LOCK); 305 wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY); 306 } 307 308 static void mpu_init_34xx(u32 sil_index, u32 clk_index) 309 { 310 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 311 dpll_param *ptr = (dpll_param *) get_mpu_dpll_param(); 312 313 /* Moving to the right sysclk and ES rev base */ 314 ptr = ptr + (3 * clk_index) + sil_index; 315 316 /* MPU DPLL (unlocked already) */ 317 318 /* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */ 319 clrsetbits_le32(&prcm_base->clksel2_pll_mpu, 320 0x0000001F, ptr->m2); 321 322 /* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */ 323 clrsetbits_le32(&prcm_base->clksel1_pll_mpu, 324 0x0007FF00, ptr->m << 8); 325 326 /* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */ 327 clrsetbits_le32(&prcm_base->clksel1_pll_mpu, 328 0x0000007F, ptr->n); 329 330 /* FREQSEL (MPU_DPLL_FREQSEL) : CM_CLKEN_PLL_MPU[4:7] */ 331 clrsetbits_le32(&prcm_base->clken_pll_mpu, 332 0x000000F0, ptr->fsel << 4); 333 } 334 335 static void iva_init_34xx(u32 sil_index, u32 clk_index) 336 { 337 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 338 dpll_param *ptr = (dpll_param *) get_iva_dpll_param(); 339 340 /* Moving to the right sysclk and ES rev base */ 341 ptr = ptr + (3 * clk_index) + sil_index; 342 343 /* IVA DPLL */ 344 /* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */ 345 clrsetbits_le32(&prcm_base->clken_pll_iva2, 346 0x00000007, PLL_STOP); 347 wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY); 348 349 /* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */ 350 clrsetbits_le32(&prcm_base->clksel2_pll_iva2, 351 0x0000001F, ptr->m2); 352 353 /* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */ 354 clrsetbits_le32(&prcm_base->clksel1_pll_iva2, 355 0x0007FF00, ptr->m << 8); 356 357 /* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */ 358 clrsetbits_le32(&prcm_base->clksel1_pll_iva2, 359 0x0000007F, ptr->n); 360 361 /* FREQSEL (IVA2_DPLL_FREQSEL) : CM_CLKEN_PLL_IVA2[4:7] */ 362 clrsetbits_le32(&prcm_base->clken_pll_iva2, 363 0x000000F0, ptr->fsel << 4); 364 365 /* LOCK MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */ 366 clrsetbits_le32(&prcm_base->clken_pll_iva2, 367 0x00000007, PLL_LOCK); 368 369 wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY); 370 } 371 372 /* 373 * OMAP3630 specific functions 374 */ 375 376 static void dpll3_init_36xx(u32 sil_index, u32 clk_index) 377 { 378 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 379 dpll_param *ptr = (dpll_param *) get_36x_core_dpll_param(); 380 void (*f_lock_pll) (u32, u32, u32, u32); 381 int xip_safe, p0, p1, p2, p3; 382 383 xip_safe = is_running_in_sram(); 384 385 /* Moving it to the right sysclk base */ 386 ptr += clk_index; 387 388 if (xip_safe) { 389 /* CORE DPLL */ 390 391 /* Select relock bypass: CM_CLKEN_PLL[0:2] */ 392 clrsetbits_le32(&prcm_base->clken_pll, 393 0x00000007, PLL_FAST_RELOCK_BYPASS); 394 wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen, 395 LDELAY); 396 397 /* CM_CLKSEL1_EMU[DIV_DPLL3] */ 398 clrsetbits_le32(&prcm_base->clksel1_emu, 399 0x001F0000, CORE_M3X2 << 16); 400 401 /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ 402 clrsetbits_le32(&prcm_base->clksel1_pll, 403 0xF8000000, ptr->m2 << 27); 404 405 /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ 406 clrsetbits_le32(&prcm_base->clksel1_pll, 407 0x07FF0000, ptr->m << 16); 408 409 /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ 410 clrsetbits_le32(&prcm_base->clksel1_pll, 411 0x00007F00, ptr->n << 8); 412 413 /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ 414 clrbits_le32(&prcm_base->clksel1_pll, 0x00000040); 415 416 /* SSI */ 417 clrsetbits_le32(&prcm_base->clksel_core, 418 0x00000F00, CORE_SSI_DIV << 8); 419 /* FSUSB */ 420 clrsetbits_le32(&prcm_base->clksel_core, 421 0x00000030, CORE_FUSB_DIV << 4); 422 /* L4 */ 423 clrsetbits_le32(&prcm_base->clksel_core, 424 0x0000000C, CORE_L4_DIV << 2); 425 /* L3 */ 426 clrsetbits_le32(&prcm_base->clksel_core, 427 0x00000003, CORE_L3_DIV); 428 /* GFX */ 429 clrsetbits_le32(&prcm_base->clksel_gfx, 430 0x00000007, GFX_DIV_36X); 431 /* RESET MGR */ 432 clrsetbits_le32(&prcm_base->clksel_wkup, 433 0x00000006, WKUP_RSM << 1); 434 /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ 435 clrsetbits_le32(&prcm_base->clken_pll, 436 0x000000F0, ptr->fsel << 4); 437 /* LOCK MODE */ 438 clrsetbits_le32(&prcm_base->clken_pll, 439 0x00000007, PLL_LOCK); 440 441 wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen, 442 LDELAY); 443 } else if (is_running_in_flash()) { 444 /* 445 * if running from flash, jump to small relocated code 446 * area in SRAM. 447 */ 448 f_lock_pll = (void *) (SRAM_CLK_CODE); 449 450 p0 = readl(&prcm_base->clken_pll); 451 clrsetbits_le32(&p0, 0x00000007, PLL_FAST_RELOCK_BYPASS); 452 /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */ 453 clrsetbits_le32(&p0, 0x000000F0, ptr->fsel << 4); 454 455 p1 = readl(&prcm_base->clksel1_pll); 456 /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */ 457 clrsetbits_le32(&p1, 0xF8000000, ptr->m2 << 27); 458 /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */ 459 clrsetbits_le32(&p1, 0x07FF0000, ptr->m << 16); 460 /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */ 461 clrsetbits_le32(&p1, 0x00007F00, ptr->n << 8); 462 /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */ 463 clrbits_le32(&p1, 0x00000040); 464 465 p2 = readl(&prcm_base->clksel_core); 466 /* SSI */ 467 clrsetbits_le32(&p2, 0x00000F00, CORE_SSI_DIV << 8); 468 /* FSUSB */ 469 clrsetbits_le32(&p2, 0x00000030, CORE_FUSB_DIV << 4); 470 /* L4 */ 471 clrsetbits_le32(&p2, 0x0000000C, CORE_L4_DIV << 2); 472 /* L3 */ 473 clrsetbits_le32(&p2, 0x00000003, CORE_L3_DIV); 474 475 p3 = (u32)&prcm_base->idlest_ckgen; 476 477 (*f_lock_pll) (p0, p1, p2, p3); 478 } 479 } 480 481 static void dpll4_init_36xx(u32 sil_index, u32 clk_index) 482 { 483 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 484 struct dpll_per_36x_param *ptr; 485 486 ptr = (struct dpll_per_36x_param *)get_36x_per_dpll_param(); 487 488 /* Moving it to the right sysclk base */ 489 ptr += clk_index; 490 491 /* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */ 492 clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_STOP << 16); 493 wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY); 494 495 /* M6 (DIV_DPLL4): CM_CLKSEL1_EMU[24:29] */ 496 clrsetbits_le32(&prcm_base->clksel1_emu, 0x3F000000, ptr->m6 << 24); 497 498 /* M5 (CLKSEL_CAM): CM_CLKSEL1_EMU[0:5] */ 499 clrsetbits_le32(&prcm_base->clksel_cam, 0x0000003F, ptr->m5); 500 501 /* M4 (CLKSEL_DSS1): CM_CLKSEL_DSS[0:5] */ 502 clrsetbits_le32(&prcm_base->clksel_dss, 0x0000003F, ptr->m4); 503 504 /* M3 (CLKSEL_DSS1): CM_CLKSEL_DSS[8:13] */ 505 clrsetbits_le32(&prcm_base->clksel_dss, 0x00003F00, ptr->m3 << 8); 506 507 /* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */ 508 clrsetbits_le32(&prcm_base->clksel3_pll, 0x0000001F, ptr->m2); 509 510 /* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:19] */ 511 clrsetbits_le32(&prcm_base->clksel2_pll, 0x000FFF00, ptr->m << 8); 512 513 /* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */ 514 clrsetbits_le32(&prcm_base->clksel2_pll, 0x0000007F, ptr->n); 515 516 /* M2DIV (CLKSEL_96M): CM_CLKSEL_CORE[12:13] */ 517 clrsetbits_le32(&prcm_base->clksel_core, 0x00003000, ptr->m2div << 12); 518 519 /* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */ 520 clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_LOCK << 16); 521 wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY); 522 } 523 524 static void dpll5_init_36xx(u32 sil_index, u32 clk_index) 525 { 526 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 527 dpll_param *ptr = (dpll_param *) get_36x_per2_dpll_param(); 528 529 /* Moving it to the right sysclk base */ 530 ptr = ptr + clk_index; 531 532 /* PER2 DPLL (DPLL5) */ 533 clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_STOP); 534 wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY); 535 /* set M2 (usbtll_fck) */ 536 clrsetbits_le32(&prcm_base->clksel5_pll, 0x0000001F, ptr->m2); 537 /* set m (11-bit multiplier) */ 538 clrsetbits_le32(&prcm_base->clksel4_pll, 0x0007FF00, ptr->m << 8); 539 /* set n (7-bit divider)*/ 540 clrsetbits_le32(&prcm_base->clksel4_pll, 0x0000007F, ptr->n); 541 /* lock mode */ 542 clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_LOCK); 543 wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY); 544 } 545 546 static void mpu_init_36xx(u32 sil_index, u32 clk_index) 547 { 548 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 549 dpll_param *ptr = (dpll_param *) get_36x_mpu_dpll_param(); 550 551 /* Moving to the right sysclk */ 552 ptr += clk_index; 553 554 /* MPU DPLL (unlocked already */ 555 556 /* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */ 557 clrsetbits_le32(&prcm_base->clksel2_pll_mpu, 0x0000001F, ptr->m2); 558 559 /* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */ 560 clrsetbits_le32(&prcm_base->clksel1_pll_mpu, 0x0007FF00, ptr->m << 8); 561 562 /* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */ 563 clrsetbits_le32(&prcm_base->clksel1_pll_mpu, 0x0000007F, ptr->n); 564 } 565 566 static void iva_init_36xx(u32 sil_index, u32 clk_index) 567 { 568 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 569 dpll_param *ptr = (dpll_param *)get_36x_iva_dpll_param(); 570 571 /* Moving to the right sysclk */ 572 ptr += clk_index; 573 574 /* IVA DPLL */ 575 /* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */ 576 clrsetbits_le32(&prcm_base->clken_pll_iva2, 0x00000007, PLL_STOP); 577 wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY); 578 579 /* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */ 580 clrsetbits_le32(&prcm_base->clksel2_pll_iva2, 0x0000001F, ptr->m2); 581 582 /* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */ 583 clrsetbits_le32(&prcm_base->clksel1_pll_iva2, 0x0007FF00, ptr->m << 8); 584 585 /* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */ 586 clrsetbits_le32(&prcm_base->clksel1_pll_iva2, 0x0000007F, ptr->n); 587 588 /* LOCK (MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */ 589 clrsetbits_le32(&prcm_base->clken_pll_iva2, 0x00000007, PLL_LOCK); 590 591 wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY); 592 } 593 594 /****************************************************************************** 595 * prcm_init() - inits clocks for PRCM as defined in clocks.h 596 * called from SRAM, or Flash (using temp SRAM stack). 597 *****************************************************************************/ 598 void prcm_init(void) 599 { 600 u32 osc_clk = 0, sys_clkin_sel; 601 u32 clk_index, sil_index = 0; 602 struct prm *prm_base = (struct prm *)PRM_BASE; 603 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 604 605 /* 606 * Gauge the input clock speed and find out the sys_clkin_sel 607 * value corresponding to the input clock. 608 */ 609 osc_clk = get_osc_clk_speed(); 610 get_sys_clkin_sel(osc_clk, &sys_clkin_sel); 611 612 /* set input crystal speed */ 613 clrsetbits_le32(&prm_base->clksel, 0x00000007, sys_clkin_sel); 614 615 /* If the input clock is greater than 19.2M always divide/2 */ 616 if (sys_clkin_sel > 2) { 617 /* input clock divider */ 618 clrsetbits_le32(&prm_base->clksrc_ctrl, 0x000000C0, 2 << 6); 619 clk_index = sys_clkin_sel / 2; 620 } else { 621 /* input clock divider */ 622 clrsetbits_le32(&prm_base->clksrc_ctrl, 0x000000C0, 1 << 6); 623 clk_index = sys_clkin_sel; 624 } 625 626 if (get_cpu_family() == CPU_OMAP36XX) { 627 /* 628 * In warm reset conditions on OMAP36xx/AM/DM37xx 629 * the rom code incorrectly sets the DPLL4 clock 630 * input divider to /6.5. Section 3.5.3.3.3.2.1 of 631 * the AM/DM37x TRM explains that the /6.5 divider 632 * is used only when the input clock is 13MHz. 633 * 634 * If the part is in this cpu family *and* the input 635 * clock *is not* 13 MHz, then reset the DPLL4 clock 636 * input divider to /1 as it should never set to /6.5 637 * in this case. 638 */ 639 if (sys_clkin_sel != 1) { /* 13 MHz */ 640 /* Bit 8: DPLL4_CLKINP_DIV */ 641 clrbits_le32(&prm_base->clksrc_ctrl, 0x00000100); 642 } 643 644 /* Unlock MPU DPLL (slows things down, and needed later) */ 645 clrsetbits_le32(&prcm_base->clken_pll_mpu, 646 0x00000007, PLL_LOW_POWER_BYPASS); 647 wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu, 648 LDELAY); 649 650 dpll3_init_36xx(0, clk_index); 651 dpll4_init_36xx(0, clk_index); 652 dpll5_init_36xx(0, clk_index); 653 iva_init_36xx(0, clk_index); 654 mpu_init_36xx(0, clk_index); 655 656 /* Lock MPU DPLL to set frequency */ 657 clrsetbits_le32(&prcm_base->clken_pll_mpu, 658 0x00000007, PLL_LOCK); 659 wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu, 660 LDELAY); 661 } else { 662 /* 663 * The DPLL tables are defined according to sysclk value and 664 * silicon revision. The clk_index value will be used to get 665 * the values for that input sysclk from the DPLL param table 666 * and sil_index will get the values for that SysClk for the 667 * appropriate silicon rev. 668 */ 669 if (((get_cpu_family() == CPU_OMAP34XX) 670 && (get_cpu_rev() >= CPU_3XX_ES20)) || 671 (get_cpu_family() == CPU_AM35XX)) 672 sil_index = 1; 673 674 /* Unlock MPU DPLL (slows things down, and needed later) */ 675 clrsetbits_le32(&prcm_base->clken_pll_mpu, 676 0x00000007, PLL_LOW_POWER_BYPASS); 677 wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu, 678 LDELAY); 679 680 dpll3_init_34xx(sil_index, clk_index); 681 dpll4_init_34xx(sil_index, clk_index); 682 dpll5_init_34xx(sil_index, clk_index); 683 if (get_cpu_family() != CPU_AM35XX) 684 iva_init_34xx(sil_index, clk_index); 685 686 mpu_init_34xx(sil_index, clk_index); 687 688 /* Lock MPU DPLL to set frequency */ 689 clrsetbits_le32(&prcm_base->clken_pll_mpu, 690 0x00000007, PLL_LOCK); 691 wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu, 692 LDELAY); 693 } 694 695 /* Set up GPTimers to sys_clk source only */ 696 setbits_le32(&prcm_base->clksel_per, 0x000000FF); 697 setbits_le32(&prcm_base->clksel_wkup, 1); 698 699 sdelay(5000); 700 } 701 702 /* 703 * Enable usb ehci uhh, tll clocks 704 */ 705 void ehci_clocks_enable(void) 706 { 707 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 708 709 /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */ 710 setbits_le32(&prcm_base->iclken_usbhost, 1); 711 /* 712 * Enable USBHOST_48M_FCLK (USBHOST_FCLK1) 713 * and USBHOST_120M_FCLK (USBHOST_FCLK2) 714 */ 715 setbits_le32(&prcm_base->fclken_usbhost, 0x00000003); 716 /* Enable USBTTL_ICLK */ 717 setbits_le32(&prcm_base->iclken3_core, 0x00000004); 718 /* Enable USBTTL_FCLK */ 719 setbits_le32(&prcm_base->fclken3_core, 0x00000004); 720 } 721 722 /****************************************************************************** 723 * peripheral_enable() - Enable the clks & power for perifs (GPT2, UART1,...) 724 *****************************************************************************/ 725 void per_clocks_enable(void) 726 { 727 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 728 729 /* Enable GP2 timer. */ 730 setbits_le32(&prcm_base->clksel_per, 0x01); /* GPT2 = sys clk */ 731 setbits_le32(&prcm_base->iclken_per, 0x08); /* ICKen GPT2 */ 732 setbits_le32(&prcm_base->fclken_per, 0x08); /* FCKen GPT2 */ 733 734 /* Enable GP9 timer. */ 735 setbits_le32(&prcm_base->clksel_per, 0x80); /* GPT9 = 32kHz clk */ 736 setbits_le32(&prcm_base->iclken_per, 0x400); /* ICKen GPT9 */ 737 setbits_le32(&prcm_base->fclken_per, 0x400); /* FCKen GPT9 */ 738 739 #ifdef CONFIG_SYS_NS16550 740 /* Enable UART1 clocks */ 741 setbits_le32(&prcm_base->fclken1_core, 0x00002000); 742 setbits_le32(&prcm_base->iclken1_core, 0x00002000); 743 744 /* Enable UART2 clocks */ 745 setbits_le32(&prcm_base->fclken1_core, 0x00004000); 746 setbits_le32(&prcm_base->iclken1_core, 0x00004000); 747 748 /* UART 3 Clocks */ 749 setbits_le32(&prcm_base->fclken_per, 0x00000800); 750 setbits_le32(&prcm_base->iclken_per, 0x00000800); 751 #endif 752 753 #if defined(CONFIG_OMAP3_GPIO_2) 754 setbits_le32(&prcm_base->fclken_per, 0x00002000); 755 setbits_le32(&prcm_base->iclken_per, 0x00002000); 756 #endif 757 #if defined(CONFIG_OMAP3_GPIO_3) 758 setbits_le32(&prcm_base->fclken_per, 0x00004000); 759 setbits_le32(&prcm_base->iclken_per, 0x00004000); 760 #endif 761 #if defined(CONFIG_OMAP3_GPIO_4) 762 setbits_le32(&prcm_base->fclken_per, 0x00008000); 763 setbits_le32(&prcm_base->iclken_per, 0x00008000); 764 #endif 765 #if defined(CONFIG_OMAP3_GPIO_5) 766 setbits_le32(&prcm_base->fclken_per, 0x00010000); 767 setbits_le32(&prcm_base->iclken_per, 0x00010000); 768 #endif 769 #if defined(CONFIG_OMAP3_GPIO_6) 770 setbits_le32(&prcm_base->fclken_per, 0x00020000); 771 setbits_le32(&prcm_base->iclken_per, 0x00020000); 772 #endif 773 774 #ifdef CONFIG_SYS_I2C_OMAP24XX 775 /* Turn on all 3 I2C clocks */ 776 setbits_le32(&prcm_base->fclken1_core, 0x00038000); 777 setbits_le32(&prcm_base->iclken1_core, 0x00038000); /* I2C1,2,3 = on */ 778 #endif 779 /* Enable the ICLK for 32K Sync Timer as its used in udelay */ 780 setbits_le32(&prcm_base->iclken_wkup, 0x00000004); 781 782 if (get_cpu_family() != CPU_AM35XX) 783 out_le32(&prcm_base->fclken_iva2, FCK_IVA2_ON); 784 785 out_le32(&prcm_base->fclken1_core, FCK_CORE1_ON); 786 out_le32(&prcm_base->iclken1_core, ICK_CORE1_ON); 787 out_le32(&prcm_base->iclken2_core, ICK_CORE2_ON); 788 out_le32(&prcm_base->fclken_wkup, FCK_WKUP_ON); 789 out_le32(&prcm_base->iclken_wkup, ICK_WKUP_ON); 790 out_le32(&prcm_base->fclken_dss, FCK_DSS_ON); 791 out_le32(&prcm_base->iclken_dss, ICK_DSS_ON); 792 if (get_cpu_family() != CPU_AM35XX) { 793 out_le32(&prcm_base->fclken_cam, FCK_CAM_ON); 794 out_le32(&prcm_base->iclken_cam, ICK_CAM_ON); 795 } 796 797 sdelay(1000); 798 } 799