1 /* 2 * (C) Copyright 2010-2015 3 * NVIDIA Corporation <www.nvidia.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* Tegra114 Clock control functions */ 9 10 #include <common.h> 11 #include <asm/io.h> 12 #include <asm/arch/clock.h> 13 #include <asm/arch/sysctr.h> 14 #include <asm/arch/tegra.h> 15 #include <asm/arch-tegra/clk_rst.h> 16 #include <asm/arch-tegra/timer.h> 17 #include <div64.h> 18 #include <fdtdec.h> 19 20 /* 21 * Clock types that we can use as a source. The Tegra114 has muxes for the 22 * peripheral clocks, and in most cases there are four options for the clock 23 * source. This gives us a clock 'type' and exploits what commonality exists 24 * in the device. 25 * 26 * Letters are obvious, except for T which means CLK_M, and S which means the 27 * clock derived from 32KHz. Beware that CLK_M (also called OSC in the 28 * datasheet) and PLL_M are different things. The former is the basic 29 * clock supplied to the SOC from an external oscillator. The latter is the 30 * memory clock PLL. 31 * 32 * See definitions in clock_id in the header file. 33 */ 34 enum clock_type_id { 35 CLOCK_TYPE_AXPT, /* PLL_A, PLL_X, PLL_P, CLK_M */ 36 CLOCK_TYPE_MCPA, /* and so on */ 37 CLOCK_TYPE_MCPT, 38 CLOCK_TYPE_PCM, 39 CLOCK_TYPE_PCMT, 40 CLOCK_TYPE_PCMT16, 41 CLOCK_TYPE_PDCT, 42 CLOCK_TYPE_ACPT, 43 CLOCK_TYPE_ASPTE, 44 CLOCK_TYPE_PMDACD2T, 45 CLOCK_TYPE_PCST, 46 47 CLOCK_TYPE_COUNT, 48 CLOCK_TYPE_NONE = -1, /* invalid clock type */ 49 }; 50 51 enum { 52 CLOCK_MAX_MUX = 8 /* number of source options for each clock */ 53 }; 54 55 /* 56 * Clock source mux for each clock type. This just converts our enum into 57 * a list of mux sources for use by the code. 58 * 59 * Note: 60 * The extra column in each clock source array is used to store the mask 61 * bits in its register for the source. 62 */ 63 #define CLK(x) CLOCK_ID_ ## x 64 static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX+1] = { 65 { CLK(AUDIO), CLK(XCPU), CLK(PERIPH), CLK(OSC), 66 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 67 MASK_BITS_31_30}, 68 { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(AUDIO), 69 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 70 MASK_BITS_31_30}, 71 { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC), 72 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 73 MASK_BITS_31_30}, 74 { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(NONE), 75 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 76 MASK_BITS_31_30}, 77 { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC), 78 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 79 MASK_BITS_31_30}, 80 { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC), 81 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 82 MASK_BITS_31_30}, 83 { CLK(PERIPH), CLK(DISPLAY), CLK(CGENERAL), CLK(OSC), 84 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 85 MASK_BITS_31_30}, 86 { CLK(AUDIO), CLK(CGENERAL), CLK(PERIPH), CLK(OSC), 87 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 88 MASK_BITS_31_30}, 89 { CLK(AUDIO), CLK(SFROM32KHZ), CLK(PERIPH), CLK(OSC), 90 CLK(EPCI), CLK(NONE), CLK(NONE), CLK(NONE), 91 MASK_BITS_31_29}, 92 { CLK(PERIPH), CLK(MEMORY), CLK(DISPLAY), CLK(AUDIO), 93 CLK(CGENERAL), CLK(DISPLAY2), CLK(OSC), CLK(NONE), 94 MASK_BITS_31_29}, 95 { CLK(PERIPH), CLK(CGENERAL), CLK(SFROM32KHZ), CLK(OSC), 96 CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE), 97 MASK_BITS_31_28} 98 }; 99 100 /* 101 * Clock type for each peripheral clock source. We put the name in each 102 * record just so it is easy to match things up 103 */ 104 #define TYPE(name, type) type 105 static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = { 106 /* 0x00 */ 107 TYPE(PERIPHC_I2S1, CLOCK_TYPE_AXPT), 108 TYPE(PERIPHC_I2S2, CLOCK_TYPE_AXPT), 109 TYPE(PERIPHC_SPDIF_OUT, CLOCK_TYPE_AXPT), 110 TYPE(PERIPHC_SPDIF_IN, CLOCK_TYPE_PCM), 111 TYPE(PERIPHC_PWM, CLOCK_TYPE_PCST), /* only PWM uses b29:28 */ 112 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 113 TYPE(PERIPHC_SBC2, CLOCK_TYPE_PCMT), 114 TYPE(PERIPHC_SBC3, CLOCK_TYPE_PCMT), 115 116 /* 0x08 */ 117 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 118 TYPE(PERIPHC_I2C1, CLOCK_TYPE_PCMT16), 119 TYPE(PERIPHC_I2C5, CLOCK_TYPE_PCMT16), 120 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 121 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 122 TYPE(PERIPHC_SBC1, CLOCK_TYPE_PCMT), 123 TYPE(PERIPHC_DISP1, CLOCK_TYPE_PMDACD2T), 124 TYPE(PERIPHC_DISP2, CLOCK_TYPE_PMDACD2T), 125 126 /* 0x10 */ 127 TYPE(PERIPHC_CVE, CLOCK_TYPE_PDCT), 128 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 129 TYPE(PERIPHC_VI, CLOCK_TYPE_MCPA), 130 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 131 TYPE(PERIPHC_SDMMC1, CLOCK_TYPE_PCMT), 132 TYPE(PERIPHC_SDMMC2, CLOCK_TYPE_PCMT), 133 TYPE(PERIPHC_G3D, CLOCK_TYPE_MCPA), 134 TYPE(PERIPHC_G2D, CLOCK_TYPE_MCPA), 135 136 /* 0x18 */ 137 TYPE(PERIPHC_NDFLASH, CLOCK_TYPE_PCMT), 138 TYPE(PERIPHC_SDMMC4, CLOCK_TYPE_PCMT), 139 TYPE(PERIPHC_VFIR, CLOCK_TYPE_PCMT), 140 TYPE(PERIPHC_EPP, CLOCK_TYPE_MCPA), 141 TYPE(PERIPHC_MPE, CLOCK_TYPE_MCPA), 142 TYPE(PERIPHC_MIPI, CLOCK_TYPE_PCMT), /* MIPI base-band HSI */ 143 TYPE(PERIPHC_UART1, CLOCK_TYPE_PCMT), 144 TYPE(PERIPHC_UART2, CLOCK_TYPE_PCMT), 145 146 /* 0x20 */ 147 TYPE(PERIPHC_HOST1X, CLOCK_TYPE_MCPA), 148 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 149 TYPE(PERIPHC_TVO, CLOCK_TYPE_PDCT), 150 TYPE(PERIPHC_HDMI, CLOCK_TYPE_PMDACD2T), 151 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 152 TYPE(PERIPHC_TVDAC, CLOCK_TYPE_PDCT), 153 TYPE(PERIPHC_I2C2, CLOCK_TYPE_PCMT16), 154 TYPE(PERIPHC_EMC, CLOCK_TYPE_MCPT), 155 156 /* 0x28 */ 157 TYPE(PERIPHC_UART3, CLOCK_TYPE_PCMT), 158 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 159 TYPE(PERIPHC_VI, CLOCK_TYPE_MCPA), 160 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 161 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 162 TYPE(PERIPHC_SBC4, CLOCK_TYPE_PCMT), 163 TYPE(PERIPHC_I2C3, CLOCK_TYPE_PCMT16), 164 TYPE(PERIPHC_SDMMC3, CLOCK_TYPE_PCMT), 165 166 /* 0x30 */ 167 TYPE(PERIPHC_UART4, CLOCK_TYPE_PCMT), 168 TYPE(PERIPHC_UART5, CLOCK_TYPE_PCMT), 169 TYPE(PERIPHC_VDE, CLOCK_TYPE_PCMT), 170 TYPE(PERIPHC_OWR, CLOCK_TYPE_PCMT), 171 TYPE(PERIPHC_NOR, CLOCK_TYPE_PCMT), 172 TYPE(PERIPHC_CSITE, CLOCK_TYPE_PCMT), 173 TYPE(PERIPHC_I2S0, CLOCK_TYPE_AXPT), 174 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 175 176 /* 0x38h */ /* Jumps to reg offset 0x3B0h */ 177 TYPE(PERIPHC_G3D2, CLOCK_TYPE_MCPA), 178 TYPE(PERIPHC_MSELECT, CLOCK_TYPE_PCMT), 179 TYPE(PERIPHC_TSENSOR, CLOCK_TYPE_PCST), /* s/b PCTS */ 180 TYPE(PERIPHC_I2S3, CLOCK_TYPE_AXPT), 181 TYPE(PERIPHC_I2S4, CLOCK_TYPE_AXPT), 182 TYPE(PERIPHC_I2C4, CLOCK_TYPE_PCMT16), 183 TYPE(PERIPHC_SBC5, CLOCK_TYPE_PCMT), 184 TYPE(PERIPHC_SBC6, CLOCK_TYPE_PCMT), 185 186 /* 0x40 */ 187 TYPE(PERIPHC_AUDIO, CLOCK_TYPE_ACPT), 188 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 189 TYPE(PERIPHC_DAM0, CLOCK_TYPE_ACPT), 190 TYPE(PERIPHC_DAM1, CLOCK_TYPE_ACPT), 191 TYPE(PERIPHC_DAM2, CLOCK_TYPE_ACPT), 192 TYPE(PERIPHC_HDA2CODEC2X, CLOCK_TYPE_PCMT), 193 TYPE(PERIPHC_ACTMON, CLOCK_TYPE_PCST), /* MASK 31:30 */ 194 TYPE(PERIPHC_EXTPERIPH1, CLOCK_TYPE_ASPTE), 195 196 /* 0x48 */ 197 TYPE(PERIPHC_EXTPERIPH2, CLOCK_TYPE_ASPTE), 198 TYPE(PERIPHC_EXTPERIPH3, CLOCK_TYPE_ASPTE), 199 TYPE(PERIPHC_NANDSPEED, CLOCK_TYPE_PCMT), 200 TYPE(PERIPHC_I2CSLOW, CLOCK_TYPE_PCST), /* MASK 31:30 */ 201 TYPE(PERIPHC_SYS, CLOCK_TYPE_NONE), 202 TYPE(PERIPHC_SPEEDO, CLOCK_TYPE_PCMT), 203 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 204 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 205 206 /* 0x50 */ 207 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 208 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 209 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 210 TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), 211 TYPE(PERIPHC_SATAOOB, CLOCK_TYPE_PCMT), /* offset 0x420h */ 212 TYPE(PERIPHC_SATA, CLOCK_TYPE_PCMT), 213 TYPE(PERIPHC_HDA, CLOCK_TYPE_PCMT), 214 }; 215 216 /* 217 * This array translates a periph_id to a periphc_internal_id 218 * 219 * Not present/matched up: 220 * uint vi_sensor; _VI_SENSOR_0, 0x1A8 221 * SPDIF - which is both 0x08 and 0x0c 222 * 223 */ 224 #define NONE(name) (-1) 225 #define OFFSET(name, value) PERIPHC_ ## name 226 static s8 periph_id_to_internal_id[PERIPH_ID_COUNT] = { 227 /* Low word: 31:0 */ 228 NONE(CPU), 229 NONE(COP), 230 NONE(TRIGSYS), 231 NONE(RESERVED3), 232 NONE(RTC), 233 NONE(TMR), 234 PERIPHC_UART1, 235 PERIPHC_UART2, /* and vfir 0x68 */ 236 237 /* 8 */ 238 NONE(GPIO), 239 PERIPHC_SDMMC2, 240 NONE(SPDIF), /* 0x08 and 0x0c, unclear which to use */ 241 PERIPHC_I2S1, 242 PERIPHC_I2C1, 243 PERIPHC_NDFLASH, 244 PERIPHC_SDMMC1, 245 PERIPHC_SDMMC4, 246 247 /* 16 */ 248 NONE(RESERVED16), 249 PERIPHC_PWM, 250 PERIPHC_I2S2, 251 PERIPHC_EPP, 252 PERIPHC_VI, 253 PERIPHC_G2D, 254 NONE(USBD), 255 NONE(ISP), 256 257 /* 24 */ 258 PERIPHC_G3D, 259 NONE(RESERVED25), 260 PERIPHC_DISP2, 261 PERIPHC_DISP1, 262 PERIPHC_HOST1X, 263 NONE(VCP), 264 PERIPHC_I2S0, 265 NONE(CACHE2), 266 267 /* Middle word: 63:32 */ 268 NONE(MEM), 269 NONE(AHBDMA), 270 NONE(APBDMA), 271 NONE(RESERVED35), 272 NONE(RESERVED36), 273 NONE(STAT_MON), 274 NONE(RESERVED38), 275 NONE(RESERVED39), 276 277 /* 40 */ 278 NONE(KFUSE), 279 NONE(SBC1), /* SBC1, 0x34, is this SPI1? */ 280 PERIPHC_NOR, 281 NONE(RESERVED43), 282 PERIPHC_SBC2, 283 NONE(RESERVED45), 284 PERIPHC_SBC3, 285 PERIPHC_I2C5, 286 287 /* 48 */ 288 NONE(DSI), 289 PERIPHC_TVO, /* also CVE 0x40 */ 290 PERIPHC_MIPI, 291 PERIPHC_HDMI, 292 NONE(CSI), 293 PERIPHC_TVDAC, 294 PERIPHC_I2C2, 295 PERIPHC_UART3, 296 297 /* 56 */ 298 NONE(RESERVED56), 299 PERIPHC_EMC, 300 NONE(USB2), 301 NONE(USB3), 302 PERIPHC_MPE, 303 PERIPHC_VDE, 304 NONE(BSEA), 305 NONE(BSEV), 306 307 /* Upper word 95:64 */ 308 PERIPHC_SPEEDO, 309 PERIPHC_UART4, 310 PERIPHC_UART5, 311 PERIPHC_I2C3, 312 PERIPHC_SBC4, 313 PERIPHC_SDMMC3, 314 NONE(PCIE), 315 PERIPHC_OWR, 316 317 /* 72 */ 318 NONE(AFI), 319 PERIPHC_CSITE, 320 NONE(PCIEXCLK), 321 NONE(AVPUCQ), 322 NONE(RESERVED76), 323 NONE(RESERVED77), 324 NONE(RESERVED78), 325 NONE(DTV), 326 327 /* 80 */ 328 PERIPHC_NANDSPEED, 329 PERIPHC_I2CSLOW, 330 NONE(DSIB), 331 NONE(RESERVED83), 332 NONE(IRAMA), 333 NONE(IRAMB), 334 NONE(IRAMC), 335 NONE(IRAMD), 336 337 /* 88 */ 338 NONE(CRAM2), 339 NONE(RESERVED89), 340 NONE(MDOUBLER), 341 NONE(RESERVED91), 342 NONE(SUSOUT), 343 NONE(RESERVED93), 344 NONE(RESERVED94), 345 NONE(RESERVED95), 346 347 /* V word: 31:0 */ 348 NONE(CPUG), 349 NONE(CPULP), 350 PERIPHC_G3D2, 351 PERIPHC_MSELECT, 352 PERIPHC_TSENSOR, 353 PERIPHC_I2S3, 354 PERIPHC_I2S4, 355 PERIPHC_I2C4, 356 357 /* 08 */ 358 PERIPHC_SBC5, 359 PERIPHC_SBC6, 360 PERIPHC_AUDIO, 361 NONE(APBIF), 362 PERIPHC_DAM0, 363 PERIPHC_DAM1, 364 PERIPHC_DAM2, 365 PERIPHC_HDA2CODEC2X, 366 367 /* 16 */ 368 NONE(ATOMICS), 369 NONE(RESERVED17), 370 NONE(RESERVED18), 371 NONE(RESERVED19), 372 NONE(RESERVED20), 373 NONE(RESERVED21), 374 NONE(RESERVED22), 375 PERIPHC_ACTMON, 376 377 /* 24 */ 378 NONE(RESERVED24), 379 NONE(RESERVED25), 380 NONE(RESERVED26), 381 NONE(RESERVED27), 382 PERIPHC_SATA, 383 PERIPHC_HDA, 384 NONE(RESERVED30), 385 NONE(RESERVED31), 386 387 /* W word: 31:0 */ 388 NONE(HDA2HDMICODEC), 389 NONE(RESERVED1_SATACOLD), 390 NONE(RESERVED2_PCIERX0), 391 NONE(RESERVED3_PCIERX1), 392 NONE(RESERVED4_PCIERX2), 393 NONE(RESERVED5_PCIERX3), 394 NONE(RESERVED6_PCIERX4), 395 NONE(RESERVED7_PCIERX5), 396 397 /* 40 */ 398 NONE(CEC), 399 NONE(PCIE2_IOBIST), 400 NONE(EMC_IOBIST), 401 NONE(HDMI_IOBIST), 402 NONE(SATA_IOBIST), 403 NONE(MIPI_IOBIST), 404 NONE(EMC1_IOBIST), 405 NONE(XUSB), 406 407 /* 48 */ 408 NONE(CILAB), 409 NONE(CILCD), 410 NONE(CILE), 411 NONE(DSIA_LP), 412 NONE(DSIB_LP), 413 NONE(RESERVED21_ENTROPY), 414 NONE(RESERVED22_W), 415 NONE(RESERVED23_W), 416 417 /* 56 */ 418 NONE(RESERVED24_W), 419 NONE(AMX0), 420 NONE(ADX0), 421 NONE(DVFS), 422 NONE(XUSB_SS), 423 NONE(EMC_DLL), 424 NONE(MC1), 425 NONE(EMC1), 426 }; 427 428 /* 429 * PLL divider shift/mask tables for all PLL IDs. 430 */ 431 struct clk_pll_info tegra_pll_info_table[CLOCK_ID_PLL_COUNT] = { 432 /* 433 * T114: some deviations from T2x/T30. 434 * NOTE: If kcp_mask/kvco_mask == 0, they're not used in that PLL (PLLX, etc.) 435 * If lock_ena or lock_det are >31, they're not used in that PLL. 436 */ 437 438 { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0xFF, .p_shift = 20, .p_mask = 0x0F, 439 .lock_ena = 24, .lock_det = 27, .kcp_shift = 28, .kcp_mask = 3, .kvco_shift = 27, .kvco_mask = 1 }, /* PLLC */ 440 { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0xFF, .p_shift = 0, .p_mask = 0, 441 .lock_ena = 0, .lock_det = 27, .kcp_shift = 1, .kcp_mask = 3, .kvco_shift = 0, .kvco_mask = 1 }, /* PLLM */ 442 { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, 443 .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLP */ 444 { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, 445 .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLA */ 446 { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x01, 447 .lock_ena = 22, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLU */ 448 { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, 449 .lock_ena = 22, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLD */ 450 { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0xFF, .p_shift = 20, .p_mask = 0x0F, 451 .lock_ena = 18, .lock_det = 27, .kcp_shift = 0, .kcp_mask = 0, .kvco_shift = 0, .kvco_mask = 0 }, /* PLLX */ 452 { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0xFF, .p_shift = 0, .p_mask = 0, 453 .lock_ena = 9, .lock_det = 11, .kcp_shift = 6, .kcp_mask = 3, .kvco_shift = 0, .kvco_mask = 1 }, /* PLLE */ 454 { .m_shift = 0, .m_mask = 0x0F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, 455 .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLS (RESERVED) */ 456 }; 457 458 /* 459 * Get the oscillator frequency, from the corresponding hardware configuration 460 * field. Note that T30/T114 support 3 new higher freqs, but we map back 461 * to the old T20 freqs. Support for the higher oscillators is TBD. 462 */ 463 enum clock_osc_freq clock_get_osc_freq(void) 464 { 465 struct clk_rst_ctlr *clkrst = 466 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; 467 u32 reg; 468 469 reg = readl(&clkrst->crc_osc_ctrl); 470 reg = (reg & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT; 471 472 if (reg & 1) /* one of the newer freqs */ 473 printf("Warning: OSC_FREQ is unsupported! (%d)\n", reg); 474 475 return reg >> 2; /* Map to most common (T20) freqs */ 476 } 477 478 /* Returns a pointer to the clock source register for a peripheral */ 479 u32 *get_periph_source_reg(enum periph_id periph_id) 480 { 481 struct clk_rst_ctlr *clkrst = 482 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; 483 enum periphc_internal_id internal_id; 484 485 /* Coresight is a special case */ 486 if (periph_id == PERIPH_ID_CSI) 487 return &clkrst->crc_clk_src[PERIPH_ID_CSI+1]; 488 489 assert(periph_id >= PERIPH_ID_FIRST && periph_id < PERIPH_ID_COUNT); 490 internal_id = periph_id_to_internal_id[periph_id]; 491 assert(internal_id != -1); 492 if (internal_id >= PERIPHC_VW_FIRST) { 493 internal_id -= PERIPHC_VW_FIRST; 494 return &clkrst->crc_clk_src_vw[internal_id]; 495 } else 496 return &clkrst->crc_clk_src[internal_id]; 497 } 498 499 /** 500 * Given a peripheral ID and the required source clock, this returns which 501 * value should be programmed into the source mux for that peripheral. 502 * 503 * There is special code here to handle the one source type with 5 sources. 504 * 505 * @param periph_id peripheral to start 506 * @param source PLL id of required parent clock 507 * @param mux_bits Set to number of bits in mux register: 2 or 4 508 * @param divider_bits Set to number of divider bits (8 or 16) 509 * @return mux value (0-4, or -1 if not found) 510 */ 511 int get_periph_clock_source(enum periph_id periph_id, 512 enum clock_id parent, int *mux_bits, int *divider_bits) 513 { 514 enum clock_type_id type; 515 enum periphc_internal_id internal_id; 516 int mux; 517 518 assert(clock_periph_id_isvalid(periph_id)); 519 520 internal_id = periph_id_to_internal_id[periph_id]; 521 assert(periphc_internal_id_isvalid(internal_id)); 522 523 type = clock_periph_type[internal_id]; 524 assert(clock_type_id_isvalid(type)); 525 526 *mux_bits = clock_source[type][CLOCK_MAX_MUX]; 527 528 if (type == CLOCK_TYPE_PCMT16) 529 *divider_bits = 16; 530 else 531 *divider_bits = 8; 532 533 for (mux = 0; mux < CLOCK_MAX_MUX; mux++) 534 if (clock_source[type][mux] == parent) 535 return mux; 536 537 /* if we get here, either us or the caller has made a mistake */ 538 printf("Caller requested bad clock: periph=%d, parent=%d\n", periph_id, 539 parent); 540 return -1; 541 } 542 543 void clock_set_enable(enum periph_id periph_id, int enable) 544 { 545 struct clk_rst_ctlr *clkrst = 546 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; 547 u32 *clk; 548 u32 reg; 549 550 /* Enable/disable the clock to this peripheral */ 551 assert(clock_periph_id_isvalid(periph_id)); 552 if ((int)periph_id < (int)PERIPH_ID_VW_FIRST) 553 clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)]; 554 else 555 clk = &clkrst->crc_clk_out_enb_vw[PERIPH_REG(periph_id)]; 556 reg = readl(clk); 557 if (enable) 558 reg |= PERIPH_MASK(periph_id); 559 else 560 reg &= ~PERIPH_MASK(periph_id); 561 writel(reg, clk); 562 } 563 564 void reset_set_enable(enum periph_id periph_id, int enable) 565 { 566 struct clk_rst_ctlr *clkrst = 567 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; 568 u32 *reset; 569 u32 reg; 570 571 /* Enable/disable reset to the peripheral */ 572 assert(clock_periph_id_isvalid(periph_id)); 573 if (periph_id < PERIPH_ID_VW_FIRST) 574 reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)]; 575 else 576 reset = &clkrst->crc_rst_dev_vw[PERIPH_REG(periph_id)]; 577 reg = readl(reset); 578 if (enable) 579 reg |= PERIPH_MASK(periph_id); 580 else 581 reg &= ~PERIPH_MASK(periph_id); 582 writel(reg, reset); 583 } 584 585 #ifdef CONFIG_OF_CONTROL 586 /* 587 * Convert a device tree clock ID to our peripheral ID. They are mostly 588 * the same but we are very cautious so we check that a valid clock ID is 589 * provided. 590 * 591 * @param clk_id Clock ID according to tegra114 device tree binding 592 * @return peripheral ID, or PERIPH_ID_NONE if the clock ID is invalid 593 */ 594 enum periph_id clk_id_to_periph_id(int clk_id) 595 { 596 if (clk_id > PERIPH_ID_COUNT) 597 return PERIPH_ID_NONE; 598 599 switch (clk_id) { 600 case PERIPH_ID_RESERVED3: 601 case PERIPH_ID_RESERVED16: 602 case PERIPH_ID_RESERVED24: 603 case PERIPH_ID_RESERVED35: 604 case PERIPH_ID_RESERVED43: 605 case PERIPH_ID_RESERVED45: 606 case PERIPH_ID_RESERVED56: 607 case PERIPH_ID_RESERVED76: 608 case PERIPH_ID_RESERVED77: 609 case PERIPH_ID_RESERVED78: 610 case PERIPH_ID_RESERVED83: 611 case PERIPH_ID_RESERVED89: 612 case PERIPH_ID_RESERVED91: 613 case PERIPH_ID_RESERVED93: 614 case PERIPH_ID_RESERVED94: 615 case PERIPH_ID_RESERVED95: 616 return PERIPH_ID_NONE; 617 default: 618 return clk_id; 619 } 620 } 621 #endif /* CONFIG_OF_CONTROL */ 622 623 void clock_early_init(void) 624 { 625 struct clk_rst_ctlr *clkrst = 626 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; 627 struct clk_pll_info *pllinfo; 628 u32 data; 629 630 tegra30_set_up_pllp(); 631 632 /* 633 * PLLC output frequency set to 600Mhz 634 * PLLD output frequency set to 925Mhz 635 */ 636 switch (clock_get_osc_freq()) { 637 case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */ 638 clock_set_rate(CLOCK_ID_CGENERAL, 600, 12, 0, 8); 639 clock_set_rate(CLOCK_ID_DISPLAY, 925, 12, 0, 12); 640 break; 641 642 case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */ 643 clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8); 644 clock_set_rate(CLOCK_ID_DISPLAY, 925, 26, 0, 12); 645 break; 646 647 case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */ 648 clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8); 649 clock_set_rate(CLOCK_ID_DISPLAY, 925, 13, 0, 12); 650 break; 651 case CLOCK_OSC_FREQ_19_2: 652 default: 653 /* 654 * These are not supported. It is too early to print a 655 * message and the UART likely won't work anyway due to the 656 * oscillator being wrong. 657 */ 658 break; 659 } 660 661 /* PLLC_MISC2: Set dynramp_stepA/B. MISC2 maps to pll_out[1] */ 662 writel(0x00561600, &clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_out[1]); 663 664 /* PLLC_MISC: Set LOCK_ENABLE */ 665 pllinfo = &tegra_pll_info_table[CLOCK_ID_CGENERAL]; 666 setbits_le32(&clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_misc, (1 << pllinfo->lock_ena)); 667 udelay(2); 668 669 /* PLLD_MISC: Set CLKENABLE, CPCON 12, LFCON 1, and enable lock */ 670 pllinfo = &tegra_pll_info_table[CLOCK_ID_DISPLAY]; 671 data = (12 << pllinfo->kcp_shift) | (1 << pllinfo->kvco_shift); 672 data |= (1 << PLLD_CLKENABLE) | (1 << pllinfo->lock_ena); 673 writel(data, &clkrst->crc_pll[CLOCK_ID_DISPLAY].pll_misc); 674 udelay(2); 675 } 676 677 void arch_timer_init(void) 678 { 679 struct sysctr_ctlr *sysctr = (struct sysctr_ctlr *)NV_PA_TSC_BASE; 680 u32 freq, val; 681 682 freq = clock_get_rate(CLOCK_ID_OSC); 683 debug("%s: osc freq is %dHz [0x%08X]\n", __func__, freq, freq); 684 685 /* ARM CNTFRQ */ 686 asm("mcr p15, 0, %0, c14, c0, 0\n" : : "r" (freq)); 687 688 /* Only T114 has the System Counter regs */ 689 debug("%s: setting CNTFID0 to 0x%08X\n", __func__, freq); 690 writel(freq, &sysctr->cntfid0); 691 692 val = readl(&sysctr->cntcr); 693 val |= TSC_CNTCR_ENABLE | TSC_CNTCR_HDBG; 694 writel(val, &sysctr->cntcr); 695 debug("%s: TSC CNTCR = 0x%08X\n", __func__, val); 696 } 697