LXR uboot/arch/arm/mach-tegra/tegra20/clock.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2011 The Chromium OS Authors.
   4 * (C) Copyright 2010-2015
   5 * NVIDIA Corporation <www.nvidia.com>
   6 */
   7
   8/* Tegra20 Clock control functions */
   9
  10#include <common.h>
  11#include <errno.h>
  12#include <init.h>
  13#include <log.h>
  14#include <asm/io.h>
  15#include <asm/arch/clock.h>
  16#include <asm/arch/tegra.h>
  17#include <asm/arch-tegra/clk_rst.h>
  18#include <asm/arch-tegra/timer.h>
  19#include <div64.h>
  20#include <fdtdec.h>
  21#include <linux/delay.h>
  22
  23/*
  24 * Clock types that we can use as a source. The Tegra20 has muxes for the
  25 * peripheral clocks, and in most cases there are four options for the clock
  26 * source. This gives us a clock 'type' and exploits what commonality exists
  27 * in the device.
  28 *
  29 * Letters are obvious, except for T which means CLK_M, and S which means the
  30 * clock derived from 32KHz. Beware that CLK_M (also called OSC in the
  31 * datasheet) and PLL_M are different things. The former is the basic
  32 * clock supplied to the SOC from an external oscillator. The latter is the
  33 * memory clock PLL.
  34 *
  35 * See definitions in clock_id in the header file.
  36 */
  37enum clock_type_id {
  38        CLOCK_TYPE_AXPT,        /* PLL_A, PLL_X, PLL_P, CLK_M */
  39        CLOCK_TYPE_MCPA,        /* and so on */
  40        CLOCK_TYPE_MCPT,
  41        CLOCK_TYPE_PCM,
  42        CLOCK_TYPE_PCMT,
  43        CLOCK_TYPE_PCMT16,      /* CLOCK_TYPE_PCMT with 16-bit divider */
  44        CLOCK_TYPE_PCXTS,
  45        CLOCK_TYPE_PDCT,
  46
  47        CLOCK_TYPE_COUNT,
  48        CLOCK_TYPE_NONE = -1,   /* invalid clock type */
  49};
  50
  51enum {
  52        CLOCK_MAX_MUX   = 4     /* 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. Note that CLOCK_TYPE_PCXTS
  58 * is special as it has 5 sources. Since it also has a different number of
  59 * bits in its register for the source, we just handle it with a special
  60 * case in the code.
  61 */
  62#define CLK(x) CLOCK_ID_ ## x
  63static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX] = {
  64        { CLK(AUDIO),   CLK(XCPU),      CLK(PERIPH),    CLK(OSC)        },
  65        { CLK(MEMORY),  CLK(CGENERAL),  CLK(PERIPH),    CLK(AUDIO)      },
  66        { CLK(MEMORY),  CLK(CGENERAL),  CLK(PERIPH),    CLK(OSC)        },
  67        { CLK(PERIPH),  CLK(CGENERAL),  CLK(MEMORY),    CLK(NONE)       },
  68        { CLK(PERIPH),  CLK(CGENERAL),  CLK(MEMORY),    CLK(OSC)        },
  69        { CLK(PERIPH),  CLK(CGENERAL),  CLK(MEMORY),    CLK(OSC)        },
  70        { CLK(PERIPH),  CLK(CGENERAL),  CLK(XCPU),      CLK(OSC)        },
  71        { CLK(PERIPH),  CLK(DISPLAY),   CLK(CGENERAL),  CLK(OSC)        },
  72};
  73
  74/*
  75 * Clock peripheral IDs which sadly don't match up with PERIPH_ID. This is
  76 * not in the header file since it is for purely internal use - we want
  77 * callers to use the PERIPH_ID for all access to peripheral clocks to avoid
  78 * confusion bewteen PERIPH_ID_... and PERIPHC_...
  79 *
  80 * We don't call this CLOCK_PERIPH_ID or PERIPH_CLOCK_ID as it would just be
  81 * confusing.
  82 *
  83 * Note to SOC vendors: perhaps define a unified numbering for peripherals and
  84 * use it for reset, clock enable, clock source/divider and even pinmuxing
  85 * if you can.
  86 */
  87enum periphc_internal_id {
  88        /* 0x00 */
  89        PERIPHC_I2S1,
  90        PERIPHC_I2S2,
  91        PERIPHC_SPDIF_OUT,
  92        PERIPHC_SPDIF_IN,
  93        PERIPHC_PWM,
  94        PERIPHC_SPI1,
  95        PERIPHC_SPI2,
  96        PERIPHC_SPI3,
  97
  98        /* 0x08 */
  99        PERIPHC_XIO,
 100        PERIPHC_I2C1,
 101        PERIPHC_DVC_I2C,
 102        PERIPHC_TWC,
 103        PERIPHC_0c,
 104        PERIPHC_10,     /* PERIPHC_SPI1, what is this really? */
 105        PERIPHC_DISP1,
 106        PERIPHC_DISP2,
 107
 108        /* 0x10 */
 109        PERIPHC_CVE,
 110        PERIPHC_IDE0,
 111        PERIPHC_VI,
 112        PERIPHC_1c,
 113        PERIPHC_SDMMC1,
 114        PERIPHC_SDMMC2,
 115        PERIPHC_G3D,
 116        PERIPHC_G2D,
 117
 118        /* 0x18 */
 119        PERIPHC_NDFLASH,
 120        PERIPHC_SDMMC4,
 121        PERIPHC_VFIR,
 122        PERIPHC_EPP,
 123        PERIPHC_MPE,
 124        PERIPHC_MIPI,
 125        PERIPHC_UART1,
 126        PERIPHC_UART2,
 127
 128        /* 0x20 */
 129        PERIPHC_HOST1X,
 130        PERIPHC_21,
 131        PERIPHC_TVO,
 132        PERIPHC_HDMI,
 133        PERIPHC_24,
 134        PERIPHC_TVDAC,
 135        PERIPHC_I2C2,
 136        PERIPHC_EMC,
 137
 138        /* 0x28 */
 139        PERIPHC_UART3,
 140        PERIPHC_29,
 141        PERIPHC_VI_SENSOR,
 142        PERIPHC_2b,
 143        PERIPHC_2c,
 144        PERIPHC_SPI4,
 145        PERIPHC_I2C3,
 146        PERIPHC_SDMMC3,
 147
 148        /* 0x30 */
 149        PERIPHC_UART4,
 150        PERIPHC_UART5,
 151        PERIPHC_VDE,
 152        PERIPHC_OWR,
 153        PERIPHC_NOR,
 154        PERIPHC_CSITE,
 155
 156        PERIPHC_COUNT,
 157
 158        PERIPHC_NONE = -1,
 159};
 160
 161/*
 162 * Clock type for each peripheral clock source. We put the name in each
 163 * record just so it is easy to match things up
 164 */
 165#define TYPE(name, type) type
 166static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = {
 167        /* 0x00 */
 168        TYPE(PERIPHC_I2S1,      CLOCK_TYPE_AXPT),
 169        TYPE(PERIPHC_I2S2,      CLOCK_TYPE_AXPT),
 170        TYPE(PERIPHC_SPDIF_OUT, CLOCK_TYPE_AXPT),
 171        TYPE(PERIPHC_SPDIF_IN,  CLOCK_TYPE_PCM),
 172        TYPE(PERIPHC_PWM,       CLOCK_TYPE_PCXTS),
 173        TYPE(PERIPHC_SPI1,      CLOCK_TYPE_PCMT),
 174        TYPE(PERIPHC_SPI22,     CLOCK_TYPE_PCMT),
 175        TYPE(PERIPHC_SPI3,      CLOCK_TYPE_PCMT),
 176
 177        /* 0x08 */
 178        TYPE(PERIPHC_XIO,       CLOCK_TYPE_PCMT),
 179        TYPE(PERIPHC_I2C1,      CLOCK_TYPE_PCMT16),
 180        TYPE(PERIPHC_DVC_I2C,   CLOCK_TYPE_PCMT16),
 181        TYPE(PERIPHC_TWC,       CLOCK_TYPE_PCMT),
 182        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 183        TYPE(PERIPHC_SPI1,      CLOCK_TYPE_PCMT),
 184        TYPE(PERIPHC_DISP1,     CLOCK_TYPE_PDCT),
 185        TYPE(PERIPHC_DISP2,     CLOCK_TYPE_PDCT),
 186
 187        /* 0x10 */
 188        TYPE(PERIPHC_CVE,       CLOCK_TYPE_PDCT),
 189        TYPE(PERIPHC_IDE0,      CLOCK_TYPE_PCMT),
 190        TYPE(PERIPHC_VI,        CLOCK_TYPE_MCPA),
 191        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 192        TYPE(PERIPHC_SDMMC1,    CLOCK_TYPE_PCMT),
 193        TYPE(PERIPHC_SDMMC2,    CLOCK_TYPE_PCMT),
 194        TYPE(PERIPHC_G3D,       CLOCK_TYPE_MCPA),
 195        TYPE(PERIPHC_G2D,       CLOCK_TYPE_MCPA),
 196
 197        /* 0x18 */
 198        TYPE(PERIPHC_NDFLASH,   CLOCK_TYPE_PCMT),
 199        TYPE(PERIPHC_SDMMC4,    CLOCK_TYPE_PCMT),
 200        TYPE(PERIPHC_VFIR,      CLOCK_TYPE_PCMT),
 201        TYPE(PERIPHC_EPP,       CLOCK_TYPE_MCPA),
 202        TYPE(PERIPHC_MPE,       CLOCK_TYPE_MCPA),
 203        TYPE(PERIPHC_MIPI,      CLOCK_TYPE_PCMT),
 204        TYPE(PERIPHC_UART1,     CLOCK_TYPE_PCMT),
 205        TYPE(PERIPHC_UART2,     CLOCK_TYPE_PCMT),
 206
 207        /* 0x20 */
 208        TYPE(PERIPHC_HOST1X,    CLOCK_TYPE_MCPA),
 209        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 210        TYPE(PERIPHC_TVO,       CLOCK_TYPE_PDCT),
 211        TYPE(PERIPHC_HDMI,      CLOCK_TYPE_PDCT),
 212        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 213        TYPE(PERIPHC_TVDAC,     CLOCK_TYPE_PDCT),
 214        TYPE(PERIPHC_I2C2,      CLOCK_TYPE_PCMT16),
 215        TYPE(PERIPHC_EMC,       CLOCK_TYPE_MCPT),
 216
 217        /* 0x28 */
 218        TYPE(PERIPHC_UART3,     CLOCK_TYPE_PCMT),
 219        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 220        TYPE(PERIPHC_VI,        CLOCK_TYPE_MCPA),
 221        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 222        TYPE(PERIPHC_NONE,      CLOCK_TYPE_NONE),
 223        TYPE(PERIPHC_SPI4,      CLOCK_TYPE_PCMT),
 224        TYPE(PERIPHC_I2C3,      CLOCK_TYPE_PCMT16),
 225        TYPE(PERIPHC_SDMMC3,    CLOCK_TYPE_PCMT),
 226
 227        /* 0x30 */
 228        TYPE(PERIPHC_UART4,     CLOCK_TYPE_PCMT),
 229        TYPE(PERIPHC_UART5,     CLOCK_TYPE_PCMT),
 230        TYPE(PERIPHC_VDE,       CLOCK_TYPE_PCMT),
 231        TYPE(PERIPHC_OWR,       CLOCK_TYPE_PCMT),
 232        TYPE(PERIPHC_NOR,       CLOCK_TYPE_PCMT),
 233        TYPE(PERIPHC_CSITE,     CLOCK_TYPE_PCMT),
 234};
 235
 236/*
 237 * This array translates a periph_id to a periphc_internal_id
 238 *
 239 * Not present/matched up:
 240 *      uint vi_sensor;  _VI_SENSOR_0,          0x1A8
 241 *      SPDIF - which is both 0x08 and 0x0c
 242 *
 243 */
 244#define NONE(name) (-1)
 245#define OFFSET(name, value) PERIPHC_ ## name
 246static s8 periph_id_to_internal_id[PERIPH_ID_COUNT] = {
 247        /* Low word: 31:0 */
 248        NONE(CPU),
 249        NONE(RESERVED1),
 250        NONE(RESERVED2),
 251        NONE(AC97),
 252        NONE(RTC),
 253        NONE(TMR),
 254        PERIPHC_UART1,
 255        PERIPHC_UART2,  /* and vfir 0x68 */
 256
 257        /* 0x08 */
 258        NONE(GPIO),
 259        PERIPHC_SDMMC2,
 260        NONE(SPDIF),            /* 0x08 and 0x0c, unclear which to use */
 261        PERIPHC_I2S1,
 262        PERIPHC_I2C1,
 263        PERIPHC_NDFLASH,
 264        PERIPHC_SDMMC1,
 265        PERIPHC_SDMMC4,
 266
 267        /* 0x10 */
 268        PERIPHC_TWC,
 269        PERIPHC_PWM,
 270        PERIPHC_I2S2,
 271        PERIPHC_EPP,
 272        PERIPHC_VI,
 273        PERIPHC_G2D,
 274        NONE(USBD),
 275        NONE(ISP),
 276
 277        /* 0x18 */
 278        PERIPHC_G3D,
 279        PERIPHC_IDE0,
 280        PERIPHC_DISP2,
 281        PERIPHC_DISP1,
 282        PERIPHC_HOST1X,
 283        NONE(VCP),
 284        NONE(RESERVED30),
 285        NONE(CACHE2),
 286
 287        /* Middle word: 63:32 */
 288        NONE(MEM),
 289        NONE(AHBDMA),
 290        NONE(APBDMA),
 291        NONE(RESERVED35),
 292        NONE(KBC),
 293        NONE(STAT_MON),
 294        NONE(PMC),
 295        NONE(FUSE),
 296
 297        /* 0x28 */
 298        NONE(KFUSE),
 299        NONE(SBC1),     /* SBC1, 0x34, is this SPI1? */
 300        PERIPHC_NOR,
 301        PERIPHC_SPI1,
 302        PERIPHC_SPI2,
 303        PERIPHC_XIO,
 304        PERIPHC_SPI3,
 305        PERIPHC_DVC_I2C,
 306
 307        /* 0x30 */
 308        NONE(DSI),
 309        PERIPHC_TVO,    /* also CVE 0x40 */
 310        PERIPHC_MIPI,
 311        PERIPHC_HDMI,
 312        PERIPHC_CSITE,
 313        PERIPHC_TVDAC,
 314        PERIPHC_I2C2,
 315        PERIPHC_UART3,
 316
 317        /* 0x38 */
 318        NONE(RESERVED56),
 319        PERIPHC_EMC,
 320        NONE(USB2),
 321        NONE(USB3),
 322        PERIPHC_MPE,
 323        PERIPHC_VDE,
 324        NONE(BSEA),
 325        NONE(BSEV),
 326
 327        /* Upper word 95:64 */
 328        NONE(SPEEDO),
 329        PERIPHC_UART4,
 330        PERIPHC_UART5,
 331        PERIPHC_I2C3,
 332        PERIPHC_SPI4,
 333        PERIPHC_SDMMC3,
 334        NONE(PCIE),
 335        PERIPHC_OWR,
 336
 337        /* 0x48 */
 338        NONE(AFI),
 339        NONE(CORESIGHT),
 340        NONE(PCIEXCLK),
 341        NONE(AVPUCQ),
 342        NONE(RESERVED76),
 343        NONE(RESERVED77),
 344        NONE(RESERVED78),
 345        NONE(RESERVED79),
 346
 347        /* 0x50 */
 348        NONE(RESERVED80),
 349        NONE(RESERVED81),
 350        NONE(RESERVED82),
 351        NONE(RESERVED83),
 352        NONE(IRAMA),
 353        NONE(IRAMB),
 354        NONE(IRAMC),
 355        NONE(IRAMD),
 356
 357        /* 0x58 */
 358        NONE(CRAM2),
 359};
 360
 361/*
 362 * PLL divider shift/mask tables for all PLL IDs.
 363 */
 364struct clk_pll_info tegra_pll_info_table[CLOCK_ID_PLL_COUNT] = {
 365        /*
 366         * T20 and T25
 367         * NOTE: If kcp_mask/kvco_mask == 0, they're not used in that PLL (PLLX, etc.)
 368         *       If lock_ena or lock_det are >31, they're not used in that PLL.
 369         */
 370
 371        { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0x3FF,  .p_shift = 20, .p_mask = 0x0F,
 372          .lock_ena = 24, .lock_det = 27, .kcp_shift = 28, .kcp_mask = 3, .kvco_shift = 27, .kvco_mask = 1 },   /* PLLC */
 373        { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0x3FF,  .p_shift = 0,  .p_mask = 0,
 374          .lock_ena = 0,  .lock_det = 27, .kcp_shift = 1, .kcp_mask = 3, .kvco_shift = 0, .kvco_mask = 1 },     /* PLLM */
 375        { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07,
 376          .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLP */
 377        { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07,
 378          .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLA */
 379        { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x01,
 380          .lock_ena = 22, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLU */
 381        { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07,
 382          .lock_ena = 22, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLD */
 383        { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF,  .p_shift = 20, .p_mask = 0x0F,
 384          .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 0, .kvco_mask = 0 },   /* PLLX */
 385        { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0xFF,  .p_shift = 0,  .p_mask = 0,
 386          .lock_ena = 9,  .lock_det = 11, .kcp_shift = 6, .kcp_mask = 3, .kvco_shift = 0, .kvco_mask = 1 },     /* PLLE */
 387        { .m_shift = 0, .m_mask = 0x0F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07,
 388          .lock_ena = 18, .lock_det = 0, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF },  /* PLLS */
 389};
 390
 391/*
 392 * Get the oscillator frequency, from the corresponding hardware configuration
 393 * field. T20 has 4 frequencies that it supports.
 394 */
 395enum clock_osc_freq clock_get_osc_freq(void)
 396{
 397        struct clk_rst_ctlr *clkrst =
 398                        (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
 399        u32 reg;
 400
 401        reg = readl(&clkrst->crc_osc_ctrl);
 402        return (reg & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT;
 403}
 404
 405/* Returns a pointer to the clock source register for a peripheral */
 406u32 *get_periph_source_reg(enum periph_id periph_id)
 407{
 408        struct clk_rst_ctlr *clkrst =
 409                        (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
 410        enum periphc_internal_id internal_id;
 411
 412        assert(clock_periph_id_isvalid(periph_id));
 413        internal_id = periph_id_to_internal_id[periph_id];
 414        assert(internal_id != -1);
 415        return &clkrst->crc_clk_src[internal_id];
 416}
 417
 418int get_periph_clock_info(enum periph_id periph_id, int *mux_bits,
 419                          int *divider_bits, int *type)
 420{
 421        enum periphc_internal_id internal_id;
 422
 423        if (!clock_periph_id_isvalid(periph_id))
 424                return -1;
 425
 426        internal_id = periph_id_to_internal_id[periph_id];
 427        if (!periphc_internal_id_isvalid(internal_id))
 428                return -1;
 429
 430        *type = clock_periph_type[internal_id];
 431        if (!clock_type_id_isvalid(*type))
 432                return -1;
 433
 434        /*
 435         * Special cases here for the clock with a 4-bit source mux and I2C
 436         * with its 16-bit divisor
 437         */
 438        if (*type == CLOCK_TYPE_PCXTS)
 439                *mux_bits = MASK_BITS_31_28;
 440        else
 441                *mux_bits = MASK_BITS_31_30;
 442        if (*type == CLOCK_TYPE_PCMT16)
 443                *divider_bits = 16;
 444        else
 445                *divider_bits = 8;
 446
 447        return 0;
 448}
 449
 450enum clock_id get_periph_clock_id(enum periph_id periph_id, int source)
 451{
 452        enum periphc_internal_id internal_id;
 453        int type;
 454
 455        if (!clock_periph_id_isvalid(periph_id))
 456                return CLOCK_ID_NONE;
 457
 458        internal_id = periph_id_to_internal_id[periph_id];
 459        if (!periphc_internal_id_isvalid(internal_id))
 460                return CLOCK_ID_NONE;
 461
 462        type = clock_periph_type[internal_id];
 463        if (!clock_type_id_isvalid(type))
 464                return CLOCK_ID_NONE;
 465
 466        return clock_source[type][source];
 467}
 468
 469/**
 470 * Given a peripheral ID and the required source clock, this returns which
 471 * value should be programmed into the source mux for that peripheral.
 472 *
 473 * There is special code here to handle the one source type with 5 sources.
 474 *
 475 * @param periph_id     peripheral to start
 476 * @param source        PLL id of required parent clock
 477 * @param mux_bits      Set to number of bits in mux register: 2 or 4
 478 * @param divider_bits  Set to number of divider bits (8 or 16)
 479 * @return mux value (0-4, or -1 if not found)
 480 */
 481int get_periph_clock_source(enum periph_id periph_id,
 482                enum clock_id parent, int *mux_bits, int *divider_bits)
 483{
 484        enum clock_type_id type;
 485        int mux, err;
 486
 487        err = get_periph_clock_info(periph_id, mux_bits, divider_bits, &type);
 488        assert(!err);
 489
 490        for (mux = 0; mux < CLOCK_MAX_MUX; mux++)
 491                if (clock_source[type][mux] == parent)
 492                        return mux;
 493
 494        /*
 495         * Not found: it might be looking for the 'S' in CLOCK_TYPE_PCXTS
 496         * which is not in our table. If not, then they are asking for a
 497         * source which this peripheral can't access through its mux.
 498         */
 499        assert(type == CLOCK_TYPE_PCXTS);
 500        assert(parent == CLOCK_ID_SFROM32KHZ);
 501        if (type == CLOCK_TYPE_PCXTS && parent == CLOCK_ID_SFROM32KHZ)
 502                return 4;       /* mux value for this clock */
 503
 504        /* if we get here, either us or the caller has made a mistake */
 505        printf("Caller requested bad clock: periph=%d, parent=%d\n", periph_id,
 506                parent);
 507        return -1;
 508}
 509
 510void clock_set_enable(enum periph_id periph_id, int enable)
 511{
 512        struct clk_rst_ctlr *clkrst =
 513                        (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
 514        u32 *clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)];
 515        u32 reg;
 516
 517        /* Enable/disable the clock to this peripheral */
 518        assert(clock_periph_id_isvalid(periph_id));
 519        reg = readl(clk);
 520        if (enable)
 521                reg |= PERIPH_MASK(periph_id);
 522        else
 523                reg &= ~PERIPH_MASK(periph_id);
 524        writel(reg, clk);
 525}
 526
 527void reset_set_enable(enum periph_id periph_id, int enable)
 528{
 529        struct clk_rst_ctlr *clkrst =
 530                        (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
 531        u32 *reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)];
 532        u32 reg;
 533
 534        /* Enable/disable reset to the peripheral */
 535        assert(clock_periph_id_isvalid(periph_id));
 536        reg = readl(reset);
 537        if (enable)
 538                reg |= PERIPH_MASK(periph_id);
 539        else
 540                reg &= ~PERIPH_MASK(periph_id);
 541        writel(reg, reset);
 542}
 543
 544#if CONFIG_IS_ENABLED(OF_CONTROL)
 545/*
 546 * Convert a device tree clock ID to our peripheral ID. They are mostly
 547 * the same but we are very cautious so we check that a valid clock ID is
 548 * provided.
 549 *
 550 * @param clk_id        Clock ID according to tegra20 device tree binding
 551 * @return peripheral ID, or PERIPH_ID_NONE if the clock ID is invalid
 552 */
 553enum periph_id clk_id_to_periph_id(int clk_id)
 554{
 555        if (clk_id > PERIPH_ID_COUNT)
 556                return PERIPH_ID_NONE;
 557
 558        switch (clk_id) {
 559        case PERIPH_ID_RESERVED1:
 560        case PERIPH_ID_RESERVED2:
 561        case PERIPH_ID_RESERVED30:
 562        case PERIPH_ID_RESERVED35:
 563        case PERIPH_ID_RESERVED56:
 564        case PERIPH_ID_PCIEXCLK:
 565        case PERIPH_ID_RESERVED76:
 566        case PERIPH_ID_RESERVED77:
 567        case PERIPH_ID_RESERVED78:
 568        case PERIPH_ID_RESERVED79:
 569        case PERIPH_ID_RESERVED80:
 570        case PERIPH_ID_RESERVED81:
 571        case PERIPH_ID_RESERVED82:
 572        case PERIPH_ID_RESERVED83:
 573        case PERIPH_ID_RESERVED91:
 574                return PERIPH_ID_NONE;
 575        default:
 576                return clk_id;
 577        }
 578}
 579#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
 580
 581void clock_early_init(void)
 582{
 583        /*
 584         * PLLP output frequency set to 216MHz
 585         * PLLC output frequency set to 600Mhz
 586         *
 587         * TODO: Can we calculate these values instead of hard-coding?
 588         */
 589        switch (clock_get_osc_freq()) {
 590        case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
 591                clock_set_rate(CLOCK_ID_PERIPH, 432, 12, 1, 8);
 592                clock_set_rate(CLOCK_ID_CGENERAL, 600, 12, 0, 8);
 593                break;
 594
 595        case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
 596                clock_set_rate(CLOCK_ID_PERIPH, 432, 26, 1, 8);
 597                clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8);
 598                break;
 599
 600        case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */
 601                clock_set_rate(CLOCK_ID_PERIPH, 432, 13, 1, 8);
 602                clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8);
 603                break;
 604        case CLOCK_OSC_FREQ_19_2:
 605        default:
 606                /*
 607                 * These are not supported. It is too early to print a
 608                 * message and the UART likely won't work anyway due to the
 609                 * oscillator being wrong.
 610                 */
 611                break;
 612        }
 613}
 614
 615void arch_timer_init(void)
 616{
 617}
 618
 619#define PMC_SATA_PWRGT 0x1ac
 620#define  PMC_SATA_PWRGT_PLLE_IDDQ_OVERRIDE (1 << 5)
 621#define  PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL (1 << 4)
 622
 623#define PLLE_SS_CNTL 0x68
 624#define  PLLE_SS_CNTL_SSCINCINTRV(x) (((x) & 0x3f) << 24)
 625#define  PLLE_SS_CNTL_SSCINC(x) (((x) & 0xff) << 16)
 626#define  PLLE_SS_CNTL_SSCBYP (1 << 12)
 627#define  PLLE_SS_CNTL_INTERP_RESET (1 << 11)
 628#define  PLLE_SS_CNTL_BYPASS_SS (1 << 10)
 629#define  PLLE_SS_CNTL_SSCMAX(x) (((x) & 0x1ff) << 0)
 630
 631#define PLLE_BASE 0x0e8
 632#define  PLLE_BASE_ENABLE_CML (1 << 31)
 633#define  PLLE_BASE_ENABLE (1 << 30)
 634#define  PLLE_BASE_PLDIV_CML(x) (((x) & 0xf) << 24)
 635#define  PLLE_BASE_PLDIV(x) (((x) & 0x3f) << 16)
 636#define  PLLE_BASE_NDIV(x) (((x) & 0xff) << 8)
 637#define  PLLE_BASE_MDIV(x) (((x) & 0xff) << 0)
 638
 639#define PLLE_MISC 0x0ec
 640#define  PLLE_MISC_SETUP_BASE(x) (((x) & 0xffff) << 16)
 641#define  PLLE_MISC_PLL_READY (1 << 15)
 642#define  PLLE_MISC_LOCK (1 << 11)
 643#define  PLLE_MISC_LOCK_ENABLE (1 << 9)
 644#define  PLLE_MISC_SETUP_EXT(x) (((x) & 0x3) << 2)
 645
 646static int tegra_plle_train(void)
 647{
 648        unsigned int timeout = 2000;
 649        unsigned long value;
 650
 651        value = readl(NV_PA_PMC_BASE + PMC_SATA_PWRGT);
 652        value |= PMC_SATA_PWRGT_PLLE_IDDQ_OVERRIDE;
 653        writel(value, NV_PA_PMC_BASE + PMC_SATA_PWRGT);
 654
 655        value = readl(NV_PA_PMC_BASE + PMC_SATA_PWRGT);
 656        value |= PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL;
 657        writel(value, NV_PA_PMC_BASE + PMC_SATA_PWRGT);
 658
 659        value = readl(NV_PA_PMC_BASE + PMC_SATA_PWRGT);
 660        value &= ~PMC_SATA_PWRGT_PLLE_IDDQ_OVERRIDE;
 661        writel(value, NV_PA_PMC_BASE + PMC_SATA_PWRGT);
 662
 663        do {
 664                value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC);
 665                if (value & PLLE_MISC_PLL_READY)
 666                        break;
 667
 668                udelay(100);
 669        } while (--timeout);
 670
 671        if (timeout == 0) {
 672                pr_err("timeout waiting for PLLE to become ready");
 673                return -ETIMEDOUT;
 674        }
 675
 676        return 0;
 677}
 678
 679int tegra_plle_enable(void)
 680{
 681        unsigned int timeout = 1000;
 682        u32 value;
 683        int err;
 684
 685        /* disable PLLE clock */
 686        value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE);
 687        value &= ~PLLE_BASE_ENABLE_CML;
 688        value &= ~PLLE_BASE_ENABLE;
 689        writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE);
 690
 691        /* clear lock enable and setup field */
 692        value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC);
 693        value &= ~PLLE_MISC_LOCK_ENABLE;
 694        value &= ~PLLE_MISC_SETUP_BASE(0xffff);
 695        value &= ~PLLE_MISC_SETUP_EXT(0x3);
 696        writel(value, NV_PA_CLK_RST_BASE + PLLE_MISC);
 697
 698        value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC);
 699        if ((value & PLLE_MISC_PLL_READY) == 0) {
 700                err = tegra_plle_train();
 701                if (err < 0) {
 702                        pr_err("failed to train PLLE: %d", err);
 703                        return err;
 704                }
 705        }
 706
 707        value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC);
 708        value |= PLLE_MISC_SETUP_BASE(0x7);
 709        value |= PLLE_MISC_LOCK_ENABLE;
 710        value |= PLLE_MISC_SETUP_EXT(0);
 711        writel(value, NV_PA_CLK_RST_BASE + PLLE_MISC);
 712
 713        value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
 714        value |= PLLE_SS_CNTL_SSCBYP | PLLE_SS_CNTL_INTERP_RESET |
 715                 PLLE_SS_CNTL_BYPASS_SS;
 716        writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
 717
 718        value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE);
 719        value |= PLLE_BASE_ENABLE_CML | PLLE_BASE_ENABLE;
 720        writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE);
 721
 722        do {
 723                value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC);
 724                if (value & PLLE_MISC_LOCK)
 725                        break;
 726
 727                udelay(2);
 728        } while (--timeout);
 729
 730        if (timeout == 0) {
 731                pr_err("timeout waiting for PLLE to lock");
 732                return -ETIMEDOUT;
 733        }
 734
 735        udelay(50);
 736
 737        value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
 738        value &= ~PLLE_SS_CNTL_SSCINCINTRV(0x3f);
 739        value |= PLLE_SS_CNTL_SSCINCINTRV(0x18);
 740
 741        value &= ~PLLE_SS_CNTL_SSCINC(0xff);
 742        value |= PLLE_SS_CNTL_SSCINC(0x01);
 743
 744        value &= ~PLLE_SS_CNTL_SSCBYP;
 745        value &= ~PLLE_SS_CNTL_INTERP_RESET;
 746        value &= ~PLLE_SS_CNTL_BYPASS_SS;
 747
 748        value &= ~PLLE_SS_CNTL_SSCMAX(0x1ff);
 749        value |= PLLE_SS_CNTL_SSCMAX(0x24);
 750        writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL);
 751
 752        return 0;
 753}
 754
 755struct periph_clk_init periph_clk_init_table[] = {
 756        { PERIPH_ID_SPI1, CLOCK_ID_PERIPH },
 757        { PERIPH_ID_SBC1, CLOCK_ID_PERIPH },
 758        { PERIPH_ID_SBC2, CLOCK_ID_PERIPH },
 759        { PERIPH_ID_SBC3, CLOCK_ID_PERIPH },
 760        { PERIPH_ID_SBC4, CLOCK_ID_PERIPH },
 761        { PERIPH_ID_HOST1X, CLOCK_ID_PERIPH },
 762        { PERIPH_ID_DISP1, CLOCK_ID_CGENERAL },
 763        { PERIPH_ID_NDFLASH, CLOCK_ID_PERIPH },
 764        { PERIPH_ID_SDMMC1, CLOCK_ID_PERIPH },
 765        { PERIPH_ID_SDMMC2, CLOCK_ID_PERIPH },
 766        { PERIPH_ID_SDMMC3, CLOCK_ID_PERIPH },
 767        { PERIPH_ID_SDMMC4, CLOCK_ID_PERIPH },
 768        { PERIPH_ID_PWM, CLOCK_ID_SFROM32KHZ },
 769        { PERIPH_ID_DVC_I2C, CLOCK_ID_PERIPH },
 770        { PERIPH_ID_I2C1, CLOCK_ID_PERIPH },
 771        { PERIPH_ID_I2C2, CLOCK_ID_PERIPH },
 772        { PERIPH_ID_I2C3, CLOCK_ID_PERIPH },
 773        { -1, },
 774};
 775