drivers/clk/rockchip/clk_rk3288.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) Copyright 2015 Google, Inc
   4  */
   5
   6 #include <common.h>
   7 #include <bitfield.h>
   8 #include <clk-uclass.h>
   9 #include <dm.h>
  10 #include <dt-structs.h>
  11 #include <errno.h>
  12 #include <mapmem.h>
  13 #include <syscon.h>
  14 #include <asm/io.h>
  15 #include <asm/arch/clock.h>
  16 #include <asm/arch/cru_rk3288.h>
  17 #include <asm/arch/grf_rk3288.h>
  18 #include <asm/arch/hardware.h>
  19 #include <dt-bindings/clock/rk3288-cru.h>
  20 #include <dm/device-internal.h>
  21 #include <dm/lists.h>
  22 #include <dm/uclass-internal.h>
  23 #include <linux/log2.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 struct rk3288_clk_plat {
  28 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  29         struct dtd_rockchip_rk3288_cru dtd;
  30 #endif
  31 };
  32
  33 struct pll_div {
  34         u32 nr;
  35         u32 nf;
  36         u32 no;
  37 };
  38
  39 enum {
  40         VCO_MAX_HZ      = 2200U * 1000000,
  41         VCO_MIN_HZ      = 440 * 1000000,
  42         OUTPUT_MAX_HZ   = 2200U * 1000000,
  43         OUTPUT_MIN_HZ   = 27500000,
  44         FREF_MAX_HZ     = 2200U * 1000000,
  45         FREF_MIN_HZ     = 269 * 1000,
  46 };
  47
  48 enum {
  49         /* PLL CON0 */
  50         PLL_OD_MASK             = 0x0f,
  51
  52         /* PLL CON1 */
  53         PLL_NF_MASK             = 0x1fff,
  54
  55         /* PLL CON2 */
  56         PLL_BWADJ_MASK          = 0x0fff,
  57
  58         /* PLL CON3 */
  59         PLL_RESET_SHIFT         = 5,
  60
  61         /* CLKSEL0 */
  62         CORE_SEL_PLL_SHIFT      = 15,
  63         CORE_SEL_PLL_MASK       = 1 << CORE_SEL_PLL_SHIFT,
  64         A17_DIV_SHIFT           = 8,
  65         A17_DIV_MASK            = 0x1f << A17_DIV_SHIFT,
  66         MP_DIV_SHIFT            = 4,
  67         MP_DIV_MASK             = 0xf << MP_DIV_SHIFT,
  68         M0_DIV_SHIFT            = 0,
  69         M0_DIV_MASK             = 0xf << M0_DIV_SHIFT,
  70
  71         /* CLKSEL1: pd bus clk pll sel: codec or general */
  72         PD_BUS_SEL_PLL_MASK     = 15,
  73         PD_BUS_SEL_CPLL         = 0,
  74         PD_BUS_SEL_GPLL,
  75
  76         /* pd bus pclk div: pclk = pd_bus_aclk /(div + 1) */
  77         PD_BUS_PCLK_DIV_SHIFT   = 12,
  78         PD_BUS_PCLK_DIV_MASK    = 7 << PD_BUS_PCLK_DIV_SHIFT,
  79
  80         /* pd bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */
  81         PD_BUS_HCLK_DIV_SHIFT   = 8,
  82         PD_BUS_HCLK_DIV_MASK    = 3 << PD_BUS_HCLK_DIV_SHIFT,
  83
  84         /* pd bus aclk div: pd_bus_aclk = pd_bus_src_clk /(div0 * div1) */
  85         PD_BUS_ACLK_DIV0_SHIFT  = 3,
  86         PD_BUS_ACLK_DIV0_MASK   = 0x1f << PD_BUS_ACLK_DIV0_SHIFT,
  87         PD_BUS_ACLK_DIV1_SHIFT  = 0,
  88         PD_BUS_ACLK_DIV1_MASK   = 0x7 << PD_BUS_ACLK_DIV1_SHIFT,
  89
  90         /*
  91          * CLKSEL10
  92          * peripheral bus pclk div:
  93          * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1
  94          */
  95         PERI_SEL_PLL_SHIFT       = 15,
  96         PERI_SEL_PLL_MASK        = 1 << PERI_SEL_PLL_SHIFT,
  97         PERI_SEL_CPLL           = 0,
  98         PERI_SEL_GPLL,
  99
 100         PERI_PCLK_DIV_SHIFT     = 12,
 101         PERI_PCLK_DIV_MASK      = 3 << PERI_PCLK_DIV_SHIFT,
 102
 103         /* peripheral bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */
 104         PERI_HCLK_DIV_SHIFT     = 8,
 105         PERI_HCLK_DIV_MASK      = 3 << PERI_HCLK_DIV_SHIFT,
 106
 107         /*
 108          * peripheral bus aclk div:
 109          *    aclk_periph = periph_clk_src / (peri_aclk_div_con + 1)
 110          */
 111         PERI_ACLK_DIV_SHIFT     = 0,
 112         PERI_ACLK_DIV_MASK      = 0x1f << PERI_ACLK_DIV_SHIFT,
 113
 114         /*
 115          * CLKSEL24
 116          * saradc_div_con:
 117          * clk_saradc=24MHz/(saradc_div_con+1)
 118          */
 119         CLK_SARADC_DIV_CON_SHIFT        = 8,
 120         CLK_SARADC_DIV_CON_MASK         = GENMASK(15, 8),
 121         CLK_SARADC_DIV_CON_WIDTH        = 8,
 122
 123         SOCSTS_DPLL_LOCK        = 1 << 5,
 124         SOCSTS_APLL_LOCK        = 1 << 6,
 125         SOCSTS_CPLL_LOCK        = 1 << 7,
 126         SOCSTS_GPLL_LOCK        = 1 << 8,
 127         SOCSTS_NPLL_LOCK        = 1 << 9,
 128 };
 129
 130 #define DIV_TO_RATE(input_rate, div)    ((input_rate) / ((div) + 1))
 131
 132 #define PLL_DIVISORS(hz, _nr, _no) {\
 133         .nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\
 134         _Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\
 135                        (_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\
 136                        "divisors on line " __stringify(__LINE__));
 137
 138 /* Keep divisors as low as possible to reduce jitter and power usage */
 139 static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1);
 140 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
 141 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
 142
 143 static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id,
 144                          const struct pll_div *div)
 145 {
 146         int pll_id = rk_pll_id(clk_id);
 147         struct rk3288_pll *pll = &cru->pll[pll_id];
 148         /* All PLLs have same VCO and output frequency range restrictions. */
 149         uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000;
 150         uint output_hz = vco_hz / div->no;
 151
 152         debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n",
 153               (uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz);
 154         assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
 155                output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ &&
 156                (div->no == 1 || !(div->no % 2)));
 157
 158         /* enter reset */
 159         rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT);
 160
 161         rk_clrsetreg(&pll->con0, CLKR_MASK | PLL_OD_MASK,
 162                      ((div->nr - 1) << CLKR_SHIFT) | (div->no - 1));
 163         rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1);
 164         rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1);
 165
 166         udelay(10);
 167
 168         /* return from reset */
 169         rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT);
 170
 171         return 0;
 172 }
 173
 174 static int rkclk_configure_ddr(struct rk3288_cru *cru, struct rk3288_grf *grf,
 175                                unsigned int hz)
 176 {
 177         static const struct pll_div dpll_cfg[] = {
 178                 {.nf = 25, .nr = 2, .no = 1},
 179                 {.nf = 400, .nr = 9, .no = 2},
 180                 {.nf = 500, .nr = 9, .no = 2},
 181                 {.nf = 100, .nr = 3, .no = 1},
 182         };
 183         int cfg;
 184
 185         switch (hz) {
 186         case 300000000:
 187                 cfg = 0;
 188                 break;
 189         case 533000000: /* actually 533.3P MHz */
 190                 cfg = 1;
 191                 break;
 192         case 666000000: /* actually 666.6P MHz */
 193                 cfg = 2;
 194                 break;
 195         case 800000000:
 196                 cfg = 3;
 197                 break;
 198         default:
 199                 debug("Unsupported SDRAM frequency");
 200                 return -EINVAL;
 201         }
 202
 203         /* pll enter slow-mode */
 204         rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK,
 205                      DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
 206
 207         rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg]);
 208
 209         /* wait for pll lock */
 210         while (!(readl(&grf->soc_status[1]) & SOCSTS_DPLL_LOCK))
 211                 udelay(1);
 212
 213         /* PLL enter normal-mode */
 214         rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK,
 215                      DPLL_MODE_NORMAL << DPLL_MODE_SHIFT);
 216
 217         return 0;
 218 }
 219
 220 #ifndef CONFIG_SPL_BUILD
 221 #define VCO_MAX_KHZ     2200000
 222 #define VCO_MIN_KHZ     440000
 223 #define FREF_MAX_KHZ    2200000
 224 #define FREF_MIN_KHZ    269
 225
 226 static int pll_para_config(ulong freq_hz, struct pll_div *div, uint *ext_div)
 227 {
 228         uint ref_khz = OSC_HZ / 1000, nr, nf = 0;
 229         uint fref_khz;
 230         uint diff_khz, best_diff_khz;
 231         const uint max_nr = 1 << 6, max_nf = 1 << 12, max_no = 1 << 4;
 232         uint vco_khz;
 233         uint no = 1;
 234         uint freq_khz = freq_hz / 1000;
 235
 236         if (!freq_hz) {
 237                 printf("%s: the frequency can not be 0 Hz\n", __func__);
 238                 return -EINVAL;
 239         }
 240
 241         no = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz);
 242         if (ext_div) {
 243                 *ext_div = DIV_ROUND_UP(no, max_no);
 244                 no = DIV_ROUND_UP(no, *ext_div);
 245         }
 246
 247         /* only even divisors (and 1) are supported */
 248         if (no > 1)
 249                 no = DIV_ROUND_UP(no, 2) * 2;
 250
 251         vco_khz = freq_khz * no;
 252         if (ext_div)
 253                 vco_khz *= *ext_div;
 254
 255         if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) {
 256                 printf("%s: Cannot find out a supported VCO for Frequency (%luHz).\n",
 257                        __func__, freq_hz);
 258                 return -1;
 259         }
 260
 261         div->no = no;
 262
 263         best_diff_khz = vco_khz;
 264         for (nr = 1; nr < max_nr && best_diff_khz; nr++) {
 265                 fref_khz = ref_khz / nr;
 266                 if (fref_khz < FREF_MIN_KHZ)
 267                         break;
 268                 if (fref_khz > FREF_MAX_KHZ)
 269                         continue;
 270
 271                 nf = vco_khz / fref_khz;
 272                 if (nf >= max_nf)
 273                         continue;
 274                 diff_khz = vco_khz - nf * fref_khz;
 275                 if (nf + 1 < max_nf && diff_khz > fref_khz / 2) {
 276                         nf++;
 277                         diff_khz = fref_khz - diff_khz;
 278                 }
 279
 280                 if (diff_khz >= best_diff_khz)
 281                         continue;
 282
 283                 best_diff_khz = diff_khz;
 284                 div->nr = nr;
 285                 div->nf = nf;
 286         }
 287
 288         if (best_diff_khz > 4 * 1000) {
 289                 printf("%s: Failed to match output frequency %lu, difference is %u Hz, exceed 4MHZ\n",
 290                        __func__, freq_hz, best_diff_khz * 1000);
 291                 return -EINVAL;
 292         }
 293
 294         return 0;
 295 }
 296
 297 static int rockchip_mac_set_clk(struct rk3288_cru *cru, uint freq)
 298 {
 299         ulong ret;
 300
 301         /*
 302          * The gmac clock can be derived either from an external clock
 303          * or can be generated from internally by a divider from SCLK_MAC.
 304          */
 305         if (readl(&cru->cru_clksel_con[21]) & RMII_EXTCLK_MASK) {
 306                 /* An external clock will always generate the right rate... */
 307                 ret = freq;
 308         } else {
 309                 u32 con = readl(&cru->cru_clksel_con[21]);
 310                 ulong pll_rate;
 311                 u8 div;
 312
 313                 if (((con >> EMAC_PLL_SHIFT) & EMAC_PLL_MASK) ==
 314                     EMAC_PLL_SELECT_GENERAL)
 315                         pll_rate = GPLL_HZ;
 316                 else if (((con >> EMAC_PLL_SHIFT) & EMAC_PLL_MASK) ==
 317                          EMAC_PLL_SELECT_CODEC)
 318                         pll_rate = CPLL_HZ;
 319                 else
 320                         pll_rate = NPLL_HZ;
 321
 322                 div = DIV_ROUND_UP(pll_rate, freq) - 1;
 323                 if (div <= 0x1f)
 324                         rk_clrsetreg(&cru->cru_clksel_con[21], MAC_DIV_CON_MASK,
 325                                      div << MAC_DIV_CON_SHIFT);
 326                 else
 327                         debug("Unsupported div for gmac:%d\n", div);
 328
 329                 return DIV_TO_RATE(pll_rate, div);
 330         }
 331
 332         return ret;
 333 }
 334
 335 static int rockchip_vop_set_clk(struct rk3288_cru *cru, struct rk3288_grf *grf,
 336                                 int periph, unsigned int rate_hz)
 337 {
 338         struct pll_div npll_config = {0};
 339         u32 lcdc_div;
 340         int ret;
 341
 342         ret = pll_para_config(rate_hz, &npll_config, &lcdc_div);
 343         if (ret)
 344                 return ret;
 345
 346         rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK,
 347                      NPLL_MODE_SLOW << NPLL_MODE_SHIFT);
 348         rkclk_set_pll(cru, CLK_NEW, &npll_config);
 349
 350         /* waiting for pll lock */
 351         while (1) {
 352                 if (readl(&grf->soc_status[1]) & SOCSTS_NPLL_LOCK)
 353                         break;
 354                 udelay(1);
 355         }
 356
 357         rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK,
 358                      NPLL_MODE_NORMAL << NPLL_MODE_SHIFT);
 359
 360         /* vop dclk source clk: npll,dclk_div: 1 */
 361         switch (periph) {
 362         case DCLK_VOP0:
 363                 rk_clrsetreg(&cru->cru_clksel_con[27], 0xff << 8 | 3 << 0,
 364                              (lcdc_div - 1) << 8 | 2 << 0);
 365                 break;
 366         case DCLK_VOP1:
 367                 rk_clrsetreg(&cru->cru_clksel_con[29], 0xff << 8 | 3 << 6,
 368                              (lcdc_div - 1) << 8 | 2 << 6);
 369                 break;
 370         }
 371
 372         return 0;
 373 }
 374 #endif /* CONFIG_SPL_BUILD */
 375
 376 static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf)
 377 {
 378         u32 aclk_div;
 379         u32 hclk_div;
 380         u32 pclk_div;
 381
 382         /* pll enter slow-mode */
 383         rk_clrsetreg(&cru->cru_mode_con,
 384                      GPLL_MODE_MASK | CPLL_MODE_MASK,
 385                      GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
 386                      CPLL_MODE_SLOW << CPLL_MODE_SHIFT);
 387
 388         /* init pll */
 389         rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
 390         rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg);
 391
 392         /* waiting for pll lock */
 393         while ((readl(&grf->soc_status[1]) &
 394                         (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) !=
 395                         (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK))
 396                 udelay(1);
 397
 398         /*
 399          * pd_bus clock pll source selection and
 400          * set up dependent divisors for PCLK/HCLK and ACLK clocks.
 401          */
 402         aclk_div = GPLL_HZ / PD_BUS_ACLK_HZ - 1;
 403         assert((aclk_div + 1) * PD_BUS_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
 404         hclk_div = PD_BUS_ACLK_HZ / PD_BUS_HCLK_HZ - 1;
 405         assert((hclk_div + 1) * PD_BUS_HCLK_HZ ==
 406                 PD_BUS_ACLK_HZ && (hclk_div < 0x4) && (hclk_div != 0x2));
 407
 408         pclk_div = PD_BUS_ACLK_HZ / PD_BUS_PCLK_HZ - 1;
 409         assert((pclk_div + 1) * PD_BUS_PCLK_HZ ==
 410                 PD_BUS_ACLK_HZ && pclk_div < 0x7);
 411
 412         rk_clrsetreg(&cru->cru_clksel_con[1],
 413                      PD_BUS_PCLK_DIV_MASK | PD_BUS_HCLK_DIV_MASK |
 414                      PD_BUS_ACLK_DIV0_MASK | PD_BUS_ACLK_DIV1_MASK,
 415                      pclk_div << PD_BUS_PCLK_DIV_SHIFT |
 416                      hclk_div << PD_BUS_HCLK_DIV_SHIFT |
 417                      aclk_div << PD_BUS_ACLK_DIV0_SHIFT |
 418                      0 << 0);
 419
 420         /*
 421          * peri clock pll source selection and
 422          * set up dependent divisors for PCLK/HCLK and ACLK clocks.
 423          */
 424         aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
 425         assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
 426
 427         hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ);
 428         assert((1 << hclk_div) * PERI_HCLK_HZ ==
 429                 PERI_ACLK_HZ && (hclk_div < 0x4));
 430
 431         pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ);
 432         assert((1 << pclk_div) * PERI_PCLK_HZ ==
 433                 PERI_ACLK_HZ && (pclk_div < 0x4));
 434
 435         rk_clrsetreg(&cru->cru_clksel_con[10],
 436                      PERI_PCLK_DIV_MASK | PERI_HCLK_DIV_MASK |
 437                      PERI_ACLK_DIV_MASK,
 438                      PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT |
 439                      pclk_div << PERI_PCLK_DIV_SHIFT |
 440                      hclk_div << PERI_HCLK_DIV_SHIFT |
 441                      aclk_div << PERI_ACLK_DIV_SHIFT);
 442
 443         /* PLL enter normal-mode */
 444         rk_clrsetreg(&cru->cru_mode_con,
 445                      GPLL_MODE_MASK | CPLL_MODE_MASK,
 446                      GPLL_MODE_NORMAL << GPLL_MODE_SHIFT |
 447                      CPLL_MODE_NORMAL << CPLL_MODE_SHIFT);
 448 }
 449
 450 void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf)
 451 {
 452         /* pll enter slow-mode */
 453         rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK,
 454                      APLL_MODE_SLOW << APLL_MODE_SHIFT);
 455
 456         rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg);
 457
 458         /* waiting for pll lock */
 459         while (!(readl(&grf->soc_status[1]) & SOCSTS_APLL_LOCK))
 460                 udelay(1);
 461
 462         /*
 463          * core clock pll source selection and
 464          * set up dependent divisors for MPAXI/M0AXI and ARM clocks.
 465          * core clock select apll, apll clk = 1800MHz
 466          * arm clk = 1800MHz, mpclk = 450MHz, m0clk = 900MHz
 467          */
 468         rk_clrsetreg(&cru->cru_clksel_con[0],
 469                      CORE_SEL_PLL_MASK | A17_DIV_MASK | MP_DIV_MASK |
 470                      M0_DIV_MASK,
 471                      0 << A17_DIV_SHIFT |
 472                      3 << MP_DIV_SHIFT |
 473                      1 << M0_DIV_SHIFT);
 474
 475         /*
 476          * set up dependent divisors for L2RAM/ATCLK and PCLK clocks.
 477          * l2ramclk = 900MHz, atclk = 450MHz, pclk_dbg = 450MHz
 478          */
 479         rk_clrsetreg(&cru->cru_clksel_con[37],
 480                      CLK_L2RAM_DIV_MASK | ATCLK_CORE_DIV_CON_MASK |
 481                      PCLK_CORE_DBG_DIV_MASK,
 482                      1 << CLK_L2RAM_DIV_SHIFT |
 483                      3 << ATCLK_CORE_DIV_CON_SHIFT |
 484                      3 << PCLK_CORE_DBG_DIV_SHIFT);
 485
 486         /* PLL enter normal-mode */
 487         rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK,
 488                      APLL_MODE_NORMAL << APLL_MODE_SHIFT);
 489 }
 490
 491 /* Get pll rate by id */
 492 static uint32_t rkclk_pll_get_rate(struct rk3288_cru *cru,
 493                                    enum rk_clk_id clk_id)
 494 {
 495         uint32_t nr, no, nf;
 496         uint32_t con;
 497         int pll_id = rk_pll_id(clk_id);
 498         struct rk3288_pll *pll = &cru->pll[pll_id];
 499         static u8 clk_shift[CLK_COUNT] = {
 500                 0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT,
 501                 GPLL_MODE_SHIFT, NPLL_MODE_SHIFT
 502         };
 503         uint shift;
 504
 505         con = readl(&cru->cru_mode_con);
 506         shift = clk_shift[clk_id];
 507         switch ((con >> shift) & CRU_MODE_MASK) {
 508         case APLL_MODE_SLOW:
 509                 return OSC_HZ;
 510         case APLL_MODE_NORMAL:
 511                 /* normal mode */
 512                 con = readl(&pll->con0);
 513                 no = ((con & CLKOD_MASK) >> CLKOD_SHIFT) + 1;
 514                 nr = ((con & CLKR_MASK) >> CLKR_SHIFT) + 1;
 515                 con = readl(&pll->con1);
 516                 nf = ((con & CLKF_MASK) >> CLKF_SHIFT) + 1;
 517
 518                 return (24 * nf / (nr * no)) * 1000000;
 519         case APLL_MODE_DEEP:
 520         default:
 521                 return 32768;
 522         }
 523 }
 524
 525 static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint gclk_rate,
 526                                   int periph)
 527 {
 528         uint src_rate;
 529         uint div, mux;
 530         u32 con;
 531
 532         switch (periph) {
 533         case HCLK_EMMC:
 534         case SCLK_EMMC:
 535                 con = readl(&cru->cru_clksel_con[12]);
 536                 mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT;
 537                 div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT;
 538                 break;
 539         case HCLK_SDMMC:
 540         case SCLK_SDMMC:
 541                 con = readl(&cru->cru_clksel_con[11]);
 542                 mux = (con & MMC0_PLL_MASK) >> MMC0_PLL_SHIFT;
 543                 div = (con & MMC0_DIV_MASK) >> MMC0_DIV_SHIFT;
 544                 break;
 545         case HCLK_SDIO0:
 546         case SCLK_SDIO0:
 547                 con = readl(&cru->cru_clksel_con[12]);
 548                 mux = (con & SDIO0_PLL_MASK) >> SDIO0_PLL_SHIFT;
 549                 div = (con & SDIO0_DIV_MASK) >> SDIO0_DIV_SHIFT;
 550                 break;
 551         default:
 552                 return -EINVAL;
 553         }
 554
 555         src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : gclk_rate;
 556         return DIV_TO_RATE(src_rate, div);
 557 }
 558
 559 static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint gclk_rate,
 560                                   int  periph, uint freq)
 561 {
 562         int src_clk_div;
 563         int mux;
 564
 565         debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
 566         /* mmc clock default div 2 internal, need provide double in cru */
 567         src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq);
 568
 569         if (src_clk_div > 0x3f) {
 570                 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq);
 571                 assert(src_clk_div < 0x40);
 572                 mux = EMMC_PLL_SELECT_24MHZ;
 573                 assert((int)EMMC_PLL_SELECT_24MHZ ==
 574                        (int)MMC0_PLL_SELECT_24MHZ);
 575         } else {
 576                 mux = EMMC_PLL_SELECT_GENERAL;
 577                 assert((int)EMMC_PLL_SELECT_GENERAL ==
 578                        (int)MMC0_PLL_SELECT_GENERAL);
 579         }
 580         switch (periph) {
 581         case HCLK_EMMC:
 582         case SCLK_EMMC:
 583                 rk_clrsetreg(&cru->cru_clksel_con[12],
 584                              EMMC_PLL_MASK | EMMC_DIV_MASK,
 585                              mux << EMMC_PLL_SHIFT |
 586                              (src_clk_div - 1) << EMMC_DIV_SHIFT);
 587                 break;
 588         case HCLK_SDMMC:
 589         case SCLK_SDMMC:
 590                 rk_clrsetreg(&cru->cru_clksel_con[11],
 591                              MMC0_PLL_MASK | MMC0_DIV_MASK,
 592                              mux << MMC0_PLL_SHIFT |
 593                              (src_clk_div - 1) << MMC0_DIV_SHIFT);
 594                 break;
 595         case HCLK_SDIO0:
 596         case SCLK_SDIO0:
 597                 rk_clrsetreg(&cru->cru_clksel_con[12],
 598                              SDIO0_PLL_MASK | SDIO0_DIV_MASK,
 599                              mux << SDIO0_PLL_SHIFT |
 600                              (src_clk_div - 1) << SDIO0_DIV_SHIFT);
 601                 break;
 602         default:
 603                 return -EINVAL;
 604         }
 605
 606         return rockchip_mmc_get_clk(cru, gclk_rate, periph);
 607 }
 608
 609 static ulong rockchip_spi_get_clk(struct rk3288_cru *cru, uint gclk_rate,
 610                                   int periph)
 611 {
 612         uint div, mux;
 613         u32 con;
 614
 615         switch (periph) {
 616         case SCLK_SPI0:
 617                 con = readl(&cru->cru_clksel_con[25]);
 618                 mux = (con & SPI0_PLL_MASK) >> SPI0_PLL_SHIFT;
 619                 div = (con & SPI0_DIV_MASK) >> SPI0_DIV_SHIFT;
 620                 break;
 621         case SCLK_SPI1:
 622                 con = readl(&cru->cru_clksel_con[25]);
 623                 mux = (con & SPI1_PLL_MASK) >> SPI1_PLL_SHIFT;
 624                 div = (con & SPI1_DIV_MASK) >> SPI1_DIV_SHIFT;
 625                 break;
 626         case SCLK_SPI2:
 627                 con = readl(&cru->cru_clksel_con[39]);
 628                 mux = (con & SPI2_PLL_MASK) >> SPI2_PLL_SHIFT;
 629                 div = (con & SPI2_DIV_MASK) >> SPI2_DIV_SHIFT;
 630                 break;
 631         default:
 632                 return -EINVAL;
 633         }
 634         assert(mux == SPI0_PLL_SELECT_GENERAL);
 635
 636         return DIV_TO_RATE(gclk_rate, div);
 637 }
 638
 639 static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate,
 640                                   int periph, uint freq)
 641 {
 642         int src_clk_div;
 643
 644         debug("%s: clk_general_rate=%u\n", __func__, gclk_rate);
 645         src_clk_div = DIV_ROUND_UP(gclk_rate, freq) - 1;
 646         assert(src_clk_div < 128);
 647         switch (periph) {
 648         case SCLK_SPI0:
 649                 rk_clrsetreg(&cru->cru_clksel_con[25],
 650                              SPI0_PLL_MASK | SPI0_DIV_MASK,
 651                              SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT |
 652                              src_clk_div << SPI0_DIV_SHIFT);
 653                 break;
 654         case SCLK_SPI1:
 655                 rk_clrsetreg(&cru->cru_clksel_con[25],
 656                              SPI1_PLL_MASK | SPI1_DIV_MASK,
 657                              SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT |
 658                              src_clk_div << SPI1_DIV_SHIFT);
 659                 break;
 660         case SCLK_SPI2:
 661                 rk_clrsetreg(&cru->cru_clksel_con[39],
 662                              SPI2_PLL_MASK | SPI2_DIV_MASK,
 663                              SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT |
 664                              src_clk_div << SPI2_DIV_SHIFT);
 665                 break;
 666         default:
 667                 return -EINVAL;
 668         }
 669
 670         return rockchip_spi_get_clk(cru, gclk_rate, periph);
 671 }
 672
 673 static ulong rockchip_saradc_get_clk(struct rk3288_cru *cru)
 674 {
 675         u32 div, val;
 676
 677         val = readl(&cru->cru_clksel_con[24]);
 678         div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT,
 679                                CLK_SARADC_DIV_CON_WIDTH);
 680
 681         return DIV_TO_RATE(OSC_HZ, div);
 682 }
 683
 684 static ulong rockchip_saradc_set_clk(struct rk3288_cru *cru, uint hz)
 685 {
 686         int src_clk_div;
 687
 688         src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1;
 689         assert(src_clk_div < 128);
 690
 691         rk_clrsetreg(&cru->cru_clksel_con[24],
 692                      CLK_SARADC_DIV_CON_MASK,
 693                      src_clk_div << CLK_SARADC_DIV_CON_SHIFT);
 694
 695         return rockchip_saradc_get_clk(cru);
 696 }
 697
 698 static ulong rk3288_clk_get_rate(struct clk *clk)
 699 {
 700         struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
 701         ulong new_rate, gclk_rate;
 702
 703         gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
 704         switch (clk->id) {
 705         case 0 ... 63:
 706                 new_rate = rkclk_pll_get_rate(priv->cru, clk->id);
 707                 break;
 708         case HCLK_EMMC:
 709         case HCLK_SDMMC:
 710         case HCLK_SDIO0:
 711         case SCLK_EMMC:
 712         case SCLK_SDMMC:
 713         case SCLK_SDIO0:
 714                 new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id);
 715                 break;
 716         case SCLK_SPI0:
 717         case SCLK_SPI1:
 718         case SCLK_SPI2:
 719                 new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id);
 720                 break;
 721         case PCLK_I2C0:
 722         case PCLK_I2C1:
 723         case PCLK_I2C2:
 724         case PCLK_I2C3:
 725         case PCLK_I2C4:
 726         case PCLK_I2C5:
 727                 return gclk_rate;
 728         case PCLK_PWM:
 729                 return PD_BUS_PCLK_HZ;
 730         case SCLK_SARADC:
 731                 new_rate = rockchip_saradc_get_clk(priv->cru);
 732                 break;
 733         default:
 734                 return -ENOENT;
 735         }
 736
 737         return new_rate;
 738 }
 739
 740 static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate)
 741 {
 742         struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
 743         struct rk3288_cru *cru = priv->cru;
 744         ulong new_rate, gclk_rate;
 745
 746         gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
 747         switch (clk->id) {
 748         case PLL_APLL:
 749                 /* We only support a fixed rate here */
 750                 if (rate != 1800000000)
 751                         return -EINVAL;
 752                 rk3288_clk_configure_cpu(priv->cru, priv->grf);
 753                 new_rate = rate;
 754                 break;
 755         case CLK_DDR:
 756                 new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate);
 757                 break;
 758         case HCLK_EMMC:
 759         case HCLK_SDMMC:
 760         case HCLK_SDIO0:
 761         case SCLK_EMMC:
 762         case SCLK_SDMMC:
 763         case SCLK_SDIO0:
 764                 new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate);
 765                 break;
 766         case SCLK_SPI0:
 767         case SCLK_SPI1:
 768         case SCLK_SPI2:
 769                 new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate);
 770                 break;
 771 #ifndef CONFIG_SPL_BUILD
 772         case SCLK_MAC:
 773                 new_rate = rockchip_mac_set_clk(priv->cru, rate);
 774                 break;
 775         case DCLK_VOP0:
 776         case DCLK_VOP1:
 777                 new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate);
 778                 break;
 779         case SCLK_EDP_24M:
 780                 /* clk_edp_24M source: 24M */
 781                 rk_setreg(&cru->cru_clksel_con[28], 1 << 15);
 782
 783                 /* rst edp */
 784                 rk_setreg(&cru->cru_clksel_con[6], 1 << 15);
 785                 udelay(1);
 786                 rk_clrreg(&cru->cru_clksel_con[6], 1 << 15);
 787                 new_rate = rate;
 788                 break;
 789         case ACLK_VOP0:
 790         case ACLK_VOP1: {
 791                 u32 div;
 792
 793                 /* vop aclk source clk: cpll */
 794                 div = CPLL_HZ / rate;
 795                 assert((div - 1 < 64) && (div * rate == CPLL_HZ));
 796
 797                 switch (clk->id) {
 798                 case ACLK_VOP0:
 799                         rk_clrsetreg(&cru->cru_clksel_con[31],
 800                                      3 << 6 | 0x1f << 0,
 801                                      0 << 6 | (div - 1) << 0);
 802                         break;
 803                 case ACLK_VOP1:
 804                         rk_clrsetreg(&cru->cru_clksel_con[31],
 805                                      3 << 14 | 0x1f << 8,
 806                                      0 << 14 | (div - 1) << 8);
 807                         break;
 808                 }
 809                 new_rate = rate;
 810                 break;
 811         }
 812         case PCLK_HDMI_CTRL:
 813                 /* enable pclk hdmi ctrl */
 814                 rk_clrreg(&cru->cru_clkgate_con[16], 1 << 9);
 815
 816                 /* software reset hdmi */
 817                 rk_setreg(&cru->cru_clkgate_con[7], 1 << 9);
 818                 udelay(1);
 819                 rk_clrreg(&cru->cru_clkgate_con[7], 1 << 9);
 820                 new_rate = rate;
 821                 break;
 822 #endif
 823         case SCLK_SARADC:
 824                 new_rate = rockchip_saradc_set_clk(priv->cru, rate);
 825                 break;
 826         case PLL_GPLL:
 827         case PLL_CPLL:
 828         case PLL_NPLL:
 829         case ACLK_CPU:
 830         case HCLK_CPU:
 831         case PCLK_CPU:
 832         case ACLK_PERI:
 833         case HCLK_PERI:
 834         case PCLK_PERI:
 835         case SCLK_UART0:
 836                 return 0;
 837         default:
 838                 return -ENOENT;
 839         }
 840
 841         return new_rate;
 842 }
 843
 844 static int __maybe_unused rk3288_gmac_set_parent(struct clk *clk, struct clk *parent)
 845 {
 846         struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
 847         struct rk3288_cru *cru = priv->cru;
 848         const char *clock_output_name;
 849         int ret;
 850
 851         /*
 852          * If the requested parent is in the same clock-controller and
 853          * the id is SCLK_MAC_PLL ("mac_pll_src"), switch to the internal
 854          * clock.
 855          */
 856         if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_PLL)) {
 857                 debug("%s: switching GAMC to SCLK_MAC_PLL\n", __func__);
 858                 rk_clrsetreg(&cru->cru_clksel_con[21], RMII_EXTCLK_MASK, 0);
 859                 return 0;
 860         }
 861
 862         /*
 863          * Otherwise, we need to check the clock-output-names of the
 864          * requested parent to see if the requested id is "ext_gmac".
 865          */
 866         ret = dev_read_string_index(parent->dev, "clock-output-names",
 867                                     parent->id, &clock_output_name);
 868         if (ret < 0)
 869                 return -ENODATA;
 870
 871         /* If this is "ext_gmac", switch to the external clock input */
 872         if (!strcmp(clock_output_name, "ext_gmac")) {
 873                 debug("%s: switching GMAC to external clock\n", __func__);
 874                 rk_clrsetreg(&cru->cru_clksel_con[21], RMII_EXTCLK_MASK,
 875                              RMII_EXTCLK_SELECT_EXT_CLK << RMII_EXTCLK_SHIFT);
 876                 return 0;
 877         }
 878
 879         return -EINVAL;
 880 }
 881
 882 static int __maybe_unused rk3288_clk_set_parent(struct clk *clk, struct clk *parent)
 883 {
 884         switch (clk->id) {
 885         case SCLK_MAC:
 886                 return rk3288_gmac_set_parent(clk, parent);
 887         case SCLK_USBPHY480M_SRC:
 888                 return 0;
 889         }
 890
 891         debug("%s: unsupported clk %ld\n", __func__, clk->id);
 892         return -ENOENT;
 893 }
 894
 895 static int rk3288_clk_enable(struct clk *clk)
 896 {
 897         switch (clk->id) {
 898         case HCLK_USBHOST0:
 899         case HCLK_HSIC:
 900                 return 0;
 901
 902         case SCLK_MAC:
 903         case SCLK_MAC_RX:
 904         case SCLK_MAC_TX:
 905         case SCLK_MACREF:
 906         case SCLK_MACREF_OUT:
 907         case ACLK_GMAC:
 908         case PCLK_GMAC:
 909                 /* Required to successfully probe the Designware GMAC driver */
 910                 return 0;
 911         }
 912
 913         debug("%s: unsupported clk %ld\n", __func__, clk->id);
 914         return -ENOENT;
 915 }
 916
 917 static struct clk_ops rk3288_clk_ops = {
 918         .get_rate       = rk3288_clk_get_rate,
 919         .set_rate       = rk3288_clk_set_rate,
 920 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 921         .set_parent     = rk3288_clk_set_parent,
 922 #endif
 923         .enable = rk3288_clk_enable,
 924 };
 925
 926 static int rk3288_clk_ofdata_to_platdata(struct udevice *dev)
 927 {
 928 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
 929         struct rk3288_clk_priv *priv = dev_get_priv(dev);
 930
 931         priv->cru = dev_read_addr_ptr(dev);
 932 #endif
 933
 934         return 0;
 935 }
 936
 937 static int rk3288_clk_probe(struct udevice *dev)
 938 {
 939         struct rk3288_clk_priv *priv = dev_get_priv(dev);
 940         bool init_clocks = false;
 941
 942         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 943         if (IS_ERR(priv->grf))
 944                 return PTR_ERR(priv->grf);
 945 #ifdef CONFIG_SPL_BUILD
 946 #if CONFIG_IS_ENABLED(OF_PLATDATA)
 947         struct rk3288_clk_plat *plat = dev_get_platdata(dev);
 948
 949         priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]);
 950 #endif
 951         init_clocks = true;
 952 #endif
 953         if (!(gd->flags & GD_FLG_RELOC)) {
 954                 u32 reg;
 955
 956                 /*
 957                  * Init clocks in U-Boot proper if the NPLL is runnning. This
 958                  * indicates that a previous boot loader set up the clocks, so
 959                  * we need to redo it. U-Boot's SPL does not set this clock.
 960                  */
 961                 reg = readl(&priv->cru->cru_mode_con);
 962                 if (((reg & NPLL_MODE_MASK) >> NPLL_MODE_SHIFT) ==
 963                                 NPLL_MODE_NORMAL)
 964                         init_clocks = true;
 965         }
 966
 967         if (init_clocks)
 968                 rkclk_init(priv->cru, priv->grf);
 969
 970         return 0;
 971 }
 972
 973 static int rk3288_clk_bind(struct udevice *dev)
 974 {
 975         int ret;
 976         struct udevice *sys_child;
 977         struct sysreset_reg *priv;
 978
 979         /* The reset driver does not have a device node, so bind it here */
 980         ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
 981                                  &sys_child);
 982         if (ret) {
 983                 debug("Warning: No sysreset driver: ret=%d\n", ret);
 984         } else {
 985                 priv = malloc(sizeof(struct sysreset_reg));
 986                 priv->glb_srst_fst_value = offsetof(struct rk3288_cru,
 987                                                     cru_glb_srst_fst_value);
 988                 priv->glb_srst_snd_value = offsetof(struct rk3288_cru,
 989                                                     cru_glb_srst_snd_value);
 990                 sys_child->priv = priv;
 991         }
 992
 993 #if CONFIG_IS_ENABLED(CONFIG_RESET_ROCKCHIP)
 994         ret = offsetof(struct rk3288_cru, cru_softrst_con[0]);
 995         ret = rockchip_reset_bind(dev, ret, 12);
 996         if (ret)
 997                 debug("Warning: software reset driver bind faile\n");
 998 #endif
 999
1000         return 0;
1001 }
1002
1003 static const struct udevice_id rk3288_clk_ids[] = {
1004         { .compatible = "rockchip,rk3288-cru" },
1005         { }
1006 };
1007
1008 U_BOOT_DRIVER(rockchip_rk3288_cru) = {
1009         .name           = "rockchip_rk3288_cru",
1010         .id             = UCLASS_CLK,
1011         .of_match       = rk3288_clk_ids,
1012         .priv_auto_alloc_size = sizeof(struct rk3288_clk_priv),
1013         .platdata_auto_alloc_size = sizeof(struct rk3288_clk_plat),
1014         .ops            = &rk3288_clk_ops,
1015         .bind           = rk3288_clk_bind,
1016         .ofdata_to_platdata     = rk3288_clk_ofdata_to_platdata,
1017         .probe          = rk3288_clk_probe,
1018 };