drivers/clk/ingenic/jz4770-cgu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * JZ4770 SoC CGU driver
   4  * Copyright 2018, Paul Cercueil <paul@crapouillou.net>
   5  */
   6
   7 #include <linux/bitops.h>
   8 #include <linux/clk-provider.h>
   9 #include <linux/delay.h>
  10 #include <linux/of.h>
  11 #include <linux/syscore_ops.h>
  12 #include <dt-bindings/clock/jz4770-cgu.h>
  13 #include "cgu.h"
  14
  15 /*
  16  * CPM registers offset address definition
  17  */
  18 #define CGU_REG_CPCCR           0x00
  19 #define CGU_REG_LCR             0x04
  20 #define CGU_REG_CPPCR0          0x10
  21 #define CGU_REG_CLKGR0          0x20
  22 #define CGU_REG_OPCR            0x24
  23 #define CGU_REG_CLKGR1          0x28
  24 #define CGU_REG_CPPCR1          0x30
  25 #define CGU_REG_USBPCR1         0x48
  26 #define CGU_REG_USBCDR          0x50
  27 #define CGU_REG_I2SCDR          0x60
  28 #define CGU_REG_LPCDR           0x64
  29 #define CGU_REG_MSC0CDR         0x68
  30 #define CGU_REG_UHCCDR          0x6c
  31 #define CGU_REG_SSICDR          0x74
  32 #define CGU_REG_CIMCDR          0x7c
  33 #define CGU_REG_GPSCDR          0x80
  34 #define CGU_REG_PCMCDR          0x84
  35 #define CGU_REG_GPUCDR          0x88
  36 #define CGU_REG_MSC1CDR         0xA4
  37 #define CGU_REG_MSC2CDR         0xA8
  38 #define CGU_REG_BCHCDR          0xAC
  39
  40 /* bits within the LCR register */
  41 #define LCR_LPM                 BIT(0)          /* Low Power Mode */
  42
  43 /* bits within the OPCR register */
  44 #define OPCR_SPENDH             BIT(5)          /* UHC PHY suspend */
  45
  46 /* bits within the USBPCR1 register */
  47 #define USBPCR1_UHC_POWER       BIT(5)          /* UHC PHY power down */
  48
  49 static struct ingenic_cgu *cgu;
  50
  51 static int jz4770_uhc_phy_enable(struct clk_hw *hw)
  52 {
  53         void __iomem *reg_opcr          = cgu->base + CGU_REG_OPCR;
  54         void __iomem *reg_usbpcr1       = cgu->base + CGU_REG_USBPCR1;
  55
  56         writel(readl(reg_opcr) & ~OPCR_SPENDH, reg_opcr);
  57         writel(readl(reg_usbpcr1) | USBPCR1_UHC_POWER, reg_usbpcr1);
  58         return 0;
  59 }
  60
  61 static void jz4770_uhc_phy_disable(struct clk_hw *hw)
  62 {
  63         void __iomem *reg_opcr          = cgu->base + CGU_REG_OPCR;
  64         void __iomem *reg_usbpcr1       = cgu->base + CGU_REG_USBPCR1;
  65
  66         writel(readl(reg_usbpcr1) & ~USBPCR1_UHC_POWER, reg_usbpcr1);
  67         writel(readl(reg_opcr) | OPCR_SPENDH, reg_opcr);
  68 }
  69
  70 static int jz4770_uhc_phy_is_enabled(struct clk_hw *hw)
  71 {
  72         void __iomem *reg_opcr          = cgu->base + CGU_REG_OPCR;
  73         void __iomem *reg_usbpcr1       = cgu->base + CGU_REG_USBPCR1;
  74
  75         return !(readl(reg_opcr) & OPCR_SPENDH) &&
  76                 (readl(reg_usbpcr1) & USBPCR1_UHC_POWER);
  77 }
  78
  79 static const struct clk_ops jz4770_uhc_phy_ops = {
  80         .enable = jz4770_uhc_phy_enable,
  81         .disable = jz4770_uhc_phy_disable,
  82         .is_enabled = jz4770_uhc_phy_is_enabled,
  83 };
  84
  85 static const s8 pll_od_encoding[8] = {
  86         0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3,
  87 };
  88
  89 static const struct ingenic_cgu_clk_info jz4770_cgu_clocks[] = {
  90
  91         /* External clocks */
  92
  93         [JZ4770_CLK_EXT] = { "ext", CGU_CLK_EXT },
  94         [JZ4770_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT },
  95
  96         /* PLLs */
  97
  98         [JZ4770_CLK_PLL0] = {
  99                 "pll0", CGU_CLK_PLL,
 100                 .parents = { JZ4770_CLK_EXT },
 101                 .pll = {
 102                         .reg = CGU_REG_CPPCR0,
 103                         .m_shift = 24,
 104                         .m_bits = 7,
 105                         .m_offset = 1,
 106                         .n_shift = 18,
 107                         .n_bits = 5,
 108                         .n_offset = 1,
 109                         .od_shift = 16,
 110                         .od_bits = 2,
 111                         .od_max = 8,
 112                         .od_encoding = pll_od_encoding,
 113                         .bypass_bit = 9,
 114                         .enable_bit = 8,
 115                         .stable_bit = 10,
 116                 },
 117         },
 118
 119         [JZ4770_CLK_PLL1] = {
 120                 /* TODO: PLL1 can depend on PLL0 */
 121                 "pll1", CGU_CLK_PLL,
 122                 .parents = { JZ4770_CLK_EXT },
 123                 .pll = {
 124                         .reg = CGU_REG_CPPCR1,
 125                         .m_shift = 24,
 126                         .m_bits = 7,
 127                         .m_offset = 1,
 128                         .n_shift = 18,
 129                         .n_bits = 5,
 130                         .n_offset = 1,
 131                         .od_shift = 16,
 132                         .od_bits = 2,
 133                         .od_max = 8,
 134                         .od_encoding = pll_od_encoding,
 135                         .enable_bit = 7,
 136                         .stable_bit = 6,
 137                         .no_bypass_bit = true,
 138                 },
 139         },
 140
 141         /* Main clocks */
 142
 143         [JZ4770_CLK_CCLK] = {
 144                 "cclk", CGU_CLK_DIV,
 145                 .parents = { JZ4770_CLK_PLL0, },
 146                 .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
 147         },
 148         [JZ4770_CLK_H0CLK] = {
 149                 "h0clk", CGU_CLK_DIV,
 150                 .parents = { JZ4770_CLK_PLL0, },
 151                 .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
 152         },
 153         [JZ4770_CLK_H1CLK] = {
 154                 "h1clk", CGU_CLK_DIV | CGU_CLK_GATE,
 155                 .parents = { JZ4770_CLK_PLL0, },
 156                 .div = { CGU_REG_CPCCR, 24, 1, 4, 22, -1, -1 },
 157                 .gate = { CGU_REG_CLKGR1, 7 },
 158         },
 159         [JZ4770_CLK_H2CLK] = {
 160                 "h2clk", CGU_CLK_DIV,
 161                 .parents = { JZ4770_CLK_PLL0, },
 162                 .div = { CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1 },
 163         },
 164         [JZ4770_CLK_C1CLK] = {
 165                 "c1clk", CGU_CLK_DIV | CGU_CLK_GATE,
 166                 .parents = { JZ4770_CLK_PLL0, },
 167                 .div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 },
 168                 .gate = { CGU_REG_OPCR, 31, true }, // disable CCLK stop on idle
 169         },
 170         [JZ4770_CLK_PCLK] = {
 171                 "pclk", CGU_CLK_DIV,
 172                 .parents = { JZ4770_CLK_PLL0, },
 173                 .div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 },
 174         },
 175
 176         /* Those divided clocks can connect to PLL0 or PLL1 */
 177
 178         [JZ4770_CLK_MMC0_MUX] = {
 179                 "mmc0_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 180                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 181                 .mux = { CGU_REG_MSC0CDR, 30, 1 },
 182                 .div = { CGU_REG_MSC0CDR, 0, 1, 7, -1, -1, 31 },
 183                 .gate = { CGU_REG_MSC0CDR, 31 },
 184         },
 185         [JZ4770_CLK_MMC1_MUX] = {
 186                 "mmc1_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 187                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 188                 .mux = { CGU_REG_MSC1CDR, 30, 1 },
 189                 .div = { CGU_REG_MSC1CDR, 0, 1, 7, -1, -1, 31 },
 190                 .gate = { CGU_REG_MSC1CDR, 31 },
 191         },
 192         [JZ4770_CLK_MMC2_MUX] = {
 193                 "mmc2_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 194                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 195                 .mux = { CGU_REG_MSC2CDR, 30, 1 },
 196                 .div = { CGU_REG_MSC2CDR, 0, 1, 7, -1, -1, 31 },
 197                 .gate = { CGU_REG_MSC2CDR, 31 },
 198         },
 199         [JZ4770_CLK_CIM] = {
 200                 "cim", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 201                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 202                 .mux = { CGU_REG_CIMCDR, 31, 1 },
 203                 .div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 },
 204                 .gate = { CGU_REG_CLKGR0, 26 },
 205         },
 206         [JZ4770_CLK_UHC] = {
 207                 "uhc", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 208                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 209                 .mux = { CGU_REG_UHCCDR, 29, 1 },
 210                 .div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 },
 211                 .gate = { CGU_REG_CLKGR0, 24 },
 212         },
 213         [JZ4770_CLK_GPU] = {
 214                 "gpu", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 215                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, -1 },
 216                 .mux = { CGU_REG_GPUCDR, 31, 1 },
 217                 .div = { CGU_REG_GPUCDR, 0, 1, 3, -1, -1, -1 },
 218                 .gate = { CGU_REG_CLKGR1, 9 },
 219         },
 220         [JZ4770_CLK_BCH] = {
 221                 "bch", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 222                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 223                 .mux = { CGU_REG_BCHCDR, 31, 1 },
 224                 .div = { CGU_REG_BCHCDR, 0, 1, 3, -1, -1, -1 },
 225                 .gate = { CGU_REG_CLKGR0, 1 },
 226         },
 227         [JZ4770_CLK_LPCLK_MUX] = {
 228                 "lpclk", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 229                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 230                 .mux = { CGU_REG_LPCDR, 29, 1 },
 231                 .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
 232                 .gate = { CGU_REG_CLKGR0, 28 },
 233         },
 234         [JZ4770_CLK_GPS] = {
 235                 "gps", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 236                 .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, },
 237                 .mux = { CGU_REG_GPSCDR, 31, 1 },
 238                 .div = { CGU_REG_GPSCDR, 0, 1, 4, -1, -1, -1 },
 239                 .gate = { CGU_REG_CLKGR0, 22 },
 240         },
 241
 242         /* Those divided clocks can connect to EXT, PLL0 or PLL1 */
 243
 244         [JZ4770_CLK_SSI_MUX] = {
 245                 "ssi_mux", CGU_CLK_DIV | CGU_CLK_MUX,
 246                 .parents = { JZ4770_CLK_EXT, -1,
 247                         JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 },
 248                 .mux = { CGU_REG_SSICDR, 30, 2 },
 249                 .div = { CGU_REG_SSICDR, 0, 1, 6, -1, -1, -1 },
 250         },
 251         [JZ4770_CLK_PCM_MUX] = {
 252                 "pcm_mux", CGU_CLK_DIV | CGU_CLK_MUX,
 253                 .parents = { JZ4770_CLK_EXT, -1,
 254                         JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 },
 255                 .mux = { CGU_REG_PCMCDR, 30, 2 },
 256                 .div = { CGU_REG_PCMCDR, 0, 1, 9, -1, -1, -1 },
 257         },
 258         [JZ4770_CLK_I2S] = {
 259                 "i2s", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 260                 .parents = { JZ4770_CLK_EXT, -1,
 261                         JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 },
 262                 .mux = { CGU_REG_I2SCDR, 30, 2 },
 263                 .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
 264                 .gate = { CGU_REG_CLKGR1, 13 },
 265         },
 266         [JZ4770_CLK_OTG] = {
 267                 "usb", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
 268                 .parents = { JZ4770_CLK_EXT, -1,
 269                         JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 },
 270                 .mux = { CGU_REG_USBCDR, 30, 2 },
 271                 .div = { CGU_REG_USBCDR, 0, 1, 8, -1, -1, -1 },
 272                 .gate = { CGU_REG_CLKGR0, 2 },
 273         },
 274
 275         /* Gate-only clocks */
 276
 277         [JZ4770_CLK_SSI0] = {
 278                 "ssi0", CGU_CLK_GATE,
 279                 .parents = { JZ4770_CLK_SSI_MUX, },
 280                 .gate = { CGU_REG_CLKGR0, 4 },
 281         },
 282         [JZ4770_CLK_SSI1] = {
 283                 "ssi1", CGU_CLK_GATE,
 284                 .parents = { JZ4770_CLK_SSI_MUX, },
 285                 .gate = { CGU_REG_CLKGR0, 19 },
 286         },
 287         [JZ4770_CLK_SSI2] = {
 288                 "ssi2", CGU_CLK_GATE,
 289                 .parents = { JZ4770_CLK_SSI_MUX, },
 290                 .gate = { CGU_REG_CLKGR0, 20 },
 291         },
 292         [JZ4770_CLK_PCM0] = {
 293                 "pcm0", CGU_CLK_GATE,
 294                 .parents = { JZ4770_CLK_PCM_MUX, },
 295                 .gate = { CGU_REG_CLKGR1, 8 },
 296         },
 297         [JZ4770_CLK_PCM1] = {
 298                 "pcm1", CGU_CLK_GATE,
 299                 .parents = { JZ4770_CLK_PCM_MUX, },
 300                 .gate = { CGU_REG_CLKGR1, 10 },
 301         },
 302         [JZ4770_CLK_DMA] = {
 303                 "dma", CGU_CLK_GATE,
 304                 .parents = { JZ4770_CLK_H2CLK, },
 305                 .gate = { CGU_REG_CLKGR0, 21 },
 306         },
 307         [JZ4770_CLK_I2C0] = {
 308                 "i2c0", CGU_CLK_GATE,
 309                 .parents = { JZ4770_CLK_EXT, },
 310                 .gate = { CGU_REG_CLKGR0, 5 },
 311         },
 312         [JZ4770_CLK_I2C1] = {
 313                 "i2c1", CGU_CLK_GATE,
 314                 .parents = { JZ4770_CLK_EXT, },
 315                 .gate = { CGU_REG_CLKGR0, 6 },
 316         },
 317         [JZ4770_CLK_I2C2] = {
 318                 "i2c2", CGU_CLK_GATE,
 319                 .parents = { JZ4770_CLK_EXT, },
 320                 .gate = { CGU_REG_CLKGR1, 15 },
 321         },
 322         [JZ4770_CLK_UART0] = {
 323                 "uart0", CGU_CLK_GATE,
 324                 .parents = { JZ4770_CLK_EXT, },
 325                 .gate = { CGU_REG_CLKGR0, 15 },
 326         },
 327         [JZ4770_CLK_UART1] = {
 328                 "uart1", CGU_CLK_GATE,
 329                 .parents = { JZ4770_CLK_EXT, },
 330                 .gate = { CGU_REG_CLKGR0, 16 },
 331         },
 332         [JZ4770_CLK_UART2] = {
 333                 "uart2", CGU_CLK_GATE,
 334                 .parents = { JZ4770_CLK_EXT, },
 335                 .gate = { CGU_REG_CLKGR0, 17 },
 336         },
 337         [JZ4770_CLK_UART3] = {
 338                 "uart3", CGU_CLK_GATE,
 339                 .parents = { JZ4770_CLK_EXT, },
 340                 .gate = { CGU_REG_CLKGR0, 18 },
 341         },
 342         [JZ4770_CLK_IPU] = {
 343                 "ipu", CGU_CLK_GATE,
 344                 .parents = { JZ4770_CLK_H0CLK, },
 345                 .gate = { CGU_REG_CLKGR0, 29 },
 346         },
 347         [JZ4770_CLK_ADC] = {
 348                 "adc", CGU_CLK_GATE,
 349                 .parents = { JZ4770_CLK_EXT, },
 350                 .gate = { CGU_REG_CLKGR0, 14 },
 351         },
 352         [JZ4770_CLK_AIC] = {
 353                 "aic", CGU_CLK_GATE,
 354                 .parents = { JZ4770_CLK_EXT, },
 355                 .gate = { CGU_REG_CLKGR0, 8 },
 356         },
 357         [JZ4770_CLK_AUX] = {
 358                 "aux", CGU_CLK_GATE,
 359                 .parents = { JZ4770_CLK_C1CLK, },
 360                 .gate = { CGU_REG_CLKGR1, 14 },
 361         },
 362         [JZ4770_CLK_VPU] = {
 363                 "vpu", CGU_CLK_GATE,
 364                 .parents = { JZ4770_CLK_H1CLK, },
 365                 .gate = { CGU_REG_LCR, 30, false, 150 },
 366         },
 367         [JZ4770_CLK_MMC0] = {
 368                 "mmc0", CGU_CLK_GATE,
 369                 .parents = { JZ4770_CLK_MMC0_MUX, },
 370                 .gate = { CGU_REG_CLKGR0, 3 },
 371         },
 372         [JZ4770_CLK_MMC1] = {
 373                 "mmc1", CGU_CLK_GATE,
 374                 .parents = { JZ4770_CLK_MMC1_MUX, },
 375                 .gate = { CGU_REG_CLKGR0, 11 },
 376         },
 377         [JZ4770_CLK_MMC2] = {
 378                 "mmc2", CGU_CLK_GATE,
 379                 .parents = { JZ4770_CLK_MMC2_MUX, },
 380                 .gate = { CGU_REG_CLKGR0, 12 },
 381         },
 382         [JZ4770_CLK_OTG_PHY] = {
 383                 "usb_phy", CGU_CLK_GATE,
 384                 .parents = { JZ4770_CLK_OTG },
 385                 .gate = { CGU_REG_OPCR, 7, true, 50 },
 386         },
 387
 388         /* Custom clocks */
 389
 390         [JZ4770_CLK_UHC_PHY] = {
 391                 "uhc_phy", CGU_CLK_CUSTOM,
 392                 .parents = { JZ4770_CLK_UHC, -1, -1, -1 },
 393                 .custom = { &jz4770_uhc_phy_ops },
 394         },
 395
 396         [JZ4770_CLK_EXT512] = {
 397                 "ext/512", CGU_CLK_FIXDIV,
 398                 .parents = { JZ4770_CLK_EXT },
 399                 .fixdiv = { 512 },
 400         },
 401
 402         [JZ4770_CLK_RTC] = {
 403                 "rtc", CGU_CLK_MUX,
 404                 .parents = { JZ4770_CLK_EXT512, JZ4770_CLK_OSC32K, },
 405                 .mux = { CGU_REG_OPCR, 2, 1},
 406         },
 407 };
 408
 409 #if IS_ENABLED(CONFIG_PM_SLEEP)
 410 static int jz4770_cgu_pm_suspend(void)
 411 {
 412         u32 val;
 413
 414         val = readl(cgu->base + CGU_REG_LCR);
 415         writel(val | LCR_LPM, cgu->base + CGU_REG_LCR);
 416         return 0;
 417 }
 418
 419 static void jz4770_cgu_pm_resume(void)
 420 {
 421         u32 val;
 422
 423         val = readl(cgu->base + CGU_REG_LCR);
 424         writel(val & ~LCR_LPM, cgu->base + CGU_REG_LCR);
 425 }
 426
 427 static struct syscore_ops jz4770_cgu_pm_ops = {
 428         .suspend = jz4770_cgu_pm_suspend,
 429         .resume = jz4770_cgu_pm_resume,
 430 };
 431 #endif /* CONFIG_PM_SLEEP */
 432
 433 static void __init jz4770_cgu_init(struct device_node *np)
 434 {
 435         int retval;
 436
 437         cgu = ingenic_cgu_new(jz4770_cgu_clocks,
 438                               ARRAY_SIZE(jz4770_cgu_clocks), np);
 439         if (!cgu)
 440                 pr_err("%s: failed to initialise CGU\n", __func__);
 441
 442         retval = ingenic_cgu_register_clocks(cgu);
 443         if (retval)
 444                 pr_err("%s: failed to register CGU Clocks\n", __func__);
 445
 446 #if IS_ENABLED(CONFIG_PM_SLEEP)
 447         register_syscore_ops(&jz4770_cgu_pm_ops);
 448 #endif
 449 }
 450
 451 /* We only probe via devicetree, no need for a platform driver */
 452 CLK_OF_DECLARE(jz4770_cgu, "ingenic,jz4770-cgu", jz4770_cgu_init);