arch/arm/mach-sunxi/clock_sun6i.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * sun6i specific clock code
   4  *
   5  * (C) Copyright 2007-2012
   6  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   7  * Tom Cubie <tangliang@allwinnertech.com>
   8  *
   9  * (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
  10  */
  11
  12 #include <common.h>
  13 #include <asm/io.h>
  14 #include <asm/arch/clock.h>
  15 #include <asm/arch/prcm.h>
  16 #include <asm/arch/sys_proto.h>
  17
  18 #ifdef CONFIG_SPL_BUILD
  19 void clock_init_safe(void)
  20 {
  21         struct sunxi_ccm_reg * const ccm =
  22                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  23
  24 #if !defined(CONFIG_MACH_SUNXI_H3_H5) && !defined(CONFIG_MACH_SUN50I)
  25         struct sunxi_prcm_reg * const prcm =
  26                 (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
  27
  28         /* Set PLL ldo voltage without this PLL6 does not work properly */
  29         clrsetbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK,
  30                         PRCM_PLL_CTRL_LDO_KEY);
  31         clrsetbits_le32(&prcm->pll_ctrl1, ~PRCM_PLL_CTRL_LDO_KEY_MASK,
  32                 PRCM_PLL_CTRL_LDO_DIGITAL_EN | PRCM_PLL_CTRL_LDO_ANALOG_EN |
  33                 PRCM_PLL_CTRL_EXT_OSC_EN | PRCM_PLL_CTRL_LDO_OUT_L(1140));
  34         clrbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK);
  35 #endif
  36
  37 #if defined(CONFIG_MACH_SUN8I_R40) || defined(CONFIG_MACH_SUN50I)
  38         /* Set PLL lock enable bits and switch to old lock mode */
  39         writel(GENMASK(12, 0), &ccm->pll_lock_ctrl);
  40 #endif
  41
  42         clock_set_pll1(408000000);
  43
  44         writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
  45         while (!(readl(&ccm->pll6_cfg) & CCM_PLL6_CTRL_LOCK))
  46                 ;
  47
  48         writel(AHB1_ABP1_DIV_DEFAULT, &ccm->ahb1_apb1_div);
  49
  50         writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg);
  51         if (IS_ENABLED(CONFIG_MACH_SUN6I))
  52                 writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg);
  53
  54 #if defined(CONFIG_MACH_SUN8I_R40) && defined(CONFIG_SUNXI_AHCI)
  55         setbits_le32(&ccm->sata_pll_cfg, CCM_SATA_PLL_DEFAULT);
  56         setbits_le32(&ccm->ahb_reset0_cfg, 0x1 << AHB_GATE_OFFSET_SATA);
  57         setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_SATA);
  58         setbits_le32(&ccm->sata_clk_cfg, CCM_SATA_CTRL_ENABLE);
  59 #endif
  60 }
  61 #endif
  62
  63 void clock_init_sec(void)
  64 {
  65 #ifdef CONFIG_MACH_SUNXI_H3_H5
  66         struct sunxi_ccm_reg * const ccm =
  67                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  68         struct sunxi_prcm_reg * const prcm =
  69                 (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
  70
  71         setbits_le32(&ccm->ccu_sec_switch,
  72                      CCM_SEC_SWITCH_MBUS_NONSEC |
  73                      CCM_SEC_SWITCH_BUS_NONSEC |
  74                      CCM_SEC_SWITCH_PLL_NONSEC);
  75         setbits_le32(&prcm->prcm_sec_switch,
  76                      PRCM_SEC_SWITCH_APB0_CLK_NONSEC |
  77                      PRCM_SEC_SWITCH_PLL_CFG_NONSEC |
  78                      PRCM_SEC_SWITCH_PWR_GATE_NONSEC);
  79 #endif
  80 }
  81
  82 void clock_init_uart(void)
  83 {
  84 #if CONFIG_CONS_INDEX < 5
  85         struct sunxi_ccm_reg *const ccm =
  86                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  87
  88         /* uart clock source is apb2 */
  89         writel(APB2_CLK_SRC_OSC24M|
  90                APB2_CLK_RATE_N_1|
  91                APB2_CLK_RATE_M(1),
  92                &ccm->apb2_div);
  93
  94         /* open the clock for uart */
  95         setbits_le32(&ccm->apb2_gate,
  96                      CLK_GATE_OPEN << (APB2_GATE_UART_SHIFT +
  97                                        CONFIG_CONS_INDEX - 1));
  98
  99         /* deassert uart reset */
 100         setbits_le32(&ccm->apb2_reset_cfg,
 101                      1 << (APB2_RESET_UART_SHIFT +
 102                            CONFIG_CONS_INDEX - 1));
 103 #else
 104         /* enable R_PIO and R_UART clocks, and de-assert resets */
 105         prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_UART);
 106 #endif
 107 }
 108
 109 #ifdef CONFIG_SPL_BUILD
 110 void clock_set_pll1(unsigned int clk)
 111 {
 112         struct sunxi_ccm_reg * const ccm =
 113                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 114         const int p = 0;
 115         int k = 1;
 116         int m = 1;
 117
 118         if (clk > 1152000000) {
 119                 k = 2;
 120         } else if (clk > 768000000) {
 121                 k = 4;
 122                 m = 2;
 123         }
 124
 125         /* Switch to 24MHz clock while changing PLL1 */
 126         writel(AXI_DIV_3 << AXI_DIV_SHIFT |
 127                ATB_DIV_2 << ATB_DIV_SHIFT |
 128                CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
 129                &ccm->cpu_axi_cfg);
 130
 131         /*
 132          * sun6i: PLL1 rate = ((24000000 * n * k) >> 0) / m   (p is ignored)
 133          * sun8i: PLL1 rate = ((24000000 * n * k) >> p) / m
 134          */
 135         writel(CCM_PLL1_CTRL_EN | CCM_PLL1_CTRL_P(p) |
 136                CCM_PLL1_CTRL_N(clk / (24000000 * k / m)) |
 137                CCM_PLL1_CTRL_K(k) | CCM_PLL1_CTRL_M(m), &ccm->pll1_cfg);
 138         sdelay(200);
 139
 140         /* Switch CPU to PLL1 */
 141         writel(AXI_DIV_3 << AXI_DIV_SHIFT |
 142                ATB_DIV_2 << ATB_DIV_SHIFT |
 143                CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
 144                &ccm->cpu_axi_cfg);
 145 }
 146 #endif
 147
 148 void clock_set_pll3(unsigned int clk)
 149 {
 150         struct sunxi_ccm_reg * const ccm =
 151                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 152 #ifdef CONFIG_SUNXI_DE2
 153         const int m = 4; /* 6 MHz steps to allow higher frequency for DE2 */
 154 #else
 155         const int m = 8; /* 3 MHz steps just like sun4i, sun5i and sun7i */
 156 #endif
 157
 158         if (clk == 0) {
 159                 clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN);
 160                 return;
 161         }
 162
 163         /* PLL3 rate = 24000000 * n / m */
 164         writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
 165                CCM_PLL3_CTRL_N(clk / (24000000 / m)) | CCM_PLL3_CTRL_M(m),
 166                &ccm->pll3_cfg);
 167 }
 168
 169 #ifdef CONFIG_SUNXI_DE2
 170 void clock_set_pll3_factors(int m, int n)
 171 {
 172         struct sunxi_ccm_reg * const ccm =
 173                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 174
 175         /* PLL3 rate = 24000000 * n / m */
 176         writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
 177                CCM_PLL3_CTRL_N(n) | CCM_PLL3_CTRL_M(m),
 178                &ccm->pll3_cfg);
 179
 180         while (!(readl(&ccm->pll3_cfg) & CCM_PLL3_CTRL_LOCK))
 181                 ;
 182 }
 183 #endif
 184
 185 void clock_set_pll5(unsigned int clk, bool sigma_delta_enable)
 186 {
 187         struct sunxi_ccm_reg * const ccm =
 188                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 189         const int max_n = 32;
 190         int k = 1, m = 2;
 191
 192 #ifdef CONFIG_MACH_SUNXI_H3_H5
 193         clrsetbits_le32(&ccm->pll5_tuning_cfg, CCM_PLL5_TUN_LOCK_TIME_MASK |
 194                         CCM_PLL5_TUN_INIT_FREQ_MASK,
 195                         CCM_PLL5_TUN_LOCK_TIME(2) | CCM_PLL5_TUN_INIT_FREQ(16));
 196 #endif
 197
 198         if (sigma_delta_enable)
 199                 writel(CCM_PLL5_PATTERN, &ccm->pll5_pattern_cfg);
 200
 201         /* PLL5 rate = 24000000 * n * k / m */
 202         if (clk > 24000000 * k * max_n / m) {
 203                 m = 1;
 204                 if (clk > 24000000 * k * max_n / m)
 205                         k = 2;
 206         }
 207         writel(CCM_PLL5_CTRL_EN |
 208                (sigma_delta_enable ? CCM_PLL5_CTRL_SIGMA_DELTA_EN : 0) |
 209                CCM_PLL5_CTRL_UPD |
 210                CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) |
 211                CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg);
 212
 213         udelay(5500);
 214 }
 215
 216 #ifdef CONFIG_MACH_SUN6I
 217 void clock_set_mipi_pll(unsigned int clk)
 218 {
 219         struct sunxi_ccm_reg * const ccm =
 220                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 221         unsigned int k, m, n, value, diff;
 222         unsigned best_k = 0, best_m = 0, best_n = 0, best_diff = 0xffffffff;
 223         unsigned int src = clock_get_pll3();
 224
 225         /* All calculations are in KHz to avoid overflows */
 226         clk /= 1000;
 227         src /= 1000;
 228
 229         /* Pick the closest lower clock */
 230         for (k = 1; k <= 4; k++) {
 231                 for (m = 1; m <= 16; m++) {
 232                         for (n = 1; n <= 16; n++) {
 233                                 value = src * n * k / m;
 234                                 if (value > clk)
 235                                         continue;
 236
 237                                 diff = clk - value;
 238                                 if (diff < best_diff) {
 239                                         best_diff = diff;
 240                                         best_k = k;
 241                                         best_m = m;
 242                                         best_n = n;
 243                                 }
 244                                 if (diff == 0)
 245                                         goto done;
 246                         }
 247                 }
 248         }
 249
 250 done:
 251         writel(CCM_MIPI_PLL_CTRL_EN | CCM_MIPI_PLL_CTRL_LDO_EN |
 252                CCM_MIPI_PLL_CTRL_N(best_n) | CCM_MIPI_PLL_CTRL_K(best_k) |
 253                CCM_MIPI_PLL_CTRL_M(best_m), &ccm->mipi_pll_cfg);
 254 }
 255 #endif
 256
 257 #ifdef CONFIG_SUNXI_DE2
 258 void clock_set_pll10(unsigned int clk)
 259 {
 260         struct sunxi_ccm_reg * const ccm =
 261                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 262         const int m = 2; /* 12 MHz steps */
 263
 264         if (clk == 0) {
 265                 clrbits_le32(&ccm->pll10_cfg, CCM_PLL10_CTRL_EN);
 266                 return;
 267         }
 268
 269         /* PLL10 rate = 24000000 * n / m */
 270         writel(CCM_PLL10_CTRL_EN | CCM_PLL10_CTRL_INTEGER_MODE |
 271                CCM_PLL10_CTRL_N(clk / (24000000 / m)) | CCM_PLL10_CTRL_M(m),
 272                &ccm->pll10_cfg);
 273
 274         while (!(readl(&ccm->pll10_cfg) & CCM_PLL10_CTRL_LOCK))
 275                 ;
 276 }
 277 #endif
 278
 279 #if defined(CONFIG_MACH_SUN8I_A33) || \
 280     defined(CONFIG_MACH_SUN8I_R40) || \
 281     defined(CONFIG_MACH_SUN50I)
 282 void clock_set_pll11(unsigned int clk, bool sigma_delta_enable)
 283 {
 284         struct sunxi_ccm_reg * const ccm =
 285                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 286
 287         if (sigma_delta_enable)
 288                 writel(CCM_PLL11_PATTERN, &ccm->pll11_pattern_cfg0);
 289
 290         writel(CCM_PLL11_CTRL_EN | CCM_PLL11_CTRL_UPD |
 291                (sigma_delta_enable ? CCM_PLL11_CTRL_SIGMA_DELTA_EN : 0) |
 292                CCM_PLL11_CTRL_N(clk / 24000000), &ccm->pll11_cfg);
 293
 294         while (readl(&ccm->pll11_cfg) & CCM_PLL11_CTRL_UPD)
 295                 ;
 296 }
 297 #endif
 298
 299 unsigned int clock_get_pll3(void)
 300 {
 301         struct sunxi_ccm_reg *const ccm =
 302                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 303         uint32_t rval = readl(&ccm->pll3_cfg);
 304         int n = ((rval & CCM_PLL3_CTRL_N_MASK) >> CCM_PLL3_CTRL_N_SHIFT) + 1;
 305         int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT) + 1;
 306
 307         /* Multiply by 1000 after dividing by m to avoid integer overflows */
 308         return (24000 * n / m) * 1000;
 309 }
 310
 311 unsigned int clock_get_pll6(void)
 312 {
 313         struct sunxi_ccm_reg *const ccm =
 314                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 315         uint32_t rval = readl(&ccm->pll6_cfg);
 316         int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1;
 317         int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
 318         return 24000000 * n * k / 2;
 319 }
 320
 321 unsigned int clock_get_mipi_pll(void)
 322 {
 323         struct sunxi_ccm_reg *const ccm =
 324                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 325         uint32_t rval = readl(&ccm->mipi_pll_cfg);
 326         unsigned int n = ((rval & CCM_MIPI_PLL_CTRL_N_MASK) >> CCM_MIPI_PLL_CTRL_N_SHIFT) + 1;
 327         unsigned int k = ((rval & CCM_MIPI_PLL_CTRL_K_MASK) >> CCM_MIPI_PLL_CTRL_K_SHIFT) + 1;
 328         unsigned int m = ((rval & CCM_MIPI_PLL_CTRL_M_MASK) >> CCM_MIPI_PLL_CTRL_M_SHIFT) + 1;
 329         unsigned int src = clock_get_pll3();
 330
 331         /* Multiply by 1000 after dividing by m to avoid integer overflows */
 332         return ((src / 1000) * n * k / m) * 1000;
 333 }
 334
 335 void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz)
 336 {
 337         int pll = clock_get_pll6() * 2;
 338         int div = 1;
 339
 340         while ((pll / div) > hz)
 341                 div++;
 342
 343         writel(CCM_DE_CTRL_GATE | CCM_DE_CTRL_PLL6_2X | CCM_DE_CTRL_M(div),
 344                clk_cfg);
 345 }