/* * sun6i specific clock code * * (C) Copyright 2007-2012 * Allwinner Technology Co., Ltd. * Tom Cubie * * (C) Copyright 2013 Luke Kenneth Casson Leighton * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #ifdef CONFIG_SPL_BUILD void clock_init_safe(void) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; #if !defined(CONFIG_MACH_SUN8I_H3) && !defined(CONFIG_MACH_SUN50I) struct sunxi_prcm_reg * const prcm = (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE; /* Set PLL ldo voltage without this PLL6 does not work properly */ clrsetbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK, PRCM_PLL_CTRL_LDO_KEY); clrsetbits_le32(&prcm->pll_ctrl1, ~PRCM_PLL_CTRL_LDO_KEY_MASK, PRCM_PLL_CTRL_LDO_DIGITAL_EN | PRCM_PLL_CTRL_LDO_ANALOG_EN | PRCM_PLL_CTRL_EXT_OSC_EN | PRCM_PLL_CTRL_LDO_OUT_L(1140)); clrbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK); #endif clock_set_pll1(408000000); writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg); while (!(readl(&ccm->pll6_cfg) & CCM_PLL6_CTRL_LOCK)) ; writel(AHB1_ABP1_DIV_DEFAULT, &ccm->ahb1_apb1_div); writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg); if (IS_ENABLED(CONFIG_MACH_SUN6I)) writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg); } #endif void clock_init_sec(void) { #ifdef CONFIG_MACH_SUN8I_H3 struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; setbits_le32(&ccm->ccu_sec_switch, CCM_SEC_SWITCH_MBUS_NONSEC | CCM_SEC_SWITCH_BUS_NONSEC | CCM_SEC_SWITCH_PLL_NONSEC); #endif } void clock_init_uart(void) { #if CONFIG_CONS_INDEX < 5 struct sunxi_ccm_reg *const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; /* uart clock source is apb2 */ writel(APB2_CLK_SRC_OSC24M| APB2_CLK_RATE_N_1| APB2_CLK_RATE_M(1), &ccm->apb2_div); /* open the clock for uart */ setbits_le32(&ccm->apb2_gate, CLK_GATE_OPEN << (APB2_GATE_UART_SHIFT + CONFIG_CONS_INDEX - 1)); /* deassert uart reset */ setbits_le32(&ccm->apb2_reset_cfg, 1 << (APB2_RESET_UART_SHIFT + CONFIG_CONS_INDEX - 1)); #else /* enable R_PIO and R_UART clocks, and de-assert resets */ prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_UART); #endif } #ifdef CONFIG_SPL_BUILD void clock_set_pll1(unsigned int clk) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; const int p = 0; int k = 1; int m = 1; if (clk > 1152000000) { k = 2; } else if (clk > 768000000) { k = 3; m = 2; } /* Switch to 24MHz clock while changing PLL1 */ writel(AXI_DIV_3 << AXI_DIV_SHIFT | ATB_DIV_2 << ATB_DIV_SHIFT | CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT, &ccm->cpu_axi_cfg); /* * sun6i: PLL1 rate = ((24000000 * n * k) >> 0) / m (p is ignored) * sun8i: PLL1 rate = ((24000000 * n * k) >> p) / m */ writel(CCM_PLL1_CTRL_EN | CCM_PLL1_CTRL_P(p) | CCM_PLL1_CTRL_N(clk / (24000000 * k / m)) | CCM_PLL1_CTRL_K(k) | CCM_PLL1_CTRL_M(m), &ccm->pll1_cfg); sdelay(200); /* Switch CPU to PLL1 */ writel(AXI_DIV_3 << AXI_DIV_SHIFT | ATB_DIV_2 << ATB_DIV_SHIFT | CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT, &ccm->cpu_axi_cfg); } #endif void clock_set_pll3(unsigned int clk) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; const int m = 8; /* 3 MHz steps just like sun4i, sun5i and sun7i */ if (clk == 0) { clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN); return; } /* PLL3 rate = 24000000 * n / m */ writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE | CCM_PLL3_CTRL_N(clk / (24000000 / m)) | CCM_PLL3_CTRL_M(m), &ccm->pll3_cfg); } void clock_set_pll5(unsigned int clk, bool sigma_delta_enable) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; const int max_n = 32; int k = 1, m = 2; #ifdef CONFIG_MACH_SUN8I_H3 clrsetbits_le32(&ccm->pll5_tuning_cfg, CCM_PLL5_TUN_LOCK_TIME_MASK | CCM_PLL5_TUN_INIT_FREQ_MASK, CCM_PLL5_TUN_LOCK_TIME(2) | CCM_PLL5_TUN_INIT_FREQ(16)); #endif if (sigma_delta_enable) writel(CCM_PLL5_PATTERN, &ccm->pll5_pattern_cfg); /* PLL5 rate = 24000000 * n * k / m */ if (clk > 24000000 * k * max_n / m) { m = 1; if (clk > 24000000 * k * max_n / m) k = 2; } writel(CCM_PLL5_CTRL_EN | (sigma_delta_enable ? CCM_PLL5_CTRL_SIGMA_DELTA_EN : 0) | CCM_PLL5_CTRL_UPD | CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) | CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg); udelay(5500); } #ifdef CONFIG_MACH_SUN6I void clock_set_mipi_pll(unsigned int clk) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; unsigned int k, m, n, value, diff; unsigned best_k = 0, best_m = 0, best_n = 0, best_diff = 0xffffffff; unsigned int src = clock_get_pll3(); /* All calculations are in KHz to avoid overflows */ clk /= 1000; src /= 1000; /* Pick the closest lower clock */ for (k = 1; k <= 4; k++) { for (m = 1; m <= 16; m++) { for (n = 1; n <= 16; n++) { value = src * n * k / m; if (value > clk) continue; diff = clk - value; if (diff < best_diff) { best_diff = diff; best_k = k; best_m = m; best_n = n; } if (diff == 0) goto done; } } } done: writel(CCM_MIPI_PLL_CTRL_EN | CCM_MIPI_PLL_CTRL_LDO_EN | CCM_MIPI_PLL_CTRL_N(best_n) | CCM_MIPI_PLL_CTRL_K(best_k) | CCM_MIPI_PLL_CTRL_M(best_m), &ccm->mipi_pll_cfg); } #endif #ifdef CONFIG_MACH_SUN8I_A33 void clock_set_pll11(unsigned int clk, bool sigma_delta_enable) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; if (sigma_delta_enable) writel(CCM_PLL11_PATTERN, &ccm->pll5_pattern_cfg); writel(CCM_PLL11_CTRL_EN | CCM_PLL11_CTRL_UPD | (sigma_delta_enable ? CCM_PLL11_CTRL_SIGMA_DELTA_EN : 0) | CCM_PLL11_CTRL_N(clk / 24000000), &ccm->pll11_cfg); while (readl(&ccm->pll11_cfg) & CCM_PLL11_CTRL_UPD) ; } #endif unsigned int clock_get_pll3(void) { struct sunxi_ccm_reg *const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; uint32_t rval = readl(&ccm->pll3_cfg); int n = ((rval & CCM_PLL3_CTRL_N_MASK) >> CCM_PLL3_CTRL_N_SHIFT) + 1; int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT) + 1; /* Multiply by 1000 after dividing by m to avoid integer overflows */ return (24000 * n / m) * 1000; } unsigned int clock_get_pll6(void) { struct sunxi_ccm_reg *const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; uint32_t rval = readl(&ccm->pll6_cfg); int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1; int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1; return 24000000 * n * k / 2; } unsigned int clock_get_mipi_pll(void) { struct sunxi_ccm_reg *const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; uint32_t rval = readl(&ccm->mipi_pll_cfg); unsigned int n = ((rval & CCM_MIPI_PLL_CTRL_N_MASK) >> CCM_MIPI_PLL_CTRL_N_SHIFT) + 1; unsigned int k = ((rval & CCM_MIPI_PLL_CTRL_K_MASK) >> CCM_MIPI_PLL_CTRL_K_SHIFT) + 1; unsigned int m = ((rval & CCM_MIPI_PLL_CTRL_M_MASK) >> CCM_MIPI_PLL_CTRL_M_SHIFT) + 1; unsigned int src = clock_get_pll3(); /* Multiply by 1000 after dividing by m to avoid integer overflows */ return ((src / 1000) * n * k / m) * 1000; } void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz) { int pll = clock_get_pll6() * 2; int div = 1; while ((pll / div) > hz) div++; writel(CCM_DE_CTRL_GATE | CCM_DE_CTRL_PLL6_2X | CCM_DE_CTRL_M(div), clk_cfg); }