diff options
Diffstat (limited to 'arch/arm/mach-sunxi/clock_sun6i.c')
| -rw-r--r-- | arch/arm/mach-sunxi/clock_sun6i.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/arch/arm/mach-sunxi/clock_sun6i.c b/arch/arm/mach-sunxi/clock_sun6i.c new file mode 100644 index 0000000000..15272c9e71 --- /dev/null +++ b/arch/arm/mach-sunxi/clock_sun6i.c @@ -0,0 +1,274 @@ +/* + * sun6i specific clock code + * + * (C) Copyright 2007-2012 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie <tangliang@allwinnertech.com> + * + * (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/prcm.h> +#include <asm/arch/sys_proto.h> + +#ifdef CONFIG_SPL_BUILD +void clock_init_safe(void) +{ + struct sunxi_ccm_reg * const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + 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); + + 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); + 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; + + 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); +} |