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https://github.com/AsahiLinux/u-boot
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64531496f9
The legacy Allwinner code is cluttered with #ifdef's, some of them even nested, which makes the code hard to read and error prone. Eventually we will get rid of most of them, but for now let's at least annotate the #endif lines with the corresponding symbol the bracket started with. Reviewed-by: Samuel Holland <samuel@sholland.org> Tested-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
377 lines
10 KiB
C
377 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* sun6i specific clock code
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*
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* (C) Copyright 2007-2012
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Tom Cubie <tangliang@allwinnertech.com>
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*
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* (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/prcm.h>
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#include <asm/arch/sys_proto.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#ifdef CONFIG_SPL_BUILD
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void clock_init_safe(void)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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#if !defined(CONFIG_MACH_SUNXI_H3_H5) && !defined(CONFIG_MACH_SUN50I) && \
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!defined(CONFIG_MACH_SUNIV)
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struct sunxi_prcm_reg * const prcm =
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(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
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/* Set PLL ldo voltage without this PLL6 does not work properly */
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clrsetbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK,
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PRCM_PLL_CTRL_LDO_KEY);
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clrsetbits_le32(&prcm->pll_ctrl1, ~PRCM_PLL_CTRL_LDO_KEY_MASK,
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PRCM_PLL_CTRL_LDO_DIGITAL_EN | PRCM_PLL_CTRL_LDO_ANALOG_EN |
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PRCM_PLL_CTRL_EXT_OSC_EN | PRCM_PLL_CTRL_LDO_OUT_L(1140));
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clrbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK);
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#endif
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#if defined(CONFIG_MACH_SUN8I_R40) || defined(CONFIG_MACH_SUN50I)
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/* Set PLL lock enable bits and switch to old lock mode */
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writel(GENMASK(12, 0), &ccm->pll_lock_ctrl);
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#endif
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clock_set_pll1(408000000);
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writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
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while (!(readl(&ccm->pll6_cfg) & CCM_PLL6_CTRL_LOCK))
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;
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writel(AHB1_ABP1_DIV_DEFAULT, &ccm->ahb1_apb1_div);
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if (!IS_ENABLED(CONFIG_MACH_SUNIV)) {
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writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg);
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if (IS_ENABLED(CONFIG_MACH_SUN6I))
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writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg);
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}
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#if defined(CONFIG_MACH_SUN8I_R40) && defined(CONFIG_SUNXI_AHCI)
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setbits_le32(&ccm->sata_pll_cfg, CCM_SATA_PLL_DEFAULT);
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setbits_le32(&ccm->ahb_reset0_cfg, 0x1 << AHB_GATE_OFFSET_SATA);
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setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_SATA);
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setbits_le32(&ccm->sata_clk_cfg, CCM_SATA_CTRL_ENABLE);
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#endif
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}
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#endif /* CONFIG_SPL_BUILD */
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void clock_init_sec(void)
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{
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#ifdef CONFIG_MACH_SUNXI_H3_H5
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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struct sunxi_prcm_reg * const prcm =
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(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
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setbits_le32(&ccm->ccu_sec_switch,
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CCM_SEC_SWITCH_MBUS_NONSEC |
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CCM_SEC_SWITCH_BUS_NONSEC |
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CCM_SEC_SWITCH_PLL_NONSEC);
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setbits_le32(&prcm->prcm_sec_switch,
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PRCM_SEC_SWITCH_APB0_CLK_NONSEC |
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PRCM_SEC_SWITCH_PLL_CFG_NONSEC |
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PRCM_SEC_SWITCH_PWR_GATE_NONSEC);
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#endif
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}
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void clock_init_uart(void)
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{
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#if CONFIG_CONS_INDEX < 5
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struct sunxi_ccm_reg *const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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#ifdef CONFIG_MACH_SUNIV
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/* suniv doesn't have apb2, UART clock source is always apb1 */
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/* open the clock for uart */
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setbits_le32(&ccm->apb1_gate,
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CLK_GATE_OPEN << (APB1_GATE_UART_SHIFT +
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CONFIG_CONS_INDEX - 1));
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/* deassert uart reset */
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setbits_le32(&ccm->apb1_reset_cfg,
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1 << (APB1_RESET_UART_SHIFT +
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CONFIG_CONS_INDEX - 1));
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#else
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/* uart clock source is apb2 */
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writel(APB2_CLK_SRC_OSC24M|
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APB2_CLK_RATE_N_1|
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APB2_CLK_RATE_M(1),
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&ccm->apb2_div);
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/* open the clock for uart */
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setbits_le32(&ccm->apb2_gate,
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CLK_GATE_OPEN << (APB2_GATE_UART_SHIFT +
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CONFIG_CONS_INDEX - 1));
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/* deassert uart reset */
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setbits_le32(&ccm->apb2_reset_cfg,
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1 << (APB2_RESET_UART_SHIFT +
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CONFIG_CONS_INDEX - 1));
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#endif /* !CONFIG_MACH_SUNIV */
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#else /* CONFIG_CONS_INDEX >= 5 */
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/* enable R_PIO and R_UART clocks, and de-assert resets */
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prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_UART);
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#endif
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}
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#ifdef CONFIG_SPL_BUILD
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void clock_set_pll1(unsigned int clk)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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const int p = 0;
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int k = 1;
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int m = 1;
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if (clk > 1152000000) {
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k = 2;
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} else if (clk > 768000000) {
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k = 4;
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m = 2;
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}
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/* Switch to 24MHz clock while changing PLL1 */
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if (IS_ENABLED(CONFIG_MACH_SUNIV)) {
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writel(CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_axi_cfg);
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} else {
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writel(AXI_DIV_3 << AXI_DIV_SHIFT |
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ATB_DIV_2 << ATB_DIV_SHIFT |
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CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_axi_cfg);
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}
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/*
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* sun6i: PLL1 rate = ((24000000 * n * k) >> 0) / m (p is ignored)
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* sun8i: PLL1 rate = ((24000000 * n * k) >> p) / m
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*/
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writel(CCM_PLL1_CTRL_EN | CCM_PLL1_CTRL_P(p) |
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CCM_PLL1_CTRL_N(clk / (24000000 * k / m)) |
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CCM_PLL1_CTRL_K(k) | CCM_PLL1_CTRL_M(m), &ccm->pll1_cfg);
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sdelay(200);
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/* Switch CPU to PLL1 */
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if (IS_ENABLED(CONFIG_MACH_SUNIV)) {
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writel(CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_axi_cfg);
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} else {
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writel(AXI_DIV_3 << AXI_DIV_SHIFT |
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ATB_DIV_2 << ATB_DIV_SHIFT |
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CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_axi_cfg);
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}
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}
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#endif /* CONFIG_SPL_BUILD */
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void clock_set_pll3(unsigned int clk)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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#ifdef CONFIG_SUNXI_DE2
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const int m = 4; /* 6 MHz steps to allow higher frequency for DE2 */
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#else
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const int m = 8; /* 3 MHz steps just like sun4i, sun5i and sun7i */
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#endif
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if (clk == 0) {
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clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN);
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return;
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}
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/* PLL3 rate = 24000000 * n / m */
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writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
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CCM_PLL3_CTRL_N(clk / (24000000 / m)) | CCM_PLL3_CTRL_M(m),
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&ccm->pll3_cfg);
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}
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#ifdef CONFIG_SUNXI_DE2
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void clock_set_pll3_factors(int m, int n)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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/* PLL3 rate = 24000000 * n / m */
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writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
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CCM_PLL3_CTRL_N(n) | CCM_PLL3_CTRL_M(m),
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&ccm->pll3_cfg);
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while (!(readl(&ccm->pll3_cfg) & CCM_PLL3_CTRL_LOCK))
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;
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}
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#endif
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void clock_set_pll5(unsigned int clk, bool sigma_delta_enable)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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const int max_n = 32;
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int k = 1, m = 2;
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#ifdef CONFIG_MACH_SUNXI_H3_H5
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clrsetbits_le32(&ccm->pll5_tuning_cfg, CCM_PLL5_TUN_LOCK_TIME_MASK |
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CCM_PLL5_TUN_INIT_FREQ_MASK,
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CCM_PLL5_TUN_LOCK_TIME(2) | CCM_PLL5_TUN_INIT_FREQ(16));
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#endif
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if (sigma_delta_enable)
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writel(CCM_PLL5_PATTERN, &ccm->pll5_pattern_cfg);
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/* PLL5 rate = 24000000 * n * k / m */
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if (clk > 24000000 * k * max_n / m) {
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m = 1;
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if (clk > 24000000 * k * max_n / m)
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k = 2;
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}
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writel(CCM_PLL5_CTRL_EN |
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(sigma_delta_enable ? CCM_PLL5_CTRL_SIGMA_DELTA_EN : 0) |
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CCM_PLL5_CTRL_UPD |
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CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) |
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CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg);
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udelay(5500);
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}
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#ifdef CONFIG_MACH_SUN6I
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void clock_set_mipi_pll(unsigned int clk)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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unsigned int k, m, n, value, diff;
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unsigned best_k = 0, best_m = 0, best_n = 0, best_diff = 0xffffffff;
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unsigned int src = clock_get_pll3();
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/* All calculations are in KHz to avoid overflows */
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clk /= 1000;
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src /= 1000;
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/* Pick the closest lower clock */
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for (k = 1; k <= 4; k++) {
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for (m = 1; m <= 16; m++) {
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for (n = 1; n <= 16; n++) {
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value = src * n * k / m;
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if (value > clk)
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continue;
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diff = clk - value;
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if (diff < best_diff) {
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best_diff = diff;
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best_k = k;
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best_m = m;
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best_n = n;
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}
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if (diff == 0)
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goto done;
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}
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}
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}
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done:
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writel(CCM_MIPI_PLL_CTRL_EN | CCM_MIPI_PLL_CTRL_LDO_EN |
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CCM_MIPI_PLL_CTRL_N(best_n) | CCM_MIPI_PLL_CTRL_K(best_k) |
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CCM_MIPI_PLL_CTRL_M(best_m), &ccm->mipi_pll_cfg);
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}
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#endif
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#ifdef CONFIG_SUNXI_DE2
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void clock_set_pll10(unsigned int clk)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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const int m = 2; /* 12 MHz steps */
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if (clk == 0) {
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clrbits_le32(&ccm->pll10_cfg, CCM_PLL10_CTRL_EN);
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return;
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}
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/* PLL10 rate = 24000000 * n / m */
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writel(CCM_PLL10_CTRL_EN | CCM_PLL10_CTRL_INTEGER_MODE |
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CCM_PLL10_CTRL_N(clk / (24000000 / m)) | CCM_PLL10_CTRL_M(m),
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&ccm->pll10_cfg);
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while (!(readl(&ccm->pll10_cfg) & CCM_PLL10_CTRL_LOCK))
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;
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}
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#endif
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#if defined(CONFIG_MACH_SUN8I_A33) || \
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defined(CONFIG_MACH_SUN8I_R40) || \
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defined(CONFIG_MACH_SUN50I)
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void clock_set_pll11(unsigned int clk, bool sigma_delta_enable)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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if (sigma_delta_enable)
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writel(CCM_PLL11_PATTERN, &ccm->pll11_pattern_cfg0);
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writel(CCM_PLL11_CTRL_EN | CCM_PLL11_CTRL_UPD |
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(sigma_delta_enable ? CCM_PLL11_CTRL_SIGMA_DELTA_EN : 0) |
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CCM_PLL11_CTRL_N(clk / 24000000), &ccm->pll11_cfg);
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while (readl(&ccm->pll11_cfg) & CCM_PLL11_CTRL_UPD)
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;
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}
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#endif
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unsigned int clock_get_pll3(void)
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{
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struct sunxi_ccm_reg *const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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uint32_t rval = readl(&ccm->pll3_cfg);
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int n = ((rval & CCM_PLL3_CTRL_N_MASK) >> CCM_PLL3_CTRL_N_SHIFT) + 1;
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int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT) + 1;
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/* Multiply by 1000 after dividing by m to avoid integer overflows */
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return (24000 * n / m) * 1000;
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}
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unsigned int clock_get_pll6(void)
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{
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struct sunxi_ccm_reg *const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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uint32_t rval = readl(&ccm->pll6_cfg);
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int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1;
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int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
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if (IS_ENABLED(CONFIG_MACH_SUNIV))
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return 24000000 * n * k;
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else
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return 24000000 * n * k / 2;
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}
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unsigned int clock_get_mipi_pll(void)
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{
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struct sunxi_ccm_reg *const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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uint32_t rval = readl(&ccm->mipi_pll_cfg);
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unsigned int n = ((rval & CCM_MIPI_PLL_CTRL_N_MASK) >> CCM_MIPI_PLL_CTRL_N_SHIFT) + 1;
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unsigned int k = ((rval & CCM_MIPI_PLL_CTRL_K_MASK) >> CCM_MIPI_PLL_CTRL_K_SHIFT) + 1;
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unsigned int m = ((rval & CCM_MIPI_PLL_CTRL_M_MASK) >> CCM_MIPI_PLL_CTRL_M_SHIFT) + 1;
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unsigned int src = clock_get_pll3();
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/* Multiply by 1000 after dividing by m to avoid integer overflows */
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return ((src / 1000) * n * k / m) * 1000;
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}
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void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz)
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{
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int pll = clock_get_pll6() * 2;
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int div = 1;
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while ((pll / div) > hz)
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div++;
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writel(CCM_DE_CTRL_GATE | CCM_DE_CTRL_PLL6_2X | CCM_DE_CTRL_M(div),
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clk_cfg);
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}
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