mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* sun4i, sun5i and sun7i 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/gpio.h>
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#include <asm/arch/sys_proto.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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/* Set safe defaults until PMU is configured */
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writel(AXI_DIV_1 << AXI_DIV_SHIFT |
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AHB_DIV_2 << AHB_DIV_SHIFT |
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APB0_DIV_1 << APB0_DIV_SHIFT |
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CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_ahb_apb0_cfg);
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writel(PLL1_CFG_DEFAULT, &ccm->pll1_cfg);
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sdelay(200);
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writel(AXI_DIV_1 << AXI_DIV_SHIFT |
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AHB_DIV_2 << AHB_DIV_SHIFT |
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APB0_DIV_1 << APB0_DIV_SHIFT |
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CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_ahb_apb0_cfg);
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#ifdef CONFIG_MACH_SUN7I
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setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_DMA);
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#endif
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writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
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#ifdef CONFIG_SUNXI_AHCI
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setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_SATA);
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setbits_le32(&ccm->pll6_cfg, 0x1 << CCM_PLL6_CTRL_SATA_EN_SHIFT);
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#endif
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}
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#endif
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void clock_init_uart(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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/* uart clock source is apb1 */
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writel(APB1_CLK_SRC_OSC24M|
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APB1_CLK_RATE_N_1|
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APB1_CLK_RATE_M(1),
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&ccm->apb1_clk_div_cfg);
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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+CONFIG_CONS_INDEX - 1));
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}
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int clock_twi_onoff(int port, int state)
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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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/* set the apb clock gate for twi */
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if (state)
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setbits_le32(&ccm->apb1_gate,
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CLK_GATE_OPEN << (APB1_GATE_TWI_SHIFT + port));
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else
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clrbits_le32(&ccm->apb1_gate,
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CLK_GATE_OPEN << (APB1_GATE_TWI_SHIFT + port));
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return 0;
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}
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#ifdef CONFIG_SPL_BUILD
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#define PLL1_CFG(N, K, M, P) ( 1 << CCM_PLL1_CFG_ENABLE_SHIFT | \
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0 << CCM_PLL1_CFG_VCO_RST_SHIFT | \
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8 << CCM_PLL1_CFG_VCO_BIAS_SHIFT | \
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0 << CCM_PLL1_CFG_PLL4_EXCH_SHIFT | \
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16 << CCM_PLL1_CFG_BIAS_CUR_SHIFT | \
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(P)<< CCM_PLL1_CFG_DIVP_SHIFT | \
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2 << CCM_PLL1_CFG_LCK_TMR_SHIFT | \
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(N)<< CCM_PLL1_CFG_FACTOR_N_SHIFT | \
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(K)<< CCM_PLL1_CFG_FACTOR_K_SHIFT | \
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0 << CCM_PLL1_CFG_SIG_DELT_PAT_IN_SHIFT | \
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0 << CCM_PLL1_CFG_SIG_DELT_PAT_EN_SHIFT | \
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(M)<< CCM_PLL1_CFG_FACTOR_M_SHIFT)
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static struct {
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u32 pll1_cfg;
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unsigned int freq;
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} pll1_para[] = {
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/* This array must be ordered by frequency. */
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{ PLL1_CFG(31, 1, 0, 0), 1488000000},
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{ PLL1_CFG(30, 1, 0, 0), 1440000000},
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{ PLL1_CFG(29, 1, 0, 0), 1392000000},
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{ PLL1_CFG(28, 1, 0, 0), 1344000000},
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{ PLL1_CFG(27, 1, 0, 0), 1296000000},
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{ PLL1_CFG(26, 1, 0, 0), 1248000000},
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{ PLL1_CFG(25, 1, 0, 0), 1200000000},
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{ PLL1_CFG(24, 1, 0, 0), 1152000000},
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{ PLL1_CFG(23, 1, 0, 0), 1104000000},
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{ PLL1_CFG(22, 1, 0, 0), 1056000000},
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{ PLL1_CFG(21, 1, 0, 0), 1008000000},
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{ PLL1_CFG(20, 1, 0, 0), 960000000 },
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{ PLL1_CFG(19, 1, 0, 0), 912000000 },
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{ PLL1_CFG(16, 1, 0, 0), 768000000 },
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/* Final catchall entry 384MHz*/
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{ PLL1_CFG(16, 0, 0, 0), 0 },
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};
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void clock_set_pll1(unsigned int hz)
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{
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int i = 0;
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int axi, ahb, apb0;
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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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/* Find target frequency */
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while (pll1_para[i].freq > hz)
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i++;
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hz = pll1_para[i].freq;
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if (! hz)
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hz = 384000000;
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/* Calculate system clock divisors */
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axi = DIV_ROUND_UP(hz, 432000000); /* Max 450MHz */
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ahb = DIV_ROUND_UP(hz/axi, 204000000); /* Max 250MHz */
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apb0 = 2; /* Max 150MHz */
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printf("CPU: %uHz, AXI/AHB/APB: %d/%d/%d\n", hz, axi, ahb, apb0);
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/* Map divisors to register values */
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axi = axi - 1;
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if (ahb > 4)
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ahb = 3;
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else if (ahb > 2)
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ahb = 2;
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else if (ahb > 1)
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ahb = 1;
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else
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ahb = 0;
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apb0 = apb0 - 1;
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/* Switch to 24MHz clock while changing PLL1 */
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writel(AXI_DIV_1 << AXI_DIV_SHIFT |
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AHB_DIV_2 << AHB_DIV_SHIFT |
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APB0_DIV_1 << APB0_DIV_SHIFT |
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CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_ahb_apb0_cfg);
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sdelay(20);
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/* Configure sys clock divisors */
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writel(axi << AXI_DIV_SHIFT |
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ahb << AHB_DIV_SHIFT |
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apb0 << APB0_DIV_SHIFT |
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CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_ahb_apb0_cfg);
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/* Configure PLL1 at the desired frequency */
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writel(pll1_para[i].pll1_cfg, &ccm->pll1_cfg);
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sdelay(200);
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/* Switch CPU to PLL1 */
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writel(axi << AXI_DIV_SHIFT |
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ahb << AHB_DIV_SHIFT |
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apb0 << APB0_DIV_SHIFT |
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CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
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&ccm->cpu_ahb_apb0_cfg);
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sdelay(20);
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}
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#endif
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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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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 = 3000000 * m */
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writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
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CCM_PLL3_CTRL_M(clk / 3000000), &ccm->pll3_cfg);
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}
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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 m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT);
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return 3000000 * m;
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}
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unsigned int clock_get_pll5p(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->pll5_cfg);
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int n = ((rval & CCM_PLL5_CTRL_N_MASK) >> CCM_PLL5_CTRL_N_SHIFT);
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int k = ((rval & CCM_PLL5_CTRL_K_MASK) >> CCM_PLL5_CTRL_K_SHIFT) + 1;
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int p = ((rval & CCM_PLL5_CTRL_P_MASK) >> CCM_PLL5_CTRL_P_SHIFT);
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return (24000000 * n * k) >> p;
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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);
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int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
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return 24000000 * n * k / 2;
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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_pll5p();
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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_RST | CCM_DE_CTRL_PLL5P |
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CCM_DE_CTRL_M(div), clk_cfg);
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}
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