arch/arm/mach-sunxi/clock_sun4i.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * sun4i, sun5i and sun7i 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>
  */

 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/clock.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;

 	/* Set safe defaults until PMU is configured */
 	writel(AXI_DIV_1 << AXI_DIV_SHIFT |
 	       AHB_DIV_2 << AHB_DIV_SHIFT |
 	       APB0_DIV_1 << APB0_DIV_SHIFT |
 	       CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
 	       &ccm->cpu_ahb_apb0_cfg);
 	writel(PLL1_CFG_DEFAULT, &ccm->pll1_cfg);
 	sdelay(200);
 	writel(AXI_DIV_1 << AXI_DIV_SHIFT |
 	       AHB_DIV_2 << AHB_DIV_SHIFT |
 	       APB0_DIV_1 << APB0_DIV_SHIFT |
 	       CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
 	       &ccm->cpu_ahb_apb0_cfg);
 #ifdef CONFIG_MACH_SUN7I
 	setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_DMA);
 #endif
 	writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
 #ifdef CONFIG_SUNXI_AHCI
 	setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_SATA);
 	setbits_le32(&ccm->pll6_cfg, 0x1 << CCM_PLL6_CTRL_SATA_EN_SHIFT);
 #endif
 }
 #endif

 void clock_init_uart(void)
 {
 	struct sunxi_ccm_reg *const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

 	/* uart clock source is apb1 */
 	writel(APB1_CLK_SRC_OSC24M|
 	       APB1_CLK_RATE_N_1|
 	       APB1_CLK_RATE_M(1),
 	       &ccm->apb1_clk_div_cfg);

 	/* open the clock for uart */
 	setbits_le32(&ccm->apb1_gate,
 		CLK_GATE_OPEN << (APB1_GATE_UART_SHIFT+CONFIG_CONS_INDEX - 1));
 }

 int clock_twi_onoff(int port, int state)
 {
 	struct sunxi_ccm_reg *const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

 	/* set the apb clock gate for twi */
 	if (state)
 		setbits_le32(&ccm->apb1_gate,
 			     CLK_GATE_OPEN << (APB1_GATE_TWI_SHIFT + port));
 	else
 		clrbits_le32(&ccm->apb1_gate,
 			     CLK_GATE_OPEN << (APB1_GATE_TWI_SHIFT + port));

 	return 0;
 }

 #ifdef CONFIG_SPL_BUILD
 #define PLL1_CFG(N, K, M, P)	( 1 << CCM_PLL1_CFG_ENABLE_SHIFT | \
 				  0 << CCM_PLL1_CFG_VCO_RST_SHIFT |  \
 				  8 << CCM_PLL1_CFG_VCO_BIAS_SHIFT | \
 				  0 << CCM_PLL1_CFG_PLL4_EXCH_SHIFT | \
 				 16 << CCM_PLL1_CFG_BIAS_CUR_SHIFT | \
 				 (P)<< CCM_PLL1_CFG_DIVP_SHIFT | \
 				  2 << CCM_PLL1_CFG_LCK_TMR_SHIFT | \
 				 (N)<< CCM_PLL1_CFG_FACTOR_N_SHIFT | \
 				 (K)<< CCM_PLL1_CFG_FACTOR_K_SHIFT | \
 				  0 << CCM_PLL1_CFG_SIG_DELT_PAT_IN_SHIFT | \
 				  0 << CCM_PLL1_CFG_SIG_DELT_PAT_EN_SHIFT | \
 				 (M)<< CCM_PLL1_CFG_FACTOR_M_SHIFT)

 static struct {
 	u32 pll1_cfg;
 	unsigned int freq;
 } pll1_para[] = {
 	/* This array must be ordered by frequency. */
 	{ PLL1_CFG(31, 1, 0, 0), 1488000000},
 	{ PLL1_CFG(30, 1, 0, 0), 1440000000},
 	{ PLL1_CFG(29, 1, 0, 0), 1392000000},
 	{ PLL1_CFG(28, 1, 0, 0), 1344000000},
 	{ PLL1_CFG(27, 1, 0, 0), 1296000000},
 	{ PLL1_CFG(26, 1, 0, 0), 1248000000},
 	{ PLL1_CFG(25, 1, 0, 0), 1200000000},
 	{ PLL1_CFG(24, 1, 0, 0), 1152000000},
 	{ PLL1_CFG(23, 1, 0, 0), 1104000000},
 	{ PLL1_CFG(22, 1, 0, 0), 1056000000},
 	{ PLL1_CFG(21, 1, 0, 0), 1008000000},
 	{ PLL1_CFG(20, 1, 0, 0), 960000000 },
 	{ PLL1_CFG(19, 1, 0, 0), 912000000 },
 	{ PLL1_CFG(16, 1, 0, 0), 768000000 },
 	/* Final catchall entry 384MHz*/
 	{ PLL1_CFG(16, 0, 0, 0), 0 },

 };

 void clock_set_pll1(unsigned int hz)
 {
 	int i = 0;
 	int axi, ahb, apb0;
 	struct sunxi_ccm_reg * const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

 	/* Find target frequency */
 	while (pll1_para[i].freq > hz)
 		i++;

 	hz = pll1_para[i].freq;
 	if (! hz)
 		hz = 384000000;

 	/* Calculate system clock divisors */
 	axi = DIV_ROUND_UP(hz, 432000000);	/* Max 450MHz */
 	ahb = DIV_ROUND_UP(hz/axi, 204000000);	/* Max 250MHz */
 	apb0 = 2;				/* Max 150MHz */

 	printf("CPU: %uHz, AXI/AHB/APB: %d/%d/%d\n", hz, axi, ahb, apb0);

 	/* Map divisors to register values */
 	axi = axi - 1;
 	if (ahb > 4)
 		ahb = 3;
 	else if (ahb > 2)
 		ahb = 2;
 	else if (ahb > 1)
 		ahb = 1;
 	else
 		ahb = 0;

 	apb0 = apb0 - 1;

 	/* Switch to 24MHz clock while changing PLL1 */
 	writel(AXI_DIV_1 << AXI_DIV_SHIFT |
 	       AHB_DIV_2 << AHB_DIV_SHIFT |
 	       APB0_DIV_1 << APB0_DIV_SHIFT |
 	       CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
 	       &ccm->cpu_ahb_apb0_cfg);
 	sdelay(20);

 	/* Configure sys clock divisors */
 	writel(axi << AXI_DIV_SHIFT |
 	       ahb << AHB_DIV_SHIFT |
 	       apb0 << APB0_DIV_SHIFT |
 	       CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
 	       &ccm->cpu_ahb_apb0_cfg);

 	/* Configure PLL1 at the desired frequency */
 	writel(pll1_para[i].pll1_cfg, &ccm->pll1_cfg);
 	sdelay(200);

 	/* Switch CPU to PLL1 */
 	writel(axi << AXI_DIV_SHIFT |
 	       ahb << AHB_DIV_SHIFT |
 	       apb0 << APB0_DIV_SHIFT |
 	       CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
 	       &ccm->cpu_ahb_apb0_cfg);
 	sdelay(20);
 }
 #endif

 void clock_set_pll3(unsigned int clk)
 {
 	struct sunxi_ccm_reg * const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

 	if (clk == 0) {
 		clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN);
 		return;
 	}

 	/* PLL3 rate = 3000000 * m */
 	writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
 	       CCM_PLL3_CTRL_M(clk / 3000000), &ccm->pll3_cfg);
 }

 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 m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT);
 	return 3000000 * m;
 }

 unsigned int clock_get_pll5p(void)
 {
 	struct sunxi_ccm_reg *const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 	uint32_t rval = readl(&ccm->pll5_cfg);
 	int n = ((rval & CCM_PLL5_CTRL_N_MASK) >> CCM_PLL5_CTRL_N_SHIFT);
 	int k = ((rval & CCM_PLL5_CTRL_K_MASK) >> CCM_PLL5_CTRL_K_SHIFT) + 1;
 	int p = ((rval & CCM_PLL5_CTRL_P_MASK) >> CCM_PLL5_CTRL_P_SHIFT);
 	return (24000000 * n * k) >> p;
 }

 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);
 	int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
 	return 24000000 * n * k / 2;
 }

 void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz)
 {
 	int pll = clock_get_pll5p();
 	int div = 1;

 	while ((pll / div) > hz)
 		div++;

 	writel(CCM_DE_CTRL_GATE | CCM_DE_CTRL_RST | CCM_DE_CTRL_PLL5P |
 	       CCM_DE_CTRL_M(div), clk_cfg);
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* sun4i, sun5i and sun7i 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>
	*/

	#include <common.h>
	#include <asm/io.h>
	#include <asm/arch/clock.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;

	/* Set safe defaults until PMU is configured */
	writel(AXI_DIV_1 << AXI_DIV_SHIFT \|
	AHB_DIV_2 << AHB_DIV_SHIFT \|
	APB0_DIV_1 << APB0_DIV_SHIFT \|
	CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
	&ccm->cpu_ahb_apb0_cfg);
	writel(PLL1_CFG_DEFAULT, &ccm->pll1_cfg);
	sdelay(200);
	writel(AXI_DIV_1 << AXI_DIV_SHIFT \|
	AHB_DIV_2 << AHB_DIV_SHIFT \|
	APB0_DIV_1 << APB0_DIV_SHIFT \|
	CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
	&ccm->cpu_ahb_apb0_cfg);
	#ifdef CONFIG_MACH_SUN7I
	setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_DMA);
	#endif
	writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
	#ifdef CONFIG_SUNXI_AHCI
	setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_SATA);
	setbits_le32(&ccm->pll6_cfg, 0x1 << CCM_PLL6_CTRL_SATA_EN_SHIFT);
	#endif
	}
	#endif

	void clock_init_uart(void)
	{
	struct sunxi_ccm_reg *const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

	/* uart clock source is apb1 */
	writel(APB1_CLK_SRC_OSC24M\|
	APB1_CLK_RATE_N_1\|
	APB1_CLK_RATE_M(1),
	&ccm->apb1_clk_div_cfg);

	/* open the clock for uart */
	setbits_le32(&ccm->apb1_gate,
	CLK_GATE_OPEN << (APB1_GATE_UART_SHIFT+CONFIG_CONS_INDEX - 1));
	}

	int clock_twi_onoff(int port, int state)
	{
	struct sunxi_ccm_reg *const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

	/* set the apb clock gate for twi */
	if (state)
	setbits_le32(&ccm->apb1_gate,
	CLK_GATE_OPEN << (APB1_GATE_TWI_SHIFT + port));
	else
	clrbits_le32(&ccm->apb1_gate,
	CLK_GATE_OPEN << (APB1_GATE_TWI_SHIFT + port));

	return 0;
	}

	#ifdef CONFIG_SPL_BUILD
	#define PLL1_CFG(N, K, M, P) ( 1 << CCM_PLL1_CFG_ENABLE_SHIFT \| \
	0 << CCM_PLL1_CFG_VCO_RST_SHIFT \| \
	8 << CCM_PLL1_CFG_VCO_BIAS_SHIFT \| \
	0 << CCM_PLL1_CFG_PLL4_EXCH_SHIFT \| \
	16 << CCM_PLL1_CFG_BIAS_CUR_SHIFT \| \
	(P)<< CCM_PLL1_CFG_DIVP_SHIFT \| \
	2 << CCM_PLL1_CFG_LCK_TMR_SHIFT \| \
	(N)<< CCM_PLL1_CFG_FACTOR_N_SHIFT \| \
	(K)<< CCM_PLL1_CFG_FACTOR_K_SHIFT \| \
	0 << CCM_PLL1_CFG_SIG_DELT_PAT_IN_SHIFT \| \
	0 << CCM_PLL1_CFG_SIG_DELT_PAT_EN_SHIFT \| \
	(M)<< CCM_PLL1_CFG_FACTOR_M_SHIFT)

	static struct {
	u32 pll1_cfg;
	unsigned int freq;
	} pll1_para[] = {
	/* This array must be ordered by frequency. */
	{ PLL1_CFG(31, 1, 0, 0), 1488000000},
	{ PLL1_CFG(30, 1, 0, 0), 1440000000},
	{ PLL1_CFG(29, 1, 0, 0), 1392000000},
	{ PLL1_CFG(28, 1, 0, 0), 1344000000},
	{ PLL1_CFG(27, 1, 0, 0), 1296000000},
	{ PLL1_CFG(26, 1, 0, 0), 1248000000},
	{ PLL1_CFG(25, 1, 0, 0), 1200000000},
	{ PLL1_CFG(24, 1, 0, 0), 1152000000},
	{ PLL1_CFG(23, 1, 0, 0), 1104000000},
	{ PLL1_CFG(22, 1, 0, 0), 1056000000},
	{ PLL1_CFG(21, 1, 0, 0), 1008000000},
	{ PLL1_CFG(20, 1, 0, 0), 960000000 },
	{ PLL1_CFG(19, 1, 0, 0), 912000000 },
	{ PLL1_CFG(16, 1, 0, 0), 768000000 },
	/* Final catchall entry 384MHz*/
	{ PLL1_CFG(16, 0, 0, 0), 0 },

	};

	void clock_set_pll1(unsigned int hz)
	{
	int i = 0;
	int axi, ahb, apb0;
	struct sunxi_ccm_reg * const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

	/* Find target frequency */
	while (pll1_para[i].freq > hz)
	i++;

	hz = pll1_para[i].freq;
	if (! hz)
	hz = 384000000;

	/* Calculate system clock divisors */
	axi = DIV_ROUND_UP(hz, 432000000); /* Max 450MHz */
	ahb = DIV_ROUND_UP(hz/axi, 204000000); /* Max 250MHz */
	apb0 = 2; /* Max 150MHz */

	printf("CPU: %uHz, AXI/AHB/APB: %d/%d/%d\n", hz, axi, ahb, apb0);

	/* Map divisors to register values */
	axi = axi - 1;
	if (ahb > 4)
	ahb = 3;
	else if (ahb > 2)
	ahb = 2;
	else if (ahb > 1)
	ahb = 1;
	else
	ahb = 0;

	apb0 = apb0 - 1;

	/* Switch to 24MHz clock while changing PLL1 */
	writel(AXI_DIV_1 << AXI_DIV_SHIFT \|
	AHB_DIV_2 << AHB_DIV_SHIFT \|
	APB0_DIV_1 << APB0_DIV_SHIFT \|
	CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
	&ccm->cpu_ahb_apb0_cfg);
	sdelay(20);

	/* Configure sys clock divisors */
	writel(axi << AXI_DIV_SHIFT \|
	ahb << AHB_DIV_SHIFT \|
	apb0 << APB0_DIV_SHIFT \|
	CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
	&ccm->cpu_ahb_apb0_cfg);

	/* Configure PLL1 at the desired frequency */
	writel(pll1_para[i].pll1_cfg, &ccm->pll1_cfg);
	sdelay(200);

	/* Switch CPU to PLL1 */
	writel(axi << AXI_DIV_SHIFT \|
	ahb << AHB_DIV_SHIFT \|
	apb0 << APB0_DIV_SHIFT \|
	CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
	&ccm->cpu_ahb_apb0_cfg);
	sdelay(20);
	}
	#endif

	void clock_set_pll3(unsigned int clk)
	{
	struct sunxi_ccm_reg * const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;

	if (clk == 0) {
	clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN);
	return;
	}

	/* PLL3 rate = 3000000 * m */
	writel(CCM_PLL3_CTRL_EN \| CCM_PLL3_CTRL_INTEGER_MODE \|
	CCM_PLL3_CTRL_M(clk / 3000000), &ccm->pll3_cfg);
	}

	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 m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT);
	return 3000000 * m;
	}

	unsigned int clock_get_pll5p(void)
	{
	struct sunxi_ccm_reg *const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
	uint32_t rval = readl(&ccm->pll5_cfg);
	int n = ((rval & CCM_PLL5_CTRL_N_MASK) >> CCM_PLL5_CTRL_N_SHIFT);
	int k = ((rval & CCM_PLL5_CTRL_K_MASK) >> CCM_PLL5_CTRL_K_SHIFT) + 1;
	int p = ((rval & CCM_PLL5_CTRL_P_MASK) >> CCM_PLL5_CTRL_P_SHIFT);
	return (24000000 * n * k) >> p;
	}

	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);
	int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
	return 24000000 * n * k / 2;
	}

	void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz)
	{
	int pll = clock_get_pll5p();
	int div = 1;

	while ((pll / div) > hz)
	div++;

	writel(CCM_DE_CTRL_GATE \| CCM_DE_CTRL_RST \| CCM_DE_CTRL_PLL5P \|
	CCM_DE_CTRL_M(div), clk_cfg);
	}