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/*
* 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>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/gpio.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_SUN7I
setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_DMA);
#endif
writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
}
#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;
if (port > 2)
return -1;
/* 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(16, 0, 0, 0), 384000000 },
{ PLL1_CFG(16, 1, 0, 0), 768000000 },
{ PLL1_CFG(20, 1, 0, 0), 960000000 },
{ PLL1_CFG(21, 1, 0, 0), 1008000000},
{ PLL1_CFG(22, 1, 0, 0), 1056000000},
{ PLL1_CFG(23, 1, 0, 0), 1104000000},
{ PLL1_CFG(24, 1, 0, 0), 1152000000},
{ PLL1_CFG(25, 1, 0, 0), 1200000000},
{ PLL1_CFG(26, 1, 0, 0), 1248000000},
{ PLL1_CFG(27, 1, 0, 0), 1296000000},
{ PLL1_CFG(28, 1, 0, 0), 1344000000},
{ PLL1_CFG(29, 1, 0, 0), 1392000000},
{ PLL1_CFG(30, 1, 0, 0), 1440000000},
{ PLL1_CFG(31, 1, 0, 0), 1488000000},
/* Final catchall entry */
{ PLL1_CFG(31, 1, 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;
/* 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
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;
}
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