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|
// SPDX-License-Identifier: GPL-2.0+
/*
* 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>
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/prcm.h>
#include <asm/arch/sys_proto.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#ifdef CONFIG_SPL_BUILD
void clock_init_safe(void)
{
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
#if !defined(CONFIG_MACH_SUNXI_H3_H5) && !defined(CONFIG_MACH_SUN50I) && \
!defined(CONFIG_MACH_SUNIV)
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);
#endif
#if defined(CONFIG_MACH_SUN8I_R40) || defined(CONFIG_MACH_SUN50I)
/* Set PLL lock enable bits and switch to old lock mode */
writel(GENMASK(12, 0), &ccm->pll_lock_ctrl);
#endif
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);
if (!IS_ENABLED(CONFIG_MACH_SUNIV)) {
writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg);
if (IS_ENABLED(CONFIG_MACH_SUN6I))
writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg);
}
#if defined(CONFIG_MACH_SUN8I_R40) && defined(CONFIG_SUNXI_AHCI)
setbits_le32(&ccm->sata_pll_cfg, CCM_SATA_PLL_DEFAULT);
setbits_le32(&ccm->ahb_reset0_cfg, 0x1 << AHB_GATE_OFFSET_SATA);
setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_SATA);
setbits_le32(&ccm->sata_clk_cfg, CCM_SATA_CTRL_ENABLE);
#endif
}
#endif
void clock_init_sec(void)
{
#ifdef CONFIG_MACH_SUNXI_H3_H5
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;
setbits_le32(&ccm->ccu_sec_switch,
CCM_SEC_SWITCH_MBUS_NONSEC |
CCM_SEC_SWITCH_BUS_NONSEC |
CCM_SEC_SWITCH_PLL_NONSEC);
setbits_le32(&prcm->prcm_sec_switch,
PRCM_SEC_SWITCH_APB0_CLK_NONSEC |
PRCM_SEC_SWITCH_PLL_CFG_NONSEC |
PRCM_SEC_SWITCH_PWR_GATE_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;
#ifdef CONFIG_MACH_SUNIV
/* suniv doesn't have apb2, UART clock source is always apb1 */
/* open the clock for uart */
setbits_le32(&ccm->apb1_gate,
CLK_GATE_OPEN << (APB1_GATE_UART_SHIFT +
CONFIG_CONS_INDEX - 1));
/* deassert uart reset */
setbits_le32(&ccm->apb1_reset_cfg,
1 << (APB1_RESET_UART_SHIFT +
CONFIG_CONS_INDEX - 1));
#else
/* 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));
#endif /* !CONFIG_MACH_SUNIV */
#else /* CONFIG_CONS_INDEX >= 5 */
/* 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 = 4;
m = 2;
}
/* Switch to 24MHz clock while changing PLL1 */
if (IS_ENABLED(CONFIG_MACH_SUNIV)) {
writel(CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
&ccm->cpu_axi_cfg);
} else {
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 */
if (IS_ENABLED(CONFIG_MACH_SUNIV)) {
writel(CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
&ccm->cpu_axi_cfg);
} else {
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;
#ifdef CONFIG_SUNXI_DE2
const int m = 4; /* 6 MHz steps to allow higher frequency for DE2 */
#else
const int m = 8; /* 3 MHz steps just like sun4i, sun5i and sun7i */
#endif
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);
}
#ifdef CONFIG_SUNXI_DE2
void clock_set_pll3_factors(int m, int n)
{
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
/* PLL3 rate = 24000000 * n / m */
writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
CCM_PLL3_CTRL_N(n) | CCM_PLL3_CTRL_M(m),
&ccm->pll3_cfg);
while (!(readl(&ccm->pll3_cfg) & CCM_PLL3_CTRL_LOCK))
;
}
#endif
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;
#ifdef CONFIG_MACH_SUNXI_H3_H5
clrsetbits_le32(&ccm->pll5_tuning_cfg, CCM_PLL5_TUN_LOCK_TIME_MASK |
CCM_PLL5_TUN_INIT_FREQ_MASK,
CCM_PLL5_TUN_LOCK_TIME(2) | CCM_PLL5_TUN_INIT_FREQ(16));
#endif
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_SUNXI_DE2
void clock_set_pll10(unsigned int clk)
{
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
const int m = 2; /* 12 MHz steps */
if (clk == 0) {
clrbits_le32(&ccm->pll10_cfg, CCM_PLL10_CTRL_EN);
return;
}
/* PLL10 rate = 24000000 * n / m */
writel(CCM_PLL10_CTRL_EN | CCM_PLL10_CTRL_INTEGER_MODE |
CCM_PLL10_CTRL_N(clk / (24000000 / m)) | CCM_PLL10_CTRL_M(m),
&ccm->pll10_cfg);
while (!(readl(&ccm->pll10_cfg) & CCM_PLL10_CTRL_LOCK))
;
}
#endif
#if defined(CONFIG_MACH_SUN8I_A33) || \
defined(CONFIG_MACH_SUN8I_R40) || \
defined(CONFIG_MACH_SUN50I)
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->pll11_pattern_cfg0);
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;
if (IS_ENABLED(CONFIG_MACH_SUNIV))
return 24000000 * n * k;
else
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);
}
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