+// SPDX-License-Identifier: GPL-2.0+
/*
* Keystone2: pll initialization
*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/clock_defs.h>
+#include <linux/bitops.h>
/* DEV and ARM speed definitions as specified in DEVSPEED register */
int __weak speeds[DEVSPEED_NUMSPDS] = {
[TETRIS_PLL] = {KS2_ARMPLLCTL0, KS2_ARMPLLCTL1},
[DDR3A_PLL] = {KS2_DDR3APLLCTL0, KS2_DDR3APLLCTL1},
[DDR3B_PLL] = {KS2_DDR3BPLLCTL0, KS2_DDR3BPLLCTL1},
+ [UART_PLL] = {KS2_UARTPLLCTL0, KS2_UARTPLLCTL1},
};
+inline void pll_pa_clk_sel(void)
+{
+ setbits_le32(keystone_pll_regs[PASS_PLL].reg1, CFG_PLLCTL1_PAPLL_MASK);
+}
+
static void wait_for_completion(const struct pll_init_data *data)
{
int i;
{
int pllod = data->pll_od - 1;
+ /* Enable Glitch free bypass for ARM PLL */
+ if (cpu_is_k2hk() && data->pll == TETRIS_PLL)
+ clrbits_le32(KS2_MISC_CTRL, MISC_CTL1_ARM_PLL_EN);
+
/* Enable Bypass mode */
setbits_le32(keystone_pll_regs[data->pll].reg1, CFG_PLLCTL1_ENSAT_MASK);
setbits_le32(keystone_pll_regs[data->pll].reg0,
CFG_PLLCTL0_BYPASS_MASK);
- /* Enable Glitch free bypass for ARM PLL */
- if (cpu_is_k2hk() && data->pll == TETRIS_PLL)
- clrbits_le32(KS2_MISC_CTRL, MISC_CTL1_ARM_PLL_EN);
-
configure_mult_div(data);
/* Program Output Divider */
sdelay(21000);
/* Select the Output of PASS PLL as input to PASS */
- if (data->pll == PASS_PLL)
- setbits_le32(keystone_pll_regs[data->pll].reg1,
- CFG_PLLCTL1_PAPLL_MASK);
-
- /* Select the Output of ARM PLL as input to ARM */
- if (data->pll == TETRIS_PLL)
- setbits_le32(KS2_MISC_CTRL, MISC_CTL1_ARM_PLL_EN);
+ if (data->pll == PASS_PLL && cpu_is_k2hk())
+ pll_pa_clk_sel();
clrbits_le32(keystone_pll_regs[data->pll].reg1, CFG_PLLCTL1_RST_MASK);
/* Wait for 500 * REFCLK cucles * (PLLD + 1) */
/* Switch to PLL mode */
clrbits_le32(keystone_pll_regs[data->pll].reg0,
CFG_PLLCTL0_BYPASS_MASK);
+
+ /* Select the Output of ARM PLL as input to ARM */
+ if (cpu_is_k2hk() && data->pll == TETRIS_PLL)
+ setbits_le32(KS2_MISC_CTRL, MISC_CTL1_ARM_PLL_EN);
}
void init_pll(const struct pll_init_data *data)
sdelay(210000);
}
-void init_plls(int num_pll, struct pll_init_data *config)
+void init_plls(void)
{
- int i;
+ struct pll_init_data *data;
+ int pll;
- for (i = 0; i < num_pll; i++)
- init_pll(&config[i]);
+ for (pll = MAIN_PLL; pll < MAX_PLL_COUNT; pll++) {
+ data = get_pll_init_data(pll);
+ if (data)
+ init_pll(data);
+ }
}
-static int get_max_speed(u32 val, u32 speed_supported)
+static int get_max_speed(u32 val, u32 speed_supported, int *spds)
{
int speed;
/* Left most setbit gives the speed */
for (speed = DEVSPEED_NUMSPDS; speed >= 0; speed--) {
if ((val & BIT(speed)) & speed_supported)
- return speeds[speed];
+ return spds[speed];
}
- /* If no bit is set, use SPD800 */
- return SPD800;
+ /* If no bit is set, return minimum speed */
+ if (cpu_is_k2g())
+ return SPD200;
+ else
+ return SPD800;
}
static inline u32 read_efuse_bootrom(void)
return __raw_readl(KS2_EFUSE_BOOTROM);
}
-int get_max_arm_speed(void)
+int get_max_arm_speed(int *spds)
{
u32 armspeed = read_efuse_bootrom();
armspeed = (armspeed & DEVSPEED_ARMSPEED_MASK) >>
DEVSPEED_ARMSPEED_SHIFT;
- return get_max_speed(armspeed, ARM_SUPPORTED_SPEEDS);
+ return get_max_speed(armspeed, ARM_SUPPORTED_SPEEDS, spds);
}
-int get_max_dev_speed(void)
+int get_max_dev_speed(int *spds)
{
u32 devspeed = read_efuse_bootrom();
devspeed = (devspeed & DEVSPEED_DEVSPEED_MASK) >>
DEVSPEED_DEVSPEED_SHIFT;
- return get_max_speed(devspeed, DEV_SUPPORTED_SPEEDS);
+ return get_max_speed(devspeed, DEV_SUPPORTED_SPEEDS, spds);
+}
+
+/**
+ * pll_freq_get - get pll frequency
+ * @pll: pll identifier
+ */
+static unsigned long pll_freq_get(int pll)
+{
+ unsigned long mult = 1, prediv = 1, output_div = 2;
+ unsigned long ret;
+ u32 tmp, reg;
+
+ if (pll == MAIN_PLL) {
+ ret = get_external_clk(sys_clk);
+ if (pllctl_reg_read(pll, ctl) & PLLCTL_PLLEN_MASK) {
+ /* PLL mode */
+ tmp = __raw_readl(KS2_MAINPLLCTL0);
+ prediv = (tmp & CFG_PLLCTL0_PLLD_MASK) + 1;
+ mult = ((tmp & CFG_PLLCTL0_PLLM_HI_MASK) >>
+ CFG_PLLCTL0_PLLM_SHIFT |
+ (pllctl_reg_read(pll, mult) &
+ PLLM_MULT_LO_MASK)) + 1;
+ output_div = ((pllctl_reg_read(pll, secctl) &
+ SECCTL_OP_DIV_MASK) >>
+ SECCTL_OP_DIV_SHIFT) + 1;
+
+ ret = ret / prediv / output_div * mult;
+ }
+ } else {
+ switch (pll) {
+ case PASS_PLL:
+ ret = get_external_clk(pa_clk);
+ reg = KS2_PASSPLLCTL0;
+ break;
+ case TETRIS_PLL:
+ ret = get_external_clk(tetris_clk);
+ reg = KS2_ARMPLLCTL0;
+ break;
+ case DDR3A_PLL:
+ ret = get_external_clk(ddr3a_clk);
+ reg = KS2_DDR3APLLCTL0;
+ break;
+ case DDR3B_PLL:
+ ret = get_external_clk(ddr3b_clk);
+ reg = KS2_DDR3BPLLCTL0;
+ break;
+ case UART_PLL:
+ ret = get_external_clk(uart_clk);
+ reg = KS2_UARTPLLCTL0;
+ break;
+ default:
+ return 0;
+ }
+
+ tmp = __raw_readl(reg);
+
+ if (!(tmp & CFG_PLLCTL0_BYPASS_MASK)) {
+ /* Bypass disabled */
+ prediv = (tmp & CFG_PLLCTL0_PLLD_MASK) + 1;
+ mult = ((tmp & CFG_PLLCTL0_PLLM_MASK) >>
+ CFG_PLLCTL0_PLLM_SHIFT) + 1;
+ output_div = ((tmp & CFG_PLLCTL0_CLKOD_MASK) >>
+ CFG_PLLCTL0_CLKOD_SHIFT) + 1;
+ ret = ((ret / prediv) * mult) / output_div;
+ }
+ }
+
+ return ret;
+}
+
+unsigned long ks_clk_get_rate(unsigned int clk)
+{
+ unsigned long freq = 0;
+
+ switch (clk) {
+ case core_pll_clk:
+ freq = pll_freq_get(CORE_PLL);
+ break;
+ case pass_pll_clk:
+ freq = pll_freq_get(PASS_PLL);
+ break;
+ case tetris_pll_clk:
+ if (!cpu_is_k2e())
+ freq = pll_freq_get(TETRIS_PLL);
+ break;
+ case ddr3a_pll_clk:
+ freq = pll_freq_get(DDR3A_PLL);
+ break;
+ case ddr3b_pll_clk:
+ if (cpu_is_k2hk())
+ freq = pll_freq_get(DDR3B_PLL);
+ break;
+ case uart_pll_clk:
+ if (cpu_is_k2g())
+ freq = pll_freq_get(UART_PLL);
+ break;
+ case sys_clk0_1_clk:
+ case sys_clk0_clk:
+ freq = pll_freq_get(CORE_PLL) / pll0div_read(1);
+ break;
+ case sys_clk1_clk:
+ return pll_freq_get(CORE_PLL) / pll0div_read(2);
+ break;
+ case sys_clk2_clk:
+ freq = pll_freq_get(CORE_PLL) / pll0div_read(3);
+ break;
+ case sys_clk3_clk:
+ freq = pll_freq_get(CORE_PLL) / pll0div_read(4);
+ break;
+ case sys_clk0_2_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 2;
+ break;
+ case sys_clk0_3_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 3;
+ break;
+ case sys_clk0_4_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 4;
+ break;
+ case sys_clk0_6_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 6;
+ break;
+ case sys_clk0_8_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 8;
+ break;
+ case sys_clk0_12_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 12;
+ break;
+ case sys_clk0_24_clk:
+ freq = ks_clk_get_rate(sys_clk0_clk) / 24;
+ break;
+ case sys_clk1_3_clk:
+ freq = ks_clk_get_rate(sys_clk1_clk) / 3;
+ break;
+ case sys_clk1_4_clk:
+ freq = ks_clk_get_rate(sys_clk1_clk) / 4;
+ break;
+ case sys_clk1_6_clk:
+ freq = ks_clk_get_rate(sys_clk1_clk) / 6;
+ break;
+ case sys_clk1_12_clk:
+ freq = ks_clk_get_rate(sys_clk1_clk) / 12;
+ break;
+ default:
+ break;
+ }
+
+ return freq;
}
projects / oweals / u-boot.git / blobdiff