diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/st/clk/stm32mp1_clk.c | 2373 |
1 files changed, 2373 insertions, 0 deletions
diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c new file mode 100644 index 0000000..c9c3c5f --- /dev/null +++ b/drivers/st/clk/stm32mp1_clk.c @@ -0,0 +1,2373 @@ +/* + * Copyright (C) 2018-2022, STMicroelectronics - All Rights Reserved + * + * SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause + */ + +#include <assert.h> +#include <errno.h> +#include <stdint.h> +#include <stdio.h> + +#include <arch.h> +#include <arch_helpers.h> +#include <common/debug.h> +#include <common/fdt_wrappers.h> +#include <drivers/clk.h> +#include <drivers/delay_timer.h> +#include <drivers/st/stm32mp_clkfunc.h> +#include <drivers/st/stm32mp1_clk.h> +#include <drivers/st/stm32mp1_rcc.h> +#include <dt-bindings/clock/stm32mp1-clksrc.h> +#include <lib/mmio.h> +#include <lib/spinlock.h> +#include <lib/utils_def.h> +#include <libfdt.h> +#include <plat/common/platform.h> + +#include <platform_def.h> + +#define MAX_HSI_HZ 64000000 +#define USB_PHY_48_MHZ 48000000 + +#define TIMEOUT_US_200MS U(200000) +#define TIMEOUT_US_1S U(1000000) + +#define PLLRDY_TIMEOUT TIMEOUT_US_200MS +#define CLKSRC_TIMEOUT TIMEOUT_US_200MS +#define CLKDIV_TIMEOUT TIMEOUT_US_200MS +#define HSIDIV_TIMEOUT TIMEOUT_US_200MS +#define OSCRDY_TIMEOUT TIMEOUT_US_1S + +const char *stm32mp_osc_node_label[NB_OSC] = { + [_LSI] = "clk-lsi", + [_LSE] = "clk-lse", + [_HSI] = "clk-hsi", + [_HSE] = "clk-hse", + [_CSI] = "clk-csi", + [_I2S_CKIN] = "i2s_ckin", +}; + +enum stm32mp1_parent_id { +/* Oscillators are defined in enum stm32mp_osc_id */ + +/* Other parent source */ + _HSI_KER = NB_OSC, + _HSE_KER, + _HSE_KER_DIV2, + _HSE_RTC, + _CSI_KER, + _PLL1_P, + _PLL1_Q, + _PLL1_R, + _PLL2_P, + _PLL2_Q, + _PLL2_R, + _PLL3_P, + _PLL3_Q, + _PLL3_R, + _PLL4_P, + _PLL4_Q, + _PLL4_R, + _ACLK, + _PCLK1, + _PCLK2, + _PCLK3, + _PCLK4, + _PCLK5, + _HCLK6, + _HCLK2, + _CK_PER, + _CK_MPU, + _CK_MCU, + _USB_PHY_48, + _PARENT_NB, + _UNKNOWN_ID = 0xff, +}; + +/* Lists only the parent clock we are interested in */ +enum stm32mp1_parent_sel { + _I2C12_SEL, + _I2C35_SEL, + _STGEN_SEL, + _I2C46_SEL, + _SPI6_SEL, + _UART1_SEL, + _RNG1_SEL, + _UART6_SEL, + _UART24_SEL, + _UART35_SEL, + _UART78_SEL, + _SDMMC12_SEL, + _SDMMC3_SEL, + _QSPI_SEL, + _FMC_SEL, + _AXIS_SEL, + _MCUS_SEL, + _USBPHY_SEL, + _USBO_SEL, + _MPU_SEL, + _CKPER_SEL, + _RTC_SEL, + _PARENT_SEL_NB, + _UNKNOWN_SEL = 0xff, +}; + +/* State the parent clock ID straight related to a clock */ +static const uint8_t parent_id_clock_id[_PARENT_NB] = { + [_HSE] = CK_HSE, + [_HSI] = CK_HSI, + [_CSI] = CK_CSI, + [_LSE] = CK_LSE, + [_LSI] = CK_LSI, + [_I2S_CKIN] = _UNKNOWN_ID, + [_USB_PHY_48] = _UNKNOWN_ID, + [_HSI_KER] = CK_HSI, + [_HSE_KER] = CK_HSE, + [_HSE_KER_DIV2] = CK_HSE_DIV2, + [_HSE_RTC] = _UNKNOWN_ID, + [_CSI_KER] = CK_CSI, + [_PLL1_P] = PLL1_P, + [_PLL1_Q] = PLL1_Q, + [_PLL1_R] = PLL1_R, + [_PLL2_P] = PLL2_P, + [_PLL2_Q] = PLL2_Q, + [_PLL2_R] = PLL2_R, + [_PLL3_P] = PLL3_P, + [_PLL3_Q] = PLL3_Q, + [_PLL3_R] = PLL3_R, + [_PLL4_P] = PLL4_P, + [_PLL4_Q] = PLL4_Q, + [_PLL4_R] = PLL4_R, + [_ACLK] = CK_AXI, + [_PCLK1] = CK_AXI, + [_PCLK2] = CK_AXI, + [_PCLK3] = CK_AXI, + [_PCLK4] = CK_AXI, + [_PCLK5] = CK_AXI, + [_CK_PER] = CK_PER, + [_CK_MPU] = CK_MPU, + [_CK_MCU] = CK_MCU, +}; + +static unsigned int clock_id2parent_id(unsigned long id) +{ + unsigned int n; + + for (n = 0U; n < ARRAY_SIZE(parent_id_clock_id); n++) { + if (parent_id_clock_id[n] == id) { + return n; + } + } + + return _UNKNOWN_ID; +} + +enum stm32mp1_pll_id { + _PLL1, + _PLL2, + _PLL3, + _PLL4, + _PLL_NB +}; + +enum stm32mp1_div_id { + _DIV_P, + _DIV_Q, + _DIV_R, + _DIV_NB, +}; + +enum stm32mp1_clksrc_id { + CLKSRC_MPU, + CLKSRC_AXI, + CLKSRC_MCU, + CLKSRC_PLL12, + CLKSRC_PLL3, + CLKSRC_PLL4, + CLKSRC_RTC, + CLKSRC_MCO1, + CLKSRC_MCO2, + CLKSRC_NB +}; + +enum stm32mp1_clkdiv_id { + CLKDIV_MPU, + CLKDIV_AXI, + CLKDIV_MCU, + CLKDIV_APB1, + CLKDIV_APB2, + CLKDIV_APB3, + CLKDIV_APB4, + CLKDIV_APB5, + CLKDIV_RTC, + CLKDIV_MCO1, + CLKDIV_MCO2, + CLKDIV_NB +}; + +enum stm32mp1_pllcfg { + PLLCFG_M, + PLLCFG_N, + PLLCFG_P, + PLLCFG_Q, + PLLCFG_R, + PLLCFG_O, + PLLCFG_NB +}; + +enum stm32mp1_pllcsg { + PLLCSG_MOD_PER, + PLLCSG_INC_STEP, + PLLCSG_SSCG_MODE, + PLLCSG_NB +}; + +enum stm32mp1_plltype { + PLL_800, + PLL_1600, + PLL_TYPE_NB +}; + +struct stm32mp1_pll { + uint8_t refclk_min; + uint8_t refclk_max; +}; + +struct stm32mp1_clk_gate { + uint16_t offset; + uint8_t bit; + uint8_t index; + uint8_t set_clr; + uint8_t secure; + uint8_t sel; /* Relates to enum stm32mp1_parent_sel */ + uint8_t fixed; /* Relates to enum stm32mp1_parent_id */ +}; + +struct stm32mp1_clk_sel { + uint16_t offset; + uint8_t src; + uint8_t msk; + uint8_t nb_parent; + const uint8_t *parent; +}; + +#define REFCLK_SIZE 4 +struct stm32mp1_clk_pll { + enum stm32mp1_plltype plltype; + uint16_t rckxselr; + uint16_t pllxcfgr1; + uint16_t pllxcfgr2; + uint16_t pllxfracr; + uint16_t pllxcr; + uint16_t pllxcsgr; + enum stm32mp_osc_id refclk[REFCLK_SIZE]; +}; + +/* Clocks with selectable source and non set/clr register access */ +#define _CLK_SELEC(sec, off, b, idx, s) \ + { \ + .offset = (off), \ + .bit = (b), \ + .index = (idx), \ + .set_clr = 0, \ + .secure = (sec), \ + .sel = (s), \ + .fixed = _UNKNOWN_ID, \ + } + +/* Clocks with fixed source and non set/clr register access */ +#define _CLK_FIXED(sec, off, b, idx, f) \ + { \ + .offset = (off), \ + .bit = (b), \ + .index = (idx), \ + .set_clr = 0, \ + .secure = (sec), \ + .sel = _UNKNOWN_SEL, \ + .fixed = (f), \ + } + +/* Clocks with selectable source and set/clr register access */ +#define _CLK_SC_SELEC(sec, off, b, idx, s) \ + { \ + .offset = (off), \ + .bit = (b), \ + .index = (idx), \ + .set_clr = 1, \ + .secure = (sec), \ + .sel = (s), \ + .fixed = _UNKNOWN_ID, \ + } + +/* Clocks with fixed source and set/clr register access */ +#define _CLK_SC_FIXED(sec, off, b, idx, f) \ + { \ + .offset = (off), \ + .bit = (b), \ + .index = (idx), \ + .set_clr = 1, \ + .secure = (sec), \ + .sel = _UNKNOWN_SEL, \ + .fixed = (f), \ + } + +#define _CLK_PARENT_SEL(_label, _rcc_selr, _parents) \ + [_ ## _label ## _SEL] = { \ + .offset = _rcc_selr, \ + .src = _rcc_selr ## _ ## _label ## SRC_SHIFT, \ + .msk = (_rcc_selr ## _ ## _label ## SRC_MASK) >> \ + (_rcc_selr ## _ ## _label ## SRC_SHIFT), \ + .parent = (_parents), \ + .nb_parent = ARRAY_SIZE(_parents) \ + } + +#define _CLK_PLL(idx, type, off1, off2, off3, \ + off4, off5, off6, \ + p1, p2, p3, p4) \ + [(idx)] = { \ + .plltype = (type), \ + .rckxselr = (off1), \ + .pllxcfgr1 = (off2), \ + .pllxcfgr2 = (off3), \ + .pllxfracr = (off4), \ + .pllxcr = (off5), \ + .pllxcsgr = (off6), \ + .refclk[0] = (p1), \ + .refclk[1] = (p2), \ + .refclk[2] = (p3), \ + .refclk[3] = (p4), \ + } + +#define NB_GATES ARRAY_SIZE(stm32mp1_clk_gate) + +#define SEC 1 +#define N_S 0 + +static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = { + _CLK_FIXED(SEC, RCC_DDRITFCR, 0, DDRC1, _ACLK), + _CLK_FIXED(SEC, RCC_DDRITFCR, 1, DDRC1LP, _ACLK), + _CLK_FIXED(SEC, RCC_DDRITFCR, 2, DDRC2, _ACLK), + _CLK_FIXED(SEC, RCC_DDRITFCR, 3, DDRC2LP, _ACLK), + _CLK_FIXED(SEC, RCC_DDRITFCR, 4, DDRPHYC, _PLL2_R), + _CLK_FIXED(SEC, RCC_DDRITFCR, 5, DDRPHYCLP, _PLL2_R), + _CLK_FIXED(SEC, RCC_DDRITFCR, 6, DDRCAPB, _PCLK4), + _CLK_FIXED(SEC, RCC_DDRITFCR, 7, DDRCAPBLP, _PCLK4), + _CLK_FIXED(SEC, RCC_DDRITFCR, 8, AXIDCG, _ACLK), + _CLK_FIXED(SEC, RCC_DDRITFCR, 9, DDRPHYCAPB, _PCLK4), + _CLK_FIXED(SEC, RCC_DDRITFCR, 10, DDRPHYCAPBLP, _PCLK4), + +#if defined(IMAGE_BL32) + _CLK_SC_FIXED(N_S, RCC_MP_APB1ENSETR, 6, TIM12_K, _PCLK1), +#endif + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 14, USART2_K, _UART24_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 15, USART3_K, _UART35_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 16, UART4_K, _UART24_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 17, UART5_K, _UART35_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 18, UART7_K, _UART78_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 19, UART8_K, _UART78_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 21, I2C1_K, _I2C12_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 22, I2C2_K, _I2C12_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 23, I2C3_K, _I2C35_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB1ENSETR, 24, I2C5_K, _I2C35_SEL), + +#if defined(IMAGE_BL32) + _CLK_SC_FIXED(N_S, RCC_MP_APB2ENSETR, 2, TIM15_K, _PCLK2), +#endif + _CLK_SC_SELEC(N_S, RCC_MP_APB2ENSETR, 13, USART6_K, _UART6_SEL), + + _CLK_SC_FIXED(N_S, RCC_MP_APB3ENSETR, 11, SYSCFG, _UNKNOWN_ID), + + _CLK_SC_SELEC(N_S, RCC_MP_APB4ENSETR, 8, DDRPERFM, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB4ENSETR, 15, IWDG2, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_APB4ENSETR, 16, USBPHY_K, _USBPHY_SEL), + + _CLK_SC_SELEC(SEC, RCC_MP_APB5ENSETR, 0, SPI6_K, _SPI6_SEL), + _CLK_SC_SELEC(SEC, RCC_MP_APB5ENSETR, 2, I2C4_K, _I2C46_SEL), + _CLK_SC_SELEC(SEC, RCC_MP_APB5ENSETR, 3, I2C6_K, _I2C46_SEL), + _CLK_SC_SELEC(SEC, RCC_MP_APB5ENSETR, 4, USART1_K, _UART1_SEL), + _CLK_SC_FIXED(SEC, RCC_MP_APB5ENSETR, 8, RTCAPB, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_APB5ENSETR, 11, TZC1, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_APB5ENSETR, 12, TZC2, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_APB5ENSETR, 13, TZPC, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_APB5ENSETR, 15, IWDG1, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_APB5ENSETR, 16, BSEC, _PCLK5), + _CLK_SC_SELEC(SEC, RCC_MP_APB5ENSETR, 20, STGEN_K, _STGEN_SEL), + +#if defined(IMAGE_BL32) + _CLK_SC_SELEC(N_S, RCC_MP_AHB2ENSETR, 8, USBO_K, _USBO_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB2ENSETR, 16, SDMMC3_K, _SDMMC3_SEL), +#endif + + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 0, GPIOA, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 1, GPIOB, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 2, GPIOC, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 3, GPIOD, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 4, GPIOE, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 5, GPIOF, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 6, GPIOG, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 7, GPIOH, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 8, GPIOI, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 9, GPIOJ, _UNKNOWN_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB4ENSETR, 10, GPIOK, _UNKNOWN_SEL), + + _CLK_SC_FIXED(SEC, RCC_MP_AHB5ENSETR, 0, GPIOZ, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_AHB5ENSETR, 4, CRYP1, _PCLK5), + _CLK_SC_FIXED(SEC, RCC_MP_AHB5ENSETR, 5, HASH1, _PCLK5), + _CLK_SC_SELEC(SEC, RCC_MP_AHB5ENSETR, 6, RNG1_K, _RNG1_SEL), + _CLK_SC_FIXED(SEC, RCC_MP_AHB5ENSETR, 8, BKPSRAM, _PCLK5), + +#if defined(IMAGE_BL2) + _CLK_SC_SELEC(N_S, RCC_MP_AHB6ENSETR, 12, FMC_K, _FMC_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB6ENSETR, 14, QSPI_K, _QSPI_SEL), +#endif + _CLK_SC_SELEC(N_S, RCC_MP_AHB6ENSETR, 16, SDMMC1_K, _SDMMC12_SEL), + _CLK_SC_SELEC(N_S, RCC_MP_AHB6ENSETR, 17, SDMMC2_K, _SDMMC12_SEL), +#if defined(IMAGE_BL32) + _CLK_SC_SELEC(N_S, RCC_MP_AHB6ENSETR, 24, USBH, _UNKNOWN_SEL), +#endif + + _CLK_SELEC(SEC, RCC_BDCR, 20, RTC, _RTC_SEL), + _CLK_SELEC(N_S, RCC_DBGCFGR, 8, CK_DBG, _UNKNOWN_SEL), +}; + +static const uint8_t i2c12_parents[] = { + _PCLK1, _PLL4_R, _HSI_KER, _CSI_KER +}; + +static const uint8_t i2c35_parents[] = { + _PCLK1, _PLL4_R, _HSI_KER, _CSI_KER +}; + +static const uint8_t stgen_parents[] = { + _HSI_KER, _HSE_KER +}; + +static const uint8_t i2c46_parents[] = { + _PCLK5, _PLL3_Q, _HSI_KER, _CSI_KER +}; + +static const uint8_t spi6_parents[] = { + _PCLK5, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER, _PLL3_Q +}; + +static const uint8_t usart1_parents[] = { + _PCLK5, _PLL3_Q, _HSI_KER, _CSI_KER, _PLL4_Q, _HSE_KER +}; + +static const uint8_t rng1_parents[] = { + _CSI, _PLL4_R, _LSE, _LSI +}; + +static const uint8_t uart6_parents[] = { + _PCLK2, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER +}; + +static const uint8_t uart234578_parents[] = { + _PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER +}; + +static const uint8_t sdmmc12_parents[] = { + _HCLK6, _PLL3_R, _PLL4_P, _HSI_KER +}; + +static const uint8_t sdmmc3_parents[] = { + _HCLK2, _PLL3_R, _PLL4_P, _HSI_KER +}; + +static const uint8_t qspi_parents[] = { + _ACLK, _PLL3_R, _PLL4_P, _CK_PER +}; + +static const uint8_t fmc_parents[] = { + _ACLK, _PLL3_R, _PLL4_P, _CK_PER +}; + +static const uint8_t axiss_parents[] = { + _HSI, _HSE, _PLL2_P +}; + +static const uint8_t mcuss_parents[] = { + _HSI, _HSE, _CSI, _PLL3_P +}; + +static const uint8_t usbphy_parents[] = { + _HSE_KER, _PLL4_R, _HSE_KER_DIV2 +}; + +static const uint8_t usbo_parents[] = { + _PLL4_R, _USB_PHY_48 +}; + +static const uint8_t mpu_parents[] = { + _HSI, _HSE, _PLL1_P, _PLL1_P /* specific div */ +}; + +static const uint8_t per_parents[] = { + _HSI, _HSE, _CSI, +}; + +static const uint8_t rtc_parents[] = { + _UNKNOWN_ID, _LSE, _LSI, _HSE_RTC +}; + +static const struct stm32mp1_clk_sel stm32mp1_clk_sel[_PARENT_SEL_NB] = { + _CLK_PARENT_SEL(I2C12, RCC_I2C12CKSELR, i2c12_parents), + _CLK_PARENT_SEL(I2C35, RCC_I2C35CKSELR, i2c35_parents), + _CLK_PARENT_SEL(STGEN, RCC_STGENCKSELR, stgen_parents), + _CLK_PARENT_SEL(I2C46, RCC_I2C46CKSELR, i2c46_parents), + _CLK_PARENT_SEL(SPI6, RCC_SPI6CKSELR, spi6_parents), + _CLK_PARENT_SEL(UART1, RCC_UART1CKSELR, usart1_parents), + _CLK_PARENT_SEL(RNG1, RCC_RNG1CKSELR, rng1_parents), + _CLK_PARENT_SEL(MPU, RCC_MPCKSELR, mpu_parents), + _CLK_PARENT_SEL(CKPER, RCC_CPERCKSELR, per_parents), + _CLK_PARENT_SEL(RTC, RCC_BDCR, rtc_parents), + _CLK_PARENT_SEL(UART6, RCC_UART6CKSELR, uart6_parents), + _CLK_PARENT_SEL(UART24, RCC_UART24CKSELR, uart234578_parents), + _CLK_PARENT_SEL(UART35, RCC_UART35CKSELR, uart234578_parents), + _CLK_PARENT_SEL(UART78, RCC_UART78CKSELR, uart234578_parents), + _CLK_PARENT_SEL(SDMMC12, RCC_SDMMC12CKSELR, sdmmc12_parents), + _CLK_PARENT_SEL(SDMMC3, RCC_SDMMC3CKSELR, sdmmc3_parents), + _CLK_PARENT_SEL(QSPI, RCC_QSPICKSELR, qspi_parents), + _CLK_PARENT_SEL(FMC, RCC_FMCCKSELR, fmc_parents), + _CLK_PARENT_SEL(AXIS, RCC_ASSCKSELR, axiss_parents), + _CLK_PARENT_SEL(MCUS, RCC_MSSCKSELR, mcuss_parents), + _CLK_PARENT_SEL(USBPHY, RCC_USBCKSELR, usbphy_parents), + _CLK_PARENT_SEL(USBO, RCC_USBCKSELR, usbo_parents), +}; + +/* Define characteristic of PLL according type */ +#define DIVN_MIN 24 +static const struct stm32mp1_pll stm32mp1_pll[PLL_TYPE_NB] = { + [PLL_800] = { + .refclk_min = 4, + .refclk_max = 16, + }, + [PLL_1600] = { + .refclk_min = 8, + .refclk_max = 16, + }, +}; + +/* PLLNCFGR2 register divider by output */ +static const uint8_t pllncfgr2[_DIV_NB] = { + [_DIV_P] = RCC_PLLNCFGR2_DIVP_SHIFT, + [_DIV_Q] = RCC_PLLNCFGR2_DIVQ_SHIFT, + [_DIV_R] = RCC_PLLNCFGR2_DIVR_SHIFT, +}; + +static const struct stm32mp1_clk_pll stm32mp1_clk_pll[_PLL_NB] = { + _CLK_PLL(_PLL1, PLL_1600, + RCC_RCK12SELR, RCC_PLL1CFGR1, RCC_PLL1CFGR2, + RCC_PLL1FRACR, RCC_PLL1CR, RCC_PLL1CSGR, + _HSI, _HSE, _UNKNOWN_OSC_ID, _UNKNOWN_OSC_ID), + _CLK_PLL(_PLL2, PLL_1600, + RCC_RCK12SELR, RCC_PLL2CFGR1, RCC_PLL2CFGR2, + RCC_PLL2FRACR, RCC_PLL2CR, RCC_PLL2CSGR, + _HSI, _HSE, _UNKNOWN_OSC_ID, _UNKNOWN_OSC_ID), + _CLK_PLL(_PLL3, PLL_800, + RCC_RCK3SELR, RCC_PLL3CFGR1, RCC_PLL3CFGR2, + RCC_PLL3FRACR, RCC_PLL3CR, RCC_PLL3CSGR, + _HSI, _HSE, _CSI, _UNKNOWN_OSC_ID), + _CLK_PLL(_PLL4, PLL_800, + RCC_RCK4SELR, RCC_PLL4CFGR1, RCC_PLL4CFGR2, + RCC_PLL4FRACR, RCC_PLL4CR, RCC_PLL4CSGR, + _HSI, _HSE, _CSI, _I2S_CKIN), +}; + +/* Prescaler table lookups for clock computation */ +/* div = /1 /2 /4 /8 / 16 /64 /128 /512 */ +static const uint8_t stm32mp1_mcu_div[16] = { + 0, 1, 2, 3, 4, 6, 7, 8, 9, 9, 9, 9, 9, 9, 9, 9 +}; + +/* div = /1 /2 /4 /8 /16 : same divider for PMU and APBX */ +#define stm32mp1_mpu_div stm32mp1_mpu_apbx_div +#define stm32mp1_apbx_div stm32mp1_mpu_apbx_div +static const uint8_t stm32mp1_mpu_apbx_div[8] = { + 0, 1, 2, 3, 4, 4, 4, 4 +}; + +/* div = /1 /2 /3 /4 */ +static const uint8_t stm32mp1_axi_div[8] = { + 1, 2, 3, 4, 4, 4, 4, 4 +}; + +static const char * const stm32mp1_clk_parent_name[_PARENT_NB] __unused = { + [_HSI] = "HSI", + [_HSE] = "HSE", + [_CSI] = "CSI", + [_LSI] = "LSI", + [_LSE] = "LSE", + [_I2S_CKIN] = "I2S_CKIN", + [_HSI_KER] = "HSI_KER", + [_HSE_KER] = "HSE_KER", + [_HSE_KER_DIV2] = "HSE_KER_DIV2", + [_HSE_RTC] = "HSE_RTC", + [_CSI_KER] = "CSI_KER", + [_PLL1_P] = "PLL1_P", + [_PLL1_Q] = "PLL1_Q", + [_PLL1_R] = "PLL1_R", + [_PLL2_P] = "PLL2_P", + [_PLL2_Q] = "PLL2_Q", + [_PLL2_R] = "PLL2_R", + [_PLL3_P] = "PLL3_P", + [_PLL3_Q] = "PLL3_Q", + [_PLL3_R] = "PLL3_R", + [_PLL4_P] = "PLL4_P", + [_PLL4_Q] = "PLL4_Q", + [_PLL4_R] = "PLL4_R", + [_ACLK] = "ACLK", + [_PCLK1] = "PCLK1", + [_PCLK2] = "PCLK2", + [_PCLK3] = "PCLK3", + [_PCLK4] = "PCLK4", + [_PCLK5] = "PCLK5", + [_HCLK6] = "KCLK6", + [_HCLK2] = "HCLK2", + [_CK_PER] = "CK_PER", + [_CK_MPU] = "CK_MPU", + [_CK_MCU] = "CK_MCU", + [_USB_PHY_48] = "USB_PHY_48", +}; + +/* RCC clock device driver private */ +static unsigned long stm32mp1_osc[NB_OSC]; +static struct spinlock reg_lock; +static unsigned int gate_refcounts[NB_GATES]; +static struct spinlock refcount_lock; + +static const struct stm32mp1_clk_gate *gate_ref(unsigned int idx) +{ + return &stm32mp1_clk_gate[idx]; +} + +#if defined(IMAGE_BL32) +static bool gate_is_non_secure(const struct stm32mp1_clk_gate *gate) +{ + return gate->secure == N_S; +} +#endif + +static const struct stm32mp1_clk_sel *clk_sel_ref(unsigned int idx) +{ + return &stm32mp1_clk_sel[idx]; +} + +static const struct stm32mp1_clk_pll *pll_ref(unsigned int idx) +{ + return &stm32mp1_clk_pll[idx]; +} + +static void stm32mp1_clk_lock(struct spinlock *lock) +{ + if (stm32mp_lock_available()) { + /* Assume interrupts are masked */ + spin_lock(lock); + } +} + +static void stm32mp1_clk_unlock(struct spinlock *lock) +{ + if (stm32mp_lock_available()) { + spin_unlock(lock); + } +} + +bool stm32mp1_rcc_is_secure(void) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + uint32_t mask = RCC_TZCR_TZEN; + + return (mmio_read_32(rcc_base + RCC_TZCR) & mask) == mask; +} + +bool stm32mp1_rcc_is_mckprot(void) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + uint32_t mask = RCC_TZCR_TZEN | RCC_TZCR_MCKPROT; + + return (mmio_read_32(rcc_base + RCC_TZCR) & mask) == mask; +} + +void stm32mp1_clk_rcc_regs_lock(void) +{ + stm32mp1_clk_lock(®_lock); +} + +void stm32mp1_clk_rcc_regs_unlock(void) +{ + stm32mp1_clk_unlock(®_lock); +} + +static unsigned long stm32mp1_clk_get_fixed(enum stm32mp_osc_id idx) +{ + if (idx >= NB_OSC) { + return 0; + } + + return stm32mp1_osc[idx]; +} + +static int stm32mp1_clk_get_gated_id(unsigned long id) +{ + unsigned int i; + + for (i = 0U; i < NB_GATES; i++) { + if (gate_ref(i)->index == id) { + return i; + } + } + + ERROR("%s: clk id %lu not found\n", __func__, id); + + return -EINVAL; +} + +static enum stm32mp1_parent_sel stm32mp1_clk_get_sel(int i) +{ + return (enum stm32mp1_parent_sel)(gate_ref(i)->sel); +} + +static enum stm32mp1_parent_id stm32mp1_clk_get_fixed_parent(int i) +{ + return (enum stm32mp1_parent_id)(gate_ref(i)->fixed); +} + +static int stm32mp1_clk_get_parent(unsigned long id) +{ + const struct stm32mp1_clk_sel *sel; + uint32_t p_sel; + int i; + enum stm32mp1_parent_id p; + enum stm32mp1_parent_sel s; + uintptr_t rcc_base = stm32mp_rcc_base(); + + /* Few non gateable clock have a static parent ID, find them */ + i = (int)clock_id2parent_id(id); + if (i != _UNKNOWN_ID) { + return i; + } + + i = stm32mp1_clk_get_gated_id(id); + if (i < 0) { + panic(); + } + + p = stm32mp1_clk_get_fixed_parent(i); + if (p < _PARENT_NB) { + return (int)p; + } + + s = stm32mp1_clk_get_sel(i); + if (s == _UNKNOWN_SEL) { + return -EINVAL; + } + if (s >= _PARENT_SEL_NB) { + panic(); + } + + sel = clk_sel_ref(s); + p_sel = (mmio_read_32(rcc_base + sel->offset) & + (sel->msk << sel->src)) >> sel->src; + if (p_sel < sel->nb_parent) { + return (int)sel->parent[p_sel]; + } + + return -EINVAL; +} + +static unsigned long stm32mp1_pll_get_fref(const struct stm32mp1_clk_pll *pll) +{ + uint32_t selr = mmio_read_32(stm32mp_rcc_base() + pll->rckxselr); + uint32_t src = selr & RCC_SELR_REFCLK_SRC_MASK; + + return stm32mp1_clk_get_fixed(pll->refclk[src]); +} + +/* + * pll_get_fvco() : return the VCO or (VCO / 2) frequency for the requested PLL + * - PLL1 & PLL2 => return VCO / 2 with Fpll_y_ck = FVCO / 2 * (DIVy + 1) + * - PLL3 & PLL4 => return VCO with Fpll_y_ck = FVCO / (DIVy + 1) + * => in all cases Fpll_y_ck = pll_get_fvco() / (DIVy + 1) + */ +static unsigned long stm32mp1_pll_get_fvco(const struct stm32mp1_clk_pll *pll) +{ + unsigned long refclk, fvco; + uint32_t cfgr1, fracr, divm, divn; + uintptr_t rcc_base = stm32mp_rcc_base(); + + cfgr1 = mmio_read_32(rcc_base + pll->pllxcfgr1); + fracr = mmio_read_32(rcc_base + pll->pllxfracr); + + divm = (cfgr1 & (RCC_PLLNCFGR1_DIVM_MASK)) >> RCC_PLLNCFGR1_DIVM_SHIFT; + divn = cfgr1 & RCC_PLLNCFGR1_DIVN_MASK; + + refclk = stm32mp1_pll_get_fref(pll); + + /* + * With FRACV : + * Fvco = Fck_ref * ((DIVN + 1) + FRACV / 2^13) / (DIVM + 1) + * Without FRACV + * Fvco = Fck_ref * ((DIVN + 1) / (DIVM + 1) + */ + if ((fracr & RCC_PLLNFRACR_FRACLE) != 0U) { + uint32_t fracv = (fracr & RCC_PLLNFRACR_FRACV_MASK) >> + RCC_PLLNFRACR_FRACV_SHIFT; + unsigned long long numerator, denominator; + + numerator = (((unsigned long long)divn + 1U) << 13) + fracv; + numerator = refclk * numerator; + denominator = ((unsigned long long)divm + 1U) << 13; + fvco = (unsigned long)(numerator / denominator); + } else { + fvco = (unsigned long)(refclk * (divn + 1U) / (divm + 1U)); + } + + return fvco; +} + +static unsigned long stm32mp1_read_pll_freq(enum stm32mp1_pll_id pll_id, + enum stm32mp1_div_id div_id) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + unsigned long dfout; + uint32_t cfgr2, divy; + + if (div_id >= _DIV_NB) { + return 0; + } + + cfgr2 = mmio_read_32(stm32mp_rcc_base() + pll->pllxcfgr2); + divy = (cfgr2 >> pllncfgr2[div_id]) & RCC_PLLNCFGR2_DIVX_MASK; + + dfout = stm32mp1_pll_get_fvco(pll) / (divy + 1U); + + return dfout; +} + +static unsigned long get_clock_rate(int p) +{ + uint32_t reg, clkdiv; + unsigned long clock = 0; + uintptr_t rcc_base = stm32mp_rcc_base(); + + switch (p) { + case _CK_MPU: + /* MPU sub system */ + reg = mmio_read_32(rcc_base + RCC_MPCKSELR); + switch (reg & RCC_SELR_SRC_MASK) { + case RCC_MPCKSELR_HSI: + clock = stm32mp1_clk_get_fixed(_HSI); + break; + case RCC_MPCKSELR_HSE: + clock = stm32mp1_clk_get_fixed(_HSE); + break; + case RCC_MPCKSELR_PLL: + clock = stm32mp1_read_pll_freq(_PLL1, _DIV_P); + break; + case RCC_MPCKSELR_PLL_MPUDIV: + clock = stm32mp1_read_pll_freq(_PLL1, _DIV_P); + + reg = mmio_read_32(rcc_base + RCC_MPCKDIVR); + clkdiv = reg & RCC_MPUDIV_MASK; + clock >>= stm32mp1_mpu_div[clkdiv]; + break; + default: + break; + } + break; + /* AXI sub system */ + case _ACLK: + case _HCLK2: + case _HCLK6: + case _PCLK4: + case _PCLK5: + reg = mmio_read_32(rcc_base + RCC_ASSCKSELR); + switch (reg & RCC_SELR_SRC_MASK) { + case RCC_ASSCKSELR_HSI: + clock = stm32mp1_clk_get_fixed(_HSI); + break; + case RCC_ASSCKSELR_HSE: + clock = stm32mp1_clk_get_fixed(_HSE); + break; + case RCC_ASSCKSELR_PLL: + clock = stm32mp1_read_pll_freq(_PLL2, _DIV_P); + break; + default: + break; + } + + /* System clock divider */ + reg = mmio_read_32(rcc_base + RCC_AXIDIVR); + clock /= stm32mp1_axi_div[reg & RCC_AXIDIV_MASK]; + + switch (p) { + case _PCLK4: + reg = mmio_read_32(rcc_base + RCC_APB4DIVR); + clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; + break; + case _PCLK5: + reg = mmio_read_32(rcc_base + RCC_APB5DIVR); + clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; + break; + default: + break; + } + break; + /* MCU sub system */ + case _CK_MCU: + case _PCLK1: + case _PCLK2: + case _PCLK3: + reg = mmio_read_32(rcc_base + RCC_MSSCKSELR); + switch (reg & RCC_SELR_SRC_MASK) { + case RCC_MSSCKSELR_HSI: + clock = stm32mp1_clk_get_fixed(_HSI); + break; + case RCC_MSSCKSELR_HSE: + clock = stm32mp1_clk_get_fixed(_HSE); + break; + case RCC_MSSCKSELR_CSI: + clock = stm32mp1_clk_get_fixed(_CSI); + break; + case RCC_MSSCKSELR_PLL: + clock = stm32mp1_read_pll_freq(_PLL3, _DIV_P); + break; + default: + break; + } + + /* MCU clock divider */ + reg = mmio_read_32(rcc_base + RCC_MCUDIVR); + clock >>= stm32mp1_mcu_div[reg & RCC_MCUDIV_MASK]; + + switch (p) { + case _PCLK1: + reg = mmio_read_32(rcc_base + RCC_APB1DIVR); + clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; + break; + case _PCLK2: + reg = mmio_read_32(rcc_base + RCC_APB2DIVR); + clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; + break; + case _PCLK3: + reg = mmio_read_32(rcc_base + RCC_APB3DIVR); + clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; + break; + case _CK_MCU: + default: + break; + } + break; + case _CK_PER: + reg = mmio_read_32(rcc_base + RCC_CPERCKSELR); + switch (reg & RCC_SELR_SRC_MASK) { + case RCC_CPERCKSELR_HSI: + clock = stm32mp1_clk_get_fixed(_HSI); + break; + case RCC_CPERCKSELR_HSE: + clock = stm32mp1_clk_get_fixed(_HSE); + break; + case RCC_CPERCKSELR_CSI: + clock = stm32mp1_clk_get_fixed(_CSI); + break; + default: + break; + } + break; + case _HSI: + case _HSI_KER: + clock = stm32mp1_clk_get_fixed(_HSI); + break; + case _CSI: + case _CSI_KER: + clock = stm32mp1_clk_get_fixed(_CSI); + break; + case _HSE: + case _HSE_KER: + clock = stm32mp1_clk_get_fixed(_HSE); + break; + case _HSE_KER_DIV2: + clock = stm32mp1_clk_get_fixed(_HSE) >> 1; + break; + case _HSE_RTC: + clock = stm32mp1_clk_get_fixed(_HSE); + clock /= (mmio_read_32(rcc_base + RCC_RTCDIVR) & RCC_DIVR_DIV_MASK) + 1U; + break; + case _LSI: + clock = stm32mp1_clk_get_fixed(_LSI); + break; + case _LSE: + clock = stm32mp1_clk_get_fixed(_LSE); + break; + /* PLL */ + case _PLL1_P: + clock = stm32mp1_read_pll_freq(_PLL1, _DIV_P); + break; + case _PLL1_Q: + clock = stm32mp1_read_pll_freq(_PLL1, _DIV_Q); + break; + case _PLL1_R: + clock = stm32mp1_read_pll_freq(_PLL1, _DIV_R); + break; + case _PLL2_P: + clock = stm32mp1_read_pll_freq(_PLL2, _DIV_P); + break; + case _PLL2_Q: + clock = stm32mp1_read_pll_freq(_PLL2, _DIV_Q); + break; + case _PLL2_R: + clock = stm32mp1_read_pll_freq(_PLL2, _DIV_R); + break; + case _PLL3_P: + clock = stm32mp1_read_pll_freq(_PLL3, _DIV_P); + break; + case _PLL3_Q: + clock = stm32mp1_read_pll_freq(_PLL3, _DIV_Q); + break; + case _PLL3_R: + clock = stm32mp1_read_pll_freq(_PLL3, _DIV_R); + break; + case _PLL4_P: + clock = stm32mp1_read_pll_freq(_PLL4, _DIV_P); + break; + case _PLL4_Q: + clock = stm32mp1_read_pll_freq(_PLL4, _DIV_Q); + break; + case _PLL4_R: + clock = stm32mp1_read_pll_freq(_PLL4, _DIV_R); + break; + /* Other */ + case _USB_PHY_48: + clock = USB_PHY_48_MHZ; + break; + default: + break; + } + + return clock; +} + +static void __clk_enable(struct stm32mp1_clk_gate const *gate) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + + VERBOSE("Enable clock %u\n", gate->index); + + if (gate->set_clr != 0U) { + mmio_write_32(rcc_base + gate->offset, BIT(gate->bit)); + } else { + mmio_setbits_32(rcc_base + gate->offset, BIT(gate->bit)); + } +} + +static void __clk_disable(struct stm32mp1_clk_gate const *gate) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + + VERBOSE("Disable clock %u\n", gate->index); + + if (gate->set_clr != 0U) { + mmio_write_32(rcc_base + gate->offset + RCC_MP_ENCLRR_OFFSET, + BIT(gate->bit)); + } else { + mmio_clrbits_32(rcc_base + gate->offset, BIT(gate->bit)); + } +} + +static bool __clk_is_enabled(struct stm32mp1_clk_gate const *gate) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + + return mmio_read_32(rcc_base + gate->offset) & BIT(gate->bit); +} + +/* Oscillators and PLLs are not gated at runtime */ +static bool clock_is_always_on(unsigned long id) +{ + switch (id) { + case CK_HSE: + case CK_CSI: + case CK_LSI: + case CK_LSE: + case CK_HSI: + case CK_HSE_DIV2: + case PLL1_Q: + case PLL1_R: + case PLL2_P: + case PLL2_Q: + case PLL2_R: + case PLL3_P: + case PLL3_Q: + case PLL3_R: + case CK_AXI: + case CK_MPU: + case CK_MCU: + case RTC: + return true; + default: + return false; + } +} + +static void __stm32mp1_clk_enable(unsigned long id, bool with_refcnt) +{ + const struct stm32mp1_clk_gate *gate; + int i; + + if (clock_is_always_on(id)) { + return; + } + + i = stm32mp1_clk_get_gated_id(id); + if (i < 0) { + ERROR("Clock %lu can't be enabled\n", id); + panic(); + } + + gate = gate_ref(i); + + if (!with_refcnt) { + __clk_enable(gate); + return; + } + +#if defined(IMAGE_BL32) + if (gate_is_non_secure(gate)) { + /* Enable non-secure clock w/o any refcounting */ + __clk_enable(gate); + return; + } +#endif + + stm32mp1_clk_lock(&refcount_lock); + + if (gate_refcounts[i] == 0U) { + __clk_enable(gate); + } + + gate_refcounts[i]++; + if (gate_refcounts[i] == UINT_MAX) { + ERROR("Clock %lu refcount reached max value\n", id); + panic(); + } + + stm32mp1_clk_unlock(&refcount_lock); +} + +static void __stm32mp1_clk_disable(unsigned long id, bool with_refcnt) +{ + const struct stm32mp1_clk_gate *gate; + int i; + + if (clock_is_always_on(id)) { + return; + } + + i = stm32mp1_clk_get_gated_id(id); + if (i < 0) { + ERROR("Clock %lu can't be disabled\n", id); + panic(); + } + + gate = gate_ref(i); + + if (!with_refcnt) { + __clk_disable(gate); + return; + } + +#if defined(IMAGE_BL32) + if (gate_is_non_secure(gate)) { + /* Don't disable non-secure clocks */ + return; + } +#endif + + stm32mp1_clk_lock(&refcount_lock); + + if (gate_refcounts[i] == 0U) { + ERROR("Clock %lu refcount reached 0\n", id); + panic(); + } + gate_refcounts[i]--; + + if (gate_refcounts[i] == 0U) { + __clk_disable(gate); + } + + stm32mp1_clk_unlock(&refcount_lock); +} + +static int stm32mp_clk_enable(unsigned long id) +{ + __stm32mp1_clk_enable(id, true); + + return 0; +} + +static void stm32mp_clk_disable(unsigned long id) +{ + __stm32mp1_clk_disable(id, true); +} + +static bool stm32mp_clk_is_enabled(unsigned long id) +{ + int i; + + if (clock_is_always_on(id)) { + return true; + } + + i = stm32mp1_clk_get_gated_id(id); + if (i < 0) { + panic(); + } + + return __clk_is_enabled(gate_ref(i)); +} + +static unsigned long stm32mp_clk_get_rate(unsigned long id) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + int p = stm32mp1_clk_get_parent(id); + uint32_t prescaler, timpre; + unsigned long parent_rate; + + if (p < 0) { + return 0; + } + + parent_rate = get_clock_rate(p); + + switch (id) { + case TIM2_K: + case TIM3_K: + case TIM4_K: + case TIM5_K: + case TIM6_K: + case TIM7_K: + case TIM12_K: + case TIM13_K: + case TIM14_K: + prescaler = mmio_read_32(rcc_base + RCC_APB1DIVR) & + RCC_APBXDIV_MASK; + timpre = mmio_read_32(rcc_base + RCC_TIMG1PRER) & + RCC_TIMGXPRER_TIMGXPRE; + break; + + case TIM1_K: + case TIM8_K: + case TIM15_K: + case TIM16_K: + case TIM17_K: + prescaler = mmio_read_32(rcc_base + RCC_APB2DIVR) & + RCC_APBXDIV_MASK; + timpre = mmio_read_32(rcc_base + RCC_TIMG2PRER) & + RCC_TIMGXPRER_TIMGXPRE; + break; + + default: + return parent_rate; + } + + if (prescaler == 0U) { + return parent_rate; + } + + return parent_rate * (timpre + 1U) * 2U; +} + +static void stm32mp1_ls_osc_set(bool enable, uint32_t offset, uint32_t mask_on) +{ + uintptr_t address = stm32mp_rcc_base() + offset; + + if (enable) { + mmio_setbits_32(address, mask_on); + } else { + mmio_clrbits_32(address, mask_on); + } +} + +static void stm32mp1_hs_ocs_set(bool enable, uint32_t mask_on) +{ + uint32_t offset = enable ? RCC_OCENSETR : RCC_OCENCLRR; + uintptr_t address = stm32mp_rcc_base() + offset; + + mmio_write_32(address, mask_on); +} + +static int stm32mp1_osc_wait(bool enable, uint32_t offset, uint32_t mask_rdy) +{ + uint64_t timeout; + uint32_t mask_test; + uintptr_t address = stm32mp_rcc_base() + offset; + + if (enable) { + mask_test = mask_rdy; + } else { + mask_test = 0; + } + + timeout = timeout_init_us(OSCRDY_TIMEOUT); + while ((mmio_read_32(address) & mask_rdy) != mask_test) { + if (timeout_elapsed(timeout)) { + ERROR("OSC %x @ %lx timeout for enable=%d : 0x%x\n", + mask_rdy, address, enable, mmio_read_32(address)); + return -ETIMEDOUT; + } + } + + return 0; +} + +static void stm32mp1_lse_enable(bool bypass, bool digbyp, uint32_t lsedrv) +{ + uint32_t value; + uintptr_t rcc_base = stm32mp_rcc_base(); + + if (digbyp) { + mmio_setbits_32(rcc_base + RCC_BDCR, RCC_BDCR_DIGBYP); + } + + if (bypass || digbyp) { + mmio_setbits_32(rcc_base + RCC_BDCR, RCC_BDCR_LSEBYP); + } + + /* + * Warning: not recommended to switch directly from "high drive" + * to "medium low drive", and vice-versa. + */ + value = (mmio_read_32(rcc_base + RCC_BDCR) & RCC_BDCR_LSEDRV_MASK) >> + RCC_BDCR_LSEDRV_SHIFT; + + while (value != lsedrv) { + if (value > lsedrv) { + value--; + } else { + value++; + } + + mmio_clrsetbits_32(rcc_base + RCC_BDCR, + RCC_BDCR_LSEDRV_MASK, + value << RCC_BDCR_LSEDRV_SHIFT); + } + + stm32mp1_ls_osc_set(true, RCC_BDCR, RCC_BDCR_LSEON); +} + +static void stm32mp1_lse_wait(void) +{ + if (stm32mp1_osc_wait(true, RCC_BDCR, RCC_BDCR_LSERDY) != 0) { + VERBOSE("%s: failed\n", __func__); + } +} + +static void stm32mp1_lsi_set(bool enable) +{ + stm32mp1_ls_osc_set(enable, RCC_RDLSICR, RCC_RDLSICR_LSION); + + if (stm32mp1_osc_wait(enable, RCC_RDLSICR, RCC_RDLSICR_LSIRDY) != 0) { + VERBOSE("%s: failed\n", __func__); + } +} + +static void stm32mp1_hse_enable(bool bypass, bool digbyp, bool css) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + + if (digbyp) { + mmio_write_32(rcc_base + RCC_OCENSETR, RCC_OCENR_DIGBYP); + } + + if (bypass || digbyp) { + mmio_write_32(rcc_base + RCC_OCENSETR, RCC_OCENR_HSEBYP); + } + + stm32mp1_hs_ocs_set(true, RCC_OCENR_HSEON); + if (stm32mp1_osc_wait(true, RCC_OCRDYR, RCC_OCRDYR_HSERDY) != 0) { + VERBOSE("%s: failed\n", __func__); + } + + if (css) { + mmio_write_32(rcc_base + RCC_OCENSETR, RCC_OCENR_HSECSSON); + } + +#if STM32MP_UART_PROGRAMMER || STM32MP_USB_PROGRAMMER + if ((mmio_read_32(rcc_base + RCC_OCENSETR) & RCC_OCENR_HSEBYP) && + (!(digbyp || bypass))) { + panic(); + } +#endif +} + +static void stm32mp1_csi_set(bool enable) +{ + stm32mp1_hs_ocs_set(enable, RCC_OCENR_CSION); + if (stm32mp1_osc_wait(enable, RCC_OCRDYR, RCC_OCRDYR_CSIRDY) != 0) { + VERBOSE("%s: failed\n", __func__); + } +} + +static void stm32mp1_hsi_set(bool enable) +{ + stm32mp1_hs_ocs_set(enable, RCC_OCENR_HSION); + if (stm32mp1_osc_wait(enable, RCC_OCRDYR, RCC_OCRDYR_HSIRDY) != 0) { + VERBOSE("%s: failed\n", __func__); + } +} + +static int stm32mp1_set_hsidiv(uint8_t hsidiv) +{ + uint64_t timeout; + uintptr_t rcc_base = stm32mp_rcc_base(); + uintptr_t address = rcc_base + RCC_OCRDYR; + + mmio_clrsetbits_32(rcc_base + RCC_HSICFGR, + RCC_HSICFGR_HSIDIV_MASK, + RCC_HSICFGR_HSIDIV_MASK & (uint32_t)hsidiv); + + timeout = timeout_init_us(HSIDIV_TIMEOUT); + while ((mmio_read_32(address) & RCC_OCRDYR_HSIDIVRDY) == 0U) { + if (timeout_elapsed(timeout)) { + ERROR("HSIDIV failed @ 0x%lx: 0x%x\n", + address, mmio_read_32(address)); + return -ETIMEDOUT; + } + } + + return 0; +} + +static int stm32mp1_hsidiv(unsigned long hsifreq) +{ + uint8_t hsidiv; + uint32_t hsidivfreq = MAX_HSI_HZ; + + for (hsidiv = 0; hsidiv < 4U; hsidiv++) { + if (hsidivfreq == hsifreq) { + break; + } + + hsidivfreq /= 2U; + } + + if (hsidiv == 4U) { + ERROR("Invalid clk-hsi frequency\n"); + return -1; + } + + if (hsidiv != 0U) { + return stm32mp1_set_hsidiv(hsidiv); + } + + return 0; +} + +static bool stm32mp1_check_pll_conf(enum stm32mp1_pll_id pll_id, + unsigned int clksrc, + uint32_t *pllcfg, int plloff) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uintptr_t rcc_base = stm32mp_rcc_base(); + uintptr_t pllxcr = rcc_base + pll->pllxcr; + enum stm32mp1_plltype type = pll->plltype; + uintptr_t clksrc_address = rcc_base + (clksrc >> 4); + unsigned long refclk; + uint32_t ifrge = 0U; + uint32_t src, value, fracv = 0; + void *fdt; + + /* Check PLL output */ + if (mmio_read_32(pllxcr) != RCC_PLLNCR_PLLON) { + return false; + } + + /* Check current clksrc */ + src = mmio_read_32(clksrc_address) & RCC_SELR_SRC_MASK; + if (src != (clksrc & RCC_SELR_SRC_MASK)) { + return false; + } + + /* Check Div */ + src = mmio_read_32(rcc_base + pll->rckxselr) & RCC_SELR_REFCLK_SRC_MASK; + + refclk = stm32mp1_clk_get_fixed(pll->refclk[src]) / + (pllcfg[PLLCFG_M] + 1U); + + if ((refclk < (stm32mp1_pll[type].refclk_min * 1000000U)) || + (refclk > (stm32mp1_pll[type].refclk_max * 1000000U))) { + return false; + } + + if ((type == PLL_800) && (refclk >= 8000000U)) { + ifrge = 1U; + } + + value = (pllcfg[PLLCFG_N] << RCC_PLLNCFGR1_DIVN_SHIFT) & + RCC_PLLNCFGR1_DIVN_MASK; + value |= (pllcfg[PLLCFG_M] << RCC_PLLNCFGR1_DIVM_SHIFT) & + RCC_PLLNCFGR1_DIVM_MASK; + value |= (ifrge << RCC_PLLNCFGR1_IFRGE_SHIFT) & + RCC_PLLNCFGR1_IFRGE_MASK; + if (mmio_read_32(rcc_base + pll->pllxcfgr1) != value) { + return false; + } + + /* Fractional configuration */ + if (fdt_get_address(&fdt) == 1) { + fracv = fdt_read_uint32_default(fdt, plloff, "frac", 0); + } + + value = fracv << RCC_PLLNFRACR_FRACV_SHIFT; + value |= RCC_PLLNFRACR_FRACLE; + if (mmio_read_32(rcc_base + pll->pllxfracr) != value) { + return false; + } + + /* Output config */ + value = (pllcfg[PLLCFG_P] << RCC_PLLNCFGR2_DIVP_SHIFT) & + RCC_PLLNCFGR2_DIVP_MASK; + value |= (pllcfg[PLLCFG_Q] << RCC_PLLNCFGR2_DIVQ_SHIFT) & + RCC_PLLNCFGR2_DIVQ_MASK; + value |= (pllcfg[PLLCFG_R] << RCC_PLLNCFGR2_DIVR_SHIFT) & + RCC_PLLNCFGR2_DIVR_MASK; + if (mmio_read_32(rcc_base + pll->pllxcfgr2) != value) { + return false; + } + + return true; +} + +static void stm32mp1_pll_start(enum stm32mp1_pll_id pll_id) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uintptr_t pllxcr = stm32mp_rcc_base() + pll->pllxcr; + + /* Preserve RCC_PLLNCR_SSCG_CTRL value */ + mmio_clrsetbits_32(pllxcr, + RCC_PLLNCR_DIVPEN | RCC_PLLNCR_DIVQEN | + RCC_PLLNCR_DIVREN, + RCC_PLLNCR_PLLON); +} + +static int stm32mp1_pll_output(enum stm32mp1_pll_id pll_id, uint32_t output) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uintptr_t pllxcr = stm32mp_rcc_base() + pll->pllxcr; + uint64_t timeout = timeout_init_us(PLLRDY_TIMEOUT); + + /* Wait PLL lock */ + while ((mmio_read_32(pllxcr) & RCC_PLLNCR_PLLRDY) == 0U) { + if (timeout_elapsed(timeout)) { + ERROR("PLL%u start failed @ 0x%lx: 0x%x\n", + pll_id, pllxcr, mmio_read_32(pllxcr)); + return -ETIMEDOUT; + } + } + + /* Start the requested output */ + mmio_setbits_32(pllxcr, output << RCC_PLLNCR_DIVEN_SHIFT); + + return 0; +} + +static int stm32mp1_pll_stop(enum stm32mp1_pll_id pll_id) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uintptr_t pllxcr = stm32mp_rcc_base() + pll->pllxcr; + uint64_t timeout; + + /* Stop all output */ + mmio_clrbits_32(pllxcr, RCC_PLLNCR_DIVPEN | RCC_PLLNCR_DIVQEN | + RCC_PLLNCR_DIVREN); + + /* Stop PLL */ + mmio_clrbits_32(pllxcr, RCC_PLLNCR_PLLON); + + timeout = timeout_init_us(PLLRDY_TIMEOUT); + /* Wait PLL stopped */ + while ((mmio_read_32(pllxcr) & RCC_PLLNCR_PLLRDY) != 0U) { + if (timeout_elapsed(timeout)) { + ERROR("PLL%u stop failed @ 0x%lx: 0x%x\n", + pll_id, pllxcr, mmio_read_32(pllxcr)); + return -ETIMEDOUT; + } + } + + return 0; +} + +static void stm32mp1_pll_config_output(enum stm32mp1_pll_id pll_id, + uint32_t *pllcfg) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uintptr_t rcc_base = stm32mp_rcc_base(); + uint32_t value; + + value = (pllcfg[PLLCFG_P] << RCC_PLLNCFGR2_DIVP_SHIFT) & + RCC_PLLNCFGR2_DIVP_MASK; + value |= (pllcfg[PLLCFG_Q] << RCC_PLLNCFGR2_DIVQ_SHIFT) & + RCC_PLLNCFGR2_DIVQ_MASK; + value |= (pllcfg[PLLCFG_R] << RCC_PLLNCFGR2_DIVR_SHIFT) & + RCC_PLLNCFGR2_DIVR_MASK; + mmio_write_32(rcc_base + pll->pllxcfgr2, value); +} + +static int stm32mp1_pll_config(enum stm32mp1_pll_id pll_id, + uint32_t *pllcfg, uint32_t fracv) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uintptr_t rcc_base = stm32mp_rcc_base(); + enum stm32mp1_plltype type = pll->plltype; + unsigned long refclk; + uint32_t ifrge = 0; + uint32_t src, value; + + src = mmio_read_32(rcc_base + pll->rckxselr) & + RCC_SELR_REFCLK_SRC_MASK; + + refclk = stm32mp1_clk_get_fixed(pll->refclk[src]) / + (pllcfg[PLLCFG_M] + 1U); + + if ((refclk < (stm32mp1_pll[type].refclk_min * 1000000U)) || + (refclk > (stm32mp1_pll[type].refclk_max * 1000000U))) { + return -EINVAL; + } + + if ((type == PLL_800) && (refclk >= 8000000U)) { + ifrge = 1U; + } + + value = (pllcfg[PLLCFG_N] << RCC_PLLNCFGR1_DIVN_SHIFT) & + RCC_PLLNCFGR1_DIVN_MASK; + value |= (pllcfg[PLLCFG_M] << RCC_PLLNCFGR1_DIVM_SHIFT) & + RCC_PLLNCFGR1_DIVM_MASK; + value |= (ifrge << RCC_PLLNCFGR1_IFRGE_SHIFT) & + RCC_PLLNCFGR1_IFRGE_MASK; + mmio_write_32(rcc_base + pll->pllxcfgr1, value); + + /* Fractional configuration */ + value = 0; + mmio_write_32(rcc_base + pll->pllxfracr, value); + + value = fracv << RCC_PLLNFRACR_FRACV_SHIFT; + mmio_write_32(rcc_base + pll->pllxfracr, value); + + value |= RCC_PLLNFRACR_FRACLE; + mmio_write_32(rcc_base + pll->pllxfracr, value); + + stm32mp1_pll_config_output(pll_id, pllcfg); + + return 0; +} + +static void stm32mp1_pll_csg(enum stm32mp1_pll_id pll_id, uint32_t *csg) +{ + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + uint32_t pllxcsg = 0; + + pllxcsg |= (csg[PLLCSG_MOD_PER] << RCC_PLLNCSGR_MOD_PER_SHIFT) & + RCC_PLLNCSGR_MOD_PER_MASK; + + pllxcsg |= (csg[PLLCSG_INC_STEP] << RCC_PLLNCSGR_INC_STEP_SHIFT) & + RCC_PLLNCSGR_INC_STEP_MASK; + + pllxcsg |= (csg[PLLCSG_SSCG_MODE] << RCC_PLLNCSGR_SSCG_MODE_SHIFT) & + RCC_PLLNCSGR_SSCG_MODE_MASK; + + mmio_write_32(stm32mp_rcc_base() + pll->pllxcsgr, pllxcsg); + + mmio_setbits_32(stm32mp_rcc_base() + pll->pllxcr, + RCC_PLLNCR_SSCG_CTRL); +} + +static int stm32mp1_set_clksrc(unsigned int clksrc) +{ + uintptr_t clksrc_address = stm32mp_rcc_base() + (clksrc >> 4); + uint64_t timeout; + + mmio_clrsetbits_32(clksrc_address, RCC_SELR_SRC_MASK, + clksrc & RCC_SELR_SRC_MASK); + + timeout = timeout_init_us(CLKSRC_TIMEOUT); + while ((mmio_read_32(clksrc_address) & RCC_SELR_SRCRDY) == 0U) { + if (timeout_elapsed(timeout)) { + ERROR("CLKSRC %x start failed @ 0x%lx: 0x%x\n", clksrc, + clksrc_address, mmio_read_32(clksrc_address)); + return -ETIMEDOUT; + } + } + + return 0; +} + +static int stm32mp1_set_clkdiv(unsigned int clkdiv, uintptr_t address) +{ + uint64_t timeout; + + mmio_clrsetbits_32(address, RCC_DIVR_DIV_MASK, + clkdiv & RCC_DIVR_DIV_MASK); + + timeout = timeout_init_us(CLKDIV_TIMEOUT); + while ((mmio_read_32(address) & RCC_DIVR_DIVRDY) == 0U) { + if (timeout_elapsed(timeout)) { + ERROR("CLKDIV %x start failed @ 0x%lx: 0x%x\n", + clkdiv, address, mmio_read_32(address)); + return -ETIMEDOUT; + } + } + + return 0; +} + +static void stm32mp1_mco_csg(uint32_t clksrc, uint32_t clkdiv) +{ + uintptr_t clksrc_address = stm32mp_rcc_base() + (clksrc >> 4); + + /* + * Binding clksrc : + * bit15-4 offset + * bit3: disable + * bit2-0: MCOSEL[2:0] + */ + if ((clksrc & 0x8U) != 0U) { + mmio_clrbits_32(clksrc_address, RCC_MCOCFG_MCOON); + } else { + mmio_clrsetbits_32(clksrc_address, + RCC_MCOCFG_MCOSRC_MASK, + clksrc & RCC_MCOCFG_MCOSRC_MASK); + mmio_clrsetbits_32(clksrc_address, + RCC_MCOCFG_MCODIV_MASK, + clkdiv << RCC_MCOCFG_MCODIV_SHIFT); + mmio_setbits_32(clksrc_address, RCC_MCOCFG_MCOON); + } +} + +static void stm32mp1_set_rtcsrc(unsigned int clksrc, bool lse_css) +{ + uintptr_t address = stm32mp_rcc_base() + RCC_BDCR; + + if (((mmio_read_32(address) & RCC_BDCR_RTCCKEN) == 0U) || + (clksrc != (uint32_t)CLK_RTC_DISABLED)) { + mmio_clrsetbits_32(address, + RCC_BDCR_RTCSRC_MASK, + (clksrc & RCC_SELR_SRC_MASK) << RCC_BDCR_RTCSRC_SHIFT); + + mmio_setbits_32(address, RCC_BDCR_RTCCKEN); + } + + if (lse_css) { + mmio_setbits_32(address, RCC_BDCR_LSECSSON); + } +} + +static void stm32mp1_pkcs_config(uint32_t pkcs) +{ + uintptr_t address = stm32mp_rcc_base() + ((pkcs >> 4) & 0xFFFU); + uint32_t value = pkcs & 0xFU; + uint32_t mask = 0xFU; + + if ((pkcs & BIT(31)) != 0U) { + mask <<= 4; + value <<= 4; + } + + mmio_clrsetbits_32(address, mask, value); +} + +static int clk_get_pll_settings_from_dt(int plloff, unsigned int *pllcfg, + uint32_t *fracv, uint32_t *csg, + bool *csg_set) +{ + void *fdt; + int ret; + + if (fdt_get_address(&fdt) == 0) { + return -FDT_ERR_NOTFOUND; + } + + ret = fdt_read_uint32_array(fdt, plloff, "cfg", (uint32_t)PLLCFG_NB, + pllcfg); + if (ret < 0) { + return -FDT_ERR_NOTFOUND; + } + + *fracv = fdt_read_uint32_default(fdt, plloff, "frac", 0); + + ret = fdt_read_uint32_array(fdt, plloff, "csg", (uint32_t)PLLCSG_NB, + csg); + + *csg_set = (ret == 0); + + if (ret == -FDT_ERR_NOTFOUND) { + ret = 0; + } + + return ret; +} + +int stm32mp1_clk_init(void) +{ + uintptr_t rcc_base = stm32mp_rcc_base(); + uint32_t pllfracv[_PLL_NB]; + uint32_t pllcsg[_PLL_NB][PLLCSG_NB]; + unsigned int clksrc[CLKSRC_NB]; + unsigned int clkdiv[CLKDIV_NB]; + unsigned int pllcfg[_PLL_NB][PLLCFG_NB]; + int plloff[_PLL_NB]; + int ret, len; + enum stm32mp1_pll_id i; + bool pllcsg_set[_PLL_NB]; + bool pllcfg_valid[_PLL_NB]; + bool lse_css = false; + bool pll3_preserve = false; + bool pll4_preserve = false; + bool pll4_bootrom = false; + const fdt32_t *pkcs_cell; + void *fdt; + int stgen_p = stm32mp1_clk_get_parent(STGEN_K); + int usbphy_p = stm32mp1_clk_get_parent(USBPHY_K); + + if (fdt_get_address(&fdt) == 0) { + return -FDT_ERR_NOTFOUND; + } + + ret = fdt_rcc_read_uint32_array("st,clksrc", (uint32_t)CLKSRC_NB, + clksrc); + if (ret < 0) { + return -FDT_ERR_NOTFOUND; + } + + ret = fdt_rcc_read_uint32_array("st,clkdiv", (uint32_t)CLKDIV_NB, + clkdiv); + if (ret < 0) { + return -FDT_ERR_NOTFOUND; + } + + for (i = (enum stm32mp1_pll_id)0; i < _PLL_NB; i++) { + char name[12]; + + snprintf(name, sizeof(name), "st,pll@%u", i); + plloff[i] = fdt_rcc_subnode_offset(name); + + pllcfg_valid[i] = fdt_check_node(plloff[i]); + if (!pllcfg_valid[i]) { + continue; + } + + ret = clk_get_pll_settings_from_dt(plloff[i], pllcfg[i], + &pllfracv[i], pllcsg[i], + &pllcsg_set[i]); + if (ret != 0) { + return ret; + } + } + + stm32mp1_mco_csg(clksrc[CLKSRC_MCO1], clkdiv[CLKDIV_MCO1]); + stm32mp1_mco_csg(clksrc[CLKSRC_MCO2], clkdiv[CLKDIV_MCO2]); + + /* + * Switch ON oscillator found in device-tree. + * Note: HSI already ON after BootROM stage. + */ + if (stm32mp1_osc[_LSI] != 0U) { + stm32mp1_lsi_set(true); + } + if (stm32mp1_osc[_LSE] != 0U) { + const char *name = stm32mp_osc_node_label[_LSE]; + bool bypass, digbyp; + uint32_t lsedrv; + + bypass = fdt_clk_read_bool(name, "st,bypass"); + digbyp = fdt_clk_read_bool(name, "st,digbypass"); + lse_css = fdt_clk_read_bool(name, "st,css"); + lsedrv = fdt_clk_read_uint32_default(name, "st,drive", + LSEDRV_MEDIUM_HIGH); + stm32mp1_lse_enable(bypass, digbyp, lsedrv); + } + if (stm32mp1_osc[_HSE] != 0U) { + const char *name = stm32mp_osc_node_label[_HSE]; + bool bypass, digbyp, css; + + bypass = fdt_clk_read_bool(name, "st,bypass"); + digbyp = fdt_clk_read_bool(name, "st,digbypass"); + css = fdt_clk_read_bool(name, "st,css"); + stm32mp1_hse_enable(bypass, digbyp, css); + } + /* + * CSI is mandatory for automatic I/O compensation (SYSCFG_CMPCR) + * => switch on CSI even if node is not present in device tree + */ + stm32mp1_csi_set(true); + + /* Come back to HSI */ + ret = stm32mp1_set_clksrc(CLK_MPU_HSI); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clksrc(CLK_AXI_HSI); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clksrc(CLK_MCU_HSI); + if (ret != 0) { + return ret; + } + + if ((mmio_read_32(rcc_base + RCC_MP_RSTSCLRR) & + RCC_MP_RSTSCLRR_MPUP0RSTF) != 0) { + if (pllcfg_valid[_PLL3]) { + pll3_preserve = + stm32mp1_check_pll_conf(_PLL3, + clksrc[CLKSRC_PLL3], + pllcfg[_PLL3], + plloff[_PLL3]); + } + + if (pllcfg_valid[_PLL4]) { + pll4_preserve = + stm32mp1_check_pll_conf(_PLL4, + clksrc[CLKSRC_PLL4], + pllcfg[_PLL4], + plloff[_PLL4]); + } + } + /* Don't initialize PLL4, when used by BOOTROM */ + if ((stm32mp_get_boot_itf_selected() == + BOOT_API_CTX_BOOT_INTERFACE_SEL_SERIAL_USB) && + ((stgen_p == (int)_PLL4_R) || (usbphy_p == (int)_PLL4_R))) { + pll4_bootrom = true; + pll4_preserve = true; + } + + for (i = (enum stm32mp1_pll_id)0; i < _PLL_NB; i++) { + if (((i == _PLL3) && pll3_preserve) || + ((i == _PLL4) && pll4_preserve)) { + continue; + } + + ret = stm32mp1_pll_stop(i); + if (ret != 0) { + return ret; + } + } + + /* Configure HSIDIV */ + if (stm32mp1_osc[_HSI] != 0U) { + ret = stm32mp1_hsidiv(stm32mp1_osc[_HSI]); + if (ret != 0) { + return ret; + } + + stm32mp_stgen_config(stm32mp_clk_get_rate(STGEN_K)); + } + + /* Select DIV */ + /* No ready bit when MPUSRC != CLK_MPU_PLL1P_DIV, MPUDIV is disabled */ + mmio_write_32(rcc_base + RCC_MPCKDIVR, + clkdiv[CLKDIV_MPU] & RCC_DIVR_DIV_MASK); + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_AXI], rcc_base + RCC_AXIDIVR); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_APB4], rcc_base + RCC_APB4DIVR); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_APB5], rcc_base + RCC_APB5DIVR); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_MCU], rcc_base + RCC_MCUDIVR); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_APB1], rcc_base + RCC_APB1DIVR); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_APB2], rcc_base + RCC_APB2DIVR); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clkdiv(clkdiv[CLKDIV_APB3], rcc_base + RCC_APB3DIVR); + if (ret != 0) { + return ret; + } + + /* No ready bit for RTC */ + mmio_write_32(rcc_base + RCC_RTCDIVR, + clkdiv[CLKDIV_RTC] & RCC_DIVR_DIV_MASK); + + /* Configure PLLs source */ + ret = stm32mp1_set_clksrc(clksrc[CLKSRC_PLL12]); + if (ret != 0) { + return ret; + } + + if (!pll3_preserve) { + ret = stm32mp1_set_clksrc(clksrc[CLKSRC_PLL3]); + if (ret != 0) { + return ret; + } + } + + if (!pll4_preserve) { + ret = stm32mp1_set_clksrc(clksrc[CLKSRC_PLL4]); + if (ret != 0) { + return ret; + } + } + + /* Configure and start PLLs */ + for (i = (enum stm32mp1_pll_id)0; i < _PLL_NB; i++) { + if (((i == _PLL3) && pll3_preserve) || + ((i == _PLL4) && pll4_preserve && !pll4_bootrom)) { + continue; + } + + if (!pllcfg_valid[i]) { + continue; + } + + if ((i == _PLL4) && pll4_bootrom) { + /* Set output divider if not done by the Bootrom */ + stm32mp1_pll_config_output(i, pllcfg[i]); + continue; + } + + ret = stm32mp1_pll_config(i, pllcfg[i], pllfracv[i]); + if (ret != 0) { + return ret; + } + + if (pllcsg_set[i]) { + stm32mp1_pll_csg(i, pllcsg[i]); + } + + stm32mp1_pll_start(i); + } + /* Wait and start PLLs output when ready */ + for (i = (enum stm32mp1_pll_id)0; i < _PLL_NB; i++) { + if (!pllcfg_valid[i]) { + continue; + } + + ret = stm32mp1_pll_output(i, pllcfg[i][PLLCFG_O]); + if (ret != 0) { + return ret; + } + } + /* Wait LSE ready before to use it */ + if (stm32mp1_osc[_LSE] != 0U) { + stm32mp1_lse_wait(); + } + + /* Configure with expected clock source */ + ret = stm32mp1_set_clksrc(clksrc[CLKSRC_MPU]); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clksrc(clksrc[CLKSRC_AXI]); + if (ret != 0) { + return ret; + } + ret = stm32mp1_set_clksrc(clksrc[CLKSRC_MCU]); + if (ret != 0) { + return ret; + } + stm32mp1_set_rtcsrc(clksrc[CLKSRC_RTC], lse_css); + + /* Configure PKCK */ + pkcs_cell = fdt_rcc_read_prop("st,pkcs", &len); + if (pkcs_cell != NULL) { + bool ckper_disabled = false; + uint32_t j; + uint32_t usbreg_bootrom = 0U; + + if (pll4_bootrom) { + usbreg_bootrom = mmio_read_32(rcc_base + RCC_USBCKSELR); + } + + for (j = 0; j < ((uint32_t)len / sizeof(uint32_t)); j++) { + uint32_t pkcs = fdt32_to_cpu(pkcs_cell[j]); + + if (pkcs == (uint32_t)CLK_CKPER_DISABLED) { + ckper_disabled = true; + continue; + } + stm32mp1_pkcs_config(pkcs); + } + + /* + * CKPER is source for some peripheral clocks + * (FMC-NAND / QPSI-NOR) and switching source is allowed + * only if previous clock is still ON + * => deactivated CKPER only after switching clock + */ + if (ckper_disabled) { + stm32mp1_pkcs_config(CLK_CKPER_DISABLED); + } + + if (pll4_bootrom) { + uint32_t usbreg_value, usbreg_mask; + const struct stm32mp1_clk_sel *sel; + + sel = clk_sel_ref(_USBPHY_SEL); + usbreg_mask = (uint32_t)sel->msk << sel->src; + sel = clk_sel_ref(_USBO_SEL); + usbreg_mask |= (uint32_t)sel->msk << sel->src; + + usbreg_value = mmio_read_32(rcc_base + RCC_USBCKSELR) & + usbreg_mask; + usbreg_bootrom &= usbreg_mask; + if (usbreg_bootrom != usbreg_value) { + VERBOSE("forbidden new USB clk path\n"); + VERBOSE("vs bootrom on USB boot\n"); + return -FDT_ERR_BADVALUE; + } + } + } + + /* Switch OFF HSI if not found in device-tree */ + if (stm32mp1_osc[_HSI] == 0U) { + stm32mp1_hsi_set(false); + } + + stm32mp_stgen_config(stm32mp_clk_get_rate(STGEN_K)); + + /* Software Self-Refresh mode (SSR) during DDR initilialization */ + mmio_clrsetbits_32(rcc_base + RCC_DDRITFCR, + RCC_DDRITFCR_DDRCKMOD_MASK, + RCC_DDRITFCR_DDRCKMOD_SSR << + RCC_DDRITFCR_DDRCKMOD_SHIFT); + + return 0; +} + +static void stm32mp1_osc_clk_init(const char *name, + enum stm32mp_osc_id index) +{ + uint32_t frequency; + + if (fdt_osc_read_freq(name, &frequency) == 0) { + stm32mp1_osc[index] = frequency; + } +} + +static void stm32mp1_osc_init(void) +{ + enum stm32mp_osc_id i; + + for (i = (enum stm32mp_osc_id)0 ; i < NB_OSC; i++) { + stm32mp1_osc_clk_init(stm32mp_osc_node_label[i], i); + } +} + +#ifdef STM32MP_SHARED_RESOURCES +/* + * Get the parent ID of the target parent clock, for tagging as secure + * shared clock dependencies. + */ +static int get_parent_id_parent(unsigned int parent_id) +{ + enum stm32mp1_parent_sel s = _UNKNOWN_SEL; + enum stm32mp1_pll_id pll_id; + uint32_t p_sel; + uintptr_t rcc_base = stm32mp_rcc_base(); + + switch (parent_id) { + case _ACLK: + case _PCLK4: + case _PCLK5: + s = _AXIS_SEL; + break; + case _PLL1_P: + case _PLL1_Q: + case _PLL1_R: + pll_id = _PLL1; + break; + case _PLL2_P: + case _PLL2_Q: + case _PLL2_R: + pll_id = _PLL2; + break; + case _PLL3_P: + case _PLL3_Q: + case _PLL3_R: + pll_id = _PLL3; + break; + case _PLL4_P: + case _PLL4_Q: + case _PLL4_R: + pll_id = _PLL4; + break; + case _PCLK1: + case _PCLK2: + case _HCLK2: + case _HCLK6: + case _CK_PER: + case _CK_MPU: + case _CK_MCU: + case _USB_PHY_48: + /* We do not expect to access these */ + panic(); + break; + default: + /* Other parents have no parent */ + return -1; + } + + if (s != _UNKNOWN_SEL) { + const struct stm32mp1_clk_sel *sel = clk_sel_ref(s); + + p_sel = (mmio_read_32(rcc_base + sel->offset) >> sel->src) & + sel->msk; + + if (p_sel < sel->nb_parent) { + return (int)sel->parent[p_sel]; + } + } else { + const struct stm32mp1_clk_pll *pll = pll_ref(pll_id); + + p_sel = mmio_read_32(rcc_base + pll->rckxselr) & + RCC_SELR_REFCLK_SRC_MASK; + + if (pll->refclk[p_sel] != _UNKNOWN_OSC_ID) { + return (int)pll->refclk[p_sel]; + } + } + + VERBOSE("No parent selected for %s\n", + stm32mp1_clk_parent_name[parent_id]); + + return -1; +} + +static void secure_parent_clocks(unsigned long parent_id) +{ + int grandparent_id; + + switch (parent_id) { + case _PLL3_P: + case _PLL3_Q: + case _PLL3_R: + stm32mp_register_secure_periph(STM32MP1_SHRES_PLL3); + break; + + /* These clocks are always secure when RCC is secure */ + case _ACLK: + case _HCLK2: + case _HCLK6: + case _PCLK4: + case _PCLK5: + case _PLL1_P: + case _PLL1_Q: + case _PLL1_R: + case _PLL2_P: + case _PLL2_Q: + case _PLL2_R: + case _HSI: + case _HSI_KER: + case _LSI: + case _CSI: + case _CSI_KER: + case _HSE: + case _HSE_KER: + case _HSE_KER_DIV2: + case _HSE_RTC: + case _LSE: + break; + + default: + VERBOSE("Cannot secure parent clock %s\n", + stm32mp1_clk_parent_name[parent_id]); + panic(); + } + + grandparent_id = get_parent_id_parent(parent_id); + if (grandparent_id >= 0) { + secure_parent_clocks(grandparent_id); + } +} + +void stm32mp1_register_clock_parents_secure(unsigned long clock_id) +{ + int parent_id; + + if (!stm32mp1_rcc_is_secure()) { + return; + } + + switch (clock_id) { + case PLL1: + case PLL2: + /* PLL1/PLL2 are always secure: nothing to do */ + break; + case PLL3: + stm32mp_register_secure_periph(STM32MP1_SHRES_PLL3); + break; + case PLL4: + ERROR("PLL4 cannot be secured\n"); + panic(); + break; + default: + /* Others are expected gateable clock */ + parent_id = stm32mp1_clk_get_parent(clock_id); + if (parent_id < 0) { + INFO("No parent found for clock %lu\n", clock_id); + } else { + secure_parent_clocks(parent_id); + } + break; + } +} +#endif /* STM32MP_SHARED_RESOURCES */ + +static void sync_earlyboot_clocks_state(void) +{ + unsigned int idx; + const unsigned long secure_enable[] = { + AXIDCG, + BSEC, + DDRC1, DDRC1LP, + DDRC2, DDRC2LP, + DDRCAPB, DDRPHYCAPB, DDRPHYCAPBLP, + DDRPHYC, DDRPHYCLP, + RTCAPB, + TZC1, TZC2, + TZPC, + STGEN_K, + }; + + for (idx = 0U; idx < ARRAY_SIZE(secure_enable); idx++) { + stm32mp_clk_enable(secure_enable[idx]); + } +} + +static const struct clk_ops stm32mp_clk_ops = { + .enable = stm32mp_clk_enable, + .disable = stm32mp_clk_disable, + .is_enabled = stm32mp_clk_is_enabled, + .get_rate = stm32mp_clk_get_rate, + .get_parent = stm32mp1_clk_get_parent, +}; + +int stm32mp1_clk_probe(void) +{ +#if defined(IMAGE_BL32) + if (!fdt_get_rcc_secure_state()) { + mmio_write_32(stm32mp_rcc_base() + RCC_TZCR, 0U); + } +#endif + + stm32mp1_osc_init(); + + sync_earlyboot_clocks_state(); + + clk_register(&stm32mp_clk_ops); + + return 0; +} |