// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* * Copyright (C) 2018, STMicroelectronics - All Rights Reserved */ #include #include #include #include #include #include #include #include #include #include #include #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) /* activate clock tree initialization in the driver */ #define STM32MP1_CLOCK_TREE_INIT #endif #define MAX_HSI_HZ 64000000 /* TIMEOUT */ #define TIMEOUT_200MS 200000 #define TIMEOUT_1S 1000000 /* STGEN registers */ #define STGENC_CNTCR 0x00 #define STGENC_CNTSR 0x04 #define STGENC_CNTCVL 0x08 #define STGENC_CNTCVU 0x0C #define STGENC_CNTFID0 0x20 #define STGENC_CNTCR_EN BIT(0) /* RCC registers */ #define RCC_OCENSETR 0x0C #define RCC_OCENCLRR 0x10 #define RCC_HSICFGR 0x18 #define RCC_MPCKSELR 0x20 #define RCC_ASSCKSELR 0x24 #define RCC_RCK12SELR 0x28 #define RCC_MPCKDIVR 0x2C #define RCC_AXIDIVR 0x30 #define RCC_APB4DIVR 0x3C #define RCC_APB5DIVR 0x40 #define RCC_RTCDIVR 0x44 #define RCC_MSSCKSELR 0x48 #define RCC_PLL1CR 0x80 #define RCC_PLL1CFGR1 0x84 #define RCC_PLL1CFGR2 0x88 #define RCC_PLL1FRACR 0x8C #define RCC_PLL1CSGR 0x90 #define RCC_PLL2CR 0x94 #define RCC_PLL2CFGR1 0x98 #define RCC_PLL2CFGR2 0x9C #define RCC_PLL2FRACR 0xA0 #define RCC_PLL2CSGR 0xA4 #define RCC_I2C46CKSELR 0xC0 #define RCC_CPERCKSELR 0xD0 #define RCC_STGENCKSELR 0xD4 #define RCC_DDRITFCR 0xD8 #define RCC_BDCR 0x140 #define RCC_RDLSICR 0x144 #define RCC_MP_APB4ENSETR 0x200 #define RCC_MP_APB5ENSETR 0x208 #define RCC_MP_AHB5ENSETR 0x210 #define RCC_MP_AHB6ENSETR 0x218 #define RCC_OCRDYR 0x808 #define RCC_DBGCFGR 0x80C #define RCC_RCK3SELR 0x820 #define RCC_RCK4SELR 0x824 #define RCC_MCUDIVR 0x830 #define RCC_APB1DIVR 0x834 #define RCC_APB2DIVR 0x838 #define RCC_APB3DIVR 0x83C #define RCC_PLL3CR 0x880 #define RCC_PLL3CFGR1 0x884 #define RCC_PLL3CFGR2 0x888 #define RCC_PLL3FRACR 0x88C #define RCC_PLL3CSGR 0x890 #define RCC_PLL4CR 0x894 #define RCC_PLL4CFGR1 0x898 #define RCC_PLL4CFGR2 0x89C #define RCC_PLL4FRACR 0x8A0 #define RCC_PLL4CSGR 0x8A4 #define RCC_I2C12CKSELR 0x8C0 #define RCC_I2C35CKSELR 0x8C4 #define RCC_UART6CKSELR 0x8E4 #define RCC_UART24CKSELR 0x8E8 #define RCC_UART35CKSELR 0x8EC #define RCC_UART78CKSELR 0x8F0 #define RCC_SDMMC12CKSELR 0x8F4 #define RCC_SDMMC3CKSELR 0x8F8 #define RCC_ETHCKSELR 0x8FC #define RCC_QSPICKSELR 0x900 #define RCC_FMCCKSELR 0x904 #define RCC_USBCKSELR 0x91C #define RCC_MP_APB1ENSETR 0xA00 #define RCC_MP_APB2ENSETR 0XA08 #define RCC_MP_APB3ENSETR 0xA10 #define RCC_MP_AHB2ENSETR 0xA18 #define RCC_MP_AHB4ENSETR 0xA28 /* used for most of SELR register */ #define RCC_SELR_SRC_MASK GENMASK(2, 0) #define RCC_SELR_SRCRDY BIT(31) /* Values of RCC_MPCKSELR register */ #define RCC_MPCKSELR_HSI 0 #define RCC_MPCKSELR_HSE 1 #define RCC_MPCKSELR_PLL 2 #define RCC_MPCKSELR_PLL_MPUDIV 3 /* Values of RCC_ASSCKSELR register */ #define RCC_ASSCKSELR_HSI 0 #define RCC_ASSCKSELR_HSE 1 #define RCC_ASSCKSELR_PLL 2 /* Values of RCC_MSSCKSELR register */ #define RCC_MSSCKSELR_HSI 0 #define RCC_MSSCKSELR_HSE 1 #define RCC_MSSCKSELR_CSI 2 #define RCC_MSSCKSELR_PLL 3 /* Values of RCC_CPERCKSELR register */ #define RCC_CPERCKSELR_HSI 0 #define RCC_CPERCKSELR_CSI 1 #define RCC_CPERCKSELR_HSE 2 /* used for most of DIVR register : max div for RTC */ #define RCC_DIVR_DIV_MASK GENMASK(5, 0) #define RCC_DIVR_DIVRDY BIT(31) /* Masks for specific DIVR registers */ #define RCC_APBXDIV_MASK GENMASK(2, 0) #define RCC_MPUDIV_MASK GENMASK(2, 0) #define RCC_AXIDIV_MASK GENMASK(2, 0) #define RCC_MCUDIV_MASK GENMASK(3, 0) /* offset between RCC_MP_xxxENSETR and RCC_MP_xxxENCLRR registers */ #define RCC_MP_ENCLRR_OFFSET 4 /* Fields of RCC_BDCR register */ #define RCC_BDCR_LSEON BIT(0) #define RCC_BDCR_LSEBYP BIT(1) #define RCC_BDCR_LSERDY BIT(2) #define RCC_BDCR_LSEDRV_MASK GENMASK(5, 4) #define RCC_BDCR_LSEDRV_SHIFT 4 #define RCC_BDCR_LSECSSON BIT(8) #define RCC_BDCR_RTCCKEN BIT(20) #define RCC_BDCR_RTCSRC_MASK GENMASK(17, 16) #define RCC_BDCR_RTCSRC_SHIFT 16 /* Fields of RCC_RDLSICR register */ #define RCC_RDLSICR_LSION BIT(0) #define RCC_RDLSICR_LSIRDY BIT(1) /* used for ALL PLLNCR registers */ #define RCC_PLLNCR_PLLON BIT(0) #define RCC_PLLNCR_PLLRDY BIT(1) #define RCC_PLLNCR_DIVPEN BIT(4) #define RCC_PLLNCR_DIVQEN BIT(5) #define RCC_PLLNCR_DIVREN BIT(6) #define RCC_PLLNCR_DIVEN_SHIFT 4 /* used for ALL PLLNCFGR1 registers */ #define RCC_PLLNCFGR1_DIVM_SHIFT 16 #define RCC_PLLNCFGR1_DIVM_MASK GENMASK(21, 16) #define RCC_PLLNCFGR1_DIVN_SHIFT 0 #define RCC_PLLNCFGR1_DIVN_MASK GENMASK(8, 0) /* only for PLL3 and PLL4 */ #define RCC_PLLNCFGR1_IFRGE_SHIFT 24 #define RCC_PLLNCFGR1_IFRGE_MASK GENMASK(25, 24) /* used for ALL PLLNCFGR2 registers */ #define RCC_PLLNCFGR2_DIVX_MASK GENMASK(6, 0) #define RCC_PLLNCFGR2_DIVP_SHIFT 0 #define RCC_PLLNCFGR2_DIVP_MASK GENMASK(6, 0) #define RCC_PLLNCFGR2_DIVQ_SHIFT 8 #define RCC_PLLNCFGR2_DIVQ_MASK GENMASK(14, 8) #define RCC_PLLNCFGR2_DIVR_SHIFT 16 #define RCC_PLLNCFGR2_DIVR_MASK GENMASK(22, 16) /* used for ALL PLLNFRACR registers */ #define RCC_PLLNFRACR_FRACV_SHIFT 3 #define RCC_PLLNFRACR_FRACV_MASK GENMASK(15, 3) #define RCC_PLLNFRACR_FRACLE BIT(16) /* used for ALL PLLNCSGR registers */ #define RCC_PLLNCSGR_INC_STEP_SHIFT 16 #define RCC_PLLNCSGR_INC_STEP_MASK GENMASK(30, 16) #define RCC_PLLNCSGR_MOD_PER_SHIFT 0 #define RCC_PLLNCSGR_MOD_PER_MASK GENMASK(12, 0) #define RCC_PLLNCSGR_SSCG_MODE_SHIFT 15 #define RCC_PLLNCSGR_SSCG_MODE_MASK BIT(15) /* used for RCC_OCENSETR and RCC_OCENCLRR registers */ #define RCC_OCENR_HSION BIT(0) #define RCC_OCENR_CSION BIT(4) #define RCC_OCENR_HSEON BIT(8) #define RCC_OCENR_HSEBYP BIT(10) #define RCC_OCENR_HSECSSON BIT(11) /* Fields of RCC_OCRDYR register */ #define RCC_OCRDYR_HSIRDY BIT(0) #define RCC_OCRDYR_HSIDIVRDY BIT(2) #define RCC_OCRDYR_CSIRDY BIT(4) #define RCC_OCRDYR_HSERDY BIT(8) /* Fields of DDRITFCR register */ #define RCC_DDRITFCR_DDRCKMOD_MASK GENMASK(22, 20) #define RCC_DDRITFCR_DDRCKMOD_SHIFT 20 #define RCC_DDRITFCR_DDRCKMOD_SSR 0 /* Fields of RCC_HSICFGR register */ #define RCC_HSICFGR_HSIDIV_MASK GENMASK(1, 0) /* used for MCO related operations */ #define RCC_MCOCFG_MCOON BIT(12) #define RCC_MCOCFG_MCODIV_MASK GENMASK(7, 4) #define RCC_MCOCFG_MCODIV_SHIFT 4 #define RCC_MCOCFG_MCOSRC_MASK GENMASK(2, 0) enum stm32mp1_parent_id { /* * _HSI, _HSE, _CSI, _LSI, _LSE should not be moved * they are used as index in osc[] as entry point */ _HSI, _HSE, _CSI, _LSI, _LSE, _I2S_CKIN, _USB_PHY_48, NB_OSC, /* other parent source */ _HSI_KER = NB_OSC, _HSE_KER, _HSE_KER_DIV2, _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, _PARENT_NB, _UNKNOWN_ID = 0xff, }; enum stm32mp1_parent_sel { _I2C12_SEL, _I2C35_SEL, _I2C46_SEL, _UART6_SEL, _UART24_SEL, _UART35_SEL, _UART78_SEL, _SDMMC12_SEL, _SDMMC3_SEL, _ETH_SEL, _QSPI_SEL, _FMC_SEL, _USBPHY_SEL, _USBO_SEL, _STGEN_SEL, _PARENT_SEL_NB, _UNKNOWN_SEL = 0xff, }; 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 { u8 refclk_min; u8 refclk_max; u8 divn_max; }; struct stm32mp1_clk_gate { u16 offset; u8 bit; u8 index; u8 set_clr; u8 sel; u8 fixed; }; struct stm32mp1_clk_sel { u16 offset; u8 src; u8 msk; u8 nb_parent; const u8 *parent; }; #define REFCLK_SIZE 4 struct stm32mp1_clk_pll { enum stm32mp1_plltype plltype; u16 rckxselr; u16 pllxcfgr1; u16 pllxcfgr2; u16 pllxfracr; u16 pllxcr; u16 pllxcsgr; u8 refclk[REFCLK_SIZE]; }; struct stm32mp1_clk_data { const struct stm32mp1_clk_gate *gate; const struct stm32mp1_clk_sel *sel; const struct stm32mp1_clk_pll *pll; const int nb_gate; }; struct stm32mp1_clk_priv { fdt_addr_t base; const struct stm32mp1_clk_data *data; ulong osc[NB_OSC]; struct udevice *osc_dev[NB_OSC]; }; #define STM32MP1_CLK(off, b, idx, s) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 0, \ .sel = (s), \ .fixed = _UNKNOWN_ID, \ } #define STM32MP1_CLK_F(off, b, idx, f) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 0, \ .sel = _UNKNOWN_SEL, \ .fixed = (f), \ } #define STM32MP1_CLK_SET_CLR(off, b, idx, s) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 1, \ .sel = (s), \ .fixed = _UNKNOWN_ID, \ } #define STM32MP1_CLK_SET_CLR_F(off, b, idx, f) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 1, \ .sel = _UNKNOWN_SEL, \ .fixed = (f), \ } #define STM32MP1_CLK_PARENT(idx, off, s, m, p) \ [(idx)] = { \ .offset = (off), \ .src = (s), \ .msk = (m), \ .parent = (p), \ .nb_parent = ARRAY_SIZE((p)) \ } #define STM32MP1_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), \ } static const u8 stm32mp1_clks[][2] = { {CK_PER, _CK_PER}, {CK_MPU, _CK_MPU}, {CK_AXI, _ACLK}, {CK_MCU, _CK_MCU}, {CK_HSE, _HSE}, {CK_CSI, _CSI}, {CK_LSI, _LSI}, {CK_LSE, _LSE}, {CK_HSI, _HSI}, {CK_HSE_DIV2, _HSE_KER_DIV2}, }; static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = { STM32MP1_CLK(RCC_DDRITFCR, 0, DDRC1, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 1, DDRC1LP, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 2, DDRC2, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 3, DDRC2LP, _UNKNOWN_SEL), STM32MP1_CLK_F(RCC_DDRITFCR, 4, DDRPHYC, _PLL2_R), STM32MP1_CLK(RCC_DDRITFCR, 5, DDRPHYCLP, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 6, DDRCAPB, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 7, DDRCAPBLP, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 8, AXIDCG, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 9, DDRPHYCAPB, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 10, DDRPHYCAPBLP, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 14, USART2_K, _UART24_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 15, USART3_K, _UART35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 16, UART4_K, _UART24_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 17, UART5_K, _UART35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 18, UART7_K, _UART78_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 19, UART8_K, _UART78_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 21, I2C1_K, _I2C12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 22, I2C2_K, _I2C12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 23, I2C3_K, _I2C35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 24, I2C5_K, _I2C35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB2ENSETR, 13, USART6_K, _UART6_SEL), STM32MP1_CLK_SET_CLR_F(RCC_MP_APB3ENSETR, 13, VREF, _PCLK3), STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 8, DDRPERFM, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 15, IWDG2, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 16, USBPHY_K, _USBPHY_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 2, I2C4_K, _I2C46_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 20, STGEN_K, _STGEN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 8, USBO_K, _USBO_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 16, SDMMC3_K, _SDMMC3_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 0, GPIOA, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 1, GPIOB, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 2, GPIOC, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 3, GPIOD, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 4, GPIOE, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 5, GPIOF, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 6, GPIOG, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 7, GPIOH, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 8, GPIOI, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 9, GPIOJ, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 10, GPIOK, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB5ENSETR, 0, GPIOZ, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 7, ETHCK, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 8, ETHTX, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 9, ETHRX, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 10, ETHMAC_K, _ETH_SEL), STM32MP1_CLK_SET_CLR_F(RCC_MP_AHB6ENSETR, 10, ETHMAC, _ACLK), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 12, FMC_K, _FMC_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 14, QSPI_K, _QSPI_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 16, SDMMC1_K, _SDMMC12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 17, SDMMC2_K, _SDMMC12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 24, USBH, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DBGCFGR, 8, CK_DBG, _UNKNOWN_SEL), }; static const u8 i2c12_parents[] = {_PCLK1, _PLL4_R, _HSI_KER, _CSI_KER}; static const u8 i2c35_parents[] = {_PCLK1, _PLL4_R, _HSI_KER, _CSI_KER}; static const u8 i2c46_parents[] = {_PCLK5, _PLL3_Q, _HSI_KER, _CSI_KER}; static const u8 uart6_parents[] = {_PCLK2, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 uart24_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 uart35_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 uart78_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 sdmmc12_parents[] = {_HCLK6, _PLL3_R, _PLL4_P, _HSI_KER}; static const u8 sdmmc3_parents[] = {_HCLK2, _PLL3_R, _PLL4_P, _HSI_KER}; static const u8 eth_parents[] = {_PLL4_P, _PLL3_Q}; static const u8 qspi_parents[] = {_ACLK, _PLL3_R, _PLL4_P, _CK_PER}; static const u8 fmc_parents[] = {_ACLK, _PLL3_R, _PLL4_P, _CK_PER}; static const u8 usbphy_parents[] = {_HSE_KER, _PLL4_R, _HSE_KER_DIV2}; static const u8 usbo_parents[] = {_PLL4_R, _USB_PHY_48}; static const u8 stgen_parents[] = {_HSI_KER, _HSE_KER}; static const struct stm32mp1_clk_sel stm32mp1_clk_sel[_PARENT_SEL_NB] = { STM32MP1_CLK_PARENT(_I2C12_SEL, RCC_I2C12CKSELR, 0, 0x7, i2c12_parents), STM32MP1_CLK_PARENT(_I2C35_SEL, RCC_I2C35CKSELR, 0, 0x7, i2c35_parents), STM32MP1_CLK_PARENT(_I2C46_SEL, RCC_I2C46CKSELR, 0, 0x7, i2c46_parents), STM32MP1_CLK_PARENT(_UART6_SEL, RCC_UART6CKSELR, 0, 0x7, uart6_parents), STM32MP1_CLK_PARENT(_UART24_SEL, RCC_UART24CKSELR, 0, 0x7, uart24_parents), STM32MP1_CLK_PARENT(_UART35_SEL, RCC_UART35CKSELR, 0, 0x7, uart35_parents), STM32MP1_CLK_PARENT(_UART78_SEL, RCC_UART78CKSELR, 0, 0x7, uart78_parents), STM32MP1_CLK_PARENT(_SDMMC12_SEL, RCC_SDMMC12CKSELR, 0, 0x7, sdmmc12_parents), STM32MP1_CLK_PARENT(_SDMMC3_SEL, RCC_SDMMC3CKSELR, 0, 0x7, sdmmc3_parents), STM32MP1_CLK_PARENT(_ETH_SEL, RCC_ETHCKSELR, 0, 0x3, eth_parents), STM32MP1_CLK_PARENT(_QSPI_SEL, RCC_QSPICKSELR, 0, 0xf, qspi_parents), STM32MP1_CLK_PARENT(_FMC_SEL, RCC_FMCCKSELR, 0, 0xf, fmc_parents), STM32MP1_CLK_PARENT(_USBPHY_SEL, RCC_USBCKSELR, 0, 0x3, usbphy_parents), STM32MP1_CLK_PARENT(_USBO_SEL, RCC_USBCKSELR, 4, 0x1, usbo_parents), STM32MP1_CLK_PARENT(_STGEN_SEL, RCC_STGENCKSELR, 0, 0x3, stgen_parents), }; #ifdef STM32MP1_CLOCK_TREE_INIT /* 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, .divn_max = 99, }, [PLL_1600] = { .refclk_min = 8, .refclk_max = 16, .divn_max = 199, }, }; #endif /* STM32MP1_CLOCK_TREE_INIT */ static const struct stm32mp1_clk_pll stm32mp1_clk_pll[_PLL_NB] = { STM32MP1_CLK_PLL(_PLL1, PLL_1600, RCC_RCK12SELR, RCC_PLL1CFGR1, RCC_PLL1CFGR2, RCC_PLL1FRACR, RCC_PLL1CR, RCC_PLL1CSGR, _HSI, _HSE, _UNKNOWN_ID, _UNKNOWN_ID), STM32MP1_CLK_PLL(_PLL2, PLL_1600, RCC_RCK12SELR, RCC_PLL2CFGR1, RCC_PLL2CFGR2, RCC_PLL2FRACR, RCC_PLL2CR, RCC_PLL2CSGR, _HSI, _HSE, _UNKNOWN_ID, _UNKNOWN_ID), STM32MP1_CLK_PLL(_PLL3, PLL_800, RCC_RCK3SELR, RCC_PLL3CFGR1, RCC_PLL3CFGR2, RCC_PLL3FRACR, RCC_PLL3CR, RCC_PLL3CSGR, _HSI, _HSE, _CSI, _UNKNOWN_ID), STM32MP1_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 u8 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 u8 stm32mp1_mpu_apbx_div[8] = { 0, 1, 2, 3, 4, 4, 4, 4 }; /* div = /1 /2 /3 /4 */ static const u8 stm32mp1_axi_div[8] = { 1, 2, 3, 4, 4, 4, 4, 4 }; #ifdef DEBUG static const char * const stm32mp1_clk_parent_name[_PARENT_NB] = { [_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", [_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" }; static const char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = { [_I2C12_SEL] = "I2C12", [_I2C35_SEL] = "I2C35", [_I2C46_SEL] = "I2C46", [_UART6_SEL] = "UART6", [_UART24_SEL] = "UART24", [_UART35_SEL] = "UART35", [_UART78_SEL] = "UART78", [_SDMMC12_SEL] = "SDMMC12", [_SDMMC3_SEL] = "SDMMC3", [_ETH_SEL] = "ETH", [_QSPI_SEL] = "QSPI", [_FMC_SEL] = "FMC", [_USBPHY_SEL] = "USBPHY", [_USBO_SEL] = "USBO", [_STGEN_SEL] = "STGEN" }; #endif static const struct stm32mp1_clk_data stm32mp1_data = { .gate = stm32mp1_clk_gate, .sel = stm32mp1_clk_sel, .pll = stm32mp1_clk_pll, .nb_gate = ARRAY_SIZE(stm32mp1_clk_gate), }; static ulong stm32mp1_clk_get_fixed(struct stm32mp1_clk_priv *priv, int idx) { if (idx >= NB_OSC) { debug("%s: clk id %d not found\n", __func__, idx); return 0; } debug("%s: clk id %d = %x : %ld kHz\n", __func__, idx, (u32)priv->osc[idx], priv->osc[idx] / 1000); return priv->osc[idx]; } static int stm32mp1_clk_get_id(struct stm32mp1_clk_priv *priv, unsigned long id) { const struct stm32mp1_clk_gate *gate = priv->data->gate; int i, nb_clks = priv->data->nb_gate; for (i = 0; i < nb_clks; i++) { if (gate[i].index == id) break; } if (i == nb_clks) { printf("%s: clk id %d not found\n", __func__, (u32)id); return -EINVAL; } return i; } static int stm32mp1_clk_get_sel(struct stm32mp1_clk_priv *priv, int i) { const struct stm32mp1_clk_gate *gate = priv->data->gate; if (gate[i].sel > _PARENT_SEL_NB) { printf("%s: parents for clk id %d not found\n", __func__, i); return -EINVAL; } return gate[i].sel; } static int stm32mp1_clk_get_fixed_parent(struct stm32mp1_clk_priv *priv, int i) { const struct stm32mp1_clk_gate *gate = priv->data->gate; if (gate[i].fixed == _UNKNOWN_ID) return -ENOENT; return gate[i].fixed; } static int stm32mp1_clk_get_parent(struct stm32mp1_clk_priv *priv, unsigned long id) { const struct stm32mp1_clk_sel *sel = priv->data->sel; int i; int s, p; for (i = 0; i < ARRAY_SIZE(stm32mp1_clks); i++) if (stm32mp1_clks[i][0] == id) return stm32mp1_clks[i][1]; i = stm32mp1_clk_get_id(priv, id); if (i < 0) return i; p = stm32mp1_clk_get_fixed_parent(priv, i); if (p >= 0 && p < _PARENT_NB) return p; s = stm32mp1_clk_get_sel(priv, i); if (s < 0) return s; p = (readl(priv->base + sel[s].offset) >> sel[s].src) & sel[s].msk; if (p < sel[s].nb_parent) { #ifdef DEBUG debug("%s: %s clock is the parent %s of clk id %d\n", __func__, stm32mp1_clk_parent_name[sel[s].parent[p]], stm32mp1_clk_parent_sel_name[s], (u32)id); #endif return sel[s].parent[p]; } pr_err("%s: no parents defined for clk id %d\n", __func__, (u32)id); return -EINVAL; } static ulong stm32mp1_read_pll_freq(struct stm32mp1_clk_priv *priv, int pll_id, int div_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; int divm, divn, divy, src; ulong refclk, dfout; u32 selr, cfgr1, cfgr2, fracr; const u8 shift[_DIV_NB] = { [_DIV_P] = RCC_PLLNCFGR2_DIVP_SHIFT, [_DIV_Q] = RCC_PLLNCFGR2_DIVQ_SHIFT, [_DIV_R] = RCC_PLLNCFGR2_DIVR_SHIFT }; debug("%s(%d, %d)\n", __func__, pll_id, div_id); if (div_id > _DIV_NB) return 0; selr = readl(priv->base + pll[pll_id].rckxselr); cfgr1 = readl(priv->base + pll[pll_id].pllxcfgr1); cfgr2 = readl(priv->base + pll[pll_id].pllxcfgr2); fracr = readl(priv->base + pll[pll_id].pllxfracr); debug("PLL%d : selr=%x cfgr1=%x cfgr2=%x fracr=%x\n", pll_id, selr, cfgr1, cfgr2, fracr); divm = (cfgr1 & (RCC_PLLNCFGR1_DIVM_MASK)) >> RCC_PLLNCFGR1_DIVM_SHIFT; divn = cfgr1 & RCC_PLLNCFGR1_DIVN_MASK; divy = (cfgr2 >> shift[div_id]) & RCC_PLLNCFGR2_DIVX_MASK; debug(" DIVN=%d DIVM=%d DIVY=%d\n", divn, divm, divy); src = selr & RCC_SELR_SRC_MASK; refclk = stm32mp1_clk_get_fixed(priv, pll[pll_id].refclk[src]); debug(" refclk = %d kHz\n", (u32)(refclk / 1000)); /* * For: PLL1 & PLL2 => VCO is * 2 but ck_pll_y is also / 2 * So same final result than PLL2 et 4 * with FRACV : * Fck_pll_y = Fck_ref * ((DIVN + 1) + FRACV / 2^13) * / (DIVM + 1) * (DIVy + 1) * without FRACV * Fck_pll_y = Fck_ref * ((DIVN + 1) / (DIVM + 1) *(DIVy + 1) */ if (fracr & RCC_PLLNFRACR_FRACLE) { u32 fracv = (fracr & RCC_PLLNFRACR_FRACV_MASK) >> RCC_PLLNFRACR_FRACV_SHIFT; dfout = (ulong)lldiv((unsigned long long)refclk * (((divn + 1) << 13) + fracv), ((unsigned long long)(divm + 1) * (divy + 1)) << 13); } else { dfout = (ulong)(refclk * (divn + 1) / (divm + 1) * (divy + 1)); } debug(" => dfout = %d kHz\n", (u32)(dfout / 1000)); return dfout; } static ulong stm32mp1_clk_get(struct stm32mp1_clk_priv *priv, int p) { u32 reg; ulong clock = 0; switch (p) { case _CK_MPU: /* MPU sub system */ reg = readl(priv->base + RCC_MPCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_MPCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_MPCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_MPCKSELR_PLL: case RCC_MPCKSELR_PLL_MPUDIV: clock = stm32mp1_read_pll_freq(priv, _PLL1, _DIV_P); if (p == RCC_MPCKSELR_PLL_MPUDIV) { reg = readl(priv->base + RCC_MPCKDIVR); clock /= stm32mp1_mpu_div[reg & RCC_MPUDIV_MASK]; } break; } break; /* AXI sub system */ case _ACLK: case _HCLK2: case _HCLK6: case _PCLK4: case _PCLK5: reg = readl(priv->base + RCC_ASSCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_ASSCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_ASSCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_ASSCKSELR_PLL: clock = stm32mp1_read_pll_freq(priv, _PLL2, _DIV_P); break; } /* System clock divider */ reg = readl(priv->base + RCC_AXIDIVR); clock /= stm32mp1_axi_div[reg & RCC_AXIDIV_MASK]; switch (p) { case _PCLK4: reg = readl(priv->base + RCC_APB4DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _PCLK5: reg = readl(priv->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 = readl(priv->base + RCC_MSSCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_MSSCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_MSSCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_MSSCKSELR_CSI: clock = stm32mp1_clk_get_fixed(priv, _CSI); break; case RCC_MSSCKSELR_PLL: clock = stm32mp1_read_pll_freq(priv, _PLL3, _DIV_P); break; } /* MCU clock divider */ reg = readl(priv->base + RCC_MCUDIVR); clock >>= stm32mp1_mcu_div[reg & RCC_MCUDIV_MASK]; switch (p) { case _PCLK1: reg = readl(priv->base + RCC_APB1DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _PCLK2: reg = readl(priv->base + RCC_APB2DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _PCLK3: reg = readl(priv->base + RCC_APB3DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _CK_MCU: default: break; } break; case _CK_PER: reg = readl(priv->base + RCC_CPERCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_CPERCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_CPERCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_CPERCKSELR_CSI: clock = stm32mp1_clk_get_fixed(priv, _CSI); break; } break; case _HSI: case _HSI_KER: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case _CSI: case _CSI_KER: clock = stm32mp1_clk_get_fixed(priv, _CSI); break; case _HSE: case _HSE_KER: case _HSE_KER_DIV2: clock = stm32mp1_clk_get_fixed(priv, _HSE); if (p == _HSE_KER_DIV2) clock >>= 1; break; case _LSI: clock = stm32mp1_clk_get_fixed(priv, _LSI); break; case _LSE: clock = stm32mp1_clk_get_fixed(priv, _LSE); break; /* PLL */ case _PLL1_P: case _PLL1_Q: case _PLL1_R: clock = stm32mp1_read_pll_freq(priv, _PLL1, p - _PLL1_P); break; case _PLL2_P: case _PLL2_Q: case _PLL2_R: clock = stm32mp1_read_pll_freq(priv, _PLL2, p - _PLL2_P); break; case _PLL3_P: case _PLL3_Q: case _PLL3_R: clock = stm32mp1_read_pll_freq(priv, _PLL3, p - _PLL3_P); break; case _PLL4_P: case _PLL4_Q: case _PLL4_R: clock = stm32mp1_read_pll_freq(priv, _PLL4, p - _PLL4_P); break; /* other */ case _USB_PHY_48: clock = stm32mp1_clk_get_fixed(priv, _USB_PHY_48); break; default: break; } debug("%s(%d) clock = %lx : %ld kHz\n", __func__, p, clock, clock / 1000); return clock; } static int stm32mp1_clk_enable(struct clk *clk) { struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); const struct stm32mp1_clk_gate *gate = priv->data->gate; int i = stm32mp1_clk_get_id(priv, clk->id); if (i < 0) return i; if (gate[i].set_clr) writel(BIT(gate[i].bit), priv->base + gate[i].offset); else setbits_le32(priv->base + gate[i].offset, BIT(gate[i].bit)); debug("%s: id clock %d has been enabled\n", __func__, (u32)clk->id); return 0; } static int stm32mp1_clk_disable(struct clk *clk) { struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); const struct stm32mp1_clk_gate *gate = priv->data->gate; int i = stm32mp1_clk_get_id(priv, clk->id); if (i < 0) return i; if (gate[i].set_clr) writel(BIT(gate[i].bit), priv->base + gate[i].offset + RCC_MP_ENCLRR_OFFSET); else clrbits_le32(priv->base + gate[i].offset, BIT(gate[i].bit)); debug("%s: id clock %d has been disabled\n", __func__, (u32)clk->id); return 0; } static ulong stm32mp1_clk_get_rate(struct clk *clk) { struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); int p = stm32mp1_clk_get_parent(priv, clk->id); ulong rate; if (p < 0) return 0; rate = stm32mp1_clk_get(priv, p); #ifdef DEBUG debug("%s: computed rate for id clock %d is %d (parent is %s)\n", __func__, (u32)clk->id, (u32)rate, stm32mp1_clk_parent_name[p]); #endif return rate; } #ifdef STM32MP1_CLOCK_TREE_INIT static void stm32mp1_ls_osc_set(int enable, fdt_addr_t rcc, u32 offset, u32 mask_on) { u32 address = rcc + offset; if (enable) setbits_le32(address, mask_on); else clrbits_le32(address, mask_on); } static void stm32mp1_hs_ocs_set(int enable, fdt_addr_t rcc, u32 mask_on) { if (enable) setbits_le32(rcc + RCC_OCENSETR, mask_on); else setbits_le32(rcc + RCC_OCENCLRR, mask_on); } static int stm32mp1_osc_wait(int enable, fdt_addr_t rcc, u32 offset, u32 mask_rdy) { u32 mask_test = 0; u32 address = rcc + offset; u32 val; int ret; if (enable) mask_test = mask_rdy; ret = readl_poll_timeout(address, val, (val & mask_rdy) == mask_test, TIMEOUT_1S); if (ret) pr_err("OSC %x @ %x timeout for enable=%d : 0x%x\n", mask_rdy, address, enable, readl(address)); return ret; } static void stm32mp1_lse_enable(fdt_addr_t rcc, int bypass, int lsedrv) { u32 value; if (bypass) setbits_le32(rcc + RCC_BDCR, RCC_BDCR_LSEBYP); /* * warning: not recommended to switch directly from "high drive" * to "medium low drive", and vice-versa. */ value = (readl(rcc + RCC_BDCR) & RCC_BDCR_LSEDRV_MASK) >> RCC_BDCR_LSEDRV_SHIFT; while (value != lsedrv) { if (value > lsedrv) value--; else value++; clrsetbits_le32(rcc + RCC_BDCR, RCC_BDCR_LSEDRV_MASK, value << RCC_BDCR_LSEDRV_SHIFT); } stm32mp1_ls_osc_set(1, rcc, RCC_BDCR, RCC_BDCR_LSEON); } static void stm32mp1_lse_wait(fdt_addr_t rcc) { stm32mp1_osc_wait(1, rcc, RCC_BDCR, RCC_BDCR_LSERDY); } static void stm32mp1_lsi_set(fdt_addr_t rcc, int enable) { stm32mp1_ls_osc_set(enable, rcc, RCC_RDLSICR, RCC_RDLSICR_LSION); stm32mp1_osc_wait(enable, rcc, RCC_RDLSICR, RCC_RDLSICR_LSIRDY); } static void stm32mp1_hse_enable(fdt_addr_t rcc, int bypass, int css) { if (bypass) setbits_le32(rcc + RCC_OCENSETR, RCC_OCENR_HSEBYP); stm32mp1_hs_ocs_set(1, rcc, RCC_OCENR_HSEON); stm32mp1_osc_wait(1, rcc, RCC_OCRDYR, RCC_OCRDYR_HSERDY); if (css) setbits_le32(rcc + RCC_OCENSETR, RCC_OCENR_HSECSSON); } static void stm32mp1_csi_set(fdt_addr_t rcc, int enable) { stm32mp1_ls_osc_set(enable, rcc, RCC_OCENSETR, RCC_OCENR_CSION); stm32mp1_osc_wait(enable, rcc, RCC_OCRDYR, RCC_OCRDYR_CSIRDY); } static void stm32mp1_hsi_set(fdt_addr_t rcc, int enable) { stm32mp1_hs_ocs_set(enable, rcc, RCC_OCENR_HSION); stm32mp1_osc_wait(enable, rcc, RCC_OCRDYR, RCC_OCRDYR_HSIRDY); } static int stm32mp1_set_hsidiv(fdt_addr_t rcc, u8 hsidiv) { u32 address = rcc + RCC_OCRDYR; u32 val; int ret; clrsetbits_le32(rcc + RCC_HSICFGR, RCC_HSICFGR_HSIDIV_MASK, RCC_HSICFGR_HSIDIV_MASK & hsidiv); ret = readl_poll_timeout(address, val, val & RCC_OCRDYR_HSIDIVRDY, TIMEOUT_200MS); if (ret) pr_err("HSIDIV failed @ 0x%x: 0x%x\n", address, readl(address)); return ret; } static int stm32mp1_hsidiv(fdt_addr_t rcc, ulong hsifreq) { u8 hsidiv; u32 hsidivfreq = MAX_HSI_HZ; for (hsidiv = 0; hsidiv < 4; hsidiv++, hsidivfreq = hsidivfreq / 2) if (hsidivfreq == hsifreq) break; if (hsidiv == 4) { pr_err("clk-hsi frequency invalid"); return -1; } if (hsidiv > 0) return stm32mp1_set_hsidiv(rcc, hsidiv); return 0; } static void pll_start(struct stm32mp1_clk_priv *priv, int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; writel(RCC_PLLNCR_PLLON, priv->base + pll[pll_id].pllxcr); } static int pll_output(struct stm32mp1_clk_priv *priv, int pll_id, int output) { const struct stm32mp1_clk_pll *pll = priv->data->pll; u32 pllxcr = priv->base + pll[pll_id].pllxcr; u32 val; int ret; ret = readl_poll_timeout(pllxcr, val, val & RCC_PLLNCR_PLLRDY, TIMEOUT_200MS); if (ret) { pr_err("PLL%d start failed @ 0x%x: 0x%x\n", pll_id, pllxcr, readl(pllxcr)); return ret; } /* start the requested output */ setbits_le32(pllxcr, output << RCC_PLLNCR_DIVEN_SHIFT); return 0; } static int pll_stop(struct stm32mp1_clk_priv *priv, int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; u32 pllxcr = priv->base + pll[pll_id].pllxcr; u32 val; /* stop all output */ clrbits_le32(pllxcr, RCC_PLLNCR_DIVPEN | RCC_PLLNCR_DIVQEN | RCC_PLLNCR_DIVREN); /* stop PLL */ clrbits_le32(pllxcr, RCC_PLLNCR_PLLON); /* wait PLL stopped */ return readl_poll_timeout(pllxcr, val, (val & RCC_PLLNCR_PLLRDY) == 0, TIMEOUT_200MS); } static void pll_config_output(struct stm32mp1_clk_priv *priv, int pll_id, u32 *pllcfg) { const struct stm32mp1_clk_pll *pll = priv->data->pll; fdt_addr_t rcc = priv->base; u32 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; writel(value, rcc + pll[pll_id].pllxcfgr2); } static int pll_config(struct stm32mp1_clk_priv *priv, int pll_id, u32 *pllcfg, u32 fracv) { const struct stm32mp1_clk_pll *pll = priv->data->pll; fdt_addr_t rcc = priv->base; enum stm32mp1_plltype type = pll[pll_id].plltype; int src; ulong refclk; u8 ifrge = 0; u32 value; src = readl(priv->base + pll[pll_id].rckxselr) & RCC_SELR_SRC_MASK; refclk = stm32mp1_clk_get_fixed(priv, pll[pll_id].refclk[src]) / (pllcfg[PLLCFG_M] + 1); if (refclk < (stm32mp1_pll[type].refclk_min * 1000000) || refclk > (stm32mp1_pll[type].refclk_max * 1000000)) { debug("invalid refclk = %x\n", (u32)refclk); return -EINVAL; } if (type == PLL_800 && refclk >= 8000000) ifrge = 1; 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; writel(value, rcc + pll[pll_id].pllxcfgr1); /* fractional configuration: load sigma-delta modulator (SDM) */ /* Write into FRACV the new fractional value , and FRACLE to 0 */ writel(fracv << RCC_PLLNFRACR_FRACV_SHIFT, rcc + pll[pll_id].pllxfracr); /* Write FRACLE to 1 : FRACV value is loaded into the SDM */ setbits_le32(rcc + pll[pll_id].pllxfracr, RCC_PLLNFRACR_FRACLE); pll_config_output(priv, pll_id, pllcfg); return 0; } static void pll_csg(struct stm32mp1_clk_priv *priv, int pll_id, u32 *csg) { const struct stm32mp1_clk_pll *pll = priv->data->pll; u32 pllxcsg; pllxcsg = ((csg[PLLCSG_MOD_PER] << RCC_PLLNCSGR_MOD_PER_SHIFT) & RCC_PLLNCSGR_MOD_PER_MASK) | ((csg[PLLCSG_INC_STEP] << RCC_PLLNCSGR_INC_STEP_SHIFT) & RCC_PLLNCSGR_INC_STEP_MASK) | ((csg[PLLCSG_SSCG_MODE] << RCC_PLLNCSGR_SSCG_MODE_SHIFT) & RCC_PLLNCSGR_SSCG_MODE_MASK); writel(pllxcsg, priv->base + pll[pll_id].pllxcsgr); } static int set_clksrc(struct stm32mp1_clk_priv *priv, unsigned int clksrc) { u32 address = priv->base + (clksrc >> 4); u32 val; int ret; clrsetbits_le32(address, RCC_SELR_SRC_MASK, clksrc & RCC_SELR_SRC_MASK); ret = readl_poll_timeout(address, val, val & RCC_SELR_SRCRDY, TIMEOUT_200MS); if (ret) pr_err("CLKSRC %x start failed @ 0x%x: 0x%x\n", clksrc, address, readl(address)); return ret; } static void stgen_config(struct stm32mp1_clk_priv *priv) { int p; u32 stgenc, cntfid0; ulong rate; stgenc = (u32)syscon_get_first_range(STM32MP_SYSCON_STGEN); cntfid0 = readl(stgenc + STGENC_CNTFID0); p = stm32mp1_clk_get_parent(priv, STGEN_K); rate = stm32mp1_clk_get(priv, p); if (cntfid0 != rate) { pr_debug("System Generic Counter (STGEN) update\n"); clrbits_le32(stgenc + STGENC_CNTCR, STGENC_CNTCR_EN); writel(0x0, stgenc + STGENC_CNTCVL); writel(0x0, stgenc + STGENC_CNTCVU); writel(rate, stgenc + STGENC_CNTFID0); setbits_le32(stgenc + STGENC_CNTCR, STGENC_CNTCR_EN); __asm__ volatile("mcr p15, 0, %0, c14, c0, 0" : : "r" (rate)); /* need to update gd->arch.timer_rate_hz with new frequency */ timer_init(); pr_debug("gd->arch.timer_rate_hz = %x\n", (u32)gd->arch.timer_rate_hz); pr_debug("Tick = %x\n", (u32)(get_ticks())); } } static int set_clkdiv(unsigned int clkdiv, u32 address) { u32 val; int ret; clrsetbits_le32(address, RCC_DIVR_DIV_MASK, clkdiv & RCC_DIVR_DIV_MASK); ret = readl_poll_timeout(address, val, val & RCC_DIVR_DIVRDY, TIMEOUT_200MS); if (ret) pr_err("CLKDIV %x start failed @ 0x%x: 0x%x\n", clkdiv, address, readl(address)); return ret; } static void stm32mp1_mco_csg(struct stm32mp1_clk_priv *priv, u32 clksrc, u32 clkdiv) { u32 address = priv->base + (clksrc >> 4); /* * binding clksrc : bit15-4 offset * bit3: disable * bit2-0: MCOSEL[2:0] */ if (clksrc & 0x8) { clrbits_le32(address, RCC_MCOCFG_MCOON); } else { clrsetbits_le32(address, RCC_MCOCFG_MCOSRC_MASK, clksrc & RCC_MCOCFG_MCOSRC_MASK); clrsetbits_le32(address, RCC_MCOCFG_MCODIV_MASK, clkdiv << RCC_MCOCFG_MCODIV_SHIFT); setbits_le32(address, RCC_MCOCFG_MCOON); } } static void set_rtcsrc(struct stm32mp1_clk_priv *priv, unsigned int clksrc, int lse_css) { u32 address = priv->base + RCC_BDCR; if (readl(address) & RCC_BDCR_RTCCKEN) goto skip_rtc; if (clksrc == CLK_RTC_DISABLED) goto skip_rtc; clrsetbits_le32(address, RCC_BDCR_RTCSRC_MASK, clksrc << RCC_BDCR_RTCSRC_SHIFT); setbits_le32(address, RCC_BDCR_RTCCKEN); skip_rtc: if (lse_css) setbits_le32(address, RCC_BDCR_LSECSSON); } static void pkcs_config(struct stm32mp1_clk_priv *priv, u32 pkcs) { u32 address = priv->base + ((pkcs >> 4) & 0xFFF); u32 value = pkcs & 0xF; u32 mask = 0xF; if (pkcs & BIT(31)) { mask <<= 4; value <<= 4; } clrsetbits_le32(address, mask, value); } static int stm32mp1_clktree(struct udevice *dev) { struct stm32mp1_clk_priv *priv = dev_get_priv(dev); fdt_addr_t rcc = priv->base; unsigned int clksrc[CLKSRC_NB]; unsigned int clkdiv[CLKDIV_NB]; unsigned int pllcfg[_PLL_NB][PLLCFG_NB]; ofnode plloff[_PLL_NB]; int ret; int i, len; int lse_css = 0; const u32 *pkcs_cell; /* check mandatory field */ ret = dev_read_u32_array(dev, "st,clksrc", clksrc, CLKSRC_NB); if (ret < 0) { debug("field st,clksrc invalid: error %d\n", ret); return -FDT_ERR_NOTFOUND; } ret = dev_read_u32_array(dev, "st,clkdiv", clkdiv, CLKDIV_NB); if (ret < 0) { debug("field st,clkdiv invalid: error %d\n", ret); return -FDT_ERR_NOTFOUND; } /* check mandatory field in each pll */ for (i = 0; i < _PLL_NB; i++) { char name[12]; sprintf(name, "st,pll@%d", i); plloff[i] = dev_read_subnode(dev, name); if (!ofnode_valid(plloff[i])) continue; ret = ofnode_read_u32_array(plloff[i], "cfg", pllcfg[i], PLLCFG_NB); if (ret < 0) { debug("field cfg invalid: error %d\n", ret); return -FDT_ERR_NOTFOUND; } } debug("configuration MCO\n"); stm32mp1_mco_csg(priv, clksrc[CLKSRC_MCO1], clkdiv[CLKDIV_MCO1]); stm32mp1_mco_csg(priv, clksrc[CLKSRC_MCO2], clkdiv[CLKDIV_MCO2]); debug("switch ON osillator\n"); /* * switch ON oscillator found in device-tree, * HSI already ON after bootrom */ if (priv->osc[_LSI]) stm32mp1_lsi_set(rcc, 1); if (priv->osc[_LSE]) { int bypass; int lsedrv; struct udevice *dev = priv->osc_dev[_LSE]; bypass = dev_read_bool(dev, "st,bypass"); lse_css = dev_read_bool(dev, "st,css"); lsedrv = dev_read_u32_default(dev, "st,drive", LSEDRV_MEDIUM_HIGH); stm32mp1_lse_enable(rcc, bypass, lsedrv); } if (priv->osc[_HSE]) { int bypass, css; struct udevice *dev = priv->osc_dev[_HSE]; bypass = dev_read_bool(dev, "st,bypass"); css = dev_read_bool(dev, "st,css"); stm32mp1_hse_enable(rcc, bypass, 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(rcc, 1); /* come back to HSI */ debug("come back to HSI\n"); set_clksrc(priv, CLK_MPU_HSI); set_clksrc(priv, CLK_AXI_HSI); set_clksrc(priv, CLK_MCU_HSI); debug("pll stop\n"); for (i = 0; i < _PLL_NB; i++) pll_stop(priv, i); /* configure HSIDIV */ debug("configure HSIDIV\n"); if (priv->osc[_HSI]) { stm32mp1_hsidiv(rcc, priv->osc[_HSI]); stgen_config(priv); } /* select DIV */ debug("select DIV\n"); /* no ready bit when MPUSRC != CLK_MPU_PLL1P_DIV, MPUDIV is disabled */ writel(clkdiv[CLKDIV_MPU] & RCC_DIVR_DIV_MASK, rcc + RCC_MPCKDIVR); set_clkdiv(clkdiv[CLKDIV_AXI], rcc + RCC_AXIDIVR); set_clkdiv(clkdiv[CLKDIV_APB4], rcc + RCC_APB4DIVR); set_clkdiv(clkdiv[CLKDIV_APB5], rcc + RCC_APB5DIVR); set_clkdiv(clkdiv[CLKDIV_MCU], rcc + RCC_MCUDIVR); set_clkdiv(clkdiv[CLKDIV_APB1], rcc + RCC_APB1DIVR); set_clkdiv(clkdiv[CLKDIV_APB2], rcc + RCC_APB2DIVR); set_clkdiv(clkdiv[CLKDIV_APB3], rcc + RCC_APB3DIVR); /* no ready bit for RTC */ writel(clkdiv[CLKDIV_RTC] & RCC_DIVR_DIV_MASK, rcc + RCC_RTCDIVR); /* configure PLLs source */ debug("configure PLLs source\n"); set_clksrc(priv, clksrc[CLKSRC_PLL12]); set_clksrc(priv, clksrc[CLKSRC_PLL3]); set_clksrc(priv, clksrc[CLKSRC_PLL4]); /* configure and start PLLs */ debug("configure PLLs\n"); for (i = 0; i < _PLL_NB; i++) { u32 fracv; u32 csg[PLLCSG_NB]; debug("configure PLL %d @ %d\n", i, ofnode_to_offset(plloff[i])); if (!ofnode_valid(plloff[i])) continue; fracv = ofnode_read_u32_default(plloff[i], "frac", 0); pll_config(priv, i, pllcfg[i], fracv); ret = ofnode_read_u32_array(plloff[i], "csg", csg, PLLCSG_NB); if (!ret) { pll_csg(priv, i, csg); } else if (ret != -FDT_ERR_NOTFOUND) { debug("invalid csg node for pll@%d res=%d\n", i, ret); return ret; } pll_start(priv, i); } /* wait and start PLLs ouptut when ready */ for (i = 0; i < _PLL_NB; i++) { if (!ofnode_valid(plloff[i])) continue; debug("output PLL %d\n", i); pll_output(priv, i, pllcfg[i][PLLCFG_O]); } /* wait LSE ready before to use it */ if (priv->osc[_LSE]) stm32mp1_lse_wait(rcc); /* configure with expected clock source */ debug("CLKSRC\n"); set_clksrc(priv, clksrc[CLKSRC_MPU]); set_clksrc(priv, clksrc[CLKSRC_AXI]); set_clksrc(priv, clksrc[CLKSRC_MCU]); set_rtcsrc(priv, clksrc[CLKSRC_RTC], lse_css); /* configure PKCK */ debug("PKCK\n"); pkcs_cell = dev_read_prop(dev, "st,pkcs", &len); if (pkcs_cell) { bool ckper_disabled = false; for (i = 0; i < len / sizeof(u32); i++) { u32 pkcs = (u32)fdt32_to_cpu(pkcs_cell[i]); if (pkcs == CLK_CKPER_DISABLED) { ckper_disabled = true; continue; } pkcs_config(priv, pkcs); } /* CKPER is source for some peripheral clock * (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) pkcs_config(priv, CLK_CKPER_DISABLED); } /* STGEN clock source can change with CLK_STGEN_XXX */ stgen_config(priv); debug("oscillator off\n"); /* switch OFF HSI if not found in device-tree */ if (!priv->osc[_HSI]) stm32mp1_hsi_set(rcc, 0); /* Software Self-Refresh mode (SSR) during DDR initilialization */ clrsetbits_le32(priv->base + RCC_DDRITFCR, RCC_DDRITFCR_DDRCKMOD_MASK, RCC_DDRITFCR_DDRCKMOD_SSR << RCC_DDRITFCR_DDRCKMOD_SHIFT); return 0; } #endif /* STM32MP1_CLOCK_TREE_INIT */ static void stm32mp1_osc_clk_init(const char *name, struct stm32mp1_clk_priv *priv, int index) { struct clk clk; struct udevice *dev = NULL; priv->osc[index] = 0; clk.id = 0; if (!uclass_get_device_by_name(UCLASS_CLK, name, &dev)) { if (clk_request(dev, &clk)) pr_err("%s request", name); else priv->osc[index] = clk_get_rate(&clk); } priv->osc_dev[index] = dev; } static void stm32mp1_osc_init(struct udevice *dev) { struct stm32mp1_clk_priv *priv = dev_get_priv(dev); int i; const char *name[NB_OSC] = { [_LSI] = "clk-lsi", [_LSE] = "clk-lse", [_HSI] = "clk-hsi", [_HSE] = "clk-hse", [_CSI] = "clk-csi", [_I2S_CKIN] = "i2s_ckin", [_USB_PHY_48] = "ck_usbo_48m"}; for (i = 0; i < NB_OSC; i++) { stm32mp1_osc_clk_init(name[i], priv, i); debug("%d: %s => %x\n", i, name[i], (u32)priv->osc[i]); } } static int stm32mp1_clk_probe(struct udevice *dev) { int result = 0; struct stm32mp1_clk_priv *priv = dev_get_priv(dev); priv->base = dev_read_addr(dev->parent); if (priv->base == FDT_ADDR_T_NONE) return -EINVAL; priv->data = (void *)&stm32mp1_data; if (!priv->data->gate || !priv->data->sel || !priv->data->pll) return -EINVAL; stm32mp1_osc_init(dev); #ifdef STM32MP1_CLOCK_TREE_INIT /* clock tree init is done only one time, before relocation */ if (!(gd->flags & GD_FLG_RELOC)) result = stm32mp1_clktree(dev); #endif return result; } static const struct clk_ops stm32mp1_clk_ops = { .enable = stm32mp1_clk_enable, .disable = stm32mp1_clk_disable, .get_rate = stm32mp1_clk_get_rate, }; U_BOOT_DRIVER(stm32mp1_clock) = { .name = "stm32mp1_clk", .id = UCLASS_CLK, .ops = &stm32mp1_clk_ops, .priv_auto_alloc_size = sizeof(struct stm32mp1_clk_priv), .probe = stm32mp1_clk_probe, };