diff options
Diffstat (limited to 'drivers/clk/clk_stm32mp1.c')
| -rw-r--r-- | drivers/clk/clk_stm32mp1.c | 1777 |
1 files changed, 1777 insertions, 0 deletions
diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c new file mode 100644 index 00000000000..c67aa444735 --- /dev/null +++ b/drivers/clk/clk_stm32mp1.c @@ -0,0 +1,1777 @@ +/* + * Copyright (C) 2018, STMicroelectronics - All Rights Reserved + * + * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause + */ + +#include <common.h> +#include <clk-uclass.h> +#include <div64.h> +#include <dm.h> +#include <regmap.h> +#include <spl.h> +#include <syscon.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <dt-bindings/clock/stm32mp1-clks.h> +#include <dt-bindings/clock/stm32mp1-clksrc.h> + +#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_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(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, +}; + +static const struct udevice_id stm32mp1_clk_ids[] = { + { .compatible = "st,stm32mp1-rcc-clk" }, + { } +}; + +U_BOOT_DRIVER(stm32mp1_clock) = { + .name = "stm32mp1_clk", + .id = UCLASS_CLK, + .of_match = stm32mp1_clk_ids, + .ops = &stm32mp1_clk_ops, + .priv_auto_alloc_size = sizeof(struct stm32mp1_clk_priv), + .probe = stm32mp1_clk_probe, +}; |