diff options
Diffstat (limited to 'drivers/clk/sifive/sifive-prci.h')
| -rw-r--r-- | drivers/clk/sifive/sifive-prci.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/drivers/clk/sifive/sifive-prci.h b/drivers/clk/sifive/sifive-prci.h new file mode 100644 index 000000000000..280df63b4b92 --- /dev/null +++ b/drivers/clk/sifive/sifive-prci.h @@ -0,0 +1,201 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018-2019 SiFive, Inc. + * Wesley Terpstra + * Paul Walmsley + * Zong Li + */ + +#ifndef __SIFIVE_CLK_SIFIVE_PRCI_H +#define __SIFIVE_CLK_SIFIVE_PRCI_H + +#include <linux/clk/analogbits-wrpll-cln28hpc.h> +#include <linux/clk-provider.h> +#include <linux/platform_device.h> + +/* + * EXPECTED_CLK_PARENT_COUNT: how many parent clocks this driver expects: + * hfclk and rtcclk + */ +#define EXPECTED_CLK_PARENT_COUNT 2 + +/* + * Register offsets and bitmasks + */ + +/* COREPLLCFG0 */ +#define PRCI_COREPLLCFG0_OFFSET 0x4 +#define PRCI_COREPLLCFG0_DIVR_SHIFT 0 +#define PRCI_COREPLLCFG0_DIVR_MASK (0x3f << PRCI_COREPLLCFG0_DIVR_SHIFT) +#define PRCI_COREPLLCFG0_DIVF_SHIFT 6 +#define PRCI_COREPLLCFG0_DIVF_MASK (0x1ff << PRCI_COREPLLCFG0_DIVF_SHIFT) +#define PRCI_COREPLLCFG0_DIVQ_SHIFT 15 +#define PRCI_COREPLLCFG0_DIVQ_MASK (0x7 << PRCI_COREPLLCFG0_DIVQ_SHIFT) +#define PRCI_COREPLLCFG0_RANGE_SHIFT 18 +#define PRCI_COREPLLCFG0_RANGE_MASK (0x7 << PRCI_COREPLLCFG0_RANGE_SHIFT) +#define PRCI_COREPLLCFG0_BYPASS_SHIFT 24 +#define PRCI_COREPLLCFG0_BYPASS_MASK (0x1 << PRCI_COREPLLCFG0_BYPASS_SHIFT) +#define PRCI_COREPLLCFG0_FSE_SHIFT 25 +#define PRCI_COREPLLCFG0_FSE_MASK (0x1 << PRCI_COREPLLCFG0_FSE_SHIFT) +#define PRCI_COREPLLCFG0_LOCK_SHIFT 31 +#define PRCI_COREPLLCFG0_LOCK_MASK (0x1 << PRCI_COREPLLCFG0_LOCK_SHIFT) + +/* DDRPLLCFG0 */ +#define PRCI_DDRPLLCFG0_OFFSET 0xc +#define PRCI_DDRPLLCFG0_DIVR_SHIFT 0 +#define PRCI_DDRPLLCFG0_DIVR_MASK (0x3f << PRCI_DDRPLLCFG0_DIVR_SHIFT) +#define PRCI_DDRPLLCFG0_DIVF_SHIFT 6 +#define PRCI_DDRPLLCFG0_DIVF_MASK (0x1ff << PRCI_DDRPLLCFG0_DIVF_SHIFT) +#define PRCI_DDRPLLCFG0_DIVQ_SHIFT 15 +#define PRCI_DDRPLLCFG0_DIVQ_MASK (0x7 << PRCI_DDRPLLCFG0_DIVQ_SHIFT) +#define PRCI_DDRPLLCFG0_RANGE_SHIFT 18 +#define PRCI_DDRPLLCFG0_RANGE_MASK (0x7 << PRCI_DDRPLLCFG0_RANGE_SHIFT) +#define PRCI_DDRPLLCFG0_BYPASS_SHIFT 24 +#define PRCI_DDRPLLCFG0_BYPASS_MASK (0x1 << PRCI_DDRPLLCFG0_BYPASS_SHIFT) +#define PRCI_DDRPLLCFG0_FSE_SHIFT 25 +#define PRCI_DDRPLLCFG0_FSE_MASK (0x1 << PRCI_DDRPLLCFG0_FSE_SHIFT) +#define PRCI_DDRPLLCFG0_LOCK_SHIFT 31 +#define PRCI_DDRPLLCFG0_LOCK_MASK (0x1 << PRCI_DDRPLLCFG0_LOCK_SHIFT) + +/* DDRPLLCFG1 */ +#define PRCI_DDRPLLCFG1_OFFSET 0x10 +#define PRCI_DDRPLLCFG1_CKE_SHIFT 24 +#define PRCI_DDRPLLCFG1_CKE_MASK (0x1 << PRCI_DDRPLLCFG1_CKE_SHIFT) + +/* GEMGXLPLLCFG0 */ +#define PRCI_GEMGXLPLLCFG0_OFFSET 0x1c +#define PRCI_GEMGXLPLLCFG0_DIVR_SHIFT 0 +#define PRCI_GEMGXLPLLCFG0_DIVR_MASK (0x3f << PRCI_GEMGXLPLLCFG0_DIVR_SHIFT) +#define PRCI_GEMGXLPLLCFG0_DIVF_SHIFT 6 +#define PRCI_GEMGXLPLLCFG0_DIVF_MASK (0x1ff << PRCI_GEMGXLPLLCFG0_DIVF_SHIFT) +#define PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT 15 +#define PRCI_GEMGXLPLLCFG0_DIVQ_MASK (0x7 << PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT) +#define PRCI_GEMGXLPLLCFG0_RANGE_SHIFT 18 +#define PRCI_GEMGXLPLLCFG0_RANGE_MASK (0x7 << PRCI_GEMGXLPLLCFG0_RANGE_SHIFT) +#define PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT 24 +#define PRCI_GEMGXLPLLCFG0_BYPASS_MASK (0x1 << PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT) +#define PRCI_GEMGXLPLLCFG0_FSE_SHIFT 25 +#define PRCI_GEMGXLPLLCFG0_FSE_MASK (0x1 << PRCI_GEMGXLPLLCFG0_FSE_SHIFT) +#define PRCI_GEMGXLPLLCFG0_LOCK_SHIFT 31 +#define PRCI_GEMGXLPLLCFG0_LOCK_MASK (0x1 << PRCI_GEMGXLPLLCFG0_LOCK_SHIFT) + +/* GEMGXLPLLCFG1 */ +#define PRCI_GEMGXLPLLCFG1_OFFSET 0x20 +#define PRCI_GEMGXLPLLCFG1_CKE_SHIFT 24 +#define PRCI_GEMGXLPLLCFG1_CKE_MASK (0x1 << PRCI_GEMGXLPLLCFG1_CKE_SHIFT) + +/* CORECLKSEL */ +#define PRCI_CORECLKSEL_OFFSET 0x24 +#define PRCI_CORECLKSEL_CORECLKSEL_SHIFT 0 +#define PRCI_CORECLKSEL_CORECLKSEL_MASK \ + (0x1 << PRCI_CORECLKSEL_CORECLKSEL_SHIFT) + +/* DEVICESRESETREG */ +#define PRCI_DEVICESRESETREG_OFFSET 0x28 +#define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT 0 +#define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_MASK \ + (0x1 << PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT) +#define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT 1 +#define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_MASK \ + (0x1 << PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT) +#define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT 2 +#define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_MASK \ + (0x1 << PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT) +#define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT 3 +#define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_MASK \ + (0x1 << PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT) +#define PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT 5 +#define PRCI_DEVICESRESETREG_GEMGXL_RST_N_MASK \ + (0x1 << PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT) +#define PRCI_DEVICESRESETREG_CHIPLINK_RST_N_SHIFT 6 +#define PRCI_DEVICESRESETREG_CHIPLINK_RST_N_MASK \ + (0x1 << PRCI_DEVICESRESETREG_CHIPLINK_RST_N_SHIFT) + +/* CLKMUXSTATUSREG */ +#define PRCI_CLKMUXSTATUSREG_OFFSET 0x2c +#define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT 1 +#define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK \ + (0x1 << PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT) + +/* + * Private structures + */ + +/** + * struct __prci_data - per-device-instance data + * @va: base virtual address of the PRCI IP block + * @hw_clks: encapsulates struct clk_hw records + * + * PRCI per-device instance data + */ +struct __prci_data { + void __iomem *va; + struct clk_hw_onecell_data hw_clks; +}; + +/** + * struct __prci_wrpll_data - WRPLL configuration and integration data + * @c: WRPLL current configuration record + * @enable_bypass: fn ptr to code to bypass the WRPLL (if applicable; else NULL) + * @disable_bypass: fn ptr to code to not bypass the WRPLL (or NULL) + * @cfg0_offs: WRPLL CFG0 register offset (in bytes) from the PRCI base address + * + * @enable_bypass and @disable_bypass are used for WRPLL instances + * that contain a separate external glitchless clock mux downstream + * from the PLL. The WRPLL internal bypass mux is not glitchless. + */ +struct __prci_wrpll_data { + struct wrpll_cfg c; + void (*enable_bypass)(struct __prci_data *pd); + void (*disable_bypass)(struct __prci_data *pd); + u8 cfg0_offs; +}; + +/** + * struct __prci_clock - describes a clock device managed by PRCI + * @name: user-readable clock name string - should match the manual + * @parent_name: parent name for this clock + * @ops: struct clk_ops for the Linux clock framework to use for control + * @hw: Linux-private clock data + * @pwd: WRPLL-specific data, associated with this clock (if not NULL) + * @pd: PRCI-specific data associated with this clock (if not NULL) + * + * PRCI clock data. Used by the PRCI driver to register PRCI-provided + * clocks to the Linux clock infrastructure. + */ +struct __prci_clock { + const char *name; + const char *parent_name; + const struct clk_ops *ops; + struct clk_hw hw; + struct __prci_wrpll_data *pwd; + struct __prci_data *pd; +}; + +#define clk_hw_to_prci_clock(pwd) container_of(pwd, struct __prci_clock, hw) + +/* + * struct prci_clk_desc - describes the information of clocks of each SoCs + * @clks: point to a array of __prci_clock + * @num_clks: the number of element of clks + */ +struct prci_clk_desc { + struct __prci_clock *clks; + size_t num_clks; +}; + +/* Core clock mux control */ +void sifive_prci_coreclksel_use_hfclk(struct __prci_data *pd); +void sifive_prci_coreclksel_use_corepll(struct __prci_data *pd); + +/* Linux clock framework integration */ +long sifive_prci_wrpll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate); +int sifive_prci_wrpll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate); +unsigned long sifive_prci_wrpll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate); +unsigned long sifive_prci_tlclksel_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate); + +#endif /* __SIFIVE_CLK_SIFIVE_PRCI_H */ |