[PATCH v4 3/7] drivers: clk: add fu740 support

Add fu740 support. One abstract layer is added for supporting multiple chips such as fu540 and fu740.

Signed-off-by: Green Wan green.wan@sifive.com --- drivers/clk/sifive/Kconfig | 8 +- drivers/clk/sifive/Makefile | 4 +- drivers/clk/sifive/fu540-prci.c | 769 +------------------------------ drivers/clk/sifive/fu540-prci.h | 22 + drivers/clk/sifive/fu740-prci.c | 158 +++++++ drivers/clk/sifive/fu740-prci.h | 22 + drivers/clk/sifive/sifive-prci.c | 733 +++++++++++++++++++++++++++++ drivers/clk/sifive/sifive-prci.h | 323 +++++++++++++ 8 files changed, 1286 insertions(+), 753 deletions(-) create mode 100644 drivers/clk/sifive/fu540-prci.h create mode 100644 drivers/clk/sifive/fu740-prci.c create mode 100644 drivers/clk/sifive/fu740-prci.h create mode 100644 drivers/clk/sifive/sifive-prci.c create mode 100644 drivers/clk/sifive/sifive-prci.h

diff --git a/drivers/clk/sifive/Kconfig b/drivers/clk/sifive/Kconfig index c4d0a1f9b1..20fc004b59 100644 --- a/drivers/clk/sifive/Kconfig +++ b/drivers/clk/sifive/Kconfig @@ -6,11 +6,11 @@ config CLK_SIFIVE help SoC drivers for SiFive Linux-capable SoCs.

-config CLK_SIFIVE_FU540_PRCI - bool "PRCI driver for SiFive FU540 SoCs" +config CLK_SIFIVE_PRCI + bool "PRCI driver for SiFive SoCs" depends on CLK_SIFIVE select CLK_ANALOGBITS_WRPLL_CLN28HPC help Supports the Power Reset Clock interface (PRCI) IP block found in - FU540 SoCs. If this kernel is meant to run on a SiFive FU540 SoC, - enable this driver. + FU540/FU740 SoCs. If this kernel is meant to run on a SiFive FU540/ + FU740 SoCs, enable this driver. diff --git a/drivers/clk/sifive/Makefile b/drivers/clk/sifive/Makefile index b224279afb..51348b1ddc 100644 --- a/drivers/clk/sifive/Makefile +++ b/drivers/clk/sifive/Makefile @@ -1,3 +1,5 @@ # SPDX-License-Identifier: GPL-2.0+

-obj-$(CONFIG_CLK_SIFIVE_FU540_PRCI) += fu540-prci.o +obj-y += sifive-prci.o + +obj-$(CONFIG_CLK_SIFIVE_PRCI) += fu540-prci.o fu740-prci.o diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c index b3882d0b77..ceb2c6fab0 100644 --- a/drivers/clk/sifive/fu540-prci.c +++ b/drivers/clk/sifive/fu540-prci.c @@ -5,6 +5,8 @@ * Copyright (C) 2018 SiFive, Inc. * Wesley Terpstra * Paul Walmsley + * Zong Li + * Pragnesh Patel * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -15,632 +17,48 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * The FU540 PRCI implements clock and reset control for the SiFive - * FU540-C000 chip. This driver assumes that it has sole control - * over all PRCI resources. - * - * This driver is based on the PRCI driver written by Wesley Terpstra. - * - * Refer, commit 999529edf517ed75b56659d456d221b2ee56bb60 of: - * https://github.com/riscv/riscv-linux - * * References: * - SiFive FU540-C000 manual v1p0, Chapter 7 "Clocking and Reset" */

-#include <common.h> -#include <clk-uclass.h> -#include <clk.h> -#include <div64.h> -#include <dm.h> -#include <dm/device.h> -#include <dm/device_compat.h> -#include <dm/uclass.h> #include <dt-bindings/clock/sifive-fu540-prci.h> -#include <dt-bindings/reset/sifive-fu540-prci.h> -#include <errno.h> -#include <reset-uclass.h> -#include <asm/io.h> -#include <asm/arch/reset.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/math64.h> -#include <linux/clk/analogbits-wrpll-cln28hpc.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) - -/* COREPLLCFG1 */ -#define PRCI_COREPLLCFG1_OFFSET 0x8 -#define PRCI_COREPLLCFG1_CKE_SHIFT 31 -#define PRCI_COREPLLCFG1_CKE_MASK (0x1 << PRCI_COREPLLCFG1_CKE_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 31 -#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 31 -#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_DEVICERESETCNT 5 - -#define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_MASK \ - (0x1 << PRCI_RST_DDR_CTRL_N) -#define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_MASK \ - (0x1 << PRCI_RST_DDR_AXI_N) -#define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_MASK \ - (0x1 << PRCI_RST_DDR_AHB_N) -#define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_MASK \ - (0x1 << PRCI_RST_DDR_PHY_N) -#define PRCI_DEVICESRESETREG_GEMGXL_RST_N_MASK \ - (0x1 << PRCI_RST_GEMGXL_N) - -/* 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) - -/* PROCMONCFG */ -#define PRCI_PROCMONCFG_OFFSET 0xF0 -#define PRCI_PROCMONCFG_CORE_CLOCK_SHIFT 24 -#define PRCI_PROCMONCFG_CORE_CLOCK_MASK \ - (0x1 << PRCI_PROCMONCFG_CORE_CLOCK_SHIFT) - -/* - * Private structures - */ - -/** - * struct __prci_data - per-device-instance data - * @va: base virtual address of the PRCI IP block - * @parent: parent clk instance - * - * PRCI per-device instance data - */ -struct __prci_data { - void *va; - struct clk parent_hfclk; - struct clk parent_rtcclk; -}; - -/** - * 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 - * @cfg1_offs: WRPLL CFG1 register offset (in bytes) from the PRCI base address - * @release_reset: fn ptr to code to release clock reset - * - * @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; - u8 cfg1_offs; - void (*release_reset)(struct __prci_data *pd); -}; - -struct __prci_clock; - -/* struct __prci_clock_ops - clock operations */ -struct __prci_clock_ops { - int (*set_rate)(struct __prci_clock *pc, - unsigned long rate, - unsigned long parent_rate); - unsigned long (*round_rate)(struct __prci_clock *pc, - unsigned long rate, - unsigned long *parent_rate); - unsigned long (*recalc_rate)(struct __prci_clock *pc, - unsigned long parent_rate); - int (*enable_clk)(struct __prci_clock *pc, bool enable); -}; - -/** - * 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 __prci_clock_ops for control - * @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 __prci_clock_ops *ops; - struct __prci_wrpll_data *pwd; - struct __prci_data *pd; -}; - -/* - * Private functions - */ - -/** - * __prci_readl() - read from a PRCI register - * @pd: PRCI context - * @offs: register offset to read from (in bytes, from PRCI base address) - * - * Read the register located at offset @offs from the base virtual - * address of the PRCI register target described by @pd, and return - * the value to the caller. - * - * Context: Any context. - * - * Return: the contents of the register described by @pd and @offs. - */ -static u32 __prci_readl(struct __prci_data *pd, u32 offs) -{ - return readl(pd->va + offs); -} - -static void __prci_writel(u32 v, u32 offs, struct __prci_data *pd) -{ - writel(v, pd->va + offs); -} - -/* WRPLL-related private functions */ - -/** - * __prci_wrpll_unpack() - unpack WRPLL configuration registers into parameters - * @c: ptr to a struct wrpll_cfg record to write config into - * @r: value read from the PRCI PLL configuration register - * - * Given a value @r read from an FU540 PRCI PLL configuration register, - * split it into fields and populate it into the WRPLL configuration record - * pointed to by @c. - * - * The COREPLLCFG0 macros are used below, but the other *PLLCFG0 macros - * have the same register layout. - * - * Context: Any context. - */ -static void __prci_wrpll_unpack(struct wrpll_cfg *c, u32 r) -{ - u32 v; - - v = r & PRCI_COREPLLCFG0_DIVR_MASK; - v >>= PRCI_COREPLLCFG0_DIVR_SHIFT; - c->divr = v; - - v = r & PRCI_COREPLLCFG0_DIVF_MASK; - v >>= PRCI_COREPLLCFG0_DIVF_SHIFT; - c->divf = v; - - v = r & PRCI_COREPLLCFG0_DIVQ_MASK; - v >>= PRCI_COREPLLCFG0_DIVQ_SHIFT; - c->divq = v; - - v = r & PRCI_COREPLLCFG0_RANGE_MASK; - v >>= PRCI_COREPLLCFG0_RANGE_SHIFT; - c->range = v; - - c->flags &= (WRPLL_FLAGS_INT_FEEDBACK_MASK | - WRPLL_FLAGS_EXT_FEEDBACK_MASK); - - /* external feedback mode not supported */ - c->flags |= WRPLL_FLAGS_INT_FEEDBACK_MASK; -} - -/** - * __prci_wrpll_pack() - pack PLL configuration parameters into a register value - * @c: pointer to a struct wrpll_cfg record containing the PLL's cfg - * - * Using a set of WRPLL configuration values pointed to by @c, - * assemble a PRCI PLL configuration register value, and return it to - * the caller. - * - * Context: Any context. Caller must ensure that the contents of the - * record pointed to by @c do not change during the execution - * of this function. - * - * Returns: a value suitable for writing into a PRCI PLL configuration - * register - */ -static u32 __prci_wrpll_pack(const struct wrpll_cfg *c) -{ - u32 r = 0; - - r |= c->divr << PRCI_COREPLLCFG0_DIVR_SHIFT; - r |= c->divf << PRCI_COREPLLCFG0_DIVF_SHIFT; - r |= c->divq << PRCI_COREPLLCFG0_DIVQ_SHIFT; - r |= c->range << PRCI_COREPLLCFG0_RANGE_SHIFT; - - /* external feedback mode not supported */ - r |= PRCI_COREPLLCFG0_FSE_MASK; - - return r; -} - -/** - * __prci_wrpll_read_cfg0() - read the WRPLL configuration from the PRCI - * @pd: PRCI context - * @pwd: PRCI WRPLL metadata - * - * Read the current configuration of the PLL identified by @pwd from - * the PRCI identified by @pd, and store it into the local configuration - * cache in @pwd. - * - * Context: Any context. Caller must prevent the records pointed to by - * @pd and @pwd from changing during execution. - */ -static void __prci_wrpll_read_cfg0(struct __prci_data *pd, - struct __prci_wrpll_data *pwd) -{ - __prci_wrpll_unpack(&pwd->c, __prci_readl(pd, pwd->cfg0_offs)); -} - -/** - * __prci_wrpll_write_cfg0() - write WRPLL configuration into the PRCI - * @pd: PRCI context - * @pwd: PRCI WRPLL metadata - * @c: WRPLL configuration record to write - * - * Write the WRPLL configuration described by @c into the WRPLL - * configuration register identified by @pwd in the PRCI instance - * described by @c. Make a cached copy of the WRPLL's current - * configuration so it can be used by other code. - * - * Context: Any context. Caller must prevent the records pointed to by - * @pd and @pwd from changing during execution. - */ -static void __prci_wrpll_write_cfg0(struct __prci_data *pd, - struct __prci_wrpll_data *pwd, - struct wrpll_cfg *c) -{ - __prci_writel(__prci_wrpll_pack(c), pwd->cfg0_offs, pd); - - memcpy(&pwd->c, c, sizeof(*c)); -} - -/** - * __prci_wrpll_write_cfg1() - write Clock enable/disable configuration - * into the PRCI - * @pd: PRCI context - * @pwd: PRCI WRPLL metadata - * @enable: Clock enable or disable value - */ -static void __prci_wrpll_write_cfg1(struct __prci_data *pd, - struct __prci_wrpll_data *pwd, - u32 enable) -{ - __prci_writel(enable, pwd->cfg1_offs, pd); -} - -/* Core clock mux control */ - -/** - * __prci_coreclksel_use_hfclk() - switch the CORECLK mux to output HFCLK - * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg - * - * Switch the CORECLK mux to the HFCLK input source; return once complete. - * - * Context: Any context. Caller must prevent concurrent changes to the - * PRCI_CORECLKSEL_OFFSET register. - */ -static void __prci_coreclksel_use_hfclk(struct __prci_data *pd) -{ - u32 r; - - r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); - r |= PRCI_CORECLKSEL_CORECLKSEL_MASK; - __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd); - - r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */ -} - -/** - * __prci_coreclksel_use_corepll() - switch the CORECLK mux to output COREPLL - * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg - * - * Switch the CORECLK mux to the PLL output clock; return once complete. - * - * Context: Any context. Caller must prevent concurrent changes to the - * PRCI_CORECLKSEL_OFFSET register. - */ -static void __prci_coreclksel_use_corepll(struct __prci_data *pd) -{ - u32 r; - - r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); - r &= ~PRCI_CORECLKSEL_CORECLKSEL_MASK; - __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd); - - r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */ -} - -static unsigned long sifive_fu540_prci_wrpll_recalc_rate( - struct __prci_clock *pc, - unsigned long parent_rate) -{ - struct __prci_wrpll_data *pwd = pc->pwd;

- return wrpll_calc_output_rate(&pwd->c, parent_rate); -} - -static unsigned long sifive_fu540_prci_wrpll_round_rate( - struct __prci_clock *pc, - unsigned long rate, - unsigned long *parent_rate) -{ - struct __prci_wrpll_data *pwd = pc->pwd; - struct wrpll_cfg c; - - memcpy(&c, &pwd->c, sizeof(c)); - - wrpll_configure_for_rate(&c, rate, *parent_rate); - - return wrpll_calc_output_rate(&c, *parent_rate); -} - -static int sifive_fu540_prci_wrpll_set_rate(struct __prci_clock *pc, - unsigned long rate, - unsigned long parent_rate) -{ - struct __prci_wrpll_data *pwd = pc->pwd; - struct __prci_data *pd = pc->pd; - int r; - - r = wrpll_configure_for_rate(&pwd->c, rate, parent_rate); - if (r) - return r; - - if (pwd->enable_bypass) - pwd->enable_bypass(pd); - - __prci_wrpll_write_cfg0(pd, pwd, &pwd->c); - - udelay(wrpll_calc_max_lock_us(&pwd->c)); - - if (pwd->disable_bypass) - pwd->disable_bypass(pd); - - return 0; -} - -static int sifive_fu540_prci_clock_enable(struct __prci_clock *pc, bool enable) -{ - struct __prci_wrpll_data *pwd = pc->pwd; - struct __prci_data *pd = pc->pd; - - if (enable) { - __prci_wrpll_write_cfg1(pd, pwd, PRCI_COREPLLCFG1_CKE_MASK); - - if (pwd->release_reset) - pwd->release_reset(pd); - } else { - u32 r; - - r = __prci_readl(pd, pwd->cfg1_offs); - r &= ~PRCI_COREPLLCFG1_CKE_MASK; - - __prci_wrpll_write_cfg1(pd, pwd, r); - } - - return 0; -} - -static const struct __prci_clock_ops sifive_fu540_prci_wrpll_clk_ops = { - .set_rate = sifive_fu540_prci_wrpll_set_rate, - .round_rate = sifive_fu540_prci_wrpll_round_rate, - .recalc_rate = sifive_fu540_prci_wrpll_recalc_rate, - .enable_clk = sifive_fu540_prci_clock_enable, -}; - -/* TLCLKSEL clock integration */ - -static unsigned long sifive_fu540_prci_tlclksel_recalc_rate( - struct __prci_clock *pc, - unsigned long parent_rate) -{ - struct __prci_data *pd = pc->pd; - u32 v; - u8 div; - - v = __prci_readl(pd, PRCI_CLKMUXSTATUSREG_OFFSET); - v &= PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK; - div = v ? 1 : 2; - - return div_u64(parent_rate, div); -} - -static const struct __prci_clock_ops sifive_fu540_prci_tlclksel_clk_ops = { - .recalc_rate = sifive_fu540_prci_tlclksel_recalc_rate, -}; - -static int __prci_consumer_reset(const char *rst_name, bool trigger) -{ - struct udevice *dev; - struct reset_ctl rst_sig; - int ret; - - ret = uclass_get_device_by_driver(UCLASS_RESET, - DM_DRIVER_GET(sifive_reset), - &dev); - if (ret) { - dev_err(dev, "Reset driver not found: %d\n", ret); - return ret; - } - - ret = reset_get_by_name(dev, rst_name, &rst_sig); - if (ret) { - dev_err(dev, "failed to get %s reset\n", rst_name); - return ret; - } - - if (reset_valid(&rst_sig)) { - if (trigger) - ret = reset_deassert(&rst_sig); - else - ret = reset_assert(&rst_sig); - if (ret) { - dev_err(dev, "failed to trigger reset id = %ld\n", - rst_sig.id); - return ret; - } - } - - return ret; -} - -/** - * __prci_ddr_release_reset() - Release DDR reset - * @pd: struct __prci_data * for the PRCI containing the DDRCLK mux reg - * - */ -static void __prci_ddr_release_reset(struct __prci_data *pd) -{ - /* Release DDR ctrl reset */ - __prci_consumer_reset("ddr_ctrl", true); - - /* HACK to get the '1 full controller clock cycle'. */ - asm volatile ("fence"); - - /* Release DDR AXI reset */ - __prci_consumer_reset("ddr_axi", true); - - /* Release DDR AHB reset */ - __prci_consumer_reset("ddr_ahb", true); - - /* Release DDR PHY reset */ - __prci_consumer_reset("ddr_phy", true); - - /* HACK to get the '1 full controller clock cycle'. */ - asm volatile ("fence"); - - /* - * These take like 16 cycles to actually propagate. We can't go sending - * stuff before they come out of reset. So wait. - */ - for (int i = 0; i < 256; i++) - asm volatile ("nop"); -} - -/** - * __prci_ethernet_release_reset() - Release ethernet reset - * @pd: struct __prci_data * for the PRCI containing the Ethernet CLK mux reg - * - */ -static void __prci_ethernet_release_reset(struct __prci_data *pd) -{ - /* Release GEMGXL reset */ - __prci_consumer_reset("gemgxl_reset", true); - - /* Procmon => core clock */ - __prci_writel(PRCI_PROCMONCFG_CORE_CLOCK_MASK, PRCI_PROCMONCFG_OFFSET, - pd); -} - -/* - * PRCI integration data for each WRPLL instance - */ +#include "sifive-prci.h"

+/* PRCI integration data for each WRPLL instance */ static struct __prci_wrpll_data __prci_corepll_data = { .cfg0_offs = PRCI_COREPLLCFG0_OFFSET, .cfg1_offs = PRCI_COREPLLCFG1_OFFSET, - .enable_bypass = __prci_coreclksel_use_hfclk, - .disable_bypass = __prci_coreclksel_use_corepll, + .enable_bypass = sifive_prci_coreclksel_use_hfclk, + .disable_bypass = sifive_prci_coreclksel_use_corepll, };

static struct __prci_wrpll_data __prci_ddrpll_data = { .cfg0_offs = PRCI_DDRPLLCFG0_OFFSET, .cfg1_offs = PRCI_DDRPLLCFG1_OFFSET, - .release_reset = __prci_ddr_release_reset, + .release_reset = sifive_prci_ddr_release_reset, };

static struct __prci_wrpll_data __prci_gemgxlpll_data = { .cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET, .cfg1_offs = PRCI_GEMGXLPLLCFG1_OFFSET, - .release_reset = __prci_ethernet_release_reset, + .release_reset = sifive_prci_ethernet_release_reset, };

-/* - * List of clock controls provided by the PRCI - */ +/* Linux clock framework integration */ +static const struct __prci_clock_ops sifive_fu540_prci_wrpll_clk_ops = { + .set_rate = sifive_prci_wrpll_set_rate, + .round_rate = sifive_prci_wrpll_round_rate, + .recalc_rate = sifive_prci_wrpll_recalc_rate, + .enable_clk = sifive_prci_clock_enable, +};

-static struct __prci_clock __prci_init_clocks[] = { +static const struct __prci_clock_ops sifive_fu540_prci_tlclksel_clk_ops = { + .recalc_rate = sifive_prci_tlclksel_recalc_rate, +}; + +/* List of clock controls provided by the PRCI */ +struct __prci_clock __prci_init_clocks_fu540[] = { [PRCI_CLK_COREPLL] = { .name = "corepll", .parent_name = "hfclk", @@ -665,148 +83,3 @@ static struct __prci_clock __prci_init_clocks[] = { .ops = &sifive_fu540_prci_tlclksel_clk_ops, }, }; - -static ulong sifive_fu540_prci_parent_rate(struct __prci_clock *pc) -{ - ulong parent_rate; - struct __prci_clock *p; - - if (strcmp(pc->parent_name, "corepll") == 0) { - p = &__prci_init_clocks[PRCI_CLK_COREPLL]; - if (!p->pd || !p->ops->recalc_rate) - return -ENXIO; - - return p->ops->recalc_rate(p, sifive_fu540_prci_parent_rate(p)); - } - - if (strcmp(pc->parent_name, "rtcclk") == 0) - parent_rate = clk_get_rate(&pc->pd->parent_rtcclk); - else - parent_rate = clk_get_rate(&pc->pd->parent_hfclk); - - return parent_rate; -} - -static ulong sifive_fu540_prci_get_rate(struct clk *clk) -{ - struct __prci_clock *pc; - - if (ARRAY_SIZE(__prci_init_clocks) <= clk->id) - return -ENXIO; - - pc = &__prci_init_clocks[clk->id]; - if (!pc->pd || !pc->ops->recalc_rate) - return -ENXIO; - - return pc->ops->recalc_rate(pc, sifive_fu540_prci_parent_rate(pc)); -} - -static ulong sifive_fu540_prci_set_rate(struct clk *clk, ulong rate) -{ - int err; - struct __prci_clock *pc; - - if (ARRAY_SIZE(__prci_init_clocks) <= clk->id) - return -ENXIO; - - pc = &__prci_init_clocks[clk->id]; - if (!pc->pd || !pc->ops->set_rate) - return -ENXIO; - - err = pc->ops->set_rate(pc, rate, sifive_fu540_prci_parent_rate(pc)); - if (err) - return err; - - return rate; -} - -static int sifive_fu540_prci_enable(struct clk *clk) -{ - struct __prci_clock *pc; - int ret = 0; - - if (ARRAY_SIZE(__prci_init_clocks) <= clk->id) - return -ENXIO; - - pc = &__prci_init_clocks[clk->id]; - if (!pc->pd) - return -ENXIO; - - if (pc->ops->enable_clk) - ret = pc->ops->enable_clk(pc, 1); - - return ret; -} - -static int sifive_fu540_prci_disable(struct clk *clk) -{ - struct __prci_clock *pc; - int ret = 0; - - if (ARRAY_SIZE(__prci_init_clocks) <= clk->id) - return -ENXIO; - - pc = &__prci_init_clocks[clk->id]; - if (!pc->pd) - return -ENXIO; - - if (pc->ops->enable_clk) - ret = pc->ops->enable_clk(pc, 0); - - return ret; -} - -static int sifive_fu540_prci_probe(struct udevice *dev) -{ - int i, err; - struct __prci_clock *pc; - struct __prci_data *pd = dev_get_priv(dev); - - pd->va = (void *)dev_read_addr(dev); - if (IS_ERR(pd->va)) - return PTR_ERR(pd->va); - - err = clk_get_by_index(dev, 0, &pd->parent_hfclk); - if (err) - return err; - - err = clk_get_by_index(dev, 1, &pd->parent_rtcclk); - if (err) - return err; - - for (i = 0; i < ARRAY_SIZE(__prci_init_clocks); ++i) { - pc = &__prci_init_clocks[i]; - pc->pd = pd; - if (pc->pwd) - __prci_wrpll_read_cfg0(pd, pc->pwd); - } - - return 0; -} - -static struct clk_ops sifive_fu540_prci_ops = { - .set_rate = sifive_fu540_prci_set_rate, - .get_rate = sifive_fu540_prci_get_rate, - .enable = sifive_fu540_prci_enable, - .disable = sifive_fu540_prci_disable, -}; - -static int sifive_fu540_clk_bind(struct udevice *dev) -{ - return sifive_reset_bind(dev, PRCI_DEVICERESETCNT); -} - -static const struct udevice_id sifive_fu540_prci_ids[] = { - { .compatible = "sifive,fu540-c000-prci" }, - { } -}; - -U_BOOT_DRIVER(sifive_fu540_prci) = { - .name = "sifive-fu540-prci", - .id = UCLASS_CLK, - .of_match = sifive_fu540_prci_ids, - .probe = sifive_fu540_prci_probe, - .ops = &sifive_fu540_prci_ops, - .priv_auto = sizeof(struct __prci_data), - .bind = sifive_fu540_clk_bind, -}; diff --git a/drivers/clk/sifive/fu540-prci.h b/drivers/clk/sifive/fu540-prci.h new file mode 100644 index 0000000000..113301107d --- /dev/null +++ b/drivers/clk/sifive/fu540-prci.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 SiFive, Inc. + * Zong Li + * Pragnesh Patel + */ + +#ifndef __SIFIVE_CLK_FU540_PRCI_H +#define __SIFIVE_CLK_FU540_PRCI_H + +#include "sifive-prci.h" + +#define NUM_CLOCK_FU540 4 + +extern struct __prci_clock __prci_init_clocks_fu540[NUM_CLOCK_FU540]; + +static const struct prci_clk_desc prci_clk_fu540 = { + .clks = __prci_init_clocks_fu540, + .num_clks = ARRAY_SIZE(__prci_init_clocks_fu540), +}; + +#endif /* __SIFIVE_CLK_FU540_PRCI_H */ diff --git a/drivers/clk/sifive/fu740-prci.c b/drivers/clk/sifive/fu740-prci.c new file mode 100644 index 0000000000..9a642c1c99 --- /dev/null +++ b/drivers/clk/sifive/fu740-prci.c @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018-2021 SiFive, Inc. + * Wesley Terpstra + * Paul Walmsley + * Zong Li + * Pragnesh Patel + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <dt-bindings/clock/sifive-fu740-prci.h> +#include "sifive-prci.h" +#include <asm/io.h> + +int sifive_prci_fu740_pciauxclk_enable(struct __prci_clock *pc, bool enable) +{ + struct __prci_wrpll_data *pwd = pc->pwd; + struct __prci_data *pd = pc->pd; + u32 v; + + if (pwd->cfg1_offs != PRCI_PCIEAUXCFG1_OFFSET) + return -EINVAL; + + v = readl(pd->va + pwd->cfg1_offs); + v = enable ? (v | PRCI_PCIEAUXCFG1_MASK) : (v & ~PRCI_PCIEAUXCFG1_MASK); + writel(v, pd->va + pwd->cfg1_offs); + + return 0; +} + +/* PRCI integration data for each WRPLL instance */ +static struct __prci_wrpll_data __prci_corepll_data = { + .cfg0_offs = PRCI_COREPLLCFG0_OFFSET, + .cfg1_offs = PRCI_COREPLLCFG1_OFFSET, + .enable_bypass = sifive_prci_coreclksel_use_hfclk, + .disable_bypass = sifive_prci_coreclksel_use_final_corepll, +}; + +static struct __prci_wrpll_data __prci_ddrpll_data = { + .cfg0_offs = PRCI_DDRPLLCFG0_OFFSET, + .cfg1_offs = PRCI_DDRPLLCFG1_OFFSET, + .release_reset = sifive_prci_ddr_release_reset, +}; + +static struct __prci_wrpll_data __prci_gemgxlpll_data = { + .cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET, + .cfg1_offs = PRCI_GEMGXLPLLCFG1_OFFSET, + .release_reset = sifive_prci_ethernet_release_reset, +}; + +static struct __prci_wrpll_data __prci_dvfscorepll_data = { + .cfg0_offs = PRCI_DVFSCOREPLLCFG0_OFFSET, + .cfg1_offs = PRCI_DVFSCOREPLLCFG1_OFFSET, + .enable_bypass = sifive_prci_corepllsel_use_corepll, + .disable_bypass = sifive_prci_corepllsel_use_dvfscorepll, +}; + +static struct __prci_wrpll_data __prci_hfpclkpll_data = { + .cfg0_offs = PRCI_HFPCLKPLLCFG0_OFFSET, + .cfg1_offs = PRCI_HFPCLKPLLCFG1_OFFSET, + .enable_bypass = sifive_prci_hfpclkpllsel_use_hfclk, + .disable_bypass = sifive_prci_hfpclkpllsel_use_hfpclkpll, +}; + +static struct __prci_wrpll_data __prci_cltxpll_data = { + .cfg0_offs = PRCI_CLTXPLLCFG0_OFFSET, + .cfg1_offs = PRCI_CLTXPLLCFG1_OFFSET, + .release_reset = sifive_prci_cltx_release_reset, +}; + +static struct __prci_wrpll_data __prci_pcieaux_data = { + .cfg1_offs = PRCI_PCIEAUXCFG1_OFFSET, +}; + +/* Linux clock framework integration */ + +static const struct __prci_clock_ops sifive_fu740_prci_wrpll_clk_ops = { + .set_rate = sifive_prci_wrpll_set_rate, + .round_rate = sifive_prci_wrpll_round_rate, + .recalc_rate = sifive_prci_wrpll_recalc_rate, + .enable_clk = sifive_prci_clock_enable, +}; + +static const struct __prci_clock_ops sifive_fu740_prci_tlclksel_clk_ops = { + .recalc_rate = sifive_prci_tlclksel_recalc_rate, +}; + +static const struct __prci_clock_ops sifive_fu740_prci_hfpclkplldiv_clk_ops = { + .recalc_rate = sifive_prci_hfpclkplldiv_recalc_rate, +}; + +static const struct __prci_clock_ops sifive_fu740_prci_pcieaux_clk_ops = { + .enable_clk = sifive_prci_fu740_pciauxclk_enable, +}; + +/* List of clock controls provided by the PRCI */ +struct __prci_clock __prci_init_clocks_fu740[] = { + [PRCI_CLK_COREPLL] = { + .name = "corepll", + .parent_name = "hfclk", + .ops = &sifive_fu740_prci_wrpll_clk_ops, + .pwd = &__prci_corepll_data, + }, + [PRCI_CLK_DDRPLL] = { + .name = "ddrpll", + .parent_name = "hfclk", + .ops = &sifive_fu740_prci_wrpll_clk_ops, + .pwd = &__prci_ddrpll_data, + }, + [PRCI_CLK_GEMGXLPLL] = { + .name = "gemgxlpll", + .parent_name = "hfclk", + .ops = &sifive_fu740_prci_wrpll_clk_ops, + .pwd = &__prci_gemgxlpll_data, + }, + [PRCI_CLK_DVFSCOREPLL] = { + .name = "dvfscorepll", + .parent_name = "hfclk", + .ops = &sifive_fu740_prci_wrpll_clk_ops, + .pwd = &__prci_dvfscorepll_data, + }, + [PRCI_CLK_HFPCLKPLL] = { + .name = "hfpclkpll", + .parent_name = "hfclk", + .ops = &sifive_fu740_prci_wrpll_clk_ops, + .pwd = &__prci_hfpclkpll_data, + }, + [PRCI_CLK_CLTXPLL] = { + .name = "cltxpll", + .parent_name = "hfclk", + .ops = &sifive_fu740_prci_wrpll_clk_ops, + .pwd = &__prci_cltxpll_data, + }, + [PRCI_CLK_TLCLK] = { + .name = "tlclk", + .parent_name = "corepll", + .ops = &sifive_fu740_prci_tlclksel_clk_ops, + }, + [PRCI_CLK_PCLK] = { + .name = "pclk", + .parent_name = "hfpclkpll", + .ops = &sifive_fu740_prci_hfpclkplldiv_clk_ops, + }, + [PRCI_CLK_PCIEAUX] { + .name = "pciaux", + .parent_name = "", + .ops = &sifive_fu740_prci_pcieaux_clk_ops, + .pwd = &__prci_pcieaux_data, + } +}; diff --git a/drivers/clk/sifive/fu740-prci.h b/drivers/clk/sifive/fu740-prci.h new file mode 100644 index 0000000000..b74f078906 --- /dev/null +++ b/drivers/clk/sifive/fu740-prci.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 SiFive, Inc. + * Zong Li + * Pragnesh Patel + */ + +#ifndef __SIFIVE_CLK_FU740_PRCI_H +#define __SIFIVE_CLK_FU740_PRCI_H + +#include "sifive-prci.h" + +#define NUM_CLOCK_FU740 9 + +extern struct __prci_clock __prci_init_clocks_fu740[NUM_CLOCK_FU740]; + +static const struct prci_clk_desc prci_clk_fu740 = { + .clks = __prci_init_clocks_fu740, + .num_clks = ARRAY_SIZE(__prci_init_clocks_fu740), +}; + +#endif /* __SIFIVE_CLK_FU740_PRCI_H */ diff --git a/drivers/clk/sifive/sifive-prci.c b/drivers/clk/sifive/sifive-prci.c new file mode 100644 index 0000000000..cd1acb9442 --- /dev/null +++ b/drivers/clk/sifive/sifive-prci.c @@ -0,0 +1,733 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018-2021 SiFive, Inc. + * Wesley Terpstra + * Paul Walmsley + * Zong Li + * Pragnesh Patel + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * The PRCI implements clock and reset control for the SiFive chip. + * This driver assumes that it has sole control over all PRCI resources. + * + * This driver is based on the PRCI driver written by Wesley Terpstra: + * https://github.com/riscv/riscv-linux/commit/999529edf517ed75b56659d456d221b2... + */ + +#include <common.h> +#include <clk-uclass.h> +#include <clk.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <reset.h> +#include <asm/io.h> +#include <asm/arch/reset.h> +#include <linux/delay.h> +#include <linux/math64.h> +#include <dt-bindings/clock/sifive-fu740-prci.h> + +#include "fu540-prci.h" +#include "fu740-prci.h" + +/* + * Private functions + */ + +/** + * __prci_readl() - read from a PRCI register + * @pd: PRCI context + * @offs: register offset to read from (in bytes, from PRCI base address) + * + * Read the register located at offset @offs from the base virtual + * address of the PRCI register target described by @pd, and return + * the value to the caller. + * + * Context: Any context. + * + * Return: the contents of the register described by @pd and @offs. + */ +static u32 __prci_readl(struct __prci_data *pd, u32 offs) +{ + return readl(pd->va + offs); +} + +static void __prci_writel(u32 v, u32 offs, struct __prci_data *pd) +{ + writel(v, pd->va + offs); +} + +/* WRPLL-related private functions */ + +/** + * __prci_wrpll_unpack() - unpack WRPLL configuration registers into parameters + * @c: ptr to a struct wrpll_cfg record to write config into + * @r: value read from the PRCI PLL configuration register + * + * Given a value @r read from an FU540 PRCI PLL configuration register, + * split it into fields and populate it into the WRPLL configuration record + * pointed to by @c. + * + * The COREPLLCFG0 macros are used below, but the other *PLLCFG0 macros + * have the same register layout. + * + * Context: Any context. + */ +static void __prci_wrpll_unpack(struct wrpll_cfg *c, u32 r) +{ + u32 v; + + v = r & PRCI_COREPLLCFG0_DIVR_MASK; + v >>= PRCI_COREPLLCFG0_DIVR_SHIFT; + c->divr = v; + + v = r & PRCI_COREPLLCFG0_DIVF_MASK; + v >>= PRCI_COREPLLCFG0_DIVF_SHIFT; + c->divf = v; + + v = r & PRCI_COREPLLCFG0_DIVQ_MASK; + v >>= PRCI_COREPLLCFG0_DIVQ_SHIFT; + c->divq = v; + + v = r & PRCI_COREPLLCFG0_RANGE_MASK; + v >>= PRCI_COREPLLCFG0_RANGE_SHIFT; + c->range = v; + + c->flags &= (WRPLL_FLAGS_INT_FEEDBACK_MASK | + WRPLL_FLAGS_EXT_FEEDBACK_MASK); + + /* external feedback mode not supported */ + c->flags |= WRPLL_FLAGS_INT_FEEDBACK_MASK; +} + +/** + * __prci_wrpll_pack() - pack PLL configuration parameters into a register value + * @c: pointer to a struct wrpll_cfg record containing the PLL's cfg + * + * Using a set of WRPLL configuration values pointed to by @c, + * assemble a PRCI PLL configuration register value, and return it to + * the caller. + * + * Context: Any context. Caller must ensure that the contents of the + * record pointed to by @c do not change during the execution + * of this function. + * + * Returns: a value suitable for writing into a PRCI PLL configuration + * register + */ +static u32 __prci_wrpll_pack(const struct wrpll_cfg *c) +{ + u32 r = 0; + + r |= c->divr << PRCI_COREPLLCFG0_DIVR_SHIFT; + r |= c->divf << PRCI_COREPLLCFG0_DIVF_SHIFT; + r |= c->divq << PRCI_COREPLLCFG0_DIVQ_SHIFT; + r |= c->range << PRCI_COREPLLCFG0_RANGE_SHIFT; + + /* external feedback mode not supported */ + r |= PRCI_COREPLLCFG0_FSE_MASK; + + return r; +} + +/** + * __prci_wrpll_read_cfg0() - read the WRPLL configuration from the PRCI + * @pd: PRCI context + * @pwd: PRCI WRPLL metadata + * + * Read the current configuration of the PLL identified by @pwd from + * the PRCI identified by @pd, and store it into the local configuration + * cache in @pwd. + * + * Context: Any context. Caller must prevent the records pointed to by + * @pd and @pwd from changing during execution. + */ +static void __prci_wrpll_read_cfg0(struct __prci_data *pd, + struct __prci_wrpll_data *pwd) +{ + __prci_wrpll_unpack(&pwd->c, __prci_readl(pd, pwd->cfg0_offs)); +} + +/** + * __prci_wrpll_write_cfg0() - write WRPLL configuration into the PRCI + * @pd: PRCI context + * @pwd: PRCI WRPLL metadata + * @c: WRPLL configuration record to write + * + * Write the WRPLL configuration described by @c into the WRPLL + * configuration register identified by @pwd in the PRCI instance + * described by @c. Make a cached copy of the WRPLL's current + * configuration so it can be used by other code. + * + * Context: Any context. Caller must prevent the records pointed to by + * @pd and @pwd from changing during execution. + */ +static void __prci_wrpll_write_cfg0(struct __prci_data *pd, + struct __prci_wrpll_data *pwd, + struct wrpll_cfg *c) +{ + __prci_writel(__prci_wrpll_pack(c), pwd->cfg0_offs, pd); + + memcpy(&pwd->c, c, sizeof(*c)); +} + +/** + * __prci_wrpll_write_cfg1() - write Clock enable/disable configuration + * into the PRCI + * @pd: PRCI context + * @pwd: PRCI WRPLL metadata + * @enable: Clock enable or disable value + */ +static void __prci_wrpll_write_cfg1(struct __prci_data *pd, + struct __prci_wrpll_data *pwd, + u32 enable) +{ + __prci_writel(enable, pwd->cfg1_offs, pd); +} + +unsigned long sifive_prci_wrpll_recalc_rate(struct __prci_clock *pc, + unsigned long parent_rate) +{ + struct __prci_wrpll_data *pwd = pc->pwd; + + return wrpll_calc_output_rate(&pwd->c, parent_rate); +} + +unsigned long sifive_prci_wrpll_round_rate(struct __prci_clock *pc, + unsigned long rate, + unsigned long *parent_rate) +{ + struct __prci_wrpll_data *pwd = pc->pwd; + struct wrpll_cfg c; + + memcpy(&c, &pwd->c, sizeof(c)); + + wrpll_configure_for_rate(&c, rate, *parent_rate); + + return wrpll_calc_output_rate(&c, *parent_rate); +} + +int sifive_prci_wrpll_set_rate(struct __prci_clock *pc, + unsigned long rate, + unsigned long parent_rate) +{ + struct __prci_wrpll_data *pwd = pc->pwd; + struct __prci_data *pd = pc->pd; + int r; + + r = wrpll_configure_for_rate(&pwd->c, rate, parent_rate); + if (r) + return r; + + if (pwd->enable_bypass) + pwd->enable_bypass(pd); + + __prci_wrpll_write_cfg0(pd, pwd, &pwd->c); + + udelay(wrpll_calc_max_lock_us(&pwd->c)); + + return 0; +} + +int sifive_prci_clock_enable(struct __prci_clock *pc, bool enable) +{ + struct __prci_wrpll_data *pwd = pc->pwd; + struct __prci_data *pd = pc->pd; + + if (enable) { + __prci_wrpll_write_cfg1(pd, pwd, PRCI_COREPLLCFG1_CKE_MASK); + + if (pwd->disable_bypass) + pwd->disable_bypass(pd); + + if (pwd->release_reset) + pwd->release_reset(pd); + } else { + u32 r; + + if (pwd->enable_bypass) + pwd->enable_bypass(pd); + + r = __prci_readl(pd, pwd->cfg1_offs); + r &= ~PRCI_COREPLLCFG1_CKE_MASK; + + __prci_wrpll_write_cfg1(pd, pwd, r); + } + + return 0; +} + +/* TLCLKSEL clock integration */ + +unsigned long sifive_prci_tlclksel_recalc_rate(struct __prci_clock *pc, + unsigned long parent_rate) +{ + struct __prci_data *pd = pc->pd; + u32 v; + u8 div; + + v = __prci_readl(pd, PRCI_CLKMUXSTATUSREG_OFFSET); + v &= PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK; + div = v ? 1 : 2; + + return div_u64(parent_rate, div); +} + +/* HFPCLK clock integration */ + +unsigned long sifive_prci_hfpclkplldiv_recalc_rate(struct __prci_clock *pc, + unsigned long parent_rate) +{ + struct __prci_data *pd = pc->pd; + u32 div = __prci_readl(pd, PRCI_HFPCLKPLLDIV_OFFSET); + + return div_u64(parent_rate, div + 2); +} + +/** + * sifive_prci_coreclksel_use_final_corepll() - switch the CORECLK mux to output + * FINAL_COREPLL + * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg + * + * Switch the CORECLK mux to the final COREPLL output clock; return once + * complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_CORECLKSEL_OFFSET register. + */ +void sifive_prci_coreclksel_use_final_corepll(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); + r &= ~PRCI_CORECLKSEL_CORECLKSEL_MASK; + __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */ +} + +/** + * sifive_prci_corepllsel_use_dvfscorepll() - switch the COREPLL mux to + * output DVFS_COREPLL + * @pd: struct __prci_data * for the PRCI containing the COREPLL mux reg + * + * Switch the COREPLL mux to the DVFSCOREPLL output clock; return once complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_COREPLLSEL_OFFSET register. + */ +void sifive_prci_corepllsel_use_dvfscorepll(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET); + r |= PRCI_COREPLLSEL_COREPLLSEL_MASK; + __prci_writel(r, PRCI_COREPLLSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET); /* barrier */ +} + +/** + * sifive_prci_corepllsel_use_corepll() - switch the COREPLL mux to + * output COREPLL + * @pd: struct __prci_data * for the PRCI containing the COREPLL mux reg + * + * Switch the COREPLL mux to the COREPLL output clock; return once complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_COREPLLSEL_OFFSET register. + */ +void sifive_prci_corepllsel_use_corepll(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET); + r &= ~PRCI_COREPLLSEL_COREPLLSEL_MASK; + __prci_writel(r, PRCI_COREPLLSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET); /* barrier */ +} + +/** + * sifive_prci_hfpclkpllsel_use_hfclk() - switch the HFPCLKPLL mux to + * output HFCLK + * @pd: struct __prci_data * for the PRCI containing the HFPCLKPLL mux reg + * + * Switch the HFPCLKPLL mux to the HFCLK input source; return once complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_HFPCLKPLLSEL_OFFSET register. + */ +void sifive_prci_hfpclkpllsel_use_hfclk(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); + r |= PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_MASK; + __prci_writel(r, PRCI_HFPCLKPLLSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); /* barrier */ +} + +/** + * sifive_prci_hfpclkpllsel_use_hfpclkpll() - switch the HFPCLKPLL mux to + * output HFPCLKPLL + * @pd: struct __prci_data * for the PRCI containing the HFPCLKPLL mux reg + * + * Switch the HFPCLKPLL mux to the HFPCLKPLL output clock; return once complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_HFPCLKPLLSEL_OFFSET register. + */ +void sifive_prci_hfpclkpllsel_use_hfpclkpll(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); + r &= ~PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_MASK; + __prci_writel(r, PRCI_HFPCLKPLLSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); /* barrier */ +} + +static int __prci_consumer_reset(const char *rst_name, bool trigger) +{ + struct udevice *dev; + struct reset_ctl rst_sig; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_RESET, + DM_DRIVER_GET(sifive_reset), + &dev); + if (ret) { + dev_err(dev, "Reset driver not found: %d\n", ret); + return ret; + } + + ret = reset_get_by_name(dev, rst_name, &rst_sig); + if (ret) { + dev_err(dev, "failed to get %s reset\n", rst_name); + return ret; + } + + if (reset_valid(&rst_sig)) { + if (trigger) + ret = reset_deassert(&rst_sig); + else + ret = reset_assert(&rst_sig); + if (ret) { + dev_err(dev, "failed to trigger reset id = %ld\n", + rst_sig.id); + return ret; + } + } + + return ret; +} + +/** + * sifive_prci_ddr_release_reset() - Release DDR reset + * @pd: struct __prci_data * for the PRCI containing the DDRCLK mux reg + * + */ +void sifive_prci_ddr_release_reset(struct __prci_data *pd) +{ + /* Release DDR ctrl reset */ + __prci_consumer_reset("ddr_ctrl", true); + + /* HACK to get the '1 full controller clock cycle'. */ + asm volatile ("fence"); + + /* Release DDR AXI reset */ + __prci_consumer_reset("ddr_axi", true); + + /* Release DDR AHB reset */ + __prci_consumer_reset("ddr_ahb", true); + + /* Release DDR PHY reset */ + __prci_consumer_reset("ddr_phy", true); + + /* HACK to get the '1 full controller clock cycle'. */ + asm volatile ("fence"); + + /* + * These take like 16 cycles to actually propagate. We can't go sending + * stuff before they come out of reset. So wait. + */ + for (int i = 0; i < 256; i++) + asm volatile ("nop"); +} + +/** + * sifive_prci_ethernet_release_reset() - Release ethernet reset + * @pd: struct __prci_data * for the PRCI containing the Ethernet CLK mux reg + * + */ +void sifive_prci_ethernet_release_reset(struct __prci_data *pd) +{ + /* Release GEMGXL reset */ + __prci_consumer_reset("gemgxl_reset", true); + + /* Procmon => core clock */ + __prci_writel(PRCI_PROCMONCFG_CORE_CLOCK_MASK, PRCI_PROCMONCFG_OFFSET, + pd); + + /* Release Chiplink reset */ + __prci_consumer_reset("cltx_reset", true); +} + +/** + * sifive_prci_cltx_release_reset() - Release cltx reset + * @pd: struct __prci_data * for the PRCI containing the Ethernet CLK mux reg + * + */ +void sifive_prci_cltx_release_reset(struct __prci_data *pd) +{ + /* Release CLTX reset */ + __prci_consumer_reset("cltx_reset", true); +} + +/* Core clock mux control */ + +/** + * sifive_prci_coreclksel_use_hfclk() - switch the CORECLK mux to output HFCLK + * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg + * + * Switch the CORECLK mux to the HFCLK input source; return once complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_CORECLKSEL_OFFSET register. + */ +void sifive_prci_coreclksel_use_hfclk(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); + r |= PRCI_CORECLKSEL_CORECLKSEL_MASK; + __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */ +} + +/** + * sifive_prci_coreclksel_use_corepll() - switch the CORECLK mux to output COREPLL + * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg + * + * Switch the CORECLK mux to the PLL output clock; return once complete. + * + * Context: Any context. Caller must prevent concurrent changes to the + * PRCI_CORECLKSEL_OFFSET register. + */ +void sifive_prci_coreclksel_use_corepll(struct __prci_data *pd) +{ + u32 r; + + r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); + r &= ~PRCI_CORECLKSEL_CORECLKSEL_MASK; + __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd); + + r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */ +} + +static ulong sifive_prci_parent_rate(struct __prci_clock *pc, struct prci_clk_desc *data) +{ + ulong parent_rate; + ulong i; + struct __prci_clock *p; + + if (strcmp(pc->parent_name, "corepll") == 0 || + strcmp(pc->parent_name, "hfpclkpll") == 0) { + for (i = 0; i < data->num_clks; i++) { + if (strcmp(pc->parent_name, data->clks[i].name) == 0) + break; + } + + if (i >= data->num_clks) + return -ENXIO; + + p = &data->clks[i]; + if (!p->pd || !p->ops->recalc_rate) + return -ENXIO; + + return p->ops->recalc_rate(p, sifive_prci_parent_rate(p, data)); + } + + if (strcmp(pc->parent_name, "rtcclk") == 0) + parent_rate = clk_get_rate(&pc->pd->parent_rtcclk); + else + parent_rate = clk_get_rate(&pc->pd->parent_hfclk); + + return parent_rate; +} + +static ulong sifive_prci_get_rate(struct clk *clk) +{ + struct __prci_clock *pc; + struct prci_clk_desc *data = + (struct prci_clk_desc *)dev_get_driver_data(clk->dev); + + if (data->num_clks <= clk->id) + return -ENXIO; + + pc = &data->clks[clk->id]; + if (!pc->pd || !pc->ops->recalc_rate) + return -ENXIO; + + return pc->ops->recalc_rate(pc, sifive_prci_parent_rate(pc, data)); +} + +static ulong sifive_prci_set_rate(struct clk *clk, ulong rate) +{ + int err; + struct __prci_clock *pc; + struct prci_clk_desc *data = + (struct prci_clk_desc *)dev_get_driver_data(clk->dev); + + if (data->num_clks <= clk->id) + return -ENXIO; + + pc = &data->clks[clk->id]; + if (!pc->pd || !pc->ops->set_rate) + return -ENXIO; + + err = pc->ops->set_rate(pc, rate, sifive_prci_parent_rate(pc, data)); + if (err) + return err; + + return rate; +} + +static int sifive_prci_enable(struct clk *clk) +{ + struct __prci_clock *pc; + int ret = 0; + struct prci_clk_desc *data = + (struct prci_clk_desc *)dev_get_driver_data(clk->dev); + + if (data->num_clks <= clk->id) + return -ENXIO; + + pc = &data->clks[clk->id]; + if (!pc->pd) + return -ENXIO; + + if (pc->ops->enable_clk) + ret = pc->ops->enable_clk(pc, 1); + + return ret; +} + +static int sifive_prci_disable(struct clk *clk) +{ + struct __prci_clock *pc; + int ret = 0; + struct prci_clk_desc *data = + (struct prci_clk_desc *)dev_get_driver_data(clk->dev); + + if (data->num_clks <= clk->id) + return -ENXIO; + + pc = &data->clks[clk->id]; + if (!pc->pd) + return -ENXIO; + + if (pc->ops->enable_clk) + ret = pc->ops->enable_clk(pc, 0); + + return ret; +} + +static int sifive_prci_probe(struct udevice *dev) +{ + int i, err; + struct __prci_clock *pc; + struct __prci_data *pd = dev_get_priv(dev); + + struct prci_clk_desc *data = + (struct prci_clk_desc *)dev_get_driver_data(dev); + + pd->va = (void *)dev_read_addr(dev); + if (IS_ERR(pd->va)) + return PTR_ERR(pd->va); + + err = clk_get_by_index(dev, 0, &pd->parent_hfclk); + if (err) + return err; + + err = clk_get_by_index(dev, 1, &pd->parent_rtcclk); + if (err) + return err; + + for (i = 0; i < data->num_clks; ++i) { + pc = &data->clks[i]; + pc->pd = pd; + if (pc->pwd) + __prci_wrpll_read_cfg0(pd, pc->pwd); + } + + if (IS_ENABLED(CONFIG_SPL_BUILD)) { + if (device_is_compatible(dev, "sifive,fu740-c000-prci")) { + u32 prci_pll_reg; + unsigned long parent_rate; + + prci_pll_reg = readl(pd->va + PRCI_PRCIPLL_OFFSET); + + if (prci_pll_reg & PRCI_PRCIPLL_HFPCLKPLL) { + /* + * Only initialize the HFPCLK PLL. In this + * case the design uses hfpclk to drive + * Chiplink + */ + pc = &data->clks[PRCI_CLK_HFPCLKPLL]; + parent_rate = sifive_prci_parent_rate(pc, data); + sifive_prci_wrpll_set_rate(pc, 260000000, + parent_rate); + pc->ops->enable_clk(pc, 1); + } else if (prci_pll_reg & PRCI_PRCIPLL_CLTXPLL) { + /* CLTX pll init */ + pc = &data->clks[PRCI_CLK_CLTXPLL]; + parent_rate = sifive_prci_parent_rate(pc, data); + sifive_prci_wrpll_set_rate(pc, 260000000, + parent_rate); + pc->ops->enable_clk(pc, 1); + } + } + } + + return 0; +} + +static struct clk_ops sifive_prci_ops = { + .set_rate = sifive_prci_set_rate, + .get_rate = sifive_prci_get_rate, + .enable = sifive_prci_enable, + .disable = sifive_prci_disable, +}; + +static int sifive_clk_bind(struct udevice *dev) +{ + return sifive_reset_bind(dev, PRCI_DEVICERESETCNT); +} + +static const struct udevice_id sifive_prci_ids[] = { + { .compatible = "sifive,fu540-c000-prci", .data = (ulong)&prci_clk_fu540 }, + { .compatible = "sifive,fu740-c000-prci", .data = (ulong)&prci_clk_fu740 }, + { } +}; + +U_BOOT_DRIVER(sifive_prci) = { + .name = "sifive-prci", + .id = UCLASS_CLK, + .of_match = sifive_prci_ids, + .probe = sifive_prci_probe, + .ops = &sifive_prci_ops, + .priv_auto = sizeof(struct __prci_data), + .bind = sifive_clk_bind, +}; diff --git a/drivers/clk/sifive/sifive-prci.h b/drivers/clk/sifive/sifive-prci.h new file mode 100644 index 0000000000..5ce33d6184 --- /dev/null +++ b/drivers/clk/sifive/sifive-prci.h @@ -0,0 +1,323 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2021 SiFive, Inc. + * Wesley Terpstra + * Paul Walmsley + * Zong Li + * Pragnesh Patel + */ + +#ifndef __SIFIVE_CLK_SIFIVE_PRCI_H +#define __SIFIVE_CLK_SIFIVE_PRCI_H + +#include <clk.h> +#include <linux/clk/analogbits-wrpll-cln28hpc.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) + +/* COREPLLCFG1 */ +#define PRCI_COREPLLCFG1_OFFSET 0x8 +#define PRCI_COREPLLCFG1_CKE_SHIFT 31 +#define PRCI_COREPLLCFG1_CKE_MASK (0x1 << PRCI_COREPLLCFG1_CKE_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 31 +#define PRCI_DDRPLLCFG1_CKE_MASK (0x1 << PRCI_DDRPLLCFG1_CKE_SHIFT) + +/* PCIEAUXCFG1 */ +#define PRCI_PCIEAUXCFG1_OFFSET 0x14 +#define PRCI_PCIEAUXCFG1_SHIFT 0 +#define PRCI_PCIEAUXCFG1_MASK (0x1 << PRCI_PCIEAUXCFG1_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 31 +#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_DEVICERESETCNT 6 + +/* 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) + +/* CLTXPLLCFG0 */ +#define PRCI_CLTXPLLCFG0_OFFSET 0x30 +#define PRCI_CLTXPLLCFG0_DIVR_SHIFT 0 +#define PRCI_CLTXPLLCFG0_DIVR_MASK (0x3f << PRCI_CLTXPLLCFG0_DIVR_SHIFT) +#define PRCI_CLTXPLLCFG0_DIVF_SHIFT 6 +#define PRCI_CLTXPLLCFG0_DIVF_MASK (0x1ff << PRCI_CLTXPLLCFG0_DIVF_SHIFT) +#define PRCI_CLTXPLLCFG0_DIVQ_SHIFT 15 +#define PRCI_CLTXPLLCFG0_DIVQ_MASK (0x7 << PRCI_CLTXPLLCFG0_DIVQ_SHIFT) +#define PRCI_CLTXPLLCFG0_RANGE_SHIFT 18 +#define PRCI_CLTXPLLCFG0_RANGE_MASK (0x7 << PRCI_CLTXPLLCFG0_RANGE_SHIFT) +#define PRCI_CLTXPLLCFG0_BYPASS_SHIFT 24 +#define PRCI_CLTXPLLCFG0_BYPASS_MASK (0x1 << PRCI_CLTXPLLCFG0_BYPASS_SHIFT) +#define PRCI_CLTXPLLCFG0_FSE_SHIFT 25 +#define PRCI_CLTXPLLCFG0_FSE_MASK (0x1 << PRCI_CLTXPLLCFG0_FSE_SHIFT) +#define PRCI_CLTXPLLCFG0_LOCK_SHIFT 31 +#define PRCI_CLTXPLLCFG0_LOCK_MASK (0x1 << PRCI_CLTXPLLCFG0_LOCK_SHIFT) + +/* CLTXPLLCFG1 */ +#define PRCI_CLTXPLLCFG1_OFFSET 0x34 +#define PRCI_CLTXPLLCFG1_CKE_SHIFT 24 +#define PRCI_CLTXPLLCFG1_CKE_MASK (0x1 << PRCI_CLTXPLLCFG1_CKE_SHIFT) + +/* DVFSCOREPLLCFG0 */ +#define PRCI_DVFSCOREPLLCFG0_OFFSET 0x38 + +/* DVFSCOREPLLCFG1 */ +#define PRCI_DVFSCOREPLLCFG1_OFFSET 0x3c +#define PRCI_DVFSCOREPLLCFG1_CKE_SHIFT 24 +#define PRCI_DVFSCOREPLLCFG1_CKE_MASK (0x1 << PRCI_DVFSCOREPLLCFG1_CKE_SHIFT) + +/* COREPLLSEL */ +#define PRCI_COREPLLSEL_OFFSET 0x40 +#define PRCI_COREPLLSEL_COREPLLSEL_SHIFT 0 +#define PRCI_COREPLLSEL_COREPLLSEL_MASK \ + (0x1 << PRCI_COREPLLSEL_COREPLLSEL_SHIFT) + +/* HFPCLKPLLCFG0 */ +#define PRCI_HFPCLKPLLCFG0_OFFSET 0x50 +#define PRCI_HFPCLKPLL_CFG0_DIVR_SHIFT 0 +#define PRCI_HFPCLKPLL_CFG0_DIVR_MASK \ + (0x3f << PRCI_HFPCLKPLLCFG0_DIVR_SHIFT) +#define PRCI_HFPCLKPLL_CFG0_DIVF_SHIFT 6 +#define PRCI_HFPCLKPLL_CFG0_DIVF_MASK \ + (0x1ff << PRCI_HFPCLKPLLCFG0_DIVF_SHIFT) +#define PRCI_HFPCLKPLL_CFG0_DIVQ_SHIFT 15 +#define PRCI_HFPCLKPLL_CFG0_DIVQ_MASK \ + (0x7 << PRCI_HFPCLKPLLCFG0_DIVQ_SHIFT) +#define PRCI_HFPCLKPLL_CFG0_RANGE_SHIFT 18 +#define PRCI_HFPCLKPLL_CFG0_RANGE_MASK \ + (0x7 << PRCI_HFPCLKPLLCFG0_RANGE_SHIFT) +#define PRCI_HFPCLKPLL_CFG0_BYPASS_SHIFT 24 +#define PRCI_HFPCLKPLL_CFG0_BYPASS_MASK \ + (0x1 << PRCI_HFPCLKPLLCFG0_BYPASS_SHIFT) +#define PRCI_HFPCLKPLL_CFG0_FSE_SHIFT 25 +#define PRCI_HFPCLKPLL_CFG0_FSE_MASK \ + (0x1 << PRCI_HFPCLKPLLCFG0_FSE_SHIFT) +#define PRCI_HFPCLKPLL_CFG0_LOCK_SHIFT 31 +#define PRCI_HFPCLKPLL_CFG0_LOCK_MASK \ + (0x1 << PRCI_HFPCLKPLLCFG0_LOCK_SHIFT) + +/* HFPCLKPLLCFG1 */ +#define PRCI_HFPCLKPLLCFG1_OFFSET 0x54 +#define PRCI_HFPCLKPLLCFG1_CKE_SHIFT 24 +#define PRCI_HFPCLKPLLCFG1_CKE_MASK \ + (0x1 << PRCI_HFPCLKPLLCFG1_CKE_SHIFT) + +/* HFPCLKPLLSEL */ +#define PRCI_HFPCLKPLLSEL_OFFSET 0x58 +#define PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_SHIFT 0 +#define PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_MASK \ + (0x1 << PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_SHIFT) + +/* HFPCLKPLLDIV */ +#define PRCI_HFPCLKPLLDIV_OFFSET 0x5c + +/* PRCIPLL */ +#define PRCI_PRCIPLL_OFFSET 0xe0 + +#define PRCI_PRCIPLL_CLTXPLL (0x1 << 0) +#define PRCI_PRCIPLL_GEMGXLPLL (0x1 << 1) +#define PRCI_PRCIPLL_DDRPLL (0x1 << 2) +#define PRCI_PRCIPLL_HFPCLKPLL (0x1 << 3) +#define PRCI_PRCIPLL_DVFSCOREPLL (0x1 << 4) +#define PRCI_PRCIPLL_COREPLL (0x1 << 5) + +/* PROCMONCFG */ +#define PRCI_PROCMONCFG_OFFSET 0xF0 +#define PRCI_PROCMONCFG_CORE_CLOCK_SHIFT 24 +#define PRCI_PROCMONCFG_CORE_CLOCK_MASK \ + (0x1 << PRCI_PROCMONCFG_CORE_CLOCK_SHIFT) + +/* + * Private structures + */ + +/** + * struct __prci_data - per-device-instance data + * @va: base virtual address of the PRCI IP block + * @parent: parent clk instance + * + * PRCI per-device instance data + */ +struct __prci_data { + void *va; + struct clk parent_hfclk; + struct clk parent_rtcclk; +}; + +/** + * 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 + * @cfg1_offs: WRPLL CFG1 register offset (in bytes) from the PRCI base address + * @release_reset: fn ptr to code to release clock reset + * + * @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; + u8 cfg1_offs; + void (*release_reset)(struct __prci_data *pd); +}; + +/** + * 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 __prci_clock_ops for control + * @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 __prci_clock_ops *ops; + struct __prci_wrpll_data *pwd; + struct __prci_data *pd; +}; + +/* struct __prci_clock_ops - clock operations */ +struct __prci_clock_ops { + int (*set_rate)(struct __prci_clock *pc, + unsigned long rate, + unsigned long parent_rate); + unsigned long (*round_rate)(struct __prci_clock *pc, + unsigned long rate, + unsigned long *parent_rate); + unsigned long (*recalc_rate)(struct __prci_clock *pc, + unsigned long parent_rate); + int (*enable_clk)(struct __prci_clock *pc, bool enable); +}; + +/* + * 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; +}; + +void sifive_prci_ethernet_release_reset(struct __prci_data *pd); +void sifive_prci_ddr_release_reset(struct __prci_data *pd); +void sifive_prci_cltx_release_reset(struct __prci_data *pd); + +/* Core clock mux control */ +void sifive_prci_coreclksel_use_hfclk(struct __prci_data *pd); +void sifive_prci_coreclksel_use_corepll(struct __prci_data *pd); +void sifive_prci_coreclksel_use_final_corepll(struct __prci_data *pd); +void sifive_prci_corepllsel_use_dvfscorepll(struct __prci_data *pd); +void sifive_prci_corepllsel_use_corepll(struct __prci_data *pd); +void sifive_prci_hfpclkpllsel_use_hfclk(struct __prci_data *pd); +void sifive_prci_hfpclkpllsel_use_hfpclkpll(struct __prci_data *pd); + +unsigned long sifive_prci_wrpll_round_rate(struct __prci_clock *pc, + unsigned long rate, + unsigned long *parent_rate); + +/* Linux clock framework integration */ +int sifive_prci_wrpll_set_rate(struct __prci_clock *pc, + unsigned long rate, + unsigned long parent_rate); + +unsigned long sifive_prci_wrpll_recalc_rate(struct __prci_clock *pc, + unsigned long parent_rate); + +unsigned long sifive_prci_tlclksel_recalc_rate(struct __prci_clock *pc, + unsigned long parent_rate); + +unsigned long sifive_prci_hfpclkplldiv_recalc_rate(struct __prci_clock *pc, + unsigned long parent_rate); + +int sifive_prci_clock_enable(struct __prci_clock *pc, bool enable); + +#endif /* __SIFIVE_CLK_SIFIVE_PRCI_H */