Signed-off-by: Steffen Trumtrar <[email protected]> --- drivers/clk/socfpga/Makefile | 2 + drivers/clk/socfpga/clk-gate-a10.c | 197 +++++++++++++++++++++++++++++++++++ drivers/clk/socfpga/clk-periph-a10.c | 130 +++++++++++++++++++++++ drivers/clk/socfpga/clk-pll-a10.c | 143 +++++++++++++++++++++++++ drivers/clk/socfpga/clk.c | 11 +- drivers/clk/socfpga/clk.h | 90 ++++++++++++++++ 6 files changed, 572 insertions(+), 1 deletion(-) create mode 100644 drivers/clk/socfpga/clk-gate-a10.c create mode 100644 drivers/clk/socfpga/clk-periph-a10.c create mode 100644 drivers/clk/socfpga/clk-pll-a10.c create mode 100644 drivers/clk/socfpga/clk.h
diff --git a/drivers/clk/socfpga/Makefile b/drivers/clk/socfpga/Makefile index fc216adb744e..341e6433e560 100644 --- a/drivers/clk/socfpga/Makefile +++ b/drivers/clk/socfpga/Makefile @@ -1 +1,3 @@ obj-y += clk.o + +obj-$(CONFIG_ARCH_SOCFPGA_ARRIA10) += clk-gate-a10.o clk-periph-a10.o clk-pll-a10.o diff --git a/drivers/clk/socfpga/clk-gate-a10.c b/drivers/clk/socfpga/clk-gate-a10.c new file mode 100644 index 000000000000..07f6026c2e8d --- /dev/null +++ b/drivers/clk/socfpga/clk-gate-a10.c @@ -0,0 +1,197 @@ +/* + * Copyright (C) 2015 Altera Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <common.h> +#include <io.h> +#include <malloc.h> +#include <regmap.h> +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <mach/arria10-regs.h> +#include <mach/arria10-system-manager.h> + +#include "clk.h" + +#define to_socfpga_gate_clk(p) container_of(p, struct socfpga_gate_clk, clk) + +/* SDMMC Group for System Manager defines */ +#define SYSMGR_SDMMCGRP_CTRL_OFFSET 0x28 + +static unsigned long socfpga_gate_clk_recalc_rate(struct clk *clk, + unsigned long parent_rate) +{ + struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(clk); + u32 div = 1, val; + + if (socfpgaclk->fixed_div) + div = socfpgaclk->fixed_div; + else if (socfpgaclk->div_reg) { + val = readl(socfpgaclk->div_reg) >> socfpgaclk->shift; + val &= GENMASK(socfpgaclk->width - 1, 0); + div = (1 << val); + } + + return parent_rate / div; +} + +static int socfpga_clk_prepare(struct clk *clk) +{ + struct socfpga_gate_clk *socfpgaclk = to_socfpga_gate_clk(clk); + int i; + u32 hs_timing; + u32 clk_phase[2]; + + if (socfpgaclk->clk_phase[0] || socfpgaclk->clk_phase[1]) { + for (i = 0; i < ARRAY_SIZE(clk_phase); i++) { + switch (socfpgaclk->clk_phase[i]) { + case 0: + clk_phase[i] = 0; + break; + case 45: + clk_phase[i] = 1; + break; + case 90: + clk_phase[i] = 2; + break; + case 135: + clk_phase[i] = 3; + break; + case 180: + clk_phase[i] = 4; + break; + case 225: + clk_phase[i] = 5; + break; + case 270: + clk_phase[i] = 6; + break; + case 315: + clk_phase[i] = 7; + break; + default: + clk_phase[i] = 0; + break; + } + } + + hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1]); + writel(hs_timing, ARRIA10_SYSMGR_SDMMC); + } + return 0; +} + +static int clk_socfpga_enable(struct clk *clk) +{ + struct socfpga_gate_clk *socfpga_clk = to_socfpga_gate_clk(clk); + u32 val; + + socfpga_clk_prepare(clk); + + val = readl(socfpga_clk->reg); + val |= 1 << socfpga_clk->bit_idx; + writel(val, socfpga_clk->reg); + + return 0; +} + +static void clk_socfpga_disable(struct clk *clk) +{ + struct socfpga_gate_clk *socfpga_clk = to_socfpga_gate_clk(clk); + u32 val; + + val = readl(socfpga_clk->reg); + val &= ~(1 << socfpga_clk->shift); + writel(val, socfpga_clk->reg); +} + +static struct clk_ops gateclk_ops = { + .recalc_rate = socfpga_gate_clk_recalc_rate, +}; + +static struct clk *__socfpga_gate_init(struct device_node *node, + const struct clk_ops *ops) +{ + u32 clk_gate[2]; + u32 div_reg[3]; + u32 clk_phase[2]; + u32 fixed_div; + struct socfpga_gate_clk *socfpga_clk; + const char *clk_name = node->name; + int rc; + int i; + + socfpga_clk = xzalloc(sizeof(*socfpga_clk)); + + rc = of_property_read_u32_array(node, "clk-gate", clk_gate, 2); + if (rc) + clk_gate[0] = 0; + + if (clk_gate[0]) { + socfpga_clk->reg = clk_mgr_base_addr + clk_gate[0]; + socfpga_clk->bit_idx = clk_gate[1]; + + gateclk_ops.enable = clk_socfpga_enable; + gateclk_ops.disable = clk_socfpga_disable; + } + + rc = of_property_read_u32(node, "fixed-divider", &fixed_div); + if (rc) + socfpga_clk->fixed_div = 0; + else + socfpga_clk->fixed_div = fixed_div; + + rc = of_property_read_u32_array(node, "div-reg", div_reg, 3); + if (!rc) { + socfpga_clk->div_reg = clk_mgr_base_addr + div_reg[0]; + socfpga_clk->shift = div_reg[1]; + socfpga_clk->width = div_reg[2]; + } else { + socfpga_clk->div_reg = NULL; + } + + rc = of_property_read_u32_array(node, "clk-phase", clk_phase, 2); + if (!rc) { + socfpga_clk->clk_phase[0] = clk_phase[0]; + socfpga_clk->clk_phase[1] = clk_phase[1]; + } + + of_property_read_string(node, "clock-output-names", &clk_name); + + socfpga_clk->clk.name = xstrdup(clk_name); + socfpga_clk->clk.ops = ops; + + for (i = 0; i < SOCFPGA_MAX_PARENTS; i++) { + socfpga_clk->parent_names[i] = of_clk_get_parent_name(node, i); + if (!socfpga_clk->parent_names[i]) + break; + } + + socfpga_clk->clk.num_parents = i; + socfpga_clk->clk.parent_names = socfpga_clk->parent_names; + + rc = clk_register(&socfpga_clk->clk); + if (rc) { + free(socfpga_clk); + return ERR_PTR(rc); + } + + return &socfpga_clk->clk; +} + +struct clk *socfpga_a10_gate_init(struct device_node *node) +{ + return __socfpga_gate_init(node, &gateclk_ops); +} diff --git a/drivers/clk/socfpga/clk-periph-a10.c b/drivers/clk/socfpga/clk-periph-a10.c new file mode 100644 index 000000000000..9dd7fc9c2552 --- /dev/null +++ b/drivers/clk/socfpga/clk-periph-a10.c @@ -0,0 +1,130 @@ +/* + * Copyright (C) 2015 Altera Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <common.h> +#include <io.h> +#include <malloc.h> +#include <linux/clk.h> +#include <linux/clkdev.h> + +#include "clk.h" + +#define CLK_MGR_FREE_SHIFT 16 +#define CLK_MGR_FREE_MASK 0x7 + +#define SOCFPGA_MPU_FREE_CLK "mpu_free_clk" +#define SOCFPGA_NOC_FREE_CLK "noc_free_clk" +#define SOCFPGA_SDMMC_FREE_CLK "sdmmc_free_clk" +#define to_socfpga_periph_clk(p) container_of(p, struct socfpga_periph_clk, clk) + +static unsigned long clk_periclk_recalc_rate(struct clk *clk, + unsigned long parent_rate) +{ + struct socfpga_periph_clk *socfpgaclk = to_socfpga_periph_clk(clk); + u32 div; + + if (socfpgaclk->fixed_div) { + div = socfpgaclk->fixed_div; + } else if (socfpgaclk->div_reg) { + div = readl(socfpgaclk->div_reg) >> socfpgaclk->shift; + div &= GENMASK(socfpgaclk->width - 1, 0); + div += 1; + } else { + div = ((readl(socfpgaclk->reg) & 0x7ff) + 1); + } + + return parent_rate / div; +} + +static int clk_periclk_get_parent(struct clk *clk) +{ + struct socfpga_periph_clk *socfpgaclk = to_socfpga_periph_clk(clk); + u32 clk_src; + + clk_src = readl(socfpgaclk->reg); + if (streq(clk->name, SOCFPGA_MPU_FREE_CLK) || + streq(clk->name, SOCFPGA_NOC_FREE_CLK) || + streq(clk->name, SOCFPGA_SDMMC_FREE_CLK)) + return (clk_src >> CLK_MGR_FREE_SHIFT) & + CLK_MGR_FREE_MASK; + else + return 0; +} + +static const struct clk_ops periclk_ops = { + .recalc_rate = clk_periclk_recalc_rate, + .get_parent = clk_periclk_get_parent, +}; + +static struct clk *__socfpga_periph_init(struct device_node *node, + const struct clk_ops *ops) +{ + u32 reg; + struct socfpga_periph_clk *periph_clk; + const char *clk_name = node->name; + int rc; + u32 fixed_div; + u32 div_reg[3]; + int i; + + of_property_read_u32(node, "reg", ®); + + periph_clk = xzalloc(sizeof(*periph_clk)); + + periph_clk->reg = clk_mgr_base_addr + reg; + + rc = of_property_read_u32_array(node, "div-reg", div_reg, 3); + if (!rc) { + periph_clk->div_reg = clk_mgr_base_addr + div_reg[0]; + periph_clk->shift = div_reg[1]; + periph_clk->width = div_reg[2]; + } else { + periph_clk->div_reg = NULL; + } + + rc = of_property_read_u32(node, "fixed-divider", &fixed_div); + if (rc) + periph_clk->fixed_div = 0; + else + periph_clk->fixed_div = fixed_div; + + of_property_read_string(node, "clock-output-names", &clk_name); + + for (i = 0; i < SOCFPGA_MAX_PARENTS; i++) { + periph_clk->parent_names[i] = of_clk_get_parent_name(node, i); + if (!periph_clk->parent_names[i]) + break; + } + + periph_clk->clk.num_parents = i; + periph_clk->clk.parent_names = periph_clk->parent_names; + + periph_clk->clk.name = xstrdup(clk_name); + periph_clk->clk.ops = ops; + + rc = clk_register(&periph_clk->clk); + if (rc) { + free(periph_clk); + return ERR_PTR(rc); + } + + return &periph_clk->clk; +} + +struct clk *socfpga_a10_periph_init(struct device_node *node) +{ + return __socfpga_periph_init(node, &periclk_ops); +} diff --git a/drivers/clk/socfpga/clk-pll-a10.c b/drivers/clk/socfpga/clk-pll-a10.c new file mode 100644 index 000000000000..4dae3e537bc2 --- /dev/null +++ b/drivers/clk/socfpga/clk-pll-a10.c @@ -0,0 +1,143 @@ +/* + * Copyright (C) 2015 Altera Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <common.h> +#include <io.h> +#include <malloc.h> +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <asm-generic/div64.h> + +#include "clk.h" + +/* Clock Manager offsets */ +#define CLK_MGR_PLL_CLK_SRC_SHIFT 8 +#define CLK_MGR_PLL_CLK_SRC_MASK 0x3 + +/* Clock bypass bits */ +#define SOCFPGA_PLL_BG_PWRDWN 0 +#define SOCFPGA_PLL_PWR_DOWN 1 +#define SOCFPGA_PLL_EXT_ENA 2 +#define SOCFPGA_PLL_DIVF_MASK 0x00001FFF +#define SOCFPGA_PLL_DIVF_SHIFT 0 +#define SOCFPGA_PLL_DIVQ_MASK 0x003F0000 +#define SOCFPGA_PLL_DIVQ_SHIFT 16 +#define SOCFGPA_MAX_PARENTS 5 + +#define SOCFPGA_MAIN_PLL_CLK "main_pll" +#define SOCFPGA_PERIP_PLL_CLK "periph_pll" + +#define to_socfpga_clk(p) container_of(p, struct socfpga_pll, clk) + +static unsigned long clk_pll_recalc_rate(struct clk *clk, + unsigned long parent_rate) +{ + struct socfpga_pll *socfpgaclk = to_socfpga_clk(clk); + unsigned long divf, divq, reg; + unsigned long long vco_freq; + + /* read VCO1 reg for numerator and denominator */ + reg = readl(socfpgaclk->reg + 0x4); + divf = (reg & SOCFPGA_PLL_DIVF_MASK) >> SOCFPGA_PLL_DIVF_SHIFT; + divq = (reg & SOCFPGA_PLL_DIVQ_MASK) >> SOCFPGA_PLL_DIVQ_SHIFT; + vco_freq = (unsigned long long)parent_rate * (divf + 1); + do_div(vco_freq, (1 + divq)); + return (unsigned long)vco_freq; +} + +static int clk_pll_get_parent(struct clk *clk) +{ + struct socfpga_pll *socfpgaclk = to_socfpga_clk(clk); + u32 pll_src; + + pll_src = readl(socfpgaclk->reg); + + return (pll_src >> CLK_MGR_PLL_CLK_SRC_SHIFT) & + CLK_MGR_PLL_CLK_SRC_MASK; +} + +static int clk_socfpga_enable(struct clk *clk) +{ + struct socfpga_pll *socfpga_clk = to_socfpga_clk(clk); + u32 val; + + val = readl(socfpga_clk->reg); + val |= 1 << socfpga_clk->bit_idx; + writel(val, socfpga_clk->reg); + + return 0; +} + +static void clk_socfpga_disable(struct clk *clk) +{ + struct socfpga_pll *socfpga_clk = to_socfpga_clk(clk); + u32 val; + + val = readl(socfpga_clk->reg); + val &= ~(1 << socfpga_clk->bit_idx); + writel(val, socfpga_clk->reg); +} + +static struct clk_ops clk_pll_ops = { + .recalc_rate = clk_pll_recalc_rate, + .get_parent = clk_pll_get_parent, +}; + +static struct clk *__socfpga_pll_init(struct device_node *node, + const struct clk_ops *ops) +{ + u32 reg; + struct socfpga_pll *pll_clk; + const char *clk_name = node->name; + int rc; + int i; + + of_property_read_u32(node, "reg", ®); + + pll_clk = xzalloc(sizeof(*pll_clk)); + + pll_clk->reg = clk_mgr_base_addr + reg; + + of_property_read_string(node, "clock-output-names", &clk_name); + + pll_clk->clk.name = xstrdup(clk_name); + pll_clk->clk.ops = ops; + + for (i = 0; i < SOCFPGA_MAX_PARENTS; i++) { + pll_clk->parent_names[i] = of_clk_get_parent_name(node, i); + if (!pll_clk->parent_names[i]) + break; + } + + pll_clk->bit_idx = SOCFPGA_PLL_EXT_ENA; + pll_clk->clk.num_parents = i; + pll_clk->clk.parent_names = pll_clk->parent_names; + + clk_pll_ops.enable = clk_socfpga_enable; + clk_pll_ops.disable = clk_socfpga_disable; + + rc = clk_register(&pll_clk->clk); + if (rc) { + free(pll_clk); + return NULL; + } + + return &pll_clk->clk; +} + +struct clk *socfpga_a10_pll_init(struct device_node *node) +{ + return __socfpga_pll_init(node, &clk_pll_ops); +} diff --git a/drivers/clk/socfpga/clk.c b/drivers/clk/socfpga/clk.c index 6af0632cafc2..ade608ffe314 100644 --- a/drivers/clk/socfpga/clk.c +++ b/drivers/clk/socfpga/clk.c @@ -12,6 +12,7 @@ */ #include <common.h> +#include <debug_ll.h> #include <init.h> #include <driver.h> #include <linux/clk.h> @@ -20,6 +21,8 @@ #include <linux/clkdev.h> #include <linux/err.h> +#include "clk.h" + /* Clock Manager offsets */ #define CLKMGR_CTRL 0x0 #define CLKMGR_BYPASS 0x4 @@ -52,7 +55,7 @@ #define div_mask(width) ((1 << (width)) - 1) #define streq(a, b) (strcmp((a), (b)) == 0) -static void __iomem *clk_mgr_base_addr; +void __iomem *clk_mgr_base_addr; struct clk_pll { struct clk clk; @@ -385,6 +388,12 @@ static void socfpga_register_clocks(struct device_d *dev, struct device_node *no clk = socfpga_periph_clk(node); else if (of_device_is_compatible(node, "altr,socfpga-gate-clk")) clk = socfpga_gate_clk(node); + else if (of_device_is_compatible(node, "altr,socfpga-a10-pll-clock")) + clk = socfpga_a10_pll_init(node); + else if (of_device_is_compatible(node, "altr,socfpga-a10-perip-clk")) + clk = socfpga_a10_periph_init(node); + else if (of_device_is_compatible(node, "altr,socfpga-a10-gate-clk")) + clk = socfpga_a10_gate_init(node); else return; diff --git a/drivers/clk/socfpga/clk.h b/drivers/clk/socfpga/clk.h new file mode 100644 index 000000000000..6d6c28344df4 --- /dev/null +++ b/drivers/clk/socfpga/clk.h @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2013, Steffen Trumtrar <[email protected]> + * + * based on drivers/clk/tegra/clk.h + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + */ + +#ifndef __SOCFPGA_CLK_H +#define __SOCFPGA_CLK_H + +#include <linux/clk.h> + +/* Clock Manager offsets */ +#define CLKMGR_CTRL 0x0 +#define CLKMGR_BYPASS 0x4 +#define CLKMGR_DBCTRL 0x10 +#define CLKMGR_L4SRC 0x70 +#define CLKMGR_PERPLL_SRC 0xAC + +#define SOCFPGA_MAX_PARENTS 5 + +#define streq(a, b) (strcmp((a), (b)) == 0) + +extern void __iomem *clk_mgr_base_addr; + +void __init socfpga_pll_init(struct device_node *node); +void __init socfpga_periph_init(struct device_node *node); +void __init socfpga_gate_init(struct device_node *node); + +#ifdef CONFIG_ARCH_SOCFPGA_ARRIA10 +struct clk *socfpga_a10_pll_init(struct device_node *node); +struct clk *socfpga_a10_periph_init(struct device_node *node); +struct clk *socfpga_a10_gate_init(struct device_node *node); +#else +struct clk *socfpga_a10_pll_init(struct device_node *node) +{ + return ERR_PTR(-ENOSYS); +} +struct clk *socfpga_a10_periph_init(struct device_node *node) +{ + return ERR_PTR(-ENOSYS); +} +struct clk *socfpga_a10_gate_init(struct device_node *node) +{ + return ERR_PTR(-ENOSYS); +} +#endif + +struct socfpga_pll { + struct clk clk; + void __iomem *reg; + u32 bit_idx; + const char *parent_names[SOCFPGA_MAX_PARENTS]; +}; + +struct socfpga_gate_clk { + struct clk clk; + char *parent_name; + u32 fixed_div; + void __iomem *div_reg; + struct regmap *sys_mgr_base_addr; + u32 width; /* only valid if div_reg != 0 */ + u32 shift; /* only valid if div_reg != 0 */ + u32 bit_idx; + void __iomem *reg; + u32 clk_phase[2]; + const char *parent_names[SOCFPGA_MAX_PARENTS]; +}; + +struct socfpga_periph_clk { + struct clk clk; + void __iomem *reg; + char *parent_name; + u32 fixed_div; + void __iomem *div_reg; + u32 width; /* only valid if div_reg != 0 */ + u32 shift; /* only valid if div_reg != 0 */ + const char *parent_names[SOCFPGA_MAX_PARENTS]; +}; + +#endif /* SOCFPGA_CLK_H */ -- 2.11.0 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
