diff options
Diffstat (limited to 'drivers/clk/ingenic')
| -rw-r--r-- | drivers/clk/ingenic/Kconfig | 86 | ||||
| -rw-r--r-- | drivers/clk/ingenic/Makefile | 10 | ||||
| -rw-r--r-- | drivers/clk/ingenic/cgu.c | 827 | ||||
| -rw-r--r-- | drivers/clk/ingenic/cgu.h | 239 | ||||
| -rw-r--r-- | drivers/clk/ingenic/jz4725b-cgu.c | 273 | ||||
| -rw-r--r-- | drivers/clk/ingenic/jz4740-cgu.c | 271 | ||||
| -rw-r--r-- | drivers/clk/ingenic/jz4760-cgu.c | 446 | ||||
| -rw-r--r-- | drivers/clk/ingenic/jz4770-cgu.c | 463 | ||||
| -rw-r--r-- | drivers/clk/ingenic/jz4780-cgu.c | 808 | ||||
| -rw-r--r-- | drivers/clk/ingenic/pm.c | 45 | ||||
| -rw-r--r-- | drivers/clk/ingenic/pm.h | 12 | ||||
| -rw-r--r-- | drivers/clk/ingenic/tcu.c | 493 | ||||
| -rw-r--r-- | drivers/clk/ingenic/x1000-cgu.c | 495 | ||||
| -rw-r--r-- | drivers/clk/ingenic/x1830-cgu.c | 472 |
14 files changed, 4940 insertions, 0 deletions
diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig new file mode 100644 index 000000000..898f1bc47 --- /dev/null +++ b/drivers/clk/ingenic/Kconfig @@ -0,0 +1,86 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "Ingenic SoCs drivers" + depends on MIPS || COMPILE_TEST + +config INGENIC_CGU_COMMON + bool + +config INGENIC_CGU_JZ4740 + bool "Ingenic JZ4740 CGU driver" + default MACH_JZ4740 + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic JZ4740 + and compatible SoCs. + + If building for a JZ4740 SoC, you want to say Y here. + +config INGENIC_CGU_JZ4725B + bool "Ingenic JZ4725B CGU driver" + default MACH_JZ4725B + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic JZ4725B + and compatible SoCs. + + If building for a JZ4725B SoC, you want to say Y here. + +config INGENIC_CGU_JZ4760 + bool "Ingenic JZ4760 CGU driver" + default MACH_JZ4760 + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic JZ4760 + and compatible SoCs. + + If building for a JZ4760 SoC, you want to say Y here. + +config INGENIC_CGU_JZ4770 + bool "Ingenic JZ4770 CGU driver" + default MACH_JZ4770 + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic JZ4770 + and compatible SoCs. + + If building for a JZ4770 SoC, you want to say Y here. + +config INGENIC_CGU_JZ4780 + bool "Ingenic JZ4780 CGU driver" + default MACH_JZ4780 + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic JZ4780 + and compatible SoCs. + + If building for a JZ4780 SoC, you want to say Y here. + +config INGENIC_CGU_X1000 + bool "Ingenic X1000 CGU driver" + default MACH_X1000 + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic X1000 + and compatible SoCs. + + If building for a X1000 SoC, you want to say Y here. + +config INGENIC_CGU_X1830 + bool "Ingenic X1830 CGU driver" + default MACH_X1830 + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic X1830 + and compatible SoCs. + + If building for a X1830 SoC, you want to say Y here. + +config INGENIC_TCU_CLK + bool "Ingenic JZ47xx TCU clocks driver" + default MACH_INGENIC + select MFD_SYSCON + help + Support the clocks of the Timer/Counter Unit (TCU) of the Ingenic + JZ47xx SoCs. + +endmenu diff --git a/drivers/clk/ingenic/Makefile b/drivers/clk/ingenic/Makefile new file mode 100644 index 000000000..9edfaf461 --- /dev/null +++ b/drivers/clk/ingenic/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_INGENIC_CGU_COMMON) += cgu.o pm.o +obj-$(CONFIG_INGENIC_CGU_JZ4740) += jz4740-cgu.o +obj-$(CONFIG_INGENIC_CGU_JZ4725B) += jz4725b-cgu.o +obj-$(CONFIG_INGENIC_CGU_JZ4760) += jz4760-cgu.o +obj-$(CONFIG_INGENIC_CGU_JZ4770) += jz4770-cgu.o +obj-$(CONFIG_INGENIC_CGU_JZ4780) += jz4780-cgu.o +obj-$(CONFIG_INGENIC_CGU_X1000) += x1000-cgu.o +obj-$(CONFIG_INGENIC_CGU_X1830) += x1830-cgu.o +obj-$(CONFIG_INGENIC_TCU_CLK) += tcu.o diff --git a/drivers/clk/ingenic/cgu.c b/drivers/clk/ingenic/cgu.c new file mode 100644 index 000000000..861c50d6c --- /dev/null +++ b/drivers/clk/ingenic/cgu.c @@ -0,0 +1,827 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Ingenic SoC CGU driver + * + * Copyright (c) 2013-2015 Imagination Technologies + * Author: Paul Burton <paul.burton@mips.com> + */ + +#include <linux/bitops.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/math64.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/time.h> + +#include "cgu.h" + +#define MHZ (1000 * 1000) + +static inline const struct ingenic_cgu_clk_info * +to_clk_info(struct ingenic_clk *clk) +{ + return &clk->cgu->clock_info[clk->idx]; +} + +/** + * ingenic_cgu_gate_get() - get the value of clock gate register bit + * @cgu: reference to the CGU whose registers should be read + * @info: info struct describing the gate bit + * + * Retrieves the state of the clock gate bit described by info. The + * caller must hold cgu->lock. + * + * Return: true if the gate bit is set, else false. + */ +static inline bool +ingenic_cgu_gate_get(struct ingenic_cgu *cgu, + const struct ingenic_cgu_gate_info *info) +{ + return !!(readl(cgu->base + info->reg) & BIT(info->bit)) + ^ info->clear_to_gate; +} + +/** + * ingenic_cgu_gate_set() - set the value of clock gate register bit + * @cgu: reference to the CGU whose registers should be modified + * @info: info struct describing the gate bit + * @val: non-zero to gate a clock, otherwise zero + * + * Sets the given gate bit in order to gate or ungate a clock. + * + * The caller must hold cgu->lock. + */ +static inline void +ingenic_cgu_gate_set(struct ingenic_cgu *cgu, + const struct ingenic_cgu_gate_info *info, bool val) +{ + u32 clkgr = readl(cgu->base + info->reg); + + if (val ^ info->clear_to_gate) + clkgr |= BIT(info->bit); + else + clkgr &= ~BIT(info->bit); + + writel(clkgr, cgu->base + info->reg); +} + +/* + * PLL operations + */ + +static unsigned long +ingenic_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + const struct ingenic_cgu_pll_info *pll_info; + unsigned m, n, od_enc, od; + bool bypass; + u32 ctl; + + BUG_ON(clk_info->type != CGU_CLK_PLL); + pll_info = &clk_info->pll; + + ctl = readl(cgu->base + pll_info->reg); + + m = (ctl >> pll_info->m_shift) & GENMASK(pll_info->m_bits - 1, 0); + m += pll_info->m_offset; + n = (ctl >> pll_info->n_shift) & GENMASK(pll_info->n_bits - 1, 0); + n += pll_info->n_offset; + od_enc = ctl >> pll_info->od_shift; + od_enc &= GENMASK(pll_info->od_bits - 1, 0); + + if (pll_info->bypass_bit >= 0) { + ctl = readl(cgu->base + pll_info->bypass_reg); + + bypass = !!(ctl & BIT(pll_info->bypass_bit)); + + if (bypass) + return parent_rate; + } + + for (od = 0; od < pll_info->od_max; od++) { + if (pll_info->od_encoding[od] == od_enc) + break; + } + BUG_ON(od == pll_info->od_max); + od++; + + return div_u64((u64)parent_rate * m * pll_info->rate_multiplier, + n * od); +} + +static void +ingenic_pll_calc_m_n_od(const struct ingenic_cgu_pll_info *pll_info, + unsigned long rate, unsigned long parent_rate, + unsigned int *pm, unsigned int *pn, unsigned int *pod) +{ + unsigned int m, n, od = 1; + + /* + * The frequency after the input divider must be between 10 and 50 MHz. + * The highest divider yields the best resolution. + */ + n = parent_rate / (10 * MHZ); + n = min_t(unsigned int, n, 1 << pll_info->n_bits); + n = max_t(unsigned int, n, pll_info->n_offset); + + m = (rate / MHZ) * od * n / (parent_rate / MHZ); + m = min_t(unsigned int, m, 1 << pll_info->m_bits); + m = max_t(unsigned int, m, pll_info->m_offset); + + *pm = m; + *pn = n; + *pod = od; +} + +static unsigned long +ingenic_pll_calc(const struct ingenic_cgu_clk_info *clk_info, + unsigned long rate, unsigned long parent_rate, + unsigned int *pm, unsigned int *pn, unsigned int *pod) +{ + const struct ingenic_cgu_pll_info *pll_info = &clk_info->pll; + unsigned int m, n, od; + + if (pll_info->calc_m_n_od) + (*pll_info->calc_m_n_od)(pll_info, rate, parent_rate, &m, &n, &od); + else + ingenic_pll_calc_m_n_od(pll_info, rate, parent_rate, &m, &n, &od); + + if (pm) + *pm = m; + if (pn) + *pn = n; + if (pod) + *pod = od; + + return div_u64((u64)parent_rate * m * pll_info->rate_multiplier, + n * od); +} + +static long +ingenic_pll_round_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long *prate) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + + return ingenic_pll_calc(clk_info, req_rate, *prate, NULL, NULL, NULL); +} + +static inline int ingenic_pll_check_stable(struct ingenic_cgu *cgu, + const struct ingenic_cgu_pll_info *pll_info) +{ + u32 ctl; + + return readl_poll_timeout(cgu->base + pll_info->reg, ctl, + ctl & BIT(pll_info->stable_bit), + 0, 100 * USEC_PER_MSEC); +} + +static int +ingenic_pll_set_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long parent_rate) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + const struct ingenic_cgu_pll_info *pll_info = &clk_info->pll; + unsigned long rate, flags; + unsigned int m, n, od; + int ret = 0; + u32 ctl; + + rate = ingenic_pll_calc(clk_info, req_rate, parent_rate, + &m, &n, &od); + if (rate != req_rate) + pr_info("ingenic-cgu: request '%s' rate %luHz, actual %luHz\n", + clk_info->name, req_rate, rate); + + spin_lock_irqsave(&cgu->lock, flags); + ctl = readl(cgu->base + pll_info->reg); + + ctl &= ~(GENMASK(pll_info->m_bits - 1, 0) << pll_info->m_shift); + ctl |= (m - pll_info->m_offset) << pll_info->m_shift; + + ctl &= ~(GENMASK(pll_info->n_bits - 1, 0) << pll_info->n_shift); + ctl |= (n - pll_info->n_offset) << pll_info->n_shift; + + ctl &= ~(GENMASK(pll_info->od_bits - 1, 0) << pll_info->od_shift); + ctl |= pll_info->od_encoding[od - 1] << pll_info->od_shift; + + writel(ctl, cgu->base + pll_info->reg); + + /* If the PLL is enabled, verify that it's stable */ + if (ctl & BIT(pll_info->enable_bit)) + ret = ingenic_pll_check_stable(cgu, pll_info); + + spin_unlock_irqrestore(&cgu->lock, flags); + + return ret; +} + +static int ingenic_pll_enable(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + const struct ingenic_cgu_pll_info *pll_info = &clk_info->pll; + unsigned long flags; + int ret; + u32 ctl; + + spin_lock_irqsave(&cgu->lock, flags); + if (pll_info->bypass_bit >= 0) { + ctl = readl(cgu->base + pll_info->bypass_reg); + + ctl &= ~BIT(pll_info->bypass_bit); + + writel(ctl, cgu->base + pll_info->bypass_reg); + } + + ctl = readl(cgu->base + pll_info->reg); + + ctl |= BIT(pll_info->enable_bit); + + writel(ctl, cgu->base + pll_info->reg); + + ret = ingenic_pll_check_stable(cgu, pll_info); + spin_unlock_irqrestore(&cgu->lock, flags); + + return ret; +} + +static void ingenic_pll_disable(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + const struct ingenic_cgu_pll_info *pll_info = &clk_info->pll; + unsigned long flags; + u32 ctl; + + spin_lock_irqsave(&cgu->lock, flags); + ctl = readl(cgu->base + pll_info->reg); + + ctl &= ~BIT(pll_info->enable_bit); + + writel(ctl, cgu->base + pll_info->reg); + spin_unlock_irqrestore(&cgu->lock, flags); +} + +static int ingenic_pll_is_enabled(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + const struct ingenic_cgu_pll_info *pll_info = &clk_info->pll; + u32 ctl; + + ctl = readl(cgu->base + pll_info->reg); + + return !!(ctl & BIT(pll_info->enable_bit)); +} + +static const struct clk_ops ingenic_pll_ops = { + .recalc_rate = ingenic_pll_recalc_rate, + .round_rate = ingenic_pll_round_rate, + .set_rate = ingenic_pll_set_rate, + + .enable = ingenic_pll_enable, + .disable = ingenic_pll_disable, + .is_enabled = ingenic_pll_is_enabled, +}; + +/* + * Operations for all non-PLL clocks + */ + +static u8 ingenic_clk_get_parent(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + u32 reg; + u8 i, hw_idx, idx = 0; + + if (clk_info->type & CGU_CLK_MUX) { + reg = readl(cgu->base + clk_info->mux.reg); + hw_idx = (reg >> clk_info->mux.shift) & + GENMASK(clk_info->mux.bits - 1, 0); + + /* + * Convert the hardware index to the parent index by skipping + * over any -1's in the parents array. + */ + for (i = 0; i < hw_idx; i++) { + if (clk_info->parents[i] != -1) + idx++; + } + } + + return idx; +} + +static int ingenic_clk_set_parent(struct clk_hw *hw, u8 idx) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + unsigned long flags; + u8 curr_idx, hw_idx, num_poss; + u32 reg, mask; + + if (clk_info->type & CGU_CLK_MUX) { + /* + * Convert the parent index to the hardware index by adding + * 1 for any -1 in the parents array preceding the given + * index. That is, we want the index of idx'th entry in + * clk_info->parents which does not equal -1. + */ + hw_idx = curr_idx = 0; + num_poss = 1 << clk_info->mux.bits; + for (; hw_idx < num_poss; hw_idx++) { + if (clk_info->parents[hw_idx] == -1) + continue; + if (curr_idx == idx) + break; + curr_idx++; + } + + /* idx should always be a valid parent */ + BUG_ON(curr_idx != idx); + + mask = GENMASK(clk_info->mux.bits - 1, 0); + mask <<= clk_info->mux.shift; + + spin_lock_irqsave(&cgu->lock, flags); + + /* write the register */ + reg = readl(cgu->base + clk_info->mux.reg); + reg &= ~mask; + reg |= hw_idx << clk_info->mux.shift; + writel(reg, cgu->base + clk_info->mux.reg); + + spin_unlock_irqrestore(&cgu->lock, flags); + return 0; + } + + return idx ? -EINVAL : 0; +} + +static unsigned long +ingenic_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + unsigned long rate = parent_rate; + u32 div_reg, div; + u8 parent; + + if (clk_info->type & CGU_CLK_DIV) { + parent = ingenic_clk_get_parent(hw); + + if (!(clk_info->div.bypass_mask & BIT(parent))) { + div_reg = readl(cgu->base + clk_info->div.reg); + div = (div_reg >> clk_info->div.shift) & + GENMASK(clk_info->div.bits - 1, 0); + + if (clk_info->div.div_table) + div = clk_info->div.div_table[div]; + else + div = (div + 1) * clk_info->div.div; + + rate /= div; + } + } else if (clk_info->type & CGU_CLK_FIXDIV) { + rate /= clk_info->fixdiv.div; + } + + return rate; +} + +static unsigned int +ingenic_clk_calc_hw_div(const struct ingenic_cgu_clk_info *clk_info, + unsigned int div) +{ + unsigned int i, best_i = 0, best = (unsigned int)-1; + + for (i = 0; i < (1 << clk_info->div.bits) + && clk_info->div.div_table[i]; i++) { + if (clk_info->div.div_table[i] >= div && + clk_info->div.div_table[i] < best) { + best = clk_info->div.div_table[i]; + best_i = i; + + if (div == best) + break; + } + } + + return best_i; +} + +static unsigned +ingenic_clk_calc_div(struct clk_hw *hw, + const struct ingenic_cgu_clk_info *clk_info, + unsigned long parent_rate, unsigned long req_rate) +{ + unsigned int div, hw_div; + u8 parent; + + parent = ingenic_clk_get_parent(hw); + if (clk_info->div.bypass_mask & BIT(parent)) + return 1; + + /* calculate the divide */ + div = DIV_ROUND_UP(parent_rate, req_rate); + + if (clk_info->div.div_table) { + hw_div = ingenic_clk_calc_hw_div(clk_info, div); + + return clk_info->div.div_table[hw_div]; + } + + /* Impose hardware constraints */ + div = clamp_t(unsigned int, div, clk_info->div.div, + clk_info->div.div << clk_info->div.bits); + + /* + * If the divider value itself must be divided before being written to + * the divider register, we must ensure we don't have any bits set that + * would be lost as a result of doing so. + */ + div = DIV_ROUND_UP(div, clk_info->div.div); + div *= clk_info->div.div; + + return div; +} + +static long +ingenic_clk_round_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long *parent_rate) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + unsigned int div = 1; + + if (clk_info->type & CGU_CLK_DIV) + div = ingenic_clk_calc_div(hw, clk_info, *parent_rate, req_rate); + else if (clk_info->type & CGU_CLK_FIXDIV) + div = clk_info->fixdiv.div; + else if (clk_hw_can_set_rate_parent(hw)) + *parent_rate = req_rate; + + return DIV_ROUND_UP(*parent_rate, div); +} + +static inline int ingenic_clk_check_stable(struct ingenic_cgu *cgu, + const struct ingenic_cgu_clk_info *clk_info) +{ + u32 reg; + + return readl_poll_timeout(cgu->base + clk_info->div.reg, reg, + !(reg & BIT(clk_info->div.busy_bit)), + 0, 100 * USEC_PER_MSEC); +} + +static int +ingenic_clk_set_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long parent_rate) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + unsigned long rate, flags; + unsigned int hw_div, div; + u32 reg, mask; + int ret = 0; + + if (clk_info->type & CGU_CLK_DIV) { + div = ingenic_clk_calc_div(hw, clk_info, parent_rate, req_rate); + rate = DIV_ROUND_UP(parent_rate, div); + + if (rate != req_rate) + return -EINVAL; + + if (clk_info->div.div_table) + hw_div = ingenic_clk_calc_hw_div(clk_info, div); + else + hw_div = ((div / clk_info->div.div) - 1); + + spin_lock_irqsave(&cgu->lock, flags); + reg = readl(cgu->base + clk_info->div.reg); + + /* update the divide */ + mask = GENMASK(clk_info->div.bits - 1, 0); + reg &= ~(mask << clk_info->div.shift); + reg |= hw_div << clk_info->div.shift; + + /* clear the stop bit */ + if (clk_info->div.stop_bit != -1) + reg &= ~BIT(clk_info->div.stop_bit); + + /* set the change enable bit */ + if (clk_info->div.ce_bit != -1) + reg |= BIT(clk_info->div.ce_bit); + + /* update the hardware */ + writel(reg, cgu->base + clk_info->div.reg); + + /* wait for the change to take effect */ + if (clk_info->div.busy_bit != -1) + ret = ingenic_clk_check_stable(cgu, clk_info); + + spin_unlock_irqrestore(&cgu->lock, flags); + return ret; + } + + return -EINVAL; +} + +static int ingenic_clk_enable(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + unsigned long flags; + + if (clk_info->type & CGU_CLK_GATE) { + /* ungate the clock */ + spin_lock_irqsave(&cgu->lock, flags); + ingenic_cgu_gate_set(cgu, &clk_info->gate, false); + spin_unlock_irqrestore(&cgu->lock, flags); + + if (clk_info->gate.delay_us) + udelay(clk_info->gate.delay_us); + } + + return 0; +} + +static void ingenic_clk_disable(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + unsigned long flags; + + if (clk_info->type & CGU_CLK_GATE) { + /* gate the clock */ + spin_lock_irqsave(&cgu->lock, flags); + ingenic_cgu_gate_set(cgu, &clk_info->gate, true); + spin_unlock_irqrestore(&cgu->lock, flags); + } +} + +static int ingenic_clk_is_enabled(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + const struct ingenic_cgu_clk_info *clk_info = to_clk_info(ingenic_clk); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + int enabled = 1; + + if (clk_info->type & CGU_CLK_GATE) + enabled = !ingenic_cgu_gate_get(cgu, &clk_info->gate); + + return enabled; +} + +static const struct clk_ops ingenic_clk_ops = { + .get_parent = ingenic_clk_get_parent, + .set_parent = ingenic_clk_set_parent, + + .recalc_rate = ingenic_clk_recalc_rate, + .round_rate = ingenic_clk_round_rate, + .set_rate = ingenic_clk_set_rate, + + .enable = ingenic_clk_enable, + .disable = ingenic_clk_disable, + .is_enabled = ingenic_clk_is_enabled, +}; + +/* + * Setup functions. + */ + +static int ingenic_register_clock(struct ingenic_cgu *cgu, unsigned idx) +{ + const struct ingenic_cgu_clk_info *clk_info = &cgu->clock_info[idx]; + struct clk_init_data clk_init; + struct ingenic_clk *ingenic_clk = NULL; + struct clk *clk, *parent; + const char *parent_names[4]; + unsigned caps, i, num_possible; + int err = -EINVAL; + + BUILD_BUG_ON(ARRAY_SIZE(clk_info->parents) > ARRAY_SIZE(parent_names)); + + if (clk_info->type == CGU_CLK_EXT) { + clk = of_clk_get_by_name(cgu->np, clk_info->name); + if (IS_ERR(clk)) { + pr_err("%s: no external clock '%s' provided\n", + __func__, clk_info->name); + err = -ENODEV; + goto out; + } + err = clk_register_clkdev(clk, clk_info->name, NULL); + if (err) { + clk_put(clk); + goto out; + } + cgu->clocks.clks[idx] = clk; + return 0; + } + + if (!clk_info->type) { + pr_err("%s: no clock type specified for '%s'\n", __func__, + clk_info->name); + goto out; + } + + ingenic_clk = kzalloc(sizeof(*ingenic_clk), GFP_KERNEL); + if (!ingenic_clk) { + err = -ENOMEM; + goto out; + } + + ingenic_clk->hw.init = &clk_init; + ingenic_clk->cgu = cgu; + ingenic_clk->idx = idx; + + clk_init.name = clk_info->name; + clk_init.flags = clk_info->flags; + clk_init.parent_names = parent_names; + + caps = clk_info->type; + + if (caps & CGU_CLK_DIV) { + caps &= ~CGU_CLK_DIV; + } else if (!(caps & CGU_CLK_CUSTOM)) { + /* pass rate changes to the parent clock */ + clk_init.flags |= CLK_SET_RATE_PARENT; + } + + if (caps & (CGU_CLK_MUX | CGU_CLK_CUSTOM)) { + clk_init.num_parents = 0; + + if (caps & CGU_CLK_MUX) + num_possible = 1 << clk_info->mux.bits; + else + num_possible = ARRAY_SIZE(clk_info->parents); + + for (i = 0; i < num_possible; i++) { + if (clk_info->parents[i] == -1) + continue; + + parent = cgu->clocks.clks[clk_info->parents[i]]; + parent_names[clk_init.num_parents] = + __clk_get_name(parent); + clk_init.num_parents++; + } + + BUG_ON(!clk_init.num_parents); + BUG_ON(clk_init.num_parents > ARRAY_SIZE(parent_names)); + } else { + BUG_ON(clk_info->parents[0] == -1); + clk_init.num_parents = 1; + parent = cgu->clocks.clks[clk_info->parents[0]]; + parent_names[0] = __clk_get_name(parent); + } + + if (caps & CGU_CLK_CUSTOM) { + clk_init.ops = clk_info->custom.clk_ops; + + caps &= ~CGU_CLK_CUSTOM; + + if (caps) { + pr_err("%s: custom clock may not be combined with type 0x%x\n", + __func__, caps); + goto out; + } + } else if (caps & CGU_CLK_PLL) { + clk_init.ops = &ingenic_pll_ops; + + caps &= ~CGU_CLK_PLL; + + if (caps) { + pr_err("%s: PLL may not be combined with type 0x%x\n", + __func__, caps); + goto out; + } + } else { + clk_init.ops = &ingenic_clk_ops; + } + + /* nothing to do for gates or fixed dividers */ + caps &= ~(CGU_CLK_GATE | CGU_CLK_FIXDIV); + + if (caps & CGU_CLK_MUX) { + if (!(caps & CGU_CLK_MUX_GLITCHFREE)) + clk_init.flags |= CLK_SET_PARENT_GATE; + + caps &= ~(CGU_CLK_MUX | CGU_CLK_MUX_GLITCHFREE); + } + + if (caps) { + pr_err("%s: unknown clock type 0x%x\n", __func__, caps); + goto out; + } + + clk = clk_register(NULL, &ingenic_clk->hw); + if (IS_ERR(clk)) { + pr_err("%s: failed to register clock '%s'\n", __func__, + clk_info->name); + err = PTR_ERR(clk); + goto out; + } + + err = clk_register_clkdev(clk, clk_info->name, NULL); + if (err) + goto out; + + cgu->clocks.clks[idx] = clk; +out: + if (err) + kfree(ingenic_clk); + return err; +} + +struct ingenic_cgu * +ingenic_cgu_new(const struct ingenic_cgu_clk_info *clock_info, + unsigned num_clocks, struct device_node *np) +{ + struct ingenic_cgu *cgu; + + cgu = kzalloc(sizeof(*cgu), GFP_KERNEL); + if (!cgu) + goto err_out; + + cgu->base = of_iomap(np, 0); + if (!cgu->base) { + pr_err("%s: failed to map CGU registers\n", __func__); + goto err_out_free; + } + + cgu->np = np; + cgu->clock_info = clock_info; + cgu->clocks.clk_num = num_clocks; + + spin_lock_init(&cgu->lock); + + return cgu; + +err_out_free: + kfree(cgu); +err_out: + return NULL; +} + +int ingenic_cgu_register_clocks(struct ingenic_cgu *cgu) +{ + unsigned i; + int err; + + cgu->clocks.clks = kcalloc(cgu->clocks.clk_num, sizeof(struct clk *), + GFP_KERNEL); + if (!cgu->clocks.clks) { + err = -ENOMEM; + goto err_out; + } + + for (i = 0; i < cgu->clocks.clk_num; i++) { + err = ingenic_register_clock(cgu, i); + if (err) + goto err_out_unregister; + } + + err = of_clk_add_provider(cgu->np, of_clk_src_onecell_get, + &cgu->clocks); + if (err) + goto err_out_unregister; + + return 0; + +err_out_unregister: + for (i = 0; i < cgu->clocks.clk_num; i++) { + if (!cgu->clocks.clks[i]) + continue; + if (cgu->clock_info[i].type & CGU_CLK_EXT) + clk_put(cgu->clocks.clks[i]); + else + clk_unregister(cgu->clocks.clks[i]); + } + kfree(cgu->clocks.clks); +err_out: + return err; +} diff --git a/drivers/clk/ingenic/cgu.h b/drivers/clk/ingenic/cgu.h new file mode 100644 index 000000000..147b7df0d --- /dev/null +++ b/drivers/clk/ingenic/cgu.h @@ -0,0 +1,239 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Ingenic SoC CGU driver + * + * Copyright (c) 2013-2015 Imagination Technologies + * Author: Paul Burton <paul.burton@mips.com> + */ + +#ifndef __DRIVERS_CLK_INGENIC_CGU_H__ +#define __DRIVERS_CLK_INGENIC_CGU_H__ + +#include <linux/bitops.h> +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/spinlock.h> + +/** + * struct ingenic_cgu_pll_info - information about a PLL + * @reg: the offset of the PLL's control register within the CGU + * @rate_multiplier: the multiplier needed by pll rate calculation + * @m_shift: the number of bits to shift the multiplier value by (ie. the + * index of the lowest bit of the multiplier value in the PLL's + * control register) + * @m_bits: the size of the multiplier field in bits + * @m_offset: the multiplier value which encodes to 0 in the PLL's control + * register + * @n_shift: the number of bits to shift the divider value by (ie. the + * index of the lowest bit of the divider value in the PLL's + * control register) + * @n_bits: the size of the divider field in bits + * @n_offset: the divider value which encodes to 0 in the PLL's control + * register + * @od_shift: the number of bits to shift the post-VCO divider value by (ie. + * the index of the lowest bit of the post-VCO divider value in + * the PLL's control register) + * @od_bits: the size of the post-VCO divider field in bits + * @od_max: the maximum post-VCO divider value + * @od_encoding: a pointer to an array mapping post-VCO divider values to + * their encoded values in the PLL control register, or -1 for + * unsupported values + * @bypass_reg: the offset of the bypass control register within the CGU + * @bypass_bit: the index of the bypass bit in the PLL control register, or + * -1 if there is no bypass bit + * @enable_bit: the index of the enable bit in the PLL control register + * @stable_bit: the index of the stable bit in the PLL control register + */ +struct ingenic_cgu_pll_info { + unsigned reg; + unsigned rate_multiplier; + const s8 *od_encoding; + u8 m_shift, m_bits, m_offset; + u8 n_shift, n_bits, n_offset; + u8 od_shift, od_bits, od_max; + unsigned bypass_reg; + s8 bypass_bit; + u8 enable_bit; + u8 stable_bit; + void (*calc_m_n_od)(const struct ingenic_cgu_pll_info *pll_info, + unsigned long rate, unsigned long parent_rate, + unsigned int *m, unsigned int *n, unsigned int *od); +}; + +/** + * struct ingenic_cgu_mux_info - information about a clock mux + * @reg: offset of the mux control register within the CGU + * @shift: number of bits to shift the mux value by (ie. the index of + * the lowest bit of the mux value within its control register) + * @bits: the size of the mux value in bits + */ +struct ingenic_cgu_mux_info { + unsigned reg; + u8 shift; + u8 bits; +}; + +/** + * struct ingenic_cgu_div_info - information about a divider + * @reg: offset of the divider control register within the CGU + * @shift: number of bits to left shift the divide value by (ie. the index of + * the lowest bit of the divide value within its control register) + * @div: number to divide the divider value by (i.e. if the + * effective divider value is the value written to the register + * multiplied by some constant) + * @bits: the size of the divide value in bits + * @ce_bit: the index of the change enable bit within reg, or -1 if there + * isn't one + * @busy_bit: the index of the busy bit within reg, or -1 if there isn't one + * @stop_bit: the index of the stop bit within reg, or -1 if there isn't one + * @bypass_mask: mask of parent clocks for which the divider does not apply + * @div_table: optional table to map the value read from the register to the + * actual divider value + */ +struct ingenic_cgu_div_info { + unsigned reg; + u8 shift; + u8 div; + u8 bits; + s8 ce_bit; + s8 busy_bit; + s8 stop_bit; + u8 bypass_mask; + const u8 *div_table; +}; + +/** + * struct ingenic_cgu_fixdiv_info - information about a fixed divider + * @div: the divider applied to the parent clock + */ +struct ingenic_cgu_fixdiv_info { + unsigned div; +}; + +/** + * struct ingenic_cgu_gate_info - information about a clock gate + * @reg: offset of the gate control register within the CGU + * @bit: offset of the bit in the register that controls the gate + * @clear_to_gate: if set, the clock is gated when the bit is cleared + * @delay_us: delay in microseconds after which the clock is considered stable + */ +struct ingenic_cgu_gate_info { + unsigned reg; + u8 bit; + bool clear_to_gate; + u16 delay_us; +}; + +/** + * struct ingenic_cgu_custom_info - information about a custom (SoC) clock + * @clk_ops: custom clock operation callbacks + */ +struct ingenic_cgu_custom_info { + const struct clk_ops *clk_ops; +}; + +/** + * struct ingenic_cgu_clk_info - information about a clock + * @name: name of the clock + * @type: a bitmask formed from CGU_CLK_* values + * @flags: common clock flags to set on this clock + * @parents: an array of the indices of potential parents of this clock + * within the clock_info array of the CGU, or -1 in entries + * which correspond to no valid parent + * @pll: information valid if type includes CGU_CLK_PLL + * @gate: information valid if type includes CGU_CLK_GATE + * @mux: information valid if type includes CGU_CLK_MUX + * @div: information valid if type includes CGU_CLK_DIV + * @fixdiv: information valid if type includes CGU_CLK_FIXDIV + * @custom: information valid if type includes CGU_CLK_CUSTOM + */ +struct ingenic_cgu_clk_info { + const char *name; + + enum { + CGU_CLK_NONE = 0, + CGU_CLK_EXT = BIT(0), + CGU_CLK_PLL = BIT(1), + CGU_CLK_GATE = BIT(2), + CGU_CLK_MUX = BIT(3), + CGU_CLK_MUX_GLITCHFREE = BIT(4), + CGU_CLK_DIV = BIT(5), + CGU_CLK_FIXDIV = BIT(6), + CGU_CLK_CUSTOM = BIT(7), + } type; + + unsigned long flags; + + int parents[4]; + + union { + struct ingenic_cgu_pll_info pll; + + struct { + struct ingenic_cgu_gate_info gate; + struct ingenic_cgu_mux_info mux; + struct ingenic_cgu_div_info div; + struct ingenic_cgu_fixdiv_info fixdiv; + }; + + struct ingenic_cgu_custom_info custom; + }; +}; + +/** + * struct ingenic_cgu - data about the CGU + * @np: the device tree node that caused the CGU to be probed + * @base: the ioremap'ed base address of the CGU registers + * @clock_info: an array containing information about implemented clocks + * @clocks: used to provide clocks to DT, allows lookup of struct clk* + * @lock: lock to be held whilst manipulating CGU registers + */ +struct ingenic_cgu { + struct device_node *np; + void __iomem *base; + + const struct ingenic_cgu_clk_info *clock_info; + struct clk_onecell_data clocks; + + spinlock_t lock; +}; + +/** + * struct ingenic_clk - private data for a clock + * @hw: see Documentation/driver-api/clk.rst + * @cgu: a pointer to the CGU data + * @idx: the index of this clock in cgu->clock_info + */ +struct ingenic_clk { + struct clk_hw hw; + struct ingenic_cgu *cgu; + unsigned idx; +}; + +#define to_ingenic_clk(_hw) container_of(_hw, struct ingenic_clk, hw) + +/** + * ingenic_cgu_new() - create a new CGU instance + * @clock_info: an array of clock information structures describing the clocks + * which are implemented by the CGU + * @num_clocks: the number of entries in clock_info + * @np: the device tree node which causes this CGU to be probed + * + * Return: a pointer to the CGU instance if initialisation is successful, + * otherwise NULL. + */ +struct ingenic_cgu * +ingenic_cgu_new(const struct ingenic_cgu_clk_info *clock_info, + unsigned num_clocks, struct device_node *np); + +/** + * ingenic_cgu_register_clocks() - Registers the clocks + * @cgu: pointer to cgu data + * + * Register the clocks described by the CGU with the common clock framework. + * + * Return: 0 on success or -errno if unsuccesful. + */ +int ingenic_cgu_register_clocks(struct ingenic_cgu *cgu); + +#endif /* __DRIVERS_CLK_INGENIC_CGU_H__ */ diff --git a/drivers/clk/ingenic/jz4725b-cgu.c b/drivers/clk/ingenic/jz4725b-cgu.c new file mode 100644 index 000000000..590e9c85c --- /dev/null +++ b/drivers/clk/ingenic/jz4725b-cgu.c @@ -0,0 +1,273 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Ingenic JZ4725B SoC CGU driver + * + * Copyright (C) 2018 Paul Cercueil + * Author: Paul Cercueil <paul@crapouillou.net> + */ + +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/of.h> + +#include <dt-bindings/clock/ingenic,jz4725b-cgu.h> + +#include "cgu.h" +#include "pm.h" + +/* CGU register offsets */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_LCR 0x04 +#define CGU_REG_CPPCR 0x10 +#define CGU_REG_CLKGR 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSCCDR 0x68 +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x78 + +/* bits within the LCR register */ +#define LCR_SLEEP BIT(0) + +static struct ingenic_cgu *cgu; + +static const s8 pll_od_encoding[4] = { + 0x0, 0x1, -1, 0x3, +}; + +static const u8 jz4725b_cgu_cpccr_div_table[] = { + 1, 2, 3, 4, 6, 8, +}; + +static const u8 jz4725b_cgu_pll_half_div_table[] = { + 2, 1, +}; + +static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { + + /* External clocks */ + + [JZ4725B_CLK_EXT] = { "ext", CGU_CLK_EXT }, + [JZ4725B_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT }, + + [JZ4725B_CLK_PLL] = { + "pll", CGU_CLK_PLL, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_CPPCR, + .rate_multiplier = 1, + .m_shift = 23, + .m_bits = 9, + .m_offset = 2, + .n_shift = 18, + .n_bits = 5, + .n_offset = 2, + .od_shift = 16, + .od_bits = 2, + .od_max = 4, + .od_encoding = pll_od_encoding, + .stable_bit = 10, + .bypass_reg = CGU_REG_CPPCR, + .bypass_bit = 9, + .enable_bit = 8, + }, + }, + + /* Muxes & dividers */ + + [JZ4725B_CLK_PLL_HALF] = { + "pll half", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0, + jz4725b_cgu_pll_half_div_table, + }, + }, + + [JZ4725B_CLK_CCLK] = { + "cclk", CGU_CLK_DIV, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, + }, + + [JZ4725B_CLK_HCLK] = { + "hclk", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, + }, + + [JZ4725B_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, + }, + + [JZ4725B_CLK_MCLK] = { + "mclk", CGU_CLK_DIV, + /* + * Disabling MCLK or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, + }, + + [JZ4725B_CLK_IPU] = { + "ipu", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0, + jz4725b_cgu_cpccr_div_table, + }, + .gate = { CGU_REG_CLKGR, 13 }, + }, + + [JZ4725B_CLK_LCD] = { + "lcd", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 9 }, + }, + + [JZ4725B_CLK_I2S] = { + "i2s", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 }, + .mux = { CGU_REG_CPCCR, 31, 1 }, + .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 }, + }, + + [JZ4725B_CLK_SPI] = { + "spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL, -1, -1 }, + .mux = { CGU_REG_SSICDR, 31, 1 }, + .div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 4 }, + }, + + [JZ4725B_CLK_MMC_MUX] = { + "mmc_mux", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 }, + }, + + [JZ4725B_CLK_UDC] = { + "udc", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 }, + .mux = { CGU_REG_CPCCR, 29, 1 }, + .div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 }, + }, + + /* Gate-only clocks */ + + [JZ4725B_CLK_UART] = { + "uart", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 0 }, + }, + + [JZ4725B_CLK_DMA] = { + "dma", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 12 }, + }, + + [JZ4725B_CLK_ADC] = { + "adc", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 7 }, + }, + + [JZ4725B_CLK_I2C] = { + "i2c", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 3 }, + }, + + [JZ4725B_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 5 }, + }, + + [JZ4725B_CLK_MMC0] = { + "mmc0", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 6 }, + }, + + [JZ4725B_CLK_MMC1] = { + "mmc1", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 16 }, + }, + + [JZ4725B_CLK_BCH] = { + "bch", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_MCLK/* not sure */, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 11 }, + }, + + [JZ4725B_CLK_TCU] = { + "tcu", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT/* not sure */, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 1 }, + }, + + [JZ4725B_CLK_EXT512] = { + "ext/512", CGU_CLK_FIXDIV, + .parents = { JZ4725B_CLK_EXT }, + + /* Doc calls it EXT512, but it seems to be /256... */ + .fixdiv = { 256 }, + }, + + [JZ4725B_CLK_RTC] = { + "rtc", CGU_CLK_MUX, + .parents = { JZ4725B_CLK_EXT512, JZ4725B_CLK_OSC32K, -1, -1 }, + .mux = { CGU_REG_OPCR, 2, 1}, + }, + + [JZ4725B_CLK_UDC_PHY] = { + "udc_phy", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_OPCR, 6, true }, + }, +}; + +static void __init jz4725b_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(jz4725b_cgu_clocks, + ARRAY_SIZE(jz4725b_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) + pr_err("%s: failed to register CGU Clocks\n", __func__); + + ingenic_cgu_register_syscore_ops(cgu); +} +CLK_OF_DECLARE_DRIVER(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init); diff --git a/drivers/clk/ingenic/jz4740-cgu.c b/drivers/clk/ingenic/jz4740-cgu.c new file mode 100644 index 000000000..3e0a30574 --- /dev/null +++ b/drivers/clk/ingenic/jz4740-cgu.c @@ -0,0 +1,271 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Ingenic JZ4740 SoC CGU driver + * + * Copyright (c) 2015 Imagination Technologies + * Author: Paul Burton <paul.burton@mips.com> + */ + +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of.h> + +#include <dt-bindings/clock/ingenic,jz4740-cgu.h> + +#include "cgu.h" +#include "pm.h" + +/* CGU register offsets */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_LCR 0x04 +#define CGU_REG_CPPCR 0x10 +#define CGU_REG_CLKGR 0x20 +#define CGU_REG_SCR 0x24 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSCCDR 0x68 +#define CGU_REG_UHCCDR 0x6c +#define CGU_REG_SSICDR 0x74 + +/* bits within a PLL control register */ +#define PLLCTL_M_SHIFT 23 +#define PLLCTL_M_MASK (0x1ff << PLLCTL_M_SHIFT) +#define PLLCTL_N_SHIFT 18 +#define PLLCTL_N_MASK (0x1f << PLLCTL_N_SHIFT) +#define PLLCTL_OD_SHIFT 16 +#define PLLCTL_OD_MASK (0x3 << PLLCTL_OD_SHIFT) +#define PLLCTL_STABLE (1 << 10) +#define PLLCTL_BYPASS (1 << 9) +#define PLLCTL_ENABLE (1 << 8) + +/* bits within the LCR register */ +#define LCR_SLEEP (1 << 0) + +/* bits within the CLKGR register */ +#define CLKGR_UDC (1 << 11) + +static struct ingenic_cgu *cgu; + +static const s8 pll_od_encoding[4] = { + 0x0, 0x1, -1, 0x3, +}; + +static const u8 jz4740_cgu_cpccr_div_table[] = { + 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, +}; + +static const u8 jz4740_cgu_pll_half_div_table[] = { + 2, 1, +}; + +static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { + + /* External clocks */ + + [JZ4740_CLK_EXT] = { "ext", CGU_CLK_EXT }, + [JZ4740_CLK_RTC] = { "rtc", CGU_CLK_EXT }, + + [JZ4740_CLK_PLL] = { + "pll", CGU_CLK_PLL, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_CPPCR, + .rate_multiplier = 1, + .m_shift = 23, + .m_bits = 9, + .m_offset = 2, + .n_shift = 18, + .n_bits = 5, + .n_offset = 2, + .od_shift = 16, + .od_bits = 2, + .od_max = 4, + .od_encoding = pll_od_encoding, + .stable_bit = 10, + .bypass_reg = CGU_REG_CPPCR, + .bypass_bit = 9, + .enable_bit = 8, + }, + }, + + /* Muxes & dividers */ + + [JZ4740_CLK_PLL_HALF] = { + "pll half", CGU_CLK_DIV, + .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0, + jz4740_cgu_pll_half_div_table, + }, + }, + + [JZ4740_CLK_CCLK] = { + "cclk", CGU_CLK_DIV, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0, + jz4740_cgu_cpccr_div_table, + }, + }, + + [JZ4740_CLK_HCLK] = { + "hclk", CGU_CLK_DIV, + .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0, + jz4740_cgu_cpccr_div_table, + }, + }, + + [JZ4740_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0, + jz4740_cgu_cpccr_div_table, + }, + }, + + [JZ4740_CLK_MCLK] = { + "mclk", CGU_CLK_DIV, + /* + * Disabling MCLK or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0, + jz4740_cgu_cpccr_div_table, + }, + }, + + [JZ4740_CLK_LCD] = { + "lcd", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 }, + .div = { + CGU_REG_CPCCR, 16, 1, 5, 22, -1, -1, 0, + jz4740_cgu_cpccr_div_table, + }, + .gate = { CGU_REG_CLKGR, 10 }, + }, + + [JZ4740_CLK_LCD_PCLK] = { + "lcd_pclk", CGU_CLK_DIV, + .parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, + }, + + [JZ4740_CLK_I2S] = { + "i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 }, + .mux = { CGU_REG_CPCCR, 31, 1 }, + .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 6 }, + }, + + [JZ4740_CLK_SPI] = { + "spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL, -1, -1 }, + .mux = { CGU_REG_SSICDR, 31, 1 }, + .div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 4 }, + }, + + [JZ4740_CLK_MMC] = { + "mmc", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 7 }, + }, + + [JZ4740_CLK_UHC] = { + "uhc", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 14 }, + }, + + [JZ4740_CLK_UDC] = { + "udc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 }, + .mux = { CGU_REG_CPCCR, 29, 1 }, + .div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 }, + .gate = { CGU_REG_SCR, 6, true }, + }, + + /* Gate-only clocks */ + + [JZ4740_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 0 }, + }, + + [JZ4740_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 15 }, + }, + + [JZ4740_CLK_DMA] = { + "dma", CGU_CLK_GATE, + .parents = { JZ4740_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 12 }, + }, + + [JZ4740_CLK_IPU] = { + "ipu", CGU_CLK_GATE, + .parents = { JZ4740_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 13 }, + }, + + [JZ4740_CLK_ADC] = { + "adc", CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 8 }, + }, + + [JZ4740_CLK_I2C] = { + "i2c", CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 3 }, + }, + + [JZ4740_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 5 }, + }, + + [JZ4740_CLK_TCU] = { + "tcu", CGU_CLK_GATE, + .parents = { JZ4740_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 1 }, + }, +}; + +static void __init jz4740_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(jz4740_cgu_clocks, + ARRAY_SIZE(jz4740_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) + pr_err("%s: failed to register CGU Clocks\n", __func__); + + ingenic_cgu_register_syscore_ops(cgu); +} +CLK_OF_DECLARE_DRIVER(jz4740_cgu, "ingenic,jz4740-cgu", jz4740_cgu_init); diff --git a/drivers/clk/ingenic/jz4760-cgu.c b/drivers/clk/ingenic/jz4760-cgu.c new file mode 100644 index 000000000..e407f00bd --- /dev/null +++ b/drivers/clk/ingenic/jz4760-cgu.c @@ -0,0 +1,446 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * JZ4760 SoC CGU driver + * Copyright 2018, Paul Cercueil <paul@crapouillou.net> + */ + +#include <linux/bitops.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of.h> + +#include <linux/clk.h> + +#include <dt-bindings/clock/ingenic,jz4760-cgu.h> + +#include "cgu.h" +#include "pm.h" + +#define MHZ (1000 * 1000) + +/* + * CPM registers offset address definition + */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_LCR 0x04 +#define CGU_REG_CPPCR0 0x10 +#define CGU_REG_CLKGR0 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_CLKGR1 0x28 +#define CGU_REG_CPPCR1 0x30 +#define CGU_REG_USBPCR 0x3c +#define CGU_REG_USBCDR 0x50 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSCCDR 0x68 +#define CGU_REG_UHCCDR 0x6c +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x7c +#define CGU_REG_GPSCDR 0x80 +#define CGU_REG_PCMCDR 0x84 +#define CGU_REG_GPUCDR 0x88 + +static const s8 pll_od_encoding[8] = { + 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3, +}; + +static const u8 jz4760_cgu_cpccr_div_table[] = { + 1, 2, 3, 4, 6, 8, +}; + +static const u8 jz4760_cgu_pll_half_div_table[] = { + 2, 1, +}; + +static void +jz4760_cgu_calc_m_n_od(const struct ingenic_cgu_pll_info *pll_info, + unsigned long rate, unsigned long parent_rate, + unsigned int *pm, unsigned int *pn, unsigned int *pod) +{ + unsigned int m, n, od, m_max = (1 << pll_info->m_bits) - 1; + + /* The frequency after the N divider must be between 1 and 50 MHz. */ + n = parent_rate / (1 * MHZ); + + /* The N divider must be >= 2. */ + n = clamp_val(n, 2, 1 << pll_info->n_bits); + + rate /= MHZ; + parent_rate /= MHZ; + + for (m = m_max; m >= m_max && n >= 2; n--) { + m = rate * n / parent_rate; + od = m & 1; + m <<= od; + } + + *pm = m; + *pn = n + 1; + *pod = 1 << od; +} + +static const struct ingenic_cgu_clk_info jz4760_cgu_clocks[] = { + + /* External clocks */ + + [JZ4760_CLK_EXT] = { "ext", CGU_CLK_EXT }, + [JZ4760_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT }, + + /* PLLs */ + + [JZ4760_CLK_PLL0] = { + "pll0", CGU_CLK_PLL, + .parents = { JZ4760_CLK_EXT }, + .pll = { + .reg = CGU_REG_CPPCR0, + .rate_multiplier = 1, + .m_shift = 23, + .m_bits = 8, + .m_offset = 0, + .n_shift = 18, + .n_bits = 4, + .n_offset = 0, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_CPPCR0, + .bypass_bit = 9, + .enable_bit = 8, + .stable_bit = 10, + .calc_m_n_od = jz4760_cgu_calc_m_n_od, + }, + }, + + [JZ4760_CLK_PLL1] = { + /* TODO: PLL1 can depend on PLL0 */ + "pll1", CGU_CLK_PLL, + .parents = { JZ4760_CLK_EXT }, + .pll = { + .reg = CGU_REG_CPPCR1, + .rate_multiplier = 1, + .m_shift = 23, + .m_bits = 8, + .m_offset = 0, + .n_shift = 18, + .n_bits = 4, + .n_offset = 0, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_bit = -1, + .enable_bit = 7, + .stable_bit = 6, + .calc_m_n_od = jz4760_cgu_calc_m_n_od, + }, + }, + + /* Main clocks */ + + [JZ4760_CLK_CCLK] = { + "cclk", CGU_CLK_DIV, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4760_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0, + jz4760_cgu_cpccr_div_table, + }, + }, + [JZ4760_CLK_HCLK] = { + "hclk", CGU_CLK_DIV, + .parents = { JZ4760_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0, + jz4760_cgu_cpccr_div_table, + }, + }, + [JZ4760_CLK_SCLK] = { + "sclk", CGU_CLK_DIV, + .parents = { JZ4760_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 24, 1, 4, 22, -1, -1, 0, + jz4760_cgu_cpccr_div_table, + }, + }, + [JZ4760_CLK_H2CLK] = { + "h2clk", CGU_CLK_DIV, + .parents = { JZ4760_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0, + jz4760_cgu_cpccr_div_table, + }, + }, + [JZ4760_CLK_MCLK] = { + "mclk", CGU_CLK_DIV, + /* + * Disabling MCLK or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4760_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0, + jz4760_cgu_cpccr_div_table, + }, + }, + [JZ4760_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4760_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0, + jz4760_cgu_cpccr_div_table, + }, + }, + + /* Divided clocks */ + + [JZ4760_CLK_PLL0_HALF] = { + "pll0_half", CGU_CLK_DIV, + .parents = { JZ4760_CLK_PLL0 }, + .div = { + CGU_REG_CPCCR, 21, 1, 1, 22, -1, -1, 0, + jz4760_cgu_pll_half_div_table, + }, + }, + + /* Those divided clocks can connect to PLL0 or PLL1 */ + + [JZ4760_CLK_UHC] = { + "uhc", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1, }, + .mux = { CGU_REG_UHCCDR, 31, 1 }, + .div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 24 }, + }, + [JZ4760_CLK_GPU] = { + "gpu", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1, }, + .mux = { CGU_REG_GPUCDR, 31, 1 }, + .div = { CGU_REG_GPUCDR, 0, 1, 3, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 9 }, + }, + [JZ4760_CLK_LPCLK_DIV] = { + "lpclk_div", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1, }, + .mux = { CGU_REG_LPCDR, 29, 1 }, + .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, + }, + [JZ4760_CLK_TVE] = { + "tve", CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_LPCLK_DIV, JZ4760_CLK_EXT, }, + .mux = { CGU_REG_LPCDR, 31, 1 }, + .gate = { CGU_REG_CLKGR0, 27 }, + }, + [JZ4760_CLK_LPCLK] = { + "lpclk", CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_LPCLK_DIV, JZ4760_CLK_TVE, }, + .mux = { CGU_REG_LPCDR, 30, 1 }, + .gate = { CGU_REG_CLKGR0, 28 }, + }, + [JZ4760_CLK_GPS] = { + "gps", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1, }, + .mux = { CGU_REG_GPSCDR, 31, 1 }, + .div = { CGU_REG_GPSCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 22 }, + }, + + /* Those divided clocks can connect to EXT, PLL0 or PLL1 */ + + [JZ4760_CLK_PCM] = { + "pcm", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_EXT, -1, + JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1 }, + .mux = { CGU_REG_PCMCDR, 30, 2 }, + .div = { CGU_REG_PCMCDR, 0, 1, 9, -1, -1, -1, BIT(0) }, + .gate = { CGU_REG_CLKGR1, 8 }, + }, + [JZ4760_CLK_I2S] = { + "i2s", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4760_CLK_EXT, -1, + JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1 }, + .mux = { CGU_REG_I2SCDR, 30, 2 }, + .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1, BIT(0) }, + }, + [JZ4760_CLK_OTG] = { + "usb", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4760_CLK_EXT, -1, + JZ4760_CLK_PLL0_HALF, JZ4760_CLK_PLL1 }, + .mux = { CGU_REG_USBCDR, 30, 2 }, + .div = { CGU_REG_USBCDR, 0, 1, 8, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 2 }, + }, + + /* Those divided clocks can connect to EXT or PLL0 */ + [JZ4760_CLK_MMC_MUX] = { + "mmc_mux", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4760_CLK_EXT, JZ4760_CLK_PLL0_HALF, }, + .mux = { CGU_REG_MSCCDR, 31, 1 }, + .div = { CGU_REG_MSCCDR, 0, 1, 6, -1, -1, -1, BIT(0) }, + }, + [JZ4760_CLK_SSI_MUX] = { + "ssi_mux", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4760_CLK_EXT, JZ4760_CLK_PLL0_HALF, }, + .mux = { CGU_REG_SSICDR, 31, 1 }, + .div = { CGU_REG_SSICDR, 0, 1, 6, -1, -1, -1, BIT(0) }, + }, + + /* These divided clock can connect to PLL0 only */ + [JZ4760_CLK_CIM] = { + "cim", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4760_CLK_PLL0_HALF }, + .div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 26 }, + }, + + /* Gate-only clocks */ + + [JZ4760_CLK_SSI0] = { + "ssi0", CGU_CLK_GATE, + .parents = { JZ4760_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 4 }, + }, + [JZ4760_CLK_SSI1] = { + "ssi1", CGU_CLK_GATE, + .parents = { JZ4760_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 19 }, + }, + [JZ4760_CLK_SSI2] = { + "ssi2", CGU_CLK_GATE, + .parents = { JZ4760_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 20 }, + }, + [JZ4760_CLK_DMA] = { + "dma", CGU_CLK_GATE, + .parents = { JZ4760_CLK_H2CLK, }, + .gate = { CGU_REG_CLKGR0, 21 }, + }, + [JZ4760_CLK_MDMA] = { + "mdma", CGU_CLK_GATE, + .parents = { JZ4760_CLK_HCLK, }, + .gate = { CGU_REG_CLKGR0, 25 }, + }, + [JZ4760_CLK_BDMA] = { + "bdma", CGU_CLK_GATE, + .parents = { JZ4760_CLK_HCLK, }, + .gate = { CGU_REG_CLKGR1, 0 }, + }, + [JZ4760_CLK_I2C0] = { + "i2c0", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 5 }, + }, + [JZ4760_CLK_I2C1] = { + "i2c1", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 6 }, + }, + [JZ4760_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 15 }, + }, + [JZ4760_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 16 }, + }, + [JZ4760_CLK_UART2] = { + "uart2", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 17 }, + }, + [JZ4760_CLK_UART3] = { + "uart3", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 18 }, + }, + [JZ4760_CLK_IPU] = { + "ipu", CGU_CLK_GATE, + .parents = { JZ4760_CLK_HCLK, }, + .gate = { CGU_REG_CLKGR0, 29 }, + }, + [JZ4760_CLK_ADC] = { + "adc", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 14 }, + }, + [JZ4760_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4760_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 8 }, + }, + [JZ4760_CLK_VPU] = { + "vpu", CGU_CLK_GATE, + .parents = { JZ4760_CLK_HCLK, }, + .gate = { CGU_REG_LCR, 30, false, 150 }, + }, + [JZ4760_CLK_MMC0] = { + "mmc0", CGU_CLK_GATE, + .parents = { JZ4760_CLK_MMC_MUX, }, + .gate = { CGU_REG_CLKGR0, 3 }, + }, + [JZ4760_CLK_MMC1] = { + "mmc1", CGU_CLK_GATE, + .parents = { JZ4760_CLK_MMC_MUX, }, + .gate = { CGU_REG_CLKGR0, 11 }, + }, + [JZ4760_CLK_MMC2] = { + "mmc2", CGU_CLK_GATE, + .parents = { JZ4760_CLK_MMC_MUX, }, + .gate = { CGU_REG_CLKGR0, 12 }, + }, + [JZ4760_CLK_UHC_PHY] = { + "uhc_phy", CGU_CLK_GATE, + .parents = { JZ4760_CLK_UHC, }, + .gate = { CGU_REG_OPCR, 5 }, + }, + [JZ4760_CLK_OTG_PHY] = { + "usb_phy", CGU_CLK_GATE, + .parents = { JZ4760_CLK_OTG }, + .gate = { CGU_REG_OPCR, 7, true, 50 }, + }, + + /* Custom clocks */ + [JZ4760_CLK_EXT512] = { + "ext/512", CGU_CLK_FIXDIV, + .parents = { JZ4760_CLK_EXT }, + .fixdiv = { 512 }, + }, + [JZ4760_CLK_RTC] = { + "rtc", CGU_CLK_MUX, + .parents = { JZ4760_CLK_EXT512, JZ4760_CLK_OSC32K, }, + .mux = { CGU_REG_OPCR, 2, 1}, + }, +}; + +static void __init jz4760_cgu_init(struct device_node *np) +{ + struct ingenic_cgu *cgu; + int retval; + + cgu = ingenic_cgu_new(jz4760_cgu_clocks, + ARRAY_SIZE(jz4760_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) + pr_err("%s: failed to register CGU Clocks\n", __func__); + + ingenic_cgu_register_syscore_ops(cgu); +} + +/* We only probe via devicetree, no need for a platform driver */ +CLK_OF_DECLARE_DRIVER(jz4760_cgu, "ingenic,jz4760-cgu", jz4760_cgu_init); + +/* JZ4760B has some small differences, but we don't implement them. */ +CLK_OF_DECLARE_DRIVER(jz4760b_cgu, "ingenic,jz4760b-cgu", jz4760_cgu_init); diff --git a/drivers/clk/ingenic/jz4770-cgu.c b/drivers/clk/ingenic/jz4770-cgu.c new file mode 100644 index 000000000..6ae174036 --- /dev/null +++ b/drivers/clk/ingenic/jz4770-cgu.c @@ -0,0 +1,463 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * JZ4770 SoC CGU driver + * Copyright 2018, Paul Cercueil <paul@crapouillou.net> + */ + +#include <linux/bitops.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of.h> + +#include <dt-bindings/clock/ingenic,jz4770-cgu.h> + +#include "cgu.h" +#include "pm.h" + +/* + * CPM registers offset address definition + */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_LCR 0x04 +#define CGU_REG_CPPCR0 0x10 +#define CGU_REG_CLKGR0 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_CLKGR1 0x28 +#define CGU_REG_CPPCR1 0x30 +#define CGU_REG_USBPCR1 0x48 +#define CGU_REG_USBCDR 0x50 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSC0CDR 0x68 +#define CGU_REG_UHCCDR 0x6c +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x7c +#define CGU_REG_GPSCDR 0x80 +#define CGU_REG_PCMCDR 0x84 +#define CGU_REG_GPUCDR 0x88 +#define CGU_REG_MSC1CDR 0xA4 +#define CGU_REG_MSC2CDR 0xA8 +#define CGU_REG_BCHCDR 0xAC + +/* bits within the OPCR register */ +#define OPCR_SPENDH BIT(5) /* UHC PHY suspend */ + +/* bits within the USBPCR1 register */ +#define USBPCR1_UHC_POWER BIT(5) /* UHC PHY power down */ + +static struct ingenic_cgu *cgu; + +static int jz4770_uhc_phy_enable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr1 = cgu->base + CGU_REG_USBPCR1; + + writel(readl(reg_opcr) & ~OPCR_SPENDH, reg_opcr); + writel(readl(reg_usbpcr1) | USBPCR1_UHC_POWER, reg_usbpcr1); + return 0; +} + +static void jz4770_uhc_phy_disable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr1 = cgu->base + CGU_REG_USBPCR1; + + writel(readl(reg_usbpcr1) & ~USBPCR1_UHC_POWER, reg_usbpcr1); + writel(readl(reg_opcr) | OPCR_SPENDH, reg_opcr); +} + +static int jz4770_uhc_phy_is_enabled(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr1 = cgu->base + CGU_REG_USBPCR1; + + return !(readl(reg_opcr) & OPCR_SPENDH) && + (readl(reg_usbpcr1) & USBPCR1_UHC_POWER); +} + +static const struct clk_ops jz4770_uhc_phy_ops = { + .enable = jz4770_uhc_phy_enable, + .disable = jz4770_uhc_phy_disable, + .is_enabled = jz4770_uhc_phy_is_enabled, +}; + +static const s8 pll_od_encoding[8] = { + 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3, +}; + +static const u8 jz4770_cgu_cpccr_div_table[] = { + 1, 2, 3, 4, 6, 8, 12, +}; + +static const struct ingenic_cgu_clk_info jz4770_cgu_clocks[] = { + + /* External clocks */ + + [JZ4770_CLK_EXT] = { "ext", CGU_CLK_EXT }, + [JZ4770_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT }, + + /* PLLs */ + + [JZ4770_CLK_PLL0] = { + "pll0", CGU_CLK_PLL, + .parents = { JZ4770_CLK_EXT }, + .pll = { + .reg = CGU_REG_CPPCR0, + .rate_multiplier = 1, + .m_shift = 24, + .m_bits = 7, + .m_offset = 1, + .n_shift = 18, + .n_bits = 5, + .n_offset = 1, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_CPPCR0, + .bypass_bit = 9, + .enable_bit = 8, + .stable_bit = 10, + }, + }, + + [JZ4770_CLK_PLL1] = { + /* TODO: PLL1 can depend on PLL0 */ + "pll1", CGU_CLK_PLL, + .parents = { JZ4770_CLK_EXT }, + .pll = { + .reg = CGU_REG_CPPCR1, + .rate_multiplier = 1, + .m_shift = 24, + .m_bits = 7, + .m_offset = 1, + .n_shift = 18, + .n_bits = 5, + .n_offset = 1, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_bit = -1, + .enable_bit = 7, + .stable_bit = 6, + }, + }, + + /* Main clocks */ + + [JZ4770_CLK_CCLK] = { + "cclk", CGU_CLK_DIV, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4770_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0, + jz4770_cgu_cpccr_div_table, + }, + }, + [JZ4770_CLK_H0CLK] = { + "h0clk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0, + jz4770_cgu_cpccr_div_table, + }, + }, + [JZ4770_CLK_H1CLK] = { + "h1clk", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4770_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 24, 1, 4, 22, -1, -1, 0, + jz4770_cgu_cpccr_div_table, + }, + .gate = { CGU_REG_CLKGR1, 7 }, + }, + [JZ4770_CLK_H2CLK] = { + "h2clk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0, + jz4770_cgu_cpccr_div_table, + }, + }, + [JZ4770_CLK_C1CLK] = { + "c1clk", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4770_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0, + jz4770_cgu_cpccr_div_table, + }, + .gate = { CGU_REG_OPCR, 31, true }, // disable CCLK stop on idle + }, + [JZ4770_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { + CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0, + jz4770_cgu_cpccr_div_table, + }, + }, + + /* Those divided clocks can connect to PLL0 or PLL1 */ + + [JZ4770_CLK_MMC0_MUX] = { + "mmc0_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_MSC0CDR, 30, 1 }, + .div = { CGU_REG_MSC0CDR, 0, 1, 7, -1, -1, 31 }, + .gate = { CGU_REG_MSC0CDR, 31 }, + }, + [JZ4770_CLK_MMC1_MUX] = { + "mmc1_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_MSC1CDR, 30, 1 }, + .div = { CGU_REG_MSC1CDR, 0, 1, 7, -1, -1, 31 }, + .gate = { CGU_REG_MSC1CDR, 31 }, + }, + [JZ4770_CLK_MMC2_MUX] = { + "mmc2_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_MSC2CDR, 30, 1 }, + .div = { CGU_REG_MSC2CDR, 0, 1, 7, -1, -1, 31 }, + .gate = { CGU_REG_MSC2CDR, 31 }, + }, + [JZ4770_CLK_CIM] = { + "cim", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_CIMCDR, 31, 1 }, + .div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 26 }, + }, + [JZ4770_CLK_UHC] = { + "uhc", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_UHCCDR, 29, 1 }, + .div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 24 }, + }, + [JZ4770_CLK_GPU] = { + "gpu", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, -1 }, + .mux = { CGU_REG_GPUCDR, 31, 1 }, + .div = { CGU_REG_GPUCDR, 0, 1, 3, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 9 }, + }, + [JZ4770_CLK_BCH] = { + "bch", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_BCHCDR, 31, 1 }, + .div = { CGU_REG_BCHCDR, 0, 1, 3, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 1 }, + }, + [JZ4770_CLK_LPCLK_MUX] = { + "lpclk", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_LPCDR, 29, 1 }, + .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 28 }, + }, + [JZ4770_CLK_GPS] = { + "gps", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_GPSCDR, 31, 1 }, + .div = { CGU_REG_GPSCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 22 }, + }, + + /* Those divided clocks can connect to EXT, PLL0 or PLL1 */ + + [JZ4770_CLK_SSI_MUX] = { + "ssi_mux", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_SSICDR, 30, 2 }, + .div = { CGU_REG_SSICDR, 0, 1, 6, -1, -1, -1 }, + }, + [JZ4770_CLK_PCM_MUX] = { + "pcm_mux", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_PCMCDR, 30, 2 }, + .div = { CGU_REG_PCMCDR, 0, 1, 9, -1, -1, -1 }, + }, + [JZ4770_CLK_I2S] = { + "i2s", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_I2SCDR, 30, 2 }, + .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 13 }, + }, + [JZ4770_CLK_OTG] = { + "usb", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_USBCDR, 30, 2 }, + .div = { CGU_REG_USBCDR, 0, 1, 8, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 2 }, + }, + + /* Gate-only clocks */ + + [JZ4770_CLK_SSI0] = { + "ssi0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 4 }, + }, + [JZ4770_CLK_SSI1] = { + "ssi1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 19 }, + }, + [JZ4770_CLK_SSI2] = { + "ssi2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 20 }, + }, + [JZ4770_CLK_PCM0] = { + "pcm0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_PCM_MUX, }, + .gate = { CGU_REG_CLKGR1, 8 }, + }, + [JZ4770_CLK_PCM1] = { + "pcm1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_PCM_MUX, }, + .gate = { CGU_REG_CLKGR1, 10 }, + }, + [JZ4770_CLK_DMA] = { + "dma", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H2CLK, }, + .gate = { CGU_REG_CLKGR0, 21 }, + }, + [JZ4770_CLK_BDMA] = { + "bdma", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H2CLK, }, + .gate = { CGU_REG_CLKGR1, 0 }, + }, + [JZ4770_CLK_I2C0] = { + "i2c0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 5 }, + }, + [JZ4770_CLK_I2C1] = { + "i2c1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 6 }, + }, + [JZ4770_CLK_I2C2] = { + "i2c2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR1, 15 }, + }, + [JZ4770_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 15 }, + }, + [JZ4770_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 16 }, + }, + [JZ4770_CLK_UART2] = { + "uart2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 17 }, + }, + [JZ4770_CLK_UART3] = { + "uart3", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 18 }, + }, + [JZ4770_CLK_IPU] = { + "ipu", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H0CLK, }, + .gate = { CGU_REG_CLKGR0, 29 }, + }, + [JZ4770_CLK_ADC] = { + "adc", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 14 }, + }, + [JZ4770_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 8 }, + }, + [JZ4770_CLK_AUX] = { + "aux", CGU_CLK_GATE, + .parents = { JZ4770_CLK_C1CLK, }, + .gate = { CGU_REG_CLKGR1, 14 }, + }, + [JZ4770_CLK_VPU] = { + "vpu", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H1CLK, }, + .gate = { CGU_REG_LCR, 30, false, 150 }, + }, + [JZ4770_CLK_MMC0] = { + "mmc0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_MMC0_MUX, }, + .gate = { CGU_REG_CLKGR0, 3 }, + }, + [JZ4770_CLK_MMC1] = { + "mmc1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_MMC1_MUX, }, + .gate = { CGU_REG_CLKGR0, 11 }, + }, + [JZ4770_CLK_MMC2] = { + "mmc2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_MMC2_MUX, }, + .gate = { CGU_REG_CLKGR0, 12 }, + }, + [JZ4770_CLK_OTG_PHY] = { + "usb_phy", CGU_CLK_GATE, + .parents = { JZ4770_CLK_OTG }, + .gate = { CGU_REG_OPCR, 7, true, 50 }, + }, + + /* Custom clocks */ + + [JZ4770_CLK_UHC_PHY] = { + "uhc_phy", CGU_CLK_CUSTOM, + .parents = { JZ4770_CLK_UHC, -1, -1, -1 }, + .custom = { &jz4770_uhc_phy_ops }, + }, + + [JZ4770_CLK_EXT512] = { + "ext/512", CGU_CLK_FIXDIV, + .parents = { JZ4770_CLK_EXT }, + .fixdiv = { 512 }, + }, + + [JZ4770_CLK_RTC] = { + "rtc", CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT512, JZ4770_CLK_OSC32K, }, + .mux = { CGU_REG_OPCR, 2, 1}, + }, +}; + +static void __init jz4770_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(jz4770_cgu_clocks, + ARRAY_SIZE(jz4770_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) + pr_err("%s: failed to register CGU Clocks\n", __func__); + + ingenic_cgu_register_syscore_ops(cgu); +} + +/* We only probe via devicetree, no need for a platform driver */ +CLK_OF_DECLARE_DRIVER(jz4770_cgu, "ingenic,jz4770-cgu", jz4770_cgu_init); diff --git a/drivers/clk/ingenic/jz4780-cgu.c b/drivers/clk/ingenic/jz4780-cgu.c new file mode 100644 index 000000000..b1dadc0a5 --- /dev/null +++ b/drivers/clk/ingenic/jz4780-cgu.c @@ -0,0 +1,808 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Ingenic JZ4780 SoC CGU driver + * + * Copyright (c) 2013-2015 Imagination Technologies + * Author: Paul Burton <paul.burton@mips.com> + * Copyright (c) 2020 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> + */ + +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/of.h> + +#include <dt-bindings/clock/ingenic,jz4780-cgu.h> + +#include "cgu.h" +#include "pm.h" + +/* CGU register offsets */ +#define CGU_REG_CLOCKCONTROL 0x00 +#define CGU_REG_LCR 0x04 +#define CGU_REG_APLL 0x10 +#define CGU_REG_MPLL 0x14 +#define CGU_REG_EPLL 0x18 +#define CGU_REG_VPLL 0x1c +#define CGU_REG_CLKGR0 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_CLKGR1 0x28 +#define CGU_REG_DDRCDR 0x2c +#define CGU_REG_VPUCDR 0x30 +#define CGU_REG_USBPCR 0x3c +#define CGU_REG_USBRDT 0x40 +#define CGU_REG_USBVBFIL 0x44 +#define CGU_REG_USBPCR1 0x48 +#define CGU_REG_LP0CDR 0x54 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LP1CDR 0x64 +#define CGU_REG_MSC0CDR 0x68 +#define CGU_REG_UHCCDR 0x6c +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x7c +#define CGU_REG_PCMCDR 0x84 +#define CGU_REG_GPUCDR 0x88 +#define CGU_REG_HDMICDR 0x8c +#define CGU_REG_MSC1CDR 0xa4 +#define CGU_REG_MSC2CDR 0xa8 +#define CGU_REG_BCHCDR 0xac +#define CGU_REG_CLOCKSTATUS 0xd4 + +/* bits within the OPCR register */ +#define OPCR_SPENDN0 BIT(7) +#define OPCR_SPENDN1 BIT(6) + +/* bits within the USBPCR register */ +#define USBPCR_USB_MODE BIT(31) +#define USBPCR_IDPULLUP_MASK (0x3 << 28) +#define USBPCR_COMMONONN BIT(25) +#define USBPCR_VBUSVLDEXT BIT(24) +#define USBPCR_VBUSVLDEXTSEL BIT(23) +#define USBPCR_POR BIT(22) +#define USBPCR_SIDDQ BIT(21) +#define USBPCR_OTG_DISABLE BIT(20) +#define USBPCR_COMPDISTUNE_MASK (0x7 << 17) +#define USBPCR_OTGTUNE_MASK (0x7 << 14) +#define USBPCR_SQRXTUNE_MASK (0x7 << 11) +#define USBPCR_TXFSLSTUNE_MASK (0xf << 7) +#define USBPCR_TXPREEMPHTUNE BIT(6) +#define USBPCR_TXHSXVTUNE_MASK (0x3 << 4) +#define USBPCR_TXVREFTUNE_MASK 0xf + +/* bits within the USBPCR1 register */ +#define USBPCR1_REFCLKSEL_SHIFT 26 +#define USBPCR1_REFCLKSEL_MASK (0x3 << USBPCR1_REFCLKSEL_SHIFT) +#define USBPCR1_REFCLKSEL_CORE (0x2 << USBPCR1_REFCLKSEL_SHIFT) +#define USBPCR1_REFCLKDIV_SHIFT 24 +#define USBPCR1_REFCLKDIV_MASK (0x3 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_19_2 (0x3 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_48 (0x2 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_24 (0x1 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_12 (0x0 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_USB_SEL BIT(28) +#define USBPCR1_WORD_IF0 BIT(19) +#define USBPCR1_WORD_IF1 BIT(18) + +/* bits within the USBRDT register */ +#define USBRDT_VBFIL_LD_EN BIT(25) +#define USBRDT_USBRDT_MASK 0x7fffff + +/* bits within the USBVBFIL register */ +#define USBVBFIL_IDDIGFIL_SHIFT 16 +#define USBVBFIL_IDDIGFIL_MASK (0xffff << USBVBFIL_IDDIGFIL_SHIFT) +#define USBVBFIL_USBVBFIL_MASK (0xffff) + +/* bits within the LCR register */ +#define LCR_PD_SCPU BIT(31) +#define LCR_SCPUS BIT(27) + +/* bits within the CLKGR1 register */ +#define CLKGR1_CORE1 BIT(15) + +static struct ingenic_cgu *cgu; + +static unsigned long jz4780_otg_phy_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u32 usbpcr1; + unsigned refclk_div; + + usbpcr1 = readl(cgu->base + CGU_REG_USBPCR1); + refclk_div = usbpcr1 & USBPCR1_REFCLKDIV_MASK; + + switch (refclk_div) { + case USBPCR1_REFCLKDIV_12: + return 12000000; + + case USBPCR1_REFCLKDIV_24: + return 24000000; + + case USBPCR1_REFCLKDIV_48: + return 48000000; + + case USBPCR1_REFCLKDIV_19_2: + return 19200000; + } + + return parent_rate; +} + +static long jz4780_otg_phy_round_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long *parent_rate) +{ + if (req_rate < 15600000) + return 12000000; + + if (req_rate < 21600000) + return 19200000; + + if (req_rate < 36000000) + return 24000000; + + return 48000000; +} + +static int jz4780_otg_phy_set_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long parent_rate) +{ + unsigned long flags; + u32 usbpcr1, div_bits; + + switch (req_rate) { + case 12000000: + div_bits = USBPCR1_REFCLKDIV_12; + break; + + case 19200000: + div_bits = USBPCR1_REFCLKDIV_19_2; + break; + + case 24000000: + div_bits = USBPCR1_REFCLKDIV_24; + break; + + case 48000000: + div_bits = USBPCR1_REFCLKDIV_48; + break; + + default: + return -EINVAL; + } + + spin_lock_irqsave(&cgu->lock, flags); + + usbpcr1 = readl(cgu->base + CGU_REG_USBPCR1); + usbpcr1 &= ~USBPCR1_REFCLKDIV_MASK; + usbpcr1 |= div_bits; + writel(usbpcr1, cgu->base + CGU_REG_USBPCR1); + + spin_unlock_irqrestore(&cgu->lock, flags); + return 0; +} + +static int jz4780_otg_phy_enable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel(readl(reg_opcr) | OPCR_SPENDN0, reg_opcr); + writel(readl(reg_usbpcr) & ~USBPCR_OTG_DISABLE & ~USBPCR_SIDDQ, reg_usbpcr); + return 0; +} + +static void jz4780_otg_phy_disable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel(readl(reg_opcr) & ~OPCR_SPENDN0, reg_opcr); + writel(readl(reg_usbpcr) | USBPCR_OTG_DISABLE | USBPCR_SIDDQ, reg_usbpcr); +} + +static int jz4780_otg_phy_is_enabled(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + return (readl(reg_opcr) & OPCR_SPENDN0) && + !(readl(reg_usbpcr) & USBPCR_SIDDQ) && + !(readl(reg_usbpcr) & USBPCR_OTG_DISABLE); +} + +static const struct clk_ops jz4780_otg_phy_ops = { + .recalc_rate = jz4780_otg_phy_recalc_rate, + .round_rate = jz4780_otg_phy_round_rate, + .set_rate = jz4780_otg_phy_set_rate, + + .enable = jz4780_otg_phy_enable, + .disable = jz4780_otg_phy_disable, + .is_enabled = jz4780_otg_phy_is_enabled, +}; + +static int jz4780_core1_enable(struct clk_hw *hw) +{ + struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw); + struct ingenic_cgu *cgu = ingenic_clk->cgu; + const unsigned int timeout = 5000; + unsigned long flags; + int retval; + u32 lcr, clkgr1; + + spin_lock_irqsave(&cgu->lock, flags); + + lcr = readl(cgu->base + CGU_REG_LCR); + lcr &= ~LCR_PD_SCPU; + writel(lcr, cgu->base + CGU_REG_LCR); + + clkgr1 = readl(cgu->base + CGU_REG_CLKGR1); + clkgr1 &= ~CLKGR1_CORE1; + writel(clkgr1, cgu->base + CGU_REG_CLKGR1); + + spin_unlock_irqrestore(&cgu->lock, flags); + + /* wait for the CPU to be powered up */ + retval = readl_poll_timeout(cgu->base + CGU_REG_LCR, lcr, + !(lcr & LCR_SCPUS), 10, timeout); + if (retval == -ETIMEDOUT) { + pr_err("%s: Wait for power up core1 timeout\n", __func__); + return retval; + } + + return 0; +} + +static const struct clk_ops jz4780_core1_ops = { + .enable = jz4780_core1_enable, +}; + +static const s8 pll_od_encoding[16] = { + 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, + 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, +}; + +static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = { + + /* External clocks */ + + [JZ4780_CLK_EXCLK] = { "ext", CGU_CLK_EXT }, + [JZ4780_CLK_RTCLK] = { "rtc", CGU_CLK_EXT }, + + /* PLLs */ + +#define DEF_PLL(name) { \ + .reg = CGU_REG_ ## name, \ + .rate_multiplier = 1, \ + .m_shift = 19, \ + .m_bits = 13, \ + .m_offset = 1, \ + .n_shift = 13, \ + .n_bits = 6, \ + .n_offset = 1, \ + .od_shift = 9, \ + .od_bits = 4, \ + .od_max = 16, \ + .od_encoding = pll_od_encoding, \ + .stable_bit = 6, \ + .bypass_reg = CGU_REG_ ## name, \ + .bypass_bit = 1, \ + .enable_bit = 0, \ +} + + [JZ4780_CLK_APLL] = { + "apll", CGU_CLK_PLL, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .pll = DEF_PLL(APLL), + }, + + [JZ4780_CLK_MPLL] = { + "mpll", CGU_CLK_PLL, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .pll = DEF_PLL(MPLL), + }, + + [JZ4780_CLK_EPLL] = { + "epll", CGU_CLK_PLL, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .pll = DEF_PLL(EPLL), + }, + + [JZ4780_CLK_VPLL] = { + "vpll", CGU_CLK_PLL, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .pll = DEF_PLL(VPLL), + }, + +#undef DEF_PLL + + /* Custom (SoC-specific) OTG PHY */ + + [JZ4780_CLK_OTGPHY] = { + "otg_phy", CGU_CLK_CUSTOM, + .parents = { -1, -1, JZ4780_CLK_EXCLK, -1 }, + .custom = { &jz4780_otg_phy_ops }, + }, + + /* Muxes & dividers */ + + [JZ4780_CLK_SCLKA] = { + "sclk_a", CGU_CLK_MUX, + .parents = { -1, JZ4780_CLK_APLL, JZ4780_CLK_EXCLK, + JZ4780_CLK_RTCLK }, + .mux = { CGU_REG_CLOCKCONTROL, 30, 2 }, + }, + + [JZ4780_CLK_CPUMUX] = { + "cpumux", CGU_CLK_MUX, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL }, + .mux = { CGU_REG_CLOCKCONTROL, 28, 2 }, + }, + + [JZ4780_CLK_CPU] = { + "cpu", CGU_CLK_DIV, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4780_CLK_CPUMUX, -1, -1, -1 }, + .div = { CGU_REG_CLOCKCONTROL, 0, 1, 4, 22, -1, -1 }, + }, + + [JZ4780_CLK_L2CACHE] = { + "l2cache", CGU_CLK_DIV, + /* + * The L2 cache clock is critical if caches are enabled and + * disabling it or any parent clocks will hang the system. + */ + .flags = CLK_IS_CRITICAL, + .parents = { JZ4780_CLK_CPUMUX, -1, -1, -1 }, + .div = { CGU_REG_CLOCKCONTROL, 4, 1, 4, -1, -1, -1 }, + }, + + [JZ4780_CLK_AHB0] = { + "ahb0", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL }, + .mux = { CGU_REG_CLOCKCONTROL, 26, 2 }, + .div = { CGU_REG_CLOCKCONTROL, 8, 1, 4, 21, -1, -1 }, + }, + + [JZ4780_CLK_AHB2PMUX] = { + "ahb2_apb_mux", CGU_CLK_MUX, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_RTCLK }, + .mux = { CGU_REG_CLOCKCONTROL, 24, 2 }, + }, + + [JZ4780_CLK_AHB2] = { + "ahb2", CGU_CLK_DIV, + .parents = { JZ4780_CLK_AHB2PMUX, -1, -1, -1 }, + .div = { CGU_REG_CLOCKCONTROL, 12, 1, 4, 20, -1, -1 }, + }, + + [JZ4780_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4780_CLK_AHB2PMUX, -1, -1, -1 }, + .div = { CGU_REG_CLOCKCONTROL, 16, 1, 4, 20, -1, -1 }, + }, + + [JZ4780_CLK_DDR] = { + "ddr", CGU_CLK_MUX | CGU_CLK_DIV, + /* + * Disabling DDR clock or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1 }, + .mux = { CGU_REG_DDRCDR, 30, 2 }, + .div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 }, + }, + + [JZ4780_CLK_VPU] = { + "vpu", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL, -1 }, + .mux = { CGU_REG_VPUCDR, 30, 2 }, + .div = { CGU_REG_VPUCDR, 0, 1, 4, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR1, 2 }, + }, + + [JZ4780_CLK_I2SPLL] = { + "i2s_pll", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_EPLL, -1, -1 }, + .mux = { CGU_REG_I2SCDR, 30, 1 }, + .div = { CGU_REG_I2SCDR, 0, 1, 8, 29, 28, 27 }, + }, + + [JZ4780_CLK_I2S] = { + "i2s", CGU_CLK_MUX, + .parents = { JZ4780_CLK_EXCLK, JZ4780_CLK_I2SPLL, -1, -1 }, + .mux = { CGU_REG_I2SCDR, 31, 1 }, + }, + + [JZ4780_CLK_LCD0PIXCLK] = { + "lcd0pixclk", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_VPLL, -1 }, + .mux = { CGU_REG_LP0CDR, 30, 2 }, + .div = { CGU_REG_LP0CDR, 0, 1, 8, 28, 27, 26 }, + }, + + [JZ4780_CLK_LCD1PIXCLK] = { + "lcd1pixclk", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_VPLL, -1 }, + .mux = { CGU_REG_LP1CDR, 30, 2 }, + .div = { CGU_REG_LP1CDR, 0, 1, 8, 28, 27, 26 }, + }, + + [JZ4780_CLK_MSCMUX] = { + "msc_mux", CGU_CLK_MUX, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1 }, + .mux = { CGU_REG_MSC0CDR, 30, 2 }, + }, + + [JZ4780_CLK_MSC0] = { + "msc0", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4780_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC0CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 3 }, + }, + + [JZ4780_CLK_MSC1] = { + "msc1", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4780_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC1CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 11 }, + }, + + [JZ4780_CLK_MSC2] = { + "msc2", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4780_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC2CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 12 }, + }, + + [JZ4780_CLK_UHC] = { + "uhc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL, JZ4780_CLK_OTGPHY }, + .mux = { CGU_REG_UHCCDR, 30, 2 }, + .div = { CGU_REG_UHCCDR, 0, 1, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 24 }, + }, + + [JZ4780_CLK_SSIPLL] = { + "ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1, -1 }, + .mux = { CGU_REG_SSICDR, 30, 1 }, + .div = { CGU_REG_SSICDR, 0, 1, 8, 29, 28, 27 }, + }, + + [JZ4780_CLK_SSI] = { + "ssi", CGU_CLK_MUX, + .parents = { JZ4780_CLK_EXCLK, JZ4780_CLK_SSIPLL, -1, -1 }, + .mux = { CGU_REG_SSICDR, 31, 1 }, + }, + + [JZ4780_CLK_CIMMCLK] = { + "cim_mclk", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1, -1 }, + .mux = { CGU_REG_CIMCDR, 31, 1 }, + .div = { CGU_REG_CIMCDR, 0, 1, 8, 30, 29, 28 }, + }, + + [JZ4780_CLK_PCMPLL] = { + "pcm_pll", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL, JZ4780_CLK_VPLL }, + .mux = { CGU_REG_PCMCDR, 29, 2 }, + .div = { CGU_REG_PCMCDR, 0, 1, 8, 28, 27, 26 }, + }, + + [JZ4780_CLK_PCM] = { + "pcm", CGU_CLK_MUX | CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, JZ4780_CLK_PCMPLL, -1, -1 }, + .mux = { CGU_REG_PCMCDR, 31, 1 }, + .gate = { CGU_REG_CLKGR1, 3 }, + }, + + [JZ4780_CLK_GPU] = { + "gpu", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL }, + .mux = { CGU_REG_GPUCDR, 30, 2 }, + .div = { CGU_REG_GPUCDR, 0, 1, 4, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR1, 4 }, + }, + + [JZ4780_CLK_HDMI] = { + "hdmi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_VPLL, -1 }, + .mux = { CGU_REG_HDMICDR, 30, 2 }, + .div = { CGU_REG_HDMICDR, 0, 1, 8, 29, 28, 26 }, + .gate = { CGU_REG_CLKGR1, 9 }, + }, + + [JZ4780_CLK_BCH] = { + "bch", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, + JZ4780_CLK_EPLL }, + .mux = { CGU_REG_BCHCDR, 30, 2 }, + .div = { CGU_REG_BCHCDR, 0, 1, 4, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 1 }, + }, + + [JZ4780_CLK_EXCLK_DIV512] = { + "exclk_div512", CGU_CLK_FIXDIV, + .parents = { JZ4780_CLK_EXCLK }, + .fixdiv = { 512 }, + }, + + [JZ4780_CLK_RTC] = { + "rtc_ercs", CGU_CLK_MUX | CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK_DIV512, JZ4780_CLK_RTCLK }, + .mux = { CGU_REG_OPCR, 2, 1}, + }, + + /* Gate-only clocks */ + + [JZ4780_CLK_NEMC] = { + "nemc", CGU_CLK_GATE, + .parents = { JZ4780_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 0 }, + }, + + [JZ4780_CLK_OTG0] = { + "otg0", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 2 }, + }, + + [JZ4780_CLK_SSI0] = { + "ssi0", CGU_CLK_GATE, + .parents = { JZ4780_CLK_SSI, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 4 }, + }, + + [JZ4780_CLK_SMB0] = { + "smb0", CGU_CLK_GATE, + .parents = { JZ4780_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 5 }, + }, + + [JZ4780_CLK_SMB1] = { + "smb1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 6 }, + }, + + [JZ4780_CLK_SCC] = { + "scc", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 7 }, + }, + + [JZ4780_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 8 }, + }, + + [JZ4780_CLK_TSSI0] = { + "tssi0", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 9 }, + }, + + [JZ4780_CLK_OWI] = { + "owi", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 10 }, + }, + + [JZ4780_CLK_KBC] = { + "kbc", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 13 }, + }, + + [JZ4780_CLK_SADC] = { + "sadc", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 14 }, + }, + + [JZ4780_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 15 }, + }, + + [JZ4780_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 16 }, + }, + + [JZ4780_CLK_UART2] = { + "uart2", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 17 }, + }, + + [JZ4780_CLK_UART3] = { + "uart3", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 18 }, + }, + + [JZ4780_CLK_SSI1] = { + "ssi1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_SSI, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 19 }, + }, + + [JZ4780_CLK_SSI2] = { + "ssi2", CGU_CLK_GATE, + .parents = { JZ4780_CLK_SSI, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 20 }, + }, + + [JZ4780_CLK_PDMA] = { + "pdma", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 21 }, + }, + + [JZ4780_CLK_GPS] = { + "gps", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 22 }, + }, + + [JZ4780_CLK_MAC] = { + "mac", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 23 }, + }, + + [JZ4780_CLK_SMB2] = { + "smb2", CGU_CLK_GATE, + .parents = { JZ4780_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 24 }, + }, + + [JZ4780_CLK_CIM] = { + "cim", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 26 }, + }, + + [JZ4780_CLK_LCD] = { + "lcd", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 28 }, + }, + + [JZ4780_CLK_TVE] = { + "tve", CGU_CLK_GATE, + .parents = { JZ4780_CLK_LCD, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 27 }, + }, + + [JZ4780_CLK_IPU] = { + "ipu", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 29 }, + }, + + [JZ4780_CLK_DDR0] = { + "ddr0", CGU_CLK_GATE, + .parents = { JZ4780_CLK_DDR, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 30 }, + }, + + [JZ4780_CLK_DDR1] = { + "ddr1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_DDR, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 31 }, + }, + + [JZ4780_CLK_SMB3] = { + "smb3", CGU_CLK_GATE, + .parents = { JZ4780_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 0 }, + }, + + [JZ4780_CLK_TSSI1] = { + "tssi1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 1 }, + }, + + [JZ4780_CLK_COMPRESS] = { + "compress", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 5 }, + }, + + [JZ4780_CLK_AIC1] = { + "aic1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 6 }, + }, + + [JZ4780_CLK_GPVLC] = { + "gpvlc", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 7 }, + }, + + [JZ4780_CLK_OTG1] = { + "otg1", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 8 }, + }, + + [JZ4780_CLK_UART4] = { + "uart4", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 10 }, + }, + + [JZ4780_CLK_AHBMON] = { + "ahb_mon", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 11 }, + }, + + [JZ4780_CLK_SMB4] = { + "smb4", CGU_CLK_GATE, + .parents = { JZ4780_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 12 }, + }, + + [JZ4780_CLK_DES] = { + "des", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 13 }, + }, + + [JZ4780_CLK_X2D] = { + "x2d", CGU_CLK_GATE, + .parents = { JZ4780_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 14 }, + }, + + [JZ4780_CLK_CORE1] = { + "core1", CGU_CLK_CUSTOM, + .parents = { JZ4780_CLK_CPU, -1, -1, -1 }, + .custom = { &jz4780_core1_ops }, + }, + +}; + +static void __init jz4780_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(jz4780_cgu_clocks, + ARRAY_SIZE(jz4780_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) { + pr_err("%s: failed to register CGU Clocks\n", __func__); + return; + } + + ingenic_cgu_register_syscore_ops(cgu); +} +CLK_OF_DECLARE_DRIVER(jz4780_cgu, "ingenic,jz4780-cgu", jz4780_cgu_init); diff --git a/drivers/clk/ingenic/pm.c b/drivers/clk/ingenic/pm.c new file mode 100644 index 000000000..341752b64 --- /dev/null +++ b/drivers/clk/ingenic/pm.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net> + */ + +#include "cgu.h" +#include "pm.h" + +#include <linux/io.h> +#include <linux/syscore_ops.h> + +#define CGU_REG_LCR 0x04 + +#define LCR_LOW_POWER_MODE BIT(0) + +static void __iomem * __maybe_unused ingenic_cgu_base; + +static int __maybe_unused ingenic_cgu_pm_suspend(void) +{ + u32 val = readl(ingenic_cgu_base + CGU_REG_LCR); + + writel(val | LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR); + + return 0; +} + +static void __maybe_unused ingenic_cgu_pm_resume(void) +{ + u32 val = readl(ingenic_cgu_base + CGU_REG_LCR); + + writel(val & ~LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR); +} + +static struct syscore_ops __maybe_unused ingenic_cgu_pm_ops = { + .suspend = ingenic_cgu_pm_suspend, + .resume = ingenic_cgu_pm_resume, +}; + +void ingenic_cgu_register_syscore_ops(struct ingenic_cgu *cgu) +{ + if (IS_ENABLED(CONFIG_PM_SLEEP)) { + ingenic_cgu_base = cgu->base; + register_syscore_ops(&ingenic_cgu_pm_ops); + } +} diff --git a/drivers/clk/ingenic/pm.h b/drivers/clk/ingenic/pm.h new file mode 100644 index 000000000..fa7540407 --- /dev/null +++ b/drivers/clk/ingenic/pm.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net> + */ +#ifndef DRIVERS_CLK_INGENIC_PM_H +#define DRIVERS_CLK_INGENIC_PM_H + +struct ingenic_cgu; + +void ingenic_cgu_register_syscore_ops(struct ingenic_cgu *cgu); + +#endif /* DRIVERS_CLK_INGENIC_PM_H */ diff --git a/drivers/clk/ingenic/tcu.c b/drivers/clk/ingenic/tcu.c new file mode 100644 index 000000000..d5544cbc5 --- /dev/null +++ b/drivers/clk/ingenic/tcu.c @@ -0,0 +1,493 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * JZ47xx SoCs TCU clocks driver + * Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net> + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clockchips.h> +#include <linux/mfd/ingenic-tcu.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/syscore_ops.h> + +#include <dt-bindings/clock/ingenic,tcu.h> + +/* 8 channels max + watchdog + OST */ +#define TCU_CLK_COUNT 10 + +#undef pr_fmt +#define pr_fmt(fmt) "ingenic-tcu-clk: " fmt + +enum tcu_clk_parent { + TCU_PARENT_PCLK, + TCU_PARENT_RTC, + TCU_PARENT_EXT, +}; + +struct ingenic_soc_info { + unsigned int num_channels; + bool has_ost; + bool has_tcu_clk; + bool allow_missing_tcu_clk; +}; + +struct ingenic_tcu_clk_info { + struct clk_init_data init_data; + u8 gate_bit; + u8 tcsr_reg; +}; + +struct ingenic_tcu_clk { + struct clk_hw hw; + unsigned int idx; + struct ingenic_tcu *tcu; + const struct ingenic_tcu_clk_info *info; +}; + +struct ingenic_tcu { + const struct ingenic_soc_info *soc_info; + struct regmap *map; + struct clk *clk; + + struct clk_hw_onecell_data *clocks; +}; + +static struct ingenic_tcu *ingenic_tcu; + +static inline struct ingenic_tcu_clk *to_tcu_clk(struct clk_hw *hw) +{ + return container_of(hw, struct ingenic_tcu_clk, hw); +} + +static int ingenic_tcu_enable(struct clk_hw *hw) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + struct ingenic_tcu *tcu = tcu_clk->tcu; + + regmap_write(tcu->map, TCU_REG_TSCR, BIT(info->gate_bit)); + + return 0; +} + +static void ingenic_tcu_disable(struct clk_hw *hw) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + struct ingenic_tcu *tcu = tcu_clk->tcu; + + regmap_write(tcu->map, TCU_REG_TSSR, BIT(info->gate_bit)); +} + +static int ingenic_tcu_is_enabled(struct clk_hw *hw) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + unsigned int value; + + regmap_read(tcu_clk->tcu->map, TCU_REG_TSR, &value); + + return !(value & BIT(info->gate_bit)); +} + +static bool ingenic_tcu_enable_regs(struct clk_hw *hw) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + struct ingenic_tcu *tcu = tcu_clk->tcu; + bool enabled = false; + + /* + * According to the programming manual, a timer channel's registers can + * only be accessed when the channel's stop bit is clear. + */ + enabled = !!ingenic_tcu_is_enabled(hw); + regmap_write(tcu->map, TCU_REG_TSCR, BIT(info->gate_bit)); + + return enabled; +} + +static void ingenic_tcu_disable_regs(struct clk_hw *hw) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + struct ingenic_tcu *tcu = tcu_clk->tcu; + + regmap_write(tcu->map, TCU_REG_TSSR, BIT(info->gate_bit)); +} + +static u8 ingenic_tcu_get_parent(struct clk_hw *hw) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + unsigned int val = 0; + int ret; + + ret = regmap_read(tcu_clk->tcu->map, info->tcsr_reg, &val); + WARN_ONCE(ret < 0, "Unable to read TCSR %d", tcu_clk->idx); + + return ffs(val & TCU_TCSR_PARENT_CLOCK_MASK) - 1; +} + +static int ingenic_tcu_set_parent(struct clk_hw *hw, u8 idx) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + bool was_enabled; + int ret; + + was_enabled = ingenic_tcu_enable_regs(hw); + + ret = regmap_update_bits(tcu_clk->tcu->map, info->tcsr_reg, + TCU_TCSR_PARENT_CLOCK_MASK, BIT(idx)); + WARN_ONCE(ret < 0, "Unable to update TCSR %d", tcu_clk->idx); + + if (!was_enabled) + ingenic_tcu_disable_regs(hw); + + return 0; +} + +static unsigned long ingenic_tcu_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + unsigned int prescale; + int ret; + + ret = regmap_read(tcu_clk->tcu->map, info->tcsr_reg, &prescale); + WARN_ONCE(ret < 0, "Unable to read TCSR %d", tcu_clk->idx); + + prescale = (prescale & TCU_TCSR_PRESCALE_MASK) >> TCU_TCSR_PRESCALE_LSB; + + return parent_rate >> (prescale * 2); +} + +static u8 ingenic_tcu_get_prescale(unsigned long rate, unsigned long req_rate) +{ + u8 prescale; + + for (prescale = 0; prescale < 5; prescale++) + if ((rate >> (prescale * 2)) <= req_rate) + return prescale; + + return 5; /* /1024 divider */ +} + +static long ingenic_tcu_round_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long *parent_rate) +{ + unsigned long rate = *parent_rate; + u8 prescale; + + if (req_rate > rate) + return rate; + + prescale = ingenic_tcu_get_prescale(rate, req_rate); + + return rate >> (prescale * 2); +} + +static int ingenic_tcu_set_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long parent_rate) +{ + struct ingenic_tcu_clk *tcu_clk = to_tcu_clk(hw); + const struct ingenic_tcu_clk_info *info = tcu_clk->info; + u8 prescale = ingenic_tcu_get_prescale(parent_rate, req_rate); + bool was_enabled; + int ret; + + was_enabled = ingenic_tcu_enable_regs(hw); + + ret = regmap_update_bits(tcu_clk->tcu->map, info->tcsr_reg, + TCU_TCSR_PRESCALE_MASK, + prescale << TCU_TCSR_PRESCALE_LSB); + WARN_ONCE(ret < 0, "Unable to update TCSR %d", tcu_clk->idx); + + if (!was_enabled) + ingenic_tcu_disable_regs(hw); + + return 0; +} + +static const struct clk_ops ingenic_tcu_clk_ops = { + .get_parent = ingenic_tcu_get_parent, + .set_parent = ingenic_tcu_set_parent, + + .recalc_rate = ingenic_tcu_recalc_rate, + .round_rate = ingenic_tcu_round_rate, + .set_rate = ingenic_tcu_set_rate, + + .enable = ingenic_tcu_enable, + .disable = ingenic_tcu_disable, + .is_enabled = ingenic_tcu_is_enabled, +}; + +static const char * const ingenic_tcu_timer_parents[] = { + [TCU_PARENT_PCLK] = "pclk", + [TCU_PARENT_RTC] = "rtc", + [TCU_PARENT_EXT] = "ext", +}; + +#define DEF_TIMER(_name, _gate_bit, _tcsr) \ + { \ + .init_data = { \ + .name = _name, \ + .parent_names = ingenic_tcu_timer_parents, \ + .num_parents = ARRAY_SIZE(ingenic_tcu_timer_parents),\ + .ops = &ingenic_tcu_clk_ops, \ + .flags = CLK_SET_RATE_UNGATE, \ + }, \ + .gate_bit = _gate_bit, \ + .tcsr_reg = _tcsr, \ + } +static const struct ingenic_tcu_clk_info ingenic_tcu_clk_info[] = { + [TCU_CLK_TIMER0] = DEF_TIMER("timer0", 0, TCU_REG_TCSRc(0)), + [TCU_CLK_TIMER1] = DEF_TIMER("timer1", 1, TCU_REG_TCSRc(1)), + [TCU_CLK_TIMER2] = DEF_TIMER("timer2", 2, TCU_REG_TCSRc(2)), + [TCU_CLK_TIMER3] = DEF_TIMER("timer3", 3, TCU_REG_TCSRc(3)), + [TCU_CLK_TIMER4] = DEF_TIMER("timer4", 4, TCU_REG_TCSRc(4)), + [TCU_CLK_TIMER5] = DEF_TIMER("timer5", 5, TCU_REG_TCSRc(5)), + [TCU_CLK_TIMER6] = DEF_TIMER("timer6", 6, TCU_REG_TCSRc(6)), + [TCU_CLK_TIMER7] = DEF_TIMER("timer7", 7, TCU_REG_TCSRc(7)), +}; + +static const struct ingenic_tcu_clk_info ingenic_tcu_watchdog_clk_info = + DEF_TIMER("wdt", 16, TCU_REG_WDT_TCSR); +static const struct ingenic_tcu_clk_info ingenic_tcu_ost_clk_info = + DEF_TIMER("ost", 15, TCU_REG_OST_TCSR); +#undef DEF_TIMER + +static int __init ingenic_tcu_register_clock(struct ingenic_tcu *tcu, + unsigned int idx, enum tcu_clk_parent parent, + const struct ingenic_tcu_clk_info *info, + struct clk_hw_onecell_data *clocks) +{ + struct ingenic_tcu_clk *tcu_clk; + int err; + + tcu_clk = kzalloc(sizeof(*tcu_clk), GFP_KERNEL); + if (!tcu_clk) + return -ENOMEM; + + tcu_clk->hw.init = &info->init_data; + tcu_clk->idx = idx; + tcu_clk->info = info; + tcu_clk->tcu = tcu; + + /* Reset channel and clock divider, set default parent */ + ingenic_tcu_enable_regs(&tcu_clk->hw); + regmap_update_bits(tcu->map, info->tcsr_reg, 0xffff, BIT(parent)); + ingenic_tcu_disable_regs(&tcu_clk->hw); + + err = clk_hw_register(NULL, &tcu_clk->hw); + if (err) { + kfree(tcu_clk); + return err; + } + + clocks->hws[idx] = &tcu_clk->hw; + + return 0; +} + +static const struct ingenic_soc_info jz4740_soc_info = { + .num_channels = 8, + .has_ost = false, + .has_tcu_clk = true, +}; + +static const struct ingenic_soc_info jz4725b_soc_info = { + .num_channels = 6, + .has_ost = true, + .has_tcu_clk = true, +}; + +static const struct ingenic_soc_info jz4770_soc_info = { + .num_channels = 8, + .has_ost = true, + .has_tcu_clk = false, +}; + +static const struct ingenic_soc_info x1000_soc_info = { + .num_channels = 8, + .has_ost = false, /* X1000 has OST, but it not belong TCU */ + .has_tcu_clk = true, + .allow_missing_tcu_clk = true, +}; + +static const struct of_device_id __maybe_unused ingenic_tcu_of_match[] __initconst = { + { .compatible = "ingenic,jz4740-tcu", .data = &jz4740_soc_info, }, + { .compatible = "ingenic,jz4725b-tcu", .data = &jz4725b_soc_info, }, + { .compatible = "ingenic,jz4760-tcu", .data = &jz4770_soc_info, }, + { .compatible = "ingenic,jz4770-tcu", .data = &jz4770_soc_info, }, + { .compatible = "ingenic,x1000-tcu", .data = &x1000_soc_info, }, + { /* sentinel */ } +}; + +static int __init ingenic_tcu_probe(struct device_node *np) +{ + const struct of_device_id *id = of_match_node(ingenic_tcu_of_match, np); + struct ingenic_tcu *tcu; + struct regmap *map; + unsigned int i; + int ret; + + map = device_node_to_regmap(np); + if (IS_ERR(map)) + return PTR_ERR(map); + + tcu = kzalloc(sizeof(*tcu), GFP_KERNEL); + if (!tcu) + return -ENOMEM; + + tcu->map = map; + tcu->soc_info = id->data; + + if (tcu->soc_info->has_tcu_clk) { + tcu->clk = of_clk_get_by_name(np, "tcu"); + if (IS_ERR(tcu->clk)) { + ret = PTR_ERR(tcu->clk); + + /* + * Old device trees for some SoCs did not include the + * TCU clock because this driver (incorrectly) didn't + * use it. In this case we complain loudly and attempt + * to continue without the clock, which might work if + * booting with workarounds like "clk_ignore_unused". + */ + if (tcu->soc_info->allow_missing_tcu_clk && ret == -EINVAL) { + pr_warn("TCU clock missing from device tree, please update your device tree\n"); + tcu->clk = NULL; + } else { + pr_crit("Cannot get TCU clock from device tree\n"); + goto err_free_tcu; + } + } else { + ret = clk_prepare_enable(tcu->clk); + if (ret) { + pr_crit("Unable to enable TCU clock\n"); + goto err_put_clk; + } + } + } + + tcu->clocks = kzalloc(struct_size(tcu->clocks, hws, TCU_CLK_COUNT), + GFP_KERNEL); + if (!tcu->clocks) { + ret = -ENOMEM; + goto err_clk_disable; + } + + tcu->clocks->num = TCU_CLK_COUNT; + + for (i = 0; i < tcu->soc_info->num_channels; i++) { + ret = ingenic_tcu_register_clock(tcu, i, TCU_PARENT_EXT, + &ingenic_tcu_clk_info[i], + tcu->clocks); + if (ret) { + pr_crit("cannot register clock %d\n", i); + goto err_unregister_timer_clocks; + } + } + + /* + * We set EXT as the default parent clock for all the TCU clocks + * except for the watchdog one, where we set the RTC clock as the + * parent. Since the EXT and PCLK are much faster than the RTC clock, + * the watchdog would kick after a maximum time of 5s, and we might + * want a slower kicking time. + */ + ret = ingenic_tcu_register_clock(tcu, TCU_CLK_WDT, TCU_PARENT_RTC, + &ingenic_tcu_watchdog_clk_info, + tcu->clocks); + if (ret) { + pr_crit("cannot register watchdog clock\n"); + goto err_unregister_timer_clocks; + } + + if (tcu->soc_info->has_ost) { + ret = ingenic_tcu_register_clock(tcu, TCU_CLK_OST, + TCU_PARENT_EXT, + &ingenic_tcu_ost_clk_info, + tcu->clocks); + if (ret) { + pr_crit("cannot register ost clock\n"); + goto err_unregister_watchdog_clock; + } + } + + ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, tcu->clocks); + if (ret) { + pr_crit("cannot add OF clock provider\n"); + goto err_unregister_ost_clock; + } + + ingenic_tcu = tcu; + + return 0; + +err_unregister_ost_clock: + if (tcu->soc_info->has_ost) + clk_hw_unregister(tcu->clocks->hws[i + 1]); +err_unregister_watchdog_clock: + clk_hw_unregister(tcu->clocks->hws[i]); +err_unregister_timer_clocks: + for (i = 0; i < tcu->clocks->num; i++) + if (tcu->clocks->hws[i]) + clk_hw_unregister(tcu->clocks->hws[i]); + kfree(tcu->clocks); +err_clk_disable: + if (tcu->clk) + clk_disable_unprepare(tcu->clk); +err_put_clk: + if (tcu->clk) + clk_put(tcu->clk); +err_free_tcu: + kfree(tcu); + return ret; +} + +static int __maybe_unused tcu_pm_suspend(void) +{ + struct ingenic_tcu *tcu = ingenic_tcu; + + if (tcu->clk) + clk_disable(tcu->clk); + + return 0; +} + +static void __maybe_unused tcu_pm_resume(void) +{ + struct ingenic_tcu *tcu = ingenic_tcu; + + if (tcu->clk) + clk_enable(tcu->clk); +} + +static struct syscore_ops __maybe_unused tcu_pm_ops = { + .suspend = tcu_pm_suspend, + .resume = tcu_pm_resume, +}; + +static void __init ingenic_tcu_init(struct device_node *np) +{ + int ret = ingenic_tcu_probe(np); + + if (ret) + pr_crit("Failed to initialize TCU clocks: %d\n", ret); + + if (IS_ENABLED(CONFIG_PM_SLEEP)) + register_syscore_ops(&tcu_pm_ops); +} + +CLK_OF_DECLARE_DRIVER(jz4740_cgu, "ingenic,jz4740-tcu", ingenic_tcu_init); +CLK_OF_DECLARE_DRIVER(jz4725b_cgu, "ingenic,jz4725b-tcu", ingenic_tcu_init); +CLK_OF_DECLARE_DRIVER(jz4760_cgu, "ingenic,jz4760-tcu", ingenic_tcu_init); +CLK_OF_DECLARE_DRIVER(jz4770_cgu, "ingenic,jz4770-tcu", ingenic_tcu_init); +CLK_OF_DECLARE_DRIVER(x1000_cgu, "ingenic,x1000-tcu", ingenic_tcu_init); diff --git a/drivers/clk/ingenic/x1000-cgu.c b/drivers/clk/ingenic/x1000-cgu.c new file mode 100644 index 000000000..b2ce3fb83 --- /dev/null +++ b/drivers/clk/ingenic/x1000-cgu.c @@ -0,0 +1,495 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * X1000 SoC CGU driver + * Copyright (c) 2019 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> + */ + +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of.h> + +#include <dt-bindings/clock/ingenic,x1000-cgu.h> + +#include "cgu.h" +#include "pm.h" + +/* CGU register offsets */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_APLL 0x10 +#define CGU_REG_MPLL 0x14 +#define CGU_REG_CLKGR 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_DDRCDR 0x2c +#define CGU_REG_USBPCR 0x3c +#define CGU_REG_USBPCR1 0x48 +#define CGU_REG_USBCDR 0x50 +#define CGU_REG_MACCDR 0x54 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSC0CDR 0x68 +#define CGU_REG_I2SCDR1 0x70 +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x7c +#define CGU_REG_PCMCDR 0x84 +#define CGU_REG_MSC1CDR 0xa4 +#define CGU_REG_CMP_INTR 0xb0 +#define CGU_REG_CMP_INTRE 0xb4 +#define CGU_REG_DRCG 0xd0 +#define CGU_REG_CPCSR 0xd4 +#define CGU_REG_PCMCDR1 0xe0 +#define CGU_REG_MACPHYC 0xe8 + +/* bits within the OPCR register */ +#define OPCR_SPENDN0 BIT(7) +#define OPCR_SPENDN1 BIT(6) + +/* bits within the USBPCR register */ +#define USBPCR_SIDDQ BIT(21) +#define USBPCR_OTG_DISABLE BIT(20) + +/* bits within the USBPCR1 register */ +#define USBPCR1_REFCLKSEL_SHIFT 26 +#define USBPCR1_REFCLKSEL_MASK (0x3 << USBPCR1_REFCLKSEL_SHIFT) +#define USBPCR1_REFCLKSEL_CORE (0x2 << USBPCR1_REFCLKSEL_SHIFT) +#define USBPCR1_REFCLKDIV_SHIFT 24 +#define USBPCR1_REFCLKDIV_MASK (0x3 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_48 (0x2 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_24 (0x1 << USBPCR1_REFCLKDIV_SHIFT) +#define USBPCR1_REFCLKDIV_12 (0x0 << USBPCR1_REFCLKDIV_SHIFT) + +static struct ingenic_cgu *cgu; + +static unsigned long x1000_otg_phy_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u32 usbpcr1; + unsigned refclk_div; + + usbpcr1 = readl(cgu->base + CGU_REG_USBPCR1); + refclk_div = usbpcr1 & USBPCR1_REFCLKDIV_MASK; + + switch (refclk_div) { + case USBPCR1_REFCLKDIV_12: + return 12000000; + + case USBPCR1_REFCLKDIV_24: + return 24000000; + + case USBPCR1_REFCLKDIV_48: + return 48000000; + } + + return parent_rate; +} + +static long x1000_otg_phy_round_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long *parent_rate) +{ + if (req_rate < 18000000) + return 12000000; + + if (req_rate < 36000000) + return 24000000; + + return 48000000; +} + +static int x1000_otg_phy_set_rate(struct clk_hw *hw, unsigned long req_rate, + unsigned long parent_rate) +{ + unsigned long flags; + u32 usbpcr1, div_bits; + + switch (req_rate) { + case 12000000: + div_bits = USBPCR1_REFCLKDIV_12; + break; + + case 24000000: + div_bits = USBPCR1_REFCLKDIV_24; + break; + + case 48000000: + div_bits = USBPCR1_REFCLKDIV_48; + break; + + default: + return -EINVAL; + } + + spin_lock_irqsave(&cgu->lock, flags); + + usbpcr1 = readl(cgu->base + CGU_REG_USBPCR1); + usbpcr1 &= ~USBPCR1_REFCLKDIV_MASK; + usbpcr1 |= div_bits; + writel(usbpcr1, cgu->base + CGU_REG_USBPCR1); + + spin_unlock_irqrestore(&cgu->lock, flags); + return 0; +} + +static int x1000_usb_phy_enable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel(readl(reg_opcr) | OPCR_SPENDN0, reg_opcr); + writel(readl(reg_usbpcr) & ~USBPCR_OTG_DISABLE & ~USBPCR_SIDDQ, reg_usbpcr); + return 0; +} + +static void x1000_usb_phy_disable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel(readl(reg_opcr) & ~OPCR_SPENDN0, reg_opcr); + writel(readl(reg_usbpcr) | USBPCR_OTG_DISABLE | USBPCR_SIDDQ, reg_usbpcr); +} + +static int x1000_usb_phy_is_enabled(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + return (readl(reg_opcr) & OPCR_SPENDN0) && + !(readl(reg_usbpcr) & USBPCR_SIDDQ) && + !(readl(reg_usbpcr) & USBPCR_OTG_DISABLE); +} + +static const struct clk_ops x1000_otg_phy_ops = { + .recalc_rate = x1000_otg_phy_recalc_rate, + .round_rate = x1000_otg_phy_round_rate, + .set_rate = x1000_otg_phy_set_rate, + + .enable = x1000_usb_phy_enable, + .disable = x1000_usb_phy_disable, + .is_enabled = x1000_usb_phy_is_enabled, +}; + +static const s8 pll_od_encoding[8] = { + 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3, +}; + +static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { + + /* External clocks */ + + [X1000_CLK_EXCLK] = { "ext", CGU_CLK_EXT }, + [X1000_CLK_RTCLK] = { "rtc", CGU_CLK_EXT }, + + /* PLLs */ + + [X1000_CLK_APLL] = { + "apll", CGU_CLK_PLL, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_APLL, + .rate_multiplier = 1, + .m_shift = 24, + .m_bits = 7, + .m_offset = 1, + .n_shift = 18, + .n_bits = 5, + .n_offset = 1, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_APLL, + .bypass_bit = 9, + .enable_bit = 8, + .stable_bit = 10, + }, + }, + + [X1000_CLK_MPLL] = { + "mpll", CGU_CLK_PLL, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_MPLL, + .rate_multiplier = 1, + .m_shift = 24, + .m_bits = 7, + .m_offset = 1, + .n_shift = 18, + .n_bits = 5, + .n_offset = 1, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_MPLL, + .bypass_bit = 6, + .enable_bit = 7, + .stable_bit = 0, + }, + }, + + /* Custom (SoC-specific) OTG PHY */ + + [X1000_CLK_OTGPHY] = { + "otg_phy", CGU_CLK_CUSTOM, + .parents = { -1, -1, X1000_CLK_EXCLK, -1 }, + .custom = { &x1000_otg_phy_ops }, + }, + + /* Muxes & dividers */ + + [X1000_CLK_SCLKA] = { + "sclk_a", CGU_CLK_MUX, + .parents = { -1, X1000_CLK_EXCLK, X1000_CLK_APLL, -1 }, + .mux = { CGU_REG_CPCCR, 30, 2 }, + }, + + [X1000_CLK_CPUMUX] = { + "cpu_mux", CGU_CLK_MUX, + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 }, + .mux = { CGU_REG_CPCCR, 28, 2 }, + }, + + [X1000_CLK_CPU] = { + "cpu", CGU_CLK_DIV | CGU_CLK_GATE, + /* + * Disabling the CPU clock or any parent clocks will hang the + * system; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { X1000_CLK_CPUMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 }, + .gate = { CGU_REG_CLKGR, 30 }, + }, + + [X1000_CLK_L2CACHE] = { + "l2cache", CGU_CLK_DIV, + /* + * The L2 cache clock is critical if caches are enabled and + * disabling it or any parent clocks will hang the system. + */ + .flags = CLK_IS_CRITICAL, + .parents = { X1000_CLK_CPUMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 }, + }, + + [X1000_CLK_AHB0] = { + "ahb0", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 }, + .mux = { CGU_REG_CPCCR, 26, 2 }, + .div = { CGU_REG_CPCCR, 8, 1, 4, 21, -1, -1 }, + }, + + [X1000_CLK_AHB2PMUX] = { + "ahb2_apb_mux", CGU_CLK_MUX, + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 }, + .mux = { CGU_REG_CPCCR, 24, 2 }, + }, + + [X1000_CLK_AHB2] = { + "ahb2", CGU_CLK_DIV, + .parents = { X1000_CLK_AHB2PMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 12, 1, 4, 20, -1, -1 }, + }, + + [X1000_CLK_PCLK] = { + "pclk", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1000_CLK_AHB2PMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 16, 1, 4, 20, -1, -1 }, + .gate = { CGU_REG_CLKGR, 28 }, + }, + + [X1000_CLK_DDR] = { + "ddr", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + /* + * Disabling DDR clock or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 }, + .mux = { CGU_REG_DDRCDR, 30, 2 }, + .div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR, 31 }, + }, + + [X1000_CLK_MAC] = { + "mac", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL }, + .mux = { CGU_REG_MACCDR, 31, 1 }, + .div = { CGU_REG_MACCDR, 0, 1, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR, 25 }, + }, + + [X1000_CLK_LCD] = { + "lcd", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL }, + .mux = { CGU_REG_LPCDR, 31, 1 }, + .div = { CGU_REG_LPCDR, 0, 1, 8, 28, 27, 26 }, + .gate = { CGU_REG_CLKGR, 23 }, + }, + + [X1000_CLK_MSCMUX] = { + "msc_mux", CGU_CLK_MUX, + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL}, + .mux = { CGU_REG_MSC0CDR, 31, 1 }, + }, + + [X1000_CLK_MSC0] = { + "msc0", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1000_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC0CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR, 4 }, + }, + + [X1000_CLK_MSC1] = { + "msc1", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1000_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC1CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR, 5 }, + }, + + [X1000_CLK_OTG] = { + "otg", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { X1000_CLK_EXCLK, -1, + X1000_CLK_APLL, X1000_CLK_MPLL }, + .mux = { CGU_REG_USBCDR, 30, 2 }, + .div = { CGU_REG_USBCDR, 0, 1, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR, 3 }, + }, + + [X1000_CLK_SSIPLL] = { + "ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL, -1, -1 }, + .mux = { CGU_REG_SSICDR, 31, 1 }, + .div = { CGU_REG_SSICDR, 0, 1, 8, 29, 28, 27 }, + }, + + [X1000_CLK_SSIPLL_DIV2] = { + "ssi_pll_div2", CGU_CLK_FIXDIV, + .parents = { X1000_CLK_SSIPLL }, + .fixdiv = { 2 }, + }, + + [X1000_CLK_SSIMUX] = { + "ssi_mux", CGU_CLK_MUX, + .parents = { X1000_CLK_EXCLK, X1000_CLK_SSIPLL_DIV2, -1, -1 }, + .mux = { CGU_REG_SSICDR, 30, 1 }, + }, + + [X1000_CLK_EXCLK_DIV512] = { + "exclk_div512", CGU_CLK_FIXDIV, + .parents = { X1000_CLK_EXCLK }, + .fixdiv = { 512 }, + }, + + [X1000_CLK_RTC] = { + "rtc_ercs", CGU_CLK_MUX | CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK_DIV512, X1000_CLK_RTCLK }, + .mux = { CGU_REG_OPCR, 2, 1}, + .gate = { CGU_REG_CLKGR, 27 }, + }, + + /* Gate-only clocks */ + + [X1000_CLK_EMC] = { + "emc", CGU_CLK_GATE, + .parents = { X1000_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 0 }, + }, + + [X1000_CLK_EFUSE] = { + "efuse", CGU_CLK_GATE, + .parents = { X1000_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 1 }, + }, + + [X1000_CLK_SFC] = { + "sfc", CGU_CLK_GATE, + .parents = { X1000_CLK_SSIPLL, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 2 }, + }, + + [X1000_CLK_I2C0] = { + "i2c0", CGU_CLK_GATE, + .parents = { X1000_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 7 }, + }, + + [X1000_CLK_I2C1] = { + "i2c1", CGU_CLK_GATE, + .parents = { X1000_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 8 }, + }, + + [X1000_CLK_I2C2] = { + "i2c2", CGU_CLK_GATE, + .parents = { X1000_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 9 }, + }, + + [X1000_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 14 }, + }, + + [X1000_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 15 }, + }, + + [X1000_CLK_UART2] = { + "uart2", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 16 }, + }, + + [X1000_CLK_TCU] = { + "tcu", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 18 }, + }, + + [X1000_CLK_SSI] = { + "ssi", CGU_CLK_GATE, + .parents = { X1000_CLK_SSIMUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 19 }, + }, + + [X1000_CLK_OST] = { + "ost", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 20 }, + }, + + [X1000_CLK_PDMA] = { + "pdma", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 21 }, + }, +}; + +static void __init x1000_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(x1000_cgu_clocks, + ARRAY_SIZE(x1000_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) { + pr_err("%s: failed to register CGU Clocks\n", __func__); + return; + } + + ingenic_cgu_register_syscore_ops(cgu); +} +/* + * CGU has some children devices, this is useful for probing children devices + * in the case where the device node is compatible with "simple-mfd". + */ +CLK_OF_DECLARE_DRIVER(x1000_cgu, "ingenic,x1000-cgu", x1000_cgu_init); diff --git a/drivers/clk/ingenic/x1830-cgu.c b/drivers/clk/ingenic/x1830-cgu.c new file mode 100644 index 000000000..0fd46e50a --- /dev/null +++ b/drivers/clk/ingenic/x1830-cgu.c @@ -0,0 +1,472 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * X1830 SoC CGU driver + * Copyright (c) 2019 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> + */ + +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of.h> + +#include <dt-bindings/clock/ingenic,x1830-cgu.h> + +#include "cgu.h" +#include "pm.h" + +/* CGU register offsets */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_CPPCR 0x0c +#define CGU_REG_APLL 0x10 +#define CGU_REG_MPLL 0x14 +#define CGU_REG_CLKGR0 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_CLKGR1 0x28 +#define CGU_REG_DDRCDR 0x2c +#define CGU_REG_USBPCR 0x3c +#define CGU_REG_USBRDT 0x40 +#define CGU_REG_USBVBFIL 0x44 +#define CGU_REG_USBPCR1 0x48 +#define CGU_REG_MACCDR 0x54 +#define CGU_REG_EPLL 0x58 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSC0CDR 0x68 +#define CGU_REG_I2SCDR1 0x70 +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x7c +#define CGU_REG_MSC1CDR 0xa4 +#define CGU_REG_CMP_INTR 0xb0 +#define CGU_REG_CMP_INTRE 0xb4 +#define CGU_REG_DRCG 0xd0 +#define CGU_REG_CPCSR 0xd4 +#define CGU_REG_VPLL 0xe0 +#define CGU_REG_MACPHYC 0xe8 + +/* bits within the OPCR register */ +#define OPCR_GATE_USBPHYCLK BIT(23) +#define OPCR_SPENDN0 BIT(7) +#define OPCR_SPENDN1 BIT(6) + +/* bits within the USBPCR register */ +#define USBPCR_SIDDQ BIT(21) +#define USBPCR_OTG_DISABLE BIT(20) + +static struct ingenic_cgu *cgu; + +static int x1830_usb_phy_enable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel((readl(reg_opcr) | OPCR_SPENDN0) & ~OPCR_GATE_USBPHYCLK, reg_opcr); + writel(readl(reg_usbpcr) & ~USBPCR_OTG_DISABLE & ~USBPCR_SIDDQ, reg_usbpcr); + return 0; +} + +static void x1830_usb_phy_disable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel((readl(reg_opcr) & ~OPCR_SPENDN0) | OPCR_GATE_USBPHYCLK, reg_opcr); + writel(readl(reg_usbpcr) | USBPCR_OTG_DISABLE | USBPCR_SIDDQ, reg_usbpcr); +} + +static int x1830_usb_phy_is_enabled(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + return (readl(reg_opcr) & OPCR_SPENDN0) && + !(readl(reg_usbpcr) & USBPCR_SIDDQ) && + !(readl(reg_usbpcr) & USBPCR_OTG_DISABLE); +} + +static const struct clk_ops x1830_otg_phy_ops = { + .enable = x1830_usb_phy_enable, + .disable = x1830_usb_phy_disable, + .is_enabled = x1830_usb_phy_is_enabled, +}; + +static const s8 pll_od_encoding[64] = { + 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3, + -1, -1, -1, -1, -1, -1, -1, 0x4, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, 0x5, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, 0x6, +}; + +static const struct ingenic_cgu_clk_info x1830_cgu_clocks[] = { + + /* External clocks */ + + [X1830_CLK_EXCLK] = { "ext", CGU_CLK_EXT }, + [X1830_CLK_RTCLK] = { "rtc", CGU_CLK_EXT }, + + /* PLLs */ + + [X1830_CLK_APLL] = { + "apll", CGU_CLK_PLL, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_APLL, + .rate_multiplier = 2, + .m_shift = 20, + .m_bits = 9, + .m_offset = 1, + .n_shift = 14, + .n_bits = 6, + .n_offset = 1, + .od_shift = 11, + .od_bits = 3, + .od_max = 64, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_CPPCR, + .bypass_bit = 30, + .enable_bit = 0, + .stable_bit = 3, + }, + }, + + [X1830_CLK_MPLL] = { + "mpll", CGU_CLK_PLL, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_MPLL, + .rate_multiplier = 2, + .m_shift = 20, + .m_bits = 9, + .m_offset = 1, + .n_shift = 14, + .n_bits = 6, + .n_offset = 1, + .od_shift = 11, + .od_bits = 3, + .od_max = 64, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_CPPCR, + .bypass_bit = 28, + .enable_bit = 0, + .stable_bit = 3, + }, + }, + + [X1830_CLK_EPLL] = { + "epll", CGU_CLK_PLL, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_EPLL, + .rate_multiplier = 2, + .m_shift = 20, + .m_bits = 9, + .m_offset = 1, + .n_shift = 14, + .n_bits = 6, + .n_offset = 1, + .od_shift = 11, + .od_bits = 3, + .od_max = 64, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_CPPCR, + .bypass_bit = 24, + .enable_bit = 0, + .stable_bit = 3, + }, + }, + + [X1830_CLK_VPLL] = { + "vpll", CGU_CLK_PLL, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .pll = { + .reg = CGU_REG_VPLL, + .rate_multiplier = 2, + .m_shift = 20, + .m_bits = 9, + .m_offset = 1, + .n_shift = 14, + .n_bits = 6, + .n_offset = 1, + .od_shift = 11, + .od_bits = 3, + .od_max = 64, + .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_CPPCR, + .bypass_bit = 26, + .enable_bit = 0, + .stable_bit = 3, + }, + }, + + /* Custom (SoC-specific) OTG PHY */ + + [X1830_CLK_OTGPHY] = { + "otg_phy", CGU_CLK_CUSTOM, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .custom = { &x1830_otg_phy_ops }, + }, + + /* Muxes & dividers */ + + [X1830_CLK_SCLKA] = { + "sclk_a", CGU_CLK_MUX, + .parents = { -1, X1830_CLK_EXCLK, X1830_CLK_APLL, -1 }, + .mux = { CGU_REG_CPCCR, 30, 2 }, + }, + + [X1830_CLK_CPUMUX] = { + "cpu_mux", CGU_CLK_MUX, + .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 }, + .mux = { CGU_REG_CPCCR, 28, 2 }, + }, + + [X1830_CLK_CPU] = { + "cpu", CGU_CLK_DIV | CGU_CLK_GATE, + .flags = CLK_IS_CRITICAL, + .parents = { X1830_CLK_CPUMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 15 }, + }, + + [X1830_CLK_L2CACHE] = { + "l2cache", CGU_CLK_DIV, + /* + * The L2 cache clock is critical if caches are enabled and + * disabling it or any parent clocks will hang the system. + */ + .flags = CLK_IS_CRITICAL, + .parents = { X1830_CLK_CPUMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 }, + }, + + [X1830_CLK_AHB0] = { + "ahb0", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 }, + .mux = { CGU_REG_CPCCR, 26, 2 }, + .div = { CGU_REG_CPCCR, 8, 1, 4, 21, -1, -1 }, + }, + + [X1830_CLK_AHB2PMUX] = { + "ahb2_apb_mux", CGU_CLK_MUX, + .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 }, + .mux = { CGU_REG_CPCCR, 24, 2 }, + }, + + [X1830_CLK_AHB2] = { + "ahb2", CGU_CLK_DIV, + .parents = { X1830_CLK_AHB2PMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 12, 1, 4, 20, -1, -1 }, + }, + + [X1830_CLK_PCLK] = { + "pclk", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1830_CLK_AHB2PMUX, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 16, 1, 4, 20, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 14 }, + }, + + [X1830_CLK_DDR] = { + "ddr", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + /* + * Disabling DDR clock or its parents will render DRAM + * inaccessible; mark it critical. + */ + .flags = CLK_IS_CRITICAL, + .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 }, + .mux = { CGU_REG_DDRCDR, 30, 2 }, + .div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 31 }, + }, + + [X1830_CLK_MAC] = { + "mac", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL, + X1830_CLK_VPLL, X1830_CLK_EPLL }, + .mux = { CGU_REG_MACCDR, 30, 2 }, + .div = { CGU_REG_MACCDR, 0, 1, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR1, 4 }, + }, + + [X1830_CLK_LCD] = { + "lcd", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL, + X1830_CLK_VPLL, X1830_CLK_EPLL }, + .mux = { CGU_REG_LPCDR, 30, 2 }, + .div = { CGU_REG_LPCDR, 0, 1, 8, 28, 27, 26 }, + .gate = { CGU_REG_CLKGR1, 9 }, + }, + + [X1830_CLK_MSCMUX] = { + "msc_mux", CGU_CLK_MUX, + .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL, + X1830_CLK_VPLL, X1830_CLK_EPLL }, + .mux = { CGU_REG_MSC0CDR, 30, 2 }, + }, + + [X1830_CLK_MSC0] = { + "msc0", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1830_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC0CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 4 }, + }, + + [X1830_CLK_MSC1] = { + "msc1", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1830_CLK_MSCMUX, -1, -1, -1 }, + .div = { CGU_REG_MSC1CDR, 0, 2, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR0, 5 }, + }, + + [X1830_CLK_SSIPLL] = { + "ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL, + X1830_CLK_VPLL, X1830_CLK_EPLL }, + .mux = { CGU_REG_SSICDR, 30, 2 }, + .div = { CGU_REG_SSICDR, 0, 1, 8, 28, 27, 26 }, + }, + + [X1830_CLK_SSIPLL_DIV2] = { + "ssi_pll_div2", CGU_CLK_FIXDIV, + .parents = { X1830_CLK_SSIPLL }, + .fixdiv = { 2 }, + }, + + [X1830_CLK_SSIMUX] = { + "ssi_mux", CGU_CLK_MUX, + .parents = { X1830_CLK_EXCLK, X1830_CLK_SSIPLL_DIV2, -1, -1 }, + .mux = { CGU_REG_SSICDR, 29, 1 }, + }, + + [X1830_CLK_EXCLK_DIV512] = { + "exclk_div512", CGU_CLK_FIXDIV, + .parents = { X1830_CLK_EXCLK }, + .fixdiv = { 512 }, + }, + + [X1830_CLK_RTC] = { + "rtc_ercs", CGU_CLK_MUX | CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK_DIV512, X1830_CLK_RTCLK }, + .mux = { CGU_REG_OPCR, 2, 1}, + .gate = { CGU_REG_CLKGR0, 29 }, + }, + + /* Gate-only clocks */ + + [X1830_CLK_EMC] = { + "emc", CGU_CLK_GATE, + .parents = { X1830_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 0 }, + }, + + [X1830_CLK_EFUSE] = { + "efuse", CGU_CLK_GATE, + .parents = { X1830_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 1 }, + }, + + [X1830_CLK_OTG] = { + "otg", CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 3 }, + }, + + [X1830_CLK_SSI0] = { + "ssi0", CGU_CLK_GATE, + .parents = { X1830_CLK_SSIMUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 6 }, + }, + + [X1830_CLK_SMB0] = { + "smb0", CGU_CLK_GATE, + .parents = { X1830_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 7 }, + }, + + [X1830_CLK_SMB1] = { + "smb1", CGU_CLK_GATE, + .parents = { X1830_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 8 }, + }, + + [X1830_CLK_SMB2] = { + "smb2", CGU_CLK_GATE, + .parents = { X1830_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 9 }, + }, + + [X1830_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 14 }, + }, + + [X1830_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 15 }, + }, + + [X1830_CLK_SSI1] = { + "ssi1", CGU_CLK_GATE, + .parents = { X1830_CLK_SSIMUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 19 }, + }, + + [X1830_CLK_SFC] = { + "sfc", CGU_CLK_GATE, + .parents = { X1830_CLK_SSIPLL, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 20 }, + }, + + [X1830_CLK_PDMA] = { + "pdma", CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 21 }, + }, + + [X1830_CLK_TCU] = { + "tcu", CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 30 }, + }, + + [X1830_CLK_DTRNG] = { + "dtrng", CGU_CLK_GATE, + .parents = { X1830_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 1 }, + }, + + [X1830_CLK_OST] = { + "ost", CGU_CLK_GATE, + .parents = { X1830_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 11 }, + }, +}; + +static void __init x1830_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(x1830_cgu_clocks, + ARRAY_SIZE(x1830_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) { + pr_err("%s: failed to register CGU Clocks\n", __func__); + return; + } + + ingenic_cgu_register_syscore_ops(cgu); +} +/* + * CGU has some children devices, this is useful for probing children devices + * in the case where the device node is compatible with "simple-mfd". + */ +CLK_OF_DECLARE_DRIVER(x1830_cgu, "ingenic,x1830-cgu", x1830_cgu_init); |