diff options
Diffstat (limited to 'drivers/clk/qcom/clk-alpha-pll.c')
| -rw-r--r-- | drivers/clk/qcom/clk-alpha-pll.c | 370 |
1 files changed, 359 insertions, 11 deletions
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index 8f65b9bdafce..1973d79c9465 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2021, Qualcomm Innovation Center, Inc. All rights reserved. */ #include <linux/kernel.h> @@ -26,6 +27,7 @@ # define PLL_VOTE_FSM_RESET BIT(21) # define PLL_UPDATE BIT(22) # define PLL_UPDATE_BYPASS BIT(23) +# define PLL_FSM_LEGACY_MODE BIT(24) # define PLL_OFFLINE_ACK BIT(28) # define ALPHA_PLL_ACK_LATCH BIT(29) # define PLL_ACTIVE_FLAG BIT(30) @@ -139,6 +141,53 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = { [PLL_OFF_OPMODE] = 0x28, [PLL_OFF_STATUS] = 0x38, }, + [CLK_ALPHA_PLL_TYPE_LUCID_EVO] = { + [PLL_OFF_OPMODE] = 0x04, + [PLL_OFF_STATUS] = 0x0c, + [PLL_OFF_L_VAL] = 0x10, + [PLL_OFF_ALPHA_VAL] = 0x14, + [PLL_OFF_USER_CTL] = 0x18, + [PLL_OFF_USER_CTL_U] = 0x1c, + [PLL_OFF_CONFIG_CTL] = 0x20, + [PLL_OFF_CONFIG_CTL_U] = 0x24, + [PLL_OFF_CONFIG_CTL_U1] = 0x28, + [PLL_OFF_TEST_CTL] = 0x2c, + [PLL_OFF_TEST_CTL_U] = 0x30, + [PLL_OFF_TEST_CTL_U1] = 0x34, + }, + [CLK_ALPHA_PLL_TYPE_RIVIAN_EVO] = { + [PLL_OFF_OPMODE] = 0x04, + [PLL_OFF_STATUS] = 0x0c, + [PLL_OFF_L_VAL] = 0x10, + [PLL_OFF_USER_CTL] = 0x14, + [PLL_OFF_USER_CTL_U] = 0x18, + [PLL_OFF_CONFIG_CTL] = 0x1c, + [PLL_OFF_CONFIG_CTL_U] = 0x20, + [PLL_OFF_CONFIG_CTL_U1] = 0x24, + [PLL_OFF_TEST_CTL] = 0x28, + [PLL_OFF_TEST_CTL_U] = 0x2c, + }, + [CLK_ALPHA_PLL_TYPE_DEFAULT_EVO] = { + [PLL_OFF_L_VAL] = 0x04, + [PLL_OFF_ALPHA_VAL] = 0x08, + [PLL_OFF_ALPHA_VAL_U] = 0x0c, + [PLL_OFF_TEST_CTL] = 0x10, + [PLL_OFF_TEST_CTL_U] = 0x14, + [PLL_OFF_USER_CTL] = 0x18, + [PLL_OFF_USER_CTL_U] = 0x1c, + [PLL_OFF_CONFIG_CTL] = 0x20, + [PLL_OFF_STATUS] = 0x24, + }, + [CLK_ALPHA_PLL_TYPE_BRAMMO_EVO] = { + [PLL_OFF_L_VAL] = 0x04, + [PLL_OFF_ALPHA_VAL] = 0x08, + [PLL_OFF_ALPHA_VAL_U] = 0x0c, + [PLL_OFF_TEST_CTL] = 0x10, + [PLL_OFF_TEST_CTL_U] = 0x14, + [PLL_OFF_USER_CTL] = 0x18, + [PLL_OFF_CONFIG_CTL] = 0x1C, + [PLL_OFF_STATUS] = 0x20, + }, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); @@ -175,6 +224,12 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); #define LUCID_5LPE_PLL_LATCH_INPUT BIT(14) #define LUCID_5LPE_ENABLE_VOTE_RUN BIT(21) +/* LUCID EVO PLL specific settings and offsets */ +#define LUCID_EVO_PCAL_NOT_DONE BIT(8) +#define LUCID_EVO_ENABLE_VOTE_RUN BIT(25) +#define LUCID_EVO_PLL_L_VAL_MASK GENMASK(15, 0) +#define LUCID_EVO_PLL_CAL_L_VAL_SHIFT 16 + /* ZONDA PLL specific */ #define ZONDA_PLL_OUT_MASK 0xf #define ZONDA_STAY_IN_CFA BIT(16) @@ -204,7 +259,7 @@ static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse, if (ret) return ret; - for (count = 100; count > 0; count--) { + for (count = 200; count > 0; count--) { ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val); if (ret) return ret; @@ -1069,6 +1124,10 @@ void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, regmap_update_bits(regmap, PLL_USER_CTL(pll), mask, val); } + if (pll->flags & SUPPORTS_FSM_LEGACY_MODE) + regmap_update_bits(regmap, PLL_MODE(pll), PLL_FSM_LEGACY_MODE, + PLL_FSM_LEGACY_MODE); + regmap_update_bits(regmap, PLL_MODE(pll), PLL_UPDATE_BYPASS, PLL_UPDATE_BYPASS); @@ -1420,7 +1479,7 @@ const struct clk_ops clk_alpha_pll_postdiv_fabia_ops = { EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_fabia_ops); /** - * clk_lucid_pll_configure - configure the lucid pll + * clk_trion_pll_configure - configure the trion pll * * @pll: clk alpha pll * @regmap: register map @@ -1750,24 +1809,32 @@ static int alpha_pll_lucid_5lpe_set_rate(struct clk_hw *hw, unsigned long rate, LUCID_5LPE_ALPHA_PLL_ACK_LATCH); } -static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, - unsigned long parent_rate) +static int __clk_lucid_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate, + unsigned long enable_vote_run) { struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw); - int i, val = 0, div, ret; + struct regmap *regmap = pll->clkr.regmap; + int i, val, div, ret; u32 mask; /* * If the PLL is in FSM mode, then treat set_rate callback as a * no-operation. */ - ret = regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &val); + ret = regmap_read(regmap, PLL_USER_CTL(pll), &val); if (ret) return ret; - if (val & LUCID_5LPE_ENABLE_VOTE_RUN) + if (val & enable_vote_run) return 0; + if (!pll->post_div_table) { + pr_err("Missing the post_div_table for the %s PLL\n", + clk_hw_get_name(&pll->clkr.hw)); + return -EINVAL; + } + div = DIV_ROUND_UP_ULL((u64)parent_rate, rate); for (i = 0; i < pll->num_post_div; i++) { if (pll->post_div_table[i].div == div) { @@ -1781,6 +1848,12 @@ static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long mask, val << pll->post_div_shift); } +static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + return __clk_lucid_pll_postdiv_set_rate(hw, rate, parent_rate, LUCID_5LPE_ENABLE_VOTE_RUN); +} + const struct clk_ops clk_alpha_pll_lucid_5lpe_ops = { .prepare = alpha_pll_lucid_5lpe_prepare, .enable = alpha_pll_lucid_5lpe_enable, @@ -1790,7 +1863,7 @@ const struct clk_ops clk_alpha_pll_lucid_5lpe_ops = { .round_rate = clk_alpha_pll_round_rate, .set_rate = alpha_pll_lucid_5lpe_set_rate, }; -EXPORT_SYMBOL(clk_alpha_pll_lucid_5lpe_ops); +EXPORT_SYMBOL_GPL(clk_alpha_pll_lucid_5lpe_ops); const struct clk_ops clk_alpha_pll_fixed_lucid_5lpe_ops = { .enable = alpha_pll_lucid_5lpe_enable, @@ -1799,14 +1872,14 @@ const struct clk_ops clk_alpha_pll_fixed_lucid_5lpe_ops = { .recalc_rate = clk_trion_pll_recalc_rate, .round_rate = clk_alpha_pll_round_rate, }; -EXPORT_SYMBOL(clk_alpha_pll_fixed_lucid_5lpe_ops); +EXPORT_SYMBOL_GPL(clk_alpha_pll_fixed_lucid_5lpe_ops); const struct clk_ops clk_alpha_pll_postdiv_lucid_5lpe_ops = { .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, .set_rate = clk_lucid_5lpe_pll_postdiv_set_rate, }; -EXPORT_SYMBOL(clk_alpha_pll_postdiv_lucid_5lpe_ops); +EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_lucid_5lpe_ops); void clk_zonda_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, const struct alpha_pll_config *config) @@ -1959,4 +2032,279 @@ const struct clk_ops clk_alpha_pll_zonda_ops = { .round_rate = clk_alpha_pll_round_rate, .set_rate = clk_zonda_pll_set_rate, }; -EXPORT_SYMBOL(clk_alpha_pll_zonda_ops); +EXPORT_SYMBOL_GPL(clk_alpha_pll_zonda_ops); + +void clk_lucid_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, + const struct alpha_pll_config *config) +{ + u32 lval = config->l; + + lval |= TRION_PLL_CAL_VAL << LUCID_EVO_PLL_CAL_L_VAL_SHIFT; + clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), lval); + clk_alpha_pll_write_config(regmap, PLL_ALPHA_VAL(pll), config->alpha); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U(pll), config->config_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U1(pll), config->config_ctl_hi1_val); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL(pll), config->user_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U(pll), config->user_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL(pll), config->test_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U(pll), config->test_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U1(pll), config->test_ctl_hi1_val); + + /* Disable PLL output */ + regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0); + + /* Set operation mode to STANDBY and de-assert the reset */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); +} +EXPORT_SYMBOL_GPL(clk_lucid_evo_pll_configure); + +static int alpha_pll_lucid_evo_enable(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + int ret; + + ret = regmap_read(regmap, PLL_USER_CTL(pll), &val); + if (ret) + return ret; + + /* If in FSM mode, just vote for it */ + if (val & LUCID_EVO_ENABLE_VOTE_RUN) { + ret = clk_enable_regmap(hw); + if (ret) + return ret; + return wait_for_pll_enable_lock(pll); + } + + /* Check if PLL is already enabled */ + ret = trion_pll_is_enabled(pll, regmap); + if (ret < 0) { + return ret; + } else if (ret) { + pr_warn("%s PLL is already enabled\n", clk_hw_get_name(&pll->clkr.hw)); + return 0; + } + + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); + if (ret) + return ret; + + /* Set operation mode to RUN */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_RUN); + + ret = wait_for_pll_enable_lock(pll); + if (ret) + return ret; + + /* Enable the PLL outputs */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), PLL_OUT_MASK, PLL_OUT_MASK); + if (ret) + return ret; + + /* Enable the global PLL outputs */ + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL); + if (ret) + return ret; + + /* Ensure that the write above goes through before returning. */ + mb(); + return ret; +} + +static void _alpha_pll_lucid_evo_disable(struct clk_hw *hw, bool reset) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + int ret; + + ret = regmap_read(regmap, PLL_USER_CTL(pll), &val); + if (ret) + return; + + /* If in FSM mode, just unvote it */ + if (val & LUCID_EVO_ENABLE_VOTE_RUN) { + clk_disable_regmap(hw); + return; + } + + /* Disable the global PLL output */ + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0); + if (ret) + return; + + /* Disable the PLL outputs */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), PLL_OUT_MASK, 0); + if (ret) + return; + + /* Place the PLL mode in STANDBY */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); + + if (reset) + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, 0); +} + +static int _alpha_pll_lucid_evo_prepare(struct clk_hw *hw, bool reset) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct clk_hw *p; + u32 val = 0; + int ret; + + /* Return early if calibration is not needed. */ + regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val); + if (!(val & LUCID_EVO_PCAL_NOT_DONE)) + return 0; + + p = clk_hw_get_parent(hw); + if (!p) + return -EINVAL; + + ret = alpha_pll_lucid_evo_enable(hw); + if (ret) + return ret; + + _alpha_pll_lucid_evo_disable(hw, reset); + + return 0; +} + +static void alpha_pll_lucid_evo_disable(struct clk_hw *hw) +{ + _alpha_pll_lucid_evo_disable(hw, false); +} + +static int alpha_pll_lucid_evo_prepare(struct clk_hw *hw) +{ + return _alpha_pll_lucid_evo_prepare(hw, false); +} + +static void alpha_pll_reset_lucid_evo_disable(struct clk_hw *hw) +{ + _alpha_pll_lucid_evo_disable(hw, true); +} + +static int alpha_pll_reset_lucid_evo_prepare(struct clk_hw *hw) +{ + return _alpha_pll_lucid_evo_prepare(hw, true); +} + +static unsigned long alpha_pll_lucid_evo_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 l, frac; + + regmap_read(regmap, PLL_L_VAL(pll), &l); + l &= LUCID_EVO_PLL_L_VAL_MASK; + regmap_read(regmap, PLL_ALPHA_VAL(pll), &frac); + + return alpha_pll_calc_rate(parent_rate, l, frac, pll_alpha_width(pll)); +} + +static int clk_lucid_evo_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + return __clk_lucid_pll_postdiv_set_rate(hw, rate, parent_rate, LUCID_EVO_ENABLE_VOTE_RUN); +} + +const struct clk_ops clk_alpha_pll_fixed_lucid_evo_ops = { + .enable = alpha_pll_lucid_evo_enable, + .disable = alpha_pll_lucid_evo_disable, + .is_enabled = clk_trion_pll_is_enabled, + .recalc_rate = alpha_pll_lucid_evo_recalc_rate, + .round_rate = clk_alpha_pll_round_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_fixed_lucid_evo_ops); + +const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops = { + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, + .set_rate = clk_lucid_evo_pll_postdiv_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_lucid_evo_ops); + +const struct clk_ops clk_alpha_pll_lucid_evo_ops = { + .prepare = alpha_pll_lucid_evo_prepare, + .enable = alpha_pll_lucid_evo_enable, + .disable = alpha_pll_lucid_evo_disable, + .is_enabled = clk_trion_pll_is_enabled, + .recalc_rate = alpha_pll_lucid_evo_recalc_rate, + .round_rate = clk_alpha_pll_round_rate, + .set_rate = alpha_pll_lucid_5lpe_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_lucid_evo_ops); + +const struct clk_ops clk_alpha_pll_reset_lucid_evo_ops = { + .prepare = alpha_pll_reset_lucid_evo_prepare, + .enable = alpha_pll_lucid_evo_enable, + .disable = alpha_pll_reset_lucid_evo_disable, + .is_enabled = clk_trion_pll_is_enabled, + .recalc_rate = alpha_pll_lucid_evo_recalc_rate, + .round_rate = clk_alpha_pll_round_rate, + .set_rate = alpha_pll_lucid_5lpe_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_reset_lucid_evo_ops); + +void clk_rivian_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, + const struct alpha_pll_config *config) +{ + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U(pll), config->config_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U1(pll), config->config_ctl_hi1_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL(pll), config->test_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U(pll), config->test_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), config->l); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL(pll), config->user_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U(pll), config->user_ctl_hi_val); + + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); + + regmap_update_bits(regmap, PLL_MODE(pll), + PLL_RESET_N | PLL_BYPASSNL | PLL_OUTCTRL, + PLL_RESET_N | PLL_BYPASSNL); +} +EXPORT_SYMBOL_GPL(clk_rivian_evo_pll_configure); + +static unsigned long clk_rivian_evo_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + u32 l; + + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); + + return parent_rate * l; +} + +static long clk_rivian_evo_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + unsigned long min_freq, max_freq; + u32 l; + u64 a; + + rate = alpha_pll_round_rate(rate, *prate, &l, &a, 0); + if (!pll->vco_table || alpha_pll_find_vco(pll, rate)) + return rate; + + min_freq = pll->vco_table[0].min_freq; + max_freq = pll->vco_table[pll->num_vco - 1].max_freq; + + return clamp(rate, min_freq, max_freq); +} + +const struct clk_ops clk_alpha_pll_rivian_evo_ops = { + .enable = alpha_pll_lucid_5lpe_enable, + .disable = alpha_pll_lucid_5lpe_disable, + .is_enabled = clk_trion_pll_is_enabled, + .recalc_rate = clk_rivian_evo_pll_recalc_rate, + .round_rate = clk_rivian_evo_pll_round_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_rivian_evo_ops); |