diff options
Diffstat (limited to 'drivers/dpll/zl3073x/core.h')
| -rw-r--r-- | drivers/dpll/zl3073x/core.h | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/drivers/dpll/zl3073x/core.h b/drivers/dpll/zl3073x/core.h new file mode 100644 index 000000000000..71af2c800110 --- /dev/null +++ b/drivers/dpll/zl3073x/core.h @@ -0,0 +1,383 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef _ZL3073X_CORE_H +#define _ZL3073X_CORE_H + +#include <linux/kthread.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/types.h> + +#include "regs.h" + +struct device; +struct regmap; +struct zl3073x_dpll; + +/* + * Hardware limits for ZL3073x chip family + */ +#define ZL3073X_MAX_CHANNELS 5 +#define ZL3073X_NUM_REFS 10 +#define ZL3073X_NUM_OUTS 10 +#define ZL3073X_NUM_SYNTHS 5 +#define ZL3073X_NUM_INPUT_PINS ZL3073X_NUM_REFS +#define ZL3073X_NUM_OUTPUT_PINS (ZL3073X_NUM_OUTS * 2) +#define ZL3073X_NUM_PINS (ZL3073X_NUM_INPUT_PINS + \ + ZL3073X_NUM_OUTPUT_PINS) + +/** + * struct zl3073x_ref - input reference invariant info + * @enabled: input reference is enabled or disabled + * @diff: true if input reference is differential + * @ffo: current fractional frequency offset + */ +struct zl3073x_ref { + bool enabled; + bool diff; + s64 ffo; +}; + +/** + * struct zl3073x_out - output invariant info + * @enabled: out is enabled or disabled + * @synth: synthesizer the out is connected to + * @signal_format: out signal format + */ +struct zl3073x_out { + bool enabled; + u8 synth; + u8 signal_format; +}; + +/** + * struct zl3073x_synth - synthesizer invariant info + * @freq: synthesizer frequency + * @dpll: ID of DPLL the synthesizer is driven by + * @enabled: synth is enabled or disabled + */ +struct zl3073x_synth { + u32 freq; + u8 dpll; + bool enabled; +}; + +/** + * struct zl3073x_dev - zl3073x device + * @dev: pointer to device + * @regmap: regmap to access device registers + * @multiop_lock: to serialize multiple register operations + * @clock_id: clock id of the device + * @ref: array of input references' invariants + * @out: array of outs' invariants + * @synth: array of synths' invariants + * @dplls: list of DPLLs + * @kworker: thread for periodic work + * @work: periodic work + */ +struct zl3073x_dev { + struct device *dev; + struct regmap *regmap; + struct mutex multiop_lock; + u64 clock_id; + + /* Invariants */ + struct zl3073x_ref ref[ZL3073X_NUM_REFS]; + struct zl3073x_out out[ZL3073X_NUM_OUTS]; + struct zl3073x_synth synth[ZL3073X_NUM_SYNTHS]; + + /* DPLL channels */ + struct list_head dplls; + + /* Monitor */ + struct kthread_worker *kworker; + struct kthread_delayed_work work; +}; + +struct zl3073x_chip_info { + const u16 *ids; + size_t num_ids; + int num_channels; +}; + +extern const struct zl3073x_chip_info zl30731_chip_info; +extern const struct zl3073x_chip_info zl30732_chip_info; +extern const struct zl3073x_chip_info zl30733_chip_info; +extern const struct zl3073x_chip_info zl30734_chip_info; +extern const struct zl3073x_chip_info zl30735_chip_info; +extern const struct regmap_config zl3073x_regmap_config; + +struct zl3073x_dev *zl3073x_devm_alloc(struct device *dev); +int zl3073x_dev_probe(struct zl3073x_dev *zldev, + const struct zl3073x_chip_info *chip_info); + +/********************** + * Registers operations + **********************/ + +int zl3073x_mb_op(struct zl3073x_dev *zldev, unsigned int op_reg, u8 op_val, + unsigned int mask_reg, u16 mask_val); +int zl3073x_poll_zero_u8(struct zl3073x_dev *zldev, unsigned int reg, u8 mask); +int zl3073x_read_u8(struct zl3073x_dev *zldev, unsigned int reg, u8 *val); +int zl3073x_read_u16(struct zl3073x_dev *zldev, unsigned int reg, u16 *val); +int zl3073x_read_u32(struct zl3073x_dev *zldev, unsigned int reg, u32 *val); +int zl3073x_read_u48(struct zl3073x_dev *zldev, unsigned int reg, u64 *val); +int zl3073x_write_u8(struct zl3073x_dev *zldev, unsigned int reg, u8 val); +int zl3073x_write_u16(struct zl3073x_dev *zldev, unsigned int reg, u16 val); +int zl3073x_write_u32(struct zl3073x_dev *zldev, unsigned int reg, u32 val); +int zl3073x_write_u48(struct zl3073x_dev *zldev, unsigned int reg, u64 val); + +/***************** + * Misc operations + *****************/ + +int zl3073x_ref_freq_factorize(u32 freq, u16 *base, u16 *mult); +int zl3073x_ref_phase_offsets_update(struct zl3073x_dev *zldev, int channel); + +static inline bool +zl3073x_is_n_pin(u8 id) +{ + /* P-pins ids are even while N-pins are odd */ + return id & 1; +} + +static inline bool +zl3073x_is_p_pin(u8 id) +{ + return !zl3073x_is_n_pin(id); +} + +/** + * zl3073x_input_pin_ref_get - get reference for given input pin + * @id: input pin id + * + * Return: reference id for the given input pin + */ +static inline u8 +zl3073x_input_pin_ref_get(u8 id) +{ + return id; +} + +/** + * zl3073x_output_pin_out_get - get output for the given output pin + * @id: output pin id + * + * Return: output id for the given output pin + */ +static inline u8 +zl3073x_output_pin_out_get(u8 id) +{ + /* Output pin pair shares the single output */ + return id / 2; +} + +/** + * zl3073x_ref_ffo_get - get current fractional frequency offset + * @zldev: pointer to zl3073x device + * @index: input reference index + * + * Return: the latest measured fractional frequency offset + */ +static inline s64 +zl3073x_ref_ffo_get(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->ref[index].ffo; +} + +/** + * zl3073x_ref_is_diff - check if the given input reference is differential + * @zldev: pointer to zl3073x device + * @index: input reference index + * + * Return: true if reference is differential, false if reference is single-ended + */ +static inline bool +zl3073x_ref_is_diff(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->ref[index].diff; +} + +/** + * zl3073x_ref_is_enabled - check if the given input reference is enabled + * @zldev: pointer to zl3073x device + * @index: input reference index + * + * Return: true if input refernce is enabled, false otherwise + */ +static inline bool +zl3073x_ref_is_enabled(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->ref[index].enabled; +} + +/** + * zl3073x_synth_dpll_get - get DPLL ID the synth is driven by + * @zldev: pointer to zl3073x device + * @index: synth index + * + * Return: ID of DPLL the given synthetizer is driven by + */ +static inline u8 +zl3073x_synth_dpll_get(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->synth[index].dpll; +} + +/** + * zl3073x_synth_freq_get - get synth current freq + * @zldev: pointer to zl3073x device + * @index: synth index + * + * Return: frequency of given synthetizer + */ +static inline u32 +zl3073x_synth_freq_get(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->synth[index].freq; +} + +/** + * zl3073x_synth_is_enabled - check if the given synth is enabled + * @zldev: pointer to zl3073x device + * @index: synth index + * + * Return: true if synth is enabled, false otherwise + */ +static inline bool +zl3073x_synth_is_enabled(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->synth[index].enabled; +} + +/** + * zl3073x_out_synth_get - get synth connected to given output + * @zldev: pointer to zl3073x device + * @index: output index + * + * Return: index of synth connected to given output. + */ +static inline u8 +zl3073x_out_synth_get(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->out[index].synth; +} + +/** + * zl3073x_out_is_enabled - check if the given output is enabled + * @zldev: pointer to zl3073x device + * @index: output index + * + * Return: true if the output is enabled, false otherwise + */ +static inline bool +zl3073x_out_is_enabled(struct zl3073x_dev *zldev, u8 index) +{ + u8 synth; + + /* Output is enabled only if associated synth is enabled */ + synth = zl3073x_out_synth_get(zldev, index); + if (zl3073x_synth_is_enabled(zldev, synth)) + return zldev->out[index].enabled; + + return false; +} + +/** + * zl3073x_out_signal_format_get - get output signal format + * @zldev: pointer to zl3073x device + * @index: output index + * + * Return: signal format of given output + */ +static inline u8 +zl3073x_out_signal_format_get(struct zl3073x_dev *zldev, u8 index) +{ + return zldev->out[index].signal_format; +} + +/** + * zl3073x_out_dpll_get - get DPLL ID the output is driven by + * @zldev: pointer to zl3073x device + * @index: output index + * + * Return: ID of DPLL the given output is driven by + */ +static inline +u8 zl3073x_out_dpll_get(struct zl3073x_dev *zldev, u8 index) +{ + u8 synth; + + /* Get synthesizer connected to given output */ + synth = zl3073x_out_synth_get(zldev, index); + + /* Return DPLL that drives the synth */ + return zl3073x_synth_dpll_get(zldev, synth); +} + +/** + * zl3073x_out_is_diff - check if the given output is differential + * @zldev: pointer to zl3073x device + * @index: output index + * + * Return: true if output is differential, false if output is single-ended + */ +static inline bool +zl3073x_out_is_diff(struct zl3073x_dev *zldev, u8 index) +{ + switch (zl3073x_out_signal_format_get(zldev, index)) { + case ZL_OUTPUT_MODE_SIGNAL_FORMAT_LVDS: + case ZL_OUTPUT_MODE_SIGNAL_FORMAT_DIFF: + case ZL_OUTPUT_MODE_SIGNAL_FORMAT_LOWVCM: + return true; + default: + break; + } + + return false; +} + +/** + * zl3073x_output_pin_is_enabled - check if the given output pin is enabled + * @zldev: pointer to zl3073x device + * @id: output pin id + * + * Checks if the output of the given output pin is enabled and also that + * its signal format also enables the given pin. + * + * Return: true if output pin is enabled, false if output pin is disabled + */ +static inline bool +zl3073x_output_pin_is_enabled(struct zl3073x_dev *zldev, u8 id) +{ + u8 output = zl3073x_output_pin_out_get(id); + + /* Check if the whole output is enabled */ + if (!zl3073x_out_is_enabled(zldev, output)) + return false; + + /* Check signal format */ + switch (zl3073x_out_signal_format_get(zldev, output)) { + case ZL_OUTPUT_MODE_SIGNAL_FORMAT_DISABLED: + /* Both output pins are disabled by signal format */ + return false; + + case ZL_OUTPUT_MODE_SIGNAL_FORMAT_1P: + /* Output is one single ended P-pin output */ + if (zl3073x_is_n_pin(id)) + return false; + break; + case ZL_OUTPUT_MODE_SIGNAL_FORMAT_1N: + /* Output is one single ended N-pin output */ + if (zl3073x_is_p_pin(id)) + return false; + break; + default: + /* For other format both pins are enabled */ + break; + } + + return true; +} + +#endif /* _ZL3073X_CORE_H */ |