diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/hwmon/aspeed-pwm-tacho.c | 972 |
1 files changed, 972 insertions, 0 deletions
diff --git a/drivers/hwmon/aspeed-pwm-tacho.c b/drivers/hwmon/aspeed-pwm-tacho.c new file mode 100644 index 000000000..d11f674e3 --- /dev/null +++ b/drivers/hwmon/aspeed-pwm-tacho.c @@ -0,0 +1,972 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2016 Google, Inc + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/gpio/consumer.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/sysfs.h> +#include <linux/thermal.h> + +/* ASPEED PWM & FAN Tach Register Definition */ +#define ASPEED_PTCR_CTRL 0x00 +#define ASPEED_PTCR_CLK_CTRL 0x04 +#define ASPEED_PTCR_DUTY0_CTRL 0x08 +#define ASPEED_PTCR_DUTY1_CTRL 0x0c +#define ASPEED_PTCR_TYPEM_CTRL 0x10 +#define ASPEED_PTCR_TYPEM_CTRL1 0x14 +#define ASPEED_PTCR_TYPEN_CTRL 0x18 +#define ASPEED_PTCR_TYPEN_CTRL1 0x1c +#define ASPEED_PTCR_TACH_SOURCE 0x20 +#define ASPEED_PTCR_TRIGGER 0x28 +#define ASPEED_PTCR_RESULT 0x2c +#define ASPEED_PTCR_INTR_CTRL 0x30 +#define ASPEED_PTCR_INTR_STS 0x34 +#define ASPEED_PTCR_TYPEM_LIMIT 0x38 +#define ASPEED_PTCR_TYPEN_LIMIT 0x3C +#define ASPEED_PTCR_CTRL_EXT 0x40 +#define ASPEED_PTCR_CLK_CTRL_EXT 0x44 +#define ASPEED_PTCR_DUTY2_CTRL 0x48 +#define ASPEED_PTCR_DUTY3_CTRL 0x4c +#define ASPEED_PTCR_TYPEO_CTRL 0x50 +#define ASPEED_PTCR_TYPEO_CTRL1 0x54 +#define ASPEED_PTCR_TACH_SOURCE_EXT 0x60 +#define ASPEED_PTCR_TYPEO_LIMIT 0x78 + +/* ASPEED_PTCR_CTRL : 0x00 - General Control Register */ +#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1 15 +#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2 6 +#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK (BIT(7) | BIT(15)) + +#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1 14 +#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2 5 +#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK (BIT(6) | BIT(14)) + +#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1 13 +#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2 4 +#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK (BIT(5) | BIT(13)) + +#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1 12 +#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2 3 +#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK (BIT(4) | BIT(12)) + +#define ASPEED_PTCR_CTRL_FAN_NUM_EN(x) BIT(16 + (x)) + +#define ASPEED_PTCR_CTRL_PWMD_EN BIT(11) +#define ASPEED_PTCR_CTRL_PWMC_EN BIT(10) +#define ASPEED_PTCR_CTRL_PWMB_EN BIT(9) +#define ASPEED_PTCR_CTRL_PWMA_EN BIT(8) + +#define ASPEED_PTCR_CTRL_CLK_SRC BIT(1) +#define ASPEED_PTCR_CTRL_CLK_EN BIT(0) + +/* ASPEED_PTCR_CLK_CTRL : 0x04 - Clock Control Register */ +/* TYPE N */ +#define ASPEED_PTCR_CLK_CTRL_TYPEN_MASK GENMASK(31, 16) +#define ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT 24 +#define ASPEED_PTCR_CLK_CTRL_TYPEN_H 20 +#define ASPEED_PTCR_CLK_CTRL_TYPEN_L 16 +/* TYPE M */ +#define ASPEED_PTCR_CLK_CTRL_TYPEM_MASK GENMASK(15, 0) +#define ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT 8 +#define ASPEED_PTCR_CLK_CTRL_TYPEM_H 4 +#define ASPEED_PTCR_CLK_CTRL_TYPEM_L 0 + +/* + * ASPEED_PTCR_DUTY_CTRL/1/2/3 : 0x08/0x0C/0x48/0x4C - PWM-FAN duty control + * 0/1/2/3 register + */ +#define DUTY_CTRL_PWM2_FALL_POINT 24 +#define DUTY_CTRL_PWM2_RISE_POINT 16 +#define DUTY_CTRL_PWM2_RISE_FALL_MASK GENMASK(31, 16) +#define DUTY_CTRL_PWM1_FALL_POINT 8 +#define DUTY_CTRL_PWM1_RISE_POINT 0 +#define DUTY_CTRL_PWM1_RISE_FALL_MASK GENMASK(15, 0) + +/* ASPEED_PTCR_TYPEM_CTRL : 0x10/0x18/0x50 - Type M/N/O Ctrl 0 Register */ +#define TYPE_CTRL_FAN_MASK (GENMASK(5, 1) | GENMASK(31, 16)) +#define TYPE_CTRL_FAN1_MASK GENMASK(31, 0) +#define TYPE_CTRL_FAN_PERIOD 16 +#define TYPE_CTRL_FAN_MODE 4 +#define TYPE_CTRL_FAN_DIVISION 1 +#define TYPE_CTRL_FAN_TYPE_EN 1 + +/* ASPEED_PTCR_TACH_SOURCE : 0x20/0x60 - Tach Source Register */ +/* bit [0,1] at 0x20, bit [2] at 0x60 */ +#define TACH_PWM_SOURCE_BIT01(x) ((x) * 2) +#define TACH_PWM_SOURCE_BIT2(x) ((x) * 2) +#define TACH_PWM_SOURCE_MASK_BIT01(x) (0x3 << ((x) * 2)) +#define TACH_PWM_SOURCE_MASK_BIT2(x) BIT((x) * 2) + +/* ASPEED_PTCR_RESULT : 0x2c - Result Register */ +#define RESULT_STATUS_MASK BIT(31) +#define RESULT_VALUE_MASK 0xfffff + +/* ASPEED_PTCR_CTRL_EXT : 0x40 - General Control Extension #1 Register */ +#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1 15 +#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2 6 +#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK (BIT(7) | BIT(15)) + +#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1 14 +#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2 5 +#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK (BIT(6) | BIT(14)) + +#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1 13 +#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2 4 +#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK (BIT(5) | BIT(13)) + +#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1 12 +#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2 3 +#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK (BIT(4) | BIT(12)) + +#define ASPEED_PTCR_CTRL_PWMH_EN BIT(11) +#define ASPEED_PTCR_CTRL_PWMG_EN BIT(10) +#define ASPEED_PTCR_CTRL_PWMF_EN BIT(9) +#define ASPEED_PTCR_CTRL_PWME_EN BIT(8) + +/* ASPEED_PTCR_CLK_EXT_CTRL : 0x44 - Clock Control Extension #1 Register */ +/* TYPE O */ +#define ASPEED_PTCR_CLK_CTRL_TYPEO_MASK GENMASK(15, 0) +#define ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT 8 +#define ASPEED_PTCR_CLK_CTRL_TYPEO_H 4 +#define ASPEED_PTCR_CLK_CTRL_TYPEO_L 0 + +#define PWM_MAX 255 + +#define BOTH_EDGES 0x02 /* 10b */ + +#define M_PWM_DIV_H 0x00 +#define M_PWM_DIV_L 0x05 +#define M_PWM_PERIOD 0x5F +#define M_TACH_CLK_DIV 0x00 +/* + * 5:4 Type N fan tach mode selection bit: + * 00: falling + * 01: rising + * 10: both + * 11: reserved. + */ +#define M_TACH_MODE 0x02 /* 10b */ +#define M_TACH_UNIT 0x0420 +#define INIT_FAN_CTRL 0xFF + +/* How long we sleep in us while waiting for an RPM result. */ +#define ASPEED_RPM_STATUS_SLEEP_USEC 500 + +#define MAX_CDEV_NAME_LEN 16 + +struct aspeed_cooling_device { + char name[16]; + struct aspeed_pwm_tacho_data *priv; + struct thermal_cooling_device *tcdev; + int pwm_port; + u8 *cooling_levels; + u8 max_state; + u8 cur_state; +}; + +struct aspeed_pwm_tacho_data { + struct regmap *regmap; + struct reset_control *rst; + unsigned long clk_freq; + bool pwm_present[8]; + bool fan_tach_present[16]; + u8 type_pwm_clock_unit[3]; + u8 type_pwm_clock_division_h[3]; + u8 type_pwm_clock_division_l[3]; + u8 type_fan_tach_clock_division[3]; + u8 type_fan_tach_mode[3]; + u16 type_fan_tach_unit[3]; + u8 pwm_port_type[8]; + u8 pwm_port_fan_ctrl[8]; + u8 fan_tach_ch_source[16]; + struct aspeed_cooling_device *cdev[8]; + const struct attribute_group *groups[3]; +}; + +enum type { TYPEM, TYPEN, TYPEO }; + +struct type_params { + u32 l_value; + u32 h_value; + u32 unit_value; + u32 clk_ctrl_mask; + u32 clk_ctrl_reg; + u32 ctrl_reg; + u32 ctrl_reg1; +}; + +static const struct type_params type_params[] = { + [TYPEM] = { + .l_value = ASPEED_PTCR_CLK_CTRL_TYPEM_L, + .h_value = ASPEED_PTCR_CLK_CTRL_TYPEM_H, + .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT, + .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEM_MASK, + .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL, + .ctrl_reg = ASPEED_PTCR_TYPEM_CTRL, + .ctrl_reg1 = ASPEED_PTCR_TYPEM_CTRL1, + }, + [TYPEN] = { + .l_value = ASPEED_PTCR_CLK_CTRL_TYPEN_L, + .h_value = ASPEED_PTCR_CLK_CTRL_TYPEN_H, + .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT, + .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEN_MASK, + .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL, + .ctrl_reg = ASPEED_PTCR_TYPEN_CTRL, + .ctrl_reg1 = ASPEED_PTCR_TYPEN_CTRL1, + }, + [TYPEO] = { + .l_value = ASPEED_PTCR_CLK_CTRL_TYPEO_L, + .h_value = ASPEED_PTCR_CLK_CTRL_TYPEO_H, + .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT, + .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEO_MASK, + .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL_EXT, + .ctrl_reg = ASPEED_PTCR_TYPEO_CTRL, + .ctrl_reg1 = ASPEED_PTCR_TYPEO_CTRL1, + } +}; + +enum pwm_port { PWMA, PWMB, PWMC, PWMD, PWME, PWMF, PWMG, PWMH }; + +struct pwm_port_params { + u32 pwm_en; + u32 ctrl_reg; + u32 type_part1; + u32 type_part2; + u32 type_mask; + u32 duty_ctrl_rise_point; + u32 duty_ctrl_fall_point; + u32 duty_ctrl_reg; + u32 duty_ctrl_rise_fall_mask; +}; + +static const struct pwm_port_params pwm_port_params[] = { + [PWMA] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMA_EN, + .ctrl_reg = ASPEED_PTCR_CTRL, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, + }, + [PWMB] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMB_EN, + .ctrl_reg = ASPEED_PTCR_CTRL, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, + }, + [PWMC] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMC_EN, + .ctrl_reg = ASPEED_PTCR_CTRL, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, + }, + [PWMD] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMD_EN, + .ctrl_reg = ASPEED_PTCR_CTRL, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, + }, + [PWME] = { + .pwm_en = ASPEED_PTCR_CTRL_PWME_EN, + .ctrl_reg = ASPEED_PTCR_CTRL_EXT, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, + }, + [PWMF] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMF_EN, + .ctrl_reg = ASPEED_PTCR_CTRL_EXT, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, + }, + [PWMG] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMG_EN, + .ctrl_reg = ASPEED_PTCR_CTRL_EXT, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, + }, + [PWMH] = { + .pwm_en = ASPEED_PTCR_CTRL_PWMH_EN, + .ctrl_reg = ASPEED_PTCR_CTRL_EXT, + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1, + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2, + .type_mask = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK, + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, + .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL, + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, + } +}; + +static int regmap_aspeed_pwm_tacho_reg_write(void *context, unsigned int reg, + unsigned int val) +{ + void __iomem *regs = (void __iomem *)context; + + writel(val, regs + reg); + return 0; +} + +static int regmap_aspeed_pwm_tacho_reg_read(void *context, unsigned int reg, + unsigned int *val) +{ + void __iomem *regs = (void __iomem *)context; + + *val = readl(regs + reg); + return 0; +} + +static const struct regmap_config aspeed_pwm_tacho_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = ASPEED_PTCR_TYPEO_LIMIT, + .reg_write = regmap_aspeed_pwm_tacho_reg_write, + .reg_read = regmap_aspeed_pwm_tacho_reg_read, + .fast_io = true, +}; + +static void aspeed_set_clock_enable(struct regmap *regmap, bool val) +{ + regmap_update_bits(regmap, ASPEED_PTCR_CTRL, + ASPEED_PTCR_CTRL_CLK_EN, + val ? ASPEED_PTCR_CTRL_CLK_EN : 0); +} + +static void aspeed_set_clock_source(struct regmap *regmap, int val) +{ + regmap_update_bits(regmap, ASPEED_PTCR_CTRL, + ASPEED_PTCR_CTRL_CLK_SRC, + val ? ASPEED_PTCR_CTRL_CLK_SRC : 0); +} + +static void aspeed_set_pwm_clock_values(struct regmap *regmap, u8 type, + u8 div_high, u8 div_low, u8 unit) +{ + u32 reg_value = ((div_high << type_params[type].h_value) | + (div_low << type_params[type].l_value) | + (unit << type_params[type].unit_value)); + + regmap_update_bits(regmap, type_params[type].clk_ctrl_reg, + type_params[type].clk_ctrl_mask, reg_value); +} + +static void aspeed_set_pwm_port_enable(struct regmap *regmap, u8 pwm_port, + bool enable) +{ + regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg, + pwm_port_params[pwm_port].pwm_en, + enable ? pwm_port_params[pwm_port].pwm_en : 0); +} + +static void aspeed_set_pwm_port_type(struct regmap *regmap, + u8 pwm_port, u8 type) +{ + u32 reg_value = (type & 0x1) << pwm_port_params[pwm_port].type_part1; + + reg_value |= (type & 0x2) << pwm_port_params[pwm_port].type_part2; + + regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg, + pwm_port_params[pwm_port].type_mask, reg_value); +} + +static void aspeed_set_pwm_port_duty_rising_falling(struct regmap *regmap, + u8 pwm_port, u8 rising, + u8 falling) +{ + u32 reg_value = (rising << + pwm_port_params[pwm_port].duty_ctrl_rise_point); + reg_value |= (falling << + pwm_port_params[pwm_port].duty_ctrl_fall_point); + + regmap_update_bits(regmap, pwm_port_params[pwm_port].duty_ctrl_reg, + pwm_port_params[pwm_port].duty_ctrl_rise_fall_mask, + reg_value); +} + +static void aspeed_set_tacho_type_enable(struct regmap *regmap, u8 type, + bool enable) +{ + regmap_update_bits(regmap, type_params[type].ctrl_reg, + TYPE_CTRL_FAN_TYPE_EN, + enable ? TYPE_CTRL_FAN_TYPE_EN : 0); +} + +static void aspeed_set_tacho_type_values(struct regmap *regmap, u8 type, + u8 mode, u16 unit, u8 division) +{ + u32 reg_value = ((mode << TYPE_CTRL_FAN_MODE) | + (unit << TYPE_CTRL_FAN_PERIOD) | + (division << TYPE_CTRL_FAN_DIVISION)); + + regmap_update_bits(regmap, type_params[type].ctrl_reg, + TYPE_CTRL_FAN_MASK, reg_value); + regmap_update_bits(regmap, type_params[type].ctrl_reg1, + TYPE_CTRL_FAN1_MASK, unit << 16); +} + +static void aspeed_set_fan_tach_ch_enable(struct regmap *regmap, u8 fan_tach_ch, + bool enable) +{ + regmap_update_bits(regmap, ASPEED_PTCR_CTRL, + ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch), + enable ? + ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch) : 0); +} + +static void aspeed_set_fan_tach_ch_source(struct regmap *regmap, u8 fan_tach_ch, + u8 fan_tach_ch_source) +{ + u32 reg_value1 = ((fan_tach_ch_source & 0x3) << + TACH_PWM_SOURCE_BIT01(fan_tach_ch)); + u32 reg_value2 = (((fan_tach_ch_source & 0x4) >> 2) << + TACH_PWM_SOURCE_BIT2(fan_tach_ch)); + + regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE, + TACH_PWM_SOURCE_MASK_BIT01(fan_tach_ch), + reg_value1); + + regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE_EXT, + TACH_PWM_SOURCE_MASK_BIT2(fan_tach_ch), + reg_value2); +} + +static void aspeed_set_pwm_port_fan_ctrl(struct aspeed_pwm_tacho_data *priv, + u8 index, u8 fan_ctrl) +{ + u16 period, dc_time_on; + + period = priv->type_pwm_clock_unit[priv->pwm_port_type[index]]; + period += 1; + dc_time_on = (fan_ctrl * period) / PWM_MAX; + + if (dc_time_on == 0) { + aspeed_set_pwm_port_enable(priv->regmap, index, false); + } else { + if (dc_time_on == period) + dc_time_on = 0; + + aspeed_set_pwm_port_duty_rising_falling(priv->regmap, index, 0, + dc_time_on); + aspeed_set_pwm_port_enable(priv->regmap, index, true); + } +} + +static u32 aspeed_get_fan_tach_ch_measure_period(struct aspeed_pwm_tacho_data + *priv, u8 type) +{ + u32 clk; + u16 tacho_unit; + u8 clk_unit, div_h, div_l, tacho_div; + + clk = priv->clk_freq; + clk_unit = priv->type_pwm_clock_unit[type]; + div_h = priv->type_pwm_clock_division_h[type]; + div_h = 0x1 << div_h; + div_l = priv->type_pwm_clock_division_l[type]; + if (div_l == 0) + div_l = 1; + else + div_l = div_l * 2; + + tacho_unit = priv->type_fan_tach_unit[type]; + tacho_div = priv->type_fan_tach_clock_division[type]; + + tacho_div = 0x4 << (tacho_div * 2); + return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit); +} + +static int aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv, + u8 fan_tach_ch) +{ + u32 raw_data, tach_div, clk_source, msec, usec, val; + u8 fan_tach_ch_source, type, mode, both; + int ret; + + regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0); + regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch); + + fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch]; + type = priv->pwm_port_type[fan_tach_ch_source]; + + msec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type)); + usec = msec * 1000; + + ret = regmap_read_poll_timeout( + priv->regmap, + ASPEED_PTCR_RESULT, + val, + (val & RESULT_STATUS_MASK), + ASPEED_RPM_STATUS_SLEEP_USEC, + usec); + + /* return -ETIMEDOUT if we didn't get an answer. */ + if (ret) + return ret; + + raw_data = val & RESULT_VALUE_MASK; + tach_div = priv->type_fan_tach_clock_division[type]; + /* + * We need the mode to determine if the raw_data is double (from + * counting both edges). + */ + mode = priv->type_fan_tach_mode[type]; + both = (mode & BOTH_EDGES) ? 1 : 0; + + tach_div = (0x4 << both) << (tach_div * 2); + clk_source = priv->clk_freq; + + if (raw_data == 0) + return 0; + + return (clk_source * 60) / (2 * raw_data * tach_div); +} + +static ssize_t pwm_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + int ret; + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); + long fan_ctrl; + + ret = kstrtol(buf, 10, &fan_ctrl); + if (ret != 0) + return ret; + + if (fan_ctrl < 0 || fan_ctrl > PWM_MAX) + return -EINVAL; + + if (priv->pwm_port_fan_ctrl[index] == fan_ctrl) + return count; + + priv->pwm_port_fan_ctrl[index] = fan_ctrl; + aspeed_set_pwm_port_fan_ctrl(priv, index, fan_ctrl); + + return count; +} + +static ssize_t pwm_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", priv->pwm_port_fan_ctrl[index]); +} + +static ssize_t rpm_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int index = sensor_attr->index; + int rpm; + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); + + rpm = aspeed_get_fan_tach_ch_rpm(priv, index); + if (rpm < 0) + return rpm; + + return sprintf(buf, "%d\n", rpm); +} + +static umode_t pwm_is_visible(struct kobject *kobj, + struct attribute *a, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); + + if (!priv->pwm_present[index]) + return 0; + return a->mode; +} + +static umode_t fan_dev_is_visible(struct kobject *kobj, + struct attribute *a, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); + + if (!priv->fan_tach_present[index]) + return 0; + return a->mode; +} + +static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); +static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); +static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2); +static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3); +static SENSOR_DEVICE_ATTR_RW(pwm5, pwm, 4); +static SENSOR_DEVICE_ATTR_RW(pwm6, pwm, 5); +static SENSOR_DEVICE_ATTR_RW(pwm7, pwm, 6); +static SENSOR_DEVICE_ATTR_RW(pwm8, pwm, 7); +static struct attribute *pwm_dev_attrs[] = { + &sensor_dev_attr_pwm1.dev_attr.attr, + &sensor_dev_attr_pwm2.dev_attr.attr, + &sensor_dev_attr_pwm3.dev_attr.attr, + &sensor_dev_attr_pwm4.dev_attr.attr, + &sensor_dev_attr_pwm5.dev_attr.attr, + &sensor_dev_attr_pwm6.dev_attr.attr, + &sensor_dev_attr_pwm7.dev_attr.attr, + &sensor_dev_attr_pwm8.dev_attr.attr, + NULL, +}; + +static const struct attribute_group pwm_dev_group = { + .attrs = pwm_dev_attrs, + .is_visible = pwm_is_visible, +}; + +static SENSOR_DEVICE_ATTR_RO(fan1_input, rpm, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, rpm, 1); +static SENSOR_DEVICE_ATTR_RO(fan3_input, rpm, 2); +static SENSOR_DEVICE_ATTR_RO(fan4_input, rpm, 3); +static SENSOR_DEVICE_ATTR_RO(fan5_input, rpm, 4); +static SENSOR_DEVICE_ATTR_RO(fan6_input, rpm, 5); +static SENSOR_DEVICE_ATTR_RO(fan7_input, rpm, 6); +static SENSOR_DEVICE_ATTR_RO(fan8_input, rpm, 7); +static SENSOR_DEVICE_ATTR_RO(fan9_input, rpm, 8); +static SENSOR_DEVICE_ATTR_RO(fan10_input, rpm, 9); +static SENSOR_DEVICE_ATTR_RO(fan11_input, rpm, 10); +static SENSOR_DEVICE_ATTR_RO(fan12_input, rpm, 11); +static SENSOR_DEVICE_ATTR_RO(fan13_input, rpm, 12); +static SENSOR_DEVICE_ATTR_RO(fan14_input, rpm, 13); +static SENSOR_DEVICE_ATTR_RO(fan15_input, rpm, 14); +static SENSOR_DEVICE_ATTR_RO(fan16_input, rpm, 15); +static struct attribute *fan_dev_attrs[] = { + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan3_input.dev_attr.attr, + &sensor_dev_attr_fan4_input.dev_attr.attr, + &sensor_dev_attr_fan5_input.dev_attr.attr, + &sensor_dev_attr_fan6_input.dev_attr.attr, + &sensor_dev_attr_fan7_input.dev_attr.attr, + &sensor_dev_attr_fan8_input.dev_attr.attr, + &sensor_dev_attr_fan9_input.dev_attr.attr, + &sensor_dev_attr_fan10_input.dev_attr.attr, + &sensor_dev_attr_fan11_input.dev_attr.attr, + &sensor_dev_attr_fan12_input.dev_attr.attr, + &sensor_dev_attr_fan13_input.dev_attr.attr, + &sensor_dev_attr_fan14_input.dev_attr.attr, + &sensor_dev_attr_fan15_input.dev_attr.attr, + &sensor_dev_attr_fan16_input.dev_attr.attr, + NULL +}; + +static const struct attribute_group fan_dev_group = { + .attrs = fan_dev_attrs, + .is_visible = fan_dev_is_visible, +}; + +/* + * The clock type is type M : + * The PWM frequency = 24MHz / (type M clock division L bit * + * type M clock division H bit * (type M PWM period bit + 1)) + */ +static void aspeed_create_type(struct aspeed_pwm_tacho_data *priv) +{ + priv->type_pwm_clock_division_h[TYPEM] = M_PWM_DIV_H; + priv->type_pwm_clock_division_l[TYPEM] = M_PWM_DIV_L; + priv->type_pwm_clock_unit[TYPEM] = M_PWM_PERIOD; + aspeed_set_pwm_clock_values(priv->regmap, TYPEM, M_PWM_DIV_H, + M_PWM_DIV_L, M_PWM_PERIOD); + aspeed_set_tacho_type_enable(priv->regmap, TYPEM, true); + priv->type_fan_tach_clock_division[TYPEM] = M_TACH_CLK_DIV; + priv->type_fan_tach_unit[TYPEM] = M_TACH_UNIT; + priv->type_fan_tach_mode[TYPEM] = M_TACH_MODE; + aspeed_set_tacho_type_values(priv->regmap, TYPEM, M_TACH_MODE, + M_TACH_UNIT, M_TACH_CLK_DIV); +} + +static void aspeed_create_pwm_port(struct aspeed_pwm_tacho_data *priv, + u8 pwm_port) +{ + aspeed_set_pwm_port_enable(priv->regmap, pwm_port, true); + priv->pwm_present[pwm_port] = true; + + priv->pwm_port_type[pwm_port] = TYPEM; + aspeed_set_pwm_port_type(priv->regmap, pwm_port, TYPEM); + + priv->pwm_port_fan_ctrl[pwm_port] = INIT_FAN_CTRL; + aspeed_set_pwm_port_fan_ctrl(priv, pwm_port, INIT_FAN_CTRL); +} + +static void aspeed_create_fan_tach_channel(struct aspeed_pwm_tacho_data *priv, + u8 *fan_tach_ch, + int count, + u8 pwm_source) +{ + u8 val, index; + + for (val = 0; val < count; val++) { + index = fan_tach_ch[val]; + aspeed_set_fan_tach_ch_enable(priv->regmap, index, true); + priv->fan_tach_present[index] = true; + priv->fan_tach_ch_source[index] = pwm_source; + aspeed_set_fan_tach_ch_source(priv->regmap, index, pwm_source); + } +} + +static int +aspeed_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev, + unsigned long *state) +{ + struct aspeed_cooling_device *cdev = tcdev->devdata; + + *state = cdev->max_state; + + return 0; +} + +static int +aspeed_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev, + unsigned long *state) +{ + struct aspeed_cooling_device *cdev = tcdev->devdata; + + *state = cdev->cur_state; + + return 0; +} + +static int +aspeed_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev, + unsigned long state) +{ + struct aspeed_cooling_device *cdev = tcdev->devdata; + + if (state > cdev->max_state) + return -EINVAL; + + cdev->cur_state = state; + cdev->priv->pwm_port_fan_ctrl[cdev->pwm_port] = + cdev->cooling_levels[cdev->cur_state]; + aspeed_set_pwm_port_fan_ctrl(cdev->priv, cdev->pwm_port, + cdev->cooling_levels[cdev->cur_state]); + + return 0; +} + +static const struct thermal_cooling_device_ops aspeed_pwm_cool_ops = { + .get_max_state = aspeed_pwm_cz_get_max_state, + .get_cur_state = aspeed_pwm_cz_get_cur_state, + .set_cur_state = aspeed_pwm_cz_set_cur_state, +}; + +static int aspeed_create_pwm_cooling(struct device *dev, + struct device_node *child, + struct aspeed_pwm_tacho_data *priv, + u32 pwm_port, u8 num_levels) +{ + int ret; + struct aspeed_cooling_device *cdev; + + cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL); + + if (!cdev) + return -ENOMEM; + + cdev->cooling_levels = devm_kzalloc(dev, num_levels, GFP_KERNEL); + if (!cdev->cooling_levels) + return -ENOMEM; + + cdev->max_state = num_levels - 1; + ret = of_property_read_u8_array(child, "cooling-levels", + cdev->cooling_levels, + num_levels); + if (ret) { + dev_err(dev, "Property 'cooling-levels' cannot be read.\n"); + return ret; + } + snprintf(cdev->name, MAX_CDEV_NAME_LEN, "%pOFn%d", child, pwm_port); + + cdev->tcdev = devm_thermal_of_cooling_device_register(dev, child, + cdev->name, cdev, &aspeed_pwm_cool_ops); + if (IS_ERR(cdev->tcdev)) + return PTR_ERR(cdev->tcdev); + + cdev->priv = priv; + cdev->pwm_port = pwm_port; + + priv->cdev[pwm_port] = cdev; + + return 0; +} + +static int aspeed_create_fan(struct device *dev, + struct device_node *child, + struct aspeed_pwm_tacho_data *priv) +{ + u8 *fan_tach_ch; + u32 pwm_port; + int ret, count; + + ret = of_property_read_u32(child, "reg", &pwm_port); + if (ret) + return ret; + if (pwm_port >= ARRAY_SIZE(pwm_port_params)) + return -EINVAL; + aspeed_create_pwm_port(priv, (u8)pwm_port); + + ret = of_property_count_u8_elems(child, "cooling-levels"); + + if (ret > 0) { + ret = aspeed_create_pwm_cooling(dev, child, priv, pwm_port, + ret); + if (ret) + return ret; + } + + count = of_property_count_u8_elems(child, "aspeed,fan-tach-ch"); + if (count < 1) + return -EINVAL; + fan_tach_ch = devm_kcalloc(dev, count, sizeof(*fan_tach_ch), + GFP_KERNEL); + if (!fan_tach_ch) + return -ENOMEM; + ret = of_property_read_u8_array(child, "aspeed,fan-tach-ch", + fan_tach_ch, count); + if (ret) + return ret; + aspeed_create_fan_tach_channel(priv, fan_tach_ch, count, pwm_port); + + return 0; +} + +static void aspeed_pwm_tacho_remove(void *data) +{ + struct aspeed_pwm_tacho_data *priv = data; + + reset_control_assert(priv->rst); +} + +static int aspeed_pwm_tacho_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np, *child; + struct aspeed_pwm_tacho_data *priv; + void __iomem *regs; + struct device *hwmon; + struct clk *clk; + int ret; + + np = dev->of_node; + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + priv->regmap = devm_regmap_init(dev, NULL, (__force void *)regs, + &aspeed_pwm_tacho_regmap_config); + if (IS_ERR(priv->regmap)) + return PTR_ERR(priv->regmap); + + priv->rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(priv->rst)) { + dev_err(dev, + "missing or invalid reset controller device tree entry"); + return PTR_ERR(priv->rst); + } + reset_control_deassert(priv->rst); + + ret = devm_add_action_or_reset(dev, aspeed_pwm_tacho_remove, priv); + if (ret) + return ret; + + regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE, 0); + regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE_EXT, 0); + + clk = devm_clk_get(dev, NULL); + if (IS_ERR(clk)) + return -ENODEV; + priv->clk_freq = clk_get_rate(clk); + aspeed_set_clock_enable(priv->regmap, true); + aspeed_set_clock_source(priv->regmap, 0); + + aspeed_create_type(priv); + + for_each_child_of_node(np, child) { + ret = aspeed_create_fan(dev, child, priv); + if (ret) { + of_node_put(child); + return ret; + } + } + + priv->groups[0] = &pwm_dev_group; + priv->groups[1] = &fan_dev_group; + priv->groups[2] = NULL; + hwmon = devm_hwmon_device_register_with_groups(dev, + "aspeed_pwm_tacho", + priv, priv->groups); + return PTR_ERR_OR_ZERO(hwmon); +} + +static const struct of_device_id of_pwm_tacho_match_table[] = { + { .compatible = "aspeed,ast2400-pwm-tacho", }, + { .compatible = "aspeed,ast2500-pwm-tacho", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_pwm_tacho_match_table); + +static struct platform_driver aspeed_pwm_tacho_driver = { + .probe = aspeed_pwm_tacho_probe, + .driver = { + .name = "aspeed_pwm_tacho", + .of_match_table = of_pwm_tacho_match_table, + }, +}; + +module_platform_driver(aspeed_pwm_tacho_driver); + +MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>"); +MODULE_DESCRIPTION("ASPEED PWM and Fan Tacho device driver"); +MODULE_LICENSE("GPL"); |