| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tomer Maimon | 4431 | 99.02% | 1 | 16.67% |
| Guenter Roeck | 39 | 0.87% | 2 | 33.33% |
| Kees Cook | 3 | 0.07% | 1 | 16.67% |
| Rob Herring | 1 | 0.02% | 1 | 16.67% |
| Kun Yi | 1 | 0.02% | 1 | 16.67% |
| Total | 4475 | 6 |
// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2014-2018 Nuvoton Technology corporation. #include <linux/clk.h> #include <linux/device.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/platform_device.h> #include <linux/spinlock.h> #include <linux/sysfs.h> #include <linux/thermal.h> /* NPCM7XX PWM registers */ #define NPCM7XX_PWM_REG_BASE(base, n) ((base) + ((n) * 0x1000L)) #define NPCM7XX_PWM_REG_PR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x00) #define NPCM7XX_PWM_REG_CSR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x04) #define NPCM7XX_PWM_REG_CR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x08) #define NPCM7XX_PWM_REG_CNRx(base, n, ch) \ (NPCM7XX_PWM_REG_BASE(base, n) + 0x0C + (12 * (ch))) #define NPCM7XX_PWM_REG_CMRx(base, n, ch) \ (NPCM7XX_PWM_REG_BASE(base, n) + 0x10 + (12 * (ch))) #define NPCM7XX_PWM_REG_PDRx(base, n, ch) \ (NPCM7XX_PWM_REG_BASE(base, n) + 0x14 + (12 * (ch))) #define NPCM7XX_PWM_REG_PIER(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x3C) #define NPCM7XX_PWM_REG_PIIR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x40) #define NPCM7XX_PWM_CTRL_CH0_MODE_BIT BIT(3) #define NPCM7XX_PWM_CTRL_CH1_MODE_BIT BIT(11) #define NPCM7XX_PWM_CTRL_CH2_MODE_BIT BIT(15) #define NPCM7XX_PWM_CTRL_CH3_MODE_BIT BIT(19) #define NPCM7XX_PWM_CTRL_CH0_INV_BIT BIT(2) #define NPCM7XX_PWM_CTRL_CH1_INV_BIT BIT(10) #define NPCM7XX_PWM_CTRL_CH2_INV_BIT BIT(14) #define NPCM7XX_PWM_CTRL_CH3_INV_BIT BIT(18) #define NPCM7XX_PWM_CTRL_CH0_EN_BIT BIT(0) #define NPCM7XX_PWM_CTRL_CH1_EN_BIT BIT(8) #define NPCM7XX_PWM_CTRL_CH2_EN_BIT BIT(12) #define NPCM7XX_PWM_CTRL_CH3_EN_BIT BIT(16) /* Define the maximum PWM channel number */ #define NPCM7XX_PWM_MAX_CHN_NUM 8 #define NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE 4 #define NPCM7XX_PWM_MAX_MODULES 2 /* Define the Counter Register, value = 100 for match 100% */ #define NPCM7XX_PWM_COUNTER_DEFAULT_NUM 255 #define NPCM7XX_PWM_CMR_DEFAULT_NUM 255 #define NPCM7XX_PWM_CMR_MAX 255 /* default all PWM channels PRESCALE2 = 1 */ #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH0 0x4 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH1 0x40 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH2 0x400 #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH3 0x4000 #define PWM_OUTPUT_FREQ_25KHZ 25000 #define PWN_CNT_DEFAULT 256 #define MIN_PRESCALE1 2 #define NPCM7XX_PWM_PRESCALE_SHIFT_CH01 8 #define NPCM7XX_PWM_PRESCALE2_DEFAULT (NPCM7XX_PWM_PRESCALE2_DEFAULT_CH0 | \ NPCM7XX_PWM_PRESCALE2_DEFAULT_CH1 | \ NPCM7XX_PWM_PRESCALE2_DEFAULT_CH2 | \ NPCM7XX_PWM_PRESCALE2_DEFAULT_CH3) #define NPCM7XX_PWM_CTRL_MODE_DEFAULT (NPCM7XX_PWM_CTRL_CH0_MODE_BIT | \ NPCM7XX_PWM_CTRL_CH1_MODE_BIT | \ NPCM7XX_PWM_CTRL_CH2_MODE_BIT | \ NPCM7XX_PWM_CTRL_CH3_MODE_BIT) /* NPCM7XX FAN Tacho registers */ #define NPCM7XX_FAN_REG_BASE(base, n) ((base) + ((n) * 0x1000L)) #define NPCM7XX_FAN_REG_TCNT1(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x00) #define NPCM7XX_FAN_REG_TCRA(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x02) #define NPCM7XX_FAN_REG_TCRB(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x04) #define NPCM7XX_FAN_REG_TCNT2(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x06) #define NPCM7XX_FAN_REG_TPRSC(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x08) #define NPCM7XX_FAN_REG_TCKC(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x0A) #define NPCM7XX_FAN_REG_TMCTRL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x0C) #define NPCM7XX_FAN_REG_TICTRL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x0E) #define NPCM7XX_FAN_REG_TICLR(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x10) #define NPCM7XX_FAN_REG_TIEN(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x12) #define NPCM7XX_FAN_REG_TCPA(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x14) #define NPCM7XX_FAN_REG_TCPB(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x16) #define NPCM7XX_FAN_REG_TCPCFG(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x18) #define NPCM7XX_FAN_REG_TINASEL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x1A) #define NPCM7XX_FAN_REG_TINBSEL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x1C) #define NPCM7XX_FAN_TCKC_CLKX_NONE 0 #define NPCM7XX_FAN_TCKC_CLK1_APB BIT(0) #define NPCM7XX_FAN_TCKC_CLK2_APB BIT(3) #define NPCM7XX_FAN_TMCTRL_TBEN BIT(6) #define NPCM7XX_FAN_TMCTRL_TAEN BIT(5) #define NPCM7XX_FAN_TMCTRL_TBEDG BIT(4) #define NPCM7XX_FAN_TMCTRL_TAEDG BIT(3) #define NPCM7XX_FAN_TMCTRL_MODE_5 BIT(2) #define NPCM7XX_FAN_TICLR_CLEAR_ALL GENMASK(5, 0) #define NPCM7XX_FAN_TICLR_TFCLR BIT(5) #define NPCM7XX_FAN_TICLR_TECLR BIT(4) #define NPCM7XX_FAN_TICLR_TDCLR BIT(3) #define NPCM7XX_FAN_TICLR_TCCLR BIT(2) #define NPCM7XX_FAN_TICLR_TBCLR BIT(1) #define NPCM7XX_FAN_TICLR_TACLR BIT(0) #define NPCM7XX_FAN_TIEN_ENABLE_ALL GENMASK(5, 0) #define NPCM7XX_FAN_TIEN_TFIEN BIT(5) #define NPCM7XX_FAN_TIEN_TEIEN BIT(4) #define NPCM7XX_FAN_TIEN_TDIEN BIT(3) #define NPCM7XX_FAN_TIEN_TCIEN BIT(2) #define NPCM7XX_FAN_TIEN_TBIEN BIT(1) #define NPCM7XX_FAN_TIEN_TAIEN BIT(0) #define NPCM7XX_FAN_TICTRL_TFPND BIT(5) #define NPCM7XX_FAN_TICTRL_TEPND BIT(4) #define NPCM7XX_FAN_TICTRL_TDPND BIT(3) #define NPCM7XX_FAN_TICTRL_TCPND BIT(2) #define NPCM7XX_FAN_TICTRL_TBPND BIT(1) #define NPCM7XX_FAN_TICTRL_TAPND BIT(0) #define NPCM7XX_FAN_TCPCFG_HIBEN BIT(7) #define NPCM7XX_FAN_TCPCFG_EQBEN BIT(6) #define NPCM7XX_FAN_TCPCFG_LOBEN BIT(5) #define NPCM7XX_FAN_TCPCFG_CPBSEL BIT(4) #define NPCM7XX_FAN_TCPCFG_HIAEN BIT(3) #define NPCM7XX_FAN_TCPCFG_EQAEN BIT(2) #define NPCM7XX_FAN_TCPCFG_LOAEN BIT(1) #define NPCM7XX_FAN_TCPCFG_CPASEL BIT(0) /* FAN General Definition */ /* Define the maximum FAN channel number */ #define NPCM7XX_FAN_MAX_MODULE 8 #define NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE 2 #define NPCM7XX_FAN_MAX_CHN_NUM 16 /* * Get Fan Tach Timeout (base on clock 214843.75Hz, 1 cnt = 4.654us) * Timeout 94ms ~= 0x5000 * (The minimum FAN speed could to support ~640RPM/pulse 1, * 320RPM/pulse 2, ...-- 10.6Hz) */ #define NPCM7XX_FAN_TIMEOUT 0x5000 #define NPCM7XX_FAN_TCNT 0xFFFF #define NPCM7XX_FAN_TCPA (NPCM7XX_FAN_TCNT - NPCM7XX_FAN_TIMEOUT) #define NPCM7XX_FAN_TCPB (NPCM7XX_FAN_TCNT - NPCM7XX_FAN_TIMEOUT) #define NPCM7XX_FAN_POLL_TIMER_200MS 200 #define NPCM7XX_FAN_DEFAULT_PULSE_PER_REVOLUTION 2 #define NPCM7XX_FAN_TINASEL_FANIN_DEFAULT 0 #define NPCM7XX_FAN_CLK_PRESCALE 255 #define NPCM7XX_FAN_CMPA 0 #define NPCM7XX_FAN_CMPB 1 /* Obtain the fan number */ #define NPCM7XX_FAN_INPUT(fan, cmp) (((fan) << 1) + (cmp)) /* fan sample status */ #define FAN_DISABLE 0xFF #define FAN_INIT 0x00 #define FAN_PREPARE_TO_GET_FIRST_CAPTURE 0x01 #define FAN_ENOUGH_SAMPLE 0x02 struct npcm7xx_fan_dev { u8 fan_st_flg; u8 fan_pls_per_rev; u16 fan_cnt; u32 fan_cnt_tmp; }; struct npcm7xx_cooling_device { char name[THERMAL_NAME_LENGTH]; struct npcm7xx_pwm_fan_data *data; struct thermal_cooling_device *tcdev; int pwm_port; u8 *cooling_levels; u8 max_state; u8 cur_state; }; struct npcm7xx_pwm_fan_data { void __iomem *pwm_base; void __iomem *fan_base; unsigned long pwm_clk_freq; unsigned long fan_clk_freq; struct clk *pwm_clk; struct clk *fan_clk; struct mutex pwm_lock[NPCM7XX_PWM_MAX_MODULES]; spinlock_t fan_lock[NPCM7XX_FAN_MAX_MODULE]; int fan_irq[NPCM7XX_FAN_MAX_MODULE]; bool pwm_present[NPCM7XX_PWM_MAX_CHN_NUM]; bool fan_present[NPCM7XX_FAN_MAX_CHN_NUM]; u32 input_clk_freq; struct timer_list fan_timer; struct npcm7xx_fan_dev fan_dev[NPCM7XX_FAN_MAX_CHN_NUM]; struct npcm7xx_cooling_device *cdev[NPCM7XX_PWM_MAX_CHN_NUM]; u8 fan_select; }; static int npcm7xx_pwm_config_set(struct npcm7xx_pwm_fan_data *data, int channel, u16 val) { u32 pwm_ch = (channel % NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); u32 module = (channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); u32 tmp_buf, ctrl_en_bit, env_bit; /* * Config PWM Comparator register for setting duty cycle */ mutex_lock(&data->pwm_lock[module]); /* write new CMR value */ iowrite32(val, NPCM7XX_PWM_REG_CMRx(data->pwm_base, module, pwm_ch)); tmp_buf = ioread32(NPCM7XX_PWM_REG_CR(data->pwm_base, module)); switch (pwm_ch) { case 0: ctrl_en_bit = NPCM7XX_PWM_CTRL_CH0_EN_BIT; env_bit = NPCM7XX_PWM_CTRL_CH0_INV_BIT; break; case 1: ctrl_en_bit = NPCM7XX_PWM_CTRL_CH1_EN_BIT; env_bit = NPCM7XX_PWM_CTRL_CH1_INV_BIT; break; case 2: ctrl_en_bit = NPCM7XX_PWM_CTRL_CH2_EN_BIT; env_bit = NPCM7XX_PWM_CTRL_CH2_INV_BIT; break; case 3: ctrl_en_bit = NPCM7XX_PWM_CTRL_CH3_EN_BIT; env_bit = NPCM7XX_PWM_CTRL_CH3_INV_BIT; break; default: mutex_unlock(&data->pwm_lock[module]); return -ENODEV; } if (val == 0) { /* Disable PWM */ tmp_buf &= ~ctrl_en_bit; tmp_buf |= env_bit; } else { /* Enable PWM */ tmp_buf |= ctrl_en_bit; tmp_buf &= ~env_bit; } iowrite32(tmp_buf, NPCM7XX_PWM_REG_CR(data->pwm_base, module)); mutex_unlock(&data->pwm_lock[module]); return 0; } static inline void npcm7xx_fan_start_capture(struct npcm7xx_pwm_fan_data *data, u8 fan, u8 cmp) { u8 fan_id; u8 reg_mode; u8 reg_int; unsigned long flags; fan_id = NPCM7XX_FAN_INPUT(fan, cmp); /* to check whether any fan tach is enable */ if (data->fan_dev[fan_id].fan_st_flg != FAN_DISABLE) { /* reset status */ spin_lock_irqsave(&data->fan_lock[fan], flags); data->fan_dev[fan_id].fan_st_flg = FAN_INIT; reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); /* * the interrupt enable bits do not need to be cleared before * it sets, the interrupt enable bits are cleared only on reset. * the clock unit control register is behaving in the same * manner that the interrupt enable register behave. */ if (cmp == NPCM7XX_FAN_CMPA) { /* enable interrupt */ iowrite8(reg_int | (NPCM7XX_FAN_TIEN_TAIEN | NPCM7XX_FAN_TIEN_TEIEN), NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); reg_mode = NPCM7XX_FAN_TCKC_CLK1_APB | ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); /* start to Capture */ iowrite8(reg_mode, NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); } else { /* enable interrupt */ iowrite8(reg_int | (NPCM7XX_FAN_TIEN_TBIEN | NPCM7XX_FAN_TIEN_TFIEN), NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); reg_mode = NPCM7XX_FAN_TCKC_CLK2_APB | ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); /* start to Capture */ iowrite8(reg_mode, NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); } spin_unlock_irqrestore(&data->fan_lock[fan], flags); } } /* * Enable a background timer to poll fan tach value, (200ms * 4) * to polling all fan */ static void npcm7xx_fan_polling(struct timer_list *t) { struct npcm7xx_pwm_fan_data *data; int i; data = from_timer(data, t, fan_timer); /* * Polling two module per one round, * FAN01 & FAN89 / FAN23 & FAN1011 / FAN45 & FAN1213 / FAN67 & FAN1415 */ for (i = data->fan_select; i < NPCM7XX_FAN_MAX_MODULE; i = i + 4) { /* clear the flag and reset the counter (TCNT) */ iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL, NPCM7XX_FAN_REG_TICLR(data->fan_base, i)); if (data->fan_present[i * 2]) { iowrite16(NPCM7XX_FAN_TCNT, NPCM7XX_FAN_REG_TCNT1(data->fan_base, i)); npcm7xx_fan_start_capture(data, i, NPCM7XX_FAN_CMPA); } if (data->fan_present[(i * 2) + 1]) { iowrite16(NPCM7XX_FAN_TCNT, NPCM7XX_FAN_REG_TCNT2(data->fan_base, i)); npcm7xx_fan_start_capture(data, i, NPCM7XX_FAN_CMPB); } } data->fan_select++; data->fan_select &= 0x3; /* reset the timer interval */ data->fan_timer.expires = jiffies + msecs_to_jiffies(NPCM7XX_FAN_POLL_TIMER_200MS); add_timer(&data->fan_timer); } static inline void npcm7xx_fan_compute(struct npcm7xx_pwm_fan_data *data, u8 fan, u8 cmp, u8 fan_id, u8 flag_int, u8 flag_mode, u8 flag_clear) { u8 reg_int; u8 reg_mode; u16 fan_cap; if (cmp == NPCM7XX_FAN_CMPA) fan_cap = ioread16(NPCM7XX_FAN_REG_TCRA(data->fan_base, fan)); else fan_cap = ioread16(NPCM7XX_FAN_REG_TCRB(data->fan_base, fan)); /* clear capature flag, H/W will auto reset the NPCM7XX_FAN_TCNTx */ iowrite8(flag_clear, NPCM7XX_FAN_REG_TICLR(data->fan_base, fan)); if (data->fan_dev[fan_id].fan_st_flg == FAN_INIT) { /* First capture, drop it */ data->fan_dev[fan_id].fan_st_flg = FAN_PREPARE_TO_GET_FIRST_CAPTURE; /* reset counter */ data->fan_dev[fan_id].fan_cnt_tmp = 0; } else if (data->fan_dev[fan_id].fan_st_flg < FAN_ENOUGH_SAMPLE) { /* * collect the enough sample, * (ex: 2 pulse fan need to get 2 sample) */ data->fan_dev[fan_id].fan_cnt_tmp += (NPCM7XX_FAN_TCNT - fan_cap); data->fan_dev[fan_id].fan_st_flg++; } else { /* get enough sample or fan disable */ if (data->fan_dev[fan_id].fan_st_flg == FAN_ENOUGH_SAMPLE) { data->fan_dev[fan_id].fan_cnt_tmp += (NPCM7XX_FAN_TCNT - fan_cap); /* compute finial average cnt per pulse */ data->fan_dev[fan_id].fan_cnt = data->fan_dev[fan_id].fan_cnt_tmp / FAN_ENOUGH_SAMPLE; data->fan_dev[fan_id].fan_st_flg = FAN_INIT; } reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); /* disable interrupt */ iowrite8((reg_int & ~flag_int), NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); reg_mode = ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); /* stop capturing */ iowrite8((reg_mode & ~flag_mode), NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); } } static inline void npcm7xx_check_cmp(struct npcm7xx_pwm_fan_data *data, u8 fan, u8 cmp, u8 flag) { u8 reg_int; u8 reg_mode; u8 flag_timeout; u8 flag_cap; u8 flag_clear; u8 flag_int; u8 flag_mode; u8 fan_id; fan_id = NPCM7XX_FAN_INPUT(fan, cmp); if (cmp == NPCM7XX_FAN_CMPA) { flag_cap = NPCM7XX_FAN_TICTRL_TAPND; flag_timeout = NPCM7XX_FAN_TICTRL_TEPND; flag_int = NPCM7XX_FAN_TIEN_TAIEN | NPCM7XX_FAN_TIEN_TEIEN; flag_mode = NPCM7XX_FAN_TCKC_CLK1_APB; flag_clear = NPCM7XX_FAN_TICLR_TACLR | NPCM7XX_FAN_TICLR_TECLR; } else { flag_cap = NPCM7XX_FAN_TICTRL_TBPND; flag_timeout = NPCM7XX_FAN_TICTRL_TFPND; flag_int = NPCM7XX_FAN_TIEN_TBIEN | NPCM7XX_FAN_TIEN_TFIEN; flag_mode = NPCM7XX_FAN_TCKC_CLK2_APB; flag_clear = NPCM7XX_FAN_TICLR_TBCLR | NPCM7XX_FAN_TICLR_TFCLR; } if (flag & flag_timeout) { reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); /* disable interrupt */ iowrite8((reg_int & ~flag_int), NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); /* clear interrupt flag */ iowrite8(flag_clear, NPCM7XX_FAN_REG_TICLR(data->fan_base, fan)); reg_mode = ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); /* stop capturing */ iowrite8((reg_mode & ~flag_mode), NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); /* * If timeout occurs (NPCM7XX_FAN_TIMEOUT), the fan doesn't * connect or speed is lower than 10.6Hz (320RPM/pulse2). * In these situation, the RPM output should be zero. */ data->fan_dev[fan_id].fan_cnt = 0; } else { /* input capture is occurred */ if (flag & flag_cap) npcm7xx_fan_compute(data, fan, cmp, fan_id, flag_int, flag_mode, flag_clear); } } static irqreturn_t npcm7xx_fan_isr(int irq, void *dev_id) { struct npcm7xx_pwm_fan_data *data = dev_id; unsigned long flags; int module; u8 flag; module = irq - data->fan_irq[0]; spin_lock_irqsave(&data->fan_lock[module], flags); flag = ioread8(NPCM7XX_FAN_REG_TICTRL(data->fan_base, module)); if (flag > 0) { npcm7xx_check_cmp(data, module, NPCM7XX_FAN_CMPA, flag); npcm7xx_check_cmp(data, module, NPCM7XX_FAN_CMPB, flag); spin_unlock_irqrestore(&data->fan_lock[module], flags); return IRQ_HANDLED; } spin_unlock_irqrestore(&data->fan_lock[module], flags); return IRQ_NONE; } static int npcm7xx_read_pwm(struct device *dev, u32 attr, int channel, long *val) { struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev); u32 pmw_ch = (channel % NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); u32 module = (channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); switch (attr) { case hwmon_pwm_input: *val = ioread32 (NPCM7XX_PWM_REG_CMRx(data->pwm_base, module, pmw_ch)); return 0; default: return -EOPNOTSUPP; } } static int npcm7xx_write_pwm(struct device *dev, u32 attr, int channel, long val) { struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev); int err; switch (attr) { case hwmon_pwm_input: if (val < 0 || val > NPCM7XX_PWM_CMR_MAX) return -EINVAL; err = npcm7xx_pwm_config_set(data, channel, (u16)val); break; default: err = -EOPNOTSUPP; break; } return err; } static umode_t npcm7xx_pwm_is_visible(const void *_data, u32 attr, int channel) { const struct npcm7xx_pwm_fan_data *data = _data; if (!data->pwm_present[channel]) return 0; switch (attr) { case hwmon_pwm_input: return 0644; default: return 0; } } static int npcm7xx_read_fan(struct device *dev, u32 attr, int channel, long *val) { struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev); switch (attr) { case hwmon_fan_input: *val = 0; if (data->fan_dev[channel].fan_cnt <= 0) return data->fan_dev[channel].fan_cnt; /* Convert the raw reading to RPM */ if (data->fan_dev[channel].fan_cnt > 0 && data->fan_dev[channel].fan_pls_per_rev > 0) *val = ((data->input_clk_freq * 60) / (data->fan_dev[channel].fan_cnt * data->fan_dev[channel].fan_pls_per_rev)); return 0; default: return -EOPNOTSUPP; } } static umode_t npcm7xx_fan_is_visible(const void *_data, u32 attr, int channel) { const struct npcm7xx_pwm_fan_data *data = _data; if (!data->fan_present[channel]) return 0; switch (attr) { case hwmon_fan_input: return 0444; default: return 0; } } static int npcm7xx_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { switch (type) { case hwmon_pwm: return npcm7xx_read_pwm(dev, attr, channel, val); case hwmon_fan: return npcm7xx_read_fan(dev, attr, channel, val); default: return -EOPNOTSUPP; } } static int npcm7xx_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { switch (type) { case hwmon_pwm: return npcm7xx_write_pwm(dev, attr, channel, val); default: return -EOPNOTSUPP; } } static umode_t npcm7xx_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { switch (type) { case hwmon_pwm: return npcm7xx_pwm_is_visible(data, attr, channel); case hwmon_fan: return npcm7xx_fan_is_visible(data, attr, channel); default: return 0; } } static const struct hwmon_channel_info *npcm7xx_info[] = { HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT, HWMON_PWM_INPUT, HWMON_PWM_INPUT, HWMON_PWM_INPUT, HWMON_PWM_INPUT, HWMON_PWM_INPUT, HWMON_PWM_INPUT, HWMON_PWM_INPUT), HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT), NULL }; static const struct hwmon_ops npcm7xx_hwmon_ops = { .is_visible = npcm7xx_is_visible, .read = npcm7xx_read, .write = npcm7xx_write, }; static const struct hwmon_chip_info npcm7xx_chip_info = { .ops = &npcm7xx_hwmon_ops, .info = npcm7xx_info, }; static u32 npcm7xx_pwm_init(struct npcm7xx_pwm_fan_data *data) { int m, ch; u32 prescale_val, output_freq; data->pwm_clk_freq = clk_get_rate(data->pwm_clk); /* Adjust NPCM7xx PWMs output frequency to ~25Khz */ output_freq = data->pwm_clk_freq / PWN_CNT_DEFAULT; prescale_val = DIV_ROUND_CLOSEST(output_freq, PWM_OUTPUT_FREQ_25KHZ); /* If prescale_val = 0, then the prescale output clock is stopped */ if (prescale_val < MIN_PRESCALE1) prescale_val = MIN_PRESCALE1; /* * prescale_val need to decrement in one because in the PWM Prescale * register the Prescale value increment by one */ prescale_val--; /* Setting PWM Prescale Register value register to both modules */ prescale_val |= (prescale_val << NPCM7XX_PWM_PRESCALE_SHIFT_CH01); for (m = 0; m < NPCM7XX_PWM_MAX_MODULES ; m++) { iowrite32(prescale_val, NPCM7XX_PWM_REG_PR(data->pwm_base, m)); iowrite32(NPCM7XX_PWM_PRESCALE2_DEFAULT, NPCM7XX_PWM_REG_CSR(data->pwm_base, m)); iowrite32(NPCM7XX_PWM_CTRL_MODE_DEFAULT, NPCM7XX_PWM_REG_CR(data->pwm_base, m)); for (ch = 0; ch < NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE; ch++) { iowrite32(NPCM7XX_PWM_COUNTER_DEFAULT_NUM, NPCM7XX_PWM_REG_CNRx(data->pwm_base, m, ch)); } } return output_freq / ((prescale_val & 0xf) + 1); } static void npcm7xx_fan_init(struct npcm7xx_pwm_fan_data *data) { int md; int ch; int i; u32 apb_clk_freq; for (md = 0; md < NPCM7XX_FAN_MAX_MODULE; md++) { /* stop FAN0~7 clock */ iowrite8(NPCM7XX_FAN_TCKC_CLKX_NONE, NPCM7XX_FAN_REG_TCKC(data->fan_base, md)); /* disable all interrupt */ iowrite8(0x00, NPCM7XX_FAN_REG_TIEN(data->fan_base, md)); /* clear all interrupt */ iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL, NPCM7XX_FAN_REG_TICLR(data->fan_base, md)); /* set FAN0~7 clock prescaler */ iowrite8(NPCM7XX_FAN_CLK_PRESCALE, NPCM7XX_FAN_REG_TPRSC(data->fan_base, md)); /* set FAN0~7 mode (high-to-low transition) */ iowrite8((NPCM7XX_FAN_TMCTRL_MODE_5 | NPCM7XX_FAN_TMCTRL_TBEN | NPCM7XX_FAN_TMCTRL_TAEN), NPCM7XX_FAN_REG_TMCTRL(data->fan_base, md)); /* set FAN0~7 Initial Count/Cap */ iowrite16(NPCM7XX_FAN_TCNT, NPCM7XX_FAN_REG_TCNT1(data->fan_base, md)); iowrite16(NPCM7XX_FAN_TCNT, NPCM7XX_FAN_REG_TCNT2(data->fan_base, md)); /* set FAN0~7 compare (equal to count) */ iowrite8((NPCM7XX_FAN_TCPCFG_EQAEN | NPCM7XX_FAN_TCPCFG_EQBEN), NPCM7XX_FAN_REG_TCPCFG(data->fan_base, md)); /* set FAN0~7 compare value */ iowrite16(NPCM7XX_FAN_TCPA, NPCM7XX_FAN_REG_TCPA(data->fan_base, md)); iowrite16(NPCM7XX_FAN_TCPB, NPCM7XX_FAN_REG_TCPB(data->fan_base, md)); /* set FAN0~7 fan input FANIN 0~15 */ iowrite8(NPCM7XX_FAN_TINASEL_FANIN_DEFAULT, NPCM7XX_FAN_REG_TINASEL(data->fan_base, md)); iowrite8(NPCM7XX_FAN_TINASEL_FANIN_DEFAULT, NPCM7XX_FAN_REG_TINBSEL(data->fan_base, md)); for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE; i++) { ch = md * NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE + i; data->fan_dev[ch].fan_st_flg = FAN_DISABLE; data->fan_dev[ch].fan_pls_per_rev = NPCM7XX_FAN_DEFAULT_PULSE_PER_REVOLUTION; data->fan_dev[ch].fan_cnt = 0; } } apb_clk_freq = clk_get_rate(data->fan_clk); /* Fan tach input clock = APB clock / prescalar, default is 255. */ data->input_clk_freq = apb_clk_freq / (NPCM7XX_FAN_CLK_PRESCALE + 1); } static int npcm7xx_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev, unsigned long *state) { struct npcm7xx_cooling_device *cdev = tcdev->devdata; *state = cdev->max_state; return 0; } static int npcm7xx_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev, unsigned long *state) { struct npcm7xx_cooling_device *cdev = tcdev->devdata; *state = cdev->cur_state; return 0; } static int npcm7xx_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev, unsigned long state) { struct npcm7xx_cooling_device *cdev = tcdev->devdata; int ret; if (state > cdev->max_state) return -EINVAL; cdev->cur_state = state; ret = npcm7xx_pwm_config_set(cdev->data, cdev->pwm_port, cdev->cooling_levels[cdev->cur_state]); return ret; } static const struct thermal_cooling_device_ops npcm7xx_pwm_cool_ops = { .get_max_state = npcm7xx_pwm_cz_get_max_state, .get_cur_state = npcm7xx_pwm_cz_get_cur_state, .set_cur_state = npcm7xx_pwm_cz_set_cur_state, }; static int npcm7xx_create_pwm_cooling(struct device *dev, struct device_node *child, struct npcm7xx_pwm_fan_data *data, u32 pwm_port, u8 num_levels) { int ret; struct npcm7xx_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, THERMAL_NAME_LENGTH, "%pOFn%d", child, pwm_port); cdev->tcdev = devm_thermal_of_cooling_device_register(dev, child, cdev->name, cdev, &npcm7xx_pwm_cool_ops); if (IS_ERR(cdev->tcdev)) return PTR_ERR(cdev->tcdev); cdev->data = data; cdev->pwm_port = pwm_port; data->cdev[pwm_port] = cdev; return 0; } static int npcm7xx_en_pwm_fan(struct device *dev, struct device_node *child, struct npcm7xx_pwm_fan_data *data) { u8 *fan_ch; u32 pwm_port; int ret, fan_cnt; u8 index, ch; ret = of_property_read_u32(child, "reg", &pwm_port); if (ret) return ret; data->pwm_present[pwm_port] = true; ret = npcm7xx_pwm_config_set(data, pwm_port, NPCM7XX_PWM_CMR_DEFAULT_NUM); ret = of_property_count_u8_elems(child, "cooling-levels"); if (ret > 0) { ret = npcm7xx_create_pwm_cooling(dev, child, data, pwm_port, ret); if (ret) return ret; } fan_cnt = of_property_count_u8_elems(child, "fan-tach-ch"); if (fan_cnt < 1) return -EINVAL; fan_ch = devm_kcalloc(dev, fan_cnt, sizeof(*fan_ch), GFP_KERNEL); if (!fan_ch) return -ENOMEM; ret = of_property_read_u8_array(child, "fan-tach-ch", fan_ch, fan_cnt); if (ret) return ret; for (ch = 0; ch < fan_cnt; ch++) { index = fan_ch[ch]; data->fan_present[index] = true; data->fan_dev[index].fan_st_flg = FAN_INIT; } return 0; } static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *np, *child; struct npcm7xx_pwm_fan_data *data; struct resource *res; struct device *hwmon; char name[20]; int ret, cnt; u32 output_freq; u32 i; np = dev->of_node; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm"); if (!res) { dev_err(dev, "pwm resource not found\n"); return -ENODEV; } data->pwm_base = devm_ioremap_resource(dev, res); dev_dbg(dev, "pwm base resource is %pR\n", res); if (IS_ERR(data->pwm_base)) return PTR_ERR(data->pwm_base); data->pwm_clk = devm_clk_get(dev, "pwm"); if (IS_ERR(data->pwm_clk)) { dev_err(dev, "couldn't get pwm clock\n"); return PTR_ERR(data->pwm_clk); } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fan"); if (!res) { dev_err(dev, "fan resource not found\n"); return -ENODEV; } data->fan_base = devm_ioremap_resource(dev, res); dev_dbg(dev, "fan base resource is %pR\n", res); if (IS_ERR(data->fan_base)) return PTR_ERR(data->fan_base); data->fan_clk = devm_clk_get(dev, "fan"); if (IS_ERR(data->fan_clk)) { dev_err(dev, "couldn't get fan clock\n"); return PTR_ERR(data->fan_clk); } output_freq = npcm7xx_pwm_init(data); npcm7xx_fan_init(data); for (cnt = 0; cnt < NPCM7XX_PWM_MAX_MODULES ; cnt++) mutex_init(&data->pwm_lock[cnt]); for (i = 0; i < NPCM7XX_FAN_MAX_MODULE; i++) { spin_lock_init(&data->fan_lock[i]); data->fan_irq[i] = platform_get_irq(pdev, i); if (data->fan_irq[i] < 0) return data->fan_irq[i]; sprintf(name, "NPCM7XX-FAN-MD%d", i); ret = devm_request_irq(dev, data->fan_irq[i], npcm7xx_fan_isr, 0, name, (void *)data); if (ret) { dev_err(dev, "register IRQ fan%d failed\n", i); return ret; } } for_each_child_of_node(np, child) { ret = npcm7xx_en_pwm_fan(dev, child, data); if (ret) { dev_err(dev, "enable pwm and fan failed\n"); of_node_put(child); return ret; } } hwmon = devm_hwmon_device_register_with_info(dev, "npcm7xx_pwm_fan", data, &npcm7xx_chip_info, NULL); if (IS_ERR(hwmon)) { dev_err(dev, "unable to register hwmon device\n"); return PTR_ERR(hwmon); } for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM; i++) { if (data->fan_present[i]) { /* fan timer initialization */ data->fan_timer.expires = jiffies + msecs_to_jiffies(NPCM7XX_FAN_POLL_TIMER_200MS); timer_setup(&data->fan_timer, npcm7xx_fan_polling, 0); add_timer(&data->fan_timer); break; } } pr_info("NPCM7XX PWM-FAN Driver probed, output Freq %dHz[PWM], input Freq %dHz[FAN]\n", output_freq, data->input_clk_freq); return 0; } static const struct of_device_id of_pwm_fan_match_table[] = { { .compatible = "nuvoton,npcm750-pwm-fan", }, {}, }; MODULE_DEVICE_TABLE(of, of_pwm_fan_match_table); static struct platform_driver npcm7xx_pwm_fan_driver = { .probe = npcm7xx_pwm_fan_probe, .driver = { .name = "npcm7xx_pwm_fan", .of_match_table = of_pwm_fan_match_table, }, }; module_platform_driver(npcm7xx_pwm_fan_driver); MODULE_DESCRIPTION("Nuvoton NPCM7XX PWM and Fan Tacho driver"); MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>"); MODULE_LICENSE("GPL v2");
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