144 lines
5.8 KiB
C
144 lines
5.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) STMicroelectronics 2016
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* Author: Benjamin Gaignard <benjamin.gaignard@st.com>
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*/
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#ifndef _LINUX_STM32_GPTIMER_H_
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#define _LINUX_STM32_GPTIMER_H_
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#include <linux/clk.h>
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#include <linux/dmaengine.h>
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#include <linux/dma-mapping.h>
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#include <linux/regmap.h>
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#define TIM_CR1 0x00 /* Control Register 1 */
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#define TIM_CR2 0x04 /* Control Register 2 */
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#define TIM_SMCR 0x08 /* Slave mode control reg */
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#define TIM_DIER 0x0C /* DMA/interrupt register */
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#define TIM_SR 0x10 /* Status register */
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#define TIM_EGR 0x14 /* Event Generation Reg */
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#define TIM_CCMR1 0x18 /* Capt/Comp 1 Mode Reg */
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#define TIM_CCMR2 0x1C /* Capt/Comp 2 Mode Reg */
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#define TIM_CCER 0x20 /* Capt/Comp Enable Reg */
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#define TIM_CNT 0x24 /* Counter */
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#define TIM_PSC 0x28 /* Prescaler */
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#define TIM_ARR 0x2c /* Auto-Reload Register */
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#define TIM_CCR1 0x34 /* Capt/Comp Register 1 */
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#define TIM_CCR2 0x38 /* Capt/Comp Register 2 */
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#define TIM_CCR3 0x3C /* Capt/Comp Register 3 */
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#define TIM_CCR4 0x40 /* Capt/Comp Register 4 */
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#define TIM_BDTR 0x44 /* Break and Dead-Time Reg */
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#define TIM_DCR 0x48 /* DMA control register */
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#define TIM_DMAR 0x4C /* DMA register for transfer */
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#define TIM_CR1_CEN BIT(0) /* Counter Enable */
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#define TIM_CR1_DIR BIT(4) /* Counter Direction */
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#define TIM_CR1_ARPE BIT(7) /* Auto-reload Preload Ena */
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#define TIM_CR2_MMS (BIT(4) | BIT(5) | BIT(6)) /* Master mode selection */
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#define TIM_CR2_MMS2 GENMASK(23, 20) /* Master mode selection 2 */
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#define TIM_SMCR_SMS (BIT(0) | BIT(1) | BIT(2)) /* Slave mode selection */
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#define TIM_SMCR_TS (BIT(4) | BIT(5) | BIT(6)) /* Trigger selection */
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#define TIM_DIER_UIE BIT(0) /* Update interrupt */
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#define TIM_DIER_UDE BIT(8) /* Update DMA request Enable */
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#define TIM_DIER_CC1DE BIT(9) /* CC1 DMA request Enable */
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#define TIM_DIER_CC2DE BIT(10) /* CC2 DMA request Enable */
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#define TIM_DIER_CC3DE BIT(11) /* CC3 DMA request Enable */
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#define TIM_DIER_CC4DE BIT(12) /* CC4 DMA request Enable */
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#define TIM_DIER_COMDE BIT(13) /* COM DMA request Enable */
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#define TIM_DIER_TDE BIT(14) /* Trigger DMA request Enable */
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#define TIM_SR_UIF BIT(0) /* Update interrupt flag */
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#define TIM_EGR_UG BIT(0) /* Update Generation */
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#define TIM_CCMR_PE BIT(3) /* Channel Preload Enable */
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#define TIM_CCMR_M1 (BIT(6) | BIT(5)) /* Channel PWM Mode 1 */
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#define TIM_CCMR_CC1S (BIT(0) | BIT(1)) /* Capture/compare 1 sel */
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#define TIM_CCMR_IC1PSC GENMASK(3, 2) /* Input capture 1 prescaler */
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#define TIM_CCMR_CC2S (BIT(8) | BIT(9)) /* Capture/compare 2 sel */
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#define TIM_CCMR_IC2PSC GENMASK(11, 10) /* Input capture 2 prescaler */
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#define TIM_CCMR_CC1S_TI1 BIT(0) /* IC1/IC3 selects TI1/TI3 */
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#define TIM_CCMR_CC1S_TI2 BIT(1) /* IC1/IC3 selects TI2/TI4 */
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#define TIM_CCMR_CC2S_TI2 BIT(8) /* IC2/IC4 selects TI2/TI4 */
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#define TIM_CCMR_CC2S_TI1 BIT(9) /* IC2/IC4 selects TI1/TI3 */
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#define TIM_CCER_CC1E BIT(0) /* Capt/Comp 1 out Ena */
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#define TIM_CCER_CC1P BIT(1) /* Capt/Comp 1 Polarity */
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#define TIM_CCER_CC1NE BIT(2) /* Capt/Comp 1N out Ena */
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#define TIM_CCER_CC1NP BIT(3) /* Capt/Comp 1N Polarity */
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#define TIM_CCER_CC2E BIT(4) /* Capt/Comp 2 out Ena */
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#define TIM_CCER_CC2P BIT(5) /* Capt/Comp 2 Polarity */
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#define TIM_CCER_CC3E BIT(8) /* Capt/Comp 3 out Ena */
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#define TIM_CCER_CC3P BIT(9) /* Capt/Comp 3 Polarity */
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#define TIM_CCER_CC4E BIT(12) /* Capt/Comp 4 out Ena */
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#define TIM_CCER_CC4P BIT(13) /* Capt/Comp 4 Polarity */
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#define TIM_CCER_CCXE (BIT(0) | BIT(4) | BIT(8) | BIT(12))
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#define TIM_BDTR_BKE(x) BIT(12 + (x) * 12) /* Break input enable */
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#define TIM_BDTR_BKP(x) BIT(13 + (x) * 12) /* Break input polarity */
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#define TIM_BDTR_AOE BIT(14) /* Automatic Output Enable */
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#define TIM_BDTR_MOE BIT(15) /* Main Output Enable */
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#define TIM_BDTR_BKF(x) (0xf << (16 + (x) * 4))
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#define TIM_DCR_DBA GENMASK(4, 0) /* DMA base addr */
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#define TIM_DCR_DBL GENMASK(12, 8) /* DMA burst len */
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#define MAX_TIM_PSC 0xFFFF
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#define MAX_TIM_ICPSC 0x3
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#define TIM_CR2_MMS_SHIFT 4
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#define TIM_CR2_MMS2_SHIFT 20
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#define TIM_SMCR_SMS_SLAVE_MODE_DISABLED 0 /* counts on internal clock when CEN=1 */
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#define TIM_SMCR_SMS_ENCODER_MODE_1 1 /* counts TI1FP1 edges, depending on TI2FP2 level */
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#define TIM_SMCR_SMS_ENCODER_MODE_2 2 /* counts TI2FP2 edges, depending on TI1FP1 level */
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#define TIM_SMCR_SMS_ENCODER_MODE_3 3 /* counts on both TI1FP1 and TI2FP2 edges */
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#define TIM_SMCR_TS_SHIFT 4
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#define TIM_BDTR_BKF_MASK 0xF
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#define TIM_BDTR_BKF_SHIFT(x) (16 + (x) * 4)
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enum stm32_timers_dmas {
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STM32_TIMERS_DMA_CH1,
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STM32_TIMERS_DMA_CH2,
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STM32_TIMERS_DMA_CH3,
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STM32_TIMERS_DMA_CH4,
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STM32_TIMERS_DMA_UP,
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STM32_TIMERS_DMA_TRIG,
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STM32_TIMERS_DMA_COM,
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STM32_TIMERS_MAX_DMAS,
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};
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/**
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* struct stm32_timers_dma - STM32 timer DMA handling.
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* @completion: end of DMA transfer completion
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* @phys_base: control registers physical base address
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* @lock: protect DMA access
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* @chan: DMA channel in use
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* @chans: DMA channels available for this timer instance
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*/
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struct stm32_timers_dma {
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struct completion completion;
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phys_addr_t phys_base;
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struct mutex lock;
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struct dma_chan *chan;
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struct dma_chan *chans[STM32_TIMERS_MAX_DMAS];
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};
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struct stm32_timers {
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struct clk *clk;
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struct regmap *regmap;
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u32 max_arr;
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struct stm32_timers_dma dma; /* Only to be used by the parent */
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};
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#if IS_REACHABLE(CONFIG_MFD_STM32_TIMERS)
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int stm32_timers_dma_burst_read(struct device *dev, u32 *buf,
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enum stm32_timers_dmas id, u32 reg,
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unsigned int num_reg, unsigned int bursts,
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unsigned long tmo_ms);
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#else
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static inline int stm32_timers_dma_burst_read(struct device *dev, u32 *buf,
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enum stm32_timers_dmas id,
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u32 reg,
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unsigned int num_reg,
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unsigned int bursts,
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unsigned long tmo_ms)
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{
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return -ENODEV;
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}
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#endif
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#endif
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