1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * DesignWare PWM Controller driver 4 * 5 * Copyright (C) 2018-2020 Intel Corporation 6 * 7 * Author: Felipe Balbi (Intel) 8 * Author: Jarkko Nikula <jarkko.nikula@linux.intel.com> 9 * Author: Raymond Tan <raymond.tan@intel.com> 10 */ 11 12 MODULE_IMPORT_NS(dwc_pwm); 13 14 #define DWC_TIM_LD_CNT(n) ((n) * 0x14) 15 #define DWC_TIM_LD_CNT2(n) (((n) * 4) + 0xb0) 16 #define DWC_TIM_CUR_VAL(n) (((n) * 0x14) + 0x04) 17 #define DWC_TIM_CTRL(n) (((n) * 0x14) + 0x08) 18 #define DWC_TIM_EOI(n) (((n) * 0x14) + 0x0c) 19 #define DWC_TIM_INT_STS(n) (((n) * 0x14) + 0x10) 20 21 #define DWC_TIMERS_INT_STS 0xa0 22 #define DWC_TIMERS_EOI 0xa4 23 #define DWC_TIMERS_RAW_INT_STS 0xa8 24 #define DWC_TIMERS_COMP_VERSION 0xac 25 26 #define DWC_TIMERS_TOTAL 8 27 28 /* Timer Control Register */ 29 #define DWC_TIM_CTRL_EN BIT(0) 30 #define DWC_TIM_CTRL_MODE BIT(1) 31 #define DWC_TIM_CTRL_MODE_FREE (0 << 1) 32 #define DWC_TIM_CTRL_MODE_USER (1 << 1) 33 #define DWC_TIM_CTRL_INT_MASK BIT(2) 34 #define DWC_TIM_CTRL_PWM BIT(3) 35 36 struct dwc_pwm_info { 37 unsigned int nr; 38 unsigned int size; 39 }; 40 41 struct dwc_pwm_drvdata { 42 const struct dwc_pwm_info *info; 43 void __iomem *io_base; 44 struct pwm_chip *chips[]; 45 }; 46 47 struct dwc_pwm_ctx { 48 u32 cnt; 49 u32 cnt2; 50 u32 ctrl; 51 }; 52 53 struct dwc_pwm { 54 void __iomem *base; 55 unsigned int clk_ns; 56 struct dwc_pwm_ctx ctx[DWC_TIMERS_TOTAL]; 57 }; 58 59 static inline struct dwc_pwm *to_dwc_pwm(struct pwm_chip *chip) 60 { 61 return pwmchip_get_drvdata(chip); 62 } 63 64 static inline u32 dwc_pwm_readl(struct dwc_pwm *dwc, u32 offset) 65 { 66 return readl(dwc->base + offset); 67 } 68 69 static inline void dwc_pwm_writel(struct dwc_pwm *dwc, u32 value, u32 offset) 70 { 71 writel(value, dwc->base + offset); 72 } 73 74 extern struct pwm_chip *dwc_pwm_alloc(struct device *dev); 75