drivers/pwm/pwm-dwc.h

   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);