192 lines
6.6 KiB
C
192 lines
6.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2022 Renesas Electronics Corporation
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*/
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#ifndef __MFD_RZ_MTU3_H__
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#define __MFD_RZ_MTU3_H__
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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/* 8-bit shared register offsets macros */
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#define RZ_MTU3_TSTRA 0x080 /* Timer start register A */
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#define RZ_MTU3_TSTRB 0x880 /* Timer start register B */
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/* 16-bit shared register offset macros */
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#define RZ_MTU3_TDDRA 0x016 /* Timer dead time data register A */
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#define RZ_MTU3_TDDRB 0x816 /* Timer dead time data register B */
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#define RZ_MTU3_TCDRA 0x014 /* Timer cycle data register A */
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#define RZ_MTU3_TCDRB 0x814 /* Timer cycle data register B */
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#define RZ_MTU3_TCBRA 0x022 /* Timer cycle buffer register A */
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#define RZ_MTU3_TCBRB 0x822 /* Timer cycle buffer register B */
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#define RZ_MTU3_TCNTSA 0x020 /* Timer subcounter A */
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#define RZ_MTU3_TCNTSB 0x820 /* Timer subcounter B */
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/*
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* MTU5 contains 3 timer counter registers and is totaly different
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* from other channels, so we must separate its offset
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*/
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/* 8-bit register offset macros of MTU3 channels except MTU5 */
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#define RZ_MTU3_TIER 0 /* Timer interrupt register */
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#define RZ_MTU3_NFCR 1 /* Noise filter control register */
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#define RZ_MTU3_TSR 2 /* Timer status register */
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#define RZ_MTU3_TCR 3 /* Timer control register */
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#define RZ_MTU3_TCR2 4 /* Timer control register 2 */
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/* Timer mode register 1 */
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#define RZ_MTU3_TMDR1 5
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#define RZ_MTU3_TMDR1_MD GENMASK(3, 0)
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#define RZ_MTU3_TMDR1_MD_NORMAL FIELD_PREP(RZ_MTU3_TMDR1_MD, 0)
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#define RZ_MTU3_TMDR1_MD_PWMMODE1 FIELD_PREP(RZ_MTU3_TMDR1_MD, 2)
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#define RZ_MTU3_TIOR 6 /* Timer I/O control register */
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#define RZ_MTU3_TIORH 6 /* Timer I/O control register H */
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#define RZ_MTU3_TIORL 7 /* Timer I/O control register L */
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/* Only MTU3/4/6/7 have TBTM registers */
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#define RZ_MTU3_TBTM 8 /* Timer buffer operation transfer mode register */
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/* 8-bit MTU5 register offset macros */
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#define RZ_MTU3_TSTR 2 /* MTU5 Timer start register */
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#define RZ_MTU3_TCNTCMPCLR 3 /* MTU5 Timer compare match clear register */
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#define RZ_MTU3_TCRU 4 /* Timer control register U */
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#define RZ_MTU3_TCR2U 5 /* Timer control register 2U */
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#define RZ_MTU3_TIORU 6 /* Timer I/O control register U */
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#define RZ_MTU3_TCRV 7 /* Timer control register V */
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#define RZ_MTU3_TCR2V 8 /* Timer control register 2V */
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#define RZ_MTU3_TIORV 9 /* Timer I/O control register V */
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#define RZ_MTU3_TCRW 10 /* Timer control register W */
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#define RZ_MTU3_TCR2W 11 /* Timer control register 2W */
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#define RZ_MTU3_TIORW 12 /* Timer I/O control register W */
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/* 16-bit register offset macros of MTU3 channels except MTU5 */
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#define RZ_MTU3_TCNT 0 /* Timer counter */
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#define RZ_MTU3_TGRA 1 /* Timer general register A */
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#define RZ_MTU3_TGRB 2 /* Timer general register B */
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#define RZ_MTU3_TGRC 3 /* Timer general register C */
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#define RZ_MTU3_TGRD 4 /* Timer general register D */
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#define RZ_MTU3_TGRE 5 /* Timer general register E */
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#define RZ_MTU3_TGRF 6 /* Timer general register F */
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/* Timer A/D converter start request registers */
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#define RZ_MTU3_TADCR 7 /* control register */
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#define RZ_MTU3_TADCORA 8 /* cycle set register A */
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#define RZ_MTU3_TADCORB 9 /* cycle set register B */
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#define RZ_MTU3_TADCOBRA 10 /* cycle set buffer register A */
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#define RZ_MTU3_TADCOBRB 11 /* cycle set buffer register B */
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/* 16-bit MTU5 register offset macros */
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#define RZ_MTU3_TCNTU 0 /* MTU5 Timer counter U */
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#define RZ_MTU3_TGRU 1 /* MTU5 Timer general register U */
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#define RZ_MTU3_TCNTV 2 /* MTU5 Timer counter V */
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#define RZ_MTU3_TGRV 3 /* MTU5 Timer general register V */
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#define RZ_MTU3_TCNTW 4 /* MTU5 Timer counter W */
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#define RZ_MTU3_TGRW 5 /* MTU5 Timer general register W */
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/* 32-bit register offset */
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#define RZ_MTU3_TCNTLW 0 /* Timer longword counter */
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#define RZ_MTU3_TGRALW 1 /* Timer longword general register A */
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#define RZ_MTU3_TGRBLW 2 /* Timer longowrd general register B */
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#define RZ_MTU3_TMDR3 0x191 /* MTU1 Timer Mode Register 3 */
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/* Macros for setting registers */
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#define RZ_MTU3_TCR_CCLR GENMASK(7, 5)
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#define RZ_MTU3_TCR_CKEG GENMASK(4, 3)
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#define RZ_MTU3_TCR_TPCS GENMASK(2, 0)
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#define RZ_MTU3_TCR_CCLR_TGRA BIT(5)
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#define RZ_MTU3_TCR_CCLR_TGRC FIELD_PREP(RZ_MTU3_TCR_CCLR, 5)
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#define RZ_MTU3_TCR_CKEG_RISING FIELD_PREP(RZ_MTU3_TCR_CKEG, 0)
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#define RZ_MTU3_TIOR_IOB GENMASK(7, 4)
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#define RZ_MTU3_TIOR_IOA GENMASK(3, 0)
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#define RZ_MTU3_TIOR_OC_RETAIN 0
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#define RZ_MTU3_TIOR_OC_INIT_OUT_LO_HI_OUT 2
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#define RZ_MTU3_TIOR_OC_INIT_OUT_HI_TOGGLE_OUT 7
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#define RZ_MTU3_TIOR_OC_IOA_H_COMP_MATCH \
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FIELD_PREP(RZ_MTU3_TIOR_IOA, RZ_MTU3_TIOR_OC_INIT_OUT_LO_HI_OUT)
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#define RZ_MTU3_TIOR_OC_IOB_TOGGLE \
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FIELD_PREP(RZ_MTU3_TIOR_IOB, RZ_MTU3_TIOR_OC_INIT_OUT_HI_TOGGLE_OUT)
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enum rz_mtu3_channels {
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RZ_MTU3_CHAN_0,
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RZ_MTU3_CHAN_1,
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RZ_MTU3_CHAN_2,
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RZ_MTU3_CHAN_3,
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RZ_MTU3_CHAN_4,
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RZ_MTU3_CHAN_5,
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RZ_MTU3_CHAN_6,
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RZ_MTU3_CHAN_7,
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RZ_MTU3_CHAN_8,
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RZ_MTU_NUM_CHANNELS
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};
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/**
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* struct rz_mtu3_channel - MTU3 channel private data
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*
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* @dev: device handle
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* @channel_number: channel number
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* @lock: Lock to protect channel state
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* @is_busy: channel state
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*/
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struct rz_mtu3_channel {
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struct device *dev;
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unsigned int channel_number;
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struct mutex lock;
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bool is_busy;
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};
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/**
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* struct rz_mtu3 - MTU3 core private data
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*
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* @clk: MTU3 module clock
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* @rz_mtu3_channel: HW channels
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* @priv_data: MTU3 core driver private data
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*/
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struct rz_mtu3 {
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struct clk *clk;
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struct rz_mtu3_channel channels[RZ_MTU_NUM_CHANNELS];
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void *priv_data;
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};
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static inline bool rz_mtu3_request_channel(struct rz_mtu3_channel *ch)
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{
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mutex_lock(&ch->lock);
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if (ch->is_busy) {
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mutex_unlock(&ch->lock);
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return false;
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}
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ch->is_busy = true;
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mutex_unlock(&ch->lock);
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return true;
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}
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static inline void rz_mtu3_release_channel(struct rz_mtu3_channel *ch)
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{
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mutex_lock(&ch->lock);
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ch->is_busy = false;
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mutex_unlock(&ch->lock);
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}
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bool rz_mtu3_is_enabled(struct rz_mtu3_channel *ch);
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void rz_mtu3_disable(struct rz_mtu3_channel *ch);
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int rz_mtu3_enable(struct rz_mtu3_channel *ch);
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u8 rz_mtu3_8bit_ch_read(struct rz_mtu3_channel *ch, u16 off);
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u16 rz_mtu3_16bit_ch_read(struct rz_mtu3_channel *ch, u16 off);
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u32 rz_mtu3_32bit_ch_read(struct rz_mtu3_channel *ch, u16 off);
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u16 rz_mtu3_shared_reg_read(struct rz_mtu3_channel *ch, u16 off);
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void rz_mtu3_8bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u8 val);
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void rz_mtu3_16bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u16 val);
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void rz_mtu3_32bit_ch_write(struct rz_mtu3_channel *ch, u16 off, u32 val);
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void rz_mtu3_shared_reg_write(struct rz_mtu3_channel *ch, u16 off, u16 val);
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void rz_mtu3_shared_reg_update_bit(struct rz_mtu3_channel *ch, u16 off,
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u16 pos, u8 val);
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#endif /* __MFD_RZ_MTU3_H__ */
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