475 lines
13 KiB
C
475 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#ifndef __I2C_MTK_H__
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#define __I2C_MTK_H__
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/sched/clock.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/wait.h>
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#include <linux/mm.h>
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#include <linux/dma-mapping.h>
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#include <linux/scatterlist.h>
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#include <linux/io.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/clk.h>
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#define I2C_DEBUG_FS
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#define I3C_EN (0x01 << 15)
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#define I3C_UNLOCK_HFIFO (0x01 << 15)
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#define I3C_NINTH_BIT (0x02 << 8)
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#define MASTER_CODE 0x08
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#define I2C_HFIFO_ADDR_CLR 0x2
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#define I2C_HS_HOLD_SEL (0x01 << 15)
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#define I2C_HS_HOLD_TIME (0x01 << 2)
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#define I2C_BUS_ERR (0x01 << 8)
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#define I2C_IBI (0x01 << 7)
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#define I2C_DMAERR (0x01 << 6)
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#define I2C_TIMEOUT (0x01 << 5)
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#define I2C_RS_MULTI (0x01 << 4)
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#define I2C_ARB_LOST (0x01 << 3)
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#define I2C_HS_NACKERR (0x01 << 2)
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#define I2C_ACKERR (0x01 << 1)
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#define I2C_TRANSAC_COMP (0x01 << 0)
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#define I2C_INTR_ALL (I2C_BUS_ERR | I2C_IBI | I2C_DMAERR | \
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I2C_TIMEOUT | I2C_RS_MULTI | \
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I2C_ARB_LOST | I2C_HS_NACKERR | \
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I2C_ACKERR | I2C_TRANSAC_COMP)
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#define I2C_TRANSAC_START (0x01 << 0)
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#define I2C_RESUME_ARBIT (0x01 << 1)
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#define I2C_TIMING_STEP_DIV_MASK (0x3f << 0)
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#define I2C_TIMING_SAMPLE_COUNT_MASK (0x7 << 0)
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#define I2C_TIMING_SAMPLE_DIV_MASK (0x7 << 8)
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#define I2C_TIMING_DATA_READ_MASK (0x7 << 12)
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#define I2C_DCM_DISABLE 0x0000
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#define I2C_DCM_ENABLE 0x0007
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#define I2C_IO_CONFIG_OPEN_DRAIN 0x0003
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#define I2C_IO_CONFIG_PUSH_PULL 0x0000
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#define I2C_IO_CONFIG_OPEN_DRAIN_AED 0x0000
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#define I2C_IO_CONFIG_PUSH_PULL_AED 0x0000
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#define I2C_IO_CONFIG_AED_MASK (0xfff << 4)
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#define I2C_SOFT_RST 0x0001
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#define I2C_FIFO_ADDR_CLR 0x0001
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#define I2C_FIFO_ADDR_CLR_MCH 0x0004
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#define I2C_DELAY_LEN 0x000A/* not use 0x02 */
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#define I2C_ST_START_CON 0x8001
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#define I2C_FS_START_CON 0x1800
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#define I2C_FS_PLUS_START_CON 0xa0f
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#define I2C_TIME_CLR_VALUE 0x0000
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#define I2C_TIME_DEFAULT_VALUE 0x0001
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#define I2C_HS_SPEED 0x0080
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#define I2C_TIMEOUT_EN 0x0001
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#define I2C_ROLLBACK 0x0001
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#define I2C_SHADOW_REG_MODE 0x0002
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#define I2C_HS_NACK_DET_EN (0x1 << 1)
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#define I2C_DMA_CON_TX 0x0000
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#define I2C_DMA_CON_RX 0x0001
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#define I2C_DMA_START_EN 0x0001
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#define I2C_DMA_INT_FLAG_NONE 0x0000
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#define I2C_DMA_CLR_FLAG 0x0000
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#define I2C_DMA_WARM_RST 0x0001
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#define I2C_DMA_HARD_RST 0x0002
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#define I2C_DMA_4G_MODE 0x0001
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#define I2C_DMA_DIR_CHANGE (0x1 << 9)
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#define I2C_DMA_SKIP_CONFIG (0x1 << 4)
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#define I2C_DMA_ASYNC_MODE (0x1 << 2)
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#define DMA_SIDE_BAND_RST (0x1 << 2)
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#define I2C_DEFAUT_SPEED 100000/* hz */
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#define MAX_FS_MODE_SPEED 400000/* hz */
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#define MAX_FS_PLUS_MODE_SPEED 1000000/* hz */
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#define MAX_HS_MODE_SPEED 3400000/* hz */
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#define MAX_DMA_TRANS_SIZE 4096/* 255 */
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#define MAX_CLOCK_DIV 8
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#define MAX_SAMPLE_CNT_DIV 8
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#define MAX_STEP_CNT_DIV 64
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#define MAX_HS_STEP_CNT_DIV 8
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#define HALF_DUTY_CYCLE 50
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#define DUTY_CYCLE 45
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#define I2C_CONTROL_RS (0x1 << 1)
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#define I2C_CONTROL_DMA_EN (0x1 << 2)
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#define I2C_CONTROL_CLK_EXT_EN (0x1 << 3)
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#define I2C_CONTROL_DIR_CHANGE (0x1 << 4)
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#define I2C_CONTROL_ACKERR_DET_EN (0x1 << 5)
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#define I2C_CONTROL_TRANSFER_LEN_CHANGE (0x1 << 6)
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#define I2C_CONTROL_IRQ_SEL (0x1 << 7)
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#define I2C_CONTROL_DMAACK_EN (0x1 << 8)
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#define I2C_CONTROL_ASYNC_MODE (0x1 << 9)
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#define I2C_CONTROL_WRAPPER (0x1 << 0)
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#define I2C_MCU_INTR_EN 0x1
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#define I2C_CCU_INTR_EN 0x2
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#define I2C_SIDE_BAND_RST (0x1 << 5)
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#define I2C_RECORD_LEN 10
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#define I2C_MAX_CHANNEL 12
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#define MAX_SCL_LOW_TIME 2/* unit: milli-second */
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#define LSAMPLE_MSK 0x1C0
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#define LSTEP_MSK 0x3F
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#define I2C_DRV_NAME "mt-i2c"
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#define I2CTAG "[I2C]"
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enum {
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DMA_HW_VERSION0 = 0,
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DMA_HW_VERSION1 = 1,
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MDA_SUPPORT_8G = 2,
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DMA_SUPPORT_64G = 3,
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FIFO_SUPPORT_WIDTH_8BIT = 0, /* 0 : FIFO width 8bit supprot */
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FIFO_SUPPORT_WIDTH_64BIT = 1, /* 1 : FIFO width 64bit support */
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I2C_DMA_HANDSHAKE_RST = 2,
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};
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enum DMA_REGS_OFFSET {
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OFFSET_INT_FLAG = 0x0,
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OFFSET_INT_EN = 0x04,
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OFFSET_EN = 0x08,
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OFFSET_RST = 0x0C,
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OFFSET_STOP = 0x10,
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OFFSET_FLUSH = 0x14,
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OFFSET_CON = 0x18,
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OFFSET_TX_MEM_ADDR = 0x1C,
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OFFSET_RX_MEM_ADDR = 0x20,
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OFFSET_TX_LEN = 0x24,
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OFFSET_RX_LEN = 0x28,
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OFFSET_INT_BUF_SIZE = 0x38,
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OFFSET_DEBUG_STA = 0x50,
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OFFSET_TX_MEM_ADDR2 = 0x54,
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OFFSET_RX_MEM_ADDR2 = 0x58,
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OFFSET_USR_DEF_ADDR = 0x5C,
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OFFSET_USR_DEF_CTRL = 0x60,
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};
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struct i2c_dma_info {
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unsigned long base;
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unsigned int int_flag;
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unsigned int int_en;
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unsigned int en;
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unsigned int rst;
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unsigned int stop;
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unsigned int flush;
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unsigned int con;
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unsigned int tx_mem_addr;
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unsigned int rx_mem_addr;
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unsigned int tx_len;
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unsigned int rx_len;
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unsigned int int_buf_size;
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unsigned int debug_sta;
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unsigned int tx_mem_addr2;
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unsigned int rx_mem_addr2;
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unsigned int usr_def_addr;
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unsigned int use_def_addr;
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};
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enum i2c_trans_st_rs {
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I2C_TRANS_STOP = 0,
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I2C_TRANS_REPEATED_START,
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};
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enum {
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FS_MODE,
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HS_MODE,
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};
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enum mt_trans_op {
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I2C_MASTER_WR = 1,
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I2C_MASTER_RD,
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I2C_MASTER_WRRD,
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I2C_MASTER_MULTI_WR,
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};
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enum I2C_REGS_OFFSET {
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OFFSET_DATA_PORT = 0x0,
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OFFSET_SLAVE_ADDR = 0x04,/* only support for FIFO width 8bit */
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OFFSET_INTR_MASK = 0x08,
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OFFSET_INTR_STAT = 0x0c,
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OFFSET_CONTROL = 0x10,
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OFFSET_TRANSFER_LEN = 0x14,
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OFFSET_TRANSAC_LEN = 0x18,
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OFFSET_DELAY_LEN = 0x1c,
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OFFSET_TIMING = 0x20,
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OFFSET_START = 0x24,
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OFFSET_EXT_CONF = 0x28,
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OFFSET_LTIMING = 0x2c,
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OFFSET_FIFO_STAT = 0x30,
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OFFSET_FIFO_THRESH = 0x34,
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OFFSET_FIFO_ADDR_CLR = 0x38,
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OFFSET_IO_CONFIG = 0x40,
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OFFSET_RSV_DEBUG = 0x44,
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OFFSET_HS = 0x48,
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OFFSET_SOFTRESET = 0x50,
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OFFSET_DCM_EN = 0x54,
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OFFSET_PATH_DIR = 0x60,
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OFFSET_DEBUGSTAT = 0x64,
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OFFSET_DEBUGCTRL = 0x68,
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OFFSET_TRANSFER_LEN_AUX = 0x6c,
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OFFSET_CLOCK_DIV = 0x70,
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/* v2 add */
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OFFSET_SLAVE_ADDR1 = 0x94,/* only support for FIFO width 64bit */
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OFFSET_HW_TIMEOUT = 0xfff,
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OFFSET_MCU_INTR = 0xfff,
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OFFSET_TRAFFIC = 0xfff,
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OFFSET_COMMAND = 0xfff,
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OFFSET_CRC_CODE_ = 0xfff,
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OFFSET_TERNARY = 0xfff,
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OFFSET_IBI_TIMING = 0xfff,
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OFFSET_SHAPE = 0xfff,
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OFFSET_HFIFO_DATA = 0xfff,
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OFFSET_ERROR = 0xfff,
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OFFSET_DELAY_STEP = 0xfff,
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OFFSET_DELAY_SAMPLE = 0xfff,
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OFFSET_DMA_INFO = 0xfff,
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OFFSET_IRQ_INFO = 0xfff,
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OFFSET_DMA_FSM_DEBUG = 0xfff,
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OFFSET_HFIFO_STAT = 0xfff,
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OFFSET_MULTI_DMA = 0xfff,
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OFFSET_ROLLBACK = 0xfff,
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};
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enum I2C_REGS_OFFSET_V2 {
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V2_OFFSET_DATA_PORT = 0x0,
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V2_OFFSET_SLAVE_ADDR = 0x04,
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V2_OFFSET_SLAVE_ADDR1 = 0x94,
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V2_OFFSET_INTR_MASK = 0x08,
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V2_OFFSET_INTR_STAT = 0x0c,
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V2_OFFSET_CONTROL = 0x10,
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V2_OFFSET_TRANSFER_LEN = 0x14,
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V2_OFFSET_TRANSAC_LEN = 0x18,
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V2_OFFSET_DELAY_LEN = 0x1c,
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V2_OFFSET_TIMING = 0x20,
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V2_OFFSET_START = 0x24,
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V2_OFFSET_EXT_CONF = 0x28,
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V2_OFFSET_LTIMING = 0x2c,
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V2_OFFSET_FIFO_ADDR_CLR = 0x38,
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V2_OFFSET_SOFTRESET = 0x50,
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/* v2 use different offset */
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V2_OFFSET_HS = 0x30,
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V2_OFFSET_IO_CONFIG = 0x34,
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V2_OFFSET_TRANSFER_LEN_AUX = 0x44,
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V2_OFFSET_CLOCK_DIV = 0x48,
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V2_OFFSET_HW_TIMEOUT = 0x4c,
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V2_OFFSET_DEBUGSTAT = 0xe4,
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V2_OFFSET_DEBUGCTRL = 0xe8,
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V2_OFFSET_FIFO_STAT = 0xf4,
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V2_OFFSET_FIFO_THRESH = 0xf8,
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V2_OFFSET_AED_PATCH = 0x80,
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/* v2 add */
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V2_OFFSET_MCU_INTR = 0x40,
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V2_OFFSET_TRAFFIC = 0x54,
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V2_OFFSET_COMMAND = 0x58,
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V2_OFFSET_CRC_CODE_ = 0x5c,
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V2_OFFSET_TERNARY = 0x60,
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V2_OFFSET_IBI_TIMING = 0x64,
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V2_OFFSET_SHAPE = 0x6c,
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V2_OFFSET_HFIFO_DATA = 0x70,
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V2_OFFSET_ERROR = 0x84,
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V2_OFFSET_DELAY_STEP = 0xd4,
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V2_OFFSET_DELAY_SAMPLE = 0xd8,
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V2_OFFSET_DMA_INFO = 0xdc,
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V2_OFFSET_IRQ_INFO = 0xe0,
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V2_OFFSET_DMA_FSM_DEBUG = 0xec,
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V2_OFFSET_HFIFO_STAT = 0xfc,
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V2_OFFSET_MULTI_DMA = 0xf8c,
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V2_OFFSET_ROLLBACK = 0xf98,
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/* not in v2 */
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V2_OFFSET_DCM_EN = 0xfff,/*0x54*/
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V2_OFFSET_PATH_DIR = 0xfff,/*0x60*/
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};
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struct i2c_info {
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unsigned int slave_addr;
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unsigned int intr_stat;
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unsigned int control;
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unsigned int fifo_stat;
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unsigned int debug_stat;
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unsigned int tmo;
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unsigned long long end_time;
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};
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enum PERICFG_OFFSET {
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OFFSET_PERI_I2C_MODE_ENABLE = 0x0410,
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};
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struct mt_i2c_data {
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unsigned int clk_frequency; /* bus speed in Hz */
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unsigned int flags;
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unsigned int clk_src_div;
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};
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struct i2c_dma_buf {
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u8 *vaddr;
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dma_addr_t paddr;
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};
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struct mt_i2c_ext {
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#define I2C_A_FILTER_MSG 0x00000001
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bool isEnable;
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bool isFilterMsg;
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bool is_ch_offset;
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u32 timing;
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u16 ch_offset;
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u16 ch_offset_dma;
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};
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struct mtk_i2c_compatible {
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unsigned char dma_support;
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/* 0 : original; 1: 4gb support 2: 33bit support; 3: 36 bit support */
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unsigned char fifo_support;
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/* 0 : FIFO width 8bit supprot; 1 : FIFO width 64bit support */
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unsigned char i2c_dma_handshake_rst;
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/* 0 : no need side-band reset; 1 : need side-band reset */
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unsigned char idvfs_i2c;
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/* compatible before chip, set 1 if no TRANSFER_LEN_AUX */
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unsigned char set_dt_div;/* use dt to set div */
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unsigned char check_max_freq;/* check max freq */
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unsigned char set_ltiming;/* need to set LTIMING */
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unsigned char set_aed;/* need to set AED */
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unsigned char ver;/* controller version */
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unsigned char dma_ver;/* dma controller version */
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/* for constraint of SAMPLE_CNT_DIV and STEP_CNT_DIV of mt6765 */
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/* 1, has-a-constraint; 0, no constraint */
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unsigned char cnt_constraint;
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/* only for MT6768 */
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/* this option control defined when nack error or ack error occurs */
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/* 0 : disable, 1 : enable*/
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unsigned char control_irq_sel;
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u16 ext_time_config;
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char clk_compatible[128];
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u16 clk_sta_offset[I2C_MAX_CHANNEL];/* I2C clock status register */
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u8 cg_bit[I2C_MAX_CHANNEL];/* i2c clock bit */
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u32 clk_sel_offset;
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u32 arbit_offset;
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};
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struct mtk_i2c_pll {
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struct clk *clk_mux;/* clock top i2c sel for i2c bus */
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struct clk *clk_p_main;/* clock top i2c pll main for i2c bus */
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struct clk *clk_p_univ;/* clock top i2c pll univ for i2c bus */
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};
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struct mt_i2c {
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struct i2c_adapter adap;/* i2c host adapter */
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struct device *dev;
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wait_queue_head_t wait;/* i2c transfer wait queue */
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/* set in i2c probe */
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void __iomem *base;/* i2c base addr */
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void __iomem *pdmabase;/* dma base address*/
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void __iomem *gpiobase;/* gpio base address */
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int irqnr; /* i2c interrupt number */
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int id;
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int scl_gpio_id; /* SCL GPIO number */
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int sda_gpio_id; /* SDA GPIO number */
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unsigned int gpio_start;
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unsigned int mem_len;
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unsigned int offset_eh_cfg;
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unsigned int offset_pu_cfg;
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unsigned int offset_rsel_cfg;
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struct i2c_dma_buf dma_buf;/* memory alloc for DMA mode */
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struct clk *clk_main;/* main clock for i2c bus */
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struct clk *clk_dma;/* DMA clock for i2c via DMA */
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struct clk *clk_pmic;/* PMIC clock for i2c from PMIC */
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struct clk *clk_arb;/* Arbitrator clock for i2c */
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struct clk *clk_pal;
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bool have_pmic;/* can use i2c pins form PMIC */
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bool have_dcm;/* HW DCM function */
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bool use_push_pull;/* IO config push-pull mode */
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bool appm;/* I2C for APPM */
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bool gpupm;/* I2C for GPUPM */
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bool buffermode; /* I2C Buffer mode support */
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bool hs_only; /* I2C HS only */
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bool fifo_only; /* i2c fifo mode only, does not have dma HW support */
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/* set when doing the transfer */
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u16 irq_stat; /* interrupt status */
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u16 i3c_en; /* i3c enalbe */
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unsigned int speed_hz;/* The speed in transfer */
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unsigned int clk_src_div;
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unsigned int aed;/* aed value from dt */
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spinlock_t cg_lock;
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int cg_cnt;
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bool trans_stop;/* i2c transfer stop */
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enum mt_trans_op op;
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u16 total_len;
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u16 msg_len;
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u8 *msg_buf; /* pointer to msg data */
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u16 msg_aux_len;/* WRRD mode to set AUX_LEN register */
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u16 addr;/* 7bit slave address, without read/write bit */
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u16 timing_reg;
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u16 ltiming_reg;
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u16 high_speed_reg;
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u16 clk_sta_offset;
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u8 cg_bit;
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bool is_hw_trig;
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bool is_ccu_trig;
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bool suspended;
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int rec_idx;/* next record idx */
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u32 ch_offset_default;
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u32 ch_offset;
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u32 ch_offset_dma_default;
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u32 ch_offset_dma;
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bool skip_scp_sema;
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bool has_ccu;
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u32 apdma_size;
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u32 ccu_offset;
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unsigned long main_clk;
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struct mutex i2c_mutex;
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struct mt_i2c_ext ext_data;
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const struct mtk_i2c_compatible *dev_comp;
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struct mtk_i2c_pll *i2c_pll_info;
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struct i2c_info rec_info[I2C_RECORD_LEN];
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};
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#if defined(CONFIG_MTK_FPGA) || defined(CONFIG_FPGA_EARLY_PORTING)
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#define CONFIG_MT_I2C_FPGA_ENABLE
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#endif
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#if (defined(CONFIG_MT_I2C_FPGA_ENABLE))
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#define FPGA_CLOCK 12000/* FPGA crystal frequency (KHz) */
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#define I2C_CLK_DIV (5)/* frequency divider */
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#define I2C_CLK_RATE ((FPGA_CLOCK / I2C_CLK_DIV) * 1000)
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/* Hz for FPGA I2C work frequency */
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#endif
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extern void gpio_dump_regs_range(int start, int end);
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extern void i2c_dump_info(struct mt_i2c *i2c);
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#if defined(CONFIG_MTK_GIC_EXT)
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extern void mt_irq_dump_status(unsigned int irq);
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#endif
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extern unsigned int enable_4G(void);
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extern int mtk_i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
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int num, u32 ext_flag, u32 timing);
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extern void mt_irq_dump_status(unsigned int irq);
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extern int hw_trig_i2c_enable(struct i2c_adapter *adap);
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extern int hw_trig_i2c_disable(struct i2c_adapter *adap);
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extern int hw_trig_i2c_transfer(struct i2c_adapter *adap,
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struct i2c_msg *msgs, int num);
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extern int i2c_ccu_enable(struct i2c_adapter *adap, u16 ch_offset);
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extern int i2c_ccu_disable(struct i2c_adapter *adap);
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#endif
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