/* SPDX-License-Identifier: GPL-2.0 */ /* * i2c Support for Atmel's AT91 Two-Wire Interface (TWI) * * Copyright (C) 2011 Weinmann Medical GmbH * Author: Nikolaus Voss <[email protected]> * * Evolved from original work by: * Copyright (C) 2004 Rick Bronson * Converted to 2.6 by Andrew Victor <[email protected]> * * Borrowed heavily from original work by: * Copyright (C) 2000 Philip Edelbrock <[email protected]> */ #include <linux/clk.h> #include <linux/completion.h> #include <linux/dma-mapping.h> #include <linux/dmaengine.h> #include <linux/i2c.h> #include <linux/platform_device.h> #define AT91_I2C_TIMEOUT … #define AT91_I2C_DMA_THRESHOLD … #define AUTOSUSPEND_TIMEOUT … #define AT91_I2C_MAX_ALT_CMD_DATA_SIZE … /* AT91 TWI register definitions */ #define AT91_TWI_CR … #define AT91_TWI_START … #define AT91_TWI_STOP … #define AT91_TWI_MSEN … #define AT91_TWI_MSDIS … #define AT91_TWI_SVEN … #define AT91_TWI_SVDIS … #define AT91_TWI_QUICK … #define AT91_TWI_SWRST … #define AT91_TWI_CLEAR … #define AT91_TWI_ACMEN … #define AT91_TWI_ACMDIS … #define AT91_TWI_THRCLR … #define AT91_TWI_RHRCLR … #define AT91_TWI_LOCKCLR … #define AT91_TWI_FIFOEN … #define AT91_TWI_FIFODIS … #define AT91_TWI_MMR … #define AT91_TWI_IADRSZ_1 … #define AT91_TWI_MREAD … #define AT91_TWI_SMR … #define AT91_TWI_SMR_SADR_MAX … #define AT91_TWI_SMR_SADR(x) … #define AT91_TWI_IADR … #define AT91_TWI_CWGR … #define AT91_TWI_CWGR_HOLD_MAX … #define AT91_TWI_CWGR_HOLD(x) … #define AT91_TWI_SR … #define AT91_TWI_TXCOMP … #define AT91_TWI_RXRDY … #define AT91_TWI_TXRDY … #define AT91_TWI_SVREAD … #define AT91_TWI_SVACC … #define AT91_TWI_OVRE … #define AT91_TWI_UNRE … #define AT91_TWI_NACK … #define AT91_TWI_EOSACC … #define AT91_TWI_LOCK … #define AT91_TWI_SCL … #define AT91_TWI_SDA … #define AT91_TWI_INT_MASK … #define AT91_TWI_IER … #define AT91_TWI_IDR … #define AT91_TWI_IMR … #define AT91_TWI_RHR … #define AT91_TWI_THR … #define AT91_TWI_ACR … #define AT91_TWI_ACR_DATAL_MASK … #define AT91_TWI_ACR_DATAL(len) … #define AT91_TWI_ACR_DIR … #define AT91_TWI_FILTR … #define AT91_TWI_FILTR_FILT … #define AT91_TWI_FILTR_PADFEN … #define AT91_TWI_FILTR_THRES(v) … #define AT91_TWI_FILTR_THRES_MAX … #define AT91_TWI_FILTR_THRES_MASK … #define AT91_TWI_FMR … #define AT91_TWI_FMR_TXRDYM(mode) … #define AT91_TWI_FMR_TXRDYM_MASK … #define AT91_TWI_FMR_RXRDYM(mode) … #define AT91_TWI_FMR_RXRDYM_MASK … #define AT91_TWI_ONE_DATA … #define AT91_TWI_TWO_DATA … #define AT91_TWI_FOUR_DATA … #define AT91_TWI_FLR … #define AT91_TWI_FSR … #define AT91_TWI_FIER … #define AT91_TWI_FIDR … #define AT91_TWI_FIMR … #define AT91_TWI_VER … struct at91_twi_pdata { … }; struct at91_twi_dma { … }; struct at91_twi_dev { … }; unsigned at91_twi_read(struct at91_twi_dev *dev, unsigned reg); void at91_twi_write(struct at91_twi_dev *dev, unsigned reg, unsigned val); void at91_disable_twi_interrupts(struct at91_twi_dev *dev); void at91_twi_irq_save(struct at91_twi_dev *dev); void at91_twi_irq_restore(struct at91_twi_dev *dev); void at91_init_twi_bus(struct at91_twi_dev *dev); void at91_init_twi_bus_master(struct at91_twi_dev *dev); int at91_twi_probe_master(struct platform_device *pdev, u32 phy_addr, struct at91_twi_dev *dev); #ifdef CONFIG_I2C_AT91_SLAVE_EXPERIMENTAL void at91_init_twi_bus_slave(struct at91_twi_dev *dev); int at91_twi_probe_slave(struct platform_device *pdev, u32 phy_addr, struct at91_twi_dev *dev); #else static inline void at91_init_twi_bus_slave(struct at91_twi_dev *dev) {} static inline int at91_twi_probe_slave(struct platform_device *pdev, u32 phy_addr, struct at91_twi_dev *dev) { return -EINVAL; } #endif
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