/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2011 by Amaury Pouly * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #ifndef __I2C_IMX233_H__ #define __I2C_IMX233_H__ #include "cpu.h" #include "system.h" #include "system-target.h" #include "i2c.h" #define HW_I2C_BASE 0x80058000 #define HW_I2C_CTRL0 (*(volatile uint32_t *)(HW_I2C_BASE + 0x0)) #define HW_I2C_CTRL0__XFER_COUNT_BM 0xffff #define HW_I2C_CTRL0__TRANSMIT (1 << 16) #define HW_I2C_CTRL0__MASTER_MODE (1 << 17) #define HW_I2C_CTRL0__SLAVE_ADDRESS_ENABLE (1 << 18) #define HW_I2C_CTRL0__PRE_SEND_START (1 << 19) #define HW_I2C_CTRL0__POST_SEND_STOP (1 << 20) #define HW_I2C_CTRL0__RETAIN_CLOCK (1 << 21) #define HW_I2C_CTRL0__CLOCK_HELD (1 << 22) #define HW_I2C_CTRL0__PIO_MODE (1 << 24) #define HW_I2C_CTRL0__SEND_NAK_ON_LAST (1 << 25) #define HW_I2C_CTRL0__ACKNOWLEDGE (1 << 26) #define HW_I2C_CTRL0__RUN (1 << 29) #define HW_I2C_TIMING0 (*(volatile uint32_t *)(HW_I2C_BASE + 0x10)) #define HW_I2C_TIMING0__RECV_COUNT_BM 0x3ff #define HW_I2C_TIMING0__HIGH_COUNT_BM (0x3ff << 16) #define HW_I2C_TIMING0__HIGH_COUNT_BP 16 #define HW_I2C_TIMING1 (*(volatile uint32_t *)(HW_I2C_BASE + 0x20)) #define HW_I2C_TIMING1__XMIT_COUNT_BM 0x3ff #define HW_I2C_TIMING1__LOW_COUNT_BM (0x3ff << 16) #define HW_I2C_TIMING1__LOW_COUNT_BP 16 #define HW_I2C_TIMING2 (*(volatile uint32_t *)(HW_I2C_BASE + 0x30)) #define HW_I2C_TIMING2__LEADIN_COUNT_BM 0x3ff #define HW_I2C_TIMING2__BUS_FREE_BM (0x3ff << 16) #define HW_I2C_TIMING2__BUS_FREE_BP 16 #define HW_I2C_CTRL1 (*(volatile uint32_t *)(HW_I2C_BASE + 0x40)) #define HW_I2C_CTRL1__SLAVE_IRQ (1 << 0) #define HW_I2C_CTRL1__SLAVE_STOP_IRQ (1 << 1) #define HW_I2C_CTRL1__MASTER_LOSS_IRQ (1 << 2) #define HW_I2C_CTRL1__EARLY_TERM_IRQ (1 << 3) #define HW_I2C_CTRL1__OVERSIZE_XFER_TERM_IRQ (1 << 4) #define HW_I2C_CTRL1__NO_SLAVE_ACK_IRQ (1 << 5) #define HW_I2C_CTRL1__DATA_ENGINE_COMPLT_IRQ (1 << 6) #define HW_I2C_CTRL1__BUS_FREE_IRQ (1 << 7) #define HW_I2C_CTRL1__SLAVE_IRQ_EN (1 << 8) #define HW_I2C_CTRL1__SLAVE_STOP_IRQ_EN (1 << 9) #define HW_I2C_CTRL1__MASTER_LOSS_IRQ_EN (1 << 10) #define HW_I2C_CTRL1__EARLY_TERM_IRQ_EN (1 << 11) #define HW_I2C_CTRL1__OVERSIZE_XFER_TERM_IRQ_EN (1 << 12) #define HW_I2C_CTRL1__NO_SLAVE_ACK_IRQ_EN (1 << 13) #define HW_I2C_CTRL1__DATA_ENGINE_COMPLT_IRQ_EN (1 << 14) #define HW_I2C_CTRL1__BUS_FREE_IRQ_EN (1 << 15) #define HW_I2C_CTRL1__BCAST_SLAVE_EN (1 << 24) #define HW_I2C_CTRL1__FORCE_CLK_IDLE (1 << 25) #define HW_I2C_CTRL1__FORCE_DATA_IDLE (1 << 26) #define HW_I2C_CTRL1__ACK_MODE (1 << 27) #define HW_I2C_CTRL1__CLR_GOT_A_NAK (1 << 28) #define HW_I2C_CTRL1__ALL_IRQ 0xff #define HW_I2C_CTRL1__ALL_IRQ_EN 0xff00 #define HW_I2C_STAT (*(volatile uint32_t *)(HW_I2C_BASE + 0x50)) #define HW_I2C_STAT__SLAVE_IRQ_SUMMARY (1 << 0) #define HW_I2C_STAT__SLAVE_STOP_IRQ_SUMMARY (1 << 1) #define HW_I2C_STAT__MASTER_LOSS_IRQ_SUMMARY (1 << 2) #define HW_I2C_STAT__EARLY_TERM_IRQ_SUMMARY (1 << 3) #define HW_I2C_STAT__OVERSIZE_XFER_TERM_IRQ_SUMMARY (1 << 4) #define HW_I2C_STAT__NO_SLAVE_ACK_IRQ_SUMMARY (1 << 5) #define HW_I2C_STAT__DATA_ENGINE_COMPLT_IRQ_SUMMARY (1 << 6) #define HW_I2C_STAT__BUS_FREE_IRQ_SUMMARY (1 << 7) #define HW_I2C_STAT__SLAVE_BUSY (1 << 8) #define HW_I2C_STAT__DATA_ENGINE_BUSY (1 << 9) #define HW_I2C_STAT__CLK_GEN_BUSY (1 << 10) #define HW_I2C_STAT__BUS_BUSY (1 << 11) #define HW_I2C_STAT__DATA_ENGINE_DMA_WAIT (1 << 12) #define HW_I2C_STAT__SLAVE_SEARCHING (1 << 13) #define HW_I2C_STAT__SLAVE_FOUND (1 << 14) #define HW_I2C_STAT__SLAVE_ADDR_EQ_ZERO (1 << 15) #define HW_I2C_STAT__RCVD_SLAVE_ADDR_BM (0xff << 16) #define HW_I2C_STAT__RCVD_SLAVE_ADDR_BP 16 #define HW_I2C_STAT__GOT_A_NAK (1 << 28) #define HW_I2C_STAT__ANY_ENABLED_IRQ (1 << 29) #define HW_I2C_STAT__MASTER_PRESENT (1 << 31) #define HW_I2C_DATA (*(volatile uint32_t *)(HW_I2C_BASE + 0x60)) #define HW_I2C_DEBUG0 (*(volatile uint32_t *)(HW_I2C_BASE + 0x70)) #define HW_I2C_DEBUG1 (*(volatile uint32_t *)(HW_I2C_BASE + 0x80)) #define HW_I2C_VERSION (*(volatile uint32_t *)(HW_I2C_BASE + 0x90)) enum imx233_i2c_error_t { I2C_SUCCESS = 0, I2C_ERROR = -1, I2C_TIMEOUT = -2, I2C_MASTER_LOSS = -3, I2C_NO_SLAVE_ACK = -4, I2C_SLAVE_NAK = -5, I2C_BUFFER_FULL = -6, }; void imx233_i2c_init(void); /* start building a transfer, will acquire an exclusive lock */ void imx233_i2c_begin(void); /* add stage */ enum imx233_i2c_error_t imx233_i2c_add(bool start, bool transmit, void *buffer, unsigned size, bool stop); /* end building a transfer and start the transfer */ enum imx233_i2c_error_t imx233_i2c_end(unsigned timeout); #endif // __I2C_IMX233_H__