171 lines
6.5 KiB
C
171 lines
6.5 KiB
C
/*
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* (C) Copyright 2004-2006
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* Texas Instruments, <www.ti.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _OMAP34XX_I2C_H_
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#define _OMAP34XX_I2C_H_
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/* Get the i2c base addresses */
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#include <asm/arch/cpu.h>
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#define I2C_DEFAULT_BASE I2C_BASE1
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#define I2C_REV (0x00)
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#define I2C_IE (0x04)
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#define I2C_STAT (0x08)
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#define I2C_IV (0x0c)
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#define I2C_SYSS (0x10)
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#define I2C_BUF (0x14)
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#define I2C_CNT (0x18)
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#define I2C_DATA (0x1c)
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#define I2C_SYSC (0x20)
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#define I2C_CON (0x24)
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#define I2C_OA (0x28)
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#define I2C_SA (0x2c)
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#define I2C_PSC (0x30)
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#define I2C_SCLL (0x34)
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#define I2C_SCLH (0x38)
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#define I2C_SYSTEST (0x3c)
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/* I2C masks */
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/* I2C Interrupt Enable Register (I2C_IE): */
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#define I2C_IE_GC_IE (1 << 5)
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#define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */
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#define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */
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#define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */
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#define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */
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#define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */
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/* I2C Status Register (I2C_STAT): */
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#define I2C_STAT_SBD (1 << 15) /* Single byte data */
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#define I2C_STAT_BB (1 << 12) /* Bus busy */
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#define I2C_STAT_ROVR (1 << 11) /* Receive overrun */
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#define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */
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#define I2C_STAT_AAS (1 << 9) /* Address as slave */
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#define I2C_STAT_GC (1 << 5)
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#define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */
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#define I2C_STAT_RRDY (1 << 3) /* Receive data ready */
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#define I2C_STAT_ARDY (1 << 2) /* Register access ready */
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#define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */
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#define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */
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/* I2C Interrupt Code Register (I2C_INTCODE): */
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#define I2C_INTCODE_MASK 7
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#define I2C_INTCODE_NONE 0
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#define I2C_INTCODE_AL 1 /* Arbitration lost */
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#define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */
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#define I2C_INTCODE_ARDY 3 /* Register access ready */
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#define I2C_INTCODE_RRDY 4 /* Rcv data ready */
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#define I2C_INTCODE_XRDY 5 /* Xmit data ready */
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/* I2C Buffer Configuration Register (I2C_BUF): */
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#define I2C_BUF_RDMA_EN (1 << 15) /* Receive DMA channel enable */
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#define I2C_BUF_XDMA_EN (1 << 7) /* Transmit DMA channel enable */
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/* I2C Configuration Register (I2C_CON): */
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#define I2C_CON_EN (1 << 15) /* I2C module enable */
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#define I2C_CON_BE (1 << 14) /* Big endian mode */
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#define I2C_CON_STB (1 << 11) /* Start byte mode (master mode only) */
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#define I2C_CON_MST (1 << 10) /* Master/slave mode */
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#define I2C_CON_TRX (1 << 9) /* Transmitter/receiver mode (master mode only) */
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#define I2C_CON_XA (1 << 8) /* Expand address */
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#define I2C_CON_STP (1 << 1) /* Stop condition (master mode only) */
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#define I2C_CON_STT (1 << 0) /* Start condition (master mode only) */
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/* I2C System Test Register (I2C_SYSTEST): */
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#define I2C_SYSTEST_ST_EN (1 << 15) /* System test enable */
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#define I2C_SYSTEST_FREE (1 << 14) /* Free running mode (on breakpoint) */
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#define I2C_SYSTEST_TMODE_MASK (3 << 12) /* Test mode select */
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#define I2C_SYSTEST_TMODE_SHIFT (12) /* Test mode select */
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#define I2C_SYSTEST_SCL_I (1 << 3) /* SCL line sense input value */
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#define I2C_SYSTEST_SCL_O (1 << 2) /* SCL line drive output value */
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#define I2C_SYSTEST_SDA_I (1 << 1) /* SDA line sense input value */
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#define I2C_SYSTEST_SDA_O (1 << 0) /* SDA line drive output value */
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/* I2C System Control Register (I2C_SYSC): */
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#define I2C_SYSC_SRST (1 << 1) /* Software Reset */
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/* I2C System Status Register (I2C_SYSS): */
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#define I2C_SYSS_RDONE (1 << 0) /* Internel reset monitoring */
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#define I2C_SCLL_SCLL (0)
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#define I2C_SCLL_SCLL_M (0xFF)
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#define I2C_SCLL_HSSCLL (8)
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#define I2C_SCLH_HSSCLL_M (0xFF)
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#define I2C_SCLH_SCLH (0)
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#define I2C_SCLH_SCLH_M (0xFF)
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#define I2C_SCLH_HSSCLH (8)
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#define I2C_SCLH_HSSCLH_M (0xFF)
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#define OMAP_I2C_STANDARD 100
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#define OMAP_I2C_FAST_MODE 400
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#define OMAP_I2C_HIGH_SPEED 3400
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#define SYSTEM_CLOCK_12 12000
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#define SYSTEM_CLOCK_13 13000
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#define SYSTEM_CLOCK_192 19200
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#define SYSTEM_CLOCK_96 96000
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#define I2C_IP_CLK SYSTEM_CLOCK_96
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#ifndef I2C_IP_CLK
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#define I2C_IP_CLK SYSTEM_CLOCK_96
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#endif
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/* Boards may want to define I2C_INTERNAL_SAMPLING_CLK */
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/* These are the trim values for standard and fast speed */
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#ifndef I2C_FASTSPEED_SCLL_TRIM
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#define I2C_FASTSPEED_SCLL_TRIM 7
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#endif
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#ifndef I2C_FASTSPEED_SCLH_TRIM
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#define I2C_FASTSPEED_SCLH_TRIM 5
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#endif
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/* These are the trim values for high speed */
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#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM
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#define I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM I2C_FASTSPEED_SCLL_TRIM
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#endif
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#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM
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#define I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM I2C_FASTSPEED_SCLH_TRIM
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#endif
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#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM
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#define I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM I2C_FASTSPEED_SCLL_TRIM
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#endif
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#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM
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#define I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM I2C_FASTSPEED_SCLH_TRIM
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#endif
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#define I2C_PSC_MAX (0x0f)
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#define I2C_PSC_MIN (0x00)
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#endif
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