uboot-vybrid_public/include/asm-arm/arch-omap24xx/i2c.h

/*
 * (C) Copyright 2004
 * Texas Instruments, <www.ti.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#ifndef _OMAP24XX_I2C_H_
#define _OMAP24XX_I2C_H_

#define I2C_BASE                0x48070000
#define I2C_BASE2               0x48072000 /* nothing hooked up on h4 */

#define I2C_REV                 (I2C_BASE + 0x00)
#define I2C_IE                  (I2C_BASE + 0x04)
#define I2C_STAT                (I2C_BASE + 0x08)
#define I2C_IV                  (I2C_BASE + 0x0c)
#define I2C_BUF                 (I2C_BASE + 0x14)
#define I2C_CNT                 (I2C_BASE + 0x18)
#define I2C_DATA                (I2C_BASE + 0x1c)
#define I2C_SYSC                (I2C_BASE + 0x20)
#define I2C_CON                 (I2C_BASE + 0x24)
#define I2C_OA                  (I2C_BASE + 0x28)
#define I2C_SA                  (I2C_BASE + 0x2c)
#define I2C_PSC                 (I2C_BASE + 0x30)
#define I2C_SCLL                (I2C_BASE + 0x34)
#define I2C_SCLH                (I2C_BASE + 0x38)
#define I2C_SYSTEST             (I2C_BASE + 0x3c)

/* I2C masks */

/* I2C Interrupt Enable Register (I2C_IE): */
#define I2C_IE_GC_IE    (1 << 5)
#define I2C_IE_XRDY_IE  (1 << 4)        /* Transmit data ready interrupt enable */
#define I2C_IE_RRDY_IE  (1 << 3)        /* Receive data ready interrupt enable */
#define I2C_IE_ARDY_IE  (1 << 2)        /* Register access ready interrupt enable */
#define I2C_IE_NACK_IE  (1 << 1)        /* No acknowledgment interrupt enable */
#define I2C_IE_AL_IE    (1 << 0)        /* Arbitration lost interrupt enable */

/* I2C Status Register (I2C_STAT): */

#define I2C_STAT_SBD    (1 << 15)       /* Single byte data */
#define I2C_STAT_BB     (1 << 12)       /* Bus busy */
#define I2C_STAT_ROVR   (1 << 11)       /* Receive overrun */
#define I2C_STAT_XUDF   (1 << 10)       /* Transmit underflow */
#define I2C_STAT_AAS    (1 << 9)        /* Address as slave */
#define I2C_STAT_GC     (1 << 5)
#define I2C_STAT_XRDY   (1 << 4)        /* Transmit data ready */
#define I2C_STAT_RRDY   (1 << 3)        /* Receive data ready */
#define I2C_STAT_ARDY   (1 << 2)        /* Register access ready */
#define I2C_STAT_NACK   (1 << 1)        /* No acknowledgment interrupt enable */
#define I2C_STAT_AL     (1 << 0)        /* Arbitration lost interrupt enable */


/* I2C Interrupt Code Register (I2C_INTCODE): */

#define I2C_INTCODE_MASK        7
#define I2C_INTCODE_NONE        0
#define I2C_INTCODE_AL          1       /* Arbitration lost */
#define I2C_INTCODE_NAK         2       /* No acknowledgement/general call */
#define I2C_INTCODE_ARDY        3       /* Register access ready */
#define I2C_INTCODE_RRDY        4       /* Rcv data ready */
#define I2C_INTCODE_XRDY        5       /* Xmit data ready */

/* I2C Buffer Configuration Register (I2C_BUF): */

#define I2C_BUF_RDMA_EN         (1 << 15)       /* Receive DMA channel enable */
#define I2C_BUF_XDMA_EN         (1 << 7)        /* Transmit DMA channel enable */

/* I2C Configuration Register (I2C_CON): */

#define I2C_CON_EN      (1 << 15)       /* I2C module enable */
#define I2C_CON_BE      (1 << 14)       /* Big endian mode */
#define I2C_CON_STB     (1 << 11)       /* Start byte mode (master mode only) */
#define I2C_CON_MST     (1 << 10)       /* Master/slave mode */
#define I2C_CON_TRX     (1 << 9)        /* Transmitter/receiver mode (master mode only) */
#define I2C_CON_XA      (1 << 8)        /* Expand address */
#define I2C_CON_STP     (1 << 1)        /* Stop condition (master mode only) */
#define I2C_CON_STT     (1 << 0)        /* Start condition (master mode only) */

/* I2C System Test Register (I2C_SYSTEST): */

#define I2C_SYSTEST_ST_EN       (1 << 15)       /* System test enable */
#define I2C_SYSTEST_FREE        (1 << 14)       /* Free running mode (on breakpoint) */
#define I2C_SYSTEST_TMODE_MASK  (3 << 12)       /* Test mode select */
#define I2C_SYSTEST_TMODE_SHIFT (12)            /* Test mode select */
#define I2C_SYSTEST_SCL_I       (1 << 3)        /* SCL line sense input value */
#define I2C_SYSTEST_SCL_O       (1 << 2)        /* SCL line drive output value */
#define I2C_SYSTEST_SDA_I       (1 << 1)        /* SDA line sense input value */
#define I2C_SYSTEST_SDA_O       (1 << 0)        /* SDA line drive output value */

/* These values were copied from omap3, include/asm-arm/arch-omap3/i2c.h. */
#define OMAP_I2C_STANDARD		100000
#define OMAP_I2C_FAST_MODE		400000
#define OMAP_I2C_HIGH_SPEED		3400000

#define SYSTEM_CLOCK_12			12000000
#define SYSTEM_CLOCK_13			13000000
#define SYSTEM_CLOCK_192		19200000
#define SYSTEM_CLOCK_96			96000000

#ifndef I2C_IP_CLK
#define I2C_IP_CLK			SYSTEM_CLOCK_96
#endif

#ifndef I2C_INTERNAL_SAMPLING_CLK
#define I2C_INTERNAL_SAMPLING_CLK	19200000
#endif

/* These are the trim values for standard and fast speed */
#ifndef I2C_FASTSPEED_SCLL_TRIM
#define I2C_FASTSPEED_SCLL_TRIM		6
#endif
#ifndef I2C_FASTSPEED_SCLH_TRIM
#define I2C_FASTSPEED_SCLH_TRIM		6
#endif

/* These are the trim values for high speed */
#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM
#define I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM	I2C_FASTSPEED_SCLL_TRIM
#endif
#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM
#define I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM	I2C_FASTSPEED_SCLH_TRIM
#endif
#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM
#define I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM	I2C_FASTSPEED_SCLL_TRIM
#endif
#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM
#define I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM	I2C_FASTSPEED_SCLH_TRIM
#endif

#define I2C_PSC_MAX			0x0f
#define I2C_PSC_MIN			0x00


#endif