i2c-ite.h
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上传日期:2013-04-10
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- /*
- --------------------------------------------------------------------
- i2c-ite.h: Global defines for the I2C controller on board the
- ITE MIPS processor.
- --------------------------------------------------------------------
- Hai-Pao Fan, MontaVista Software, Inc.
- hpfan@mvista.com or source@mvista.com
- Copyright 2001 MontaVista Software Inc.
- * 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 PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifndef I2C_ITE_H
- #define I2C_ITE_H 1
- #include <asm/it8172/it8172.h>
- /* I2C Registers */
- #define ITE_I2CHCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x30
- #define ITE_I2CHSR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x34
- #define ITE_I2CSAR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x38
- #define ITE_I2CSSAR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x3c
- #define ITE_I2CCKCNT IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x48
- #define ITE_I2CSHDR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x4c
- #define ITE_I2CRSUR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x50
- #define ITE_I2CPSUR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x54
- #define ITE_I2CFDR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x70
- #define ITE_I2CFBCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x74
- #define ITE_I2CFCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x78
- #define ITE_I2CFSR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x7c
- /* Host Control Register ITE_I2CHCR */
- #define ITE_I2CHCR_HCE 0x01 /* Enable I2C Host Controller */
- #define ITE_I2CHCR_IE 0x02 /* Enable the interrupt after completing
- the current transaction */
- #define ITE_I2CHCR_CP_W 0x00 /* bit2-4 000 - Write */
- #define ITE_I2CHCR_CP_R 0x08 /* 010 - Current address read */
- #define ITE_I2CHCR_CP_S 0x10 /* 100 - Sequential read */
- #define ITE_I2CHCR_ST 0x20 /* Initiates the I2C host controller to execute
- the command and send the data programmed in
- all required registers to I2C bus */
- #define ITE_CMD ITE_I2CHCR_HCE | ITE_I2CHCR_IE | ITE_I2CHCR_ST
- #define ITE_WRITE ITE_CMD | ITE_I2CHCR_CP_W
- #define ITE_READ ITE_CMD | ITE_I2CHCR_CP_R
- #define ITE_SREAD ITE_CMD | ITE_I2CHCR_CP_S
- /* Host Status Register ITE_I2CHSR */
- #define ITE_I2CHSR_DB 0x01 /* Device is busy, receives NACK response except
- in the first and last bytes */
- #define ITE_I2CHSR_DNE 0x02 /* Target address on I2C bus does not exist */
- #define ITE_I2CHSR_TDI 0x04 /* R/W Transaction on I2C bus was completed */
- #define ITE_I2CHSR_HB 0x08 /* Host controller is processing transactions */
- #define ITE_I2CHSR_FER 0x10 /* Error occurs in the FIFO */
- /* Slave Address Register ITE_I2CSAR */
- #define ITE_I2CSAR_SA_MASK 0xfe /* Target I2C device address */
- #define ITE_I2CSAR_ASO 0x0100 /* Output 1/0 to I2CAS port when the
- next slave address is addressed */
- /* Slave Sub-address Register ITE_I2CSSAR */
- #define ITE_I2CSSAR_SUBA_MASK 0xff /* Target I2C device sub-address */
- /* Clock Counter Register ITE_I2CCKCNT */
- #define ITE_I2CCKCNT_STOP 0x00 /* stop I2C clock */
- #define ITE_I2CCKCNT_HPCC_MASK 0x7f /* SCL high period counter */
- #define ITE_I2CCKCNT_LPCC_MASK 0x7f00 /* SCL low period counter */
- /* START Hold Time Register ITE_I2CSHDR */
- /* value is counted based on 16 MHz internal clock */
- #define ITE_I2CSHDR_FM 0x0a /* START condition at fast mode */
- #define ITE_I2CSHDR_SM 0x47 /* START contition at standard mode */
- /* (Repeated) START Setup Time Register ITE_I2CRSUR */
- /* value is counted based on 16 MHz internal clock */
- #define ITE_I2CRSUR_FM 0x0a /* repeated START condition at fast mode */
- #define ITE_I2CRSUR_SM 0x50 /* repeated START condition at standard mode */
- /* STOP setup Time Register ITE_I2CPSUR */
- /* FIFO Data Register ITE_I2CFDR */
- #define ITE_I2CFDR_MASK 0xff
- /* FIFO Byte Count Register ITE_I2CFBCR */
- #define ITE_I2CFBCR_MASK 0x3f
- /* FIFO Control Register ITE_I2CFCR */
- #define ITE_I2CFCR_FLUSH 0x01 /* Flush FIFO and reset the FIFO point
- and I2CFSR */
- /* FIFO Status Register ITE_I2CFSR */
- #define ITE_I2CFSR_FO 0x01 /* FIFO is overrun when write */
- #define ITE_I2CFSR_FU 0x02 /* FIFO is underrun when read */
- #define ITE_I2CFSR_FF 0x04 /* FIFO is full when write */
- #define ITE_I2CFSR_FE 0x08 /* FIFO is empty when read */
- #endif /* I2C_ITE_H */