| /* |
| -------------------------------------------------------------------- |
| 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 */ |