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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 420 | giacomo | 1 | /* |
| 2 | -------------------------------------------------------------------- |
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| 3 | i2c-ite.h: Global defines for the I2C controller on board the |
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| 4 | ITE MIPS processor. |
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| 5 | -------------------------------------------------------------------- |
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| 6 | Hai-Pao Fan, MontaVista Software, Inc. |
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| 7 | hpfan@mvista.com or source@mvista.com |
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| 8 | |||
| 9 | Copyright 2001 MontaVista Software Inc. |
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| 10 | |||
| 11 | * This program is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by the |
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| 13 | * Free Software Foundation; either version 2 of the License, or (at your |
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| 14 | * option) any later version. |
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| 15 | * |
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| 16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
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| 19 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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| 22 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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| 23 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 26 | * |
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| 27 | * You should have received a copy of the GNU General Public License along |
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| 28 | * with this program; if not, write to the Free Software Foundation, Inc., |
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| 29 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 30 | |||
| 31 | */ |
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| 32 | |||
| 33 | #ifndef I2C_ITE_H |
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| 34 | #define I2C_ITE_H 1 |
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| 35 | |||
| 36 | #include <asm/it8172/it8172.h> |
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| 37 | |||
| 38 | /* I2C Registers */ |
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| 39 | #define ITE_I2CHCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x30 |
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| 40 | #define ITE_I2CHSR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x34 |
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| 41 | #define ITE_I2CSAR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x38 |
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| 42 | #define ITE_I2CSSAR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x3c |
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| 43 | #define ITE_I2CCKCNT IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x48 |
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| 44 | #define ITE_I2CSHDR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x4c |
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| 45 | #define ITE_I2CRSUR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x50 |
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| 46 | #define ITE_I2CPSUR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x54 |
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| 47 | |||
| 48 | #define ITE_I2CFDR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x70 |
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| 49 | #define ITE_I2CFBCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x74 |
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| 50 | #define ITE_I2CFCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x78 |
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| 51 | #define ITE_I2CFSR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x7c |
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| 52 | |||
| 53 | |||
| 54 | /* Host Control Register ITE_I2CHCR */ |
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| 55 | #define ITE_I2CHCR_HCE 0x01 /* Enable I2C Host Controller */ |
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| 56 | #define ITE_I2CHCR_IE 0x02 /* Enable the interrupt after completing |
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| 57 | the current transaction */ |
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| 58 | #define ITE_I2CHCR_CP_W 0x00 /* bit2-4 000 - Write */ |
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| 59 | #define ITE_I2CHCR_CP_R 0x08 /* 010 - Current address read */ |
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| 60 | #define ITE_I2CHCR_CP_S 0x10 /* 100 - Sequential read */ |
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| 61 | #define ITE_I2CHCR_ST 0x20 /* Initiates the I2C host controller to execute |
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| 62 | the command and send the data programmed in |
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| 63 | all required registers to I2C bus */ |
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| 64 | #define ITE_CMD ITE_I2CHCR_HCE | ITE_I2CHCR_IE | ITE_I2CHCR_ST |
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| 65 | #define ITE_WRITE ITE_CMD | ITE_I2CHCR_CP_W |
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| 66 | #define ITE_READ ITE_CMD | ITE_I2CHCR_CP_R |
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| 67 | #define ITE_SREAD ITE_CMD | ITE_I2CHCR_CP_S |
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| 68 | |||
| 69 | /* Host Status Register ITE_I2CHSR */ |
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| 70 | #define ITE_I2CHSR_DB 0x01 /* Device is busy, receives NACK response except |
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| 71 | in the first and last bytes */ |
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| 72 | #define ITE_I2CHSR_DNE 0x02 /* Target address on I2C bus does not exist */ |
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| 73 | #define ITE_I2CHSR_TDI 0x04 /* R/W Transaction on I2C bus was completed */ |
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| 74 | #define ITE_I2CHSR_HB 0x08 /* Host controller is processing transactions */ |
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| 75 | #define ITE_I2CHSR_FER 0x10 /* Error occurs in the FIFO */ |
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| 76 | |||
| 77 | /* Slave Address Register ITE_I2CSAR */ |
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| 78 | #define ITE_I2CSAR_SA_MASK 0xfe /* Target I2C device address */ |
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| 79 | #define ITE_I2CSAR_ASO 0x0100 /* Output 1/0 to I2CAS port when the |
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| 80 | next slave address is addressed */ |
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| 81 | |||
| 82 | /* Slave Sub-address Register ITE_I2CSSAR */ |
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| 83 | #define ITE_I2CSSAR_SUBA_MASK 0xff /* Target I2C device sub-address */ |
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| 84 | |||
| 85 | /* Clock Counter Register ITE_I2CCKCNT */ |
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| 86 | #define ITE_I2CCKCNT_STOP 0x00 /* stop I2C clock */ |
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| 87 | #define ITE_I2CCKCNT_HPCC_MASK 0x7f /* SCL high period counter */ |
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| 88 | #define ITE_I2CCKCNT_LPCC_MASK 0x7f00 /* SCL low period counter */ |
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| 89 | |||
| 90 | /* START Hold Time Register ITE_I2CSHDR */ |
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| 91 | /* value is counted based on 16 MHz internal clock */ |
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| 92 | #define ITE_I2CSHDR_FM 0x0a /* START condition at fast mode */ |
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| 93 | #define ITE_I2CSHDR_SM 0x47 /* START contition at standard mode */ |
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| 94 | |||
| 95 | /* (Repeated) START Setup Time Register ITE_I2CRSUR */ |
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| 96 | /* value is counted based on 16 MHz internal clock */ |
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| 97 | #define ITE_I2CRSUR_FM 0x0a /* repeated START condition at fast mode */ |
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| 98 | #define ITE_I2CRSUR_SM 0x50 /* repeated START condition at standard mode */ |
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| 99 | |||
| 100 | /* STOP setup Time Register ITE_I2CPSUR */ |
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| 101 | |||
| 102 | /* FIFO Data Register ITE_I2CFDR */ |
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| 103 | #define ITE_I2CFDR_MASK 0xff |
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| 104 | |||
| 105 | /* FIFO Byte Count Register ITE_I2CFBCR */ |
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| 106 | #define ITE_I2CFBCR_MASK 0x3f |
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| 107 | |||
| 108 | /* FIFO Control Register ITE_I2CFCR */ |
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| 109 | #define ITE_I2CFCR_FLUSH 0x01 /* Flush FIFO and reset the FIFO point |
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| 110 | and I2CFSR */ |
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| 111 | /* FIFO Status Register ITE_I2CFSR */ |
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| 112 | #define ITE_I2CFSR_FO 0x01 /* FIFO is overrun when write */ |
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| 113 | #define ITE_I2CFSR_FU 0x02 /* FIFO is underrun when read */ |
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| 114 | #define ITE_I2CFSR_FF 0x04 /* FIFO is full when write */ |
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| 115 | #define ITE_I2CFSR_FE 0x08 /* FIFO is empty when read */ |
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| 116 | |||
| 117 | #endif /* I2C_ITE_H */ |