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