1 /* ------------------------------------------------------------------------- */
2 /* i2c-iop3xx.h algorithm driver definitions private to i2c-iop3xx.c */
3 /* ------------------------------------------------------------------------- */
4 /* Copyright (C) 2003 Peter Milne, D-TACQ Solutions Ltd
5 * <Peter dot Milne at D hyphen TACQ dot com>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, version 2.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19 /* ------------------------------------------------------------------------- */
23 #define I2C_IOP3XX_H 1
26 * iop321 hardware bit definitions
28 #define IOP3XX_ICR_FAST_MODE 0x8000 /* 1=400kBps, 0=100kBps */
29 #define IOP3XX_ICR_UNIT_RESET 0x4000 /* 1=RESET */
30 #define IOP3XX_ICR_SAD_IE 0x2000 /* 1=Slave Detect Interrupt Enable */
31 #define IOP3XX_ICR_ALD_IE 0x1000 /* 1=Arb Loss Detect Interrupt Enable */
32 #define IOP3XX_ICR_SSD_IE 0x0800 /* 1=Slave STOP Detect Interrupt Enable */
33 #define IOP3XX_ICR_BERR_IE 0x0400 /* 1=Bus Error Interrupt Enable */
34 #define IOP3XX_ICR_RXFULL_IE 0x0200 /* 1=Receive Full Interrupt Enable */
35 #define IOP3XX_ICR_TXEMPTY_IE 0x0100 /* 1=Transmit Empty Interrupt Enable */
36 #define IOP3XX_ICR_GCD 0x0080 /* 1=General Call Disable */
38 * IOP3XX_ICR_GCD: 1 disables response as slave. "This bit must be set
39 * when sending a master mode general call message from the I2C unit"
41 #define IOP3XX_ICR_UE 0x0040 /* 1=Unit Enable */
43 * "NOTE: To avoid I2C bus integrity problems,
44 * the user needs to ensure that the GPIO Output Data Register -
45 * GPOD bits associated with an I2C port are cleared prior to setting
46 * the enable bit for that I2C serial port.
47 * The user prepares to enable I2C port 0 and
48 * I2C port 1 by clearing GPOD bits 7:6 and GPOD bits 5:4, respectively.
50 #define IOP3XX_ICR_SCLEN 0x0020 /* 1=SCL enable for master mode */
51 #define IOP3XX_ICR_MABORT 0x0010 /* 1=Send a STOP with no data
52 * NB TBYTE must be clear */
53 #define IOP3XX_ICR_TBYTE 0x0008 /* 1=Send/Receive a byte. i2c clears */
54 #define IOP3XX_ICR_NACK 0x0004 /* 1=reply with NACK */
55 #define IOP3XX_ICR_MSTOP 0x0002 /* 1=send a STOP after next data byte */
56 #define IOP3XX_ICR_MSTART 0x0001 /* 1=initiate a START */
59 #define IOP3XX_ISR_BERRD 0x0400 /* 1=BUS ERROR Detected */
60 #define IOP3XX_ISR_SAD 0x0200 /* 1=Slave ADdress Detected */
61 #define IOP3XX_ISR_GCAD 0x0100 /* 1=General Call Address Detected */
62 #define IOP3XX_ISR_RXFULL 0x0080 /* 1=Receive Full */
63 #define IOP3XX_ISR_TXEMPTY 0x0040 /* 1=Transmit Empty */
64 #define IOP3XX_ISR_ALD 0x0020 /* 1=Arbitration Loss Detected */
65 #define IOP3XX_ISR_SSD 0x0010 /* 1=Slave STOP Detected */
66 #define IOP3XX_ISR_BBUSY 0x0008 /* 1=Bus BUSY */
67 #define IOP3XX_ISR_UNITBUSY 0x0004 /* 1=Unit Busy */
68 #define IOP3XX_ISR_NACK 0x0002 /* 1=Unit Rx or Tx a NACK */
69 #define IOP3XX_ISR_RXREAD 0x0001 /* 1=READ 0=WRITE (R/W bit of slave addr */
71 #define IOP3XX_ISR_CLEARBITS 0x07f0
73 #define IOP3XX_ISAR_SAMASK 0x007f
75 #define IOP3XX_IDBR_MASK 0x00ff
77 #define IOP3XX_IBMR_SCL 0x0002
78 #define IOP3XX_IBMR_SDA 0x0001
80 #define IOP3XX_GPOD_I2C0 0x00c0 /* clear these bits to enable ch0 */
81 #define IOP3XX_GPOD_I2C1 0x0030 /* clear these bits to enable ch1 */
83 #define MYSAR 0 /* default slave address */
86 #define I2C_ERR_BERR (I2C_ERR+0)
87 #define I2C_ERR_ALD (I2C_ERR+1)
92 #define SAR_OFFSET 0x8
93 #define DBR_OFFSET 0xc
94 #define CCR_OFFSET 0x10
95 #define BMR_OFFSET 0x14
97 #define IOP3XX_I2C_IO_SIZE 0x18
99 struct i2c_algo_iop3xx_data {
100 void __iomem *ioaddr;
101 wait_queue_head_t waitq;
103 u32 SR_enabled, SR_received;
107 #endif /* I2C_IOP3XX_H */