| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| Uwe Zeisberger | f30c226 | 2006-10-03 23:01:26 +0200 | [diff] [blame] | 2 | * drivers/i2c/busses/i2c-ibm_iic.h |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Support for the IIC peripheral on IBM PPC 4xx |
| 5 | * |
| 6 | * Copyright (c) 2003 Zultys Technologies. |
| 7 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> |
| 8 | * |
| 9 | * Based on original work by |
| 10 | * Ian DaSilva <idasilva@mvista.com> |
| 11 | * Armin Kuster <akuster@mvista.com> |
| 12 | * Matt Porter <mporter@mvista.com> |
| 13 | * |
| 14 | * Copyright 2000-2003 MontaVista Software Inc. |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify it |
| 17 | * under the terms of the GNU General Public License as published by the |
| 18 | * Free Software Foundation; either version 2 of the License, or (at your |
| 19 | * option) any later version. |
| 20 | * |
| 21 | */ |
| 22 | #ifndef __I2C_IBM_IIC_H_ |
| 23 | #define __I2C_IBM_IIC_H_ |
| 24 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/i2c.h> |
| 26 | |
| 27 | struct iic_regs { |
| 28 | u16 mdbuf; |
| 29 | u16 sbbuf; |
| 30 | u8 lmadr; |
| 31 | u8 hmadr; |
| 32 | u8 cntl; |
| 33 | u8 mdcntl; |
| 34 | u8 sts; |
| 35 | u8 extsts; |
| 36 | u8 lsadr; |
| 37 | u8 hsadr; |
| 38 | u8 clkdiv; |
| 39 | u8 intmsk; |
| 40 | u8 xfrcnt; |
| 41 | u8 xtcntlss; |
| 42 | u8 directcntl; |
| 43 | }; |
| 44 | |
| 45 | struct ibm_iic_private { |
| 46 | struct i2c_adapter adap; |
| 47 | volatile struct iic_regs __iomem *vaddr; |
| 48 | wait_queue_head_t wq; |
| 49 | int idx; |
| 50 | int irq; |
| 51 | int fast_mode; |
| 52 | u8 clckdiv; |
| 53 | }; |
| 54 | |
| 55 | /* IICx_CNTL register */ |
| 56 | #define CNTL_HMT 0x80 |
| 57 | #define CNTL_AMD 0x40 |
| 58 | #define CNTL_TCT_MASK 0x30 |
| 59 | #define CNTL_TCT_SHIFT 4 |
| 60 | #define CNTL_RPST 0x08 |
| 61 | #define CNTL_CHT 0x04 |
| 62 | #define CNTL_RW 0x02 |
| 63 | #define CNTL_PT 0x01 |
| 64 | |
| 65 | /* IICx_MDCNTL register */ |
| 66 | #define MDCNTL_FSDB 0x80 |
| 67 | #define MDCNTL_FMDB 0x40 |
| 68 | #define MDCNTL_EGC 0x20 |
| 69 | #define MDCNTL_FSM 0x10 |
| 70 | #define MDCNTL_ESM 0x08 |
| 71 | #define MDCNTL_EINT 0x04 |
| 72 | #define MDCNTL_EUBS 0x02 |
| 73 | #define MDCNTL_HSCL 0x01 |
| 74 | |
| 75 | /* IICx_STS register */ |
| 76 | #define STS_SSS 0x80 |
| 77 | #define STS_SLPR 0x40 |
| 78 | #define STS_MDBS 0x20 |
| 79 | #define STS_MDBF 0x10 |
| 80 | #define STS_SCMP 0x08 |
| 81 | #define STS_ERR 0x04 |
| 82 | #define STS_IRQA 0x02 |
| 83 | #define STS_PT 0x01 |
| 84 | |
| 85 | /* IICx_EXTSTS register */ |
| 86 | #define EXTSTS_IRQP 0x80 |
| 87 | #define EXTSTS_BCS_MASK 0x70 |
| 88 | #define EXTSTS_BCS_FREE 0x40 |
| 89 | #define EXTSTS_IRQD 0x08 |
| 90 | #define EXTSTS_LA 0x04 |
| 91 | #define EXTSTS_ICT 0x02 |
| 92 | #define EXTSTS_XFRA 0x01 |
| 93 | |
| 94 | /* IICx_INTRMSK register */ |
| 95 | #define INTRMSK_EIRC 0x80 |
| 96 | #define INTRMSK_EIRS 0x40 |
| 97 | #define INTRMSK_EIWC 0x20 |
| 98 | #define INTRMSK_EIWS 0x10 |
| 99 | #define INTRMSK_EIHE 0x08 |
| 100 | #define INTRMSK_EIIC 0x04 |
| 101 | #define INTRMSK_EITA 0x02 |
| 102 | #define INTRMSK_EIMTC 0x01 |
| 103 | |
| 104 | /* IICx_XFRCNT register */ |
| 105 | #define XFRCNT_MTC_MASK 0x07 |
| 106 | |
| 107 | /* IICx_XTCNTLSS register */ |
| 108 | #define XTCNTLSS_SRC 0x80 |
| 109 | #define XTCNTLSS_SRS 0x40 |
| 110 | #define XTCNTLSS_SWC 0x20 |
| 111 | #define XTCNTLSS_SWS 0x10 |
| 112 | #define XTCNTLSS_SRST 0x01 |
| 113 | |
| 114 | /* IICx_DIRECTCNTL register */ |
| 115 | #define DIRCNTL_SDAC 0x08 |
| 116 | #define DIRCNTL_SCC 0x04 |
| 117 | #define DIRCNTL_MSDA 0x02 |
| 118 | #define DIRCNTL_MSC 0x01 |
| 119 | |
| 120 | /* Check if we really control the I2C bus and bus is free */ |
| 121 | #define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f) |
| 122 | |
| 123 | #endif /* __I2C_IBM_IIC_H_ */ |