drivers/i2c/busses/i2c-iop3xx.h

   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>
   6
   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.
  10
  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.                             */
  15 /* ------------------------------------------------------------------------- */
  16
  17
  18 #ifndef I2C_IOP3XX_H
  19 #define I2C_IOP3XX_H 1
  20
  21 /*
  22  * iop321 hardware bit definitions
  23  */
  24 #define IOP3XX_ICR_FAST_MODE    0x8000  /* 1=400kBps, 0=100kBps */
  25 #define IOP3XX_ICR_UNIT_RESET   0x4000  /* 1=RESET */
  26 #define IOP3XX_ICR_SAD_IE       0x2000  /* 1=Slave Detect Interrupt Enable */
  27 #define IOP3XX_ICR_ALD_IE       0x1000  /* 1=Arb Loss Detect Interrupt Enable */
  28 #define IOP3XX_ICR_SSD_IE       0x0800  /* 1=Slave STOP Detect Interrupt Enable */
  29 #define IOP3XX_ICR_BERR_IE      0x0400  /* 1=Bus Error Interrupt Enable */
  30 #define IOP3XX_ICR_RXFULL_IE    0x0200  /* 1=Receive Full Interrupt Enable */
  31 #define IOP3XX_ICR_TXEMPTY_IE   0x0100  /* 1=Transmit Empty Interrupt Enable */
  32 #define IOP3XX_ICR_GCD          0x0080  /* 1=General Call Disable */
  33 /*
  34  * IOP3XX_ICR_GCD: 1 disables response as slave. "This bit must be set
  35  * when sending a master mode general call message from the I2C unit"
  36  */
  37 #define IOP3XX_ICR_UE           0x0040  /* 1=Unit Enable */
  38 /*
  39  * "NOTE: To avoid I2C bus integrity problems,
  40  * the user needs to ensure that the GPIO Output Data Register -
  41  * GPOD bits associated with an I2C port are cleared prior to setting
  42  * the enable bit for that I2C serial port.
  43  * The user prepares to enable I2C port 0 and
  44  * I2C port 1 by clearing GPOD bits 7:6 and GPOD bits 5:4, respectively.
  45  */
  46 #define IOP3XX_ICR_SCLEN        0x0020  /* 1=SCL enable for master mode */
  47 #define IOP3XX_ICR_MABORT       0x0010  /* 1=Send a STOP with no data
  48                                          * NB TBYTE must be clear */
  49 #define IOP3XX_ICR_TBYTE        0x0008  /* 1=Send/Receive a byte. i2c clears */
  50 #define IOP3XX_ICR_NACK         0x0004  /* 1=reply with NACK */
  51 #define IOP3XX_ICR_MSTOP        0x0002  /* 1=send a STOP after next data byte */
  52 #define IOP3XX_ICR_MSTART       0x0001  /* 1=initiate a START */
  53
  54
  55 #define IOP3XX_ISR_BERRD        0x0400  /* 1=BUS ERROR Detected */
  56 #define IOP3XX_ISR_SAD          0x0200  /* 1=Slave ADdress Detected */
  57 #define IOP3XX_ISR_GCAD         0x0100  /* 1=General Call Address Detected */
  58 #define IOP3XX_ISR_RXFULL       0x0080  /* 1=Receive Full */
  59 #define IOP3XX_ISR_TXEMPTY      0x0040  /* 1=Transmit Empty */
  60 #define IOP3XX_ISR_ALD          0x0020  /* 1=Arbitration Loss Detected */
  61 #define IOP3XX_ISR_SSD          0x0010  /* 1=Slave STOP Detected */
  62 #define IOP3XX_ISR_BBUSY        0x0008  /* 1=Bus BUSY */
  63 #define IOP3XX_ISR_UNITBUSY     0x0004  /* 1=Unit Busy */
  64 #define IOP3XX_ISR_NACK         0x0002  /* 1=Unit Rx or Tx a NACK */
  65 #define IOP3XX_ISR_RXREAD       0x0001  /* 1=READ 0=WRITE (R/W bit of slave addr */
  66
  67 #define IOP3XX_ISR_CLEARBITS    0x07f0
  68
  69 #define IOP3XX_ISAR_SAMASK      0x007f
  70
  71 #define IOP3XX_IDBR_MASK        0x00ff
  72
  73 #define IOP3XX_IBMR_SCL         0x0002
  74 #define IOP3XX_IBMR_SDA         0x0001
  75
  76 #define IOP3XX_GPOD_I2C0        0x00c0  /* clear these bits to enable ch0 */
  77 #define IOP3XX_GPOD_I2C1        0x0030  /* clear these bits to enable ch1 */
  78
  79 #define MYSAR                   0       /* default slave address */
  80
  81 #define I2C_ERR                 321
  82 #define I2C_ERR_BERR            (I2C_ERR+0)
  83 #define I2C_ERR_ALD             (I2C_ERR+1)
  84
  85
  86 #define CR_OFFSET               0
  87 #define SR_OFFSET               0x4
  88 #define SAR_OFFSET              0x8
  89 #define DBR_OFFSET              0xc
  90 #define CCR_OFFSET              0x10
  91 #define BMR_OFFSET              0x14
  92
  93 #define IOP3XX_I2C_IO_SIZE      0x18
  94
  95 struct i2c_algo_iop3xx_data {
  96         void __iomem *ioaddr;
  97         wait_queue_head_t waitq;
  98         spinlock_t lock;
  99         u32 SR_enabled, SR_received;
 100         int id;
 101 };
 102
 103 #endif /* I2C_IOP3XX_H */