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97 lines
3.6 KiB
97 lines
3.6 KiB
20 years ago
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/*
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* arch/mips/pmc-sierra/yosemite/i2c-yosemite.h
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*
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* Copyright (C) 2003 PMC-Sierra Inc.
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* Author: Manish Lachwani (lachwani@pmc-sierra.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __I2C_YOSEMITE_H
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#define __I2C_YOSEMITE_H
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/* Read and Write operations to the chip */
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#define TITAN_I2C_BASE 0xbb000000 /* XXX Needs to change */
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#define TITAN_I2C_WRITE(offset, data) \
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*(volatile unsigned long *)(TITAN_I2C_BASE + offset) = data
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#define TITAN_I2C_READ(offset) *(volatile unsigned long *)(TITAN_I2C_BASE + offset)
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/* Local constansts*/
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#define TITAN_I2C_MAX_FILTER 15
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#define TITAN_I2C_MAX_CLK 1023
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#define TITAN_I2C_MAX_ARBF 15
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#define TITAN_I2C_MAX_NAK 15
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#define TITAN_I2C_MAX_MASTERCODE 7
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#define TITAN_I2C_MAX_WORDS_PER_RW 4
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#define TITAN_I2C_MAX_POLL 100
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/* Registers used for I2C work */
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#define TITAN_I2C_SCMB_CONTROL 0x0180 /* SCMB Control */
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#define TITAN_I2C_SCMB_CLOCK_A 0x0184 /* SCMB Clock A */
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#define TITAN_I2C_SCMB_CLOCK_B 0x0188 /* SCMB Clock B */
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#define TITAN_I2C_CONFIG 0x01A0 /* I2C Config */
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#define TITAN_I2C_COMMAND 0x01A4 /* I2C Command */
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#define TITAN_I2C_SLAVE_ADDRESS 0x01A8 /* I2C Slave Address */
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#define TITAN_I2C_DATA 0x01AC /* I2C Data [15:0] */
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#define TITAN_I2C_INTERRUPTS 0x01BC /* I2C Interrupts */
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/* Error */
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#define TITAN_I2C_ERR_ARB_LOST (-9220)
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#define TITAN_I2C_ERR_NO_RESP (-9221)
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#define TITAN_I2C_ERR_DATA_COLLISION (-9222)
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#define TITAN_I2C_ERR_TIMEOUT (-9223)
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#define TITAN_I2C_ERR_OK 0
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/* I2C Command Type */
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typedef enum {
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TITAN_I2C_CMD_WRITE = 0,
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TITAN_I2C_CMD_READ = 1,
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TITAN_I2C_CMD_READ_WRITE = 2
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} titan_i2c_cmd_type;
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/* I2C structures */
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typedef struct {
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int filtera; /* Register 0x0184, bits 15 - 12 */
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int clka; /* Register 0x0184, bits 9 - 0 */
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int filterb; /* Register 0x0188, bits 15 - 12 */
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int clkb; /* Register 0x0188, bits 9 - 0 */
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} titan_i2c_config;
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/* I2C command type */
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typedef struct {
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titan_i2c_cmd_type type; /* Type of command */
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int num_arb; /* Register 0x01a0, bits 15 - 12 */
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int num_nak; /* Register 0x01a0, bits 11 - 8 */
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int addr_size; /* Register 0x01a0, bit 7 */
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int mst_code; /* Register 0x01a0, bits 6 - 4 */
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int arb_en; /* Register 0x01a0, bit 1 */
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int speed; /* Register 0x01a0, bit 0 */
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int slave_addr; /* Register 0x01a8 */
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int write_size; /* Register 0x01a4, bits 10 - 8 */
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unsigned int *data; /* Register 0x01ac */
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} titan_i2c_command;
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#endif /* __I2C_YOSEMITE_H */
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