diff options
Diffstat (limited to 'arch/mips/pmc-sierra/yosemite/i2c-yosemite.h')
| -rw-r--r-- | arch/mips/pmc-sierra/yosemite/i2c-yosemite.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h new file mode 100644 index 00000000000..31c5523276f --- /dev/null +++ b/arch/mips/pmc-sierra/yosemite/i2c-yosemite.h @@ -0,0 +1,96 @@ +/* + * arch/mips/pmc-sierra/yosemite/i2c-yosemite.h + * + * Copyright (C) 2003 PMC-Sierra Inc. + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __I2C_YOSEMITE_H +#define __I2C_YOSEMITE_H + +/* Read and Write operations to the chip */ + +#define TITAN_I2C_BASE 0xbb000000 /* XXX Needs to change */ + +#define TITAN_I2C_WRITE(offset, data) \ + *(volatile unsigned long *)(TITAN_I2C_BASE + offset) = data + +#define TITAN_I2C_READ(offset) *(volatile unsigned long *)(TITAN_I2C_BASE + offset) + + +/* Local constansts*/ +#define TITAN_I2C_MAX_FILTER 15 +#define TITAN_I2C_MAX_CLK 1023 +#define TITAN_I2C_MAX_ARBF 15 +#define TITAN_I2C_MAX_NAK 15 +#define TITAN_I2C_MAX_MASTERCODE 7 +#define TITAN_I2C_MAX_WORDS_PER_RW 4 +#define TITAN_I2C_MAX_POLL 100 + +/* Registers used for I2C work */ +#define TITAN_I2C_SCMB_CONTROL 0x0180 /* SCMB Control */ +#define TITAN_I2C_SCMB_CLOCK_A 0x0184 /* SCMB Clock A */ +#define TITAN_I2C_SCMB_CLOCK_B 0x0188 /* SCMB Clock B */ +#define TITAN_I2C_CONFIG 0x01A0 /* I2C Config */ +#define TITAN_I2C_COMMAND 0x01A4 /* I2C Command */ +#define TITAN_I2C_SLAVE_ADDRESS 0x01A8 /* I2C Slave Address */ +#define TITAN_I2C_DATA 0x01AC /* I2C Data [15:0] */ +#define TITAN_I2C_INTERRUPTS 0x01BC /* I2C Interrupts */ + +/* Error */ +#define TITAN_I2C_ERR_ARB_LOST (-9220) +#define TITAN_I2C_ERR_NO_RESP (-9221) +#define TITAN_I2C_ERR_DATA_COLLISION (-9222) +#define TITAN_I2C_ERR_TIMEOUT (-9223) +#define TITAN_I2C_ERR_OK 0 + +/* I2C Command Type */ +typedef enum { + TITAN_I2C_CMD_WRITE = 0, + TITAN_I2C_CMD_READ = 1, + TITAN_I2C_CMD_READ_WRITE = 2 +} titan_i2c_cmd_type; + +/* I2C structures */ +typedef struct { + int filtera; /* Register 0x0184, bits 15 - 12 */ + int clka; /* Register 0x0184, bits 9 - 0 */ + int filterb; /* Register 0x0188, bits 15 - 12 */ + int clkb; /* Register 0x0188, bits 9 - 0 */ +} titan_i2c_config; + +/* I2C command type */ +typedef struct { + titan_i2c_cmd_type type; /* Type of command */ + int num_arb; /* Register 0x01a0, bits 15 - 12 */ + int num_nak; /* Register 0x01a0, bits 11 - 8 */ + int addr_size; /* Register 0x01a0, bit 7 */ + int mst_code; /* Register 0x01a0, bits 6 - 4 */ + int arb_en; /* Register 0x01a0, bit 1 */ + int speed; /* Register 0x01a0, bit 0 */ + int slave_addr; /* Register 0x01a8 */ + int write_size; /* Register 0x01a4, bits 10 - 8 */ + unsigned int *data; /* Register 0x01ac */ +} titan_i2c_command; + +#endif /* __I2C_YOSEMITE_H */ |