| /******************************************************************************** |
| * Marvell GPL License Option |
| * |
| * If you received this File from Marvell, you may opt to use, redistribute and/or |
| * modify this File in accordance with the terms and conditions of the General |
| * Public License Version 2, June 1991 (the "GPL License"), a copy of which is |
| * available along with the File in the license.txt file or by writing to the Free |
| * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or |
| * on the worldwide web at http://www.gnu.org/licenses/gpl.txt. |
| * |
| * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY |
| * DISCLAIMED. The GPL License provides additional details about this warranty |
| * disclaimer. |
| ********************************************************************************/ |
| #ifndef _I2C_MASTER_H_ |
| #define _I2C_MASTER_H_ |
| |
| #if 0 |
| /* slv_addr */ |
| #define TWSI_SLVADDR_THS8200a 0x20 |
| #define TWSI_SLVADDR_CS4382A 0x18 |
| |
| /* addr_type */ |
| #define TWSI_7BIT_SLAVE_ADDR 0 |
| #define TWSI_10BIT_SLAVE_ADDR 1 |
| |
| /* speed_type, negleted currently */ |
| #define TWSI_STANDARD_SPEED 0 /* 100K, 400K and 3.4MHz in standard type */ |
| #define TWSI_CUSTOM_SPEED 1 /* any speed in custom type */ |
| #endif |
| |
| /* speed */ |
| #define TWSI_SPEED_100 100 |
| #define TWSI_SPEED_400 400 |
| #define TWSI_SPEED_3400 3400 |
| |
| /* |
| * ioctl commands |
| */ |
| #define TWSI_IOCTL_READWRITE 0x1619 |
| #define TWSI_IOCTL_SETSPEED 0x1234 |
| |
| /* |
| * struction maintained by linux kernel, user doesn't use it |
| */ |
| typedef struct galois_twsi_info { |
| uint mst_id; /* : master num you're operating */ |
| uint slv_addr; /* : the slave's address you're operating */ |
| uint addr_type; /* : the slave is 7Bit address or 10 Bit address */ |
| uint xd_mode; /* : defined by Xiaodong, see above TWSIDEV_XDMODExxx */ |
| uint speed_type;/* : TWSI_STANDARD_SPEED or TWSI_CUSTOM_SPEED, ignored now */ |
| uint speed; /* : 100K, 400K or 3400 or..., ignored now */ |
| int irq; /* : kernel info, don't touch */ |
| int usable; /* : kernel info, don't touch */ |
| } galois_twsi_info_t; |
| |
| /* |
| * read-write data from/to TWSI slave, TWSI_IOCTL_READWRITE |
| */ |
| typedef struct galois_twsi_rw { |
| uint mst_id; /* user input: master num you're operating */ |
| uint slv_addr; /* user input: the slave's address you're operating */ |
| uint addr_type; /* user input: the slave is 7Bit address or 10 Bit address */ |
| |
| uint rd_cnt; /* read number in byte */ |
| unsigned char *rd_buf; /* data buffer for read */ |
| uint wr_cnt; /* write number in byte */ |
| unsigned char *wr_buf; /* data buffer for write */ |
| } galois_twsi_rw_t; |
| |
| /* |
| * set twsi speed |
| */ |
| typedef struct galois_twsi_speed { |
| uint mst_id; /* user input: master num you're operating */ |
| uint speed_type;/* user input: TWSI_STANDARD_SPEED or TWSI_CUSTOM_SPEED */ |
| uint speed; /* user input: if speed==0, user old setting, else update twsi speed */ |
| } galois_twsi_speed_t; |
| |
| // error code definitions |
| #ifndef I2C_OK |
| #define I2C_OK 1 |
| #endif |
| #ifndef I2C_EBADPARAM |
| #define I2C_EBADPARAM -1 |
| #endif |
| #ifndef I2C_EUNSUPPORT |
| #define I2C_EUNSUPPORT -2 |
| #endif |
| #ifndef I2C_EBUSRW |
| #define I2C_EBUSRW -8 |
| #endif |
| #ifndef I2C_EBUSY |
| #define I2C_EBUSY -9 |
| #endif |
| |
| // I2C bus speed types |
| #define I2C_STANDARD_SPEED 0 // only 100K, 400K and 3.4MHz are supported in standard type |
| #define I2C_CUSTOM_SPEED 1 // any speed can be specified by users in custom type |
| |
| // I2C slave address type |
| #define I2C_7BIT_SLAVE_ADDR 0 |
| #define I2C_10BIT_SLAVE_ADDR 1 |
| |
| /****************************************** |
| * global function declarations |
| *****************************************/ |
| /********************************************************* |
| * FUNCTION: judge if the i2c_bus is idle |
| * PARAMS: master_id - id of I2C master to init |
| * RETURN: I2C_OK - idle |
| * I2C_EBADPARAM - invalid parameter |
| * I2C_EBUSY - used by others |
| ********************************************************/ |
| int i2c_master_is_idle(int master_id); |
| |
| /********************************************************* |
| * FUNCTION: init I2C master: set default bus speed |
| * PARAMS: master_id - id of I2C master to init |
| * RETURN: I2C_OK - succeed |
| * I2C_EBADPARAM - invalid parameter |
| ********************************************************/ |
| int i2c_master_init(int master_id); |
| |
| /******************************************************************** |
| * FUNCTION: set I2C master bus speed |
| * PARAMS: master_id - id of I2C master to config |
| * type - STANDARD or CUSTOM |
| * speed - in unit of KHz |
| * RETURN: I2C_OK - succeed |
| * I2C_EBUSY - I2C module is enabled |
| * I2C_EUNSUPPORT - not support |
| * NOTE: in STANDARD type, only 100 and 400 KHz speed are supported |
| ********************************************************************/ |
| int i2c_master_set_speed(int master_id, int type, int speed); |
| |
| /*********************************************************************** |
| * FUNCTION: read bytes from slave device |
| * PARAMS: master_id - id of I2C master to operate |
| * slave_addr - address of slave device |
| * addr_type - address type: I2C_7BIT_SLAVE_ADDR or I2C_10BIT_SLAVE_ADDR |
| * pwbuf - pointer of write buffer |
| * wnum - number of bytes to write |
| * prbuf - pointer of read buffer |
| * rnum - number of bytes to read |
| * RETURN: I2C_OK - succeed * I2C_EBUSY - I2C module is enabled |
| * I2C_EBUSRW - read fail |
| * NOTE: maximum write bytes is 260, maximum read bytes is 256 in a single |
| * transaction |
| ***********************************************************************/ |
| int i2c_master_writeread_bytes(int master_id, int slave_addr, int addr_type, unsigned char *pwbuf, int wnum, unsigned char *prbuf, int rnum, int dum ); |
| |
| /************************************************ |
| * i2c master interrupt service routine |
| ***********************************************/ |
| void i2c_master_irs(int master_id); |
| |
| #endif |
