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/*
* (C) Copyright 2009
* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __DW_I2C_H_
#define __DW_I2C_H_
struct i2c_regs {
u32 ic_con;
u32 ic_tar;
u32 ic_sar;
u32 ic_hs_maddr;
u32 ic_cmd_data;
u32 ic_ss_scl_hcnt;
u32 ic_ss_scl_lcnt;
u32 ic_fs_scl_hcnt;
u32 ic_fs_scl_lcnt;
u32 ic_hs_scl_hcnt;
u32 ic_hs_scl_lcnt;
u32 ic_intr_stat;
u32 ic_intr_mask;
u32 ic_raw_intr_stat;
u32 ic_rx_tl;
u32 ic_tx_tl;
u32 ic_clr_intr;
u32 ic_clr_rx_under;
u32 ic_clr_rx_over;
u32 ic_clr_tx_over;
u32 ic_clr_rd_req;
u32 ic_clr_tx_abrt;
u32 ic_clr_rx_done;
u32 ic_clr_activity;
u32 ic_clr_stop_det;
u32 ic_clr_start_det;
u32 ic_clr_gen_call;
u32 ic_enable;
u32 ic_status;
u32 ic_txflr;
u32 ix_rxflr;
u32 reserved_1;
u32 ic_tx_abrt_source;
};
#define IC_CLK 166
#define NANO_TO_MICRO 1000
/* High and low times in different speed modes (in ns) */
#define MIN_SS_SCL_HIGHTIME 4000
#define MIN_SS_SCL_LOWTIME 5000
#define MIN_FS_SCL_HIGHTIME 800
#define MIN_FS_SCL_LOWTIME 1700
#define MIN_HS_SCL_HIGHTIME 60
#define MIN_HS_SCL_LOWTIME 160
/* Worst case timeout for 1 byte is kept as 2ms */
#define I2C_BYTE_TO (CONFIG_SYS_HZ/500)
#define I2C_STOPDET_TO (CONFIG_SYS_HZ/500)
#define I2C_BYTE_TO_BB (I2C_BYTE_TO * 16)
/* i2c control register definitions */
#define IC_CON_SD 0x0040
#define IC_CON_RE 0x0020
#define IC_CON_10BITADDRMASTER 0x0010
#define IC_CON_10BITADDR_SLAVE 0x0008
#define IC_CON_SPD_MSK 0x0006
#define IC_CON_SPD_SS 0x0002
#define IC_CON_SPD_FS 0x0004
#define IC_CON_SPD_HS 0x0006
#define IC_CON_MM 0x0001
/* i2c target address register definitions */
#define TAR_ADDR 0x0050
/* i2c slave address register definitions */
#define IC_SLAVE_ADDR 0x0002
/* i2c data buffer and command register definitions */
#define IC_CMD 0x0100
/* i2c interrupt status register definitions */
#define IC_GEN_CALL 0x0800
#define IC_START_DET 0x0400
#define IC_STOP_DET 0x0200
#define IC_ACTIVITY 0x0100
#define IC_RX_DONE 0x0080
#define IC_TX_ABRT 0x0040
#define IC_RD_REQ 0x0020
#define IC_TX_EMPTY 0x0010
#define IC_TX_OVER 0x0008
#define IC_RX_FULL 0x0004
#define IC_RX_OVER 0x0002
#define IC_RX_UNDER 0x0001
/* fifo threshold register definitions */
#define IC_TL0 0x00
#define IC_TL1 0x01
#define IC_TL2 0x02
#define IC_TL3 0x03
#define IC_TL4 0x04
#define IC_TL5 0x05
#define IC_TL6 0x06
#define IC_TL7 0x07
#define IC_RX_TL IC_TL0
#define IC_TX_TL IC_TL0
/* i2c enable register definitions */
#define IC_ENABLE_0B 0x0001
/* i2c status register definitions */
#define IC_STATUS_SA 0x0040
#define IC_STATUS_MA 0x0020
#define IC_STATUS_RFF 0x0010
#define IC_STATUS_RFNE 0x0008
#define IC_STATUS_TFE 0x0004
#define IC_STATUS_TFNF 0x0002
#define IC_STATUS_ACT 0x0001
/* Speed Selection */
#define IC_SPEED_MODE_STANDARD 1
#define IC_SPEED_MODE_FAST 2
#define IC_SPEED_MODE_MAX 3
#define I2C_MAX_SPEED 3400000
#define I2C_FAST_SPEED 400000
#define I2C_STANDARD_SPEED 100000
#endif /* __DW_I2C_H_ */
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