diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-core.h')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-core.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h new file mode 100644 index 000000000000..02d1a2ddd853 --- /dev/null +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -0,0 +1,105 @@ +/* + * Synopsys DesignWare I2C adapter driver (master only). + * + * Based on the TI DAVINCI I2C adapter driver. + * + * Copyright (C) 2006 Texas Instruments. + * Copyright (C) 2007 MontaVista Software Inc. + * Copyright (C) 2009 Provigent Ltd. + * + * ---------------------------------------------------------------------------- + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * ---------------------------------------------------------------------------- + * + */ + + +#define DW_IC_CON_MASTER 0x1 +#define DW_IC_CON_SPEED_STD 0x2 +#define DW_IC_CON_SPEED_FAST 0x4 +#define DW_IC_CON_10BITADDR_MASTER 0x10 +#define DW_IC_CON_RESTART_EN 0x20 +#define DW_IC_CON_SLAVE_DISABLE 0x40 + + +/** + * struct dw_i2c_dev - private i2c-designware data + * @dev: driver model device node + * @base: IO registers pointer + * @cmd_complete: tx completion indicator + * @lock: protect this struct and IO registers + * @clk: input reference clock + * @cmd_err: run time hadware error code + * @msgs: points to an array of messages currently being transfered + * @msgs_num: the number of elements in msgs + * @msg_write_idx: the element index of the current tx message in the msgs + * array + * @tx_buf_len: the length of the current tx buffer + * @tx_buf: the current tx buffer + * @msg_read_idx: the element index of the current rx message in the msgs + * array + * @rx_buf_len: the length of the current rx buffer + * @rx_buf: the current rx buffer + * @msg_err: error status of the current transfer + * @status: i2c master status, one of STATUS_* + * @abort_source: copy of the TX_ABRT_SOURCE register + * @irq: interrupt number for the i2c master + * @adapter: i2c subsystem adapter node + * @tx_fifo_depth: depth of the hardware tx fifo + * @rx_fifo_depth: depth of the hardware rx fifo + */ +struct dw_i2c_dev { + struct device *dev; + void __iomem *base; + struct completion cmd_complete; + struct mutex lock; + struct clk *clk; + u32 (*get_clk_rate_khz) (struct dw_i2c_dev *dev); + struct dw_pci_controller *controller; + int cmd_err; + struct i2c_msg *msgs; + int msgs_num; + int msg_write_idx; + u32 tx_buf_len; + u8 *tx_buf; + int msg_read_idx; + u32 rx_buf_len; + u8 *rx_buf; + int msg_err; + unsigned int status; + u32 abort_source; + int irq; + int swab; + struct i2c_adapter adapter; + u32 functionality; + u32 master_cfg; + unsigned int tx_fifo_depth; + unsigned int rx_fifo_depth; +}; + +extern u32 dw_readl(struct dw_i2c_dev *dev, int offset); +extern void dw_writel(struct dw_i2c_dev *dev, u32 b, int offset); +extern int i2c_dw_init(struct dw_i2c_dev *dev); +extern int i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], + int num); +extern u32 i2c_dw_func(struct i2c_adapter *adap); +extern irqreturn_t i2c_dw_isr(int this_irq, void *dev_id); +extern void i2c_dw_enable(struct dw_i2c_dev *dev); +extern u32 i2c_dw_is_enabled(struct dw_i2c_dev *dev); +extern void i2c_dw_disable(struct dw_i2c_dev *dev); +extern void i2c_dw_clear_int(struct dw_i2c_dev *dev); +extern void i2c_dw_disable_int(struct dw_i2c_dev *dev); +extern u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev); |