| /* |
| * 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. |
| * ---------------------------------------------------------------------------- |
| * |
| */ |
| |
| |
| #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 |
| * @rx_outstanding: current master-rx elements in tx fifo |
| * @ss_hcnt: standard speed HCNT value |
| * @ss_lcnt: standard speed LCNT value |
| * @fs_hcnt: fast speed HCNT value |
| * @fs_lcnt: fast speed LCNT value |
| * |
| * HCNT and LCNT parameters can be used if the platform knows more accurate |
| * values than the one computed based only on the input clock frequency. |
| * Leave them to be %0 if not used. |
| */ |
| 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; |
| u32 accessor_flags; |
| struct i2c_adapter adapter; |
| u32 functionality; |
| u32 master_cfg; |
| unsigned int tx_fifo_depth; |
| unsigned int rx_fifo_depth; |
| int rx_outstanding; |
| u32 sda_hold_time; |
| u32 sda_falling_time; |
| u32 scl_falling_time; |
| u16 ss_hcnt; |
| u16 ss_lcnt; |
| u16 fs_hcnt; |
| u16 fs_lcnt; |
| }; |
| |
| #define ACCESS_SWAP 0x00000001 |
| #define ACCESS_16BIT 0x00000002 |
| |
| 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); |
