/* * 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 * @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 * @acquire_lock: function to acquire a hardware lock on the bus * @release_lock: function to release a hardware lock on the bus * @pm_runtime_disabled: true if pm runtime is disabled * * 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 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; int (*acquire_lock)(struct dw_i2c_dev *dev); void (*release_lock)(struct dw_i2c_dev *dev); bool pm_runtime_disabled; }; #define ACCESS_SWAP 0x00000001 #define ACCESS_16BIT 0x00000002 #define ACCESS_INTR_MASK 0x00000004 extern int i2c_dw_init(struct dw_i2c_dev *dev); extern void i2c_dw_disable(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); extern int i2c_dw_probe(struct dw_i2c_dev *dev); #if IS_ENABLED(CONFIG_I2C_DESIGNWARE_BAYTRAIL) extern int i2c_dw_eval_lock_support(struct dw_i2c_dev *dev); #else
static inline int i2c_dw_eval_lock_support(struct dw_i2c_dev *dev) { return 0; }Contributors
| Person | Tokens | Prop | Commits | CommitProp | |
| david box | david box | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| dirk brandewie | dirk brandewie | 169 | 60.36% | 6 | 35.29% |
| david box | david box | 62 | 22.14% | 2 | 11.76% |
| mika westerberg | mika westerberg | 12 | 4.29% | 1 | 5.88% |
| stefan roese | stefan roese | 10 | 3.57% | 1 | 5.88% |
| jarkko nikula | jarkko nikula | 9 | 3.21% | 1 | 5.88% |
| romain baeriswyl | romain baeriswyl | 6 | 2.14% | 1 | 5.88% |
| xiangliang yu | xiangliang yu | 4 | 1.43% | 1 | 5.88% |
| christian ruppert | christian ruppert | 3 | 1.07% | 1 | 5.88% |
| josef ahmad | josef ahmad | 3 | 1.07% | 1 | 5.88% |
| wolfram sang | wolfram sang | 1 | 0.36% | 1 | 5.88% |
| baruch siach | baruch siach | 1 | 0.36% | 1 | 5.88% |
| Total | 280 | 100.00% | 17 | 100.00% |