Lines Matching +full:designware +full:- +full:i2c
1 // SPDX-License-Identifier: GPL-2.0
3 * Synopsys DesignWare I2C adapter driver (slave only).
5 * Based on the Synopsys DesignWare I2C adapter driver (master).
12 #include <linux/i2c.h>
19 #include "i2c-designware-core.h"
24 regmap_write(dev->map, DW_IC_TX_TL, 0); in i2c_dw_configure_fifo_slave()
25 regmap_write(dev->map, DW_IC_RX_TL, 0); in i2c_dw_configure_fifo_slave()
27 /* Configure the I2C slave. */ in i2c_dw_configure_fifo_slave()
28 regmap_write(dev->map, DW_IC_CON, dev->slave_cfg); in i2c_dw_configure_fifo_slave()
29 regmap_write(dev->map, DW_IC_INTR_MASK, DW_IC_INTR_SLAVE_MASK); in i2c_dw_configure_fifo_slave()
33 * i2c_dw_init_slave() - Initialize the designware i2c slave hardware
36 * This function configures and enables the I2C in slave mode.
37 * This function is called during I2C init function, and in case of timeout at
52 if (dev->sda_hold_time) in i2c_dw_init_slave()
53 regmap_write(dev->map, DW_IC_SDA_HOLD, dev->sda_hold_time); in i2c_dw_init_slave()
63 struct dw_i2c_dev *dev = i2c_get_adapdata(slave->adapter); in i2c_dw_reg_slave()
65 if (dev->slave) in i2c_dw_reg_slave()
66 return -EBUSY; in i2c_dw_reg_slave()
67 if (slave->flags & I2C_CLIENT_TEN) in i2c_dw_reg_slave()
68 return -EAFNOSUPPORT; in i2c_dw_reg_slave()
69 pm_runtime_get_sync(dev->dev); in i2c_dw_reg_slave()
76 regmap_write(dev->map, DW_IC_SAR, slave->addr); in i2c_dw_reg_slave()
77 dev->slave = slave; in i2c_dw_reg_slave()
81 dev->cmd_err = 0; in i2c_dw_reg_slave()
82 dev->msg_write_idx = 0; in i2c_dw_reg_slave()
83 dev->msg_read_idx = 0; in i2c_dw_reg_slave()
84 dev->msg_err = 0; in i2c_dw_reg_slave()
85 dev->status = STATUS_IDLE; in i2c_dw_reg_slave()
86 dev->abort_source = 0; in i2c_dw_reg_slave()
87 dev->rx_outstanding = 0; in i2c_dw_reg_slave()
94 struct dw_i2c_dev *dev = i2c_get_adapdata(slave->adapter); in i2c_dw_unreg_slave()
96 dev->disable_int(dev); in i2c_dw_unreg_slave()
97 dev->disable(dev); in i2c_dw_unreg_slave()
98 synchronize_irq(dev->irq); in i2c_dw_unreg_slave()
99 dev->slave = NULL; in i2c_dw_unreg_slave()
100 pm_runtime_put(dev->dev); in i2c_dw_unreg_slave()
121 regmap_read(dev->map, DW_IC_INTR_STAT, &stat); in i2c_dw_read_clear_intrbits_slave()
128 * Instead, use the separately-prepared IC_CLR_* registers. in i2c_dw_read_clear_intrbits_slave()
131 regmap_read(dev->map, DW_IC_CLR_TX_ABRT, &dummy); in i2c_dw_read_clear_intrbits_slave()
133 regmap_read(dev->map, DW_IC_CLR_RX_UNDER, &dummy); in i2c_dw_read_clear_intrbits_slave()
135 regmap_read(dev->map, DW_IC_CLR_RX_OVER, &dummy); in i2c_dw_read_clear_intrbits_slave()
137 regmap_read(dev->map, DW_IC_CLR_TX_OVER, &dummy); in i2c_dw_read_clear_intrbits_slave()
139 regmap_read(dev->map, DW_IC_CLR_RX_DONE, &dummy); in i2c_dw_read_clear_intrbits_slave()
141 regmap_read(dev->map, DW_IC_CLR_ACTIVITY, &dummy); in i2c_dw_read_clear_intrbits_slave()
143 regmap_read(dev->map, DW_IC_CLR_STOP_DET, &dummy); in i2c_dw_read_clear_intrbits_slave()
145 regmap_read(dev->map, DW_IC_CLR_START_DET, &dummy); in i2c_dw_read_clear_intrbits_slave()
147 regmap_read(dev->map, DW_IC_CLR_GEN_CALL, &dummy); in i2c_dw_read_clear_intrbits_slave()
153 * Interrupt service routine. This gets called whenever an I2C slave interrupt
162 regmap_read(dev->map, DW_IC_ENABLE, &enabled); in i2c_dw_irq_handler_slave()
163 regmap_read(dev->map, DW_IC_RAW_INTR_STAT, &raw_stat); in i2c_dw_irq_handler_slave()
164 regmap_read(dev->map, DW_IC_STATUS, &tmp); in i2c_dw_irq_handler_slave()
167 if (!enabled || !(raw_stat & ~DW_IC_INTR_ACTIVITY) || !dev->slave) in i2c_dw_irq_handler_slave()
171 dev_dbg(dev->dev, in i2c_dw_irq_handler_slave()
176 if (dev->status != STATUS_WRITE_IN_PROGRESS) { in i2c_dw_irq_handler_slave()
177 dev->status = STATUS_WRITE_IN_PROGRESS; in i2c_dw_irq_handler_slave()
178 i2c_slave_event(dev->slave, I2C_SLAVE_WRITE_REQUESTED, in i2c_dw_irq_handler_slave()
182 regmap_read(dev->map, DW_IC_DATA_CMD, &tmp); in i2c_dw_irq_handler_slave()
184 if (!i2c_slave_event(dev->slave, I2C_SLAVE_WRITE_RECEIVED, in i2c_dw_irq_handler_slave()
186 dev_vdbg(dev->dev, "Byte %X acked!", val); in i2c_dw_irq_handler_slave()
191 regmap_read(dev->map, DW_IC_CLR_RD_REQ, &tmp); in i2c_dw_irq_handler_slave()
193 dev->status = STATUS_READ_IN_PROGRESS; in i2c_dw_irq_handler_slave()
194 if (!i2c_slave_event(dev->slave, in i2c_dw_irq_handler_slave()
197 regmap_write(dev->map, DW_IC_DATA_CMD, val); in i2c_dw_irq_handler_slave()
202 if (!i2c_slave_event(dev->slave, I2C_SLAVE_READ_PROCESSED, in i2c_dw_irq_handler_slave()
204 regmap_read(dev->map, DW_IC_CLR_RX_DONE, &tmp); in i2c_dw_irq_handler_slave()
208 dev->status = STATUS_IDLE; in i2c_dw_irq_handler_slave()
209 i2c_slave_event(dev->slave, I2C_SLAVE_STOP, &val); in i2c_dw_irq_handler_slave()
222 complete(&dev->cmd_complete); in i2c_dw_isr_slave()
235 dev->functionality = I2C_FUNC_SLAVE | DW_IC_DEFAULT_FUNCTIONALITY; in i2c_dw_configure_slave()
237 dev->slave_cfg = DW_IC_CON_RX_FIFO_FULL_HLD_CTRL | in i2c_dw_configure_slave()
240 dev->mode = DW_IC_SLAVE; in i2c_dw_configure_slave()
246 struct i2c_adapter *adap = &dev->adapter; in i2c_dw_probe_slave()
249 init_completion(&dev->cmd_complete); in i2c_dw_probe_slave()
251 dev->init = i2c_dw_init_slave; in i2c_dw_probe_slave()
252 dev->disable = i2c_dw_disable; in i2c_dw_probe_slave()
253 dev->disable_int = i2c_dw_disable_int; in i2c_dw_probe_slave()
267 ret = dev->init(dev); in i2c_dw_probe_slave()
271 snprintf(adap->name, sizeof(adap->name), in i2c_dw_probe_slave()
272 "Synopsys DesignWare I2C Slave adapter"); in i2c_dw_probe_slave()
273 adap->retries = 3; in i2c_dw_probe_slave()
274 adap->algo = &i2c_dw_algo; in i2c_dw_probe_slave()
275 adap->dev.parent = dev->dev; in i2c_dw_probe_slave()
278 ret = devm_request_irq(dev->dev, dev->irq, i2c_dw_isr_slave, in i2c_dw_probe_slave()
279 IRQF_SHARED, dev_name(dev->dev), dev); in i2c_dw_probe_slave()
281 dev_err(dev->dev, "failure requesting irq %i: %d\n", in i2c_dw_probe_slave()
282 dev->irq, ret); in i2c_dw_probe_slave()
288 dev_err(dev->dev, "failure adding adapter: %d\n", ret); in i2c_dw_probe_slave()
295 MODULE_DESCRIPTION("Synopsys DesignWare I2C bus slave adapter");