20 static void i2c_dw_configure_fifo_slave(struct dw_i2c_dev *dev)  in i2c_dw_configure_fifo_slave()  argument
23 	dw_writel(dev, 0, DW_IC_TX_TL);  in i2c_dw_configure_fifo_slave()
24 	dw_writel(dev, 0, DW_IC_RX_TL);  in i2c_dw_configure_fifo_slave()
27 	dw_writel(dev, dev->slave_cfg, DW_IC_CON);  in i2c_dw_configure_fifo_slave()
28 	dw_writel(dev, DW_IC_INTR_SLAVE_MASK, DW_IC_INTR_MASK);  in i2c_dw_configure_fifo_slave()
39 static int i2c_dw_init_slave(struct dw_i2c_dev *dev)  in i2c_dw_init_slave()  argument
43 	ret = i2c_dw_acquire_lock(dev);  in i2c_dw_init_slave()
48 	__i2c_dw_disable(dev);  in i2c_dw_init_slave()
51 	if (dev->sda_hold_time)  in i2c_dw_init_slave()
52 		dw_writel(dev, dev->sda_hold_time, DW_IC_SDA_HOLD);  in i2c_dw_init_slave()
54 	i2c_dw_configure_fifo_slave(dev);  in i2c_dw_init_slave()
55 	i2c_dw_release_lock(dev);  in i2c_dw_init_slave()
62 	struct dw_i2c_dev *dev = i2c_get_adapdata(slave->adapter);  in i2c_dw_reg_slave()  local
64 	if (dev->slave)  in i2c_dw_reg_slave()
68 	pm_runtime_get_sync(dev->dev);  in i2c_dw_reg_slave()
74 	__i2c_dw_disable_nowait(dev);  in i2c_dw_reg_slave()
75 	dw_writel(dev, slave->addr, DW_IC_SAR);  in i2c_dw_reg_slave()
76 	dev->slave = slave;  in i2c_dw_reg_slave()
78 	__i2c_dw_enable(dev);  in i2c_dw_reg_slave()
80 	dev->cmd_err = 0;  in i2c_dw_reg_slave()
81 	dev->msg_write_idx = 0;  in i2c_dw_reg_slave()
82 	dev->msg_read_idx = 0;  in i2c_dw_reg_slave()
83 	dev->msg_err = 0;  in i2c_dw_reg_slave()
84 	dev->status = STATUS_IDLE;  in i2c_dw_reg_slave()
85 	dev->abort_source = 0;  in i2c_dw_reg_slave()
86 	dev->rx_outstanding = 0;  in i2c_dw_reg_slave()
93 	struct dw_i2c_dev *dev = i2c_get_adapdata(slave->adapter);  in i2c_dw_unreg_slave()  local
95 	dev->disable_int(dev);  in i2c_dw_unreg_slave()
96 	dev->disable(dev);  in i2c_dw_unreg_slave()
97 	dev->slave = NULL;  in i2c_dw_unreg_slave()
98 	pm_runtime_put(dev->dev);  in i2c_dw_unreg_slave()
103 static u32 i2c_dw_read_clear_intrbits_slave(struct dw_i2c_dev *dev)  in i2c_dw_read_clear_intrbits_slave()  argument
119 	stat = dw_readl(dev, DW_IC_INTR_STAT);  in i2c_dw_read_clear_intrbits_slave()
129 		dw_readl(dev, DW_IC_CLR_TX_ABRT);  in i2c_dw_read_clear_intrbits_slave()
131 		dw_readl(dev, DW_IC_CLR_RX_UNDER);  in i2c_dw_read_clear_intrbits_slave()
133 		dw_readl(dev, DW_IC_CLR_RX_OVER);  in i2c_dw_read_clear_intrbits_slave()
135 		dw_readl(dev, DW_IC_CLR_TX_OVER);  in i2c_dw_read_clear_intrbits_slave()
137 		dw_readl(dev, DW_IC_CLR_RX_DONE);  in i2c_dw_read_clear_intrbits_slave()
139 		dw_readl(dev, DW_IC_CLR_ACTIVITY);  in i2c_dw_read_clear_intrbits_slave()
141 		dw_readl(dev, DW_IC_CLR_STOP_DET);  in i2c_dw_read_clear_intrbits_slave()
143 		dw_readl(dev, DW_IC_CLR_START_DET);  in i2c_dw_read_clear_intrbits_slave()
145 		dw_readl(dev, DW_IC_CLR_GEN_CALL);  in i2c_dw_read_clear_intrbits_slave()
155 static int i2c_dw_irq_handler_slave(struct dw_i2c_dev *dev)  in i2c_dw_irq_handler_slave()  argument
160 	stat = dw_readl(dev, DW_IC_INTR_STAT);  in i2c_dw_irq_handler_slave()
161 	enabled = dw_readl(dev, DW_IC_ENABLE);  in i2c_dw_irq_handler_slave()
162 	raw_stat = dw_readl(dev, DW_IC_RAW_INTR_STAT);  in i2c_dw_irq_handler_slave()
163 	slave_activity = ((dw_readl(dev, DW_IC_STATUS) &  in i2c_dw_irq_handler_slave()
166 	if (!enabled || !(raw_stat & ~DW_IC_INTR_ACTIVITY) || !dev->slave)  in i2c_dw_irq_handler_slave()
169 	dev_dbg(dev->dev,  in i2c_dw_irq_handler_slave()
174 		i2c_slave_event(dev->slave, I2C_SLAVE_WRITE_REQUESTED, &val);  in i2c_dw_irq_handler_slave()
179 				val = dw_readl(dev, DW_IC_DATA_CMD);  in i2c_dw_irq_handler_slave()
181 				if (!i2c_slave_event(dev->slave,  in i2c_dw_irq_handler_slave()
184 					dev_vdbg(dev->dev, "Byte %X acked!",  in i2c_dw_irq_handler_slave()
187 				dw_readl(dev, DW_IC_CLR_RD_REQ);  in i2c_dw_irq_handler_slave()
188 				stat = i2c_dw_read_clear_intrbits_slave(dev);  in i2c_dw_irq_handler_slave()
190 				dw_readl(dev, DW_IC_CLR_RD_REQ);  in i2c_dw_irq_handler_slave()
191 				dw_readl(dev, DW_IC_CLR_RX_UNDER);  in i2c_dw_irq_handler_slave()
192 				stat = i2c_dw_read_clear_intrbits_slave(dev);  in i2c_dw_irq_handler_slave()
194 			if (!i2c_slave_event(dev->slave,  in i2c_dw_irq_handler_slave()
197 				dw_writel(dev, val, DW_IC_DATA_CMD);  in i2c_dw_irq_handler_slave()
202 		if (!i2c_slave_event(dev->slave, I2C_SLAVE_READ_PROCESSED,  in i2c_dw_irq_handler_slave()
204 			dw_readl(dev, DW_IC_CLR_RX_DONE);  in i2c_dw_irq_handler_slave()
206 		i2c_slave_event(dev->slave, I2C_SLAVE_STOP, &val);  in i2c_dw_irq_handler_slave()
207 		stat = i2c_dw_read_clear_intrbits_slave(dev);  in i2c_dw_irq_handler_slave()
212 		val = dw_readl(dev, DW_IC_DATA_CMD);  in i2c_dw_irq_handler_slave()
213 		if (!i2c_slave_event(dev->slave, I2C_SLAVE_WRITE_RECEIVED,  in i2c_dw_irq_handler_slave()
215 			dev_vdbg(dev->dev, "Byte %X acked!", val);  in i2c_dw_irq_handler_slave()
217 		i2c_slave_event(dev->slave, I2C_SLAVE_STOP, &val);  in i2c_dw_irq_handler_slave()
218 		stat = i2c_dw_read_clear_intrbits_slave(dev);  in i2c_dw_irq_handler_slave()
226 	struct dw_i2c_dev *dev = dev_id;  in i2c_dw_isr_slave()  local
229 	i2c_dw_read_clear_intrbits_slave(dev);  in i2c_dw_isr_slave()
230 	ret = i2c_dw_irq_handler_slave(dev);  in i2c_dw_isr_slave()
232 		complete(&dev->cmd_complete);  in i2c_dw_isr_slave()
243 int i2c_dw_probe_slave(struct dw_i2c_dev *dev)  in i2c_dw_probe_slave()  argument
245 	struct i2c_adapter *adap = &dev->adapter;  in i2c_dw_probe_slave()
248 	init_completion(&dev->cmd_complete);  in i2c_dw_probe_slave()
250 	dev->init = i2c_dw_init_slave;  in i2c_dw_probe_slave()
251 	dev->disable = i2c_dw_disable;  in i2c_dw_probe_slave()
252 	dev->disable_int = i2c_dw_disable_int;  in i2c_dw_probe_slave()
254 	ret = i2c_dw_set_reg_access(dev);  in i2c_dw_probe_slave()
258 	ret = i2c_dw_set_sda_hold(dev);  in i2c_dw_probe_slave()
262 	ret = dev->init(dev);  in i2c_dw_probe_slave()
270 	adap->dev.parent = dev->dev;  in i2c_dw_probe_slave()
271 	i2c_set_adapdata(adap, dev);  in i2c_dw_probe_slave()
273 	ret = devm_request_irq(dev->dev, dev->irq, i2c_dw_isr_slave,  in i2c_dw_probe_slave()
274 			       IRQF_SHARED, dev_name(dev->dev), dev);  in i2c_dw_probe_slave()
276 		dev_err(dev->dev, "failure requesting irq %i: %d\n",  in i2c_dw_probe_slave()
277 			dev->irq, ret);  in i2c_dw_probe_slave()
283 		dev_err(dev->dev, "failure adding adapter: %d\n", ret);  in i2c_dw_probe_slave()