26  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
47  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
76  * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
86  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
107  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
125 #include "xgbe-common.h"
154 	while (wait--) {  in xgbe_i2c_abort()
161 	return -EBUSY;  in xgbe_i2c_abort()
169 	while (wait--) {  in xgbe_i2c_set_enable()
177 	return -EBUSY;  in xgbe_i2c_set_enable()
220 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_write()
225 	tx_slots = pdata->i2c.tx_fifo_size - XI2C_IOREAD(pdata, IC_TXFLR);  in xgbe_i2c_write()
226 	while (tx_slots && state->tx_len) {  in xgbe_i2c_write()
227 		if (state->op->cmd == XGBE_I2C_CMD_READ)  in xgbe_i2c_write()
230 			cmd = *state->tx_buf++;  in xgbe_i2c_write()
232 		if (state->tx_len == 1)  in xgbe_i2c_write()
237 		tx_slots--;  in xgbe_i2c_write()
238 		state->tx_len--;  in xgbe_i2c_write()
241 	/* No more Tx operations, so ignore TX_EMPTY and return */  in xgbe_i2c_write()
242 	if (!state->tx_len)  in xgbe_i2c_write()
248 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_read()
252 	if (state->op->cmd != XGBE_I2C_CMD_READ)  in xgbe_i2c_read()
256 	while (rx_slots && state->rx_len) {  in xgbe_i2c_read()
257 		*state->rx_buf++ = XI2C_IOREAD(pdata, IC_DATA_CMD);  in xgbe_i2c_read()
258 		state->rx_len--;  in xgbe_i2c_read()
259 		rx_slots--;  in xgbe_i2c_read()
266 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_clear_isr_interrupts()
269 		state->tx_abort_source = XI2C_IOREAD(pdata, IC_TX_ABRT_SOURCE);  in xgbe_i2c_clear_isr_interrupts()
280 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_isr_task()
287 	netif_dbg(pdata, intr, pdata->netdev,  in xgbe_i2c_isr_task()
293 		netif_dbg(pdata, link, pdata->netdev,  in xgbe_i2c_isr_task()
295 			  state->tx_abort_source, state->op->target);  in xgbe_i2c_isr_task()
299 		state->ret = -EIO;  in xgbe_i2c_isr_task()
311 	if (state->ret || XI2C_GET_BITS(isr, IC_RAW_INTR_STAT, STOP_DET))  in xgbe_i2c_isr_task()
312 		complete(&pdata->i2c_complete);  in xgbe_i2c_isr_task()
316 	if (pdata->vdata->irq_reissue_support)  in xgbe_i2c_isr_task()
324 	if (pdata->isr_as_tasklet)  in xgbe_i2c_isr()
325 		tasklet_schedule(&pdata->tasklet_i2c);  in xgbe_i2c_isr()
327 		xgbe_i2c_isr_task(&pdata->tasklet_i2c);  in xgbe_i2c_isr()
347 	struct xgbe_i2c *i2c = &pdata->i2c;  in xgbe_i2c_get_features()
351 	i2c->max_speed_mode = XI2C_GET_BITS(reg, IC_COMP_PARAM_1,  in xgbe_i2c_get_features()
353 	i2c->rx_fifo_size = XI2C_GET_BITS(reg, IC_COMP_PARAM_1,  in xgbe_i2c_get_features()
355 	i2c->tx_fifo_size = XI2C_GET_BITS(reg, IC_COMP_PARAM_1,  in xgbe_i2c_get_features()
359 		dev_dbg(pdata->dev, "I2C features: %s=%u, %s=%u, %s=%u\n",  in xgbe_i2c_get_features()
360 			"MAX_SPEED_MODE", i2c->max_speed_mode,  in xgbe_i2c_get_features()
361 			"RX_BUFFER_DEPTH", i2c->rx_fifo_size,  in xgbe_i2c_get_features()
362 			"TX_BUFFER_DEPTH", i2c->tx_fifo_size);  in xgbe_i2c_get_features()
372 	xgbe_i2c_isr_task(&pdata->tasklet_i2c);  in xgbe_i2c_combined_isr()
379 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_xfer()
382 	mutex_lock(&pdata->i2c_mutex);  in xgbe_i2c_xfer()
384 	reinit_completion(&pdata->i2c_complete);  in xgbe_i2c_xfer()
388 		netdev_err(pdata->netdev, "failed to disable i2c master\n");  in xgbe_i2c_xfer()
392 	xgbe_i2c_set_target(pdata, op->target);  in xgbe_i2c_xfer()
395 	state->op = op;  in xgbe_i2c_xfer()
396 	state->tx_len = op->len;  in xgbe_i2c_xfer()
397 	state->tx_buf = op->buf;  in xgbe_i2c_xfer()
398 	state->rx_len = op->len;  in xgbe_i2c_xfer()
399 	state->rx_buf = op->buf;  in xgbe_i2c_xfer()
404 		netdev_err(pdata->netdev, "failed to enable i2c master\n");  in xgbe_i2c_xfer()
413 	if (!wait_for_completion_timeout(&pdata->i2c_complete, HZ)) {  in xgbe_i2c_xfer()
414 		netdev_err(pdata->netdev, "i2c operation timed out\n");  in xgbe_i2c_xfer()
415 		ret = -ETIMEDOUT;  in xgbe_i2c_xfer()
419 	ret = state->ret;  in xgbe_i2c_xfer()
421 		if (state->tx_abort_source & IC_TX_ABRT_7B_ADDR_NOACK)  in xgbe_i2c_xfer()
422 			ret = -ENOTCONN;  in xgbe_i2c_xfer()
423 		else if (state->tx_abort_source & IC_TX_ABRT_ARB_LOST)  in xgbe_i2c_xfer()
424 			ret = -EAGAIN;  in xgbe_i2c_xfer()
432 	mutex_unlock(&pdata->i2c_mutex);  in xgbe_i2c_xfer()
439 	if (!pdata->i2c.started)  in xgbe_i2c_stop()
442 	netif_dbg(pdata, link, pdata->netdev, "stopping I2C\n");  in xgbe_i2c_stop()
444 	pdata->i2c.started = 0;  in xgbe_i2c_stop()
450 	if (pdata->dev_irq != pdata->i2c_irq) {  in xgbe_i2c_stop()
451 		devm_free_irq(pdata->dev, pdata->i2c_irq, pdata);  in xgbe_i2c_stop()
452 		tasklet_kill(&pdata->tasklet_i2c);  in xgbe_i2c_stop()
460 	if (pdata->i2c.started)  in xgbe_i2c_start()
463 	netif_dbg(pdata, link, pdata->netdev, "starting I2C\n");  in xgbe_i2c_start()
466 	if (pdata->dev_irq != pdata->i2c_irq) {  in xgbe_i2c_start()
467 		tasklet_setup(&pdata->tasklet_i2c, xgbe_i2c_isr_task);  in xgbe_i2c_start()
469 		ret = devm_request_irq(pdata->dev, pdata->i2c_irq,  in xgbe_i2c_start()
470 				       xgbe_i2c_isr, 0, pdata->i2c_name,  in xgbe_i2c_start()
473 			netdev_err(pdata->netdev, "i2c irq request failed\n");  in xgbe_i2c_start()
478 	pdata->i2c.started = 1;  in xgbe_i2c_start()
491 		dev_err(pdata->dev, "failed to disable i2c master\n");  in xgbe_i2c_init()
506 	i2c_if->i2c_init		= xgbe_i2c_init;  in xgbe_init_function_ptrs_i2c()
508 	i2c_if->i2c_start		= xgbe_i2c_start;  in xgbe_init_function_ptrs_i2c()
509 	i2c_if->i2c_stop		= xgbe_i2c_stop;  in xgbe_init_function_ptrs_i2c()
511 	i2c_if->i2c_xfer		= xgbe_i2c_xfer;  in xgbe_init_function_ptrs_i2c()
513 	i2c_if->i2c_isr			= xgbe_i2c_combined_isr;  in xgbe_init_function_ptrs_i2c()