1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for the TI TPS23881 PoE PSE Controller driver (I2C bus)
16 #include <linux/pse-pd/pse.h>
94  * @param chan: The channel number (0-7).
114  * @param chan: The channel number (0-7).
141 	struct i2c_client *client = priv->client;  in tps23881_pi_set_pw_pol_limit()
146 	chan = priv->port[id].chan[0];  in tps23881_pi_set_pw_pol_limit()
167 	struct i2c_client *client = priv->client;  in tps23881_pi_enable_manual_pol()
180 	chan = priv->port[id].chan[0];  in tps23881_pi_enable_manual_pol()
188 	struct i2c_client *client = priv->client;  in tps23881_pi_enable()
194 		return -ERANGE;  in tps23881_pi_enable()
196 	chan = priv->port[id].chan[0];  in tps23881_pi_enable()
199 	if (priv->port[id].is_4p) {  in tps23881_pi_enable()
200 		chan = priv->port[id].chan[1];  in tps23881_pi_enable()
210 	chan = priv->port[id].chan[0];  in tps23881_pi_enable()
226 	struct i2c_client *client = priv->client;  in tps23881_pi_disable()
232 		return -ERANGE;  in tps23881_pi_disable()
234 	chan = priv->port[id].chan[0];  in tps23881_pi_disable()
237 	if (priv->port[id].is_4p) {  in tps23881_pi_disable()
238 		chan = priv->port[id].chan[1];  in tps23881_pi_disable()
254 	chan = priv->port[id].chan[0];  in tps23881_pi_disable()
269 	chan = priv->port[id].chan[0];  in tps23881_pi_disable()
273 	if (priv->port[id].is_4p) {  in tps23881_pi_disable()
274 		chan = priv->port[id].chan[1];  in tps23881_pi_disable()
286 	if (priv->port[id].pw_pol < 0)  in tps23881_pi_disable()
294 	return tps23881_pi_set_pw_pol_limit(priv, id, priv->port[id].pw_pol,  in tps23881_pi_disable()
295 					    priv->port[id].is_4p);  in tps23881_pi_disable()
303 	struct i2c_client *client = priv->client;  in tps23881_pi_get_admin_state()
313 	chan = priv->port[id].chan[0];  in tps23881_pi_get_admin_state()
317 	if (priv->port[id].is_4p) {  in tps23881_pi_get_admin_state()
318 		chan = priv->port[id].chan[1];  in tps23881_pi_get_admin_state()
325 		admin_state->c33_admin_state =  in tps23881_pi_get_admin_state()
328 		admin_state->c33_admin_state =  in tps23881_pi_get_admin_state()
339 	struct i2c_client *client = priv->client;  in tps23881_pi_get_pw_status()
349 	chan = priv->port[id].chan[0];  in tps23881_pi_get_pw_status()
353 	if (priv->port[id].is_4p) {  in tps23881_pi_get_pw_status()
354 		chan = priv->port[id].chan[1];  in tps23881_pi_get_pw_status()
361 		pw_status->c33_pw_status =  in tps23881_pi_get_pw_status()
364 		pw_status->c33_pw_status =  in tps23881_pi_get_pw_status()
373 	struct i2c_client *client = priv->client;  in tps23881_pi_get_voltage()
390 	struct i2c_client *client = priv->client;  in tps23881_pi_get_chan_current()
411 	struct i2c_client *client = priv->client;  in tps23881_pi_get_pw_class()
415 	chan = priv->port[id].chan[0];  in tps23881_pi_get_pw_class()
432 	ret = tps23881_pi_get_voltage(&priv->pcdev, id);  in tps23881_pi_get_actual_pw()
437 	chan = priv->port[id].chan[0];  in tps23881_pi_get_actual_pw()
443 	if (priv->port[id].is_4p) {  in tps23881_pi_get_actual_pw()
444 		chan = priv->port[id].chan[1];  in tps23881_pi_get_actual_pw()
460 	struct i2c_client *client = priv->client;  in tps23881_pi_get_pw_limit_chan()
479 	chan = priv->port[id].chan[0];  in tps23881_pi_get_pw_limit()
485 	if (priv->port[id].is_4p) {  in tps23881_pi_get_pw_limit()
486 		chan = priv->port[id].chan[1];  in tps23881_pi_get_pw_limit()
504 		dev_err(&priv->client->dev,  in tps23881_pi_set_pw_limit()
507 		return -ERANGE;  in tps23881_pi_set_pw_limit()
517 	priv->port[id].pw_pol = pw_pol;  in tps23881_pi_set_pw_limit()
519 					    priv->port[id].is_4p);  in tps23881_pi_set_pw_limit()
531 		return -ENOMEM;  in tps23881_pi_get_pw_limit_ranges()
533 	c33_pw_limit_ranges->min = TPS23881_MIN_PI_PW_LIMIT_MW;  in tps23881_pi_get_pw_limit_ranges()
534 	c33_pw_limit_ranges->max = MAX_PI_PW;  in tps23881_pi_get_pw_limit_ranges()
535 	pw_limit_ranges->c33_pw_limit_ranges = c33_pw_limit_ranges;  in tps23881_pi_get_pw_limit_ranges()
549 	if (!priv->np)  in tps23881_get_of_channels()
550 		return -EINVAL;  in tps23881_get_of_channels()
552 	channels_node = of_find_node_by_name(priv->np, "channels");  in tps23881_get_of_channels()
554 		return -EINVAL;  in tps23881_get_of_channels()
564 			ret = -EINVAL;  in tps23881_get_of_channels()
569 			dev_err(&priv->client->dev,  in tps23881_get_of_channels()
571 			ret = -EINVAL;  in tps23881_get_of_channels()
609 		if (pairset->np == chan_node[i])  in tps23881_match_channel()
613 	return -ENODEV;  in tps23881_match_channel()
640 	if (!pi->pairset[0].np)  in tps23881_match_port_matrix()
643 	ret = tps23881_match_channel(&pi->pairset[0], chan_node);  in tps23881_match_port_matrix()
649 		return -ENODEV;  in tps23881_match_port_matrix()
655 	if (!pi->pairset[1].np)  in tps23881_match_port_matrix()
658 	ret = tps23881_match_channel(&pi->pairset[1], chan_node);  in tps23881_match_port_matrix()
664 		return -ENODEV;  in tps23881_match_port_matrix()
668 		pr_err("tps23881: 4-pair PSE can only be set within the same 4 ports group");  in tps23881_match_port_matrix()
669 		return -ENODEV;  in tps23881_match_port_matrix()
705 	return -ENODEV;  in tps23881_get_unused_chan()
709  * specification of the tps23881. The device has two 4-ports groups and
710  * each 4-pair powered device has to be configured to use two consecutive
739 		/* 4-pair ports have to be configured with consecutive  in tps23881_sort_port_matrix()
780 			return -ENODEV;  in tps23881_sort_port_matrix()
795 			return -ENODEV;  in tps23881_sort_port_matrix()
800 			return -ENODEV;  in tps23881_sort_port_matrix()
821 	struct i2c_client *client = priv->client;  in tps23881_write_port_matrix()
833 			priv->port[pi_id].chan[0] = lgcl_chan;  in tps23881_write_port_matrix()
834 			priv->port[pi_id].exist = true;  in tps23881_write_port_matrix()
838 		priv->port[pi_id].pw_pol = -1;  in tps23881_write_port_matrix()
851 			priv->port[pi_id].is_4p = true;  in tps23881_write_port_matrix()
852 			priv->port[pi_id].chan[1] = lgcl_chan;  in tps23881_write_port_matrix()
867 	struct i2c_client *client = priv->client;  in tps23881_set_ports_conf()
919 	/* Update with values for every PSE PIs */  in tps23881_set_ports_matrix()
921 		ret = tps23881_match_port_matrix(&priv->pcdev.pi[i], i,  in tps23881_set_ports_matrix()
946 		dev_warn(&priv->client->dev,  in tps23881_setup_pi_matrix()
947 			 "Unable to parse port-matrix, default matrix will be used\n");  in tps23881_setup_pi_matrix()
960 	-ERANGE,
967 	-ERANGE,
974 	-ERANGE,
975 	-ERANGE,
981 	struct i2c_client *client = priv->client;  in tps23881_pi_get_pw_req()
986 	/* For a 4-pair the classification need 5ms to be completed */  in tps23881_pi_get_pw_req()
987 	if (priv->port[id].is_4p)  in tps23881_pi_get_pw_req()
990 	chan = priv->port[id].chan[0];  in tps23881_pi_get_pw_req()
1015 static const char fw_parity_name[] = "ti/tps23881/tps23881-parity-14.bin";
1016 static const char fw_sram_name[] = "ti/tps23881/tps23881-sram-14.bin";
1058 	ret = request_firmware(&fw, fw_name, &client->dev);  in tps23881_flash_sram_fw_part()
1062 	dev_dbg(&client->dev, "Flashing %s\n", fw_name);  in tps23881_flash_sram_fw_part()
1065 	while (fw_conf->reg) {  in tps23881_flash_sram_fw_part()
1066 		ret = i2c_smbus_write_byte_data(client, fw_conf->reg,  in tps23881_flash_sram_fw_part()
1067 						fw_conf->val);  in tps23881_flash_sram_fw_part()
1075 	for (i = 0; i < fw->size; i++) {  in tps23881_flash_sram_fw_part()
1078 						fw->data[i]);  in tps23881_flash_sram_fw_part()
1138 		if (!priv->port[i].exist)  in tps23881_set_notifs_helper()
1143 		chan = priv->port[i].chan[0];  in tps23881_set_notifs_helper()
1161 			if (!priv->port[i].exist)  in tps23881_irq_event_over_temp()
1189 	for_each_set_bit(i, notifs_mask, priv->pcdev.nr_lines) {  in tps23881_irq_event_over_current()
1190 		if (priv->port[i].pw_pol < 0)  in tps23881_irq_event_over_current()
1199 						   priv->port[i].pw_pol,  in tps23881_irq_event_over_current()
1200 						   priv->port[i].is_4p);  in tps23881_irq_event_over_current()
1233 		ret = i2c_smbus_read_word_data(priv->client, reg);  in tps23881_irq_event_detection()
1262 		ret = i2c_smbus_read_word_data(priv->client, reg);  in tps23881_irq_event_classification()
1283 	struct i2c_client *client = priv->client;  in tps23881_irq_event_handler()
1334 	struct i2c_client *client = priv->client;  in tps23881_irq_handler()
1347 			dev_err(&client->dev, "interrupt never freed");  in tps23881_irq_handler()
1348 			return -ETIMEDOUT;  in tps23881_irq_handler()
1371 	struct i2c_client *client = priv->client;  in tps23881_setup_irq()
1373 		.name = "tps23881-irq",  in tps23881_setup_irq()
1380 		dev_err(&client->dev, "interrupt is missing");  in tps23881_setup_irq()
1381 		return -EINVAL;  in tps23881_setup_irq()
1409 	return devm_pse_irq_helper(&priv->pcdev, irq, 0, &irq_desc);  in tps23881_setup_irq()
1414 	struct device *dev = &client->dev;  in tps23881_i2c_probe()
1420 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {  in tps23881_i2c_probe()
1422 		return -ENXIO;  in tps23881_i2c_probe()
1427 		return -ENOMEM;  in tps23881_i2c_probe()
1431 		return dev_err_probe(&client->dev, PTR_ERR(reset), "Failed to get reset GPIO\n");  in tps23881_i2c_probe()
1436 		gpiod_set_value_cansleep(reset, 0); /* De-assert reset */  in tps23881_i2c_probe()
1454 		return -ENXIO;  in tps23881_i2c_probe()
1465 	dev_info(&client->dev, "Firmware revision 0x%x\n", ret);  in tps23881_i2c_probe()
1477 	priv->client = client;  in tps23881_i2c_probe()
1479 	priv->np = dev->of_node;  in tps23881_i2c_probe()
1481 	priv->pcdev.owner = THIS_MODULE;  in tps23881_i2c_probe()
1482 	priv->pcdev.ops = &tps23881_ops;  in tps23881_i2c_probe()
1483 	priv->pcdev.dev = dev;  in tps23881_i2c_probe()
1484 	priv->pcdev.types = ETHTOOL_PSE_C33;  in tps23881_i2c_probe()
1485 	priv->pcdev.nr_lines = TPS23881_MAX_CHANS;  in tps23881_i2c_probe()
1486 	priv->pcdev.supp_budget_eval_strategies = PSE_BUDGET_EVAL_STRAT_STATIC;  in tps23881_i2c_probe()
1487 	ret = devm_pse_controller_register(dev, &priv->pcdev);  in tps23881_i2c_probe()
1490 				     "failed to register PSE controller\n");  in tps23881_i2c_probe()
1493 	ret = tps23881_setup_irq(priv, client->irq);  in tps23881_i2c_probe()
1523 MODULE_DESCRIPTION("TI TPS23881 PoE PSE Controller driver");