2  * Marvell NFC-over-I2C driver: I2C interface related functions
11  * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
21 #include <linux/i2c.h>
23 #include <linux/nfc.h>
28 #include <net/nfc/nci.h>
29 #include <net/nfc/nci_core.h>
35 	struct i2c_client *i2c;  member
46 	ret = i2c_master_recv(drv_data->i2c, (u8 *)&nci_hdr, NCI_CTRL_HDR_SIZE);  in nfcmrvl_i2c_read()
48 		nfc_err(&drv_data->i2c->dev, "cannot read NCI header\n");  in nfcmrvl_i2c_read()
49 		return -EBADMSG;  in nfcmrvl_i2c_read()
53 		nfc_err(&drv_data->i2c->dev, "invalid packet payload size\n");  in nfcmrvl_i2c_read()
54 		return -EBADMSG;  in nfcmrvl_i2c_read()
57 	*skb = nci_skb_alloc(drv_data->priv->ndev,  in nfcmrvl_i2c_read()
60 		return -ENOMEM;  in nfcmrvl_i2c_read()
67 		ret = i2c_master_recv(drv_data->i2c,  in nfcmrvl_i2c_read()
72 			nfc_err(&drv_data->i2c->dev,  in nfcmrvl_i2c_read()
76 			return -EBADMSG;  in nfcmrvl_i2c_read()
89 	if (!drv_data->priv)  in nfcmrvl_i2c_int_irq_thread_fn()
92 	if (test_bit(NFCMRVL_PHY_ERROR, &drv_data->priv->flags))  in nfcmrvl_i2c_int_irq_thread_fn()
98 	case -EREMOTEIO:  in nfcmrvl_i2c_int_irq_thread_fn()
99 		set_bit(NFCMRVL_PHY_ERROR, &drv_data->priv->flags);  in nfcmrvl_i2c_int_irq_thread_fn()
101 	case -ENOMEM:  in nfcmrvl_i2c_int_irq_thread_fn()
102 	case -EBADMSG:  in nfcmrvl_i2c_int_irq_thread_fn()
103 		nfc_err(&drv_data->i2c->dev, "read failed %d\n", ret);  in nfcmrvl_i2c_int_irq_thread_fn()
106 		if (nfcmrvl_nci_recv_frame(drv_data->priv, skb) < 0)  in nfcmrvl_i2c_int_irq_thread_fn()
107 			nfc_err(&drv_data->i2c->dev, "corrupted RX packet\n");  in nfcmrvl_i2c_int_irq_thread_fn()
115 	struct nfcmrvl_i2c_drv_data *drv_data = priv->drv_data;  in nfcmrvl_i2c_nci_open()
118 		return -ENODEV;  in nfcmrvl_i2c_nci_open()
131 	struct nfcmrvl_i2c_drv_data *drv_data = priv->drv_data;  in nfcmrvl_i2c_nci_send()
134 	if (test_bit(NFCMRVL_PHY_ERROR, &priv->flags))  in nfcmrvl_i2c_nci_send()
135 		return -EREMOTEIO;  in nfcmrvl_i2c_nci_send()
137 	ret = i2c_master_send(drv_data->i2c, skb->data, skb->len);  in nfcmrvl_i2c_nci_send()
140 	if (ret == -EREMOTEIO) {  in nfcmrvl_i2c_nci_send()
141 		nfc_info(drv_data->dev, "chip may sleep, retry\n");  in nfcmrvl_i2c_nci_send()
143 		ret = i2c_master_send(drv_data->i2c, skb->data, skb->len);  in nfcmrvl_i2c_nci_send()
147 		if (ret != skb->len) {  in nfcmrvl_i2c_nci_send()
148 			nfc_err(drv_data->dev,  in nfcmrvl_i2c_nci_send()
150 				ret, skb->len);  in nfcmrvl_i2c_nci_send()
151 			ret = -EREMOTEIO;  in nfcmrvl_i2c_nci_send()
188 	if (of_find_property(node, "i2c-int-falling", NULL))  in nfcmrvl_i2c_parse_dt()
189 		pdata->irq_polarity = IRQF_TRIGGER_FALLING;  in nfcmrvl_i2c_parse_dt()
191 		pdata->irq_polarity = IRQF_TRIGGER_RISING;  in nfcmrvl_i2c_parse_dt()
196 		return -EINVAL;  in nfcmrvl_i2c_parse_dt()
198 	pdata->irq = ret;  in nfcmrvl_i2c_parse_dt()
211 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {  in nfcmrvl_i2c_probe()
212 		nfc_err(&client->dev, "Need I2C_FUNC_I2C\n");  in nfcmrvl_i2c_probe()
213 		return -ENODEV;  in nfcmrvl_i2c_probe()
216 	drv_data = devm_kzalloc(&client->dev, sizeof(*drv_data), GFP_KERNEL);  in nfcmrvl_i2c_probe()
218 		return -ENOMEM;  in nfcmrvl_i2c_probe()
220 	drv_data->i2c = client;  in nfcmrvl_i2c_probe()
221 	drv_data->dev = &client->dev;  in nfcmrvl_i2c_probe()
222 	drv_data->priv = NULL;  in nfcmrvl_i2c_probe()
226 	pdata = client->dev.platform_data;  in nfcmrvl_i2c_probe()
228 	if (!pdata && client->dev.of_node)  in nfcmrvl_i2c_probe()
229 		if (nfcmrvl_i2c_parse_dt(client->dev.of_node, &config) == 0)  in nfcmrvl_i2c_probe()
233 		return -EINVAL;  in nfcmrvl_i2c_probe()
236 	ret = devm_request_threaded_irq(&drv_data->i2c->dev, pdata->irq,  in nfcmrvl_i2c_probe()
238 					pdata->irq_polarity | IRQF_ONESHOT,  in nfcmrvl_i2c_probe()
241 		nfc_err(&drv_data->i2c->dev,  in nfcmrvl_i2c_probe()
246 	drv_data->priv = nfcmrvl_nci_register_dev(NFCMRVL_PHY_I2C,  in nfcmrvl_i2c_probe()
248 						  &drv_data->i2c->dev, pdata);  in nfcmrvl_i2c_probe()
250 	if (IS_ERR(drv_data->priv))  in nfcmrvl_i2c_probe()
251 		return PTR_ERR(drv_data->priv);  in nfcmrvl_i2c_probe()
253 	drv_data->priv->support_fw_dnld = true;  in nfcmrvl_i2c_probe()
262 	nfcmrvl_nci_unregister_dev(drv_data->priv);  in nfcmrvl_i2c_remove()
269 	{ .compatible = "marvell,nfc-i2c", },
278 MODULE_DEVICE_TABLE(i2c, nfcmrvl_i2c_id_table);
293 MODULE_DESCRIPTION("Marvell NFC-over-I2C driver");