2  * Marvell NFC-over-SPI driver: SPI 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
28 #include <linux/spi/spi.h>
35 	struct spi_device *spi;  member
50 	if (test_and_clear_bit(SPI_WAIT_HANDSHAKE, &drv_data->flags)) {  in nfcmrvl_spi_int_irq_thread_fn()
51 		complete(&drv_data->handshake_completion);  in nfcmrvl_spi_int_irq_thread_fn()
55 	/* Normal case, SPI_INT deasserted by slave to trigger a master read */  in nfcmrvl_spi_int_irq_thread_fn()
57 	skb = nci_spi_read(drv_data->nci_spi);  in nfcmrvl_spi_int_irq_thread_fn()
59 		nfc_err(&drv_data->spi->dev, "failed to read spi packet");  in nfcmrvl_spi_int_irq_thread_fn()
63 	if (nfcmrvl_nci_recv_frame(drv_data->priv, skb) < 0)  in nfcmrvl_spi_int_irq_thread_fn()
64 		nfc_err(&drv_data->spi->dev, "corrupted RX packet");  in nfcmrvl_spi_int_irq_thread_fn()
82 	struct nfcmrvl_spi_drv_data *drv_data = priv->drv_data;  in nfcmrvl_spi_nci_send()
85 	/* Reinit completion for slave handshake */  in nfcmrvl_spi_nci_send()
86 	reinit_completion(&drv_data->handshake_completion);  in nfcmrvl_spi_nci_send()
87 	set_bit(SPI_WAIT_HANDSHAKE, &drv_data->flags);  in nfcmrvl_spi_nci_send()
90 	 * Append a dummy byte at the end of SPI frame. This is due to a  in nfcmrvl_spi_nci_send()
95 	/* Send the SPI packet */  in nfcmrvl_spi_nci_send()
96 	err = nci_spi_send(drv_data->nci_spi, &drv_data->handshake_completion,  in nfcmrvl_spi_nci_send()
99 		nfc_err(priv->dev, "spi_send failed %d", err);  in nfcmrvl_spi_nci_send()
107 	struct nfcmrvl_spi_drv_data *drv_data = priv->drv_data;  in nfcmrvl_spi_nci_update_config()
110 	drv_data->nci_spi->xfer_speed_hz = config->clk;  in nfcmrvl_spi_nci_update_config()
136 	pdata->irq = ret;  in nfcmrvl_spi_parse_dt()
141 static int nfcmrvl_spi_probe(struct spi_device *spi)  in nfcmrvl_spi_probe()  argument
148 	drv_data = devm_kzalloc(&spi->dev, sizeof(*drv_data), GFP_KERNEL);  in nfcmrvl_spi_probe()
150 		return -ENOMEM;  in nfcmrvl_spi_probe()
152 	drv_data->spi = spi;  in nfcmrvl_spi_probe()
153 	drv_data->priv = NULL;  in nfcmrvl_spi_probe()
154 	spi_set_drvdata(spi, drv_data);  in nfcmrvl_spi_probe()
156 	pdata = spi->dev.platform_data;  in nfcmrvl_spi_probe()
158 	if (!pdata && spi->dev.of_node)  in nfcmrvl_spi_probe()
159 		if (nfcmrvl_spi_parse_dt(spi->dev.of_node, &config) == 0)  in nfcmrvl_spi_probe()
163 		return -EINVAL;  in nfcmrvl_spi_probe()
165 	ret = devm_request_threaded_irq(&drv_data->spi->dev, pdata->irq,  in nfcmrvl_spi_probe()
170 		nfc_err(&drv_data->spi->dev, "Unable to register IRQ handler");  in nfcmrvl_spi_probe()
171 		return -ENODEV;  in nfcmrvl_spi_probe()
174 	drv_data->priv = nfcmrvl_nci_register_dev(NFCMRVL_PHY_SPI,  in nfcmrvl_spi_probe()
176 						  &drv_data->spi->dev,  in nfcmrvl_spi_probe()
178 	if (IS_ERR(drv_data->priv))  in nfcmrvl_spi_probe()
179 		return PTR_ERR(drv_data->priv);  in nfcmrvl_spi_probe()
181 	drv_data->priv->support_fw_dnld = true;  in nfcmrvl_spi_probe()
183 	drv_data->nci_spi = nci_spi_allocate_spi(drv_data->spi, 0, 10,  in nfcmrvl_spi_probe()
184 						 drv_data->priv->ndev);  in nfcmrvl_spi_probe()
186 	/* Init completion for slave handshake */  in nfcmrvl_spi_probe()
187 	init_completion(&drv_data->handshake_completion);  in nfcmrvl_spi_probe()
191 static int nfcmrvl_spi_remove(struct spi_device *spi)  in nfcmrvl_spi_remove()  argument
193 	struct nfcmrvl_spi_drv_data *drv_data = spi_get_drvdata(spi);  in nfcmrvl_spi_remove()
195 	nfcmrvl_nci_unregister_dev(drv_data->priv);  in nfcmrvl_spi_remove()
200 	{ .compatible = "marvell,nfc-spi", },
209 MODULE_DEVICE_TABLE(spi, nfcmrvl_spi_id_table);
225 MODULE_DESCRIPTION("Marvell NFC-over-SPI driver");