41 static int __nci_spi_send(struct nci_spi *nspi, struct sk_buff *skb,  in __nci_spi_send()  argument
49 	if (skb) {  in __nci_spi_send()
50 		t.tx_buf = skb->data;  in __nci_spi_send()
51 		t.len = skb->len;  in __nci_spi_send()
68 		 struct sk_buff *skb)  in nci_spi_send()  argument
70 	unsigned int payload_len = skb->len;  in nci_spi_send()
76 	hdr = skb_push(skb, NCI_SPI_HDR_LEN);  in nci_spi_send()
85 		crc = crc_ccitt(CRC_INIT, skb->data, skb->len);  in nci_spi_send()
86 		*skb_put(skb, 1) = crc >> 8;  in nci_spi_send()
87 		*skb_put(skb, 1) = crc & 0xFF;  in nci_spi_send()
104 	ret = __nci_spi_send(nspi, skb, 0);  in nci_spi_send()
117 	kfree_skb(skb);  in nci_spi_send()
156 	struct sk_buff *skb;  in send_acknowledge()  local
161 	skb = nci_skb_alloc(nspi->ndev, 0, GFP_KERNEL);  in send_acknowledge()
164 	hdr = skb_push(skb, NCI_SPI_HDR_LEN);  in send_acknowledge()
170 	crc = crc_ccitt(CRC_INIT, skb->data, skb->len);  in send_acknowledge()
171 	*skb_put(skb, 1) = crc >> 8;  in send_acknowledge()
172 	*skb_put(skb, 1) = crc & 0xFF;  in send_acknowledge()
174 	ret = __nci_spi_send(nspi, skb, 0);  in send_acknowledge()
176 	kfree_skb(skb);  in send_acknowledge()
183 	struct sk_buff *skb;  in __nci_spi_read()  local
216 	skb = nci_skb_alloc(nspi->ndev, rx_len, GFP_KERNEL);  in __nci_spi_read()
217 	if (!skb)  in __nci_spi_read()
223 	rx.rx_buf = skb_put(skb, rx_len);  in __nci_spi_read()
234 		*skb_push(skb, 1) = resp_hdr[1];  in __nci_spi_read()
235 		*skb_push(skb, 1) = resp_hdr[0];  in __nci_spi_read()
238 	return skb;  in __nci_spi_read()
241 	kfree_skb(skb);  in __nci_spi_read()
246 static int nci_spi_check_crc(struct sk_buff *skb)  in nci_spi_check_crc()  argument
248 	u16 crc_data = (skb->data[skb->len - 2] << 8) |  in nci_spi_check_crc()
249 			skb->data[skb->len - 1];  in nci_spi_check_crc()
252 	ret = (crc_ccitt(CRC_INIT, skb->data, skb->len - NCI_SPI_CRC_LEN)  in nci_spi_check_crc()
255 	skb_trim(skb, skb->len - NCI_SPI_CRC_LEN);  in nci_spi_check_crc()
260 static u8 nci_spi_get_ack(struct sk_buff *skb)  in nci_spi_get_ack()  argument
264 	ret = skb->data[0] >> NCI_SPI_ACK_SHIFT;  in nci_spi_get_ack()
267 	skb_pull(skb, 2);  in nci_spi_get_ack()
285 	struct sk_buff *skb;  in nci_spi_read()  local
288 	skb = __nci_spi_read(nspi);  in nci_spi_read()
289 	if (!skb)  in nci_spi_read()
293 		if (!nci_spi_check_crc(skb)) {  in nci_spi_read()
301 		nspi->req_result = nci_spi_get_ack(skb);  in nci_spi_read()
309 	if (!skb->len) {  in nci_spi_read()
310 		kfree_skb(skb);  in nci_spi_read()
311 		skb = NULL;  in nci_spi_read()
320 	return skb;  in nci_spi_read()