100 #define I2C_DUMP_SKB(info, skb)					\  argument
104 		       16, 1, (skb)->data, (skb)->len, 0);	\
175 static void st21nfca_hci_add_len_crc(struct sk_buff *skb)  in st21nfca_hci_add_len_crc()  argument
180 	*skb_push(skb, 1) = 0;  in st21nfca_hci_add_len_crc()
182 	crc = crc_ccitt(0xffff, skb->data, skb->len);  in st21nfca_hci_add_len_crc()
186 	*skb_put(skb, 1) = tmp;  in st21nfca_hci_add_len_crc()
189 	*skb_put(skb, 1) = tmp;  in st21nfca_hci_add_len_crc()
192 static void st21nfca_hci_remove_len_crc(struct sk_buff *skb)  in st21nfca_hci_remove_len_crc()  argument
194 	skb_pull(skb, ST21NFCA_FRAME_HEADROOM);  in st21nfca_hci_remove_len_crc()
195 	skb_trim(skb, skb->len - ST21NFCA_FRAME_TAILROOM);  in st21nfca_hci_remove_len_crc()
203 static int st21nfca_hci_i2c_write(void *phy_id, struct sk_buff *skb)  in st21nfca_hci_i2c_write()  argument
210 	I2C_DUMP_SKB("st21nfca_hci_i2c_write", skb);  in st21nfca_hci_i2c_write()
221 	st21nfca_hci_add_len_crc(skb);  in st21nfca_hci_i2c_write()
224 	*skb_put(skb, 1) = ST21NFCA_SOF_EOF;  in st21nfca_hci_i2c_write()
226 	*skb_push(skb, 1) = ST21NFCA_SOF_EOF;  in st21nfca_hci_i2c_write()
234 	tmp[0] = skb->data[0];  in st21nfca_hci_i2c_write()
235 	for (i = 1, j = 1; i < skb->len - 1; i++, j++) {  in st21nfca_hci_i2c_write()
236 		if (skb->data[i] == ST21NFCA_SOF_EOF  in st21nfca_hci_i2c_write()
237 		    || skb->data[i] == ST21NFCA_ESCAPE_BYTE_STUFFING) {  in st21nfca_hci_i2c_write()
240 			tmp[j] = skb->data[i] ^ ST21NFCA_BYTE_STUFFING_MASK;  in st21nfca_hci_i2c_write()
242 			tmp[j] = skb->data[i];  in st21nfca_hci_i2c_write()
245 	tmp[j] = skb->data[i];  in st21nfca_hci_i2c_write()
267 	st21nfca_hci_remove_len_crc(skb);  in st21nfca_hci_i2c_write()
313 static int st21nfca_hci_i2c_repack(struct sk_buff *skb)  in st21nfca_hci_i2c_repack()  argument
317 	if (skb->len < 1 || (skb->len > 1 && skb->data[1] != 0))  in st21nfca_hci_i2c_repack()
320 	size = get_frame_size(skb->data, skb->len);  in st21nfca_hci_i2c_repack()
322 		skb_trim(skb, size);  in st21nfca_hci_i2c_repack()
324 		for (i = 1, j = 0; i < skb->len; i++) {  in st21nfca_hci_i2c_repack()
325 			if (skb->data[i + j] ==  in st21nfca_hci_i2c_repack()
327 				skb->data[i] = skb->data[i + j + 1]  in st21nfca_hci_i2c_repack()
332 			skb->data[i] = skb->data[i + j];  in st21nfca_hci_i2c_repack()
335 		skb_trim(skb, i - j);  in st21nfca_hci_i2c_repack()
337 		skb_pull(skb, 1);  in st21nfca_hci_i2c_repack()
339 		r = check_crc(skb->data, skb->len);  in st21nfca_hci_i2c_repack()
346 		skb_pull(skb, 1);  in st21nfca_hci_i2c_repack()
348 		skb_trim(skb, skb->len - 2);  in st21nfca_hci_i2c_repack()
349 		return skb->len;  in st21nfca_hci_i2c_repack()
370 				 struct sk_buff *skb)  in st21nfca_hci_i2c_read()  argument
404 			skb_trim(skb, 0);  in st21nfca_hci_i2c_read()
413 			skb_trim(skb, 0);  in st21nfca_hci_i2c_read()
417 		memcpy(skb_put(skb, len), buf, len);  in st21nfca_hci_i2c_read()
419 		if (skb->data[skb->len - 1] == ST21NFCA_SOF_EOF) {  in st21nfca_hci_i2c_read()
421 			return st21nfca_hci_i2c_repack(skb);  in st21nfca_hci_i2c_read()