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authorWaldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>2013-04-03 08:02:13 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2013-04-11 16:29:07 +0200
commit53cf48399ad3b08c9115b4fce73dee0b6e726c91 (patch)
tree69048951e15fc273952de4c019f0f26c8a799bf8 /drivers
parent58520373d8aff974f4b3f1bd9eb84c1ff3d6bd8b (diff)
downloadlinux-53cf48399ad3b08c9115b4fce73dee0b6e726c91.tar.bz2
NFC: pn533: Add support for ACS ACR122U reader
ACS ACR122U is an USB NFC reader, PC/SC and CCID compilant, based on NXP PN532 chip. Internally, it's build of MCU, PN532 and an antenna. MCU makes the device CCID and PC/SC compilant and provide USB connection. In this achitecture, a host cannot talk directly to PN532 and must rely on MCU. Luckily, MCU exposes pseud-APDU through PC/SC Escape mechanism which let the host to transmit standard PN532 commands directly to PN532 chip with some limitations. The frame roughly looks like: CCID header | APDU header | PN532 header (pc_to_rdr_escape) | (pseudo apdu Direct Tramsmit) | (len, TFI, cmd, params) Accordign to limitations, ACR122U does't provide any mechanism to abort last issued command. Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/nfc/pn533.c219
1 files changed, 217 insertions, 2 deletions
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index 2fd8029f377d..697f154331ed 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -38,8 +38,12 @@
#define SONY_VENDOR_ID 0x054c
#define PASORI_PRODUCT_ID 0x02e1
-#define PN533_DEVICE_STD 0x1
-#define PN533_DEVICE_PASORI 0x2
+#define ACS_VENDOR_ID 0x072f
+#define ACR122U_PRODUCT_ID 0x2200
+
+#define PN533_DEVICE_STD 0x1
+#define PN533_DEVICE_PASORI 0x2
+#define PN533_DEVICE_ACR122U 0x3
#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
@@ -68,6 +72,11 @@ static const struct usb_device_id pn533_table[] = {
.idProduct = PASORI_PRODUCT_ID,
.driver_info = PN533_DEVICE_PASORI,
},
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
+ .idVendor = ACS_VENDOR_ID,
+ .idProduct = ACR122U_PRODUCT_ID,
+ .driver_info = PN533_DEVICE_ACR122U,
+ },
{ }
};
MODULE_DEVICE_TABLE(usb, pn533_table);
@@ -99,6 +108,21 @@ MODULE_DEVICE_TABLE(usb, pn533_table);
#define PN533_STD_FRAME_DIR_OUT 0xD4
#define PN533_STD_FRAME_DIR_IN 0xD5
+/* ACS ACR122 pn533 frame definitions */
+#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
+ + 2)
+#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
+#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
+ + 2)
+#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
+#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
+
+/* CCID messages types */
+#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
+#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
+
+#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
+
/* PN533 Commands */
#define PN533_STD_FRAME_CMD(f) (f->data[1])
@@ -394,6 +418,116 @@ struct pn533_frame_ops {
u8 (*get_cmd_code)(void *frame);
};
+struct pn533_acr122_ccid_hdr {
+ u8 type;
+ u32 datalen;
+ u8 slot;
+ u8 seq;
+ u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
+ byte for reposnse msg */
+ u8 data[]; /* payload */
+} __packed;
+
+struct pn533_acr122_apdu_hdr {
+ u8 class;
+ u8 ins;
+ u8 p1;
+ u8 p2;
+} __packed;
+
+struct pn533_acr122_tx_frame {
+ struct pn533_acr122_ccid_hdr ccid;
+ struct pn533_acr122_apdu_hdr apdu;
+ u8 datalen;
+ u8 data[]; /* pn533 frame: TFI ... */
+} __packed;
+
+struct pn533_acr122_rx_frame {
+ struct pn533_acr122_ccid_hdr ccid;
+ u8 data[]; /* pn533 frame : TFI ... */
+} __packed;
+
+static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
+{
+ struct pn533_acr122_tx_frame *frame = _frame;
+
+ frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
+ frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
+ sizeof(datalen) */
+ frame->ccid.slot = 0;
+ frame->ccid.seq = 0;
+ frame->ccid.params[0] = 0;
+ frame->ccid.params[1] = 0;
+ frame->ccid.params[2] = 0;
+
+ frame->data[0] = PN533_STD_FRAME_DIR_OUT;
+ frame->data[1] = cmd_code;
+ frame->datalen = 2; /* data[0] + data[1] */
+
+ frame->apdu.class = 0xFF;
+ frame->apdu.ins = 0;
+ frame->apdu.p1 = 0;
+ frame->apdu.p2 = 0;
+}
+
+static void pn533_acr122_tx_frame_finish(void *_frame)
+{
+ struct pn533_acr122_tx_frame *frame = _frame;
+
+ frame->ccid.datalen += frame->datalen;
+}
+
+static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
+{
+ struct pn533_acr122_tx_frame *frame = _frame;
+
+ frame->datalen += len;
+}
+
+static bool pn533_acr122_is_rx_frame_valid(void *_frame)
+{
+ struct pn533_acr122_rx_frame *frame = _frame;
+
+ if (frame->ccid.type != 0x83)
+ return false;
+
+ if (frame->data[frame->ccid.datalen - 2] == 0x63)
+ return false;
+
+ return true;
+}
+
+static int pn533_acr122_rx_frame_size(void *frame)
+{
+ struct pn533_acr122_rx_frame *f = frame;
+
+ /* f->ccid.datalen already includes tail length */
+ return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
+}
+
+static u8 pn533_acr122_get_cmd_code(void *frame)
+{
+ struct pn533_acr122_rx_frame *f = frame;
+
+ return PN533_STD_FRAME_CMD(f);
+}
+
+static struct pn533_frame_ops pn533_acr122_frame_ops = {
+ .tx_frame_init = pn533_acr122_tx_frame_init,
+ .tx_frame_finish = pn533_acr122_tx_frame_finish,
+ .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
+ .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
+ .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
+
+ .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
+ .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
+ .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
+ .rx_frame_size = pn533_acr122_rx_frame_size,
+
+ .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
+ .get_cmd_code = pn533_acr122_get_cmd_code,
+};
+
/* The rule: value + checksum = 0 */
static inline u8 pn533_std_checksum(u8 value)
{
@@ -2335,6 +2469,72 @@ static int pn533_pasori_fw_reset(struct pn533 *dev)
return 0;
}
+struct pn533_acr122_poweron_rdr_arg {
+ int rc;
+ struct completion done;
+};
+
+static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
+{
+ struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
+
+ nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
+
+ print_hex_dump(KERN_ERR, "ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
+ urb->transfer_buffer, urb->transfer_buffer_length,
+ false);
+
+ arg->rc = urb->status;
+ complete(&arg->done);
+}
+
+static int pn533_acr122_poweron_rdr(struct pn533 *dev)
+{
+ /* Power on th reader (CCID cmd) */
+ u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
+ 0, 0, 0, 0, 0, 0, 3, 0, 0};
+ u8 buf[255];
+ int rc;
+ void *cntx;
+ struct pn533_acr122_poweron_rdr_arg arg;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ init_completion(&arg.done);
+ cntx = dev->in_urb->context; /* backup context */
+
+ dev->in_urb->transfer_buffer = buf;
+ dev->in_urb->transfer_buffer_length = 255;
+ dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
+ dev->in_urb->context = &arg;
+
+ dev->out_urb->transfer_buffer = cmd;
+ dev->out_urb->transfer_buffer_length = sizeof(cmd);
+
+ print_hex_dump(KERN_ERR, "ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
+ cmd, sizeof(cmd), false);
+
+ rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev,
+ "Reader power on cmd error %d", rc);
+ return rc;
+ }
+
+ rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev,
+ "Can't submit for reader power on cmd response %d",
+ rc);
+ return rc;
+ }
+
+ wait_for_completion(&arg.done);
+ dev->in_urb->context = cntx; /* restore context */
+
+ return arg.rc;
+}
+
static struct nfc_ops pn533_nfc_ops = {
.dev_up = NULL,
.dev_down = NULL,
@@ -2369,6 +2569,7 @@ static int pn533_setup(struct pn533 *dev)
break;
case PN533_DEVICE_PASORI:
+ case PN533_DEVICE_ACR122U:
max_retries.mx_rty_atr = 0x2;
max_retries.mx_rty_psl = 0x1;
max_retries.mx_rty_passive_act =
@@ -2510,6 +2711,20 @@ static int pn533_probe(struct usb_interface *interface,
protocols = PN533_NO_TYPE_B_PROTOCOLS;
break;
+ case PN533_DEVICE_ACR122U:
+ protocols = PN533_NO_TYPE_B_PROTOCOLS;
+ dev->ops = &pn533_acr122_frame_ops;
+ dev->protocol_type = PN533_PROTO_REQ_RESP,
+
+ rc = pn533_acr122_poweron_rdr(dev);
+ if (rc < 0) {
+ nfc_dev_err(&dev->interface->dev,
+ "Couldn't poweron the reader (error %d)",
+ rc);
+ goto destroy_wq;
+ }
+ break;
+
default:
nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
dev->device_type);