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kernel-ark/drivers/nfc/pn533.c
Waldemar Rymarkiewicz aada17ac70 NFC: pn533: Add a new pn533_send_cmd_async iface 
This is intendend to replace pn533_send_cmd_frame_async() which
requires from the caller to create a complete frame.

The new function constructs a frame and sends it out which hides the
frame logic and avoid code duplication.

The caller has to allocate skb and put its payload there, and finally
provide the skb together with a complete cb to pn533_send_cmd_async().

Response skb is allocated by the core part and pass to the caller cb.
Next, the caller has to free it when is not needed anymore or pass it
up to the stack.

Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-01-10 00:44:28 +01:00

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/*
* Copyright (C) 2011 Instituto Nokia de Tecnologia
*
* Authors:
* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/nfc.h>
#include <linux/netdevice.h>
#include <net/nfc/nfc.h>
#define VERSION "0.1"
#define PN533_VENDOR_ID 0x4CC
#define PN533_PRODUCT_ID 0x2533
#define SCM_VENDOR_ID 0x4E6
#define SCL3711_PRODUCT_ID 0x5591
#define SONY_VENDOR_ID 0x054c
#define PASORI_PRODUCT_ID 0x02e1
#define PN533_DEVICE_STD 0x1
#define PN533_DEVICE_PASORI 0x2
#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
NFC_PROTO_NFC_DEP_MASK |\
NFC_PROTO_ISO14443_B_MASK)
#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
NFC_PROTO_MIFARE_MASK | \
NFC_PROTO_FELICA_MASK | \
NFC_PROTO_ISO14443_MASK | \
NFC_PROTO_NFC_DEP_MASK)
static const struct usb_device_id pn533_table[] = {
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = PN533_VENDOR_ID,
.idProduct = PN533_PRODUCT_ID,
.driver_info = PN533_DEVICE_STD,
},
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = SCM_VENDOR_ID,
.idProduct = SCL3711_PRODUCT_ID,
.driver_info = PN533_DEVICE_STD,
},
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = SONY_VENDOR_ID,
.idProduct = PASORI_PRODUCT_ID,
.driver_info = PN533_DEVICE_PASORI,
},
{ }
};
MODULE_DEVICE_TABLE(usb, pn533_table);
/* How much time we spend listening for initiators */
#define PN533_LISTEN_TIME 2
/* frame definitions */
#define PN533_NORMAL_FRAME_MAX_LEN 262 /* 6 (PREAMBLE, SOF, LEN, LCS, TFI)
254 (DATA)
2 (DCS, postamble) */
#define PN533_FRAME_HEADER_LEN (sizeof(struct pn533_frame) \
+ 2) /* data[0] TFI, data[1] CC */
#define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
PN533_FRAME_TAIL_LEN)
#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
/* start of frame */
#define PN533_SOF 0x00FF
/* frame identifier: in/out/error */
#define PN533_FRAME_IDENTIFIER(f) (f->data[0])
#define PN533_DIR_OUT 0xD4
#define PN533_DIR_IN 0xD5
/* PN533 Commands */
#define PN533_FRAME_CMD(f) (f->data[1])
#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
#define PN533_CMD_RF_CONFIGURATION 0x32
#define PN533_CMD_IN_DATA_EXCHANGE 0x40
#define PN533_CMD_IN_COMM_THRU 0x42
#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
#define PN533_CMD_IN_ATR 0x50
#define PN533_CMD_IN_RELEASE 0x52
#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
#define PN533_CMD_TG_GET_DATA 0x86
#define PN533_CMD_TG_SET_DATA 0x8e
#define PN533_CMD_UNDEF 0xff
#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
/* PN533 Return codes */
#define PN533_CMD_RET_MASK 0x3F
#define PN533_CMD_MI_MASK 0x40
#define PN533_CMD_RET_SUCCESS 0x00
struct pn533;
typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
u8 *params, int params_len);
typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
struct sk_buff *resp);
/* structs for pn533 commands */
/* PN533_CMD_GET_FIRMWARE_VERSION */
struct pn533_fw_version {
u8 ic;
u8 ver;
u8 rev;
u8 support;
};
/* PN533_CMD_RF_CONFIGURATION */
#define PN533_CFGITEM_TIMING 0x02
#define PN533_CFGITEM_MAX_RETRIES 0x05
#define PN533_CFGITEM_PASORI 0x82
#define PN533_CONFIG_TIMING_102 0xb
#define PN533_CONFIG_TIMING_204 0xc
#define PN533_CONFIG_TIMING_409 0xd
#define PN533_CONFIG_TIMING_819 0xe
#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
struct pn533_config_max_retries {
u8 mx_rty_atr;
u8 mx_rty_psl;
u8 mx_rty_passive_act;
} __packed;
struct pn533_config_timing {
u8 rfu;
u8 atr_res_timeout;
u8 dep_timeout;
} __packed;
/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
/* felica commands opcode */
#define PN533_FELICA_OPC_SENSF_REQ 0
#define PN533_FELICA_OPC_SENSF_RES 1
/* felica SENSF_REQ parameters */
#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
/* type B initiator_data values */
#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
union pn533_cmd_poll_initdata {
struct {
u8 afi;
u8 polling_method;
} __packed type_b;
struct {
u8 opcode;
__be16 sc;
u8 rc;
u8 tsn;
} __packed felica;
};
/* Poll modulations */
enum {
PN533_POLL_MOD_106KBPS_A,
PN533_POLL_MOD_212KBPS_FELICA,
PN533_POLL_MOD_424KBPS_FELICA,
PN533_POLL_MOD_106KBPS_JEWEL,
PN533_POLL_MOD_847KBPS_B,
PN533_LISTEN_MOD,
__PN533_POLL_MOD_AFTER_LAST,
};
#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
struct pn533_poll_modulations {
struct {
u8 maxtg;
u8 brty;
union pn533_cmd_poll_initdata initiator_data;
} __packed data;
u8 len;
};
const struct pn533_poll_modulations poll_mod[] = {
[PN533_POLL_MOD_106KBPS_A] = {
.data = {
.maxtg = 1,
.brty = 0,
},
.len = 2,
},
[PN533_POLL_MOD_212KBPS_FELICA] = {
.data = {
.maxtg = 1,
.brty = 1,
.initiator_data.felica = {
.opcode = PN533_FELICA_OPC_SENSF_REQ,
.sc = PN533_FELICA_SENSF_SC_ALL,
.rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
.tsn = 0,
},
},
.len = 7,
},
[PN533_POLL_MOD_424KBPS_FELICA] = {
.data = {
.maxtg = 1,
.brty = 2,
.initiator_data.felica = {
.opcode = PN533_FELICA_OPC_SENSF_REQ,
.sc = PN533_FELICA_SENSF_SC_ALL,
.rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
.tsn = 0,
},
},
.len = 7,
},
[PN533_POLL_MOD_106KBPS_JEWEL] = {
.data = {
.maxtg = 1,
.brty = 4,
},
.len = 2,
},
[PN533_POLL_MOD_847KBPS_B] = {
.data = {
.maxtg = 1,
.brty = 8,
.initiator_data.type_b = {
.afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
.polling_method =
PN533_TYPE_B_POLL_METHOD_TIMESLOT,
},
},
.len = 3,
},
[PN533_LISTEN_MOD] = {
.len = 0,
},
};
/* PN533_CMD_IN_ATR */
struct pn533_cmd_activate_param {
u8 tg;
u8 next;
} __packed;
struct pn533_cmd_activate_response {
u8 status;
u8 nfcid3t[10];
u8 didt;
u8 bst;
u8 brt;
u8 to;
u8 ppt;
/* optional */
u8 gt[];
} __packed;
/* PN533_CMD_IN_JUMP_FOR_DEP */
struct pn533_cmd_jump_dep {
u8 active;
u8 baud;
u8 next;
u8 data[];
} __packed;
struct pn533_cmd_jump_dep_response {
u8 status;
u8 tg;
u8 nfcid3t[10];
u8 didt;
u8 bst;
u8 brt;
u8 to;
u8 ppt;
/* optional */
u8 gt[];
} __packed;
/* PN533_TG_INIT_AS_TARGET */
#define PN533_INIT_TARGET_PASSIVE 0x1
#define PN533_INIT_TARGET_DEP 0x2
#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
#define PN533_INIT_TARGET_RESP_DEP 0x4
struct pn533_cmd_init_target {
u8 mode;
u8 mifare[6];
u8 felica[18];
u8 nfcid3[10];
u8 gb_len;
u8 gb[];
} __packed;
struct pn533_cmd_init_target_response {
u8 mode;
u8 cmd[];
} __packed;
struct pn533 {
struct usb_device *udev;
struct usb_interface *interface;
struct nfc_dev *nfc_dev;
struct urb *out_urb;
struct pn533_frame *out_frame;
struct urb *in_urb;
struct pn533_frame *in_frame;
struct sk_buff_head resp_q;
struct workqueue_struct *wq;
struct work_struct cmd_work;
struct work_struct cmd_complete_work;
struct work_struct poll_work;
struct work_struct mi_work;
struct work_struct tg_work;
struct timer_list listen_timer;
struct pn533_frame *wq_in_frame;
int wq_in_error;
int cancel_listen;
pn533_cmd_complete_t cmd_complete;
void *cmd_complete_arg;
struct mutex cmd_lock;
u8 cmd;
struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
u8 poll_mod_count;
u8 poll_mod_curr;
u32 poll_protocols;
u32 listen_protocols;
u8 *gb;
size_t gb_len;
u8 tgt_available_prots;
u8 tgt_active_prot;
u8 tgt_mode;
u32 device_type;
struct list_head cmd_queue;
u8 cmd_pending;
};
struct pn533_cmd {
struct list_head queue;
struct pn533_frame *out_frame;
struct pn533_frame *in_frame;
int in_frame_len;
u8 cmd_code;
struct sk_buff *req;
struct sk_buff *resp;
pn533_cmd_complete_t cmd_complete;
void *arg;
};
struct pn533_frame {
u8 preamble;
__be16 start_frame;
u8 datalen;
u8 datalen_checksum;
u8 data[];
} __packed;
/* The rule: value + checksum = 0 */
static inline u8 pn533_checksum(u8 value)
{
return ~value + 1;
}
/* The rule: sum(data elements) + checksum = 0 */
static u8 pn533_data_checksum(u8 *data, int datalen)
{
u8 sum = 0;
int i;
for (i = 0; i < datalen; i++)
sum += data[i];
return pn533_checksum(sum);
}
/**
* pn533_tx_frame_ack - create a ack frame
* @frame: The frame to be set as ack
*
* Ack is different type of standard frame. As a standard frame, it has
* preamble and start_frame. However the checksum of this frame must fail,
* i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
* fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
* After datalen_checksum field, the postamble is placed.
*/
static void pn533_tx_frame_ack(struct pn533_frame *frame)
{
frame->preamble = 0;
frame->start_frame = cpu_to_be16(PN533_SOF);
frame->datalen = 0;
frame->datalen_checksum = 0xFF;
/* data[0] is used as postamble */
frame->data[0] = 0;
}
static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
{
frame->preamble = 0;
frame->start_frame = cpu_to_be16(PN533_SOF);
PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
PN533_FRAME_CMD(frame) = cmd;
frame->datalen = 2;
}
static void pn533_tx_frame_finish(struct pn533_frame *frame)
{
frame->datalen_checksum = pn533_checksum(frame->datalen);
PN533_FRAME_CHECKSUM(frame) =
pn533_data_checksum(frame->data, frame->datalen);
PN533_FRAME_POSTAMBLE(frame) = 0;
}
static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
{
u8 checksum;
if (frame->start_frame != cpu_to_be16(PN533_SOF))
return false;
checksum = pn533_checksum(frame->datalen);
if (checksum != frame->datalen_checksum)
return false;
checksum = pn533_data_checksum(frame->data, frame->datalen);
if (checksum != PN533_FRAME_CHECKSUM(frame))
return false;
return true;
}
static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
{
if (frame->start_frame != cpu_to_be16(PN533_SOF))
return false;
if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
return false;
return true;
}
static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
{
return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
}
static void pn533_wq_cmd_complete(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
struct pn533_frame *in_frame;
int rc;
in_frame = dev->wq_in_frame;
if (dev->wq_in_error)
rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
dev->wq_in_error);
else
rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
PN533_FRAME_CMD_PARAMS_PTR(in_frame),
PN533_FRAME_CMD_PARAMS_LEN(in_frame));
if (rc != -EINPROGRESS)
queue_work(dev->wq, &dev->cmd_work);
}
static void pn533_recv_response(struct urb *urb)
{
struct pn533 *dev = urb->context;
struct pn533_frame *in_frame;
dev->wq_in_frame = NULL;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
" status: %d", urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
default:
nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
" %d", urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
}
in_frame = dev->in_urb->transfer_buffer;
if (!pn533_rx_frame_is_valid(in_frame)) {
nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
dev->wq_in_error = -EIO;
goto sched_wq;
}
if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
nfc_dev_err(&dev->interface->dev, "The received frame is not "
"response to the last command");
dev->wq_in_error = -EIO;
goto sched_wq;
}
nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
dev->wq_in_error = 0;
dev->wq_in_frame = in_frame;
sched_wq:
queue_work(dev->wq, &dev->cmd_complete_work);
}
static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
{
dev->in_urb->complete = pn533_recv_response;
return usb_submit_urb(dev->in_urb, flags);
}
static void pn533_recv_ack(struct urb *urb)
{
struct pn533 *dev = urb->context;
struct pn533_frame *in_frame;
int rc;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
" status: %d", urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
default:
nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
" %d", urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
}
in_frame = dev->in_urb->transfer_buffer;
if (!pn533_rx_frame_is_ack(in_frame)) {
nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
dev->wq_in_error = -EIO;
goto sched_wq;
}
nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
if (rc) {
nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
" result %d", rc);
dev->wq_in_error = rc;
goto sched_wq;
}
return;
sched_wq:
dev->wq_in_frame = NULL;
queue_work(dev->wq, &dev->cmd_complete_work);
}
static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
{
dev->in_urb->complete = pn533_recv_ack;
return usb_submit_urb(dev->in_urb, flags);
}
static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
{
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
pn533_tx_frame_ack(dev->out_frame);
dev->out_urb->transfer_buffer = dev->out_frame;
dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
rc = usb_submit_urb(dev->out_urb, flags);
return rc;
}
static int __pn533_send_cmd_frame_async(struct pn533 *dev,
struct pn533_frame *out_frame,
struct pn533_frame *in_frame,
int in_frame_len,
pn533_cmd_complete_t cmd_complete,
void *arg)
{
int rc;
nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
PN533_FRAME_CMD(out_frame));
dev->cmd = PN533_FRAME_CMD(out_frame);
dev->cmd_complete = cmd_complete;
dev->cmd_complete_arg = arg;
dev->out_urb->transfer_buffer = out_frame;
dev->out_urb->transfer_buffer_length =
PN533_FRAME_SIZE(out_frame);
dev->in_urb->transfer_buffer = in_frame;
dev->in_urb->transfer_buffer_length = in_frame_len;
rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
if (rc)
return rc;
rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
if (rc)
goto error;
return 0;
error:
usb_unlink_urb(dev->out_urb);
return rc;
}
static void pn533_build_cmd_frame(u8 cmd_code, struct sk_buff *skb)
{
struct pn533_frame *frame;
/* payload is already there, just update datalen */
int payload_len = skb->len;
skb_push(skb, PN533_FRAME_HEADER_LEN);
skb_put(skb, PN533_FRAME_TAIL_LEN);
frame = (struct pn533_frame *)skb->data;
pn533_tx_frame_init(frame, cmd_code);
frame->datalen += payload_len;
pn533_tx_frame_finish(frame);
}
struct pn533_send_async_complete_arg {
pn533_send_async_complete_t complete_cb;
void *complete_cb_context;
struct sk_buff *resp;
struct sk_buff *req;
};
static int pn533_send_async_complete(struct pn533 *dev, void *_arg, u8 *params,
int params_len)
{
struct pn533_send_async_complete_arg *arg = _arg;
struct sk_buff *req = arg->req;
struct sk_buff *resp = arg->resp;
struct pn533_frame *frame = (struct pn533_frame *)resp->data;
int rc;
dev_kfree_skb(req);
if (params_len < 0) {
nfc_dev_err(&dev->interface->dev,
"Error %d when starting as a target",
params_len);
arg->complete_cb(dev, arg->complete_cb_context,
ERR_PTR(params_len));
rc = params_len;
dev_kfree_skb(resp);
goto out;
}
skb_put(resp, PN533_FRAME_SIZE(frame));
skb_pull(resp, PN533_FRAME_HEADER_LEN);
skb_trim(resp, resp->len - PN533_FRAME_TAIL_LEN);
rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
out:
kfree(arg);
return rc;
}
static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
struct sk_buff *req, struct sk_buff *resp,
int resp_len,
pn533_send_async_complete_t complete_cb,
void *complete_cb_context)
{
struct pn533_cmd *cmd;
struct pn533_send_async_complete_arg *arg;
int rc = 0;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
arg = kzalloc(sizeof(arg), GFP_KERNEL);
if (!arg)
return -ENOMEM;
arg->complete_cb = complete_cb;
arg->complete_cb_context = complete_cb_context;
arg->resp = resp;
arg->req = req;
pn533_build_cmd_frame(cmd_code, req);
mutex_lock(&dev->cmd_lock);
if (!dev->cmd_pending) {
rc = __pn533_send_cmd_frame_async(dev,
(struct pn533_frame *)req->data,
(struct pn533_frame *)resp->data,
resp_len, pn533_send_async_complete,
arg);
if (rc)
goto error;
dev->cmd_pending = 1;
goto unlock;
}
nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
if (!cmd) {
rc = -ENOMEM;
goto error;
}
INIT_LIST_HEAD(&cmd->queue);
cmd->cmd_code = cmd_code;
cmd->req = req;
cmd->resp = resp;
cmd->arg = arg;
list_add_tail(&cmd->queue, &dev->cmd_queue);
goto unlock;
error:
kfree(arg);
unlock:
mutex_unlock(&dev->cmd_lock);
return rc;
}
static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
struct sk_buff *req,
pn533_send_async_complete_t complete_cb,
void *complete_cb_context)
{
struct sk_buff *resp;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
resp = alloc_skb(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
if (!resp)
return -ENOMEM;
rc = __pn533_send_async(dev, cmd_code, req, resp,
PN533_NORMAL_FRAME_MAX_LEN,
complete_cb, complete_cb_context);
if (rc)
dev_kfree_skb(resp);
return rc;
}
static void pn533_wq_cmd(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, cmd_work);
struct pn533_cmd *cmd;
mutex_lock(&dev->cmd_lock);
if (list_empty(&dev->cmd_queue)) {
dev->cmd_pending = 0;
mutex_unlock(&dev->cmd_lock);
return;
}
cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
list_del(&cmd->queue);
mutex_unlock(&dev->cmd_lock);
if (cmd->cmd_code != PN533_CMD_UNDEF)
__pn533_send_cmd_frame_async(dev,
(struct pn533_frame *)cmd->req->data,
(struct pn533_frame *)cmd->resp->data,
PN533_NORMAL_FRAME_MAX_LEN,
pn533_send_async_complete,
cmd->arg);
else
__pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
cmd->in_frame_len,
cmd->cmd_complete, cmd->arg);
kfree(cmd);
}
static int pn533_send_cmd_frame_async(struct pn533 *dev,
struct pn533_frame *out_frame,
struct pn533_frame *in_frame,
int in_frame_len,
pn533_cmd_complete_t cmd_complete,
void *arg)
{
struct pn533_cmd *cmd;
int rc = 0;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
mutex_lock(&dev->cmd_lock);
if (!dev->cmd_pending) {
rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
in_frame_len, cmd_complete,
arg);
if (!rc)
dev->cmd_pending = 1;
goto unlock;
}
nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
if (!cmd) {
rc = -ENOMEM;
goto unlock;
}
INIT_LIST_HEAD(&cmd->queue);
cmd->out_frame = out_frame;
cmd->in_frame = in_frame;
cmd->in_frame_len = in_frame_len;
cmd->cmd_code = PN533_CMD_UNDEF;
cmd->cmd_complete = cmd_complete;
cmd->arg = arg;
list_add_tail(&cmd->queue, &dev->cmd_queue);
unlock:
mutex_unlock(&dev->cmd_lock);
return rc;
}
struct pn533_sync_cmd_response {
int rc;
struct completion done;
};
static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
u8 *params, int params_len)
{
struct pn533_sync_cmd_response *arg = _arg;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
arg->rc = 0;
if (params_len < 0) /* error */
arg->rc = params_len;
complete(&arg->done);
return 0;
}
static int pn533_send_cmd_frame_sync(struct pn533 *dev,
struct pn533_frame *out_frame,
struct pn533_frame *in_frame,
int in_frame_len)
{
int rc;
struct pn533_sync_cmd_response arg;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
init_completion(&arg.done);
rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
pn533_sync_cmd_complete, &arg);
if (rc)
return rc;
wait_for_completion(&arg.done);
return arg.rc;
}
static void pn533_send_complete(struct urb *urb)
{
struct pn533 *dev = urb->context;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
" status: %d", urb->status);
break;
default:
nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
" %d", urb->status);
}
}
struct pn533_target_type_a {
__be16 sens_res;
u8 sel_res;
u8 nfcid_len;
u8 nfcid_data[];
} __packed;
#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
#define PN533_TYPE_A_SEL_PROT_MIFARE 0
#define PN533_TYPE_A_SEL_PROT_ISO14443 1
#define PN533_TYPE_A_SEL_PROT_DEP 2
#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
int target_data_len)
{
u8 ssd;
u8 platconf;
if (target_data_len < sizeof(struct pn533_target_type_a))
return false;
/* The lenght check of nfcid[] and ats[] are not being performed because
the values are not being used */
/* Requirement 4.6.3.3 from NFC Forum Digital Spec */
ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
(ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
return false;
/* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
return false;
return true;
}
static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
int tgt_data_len)
{
struct pn533_target_type_a *tgt_type_a;
tgt_type_a = (struct pn533_target_type_a *) tgt_data;
if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
return -EPROTO;
switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
case PN533_TYPE_A_SEL_PROT_MIFARE:
nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
break;
case PN533_TYPE_A_SEL_PROT_ISO14443:
nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
break;
case PN533_TYPE_A_SEL_PROT_DEP:
nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
break;
case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
NFC_PROTO_NFC_DEP_MASK;
break;
}
nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
nfc_tgt->sel_res = tgt_type_a->sel_res;
nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
return 0;
}
struct pn533_target_felica {
u8 pol_res;
u8 opcode;
u8 nfcid2[8];
u8 pad[8];
/* optional */
u8 syst_code[];
} __packed;
#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
int target_data_len)
{
if (target_data_len < sizeof(struct pn533_target_felica))
return false;
if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
return false;
return true;
}
static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
int tgt_data_len)
{
struct pn533_target_felica *tgt_felica;
tgt_felica = (struct pn533_target_felica *) tgt_data;
if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
return -EPROTO;
if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
tgt_felica->nfcid2[1] ==
PN533_FELICA_SENSF_NFCID2_DEP_B2)
nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
else
nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
nfc_tgt->sensf_res_len = 9;
return 0;
}
struct pn533_target_jewel {
__be16 sens_res;
u8 jewelid[4];
} __packed;
static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
int target_data_len)
{
u8 ssd;
u8 platconf;
if (target_data_len < sizeof(struct pn533_target_jewel))
return false;
/* Requirement 4.6.3.3 from NFC Forum Digital Spec */
ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
(ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
return false;
return true;
}
static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
int tgt_data_len)
{
struct pn533_target_jewel *tgt_jewel;
tgt_jewel = (struct pn533_target_jewel *) tgt_data;
if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
return -EPROTO;
nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
nfc_tgt->nfcid1_len = 4;
memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
return 0;
}
struct pn533_type_b_prot_info {
u8 bitrate;
u8 fsci_type;
u8 fwi_adc_fo;
} __packed;
#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
struct pn533_type_b_sens_res {
u8 opcode;
u8 nfcid[4];
u8 appdata[4];
struct pn533_type_b_prot_info prot_info;
} __packed;
#define PN533_TYPE_B_OPC_SENSB_RES 0x50
struct pn533_target_type_b {
struct pn533_type_b_sens_res sensb_res;
u8 attrib_res_len;
u8 attrib_res[];
} __packed;
static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
int target_data_len)
{
if (target_data_len < sizeof(struct pn533_target_type_b))
return false;
if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
return false;
if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
PN533_TYPE_B_PROT_TYPE_RFU_MASK)
return false;
return true;
}
static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
int tgt_data_len)
{
struct pn533_target_type_b *tgt_type_b;
tgt_type_b = (struct pn533_target_type_b *) tgt_data;
if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
return -EPROTO;
nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
return 0;
}
struct pn533_poll_response {
u8 nbtg;
u8 tg;
u8 target_data[];
} __packed;
static int pn533_target_found(struct pn533 *dev,
struct pn533_poll_response *resp, int resp_len)
{
int target_data_len;
struct nfc_target nfc_tgt;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
dev->poll_mod_curr);
if (resp->tg != 1)
return -EPROTO;
memset(&nfc_tgt, 0, sizeof(struct nfc_target));
target_data_len = resp_len - sizeof(struct pn533_poll_response);
switch (dev->poll_mod_curr) {
case PN533_POLL_MOD_106KBPS_A:
rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
target_data_len);
break;
case PN533_POLL_MOD_212KBPS_FELICA:
case PN533_POLL_MOD_424KBPS_FELICA:
rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
target_data_len);
break;
case PN533_POLL_MOD_106KBPS_JEWEL:
rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
target_data_len);
break;
case PN533_POLL_MOD_847KBPS_B:
rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
target_data_len);
break;
default:
nfc_dev_err(&dev->interface->dev, "Unknown current poll"
" modulation");
return -EPROTO;
}
if (rc)
return rc;
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
nfc_dev_dbg(&dev->interface->dev, "The target found does not"
" have the desired protocol");
return -EAGAIN;
}
nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
"0x%x", nfc_tgt.supported_protocols);
dev->tgt_available_prots = nfc_tgt.supported_protocols;
nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
return 0;
}
static inline void pn533_poll_next_mod(struct pn533 *dev)
{
dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
}
static void pn533_poll_reset_mod_list(struct pn533 *dev)
{
dev->poll_mod_count = 0;
}
static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
{
dev->poll_mod_active[dev->poll_mod_count] =
(struct pn533_poll_modulations *) &poll_mod[mod_index];
dev->poll_mod_count++;
}
static void pn533_poll_create_mod_list(struct pn533 *dev,
u32 im_protocols, u32 tm_protocols)
{
pn533_poll_reset_mod_list(dev);
if (im_protocols & NFC_PROTO_MIFARE_MASK
|| im_protocols & NFC_PROTO_ISO14443_MASK
|| im_protocols & NFC_PROTO_NFC_DEP_MASK)
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
if (im_protocols & NFC_PROTO_FELICA_MASK
|| im_protocols & NFC_PROTO_NFC_DEP_MASK) {
pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
}
if (im_protocols & NFC_PROTO_JEWEL_MASK)
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
if (tm_protocols)
pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
}
static int pn533_start_poll_complete(struct pn533 *dev, u8 *params, int params_len)
{
struct pn533_poll_response *resp;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
resp = (struct pn533_poll_response *) params;
if (resp->nbtg) {
rc = pn533_target_found(dev, resp, params_len);
/* We must stop the poll after a valid target found */
if (rc == 0) {
pn533_poll_reset_mod_list(dev);
return 0;
}
}
return -EAGAIN;
}
static int pn533_init_target_frame(struct pn533_frame *frame,
u8 *gb, size_t gb_len)
{
struct pn533_cmd_init_target *cmd;
size_t cmd_len;
u8 felica_params[18] = {0x1, 0xfe, /* DEP */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0xff, 0xff}; /* System code */
u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
0x0, 0x0, 0x0,
0x40}; /* SEL_RES for DEP */
cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
cmd = kzalloc(cmd_len, GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
/* DEP support only */
cmd->mode |= PN533_INIT_TARGET_DEP;
/* Felica params */
memcpy(cmd->felica, felica_params, 18);
get_random_bytes(cmd->felica + 2, 6);
/* NFCID3 */
memset(cmd->nfcid3, 0, 10);
memcpy(cmd->nfcid3, cmd->felica, 8);
/* MIFARE params */
memcpy(cmd->mifare, mifare_params, 6);
/* General bytes */
cmd->gb_len = gb_len;
memcpy(cmd->gb, gb, gb_len);
/* Len Tk */
cmd->gb[gb_len] = 0;
memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
frame->datalen += cmd_len;
pn533_tx_frame_finish(frame);
kfree(cmd);
return 0;
}
#define PN533_CMD_DATAEXCH_HEAD_LEN 1
#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
u8 *params, int params_len)
{
struct sk_buff *skb_resp = arg;
struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (params_len < 0) {
nfc_dev_err(&dev->interface->dev,
"Error %d when starting as a target",
params_len);
return params_len;
}
if (params_len > 0 && params[0] != 0) {
nfc_tm_deactivated(dev->nfc_dev);
dev->tgt_mode = 0;
kfree_skb(skb_resp);
return 0;
}
skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
skb_pull(skb_resp,
PN533_FRAME_HEADER_LEN + PN533_CMD_DATAEXCH_HEAD_LEN);
skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_LEN);
return nfc_tm_data_received(dev->nfc_dev, skb_resp);
}
static void pn533_wq_tg_get_data(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, tg_work);
struct pn533_frame *in_frame;
struct sk_buff *skb_resp;
size_t skb_resp_len;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
skb_resp_len = PN533_FRAME_HEADER_LEN +
PN533_CMD_DATAEXCH_HEAD_LEN +
PN533_CMD_DATAEXCH_DATA_MAXLEN +
PN533_FRAME_TAIL_LEN;
skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
if (!skb_resp)
return;
in_frame = (struct pn533_frame *)skb_resp->data;
pn533_tx_frame_init(dev->out_frame, PN533_CMD_TG_GET_DATA);
pn533_tx_frame_finish(dev->out_frame);
pn533_send_cmd_frame_async(dev, dev->out_frame, in_frame,
skb_resp_len,
pn533_tm_get_data_complete,
skb_resp);
return;
}
#define ATR_REQ_GB_OFFSET 17
static int pn533_init_target_complete(struct pn533 *dev, u8 *params, int params_len)
{
struct pn533_cmd_init_target_response *resp;
u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
size_t gb_len;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (params_len < 0) {
nfc_dev_err(&dev->interface->dev,
"Error %d when starting as a target",
params_len);
return params_len;
}
if (params_len < ATR_REQ_GB_OFFSET + 1)
return -EINVAL;
resp = (struct pn533_cmd_init_target_response *) params;
nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
resp->mode, params_len);
frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
comm_mode = NFC_COMM_ACTIVE;
/* Again, only DEP */
if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
return -EOPNOTSUPP;
gb = resp->cmd + ATR_REQ_GB_OFFSET;
gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
comm_mode, gb, gb_len);
if (rc < 0) {
nfc_dev_err(&dev->interface->dev,
"Error when signaling target activation");
return rc;
}
dev->tgt_mode = 1;
queue_work(dev->wq, &dev->tg_work);
return 0;
}
static void pn533_listen_mode_timer(unsigned long data)
{
struct pn533 *dev = (struct pn533 *) data;
nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
/* An ack will cancel the last issued command (poll) */
pn533_send_ack(dev, GFP_ATOMIC);
dev->cancel_listen = 1;
pn533_poll_next_mod(dev);
queue_work(dev->wq, &dev->poll_work);
}
static int pn533_poll_complete(struct pn533 *dev, void *arg,
u8 *params, int params_len)
{
struct pn533_poll_modulations *cur_mod;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (params_len == -ENOENT) {
if (dev->poll_mod_count != 0)
return 0;
nfc_dev_err(&dev->interface->dev,
"Polling operation has been stopped");
goto stop_poll;
}
if (params_len < 0) {
nfc_dev_err(&dev->interface->dev,
"Error %d when running poll", params_len);
goto stop_poll;
}
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
if (cur_mod->len == 0) {
del_timer(&dev->listen_timer);
return pn533_init_target_complete(dev, params, params_len);
} else {
rc = pn533_start_poll_complete(dev, params, params_len);
if (!rc)
return rc;
}
pn533_poll_next_mod(dev);
queue_work(dev->wq, &dev->poll_work);
return 0;
stop_poll:
pn533_poll_reset_mod_list(dev);
dev->poll_protocols = 0;
return 0;
}
static void pn533_build_poll_frame(struct pn533 *dev,
struct pn533_frame *frame,
struct pn533_poll_modulations *mod)
{
nfc_dev_dbg(&dev->interface->dev, "mod len %d\n", mod->len);
if (mod->len == 0) {
/* Listen mode */
pn533_init_target_frame(frame, dev->gb, dev->gb_len);
} else {
/* Polling mode */
pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
frame->datalen += mod->len;
pn533_tx_frame_finish(frame);
}
}
static int pn533_send_poll_frame(struct pn533 *dev)
{
struct pn533_poll_modulations *cur_mod;
int rc;
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
pn533_build_poll_frame(dev, dev->out_frame, cur_mod);
rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN,
pn533_poll_complete,
NULL);
if (rc)
nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
return rc;
}
static void pn533_wq_poll(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, poll_work);
struct pn533_poll_modulations *cur_mod;
int rc;
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
nfc_dev_dbg(&dev->interface->dev,
"%s cancel_listen %d modulation len %d",
__func__, dev->cancel_listen, cur_mod->len);
if (dev->cancel_listen == 1) {
dev->cancel_listen = 0;
usb_kill_urb(dev->in_urb);
}
rc = pn533_send_poll_frame(dev);
if (rc)
return;
if (cur_mod->len == 0 && dev->poll_mod_count > 1)
mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
return;
}
static int pn533_start_poll(struct nfc_dev *nfc_dev,
u32 im_protocols, u32 tm_protocols)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
nfc_dev_dbg(&dev->interface->dev,
"%s: im protocols 0x%x tm protocols 0x%x",
__func__, im_protocols, tm_protocols);
if (dev->tgt_active_prot) {
nfc_dev_err(&dev->interface->dev,
"Cannot poll with a target already activated");
return -EBUSY;
}
if (dev->tgt_mode) {
nfc_dev_err(&dev->interface->dev,
"Cannot poll while already being activated");
return -EBUSY;
}
if (tm_protocols) {
dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
if (dev->gb == NULL)
tm_protocols = 0;
}
dev->poll_mod_curr = 0;
pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
dev->poll_protocols = im_protocols;
dev->listen_protocols = tm_protocols;
return pn533_send_poll_frame(dev);
}
static void pn533_stop_poll(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
del_timer(&dev->listen_timer);
if (!dev->poll_mod_count) {
nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
" running");
return;
}
/* An ack will cancel the last issued command (poll) */
pn533_send_ack(dev, GFP_KERNEL);
/* prevent pn533_start_poll_complete to issue a new poll meanwhile */
usb_kill_urb(dev->in_urb);
pn533_poll_reset_mod_list(dev);
}
static int pn533_activate_target_nfcdep(struct pn533 *dev)
{
struct pn533_cmd_activate_param param;
struct pn533_cmd_activate_response *resp;
u16 gt_len;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
param.tg = 1;
param.next = 0;
memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
sizeof(struct pn533_cmd_activate_param));
dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
pn533_tx_frame_finish(dev->out_frame);
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN);
if (rc)
return rc;
resp = (struct pn533_cmd_activate_response *)
PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
rc = resp->status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS)
return -EIO;
/* ATR_RES general bytes are located at offset 16 */
gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
return rc;
}
static int pn533_activate_target(struct nfc_dev *nfc_dev,
struct nfc_target *target, u32 protocol)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
protocol);
if (dev->poll_mod_count) {
nfc_dev_err(&dev->interface->dev, "Cannot activate while"
" polling");
return -EBUSY;
}
if (dev->tgt_active_prot) {
nfc_dev_err(&dev->interface->dev, "There is already an active"
" target");
return -EBUSY;
}
if (!dev->tgt_available_prots) {
nfc_dev_err(&dev->interface->dev, "There is no available target"
" to activate");
return -EINVAL;
}
if (!(dev->tgt_available_prots & (1 << protocol))) {
nfc_dev_err(&dev->interface->dev, "The target does not support"
" the requested protocol %u", protocol);
return -EINVAL;
}
if (protocol == NFC_PROTO_NFC_DEP) {
rc = pn533_activate_target_nfcdep(dev);
if (rc) {
nfc_dev_err(&dev->interface->dev, "Error %d when"
" activating target with"
" NFC_DEP protocol", rc);
return rc;
}
}
dev->tgt_active_prot = protocol;
dev->tgt_available_prots = 0;
return 0;
}
static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
struct nfc_target *target)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
u8 tg;
u8 status;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (!dev->tgt_active_prot) {
nfc_dev_err(&dev->interface->dev, "There is no active target");
return;
}
dev->tgt_active_prot = 0;
skb_queue_purge(&dev->resp_q);
pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
tg = 1;
memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
dev->out_frame->datalen += sizeof(u8);
pn533_tx_frame_finish(dev->out_frame);
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN);
if (rc) {
nfc_dev_err(&dev->interface->dev, "Error when sending release"
" command to the controller");
return;
}
status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
rc = status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS)
nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
" the target", rc);
return;
}
static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
u8 *params, int params_len)
{
struct pn533_cmd_jump_dep_response *resp;
struct nfc_target nfc_target;
u8 target_gt_len;
int rc;
struct pn533_cmd_jump_dep *cmd = (struct pn533_cmd_jump_dep *)arg;
u8 active = cmd->active;
kfree(arg);
if (params_len == -ENOENT) {
nfc_dev_dbg(&dev->interface->dev, "");
return 0;
}
if (params_len < 0) {
nfc_dev_err(&dev->interface->dev,
"Error %d when bringing DEP link up",
params_len);
return 0;
}
if (dev->tgt_available_prots &&
!(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
nfc_dev_err(&dev->interface->dev,
"The target does not support DEP");
return -EINVAL;
}
resp = (struct pn533_cmd_jump_dep_response *) params;
rc = resp->status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS) {
nfc_dev_err(&dev->interface->dev,
"Bringing DEP link up failed %d", rc);
return 0;
}
if (!dev->tgt_available_prots) {
nfc_dev_dbg(&dev->interface->dev, "Creating new target");
nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
nfc_target.nfcid1_len = 10;
memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
if (rc)
return 0;
dev->tgt_available_prots = 0;
}
dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
/* ATR_RES general bytes are located at offset 17 */
target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
rc = nfc_set_remote_general_bytes(dev->nfc_dev,
resp->gt, target_gt_len);
if (rc == 0)
rc = nfc_dep_link_is_up(dev->nfc_dev,
dev->nfc_dev->targets[0].idx,
!active, NFC_RF_INITIATOR);
return 0;
}
static int pn533_mod_to_baud(struct pn533 *dev)
{
switch (dev->poll_mod_curr) {
case PN533_POLL_MOD_106KBPS_A:
return 0;
case PN533_POLL_MOD_212KBPS_FELICA:
return 1;
case PN533_POLL_MOD_424KBPS_FELICA:
return 2;
default:
return -EINVAL;
}
}
#define PASSIVE_DATA_LEN 5
static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
u8 comm_mode, u8* gb, size_t gb_len)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct pn533_cmd_jump_dep *cmd;
u8 cmd_len, *data_ptr;
u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
int rc, baud;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (dev->poll_mod_count) {
nfc_dev_err(&dev->interface->dev,
"Cannot bring the DEP link up while polling");
return -EBUSY;
}
if (dev->tgt_active_prot) {
nfc_dev_err(&dev->interface->dev,
"There is already an active target");
return -EBUSY;
}
baud = pn533_mod_to_baud(dev);
if (baud < 0) {
nfc_dev_err(&dev->interface->dev,
"Invalid curr modulation %d", dev->poll_mod_curr);
return baud;
}
cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
if (comm_mode == NFC_COMM_PASSIVE)
cmd_len += PASSIVE_DATA_LEN;
cmd = kzalloc(cmd_len, GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
cmd->active = !comm_mode;
cmd->next = 0;
cmd->baud = baud;
data_ptr = cmd->data;
if (comm_mode == NFC_COMM_PASSIVE && cmd->baud > 0) {
memcpy(data_ptr, passive_data, PASSIVE_DATA_LEN);
cmd->next |= 1;
data_ptr += PASSIVE_DATA_LEN;
}
if (gb != NULL && gb_len > 0) {
cmd->next |= 4; /* We have some Gi */
memcpy(data_ptr, gb, gb_len);
} else {
cmd->next = 0;
}
memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
dev->out_frame->datalen += cmd_len;
pn533_tx_frame_finish(dev->out_frame);
rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN,
pn533_in_dep_link_up_complete, cmd);
if (rc < 0)
kfree(cmd);
return rc;
}
static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
pn533_poll_reset_mod_list(dev);
if (dev->tgt_mode || dev->tgt_active_prot) {
pn533_send_ack(dev, GFP_KERNEL);
usb_kill_urb(dev->in_urb);
}
dev->tgt_active_prot = 0;
dev->tgt_mode = 0;
skb_queue_purge(&dev->resp_q);
return 0;
}
static int pn533_build_tx_frame(struct pn533 *dev, struct sk_buff *skb,
bool target)
{
int payload_len = skb->len;
struct pn533_frame *out_frame;
u8 tg;
nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
payload_len);
if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
/* TODO: Implement support to multi-part data exchange */
nfc_dev_err(&dev->interface->dev, "Data length greater than the"
" max allowed: %d",
PN533_CMD_DATAEXCH_DATA_MAXLEN);
return -ENOSYS;
}
skb_push(skb, PN533_FRAME_HEADER_LEN);
if (target == true) {
switch (dev->device_type) {
case PN533_DEVICE_PASORI:
if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
out_frame = (struct pn533_frame *) skb->data;
pn533_tx_frame_init(out_frame,
PN533_CMD_IN_COMM_THRU);
break;
}
default:
skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
out_frame = (struct pn533_frame *) skb->data;
pn533_tx_frame_init(out_frame,
PN533_CMD_IN_DATA_EXCHANGE);
tg = 1;
memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame),
&tg, sizeof(u8));
out_frame->datalen += sizeof(u8);
break;
}
} else {
skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN - 1);
out_frame = (struct pn533_frame *) skb->data;
pn533_tx_frame_init(out_frame, PN533_CMD_TG_SET_DATA);
}
/* The data is already in the out_frame, just update the datalen */
out_frame->datalen += payload_len;
pn533_tx_frame_finish(out_frame);
skb_put(skb, PN533_FRAME_TAIL_LEN);
return 0;
}
struct pn533_data_exchange_arg {
struct sk_buff *skb_resp;
struct sk_buff *skb_out;
data_exchange_cb_t cb;
void *cb_context;
};
static struct sk_buff *pn533_build_response(struct pn533 *dev)
{
struct sk_buff *skb, *tmp, *t;
unsigned int skb_len = 0, tmp_len = 0;
nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
if (skb_queue_empty(&dev->resp_q))
return NULL;
if (skb_queue_len(&dev->resp_q) == 1) {
skb = skb_dequeue(&dev->resp_q);
goto out;
}
skb_queue_walk_safe(&dev->resp_q, tmp, t)
skb_len += tmp->len;
nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
__func__, skb_len);
skb = alloc_skb(skb_len, GFP_KERNEL);
if (skb == NULL)
goto out;
skb_put(skb, skb_len);
skb_queue_walk_safe(&dev->resp_q, tmp, t) {
memcpy(skb->data + tmp_len, tmp->data, tmp->len);
tmp_len += tmp->len;
}
out:
skb_queue_purge(&dev->resp_q);
return skb;
}
static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
u8 *params, int params_len)
{
struct pn533_data_exchange_arg *arg = _arg;
struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
int err = 0;
u8 status;
u8 cmd_ret;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
dev_kfree_skb(arg->skb_out);
if (params_len < 0) { /* error */
err = params_len;
goto error;
}
status = params[0];
cmd_ret = status & PN533_CMD_RET_MASK;
if (cmd_ret != PN533_CMD_RET_SUCCESS) {
nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
" exchanging data", cmd_ret);
err = -EIO;
goto error;
}
skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
skb_pull(skb_resp, PN533_FRAME_HEADER_LEN);
skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_LEN);
skb_queue_tail(&dev->resp_q, skb_resp);
if (status & PN533_CMD_MI_MASK) {
queue_work(dev->wq, &dev->mi_work);
return -EINPROGRESS;
}
skb = pn533_build_response(dev);
if (skb == NULL)
goto error;
arg->cb(arg->cb_context, skb, 0);
kfree(arg);
return 0;
error:
skb_queue_purge(&dev->resp_q);
dev_kfree_skb(skb_resp);
arg->cb(arg->cb_context, NULL, err);
kfree(arg);
return 0;
}
static int pn533_transceive(struct nfc_dev *nfc_dev,
struct nfc_target *target, struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct pn533_frame *out_frame, *in_frame;
struct pn533_data_exchange_arg *arg;
struct sk_buff *skb_resp;
int skb_resp_len;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (!dev->tgt_active_prot) {
nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
" there is no active target");
rc = -EINVAL;
goto error;
}
rc = pn533_build_tx_frame(dev, skb, true);
if (rc)
goto error;
skb_resp_len = PN533_FRAME_HEADER_LEN +
PN533_CMD_DATAEXCH_HEAD_LEN +
PN533_CMD_DATAEXCH_DATA_MAXLEN +
PN533_FRAME_TAIL_LEN;
skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
if (!skb_resp) {
rc = -ENOMEM;
goto error;
}
in_frame = (struct pn533_frame *) skb_resp->data;
out_frame = (struct pn533_frame *) skb->data;
arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
if (!arg) {
rc = -ENOMEM;
goto free_skb_resp;
}
arg->skb_resp = skb_resp;
arg->skb_out = skb;
arg->cb = cb;
arg->cb_context = cb_context;
rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
pn533_data_exchange_complete, arg);
if (rc) {
nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
" perform data_exchange", rc);
goto free_arg;
}
return 0;
free_arg:
kfree(arg);
free_skb_resp:
kfree_skb(skb_resp);
error:
kfree_skb(skb);
return rc;
}
static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
u8 *params, int params_len)
{
struct sk_buff *skb_out = arg;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
dev_kfree_skb(skb_out);
if (params_len < 0) {
nfc_dev_err(&dev->interface->dev,
"Error %d when sending data",
params_len);
return params_len;
}
if (params_len > 0 && params[0] != 0) {
nfc_tm_deactivated(dev->nfc_dev);
dev->tgt_mode = 0;
return 0;
}
queue_work(dev->wq, &dev->tg_work);
return 0;
}
static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct pn533_frame *out_frame;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
rc = pn533_build_tx_frame(dev, skb, false);
if (rc)
goto error;
out_frame = (struct pn533_frame *) skb->data;
rc = pn533_send_cmd_frame_async(dev, out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN,
pn533_tm_send_complete, skb);
if (rc) {
nfc_dev_err(&dev->interface->dev,
"Error %d when trying to send data", rc);
goto error;
}
return 0;
error:
kfree_skb(skb);
return rc;
}
static void pn533_wq_mi_recv(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, mi_work);
struct sk_buff *skb_cmd;
struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
struct pn533_frame *out_frame, *in_frame;
struct sk_buff *skb_resp;
int skb_resp_len;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
/* This is a zero payload size skb */
skb_cmd = alloc_skb(PN533_FRAME_HEADER_LEN +
PN533_CMD_DATAEXCH_HEAD_LEN +
PN533_FRAME_TAIL_LEN,
GFP_KERNEL);
if (skb_cmd == NULL)
goto error_cmd;
skb_reserve(skb_cmd,
PN533_FRAME_HEADER_LEN + PN533_CMD_DATAEXCH_HEAD_LEN);
rc = pn533_build_tx_frame(dev, skb_cmd, true);
if (rc)
goto error_frame;
skb_resp_len = PN533_FRAME_HEADER_LEN +
PN533_CMD_DATAEXCH_HEAD_LEN +
PN533_CMD_DATAEXCH_DATA_MAXLEN +
PN533_FRAME_TAIL_LEN;
skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
if (!skb_resp) {
rc = -ENOMEM;
goto error_frame;
}
in_frame = (struct pn533_frame *) skb_resp->data;
out_frame = (struct pn533_frame *) skb_cmd->data;
arg->skb_resp = skb_resp;
arg->skb_out = skb_cmd;
rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
skb_resp_len,
pn533_data_exchange_complete,
dev->cmd_complete_arg);
if (!rc)
return;
nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
" perform data_exchange", rc);
kfree_skb(skb_resp);
error_frame:
kfree_skb(skb_cmd);
error_cmd:
pn533_send_ack(dev, GFP_KERNEL);
kfree(arg);
queue_work(dev->wq, &dev->cmd_work);
}
static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
u8 cfgdata_len)
{
int rc;
u8 *params;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
params[0] = cfgitem;
memcpy(&params[1], cfgdata, cfgdata_len);
dev->out_frame->datalen += (1 + cfgdata_len);
pn533_tx_frame_finish(dev->out_frame);
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN);
return rc;
}
static int pn533_fw_reset(struct pn533 *dev)
{
int rc;
u8 *params;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
pn533_tx_frame_init(dev->out_frame, 0x18);
params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
params[0] = 0x1;
dev->out_frame->datalen += 1;
pn533_tx_frame_finish(dev->out_frame);
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN);
return rc;
}
static struct nfc_ops pn533_nfc_ops = {
.dev_up = NULL,
.dev_down = NULL,
.dep_link_up = pn533_dep_link_up,
.dep_link_down = pn533_dep_link_down,
.start_poll = pn533_start_poll,
.stop_poll = pn533_stop_poll,
.activate_target = pn533_activate_target,
.deactivate_target = pn533_deactivate_target,
.im_transceive = pn533_transceive,
.tm_send = pn533_tm_send,
};
static int pn533_setup(struct pn533 *dev)
{
struct pn533_config_max_retries max_retries;
struct pn533_config_timing timing;
u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
int rc;
switch (dev->device_type) {
case PN533_DEVICE_STD:
max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
max_retries.mx_rty_psl = 2;
max_retries.mx_rty_passive_act =
PN533_CONFIG_MAX_RETRIES_NO_RETRY;
timing.rfu = PN533_CONFIG_TIMING_102;
timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
timing.dep_timeout = PN533_CONFIG_TIMING_409;
break;
case PN533_DEVICE_PASORI:
max_retries.mx_rty_atr = 0x2;
max_retries.mx_rty_psl = 0x1;
max_retries.mx_rty_passive_act =
PN533_CONFIG_MAX_RETRIES_NO_RETRY;
timing.rfu = PN533_CONFIG_TIMING_102;
timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
timing.dep_timeout = PN533_CONFIG_TIMING_204;
break;
default:
nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
dev->device_type);
return -EINVAL;
}
rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
(u8 *)&max_retries, sizeof(max_retries));
if (rc) {
nfc_dev_err(&dev->interface->dev,
"Error on setting MAX_RETRIES config");
return rc;
}
rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
(u8 *)&timing, sizeof(timing));
if (rc) {
nfc_dev_err(&dev->interface->dev,
"Error on setting RF timings");
return rc;
}
switch (dev->device_type) {
case PN533_DEVICE_STD:
break;
case PN533_DEVICE_PASORI:
pn533_fw_reset(dev);
rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
pasori_cfg, 3);
if (rc) {
nfc_dev_err(&dev->interface->dev,
"Error while settings PASORI config");
return rc;
}
pn533_fw_reset(dev);
break;
}
return 0;
}
static int pn533_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct pn533_fw_version *fw_ver;
struct pn533 *dev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int in_endpoint = 0;
int out_endpoint = 0;
int rc = -ENOMEM;
int i;
u32 protocols;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->udev = usb_get_dev(interface_to_usbdev(interface));
dev->interface = interface;
mutex_init(&dev->cmd_lock);
iface_desc = interface->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
in_endpoint = endpoint->bEndpointAddress;
if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
out_endpoint = endpoint->bEndpointAddress;
}
if (!in_endpoint || !out_endpoint) {
nfc_dev_err(&interface->dev, "Could not find bulk-in or"
" bulk-out endpoint");
rc = -ENODEV;
goto error;
}
dev->in_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
dev->out_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->in_frame || !dev->out_frame ||
!dev->in_urb || !dev->out_urb)
goto error;
usb_fill_bulk_urb(dev->in_urb, dev->udev,
usb_rcvbulkpipe(dev->udev, in_endpoint),
NULL, 0, NULL, dev);
usb_fill_bulk_urb(dev->out_urb, dev->udev,
usb_sndbulkpipe(dev->udev, out_endpoint),
NULL, 0,
pn533_send_complete, dev);
INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
INIT_WORK(&dev->poll_work, pn533_wq_poll);
dev->wq = alloc_ordered_workqueue("pn533", 0);
if (dev->wq == NULL)
goto error;
init_timer(&dev->listen_timer);
dev->listen_timer.data = (unsigned long) dev;
dev->listen_timer.function = pn533_listen_mode_timer;
skb_queue_head_init(&dev->resp_q);
INIT_LIST_HEAD(&dev->cmd_queue);
usb_set_intfdata(interface, dev);
pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
pn533_tx_frame_finish(dev->out_frame);
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
PN533_NORMAL_FRAME_MAX_LEN);
if (rc)
goto destroy_wq;
fw_ver = (struct pn533_fw_version *)
PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
" attached", fw_ver->ver, fw_ver->rev);
dev->device_type = id->driver_info;
switch (dev->device_type) {
case PN533_DEVICE_STD:
protocols = PN533_ALL_PROTOCOLS;
break;
case PN533_DEVICE_PASORI:
protocols = PN533_NO_TYPE_B_PROTOCOLS;
break;
default:
nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
dev->device_type);
rc = -EINVAL;
goto destroy_wq;
}
dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
PN533_FRAME_HEADER_LEN +
PN533_CMD_DATAEXCH_HEAD_LEN,
PN533_FRAME_TAIL_LEN);
if (!dev->nfc_dev)
goto destroy_wq;
nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
nfc_set_drvdata(dev->nfc_dev, dev);
rc = nfc_register_device(dev->nfc_dev);
if (rc)
goto free_nfc_dev;
rc = pn533_setup(dev);
if (rc)
goto unregister_nfc_dev;
return 0;
unregister_nfc_dev:
nfc_unregister_device(dev->nfc_dev);
free_nfc_dev:
nfc_free_device(dev->nfc_dev);
destroy_wq:
destroy_workqueue(dev->wq);
error:
kfree(dev->in_frame);
usb_free_urb(dev->in_urb);
kfree(dev->out_frame);
usb_free_urb(dev->out_urb);
kfree(dev);
return rc;
}
static void pn533_disconnect(struct usb_interface *interface)
{
struct pn533 *dev;
struct pn533_cmd *cmd, *n;
dev = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
nfc_unregister_device(dev->nfc_dev);
nfc_free_device(dev->nfc_dev);
usb_kill_urb(dev->in_urb);
usb_kill_urb(dev->out_urb);
destroy_workqueue(dev->wq);
skb_queue_purge(&dev->resp_q);
del_timer(&dev->listen_timer);
list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
list_del(&cmd->queue);
kfree(cmd);
}
kfree(dev->in_frame);
usb_free_urb(dev->in_urb);
kfree(dev->out_frame);
usb_free_urb(dev->out_urb);
kfree(dev);
nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
}
static struct usb_driver pn533_driver = {
.name = "pn533",
.probe = pn533_probe,
.disconnect = pn533_disconnect,
.id_table = pn533_table,
};
module_usb_driver(pn533_driver);
MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
" Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
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