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WSL2-Linux-Kernel/drivers/nfc/pn533/pn533.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for NXP PN533 NFC Chip - core functions
*
* Copyright (C) 2011 Instituto Nokia de Tecnologia
* Copyright (C) 2012-2013 Tieto Poland
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/nfc.h>
#include <linux/netdevice.h>
#include <net/nfc/nfc.h>
#include "pn533.h"
#define VERSION "0.3"
/* How much time we spend listening for initiators */
#define PN533_LISTEN_TIME 2
/* Delay between each poll frame (ms) */
#define PN533_POLL_INTERVAL 10
/* 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_RF_FIELD 0x01
#define PN533_CFGITEM_TIMING 0x02
#define PN533_CFGITEM_MAX_RETRIES 0x05
#define PN533_CFGITEM_PASORI 0x82
#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
#define PN533_CFGITEM_RF_FIELD_ON 0x1
#define PN533_CFGITEM_RF_FIELD_OFF 0x0
#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;
};
struct pn533_poll_modulations {
struct {
u8 maxtg;
u8 brty;
union pn533_cmd_poll_initdata initiator_data;
} __packed data;
u8 len;
};
static 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_SYSTEM_CODE,
.tsn = 0x03,
},
},
.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_SYSTEM_CODE,
.tsn = 0x03,
},
},
.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_response {
u8 status;
u8 nfcid3t[10];
u8 didt;
u8 bst;
u8 brt;
u8 to;
u8 ppt;
/* optional */
u8 gt[];
} __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;
struct pn532_autopoll_resp {
u8 type;
u8 ln;
u8 tg;
u8 tgdata[];
};
/* PN532_CMD_IN_AUTOPOLL */
#define PN532_AUTOPOLL_POLLNR_INFINITE 0xff
#define PN532_AUTOPOLL_PERIOD 0x03 /* in units of 150 ms */
#define PN532_AUTOPOLL_TYPE_GENERIC_106 0x00
#define PN532_AUTOPOLL_TYPE_GENERIC_212 0x01
#define PN532_AUTOPOLL_TYPE_GENERIC_424 0x02
#define PN532_AUTOPOLL_TYPE_JEWEL 0x04
#define PN532_AUTOPOLL_TYPE_MIFARE 0x10
#define PN532_AUTOPOLL_TYPE_FELICA212 0x11
#define PN532_AUTOPOLL_TYPE_FELICA424 0x12
#define PN532_AUTOPOLL_TYPE_ISOA 0x20
#define PN532_AUTOPOLL_TYPE_ISOB 0x23
#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106 0x40
#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212 0x41
#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424 0x42
#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106 0x80
#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212 0x81
#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424 0x82
/* 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
/* The rule: value(high byte) + value(low byte) + checksum = 0 */
static inline u8 pn533_ext_checksum(u16 value)
{
return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
}
/* The rule: value + checksum = 0 */
static inline u8 pn533_std_checksum(u8 value)
{
return ~value + 1;
}
/* The rule: sum(data elements) + checksum = 0 */
static u8 pn533_std_data_checksum(u8 *data, int datalen)
{
u8 sum = 0;
int i;
for (i = 0; i < datalen; i++)
sum += data[i];
return pn533_std_checksum(sum);
}
static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
{
struct pn533_std_frame *frame = _frame;
frame->preamble = 0;
frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
PN533_FRAME_CMD(frame) = cmd_code;
frame->datalen = 2;
}
static void pn533_std_tx_frame_finish(void *_frame)
{
struct pn533_std_frame *frame = _frame;
frame->datalen_checksum = pn533_std_checksum(frame->datalen);
PN533_STD_FRAME_CHECKSUM(frame) =
pn533_std_data_checksum(frame->data, frame->datalen);
PN533_STD_FRAME_POSTAMBLE(frame) = 0;
}
static void pn533_std_tx_update_payload_len(void *_frame, int len)
{
struct pn533_std_frame *frame = _frame;
frame->datalen += len;
}
static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
{
u8 checksum;
struct pn533_std_frame *stdf = _frame;
if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
return false;
if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
/* Standard frame code */
dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
checksum = pn533_std_checksum(stdf->datalen);
if (checksum != stdf->datalen_checksum)
return false;
checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
return false;
} else {
/* Extended */
struct pn533_ext_frame *eif = _frame;
dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
if (checksum != eif->datalen_checksum)
return false;
/* check data checksum */
checksum = pn533_std_data_checksum(eif->data,
be16_to_cpu(eif->datalen));
if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
return false;
}
return true;
}
bool pn533_rx_frame_is_ack(void *_frame)
{
struct pn533_std_frame *frame = _frame;
if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
return false;
if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
return false;
return true;
}
EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
static inline int pn533_std_rx_frame_size(void *frame)
{
struct pn533_std_frame *f = frame;
/* check for Extended Information frame */
if (PN533_STD_IS_EXTENDED(f)) {
struct pn533_ext_frame *eif = frame;
return sizeof(struct pn533_ext_frame)
+ be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
}
return sizeof(struct pn533_std_frame) + f->datalen +
PN533_STD_FRAME_TAIL_LEN;
}
static u8 pn533_std_get_cmd_code(void *frame)
{
struct pn533_std_frame *f = frame;
struct pn533_ext_frame *eif = frame;
if (PN533_STD_IS_EXTENDED(f))
return PN533_FRAME_CMD(eif);
else
return PN533_FRAME_CMD(f);
}
bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
{
return (dev->ops->get_cmd_code(frame) ==
PN533_CMD_RESPONSE(dev->cmd->code));
}
EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
static struct pn533_frame_ops pn533_std_frame_ops = {
.tx_frame_init = pn533_std_tx_frame_init,
.tx_frame_finish = pn533_std_tx_frame_finish,
.tx_update_payload_len = pn533_std_tx_update_payload_len,
.tx_header_len = PN533_STD_FRAME_HEADER_LEN,
.tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
.rx_is_frame_valid = pn533_std_rx_frame_is_valid,
.rx_frame_size = pn533_std_rx_frame_size,
.rx_header_len = PN533_STD_FRAME_HEADER_LEN,
.rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
.max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
.get_cmd_code = pn533_std_get_cmd_code,
};
static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
struct sk_buff *skb)
{
/* payload is already there, just update datalen */
int payload_len = skb->len;
struct pn533_frame_ops *ops = dev->ops;
skb_push(skb, ops->tx_header_len);
skb_put(skb, ops->tx_tail_len);
ops->tx_frame_init(skb->data, cmd_code);
ops->tx_update_payload_len(skb->data, payload_len);
ops->tx_frame_finish(skb->data);
}
static int pn533_send_async_complete(struct pn533 *dev)
{
struct pn533_cmd *cmd = dev->cmd;
struct sk_buff *resp;
int status, rc = 0;
if (!cmd) {
dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
goto done;
}
dev_kfree_skb(cmd->req);
status = cmd->status;
resp = cmd->resp;
if (status < 0) {
rc = cmd->complete_cb(dev, cmd->complete_cb_context,
ERR_PTR(status));
dev_kfree_skb(resp);
goto done;
}
/* when no response is set we got interrupted */
if (!resp)
resp = ERR_PTR(-EINTR);
if (!IS_ERR(resp)) {
skb_pull(resp, dev->ops->rx_header_len);
skb_trim(resp, resp->len - dev->ops->rx_tail_len);
}
rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
done:
kfree(cmd);
dev->cmd = NULL;
return rc;
}
static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
struct sk_buff *req,
pn533_send_async_complete_t complete_cb,
void *complete_cb_context)
{
struct pn533_cmd *cmd;
int rc = 0;
dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->code = cmd_code;
cmd->req = req;
cmd->complete_cb = complete_cb;
cmd->complete_cb_context = complete_cb_context;
pn533_build_cmd_frame(dev, cmd_code, req);
mutex_lock(&dev->cmd_lock);
if (!dev->cmd_pending) {
dev->cmd = cmd;
rc = dev->phy_ops->send_frame(dev, req);
if (rc) {
dev->cmd = NULL;
goto error;
}
dev->cmd_pending = 1;
goto unlock;
}
dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
__func__, cmd_code);
INIT_LIST_HEAD(&cmd->queue);
list_add_tail(&cmd->queue, &dev->cmd_queue);
goto unlock;
error:
kfree(cmd);
unlock:
mutex_unlock(&dev->cmd_lock);
return rc;
}
static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
struct sk_buff *req,
pn533_send_async_complete_t complete_cb,
void *complete_cb_context)
{
return __pn533_send_async(dev, cmd_code, req, complete_cb,
complete_cb_context);
}
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)
{
return __pn533_send_async(dev, cmd_code, req, complete_cb,
complete_cb_context);
}
/*
* pn533_send_cmd_direct_async
*
* The function sends a priority cmd directly to the chip omitting the cmd
* queue. It's intended to be used by chaining mechanism of received responses
* where the host has to request every single chunk of data before scheduling
* next cmd from the queue.
*/
static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
struct sk_buff *req,
pn533_send_async_complete_t complete_cb,
void *complete_cb_context)
{
struct pn533_cmd *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->code = cmd_code;
cmd->req = req;
cmd->complete_cb = complete_cb;
cmd->complete_cb_context = complete_cb_context;
pn533_build_cmd_frame(dev, cmd_code, req);
dev->cmd = cmd;
rc = dev->phy_ops->send_frame(dev, req);
if (rc < 0) {
dev->cmd = NULL;
kfree(cmd);
}
return rc;
}
static void pn533_wq_cmd_complete(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
int rc;
rc = pn533_send_async_complete(dev);
if (rc != -EINPROGRESS)
queue_work(dev->wq, &dev->cmd_work);
}
static void pn533_wq_cmd(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, cmd_work);
struct pn533_cmd *cmd;
int rc;
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);
dev->cmd = cmd;
rc = dev->phy_ops->send_frame(dev, cmd->req);
if (rc < 0) {
dev->cmd = NULL;
dev_kfree_skb(cmd->req);
kfree(cmd);
return;
}
}
struct pn533_sync_cmd_response {
struct sk_buff *resp;
struct completion done;
};
static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
struct sk_buff *resp)
{
struct pn533_sync_cmd_response *arg = _arg;
arg->resp = resp;
complete(&arg->done);
return 0;
}
/* pn533_send_cmd_sync
*
* Please note the req parameter is freed inside the function to
* limit a number of return value interpretations by the caller.
*
* 1. negative in case of error during TX path -> req should be freed
*
* 2. negative in case of error during RX path -> req should not be freed
* as it's been already freed at the beginning of RX path by
* async_complete_cb.
*
* 3. valid pointer in case of successful RX path
*
* A caller has to check a return value with IS_ERR macro. If the test pass,
* the returned pointer is valid.
*
*/
static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
struct sk_buff *req)
{
int rc;
struct pn533_sync_cmd_response arg;
init_completion(&arg.done);
rc = pn533_send_cmd_async(dev, cmd_code, req,
pn533_send_sync_complete, &arg);
if (rc) {
dev_kfree_skb(req);
return ERR_PTR(rc);
}
wait_for_completion(&arg.done);
return arg.resp;
}
static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
{
struct sk_buff *skb;
skb = alloc_skb(dev->ops->tx_header_len +
size +
dev->ops->tx_tail_len, GFP_KERNEL);
if (skb)
skb_reserve(skb, dev->ops->tx_header_len);
return skb;
}
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 length 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;
if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
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[NFC_NFCID2_MAXSIZE];
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;
memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
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;
}
static void pn533_poll_reset_mod_list(struct pn533 *dev);
static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
int tgdata_len)
{
struct nfc_target nfc_tgt;
int rc;
dev_dbg(dev->dev, "%s: modulation=%d\n",
__func__, dev->poll_mod_curr);
if (tg != 1)
return -EPROTO;
memset(&nfc_tgt, 0, sizeof(struct nfc_target));
switch (dev->poll_mod_curr) {
case PN533_POLL_MOD_106KBPS_A:
rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
break;
case PN533_POLL_MOD_212KBPS_FELICA:
case PN533_POLL_MOD_424KBPS_FELICA:
rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
break;
case PN533_POLL_MOD_106KBPS_JEWEL:
rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
break;
case PN533_POLL_MOD_847KBPS_B:
rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
break;
default:
nfc_err(dev->dev,
"Unknown current poll modulation\n");
return -EPROTO;
}
if (rc)
return rc;
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
dev_dbg(dev->dev,
"The Tg found doesn't have the desired protocol\n");
return -EAGAIN;
}
dev_dbg(dev->dev,
"Target found - supported protocols: 0x%x\n",
nfc_tgt.supported_protocols);
dev->tgt_available_prots = nfc_tgt.supported_protocols;
pn533_poll_reset_mod_list(dev);
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, struct sk_buff *resp)
{
u8 nbtg, tg, *tgdata;
int rc, tgdata_len;
/* Toggle the DEP polling */
if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
dev->poll_dep = 1;
nbtg = resp->data[0];
tg = resp->data[1];
tgdata = &resp->data[2];
tgdata_len = resp->len - 2; /* nbtg + tg */
if (nbtg) {
rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
/* We must stop the poll after a valid target found */
if (rc == 0)
return 0;
}
return -EAGAIN;
}
static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
{
struct sk_buff *skb;
u8 *felica, *nfcid3;
u8 *gbytes = dev->gb;
size_t gbytes_len = dev->gb_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 */
unsigned int skb_len = 36 + /*
* mode (1), mifare (6),
* felica (18), nfcid3 (10), gb_len (1)
*/
gbytes_len +
1; /* len Tk*/
skb = pn533_alloc_skb(dev, skb_len);
if (!skb)
return NULL;
/* DEP support only */
skb_put_u8(skb, PN533_INIT_TARGET_DEP);
/* MIFARE params */
skb_put_data(skb, mifare_params, 6);
/* Felica params */
felica = skb_put_data(skb, felica_params, 18);
get_random_bytes(felica + 2, 6);
/* NFCID3 */
nfcid3 = skb_put_zero(skb, 10);
memcpy(nfcid3, felica, 8);
/* General bytes */
skb_put_u8(skb, gbytes_len);
skb_put_data(skb, gbytes, gbytes_len);
/* Len Tk */
skb_put_u8(skb, 0);
return skb;
}
static void pn533_wq_tm_mi_recv(struct work_struct *work);
static struct sk_buff *pn533_build_response(struct pn533 *dev);
static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
struct sk_buff *skb;
u8 status, ret, mi;
int rc;
if (IS_ERR(resp)) {
skb_queue_purge(&dev->resp_q);
return PTR_ERR(resp);
}
status = resp->data[0];
ret = status & PN533_CMD_RET_MASK;
mi = status & PN533_CMD_MI_MASK;
skb_pull(resp, sizeof(status));
if (ret != PN533_CMD_RET_SUCCESS) {
rc = -EIO;
goto error;
}
skb_queue_tail(&dev->resp_q, resp);
if (mi) {
queue_work(dev->wq, &dev->mi_tm_rx_work);
return -EINPROGRESS;
}
skb = pn533_build_response(dev);
if (!skb) {
rc = -EIO;
goto error;
}
return nfc_tm_data_received(dev->nfc_dev, skb);
error:
nfc_tm_deactivated(dev->nfc_dev);
dev->tgt_mode = 0;
skb_queue_purge(&dev->resp_q);
dev_kfree_skb(resp);
return rc;
}
static void pn533_wq_tm_mi_recv(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
struct sk_buff *skb;
int rc;
skb = pn533_alloc_skb(dev, 0);
if (!skb)
return;
rc = pn533_send_cmd_direct_async(dev,
PN533_CMD_TG_GET_DATA,
skb,
pn533_tm_get_data_complete,
NULL);
if (rc < 0)
dev_kfree_skb(skb);
}
static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp);
static void pn533_wq_tm_mi_send(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
struct sk_buff *skb;
int rc;
/* Grab the first skb in the queue */
skb = skb_dequeue(&dev->fragment_skb);
if (skb == NULL) { /* No more data */
/* Reset the queue for future use */
skb_queue_head_init(&dev->fragment_skb);
goto error;
}
/* last entry - remove MI bit */
if (skb_queue_len(&dev->fragment_skb) == 0) {
rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
skb, pn533_tm_send_complete, NULL);
} else
rc = pn533_send_cmd_direct_async(dev,
PN533_CMD_TG_SET_META_DATA,
skb, pn533_tm_send_complete, NULL);
if (rc == 0) /* success */
return;
dev_err(dev->dev,
"Error %d when trying to perform set meta data_exchange", rc);
dev_kfree_skb(skb);
error:
dev->phy_ops->send_ack(dev, GFP_KERNEL);
queue_work(dev->wq, &dev->cmd_work);
}
static void pn533_wq_tg_get_data(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, tg_work);
struct sk_buff *skb;
int rc;
skb = pn533_alloc_skb(dev, 0);
if (!skb)
return;
rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
pn533_tm_get_data_complete, NULL);
if (rc < 0)
dev_kfree_skb(skb);
}
#define ATR_REQ_GB_OFFSET 17
static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
{
u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
size_t gb_len;
int rc;
if (resp->len < ATR_REQ_GB_OFFSET + 1)
return -EINVAL;
mode = resp->data[0];
cmd = &resp->data[1];
dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
mode, resp->len);
if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
PN533_INIT_TARGET_RESP_ACTIVE)
comm_mode = NFC_COMM_ACTIVE;
if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
return -EOPNOTSUPP;
gb = cmd + ATR_REQ_GB_OFFSET;
gb_len = resp->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_err(dev->dev,
"Error when signaling target activation\n");
return rc;
}
dev->tgt_mode = 1;
queue_work(dev->wq, &dev->tg_work);
return 0;
}
static void pn533_listen_mode_timer(struct timer_list *t)
{
struct pn533 *dev = from_timer(dev, t, listen_timer);
dev->cancel_listen = 1;
pn533_poll_next_mod(dev);
queue_delayed_work(dev->wq, &dev->poll_work,
msecs_to_jiffies(PN533_POLL_INTERVAL));
}
static int pn533_rf_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
int rc = 0;
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
nfc_err(dev->dev, "RF setting error %d\n", rc);
return rc;
}
queue_delayed_work(dev->wq, &dev->poll_work,
msecs_to_jiffies(PN533_POLL_INTERVAL));
dev_kfree_skb(resp);
return rc;
}
static void pn533_wq_rf(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, rf_work);
struct sk_buff *skb;
int rc;
skb = pn533_alloc_skb(dev, 2);
if (!skb)
return;
skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
pn533_rf_complete, NULL);
if (rc < 0) {
dev_kfree_skb(skb);
nfc_err(dev->dev, "RF setting error %d\n", rc);
}
}
static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
struct pn533_cmd_jump_dep_response *rsp;
struct nfc_target nfc_target;
u8 target_gt_len;
int rc;
if (IS_ERR(resp))
return PTR_ERR(resp);
rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
rc = rsp->status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS) {
/* Not target found, turn radio off */
queue_work(dev->wq, &dev->rf_work);
dev_kfree_skb(resp);
return 0;
}
dev_dbg(dev->dev, "Creating new target");
nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
nfc_target.nfcid1_len = 10;
memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
if (rc)
goto error;
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 = resp->len - 17;
rc = nfc_set_remote_general_bytes(dev->nfc_dev,
rsp->gt, target_gt_len);
if (!rc) {
rc = nfc_dep_link_is_up(dev->nfc_dev,
dev->nfc_dev->targets[0].idx,
0, NFC_RF_INITIATOR);
if (!rc)
pn533_poll_reset_mod_list(dev);
}
error:
dev_kfree_skb(resp);
return rc;
}
#define PASSIVE_DATA_LEN 5
static int pn533_poll_dep(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct sk_buff *skb;
int rc, skb_len;
u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
if (!dev->gb) {
dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
if (!dev->gb || !dev->gb_len) {
dev->poll_dep = 0;
queue_work(dev->wq, &dev->rf_work);
}
}
skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
skb_len += PASSIVE_DATA_LEN;
/* NFCID3 */
skb_len += NFC_NFCID3_MAXSIZE;
nfcid3[0] = 0x1;
nfcid3[1] = 0xfe;
get_random_bytes(nfcid3 + 2, 6);
skb = pn533_alloc_skb(dev, skb_len);
if (!skb)
return -ENOMEM;
skb_put_u8(skb, 0x01); /* Active */
skb_put_u8(skb, 0x02); /* 424 kbps */
next = skb_put(skb, 1); /* Next */
*next = 0;
/* Copy passive data */
skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
*next |= 1;
/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
*next |= 2;
skb_put_data(skb, dev->gb, dev->gb_len);
*next |= 4; /* We have some Gi */
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
pn533_poll_dep_complete, NULL);
if (rc < 0)
dev_kfree_skb(skb);
return rc;
}
static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
struct pn532_autopoll_resp *apr;
struct nfc_target nfc_tgt;
u8 nbtg;
int rc;
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
nfc_err(dev->dev, "%s autopoll complete error %d\n",
__func__, rc);
if (rc == -ENOENT) {
if (dev->poll_mod_count != 0)
return rc;
goto stop_poll;
} else if (rc < 0) {
nfc_err(dev->dev,
"Error %d when running autopoll\n", rc);
goto stop_poll;
}
}
nbtg = resp->data[0];
if ((nbtg > 2) || (nbtg <= 0))
return -EAGAIN;
apr = (struct pn532_autopoll_resp *)&resp->data[1];
while (nbtg--) {
memset(&nfc_tgt, 0, sizeof(struct nfc_target));
switch (apr->type) {
case PN532_AUTOPOLL_TYPE_ISOA:
dev_dbg(dev->dev, "ISOA\n");
rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
apr->ln - 1);
break;
case PN532_AUTOPOLL_TYPE_FELICA212:
case PN532_AUTOPOLL_TYPE_FELICA424:
dev_dbg(dev->dev, "FELICA\n");
rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
apr->ln - 1);
break;
case PN532_AUTOPOLL_TYPE_JEWEL:
dev_dbg(dev->dev, "JEWEL\n");
rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
apr->ln - 1);
break;
case PN532_AUTOPOLL_TYPE_ISOB:
dev_dbg(dev->dev, "ISOB\n");
rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
apr->ln - 1);
break;
case PN532_AUTOPOLL_TYPE_MIFARE:
dev_dbg(dev->dev, "Mifare\n");
rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
apr->ln - 1);
break;
default:
nfc_err(dev->dev,
"Unknown current poll modulation\n");
rc = -EPROTO;
}
if (rc)
goto done;
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
nfc_err(dev->dev,
"The Tg found doesn't have the desired protocol\n");
rc = -EAGAIN;
goto done;
}
dev->tgt_available_prots = nfc_tgt.supported_protocols;
apr = (struct pn532_autopoll_resp *)
(apr->tgdata + (apr->ln - 1));
}
pn533_poll_reset_mod_list(dev);
nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
done:
dev_kfree_skb(resp);
return rc;
stop_poll:
nfc_err(dev->dev, "autopoll operation has been stopped\n");
pn533_poll_reset_mod_list(dev);
dev->poll_protocols = 0;
return rc;
}
static int pn533_poll_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
struct pn533_poll_modulations *cur_mod;
int rc;
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
nfc_err(dev->dev, "%s Poll complete error %d\n",
__func__, rc);
if (rc == -ENOENT) {
if (dev->poll_mod_count != 0)
return rc;
goto stop_poll;
} else if (rc < 0) {
nfc_err(dev->dev,
"Error %d when running poll\n", rc);
goto stop_poll;
}
}
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
if (cur_mod->len == 0) { /* Target mode */
del_timer(&dev->listen_timer);
rc = pn533_init_target_complete(dev, resp);
goto done;
}
/* Initiator mode */
rc = pn533_start_poll_complete(dev, resp);
if (!rc)
goto done;
if (!dev->poll_mod_count) {
dev_dbg(dev->dev, "Polling has been stopped\n");
goto done;
}
pn533_poll_next_mod(dev);
/* Not target found, turn radio off */
queue_work(dev->wq, &dev->rf_work);
done:
dev_kfree_skb(resp);
return rc;
stop_poll:
nfc_err(dev->dev, "Polling operation has been stopped\n");
pn533_poll_reset_mod_list(dev);
dev->poll_protocols = 0;
return rc;
}
static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
struct pn533_poll_modulations *mod)
{
struct sk_buff *skb;
skb = pn533_alloc_skb(dev, mod->len);
if (!skb)
return NULL;
skb_put_data(skb, &mod->data, mod->len);
return skb;
}
static int pn533_send_poll_frame(struct pn533 *dev)
{
struct pn533_poll_modulations *mod;
struct sk_buff *skb;
int rc;
u8 cmd_code;
mod = dev->poll_mod_active[dev->poll_mod_curr];
dev_dbg(dev->dev, "%s mod len %d\n",
__func__, mod->len);
if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
dev->poll_dep = 0;
return pn533_poll_dep(dev->nfc_dev);
}
if (mod->len == 0) { /* Listen mode */
cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
skb = pn533_alloc_poll_tg_frame(dev);
} else { /* Polling mode */
cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
skb = pn533_alloc_poll_in_frame(dev, mod);
}
if (!skb) {
nfc_err(dev->dev, "Failed to allocate skb\n");
return -ENOMEM;
}
rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
NULL);
if (rc < 0) {
dev_kfree_skb(skb);
nfc_err(dev->dev, "Polling loop error %d\n", rc);
}
return rc;
}
static void pn533_wq_poll(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
struct pn533_poll_modulations *cur_mod;
int rc;
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
dev_dbg(dev->dev,
"%s cancel_listen %d modulation len %d\n",
__func__, dev->cancel_listen, cur_mod->len);
if (dev->cancel_listen == 1) {
dev->cancel_listen = 0;
dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
}
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);
}
static int pn533_start_poll(struct nfc_dev *nfc_dev,
u32 im_protocols, u32 tm_protocols)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct pn533_poll_modulations *cur_mod;
struct sk_buff *skb;
u8 rand_mod;
int rc;
dev_dbg(dev->dev,
"%s: im protocols 0x%x tm protocols 0x%x\n",
__func__, im_protocols, tm_protocols);
if (dev->tgt_active_prot) {
nfc_err(dev->dev,
"Cannot poll with a target already activated\n");
return -EBUSY;
}
if (dev->tgt_mode) {
nfc_err(dev->dev,
"Cannot poll while already being activated\n");
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_protocols = im_protocols;
dev->listen_protocols = tm_protocols;
if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
skb = pn533_alloc_skb(dev, 4 + 6);
if (!skb)
return -ENOMEM;
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_POLLNR_INFINITE;
*((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
(im_protocols & NFC_PROTO_ISO14443_MASK) &&
(im_protocols & NFC_PROTO_NFC_DEP_MASK))
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_GENERIC_106;
else {
if (im_protocols & NFC_PROTO_MIFARE_MASK)
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_MIFARE;
if (im_protocols & NFC_PROTO_ISO14443_MASK)
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_ISOA;
if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
}
}
if (im_protocols & NFC_PROTO_FELICA_MASK ||
im_protocols & NFC_PROTO_NFC_DEP_MASK) {
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_FELICA212;
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_FELICA424;
}
if (im_protocols & NFC_PROTO_JEWEL_MASK)
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_JEWEL;
if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_ISOB;
if (tm_protocols)
*((u8 *)skb_put(skb, sizeof(u8))) =
PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
pn533_autopoll_complete, NULL);
if (rc < 0)
dev_kfree_skb(skb);
else
dev->poll_mod_count++;
return rc;
}
pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
/* Do not always start polling from the same modulation */
get_random_bytes(&rand_mod, sizeof(rand_mod));
rand_mod %= dev->poll_mod_count;
dev->poll_mod_curr = rand_mod;
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
rc = pn533_send_poll_frame(dev);
/* Start listen timer */
if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
return rc;
}
static void pn533_stop_poll(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
del_timer(&dev->listen_timer);
if (!dev->poll_mod_count) {
dev_dbg(dev->dev,
"Polling operation was not running\n");
return;
}
dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
flush_delayed_work(&dev->poll_work);
pn533_poll_reset_mod_list(dev);
}
static int pn533_activate_target_nfcdep(struct pn533 *dev)
{
struct pn533_cmd_activate_response *rsp;
u16 gt_len;
int rc;
struct sk_buff *skb;
struct sk_buff *resp;
skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
if (!skb)
return -ENOMEM;
skb_put_u8(skb, 1); /* TG */
skb_put_u8(skb, 0); /* Next */
resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
rsp = (struct pn533_cmd_activate_response *)resp->data;
rc = rsp->status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS) {
nfc_err(dev->dev,
"Target activation failed (error 0x%x)\n", rc);
dev_kfree_skb(resp);
return -EIO;
}
/* ATR_RES general bytes are located at offset 16 */
gt_len = resp->len - 16;
rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
dev_kfree_skb(resp);
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;
dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
if (dev->poll_mod_count) {
nfc_err(dev->dev,
"Cannot activate while polling\n");
return -EBUSY;
}
if (dev->tgt_active_prot) {
nfc_err(dev->dev,
"There is already an active target\n");
return -EBUSY;
}
if (!dev->tgt_available_prots) {
nfc_err(dev->dev,
"There is no available target to activate\n");
return -EINVAL;
}
if (!(dev->tgt_available_prots & (1 << protocol))) {
nfc_err(dev->dev,
"Target doesn't support requested proto %u\n",
protocol);
return -EINVAL;
}
if (protocol == NFC_PROTO_NFC_DEP) {
rc = pn533_activate_target_nfcdep(dev);
if (rc) {
nfc_err(dev->dev,
"Activating target with DEP failed %d\n", rc);
return rc;
}
}
dev->tgt_active_prot = protocol;
dev->tgt_available_prots = 0;
return 0;
}
static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
int rc = 0;
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
nfc_err(dev->dev, "Target release error %d\n", rc);
return rc;
}
rc = resp->data[0] & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS)
nfc_err(dev->dev,
"Error 0x%x when releasing the target\n", rc);
dev_kfree_skb(resp);
return rc;
}
static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
struct nfc_target *target, u8 mode)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct sk_buff *skb;
int rc;
if (!dev->tgt_active_prot) {
nfc_err(dev->dev, "There is no active target\n");
return;
}
dev->tgt_active_prot = 0;
skb_queue_purge(&dev->resp_q);
skb = pn533_alloc_skb(dev, sizeof(u8));
if (!skb)
return;
skb_put_u8(skb, 1); /* TG*/
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
pn533_deactivate_target_complete, NULL);
if (rc < 0) {
dev_kfree_skb(skb);
nfc_err(dev->dev, "Target release error %d\n", rc);
}
}
static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
struct pn533_cmd_jump_dep_response *rsp;
u8 target_gt_len;
int rc;
u8 active = *(u8 *)arg;
kfree(arg);
if (IS_ERR(resp))
return PTR_ERR(resp);
if (dev->tgt_available_prots &&
!(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
nfc_err(dev->dev,
"The target does not support DEP\n");
rc = -EINVAL;
goto error;
}
rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
rc = rsp->status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS) {
nfc_err(dev->dev,
"Bringing DEP link up failed (error 0x%x)\n", rc);
goto error;
}
if (!dev->tgt_available_prots) {
struct nfc_target nfc_target;
dev_dbg(dev->dev, "Creating new target\n");
nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
nfc_target.nfcid1_len = 10;
memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
if (rc)
goto error;
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 = resp->len - 17;
rc = nfc_set_remote_general_bytes(dev->nfc_dev,
rsp->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);
error:
dev_kfree_skb(resp);
return rc;
}
static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
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 sk_buff *skb;
int rc, skb_len;
u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
if (dev->poll_mod_count) {
nfc_err(dev->dev,
"Cannot bring the DEP link up while polling\n");
return -EBUSY;
}
if (dev->tgt_active_prot) {
nfc_err(dev->dev,
"There is already an active target\n");
return -EBUSY;
}
skb_len = 3 + gb_len; /* ActPass + BR + Next */
skb_len += PASSIVE_DATA_LEN;
/* NFCID3 */
skb_len += NFC_NFCID3_MAXSIZE;
if (target && !target->nfcid2_len) {
nfcid3[0] = 0x1;
nfcid3[1] = 0xfe;
get_random_bytes(nfcid3 + 2, 6);
}
skb = pn533_alloc_skb(dev, skb_len);
if (!skb)
return -ENOMEM;
skb_put_u8(skb, !comm_mode); /* ActPass */
skb_put_u8(skb, 0x02); /* 424 kbps */
next = skb_put(skb, 1); /* Next */
*next = 0;
/* Copy passive data */
skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
*next |= 1;
/* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
if (target && target->nfcid2_len)
memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
target->nfcid2_len);
else
skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
*next |= 2;
if (gb != NULL && gb_len > 0) {
skb_put_data(skb, gb, gb_len);
*next |= 4; /* We have some Gi */
} else {
*next = 0;
}
arg = kmalloc(sizeof(*arg), GFP_KERNEL);
if (!arg) {
dev_kfree_skb(skb);
return -ENOMEM;
}
*arg = !comm_mode;
pn533_rf_field(dev->nfc_dev, 0);
rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
pn533_in_dep_link_up_complete, arg);
if (rc < 0) {
dev_kfree_skb(skb);
kfree(arg);
}
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)
dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
dev->tgt_active_prot = 0;
dev->tgt_mode = 0;
skb_queue_purge(&dev->resp_q);
return 0;
}
struct pn533_data_exchange_arg {
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;
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;
dev_dbg(dev->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,
struct sk_buff *resp)
{
struct pn533_data_exchange_arg *arg = _arg;
struct sk_buff *skb;
int rc = 0;
u8 status, ret, mi;
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
goto _error;
}
status = resp->data[0];
ret = status & PN533_CMD_RET_MASK;
mi = status & PN533_CMD_MI_MASK;
skb_pull(resp, sizeof(status));
if (ret != PN533_CMD_RET_SUCCESS) {
nfc_err(dev->dev,
"Exchanging data failed (error 0x%x)\n", ret);
rc = -EIO;
goto error;
}
skb_queue_tail(&dev->resp_q, resp);
if (mi) {
dev->cmd_complete_mi_arg = arg;
queue_work(dev->wq, &dev->mi_rx_work);
return -EINPROGRESS;
}
/* Prepare for the next round */
if (skb_queue_len(&dev->fragment_skb) > 0) {
dev->cmd_complete_dep_arg = arg;
queue_work(dev->wq, &dev->mi_tx_work);
return -EINPROGRESS;
}
skb = pn533_build_response(dev);
if (!skb) {
rc = -ENOMEM;
goto error;
}
arg->cb(arg->cb_context, skb, 0);
kfree(arg);
return 0;
error:
dev_kfree_skb(resp);
_error:
skb_queue_purge(&dev->resp_q);
arg->cb(arg->cb_context, NULL, rc);
kfree(arg);
return rc;
}
/*
* Receive an incoming pn533 frame. skb contains only header and payload.
* If skb == NULL, it is a notification that the link below is dead.
*/
void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
{
if (!dev->cmd)
goto sched_wq;
dev->cmd->status = status;
if (status != 0) {
dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
goto sched_wq;
}
if (skb == NULL) {
dev_err(dev->dev, "NULL Frame -> link is dead\n");
goto sched_wq;
}
if (pn533_rx_frame_is_ack(skb->data)) {
dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
dev_kfree_skb(skb);
return;
}
print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
dev->ops->rx_frame_size(skb->data), false);
if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
nfc_err(dev->dev, "Received an invalid frame\n");
dev->cmd->status = -EIO;
} else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
nfc_err(dev->dev, "It it not the response to the last command\n");
dev->cmd->status = -EIO;
}
dev->cmd->resp = skb;
sched_wq:
queue_work(dev->wq, &dev->cmd_complete_work);
}
EXPORT_SYMBOL(pn533_recv_frame);
/* Split the Tx skb into small chunks */
static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
{
struct sk_buff *frag;
int frag_size;
do {
/* Remaining size */
if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
frag_size = PN533_CMD_DATAFRAME_MAXLEN;
else
frag_size = skb->len;
/* Allocate and reserve */
frag = pn533_alloc_skb(dev, frag_size);
if (!frag) {
skb_queue_purge(&dev->fragment_skb);
return -ENOMEM;
}
if (!dev->tgt_mode) {
/* Reserve the TG/MI byte */
skb_reserve(frag, 1);
/* MI + TG */
if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
*(u8 *)skb_push(frag, sizeof(u8)) =
(PN533_CMD_MI_MASK | 1);
else
*(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
}
skb_put_data(frag, skb->data, frag_size);
/* Reduce the size of incoming buffer */
skb_pull(skb, frag_size);
/* Add this to skb_queue */
skb_queue_tail(&dev->fragment_skb, frag);
} while (skb->len > 0);
dev_kfree_skb(skb);
return skb_queue_len(&dev->fragment_skb);
}
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_data_exchange_arg *arg = NULL;
int rc;
if (!dev->tgt_active_prot) {
nfc_err(dev->dev,
"Can't exchange data if there is no active target\n");
rc = -EINVAL;
goto error;
}
arg = kmalloc(sizeof(*arg), GFP_KERNEL);
if (!arg) {
rc = -ENOMEM;
goto error;
}
arg->cb = cb;
arg->cb_context = cb_context;
switch (dev->device_type) {
case PN533_DEVICE_PASORI:
if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
skb,
pn533_data_exchange_complete,
arg);
break;
}
fallthrough;
default:
/* jumbo frame ? */
if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
rc = pn533_fill_fragment_skbs(dev, skb);
if (rc < 0)
goto error;
skb = skb_dequeue(&dev->fragment_skb);
if (!skb) {
rc = -EIO;
goto error;
}
} else {
*(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
}
rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
skb, pn533_data_exchange_complete,
arg);
break;
}
if (rc < 0) /* rc from send_async */
goto error;
return 0;
error:
kfree(arg);
dev_kfree_skb(skb);
return rc;
}
static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
struct sk_buff *resp)
{
u8 status;
if (IS_ERR(resp))
return PTR_ERR(resp);
status = resp->data[0];
/* Prepare for the next round */
if (skb_queue_len(&dev->fragment_skb) > 0) {
queue_work(dev->wq, &dev->mi_tm_tx_work);
return -EINPROGRESS;
}
dev_kfree_skb(resp);
if (status != 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);
int rc;
/* let's split in multiple chunks if size's too big */
if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
rc = pn533_fill_fragment_skbs(dev, skb);
if (rc < 0)
goto error;
/* get the first skb */
skb = skb_dequeue(&dev->fragment_skb);
if (!skb) {
rc = -EIO;
goto error;
}
rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
pn533_tm_send_complete, NULL);
} else {
/* Send th skb */
rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
pn533_tm_send_complete, NULL);
}
error:
if (rc < 0) {
dev_kfree_skb(skb);
skb_queue_purge(&dev->fragment_skb);
}
return rc;
}
static void pn533_wq_mi_recv(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
struct sk_buff *skb;
int rc;
skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
if (!skb)
goto error;
switch (dev->device_type) {
case PN533_DEVICE_PASORI:
if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
rc = pn533_send_cmd_direct_async(dev,
PN533_CMD_IN_COMM_THRU,
skb,
pn533_data_exchange_complete,
dev->cmd_complete_mi_arg);
break;
}
fallthrough;
default:
skb_put_u8(skb, 1); /*TG*/
rc = pn533_send_cmd_direct_async(dev,
PN533_CMD_IN_DATA_EXCHANGE,
skb,
pn533_data_exchange_complete,
dev->cmd_complete_mi_arg);
break;
}
if (rc == 0) /* success */
return;
nfc_err(dev->dev,
"Error %d when trying to perform data_exchange\n", rc);
dev_kfree_skb(skb);
kfree(dev->cmd_complete_mi_arg);
error:
dev->phy_ops->send_ack(dev, GFP_KERNEL);
queue_work(dev->wq, &dev->cmd_work);
}
static void pn533_wq_mi_send(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
struct sk_buff *skb;
int rc;
/* Grab the first skb in the queue */
skb = skb_dequeue(&dev->fragment_skb);
if (skb == NULL) { /* No more data */
/* Reset the queue for future use */
skb_queue_head_init(&dev->fragment_skb);
goto error;
}
switch (dev->device_type) {
case PN533_DEVICE_PASORI:
if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
rc = -EIO;
break;
}
rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
skb,
pn533_data_exchange_complete,
dev->cmd_complete_dep_arg);
break;
default:
/* Still some fragments? */
rc = pn533_send_cmd_direct_async(dev,
PN533_CMD_IN_DATA_EXCHANGE,
skb,
pn533_data_exchange_complete,
dev->cmd_complete_dep_arg);
break;
}
if (rc == 0) /* success */
return;
nfc_err(dev->dev,
"Error %d when trying to perform data_exchange\n", rc);
dev_kfree_skb(skb);
kfree(dev->cmd_complete_dep_arg);
error:
dev->phy_ops->send_ack(dev, GFP_KERNEL);
queue_work(dev->wq, &dev->cmd_work);
}
static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
u8 cfgdata_len)
{
struct sk_buff *skb;
struct sk_buff *resp;
int skb_len;
skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
skb = pn533_alloc_skb(dev, skb_len);
if (!skb)
return -ENOMEM;
skb_put_u8(skb, cfgitem);
skb_put_data(skb, cfgdata, cfgdata_len);
resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
dev_kfree_skb(resp);
return 0;
}
static int pn533_get_firmware_version(struct pn533 *dev,
struct pn533_fw_version *fv)
{
struct sk_buff *skb;
struct sk_buff *resp;
skb = pn533_alloc_skb(dev, 0);
if (!skb)
return -ENOMEM;
resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
fv->ic = resp->data[0];
fv->ver = resp->data[1];
fv->rev = resp->data[2];
fv->support = resp->data[3];
dev_kfree_skb(resp);
return 0;
}
static int pn533_pasori_fw_reset(struct pn533 *dev)
{
struct sk_buff *skb;
struct sk_buff *resp;
skb = pn533_alloc_skb(dev, sizeof(u8));
if (!skb)
return -ENOMEM;
skb_put_u8(skb, 0x1);
resp = pn533_send_cmd_sync(dev, 0x18, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
dev_kfree_skb(resp);
return 0;
}
static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
u8 rf_field = !!rf;
int rc;
rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
(u8 *)&rf_field, 1);
if (rc) {
nfc_err(dev->dev, "Error on setting RF field\n");
return rc;
}
return 0;
}
static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct sk_buff *skb;
struct sk_buff *resp;
skb = pn533_alloc_skb(dev, 1);
if (!skb)
return -ENOMEM;
skb_put_u8(skb, 0x01);
resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
dev_kfree_skb(resp);
return 0;
}
static int pn533_dev_up(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
int rc;
if (dev->phy_ops->dev_up) {
rc = dev->phy_ops->dev_up(dev);
if (rc)
return rc;
}
if ((dev->device_type == PN533_DEVICE_PN532) ||
(dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
rc = pn532_sam_configuration(nfc_dev);
if (rc)
return rc;
}
return pn533_rf_field(nfc_dev, 1);
}
static int pn533_dev_down(struct nfc_dev *nfc_dev)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
int ret;
ret = pn533_rf_field(nfc_dev, 0);
if (dev->phy_ops->dev_down && !ret)
ret = dev->phy_ops->dev_down(dev);
return ret;
}
static const struct nfc_ops pn533_nfc_ops = {
.dev_up = pn533_dev_up,
.dev_down = pn533_dev_down,
.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:
case PN533_DEVICE_PASORI:
case PN533_DEVICE_ACR122U:
case PN533_DEVICE_PN532:
case PN533_DEVICE_PN532_AUTOPOLL:
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_err(dev->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_err(dev->dev,
"Error on setting MAX_RETRIES config\n");
return rc;
}
rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
(u8 *)&timing, sizeof(timing));
if (rc) {
nfc_err(dev->dev, "Error on setting RF timings\n");
return rc;
}
switch (dev->device_type) {
case PN533_DEVICE_STD:
case PN533_DEVICE_PN532:
case PN533_DEVICE_PN532_AUTOPOLL:
break;
case PN533_DEVICE_PASORI:
pn533_pasori_fw_reset(dev);
rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
pasori_cfg, 3);
if (rc) {
nfc_err(dev->dev,
"Error while settings PASORI config\n");
return rc;
}
pn533_pasori_fw_reset(dev);
break;
}
return 0;
}
int pn533_finalize_setup(struct pn533 *dev)
{
struct pn533_fw_version fw_ver;
int rc;
memset(&fw_ver, 0, sizeof(fw_ver));
rc = pn533_get_firmware_version(dev, &fw_ver);
if (rc) {
nfc_err(dev->dev, "Unable to get FW version\n");
return rc;
}
nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
fw_ver.ic, fw_ver.ver, fw_ver.rev);
rc = pn533_setup(dev);
if (rc)
return rc;
return 0;
}
EXPORT_SYMBOL_GPL(pn533_finalize_setup);
struct pn533 *pn53x_common_init(u32 device_type,
enum pn533_protocol_type protocol_type,
void *phy,
const struct pn533_phy_ops *phy_ops,
struct pn533_frame_ops *fops,
struct device *dev)
{
struct pn533 *priv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return ERR_PTR(-ENOMEM);
priv->phy = phy;
priv->phy_ops = phy_ops;
priv->dev = dev;
if (fops != NULL)
priv->ops = fops;
else
priv->ops = &pn533_std_frame_ops;
priv->protocol_type = protocol_type;
priv->device_type = device_type;
mutex_init(&priv->cmd_lock);
INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
INIT_WORK(&priv->rf_work, pn533_wq_rf);
priv->wq = alloc_ordered_workqueue("pn533", 0);
if (priv->wq == NULL)
goto error;
timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
skb_queue_head_init(&priv->resp_q);
skb_queue_head_init(&priv->fragment_skb);
INIT_LIST_HEAD(&priv->cmd_queue);
return priv;
error:
kfree(priv);
return ERR_PTR(-ENOMEM);
}
EXPORT_SYMBOL_GPL(pn53x_common_init);
void pn53x_common_clean(struct pn533 *priv)
{
struct pn533_cmd *cmd, *n;
flush_delayed_work(&priv->poll_work);
destroy_workqueue(priv->wq);
skb_queue_purge(&priv->resp_q);
del_timer(&priv->listen_timer);
list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
list_del(&cmd->queue);
kfree(cmd);
}
kfree(priv);
}
EXPORT_SYMBOL_GPL(pn53x_common_clean);
int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
struct device *parent)
{
priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
priv->ops->tx_header_len +
PN533_CMD_DATAEXCH_HEAD_LEN,
priv->ops->tx_tail_len);
if (!priv->nfc_dev)
return -ENOMEM;
nfc_set_parent_dev(priv->nfc_dev, parent);
nfc_set_drvdata(priv->nfc_dev, priv);
return 0;
}
EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
struct device *parent)
{
int rc;
rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
if (rc)
return rc;
rc = nfc_register_device(priv->nfc_dev);
if (rc)
nfc_free_device(priv->nfc_dev);
return rc;
}
EXPORT_SYMBOL_GPL(pn53x_register_nfc);
void pn53x_unregister_nfc(struct pn533 *priv)
{
nfc_unregister_device(priv->nfc_dev);
nfc_free_device(priv->nfc_dev);
}
EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
MODULE_DESCRIPTION("PN533 driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
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