| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Samuel Ortiz | 3274 | 26.36% | 34 | 30.63% |
| Aloisio Almeida Jr | 2291 | 18.44% | 1 | 0.90% |
| Waldemar Rymarkiewicz | 2055 | 16.54% | 33 | 29.73% |
| Michael Thalmeier | 1966 | 15.83% | 7 | 6.31% |
| Lars Poeschel | 1424 | 11.46% | 4 | 3.60% |
| Olivier Guiter | 978 | 7.87% | 5 | 4.50% |
| Andrey Rusalin | 203 | 1.63% | 2 | 1.80% |
| Joe Perches | 108 | 0.87% | 4 | 3.60% |
| Johannes Berg | 54 | 0.43% | 4 | 3.60% |
| Kees Cook | 18 | 0.14% | 2 | 1.80% |
| Eric Lapuyade | 16 | 0.13% | 1 | 0.90% |
| Julia Lawall | 7 | 0.06% | 1 | 0.90% |
| Thierry Escande | 6 | 0.05% | 2 | 1.80% |
| Gustavo A. R. Silva | 4 | 0.03% | 1 | 0.90% |
| Szymon Janc | 3 | 0.02% | 2 | 1.80% |
| Christophe Ricard | 3 | 0.02% | 1 | 0.90% |
| Axel Lin | 2 | 0.02% | 2 | 1.80% |
| Tejun Heo | 2 | 0.02% | 1 | 0.90% |
| Sachin Kamat | 2 | 0.02% | 1 | 0.90% |
| Thomas Gleixner | 2 | 0.02% | 1 | 0.90% |
| Wei Yongjun | 2 | 0.02% | 1 | 0.90% |
| Masahiro Yamada | 1 | 0.01% | 1 | 0.90% |
| Total | 12421 | 111 |
// 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) { int rc; rc = __pn533_send_async(dev, cmd_code, req, complete_cb, complete_cb_context); 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) { int rc; rc = __pn533_send_async(dev, cmd_code, req, complete_cb, complete_cb_context); return rc; } /* * pn533_send_cmd_direct_async * * The function sends a piority 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 succesfult 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; 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); /* 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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_dbg(dev->dev, "Listen mode timeout\n"); 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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}; dev_dbg(dev->dev, "%s", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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}; dev_dbg(dev->dev, "%s\n", __func__); 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); dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->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; 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; dev_dbg(dev->dev, "%s\n", __func__); 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) { pr_err("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); break; } 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); /* 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); /* 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; dev_dbg(dev->dev, "%s\n", __func__); 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; dev_dbg(dev->dev, "%s\n", __func__); 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 rc; } 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 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, struct pn533_phy_ops *phy_ops, struct pn533_frame_ops *fops, struct device *dev) { struct pn533 *priv; int rc = -ENOMEM; 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(rc); } 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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