| // 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; |
| |
| |
| /* 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; |
| |
| 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; |
| |
| 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_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; |
| 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; |
| } |
| |
| pn533_poll_create_mod_list(dev, im_protocols, tm_protocols); |
| dev->poll_protocols = im_protocols; |
| dev->listen_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; |
| } |
| /* fall through */ |
| 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; |
| } |
| /* fall through */ |
| 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); |
| |
| if (dev->device_type == PN533_DEVICE_PN532) { |
| int 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) |
| { |
| return pn533_rf_field(nfc_dev, 0); |
| } |
| |
| 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: |
| 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: |
| 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 *pn533_register_device(u32 device_type, |
| u32 protocols, |
| enum pn533_protocol_type protocol_type, |
| void *phy, |
| struct pn533_phy_ops *phy_ops, |
| struct pn533_frame_ops *fops, |
| struct device *dev, |
| struct device *parent) |
| { |
| 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); |
| |
| 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) { |
| rc = -ENOMEM; |
| goto destroy_wq; |
| } |
| |
| nfc_set_parent_dev(priv->nfc_dev, parent); |
| nfc_set_drvdata(priv->nfc_dev, priv); |
| |
| rc = nfc_register_device(priv->nfc_dev); |
| if (rc) |
| goto free_nfc_dev; |
| |
| return priv; |
| |
| free_nfc_dev: |
| nfc_free_device(priv->nfc_dev); |
| |
| destroy_wq: |
| destroy_workqueue(priv->wq); |
| error: |
| kfree(priv); |
| return ERR_PTR(rc); |
| } |
| EXPORT_SYMBOL_GPL(pn533_register_device); |
| |
| void pn533_unregister_device(struct pn533 *priv) |
| { |
| struct pn533_cmd *cmd, *n; |
| |
| nfc_unregister_device(priv->nfc_dev); |
| nfc_free_device(priv->nfc_dev); |
| |
| 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(pn533_unregister_device); |
| |
| |
| 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"); |