diff options
Diffstat (limited to 'drivers/nfc')
| -rw-r--r-- | drivers/nfc/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/nfc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/nfc/pn533.c | 1632 |
3 files changed, 1643 insertions, 0 deletions
diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig index 780928918fc3..2acff4307ca4 100644 --- a/drivers/nfc/Kconfig +++ b/drivers/nfc/Kconfig @@ -17,4 +17,14 @@ config PN544_NFC To compile this driver as a module, choose m here. The module will be called pn544. +config NFC_PN533 + tristate "NXP PN533 USB driver" + depends on USB + help + NXP PN533 USB driver. + This driver provides support for NFC NXP PN533 devices. + + Say Y here to compile support for PN533 devices into the + kernel or say M to compile it as module (pn533). + endmenu diff --git a/drivers/nfc/Makefile b/drivers/nfc/Makefile index 25296f04ccbe..8ef446d2c1bd 100644 --- a/drivers/nfc/Makefile +++ b/drivers/nfc/Makefile @@ -3,5 +3,6 @@ # obj-$(CONFIG_PN544_NFC) += pn544.o +obj-$(CONFIG_NFC_PN533) += pn533.o ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c new file mode 100644 index 000000000000..037231540719 --- /dev/null +++ b/drivers/nfc/pn533.c @@ -0,0 +1,1632 @@ +/* + * Copyright (C) 2011 Instituto Nokia de Tecnologia + * + * Authors: + * Lauro Ramos Venancio <lauro.venancio@openbossa.org> + * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the + * Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/usb.h> +#include <linux/nfc.h> +#include <linux/netdevice.h> +#include <net/nfc.h> + +#define VERSION "0.1" + +#define PN533_VENDOR_ID 0x4CC +#define PN533_PRODUCT_ID 0x2533 + +#define SCM_VENDOR_ID 0x4E6 +#define SCL3711_PRODUCT_ID 0x5591 + +static const struct usb_device_id pn533_table[] = { + { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID) }, + { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID) }, + { } +}; +MODULE_DEVICE_TABLE(usb, pn533_table); + +/* frame definitions */ +#define PN533_FRAME_TAIL_SIZE 2 +#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \ + PN533_FRAME_TAIL_SIZE) +#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1) +#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen]) +#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1]) + +/* start of frame */ +#define PN533_SOF 0x00FF + +/* frame identifier: in/out/error */ +#define PN533_FRAME_IDENTIFIER(f) (f->data[0]) +#define PN533_DIR_OUT 0xD4 +#define PN533_DIR_IN 0xD5 + +/* PN533 Commands */ +#define PN533_FRAME_CMD(f) (f->data[1]) +#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2]) +#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2) + +#define PN533_CMD_GET_FIRMWARE_VERSION 0x02 +#define PN533_CMD_RF_CONFIGURATION 0x32 +#define PN533_CMD_IN_DATA_EXCHANGE 0x40 +#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A +#define PN533_CMD_IN_ATR 0x50 +#define PN533_CMD_IN_RELEASE 0x52 + +#define PN533_CMD_RESPONSE(cmd) (cmd + 1) + +/* PN533 Return codes */ +#define PN533_CMD_RET_MASK 0x3F +#define PN533_CMD_MI_MASK 0x40 +#define PN533_CMD_RET_SUCCESS 0x00 + +struct pn533; + +typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, + u8 *params, int params_len); + +/* 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_MAX_RETRIES 0x05 + +#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; + +/* PN533_CMD_IN_LIST_PASSIVE_TARGET */ + +/* felica commands opcode */ +#define PN533_FELICA_OPC_SENSF_REQ 0 +#define PN533_FELICA_OPC_SENSF_RES 1 +/* felica SENSF_REQ parameters */ +#define PN533_FELICA_SENSF_SC_ALL 0xFFFF +#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0 +#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1 +#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2 + +/* type B initiator_data values */ +#define PN533_TYPE_B_AFI_ALL_FAMILIES 0 +#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0 +#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1 + +union pn533_cmd_poll_initdata { + struct { + u8 afi; + u8 polling_method; + } __packed type_b; + struct { + u8 opcode; + __be16 sc; + u8 rc; + u8 tsn; + } __packed felica; +}; + +/* Poll modulations */ +enum { + PN533_POLL_MOD_106KBPS_A, + PN533_POLL_MOD_212KBPS_FELICA, + PN533_POLL_MOD_424KBPS_FELICA, + PN533_POLL_MOD_106KBPS_JEWEL, + PN533_POLL_MOD_847KBPS_B, + + __PN533_POLL_MOD_AFTER_LAST, +}; +#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1) + +struct pn533_poll_modulations { + struct { + u8 maxtg; + u8 brty; + union pn533_cmd_poll_initdata initiator_data; + } __packed data; + u8 len; +}; + +const struct pn533_poll_modulations poll_mod[] = { + [PN533_POLL_MOD_106KBPS_A] = { + .data = { + .maxtg = 1, + .brty = 0, + }, + .len = 2, + }, + [PN533_POLL_MOD_212KBPS_FELICA] = { + .data = { + .maxtg = 1, + .brty = 1, + .initiator_data.felica = { + .opcode = PN533_FELICA_OPC_SENSF_REQ, + .sc = PN533_FELICA_SENSF_SC_ALL, + .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, + .tsn = 0, + }, + }, + .len = 7, + }, + [PN533_POLL_MOD_424KBPS_FELICA] = { + .data = { + .maxtg = 1, + .brty = 2, + .initiator_data.felica = { + .opcode = PN533_FELICA_OPC_SENSF_REQ, + .sc = PN533_FELICA_SENSF_SC_ALL, + .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, + .tsn = 0, + }, + }, + .len = 7, + }, + [PN533_POLL_MOD_106KBPS_JEWEL] = { + .data = { + .maxtg = 1, + .brty = 4, + }, + .len = 2, + }, + [PN533_POLL_MOD_847KBPS_B] = { + .data = { + .maxtg = 1, + .brty = 8, + .initiator_data.type_b = { + .afi = PN533_TYPE_B_AFI_ALL_FAMILIES, + .polling_method = + PN533_TYPE_B_POLL_METHOD_TIMESLOT, + }, + }, + .len = 3, + }, +}; + +/* PN533_CMD_IN_ATR */ + +struct pn533_cmd_activate_param { + u8 tg; + u8 next; +} __packed; + +struct pn533_cmd_activate_response { + u8 status; + u8 nfcid3t[10]; + u8 didt; + u8 bst; + u8 brt; + u8 to; + u8 ppt; + /* optional */ + u8 gt[]; +} __packed; + + +struct pn533 { + struct usb_device *udev; + struct usb_interface *interface; + struct nfc_dev *nfc_dev; + + struct urb *out_urb; + int out_maxlen; + struct pn533_frame *out_frame; + + struct urb *in_urb; + int in_maxlen; + struct pn533_frame *in_frame; + + struct tasklet_struct tasklet; + struct pn533_frame *tklt_in_frame; + int tklt_in_error; + + pn533_cmd_complete_t cmd_complete; + void *cmd_complete_arg; + struct semaphore cmd_lock; + u8 cmd; + + struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1]; + u8 poll_mod_count; + u8 poll_mod_curr; + u32 poll_protocols; + + u8 tgt_available_prots; + u8 tgt_active_prot; +}; + +struct pn533_frame { + u8 preamble; + __be16 start_frame; + u8 datalen; + u8 datalen_checksum; + u8 data[]; +} __packed; + +/* The rule: value + checksum = 0 */ +static inline u8 pn533_checksum(u8 value) +{ + return ~value + 1; +} + +/* The rule: sum(data elements) + checksum = 0 */ +static u8 pn533_data_checksum(u8 *data, int datalen) +{ + u8 sum = 0; + int i; + + for (i = 0; i < datalen; i++) + sum += data[i]; + + return pn533_checksum(sum); +} + +/** + * pn533_tx_frame_ack - create a ack frame + * @frame: The frame to be set as ack + * + * Ack is different type of standard frame. As a standard frame, it has + * preamble and start_frame. However the checksum of this frame must fail, + * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test + * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack. + * After datalen_checksum field, the postamble is placed. + */ +static void pn533_tx_frame_ack(struct pn533_frame *frame) +{ + frame->preamble = 0; + frame->start_frame = cpu_to_be16(PN533_SOF); + frame->datalen = 0; + frame->datalen_checksum = 0xFF; + /* data[0] is used as postamble */ + frame->data[0] = 0; +} + +static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd) +{ + frame->preamble = 0; + frame->start_frame = cpu_to_be16(PN533_SOF); + PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT; + PN533_FRAME_CMD(frame) = cmd; + frame->datalen = 2; +} + +static void pn533_tx_frame_finish(struct pn533_frame *frame) +{ + frame->datalen_checksum = pn533_checksum(frame->datalen); + + PN533_FRAME_CHECKSUM(frame) = + pn533_data_checksum(frame->data, frame->datalen); + + PN533_FRAME_POSTAMBLE(frame) = 0; +} + +static bool pn533_rx_frame_is_valid(struct pn533_frame *frame) +{ + u8 checksum; + + if (frame->start_frame != cpu_to_be16(PN533_SOF)) + return false; + + checksum = pn533_checksum(frame->datalen); + if (checksum != frame->datalen_checksum) + return false; + + checksum = pn533_data_checksum(frame->data, frame->datalen); + if (checksum != PN533_FRAME_CHECKSUM(frame)) + return false; + + return true; +} + +static bool pn533_rx_frame_is_ack(struct pn533_frame *frame) +{ + if (frame->start_frame != cpu_to_be16(PN533_SOF)) + return false; + + if (frame->datalen != 0 || frame->datalen_checksum != 0xFF) + return false; + + return true; +} + +static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd) +{ + return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd)); +} + +static void pn533_tasklet_cmd_complete(unsigned long arg) +{ + struct pn533 *dev = (struct pn533 *) arg; + struct pn533_frame *in_frame = dev->tklt_in_frame; + int rc; + + if (dev->tklt_in_error) + rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL, + dev->tklt_in_error); + else + rc = dev->cmd_complete(dev, dev->cmd_complete_arg, + PN533_FRAME_CMD_PARAMS_PTR(in_frame), + PN533_FRAME_CMD_PARAMS_LEN(in_frame)); + + if (rc != -EINPROGRESS) + up(&dev->cmd_lock); +} + +static void pn533_recv_response(struct urb *urb) +{ + struct pn533 *dev = urb->context; + struct pn533_frame *in_frame; + + dev->tklt_in_frame = NULL; + + switch (urb->status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" + " status: %d", urb->status); + dev->tklt_in_error = urb->status; + goto sched_tasklet; + default: + nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:" + " %d", urb->status); + dev->tklt_in_error = urb->status; + goto sched_tasklet; + } + + in_frame = dev->in_urb->transfer_buffer; + + if (!pn533_rx_frame_is_valid(in_frame)) { + nfc_dev_err(&dev->interface->dev, "Received an invalid frame"); + dev->tklt_in_error = -EIO; + goto sched_tasklet; + } + + if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) { + nfc_dev_err(&dev->interface->dev, "The received frame is not " + "response to the last command"); + dev->tklt_in_error = -EIO; + goto sched_tasklet; + } + + nfc_dev_dbg(&dev->interface->dev, "Received a valid frame"); + dev->tklt_in_error = 0; + dev->tklt_in_frame = in_frame; + +sched_tasklet: + tasklet_schedule(&dev->tasklet); +} + +static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags) +{ + dev->in_urb->complete = pn533_recv_response; + + return usb_submit_urb(dev->in_urb, flags); +} + +static void pn533_recv_ack(struct urb *urb) +{ + struct pn533 *dev = urb->context; + struct pn533_frame *in_frame; + int rc; + + switch (urb->status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" + " status: %d", urb->status); + dev->tklt_in_error = urb->status; + goto sched_tasklet; + default: + nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:" + " %d", urb->status); + dev->tklt_in_error = urb->status; + goto sched_tasklet; + } + + in_frame = dev->in_urb->transfer_buffer; + + if (!pn533_rx_frame_is_ack(in_frame)) { + nfc_dev_err(&dev->interface->dev, "Received an invalid ack"); + dev->tklt_in_error = -EIO; + goto sched_tasklet; + } + + nfc_dev_dbg(&dev->interface->dev, "Received a valid ack"); + + rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC); + if (rc) { + nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with" + " result %d", rc); + dev->tklt_in_error = rc; + goto sched_tasklet; + } + + return; + +sched_tasklet: + dev->tklt_in_frame = NULL; + tasklet_schedule(&dev->tasklet); +} + +static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags) +{ + dev->in_urb->complete = pn533_recv_ack; + + return usb_submit_urb(dev->in_urb, flags); +} + +static int pn533_send_ack(struct pn533 *dev, gfp_t flags) +{ + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + pn533_tx_frame_ack(dev->out_frame); + + dev->out_urb->transfer_buffer = dev->out_frame; + dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE; + rc = usb_submit_urb(dev->out_urb, flags); + + return rc; +} + +static int __pn533_send_cmd_frame_async(struct pn533 *dev, + struct pn533_frame *out_frame, + struct pn533_frame *in_frame, + int in_frame_len, + pn533_cmd_complete_t cmd_complete, + void *arg, gfp_t flags) +{ + int rc; + + nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", + PN533_FRAME_CMD(out_frame)); + + dev->cmd = PN533_FRAME_CMD(out_frame); + dev->cmd_complete = cmd_complete; + dev->cmd_complete_arg = arg; + + dev->out_urb->transfer_buffer = out_frame; + dev->out_urb->transfer_buffer_length = + PN533_FRAME_SIZE(out_frame); + + dev->in_urb->transfer_buffer = in_frame; + dev->in_urb->transfer_buffer_length = in_frame_len; + + rc = usb_submit_urb(dev->out_urb, flags); + if (rc) + return rc; + + rc = pn533_submit_urb_for_ack(dev, flags); + if (rc) + goto error; + + return 0; + +error: + usb_unlink_urb(dev->out_urb); + return rc; +} + +static int pn533_send_cmd_frame_async(struct pn533 *dev, + struct pn533_frame *out_frame, + struct pn533_frame *in_frame, + int in_frame_len, + pn533_cmd_complete_t cmd_complete, + void *arg, gfp_t flags) +{ + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + if (down_trylock(&dev->cmd_lock)) + return -EBUSY; + + rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame, + in_frame_len, cmd_complete, arg, flags); + if (rc) + goto error; + + return 0; +error: + up(&dev->cmd_lock); + return rc; +} + +struct pn533_sync_cmd_response { + int rc; + struct completion done; +}; + +static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg, + u8 *params, int params_len) +{ + struct pn533_sync_cmd_response *arg = _arg; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + arg->rc = 0; + + if (params_len < 0) /* error */ + arg->rc = params_len; + + complete(&arg->done); + + return 0; +} + +static int pn533_send_cmd_frame_sync(struct pn533 *dev, + struct pn533_frame *out_frame, + struct pn533_frame *in_frame, + int in_frame_len) +{ + int rc; + struct pn533_sync_cmd_response arg; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + init_completion(&arg.done); + + rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len, + pn533_sync_cmd_complete, &arg, GFP_KERNEL); + if (rc) + return rc; + + wait_for_completion(&arg.done); + + return arg.rc; +} + +static void pn533_send_complete(struct urb *urb) +{ + struct pn533 *dev = urb->context; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + switch (urb->status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" + " status: %d", urb->status); + break; + default: + nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:" + " %d", urb->status); + } +} + +struct pn533_target_type_a { + __be16 sens_res; + u8 sel_res; + u8 nfcid_len; + u8 nfcid_data[]; +} __packed; + + +#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) +#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) +#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) + +#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 +#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C + +#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) +#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) + +#define PN533_TYPE_A_SEL_PROT_MIFARE 0 +#define PN533_TYPE_A_SEL_PROT_ISO14443 1 +#define PN533_TYPE_A_SEL_PROT_DEP 2 +#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 + +static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, + int target_data_len) +{ + u8 ssd; + u8 platconf; + + if (target_data_len < sizeof(struct pn533_target_type_a)) + return false; + + /* The lenght check of nfcid[] and ats[] are not being performed because + the values are not being used */ + + /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ + ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); + platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); + + if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && + platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || + (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && + platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) + return false; + + /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ + if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) + return false; + + return true; +} + +static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, + int tgt_data_len) +{ + struct pn533_target_type_a *tgt_type_a; + + tgt_type_a = (struct pn533_target_type_a *) tgt_data; + + if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len)) + return -EPROTO; + + switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { + case PN533_TYPE_A_SEL_PROT_MIFARE: + nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; + break; + case PN533_TYPE_A_SEL_PROT_ISO14443: + nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; + break; + case PN533_TYPE_A_SEL_PROT_DEP: + nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; + break; + case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: + nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | + NFC_PROTO_NFC_DEP_MASK; + break; + } + + nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); + nfc_tgt->sel_res = tgt_type_a->sel_res; + + return 0; +} + +struct pn533_target_felica { + u8 pol_res; + u8 opcode; + u8 nfcid2[8]; + u8 pad[8]; + /* optional */ + u8 syst_code[]; +} __packed; + +#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 +#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE + +static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, + int target_data_len) +{ + if (target_data_len < sizeof(struct pn533_target_felica)) + return false; + + if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) + return false; + + return true; +} + +static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, + int tgt_data_len) +{ + struct pn533_target_felica *tgt_felica; + + tgt_felica = (struct pn533_target_felica *) tgt_data; + + if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len)) + return -EPROTO; + + if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 && + tgt_felica->nfcid2[1] == + PN533_FELICA_SENSF_NFCID2_DEP_B2) + nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; + else + nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; + + 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); + + 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_MASK; + + return 0; +} + +struct pn533_poll_response { + u8 nbtg; + u8 tg; + u8 target_data[]; +} __packed; + +static int pn533_target_found(struct pn533 *dev, + struct pn533_poll_response *resp, int resp_len) +{ + int target_data_len; + struct nfc_target nfc_tgt; + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__, + dev->poll_mod_curr); + + if (resp->tg != 1) + return -EPROTO; + + target_data_len = resp_len - sizeof(struct pn533_poll_response); + + switch (dev->poll_mod_curr) { + case PN533_POLL_MOD_106KBPS_A: + rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data, + target_data_len); + break; + case PN533_POLL_MOD_212KBPS_FELICA: + case PN533_POLL_MOD_424KBPS_FELICA: + rc = pn533_target_found_felica(&nfc_tgt, resp->target_data, + target_data_len); + break; + case PN533_POLL_MOD_106KBPS_JEWEL: + rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data, + target_data_len); + break; + case PN533_POLL_MOD_847KBPS_B: + rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data, + target_data_len); + break; + default: + nfc_dev_err(&dev->interface->dev, "Unknown current poll" + " modulation"); + return -EPROTO; + } + + if (rc) + return rc; + + if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { + nfc_dev_dbg(&dev->interface->dev, "The target found does not" + " have the desired protocol"); + return -EAGAIN; + } + + nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: " + "0x%x", nfc_tgt.supported_protocols); + + dev->tgt_available_prots = nfc_tgt.supported_protocols; + + nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); + + return 0; +} + +static 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 protocols) +{ + pn533_poll_reset_mod_list(dev); + + if (protocols & NFC_PROTO_MIFARE_MASK + || protocols & NFC_PROTO_ISO14443_MASK + || protocols & NFC_PROTO_NFC_DEP_MASK) + pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A); + + if (protocols & NFC_PROTO_FELICA_MASK + || 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 (protocols & NFC_PROTO_JEWEL_MASK) + pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL); + + if (protocols & NFC_PROTO_ISO14443_MASK) + pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B); +} + +static void pn533_start_poll_frame(struct pn533_frame *frame, + struct pn533_poll_modulations *mod) +{ + + pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET); + + memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len); + frame->datalen += mod->len; + + pn533_tx_frame_finish(frame); +} + +static int pn533_start_poll_complete(struct pn533 *dev, void *arg, + u8 *params, int params_len) +{ + struct pn533_poll_response *resp; + struct pn533_poll_modulations *next_mod; + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + if (params_len == -ENOENT) { + nfc_dev_dbg(&dev->interface->dev, "Polling operation has been" + " stopped"); + goto stop_poll; + } + + if (params_len < 0) { + nfc_dev_err(&dev->interface->dev, "Error %d when running poll", + params_len); + goto stop_poll; + } + + resp = (struct pn533_poll_response *) params; + if (resp->nbtg) { + rc = pn533_target_found(dev, resp, params_len); + + /* We must stop the poll after a valid target found */ + if (rc == 0) + goto stop_poll; + + if (rc != -EAGAIN) + nfc_dev_err(&dev->interface->dev, "The target found is" + " not valid - continuing to poll"); + } + + dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; + + next_mod = dev->poll_mod_active[dev->poll_mod_curr]; + + nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)", + dev->poll_mod_curr); + + pn533_start_poll_frame(dev->out_frame, next_mod); + + /* Don't need to down the semaphore again */ + rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, + dev->in_maxlen, pn533_start_poll_complete, + NULL, GFP_ATOMIC); + + if (rc == -EPERM) { + nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation" + " because poll has been stopped"); + goto stop_poll; + } + + if (rc) { + nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll" + " next modulation", rc); + goto stop_poll; + } + + /* Inform caller function to do not up the semaphore */ + return -EINPROGRESS; + +stop_poll: + pn533_poll_reset_mod_list(dev); + dev->poll_protocols = 0; + return 0; +} + +static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols) +{ + struct pn533 *dev = nfc_get_drvdata(nfc_dev); + struct pn533_poll_modulations *start_mod; + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__, + protocols); + + if (dev->poll_mod_count) { + nfc_dev_err(&dev->interface->dev, "Polling operation already" + " active"); + return -EBUSY; + } + + if (dev->tgt_active_prot) { + nfc_dev_err(&dev->interface->dev, "Cannot poll with a target" + " already activated"); + return -EBUSY; + } + + pn533_poll_create_mod_list(dev, protocols); + + if (!dev->poll_mod_count) { + nfc_dev_err(&dev->interface->dev, "No valid protocols" + " specified"); + rc = -EINVAL; + goto error; + } + + nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types", + dev->poll_mod_count); + + dev->poll_mod_curr = 0; + start_mod = dev->poll_mod_active[dev->poll_mod_curr]; + + pn533_start_poll_frame(dev->out_frame, start_mod); + + rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, + dev->in_maxlen, pn533_start_poll_complete, + NULL, GFP_KERNEL); + + if (rc) { + nfc_dev_err(&dev->interface->dev, "Error %d when trying to" + " start poll", rc); + goto error; + } + + dev->poll_protocols = protocols; + + return 0; + +error: + pn533_poll_reset_mod_list(dev); + return rc; +} + +static void pn533_stop_poll(struct nfc_dev *nfc_dev) +{ + struct pn533 *dev = nfc_get_drvdata(nfc_dev); + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + if (!dev->poll_mod_count) { + nfc_dev_dbg(&dev->interface->dev, "Polling operation was not" + " running"); + return; + } + + /* An ack will cancel the last issued command (poll) */ + pn533_send_ack(dev, GFP_KERNEL); + + /* prevent pn533_start_poll_complete to issue a new poll meanwhile */ + usb_kill_urb(dev->in_urb); +} + +static int pn533_activate_target_nfcdep(struct pn533 *dev) +{ + struct pn533_cmd_activate_param param; + struct pn533_cmd_activate_response *resp; + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR); + + param.tg = 1; + param.next = 0; + memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), ¶m, + sizeof(struct pn533_cmd_activate_param)); + dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param); + + pn533_tx_frame_finish(dev->out_frame); + + rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, + dev->in_maxlen); + if (rc) + return rc; + + resp = (struct pn533_cmd_activate_response *) + PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame); + rc = resp->status & PN533_CMD_RET_MASK; + if (rc != PN533_CMD_RET_SUCCESS) + return -EIO; + + return 0; +} + +static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx, + u32 protocol) +{ + struct pn533 *dev = nfc_get_drvdata(nfc_dev); + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__, + protocol); + + if (dev->poll_mod_count) { + nfc_dev_err(&dev->interface->dev, "Cannot activate while" + " polling"); + return -EBUSY; + } + + if (dev->tgt_active_prot) { + nfc_dev_err(&dev->interface->dev, "There is already an active" + " target"); + return -EBUSY; + } + + if (!dev->tgt_available_prots) { + nfc_dev_err(&dev->interface->dev, "There is no available target" + " to activate"); + return -EINVAL; + } + + if (!(dev->tgt_available_prots & (1 << protocol))) { + nfc_dev_err(&dev->interface->dev, "The target does not support" + " the requested protocol %u", protocol); + return -EINVAL; + } + + if (protocol == NFC_PROTO_NFC_DEP) { + rc = pn533_activate_target_nfcdep(dev); + if (rc) { + nfc_dev_err(&dev->interface->dev, "Error %d when" + " activating target with" + " NFC_DEP protocol", rc); + return rc; + } + } + + dev->tgt_active_prot = protocol; + dev->tgt_available_prots = 0; + + return 0; +} + +static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx) +{ + struct pn533 *dev = nfc_get_drvdata(nfc_dev); + u8 tg; + u8 status; + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + if (!dev->tgt_active_prot) { + nfc_dev_err(&dev->interface->dev, "There is no active target"); + return; + } + + dev->tgt_active_prot = 0; + + pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE); + + tg = 1; + memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8)); + dev->out_frame->datalen += sizeof(u8); + + pn533_tx_frame_finish(dev->out_frame); + + rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, + dev->in_maxlen); + if (rc) { + nfc_dev_err(&dev->interface->dev, "Error when sending release" + " command to the controller"); + return; + } + + status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0]; + rc = status & PN533_CMD_RET_MASK; + if (rc != PN533_CMD_RET_SUCCESS) + nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing" + " the target", rc); + + return; +} + +#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3) +#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262 + +static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb) +{ + int payload_len = skb->len; + struct pn533_frame *out_frame; + struct sk_buff *discarded; + u8 tg; + + nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__, + payload_len); + + if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { + /* TODO: Implement support to multi-part data exchange */ + nfc_dev_err(&dev->interface->dev, "Data length greater than the" + " max allowed: %d", + PN533_CMD_DATAEXCH_DATA_MAXLEN); + return -ENOSYS; + } + + /* Reserving header space */ + if (skb_cow_head(skb, PN533_CMD_DATAEXCH_HEAD_LEN)) { + nfc_dev_err(&dev->interface->dev, "Error to add header data"); + return -ENOMEM; + } + + /* Reserving tail space, see pn533_tx_frame_finish */ + if (skb_cow_data(skb, PN533_FRAME_TAIL_SIZE, &discarded) < 0) { + nfc_dev_err(&dev->interface->dev, "Error to add tail data"); + return -ENOMEM; + } + + skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN); + out_frame = (struct pn533_frame *) skb->data; + + pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE); + + tg = 1; + memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8)); + out_frame->datalen += sizeof(u8); + + /* The data is already in the out_frame, just update the datalen */ + out_frame->datalen += payload_len; + + pn533_tx_frame_finish(out_frame); + skb_put(skb, PN533_FRAME_TAIL_SIZE); + + return 0; +} + +struct pn533_data_exchange_arg { + struct sk_buff *skb_resp; + struct sk_buff *skb_out; + data_exchange_cb_t cb; + void *cb_context; +}; + +static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, + u8 *params, int params_len) +{ + struct pn533_data_exchange_arg *arg = _arg; + struct sk_buff *skb_resp = arg->skb_resp; + struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data; + int err = 0; + u8 status; + u8 cmd_ret; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + dev_kfree_skb_irq(arg->skb_out); + + if (params_len < 0) { /* error */ + err = params_len; + goto error; + } + + skb_put(skb_resp, PN533_FRAME_SIZE(in_frame)); + + status = params[0]; + + cmd_ret = status & PN533_CMD_RET_MASK; + if (cmd_ret != PN533_CMD_RET_SUCCESS) { + nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when" + " exchanging data", cmd_ret); + err = -EIO; + goto error; + } + + if (status & PN533_CMD_MI_MASK) { + /* TODO: Implement support to multi-part data exchange */ + nfc_dev_err(&dev->interface->dev, "Multi-part message not yet" + " supported"); + /* Prevent the other messages from controller */ + pn533_send_ack(dev, GFP_ATOMIC); + err = -ENOSYS; + goto error; + } + + skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN); + skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE); + + arg->cb(arg->cb_context, skb_resp, 0); + kfree(arg); + return 0; + +error: + dev_kfree_skb_irq(skb_resp); + arg->cb(arg->cb_context, NULL, err); + kfree(arg); + return 0; +} + +int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx, + struct sk_buff *skb, + data_exchange_cb_t cb, + void *cb_context) +{ + struct pn533 *dev = nfc_get_drvdata(nfc_dev); + struct pn533_frame *out_frame, *in_frame; + struct pn533_data_exchange_arg *arg; + struct sk_buff *skb_resp; + int skb_resp_len; + int rc; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + if (!dev->tgt_active_prot) { + nfc_dev_err(&dev->interface->dev, "Cannot exchange data if" + " there is no active target"); + rc = -EINVAL; + goto error; + } + + rc = pn533_data_exchange_tx_frame(dev, skb); + if (rc) + goto error; + + skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN + + PN533_CMD_DATAEXCH_DATA_MAXLEN + + PN533_FRAME_TAIL_SIZE; + + skb_resp = nfc_alloc_skb(skb_resp_len, GFP_KERNEL); + if (!skb_resp) { + rc = -ENOMEM; + goto error; + } + + in_frame = (struct pn533_frame *) skb_resp->data; + out_frame = (struct pn533_frame *) skb->data; + + arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL); + if (!arg) { + rc = -ENOMEM; + goto free_skb_resp; + } + + arg->skb_resp = skb_resp; + arg->skb_out = skb; + arg->cb = cb; + arg->cb_context = cb_context; + + rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len, + pn533_data_exchange_complete, arg, + GFP_KERNEL); + if (rc) { + nfc_dev_err(&dev->interface->dev, "Error %d when trying to" + " perform data_exchange", rc); + goto free_arg; + } + + return 0; + +free_arg: + kfree(arg); +free_skb_resp: + kfree_skb(skb_resp); +error: + kfree_skb(skb); + return rc; +} + +static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, + u8 cfgdata_len) +{ + int rc; + u8 *params; + + nfc_dev_dbg(&dev->interface->dev, "%s", __func__); + + pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION); + + params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame); + params[0] = cfgitem; + memcpy(¶ms[1], cfgdata, cfgdata_len); + dev->out_frame->datalen += (1 + cfgdata_len); + + pn533_tx_frame_finish(dev->out_frame); + + rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, + dev->in_maxlen); + + return rc; +} + +struct nfc_ops pn533_nfc_ops = { + .start_poll = pn533_start_poll, + .stop_poll = pn533_stop_poll, + .activate_target = pn533_activate_target, + .deactivate_target = pn533_deactivate_target, + .data_exchange = pn533_data_exchange, +}; + +static int pn533_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct pn533_fw_version *fw_ver; + struct pn533 *dev; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + struct pn533_config_max_retries max_retries; + int in_endpoint = 0; + int out_endpoint = 0; + int rc = -ENOMEM; + int i; + u32 protocols; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + dev->udev = usb_get_dev(interface_to_usbdev(interface)); + dev->interface = interface; + sema_init(&dev->cmd_lock, 1); + + iface_desc = interface->cur_altsetting; + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) { + dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize); + in_endpoint = endpoint->bEndpointAddress; + } + + if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) { + dev->out_maxlen = + le16_to_cpu(endpoint->wMaxPacketSize); + out_endpoint = endpoint->bEndpointAddress; + } + } + + if (!in_endpoint || !out_endpoint) { + nfc_dev_err(&interface->dev, "Could not find bulk-in or" + " bulk-out endpoint"); + rc = -ENODEV; + goto error; + } + + dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL); + dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); + dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL); + dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); + + if (!dev->in_frame || !dev->out_frame || + !dev->in_urb || !dev->out_urb) + goto error; + + usb_fill_bulk_urb(dev->in_urb, dev->udev, + usb_rcvbulkpipe(dev->udev, in_endpoint), + NULL, 0, NULL, dev); + usb_fill_bulk_urb(dev->out_urb, dev->udev, + usb_sndbulkpipe(dev->udev, out_endpoint), + NULL, 0, + pn533_send_complete, dev); + + tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev); + + usb_set_intfdata(interface, dev); + + pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION); + pn533_tx_frame_finish(dev->out_frame); + + rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, + dev->in_maxlen); + if (rc) + goto kill_tasklet; + + fw_ver = (struct pn533_fw_version *) + PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame); + nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now" + " attached", fw_ver->ver, fw_ver->rev); + + protocols = NFC_PROTO_JEWEL_MASK + | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK + | NFC_PROTO_ISO14443_MASK + | NFC_PROTO_NFC_DEP_MASK; + + dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols); + if (!dev->nfc_dev) + goto kill_tasklet; + + nfc_set_parent_dev(dev->nfc_dev, &interface->dev); + nfc_set_drvdata(dev->nfc_dev, dev); + + rc = nfc_register_device(dev->nfc_dev); + if (rc) + goto free_nfc_dev; + + max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS; + max_retries.mx_rty_psl = 2; + max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY; + + rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, + (u8 *) &max_retries, sizeof(max_retries)); + + if (rc) { + nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES" + " config"); + goto free_nfc_dev; + } + + return 0; + +free_nfc_dev: + nfc_free_device(dev->nfc_dev); +kill_tasklet: + tasklet_kill(&dev->tasklet); +error: + kfree(dev->in_frame); + usb_free_urb(dev->in_urb); + kfree(dev->out_frame); + usb_free_urb(dev->out_urb); + kfree(dev); + return rc; +} + +static void pn533_disconnect(struct usb_interface *interface) +{ + struct pn533 *dev; + + dev = usb_get_intfdata(interface); + usb_set_intfdata(interface, NULL); + + nfc_unregister_device(dev->nfc_dev); + nfc_free_device(dev->nfc_dev); + + usb_kill_urb(dev->in_urb); + usb_kill_urb(dev->out_urb); + + tasklet_kill(&dev->tasklet); + + kfree(dev->in_frame); + usb_free_urb(dev->in_urb); + kfree(dev->out_frame); + usb_free_urb(dev->out_urb); + kfree(dev); + + nfc_dev_info(&dev->interface->dev, "NXP PN533 NFC device disconnected"); +} + +static struct usb_driver pn533_driver = { + .name = "pn533", + .probe = pn533_probe, + .disconnect = pn533_disconnect, + .id_table = pn533_table, +}; + +static int __init pn533_init(void) +{ + int rc; + + rc = usb_register(&pn533_driver); + if (rc) + err("usb_register failed. Error number %d", rc); + + return rc; +} + +static void __exit pn533_exit(void) +{ + usb_deregister(&pn533_driver); +} + +module_init(pn533_init); +module_exit(pn533_exit); + +MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>," + " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); +MODULE_DESCRIPTION("PN533 usb driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL"); |