From 3e256b8f8dfa309a80b5dece388d85d9a9801a29 Mon Sep 17 00:00:00 2001 From: Lauro Ramos Venancio Date: Fri, 1 Jul 2011 19:31:33 -0300 Subject: NFC: add nfc subsystem core The NFC subsystem core is responsible for providing the device driver interface. It is also responsible for providing an interface to the control operations and data exchange. Signed-off-by: Lauro Ramos Venancio Signed-off-by: Aloisio Almeida Jr Signed-off-by: Samuel Ortiz Signed-off-by: John W. Linville --- drivers/nfc/Kconfig | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) (limited to 'drivers/nfc/Kconfig') diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig index ea1580085347..780928918fc3 100644 --- a/drivers/nfc/Kconfig +++ b/drivers/nfc/Kconfig @@ -2,17 +2,8 @@ # Near Field Communication (NFC) devices # -menuconfig NFC_DEVICES - bool "Near Field Communication (NFC) devices" - default n - ---help--- - You'll have to say Y if your computer contains an NFC device that - you want to use under Linux. - - You can say N here if you don't have any Near Field Communication - devices connected to your computer. - -if NFC_DEVICES +menu "Near Field Communication (NFC) devices" + depends on NFC config PN544_NFC tristate "PN544 NFC driver" @@ -26,5 +17,4 @@ config PN544_NFC To compile this driver as a module, choose m here. The module will be called pn544. - -endif # NFC_DEVICES +endmenu -- cgit v1.2.3 From c46ee38620a2aa2b25b16bc9738ace80dbff76a4 Mon Sep 17 00:00:00 2001 From: Aloisio Almeida Jr Date: Fri, 1 Jul 2011 19:31:37 -0300 Subject: NFC: pn533: add NXP pn533 nfc device driver Signed-off-by: Lauro Ramos Venancio Signed-off-by: Aloisio Almeida Jr Signed-off-by: Samuel Ortiz Signed-off-by: John W. Linville --- drivers/nfc/Kconfig | 10 + drivers/nfc/Makefile | 1 + drivers/nfc/pn533.c | 1632 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1643 insertions(+) create mode 100644 drivers/nfc/pn533.c (limited to 'drivers/nfc/Kconfig') 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 + * Aloisio Almeida Jr + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#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 ," + " Aloisio Almeida Jr "); +MODULE_DESCRIPTION("PN533 usb driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL"); -- cgit v1.2.3