Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-29 06:12:08 +00:00
Code Issues Packages Projects Releases Wiki Activity
79226cea4a
linux/drivers/nfc/pn544/pn544.c
Thomas Gleixner 46fe777164 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 399 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation 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 see http www gnu org
  licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 33 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531081038.745679586@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:12 +02:00

985 lines
24 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* HCI based Driver for NXP PN544 NFC Chip
*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/nfc.h>
#include <net/nfc/hci.h>
#include <net/nfc/llc.h>
#include "pn544.h"
/* Timing restrictions (ms) */
#define PN544_HCI_RESETVEN_TIME 30
enum pn544_state {
PN544_ST_COLD,
PN544_ST_FW_READY,
PN544_ST_READY,
};
#define FULL_VERSION_LEN 11
/* Proprietary commands */
#define PN544_WRITE 0x3f
#define PN544_TEST_SWP 0x21
/* Proprietary gates, events, commands and registers */
/* NFC_HCI_RF_READER_A_GATE additional registers and commands */
#define PN544_RF_READER_A_AUTO_ACTIVATION 0x10
#define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION 0x12
#define PN544_MIFARE_CMD 0x21
/* Commands that apply to all RF readers */
#define PN544_RF_READER_CMD_PRESENCE_CHECK 0x30
#define PN544_RF_READER_CMD_ACTIVATE_NEXT 0x32
/* NFC_HCI_ID_MGMT_GATE additional registers */
#define PN544_ID_MGMT_FULL_VERSION_SW 0x10
#define PN544_RF_READER_ISO15693_GATE 0x12
#define PN544_RF_READER_F_GATE 0x14
#define PN544_FELICA_ID 0x04
#define PN544_FELICA_RAW 0x20
#define PN544_RF_READER_JEWEL_GATE 0x15
#define PN544_JEWEL_RAW_CMD 0x23
#define PN544_RF_READER_NFCIP1_INITIATOR_GATE 0x30
#define PN544_RF_READER_NFCIP1_TARGET_GATE 0x31
#define PN544_SYS_MGMT_GATE 0x90
#define PN544_SYS_MGMT_INFO_NOTIFICATION 0x02
#define PN544_POLLING_LOOP_MGMT_GATE 0x94
#define PN544_DEP_MODE 0x01
#define PN544_DEP_ATR_REQ 0x02
#define PN544_DEP_ATR_RES 0x03
#define PN544_DEP_MERGE 0x0D
#define PN544_PL_RDPHASES 0x06
#define PN544_PL_EMULATION 0x07
#define PN544_PL_NFCT_DEACTIVATED 0x09
#define PN544_SWP_MGMT_GATE 0xA0
#define PN544_SWP_DEFAULT_MODE 0x01
#define PN544_NFC_WI_MGMT_GATE 0xA1
#define PN544_NFC_ESE_DEFAULT_MODE 0x01
#define PN544_HCI_EVT_SND_DATA 0x01
#define PN544_HCI_EVT_ACTIVATED 0x02
#define PN544_HCI_EVT_DEACTIVATED 0x03
#define PN544_HCI_EVT_RCV_DATA 0x04
#define PN544_HCI_EVT_CONTINUE_MI 0x05
#define PN544_HCI_EVT_SWITCH_MODE 0x03
#define PN544_HCI_CMD_ATTREQUEST 0x12
#define PN544_HCI_CMD_CONTINUE_ACTIVATION 0x13
static struct nfc_hci_gate pn544_gates[] = {
{NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE},
{NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE},
{NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE},
{NFC_HCI_LINK_MGMT_GATE, NFC_HCI_INVALID_PIPE},
{NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE},
{NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE},
{PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE},
{PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
{PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
{PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE},
{PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE},
{PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE},
{PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE},
{PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE},
{PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE}
};
/* Largest headroom needed for outgoing custom commands */
#define PN544_CMDS_HEADROOM 2
struct pn544_hci_info {
struct nfc_phy_ops *phy_ops;
void *phy_id;
struct nfc_hci_dev *hdev;
enum pn544_state state;
struct mutex info_lock;
int async_cb_type;
data_exchange_cb_t async_cb;
void *async_cb_context;
fw_download_t fw_download;
};
static int pn544_hci_open(struct nfc_hci_dev *hdev)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
int r = 0;
mutex_lock(&info->info_lock);
if (info->state != PN544_ST_COLD) {
r = -EBUSY;
goto out;
}
r = info->phy_ops->enable(info->phy_id);
if (r == 0)
info->state = PN544_ST_READY;
out:
mutex_unlock(&info->info_lock);
return r;
}
static void pn544_hci_close(struct nfc_hci_dev *hdev)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
mutex_lock(&info->info_lock);
if (info->state == PN544_ST_COLD)
goto out;
info->phy_ops->disable(info->phy_id);
info->state = PN544_ST_COLD;
out:
mutex_unlock(&info->info_lock);
}
static int pn544_hci_ready(struct nfc_hci_dev *hdev)
{
struct sk_buff *skb;
static struct hw_config {
u8 adr[2];
u8 value;
} hw_config[] = {
{{0x9f, 0x9a}, 0x00},
{{0x98, 0x10}, 0xbc},
{{0x9e, 0x71}, 0x00},
{{0x98, 0x09}, 0x00},
{{0x9e, 0xb4}, 0x00},
{{0x9c, 0x01}, 0x08},
{{0x9e, 0xaa}, 0x01},
{{0x9b, 0xd1}, 0x17},
{{0x9b, 0xd2}, 0x58},
{{0x9b, 0xd3}, 0x10},
{{0x9b, 0xd4}, 0x47},
{{0x9b, 0xd5}, 0x0c},
{{0x9b, 0xd6}, 0x37},
{{0x9b, 0xdd}, 0x33},
{{0x9b, 0x84}, 0x00},
{{0x99, 0x81}, 0x79},
{{0x99, 0x31}, 0x79},
{{0x98, 0x00}, 0x3f},
{{0x9f, 0x09}, 0x02},
{{0x9f, 0x0a}, 0x05},
{{0x9e, 0xd1}, 0xa1},
{{0x99, 0x23}, 0x01},
{{0x9e, 0x74}, 0x00},
{{0x9e, 0x90}, 0x00},
{{0x9f, 0x28}, 0x10},
{{0x9f, 0x35}, 0x04},
{{0x9f, 0x36}, 0x11},
{{0x9c, 0x31}, 0x00},
{{0x9c, 0x32}, 0x00},
{{0x9c, 0x19}, 0x0a},
{{0x9c, 0x1a}, 0x0a},
{{0x9c, 0x0c}, 0x00},
{{0x9c, 0x0d}, 0x00},
{{0x9c, 0x12}, 0x00},
{{0x9c, 0x13}, 0x00},
{{0x98, 0xa2}, 0x09},
{{0x98, 0x93}, 0x00},
{{0x98, 0x7d}, 0x08},
{{0x98, 0x7e}, 0x00},
{{0x9f, 0xc8}, 0x00},
};
struct hw_config *p = hw_config;
int count = ARRAY_SIZE(hw_config);
struct sk_buff *res_skb;
u8 param[4];
int r;
param[0] = 0;
while (count--) {
param[1] = p->adr[0];
param[2] = p->adr[1];
param[3] = p->value;
r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE,
param, 4, &res_skb);
if (r < 0)
return r;
if (res_skb->len != 1) {
kfree_skb(res_skb);
return -EPROTO;
}
if (res_skb->data[0] != p->value) {
kfree_skb(res_skb);
return -EIO;
}
kfree_skb(res_skb);
p++;
}
param[0] = NFC_HCI_UICC_HOST_ID;
r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
NFC_HCI_ADMIN_WHITELIST, param, 1);
if (r < 0)
return r;
param[0] = 0x3d;
r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE,
PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1);
if (r < 0)
return r;
param[0] = 0x0;
r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE,
PN544_RF_READER_A_AUTO_ACTIVATION, param, 1);
if (r < 0)
return r;
r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
if (r < 0)
return r;
param[0] = 0x1;
r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
PN544_PL_NFCT_DEACTIVATED, param, 1);
if (r < 0)
return r;
param[0] = 0x0;
r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
PN544_PL_RDPHASES, param, 1);
if (r < 0)
return r;
r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
PN544_ID_MGMT_FULL_VERSION_SW, &skb);
if (r < 0)
return r;
if (skb->len != FULL_VERSION_LEN) {
kfree_skb(skb);
return -EINVAL;
}
print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ",
DUMP_PREFIX_NONE, 16, 1,
skb->data, FULL_VERSION_LEN, false);
kfree_skb(skb);
return 0;
}
static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
return info->phy_ops->write(info->phy_id, skb);
}
static int pn544_hci_start_poll(struct nfc_hci_dev *hdev,
u32 im_protocols, u32 tm_protocols)
{
u8 phases = 0;
int r;
u8 duration[2];
u8 activated;
u8 i_mode = 0x3f; /* Enable all supported modes */
u8 t_mode = 0x0f;
u8 t_merge = 0x01; /* Enable merge by default */
pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n",
__func__, im_protocols, tm_protocols);
r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
if (r < 0)
return r;
duration[0] = 0x18;
duration[1] = 0x6a;
r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
PN544_PL_EMULATION, duration, 2);
if (r < 0)
return r;
activated = 0;
r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
PN544_PL_NFCT_DEACTIVATED, &activated, 1);
if (r < 0)
return r;
if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK |
NFC_PROTO_JEWEL_MASK))
phases |= 1; /* Type A */
if (im_protocols & NFC_PROTO_FELICA_MASK) {
phases |= (1 << 2); /* Type F 212 */
phases |= (1 << 3); /* Type F 424 */
}
phases |= (1 << 5); /* NFC active */
r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
PN544_PL_RDPHASES, &phases, 1);
if (r < 0)
return r;
if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
&hdev->gb_len);
pr_debug("generate local bytes %p\n", hdev->gb);
if (hdev->gb == NULL || hdev->gb_len == 0) {
im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
}
}
if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
r = nfc_hci_send_event(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
if (r < 0)
return r;
r = nfc_hci_set_param(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
PN544_DEP_MODE, &i_mode, 1);
if (r < 0)
return r;
r = nfc_hci_set_param(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len);
if (r < 0)
return r;
r = nfc_hci_send_event(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
if (r < 0)
nfc_hci_send_event(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
}
if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
PN544_DEP_MODE, &t_mode, 1);
if (r < 0)
return r;
r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len);
if (r < 0)
return r;
r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
PN544_DEP_MERGE, &t_merge, 1);
if (r < 0)
return r;
}
r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
if (r < 0)
nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
return r;
}
static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev,
struct nfc_target *target, u8 comm_mode,
u8 *gb, size_t gb_len)
{
struct sk_buff *rgb_skb = NULL;
int r;
r = nfc_hci_get_param(hdev, target->hci_reader_gate,
PN544_DEP_ATR_RES, &rgb_skb);
if (r < 0)
return r;
if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
r = -EPROTO;
goto exit;
}
print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET,
16, 1, rgb_skb->data, rgb_skb->len, true);
r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
rgb_skb->len);
if (r == 0)
r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
NFC_RF_INITIATOR);
exit:
kfree_skb(rgb_skb);
return r;
}
static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev)
{
return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
}
static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
struct nfc_target *target)
{
switch (gate) {
case PN544_RF_READER_F_GATE:
target->supported_protocols = NFC_PROTO_FELICA_MASK;
break;
case PN544_RF_READER_JEWEL_GATE:
target->supported_protocols = NFC_PROTO_JEWEL_MASK;
target->sens_res = 0x0c00;
break;
case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
break;
default:
return -EPROTO;
}
return 0;
}
static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
u8 gate,
struct nfc_target *target)
{
struct sk_buff *uid_skb;
int r = 0;
if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
return r;
if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
r = nfc_hci_send_cmd(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL);
if (r < 0)
return r;
target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
} else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
target->nfcid1_len != 10)
return -EPROTO;
r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
PN544_RF_READER_CMD_ACTIVATE_NEXT,
target->nfcid1, target->nfcid1_len, NULL);
} else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE,
PN544_FELICA_ID, &uid_skb);
if (r < 0)
return r;
if (uid_skb->len != 8) {
kfree_skb(uid_skb);
return -EPROTO;
}
/* Type F NFC-DEP IDm has prefix 0x01FE */
if ((uid_skb->data[0] == 0x01) && (uid_skb->data[1] == 0xfe)) {
kfree_skb(uid_skb);
r = nfc_hci_send_cmd(hdev,
PN544_RF_READER_NFCIP1_INITIATOR_GATE,
PN544_HCI_CMD_CONTINUE_ACTIVATION,
NULL, 0, NULL);
if (r < 0)
return r;
target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
target->hci_reader_gate =
PN544_RF_READER_NFCIP1_INITIATOR_GATE;
} else {
r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
PN544_RF_READER_CMD_ACTIVATE_NEXT,
uid_skb->data, uid_skb->len, NULL);
kfree_skb(uid_skb);
}
} else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) {
/*
* TODO: maybe other ISO 14443 require some kind of continue
* activation, but for now we've seen only this one below.
*/
if (target->sens_res == 0x4403) /* Type 4 Mifare DESFire */
r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION,
NULL, 0, NULL);
}
return r;
}
#define PN544_CB_TYPE_READER_F 1
static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb,
int err)
{
struct pn544_hci_info *info = context;
switch (info->async_cb_type) {
case PN544_CB_TYPE_READER_F:
if (err == 0)
skb_pull(skb, 1);
info->async_cb(info->async_cb_context, skb, err);
break;
default:
if (err == 0)
kfree_skb(skb);
break;
}
}
#define MIFARE_CMD_AUTH_KEY_A 0x60
#define MIFARE_CMD_AUTH_KEY_B 0x61
#define MIFARE_CMD_HEADER 2
#define MIFARE_UID_LEN 4
#define MIFARE_KEY_LEN 6
#define MIFARE_CMD_LEN 12
/*
* Returns:
* <= 0: driver handled the data exchange
* 1: driver doesn't especially handle, please do standard processing
*/
static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev,
struct nfc_target *target,
struct sk_buff *skb, data_exchange_cb_t cb,
void *cb_context)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__,
target->hci_reader_gate);
switch (target->hci_reader_gate) {
case NFC_HCI_RF_READER_A_GATE:
if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
/*
* It seems that pn544 is inverting key and UID for
* MIFARE authentication commands.
*/
if (skb->len == MIFARE_CMD_LEN &&
(skb->data[0] == MIFARE_CMD_AUTH_KEY_A ||
skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) {
u8 uid[MIFARE_UID_LEN];
u8 *data = skb->data + MIFARE_CMD_HEADER;
memcpy(uid, data + MIFARE_KEY_LEN,
MIFARE_UID_LEN);
memmove(data + MIFARE_UID_LEN, data,
MIFARE_KEY_LEN);
memcpy(data, uid, MIFARE_UID_LEN);
}
return nfc_hci_send_cmd_async(hdev,
target->hci_reader_gate,
PN544_MIFARE_CMD,
skb->data, skb->len,
cb, cb_context);
} else
return 1;
case PN544_RF_READER_F_GATE:
*(u8 *)skb_push(skb, 1) = 0;
*(u8 *)skb_push(skb, 1) = 0;
info->async_cb_type = PN544_CB_TYPE_READER_F;
info->async_cb = cb;
info->async_cb_context = cb_context;
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
PN544_FELICA_RAW, skb->data,
skb->len,
pn544_hci_data_exchange_cb, info);
case PN544_RF_READER_JEWEL_GATE:
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
PN544_JEWEL_RAW_CMD, skb->data,
skb->len, cb, cb_context);
case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
*(u8 *)skb_push(skb, 1) = 0;
return nfc_hci_send_event(hdev, target->hci_reader_gate,
PN544_HCI_EVT_SND_DATA, skb->data,
skb->len);
default:
return 1;
}
}
static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
int r;
/* Set default false for multiple information chaining */
*(u8 *)skb_push(skb, 1) = 0;
r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
kfree_skb(skb);
return r;
}
static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
struct nfc_target *target)
{
pr_debug("supported protocol %d\b", target->supported_protocols);
if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK |
NFC_PROTO_ISO14443_B_MASK)) {
return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
PN544_RF_READER_CMD_PRESENCE_CHECK,
NULL, 0, NULL);
} else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
target->nfcid1_len != 10)
return -EOPNOTSUPP;
return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
PN544_RF_READER_CMD_ACTIVATE_NEXT,
target->nfcid1, target->nfcid1_len, NULL);
} else if (target->supported_protocols & (NFC_PROTO_JEWEL_MASK |
NFC_PROTO_FELICA_MASK)) {
return -EOPNOTSUPP;
} else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
PN544_HCI_CMD_ATTREQUEST,
NULL, 0, NULL);
}
return 0;
}
/*
* Returns:
* <= 0: driver handled the event, skb consumed
* 1: driver does not handle the event, please do standard processing
*/
static int pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
struct sk_buff *skb)
{
struct sk_buff *rgb_skb = NULL;
u8 gate = hdev->pipes[pipe].gate;
int r;
pr_debug("hci event %d\n", event);
switch (event) {
case PN544_HCI_EVT_ACTIVATED:
if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) {
r = nfc_hci_target_discovered(hdev, gate);
} else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) {
r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ,
&rgb_skb);
if (r < 0)
goto exit;
r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
NFC_COMM_PASSIVE, rgb_skb->data,
rgb_skb->len);
kfree_skb(rgb_skb);
} else {
r = -EINVAL;
}
break;
case PN544_HCI_EVT_DEACTIVATED:
r = nfc_hci_send_event(hdev, gate, NFC_HCI_EVT_END_OPERATION,
NULL, 0);
break;
case PN544_HCI_EVT_RCV_DATA:
if (skb->len < 2) {
r = -EPROTO;
goto exit;
}
if (skb->data[0] != 0) {
pr_debug("data0 %d\n", skb->data[0]);
r = -EPROTO;
goto exit;
}
skb_pull(skb, 2);
return nfc_tm_data_received(hdev->ndev, skb);
default:
return 1;
}
exit:
kfree_skb(skb);
return r;
}
static int pn544_hci_fw_download(struct nfc_hci_dev *hdev,
const char *firmware_name)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
if (info->fw_download == NULL)
return -ENOTSUPP;
return info->fw_download(info->phy_id, firmware_name, hdev->sw_romlib);
}
static int pn544_hci_discover_se(struct nfc_hci_dev *hdev)
{
u32 se_idx = 0;
u8 ese_mode = 0x01; /* Default mode */
struct sk_buff *res_skb;
int r;
r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_TEST_SWP,
NULL, 0, &res_skb);
if (r == 0) {
if (res_skb->len == 2 && res_skb->data[0] == 0x00)
nfc_add_se(hdev->ndev, se_idx++, NFC_SE_UICC);
kfree_skb(res_skb);
}
r = nfc_hci_send_event(hdev, PN544_NFC_WI_MGMT_GATE,
PN544_HCI_EVT_SWITCH_MODE,
&ese_mode, 1);
if (r == 0)
nfc_add_se(hdev->ndev, se_idx++, NFC_SE_EMBEDDED);
return !se_idx;
}
#define PN544_SE_MODE_OFF 0x00
#define PN544_SE_MODE_ON 0x01
static int pn544_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx)
{
struct nfc_se *se;
u8 enable = PN544_SE_MODE_ON;
static struct uicc_gatelist {
u8 head;
u8 adr[2];
u8 value;
} uicc_gatelist[] = {
{0x00, {0x9e, 0xd9}, 0x23},
{0x00, {0x9e, 0xda}, 0x21},
{0x00, {0x9e, 0xdb}, 0x22},
{0x00, {0x9e, 0xdc}, 0x24},
};
struct uicc_gatelist *p = uicc_gatelist;
int count = ARRAY_SIZE(uicc_gatelist);
struct sk_buff *res_skb;
int r;
se = nfc_find_se(hdev->ndev, se_idx);
switch (se->type) {
case NFC_SE_UICC:
while (count--) {
r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE,
PN544_WRITE, (u8 *)p, 4, &res_skb);
if (r < 0)
return r;
if (res_skb->len != 1) {
kfree_skb(res_skb);
return -EPROTO;
}
if (res_skb->data[0] != p->value) {
kfree_skb(res_skb);
return -EIO;
}
kfree_skb(res_skb);
p++;
}
return nfc_hci_set_param(hdev, PN544_SWP_MGMT_GATE,
PN544_SWP_DEFAULT_MODE, &enable, 1);
case NFC_SE_EMBEDDED:
return nfc_hci_set_param(hdev, PN544_NFC_WI_MGMT_GATE,
PN544_NFC_ESE_DEFAULT_MODE, &enable, 1);
default:
return -EINVAL;
}
}
static int pn544_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx)
{
struct nfc_se *se;
u8 disable = PN544_SE_MODE_OFF;
se = nfc_find_se(hdev->ndev, se_idx);
switch (se->type) {
case NFC_SE_UICC:
return nfc_hci_set_param(hdev, PN544_SWP_MGMT_GATE,
PN544_SWP_DEFAULT_MODE, &disable, 1);
case NFC_SE_EMBEDDED:
return nfc_hci_set_param(hdev, PN544_NFC_WI_MGMT_GATE,
PN544_NFC_ESE_DEFAULT_MODE, &disable, 1);
default:
return -EINVAL;
}
}
static struct nfc_hci_ops pn544_hci_ops = {
.open = pn544_hci_open,
.close = pn544_hci_close,
.hci_ready = pn544_hci_ready,
.xmit = pn544_hci_xmit,
.start_poll = pn544_hci_start_poll,
.dep_link_up = pn544_hci_dep_link_up,
.dep_link_down = pn544_hci_dep_link_down,
.target_from_gate = pn544_hci_target_from_gate,
.complete_target_discovered = pn544_hci_complete_target_discovered,
.im_transceive = pn544_hci_im_transceive,
.tm_send = pn544_hci_tm_send,
.check_presence = pn544_hci_check_presence,
.event_received = pn544_hci_event_received,
.fw_download = pn544_hci_fw_download,
.discover_se = pn544_hci_discover_se,
.enable_se = pn544_hci_enable_se,
.disable_se = pn544_hci_disable_se,
};
int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
int phy_headroom, int phy_tailroom, int phy_payload,
fw_download_t fw_download, struct nfc_hci_dev **hdev)
{
struct pn544_hci_info *info;
u32 protocols;
struct nfc_hci_init_data init_data;
int r;
info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL);
if (!info) {
r = -ENOMEM;
goto err_info_alloc;
}
info->phy_ops = phy_ops;
info->phy_id = phy_id;
info->fw_download = fw_download;
info->state = PN544_ST_COLD;
mutex_init(&info->info_lock);
init_data.gate_count = ARRAY_SIZE(pn544_gates);
memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates));
/*
* TODO: Session id must include the driver name + some bus addr
* persistent info to discriminate 2 identical chips
*/
strcpy(init_data.session_id, "ID544HCI");
protocols = NFC_PROTO_JEWEL_MASK |
NFC_PROTO_MIFARE_MASK |
NFC_PROTO_FELICA_MASK |
NFC_PROTO_ISO14443_MASK |
NFC_PROTO_ISO14443_B_MASK |
NFC_PROTO_NFC_DEP_MASK;
info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data, 0,
protocols, llc_name,
phy_headroom + PN544_CMDS_HEADROOM,
phy_tailroom, phy_payload);
if (!info->hdev) {
pr_err("Cannot allocate nfc hdev\n");
r = -ENOMEM;
goto err_alloc_hdev;
}
nfc_hci_set_clientdata(info->hdev, info);
r = nfc_hci_register_device(info->hdev);
if (r)
goto err_regdev;
*hdev = info->hdev;
return 0;
err_regdev:
nfc_hci_free_device(info->hdev);
err_alloc_hdev:
kfree(info);
err_info_alloc:
return r;
}
EXPORT_SYMBOL(pn544_hci_probe);
void pn544_hci_remove(struct nfc_hci_dev *hdev)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
nfc_hci_unregister_device(hdev);
nfc_hci_free_device(hdev);
kfree(info);
}
EXPORT_SYMBOL(pn544_hci_remove);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(DRIVER_DESC);
Reference in New Issue View Git Blame Copy Permalink