mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Samuel Ortiz](/assets/img/avatar_default.png)
Some devices (e.g. Sony's PaSoRi) can not do type B polling, so we have to make a distinction between ISO14443 type A and B poll modes. Cc: Eric Lapuyade <eric.lapuyade@intel.com> Cc: Ilan Elias <ilane@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
960 lines
23 KiB
C
960 lines
23 KiB
C
/*
|
|
* HCI based Driver for NXP PN544 NFC Chip
|
|
*
|
|
* Copyright (C) 2012 Intel Corporation. All rights reserved.
|
|
*
|
|
* 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, write to the
|
|
* Free Software Foundation, Inc.,
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <linux/crc-ccitt.h>
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/i2c.h>
|
|
|
|
#include <linux/nfc.h>
|
|
#include <net/nfc/hci.h>
|
|
#include <net/nfc/shdlc.h>
|
|
|
|
#include <linux/nfc/pn544.h>
|
|
|
|
#define DRIVER_DESC "HCI NFC driver for PN544"
|
|
|
|
#define PN544_HCI_DRIVER_NAME "pn544_hci"
|
|
|
|
/* Timing restrictions (ms) */
|
|
#define PN544_HCI_RESETVEN_TIME 30
|
|
|
|
static struct i2c_device_id pn544_hci_id_table[] = {
|
|
{"pn544", 0},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, pn544_hci_id_table);
|
|
|
|
#define HCI_MODE 0
|
|
#define FW_MODE 1
|
|
|
|
/* framing in HCI mode */
|
|
#define PN544_HCI_LLC_LEN 1
|
|
#define PN544_HCI_LLC_CRC 2
|
|
#define PN544_HCI_LLC_LEN_CRC (PN544_HCI_LLC_LEN + PN544_HCI_LLC_CRC)
|
|
#define PN544_HCI_LLC_MIN_SIZE (1 + PN544_HCI_LLC_LEN_CRC)
|
|
#define PN544_HCI_LLC_MAX_PAYLOAD 29
|
|
#define PN544_HCI_LLC_MAX_SIZE (PN544_HCI_LLC_LEN_CRC + 1 + \
|
|
PN544_HCI_LLC_MAX_PAYLOAD)
|
|
|
|
enum pn544_state {
|
|
PN544_ST_COLD,
|
|
PN544_ST_FW_READY,
|
|
PN544_ST_READY,
|
|
};
|
|
|
|
#define FULL_VERSION_LEN 11
|
|
|
|
/* Proprietary commands */
|
|
#define PN544_WRITE 0x3f
|
|
|
|
/* 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_PL_RDPHASES 0x06
|
|
#define PN544_PL_EMULATION 0x07
|
|
#define PN544_PL_NFCT_DEACTIVATED 0x09
|
|
|
|
#define PN544_SWP_MGMT_GATE 0xA0
|
|
|
|
#define PN544_NFC_WI_MGMT_GATE 0xA1
|
|
|
|
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 i2c_client *i2c_dev;
|
|
struct nfc_shdlc *shdlc;
|
|
|
|
enum pn544_state state;
|
|
|
|
struct mutex info_lock;
|
|
|
|
unsigned int gpio_en;
|
|
unsigned int gpio_irq;
|
|
unsigned int gpio_fw;
|
|
unsigned int en_polarity;
|
|
|
|
int hard_fault; /*
|
|
* < 0 if hardware error occured (e.g. i2c err)
|
|
* and prevents normal operation.
|
|
*/
|
|
};
|
|
|
|
static void pn544_hci_platform_init(struct pn544_hci_info *info)
|
|
{
|
|
int polarity, retry, ret;
|
|
char rset_cmd[] = { 0x05, 0xF9, 0x04, 0x00, 0xC3, 0xE5 };
|
|
int count = sizeof(rset_cmd);
|
|
|
|
pr_info(DRIVER_DESC ": %s\n", __func__);
|
|
dev_info(&info->i2c_dev->dev, "Detecting nfc_en polarity\n");
|
|
|
|
/* Disable fw download */
|
|
gpio_set_value(info->gpio_fw, 0);
|
|
|
|
for (polarity = 0; polarity < 2; polarity++) {
|
|
info->en_polarity = polarity;
|
|
retry = 3;
|
|
while (retry--) {
|
|
/* power off */
|
|
gpio_set_value(info->gpio_en, !info->en_polarity);
|
|
usleep_range(10000, 15000);
|
|
|
|
/* power on */
|
|
gpio_set_value(info->gpio_en, info->en_polarity);
|
|
usleep_range(10000, 15000);
|
|
|
|
/* send reset */
|
|
dev_dbg(&info->i2c_dev->dev, "Sending reset cmd\n");
|
|
ret = i2c_master_send(info->i2c_dev, rset_cmd, count);
|
|
if (ret == count) {
|
|
dev_info(&info->i2c_dev->dev,
|
|
"nfc_en polarity : active %s\n",
|
|
(polarity == 0 ? "low" : "high"));
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
dev_err(&info->i2c_dev->dev,
|
|
"Could not detect nfc_en polarity, fallback to active high\n");
|
|
|
|
out:
|
|
gpio_set_value(info->gpio_en, !info->en_polarity);
|
|
}
|
|
|
|
static int pn544_hci_enable(struct pn544_hci_info *info, int mode)
|
|
{
|
|
pr_info(DRIVER_DESC ": %s\n", __func__);
|
|
|
|
gpio_set_value(info->gpio_fw, 0);
|
|
gpio_set_value(info->gpio_en, info->en_polarity);
|
|
usleep_range(10000, 15000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pn544_hci_disable(struct pn544_hci_info *info)
|
|
{
|
|
pr_info(DRIVER_DESC ": %s\n", __func__);
|
|
|
|
gpio_set_value(info->gpio_fw, 0);
|
|
gpio_set_value(info->gpio_en, !info->en_polarity);
|
|
usleep_range(10000, 15000);
|
|
|
|
gpio_set_value(info->gpio_en, info->en_polarity);
|
|
usleep_range(10000, 15000);
|
|
|
|
gpio_set_value(info->gpio_en, !info->en_polarity);
|
|
usleep_range(10000, 15000);
|
|
}
|
|
|
|
static int pn544_hci_i2c_write(struct i2c_client *client, u8 *buf, int len)
|
|
{
|
|
int r;
|
|
|
|
usleep_range(3000, 6000);
|
|
|
|
r = i2c_master_send(client, buf, len);
|
|
|
|
if (r == -EREMOTEIO) { /* Retry, chip was in standby */
|
|
usleep_range(6000, 10000);
|
|
r = i2c_master_send(client, buf, len);
|
|
}
|
|
|
|
if (r >= 0 && r != len)
|
|
r = -EREMOTEIO;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int check_crc(u8 *buf, int buflen)
|
|
{
|
|
int len;
|
|
u16 crc;
|
|
|
|
len = buf[0] + 1;
|
|
crc = crc_ccitt(0xffff, buf, len - 2);
|
|
crc = ~crc;
|
|
|
|
if (buf[len - 2] != (crc & 0xff) || buf[len - 1] != (crc >> 8)) {
|
|
pr_err(PN544_HCI_DRIVER_NAME ": CRC error 0x%x != 0x%x 0x%x\n",
|
|
crc, buf[len - 1], buf[len - 2]);
|
|
|
|
pr_info(DRIVER_DESC ": %s : BAD CRC\n", __func__);
|
|
print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
|
|
16, 2, buf, buflen, false);
|
|
return -EPERM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Reads an shdlc frame and returns it in a newly allocated sk_buff. Guarantees
|
|
* that i2c bus will be flushed and that next read will start on a new frame.
|
|
* returned skb contains only LLC header and payload.
|
|
* returns:
|
|
* -EREMOTEIO : i2c read error (fatal)
|
|
* -EBADMSG : frame was incorrect and discarded
|
|
* -ENOMEM : cannot allocate skb, frame dropped
|
|
*/
|
|
static int pn544_hci_i2c_read(struct i2c_client *client, struct sk_buff **skb)
|
|
{
|
|
int r;
|
|
u8 len;
|
|
u8 tmp[PN544_HCI_LLC_MAX_SIZE - 1];
|
|
|
|
r = i2c_master_recv(client, &len, 1);
|
|
if (r != 1) {
|
|
dev_err(&client->dev, "cannot read len byte\n");
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
if ((len < (PN544_HCI_LLC_MIN_SIZE - 1)) ||
|
|
(len > (PN544_HCI_LLC_MAX_SIZE - 1))) {
|
|
dev_err(&client->dev, "invalid len byte\n");
|
|
r = -EBADMSG;
|
|
goto flush;
|
|
}
|
|
|
|
*skb = alloc_skb(1 + len, GFP_KERNEL);
|
|
if (*skb == NULL) {
|
|
r = -ENOMEM;
|
|
goto flush;
|
|
}
|
|
|
|
*skb_put(*skb, 1) = len;
|
|
|
|
r = i2c_master_recv(client, skb_put(*skb, len), len);
|
|
if (r != len) {
|
|
kfree_skb(*skb);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
r = check_crc((*skb)->data, (*skb)->len);
|
|
if (r != 0) {
|
|
kfree_skb(*skb);
|
|
r = -EBADMSG;
|
|
goto flush;
|
|
}
|
|
|
|
skb_pull(*skb, 1);
|
|
skb_trim(*skb, (*skb)->len - 2);
|
|
|
|
usleep_range(3000, 6000);
|
|
|
|
return 0;
|
|
|
|
flush:
|
|
if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0)
|
|
r = -EREMOTEIO;
|
|
|
|
usleep_range(3000, 6000);
|
|
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Reads an shdlc frame from the chip. This is not as straightforward as it
|
|
* seems. There are cases where we could loose the frame start synchronization.
|
|
* The frame format is len-data-crc, and corruption can occur anywhere while
|
|
* transiting on i2c bus, such that we could read an invalid len.
|
|
* In order to recover synchronization with the next frame, we must be sure
|
|
* to read the real amount of data without using the len byte. We do this by
|
|
* assuming the following:
|
|
* - the chip will always present only one single complete frame on the bus
|
|
* before triggering the interrupt
|
|
* - the chip will not present a new frame until we have completely read
|
|
* the previous one (or until we have handled the interrupt).
|
|
* The tricky case is when we read a corrupted len that is less than the real
|
|
* len. We must detect this here in order to determine that we need to flush
|
|
* the bus. This is the reason why we check the crc here.
|
|
*/
|
|
static irqreturn_t pn544_hci_irq_thread_fn(int irq, void *dev_id)
|
|
{
|
|
struct pn544_hci_info *info = dev_id;
|
|
struct i2c_client *client = info->i2c_dev;
|
|
struct sk_buff *skb = NULL;
|
|
int r;
|
|
|
|
BUG_ON(!info);
|
|
BUG_ON(irq != info->i2c_dev->irq);
|
|
|
|
dev_dbg(&client->dev, "IRQ\n");
|
|
|
|
if (info->hard_fault != 0)
|
|
return IRQ_HANDLED;
|
|
|
|
r = pn544_hci_i2c_read(client, &skb);
|
|
if (r == -EREMOTEIO) {
|
|
info->hard_fault = r;
|
|
|
|
nfc_shdlc_recv_frame(info->shdlc, NULL);
|
|
|
|
return IRQ_HANDLED;
|
|
} else if ((r == -ENOMEM) || (r == -EBADMSG)) {
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
nfc_shdlc_recv_frame(info->shdlc, skb);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int pn544_hci_open(struct nfc_shdlc *shdlc)
|
|
{
|
|
struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
|
|
int r = 0;
|
|
|
|
mutex_lock(&info->info_lock);
|
|
|
|
if (info->state != PN544_ST_COLD) {
|
|
r = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
r = pn544_hci_enable(info, HCI_MODE);
|
|
|
|
if (r == 0)
|
|
info->state = PN544_ST_READY;
|
|
|
|
out:
|
|
mutex_unlock(&info->info_lock);
|
|
return r;
|
|
}
|
|
|
|
static void pn544_hci_close(struct nfc_shdlc *shdlc)
|
|
{
|
|
struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
|
|
|
|
mutex_lock(&info->info_lock);
|
|
|
|
if (info->state == PN544_ST_COLD)
|
|
goto out;
|
|
|
|
pn544_hci_disable(info);
|
|
|
|
info->state = PN544_ST_COLD;
|
|
|
|
out:
|
|
mutex_unlock(&info->info_lock);
|
|
}
|
|
|
|
static int pn544_hci_ready(struct nfc_shdlc *shdlc)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
|
|
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},
|
|
|
|
{{0x9e, 0xd9}, 0xff},
|
|
{{0x9e, 0xda}, 0xff},
|
|
{{0x9e, 0xdb}, 0x23},
|
|
{{0x9e, 0xdc}, 0x21},
|
|
{{0x9e, 0xdd}, 0x22},
|
|
{{0x9e, 0xde}, 0x24},
|
|
|
|
{{0x9c, 0x01}, 0x08},
|
|
|
|
{{0x9e, 0xaa}, 0x01},
|
|
|
|
{{0x9b, 0xd1}, 0x0d},
|
|
{{0x9b, 0xd2}, 0x24},
|
|
{{0x9b, 0xd3}, 0x0a},
|
|
{{0x9b, 0xd4}, 0x22},
|
|
{{0x9b, 0xd5}, 0x08},
|
|
{{0x9b, 0xd6}, 0x1e},
|
|
{{0x9b, 0xdd}, 0x1c},
|
|
|
|
{{0x9b, 0x84}, 0x13},
|
|
{{0x99, 0x81}, 0x7f},
|
|
{{0x99, 0x31}, 0x70},
|
|
|
|
{{0x98, 0x00}, 0x3f},
|
|
|
|
{{0x9f, 0x09}, 0x00},
|
|
|
|
{{0x9f, 0x0a}, 0x05},
|
|
|
|
{{0x9e, 0xd1}, 0xa1},
|
|
{{0x99, 0x23}, 0x00},
|
|
|
|
{{0x9e, 0x74}, 0x80},
|
|
|
|
{{0x9f, 0x28}, 0x10},
|
|
|
|
{{0x9f, 0x35}, 0x14},
|
|
|
|
{{0x9f, 0x36}, 0x60},
|
|
|
|
{{0x9c, 0x31}, 0x00},
|
|
|
|
{{0x9c, 0x32}, 0xc8},
|
|
|
|
{{0x9c, 0x19}, 0x40},
|
|
|
|
{{0x9c, 0x1a}, 0x40},
|
|
|
|
{{0x9c, 0x0c}, 0x00},
|
|
|
|
{{0x9c, 0x0d}, 0x00},
|
|
|
|
{{0x9c, 0x12}, 0x00},
|
|
|
|
{{0x9c, 0x13}, 0x00},
|
|
|
|
{{0x98, 0xa2}, 0x0e},
|
|
|
|
{{0x98, 0x93}, 0x40},
|
|
|
|
{{0x98, 0x7d}, 0x02},
|
|
{{0x98, 0x7e}, 0x00},
|
|
{{0x9f, 0xc8}, 0x01},
|
|
};
|
|
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_shdlc *shdlc, struct sk_buff *skb)
|
|
{
|
|
struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
|
|
struct i2c_client *client = info->i2c_dev;
|
|
|
|
if (info->hard_fault != 0)
|
|
return info->hard_fault;
|
|
|
|
return pn544_hci_i2c_write(client, skb->data, skb->len);
|
|
}
|
|
|
|
static int pn544_hci_start_poll(struct nfc_shdlc *shdlc,
|
|
u32 im_protocols, u32 tm_protocols)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
|
|
u8 phases = 0;
|
|
int r;
|
|
u8 duration[2];
|
|
u8 activated;
|
|
|
|
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;
|
|
|
|
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_target_from_gate(struct nfc_shdlc *shdlc, 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;
|
|
default:
|
|
return -EPROTO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pn544_hci_complete_target_discovered(struct nfc_shdlc *shdlc,
|
|
u8 gate,
|
|
struct nfc_target *target)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
|
|
struct sk_buff *uid_skb;
|
|
int r = 0;
|
|
|
|
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;
|
|
}
|
|
|
|
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 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_data_exchange(struct nfc_shdlc *shdlc,
|
|
struct nfc_target *target,
|
|
struct sk_buff *skb,
|
|
struct sk_buff **res_skb)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
|
|
int r;
|
|
|
|
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(hdev, target->hci_reader_gate,
|
|
PN544_MIFARE_CMD,
|
|
skb->data, skb->len, res_skb);
|
|
} else
|
|
return 1;
|
|
case PN544_RF_READER_F_GATE:
|
|
*skb_push(skb, 1) = 0;
|
|
*skb_push(skb, 1) = 0;
|
|
|
|
r = nfc_hci_send_cmd(hdev, target->hci_reader_gate,
|
|
PN544_FELICA_RAW,
|
|
skb->data, skb->len, res_skb);
|
|
if (r == 0)
|
|
skb_pull(*res_skb, 1);
|
|
return r;
|
|
case PN544_RF_READER_JEWEL_GATE:
|
|
return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
|
|
PN544_JEWEL_RAW_CMD,
|
|
skb->data, skb->len, res_skb);
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static int pn544_hci_check_presence(struct nfc_shdlc *shdlc,
|
|
struct nfc_target *target)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
|
|
|
|
return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
|
|
PN544_RF_READER_CMD_PRESENCE_CHECK,
|
|
NULL, 0, NULL);
|
|
}
|
|
|
|
static struct nfc_shdlc_ops pn544_shdlc_ops = {
|
|
.open = pn544_hci_open,
|
|
.close = pn544_hci_close,
|
|
.hci_ready = pn544_hci_ready,
|
|
.xmit = pn544_hci_xmit,
|
|
.start_poll = pn544_hci_start_poll,
|
|
.target_from_gate = pn544_hci_target_from_gate,
|
|
.complete_target_discovered = pn544_hci_complete_target_discovered,
|
|
.data_exchange = pn544_hci_data_exchange,
|
|
.check_presence = pn544_hci_check_presence,
|
|
};
|
|
|
|
static int __devinit pn544_hci_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct pn544_hci_info *info;
|
|
struct pn544_nfc_platform_data *pdata;
|
|
int r = 0;
|
|
u32 protocols;
|
|
struct nfc_hci_init_data init_data;
|
|
|
|
dev_dbg(&client->dev, "%s\n", __func__);
|
|
dev_dbg(&client->dev, "IRQ: %d\n", client->irq);
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
|
dev_err(&client->dev, "Need I2C_FUNC_I2C\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL);
|
|
if (!info) {
|
|
dev_err(&client->dev,
|
|
"Cannot allocate memory for pn544_hci_info.\n");
|
|
r = -ENOMEM;
|
|
goto err_info_alloc;
|
|
}
|
|
|
|
info->i2c_dev = client;
|
|
info->state = PN544_ST_COLD;
|
|
mutex_init(&info->info_lock);
|
|
i2c_set_clientdata(client, info);
|
|
|
|
pdata = client->dev.platform_data;
|
|
if (pdata == NULL) {
|
|
dev_err(&client->dev, "No platform data\n");
|
|
r = -EINVAL;
|
|
goto err_pdata;
|
|
}
|
|
|
|
if (pdata->request_resources == NULL) {
|
|
dev_err(&client->dev, "request_resources() missing\n");
|
|
r = -EINVAL;
|
|
goto err_pdata;
|
|
}
|
|
|
|
r = pdata->request_resources(client);
|
|
if (r) {
|
|
dev_err(&client->dev, "Cannot get platform resources\n");
|
|
goto err_pdata;
|
|
}
|
|
|
|
info->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
|
|
info->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET);
|
|
info->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ);
|
|
|
|
pn544_hci_platform_init(info);
|
|
|
|
r = request_threaded_irq(client->irq, NULL, pn544_hci_irq_thread_fn,
|
|
IRQF_TRIGGER_RISING, PN544_HCI_DRIVER_NAME,
|
|
info);
|
|
if (r < 0) {
|
|
dev_err(&client->dev, "Unable to register IRQ handler\n");
|
|
goto err_rti;
|
|
}
|
|
|
|
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->shdlc = nfc_shdlc_allocate(&pn544_shdlc_ops,
|
|
&init_data, protocols,
|
|
PN544_CMDS_HEADROOM, 0,
|
|
PN544_HCI_LLC_MAX_PAYLOAD,
|
|
dev_name(&client->dev));
|
|
if (!info->shdlc) {
|
|
dev_err(&client->dev, "Cannot allocate nfc shdlc.\n");
|
|
r = -ENOMEM;
|
|
goto err_allocshdlc;
|
|
}
|
|
|
|
nfc_shdlc_set_clientdata(info->shdlc, info);
|
|
|
|
return 0;
|
|
|
|
err_allocshdlc:
|
|
free_irq(client->irq, info);
|
|
|
|
err_rti:
|
|
if (pdata->free_resources != NULL)
|
|
pdata->free_resources();
|
|
|
|
err_pdata:
|
|
kfree(info);
|
|
|
|
err_info_alloc:
|
|
return r;
|
|
}
|
|
|
|
static __devexit int pn544_hci_remove(struct i2c_client *client)
|
|
{
|
|
struct pn544_hci_info *info = i2c_get_clientdata(client);
|
|
struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
|
|
|
|
dev_dbg(&client->dev, "%s\n", __func__);
|
|
|
|
nfc_shdlc_free(info->shdlc);
|
|
|
|
if (info->state != PN544_ST_COLD) {
|
|
if (pdata->disable)
|
|
pdata->disable();
|
|
}
|
|
|
|
free_irq(client->irq, info);
|
|
if (pdata->free_resources)
|
|
pdata->free_resources();
|
|
|
|
kfree(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver pn544_hci_driver = {
|
|
.driver = {
|
|
.name = PN544_HCI_DRIVER_NAME,
|
|
},
|
|
.probe = pn544_hci_probe,
|
|
.id_table = pn544_hci_id_table,
|
|
.remove = __devexit_p(pn544_hci_remove),
|
|
};
|
|
|
|
static int __init pn544_hci_init(void)
|
|
{
|
|
int r;
|
|
|
|
pr_debug(DRIVER_DESC ": %s\n", __func__);
|
|
|
|
r = i2c_add_driver(&pn544_hci_driver);
|
|
if (r) {
|
|
pr_err(PN544_HCI_DRIVER_NAME ": driver registration failed\n");
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit pn544_hci_exit(void)
|
|
{
|
|
i2c_del_driver(&pn544_hci_driver);
|
|
}
|
|
|
|
module_init(pn544_hci_init);
|
|
module_exit(pn544_hci_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|