diff options
Diffstat (limited to 'drivers/nfc/pn544')
| -rw-r--r-- | drivers/nfc/pn544/Makefile | 7 | ||||
| -rw-r--r-- | drivers/nfc/pn544/i2c.c | 500 | ||||
| -rw-r--r-- | drivers/nfc/pn544/pn544.c | 862 | ||||
| -rw-r--r-- | drivers/nfc/pn544/pn544.h | 32 |
4 files changed, 1401 insertions, 0 deletions
diff --git a/drivers/nfc/pn544/Makefile b/drivers/nfc/pn544/Makefile new file mode 100644 index 00000000000..725733881eb --- /dev/null +++ b/drivers/nfc/pn544/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for PN544 HCI based NFC driver +# + +obj-$(CONFIG_PN544_HCI_NFC) += pn544_i2c.o + +pn544_i2c-y := pn544.o i2c.o diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c new file mode 100644 index 00000000000..fb430d88235 --- /dev/null +++ b/drivers/nfc/pn544/i2c.c @@ -0,0 +1,500 @@ +/* + * I2C Link Layer for PN544 HCI based Driver + * + * 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/i2c.h> +#include <linux/gpio.h> +#include <linux/miscdevice.h> +#include <linux/interrupt.h> +#include <linux/delay.h> + +#include <linux/nfc/pn544.h> + +#include <net/nfc/hci.h> +#include <net/nfc/llc.h> + +#include "pn544.h" + +#define PN544_I2C_FRAME_HEADROOM 1 +#define PN544_I2C_FRAME_TAILROOM 2 + +/* framing in HCI mode */ +#define PN544_HCI_I2C_LLC_LEN 1 +#define PN544_HCI_I2C_LLC_CRC 2 +#define PN544_HCI_I2C_LLC_LEN_CRC (PN544_HCI_I2C_LLC_LEN + \ + PN544_HCI_I2C_LLC_CRC) +#define PN544_HCI_I2C_LLC_MIN_SIZE (1 + PN544_HCI_I2C_LLC_LEN_CRC) +#define PN544_HCI_I2C_LLC_MAX_PAYLOAD 29 +#define PN544_HCI_I2C_LLC_MAX_SIZE (PN544_HCI_I2C_LLC_LEN_CRC + 1 + \ + PN544_HCI_I2C_LLC_MAX_PAYLOAD) + +static struct i2c_device_id pn544_hci_i2c_id_table[] = { + {"pn544", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table); + +#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c" + +struct pn544_i2c_phy { + struct i2c_client *i2c_dev; + struct nfc_hci_dev *hdev; + + unsigned int gpio_en; + unsigned int gpio_irq; + unsigned int gpio_fw; + unsigned int en_polarity; + + int powered; + + int hard_fault; /* + * < 0 if hardware error occured (e.g. i2c err) + * and prevents normal operation. + */ +}; + +#define I2C_DUMP_SKB(info, skb) \ +do { \ + pr_debug("%s:\n", info); \ + print_hex_dump(KERN_DEBUG, "i2c: ", DUMP_PREFIX_OFFSET, \ + 16, 1, (skb)->data, (skb)->len, 0); \ +} while (0) + +static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy) +{ + 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(&phy->i2c_dev->dev, "Detecting nfc_en polarity\n"); + + /* Disable fw download */ + gpio_set_value(phy->gpio_fw, 0); + + for (polarity = 0; polarity < 2; polarity++) { + phy->en_polarity = polarity; + retry = 3; + while (retry--) { + /* power off */ + gpio_set_value(phy->gpio_en, !phy->en_polarity); + usleep_range(10000, 15000); + + /* power on */ + gpio_set_value(phy->gpio_en, phy->en_polarity); + usleep_range(10000, 15000); + + /* send reset */ + dev_dbg(&phy->i2c_dev->dev, "Sending reset cmd\n"); + ret = i2c_master_send(phy->i2c_dev, rset_cmd, count); + if (ret == count) { + dev_info(&phy->i2c_dev->dev, + "nfc_en polarity : active %s\n", + (polarity == 0 ? "low" : "high")); + goto out; + } + } + } + + dev_err(&phy->i2c_dev->dev, + "Could not detect nfc_en polarity, fallback to active high\n"); + +out: + gpio_set_value(phy->gpio_en, !phy->en_polarity); +} + +static int pn544_hci_i2c_enable(void *phy_id) +{ + struct pn544_i2c_phy *phy = phy_id; + + pr_info(DRIVER_DESC ": %s\n", __func__); + + gpio_set_value(phy->gpio_fw, 0); + gpio_set_value(phy->gpio_en, phy->en_polarity); + usleep_range(10000, 15000); + + phy->powered = 1; + + return 0; +} + +static void pn544_hci_i2c_disable(void *phy_id) +{ + struct pn544_i2c_phy *phy = phy_id; + + pr_info(DRIVER_DESC ": %s\n", __func__); + + gpio_set_value(phy->gpio_fw, 0); + gpio_set_value(phy->gpio_en, !phy->en_polarity); + usleep_range(10000, 15000); + + gpio_set_value(phy->gpio_en, phy->en_polarity); + usleep_range(10000, 15000); + + gpio_set_value(phy->gpio_en, !phy->en_polarity); + usleep_range(10000, 15000); + + phy->powered = 0; +} + +static void pn544_hci_i2c_add_len_crc(struct sk_buff *skb) +{ + u16 crc; + int len; + + len = skb->len + 2; + *skb_push(skb, 1) = len; + + crc = crc_ccitt(0xffff, skb->data, skb->len); + crc = ~crc; + *skb_put(skb, 1) = crc & 0xff; + *skb_put(skb, 1) = crc >> 8; +} + +static void pn544_hci_i2c_remove_len_crc(struct sk_buff *skb) +{ + skb_pull(skb, PN544_I2C_FRAME_HEADROOM); + skb_trim(skb, PN544_I2C_FRAME_TAILROOM); +} + +/* + * Writing a frame must not return the number of written bytes. + * It must return either zero for success, or <0 for error. + * In addition, it must not alter the skb + */ +static int pn544_hci_i2c_write(void *phy_id, struct sk_buff *skb) +{ + int r; + struct pn544_i2c_phy *phy = phy_id; + struct i2c_client *client = phy->i2c_dev; + + if (phy->hard_fault != 0) + return phy->hard_fault; + + usleep_range(3000, 6000); + + pn544_hci_i2c_add_len_crc(skb); + + I2C_DUMP_SKB("i2c frame written", skb); + + r = i2c_master_send(client, skb->data, skb->len); + + if (r == -EREMOTEIO) { /* Retry, chip was in standby */ + usleep_range(6000, 10000); + r = i2c_master_send(client, skb->data, skb->len); + } + + if (r >= 0) { + if (r != skb->len) + r = -EREMOTEIO; + else + r = 0; + } + + pn544_hci_i2c_remove_len_crc(skb); + + 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_I2C_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 pn544_i2c_phy *phy, struct sk_buff **skb) +{ + int r; + u8 len; + u8 tmp[PN544_HCI_I2C_LLC_MAX_SIZE - 1]; + struct i2c_client *client = phy->i2c_dev; + + 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_I2C_LLC_MIN_SIZE - 1)) || + (len > (PN544_HCI_I2C_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; + } + + I2C_DUMP_SKB("i2c frame read", *skb); + + 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_i2c_irq_thread_fn(int irq, void *phy_id) +{ + struct pn544_i2c_phy *phy = phy_id; + struct i2c_client *client; + struct sk_buff *skb = NULL; + int r; + + if (!phy || irq != phy->i2c_dev->irq) { + WARN_ON_ONCE(1); + return IRQ_NONE; + } + + client = phy->i2c_dev; + dev_dbg(&client->dev, "IRQ\n"); + + if (phy->hard_fault != 0) + return IRQ_HANDLED; + + r = pn544_hci_i2c_read(phy, &skb); + if (r == -EREMOTEIO) { + phy->hard_fault = r; + + nfc_hci_recv_frame(phy->hdev, NULL); + + return IRQ_HANDLED; + } else if ((r == -ENOMEM) || (r == -EBADMSG)) { + return IRQ_HANDLED; + } + + nfc_hci_recv_frame(phy->hdev, skb); + + return IRQ_HANDLED; +} + +static struct nfc_phy_ops i2c_phy_ops = { + .write = pn544_hci_i2c_write, + .enable = pn544_hci_i2c_enable, + .disable = pn544_hci_i2c_disable, +}; + +static int __devinit pn544_hci_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pn544_i2c_phy *phy; + struct pn544_nfc_platform_data *pdata; + int r = 0; + + 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; + } + + phy = kzalloc(sizeof(struct pn544_i2c_phy), GFP_KERNEL); + if (!phy) { + dev_err(&client->dev, + "Cannot allocate memory for pn544 i2c phy.\n"); + r = -ENOMEM; + goto err_phy_alloc; + } + + phy->i2c_dev = client; + i2c_set_clientdata(client, phy); + + 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; + } + + phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE); + phy->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET); + phy->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ); + + pn544_hci_i2c_platform_init(phy); + + r = request_threaded_irq(client->irq, NULL, pn544_hci_i2c_irq_thread_fn, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + PN544_HCI_I2C_DRIVER_NAME, phy); + if (r < 0) { + dev_err(&client->dev, "Unable to register IRQ handler\n"); + goto err_rti; + } + + r = pn544_hci_probe(phy, &i2c_phy_ops, LLC_SHDLC_NAME, + PN544_I2C_FRAME_HEADROOM, PN544_I2C_FRAME_TAILROOM, + PN544_HCI_I2C_LLC_MAX_PAYLOAD, &phy->hdev); + if (r < 0) + goto err_hci; + + return 0; + +err_hci: + free_irq(client->irq, phy); + +err_rti: + if (pdata->free_resources != NULL) + pdata->free_resources(); + +err_pdata: + kfree(phy); + +err_phy_alloc: + return r; +} + +static __devexit int pn544_hci_i2c_remove(struct i2c_client *client) +{ + struct pn544_i2c_phy *phy = i2c_get_clientdata(client); + struct pn544_nfc_platform_data *pdata = client->dev.platform_data; + + dev_dbg(&client->dev, "%s\n", __func__); + + pn544_hci_remove(phy->hdev); + + if (phy->powered) + pn544_hci_i2c_disable(phy); + + free_irq(client->irq, phy); + if (pdata->free_resources) + pdata->free_resources(); + + kfree(phy); + + return 0; +} + +static struct i2c_driver pn544_hci_i2c_driver = { + .driver = { + .name = PN544_HCI_I2C_DRIVER_NAME, + }, + .probe = pn544_hci_i2c_probe, + .id_table = pn544_hci_i2c_id_table, + .remove = __devexit_p(pn544_hci_i2c_remove), +}; + +static int __init pn544_hci_i2c_init(void) +{ + int r; + + pr_debug(DRIVER_DESC ": %s\n", __func__); + + r = i2c_add_driver(&pn544_hci_i2c_driver); + if (r) { + pr_err(PN544_HCI_I2C_DRIVER_NAME + ": driver registration failed\n"); + return r; + } + + return 0; +} + +static void __exit pn544_hci_i2c_exit(void) +{ + i2c_del_driver(&pn544_hci_i2c_driver); +} + +module_init(pn544_hci_i2c_init); +module_exit(pn544_hci_i2c_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c new file mode 100644 index 00000000000..cf344450815 --- /dev/null +++ b/drivers/nfc/pn544/pn544.c @@ -0,0 +1,862 @@ +/* + * 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/delay.h> +#include <linux/slab.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 + +#define HCI_MODE 0 +#define FW_MODE 1 + +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_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_NFC_WI_MGMT_GATE 0xA1 + +#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_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; +}; + +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}, + + {{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_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", 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; + } + + 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); + + 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; + target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; + } 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: + *skb_push(skb, 1) = 0; + *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: + *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) +{ + /* Set default false for multiple information chaining */ + *skb_push(skb, 1) = 0; + + return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, + PN544_HCI_EVT_SND_DATA, skb->data, skb->len); +} + +static int pn544_hci_check_presence(struct nfc_hci_dev *hdev, + struct nfc_target *target) +{ + pr_debug("supported protocol %d", 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) { + return nfc_hci_send_cmd(hdev, target->hci_reader_gate, + PN544_JEWEL_RAW_CMD, NULL, 0, NULL); + } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) { + return nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, + PN544_FELICA_RAW, NULL, 0, NULL); + } 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; +} + +void pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event, + struct sk_buff *skb) +{ + struct sk_buff *rgb_skb = NULL; + int r = 0; + + pr_debug("hci event %d", event); + switch (event) { + case PN544_HCI_EVT_ACTIVATED: + if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) + 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; + + nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, + NFC_COMM_PASSIVE, rgb_skb->data, + rgb_skb->len); + + kfree_skb(rgb_skb); + } + + break; + case PN544_HCI_EVT_DEACTIVATED: + 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", skb->data[0]); + r = -EPROTO; + goto exit; + } + + skb_pull(skb, 2); + nfc_tm_data_received(hdev->ndev, skb); + + return; + default: + break; + } + +exit: + kfree_skb(skb); +} + +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, +}; + +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, + 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) { + pr_err("Cannot allocate memory for pn544_hci_info.\n"); + r = -ENOMEM; + goto err_info_alloc; + } + + info->phy_ops = phy_ops; + info->phy_id = phy_id; + 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, + 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; +} + +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); +} diff --git a/drivers/nfc/pn544/pn544.h b/drivers/nfc/pn544/pn544.h new file mode 100644 index 00000000000..f47c6454914 --- /dev/null +++ b/drivers/nfc/pn544/pn544.h @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2011 - 2012 Intel Corporation. All rights reserved. + * + * 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. + */ + +#ifndef __LOCAL_PN544_H_ +#define __LOCAL_PN544_H_ + +#include <net/nfc/hci.h> + +#define DRIVER_DESC "HCI NFC driver for PN544" + +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, + struct nfc_hci_dev **hdev); +void pn544_hci_remove(struct nfc_hci_dev *hdev); + +#endif /* __LOCAL_PN544_H_ */ |