diff options
26 files changed, 1207 insertions, 55 deletions
diff --git a/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt b/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt new file mode 100644 index 000000000000..5b6cd9b3f628 --- /dev/null +++ b/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt @@ -0,0 +1,35 @@ +* NXP Semiconductors NXP NCI NFC Controllers + +Required properties: +- compatible: Should be "nxp,nxp-nci-i2c". +- clock-frequency: I²C work frequency. +- reg: address on the bus +- interrupt-parent: phandle for the interrupt gpio controller +- interrupts: GPIO interrupt to which the chip is connected +- enable-gpios: Output GPIO pin used for enabling/disabling the chip +- firmware-gpios: Output GPIO pin used to enter firmware download mode + +Optional SoC Specific Properties: +- pinctrl-names: Contains only one value - "default". +- pintctrl-0: Specifies the pin control groups used for this controller. + +Example (for ARM-based BeagleBone with NPC100 NFC controller on I2C2): + +&i2c2 { + + status = "okay"; + + npc100: npc100@29 { + + compatible = "nxp,nxp-nci-i2c"; + + reg = <0x29>; + clock-frequency = <100000>; + + interrupt-parent = <&gpio1>; + interrupts = <29 GPIO_ACTIVE_HIGH>; + + enable-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>; + firmware-gpios = <&gpio0 31 GPIO_ACTIVE_HIGH>; + }; +}; diff --git a/MAINTAINERS b/MAINTAINERS index 9091b4ad1cc3..dcaa54252479 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6944,6 +6944,13 @@ S: Supported F: drivers/block/nvme* F: include/linux/nvme.h +NXP-NCI NFC DRIVER +M: Clément Perrochaud <clement.perrochaud@effinnov.com> +R: Charles Gorand <charles.gorand@effinnov.com> +L: linux-nfc@lists.01.org (moderated for non-subscribers) +S: Supported +F: drivers/nfc/nxp-nci + NXP TDA998X DRM DRIVER M: Russell King <rmk+kernel@arm.linux.org.uk> S: Supported diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig index 7929fac13e1c..107714e4405f 100644 --- a/drivers/nfc/Kconfig +++ b/drivers/nfc/Kconfig @@ -73,4 +73,5 @@ source "drivers/nfc/microread/Kconfig" source "drivers/nfc/nfcmrvl/Kconfig" source "drivers/nfc/st21nfca/Kconfig" source "drivers/nfc/st21nfcb/Kconfig" +source "drivers/nfc/nxp-nci/Kconfig" endmenu diff --git a/drivers/nfc/Makefile b/drivers/nfc/Makefile index 6b23a2c6e34a..a4292d790f9b 100644 --- a/drivers/nfc/Makefile +++ b/drivers/nfc/Makefile @@ -13,5 +13,6 @@ obj-$(CONFIG_NFC_MRVL) += nfcmrvl/ obj-$(CONFIG_NFC_TRF7970A) += trf7970a.o obj-$(CONFIG_NFC_ST21NFCA) += st21nfca/ obj-$(CONFIG_NFC_ST21NFCB) += st21nfcb/ +obj-$(CONFIG_NFC_NXP_NCI) += nxp-nci/ ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG diff --git a/drivers/nfc/microread/i2c.c b/drivers/nfc/microread/i2c.c index df85cd3d9db0..661e2c8143c4 100644 --- a/drivers/nfc/microread/i2c.c +++ b/drivers/nfc/microread/i2c.c @@ -286,7 +286,7 @@ static int microread_i2c_probe(struct i2c_client *client, if (r < 0) goto err_irq; - nfc_info(&client->dev, "Probed"); + nfc_info(&client->dev, "Probed\n"); return 0; diff --git a/drivers/nfc/nfcmrvl/main.c b/drivers/nfc/nfcmrvl/main.c index 85e8bcf98693..ad4933cefbd1 100644 --- a/drivers/nfc/nfcmrvl/main.c +++ b/drivers/nfc/nfcmrvl/main.c @@ -111,7 +111,7 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data, priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols, 0, 0); if (!priv->ndev) { - nfc_err(dev, "nci_allocate_device failed"); + nfc_err(dev, "nci_allocate_device failed\n"); rc = -ENOMEM; goto error; } @@ -120,7 +120,7 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data, rc = nci_register_device(priv->ndev); if (rc) { - nfc_err(dev, "nci_register_device failed %d", rc); + nfc_err(dev, "nci_register_device failed %d\n", rc); nci_free_device(priv->ndev); goto error; } diff --git a/drivers/nfc/nfcmrvl/usb.c b/drivers/nfc/nfcmrvl/usb.c index 3221ca37d6c9..6cf15c1a2618 100644 --- a/drivers/nfc/nfcmrvl/usb.c +++ b/drivers/nfc/nfcmrvl/usb.c @@ -80,7 +80,7 @@ static void nfcmrvl_bulk_complete(struct urb *urb) if (!urb->status) { if (nfcmrvl_nci_recv_frame(drv_data->priv, urb->transfer_buffer, urb->actual_length) < 0) - nfc_err(&drv_data->udev->dev, "corrupted Rx packet"); + nfc_err(&drv_data->udev->dev, "corrupted Rx packet\n"); } if (!test_bit(NFCMRVL_USB_BULK_RUNNING, &drv_data->flags)) @@ -96,7 +96,7 @@ static void nfcmrvl_bulk_complete(struct urb *urb) */ if (err != -EPERM && err != -ENODEV) nfc_err(&drv_data->udev->dev, - "urb %p failed to resubmit (%d)", urb, -err); + "urb %p failed to resubmit (%d)\n", urb, -err); usb_unanchor_urb(urb); } } @@ -137,7 +137,7 @@ nfcmrvl_submit_bulk_urb(struct nfcmrvl_usb_drv_data *drv_data, gfp_t mem_flags) if (err) { if (err != -EPERM && err != -ENODEV) nfc_err(&drv_data->udev->dev, - "urb %p submission failed (%d)", urb, -err); + "urb %p submission failed (%d)\n", urb, -err); usb_unanchor_urb(urb); } @@ -153,7 +153,7 @@ static void nfcmrvl_tx_complete(struct urb *urb) struct nfcmrvl_private *priv = nci_get_drvdata(ndev); struct nfcmrvl_usb_drv_data *drv_data = priv->drv_data; - nfc_info(priv->dev, "urb %p status %d count %d", + nfc_info(priv->dev, "urb %p status %d count %d\n", urb, urb->status, urb->actual_length); spin_lock(&drv_data->txlock); @@ -253,7 +253,7 @@ static int nfcmrvl_usb_nci_send(struct nfcmrvl_private *priv, if (err) { if (err != -EPERM && err != -ENODEV) nfc_err(&drv_data->udev->dev, - "urb %p submission failed (%d)", urb, -err); + "urb %p submission failed (%d)\n", urb, -err); kfree(urb->setup_packet); usb_unanchor_urb(urb); } else { @@ -293,7 +293,7 @@ static int nfcmrvl_probe(struct usb_interface *intf, int i; struct usb_device *udev = interface_to_usbdev(intf); - nfc_info(&udev->dev, "intf %p id %p", intf, id); + nfc_info(&udev->dev, "intf %p id %p\n", intf, id); drv_data = devm_kzalloc(&intf->dev, sizeof(*drv_data), GFP_KERNEL); if (!drv_data) @@ -348,7 +348,7 @@ static void nfcmrvl_disconnect(struct usb_interface *intf) if (!drv_data) return; - nfc_info(&drv_data->udev->dev, "intf %p", intf); + nfc_info(&drv_data->udev->dev, "intf %p\n", intf); nfcmrvl_nci_unregister_dev(drv_data->priv); @@ -360,7 +360,7 @@ static int nfcmrvl_suspend(struct usb_interface *intf, pm_message_t message) { struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf); - nfc_info(&drv_data->udev->dev, "intf %p", intf); + nfc_info(&drv_data->udev->dev, "intf %p\n", intf); if (drv_data->suspend_count++) return 0; @@ -401,7 +401,7 @@ static int nfcmrvl_resume(struct usb_interface *intf) struct nfcmrvl_usb_drv_data *drv_data = usb_get_intfdata(intf); int err = 0; - nfc_info(&drv_data->udev->dev, "intf %p", intf); + nfc_info(&drv_data->udev->dev, "intf %p\n", intf); if (--drv_data->suspend_count) return 0; diff --git a/drivers/nfc/nxp-nci/Kconfig b/drivers/nfc/nxp-nci/Kconfig new file mode 100644 index 000000000000..37b40612520d --- /dev/null +++ b/drivers/nfc/nxp-nci/Kconfig @@ -0,0 +1,25 @@ +config NFC_NXP_NCI + tristate "NXP-NCI NFC driver" + depends on NFC_NCI + default n + ---help--- + Generic core driver for NXP NCI chips such as the NPC100 + or PN7150 families. + This is a driver based on the NCI NFC kernel layers and + will thus not work with NXP libnfc library. + + To compile this driver as a module, choose m here. The module will + be called nxp_nci. + Say N if unsure. + +config NFC_NXP_NCI_I2C + tristate "NXP-NCI I2C support" + depends on NFC_NXP_NCI && I2C + ---help--- + This module adds support for an I2C interface to the NXP NCI + chips. + Select this if your platform is using the I2C bus. + + To compile this driver as a module, choose m here. The module will + be called nxp_nci_i2c. + Say Y if unsure. diff --git a/drivers/nfc/nxp-nci/Makefile b/drivers/nfc/nxp-nci/Makefile new file mode 100644 index 000000000000..c008be30bb18 --- /dev/null +++ b/drivers/nfc/nxp-nci/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for NXP-NCI NFC driver +# + +nxp-nci-objs = core.o firmware.o +nxp-nci_i2c-objs = i2c.o + +obj-$(CONFIG_NFC_NXP_NCI) += nxp-nci.o +obj-$(CONFIG_NFC_NXP_NCI_I2C) += nxp-nci_i2c.o + +ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG diff --git a/drivers/nfc/nxp-nci/core.c b/drivers/nfc/nxp-nci/core.c new file mode 100644 index 000000000000..8979636d48ea --- /dev/null +++ b/drivers/nfc/nxp-nci/core.c @@ -0,0 +1,186 @@ +/* + * Generic driver for NXP NCI NFC chips + * + * Copyright (C) 2014 NXP Semiconductors All rights reserved. + * + * Authors: Clément Perrochaud <clement.perrochaud@nxp.com> + * + * Derived from PN544 device 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/nfc.h> +#include <linux/platform_data/nxp-nci.h> + +#include <net/nfc/nci_core.h> + +#include "nxp-nci.h" + +#define NXP_NCI_HDR_LEN 4 + +#define NXP_NCI_NFC_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) + +static int nxp_nci_open(struct nci_dev *ndev) +{ + struct nxp_nci_info *info = nci_get_drvdata(ndev); + int r = 0; + + mutex_lock(&info->info_lock); + + if (info->mode != NXP_NCI_MODE_COLD) { + r = -EBUSY; + goto open_exit; + } + + if (info->phy_ops->set_mode) + r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI); + + info->mode = NXP_NCI_MODE_NCI; + +open_exit: + mutex_unlock(&info->info_lock); + return r; +} + +static int nxp_nci_close(struct nci_dev *ndev) +{ + struct nxp_nci_info *info = nci_get_drvdata(ndev); + int r = 0; + + mutex_lock(&info->info_lock); + + if (info->phy_ops->set_mode) + r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD); + + info->mode = NXP_NCI_MODE_COLD; + + mutex_unlock(&info->info_lock); + return r; +} + +static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct nxp_nci_info *info = nci_get_drvdata(ndev); + int r; + + if (!info->phy_ops->write) { + r = -ENOTSUPP; + goto send_exit; + } + + if (info->mode != NXP_NCI_MODE_NCI) { + r = -EINVAL; + goto send_exit; + } + + r = info->phy_ops->write(info->phy_id, skb); + if (r < 0) + kfree_skb(skb); + +send_exit: + return r; +} + +static struct nci_ops nxp_nci_ops = { + .open = nxp_nci_open, + .close = nxp_nci_close, + .send = nxp_nci_send, + .fw_download = nxp_nci_fw_download, +}; + +int nxp_nci_probe(void *phy_id, struct device *pdev, + struct nxp_nci_phy_ops *phy_ops, unsigned int max_payload, + struct nci_dev **ndev) +{ + struct nxp_nci_info *info; + int r; + + info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL); + if (!info) { + r = -ENOMEM; + goto probe_exit; + } + + info->phy_id = phy_id; + info->pdev = pdev; + info->phy_ops = phy_ops; + info->max_payload = max_payload; + INIT_WORK(&info->fw_info.work, nxp_nci_fw_work); + init_completion(&info->fw_info.cmd_completion); + mutex_init(&info->info_lock); + + if (info->phy_ops->set_mode) { + r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD); + if (r < 0) + goto probe_exit; + } + + info->mode = NXP_NCI_MODE_COLD; + + info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS, + NXP_NCI_HDR_LEN, 0); + if (!info->ndev) { + r = -ENOMEM; + goto probe_exit; + } + + nci_set_parent_dev(info->ndev, pdev); + nci_set_drvdata(info->ndev, info); + r = nci_register_device(info->ndev); + if (r < 0) + goto probe_exit_free_nci; + + *ndev = info->ndev; + + goto probe_exit; + +probe_exit_free_nci: + nci_free_device(info->ndev); +probe_exit: + return r; +} +EXPORT_SYMBOL(nxp_nci_probe); + +void nxp_nci_remove(struct nci_dev *ndev) +{ + struct nxp_nci_info *info = nci_get_drvdata(ndev); + + if (info->mode == NXP_NCI_MODE_FW) + nxp_nci_fw_work_complete(info, -ESHUTDOWN); + cancel_work_sync(&info->fw_info.work); + + mutex_lock(&info->info_lock); + + if (info->phy_ops->set_mode) + info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD); + + nci_unregister_device(ndev); + nci_free_device(ndev); + + mutex_unlock(&info->info_lock); +} +EXPORT_SYMBOL(nxp_nci_remove); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NXP NCI NFC driver"); +MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>"); diff --git a/drivers/nfc/nxp-nci/firmware.c b/drivers/nfc/nxp-nci/firmware.c new file mode 100644 index 000000000000..5291797324ba --- /dev/null +++ b/drivers/nfc/nxp-nci/firmware.c @@ -0,0 +1,325 @@ +/* + * Generic driver for NXP NCI NFC chips + * + * Copyright (C) 2014 NXP Semiconductors All rights reserved. + * + * Author: Clément Perrochaud <clement.perrochaud@nxp.com> + * + * Derived from PN544 device 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/completion.h> +#include <linux/firmware.h> +#include <linux/nfc.h> +#include <linux/unaligned/access_ok.h> + +#include "nxp-nci.h" + +/* Crypto operations can take up to 30 seconds */ +#define NXP_NCI_FW_ANSWER_TIMEOUT msecs_to_jiffies(30000) + +#define NXP_NCI_FW_CMD_RESET 0xF0 +#define NXP_NCI_FW_CMD_GETVERSION 0xF1 +#define NXP_NCI_FW_CMD_CHECKINTEGRITY 0xE0 +#define NXP_NCI_FW_CMD_WRITE 0xC0 +#define NXP_NCI_FW_CMD_READ 0xA2 +#define NXP_NCI_FW_CMD_GETSESSIONSTATE 0xF2 +#define NXP_NCI_FW_CMD_LOG 0xA7 +#define NXP_NCI_FW_CMD_FORCE 0xD0 +#define NXP_NCI_FW_CMD_GET_DIE_ID 0xF4 + +#define NXP_NCI_FW_CHUNK_FLAG 0x0400 + +#define NXP_NCI_FW_RESULT_OK 0x00 +#define NXP_NCI_FW_RESULT_INVALID_ADDR 0x01 +#define NXP_NCI_FW_RESULT_GENERIC_ERROR 0x02 +#define NXP_NCI_FW_RESULT_UNKNOWN_CMD 0x0B +#define NXP_NCI_FW_RESULT_ABORTED_CMD 0x0C +#define NXP_NCI_FW_RESULT_PLL_ERROR 0x0D +#define NXP_NCI_FW_RESULT_ADDR_RANGE_OFL_ERROR 0x1E +#define NXP_NCI_FW_RESULT_BUFFER_OFL_ERROR 0x1F +#define NXP_NCI_FW_RESULT_MEM_BSY 0x20 +#define NXP_NCI_FW_RESULT_SIGNATURE_ERROR 0x21 +#define NXP_NCI_FW_RESULT_FIRMWARE_VERSION_ERROR 0x24 +#define NXP_NCI_FW_RESULT_PROTOCOL_ERROR 0x28 +#define NXP_NCI_FW_RESULT_SFWU_DEGRADED 0x2A +#define NXP_NCI_FW_RESULT_PH_STATUS_FIRST_CHUNK 0x2D +#define NXP_NCI_FW_RESULT_PH_STATUS_NEXT_CHUNK 0x2E +#define NXP_NCI_FW_RESULT_PH_STATUS_INTERNAL_ERROR_5 0xC5 + +void nxp_nci_fw_work_complete(struct nxp_nci_info *info, int result) +{ + struct nxp_nci_fw_info *fw_info = &info->fw_info; + int r; + + if (info->phy_ops->set_mode) { + r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD); + if (r < 0 && result == 0) + result = -r; + } + + info->mode = NXP_NCI_MODE_COLD; + + if (fw_info->fw) { + release_firmware(fw_info->fw); + fw_info->fw = NULL; + } + + nfc_fw_download_done(info->ndev->nfc_dev, fw_info->name, (u32) -result); +} + +/* crc_ccitt cannot be used since it is computed MSB first and not LSB first */ +static u16 nxp_nci_fw_crc(u8 const *buffer, size_t len) +{ + u16 crc = 0xffff; + + while (len--) { + crc = ((crc >> 8) | (crc << 8)) ^ *buffer++; + crc ^= (crc & 0xff) >> 4; + crc ^= (crc & 0xff) << 12; + crc ^= (crc & 0xff) << 5; + } + + return crc; +} + +static int nxp_nci_fw_send_chunk(struct nxp_nci_info *info) +{ + struct nxp_nci_fw_info *fw_info = &info->fw_info; + u16 header, crc; + struct sk_buff *skb; + size_t chunk_len; + size_t remaining_len; + int r; + + skb = nci_skb_alloc(info->ndev, info->max_payload, GFP_KERNEL); + if (!skb) { + r = -ENOMEM; + goto chunk_exit; + } + + chunk_len = info->max_payload - NXP_NCI_FW_HDR_LEN - NXP_NCI_FW_CRC_LEN; + remaining_len = fw_info->frame_size - fw_info->written; + + if (remaining_len > chunk_len) { + header = NXP_NCI_FW_CHUNK_FLAG; + } else { + chunk_len = remaining_len; + header = 0x0000; + } + + header |= chunk_len & NXP_NCI_FW_FRAME_LEN_MASK; + put_unaligned_be16(header, skb_put(skb, NXP_NCI_FW_HDR_LEN)); + + memcpy(skb_put(skb, chunk_len), fw_info->data + fw_info->written, + chunk_len); + + crc = nxp_nci_fw_crc(skb->data, chunk_len + NXP_NCI_FW_HDR_LEN); + put_unaligned_be16(crc, skb_put(skb, NXP_NCI_FW_CRC_LEN)); + + r = info->phy_ops->write(info->phy_id, skb); + if (r >= 0) + r = chunk_len; + + kfree_skb(skb); + +chunk_exit: + return r; +} + +static int nxp_nci_fw_send(struct nxp_nci_info *info) +{ + struct nxp_nci_fw_info *fw_info = &info->fw_info; + long completion_rc; + int r; + + reinit_completion(&fw_info->cmd_completion); + + if (fw_info->written == 0) { + fw_info->frame_size = get_unaligned_be16(fw_info->data) & + NXP_NCI_FW_FRAME_LEN_MASK; + fw_info->data += NXP_NCI_FW_HDR_LEN; + fw_info->size -= NXP_NCI_FW_HDR_LEN; + } + + if (fw_info->frame_size > fw_info->size) + return -EMSGSIZE; + + r = nxp_nci_fw_send_chunk(info); + if (r < 0) + return r; + + fw_info->written += r; + + if (*fw_info->data == NXP_NCI_FW_CMD_RESET) { + fw_info->cmd_result = 0; + if (fw_info->fw) + schedule_work(&fw_info->work); + } else { + completion_rc = wait_for_completion_interruptible_timeout( + &fw_info->cmd_completion, NXP_NCI_FW_ANSWER_TIMEOUT); + if (completion_rc == 0) + return -ETIMEDOUT; + } + + return 0; +} + +void nxp_nci_fw_work(struct work_struct *work) +{ + struct nxp_nci_info *info; + struct nxp_nci_fw_info *fw_info; + int r; + + fw_info = container_of(work, struct nxp_nci_fw_info, work); + info = container_of(fw_info, struct nxp_nci_info, fw_info); + + mutex_lock(&info->info_lock); + + r = fw_info->cmd_result; + if (r < 0) + goto exit_work; + + if (fw_info->written == fw_info->frame_size) { + fw_info->data += fw_info->frame_size; + fw_info->size -= fw_info->frame_size; + fw_info->written = 0; + } + + if (fw_info->size > 0) + r = nxp_nci_fw_send(info); + +exit_work: + if (r < 0 || fw_info->size == 0) + nxp_nci_fw_work_complete(info, r); + mutex_unlock(&info->info_lock); +} + +int nxp_nci_fw_download(struct nci_dev *ndev, const char *firmware_name) +{ + struct nxp_nci_info *info = nci_get_drvdata(ndev); + struct nxp_nci_fw_info *fw_info = &info->fw_info; + int r; + + mutex_lock(&info->info_lock); + + if (!info->phy_ops->set_mode || !info->phy_ops->write) { + r = -ENOTSUPP; + goto fw_download_exit; + } + + if (!firmware_name || firmware_name[0] == '\0') { + r = -EINVAL; + goto fw_download_exit; + } + + strcpy(fw_info->name, firmware_name); + + r = request_firmware(&fw_info->fw, firmware_name, + ndev->nfc_dev->dev.parent); + if (r < 0) + goto fw_download_exit; + + r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_FW); + if (r < 0) { + release_firmware(fw_info->fw); + goto fw_download_exit; + } + + info->mode = NXP_NCI_MODE_FW; + + fw_info->data = fw_info->fw->data; + fw_info->size = fw_info->fw->size; + fw_info->written = 0; + fw_info->frame_size = 0; + fw_info->cmd_result = 0; + + schedule_work(&fw_info->work); + +fw_download_exit: + mutex_unlock(&info->info_lock); + return r; +} + +static int nxp_nci_fw_read_status(u8 stat) +{ + switch (stat) { + case NXP_NCI_FW_RESULT_OK: + return 0; + case NXP_NCI_FW_RESULT_INVALID_ADDR: + return -EINVAL; + case NXP_NCI_FW_RESULT_UNKNOWN_CMD: + return -EINVAL; + case NXP_NCI_FW_RESULT_ABORTED_CMD: + return -EMSGSIZE; + case NXP_NCI_FW_RESULT_ADDR_RANGE_OFL_ERROR: + return -EADDRNOTAVAIL; + case NXP_NCI_FW_RESULT_BUFFER_OFL_ERROR: + return -ENOBUFS; + case NXP_NCI_FW_RESULT_MEM_BSY: + return -ENOKEY; + case NXP_NCI_FW_RESULT_SIGNATURE_ERROR: + return -EKEYREJECTED; + case NXP_NCI_FW_RESULT_FIRMWARE_VERSION_ERROR: + return -EALREADY; + case NXP_NCI_FW_RESULT_PROTOCOL_ERROR: + return -EPROTO; + case NXP_NCI_FW_RESULT_SFWU_DEGRADED: + return -EHWPOISON; + case NXP_NCI_FW_RESULT_PH_STATUS_FIRST_CHUNK: + return 0; + case NXP_NCI_FW_RESULT_PH_STATUS_NEXT_CHUNK: + return 0; + case NXP_NCI_FW_RESULT_PH_STATUS_INTERNAL_ERROR_5: + return -EINVAL; + default: + return -EIO; + } +} + +static u16 nxp_nci_fw_check_crc(struct sk_buff *skb) +{ + u16 crc, frame_crc; + size_t len = skb->len - NXP_NCI_FW_CRC_LEN; + + crc = nxp_nci_fw_crc(skb->data, len); + frame_crc = get_unaligned_be16(skb->data + len); + + return (crc ^ frame_crc); +} + +void nxp_nci_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct nxp_nci_info *info = nci_get_drvdata(ndev); + struct nxp_nci_fw_info *fw_info = &info->fw_info; + + complete(&fw_info->cmd_completion); + + if (skb) { + if (nxp_nci_fw_check_crc(skb) != 0x00) + fw_info->cmd_result = -EBADMSG; + else + fw_info->cmd_result = nxp_nci_fw_read_status( + *skb_pull(skb, NXP_NCI_FW_HDR_LEN)); + kfree_skb(skb); + } else { + fw_info->cmd_result = -EIO; + } + + if (fw_info->fw) + schedule_work(&fw_info->work); +} +EXPORT_SYMBOL(nxp_nci_fw_recv_frame); diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c new file mode 100644 index 000000000000..17bd67dbebf0 --- /dev/null +++ b/drivers/nfc/nxp-nci/i2c.c @@ -0,0 +1,415 @@ +/* + * I2C link layer for the NXP NCI driver + * + * Copyright (C) 2014 NXP Semiconductors All rights reserved. + * + * Authors: Clément Perrochaud <clement.perrochaud@nxp.com> + * + * Derived from PN544 device 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, see <http://www.gnu.org/licenses/>. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/miscdevice.h> +#include <linux/module.h> +#include <linux/nfc.h> +#include <linux/of_gpio.h> +#include <linux/of_irq.h> +#include <linux/platform_data/nxp-nci.h> +#include <linux/unaligned/access_ok.h> + +#include <net/nfc/nfc.h> + +#include "nxp-nci.h" + +#define NXP_NCI_I2C_DRIVER_NAME "nxp-nci_i2c" + +#define NXP_NCI_I2C_MAX_PAYLOAD 32 + +struct nxp_nci_i2c_phy { + struct i2c_client *i2c_dev; + struct nci_dev *ndev; + + unsigned int gpio_en; + unsigned int gpio_fw; + + int hard_fault; /* + * < 0 if hardware error occurred (e.g. i2c err) + * and prevents normal operation. + */ +}; + +static int nxp_nci_i2c_set_mode(void *phy_id, + enum nxp_nci_mode mode) +{ + struct nxp_nci_i2c_phy *phy = (struct nxp_nci_i2c_phy *) phy_id; + + gpio_set_value(phy->gpio_fw, (mode == NXP_NCI_MODE_FW) ? 1 : 0); + gpio_set_value(phy->gpio_en, (mode != NXP_NCI_MODE_COLD) ? 1 : 0); + usleep_range(10000, 15000); + + if (mode == NXP_NCI_MODE_COLD) + phy->hard_fault = 0; + + return 0; +} + +static int nxp_nci_i2c_write(void *phy_id, struct sk_buff *skb) +{ + int r; + struct nxp_nci_i2c_phy *phy = phy_id; + struct i2c_client *client = phy->i2c_dev; + + if (phy->hard_fault != 0) + return phy->hard_fault; + + r = i2c_master_send(client, skb->data, skb->len); + if (r == -EREMOTEIO) { + /* Retry, chip was in standby */ + usleep_range(110000, 120000); + r = i2c_master_send(client, skb->data, skb->len); + } + + if (r < 0) { + nfc_err(&client->dev, "Error %d on I2C send\n", r); + } else if (r != skb->len) { + nfc_err(&client->dev, + "Invalid length sent: %u (expected %u)\n", + r, skb->len); + r = -EREMOTEIO; + } else { + /* Success but return 0 and not number of bytes */ + r = 0; + } + + return r; +} + +static struct nxp_nci_phy_ops i2c_phy_ops = { + .set_mode = nxp_nci_i2c_set_mode, + .write = nxp_nci_i2c_write, +}; + +static int nxp_nci_i2c_fw_read(struct nxp_nci_i2c_phy *phy, + struct sk_buff **skb) +{ + struct i2c_client *client = phy->i2c_dev; + u16 header; + size_t frame_len; + int r; + + r = i2c_master_recv(client, (u8 *) &header, NXP_NCI_FW_HDR_LEN); + if (r < 0) { + goto fw_read_exit; + } else if (r != NXP_NCI_FW_HDR_LEN) { + nfc_err(&client->dev, "Incorrect header length: %u\n", r); + r = -EBADMSG; + goto fw_read_exit; + } + + frame_len = (get_unaligned_be16(&header) & NXP_NCI_FW_FRAME_LEN_MASK) + + NXP_NCI_FW_CRC_LEN; + + *skb = alloc_skb(NXP_NCI_FW_HDR_LEN + frame_len, GFP_KERNEL); + if (*skb == NULL) { + r = -ENOMEM; + goto fw_read_exit; + } + + memcpy(skb_put(*skb, NXP_NCI_FW_HDR_LEN), &header, NXP_NCI_FW_HDR_LEN); + + r = i2c_master_recv(client, skb_put(*skb, frame_len), frame_len); + if (r != frame_len) { + nfc_err(&client->dev, + "Invalid frame length: %u (expected %zu)\n", + r, frame_len); + r = -EBADMSG; + goto fw_read_exit_free_skb; + } + + return 0; + +fw_read_exit_free_skb: + kfree_skb(*skb); +fw_read_exit: + return r; +} + +static int nxp_nci_i2c_nci_read(struct nxp_nci_i2c_phy *phy, + struct sk_buff **skb) +{ + struct nci_ctrl_hdr header; /* May actually be a data header */ + struct i2c_client *client = phy->i2c_dev; + int r; + + r = i2c_master_recv(client, (u8 *) &header, NCI_CTRL_HDR_SIZE); + if (r < 0) { + goto nci_read_exit; + } else if (r != NCI_CTRL_HDR_SIZE) { + nfc_err(&client->dev, "Incorrect header length: %u\n", r); + r = -EBADMSG; + goto nci_read_exit; + } + + *skb = alloc_skb(NCI_CTRL_HDR_SIZE + header.plen, GFP_KERNEL); + if (*skb == NULL) { + r = -ENOMEM; + goto nci_read_exit; + } + + memcpy(skb_put(*skb, NCI_CTRL_HDR_SIZE), (void *) &header, + NCI_CTRL_HDR_SIZE); + + r = i2c_master_recv(client, skb_put(*skb, header.plen), header.plen); + if (r != header.plen) { + nfc_err(&client->dev, + "Invalid frame payload length: %u (expected %u)\n", + r, header.plen); + r = -EBADMSG; + goto nci_read_exit_free_skb; + } + + return 0; + +nci_read_exit_free_skb: + kfree_skb(*skb); +nci_read_exit: + return r; +} + +static irqreturn_t nxp |