diff options
Diffstat (limited to 'drivers/nfc/s3fwrn5')
| -rw-r--r-- | drivers/nfc/s3fwrn5/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/Makefile | 11 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/core.c | 219 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/firmware.c | 511 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/firmware.h | 111 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/i2c.c | 306 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/nci.c | 165 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/nci.h | 89 | ||||
| -rw-r--r-- | drivers/nfc/s3fwrn5/s3fwrn5.h | 99 |
9 files changed, 1530 insertions, 0 deletions
diff --git a/drivers/nfc/s3fwrn5/Kconfig b/drivers/nfc/s3fwrn5/Kconfig new file mode 100644 index 000000000000..7e3b255b3f99 --- /dev/null +++ b/drivers/nfc/s3fwrn5/Kconfig @@ -0,0 +1,19 @@ +config NFC_S3FWRN5 + tristate + ---help--- + Core driver for Samsung S3FWRN5 NFC chip. Contains core utilities + of chip. It's intended to be used by PHYs to avoid duplicating lots + of common code. + +config NFC_S3FWRN5_I2C + tristate "Samsung S3FWRN5 I2C support" + depends on NFC_NCI && I2C + select NFC_S3FWRN5 + default n + ---help--- + This module adds support for an I2C interface to the S3FWRN5 chip. + 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 s3fwrn5_i2c.ko. + Say N if unsure. diff --git a/drivers/nfc/s3fwrn5/Makefile b/drivers/nfc/s3fwrn5/Makefile new file mode 100644 index 000000000000..3381c34faf62 --- /dev/null +++ b/drivers/nfc/s3fwrn5/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for Samsung S3FWRN5 NFC driver +# + +s3fwrn5-objs = core.o firmware.o nci.o +s3fwrn5_i2c-objs = i2c.o + +obj-$(CONFIG_NFC_S3FWRN5) += s3fwrn5.o +obj-$(CONFIG_NFC_S3FWRN5_I2C) += s3fwrn5_i2c.o + +ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG diff --git a/drivers/nfc/s3fwrn5/core.c b/drivers/nfc/s3fwrn5/core.c new file mode 100644 index 000000000000..0d866ca295e3 --- /dev/null +++ b/drivers/nfc/s3fwrn5/core.c @@ -0,0 +1,219 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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/module.h> +#include <net/nfc/nci_core.h> + +#include "s3fwrn5.h" +#include "firmware.h" +#include "nci.h" + +#define S3FWRN5_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_ISO15693_MASK) + +static int s3fwrn5_firmware_update(struct s3fwrn5_info *info) +{ + bool need_update; + int ret; + + s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin"); + + /* Update firmware */ + + s3fwrn5_set_wake(info, false); + s3fwrn5_set_mode(info, S3FWRN5_MODE_FW); + + ret = s3fwrn5_fw_setup(&info->fw_info); + if (ret < 0) + return ret; + + need_update = s3fwrn5_fw_check_version(&info->fw_info, + info->ndev->manufact_specific_info); + if (!need_update) + goto out; + + dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n"); + + ret = s3fwrn5_fw_download(&info->fw_info); + if (ret < 0) + goto out; + + /* Update RF configuration */ + + s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); + + s3fwrn5_set_wake(info, true); + ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin"); + s3fwrn5_set_wake(info, false); + +out: + s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); + s3fwrn5_fw_cleanup(&info->fw_info); + return ret; +} + +static int s3fwrn5_nci_open(struct nci_dev *ndev) +{ + struct s3fwrn5_info *info = nci_get_drvdata(ndev); + + if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD) + return -EBUSY; + + s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); + s3fwrn5_set_wake(info, true); + + return 0; +} + +static int s3fwrn5_nci_close(struct nci_dev *ndev) +{ + struct s3fwrn5_info *info = nci_get_drvdata(ndev); + + s3fwrn5_set_wake(info, false); + s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); + + return 0; +} + +static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct s3fwrn5_info *info = nci_get_drvdata(ndev); + int ret; + + mutex_lock(&info->mutex); + + if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) { + mutex_unlock(&info->mutex); + return -EINVAL; + } + + ret = s3fwrn5_write(info, skb); + if (ret < 0) + kfree_skb(skb); + + mutex_unlock(&info->mutex); + return ret; +} + +static int s3fwrn5_nci_post_setup(struct nci_dev *ndev) +{ + struct s3fwrn5_info *info = nci_get_drvdata(ndev); + int ret; + + ret = s3fwrn5_firmware_update(info); + if (ret < 0) + goto out; + + /* NCI core reset */ + + s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI); + s3fwrn5_set_wake(info, true); + + ret = nci_core_reset(info->ndev); + if (ret < 0) + goto out; + + ret = nci_core_init(info->ndev); + +out: + return ret; +} + +static struct nci_ops s3fwrn5_nci_ops = { + .open = s3fwrn5_nci_open, + .close = s3fwrn5_nci_close, + .send = s3fwrn5_nci_send, + .post_setup = s3fwrn5_nci_post_setup, +}; + +int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, + struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload) +{ + struct s3fwrn5_info *info; + int ret; + + info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->phy_id = phy_id; + info->pdev = pdev; + info->phy_ops = phy_ops; + info->max_payload = max_payload; + mutex_init(&info->mutex); + + s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); + + s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops, + &s3fwrn5_nci_ops.n_prop_ops); + + info->ndev = nci_allocate_device(&s3fwrn5_nci_ops, + S3FWRN5_NFC_PROTOCOLS, 0, 0); + if (!info->ndev) + return -ENOMEM; + + nci_set_parent_dev(info->ndev, pdev); + nci_set_drvdata(info->ndev, info); + + ret = nci_register_device(info->ndev); + if (ret < 0) { + nci_free_device(info->ndev); + return ret; + } + + info->fw_info.ndev = info->ndev; + + *ndev = info->ndev; + + return ret; +} +EXPORT_SYMBOL(s3fwrn5_probe); + +void s3fwrn5_remove(struct nci_dev *ndev) +{ + struct s3fwrn5_info *info = nci_get_drvdata(ndev); + + s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD); + + nci_unregister_device(ndev); + nci_free_device(ndev); +} +EXPORT_SYMBOL(s3fwrn5_remove); + +int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb, + enum s3fwrn5_mode mode) +{ + switch (mode) { + case S3FWRN5_MODE_NCI: + return nci_recv_frame(ndev, skb); + case S3FWRN5_MODE_FW: + return s3fwrn5_fw_recv_frame(ndev, skb); + default: + return -ENODEV; + } +} +EXPORT_SYMBOL(s3fwrn5_recv_frame); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver"); +MODULE_AUTHOR("Robert Baldyga <[email protected]>"); diff --git a/drivers/nfc/s3fwrn5/firmware.c b/drivers/nfc/s3fwrn5/firmware.c new file mode 100644 index 000000000000..64a90252c57f --- /dev/null +++ b/drivers/nfc/s3fwrn5/firmware.c @@ -0,0 +1,511 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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/crypto.h> +#include <crypto/sha.h> + +#include "s3fwrn5.h" +#include "firmware.h" + +struct s3fwrn5_fw_version { + __u8 major; + __u8 build1; + __u8 build2; + __u8 target; +}; + +static int s3fwrn5_fw_send_msg(struct s3fwrn5_fw_info *fw_info, + struct sk_buff *msg, struct sk_buff **rsp) +{ + struct s3fwrn5_info *info = + container_of(fw_info, struct s3fwrn5_info, fw_info); + long ret; + + reinit_completion(&fw_info->completion); + + ret = s3fwrn5_write(info, msg); + if (ret < 0) + return ret; + + ret = wait_for_completion_interruptible_timeout( + &fw_info->completion, msecs_to_jiffies(1000)); + if (ret < 0) + return ret; + else if (ret == 0) + return -ENXIO; + + if (!fw_info->rsp) + return -EINVAL; + + *rsp = fw_info->rsp; + fw_info->rsp = NULL; + + return 0; +} + +static int s3fwrn5_fw_prep_msg(struct s3fwrn5_fw_info *fw_info, + struct sk_buff **msg, u8 type, u8 code, const void *data, u16 len) +{ + struct s3fwrn5_fw_header hdr; + struct sk_buff *skb; + + hdr.type = type | fw_info->parity; + fw_info->parity ^= 0x80; + hdr.code = code; + hdr.len = len; + + skb = alloc_skb(S3FWRN5_FW_HDR_SIZE + len, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + memcpy(skb_put(skb, S3FWRN5_FW_HDR_SIZE), &hdr, S3FWRN5_FW_HDR_SIZE); + if (len) + memcpy(skb_put(skb, len), data, len); + + *msg = skb; + + return 0; +} + +static int s3fwrn5_fw_get_bootinfo(struct s3fwrn5_fw_info *fw_info, + struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo) +{ + struct sk_buff *msg, *rsp = NULL; + struct s3fwrn5_fw_header *hdr; + int ret; + + /* Send GET_BOOTINFO command */ + + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, + S3FWRN5_FW_CMD_GET_BOOTINFO, NULL, 0); + if (ret < 0) + return ret; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + return ret; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { + ret = -EINVAL; + goto out; + } + + memcpy(bootinfo, rsp->data + S3FWRN5_FW_HDR_SIZE, 10); + +out: + kfree_skb(rsp); + return ret; +} + +static int s3fwrn5_fw_enter_update_mode(struct s3fwrn5_fw_info *fw_info, + const void *hash_data, u16 hash_size, + const void *sig_data, u16 sig_size) +{ + struct s3fwrn5_fw_cmd_enter_updatemode args; + struct sk_buff *msg, *rsp = NULL; + struct s3fwrn5_fw_header *hdr; + int ret; + + /* Send ENTER_UPDATE_MODE command */ + + args.hashcode_size = hash_size; + args.signature_size = sig_size; + + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, + S3FWRN5_FW_CMD_ENTER_UPDATE_MODE, &args, sizeof(args)); + if (ret < 0) + return ret; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + return ret; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { + ret = -EPROTO; + goto out; + } + + kfree_skb(rsp); + + /* Send hashcode data */ + + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_DATA, 0, + hash_data, hash_size); + if (ret < 0) + return ret; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + return ret; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { + ret = -EPROTO; + goto out; + } + + kfree_skb(rsp); + + /* Send signature data */ + + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_DATA, 0, + sig_data, sig_size); + if (ret < 0) + return ret; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + return ret; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) + ret = -EPROTO; + +out: + kfree_skb(rsp); + return ret; +} + +static int s3fwrn5_fw_update_sector(struct s3fwrn5_fw_info *fw_info, + u32 base_addr, const void *data) +{ + struct s3fwrn5_fw_cmd_update_sector args; + struct sk_buff *msg, *rsp = NULL; + struct s3fwrn5_fw_header *hdr; + int ret, i; + + /* Send UPDATE_SECTOR command */ + + args.base_address = base_addr; + + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, + S3FWRN5_FW_CMD_UPDATE_SECTOR, &args, sizeof(args)); + if (ret < 0) + return ret; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + return ret; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { + ret = -EPROTO; + goto err; + } + + kfree_skb(rsp); + + /* Send data split into 256-byte packets */ + + for (i = 0; i < 16; ++i) { + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, + S3FWRN5_FW_MSG_DATA, 0, data+256*i, 256); + if (ret < 0) + break; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + break; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { + ret = -EPROTO; + goto err; + } + + kfree_skb(rsp); + } + + return ret; + +err: + kfree_skb(rsp); + return ret; +} + +static int s3fwrn5_fw_complete_update_mode(struct s3fwrn5_fw_info *fw_info) +{ + struct sk_buff *msg, *rsp = NULL; + struct s3fwrn5_fw_header *hdr; + int ret; + + /* Send COMPLETE_UPDATE_MODE command */ + + ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, + S3FWRN5_FW_CMD_COMPLETE_UPDATE_MODE, NULL, 0); + if (ret < 0) + return ret; + + ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); + kfree_skb(msg); + if (ret < 0) + return ret; + + hdr = (struct s3fwrn5_fw_header *) rsp->data; + if (hdr->code != S3FWRN5_FW_RET_SUCCESS) + ret = -EPROTO; + + kfree_skb(rsp); + + return ret; +} + +/* + * Firmware header stucture: + * + * 0x00 - 0x0B : Date and time string (w/o NUL termination) + * 0x10 - 0x13 : Firmware version + * 0x14 - 0x17 : Signature address + * 0x18 - 0x1B : Signature size + * 0x1C - 0x1F : Firmware image address + * 0x20 - 0x23 : Firmware sectors count + * 0x24 - 0x27 : Custom signature address + * 0x28 - 0x2B : Custom signature size + */ + +#define S3FWRN5_FW_IMAGE_HEADER_SIZE 44 + +static int s3fwrn5_fw_request_firmware(struct s3fwrn5_fw_info *fw_info) +{ + struct s3fwrn5_fw_image *fw = &fw_info->fw; + u32 sig_off; + u32 image_off; + u32 custom_sig_off; + int ret; + + ret = request_firmware(&fw->fw, fw_info->fw_name, + &fw_info->ndev->nfc_dev->dev); + if (ret < 0) + return ret; + + if (fw->fw->size < S3FWRN5_FW_IMAGE_HEADER_SIZE) + return -EINVAL; + + memcpy(fw->date, fw->fw->data + 0x00, 12); + fw->date[12] = '\0'; + + memcpy(&fw->version, fw->fw->data + 0x10, 4); + + memcpy(&sig_off, fw->fw->data + 0x14, 4); + fw->sig = fw->fw->data + sig_off; + memcpy(&fw->sig_size, fw->fw->data + 0x18, 4); + + memcpy(&image_off, fw->fw->data + 0x1C, 4); + fw->image = fw->fw->data + image_off; + memcpy(&fw->image_sectors, fw->fw->data + 0x20, 4); + + memcpy(&custom_sig_off, fw->fw->data + 0x24, 4); + fw->custom_sig = fw->fw->data + custom_sig_off; + memcpy(&fw->custom_sig_size, fw->fw->data + 0x28, 4); + + return 0; +} + +static void s3fwrn5_fw_release_firmware(struct s3fwrn5_fw_info *fw_info) +{ + release_firmware(fw_info->fw.fw); +} + +static int s3fwrn5_fw_get_base_addr( + struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo, u32 *base_addr) +{ + int i; + struct { + u8 version[4]; + u32 base_addr; + } match[] = { + {{0x05, 0x00, 0x00, 0x00}, 0x00005000}, + {{0x05, 0x00, 0x00, 0x01}, 0x00003000}, + {{0x05, 0x00, 0x00, 0x02}, 0x00003000}, + {{0x05, 0x00, 0x00, 0x03}, 0x00003000}, + {{0x05, 0x00, 0x00, 0x05}, 0x00003000} + }; + + for (i = 0; i < ARRAY_SIZE(match); ++i) + if (bootinfo->hw_version[0] == match[i].version[0] && + bootinfo->hw_version[1] == match[i].version[1] && + bootinfo->hw_version[3] == match[i].version[3]) { + *base_addr = match[i].base_addr; + return 0; + } + + return -EINVAL; +} + +static inline bool +s3fwrn5_fw_is_custom(struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo) +{ + return !!bootinfo->hw_version[2]; +} + +int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info) +{ + struct s3fwrn5_fw_cmd_get_bootinfo_rsp bootinfo; + int ret; + + /* Get firmware data */ + + ret = s3fwrn5_fw_request_firmware(fw_info); + if (ret < 0) { + dev_err(&fw_info->ndev->nfc_dev->dev, + "Failed to get fw file, ret=%02x\n", ret); + return ret; + } + + /* Get bootloader info */ + + ret = s3fwrn5_fw_get_bootinfo(fw_info, &bootinfo); + if (ret < 0) { + dev_err(&fw_info->ndev->nfc_dev->dev, + "Failed to get bootinfo, ret=%02x\n", ret); + goto err; + } + + /* Match hardware version to obtain firmware base address */ + + ret = s3fwrn5_fw_get_base_addr(&bootinfo, &fw_info->base_addr); + if (ret < 0) { + dev_err(&fw_info->ndev->nfc_dev->dev, + "Unknown hardware version\n"); + goto err; + } + + fw_info->sector_size = bootinfo.sector_size; + + fw_info->sig_size = s3fwrn5_fw_is_custom(&bootinfo) ? + fw_info->fw.custom_sig_size : fw_info->fw.sig_size; + fw_info->sig = s3fwrn5_fw_is_custom(&bootinfo) ? + fw_info->fw.custom_sig : fw_info->fw.sig; + + return 0; + +err: + s3fwrn5_fw_release_firmware(fw_info); + return ret; +} + +bool s3fwrn5_fw_check_version(struct s3fwrn5_fw_info *fw_info, u32 version) +{ + struct s3fwrn5_fw_version *new = (void *) &fw_info->fw.version; + struct s3fwrn5_fw_version *old = (void *) &version; + + if (new->major > old->major) + return true; + if (new->build1 > old->build1) + return true; + if (new->build2 > old->build2) + return true; + + return false; +} + +int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info) +{ + struct s3fwrn5_fw_image *fw = &fw_info->fw; + u8 hash_data[SHA1_DIGEST_SIZE]; + struct scatterlist sg; + struct hash_desc desc; + u32 image_size, off; + int ret; + + image_size = fw_info->sector_size * fw->image_sectors; + + /* Compute SHA of firmware data */ + + sg_init_one(&sg, fw->image, image_size); + desc.tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC); + crypto_hash_init(&desc); + crypto_hash_update(&desc, &sg, image_size); + crypto_hash_final(&desc, hash_data); + crypto_free_hash(desc.tfm); + + /* Firmware update process */ + + dev_info(&fw_info->ndev->nfc_dev->dev, + "Firmware update: %s\n", fw_info->fw_name); + + ret = s3fwrn5_fw_enter_update_mode(fw_info, hash_data, + SHA1_DIGEST_SIZE, fw_info->sig, fw_info->sig_size); + if (ret < 0) { + dev_err(&fw_info->ndev->nfc_dev->dev, + "Unable to enter update mode\n"); + goto out; + } + + for (off = 0; off < image_size; off += fw_info->sector_size) { + ret = s3fwrn5_fw_update_sector(fw_info, + fw_info->base_addr + off, fw->image + off); + if (ret < 0) { + dev_err(&fw_info->ndev->nfc_dev->dev, + "Firmware update error (code=%d)\n", ret); + goto out; + } + } + + ret = s3fwrn5_fw_complete_update_mode(fw_info); + if (ret < 0) { + dev_err(&fw_info->ndev->nfc_dev->dev, + "Unable to complete update mode\n"); + goto out; + } + + dev_info(&fw_info->ndev->nfc_dev->dev, + "Firmware update: success\n"); + +out: + return ret; +} + +void s3fwrn5_fw_init(struct s3fwrn5_fw_info *fw_info, const char *fw_name) +{ + fw_info->parity = 0x00; + fw_info->rsp = NULL; + fw_info->fw.fw = NULL; + strcpy(fw_info->fw_name, fw_name); + init_completion(&fw_info->completion); +} + +void s3fwrn5_fw_cleanup(struct s3fwrn5_fw_info *fw_info) +{ + s3fwrn5_fw_release_firmware(fw_info); +} + +int s3fwrn5_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct s3fwrn5_info *info = nci_get_drvdata(ndev); + struct s3fwrn5_fw_info *fw_info = &info->fw_info; + + BUG_ON(fw_info->rsp); + + fw_info->rsp = skb; + + complete(&fw_info->completion); + + return 0; +} diff --git a/drivers/nfc/s3fwrn5/firmware.h b/drivers/nfc/s3fwrn5/firmware.h new file mode 100644 index 000000000000..1ec0647ab917 --- /dev/null +++ b/drivers/nfc/s3fwrn5/firmware.h @@ -0,0 +1,111 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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/>. + */ + +#ifndef __LOCAL_S3FWRN5_FIRMWARE_H_ +#define __LOCAL_S3FWRN5_FIRMWARE_H_ + +/* FW Message Types */ +#define S3FWRN5_FW_MSG_CMD 0x00 +#define S3FWRN5_FW_MSG_RSP 0x01 +#define S3FWRN5_FW_MSG_DATA 0x02 + +/* FW Return Codes */ +#define S3FWRN5_FW_RET_SUCCESS 0x00 +#define S3FWRN5_FW_RET_MESSAGE_TYPE_INVALID 0x01 +#define S3FWRN5_FW_RET_COMMAND_INVALID 0x02 +#define S3FWRN5_FW_RET_PAGE_DATA_OVERFLOW 0x03 +#define S3FWRN5_FW_RET_SECT_DATA_OVERFLOW 0x04 +#define S3FWRN5_FW_RET_AUTHENTICATION_FAIL 0x05 +#define S3FWRN5_FW_RET_FLASH_OPERATION_FAIL 0x06 +#define S3FWRN5_FW_RET_ADDRESS_OUT_OF_RANGE 0x07 +#define S3FWRN5_FW_RET_PARAMETER_INVALID 0x08 + +/* ---- FW Packet structures ---- */ +#define S3FWRN5_FW_HDR_SIZE 4 + +struct s3fwrn5_fw_header { + __u8 type; + __u8 code; + __u16 len; +}; + +#define S3FWRN5_FW_CMD_RESET 0x00 + +#define S3FWRN5_FW_CMD_GET_BOOTINFO 0x01 + +struct s3fwrn5_fw_cmd_get_bootinfo_rsp { + __u8 hw_version[4]; + __u16 sector_size; + __u16 page_size; + __u16 frame_max_size; + __u16 hw_buffer_size; +}; + +#define S3FWRN5_FW_CMD_ENTER_UPDATE_MODE 0x02 + +struct s3fwrn5_fw_cmd_enter_updatemode { + __u16 hashcode_size; + __u16 signature_size; +}; + +#define S3FWRN5_FW_CMD_UPDATE_SECTOR 0x04 + +struct s3fwrn5_fw_cmd_update_sector { + __u32 base_address; +}; + +#define S3FWRN5_FW_CMD_COMPLETE_UPDATE_MODE 0x05 + +struct s3fwrn5_fw_image { + const struct firmware *fw; + + char date[13]; + u32 version; + const void *sig; + u32 sig_size; + const void *image; + u32 image_sectors; + const void *custom_sig; + u32 custom_sig_size; +}; + +struct s3fwrn5_fw_info { + struct nci_dev *ndev; + struct s3fwrn5_fw_image fw; + char fw_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; + + const void *sig; + u32 sig_size; + u32 sector_size; + u32 base_addr; + + struct completion completion; + struct sk_buff *rsp; + char parity; +}; + +void s3fwrn5_fw_init(struct s3fwrn5_fw_info *fw_info, const char *fw_name); +int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info); +bool s3fwrn5_fw_check_version(struct s3fwrn5_fw_info *fw_info, u32 version); +int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info); +void s3fwrn5_fw_cleanup(struct s3fwrn5_fw_info *fw_info); + +int s3fwrn5_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb); + +#endif /* __LOCAL_S3FWRN5_FIRMWARE_H_ */ diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c new file mode 100644 index 000000000000..b4dd7dd47473 --- /dev/null +++ b/drivers/nfc/s3fwrn5/i2c.c @@ -0,0 +1,306 @@ +/* + * I2C Link Layer for Samsung S3FWRN5 NCI based Driver + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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/i2c.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/of_gpio.h> +#include <linux/of_irq.h> +#include <linux/module.h> + +#include <net/nfc/nfc.h> + +#include "s3fwrn5.h" + +#define S3FWRN5_I2C_DRIVER_NAME "s3fwrn5_i2c" + +#define S3FWRN5_I2C_MAX_PAYLOAD 32 +#define S3FWRN5_EN_WAIT_TIME 150 + +struct s3fwrn5_i2c_phy { + struct i2c_client *i2c_dev; + struct nci_dev *ndev; + + unsigned int gpio_en; + unsigned int gpio_fw_wake; + + struct mutex mutex; + + enum s3fwrn5_mode mode; + unsigned int irq_skip:1; +}; + +static void s3fwrn5_i2c_set_wake(void *phy_id, bool wake) +{ + struct s3fwrn5_i2c_phy *phy = phy_id; + + mutex_lock(&phy->mutex); + gpio_set_value(phy->gpio_fw_wake, wake); + msleep(S3FWRN5_EN_WAIT_TIME/2); + mutex_unlock(&phy->mutex); +} + +static void s3fwrn5_i2c_set_mode(void *phy_id, enum s3fwrn5_mode mode) +{ + struct s3fwrn5_i2c_phy *phy = phy_id; + + mutex_lock(&phy->mutex); + + if (phy->mode == mode) + goto out; + + phy->mode = mode; + + gpio_set_value(phy->gpio_en, 1); + gpio_set_value(phy->gpio_fw_wake, 0); + if (mode == S3FWRN5_MODE_FW) + gpio_set_value(phy->gpio_fw_wake, 1); + + if (mode != S3FWRN5_MODE_COLD) { + msleep(S3FWRN5_EN_WAIT_TIME); + gpio_set_value(phy->gpio_en, 0); + msleep(S3FWRN5_EN_WAIT_TIME/2); + } + + phy->irq_skip = true; + +out: + mutex_unlock(&phy->mutex); +} + +static enum s3fwrn5_mode s3fwrn5_i2c_get_mode(void *phy_id) +{ + struct s3fwrn5_i2c_phy *phy = phy_id; + enum s3fwrn5_mode mode; + + mutex_lock(&phy->mutex); + + mode = phy->mode; + + mutex_unlock(&phy->mutex); + + return mode; +} + +static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb) +{ + struct s3fwrn5_i2c_phy *phy = phy_id; + int ret; + + mutex_lock(&phy->mutex); + + phy->irq_skip = false; + + ret = i2c_master_send(phy->i2c_dev, skb->data, skb->len); + if (ret == -EREMOTEIO) { + /* Retry, chip was in standby */ + usleep_range(110000, 120000); + ret = i2c_master_send(phy->i2c_dev, skb->data, skb->len); + } + + mutex_unlock(&phy->mutex); + + if (ret < 0) + return ret; + + if (ret != skb->len) + return -EREMOTEIO; + + return 0; +} + +static struct s3fwrn5_phy_ops i2c_phy_ops = { + .set_wake = s3fwrn5_i2c_set_wake, + .set_mode = s3fwrn5_i2c_set_mode, + .get_mode = s3fwrn5_i2c_get_mode, + .write = s3fwrn5_i2c_write, +}; + +static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy) +{ + struct sk_buff *skb; + size_t hdr_size; + size_t data_len; + char hdr[4]; + int ret; + + hdr_size = (phy->mode == S3FWRN5_MODE_NCI) ? + NCI_CTRL_HDR_SIZE : S3FWRN5_FW_HDR_SIZE; + ret = i2c_master_recv(phy->i2c_dev, hdr, hdr_size); + if (ret < 0) + return ret; + + if (ret < hdr_size) + return -EBADMSG; + + data_len = (phy->mode == S3FWRN5_MODE_NCI) ? + ((struct nci_ctrl_hdr *)hdr)->plen : + ((struct s3fwrn5_fw_header *)hdr)->len; + + skb = alloc_skb(hdr_size + data_len, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + memcpy(skb_put(skb, hdr_size), hdr, hdr_size); + + if (data_len == 0) + goto out; + + ret = i2c_master_recv(phy->i2c_dev, skb_put(skb, data_len), data_len); + if (ret != data_len) { + kfree_skb(skb); + return -EBADMSG; + } + +out: + return s3fwrn5_recv_frame(phy->ndev, skb, phy->mode); +} + +static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id) +{ + struct s3fwrn5_i2c_phy *phy = phy_id; + int ret = 0; + + if (!phy || !phy->ndev) { + WARN_ON_ONCE(1); + return IRQ_NONE; + } + + mutex_lock(&phy->mutex); + + if (phy->irq_skip) + goto out; + + switch (phy->mode) { + case S3FWRN5_MODE_NCI: + case S3FWRN5_MODE_FW: + ret = s3fwrn5_i2c_read(phy); + break; + case S3FWRN5_MODE_COLD: + ret = -EREMOTEIO; + break; + } + +out: + mutex_unlock(&phy->mutex); + + return IRQ_HANDLED; +} + +static int s3fwrn5_i2c_parse_dt(struct i2c_client *client) +{ + struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client); + struct device_node *np = client->dev.of_node; + + if (!np) + return -ENODEV; + + phy->gpio_en = of_get_named_gpio(np, "s3fwrn5,en-gpios", 0); + if (!gpio_is_valid(phy->gpio_en)) + return -ENODEV; + + phy->gpio_fw_wake = of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0); + if (!gpio_is_valid(phy->gpio_fw_wake)) + return -ENODEV; + + return 0; +} + +static int s3fwrn5_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct s3fwrn5_i2c_phy *phy; + int ret; + + phy = devm_kzalloc(&client->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + mutex_init(&phy->mutex); + phy->mode = S3FWRN5_MODE_COLD; + phy->irq_skip = true; + + phy->i2c_dev = client; + i2c_set_clientdata(client, phy); + + ret = s3fwrn5_i2c_parse_dt(client); + if (ret < 0) + return ret; + + ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_en, + GPIOF_OUT_INIT_HIGH, "s3fwrn5_en"); + if (ret < 0) + return ret; + + ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_fw_wake, + GPIOF_OUT_INIT_LOW, "s3fwrn5_fw_wake"); + if (ret < 0) + return ret; + + ret = s3fwrn5_probe(&phy->ndev, phy, &phy->i2c_dev->dev, &i2c_phy_ops, + S3FWRN5_I2C_MAX_PAYLOAD); + if (ret < 0) + return ret; + + ret = request_threaded_irq(phy->i2c_dev->irq, NULL, + s3fwrn5_i2c_irq_thread_fn, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + S3FWRN5_I2C_DRIVER_NAME, phy); + if (ret) + s3fwrn5_remove(phy->ndev); + + return ret; +} + +static int s3fwrn5_i2c_remove(struct i2c_client *client) +{ + struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client); + + s3fwrn5_remove(phy->ndev); + + return 0; +} + +static struct i2c_device_id s3fwrn5_i2c_id_table[] = { + {S3FWRN5_I2C_DRIVER_NAME, 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, s3fwrn5_i2c_id_table); + +static const struct of_device_id of_s3fwrn5_i2c_match[] = { + { .compatible = "samsung,s3fwrn5-i2c", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_s3fwrn5_i2c_match); + +static struct i2c_driver s3fwrn5_i2c_driver = { + .driver = { + .owner = THIS_MODULE, + .name = S3FWRN5_I2C_DRIVER_NAME, + .of_match_table = of_match_ptr(of_s3fwrn5_i2c_match), + }, + .probe = s3fwrn5_i2c_probe, + .remove = s3fwrn5_i2c_remove, + .id_table = s3fwrn5_i2c_id_table, +}; + +module_i2c_driver(s3fwrn5_i2c_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("I2C driver for Samsung S3FWRN5"); +MODULE_AUTHOR("Robert Baldyga <[email protected]>"); diff --git a/drivers/nfc/s3fwrn5/nci.c b/drivers/nfc/s3fwrn5/nci.c new file mode 100644 index 000000000000..ace0071c5339 --- /dev/null +++ b/drivers/nfc/s3fwrn5/nci.c @@ -0,0 +1,165 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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 "s3fwrn5.h" +#include "nci.h" + +static int s3fwrn5_nci_prop_rsp(struct nci_dev *ndev, struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + nci_req_complete(ndev, status); + return 0; +} + +static struct nci_prop_ops s3fwrn5_nci_prop_ops[] = { + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_AGAIN), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_GET_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_SET_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_GET_RFREG_VER), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_SET_RFREG_VER), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_START_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_STOP_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_FW_CFG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_WR_RESET), + .rsp = s3fwrn5_nci_prop_rsp, + }, +}; + +void s3fwrn5_nci_get_prop_ops(struct nci_prop_ops **ops, size_t *n) +{ + *ops = s3fwrn5_nci_prop_ops; + *n = ARRAY_SIZE(s3fwrn5_nci_prop_ops); +} + +#define S3FWRN5_RFREG_SECTION_SIZE 252 + +int s3fwrn5_nci_rf_configure(struct s3fwrn5_info *info, const char *fw_name) +{ + const struct firmware *fw; + struct nci_prop_fw_cfg_cmd fw_cfg; + struct nci_prop_set_rfreg_cmd set_rfreg; + struct nci_prop_stop_rfreg_cmd stop_rfreg; + u32 checksum; + int i, len; + int ret; + + ret = request_firmware(&fw, fw_name, &info->ndev->nfc_dev->dev); + if (ret < 0) + return ret; + + /* Compute rfreg checksum */ + + checksum = 0; + for (i = 0; i < fw->size; i += 4) + checksum += *((u32 *)(fw->data+i)); + + /* Set default clock configuration for external crystal */ + + fw_cfg.clk_type = 0x01; + fw_cfg.clk_speed = 0xff; + fw_cfg.clk_req = 0xff; + ret = nci_prop_cmd(info->ndev, NCI_PROP_FW_CFG, + sizeof(fw_cfg), (__u8 *)&fw_cfg); + if (ret < 0) + goto out; + + /* Start rfreg configuration */ + + dev_info(&info->ndev->nfc_dev->dev, + "rfreg configuration update: %s\n", fw_name); + + ret = nci_prop_cmd(info->ndev, NCI_PROP_START_RFREG, 0, NULL); + if (ret < 0) { + dev_err(&info->ndev->nfc_dev->dev, + "Unable to start rfreg update\n"); + goto out; + } + + /* Update rfreg */ + + set_rfreg.index = 0; + for (i = 0; i < fw->size; i += S3FWRN5_RFREG_SECTION_SIZE) { + len = (fw->size - i < S3FWRN5_RFREG_SECTION_SIZE) ? + (fw->size - i) : S3FWRN5_RFREG_SECTION_SIZE; + memcpy(set_rfreg.data, fw->data+i, len); + ret = nci_prop_cmd(info->ndev, NCI_PROP_SET_RFREG, + len+1, (__u8 *)&set_rfreg); + if (ret < 0) { + dev_err(&info->ndev->nfc_dev->dev, + "rfreg update error (code=%d)\n", ret); + goto out; + } + set_rfreg.index++; + } + + /* Finish rfreg configuration */ + + stop_rfreg.checksum = checksum & 0xffff; + ret = nci_prop_cmd(info->ndev, NCI_PROP_STOP_RFREG, + sizeof(stop_rfreg), (__u8 *)&stop_rfreg); + if (ret < 0) { + dev_err(&info->ndev->nfc_dev->dev, + "Unable to stop rfreg update\n"); + goto out; + } + + dev_info(&info->ndev->nfc_dev->dev, + "rfreg configuration update: success\n"); +out: + release_firmware(fw); + return ret; +} diff --git a/drivers/nfc/s3fwrn5/nci.h b/drivers/nfc/s3fwrn5/nci.h new file mode 100644 index 000000000000..0e68d439dde6 --- /dev/null +++ b/drivers/nfc/s3fwrn5/nci.h @@ -0,0 +1,89 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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/>. + */ + +#ifndef __LOCAL_S3FWRN5_NCI_H_ +#define __LOCAL_S3FWRN5_NCI_H_ + +#include "s3fwrn5.h" + +#define NCI_PROP_AGAIN 0x01 + +#define NCI_PROP_GET_RFREG 0x21 +#define NCI_PROP_SET_RFREG 0x22 + +struct nci_prop_set_rfreg_cmd { + __u8 index; + __u8 data[252]; +}; + +struct nci_prop_set_rfreg_rsp { + __u8 status; +}; + +#define NCI_PROP_GET_RFREG_VER 0x24 + +struct nci_prop_get_rfreg_ver_rsp { + __u8 status; + __u8 data[8]; +}; + +#define NCI_PROP_SET_RFREG_VER 0x25 + +struct nci_prop_set_rfreg_ver_cmd { + __u8 data[8]; +}; + +struct nci_prop_set_rfreg_ver_rsp { + __u8 status; +}; + +#define NCI_PROP_START_RFREG 0x26 + +struct nci_prop_start_rfreg_rsp { + __u8 status; +}; + +#define NCI_PROP_STOP_RFREG 0x27 + +struct nci_prop_stop_rfreg_cmd { + __u16 checksum; +}; + +struct nci_prop_stop_rfreg_rsp { + __u8 status; +}; + +#define NCI_PROP_FW_CFG 0x28 + +struct nci_prop_fw_cfg_cmd { + __u8 clk_type; + __u8 clk_speed; + __u8 clk_req; +}; + +struct nci_prop_fw_cfg_rsp { + __u8 status; +}; + +#define NCI_PROP_WR_RESET 0x2f + +void s3fwrn5_nci_get_prop_ops(struct nci_prop_ops **ops, size_t *n); +int s3fwrn5_nci_rf_configure(struct s3fwrn5_info *info, const char *fw_name); + +#endif /* __LOCAL_S3FWRN5_NCI_H_ */ diff --git a/drivers/nfc/s3fwrn5/s3fwrn5.h b/drivers/nfc/s3fwrn5/s3fwrn5.h new file mode 100644 index 000000000000..89210d4828b8 --- /dev/null +++ b/drivers/nfc/s3fwrn5/s3fwrn5.h @@ -0,0 +1,99 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <[email protected]> + * + * 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 or later, 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/>. + */ + +#ifndef __LOCAL_S3FWRN5_H_ +#define __LOCAL_S3FWRN5_H_ + +#include <linux/nfc.h> + +#include <net/nfc/nci_core.h> + +#include "firmware.h" + +enum s3fwrn5_mode { + S3FWRN5_MODE_COLD, + S3FWRN5_MODE_NCI, + S3FWRN5_MODE_FW, +}; + +struct s3fwrn5_phy_ops { + void (*set_wake)(void *id, bool sleep); + void (*set_mode)(void *id, enum s3fwrn5_mode); + enum s3fwrn5_mode (*get_mode)(void *id); + int (*write)(void *id, struct sk_buff *skb); +}; + +struct s3fwrn5_info { + struct nci_dev *ndev; + void *phy_id; + struct device *pdev; + + struct s3fwrn5_phy_ops *phy_ops; + unsigned int max_payload; + + struct s3fwrn5_fw_info fw_info; + + struct mutex mutex; +}; + +static inline int s3fwrn5_set_mode(struct s3fwrn5_info *info, + enum s3fwrn5_mode mode) +{ + if (!info->phy_ops->set_mode) + return -ENOTSUPP; + + info->phy_ops->set_mode(info->phy_id, mode); + + return 0; +} + +static inline enum s3fwrn5_mode s3fwrn5_get_mode(struct s3fwrn5_info *info) +{ + if (!info->phy_ops->get_mode) + return -ENOTSUPP; + + return info->phy_ops->get_mode(info->phy_id); +} + +static inline int s3fwrn5_set_wake(struct s3fwrn5_info *info, bool wake) +{ + if (!info->phy_ops->set_wake) + return -ENOTSUPP; + + info->phy_ops->set_wake(info->phy_id, wake); + + return 0; +} + +static inline int s3fwrn5_write(struct s3fwrn5_info *info, struct sk_buff *skb) +{ + if (!info->phy_ops->write) + return -ENOTSUPP; + + return info->phy_ops->write(info->phy_id, skb); +} + +int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev, + struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload); +void s3fwrn5_remove(struct nci_dev *ndev); + +int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb, + enum s3fwrn5_mode mode); + +#endif /* __LOCAL_S3FWRN5_H_ */ |