+++ /dev/null
-/*
- * Texas Instrument's NFC Driver For Shared Transport.
- *
- * NFC Driver acts as interface between NCI core and
- * TI Shared Transport Layer.
- *
- * Copyright (C) 2011 Texas Instruments, Inc.
- *
- * Written by Ilan Elias <ilane@ti.com>
- *
- * Acknowledgements:
- * This file is based on btwilink.c, which was written
- * by Raja Mani and Pavan Savoy.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms 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/platform_device.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/firmware.h>
-#include <linux/nfc.h>
-#include <net/nfc/nci.h>
-#include <net/nfc/nci_core.h>
-#include <linux/ti_wilink_st.h>
-
-#define NFCWILINK_CHNL 12
-#define NFCWILINK_OPCODE 7
-#define NFCWILINK_MAX_FRAME_SIZE 300
-#define NFCWILINK_HDR_LEN 4
-#define NFCWILINK_OFFSET_LEN_IN_HDR 1
-#define NFCWILINK_LEN_SIZE 2
-#define NFCWILINK_REGISTER_TIMEOUT 8000 /* 8 sec */
-#define NFCWILINK_CMD_TIMEOUT 5000 /* 5 sec */
-
-#define BTS_FILE_NAME_MAX_SIZE 40
-#define BTS_FILE_HDR_MAGIC 0x42535442
-#define BTS_FILE_CMD_MAX_LEN 0xff
-#define BTS_FILE_ACTION_TYPE_SEND_CMD 1
-
-#define NCI_VS_NFCC_INFO_CMD_GID 0x2f
-#define NCI_VS_NFCC_INFO_CMD_OID 0x12
-#define NCI_VS_NFCC_INFO_RSP_GID 0x4f
-#define NCI_VS_NFCC_INFO_RSP_OID 0x12
-
-struct nfcwilink_hdr {
- __u8 chnl;
- __u8 opcode;
- __le16 len;
-} __packed;
-
-struct nci_vs_nfcc_info_cmd {
- __u8 gid;
- __u8 oid;
- __u8 plen;
-} __packed;
-
-struct nci_vs_nfcc_info_rsp {
- __u8 gid;
- __u8 oid;
- __u8 plen;
- __u8 status;
- __u8 hw_id;
- __u8 sw_ver_x;
- __u8 sw_ver_z;
- __u8 patch_id;
-} __packed;
-
-struct bts_file_hdr {
- __le32 magic;
- __le32 ver;
- __u8 rfu[24];
- __u8 actions[0];
-} __packed;
-
-struct bts_file_action {
- __le16 type;
- __le16 len;
- __u8 data[0];
-} __packed;
-
-struct nfcwilink {
- struct platform_device *pdev;
- struct nci_dev *ndev;
- unsigned long flags;
-
- int st_register_cb_status;
- long (*st_write) (struct sk_buff *);
-
- struct completion completed;
-
- struct nci_vs_nfcc_info_rsp nfcc_info;
-};
-
-/* NFCWILINK driver flags */
-enum {
- NFCWILINK_RUNNING,
- NFCWILINK_FW_DOWNLOAD,
-};
-
-static int nfcwilink_send(struct nci_dev *ndev, struct sk_buff *skb);
-
-static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how)
-{
- struct sk_buff *skb;
-
- skb = alloc_skb(len + NFCWILINK_HDR_LEN, how);
- if (skb)
- skb_reserve(skb, NFCWILINK_HDR_LEN);
-
- return skb;
-}
-
-static void nfcwilink_fw_download_receive(struct nfcwilink *drv,
- struct sk_buff *skb)
-{
- struct nci_vs_nfcc_info_rsp *rsp = (void *)skb->data;
-
- /* Detect NCI_VS_NFCC_INFO_RSP and store the result */
- if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) &&
- (rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) {
- memcpy(&drv->nfcc_info, rsp,
- sizeof(struct nci_vs_nfcc_info_rsp));
- }
-
- kfree_skb(skb);
-
- complete(&drv->completed);
-}
-
-static int nfcwilink_get_bts_file_name(struct nfcwilink *drv, char *file_name)
-{
- struct nci_vs_nfcc_info_cmd *cmd;
- struct sk_buff *skb;
- unsigned long comp_ret;
- int rc;
-
- skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd),
- GFP_KERNEL);
- if (!skb) {
- nfc_err(&drv->pdev->dev,
- "no memory for nci_vs_nfcc_info_cmd\n");
- return -ENOMEM;
- }
-
- cmd = (struct nci_vs_nfcc_info_cmd *)
- skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd));
- cmd->gid = NCI_VS_NFCC_INFO_CMD_GID;
- cmd->oid = NCI_VS_NFCC_INFO_CMD_OID;
- cmd->plen = 0;
-
- drv->nfcc_info.plen = 0;
-
- rc = nfcwilink_send(drv->ndev, skb);
- if (rc)
- return rc;
-
- comp_ret = wait_for_completion_timeout(&drv->completed,
- msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
- dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld\n",
- comp_ret);
- if (comp_ret == 0) {
- nfc_err(&drv->pdev->dev,
- "timeout on wait_for_completion_timeout\n");
- return -ETIMEDOUT;
- }
-
- dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d\n",
- drv->nfcc_info.plen, drv->nfcc_info.status);
-
- if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) {
- nfc_err(&drv->pdev->dev, "invalid nci_vs_nfcc_info_rsp\n");
- return -EINVAL;
- }
-
- snprintf(file_name, BTS_FILE_NAME_MAX_SIZE,
- "TINfcInit_%d.%d.%d.%d.bts",
- drv->nfcc_info.hw_id,
- drv->nfcc_info.sw_ver_x,
- drv->nfcc_info.sw_ver_z,
- drv->nfcc_info.patch_id);
-
- nfc_info(&drv->pdev->dev, "nfcwilink FW file name: %s\n", file_name);
-
- return 0;
-}
-
-static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len)
-{
- struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data;
- struct sk_buff *skb;
- unsigned long comp_ret;
- int rc;
-
- /* verify valid cmd for the NFC channel */
- if ((len <= sizeof(struct nfcwilink_hdr)) ||
- (len > BTS_FILE_CMD_MAX_LEN) ||
- (hdr->chnl != NFCWILINK_CHNL) ||
- (hdr->opcode != NFCWILINK_OPCODE)) {
- nfc_err(&drv->pdev->dev,
- "ignoring invalid bts cmd, len %d, chnl %d, opcode %d\n",
- len, hdr->chnl, hdr->opcode);
- return 0;
- }
-
- /* remove the ST header */
- len -= sizeof(struct nfcwilink_hdr);
- data += sizeof(struct nfcwilink_hdr);
-
- skb = nfcwilink_skb_alloc(len, GFP_KERNEL);
- if (!skb) {
- nfc_err(&drv->pdev->dev, "no memory for bts cmd\n");
- return -ENOMEM;
- }
-
- memcpy(skb_put(skb, len), data, len);
-
- rc = nfcwilink_send(drv->ndev, skb);
- if (rc)
- return rc;
-
- comp_ret = wait_for_completion_timeout(&drv->completed,
- msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
- dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld\n",
- comp_ret);
- if (comp_ret == 0) {
- nfc_err(&drv->pdev->dev,
- "timeout on wait_for_completion_timeout\n");
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-static int nfcwilink_download_fw(struct nfcwilink *drv)
-{
- unsigned char file_name[BTS_FILE_NAME_MAX_SIZE];
- const struct firmware *fw;
- __u16 action_type, action_len;
- __u8 *ptr;
- int len, rc;
-
- set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
-
- rc = nfcwilink_get_bts_file_name(drv, file_name);
- if (rc)
- goto exit;
-
- rc = request_firmware(&fw, file_name, &drv->pdev->dev);
- if (rc) {
- nfc_err(&drv->pdev->dev, "request_firmware failed %d\n", rc);
-
- /* if the file is not found, don't exit with failure */
- if (rc == -ENOENT)
- rc = 0;
-
- goto exit;
- }
-
- len = fw->size;
- ptr = (__u8 *)fw->data;
-
- if ((len == 0) || (ptr == NULL)) {
- dev_dbg(&drv->pdev->dev,
- "request_firmware returned size %d\n", len);
- goto release_fw;
- }
-
- if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) !=
- BTS_FILE_HDR_MAGIC) {
- nfc_err(&drv->pdev->dev, "wrong bts magic number\n");
- rc = -EINVAL;
- goto release_fw;
- }
-
- /* remove the BTS header */
- len -= sizeof(struct bts_file_hdr);
- ptr += sizeof(struct bts_file_hdr);
-
- while (len > 0) {
- action_type =
- __le16_to_cpu(((struct bts_file_action *)ptr)->type);
- action_len =
- __le16_to_cpu(((struct bts_file_action *)ptr)->len);
-
- dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d\n",
- action_type, action_len);
-
- switch (action_type) {
- case BTS_FILE_ACTION_TYPE_SEND_CMD:
- rc = nfcwilink_send_bts_cmd(drv,
- ((struct bts_file_action *)ptr)->data,
- action_len);
- if (rc)
- goto release_fw;
- break;
- }
-
- /* advance to the next action */
- len -= (sizeof(struct bts_file_action) + action_len);
- ptr += (sizeof(struct bts_file_action) + action_len);
- }
-
-release_fw:
- release_firmware(fw);
-
-exit:
- clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
- return rc;
-}
-
-/* Called by ST when registration is complete */
-static void nfcwilink_register_complete(void *priv_data, int data)
-{
- struct nfcwilink *drv = priv_data;
-
- /* store ST registration status */
- drv->st_register_cb_status = data;
-
- /* complete the wait in nfc_st_open() */
- complete(&drv->completed);
-}
-
-/* Called by ST when receive data is available */
-static long nfcwilink_receive(void *priv_data, struct sk_buff *skb)
-{
- struct nfcwilink *drv = priv_data;
- int rc;
-
- if (!skb)
- return -EFAULT;
-
- if (!drv) {
- kfree_skb(skb);
- return -EFAULT;
- }
-
- dev_dbg(&drv->pdev->dev, "receive entry, len %d\n", skb->len);
-
- /* strip the ST header
- (apart for the chnl byte, which is not received in the hdr) */
- skb_pull(skb, (NFCWILINK_HDR_LEN-1));
-
- if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) {
- nfcwilink_fw_download_receive(drv, skb);
- return 0;
- }
-
- /* Forward skb to NCI core layer */
- rc = nci_recv_frame(drv->ndev, skb);
- if (rc < 0) {
- nfc_err(&drv->pdev->dev, "nci_recv_frame failed %d\n", rc);
- return rc;
- }
-
- return 0;
-}
-
-/* protocol structure registered with ST */
-static struct st_proto_s nfcwilink_proto = {
- .chnl_id = NFCWILINK_CHNL,
- .max_frame_size = NFCWILINK_MAX_FRAME_SIZE,
- .hdr_len = (NFCWILINK_HDR_LEN-1), /* not including chnl byte */
- .offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR,
- .len_size = NFCWILINK_LEN_SIZE,
- .reserve = 0,
- .recv = nfcwilink_receive,
- .reg_complete_cb = nfcwilink_register_complete,
- .write = NULL,
-};
-
-static int nfcwilink_open(struct nci_dev *ndev)
-{
- struct nfcwilink *drv = nci_get_drvdata(ndev);
- unsigned long comp_ret;
- int rc;
-
- if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) {
- rc = -EBUSY;
- goto exit;
- }
-
- nfcwilink_proto.priv_data = drv;
-
- init_completion(&drv->completed);
- drv->st_register_cb_status = -EINPROGRESS;
-
- rc = st_register(&nfcwilink_proto);
- if (rc < 0) {
- if (rc == -EINPROGRESS) {
- comp_ret = wait_for_completion_timeout(
- &drv->completed,
- msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT));
-
- dev_dbg(&drv->pdev->dev,
- "wait_for_completion_timeout returned %ld\n",
- comp_ret);
-
- if (comp_ret == 0) {
- /* timeout */
- rc = -ETIMEDOUT;
- goto clear_exit;
- } else if (drv->st_register_cb_status != 0) {
- rc = drv->st_register_cb_status;
- nfc_err(&drv->pdev->dev,
- "st_register_cb failed %d\n", rc);
- goto clear_exit;
- }
- } else {
- nfc_err(&drv->pdev->dev, "st_register failed %d\n", rc);
- goto clear_exit;
- }
- }
-
- /* st_register MUST fill the write callback */
- BUG_ON(nfcwilink_proto.write == NULL);
- drv->st_write = nfcwilink_proto.write;
-
- if (nfcwilink_download_fw(drv)) {
- nfc_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d\n",
- rc);
- /* open should succeed, even if the FW download failed */
- }
-
- goto exit;
-
-clear_exit:
- clear_bit(NFCWILINK_RUNNING, &drv->flags);
-
-exit:
- return rc;
-}
-
-static int nfcwilink_close(struct nci_dev *ndev)
-{
- struct nfcwilink *drv = nci_get_drvdata(ndev);
- int rc;
-
- if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags))
- return 0;
-
- rc = st_unregister(&nfcwilink_proto);
- if (rc)
- nfc_err(&drv->pdev->dev, "st_unregister failed %d\n", rc);
-
- drv->st_write = NULL;
-
- return rc;
-}
-
-static int nfcwilink_send(struct nci_dev *ndev, struct sk_buff *skb)
-{
- struct nfcwilink *drv = nci_get_drvdata(ndev);
- struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000};
- long len;
-
- dev_dbg(&drv->pdev->dev, "send entry, len %d\n", skb->len);
-
- if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) {
- kfree_skb(skb);
- return -EINVAL;
- }
-
- /* add the ST hdr to the start of the buffer */
- hdr.len = cpu_to_le16(skb->len);
- memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN);
-
- /* Insert skb to shared transport layer's transmit queue.
- * Freeing skb memory is taken care in shared transport layer,
- * so don't free skb memory here.
- */
- len = drv->st_write(skb);
- if (len < 0) {
- kfree_skb(skb);
- nfc_err(&drv->pdev->dev, "st_write failed %ld\n", len);
- return -EFAULT;
- }
-
- return 0;
-}
-
-static struct nci_ops nfcwilink_ops = {
- .open = nfcwilink_open,
- .close = nfcwilink_close,
- .send = nfcwilink_send,
-};
-
-static int nfcwilink_probe(struct platform_device *pdev)
-{
- struct nfcwilink *drv;
- int rc;
- __u32 protocols;
-
- drv = devm_kzalloc(&pdev->dev, sizeof(struct nfcwilink), GFP_KERNEL);
- if (!drv) {
- rc = -ENOMEM;
- goto exit;
- }
-
- drv->pdev = pdev;
-
- 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;
-
- drv->ndev = nci_allocate_device(&nfcwilink_ops,
- protocols,
- NFCWILINK_HDR_LEN,
- 0);
- if (!drv->ndev) {
- nfc_err(&pdev->dev, "nci_allocate_device failed\n");
- rc = -ENOMEM;
- goto exit;
- }
-
- nci_set_parent_dev(drv->ndev, &pdev->dev);
- nci_set_drvdata(drv->ndev, drv);
-
- rc = nci_register_device(drv->ndev);
- if (rc < 0) {
- nfc_err(&pdev->dev, "nci_register_device failed %d\n", rc);
- goto free_dev_exit;
- }
-
- dev_set_drvdata(&pdev->dev, drv);
-
- goto exit;
-
-free_dev_exit:
- nci_free_device(drv->ndev);
-
-exit:
- return rc;
-}
-
-static int nfcwilink_remove(struct platform_device *pdev)
-{
- struct nfcwilink *drv = dev_get_drvdata(&pdev->dev);
- struct nci_dev *ndev;
-
- if (!drv)
- return -EFAULT;
-
- ndev = drv->ndev;
-
- nci_unregister_device(ndev);
- nci_free_device(ndev);
-
- return 0;
-}
-
-static struct platform_driver nfcwilink_driver = {
- .probe = nfcwilink_probe,
- .remove = nfcwilink_remove,
- .driver = {
- .name = "nfcwilink",
- },
-};
-
-module_platform_driver(nfcwilink_driver);
-
-/* ------ Module Info ------ */
-
-MODULE_AUTHOR("Ilan Elias <ilane@ti.com>");
-MODULE_DESCRIPTION("NFC Driver for TI Shared Transport");
-MODULE_LICENSE("GPL");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff