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58e7dcc9ca
'params' is allocated in digital_tg_listen_mdaa(), but not free when
digital_send_cmd() failed, which will cause memory leak. Fix it by
freeing 'params' if digital_send_cmd() return failed.
Fixes: 1c7a4c24fb
("NFC Digital: Add target NFC-DEP support")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
862 lines
20 KiB
C
862 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* NFC Digital Protocol stack
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* Copyright (c) 2013, Intel Corporation.
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*/
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#define pr_fmt(fmt) "digital: %s: " fmt, __func__
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#include <linux/module.h>
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#include "digital.h"
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#define DIGITAL_PROTO_NFCA_RF_TECH \
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(NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | \
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NFC_PROTO_NFC_DEP_MASK | NFC_PROTO_ISO14443_MASK)
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#define DIGITAL_PROTO_NFCB_RF_TECH NFC_PROTO_ISO14443_B_MASK
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#define DIGITAL_PROTO_NFCF_RF_TECH \
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(NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK)
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#define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK
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/* Delay between each poll frame (ms) */
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#define DIGITAL_POLL_INTERVAL 10
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struct digital_cmd {
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struct list_head queue;
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u8 type;
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u8 pending;
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u16 timeout;
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struct sk_buff *req;
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struct sk_buff *resp;
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struct digital_tg_mdaa_params *mdaa_params;
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nfc_digital_cmd_complete_t cmd_cb;
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void *cb_context;
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};
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struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
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unsigned int len)
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{
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struct sk_buff *skb;
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skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom,
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GFP_KERNEL);
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if (skb)
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skb_reserve(skb, ddev->tx_headroom);
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return skb;
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}
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void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
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u8 bitwise_inv, u8 msb_first)
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{
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u16 crc;
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crc = crc_func(init, skb->data, skb->len);
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if (bitwise_inv)
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crc = ~crc;
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if (msb_first)
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crc = __fswab16(crc);
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skb_put_u8(skb, crc & 0xFF);
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skb_put_u8(skb, (crc >> 8) & 0xFF);
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}
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int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
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u16 crc_init, u8 bitwise_inv, u8 msb_first)
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{
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int rc;
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u16 crc;
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if (skb->len <= 2)
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return -EIO;
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crc = crc_func(crc_init, skb->data, skb->len - 2);
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if (bitwise_inv)
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crc = ~crc;
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if (msb_first)
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crc = __swab16(crc);
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rc = (skb->data[skb->len - 2] - (crc & 0xFF)) +
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(skb->data[skb->len - 1] - ((crc >> 8) & 0xFF));
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if (rc)
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return -EIO;
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skb_trim(skb, skb->len - 2);
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return 0;
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}
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static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on)
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{
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ddev->ops->switch_rf(ddev, on);
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}
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static inline void digital_abort_cmd(struct nfc_digital_dev *ddev)
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{
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ddev->ops->abort_cmd(ddev);
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}
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static void digital_wq_cmd_complete(struct work_struct *work)
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{
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struct digital_cmd *cmd;
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struct nfc_digital_dev *ddev = container_of(work,
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struct nfc_digital_dev,
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cmd_complete_work);
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mutex_lock(&ddev->cmd_lock);
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cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
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queue);
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if (!cmd) {
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mutex_unlock(&ddev->cmd_lock);
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return;
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}
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list_del(&cmd->queue);
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mutex_unlock(&ddev->cmd_lock);
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if (!IS_ERR(cmd->resp))
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print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1,
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cmd->resp->data, cmd->resp->len, false);
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cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp);
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kfree(cmd->mdaa_params);
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kfree(cmd);
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schedule_work(&ddev->cmd_work);
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}
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static void digital_send_cmd_complete(struct nfc_digital_dev *ddev,
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void *arg, struct sk_buff *resp)
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{
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struct digital_cmd *cmd = arg;
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cmd->resp = resp;
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schedule_work(&ddev->cmd_complete_work);
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}
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static void digital_wq_cmd(struct work_struct *work)
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{
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int rc;
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struct digital_cmd *cmd;
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struct digital_tg_mdaa_params *params;
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struct nfc_digital_dev *ddev = container_of(work,
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struct nfc_digital_dev,
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cmd_work);
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mutex_lock(&ddev->cmd_lock);
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cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
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queue);
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if (!cmd || cmd->pending) {
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mutex_unlock(&ddev->cmd_lock);
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return;
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}
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cmd->pending = 1;
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mutex_unlock(&ddev->cmd_lock);
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if (cmd->req)
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print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1,
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cmd->req->data, cmd->req->len, false);
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switch (cmd->type) {
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case DIGITAL_CMD_IN_SEND:
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rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout,
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digital_send_cmd_complete, cmd);
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break;
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case DIGITAL_CMD_TG_SEND:
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rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout,
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digital_send_cmd_complete, cmd);
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break;
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case DIGITAL_CMD_TG_LISTEN:
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rc = ddev->ops->tg_listen(ddev, cmd->timeout,
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digital_send_cmd_complete, cmd);
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break;
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case DIGITAL_CMD_TG_LISTEN_MDAA:
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params = cmd->mdaa_params;
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rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout,
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digital_send_cmd_complete, cmd);
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break;
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case DIGITAL_CMD_TG_LISTEN_MD:
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rc = ddev->ops->tg_listen_md(ddev, cmd->timeout,
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digital_send_cmd_complete, cmd);
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break;
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default:
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pr_err("Unknown cmd type %d\n", cmd->type);
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return;
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}
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if (!rc)
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return;
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pr_err("in_send_command returned err %d\n", rc);
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mutex_lock(&ddev->cmd_lock);
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list_del(&cmd->queue);
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mutex_unlock(&ddev->cmd_lock);
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kfree_skb(cmd->req);
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kfree(cmd->mdaa_params);
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kfree(cmd);
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schedule_work(&ddev->cmd_work);
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}
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int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
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struct sk_buff *skb, struct digital_tg_mdaa_params *params,
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u16 timeout, nfc_digital_cmd_complete_t cmd_cb,
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void *cb_context)
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{
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struct digital_cmd *cmd;
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cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
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if (!cmd)
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return -ENOMEM;
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cmd->type = cmd_type;
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cmd->timeout = timeout;
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cmd->req = skb;
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cmd->mdaa_params = params;
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cmd->cmd_cb = cmd_cb;
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cmd->cb_context = cb_context;
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INIT_LIST_HEAD(&cmd->queue);
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mutex_lock(&ddev->cmd_lock);
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list_add_tail(&cmd->queue, &ddev->cmd_queue);
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mutex_unlock(&ddev->cmd_lock);
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schedule_work(&ddev->cmd_work);
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return 0;
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}
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int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
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{
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int rc;
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rc = ddev->ops->in_configure_hw(ddev, type, param);
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if (rc)
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pr_err("in_configure_hw failed: %d\n", rc);
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return rc;
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}
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int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
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{
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int rc;
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rc = ddev->ops->tg_configure_hw(ddev, type, param);
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if (rc)
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pr_err("tg_configure_hw failed: %d\n", rc);
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return rc;
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}
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static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech)
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{
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struct digital_tg_mdaa_params *params;
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int rc;
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params = kzalloc(sizeof(*params), GFP_KERNEL);
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if (!params)
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return -ENOMEM;
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params->sens_res = DIGITAL_SENS_RES_NFC_DEP;
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get_random_bytes(params->nfcid1, sizeof(params->nfcid1));
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params->sel_res = DIGITAL_SEL_RES_NFC_DEP;
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params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
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params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
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get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2);
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params->sc = DIGITAL_SENSF_FELICA_SC;
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rc = digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params,
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500, digital_tg_recv_atr_req, NULL);
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if (rc)
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kfree(params);
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return rc;
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}
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static int digital_tg_listen_md(struct nfc_digital_dev *ddev, u8 rf_tech)
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{
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return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MD, NULL, NULL, 500,
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digital_tg_recv_md_req, NULL);
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}
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int digital_target_found(struct nfc_digital_dev *ddev,
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struct nfc_target *target, u8 protocol)
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{
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int rc;
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u8 framing;
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u8 rf_tech;
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u8 poll_tech_count;
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int (*check_crc)(struct sk_buff *skb);
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void (*add_crc)(struct sk_buff *skb);
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rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech;
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switch (protocol) {
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case NFC_PROTO_JEWEL:
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framing = NFC_DIGITAL_FRAMING_NFCA_T1T;
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check_crc = digital_skb_check_crc_b;
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add_crc = digital_skb_add_crc_b;
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break;
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case NFC_PROTO_MIFARE:
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framing = NFC_DIGITAL_FRAMING_NFCA_T2T;
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check_crc = digital_skb_check_crc_a;
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add_crc = digital_skb_add_crc_a;
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break;
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case NFC_PROTO_FELICA:
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framing = NFC_DIGITAL_FRAMING_NFCF_T3T;
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check_crc = digital_skb_check_crc_f;
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add_crc = digital_skb_add_crc_f;
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break;
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case NFC_PROTO_NFC_DEP:
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if (rf_tech == NFC_DIGITAL_RF_TECH_106A) {
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framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP;
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check_crc = digital_skb_check_crc_a;
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add_crc = digital_skb_add_crc_a;
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} else {
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framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP;
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check_crc = digital_skb_check_crc_f;
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add_crc = digital_skb_add_crc_f;
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}
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break;
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case NFC_PROTO_ISO15693:
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framing = NFC_DIGITAL_FRAMING_ISO15693_T5T;
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check_crc = digital_skb_check_crc_b;
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add_crc = digital_skb_add_crc_b;
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break;
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case NFC_PROTO_ISO14443:
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framing = NFC_DIGITAL_FRAMING_NFCA_T4T;
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check_crc = digital_skb_check_crc_a;
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add_crc = digital_skb_add_crc_a;
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break;
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case NFC_PROTO_ISO14443_B:
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framing = NFC_DIGITAL_FRAMING_NFCB_T4T;
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check_crc = digital_skb_check_crc_b;
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add_crc = digital_skb_add_crc_b;
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break;
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default:
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pr_err("Invalid protocol %d\n", protocol);
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return -EINVAL;
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}
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pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol);
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ddev->curr_rf_tech = rf_tech;
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if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
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ddev->skb_add_crc = digital_skb_add_crc_none;
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ddev->skb_check_crc = digital_skb_check_crc_none;
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} else {
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ddev->skb_add_crc = add_crc;
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ddev->skb_check_crc = check_crc;
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}
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rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing);
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if (rc)
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return rc;
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target->supported_protocols = (1 << protocol);
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poll_tech_count = ddev->poll_tech_count;
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ddev->poll_tech_count = 0;
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rc = nfc_targets_found(ddev->nfc_dev, target, 1);
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if (rc) {
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ddev->poll_tech_count = poll_tech_count;
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return rc;
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}
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return 0;
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}
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void digital_poll_next_tech(struct nfc_digital_dev *ddev)
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{
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u8 rand_mod;
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digital_switch_rf(ddev, 0);
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mutex_lock(&ddev->poll_lock);
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if (!ddev->poll_tech_count) {
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mutex_unlock(&ddev->poll_lock);
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return;
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}
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get_random_bytes(&rand_mod, sizeof(rand_mod));
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ddev->poll_tech_index = rand_mod % ddev->poll_tech_count;
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mutex_unlock(&ddev->poll_lock);
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schedule_delayed_work(&ddev->poll_work,
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msecs_to_jiffies(DIGITAL_POLL_INTERVAL));
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}
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static void digital_wq_poll(struct work_struct *work)
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{
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int rc;
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struct digital_poll_tech *poll_tech;
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struct nfc_digital_dev *ddev = container_of(work,
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struct nfc_digital_dev,
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poll_work.work);
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mutex_lock(&ddev->poll_lock);
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if (!ddev->poll_tech_count) {
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mutex_unlock(&ddev->poll_lock);
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return;
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}
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poll_tech = &ddev->poll_techs[ddev->poll_tech_index];
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mutex_unlock(&ddev->poll_lock);
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rc = poll_tech->poll_func(ddev, poll_tech->rf_tech);
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if (rc)
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digital_poll_next_tech(ddev);
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}
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static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech,
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digital_poll_t poll_func)
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{
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struct digital_poll_tech *poll_tech;
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if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX)
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return;
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poll_tech = &ddev->poll_techs[ddev->poll_tech_count++];
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poll_tech->rf_tech = rf_tech;
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poll_tech->poll_func = poll_func;
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}
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/**
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* digital_start_poll - start_poll operation
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* @nfc_dev: device to be polled
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* @im_protocols: bitset of nfc initiator protocols to be used for polling
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* @tm_protocols: bitset of nfc transport protocols to be used for polling
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*
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* For every supported protocol, the corresponding polling function is added
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* to the table of polling technologies (ddev->poll_techs[]) using
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* digital_add_poll_tech().
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* When a polling function fails (by timeout or protocol error) the next one is
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* schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work).
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*/
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static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
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__u32 tm_protocols)
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{
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struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
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u32 matching_im_protocols, matching_tm_protocols;
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pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols,
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tm_protocols, ddev->protocols);
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matching_im_protocols = ddev->protocols & im_protocols;
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matching_tm_protocols = ddev->protocols & tm_protocols;
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if (!matching_im_protocols && !matching_tm_protocols) {
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pr_err("Unknown protocol\n");
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return -EINVAL;
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}
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if (ddev->poll_tech_count) {
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pr_err("Already polling\n");
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return -EBUSY;
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}
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if (ddev->curr_protocol) {
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pr_err("A target is already active\n");
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return -EBUSY;
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}
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ddev->poll_tech_count = 0;
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ddev->poll_tech_index = 0;
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|
|
|
if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH)
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
|
|
digital_in_send_sens_req);
|
|
|
|
if (matching_im_protocols & DIGITAL_PROTO_NFCB_RF_TECH)
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106B,
|
|
digital_in_send_sensb_req);
|
|
|
|
if (matching_im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) {
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
|
|
digital_in_send_sensf_req);
|
|
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
|
|
digital_in_send_sensf_req);
|
|
}
|
|
|
|
if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH)
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693,
|
|
digital_in_send_iso15693_inv_req);
|
|
|
|
if (matching_tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
|
|
if (ddev->ops->tg_listen_mdaa) {
|
|
digital_add_poll_tech(ddev, 0,
|
|
digital_tg_listen_mdaa);
|
|
} else if (ddev->ops->tg_listen_md) {
|
|
digital_add_poll_tech(ddev, 0,
|
|
digital_tg_listen_md);
|
|
} else {
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
|
|
digital_tg_listen_nfca);
|
|
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
|
|
digital_tg_listen_nfcf);
|
|
|
|
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
|
|
digital_tg_listen_nfcf);
|
|
}
|
|
}
|
|
|
|
if (!ddev->poll_tech_count) {
|
|
pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n",
|
|
matching_im_protocols, matching_tm_protocols);
|
|
return -EINVAL;
|
|
}
|
|
|
|
schedule_delayed_work(&ddev->poll_work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void digital_stop_poll(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
|
|
mutex_lock(&ddev->poll_lock);
|
|
|
|
if (!ddev->poll_tech_count) {
|
|
pr_err("Polling operation was not running\n");
|
|
mutex_unlock(&ddev->poll_lock);
|
|
return;
|
|
}
|
|
|
|
ddev->poll_tech_count = 0;
|
|
|
|
mutex_unlock(&ddev->poll_lock);
|
|
|
|
cancel_delayed_work_sync(&ddev->poll_work);
|
|
|
|
digital_abort_cmd(ddev);
|
|
}
|
|
|
|
static int digital_dev_up(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
|
|
digital_switch_rf(ddev, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int digital_dev_down(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
|
|
digital_switch_rf(ddev, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int digital_dep_link_up(struct nfc_dev *nfc_dev,
|
|
struct nfc_target *target,
|
|
__u8 comm_mode, __u8 *gb, size_t gb_len)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
int rc;
|
|
|
|
rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
|
|
|
|
if (!rc)
|
|
ddev->curr_protocol = NFC_PROTO_NFC_DEP;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int digital_dep_link_down(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
|
|
digital_abort_cmd(ddev);
|
|
|
|
ddev->curr_protocol = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int digital_activate_target(struct nfc_dev *nfc_dev,
|
|
struct nfc_target *target, __u32 protocol)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
|
|
if (ddev->poll_tech_count) {
|
|
pr_err("Can't activate a target while polling\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (ddev->curr_protocol) {
|
|
pr_err("A target is already active\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
ddev->curr_protocol = protocol;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void digital_deactivate_target(struct nfc_dev *nfc_dev,
|
|
struct nfc_target *target,
|
|
u8 mode)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
|
|
if (!ddev->curr_protocol) {
|
|
pr_err("No active target\n");
|
|
return;
|
|
}
|
|
|
|
digital_abort_cmd(ddev);
|
|
ddev->curr_protocol = 0;
|
|
}
|
|
|
|
static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(dev);
|
|
|
|
return digital_tg_send_dep_res(ddev, skb);
|
|
}
|
|
|
|
static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg,
|
|
struct sk_buff *resp)
|
|
{
|
|
struct digital_data_exch *data_exch = arg;
|
|
int rc;
|
|
|
|
if (IS_ERR(resp)) {
|
|
rc = PTR_ERR(resp);
|
|
resp = NULL;
|
|
goto done;
|
|
}
|
|
|
|
if (ddev->curr_protocol == NFC_PROTO_MIFARE) {
|
|
rc = digital_in_recv_mifare_res(resp);
|
|
/* crc check is done in digital_in_recv_mifare_res() */
|
|
goto done;
|
|
}
|
|
|
|
if ((ddev->curr_protocol == NFC_PROTO_ISO14443) ||
|
|
(ddev->curr_protocol == NFC_PROTO_ISO14443_B)) {
|
|
rc = digital_in_iso_dep_pull_sod(ddev, resp);
|
|
if (rc)
|
|
goto done;
|
|
}
|
|
|
|
rc = ddev->skb_check_crc(resp);
|
|
|
|
done:
|
|
if (rc) {
|
|
kfree_skb(resp);
|
|
resp = NULL;
|
|
}
|
|
|
|
data_exch->cb(data_exch->cb_context, resp, rc);
|
|
|
|
kfree(data_exch);
|
|
}
|
|
|
|
static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target,
|
|
struct sk_buff *skb, data_exchange_cb_t cb,
|
|
void *cb_context)
|
|
{
|
|
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
|
|
struct digital_data_exch *data_exch;
|
|
int rc;
|
|
|
|
data_exch = kzalloc(sizeof(*data_exch), GFP_KERNEL);
|
|
if (!data_exch)
|
|
return -ENOMEM;
|
|
|
|
data_exch->cb = cb;
|
|
data_exch->cb_context = cb_context;
|
|
|
|
if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) {
|
|
rc = digital_in_send_dep_req(ddev, target, skb, data_exch);
|
|
goto exit;
|
|
}
|
|
|
|
if ((ddev->curr_protocol == NFC_PROTO_ISO14443) ||
|
|
(ddev->curr_protocol == NFC_PROTO_ISO14443_B)) {
|
|
rc = digital_in_iso_dep_push_sod(ddev, skb);
|
|
if (rc)
|
|
goto exit;
|
|
}
|
|
|
|
ddev->skb_add_crc(skb);
|
|
|
|
rc = digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete,
|
|
data_exch);
|
|
|
|
exit:
|
|
if (rc)
|
|
kfree(data_exch);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static const struct nfc_ops digital_nfc_ops = {
|
|
.dev_up = digital_dev_up,
|
|
.dev_down = digital_dev_down,
|
|
.start_poll = digital_start_poll,
|
|
.stop_poll = digital_stop_poll,
|
|
.dep_link_up = digital_dep_link_up,
|
|
.dep_link_down = digital_dep_link_down,
|
|
.activate_target = digital_activate_target,
|
|
.deactivate_target = digital_deactivate_target,
|
|
.tm_send = digital_tg_send,
|
|
.im_transceive = digital_in_send,
|
|
};
|
|
|
|
struct nfc_digital_dev *nfc_digital_allocate_device(const struct nfc_digital_ops *ops,
|
|
__u32 supported_protocols,
|
|
__u32 driver_capabilities,
|
|
int tx_headroom, int tx_tailroom)
|
|
{
|
|
struct nfc_digital_dev *ddev;
|
|
|
|
if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen ||
|
|
!ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd ||
|
|
!ops->switch_rf || (ops->tg_listen_md && !ops->tg_get_rf_tech))
|
|
return NULL;
|
|
|
|
ddev = kzalloc(sizeof(*ddev), GFP_KERNEL);
|
|
if (!ddev)
|
|
return NULL;
|
|
|
|
ddev->driver_capabilities = driver_capabilities;
|
|
ddev->ops = ops;
|
|
|
|
mutex_init(&ddev->cmd_lock);
|
|
INIT_LIST_HEAD(&ddev->cmd_queue);
|
|
|
|
INIT_WORK(&ddev->cmd_work, digital_wq_cmd);
|
|
INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete);
|
|
|
|
mutex_init(&ddev->poll_lock);
|
|
INIT_DELAYED_WORK(&ddev->poll_work, digital_wq_poll);
|
|
|
|
if (supported_protocols & NFC_PROTO_JEWEL_MASK)
|
|
ddev->protocols |= NFC_PROTO_JEWEL_MASK;
|
|
if (supported_protocols & NFC_PROTO_MIFARE_MASK)
|
|
ddev->protocols |= NFC_PROTO_MIFARE_MASK;
|
|
if (supported_protocols & NFC_PROTO_FELICA_MASK)
|
|
ddev->protocols |= NFC_PROTO_FELICA_MASK;
|
|
if (supported_protocols & NFC_PROTO_NFC_DEP_MASK)
|
|
ddev->protocols |= NFC_PROTO_NFC_DEP_MASK;
|
|
if (supported_protocols & NFC_PROTO_ISO15693_MASK)
|
|
ddev->protocols |= NFC_PROTO_ISO15693_MASK;
|
|
if (supported_protocols & NFC_PROTO_ISO14443_MASK)
|
|
ddev->protocols |= NFC_PROTO_ISO14443_MASK;
|
|
if (supported_protocols & NFC_PROTO_ISO14443_B_MASK)
|
|
ddev->protocols |= NFC_PROTO_ISO14443_B_MASK;
|
|
|
|
ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN;
|
|
ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN;
|
|
|
|
ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols,
|
|
ddev->tx_headroom,
|
|
ddev->tx_tailroom);
|
|
if (!ddev->nfc_dev) {
|
|
pr_err("nfc_allocate_device failed\n");
|
|
goto free_dev;
|
|
}
|
|
|
|
nfc_set_drvdata(ddev->nfc_dev, ddev);
|
|
|
|
return ddev;
|
|
|
|
free_dev:
|
|
kfree(ddev);
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(nfc_digital_allocate_device);
|
|
|
|
void nfc_digital_free_device(struct nfc_digital_dev *ddev)
|
|
{
|
|
nfc_free_device(ddev->nfc_dev);
|
|
kfree(ddev);
|
|
}
|
|
EXPORT_SYMBOL(nfc_digital_free_device);
|
|
|
|
int nfc_digital_register_device(struct nfc_digital_dev *ddev)
|
|
{
|
|
return nfc_register_device(ddev->nfc_dev);
|
|
}
|
|
EXPORT_SYMBOL(nfc_digital_register_device);
|
|
|
|
void nfc_digital_unregister_device(struct nfc_digital_dev *ddev)
|
|
{
|
|
struct digital_cmd *cmd, *n;
|
|
|
|
nfc_unregister_device(ddev->nfc_dev);
|
|
|
|
mutex_lock(&ddev->poll_lock);
|
|
ddev->poll_tech_count = 0;
|
|
mutex_unlock(&ddev->poll_lock);
|
|
|
|
cancel_delayed_work_sync(&ddev->poll_work);
|
|
cancel_work_sync(&ddev->cmd_work);
|
|
cancel_work_sync(&ddev->cmd_complete_work);
|
|
|
|
list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) {
|
|
list_del(&cmd->queue);
|
|
|
|
/* Call the command callback if any and pass it a ENODEV error.
|
|
* This gives a chance to the command issuer to free any
|
|
* allocated buffer.
|
|
*/
|
|
if (cmd->cmd_cb)
|
|
cmd->cmd_cb(ddev, cmd->cb_context, ERR_PTR(-ENODEV));
|
|
|
|
kfree(cmd->mdaa_params);
|
|
kfree(cmd);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(nfc_digital_unregister_device);
|
|
|
|
MODULE_LICENSE("GPL");
|