mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-01 06:33:07 +00:00
59ee2361c9
This implements the mechanism used to send commands to the driver in initiator mode through in_send_cmd(). Commands are serialized and sent to the driver by using a work item on the system workqueue. Responses are handled asynchronously by another work item. Once the digital stack receives the response through the command_complete callback, the next command is sent to the driver. This also implements the polling mechanism. It's handled by a work item cycling on all supported protocols. The start poll command for a given protocol is sent to the driver using the mechanism described above. The process continues until a peer is discovered or stop_poll is called. This patch implements the poll function for NFC-A that sends a SENS_REQ command and waits for the SENS_RES response. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*
|
|
* NFC Digital Protocol stack
|
|
* Copyright (c) 2013, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef __DIGITAL_H
|
|
#define __DIGITAL_H
|
|
|
|
#include <net/nfc/nfc.h>
|
|
#include <net/nfc/digital.h>
|
|
|
|
#define PR_DBG(fmt, ...) pr_debug("%s: " fmt "\n", __func__, ##__VA_ARGS__)
|
|
#define PR_ERR(fmt, ...) pr_err("%s: " fmt "\n", __func__, ##__VA_ARGS__)
|
|
#define PROTOCOL_ERR(req) pr_err("%s:%d: NFC Digital Protocol error: %s\n", \
|
|
__func__, __LINE__, req)
|
|
|
|
#define DIGITAL_CMD_IN_SEND 0
|
|
#define DIGITAL_CMD_TG_SEND 1
|
|
#define DIGITAL_CMD_TG_LISTEN 2
|
|
#define DIGITAL_CMD_TG_LISTEN_MDAA 3
|
|
|
|
#define DIGITAL_MAX_HEADER_LEN 7
|
|
#define DIGITAL_CRC_LEN 2
|
|
|
|
struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
|
|
unsigned int len);
|
|
|
|
int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
|
|
struct sk_buff *skb, u16 timeout,
|
|
nfc_digital_cmd_complete_t cmd_cb, void *cb_context);
|
|
|
|
int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
|
|
static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
|
|
struct sk_buff *skb, u16 timeout,
|
|
nfc_digital_cmd_complete_t cmd_cb,
|
|
void *cb_context)
|
|
{
|
|
return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, timeout, cmd_cb,
|
|
cb_context);
|
|
}
|
|
|
|
void digital_poll_next_tech(struct nfc_digital_dev *ddev);
|
|
|
|
int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech);
|
|
|
|
#endif /* __DIGITAL_H */
|