Ningkai Zhuang
e77bc813ae
1 NFC driver will mmi.nfc to decide if need to probe 2 Add NXP SN1xx driver to DLKM 3 Fix ST driver building error on v(CR) Change-Id: If7f6b1439c7214c4eaaef4ed1368a89988802c67 Signed-off-by: Ningkai Zhuang <zhuangnk1@lenovo.com> Reviewed-on: https://gerrit.mot.com/1788053 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Reviewed-by: Zishang Zhou <zhouzs1@motorola.com> Reviewed-by: Tao Sun <suntao2@motorola.com> Submit-Approved: Jira Key
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef _NFC_I3C_DRV_H_
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#define _NFC_I3C_DRV_H_
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#include <linux/i3c/master.h>
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#include <linux/i3c/device.h>
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//to to kept same as dt
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#define NFC_I3C_DRV_STR "qcom,sn-nci-i3c"
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#define NFC_I3C_MANU_ID (0x011B)
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#define NFC_I3C_PART_ID (0)
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//Byte indicating I3C Read
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#define NFC_I3C_READ 1
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//Byte indicating I3C Write
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#define NFC_I3C_WRITE 0
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// Maximum no of IBI slot
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#define NUM_NFC_IBI_SLOT 1
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// Maximum IBI payload length
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#define MAX_IBI_PAYLOAD_LEN 0
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// CRC len to be read
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#define FW_CRC_LEN 2
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// FW DNLD HDR length
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#define FW_HDR_LEN 2
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// Time to wait before retrying I3C writes, in micro seconds
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#define RETRY_WAIT_TIME_USEC (2000)
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// Retry count for enable/disable IBI CCC
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#define RETRY_COUNT_IBI (3)
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// I3C WorkQueue name
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#define NFC_I3C_WORKQUEUE "nfc_i3c_workq"
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/* Time(in ms) to wait for NCI packet respones */
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#define MAX_IBI_WAIT_TIME (2000)
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struct nfc_dev;
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/**
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* struct nci_buf - NCI buffer used to store and retrieve read data from device.
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* @read_offset: The offset pointing to data available to read in nci buf.
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* @write_offset: The offset pointing to free buf available to write.
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* @total_size: Size of nci buf.
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* @kbuf: allocated nci buf.
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*/
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struct nci_buf {
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unsigned int read_offset;
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unsigned int write_offset;
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size_t total_size;
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char *kbuf;
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};
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/**
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* struct i3c_dev Structure representing device and driver data.
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* @i3c_device Structure to represent I3C device.
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* @wq: NCI workqueue for handling IBI request.
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* @work: Work added to workqueue to read data from IBI handler.
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* @buf Driver buf store read data from device.Read call will
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* fetch from this buffer.
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* @nci_buf_mutex: mutex to protect NCI buf retrieve/store .
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* @read_cplt: Completion to wait for read data to be available.
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* @read_kbuf_len: Temp buf len to hold I3C data.
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* @read_kbuf: Temp buf to hold I3C data.
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* @read_hdr Header size for reads.
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* @ibi_enabled: IBI enabled or not.
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* @pm_state: PM state of NFC I3C device.
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* @nfc_read_direct Do NFC read bypassing the read buffer.
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* @is_probe_done Is NFC I3C probe completed.
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*/
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struct i3c_dev {
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struct i3c_device *device;
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struct workqueue_struct *wq;
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struct work_struct work;
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struct nci_buf buf;
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struct mutex nci_buf_mutex;
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struct completion read_cplt;
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size_t read_kbuf_len;
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char *read_kbuf;
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unsigned char read_hdr;
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bool ibi_enabled;
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atomic_t pm_state;
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int (*nfc_read_direct)(struct nfc_dev *dev,
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char *buf, size_t count);
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bool is_probe_done;
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};
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int nfc_i3c_dev_probe(struct i3c_device *device);
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int nfc_i3c_dev_remove(struct i3c_device *device);
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int nfc_i3c_dev_suspend(struct device *device);
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int nfc_i3c_dev_resume(struct device *device);
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#if IS_ENABLED(CONFIG_NFC_QTI_I3C)
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int i3c_enable_ibi(struct nfc_dev *dev);
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int i3c_disable_ibi(struct nfc_dev *dev);
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int i3c_write(struct nfc_dev *dev, const char *buf, const size_t count,
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int max_retry_cnt);
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int i3c_read(struct nfc_dev *dev, char *buf, size_t count);
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int i3c_nci_kbuf_retrieve(struct nfc_dev *dev, char *buf,
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size_t count);
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#else
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static inline int i3c_enable_ibi(struct nfc_dev *dev)
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{
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return -ENXIO;
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}
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static inline int i3c_disable_ibi(struct nfc_dev *dev)
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{
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return -ENXIO;
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}
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static inline int i3c_write(struct nfc_dev *dev,
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const char *buf, const size_t count, int max_retry_cnt)
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{
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return -ENXIO;
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}
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static inline int i3c_read(struct nfc_dev *dev,
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char *buf, size_t count)
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{
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return -ENXIO;
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}
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static inline int i3c_nci_kbuf_retrieve(struct nfc_dev *dev,
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char *buf, size_t count)
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{
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return -ENXIO;
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}
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#endif
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#endif //_NFC_I3C_DRV_H_
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