92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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/* Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/sysfs.h>
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#include <linux/nvs.h>
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#define NVS_ALIGN L1_CACHE_BYTES
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struct nvs_buf_ch {
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unsigned int buf_i;
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unsigned int byte_n;
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bool sign;
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};
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struct nvs_dev_attr {
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struct device_attribute dev_attr;
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unsigned int channel;
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};
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#define to_nvs_dev_attr(_dev_attr) \
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container_of(_dev_attr, struct nvs_dev_attr, dev_attr)
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struct nvs_state {
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void *client;
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struct nvs_kif_fn *kif_fn;
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struct device *dev;
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struct mutex mutex;
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struct nvs_fn_dev *fn_dev;
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struct sensor_cfg *cfg;
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struct nvs_dev_attr *attr_so;
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struct nvs_dev_attr *attr_ch;
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struct attribute **attrs;
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struct attribute_group attr_grp;
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struct nvs_buf_ch *buf_ch;
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unsigned int attr_so_n;
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unsigned int snsr_type;
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unsigned int ch_n;
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unsigned int enabled;
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unsigned int us_period;
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unsigned int us_timeout;
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unsigned int dbg;
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unsigned int fn_dev_sts;
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unsigned int fn_dev_errs;
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bool shutdown;
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bool suspend;
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bool flush;
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bool first_push;
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bool on_change;
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bool one_shot;
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bool special;
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s64 ts_diff;
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s64 ts;
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u64 dbg_data_lock;
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u8 *buf;
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};
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struct nvs_kif_fn {
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char *name;
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unsigned int driver_version;
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void (*remove)(struct nvs_state *st);
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int (*init)(struct nvs_state *st);
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int (*push)(struct nvs_state *st);
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};
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int nvs_probe(void **handle, void *dev_client, struct device *dev,
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struct nvs_fn_dev *fn_dev, struct sensor_cfg *snsr_cfg,
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struct nvs_kif_fn *kif_fn, unsigned int kif_st_n);
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int nvs_remove(void *handle);
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void nvs_shutdown(void *handle);
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void nvs_mutex_lock(void *handle);
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void nvs_mutex_unlock(void *handle);
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int nvs_suspend(void *handle);
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int nvs_resume(void *handle);
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int nvs_handler(void *handle, void *buffer, s64 ts);
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static inline void *nvs_st_kif(struct nvs_state *st)
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{
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return (char *)st + ALIGN(sizeof(struct nvs_state), NVS_ALIGN);
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}
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