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139 lines
3.4 KiB
139 lines
3.4 KiB
#ifndef __QCOM_SMD_H__ |
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#define __QCOM_SMD_H__ |
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#include <linux/device.h> |
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#include <linux/mod_devicetable.h> |
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struct qcom_smd; |
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struct qcom_smd_channel; |
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struct qcom_smd_lookup; |
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/** |
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* struct qcom_smd_id - struct used for matching a smd device |
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* @name: name of the channel |
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*/ |
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struct qcom_smd_id { |
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char name[20]; |
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}; |
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/** |
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* struct qcom_smd_device - smd device struct |
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* @dev: the device struct |
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* @channel: handle to the smd channel for this device |
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*/ |
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struct qcom_smd_device { |
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struct device dev; |
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struct qcom_smd_channel *channel; |
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}; |
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typedef int (*qcom_smd_cb_t)(struct qcom_smd_channel *, const void *, size_t); |
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/** |
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* struct qcom_smd_driver - smd driver struct |
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* @driver: underlying device driver |
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* @smd_match_table: static channel match table |
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* @probe: invoked when the smd channel is found |
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* @remove: invoked when the smd channel is closed |
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* @callback: invoked when an inbound message is received on the channel, |
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* should return 0 on success or -EBUSY if the data cannot be |
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* consumed at this time |
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*/ |
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struct qcom_smd_driver { |
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struct device_driver driver; |
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const struct qcom_smd_id *smd_match_table; |
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int (*probe)(struct qcom_smd_device *dev); |
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void (*remove)(struct qcom_smd_device *dev); |
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qcom_smd_cb_t callback; |
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}; |
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#if IS_ENABLED(CONFIG_QCOM_SMD) |
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int qcom_smd_driver_register(struct qcom_smd_driver *drv); |
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void qcom_smd_driver_unregister(struct qcom_smd_driver *drv); |
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struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *channel, |
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const char *name, |
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qcom_smd_cb_t cb); |
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void qcom_smd_close_channel(struct qcom_smd_channel *channel); |
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void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel); |
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void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data); |
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int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len); |
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struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent, |
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struct device_node *node); |
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int qcom_smd_unregister_edge(struct qcom_smd_edge *edge); |
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#else |
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static inline int qcom_smd_driver_register(struct qcom_smd_driver *drv) |
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{ |
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return -ENXIO; |
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} |
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static inline void qcom_smd_driver_unregister(struct qcom_smd_driver *drv) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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} |
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static inline struct qcom_smd_channel * |
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qcom_smd_open_channel(struct qcom_smd_channel *channel, |
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const char *name, |
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qcom_smd_cb_t cb) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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return NULL; |
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} |
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static inline void qcom_smd_close_channel(struct qcom_smd_channel *channel) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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} |
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static inline void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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return NULL; |
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} |
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static inline void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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} |
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static inline int qcom_smd_send(struct qcom_smd_channel *channel, |
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const void *data, int len) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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return -ENXIO; |
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} |
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static inline struct qcom_smd_edge * |
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qcom_smd_register_edge(struct device *parent, |
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struct device_node *node) |
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{ |
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return ERR_PTR(-ENXIO); |
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} |
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static inline int qcom_smd_unregister_edge(struct qcom_smd_edge *edge) |
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{ |
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/* This shouldn't be possible */ |
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WARN_ON(1); |
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return -ENXIO; |
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} |
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#endif |
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#define module_qcom_smd_driver(__smd_driver) \ |
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module_driver(__smd_driver, qcom_smd_driver_register, \ |
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qcom_smd_driver_unregister) |
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#endif
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