include/linux/soc/qcom/smd.h

   1 #ifndef __QCOM_SMD_H__
   2 #define __QCOM_SMD_H__
   3
   4 #include <linux/device.h>
   5 #include <linux/mod_devicetable.h>
   6
   7 struct qcom_smd;
   8 struct qcom_smd_channel;
   9 struct qcom_smd_lookup;
  10
  11 /**
  12  * struct qcom_smd_id - struct used for matching a smd device
  13  * @name:       name of the channel
  14  */
  15 struct qcom_smd_id {
  16         char name[20];
  17 };
  18
  19 /**
  20  * struct qcom_smd_device - smd device struct
  21  * @dev:        the device struct
  22  * @channel:    handle to the smd channel for this device
  23  */
  24 struct qcom_smd_device {
  25         struct device dev;
  26         struct qcom_smd_channel *channel;
  27 };
  28
  29 typedef int (*qcom_smd_cb_t)(struct qcom_smd_device *, const void *, size_t);
  30
  31 /**
  32  * struct qcom_smd_driver - smd driver struct
  33  * @driver:     underlying device driver
  34  * @smd_match_table: static channel match table
  35  * @probe:      invoked when the smd channel is found
  36  * @remove:     invoked when the smd channel is closed
  37  * @callback:   invoked when an inbound message is received on the channel,
  38  *              should return 0 on success or -EBUSY if the data cannot be
  39  *              consumed at this time
  40  */
  41 struct qcom_smd_driver {
  42         struct device_driver driver;
  43         const struct qcom_smd_id *smd_match_table;
  44
  45         int (*probe)(struct qcom_smd_device *dev);
  46         void (*remove)(struct qcom_smd_device *dev);
  47         qcom_smd_cb_t callback;
  48 };
  49
  50 int qcom_smd_driver_register(struct qcom_smd_driver *drv);
  51 void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
  52
  53 #define module_qcom_smd_driver(__smd_driver) \
  54         module_driver(__smd_driver, qcom_smd_driver_register, \
  55                       qcom_smd_driver_unregister)
  56
  57 int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
  58
  59 struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_device *sdev,
  60                                                const char *name,
  61                                                qcom_smd_cb_t cb);
  62
  63 #endif