b853cb9628
By passing the smd channel reference to the callback, rather than the smd device, we can open additional smd channels from sub-devices of smd devices. Also updates the two smd clients today found in mainline. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
#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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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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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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#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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int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
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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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#endif
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