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Diffstat (limited to 'include/linux/mailbox_client.h')
| -rw-r--r-- | include/linux/mailbox_client.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/mailbox_client.h b/include/linux/mailbox_client.h new file mode 100644 index 00000000000..53eb0784261 --- /dev/null +++ b/include/linux/mailbox_client.h @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2014 Linaro Ltd. + * Author: Jassi Brar <jassisinghbrar@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __MAILBOX_CLIENT_H +#define __MAILBOX_CLIENT_H + +#include <linux/of.h> + +struct mbox_chan; + +/** + * struct mbox_client - User of a mailbox + * @dev: The client device + * @chan_name: The "controller:channel" this client wants + * @rx_callback: Atomic callback to provide client the data received + * @tx_done: Atomic callback to tell client of data transmission + * @tx_block: If the mbox_send_message should block until data is + * transmitted. + * @tx_tout: Max block period in ms before TX is assumed failure + * @knows_txdone: if the client could run the TX state machine. Usually + * if the client receives some ACK packet for transmission. + * Unused if the controller already has TX_Done/RTR IRQ. + */ +struct mbox_client { + struct device *dev; + const char *chan_name; + void (*rx_callback)(struct mbox_client *cl, void *mssg); + void (*tx_done)(struct mbox_client *cl, void *mssg, int r); + bool tx_block; + unsigned long tx_tout; + bool knows_txdone; +}; + +struct mbox_chan *mbox_request_channel(const struct mbox_client *cl); +int mbox_send_message(struct mbox_chan *chan, void *mssg); +void mbox_client_txdone(struct mbox_chan *chan, int r); +void mbox_free_channel(struct mbox_chan *chan); + +#endif /* __MAILBOX_CLIENT_H */ |