diff options
| author | Philippe Langlais <philippe.langlais@stericsson.com> | 2011-10-20 10:13:38 +0200 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:07:09 +0200 |
| commit | 71c53084e41266b6c837f48400dc8d9cd07d6e74 (patch) | |
| tree | bb1438681193c38fcf68aa25a9fa6a54d555089e /arch | |
| parent | ecd3d1c2e397188b5ea04a4ebb1cc8c6f69bf3b3 (diff) | |
U5500 : Mailbox logical driver.
The Mailbox is an inter-processor communication device.
Message passing is possible between different CPU's.
The logical driver allows multiplexing of up to 256
logical channels for each physical mailbox.This driver
uses the services of Physical driver in mbox.c
Mailboxes are only supported on U5500.
ST-Ericsson Linux next: 336280
ST-Ericsson ID: AP 274804
ST-Ericsson FOSS-OUT ID: N/00201-FEA 212 8003
Change-Id: I23bf7e76801b69e13e216f34d88ad5371d787683
Signed-off-by: Bibek Basu <bibek.basu@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/20652
Reviewed-by: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h new file mode 100644 index 00000000000..829b1708bf1 --- /dev/null +++ b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * Author: Marcin Mielczarczyk <marcin.mielczarczyk@tieto.com> for ST-Ericsson. + * Bibek Basu <bibek.basu@stericsson.com> + * License terms: GNU General Public License (GPL), version 2. + */ + +#ifndef __INC_MBOX_CHANNELS_H +#define __INC_MBOX_CHANNELS_H + +/* Maximum number of datawords which can be send in one PDU */ +#define MAILBOX_NR_OF_DATAWORDS 3 + +/** + * mbox_channel_cb_t - Definition of the mailbox channel callback. + * @data: Pointer to the data. + * @length: Length of the data. + * @priv: The client's private data. + * + * This function will be called upon reception of complete mbox channel PDU + * or after completion of send operation. + */ +typedef void mbox_channel_cb_t (u32 *data, u32 length, void *priv); + +/** + * mbox_channel_msg - Definition of mbox channel message + * @channel: Channel number. + * @data: Pointer to data to be sent. + * @length: Length of data to be sent. + * @cb: Pointer to the callback function to be called when send + * operation will be finished. + * @priv: The client's private data. + * + * This structure describes mailbox channel message. + */ +struct mbox_channel_msg { + u16 channel; + u32 *data; + u8 length; + mbox_channel_cb_t *cb; + void *priv; +}; + +/** mbox_channel_register - Set up a given mailbox channel. + * @channel: Mailbox channel number. + * @cb: Pointer to the callback function to be called when a new message + * is received. + * @priv: Client user data which will be returned in the callback. + * + * Returns 0 on success or a negative error code on error. + */ +int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv); + +/** + * mbox_channel_send - Send data on given mailbox channel. + * @msg: Mailbox channel message to be sent. + * + * Returns 0 on success or a negative error code on error. + */ +int mbox_channel_send(struct mbox_channel_msg *msg); + +/** + * mbox_channel_revoke_messages - Revoke messages on given mailbox channel. + * @channel: Mailbox channel number. + * + * Returns 0 on success or a negative error code on error. + */ +int mbox_channel_revoke_messages(u16 channel); + +#endif /*INC_STE_MBOX_H*/ + |