diff options
Diffstat (limited to 'drivers/media/pci/cx18/cx18-mailbox.h')
| -rw-r--r-- | drivers/media/pci/cx18/cx18-mailbox.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/media/pci/cx18/cx18-mailbox.h b/drivers/media/pci/cx18/cx18-mailbox.h new file mode 100644 index 000000000000..b63fdfaac49e --- /dev/null +++ b/drivers/media/pci/cx18/cx18-mailbox.h @@ -0,0 +1,95 @@ +/* + * cx18 mailbox functions + * + * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> + * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307 USA + */ + +#ifndef _CX18_MAILBOX_H_ +#define _CX18_MAILBOX_H_ + +/* mailbox max args */ +#define MAX_MB_ARGUMENTS 6 +/* compatibility, should be same as the define in cx2341x.h */ +#define CX2341X_MBOX_MAX_DATA 16 + +#define MB_RESERVED_HANDLE_0 0 +#define MB_RESERVED_HANDLE_1 0xFFFFFFFF + +#define APU 0 +#define CPU 1 +#define EPU 2 +#define HPU 3 + +struct cx18; + +/* + * This structure is used by CPU to provide completed MDL & buffers information. + * Its structure is dictated by the layout of the SCB, required by the + * firmware, but its definition needs to be here, instead of in cx18-scb.h, + * for mailbox work order scheduling + */ +struct cx18_mdl_ack { + u32 id; /* ID of a completed MDL */ + u32 data_used; /* Total data filled in the MDL with 'id' */ +}; + +/* The cx18_mailbox struct is the mailbox structure which is used for passing + messages between processors */ +struct cx18_mailbox { + /* The sender sets a handle in 'request' after he fills the command. The + 'request' should be different than 'ack'. The sender, also, generates + an interrupt on XPU2YPU_irq where XPU is the sender and YPU is the + receiver. */ + u32 request; + /* The receiver detects a new command when 'req' is different than 'ack'. + He sets 'ack' to the same value as 'req' to clear the command. He, also, + generates an interrupt on YPU2XPU_irq where XPU is the sender and YPU + is the receiver. */ + u32 ack; + u32 reserved[6]; + /* 'cmd' identifies the command. The list of these commands are in + cx23418.h */ + u32 cmd; + /* Each command can have up to 6 arguments */ + u32 args[MAX_MB_ARGUMENTS]; + /* The return code can be one of the codes in the file cx23418.h. If the + command is completed successfully, the error will be ERR_SYS_SUCCESS. + If it is pending, the code is ERR_SYS_PENDING. If it failed, the error + code would indicate the task from which the error originated and will + be one of the errors in cx23418.h. In that case, the following + applies ((error & 0xff) != 0). + If the command is pending, the return will be passed in a MB from the + receiver to the sender. 'req' will be returned in args[0] */ + u32 error; +}; + +struct cx18_stream; + +int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[]); +int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS], u32 cmd, + int args, ...); +int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...); +int cx18_api_func(void *priv, u32 cmd, int in, int out, + u32 data[CX2341X_MBOX_MAX_DATA]); + +void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu); + +void cx18_in_work_handler(struct work_struct *work); + +#endif |