From 34ed5a33b1218efbe8b01e37738063800ccdcdcd Mon Sep 17 00:00:00 2001 From: Ohad Ben-Cohen Date: Thu, 20 Oct 2011 18:53:35 +0200 Subject: remoteproc/omap: add a remoteproc driver for OMAP4 Add a remoteproc driver for OMAP4, so we can boot the dual-M3 and and DSP subsystems. Use the omap_device_* API to control the hardware state, and utilize the OMAP mailbox to interrupt the remote processor when a new message is pending (the mailbox payload is used to tell it which virtqueue was the message placed in). Conversely, when an inbound mailbox message arrives, tell the remoteproc core which virtqueue is triggered. Later we will also use the mailbox payload to signal omap-specific events like remote crashes (which will be used to trigger remoteproc recovery) and power management transitions. At that point we will also extend the remoteproc core to support this. Based on (but now quite far from) work done by Fernando Guzman Lugo and Hari Kanigeri . Designed with Brian Swetland . Signed-off-by: Ohad Ben-Cohen Acked-by: Tony Lindgren Cc: Brian Swetland Cc: Arnd Bergmann Cc: Grant Likely Cc: Russell King Cc: Rusty Russell Cc: Andrew Morton Cc: Greg KH Cc: Stephen Boyd --- arch/arm/plat-omap/include/plat/remoteproc.h | 57 ++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 arch/arm/plat-omap/include/plat/remoteproc.h (limited to 'arch') diff --git a/arch/arm/plat-omap/include/plat/remoteproc.h b/arch/arm/plat-omap/include/plat/remoteproc.h new file mode 100644 index 000000000000..b10eac89e2e9 --- /dev/null +++ b/arch/arm/plat-omap/include/plat/remoteproc.h @@ -0,0 +1,57 @@ +/* + * Remote Processor - omap-specific bits + * + * Copyright (C) 2011 Texas Instruments, Inc. + * Copyright (C) 2011 Google, Inc. + * + * 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. + * + * 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. + */ + +#ifndef _PLAT_REMOTEPROC_H +#define _PLAT_REMOTEPROC_H + +struct rproc_ops; +struct platform_device; + +/* + * struct omap_rproc_pdata - omap remoteproc's platform data + * @name: the remoteproc's name + * @oh_name: omap hwmod device + * @oh_name_opt: optional, secondary omap hwmod device + * @firmware: name of firmware file to load + * @mbox_name: name of omap mailbox device to use with this rproc + * @ops: start/stop rproc handlers + * @device_enable: omap-specific handler for enabling a device + * @device_shutdown: omap-specific handler for shutting down a device + */ +struct omap_rproc_pdata { + const char *name; + const char *oh_name; + const char *oh_name_opt; + const char *firmware; + const char *mbox_name; + const struct rproc_ops *ops; + int (*device_enable) (struct platform_device *pdev); + int (*device_shutdown) (struct platform_device *pdev); +}; + +#if defined(CONFIG_OMAP_REMOTEPROC) || defined(CONFIG_OMAP_REMOTEPROC_MODULE) + +void __init omap_rproc_reserve_cma(void); + +#else + +void __init omap_rproc_reserve_cma(void) +{ +} + +#endif + +#endif /* _PLAT_REMOTEPROC_H */ -- cgit v1.2.3